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我厂加工SSS_3型电力机车牵引电机刷盒方孔,原采用25和32双面齿推刀,在立式液压推床上分别进行推削。加工后,方孔精度、垂直度、平行度较差,返修率10.5％。一付刀具(每付2种规格,每种规格3把。)一般情况下只能加工200个刷盒,刀具耐用度低,工具费用消耗大。据此,我们改进刀具设计,并应用了涂层技术,经使用验证,不但保证了产品质量,而且刀具耐用度提高6倍多。一、问题分析产品如图1所示。材质ZHSi80—3,硬度HB90～100。加工25_(0.05)~(0.10)×32_(0.05)~(0.15)方孔原工艺是
I plant processing SSS_3 electric locomotive traction motor brush box square hole, the original use of 25 and 32 double-sided tooth push knife, were pushed in the vertical hydraulic push bed. After processing, square hole accuracy, verticality, poor parallelism, rework rate of 10.5%. A pair of knives (2 kinds of specifications for each pay, 3 for each specification.) Under normal circumstances can only process 200 brush box, tool durability is low, the tool costly. Accordingly, we improve the tool design, and the application of coating technology, the use of proven, not only to ensure product quality, and tool durability increased by 6 times. First, the problem analysis product shown in Figure 1. Material ZHSi80-3, hardness HB90 ~ 100. Processing 25_ (0.05) ~ (0.10) × 32_ (0.05) ~ (0.15) square hole original process is