What are the advantages of cold stamping?

First, the advantages of cold stamping

The production process of the hardware processing factory for processing metal stamping parts is the cold stamping process. Cold stamping is based on the plastic deformation of metal. Dies on a press are used to apply downward pressure to a metal sheet or strip, separating or plastically deforming the material to achieve the desired shape, size and properties. For advanced stampings, this pressure treatment method is cold stamping.

Since the cold stamping process is a plastic deformation process, the surface of the material is not damaged, so the surface quality of the stamped parts is good, and the appearance is smooth and beautiful. This is a variety of surfaces, such as painting on the surface of stamping parts or various electroplating phosphating treatments. Provide convenience for processing, which is the main advantage of cold stamping hardware.

After the plastic sheet is deformed, the internal structure of the metal is improved, increasing the strength of the stamped part. There are two main advantages of stamping.

The third advantage of hardware cold stamping is that the dimensional accuracy of the stamped parts after processing is higher, which is opposite to the size of the die parts and has good interchangeability. Routine assembly and use requirements are met without further processing.

Whether the shape structure is a pure part or a complex hardware part, or how many sets of molds are required, it is mass-produced and can replace the high cost of molds.

Cold stamping is a processing method with high efficiency (ie high productivity) and low consumption (ie high material utilization): the cold stamping process is suitable for the production of large-scale parts, easy to realize mechanization and automation, and has high production efficiency. At the same time, cold stamping can not only achieve low-waste or no-waste production, but also make full use of leftovers without causing waste.

Under the simple stamping of the press, various parts with complex shapes that are difficult to be processed by other processing techniques can be obtained.

Since most stamping parts are made of sheet metal, their surface quality is good, which provides convenient conditions for subsequent surface treatment processes (such as electroplating, painting, etc.).

Stamping can obtain high strength, high rigidity and light weight parts with low consumption.

What are the requirements for the materials for metal stamping processing?

When selecting the material of stamping parts, the metal stamping manufacturer must not only tap the function of use, but also write out the functional requirements of stamping processing and subsequent processes. What are the requirements for stamping materials for metal stamping parts?

1. Stamping parts have good stamping forming function.

For forming processes, such as stretching, bending, pitch difference, convex hull, etc. The material should have good stamping and forming function, that is, it has good crack resistance and good fit, otherwise the product will be easily deformed, broken, etc., making it difficult to repair the mold. For individual processing, a certain plasticity is required.

2. Do stamping parts have high nominal characteristics? The nature of the material should be flat and smooth, and its integrity is at risk. The material properties are good, it is not easy to break during molding, the mold is not easy to wear, and the quality of the parts is good.

3. The thickness of the stamping parts must meet the national standards.

Since a certain mold is only suitable for materials within a certain thickness range, if the thickness of the material is too small but too large, it will not only affect the quality of the parts, but also lead to the appearance of the product. In the process of proofing, trimming, etc., due to the large positive deviation of the thickness, it is easy to cause damage to the mold or the press.

The hardness test of the metal blanking material is important to determine whether the purchased sheet metal annealing degree is suitable for the subsequent stamping processing.

The industry calls stamping presses sheet metal forming, but there are some differences. Slab forming refers to the processing technology of slab, thin-walled tube, thin steel, etc. as raw materials, which is collectively referred to as sheet forming. In this environment, the deformation in the direction of the thick plate is usually not considered.

The above is about the relevant content of metal stamping parts processing materials. Generally speaking, the advantage of metal stamping parts processing is the metal stamping process. Because the surface of the material is not damaged, the surface quality is good, the surface is smooth and beautiful, and the metal surface is painted, electroplated, and waiting for the surface. Punishment is facilitated. Hope the above will be helpful to readers.

Material selection and characteristics and advantages of stamping die

1. Material selection of stamping die

The material types of stamping dies include steel, cemented carbide, steel-bonded cemented carbide, zinc-based alloys, low melting point alloys, aluminum bronze, polymer materials, etc. At present, the materials of stamping die are mainly steel, low alloy tool steel, high carbon and high chromium, medium carbon alloy steel, high speed steel, basic steel, hard alloy, steel bonded hard alloy, etc.

The material of the stamping die should have high hardness, strength and wear resistance, but also need appropriate toughness and high hardenability. In order to ensure the service life of mold products, it is necessary to select raw materials according to the use of molds, stress conditions, production batches, production efficiency and working conditions.

Second, the characteristics and advantages of stamping die

1. The number of parts completed by the stamping die per unit time is several times, even hundreds to thousands of times that of the general processing method. In addition, a set of dies can be stamped to further improve production efficiency.

2. The products produced by stamping die have the characteristics of stable quality, strong mechanical properties, compact structure, good interchangeability, good wear resistance, convenient maintenance and mass production.

3. The material utilization rate of the stamping die is high, and various layout methods such as cross, oblique, multi-row, mixing, and nesting can be adopted, which can reduce the cost of product materials.

4. Under normal circumstances, there is no need to heat the material during the stamping process, which not only saves energy, reduces the occupation of heating equipment and venues, but also avoids the oxidation, burns and deformation of the product surface caused by heating.

5. Stamping dies are widely used, which can solve the operations that cannot or are difficult to be completed by general processing methods, and are especially suitable for the processing of thin, soft, difficult and micro parts.

Finally, the processing process of stamping dies is very simple, the technical requirements for operators are not high, and the labor intensity is low. After receiving short-term job training, workers can start to operate. And during the operation, the basic movements of the workers are the same and are not affected by the complexity of the product.

What are the common problems in mold design and processing?

1. Why does the mold turn over less frequently?

In the process of making the mold, too much silicone oil is added, and the silicone oil destroys the molecular weight of the silicone, so the number of times the mold is turned over is small and not durable. If it is said that small products with complex patterns are used to open the mold with silicone with high hardness, there will be a phenomenon that the number of mold turning is less, because the time when the silicone is too hard will be very brittle and easy to break. On the contrary, if the mold is made of silicone with less hardness, the result is not satisfactory. Since the silicone is too soft, its tension and tear strength will decrease, and the mold will deform, so the number of flips will decrease. The quality of the mold glue itself is very good, and the silicone is not good or bad, only suitable or not. This does not happen when we make molds with silicone that is suitable for the hardness of the product.

2. Why does the mold burn out?

Since the unsaturated resin and resin products are added with peroxide curing agent, the resin reaction will generate a lot of heat. The resin curing time is generally 3 minutes, and the mold is released as soon as possible after 3 minutes to prevent the phenomenon of silicone mold burning.

3. The method of filling the mold and the production method of the slicing mold

The operation method of the slicing mold or the slicing mold: brush or pour the vacuum silica gel for construction. If you are making a sheet mold or a split mold and using the brushing method, apply a layer of release agent or release agent to the product or model to be replicated before painting, then apply silicone to the product and wait 30 minutes. Apply a layer of gauze or fiberglass cloth to the surface for strength, then apply a second layer of silicone. After the silica gel is dried, the outer mold is made. The outer mold can be made of materials such as plaster or resin.

The operation method of the pouring or pouring mold: the pouring or pouring mold is used for smooth or simple products, that is, the product or model to be copied is surrounded by a plastic or glass plate, and the vacuum silicone is directly poured into the product. After the silica gel is dried and formed, the product is taken out and the mold is formed. The above is the whole process of mold use and operation.

4. Why does the mold appear dry on the outside and not dry on the inside?

The mold is a condensed silicone that cures by absorbing moisture from the air. Silica gel evaporates water during the production process, and this happens without adding an appropriate amount of water.

5. Why does the mold have poor tensile force?

Because in the process of making the mold, in order to reduce the viscosity of the silica gel and make the silica gel easy to handle, a large amount of silicone oil is added to the silica gel to make the silica gel very soft, resulting in the phenomenon of intolerance, reduced tear strength, and poor tensile force. , resulting in the phenomenon that the mold is not durable, the service life is short, and the number of mold turnovers is small.

6. Why does the mold appear oily?

The mold itself will not emit oil, because the complex silicone oil (silicone oil and white mineral oil complex) is added during the operation, because the white mineral oil is a petrochemical product, not a silicone oil.

7. Why does the mold made by the mold have traces, streaks, and unevenness on the surface?

This phenomenon occurs why the product or model to be reproduced is not ground or polished. Because in fact, the model or product itself is not smooth or perfect, if the product or model to be reproduced is not sanded or polished, no matter how good the mold made of silicone, it will not be beautiful and smooth. Another situation is that when removing the mold, uneven brushing can also cause the mold to be uneven.  

What are the basic operation methods of stamping parts processing?

First, the basic operation of stamping parts processing

The transformation of the metal stamping parts processing equipment has effectively improved the production safety and reliability of the factory. At present, the operating systems of many old hardware stamping equipment in China are not very skilled, and there are many unsafe factors in electrical control systems and equipment. If we continue to use them continuously, we will continue to carry out corresponding technical transformations. Stamping equipment manufacturers must improve product design in order to ensure the safety and reliability of stamping equipment.

Professional metal stamping parts processing technology, molds and operation methods better realize the factory’s manual work outside the mold. For large-scale production operations, efforts can be made to reform the process and improve the mold to better realize mechanization and automation.

Install guards as much as possible. Due to the small production batch of products, safety protection devices can be installed to prevent injury accidents caused by operational errors in stamping operations that cannot be automated and cannot use safety stamping tools. All kinds of protective devices have their own different scopes and characteristics. Improper use will still cause injury accidents.

Metal stamping parts are more and more widely used, and the processing of metal stamping parts is mainly formed by processing metal sheets and forming stamping process molds. The stamping parts produced by metal stamping parts manufacturers can better have uniform, light and thin. , strong and other excellent characteristics, and its very high precision, the same specifications and so on.

Introduction to stamping parts

Hardware stamping is a kind of metal processing parts, which can be processed by stamping, bending, stretching and other ways. Stamping is a widely used metal processing technology, which has high efficiency and can achieve mass production. According to different application fields, stamping parts can be divided into automobile stamping parts, electronic stamping parts, medical stamping parts, etc. Next, Yiwei Precision will introduce the stamping process of the stamping die:

Generally speaking, the basic equipment of the stamping factory includes various auxiliary equipment such as shearing machine, numerical control punching machine/laser, plasma, water jet cutting machine, bending machine and uncoiler, leveling machine, deburring machine, spot welding machine, etc.

Generally, the three most important steps in a stamping die factory are cutting, stamping and folding.

Stamping parts are sometimes called metal wrenching. Generally, the metal sheet is pressed by hand or with a mold to produce plastic deformation to form the required shape and size, and it can be further welded or slightly machined. More complex parts (such as chimney, iron stove and commonly used car shell) are all sheet metal parts.

Stamping parts processing is called sheet metal processing. For example, use plates to make chimneys, iron drums, oil tanks and oil pans, ventilation pipes, etc. The main processes are shearing, punching and bending, bending, welding, riveting, etc., which requires some geometric knowledge. Modern sheet metal processes include: laser cutting, metal bonding, metal wire drawing, plasma cutting, rolling, sheet metal bending, die forging, water jet cutting, precision welding, etc.

Selection of stamping process plan

A stamping part usually has many stamping process plans to choose from. If you want to choose a good scheme, you should consider all factors comprehensively, and then choose a suitable one that is more reasonable in technology and economy. Zhejiang Balford Precision Stamping Co., Ltd., a manufacturer with rich experience in stamping and precision stretching, come to talk about it.The best processing scheme for stamping parts is always relative; This is related to the specific production conditions of the stamping factory. Therefore, when determining the stamping process plan, we should start from the existing production conditions, ensure the quality of stamping products and meet the production batch requirements, and complete the stamping process in an economical and reasonable way.

In addition, for some combined stamping parts or stamping parts with special requirements, after analyzing the process nature, quantity sequence and process combination mode of stamping parts processing, non stamping auxiliary processes, such as drilling, turning and other mechanical processing processes, welding, riveting, heat treatment, surface treatment, cleaning and deburring, should also be considered.

Deep Drawing Metal Stamping

Metal parts are essential in the construction and construction of medical devices. They must have high precision, durability and biocompatibility for internal and external use. Due to its huge versatility, metal stamping allows the medical industry to rapidly and efficiently produce and improve these tools.

One of the most powerful applications of metal stamping is the production of implantable medical device parts, which must maintain their shape and be very easy to disinfect.

In addition, this process provides a good way to produce customized options. Metal stamping adds a wide range of standard and custom medical devices, such as:

Battery pack.

Shield and half shell.

Capacitor element implantable cardioverter defibrillator.

Stamped and machined seals, seals and joints.

Neuromodulation project.

Implantable cardiac pacemaker.

Ventricular assist device.

Implantable drug infusion pump.

Implantable hearing aids.

Heju Stamping has developed a variety of products for the medical market. Our most unique products include:

Equipment chassis.

All permanently implanted medical devices, including cardiac pacemakers, cochlear devices, cardiac defibrillators, and drug pumps, are made of titanium. Titanium is the only metal that the human body will not reject.

Implantable components.

The implantable components include the external shielding of the device, the battery housing, and other components. By designing and manufacturing custom molds, Heju stamping uses metal stamping technology to manufacture parts for various purposes, which are cheap and fast.

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What are the factors that affect the processing quality of metal drawing parts?

1. Material selection

Various materials have different tensile properties. The ratio of blank diameter to punching diameter is the ultimate drawing speed. Stainless steel ranges from 1 to 2.2, carbon steel from 2.15 to 2.5. In addition to heat treatment, stainless steel materials can also be subjected to secondary stretching, but unlike carbon steel materials, stainless steel materials generally cannot be stretched like the first time except for heat treatment. Stretch like that. Stainless steel pipe needs to be one to two times larger than carbon steel. In general, double-acting deep-drawing hydraulics are preferred.

Second, choose lubricating oil

The choice of lubricant should consider two factors. A scratch-resistant and friction-reducing oil film must be provided. Plus, it’s easy to remove all of it once the deep flush is done. It can contain chlorinated or sulfurized oils or waxes, heavy washes or deep soaps. Deep drawing is a method of forming cylindrical or box-shaped hardware from a ring or metal die screwed into a thin sheet of metal material. Commonly used gold materials are stainless steel, aluminum, iron, copper, etc. Metal deep flush products are available in different heights.

If there is a deviation in the stretch, what is the reason?

For blanking parts, if the punching size deviates, the specific reason is that there is a problem with the mold structure design or product material. Also, there may be a problem with the device. In this regard, we should investigate one by one to find out the real cause, fundamentally solve the problem, and prevent it from happening again.

The dimensional accuracy of drawn hardware parts refers to the difference between the actual size and the design size of the stamping part. The difference is small and the precision is high. Ideally, the punched and die edges are the same size, and the punched and punched edges have the same size. In fact, due to the force on the workpiece during the blanking process, a certain elastic deformation will occur.

After blanking, the elastic recovery of the workpiece leads to the mismatch of the dimensions of the blanking part, the die edge part, the punching part and the punching part, which affects the precision of part of the metal blanking. In addition, there are many factors that affect the dimensional accuracy of stamping parts, such as blanking gap, mold manufacturing accuracy, material properties, stamping part thickness, shape, size, etc.

The most important thing is the blanking gap. Because the gap between the punch and the mold is too large, the stretching effect on the material is large during the blanking process, so the tensile deformation is large. Due to the rebound after blanking, the size of the blanking part is reduced, and the size of the punched part is increased. If the gap is too small, the material will be compressed due to the extrusion of the punch and die. Due to the elastic recovery of the material, the size of the stamping part increases and the size of the stamping part decreases.

The above content involves the processing of hardware products, and the dimensional accuracy of the final stamping parts is also related to the characteristics and thickness of the material. However, for the general stamping parts manufacturer, due to the small variation in material thickness, such conclusions and explanations can be drawn. I hope the above will be useful to readers.

How to check hardware precision shrapnel?

Hardware precision shrapnel is everywhere in life. It is a mechanical part that uses elasticity to work. Usually made of metal shrapnel steel. Hardware precision shrapnel is used to control the movement of machine parts, severe shock or vibration, store energy, measure force, etc. Hardware precision shrapnel is widely used in machine and appearance. There are many kinds of hardware precision shrapnel. Divided by shape, there are mainly spiral metal shrapnel, reel metal shrapnel, flat metal shrapnel, etc.

First, the method of checking the hardware shrapnel

Touch Check: Wipe the surface of the cover with a clean gauze. Inspectors should wear touch gloves and touch the surface of stamping parts longitudinally. This inspection method depends on the inspector’s experience. If necessary, you can sand the suspicious area with a whetstone and verify it, but this method is an effective and quick way to check.

Polishing with elastic gauze: Wipe the surface of the cover with a clean gauze. The flexible sand screen is used to stick to the surface of the stamping part, and it is polished to the entire surface in the longitudinal direction, and any pitting and indentation can be easily found.

Oiling check: Wipe the surface of the cover with a clean gauze. Then use a clean brush to evenly coat the entire surface of the metal stamping in the same direction. Check oiled stampings under bright light. It is recommended to erect the stampings in the direction of the body. With this method, it is easy to spot small pits, dimples and ripples on the stamped part.

Whetstone grinding: first clean the surface of the outer cover with a clean gauze, then use a whetstone (20201000mm or larger) to polish, and use a relatively small whetstone (such as a 8100mm semi-circular whetstone) to polish it into a curved shape, which is not easy to touch. The particle size of the oil depends on the surface conditions (such as roughness, electroplating, etc.). Fine-grained petroleum is recommended. The grinding direction of the oil is basically vertical, matching the surface of the stamped part, and more parts can compensate for the lateral grinding.

Metal Stamping Parts

HULK Metal has provided excellent metal stamping services for more than 20 industries such as automobiles, home appliances, machinery, and other manufacturing or construction industries. Our factory strictly implements the ISO9001 quality management system and is equipped with more than 20 stamping machines with different pressures to manufacture metal stamping parts with a thickness of 0.1mm~10mm. Our products can pass CE, GB, and SGS certifications.

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How to deal with common problems in drawing parts processing?

For the above problems, we should reduce the adhesive wear and change the characteristics of the contact pair before reaching it. Let’s analyze it briefly.

1. In terms of raw data of the formed workpiece, the raw data after surface treatment, such as phosphating raw data, spraying or other appearance treatments, form a layer of non-metallic mold on the surface of the forming data. This method is usually costly and requires the addition of additional production equipment and increased production procedures. Although this method sometimes produces some effects, it is rarely used in actual production.

2. Between the metal parts and the mold, adding a layer of PVC film between the mold and the molding data can sometimes solve the problem of workpiece strain. In terms of the organization of the production line, in terms of continuous supply of film, in terms of cyclical production, each time a workpiece is produced, a layer of film needs to be added to affect the production speed. This method is usually expensive and also generates a lot of waste. For the production of small batches of large workpieces, this method of production is desirable. When some forming loads are small, adding lubricating oil or adding EP enhancer lubricant can solve the problem of workpiece strain.

3. Modification of mold convexity, surface treatment of concave mold material or convex and concave mold, or selection of appropriate mold material, so that the stretched material looks like the contact properties of convex and concave molds have changed. From the practical point of view, this is an economical and practical treatment method, which has been widely used. In short, there are many ways to deal with the surface strain of deep-drawn parts and punches and punches and concave dies. The specific method should be based on the size of the workpiece and the load, the type of material to be processed in the production batch, etc.

The shape of the workpiece of the drawing part is complex and diverse, and the dimensional accuracy is required to be high. The processed product is flush with the processed product, and the processed cut surface is very flat and smooth. Compared with other processing techniques, it can process high-precision gear punching parts with very small modulus, and the drawn parts have clear contours and small concave angles.

During processing, drawing parts mainly rely on press pressure to stamp metal or non-metal materials. During the processing of drawn parts, the precision of the workpiece is very high, which can reach the micron level. Compared with other machined parts, this product has obvious advantages: light, thin, well-distributed and pressure-resistant. In the process of processing, mass production can be carried out, the processing time can be shortened, and it can be formed in one place without other processing. This product is mainly used in automobile handbrakes, cars, motorcycles and other products. It is an economical and efficient mechanical and electrical product parts.

Next, we will promote some questions about stretched parts for you so that you can get a clear understanding of them through study. In this way, you can add some expertise to the products on this website.

1. Blanking-drawing, is it suitable for shallow drawing or deep drawing?

Blanking – drawing, suitable for shallow drawing parts, because the steel plate is pressed when blanking, and the steel plate is also pressed when deep drawing. Therefore, on this basis, there will be the above-mentioned corresponding theories. And, there is no doubt about that.

2. How to wire the tie rod?

In this case, in the view of the drawn parts manufacturer without PAX, it cannot use the normal thread rolling method because it is not applicable, but first thread a mandrel on the tie rod, and then perform the thread rolling operation, In this way, the work can be successfully completed.

3. How to prevent the problem of pulling the rod?

In order to prevent hair pulling problems, we can take methods, and perhaps should pay attention to the aspects. There are mainly the following aspects:

First, the appearance of the die used should be smooth, and it should be smooth when stretched;

Second, the hardness of the mold material is too low.

Third, it is necessary to clean the stretched parts. There must be no dust and dirt on it.

The above is the related content of drawing parts processing. For extruded parts, the above problems are related. So based on that, I hope you take it seriously and implement it and know how to respond properly. In this way, even if you encounter it in actual work, you can deal with it calmly, deal with it in time, and then avoid some unnecessary problems or troubles. May the above content be helpful to readers.

How to plan and design the production standard of metal stamping parts?

1. Production planning of metal stamping parts

1. In the production process, a strict inspection system should be established. The first metal stamping part produced in daily production must be fully inspected and can be put into production only after the inspection is passed. At the same time, inspections should be strengthened. If an accident occurs, it should be dealt with in time.

2. During the stamping process, the mold cavity should be kept clean, and the workpieces that should be arranged in the workplace should be placed neatly.

3. Adhere to a civilized production system. For example, the transmission of metal stamping parts and accessories must use appropriate station equipment, otherwise it will affect the surface quality of the workpiece.

2. Metal stamping design standards

1. When designing metal stamping parts, it should be ensured that the dimensional accuracy and surface roughness requirements are as low as possible, which is conducive to the exchange between metal stamping parts, reducing waste, and ensuring the stability of the quality of metal stamping parts.

2. When designing metal stamping parts, the existing equipment, process equipment and process should be used as much as possible to process metal stamping parts to prolong the service life of stamping dies.

3. The designed stamping parts must be conducive to improving the utilization rate of metal materials, reducing the variety and specifications of materials, and reducing the consumption of materials as much as possible; if allowed, use low-cost materials to make the parts as free as possible and reduce scrap Blanking.