Provided is a machine tool control device that can generate movement commands of any required command form and that can also suppress the deviation of a peak position during air cutting. A machine tool control device 1 that performs processing while making a tool and a workpiece oscillate relative to each other. The machine tool control device 1 comprises an oscillation conditions setting unit 11 that sets oscillation conditions, an oscillation phase division unit 12 that divides an oscillation phase into a plurality of segments, a layered command calculation unit 13 that, for each of the divided segments, calculates a layered command as a movement command on the basis of the oscillation conditions, and a position and speed control unit 17 that makes the tool and the workpiece oscillate relative to each other on the basis of the layered commands.

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 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).