Machine tool

Patent metadata

Field	Value
Publication number	US-2022379421-A1
Application number	US-202017775783-A
Country	US
Kind code	A1
Filing date	Nov 10, 2020
Priority date	Nov 11, 2019
Publication date	Dec 1, 2022
Grant date	—

Abstract

A machine tool includes a bed that includes a guide unit, a first structure and a second structure that are each mounted over the bed, a first drive unit that moves the first structure along the guide unit, and a protector that covers at least part of the first drive unit. The protector is extendable and retractable with movement of the first structure, at least one of the first structure and the second structure includes a protector housing portion that houses at least part of the protector, and the protector housing portion is a space that is provided in a base portion of at least one of the first structure and the second structure and opened in a movement direction of the first structure. Accordingly, structures such as a headstock and a tool post can easily approach each other and the convenience of machining a workpiece by a machine tool can be increased.

First claim

1 . A machine tool comprising:
a bed that includes a guide unit; a first structure and a second structure that are each mounted over the bed; a first drive unit that moves the first structure along the guide unit; and a protector that covers at least part of the first drive unit, wherein the protector is extendable and retractable with movement of the first structure, at least one of the first structure and the second structure includes a protector housing portion that houses at least part of the protector, and the protector housing portion is a space that is provided in a base portion of at least one of the first structure and the second structure and opened in a movement direction of the first structure.

2 . The machine tool according to claim 1 , wherein
a first connection portion and a second connection portion of the protector that are positioned away from each other in an extension and retraction direction are attached to the first structure and the second structure, respectively.

3 . The machine tool according to claim 1 , wherein
the protector includes a plurality of cover bodies that are combined so as to be relatively movable and so that an adjacent pair of the cover bodies overlap at least partly.

4 . The machine tool according to claim 1 , wherein
if the space is provided in the base portion of the first structure, the space of the first structure is opened toward the second structure, and if the space is provided in the base portion of the second structure, the space of the second structure is opened toward the first structure.

5 . The machine tool according to claim 1 , wherein
the protector is supported by a long member provided along the movement direction of the first structure.

6 . The machine tool according to claim 5 , wherein
the protector includes a rotor that travels along the long member when the protector extends and retracts.

7 . The machine tool according to claim 5 , wherein
at least one of the first structure and the second structure includes at least one support member that supports the long member.

8 . The machine tool according to claim 5 , wherein
the long member is a wire rope or a rod member.

9 . The machine tool according to claim 1 , further comprising:
a second drive unit that moves the second structure along the guide unit, wherein at least part of the second drive unit is also covered with the protector.

10 . The machine tool according to claim 1 , wherein
the first structure is a tool post or a steady rest, and the second structure is a headstock or a tailstock.

11 . The machine tool according to claim 1 , wherein
the first structure is a table, and the second structure is a column where a spindle is placed.

12 . The machine tool according to claim 1 , wherein
the protector housing portion is a space that is provided in the base portion of at least one of the first structure and the second structure and opened only in the movement direction of the first structure.

Assignees

• Dmg Mori Co Ltd

Inventors

• NAKANISHI Tatsuhiro
• Kuriya Tatsuhiko
• Sakai Shigetsugu

Classifications

• B23Q11/0825 Primary

  Relatively slidable coverings, e.g. telescopic · CPC title

• B23Q11/0891 Primary

  arranged between the working area and the operator · CPC title

• B23B3/065

  Arrangements for performing other machining operations, e.g. milling, drilling · CPC title

• Y10T29/5109

  Lathe · CPC title

• Y10T82/2549

  Feedscrews and rods · CPC title