Processing technology of friction-resistant four-oil-leaf bearing bush for high-speed gear box

Abstract

The application discloses a processing technology of a friction-resistant four-oil-leaf bearing bush for a high-speed gear box, and belongs to the technical field of bearing bush processing.The application is used for solving the technical problem that the corrosion resistance and friction resistance of the four-oil-leaf bearing bush applied in the high-speed gear box in the prior art need to be further improved.The processing technology of the friction-resistant four-oil-leaf bearing bush for the high-speed gear box comprises the following steps: polyamide-imide, polyaryletherketone, silicon dioxide, polytetrafluoroethylene, molybdenum disulfide and attapulgite are added into a pulverizer, the mixed powder is obtained after being crushed by the pulverizer and being filtered through a 100-mesh screen; the mixed powder is added into a material box of a compression molding device, a driving motor is rotated, one forming die is moved to be directly below a feeding mechanism on the compression molding device, and a valve on a discharging pipe is automatically opened.The application not only effectively improves the friction resistance and corrosion resistance of the four-oil-leaf bearing bush, but also effectively improves the processing speed and production quality of the four-oil-leaf bearing bush.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearing bush processing, in particular to a processing technology of a friction-resistant four-leaf bearing bush for a high-speed gearbox. BACKGROUND

[0002] A bearing bush is a part of a sliding bearing and a shaft neck contact, which is a semicylindrical surface in the shape of a tile and very smooth. The bearing bush has two types of whole and split. The whole bearing bush is usually called a shaft sleeve. The whole bearing bush has two types of no oil groove and oil groove. The bearing bush and the shaft neck are in clearance fit and generally do not rotate with the shaft. The four-leaf bearing bush is a split bearing bush composed of four bearing bushes of the same size, which is mainly used for friction protection of a connecting rod or a crankshaft during high-speed operation.

[0003] The four-leaf bearing bush applied in the high-speed gearbox in the prior art is usually made of metal material or ceramic graphite material. The bearing bush made of ceramic and graphite material has good wear resistance, but is brittle and not resistant to impact, and is not suitable for the high-speed gearbox. The bearing bush made of metal material has large weight, complex shafting structure, and large friction coefficient. Oxides generated by oxidation of a lubricating oil composition in the high-speed gearbox chemically react with the metal bearing bush, causing one or more metal elements on the surface of the bearing bush to peel off to form brittle oxides. The corroded metal is poor in adhesion and strength and is separated from the matrix. The brittle oxide layer on the sliding surface is also peeled off due to fatigue or corrosion. A small number of particles with strong adhesion remain on the surface, causing the surface smoothness of the bearing bush to decrease. The corrosion resistance and friction resistance of the bearing bush need to be further improved.

[0004] In view of the technical defects, a solution is provided. SUMMARY

[0005] The present application aims to provide a processing technology of a friction-resistant four-leaf bearing bush for a high-speed gearbox, which is used to solve the technical problem that the corrosion resistance and friction resistance of the four-leaf bearing bush applied in the high-speed gearbox in the prior art need to be further improved.

[0006] The object of the present application can be achieved by the following technical solution.

[0007] The processing technology of the friction-resistant four-leaf bearing bush for the high-speed gearbox comprises the following steps:

[0008] S1, polyamide-imide, polyaryletherketone, silicon dioxide, polytetrafluoroethylene, molybdenum disulfide, and attapulgite are added to a pulverizer, and after being pulverized by the pulverizer, the mixture is sieved through a 100-mesh screen to obtain a mixed powder;

[0009] S2, the mixed powder is added to the hopper of the compression molding device, the motor is driven to rotate, and one of the molding molds is moved to be directly below the feeding mechanism; the valve on the discharge pipe is automatically opened, the mixed powder in the hopper is injected into the molding mold to fill the molding chamber;

[0010] S3, the motor is driven to rotate, the molding mold filled with the mixed powder in the molding chamber is moved to be directly below the compression mechanism, the coil spring is wound to store energy, the temperature of the molding chamber is increased to 200-220 DEG C, the compression mechanism works, the pressure in the molding chamber is increased to 15-18 MPa, the temperature of the inside of the molding chamber is reduced to 100+ / -10 DEG C, and a plurality of hydraulic cylinders are synchronously contracted;

[0011] S4, the motor is driven to rotate, the coil spring is wound to store energy, the compression molded molding mold is deflected and disengaged from the compression mechanism, and is cooled to room temperature; the motor is driven to rotate, the molding mold is deflected by 180 DEG after feeding, and is reciprocated along the guide groove direction under the action of the coil spring, so that the four oil leaf bushings in the molding mold are reciprocated in the molding chamber.

[0012] S5, the motor is driven to rotate, the coil spring is wound to store energy, and is transmitted through the connecting rod and the transmission ring to move the four oil leaf bushings to the outside of the molding chamber; the motor is driven to rotate, the coil spring is wound to store energy, and when the molding mold is rotated by half, the moving frame moves to the outermost part of the molding mold, the four oil leaf bushings are dropped, and the four oil leaf bushings are obtained.

[0013] S6, the surface of the four oil leaf bushings is polished to obtain the finished four oil leaf bushings.

[0014] Further, the weight ratio of the polyamide-imide, the polyaryletherketone, the silicon dioxide, the polytetrafluoroethylene, the molybdenum disulfide and the attapulgite is 50:35:8:15:4:6.

[0015] Further, the compression molding device comprises an operating plate provided with a boss at the top center, an annular plate movably sleeved outside the boss, a driving mechanism for driving the annular plate to rotate is installed on the operating plate, a plurality of molding molds are installed on the top of the annular plate, the molding molds are matched with the operating plate through a linkage assembly installed on the annular plate, so as to drive the molding molds to reciprocate along the radius direction of the operating plate when the molding molds are moved to the two ends of the annular plate, a vertical cylinder is fixedly connected to the top center of the operating plate, and a feeding mechanism and a compression mechanism matched with the molding molds are installed on the vertical cylinder.

[0016] The inner side of the forming die is provided with an arc-shaped groove horizontally arranged along the length direction thereof, a moving frame is slidingly installed at the inner side of the arc-shaped groove, the moving frame and the arc-shaped groove jointly form a forming chamber, a rectangular groove in communication with the forming chamber is formed at the top of the forming die, and a communication groove in communication with the rectangular groove is formed at each side of the forming die.

[0017] Further, the driving mechanism comprises an inner gear ring fixedly installed at the inner side of the annular plate and a gear wheel I installed on the operation plate and engaged with the inner gear ring, and a driving motor for driving the gear wheel I to rotate is installed at the bottom of the operation plate.

[0018] Further, a plurality of the forming dies are arranged in a ring array with the center of the annular plate as the axis, a plurality of guide grooves are formed at the top of the annular plate, a plurality of guide plates are fixedly connected to the bottom of the plurality of forming dies, the plurality of guide plates respectively extend to the inner side of the plurality of guide grooves and are slidingly connected thereto, and a return spring is fixedly connected to one end of each of the plurality of guide plates close to the boss.

[0019] Further, the linkage assembly comprises a mounting chamber formed in the annular plate and corresponding to the plurality of forming dies, a central shaft is rotatably installed at the inner side of the mounting chamber, a coil spring is installed at the outer part of the central shaft, an annular groove is formed at the top of the operation plate, two half gear rings are symmetrically installed on the inner wall of the annular groove, the bottom of the central shaft extends to the inner side of the annular groove, a gear wheel II cooperated with the two half gear rings is fixedly connected to the bottom of the central shaft, the linkage assembly further comprises a receiving chamber formed at the top of the annular plate, a transmission frame arranged along the width direction of the forming die and a transmission rod cooperated with the transmission frame are installed at the inner side of the receiving chamber, the transmission rod is in Z-shaped structure, one end of the transmission rod extends to the inner side of the transmission frame, the other end of the transmission rod extends to the inner side of the mounting chamber and is in transmission connection with the top of the central shaft through a ratchet wheel.

[0020] Further, the feeding mechanism comprises a box body fixedly connected to the outer part of the vertical cylinder, a material box is slidingly installed at the inner side of the box body, a plurality of connecting springs are installed at both sides of the material box, the plurality of connecting springs are fixedly connected to the inner wall of the box body, a discharge pipe is fixedly connected to the bottom of the material box, and the bottom of the discharge pipe extends to the bottom of the box body and cooperates with the forming die.

[0021] Further, the pressing mechanism comprises a top plate fixedly connected to the outer part of the vertical cylinder, a plurality of hydraulic cylinders are installed at the top of the top plate, a pressing plate is installed at the output end of the plurality of hydraulic cylinders, and a convex plate is fixedly connected to the bottom of the pressing plate.

[0022] Further, the outer sleeve of the vertical cylinder is sleeved with a transmission ring, the transmission ring is an annular structure with one end protruding outward, an annular groove is formed on the outer wall of the transmission ring, a plurality of connecting rods are fixedly connected to one end of the moving frame, and the other end of the connecting rods extends to the inner side of the annular groove and is slidably connected thereto.

[0023] The present application has the following advantages:

[0024] 1、The friction-resistant four-oil-leaf bearing of the high-speed gear box is prepared by mixing and crushing polyamide-imide, polyaryletherketone, silicon dioxide, polytetrafluoroethylene, molybdenum disulfide, and attapulgite, and then being pressed into shape, so that the surface dry friction coefficient reaches 0.03-0.05, effectively improving the friction resistance, and polyamide-imide, polyaryletherketone, and polytetrafluoroethylene all have good high-temperature resistance and corrosion resistance, so that the bearing has good corrosion resistance, can effectively avoid chemical reaction with the oxidation products of the lubricant component to cause the surface smoothness to decrease, prolongs the service life of the bearing, and polyamide-imide, polyaryletherketone, and polytetrafluoroethylene are all high-molecular organic polymers, have good compatibility with the lubricant, and the lubricant can adhere to the outside of the bearing to form an oil film, so that the friction coefficient of the bearing is reduced to 0.001-0.002, effectively improving the friction resistance.

[0025] 2、The friction-resistant four-oil-leaf bearing of the high-speed gear box is prepared by cooperating a forming die, a communication groove, a moving frame, a top plate, a forming die, a pressing mechanism, a feeding mechanism, and a transmission ring, so that when the forming die moves to directly below the feeding mechanism, the discharge pipe of the feeding mechanism can enter the inside of the forming chamber of the forming die, thereby automatically feeding the forming die; the top plate is connected to the forming die through a plurality of restoring springs, so that a compressible space is formed on the inside of the forming chamber, thereby being capable of storing a sufficient amount of mixed powder in the forming chamber; the pressing plate on the pressing mechanism cooperates with the two top plates to form a complete top structure, thereby being capable of pressing the mixed powder in the forming chamber into a bearing with a smooth surface; the moving frame is slidably connected to the arc-shaped groove, and the moving frame, the transmission ring, and the connecting rod cooperate with each other, so that when the forming die moves to a specific position, the moving frame is pushed out to the outside of the forming chamber, thereby achieving automatic discharging of the bearing; the pressing and forming device realizes continuous processing of automatic feeding, pressing and forming, cooling, and automatic discharging during the processing of the bearing powder, thereby effectively improving the processing rate of the four-oil-leaf bearing.

[0026] 3. The friction-resistant four-oil-leaf bearing bush for high-speed gearboxes of the present application, in the preparation process, through the cooperation of the operating plate, the annular plate, the half-tooth ring, the gear two, the coil spring, the transmission rod, and the ratchet wheel, the annular plate can wind the coil spring when rotating, and when the forming die moves to the position directly below the feeding mechanism and away from the feeding mechanism, the gear two and the half-tooth ring cooperated with the two forming dies are driven to rotate under the action of the coil spring, thereby driving the transmission rod to rotate, so as to drive the forming die to reciprocate along the guide groove, and the discharge pipe is inserted into the inside of the forming chamber. At the same time of the reciprocating movement of the forming die, the material box is also reciprocated, so that the mixed powder is uniformly added to the inside of the forming chamber, avoiding the problem that the single-point feeding mode cannot fill the forming chamber with the mixed powder, improving the production quality of the bearing bush, and since the moving frame is connected with the transmission ring through the connecting rod, the relative movement between the moving frame and the forming die makes the four-oil-leaf bearing bush formed in the forming chamber move synchronously in the forming chamber, avoiding the adhesion of the formed four-oil-leaf bearing bush to the inner wall of the forming chamber. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0028] Figure 1 is a perspective view of the pressing and forming device in the present application;

[0029] Figure 2 is a top view of the pressing and forming device in the present application after removing the feeding mechanism and the pressing mechanism;

[0030] Figure 3 is a front view of the pressing and forming device in the present application;

[0031] Figure 4 is a structural view of the forming die in the present application;

[0032] Figure 5 is an enlarged view of position A in the present application; Figure 3

[0033] Figure 6 is a top view of the operating plate, the half-tooth ring, and the gear two in the present application;

[0034] Figure 7 is a partial top view of the annular plate in the present application.

[0035] ​As shown in the figure, 100, operation plate; 101, ring plate; 102, inner tooth ring; 103, gear one; 104, driving motor; 105, vertical cylinder; 200, forming die; 201, arc-shaped groove; 202, communication groove; 203, moving frame; 204, top plate; 205, guide groove; 206, guide plate; 207, return spring; 208, transmission ring; 209, connecting rod; 300, feeding mechanism; 301, box body; 302, material box; 303, connecting spring; 304, discharge pipe; 400, pressing mechanism; 401, top plate; 402, hydraulic cylinder; 403, pressing plate; 404, convex plate; 500, mounting chamber; 501, center shaft; 502, coil spring; 503, annular groove; 504, gear two; 505, half tooth ring; 506, transmission rod; 507, transmission frame. Embodiments

[0036] The technical solutions of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the protection scope of the present application. Embodiment 1

[0037] Please refer to Figure 1 and Figure 4 The embodiment provides a pressing forming device for processing friction-resistant four-oil-leaf bearing bush for high-speed gear box, which comprises an operation plate 100 provided with a boss at the top center, an outer movable sleeve of the boss is provided with a ring plate 101, the operation plate 100 is provided with a driving mechanism for driving the ring plate 101 to rotate, a plurality of forming dies 200 are installed at the top of the ring plate 101, a vertical cylinder 105 is fixedly connected to the top center of the operation plate 100, and a feeding mechanism 300 and a pressing mechanism 400 matched with the forming dies 200 are installed on the vertical cylinder 105.

[0038] The driving mechanism comprises an inner tooth ring 102 fixedly installed on the inner side of the ring plate 101 and a gear one 103 installed on the operation plate 100 and engaged with the inner tooth ring 102, and the bottom of the operation plate 100 is provided with a driving motor 104 for driving the gear one 103 to rotate.

[0039] The feeding mechanism 300 is adjacent to the pressing mechanism 400, the driving motor 104 is a brake motor, the number of the forming die 200 is six, the driving motor 104 drives the gear one 103 to rotate, drives the inner gear ring 102 to rotate, thereby drives the annular plate 101 to rotate, the driving motor 104 is electrically connected with the PLC controller through wires, so that the driving motor 104 drives the annular plate 101 to deflect 60° on the operation plate 100 each time, so that the forming die 200 fed through the feeding mechanism 300 can smoothly enter the directly below of the pressing mechanism 400 when following the annular plate 101 deflecting 60°, thereby the material in the forming die 200 can be pressed and formed. Example 2

[0040] Please refer to Figures 1-4 and Figure 7 , the embodiment provides a kind of friction-resistant four oil leaf bushing for high-speed gearbox is processed with pressing forming device, six forming die 200 is arranged in ring array with the center of annular plate 101 as axis, the top of annular plate 101 is provided with multiple guide grooves 205, the bottom of multiple forming die 200 is all fixed with multiple guide plates 206, multiple guide plates 206 respectively extend to the inside of multiple guide grooves 205 and slidably connect with it, and the end of multiple guide plates 206 close to boss is all fixed with return spring 207.

[0041] The length direction of forming die 200 is parallel with the radial direction of annular plate 101, under the elastic action of multiple guide plates 206 and return spring 207, forming die 200 has the tendency of moving away from vertical cylinder 105, forming die 200 is slidably connected with the top surface of annular plate 101 by guide groove 205, so that forming die 200 can reciprocate along the direction of guide groove 205.

[0042] The inside of forming die 200 is provided with arc-shaped groove 201 arranged horizontally along its length direction, arc-shaped groove 201 is slidably installed with moving frame 203, moving frame 203 and arc-shaped groove 201 form forming chamber, the top of forming die 200 is provided with rectangular groove communicated with forming chamber, the two sides of forming die 200 are provided with communication groove 202 communicated with rectangular groove, the inside of rectangular groove is installed with two top plates 204, two top plates 204 are respectively located on the two sides of communication groove 202.

[0043] The communication grooves 202 are arc-shaped structures, and the six communication grooves 202 are located on a same circle with a same center, the moving frame 203 is composed of two arc-shaped plates matched with the arc-shaped grooves 201 and two connecting plates arranged along the length direction of the forming die 200, accommodating grooves matched with the connecting plates are arranged on the inner walls of the two sides of the arc-shaped grooves 201, a plurality of vertical grooves are arranged on the inner side walls of the rectangular grooves, restoring springs are arranged on the inner sides of the vertical grooves, connecting blocks are fixedly connected to the top portions of the restoring springs, the top portions of the connecting blocks extend to the outside of the vertical grooves and are fixedly connected to the outer walls of the two top plates 204, under the action of the plurality of restoring springs, the plurality of top plates 204 have a tendency to move upward, so that the forming chamber can be opened, the raw materials for forming the four-leaf bush are accommodated in the forming chamber, and heat exchange pipes (not shown in the figure) are arranged on the inner side of the forming die 200, so that the forming die 200 can be heated and cooled, so that the temperature of the forming die 200 can be controlled during the preparation of the four-leaf bush, and the four-leaf bush can be hot-pressed. Example 3

[0044] Please refer to Figure 1 The embodiment provides a pressing forming device for processing a friction-resistant four-leaf bush for a high-speed gear box, and the pressing mechanism 400 comprises a top plate 401 fixedly connected to the outside of the vertical cylinder 105, a plurality of hydraulic cylinders 402 are arranged on the top portion of the top plate 401, a pressing plate 403 is arranged on the output end of the plurality of hydraulic cylinders 402, and a convex plate 404 is fixedly connected to the bottom portion of the pressing plate 403.

[0045] When the forming die 200 moves to the position directly below the pressing mechanism 400, the pressing plate 403 is located directly above the two top plates 204 on the forming die 200, the plurality of hydraulic cylinders 402 are synchronously elongated, the pressing plate 403 is pushed to descend, the convex plate 404 is matched with the communication grooves 202, when the top portion of the pressing plate 403 is attached to the top surface of the two top plates 401, the bottom portion of the convex plate 404 is flush with the bottom portion of the two top plates 401, the plurality of hydraulic cylinders 402 are continuously elongated, and then the pressing plate 403 and the top plate 401 are pushed to descend to apply pressure to the forming chamber, so that the four-leaf bush raw materials in the forming chamber are compressed, the temperature of the forming die 200 is controlled in cooperation with the heat exchange pipes, and the four-leaf bush can be quickly hot-pressed. Example 4

[0046] Please refer to Figure 1 and Figure 3The embodiment provides a pressing forming device for processing friction-resistant four-oil-leaf bearing bush for high-speed gear box, a feeding mechanism 300 comprises a box body 301 fixed outside a vertical cylinder 105, a material box 302 is slidably installed on the inner side of the box body 301, a plurality of connecting springs 303 are installed on the two sides of the material box 302, the connecting springs 303 are fixedly connected with the inner wall of the box body 301, a discharge pipe 304 is fixedly connected to the bottom of the material box 302, and the bottom of the discharge pipe 304 extends to the bottom of the box body 301 and cooperates with the forming die 200.

[0047] A feeding port is formed in the top of the box body 301, a feeding cover is installed on the feeding port, the discharge pipe 304 has an arc suitable for the communication groove 202, so that the forming die 200 is just inserted into the inner side of the forming die 200 when the annular plate 101 rotates to be directly below the feeding mechanism 300, the material box 302 can reciprocate along the direction of the guide plate 206 when the forming die 200 reciprocates along the direction of the guide groove 205, so that the material in the material box 302 is conveyed to the inner side of the forming cavity, the reciprocating forming die 200 can uniformly distribute the material in the inner side of the forming cavity, so that the forming cavity is filled, the connecting springs 303 are obliquely arranged and can stretch the material box 302, the friction between the bottom outer wall of the material box 302 and the bottom inner wall of the box body 301 is reduced, a valve is installed in the inner side of the discharge pipe 304, and the valve is automatically opened when the discharge pipe 304 enters the inner side of the forming die 200. Embodiment 5

[0048] Please refer to Figure 1 , Figure 3 , Figure 5 and Figure 6The embodiment provides a pressing forming device for processing friction-resistant four-oil-leaf bearing bush for high-speed gear box, forming dies 200 are matched with the operation plate 100 through the linkage assembly installed on the annular plate 101, so as to drive the reciprocating movement of the forming dies 200 along the radial direction of the operation plate 100 when the forming dies 200 move to the two ends of the annular plate 101, the linkage assembly comprises installation cavities 500 which are arranged on the annular plate 101 and correspond to the plurality of forming dies 200, a central shaft 501 is rotatably installed on the inner side of the installation cavity 500, a coil spring 502 is installed on the outer side of the central shaft 501, a ring-shaped groove 503 is formed in the top of the operation plate 100, two half-tooth rings 505 are symmetrically installed on the inner wall of the ring-shaped groove 503, the bottom of the central shaft 501 extends to the inner side of the ring-shaped groove 503, and a gear two 504 matched with the two half-tooth rings 505 is fixedly connected to the bottom of the central shaft 501, the linkage assembly further comprises a containing cavity formed in the top of the annular plate 101, a transmission frame 507 arranged along the width direction of the forming die 200 and a transmission rod 506 matched with the transmission frame 507 are installed on the inner side of the containing cavity, the transmission rod 506 is in Z-shaped structure, one end of the transmission rod 506 extends to the inner side of the transmission frame 507, and the other end of the transmission rod 506 extends to the inner side of the installation cavity 500 and is in transmission connection with the top of the central shaft 501 through a ratchet wheel.

[0049] When the annular plate 101 rotates, the plurality of gear twos 504 synchronously rotate with the annular plate 101, the gear two 504 moves relative to the half-tooth ring 505, the gear two 504 rotates, and then the central shaft 501 rotates, so that the coil spring 502 is wound and stored, when one of the forming dies 200 moves to the position directly below the feeding mechanism 300, the gear two 504 on the forming die 200 moves to the position between the two half-tooth rings 505, the gear two 504 is no longer limited by the half-tooth ring 505, under the action of the coil spring 502 and the ratchet wheel, the transmission rod 506 rotates, is driven to rotate through the transmission frame 507, and then drives the reciprocating movement of the forming die 200 along the direction of the guide groove 205, at this time, the gear two 504 below the other forming die 200 which is symmetrical to the feeding mechanism 300 with the vertical cylinder 105 as the symmetry axis moves to the other end of the two half-tooth rings 505, so as to drive the reciprocating movement of the forming die 200 along the direction of the guide groove 205, if the moving frame 203 is relatively static relative to the annular plate 101, then the moving frame 203 moves relative to the forming die 200, so as to promote the reciprocating movement of the four-oil-leaf bearing bush formed in the forming cavity and separate the four-oil-leaf bearing bush from the inner wall of the forming cavity, avoid the adhesion of the four-oil-leaf bearing bush to the inner wall of the forming cavity, and facilitate the taking out of the four-oil-leaf bearing bush from the forming die 200. Embodiment 6

[0050] Please refer to Figures 1-3The embodiment provides a pressing forming device for processing friction-resistant four-oil-leaf bearing bush for high-speed gear box, a transmission ring 208 is sleeved outside the vertical cylinder 105, the transmission ring 208 is an annular structure with one end protruding outward, a plurality of annular grooves are formed in the outer wall of the transmission ring 208, a plurality of connecting rods 209 are fixedly connected to one end of the plurality of moving frames 203 which are close to each other, and one end of the plurality of connecting rods 209 away from the moving frame 203 extends to the inside of the annular groove and is slidably connected with the annular groove.

[0051] The annular plate 101 drives the plurality of forming molds 200 to synchronously rotate, when the forming mold 200 moves to the front face close to the operation plate 100, at this moment, the plurality of moving frames 203 are located on the inside of the arc-shaped groove 201 through the transmission of the connecting rod 209, and when the annular plate 101 continues to rotate, the connecting rod 209 enters the protruding part on the transmission ring 208, the moving frame 203 is driven to move away from the vertical cylinder 105 through the transmission of the connecting rod 209, and when the forming mold moves to the back face of the operation plate 100, the frame-shaped section of the moving frame 203 is completely pushed out to the outside of the forming chamber, the formed four-oil-leaf bearing bush is separated from the moving frame 203 and falls off under the action of gravity, and a conveying belt is arranged below the four-oil-leaf bearing bush, so that the four-oil-leaf bearing bush is conveniently transferred to the next processing procedure. Embodiment 7

[0052] Please refer to Figures 1-7 The embodiment provides a processing technology of friction-resistant four-oil-leaf bearing bush for high-speed gear box.

[0053] S1, polyamide-imide, polyaryletherketone, silicon dioxide, polytetrafluoroethylene, molybdenum disulfide and attapulgite are added into a pulverizer in a weight ratio of 50:35:8:15:4:6, the mixture is pulverized by the pulverizer, and then the mixture is filtered through a 100-mesh screen to obtain mixed powder;

[0054] S2, the mixed powder is added into the material box 302 of the pressing forming device, the driving motor 104 is driven to rotate, the annular plate 101 is deflected by 60°, one of the forming molds 200 moves to the position directly below the feeding mechanism 300, the valve on the discharge pipe 304 is automatically opened, the gear two 504 below the forming mold 200 is separated from the half-tooth ring 505, the coiled spring 502 after force accumulation drives the forming mold 200 to reciprocate along the guide groove 205, the mixed powder in the material box 302 is injected into the inside of the forming chamber, and when the forming mold 200 stops moving, the valve on the discharge pipe 304 is closed.

[0055] S3, the driving motor 104 rotates, the driving ring plate 101 deflects 60 DEG, the forming cavity is filled with the mixed powder forming mold 200 and moves to the just below the pressing mechanism 400, the coil spring 502 is wound and accumulates force, the temperature of the forming cavity is increased to 200-220 DEG C, a plurality of hydraulic cylinders 402 are synchronously elongated, the pressing plate 403 is pushed to move downwards, the convex plate 404 moves to the inside of the communication groove 202, the bottom of the pressing plate 403 and the top of the two top plates 401 abut, the two top plates 401 are pushed to descend synchronously, the pressure in the forming cavity is increased to 15-18 MPa, the heat preservation and pressure maintaining treatment is 8-10 min, the temperature of the inside of the forming cavity is reduced to 100 DEG C plus or minus 10 DEG C, and a plurality of hydraulic cylinders 402 are synchronously contracted;

[0056] S4, the driving motor 104 rotates, the driving ring plate 101 deflects 60 DEG, the coil spring 502 is wound and accumulates force, the forming mold 200 after pressing is deflected and separated from the pressing mechanism 400, and is cooled to room temperature, the driving motor 104 rotates, the driving ring plate 101 deflects 60 DEG, the forming mold 200 completes 180 DEG deflection, the gear two 504 below the forming mold 200 enters between the two half tooth rings 505, under the action of the coil spring 502, the forming mold 200 is driven to reciprocate along the direction of the guide groove 205, so that the four oil leaf bearing bushings in the forming mold 200 reciprocate in the forming cavity, and adhesion of the four oil leaf bearing bushings in the forming cavity is avoided;

[0057] S5, the driving motor 104 rotates, the driving ring plate 101 deflects 60 DEG, the coil spring 502 is wound and accumulates force, the four oil leaf bearing bushings are pushed to move to the outside of the forming cavity through the connection rod 209 and the transmission ring 208, the driving motor 104 rotates, the driving ring plate 101 deflects 60 DEG, the coil spring 502 is wound and accumulates force, when the forming mold 200 rotates 30 DEG, the moving frame 203 moves to the outermost part of the forming mold 200, the four oil leaf bearing bushings are dropped, and the four oil leaf bearing bushing crude products are obtained;

[0058] S6, the surface of the four oil leaf bearing bushing crude products is polished, so that the surface roughness is reduced to below Ra0.1, and the four oil leaf bearing bushing finished products are obtained.

[0059] The above content is only an example and description of the structure of the application, and those skilled in the art can make various modifications or supplements or adopt similar ways to replace the described specific embodiments, as long as the modifications or supplements do not deviate from the structure of the application or exceed the scope defined by the present application, and belong to the protection scope of the application.

[0060] In the description of the specification, reference to "one embodiment", "an example", "a specific example" or the like means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. The appearances of the phrases "in one embodiment", "an example", "a specific example" or the like in various places in the specification are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0061] The preferred embodiments of the application disclosed above are only to help explain the application. The preferred embodiments do not describe all the details of the application and limit the application to the specific embodiments. Obviously, many modifications and variations can be made in light of the contents of the specification. The specification selects and specifically describes these embodiments in order to better explain the principles and practical application of the application, so that those skilled in the art can well understand and utilize the application. The application is limited only by the claims and their full scope and equivalents.

Claims

1. The processing technology of friction-resistant four-oil-leaf bearing for high-speed gearbox is characterized by: The following steps are involved: S1, adding polyamide-imide, polyaryletherketone, silicon dioxide, polytetrafluoroethylene, molybdenum disulfide, and attapulgite into a grinder, grinding them into powder, and passing them through a 100-mesh sieve to obtain a mixed powder; S2, adding the mixed powder into the material box (302) of the pressing and molding device, driving the motor (104) to rotate, wherein a molding die (200) moves to the bottom of the feeding mechanism (300), the valve on the discharge pipe (304) automatically opens, and the mixed powder in the material box (302) is injected into the molding die (200) to fill the molding cavity; S3, the driving motor (104) rotates, the molding die (200) filled with the mixed powder in the molding chamber moves to the bottom of the pressing mechanism (400), the coil spring (502) reels and stores force, the molding chamber temperature rises to 200-220°C, the pressing mechanism (400) operates, the molding chamber pressure rises to 15-18 MPa, the heat and pressure are kept for 8-10 minutes, the inner temperature of the molding chamber drops to 100±10°C, and the multiple hydraulic cylinders (402) contract synchronously; S4, the driving motor (104) rotates, the coil spring (502) winds up and stores force, the molding die (200) after pressing and forming is deflected and separated from the pressing mechanism (400), cooled to room temperature, the driving motor (104) rotates, the molding die (200) completes 180° deflection after loading, and under the action of the coil spring (502), the molding die (200) is driven to reciprocate along the direction of the guide groove (205), so that the four-oil blade bearing in the molding die (200) reciprocates in the molding chamber; S5, the driving motor (104) rotates, the coil spring (502) reels and stores force, and is transmitted through the connecting rod (209) and the transmission ring (208), pushing the four-oil-leaf bearing to move outside the molding chamber, the driving motor (104) rotates, the coil spring (502) reels and stores force, and when the molding die (200) rotates halfway, the moving frame (203) moves to the outermost part of the molding die (200), and the four-oil-leaf bearing falls off, thereby obtaining a rough four-oil-leaf bearing; S6. Grinding the surface of the rough four-oil-lobe bearing bush to obtain a finished four-oil-lobe bearing bush; The pressing and forming device comprises an operating plate (100) with a boss provided at the top center, an annular plate (101) being provided on the outer movable sleeve of the boss, a driving mechanism for driving the annular plate (101) to rotate being installed on the operating plate (100), a plurality of forming dies (200) being installed on the top of the annular plate (101), the forming dies (200) cooperating with the operating plate (100) via a linkage assembly installed on the annular plate (101), so as to drive the forming dies (200) to move to both ends of the annular plate (101) and drive them to reciprocate along the radial direction of the operating plate (100), a vertical cylinder (105) being fixedly connected to the top center of the operating plate (100), and a feeding mechanism (300) and a pressing mechanism (400) cooperating with the forming dies (200) being installed on the vertical cylinder (105); The inner side of the molding die (200) is provided with an arc-shaped groove (201) arranged horizontally along its length direction, a movable frame (203) is slidably installed on the inner side of the arc-shaped groove (201), and the movable frame (203) and the arc-shaped groove (201) together form a molding chamber, a rectangular groove connected to the molding chamber is provided on the top of the molding die (200), and connecting grooves (202) connected to the rectangular groove are provided on both sides of the molding die (200), and two top plates (204) are installed on the inner side of the rectangular groove, and the two top plates (204) are respectively located on both sides of the connecting groove (202); The linkage assembly includes an installation chamber (500) provided on an annular plate (101) and corresponding to a plurality of molding dies (200), a central shaft (501) being rotatably installed on the inner side of the installation chamber (500), a coil spring (502) being installed on the outer side of the central shaft (501), an annular groove (503) being provided on the top of the operating plate (100), two half-toothed rings (505) being symmetrically installed on the inner wall of the annular groove (503), the bottom of the central shaft (501) extending to the inner side of the annular groove (503), and the bottom of the central shaft (501) being fixedly connected to the two half-toothed rings (505). The gear ring (505) cooperates with the gear second (504), and the linkage assembly further includes a receiving chamber opened on the top of the annular plate (101), and a transmission frame (507) arranged along the width direction of the forming mold (200) and a transmission rod (506) that cooperates with the transmission frame (507) are installed on the inner side of the receiving chamber, and the transmission rod (506) is a Z-shaped structure, one end of the transmission rod (506) extends to the inner side of the transmission frame (507), and the other end of the transmission rod (506) extends to the inner side of the installation chamber (500) and is connected to the top of the central shaft (501) through a ratchet. The outer portion of the vertical cylinder (105) is sleeved with a transmission ring (208), which is an annular structure with one end protruding outward. An annular groove is provided on the outer wall of the transmission ring (208), and the ends of the plurality of movable frames (203) close to each other are fixedly connected with connecting rods (209), and the ends of the plurality of connecting rods (209) away from the movable frames (203) extend to the inner side of the annular groove and are slidably connected thereto.

2. The processing technology of the friction-resistant four-oil-leaf bearing for high-speed gearbox according to claim 1 is characterized in that: The weight ratio of the polyamide-imide, polyaryletherketone, silicon dioxide, polytetrafluoroethylene, molybdenum disulfide and attapulgite is 50:35:8:15:4:

6.

3. The processing technology of the friction-resistant four-oil-leaf bearing for high-speed gearbox according to claim 1 is characterized in that: The driving mechanism comprises an inner gear ring (102) fixedly mounted on the inner side of the annular plate (101) and a gear 1 (103) mounted on the operating plate (100) and meshing with the inner gear ring (102). A driving motor (104) for driving the gear 1 (103) to rotate is mounted at the bottom of the operating plate (100).

4. The processing technology of the friction-resistant four-oil-blade bearing for high-speed gearbox according to claim 1 is characterized in that: The plurality of forming dies (200) are arranged in a circular array with the center of the annular plate (101) as the axis, the top of the annular plate (101) is provided with a plurality of guide grooves (205), the bottoms of the plurality of forming dies (200) are fixedly connected with a plurality of guide plates (206), the plurality of guide plates (206) respectively extend to the inner sides of the plurality of guide grooves (205) and are slidably connected thereto, and the plurality of guide plates (206) are fixedly connected with a return spring (207) at one end close to the boss.

5. The processing technology of the friction-resistant four-oil-leaf bearing for high-speed gearbox according to claim 1 is characterized in that: The feeding mechanism (300) includes a box body (301) fixedly connected to the outside of the vertical cylinder (105), a material box (302) is slidably installed on the inner side of the box body (301), a plurality of connecting springs (303) are installed on both sides of the material box (302), and the plurality of connecting springs (303) are fixedly connected to the inner wall of the box body (301), and a discharge pipe (304) is fixedly connected to the bottom of the material box (302), and the bottom of the discharge pipe (304) extends to the bottom of the box body (301) and cooperates with the forming mold (200).

6. The processing technology of the friction-resistant four-oil-lobe bearing for high-speed gearbox according to claim 1 is characterized in that: The pressing mechanism (400) includes a top plate (401) fixedly connected to the outside of the vertical cylinder (105), a plurality of hydraulic cylinders (402) are installed on the top of the top plate (401), a pressing plate (403) is installed at the output end of the plurality of hydraulic cylinders (402), and a convex plate (404) is fixedly connected to the bottom of the pressing plate (403).

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