How to solve the stability of die and stamping?

In the design and manufacture of molds, how to improve the stability of molds has become a practical problem faced by mold manufacturing enterprises. In the stamping and forming process, because each stamping plate has its own chemical composition, mechanical properties and characteristic values closely related to stamping performance, the performance of stamping materials is unstable, the fluctuation of the thickness of stamping materials, and the changes of stamping materials not only directly affect the accuracy and quality of stamping and forming processing, but also may lead to damage to the die.

Taking drawing beads as an example, they occupy a very important position in stamping and forming. In the process of stretch forming, the forming of the product needs to have a certain size and a properly distributed tensile force along the fixed perimeter, which comes from the force of the stamping equipment, the deformation resistance of the material at the edge, and the flow resistance on the edge of the rim plate. However, if the flow resistance is only generated by the effect of the pressing force, the friction between the mold and the material is not enough.

For this reason, it is also necessary to set up the tensile rib that can produce greater resistance on the edge pressing ring, so as to increase the resistance of the feed, so that the material produces a larger plastic deformation, so as to meet the requirements of the plastic deformation and plastic flow of the material. At the same time, by changing the size and distribution of the resistance of the tensile ribs, and controlling the speed of material flow to the mold and the amount of feeding, the tensile force and its distribution in each deformation area of the tensile parts can be effectively adjusted, so as to prevent quality problems such as cracking, wrinkling, and deformation of the product during tensile forming. It can be seen from the above that in the process of formulating the stamping process and die design, the size of the tensile resistance must be considered, and the tensile ribs must be arranged and the form of the tensile ribs must be determined according to the change range of the pressing force, so that each deformation area can be formed according to the required deformation mode and deformation degree.

If we make a summary, in order to solve the problem of mold stability, it is necessary to strictly control the following aspects:

In the process formulation stage, through the analysis of the product, the possible defects of the product in the manufacturing are predicted, so as to formulate a stable manufacturing process plan;

Implement the standardization of the production process and the standardization of the production process;

Establish a database and continuously summarize and optimize it; With the help of the CAE analysis software system, the optimal solution is derived.

The mold may be unstable after a long time, if the time is not long, as long as the positioning is correct and stable, the operation in place will generally be very stable, and many times the instability of the stamping parts is related to the positioning.

It depends on the punch, as well as the speed.

In terms of mold, see if the parts are loose, and it is really not possible to refill the mold.

How to improve the stability of the mold has become a practical problem faced by mold manufacturing enterprises.

In the design and manufacture of molds, the experience and skills of designers play a key role. Whether the design is reasonable or not can be confirmed through mold trial; The mold needs to go through multiple mold trials and repeated modifications before it can be finally completed.

In production practice, once some molds are put into use on the production line, they often produce various problems, which cannot meet the production requirements or technical requirements of the product, resulting in abnormal shutdown of the production line, etc., bringing many unstable factors.

Stability is divided into process stability and production stability. Process stability refers to the process scheme that meets the stability of qualified products; Production stability refers to the production capacity with stability in the production process.

Because most of the domestic mold manufacturing enterprises are small and medium-sized enterprises, and a considerable part of them are still in the traditional workshop-style production management stage, often ignoring the stability of the mold, resulting in long mold development cycle, high manufacturing cost and other problems, seriously restricting the pace of development of enterprises.

Let's take a look at the main factors that affect the stability of mold and stamping, namely: the use of mold materials; Strength requirements for mold structural parts; stability of stamping material properties; fluctuating characteristics of material thickness; the range of variations in the material; the amount of resistance of the tensile ribs; the range of variation of the crimping force; lubricant selection, etc.

How to reasonably select mold materials has become one of the most important tasks in mold design. As we all know, there are many kinds of metal materials used in stamping dies, and the requirements and selection principles of materials are not the same due to the different roles played by various parts in the mold. Therefore, when selecting mold materials, in addition to requiring the materials to have high strength, high wear resistance and appropriate toughness, the characteristics and output requirements of the processed product materials must also be fully considered, so as to meet the stability requirements of mold forming.

In order to solve the problem of mold stability, it is necessary to strictly control the following aspects:

1.In the process formulation stage, through the analysis of the product, the possible defects of the product in the manufacturing are predicted, so as to formulate a stable manufacturing process plan;

2.Implement the standardization of the production process and the standardization of the production process;

3.Establish a database and continuously summarize and optimize it;

4.With the help of the CAE analysis software system, the optimal solution is derived.

Summary. 1. Accurately calculate whether the stamping parts conform to the manufacturing process and workability of the stamping die, the design of the mold should be reasonable, and a relatively reasonable structural scheme should be selected as much as possible.

2. Pay attention to the engineering design scheme of the stamping die, there are many factors that need to think about the problem, such as the applicability and safety of the structure of the stamping die, the selection of stamping die materials, the machinability of stamping die parts and the maintenance of stamping die.

3. The reasonable use and maintenance of the stamping die is also an important factor to improve the quality of the stamping die, and the unreasonable use and maintenance may shorten the service life of the stamping die.

4. Surface treatment of the main forming parts of the stamping die of metal stamping parts can improve the wear resistance of the surface of the stamping die and better improve the quality of the stamped things.

5. The processing method and machining accuracy in the manufacturing process of the stamping die will also affect the service life of the stamping die.

How to ensure the stability of product quality in the processing process of stamping die?

1. Accurately calculate whether the stamping parts conform to the manufacturing process and workability of the stamping die, the design of the mold should be reasonable, and the relatively reasonable structural scheme should be selected as far as possible. 2. Pay attention to the engineering design scheme of the stamping die, there are many factors that need to think about the problem, such as the applicability and safety of the structure of the stamping die, the selection of stamping die materials, the machinability of stamping die parts and the maintenance of stamping die. 3. The reasonable use and maintenance of the stamping die is also an important factor to improve the quality of the stamping die, and the unreasonable use and maintenance may shorten the service life of the stamping die.

4. Surface treatment of the main forming parts of the stamping die of metal stamping parts can improve the wear resistance of the surface of the stamping die and better improve the quality of the stamped things. 5. The processing method and processing accuracy of the rest of the stamping die will also affect the service life of the stamping die.

How can we ensure the stability of the quality of the processed products? What should be paid attention to in the design and production of molds?

1.The design of the glue point should be convenient for the product to quickly fill the cavity. 2.

The demoulding angle of the product is recommended to be more than 1 degree under the conditional allow, so as to facilitate the normal demoulding of the product. 3.It is advisable to choose the direction of the large projection area of the product as the direction of molding and pressurization, which is convenient for the rapid filling of materials and the pressure retention of the bibi.

4.It is not advisable to use the thin-walled inserts on the mold as the molding pressure area to prevent the thin-wall from deforming. 5.

Eject the enlarged area, and the ejector pin should be placed in the corner, because the corner has the greatest tightening force. 6.When the life of the mold is required to be 300,000 molds, the front and rear mold cores need to be heat treated, and the processing method of hard mold is used.

7.In the design, the cooling channel of the front mold should be closer to the product, so that the product can be cooled better and prevent the product from sticking to the front mold. 8.

In the area with high precision of the product, or the area with uneven glue level, it is recommended to make inserts to facilitate the size adjustment and deformation adjustment of the front Zenmeng.

2.+What are the factors of stamping die that cause +90° + molding is not in place, how to deal with it?

Hello: There are the following situations: positioning offset, adjustment positioning, unilateral molding, pulling materials, increasing the pressing force, adjusting the positioning design errors, making Chang trapped into uneven knife cutting, resistant to re-wire cutting edge knife edge inserts.

Stamping die: It is a special process equipment that processes materials (metal or non-metal) into parts (or vertical semi-finished products) in cold stamping processing, which is called cold stamping die (commonly known as cold stamping die).

Summary. Hello pro for you to find out.

1. Gating system and overflow system.

1) Requirements for the mold sprue on the cold chamber horizontal die-casting machine: The diameter of the press chamber should be selected according to the required specific pressure and the filling degree of the chamber, and at the same time, the inner diameter deviation of the gate sleeve should be appropriately enlarged by a few wires compared with the deviation of the diameter of the pressure chamber, so as to avoid the problem of punch jamming or serious wear caused by the different shafts of the gate sleeve and the diameter of the press chamber, and the wall thickness of the gate sleeve should not be too thin. The length of the sprue sleeve should generally be smaller than the ejection lead of the injection punch so that the paint can be removed from the chamber.

The inner hole of the pressure chamber and the gate sleeve should be finely ground after heat treatment, and then ground along the axis direction, and its surface is rough. The sink and the cavity that forms the paint have a recess depth equal to the depth of the cross sprue, and its diameter is matched with the inner diameter of the gate sleeve, and it has a 5° slope along the demoulding direction. When a coated sprue is used, the volume of the effective length of the chamber is shortened, and the filling degree of the chamber can be improved.

What are the precautions for the problems commonly encountered in die casting production?

Hello for you to inquire about the problems of molds often encountered in die-casting production Note: 1. Gating system and overflow system (1) Requirements for mold sprue on the cold chamber horizontal die-casting machine: The diameter of the pressure chamber should be determined according to the required specific pressure and the fullness of the pressure chamber, and at the same time, the inner diameter deviation of the gate sleeve should be appropriately enlarged compared with the deviation of the diameter of the pressure chamber, so as to avoid the problem of punch jamming or serious wear caused by the different shafts of the gate sleeve and the inner diameter of the press, and the wall thickness of the gate sleeve should not be too thin.

The length of the sprue sleeve should generally be smaller than the ejection lead of the injection punch so that the paint can be removed from the chamber. The inner hole of the pressure chamber and the gate sleeve should be finely ground after the hot place is destroyed, and then ground along the axis, and its surface is rough. The sink and the cavity that forms the paint have a recess depth equal to the depth of the cross sprue, and its diameter is matched with the inner diameter of the gate sleeve, and it has a 5° slope along the demoulding direction.

When a coated sprue is used, the volume of the effective length of the chamber is shortened, and the filling degree of the chamber can be improved.

2) Requirements for the mold cross-sprue: The entrance of the cold horizontal mold cross-sprue should generally be located in the upper part of the pressure chamber with an inner diameter of 2 3 or more, so as to avoid the molten metal in the pressure chamber from entering the cross-sprue prematurely under the action of gravity and starting to solidify in advance. The cross-sectional area of the sprue should be gradually reduced from the sprue to the inner gate, and in order to expand the cross-section, negative pressure will occur when the molten metal flows through, which is easy to inhale the gas on the parting surface and increase the eddy current wrapping gas in the flow of molten metal.

Generally, the cross-section of the outlet is 10-30% smaller than that of the inlet. The sprue should have a certain length and depth. The purpose of maintaining a certain length is to play the role of stabilizing the flow and guiding.

If the depth is not enough, the molten metal will cool down quickly, and if the depth is too deep, the condensation will be too slow, which will not only affect the productivity but also increase the amount of recharge. The cross-sectional area of the cross-sprue should be larger than the cross-sectional area of the inner gate to ensure the speed of metal liquidation. The cross-sectional area of the main cross-sprue should be greater than the cross-sectional area of each branch cross-sprue.

The bottom two sides of the sprue should be rounded to avoid early cracks, and the two sides can be made with an inclination of about 5°. The surface roughness of the sprue part.

The ways to improve the durability of metal stamping dies are:

1) Choose pure die steel, which can effectively improve the life of metal stamping die;

2) Choose high-alloy die steel, such as: SKD11 die steel, DC53 die steel, D2 die steel; It can greatly extend the life of metal stamping dies;

3) Choose high-quality vacuum heat treatment manufacturers to completely eliminate mold stress. It can effectively guarantee the life of metal stamping dies;

4) Reasonable mold design and reasonable mold structure can ensure the life of metal stamping dies;

5) Improve the accuracy of mold fitting, which is of great help to prolong the service life of metal stamping die;

6) The selection of high-quality guide pillar guide sleeve can ensure the accuracy of the mold and promote the service life of the metal stamping die;

It mainly depends on what products you punch and what materials you use to make molds.