Common problems and solutions in the production process of stamping drawing parts

Stamping and drawing parts are thin-walled drawing parts of box, cone, cylinder or other complex shapes from a certain shape of flat material through a stamping and drawing process. They are widely used in electrical appliances, instruments, automobiles, aerospace And so on in various industries. When stamping companies produce stamping and drawing parts in large quantities, various problems will occur, which affect the quality of the products. Let's take a look at the common problems and their corresponding solutions. 1. The reason for the flange instability and wrinkling of the stretched part: the blank holder force is too small, or the relative thickness of the blank is small, or the stretch coefficient is too small. Solution: Increase the blank holder force or increase the number of stretches. 2. The reasons for the surface strain of stamping and drawing parts: low heat treatment hardness, poor finish, improper material selection, excessive material thickness, die fillet wear, poor surface quality of bending blanks, unreasonable process plan selection, lack of lubrication, etc. Solution: For stamping parts that need to be stretched multiple times, under the premise of ensuring the necessary appearance quality, there are traces that can occur during the stretching process. Choose appropriate materials and process plans to lubricate and reduce friction. 3. The reason for the inconsistency of the shape and size of the stamping and drawing parts: In addition to taking measures to reduce springback caused by inaccurate positioning, the reliability of the positioning of the blank should also be improved. Solution: The processing shape of stamping and stretching should be as simple and symmetrical as possible, and the shape should be stretched and formed at one time as much as possible. 4. The hole of the tensile member with holes is stretched and cracked. The reason: the hole diameter is too large, so that the material around the hole is subjected to high tensile stress, resulting in cracking. Solution: Change the forming process sequence, stretch forming first, and then punch holes at the bottom. 5. The reason for the wrinkle and instability of the upper edge of the cylindrical stretched part: the radius of the round corner of the die is too large, which causes the gap between the die and the punch to be too large, or the blank holder force is too small. Solution: Increase the blank holder force and reduce the fillet radius of the die. [Recommendation] Learn more: How to ensure the stability of stamping parts production Learn more: Do you know the purpose of the motor housing? Learn more: Technical standards for stamping processing