Gear manufacturing equipment for powder metallurgy manufacturing

Abstract

The invention relates to the technical field of powder metallurgy equipment, in particular to gear manufacturing equipment for powder metallurgy manufacturing, which comprises a workbench, a discharging mechanism, a main hydraulic rod, an isobaric mechanism, an upper die rod assembly, a female die and a lower die rod assembly, the female die is fixedly mounted on the workbench, a middle-layer cavity is formed in the female die, and a first accommodating cavity is formed in the bottom end of the middle-layer cavity; a second containing cavity is formed in one side of the bottom end of the middle-layer cavity, and the discharging mechanism is installed at one end of the workbench. According to the invention, through the arrangement of the isobaric mechanism, the pressure intensity is the same when the die rod I, the die rod II and the die rod III extrude downwards, in the stamping process, the top end of the die rod V moves to the position flush with the inner bottom surface of the middle-layer cavity, the die rod II moves downwards relative to the die rod I, so that an embedding groove part is formed, and the die rod III moves upwards relative to the die rod I, so that a limiting part is formed in a die hole; and one-time stamping forming of the special-shaped gear of a three-layer structure is further achieved, the production efficiency is improved, and meanwhile the uniformity degree of the density of a gear blank is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of powder metallurgy equipment, and specifically to a gear manufacturing equipment for powder metallurgy manufacturing. Background Art

[0002] When using powder metallurgy to manufacture gears, the manufacturing process is less. Generally, it is powder stamping to form a blank, then heating and forming, and then grinding the gear surface. When manufacturing gears by powder metallurgy, the material utilization rate can reach more than 95%. The repeatability of powder metallurgy gears is very good because powder metallurgy gears are formed by pressing with a mold. Under normal use conditions, a set of molds can press tens of thousands to hundreds of thousands of gear blanks. Powder metallurgy can manufacture several parts integrally. The material density of powder metallurgy gears is controllable. And for the convenience of removing the blank from the mold after forming, the roughness of the working surface of the mold is good. The existing powder metallurgy stamping devices are more suitable for gears with regular or simple structures. However, when stamping gears with multi-layer structures, especially special-shaped gears, in order to make the density uniform, multi-layer stamping is mostly used, and the efficiency is not high. Summary of the Invention

[0003] The purpose of the present invention is to provide a gear manufacturing equipment for powder metallurgy manufacturing to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solutions: A gear manufacturing equipment for powder metallurgy manufacturing, comprising: A workbench; A female mold, fixedly installed on the workbench. A middle layer cavity is provided on the female mold. A cavity one is provided at the bottom end of the middle layer cavity, and a cavity two is provided on one side of the bottom end of the middle layer cavity; A feeding mechanism, installed at one end of the workbench, and the feeding mechanism is used to fill powder into the female mold; An upper mold rod assembly, used to press downward into the female mold, and the upper mold rod assembly is used to shape one side of the gear. The upper mold rod assembly includes a mold rod one, a mold rod two, and a mold rod three; A lower mold rod assembly, used to press upward into the female mold, and the lower mold rod assembly cooperates with the upper mold rod assembly to press the powder in the female mold; A main hydraulic rod, installed on the workbench, and the output end of the main hydraulic rod is used to drive the upper mold rod assembly to move up and down; An equal pressure mechanism, installed between the upper mold rod assembly and the output end of the main hydraulic rod, and the equal pressure mechanism is used to adjust the relative depth positions between the mold rod one, the mold rod two, and the mold rod three.

[0005] Furthermore, the feeding mechanism includes a feeding box which is installed on the workbench. A cylinder is installed below the feeding box on the workbench. The output end of the cylinder is fixedly installed with a stacking frame, and a release pipe is installed at the bottom end of the feeding box.

[0006] Furthermore, the lower die rod assembly includes die rod four and die rod five. Die rod five is slidably inserted into cavity two, and die rod four is slidably inserted into cavity one. The top end of die rod four is fixedly connected with a central rod. A hydraulic rod one is fixedly installed between the bottom end of die rod four and the workbench, and a hydraulic rod two is fixedly installed between the bottom end of die rod five and the workbench.

[0007] Furthermore, a die hole is formed on die rod one. Die rod three is slidably inserted into the die hole, and die rod two is slidably inserted into die rod one. A die seat is fixedly installed at the top end of die rod one, a piston rod one is fixedly installed at the top end of the die seat, a piston rod two is fixedly installed at the top end of die rod two, and a piston rod three is fixedly installed at the top end of die rod three. Piston rod three, piston rod two, and piston rod one are all slidably inserted into the equal-pressure mechanism.

[0008] Furthermore, the equal-pressure mechanism includes a fixing plate and a main cylinder body. A connecting frame is fixedly connected between the top surface of the fixing plate and the output end of the main hydraulic rod. Sub-cylinders are fixedly installed at the positions corresponding to piston rod one, piston rod two, and piston rod three on the fixing plate. Piston rod one, piston rod two, and piston rod three are respectively slidably inserted into the corresponding sub-cylinders, and the main cylinder body is fixedly installed at the top position of the three sub-cylinders.

[0009] Furthermore, the ratio of the cross-sectional areas of die rod one, die rod two, and die rod three is the same as the ratio of the cross-sectional areas between piston rod one, piston rod two, and piston rod three.

[0010] Furthermore, a circular shaft is rotatably connected to the main cylinder body. Two groups of partitions are fixedly connected inside the main cylinder body. Partition plates are fixedly installed on the circular shaft corresponding to the two groups of partitions. Through holes are formed on the partition plates. A transmission module is fixedly installed at one end of the main cylinder body, and the transmission module is in transmission connection with one end of the circular shaft. The transmission module is used to drive the circular shaft to rotate.

[0011] Furthermore, a horizontal frame is fixedly installed on the stacking frame.

[0012] Furthermore, an air release hole is formed at the top end of die rod two.

[0013] The present invention also provides a gear produced by a gear manufacturing device for powder metallurgy manufacturing, including a gear body. The gear body is in the shape of a sector gear as a whole. A convex tube portion is provided at the axial center position on one side of the gear body, a groove portion is formed at the axial center position on the other side of the gear body, and a limiting portion is provided at the outer edge position on the other side of the gear body.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Through the settings of the upper die rod assembly, the female die, and the lower die rod assembly, the main hydraulic rod drives the upper die rod assembly to move downward through the equal-pressure mechanism. When the upper die rod assembly moves downward, die rod five and die rod four rise simultaneously. Through the setting of the equal-pressure mechanism, the pressures when die rod one, die rod two, and die rod three press downward are the same, so as to realize downward extrusion and contraction of each part of the top surface of the powder with the same pressure, improve the uniformity of each part of the blank during extrusion molding, and improve the overall strength. During the stamping process, the top of die rod five moves to a position flush with the inner bottom surface of the middle cavity, die rod two moves downward relative to die rod one, so as to form a groove portion, and die rod three moves upward relative to die rod one, so as to realize the formation of a limiting portion in the die hole, further realizing the single stamping formation of the special-shaped gear with a three-layer structure, improving the production efficiency, and at the same time improving the uniformity of the density of the gear blank; 2. Through the setting of the equal-pressure mechanism, the air cylinder drives the material stacking frame to move above the female die, and then the main hydraulic rod drives the equal-pressure mechanism and the upper die rod assembly to move downward, so that die rod one, die rod two, and die rod three press downward against the horizontal frame, so that the bottoms of die rod one, die rod two, and die rod three are in a flush state. Subsequently, the transmission module drives the round shaft and the partition plate to rotate to limit the relative positions of die rod one, die rod two, and die rod three. When stamping again, when die rod one drops to the height of the top of the female die, the transmission module drives the round shaft to rotate, so that the three sub-cylinder bodies are restored to communicate with each other, so as to realize the simultaneous contact extrusion of die rod one, die rod two, and die rod three on the powder, thereby reducing the density non-uniformity caused by the lateral movement of the powder during stamping and improving the uniformity of the density of the blank. Description of the Drawings

[0015] Figure 1 is the overall structural schematic diagram of the manufacturing device in the present invention; Figure 2 is the front view structural schematic diagram of the manufacturing device in the present invention; Figure 3 is the structural schematic diagram of the equal-pressure mechanism in the present invention; Figure 4 is the structural schematic diagram of the upper die rod assembly in the present invention; Figure 5 is the internal structural schematic diagram of the main cylinder body in the present invention; Figure 6 is the structural schematic diagram of the female die in the present invention; Figure 7It is a schematic diagram of the blank body located in the female mold in the present invention; Figure 8 It is a schematic diagram of the gear structure in the present invention; Figure 9 It is a schematic diagram of the shape comparison before and after powder stamping in the present invention.

[0016] In the figure: 100, workbench; 110, first hydraulic rod; 120, second hydraulic rod; 200, feeding mechanism; 210, cylinder; 220, feeding box; 221, release pipe; 230, stacking frame; 231, horizontal frame; 300, main hydraulic rod; 400, equal-pressure mechanism; 410, connecting frame; 420, fixed plate; 430, sub-cylinder body; 440, main cylinder body; 441, partition; 450, round shaft; 451, partition plate; 452, through hole; 460, transmission module; 500, upper die rod assembly; 510, die base; 511, first piston rod; 520, first die rod; 521, die hole; 530, second die rod; 531, second piston rod; 540, third die rod; 541, third piston rod; 600, female mold; 610, middle cavity; 620, first cavity; 630, second cavity; 700, lower die rod assembly; 710, fourth die rod; 711, center rod; 720, fifth die rod; 800, gear body; 810, convex tube part; 820, embedding groove part; 830, limiting part. Detailed implementation manners

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Please refer to Figures 1 to 8, in the embodiment of the present invention, a gear manufacturing device for powder metallurgy manufacturing includes a workbench 100, a feeding mechanism 200, a main hydraulic rod 300, an equal-pressure mechanism 400, an upper die rod assembly 500, a female die 600, and a lower die rod assembly 700. The female die 600 is fixedly installed on the workbench 100. A middle layer cavity 610 is formed on the female die 600. A first accommodating cavity 620 is formed at the bottom end of the middle layer cavity 610, and a second accommodating cavity 630 is formed on one side of the bottom end of the middle layer cavity 610. The feeding mechanism 200 is installed at one end of the workbench 100 and is used for filling powder into the female die 600. The upper die rod assembly 500 is used for stamping downward into the female die 600 and is used for shaping one side of the gear. The upper die rod assembly 500 includes a first die rod 520, a second die rod 530, and a third die rod 540. The lower die rod assembly 700 is used for stamping upward into the female die 600. The lower die rod assembly 700 and the upper die rod assembly 500 cooperate to stamp the powder in the female die 600. The main hydraulic rod 300 is installed on the workbench 100, and the output end of the main hydraulic rod 300 is used to drive the upper die rod assembly 500 to move up and down. The equal-pressure mechanism 400 is installed between the upper die rod assembly 500 and the output end of the main hydraulic rod 300 and is used to adjust the relative depth positions among the first die rod 520, the second die rod 530, and the third die rod 540. The lower die rod assembly 700 includes a fourth die rod 710 and a fifth die rod 720. The fifth die rod 720 is slidably inserted into the second accommodating cavity 630, and the fourth die rod 710 is slidably inserted into the first accommodating cavity 620. A central rod 711 is fixedly connected to the top end of the fourth die rod 710, and a first hydraulic rod 110 is fixedly installed between the bottom end of the fourth die rod 710 and the workbench 100. A second hydraulic rod 120 is fixedly installed between the bottom end of the fifth die rod 720 and the workbench 100.

[0019] The present invention also provides a gear produced by a gear manufacturing device for powder metallurgy manufacturing, which includes a gear main body 800. The gear main body 800 is in the shape of a sector gear as a whole. A convex tube portion 810 is provided at the axial center position on one side of the gear main body 800, a socket portion 820 is formed at the axial center position on the other side of the gear main body 800, and a limiting portion 830 is provided at the outer edge position on the other side of the gear main body 800.

[0020] Specifically, through the settings of the second cavity 630 and the fifth die rod 720, the volume of the powder contained in the second cavity 630 is the same as the required powder volume formed by the limiting portion 830. Initially, the top end of the central rod 711 is flush with the top end of the female die 600. After the feeding mechanism 200 fills the female die 600 with powder, the powder in the female die 600 is leveled. Subsequently, the main hydraulic rod 300 drives the upper die rod assembly 500 to move downward through the equal-pressure mechanism 400. When the bottom end of the first die rod 520 moves downward to the plane position of the top end of the female die 600, the bottom ends of the first die rod 520, the second die rod 530, and the third die rod 540 are in the same plane, that is, the bottom ends of the first die rod 520, the second die rod 530, and the third die rod 540 are in contact with the powder simultaneously. Subsequently, when the upper die rod assembly 500 moves downward, the fifth die rod 720 and the fourth die rod 710 rise simultaneously. Through the setting of the equal-pressure mechanism 400, the pressures when the first die rod 520, the second die rod 530, and the third die rod 540 press downward are the same, so as to realize squeezing and shrinking the top surface of the powder at the same pressure everywhere, improve the uniformity of each part of the green body during extrusion forming, and improve the overall strength. After stamping is completed, the upper die rod assembly 500 moves upward and disengages, the fourth die rod 710 moves upward to eject the green body, and the green body is unloaded by an external manipulator. Subsequently, the fourth die rod 710 and the fifth die rod 720 are reset. During the entire stamping process, the top end of the fifth die rod 720 moves to a position flush with the inner bottom surface of the middle cavity 610, the second die rod 530 moves downward relative to the first die rod 520, thereby forming the groove portion 820, and the third die rod 540 moves upward relative to the first die rod 520, thereby realizing the formation of the limiting portion 830 in the die hole 521, further realizing the single stamping formation of the three-layer structured bevel gear, improving the production efficiency, and at the same time improving the uniformity of the density of the gear blank.

[0021] Embodiment 1

[0022] Such as Figures 1 to 5As shown, in this embodiment, the feeding mechanism 200 includes a feeding box 220. The feeding box 220 is installed on the workbench 100. A cylinder 210 is installed below the feeding box 220 on the workbench 100. A stacking frame 230 is fixedly installed at the output end of the cylinder 210. A release pipe 221 is installed at the bottom end of the feeding box 220. A die hole 521 is formed in the first die rod 520. The third die rod 540 is slidably inserted into the die hole 521. The second die rod 530 is slidably inserted into the first die rod 520. A die seat 510 is fixedly installed at the top end of the first die rod 520. A first piston rod 511 is fixedly installed at the top end of the die seat 510. A second piston rod 531 is fixedly installed at the top end of the second die rod 530. A third piston rod 541 is fixedly installed at the top end of the third die rod 540. The third piston rod 541, the second piston rod 531, and the first piston rod 511 are all slidably inserted into the equal-pressure mechanism 400. The equal-pressure mechanism 400 includes a fixing plate 420 and a main cylinder block 440. A connecting frame 410 is fixedly connected between the top surface of the fixing plate 420 and the output end of the main hydraulic rod 300. Sub-cylinder blocks 430 are fixedly installed at positions corresponding to the first piston rod 511, the second piston rod 531, and the third piston rod 541 on the fixing plate 420. The first piston rod 511, the second piston rod 531, and the third piston rod 541 are respectively slidably inserted into the corresponding sub-cylinder blocks 430. The main cylinder block 440 is fixedly installed at the top position of the three sub-cylinder blocks 430. The ratio of the cross-sectional areas of the first die rod 520, the second die rod 530, and the third die rod 540 is the same as the ratio of the cross-sectional areas between the first piston rod 511, the second piston rod 531, and the third piston rod 541.

[0023] In this embodiment, the main cylinder block 440 is filled with hydraulic oil. When the first die rod 520, the second die rod 530, and the third die rod 540 press the powder downward, the three sub-cylinder blocks 430 are in a communicating state. Considering the ratio of the cross-sectional areas of the first die rod 520, the second die rod 530, and the third die rod 540 and the ratio of the cross-sectional areas between the first piston rod 511, the second piston rod 531, and the third piston rod 541, when the pressures exerted downward by the first piston rod 511, the second piston rod 531, and the third piston rod 541 are the same, the pressures exerted downward by the first die rod 520, the second die rod 530, and the third die rod 540 on the powder are also the same. (The fact that the pressures exerted downward by the first die rod 520, the second die rod 530, and the third die rod 540 are the same does not mean that the bottoms of the first die rod 520, the second die rod 530, and the third die rod 540 are always at the same level. Since the thicknesses of the powder at various places in the female die 600 are different, for example, the thickness of the powder between the fifth die rod 720 and the third die rod 540 is greater than the thickness of the powder directly below the first die rod 520. Under the condition of the same downward pressing pressure, the compression ratios of the powder at various places in the female die 600 are the same. Considering the upward movement of the fifth die rod 720, when the first die rod 520 moves downward, the third die rod 540 moves upward relative to the first die rod 520. Similarly, the second die rod 530 moves downward relative to the first die rod 520, forming the groove part 820). The weight differences of the first die rod 520, the second die rod 530, and the third die rod 540 are negligible compared to the downward pressure during stamping (generally several hundred Mpa).

[0024] Embodiment Two

[0025] On the basis of Embodiment One, in order to make up for the problem in Embodiment One that when the equal-pressure mechanism 400 is in the initial position, due to the different self-weights of the first die rod 520, the second die rod 530, and the third die rod 540, the first die rod 520, the second die rod 530, and the third die rod 540 may slide under their own weights, resulting in the bottoms of the first die rod 520, the second die rod 530, and the third die rod 540 not being in the same plane during the next stamping, and the first die rod 520, the second die rod 530, and the third die rod 540 not contacting the powder simultaneously, so as to enhance the effect of downward stamping.

[0026] As Figures 4 to 9 shown, in this embodiment, a circular shaft 450 is rotatably connected to the main cylinder block 440. Two groups of partitions 441 are fixedly connected inside the main cylinder block 440. Corresponding to the two groups of partitions 441 on the circular shaft 450, partition plates 451 are fixedly installed. Through holes 452 are formed in the partition plates 451. A transmission module 460 is fixedly installed at one end of the main cylinder block 440. The transmission module 460 is in transmission connection with one end of the circular shaft 450. The transmission module 460 is used to drive the circular shaft 450 to rotate. A horizontal frame 231 is fixedly installed on the stacking frame 230. An air vent is formed at the top end of the second die rod 530.

[0027] During specific implementation, after stamping is completed, when the upper die rod assembly 500 moves upward and disengages, the bottom ends of the first die rod 520, the second die rod 530, and the third die rod 540 are in a staggered state. The material feeding box 220 adds powder into the stacking frame 230. After the blank is unloaded, the air cylinder 210 drives the stacking frame 230 to move above the female die 600. Subsequently, the main hydraulic rod 300 drives the equalizing mechanism 400 and the upper die rod assembly 500 to move downward, so that the first die rod 520, the second die rod 530, and the third die rod 540 move downward and abut against the horizontal frame 231, thereby making the bottom ends of the first die rod 520, the second die rod 530, and the third die rod 540 in a flush state. Subsequently, the transmission module 460 drives the circular shaft 450 and the partition plate 451 to rotate, so that the through hole 452 is blocked by the partition 441, thereby disconnecting the communication between the three sub-cylinder bodies 430, and thus limiting the relative positions of the first die rod 520, the second die rod 530, and the third die rod 540. When stamping again, when the first die rod 520 descends to the height of the top end of the female die 600, the transmission module 460 drives the circular shaft 450 to rotate, so that the communication between the three sub-cylinder bodies 430 is restored, thereby realizing the simultaneous contact extrusion of the powder by the first die rod 520, the second die rod 530, and the third die rod 540, thereby reducing the density non-uniformity caused by the lateral movement of the powder during stamping and improving the uniformity of the blank density.

[0028] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed claims.

[0029] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard 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 gear manufacturing device for powder metallurgy manufacturing, characterized in that, Including: Workbench (100); Master mold (600), fixedly installed on the workbench (100), a middle cavity (610) is provided on the master mold (600), a first cavity (620) is provided at the bottom end of the middle cavity (610), and a second cavity (630) is provided on one side of the bottom end of the middle cavity (610); Feeding mechanism (200), installed at one end of the workbench (100), the feeding mechanism (200) is used to fill powder into the master mold (600); Upper die rod assembly (500), used to punch downward into the master mold (600), the upper die rod assembly (500) is used to shape one side of the gear, and the upper die rod assembly (500) includes a first die rod (520), a second die rod (530) and a third die rod (540); Lower die rod assembly (700), used to punch upward into the master mold (600), the lower die rod assembly (700) and the upper die rod assembly (500) cooperate to punch the powder in the master mold (600); Main hydraulic rod (300), installed on the workbench (100), the output end of the main hydraulic rod (300) is used to drive the upper die rod assembly (500) to move up and down; Equal pressure mechanism (400), installed between the upper die rod assembly (500) and the output end of the main hydraulic rod (300), the equal pressure mechanism (400) is used to adjust the relative depth positions among the first die rod (520), the second die rod (530) and the third die rod (540).

2. The gear manufacturing equipment for powder metallurgy manufacturing according to claim 1, characterized in that, The feeding mechanism (200) includes a feeding box (220), the feeding box (220) is installed on the workbench (100), a cylinder (210) is installed on the workbench (100) below the feeding box (220), the output end of the cylinder (210) is fixedly installed with a stacking frame (230), and a release pipe (221) is installed at the bottom end of the feeding box (220).

3. A gear manufacturing device for powder metallurgy manufacturing according to claim 2, characterized in that, The lower die rod assembly (700) includes a fourth die rod (710) and a fifth die rod (720), the fifth die rod (720) is slidably inserted into the second cavity (630), the fourth die rod (710) is slidably inserted into the first cavity (620), the top end of the fourth die rod (710) is fixedly connected with a central rod (711), and a first hydraulic rod (110) is fixedly installed between the bottom end of the fourth die rod (710) and the workbench (100), and a second hydraulic rod (120) is fixedly installed between the bottom end of the fifth die rod (720) and the workbench (100).

4. A gear manufacturing device for powder metallurgy manufacturing according to claim 2, characterized in that, A die rod 1 (520) is provided with a die hole (521). A die rod 3 (540) is slidably inserted into the die hole (521). A die rod 2 (530) is slidably inserted into the die rod 1 (520). A die base (510) is fixedly installed at the top end of the die rod 1 (520). A piston rod 1 (511) is fixedly installed at the top end of the die base (510). A piston rod 2 (531) is fixedly installed at the top end of the die rod 2 (530). A piston rod 3 (541) is fixedly installed at the top end of the die rod 3 (540). The piston rod 3 (541), the piston rod 2 (531), and the piston rod 1 (511) are all slidably inserted into an equal-pressure mechanism (400).

5. A gear manufacturing device for powder metallurgy manufacturing according to claim 4, characterized in that, The equal-pressure mechanism (400) includes a fixed plate (420) and a main cylinder block (440). A connecting frame (410) is fixedly connected between the top surface of the fixed plate (420) and the output end of the main hydraulic rod (300). At positions corresponding to the piston rod 1 (511), the piston rod 2 (531), and the piston rod 3 (541) on the fixed plate (420), sub-cylinder blocks (430) are fixedly installed. The piston rod 1 (511), the piston rod 2 (531), and the piston rod 3 (541) are respectively slidably inserted into the sub-cylinder blocks (430) at corresponding positions. The main cylinder block (440) is fixedly installed at the top end positions of the three sub-cylinder blocks (430).

6. The gear manufacturing equipment for powder metallurgy manufacturing according to claim 5, characterized in that, The ratio of the cross-sectional areas of the die rod 1 (520), the die rod 2 (530), and the die rod 3 (540) is the same as the ratio of the cross-sectional areas of the piston rod 1 (511), the piston rod 2 (531), and the piston rod 3 (541).

7. A gear manufacturing device for powder metallurgy manufacturing according to claim 5, characterized in that, A round shaft (450) is rotatably connected to the main cylinder block (440). Two groups of partitions (441) in a group of two are fixedly connected inside the main cylinder block (440). Corresponding to the two groups of partitions (441) on the round shaft (450), partition plates (451) are fixedly installed. Through holes (452) are provided on the partition plates (451). A transmission module (460) is fixedly installed at one end of the main cylinder block (440). The transmission module (460) is in transmission connection with one end of the round shaft (450). The transmission module (460) is used to drive the round shaft (450) to rotate.

8. A gear manufacturing device for powder metallurgy manufacturing according to claim 7, characterized in that, A horizontal frame (231) is fixedly installed on the stacking frame (230).

9. A gear manufacturing device for powder metallurgy manufacturing according to claim 1, characterized in that, An air vent is provided at the top end of the die rod 2 (530).

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