Powder metallurgy gear compression molding device

Abstract

The invention discloses a powder metallurgy gear pressing forming device, and belongs to the technical field of metal powder forming, the powder metallurgy gear pressing forming device comprises a supporting mechanism, and a working platform used for forming machining is fixedly installed in the middle of the supporting mechanism; a first supporting frame is further arranged below the working platform, and a pressing forming mold is installed between the working platform and the first supporting frame. A second supporting frame is fixedly connected to one side of the working platform, an automatic filling mechanism is installed between the working platform and the second supporting frame, and a vibration tamping mechanism is further installed on the automatic filling mechanism; and an extrusion forming mechanism is mounted at the top of the supporting mechanism. By designing the automatic filling mechanism and the vibration filling mechanism, filling, vibration filling and material supplementing work of the forming mold can be rapidly completed, so that the situation that a local cavity appears in metal powder is effectively avoided, and the overall machining quality of a formed gear is guaranteed.

Description

Technical Field

[0001] This invention belongs to the field of metal powder forming technology, specifically relating to a powder metallurgy gear pressing and forming device. Background Technology

[0002] A powder metallurgy gear pressing and forming apparatus is a device used to produce powder metallurgy gears. Its working principle is as follows: at room temperature, precisely metered metal powder is loaded into a high-precision mold. High pressure is applied through upper and lower punches, compressing it into a gear blank (called a "pressed blank") of a predetermined shape and density. Finally, it is ejected through the mold. A powder metallurgy forming apparatus for producing gears typically includes the following key components: a powder feeding system: uniformly feeding metal powder into the mold; a mold: the key component determining the shape and size of the gear, usually composed of upper and lower molds, containing the gear outline to shape the powder into a gear shape; and a pressing device: this device compresses the metal powder into the desired shape by applying pressure. Common pressing methods include unidirectional pressing and bidirectional pressing.

[0003] Powder metallurgy gear pressing and forming equipment is a common type of gear processing equipment on the market. It has advantages such as easy mass production and high consistency. Although existing processing and forming equipment can achieve rapid processing and forming of large batches of gears, its structural design also has certain defects. When filling, the feeding system of existing processing equipment usually just pushes the metal powder into the groove of the forming mold, then scrapes it flat, and then presses it into shape. In this feeding method, when the powder enters the forming groove quickly during the pushing and filling process, local cavity structures are easily formed inside the forming groove. This results in insufficient metal powder being filled, which in turn leads to uneven weight and deviations in compaction density in the processed gears, thus affecting the overall qualification rate of the products. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a powder metallurgy gear pressing and forming device.

[0005] The technical solution adopted to solve the above technical problems is: a powder metallurgy gear pressing and forming device, including a support mechanism, wherein a working platform for forming processing is fixedly installed in the middle of the support mechanism;

[0006] A first support frame is also provided below the working platform, and a pressing mold for powder pressing and automatic ejection after gear forming is installed between the working platform and the first support frame.

[0007] A second support frame is fixedly connected to one side of the working platform. An automatic filling mechanism is installed between the working platform and the second support frame. The automatic filling mechanism is used for the supply and automatic filling of metal powder. A vibration compaction mechanism is also installed on the automatic filling mechanism for vibration compaction after the automatic filling mechanism fills the metal powder for the first time, so as to ensure the filling amount of powder.

[0008] The top of the support mechanism is equipped with an extrusion molding mechanism, which works in conjunction with a pressing mold to press and shape the metal powder.

[0009] Furthermore, the support mechanism includes a support base, and support columns are fixedly connected to the top corners of the support base. Support plates are fixedly connected to the tops of the multiple support columns.

[0010] Through the above technical solution, the support mechanism, as the overall support frame of the equipment, undertakes the installation support function of each mechanism.

[0011] Furthermore, the working platform includes a support platform fixed to the middle of multiple support columns. The front and rear ends of the top of the support platform are fixedly connected to limit guide rails. Guide grooves are provided on the outer sides of the two limit guide rails. A material unloading groove is provided on one side of the top of the support platform.

[0012] Through the above technical solution, the working platform is the main working area for pressing and processing. The middle of the support platform has stepped holes for installing the pressing and forming mold. The pressing and forming mold can be fixed in the stepped holes by multiple fixing bolts, thereby achieving the purpose of quick installation. In addition, the front and rear ends of the top of the support platform are designed with limiting guide rails. By setting the limiting guide rails, the powder material in the processing can be limited and prevented from spreading. At the same time, the guide grooves set on the outside can guide and limit the movement of the automatic filling mechanism. The material ejection groove set on one side of the support platform can guide the processed gear to one side, so that it can naturally slide onto the conveyor belt or collection device on one side.

[0013] Furthermore, the pressing mold includes a forming mold base fixed in the middle of the working platform. A gear forming groove is provided at the top center of the forming mold base. An enlarged bottom groove is provided at the bottom of the gear forming groove. A bottom fixing seat is fixedly installed at the bottom of the forming mold base. A positioning post is fixedly connected to the top center of the bottom fixing seat. Multiple through-holes are provided on the bottom fixing seat. An ejector mold base is slidably installed in the gear forming groove. Multiple evenly distributed limiting rods are threaded to the bottom periphery of the ejector mold base. A limiting post is provided at the top of each limiting rod. A lifting cylinder is installed at the bottom of the first support frame. The top of the piston rod of the lifting cylinder is fixedly connected to multiple limiting rods.

[0014] Through the above technical solution, the pressing mold adopts a detachable structure design. It can be customized according to the shape and specifications of the gear to be processed, or different molding molds can be quickly replaced. When the metal powder is filled into the gear forming groove, the metal powder accumulates above the ejector die. At this time, the extrusion molding mechanism will start to work, and in conjunction with the ejector die, the metal powder in the gear forming groove can be pressed into shape. After the gear is pressed into shape, the lifting cylinder starts to work, and its piston rod will drive multiple limit rods to move upward synchronously. Then, the formed gear can be ejected from the gear forming groove through the ejector die. When the gear is pushed away from the processing position by the automatic filling mechanism, the lifting cylinder will automatically reset.

[0015] Furthermore, the positioning post penetrates the bottom groove and the gear-shaped groove, and its top end remains flush with the working surface of the work platform.

[0016] Through the above technical solution, the positioning post located in the middle of the bottom groove and the gear forming groove mainly plays the role of limiting and forming. During the pressing and forming process, metal powder will be located on the periphery of the positioning post. After pressing and forming, the area limited by the positioning post will form the middle mounting hole of the gear.

[0017] Furthermore, the automatic filling mechanism includes a telescopic cylinder fixedly installed on the top of the second support frame. A filling frame is fixedly installed at the end of the piston rod of the telescopic cylinder. The bottom of the filling frame is provided with a filling chamber and a vibration chamber. The top of the filling chamber is provided with an injection hole. A feeding pipe is connected to the top of the injection hole. A fixing plate is fixedly installed at the end of the filling frame away from the telescopic cylinder. A sponge block is installed on the outside of the fixing plate. Limit brackets are fixedly installed at both the front and rear ends of the filling frame.

[0018] Through the above technical solution, the automatic filling mechanism is mainly used for the supply and automatic filling of metal powder. During the processing, the metal powder raw material is introduced into the filling chamber through the feeding pipe. Then, the telescopic cylinder pushes the filling frame to move towards the top of the pressing mold through the piston rod. When the filling chamber moves above the gear forming groove, the metal powder in the filling chamber will automatically fill the gear forming groove, thereby achieving the purpose of automatic filling. As the filling frame continues to move, the vibration chamber will move to the top of the forming mold base. After the vibration filling mechanism completes the vibration filling of the metal powder, the telescopic cylinder will drive the filling... The packing frame retracts and resets, causing it to leave the processing area. During the reset process, the metal powder in the packing cavity replenishes the gear forming groove, ensuring sufficient filling and preventing insufficient packing. Additionally, a fixing plate is located on the side of the packing frame away from the telescopic cylinder, with a sponge block installed on its outer side. By using the fixing plate and sponge block, the formed gear can be pushed towards the ejector chute, preventing damage to the gear during the ejection process. Simultaneously, the sponge block can clean the working surface of the work platform during its movement.

[0019] Furthermore, the bottom of the packing frame is in close contact with the working surface of the working platform, and the sliding limit of the limiting bracket is located within the corresponding guide groove.

[0020] The above technical solution, through close fitting, can avoid a large amount of powder residue on the non-working area of ​​the working platform during the filling process; in addition, the design of the limiting bracket and guide slide can ensure the movement accuracy of the filling frame.

[0021] Furthermore, the vibration compaction mechanism includes a fixed disk located inside the vibration chamber. A central vibration column is provided at the bottom center of the fixed disk, and multiple evenly distributed side vibration columns are provided on the bottom periphery of the fixed disk. A reciprocating assembly penetrating the packing frame is fixedly connected to the top center of the fixed disk. A limit hole is provided on the reciprocating assembly. A drive motor is installed at the top rear end of the packing frame. A disk is fixedly connected to the output end of the drive motor. A fixing rod penetrating the limit hole is fixedly connected to the eccentric position of the front end of the disk. A protective cover for protection is installed on the outside of the drive motor.

[0022] Through the above technical solution, the vibration filling mechanism is mainly used for vibration filling after the initial filling of metal powder, so as to avoid the formation of local cavity structure in the gear forming groove by the rapidly pushed metal powder. Specifically, when the vibration chamber moves to the top of the forming mold base, the drive motor will drive the disc to rotate synchronously through the output shaft, which will drive the fixed rod on the disc to move in a circular motion. Since the fixed rod passes through the limiting hole on the reciprocating component, the fixed rod will drive the reciprocating component to move in the vertical direction during high-speed rotation, which can synchronously drive the fixed disc, the central vibration column and multiple side vibration columns to vibrate at high frequency. The high-frequency movement of the central vibration column and multiple side vibration columns can be used to drive the high-frequency impact on the top periphery of the forming mold base and the top of the positioning column, so that the forming mold base itself generates synchronous vibration, thereby quickly filling the metal powder in the gear forming groove, thus effectively avoiding the formation of local cavity.

[0023] Furthermore, the packing frame has a rectangular through hole, through which the bottom end of the reciprocating assembly passes and is fixed to the disc.

[0024] Through the above technical solution, the rectangular through hole can limit the vertical reciprocating motion of the reciprocating component.

[0025] Furthermore, the extrusion molding mechanism includes a hydraulic cylinder fixedly installed at the center of the top of the support plate, with a mounting base fixedly connected to the bottom end of the piston rod of the hydraulic cylinder, and a forming extrusion die head fixedly installed at the bottom of the mounting base.

[0026] With the above technical solution, after the metal powder is filled, the hydraulic cylinder will drive the bottom forming extrusion die head to move down through the mounting seat and extend into the gear forming groove, thereby pressing the metal powder into a gear shape through extrusion molding. After pressing, the hydraulic cylinder will drive it to quickly reset.

[0027] The beneficial effects of the present invention are as follows: (1) By designing an automatic filling mechanism and a vibration filling mechanism, the present invention can quickly complete the filling, vibration filling and material replenishment of the forming mold, thereby effectively avoiding the occurrence of local cavities inside the metal powder and ensuring the overall processing quality of the gear after forming; (2) By designing a vibration filling mechanism, the motor can synchronously drive the fixed plate, the central vibration column and multiple side vibration columns to perform high-frequency vibration, thereby using the high-frequency movement of the central vibration column and multiple side vibration columns to drive the high-frequency impact on the top periphery of the forming mold base and the top of the positioning column, so that the forming mold base itself generates synchronous vibration, thereby quickly filling the metal powder in the gear forming groove, thereby effectively avoiding the occurrence of local cavities; (3) By designing a detachable pressing forming mold, the present invention can be customized according to the shape and specifications of the gear to be processed, thereby quickly changing different forming molds to process gears of different specifications, thereby achieving the purpose of multi-purpose machine. Attached Figure Description

[0028] Figure 1 This is a first-view structural diagram of the present invention;

[0029] Figure 2 This is a second-view structural diagram of the present invention;

[0030] Figure 3 This is the front view of the present invention;

[0031] Figure 4 This is a first-view structural schematic diagram of the pressing mold of the present invention;

[0032] Figure 5 This is a second-view structural schematic diagram of the pressing mold of the present invention;

[0033] Figure 6 This is a front view of the pressing mold of the present invention;

[0034] Figure 7 yes Figure 6 Sectional view along line AA;

[0035] Figure 8 This is a schematic diagram of the ejector mold base of the present invention;

[0036] Figure 9 This is a first-view structural schematic diagram of the automatic filling mechanism of the present invention;

[0037] Figure 10 This is a second-view structural schematic diagram of the automatic filling mechanism of the present invention;

[0038] Figure 11 This is a right view of the automatic filling mechanism of the present invention;

[0039] Figure 12yes Figure 11 Sectional view along the BB direction;

[0040] Figure 13 This is a schematic diagram of the structure of the vibration compaction mechanism of the present invention.

[0041] Reference numerals: 1. Support mechanism; 101. Support base; 102. Support column; 103. Support top plate; 2. Working platform; 201. Support table; 202. Limiting guide rail; 203. Guide groove; 204. Unloading groove; 3. First support frame; 4. Pressing and forming mold; 401. Forming mold base; 402. Gear forming groove; 403. Bottom groove; 404. Bottom fixing seat; 405. Positioning column; 406. Limiting through hole; 407. Ejection mold base; 408. Limiting rod; 409. Limiting column; 410. Lifting cylinder; 5. Second support frame; 6. Automatic filling 601. Material feeding mechanism; 602. Telescopic cylinder; 603. Packing frame; 604. Packing cavity; 605. Vibration chamber; 606. Injection hole; 607. Feeding pipe; 608. Fixing plate; 609. Sponge block; 600. Limiting bracket; 7. Vibration compaction mechanism; 701. Fixing plate; 702. Central vibrating column; 703. Side vibrating column; 704. Reciprocating assembly; 705. Limiting hole; 706. Drive motor; 707. Disc; 708. Fixing rod; 709. Protective cover; 8. Extrusion molding mechanism; 801. Hydraulic cylinder; 802. Mounting base; 803. Forming extrusion die head. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0043] like Figures 1-13 As shown, a powder metallurgy gear pressing and forming device of this embodiment includes a support mechanism 1. The support mechanism 1 includes a support base 101. Support columns 102 are fixedly connected to the top corners of the support base 101. Support plates 103 are fixedly connected to the tops of multiple support columns 102. The support mechanism 1 serves as the overall support frame of the equipment and undertakes the installation support function of each mechanism.

[0044] Regarding work platform 2, please refer to... Figures 1-2A working platform 2 for forming processing is fixedly installed in the middle of the support mechanism 1. The working platform 2 includes a support table 201 fixed in the middle of multiple support columns 102. The front and rear ends of the top of the support table 201 are fixedly connected to limit guide rails 202. Guide grooves 203 are opened on the outer side of the two limit guide rails 202. A material ejection groove 204 for unloading is opened on one side of the top of the support table 201. The working platform 2 is the main working area for pressing processing. A stepped hole for installing the pressing mold 4 is opened in the middle of the support table 201. The pressing mold 4 can... The support platform 201 is fixed in the stepped holes by multiple fixing bolts, which can achieve the purpose of quick installation. In addition, the front and rear ends of the top of the support platform 201 are designed with limiting guide rails 202. By setting the limiting guide rails 202, the powder material in the processing process can be limited and prevented from spreading. At the same time, the guide groove 203 set on its outer side can guide and limit the movement of the automatic filling mechanism 6. The material discharge groove 204 set on one side of the support platform 201 can guide the processed gear to one side, so that it can slide naturally onto the conveyor belt or collection device on one side.

[0045] Regarding compression molding die 4, please refer to... Figures 4-8Below the working platform 2, a first support frame 3 is also provided. Between the working platform 2 and the first support frame 3, a pressing mold 4 for powder pressing and automatic ejection after gear forming is installed. The pressing mold 4 includes a forming mold base 401 fixed in the middle of the working platform 2. A gear forming groove 402 is opened at the top center of the forming mold base 401. An enlarged bottom groove 403 is provided at the bottom of the gear forming groove 402. A bottom fixing seat 404 is fixedly installed at the bottom of the forming mold base 401. A positioning post 405 is fixedly connected to the top center of the bottom fixing seat 404. A plurality of through-holes 406 are opened on the bottom fixing seat 404. An ejection mold base 407 is slidably installed in the gear forming groove 402. A plurality of evenly distributed limiting rods 408 are threadedly connected to the bottom periphery of the ejection mold base 407. A limiting post 409 is provided at the top of each limiting rod 408. A lifting cylinder 410 is installed at the bottom of the support frame 3. The top of the piston rod of the lifting cylinder 410 is fixedly connected to multiple limit rods 408. The pressing mold 4 adopts a detachable structure design. It can be customized according to the shape and specifications of the gear to be processed, or different forming molds can be quickly replaced. When the metal powder is filled into the gear forming groove 402, the metal powder accumulates above the ejector mold base 407. At this time, the extrusion forming mechanism 8 will start to work. In conjunction with the ejector mold base 407, the metal powder in the gear forming groove 402 can be pressed into shape. After the gear is pressed into shape, the lifting cylinder 410 starts to work. Its piston rod will drive multiple limit rods 408 to move upward synchronously. Then, the formed gear can be ejected from the gear forming groove 402 through the ejector mold base 407. When the gear is pushed away from the processing position by the automatic filling mechanism 6, the lifting cylinder 410 will automatically reset.

[0046] In this embodiment, the positioning post 405 penetrates the bottom groove 403 and the gear forming groove 402, and its top end is flush with the working surface of the working platform 2. The positioning post 405 located in the middle of the bottom groove 403 and the gear forming groove 402 mainly plays the role of limiting and forming. During the pressing and forming process, metal powder will be located on the periphery of the positioning post 405. After pressing and forming, the area limited by the positioning post 405 will form the middle mounting hole of the gear.

[0047] Regarding the automatic filling mechanism 6, please refer to... Figures 1-3 as well as Figures 9-12A second support frame 5 is fixedly connected to one side of the working platform 2. An automatic filling mechanism 6 is installed between the working platform 2 and the second support frame 5. The automatic filling mechanism 6 includes a telescopic cylinder 601 fixedly installed on the top of the second support frame 5. A filling frame 602 is fixedly installed at the end of the piston rod of the telescopic cylinder 601. The bottom of the filling frame 602 is provided with a filling chamber 603 and a vibration chamber 604. The top of the filling chamber 603 is provided with an injection hole 605. A feeding pipe 606 is connected to the top of the injection hole 605. The filling frame 602 is located away from the telescopic cylinder 5. A fixing plate 607 is fixedly installed at one end of cylinder 601, and a sponge block 608 is installed on the outside of the fixing plate 607. Limit brackets 609 are fixedly installed at both the front and rear ends of the filling frame 602. The automatic filling mechanism 6 is mainly used for the supply of metal powder and automatic filling. During the processing, the metal powder raw material is introduced into the filling cavity 603 through the feeding pipe 606. Then, the telescopic cylinder 601 pushes the filling frame 602 to move towards the top of the pressing mold 4 through the piston rod. When the filling cavity 603 moves above the gear forming groove 402, The metal powder in the filling cavity 603 automatically fills the gear forming groove 402, thus achieving automatic filling. As the filling frame 602 continues to move, the vibration cavity 604 moves directly above the forming mold base 401. After the vibration filling mechanism 7 completes the vibration filling of the metal powder, the telescopic cylinder 601 drives the filling frame 602 to retract and reset, causing the filling frame 602 to leave the processing area. During the reset process, the metal powder in the filling cavity 603 will replenish the gear forming groove 402 again to ensure the gear... Sufficient metal powder is filled into the forming groove 402 to avoid insufficient filling. In addition, a fixing plate 607 is provided on the side of the filling frame 602 away from the telescopic cylinder 601. A sponge block 608 is installed on the outside of the fixing plate 607. By setting the fixing plate 607 and the sponge block 608, the formed gear can be pushed towards the unloading chute 204 by the sponge block 608, avoiding damage to the gear during the pushing process. At the same time, the sponge block 608 can also clean the working surface of the working platform 2 during the movement.

[0048] In this embodiment, the bottom of the packing frame 602 is in close contact with the working surface of the working platform 2, and the sliding limit of the limiting bracket 609 is located in the corresponding guide groove 203. Through close contact, a large amount of powder residue on the non-working area of ​​the working platform 2 during the packing process can be avoided. In addition, the design of the limiting bracket 609 and the guide groove 203 can ensure the movement accuracy of the packing frame 602.

[0049] Regarding vibration compaction mechanism 7, refer to... Figures 9-13The automatic filling mechanism 6 is also equipped with a vibration compaction mechanism 7. The vibration compaction mechanism 7 includes a fixed disk 701 located in the vibration chamber 604. A central vibration column 702 is provided at the bottom center of the fixed disk 701, and multiple evenly distributed side vibration columns 703 are provided on the bottom periphery of the fixed disk 701. A reciprocating assembly 704 penetrating the filling frame 602 is fixedly connected to the top center of the fixed disk 701. A limit hole 705 is provided on the reciprocating assembly 704. A drive motor 706 is installed at the top rear end of the filling frame 602. A disc 707 is fixedly connected to the output end of the drive motor 706. A fixing rod 708 penetrating the limit hole 705 is fixedly connected to the eccentric position of the front end of the disc 707. A protective cover 709 is installed on the outside of the drive motor 706 for protection. The vibration compaction mechanism 7 is mainly used for vibration compaction after the initial filling of metal powder to avoid the formation of local cavities in the gear forming groove 402 by the rapidly pushed metal powder. Specifically, when the vibration chamber 604 moves to directly above the forming mold base 401, the drive motor 706 drives the disc 707 to rotate synchronously through the output shaft. This, in turn, drives the fixed rod 708 on the disc 707 to move in a circular motion. Since the fixed rod 708 passes through the limiting hole 705 on the reciprocating assembly 704, the fixed rod 708 drives the reciprocating assembly 704 to reciprocate in the vertical direction during high-speed rotation. This synchronously drives the fixed disc 701, the central vibration column 702, and multiple side vibration columns 703 to vibrate at high frequency. The high-frequency movement of the central vibration column 702 and multiple side vibration columns 703 can then drive high-frequency impacts on the top periphery of the forming mold base 401 and the top of the positioning column 405, causing the forming mold base 401 to vibrate synchronously. This allows the metal powder in the gear forming groove 402 to be quickly filled, effectively preventing the formation of local cavities.

[0050] In this embodiment, a rectangular through hole is provided on the packing frame 602, and the bottom end of the reciprocating component 704 passes through the rectangular through hole and is fixed to the disk 707. The rectangular through hole can limit the vertical reciprocating motion of the reciprocating component 704.

[0051] Regarding extrusion molding mechanism 8, see reference... Figures 1-3 The top of the support mechanism 1 is equipped with an extrusion molding mechanism 8, which works with the pressing mold 4 to press and form metal powder. The extrusion molding mechanism 8 includes a hydraulic cylinder 801 fixedly installed at the center of the top of the support plate 103. The bottom end of the piston rod of the hydraulic cylinder 801 is fixedly connected to a mounting base 802. The bottom of the mounting base 802 is fixedly installed with a forming extrusion die 803. After the metal powder is filled, the hydraulic cylinder 801 will drive the forming extrusion die 803 at the bottom to move down through the mounting base 802 and extend into the gear forming groove 402, thereby pressing the metal powder into a gear shape by extrusion molding. After pressing, the hydraulic cylinder 801 will drive it to quickly reset.

[0052] The working principle of this embodiment is as follows: During operation, the metal powder raw material is introduced into the filling chamber 603 through the feeding pipe 606. Then, the telescopic cylinder 601 pushes the filling frame 602 to move to the top of the pressing mold 4 through the piston rod. When the filling chamber 603 moves to the top of the gear forming groove 402, the metal powder in the filling chamber 603 will automatically fill into the gear forming groove 402, thereby achieving the purpose of automatic filling.

[0053] As the filler frame 602 continues to move, the vibration chamber 604 will move to the top of the forming mold base 401 and stay for 1-2 seconds. At this time, the drive motor 706 will drive the fixed plate 701, the central vibration column 702 and multiple side vibration columns 703 to vibrate at high frequency. The high frequency movement of the central vibration column 702 and multiple side vibration columns 703 can be used to drive high frequency impact on the top periphery of the forming mold base 401 and the top of the positioning column 405, so that the forming mold base 401 itself will vibrate synchronously, thereby quickly filling the metal powder in the gear forming groove 402.

[0054] After the vibration filling mechanism 7 completes the vibration filling of the metal powder, the telescopic cylinder 601 will drive the packing frame 602 to retract and reset, so that the packing frame 602 leaves the processing area. During the reset process, the metal powder in the packing cavity 603 will replenish the gear forming groove 402 again to ensure that the metal powder in the gear forming groove 402 is filled with sufficient amount.

[0055] Subsequently, the hydraulic cylinder 801 will drive the bottom forming extrusion die 803 to move down through the mounting base 802 and extend into the gear forming groove 402, thereby pressing the metal powder into a gear shape through extrusion molding. After pressing is completed, the hydraulic cylinder 801 will drive it to quickly reset.

[0056] After the gear is pressed and formed, the lifting cylinder 410 starts to work. Its piston rod will drive multiple limit rods 408 to move upward synchronously. Then, the formed gear can be ejected from the gear forming groove 402 through the ejector mold base 407. At this time, the automatic filling mechanism 6 continues to work. During this process, the sponge block 608 on the outside of the fixed plate 607 will push the formed gear towards the unloading slide 204, thereby realizing automatic unloading. At the same time, the filling process is also carried out synchronously, and so on.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A powder metallurgy gear pressing and forming device, comprising a support mechanism (1), characterized in that: The support mechanism (1) has a working platform (2) for forming and processing fixedly installed in the middle. A first support frame (3) is also provided below the working platform (2), and a pressing mold (4) for powder pressing molding and automatic ejection after gear molding is installed between the working platform (2) and the first support frame (3). A second support frame (5) is fixedly connected to one side of the working platform (2). An automatic filling mechanism (6) is installed between the working platform (2) and the second support frame (5). The automatic filling mechanism (6) is used for the supply of metal powder and automatic filling. A vibration compaction mechanism (7) is also installed on the automatic filling mechanism (6) for vibration compaction after the automatic filling mechanism (6) fills the metal powder for the first time, so as to ensure the filling amount of powder. The top of the support mechanism (1) is equipped with an extrusion molding mechanism (8), which works in conjunction with the pressing molding die (4) to press and mold the metal powder.

2. The powder metallurgy gear pressing and forming device according to claim 1, characterized in that, The support mechanism (1) includes a support base (101), and support columns (102) are fixedly connected to the top corners of the support base (101). Support plates (103) are fixedly connected to the tops of the multiple support columns (102).

3. The powder metallurgy gear pressing and forming apparatus according to claim 2, characterized in that, The working platform (2) includes a support platform (201) fixed in the middle of multiple support columns (102). The front and rear ends of the top of the support platform (201) are fixedly connected to limit guide rails (202). The outer sides of the two limit guide rails (202) are provided with guide grooves (203). The top side of the support platform (201) is provided with a material discharge groove (204) for unloading.

4. The powder metallurgy gear pressing and forming apparatus according to claim 1, characterized in that, The pressing mold (4) includes a forming mold base (401) fixed in the middle of the working platform (2). A gear forming groove (402) is provided at the top center of the forming mold base (401). An enlarged bottom groove (403) is provided at the bottom of the gear forming groove (402). A bottom fixing seat (404) is fixedly installed at the bottom of the forming mold base (401). A positioning column (405) is fixedly connected to the top center of the bottom fixing seat (404). The bottom fixing seat (404) is positioned to... The upper part has multiple through-holes (406) for limiting. An ejector mold base (407) is slidably installed in the gear forming groove (402). Multiple evenly distributed limiting rods (408) are threaded to the bottom periphery of the ejector mold base (407). Each limiting rod (408) has a limiting post (409) at its top. A lifting cylinder (410) is installed at the bottom of the first support frame (3). The top of the piston rod of the lifting cylinder (410) is fixedly connected to the multiple limiting rods (408).

5. The powder metallurgy gear pressing and forming apparatus according to claim 4, characterized in that, The positioning post (405) passes through the bottom groove (403) and the gear forming groove (402), and its top end is flush with the working surface of the working platform (2).

6. The powder metallurgy gear pressing and forming apparatus according to claim 3, characterized in that, The automatic filling mechanism (6) includes a telescopic cylinder (601) fixedly installed on the top of the second support frame (5). A filling frame (602) is fixedly installed at the end of the piston rod of the telescopic cylinder (601). The bottom of the filling frame (602) is provided with a filling chamber (603) and a vibration chamber (604). The top of the filling chamber (603) is provided with an injection hole (605). The top of the injection hole (605) is connected to a feeding pipe (606). A fixing plate (607) is fixedly installed at the end of the filling frame (602) away from the telescopic cylinder (601). A sponge block (608) is installed on the outside of the fixing plate (607). Limit brackets (609) are fixedly installed at both the front and rear ends of the filling frame (602).

7. The powder metallurgy gear pressing and forming apparatus according to claim 6, characterized in that, The bottom of the packing frame (602) is in close contact with the working surface of the working platform (2), and the sliding limit bracket (609) is located in the corresponding guide groove (203).

8. The powder metallurgy gear pressing and forming apparatus according to claim 6, characterized in that, The vibration compaction mechanism (7) includes a fixed disk (701) located in the vibration chamber (604). A central vibration column (702) is provided at the bottom center of the fixed disk (701). Multiple side vibration columns (703) are evenly distributed on the bottom periphery of the fixed disk (701). A reciprocating assembly (704) that penetrates the packing frame (602) is fixedly connected to the top center of the fixed disk (701). A limiting hole (705) is opened on the reciprocating assembly (704). A drive motor (706) is installed at the top rear end of the packing frame (602). A disc (707) is fixedly connected to the output end of the drive motor (706). A fixing rod (708) that penetrates the limiting hole (705) is fixedly connected to the eccentric position of the front end of the disc (707). A protective cover (709) for protection is installed on the outside of the drive motor (706).

9. The powder metallurgy gear pressing and forming apparatus according to claim 8, characterized in that, The packing frame (602) has a rectangular through hole, and the bottom end of the reciprocating assembly (704) passes through the rectangular through hole and is fixed to the disc (707).

10. The powder metallurgy gear pressing and forming apparatus according to claim 2, characterized in that, The extrusion molding mechanism (8) includes a hydraulic cylinder (801) fixedly installed at the center of the top of the support plate (103). The bottom end of the piston rod of the hydraulic cylinder (801) is fixedly connected to a mounting base (802), and the bottom of the mounting base (802) is fixedly installed with a forming extrusion die (803).

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