套筒夹具设计

ABSTRCT

This design content has involved the machine manufacture craft and the engine bed jig design, the metal-cutting machine tool, the common difference coordination and the survey and so on the various knowledge.

The reduction gear box body components technological process and its the processing ￠ 140 hole jig design is includes the components processing the technological design, the working procedure design as well as the unit clamp design three parts. Must first carry on the analysis in the technological design to the components, understood the components the craft redesigns the semi finished materials the structure, and chooses the good components the processing datum, designs the components the craft route; After that is carrying on the size computation to a components each labor step of working procedure, the key is decides each working procedure the craft equipment and the cutting specifications; Then carries on the unit clamp the design, the choice designs the jig each composition part, like locates the part, clamps the part, guides the part, to clamp concrete and the engine bed connection part as well as other parts; Position error which calculates the jig locates when produces, analyzes the jig structure the rationality and the deficiency, and will design in later pays attention to the improvement.

Keywords: The craft, the working procedure, the cutting specifications, clamp, the localization, the error

目 录

序言…………………………………………………………………1

一. 零件分析 ……………………………………………………2

1.1 零件作用 ………………………………………………2 1.2零件的工艺分析 …………………………………………3

二. 工艺规程设计…………………………………………………4

2.1确定毛坯的制造形式 ……………………………………4 2.2基面的选择传 ……………………………………………5 2.3制定工艺路线 ……………………………………………8 2.4机械加工余量、工序尺寸及毛坯尺寸的确定 …………11 2.5确定切削用量及基本工时………………………………14

三 夹具设计……………………………………………………16

3.1问题的提出………………………………………………16 3.2夹具设计…………………………………………………17 3.3切削力及夹紧力计算……………………………………18 3.4定位误差分析……………………………………………19 3.5夹紧误差…………………………………………………20 3.6夹具设计及操作简要说明………………………………21

一、 零件的分析

1.1

套筒零件的的作用，待查

零件的作用

1.2

零件的工艺分析

套筒有2组组加工面他们有位置度要求。

这三个加工面的分别为

1，以外圆为基准的加工面，这组加工面包括，轴肩的各个端面和内孔

2：以内圆为基准的加工面，这组加工面包括，外圆，钻孔，铣顶面槽

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二. 工艺规程设计

2.1 确定毛坯的制造形式

零件的材料为HT200，根据生产纲领以及零件在工作过程中所受的载荷情况，选用精密模铸造。

2.2 基面的选择的选择

基面的选择是工艺规程设计中的重要工作之一。基面选择的正确合理，可以使加工质量得到保证，生产率得到提高。否则，加工工艺过程中会问题百出。

粗基准的选择：对套筒这样的零件来说，选择好粗基准是至关重要。以零件的上端的不加工平面作为粗基准。因为套筒式回转体零件，回转体零件通常以不加工的外圆面为定位粗基准。

精基准的选择：我们选择以加工内圆面精基准

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