Abstract: A machine tool includes a bed that includes a guide unit, a first structure and a second structure that are each mounted over the bed, a first drive unit that moves the first structure along the guide unit, and a protector that covers at least part of the first drive unit. The protector is extendable and retractable with movement of the first structure, at least one of the first structure and the second structure includes a protector housing portion that houses at least part of the protector, and the protector housing portion is a space that is provided in a base portion of at least one of the first structure and the second structure and opened in a movement direction of the first structure. Accordingly, structures such as a headstock and a tool post can easily approach each other and the convenience of machining a workpiece by a machine tool can be increased.

Abstract: A manufacturing machine is capable of subtractive manufacturing and additive manufacturing for a workpiece. The manufacturing machine includes: a first headstock and a second headstock disposed in a machining area and configured to hold a workpiece; a tool spindle and a lower tool rest disposed in the machining area and configured to hold a tool to be used for subtractive manufacturing for the workpiece; an additive manufacturing head configured to discharge a material during additive manufacturing for the workpiece; a workpiece gripper configured to grip the workpiece during transportation of the workpiece into and out of the machining area; and a robot arm on which the additive manufacturing head and the workpiece gripper are mountable. Accordingly, the manufacturing machine improving the productivity in the simple and easy manner is provided.

Abstract: A workpiece processing method is a method for successively processing a plurality of workpieces including a first workpiece and a second workpiece in a single machining area. The workpiece processing method includes: performing additive manufacturing on the second workpiece in the machining area; and performing subtractive manufacturing on the first workpiece in the machining area while keeping on standby the second workpiece on which additive manufacturing is performed. In this way, the workpiece processing method with improved productivity is provided.

Abstract: 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.

Abstract: A manufacturing machine includes: a tool spindle configured to hold a tool for subtractive manufacturing for a workpiece; an additive manufacturing head detachably mounted on the tool spindle to discharge material powder and emit a laser beam during additive manufacturing; and a head stocker storing the additive manufacturing head in an outside-of-machining-area. The additive manufacturing head includes: a head body into which a laser beam is introduced; and a laser tool detachably mounted on the head body to emit the laser beam and define a laser-beam-irradiated region on the workpiece. The manufacturing machine further includes: a laser tool stocker storing a plurality of laser tools; and a laser tool exchanger for exchanging laser tools between the head body and the laser tool stocker. A high productivity of additive manufacturing is achieved by using the above features configured in this way.

Abstract: A machine tool includes a cover body for separating at least a machining area from the outside. The cover body has an opening for allowing the machining area to communicate with the outside and includes a door for opening and closing the opening. The cover body does not include a transparent window for allowing the machining area to be visually checked from the outside. The cover body can be formed to be of a sufficient strength throughout and, if an unexpected accident occurs, structures within the machining area can be reliably prevented from being shot out of the machining area.

Abstract: A manufacturing machine is capable of subtractive manufacturing and additive manufacturing for a workpiece. The manufacturing machine includes: a first headstock and a second headstock disposed in a first processing area and configured to hold a workpiece; a lower tool rest and a tool spindle disposed in the first processing area and configured to hold a tool to be used for subtractive manufacturing for the workpiece; an additive manufacturing head disposed in a second processing area; and a robot arm configured to hold a workpiece and transport the workpiece between the first processing area and the second processing area. The additive manufacturing head is configured to discharge a material toward the workpiece held by the robot arm during additive manufacturing for the workpiece. Accordingly, the manufacturing machine configured simply to be capable of subtractive manufacturing and additive manufacturing is provided.

Abstract: A manufacturing machine includes: a tool spindle configured to hold a tool for subtractive manufacturing for a workpiece; an additive manufacturing head detachably mounted on the tool spindle to discharge material powder and emit a laser beam during additive manufacturing; and a head stocker storing the additive manufacturing head in an outside-of-machining-area. The additive manufacturing head includes: a head body into which a laser beam is introduced; and a laser tool detachably mounted on the head body to emit the laser beam and define a laser-beam-irradiated region on the workpiece. The manufacturing machine further includes: a laser tool stocker storing a plurality of laser tools; and a laser tool exchanger for exchanging laser tools between the head body and the laser tool stocker. A high productivity of additive manufacturing is achieved by using the above features configured in this way.

Abstract: A manufacturing machine is capable of subtractive manufacturing and additive manufacturing for a workpiece. The manufacturing machine includes: a first headstock and a second headstock disposed in a first processing area and configured to hold a workpiece; a lower tool rest and a tool spindle disposed in the first processing area and configured to hold a tool to be used for subtractive manufacturing for the workpiece; an additive manufacturing head disposed in a second processing area; and a robot arm configured to hold a workpiece and transport the workpiece between the first processing area and the second processing area. The additive manufacturing head is configured to discharge a material toward the workpiece held by the robot arm during additive manufacturing for the workpiece. Accordingly, the manufacturing machine configured simply to be capable of subtractive manufacturing and additive manufacturing is provided.

Abstract: 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.

Abstract: A manufacturing machine is capable of subtractive manufacturing and additive manufacturing for a workpiece. The manufacturing machine includes: a first headstock and a second headstock disposed in a machining area and configured to hold a workpiece; a tool spindle and a lower tool rest disposed in the machining area and configured to hold a tool to be used for subtractive manufacturing for the workpiece: an additive manufacturing head configured to discharge a material during additive manufacturing for the workpiece a workpiece gripper configured to grip the workpiece during transportation of the workpiece into and out of the machining area; and a robot arm on which the additive manufacturing head and the workpiece gripper are mountable. Accordingly, the manufacturing machine improving the productivity in the simple and easy manner is provided.

Abstract: A workpiece processing method is a method for successively processing a plurality of workpieces including a first workpiece and a second workpiece in a single machining area. The workpiece processing method includes: performing additive manufacturing on the second workpiece in the machining area; and performing subtractive manufacturing on the first workpiece in the machining area while keeping on standby the second workpiece on which additive manufacturing is performed. In this way, the workpiece processing method with improved productivity is provided.

Abstract: There is provided a method of compensating a command value for rotation angle capable of precisely compensating a command value for rotation angle even when conditions at detection differ to thereby make error patterns different in the case where a tooth-to-tooth period error pattern in an arbitrary tooth period is used for all the tooth periods to correct a command value for rotation angle. A forward direction tooth-to-tooth period error pattern being an error pattern of detected rotation angles at forward rotation and the actual rotation angles and a backward direction tooth-to-tooth period error pattern being an error pattern at backward rotation are found, and the command value for rotation angle is corrected based on the error pattern at the time of forward rotation, and the command value for rotation angle is corrected based on the error pattern at the time of backward rotation.

Abstract: A machine tool includes a cover body for separating at least a machining area from the outside. The cover body has an opening for allowing the machining area to communicate with the outside and includes a door for opening and closing the opening. The cover body does not include a transparent window for allowing the machining area to be visually checked from the outside. The cover body can be formed to be of a sufficient strength throughout and, if an unexpected accident occurs, structures within the machining area can be reliably prevented from being shot out of the machining area.

Abstract: A machine tool 1 has a support body 11, moving bodies 12, 13, 14, 15 with an engagement member 12a having an engagement hole 12b, a guide mechanism 20 for guiding the movement of the moving bodies 12, 13, 14, 15, a guide rail 31 provided along the moving direction of the moving bodies 12, 13, 14, 15 on the support body 11, a moving member 32 having a moving member body 33 engaged with the guide rail 31 and an engagement shaft 34 provided on the moving member body 33 and engaged with the engagement hole 12b and a collar member 35 provided on the tip portion of the engagement shaft 34, and a compressing spring 38 in which the engagement shaft 34 is inserted and which energizes the engagement member 12a. The engagement member 12a is provided on the opposite side to the moving body 14.

Abstract: There is provided a method of compensating a command value for rotation angle capable of precisely compensating a command value for rotation angle even when conditions at detection differ to thereby make error patterns different in the case where a tooth-to-tooth period error pattern in an arbitrary tooth period is used for all the tooth periods to correct a command value for rotation angle.

Abstract: A machine tool capable of eliminating a laborious attachment/detachment work of a cover member is provided. The machine tool includes a door device 5 having a first door 6 to cover a machining-area opening 3e when machining a workpiece and a second door 7 to cover the machining-area opening 3e when not machining the workpiece and formed to be visible an inside thereof, in which the first door 6 and the second door 7 are arranged in a movable manner between a position-in-use covering the machining-area opening 3e and a position when opened opening the machining-area opening 3e.

Abstract: A workpiece centering apparatus 1 is provided on a lathe having a spindle 33, an independent chuck 34, and upper and lower tool rests 37, 41, and has sandwiching members 11, 12 mounted to the tool rests 37, 41, respectively, and capable of contacting the outer peripheral surface of a workpiece W, and a centering control section 15 for moving the tool rests 37, 41 and thereby moving the sandwiching members 11, 12 to their respective centering positions which are the positions of the sandwiching members 11, 12 when the center position of a portion to be machined of the workpiece W coincides with the axis of the spindle 33 in a state where the portion to be machined of the workpiece W is being sandwiched and held by the sandwiching members 11, 12, and then causing the independent chuck 34 to grip the workpiece W.

Abstract: A machine tool 1 has a support body 11, moving bodies 12, 13, 14, 15 with an engagement member 12a having an engagement hole 12b, a guide mechanism 20 for guiding the movement of the moving bodies 12, 13, 14, 15, a guide rail 31 provided along the moving direction of the moving bodies 12, 13, 14, 15 on the support body 11, a moving member 32 having a moving member body 33 engaged with the guide rail 31 and an engagement shaft 34 provided on the moving member body 33 and engaged with the engagement hole 12b and a collar member 35 provided on the tip portion of the engagement shaft 34, and a compressing spring 38 in which the engagement shaft 34 is inserted and which energizes the engagement member 12a. The engagement member 12a is provided on the opposite side to the moving body 14.

Abstract: A workpiece centering apparatus 1 is provided on a lathe having a spindle 33, an independent chuck 34, and upper and lower tool rests 37, 41, and has sandwiching members 11, 12 mounted to the tool rests 37, 41, respectively, and capable of contacting the outer peripheral surface of a workpiece W, and a centering control section 15 for moving the tool rests 37, 41 and thereby moving the sandwiching members 11, 12 to their respective centering positions which are the positions of the sandwiching members 11, 12 when the center position of a portion to be machined of the workpiece W coincides with the axis of the spindle 33 in a state where the portion to be machined of the workpiece W is being sandwiched and held by the sandwiching members 11, 12, and then causing the independent chuck 34 to grip the workpiece W.