4 matters needing attention in stamping and stretching

The technical content of stamping and drawing parts is higher than that of ordinary stamping parts, and the process is more complicated. In the stamping and drawing process, there are many aspects that need our stamping parts company to pay attention to. Guangdong Precision can customize all kinds of stainless steel drawing parts, shell drawing parts, thinning drawing parts and deep drawing parts, and take you to understand the 4 precautions of stamping and drawing. 1. Stamping and drawing parts should not be placed for a long time in the deep drawing process. The material will usually undergo work hardening, which increases the material's resistance to deformation and reduces its plasticity. For example, stainless steel has serious work hardening and large residual stress. Deep-drawn parts need to be annealed to eliminate stress, and it must be done as soon as possible, otherwise cracks will appear at the mouth of the deep-drawn parts. After drawing, products made of hard materials such as copper that have not been heat-treated cannot be stored. 2. Blanks with scars should not be stretched. Some deep-drawn parts have high requirements on the surface quality, such as stainless steel products and automobile shells. If a rough surface with dents or scratches is used for deep drawing, these defects will remain on the product without exception, or even expand, which will adversely affect the subsequent process and increase costs. 3. Stretched stainless steel can not produce scratches. With the improvement of people's living standards, a large number of deep-drawn stainless steel products are used in modern kitchen and bathroom equipment. Such as washing tanks, microwave oven shells, and inner tubes of agricultural washing machines. These products have high requirements on the appearance of stainless steel products. When drawing stainless steel, it is easy to stick to the mold, which will affect the quality of the product. Therefore, it is necessary to lubricate the drawing of stainless steel. The mold material is made of soft material, and the stainless steel plate is also pasted with a protective film for deep drawing. After stretching, the film is torn off, which can reduce the strain on the stainless steel product. 4. The drawing depth of stainless steel should not be too large. Stainless steel materials are not easy to stretch because they have high tensile strength and strict work hardening, especially in the case of multiple stretching. Many practices have shown that the thickness anisotropy index R and hardening index n of the material greatly affect the ultimate tensile coefficient of the material. The larger the value of R and n, the better the tensile properties of the material. In short, the deep drawing of stainless steel has its particularity, it is usually not suitable for deep drawing, otherwise it is easy to break. [Related Recommendations] Learn more: Precision の corporate culture Learn more: Continuous improvement and innovation are the key factors for the survival of a stamping company. Learn more: Stamping processing. Slow-moving wire is more accurate than fast-moving wire?