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看了1993年第2期《机械制造》上“大型塑料注射机的故障排除数例”后,我认为大模上螺孔螺纹损坏一节所述之事与我厂JA31-160B压力机三工件上模板的螺孔发生的情况极为相似。为此、希望把我们的改进上模板的做法介绍给大家,供参考。我们对上海锻机厂生产的JA31-160B压力机设计了三工位的锻模,通过20年的使用,上模板上的M22的内螺纹经常滑丝,我们也作过改制螺纹的修理,但是总觉得很不方便,又要购买或自制螺距相同大规格丝锥,还严重地影响了生产,为此我们对上模板作了改进性修理(附图)。就是在M22的原位置镗个梯形孔,
Watched the second issue of 1993, “Machinery” on the “large-scale plastic injection machine troubleshooting number,” I think the screw thread on the big mold damage section described in my factory JA31-160B presses three pieces of workpieces The screw holes on the template are very similar. To this end, I hope we can improve the template approach introduced to you for reference. We designed a three-position forging die for the JA31-160B press produced by Shanghai Forging Machine Factory. After 20 years of use, the internal thread of the M22 on the upper die often slides, and we also repair the reformed thread. However, Always feel very inconvenient, but also to buy or make the same pitch with a large size tap, but also a serious impact on the production, for which we have made an improved template on the repair (with photos). M22 is the original location Boring a trapezoidal hole,