Dressing device and gear grinding device

Patent metadata

Field	Value
Publication number	US-10610941-B2
Application number	US-201314432575-A
Country	US
Kind code	B2
Filing date	Jul 19, 2013
Priority date	Oct 17, 2012
Publication date	Apr 7, 2020
Grant date	Apr 7, 2020

Abstract

This dressing device has: a gear grinding tool spindle ( 7 ) that rotatably supports a screw-shaped grindstone ( 10 ); and a dressing tool ( 30 ) that dresses the screw-shaped grindstone ( 10 ). The dressing device dresses the screw-shaped grindstone ( 10 ) by driving the screw-shaped grindstone ( 10 ) to rotate, and causing the relative motion of the screw-shaped grindstone ( 10 ) and/or the dressing tool ( 30 ). The dressing device performs a dressing process on the screw-shaped grindstone ( 10 ) in a manner such that the pressure angle changes along the direction of the tooth line by means of moving the screw-shaped whetstone ( 10 ) and/or dressing tool ( 30 ) at a fixed speed and altering the speed of rotation of the screw-shaped grindstone ( 10 ), or rotating the screw-shaped grindstone ( 10 ) at a fixed speed and altering the speed of motion in the axial direction of the screw-shaped grindstone ( 10 ) and/or the dressing tool ( 30 ).

First claim

The invention claimed is:

1. A dressing method comprising:
rotatably supporting a gear grinding tool spindle for driving a threaded grinding wheel used for machining of a gear;
rotatably supporting a dressing tool parallel to the gear grinding tool spindle for dressing the threaded grinding wheel; and
dressing the threaded grinding wheel by rotationally driving the threaded grinding wheel; bringing the threaded grinding wheel and the dressing tool into contact with each other; and moving at least one of the threaded grinding wheel and the dressing tool relative to the other in an axial direction of the threaded grinding wheel and the dressing tool, wherein
a dressing process is performed by moving at least one of the threaded grinding wheel and the dressing tool in the axial direction at a constant speed while changing a rotating speed of the threaded grinding wheel according to a relative movement of the dressing tool from one end side to another end side of the threaded grinding wheel; or changing a moving speed of at least one of the threaded grinding wheel and the dressing tool in the axial direction according to a relative movement of the dressing tool from one end side to the other end side of the threaded grinding wheel while rotating the threaded grinding wheel at a constant speed;
whereby the dressing process performed on the threaded grinding wheel includes varying a pressure angle from the one end side to the other end side in a tooth trace direction and varying a lead from the one end side to the other end side in the axial direction.

2. A gear grinding device comprising:
a work gear spindle by which a work gear is rotatably supported; and
a gear grinding tool spindle by which a threaded grinding wheel configured to grind the work gear is rotatably supported and which is parallel to a direction orthogonal to the work gear spindle,
the gear grinding device being configured to perform bias adjustment of the work gear by using the threaded grinding wheel, wherein
a tool in which a pressure angle varies from one end side to the other end side in a tooth trace direction and a lead varies from the one end side to the other end side in an axial direction is used as the threaded grinding wheel,
the work gear and the threaded grinding wheel are rotationally driven and at least one of the work gear and the threaded grinding wheel is moved from the one end side to another end side in the axial direction of the threaded grinding wheel so that a tooth face of the threaded grinding wheel in which the pressure angle varies comes into contact with a tooth face of the work gear, and
a number of revolutions of the work gear is varied to correspond to variation of a lead of the threaded grinding wheel according to a relative movement of the work gear from the one end side to the other end side of the threaded grinding wheel.

3. A dressing device comprising:
a rotatably supported gear grinding tool spindle for driving a threaded grinding wheel for machining of a gear; and
a rotatably supported dressing tool which is parallel to the gear grinding tool spindle and which dresses the threaded grinding wheel,
the dressing device being configured to rotationally drive the threaded grinding wheel; to bring the threaded grinding wheel and the dressing tool into contact with each other; and to move at least one of the threaded grinding wheel and the dressing tool relative to the other in an axial direction of the threaded grinding wheel and the dressing tool, wherein
the dressing device is configured to move at least one of the threaded grinding wheel and the dressing tool in the axial direction at a constant speed while changing a rotating speed of the threaded grinding wheel according to a relative movement of the dressing tool from one end side to another end side of the threaded grinding wheel; or to change a moving speed of at least one of the threaded grinding wheel and the dressing tool in the axial direction according to a relative movement of the dressing tool from one end side to the other end side of the threaded grinding wheel while rotating the threaded grinding wheel at a constant speed, whereby a dressing process performed on the threaded grinding wheel varies a pressure angle from the one end side to the other end side in a tooth trace direction and varies the lead from the one end side to the other end side in the axial direction.

Assignees

• Mitsubishi Heavy Ind Machine Tool Co Ltd
• Daicel Corp

Inventors

• Yanase Yoshikoto
• Kambayashi Satoru
• Hiroki Go

Classifications

• B24B53/075

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

• B23F23/1225 Primary

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

• B24B53/085

  for workpieces having a grooved profile, e.g. gears, splined shafts, threads, worms {(B24B53/082, B24B53/083, B24B53/09 take precedence)} · CPC title

• B23F9/02

  by grinding · CPC title

• B23F5/04

  the tool being a grinding worm · CPC title