Shrinking coil with direct tool cooling

摘要

The present invention relates to a device for tensioning or de-tensioning tools, having a tool shaft in a tool chuck which has a sheath section open on the free end thereof and which is made of electrically conductive material, for receiving the tool shaft in a friction connection, having an induction coil which surrounds the sheath section of the tool chuck, to which preferably high-frequency alternating current can be applied, and which is designed as a ring or cylinder coil, wherein the device has at least one channel running between the inner peripheral surface of the induction coil and the sheath section of the tool chuck, through which flows a cooling agent which cools the sheath section of the tool chuck.

主权项

1. A device for clamping and/or unclamping tools comprising:
a tool chuck including a sleeve section made of electrically conductive material and open at one end; an induction coil surrounding the sleeve section of the tool chuck, the induction coil being configured to heat the sleeve section; and at least one channel filled with coolant and positioned between the induction coil and the sleeve section of the tool chuck, wherein the sleeve section defines at least a portion of the at least one channel so that the coolant contacts the sleeve section and the portion of the at least one channel defined by the sleeve section is at least substantially sealed relative to ambient; and a seal positioned in contact with the sleeve section to at least substantially seal the at least one channel relative to ambient.