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

Shown as the figure below, corner radius is formed by crossed line major cutting edge and side cutting edge, which is also named as edge radius.

Corner Radius


In the cutting process, in order to improve the tool tip strength and reduce the surface roughness of the machine, a circular arc transition edge usually exists at the tool nose. Besides, general non-reground blade has an arc as transition with certain radius. Even though as to exclusively sharpened turning tip, It still own a certain arched chamfer. There is no absolute corner on any turning tip.

comparison of nother corner Radius
comparison of nother corner Radius

Through the comparison in Figure 1, it can be seen that the radius of the tool nose radius and the feed per rotation have the greatest impact on surface roughness of workpiece.To achieve the theoretical surface roughness requirements,the correct tool nose radius and feed rate must be selected. The figure below is a reference table of the relationship between values of these three elements. Generally, the corner radius of the tool tip is suitable for three to four times the feed rate.

fRa
r0.40.81.21.62.0
1.60.070.10.120.140.16
3.20.10.140.180.20.23
6.30.140.20.250.280.32
12.50.20.280.350.40.45
250.280.40.490.560.63

r   corner radius  mm

f   max feed per Rot.  Mm

Ra  Roughness     μm

For the selection of the radius of the tool nose radius and the feed per rotation, it can also be determined by the theoretical empirical formula (1).

Ra=f2/r*125

Wherein:

Ra (μm) – surface roughness;

f(mm/rev) – feed per revolution;

r (mm) – the radius of the tool tip arc;

125 — constant.

Substituting the set value of the radius of the tool nose radius and the feed amount(1), we can calculate up the theoretical surface roughness and surface roughness as well.

E.g.: The radius of the tool nose arc is 0.8 mm, and the feed rate is

0.2 mm/r, substituting formula (1) for theoretical surface roughness.

Ra=0.22/0.8*125=6.25μm

The theoretical surface roughness is: 6.25 μm

comparison of nother corner Radius

It is worth noting that if the radius is too large, vibration will occur due to excessive contact between the tool and the workpiece. Conversely, if the radius is too small, the tip will become weak and wear out quickly. Need to re-sharp often.Therefore, the fillet radius is generally 0.3~0.4mm.

Conner radius(edge radius) compensation

When machining CNC lathes, it is necessary to compensate for the corner radius.

When programming, the tool tip is usually considered as a point, but in practice there is a rounded corner. When the surface, such as the end face, the outer diameter, the inner diameter, and the like, which is parallel or perpendicular to the axis, is processed by a program programmed according to the theoretical tip point, no error occurs.

However, in the actual processing, there will be overcutting and multi-cutting. We will discuss the following two situations:

cutting plane where corner radius exist
  1. Turning end face and inner and outer cylindrical faces

 The figure below shows the tip of a circular arc and its orientation. The tool nose point used for programming and tool setting is the ideal tool tip point. Due to the presence of the tool nose arc, the actual cutting point is the tangent point of the tool edge arc and the cutting surface. When turning the end face, the actual cutting point of the tool nose arc is the same as the Z coordinate of the ideal tool tip point; when the outer and inner holes of the car are used, the X coordinate value of the actual cutting point and the ideal tool tip point are the same. Therefore, it is not necessary to perform the tool nose radius compensation when turning the end face and the inner and outer cylindrical faces.

cutting plane where corner radius exist


2) Turning the taper surface and the arc surface when machining taper surface and arc surface

 When the machining path is not parallel to the machine axis, there is a positional deviation between the actual cutting point and the ideal tool tip point in the X and Z coordinate directions. The influence of the tool nose radius on the machining accuracy is shown in the figure below. If programmed with an ideal tool tip point, there will be less cut or overcutting, resulting in machining errors. The larger the radius of the tool nose arc, the greater the machining error.

more or less cutting of corner radius


In the actual machining of the turning tool, due to the process or other requirements, the tool tip is often not an ideal point, but a circular arc. When machining cylindrical and end face contours parallel to the coordinate axis, the tool nose arc does not affect its size and shape, but when machining non-coordinate direction contours such as cones and arcs, the tool cutting point is at the tool edge arc. If it changes upwards, the arc of the tool tip will cause dimensional and shape errors, resulting in less or more cuts. This kind of machining error caused by the tooltip is not an ideal point but a circular arc, which can be eliminated by the tool nose radius compensation function.

Lascia un commento

Il tuo indirizzo email non sarà pubblicato. I campi obbligatori sono contrassegnati *

久久国产精品二卡| 午夜性福福利视频一区二区三区| 干女人逼逼的大几把| 国产免费无码一区二区视频无码| 日韩久久奶茶视频| 欧美一区二区三区四公司| 男人吃奶大鸡巴操逼视频| 中文字幕一区二区三区中文字幕| 国产无圣光一区福利二区| 国产精品久久久69粉嫩| 亚洲精品成人无码app| 快日我啊好爽日我逼| 欧美国产日韩a欧美在线| 白虎嫩穴抠逼高潮| 老司机精品免费在线视频| 一色道久久88加勒比一| 亚洲一区二区三区日本在线| 亚洲av伦理一区二区三区久久| 日本高清一区二区三区不卡| 国产精品久久久69粉嫩| 精品国产自在久国产应用| 黄色软件大屌怒戳粉嫩小穴| 我和两个老师的浮乱生活| 我和两个老师的浮乱生活| 女人逼逼出水视频| 尤物AV无码国产在线看| 亚洲av伦理一区二区三区久久| 久久久久久久 亚洲精品| 午夜无码a级毛片| 麻豆视频一级片在线观看| 天堂丝袜人妻中文字幕在线| 黄色软件大屌怒戳粉嫩小穴| 大鸡巴操小逼的视频| 欧美综合区自拍亚洲综合| 最新国产亚洲亚洲精品A| 精品一区二区三区女性色| 91性潮久久久久久久久| 国产亂倫近親相姦| 成人av大全免费一区二区三区| 久久久久人妻一区精品加勒比| 把韩国美女操出水|