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滚珠丝杠是我厂试制的新产品电动缸的关键零件,它的特点是:1.长径比大:以DDG 2000M-67为例,丝杆总长为1127.30mm,滚道外径为23.54-0.033mm,长径比为47.88。2.硬度要求高:硬度要求应大于825HV。3.圆跳动小:长径比为47.88的DDG 2000M-67丝杠,它的圆跳动量在氮化后应小于0.40mm,不经磨削,直接装配使用。4.需要高的耐磨性。5.脆性级别为1～2级。为达到上述技术要求,我们于1985年8月开始,采用38CrMoAl经氮化直接装配使用。其工艺流程为:
Ball screw is a trial of our new product electric cylinder key components, its features are: 1. L / D ratio: DDG 2000M-67, for example, the total length of the screw 1127.30mm, raceway outer diameter of 23.54-0.033 mm, aspect ratio of 47.88.2. High hardness requirements: hardness requirements should be greater than 825HV. 3. Round beating small: DDG 2000M-67 screw with an aspect ratio of 47.88, its circular runout should be less than 0.40mm after nitriding, and be directly assembled without grinding. 4. Need high wear resistance. 5. Brittleness level of 1 to 2 levels. In order to achieve the above technical requirements, we started in August 1985, the use of 38CrMoAl nitrogen by direct assembly. The process is: