Oscillation for a direct distance between the centers of a tool T and a workpiece W to meet l+a×l×(1−cos(Mωt)) and vertical oscillation to meet a×l×sin(Mωt) are applied alone or in combination with time t, where ω denotes an angular velocity of a workpiece, M denotes the number of sides of a polygon, and a denotes an adjustment parameter. Such oscillation enables adjustment as to how the machining surface is made concave or convex.

Oscillation for a direct distance between the centers of a tool T and a workpiece W to meet l+a×l×(1−cos(Mωt)) and vertical oscillation to meet a×l×sin(Mωt) are applied alone or in combination with time t, where ω denotes an angular velocity of a workpiece, M denotes the number of sides of a polygon, and a denotes an adjustment parameter. Such oscillation enables adjustment as to how the machining surface is made concave or convex.

A drilling machine and a drilling method including drilling a first bore in a material with a drilling machine by applying a torque to a drilling tool for imparting a rotation at a first rotational speed to the drilling tool, and applying a thrust to the drilling tool for advancing the drilling tool at a first feed speed into the material, wherein a drilling parameter is measured while drilling the first bore, and a second rotational speed and a second feed speed are determined based on the drilling parameter, then drilling a second bore at the second rotational speed and at the second feed speed.

Provided is a machine tool control device capable of promptly determining a frequency parameter and an amplitude parameter for a desired oscillation instruction enabling shredding of a chip. A machine tool control device 1 performs machining while causing a tool T and a workpiece W to oscillate relative to each other. The machine tool control device 1 is provided with an oscillation instruction calculation unit 113 that calculates an instruction for an oscillating operation; a first oscillation condition determination unit 111 that determines, as a first oscillation condition, one of a frequency parameter constituted of a frequency or a frequency multiplying factor of the oscillation instruction, and an amplitude parameter constituted of an amplitude or an amplitude multiplying factor of the oscillation instruction; and a second oscillation condition calculation unit 112 that calculates, as a second oscillation condition, the other of the frequency parameter and the amplitude parameter on the basis of the first oscillation condition determined by the first oscillation condition determination unit 111.

Provided is a machine tool control device capable of promptly determining a frequency parameter and an amplitude parameter for a desired oscillation instruction enabling shredding of a chip. A machine tool control device 1 performs machining while causing a tool T and a workpiece W to oscillate relative to each other. The machine tool control device 1 is provided with an oscillation instruction calculation unit 113 that calculates an instruction for an oscillating operation; a first oscillation condition determination unit 111 that determines, as a first oscillation condition, one of a frequency parameter constituted of a frequency or a frequency multiplying factor of the oscillation instruction, and an amplitude parameter constituted of an amplitude or an amplitude multiplying factor of the oscillation instruction; and a second oscillation condition calculation unit 112 that calculates, as a second oscillation condition, the other of the frequency parameter and the amplitude parameter on the basis of the first oscillation condition determined by the first oscillation condition determination unit 111.

The control device includes a brazing controller configured to control a brazing material moving mechanism so as to retract a tip of a brazing material from a heating position to interrupt the brazing, during execution of the brazing, and a movement controller configured to, when the brazing is interrupted, control a movement machine so as to retract a heating device or a base material in a direction opposite to a movement direction during the execution of the brazing, and subsequently advance the heating device or the base material in the movement direction again. The brazing controller resumes the brazing by controlling the brazing material moving mechanism so as to cause the tip of the brazing material to reach the heating position at the same time when the heating device or the base material advanced by the movement controller reaches an interruption position at which the brazing is interrupted.

The control device includes a brazing controller configured to control a brazing material moving mechanism so as to retract a tip of a brazing material from a heating position to interrupt the brazing, during execution of the brazing, and a movement controller configured to, when the brazing is interrupted, control a movement machine so as to retract a heating device or a base material in a direction opposite to a movement direction during the execution of the brazing, and subsequently advance the heating device or the base material in the movement direction again. The brazing controller resumes the brazing by controlling the brazing material moving mechanism so as to cause the tip of the brazing material to reach the heating position at the same time when the heating device or the base material advanced by the movement controller reaches an interruption position at which the brazing is interrupted.

A method for machining a workpiece with at least one tool, wherein the workpiece and/or the tool are driven in rotation, wherein the tool has at least one cutting edge that is brought into cutting engagement with the workpiece, namely into a cutting position, in a cutting operation, and wherein, in the cutting operation, the workpiece or the tool is moved in a feed direction with a constant feed, and wherein, in a surface machining operation, the tool and thus the cutting edge remain in the cutting position and the workpiece or the tool is moved in the feed direction, shifted by half the feed.

A method for machining a workpiece with at least one tool, wherein the workpiece and/or the tool are driven in rotation, wherein the tool has at least one cutting edge that is brought into cutting engagement with the workpiece, namely into a cutting position, in a cutting operation, and wherein, in the cutting operation, the workpiece or the tool is moved in a feed direction with a constant feed, and wherein, in a surface machining operation, the tool and thus the cutting edge remain in the cutting position and the workpiece or the tool is moved in the feed direction, shifted by half the feed.

Embodiments of an electric linear actuator may include a roller screw assembly, an electric motor coupled to the roller screw assembly, and a linear transducer operatively coupled with the roller screw assembly. The motor may be configured to drive the roller screw assembly to extend and retract another component, such as a rod. In some embodiments, the linear transducer may be configured to detect a position of the rod. The roller screw assembly may be coupled directly to the motor via a gear coupling, with the motor disposed generally in axial alignment with the roller screw assembly. Other embodiments disclosed herein include a veneer lathe carriage with electric linear actuators and corresponding apparatuses, methods, and systems.