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采用短芯棒冷拔钢管,主要目的是使钢管的壁厚减薄,同时钢管直径也要减小,其拔制表的编制除了考虑钢管的延伸系数外,还必须对于减径量与减壁量之间的关系给予足够的重视。但是,在已知的钢管拔制理论中,有关这一问题未见有明确的计算公式。实际上,减径量与减壁量之间的关系正确与否,对钢管拔制力的大小及对钢管表面质量影响极大,严重时,甚至使拔制钢管无法进行。
The use of short mandrel cold drawn steel pipe, the main purpose is to thin the wall thickness of steel pipe, pipe diameter also should be reduced, the preparation of the drawing table in addition to considering the extension factor of steel, but also for the reduction and reduction of wall The relationship between quantity gives sufficient attention. However, in the known pipe drawing theory, there is no clear formula for this problem. In fact, the relationship between the amount of reduction and the amount of reduction of the wall is correct or not, the size of the steel pipe pulling force and the impact on the surface quality of the steel pipe is extremely serious, and even make the pipe can not be drawn.