齿轮锻坯整形机传动装置的设计 大学论文.doc

毕业论文（设计） 齿轮锻坯整形机传动装置的设计 　2014年3月30日摘 要 起动齿轮毛坯经心轴锻造锻成圆环后，其圆环的厚度因锻锤的锻击不均匀，会出现凹凸不平，常常造成某些部位厚度尺寸误差较大，为此必须进行圆环的圆整。我们用滚轮挤压的方法来代替传统上的车削加工，滚轮挤压的方法不仅可以把做无用功的摩擦力作为动力，不用进行多次车削加工，既节省原材料又节省工时，而且加工后的表面质量也较为光整，改善了材料的致密性，提高了材料的机械性能。利用滚轮挤压的方法是完全可行的。 工件表面凹凸不平，利用有效摩擦力的原理来进行挤压，必须保证当毛坯尺寸较小部位夹在两滚轮之间时与滚轮之间有适当的接触压力，使锻坯能随滚轮一起转动；同时为了方便工件裝夹，在喂入方式上采用浅螺纹旋进旋出，滚轮成锥度设计，减速器能实现正反转要求，是本次设计中要解决的主要问题。 关键词：滚轮；挤压；有效摩擦力 ABSTRAT The starter toothed wheel semi finished materials hammer the ring after spindle forging, its ring thickness because the forging hammer hammers strikes the non-uniformity, can appear unevenly, frequently creates certain spot thickness size errors to be bigger, must carry on the ring for this the circle to put in order. We use the hoop extrusion the method to replace in traditional the turning processing, the hoop extrusion method not only may do the useless merit the friction force to take the power, does not need to carry on many times the turning processing, both saves the raw material and to save the man-hour, moreover processes after the surface quality also light entire, improved the material compactness, enhanced the material machine capability. Therefore the use hoop extrusion method is completely feasible. because of the work piece surface appearing uneven, but also using effective friction force principle carries on the extrusion, therefore must guarantee when a semi finished materials size smaller spot clamps when two hoops has the suitable contact pressure with the hoop between, causes the semi finished product to be able to rotate together along with the hoop; Simultaneously for the convenience work piece clamping, the way of feeding into use the shallow thread precession to turn on lathe, the hoop becomes taper design, the reduction gear can realize the reversing request, are the main question which in this design must solve. Key words: Hoop; Extrusion; Effective friction force 目 录 目 录 III 1 绪论 1 1.1选题背景 1 1.2国内外研究现状 1 1.3方案论证 2 2传动方案及电动机的选择 4 2.1