56results about How to "Avoid the influence of machining accuracy" patented technology

The invention relates to a clamping device for precisely machining an inner surface of a conformal optical cowling, which relates to a machining clamping device, and aims at solving the problem that unpredictable total deformation can be produced because a joint surface of the existing clamping device for precisely machining the inner surface of the conformal optical cowling is in a local contact and even in a point contact, the cowling is difficult to completely fix and the machining precision is difficult to guarantee. The upper end of a basal body is provided with a flange, the lower end of the basal body is provided with a base, an inner cavity of the basal body is a curved inner cavity, the cross section of the curved inner cavity is a variable cross section which is gradually narrowed from top to bottom, a plurality of annular positioning bosses are arranged on the inner wall of the curved inner cavity, the curved radian of each annular positioning boss is consistent with that of the outer surface of the cowling, a transverse groove is formed between two adjacent annular positioning bosses, longitudinal grooves are formed in the plurality of annular positioning bosses, and a through hole which is communicated with the curved inner cavity is formed in the center of the bottom of the basal body. The clamping device is used for precisely machining the inner surface of the conformal optical cowling.

The invention discloses a method for detecting and compensating a floor-type boring and milling machine space position by using a two-frequency laser measurement system, and belongs to the field of numerical control machines. In the method, a fixed datum plane is established on a tip of a horizontal lathe guide rail of the numerical control floor-type boring and milling machine, a laser generator of a double-frequency laser interference measurement system which is provided with a computer is fixed on the datum plane, a laser beam emitted by the laser generator is controlled to be higher than the plane of the lathe guide rail, a lower sliding seat of the lathe is provided with a vertical conversion lens, the laser beam emitted by a double-frequency laser generator is conversed by the conversion lens into a vertically upward laser beam, and an interference target lens is arranged on a ram seat of the lathe; and the position of the central point of a boring bar is taken as the first positioning point when an upright column of the lathe and the ram seat are at certain positions, the points of new positions of the upright column of the lathe and the ram seat after movement are taken as second and third positioning points, the laser beam emitted by the double-frequency laser generator is utilized to measure an error due to lathe precision and foundation variation, and the error is compensated by a numerical control system of the lathe, so that the machining precision of the numerical control floor-type boring and milling machine is improved.

The machining method based on active location and position memory mounting system is mainly characterized by that said method includes the following steps: adopting standard location box to blank to be machined and make the blank face with arbitrary shape; adopting filler state of restore memory position so as to make the original mounting position of workpiece in the arbitrarily-changed procedure conversion do not produce change; based on the original mounting reference of workpiece and coordinate conversion method calculating procedure coordinate parameter and making digital control machining program. The workpiece blank is placed into location box, accurately positioned by using location element and fastening element, the filler is injected and the original mounting position of the workpiece can be defined, then can be machined according to the defined procedure.

The invention relates to a coaxiality machining device for a high precision rotary frame. The coaxiality machining device comprises a workbench, a positioning mandrel installed on the workbench through a fixing bolt and a corresponding T-shaped groove nut and a boring tool arranged on a machine tool main shaft and corresponding to the positioning mandrel; a positioning circular truncated cone is arranged on the positioning mandrel, the side face of the positioning circular truncated cone is the positioning face, and the positioning circular truncated cone is sleeved with a positioning hole in one end of the rotary frame; a compression bolt used for compressing the positioning mandrel and the rotary frame is arranged on the positioning mandrel, and the boring tool is located at the other end of the rotary frame. According to the coaxiality machining device and machining method for the high precision rotary frame, not only is the machining efficiency of the rotary frame coaxiality improved, but also the machining precision and the production quality are guaranteed.

The invention provides a processing method for a PVC pipe joint, which belongs to the technical field of pipe processing. The processing method of this kind of PVC pipe joint is characterized in that it comprises the following processing steps: 1) positioning and clamping: positioning and clamping the annular PVC pipe to be processed on the thread cutting device, and the thread cutting device includes a frame body and a workbench , drive motor one, drive motor two, drive motor three, push cylinder one, push cylinder two, push cylinder three, push cylinder four, push cylinder five, turning tool one, turning tool two, turning tool three and turning tool four; 2 ) internal thread processing; 3) shaft segment division; 4) undercut processing; 5) external thread processing. The invention has the advantage that the PVC pipe joint can be prepared by intensively processing the internal thread and the external thread.

The invention provides a nonmagnetic bearing and relates to the technical field of bearings. The nonmagnetic bearing comprises an outer ring, an inner ring, a holder and a ceramic ball. A first grooveis formed in the circumferential direction of the center of the inner diameter of the outer ring. A second groove matched with the first groove is formed in the circumferential direction of the center of the outer diameter of the inner ring. The ceramic ball is fixed between the first groove and the second groove in a spaced mode through the holder. The curvature coefficient of the first groove is larger than that of the second groove. The curvature of the first groove is 0.525-0.510. the curvature of the second groove is 0.515-0.505. the inner ring and the outer ring are improved to be madeof nonmagnetic materials, the curvature coefficients of the first groove of the outer ring and the second groove of the inner ring are lowered, thus the movement track of the ceramic ball in the normal direction of the contact position of the ceramic ball and the outer ring is improved, bearing vibration is lowered, and then noise generated by vibration of a wireless charging rotor rotating at a high speed is lowered. The invention further provides a centerless fixture used for machining the nonmagnetic bearing and a manufacturing method of the nonmagnetic bearing.

The invention belongs to the technical field of numerical control lathes, and particularly relates to a multi-station numerical control lathe. The multi-station numerical control lathe comprises a shell, a fixed cover and a first motor. The first motor is mounted below the shell, and a first motor rotating shaft penetrates through the shell. The portion, in a shell inner cavity, of the first motorrotating shaft is fixedly connected with a support shaft. The maximum ends of first sliding grooves are elastically connected with wave plates through springs. Fixing blocks are mounted in the firstsliding grooves correspondingly. The portion, located in fixing block inner cavities, of the rotating shaft is fixedly connected with a rotating disc. Two hinge rods are hinged to the rotating disc. Asliding rod is hinged to the other end of each hinged rod, and the sliding rods penetrate through the fixing blocks in design. The ends, located at the outer sides of the fixing blocks, of the sliding rods are fixedly connected with fixing plates. According to the multi-station numerical control lathe, by arranging the fixing blocks, the wave plates and limiting grooves, moving rods can be defined from multiple aspects, so that processing wheels can accurately and rapidly cut the surface of a workpiece to be machined, and the arrangement of the four processing wheels greatly improves the working efficiency.

The invention discloses a high wear-resisting oil pressure jacking rod machining process. The high wear-resisting oil pressure jacking rod machining process comprises the following steps of SKD61 rawmaterial preparing, center oil hole drilling, outline and auxiliary thread CNC rough lathing, heat treating, jacking center jig tightening and equipping, outer circle rough grinding, seal ring grooveCNC finish lathing, nitrocarburizing, outer circle and end surface finish grinding, jacking center jig dismantling and flat grinding to control the total length, inner hole CNC finish lathing (to remove the auxiliary thread), outer circle polishing and ultrafine MAX coating. According to the high wear-resisting oil pressure jacking rod machining process, SKD61 raw materials are selected and used as base materials to perform machining, by means of 'overall hard quenching and nitrocarburizing' treatment, a jacking rod is made to have the characteristics of outer hardness and inner toughness to achieve the requirements for jacking rod wear resistance and impact resistance, and by means of configuration of jacking center auxiliary datum, a jacking rod outer circle and a mold installation surface are machined in place in a same work procedure, so that the fact that the materials can also meet the jacking rod machining precision requirements even if large deformation is generated after heattreatment is guaranteed.

The invention relates to a swing-type eccentric inner circle linkage grinding method. According to the method, a workpiece rotating mechanism drives a workpiece to swing around a C axis, a grinding tool feeding mechanism drives a grinding tool to reciprocate in an eccentric inner circle hole in the X-axis direction while the workpiece swings, so that a grinding track, relative to the workpiece, ofthe grinding tool is an inner circle grinding track of a corresponding eccentric inner circle, and the process is conducted until the required eccentric inner circle is ground; within one period whenthe workpiece swings around the C axis, the grinding tool preferably grinds an inner circle hole for one circle in the eccentric inner circle hole in the same circumferential movement direction, preferably, a torque motor is adopted for driving the workpiece rotating mechanism, an angle grating ruler used for collecting real-time rotation angle data is arranged, a linear motor is adopted for driving the grinding tool feeding mechanism, and preferably, a hydrostatic guideway is adopted as a guideway of the grinding tool feeding mechanism. According to the machining method, there is no need todesign or prepare an eccentric clamp special for the eccentric inner circle, time consumed for machining is short, the efficiency is high, the occupied amount of a grinding machine is small, and improvement of the machining precision of the workpiece is facilitated.

The invention relates to a rail-craning trolley-frame boring technology. The rail-craning trolley-frame boring technology includes the steps that for a trolley frame of which heavy plates in a wheel box of the trolley frame are arranged on the inner side, two heavy plates are welded at the corresponding position of the outer side of the wheel box of the trolley frame, and phi 40 mm through holes are formed in a face plate and a bottom plate of the wheel box of the trolley frame with a magnet drill or an air drill, and are formed in crotch opening lines of tracks of the trolley frame and consistent in upper and lower position; foundations are fixed on cement ground, jig frames are arranged on the fixed foundations, the trolley frame is horizontally arranged through jacks, the whole is divided into a wheel-plate-face machining allowance line, a wheel-plate boring machining center line and a datum line; four mattress plates are laid on the jig frames, numerical-control plano determinate-beam boring-milling machines are fixed on the mattress plates, and the trolley frame is bored. The rail craning trolley-frame boring technology has the advantages that the machining quality of components can be effectively improved while production efficiency is improved to a large degree, refurbishing losses are effectively decreased, and production cost is reduced.

The invention belongs to the technical field of metal pipe surface processing, and particularly relates to a processing device for concave structures on the surface of a metal pipe. The processing device comprises a rack, wherein a mounting plate is arranged on the rack in a sliding manner; a fastening mechanism for fixing the metal pipe is rotatably arranged on the mounting plate; a stamping die base is fixedly arranged on the rack; a through hole used for processing the metal pipe is formed in the middle of the stamping die base; a plurality of stamping die mechanisms used for conducting concave surface processing on the metal pipe are arranged in the stamping die base; and a torsion cylinder is rotationally connected to the side wall of the stamping die base, and the axis of the torsion cylinder and the axis of the through hole are collinear. In the concave surface processing process of a punch, the metal pipe can be driven to intermittently rotate and axially move, automatic adjustment of the processing position is achieved, so that the processed concave structures are evenly distributed, and the product quality is improved; and through the arrangement of a compression spring and an electromagnet, the fastening effect on the metal pipe is good, and the stability of equipment during working is improved.

The invention discloses an auxiliary device for improving rudder blade machining precision. The auxiliary device comprises a cross plate; an extensible alignment device is fixedly connected to the topof the cross plate; a box body is fixedly installed on the extensible alignment device; a rudder blade taper hole machining device is fixedly connected to the top of the box body; an air cylinder isfixedly connected to the inner bottom of the box body; a sliding rod is fixedly connected to the top of the air cylinder; a baffle is fixedly connected to the top of the sliding rod; and extensible rods are slidably connected to four sides of the outer wall of the box body. According to the device, through the mutual matching effect of the box body, the extensible rods, extrusion plates, the sliding rod, a sliding block, fixed plates, compression springs and the air cylinder, the air cylinder push up the sliding rod, the sliding block moves along the sliding rod, then the extensible rods drivethe extrusion plates to move outwards, the extrusion plates clamp the inner walls of rudder blades, inner holes of the rudder blades are rapidly aligned, the extensible alignment device is always located in the center position, and subsequent machining of rudder blade taper holes is facilitated.

The invention discloses a controllable contact type scanning measurement head with constant measurement force, and relates to the field of precision measurement equipment. A clamping head shank (3) and a probe (1) are respectively arranged on the top and at the bottom of the measurement head (2); a data cable (4) and an air pipe joint (5) are arranged on the outer side of the measurement head (2); a base plate (17) is fixed at the bottom inside the measurement head (2) through a lower fixing plate (6); an air guide rail mounting plate (10) is arranged in the middle of the upper side of the base plate (17); two air guide rails (9) are fixed on the air guide rail mounting plate (10) and the base plate (17); hollow pipes (11) are inserted into the air guide rails (9); and a laser scale (14) and the probe (1) are respectively fixed at two ends of the hollow pipes (11) through an upper connection piece (81) and a lower connection piece (82). By the controllable contact type scanning measurement head, the contact type scanning measurement precision is improved, and the processing and measurement efficiency is improved.

The invention discloses a device and a method for carrying out grinding type electric discharge machining on a self-repairing tool electrode. The device mainly comprises a tool electrode and a metal block, wherein the tool electrode comprises a metal matrix and an abrasive particle layer which is fixedly adhered to the surface of the metal matrix through conducting abrasive particles; the tool electrode can rotate along own axis and can move along the surface of a workpiece; the metal block is tightly pressed on the abrasive particle layer of the tool electrode; during use, the tool electrode in rotating is used for grinding the metal block, chippings generated during a grinding process can be adhered to the abrasive particle layer of the tool electrode so as to form a metal adhesion layer, electric discharge machining can be carried out by utilizing the metal adhesion layer, loss of the metal adhesion layer can be caused by a spark effect during a machining process, but the abraded adhesion layer can be replenished and rebuilt through grinding the metal block again by the tool electrode, so that the geometric shape of the tool electrode can be restored in time, the service life of the tool electrode is prolonged, the machining accuracy is increased, and the machining cost is reduced.

The invention discloses a machining method for a front cylinder of a turbine, and relates to the field of machining, in particular to the machining method for the front cylinder of the turbine. The machining method comprises the following steps that the nozzle surface and large surface of a workpiece are roughly turned with a 90-degree indexable turning tool, and a finish turning allowance of 0.3 mm is preserved; a nozzle channel is roughly turned with a super-hard high-speed steel cutter, and a finish turning machining allowance of 0.3 mm is preserved; an inner and outer arc T-shaped channel is roughly turned with a super-hard high-speed steel hook knife, and a fine turning machining allowance of 0.1 mm is preserved; a front steam-sealing circle and a nozzle circle are roughly turned with a 75-degree indexable turning tool, and a fine turning machining allowance of 1 mm is preserved; a front steam-sealing channel is roughly turned with the super-hard high-speed steel cutter; the outer circle of the workpiece is roughly turned with the 75-degree indexable turning tool; the workpiece and a partition slot are roughly machined with a super-hard high-speed alloy tool; and fine turning is performed, and the workpiece is finely turned to a required dimension with the super-hard high-speed alloy tool on a machine tool. The machining method is simple in machining process; the production efficiency and the product qualification rate can be effectively improved; and influence of vibration on the workpiece machining precision during a machining process can be avoided.

A simple fixed-shaft type transmission assembly for a loader belongs to loader components. A first shaft is a gear shaft sleeved with a primary input gear of a solid shaft and a secondary input gear of a hollow shaft, a covering gear is mounted on the solid shaft, and a variable-force device core is mounted on the hollow shaft. A bearing-type overrunning clutch and a sun gear are mounted on a second shaft, a third shaft is an output shaft with a gear in the middle, and a front flange and a rear flange are mounted at two ends of the output shaft. A through hole is arranged in the middle of the covering gear, a cylindrical section extending forwards out of the through hole is arranged at the front end of the primary input gear, an auxiliary bearing and a sealing ring are mounted between the cylindrical section and the through hole, and a support bearing supported in a spindle end seat hole of an engine is further mounted at the front end of the cylindrical section. The second shaft is a stepped integral shaft, the overrunning clutch is mounted at the outer end of the second shaft, a direct-gear driving friction plate is mounted at the inner end of the second shaft, and an external spline matched with an internal spline of the sun gear is arranged in the middle of the second shaft. By the aid of the simple-fixed shaft type transmission assembly for the loader, vibration of the variable-force device core can be greatly relieved, wear of a primary worm gear and a secondary worm gear is avoided, damage of first-gear and reverse-gear parts is avoided, the efficiency of a transmission is improved, and the service life of the transmission is prolonged.

The invention discloses a self-repairing tool electrode turning type discharging processing device and method. The self-repairing tool electrode turning type discharging processing device mainly comprises a tool electrode and a metal block, wherein the tool electrode comprises a metal base body and an abrasive particle layer fixedly bonded on the surface of the metal base body through a conducting abrasive particle bonding agent; the tool electrode and a workpiece can rotate around a self axial line; the tool electrode can approach to or leave away from the workpiece along a direction vertical to the axial line of the workpiece; the metal block is tightly pressed on the abrasive particle layer of the tool electrode. In the use process, the rotating tool electrode grinds the metal block; generated chippings are adhered on the abrasive particle layer of the tool electrode, so that a metal adhesion layer is formed; the discharging processing is performed by using the adhesion layer; the adhesion layer loss can be caused by a spark effect in the processing process; then, the adhesion layer with loss grinds the metal block again through the tool electrode to be supplemented and rebuilt, so that the geometrical shape of the tool electrode is recovered in time; the service life of the tool electrode is unquestionably prolonged; the processing precision is improved; the processing cost is reduced.

The invention discloses a refrigerator stamping part folded edge forming die. The refrigerator stamping part folded edge forming die comprises a fixed die base and a movable die base corresponding to the fixed die base. The fixed die base is arranged below the movable die base. The fixed die base and the movable die base are connected through first telescopic rods. The top of the movable die base is connected with a power device, and the movable die base is driven by the power device to move up and down. Each first telescopic rod is composed of a sleeve and an inner rod and plays a guiding role, wherein the inner rod is sleeved with the sleeve in a connected manner. The sleeves are arranged on the fixed die base, and the inner rods are arranged below the movable die base. A fixed die block is arranged above the fixed die base, a movable die block is arranged below the movable die base, and protruding blocks used for edge folding are arranged on the edges of the two sides of the movable die block. When edge folding is conducted on a refrigerator stamping part, the stamping part is placed on the fixed die block, the power device drives the movable die base to move downwards, the protruding blocks make contact with the stamping part, the movable die base is driven by the power device to continuously conduct downward pressing, and stamping part edge folding is achieved.

The invention discloses a device for machining a key slot in an inner wall of a flange. The device comprises a base, a fixed device, a sliding device and a stop piece, wherein a rail is arranged on the base, the bottom end of the sliding device is arranged on the rail, and can slide relative to the rail, a milling head for machining the key slot and a power device for driving the milling head to work are arranged on the sliding device, the flange is erected on the fixed device, the stop piece is positioned between the fixed device and the sliding device, an open groove for the milling head topenetrate through is formed in the stop piece, and the milling head of the sliding device penetrates through the open groove to machine the flange erected on the fixed device. By the device for machining the key slot in the inner wall of the flange, convenience is brought to re-machining of the key slot in the inner wall of the flange.