A powder metallurgy gear shaping device

Abstract

This utility model relates to the field of powder metallurgy technology, specifically a powder metallurgy gear shaping device. It includes an adjusting mechanism located below the annular shell, with a collar rotatably fitted inside the annular shell. In this utility model, the position of adjacent pressure plates is adjusted by activating a hydraulic cylinder, ensuring that one opening of the mold is always closed by the adjacent pressure plate, while the other opening allows the adjacent pressure plate to enter and press the powder inside the mold, shaping the powder into a gear. When the powder is under pressure, a drive motor is activated, using the drive gear and gear ring to rotate the collar, adjusting the mold angle to make the powder flow inside the mold more uniform and optimize the powder flow path, improving powder filling efficiency. After the gear is formed, the hydraulic cylinder can be activated to alternately press the two pressure plates into the mold, thereby applying pressure and shaping to the gear from different directions, thus improving the gear shaping effect.

Description

Technical Field

[0001] This utility model relates to the field of powder metallurgy technology, specifically a powder metallurgy gear shaping device. Background Technology

[0002] Powder metallurgy is a technology that uses metal powder (or a mixture of metal powder and non-metal powder) as raw material to form finished products through shaping and sintering. When using powder to make metal gears, the powder is usually shaped using a mold. By applying pressure to the powder inside the mold, the powder flows along the mold and is then pressed into shape. However, the pressing equipment used in powder metallurgy usually applies pressure to the metal powder inside the mold from above, and the pressure is transmitted from the top of the mold to the bottom. Due to the fluidity of the powder and the design of the mold, the pressure distribution may be uneven, which can easily lead to uneven powder distribution and inconsistent density of the powder at the top and bottom. This is especially true for complex gears with protruding structures in the internal cavity, which can easily affect the state of the gear after sintering.

[0003] Furthermore, after the powder is sintered into gears, the sintered gears need to be placed into the mold at room temperature and pressure is applied to the sintered gears again to perform plastic deformation treatment on the gear surface, correct the dimensional differences and large shrinkage deformation of the gears during the sintering process, thereby improving the dimensional accuracy, surface smoothness and gear density of the gears. Usually, pressing equipment is used in conjunction with the mold. However, since the pressing equipment presses the gears in the mold from above, it is easy to cause uneven shrinkage of the gears, resulting in poor shaping effect and inconvenience. Utility Model Content

[0004] The purpose of this invention is to provide a powder metallurgy gear shaping device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A powder metallurgy gear shaping device, comprising:

[0007] The device comprises an annular shell, an adjustment mechanism for adjusting the angle of the collar, a collar for changing the angle of the mold and cavity block, and a pressing mechanism for pressing material to form and shape. The adjustment mechanism is located below the annular shell. The collar is rotatably sleeved inside the annular shell. Two oppositely arranged connecting frames are fixedly connected to the inner wall of the collar, and a mold is detachably connected between the two connecting frames. A guide rod is provided inside the collar, and a cavity block is fixedly sleeved in the middle of the guide rod. Both ends of the guide rod are detachably connected to the inner wall of the collar. The cavity block is located inside the mold. The pressing mechanism is located inside the collar. The pressing mechanism includes two pressure plates, which are located on opposite sides of the mold. A sleeve hole is opened at the center of one side of each of the two pressure plates, and the inner wall of any sleeve hole is slidably sleeved with the outer wall of the guide rod.

[0008] Furthermore, the outer wall of the guide rod is fixedly connected with multiple protrusions, and the inner wall of any set of holes is provided with multiple grooves, with the protrusions slidingly engaging with the interior of adjacent grooves.

[0009] Furthermore, each pressure plate is equipped with multiple hydraulic cylinders on one side, each hydraulic cylinder is fixedly connected to the inner wall of the collar, and the movable end of each hydraulic cylinder is fixedly connected to one side of the adjacent pressure plate.

[0010] Furthermore, each pressure plate has multiple ejector holes on the other side, and each ejector hole has a ejector rod slidably fitted inside.

[0011] Furthermore, multiple push rods on any pressure plate are arranged around the circumference of adjacent sleeve holes.

[0012] Furthermore, each pressure plate has multiple cylinders fixedly connected to one side via a fixing bracket, each pressure plate has a guide ring, each guide ring is fixedly connected to the movable end of multiple adjacent cylinders, and each guide ring is fixedly connected to multiple adjacent push rods.

[0013] Furthermore, the adjustment mechanism includes:

[0014] The base and the gear ring are provided. The top of the base is fixedly connected to the outer wall of the annular shell. Multiple drive motors are provided inside the base. The motor shaft of any drive motor passes through one side of the base. Multiple drive gears correspond one-to-one with the multiple drive motors. Each drive gear is fixedly sleeved with the motor shaft of the corresponding drive motor. The inner wall of the gear ring is fixedly sleeved with the outer wall of the collar. The teeth of any drive gear mesh with the teeth of the gear ring.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] By activating a hydraulic cylinder, a pressure plate is driven to embed into a mold, allowing powder to be contained in both the pressure plate and the mold. Then, another pressure plate is used to press the powder into the mold, applying pressure to shape the powder into a gear. While the powder is being pressed by the pressure plate, the drive motor can be activated to drive the drive gear and gear ring to rotate the collar, adjusting the mold angle to make the powder flow inside the mold more uniform and optimize the powder flow path, thus improving the powder filling efficiency. After the gear is formed, the position of the adjacent pressure plate can be adjusted by activating the hydraulic cylinder, ensuring that one opening of the mold is always closed by the adjacent pressure plate, while the other opening is used for the adjacent pressure plate to enter and press the powder inside the mold. By using two pressure plates to press into the mold alternately, the gear is pressed and shaped from different directions, thereby improving the shaping effect of the gear. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the annular shell and collar structure in this utility model;

[0019] Figure 3 This is a schematic diagram showing the positional relationship between the mold, guide rod, and pressing mechanism in this utility model;

[0020] Figure 4 This is an exploded view of the structure of the pressure-driven mechanism in this utility model;

[0021] Figure 5 This is a schematic diagram of a gear with a complex internal cavity in this utility model;

[0022] Figure 6 This is a planar schematic diagram of the alternating pressing process of the pressure plate in the pressure mechanism of this utility model.

[0023] In the diagram: 100, annular shell; 200, adjusting mechanism; 210, base; 220, drive gear; 230, gear ring; 300, collar; 310, connecting frame; 320, mold; 330, guide rod; 331, cavity block; 400, pressing mechanism; 410, pressure plate; 420, hydraulic cylinder; 430, ejector rod; 440, cylinder; 441, guide ring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-6 In this embodiment of the utility model, a powder metallurgy gear shaping device includes:

[0026] The annular shell 100, the adjusting mechanism 200 that can adjust the angle of the collar 300, the collar 300 that can drive the mold 320 and the cavity block 331 to change angle, and the pressing mechanism 400 that presses the material to form and shape. The adjusting mechanism 200 is located below the annular shell 100. The collar 300 is rotatably sleeved inside the annular shell 100. Two oppositely arranged connecting frames 310 are fixedly connected to the inner side wall of the collar 300, and the mold 320 is detachably connected between the two connecting frames 310. The part is provided with a guide rod 330, and a cavity block 331 is fixedly sleeved in the middle of the guide rod 330. Both ends of the guide rod 330 are detachably connected to the inner side wall of the collar 300. The cavity block 331 is located inside the mold 320. The pressing mechanism 400 is located inside the collar 300. The pressing mechanism 400 includes two pressure plates 410, and the two pressure plates 410 are located on opposite sides of the mold 320. A sleeve hole is opened in the center of one side of each of the two pressure plates 410. The inner side wall of any sleeve hole is slidably sleeved with the outer side wall of the guide rod 330.

[0027] Specifically, Figure 5 For example, in the case of a gear with a complex internal cavity, the mold 320 is a hollow structure that can be fixed between two connecting brackets 310 via a connector. A guide rod 330 passes through the interior of the mold 320, positioning the cavity block 331 within the mold 320. The guide rod 330 is then fixed to the collar 300 using a component. Each of the two pressure plates 410 has a protrusion on one adjacent side that can be embedded into the mold 320. By moving either pressure plate 410, a protrusion on one pressure plate 410 is embedded into the mold 320, closing one opening of the mold 320. This allows the protrusion on one pressure plate 410, the cavity block 331, and the mold 320 to hold powder. Then, the other pressure plate 410 is embedded into the mold 320. The powder is extruded and shaped into gears. By adjusting the positions of the two pressure plates 410, the two openings of the mold 320 are alternately blocked by the adjacent pressure plates 410, and the unblocked openings of the mold 320 are pressed in by the adjacent pressure plates 410. This allows the gears inside the mold 320 to be subjected to pressure from the adjacent pressure plates 410 on opposite sides. This allows pressure to be applied to the gears formed from the powder from different directions, improving the density and uniformity of the powder. The gears are then removed, sintered, and re-placed into the mold. By adjusting the positions of the two pressure plates 410, the sintered gears are subjected to pressure from the two pressure plates 410 from different directions, thereby improving the shaping effect of the gears.

[0028] Example 1

[0029] like Figure 3-4As shown, in this embodiment, the outer wall of the guide rod 330 is fixedly connected with multiple protrusions, and the inner wall of any sleeve hole is provided with multiple grooves. The protrusions are slidably engaged in the interior of adjacent grooves. Multiple hydraulic cylinders 420 are provided on one side of any pressure plate 410. Each hydraulic cylinder 420 is fixedly connected to the inner wall of the collar 300. The movable end of each hydraulic cylinder 420 is fixedly connected to one side of the adjacent pressure plate 410. Multiple ejection holes are provided on the other side of any pressure plate 410. A push rod 430 is slidably sleeved inside each ejection hole. The multiple push rods 430 on any pressure plate 410 are arranged around the circumference of adjacent sleeve holes.

[0030] In this embodiment, the guide rod 330 makes the pressure plate 410 more stable when sliding along the guide rod 330 through the protrusion and groove. The position of the pressure plate 410 can be adjusted by moving the adjacent pressure plate 410 by activating the hydraulic cylinder 420. The movable end of the hydraulic cylinder 420 is fixed to the pressure plate 410 through the connector. The pressure plate 410 on the hydraulic cylinder 420 can be replaced. When the pressure plate 410 is separated from the mold 320, it can be pushed away by pushing the push rod 430 to abut against the gear inside the mold 320, reducing the adhesion between the gear and the pressure plate 410 when the pressure plate 410 is separated from the gear. The multiple push rods 430 on any pressure plate 410 are arranged around the circumference of the adjacent sleeve hole, so that the force applied to the gear when the push rod 430 abuts against the gear is more uniform.

[0031] like Figure 3-4 As shown, in this embodiment, each pressure plate 410 has multiple cylinders 440 fixedly connected to one side by a fixing frame, each pressure plate 410 has a guide ring 441, each guide ring 441 is fixedly connected to the movable end of the adjacent multiple cylinders 440, and each guide ring 441 is fixedly connected to the adjacent multiple push rods 430.

[0032] In practice, by starting the cylinder 440, the adjacent guide ring 441 can drive the adjacent push rod 430 to move, which makes it easier for the user to use. The other end of the push rod 430 is located at the protrusion of the adjacent pressure plate 410, and the surface shape of the other end of the push rod 430 is consistent with the surface shape of the protrusion of the pressure plate 410.

[0033] Example 2

[0034] Based on Embodiment 1, the adjustment mechanism 200 is provided to facilitate the application of pressure to the gears inside the mold 320.

[0035] like Figure 1-2 As shown, in this embodiment, the adjustment mechanism 200 includes:

[0036] The base 210 and the gear ring 230 are arranged in a manner such that the top of the base 210 is fixedly connected to the outer wall of the annular shell 100, and multiple drive motors are installed inside the base 210. The motor shaft of any drive motor passes through one side of the base 210. Multiple drive gears 220 correspond one-to-one with multiple drive motors, and each drive gear 220 is fixedly sleeved with the motor shaft of the corresponding drive motor. The inner wall of the gear ring 230 is fixedly sleeved with the outer wall of the collar 300, and the teeth of any drive gear 220 mesh with the teeth of the gear ring 230.

[0037] In specific implementation, when the powder is initially compressed and formed into a gear, the drive motor can be started to drive the adjacent drive gear 220 to rotate. This causes the drive motor to drive the collar 300 to rotate inside the annular shell 100 through the drive gear 220 and the gear ring 230. This adjusts the tilt angle of the mold 320, allowing the powder inside the mold 320 to flow under gravity. This adjusts the powder flow path, improves powder filling efficiency and distribution uniformity. Furthermore, when shaping the gear after it has been formed, the angle of the mold 320 can be adjusted so that the pressure plate 410, which applies pressure to the gear, is always at the top, preventing the gear inside the mold 320 from falling out of the mold 320 opening.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A powder metallurgy gear shaping device, characterized in that, include: Ring-shaped shell (100); An adjustment mechanism (200) is located below the annular shell (100); A collar (300) is rotatably fitted inside the annular shell (100). Two opposing connecting frames (310) are fixedly connected to the inner wall of the collar (300), and a mold (320) is detachably connected between the two connecting frames (310). A guide rod (330) is provided inside the collar (300), and a cavity block (331) is fixedly fitted in the middle of the guide rod (330). Both ends of the guide rod (330) are detachably connected to the inner wall of the collar (300). The cavity block (331) is located inside the mold (320). The pressing mechanism (400) is located inside the collar (300). The pressing mechanism (400) includes two pressure plates (410), and the two pressure plates (410) are located on opposite sides of the mold (320). A sleeve hole is opened at the center of one side of each of the two pressure plates (410), and the inner side wall of any sleeve hole is slidably sleeved with the outer side wall of the guide rod (330).

2. The powder metallurgy gear sizing apparatus of claim 1, wherein, Multiple hydraulic cylinders (420) are provided on one side of any pressure plate (410). Each hydraulic cylinder (420) is fixedly connected to the inner wall of the collar (300). The movable end of each hydraulic cylinder (420) is fixedly connected to one side of the adjacent pressure plate (410).

3. The powder metallurgy gear sizing apparatus of claim 1, wherein, Multiple ejection holes are provided on the other side of any pressure plate (410), and a push rod (430) is slidably sleeved inside any ejection hole.

4. The powder metallurgy gear sizing apparatus of claim 3, wherein, Each pressure plate (410) has multiple cylinders (440) fixedly connected to one side by a fixing bracket. Each pressure plate (410) has a guide ring (441) on one side. Each guide ring (441) is fixedly connected to the movable end of multiple adjacent cylinders (440). Each guide ring (441) is fixedly connected to multiple adjacent push rods (430).

5. The powder metallurgy gear sizing device of any of claims 1-4, wherein, The adjustment mechanism (200) includes: The base (210) is fixedly connected to the outer wall of the annular shell (100) at its top. Multiple drive motors are installed inside the base (210), and the motor shaft of any drive motor passes through one side of the base (210). Multiple drive gears (220) correspond one-to-one with multiple drive motors, and each drive gear (220) is fixedly sleeved with the motor shaft of the corresponding drive motor; The inner wall of the toothed ring (230) is fixedly sleeved with the outer wall of the collar (300), and the teeth of any drive gear (220) mesh with the teeth of the toothed ring (230).

6. The powder metallurgy gear sizing device of claim 1, wherein, The outer side wall of the guide rod (330) is fixedly connected with multiple protrusions, and the inner side wall of any set hole is provided with multiple grooves, with the protrusions slidingly engaging with the interior of adjacent grooves.

7. The powder metallurgy gear shaping device according to claim 4, characterized in that, Multiple push rods (430) on any pressure plate (410) are arranged around the circumference of adjacent sleeve holes.

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