ラックバーの焼入装置及び焼入方法

Title:

ラックバーの焼入装置及び焼入方法

Document Type and Number:

Japanese Patent JP7101092

Kind Code:

B2

Abstract:

A quenching device for a rack bar having a rack formed within a partial section of an entire length of a hollow shaft member includes a plurality of binding jigs which binds the rack bar along the partial section and from a radial direction of the rack bar. Each of the binding jigs includes a spraying portion, and the spraying portion of each of the plurality of binding jigs sprays a coolant uniformly to a plurality of annular regions on an outer peripheral surface of the rack bar within the partial section, each of the annular regions extending around the outer peripheral surface and including a corresponding tooth bottom of the rack. By spraying the coolant uniformly thereto, irregularity of a tooth pitch of the rack due to quenching distortion is suppressed, so that an accuracy of the rack bar is improved.

Inventors:

Takashi Yamawaki
Atsushi Kishimoto

Application Number:

JP2018179177A

Publication Date:

July 14, 2022

Filing Date:

September 25, 2018

Export Citation:

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