367results about "Superfinishing machines" patented technology

The invention discloses a two-dimensional ultrasonic vibration auxiliary grinding device used for grinding large structural parts. An upper panel and a lower panel are supported and fixed by a landing leg; the two ends of the upper panel are provided with an adjustable pressure pad and a pressure pad; a longitudinal amplitude transformer is fixedly connected with a longitudinal transducer; a coaxial amplitude transformer is fixedly connected with a coaxial transducer; the longitudinal end of the upper panel is fixedly connected with the longitudinal amplitude transformer; the coaxial end of the upper panel is fixedly connected with the coaxial amplitude transformer; the longitudinal transducer is connected with a first ultrasonic generator; the coaxial amplitude transformer is connected with a second ultrasonic generator; the output line of the first ultrasonic generator is connected with a first cymometer; the output line of the second ultrasonic generator is connected with a second cymometer; a processing grinding wheel is arranged on the upper part of the upper panel, thus solving a series of difficulties like low processing efficiency, poor surface quality and high processing cost of a structural ceramic material and realizing the precise processing of a large ceramic flat with high efficiency and quality.

The invention disclose a single-channel single-race bearing superfine grinding machine including a machine frame with an operating desk, as well as a workpiece seat, a grinding device and a material loading device which are arranged on the operating desk, wherein the workpiece seat includes four rollers which are arranged by groups of two, so as to form a race grinding service position and a channel grinding service position; the grinding device includes a race grinding device which is used for race processing and arranged corresponding to the race grinding service position, and a channel grinding device which is used for channel processing and arranged corresponding to the channel grinding service position; the material loading device includes a portal frame arranged athwart above the workpiece seat, first and second traverse motion mechanisms arranged on the portal frame, as well as first and second manipulators which are respectively connected with the first and the second traverse motion mechanisms, wherein the first manipulator is used for sending a workpiece to the race grinding service position, and the second manipulator is used for sending the workpiece from the race grinding service position to the channel grinding service position. The single-channel single-race bearing superfine grinding machine has the advantages of fully automatic running, precise processing and so on.

The invention provides an ultraprecise grinding method for a special-shape thin-wall complex-structure workpiece, and relates to a machining technology. According to the ultraprecise grinding method, clamping errors caused by secondary clamping are reduced, the precision of the machined surface shape of the workpiece is guaranteed, and a bulb grinding wheel rod and the workpiece do not interfere with each other. The ultraprecise grinding method includes the steps that the accurate size of the precisely-machined workpiece is obtained, the front end of a workpiece inner rod is clamped, and the clamped portion of the workpiece is subjected to ultraprecise grinding in a mutual-reference mode; a fine-grain metal-based diamond bulb grinding wheel for ultraprecise grinding is installed, and the sphere center of the bulb grinding wheel is adjusted onto the rotating axis of a precise rotating table. The workpiece is installed on a workpiece main shaft through a collet chuck, and it should be guaranteed that the radial play eccentricity of the workpiece is smaller than 5 microns in the installation process. Tool setting for the workpiece is conducted through a CCD tool setting system, and a machining original point is obtained so that the high precision of the surface shape of the machined workpiece can be guaranteed. Ultraprecise grinding of the special-shape thin-wall complex-structure workpiece is achieved by planning the movement track of the bulb grinding wheel.

A pressing device (50) for pressing cutting means onto circumferential surfaces (12) of substantially cylindrical workpiece portions (13) during a finishing operation is provided for pressing the cutting means onto a circumferential surface with a pressing force over a contact angle. The pressing device is steplessly adaptable for the machining of workpiece portions of differing diameters that have a diameter difference of at least 0.1 mm.

The invention relates to a static head frame of a grinding machine, which can realize precise and super-precise grinding, comprising a sleeve, a head frame spindle, a support box body, a head frame tip which is arranged on the front end of the head frame spindle and a head frame motor which is connected with the back end of the head frame spindle; wherein, the sleeve is positioned on the support box body; a front end cover is arranged at the front end of the sleeve; the front end and the back end of the head frame spindle are respectively supported on the sleeve through a front liquid hydrostatic bearing and a back liquid hydrostatic bearing; liquid medium is filled between the head frame spindle and both the front liquid hydrostatic bearing and the back liquid hydrostatic bearing; a thrust shaft shoulder is arranged on the head frame spindle and sleeved with a circle of gasket; the thrust shaft shoulder and the gasket are both positioned between the front liquid hydrostatic bearing and the front end cover; a front end gap exists between the front end of the thrust shaft shoulder and the front end cover and a back end gap exists between the back end of the thrust shaft shoulder and the front liquid hydrostatic bearing; and liquid medium is filled in the front end gap and the back end gap to form a liquid hydrostatic thrust bearing. The head frame has the advantages of good rigidity, high rotation accuracy, good vibration reducing performance and long precision life.

A process for point superabrasive machining of a nickel based material comprising the steps of providing a tool having a grinding surface coated with a superabrasive material, orienting the tool relative to a surface of the nickel based material to be machined so that there is point contact between the surface to be machined and the grinding surface, and forming a part by removing material at the point contract by rotating the tool. The tool comprises an enlarged portion, a tip portion, and a first shaft portion extending from the enlarged portion to the tip portion, the first shaft portion and the tip portion being coated with an abrasive material, and the first shaft portion having a constant diameter.

Driving rollers 2, 3 which rotate in the same direction are arranged in parallel to each other. A plurality of convex portions 5a, 5b, 5c having different radii of curvature Rr1, Rr2 and Rr3 are formed along the axial direction at opposing positions on the driving rollers 2, 3. A rolling element 4 which is fed into the gap between the driving rollers 2, 3 and rotated is moved along tracks having different radii of curvature Rw1, Rw2 and Rw3 in the axial direction. There is provided a superfinishing grindstone 6 which is pressed on the rolling surface of the rolling element 4 moving on tracks having different radii of curvature to superfinish the rolling surface of the rolling element 4.

The invention relates to a technique and a method for the finishing processing of gears, in particular to the lapping processing of hypoid gears and spiral bevel gears which have complicated tooth shapes and hard tooth surfaces. The lapping processing method comprises the steps as follows: (1) a pair of gears that need going through lapping processing and comprise a driving gear and a driven gear are assembled together in a way of meshing transmission, the driven gear is driven by the driving gear to carry out rotation movement; (2) preset brake torque is applied on the driven gear; (3) high frequency vibration is applied on the driving gear and/or the driven gear. Highly efficient but low cost lapping processing can be carried out by the method to various gears with the hard tooth surfaces, particularly small modulus gears so as to improve the meshing precision of the gears and reduce vibration and noise in transmission.

The invention relates to an outer-ring superfinishing machine for four-point contact bearings. The outer-ring superfinishing machine comprises a feed device, a pressing device, a vibration device and a discharge device. An angular transformation mechanism is arranged on the superfinishing machine, and a feeding and discharging place turning mechanism is arranged in the outer-ring superfinishing machine. By the arrangement of the angular transformation mechanism, two channels with different angles can be superfinished on the same base level, and machining precision is much higher than uniformity of a traditional machine tool machining in different surfaces; machined part models are replaced and a positioning block structure is adopted, sot that manual adjustment is omitted, and plug and play can be realized; by adding the feeding and discharging place turning mechanism on the angular transformation mechanism,, time for superfinishing can be greatly shortened.

The invention discloses a superfine grinding oscillation mechanism which comprises an oscillation mechanism on a superfine grinding machine. Two balance wheels between left and right balance blocks are rotatably connected with a Geneva wheel together; the Geneva wheel is composed of two symmetric parts which are fixed on rotation shafts by bolts respectively; a drive wheel is mounted on the rotation shafts on the two sides of the Geneva wheel in a manner symmetrically protruding out of a shaft surface; and a transmission plate is coupled between the drive wheel and a ram. Through the invention, the oscillation frequency can be improved by more than one time, the oscillation conversion is smooth, the impact is obviously reduced, and the superfine grinding oscillation mechanism is favorable for improving the processing efficiency as well as surface accuracy and quality of products.

In-process non-contact measurement systems and methods for automated lapping systems are disclosed. In an embodiment, a moveable frame can be controllably positioned proximate to a lapped work product. A control component can provide first control signals to control a movement of the moveable frame relative to the lapped work product. A non-contact measuring device can be coupled to the moveable frame measures a surface of the lapped work product and can transmit measurement data of the surface of the lapped work product to the control component. The control component can further provide second control signals to control a movement of the non-contact measuring device relative to the moveable frame.

The invention discloses an inner ring groove grinding and ultra-fine-processing integral machine for a fully automatic bearing ring. The inner ring groove grinding and ultra-fine-processing integral machine comprises a machine tool, wherein a grinding device, a groove grinding detection device and an ultra-fine-processing device are arranged on the machine tool. The problem of low efficiency of the existing inner ring groove forming is solved. The grinding device, the groove grinding detection device and the ultra-fine-processing device are installed together; the inner ring processing efficiency of the bearing ring is improved; meanwhile, the processing precision stability is high. A grinding wheel trimmer is added, so that the service life of the grinding and ultra-fine-processing integral machine is higher, and the precision is higher.

A shoe assembly for a micro-finishing machine for finishing a workpiece includes a C-frame structure adapted for nonrotatable mounting to the micro-finishing machine. The C-frame assembly includes a pair of slats and a replaceable insert secured nonrotatably to the C-frame assembly.

The present invention relates to a device for performing fine machining on an annular workpiece, which comprises the following components: a workpiece bracket (1) which drives rotatably; a double-axis base machine tool (3) which comprises a rotating unit (2), wherein the base machine tool allows linear feeding movement of the rotating unit along a horizontal axis (X) and a vertical axis (Y); and a cutter tower (4) which is connected with the rotating unit and comprises a rotation axis (5) and a plurality of cutter carriers that are circumferentially arranged in the rotation axis. The rotating unit comprises a rotation axis (B) which is vertical to the two linear axes. The rotation axis of the cutter tower is aligned to vertical with the rotation axis of the rotating unit so that the cutter tower performs rotation movement in the rotation axis in a period when the rotating unit is activated. At least one cutter carrier of the cutter tower comprises a device (6) which is used for short-stroke honing and comprises an oscillation driving member that generates the oscillation movement of a honing millstone carrier (8). At least one another cutter carrier of the cutter tower is equipped for receiving a material cutter such as a hard turning tool (9).

The invention discloses an ultrasonic stamping type cutting and extruding integrated machining method. The ultrasonic stamping type cutting and extruding integrated machining method comprises the following steps that transverse ultrasonic vibration which is perpendicular to the cutting speed direction or contains a vibration component perpendicular to the cutting speed direction is applied to a cutting tool on a machine tool; cutting parameters and ultrasonic vibration parameters are set, so that a dynamic negative rear angle is generated in the cutting process, and ultrasonic-frequency impactextrusion is performed on the surface of a workpiece by a rear tool face of the tool; the extrusion overlap ratio is set; a grinding dulling standard of a rear tool face of an extruding and cutting tool is set; the vibrating and cutting track phase difference of adjacent rotation of the tool is controlled; the machine tool and ultrasonic vibration are started, so that workpiece cutting and extrusion reinforcement of the surface of the workpiece are completed through one working procedure. According to the ultrasonic stamping type cutting and extruding integrated machining method, a reinforcing working procedure is not needed to be additionally provided, and the surface of the workpiece can undergo extrusion reinforcement while the workpiece is cut.

A method for controlling the residue clearing process of a chemical mechanical polishing (“CMP”) process is provided. Dynamic in-situ profile control (“ISPC”) is used to control polishing before residue clearing starts, and then a new polishing recipe is dynamically calculated for the clearing process. Several different methods are disclosed for calculating the clearing recipe. First, in certain implementations when feedback at T0 or T1 methods are used, a post polishing profile and feedback offsets are generated in ISPC software. Based on the polishing profile and feedback generated from ISPC before the start of the clearing process, a flat post profile after clearing is targeted. The estimated time for the clearing step may be based on the previously processed wafers (for example, a moving average of the previous endpoint times). The calculated pressures may be scaled to a lower (or higher) baseline pressure for a more uniform clearing.

A superfinishing method of a tapered roller bearing, including the steps of: rotating an outer ring of the tapered roller bearing about a center axis thereof; inserting a straight-shaped superfinishing stone from a front face of outer ring; and slidingly contacting a leading end face of the superfinishing stone with a taper-shaped raceway surface formed in an inner peripheral surface of the outer ring to thereby superfinish the raceway surface. The superfinishing stone is inclined outwardly of the front face of outer ring with respect to a vertical line of the raceway surface.

A method for abrasive material removal that includes the steps of establishing an optimum force profile relating to the force or contact pressure applied by a processing tool on a workpiece. The actual force generated during the metal removal operation is monitored and compared to the optimum force profile. Based on the comparison of the actual force with the optimum force profile machine parameters are adjusted such that the actual force generated follows the established optimum force profile.

The present invention relates particularly to an oscillating grinding machine. The grinding machine comprises a driving motor (3) surrounded by a body (3), and a drive shaft (4) cooperating with the driving motor. The drive shaft comprises a grinding head (5) that constitutes a support for a grinding product (8). The drive shaft (4) is arranged in two pieces and comprises a main shaft (11) and an eccentric shaft (10) arranged rigidly thereto. The eccentric shaft comprises a centre line (12) that assumes an angle (α) against a corresponding centre line (13) of the main shaft, and thus the grinding head (5) will assume an eccentric placement in relation to the main shaft (11). Thus, the grinding head is arranged to oscillate in a substantially spherical plane provided by the rotation of the main shaft and the eccentricity and inclination of the eccentric shaft in relation to the main shaft.

An efficient ultrasonic polishing apparatus for the axle-type parts is composed of a HF (200000-300000 H2) ultrasonic generator and a grinding head, and is installed to the cutting-tool carrier. Its polishing method features that the part to be polished is fixed to a lathe.

The invention discloses an ultra-precision grinding machine for a ball track. The grinding machine comprises a base, a camshaft, an emptying swing arm and a material receiving swing arm, wherein feeding components consisting of material hanging rods, feeding guide sleeves, emptying mechanisms, mechanical hands, blanking frames and bearing brackets are arranged on the base; emptying mechanisms are fixed on an emptying shaft; the mechanical hands are fixed on a material receiving shaft; two sides of the mechanical hands are provided with rolling rod mechanisms; grinding heads which swing in a reciprocating mode are arranged above the mechanical hands; ejector rod tools are arranged below the grinding heads; radial cams, a material receiving surface cam and an emptying surface cam are arranged on the camshaft; the ejector rod tools are driven by the radial cams to vertically move; the material receiving surface cam makes the material receiving shaft move transversely through the material receiving swing arm; and the emptying surface cam makes the emptying shaft move transversely through the emptying swing arm. Due to the structure, the ball track can be fully automatically machined, rough ultra-precision machining and finish ultra-precision machining can be performed on the same machine tool, and the quality and machining efficiency of the product are improved; meanwhile, the grinding machine is simple and compact in structure and convenient to operate, and the protection safety is improved.

The invention disclose a double-channel bearing superfine grinding machine including a machine frame with an operating desk, as well as a workpiece seat, a grinding device and a material loading device which are arranged on the operating desk, wherein the workpiece seat includes three rollers which are arranged in parallel, every two adjacent rollers form a grinding service position; the grinding device includes two channel grinding devices respectively corresponding to the two grinding service positions, so as to process channels on the workpieces in the grinding service positions; the material loading device includes a portal frame arranged above the workpiece seat, first and second traverse motion mechanisms arranged on the portal frame, as well as first and second manipulators which are respectively connected with the first and the second traverse motion mechanisms, wherein the first manipulator is used for sending one workpiece to one of the channel grinding service positions, and the second manipulator is used for sending the workpiece from one of the channel grinding service positions to the other channel grinding service position. The double-channel bearing superfine grinding machine has the advantages of fully automatic running, precise processing and so on.

A flexible finishing shoe for finishing a workpiece have a bearing surface and an adjacent side, the flexible finishing shoe comprising a shoe base having a first side and an opposing second side and a finishing body disposed between the first and second sides, the finishing body made from a flexible non-metallic material capable of conforming to the bearing surface and adjacent side.