Provided is a manufacturing method for a compound screw having a first thread groove and a second thread groove with a different lead angle or lead direction from the first thread groove, wherein at least a portion of the first thread groove is formed by feeding a threading tool that acts on a workpiece a first feed amount toward the workpiece, the workpiece being a rotating object to be machined. Additionally, at least a portion of the second thread groove is formed by feeding the threading tool that acts on the workpiece a second feed amount that differs from the first feed amount. With these steps, a compound thread portion is formed in the workpiece. As a result, it is possible to mass produce a compound screw having two thread structures of differing lead angles and/or lead directions with a high level of quality.

Provided is a manufacturing method for a compound screw having a first thread groove and a second thread groove with a different lead angle or lead direction from the first thread groove, wherein at least a portion of the first thread groove is formed by feeding a threading tool that acts on a workpiece a first feed amount toward the workpiece, the workpiece being a rotating object to be machined. Additionally, at least a portion of the second thread groove is formed by feeding the threading tool that acts on the workpiece a second feed amount that differs from the first feed amount. With these steps, a compound thread portion is formed in the workpiece. As a result, it is possible to mass produce a compound screw having two thread structures of differing lead angles and/or lead directions with a high level of quality.

A method and a system for machining a work piece by a machining tool are provided. The method includes relatively moving the machining tool against the work piece to apply machining feeds therebetween. The contact points at the work piece are arranged on the area of the work piece to be machined, and the contact points at the machining tool form a curve on the machining tool surface. The system includes a manipulator, a machining tool and a controller being adapted for controlling the manipulator to operate the machining tool according to the method as above. With this solution, the system can generate wave paths of a machining tool, so as to extend the life of the tool and ensure the processing quality.

To enable simple identification of a workpiece with little effort during machining of a workpiece on a processing machine, a marking method is provided which is to be carried out via the processing machine. The method includes a) providing a tool on a rotatable tool holder of the processing machine, b) relative linear movement of the tool holder and the workpiece along a line on the surface of the workpiece, and c) controlling the distance of tool holder and workpiece during the linear movement, so that a pattern of markings is produced along the line by machining with the tool to form the identification mark on the surface of the workpiece. Furthermore, a readout method, a machining method and a processing machine configured for carrying the method are provided.

Provided is a control device for a machine tool that machines a workpiece by vibration-controlling a control shaft, wherein shaking of the machine tool as a whole is reliably suppressed. This control device for a machine tool includes: a vibration condition setting unit that sets a vibration condition including at least one of a frequency parameter comprising a vibration frequency or a vibration frequency multiple, an amplitude parameter comprising a vibration amplitude or a vibration amplitude multiple, and a vibration direction; a vibration upper limit setting unit that sets, in accordance with one or both of the vibration frequency and the vibration direction, an upper limit value of the vibration parameter that is determined by the vibration condition and includes at least one of the vibration frequency, the vibration amplitude, a vibration speed, a vibration acceleration, and a vibration jerk; a vibration condition limiting unit that limits, on the basis of the upper limit value of the vibration parameter, the vibration condition set by the vibration condition setting unit; and a vibration control unit that vibration-controls a control shaft on the basis of the vibration condition limited by the vibration condition limiting unit.

To provide a motor control device that prevents from becoming excessive correction, upon adding a backlash correction amount to a position command for a motor. Provided are: a positional error calculation part that calculates a positional error which is deviation between a converted first position detected value arrived at by converting a first position detected value which is the position of a movable part according to a rotation ratio between the movable part and the driven part, and a second position detected value which is the position of the driven part; and a position deviation calculation part that calculates a position deviation which is a difference between a position command and the second position detected value, in which the backlash correction part starts addition of the backlash correction amount when the variation of the positional error exceeds the first reference value, ends the addition of the backlash correction amount when the variation of the positional error exceeds the second reference value, and suspends the addition of the backlash correction amount when the position deviation becomes no more than the third reference value during correction.

Producing an object (2), comprising: providing a tool (10) having a mould surface (14); applying uncured composite material (12) to the mould surface (14) to form an assembly (8); curing the assembly (8) to produce cured composite material (12) having a surface (16) the same shape as the mould surface (14); providing a digital model (24) of the object (2) specifying a first surface (4) and a second surface (6) of the object (2), the first surface (4) being the same shape as the mould surface (14); and, while the cured composite material (12) is held against the mould surface (14), machining, using the digital model (24), a further surface (18) of the cured composite material (12) such that it has the same shape as the second surface (6) and the same position relative to the mould surface (14) as the second surface (6) relative to the first surface (4).

Producing an object (2), comprising: providing a tool (10) having a mould surface (14); applying uncured composite material (12) to the mould surface (14) to form an assembly (8); curing the assembly (8) to produce cured composite material (12) having a surface (16) the same shape as the mould surface (14); providing a digital model (24) of the object (2) specifying a first surface (4) and a second surface (6) of the object (2), the first surface (4) being the same shape as the mould surface (14); and, while the cured composite material (12) is held against the mould surface (14), machining, using the digital model (24), a further surface (18) of the cured composite material (12) such that it has the same shape as the second surface (6) and the same position relative to the mould surface (14) as the second surface (6) relative to the first surface (4).

A manufacturing machine is capable of additive manufacturing. The manufacturing machine includes: a connecting part configured to be connectable to a machine tool capable of subtractive manufacturing; and an additive manufacturing head configured to be positioned in a machining area of the machine tool and discharge a material, when the connecting part is connected to the machine tool. The manufacturing machine for additive manufacturing that can be installed at a low cost is thus provided.

A manufacturing machine is capable of additive manufacturing. The manufacturing machine includes: a connecting part configured to be connectable to a machine tool capable of subtractive manufacturing; and an additive manufacturing head configured to be positioned in a machining area of the machine tool and discharge a material, when the connecting part is connected to the machine tool. The manufacturing machine for additive manufacturing that can be installed at a low cost is thus provided.