A device for holding a workpiece that includes a first clamping element and at least one second clamping element, wherein the first clamping element and the second clamping element each include on an end side extending in a radial plane a first engagement structure and at least one second engagement structure at different radial positions configured to engage at a first time an end side of a first workpiece having a first diameter and at a second time an end surface of a second workpiece of a second diameter different than the first diameter for holding the workpiece by moving the first clamping element and the second clamping element in the radial direction.

The present invention is a novel machine for repairing damaged wheel rims whereby the machine is a combination CNC and manual lathe configured of performing all of the required tasks for repairing damaged wheel rims in a single unit.

A chuck device capable of efficiently changing a welding tip and nozzle. The chuck device includes a rotatable chuck base, an engagement part fixed to the chuck base so as to rotate integrally with the chuck base and can engage an engagement surface of the welding tip, the engagement part allowing the welding tip to rotate with the chuck base when the chuck base is rotated while engaged with the engagement surface, and a plurality of fingers provided to the chuck base to be openable and closable and can hold the welding tip and the nozzle, the plurality of fingers being capable of moving in directions approaching and separating from the engagement part.

Provided is a support device that supports an object to be supported, in a manner that allows the object to rotate, without rotation of the support device itself. The support device is provided with: a base part; pair of support members that are slidably provided with respect to the base part, and have arc-shaped cut-out portions which sandwich and hold a circumferential surface of an object to be supported, from both sides of the object; a plurality of first biasing members that bias the pair of support members in a direction toward each other; a plurality of bearing parts that are provided along the cut-out portions, and are for sandwiching and holding the object to be supported, in a manner that allows the object to rotate; and a plurality of second biasing members that bias the plurality of bearing parts in a direction toward the object to be supported. The plurality of first biasing members bias the pair of support members.

A rotary shaft clamp device configured to clamp a first member to a second member, the first and second members being relatively rotatable around a predetermined center axis, the rotary shaft clamp device including: a pair of contact surfaces annularly formed in an outer periphery of a disk provided for a rotary shaft that is a first member at a predetermined distance from the center axis and opposed to each other at a regular interval; and a press-contact member that is supported by a support body that is a second member and is configured to come into press-contact with the pair of contact surfaces, the press-contact member having a pair of surfaces located between the pair of contact surfaces to face the contact surfaces, the pair of surfaces being configured to advance in directions along the center axis.

The invention relates to a holding system (1) for temporarily holding a workpiece, comprising a holding apparatus (10) that has at least one or more existing holding units (11-14) for holding a workpiece with a retaining force of the particular holding unit (11-14), a detection means (20) that is designed to quantify a change in the retaining force of the existing holding units (11-14), and an adjustment means (30) that is designed to adapt the retaining force of a further holding unit (15) based on the quantified change.

Provided is a method for manufacturing a gripping tool for gripping a workpiece with top jaws (30) attached to a plurality of master jaws (20) attached to a gripping tool body (10). A first positioner (21, 24) that determines the distance of the top jaw from the center axis of the top jaw when the top jaw is attached to the master jaw is formed in a direction perpendicular to a slide direction in a surface of the master jaw. The method includes a step of attaching the plurality of master jaws to the gripping tool body, a step of gripping a shaping plug (70) by sliding the plurality of master jaws toward the center axis, and a step of finishing, in the surface of the master jaw, the first positioner extending in the direction perpendicular to the slide direction.

The present disclosure provides a jaw assembly for mounting to a lathe spindle. The jaw assembly comprises a first jaw set with at least one axially extending jaw portion which comprises a channel extending in the same axial direction as the jaw portion, and a second jaw set locatable within and releasably attached to the first jaw set via at least one fastener locatable in the channel.

There is disclosed a chuck jaw (10.1, 10.2, 10.3) for securing a workpiece (12) to a lathe chuck. The chuck jaw (10.1, 10.2, 10.3) includes a jaw body (16) adapted for operative mounting to the lathe chuck. The chuck jaw (10.1, 10.2, 10.3) further includes at least one holding element (18) operatively associated with the jaw body (16) and adapted to engage the workpiece (12). The at least one holding element (18) is moveable between (i) a release condition in which the holding element (18) is released from the workpiece (12), and (ii) an engaged position in which the holding element (18) engages a surface of the workpiece. The chuck jaw (10.1, 10.2, 10.3) further includes a clamping assembly (20) operatively adapted to secure the at least one holding element (18) in the engaged position.