Provided is a control device for a machine tool, the control device being capable of reliably reducing noise when gears mesh with each other and providing intended machining quality. A control device 10 for a machine tool machines a workpiece W including at least one tooth surface and comprises: a machining condition input unit 15 which can input a machining condition including at least one of specifications of the workpiece W, specifications of a tool T, a feed speed, the rotational speed of a spindle, and the number of teeth; a surface pattern calculation unit 16, which calculates, on the basis of the machining condition, a surface pattern defined on the basis of intervals of scratches occurring on a machined surface; a swing command generation unit 17, which generates, on the basis of the surface pattern, a swing command for achieving a surface pattern including a portion in which the intervals of the scratches are unequal; and a position and speed control unit 14 which carries out the machining while swinging the workpiece W and the tool T relatively to each other on the basis of the swing command generated by the swing command generation unit 17.

A lapping device for gear helix artifact with equal common normal by rolling method, use the rotary table to accurately control the angle between the lapping surface of whetstone and the axis of the base-circle cylinder to control the helix angle of base-circle about the involute helicoid. Use the whetstone driven component to drive the whetstone to make a high-precision linear motion in the vertical direction to adjust the position of the lapping surface of whetstone. The distance between the two lapping surface of whetstone is precisely adjusted by the gauge block to control the processing length of the three tooth common normal of the gear helix artifact. The invention provides a lapping device for gear helix artifact with equal common normal by rolling method, it conforms to the generation principle of the involute helicoid, and there is no machining principle error.

A method of manufacturing a gear is provided. The method includes forming a plurality of gear teeth in a surface of a gear, the gear teeth having tooth faces defining tooth edges including tooth edge flanks and tooth edge top land and generating a convex contour at an edge break of at least one of the tooth edge flanks and tooth edge top land.

A method includes the following method steps: grinding of bevel gears, wherein the respective bevel gears have a straight toothing to be ground, wherein the grinding is carried out by a disk-shaped grinding tool by discontinuous generating grinding using a predetermined rolling ratio. A cutting face of the grinding tool, which rolls during the grinding with teeth of the straight toothing of a respective bevel gear, forms a section of a hollow cone inner surface, and wherein a respective longitudinal crowning is generated on the respective straight toothing of the respective bevel gears by the grinding using the cutting face forming the section of the hollow cone inner surface. The method is distinguished in that the grinding tool is a dressable grinding tool and dressing of the grinding tool is carried out.

A method for hard finishing two different toothings on a workpiece, wherein, prior to each machining process, to set the correct tool engagement position for the machining process, a first relative rotational angle position of a first rotational position reference of the first toothing is determined relative to an axial rotational position of the workpiece spindle holding and clamping the workpiece for the first machining, and a second relative rotational angle position of a second rotational position reference of the second toothing is determined relative to an axial rotational position of a workpiece spindle holding and clamping the workpiece for the second machining, wherein the machining operations are carried out on the same workpiece spindle with no intervening clamping change, and with the first and second rotational position references coupled to each other as the basis thereof.

A method for the manufacture of a gear component includes, in a soft machining process, introducing a preliminary toothing 3 with a machining allowance 7 that is fixed relative to a final toothing 4 into a blank such that a semi-finished part 2 is produced. The method also includes, in a fine machining process, removing the machining allowance 7 and producing the final toothing 4 of the toothed component. The machining allowance 7 is removed in a single-stage hobbing method by a grinding tool 1, wherein the grinding tool 1 removes the machining allowance completely in a single stroke movement H.

A method for the manufacture of a gear component includes, in a soft machining process, introducing a preliminary toothing 3 with a machining allowance 7 that is fixed relative to a final toothing 4 into a blank such that a semi-finished part 2 is produced. The method also includes, in a fine machining process, removing the machining allowance 7 and producing the final toothing 4 of the toothed component. The machining allowance 7 is removed in a single-stage hobbing method by a grinding tool 1, wherein the grinding tool 1 removes the machining allowance completely in a single stroke movement H.

The invention relates to a method and a machine tool for hard finishing toothed gearing, particularly internally toothed portions (3), in which method a toothed hard finishing tool (W) which rotates about its axis of rotation is brought into rolling machining engagement with the machined toothed gearing in one pass or in a plurality of passes of differing radial infeed depth under an advance motion with a direction component parallel to the axis of rotation (C) of the machined toothed gearing and under a non-null axis crossing angle, and material is removed from the machined toothed gearing with a tooth flank region (4a) of the machine tool gearing with tooth thickness increasing in the tooth trace direction from the end face (5) facing the machined toothed gearing.

The invention relates to a method and a machine tool for hard finishing toothed gearing, particularly internally toothed portions (3), in which method a toothed hard finishing tool (W) which rotates about its axis of rotation is brought into rolling machining engagement with the machined toothed gearing in one pass or in a plurality of passes of differing radial infeed depth under an advance motion with a direction component parallel to the axis of rotation (C) of the machined toothed gearing and under a non-null axis crossing angle, and material is removed from the machined toothed gearing with a tooth flank region (4a) of the machine tool gearing with tooth thickness increasing in the tooth trace direction from the end face (5) facing the machined toothed gearing.

For the precision machining of a workpiece (10) provided with gearing (11) and rotating about a rotation axis (Dw), teeth (3) of a gear-cutting tool (1) rotating about a rotation axis (Dz) are brought into engagement with teeth (12) of the workpiece (10), and the gear-cutting tool (1) and the workpiece (10) are moved relative to each other in a direction (AX+, AX−) parallel to the rotation axis (Dw). The thickness (dZ) of the teeth (3) of the gear-cutting tool (1) increases in the axial direction, starting from the respective front ends (4, 5) of the teeth, until a thickness maximum (dZmax) is reached. High material removal performances and long-term durability of the gear-cutting tool (1) are achieved in that, according to the invention, 2≤Bw/Bz≤20 applies (wherein Bw=width Bw of the teeth of the gearing (11) of the workpiece (10), Bz=width of the teeth (3) of the gear-cutting tool (1)), that the gear-cutting tool (1), before each pass of its teeth (3) through the tooth gaps (17) of the workpiece (10) in the respective axial directions (AX+, AX−), is positioned at a position (P1, P2) in which the thickness maximum (dZmax) of the teeth (3) of the gear-cutting tool (1) is situated outside the gearing (11) of the workpiece (10), and that as a consequence of the relative movement of the workpiece (10) and of the gear-cutting tool (1) in the axial direction (AX+, AX−), the teeth (3) of the gear-cutting tool (1) are each moved through the respective tooth gaps (17) of the gearing (11) of the workpiece (10) that are assigned to them, until the thickness maximum (dZmax) of each tooth (3) has exited the assigned tooth gap (17).