Insert, tool holder, and assembly thereof

Patent metadata

Field	Value
Publication number	US-10112241-B2
Application number	US-201415033663-A
Country	US
Kind code	B2
Filing date	Nov 7, 2014
Priority date	Dec 30, 2013
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

A technical object of the present disclosure is to provide an insert, which can maintain rigidity thereof regardless of a clearance angle of a clearance surface that forms a circular cutting edge. To this end, the insert according to the present disclosure includes a circular upper surface, a circular lower surface, and a clearance surface portion connecting the upper surface and the lower surface. The clearance surface portion is divided into first and second clearance surfaces along a circumference thereof, by a first wave line that forms a waveform of valleys facing the lower surface and mounts facing the upper surface.

First claim

What is claimed is:

1. An insert, comprising:
a circular upper surface;
a circular lower surface; and
a clearance surface portion connecting the upper surface and the lower surface, the clearance surface portion being divided into first and second clearance surfaces along a circumference thereof, by a first wave line that forms a waveform of valleys facing the lower surface and mounts facing the upper surface, the first clearance surface being formed such that one end thereof is in contact with the upper surface and the other end faces the second clearance surfaces, a clearance angle of the first clearance surface with respect to a centerline that connects a center of the upper surface with a center of the lower surface being set to be greater than a clearance angle of the second clearance surface, the clearance surface portion further comprising a third clearance surface formed between the first and second clearance surfaces along the first wave line.

2. The insert of claim 1 , wherein the second clearance surface is divided by a first portion of the third clearance surface located at the valleys.

3. The insert of claim 2 , wherein the clearance surface portion further comprises a fourth clearance surface formed between the lower surface and a second portion of the second and third clearance surfaces that faces the lower surface, to provide a stepped portion between the second portion and the lower surface.

4. The insert of claim 3 , wherein the fourth clearance surface is formed such that an outer diameter thereof is less than an outer diameter of the second portion.

5. An insert, comprising:
a circular upper surface;
a circular lower surface; and
a clearance surface portion connecting the upper surface and the lower surface, the clearance surface portion being divided into first and second clearance surfaces along a circumference thereof, by a first wave line that forms a waveform of valleys facing the lower surface and mounts facing the upper surface, the first clearance surface comprising:
a first main clearance surface formed along a circumference of the first clearance surface at an equal distance apart from the upper surface; and
a first sub-clearance surface formed between the first main clearance surface and the second clearance surface.

6. The insert of claim 5 , wherein a clearance angle of the first main clearance surface with respect to a centerline connecting a center of the upper surface with a center of the lower surface is set to be greater than a clearance angle of the second clearance surface.

7. The insert of claim 6 , wherein the first clearance surface further comprises a transition surface formed between the first main clearance surface and the first sub-clearance surface, and having a greater clearance angle than that of the first main clearance surface.

8. The insert of claim 6 , wherein the clearance surface portion further comprises a lower clearance surface formed between the lower surface and a third portion of the second clearance surface that faces the lower surface, to provide a stepped portion between the third portion and the lower surface.

9. The insert of claim 8 , wherein the lower clearance surface is formed such that an outer diameter thereof is less than an outer diameter of the third portion.

10. A tool holder having the insert of claim 1 mounted thereon, the tool holder comprising:
a lower surface sheet portion, and a side surface sheet portion,
the side surface sheet portion being divided into first and second sheet surfaces along a circumference thereof, by a third wave line that forms a waveform of valleys facing the lower surface sheet portion and mountains facing the opposite of the lower surface sheet portion.

11. The tool holder of claim 10 , wherein a boundary portion between the first and second sheet surfaces has a stepped shape, and
the boundary portion on a side of the first sheet surface is protruded further than the boundary portion on a side of the second sheet surface.

12. An insert-tool holder assembly, comprising:
the insert of claim 1 ; and
a tool holder comprising a lower surface sheet portion, and a side surface sheet portion divided into first and second sheet surfaces along a circumference thereof, by a third wave line that forms a waveform of valleys facing the lower surface sheet portion and mountains facing the opposite of the lower surface sheet portion,
wherein the first clearance surface is positioned on the first sheet surface, and
the second clearance surface is positioned on the second sheet surface.

13. The insert-tool holder assembly of claim 12 , wherein a boundary portion between the first and second sheet surfaces has a stepped shape,
the boundary portion on a side of the first sheet surface is protruded further than the boundary portion on a side of the second sheet surface, and
the second clearance surface is locked by the boundary portion on the side of the first sheet surface,
wherein the first clearance surface is positioned on the first sheet surface, and
the second clearance surface is positioned on the second sheet surface.

14. An insert-tool holder assembly, comprising:
the insert of claim 5 ; and
a tool holder comprising a lower surface sheet portion, and a side surface sheet portion divided into first and second sheet surfaces along a circumference thereof, by a third wave line that forms a waveform of valleys facing the lower surface sheet portion and mountains facing the opposite of the lower surface sheet portion,
wherein the first clearance surface is positioned on the first sheet surface, and
the second clearance surface is positioned on the second sheet surface.

15. A tool holder having the insert of claim 5 mounted thereon, the tool holder comprising:
a lower surface sheet portion, and a side surface sheet portion,
the side surface sheet portion being divided into first and second sheet surfaces along a circumference thereof, by a third wave line that forms a waveform of valleys facing the lower surface sheet portion and mountains facing the opposite of the lower surface sheet portion.

16. The tool holder of claim 15 , wherein a boundary portion between the first and second sheet surfaces has a stepped shape, and
the boundary portion on a side of the first sheet surface is protruded further than the boundary portion on a side of the second sheet surface.

Assignees

• Korloy Inc

Inventors

• Lee Sang-Yong
• Nam Ki-Chan
• Lee Nam-Sun
• Lee Kane-Hee
• Ahn Sun-Yong
• Kim Young-Heum

Classifications

• B23C5/202 Primary

  Plate-like cutting inserts with special form (special form related to securing of the insert B23C5/22) · CPC title

• B23C5/207 Primary

  Operations & Transport · mapped topic

• B23C2210/168

  Seats for cutting inserts, supports for replacable cutting bits · CPC title

• B23C2200/128

  with one or more grooves · CPC title

• B23C2200/045

  Round · CPC title