A band saw blade sensor and control system to sense and control saw blade deviation of a continuous, flexible metal saw blade driven around a pair of pulleys. A pair of spaced proximity inductive sensors is positioned adjacent to a side of the saw blade in order to detect blade deviation during operation. A controller mechanism receives input from each of the pair of inductive sensors in order to control and adjust band tension on the blade, and in order to control and adjust blade force on a work piece.

Provided are a porous media bearing for a band saw, a band saw for cutting cant and a method of cutting cant using the band saw. The band saw has a continuous loop blade supported by a drive wheel and first and second support arms having porous media bearings. A location of a blade cutting section, an angle of the blade in relation to the cant being cut, and tension on the blade can be adjusted by moving the first and second support arms.

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.

A portable pipe saw assembly includes a saw that may be manipulated thereby facilitating the saw to engage a member. The saw has a pair of housings. The housings are spaced apart from each other to define a cutting space. The cutting space receives the member. The cutting space has a width of at least sixteen inches and a depth of at least twenty inches. A cutting unit is movably coupled to the saw. The cutting unit engages the member thereby facilitating the cutting unit to cut the member.

A band saw blade sensor and control system to sense and control saw blade deviation of a continuous, flexible metal saw blade driven around a pair of pulleys. A pair of spaced proximity inductive sensors is positioned adjacent to a side of the saw blade in order to detect blade deviation during operation. A controller mechanism receives input from each of the pair of inductive sensors in order to control and adjust band tension on the blade, and in order to control and adjust blade force on a work piece.

A band saw blade sensor and control system to sense and control saw blade deviation of a continuous, flexible metal saw blade driven around a pair of pulleys. A pair of spaced proximity inductive sensors is positioned adjacent to a side of the saw blade in order to detect blade deviation during operation. A controller mechanism receives input from each of the pair of inductive sensors in order to control and adjust band tension on the blade, and in order to control and adjust blade force on a work piece.

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.

A band saw machine includes a base, a sawing unit, a tension adjustment unit, and a tension detector. The base has a straight post, an upper wheel case connected with the straight post, and a lower wheel case connected with the straight post. The sawing unit has an upper axle vertically movably disposed in the upper wheel case, an upper wheel rotatably connected to the upper axle, a lower axle disposed in the lower wheel case, a lower wheel rotatably connected to the lower axle, and a saw band wound around the upper and the lower wheels. The tension adjustment unit is disposed to the base and connected to the upper axle for pushing the upper axle to move upwards. The tension detector is disposed to the upper axle and detects a minor deformation of the upper axle for accurately detecting the current tension of the saw band.

A band saw machine includes a base, a sawing unit, a tension adjustment unit, and a tension detector. The base has a straight post, an upper wheel case connected with the straight post, and a lower wheel case connected with the straight post. The sawing unit has an upper axle vertically movably disposed in the upper wheel case, an upper wheel rotatably connected to the upper axle, a lower axle disposed in the lower wheel case, a lower wheel rotatably connected to the lower axle, and a saw band wound around the upper and the lower wheels. The tension adjustment unit is disposed to the base and connected to the upper axle for pushing the upper axle to move upwards. The tension detector is disposed to the upper axle and detects a minor deformation of the upper axle for accurately detecting the current tension of the saw band.

A band saw assembly and a blade tensioner assembly are set forth. Unlike many past devices, the band saw assembly has two blades for cutting workpiecesa first blade and a second bladeenabling bi-directional cutting actions in both forward and retract motions. The blade tensioner assembly can be employed to bring both blades of the band saw assembly to equal and proper tensioning values for use, and has a pair of actuators. Potential applications of use include metalworking, woodworking, glass and ceramic material cutting, plastics and fibrous material cutting, and food processing, among many other workpiece possibilities. The band saw assembly may prove particularly useful for high production and manufacturing plants and facilities.