Clamping member, machine tool, and method for manufacturing machined product

Patent metadata

Field	Value
Publication number	US-12036616-B2
Application number	US-202017610601-A
Country	US
Kind code	B2
Filing date	May 11, 2020
Priority date	May 13, 2019
Publication date	Jul 16, 2024
Grant date	Jul 16, 2024

Abstract

A clamping member in a non-limiting aspect of the present disclosure may have a columnar shape extended from a first end to a second end. The clamping member may include an upper jaw, a lower jaw and a pocket. The upper jaw and the lower jaw may be located away from each other. The pocket may be located between the upper jaw and the lower jaw. The upper jaw may include a first member and a second member. The second member may be located closer to the first end than the first member. Hardness of the first member may be first hardness, and hardness of the second member may be second hardness. The first hardness may be different from the second hardness.

First claim

The invention claimed is:

1. A clamping member, having a columnar shape extended in a direction from a first end to a second end, the clamping member comprising:
an upper jaw comprising:
a first member having a first hardness,
a second member having a second hardness different from the first hardness, being closer to the first end than the first member, and elongated in the direction,
a third member having a third hardness different from the first hardness, being closer to the second end than the first member, and elongated in the direction;

a lower jaw located away from the upper jaw; and
a pocket:
located between the upper jaw and the lower jaw, and
configured to receive a cutting tool,

wherein the first member, the second member, and the lower jaw are configured to fix the cutting tool in response to receiving the cutting tool, and
on a condition that the cutting tool is fixed to the clamp member, the first member contacts the cutting tool in a contact area, the second member contacts the cutting tool in an area closer to the first end than the contact area, the third member contacts an upper surface in an area closer to the second end than the contact area, and the lower jaw contacts the cutting tool.

2. The clamping member according to claim 1 , wherein the first hardness is lower than the second hardness.

3. The clamping member according to claim 1 , wherein the first hardness is lower than the third hardness.

4. The clamping member according to claim 1 , wherein
the lower jaw has a fourth hardness, and
the first hardness is lower than the fourth hardness.

5. The clamping member according to claim 1 , wherein
a length of the first member in an extending direction of the clamping member is a first length,
a length of the second member in the extending direction of the clamping member is a second length, and
a maximum value of the first length is larger than a maximum value of the second length.

6. The clamping member according to claim 1 , wherein
the first member comprises a first step,
the second member comprises a second step,
the first step comprises:
a first surface facing the first end,
a second surface facing the first end, and
a third surface between the first surface and the second surface,

the second step comprises:
a fourth surface facing the second end and opposed to the first surface,
a fifth surface facing the second end and opposed to the second surface, and
a sixth surface between the first surface and the second surface and in contact with the third surface.

7. A machine tool, comprising:
the clamping member according to claim 1 ; and
the cutting tool located in the pocket.

8. A method for manufacturing a machined product, comprising:
rotating a workpiece in the machine tool according to claim 7 ;
bringing the cutting tool in the machine tool according to claim 7 into contact with the workpiece being rotated; and
moving the cutting tool away from the workpiece.

9. A holder for clamping an object, the holder comprising:
a first clamping member elongated in a direction, and comprising:
a first member having a first hardness, a first clamping surface, and a first step,
a second member, the second member includes:
a second hardness different from the first hardness,
a second clamping surface that is on a line with the first clamping surface in the direction and a second step, and
being in contact with the first clamping member, and

a third member, the third member includes:
a third hardness different from the first hardness, being closer to the second end than the first member, and elongated in the direction; and

a second clamping member comprising a third clamping surface, opposed to the first clamping surface and the second clamping surface; and
a pocket surrounded by the first clamping surface, a second clamping surface and the third clamping surface, and the pocket configured to receive a cutting tool,
wherein the first step comprises:
a first surface facing the first end,
a second surface facing the first end, and
a third surface between the first surface and the second surface,

wherein the second step comprises:
a fourth surface facing the second end and opposed to the first surface,
a fifth surface facing the second end and opposed to the second surface, and
a sixth surface between the first surface and the second surface, and in contact with the third surface, and

on a condition that the cutting tool is fixed to the clamp member, the first member contacts the cutting tool in a contact area, the second member contacts the cutting tool in an area closer to the first end than the contact area, the third member contacts an upper surface in an area closer to the second end than the contact area.

10. The holder according to claim 9 , wherein the first hardness is lower than the second hardness.

11. The holder according to claim 9 , wherein the first hardness is lower than the third hardness.

12. The holder according to claim 9 , wherein the second clamping member has a fourth hardness that is larger than the first hardness.

13. The holder according to claim 9 , wherein
a length of the first member in an extending direction of the holder is a first length,
a length of the second member in the extending direction of the holder is a second length, and
a maximum value of the first length is larger than a maximum value of the second length.

14. The holder according to claim 9 , wherein
the first member comprises a first step, and
the second member comprises a second step, and the second step is in contact with the first step.

15. The holder according to claim 9 , wherein
the first member comprises a third step, and
the third member comprises a fourth step, and the fourth step is in contact with the third step.

16. A machining apparatus, comprising:
the holder according to claim 9 ; and
the cutting tool in the pocket.

17. A method for manufacturing a machined product, the method comprising:
setting the holder to the machining apparatus according to claim 16 ;
setting the cutting tool to the pocket of the holder according to claim 16 ;
set a workpiece to the machining apparatus;
rotating the workpiece;
contact the cutting tool to the workpiece such that the cutting tool removes a piece of the workpiece.

Assignees

• Kyocera Corp

Inventors

• Muranishi Toru
• Inoue Yoshihiro

Classifications

• B23B2210/08

  Tools comprising intermediary toolholders · CPC title

• B23B29/14

  affording a yielding support of the cutting tool, e.g. by spring clamping {(cutting tools with yieldable support for the cutting insert B23B27/086)} · CPC title

• B23B27/04

  Cutting-off tools (B23B27/08 takes precedence {; toolholders for cutting-off inserts B23B29/043}) · CPC title

• B23B27/086

  with yieldable support for the cutting insert · CPC title

• B23B29/06 Primary

  Tool holders equipped with longitudinally-arranged grooves for setting the cutting tool · CPC title