A grindstone that enables grinding, polishing, super-finish polishing by using the same grindstone, without clogging even if the grindstone is being used continuously, in which a grinding/polishing section for processing a workpiece has a honeycomb structure formed by arranging polygonal prisms with no clearance therebetween. The grindstone includes the grindstone columns consisting of abrasive grains and binder and having an axis in depth direction of grinding/polishing surface, which are disposed on intersections or wall portions of the honeycomb structure. Porous elastomer is disposed inside the honeycomb structure, thus making it possible to perform a super-finish polishing.

A grinding apparatus includes: a holding table for holding a workpiece thereon; a grinding unit including a grinding wheel for grinding the workpiece held on the holding table, the grinding wheel including a grinding stone made of abrasive grains and grains of photocatalyst bonded by a vitrified bonding material; a grinding water supply unit configured to supply grinding water to the grinding stone when the workpiece held on the holding table is ground by the grinding unit; and a light applying unit disposed adjacent to the holding table and configured to apply light to a grinding surface of the grinding stone while the workpiece held on the holding table being ground.

A grinding apparatus includes: a holding table for holding a workpiece thereon; a grinding unit including a grinding wheel for grinding the workpiece held on the holding table, the grinding wheel including a grinding stone made of abrasive grains and grains of photocatalyst bonded by a vitrified bonding material; a grinding water supply unit configured to supply grinding water to the grinding stone when the workpiece held on the holding table is ground by the grinding unit; and a light applying unit disposed adjacent to the holding table and configured to apply light to a grinding surface of the grinding stone while the workpiece held on the holding table being ground.

An end mill has a shank and a cutting edge portion. The shank has a coolant supply path. The cutting edge portion covers an outlet of the coolant supply path and is provided on the shank. The cutting edge portion is made of a porous body.

A grinder head for high pressure mobile cleaning of roadways. The grinder head combines a rotating spinner member having polycrystalline diamond cutting tips which work in combination with ultra-high pressurized fluid for removing roadway stripes and the like matters from a roadway with damaging the underlying surface. The cutting tips having a polycrystalline diamond cutting material and are positioned along an outer rim of the spinner member in either a single or staggered position.

A multi-angle two-dimensional ultrasonic vibration assisted nanofluid micro-lubrication grinding device includes a workpiece fixture for clamping a workpiece and a grinding wheel for grinding the workpiece, the fixture being connected with a two-dimensional ultrasonic vibration device to maintain the sharpness of the grinding wheel cutting edge and cool the grinding temperature on the workpiece surface; a jetting mechanism used for jetting nanofluid to the workpiece is arranged on one side of the grinding wheel so as to form two-dimensional ultrasonic vibration and nanofluid micro-lubrication grinding coupling; the device applies the variable-angle two-dimensional ultrasonic vibration technology to grinding processing, and adjusts the angles of two ultrasonic vibrators to generate different combined vibration directions to change the relative movement trajectories of abrasive particles and a workpiece. A grinding force and grinding temperature are detected in real time by force measurement and temperature measurement devices, meanwhile cooperation with nanofluid micro-lubrication is utilized.

A diamond special-shaped grinding wheel includes an upper base body, a lower base body, and a grinding ring. The upper base body is disposed at the upper end of the lower base body, and the upper base body and the lower base body are fixedly connected to form a grinding wheel body. The grinding ring is fixed to an outer ring of the grinding wheel body; the grinding wheel body is internally provided with one or two annular grooves communicated with the upper end face of the grinding wheel body. A plurality of mixed flow channels is formed in the grinding ring. One end of each mixed flow channel extends to an annular grinding opening of the grinding ring, the other end is communicated with one annular groove, and the annular grooves are communicated with an external negative pressure air source device. Also disclosed is a vertical machining cooling system.

A diamond special-shaped grinding wheel includes an upper base body, a lower base body, and a grinding ring. The upper base body is disposed at the upper end of the lower base body, and the upper base body and the lower base body are fixedly connected to form a grinding wheel body. The grinding ring is fixed to an outer ring of the grinding wheel body; the grinding wheel body is internally provided with one or two annular grooves communicated with the upper end face of the grinding wheel body. A plurality of mixed flow channels is formed in the grinding ring. One end of each mixed flow channel extends to an annular grinding opening of the grinding ring, the other end is communicated with one annular groove, and the annular grooves are communicated with an external negative pressure air source device. Also disclosed is a vertical machining cooling system.

An apparatus for surface finishing includes a robot and an end effector. The end effector includes a compliance wrist having an axis of movement and coupled to the robot and a grinder tool coupled to the compliance wrist. The robot is configured to controllably position the end effector in three-dimensional space. The compliance wrist is configured to bias the grinder tool to a biased position relative to the robot and enable the grinder tool to move relative to the robot in response to an external force acting upon the grinder tool.

An apparatus for surface finishing includes a robot and an end effector. The end effector includes a compliance wrist having an axis of movement and coupled to the robot and a grinder tool coupled to the compliance wrist. The robot is configured to controllably position the end effector in three-dimensional space. The compliance wrist is configured to bias the grinder tool to a biased position relative to the robot and enable the grinder tool to move relative to the robot in response to an external force acting upon the grinder tool.