A rotary table device according to the present invention includes: a spindle that supports a table; a driving mechanism that drives the spindle; a load detection portion that detects a load of the driving mechanism; a clamp mechanism that inhibits rotation of the spindle; a rotation control portion that causes the driving mechanism to drive the spindle with a predetermined inspection pattern after the clamp mechanism starts releasing clamping; and a determination portion that determines whether good or not with respect to an operation of the clamp mechanism based on of change over time in the load detected by the load detection portion when the spindle is driven with the inspection pattern.

A wire electrical discharge machine for performing electrical discharge machining on a workpiece by applying voltage across an electrode gap between a wire electrode stretched between an upper nozzle and a lower nozzle and the workpiece to generate electrical discharges, includes a lifting mechanism configured to move the workpiece in the travelling direction of the wire electrode.

A fixing device (1) for fixing workpieces, to fix substantially rod-shaped workpieces and workpieces to be machined by wire erosion or lasing, including a support apparatus (20) with a plurality of shaped elements (21) for accommodating and supporting a plurality of workpieces in the correspondingly formed shaped elements (21), and for positioning and fixing the workpieces in at least one translatory degree of freedom (22) in the shaped elements (21), wherein the fixing device (1) has a clamping apparatus (50) by means of which pressure force (52) can be applied to a plurality of workpieces accommodated in the shaped elements (21) so that the workpieces are fixed in the clamping apparatus (50) at least in a friction lock due to the applied pressure force, and wherein the support apparatus (20) as shaped elements (21) includes a plurality of passages (30) through which the workpieces can be guided.

An EDT apparatus 1 is disclosed, comprising a dielectric fluid return system for use with an EDT machine of the type in which the workpiece is not submersed in dielectric fluid. The return system comprises a first collector 19 for catching spills from a dielectric bath 9 associated with a set of electrodes 10 which apply electrical pulses to the workpiece through the dielectric fluid in the bath. Also, a separate, second collector 21 is positioned substantially beneath the workpiece and arranged both to receive fluid from the first collector 19 and to catch fluid that drips from the workpiece itself, the second collector being connected to a pump 13 which returns the fluid from the second collector to the dielectric bath.

A rotation table of the present invention includes a seal mechanism portion including a sealing material arranged between a casing and a face plate, a casing-side grooved portion for forming a casing-side seal mounting groove which is formed on an end of the casing and retains the sealing material, and a seal holding plate for holding the sealing material, wherein a portion having the casing-side grooved portion and the seal holding plate are configured to be separable.

An EDM machine includes a machine head, a wire guide, a machining wire extending from the wire guide to the machine head, a rotary table mounted to a first surface and a fixed table mounted to the rotary table, and a fixture mounted to the fixed table. The fixture includes a mounting portion substantially circumscribing the fixture. The mounting portion further includes a mounting surface. The mounting surface is closer to a first surface than an upper surface of the fixed table.

A WEDM machine tool for machining a disc-shaped porous part, comprises a workbench, a central stand column, a rotary device, a plurality of wire rack assemblies and a wire feeding mechanism comprising a bottom plate, a wire rack arranged on the bottom plate and a radial driving mechanism for driving the wire rack to move in a radial direction on the bottom plate; and the wire rack is a [-shaped rack with an opening oriented to the central stand column; and the wire feeding mechanism comprises a first guide wheel assembly arranged on the workbench to guide an electrode wire into and out of a wire winding barrel, second guide wheel assemblies arranged on the radial driving mechanism and the wire rack, a third guide wheel assembly arranged on the central stand column and a fourth guide wheel assembly arranged between two wire rack assemblies.

A wire electrical discharge machine includes: a wire electrode cumulative moving time calculator for calculating a value correlated to a wire electrode cumulative moving time as a cumulative value of time for which a wire electrode has moved in each of multiple wire electrode moving regions which are defined by dividing a movable range of the wire electrode moving relative to a worktable; and a display control unit for displaying on a display unit the information on values correlated to the wire electrode cumulative moving time for respective wire electrode moving regions.

Provided is a wire electric discharge machine in which workpiece attaching and detaching unit attaches and detaches a workpiece to and from workpiece fixing unit, machining-reference-part detecting unit detects the position of a machining reference part of the workpiece, workpiece-positioning executing unit positions the workpiece in a position where the workpiece does not collide with machining-reference-part measuring unit, measurement-positioning executing unit positions the machining-reference-part measuring unit in a predetermined measurement start position, the machining-reference-part measuring unit measures the position of the machining reference part of the workpiece, and machining-reference-part-measurement executing unit executes a position measuring operation for the machining reference part of the workpiece using the machining-reference-part measuring unit.

An electrostatic discharge machining fixture includes a fixture body, two or more electrically conductive face contacts seated in the fixture body, and two or more electrically resistive point contacts seated in the fixture body. The electrically conductive face contacts and the electrically resistive point contacts define a 3-2-1 alignment system to locate an additively manufactured article relative to the fixture body during an electrostatic discharge machining operation. Electrostatic discharge machining arrangements and methods of supporting additively manufactured workpieces during electrostatic discharge machining operations are also described.