The present disclosure relates to a grinding apparatus. The grinding apparatus may comprise a grinding belt cleaning structure. The grinding belt cleaning structure may further comprise a cleaning section at a side of a grinding surface of a grinding belt and a support section at a side of a non-grinding surface of the grinding belt and at a position corresponding to the cleaning section. The grinding belt cleaning structure may be located in a non-grinding area of the grinding apparatus.

There is provided a method for installing an endless abrasive belt to a belt holder unit, the method comprising: aligning a base with the belt holder unit, the base comprising a backing plate and at least one belt extraction element extending from the backing plate, wherein a cartridge having a belt pre-tightened around the cartridge is physically coupled with the base such that there is a space between the backing plate and the cartridge; arranging the cartridge to face the belt holder unit; reducing said space by pressing the cartridge against the belt holder unit that causes the at least one belt extraction element to push said belt off around the cartridge as a response to reducing the space; and causing tightening of said belt to the belt holder unit.

There is provided a method for installing an endless abrasive belt to a belt holder unit, the method comprising: aligning a base with the belt holder unit, the base comprising a backing plate and at least one belt extraction element extending from the backing plate, wherein a cartridge having a belt pre-tightened around the cartridge is physically coupled with the base such that there is a space between the backing plate and the cartridge; arranging the cartridge to face the belt holder unit; reducing said space by pressing the cartridge against the belt holder unit that causes the at least one belt extraction element to push said belt off around the cartridge as a response to reducing the space; and causing tightening of said belt to the belt holder unit.

An expandable handheld pneumatic belt grinder includes a body, an expansion component and an operation component. The body has a receiving space, a pneumatic motor, and a rotating wheel driven by the pneumatic motor. The expansion component has an expansion pipe and an expansion rod which are connected. The expansion rod is coupled to the receiving space. The operation component has a support rod with one end carrying a driven wheel and the other end coupled to the receiving space or expansion pipe. A grinding belt fits around the driven wheel and rotating wheel collectively. A user changes the distance between the rotating wheel and driven wheel by choosing between two options: coupling the support rod of operation component and the receiving space; and coupling the expansion rod of expansion component and the receiving space, and then coupling the support rod of operation component and the expansion pipe.

An expandable handheld pneumatic belt grinder includes a body, an expansion component and an operation component. The body has a receiving space, a pneumatic motor, and a rotating wheel driven by the pneumatic motor. The expansion component has an expansion pipe and an expansion rod which are connected. The expansion rod is coupled to the receiving space. The operation component has a support rod with one end carrying a driven wheel and the other end coupled to the receiving space or expansion pipe. A grinding belt fits around the driven wheel and rotating wheel collectively. A user changes the distance between the rotating wheel and driven wheel by choosing between two options: coupling the support rod of operation component and the receiving space; and coupling the expansion rod of expansion component and the receiving space, and then coupling the support rod of operation component and the expansion pipe.

A grinding device has at least one endless grinding belt guided over deflection elements in at least one direction of circulation (P3) and a press-on arrangement which is configured and arranged such that it exerts a force from the inside on the grinding belt in a press-on area. The press-on arrangement comprises a base body and at least one press-on element arranged on the side of the base body facing the inner side of the grinding belt. The at least one press-on element is connected to the base body via a Velcro or adhesive connection. The grinding device can be a component of a belt grinding machine.

The disclosure relates to a hardbanding removal apparatus and method for use with oilfield tubulars and downhole tools. The apparatus includes a tiltable frame with support arm, a grinding wheel coupled to the support arm, and an idler wheel assembly to supply mechanical feedback to the grinding wheel through the support arm. The mechanical feedback allows the grinding wheel to remove hardbanding accurately and uniformly on tubulars that are eccentric, curved, or have eccentric hardbanding. The tiltable frame enables grinding of tapered sections of the tubular without reorienting the tubular. The method includes removing hardbanding using the apparatus.

An abrasive belt grinding center applicable to grinding and polishing of a whole profile of a blisk is provided, an X-axis feed mechanism, a Y-axis feed mechanism, a Z-axis feed mechanism, a B-axis rotation mechanism and a C-axis rotation mechanism constitute a grinding head feed mechanism, and a housing, a drum, a synchronous driven pulley, a synchronous belt, a synchronous driving pulley, and a grinding head rotation driving motor constitute a grinding head rotation mechanism. In the present application, two grinding heads are utilized to reasonably assign the machining angle and the feeding, and rough machining and fine machining can be both realized by one time of clamping, and the combination of six degrees of freedom in space is achieved by a short drive chain, and further the rigidities of a grinding head mechanism and a workpiece clamping mechanism are ensured.

An abrasive belt grinding center applicable to grinding and polishing of a whole profile of a blisk is provided, an X-axis feed mechanism, a Y-axis feed mechanism, a Z-axis feed mechanism, a B-axis rotation mechanism and a C-axis rotation mechanism constitute a grinding head feed mechanism, and a housing, a drum, a synchronous driven pulley, a synchronous belt, a synchronous driving pulley, and a grinding head rotation driving motor constitute a grinding head rotation mechanism. In the present application, two grinding heads are utilized to reasonably assign the machining angle and the feeding, and rough machining and fine machining can be both realized by one time of clamping, and the combination of six degrees of freedom in space is achieved by a short drive chain, and further the rigidities of a grinding head mechanism and a workpiece clamping mechanism are ensured.

A device or tool setter has the purpose of setting the position of a support bar, adjustably connected to a grinding machine, in relation to a rotatable grindstone of the machine for obtaining a desired edge angle of a tool supported for grinding by the support bar. The device is provided with discs for defining two contact points with the grindstone and a hole for connection to the support bar.