Assembly principles and debugging points of metal stamping parts

The key to die assembly of metal stamping parts is to ensure that the upper and lower die bases are raised, the concave die and related parts can work normally in the corresponding positions of the clamping die, and the workpieces that meet the product requirements are stamped out. , It should be mentioned that various components used for assembly need to meet the assembly process requirements proposed by various parts.

For example: for the fixing plate of multiple punches, the relative position dimensional accuracy and step distance accuracy between each type of hole must meet the requirements of the concave die and the discharge plate. The bolts and pins on the backing plate pass through the holes, which can be marked, Quenching, upper and lower surfaces should be strictly polished and flat. The overall concave die installed on the upper and lower die bases should not only meet the graphic requirements, but also process bolt holes and pin holes. After heat treatment and finishing to be put into assembly. Need to connect the fixed mold base. When assembling the guide plate, the screw holes and pin holes on the guide plate should be drilled through the corresponding holes on the die. With hinges; the mold type and structural characteristics of hardware stamping parts Although they are different, the assembly methods and installation sequences used are also different, but the assembly principles should be followed.

When assembling a die for metal stamping parts, first select the assembly base as the assembly benchmark for the metal stamping die, and then gradually assemble other die parts according to the benchmark components; the selection of the benchmark components depends on the structural characteristics of the metal stamping die; guide plate mold The frame should also be used as the guide plate of the unloading plate as the assembly reference part; the metal punching die guided by the guide column generally uses the concave die as the assembly reference part, and the blanking punching compound die selects the ejector plate as the assembly reference part, and the push plate is used as the assembly reference part. The premise is that the output center point is opposite to the center of the tie rod.

After selecting the reference parts, the parts of the metal stamping die are first assembled into assemblies according to their independent connection relationships, and then the base parts are used as the assembly benchmark to complete the assembly of the metal stamping parts.

What are the key points for debugging of metal stamping molds in the processing workshop?

1. Close debugging of metal stamping die. The die and the die should be matched to ensure their proper clamping height and opening height.

2. Debugging of the guide device. The guide column and guide sleeve must have good matching accuracy to ensure the stable and reliable movement of the metal stamping die.

3. Debugging of convex and concave die edges and gaps. The blade is sharp and the gap should be even.

4. Debug positioning equipment. The location should be precise and reliable.

5. Uninstall and uninstall the debugging of the device. The discharge and discharge should be smooth, and there will be no jamming.

The above is the relevant content about the assembly and debugging of the metal stamping part mold, the metal stamping part mold is a one-time production. Some parts that constitute the mold entity are processed separately according to the dimensions and tolerances marked on the drawings during the manufacturing process. Such parts are usually directly assembled. Some parts can only be dimensioned according to the drawings during the manufacturing process, and the relevant dimensions can be coordinated. . I hope the above can be helpful to readers.

Opel pressure sensor housing

Opel pressure sensor housing

1. Manufacturing process: stainless steel coil, deep drawing, deep drawing, redrawing, flat head chamfering

2. Scope of application: Opel stainless steel pressure switch, pressure sensor edging shell

3. Stamping material: stainless steel 304

4. Surface treatment: stainless steel brightener

5. Dimensions: Outer diameter is 36.2, inner diameter is 34.7, and height is 24. In addition, the dimensions can be customized according to your company’s requirements, and the unit price is negotiable.

6. Product features: no burrs on the end face, flat head chamfering, parallel and vertical cut surfaces, bright appearance

7. Quality: The production quality is strictly controlled, and the products are fully inspected before they are shipped. The products must be inspected before leaving the factory to ensure that every process meets the requirements and quality problems.

Quality comes from details, confidence comes from customers’ evaluation of our evaluation, in order to let you buy better products , strive to perfect every detail, from accessories to craftsmanship, are devoted to the pursuit of quality by Balfordpeople.

Fukang pressure switch housing

Fukang pressure switch housing

1. Manufacturing process: stainless steel coil, deep drawing, deep drawing, redrawing, flat head chamfering

2. Scope of application: Shenlong Fukang stainless steel pressure switch, pressure sensor wrapped shell

3. Stamping material: stainless steel 304

4. Surface treatment: stainless steel brightener

5. Dimensions: Outer diameter is 36.2, inner diameter is 34.7, and height is 24. In addition, the dimensions can be customized according to your company’s requirements, and the unit price is negotiable.

6. Product features: no burrs on the end face, flat head chamfering, parallel and vertical cut surfaces, bright appearance

7. Quality: The production quality is strictly controlled, and the products are fully inspected before they are shipped. The products must be inspected before leaving the factory to ensure that every process meets the requirements and quality problems.

Quality comes from details, confidence comes from customers’ evaluation of our evaluation, in order to let you buy better products , strive to perfect every detail, from accessories to craftsmanship, are devoted to the pursuit of quality by Balford people.

svc ford denso pressure suction control valve housing

svc ford denso pressure suction control valve housing

1. Manufacturing process: cold-rolled sheet coil, deep drawing, deep drawing, redrawing, extruding steps, trimming and punching

2. Scope of application: Ford Denso Delphi, regulating valve housing, solenoid valve housing, control valve housing, pressure valve housing, svc housing, vcv housing

3. Stamping material: cold rolled sheet dc04

4. Surface treatment: pickling, zinc-nickel alloy

5. Dimensions: Outer diameter is 30.5, inner diameter is 27, and height is 43.8. In addition, the dimensions can be customized according to your company’s requirements, and the unit price is negotiable.

6. Product features: there is no burr on the end face, the cut surface is parallel and vertical, and the appearance is bright

7. Quality: Strictly control the production quality, the products are fully inspected before they are shipped, and the products must be inspected before leaving the factory to ensure that every process meets the requirements and quality problems.

Quality comes from details. In order to let you buy better products, we strive to improve every detail. From accessories to craftsmanship, we are devoted to the pursuit of quality by Baford people.

What performance should metal stamping die processing have?

Metal stamping die processing should have the following properties:

Forgeability: low hot forging deformation resistance, good plasticity, wide temperature range, low tendency for forging cracking, cold cracking and network carbide separation.

Cutting technology: large cutting amount, small tool loss, and low surface roughness.

Processability: The spheroidizing annealing temperature range is wide, the annealing hardness is low, the disturbance generated is small, and the spheroidization rate is high.

Hardening: case hardening, case hardening, uniform surface hardness.

Hardening: After hardening, a deeper hardened layer can be obtained, and a mild quenching medium can be selected for hardening.

Abrasiveness: The relative loss of the grinding wheel is small, the limit of grinding without ablation is large, and it is not sensitive to the quality of the grinding wheel and cooling conditions, and the grinding fine blanking die will not be worn and cracked.

Oxidation method. Sensitivity to decarburization: At high temperature, the antioxidant absorber is good, the decarburization rate is slow, it is not sensitive to the heating medium, and pitting is easy to occur.

Casting mold manufacturing to go through cutting, heat treatment and other processes. The craftsmanship is difficult, the requirements for production materials are high, and good processing performance is required to ensure that the manufacturing of Seiko metal stamping dies has no process defects and stable quality.

Precautions for the selection of metal stamping parts:

1. There are many kinds of steel plate specifications, whether it is a fixed plate or a coil plate, the sales price is also different for the same material, thick material and different coil width. Therefore, in order to reduce costs, it is necessary to work hard on the setting of the purchase volume, and on the premise of ensuring the utilization rate of materials, try to choose a roll width range that does not increase the price. If you try to choose the appropriate size for the fixed-length plate, it is not necessary to carry out secondary cutting after cutting from the steel mill, so as to reduce the shearing cost; work efficiency.

2. The thickness of the plate has deviation requirements, generally within the allowable range of deviation, first select the plate with smaller deviation.

3. Determining the shape and size of the stamping parts display board is the premise of analyzing the deformation degree of the stamping parts, the design process and the preparation of the process specification. If the shape of the sheet is appropriate, not only the uneven distribution of the sheet along the sheet can be significantly improved, but also the forming can be improved, the height of the lug can be reduced, and the trimming allowance can be reduced. In addition, for some parts that are directly formed, if the shape and size of the sheet metal can be given, the number of mold adjustments can be reduced, thereby shortening the production cycle and improving productivity.

4. When selecting materials for product design, avoid excessive product performance due to the selection of high-grade materials. At the same time, under the premise of meeting product and process requirements, try to choose the materials and thick materials used in the existing mass-produced models to form a material platform to facilitate subsequent procurement and inventory management. For example, the main performance requirement of general cold-rolled sheet is tensile performance, so in the case of consistent product quality, try to choose low-specification materials. And in the selection of material thickness, in addition to considering the strength and weight after molding, we should also pay attention to the flatness of the material thickness. Due to the special thickness of raw materials, it is difficult and expensive for suppliers to supply.

The above is related to the selection of metal stamping dies and materials. For the processing of metal stamping parts, the shape of the stamping parts should be simple and the structure should be reasonable. In order to make the structure of the abrasive tool simple, our purpose is to use fewer and simple stamping parts for processing, which is beneficial to the stamping operation, not only can improve labor productivity, but also facilitate the organization and production of stamping parts, which is conducive to mechanized and automated production. Hope the above content can be helpful to readers.

What is the reason for the explosion of the metal stamping die?

First, choose the press

In order to prolong the service life of the metal blanking die, a high-quality punch should be selected. The average regrind life of the open press is 10,000-30,000 times, while the die life of the new precision press can reach 60,000-12,000 times. Especially for dies with small or no gaps, cemented carbide dies and precision stamping dies, presses with high precision and good rigidity should be selected, otherwise the service life of the die will be reduced, and the die will be damaged in severe cases.

2. Reasons for mold design

Usually, if the structure is unreasonable, the strength is insufficient, the distance between the knife edges is too close, the number of template blocks is insufficient, or there are no feet, etc., the mold will have a great risk of bursting. The mold design mainly includes the following:

1. Nesting and lap joint: The reciprocating feeding method often leads to damage to the mold, and the lap value is too small, which aggravates the wear of the mold. Therefore, choosing a reasonable layout method and overlapping boundary values ​​can prolong the life of the mold and avoid the situation of mold explosion.

2. Guide rail accuracy: The guide rail has high precision and reliability, which can reduce the wear of the guide rail and avoid the gnawing of the convex and concave die. Especially suitable for no gap, small gap blanking, compound, multi-station progressive die. In addition, according to the characteristics of the processing technology and the accuracy of the parts, choosing the correct form of guide and the accuracy of the guide mechanism is the key to improving the service life of the mold.

Third, the reason for the processing technology

The experimental results show that the thermal processing quality of the mold has an important influence on its performance and life. According to the analysis and statistics of failure causes, more than 40% of mold failure accidents are caused by improper heat treatment. In the manufacture of blanking die, improper quenching and tempering process will cause deformation of the finished product and eventually cause the die to burst.

1. Preheating heat treatment: According to different mold materials and requirements, operators should adopt preparatory heat treatment methods such as annealing, normalizing, and quenching and tempering to eliminate structural defects in forgings and improve the level of processing technology. In addition, proper preheating of the mold raw materials can make the carbide distribution more uniform, which is beneficial to ensure the quality of quenching and tempering, and prolong the service life of the mold.

2. Quenching and tempering: This is an important part of mold heat treatment. If the quenching temperature is too high, the brittleness of the mold will be strengthened, which will cause the product to be easily deformed and fractured during the cooling process, which will seriously affect the service life of the mold. Quenching and heating must be carried out in strict accordance with the heat treatment process regulations, with particular attention to oxidation, decarburization and other phenomena. If conditions permit, vacuum heat treatment can be used. In addition, tempering should be carried out in time after quenching, and different tempering processes should be selected according to technical requirements.

4. Surface strengthening treatment

In order to improve the performance and life of stamping dies, the surface strengthening treatment of die workpieces is more and more widely used. Common surface strengthening methods are liquid carbonitriding, ion nitriding, boronizing, vanadium and spark strengthening, chemical vapor deposition (CVD), physical vapor deposition (PVD), carbide immersion in a salt bath (TD) In addition, surface strengthening treatments such as high-frequency quenching, hydraulic pressure, and shot peening can generate compressive stress on the surface of the mold workpiece, improve its fatigue strength, and help prolong the service life of the mold.

The above is the content related to metal stamping dies. The selection of stamping equipment is directly related to a series of important issues such as equipment safety, production efficiency, stamping quality, punching die life and production costs. Therefore, careful selection is required. Hope the above content can be helpful to readers.

Stamping dies, protective measures for stamping operations

The main reason for the formation of the mold is: the mold is misguided and skewed. Otherwise, it will cause mold damage and mold deformation, such as mold base, template hardness, template thickness planning is too small, easy to be affected by external force collision deformation; mold orientation is not correct, the upper and lower mold positioning error is out of tolerance. At this time, the strength of the punch should be increased to strengthen the guidance of the stripper. It may also be that the precision of the die is too low, resulting in a dryness of the die that is not proportional to the strength of the die. The orientation of the mold is too close, causing the lateral force of the mold to be unbalanced. When stamping, once the mold is insensitive or even stuck, stop production immediately, find out the cause of the stuck mold, and eliminate the problem.

The cost of mold production is high, and the cost of ordinary molds accounts for 1/4-1/5 of the cost of stamping molds. The cost of a trim is more than 70% of the original cost of the mold, and the life of the mold may be approaching. If the mold repair process is too complicated, the mold repair cost is too high, the difficulty is too high, and the maintenance cycle is too long, it will seriously affect the normal production of stamping parts.

Under normal circumstances, after the mold is damaged, there will be a multiple-choice question to repair and invalidate it. However, in this way, the mold can be repaired in time, effectively avoiding damage to the mold, and can greatly reduce the cost of the mold for stamping production. After the die sleeve is seriously damaged, sometimes the punch and the die are damaged together. The reason is that, in addition to the difficulty of mold manufacturing, the cost is too high. Unnatural wear of the blanking die fails, if not for damage to the connecting parts.

Under normal circumstances, the main failure mode of the die is excessive wear, which requires the manufacture and use of the die again. Therefore, timely repair and prevention of molds can greatly reduce the cost of molds for stamping parts.

In addition, some protective technical measures should be adopted during the stamping process:

1. The protection of the stamping work area of ​​the stamping parts processing factory.

1. Install protective devices around the die.

2. The die is properly designed, and the die reduces the danger range.

3. Automatic or mechanical feeding design.

Second, stamping parts processing factory anti-punch protection measures.

1. Pushing hand: a protective device that is connected to the slider of the punch press and uses the swing of the baffle to push the worker’s hand out of the die mouth.

2. Swing rod protection device: a device that uses the lever principle to pull the hand.

3. Handle protection device: It is a device that uses pulleys, levers and ropes to make the hands of the staff and the slider move in conjunction.

The above is the related content of stamping die problems and protective measures. The role of die in stamping process cannot be ignored. Only by doing a good job in relevant protection work and solving problems in time can we reduce costs and improve efficiency. Hope the above will be helpful to readers.

Metal stamping parts processing, stamping parts stretch forming method

Products are drawn using stamping equipment including:

1. Tension treatment:

The plate pressing device uses the punch of the punch to pull part or all of the plate into the die to make it a bottomed container. For the drawing process of a conical (or pyramidal) container, a hemispherical container, a parabolic container, etc., the side walls thereof are parallel to the drawing direction, and the expansion process is also included.

2. Pull back processing:

That is to say, for a deep-drawn product that cannot be completed by one-time drawing, after the drawing process, the formed product needs to be drawn again to increase the depth of the formed container.

3. Reverse drawing processing:

Use the tension punch in the previous process to pull back, so that the inner wall of the workpiece becomes the outer side and the outer diameter is reduced.

4. Thin stretch processing:

The shaped container is extruded through a punch into a female cavity that is slightly smaller than the outer diameter of the container, thereby reducing the outer diameter of the container with the bottom, reducing the wall thickness, eliminating offset, and allowing the surface of the container to smooth.

Precautions for processing of pressed and drawn parts

1. The shape of the metal stamping and drawing die should be as simple and symmetrical as possible, and it should be stretched at one time.

2. For parts that need to be stretched many times, under the premise of ensuring the necessary appearance quality, there should be possible stretch marks on the appearance.

3. In order to ensure the installation requirements, the side wall of the extension piece should have a certain inclination angle.

4. The distance between the bottom surface of the telescopic piece or the hole edge of the flange and the side wall should be appropriate.

5. The bottom-wall surface, flange and wall surface of the drawing piece, and the radius of the four corners of the rectangular part should be appropriate;

6. The ruler, inner and outer shape of metal punching and drawing parts cannot be uniformly marked.

The above content is related to the processing of metal stamping parts. In fact, in the final analysis, the quality and performance of the stretched parts are the key, and the later use is also a basic principle. Of course, in the process of processing and production, the product will not have any defects, what we have to do is to reduce these failure rates to a very small amount. Thereby, the production efficiency of the stretched parts is improved. Hope the above content is helpful to readers.

What types of stamping dies are important for stamping parts processing?

The production process of stamping die is the whole process of processing raw materials into stamping die parts required by design drawings through casting, forging, cutting and special processing, and then assembling the die according to technical requirements such as design and process procedures. Stamping die is an indispensable die in stamping production. Stamping dies can be basically divided into simple dies, continuous dies and composite dies.

1. Simple die

A simple die can complete a process with only one punch in the punch. That is, the simple die for blanking or punching, when the assembly drawing of the simple die is working, it is fed along the two guide plates 9 on the die and hits the positioning pin 10 . When the sheet is pressed down, the stamping (or scrap) enters the concave hole and the strip is clamped and up together with the punch. After the strip material contacts the discharge plate (fixed on the die), it is pushed down, so that the strip material continues to enter, and the above steps are repeated to flush out the second one.

2. Continuous casting mold

In one stroke of the stamping machine, the die is called a continuous die, in which multiple stamping processes are done simultaneously in different parts of the die. In operation, the DING pin 2 is aligned with the pre-punched positioning hole, the upper die moves down, the punch 1 is blanked, and the punch 4 is punched. When the upper die returns, the stripper plate 6 pushes out the rejects from the punch. At this time, the blank 7 is advanced again, and the second punching is performed. In this cycle mode, the distance of each feed is controlled by the baffle pin.

3. Double die

In one stroke, a die that completes several punching holes in the same die at the same time is called a compound die. The biggest feature of the combined mold is that there is a punch 1 in the mold. The outer circle of the punch and concave die is the cutting edge of the blanking punch, and the inner hole is the deep drawing die. When the slider moves along the convex and concave die and down, the strip falls into the concave and convex die 1 and the blanking die 4. The blanking part is held up by the drawing punch 2 in the lower die, and when the slider continues to move downward, the die moves downward to draw deeper. The ejector 5 and the discharger 3 push out the die by stretching 9 when the slider returns, which is suitable for the compound die of mass and high-precision stamping parts.

The research and development of this simple die has important practical value for cold stamping production. The reason is that compared with simple molds, it has fast production time and low manufacturing cost, which provides a more economical and effective way for trial production of some new products and mass production of stamping parts with low requirements.

Stamping die is an indispensable process equipment for stamping production. It is a technology-intensive product. The quality, production efficiency and production cost of stamping parts are directly related to the design and manufacture of molds.

As one of the important indicators to measure the level of product manufacturing in a country, the technical level of mold design and manufacturing determines the quality of the product to a large extent. advantages and new product development capabilities.

What are the types of stamping dies mentioned above that are important for stamping parts processing? Related content, in modern industrial production, various molds are widely used in production. Mold is an important process equipment for casting, forging, stamping, plastic, rubber, glass, powder metallurgy, ceramics and other industries. I hope the above is helpful to readers.

Solenoid valve stainless steel magnetic guide sleeve

Solenoid valve stainless steel magnetic guide sleeve

1. Manufacturing process: stainless steel coil, deep drawing, deep drawing, redrawing, flat head chamfering

2. Scope of application: Inner cover of solenoid valve for fuel pump, magnetic isolation sleeve of solenoid valve, magnetic guide sleeve of solenoid valve, which play a role of magnetic permeability and fixation

3. Stamping material: stainless steel 304

4. Surface treatment: stainless steel brightener polishing, vacuum annealing and degaussing

5. Dimensions: Outer diameter is 21.1, inner diameter is 20.2, and height is 21. In addition, the dimensions can be customized according to your company’s requirements, and the unit price is negotiable.

6. Product features: no burrs on the end face, flat head chamfering, parallel and vertical cut surfaces, bright appearance

7. Quality: Strictly control the production quality, the products are fully inspected before they are shipped, and the products must be inspected before leaving the factory to ensure that every process meets the requirements and quality problems.

Quality comes from details. In order to let you buy better products, we strive to improve every detail. From accessories to craftsmanship, we are devoted to the pursuit of quality by Balford people.

Car electric sliding door motor housing

Car electric sliding door motor housing

1. Manufacturing process: 53d galvanized sheet, deep drawing, deep drawing, redrawing, trimming and punching

2. Scope of application: universal motor housing for automobile electric sliding door sliding door

3. Stamping material: galvanized sheet 53d

4. Surface treatment: degreasing and color retention

5. Dimensions: Outer diameter is 43, inner diameter is 38, and height is 68. In addition, the dimensions can be customized according to your company’s requirements, and the unit price is negotiable.

6. Product features: no burrs on the end face, flat head chamfering, parallel and vertical cut surfaces, bright appearance

7. Quality: Strictly control the production quality, the products are fully inspected before they are shipped, and the products must be inspected before leaving the factory to ensure that every process meets the requirements and quality problems.

Quality comes from details. In order to let you buy better products, we strive to improve every detail. From accessories to craftsmanship, we are devoted to the pursuit of quality by Balford people.

Electric sliding door motor housing

Electric sliding door motor housing

1. Manufacturing process: galvanized sheet coil, deep drawing, deep drawing, redrawing, trimming and punching

2. Scope of application: Electric push door motor, sliding door motor, sliding door motor shell, general purpose

3. Stamping material: galvanized sheet 54d

4. Surface treatment: electrophoresis treatment of galvanized sheet

5. Dimensions: Outer diameter is 42.38, inner diameter is 38, and height is 68. In addition, the dimensions can be customized according to your company’s requirements, and the unit price is negotiable.

6. Product features: no burrs on the end face, flat head chamfering, parallel and vertical cut surfaces, bright appearance

7. Quality: Strictly control the production quality, the products are fully inspected before they are shipped, and the products must be inspected before leaving the factory to ensure that every process meets the requirements and quality problems.

Quality comes from details. In order to let you buy better products, we strive to improve every detail. From accessories to craftsmanship, we are devoted to the pursuit of quality by Balford people.

How to deal with common problems in the processing of drawing molds?

1. In terms of the original data of the molded workpiece, after the appearance processing of the original data, such as phosphating, spraying or other appearance processing, the appearance of the molding data forms a layer of non-metallic mold, which can greatly reduce or eliminate the strain of the workpiece. . This approach is often costly and requires additional production equipment and production processes. While this method is sometimes effective, it is rarely used in actual production.

2. Adding a layer of polyvinyl chloride and other films between the metal parts and the mold, between the mold and the forming data can sometimes solve the problem of workpiece strain. For the production line to continuously supply the film through the organization, for the stamping equipment for periodic production, each production part needs to add the film, which affects the productivity. The overall cost of this method is also high and a lot of waste is generated. This method can be used for the production of small batches and large workpieces. In the case of very small forming load, sometimes lubricating oil or lubricating oil with EP additives can solve the problem of workpiece strain.

3. In terms of mold, the mold is convex. Die data or die convex. Manipulate the appearance of the die or select the appropriate die data to change the nature of the contact between the drawing data and the punch. Practice has proved that this is an economical and practical strain treatment method, and it is also a method widely used at present. To sum up, deal with deep drawing and workpiece as well as die convex. There are many ways to strain the appearance of a die. For detailed cases, the selection should be based on artifacts and negative sizes. mass production. Type of processing data, etc.

The shape of the drawing piece is complex and diverse, and the dimensional accuracy is required to be high. The processed product is on the same level as the cut product, and the processed cut surface is flat. It’s very smooth and bright. It is more difficult to machine than other crafts. It can process gear fine-blanking parts with small modulus and high precision, and the drawn parts have clear outline and small slump angle. Drawing parts mainly rely on the pressure of the press to process metal or non-metal data through the die. The workpieces processed by drawing parts have high precision and can reach the micron level. Compared with other workpieces, it has the advantages of light weight, thin thickness, uniform distribution and strong pressure resistance. In the process of processing, large-scale production, shortening processing time, one-time molding, no need for other processing. Mainly used in automobile brakes, automobiles, motorcycles and other products. It is an economical and fast electromechanical product.

Let’s popularize some questions about stretch pieces so you can gain some expertise by learning to understand them clearly.

1. Blanking – deep drawing, suitable for shallow drawing or deep drawing?

Blanking-Drawing is suitable for shallow drawn parts, because the steel plate is compressed during blanking and the steel plate is also compressed during deep drawing. Therefore, on this basis, the above-mentioned corresponding theory will appear. There is no doubt about that.

2. How to roll the thread on the stretched part?

In this case, in the opinion of the manufacturer of stretched parts without Xizhongnan lighting fixtures, because it is not applicable, the general rolling method cannot be used, but a mandrel is first passed through the stretched part, and then the rolling can be successfully completed operate.

3. How to prevent the stretched parts from pulling?

In order to prevent hair problems in stretched parts, there are approaches we can take that may be noticed. The main points are as follows:

First, the die used has a smooth appearance and should be smooth when drawing.

Second, the hardness of the mold material should not be too low.

Third, do a good job of cleaning the stretched parts, and there should be no dust and dirt.

For stretched parts, the above problems can be said to be very important and basic. I have never done it before. I hope everyone can study and understand carefully, so as to master them in time, and gain something, develop, and develop in the process of product learning. Breakthrough.

The above is about the processing dies of stretched parts, as well as some common sense of the processing of stretched parts. Many customers actually know a little when they choose the manufacturer of stretched parts, so it is easy to be ignored in many professional issues. But this is the professional side of the tensile parts processing factory, and it is recommended to choose carefully. Hope the above content can be helpful to readers.

What are the types of processing shapes of stainless steel drawing parts?

Simply put, drawing is a stamping method in which a flat blank is formed into an open hollow part with a die. Thin-walled parts with irregular shapes such as cylindrical, rectangular, stepped, spherical, conical, and parabolic shapes can also be combined with other stamping processes to produce parts with more complex shapes.

According to the characteristics of deformation mechanics, stainless steel tensile parts can be divided into box-shaped parts (straight-wall non-rotating body), circular simple-shaped parts (straight-wall rotating body), surface-shaped parts (referring to curved surface rotating body) and non-rotating surface forming Components. It is characterized by:

First, the deformation characteristics of cylindrical parts.

In the deepening process, the deformation area is the blank flange edge, and the other parts are the force transmission area, which does not participate in the main deformation; under the action of tangential compressive stress and radial tensile stress, the blank deformation area produces tangential compression and radial tension. The deformation of the extension; the extreme deformation parameters are mainly limited by the bearing capacity of the blank force transmission area.

Second, the deformation characteristics of the box.

Its deformation properties are the same as for circular simplified parts. The difference is that the deformation that is always stretched and compressed is unevenly distributed around the blank, the rounded corners have large deformation, and the straight edge has small deformation; there is an interaction between large and small deformations around the blank.

3. Deformation characteristics of curved surface shape parts.

The periphery of the blank is the tensile deformation area that has been under compression, and the middle of the blank is the expansion deformation area of ​​bidirectional tensile stress.

4. Deformation characteristics of non-rotating body curved parts.

The deformation area of ​​deepening the blank is also composed of the outer deepening deformation area and the inner expansion deformation area, but the distribution of these two deformations around the blank is uneven; when the flange edge of the surface is partially deepened, the deformation area around the blank also has shearing deformed.

The above is the processing appearance type of stainless steel drawing parts. In the processing of drawing parts, quality is an important issue that cannot be ignored. No matter what type of drawn part, material, process and die are important factors that affect the deep drawing process. Hope the above content can be helpful to readers.

What are the factors that affect the quality of drawing die processing?

1. Materials: Good materials are half the battle. Stretching cannot be ignored. Cold rolled steel plate is mainly composed of 08Al.08.08F.10.15.20 steel, of which 08 steel is the most widely used, divided into boiling steel and killed steel. The price of boiling steel is low and the surface quality is good, but the segregation is serious and there is a tendency to adapt to aging. Not suitable for parts with high stamping performance and strict appearance requirements.

2. Determination of blank size: The blank diameter of a simple rotating body drawing part does not become thinner during the drawing process. Although the thickness of the material has changed, it is basically very close to the original thickness. It can be calculated according to the principle of the area of ​​the blank and the area of ​​the drawn part (if there is trimming, the trimming allowance must be increased. However, the shape and process of the deep-drawn part are often complicated, sometimes thinning and stretching. Although there are many three-dimensional The software can calculate the material, but its accuracy is less than 100%.

The solution: material testing. A product part should go through multiple processes, the first of which is usually the process of material transportation.

First perform material calculations to have a rough idea of ​​the shape and size of the blank to determine the overall dimensions of the material delivery die. After the mold design is completed, do not deal with the convex and concave die dimensions of the material conveying die. First use wire cutting and machine the blanks (when the blanks are large, they can be milled with a milling machine and then repaired). After trial and error in the subsequent stretching process, half the size of the feed conveyor die was finally determined.

3. The drawing coefficient m is one of the main process parameters in the calculation of the drawing process, and is often used to determine the drawing sequence and drawing times. There are many factors that affect the elongation coefficient m, including the properties of the material. The relative thickness of the material. Drawing method (with or without a blank holder). number of stretches. stretching speed. Punch and concave die fillet radius. The calculation and selection principle of the tensile factor m is the focus of introduction in various stamping manuals, including calculation. View the form. calculation and many other methods.

The relative thickness of the material. Drawing method (with or without a blank holder). In the process of mold repair, the number of stretches is not easy to adjust, so be careful! When you choose the stretch factor m, it is better to find another colleague. Grease the concave die or place a film bag on the sheet.

4. When stretching and cracking, apply lubricating oil on the die (do not apply it on the punch), and cover the plastic film of 0.013-0.018 mm with the die.

5. During the stretching process, due to the cold plastic deformation, the parts are cold hardened, the plasticity is reduced, the deformation resistance and hardness are increased, the mold design is unreasonable, and intermediate annealing is required to soften the metal and restore the plasticity. Note: annealing is not necessary in the general process. After all, in order to increase the cost, choose to increase the process and increase the amount of annealing, and use it with caution! Annealing generally adopts low temperature annealing, that is, crystallization annealing.

Two points should be noted during the annealing process: carbon and oxidation. It’s mostly about oxidation. Oxidized skin has two hazards: thinning the effective thickness of the workpiece and increasing die wear. When the company’s conditions are not met, ordinary annealing is generally used. To reduce the production of oxidized skin, the furnace should be filled as much as possible during the annealing process. I also used the soil method: 1. The workpiece can be mixed with other workpieces (premise: the annealing process parameters should be basically the same) 2. The workpiece is put into the iron box for welding, and then the electric furnace is installed. To eliminate scale, the furnace should be filled as much as possible during the annealing process.

When the company conditions are met, nitrogen furnace annealing, that is, bright annealing, can be used. Don’t look closely, it’s almost the same color as it was before annealing. Add the intermediate annealing process when there is no other way to deal with cracks in cold-hardened metal or die tests.

The above is about the mold processing of the drawn parts. When judging the cause of cracks in the processing of tensile parts, it can be referred to: the cracks caused by poor material quality are mostly serrated or irregular in shape, and the cracks generated by the process mold are generally neat. To ensure wear resistance and prevent tensile scratches, punches and dies and blank holders must be hardened and, if necessary, plated with hard chrome. Hope the above content can be helpful to readers.