How to reduce the possibility of damage to metal stamping parts?

1. How to reduce the damage of metal stamping parts

1. The model, specification and function of hardware accessories should conform to the current national scale and relevant regulations, and match the selection of plastic steel doors and windows.

2. For sliding windows with a width of more than 1 meter or doors and windows with double glazing, double pulleys or moving pulleys should be set.

3. The sliding brace hinge shall not use aluminum alloy material, but stainless steel material.

4. When installing hardware with fastening screws, there must be a metal lining plate inside, and the thickness of the lining plate should be at least twice the pitch of the fasteners. It must not be fastened to plastic profiles and must not be lined with non-metallic materials.

5. The hardware accessories should be finally installed, and the door and window locks, handles, etc. should be assembled after the door and window sashes are in the frame to ensure accurate positions and flexible switches.

6. Pay attention to maintenance after installation of metal stamping parts to prevent rust erosion. In daily use, lightly close and lightly open to prevent hard closing and hard opening, which may cause damage. No noise, now there are nylon wheels, which are not only noiseless, but also smoother, lighter, and have no shorter lifespan than the aforementioned pulleys. To make the doors and windows operate normally and smoothly, it is necessary to choose high-quality pulleys for the doors and windows. On the surface, the inferior pulleys have rough workmanship, no smoothness, and inflexible sliding.

How to effectively prevent punching noise

1. How to prevent stamping noise

1. Pay attention to the maintenance and cleaning of the mold, and keep the cutting edge sharp.

2. The shape, quantity, material and punching line of the die blade are longer. The contact surface between the die edge and the part should not be too large. The punch adopts inclined edge step punching, so that the cutting depth of the die at different positions is different, and the real cutting of the whole process is realized, rather than simultaneous extrusion.

3. The die edge must be perpendicular to the installation surface, and the matching clearance of the convex and concave die edges should be reasonable. When unloading is difficult, the lower die gap can be increased, the unloading force can be increased, and methods such as soft-surface unloading plates can be used.

4. The matching accuracy between the working templates and some exhaust grooves are processed.

5. The baffle is changed to small pieces, and the stripper and lower formwork are changed to inserts to reduce the attack area.

6. The source of the ejection top of the stripper plate is changed to a T-shaped ejector rod, the spring is installed on the upper die seat, and the equal-height sleeve is matched with the ejector rod to ensure that the stripper plate still has a certain degree of free movement when the mold is opened.

7. Maintain good lubrication, the mold is smooth, and there is no interference.

8. The aluminum plates on the surface of the upper and lower die bases are used for punching buffers.

9. After the mold is debugged, install a sound insulation cover or a sponge board on the punch for sound insulation.

10. Improve the precision of the punch press and reduce the structure noise. The buffering vibration damping and noise reduction oil cylinder is installed on the worktable, the helical teeth are lubricated, and the gear cover is installed in the pneumatic system.

How much do you know about the principle of stamping parts processing?

1. The principle of stamping processing

Stamping parts are actually the use of punches and dies to apply external forces to sheets, strips, pipes, and profiles to cause plastic deformation or separation, so as to obtain the required shape and size of the workpiece. The processing method, the obtained workpiece It’s stamping parts.

1. Stamping parts are made by stamping under the premise of low material consumption and small consumption. Its parts are lightweight and rigid. After the plastic deformation of the plate, the internal structure of the metal is improved, and the strength of the stamping part is improved.

2. The dimensional accuracy of the stamping parts is high, and the size of the stamping parts is uniform and the same as that of the die, and the interchangeability is good. The general assembly and use requirements are well met without further machining.

3. The surface quality of stamping parts is good, the appearance is smooth and beautiful, which provides convenient conditions for surface coating, electroplating, phosphating and other surface treatments.

What stamping oil is used for precision stamping parts?

Processing machinery parts, such as various stamping parts, sheet metal parts, welding parts, electronic devices, connectors, etc., with the development of social hardware products, so in the process of metal stamping processing, what is the selection principle of stamping oil products?

1. Silicon steel plate is a material that is easy to punch. Generally, to clean the workpiece, a low viscosity punching oil will be used to prevent punching burrs.

2. When selecting stamping oil for carbon steel plate, the best viscosity should be determined according to the difficulty of the process, the method of feeding the drawing oil and the degreasing.

3. Galvanized steel sheets will react chemically with chlorine-based additives, so when selecting stamping oil for galvanized steel sheets, attention should be paid to the possibility of white rust in chlorine-type stamping oil, and the use of Yida Borun sulfur-type stamping oil can avoid the occurrence of white rust. Rust problem, but should be degreased as soon as possible after stamping.

4. Stainless steel plate is a material that is prone to hardening, and requires the use of high oil film strength and anti-sintering tensile oil. Generally, stamping oil containing sulfur-chlorine compound additives is used to ensure extreme pressure performance while avoiding problems such as burrs and cracks in the workpiece.

5. Aluminum and aluminum alloy plates cannot use stamping oil containing chlorine and sulfur additives, preferably stamping oil with a neutral pH value.

The stamping oil suitable for the forming of thin plate parts of automobiles and motorcycles is a platen forming oil. It can also be used for the stretching and calendering of stainless steel parts. With the characteristics of high strength and high adhesion, single-type stamping and forming operations can be more effective. The surface finish and stretching effect of the workpiece are desirable and necessary oil for difficult mechanical stamping processing.

The stamping oil used in precision stamping parts plays a key role in the stamping process. Good cooling performance and extreme pressure and anti-wear performance have made a qualitative leap in the service life of the mold and the improvement of the accuracy of the workpiece. Depending on the material of the workpiece, the emphasis on the performance of stamping oil is also different.

What are the external surface defects of electronic stamping parts

First, the advantages of electronic stamping parts processing

1. The electronic stamping processing of precision stamping parts has high production efficiency, convenient operation, and is easy to realize mechanization and automation. This is because stamping is based on stamping dies and stamping equipment to complete the processing. The ordinary press is dozens of times per minute, and the high-speed pressure is hundreds or even hundreds of times per minute.

2. In the case of electronic stamping parts for precision stamping parts, because the die ensures the size and shape accuracy of the stamping parts, the appearance quality of the stamping parts is generally not damaged, the service life of the die is generally long, the stamping quality is stable, the interchangeability is good, and the consistency specialty.

3. Precision stamping parts can process parts with large sizes and complex shapes, such as stopwatches as small as clocks, car longitudinal beams, cover parts, etc. Coupled with the cold deformation hardening effect of the data during the stamping process, the stamping strength and stiffness are high.

4. The stamping of precision stamping parts generally does not generate chips and debris, the material cost is low, and other heating equipment is not required. It is a processing method that saves materials and energy. The cost is relatively low.

With the development of society, stamping products have been popularized in all walks of life, and it is very important to process high-quality stamping parts. In the stamping process, there will be many shortcomings in the appearance of its products. What’s the matter?

When processing stamping parts, there are sometimes problems such as impact lines, slip lines, sinking, dark pits, and distorted appearance. For stamped sheet parts, cosmetic defects are not allowed. How did it form?

(1) The impact line and the slip line are mainly due to the appearance scratches, sags and dark pits formed by the conflict between the sheet and the mold after the contact of the stress accumulation during the stamping process.

(2) The appearance distortion is mainly due to the insufficient deformation of the parts, the small strain of some materials, and the shortcomings after the external force is released. So how to eliminate these shortcomings?

By changing the punch fillet and die fillet, the drawing depth is increased, the pressing material surface is changed, and the impact line is eliminated.  

Slip lines can be eliminated by changing the product shape (left-right symmetry), increasing resistance, etc.

Eliminate subsidence and appearance distortion, understand the grade of stress gradient of parts in the deformation area, and try to ensure the uniformity of plastic deformation of products. At the same time, by increasing the resistance, part of the shape strain is improved.  

More and more shortcomings can be identified in CAE simulation and use as technology evolves. For example, through the tangent displacement field of the molding, it is possible to understand the activity of the data and help to better solve the shortcomings in the molding of the part.

The processing of electronic stamping parts is mainly to make metal or non-metallic sheets

The accuracy and surface state of hot stamping parts are lower than those of cold stamping parts, but they are still better than castings and forgings, and the amount of cutting is less. Stamping is a production method that uses composite molds, especially multi-station-level molds, which can complete multiple stamping processes on a press to achieve automatic production from material uncoiling, leveling, cutting to forming, and finesse. The production efficiency is high, the labor conditions are good, and the production cost is low. Generally, hundreds of pieces can be produced per minute. Stamping is mainly classified according to the process, which can be divided into two categories: separation process and forming process. The separation process is also known as cutting, and its purpose is to separate the stamped parts from the sheet along the contour line to ensure the quality requirements of the separated section. The surface and internal properties of the stamping plate have a great influence on the quality of the stamped product, and the thickness of the precision stamping material is required to be accurate and uniform; the surface is smooth, no spots, no scars, no scratches, no surface cracks, etc. Uniform yield strength, no obvious direction; high uniform elongation; low yield ratio; low work hardening rate. According to the shape, precision and production volume of the part, the material is then cut in punching and budding, and the blank is placed on the scrap die.

The processing of precision stamping parts mainly uses metal or non-metallic plates through the pressure of the press to help the stamping die stamping and forming. What are its main characteristics? Let’s look further down.

1. Main features of precision stamping die processing

1. Precision stamping parts are made by stamping under the premise of low material consumption. Its parts are lightweight and rigid. After the plastic deformation of the plate, the internal structure of the metal is improved, and the strength of the stamping part is improved.

2. Precision stamping parts have high dimensional accuracy, the same mold parts have the same size, and have good interchangeability. No further machining is required to meet general assembly and use requirements. It should be facilitated to use existing equipment, process equipment and process flow as far as possible to process it.

3. In the process of stamping production, because the surface of the material is not damaged, it has a good surface quality, and the appearance of the parts is smooth and beautiful, which provides convenient conditions for surface painting, electroplating, phosphating and other surface treatments.

2. Design principles of precision stamping parts

1. The design of stamping parts conforms to the use and technical performance of the product, and is easy to assemble and repair.

2. The design of stamping parts is 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 possible, use low-cost materials and make parts as scrap-free as possible to reduce scrap.

3. The design of stamping parts is simple in shape and reasonable in structure, which is conducive to simplifying the mold structure and simplifying the number of processes, that is, to complete the processing of the entire part and reduce other methods, which is conducive to stamping operations, facilitates the organization of mechanized and automated production, and improves labor productivity.

4. Under the condition of ensuring normal use, the designed stamping parts and precision stamping parts should reduce the dimensional accuracy level and surface roughness level as much as possible, which is conducive to product exchange, reducing waste and ensuring product quality stability.

5. The designed stamping parts should be as beneficial as possible to the processing of existing equipment, process equipment and technological processes, and to prolong the service life of the stamping die. From car stringers, covers, etc.

What are the precautions in the processing of metal stamping parts?

1. Attention should be paid to processing metal stamping parts

1. Cracking at the bottom of the part: The main reason for the cracking at the bottom of the part is that the plasticity of the material is poor or the blank holder of the mold is pressed too tightly. The preventive measure is to replace the material with better shaping or loosen the blank holder.

2. Wrinkles on the side walls of the parts: The main reasons for the wrinkles on the side walls of the parts are the insufficient thickness of the material (thinner than the small allowable thickness) or the eccentricity when the upper and lower molds are installed, resulting in a gap on one side If it is too large, the gap on the other side is too small. The preventive measure is to replace the material in time and readjust the mold.

3. Scratches on stamping parts: The main reason for scratches on parts is that there are sharp scars on the mold or metal dust falls into the mold. The preventive measures are to grind the scars on the mold and clean the metal dust.

2. Employees should pay attention to their own operating procedures in the process of stamping parts processing

1. It is strictly forbidden to wear slippers when going to work, so as not to hit the feet with molds and iron blocks in the workshop. Squad leaders, fitters and mold repairers must wear safety shoes when going to work.

2. At work, first check whether the equipment is running abnormally, such as single, unclear continuous flushing, poor operation or electrical failure, immediately stop the machine, and promptly find a technician on duty to deal with it.

3. Check the equipment according to the inspection content on the equipment inspection card, pay special attention to whether the guide and braking device of the punch press are in normal operation, and the functions of single punch and continuous punch are clear.

4. It is strictly forbidden for operators and mold maintenance personnel to put their hands into the mold for operation.

5. Any flammable and explosive items cannot be stored under the switch.

6. When installing the suction fan, the operator is strictly forbidden to put his hand on the motor to clean up the waste.

7. Cut off the power supply, clean and scrub the work surface, remove the mold for maintenance and storage, and check the oil in the lubrication system at certain times every week.

8. Male operators are strictly prohibited from having long hair, and female operators should roll up their long hair to prevent the hair from getting caught in the flywheel.

9. It is strictly forbidden to wear gloves when drilling and milling machines; when using the grinding machine, wear masks and goggles to protect yourself.

10. Pay attention to fire prevention of other oils such as white oil, alcohol, cleaning agent, etc.

11. When there is oil, clean it up in time to avoid slipping.

12. Special tools (pliers, hooks) must be used when laying out or manually feeding and taking out blanks individually. It is strictly forbidden to feed and take blanks by hand. One switch will hurt your hand, you need a double switch. The machine must not leak oil, otherwise it will fall off. Do not expose the power supply, it is dangerous.

13. Gloves should be worn when packing materials, leftovers and molds to avoid scratching hands.

14. Pay attention to dragging the mold to prevent it from falling on the ground (the flatbed truck must be lowered to pull the mold).

15. The operator needs to wear earplugs.

16. When a new employee goes to work on the first day, the team leader must explain the safety operation rules to him, and learn the safety operation rules once a week.

17. It is strictly forbidden to blow the air gun at people, it is easy to hurt the eyes.

18. When adjusting the machine, the machine must be adjusted to single action, and it is strictly forbidden to move the discharge belt.

19. Operators are strictly prohibited from chasing and beating in the workshop, so as to avoid falling, knocking over the product or hurting themselves.

20. When installing the mold on the small punch, first loosen the locking device of the guide rail, install the upper and lower molds, and then adjust the stroke of the guide rail until the requirements are met and the fastening device is locked. In addition, a single stroke must be performed when the high punch is set up in the mold. After locking the upper mold, the oil pressure locks the mold and then locks the lower mold, and check again before production.

21. It is strictly forbidden for non-electricians to connect and repair the machine.

22. Wear gloves and pay attention when stamping iron sheets, otherwise it will hurt your hands.

23. It is strictly forbidden to use the foot switch on the punch, and all the original equipment of the machine are removed.

24. When the machine is found to be abnormal, turn off the power first, and then find the technician on duty to deal with it in time.

25. When cleaning and checking the equipment, the power must be cut off before operation.

26. Check whether various equipment and materials are ready.

What are the reasons for the failure of bending sheet metal processing?

In production, there will be many defective products in product processing. These bad contents include improper angles, different heights of folded edges, two bending dies with tools, scratches and folded edges leading to hole dislocation, etc. These are all caused by human factors.

If the angle is not in place, the production pressure is not suitable (either too large or too small). Technicians need to carefully adjust the appropriate pressure to ensure the accuracy of the product’s bending angle.

The height of the folded edge is not the same, that is, the positioning of the two sides is not on the same line, and the size of the processed product is naturally different. In order to solve this problem, the operating technician needs to correct the rear positioning when processing any product.

There are obvious scratch marks on both sides of the folded edges. This phenomenon is actually because the lower mold is not clean, and iron filings fall into the grooves under the mold. To avoid the current practice, when processing products, bend them regularly. Lower tank for cleaning.

The reverse side is also a bad factor caused by human beings. It is a no-no for operators not to look at sheet metal drawings. To solve this problem, there can only be a dead way. Ask the quality personnel to confirm the quality of the processing.

In short, the above four points are the problem points that Xiaobian often sees at the scene of sheet metal processing. I will share with you here, and I hope to make similar mistakes as little as possible. It also helps readers.

Six tips for improving sheet metal fabrication design

2. Inner radius

As the bend radius decreases, the strain inside the part increases. If the material fatigue point is exceeded, cracks will begin to form. When dealing with thin sheet metal, use the 1x thickness = inner radius rule.

3. Simplify the crease

If you can simplify the design, it will cost less to produce in the long run. Simple curved corners can help you achieve this. These bend radii are equal to or greater than the thickness of the sheet. Keep in mind that designing small elbows for large, thick parts can be inaccurate and expensive. Consider how it is simpler to create a part design that will also be cost-effective and easy to produce.

4. Tooling

The tools you use also limit the shape of the part. Conventional brake tools can bend straight to any length machined from sheet metal. Machining and precision sheet metal parts have very different terms in how they are manufactured and tolerances are allowed.

5. Limit tight tolerance

Excessive tolerances on parts can be unnecessary and expensive. Only a few surfaces are important to its function. These include distance, radius and aperture. Tight tolerance limits will help you create more budget friendly designs.

6. Uniform bending maintenance

Maintaining a properly even bend can increase the load-carrying capacity of the part. Bends at the same location on the part should be designed in the same direction to avoid part reorientation. This helps make parts more cost-effective and easier to produce

By following these tips, fabrication designers can ensure accurate formation and production of thin steel sheets. This helps reduce project costs, shorten lead times and provide customers with better quality. Producing high-quality parts requires careful consideration at every step if you want to be successful.

What are the reasons for poor sheet metal processing?

In the actual production, the requirements for product quality are still rising, and the program matching the product is also improving. In the past, there were limited automatic expansion procedures. Only a few models can be expanded. Now basically all 3D The software can do the expansion effect. Why are there still defective products in such a situation? Let’s analyze the reasons for the defective products, taking the CNC punching machine as an example.

CNC punching machine sounds like a device for making precision parts. In fact, some of the samples made by CNC are defective. Most of the bad reasons are due to artificial blindness. Such as engineers, operating technicians operating NCT, and raw materials used.

The engineer’s fault is often caused by the habitual input of the thickness of a certain material, and the bending coefficient is related to the thickness of the plate; the operator’s error is also manifested in carelessness. After importing the product arranging table, it is necessary to adjust the coordinates of the parts. , the usual cause of failure is that incorrect coordinates are entered; and a material cannot be produced according to the actual thickness. It is also possible that materials are not used in accordance with the requirements of the drawings, such as smooth stainless steel, single-sand-surface stainless steel, double-sand-surface stainless steel, etc., one material is required, and other replacements are bad. It is not easy to make mistakes in the digital punching of sheet metal parts, and there are so many bad reasons. Most processes rely on precision equipment processing, and labor is only auxiliary work. This problem is a practical problem encountered by the editor in the realization of the NCT workshop, and I hope it can help readers.

What are the bad reasons for welding sheet metal processing?

2. How does undercutting produce adverse phenomena?

There are two main reasons:

1. The welding control of Welding Brothers is not very good. The molten iron is blown away from the arc blowing force to form a pit.

2. If the current is too large, the front of the product will not fall off under no pressure.

3. How does the welding penetration cause the bad phenomenon?

1. The welding current is too large. Reduce the welding current.

2. The root gap is too large, and the cutting is not accurate. This can only be improved by the skill of the cutting master.

3. The welding speed is too slow, just speed up the welding speed.

4. The blunt edge is too small to reduce the root gap. According to the thickness of the workpiece, select the appropriate groove.

5. The welding arc stays for too long in a certain period, try to avoid the arc staying in a certain period for a long time.  

Well, the above is the relevant content about the reasons for poor welding sheet metal processing, I hope the above content will 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.

What problems should be paid attention to in the production process of metal stamping parts?

1. Precautions for the figure of metal stamping parts

1. Wrinkles on the side walls of the parts: The main reasons for the wrinkles on the side walls of the parts are insufficient material thickness (thinner than the minimum allowable thickness) or eccentricity when installing the upper and lower molds, resulting in a large gap on one side and a small gap on the other side. Precautions are to replace the material immediately and readjust the mold.

2. Scratches on stamping parts: The main reason for scratches on parts is that there are sharp scars on the mold or metal dust falls into the mold. The preventive measures are to grind the scars on the mold and clean the metal dust.

What types of precision stamping parts are there?

1. Types of precision metal stamping parts

1. Electrical iron cores: mainly include E-shaped transformer cores, EI-shaped transformer cores, I-shaped transformer cores, and other transformer cores.

2. Auto parts: mainly include automotive structural parts, automotive functional parts, automotive lathe parts, automotive relays, etc.

3. Heat exchanger fins: mainly include industrial heat exchanger fins, household heat exchanger fins, automotive heat exchanger fins, etc.

4. Appliance parts: mainly include large appliance parts, such as color tube electron gun parts, small appliance parts, various structural parts and functional parts, etc.

5. Motor core: mainly includes single-phase series motor core, single-phase household motor core, single-phase shaded-pole motor core, permanent magnet DC motor core, industrial motor core, plastic sealed stator core, etc.

6. IC integrated circuit lead structure: It mainly includes discrete device lead structure and integrated circuit lead structure.

7. Electronic parts: mainly including connecting devices, connectors, brush parts, electrical terminals, elastic parts, etc.

8. Other types of parts: mainly include instrumentation parts, IT parts, acoustic and camera parts, modern office parts, daily hardware parts, etc.

Well, the above is the relevant content about the types of precision stamping parts, I hope to help readers. Zhejiang Baifudu Electromechanical mainly provides precision metal stamping parts, metal stamping shrapnel, stainless steel stamping parts processing, metal stamping and bending processing, metal bending processing, metal stamping die processing, etc. Friends in need can come to consult.

How to deal with mold deformation?

First, the treatment method of mold deformation

1. Reasonable selection of materials. For sophisticated and complex molds, micro-deformation mold steel with good material (such as air-quenched steel) should be selected. For die steel with serious carbide segregation, reasonable forging and quenching and tempering heat treatment should be carried out. For larger and unforgeable die steels, a solution double refinement heat treatment is performed.

2. The mold structure design should be reasonable, the thickness should not be too great, and the shape should be symmetrical. For large deformation molds, the deformation law should be mastered, and machining allowance should be reserved. For large, sophisticated and complex molds, a combined structure can be used.

3. Precise and complex molds should be pre-heated to eliminate residual stress during processing.

4. Reasonable selection of heating temperature and control of heating speed. For sophisticated and complex molds, balanced heating methods such as slow heating and preheating can be used to reduce heat treatment deformation of the mold.

5. On the premise of ensuring the hardness of the mold, try to use pre-cooling, graded cooling quenching or warm quenching process.

6. For sophisticated and complex molds, vacuum heating and quenching and cryogenic treatment after quenching should be used as much as possible.

7. For some sophisticated and complex molds, pre-heat treatment, aging heat treatment, and quenching and tempering nitriding heat treatment can be used to control the accuracy of the mold.

8. When repairing defects such as mold blisters, pores, and wear, use repair equipment with small thermal shocks such as cold welding machines to avoid deformation during the repair process.

In addition, correct heat treatment process operations (such as hole plugging, tying holes, mechanical fixing, appropriate heating methods, correct selection of the cooling direction of the mold and the direction of movement in the cooling medium, etc.) and reasonable tempering heat treatment process also reduce accuracy and Effective measures for complex mold deformation.