US 8,939,687 B2 · Hob peeling device and method

Abstract

A device for cutting teeth in gear blanks by hob peeling, the device having a workpiece spindle for holding the gear blank, the workpiece spindle being rotationally drivable about a workpiece rotational axis, the device having a tool spindle which carries a peeling wheel having cutting edges and which is rotationally drivable about a tool rotational axis, wherein the tool spindle and the workpiece spindle may be positioned relative to one another at a fixed or variable axis intersection angle, and for the purpose of forward feed and infeed, the tool spindle is movable relative to the workpiece spindle in the radial direction and in the axial direction with reference to the workpiece rotational axis by means of positioning drives, and the device having an electronic control device for controlling the positioning drives and rotationally driving the tool spindle and the workpiece spindle at a specified rotational speed ratio, optionally with a changing phase position. In order to expand the production spectrum, it is proposed that the control device is set up or may be set up in such a way that during cutting of teeth in a coarsely precut or uncut blank, a radial emerging motion out of the gear blank is superimposed on the axial feed at the end of the feed, and/or a radial submerging motion into the gear blank is superimposed on the axial feed at the start of the feed.

Claims13

Dependent claims

A method for cutting teeth in gear blanks by hob peeling, using a peeling wheel which has cutting edges, using a workpiece spindle for holding the gear blank, the workpiece spindle being rotationally driven about a workpiece rotational axis, and using a tool spindle which carries a peeling wheel and is rotationally driven about a tool rotational axis, wherein the tool spindle and the workpiece spindle may be positioned relative to one another at a fixed or variable axis intersection angle, forward feed and infeed taking place, the tool spindle in the radial direction relative to the workpiece spindle and in the axial direction with reference to the workpiece rotational axis, and the drives of the tool spindle and the workpiece spindle are rotationally driven at a specified rotational speed ratio, characterized in that during cutting of teeth in a coarsely precut or uncut blank, a radial emerging motion of the tool spindle out of the gear blank is superimposed on the axial feed of the tool spindle at the end of the feed, and/or a radial submerging motion into the gear blank is superimposed on the axial feed at the start of the feed, so that gear teeth are produced in which the tooth grooves are closed at at least one end,

wherein the cutting of the gear teeth takes place in a plurality of successive steps, the tooth grooves of the gearing being deepened in a stepwise manner.

A device for cutting teeth in gear blanks by hob peeling, the device comprising:

a workpiece spindle for holding a coarsely precut or uncut gear blank, the workpiece spindle being rotationally drivable about a workpiece rotational axis, and
a tool spindle which carries a peeling wheel having cutting edges and which is rotationally drivable about a tool rotational axis,
wherein the tool spindle is moveable by means of positioning drives;
wherein the positioning drives, workpiece spindle drive and tool spindle drive are driven by an electronic control device in a program-controlled manner;
wherein the program in the electronic control device controls the tool spindle and the workpiece spindle drivable at the specified rotational speed ratio, wherein during cutting of teeth in a coarsely pre-cut or uncut blank, a radial emerging motion out of the gear blank of the tool spindle is superimposed on the axial feed of the tool spindle at the end of the feed and/or a radial submerging motion into the gear blank of the tool spindle is superimposed on the axial feed of the tool spindle at the start of the feed, so that the gear teeth are produced in which the tooth grooves are closed at at least one end, and
wherein the cutting of the gear teeth takes place in a plurality of successive steps and the tooth grooves of the gearing are deepened in a stepwise manner,
wherein by deepening the tooth grooves in a stepwise manner during the cutting, each of the tooth grooves forms a step from the bottom of the groove in axial direction to the uncut surface of the workpiece.

4 more elements

Dependencies are inferred from the claim text.

Hob peeling device and method

Life of this patent

Hob peeling device and method

Life of this patent

Abstract

Claims13