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Any product will produce wear after long-term use. For spring chucks, if the wear exceeds a certain limit, there will be a problem of not being able to clamp the workpiece firmly. This will directly affect the machining accuracy and production efficiency, and will virtually increase the manufacturing cost of the fixture. cost, bringing huge economic losses to the enterprise.

In order to improve the wear resistance of the collet, the hardness of the collet must be increased. If the hardness is too high, the elasticity of the collet will be weakened and the spring leaf will be easy to break. What improvements are needed to the spring collet? Longzhouli has accumulated rich production and sales experience to teach you how to reduce the wear problem of spring collets?

1. Finish turning the conical surface of the chuck: Use threaded tires to ensure the machining accuracy. After finishing each surface of the chuck body and drilling equal holes, the conical surface can be turned. When turning the conical surface, use the threaded surface as the positioning reference. , which can ensure the machining accuracy when turning conical surfaces. First, screw the chuck onto the threaded tire, then install the threaded tire onto the machine tool spindle, and then use the small tool holder on the pallet for cutting.

2. Grind the inner diameter of the spring chuck: Use the inner diameter grinding tire to ensure the accuracy of the grinding process. The inner diameter of the chuck is also a positioning surface. Use the inner diameter of the chuck to clamp the clamp block, and then use the clamp block to clamp the workpiece, so the accuracy of the inner diameter It also directly affects the accuracy of the workpiece being processed, which requires that the inner diameter and the conical surface must be coaxial. Use a special inner diameter grinding tool to clamp the spring chuck. This tire is positioned on a conical surface. After grinding, the inner diameter of the chuck can generally be coaxial with the cone surface up to 0.02mm.

3. Grinding the conical surface of the chuck: When grinding the conical surface of the chuck, thread tires are also used to ensure the grinding accuracy. The cone surface is an important positioning surface in the clamping process of the chuck. The accuracy of the cone surface directly affects the accuracy of the entire chuck. To design a set of thread clamping chucks for grinding, the positioning reference should still be threads. The grinding principle is as shown below. The coaxiality of the ground conical surface with respect to the thread surface can reach 0.1mm.

4. Regularly maintain the spring chuck: In actual use, the spring chuck must be loosened and replaced frequently. For example, when used on a turning machining center, a layer of lubricant can be sprayed on the inner hole surface of the spring chuck when loosening, if conditions permit. It's great to use coolant lubrication, which both washes away debris from the collet and provides excellent lubrication. Regularly applying grease to the locking corners of the spring chuck can reduce long-term wear and increase the clamping force.

5. Reasonably select the clamping diameter and length standard of the spring chuck: it can ensure the larger clamping force of the spring chuck and ensure the high quality and high precision of machining. Assume that the inner diameter of the spring chuck is too large. When the chuck is closed, it is only clamped by the orifice part of the spring chuck. Due to the composition of the spring chuck, the outer circle and the inner hole of the spring chuck do not match the geometric rules of each other. This reduces the clamping force.

In order to reduce the difficulty of spring chuck processing, reduce unnecessary waste of materials, and improve production efficiency, Longzhouli recommends that you improve the chuck according to the above methods!