欧美人妻精品一区二区三区99,中文字幕日韩精品内射,精品国产综合成人亚洲区,久久香蕉国产线熟妇人妻

3 Steps to Understanding and Choosing Various Angles of Cutting Tools 2

切削金屬時(shí),刀具切入工件,刀具角度是用來確定刀具切削部分幾何形狀的重要參數(shù)。為了直觀地理解車床刀具角度,我們從單點(diǎn)刀具角度開始,如下所示:

3 Steps to Understanding and Choosing Various Angles of Cutting Tools 3
  1. The composition of cutting part: 1 corner, 2 edges, and 3 faces

The cutting part of a tool is face、major flank plane,minor flank plane,side cutting edge、end cutting edge and corner.

3 Steps to Understanding and Choosing Various Angles of Cutting Tools 4

1)face  The surface on which the chips flow on the tool.

2)major flank plane  The surface of the tool that opposes and interacts with the machined surface on the workpiece, called the major flank plane.

3)minor flank plane  The surface of the tool that opposes and interacts with the machined surface on the workpiece, called the minor flank plane.

4)side cutting edge  The intersection of the face of the tool and the major flank plane is called the side cutting edge.

5)end cutting edge  The intersection of the face of the tool and the minor flank plane is called the end cutting edge.

6)corner  The intersection of the side cutting edge and the end cutting edge is called corner. The corner is actually a small curve or straight line, called rounded corner and chamfered corner.

2. Auxiliary plane for measuring the cutting angle of the turning tool

In order to determine and measure the geometry of the turning tool, three auxiliary planes are selected as the reference. The three auxiliary planes are the cutting edge plane, the reference plane (Base) and the orthogonal plane.

1)cutting edge plane——Cut at a selected point of the side cutting edge and perpendicular to the plane of the bottom plane of the toolholder.

3 Steps to Understanding and Choosing Various Angles of Cutting Tools 5
  • reference plane(Base)——Pass a selected point of the side cutting edge and parallel to the plane of the bottom of the toolholder.
3 Steps to Understanding and Choosing Various Angles of Cutting Tools 6
3 Steps to Understanding and Choosing Various Angles of Cutting Tools 7


It can be seen that the three coordinate planes are perpendicular to each other to form a spatial rectangular coordinate system.

3.the main geometric angle and choice of turning tools

1) principle of selecting rake angle(γ0 )

The size of the rake angle mainly solves the contradiction between the firmness and sharpness of the cutter head. Therefore, the rake angle should first be selected according to the hardness of the processed material. The hardness of the processed material is high, and the rake angle takes a small value, and vice versa. Secondly, the size of the rake angle should be considered according to the processing property. The rake angle should be taken as a small value during roughing, and the rake angle should be taken as a large value during finishing. The rake angle is generally selected between -5° and 25°.

3 Steps to Understanding and Choosing Various Angles of Cutting Tools 8


Usually, the rake angle (γ0) is not pre-made when the turning tool is made, but the rake angle is obtained by sharpening the chip flute on the turning tool. The flute is also called the chipbreaker. Its function is:

a.Breaking the chips without entanglement.

b.Control the outflow direction of the chips to maintain the accuracy of the machined surface.

c.Reduce cutting resistance and extend tool life.

3 Steps to Understanding and Choosing Various Angles of Cutting Tools 9

2)Principle of selecting clearance angle (α0 )

First of all, the nature of processing needs to be considered. When finishing, the clearance angle takes a large value, and when roughing, the clearance angle takes a small value. Secondly, considering the hardness of the processed material, the hardness of the processed material is high, and the main clearance angle is taken to a small value to enhance the firmness of the cutter head.otherwise, the clearance angle should take a small value. The clearance angle cannot be zero or negative, and is generally selected between 6° and 12°.

3 Steps to Understanding and Choosing Various Angles of Cutting Tools 10
  • principle of selecting cutting edge angle(Kr )

First of all, the rigidity of the turning process system consisting of lathes, clamps and tools needs to be considered. If the system is rigid, the cutting edge angle should be small, which is beneficial to improve the service life of the turning tool, improve the heat dissipation conditions and surface roughness. Secondly, the geometry of the machined workpiece should be considered. When machining the step, the cutting edge angle should be 90°. The workpiece cut in the middle is cut, and the cutting edge angle is generally 60 °. The cutting edge angle is generally between 30° and 90°, and the most common is 45°, 75°, and 90°.

3 Steps to Understanding and Choosing Various Angles of Cutting Tools 11
  • The principle of selecting minor cutting edge angle(Kr’ )

Firstly, the turning tool, the workpiece and the clamp have sufficient rigidity to be considered, so as to reduce the minor cutting edge angle.otherwise, the large value should be taken.secondly, considering the processing property, the minor cutting edge angle can be taken as 10° during finishing. 15°, when roughing, the minor cutting edge angle can be about 5°.

3 Steps to Understanding and Choosing Various Angles of Cutting Tools 12
  • The principle of selecting cutting edge inclination(λS)

Mainly depends on the nature of processing. When roughing, the workpiece has a large impact on the turning tool, taking λS ≤ 0°. When finishing, the workpiece has a small impact force on the turning tool, taking λS ≥ 0°.usually λS =0°. The cutting edge inclination is generally selected between -10° and 5°.

3 Steps to Understanding and Choosing Various Angles of Cutting Tools 13

發(fā)表評論

電子郵件地址不會(huì)被公開。 必填項(xiàng)已用*標(biāo)注

涩涩屋操美女视频| 澳门一区二区免费下线观看| 日本a国产精品久久久久| 一区二区三区中文欧美| 老湿机69福免费破解版| 丁香社区五月在线视频久| 国产亚洲欧美中文日韩| 我要操日本女人的逼| 精品人妻一区二区三区日产乱码| 亚洲午夜福利视频在线| 日本公共厕所mmm撒尿| 神马我不卡手机在线观看| 精彩欧美一区二区三区| 大鸡巴抽插小骚逼视频免费| 色偷偷影音先锋男人av| av中文字幕一区二区精品久久| 亚洲国产精品伦理在线看| 啦啦啦视频在线手机播放| 国产精品一区二区三区色噜噜| 女女同性女同1区二区三| 高清无码精品一区二区三区| 天天天天天干夜夜夜夜夜操| 淫荡淫水逼操烂视频| 日本高清一区二区三区水蜜桃| 日本男人捅女人机机| 亚洲高清中文字幕一区二区三区| 无码中文字幕免费一区二区三区| 被春药女高潮抽搐喷水视频| 最新免费高清无码片| 亚洲天堂成年人在线视频| 久久99热精品在线观看| 波多野吉衣一区在线观看| 日韩av一区二区三区激情在线| 青娱乐欧美性爱视频| 国产成人精品免费视频全| 国产无圣光一区福利二区| 91大神精品动漫| 彩虹网免费视频在线观看| av黄色资源在线观看| av黄色资源在线观看| 狠狠色伊人亚洲综合成人|