BUSH HARDENING METHOD OF CATERPILLAR BAND CHAIN

Title:

BUSH HARDENING METHOD OF CATERPILLAR BAND CHAIN

Document Type and Number:

Japanese Patent JP2002114177

Kind Code:

A

Abstract:

To provide an effective hardening method of a bush of a caterpillar band chain in a crawler type working machine.

This is a hardening method of a work piece having (i) an outer surface, (ii) an inner surface forming a passage penetrating through the work piece, and (iii) an end part. This method comprises steps of (A) inserting the work piece into a first induction coil for forming a first hardened part in the work piece, (B) inserting a second induction coil into the passage of the work piece to form a second hardened part on the work piece, and (C) mounting a third induction coil on the side of an end part of the work piece to form a third hardened part on the work piece. The step for mounting the third induction coil is executed after a step for inserting the work piece into the first induction coil, and a step for inserting the second induction coil into the passage.

Inventors:

ANDERTON PETER W
POND DENNIS C
AVOND TIMOTHY G VAN DEN
WOLDOW FREDRICK A

Application Number:

JP2001257511A

Publication Date:

April 16, 2002

Filing Date:

August 28, 2001

Export Citation:

Click for automatic bibliography generation Help

Assignee:

CATERPILLAR INC

International Classes:

B62D55/15; B62D55/21; C21D1/10; C21D1/42; C21D9/14; (IPC1-7): B62D55/15

Domestic Patent References:

JPH10140245A	1998-05-26
JPH06329056A	1994-11-29
JPS61261423A	1986-11-19
JPH06247351A	1994-09-06
JPH1068023A	1998-03-10
JPS58189327A	1983-11-05

Attorney, Agent or Firm:

Minoru Nakamura (9 outside)

Previous Patent: TRAILER CONNECTING ANGLE DETECTING DEVICE

Next Patent: KIND OF TIRE DISCRIMINATING DEVICE AND METHOD