The present invention concerns a Machine (10, 10′) for simultaneous cutting of a plurality of slabs (18) from a block (B) of stone material through a plurality of band saw blades (11), wherein each of said band saw blades (11) is closed in a loop between a respective driving pulley (12) or a shared driving drum and a respective driven pulley (13) or a shared driven drum, said driving pulleys (12) or said shared driving drum rotating around a first axis (A) of rotation, or respective first axes of rotation parallel to each other, and said driven pulleys (13) or said shared driven drum rotating around the same second axis (A′) of rotation, parallel to said first axis (A) of rotation, or respective second axes of rotation parallel to each other and parallel to said first axes of rotation, said axis (A) of rotation of the driving pulleys (12) or of said shared driving drum and said axis of rotation (A′) of the driven pulleys (13) or of said shared driven drum being in turn mounted on a frame (14) movable with respect to said block of stone material, along two directions (x,y) incident to each other, one direction (x) of cutting said block (B) of stone material, said direction (x) of cutting being disposed on a plane (τ) of cutting of said slabs (18), said plane (τ) of cutting being in its turn incident with respect to a direction (y) of relative advancement of said block (B) of stone material with respect to said frame (14), characterised in that the plane (π) to which said direction (x) of cutting and said direction (y) of relative advancement of said block (B) of stone material with respect to said frame (14) belong is horizontal and at least the portion of the path of each of said band saw blades (11) included between respective movable spacers (19) is inclined with respect to the vertical of an angle (β) comprised between 3 and 20° in the direction of cutting.

A cutting belt comprises a guide bar system that includes a guide bar. The guide bar has a first end section, a second end section, and a central section between the first end section and the second end section. A first upper fluid channel is defined through the guide bar. The first upper fluid channel has an entrance opening in the first end section of the guide bar and extends to the central section of the guide bar where it is in fluid communication with a bottom channel. The second upper fluid channel has an entrance opening in the second end section of the guide bar and extends to the central section of the guide bar where it is in fluid communication with the bottom channel.

According to a processing method of a stone composite board, the two sides of a natural stone board are ground and flattened until a preset standard value of thickness variation is reached, then the surface planes and base material layers are subjected to pressure-compositing through adhesive layers, afterwards splitting is conducted, and the natural stone layer is subjected to calibrated planing with diamond roller and surface treatment to obtain the ultra-thin stone composite board.

A device for cutting a block of stone that includes a support bar including a monolithic metallic plate, and a number of fluid ports attached to the plate. The device also includes a wear bar that is secured to the monolithic metallic plate and a lower longitudinal slot, and a cutting belt positioned in the lower longitudinal slot of the wear bar and including a downward-facing cutting surface to cut the block of stone. A method of cutting the stone block is also disclosed.

A horizontal multi diamond wire saw cutting machine in a closed loop running in a coaxial motion toward stone blocks allowing a cutting force direction to each other, the cutting direction of DW is in horizontal motion-whether stone blocks toward machine or machine running toward blocks- and tension system made of one tension pulley because of one DW running within machine, in addition the running of DW is by several drive wheels, set of drive wheels run by one shaft in clockwise motion, another set run by another shaft in counter clockwise motion. Each drive wheel supported by sprag clutch which allow pulling DW for the cutting speed and allow DW to be tensioned in all drive wheels by one tensioned pulley which is tightened by linear stroke by a jack with a set tension value. Further, a portable machine to be held within block and cutting execution.

According to a processing method of a stone composite board, the two sides of a natural stone board are ground and flattened until a preset standard value of thickness variation is reached, then the surface planes and base material layers are subjected to pressure-compositing through adhesive layers, afterwards splitting is conducted, and the natural stone layer is subjected to calibrated planing with diamond roller and surface treatment to obtain the ultra-thin stone composite board.

The present invention concerns a Machine (10, 10) for simultaneous cutting of a plurality of slabs (18) from a block (B) of stone material through a plurality of band saw blades (11), wherein each of said band saw blades (11) is closed in a loop between a respective driving pulley (12) or a shared driving drum and a respective driven pulley (13) or a shared driven drum, said driving pulleys (12) or said shared driving drum rotating around a first axis (A) of rotation, or respective first axes of rotation parallel to each other, and said driven pulleys (13) or said shared driven drum rotating around the same second axis (A) of rotation, parallel to said first axis (A) of rotation, or respective second axes of rotation parallel to each other and parallel to said first axes of rotation, said axis (A) of rotation of the driving pulleys (12) or of said shared driving drum and said axis of rotation (A) of the driven pulleys (13) or of said shared driven drum being in turn mounted on a frame (14) movable with respect to said block of stone material, along two directions (x, y) incident to each other, one direction (x) of cutting said block (B) of stone material, said direction (x) of cutting being disposed on a plane () of cutting of said slabs (18), said plane () of cutting being in its turn incident with respect to a direction (y) of relative advancement of said block (B) of stone material with respect to said frame (14), characterised in that the plane () to which said direction (x) of cutting and said direction (y) of relative advancement of said block (B) of stone material with respect to said frame (14) belong is horizontal and at least the portion of the path of each of said band saw blades (11) included between respective movable spacers (19) is inclined with respect to the vertical of an angle () comprised between 3 and 20 in the direction of cutting.

A cutting belt comprises a guide bar system that includes a guide bar. The guide bar has a first end section, a second end section, and a central section between the first end section and the second end section. A first upper fluid channel is defined through the guide bar. The first upper fluid channel has an entrance opening in the first end section of the guide bar and extends to the central section of the guide bar where it is in fluid communication with a bottom channel. The second upper fluid channel has an entrance opening in the second end section of the guide bar and extends to the central section of the guide bar where it is in fluid communication with the bottom channel.

An automatic machining device for machining a high-speed rail pantograph carbon contact strip is sequentially provided with a milling position, a sawing position and a chamfering position, and comprises a rack, a band sawing machine, a workpiece milling device, a workpiece chamfering device, a CNC computer numerical control system and a pneumatic system. A carbon contact strip workpiece to be machined is arranged on the rack and is sequentially subjected to milling, sawing and chamfering machining; and a saw frame of the band sawing machine is also provided with a saw band upper guide servo rotating device and a saw band lower guide servo rotating device, and the saw band upper guide servo rotating device and the saw band lower guide servo rotating device can freely, synchronously and correspondingly rotate a band saw blade within a certain range.

The present invention relates to an automatic machining device for a high-speed rail pantograph carbon contact strip and a machining method therefor. The automatic machining device is sequentially provided with a milling position, a sawing position and a chamfering position, and comprises a rack, a band sawing machine, a workpiece milling device, a workpiece chamfering device, a CNC computer numerical control system and a pneumatic system. A carbon contact strip workpiece to be machined is arranged on the rack and is sequentially subjected to milling, sawing and chamfering machining; and a saw frame of the band sawing machine is also provided with a saw band upper guide servo rotating device and a saw band lower guide servo rotating device, and the saw band upper guide servo rotating device and the saw band lower guide servo rotating device can freely, synchronously and correspondingly rotate a band saw blade within a certain range. In the present invention, a carbon contact strip is machined by means of a sawing mode, the processes of sawing, milling and chamfering are integrated on one device, and the processes of milling, sawing and chamfering can be automatically completed after once clamping, thereby saving materials, and increasing the working efficiency.