What is a Lathe Chuck?
A chuck is a mechanical device used to clamp a workpiece on a machine tool. The machine tool attachment that clamps and positions the workpiece by using the radial movement of the movable jaws evenly distributed on the chuck body. The chuck is generally composed of a chuck body, a movable claw and a claw driving mechanism. The chuck body has a minimum diameter of 65 mm and a maximum diameter of 1500 mm. There is a through hole in the center for passing workpieces or bars. The back has a cylindrical or short tapered structure that is directly or through a flange connected to the end of the machine's spindle . The chuck is usually installed on lathes, cylindrical grinders and internal grinders, and can also be used with various indexing devices for milling and drilling machines.
- "Chuck" is
- The number of chuck claws can be divided into: two-jaw chucks,
- Manual self-centering chucks for chuck machine tools are divided into short cylindrical and short cone chucks according to their connection with the end of the machine tool spindle.
- 1. In order to maintain the lathe chuck for a long time, it still has good accuracy. Lubrication is very important. Improper or improper lubrication will cause some problems, such as abnormal function at low pressure, weakened clamping force, poor clamping accuracy, abnormal wear and seizure, so the chuck must be properly lubricated. 2. Apply molybdenum disulfide grease (color is black) at least once a day. Put the grease into the chuck grease nipple until the grease overflows the jaw face or the inner hole of the chuck (the inner hole protective sleeve and the connecting nut). When the chuck is rotating or a large amount of water-based cutting oil is used in processing, it needs more lubrication. It must be determined according to different situations. 3. At the end of the operation, be sure to clean the chuck body and the slide surface with an air gun or similar tools. 4. Remove the chuck for disassembly and cleaning at least every 6 months, keep the sliding surface of the jaws clean and lubricate, and increase the life of the chuck. However, if the cast iron is cleaned at least once or more every two months, check all parts for cracks and wear, and replace it with a new one immediately. After the inspection is completed, sufficient oil can be supplied before assembly. 5. For different workpieces, you must use different clamping methods or choose to make special fixtures. The three-jaw chuck is only a general-purpose type of jig. Barely using it to clamp irregular or strange workpieces will cause damage to the chuck! If the chuck pressure is abnormal, the chuck will be under high pressure or the machine After shutting down, the chuck will also clamp the workpiece, which will reduce the chuck life! So when you find that the chuck gap is too large, you must immediately replace the new chuck. 6. The use of cutting oil with anti-rust effect can prevent the rust inside the chuck, because the rust of the chuck will reduce the clamping force and cannot clamp the workpiece [2]
- Due to the long-term use of the chuck, the jaws of the chuck are worn out within a day, and they are often flared, and the centering is not good, which affects the clamping and processing accuracy of the workpiece. For this reason, a grinding method is used to repair the inner mouth of the three-jaw chuck jaw. This method is simple, economical, and effective.
- Chuck