Common problems and solutions in the production of metal stamping and drawing parts

Metal stamping parts and deep drawing parts can be seen everywhere in our daily life. During the mass production of metal stamped and deep drawn parts, various problems arise for various reasons. In this article, the editor of Zhejiang Baifudu Electromechanical shares the common problems and solutions in the production process of metal stamping and drawing parts.

1. The shape and size of metal stamping and drawing parts do not match

The main reason for the inconsistent shape and size of metal stamping and drawing parts is springback and inaccurate positioning. In addition to taking measures to reduce springback, the reliability of blank positioning should also be improved.

2. Surface strain of metal stamping and drawing parts

The surface strain of metal stamping and deep drawing parts is caused by improper material selection, low heat treatment hardness, poor finish, concave die fillet wear, poor surface quality of curved blanks, excessive material thickness, unreasonable process plan selection, and insufficient lubrication. of.

3. Bending cracks in metal stamping tensile parts

(1) When the angle between the bending line and the direction of the embossing of the sheet does not conform to the specified layout, when bending in a one-way V shape, the bending line should be perpendicular to the direction of the embossing; when bending in two directions, the bending The direction of bending and embossing is preferably 45 degrees.

(2) The plasticity of the tensile material is poor.

(3) The bending radius is too small and the pickling quality is poor.

(4) Insufficient lubrication – larger friction.

(5) The radius of the convex and concave die is worn or the gap is too small – the feeding resistance increases.

(6) The quality of the shearing and punching sections of the stretched blank is poor – burrs, cracks.

(7) The material thickness is seriously out of tolerance – feeding is difficult

solution:

1. The shape of metal stamping and drawing should be as simple and symmetrical as possible, and one deep drawing should be done as much as possible.

2. For parts that need to be stretched multiple times, under the premise of ensuring the necessary surface quality, the inner and outer surfaces should have traces that may appear during the stretching process.

3. Under the premise of ensuring the installation requirements, the side walls of the deep-drawn parts should have a certain slope.

4. The distance from the edge of the hole at the bottom of the drawing piece or the flange to the side wall should be appropriate.

5. The corner radius of the bottom and the wall, the flange and the wall, and the four corners of the rectangular piece should be appropriate.

6. The scale marking of metal stamping and drawing parts cannot mark the internal and external dimensions.

Metering pump wiring board connected to waste residue

Metering pump wiring board connected to waste residue

1. Manufacturing process: shallow drawing of cold-rolled sheet, turning end face, manganese phosphating

2. Scope of application: Marr metering pump wiring board

3. Stamping material: cold rolled sheet

4. Surface treatment: manganese phosphating

5. Dimensions: The outer diameter is 110, the material thickness is 1.0, and the 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: 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, 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.

Stainless steel stamping parts for kettle heating chassis

Stainless steel stamping parts for kettle heating chassis

1. Manufacturing process: stainless steel coil, shallow deep drawing, reverse drawing

2. Scope of application: stainless steel stamping parts for coffee machines, kettle heating chassis

3. Stamping material: stainless steel 304

4. Surface treatment: stainless steel brightener

5. Dimensions: The outer diameter is 162, the material thickness is 0.5, and the height is 10. 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, 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.

Coffee machine heating chassis stainless steel stamping processing

Coffee machine heating chassis stainless steel stamping processing

1. Manufacturing process: stainless steel coil, shallow deep drawing, reverse drawing

2. Scope of application: stainless steel stamping parts for coffee machines, kettle heating chassis

3. Stamping material: stainless steel 304

4. Surface treatment: stainless steel brightener

5. Size specifications: The outer diameter is 138, the material thickness is 0.5, and the height is 8.41. In addition, the size 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, 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.

What are the factors that affect the galvanizing of metal stampings?

1. The surface of metal stamping parts is not thoroughly cleaned, and a curing film is formed on the surface of stamping parts, which affects the normal deposition of electro-galvanizing.

2. Stamping parts have high carbon content. High carbon steel and cast iron will reduce the hydrogen evolution potential, accelerate the hydrogen evolution on the surface of the workpiece, and reduce the electroplating efficiency.

3. The stamping parts are bundled too tightly, and part of the surface is not plated in place during the galvanizing process.

4. The content of additives in the galvanizing bath is low. Low additive content will affect the dispersibility of zinc, and the coating will appear too thin in some parts.

5. Surface corrosion will also reduce the hydrogen evolution potential, accelerate the surface hydrogen evolution of stamping parts, reduce the current efficiency, and affect the deposition rate of zinc.

6. Low sodium hydroxide content. Low sodium hydroxide content reduces current density and anode passivation.

7. Anode passivation will reduce the effective area, thereby affecting the normal distribution of current.

Well, the above is the relevant content about “What are the factors that affect the galvanizing of metal stamping parts?” I hope the above content can help you.

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.

What is the difference between large and small metal stamping parts?

“Hardware stamping parts” refers to metal parts produced by physical processing such as forging, rolling, cutting, etc. of various metals such as iron, steel, and aluminum.

“Large metal stamping parts manufacturing industry” refers to the general production equipment manufacturing from the mining and refining of metal materials to the manufacture of primary metal products, and then to the manufacture of special equipment for various industries in the national economy. The metal stamping parts industry mainly becomes products through the change, processing and assembly of the physical shape of metal raw materials.

Most metal stamping products are not final consumer goods. However, as ancillary products, semi-finished products and tools used in the production process of industrial manufacturing, “small metal stamping parts” is not an existing industry category, but a cross combination of the above-mentioned metal products – metal stamping products.

In the entire manufacturing industry, the responsibility of “small metal stamping parts” is to provide parts and production tools for manufacturing enterprises, not as end-use industry-specific equipment. Nevertheless, we cannot deny the important role of “small metal stamping parts” in the social production process: “small metal stamping parts” and the manufacturing industry are intertwined as an inseparable whole.

The trend of industrial concentration in the metal stamping industry is obvious. At present, the domestic metal stamping industry is mainly concentrated in Guangdong, Zhejiang, Jiangsu, Shanghai, Hebei, Shandong and other economically developed provinces. The products of traditional metal stamping enterprises are relatively simple, and many enterprises only provide supporting facilities and accessories for other manufacturing enterprises. They are highly dependent on manufacturing companies and are slow to respond to market demands.

Traditional metal stamping enterprises do not pay attention to the research and development of new products and the extension of the market, resulting in the lack of sustainable competitiveness of enterprises. In the face of increasingly specialized market demand and increasingly fierce competition, many metal stamping companies that have developed rapidly in the initial stage are feeling weak for the future.

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.

How to adjust the stamping die gap?

1. Washer method

The gasket method is to place the paper, metal plate or forming workpiece with uniform thickness and the same gap value around the edge of the female mold, then slowly close the mold, and place an equal-height cushion so that the male mold can enter the edge of the female mold, and observe the male mold. and the gap between the die. If the gap is not uniform, adjust the gap by tapping the punch fixing plate until it is uniform, then tighten the upper die fixing screw, then put the paper into the test punching hole, and observe the blanking of the paper until the gap is uniform. Finally, after clamping the upper mold base and the fixing plate, drill and ream the dowel pin holes together, and then punch the cylindrical pins. This method is widely used in small and medium punching dies, drawing dies, bending dies, etc. It is also suitable for controlling the wall thickness of plastic molds.

2. Copper plating method

For punching dies with complex shapes and a large number of punches, it is difficult to control the gap with the above method, so a layer of soft metal (such as copper plating) can be plated on the punch surface, and the coating thickness is equal to the punching gap value on one side , and then adjust, fix and position as above. There is no need to remove the coating after assembly, and it will fall off naturally during the cutting process.

3. Coating method

The coating method is to apply a layer of enamel or amino acid paint on the surface of the punch. When painting, you should choose paints of different viscosity according to the size of the gap, or control the thickness by painting multiple times. After painting, the punch assembly should be baked in a 100120 oven for 0.5-1 hour until the thickness of the paint layer is equal to the blanking gap value, which should be uniform, and then adjusted, fixed and positioned according to the above method.

Four, light transmission method

The light transmission method is to illuminate the bottom surface with light after the upper and lower molds are closed, observe the size of the light gap around the edge of the convex and concave mold, and judge whether the blanking gap is uniform. If the gap is not uniform, adjust, fix and position. This method is suitable for thin blanking dies that require high assembly fitters. For example, it is best to use a die gap gauge for inspection and adjustment.

BMW car led light control housing

BMW car led light control housing

1. Manufacturing process: precision steel pipe, pipe cutting, cylindrical grinding, end surface grinding, galvanizing

2. Scope of application: BMW car LED light control device shell

3. Stamping material: No. 10 steel precision tube

4. Surface treatment: electro-galvanized

5. Dimensions: Outer diameter is 27.4, inner diameter is 25.7, and height is 5.8. In addition, the dimensions can be customized according to your company’s requirements. The unit price is negotiable with our company.

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, 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

All are devoted to the pursuit of quality by Balford people.

Automotive precision tube starter motor housing

Automotive precision tube starter motor housing

1. Manufacturing process: 6 meters of precision steel pipe, rotary cutting or laser cutting, flat head chamfering, flushing all gaps at one time, plastic spraying

2. Application range: Ford car starter motor, starter motor, starter motor, starter motor housing

3. Stamping material: No. 10 / No. 20 precision steel pipe

4. Surface treatment: spray plastic, but there is a place that needs to be shielded and sprayed.

5. Dimensions: The outer diameter is 74, the wall thickness is 2.5, and the height is 70. 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, 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.

Ford starter motor steel tube housing

Ford starter motor steel tube housing

1. Manufacturing process: 6 meters of precision steel pipe, rotary cutting or laser cutting, flat head chamfering, flushing all gaps at one time, plastic spraying

2. Application range: Ford car starter motor, starter motor, starter motor, starter motor housing

3. Stamping material: No. 10 / No. 20 precision steel pipe

4. Surface treatment: electrophoresis, but there is a place where electrophoresis needs to be shielded.

5. Dimensions: The outer diameter is 74, the wall thickness is 2.5, and the height is 88. 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, 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.

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 problems should be paid attention to in sheet metal cabinet processing?

1. In the process of sheet metal processing, sometimes there are too many redundant materials, and redundant materials often appear in the closed position of multiple bending edges. This is usually due to a process error or a drawing error.

2. The bending machines of some sheet metal cabinet processing manufacturers have restrictions on bending, which are mainly reflected in the height of one side and two sides. The height of one side is limited by the size of the bending machine and the height of the upper cutter. The solution is to use a large-angle polygonal bending; but the height of both sides is not greater than the height of one side, and it is also limited by the bottom edge: bending The height should be less than the bottom edge.

3. Pay attention to the edge of the sheet metal after bending. If left untreated, it will affect the strength of the sheet metal. Mainly by welding.

4. Due to the thin plate material of sheet metal parts, it is not suitable for hot-dip galvanizing. Common surface treatment methods include phosphating and electrostatic powder spraying, which are surface treatment procedures for sheet metal parts.

The above four points are the matters that sheet metal cabinet manufacturers need to pay attention to in the processing process. If you want to do a good job of sheet metal processing, you need to pay more attention to each process. Pursue better quality and provide customers with high-quality products.

What is the reason why the punch of metal stamping parts wears too fast?

1. What is the reason why the punch of metal stamping parts wears too fast during the processing?

1. The gap of the metal mold is too small. Generally, the total gap of the Jianhan mold is 20%-25% of the thickness of the material plate.

2. The concave mold is not conducive to neutrality, including defects such as mold base, mold assembly and rotary tower insert sleeve.

3. The temperature of the first simulated test is too high, which is mainly caused by the long-term continuous stamping of the same mold.

4. Improper grinding method of die edge will lead to annealing and increase wear.

5. For local single-sided punching, such as step punching, punching angle or shearing force, the lateral force of the aluminum alloy door and window components will cause the punch to deviate to one side, reducing the edge gap, resulting in serious punching. Die wear. If the installation accuracy of the machine tool die is not high, the punch will deflect to the upper die, thereby damaging the punch and the die.

6. The raw materials you buy may be defective.

7. Usually there is no machine maintenance and so on.

Well, the above is the relevant content of “Is the punch of metal stamping parts worn too fast?” I hope the above content can help you!