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针对凹槽类零件感应淬火梯度硬度不合理、精度保持性差的问题,对GCr15钢滚珠丝杠滚道凹槽产生的漏磁、磁力线散逸现象进行了理论计算分析,阐述了漏磁对滚道凹槽淬硬层深的影响,提出了在丝杠凹槽处涂覆铁氧体,减少漏磁与散磁的感应淬火方法,并进行了对比淬火试验。结果表明:采用漏磁控制淬火方法,丝杠滚道硬度到达900~1000 HV0.1,等硬层深度达到3~5 mm,提高了丝杠使用寿命和精度保持性。
Aiming at the unreasonable induction hardening hardness of the grooved parts and poor accuracy retention, the theoretical calculation and analysis of the leakage of magnetic flux and magnetic flux generated by the ball groove of the GCr15 steel ball rolling groove are described. The effect of deep hardened layer is put forward. The method of inductive quenching, which is to apply ferrite in the groove of the lead screw to reduce the leakage and the magnetic flux leakage, is put forward and the comparative quenching test is carried out. The results show that with the method of flux leakage control quenching, the hardness of the ball screw reaches 900 ~ 1000 HV0.1 and the hardness of the hard layer reaches 3 ~ 5 mm, which improves the service life and accuracy of lead screw.