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由于厚板冲压毛坯具有比铸造、锻造等毛坯重量轻,强度比高,耐疲劳性好,加工方便,生产周期短,省材,成本低,并且能加工出用其他方法无法加工的复杂形状零件等优点,因此,在国外很多发动机制造公司非常重视这一技术,凡发动机机匣的内外安装边,需要通过切削加工的薄壁筒形件,锥简形件和曲面形筒件等,几乎都采用厚板冲压毛坯来加工。厚板冲压成形与薄板冲压成形有许多不同点。合理选择拉深成形的冲模间隙和凹模圆角半径,对于厚板的拉深成形能否顺利进行具有决定性的意义。下面是有关厚板拉深成形时冲模间隙和凹模圆角半径的确定方法:
As the thick blank stamping blank than casting, forging and other lightweight, high strength ratio, fatigue resistance, processing convenience, short production cycle, saving material, low cost, and can be processed by other methods can not be processed complex shape parts Therefore, many foreign engine manufacturing companies attach great importance to this technology, where the engine casing inside and outside the installation side, the need to cut through the processing of thin-walled cylindrical parts, conical parts and curved surface of the cylinder shape, almost all Thick plate stamping rough to processing. Slab stamping and sheet metal stamping have many different points. Reasonable choice of deep drawing forming die gap and die fillet radius, for the thick plate forming can be carried out smoothly decisive significance. Here’s how to determine the die clearance and die fillet radius for thick-plate deep drawing: