Heat treatment apparatus

Patent metadata

Field	Value
Publication number	US-10568167-B2
Application number	US-201514965170-A
Country	US
Kind code	B2
Filing date	Dec 10, 2015
Priority date	Dec 11, 2014
Publication date	Feb 18, 2020
Grant date	Feb 18, 2020

Abstract

A heat treatment apparatus is configured to perform a heat treatment on a workpiece while rotating the workpiece. The heat treatment apparatus includes a rotary shaft configured to support the workpiece and on which a discharge nozzle is provided to spray cooling liquid toward the workpiece, a fixing base having a supply port and a discharge port for the cooling liquid, a coupling section coupling the fixing base and the rotary shaft to each other in a relatively rotatable manner, and a detector configured to detect a flow of the cooling liquid discharged from the discharge port. A supply passage and a discharge passage are formed inside the fixing base, the rotary shaft and the coupling section. The supply passage extends from the supply port and to the discharge nozzle. The discharge passage branches from the supply passage inside the rotary shaft and leads to the discharge port.

First claim

What is claimed is:

1. A heat treatment apparatus configured to perform a heat treatment on a workpiece while rotating the workpiece, the heat treatment apparatus comprising:
a rotary shaft configured to support the workpiece and on which a discharge nozzle is provided to spray cooling liquid toward the workpiece;
a fixing base having a supply port and a discharge port for the cooling liquid;
a coupling section coupling the fixing base and the rotary shaft to each other in a relatively rotatable manner;
a detector configured to detect a flow of the cooling liquid discharged from the discharge port; and
a heating coil,
wherein a supply passage and a discharge passage are formed inside the fixing base, the rotary shaft and the coupling section, the supply passage extending from the supply port to the discharge nozzle, and the discharge passage branching from the supply passage inside the rotary shaft and leading to the discharge port.

2. The heat treatment apparatus according to claim 1 , wherein the detector is configured to detect a flow rate of the cooling liquid discharged from the discharge port.

3. The heat treatment apparatus according to claim 1 , wherein the rotary shaft is made of a cylinder,
wherein the coupling section comprises a rotary joint coupling the rotary shaft and the fixing base to each other and having, inside the rotary joint, a flow passage leading into the rotary shaft, and an inner pipe inserted into the flow passage of the rotary joint and having end portion inserted into the rotary shaft, and
wherein the end portion of the inner pipe has at least one through hole formed through a peripheral wall of the inner pipe, and is provided with a seal member slidable between the rotary shaft and the inner pipe at a location closer to a distal end of the inner pipe than from the through hole.

4. The heat treatment apparatus according to claim 3 , wherein the flow passage of the rotary joint leads to the discharge port, and the inner pipe leads to the supply port.

5. The heat treatment apparatus according to claim 1 , further comprising a controller configured to continue or to stop the heat treatment based on a result of a detection by the detector.

6. The heat treatment apparatus according to claim 1 , wherein the cooling liquid is sprayed, when the workpiece is being heated by the heating coil, from the discharge nozzle toward a portion of the workpiece other than a heating target portion of the workpiece.

Assignees

• Neturen Co Ltd

Inventors

• Kajino Yoshimasa
• Kida Tatsushi

Classifications

• H05B6/102 Primary

  the metal pieces being rotated while induction heated · CPC title

• H05B6/06

  Control, e.g. of temperature, of power · CPC title