The invention relates to a method for separating a plurality of slices from workpieces (4) by means of a wire saw, wherein a wire grating (2) is tensioned in a plane between two wire-guiding rollers (1), wherein each of the two wire-guiding rollers (1) is mounted between a fixed bearing (5) and a floating bearing (6). The method involves delivering the workpiece (4) via the wire grating (2) by controlling the temperature of the workpiece (4) by wetting the workpiece (4) with a cooling medium, while simultaneously axially shifting the floating bearing (6) by controlling the temperature of the fixed bearing (5) with a cooling fluid according to the specification of a first temperature profile, and while simultaneously shifting the workpiece (4) along the workpiece axis by means of a control element (15) according to the specification of a second correction profile.

Slices are cut from workpieces using a wire saw having a wire array tensioned in a plane between two wire guide rollers each supported between fixed and floating bearings and comprising a chamber and a shell enclosing a core and having guide grooves for wires. During a cut-off operation, a workpiece is fed through the wire array perpendicular to a workpiece axis and the wire array plane. The workpiece is fed through the wire array while simultaneously: changing shell lengths by adjusting chamber temperatures in dependence on a depth of cut and a first correction profile; and moving the workpiece along the workpiece axis in accordance with a second correction profile. The correction profiles are opposed to a shape deviation.

A method uses a wire saw to cut slices from a workpiece. The wire saw has an array of saw wire tensioned in a plane between two rollers supported between fixed and floating bearings. During a cut-off operation, the workpiece is fed through the wire array with simultaneous axial movement of the floating bearings by adjusting the temperature of the fixed bearings with a cooling fluid in accordance with the temperature of the cooling fluid being in dependence on a depth of cut and correlating with a first correction profile, which specifies the travel of the floating bearings in dependence on the depth of cut. Also, the workpiece is fed through the wire array while simultaneously moving the workpiece along the workpiece axis in accordance with a second correction profile, specifying the travel of the workpiece. The first and second correction profiles are opposed to a shape deviation.

A device for cutting a plate or panel of porous construction material includes a movement structure that moves the plate or panel and includes at least one conveyor, and which is able to move in a direction (X). The device also includes a wire to cut the plate or panel and a structure for passing the wire in a direction (Y) perpendicular to the direction (X) of travel of the plate or panel. The device for cutting allows a cut to be made that greatly limits the waste and dust generated.

A deflection roller (32) for a deflection roller package (33) of a wire saw (1), having a wheel (32), a pivot bearing (42) and a sealing element (55). The wheel (32) has a raceway (45) along the periphery thereof for guiding a saw wire (3) of the wire saw (1). The pivot bearing (42) is coaxially inserted in the wheel (32). An outer sleeve (51) protrudes from a lateral surface (49) of the wheel (32). An inner sleeve (50) protrudes from a lateral surface opposite the one lateral surface (49). A radius (53) of the inner sleeve (50) is smaller than a radius (52) of the outer sleeve (51). The sealing element (55) is placed on the outer sleeve (51) or inserted into the inner sleeve (50).

A wire saw 1 according to the invention for an endless saw wire 3 has a housing 6, a wire drive 9, and a wire store 7. The wire drive 9 is for pulling the saw wire 3 in a circulating direction 8. The wire store 7 has a first package 31 of deflection rollers 32 and a second package 33 of deflection rollers 32. The second package 33 is mounted so as to be displaceable with respect to the first package 31 along a direction 14 in order to increase a length of the saw wire 3 stored on the wire store 7. A feed device 38 exerts a feed force on the second package 31 in the direction 14. The wire store 7 is arranged downstream of the wire drive 9 in the circulating direction 8. The wire saw pulls the saw wire 3 in the circulating direction 8, resulting in a tensile stress on the saw wire 3 running into the wire saw 1. By contrast, the saw wire 3 running out of the wire saw 1 is largely without tension. The relative arrangement of wire drive 9 and wire store 7 allows tensioning of the running-out saw wire 3 by the wire store 7.

A pivotable wire deflector 19 for a saw wire 3 of a wire saw 1 has a deflection roller 32, a pivot joint 60 and a clamping and spreading mechanism. The defection roller 32 has a running groove 45 for guiding the saw wire 3 of the wire saw 1. The pivot joint 60 has a rotary bearing block with a cylindrical receptacle 65, and a tube 63 which is arranged so as to be rotatable in the cylindrical receptacle, wherein the deflection roller 57 is attached to the one of rotary bearing block 62 or tube 63. A clamp 70 is fastened to the rotary bearing block 62 and arranged so as to enclose the tube 63. A lever 68 can be moved manually between a first position and a second position.

Provided are a method for machining a plate material by using a linear saw, and a numerical control saw machine apparatus. The numerical control saw machine apparatus includes: two carrying mechanisms, which are connected to two ends of a linear saw respectively; at least one control motor, configured for adjusting a distance between the two carrying mechanisms; and a pair of vibration motors, configured for driving the vibration of the linear saw, wherein, the distance between the two carrying mechanisms is adjusted by the control motor based on a monitored change in a torque of the control motor.

A bearing unit for a marble cutting machine, comprising a radially outer ring, rotatable about an axis of rotation (X) of the bearing unit and provided with a radially outer flange portion; a stationary radially inner ring having a raceway and a through hole; a row of rolling bodies interposed between the radially outer ring and the radially inner ring; a seat formed in the radially inner ring and shaped as a portion of a circular crown; and a sensor fit in the seat, wherein a ratio between an internal diameter (D) of the through hole and an axial thickness (t) of the radially inner ring is between 6.7 and 11.1.

An overhead sawing device comprising a central frame, a cutting cable, a driving unit, a first and a second arms configured to deflect the cutting cable to a lower level, at least two rotatable arms configured to receive the cutting cable from the higher level and to guide said cable during a cut. The device further includes a telescopic cable tensioning element. A method of operating the device is also provided, which method permits the execution of a continuous cut without repositioning the device, even in confined spaces.