First, when the main jaw of the chuck has insufficient stroke

Cause (1): During machining, cutting, casting and other operations are required on the workpiece, so too much debris will accumulate inside the chuck, which will affect the main jaws of the chuck and cause insufficient travel;

Solution: Remove the chuck from the machine tool, disassemble it, and finally clean it up;

 

Cause (2): The connecting tube of the chuck is loose;

Solution: readjust the connecting pipe and lock the connecting pipe;

Second, the workpiece held by the chuck is slipping

Cause (1): Insufficient stroke of the main jaw;

Solution: the workpiece can be re-clamped so that the position of the main claw is near the midpoint of the stroke; if not, the operation can be performed according to the previous solution;

 

Cause (2): The clamping force of the chuck is insufficient;

Solution: Check whether the set hydraulic pressure reaches the corresponding standard;

 

Cause (3): The forming diameter of the upper jaw is different from the diameter of the workpiece;

Solution: use the correct molding method to do it again;

 

Cause (4): The cutting force is too large;

Solution: recalculate the cutting force to confirm whether it meets the specifications of the chuck;

 

Cause (5): The lubricating oil of the chuck main jaw slide is insufficient;

Solution: relubricate each part according to the distance of the slideway, and operate the chuck several times without a workpiece;

 

Cause (6): The rotation speed of the chuck is too high;

Solution: reduce the return speed of the chuck to the standard so that the clamping force can be properly exerted;

3. When the chuck suddenly cannot move

Cause (1): A part of the chuck is damaged;

Solution: disassemble the chuck to find the damaged parts and replace with new parts;

 

Cause (2): The sliding part of the chuck is stuck;

Solution: disassemble the chuck, take out the jammed part for repair or replacement;

 

Cause (3): The rotary hydraulic cylinder stopped operating;

Solution: Review the hydraulic system;

Fourth, the accuracy of the chuck is not good

Cause (1): The outer diameter of the chuck is too large;

Solution: Correct the outer diameter or end face of the chuck, and lock the screws;

 

Cause (2): A large amount of dust has accumulated on the teeth of the main or upper jaw, or the fixing screws of the main and upper jaw are not locked;

Solution: Remove the upper jaw, clean the tooth-shaped part, and tighten the fixing screw according to the specified torque when installing the upper jaw;

 

Cause (3): The jaw trimming process of the chuck is not operated properly or is not fully completed;

Solution: Determine whether the jaw trimmer (forming ring) is symmetrical and parallel to the end face of the chuck, check whether the shape of the jaw trimmer (forming ring) is deformed due to excessive clamping force, and also check the The hydraulic pressure and the surface roughness of the jaw trimming part; correct the one-to-one correspondence for the abnormalities that appear.

 

Cause (4): The height of the upper jaw of the chuck is too high and exceeds the standard, causing the upper jaw to deform or the upper jaw's fixing screw to deform because it is too long;

Solution: lower the upper jaw to the standard height (select a standard size)

 

Cause (5): The clamping force of the chuck is too large, which causes the workpiece to be deformed;

Solution: Reduce the clamping force to an appropriate level, so that the chuck can clamp the workpiece without deformation.

 

Cause (6): Insufficient lubrication

Solution: add molybdenum disulfide grease