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本文运用爆炸型快速落刀装置“冻结”切削的技术,以及切削力和显微硬度的测定,在氖气和空气中切削的对比等方法,对钛合金车削过程切屑形成的机理及其难加工的主要原因作了探讨。 文章根据实验结果对钛合金和45号钢车削过程中的几个方面进行综合分析后指出:钛合金的变形较小,加工硬化不严重,得到的是挤裂型片状切屑,其切屑形成机理与45钢带状切屑有所不同。并进一步指出产生片状切屑以及切屑形成机理不同的主要原因是钛合金强烈的化学活性。 本文认为钛合金难以加工的主要原因是它的化学活性。因此深入研究其化学作用的机理,采取适当的措施加以抑制,是有效改善钛合金切削加工性的一个重要方面。 此外,本文还就切削速度、进给量和刀具前角对钛合金车削过程中变形的影响,作了实验分析。
In this paper, using the technique of “freezing” cutting by the rapid dropping device of blasting machine, the determination of cutting force and microhardness, the comparison of cutting in neon and air, etc., the mechanism of chip formation in titanium alloy turning process and its difficult machining The main reason for the discussion. Based on the experimental results, the article analyzes several aspects in the turning process of the titanium alloy and 45 steel and points out that the deformation of the titanium alloy is small and the work hardening is not serious. The obtained chip is chip-like and its chip formation mechanism Different from 45 steel chip. It is further pointed out that the main reason for producing flake chips and different chip formation mechanisms is the strong chemical activity of titanium alloys. This paper argues that titanium alloy is difficult to process the main reason is its chemical activity. Therefore, in-depth study of its chemical mechanism, take appropriate measures to be suppressed, is an effective way to improve the machinability of titanium alloy is an important aspect. In addition, this paper also made an experimental analysis on the effects of cutting speed, feed rate and tool rake angle on the deformation of titanium alloy during turning.