Powder metallurgy method for bearing preparation and preparation device

Abstract

The invention relates to the field of powder metallurgy for bearing preparation, in particular to a powder metallurgy method for bearing preparation and a preparation device. Comprising an outer mold and an outer frame fixedly connected to the outer mold, a plurality of lead screws I are rotationally connected to the outer frame, a low frame and a high frame are connected to the lead screws I in a threaded mode, the low frame and the high frame are perpendicularly arranged, two pairs of symmetrically-arranged vertical frames are slidably connected to the low frame and the high frame, a movable mold is fixedly connected to each vertical frame, and the multiple movable molds are sequentially coupled. The multiple movable dies are located in the outer die, the outer frame is fixedly connected with multiple inner extending plates, each inner extending plate is fixedly connected with an air cylinder I, air cylinder rods of the multiple air cylinders I are fixedly connected with a stamping plate, and the stamping plate is coupled with the outer die and the multiple movable dies. The diameter of a middle hole of the bearing outer ring is larger than that of diameter holes in the two ends; and a powder metallurgy material can be added uniformly and dispersedly, and a compact bearing outer ring can be stamped.

Description

Technical Field

[0001] The invention relates to the field of powder metallurgy for bearing preparation, and more specifically to a powder metallurgy method and a preparation device for bearing preparation. Background Art

[0002] The inner and outer rings of bearings are generally processed on a lathe. First, the pre-processed material is clamped on the lathe, and the processing parameters, such as processing speed and feed rate, are determined. Then, the material is turned by a turning tool to gradually form it into the shape of the inner and outer rings. However, the steps for processing the outer ring of a bearing on a lathe are complicated, and the turning tool is prone to wear after long-term use, and it requires multiple processes to form. The outer ring of a bearing cannot be formed in one go with a central hole having a diameter larger than the diameter holes at both ends. Summary of the invention

[0003] In order to improve the deficiencies of the prior art, the present invention provides a powder metallurgy method and a preparation device for bearing preparation, which can form a bearing outer ring with a middle hole having a diameter larger than the diameters of the holes at both ends by powder metallurgy at one time.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A bearing preparation device comprises an outer mold and an outer frame fixedly connected to the outer mold, wherein a plurality of screw rods I are rotatably connected to the outer frame, a low frame and a high frame are threadedly connected to the plurality of screw rods I, the low frame and the high frame are vertically arranged, two pairs of symmetrically arranged vertical frames are slidably connected to the low frame and the high frame, a movable mold is fixedly connected to each vertical frame, a plurality of movable molds are coupled in sequence, the plurality of movable molds are located inside the outer mold, a plurality of inner extension plates are fixedly connected to the outer frame, a cylinder I is fixedly connected to each inner extension plate, a stamping plate is fixedly connected to the cylinder rods of the plurality of cylinders I, and the stamping plate is coupled to the outer mold and the plurality of movable molds.

[0006] Furthermore, an arc-shaped protrusion is provided on the outer wall of the middle part of each movable mold.

[0007] Furthermore, the lower frame is rotatably connected with a screw rod II which drives the corresponding two vertical frames to slide synchronously in opposite directions.

[0008] Furthermore, a screw rod III is rotatably connected to the elevated frame and drives the corresponding two upright frames to slide synchronously in opposite directions.

[0009] Furthermore, the threads of the screw rod II and the screw rod III have opposite rotation directions from the middle to both sides of the end.

[0010] Furthermore, a powder metallurgy method for preparing a bearing using the above-mentioned bearing preparation device comprises the following steps:

[0011] Step 1: driving multiple movable molds to couple into a ring shape and couple with the bottom of the outer mold, adding metallurgical powder into the molding cavity between the outer mold and the multiple movable molds;

[0012] Step 2: drive the stamping plate to lift and lower the stamping powder to form the outer ring of the bearing;

[0013] Step 3: Drive multiple moving molds to rise synchronously, and continue to add metallurgical powder until the overall forming of the bearing outer ring is completed;

[0014] Step 4: Drive multiple movable molds to stagger and close up and down, disperse the multiple movable molds, demould the formed bearing outer ring, prepare for material removal and sintering, and the next processing of the bearing outer ring.

[0015] The beneficial effects of the powder metallurgy method and preparation device for bearing preparation of the present invention are: the outer ring of the bearing whose diameter of the middle hole is larger than the diameter of the holes at both ends can be formed by powder metallurgy at one time; the powder metallurgy material can be added evenly and dispersedly to punch out a dense outer ring of the bearing; and the outer ring of the bearing can be demoulded quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0017] Figure 1 It is a structural schematic diagram of a bearing preparation device;

[0018] Figure 2 It is a schematic diagram of the structure of coupling and separation of multiple moving molds;

[0019] Figure 3 It is a structural schematic diagram of the moving mold;

[0020] Figure 4 It is a schematic diagram of the structure of low frame and high frame;

[0021] Figure 5 It is a schematic diagram of the structure of dispersing and adding materials;

[0022] Figure 6 It is a schematic diagram of the structure of stamping powder material molding;

[0023] Figure 7 It is a schematic diagram of the structure of a stamping plate and multiple moving dies.

[0024] In the figure: outer mold 11; outer frame 12; screw rod I 13; low frame 14; screw rod II 15; high frame 16; screw rod III 17; vertical frame 18; movable mold 21; rotating frame 31; gear ring 32; side wheel 33; guide frame 34; cylinder II 35; moving frame 36; material guide frame 37; inner extension plate 41; cylinder I 42; stamping plate 43. DETAILED DESCRIPTION

[0025] refer to Figure 1 , 2 , 3, 4, 6 and 7, detailed description of the embodiments of the powder metallurgy formed bearing outer ring:

[0026] A bearing preparation device comprises an outer mold 11 and an outer frame 12 fixedly connected to the outer mold 11, a plurality of screw rods Ⅰ 13 are rotatably connected to the outer frame 12, each screw rod Ⅰ 13 is fixedly connected to the output shaft of a reduction motor Ⅰ, the reduction motor Ⅰ is fixedly connected to the outer frame 12, the plurality of reduction motors Ⅰ are started, the output shafts of the plurality of reduction motors Ⅰ drive the plurality of screw rods Ⅰ 13 to rotate, the plurality of screw rods Ⅰ 13 are threadedly connected to a low frame 14 and a high frame 16, the low frame 14 and the high frame 16 are vertically arranged, and the low frame 14 and the high frame 16 are connected to the outer frame 12. Two pairs of symmetrically arranged vertical frames 18 are slidably connected, each vertical frame 18 is fixedly connected with a movable mold 21, and multiple movable molds 21 are coupled in sequence. Multiple movable molds 21 are located inside the outer mold 11, so that the mold combination during bearing preparation can be performed by coupling the coupled multiple movable molds 21 with the outer mold 11, and powder metallurgy materials are added into the outer mold 11 and the multiple movable molds 21 to achieve the addition of raw materials. Multiple inner extension plates 41 are fixedly connected to the outer frame 12, and each inner extension plate 41 is fixedly connected with a cylinder I4 2. A stamping plate 43 is fixedly connected to the cylinder rods of the multiple cylinders Ⅰ42, and the stamping plate 43 is coupled with the outer mold 11 and the multiple movable molds 21, so as to start the multiple cylinders Ⅰ42, and the cylinder rods of the multiple cylinders Ⅰ42 drive the stamping plate 43 to rise and fall to stamp the material between the lower outer mold 11 and the multiple movable molds 21, so as to realize the stamping of the powder metallurgy forming of the bearing outer ring. After the lower part of the bearing outer ring is stamped, the lower frame 14 and the high frame 16 are driven to rise and fall by the rotation of the multiple screw rods Ⅰ13, and the low frame 14 and the high frame 16 are It drives multiple stands 18 to rise and fall synchronously, and multiple movable molds 21 to rise and fall synchronously to form bearing outer rings of different heights. After the powder metallurgy forming of the bearing outer ring is completed, one pair of the two pairs of movable molds 21 is driven to rise and fall, while the other pair is kept stationary, so as to offset the two pairs of movable molds 21, thereby realizing the separation of multiple movable molds 21, and then the same pair of movable molds 21 are driven to slide close to each other to realize the demoulding of the formed bearing outer ring, and to unload the gear ring jacket prepared by powder metallurgy, so as to prepare for the next forming of the bearing outer ring.

[0027] refer to Figure 2 , 3 and 4, detailing an embodiment of a stepped bearing outer ring:

[0028] The outer wall of the middle portion of each movable mold 21 is provided with an arc-shaped protrusion, so that a bearing outer ring with a middle diameter larger than an end diameter can be formed.

[0029] refer to Figure 4, an embodiment of driving the two vertical frames 18 on the low frame 14 to slide and drive the two movable molds 21 to slide is described in detail:

[0030] The low frame 14 is rotatably connected with a screw rod Ⅱ15 which drives the corresponding two vertical frames 18 to slide synchronously in opposite directions. The screw rod Ⅱ15 is fixedly connected to the output shaft of the reduction motor Ⅱ, and the reduction motor Ⅱ is fixedly connected to the low frame 14. When the reduction motor Ⅱ is started, the reduction motor Ⅱ drives the screw rod Ⅱ15 to rotate. Under the rotation, the screw rod Ⅱ15 drives the corresponding two vertical frames 18 to slide through threads, driving the two movable molds 21 to slide on the low frame 14, and mold forming is performed for the molding of the bearing outer ring and the demolding of the molded bearing outer ring by separating the two movable molds 21. The two vertical frames 18 are respectively fixedly connected with screw sleeves Ⅱ which are driven by the screw rod Ⅱ15.

[0031] refer to Figure 4 , the embodiment of driving the remaining two uprights 18 to slide and drive the two movable molds 21 to slide is described in detail:

[0032] The overhead frame 16 is rotatably connected with a screw rod III17 which drives the corresponding two vertical frames 18 to slide synchronously in opposite directions. The screw rod III17 is fixedly connected to the output shaft of the reduction motor III, and the reduction motor III is fixedly connected to the overhead frame 16. The two vertical frames 18 are respectively fixedly connected with screw rod sleeves III which are driven by the screw rod III17. When the reduction motor III is started, the reduction motor III drives the screw rod III17 to rotate, and the screw rod III17 drives the two corresponding vertical frames 18 to slide on the overhead frame 16 through threads, so that the two vertical frames 18 drive the two movable molds 21 to slide, and mold molding is performed for the molding of the outer ring of the bearing and the demolding of the molded outer ring of the bearing is performed by separating the two movable molds 21.

[0033] refer to Figure 4 , an embodiment of driving the paired movable molds 21 to synchronously slide in opposite directions is described in detail:

[0034] The threads of the screw rods II 15 and III 17 are rotated in opposite directions from the middle to the ends, so that when the screw rods II 15 and III 17 rotate, they can drive the paired frames 18 thereon to slide synchronously in opposite directions, thereby coupling and separating the multiple movable molds 21 .

[0035] refer to Figure 1 and 5 , details the example of adding powder material into the mold:

[0036] The outer mold 11 is rotatably connected to a revolving frame 31, the revolving frame 31 is fixedly connected to a guide frame 34, the guide frame 34 is slidably connected to a moving frame 36, and the moving frame 36 is fixedly connected to a material guide frame 37 for adding powder to the outer mold 11 and the movable mold 21, so that powder material is added through the material guide frame 37, and the powder material at the discharge port falls into the mold, driving the revolving frame 31 to rotate, so that the discharge port of the material guide frame 37 is evenly dispersed along the rotating powder material and added into the mold. After the powder material is added, the moving frame 36 is driven to slide to drive the material guide frame 37 to slide, so as to avoid motion interference when driving the stamping plate 43 to rise and fall, thereby affecting the forming of the outer ring of the bearing.

[0037] refer to Figure 5 , the embodiment of adjusting the sliding of the material guide frame 37 is described in detail:

[0038] The guide frame 34 is fixedly connected with a cylinder II 35 which drives the movable frame 36 to slide. When the cylinder II 35 is started, the cylinder rod of the cylinder II 35 drives the movable frame 36 to slide, thereby driving the material guide frame 37 to slide. When adding powder material, the material guide frame 37 is driven to slide to the upper part of the mold to facilitate the evenly dispersed addition of the powder material. After the powder material is added, the movable frame 36 is driven to slide and reset to facilitate the subsequent stamping of the powder material.

[0039] refer to Figure 5 , an embodiment of driving the material guide frame 37 to rotate around the axis of the outer mold 11 is described in detail:

[0040] A gear ring 32 is fixedly connected to the rotating frame 31, and a side wheel 33 driving the gear ring 32 to rotate is rotatably connected to the outer wall of the outer mold 11. The side wheel 33 is fixedly connected to the output shaft of the reduction motor IV, and the reduction motor IV is fixedly connected to the outer mold 11. When the reduction motor IV is started, the reduction motor IV drives the side wheel 33 to rotate, and the side wheel 33 engages to drive the gear ring 32 to rotate, and the gear ring 32 drives the rotating frame 31 to rotate, thereby realizing the rotation of the material guide frame 37 around the axis of the outer mold 11, and further realizing the uniform and dispersed addition of powder material.

[0041] refer to Figure 4 and 6 , detailed description of the embodiment of the powder metallurgy forming bearing outer ring:

[0042] The height of the inner wall of the outer mold 11 is greater than twice the height of the movable mold 21, so that the two pairs of movable molds 21 can be staggered in the vertical direction, and then the two pairs of movable molds 21 can be driven close to the bearing outer ring that has been separated from the molding to achieve powder metallurgy processing of the bearing outer ring.

[0043] refer to Figure 1 , 4 , 5 and 6, detailed description of the embodiment of the powder metallurgy method forming the bearing outer ring:

[0044] A powder metallurgy method for preparing a bearing using the above-mentioned bearing preparation device comprises the following steps:

[0045] Step 1: driving multiple movable molds 21 to couple into a ring shape and couple with the bottom of the outer mold 11 to form the mold, adding metallurgical powder into the molding cavity between the outer mold 11 and the multiple movable molds 21 to complete the addition of powder material;

[0046] Step 2: driving the stamping plate 43 to move up and down to stamp the powder to form the outer ring of the bearing;

[0047] Step 3: driving multiple movable molds 21 to rise synchronously, and continuing to add metallurgical powder until the overall forming of the bearing outer ring is completed;

[0048] Step 4: Drive the multiple movable molds 21 to stagger and close up and down, disperse the multiple movable molds 21, demould the molded bearing outer ring, prepare for material removal and sintering, and the next processing of the bearing outer ring.

Claims

1. A bearing preparation device, characterized in that: The invention comprises an outer mold (11) and an outer frame (12) fixedly connected to the outer mold (11); a plurality of screw rods I (13) are rotatably connected to the outer frame (12); a low frame (14) and a high frame (16) are threadedly connected to the plurality of screw rods I (13); the low frame (14) and the high frame (16) are vertically arranged; two pairs of symmetrically arranged vertical frames (18) are slidably connected to the low frame (14) and the high frame (16); a movable mold (21) is fixedly connected to each vertical frame (18); the plurality of movable molds (21) are coupled in sequence; the plurality of movable molds (21) are located inside the outer mold (11); a plurality of inner extension plates (41) are fixedly connected to the outer frame (12); a cylinder I (42) is fixedly connected to each inner extension plate (41); a stamping plate (43) is fixedly connected to the cylinder rods of the plurality of cylinders I (42); the stamping plate (43) is coupled to the outer mold (11) and the plurality of movable molds (21).

2. A bearing preparation device according to claim 1, characterized in that: The outer wall of the middle part of each movable mold (21) is provided with an arc-shaped protrusion.

3. A bearing preparation device according to claim 1, characterized in that: The lower frame (14) is rotatably connected to a screw rod II (15) for driving the corresponding two vertical frames (18) to slide synchronously in opposite directions.

4. A bearing preparation device according to claim 1, characterized in that: The elevated frame (16) is rotatably connected with a screw rod III (17) for driving the corresponding two vertical frames (18) to slide synchronously in opposite directions.

5. A bearing preparation device according to any one of claims 3 and 4, characterized in that: The screw rod II (15) and the screw rod III (17) have opposite screw thread directions from the middle to both sides of the end.

6. A bearing preparation device according to claim 1, characterized in that: The outer mold (11) is rotatably connected to a revolving frame (31), the revolving frame (31) is fixedly connected to a guide frame (34), the guide frame (34) is slidably connected to a moving frame (36), and the moving frame (36) is fixedly connected to a material guide frame (37) for adding powder into the outer mold (11) and the moving mold (21).

7. A bearing preparation device according to claim 6, characterized in that: The guide frame (34) is fixedly connected with a cylinder II (35) for driving the moving frame (36) to slide.

8. A bearing preparation device according to claim 7, characterized in that: A gear ring (32) is fixedly connected to the revolving frame (31), and a side wheel (33) for driving the gear ring (32) to rotate is rotatably connected to the outer wall of the outer mold (11).

9. A bearing preparation device according to claim 1, characterized in that: The height of the inner wall of the outer mold (11) is greater than twice the height of the movable mold (21).

10. A powder metallurgy method for preparing bearings using a bearing preparation device according to any one of claims 1 to 9, characterized in that: The powder metallurgy method comprises the following steps: Step 1: driving a plurality of movable molds (21) to couple into a ring shape and to couple with the bottom of the outer mold (11), and adding metallurgical powder into the molding cavity between the outer mold (11) and the plurality of movable molds (21); Step 2: driving the stamping plate (43) to move up and down to stamp the powder for forming the outer ring of the bearing; Step 3: driving multiple movable molds (21) to rise synchronously, and continuing to add metallurgical powder until the overall forming of the bearing outer ring is completed; Step 4: driving the multiple movable molds (21) to stagger and close up and down, dispersing the multiple movable molds (21), demoulding the molded bearing outer ring, preparing for material removal and sintering as well as the next processing of the bearing outer ring.

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