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冷冲压时,可能由于操作者在工作中的粗心大意或其他过失,工作地不清洁,供应的材料质量不符合要求,冲压模具有毛病,违反了规定的工艺规程,以及制成品和半成品的保管和运输不善等而产生废品。冲压的毛坯在挡料件或定位件内安放的不正确,可能导致冲压成的工件外形冲掉,或破坏了工件外形和内形之间的正确位置。工作地脏污和不整洁,弄脏了冲模和材料,由于这个原因可能使冲压成的工件产生凹陷及划痕。材料的物理机械性质、厚度和表面质量不符合规定构技术条件时,在过伸过程中,即可能产生裂纹和断裂,及出现粗糙的表面。由于冲模设计或制造不合适,安装或调整不正确,磨损或崩落,致使冲压出的工件得不到正确的形状和尺寸,在延伸
Cold stamping may be due to carelessness or other negligence on the part of the operator during work, unclean working conditions, unsatisfactory quality of the material supplied, defective stamping dies, violation of prescribed process instructions, and the presence of finished and semi-finished products Waste and poor transportation, etc. produce waste. Incorrect placement of blanked blanks in the stop or retainer may cause the stamped part to flush out or destroy the correct position between the part and the part. Dirty and untidy work, dirty dies and materials, for which reason the stamped work piece may be sunken and scratched. Material physical and mechanical properties, thickness and surface quality does not meet the requirements of technical conditions, in the process of over-stretching, cracks and ruptures may occur, and the appearance of rough surface. Due to improper design or manufacture of the die, improper installation or adjustment, wear or caving, resulting in the workpiece is not punched the correct shape and size, in the extension