A forming device and forming method for a compressor valve plate used in powder metallurgy

Abstract

The present invention relates to the technical field of powder metallurgy forming, and discloses a forming device and a forming method for a compressor valve plate used in powder metallurgy. The forming device includes a lower die body, a guiding bracket is fixed on the lower die body, an upper die body is slidably connected to the guiding bracket, a servo hydraulic cylinder is fixed on the top of the guiding bracket, a telescopic end of the servo hydraulic cylinder is fixedly connected to the upper die body, a forming groove is formed in the lower die body, a forming head is arranged on the upper die body, a feeding box is arranged on the lower die body, and a push rod assembly for adjusting the working position of the feeding box is fixed at one end of the lower die body; the metal powder can be evenly distributed in the forming groove, so that the thickness of the workpiece after forming is relatively uniform, and it is convenient to quantitatively spray lubricant into the metal powder, improve the fluidity of the metal powder, and improve the processing quality of the workpiece.

Description

Technical Field

[0001] The present invention relates to the technical field of powder metallurgy forming, and specifically relates to a forming device and a forming method for a compressor valve plate used in powder metallurgy. Background Art

[0002] Powder metallurgy forming is a process of pressing loose powders of metals, ceramics or other materials in a mold under pressure to form semi-finished products with predetermined geometric shapes, sizes, densities and strengths, and then obtaining semi-finished product blanks by demolding. This process is one of the basic processes in powder metallurgy production, and its purpose is not limited to making semi-finished products, but to finally obtain finished products. The semi-finished products after forming need to go through at least subsequent sintering processes to become finished products. Powder metallurgy forming technology uses a mixture of metal powders and compound powders as raw materials, and through forming and sintering operations, a processing method for producing metal materials and their composites is obtained. In a broad sense, the powder metallurgy products industry includes ironstone tools, cemented carbides, magnetic materials and powder metallurgy products.

[0003] Currently, during the forming process of the compressor valve plate, due to the large forming area of the compressor valve plate, when the formed powder fills the forming groove of the mold, uneven filling will occur due to the poor fluidity of the powder, resulting in uneven thickness after the compressor valve plate is formed, which will affect the pressing quality of the compressor valve plate. Summary of the Invention

[0004] The present invention provides a forming device and a forming method for a compressor valve plate used in powder metallurgy, which have the beneficial effect of being able to evenly distribute metal powder in the forming groove, making the thickness of the workpiece more uniform after forming, and improving the processing quality of the workpiece, and solving the problem mentioned in the above background art that when the formed powder fills the forming groove of the mold, uneven filling will occur due to the poor fluidity of the powder, resulting in uneven thickness after the compressor valve plate is formed, which will affect the pressing quality of the compressor valve plate.

[0005] The present invention provides the following technical solution: A forming device for a compressor valve plate used in powder metallurgy, including a lower die body, a guiding bracket is fixed on the lower die body, an upper die body is slidably connected to the guiding bracket, a servo hydraulic cylinder is fixed on the top of the guiding bracket, the telescopic end of the servo hydraulic cylinder is fixedly connected to the upper die body, a forming groove is opened on the lower die body, a forming head is arranged on the upper die body, a feeding box is arranged on the lower die body, and a push rod assembly for adjusting the working position of the feeding box is fixed at one end of the lower die body;

[0006] A conical material guide plate is fixed in the material loading box, and a plurality of equally spaced material guide slots are provided on the conical material guide plate. A cylinder is provided below the conical material guide plate, and a plurality of circumferentially equally spaced material distribution seats are fixed on the cylinder, and a plurality of equally spaced material discharge holes are provided on the material distribution seat. A sleeve is rotatably connected to the conical material guide plate below, and a plurality of scrapers are fixed on the sleeve. A servo motor is provided in the cylinder, and a motor shaft of the servo motor is fixed in the sleeve.

[0007] As an optional scheme of the compressor valve plate forming device for powder metallurgy described in the present invention, wherein: the push rod assembly includes a mounting bracket, the mounting bracket is fixed on the lower mold body, an electric push rod is fixed on the mounting bracket, the telescopic end of the electric push rod is fixedly connected to the loading box, guide ear blocks are provided on both sides of the mounting bracket, a guide rod is slidably connected to the guide ear block, and one end of the guide rod is fixed to the loading box.

[0008] As an optional solution of the compressor valve plate forming device for powder metallurgy described in the present invention, a cover plate is fixed on the top of the feeding box, a powder conveying pipe is fixed on the cover plate, an annular block is fixed in the cylinder, and the annular block is elastically connected to the servo motor through a torsion spring.

[0009] As an optional solution of the compressor valve plate forming device for powder metallurgy of the present invention, a sealing plate is arranged in the material distribution seat, one end of the sealing plate is slidably connected to the cylinder, and a plurality of first through holes distributed equally are opened on the sealing plate.

[0010] As an optional solution of the valve plate forming device for a compressor for powder metallurgy according to the present invention, a first resistance rod is fixed at one end of the sealing plate, the first resistance rod is elastically connected to the cylinder through a first spring, and a plurality of first resistance blocks are fixed on the circumferential surface of the servo motor.

[0011] As an optional solution of the compressor valve plate forming device for powder metallurgy described in the present invention, wherein: a second resistance rod is slidably connected to the loading box, a second resistance block is fixed to one end of the second resistance rod, the second resistance block is elastically connected to the loading box through a second spring, the second spring is sleeved on the second resistance rod, and a limiting block is fixed on one side of the lower mold.

[0012] As an alternative solution of the compressor valve plate forming device for powder metallurgy according to the present invention, wherein: a cavity is provided inside the scraper, lubricating oil flow channels are provided on both the conical material guiding disc and the cylinder, one end of the cavity is communicated with the lubricating oil flow channel, a lubricating oil pipe is fixed on the conical material guiding disc, the other end of the lubricating oil pipe is communicated with the lubricating oil flow channel, and a plurality of equally spaced oil spraying holes are provided on the scraper.

[0013] As an alternative solution of the compressor valve plate forming device for powder metallurgy according to the present invention, wherein: a sealing strip is provided inside the cavity, a plurality of second through holes are provided on the sealing strip, one end of the sealing strip is fixed with a third abutting rod, the third abutting rod is elastically connected with the scraper through a third spring, and a third abutting block is fixed on the material distributing seat.

[0014] As an alternative solution of the compressor valve plate forming device for powder metallurgy according to the present invention, wherein: a rotating shaft is rotatably connected to the material distributing seat, a plurality of stirring blades are fixed on the rotating shaft, and a gear is fixed at one end of the rotating shaft, and an annular gear is fixed on the feeding box, and the gear meshes with the annular gear.

[0015] A forming method for a compressor valve plate for powder metallurgy includes the following specific steps:

[0016] Mixing: According to the requirements of the product, different proportions of metal powders are mixed evenly by wet or dry methods to make blank powders.

[0017] Feeding: The feeding box is pushed horizontally by a push rod assembly to gradually approach the forming groove of the lower die body. At the same time, the mixed metal powders flow into the feeding box through the powder conveying pipe in the forming device and are distributed by a plurality of material distributing seats.

[0018] Leveling: The servo motor in the forming device drives a plurality of scrapers to rotate, and the metal powders in the material distributing seats can be scraped evenly.

[0019] Adding lubricant: The lubricant is injected into the cavity inside the scraper from the lubricating oil flow channel through the lubricating oil pipe connected by an oil supply device, and the lubricant is quantitatively sprayed into the metal powders when the scraper rotates.

[0020] Stirring and discharging: The feeding box moves to directly above the forming groove, the rotation of the scraper is restricted, the servo motor rotates itself, which can drive the material distributing seat to rotate. When the material distributing seat rotates, it drives the stirring blades to rotate, and the metal powders and the lubricant are stirred evenly. At the same time, during the rotation of the material distributing seat, the first abutting block is prompted to open the hole sealing plate for discharging. The servo motor rotating itself drives the material distributing seat to rotate synchronously, and the metal powders are evenly distributed in the forming groove.

[0021] Molding: The L push rod assembly drives the loading box away from the molding groove, and the servo hydraulic cylinder drives the specific molding head of the upper mold to move, pressurizing the evenly distributed metal powder in the molding groove to form the required shape;

[0022] Sintering: The pressed workpiece is taken out and placed in a heating device for sintering to form grain boundary bonding between metal powders, thereby obtaining the required physical and mechanical properties.

[0023] The present invention has the following beneficial effects:

[0024] 1. In the compressor valve plate forming device for powder metallurgy, the feed box is pushed to move horizontally by the push rod assembly and gradually approaches the specific forming groove of the lower die. The metal powder can be transported to the feed box through the powder conveying pipe arranged on the cover plate. The conical guide plate fixed in the feed box and the several guide slots opened on the conical guide plate can conveniently distribute the metal powder to several material distribution seats. The servo motor arranged in the cylinder can drive the sleeve and the several scrapers fixed on the sleeve to rotate, so that the scrapers can evenly scrape the metal powder in the material distribution seat, so as to achieve the purpose of evenly distributing the metal powder in the material distribution seat and avoid the phenomenon of less or more metal powder in several material distribution seats. The sealing plate arranged in the material distribution seat can be used in the process of material distribution. The purpose of sealing the feeding hole is achieved in the process to prevent metal powder from falling into the forming groove during the material distribution process and affecting the forming quality of the workpiece. When the loading box is located directly above the forming groove, the limiting structure composed of the second resistance rod, the second resistance block and the limit block can limit the scraper after the scraper is scraped flat. The servo motor first rotates relative to the feeding seat, so that the first resistance block fixed on the servo motor body can be deflected slightly and then resist the first resistance rod fixed on the sealing plate, which can prompt the sealing plate to move, so that the misaligned first through hole and the feeding hole overlap, and then the servo motor body rotates synchronously with the feeding seat, which can evenly distribute the metal powder in the forming groove, so that the thickness of the workpiece after forming is more uniform, thereby improving the processing quality of the workpiece.

[0025] 2. In the compressor valve plate forming device for powder metallurgy, the lubricant used to improve the flowability of metal powder can flow into the cavity in the scraper through the cooperation of the lubricating oil pipe, the lubricating oil flow channel and the cavity in the scraper. The sealing strip arranged in the cavity can achieve the purpose of sealing a plurality of equidistantly distributed oil injection holes opened at the bottom of the scraper, thereby avoiding direct flow into the distributor seat and contact with the metal powder. When the scraper is driven to rotate by the motor shaft of the servo motor, the third resistance rod fixed at one end of the sealing strip can be brought into contact with the third resistance block fixed on the distributor seat, thereby causing the sealing strip to move horizontally on the scraper, so that the dislocated oil injection holes can communicate with the second through hole, thereby facilitating the quantitative spraying of lubricant into the metal powder, thereby avoiding the problem of excessive spraying of lubricant affecting the forming quality of the workpiece.

[0026] 3. In the forming device for the compressor valve plate used in powder metallurgy, the rotating shaft rotatably connected to the material distributing seat can be connected to a plurality of stirring blades, which is convenient for uniformly stirring the metal powder and lubricant in the material distributing seat, promoting the full contact between the metal powder and the lubricant. When the gear fixed on the rotating shaft meshes with the annular gear ring fixed on the feeding box, when the servo motor drives the material distributing seat to rotate for material distribution, the gear can automatically drive the rotating shaft to rotate to stir the metal powder and lubricant, greatly improving the effect that the metal powder can be fully contacted with the lubricant during the material distribution process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0028] Figure 2 It is a structural sectional view of the present invention.

[0029] Figure 3 It is one of the three-dimensional structural schematic diagrams of the feeding box of the present invention.

[0030] Figure 4 It is the second three-dimensional structural schematic diagram of the feeding box of the present invention.

[0031] Figure 5 It is a sectional view of the feeding structure of the present invention.

[0032] Figure 6 It is Figure 3 The partial enlarged view at A in

[0033] Figure 7 It is Figure 5 The partial enlarged view at B in

[0034] Figure 8 It is Figure 5 The partial enlarged view at C in

[0035] Figure 9 It is a flow chart of the forming method of the compressor valve plate of the present invention.

[0036] In the figure: 1, lower die body; 2, guiding bracket; 3, upper die body; 4, servo hydraulic cylinder; 5, forming groove; 6, forming head; 7, feeding box; 71, mounting bracket; 72, electric push rod; 73, guiding ear block; 74, guiding rod; 8, conical material guiding plate; 9, material guiding slot opening; 10, material distributing seat; 11, cylinder; 12, blanking hole; 13, cover plate; 14, powder conveying pipe; 15, sleeve; 16, servo motor; 17, scraper; 18, annular block; 19, torsion spring; 20, hole sealing plate; 21, first through hole; 22, first resisting rod; 23, first spring; 24, first resisting block; 25, second resisting rod; 26, second resisting block; 27, second spring; 28, limiting block; 29, cavity; 30, lubricating oil flow channel; 31, lubricating oil pipe; 32, oil spraying hole; 33, sealing strip; 34, second through hole; 35, third resisting rod; 36, third spring; 37, third resisting block; 38, rotating shaft; 39, stirring blade; 40, gear; 41, annular gear ring. Detailed implementation manner

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] Example 1, please refer to Figures 1-9 , a compressor valve plate forming device for powder metallurgy, including a lower die body 1, a guiding bracket 2 is fixed on the lower die body 1, an upper die body 3 is slidably connected to the guiding bracket 2, a servo hydraulic cylinder 4 is fixed on the top of the guiding bracket 2, the telescopic end of the servo hydraulic cylinder 4 is fixedly connected to the upper die body 3, a forming groove 5 is opened on the lower die body 1, a forming head 6 is arranged on the upper die body 3, a feeding box 7 is arranged on the lower die body 1, and a push rod assembly for adjusting the working position of the feeding box 7 is fixed at one end of the lower die body 1;

[0039] A conical material guiding plate 8 is fixed in the feeding box 7, a plurality of equidistantly distributed material guiding slot openings 9 are opened on the conical material guiding plate 8, a cylinder 11 is arranged below the conical material guiding plate 8, a plurality of material distributing seats 10 are fixedly arranged on the cylinder 11 at circumferential equal distances, a plurality of equidistantly distributed blanking holes 12 are opened on the material distributing seats 10, a sleeve 15 is rotatably connected below the conical material guiding plate 8, a plurality of scrapers 17 are fixed on the sleeve 15, and a servo motor 16 is arranged in the cylinder 11, and the motor shaft of the servo motor 16 is fixed in the sleeve 15.

[0040] The push rod assembly includes a mounting bracket 71, which is fixed on the lower mold body 1. An electric push rod 72 is fixed on the mounting bracket 71. The telescopic end of the electric push rod 72 is fixedly connected to the loading box 7. Guide ear blocks 73 are provided on both sides of the mounting bracket 71. A guide rod 74 is slidably connected to the guide ear block 73, and one end of the guide rod 74 is fixed on the loading box 7.

[0041] A cover plate 13 is fixed on the top of the loading box 7 , a powder conveying pipe 14 is fixed on the cover plate 13 , an annular block 18 is fixed in the cylinder 11 , and the annular block 18 is elastically connected to the servo motor 16 via a torsion spring 19 .

[0042] A sealing plate 20 is disposed in the material distributing seat 10 , one end of the sealing plate 20 is slidably connected to the cylinder 11 , and a plurality of first through holes 21 equidistantly distributed are formed on the sealing plate 20 .

[0043] A first abutment rod 22 is fixed to one end of the sealing plate 20 . The first abutment rod 22 is elastically connected to the cylinder 11 via a first spring 23 . A plurality of first abutment blocks 24 are fixed to the circumferential surface of the servo motor 16 .

[0044] A second resistance rod 25 is slidably connected to the loading box 7, a second resistance block 26 is fixed to one end of the second resistance rod 25, the second resistance block 26 is elastically connected to the loading box 7 via a second spring 27, the second spring 27 is sleeved on the second resistance rod 25, and a limiting block 28 is fixed to one side of the lower mold body 1.

[0045] When loading, refer to Figures 1-7The electric push rod 72 fixed on the mounting bracket 71 of the push rod assembly pushes the loading box 7 to move horizontally, gradually approaching the molding groove 5 provided on the lower mold body 1, and the cooperation of the guide ear block 73 and the guide rod 74 can improve the stability of the horizontal movement of the loading box 7. At the same time, the powder conveying pipe 14 provided on the cover plate 13 can transport the metal powder into the loading box 7, and the conical guide plate 8 fixed in the loading box 7 and the several guide slots 9 provided on the conical guide plate 8 can conveniently distribute the metal powder into several material distribution seats 10, and pass through the cylinder 1 The servo motor 16 arranged in the sleeve 1 can drive the sleeve 15 and the plurality of scrapers 17 fixed on the sleeve 15 to rotate, and the metal powder distributed in the material distribution seat 10 can be scraped flat, so as to achieve the purpose of evenly distributing the metal powder inside the material distribution seat 10, and avoid the phenomenon that the amount of metal powder in the plurality of material distribution seats 10 is less or more. When the feeding box 7 is in the process of horizontal movement, the second contact rod 25 and the second contact block 26 can be driven to move horizontally synchronously, so that the second contact block 26 and the limit block 28 are in contact. At this time, the feeding box 7 The second spring 27 is located directly above the forming groove 5, so that the second resistance rod 25 moves horizontally in the feeding box 7, and the second spring 27 accumulates force to achieve the purpose of limiting the scraper 17. The servo motor 16 drives the scraper 17 to move. When the scraper 17 cannot rotate, the servo motor 16 rotates by itself, so that the body of the servo motor 16 rotates relatively within a certain angle range on the annular block 18 of the cylinder 11. The torsion spring 19 accumulates force, and the first resistance block 24 fixed on the body of the servo motor 16 can resist the first resistance rod 22 fixed on the sealing plate 20. The first spring 23 accumulates force, prompting the sealing plate 20 to move horizontally in the material distribution seat 10 so that the misaligned first through hole 21 and the discharge hole 12 overlap, and then the servo motor 16 body drives the material distribution seat 10 to rotate synchronously, which can evenly distribute the metal powder in the forming groove 5, so that the thickness of the workpiece after forming is more uniform, and the push rod assembly drives the loading box 7 to reset, and drives the upper mold body 3 to move vertically on the guide bracket 2 through the servo hydraulic cylinder 4, prompting the forming head 6 to pressurize the evenly distributed metal powder in the forming groove 5 to form the desired shape.

[0046] Embodiment 2: This embodiment is an improvement made on the basis of Embodiment 1. For details, please refer to Figures 1-9 A cavity 29 is provided in the scraper 17, and lubricating oil flow channels 30 are provided on the conical guide plate 8 and the cylinder 11. The cavity 29 is connected to one end of the lubricating oil flow channel 30. A lubricating oil pipe 31 is fixed on the conical guide plate 8, and the lubricating oil pipe 31 is connected to the other end of the lubricating oil flow channel 30. The scraper 17 is provided with a plurality of equidistantly distributed oil injection holes 32.

[0047] A sealing strip 33 is provided in the cavity 29 , and a plurality of second through holes 34 are formed on the sealing strip 33 . A third resistance rod 35 is fixed to one end of the sealing strip 33 , and the third resistance rod 35 is elastically connected to the scraper 17 via a third spring 36 . A third resistance block 37 is fixed to the material distribution seat 10 .

[0048] A rotating shaft 38 is rotatably connected to the material distributing seat 10 , and a plurality of stirring blades 39 are fixed to the rotating shaft 38 . A gear 40 is fixed to one end of the rotating shaft 38 , and an annular gear ring 41 is fixed to the material loading box 7 , and the gear 40 and the annular gear ring 41 are meshed with each other.

[0049] Due to the poor fluidity of the powder, it will lead to uneven filling and affect the pressing quality. The fluidity of the powder can be improved by improving the particle size distribution and morphology of the powder and adding an appropriate amount of lubricant. Figures 5-8 , through the cooperation of the lubricating oil pipe 31, the lubricating oil flow channel 30 and the cavity 29 in the scraper 17, the lubricant used to improve the flowability of the metal powder can flow into the cavity 29 in the scraper 17. When the scraper 17 rotates, the third contact rod 35 fixed at one end of the blocking strip 33 can be in contact with the third contact block 37 fixed on the material distribution seat 10, so that the blocking strip 33 moves horizontally on the scraper 17, and the third spring 36 accumulates force, so that the dislocated oil injection hole 32 and the second through hole 34 can be communicated, so that the lubricant can be quantitatively sprayed into the metal powder;

[0050] In actual production, if the lubricant is mixed evenly with the metal powder in advance, adhesion may occur, which makes it easy to block the metal powder when feeding, affecting the feeding speed. The lubricant may also volatilize in contact with the air, thus affecting the lubrication effect. It is necessary to stir the metal powder evenly when feeding it. Figures 3-5 When the material distribution seat 10 rotates, it can drive the gear 40 fixed on the rotating shaft 38 to move. Through the cooperation of the annular gear ring 41 fixed on the feeding box 7, the rotating shaft 38 drives a plurality of stirring blades 39 to evenly stir the metal powder and lubricant in the material distribution seat 10, which greatly improves the effect of the metal powder being able to fully contact with the lubricant during the feeding process.

[0051] Embodiment 3: This embodiment is an improvement made on the basis of Embodiment 1. For details, please refer to Figures 1-9 The method for forming a compressor valve plate for powder metallurgy comprises the following specific steps:

[0052] Mixing: According to the requirements of the product, metal powders of different proportions are mixed evenly by wet or dry methods to make blank powder;

[0053] Feeding: The feeding box 7 is pushed horizontally by the push rod assembly to gradually approach the forming groove 5 of the lower die body 1. Meanwhile, the mixed metal powder flows into the feeding box 7 through the powder conveying pipe 14 in the forming device and is distributed by several material distributing seats 10.

[0054] Leveling: The servo motor 16 in the forming device drives several scraping plates 17 to rotate, and the metal powder in the material distributing seats 10 can be scraped evenly.

[0055] Adding lubricant: The lubricant is injected into the cavity 29 in the scraping plate 17 from the lubricant flow channel 30 through the lubricating oil pipe 31 connected to the oil supply device. When the scraping plate 17 rotates, the lubricant is quantitatively sprayed into the metal powder.

[0056] Stirring and discharging: The feeding box 7 moves to directly above the forming groove 5, the rotation of the scraping plate 17 is restricted, the servo motor 16 rotates self - sufficiently, which can drive the material distributing seats 10 to rotate. When the material distributing seats 10 rotate, the stirring blades 39 are driven to rotate, and the metal powder and the lubricant are stirred evenly. At the same time, during the rotation of the material distributing seats 10, the first abutting block 24 prompts the sealing plate 20 to open for discharging. The self - rotating servo motor 16 drives the material distributing seats 10 to rotate synchronously, and the metal powder is evenly distributed in the forming groove 5.

[0057] Forming: The L - shaped push rod assembly drives the feeding box 7 away from the forming groove 5, and the servo hydraulic cylinder 4 drives the forming head 6 of the upper die body 3 to move, and the uniformly distributed metal powder in the forming groove 5 is pressurized to form the required shape.

[0058] Sintering: The pressed workpiece is taken out and placed in the heating equipment. Through sintering, grain boundary bonding is formed between the metal powders, so as to obtain the required physical and mechanical properties.

[0059] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or sequence between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non - exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0060] The above - mentioned are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A compressor valve plate forming device for powder metallurgy, comprising a lower die body, characterized in that: A guide bracket is fixed on the lower mold body, an upper mold body is slidably connected to the guide bracket, a servo hydraulic cylinder is fixed on the top of the guide bracket, a telescopic end of the servo hydraulic cylinder is fixedly connected to the upper mold body, a molding groove is provided on the lower mold body, a molding head is provided on the upper mold body, a loading box is provided on the lower mold body, and a push rod assembly for adjusting the working position of the loading box is fixed to one end of the lower mold body; A conical material guide plate is fixed in the material loading box, and a plurality of material guide slots equidistantly distributed are provided on the conical material guide plate. A cylinder is provided below the conical material guide plate, and a plurality of material distribution seats equidistantly distributed around the circumference are fixed on the cylinder. A plurality of material discharge holes equidistantly distributed are provided on the material distribution seat. A sleeve is rotatably connected below the conical material guide plate, and a plurality of scrapers are fixed on the sleeve. A servo motor is provided in the cylinder, and a motor shaft of the servo motor is fixed in the sleeve. A sealing plate is arranged in the material distributing seat, one end of the sealing plate is slidably connected to the cylinder, and a plurality of first through holes distributed at equal intervals are opened on the sealing plate; A cavity is provided in the scraper, and lubricating oil flow channels are provided on the conical material guide plate and the cylinder. The cavity is connected with one end of the lubricating oil flow channel, and a lubricating oil pipe is fixed on the conical material guide plate, and the lubricating oil pipe is connected with the other end of the lubricating oil flow channel. A plurality of equidistantly distributed oil injection holes are provided on the scraper.

2. The powder metallurgy compressor valve plate forming device according to claim 1, characterized in that: The push rod assembly includes a mounting bracket, which is fixed on the lower mold body, an electric push rod is fixed on the mounting bracket, the telescopic end of the electric push rod is fixedly connected to the loading box, guide ear blocks are provided on both sides of the mounting bracket, a guide rod is slidably connected to the guide ear block, and one end of the guide rod is fixed to the loading box.

3. The powder metallurgy compressor valve plate forming device according to claim 2, characterized in that: A cover plate is fixed on the top of the feeding box, a powder conveying pipe is fixed on the cover plate, an annular block is fixed in the cylinder, and the annular block is elastically connected to the servo motor through a torsion spring.

4. The compressor valve plate forming device for powder metallurgy according to claim 3, characterized in that: A first abutment rod is fixed at one end of the sealing plate, the first abutment rod is elastically connected to the cylinder via a first spring, and a plurality of first abutment blocks are fixed on the circumferential surface of the servo motor.

5. The compressor valve plate forming device for powder metallurgy according to claim 4, characterized in that: A second resistance rod is slidably connected to the feeding box, a second resistance block is fixed to one end of the second resistance rod, the second resistance block is elastically connected to the feeding box through a second spring, the second spring is sleeved on the second resistance rod, and a limiting block is fixed to one side of the lower mold.

6. The compressor valve plate forming device for powder metallurgy according to claim 5, characterized in that: A blocking strip is arranged in the cavity, a plurality of second through holes are opened on the blocking strip, a third resistance rod is fixed to one end of the blocking strip, the third resistance rod is elastically connected to the scraper through a third spring, and a third resistance block is fixed to the material distribution seat.

7. The powder metallurgy compressor valve plate forming device according to claim 6, characterized in that: The material distributing seat is rotatably connected with a rotating shaft, a plurality of stirring blades are fixed on the rotating shaft, a gear is fixed on one end of the rotating shaft, an annular gear ring is fixed on the material feeding box, and the gear and the annular gear ring are meshed with each other.

8. The method for forming a valve plate for a compressor for powder metallurgy according to claim 7, characterized in that: The specific steps include: Mixing: According to the requirements of the product, metal powders of different proportions are mixed evenly by wet or dry methods to make blank powder; Loading: The feeding box is pushed horizontally by the push rod assembly, gradually approaching the specific forming groove of the lower die. At the same time, the mixed metal powder flows to the feeding box through the powder conveying pipe in the forming device, and is distributed through several distribution seats; Scraping: The servo motor in the forming device drives several scrapers to rotate, which can scrape the metal powder in the material distribution seat evenly; Add lubricant: connect the lubricating oil pipe through the oil supply device to inject the lubricant from the lubricating oil flow channel into the cavity inside the scraper, and spray the lubricant into the metal powder in a quantitative manner when the scraper rotates; Mixing and unloading: The loading box moves to the top of the forming tank, restricts the rotation of the scraper, and the servo motor rotates, which can drive the distribution seat to rotate. The distribution seat drives the mixing blades to rotate during the rotation, and the metal powder and lubricant are evenly mixed. At the same time, during the rotation of the distribution seat, the first resistance block opens the sealing plate to unload the material. The rotating servo motor drives the distribution seat to rotate synchronously, and the metal powder is evenly distributed in the forming tank; Molding: The L push rod assembly drives the loading box away from the molding groove, and the servo hydraulic cylinder drives the specific molding head of the upper mold to move, pressurizing the evenly distributed metal powder in the molding groove to form the required shape; Sintering: The pressed workpiece is taken out and placed in a heating device for sintering to form grain boundary bonding between metal powders, thereby obtaining the required physical and mechanical properties.

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