Gear grinding machine

Patent metadata

Field	Value
Publication number	US-9511477-B2
Application number	US-201113820203-A
Country	US
Kind code	B2
Filing date	Aug 25, 2011
Priority date	Sep 7, 2010
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

Provided is a gear grinding machine which can dress a grinding stone while a gear is held attached to the machine regardless of the size of the gear. To this end, the gear grinding machine ( 1 ) engages and mutually rotates a work (W) and the grinding stone ( 17 ) to thereby grind the work (W), wherein the gear grinding machine is equipped with a turning table ( 22 ) which holds the work (W) and rotates around a work rotating shaft (C), and a pivot table ( 31 ) which is pivotably supported around the work rotating shaft (C); and a dresser ( 40 ) which is capable of dressing the grinding stone ( 17 ) is provided on the pivot table ( 31 ), the pivot table ( 31 ) being pivoted to move the dresser ( 40 ) between a dressing position (D 1 ) and a retreat position (D 2 ).

First claim

The invention claimed is:

1. A gear grinding machine for performing grinding on a gear to be machined by rotating the gear to be machined and a grinding wheel in mesh with each other, the gear grinding machine comprising:
a rotary table configured to hold the gear to be machined and to rotate about a workpiece rotation axis;
grinding wheel moving means for rotatably supporting the grinding wheel and moving the grinding wheel relative to the workpiece rotation axis;
a ring-shaped turn table disposed coaxially with the rotary table at a position radially outside the rotary table, and supported turnably about the workpiece rotation axis;
dressing means provided on the turn table and having a dresser capable of dressing the grinding wheel;
table turning means for turning the turn table about the workpiece rotation axis in such a way that the dressing means moves between a dressing position where the dressing means is capable of dressing the grinding wheel supported by the grinding wheel moving means and a retreat position where the dressing means is retreated from the dressing position during the grinding;
a stationary table provided radially outside the rotary table and configured to support the rotary table with the rotary table being rotatable about the workpiece axis; and
an annular groove provided in a radially-outer portion of the stationary table and configured to house the turn table with the turn table being turnable.

2. The gear grinding machine according to claim 1 , wherein the table turning means turns the turn table about the workpiece rotation axis in such a way that the dressing means moves to a dresser replacement position where replacement of the dresser is possible.

3. The gear grinding machine according to claim 1 , wherein
the gear grinding machine further comprises a grinding wheel receiving stage provided on the turn table and configured in such a way that the grinding wheel is mounted on the gear grinding wheel receiving stage, and
the table turning means turns the turn table about the workpiece rotation axis in such a way that the grinding wheel receiving stage moves between a grinding wheel replacement position where replacement of the grinding wheel in the grinding wheel moving means is possible and a grinding wheel loading/unloading position where loading and unloading of the grinding wheel to and from the grinding wheel receiving stage is possible.

Assignees

• Katsuma Toshifumi
• Watanabe Kunihiro
• Kikuchi Toshimasa
• Mitsubishi Heavy Ind Machine Tool Co Ltd

Inventors

• Katsuma Toshifumi
• Watanabe Kunihiro
• Kikuchi Toshimasa

Classifications

• B23F23/1225

  Arrangements of abrasive wheel dressing devices on gear-cutting machines (dressing devices per se B24B53/00) · CPC title

• B23F5/04

  the tool being a grinding worm · CPC title

• B24B53/075 Primary

  for workpieces having a grooved profile, e.g. gears, splined shafts, threads, worms (B24B53/07 takes precedence) · CPC title