An apparatus for clamping a work piece is provided. The apparatus includes a base plate to support the work piece; at least one clamp body fixed to the base plate; at least one fastener fixing the at least one clamp body to the base plate; and a protruding piece having at least a portion thereof inserted into the clamp body and an end thereof extending from a lateral face of the clamp body, the protruding piece including a hollow point tip at the opposite end, where outer and inner lateral surfaces of the hollow point tip join to define a circular sharp edge at the opposite end of the protruding piece.

A dental blank holder for the manufacture of dental articles. The dental blank holder can include a frame configured to cooperate with a blank holder of a dental mill. The frame can includes an inner periphery and an outer periphery, the inner periphery including a plurality of receiving walls forming receiving spaces, each receiving space configured to receive a dental blank. The dental blank holder may also include a movable arm configured to form a plurality of locking walls, each locking wall configured to enclose a corresponding receiving space, the movable arm including at least one biasing member configured to apply an individual force toward each receiving space such that each of the dental blanks is held in the receiving spaces for a milling process.

A fixture for supporting a workpiece during a machining operation is disclosed. The fixture may include a seat configured to receive the workpiece. The fixture may further include a quick release lever mounted to the fixture and configured to displace the workpiece from the seat.

An axially elongate dental machining portion includes a machining region machinable by a dental machining device, and a fixing region for fixing the axially elongate dental machining portion to a holder of the dental machining device. In the fixing region is a fixing projection oriented transversely relative to a longitudinal axis. In a condition of the machining portion being mounted in the holder, the fixing projection bears against a holding nose positioned in complementary relationship on the holder. The machining region has a machinable surface which has a maximum spacing relative to the longitudinal axis, measured normal to the longitudinal axis, and the fixing projection has a maximum spacing relative to the longitudinal axis, measured normal relative to the longitudinal axis, that is greater than the maximum spacing of the machinable surface relative to the longitudinal axis.

A method and apparatus for processing workpieces to form parts. Tools associated with a multi-spindle machine may be positioned with respect to a plurality of workpieces on a fixture comprising a plurality of platforms and an adjustment system. Each platform may be individually moveable with respect to others in the plurality of platforms about a number of axes. The plurality of platforms may be configured to hold the plurality of workpieces in which each platform may be configured to hold a workpiece in the plurality of workpieces during operations performed by the multi-spindle machine. The adjustment system may be configured to move each of the plurality of platforms about the number of axes independently from the others in the plurality of platforms. The operations may be performed on the plurality of workpieces using the multi-spindle machine and the fixture to form a plurality of parts.

A machine tool for machining workpieces, wherein the machine tool has at least one first spindle assembly with at least one working spindle on which a machining tool for workpiece machining is arrangeable, wherein the machine tool has a workpiece holding device for holding workpieces for the purpose of workpiece machining by way of the machining tool, wherein the machine tool has a guide arrangement for the relative positioning of the workpiece holding device holding the workpieces and the first spindle assembly for workpiece machining, wherein the guide arrangement comprises a workpiece-holder guide for guiding the workpiece holding device so as to position a workpiece holder holding the workpieces relative to the first spindle assembly.

A workpiece clamping device able to clamp a first workpiece and a second workpiece placed on the first workpiece. The workpiece clamping device includes a receiving base on which the first workpiece is to be placed, a first clamping mechanism for clamping the first workpiece, and a second clamping mechanism for clamping a second workpiece placed on the first workpiece. The first clamping mechanism has a first clamp section and a second clamp section, which are provided on the receiving base so as to open and close. The second clamping mechanism has a third clamp section and a fourth clamp section, which are provided on the receiving base so as to open and close, to retain the second workpiece at a predetermined position with respect to the first workpiece.

A key clamping device includes a first key clamp, a second key clamp and a rotational device connected to the first and second key clamps. The rotational device may facilitate rotation of the first and second key clamps.

Disclosed is a steering knuckle drilling device, including a drilling machine, a bottom plate, guide rails, hydraulic cylinders, fixtures, a support post and a support block. When in use, the present invention can simultaneously drill the left and right symmetric workpieces of a steering knuckle and can conveniently install and dismount the workpieces.

Manufacturing spectacle lenses using lens blanks blocked onto holding elements is laborious and time-consuming. Furthermore the manufacture is rendered difficult by different surface curvatures on the receiving side of the lens blanks. The purpose of the invention is to remedy such drawbacks. Accordingly this invention relates to equipment for processing lens blanks comprising a workpiece turret supported rotatably about a main axis of rotation, said turret being fitted with at least two workpiece receptacles configured each outside the main axis of rotation and being rotatable about spindle axes, each workpiece receptacle comprising a workpiece receiving surface having a surface curvature rotationally symmetrical about the spindle axis, whereby said surface curvatures of the workpiece receiving surfaces being different from each other.