Why do precision metal molds have substandard products?

1. Reasons for unqualified products of metal stamping parts

1. The product is unqualified due to the springback of the material. At this time, we can reduce the springback of the stamping parts through the following methods, use the stamping material with stable mechanical properties, increase the annealing process, and use the correction bending. The material should be de-fired before bending, and the cooled material should be softened before bending; if it is difficult to eliminate the deformation during the stamping process, the slope of the model should be adjusted at this time.

2. If there is a problem with the positioning of the strip due to the deformation and wear of the positioner, a new positioner must be replaced.

3. When adjusting the press, if the low position of the slider is not adjusted well, the bending parts are not qualified.

4. The pressing equipment of the mold does not have the function of pressing the material. It must be repaired or replaced with a new pressing spring or the pressing force must be adjusted.

5. After a long time of use, some parts of the mold are loose, which causes the position of the abrasive tool to change.

6. It may also be caused by the operator not using the mold as required.

The above is why there are unqualified metal stamping parts. I hope the above content can help readers.

What are the layout methods of precision stamping parts?

1. Sampling of waste

Refers to other plates other than workpieces during the blanking process of precision stamping parts, including process waste and structural waste. All material contour lines are blanked, and there are process residuals between workpieces and workpieces and between workpieces and strips. Due to the blanking along the closed contour of the blanked part, the quality and die life of the blanked part will be relatively high.

2. Sampling with less waste

Precision stampings are cut or stamped along the contours of parts of the workpiece and have laps between the workpiece and the workpiece, and between the workpiece and the sides of the strip. The blanking of this method is only a part of the contour of the workpiece, which is affected by the quality of the cut strip, the positioning accuracy and the error. The quality of the blanking parts is slightly poor, but the material utilization rate can reach 70%~90%.

3. No waste layout

Precision stamping parts have no overlap between the blanking parts and the blanking parts, and between the blanking parts and the sides of the strip. In fact, the blanking parts are obtained by cutting the strip, and the material utilization rate can reach 85%-90%. However, this layout method will make the quality of the blanking parts slightly worse.

What are the processes required for the deformation of stainless steel tensile parts?

1. Optimize the flange diameter, reduce the maximum tensile stress and reduce the deformation resistance. The lateral dimension of the die for the first deep drawing is increased, and the fillet of the die for the first deep drawing is enlarged. After the pre-drawing process is completed, the trimming process is added to remove excess material as much as possible, reduce the forming resistance of the stainless steel drawing material, and effectively prevent the material from cracking when it is further deformed.

2. Coat the surface of the mold with dry film lubricant (the main components are: nitrocellulose, oily alkyd resin, plasticizer, extreme pressure agent and other additives) to reduce the frictional resistance between the material and the mold surface during deformation. It makes it easier for the material to move from the deformation zone to the force transfer zone.

3. Combine the last two processes in the original process (i.e. forming, deep drawing, and flanging) into one (forming and flanging), so as not to increase the processing steps of the parts, so it can effectively control the processing cost. Reasonable preventive measures such as reasonable convex and concave die fillets, adding appropriate heat treatment procedures, and applying lubricant on the surface of the concave die can improve the success rate of stainless steel drawing parts.

How to improve the processing deformation of hardware accessories?

1. What are the main points of hardware accessories processing?

1. The machining accuracy of the parts changes due to internal force. Skilled workers know that during machining, the part is clamped by the three jaws of the lathe to ensure that the forces the part is subjected to during machining are stable over time. It will loosen the lathe chuck, reduce the force on the part and cause deformation.

2. Deformation easily occurs during heat treatment. When machining some thin and small parts, it is usually necessary to heat treat them first. At this time, if the professional knowledge of the technicians is not solid and the structural performance of these parts is not well understood, it is easy to cause the parts to bend.

3. The parts are elastically deformed under the action of external force. When machining parts, lathes and fixtures are often used. When the two are not uniform, the uneven force on the fixed parts will occur, and the deformation will occur when the force is small.

Second, the improvement measures of hardware accessories processing

1. After the parts are heat treated and deformed naturally, they are trimmed with professional cutting tools to ensure the perfection of the parts.

2. Carry out technical transformation to improve the rigidity of components.

Technicians need to improve the process, increase innovation, select the appropriate heat treatment method, change the stiffness of the parts, so that the parts are not easily deformed.

Comparison of traditional punching method processing and laser cutting of hardware

Whether it is from the quality, packaging and supply of stainless steel hardware products, or the research and development and extension of stainless steel hardware tool products, it is unanimously praised and praised. The development advantages of domestic stainless steel hardware tools, the production centers of multinational stainless steel hardware companies have been transferred to China, allowing domestic stainless steel hardware tools to provide a basis for the market.

It is often used in modern hardware processing and manufacturing. In the traditional processing industry in the past, the processing method of die punch was mainly used to process the hardware. According to the shape required by the customer, the mold is opened, all the molds are evenly installed on the punching machine, and the workpiece is formed at one time by the large punching force. This method is suitable for large-scale hardware production, and the speed is very fast, and it only needs to be stamped once to form. However, this method of processing also has disadvantages. For example, there are a lot of burrs in the stamped workpiece. For example, mold making and mold maintenance cost a certain amount of cost and development cycle.

With the continuous development of current laser technology, hardware has gradually begun to be widely used in laser cutting for processing. The use of laser cutting machine to process hardware avoids the cost of molds and effectively improves the quality of cutting. The shape and size of the workpiece to be cut can be drawn with CAD drawings, and then written into the equipment program, and the shape required by the workpiece can be quickly cut.

Compared with laser cutting, stamping also has advantages and disadvantages. The advantage is that the punch is not limited by the mold, one punch can be equipped with multiple sets of molds, and the speed of one punch is also very fast. The disadvantage is that the punch is very limited by shape, format, material and thickness. Therefore, the use of punching machines to process workpieces and sheet metal with simple shapes has great advantages.

Because the laser cutting machine has fast cutting speed, large production volume, short production cycle, good cutting quality, no deformation during processing, no mold opening, no wear, labor cost saving, no shape restriction, high degree of automation, suitable for all metal materials The laser cutting method is called a technological revolution in sheet metal processing in the industry, and it is also widely recognized by the sheet metal processing industry. At present, the metal sheet is as thin as 1mm and as thick as more than 50mm, and the metal laser cutting method is widely used. At the same time, metal laser cutting machines are also developing in the direction of high power, which means that the future metal laser cutting field will be more suitable for thick metal processing and higher-speed metal laser processing.

In the context of Made in China 2025, the sheet metal processing industry is also transforming and developing in the direction of high efficiency and high quality. Metal laser cutting technology is in line with this characteristic, so its wide application in the sheet metal processing industry has promoted the rapid development in the past five years. High-precision, high-speed, laser cutting technology makes sheet metal processing products higher in quality and efficiency!

How to ensure the dimensional accuracy of medical device stamping parts?

1. How to ensure the dimensional accuracy of stamping parts of medical devices

1. Regularly check the stamping and tightening of the workbench, whether the electrical facilities are running and whether the operator refuels regularly to ensure the normal operation of the equipment.

2. The way the technicians install and debug the molds is reasonable. Before mass production, 5 pieces of inspections are carried out to fully ensure the normal use of the molds.

3. During the production process of stamping parts, the quality inspection staff will conduct regular process inspections for each process, and register the size data in time to prevent deformities in large-scale production.

4. After the mass production is completed, after packaging, the quality inspection staff will conduct a mass production sampling inspection on the finished product and record the size data.

Another point is that some companies usually do not pay attention to these key points about quality, but PAXD will regularly conduct quality training for operators to enhance their professional knowledge and enhance their awareness of literacy! Choose Zhejiang Baifudu Electromechanical Co., Ltd., worthy of your trust!

The Importance of Stamping Parts for Automotive Pipe Supports

There are many kinds of automobile pipeline stamping parts, which are generally used in the transmission system and steering system of automobiles. Its advantages lie in the specification of materials, high precision and relatively low cost.

The cold stamping process technology is widely used in the production of stamping parts for automobile pipeline brackets, which is suitable for many types of stamping parts in the automobile industry and requires large-scale production. In medium and heavy-duty vehicles, most of the supporting parts, such as the frame and carriage of large vehicles, are automotive stamping parts.

The steel mainly used for cold stamping is steel plate and steel strip, which accounts for 80% of the steel consumption of the whole vehicle. The production of cold stamping materials and automobile stamping parts is very close.

Usually a relatively high-strength steel plate is selected. The quality of the selected material not only determines the performance of a good product, but also directly affects the process design of our later automotive stamping process, the service cycle of the mold and the impact of the production process. To the quality, cost, service life and production organization of the product, it is an important and complicated task to reasonably select materials that are conducive to product performance. This material is usually also designed and evaluated in the initial design, taking into account the performance and required characteristics of different types of automotive products to ensure vehicle quality and performance.

How to solve the problem of unqualified stamping size of electric vehicle stamping parts

1. In the production process of electric vehicle stamping parts, due to the burrs of the stamping parts during blanking, it is necessary to study the cutting edge, and it is also necessary to pay attention to whether the blanking gap is reasonable. During bending, the instability of stamping parts is caused, mainly for U-shaped and V-shaped bending, for the guide position before bending, the guide position during the bending process, and the pressure during the bending process. Holding the material to prevent the stamping from slipping during bending is the key to solving the problem.

2. During production, the stress on the material increases, and the stamping parts tend to turn over and twist. When the material is turned over, the size of the punching hole will become smaller, and the strong pressure on the material will cause plastic deformation of the material, so the size of the punching hole will be larger. Thereby reducing the strong pressure, the punching size will be smaller.

3. In the production process of electric vehicle stamping parts, if the end is repaired with a slope or arc, due to the relief of the punching force, the stamping parts are easy to turn over and slander, so the stamping size will be larger. The convex end is flat, and the size of the punching hole is relatively small.  

五金冲压件加工对弯曲件的要求有哪些?

1. The processing of metal stamping parts is a requirement for bending parts

1. The shape of the bending part should be as symmetrical as possible, and the bending radius should not be less than the minimum bending radius allowed by the material.

2. The curved side is too short and not easy to form, so the straight part of the curved side should be the curved side H>2δ. If H is required to be very short, you need to leave an appropriate margin to increase H, and after bending, cut off the added metal.3. When bending with holes, avoid hole deformation.

2. Requirements for deep drawing parts

1. The shape of metal stamping parts should be simple and symmetrical, and the depth should not be too large. In order to reduce the number of deep drawing, it is easy to form.  

2. The fillet radius of metal stamping parts does not increase the process. Otherwise, the number of deep drawing and shaping will be increased, the number of molds will be increased, waste will be easily generated, and the cost will be increased.

Whether the die used for metal stamping parts is an elastic pressure discharge plate or a fixed discharge plate depends on the size of the discharge force, and the material thickness is the main consideration. The discharge force of the elastic pressure discharge plate is greatly enhanced. Metal stamping parts are formed by applying external force to plates, strips, pipes and profiles by means of presses and dies to cause plastic deformation or separation to obtain workpieces (stamping parts) of the required shape and size.

How to choose a metal stamping press?

1. Whether the type and working form of stamping equipment are suitable for the process to be completed, and whether it meets the requirements of safe production and environmental protection. For the blanking process, open crank presses are often used for medium and small blanking parts; closed crank presses are generally used for large, medium and precision blanking parts; special dynamic presses or hydraulic presses are used for fine blanking. Formwork press. The hydraulic press is generally not used in the blanking process due to its slow speed, low efficiency, and sudden unloading at the end of blanking will produce shock vibration;

2. Whether the pressure and power of the stamping equipment meet the requirements of the completed process.

3. Whether the die installation height, table size, stroke, etc. of the stamping equipment are suitable for the die used to complete the process.

4. Whether the number of strokes of the stamping equipment meets the requirements of production efficiency.

1. How to choose a stamping part processing press

1. Small and medium-sized blanking parts, bending parts, drawing parts, forming parts and other stamping parts that do not require high precision generally use “open single-column presses”.

2. “Double-action presses” are generally used for medium-sized tensile parts.

3. For large and medium-sized stamping parts with high precision requirements, “closed presses” or “multi-point presses” are mostly used.

4. For the production of large batches of stamping parts, “high-speed presses” or “multi-station presses” are generally used.

5. The extrusion process should use a special “cold extrusion machine”.

6. The precision stamping process should use a special “precision stamping press”.

7. Stamping processes such as leveling, correction, and bending should choose a “double-column or four-column press”, a spiral friction press or a hydraulic press with good rigidity.

8. For the processing of porous stamping parts, CNC punching die rotary head press is used.

9. For the die that requires the punch to be unable to leave the spring-pressed discharge plate during the stamping process, a press with an adjustable stroke should be used.

Silicone mold production process and common problems

First, the choice of mold

The selection of the mold opening form and the selection of the mold line are very important. First, it is convenient to take the mold. Second, the mold line does not affect the overall effect of the product. Third, it does not affect the product quality. If there are too many materials, product cracking is prone to occur; the fourth is to reduce the process operation process, such as opening half of the mold.

Second, the mold processing

1. In order to prevent the silicone from flowing around, fix the mold with a wooden square or a wooden board within the specified range. When opening the mold, use a wooden board and sludge to separate the first part. It is required that there is no gap between the sludge and the mold, and the surface of the sludge is smooth and flat. .

2. Apply petroleum jelly or spray release agent on the plaster mold or mold. Smooth products need to apply Vaseline evenly with a clean cotton cloth, keep it for 30 minutes, so that the mold can fully absorb the Vaseline, and then wipe the surface of the mold with a clean cotton cloth, the surface is required to be bright; for textured products, just apply Vaseline evenly. , the silicone is adjusted according to the formula.

3. The silica gel should be stirred in an irregular direction, so that the curing agent and the silica gel are fully mixed, and the air mixed into the glue should be minimized.

3. Matters needing attention

After the mold is made, it is necessary to make a plaster or glass fiber reinforced plastic jacket to support the silicone soft mold. Note:

1. Mold line selection: choose the position that does not affect the appearance of the product; the position that is easy to process after grouting; the position that the mold itself is easy to disassemble; the position that the product is not easily deformed.

2. Do not blindly increase the amount of hardener to catch up with the production schedule, otherwise the service life of the silicone mold will be greatly reduced.  

What is the cause of the tensile die strain and what is the solution?

The cause of the injury

1. Between the workpiece and the mold

Adding a film such as PVC between the mold and the molding material can sometimes solve the problem of workpiece strain. For the production line, the film can be continuously provided by the mechanism. For the stamping equipment of periodic production, each workpiece needs to add a layer of film, which affects the production efficiency. This method is generally expensive and also produces a large amount of waste. For small batches of large workpieces Production is desirable.

2. Raw materials for forming workpieces

By surface treatment of the raw material, such as phosphating, spraying or other surface treatment, a non-metallic mold layer is formed on the surface of the material to be formed, which can greatly reduce or eliminate the strain of the workpiece. This method is often more expensive. high, and requires the addition of additional production equipment and increased production processes.

3. Mould

By changing the convex and concave ink materials of the mold or surface treatment of the convex and concave molds, the secondary properties of the contact between the finished material and the convex and concave molds are changed.

Second, the solution

1. There are many ways to solve the problem of surface strain of workpiece and mold convex and concave mold. For different situations, the application method needs to be selected according to the size of the workpiece and the load, the production batch, the type of processing material, etc.

2. Using cemented carbide as the mold material, the chemical vapor phase of the convex and concave surface of the mold is deposited. TD is usually a cladding treatment. TD coating treatment is cost-effective.

Well, the above is what is the solution to the cause of the stretching die strain? I hope the above content can help readers.

What is the reason for the die processing of the drawing die?

During the processing of the drawing die, if the die clamping is not flexible enough, or there is a stuck situation, then the production should be stopped immediately, and the main reason for the stuck die should be found out and troubleshoot. Otherwise, it may expand the failure, resulting in mold damage.

First, the main reasons for the card mold are:

The mold is poorly guided and tilted. And there are foreign objects in the template, so that the template cannot be flatly attached; there is a problem with the strength design of the mold or uneven force. It will lead to the deformation of the mold, such as the hardness and thickness of the mold base and the template are too small, and it is very easy to be deformed by external force; the mold position is not installed correctly, and the positioning error of the upper and lower molds is too poor. Or the precision of the press is too low, causing the mold to interfere; the strength of the punch is low, and the position of the large and small punches is too close, which makes the lateral force of the mold unbalanced. At this time, the strength of the punch should be increased, and the guidance and protection of the stripper plate should be strengthened.

The above has explained the reasons for the occurrence of card molds in the processing of drawing molds, and different reasons will have different solutions, so we need to solve the problems in a targeted manner.

What are the maintenance methods of hardware drawing molds?

1. Maintenance method of metal drawing die

The punch of the metal drawing die is relatively less frequently repaired, and it is broken due to failure. Therefore, in order to ensure that the metal drawing die has sufficient rigidity, the die and the unloading plate should be guided by the small guide posts on the four fixed punch fixing plates to ensure the uniformity of the punch gap, and multiple small punch guides. , The discharge screw on the discharge plate should adopt the same height sleeve to ensure the smooth punching.

The bottom of the effective cutting edge of the concave die is completely hollowed out or vacuum adsorption is used to ensure smooth discharge of punching waste; in addition, the punch edge of the metal drawing die should be ground regularly to ensure its sharpness; when the metal drawing die is not in use , You should apply anti-rust oil to the working part in time, but it should be noted that when you use the hardware stretching mold next time, you should first clean it, and then use oil-absorbing paper to test the flushing until the oil is absorbed cleanly, otherwise it will affect the plating quality. When moving the metal drawing die, it should be light, steady and slow to avoid shock and severe vibration. When storing, there should be a fixed position to control the air humidity, and it should not be placed directly on the shelf or metal stretching die.

The above are the two brothers’ methods for the maintenance of metal stretching molds. Correct use and maintenance can not only guarantee the service life of the metal drawing die, but also the quality of the final product. Therefore, it is still very necessary. If you have any questions about the maintenance of metal drawing dies, you can consult our manufacturers!

Several commonly used stamping die finishing methods

1. Method of finishing stamping die
1. Manual grinding and polishing

Traditional mold surface processing methods mainly rely on the experience and technology of operators. Manual polishing is time-consuming and inefficient. Some complex surfaces or joints are difficult to handle.

2. Mechanical finishing, grinding

Commonly used grinding equipment includes surface grinders, internal and external circular grinders and tool grinders. To ensure that, CNC machining is generally used. Choose the appropriate type of grinding machine according to the shape of the different parts, choose the surface grinder for plate parts, and use the internal and external cylindrical grinder or tool grinder for the curved and turning surface parts.

3. Machining, CNC milling machine

Among them, the surface processing method of stamping die not only has fast processing efficiency, but also has good processing quality. Except for the inner acute angle cavity and the extremely narrow cavity, it can be competent in other aspects. It has become the mainstream process of stamping die processing abroad, and my country is also actively developing it.

4. There are also some non-mechanical finishing methods, such as: ultrasonic machining, EDM polishing, laser finishing, chemical polishing, electrochemical polishing, etc.

Stamping die processing manufacturers also need to have more characteristics of stamping dies and the difficulty of machining accuracy. Choosing the appropriate finishing method can save costs and effectively improve production efficiency. Zhejiang Baifudu Electromechanical is a mold processing manufacturer that produces stamping dies, continuous stamping dies, metal stamping dies, continuous dies, school tool dies, etc. Friends who need to process dies are welcome to contact us!