Powder metallurgy bearing shaping die

Abstract

The utility model discloses a powder metallurgy bearing shaping die, and particularly relates to the technical field of powder metallurgy, which comprises a workbench, a support frame is fixedly arranged on one side of the workbench, a first electric telescopic rod is fixedly arranged at the bottom of the support frame, and a movable plate is fixedly arranged at the output end of the first electric telescopic rod. And a replacing mechanism is arranged at the top of the workbench and comprises two mounting grooves formed in the surface of the workbench, mounting strips are slidably connected to the interiors of the two mounting grooves, an operation frame is fixedly arranged at the tops of the mounting strips, and a plurality of clamping grooves are formed in the surface of the workbench. According to the utility model, different specifications of dies can be replaced conveniently, the production flexibility and efficiency are improved, the damage or abrasion condition of specific die parts can be handled in time in a flexible single die replacement mode, the whole die assembly does not need to be disassembled and assembled on a large scale, and the use effect is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of powder metallurgy, and more specifically, to a powder metallurgy bearing shaping die. Background Art

[0002] With the development of powder metallurgy technology, its advantages of near-net-shape forming and mass production of complex-shaped parts are gradually being valued. Powder metallurgy is a process of making finished or semi-finished products from metal powder through processes such as pressing and sintering. In the manufacture of powder metallurgy bearings, in order to press the loose powder raw materials into bearing blanks with specific shape, size and density requirements, high-precision shaping dies are necessary.

[0003] The existing powder metallurgy ball bearing processing method generally forms a hollow cylindrical workpiece by pressing powder, then sintering it. The sintered workpiece is placed on a lathe for cutting to produce the spherical outer wall. This not only wastes raw materials, but also requires tooling and clamping time when cutting on the lathe, resulting in relatively low production efficiency.

[0004] After searching, the Chinese patent with authorization announcement number CN114951658A discloses a powder metallurgy spherical bearing extrusion molding die. The structure places the workpiece before extrusion on the upper end face of the lower support sleeve through a manipulator, and then pushes the template downward to drive the upper mold core, upper support sleeve and extrusion mandrel to move synchronously downward toward the fixed template. First, the tapered part of the extrusion mandrel is inserted into the middle hole of the workpiece before extrusion to center the workpiece. The telescopic cylinder drives the extrusion mandrel downward, and the extrusion mandrel expands the inner hole of the workpiece and expands it outward. The upper end face of the lower support sleeve moves downward to the junction of the second hemispherical hole and the second middle through hole. The elastic force of the second spring is equal to the downward extrusion force of the workpiece, thereby completing the extrusion molding of the workpiece.

[0005] However, when this structure is actually used, the upper mold core on the movable mold plate and the mold on the surface of the fixed mold plate cannot be replaced. Only powder metallurgy bearings of specific sizes can be produced, which makes it difficult to meet the diverse needs of the market. Moreover, once the mold is damaged and cannot be replaced, the original mold can only be repaired, which makes maintenance difficult. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a powder metallurgy bearing shaping die to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A powder metallurgy bearing shaping die comprises a workbench, a support frame fixedly provided on one side of the workbench, a first electric telescopic rod fixedly provided on the bottom of the support frame, a movable plate fixedly provided on the output end of the first electric telescopic rod, and a replacement mechanism provided on the top of the workbench;

[0009] The replacement mechanism includes two mounting slots provided on the surface of the workbench, the interiors of the two mounting slots are slidably connected to mounting strips, an operating frame is fixedly provided on the top of the mounting strips, a plurality of card slots are provided on the surface of the workbench, a plurality of the card slots are fixedly provided on one side of the mounting slots, a T-shaped card block is inserted into the interior of the card slots, threaded holes are provided on the surfaces of the T-shaped card block and the operating frame, bolts are threadedly connected to the interiors of the threaded holes, a fixing slot is provided on the surface of the operating frame, a lower mold is threadedly connected to the interior of the fixing slot, an upper mold is inserted into the interior of the lower mold, and the upper mold is threadedly connected to the movable plate.

[0010] By adopting the above technical solution, it is convenient to replace molds of different specifications, improve production flexibility and efficiency, and facilitate individual maintenance or replacement, further improving the use effect.

[0011] As a further description of the above technical solution: a second electric telescopic rod is fixedly provided inside the operating frame, a top plate is fixedly provided at the output end of the second electric telescopic rod, a sealing ring is fixedly provided outside the top plate, a through hole is provided on the surface of the lower mold, the top plate is engaged with the through hole, two limit grooves are provided on the surface of the operating frame, two limit blocks are slidably connected to the inside of the two limit grooves, a feeding frame is fixedly provided on one side of the two limit blocks, a feeding mechanism is provided inside the feeding frame, the feeding mechanism includes a sealing strip fixedly provided on the bottom of the feeding frame, and a material equalizing net is fixedly provided on one side of the feeding frame.

[0012] By adopting the above technical solution, smooth demoulding can be effectively achieved, the integrity of the blank is guaranteed and the sealing of the mold is maintained.

[0013] As a further description of the above technical solution: a feed hose is provided on the top of the feed frame, a third electric telescopic rod is fixedly provided on one side of the feed frame, a feed platform is fixedly provided on one side of the third electric telescopic rod, two guide grooves are provided on the surface of the feed platform, the limit block is slidably connected to the guide groove, a fourth electric telescopic rod is fixedly provided on the bottom of the feed platform, a guide rod is fixedly provided between the workbench and the support frame, one end of the guide rod passes through the movable plate and extends to the outside of the movable plate, and a support leg is fixedly provided on the bottom of the workbench.

[0014] By adopting the above technical solution: the feeding position can be flexibly and accurately adjusted, and thus it is suitable for molds of different sizes, which is convenient and efficient. In addition, the guide rod runs through the movable plate to ensure the smooth movement of the movable plate, ensuring the precise matching of the mold, which is conducive to the smooth implementation of the pressing process.

[0015] The technical effects and advantages of this utility model are:

[0016] 1. By providing a replacement mechanism, compared with the existing technology, the lower mold can be removed by unscrewing the bolts, pulling out the T-shaped block upwards, and then pulling out the operating frame along the installation slot. The new operating frame with the appropriate lower mold can then be installed back on the workbench in the reverse order. This simple operation process greatly shortens mold replacement time. Especially when producing a variety of powder metallurgy bearings in small batches, molds can be quickly switched and put into production, improving equipment utilization and production flexibility. In addition, if the upper or lower mold itself is damaged, it can be directly removed and replaced by rotating it. This flexible single mold replacement method can promptly address damage or wear of specific mold components without the need for large-scale disassembly and assembly of the entire mold assembly.

[0017] 2. By setting up a feeding mechanism, compared with the existing technology, the feeding frame is driven to move left and right by the third electric telescopic rod, and the movement trajectory is accurately limited by the cooperation of the limit block, guide groove and limit groove, so that the feeding frame can be accurately moved from the feeding table to the operating frame, thereby realizing accurate control of the feeding position, ensuring that the metal powder can accurately enter the lower mold cavity according to the predetermined path, and can screen and disperse the metal powder entering the lower mold, so that the powder falls into the cavity more evenly. The uniform powder distribution can ensure uniform pressure everywhere during pressing, thereby making the density of the blank uniform and consistent, which helps to improve the quality of powder metallurgy bearings and improve the overall performance and yield rate of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 It is a schematic diagram of the overall working state structure of the utility model.

[0020] Figure 3 It is a schematic diagram of the top cross-sectional structure of the utility model.

[0021] Figure 4 This is a schematic diagram of the replacement mechanism structure of the present utility model.

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of the operating frame of the present utility model.

[0023] Figure 6 This is a schematic structural diagram of the feeding mechanism of the present utility model.

[0024] The accompanying drawings are marked as follows: 1. workbench; 2. support frame; 3. first electric telescopic rod; 4. movable plate; 5. mounting groove; 6. mounting bar; 7. operating frame; 8. T-shaped block; 9. bolt; 10. lower mold; 11. upper mold; 12. second electric telescopic rod; 13. top plate; 14. sealing ring; 15. limit groove; 16. limit block; 17. feed frame; 18. sealing strip; 19. material distribution net; 20. feed hose; 21. third electric telescopic rod; 22. feed table; 23. guide groove; 24. fourth electric telescopic rod; 25. guide rod; 26. support leg. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] The embodiments of this application disclose Figure 1-6 The powder metallurgy bearing shaping die shown includes a workbench 1, a support frame 2 is fixedly provided on one side of the workbench 1, a first electric telescopic rod 3 is fixedly provided on the bottom of the support frame 2, a movable plate 4 is fixedly provided on the output end of the first electric telescopic rod 3, and a replacement mechanism is provided on the top of the workbench 1;

[0027] The replacement mechanism includes two mounting slots 5 provided on the surface of the workbench 1, the interiors of the two mounting slots 5 are slidably connected with mounting strips 6, an operating frame 7 is fixedly provided on the top of the mounting strips 6, a plurality of card slots are provided on the surface of the workbench 1, and the plurality of card slots are fixedly provided on one side of the mounting slot 5, a T-shaped card block 8 is provided inside the card slot, threaded holes are provided on the surfaces of the T-shaped card block 8 and the operating frame 7, the internal threads of the threaded holes are connected with bolts 9, a fixing slot is provided on the surface of the operating frame 7, the internal threads of the fixing slot are connected with a lower mold 10, the interior of the lower mold 10 is plugged with an upper mold 11, and the upper mold 11 is threadedly connected to the movable plate 4. When it is necessary to replace the powder metallurgy bearing mold of different specifications and models, it is only necessary to unscrew the bolts 9 and pull out the T-shaped card block 8 upwards, thereby driving the T The shaped card block 8 is withdrawn from the inside of the card slot, and then the operating frame 7 is pulled out along the installation slot 5, which drives the lower mold 10 to be removed, and then the new operating frame 7 with the appropriate lower mold 10 is installed back on the workbench 1 according to the above installation steps in reverse. At the same time, the lower mold 10 is fixed in the fixing groove opened on the surface of the operating frame 7 by a threaded connection. If the lower mold 10 is damaged, it can be directly rotated and removed. The upper mold 11 and the movable plate 4 are also threadedly connected, which is convenient and quick to operate, and can effectively improve the efficiency of mold replacement when producing products of different specifications.

[0028] Reference Figure 2-4As shown, the interior of the operating frame 7 is fixedly provided with a second electric telescopic rod 12, the output end of the second electric telescopic rod 12 is fixedly provided with a top plate 13, the outside of the top plate 13 is fixedly provided with a sealing ring 14, the surface of the lower mold 10 is provided with a through hole, the top plate 13 is engaged with the through hole, the surface of the operating frame 7 is provided with two limit grooves 15, the interiors of the two limit grooves 15 are slidably connected with two limit blocks 16, one side of the two limit blocks 16 are fixedly provided with a feeding frame 17, the interior of the feeding frame 17 is provided with a feeding mechanism, the feeding mechanism includes a sealing strip 18 fixedly provided at the bottom of the feeding frame 17, and a material equalizing net 19 is fixedly provided on one side of the feeding frame 17. Then, when the first electric telescopic rod 3 is started to push the movable plate 4 downward, the upper mold 11 will move synchronously therewith. At the same time, the guide rod fixed between the workbench 1 and the support frame 2 25, which plays a precise guiding role for the movable plate 4, so that the movable plate 4 can only move smoothly along the vertical direction defined by the guide rod 25, ensuring that the upper mold 11 and the lower mold 10 can accurately match during the pressing process, and realize the pressing of the metal powder placed in the cavity of the lower mold 10. After the powder pressing is completed to form the bearing blank, when the blank needs to be removed from the lower mold 10 and the upper mold 11, the first electric telescopic rod 3 is started to drive the movable plate 4 to move upward, and the upper mold 11 is driven to withdraw from the interior of the lower mold 10, and then the second electric telescopic rod 12 is started to drive the top plate 13 to move upward, and the bearing blank is smoothly pushed out of the lower mold 10 from the through hole through the top plate 13, so as to realize smooth demoulding, and a sealing ring 14 is fixed on the outside of the top plate 13 to fit tightly with the through hole, thereby ensuring the sealing of the lower mold 10 during the pressing process.

[0029] Reference Figure 5-6 As shown, a feeding hose 20 is provided through the top of the feeding frame 17, a third electric telescopic rod 21 is fixedly provided on one side of the feeding frame 17, a feeding platform 22 is fixedly provided on one side of the third electric telescopic rod 21, two guide grooves 23 are provided on the surface of the feeding platform 22, the limit block 16 is slidably connected to the guide groove 23, a fourth electric telescopic rod 24 is fixedly provided on the bottom of the feeding platform 22, a guide rod 25 is fixedly provided between the workbench 1 and the support frame 2, one end of the guide rod 25 passes through the movable plate 4 and extends to the outside of the movable plate 4, and the bottom of the workbench 1 is fixedly provided There are support legs 26. The support legs 26 at the bottom of the workbench 1 ensure that the device can be placed stably in the workplace. A support frame 2 is provided on one side of the workbench 1. The support frame 2 is used to install and carry the first electric telescopic rod 3. This structural layout creates a reasonable space and support structure for the subsequent movable plate 4 to drive the upper mold 11 to move up and down. In addition, the fourth electric telescopic rod 24 at the bottom of the feeding table 22 can adjust the overall vertical height position of the feeding table 22, which is convenient for accurate docking with the operating frame 7, ensuring that the powder enters the mold cavity smoothly and accurately for pressing operation.

[0030] Working principle of this utility model:

[0031] The present invention is a powder metallurgy bearing shaping die. When the device is in use, the support legs 26 at the bottom of the workbench 1 ensure that the device can be stably placed on the work site. A support frame 2 is provided on one side of the workbench 1. The support frame 2 is used to install and carry the first electric telescopic rod 3. This structural layout creates a reasonable space and support structure for the subsequent movable plate 4 to drive the upper mold 11 to move up and down. In addition, the fourth electric telescopic rod 24 at the bottom of the feeding table 22 can adjust the vertical height position of the entire feeding table 22, facilitating accurate docking with the operating frame 7, ensuring that the powder enters the mold cavity smoothly and accurately for the pressing operation;

[0032] Then, the feed hose 20 is connected to the external metal powder conveying pipe, so that the metal powder enters the inside of the feed frame 17 through the feed hose 20, and then the third electric telescopic rod 21 is started to drive the feed frame 17 to move in the left and right directions. The movement of the feed frame 17 drives the limit block 16 to move inside the guide groove 23 and enter the inside of the limit groove 15, further accurately defining the movement trajectory of the feed frame 17, so that the feed frame 17 moves from the feed table 22 to the operating frame 7. At the same time, the sealing strip 18 provided at the bottom of the feed frame 17 plays a role. The sealing effect prevents powder from leaking from the gap at the bottom, ensuring a clean working environment and effective use of raw materials. When the feed frame 17 completely covers the lower mold 10, the metal powder falls into the interior of the lower mold 10 through the material-distributing net 19 fixed on one side of the feed frame 17. After screening and dispersing by the material-distributing net 19, the powder can fall into the cavity of the lower mold 10 more evenly. Then, the third electric telescopic rod 21 is driven to retract, and the above steps are reversed to drive the feed frame 17 back to the feed table 22 to prepare for the next feeding.

[0033] Then, when the first electric telescopic rod 3 is started to push the movable plate 4 downward, the upper mold 11 will move synchronously with it. At the same time, the guide rod 25 fixed between the workbench 1 and the support frame 2 plays a precise guiding role for the movable plate 4, so that the movable plate 4 can only move smoothly along the vertical direction defined by the guide rod 25, ensuring that the upper mold 11 and the lower mold 10 can accurately match during the pressing process, thereby realizing the pressing of the metal powder placed in the cavity of the lower mold 10;

[0034] After the powder is pressed to form the bearing blank, when the blank needs to be ejected from the lower mold 10 and the upper mold 11, the first electric telescopic rod 3 is started to drive the movable plate 4 to move upward, driving the upper mold 11 to withdraw from the inside of the lower mold 10, and then the second electric telescopic rod 12 is started to drive the top plate 13 to move upward, and the bearing blank is smoothly ejected from the lower mold 10 through the through hole through the top plate 13, achieving smooth demoulding. In addition, a sealing ring 14 is fixed on the outside of the top plate 13 to fit tightly with the through hole, ensuring the sealing of the lower mold 10 during the pressing process;

[0035] When it is necessary to replace the powder metallurgy bearing mold of different specifications and models, just unscrew the bolt 9 and pull out the T-shaped block 8 upwards, thereby driving the T-shaped block 8 to withdraw from the inside of the slot, and then pull out the operating frame 7 along the installation slot 5, thereby driving the lower mold 10 to be removed, and then the new operating frame 7 with the appropriate lower mold 10 is installed back on the workbench 1 according to the above installation steps in reverse. At the same time, the lower mold 10 is fixed in the fixing groove opened on the surface of the operating frame 7 by a threaded connection. If the lower mold 10 is damaged, it can be directly rotated and removed. The upper mold 11 is also threadedly connected to the movable plate 4, which is convenient and quick to operate, and can effectively improve the efficiency of mold replacement when producing products of different specifications.

[0036] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A powder metallurgy bearing shaping die, comprising a workbench (1), characterized in that: A support frame (2) is fixedly provided on one side of the workbench (1), a first electric telescopic rod (3) is fixedly provided on the bottom of the support frame (2), a movable plate (4) is fixedly provided on the output end of the first electric telescopic rod (3), and a replacement mechanism is provided on the top of the workbench (1); The replacement mechanism comprises two mounting grooves (5) provided on the surface of the workbench (1), the interiors of the two mounting grooves (5) are slidably connected to mounting bars (6), the tops of the mounting bars (6) are fixedly provided with an operating frame (7), the surface of the workbench (1) is provided with a plurality of card slots, the plurality of card slots are fixedly provided on one side of the mounting grooves (5), the interiors of the card slots are plugged with T-shaped card blocks (8), the surfaces of the T-shaped card blocks (8) and the operating frame (7) are provided with threaded holes, the interiors of the threaded holes are threadedly connected to bolts (9), the surface of the operating frame (7) is provided with a fixing groove, the interior of the fixing groove is threadedly connected to a lower mold (10), the interior of the lower mold (10) is plugged with an upper mold (11), and the upper mold (11) is threadedly connected to the movable plate (4).

2. The powder metallurgy bearing shaping die according to claim 1, characterized in that: A second electric telescopic rod (12) is fixedly provided inside the operating frame (7), a top plate (13) is fixedly provided at the output end of the second electric telescopic rod (12), a sealing ring (14) is fixedly provided outside the top plate (13), a through hole is provided on the surface of the lower mold (10), and the top plate (13) is engaged with the through hole.

3. The powder metallurgy bearing shaping die according to claim 1, characterized in that: Two limiting grooves (15) are provided on the surface of the operation frame (7), and two limiting blocks (16) are slidably connected inside the two limiting grooves (15). A feeding frame (17) is fixedly provided on one side of the two limiting blocks (16), and a feeding mechanism is provided inside the feeding frame (17). The feeding mechanism includes a sealing strip (18) fixedly provided on the bottom of the feeding frame (17), and a material distribution net (19) is fixedly provided on one side of the feeding frame (17).

4. The powder metallurgy bearing shaping die according to claim 3, characterized in that: A feeding hose (20) is provided through the top of the feeding frame (17), a third electric telescopic rod (21) is fixedly provided on one side of the feeding frame (17), and a feeding platform (22) is fixedly provided on one side of the third electric telescopic rod (21).

5. The powder metallurgy bearing shaping die according to claim 1, characterized in that: Two guide grooves (23) are provided on the surface of the feeding platform (22), the limit block (16) is slidably connected to the guide grooves (23), and a fourth electric telescopic rod (24) is fixedly provided at the bottom of the feeding platform (22).

6. The powder metallurgy bearing shaping die according to claim 1, characterized in that: A guide rod (25) is fixedly provided between the workbench (1) and the support frame (2), one end of the guide rod (25) passes through the movable plate (4) and extends to the outside of the movable plate (4), and a support leg (26) is fixedly provided at the bottom of the workbench (1).

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