Automotive stamping die design principles

Combining Changdong's many years of mold design and manufacturing experience, car cover design for car cover should follow the following basic principles:

(1) It is critical to determine the reasonable direction of the press in combination with the product shape of the part and the test basis of the product. Whether the stamping direction design of the car cover is reasonable or not determines whether the satisfactory cover product can be stretched, and directly affects the number of the process replenishment part and the shape of the press face and the hardness and service life of the car mold.

(2) The shape of the contoured press surface of the mold must be determined. The shape of the binder surface formed by the stretch forming of the cover member is the primary condition for ensuring that the material does not break and form smoothly during the stretching process. In order to achieve this purpose, the pressing surface should be formed with a certain inclination angle to reduce the stretching depth, and at the same time, a flat pressing surface is formed to achieve an optimum pressing effect. It is also necessary to maintain a certain geometric relationship through the shape of the pressure ring and the punch, so that the material is always in tension during the stretching process, and can smoothly adhere to the punch, and no excess material is allowed to wrinkle, and the optimum pressing effect is maintained. . In order to ensure smooth and smooth pressing surface, the wool flows into the concave mold cavity, and the pressing surface must not have local bulges, pits and depressions. If the pressing surface is the flange of the tensile member itself and there are protrusions and depressions on it, the shaping process should be added. When the angle between the binder surface and the punching direction is greater than 90°, the feed resistance is increased, so it is not preferable.

Dongguan Changdong Mould Co., Ltd. specializes in the design and manufacture of stamping dies, and develops and manufactures metal stamping dies for automotive molds and home appliances within 4 meters.

(3) The determination of the supplementary surface of the stamping process must be sufficient. The process replenishment surface is both a condition for achieving stretching and a necessary supplement for increasing the degree of deformation and increasing the rigidity of the part. It will directly affect the stretch forming and subsequent trimming, shaping, flanging and other processes.

4) Automotive mold design must be integrated. For the design of the deep-drawing die of the car cover, it is necessary to combine the future process and make a reasonable overall plan. The design scheme of the multi-secondary die should be adopted to reduce the number of advances under the premise of ensuring the amount of springback and surface quality of the product as much as possible. To help companies reduce mold manufacturing costs, maintenance costs, and improve production tempo.

Automotive mold design concerns

Car cover design for car cover must also pay attention to these points of attention:

(1) Rounded corner and straight line design of the tensile member. When the tensile member has rounded corners and straight portions, the tensile rib is set in the straight portion to balance the feeding speed; if the tensile rib is set in the shallow portion of the straight portion of the tensile member, the deep deep straight portion It is not necessary to set the stretching ribs.

Dongguan Changdong Mould Co., Ltd. specializes in the development and manufacture of stamping dies, which can design and process automotive moulds and home appliance metal stamping dies within 4 meters.

(2) Design of inner and outer rings of automobile molds. Tensile ribs shall be provided for the rounded and straight portions of the shallow tensile members, but only one tensile rib may be provided for the rounded portion, and 1-3 tensile ribs may be provided for the straight portion; if there are multiple stretching ribs When it is, it should be "outer loose inside", that is, the outer ring of the mold is looser, and the inner ring of the mold is "tight", so that the height can be achieved by changing the height of the stretched tendon.

(3) The profile of the stretch rib should be in the shape of a convex and concave curve. A width stretching rib should be set in the convex curve portion. However, the tensile ribs may not be provided in the concave curve portion; the tensile ribs or the stretching ridges should be as close as possible to the rib mold corners, which can increase the material utilization rate and reduce the size of the mold profile, but it is considered not to affect the trimming dies. Strength of.