CN116393698A

CN116393698A - Metal powder metallurgy gear processing die

Info

Publication number: CN116393698A
Application number: CN202310666775.1A
Authority: CN
Inventors: 刘振杰
Original assignee: Harbin University
Current assignee: Harbin University
Priority date: 2023-06-07
Filing date: 2023-06-07
Publication date: 2023-07-07

Abstract

The invention belongs to the technical field of powder metallurgy, and discloses a metal powder metallurgy gear processing die and a frame; a mold assembly for providing a plurality of mold types; the circulation assembly is used for controlling the circulation switching processing of the die assembly; the feeding and discharging assembly is used for providing metal powder into the die assembly and extruding the gear molded in the die assembly; and (5) pressing the assembly. This metal powder metallurgy gear mold processing, the mode of combining the rotation through a plurality of die sleeves that set up in the mould subassembly of setting carries out feeding and compression molding, can process a plurality of different grade type powder metallurgy gears at control whole device, improve equipment's whole suitability, avoided because the machining efficiency that constantly changes the mould and lead to reduces, operating personnel's intensity of labour grow, and utilize the rotatory automatic feeding of circulation of a plurality of die sleeves and ejection of compact, the machining efficiency of improvement powder metallurgy that can be further, operating personnel's working strength is reduced.

Description

Metal powder metallurgy gear processing die

Technical Field

The invention relates to the technical field of powder metallurgy, in particular to a metal powder metallurgy gear processing die.

Background

The gear is manufactured by the powder metallurgy technology and needs a plurality of working procedures such as powder preparation, molding, sintering, post-treatment and the like, wherein the molding working procedure is to put powder materials into a mold for compression molding under certain pressure, and the gear mold is technically improved along with the rapid development of scientific technology.

At present, when the powder metallurgy gear is processed, gears with different specifications are required to be processed in many times due to different gear varieties, and the existing powder metallurgy gear die is basically a single body, so that the time and the labor are consumed when the die is replaced and is required to be manually disassembled and installed. Meanwhile, the existing processing die basically pours metal powder into a die cavity, and presses the powder by means of the pressure of a hydraulic press, but when the powder is poured into the die cavity, gaps among the powder are different, and the gaps are reduced by means of the pressure pressing, uneven powder is easy to cause uneven stress and low quality of a formed gear when pressed, so that the metal powder metallurgy gear processing die is provided to solve the problems.

Disclosure of Invention

(one) solving the technical problems

Aiming at the defects of the prior art, the invention provides a metal powder metallurgy gear processing die, which solves the problems that gears with different specifications cannot be synchronously processed in the prior art, has larger limitation, and needs operators to change the die at intervals, thereby wasting time and labor; meanwhile, in the prior art, uniformity of metal powder in a die cavity cannot be guaranteed during lamination, so that the problem of uneven stress and lower quality of a gear after lamination molding is caused.

(II) technical scheme

In order to achieve the above purpose, the present invention provides the following technical solutions: a metal powder metallurgy gear processing die and a frame; a mold assembly for providing a plurality of mold types; the circulation assembly is used for controlling the circulation switching processing of the die assembly; the feeding and discharging assembly is used for providing metal powder into the die assembly and extruding the gear molded in the die assembly; and the pressing assembly is used for providing pressure to press and mold the metal powder in the die assembly.

Preferably, the die assembly comprises an upper rotary table and a lower rotary table, a plurality of die sleeves are arranged between the upper rotary table and the lower rotary table, and a fixed disc is arranged at the bottom of the lower rotary table.

Preferably, the fixed disk is fixedly provided with a residual fluted disc, the die sleeve is provided with a fixed fluted disc meshed with the residual fluted disc, the lower rotary disk is provided with a spring piece, the spring piece is provided with a connecting spring, and one end of the connecting spring is connected with the die sleeve.

Preferably, a fixed sleeve is arranged on the residual fluted disc, two elastic sheets are connected to the fixed sleeve, one end of each elastic sheet is connected with a knocking ball, the knocking ball is in contact with the surface of the die sleeve, and a discharge hole is formed in the bottom of the fixed disc.

Preferably, the circulating assembly comprises a rotating shaft, a first cross and a second cross are arranged on the rotating shaft, a plurality of upper pressing dies are arranged on the first cross, a plurality of cleaning discs are arranged on the second cross, the upper pressing dies and the cleaning discs are located above the die sleeve, a swinging shaft is connected to the rotating shaft, a positioning disc is movably connected to the surface of the swinging shaft, a rotating shaft is connected to the positioning disc in a sliding mode through a key groove, the rotating shaft is connected with an upper rotating disc through a supporting rod, compression springs are arranged below the positioning disc, limiting sliding blocks are connected to two ends of the rotating shaft, fixed sliding rods are connected to the limiting sliding blocks in a sliding mode, and the fixed sliding rods are arranged inside the machine frame.

Preferably, the rotary shaft is provided with a clamping device, the clamping device comprises a connecting sheet, one side of the connecting sheet is connected with a limiting sliding block, an inserting shaft is connected to the connecting sheet in a sliding mode, a supporting spring is sleeved on the inserting shaft, one end of the supporting spring is connected with the inserting shaft, the other end of the supporting spring is connected with the connecting sheet, and a plurality of V-shaped grooves matched with the inserting shaft are formed in the rotary shaft.

Preferably, the rotary shaft is provided with a positioning and rotating device, the positioning and rotating device comprises a fixing frame, an intermediate gear is connected to the fixing frame, a sliding rack is connected to the fixing frame in a sliding mode, the sliding rack is meshed with the intermediate gear in a mutual mode, the bottom of the sliding rack is rotationally connected with a push rod, a baffle is arranged above the push rod, the baffle is connected to the sliding rack, an intermediate spring is connected to the push rod, the top of the intermediate spring is connected with the sliding rack, and a plurality of right-angle grooves are formed in the rotary shaft.

Preferably, the pressing assembly is a hydraulic cylinder, and a tooth is arranged on an output shaft of the hydraulic cylinder and is meshed with the intermediate gear.

Preferably, the feeding and discharging assembly comprises a feed box, a discharging sleeve is communicated with the bottom of the feed box, a connecting shaft is rotationally connected to the discharging sleeve, one end of the connecting shaft is connected with a blade, the other end of the connecting shaft is connected with a repeated gear, a support frame is meshed with the repeated gear, the support frame is connected to a rotating shaft, a limiting rod is connected to the support frame, and the limiting rod is slidably connected to the feed box.

Preferably, the support frame is arranged on the support frame, a discharging pressing rod is arranged at the bottom of the support frame, and the discharging pressing rod is positioned above the discharging hole.

(III) beneficial effects

Compared with the prior art, the invention provides a metal powder metallurgy gear processing die, which has the following beneficial effects:

1. this metal powder metallurgy gear mold processing, the mode of combining the rotation through a plurality of die sleeves that set up in the mould subassembly of setting carries out feeding and compression molding, can process a plurality of different grade type powder metallurgy gears at control whole device, improve equipment's whole suitability, avoided because the machining efficiency that constantly changes the mould and lead to reduces, operating personnel's intensity of labour grow, and utilize the rotatory automatic feeding of circulation of a plurality of die sleeves and ejection of compact, the machining efficiency of improvement powder metallurgy that can be further, operating personnel's working strength is reduced.

2. This metal powder metallurgy gear mold processing, through the business turn over material subassembly that sets up, can realize turning over the material to metal powder when feeding, the degree of consistency when improving the feeding, and when the die sleeve rotates, utilize the partial engagement of fixed fluted disc and incomplete fluted disc, can drive the die sleeve and rotate, after breaking away from the tooth, will pull the reset through the elasticity of connecting spring, realize shaking about to the die sleeve, thereby shake the inside metal powder of die sleeve, make it more even, reduce the clearance between the powder, and utilize the elasticity drive of shell fragment to strike the ball and strike on the die sleeve, realize beating and the both-way effect of shake, guarantee the homogeneity degree of inside metal powder, improve the quality after the pressfitting of whole powder gear, improve inside atress degree of consistency, and improve the atress homogeneity degree of gear after the shaping.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a metal powder metallurgy gear processing die according to the present invention;

FIG. 2 is a schematic diagram of a mold assembly of a metal powder metallurgy gear processing mold according to the present invention;

FIG. 3 is a schematic view of the bottom surface of a mold assembly of a metal powder metallurgy gear processing mold according to the present invention;

FIG. 4 is a schematic view of a circulation assembly of a metal powder metallurgy gear processing die according to the present invention;

FIG. 5 is a schematic diagram of a clamping device of a metal powder metallurgy gear processing die according to the present invention;

FIG. 6 is a schematic diagram of a positioning and rotating device of a metal powder metallurgy gear processing die according to the present invention;

FIG. 7 is a schematic diagram of a connection structure of a rotating shaft of a metal powder metallurgy gear processing mold according to the present invention;

fig. 8 is a schematic diagram of a feeding and discharging assembly of a metal powder metallurgy gear processing die provided by the invention.

In the figure: 1. a frame; 2. a mold assembly; 201. an upper turntable; 202. a die sleeve; 203. a lower turntable; 204. a fixed plate; 205. a fixed sleeve; 206. a spring plate; 207. striking a ball; 208. fixing a fluted disc; 209. a connecting spring; 210. a spring piece; 211. a residual fluted disc; 212. a discharge port; 3. a circulation assembly; 301. a rotation shaft; 3011. a right angle slot; 3012. a V-shaped groove; 302. a first cross; 303. performing upper pressing; 304. a pendulum shaft; 305. positioning a rotating device; 3051. an intermediate gear; 3052. a fixing frame; 3053. a sliding rack; 3054. a push rod; 3055. a middle spring; 3056. a baffle; 306. a positioning plate; 307. a rotating shaft; 308. a compression spring; 309. a support rod; 310. a limit sliding block; 311. fixing the slide bar; 312. a return spring; 313. a second bracket; 314. cleaning the disc; 315. a connecting sheet; 316. inserting a shaft; 317. a support spring; 4. a feeding and discharging assembly; 401. a feed box; 402. a discharging sleeve; 403. a blade; 404. a connecting shaft; 405. a repeating gear; 406. a support frame; 407. a limit rod; 408. a discharging compression bar; 5. and (5) pressing the assembly.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-8, a metal powder metallurgy gear processing mold comprises a frame 1, wherein the whole pressing assembly 5 is arranged above the frame 1, and the pressing assembly 5 is a hydraulic cylinder in the embodiment, and the powder is pressed and shaped by using the pressure of the hydraulic cylinder.

In this embodiment, referring to fig. 2, a mold assembly 2 is used to provide multiple types of molds; the die assembly 2 comprises an upper rotary table 201 and a lower rotary table 203, a plurality of die sleeves 202 are arranged between the upper rotary table 201 and the lower rotary table 203, and the die sleeves 202 are arranged because the types of processed products are improved in consideration of diversified processing, and the intermittent rotation of the die sleeves 202 is utilized to realize the processing and forming of various types of gears, so that the universality of equipment is improved, and the reduction of processing efficiency caused by repeated die replacement is avoided. The bottom of the lower turntable 203 is provided with a fixed disk 204. The fixed disk 204 is connected with the bottom of the frame 1 to play a role of bearing, and the whole frame 1 is also provided with a base which is positioned below the pressing assembly 5 and is in contact with the bottom surface, because the whole fixed disk 204 is stressed greatly, in order to prevent pressing deformation of the whole fixed disk 204, the base can bear pressing force pressed down by the hydraulic cylinder and transmit the pressing force to the bottom surface, so that deformation of the fixed disk 204 is avoided.

Further, referring to fig. 2, a dummy tooth plate 211 is fixedly disposed on the fixing plate 204, a fixing tooth plate 208 meshed with the dummy tooth plate 211 is disposed on the die sleeve 202, a spring plate 210 is mounted on the lower rotating plate 203, a connecting spring 209 is disposed on the spring plate 210, and one end of the connecting spring 209 is connected with the die sleeve 202. When the die assembly 2 rotates, the fixed fluted disc 208 on the die sleeve 202 is driven to mesh with the residual fluted disc 211 to drive the die sleeve 202 to rotate by a small part of angles, and then when the die sleeve rotates, the fixed fluted disc 208 on the die sleeve 202 is separated from the residual fluted disc 211, and the die sleeve 202 is pulled by the connecting spring 209, so that the die sleeve 202 is driven to turn over and reset, the die sleeve 202 is rotated left and right, the internal metal powder is uniformly shaken, the uniformity of the internal powder is controlled, and the quality after lamination is ensured.

Still further, referring to fig. 2-3, a fixed sleeve 205 is disposed on the residual fluted disc 211, two elastic sheets 206 are connected to the fixed sleeve 205, one end of each elastic sheet 206 is connected to a striking ball 207, the striking ball 207 contacts with the surface of the die sleeve 202, when the die sleeve 202 rotates, the elastic sheets 206 are driven to interfere and squeeze, when the fed die sleeve 202 rotates, the elastic sheets 206 are driven to deform, when the die sleeve 202 rotates and drives the elastic sheets 206 to deform to the limit, the elastic sheets 206 scratch the surface of the die sleeve 202 at the moment, and the impact ball 207 is directly struck on the die sleeve 202 of the next feeding by utilizing the self elastic force, so that the flatness and uniformity of internal metal powder are improved. A discharge port 212 is formed in the bottom of the fixed disk 204. And the discharging hole 212 is a channel for discharging the gear formed after pressing.

In addition, referring to fig. 4 to 7, a circulation assembly 3 is used for controlling the circulation switching processing of the mold assembly 2;

referring to fig. 4, the circulation assembly 3 includes a rotation shaft 301, a first cross 302 and a second cross 313 are mounted on the rotation shaft 301, a plurality of upper pressing dies 303 and cleaning discs 314 are respectively disposed on the first cross 302 and the second cross 313, each die sleeve 202 corresponds to one upper pressing die 303, and the cleaning discs 314 slide and clean the inside of the die cavity, so that possible adhering powder is cleaned out, the consistency of each press forming is ensured, and the difference of gear forming after press forming is reduced. The upper pressing die 303 and the cleaning disc 314 are both located above the die sleeve 202, the rotating shaft 301 is connected with the swinging shaft 304, the surface of the swinging shaft 304 is movably connected with the positioning disc 306, the positioning disc 306 is slidably connected with the rotating shaft 307 through a key slot, the rotating shaft 307 is connected with the upper rotating disc 201 through a supporting rod 309, when the rotating shaft 301 rotates, the swinging shaft 304 is driven to rotate, the swinging shaft 304 slides on a pin slot on the positioning disc 306 by utilizing a pin shaft above the swinging shaft 304, please refer to fig. 7, the positioning disc 306 is driven to turn over by 90 degrees, and when the positioning disc 306 rotates, the rotating shaft 307 is connected with the rotating shaft 307 through the key slot, the rotating shaft 307 is driven to synchronously rotate at the moment, and the rotating shaft 307 rotates through the supporting rod 309, so that the other group of die sleeve 202 on the die assembly 2 is controlled to move and rotate to the lower part of the hydraulic cylinder. A compression spring 308 is disposed below the positioning disc 306, where the compression spring 308 is configured to lift and reset the positioning disc 306, and because the entire rotation shaft 301 can move downward, the rotation shaft 301 moves downward to synchronously drive the positioning disc 306 to move downward and compress the compression spring 308, so that the positioning disc 306 is ensured to move downward. Two ends of the rotating shaft 301 are connected with limiting sliding blocks 310, the limiting sliding blocks 310 are connected with fixed sliding rods 311 in a sliding mode, the fixed sliding rods 311 are arranged in the frame 1, and reset springs 312 are sleeved on the surfaces of the fixed sliding rods 311. Since the lifting and resetting of the whole rotation shaft 301 are considered, the reset springs 312 are provided, and after the hydraulic cylinder is lifted, the two limit sliders 310 are pushed by the elastic force of the reset springs 312 to lift and reset, and the next pressing process is waited.

In addition, referring to fig. 4-5, a clamping device is disposed on the rotating shaft 301, and the clamping device mainly ensures that the rotating shaft 301 is at a standard position every time, if a deviation occurs, the whole upper die 303 will interfere with the die sleeve 202 in a pressing manner, so that the upper die 303 directly acts on the teeth or the upper turntable 201 in a pressing manner, and the pressing is invalid and cannot accurately enter the die cavity. The clamping device comprises a connecting sheet 315, one side of the connecting sheet 315 is connected with a limit sliding block 310, an inserting shaft 316 is connected onto the connecting sheet 315 in a sliding manner, a supporting spring 317 is sleeved on the inserting shaft 316, one end of the supporting spring 317 is connected with the inserting shaft 316, the other end of the supporting spring 317 is connected with the connecting sheet 315, and a plurality of V-shaped grooves 3012 matched with the inserting shaft 316 are arranged on the rotating shaft 301, so that when the rotating shaft 301 rotates, the inserting shaft 316 in the V-shaped grooves 3012 is driven to move upwards, the supporting spring 317 is compressed, when the rotating shaft rotates for 90 degrees, the inserting shaft 316 is reinserted into the second group of V-shaped grooves 3012, and the rotating angle of the rotating shaft 301 is ensured to be temporarily fixed at a 90-degree position every time, so that normal and stable pressing operation is ensured.

It should be noted that, referring to fig. 6, a positioning and rotating device 305 is disposed on the rotating shaft 301, the positioning and rotating device 305 includes a fixing frame 3052, an intermediate gear 3051 is connected to the fixing frame 3052, the direction of force can be changed by using the arrangement of the intermediate gear 3051, when the hydraulic cylinder moves down, the sliding rack 3053 will be controlled to move up, and when the hydraulic cylinder moves up, the sliding rack 3053 will be driven to move up. The power of the hydraulic cylinder moving up is used to drive the rotation replacement of the upper die 303 and the rotation replacement of the die sleeve 202 at the same time, and the metal powder is directly pressed and formed during the pressing operation. The sliding rack 3053 is slidably connected to the fixing frame 3052, the bottom of the sliding rack 3053, which is meshed with the intermediate gear 3051, is rotatably connected with the push rod 3054, after the upward moving process, the push rod 3054 contacts with the rotating shaft 301, is blocked by the rotating shaft 301, drives the push rod 3054 to rotate to give way, and after moving to the upper part of the rotating shaft 301, is pulled by the spring of the intermediate spring 3055, and drives the push rod 3054 to reset to a horizontal state. The catch 3054 is provided with above the push rod 3054, the catch 3056 is connected on the slip rack 3053, be connected with intermediate spring 3055 on the push rod 3054, the top and the slip rack 3053 of intermediate spring 3055 are connected, be provided with a plurality of right angle grooves 3011 on the rotation axis 301, when the pneumatic cylinder resets and moves up, at this moment, the pneumatic cylinder moves up and drives the upset of intermediate gear 3051, and then drive the slip rack 3053 and slide from top to bottom at mount 3052, when sliding down, at this moment push rod 3054 will contact with right angle groove 3011 on the rotation axis 301, and then continue to move down and drive the rotation of rotation axis 301, because the catch 3056 has restricted the rotation of push rod 3054 when moving down, so will drive the rotation of rotation axis 301.

It should be noted that, the feeding and discharging assembly 4 is used for providing metal powder into the die assembly 2 and extruding the gear formed in the die assembly 2;

referring to fig. 8, the feeding and discharging assembly 4 includes a feed box 401, and a discharge sleeve 402 is connected to the bottom of the feed box 401, and metal powder is automatically poured into the die cavity of the die sleeve 202 from the position of the discharge sleeve 402 and filled. The discharging sleeve 402 is rotationally connected with the connecting shaft 404, one end of the connecting shaft 404 is connected with the blade 403, the other end of the connecting shaft 404 is connected with the repeated gear 405, the repeated gear 405 is meshed with the supporting frame 406, the supporting frame 406 is connected to the rotating shaft 301, the supporting frame 406 is connected with the limiting rod 407, the limiting rod 407 is slidingly connected to the material box 401, the supporting frame 406 is driven to move downwards in the whole downward moving process of the rotating shaft 301, one side of the supporting frame 406 is meshed with the repeated gear 405, so that the repeated gear 405 is driven to rotate in a positive and negative rotation mode when the supporting frame 406 slides upwards and downwards, and then the connecting shaft 404 is used for driving downflowing metal powder inside the material box 401 to stir, so that the metal powder entering the die sleeve 202 is more loose and uniform.

Further, referring to fig. 8, a discharging pressing rod 408 is disposed at the bottom of the supporting frame 406, the discharging pressing rod 408 is located above the discharging hole 212, when the discharging pressing rod 408 disposed at the other side of the supporting frame 406 moves down, the discharging pressing rod 408 enters the other die sleeve 202, the formed gear is pushed out from the position of the discharging hole 212, discharging is achieved, and when the discharging pressing rod 408 moves down, the formed gear is driven to be pushed out from the position of the discharging hole 212, so that discharging is achieved.

The electrical components are all connected with an external main controller and 220V mains supply, and the main controller can be conventional known equipment for controlling a computer and the like.

The working principle is that the operation of the pressing assembly 5 is controlled firstly, that is, the pressing down of the hydraulic cylinder drives the middle gear 3051 to rotate through teeth on an output shaft of the hydraulic cylinder, the middle gear 3051 rotates, the sliding rack 3053 meshed with the other side is driven to move upwards in the rotating process, after the sliding up process, the push rod 3054 contacts with the rotating shaft 301, is blocked by the rotating shaft 301, drives the push rod 3054 to rotate to give way, when the push rod 3054 moves to the upper side of the rotating shaft 301, the push rod 3055 is driven to reset to a horizontal state under the tensile force of the spring of the middle spring 3055, and when the output end of the hydraulic cylinder moves downwards to contact with the plane of the upper pressing die 303, the whole upper pressing die 303 and the rotating shaft 301 are synchronously driven to press in the die cavity of the die sleeve 202, and the pressing gear of powder is formed. And in the whole process of moving down the rotating shaft 301, the supporting frame 406 is driven to move down, and one side of the supporting frame 406 is meshed with the repeated gear 405, so that when the supporting frame 406 slides up and down, the repeated gear 405 is driven to rotate in a forward and reverse rotation mode, and then the connecting shaft 404 drives the downflowing metal powder in the material box 401 to stir, so that the metal powder entering the die sleeve 202 is more loose and uniform, and the discharging pressing rod 408 arranged on the other side of the supporting frame 406 enters the other die sleeve 202 when moving down, so that the formed gear is pushed out from the position of the discharging hole 212, and discharging is realized. When the hydraulic cylinder is reset to move upwards, at this time, the hydraulic cylinder moves upwards to drive the middle gear 3051 to turn over, and then drives the sliding rack 3053 to slide up and down on the fixing frame 3052, and when sliding downwards, the push rod 3054 will contact with the right-angle groove 3011 on the rotating shaft 301, and then continues to move downwards to drive the rotating shaft 301 to rotate, and at this time, the rotating shaft 301 also drives the limit slider 310 to move upwards through the pushing of the two reset springs 312, and will also drive the rotating shaft 301 to move upwards to reset. The push rod 3054 is blocked by the blocking piece 3056 above to limit the rotation of the push rod 3054, so that the rotary shaft 301 is pushed to turn over by 90 degrees, and when the rotary shaft 301 turns over, two cross frames are driven to rotate, so that different types of upper pressing dies 303 and cleaning discs 314 connected with the cross frames are driven to rotate, and because the plurality of die sleeves 202 are arranged, teeth and modules of each die sleeve 202 are different, the same upper pressing die 303 cannot be applied, the power of the hydraulic cylinder for upward movement is utilized to drive the switching of the die sleeves 202, and the switching of the upper pressing dies 303 is carried out, and the lower pressing processing is waited. When the die assembly 2 rotates, the fixed fluted disc 208 on the die sleeve 202 is driven to mesh with the residual fluted disc 211 to drive the die sleeve 202 to rotate by a small angle, and then when the die sleeve 202 rotates, after the fixed fluted disc 208 on the die sleeve 202 is separated from the residual fluted disc 211, the die sleeve 202 is pulled by the connecting spring 209, the die sleeve 202 is driven to turn over and reset, so that the die sleeve 202 is rotated left and right, the internal metal powder is uniformly shaken, the uniformity of the internal powder is controlled, the quality after lamination is ensured, the elastic sheet 206 is driven to perform interference extrusion when the die sleeve 202 rotates, the elastic sheet 206 is driven to deform when the die sleeve 202 rotates and drives the elastic sheet 206 to deform to the limit, the elastic sheet 206 is scratched on the surface of the die sleeve 202 at the moment, and the impact ball 207 is directly knocked on the die sleeve 202 of the next feeding by utilizing the self elastic force, so that the flatness and uniformity of the internal metal powder are improved. The power of the upward movement of the hydraulic cylinder is used integrally to drive the rotation replacement of the upper die 303 and the rotation replacement of the die sleeve 202, and the metal powder is directly pressed and molded during the pressing operation.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Claims

1. A metal powder metallurgy gear processing die is characterized in that:

a frame (1);

a mould assembly (2) for providing moulds of a plurality of types;

the circulation assembly (3) is used for controlling circulation switching processing of the die assembly (2);

the feeding and discharging assembly (4) is used for providing metal powder into the die assembly (2) and extruding the gear formed in the die assembly (2);

the pressing assembly (5) is used for providing pressure to press and mold the metal powder in the die assembly (2);

the die assembly (2) comprises an upper rotary table (201) and a lower rotary table (203), a plurality of die sleeves (202) are arranged between the upper rotary table (201) and the lower rotary table (203), and a fixed disc (204) is arranged at the bottom of the lower rotary table (203);

the circulating assembly (3) comprises a rotating shaft (301), a first cross (302) and a twenty-first cross (313) are arranged on the rotating shaft (301), a plurality of upper pressing dies (303) are arranged on the first cross (302), a swinging shaft (304) is connected to the rotating shaft (301), a positioning disc (306) is movably connected to the surface of the swinging shaft (304), a rotating shaft (307) is connected to the positioning disc (306) in a sliding manner through a key groove, the rotating shaft (307) is connected with the upper rotating disc (201) through a supporting rod (309), a compression spring (308) is arranged below the positioning disc (306), limit sliding blocks (310) are connected to two ends of the rotating shaft (301), a fixed sliding rod (311) is connected to the limit sliding blocks (310) in a sliding manner, and a reset spring (312) is sleeved on the surface of the fixed sliding rod (311) in the inside of the frame (1);

the feeding and discharging assembly (4) comprises a feed box (401), a discharging sleeve (402) is communicated with the bottom of the feed box (401), a connecting shaft (404) is connected to the discharging sleeve (402) in a rotating mode, a repeated gear (405) is connected to the other end of the connecting shaft (404), a supporting frame (406) is meshed on the repeated gear (405), the supporting frame (406) is connected to the rotating shaft (301), and a blade (403) is connected to one end of the connecting shaft (404).

2. The metal powder metallurgy gear working die according to claim 1, wherein: the fixed disk (204) is fixedly provided with a residual fluted disk (211), the die sleeve (202) is provided with a fixed fluted disk (208) meshed with the residual fluted disk (211), the lower turntable (203) is provided with a spring piece (210), the spring piece (210) is provided with a connecting spring (209), and one end of the connecting spring (209) is connected with the die sleeve (202).

3. The metal powder metallurgy gear working die according to claim 2, wherein: be provided with fixed cover (205) on incomplete fluted disc (211), be connected with two shell fragments (206) on fixed cover (205), the one end of shell fragment (206) is connected with and beats ball (207), beat ball (207) and die sleeve (202) surface contact, discharge gate (212) have been seted up to the bottom of fixed disc (204).

4. The metal powder metallurgy gear working die according to claim 1, wherein: a plurality of cleaning discs (314) are arranged on the twenty-first bracket (313), and the upper pressing die (303) and the cleaning discs (314) are arranged above the die sleeve (202).

5. The metal powder metallurgy gear working die according to claim 4, wherein: be provided with screens device on rotation axis (301), screens device is including connection piece (315), one side and spacing slider (310) of connection piece (315) are connected, sliding connection has plug axle (316) on connection piece (315), support spring (317) have been cup jointed on plug axle (316), the one end and the plug axle (316) of support spring (317) are connected, the other end and the connection piece (315) of support spring (317) are connected, be provided with a plurality of V type grooves (3012) with plug axle (316) complex on rotation axis (301).

6. The metal powder metallurgy gear working die according to claim 1, wherein: be provided with location rotary device (305) on rotation axis (301), location rotary device (305) are including mount (3052), be connected with intermediate gear (3051) on mount (3052), sliding connection has slip rack (3053) on mount (3052), slip rack (3053) and intermediate gear (3051) intermeshing, the bottom rotation of slip rack (3053) is connected with push rod (3054), push rod (3054) top is provided with separation blade (3056), separation blade (3056) are connected on slip rack (3053), be connected with intermediate spring (3055) on push rod (3054), the top and the slip rack (3053) of intermediate spring (3055) are connected, be provided with a plurality of right angle grooves (3011) on rotation axis (301).

7. The metal powder metallurgy gear working die according to claim 1, wherein: the pressing assembly (5) is a hydraulic cylinder, and a tooth is arranged on an output shaft of the hydraulic cylinder and is meshed with the intermediate gear (3051).

8. The metal powder metallurgy gear working die according to claim 1, wherein: the supporting frame (406) is connected with a limiting rod (407), and the limiting rod (407) is connected to the feed box (401) in a sliding mode.

9. The metal powder metallurgy gear working die according to claim 8, wherein: the bottom of support frame (406) is provided with ejection of compact depression bar (408), ejection of compact depression bar (408) are located the top of discharge gate (212).