In the use of spring collets, the designed locking angle (or head inclination) will determine the index that can be achieved after the clamping force is enlarged. The standard taper (or head inclination) varies according to the machine tool type (such as lathe, etc.), use conditions (dynamic and static) and purpose (workpiece and tool), and is usually determined by the machine tool manufacturer and the spring collets manufacturer.
Dezhou Newrgy will introduce to you how to make the spring collet without runout: factors affecting the correct clamping and positioning of various spring collets:
1. Factors affecting clamping force
Clamping force is the force applied by the machine tool to the workpiece through the spring collet. The conical surface at the front end of the machine tool spindle, called the locking angle, converts the axial tension into a clamping force perpendicular to the center of the spring collet. Not only that, the clamping force can also be amplified by the locking angle. According to calculations, the clamping force of the spring collet can be amplified by 3-4 times according to different locking angles.
2. Axial force
In the use of spring chucks, axial force and tension can be applied in different ways, but their working principles are basically the same. Obviously, a large axial tension will produce a large clamping force, and vice versa.
Selecting the appropriate spring chuck diameter size to ensure that the spring chuck fully supports the workpiece is a necessary condition for increasing the clamping force and reliable clamping to ensure high-quality processing. The spring chuck must maintain the same positioning reference as the workpiece (or tool) such as the spindle.
Cutting tests and years of actual use have proved that spring chucks can meet the processing needs of increasing cutting speeds and have a long service life. We know that more than 100 years ago, the spindle speed was generally measured in hundreds of revolutions per minute. Today, the spindle speed is as high as tens of thousands of revolutions per minute, and the material removal rate is also increasing at an astonishing rate.