The purpose of the present invention is to both break down chips and suppress sympathetic vibration in a machine. This work machine control device superposes a swinging command for commanding relative swinging between a workpiece and a cutting tool onto a movement command for commanding relative movement between the workpiece and the cutting tool, thereby generating air cuts in chips from the workpiece to break down the chips. A position information acquisition unit of the work machine control device acquires position information related to the relative positions of the workpiece and the tool. A state assessment unit of the work machine control device assesses that a state of instability is in effect, under the condition that a positional deviation exceeds a threshold value, the positional deviation increasing with increases in the difference between actual relative positions that are based on the position information and command relative positions that are based on the movement command and the swinging command. A swinging switching unit of the work machine control device performs a switching process for switching a swinging condition in relative swinging, under the condition that it is assessed that the state of instability is in effect.

The present invention discloses an extended boring bar connecting apparatus based on zero-point positioning mechanisms. A side surface of a power spindle box assembly is used as a connection base surface of a boring bar seat assembly, and an extended boring bar assembly is clamped in inner holes of hydraulic expansion sleeves of the boring bar seat assembly, and is also connected to a power spindle tool interface in the power spindle box assembly. A boring bar seat is locked to the side surface of the power spindle box assembly through zero-point positioning mechanisms. Two hydraulic expansion sleeves are arranged in an inner hole of the boring bar seat, and have dimensions corresponding to the diameter of an excircle where a boring bar is clamped. A tool holder interface flange of the boring bar assemblies is locked to the power spindle box assembly.

A cutting tool comprises a holder, a cutting insert, a sensor and a wiring member. The holder has a rod shape and comprises a front end surface, an upper surface, a lower surface, a first side surface, a second side surface and a pocket. A cutting insert is located in the pocket and comprises a cutting edge. The sensor is located on the outer surface on the side of the front end of the holder. The wiring member is electrically connected to the sensor and extends from the side of the sensor toward the rear end of the holder. The holder includes a groove that is open to both the lower surface and the second side surface and extends from the side of the front end toward the rear end. The wiring member is located in the groove.

A cutting tool comprises a holder, a cutting insert, a sensor and a wiring member. The holder has a rod shape and comprises a front end surface, an upper surface, a lower surface, a first side surface, a second side surface and a pocket. A cutting insert is located in the pocket and comprises a cutting edge. The sensor is located on the outer surface on the side of the front end of the holder. The wiring member is electrically connected to the sensor and extends from the side of the sensor toward the rear end of the holder. The holder includes a groove that is open to both the lower surface and the second side surface and extends from the side of the front end toward the rear end. The wiring member is located in the groove.

To provide a head capable of preventing complications of work procedures and increase in work hours to improve productivity by configuring a head-replaceable cutting tool for machining a workpiece. A cutting tool is a head-replaceable cutting tool having a shank and machining a workpiece, wherein a head comprises a mounting portion mounted to the shank, and a mounting hole to which a substantially rod-shaped cutting member is mounted. A central axis of the mounting hole is orthogonal to a fastening direction in which the head is fastened to the shank.

To provide a head capable of preventing complications of work procedures and increase in work hours to improve productivity by configuring a head-replaceable cutting tool for machining a workpiece. A cutting tool is a head-replaceable cutting tool having a shank and machining a workpiece, wherein a head comprises a mounting portion mounted to the shank, and a mounting hole to which a substantially rod-shaped cutting member is mounted. A central axis of the mounting hole is orthogonal to a fastening direction in which the head is fastened to the shank.

A cutting tool includes a shaft, and a sensor device disposed in such a manner as to surround a portion of the shaft. The sensor device includes a sensor module including first sensors, a substrate connected to the first sensors, and a wireless communication unit connected to the substrate and configured to transmit a signal including information detected by the first sensors to outside and a housing accommodating the sensor module. A region of the shaft surrounded by the sensor device includes a first region having a shape of a 4n-sided polygon when viewed from a direction in which the rotation axis extends. The plurality of first sensors are arranged on at least two of outer peripheral surfaces of the first region, perpendicular lines of the outer peripheral surfaces passing through the rotation axis and intersecting at 90 degrees.

A cutting tool includes a shaft, and a sensor device disposed in such a manner as to surround a portion of the shaft. The sensor device includes a sensor module including first sensors, a substrate connected to the first sensors, and a wireless communication unit connected to the substrate and configured to transmit a signal including information detected by the first sensors to outside and a housing accommodating the sensor module. A region of the shaft surrounded by the sensor device includes a first region having a shape of a 4n-sided polygon when viewed from a direction in which the rotation axis extends. The plurality of first sensors are arranged on at least two of outer peripheral surfaces of the first region, perpendicular lines of the outer peripheral surfaces passing through the rotation axis and intersecting at 90 degrees.

A machining device (1) comprising a housing (2), a spindle (4) comprising at least one bearing, a pulse shaft (11), an amplitude disc (8) coupled to the pulse shaft (11) and arranged concentric to it, the pulse shaft (11) defining an axial direction (AD), the amplitude disc (8) further comprising at least one recess (20), in which a sled (24) is arranged. The sled (24) has an irregularity (28), which comprises a concave part as seen in a plane defined by the amplitude disc (8). The machining device (1) further comprising at least one first elastic element (12a), a first motion link (14a) and a first embedding disc (10a) comprising at least one contact element (26), the first embedding disc (10a) being arranged concentric to the amplitude disc (8) and the spindle (4) being coupled to the first embedding disc (10a), the first motion link (14a) being connected to the housing (2) and the first embedding disc (10a). The at least one first elastic element (12a) abutting the housing (2) with one end and the first embedding disc (10a) and/or the first motion link (14a) with the other end for pre-tensioning the first embedding disc (10a) towards the amplitude disc (8), whereby the contact element (26) of the first embedding disc (10a) is abutting the amplitude disc (8) and the irregularity (28) at least once per turn when the machining device is in use, so that a relative rotation between the amplitude disc (8) and the first embedding disc (10a) results in vibration in the spindle (4).