New mold development process for automobile mold design

It is more reasonable that a relatively complete design and mold trial process should be focused on the following points. And it is suitable for all stages and different types of mold design, as follows:

1. Don't rush to paint when you get the product. You should understand the product structure, understand the product's dimensional accuracy requirements, product material types, whether there is a clear stamping direction, and the number of products.

2. When preparing the process, it is best to use simulation analysis software such as AF or DF for analysis, so as to obtain specific parameters to facilitate communication with customers. At the same time, it can also understand the rationality of the product process before opening the mold and reduce testing. Modular period. (Note: If the customer has opened a similar mold before, it is best to have drawings and files for reference)

3. In the design of automobile molds, the design essentials of continuous molds give priority to floating material structure and must ensure smoothness. Because automobile parts are generally larger and thicker, the material belt will be heavier. If the final material belt cannot float due to improper considerations, it will be a fatal problem.

4. When the size of the product has special requirements or the tolerance level is high, the mold structure that completes this process should be made as movable and adjustable as possible to facilitate the subsequent shifting of the mold.

5. In order to ensure uniform force and elastic force, the elastic components in the automobile mold generally use nitrogen gas springs. However, the number of springs needs to be discharged according to the CAE analysis of the pressing force value.

If the springs in the mold are arranged too densely, the product is easy to crack, and the tonnage of the press needs to be increased accordingly. If the spring is too small, the product is prone to wrinkles.

6. When the mold design stage is completed and processed, mold clamping and debugging are required. The first clamping of the tryout fitter needs to pay special attention to the upper and lower clamping speed, especially when there is a stretching process. Need to put a fuse to detect the height of the material thickness, and then load the material after ensuring that the height is equal to the material thickness.

7. Note that when the product is tested, the reference hole and reference surface of the part must be completely consistent with the mold surface before the product can be placed on the inspection machine to test the size or send the CMM for 3D report, otherwise the test will be meaningless .

8. When closing the mold, it is necessary to ensure that the mold fit rate tested by Hongdan is above 80%, before opening the cutting and making CMM reports. In special circumstances, such as the reference hole and reference surface coordination is already very OK, and the product is already stable, the fit rate level can be appropriately reduced. But no matter what, Hongdan inspection must be done, otherwise the problems in the later stage of the trial model will not be solved.

Nine. Proofing specification: use laser tape to get shape and shape proofing to meet 100% customer requirements. Before starting the laser tape, the mold structure must be adjusted to ensure the product is stable and the dimensional tolerances are qualified, otherwise it is meaningless. (It can also be threaded and cut)

10. For products that are very complex, 3D laser products are required. Before proceeding with 3D laser, the 3D drawing of the product must be completed, using the form of CNC dotting for positioning and then sending the laser, and the laser also needs to add sand for positioning.

There is no unified standard and specification for the new mold from mold opening to mold trial. Most of them are exploring and improving gradually. Therefore, it is of great benefit to pay more attention to other people's technology.