Workpiece mounting and method for wire sawing

Abstract

A method and a device for cutting a workpiece in a wire saw is described, wherein a workpiece is fixed in a wire saw by means of a mounting beam. In the method according to the invention, the generation of a mark or a step on the cutting area along the cutting slit at the transition from the workpiece to the mounting beam is moved further to the edge of the cutting area or is avoided entirely. Therefor, the workpiece is held during the cutting operation in the wire saw by a mounting beam such that while one of the two piercing points lies on the surface of the workpiece and while simultaneously the other of the two piercing points lies on the surface of the mounting beam, the piercing point lying on the surface of the workpiece is the entry side piercing point.

1 . A mounting beam for use in a wire saw to hold a work piece comprising at least one cylindrically shaped portion, the mounting beam having a longitudinal axis (L) and
 a cross sectional area (A) in a plane perpendicular to the longitudinal axis (L) that is asymmetric with respect to a mirror plane that includes a feed direction of the wire saw, and the mounting beam further comprising a bearing surface for the work piece which has a configuration that is adapted to the cylindrical shape of the work piece.   
   
   
       2 . A mounting beam according to  claim 1 , wherein the mounting beam has essentially the form of a cuboid having a recess formed along the longitudinal axis (L) of the cuboid, wherein the recess forms the bearing surface. 
   
   
       3 . A mounting beam according to  claim 1 , wherein a surface of the mounting beam opposite to the bearing surface comprises a limit stop face for orientation in the wire saw. 
   
   
       4 . A mounting beam according to  claim 3 , wherein the cross sectional area (A) perpendicular to the longitudinal axis (L) of the mounting beam has two opposing lateral sides connecting the bearing surface and the limit stop face, wherein the two sides have different lengths. 
   
   
       5 . A wire saw for cutting a workpiece, comprising:
 a wire;   a feed device for producing a relative movement between the workpiece and the wire to perform a cutting of the workpiece, as the workpiece is moved through the wire along a feed direction;   a drive unit which moves the wire along its longitudinal axis during the cutting; and   a mounting beam according to  claim 1 , wherein the workpiece is attached to the mounting beam at a limit stop face in the wire saw.   
   
   
       6 . A wire saw according to  claim 5 , wherein the limit stop face is located at the feed device. 
   
   
       7 . A wire saw for cutting a workpiece, comprising:
 a wire;   a feed device for producing a relative movement between the workpiece and the wire to perform a cutting of the workpiece, as the workpiece is moved through the wire along a feed direction;   a drive unit which moves the wire along its longitudinal axis during the cutting; and   a mounting beam for attaching the workpiece in the wire saw, wherein in the mounted state the workpiece is held in the wire saw by the mounting beam in such a manner that the contact surface between the mounting beam and the workpiece lies pre-dominantly on the side of a plane that contains the longitudinal axis (M) of the workpiece and that is perpendicular to the longitudinal axis of a section of the wire, relative to which the workpiece is moved to perform cutting.   
   
   
       8 . A wire saw for cutting a workpiece that has at least one cylindrically shaped portion, comprising:
 a wire;   a feed device for producing a relative movement between the workpiece and the wire to perform a cutting of the workpiece, as the workpiece is moved through the wire along a feed direction;   a drive unit which moves the wire along its longitudinal axis during the cutting; and   a mounting beam comprising a bearing surface for the workpiece which is adapted to the cylindrical shape of the workpiece,   wherein the workpiece is attached to the mounting beam at a limit stop face in the wire saw, and a plane (E) defined by the limit stop face is inclined at an angle α with respect to the longitudinal axis of a section of the wire, relative to which the workpiece is moved to perform cutting.