A complex machine tool for cylindrical workpieces has a bed, a headstock assembly, at least one supporting assembly, and at least one machining assembly. The bed has three tracks being respectively a first track, a second track, a third track arranged in order. Each one of the three tracks defines a respective guiding direction, and the three guiding directions of the three tracks are mutually parallel. The headstock assembly is connected to the bed, and is located near one of two ends of the second track. The at least one supporting assembly is mounted on one of the three tracks and is used for supporting the cylindrical workpiece. The at least one machining assembly is mounted on one of the three tracks, is slidable along the track, and is located on a position at a spaced interval from the at least one supporting assembly.

A complex machine tool for cylindrical workpieces has a bed, a headstock assembly, at least one supporting assembly, and at least one machining assembly. The bed has three tracks being respectively a first track, a second track, a third track arranged in order. Each one of the three tracks defines a respective guiding direction, and the three guiding directions of the three tracks are mutually parallel. The headstock assembly is connected to the bed, and is located near one of two ends of the second track. The at least one supporting assembly is mounted on one of the three tracks and is used for supporting the cylindrical workpiece. The at least one machining assembly is mounted on one of the three tracks, is slidable along the track, and is located on a position at a spaced interval from the at least one supporting assembly.

The invention relates to a machine assembly 100 for use in a manufacturing machine 1000, in particular in a horizontal orientation of an axis of rotation D in a horizontal manufacturing machine, comprising a workpiece fixture 30 which is mounted on a fixture carrier 4 and has a first side 31 and a second side 32, and a first and a second tool holding fixture 10, 20, wherein the first tool holding fixture 10 is arranged on the first side 31 of the workpiece fixture 30 and the second tool holding fixture 20 is arranged on the second side 32 of the workpiece fixture 30. According to the invention it is provided that the workpiece fixture 30 has a main spindle 33 with an axis of rotation D running from the first to the second side 31, 32, and the main spindle 33 is designed for holding a workpiece along the axis of rotation D.

An adjustable lathe mounting system for turning a work piece on a rotating lathe having a lathe bed, headstock, and a headstock spindle, where the work piece is attached to the headstock spindle. The lathe mounting system includes an adjustable base releasably attached to the slotted way of the bed via a locking plate and a pair of laterally adjustable way spacers moveable within a laterally extending slot that engage each side of the slotted way.

In a steady rest (1) for centring a rotationally symmetrical workpiece (2) in the space, consisting of: two housing halves (4, 5) arranged at a distance from one another and firmly connected together, a middle steady rest arm (6) arranged between the two housing shells (4, 5) that is mounted in the housing shells (4, 5) by means of an actuation piston (7) so as to be moved in an axial direction (3) towards the workpiece (2), and two outer steady rest arms (11, 12) that are in a driving connection with the middle steady rest arm (6) by means of a guide slide (13) which has a control track (14) on two opposite outside sides, on which a roller (16) attached to the free ends (15) of both outer steady rests (11, 12) is arranged which roll along the control track (14), workpieces (2) with different diameters should be held in the space. This is achieved in that the particular control track (14) of the guide slide (13) has at least two control sections (21, 22, 25) and that at least two rollers (16) spaced apart from one another are provided on the particular outer steady rest arm (11, 12), which are in an active contact with one each of the control sections (21, 22, 25) depending on the position of the guide slide (13) in the housing shells (4, 5).

An automatic method for changing the machining reference frame on a machine for machining parts from bars, notably extruded or molded profile sections, the part to be machined being held during its machining by at least two distinct and independent clamping means each having a longitudinal movement and a rotation on an axis parallel to the long axis of the part to be machined allowing for a relative angular and longitudinal displacement of one relative to the other, a method whereby, in order to proceed with a change of reference frame, one of the clamping means releases the part to be machined and disengages therefrom to turn freely about the long axis of the part independently of the other clamping means, then aligns itself angularly on new clamping references of the part before retaking the latter and allowing for a change of grip by the other clamping means.

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.

A cutting apparatus, for cutting a material, comprising a chuck for holding and rotating material, wherein the chuck can rotate about an axis of rotation and can be movable along the axis of rotation. The cutting apparatus further comprises a cutting element for cutting a material, and a first plurality of rotating elements for supporting the material during cutting operations. The cutting element can be movable vertically for positioning the cutting element adjacent to the material to be cut, and the first plurality of rotating elements can be movable vertically to align with the material. A method for cutting a material comprises the steps of positioning the material on a plurality of rotating members, moving the plurality of rotating members vertically, gripping the material with the chuck, rotating the chuck to rotate the material, and cutting the material with a cutter.

An adjustable lathe mounting system for turning a work piece on a rotating lathe having a lathe bed, headstock, and a headstock spindle, where the work piece is attached to the headstock spindle. The lathe mounting system includes an adjustable base releasably attached to the slotted way of the bed via a locking plate and a pair of laterally adjustable way spacers moveable within a laterally extending slot that engage each side of the slotted way.

A work piece support rest is provided for turning a work piece on a rotating lathe having a lathe bed, headstock, and a headstock spindle, where the work piece is attached to the headstock spindle. The support rest includes an adjustable base releasably attached to the slotted way of the bed via a locking plate and a pair of laterally adjustable way spacers moveable within a laterally extending slot that engage each side of the slotted way. A multi-piece outer ring is releasably attached to the adjustable base. A plurality of roller slides are releasably and adjustably attached to the outer ring, such that each of the roller slides extends radially inwardly and has a roller disposed at an inward distal end thereof for supporting the work piece.