Electromagnetic chuck mounting structure

• US 10,486,277 B2
• Filed: 11/01/2017
• Issued: 11/26/2019
• Est. Priority Date: 12/16/2016
• Status: Active Grant

• Current Assignee: Hwacheon Machine Tool Co., Ltd.
• Original Assignee: Hwacheon Machine Tool Co., Ltd.
• Inventors: Kwon, Hyoung Woon, Yeom, Kyu Yong, Kang, Kyung Hwan, Park, Dae Yu, Park, Yoon Jong, Moon, Seong Jun
• Primary Examiner(s): Musleh, Mohamad A
• Application Number:
  US15/800,484
• Publication Number:
  US 20180169808A1
• Time in Patent Office: 755 Days
• CPC Class Codes: B23Q 2703/02 Work clamping means
• CPC Class Codes: B23Q 3/1543 using electromagnets
• CPC Class Codes: H01F 7/021 Construction of PM H01F7/0278 takes precedence; PM compositions H01F1/032
• CPC Class Codes: H01F 7/0257 Lifting, pick-up magnetic objects

Abstract

Provided is an electromagnetic chuck mounting structure capable of tightly and fixedly mounting an electromagnetic chuck on a table without fluctuation, having light weight, and making a low profile when an electromagnetic chuck is mounted on the table. The structure includes: a mounting groove recessed on an upper surface of the table and located inward of an edge of the table; a plurality of mounting holes formed at regular intervals on the mounting groove to fix the electromagnetic chucks to be mounted; and an adhesive filled and cured on the mounting groove and between the mounted electromagnetic chucks, wherein each of the electromagnetic chucks is fixedly fastened to each of the mounting holes by one fastening bolt, such that an upper surface of each electromagnetic chuck is aligned on a same plane with the upper surface of the table or protrudes from the upper surface of the table.

Claims

1. A mounting structure for a plurality of electromagnetic chucks that receive power to fixedly attach a workpiece to a table of a machine tool, the mounting structure comprising:

a mounting groove recessed on an upper surface of the table and located inward of an edge of the table;

a plurality of mounting holes formed at regular intervals on the mounting groove to fix the plurality of electromagnetic chucks to be mounted; and

an adhesive filled and cured on the mounting groove and between the mounted plurality of electromagnetic chucks,

wherein each of the plurality of electromagnetic chucks is fixedly fastened to each of the plurality of mounting holes by one fastening bolt, such that an upper surface of the each of the plurality of electromagnetic chucks is aligned on a same plane with the upper surface of the table or protrudes from the upper surface of the table,

wherein the each of the electromagnetic chucks comprises;

an electromagnet core in which a coil is wound from a lower portion of the electromagnet core and a fastening bolt is inserted into a center of the electromagnet core; and

a chuck block disposed on an upper portion of the electromagnet core and inserted therein with the fastening bolt, and

wherein the chuck block is divided into a fixed chuck pole block embedded inside the adhesive and a contact chuck block detachably provided on an upper portion of the fixed chuck pole block so as to be replaceable when abraded due to contact with the workpiece.

2. The mounting structure of claim 1, further comprising a permanent magnet embedded inside the adhesive and disposed between the chuck blocks.

3. The mounting structure of claim 1, wherein the mounting groove is divided into a plurality of mounting grooves such that the plurality of electromagnetic chucks mounted in the plurality of mounting hole are divided into unit cells.

4. The mounting structure of claim 3, wherein the plurality of mounting grooves divided into the unit cells have a same area or mutually different areas.

5. The mounting structure of claim 2, wherein the mounting groove is divided into a plurality of mounting grooves such that the plurality of electromagnetic chucks mounted in the plurality of mounting hole are divided into unit cells.

6. The mounting structure of claim 5, wherein the plurality of mounting grooves divided into the unit cells have a same area or mutually different areas.