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摘 要

机械制造业是国民经济赖以发展的基础,是其他经济部门的生产手段。作为关系着国家和民族长远利益的基础性和战略性产业,它的发展水平是衡量一个国家和地区工业化水平与经济总体实力的标志。机械制造业的生产能力和制造水平，主要取决于机械制造装备的先进程度，换言之，通过提高机械装备的零件精度，从而提高了产品质量和生产水平。

本次设计针对CA6140车床手柄座零件（10 000）件大批量生产设计，首先，了解手柄座的工作方式，CA6140车床手柄座位于车床光杆与手柄连接处，通过传递力矩，实现对机床的操作。其次，分析零件工艺结构，制定工艺规程，从该零件的外形看，此零件形状较不规则，而且需要加工的部位多且位置精度要求较高。因此需要加工一面作为精基准，从而为后面的加工提供保障。再次，由于零件形状不规则，从定位方案考虑其稳定性，将采用两销定位方式同时限制3个自由度，再利用支承板,限制其另外3个自由度，从而使零件的定位稳定可靠。零件的最大尺寸为85.5mm，尺寸较小，夹紧行程也较小。所以夹紧方案采用人工操作，螺纹旋紧方式，这样经济也同样达到夹紧目的。最后，确定优化设计方案使设计更经济实用。

本文针对CA6140车床手柄座工作实际情况，借鉴新的工艺标准，重新设计有关参数。优化制造工艺规程，使得零件的精度耐用度得到提升，便于操作人员的控制，从而提高工作效率和使用寿命。

关键词：CA6140车床手柄座；专用夹具；工艺规程；定位；

Abstract

Machinery manufacturing industry is based on which the national economy development, is the production of other sectors of the economy. As the relationship between the interests of the state and national long-term fundamental and strategic industry, it is a measure of a country and the development level of regional industrialization level and overall economic strength. Machinery manufacturing production capacity and manufacturing level, mainly depends on the degree of advanced machinery and equipment, in other words, by improving the machinery and equipment parts, precision and improve the product quality and production level.

The design for CA6140 lathe handle seat (10) 000 parts mass production design, first of all, understanding the handle way of working, the handle seat in lathe CA6140 lathe the polished rod and the handle, through the transmission torque, realize to the operation of the machine tool. Second, the analysis part process structures, making procedure, from the appearance of the parts, the part shape is irregular, and need higher machining precision of parts is much and position requirements. So you need to processing side as a benchmark, which provide guarantee for the machining of the behind. Again, due to the irregular shape parts, from the positioning scheme considering its stability, and will use the two pin positioning way limit three degrees of freedom at the same time, the reuse of bearing plate, limit the other three degrees of freedom, so that the parts of the positioning is stable and reliable. Parts of the largest size is 85.5 mm, size small, clamping stroke is small. So the clamping scheme USES the manual operation, threaded way, economy is also able to do the clamping. Finally, determine the optimal design scheme makes the design more economical and practical.

Based on CA6140 lathe handle work actual situation, draw lessons from the new technology standards, to design the parameters. Optimize manufacturing procedures, improved the accuracy of parts and durable degree, is advantageous for the control of operators and to improve the work efficiency and service life.

Keywords:handle CA6140 lathe； special fixture；process planning；Location；

目 录

绪论.................................................................5 1手柄座的工艺分析及生产类型的确定..............................6

1.1手柄座的用途及作用................................................6 1.2手柄座的技术要求设计...............................................7 1.3审查手柄座的工艺性分析.............................................7 1.3.1孔的加工工艺分析.................................................7 1.3.2面的加工工艺分析.................................................8 1.3.3槽的加工工艺分析.................................................8 1.3.4螺纹孔的加工工艺分析.............................................9 1.4确定手柄座生产类型.................................................9

2确定毛坯、绘制毛坯简图....................................10

2.1确定毛坯用料......................................................10 2.2确定加工余量和毛坯尺寸公差........................................10 2.3绘制毛坯简图......................................................11

3制定手柄座工艺路线..............................................12

3.1定位基准的选择....................................................12 3.1.1 精基准的选.....................................................12 3.1.2粗基准的选择....................................................12 3.2零件表面加工方法的确定............................................12 3.3加工阶段的划分....................................................13 3.3.1粗加工阶段......................................................13 3.3.2半精加工阶段....................................................13 3.3.3精加工阶段......................................................13 3.4工序的集中与分散..................................................14 3.5工艺路线方案的比较................................................14 3.5.1工艺路线方案I...................................................14 3.5.2工艺路线方案II..................................................14 3.5.3工艺方案的比较与分析............................................15

4加工余量、工序尺寸和公差的确定.................................17

4.1工序30：钻—铰—铰?25H7孔的加工余量、工序尺寸和公差的确定..........17

5切削用量、时间定额的计算........................................18

5．1切削用量的计算....................................................18