Correction method of three-jaw manual chuck

When used for a long time, the three-jaw manual chuck will suffer from reduced coaxiality and bell mouth phenomenon, which directly affects the machining accuracy and clamping reliability. Practice has proved that using the following method to correct it is simple and practical, and the effect is obvious. You might as well give it a try.

Taking the positive jaw chuck as an example, first use an external clamp to clamp a round bar of appropriate diameter, start the machine tool, and turn the outer circular part of the jaw. Then use an inner support to clamp a ring piece, start the machine tool, and turn the inner circular part and end face of the claw. Obviously, this can significantly improve the coaxiality between the machined inner circle of the claw and the machine tool spindle, eliminate the bell mouth phenomenon, obtain higher accuracy, and achieve the purpose of correction. Specific application fashion should pay attention to the following points.

The outer circle of the round rod and the inner circle of the ring must be processed in advance and have a certain degree of accuracy. And the inner diameter of the ring body should not be too small, otherwise the concave arc of the claw surface will be too deep, and the surface of the workpiece will be easily damaged when clamping large-diameter workpieces, so attention must be paid.

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Disassembly and cleaning of hollow hydraulic chuck

Steps to disassemble the hollow hydraulic chuck. For safety reasons, slings and rings must be used when removing the chuck.

1. Loosen the locking screw and take out the upper claw and T-nut.

2. Take out the dust cover.

3. Use a socket wrench to separate the tie rod nut from the tie rod.

4. Loosen the clamp fixing screw and remove the clamp.

5. Remove the pull plate from behind the chuck.

6. Push the base claw toward the center of the body and take it out from the rear end of the body.

7. Take out the rear fixed cover from the pull plate and take out the tie rod nut at the same time.

After disassembly, thoroughly clean and dry all parts with diesel, remove debris, debris, etc. from the body. In addition, the pull plate and base claws are also thoroughly cleaned, and then applied with lubricating grease. At this time, high-quality lubricating oil must be used. If the lubricating oil used is poor, the clamping force will be halved or stuck.

When assembling, follow the above disassembly procedure in reverse, but be sure to ensure that there are no errors in the number and position of the parts.

When pulling the plate back to assemble the claw shell, you should pay attention to the number 1 marked on the end face and align it with the chute of No. 1 claw of the claw shell. Only in this way can the assembly be correct.

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