It’s not difficult to know these points for making stretch parts

There are many types of stamping parts, and drawing parts with more technical content are considered one of them; why drawing parts are more difficult, depending on the characteristics of the product, design is also a difficult point, after the design is successful, the trial mold is also considered difficult; It usually takes an experienced designer to design a mold with a reasonable structure, and an experienced molder is required to complete the mold trial! There are many factors that determine whether a stretched part is qualified. In addition to the above two points, there are also the choice of materials and presses. The author will introduce to you: Material selection: In addition to the design factors, the biggest problem of stretched parts It will also appear in the material. The reasonable selection of raw materials has made the mold successful by one third; the materials usually suitable for stretching are: ordinary carbon steel can be Q215, Q235, SPHC, etc.; the carbon content for deep drawing is low High-quality carbon steels such as 08, 08AL, 08F, No. 10 steel, No. 15 steel, No. 20 steel, ST12, ST13, etc.; Calculated size: For circular tensile parts, the blank size calculation principle is based on the volume of the material. When calculating, the material will become thinner during the stretching process, but the total volume will not change. For stretched parts with complex shapes, the calculation method will be more cumbersome, because the shape change is accompanied by the material thickness change, and the three-dimensional The software can only do auxiliary work, and it is difficult to achieve the expected effect; it can only reach the qualified size through continuous mold trials by the molder; stretch coefficient: how many steps are needed in the production of stretched parts, and each stretch is stretched The height and size are calculated by coefficients. Different stretched parts, structures and processes are not the same, and the factors that affect the stretch coefficient are: mold structure, stretching method, stretching times, material thickness, mold lubrication Etc., if cracking occurs during mold trial, you can try to increase lubricating oil. For parts that are stretched multiple times, hardening will occur after each stretch. Consider annealing before stretching to improve the plasticity of the material. The above article comes from 18 years of hardware stamping parts processing and automobile stamping parts customization () corporate original, please indicate the source for reprinting. [Related recommendation] Learn more: How much do you know about new energy automobile stamping parts? Learn more: Experience sharing in the stamping processing industry Learn more: How to draw a drawing of precision metal stamping parts, please understand these steps