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1.概述 上、下托盘是本厂通信产品用标准机架的主要结构件,材料为A3冷轧钢板,板厚1.5mm。零件展开后宽415mm;长676.8mm,其中装配塑料导轨的各组孔的孔距要求如图1所示。为了冲裁各组孔,若采用常用的侧刃或挂钉定位的跳步模,则由于步距有积累误差,达不到图纸精度要求。经分析我们采用了齿条定位跳步模,消除了积累误差。经几年来的使用证明,模具操作方便,定距可靠,零件达到了图纸规定精度,为保证产品
1. Overview The upper and lower pallets are the main structural parts of our standard rack for communications products. The material is A3 cold-rolled steel with a plate thickness of 1.5mm. Parts widened 415mm; length 676.8mm, in which the assembly of plastic guide rail hole spacing requirements of each group shown in Figure 1. In order to punch each hole group, if the use of common side blade or peg positioning jump step mode, then due to the accumulation of error step, can not meet the requirements of drawing accuracy. After analysis, we adopted a rack positioning jump step mode, eliminating the accumulation of errors. After several years of use proved that the mold is easy to operate, reliable distance, the parts have reached the accuracy of the provisions of the drawings, to ensure that the product