A workpiece holding assembly (20) comprises a magnetic chuck (22), and first and second separate sets of workrests for engaging with the outer circumferential surface of an annular workpiece (40, 60). The workrests are configurable such that when the outer circumferential surface of the workpiece (40, 60) is ground with the chuck Urotating in one direction, the outer circumferential surface is only urged in contact with the first set (26, 28) of workrests, and when an inner circumferential surface of said workpiece is ground with the direction of rotation of the chuck reversed, the outer circumferential surface is only urged in contact with the second set (30, 32) of workrests. Grinding methods using such a workpiece holding assembly are also described.

A workpiece holding assembly (20) comprises a magnetic chuck (22), and first and second separate sets of workrests for engaging with the outer circumferential surface of an annular workpiece (40, 60). The workrests are configurable such that when the outer circumferential surface of the workpiece (40, 60) is ground with the chuck Urotating in one direction, the outer circumferential surface is only urged in contact with the first set (26, 28) of workrests, and when an inner circumferential surface of said workpiece is ground with the direction of rotation of the chuck reversed, the outer circumferential surface is only urged in contact with the second set (30, 32) of workrests. Grinding methods using such a workpiece holding assembly are also described.

A wheel weight-reducing pit cleaning device is provided. The wheel weight-reducing pit cleaning device comprises a lower lifting driving system, a side brush system, a ring brush unit, a ring brush system, a clamping driving system, a pressing system. The weight-reducing pit cleaning device is used for cleaning and removing the edge burrs of the drainage groove and the weight reduction groove at the wheel weight reduction pit.

A wheel weight-reducing pit cleaning device is provided. The wheel weight-reducing pit cleaning device comprises a lower lifting driving system, a side brush system, a ring brush unit, a ring brush system, a clamping driving system, a pressing system. The weight-reducing pit cleaning device is used for cleaning and removing the edge burrs of the drainage groove and the weight reduction groove at the wheel weight reduction pit.

A method for preparing a multilayer metal composite pipe includes steps of: internally and externally grinding blank pipes; cleaning oil stains; assembling a multilayer metal pipe; drawing to reduce a diameter; performing high-speed friction welding at the pipe ends; performing heat treatment; performing four-roller cross-rolling; straightening; performing two-roller cold-rolling; performing cold-drawing to reduce the diameter; performing cold-expansion to reduce the diameter; performing precise cold-rolling; degreasing; brightening; performing surface grinding; cleaning dust; detecting multilayer metal interface bonding; detecting flaws; testing metal structure performance; and sizing and packaging. By cycling the cold-drawing, the cold-expansion, and the precision cold-rolling, key indicators such as product dimensional accuracy, surface quality, material properties, and crystal grain size can be collaboratively controlled, so as to achieve higher accuracy, better performance, and more outstanding extreme specifications. The present invention solves the problem of inconsistent extension due to differences in metal properties.

A rolling mill system for Incremental rotary shaping of an elongated workpiece is provided that includes first and second workpiece holders. A support frame has a track with the first and second workpiece holders being movably associated with the track, the workpiece holders and an associated workpiece being movable in unison along the track. A radial chuck is mounted to the frame that includes a plurality of jaws that are movable radially inwardly and outwardly. Each jaw has a tool mounted thereto that is rotatable about an axis of rotation, with the axis of rotation of each tool being oriented at a skew angle relative to the longitudinal axis of a workpiece. A source of electric current and an electrically conductive flow path are provided for flowing electrical current through a workpiece. A controller is provided that is configured to control the operation of each of the first motor, second motor and third motor, and to control the flow of current flowing through the tools to the workpiece.

The present application discloses a multifunctional wheel burr removing device, comprising a synchronous clamping drive system, a first burr brushing system, an upper burr brushing system and a second burr brushing system. The multifunctional wheel burr removing device in use may remove burrs of four parts. And the four parts are as follows: end faces of upper rims, wheel wells, cutting positions of sides of upper rims and fronts of wheels having different diameters and different heights. So the production efficiency is very high; and simultaneously, the device has the characteristics of high automation degree, advanced process, strong generality, safety and stability.

The present application discloses a multifunctional wheel burr removing device, comprising a synchronous clamping drive system, a first burr brushing system, an upper burr brushing system and a second burr brushing system. The multifunctional wheel burr removing device in use may remove burrs of four parts. And the four parts are as follows: end faces of upper rims, wheel wells, cutting positions of sides of upper rims and fronts of wheels having different diameters and different heights. So the production efficiency is very high; and simultaneously, the device has the characteristics of high automation degree, advanced process, strong generality, safety and stability.

A method for producing one or more bearing components along a production line, comprising honing the bearing components along the production line, cleaning the bearing components along the production line, grinding the bearing components along the production line, and transporting the bearing components along the production line utilizing one or more transport units.

A method for producing one or more bearing components along a production line, comprising honing the bearing components along the production line, cleaning the bearing components along the production line, grinding the bearing components along the production line, and transporting the bearing components along the production line utilizing one or more transport units.