The invention concerns a method of machining a workpiece, wherein an end-facing tooth edge of a gear profile of the workpiece that was generated by a chip-removing machining process is reworked at a first location into a chamfered edge by way of a plastic forming operation. The material which in the plastic forming operation was displaced towards the end surface of the gear profile is pushed outward as a material protrusion in the end surface of the tooth, while the material displaced towards the flank of the tooth is pushed outward as a material protrusion on the flank side of the chamfer, and the resulting material protrusions in the end surface and on the flank side are removed. The workpiece, while still carrying the material protrusion on the end surface of the gear profile, is transferred to a second location where the protrusion on the flank side of the chamfer is removed.

The present disclosure provides a worm gear machine, including a workbench, a cutter holder and a cutter holder adjusting system, where the cutter holder includes a big bracket, a first slide rail is disposed on the big bracket, a slide seat in sliding fit with the first slide rail is disposed on the first slide rail, a second slide rail is disposed on the slide seat, a small bracket in sliding fit with the second slide rail is disposed on the second slide rail; and a cutter holder spindle is disposed between the big bracket and the slide seat, a cutter bar synchronously rotating with the cutter holder spindle is disposed between an end of the cutter holder spindle facing toward the small bracket and the small bracket, and a gearbox for driving the cutter spindle to rotate is disposed in the big bracket.

The present disclosure provides a worm gear machine, including a workbench, a cutter holder and a cutter holder adjusting system, where the cutter holder includes a big bracket, a first slide rail is disposed on the big bracket, a slide seat in sliding fit with the first slide rail is disposed on the first slide rail, a second slide rail is disposed on the slide seat, a small bracket in sliding fit with the second slide rail is disposed on the second slide rail; and a cutter holder spindle is disposed between the big bracket and the slide seat, a cutter bar synchronously rotating with the cutter holder spindle is disposed between an end of the cutter holder spindle facing toward the small bracket and the small bracket, and a gearbox for driving the cutter spindle to rotate is disposed in the big bracket.

The present invention achieves a machining apparatus which can easily be composed and a machining method which can perform gear machining or splined shaft machining easily by using an existing lathe. More specifically, the invention achieves a machining apparatus 1 comprising: a cutter 11 which includes a blade part 20 formed in the shape of a ring around a peripheral surface thereof and which is driven to rotate about an axis thereof; a workpiece holder 13 which holds a workpiece W rotatably; and a cutter driver 12 which moves the cutter 11 and the workpiece W relative to each other along an axial direction, wherein a gear or a splined shaft is formed on the peripheral surface of the workpiece W by synchronizing the rotation of the workpiece W with the relative movement of the cutter 11 and the workpiece W and by rotating the cutter 11, and wherein a plurality of the blade parts 20 are disposed side by side along the axis, the cutter driver 12 drives the cutter 11 to rotate in one direction around the axis and to reciprocate relative to the workpiece W along the axis, the workpiece holder 13 rotates the workpiece W in a forward/reverse direction in accordance with reciprocation of the cutter 11, and cutting is performed on the workpiece W so as to form thereon an external shape of a gear or a splined shaft by placing each of the blade parts 20 of the cutter 11 in contact with the peripheral surface of the workpiece W.

The present invention achieves a machining apparatus which can easily be composed and a machining method which can perform gear machining or splined shaft machining easily by using an existing lathe. More specifically, the invention achieves a machining apparatus 1 comprising: a cutter 11 which includes a blade part 20 formed in the shape of a ring around a peripheral surface thereof and which is driven to rotate about an axis thereof; a workpiece holder 13 which holds a workpiece W rotatably; and a cutter driver 12 which moves the cutter 11 and the workpiece W relative to each other along an axial direction, wherein a gear or a splined shaft is formed on the peripheral surface of the workpiece W by synchronizing the rotation of the workpiece W with the relative movement of the cutter 11 and the workpiece W and by rotating the cutter 11, and wherein a plurality of the blade parts 20 are disposed side by side along the axis, the cutter driver 12 drives the cutter 11 to rotate in one direction around the axis and to reciprocate relative to the workpiece W along the axis, the workpiece holder 13 rotates the workpiece W in a forward/reverse direction in accordance with reciprocation of the cutter 11, and cutting is performed on the workpiece W so as to form thereon an external shape of a gear or a splined shaft by placing each of the blade parts 20 of the cutter 11 in contact with the peripheral surface of the workpiece W.

A worm reduction gear satisfies following relational Formula (1) and Formula (2):
3D2/D11.7(1)
0.10.5(2)
where D1 is an outside diameter of a worm, D2 is an outside diameter of a hob for cutting a worm wheel to form tooth spaces, and is a pressure angle of the worm wheel and is a pressure angle of the worm at an intermeshing pitch circle of the worm and the worm wheel.

A worm reduction gear satisfies following relational Formula (1) and Formula (2):
3D2/D11.7(1)
0.10.5(2)
where D1 is an outside diameter of a worm, D2 is an outside diameter of a hob for cutting a worm wheel to form tooth spaces, and is a pressure angle of the worm wheel and is a pressure angle of the worm at an intermeshing pitch circle of the worm and the worm wheel.

The invention concerns a gear-cutting machine for the machining of gear teeth with a gear-cutting tool driven in rotary movement about its tool axis, further with an assembly that includes a tool holder for the gear-cutting tool and is rotatably mounted on a carrier, allowing the tool axis to be set in a desired orientation, with an actuator device through which the assembly can be set to a desired angular position, and with a locking device that allows the assembly to be secured against being dislodged from the set angular position. According to the invention, a protruding arm that is a functional element of the actuator device is coupled to the assembly through a non-rotatable connection.

The invention concerns a gear-cutting machine for the machining of gear teeth with a gear-cutting tool driven in rotary movement about its tool axis, further with an assembly that includes a tool holder for the gear-cutting tool and is rotatably mounted on a carrier, allowing the tool axis to be set in a desired orientation, with an actuator device through which the assembly can be set to a desired angular position, and with a locking device that allows the assembly to be secured against being dislodged from the set angular position. According to the invention, a protruding arm that is a functional element of the actuator device is coupled to the assembly through a non-rotatable connection.

The present invention achieves a machining apparatus which can easily be composed and a machining method which can perform gear machining or splined shaft machining easily by using an existing lathe. More specifically, the invention achieves a machining apparatus 1 comprising: a cutter 11 which includes a blade part 20 formed in the shape of a ring around a peripheral surface thereof and which is driven to rotate about an axis thereof; a workpiece holder 13 which holds a workpiece W rotatably; and a cutter driver 12 which moves the cutter 11 and the workpiece W relative to each other along an axial direction, wherein a gear or a splined shaft is formed on the peripheral surface of the workpiece W by synchronizing the rotation of the workpiece W with the relative movement of the cutter 11 and the workpiece W and by rotating the cutter 11, and wherein a plurality of the blade parts 20 are disposed side by side along the axis, the cutter driver 12 drives the cutter 11 to rotate in one direction around the axis and to reciprocate relative to the workpiece W along the axis, the workpiece holder 13 rotates the workpiece W in a forward/reverse direction in accordance with reciprocation of the cutter 11, and cutting is performed on the workpiece W so as to form thereon an external shape of a gear or a splined shaft by placing each of the blade parts 20 of the cutter 11 in contact with the peripheral surface of the workpiece W.