The use of the three-jaw chuck will result in the same […]
The use of the three-jaw chuck will result in the same reduction of the shaft and the flare phenomenon, which directly affects the machining accuracy and the reliability of the clamping. Practice has proved that using the following methods to correct, simple and practical, the effect
Significant, let's try it.
Taking this positive claw chuck as an example, first clamp a round rod of appropriate diameter with an external clamp, start the machine tool, and turn the outer circle portion of the claw. Then use the inner support to hold a ring and open
Dynamic machine tool, turning the inner and inner ends of the claws. Obviously, this can significantly improve the same axis of the internal circle of the claw after machining and the spindle of the machine tool and eliminate the phenomenon of the bell mouth, which is relatively high.
The accuracy of the correction is achieved.
Specific application fashion should pay attention to the following points:
The outer circle of the round bar and the inner circle of the ring are processed in advance and have a certain precision. Moreover, the inner diameter of the torus should not be too small, so that the concave surface of the claw surface is deep and deep, and the workpiece of large diameter is clamped.
It is easy to damage the surface of the workpiece and needs to be taken seriously.
Because there is inevitably a gap between the claw and the chute of the chuck body, the direction of the force of the claw during the correction is exactly opposite to the direction of the force during the actual working, so the card after the correction
Not only will the bell mouth appear when the disc is used. Therefore, when correcting, the inner circle of the claw should be pre-machined into a counter-cone with a certain taper (large and small inside), and the adjusted taper value can pass the test.
It is determined that this is the key to success.
Due to the high hardness of the jaws, it is also interrupted cutting. Therefore, the cutting depth and the amount of cutting are small, and the cutting speed is not very high. The tool material is best made of cemented carbide. If it can be dragged
A small power head is mounted on the board, and the grinding wheel correction is also effective.
The first step is to cut the external circle of the jaws in order to establish a good benchmark to improve the correction accuracy. This step is best not to save. The method can also be used to correct the error caused by improper installation or other reasons for the new three-claw, thereby improving the machining accuracy.
The same principle can be used for the correction of the reverse claw.