压缩机箱体加工工艺及夹具设计

机械论文编号:JX212 所有图纸,任务书,论文字数:14474.页数:37

目   录
中文摘要 ........................................................Ⅰ
英文摘要 ........................................................Ⅱ
前言 ............................................................1
第1章  零件的分析 ...............................................1
  1.1  零件的作用 ...............................................1
  1.2  零件的工艺分析........................................... 1
第2章  工艺规程的设计 ...........................................2
2.1  确定毛坯的制造形式......................................... 2
2.2  基准的选择................................................. 2
2.2.1 粗基准的选择.............................................. 2
2.2.1 精基准的选择.............................................. 2
2.3  制定工艺路线 ...............................................3
2.3.1 机械加工余量、工序尺寸及毛坯的确定........................ 3
2.3.2 确定切削用量及基本工时.................................... 5
第3章  专用夹具的设计........................................... 16
3.1  问题的指出................................................. 16
3.2  夹具的设计 .................................................17
3.2.1 定位基准的选择 ............................................17
3.2.2切削力及夹紧力的计算....................................... 17
3.2.3定位误差的分析 .............................................17
3.2.4夹具安装及操作的简要说明 ...................................21
第4章  结论 .....................................................22
参考文献........................................................ 23
致谢.............................................................24

摘   要

     零件的加工工艺编制，在机械加工中占有非常重要的地位，零件工艺编制得合不合理，这直接关系到零件最终能否达到质量要求；夹具的设计也是不可缺少的一部分，它关系到能否提高其加工效率的问题。因此这两者在机械加工行业中是至关重要的环节。
本次设计的是压缩机箱体加工工艺以及夹具的设计，压缩机主要作用是把低压冷媒汽体吸进压缩成高压汽体----冷却循环，使部分动能转化为压力能从而提高汽体的压力。压缩机箱体则是承载这个压力和连接各零部件，因此要求箱体能够承受压力，以及箱体与其他零部件的密封性，在编制加工工艺时，要考虑到各个接触面的各项精度以及形状与位置公差等。
在设计加工箱体斜面上的螺纹孔专用夹具时，由于孔是自由公差，所以为了缩短加工时间，采用两个斜面挡块来使箱体工件定位，再使用两铰链支座，使得装夹工件就方便了，斜面挡块的与水平位置倾斜14°，保证了被加工斜面在水平位置，使用钻模以及钻模套来准确的定孔的加工位置，有钻模套加工孔无需画线定位，直接就可以加工，提高了加工效率。

关键词：工艺、基准、切削用量、定位基准、定位误差。

ABSTRACT

The part treating handicraft establishment, occupies very important position in machine work , part handicraft weaves such that this is related to ultimate being able to reach a quality requirement or not of part whether rationally or not, directly; The clamp design is also an essential part , the problem whether can improve whose treating efficiency it is related to. This both are all-important links therefore in machine work industry.
Designing that originally time is that the compression engine box experiences and observes the design processing handicraft and the clamp , the main effect of compression engine is that the cryogen vapor body inhales the high-handed vapor compressing Cheng in experiences and observes- - - - the circulation cooling down , makes part kinetic energy change the pressure being that pressure can improve the vapor body thereby with low pressure. Then, the compression engine box body is to bear the weight of this pressure and links every component and part, Require that the box body is able to bear pressure therefore, and box body comparing with other component and part hermetic sealing, before work out when processing handicraft , ask accuracy and form and location common difference etc. to consider various arriving at each contact surfaces.
During the period of the clamp designing the special use processing the upper box body inclined plane screwed hole, adopt two inclined planes to make box body workpiece fix position coming the stop dog , use two hinge abutments again , can be used pretending to grip workpiece having gone to the lavatory since the hole is that the free common difference , reason why process time for curtailing,the inclined plane blocks a piece and horizontal position tilts 14', Have ensured that the inclined plane being processed is in horizontal position , have used drill model to process location as well as drill model cover comes to accurate fixing, have drill model the allocation processing a hole set drawing a line unnecessarily, is direct not bad the efficiency having processed , improving treating.

Keywords: Handicraft , criterion, cut dosages , the criterion fixing position , the error fixing position. .