Burr-free punching device and punching process for bearing retainer

Abstract

The invention relates to the technical field of bearing retainer punching, and discloses a bearing retainer burr-free punching device and a punching technology.The bearing retainer burr-free punching device comprises a workbench, a plurality of supporting legs are installed at the bottom of the workbench, and a fixing table, a punching base and a positioning assembly are installed on the surface of the workbench; the positioning assembly is arranged on the surface of the fixing table and comprises an electric push rod fixedly connected to the surface of the fixing table, the output end of the electric push rod is fixedly connected with a lower supporting block, and the top of the lower supporting block is fixedly connected with a connecting block and fixedly connected with an upper supporting block through the connecting block. The side, away from each other, of the upper supporting block and the side, away from each other, of the lower supporting block are sleeved with the holder body, and the punching assembly is arranged on the surface of the punching seat. And edge cracks or excessive deformation caused by punching are effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of punching holes of a bearing retainer, and more particularly to a burr-free punching device and a punching process for a bearing retainer. Background Art

[0002] The bearing cage is a key component in the bearing. Its main function is to keep the steel balls or rollers at appropriate intervals and prevent them from contacting or wearing each other. The design and material selection of the cage directly affect the performance, durability and working efficiency of the bearing. Since the bearing cage usually requires holes to locate the rollers, its processing requires punching on its surface.

[0003] At present, bearing cages are usually punched with rolling punching devices, that is, after punching a hole, the cage rotates a certain angle and then continues to punch the next hole. This rolling punching device has high working efficiency, but when processing deep groove ball bearing cages, since deep groove ball cages mostly use a structure of two half cages connected by rivets, deep groove ball cages are mostly processed one by one on each side, usually punching holes at their edges. Compared with punching holes in the center of the cage, edge punching is prone to structural deformation and is more likely to produce burrs, which is not conducive to the effective punching of the cage. Summary of the invention

[0004] The invention discloses a burr-free punching device and a punching process for a bearing retainer, which solve the technical problems in the above-mentioned background technology.

[0005] The first aspect of the present invention discloses a burr-free punching device for a bearing retainer, comprising a workbench, a plurality of legs are installed at the bottom of the workbench, and a fixing table and a punching seat are respectively installed on the surface of the workbench; A positioning assembly is arranged on the surface of the fixed platform, and the positioning assembly includes an electric push rod fixedly connected to the surface of the fixed platform, the output end of the electric push rod is fixedly connected to a lower support block, the top of the lower support block is fixedly connected to a connecting block, and the upper support block is fixedly connected through the connecting block, and a retaining frame body is sleeved on the side of the upper support block away from the lower support block; A punching assembly is arranged on the surface of the punching seat, and the punching assembly includes a cylinder fixedly connected to the surface of the punching seat, and the surface of the punching seat is also fixedly connected to a plurality of punching frames, and the top of the punching frame is fixedly connected to a plurality of vertical rods, and the surface of the vertical rod is slidably connected to a movable plate, and the surface of the movable plate is installed with a main punch for punching, and the movable plate is connected to the punching frame through a spring A; The surface of the upper support block is provided with a punching groove adapted to the main punch, and the surface of the workbench is also equipped with an adjustment component for rotating the retaining frame body.

[0006] Preferably, a first scraper and a second scraper are fixedly connected to the surface of the upper support block, respectively, and the first scraper and the second scraper are inclined at a certain angle.

[0007] Preferably, the adjustment assembly includes a fixed seat fixedly connected to the surface of the workbench, a ring is fixedly connected to the top of the fixed seat, a rotating ring is rotatably connected to the inner wall of the ring, a plurality of clamping blocks for clamping the retaining frame body are installed on the inner wall of the rotating ring, the rotating ring is connected to the clamping blocks through a plurality of positioning rods, a motor A is fixedly connected to the surface of the fixed table, a gear A is fixedly connected to the output end of the motor A, and a plurality of tooth grooves matching the gear A are opened on the surface of the rotating ring.

[0008] Preferably, a connecting tube is fixedly connected to the surface of the collar, the connecting tube is connected to the inside of the collar, and an air cavity is opened inside the rotating ring, the two ends of the air cavity are respectively connected to the positioning rod and the collar, and the connecting tube is connected to an external air pressure device.

[0009] Preferably, a secondary punch is inserted into the main punch, the secondary punch is located at the center of the main punch, and a connecting block is fixedly connected to the top of the secondary punch, and a top head adapted to the connecting block is fixedly connected to the output end of the cylinder.

[0010] Preferably, two springs B are fixedly connected to the bottom of the connection block, and the lower end of the spring B is fixedly connected to the main punch.

[0011] Preferably, a gear ring is fixedly connected to the surface of the main punch and is rotatably connected to the movable plate through the gear ring. A motor B is fixedly connected to the top of the movable plate, and a gear B is fixedly connected to the output end of the motor B, which meshes with the gear ring.

[0012] Preferably, a collecting groove is provided on the surface of the upper support block near the second scraper.

[0013] Preferably, a side of the connecting block close to the punching groove is arranged as an inclined surface.

[0014] A second aspect of the present invention discloses a burr-free punching process for a bearing retainer, comprising the following steps: S1: The retainer to be punched is mounted on the upper support block and the lower support block, and is clamped into the clamp block accordingly. The clamp block clamps and fixes the retainer by applying pressure through an external air pressure device. S2: In the initial state, the punch corresponds to the connecting block. At this time, the cylinder outputs, so that the punch contacts and presses down the connecting block. Further, the connecting block drives the auxiliary punch to move downward, first punching out a smaller hole on the surface of the cage, which is convenient for further punching in the future. S3: The cylinder then retracts and returns to the normal position, and the motor B is started, which drives the gear B (341) to rotate, and cooperates with the gear ring to rotate, so that the main punch rotates an angle, and the connecting block and the head are staggered. At this time, the cylinder outputs again, which will push the main punch and the auxiliary punch to move down at the same time to punch, and expand the hole based on the small hole punched out in step S2; S4: After a single hole is expanded, the output of motor A drives gear A to rotate, which in turn drives the rotating ring to rotate, drives the retaining frame to rotate a certain angle, and switches to the next pre-punching hole; S5: Repeat steps S1-S4 until the punching operation of all holes on the surface of the cage is completed.

[0015] The beneficial effects of the present invention are: The present invention facilitates supporting the retaining frame by cooperating with the upper support block and the lower support block, and a punching groove is provided on the top of the upper support block for facilitating punching, which can play a good supporting role without affecting normal punching, avoiding the problem of deformation of the retaining frame body caused by punching the edge. At the same time, by cooperating with the main punch and the auxiliary punch, step-by-step punching can make the internal stress distribution of the material more uniform, and by gradually expanding the hole, the plastic deformation of the material can be gradually guided, rather than applying the punching force all at once, effectively reducing the edge cracks or excessive deformation caused by punching. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the present invention for demonstrating a positioning component; Figure 3 The present invention is used to separately show the connection relationship between the lower support block, the connecting block and the upper support block; Figure 4 It is a schematic diagram of the present invention for showing the state of the positioning component and the adjustment component cooperating; Figure 5 is a schematic diagram of the present invention for separately showing the adjustment component; Figure 6 It is a cross-sectional view of the present invention for showing the internal structure of the rotating ring; Figure 7 is a schematic diagram of the present invention for illustrating a punching assembly; Figure 8 It is a cross-sectional view of the present invention for showing the internal structure of the main punch.

[0017] In the figure: 1. workbench; 11. support leg; 2. fixed table; 21. electric push rod; 211. lower support block; 212. connecting block; 213. upper support block; 214. first scraper; 215. second scraper; 216. collecting tank; 22. retaining frame body; 23. rotating ring; 231. clamping block; 232. positioning rod; 24. fixed seat; 241. sleeve ring; 242. connecting pipe; 243. air cavity; 25. motor A; 251. gear A; 3. punching seat; 31. cylinder; 311. top head; 32. punching frame; 321. movable plate; 322. vertical rod; 323. spring A; 33. main punch; 331. auxiliary punch; 332. connecting block; 333. spring B; 34. motor B; 341. gear B; 342. gear ring. DETAILED DESCRIPTION

[0018] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the present specification. Various examples may omit, replace, or add various processes or components as needed. In addition, the features described in some examples may also be combined in other examples.

[0019] Embodiment 1: The embodiment of the present invention discloses a burr-free punching device for a bearing retainer, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes a workbench 1, and a plurality of legs 11 are installed at the bottom of the workbench 1 for supporting the workbench 1. The legs 11 can be four or other supporting numbers. A fixed platform 2 and a punching seat 3 are respectively installed on the surface of the workbench 1. The fixed platform 2 and the punching seat 3 are connected to the surface of the workbench 1 by welding or threaded fixing. It also includes a positioning component, which is arranged on the surface of the fixed platform 2. The positioning component includes an electric push rod 21 fixedly connected to the surface of the fixed platform 2. The output end of the electric push rod 21 is fixedly connected to a lower support block 211, the top of the lower support block 211 is fixedly connected to a connecting block 212, and an upper support block 213 is fixedly connected through the connecting block 212. The upper support block 213 and the lower support block 211 are on the side away from each other with a retaining frame body 22. Correspondingly, the upper support block 213 and the lower support block 211 are on the side away from each other. Both are set to a circular arc shape that matches the inner wall shape of the retaining frame body 22, so as to effectively support the retaining frame body 22 during punching.

[0020] The punching assembly is arranged on the surface of the punching seat 3, and the punching assembly includes a cylinder 31 fixedly connected to the surface of the punching seat 3. A plurality of punching frames 32 are also fixedly connected to the surface of the punching seat 3. A plurality of vertical rods 322 are fixedly connected to the top of the punching frame 32. A movable plate 321 is slidably connected to the surface of the vertical rod 322. A main punch 33 for punching is installed on the surface of the movable plate 321. The movable plate 321 is connected to the punching frame 32 through a spring A323. The two ends of the spring A323 are respectively fixedly connected to the movable plate 321 and the punching frame 32.

[0021] A punching groove adapted to the main punch 33 is provided on the surface of the upper support block 213. The setting of the punching groove facilitates the upper support block 213 to support the retaining frame body 22 while effectively avoiding the upper support block 213 from obstructing the main punch 33. An adjustment component for rotating the retaining frame body 22 is also installed on the surface of the workbench 1.

[0022] Specifically, when punching, the retaining frame body 22 is supported by the upper support block 213 and the lower support block 211, and a punching groove is opened on the surface of the upper support block 213 to reserve a punching position. Then, through the output of the cylinder 31, the movable plate 321 is pushed downward and the spring A323 is compressed accordingly, so that the main punch 33 moves downward and punches a hole on the surface of the retaining frame body 22. The hole is effectively supported by the upper support block 213 to avoid excessive deformation.

[0023] Furthermore, in the present embodiment, the first scraper 214 and the second scraper 215 are fixedly connected to the surface of the upper support block 213 respectively, and the first scraper 214 and the second scraper 215 are inclined at a certain angle, that is, the first scraper 214 and the second scraper 215 are arranged opposite to each other, and the blades are both arranged upwards. By arranging the first scraper 214 and the second scraper 215, when the punching of a single hole is completed, the upper support block 213 is driven to slide on the inner wall of the retaining frame body 22 through the output of the electric push rod 21, and the first scraper 214 can scrape off the burrs after punching, and then the electric push rod 21 contracts, so that the upper support block 213 moves in the opposite direction. At this time, the second scraper 215 arranged opposite to the first scraper 214 can scrape off the burrs in the other direction in the opposite direction, effectively avoiding the problem of unclean burr scraping caused by unidirectional scraping, and improving the efficiency of burr-free punching to a certain extent.

[0024] like Figure 4 , Figure 5 and Figure 6As shown, in this embodiment, the adjustment component includes a fixed seat 24 fixedly connected to the surface of the workbench 1, a ring 241 is fixedly connected to the top of the fixed seat 24, a rotating ring 23 is rotatably connected to the inner wall of the ring 241, and a plurality of clamping blocks 231 for clamping the retaining frame body 22 are installed on the inner wall of the rotating ring 23. The clamping blocks 231 can be set to two or more, and are set to two in this article. The rotating ring 23 is connected to the clamping blocks 231 through a plurality of positioning rods 232, so that the clamping blocks 231 can slide along the positioning rods 232, and a motor A25 is fixedly connected to the surface of the fixed table 2, and a gear A251 is fixedly connected to the output end of the motor A25. A plurality of tooth grooves adapted to the gear A251 are provided on the surface of the rotating ring 23. The output of the motor A25 can drive the gear A251 to rotate, thereby making the tooth groove matched therewith movable, so that the rotating ring 23 drives the clamping blocks 231 to rotate, and adjusts the angle of the clamped retaining frame body 22 accordingly, so as to facilitate rotation and continuous punching.

[0025] Furthermore, a connecting pipe 242 is fixedly connected to the surface of the collar 241, the connecting pipe 242 is connected to the inside of the collar 241, and an air cavity 243 is opened inside the rotating ring 23, the two ends of the air cavity 243 are respectively connected to the positioning rod 232 and the collar 241, and the connecting pipe 242 is connected to the external air pressure equipment.

[0026] Specifically, gas is applied to the connecting tube 242 through external air pressure equipment to increase the pressure. The gas passes through the ring 241, the air cavity 243 and the positioning rod 232 respectively, and pushes the clamping block 231 to move forward on the surface of the positioning rod 232 to clamp the retaining frame body 22, thereby realizing pneumatic clamping. Moreover, since the ring 241 is fixed, the rotation of the rotating ring 23 will not affect the ring 241 and the connecting tube 242.

[0027] like Figure 7 and Figure 8 As shown, in this embodiment, a secondary punch 331 is inserted into the main punch 33, the diameter of the secondary punch 331 is smaller than that of the main punch 33, the secondary punch 331 is located at the center of the main punch 33, and a connecting block 332 is fixedly connected to the top of the secondary punch 331, and a top head 311 adapted to the connecting block 332 is fixedly connected to the output end of the cylinder 31.

[0028] Furthermore, in the present embodiment, two springs B333 are fixedly connected to the bottom of the connection block 332 , and the lower end of the spring B333 is fixedly connected to the main punch 33 .

[0029] Specifically, through the setting of the auxiliary punch 331, under normal conditions, the position of the top head 311 is adapted to the connecting block 332. Therefore, the output of the cylinder 31 will drive the top head 311 to press down the connecting block 332, but will not drive the main punch 33 to move downward. At this time, the downward moving connecting block 332 pushes the auxiliary punch 331 to first punch out a smaller pre-punched hole on the surface of the retaining frame body 22, so as to reduce the stress concentration caused by the secondary punching and the surface deformation of the retaining frame body 22 caused by the direct punching.

[0030] Among them, a gear ring 342 is fixedly connected to the surface of the main punch 33, and is rotatably connected to the movable plate 321 through the gear ring 342. A motor B34 is fixedly connected to the top of the movable plate 321, and a gear B341 is fixedly connected to the output end of the motor B34, and the gear B341 is meshed with the gear ring 342.

[0031] Specifically, after the auxiliary punch 331 completes the punching, the output of the motor B34 drives the gear B341 to rotate, and the gear ring 342 meshing with the gear B341 also rotates synchronously, and drives the main punch 33 to rotate, so that the connecting block 332 rotates synchronously and adjusts the angle, and is staggered with the synchronous position of the top head 311. In this way, when the cylinder 31 continues to output, the downward movement of the top head 311 will also move the main punch 33 and the connecting block 332 downward together. At this time, the main punch 33 is used to further punch the hole that has been punched by the auxiliary punch 331. At this time, the punching area is smaller, which effectively reduces the punching resistance and deformation possibility, and improves the punching success rate.

[0032] A collecting groove 216 is provided on the surface of the upper support block 213 near the second scraper 215, wherein the collecting groove 216 is used to collect burrs of the mobile phone scraped off by the second scraper 215, and then the burrs and impurities in the collecting groove 216 can be blown out by air blowing or other methods.

[0033] The side of the connecting block 212 close to the punching groove is set as an inclined surface. By setting this side as an inclined surface, it is convenient for the waste of the retaining frame body 22 punched out from the top to slide down this inclined surface, avoiding the accumulation of debris and fragments on the surface of the lower support block 211, and a collection groove can be opened on the surface of the workbench 1 near the bottom of the connecting block 212 to collect the punching waste.

[0034] Embodiment 2: This embodiment discloses a burr-free punching process for a bearing retainer, comprising the following steps: S1: The retainer to be punched is mounted on the upper support block 213 and the lower support block 211, and is clamped into the clamp block 231 accordingly. The clamp block 231 clamps and fixes the retainer by applying pressure through an external air pressure device; S2: In the initial state, the punch 311 corresponds to the connecting block 332. At this time, the cylinder 31 outputs, so that the punch 311 contacts and presses down the connecting block 332. Further, the connecting block 332 drives the auxiliary punch 331 to move downward, first punching out a smaller hole on the surface of the retainer, which is convenient for further punching in the future. S3: Then the cylinder 31 shrinks back to the normal position, and the motor B34 is started, which drives the gear B341 to rotate, and cooperates with the gear ring 342 to rotate, so that the main punch 33 rotates an angle, and the connecting block 332 is staggered with the head 311. At this time, the cylinder 31 is output again, which will push the main punch 33 and the auxiliary punch 331 to move down at the same time to punch, and expand the hole based on the small hole punched out in step S2; S4: After a single hole is expanded, the output of motor A25 drives gear A251 to rotate, which in turn cooperates with the rotating ring 23 to rotate, driving the retainer to rotate a certain angle and switch to the next pre-punching hole; S5: Repeat steps S1-S4 until the punching operation of all holes on the surface of the cage is completed.

[0035] The above describes an embodiment of the present invention, but this embodiment is not limited to the above-mentioned specific implementation mode. The above-mentioned specific implementation mode is merely illustrative and not restrictive. Under the guidance of this embodiment, ordinary technicians in this field can also make more forms of equivalent embodiments, all of which are within the protection of this embodiment.

Claims

1. A burr-free punching device for a bearing cage, characterized in that: include: A workbench (1), wherein a fixing table (2) and a punching seat (3) are respectively installed on the surface of the workbench (1); A positioning assembly is arranged on the surface of the fixing platform (2), the positioning assembly comprising an electric push rod (21) fixedly connected to the surface of the fixing platform (2), the output end of the electric push rod (21) being fixedly connected to a lower support block (211), the top of the lower support block (211) being fixedly connected to a connecting block (212), and being fixedly connected to an upper support block (213) via the connecting block (212), and a retaining frame body (22) being sleeved on a side of the upper support block (213) that is away from the lower support block (211); A punching assembly is arranged on the surface of the punching seat (3), the punching assembly comprises a cylinder (31) fixedly connected to the surface of the punching seat (3), a plurality of punching frames (32) are also fixedly connected to the surface of the punching seat (3), a plurality of vertical rods (322) are fixedly connected to the top of the punching frame (32), a movable plate (321) is slidably connected to the surface of the vertical rod (322), a main punch (33) for punching is installed on the surface of the movable plate (321), and the movable plate (321) is connected to the punching frame (32) via a spring A (323); A punching groove adapted to the main punch (33) is provided on the surface of the upper support block (213), and an adjustment component for rotating the retaining frame body (22) is also installed on the surface of the workbench (1).

2. A burr-free punching device for a bearing retainer according to claim 1, characterized in that: A first scraper (214) and a second scraper (215) are respectively fixedly connected to the surface of the upper support block (213); the first scraper (214) and the second scraper (215) are arranged to be inclined at a certain angle.

3. A burr-free punching device for a bearing retainer according to claim 1, characterized in that: The adjustment assembly comprises a fixed seat (24) fixedly connected to the surface of the workbench (1), a collar (241) fixedly connected to the top of the fixed seat (24), a rotating ring (23) rotatably connected to the inner wall of the collar (241), a plurality of clamping blocks (231) for clamping a retaining frame body (22) mounted on the inner wall of the rotating ring (23), the rotating ring (23) being connected to the clamping blocks (231) via a plurality of positioning rods (232), a motor A (25) fixedly connected to the surface of the fixed table (2), a gear A (251) fixedly connected to the output end of the motor A (25), and a plurality of tooth grooves matching the gear A (251) being provided on the surface of the rotating ring (23).

4. A burr-free punching device for a bearing retainer according to claim 3, characterized in that: A connecting tube (242) is fixedly connected to the surface of the collar (241), the connecting tube (242) is communicated with the inside of the collar (241), and an air cavity (243) is provided inside the rotating ring (23), the two ends of the air cavity (243) are respectively communicated with the positioning rod (232) and the collar (241), and the connecting tube (242) is connected to an external air pressure device.

5. The burr-free punching device for a bearing retainer according to claim 1, characterized in that: An auxiliary punch (331) is inserted into the main punch (33), the auxiliary punch (331) is located at the center of the main punch (33), and a connecting block (332) is fixedly connected to the top of the auxiliary punch (331), and a top head (311) adapted to the connecting block (332) is fixedly connected to the output end of the cylinder (31).

6. A burr-free punching device for a bearing retainer according to claim 5, characterized in that: Two springs B (333) are fixedly connected to the bottom of the connection block (332), and the lower ends of the springs B (333) are fixedly connected to the main punch (33).

7. A burr-free punching device for a bearing retainer according to claim 5, characterized in that: A toothed ring (342) is fixedly connected to the surface of the main punch (33), and the main punch (33) is rotatably connected to the movable plate (321) via the toothed ring (342). A motor B (34) is fixedly connected to the top of the movable plate (321), and a gear B (341) is fixedly connected to the output end of the motor B (34), and the gear B (341) is meshed with the toothed ring (342).

8. A burr-free punching device for a bearing retainer according to claim 2, characterized in that: A collecting groove (216) is provided on the surface of the upper support block (213) near the second scraper (215).

9. The burr-free punching device for a bearing retainer according to claim 1, characterized in that: A side of the connection block (212) close to the punching groove is arranged as an inclined surface.

10. A burr-free punching process for a bearing cage, applied to a burr-free punching device for a bearing cage as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1: The retainer to be punched is mounted on the surfaces of the upper support block (213) and the lower support block (211), and is clamped into the clamp block (231) accordingly, and pressure is applied by an external air pressure device so that the clamp block (231) clamps and fixes the retainer; S2: In the initial state, the ejector head (311) corresponds to the connecting block (332), and the cylinder (31) is output, so that the ejector head (311) contacts and presses down the connecting block (332). Further, the connecting block (332) drives the auxiliary punch (331) to move downward, and first punches out a hole with a smaller size on the surface of the retainer, so as to facilitate further punching in the future; S3: The cylinder (31) then shrinks back to the normal position and starts the motor B (34), which drives the gear B (341) to rotate and cooperates with the gear ring (342) to rotate, so that the main punch (33) rotates at an angle, and the connecting block (332) and the top head (311) are staggered. At this time, the cylinder (31) is output again, which will push the main punch (33) and the auxiliary punch (331) to move downward at the same time to punch, and expand the hole based on the small hole punched in step S2; S4: After a single hole position is expanded, the output of the motor A (25) drives the gear A (251) to rotate, thereby cooperating with the rotating ring (23) to rotate, driving the retaining frame to rotate a certain angle, and switching to the next pre-punching hole position; S5: Repeat steps S1-S4 until the punching operation of all holes on the surface of the cage is completed.

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