Forming die for powder metallurgy rotor and rotor thereof

Abstract

The invention relates to the technical field of powder metallurgy, in particular to a forming die for a powder metallurgy rotor and the rotor thereof.The forming die comprises a workbench, a lower die is fixedly installed at the upper end of the workbench, a middle column is rotatably installed in the middle of the lower die, and an upper die is arranged on the upper side of the lower die; a forming mechanism used for pressing and forming a rotor is further arranged, a first hydraulic cylinder is rotationally installed in the middle of the upper end of the upper die, and a support is fixedly installed in the middle of the first hydraulic cylinder. The bevel guide plate moves to the lower sides of two nozzles, located on the upper portions of the left side and the right side of the middle column, of the nozzle frame, then the direction of a release agent sprayed by the two nozzles of the nozzle frame can be changed by the bevel guide plate, the release agent is sprayed to the upper side of the outer surface of the middle column, and the release agent can be evenly sprayed to the outer surface of the middle column along with rotation of the middle column; and rapid demolding after subsequent rotor forming is facilitated, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of powder metallurgy, in particular to a forming die for powder metallurgy rotor and the rotor thereof. BACKGROUND

[0002] Powder metallurgy is an industrial technology that produces metal powder or uses metal powder (or a mixture of metal powder and non-metal powder) as raw material, through forming and sintering, to produce metal materials, composite materials and various types of products. Powder metallurgy technology has been widely used in transportation, machinery, electronics, aerospace, weapons, biology, new energy, information and nuclear industries, etc. It has become one of the most dynamic branches in the field of new material science. Powder metallurgy technology has a series of advantages such as significant energy saving, material saving, excellent performance, high product precision and good stability, and is very suitable for mass production.

[0003] For example, the patent with application number CN202122527575.7 discloses a "forming die for powder metallurgy rotor", which includes a bottom plate, the bottom plate is symmetrically fixedly connected with a support plate at the bottom, and a motor is fixedly connected to the bottom of the bottom plate. The output shaft end of the motor penetrates through the bottom plate and is fixedly connected with a turntable.

[0004] However, in the above-mentioned die, after the rotor is cooled and formed in the die, the rotor is easily tightly adhered to the inner wall of the die, which makes it difficult to demold, time-consuming and laborious, and affects the production efficiency. SUMMARY

[0005] The present application aims to solve the problem that in the prior art, after the rotor is cooled and formed in the die, the rotor is easily tightly adhered to the inner wall of the die, which makes it difficult to demold, time-consuming and laborious, and affects the production efficiency. A forming die for powder metallurgy rotor and the rotor thereof are provided.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0007] A forming die for powder metallurgy rotor, comprising a workbench, a lower die is fixedly installed on the upper end of the workbench, a middle column is rotatably installed in the middle of the lower die, and an upper die is arranged on the upper side of the lower die;

[0008] A forming mechanism for pressing and forming the rotor is also provided, a hydraulic cylinder one is rotatably installed on the middle upper end of the upper die, a bracket is fixedly installed on the middle of the hydraulic cylinder one, the bracket is fixedly installed on the workbench at the lower end, a positioning rod is slidably installed through the bracket, the lower end of the positioning rod is inserted into the upper die, a spring one is sleeved on the outer side of the positioning rod, and the upper and lower ends of the spring one are fixedly connected with the positioning rod and the bracket respectively. A nozzle holder is arranged between the upper die and the lower die, a hydraulic cylinder two is fixedly installed on the front end of the nozzle holder, and the lower end of the hydraulic cylinder two is fixedly installed on the workbench;

[0009] The injection mechanism for injecting the molten liquid metal raw material into the lower mold comprises a melting box slidably mounted on the upper end of the workbench, the melting box is located at the left side of the lower mold, a hydraulic cylinder six is fixedly installed on the left end of the melting box, and the lower end of the hydraulic cylinder six is fixedly installed on the workbench.

[0010] Preferably, a connecting pipe is fixedly and communicatively arranged in the middle of the right end of the nozzle frame, another end of the connecting pipe is fixedly and communicatively arranged with a releasing agent main pipe, a liquid pumping pump is arranged on the releasing agent main pipe, and the lower end of the releasing agent main pipe is connected with an external releasing agent storage tank.

[0011] Preferably, a hollow rod is rotatably penetrated and arranged on the upper end of the releasing agent main pipe, the upper end of the hollow rod is rotatably penetrated and arranged on the workbench, the upper end of the hollow rod is fixedly connected with the middle column, a nozzle strip is fixedly installed on one side of the middle column, and a channel is arranged in the middle column corresponding to the nozzle strip, and the channel is in communication with the hollow rod and the releasing agent main pipe.

[0012] Preferably, an arc-shaped baffle is slidably arranged on one side of the middle column corresponding to the nozzle strip, a motor is fixedly installed on the lower end of the workbench, and a gear set is fixedly installed on the output shaft of the motor and the outer side of the hollow rod, and the gear set is in meshing engagement.

[0013] Preferably, two top strips are slidably penetrated and arranged on the lower end of the lower mold and the upper end of the workbench, the upper end of the top strip is horizontally arranged with the bottom end of the lower mold, a connecting frame is fixedly installed on the lower end of the top strip, a hydraulic cylinder four is fixedly installed on the middle of the upper end of the connecting frame, and the upper end of the hydraulic cylinder four is fixedly installed on the workbench.

[0014] Preferably, two inclined guide plates are symmetrically arranged on the lower front side of the nozzle frame, the inclined guide plates are fixedly connected through a horizontal strip, a hydraulic cylinder five is fixedly installed on the front end of the horizontal strip, and the middle of the hydraulic cylinder five is fixedly connected with the nozzle frame.

[0015] Preferably, a discharge port is arranged on the lower side of the right end of the melting box, a sealing plate is abuttingly arranged at the outlet of the right end of the discharge port, a hydraulic cylinder seven is fixedly installed on the upper end of the sealing plate, and the upper end of the hydraulic cylinder seven is fixedly connected with the melting box.

[0016] Preferably, a recovery box is arranged on the lower front side of the discharge port, a rotating shaft is fixedly installed on the front end of the recovery box, a sliding block one is rotatably installed on the front end of the rotating shaft, a convex block is fixedly installed on the upper end of the rotating shaft, a clamping plate is clamped on the upper end of the convex block, a guide rod is fixedly installed on the upper end of the clamping plate, the guide rod is slidably penetrated and arranged on the sliding block one, and a spring two is sleeved on the outer side of the guide rod.

[0017] Preferably, a sliding block two is slidably arranged on the front end of the sliding block one, a screw one is threadedly installed on the middle of the sliding block one, and the screw one is rotatably installed on the sliding block two.

[0018] Preferably, the sliding block two front end is provided with a connecting plate, the sliding block two is provided with a screw rod two, the screw rod two is rotatably installed on the connecting plate, the connecting plate front end middle part is fixedly provided with a hydraulic cylinder eight, and the hydraulic cylinder eight is fixedly connected with the melting tank front end.

[0019] Compared with the prior art, the application has the beneficial effects that:

[0020] 1、In the application, the arc baffle is pushed upward to open the nozzle strip, the electromagnetic valve on the release agent main pipe is opened, the electromagnetic valve on the connecting pipe is closed, the liquid pump is started to draw the release agent in the external release agent storage tank through the release agent main pipe, the release agent is sprayed out from the nozzle strip through the inside of the hollow rod and the inside of the middle column, and the motor is started to drive the hollow rod and the middle column to rotate through the gear set, the middle column drives the nozzle strip to rotate, and the release agent is evenly sprayed on the inner wall of the lower mold in sequence.

[0021] 2、In the application, after the spraying is completed, the arc baffle is pushed downward to reset and be fixed on the middle column (a common clamping rod and clamping groove structure can be used, or an embedded electric push rod drive can be used, both of which are prior art and will not be repeated), the electromagnetic valve on the release agent main pipe is closed, the electromagnetic valve on the connecting pipe is opened, the release agent is sprayed out through the connecting pipe and the nozzle frame, and the hydraulic cylinder two is started to drive the nozzle frame to reciprocate forward and backward, so that the release agent is evenly sprayed on the lower end of the upper mold and the inner bottom of the lower mold.

[0022] 3、In the application, when the nozzle frame moves to the middle part of the lower mold, the hydraulic cylinder five is started to drive the horizontal strip and the inclined guide plate to move backward, so that the inclined guide plate moves to the lower side of the two nozzles on the upper part of the middle column on the left and right sides of the middle column, and then the release agent sprayed by the two nozzles of the nozzle frame is changed in direction by the inclined guide plate and sprayed on the upper side of the outer surface of the middle column, so that the release agent can be evenly sprayed on the outer surface of the middle column with the rotation of the middle column, which is beneficial to the rapid release of the rotor after molding and improves the work efficiency.

[0023] 4. In this invention, after spraying is completed, hydraulic cylinder two drives the nozzle frame to move to the rear side, without affecting the descent of the upper mold to press and form the rotor. Hydraulic cylinder six is ​​activated to drive the melting tank to the right, so that the discharge port is located on the upper side of the lower mold cavity. Hydraulic cylinder seven is activated to drive the sealing plate to rise, opening the discharge port. The molten metal in the melting tank is poured into the lower mold cavity. After injection, hydraulic cylinder seven drives the sealing plate to descend, closing the discharge port. Hydraulic cylinder six drives the melting tank to reset. Hydraulic cylinder one is activated to drive the upper mold to descend, pressing and forming the molten metal in the lower mold. After cooling, hydraulic cylinder one drives the upper mold to rise, and hydraulic cylinder four drives the connecting frame and top bar to rise, ejecting the cooled and formed rotor from the lower mold to complete demolding. This is convenient, quick, and efficient. Furthermore, by setting the melting tank displacement to reduce the setting of the injection pipe, it can effectively avoid the problem of excessively long injection pipes, which may cause heat loss and excessively rapid cooling during the flow of molten metal, affecting the subsequent pressing and forming quality. This improves the quality of rotor pressing and forming.

[0024] 5. In this invention, when the sealing plate closes the discharge port, the hydraulic cylinder eight is activated to drive the connecting plate, slider two, slider one, rotating shaft and recycling box to move towards the lower side of the discharge port, so that the recycling box is located at the lower side of the discharge port. The recycling box is set to facilitate the collection and recycling of excess molten metal at the connection between the discharge port and the sealing plate, and to prevent excess molten metal from dripping on the edge of the lower mold cavity, which would affect the normal pressing and forming of the rotor.

[0025] 6. In this invention, the recycling box has a built-in heating device that keeps the molten metal in a molten state. Rotating screw two drives slider two, slider one, the rotating shaft, and the recycling box to slide up on the connecting plate to the upper side of the melting box. Then, rotating screw one drives slider one, the rotating shaft, and the recycling box to move above the opening of the melting box. Pulling the guide rod upward drives the clamping plate to rise, compressing spring two, and causing the clamping plate to separate from the protrusion. Finally, pushing the recycling box and the rotating shaft to rotate on slider one pours the molten metal in the recycling box into the melting box, which facilitates the recycling of excess molten metal, saves costs, and is simple to operate.

[0026] 7. In this invention, after the rotor is formed, a certain amount of release agent will drip down under gravity after the upper mold is sprayed with release agent, which may affect the subsequent normal demolding. The rotor can be pushed up from the lower mold by the top bar, and before it is completely demolded from the lower mold, the positioning rod can be pulled up to stretch the spring one, so that the lower end of the positioning rod moves out of the upper mold. The upper mold can be rotated to make it rotate on the hydraulic cylinder one, so that the lower end of the upper mold and the side of the rotor connection can be easily separated, which is beneficial to improving the demolding efficiency of the rotor. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0028] Figure 2 isometric view of the bottom side of the application Figure 1

[0029] Figure 3 isometric view of the back side of the application Figure 1

[0030] Figure 4 isometric view of the cross-sectional view of the application Figure 1

[0031] Figure 5 isometric view of the hollow rod, motor, and release agent main pipe connection of the application Figure 2

[0032] Figure 6 isometric view of the melting box, recycling box, and connecting plate connection of the application Figure 3

[0033] Figure 7 isometric view of the recycling box, sliding block one, sliding block two, and connecting plate connection of the application Figure 6

[0034] Figure 8 isometric view of the structure at A of the application Figure 1

[0035] Figure 9 isometric view of the structure at B of the application Figure 1

[0036] Figure 10 isometric view of the structure at C of the application Figure 1

[0037] Figure 11 isometric view of the structure at D of the application Figure 7

[0038] Figure 12 isometric view of the rotor of the application

[0039] In the figure: 1, workbench; 2, lower mold; 201, middle column; 3, upper mold

[0040] molding mechanism: 4, hydraulic cylinder one; 5, support; 6, positioning rod; 7, spring one; 8, nozzle frame; 9, hydraulic cylinder two; 10, connecting pipe; 11, release agent main pipe; 12, liquid pump; 13, hollow rod; 14, nozzle strip; 15, arc baffle; 17, gear set; 18, motor; 19, top strip; 20, connecting frame; 21, hydraulic cylinder four; 22, inclined guide plate; 23, hydraulic cylinder five

[0041] ​​​​​​​​​​Injection mechanism: 24, melting box; 25, hydraulic cylinder six; 26, discharge port; 27, sealing plate; 28, hydraulic cylinder seven; 29, recycling box; 30, rotating shaft; 31, slider one; 32, protruding block; 33, clamping plate; 34, guide rod; 35, spring two; 36, slider two; 37, screw one; 38, connecting plate; 39, screw two; 40, hydraulic cylinder eight. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments of the present application.

[0043] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0044] Reference Figures 1-12A powder metallurgy rotor forming die and its rotor, comprising a workbench 1, a lower die 2 fixedly installed on the upper end of the workbench 1, a middle column 201 rotatably installed in the middle of the lower die 2, an upper die 3 provided on the upper side of the lower die 2, a forming mechanism for forming the rotor by pressing, a hydraulic cylinder I 4 rotatably installed on the upper end of the middle of the upper die 3, a bracket 5 fixedly installed on the lower end of the workbench 1, a positioning rod 6 slidingly installed on the bracket 5, the positioning rod 6 inserted into the upper die 3 at the lower end, a spring I 7 sleeved on the outer side of the positioning rod 6, the spring I 7 fixedly connected with the positioning rod 6 and the bracket 5 at the upper and lower ends, respectively, a nozzle holder 8 provided between the upper die 3 and the lower die 2, a hydraulic cylinder II 9 fixedly installed on the front end of the nozzle holder 8, the hydraulic cylinder II 9 fixedly installed on the workbench 1 at the lower end, a connecting pipe 10 fixedly and continuously provided on the right end of the middle of the nozzle holder 8, a demolding agent main pipe 11 fixedly and continuously provided on the other end of the connecting pipe 10, a liquid pump 12 provided on the demolding agent main pipe 11, the demolding agent main pipe 11 connected with a demolding agent storage tank outside, a hollow rod 13 rotatably installed on the upper end of the demolding agent main pipe 11, the hollow rod 13 rotatably installed on the workbench 1 at the upper end, and the hollow rod 13 fixedly connected with the middle column 201 at the upper end, a nozzle strip 14 fixedly installed on one side of the inside of the middle column 201, and a channel continuously communicated with the hollow rod 13 and the demolding agent main pipe 11 provided on the inside of the middle column 201 corresponding to the nozzle strip 14, an arc baffle 15 slidingly installed on the upper side of one side of the middle column 201 corresponding to the nozzle strip 14, a motor 18 fixedly installed on the lower end of the workbench 1, a gear set 17 fixedly and mutually meshed installed on the lower end output shaft of the motor 18 and the outer side of the upper end of the hollow rod 13, two top strips 19 slidingly installed on the lower end of the inside of the lower die 2 and the upper end of the workbench 1, the top strips 19 horizontally arranged at the upper end and the lower end of the inside of the lower die 2, a connecting frame 20 fixedly installed on the lower end of the top strips 19, a hydraulic cylinder IV 21 fixedly installed on the workbench 1 at the upper end of the middle of the connecting frame 20, two inclined guide plates 22 symmetrically provided on the lower front side of the nozzle holder 8, the inclined guide plates 22 fixedly connected through a cross strip, a hydraulic cylinder V 23 fixedly installed on the front end of the cross strip and fixedly connected with the nozzle holder 8 at the middle;

[0045] When working, pushing the arc baffle 15 upwards opens the nozzle strip 14, opens the electromagnetic valve on the release agent main pipe 11, closes the electromagnetic valve on the connecting pipe 10, starts the liquid pump 12 to pump out the release agent in the external release agent storage tank through the release agent main pipe 11, through the inside of the hollow rod 13 and the inside of the middle column 201, and finally sprayed out from the nozzle strip 14, sprayed on the inner wall of the lower mold 2, starts the motor 18 to drive the hollow rod 13 and the middle column 201 to rotate through the gear set 17, the middle column 201 drives the nozzle strip 14 to rotate, which is convenient for spraying the release agent evenly on the inner wall of the lower mold 2 in turn, after spraying, push the arc baffle 15 downwards to reset and fix it on the middle column 201 (common clamping rod and clamping slot structure can be used, or built-in electric push rod drive can also be used, both are prior art and will not be described in detail), then close the electromagnetic valve on the release agent main pipe 11 and open the electromagnetic valve on the connecting pipe 10, the release agent is sprayed out through the connecting pipe 10 and the nozzle frame 8, and then the hydraulic cylinder two 9 drives the nozzle frame 8 to move back and forth, which is convenient for spraying the release agent evenly on the lower end of the upper mold 3 and the bottom of the lower mold 2, when the nozzle frame 8 moves to the middle of the lower mold 2, the hydraulic cylinder five 23 drives the horizontal strip and the inclined guide plate 22 to move backward, so that the inclined guide plate 22 moves to the lower side of the two nozzles on the upper part of the middle column 201 on both sides, and then the release agent sprayed by the two nozzles of the nozzle frame 8 will be changed in direction by the inclined guide plate 22 and sprayed on the upper side of the outer surface of the middle column 201, which is convenient for spraying the release agent evenly on the outer surface of the middle column 201, which is beneficial to the subsequent rapid demolding of the rotor after molding, and improves the working efficiency, after spraying, the hydraulic cylinder two 9 drives the nozzle frame 8 to move to the rear side, which does not affect the lowering of the upper mold 3 to press the molded rotor, when the rotor is molded, since the upper mold 3 sprays the release agent, it will drip a certain amount of release agent under the action of gravity, which may affect the normal demolding, when the top strip 19 pushes the rotor to rise from the lower mold 2 and the rotor has not been completely demolded from the lower mold 2, pull the positioning rod 6 upwards, stretch the spring one 7, move the lower end of the positioning rod 6 out of the upper mold 3, rotate the upper mold 3 to rotate on the hydraulic cylinder one 4, which can easily separate the upper end of the upper mold 3 from the rotor, which is beneficial to improve the demolding efficiency of the rotor.

[0046] As one of the embodiments of the present application: also provided with the injection mechanism for injecting molten liquid metal raw material in the lower die 2, the injection mechanism comprises the melting box 24 slidingly installed on the upper end of the workbench 1, the melting box 24 is located at the left side of the lower die 2, the left end of the melting box 24 is fixedly installed with the hydraulic cylinder six 25, the lower end of the hydraulic cylinder six 25 is fixedly installed on the workbench 1, the right end of the melting box 24 is provided with the discharge port 26, the right end of the discharge port 26 is abutted and fitted with the sealing plate 27, the upper end of the sealing plate 27 is fixedly installed with the hydraulic cylinder seven 28, the upper end of the hydraulic cylinder seven 28 is fixedly connected with the melting box 24, the lower front side of the discharge port 26 is provided with the recycling box 29, the front end of the recycling box 29 is fixedly installed with the rotating shaft 30, the rotating shaft 30 is rotatably installed with the sliding block one 31 at the front end, the upper end of the rotating shaft 30 is fixedly installed with the protruding block 32, the upper end of the protruding block 32 is clamped with the clamping plate 33, the upper end of the clamping plate 33 is fixedly installed with the guide rod 34, the guide rod 34 is slidingly installed on the sliding block one 31 at the upper end, the outer side of the guide rod 34 is sleeved with the spring two 35, the front end of the sliding block one 31 is slidingly installed with the sliding block two 36, the middle part of the sliding block one 31 is screwedly installed with the screw rod one 37, the screw rod one 37 is rotatably installed on the sliding block two 36, the front end of the sliding block two 36 is slidingly installed with the connecting plate 38, the sliding block two 36 is screwedly installed with the screw rod two 39, the screw rod two 39 is rotatably installed on the connecting plate 38, the front end of the connecting plate 38 is fixedly installed with the hydraulic cylinder eight 40, the hydraulic cylinder eight 40 is fixedly connected with the front end of the melting box 24;

[0047] When working, the hydraulic cylinder six 25 drives the melting box 24 to move to the right, so that the discharge port 26 is located on the upper side of the mold cavity of the lower mold 2, the hydraulic cylinder seven 28 drives the sealing plate 27 to rise, and the discharge port 26 is opened, the molten metal in the melting box 24 is poured into the mold cavity of the lower mold 2, after the injection is completed, the hydraulic cylinder seven 28 drives the sealing plate 27 to descend, and the discharge port 26 is closed, the hydraulic cylinder six 25 drives the melting box 24 to reset, the hydraulic cylinder one 4 drives the upper mold 3 to descend, and the metal liquid in the lower mold 2 is pressed and formed, after cooling, the hydraulic cylinder one 4 drives the upper mold 3 to rise, the hydraulic cylinder four 21 drives the connecting frame 20 and the top bar 19 to rise, and the rotor cooled and formed in the lower mold 2 is ejected, so that the demolding is completed, convenient and fast, high working efficiency, and the setting of the displacement of the melting box 24 reduces the setting of the injection pipe, so that the problem that the injection pipe is too long and the molten metal liquid flows in the process of melting, heat loss may occur to cause rapid cooling, and the quality of subsequent pressing and forming is affected can be avoided, so that the quality of rotor pressing and forming can be improved, when the sealing plate 27 closes the discharge port 26, the hydraulic cylinder eight 40 drives the connecting plate 38, the sliding block two 36, the sliding block one 31, the rotating shaft 30 and the recovery box 29 to move to the lower side of the discharge port 26, so that the recovery box 29 is located at the lower side of the discharge port 26, the setting of the recovery box 29 facilitates the recovery of the excess metal liquid at the connection between the discharge port 26 and the sealing plate 27, avoids that the excess metal liquid drops on the edge of the mold cavity of the lower mold 2, and affects the normal pressing and forming of the rotor subsequently, the recovery box 29 is provided with a heating device, the metal liquid can be kept in a molten liquid state at any time, the rotating screw two 39 drives the sliding block two 36, the sliding block one 31, the rotating shaft 30 and the recovery box 29 to slide and rise on the connecting plate 38 to the upper end of the melting box 24, and then the rotating screw one 37 drives the sliding block one 31, the rotating shaft 30 and the recovery box 29 to move to the opening of the melting box 24, pulls the guide rod 34 upwards to drive the clamping plate 33 to rise, compresses the spring two 35, so that the clamping plate 33 is separated from the protrusion 32, and finally pushes the recovery box 29 and the rotating shaft 30 to rotate on the sliding block one 31, so that the metal liquid in the recovery box 29 is poured into the melting box 24, facilitating the recovery of the excess metal liquid, saving cost and simple operation.

[0048] A rotor suitable for a forming mold for a powder metallurgy rotor, the rotor is a middle circular hole, and the five corners are arranged in an arc structure at equal intervals.

[0049] Working principle:

[0050] When the present application is used, the arc baffle 15 is pushed upward to open the nozzle strip 14, the electromagnetic valve on the release agent main pipe 11 is opened, the electromagnetic valve on the connecting pipe 10 is closed, the liquid pump 12 is started to draw the release agent in the external release agent storage tank through the release agent main pipe 11, through the inside of the hollow rod 13 and the inside of the middle column 201, and finally sprayed from the nozzle strip 14 to be sprayed on the inner wall of the lower mold 2, the motor 18 is started to drive the hollow rod 13 and the middle column 201 to rotate through the gear set 17, the middle column 201 drives the nozzle strip 14 to rotate, which is convenient for uniformly spraying the release agent on the inner wall of the lower mold 2 in turn, after the spraying is completed, the arc baffle 15 is pushed downward to reset and be fixed on the middle column 201 (common clamping rod and clamping groove structure can be used, or built-in electric push rod drive can also be used, both of which are prior art and will not be described in detail);

[0051] The electromagnetic valve on the release agent main pipe 11 is closed again, the electromagnetic valve on the connecting pipe 10 is opened, the release agent is sprayed through the connecting pipe 10 and the nozzle frame 8, and then the hydraulic cylinder two 9 is started to drive the nozzle frame 8 to reciprocate forward and backward, which is convenient for uniformly spraying the release agent on the lower end of the upper mold 3 and the inner bottom of the lower mold 2, when the nozzle frame 8 moves to the middle part of the lower mold 2, the hydraulic cylinder five 23 is started to drive the horizontal strip and the inclined guide plate 22 to move backward, so that the inclined guide plate 22 moves to the lower side of the two nozzles on the upper part of the middle column 201 on both sides, and then the release agent sprayed by the two nozzles of the nozzle frame 8 will be changed in direction by the inclined guide plate 22 and sprayed on the upper side of the outer surface of the middle column 201, with the rotation of the middle column 201, it is convenient for the release agent to be uniformly sprayed on the outer surface of the middle column 201, which is beneficial to the rapid demolding of the subsequent rotor forming and improves the working efficiency;

[0052] When the rotor is formed, since the upper mold 3 sprays the release agent, a certain amount of release agent will drip downward under the action of gravity, which may affect the normal demolding of the subsequent process, the positioning rod 6 is pulled upward when the top strip 19 pushes the rotor to rise from the lower mold 2 and the rotor has not been completely demolded from the lower mold 2, the lower end of the positioning rod 6 is moved out of the upper mold 3 by pulling the positioning rod 6, the upper mold 3 is rotated on the hydraulic cylinder one 4, so that the upper end of the upper mold 3 and the rotor are separated from each other, which is beneficial to improve the demolding efficiency of the rotor;

[0053] After the spraying is completed, the hydraulic cylinder two 9 drives the nozzle frame 8 to move to the rear side, which does not affect the lowering of the upper mold 3 to press the rotor, the hydraulic cylinder six 25 drives the melting box 24 to move to the right, so that the discharge port 26 is located on the upper side of the mold cavity of the lower mold 2, the hydraulic cylinder seven 28 drives the sealing plate 27 to rise, the discharge port 26 is opened, the molten metal in the melting box 24 is poured into the mold cavity of the lower mold 2, after the injection is completed, the hydraulic cylinder seven 28 drives the sealing plate 27 to descend, the discharge port 26 is closed, the hydraulic cylinder six 25 drives the melting box 24 to reset, the hydraulic cylinder one 4 drives the upper mold 3 to descend, and the metal liquid in the lower mold 2 is pressed and formed, after cooling, the hydraulic cylinder one 4 drives the upper mold 3 to rise, the hydraulic cylinder four 21 drives the connecting frame 20 and the top bar 19 to rise, and the rotor cooled and formed in the lower mold 2 is ejected, so that the demolding is completed, which is convenient, fast, high in working efficiency, and can effectively avoid that the injection pipe is too long, and the molten metal flows, which may cause heat loss to cause rapid cooling, affect the quality of subsequent pressing and forming, and improve the quality of rotor pressing and forming;

[0054] When the sealing plate 27 closes the discharge port 26, the hydraulic cylinder eight 40 drives the connecting plate 38, the slider two 36, the slider one 31, the rotating shaft 30 and the recovery box 29 to move to the lower side of the discharge port 26, so that the recovery box 29 is located at the lower side of the discharge port 26, and the recovery box 29 is arranged to conveniently receive the excess metal liquid at the connection between the discharge port 26 and the sealing plate 27, so as to avoid that the excess metal liquid drops on the edge of the mold cavity of the lower mold 2, and affects the normal pressing and forming of the rotor;

[0055] The recovery box 29 is provided with a heating device, can keep the metal liquid in a molten liquid state, the rotating screw two 39 drives the slider two 36, the slider one 31, the rotating shaft 30 and the recovery box 29 to slide on the connecting plate 38 and rise to the upper end of the melting box 24, the rotating screw one 37 drives the slider one 31, the rotating shaft 30 and the recovery box 29 to move to the upper side of the opening of the melting box 24, the guide rod 34 is pulled upward to drive the clamping plate 33 to rise, the compression spring two 35 is compressed, the clamping plate 33 is separated from the protrusion 32, and finally the recovery box 29 and the rotating shaft 30 are rotated on the slider one 31, so that the metal liquid in the recovery box 29 is poured into the melting box 24, the excess metal liquid is conveniently recovered, the cost is saved, and the operation is simple.

[0056] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A forming die for powder metallurgical rotors comprising a work table (1), characterized in that, The upper end of the workbench (1) is fixedly provided with a lower die (2), the middle part of the lower die (2) is rotatably provided with a middle column (201), and the upper side of the lower die (2) is provided with an upper die (3). Further, a forming mechanism for pressing and forming the rotor is arranged, the upper end of the upper die (3) is rotatably provided with a hydraulic cylinder (4), the middle part of the hydraulic cylinder (4) is fixedly provided with a support (5), the lower end of the support (5) is fixedly provided on the workbench (1), the support (5) is slidably provided with a positioning rod (6), the lower end of the positioning rod (6) is inserted into the upper die (3), the outer side of the positioning rod (6) is sleeved with a spring (7), the upper and lower ends of the spring (7) are fixedly connected with the positioning rod (6) and the support (5) respectively, the upper die (3) is provided with a nozzle frame (8) between the lower die (2), the front end of the nozzle frame (8) is fixedly provided with a hydraulic cylinder (9), and the lower end of the hydraulic cylinder (9) is fixedly provided on the workbench (1). Further, a material injection mechanism for injecting molten liquid metal raw materials into the lower die (2) is arranged, the material injection mechanism comprises a melting box (24) slidably provided on the upper end of the workbench (1), the melting box (24) is located at the left side of the lower die (2), the left end of the melting box (24) is fixedly provided with a hydraulic cylinder (25), and the lower end of the hydraulic cylinder (25) is fixedly provided on the workbench (1).

2. The forming die for powder metallurgy rotors according to claim 1, characterized in that, The middle part of the right end of the nozzle frame (8) is fixedly and communicatively provided with a connecting pipe (10), the other end of the connecting pipe (10) is fixedly and communicatively provided with a releasing agent main pipe (11), the releasing agent main pipe (11) is provided with a liquid pump (12), and the lower end of the releasing agent main pipe (11) is connected with an external releasing agent storage tank.

3. The forming die for powder metallurgy rotors according to claim 2, characterized in that, The upper end of the releasing agent main pipe (11) is rotatably provided with a hollow rod (13), the upper end of the hollow rod (13) is rotatably provided on the workbench (1), the upper end of the hollow rod (13) is fixedly connected with the middle column (201), one side of the inside of the middle column (201) is fixedly provided with a nozzle strip (14), and the inside of the middle column (201) is provided with a channel corresponding to the nozzle strip (14), the channel is in communication with the hollow rod (13) and the releasing agent main pipe (11).

4. The forming die for powder metallurgy rotors according to claim 1, characterized in that, The other side of the middle column (201) is slidably provided with an arc baffle (15) corresponding to the nozzle strip (14), the lower end of the workbench (1) is fixedly provided with a motor (18), the lower end output shaft of the motor (18) and the outer side of the hollow rod (13) are fixedly provided with a gear set (17) in meshing engagement.

5. The forming die for powder metallurgy rotors according to claim 1, characterized in that, The lower end of the lower die (2) and the upper end of the workbench (1) are slidably provided with two top strips (19), the upper end of the top strip (19) is horizontally arranged with the bottom end of the lower die (2), the lower end of the top strip (19) is fixedly provided with a connecting frame (20), the middle part of the upper end of the connecting frame (20) is fixedly provided with a hydraulic cylinder (21), and the upper end of the hydraulic cylinder (21) is fixedly provided on the workbench (1).

6. The forming die for powder metallurgy rotors according to claim 1, characterized in that, The lower front side of the nozzle frame (8) is symmetrically provided with two inclined guide plates (22), the inclined guide plates (22) are fixedly connected through a cross strip, the front end of the cross strip is fixedly provided with a hydraulic cylinder (23), and the middle part of the hydraulic cylinder (23) is fixedly connected with the nozzle frame (8).

7. The forming die for powder metallurgy rotors according to claim 1, characterized in that, The lower side of the right end of the melting tank (24) is provided with a discharge port (26), the right end of the discharge port (26) is abutted and fitted with a sealing plate (27), the upper end of the sealing plate (27) is fixedly installed with a hydraulic cylinder seven (28), and the upper end of the hydraulic cylinder seven (28) is fixedly connected with the melting tank (24).

8. The forming die for powder metallurgy rotors according to claim 7, characterized in that, The lower front side of the discharge port (26) is provided with a recycling box (29), the front end of the recycling box (29) is fixedly installed with a rotating shaft (30), the front end of the rotating shaft (30) is rotatably installed with a sliding block one (31), the upper end of the rotating shaft (30) is fixedly installed with a protruding block (32), the upper end of the protruding block (32) is clamped with a clamping plate (33), the upper end of the clamping plate (33) is fixedly installed with a guide rod (34), the upper end of the guide rod (34) is slidably installed on the sliding block one (31), and the outer side of the guide rod (34) is externally sleeved with a spring two (35).

9. The forming die for powder metallurgy rotors according to claim 8, characterized in that, The front end of the sliding block one (31) is slidably installed with a sliding block two (36), the middle part of the sliding block one (31) is screwedly installed with a screw rod one (37), and the screw rod one (37) is rotatably installed on the sliding block two (36).

10. The forming die for powder metallurgy rotors according to claim 9, characterized in that, The front end of the sliding block two (36) is slidably installed with a connecting plate (38), the sliding block two (36) is screwedly installed with a screw rod two (39), the screw rod two (39) is rotatably installed on the connecting plate (38), the front end of the connecting plate (38) is fixedly installed with a hydraulic cylinder eight (40), and the hydraulic cylinder eight (40) is fixedly connected with the front end of the melting tank (24).

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