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摘 要
本設(shè)計(jì)是CA6140撥叉的加工工藝規(guī)程及某道工序的專用夾具設(shè)計(jì)。CA6140撥叉的主要加工表面是三面兩孔。一般來說，平面的加工精度要比孔的加工精度更容易保證。因此，本設(shè)計(jì)遵循先面后孔的原則，并將孔與平面的加工明確劃分成粗加工和精加工階段以保證孔的加工精度。先將第一個(gè)待加工表面零件的左端面加工出來，再以底面為粗基準(zhǔn)加工零件頂面，并以零件的頂面作為精基準(zhǔn)以完成以后的孔的加工。所以選擇以零件左端面作為粗基準(zhǔn)，以的孔作為精基準(zhǔn)，整個(gè)加工過程選用組合機(jī)床，在夾具方面選用專用夾具。考慮到本零件結(jié)構(gòu)的特殊性，以及所需的夾緊力較小等原因，本零件的夾緊方式采用螺旋夾緊機(jī)構(gòu)。
關(guān)鍵詞：夾具，加工工藝，工藝規(guī)程，定位
CA6140 lathe processing technology fork and Fixture Design Abstract
CA6140 fork of the design is a point of order processing technology and procedures in a dedicated fixture design. CA6140 fork of the main surface is two holes on three sides. Generally speaking, the plane of the machining accuracy of the machining accuracy than the hole more easily guarantee. Therefore, the first surface of the design followed the principles of post-holes, and holes with the two-dimensional processing clearly divided into roughing and finishing stages of processing to ensure the accuracy of the hole. First processing the surface of the first parts to be left out of face processing, and then to the bottom parts for rough machining the top face of the base and top parts as to complete the baseline precision of the hole after the processing.And therefore he chose to spare parts as a left-side rough, with a precision of the hole as a benchmark,the whole combination of machine tool selection process, in selected aspects of exclusive jig fixture. Taking into account the specificity of the structure of the parts, as well as a smaller clamping force required for other reasons, the parts of the clamping means clamping screw body to adopt.
Keywords: Fixture ,Components processing ,technology Process, Positioning
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