Tool holder for a cutting insert and process for manufacturing the tool holder
The invention relates to a tool holder ( 10 ) for a cutting insert ( 18 ), having a tool holder body ( 12 ), a recess ( 16 ) for a cutting insert ( 18 ), a clamping element ( 20 ) that can tightly clamp a cutting insert ( 18 ) in the recess ( 16 ), and at least one cooling channel ( 40, 42, 44, 50, 70, 72 ) through which the coolant can be conducted to the cutting insert ( 18 ), characterized in that the cross-sectional area and/or the cross-sectional shape of the cooling channel ( 40, 42, 44, 50, 70, 72 ) changes along its length. The invention also relates to a process for manufacturing such a tool holder ( 10 ), wherein the clamping element ( 20 ) is manufactured along with at least one part of the tool holder body ( 12 ) in an additive layer process.
1. A tool holder for a cutting insert, comprising:
a shaft with an abutment section;
a recess formed in the abutment section for receiving a cutting insert;
a clamping element for clamping a cutting insert in the recess, the clamping element having a front end; and
a main cooling channel formed in the shaft; and
a clamping element channel formed in the clamping element and in fluid communication with the main cooling channel,
wherein the clamping element channel has a plurality of side channels formed in the front end of the clamping element, each side channel of the plurality of side channels having an outlet for providing a stream of coolant, wherein the outlet for at least two side channels of the plurality of side channels have a different cross-sectional shape.
2. The tool holder of claim 1 , wherein the outlet for one of the plurality of side channels has a circular cross-sectional shape.
3. The tool holder of claim 1 , wherein the outlet for one of the plurality of side channels has a rectangular cross-sectional shape.
4. The tool holder of claim 1 , wherein the outlet for one of the plurality of side channels has multiple individual openings that together form a cluster.
5. The tool holder of claim 1 , wherein each side channel of the plurality of side channels has a smaller cross-sectional area than a cross-sectional area of the clamping element channel.
6. The tool holder of claim 1 , wherein at least one of the plurality of side channels includes a laterally disposed outlet for providing coolant to a minor cutting edge of the cutting insert.
7. The tool holder of claim 1 , further comprising a branch extending between the main cooling channel to the clamping element channel for fluidly connecting the main cooling channel to the clamping element channel.
8. The tool holder of claim 7 , wherein the branch extends at an angle relative to a longitudinal axis of the tool holder body, wherein the angle is 45 degrees.
9. The tool holder of claim 1 , further comprising a plate seat channel in fluid communication with the main cooling channel.
10. The tool holder of claim 9 , wherein the plate seat channel has a plurality of branches, each branch the plurality of branches having an outlet for providing a stream of coolant from underneath the cutting insert.
11. The tool holder of claim 10 , wherein the outlet for at least two branches of the plurality of branches have a different cross-sectional shape.
12. The tool holder of claim 11 , wherein the outlet for one of the plurality of branches has a circular cross-sectional shape.
13. The tool holder of claim 11 , wherein the outlet for one of the plurality of branches has a triangular cross-sectional shape.
14. The tool holder of claim 11 , wherein each branch of the plurality of branches has a smaller cross-sectional area than a cross-sectional area of the plate seat channel.
15. The tool holder of claim 1 , wherein a cross-sectional shape of the main cooling channel is different than a cross-sectional shape of the clamping element channel.
16. The tool holder of claim 1 , wherein the stream of coolant from each side channel on a front face of the front end is provided to a major cutting edge of the cutting insert.