Process characteristics of drawing parts-precision

Dongguan Precision Electronic Technology Co., Ltd. was established in January 2008. It is a professional ODM/OEM manufacturer specializing in the design and manufacture of precision stamping dies and precision hardware stamping. Today, we will explain the technical characteristics of the stretched parts: the stretched parts are formed by die stamping, with beautiful appearance, energy saving, high brightness, colorful colors, diverse changes, vibration resistance, long life and so on. If the stretched parts are poor in manufacturability, the stretched parts must be redesigned to stretch out qualified products. Difficulty in feeding is generally caused by too much feeding resistance on the pressing surface. If the surface roughness value of the blanking surface and the die fillet is too quotient, or there is reverse forming, and the local stretch is too large, you must adjust the outer slider to reduce the blank holder force, appropriately increase the die fillet, and reduce the surface Maggot building degree value and increase the gap between stretch ribs and grooves. If the local stretching deformation is too large and there is inverse forming, it is necessary to adopt the method of adding process codes or process holes. The stretched part mold is generally wrinkled and cracked during the first trial pull. At this time, it is necessary to carefully observe the environment of the dividing and pressing material surface and analyze the various causes of wrinkles and cracks. If there are indentations on the pressing surface and cracks at the radius of the die fillet, it is difficult to feed; if the pressing surface is corrugated, it is easy to start feeding. Later, because of the formation of corrugations, it is difficult for the material to flow, resulting in wrinkles. Cracking, that is to say, the difficulty of material flow during the stretching process will cause wrinkling and cracking of the stretched part, so different environments must be solved by different methods. Features: The stretched parts are formed by die stamping, with beautiful appearance, energy saving, high brightness, bright colors, diverse changes, anti-vibration, long life, etc. The fillet radius between the flange and the wall of the stretched part: 4x#f I/h.v0 The fillet radius between the flange and the wall of the stretched part should be greater than 2 times the plate thickness, that is, r2≥2t, in order to To make the stretching go smoothly, generally r2u003d(5~10)t, and the radius of the large flange should be less than or equal to 8 times the plate thickness, that is, r2≤8t. Purpose: Wrap the stretch film on the pallet items to achieve the effect of wrapping and binding, the items and the pallet become one body, and it is not easy to scatter. The fillet radius between the bottom of the drawing piece and the straight wall should be greater than the plate thickness, that is, r1≥t. In order to make the stretching go smoothly, r1u003d(3~5)t is generally taken, and the radius of the large fillet should be less than or equal to 8 times the plate thickness, that is, r1≤8t. Feeding is easy mainly because the feed resistance of the pressing surface is too small, the contact of the pressing surface is not good, or the designed stretch parts are poor in manufacturability. If it is the problem of the blanking surface, the blanking surface should be researched to ensure full contact. In addition, the outer slider should be adjusted to increase the blanking force or increase the blanking area. If the stretched parts have poor manufacturability, the stretched parts must be redesigned to stretch out qualified products. Committed to becoming the world's most professional supplier of electronic stamping parts. It is our responsibility to assist customers to enhance their competitiveness!