Special Machine Method for Drilling and Tapping the Outer Ring of Hub Bearings

Abstract

The present invention relates to the technical field of numerical control machine tools for automated processing, specifically a special machine method for drilling and tapping the outer ring of hub bearings, including positioning and clamping the outer ring of the hub bearing, then performing drilling, chamfering, and tapping operations, extracting waste chips through a mounting frame, and finally collecting waste chips through a chip removal rack. The special drilling and tapping machine of the present invention is arranged in a horizontal double-sided and double-station form, clamping one part at a time, with two sets of special drilling and chamfering spindle boxes and one set of tapping spindle boxes arranged on both sides. After the part is positioned and clamped on the fixture, the numerical control slide table carries the spindle box to feed and complete the processes of drilling and chamfering, reverse chamfering, and tapping at three stations respectively. During use, the drilling, tapping, and chamfering operations of multiple holes of one part can be completed simultaneously, and several workpieces can be continuously processed without interruption during actual processing, having the advantages of high work efficiency, low processing cost, and high product quality stability.

Description

Technical Field

[0001] The invention relates to the technical field of automated processing numerically controlled machine tools, in particular to a method for drilling and tapping the outer wheel of a hub bearing. Background Art

[0002] Currently, wheel hub outer ring drilling and tapping processes mostly consist of a drilling machine, a tapping machine, and a chamfering machine. Each machine is staffed by a single operator, who sequentially completes the drilling, tapping, and chamfering processes for each hole in the part. This results in low efficiency, high labor intensity, a low degree of automation, and poor product dimensional consistency, making it impossible to meet the requirements of mass production.

[0003] To this end, we proposed a special method for drilling and tapping the outer wheel of the hub bearing. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a method for drilling and tapping the outer wheel of a hub bearing, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a method for drilling and tapping the outer wheel of a hub bearing, specifically comprising the following steps:

[0006] Step 1: Place the outer wheel of the hub bearing into the discharge hole inside the clamping frame, then use the rotating frame to drive the first servo electric cylinder to rotate, and use the driving end of the first servo electric cylinder to drive the first limit frame to approach the outer wheel of the hub bearing. Use the first limit frames on both sides to limit the two sides of the outer wheel of the hub bearing. At the same time, control the driving end of the second servo electric cylinder inside the connecting frame to drive the second limit frame to move downward to limit the top of the outer wheel of the hub bearing.

[0007] Step 2: The mounting frame and the clamping frame on the top are driven to move along the slide rail by the mobile workbench. The drilling station, chamfering station and tapping station on the top of the tapping frame are used to perform drilling, chamfering and tapping operations on the outer wheel of the hub bearing inside the clamping frame. After the processing of the outer wheel of the hub bearing is completed, the drilling station, chamfering station and tapping station return to their original positions.

[0008] Step 3: When drilling and tapping the outer wheel of the hub bearing, small waste chips generated by drilling and tapping fall onto the mounting frame. At this time, the vacuum pump inside the vacuum frame cooperates with the material guide pipe to generate negative pressure inside the vacuum port, thereby sucking away the small waste chips on the mounting frame. The waste chips are then sent into the waste cavity by the vacuum pump.

[0009] Step 4: After the clamping rack drives the outer wheel of the hub bearing to complete the drilling and tapping operations, the moving workbench drives the mounting rack to displace to one side of the chip removal rack. At this time, the driving end of the third servo cylinder drives the movable baffle to move upward, so that one end of the discharge pipe is inserted into the inside of the waste cavity, and the waste chips inside the waste cavity are extracted by the cooperation of the discharge pipe and the chip removal rack, realizing the automatic cleaning of the waste inside the waste cavity.

[0010] Preferably, the top of the tapping rack is respectively provided with a drilling station, a chamfering station and a tapping station. The drilling station and the chamfering station are arranged opposite to each other. The top of the tapping rack is also provided with a slide rail, and the top of the slide rail is provided with a moving workbench. The two sides of the tapping rack are respectively provided with a loading rack and an unloading rack, and a chip removal rack is also provided on one side of the unloading rack. The two ends of the slide rail respectively extend above the loading rack and the unloading rack.

[0011] Preferably, the top of the moving workbench is provided with a mounting rack, and the top of the mounting rack is provided with a clamping rack. The inside of the clamping rack is provided with a loading hole, and limiting components are arranged on both sides of the loading hole. The limiting components include a first limiting rack and a second limiting rack. Rotating racks are arranged on both sides of the inside of the clamping rack and inside the loading hole, and a first servo cylinder is arranged on one side of each of the two rotating racks. The driving end of the first servo cylinder is provided with a first limiting rack, and a limiting groove is arranged on one side of the first limiting rack.

[0012] Preferably, a connecting rack is arranged above the loading hole on one side of the clamping rack, and two second servo cylinders are arranged inside the connecting rack. A second limiting rack is arranged below the connecting rack, and the driving ends of the two second servo cylinders are respectively connected to both sides of the top of the second limiting rack.

[0013] Preferably, a dust suction rack is also arranged on one side of the mounting rack. A waste cavity is arranged inside the dust suction rack. A discharge port is arranged on one side of the waste cavity, and a movable baffle is movably arranged inside the discharge port. Dust suction ports are arranged on the front and rear sides of the clamping rack on the top of the mounting rack, and guide pipes are arranged on one side of each of the two dust suction ports.

[0014] Preferably, a dust suction pump is arranged above the inside of the dust suction rack, and the feeding end of the dust suction pump is connected to one end of the guide pipe. The discharging end of the dust suction pump is communicated with the inside of the waste cavity. A third servo cylinder is arranged on one side of the inside of the dust suction rack, and the driving end of the third servo cylinder is connected to the top of the movable baffle.

[0015] Preferably, a discharge pipe is arranged on one side of the chip removal rack, and the discharge pipe is matched with the discharge port.

[0016] Compared with the prior art, the following beneficial effects are achieved:

[0017] 1. The drilling and tapping special machine adopts a horizontal double-sided and double-station layout. One part is clamped at a time, and two sets of special drilling (chamfering) spindle boxes and one tapping spindle box are arranged on both sides. A numerical control slide is configured under the spindle boxes on both sides to achieve the forward and backward feeding of the Z-axis. The fixture is installed on the numerical control moving workbench of the X-axis. After the part is positioned and clamped on the fixture, the numerical control slide carries the spindle box to feed and complete the processes of drilling and chamfering, reverse chamfering, and tapping at three stations respectively. After completion, the spindle box retracts to the original position. After the fixture is loosened, the next product is processed, and the cycle continues. During use, multiple holes of one part can be drilled, tapped, and chamfered simultaneously. During actual processing, several workpieces can be continuously and uninterruptedly processed, which has the advantages of high work efficiency, low processing cost, and high product quality stability. In addition, this solution simply and efficiently realizes the integration of all processes of drilling, tapping, and chamfering, and can simultaneously process several holes of a single part through the coordinated use of tooling fixtures, solving the defects of high equipment cost, large floor area, and high personnel cost of the traditional production line composed of drilling equipment, tapping equipment, and chamfering equipment.

[0018] 2. The suction pump inside the dust suction frame cooperates with the material guide pipe to generate negative pressure inside the suction port, thereby sucking away the fine waste chips on the mounting frame. Then, the waste chips are sent into the waste chamber by the suction pump to ensure the cleanliness of the surface of the processing equipment. The driving end of the third servo cylinder drives the movable baffle to move upward, so that one end of the discharge pipe is inserted into the waste chamber, and the waste chips inside the waste chamber are extracted by the discharge pipe in cooperation with the chip discharge rack, realizing the automatic cleaning of the waste inside the waste chamber. Description of the Drawings

[0019] Figure 1 It is a flowchart of the method for the drilling and tapping special machine of the outer wheel of the hub bearing in the embodiment of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the tapping rack in the embodiment of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure of the mounting frame and the material clamping frame in the embodiment of the present invention;

[0022] Figure 4 It is a schematic diagram of the internal structure of the dust suction frame and the mounting frame in the embodiment of the present invention.

[0023] In the figure, 1 is a tapping rack; 2 is a drilling station; 3 is a chamfering station; 4 is a tapping station; 5 is a slide rail; 6 is a moving workbench; 7 is a loading rack; 8 is an unloading rack; 9 is a chip removal rack; 11 is a mounting rack; 12 is a clamping rack; 13 is a loading hole; 14 is a first limiting rack; 15 is a second limiting rack; 16 is a rotating rack; 17 is a first servo electric cylinder; 18 is a connecting rack; 19 is a second servo electric cylinder; 21 is a dust suction rack; 22 is a waste cavity; 23 is a discharge port; 24 is a movable baffle; 25 is a dust suction port; 26 is a material guiding pipe; 27 is a dust suction pump; 28 is a third servo electric cylinder; 29 is a discharge pipe. Detailed implementation manner

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] Embodiment 1

[0026] Please refer to Figures 1 to 4 As shown, the method of a special drilling and tapping machine for the outer ring of a hub bearing specifically includes the following steps:

[0027] Step 1: Place the outer ring of the hub bearing into the loading hole 13 inside the clamping rack 12. Then, drive the first servo electric cylinder 17 to rotate by using the rotating rack 16. Drive the first limiting rack 14 to approach the outer ring of the hub bearing through the driving end of the first servo electric cylinder 17. Limit both sides of the outer ring of the hub bearing by using the first limiting racks 14 on both sides. At the same time, control the driving end of the second servo electric cylinder 19 inside the connecting rack 18 to drive the second limiting rack 15 to move downward to limit the top of the outer ring of the hub bearing.

[0028] Step 2: Drive the mounting rack 11 and the clamping rack 12 on the top along the slide rail 5 by using the moving workbench 6. Perform drilling, chamfering, and tapping processing operations on the outer ring of the hub bearing inside the clamping rack 12 by using the drilling station 2, the chamfering station 3, and the tapping station 4 on the tapping rack 1. After completing the processing of the outer ring of the hub bearing, the drilling station 2, the chamfering station 3, and the tapping station 4 return to their original positions.

[0029] Step 3: When drilling and tapping the outer ring of the hub bearing, the fine waste chips generated by drilling and tapping fall on the mounting rack 11. At this time, generate negative pressure inside the dust suction port 25 by using the dust suction pump 27 inside the dust suction rack 21 in cooperation with the material guiding pipe 26, so as to suck away the fine waste chips on the mounting rack 11. Then, send the waste chips into the waste cavity 22 through the dust suction pump 27.

[0030] Step 4: After the clamping frame 12 drives the outer wheel of the hub bearing to complete the drilling and tapping process, the moving workbench 6 drives the mounting frame 11 to displace to one side of the chip removal rack 9. At this time, the driving end of the third servo cylinder 28 drives the movable baffle 24 to move upward, so that one end of the discharge pipe 29 is inserted into the inside of the waste cavity 22, and the waste chips inside the waste cavity 22 are extracted by using the discharge pipe 29 in cooperation with the chip removal rack 9, realizing the automatic cleaning of the waste inside the waste cavity 22.

[0031] Embodiment 2

[0032] Furthermore, a drilling station 2, a chamfering station 3, and a tapping station 4 are respectively arranged at the top of the tapping machine frame 1. The drilling station 2 and the chamfering station 3 are arranged oppositely. A slide rail 5 is also arranged at the top of the tapping machine frame 1, and a moving workbench 6 is arranged at the top of the slide rail 5. Feeding racks 7 and discharging racks 8 are respectively arranged on both sides of the tapping machine frame 1, and a chip removal rack 9 is also arranged on one side of the discharging rack 8. Both ends of the slide rail 5 respectively extend above the feeding rack 7 and the discharging rack 8;

[0033] A mounting frame 11 is arranged at the top of the moving workbench 6, and a clamping frame 12 is arranged at the top of the mounting frame 11. A feeding hole 13 is arranged inside the clamping frame 12, and limiting components are arranged on both sides of the feeding hole 13. The limiting components include a first limiting frame 14 and a second limiting frame 15. Rotating frames 16 are arranged on both sides inside the clamping frame 12 and located inside the feeding hole 13, and a first servo cylinder 17 is arranged on one side of each of the two rotating frames 16. The driving end of the first servo cylinder 17 is provided with the first limiting frame 14, and a limiting groove is arranged on one side of the first limiting frame 14. A connecting frame 18 is arranged on one side of the clamping frame 12 and above the feeding hole 13, and two second servo cylinders 19 are arranged inside the connecting frame 18. A second limiting frame 15 is arranged below the connecting frame 18, and the driving ends of the two second servo cylinders 19 are respectively connected to both sides of the top of the second limiting frame 15.

[0034] It should be noted that when drilling and tapping the outer wheel of the hub bearing, first, the outer wheel of the hub bearing is placed into the feeding hole 13 inside the clamping frame 12. Then, the rotating frame 16 drives the first servo cylinder 17 to rotate. The driving end of the first servo cylinder 17 drives the first limiting frame 14 to approach the outer wheel of the hub bearing, and the two first limiting frames 14 on both sides are used to limit both sides of the outer wheel of the hub bearing. At the same time, the driving ends of the second servo cylinders 19 inside the connecting frame 18 are controlled to drive the second limiting frame 15 to move downward to limit the top of the outer wheel of the hub bearing, realizing the rapid positioning and clamping of the outer wheel of the hub bearing, thereby improving the drilling and tapping processing efficiency of the outer wheel of the hub bearing.

[0035] Further, a dust suction frame 21 is also provided on one side of the mounting frame 11. A waste material chamber 22 is arranged inside the dust suction frame 21. A discharge port 23 is arranged on one side of the waste material chamber 22. And a movable baffle 24 is movably arranged inside the discharge port 23. Dust suction ports 25 are arranged on the top of the mounting frame 11 and on the front and rear sides of the clamping frame 12. And a guide pipe 26 is arranged on one side of each of the two dust suction ports 25. A dust suction pump 27 is arranged above the inside of the dust suction frame 21. And the feeding end of the dust suction pump 27 is connected to one end of the guide pipe 26. The discharging end of the dust suction pump 27 is communicated with the inside of the waste material chamber 22. A third servo cylinder 28 is arranged on one side of the inside of the dust suction frame 21. And the driving end of the third servo cylinder 28 is connected to the top of the movable baffle 24.

[0036] It should be noted that when drilling and tapping the outer ring of the hub bearing, the fine waste chips generated by drilling and tapping fall on the mounting frame 11. At this time, the dust suction pump 27 inside the dust suction frame 21 cooperates with the guide pipe 26 to generate negative pressure inside the dust suction port 25, so as to suck away the fine waste chips on the mounting frame 11. Then, the waste chips are sent into the inside of the waste material chamber 22 through the dust suction pump 27, ensuring the cleanliness of the surface of the processing equipment.

[0037] Further, a discharge pipe 29 is arranged on one side of the chip discharge frame 9. And the discharge pipe 29 is matched with the discharge port 23. After the clamping frame 12 drives the outer ring of the hub bearing to complete the drilling and tapping process, the moving workbench 6 drives the mounting frame 11 to move to one side of the chip discharge frame 9. At this time, the driving end of the third servo cylinder 28 drives the movable baffle 24 to move upward, so that one end of the discharge pipe 29 is inserted into the inside of the waste material chamber 22. The discharge pipe 29 cooperates with the chip discharge frame 9 to extract the waste chips inside the waste material chamber 22, realizing the automatic cleaning of the waste inside the waste material chamber 22.

[0038] Meanwhile, the content not described in detail in this specification belongs to the well-known prior art in the art.

[0039] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for drilling and tapping using a special drilling and tapping machine for the outer ring of a hub bearing, characterized in that: At the top of the tapping rack (1), a drilling station (2), a chamfering station (3) and a tapping station (4) are respectively arranged. The drilling station (2) and the chamfering station (3) are arranged opposite to each other. On the top of the tapping rack (1), a slide rail (5) is further arranged, and a moving workbench (6) is arranged on the top of the slide rail (5). On both sides of the tapping rack (1), a loading rack (7) and an unloading rack (8) are respectively arranged. On one side of the unloading rack (8), a chip removal rack (9) is further arranged. The two ends of the slide rail (5) respectively extend above the loading rack (7) and the unloading rack (8). On the top of the moving workbench (6), a mounting rack (11) is arranged, and on the top of the mounting rack (11), a clamping rack (12) is arranged. Inside the clamping rack (12), a loading hole (13) is arranged, and limiting components are arranged on both sides of the loading hole (13). The limiting components include a first limiting rack (14) and a second limiting rack (15). Inside the clamping rack (12) and on both sides inside the loading hole (13), rotating racks (16) are arranged. On one side of each of the two rotating racks (16), a first servo cylinder (17) is arranged. The driving end of the first servo cylinder (17) is provided with the first limiting rack (14), and a limiting groove is arranged on one side of the first limiting rack (14). On one side of the clamping rack (12) and above the loading hole (13), a connecting rack (18) is arranged, and two second servo cylinders (19) are arranged inside the connecting rack (18). Below the connecting rack (18), the second limiting rack (15) is arranged, and the driving ends of the two second servo cylinders (19) are respectively connected to both sides of the top of the second limiting rack (15); On one side of the mounting rack (11), a dust suction rack (21) is further arranged. Inside the dust suction rack (21), a waste cavity (22) is arranged. On one side of the waste cavity (22), a discharge port (23) is arranged, and a movable baffle (24) is movably arranged inside the discharge port (23). On the top of the mounting rack (11) and on the front and rear sides of the clamping rack (12), dust suction ports (25) are arranged, and on one side of each of the two dust suction ports (25), a guide pipe (26) is arranged. Above the inside of the dust suction rack (21), a dust suction pump (27) is arranged, and the feed end of the dust suction pump (27) is connected to one end of the guide pipe (26). The discharge end of the dust suction pump (27) is communicated with the inside of the waste cavity (22). On one side of the inside of the dust suction rack (21), a third servo cylinder (28) is arranged, and the driving end of the third servo cylinder (28) is connected to the top of the movable baffle (24). On one side of the chip removal rack (9), a discharge pipe (29) is arranged, and the discharge pipe (29) is matched with the discharge port (23); The method for drilling and tapping specifically includes the following steps: Step 1: Place the outer wheel of the hub bearing into the feeding hole (13) inside the material clamping frame (12). Then, drive the first servo cylinder (17) to rotate by using the rotating frame (16). Drive the first limiting frame (14) to approach the outer wheel of the hub bearing through the driving end of the first servo cylinder (17). Use the first limiting frames (14) on both sides to limit both sides of the outer wheel of the hub bearing. At the same time, control the driving end of the second servo cylinder (19) inside the connecting frame (18) to drive the second limiting frame (15) to move downward to limit the top of the outer wheel of the hub bearing. Step 2: Drive the mounting frame (11) and the material clamping frame (12) on the top along the slide rail (5) by moving the workbench (6). Use the drilling station (2), chamfering station (3), and tapping station (4) on the top of the tapping machine frame (1) to perform drilling, chamfering, and tapping operations on the outer wheel of the hub bearing inside the material clamping frame (12). After completing the processing of the outer wheel of the hub bearing, the drilling station (2), chamfering station (3), and tapping station (4) return to their original positions. Step 3: When drilling and tapping the outer wheel of the hub bearing, the fine waste chips generated by drilling and tapping fall on the mounting frame (11). At this time, generate negative pressure inside the suction port (25) by using the suction pump (27) inside the suction frame (21) in cooperation with the guide pipe (26), so as to suck away the fine waste chips on the mounting frame (11). Then, send the waste chips into the waste material cavity (22) through the suction pump (27). Step 4: After the material clamping frame (12) drives the outer wheel of the hub bearing to complete the drilling and tapping processing, drive the mounting frame (11) to displace to one side of the chip removal frame (9) by moving the workbench (6). At this time, drive the movable baffle (24) to move upward through the driving end of the third servo cylinder (28), so that one end of the discharge pipe (29) is inserted into the waste material cavity (22). Use the discharge pipe (29) in cooperation with the chip removal frame (9) to extract the waste chips inside the waste material cavity (22), realizing the automatic cleaning of the waste inside the waste material cavity (22).

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