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How to do cnc eccentric turning?

In mechanical transmission. The reverse motion becomes a reciprocating linear motion or a linear motion. Becomes a reverse motion. It is usually done with a painful shaft or a crankshaft. The pain axis, that is, the axis between the outer circle. And the outer circle of the workpiece, is parallel and not coincident. The painful sleeve is the outer circle of the workpiece. And the axis of the inner rod L is parallel and does not coincide.


 The spacing between these two axes is called the "pivot distance." For the method of turning the painful workpiece. Different clamping methods should be adopted . According to the different quantity, shape and precision requirements of the workpiece. But, it should be ensured that the axis of the painful part. To process coincides with the axis of rotation of the lathe spindle. There are several common clamping methods for turning and hurting parts.


(1) Turning the painful workpiece with a four-jaw single-action chuck


This method is suitable for adding T to the pain level and the accuracy is not high. And the short length and a small number of painful workpieces.


(2) Turning the painful workpiece with a three-jaw self-centering chuck


This method is suitable for large quantities and short lengths. And the painful workpiece with small pain and low precision requirements. When clamping the workpiece. add a spacer to one of the three-claw self-centering chucks.


(3) Turning the painful workpiece with a double chuck


This method is suitable for a painful workpiece with a short processing length. A small pain distance, and a large number. Before processing, the pain distance should be adjusted first. The pipe threading lathe is first clamped to the three-jaw self-centering. Chuck with a machined mandrel. Well correction. 


The pipe thread lathe then adjusts the four-jaw single-action chuck. Offset the center of the mandrel to the offset of one workpiece. The pipe thread lathe can be used to machine the workpiece by removing the mandrel. The advantage of this method of pipe thread lathe. Is that only one offset is required to be corrected in a batch of workpieces. The drawback is that the two chucks are stacked together and are less rigid.


(4) Turning the painful workpiece with a faceplate


This method is suitable for processing workpieces with short lengths. Large pain points and low precision requirements.


Before processing the painful hole.  The outer area and both sides of the workpiece are processed to the desired position. Draw the position of the painful hole on the end face. And then use the pressure plate to clamp the workpiece onto the faceplate. It can be turned by pressing it with the 捌 dial and then pressing it.


(5) Turning the painful workpiece with the painful chuck


This method is suitable for processing finer partial L-I parts of short shafts. Discs and sleeves. The advantage of the pipe thread lathe is that the clamping is convenient. And the processing quality can be guaranteed. And can get higher precision and versatility.


(6) Turning the painful workpiece with two tops


This method is suitable for processing long, painful workpieces. Before processing, the center hole of the center point. And the center hole of the point of pain should be drawn at both ends of the workpiece. Pipe threaded lathe and machined the center hole. Then use the front and rear tops to hold the car for turning.


If the painful distance of the painful axis is small. It may be dry with the main center when drilling the center hole. Now, the process table can be increased by lengthening the length of the workpiece. To the depth of the two center holes. When the pipe thread lathe is processed, the blank can be first turned into an optical axis. Then the car goes to the center hole of both ends to the length of the workpiece, and then draws the center hole line. Drilling the center hole of the pain, the car is hurting the axis.


(7) Turning the painful workpiece with a special fixture


This method is suitable for high processing accuracy requirements. And a large batch of painful workpieces.


Before processing, the corresponding pain axis or partial pain sleeve should be processed. According to the pain distance on the workpiece. The workpiece is then turned on the deflector or the painful axis.


Relative article: what is cnc turning center


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