机械5

摘要 在“一带一路”利好背景下，我们国家产业结构以及机械加工制造业，其结构性变化明显。企业完成工装、夹具的优化以及改良是迫在眉睫。夹具这个传统的行业，在制造业飞速发展的今天，又被赋予了新是使命。因现在产品种类繁多，零件结构万万千千。专用夹具的设计在不可取代的基础上，变的越来越重要。 本次毕设的题目是GJZG3-23工具座盖零件的加工工艺分析及镗削Φ72孔夹具设计。本工件和工具底座配合使用的，连接和紧固连接件。该零件外形复杂，需要对其进行铸造，铸造后的零件要能够承受一定的载荷。 零件加工工艺的分析不仅完成了工件结构分析、基准选择、制造和加工方式选择，还根据加工工序卡完成了相应是切削数据的计算。本次专用夹具设计是为镗削Φ72孔进行的。根据要求需要2工件装夹在一起合镗削Φ72孔，完成了定位夹紧方案以及装置的设计，还对夹具上其他零部件进行了设计和确定，完成设计图纸量的要求等。 关键词：GJZG3-23工具座盖；工艺分析；镗削Φ72孔；专用夹具 Abstract U
nder the"O
ne Belt, O
ne Road" good policy, our cou
ntry's i
ndustrial structure a
nd mecha
nical processi
ng ma
nufacturi
ng i
ndustry have obvious structural cha
nges. It is extremely urge
nt for e
nterprises to complete the optimizatio
n a
nd improveme
nt of tooli
ng a
nd fixtures. The traditio
nal i
ndustry of fixtures has bee
n give
n a
new missio
n i
n today's rapid developme
nt of ma
nufacturi
ng. Because of thewidevariety of products, the structure of parts is thousa
nds of thousa
nd. The desig
n of special fixtures is becomi
ng more a
nd more importa
nt o
n a
n irreplaceable basis. The subject of this time is the processi
ng tech
nology a
nalysis of the GJZG3-23 tool cover part a
nd theΦ72 hole fixture desig
n. Theworkpiece a
nd tool base are used together to co
n
nect a
nd faste
n the co
n
nector. The part has a complex shape a
nd
needs to be cast. The cast part must be able towithsta
nd a certai
n load. The a
nalysis of the part processi
ng tech
nology
not o
nly completes theworkpiece structure a
nalysis, be
nchmark selectio
n, ma
nufacturi
ng a
nd processi
ng mode selectio
n, but also completes the calculatio
n of the cutti
ng data accordi
ng to the machi
ni
ng process card. This special fixture desig
n is for bori
ngΦ72 holes. Accordi
ng to the requireme
nts, 2workpieces are clamped together a
ndΦ72 holes are cut. The positio
ni
ng a
nd clampi
ng scheme a
nd the desig
n of the device are completed. The other compo
ne
nts o
n the fixture are also desig
ned a
nd determi
ned, a
nd the requireme
nts of the desig
n drawi
ngs are completed. Keywords: GJZG3-23 tool cover; process a
nalysis; bori
ngΦ72 hole; special fixture 目录 摘要I Abstract II 第一章零件的分析1 1.1零件的作用1 1.2零件的组成表面分析1 1.3零件的加工要求分析2 第二章确定零件材料、制造方式及生产类型3 2.1零件材料的确定3 2.2零件制造方式的确定3 2.3零件生产类型的确定5 第三章设计加工工艺规程6 3.1零件加工基准的确定6 3.2零件加工工艺路线的设计6 3.3零件加工工艺装备的选择7 3.4零件加工余量确定8 3.5确定切削用量、计算加工工时9 第四章设计镗Ф72孔专用夹具23 4.1设计定位方案23 4.2确定定位元件23 4.3设计夹紧方案24 4.4确定夹紧元件24 4.5设计夹具体24 4.6选择镗套25 4.7计算镗削力25 4.8计算夹紧力26 4.9分析定位误差27 结论28 致谢29 参考文献30