采用短芯头冷拔钢管主要目的是减壁,同时也必需减径。过去我们在编制拔制表时只是考虑钢管的延伸系数(μ),而对于减径量(ΔD)与减壁量(ΔS)之间的关系很少考虑。在已知的钢管拔制理论中,有关这一问题也未见明确叙述。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 The main purpose of using short core cold-drawn steel pipe is to reduce the wall, but also reduce the diameter. In the past, we only considered the extension factor (μ) of the steel pipe in the preparation of the drawing table, and the relationship between the reducing quantity (ΔD) and the reducing quantity (ΔS) was seldom considered. In the known pipe drawing theory, there is no clear statement on this issue. In fact, the relationship between the amount of reduction and reduction of the amount of the wall is correct or not, the size of the steel pipe pulling force and the surface quality of steel