A powder metallurgy forming device for automobile gears and gears made therefrom

Abstract

The present invention relates to the field of powder metallurgy technology, specifically a powder metallurgy forming device for automobile gears and the gears made thereof, comprising a base, a mold mechanism for shaping powder, a supporting mechanism for receiving powder, and a toggle mechanism for adjusting the position of the mold mechanism. In the present invention, a mold cavity is formed by utilizing a mold mechanism, and the mold mechanism is disassembled into a plurality of thinner cavities of equal thickness by utilizing a supporting mechanism in conjunction with a toggle mechanism. The plurality of thinner cavities are filled with metal powder by utilizing a powder feeding mechanism, and the powders in the plurality of thinner cavities are pressed in sequence by utilizing a pressing mechanism so that the pressure on the top and bottom of the thinner cavities is more uniform, and the pressing distance of the pressing mechanism is controlled to control the compactness of the powder, and then the plurality of thinner cavities are merged into a thicker cavity by utilizing a toggle mechanism in conjunction with a supporting mechanism, and then the powder in the thicker cavity is pressed to form a green compact, so that the pressure on the powder is more uniform.

Description

Technical Field

[0001] The invention relates to the technical field of powder metallurgy, in particular to a powder metallurgy forming device for automobile gears and the gears made therefrom. Background Art

[0002] Powder metallurgy can be used to manufacture parts such as gears. By adding a binder or lubricant to metal powder to improve its fluidity, the metal powder is then placed in a mold. Pressure is applied to the metal powder in the mold to form a green body. The green body is then heated and degreased, and the degreased green body is sintered to obtain a finished product. However, during the process of pressing the metal powder into a green body, the pressing equipment generally used in powder metallurgy applies pressure to the metal powder in the mold from above, with the pressure being transmitted from the top to the bottom of the mold. Due to the fluidity of the powder and the design of the mold, the pressure distribution may be uneven, resulting in greater pressure and higher density at the top of the powder, while the density at the bottom is lower. This difference is particularly obvious when the required parts are thicker, and the metal powder at the top is more compacted. Excessive compaction can easily affect the escape of lubricants and binders inside the green body during degreasing. Moreover, after sintering, the density of the top and bottom of the product is also prone to different densities due to the different compaction, which is more inconvenient. Summary of the Invention

[0003] The object of the present invention is to provide a powder metallurgy forming device for automobile gears and the gears made therefrom, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A powder metallurgy forming device for automobile gears, comprising:

[0006] A base, a mold mechanism for shaping powder, a supporting mechanism for receiving powder, a toggle mechanism for adjusting the position of the mold mechanism, a pressing mechanism for pressing the powder to form it, and a powder feeding mechanism for feeding. A hydraulic cylinder is fixedly connected to the bottom of one end of the base. The mold mechanism is located above the base. The mold mechanism includes a plurality of vertically stacked plates, and a cavity is opened at the center of the top surface of the plurality of plates. The supporting mechanism is located below the plurality of plates. The supporting mechanism includes a plurality of bottom boxes arranged in sequence along the long side of the top surface of the base, and the plurality of bottom boxes are all located on the top surface of the base. The top surface of the base is fixedly connected to a frame The frame body is provided with a plurality of bottom boxes, and the frame body is provided with a plurality of slide grooves on opposite sides thereof, and the plurality of slide grooves on the same side of the frame body correspond to the plurality of bottom boxes one by one, and the plurality of bottom boxes are fixedly connected with sliders on opposite sides thereof, and the sliders are slidably engaged with the adjacent slide grooves, and the top surfaces of the plurality of bottom boxes are provided with sleeve holes, and the plurality of sleeve holes are slidably sleeved with shaft rods, and the interiors of the plurality of bottom boxes are provided with electric push rods, and the movable ends of the plurality of electric push rods are fixedly connected to the bottom ends of adjacent shaft rods, the toggle mechanism is located inside the frame body, the pressing mechanism is located below the toggle mechanism, and the powder feeding mechanism is located at one end of the frame body.

[0007] Furthermore, two guide rods are provided on opposite sides of the frame, and multiple sleeves are provided on the outer walls of the two guide rods, wherein the inner wall of the sleeve at one end on the two guide rods is fixedly sleeved with the outer wall of the adjacent guide rod, and a rotating plate is rotatably connected between the two sleeves at the other ends of the two guide rods, and the bottom surface of the rotating plate is fixedly connected to the movable end of the hydraulic cylinder, and except the sleeve at the other end of any guide rod, the other sleeves correspond to multiple bottom boxes one-to-one, and except the sleeve at the other end of any guide rod, the outer walls of the other sleeves are rotatably connected to one end of the adjacent slider, and except the sleeve at one end of any guide rod, the inner walls of the other sleeves are slidably sleeved with the outer walls of the adjacent guide rod, and the bottom surface of a bottom box located at one end inside the frame is fixedly connected to the top surface of the base.

[0008] Furthermore, the tops of two opposite sides of any base box are fixedly connected with L-shaped frames, one side of a long arm of any L-shaped frame is fixedly connected with a first cylinder, and the movable end of any first cylinder is fixedly connected with a stop plate.

[0009] Furthermore, the toggle mechanism includes:

[0010] The two cams are connected to each other by a threaded hole, and the two cams are connected to each other with a screw thread on one end and a screw thread on the other end.

[0011] Furthermore, one end of the two screw rods passes through the adjacent side walls of the frame and is fixedly sleeved with a pulley, and a transmission belt is rotatably sleeved between the outer side walls of the two pulleys, one end of the frame is fixedly connected to a drive box, and a drive motor is provided inside the drive box, and the motor shaft of the drive motor is fixedly connected to the other end of a screw rod.

[0012] The invention further comprises: a second cylinder is fixedly connected to the top surface of the movable plate, and a movable end of the second cylinder is fixedly connected to the center of the bottom surface of the square plate.

[0013] Furthermore, the outer side walls of the four slide rods are slidably sleeved with a pressure ring, and the inner side walls of the four pressure rings are fixedly connected with two protruding rods, and the two protruding rods inside any pressure ring are slidably clamped inside the two card slots on the adjacent slide rods.

[0014] Furthermore, the pressing mechanism includes:

[0015] Two rails, a card plate, a main cylinder, a connecting rod, a die, a plurality of L-shaped rods and screw rods, the two rails are fixedly connected between the two ends inside the frame, the card plate is slidably connected between the two rails, and the card plate is located below the movable plate, the main cylinder is fixedly connected to the bottom surface of the card plate, the top end of the connecting rod is fixedly connected to the movable end of the main cylinder, the outer side wall of the connecting rod is slidably sleeved with a collar, and the top end of the connecting rod is fixedly connected to two auxiliary cylinders, the movable ends of the two auxiliary cylinders are fixedly connected to the top surface of the collar, the center of the top surface of the die is fixedly connected to the bottom end of the connecting rod, the outer side wall of the die is provided with a plurality of notches, and the top surface of the die is fixedly connected to a plurality of connecting frames, and the plurality of connecting frames are connected to a plurality of The notches correspond one to one, and the multiple L-shaped rods correspond one to one with the multiple notches. The multiple L-shaped rod short arms are movably inserted into the adjacent notches, and the multiple L-shaped rod long arms are slidably sleeved with the adjacent connecting frames. One end of the multiple L-shaped rod long arms is rotatably connected to a rotating rod, and one end of the multiple rotating rods is rotatably connected to the outer wall of the collar. The screw rod is rotatably connected between the two ends inside the frame. One end of the screw rod passes through the other end of the frame, and the other end of the frame is fixedly connected to a power box. A power motor is provided inside the power box, and the motor shaft of the power motor is fixedly connected to one end of the screw rod. A screw through hole is opened at one end of the card plate, and the inner side wall of the screw through hole is screwed together with the outer side wall of the screw rod.

[0016] Furthermore, the powder feeding mechanism includes:

[0017] The shell has an open bottom surface and both ends of the shell are arc-shaped surfaces. A communication port is provided at one end of the frame, and the shell is located inside the communication port. The bottom surface of the square tube is fixedly connected to the top surface of the shell. A plurality of connecting pipe ports are provided on the top surface of the shell, and the plurality of connecting pipe ports are connected to the inside of the square tube. The square tube is fixedly connected to guide rails on opposite sides. The shell is located inside the communication port. A plurality of guide wheels are provided at both ends of the top surface of the shell, and both guide rails are located inside the shell. Between the two ends of the top surface, an axle is fixedly sleeved inside any guide wheel, and the axle of any guide wheel is rotatably connected to the top surface of the sleeve, and the outer side wall of any guide wheel is slidably engaged inside the adjacent guide rail. The top surface of the sleeve is fixedly connected to a motor box, and a servo motor is provided inside the motor box. The motor shaft of the servo motor is fixedly connected to the axle of the adjacent guide wheel, and the two third cylinders are fixedly connected to one end of the frame, and the opposite sides of the sleeve are fixedly connected to support plates, and the movable ends of the two third cylinders are respectively fixedly connected to the bottom surfaces of the two support plates.

[0018] The gear is formed by the powder metallurgy forming device.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. By utilizing the mold mechanism to form a mold cavity, when manufacturing thicker gears, the mold mechanism is disassembled into multiple thinner cavities of equal thickness by utilizing the supporting mechanism in conjunction with the toggle mechanism, and then the multiple thinner cavities are filled with metal powder by utilizing the powder feeding mechanism, and then the powder in the multiple thinner cavities is pressed in sequence by the pressing mechanism, so that the pressure on the powder at the top and bottom of the thinner cavity is more uniform, and the pressing distance of the pressing mechanism is controlled to control the compactness of the powder, and then the multiple thinner cavities are merged into a thicker cavity by utilizing the toggle mechanism in conjunction with the supporting mechanism, and then the powder in the thicker cavity is pressed to form a green body, so that the pressure on the powder is more uniform, which is convenient for controlling the density of the gear and the compactness of the green body.

[0021] 2. Start the hydraulic cylinder to drive the rotating plate to move up, so that the rotating plate pushes the two guide rods to tilt, so that the multiple bottom boxes are driven by the two guide rods to form a stepped structure, and then start the second cylinder to move the multiple sliding rods down and insert them into the sockets on the multiple plate bodies, and then start the driving motor to drive the two screws to rotate, drive the moving plate to move, so that the sliding rod drives the multiple plate bodies to move synchronously. When the plate body moves to the drop difference between two adjacent bottom boxes and is abutted by the side wall of the bottom box, the second cylinder is started to move up, so that the sliding rod is separated from the abutted plate body, until there are an equal number of plate bodies on each bottom box, and the first cylinder is started so that the upper plate body of the bottom box is clamped and fixed by the two adjacent abutting plates, and then the hydraulic cylinder is started to drive the multiple bottom boxes to return to parallelism, so that the multiple plate bodies on each bottom box are parallel;

[0022] 3. Start the servo motor to drive the shell into the frame, and then start the two third cylinders to drive the shell to cover the cavity formed by the upper plates of the multiple bottom boxes. Then use the automatic feeding hopper to put the powder into the cavity, and then start the servo motor to drive the shell to move, so that the shell can scrape off the powder exposed on the plate, making it easier for the pressing mechanism to press down;

[0023] 4. By starting the main cylinder to drive the die to press down, the die presses the cavity formed by the upper plate of the bottom box. Since the cavity is thin, the powder in the cavity is subjected to more uniform pressure, and the pressure of the die is controlled to control the compactness of the powder in the thinner cavity. After the powder is pressed down, the effect of the plate above the top surface of the powder disappears, and then the two auxiliary cylinders are started to drive multiple L-shaped rods to move synchronously to resist the plate that has lost its function. Then, starting the main cylinder can make the die take the plate that has lost its function away from the top of the bottom box, and then press the powder in multiple thinner cavities in turn, and then use the toggle mechanism to cooperate with the supporting mechanism to merge the multiple thinner cavities into a thicker cavity, and then use the die to press the thicker cavity as a whole, so that the powder in multiple thinner cavities is compressed and combined to form a green body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a structural diagram of the supporting mechanism in the present invention;

[0026] Figure 3 It is a structural diagram of the supporting mechanism and the mold mechanism in the present invention;

[0027] Figure 4 This is a schematic diagram of the internal cross-sectional structure of the bottom box of the present invention;

[0028] Figure 5 It is a structural schematic diagram of the toggle mechanism in the present invention;

[0029] Figure 6 It is a schematic diagram of the structure of the sliding rod, the pressure ring and the movable plate in the present invention;

[0030] Figure 7 It is a schematic structural diagram of the downward pressing mechanism in the present invention;

[0031] Figure 8 This is an exploded view of the downward pressing mechanism structure of the present invention;

[0032] Figure 9 It is an exploded diagram of the feeding mechanism structure in the present invention;

[0033] Figure 10 It is a schematic diagram of the gear structure in the present invention.

[0034] In the figure: 100, base; 110, hydraulic cylinder; 200, mold mechanism; 210, plate; 211, socket; 300, supporting mechanism; 310, bottom box; 311, slider; 320, shaft; 330, frame; 331, slide; 332, connecting port; 340, guide rod; 341, sleeve; 342, rotating plate; 350, first cylinder; 351, abutment plate; 400, toggle mechanism; 410, movable plate; 411, slide hole; 420, screw; 421, drive box; 430, slide; 431, slot; 440, Pressing ring; 441, protruding rod; 450, second cylinder; 500, pressing mechanism; 510, clamping rail; 520, clamping plate; 530, main cylinder; 540, connecting rod; 541, sleeve ring; 542, auxiliary cylinder; 550, die; 551, notch; 552, connecting frame; 560, L-shaped rod; 561, rotating rod; 570, screw rod; 571, power box; 600, powder feeding mechanism; 610, housing; 620, square tube; 621, guide rail; 630, sleeve; 631, guide wheel; 632, motor box; 640, third cylinder. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] See also Figure 1-10 In an embodiment of the present invention, a powder metallurgy forming device for an automobile gear includes:

[0037] A base 100, a mold mechanism 200 for shaping powder, a supporting mechanism 300 for receiving powder, a toggle mechanism 400 for adjusting the position of the mold mechanism 200, a pressing mechanism 500 for pressing the powder to form it, and a powder feeding mechanism 600 for feeding. A hydraulic cylinder 110 is fixedly connected to the bottom of one end of the base 100. The mold mechanism 200 is located above the base 100. The mold mechanism 200 includes a plurality of vertically stacked plates 210, and a cavity is opened at the center of the top surface of the plurality of plates 210. The supporting mechanism 300 is located below the plurality of plates 210. The supporting mechanism 300 includes a plurality of bottom boxes 310 arranged in sequence along the long side of the top surface of the base 100, and the plurality of bottom boxes 310 are all located on the top surface of the base 100. The top surface of the base 100 is fixedly connected There is a frame 330, and multiple bottom boxes 310 are located inside the frame 330, and multiple slide grooves 331 are opened on opposite sides of the frame 330. The multiple slide grooves 331 on the same side of the frame 330 correspond one-to-one to the multiple bottom boxes 310. The multiple bottom boxes 310 are fixedly connected with sliders 311 on opposite sides, and the sliders 311 are slidably engaged in the adjacent slide grooves 331. The top surfaces of the multiple bottom boxes 310 are opened with sleeve holes, and the multiple sleeve holes are slidably sleeved with shafts 320. Electric push rods are provided inside the multiple bottom boxes 310, and the movable ends of the multiple electric push rods are fixedly connected to the bottom ends of adjacent shafts 320. The toggle mechanism 400 is located inside the frame 330, the pressing mechanism 500 is located below the toggle mechanism 400, and the powder feeding mechanism 600 is located at one end of the frame 330.

[0038] Specifically, a mold cavity is formed by utilizing the cavities on a plurality of vertically stacked plates 210, and the supporting mechanism 300 is used to support the bottom of the mold cavity and seal the bottom of the cavity. Then, metal powder is placed into the cavity and pressed down by the pressing mechanism 500 to form the powder in the cavity into a green body. When thicker gears are produced, the toggle mechanism 400 can be used to divide the plurality of plates 210 into a plurality of parts. Each part of the plates 210 is vertically stacked to form a thinner mold cavity, and each part of the thinner cavity is located on a different bottom box 310. Then, the metal powder is fed into each bottom box 310 by the powder feeding mechanism 600. The thinner cavities are stacked vertically into a thicker cavity by the toggle mechanism 400, and the thicker cavity is pressed again by the downward pressing mechanism 500, so that the metal powder in each thinner cavity is pressed for the first time and preliminarily formed. The metal powder in each thinner cavity is pressed more evenly. Then, the multiple thinner cavities are stacked vertically into a thicker cavity by the toggle mechanism 400, and the thicker cavity is pressed again by the downward pressing mechanism 500, so that the metal powder in each thinner cavity that has been pressed for the first time is pressed again and combined together, so that the pressure on the powder in each part of the pressed green body is more uniform, and the density of the manufactured gear is more uniform. Example 1

[0039] like Figure 2-3 As shown, in this embodiment, two guide rods 340 are provided on opposite sides of the frame 330, and multiple sleeves 341 are provided on the outer walls of the two guide rods 340, wherein the inner wall of the sleeve 341 at one end of the two guide rods 340 is fixedly sleeved with the outer wall of the adjacent guide rod 340, and a rotating plate 342 is rotatably connected between the two sleeves 341 at the other end of the two guide rods 340, and the bottom surface of the rotating plate 342 is fixedly connected to the movable end of the hydraulic cylinder 110. Except for the sleeve 341 at the other end of any guide rod 340, the other sleeves 341 correspond to multiple bottom boxes 310 one by one, and any guide rod 340 Except for the sleeve 341 located at the other end of the rod 340, the outer side walls of the other sleeves 341 are rotatably connected to one end of the adjacent slider 311. Except for the sleeve 341 located at one end of any guide rod 340, the inner side walls of the other sleeves 341 are slidably connected to the outer side walls of the adjacent guide rod 340. The bottom surface of a base box 310 located at one end inside the frame 330 is fixedly connected to the top surface of the base 100. The tops of the opposite sides of any base box 310 are fixedly connected to L-shaped frames. One side of the long arm of any L-shaped frame is fixedly connected to the first cylinder 350, and the movable end of any first cylinder 350 is fixedly connected to the abutment plate 351.

[0040] In this embodiment, in the initial state, the two guide rods 340 are in a straight state, and the multiple bottom boxes 310 are in a parallel state. The inner wall of the sleeve 341 at one end of any guide rod 340 is fixedly sleeved with the outer wall of the guide rod 340, and the inner walls of the other sleeves 341 are slidably sleeved with the outer wall of the guide rod 340. When it is necessary to divide the thick cavity formed by the multiple plates 210 into multiple thinner cavities, the hydraulic cylinder 110 is activated to drive the rotating plate 342 to move upward. Since the bottom box 310 at one end of the frame 330 is fixedly connected to the base 100, the bottom box 310 at one end of the frame 330 is fixedly connected to the base 100. When the other end of the guide rod 340 is lifted by the rotating plate 342, one end of the two guide rods 340 will rotate around the sleeve 341 at one end of itself, thereby tilting the two guide rods 340 and relying on the other sleeves 341 on the guide rods 340 to synchronously lift the other bottom boxes 310, and form a stepped structure of multiple bottom boxes 310, so that the bottom box 310 closest to the other end of the guide rod 340 is lifted the highest, and the height difference between each bottom box 310 is equal, and then the toggle mechanism 400 is used to move the multiple vertically stacked plates 210, and the plates 210 pass through two adjacent When the bottom boxes 310 are between each other, the same number of plates 210 will be blocked by the side wall of the bottom box 310 located at a higher position between the two adjacent bottom boxes 310 and stop moving, so that the number of plates 210 distributed on each bottom box 310 is equal, and then the hydraulic cylinder 110 is started to reset, so that the two guide rods 340 drive the multiple bottom boxes 310 to return to the initial state, and then the user can start the electric push rod in the bottom box 310 to drive the adjacent shaft rods 320 to move, so that the top of the shaft rod 320 is parallel to the top surface of the uppermost plate 210, so that when the metal powder is filled into the thinner cavity, the shaft rod An axial hole for the initially pressed green body can be formed at 320, and when multiple thinner cavities are merged into a thicker cavity, the height of the shaft rod 320 can be controlled by starting the electric push rod, so that the shaft rod 320 in the thicker cavity can form an axial hole in the pressed green body during pressing, and after the plate body 210 moves to the bottom box 310, multiple first cylinders 350 can be started to drive the adjacent abutment plates 351 to move, so that the multiple plate bodies 210 on the bottom box 310 can be clamped and fixed by two adjacent abutment plates 351, thereby preventing the plate body 210 from moving when the pressing mechanism 500 is pressed.

[0041] like Figure 5-6 As shown, in this embodiment, the toggle mechanism 400 includes:

[0042] The movable plate 410, two screw rods 420 and four slide rods 430, the four corners of the top surface of the movable plate 410 are provided with sliding holes 411, the two screw rods 420 are rotatably connected between the two ends of the interior of the frame 330, one end of the movable plate 410 is provided with two threaded holes, and the inner side walls of the two threaded holes are respectively screwed with the outer side walls of the two screw rods 420, the outer side walls of the four slide rods 430 are respectively slidably sleeved inside the four sliding holes 411, and the outer side walls of the four slide rods 430 are provided with two card holes. Groove 431, and the inner walls of the four sliding holes 411 are fixedly connected to two convex strips, the two convex strips inside any sliding hole 411 are slidably engaged with the two card slots 431 on the adjacent sliding rod 430, and the four corners of the top surface of any plate body 210 are provided with insertion holes 211, and the four sliding rods 430 are respectively slidably engaged with the four insertion holes 211 on any plate body 210, and a square plate is provided on the top of the four sliding rods 430, and the tops of the four sliding rods 430 are fixedly connected to the bottom surface of the square plate.

[0043] In the specific implementation, in the initial state, multiple vertically stacked plate bodies 210 are all located above a bottom box 310. After the hydraulic cylinder 110 is started to form a stepped structure of multiple bottom boxes 310, a bottom box 310 is located at the lowest position among the multiple bottom boxes 310. The user can slide the square plate to drive the four slide bars 430 to synchronously insert into the sockets 211 on the multiple vertically stacked plate bodies 210, and then drive the movable plate 410 to move by rotating the two screws 420, so that the slide bars 430 drive the multiple plate bodies 210 to move toward the bottom box 310 located at the top. During the movement, a bottom box 310 is located at the lowest position among the multiple bottom boxes 310. The upper part of the plate 210 of the box 310 will be abutted by the side wall of the adjacent bottom box 310, and then the slide bar 430 will be disengaged from the insertion hole 211 on the abutted plate 210 by sliding up, driving the other plate 210 to continue to move. Then, when the other moving plate 210 abuts the side wall of the bottom box 310 at a higher position, the slide bar 430 will be further disengaged from the abutting plate 210 by sliding up until a plate 210 abuts against the other end of the frame 330, thereby dividing the plate 210 into two equal parts by the height difference between the bottom boxes 310, so that each bottom box 310 has the same number of plates 210.

[0044] like Figure 5-6As shown, in this embodiment, one end of the two screw rods 420 passes through the side walls of the adjacent frame 330 and is fixedly sleeved with a pulley, and a transmission belt is rotatably sleeved between the outer walls of the two pulleys, one end of the frame 330 is fixedly connected to a drive box 421, and a drive motor is provided inside the drive box 421, and the motor shaft of the drive motor is fixedly connected to the other end of a screw rod 420, the top surface of the movable plate 410 is fixedly connected to the second cylinder 450, and the movable end of the second cylinder 450 is fixedly connected to the center of the bottom surface of the square plate, the outer walls of the four sliding rods 430 are slidably sleeved with a pressure ring 440, and the inner walls of the four pressure rings 440 are fixedly connected with two protruding rods 441, and the two protruding rods 441 inside any pressure ring 440 are slidably engaged with the two card grooves 431 on the adjacent sliding rods 430.

[0045] The second cylinder 450 can be started to drive the four slide bars 430 to completely separate from the plate body 210, and the slide bar 430 can use the slot 431 to lift the protruding rod 441 on the pressure ring 440 to drive the pressure ring 440 to separate from the plate body 210.

[0046] like Figure 7-8 As shown, in this embodiment, the pressing mechanism 500 includes:

[0047] The two clamping rails 510, the clamping plate 520, the main cylinder 530, the connecting rod 540, the die 550, a plurality of L-shaped rods 560 and the screw rod 570, the two clamping rails 510 are fixedly connected between the two ends of the frame 330, the clamping plate 520 is slidably clamped between the two clamping rails 510, and the clamping plate 520 is located below the movable plate 410, the main cylinder 530 is fixedly connected to the bottom surface of the clamping plate 520, the top of the connecting rod 540 is fixedly connected to the movable end of the main cylinder 530, the outer wall of the connecting rod 540 is slidably sleeved with a collar 541, and the top of the connecting rod 540 is fixedly connected to two auxiliary cylinders 542, the movable ends of the two auxiliary cylinders 542 are fixedly connected to the top surface of the collar 541, the top center of the die 550 is fixedly connected to the bottom end of the connecting rod 540, the outer wall of the die 550 is provided with a plurality of notches 551, and the top surface of the die 550 is fixedly connected to a plurality of connecting frames 552, a plurality of connecting rods The connecting frame 552 corresponds to the multiple notches 551 one by one, and the multiple L-shaped rods 560 correspond to the multiple notches 551 one by one. The short arms of the multiple L-shaped rods 560 are all movably inserted into the adjacent notches 551, and the long arms of the multiple L-shaped rods 560 are all slidably sleeved with the adjacent connecting frame 552. One end of the long arm of the multiple L-shaped rods 560 is rotatably connected to the rotating rod 561, and one end of the multiple rotating rods 561 is rotatably connected to the outer wall of the collar 541. The screw rod 570 is rotatably connected between the two ends of the interior of the frame 330. One end of the screw rod 570 passes through the other end of the frame 330, and the other end of the frame 330 is fixedly connected to the power box 571. A power motor is provided inside the power box 571, and the motor shaft of the power motor is fixedly connected to one end of the screw rod 570. A screw through hole is opened at one end of the clamping plate 520, and the inner side wall of the screw through hole is screwed with the outer wall of the screw rod 570. The gear powder metallurgy molding device is processed and formed.

[0048] During specific implementation, the shape of the die 550 is the same as the shape of the cavity on the plate body 210, and there is a hole in the center of the bottom surface of the die 550 for inserting the shaft rod 320. In the initial state, the short arms of multiple L-shaped rods 560 are all stuck in the adjacent notches 551 to keep the shape of the die 550 intact. An equal number of plates 210 are stacked on multiple bottom boxes 310, and after the plates 210 are clamped by adjacent abutment plates 351, the powder feeding mechanism 600 is used to feed metal powder into the thinner cavity in the plate body 210, and then the main cylinder 530 is started to drive the die 550 to descend, so that the die 550 presses the metal powder in the cavity of the plate body 210 for preliminary pressing. After the die 550 presses the powder to a certain extent, the two auxiliary cylinders 542 can be started to drive The collar 541 moves downward, causing the collar 541 to contact the multiple short arms of the L-shaped rods 560 through the rotating rod 561 and move synchronously, so that the multiple short arms of the L-shaped rods 560 tightly contact the inner wall of the cavity of the adjacent plate body 210, and the metal powder in the cavity is all located below the plate body 210 contacted by the L-shaped rod 560, and then the main cylinder 530 is started to drive the die 550 to reset, so that the die 550 and the plate body 210 separated from the powder are synchronously moved upward. At this time, the first cylinder 350 can be started to stop the plate 351 from clamping the plate body 210. After the plate body 210 is driven to move upward by the die 550, the plate 351 is started to reset. At the same time, the electric push rod in the bottom box 310 is started to make the top of the shaft rod 320 flush with the top of the metal powder, and then the power motor is started to drive the screw rod 570 to rotate. The pressing die 550 is moved to move the card plate 520 so that the pressing die 550 moves to the top of the other plates 210, and when the pressing die 550 is pressed down, the plate 210 carried by the pressing die 550 is temporarily placed on the top of the other plates 210, and then after pressing down, the plate 210 on the other plates 210 that is not in contact with the powder is taken away, and then when multiple thinner cavities are merged, the hydraulic cylinder 110 is started to make the multiple bottom boxes 310 in a stepped shape, and the height difference between two adjacent bottom boxes 310 is equal to the height of the remaining plate 210 on the bottom box 310, and then the toggle mechanism 400 is used to move the upper plate 210 of the bottom box 310, so that the upper plates 210 of the multiple bottom boxes 310 are stacked on one bottom box 310, and then the pressing die 550 is used to press the powder in the upper plate 210 of one bottom box 310. When the metal powder in the thinner cavity is initially pressed by the die 550, the metal powder in the thinner cavity at the bottom after the merger can be pressed to increase its compactness, while the powder in other cavities can be pressed looser, so that when the thinner cavities are merged into a thicker cavity, the die 550 presses the metal powder in the thicker cavity from above, and the powder compactness at the top and bottom of the thicker cavity is similar, so that the metal powder in the cavity is evenly compressed and the compactness of the powder is controlled.At the same time, when the die 550 is pressed down, the extra plate 210 it carries can be placed on the plate 210 on a bottom box 310. After use, the user can manually remove the green body in the cavity. Alternatively, an ejection device can be set on a bottom box 310 to eject the green body. The ejection device is a prior art and will not be described in detail here. Example 2

[0049] On the basis of the first embodiment, a powder feeding mechanism 600 is provided to smooth the powder in the cavity.

[0050] like Figure 9 As shown, in this embodiment, the powder feeding mechanism 600 includes:

[0051] The shell 610, the square tube 620, the sleeve 630 and the two third cylinders 640, the shell 610 is an open bottom structure, and both ends of the shell 610 are arc-shaped surfaces, a connecting port 332 is opened at one end of the frame 330, and the shell 610 is located inside the connecting port 332, the bottom surface of the square tube 620 is fixedly connected to the top surface of the shell 610, the top surface of the shell 610 is opened with multiple connecting pipe openings, and the multiple connecting pipe openings are connected to the inside of the square tube 620, the opposite sides of the square tube 620 are fixedly connected with guide rails 621, the sleeve 630 is located inside the connecting port 332, and multiple guide wheels 631 are set at both ends of the top surface of the sleeve 630, and the two guide rails 6 21 are both located between the two ends of the inner top surface of the casing 630, a wheel axle is fixedly sleeved inside any guide wheel 631, and the wheel axle of any guide wheel 631 is rotatably connected to the inner top surface of the casing 630, and the outer side wall of any guide wheel 631 is slidably engaged inside the adjacent guide rail 621, a motor box 632 is fixedly connected to the top surface of the casing 630, and a servo motor is provided inside the motor box 632, and the motor shaft of the servo motor is fixedly connected to the wheel axle of the adjacent guide wheel 631, the two third cylinders 640 are both fixedly connected to one end of the frame 330, and support plates are fixedly connected to the opposite sides of the casing 630, and the movable ends of the two third cylinders 640 are respectively fixedly connected to the bottom surfaces of the two support plates.

[0052] During specific implementation, the discharge port of the automatic feeding hopper is connected to the pipeline, and the pipeline is connected to the connecting pipe port through the square tube 620. When multiple bottom boxes 310 are placed flat, the user can adjust the height of the shell 610 by starting the two third cylinders 640, and then start the servo motor to drive the adjacent guide wheels 631 to rotate, and send the square tube 620 together with the shell 610 into the interior of the frame 330, so that the bottom of the shell 610 covers the cavity of the upper plate 210 of the multiple bottom boxes 310, and then the powder is transported to the interior of the shell 610 through the automatic feeding hopper, and then the servo motor is started to move the shell 610 to scrape the powder on the multiple plate bodies 210, so that the powder in the cavity is scraped flat. When in use, a vibration motor can be installed on the base 100 to make the powder in the cavity on the plate body 210 easier to fill the cavity due to vibration. The automatic feeding hopper and the vibration motor are both existing technologies and will not be repeated here.

[0053] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0054] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A powder metallurgy forming device for automobile gears, characterized in that: include: A base (100) having a hydraulic cylinder (110) fixedly connected to the bottom of one end; A mold mechanism (200) is located above the base (100), the mold mechanism (200) comprising a plurality of vertically stacked plates (210), and a mold cavity is formed at the center of the top surface of each of the plurality of plates (210); The supporting mechanism (300) is located below the plurality of the plates (210). The supporting mechanism (300) includes a plurality of bottom boxes (310) sequentially arranged along the long side of the top surface of the base (100), and the plurality of bottom boxes (310) are all located on the top surface of the base (100). The top surface of the base (100) is fixedly connected to a frame (330), and the plurality of bottom boxes (310) are all located inside the frame (330). The frame (330) is provided with a plurality of slide grooves (331) on opposite sides. The frame (330) is fixed to the top surface of the base (100). The plurality of slide grooves (331) on one side correspond to the plurality of bottom boxes (310) one by one, the plurality of bottom boxes (310) are fixedly connected to sliders (311) on opposite sides, the sliders (311) are slidably engaged in the interior of the adjacent slide grooves (331), the top surfaces of the plurality of bottom boxes (310) are provided with sleeve holes, and the interiors of the plurality of sleeve holes are slidably sleeved with shaft rods (320), the interiors of the plurality of bottom boxes (310) are provided with electric push rods, and the movable ends of the plurality of electric push rods are fixedly connected to the bottom ends of the adjacent shaft rods (320); Two guide rods (340) are provided on opposite sides of the frame (330), and a plurality of sleeves (341) are provided on the outer side walls of the two guide rods (340), wherein the inner side walls of the sleeves (341) at one end of the two guide rods (340) are fixedly sleeved with the outer side walls of the adjacent guide rods (340), and a rotating plate (342) is rotatably connected between the two sleeves (341) at the other end of the two guide rods (340), and the bottom surface of the rotating plate (342) is fixedly connected to the movable end of the hydraulic cylinder (110). The sleeve (341) is located on the guide rod (340), and the other sleeves (341) correspond to the multiple bottom boxes (310) one by one. The outer side walls of the other sleeves (341) on any guide rod (340) except the sleeve (341) located at the other end are all rotatably connected to one end of the adjacent slider (311). The inner side walls of the other sleeves (341) on any guide rod (340) except the sleeve (341) located at one end are all slidably sleeved to the outer side walls of the adjacent guide rod (340). The bottom surface of a bottom box (310) located at one end inside the frame (330) is fixedly connected to the top surface of the base (100). A toggle mechanism (400) is located inside the frame (330); A pressing mechanism (500) is located below the toggle mechanism (400); The powder feeding mechanism (600) is located at one end of the frame (330).

2. The powder metallurgy forming device according to claim 1, characterized in that: The toggle mechanism (400) comprises: The movable plate (410) has sliding holes (411) at the four corners of the top surface; Two screw rods (420) are rotatably connected between the two ends of the frame (330); one end of the movable plate (410) is provided with two threaded holes, and the inner side walls of the two threaded holes are respectively screwed with the outer side walls of the two screw rods (420); The four slide rods (430) have outer walls that are slidably sleeved inside the four slide holes (411), and the outer walls of the four slide rods (430) are each provided with two card grooves (431), and the inner walls of the four slide holes (411) are each fixedly connected with two convex strips, and the two convex strips inside any slide hole (411) are slidably clamped inside the two card grooves (431) on the adjacent slide rod (430), and the four corners of the top surface of any plate body (210) are provided with sockets (211), and the four slide rods (430) are respectively slidably plugged into the four sockets (211) on any plate body (210), and the tops of the four slide rods (430) are provided with square plates, and the tops of the four slide rods (430) are each fixedly connected to the bottom surface of the square plates.

3. The powder metallurgy forming device according to claim 2, characterized in that: The pressing mechanism (500) comprises: Two rails (510) are fixedly connected between the two ends of the frame (330); A card plate (520) is slidably engaged between the two card rails (510), and the card plate (520) is located below the movable plate (410); A main cylinder (530) is fixedly connected to the bottom surface of the clamping plate (520); A connecting rod (540) having a top end fixedly connected to the movable end of the main cylinder (530), a collar (541) being slidably sleeved on the outer wall of the connecting rod (540), and two auxiliary cylinders (542) being fixedly connected to the top end of the connecting rod (540), and the movable ends of the two auxiliary cylinders (542) being fixedly connected to the top surface of the collar (541); A pressing die (550) having a center of a top surface fixedly connected to the bottom end of the connecting rod (540), a plurality of notches (551) being provided on an outer side wall of the pressing die (550), and a plurality of connecting frames (552) being fixedly connected to the top surface of the pressing die (550), the plurality of connecting frames (552) corresponding one to one to the plurality of notches (551); A plurality of L-shaped rods (560) are corresponding to the plurality of notches (551) one by one, the short arms of the plurality of L-shaped rods (560) are movably inserted into the interior of adjacent notches (551), and the long arms of the plurality of L-shaped rods (560) are slidably sleeved into the interior of adjacent connection frames (552), one end of the long arms of the plurality of L-shaped rods (560) is rotatably connected to a rotating rod (561), and one end of the plurality of rotating rods (561) is rotatably connected to the outer wall of the collar (541); The screw rod (570) is rotatably connected between the two ends inside the frame (330), one end of the screw rod (570) passes through the other end of the frame (330), and the other end of the frame (330) is fixedly connected to a power box (571), a power motor is provided inside the power box (571), and the motor shaft of the power motor is fixedly connected to one end of the screw rod (570), and a screw-on through hole is opened at one end of the clamping plate (520), and the inner side wall of the screw-on through hole is screwed with the outer side wall of the screw rod (570).

4. The powder metallurgy forming device according to claim 1, characterized in that: The powder feeding mechanism (600) comprises: The shell (610) is a bottom-opening structure, and both ends of the interior of the shell (610) are arc-shaped surfaces. A communication opening (332) is opened at one end of the frame (330), and the shell (610) is located inside the communication opening (332); The bottom surface of the square tube (620) is fixedly connected to the top surface of the shell (610); the top surface of the shell (610) is provided with a plurality of pipe connection openings, and the plurality of pipe connection openings are all connected to the interior of the square tube (620); and the two opposite sides of the square tube (620) are fixedly connected to guide rails (621); The casing (630) is located inside the communication port (332), a plurality of guide wheels (631) are provided at both ends of the inner top surface of the casing (630), and two guide rails (621) are located between the two ends of the inner top surface of the casing (630), a wheel shaft is fixedly sleeved inside any guide wheel (631), and the wheel shaft of any guide wheel (631) is rotatably connected to the inner top surface of the casing (630), and the outer side wall of any guide wheel (631) is slidably engaged with the inside of the adjacent guide rail (621), a motor box (632) is fixedly connected to the top surface of the casing (630), and a servo motor is provided inside the motor box (632), and the motor shaft of the servo motor is fixedly connected to the wheel shaft of the adjacent guide wheel (631); The two third cylinders (640) are both fixedly connected to one end of the frame (330), the opposite sides of the casing (630) are both fixedly connected to support plates, and the movable ends of the two third cylinders (640) are respectively fixedly connected to the bottom surfaces of the two support plates.

5. The powder metallurgy forming device according to claim 1, characterized in that: The tops of opposite sides of any base box (310) are fixedly connected to L-shaped frames, one side of a long arm of any L-shaped frame is fixedly connected to a first cylinder (350), and the movable end of any first cylinder (350) is fixedly connected to a support plate (351).

6. The powder metallurgy forming device according to claim 2, characterized in that: One end of each of the two screw rods (420) passes through the side wall of the adjacent frame (330) and is fixedly sleeved with a pulley, and a transmission belt is rotatably sleeved between the outer side walls of the two pulleys. One end of the frame (330) is fixedly connected to a drive box (421), and a drive motor is provided inside the drive box (421). The motor shaft of the drive motor is fixedly connected to the other end of one of the screw rods (420).

7. The powder metallurgy forming device according to claim 2, characterized in that: The top surface of the movable plate (410) is fixedly connected to a second cylinder (450), and the movable end of the second cylinder (450) is fixedly connected to the center of the bottom surface of the square plate.

8. The powder metallurgy forming device according to claim 3, characterized in that: The outer side walls of the four slide bars (430) are all slidably sleeved with a pressure ring (440), and the inner side walls of the four pressure rings (440) are all fixedly connected with two protruding rods (441), and the two protruding rods (441) inside any pressure ring (440) are slidably engaged with the inside of the two card slots (431) on the adjacent slide bar (430).

9. Gear, characterized in that, The gear is processed and formed by the powder metallurgy forming device according to any one of claims 1 to 8.

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