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锻压加工
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锻压加工
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工学
锻压加工
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forging and stamping
锻压加工
对坯料施加外力,使其产生塑性变形,改变尺寸、形状及改善性能,用以制造机械零件毛坯或工件的塑性加工技术。是锻造与冲压的总称,属于二次塑性加工。锻压加工是利用一次塑性加工(轧制、挤压及拉拔等)所提供的棒材、板材、型材、管材及线材进行再加工,但在大型锻件生产时可直接用铸钢锭为原料。在锻造加工中,坯料整体发生明显的塑性变形,有较大量的塑性流动。在冲压加工中,坯料主要通过改变各部位面积的空间位置而成形,其内部不出现较大距离的塑性流动。
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