Automobile hub drilling device

Abstract

The invention relates to the technical field of hub machining, in particular to an automobile hub drilling device which comprises a bottom frame fixedly connected with a bottom plate, and a fixing piece used for fixing a hub body is installed on the bottom frame. An inserting groove is formed in the bottom frame, an inserting frame is inserted into the inserting groove, an electric push rod I is fixedly connected between the inserting frame and the bottom frame, a motor II is installed on the inserting frame, an output shaft of the motor II is connected with a drill bit through a coupler, a square rod is installed on the bottom plate, and a tray used for bearing the punching portion of a hub body is fixedly connected to the square rod. A plurality of grooves consistent with the drill bit in diameter are formed in the tray in a surrounding manner. The hub punching device has the beneficial effects that a punching part can be supported and supported, vertically downward impact force and cutting force generated during punching can be effectively dispersed, and the stability of the overall structure of a hub body is kept in the punching process.

Description

Technical Field

[0001] The invention relates to the technical field of wheel hub processing, and more particularly to a vehicle wheel hub drilling device. Background Art

[0002] In the process of automobile wheel hub processing, drilling is a key process. Existing drilling machines generally have poor working performance when processing automobile wheel hubs. For example, during the drilling process, traditional drilling machines have a relatively simple way of fixing automobile wheel hubs, and it is often difficult to accurately support and support the drilling parts. This causes the wheel hub to shake or shift easily during drilling, which in turn affects the accuracy and quality of the drilling. Taking some simple drilling machine tools as an example, they only fix the wheel hub with a simple clamp, and cannot be flexibly adjusted according to the shape of the wheel hub and the drilling position, which makes the wheel hub less stable during the drilling process, prone to drilling deviations, and increases the scrap rate. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a topic, and the technical problem solved is to be able to support and support the punching part to avoid aperture deviation or ellipticalization.

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

[0005] A vehicle wheel hub drilling device comprises a base frame fixedly connected to a bottom plate, a fixing piece for fixing a wheel hub body is installed on the base frame; a slot is provided on the base frame, a plug-in frame is inserted into the slot, an electric push rod I is fixedly connected between the plug-in frame and the base frame, a motor II is installed on the plug-in frame, an output shaft of the motor II is connected to a drill bit through a coupling, a square rod is installed on the base plate, a tray for supporting a hole punching part of the wheel hub body is fixedly connected to the square rod, and a plurality of grooves having the same diameter as the drill bit are arranged around the tray.

[0006] A conical surface I is fixedly connected to the drill bit, and the cross-sectional radius of the conical surface I decreases from an end away from the hub body to an end close to the hub body.

[0007] A sliding column is slidably connected in each of the grooves, a spring is placed between the sliding column and the bottom surface of the groove, and a conical surface II is formed on the upper end of the sliding column.

[0008] A cross cutter tip is fixedly connected to the lower end of the drill bit, and a cross groove matching the cross cutter tip is formed at the upper end of the sliding column.

[0009] The upper end of each groove is fixedly connected with a limiting ring for limiting the cone surface II.

[0010] The beneficial effects are:

[0011] The tray located at the lower end of the wheel hub body supports and holds the punching part, which can effectively disperse the vertical downward impact force and cutting force generated during punching, so that the wheel hub body maintains the stability of the overall structure during the punching process, reduces internal damage caused by external forces, and ensures that the wheel hub body can still maintain its original mechanical properties and load-bearing capacity in subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0013] Figure 1 It is a structural schematic diagram of an automobile wheel hub drilling device installed with a wheel hub body;

[0014] Figure 2 It is a structural schematic diagram of a vehicle wheel hub drilling device;

[0015] Figure 3 is a schematic diagram of the structure of the fixing parts on the bottom plate;

[0016] Figure 4 is a schematic diagram of the structure of the support plate;

[0017] Figure 5 It is a schematic diagram of the structure of the rack;

[0018] Figure 6 is a structural schematic diagram of a drill bit;

[0019] Figure 7 It is a partial cross-sectional structural schematic diagram of the assembly of the tray and the slide column;

[0020] Figure 8 is a schematic diagram of the structure of the sliding column;

[0021] Fig. 9 It is a schematic diagram of the structure of the hub body pressing the sliding post into the groove;

[0022] Fig.10 It is a schematic diagram of the structure when the cross tool tip is inserted into the cross slot;

[0023] Fig.11 It is a structural schematic diagram when the lower end of the hole is chamfered by the conical surface II;

[0024] Fig.12 is a structural schematic diagram of the bottom surface of the base plate;

[0025] Fig.13 It is a schematic diagram of the structure of the hole after the upper and lower points on the hub body are chamfered.

[0026] In the figure: base frame 101; slot 102; electric push rod I 103; bottom plate 104; bracket 105; plug rod 106; angle plate 107; square rod 201; electric push rod II 202; electric push rod III 203; support plate 204; hub body 205; tray 206; groove 207; limit ring 208; plug frame 301; motor I 302; rotating frame 303; motor II 304; drill bit 305; cross tip 306; cone I 307; grinding sheet 308; sliding column 401; spring 402; cone II 403; cross slot 404; inclined surface 405. DETAILED DESCRIPTION

[0027] like Figures 1 to 7 and 9:

[0028] A vehicle wheel hub drilling device, comprising a base frame 101 fixedly connected to a bottom plate 104, a fixing piece for fixing a wheel hub body 205 is installed on the base frame 101; a slot 102 is provided on the base frame 101, a plug-in frame 301 is inserted into the slot 102, an electric push rod I 103 is fixedly connected between the plug-in frame 301 and the base frame 101, a motor II 304 is installed on the plug-in frame 301, an output shaft of the motor II 304 is connected to a drill bit 305 through a coupling, a square rod 201 is installed on the bottom plate 104, a tray 206 for supporting the punching part of the wheel hub body 205 is fixedly connected to the square rod 201;

[0029] The hub body 205 is placed on the bottom plate 104 and fixed by the fixing parts. At this time, the tray 206 is attached to the bottom surface of the middle part of the hub body 205 to support and hold the part to be punched. The electric push rod Ⅰ103 is started to retract the telescopic end to drive the rack 301 to move towards the direction close to the hub body 205. The motor Ⅱ304 starts the drill bit 305 to rotate. The drill bit 305 moves downward and rotates at high speed to perform a drilling operation on the hub body 205.

[0030] During the drilling process, the tray 206 located at the lower end of the hub body 205 supports and supports the drilling area. Fig. 9 As shown, the vertical downward impact force and cutting force generated during drilling can be effectively dispersed, so that the hub body 205 maintains the stability of the overall structure during the drilling process, reduces internal damage caused by external forces, and ensures that the hub body 205 can still maintain its original mechanical properties and bearing capacity in subsequent use. Compared with traditional drilling devices, the drilling part lacks support. At the moment the drill bit cuts in, the material will produce local stress concentration due to uneven force, which will lead to tiny cracks or deformation in the area around the hole. Secondly, when the drilling part is in an unsupported state, the hub body 205 is prone to elastic deformation during the drilling process. This deformation will directly affect the feed direction and positioning accuracy of the drill bit, resulting in problems such as hole position deviation, hole diameter enlargement or irregular hole shape.

[0031] Therefore, the tray 206 provides a stable reference surface for the hub body 205, limiting its displacement and deformation during the drilling process, allowing the drill bit to perform precise cutting according to the preset trajectory and parameters, thereby significantly improving the dimensional accuracy, shape accuracy and position accuracy of the drilling, and ensuring the consistency and reliability of the drilling quality.

[0032] Furthermore, the tray 206 effectively prevents the hub body 205 from being partially sunken or warped by offsetting the axial force generated when the drill bit 305 is pressed down. Especially for ductile materials such as aluminum alloy, the support of the tray 206 can maintain the stability of the material around the hole, avoid hole diameter deviation or ovalization, and ensure that the hole size strictly meets the design requirements.

[0033] On this basis, a plurality of grooves 207 having the same diameter as the drill bit 305 are formed around the tray 206 .

[0034] The groove 207 provides a clear guide path for the drill bit 305, ensuring that the drill bit always drills vertically in the predetermined direction when drilling, avoiding hole position deviation or hole diameter expansion caused by the drill bit swing. The support of the tray 206 limits the slight displacement of the hub body 205 during drilling, and the restraining effect of the groove 207 on the drill bit 305 significantly reduces the cutting vibration, thereby reducing tool jitter, improving cutting efficiency, and extending tool life, reducing the risk of equipment failure caused by vibration.

[0035] When there is no support under the wheel hub, the cutting force is unevenly distributed, which easily causes excessive force on the tool, accelerating the wear and damage of the tool. The support tray 206 balances the cutting force, makes the drill bit 305 more evenly stressed, reduces the local stress concentration of the drill bit 305, and helps to extend the service life of the drill bit 305.

[0036] like Figure 6 , 10 and 11:

[0037] The drill bit 305 is fixedly connected with a conical surface I 307 , and the cross-sectional radius of the conical surface I 307 decreases from the end away from the hub body 205 to the end close to the hub body 205 ;

[0038] The high-speed rotating drill bit 305 drives the cone surface I 307 to rotate synchronously. While the drill bit 305 is drilling, the cone surface I 307 with decreasing radius from top to bottom contacts the upper end of the hole and automatically chamfers the upper end of the hole. The cone surface I 307 set on the drill bit 305 allows the two processes of drilling and chamfering to be completed at the same time, avoiding the cumbersome operation of step-by-step processing in traditional processes, and greatly shortening the processing time. Drilling and chamfering can be completed without changing the tool, reducing the tool change time and improving the utilization rate of the machine tool. Chamfering and drilling are completed simultaneously, and the same tool completes the two processes. The relative position accuracy of the hole and the chamfer is higher, ensuring the dimensional accuracy and shape accuracy of the hole mouth, and avoiding the errors that may be caused by secondary processing.

[0039] Furthermore, chamfering the hole can improve the fatigue strength of the parts, especially under high stress or alternating load conditions. Chamfering can effectively remove burrs from the hole, make the hole edge smoother, and make it easier to insert parts such as bolts and shafts into the hole.

[0040] like Figures 7 to 11 and 13:

[0041] A sliding post 401 is slidably connected in each of the grooves 207, a spring 402 is placed between the sliding post 401 and the bottom surface of the groove 207, and a conical surface II 403 is formed on the upper end of the sliding post 401;

[0042] Under normal conditions, the spring 402 gives the slide post 401 an upward thrust, so that the conical surface II 403 protrudes from the top surface of the tray 206. When the hub body 205 is fixed, the hub body 205 fits on the top surface of the tray 206, and the slide post 401 is pressed into the groove 207 under the gravity of the hub body 205. Fig. 9 As shown, at this time, the spring 402 is compressed, and the sliding column 401 elastically presses against the hub body 205. When the drill bit 305 drills downward and passes through the hub body 205, the lower end of the drill bit 305 will be inserted into the sliding column 401 and drive the sliding column 401 to rotate synchronously. Then, when the drill bit 305 moves upward, the spring 402 will give the sliding column 401 an upward thrust, so that the sliding column 401 moves upward synchronously with the drill bit 305, and then, driven by the drill bit 305, the sliding column 401 pushed upward rotates synchronously with the drill bit 305, and the conical surface II 403 that rotates synchronously with the sliding column 401 contacts and grinds the lower end of the hole drilled on the hub body 205, thereby chamfering the lower end of the hole drilled on the support plate 204, until the lower end of the drill bit 305 is separated from the sliding column 401, and the sliding column 401 stops rotating.

[0043] Thus, when the drill bit 305 drills downward in one direction, the cone surface I 307 and the cone surface II 403 are used to synchronously chamfer and remove burrs on both sides of the drilled hole, such as Fig.13 As shown in the figure, chamfering can eliminate the sharp edge of the hole, avoid jamming or interference with bolts, bearings and other mating parts, and make the assembly process smoother. After synchronous chamfering, no additional chamfering is required, which reduces subsequent processes and simplifies the production process. Chamfering also makes the stress distribution of the hole more uniform, avoiding plastic deformation or fracture caused by excessive local stress.

[0044] like Figures 8 to 11 As shown:

[0045] A cross tip 306 is fixedly connected to the lower end of the drill bit 305, and a cross groove 404 adapted to the cross tip 306 is formed at the upper end of the slide column 401;

[0046] After the drill bit 305 drills downward and drives the cross blade tip 306 to pass through the hub body 205, the cross blade tip 306 will be inserted into the cross groove 404. The cooperation between the cross blade tip 306 and the cross groove 404 drives the sliding column 401 to rotate synchronously. At this time, the sliding column 401 is elastically pressed against the cross blade tip 306 under the elastic force of the spring 402. Since the spring 402 is placed between the sliding column 401 and the bottom surface of the groove 207, it will not interfere with the rotation of the sliding column 401. When the drilling is completed and the control bracket 301 drives the rotating drill bit 305 to move upward, the spring 402 continuously gives the slide column 401 an upward thrust, so that the slide column 401 moves upward synchronously with the drill bit 305, and the slide column 401 pushed upward rotates synchronously with the drill bit 305, so that the rotating cone surface II 403 can grind and chamfer the lower end of the hole until the upward moving cross tip 306 is completely separated from the cross groove 404, the slide column 401 stops rotating, and after the drill bit 305 is pulled out of the drilled hole, the drilling is completed and the upper and lower sides of the hole are chamfered at the same time.

[0047] like Figure 7 As shown:

[0048] The upper end of each groove 207 is fixedly connected with a limiting ring 208 for limiting the conical surface II 403;

[0049] The spring 402 gives the slide post 401 an upward thrust, and the stop ring 208 limits the slide post 401 by contacting the conical surface II 403, thereby preventing the slide post 401 from being separated from the groove 207. Secondly, when the rotating slide post 401 moves upward following the drill bit 305, the conical surface II 403 contacts the stop ring 208 and stops moving upward, thus avoiding the operation of excessive chamfering.

[0050] like Figure 6 and 10 As shown:

[0051] A grinding disc 308 is fixedly connected to the upper end of the cone surface Ⅰ 307 on the drill bit 305; the drill bit 305 drives the grinding disc 308 to rotate synchronously, thereby further grinding the burrs protruding from the surface of the hub body 205, further making the edge of the hole smoother, reducing the risk of scratches on the operator when installing bolts, and improving the safety of the working environment.

[0052] like Figure 5 As shown:

[0053] The plug frame 301 is fixedly connected with a motor I 302, the output shaft of the motor I 302 is fixedly connected with a rotating frame 303, and the motor II 304 is fixedly connected with the rotating frame 303;

[0054] The motor I 302 is started to drive the rotating frame 303 to rotate, and the rotating frame 303 drives the drill bit 305 to make a circular motion, so as to drill a plurality of holes on the hub body 205 according to the requirements.

[0055] like Figure 8 As shown:

[0056] Each sharp corner inside the cross groove 404 is formed with an inclined surface 405;

[0057] Since the slide post 401 is in a rotatable state in the groove 207, when the cross blade tip 306 contacts the inclined surface 405, the inclined surface 405 can guide the cross blade tip 306 moving downward, so that the cross blade tip 306 can be quickly and smoothly inserted into the cross groove 404 and drive the slide post 401 to rotate synchronously.

[0058] like Fig.12 As shown:

[0059] The square rod 201 is slidably connected to the bottom plate 104, and two electric push rods II 202 are symmetrically fixed between the bottom surface of the bottom plate 104 and the square rod 201;

[0060] The two electric push rods II 202 are started to drive the square rod 201 to move up and down, thereby adjusting the height of the tray 206, so that it is suitable for supporting the punching parts of the hub body 205 of different sizes. Therefore, the tray 206 has good adaptability and flexibility and can be adjusted according to different working conditions and needs.

[0061] like Figures 3 to 4 As shown:

[0062] The fixing member includes a plurality of brackets 105 fixedly connected to the bottom plate 104, each bracket 105 is inserted with a plug rod 106, and the inner side of each plug rod 106 is fixedly connected with an angle plate 107, and the angle plate 107 is fixed to the bracket 105 by screws;

[0063] After placing the hub body 205 on the base plate 104, the sliding rod 106 drives the angle plate 107 to press against the hub body 205, and the screws on the bracket 105 are tightened to fix the position of the rod 106. The horizontal plates of the multiple angle plates 107 cooperate together to limit the hub body 205 in the vertical direction, and the vertical plates of the multiple angle plates 107 cooperate together to limit the hub body 205 in the horizontal reverse direction.

[0064] Further:

[0065] A plurality of electric push rods III 203 are fixedly connected around the square rod 201, and a support plate 204 is fixedly connected to the telescopic end of each electric push rod III 203;

[0066] After the hub body 205 is buckled on the bottom plate 104, the multiple electric push rods III 203 are controlled to start and drive the support plate 204 to extend and press against the arc-shaped inner wall of the hub body 205 from the inside, and further limit the hub body 205 in the circumferential direction from the inside, thereby increasing the stability of the hub body 205. Multiple extendable support plates 204 can adapt to hubs of different sizes.

[0067] During the drilling process, waste chips will continue to accumulate in the hole. If they are not removed in time, when the drill bit 305 continues to feed, the waste chips will squeeze the hole wall and deform it. In the drilling scenario, this will cause the hole diameter to become locally larger, causing the actual size of the hole to deviate from the designed size, and it is impossible to meet the processing requirements of high-precision holes. Therefore, a spiral chip groove is provided on the drill bit 305, and the spiral chip groove passes through the conical surface I 307 and the grinding sheet 308, so that continuous strips of cutting chips can be discharged along the spiral chip groove.

[0068] For fine granular chips, the core of the slide column 401 is provided with a vertical through hole, and the tray 206 located at the lower part of the slide column 401 is provided with a chip discharge port, and the chip discharge port is connected to an air extraction and chip discharge mechanism, so that the fine granular chips are sucked out by air extraction under the cooperation of air flow and gravity. This prevents the accumulated chips from rotating with the drill bit, leaving irregular marks on the hole wall, and seriously affecting the surface quality of the hole. Timely removal of waste chips can effectively reduce the formation of accumulated chips and ensure the flatness and smoothness of the hole wall surface.

[0069] Furthermore, for the fine granular chips, some will fall on the cone surface II 403. Since the cone surface II 403 is a conical surface, the chips are easy to accumulate. Therefore, a circle of chip removal grooves is set at the matching position of the tray 206 and the cone surface II 403. The chip removal grooves are connected with the chip removal port on the tray 206, so that the chips are removed by exhausting air through an exhaust chip removal mechanism.

[0070] The vacuum chip removal mechanism includes an air pump, an air pipe, a waste chip storage box and a filter. The waste chip inlet of the waste chip storage box is connected to the air pipe, and the other end of the air pipe is connected to the chip removal port of the tray 206. The gas outlet of the waste chip storage box is connected to the vacuum pump. A filter is arranged between the vacuum pump and the gas outlet of the waste chip storage box. The filter further prevents the waste chips from being sucked into the vacuum pump. The waste chip inlet and the gas outlet of the waste chip storage box are arranged on both sides of the upper end of the waste chip storage box, so as to prevent the waste chips from being sucked into the vacuum pump. While vacuuming the chips to discharge them, it also accelerates the gas flow, thereby cooling the high temperature generated by drilling.

Claims

1. A vehicle wheel hub drilling device, characterized in that: It comprises a base frame fixedly connected to a bottom plate, on which a fixing part for fixing a hub body is installed; a slot is provided on the base frame, in which a plug-in frame is inserted, an electric push rod I is fixedly connected between the plug-in frame and the base frame, a motor II is installed on the plug-in frame, an output shaft of the motor II is connected to a drill bit through a coupling, a square rod is installed on the base plate, a tray for supporting the punching part of the hub body is fixedly connected to the square rod, and a plurality of grooves having the same diameter as the drill bit are arranged around the tray.

2. The automobile wheel hub drilling device according to claim 1, characterized in that: A cone surface I is fixedly connected to the drill bit, and the cross-sectional radius of the cone surface I decreases gradually from an end away from the hub body to an end close to the hub body.

3. The automobile wheel hub drilling device according to claim 2, characterized in that: A sliding column is slidably connected in each groove, a spring is placed between the sliding column and the bottom surface of the groove, and a conical surface II is formed on the upper end of the sliding column.

4. The automobile wheel hub drilling device according to claim 3, characterized in that: The lower end of the drill bit is fixedly connected with a cross cutter tip, and the upper end of the sliding column is provided with a cross groove matched with the cross cutter tip.

5. The automobile wheel hub drilling device according to claim 4, characterized in that: The upper end of each groove is fixedly connected with a limiting ring for limiting the cone surface II.

6. The automobile wheel hub drilling device according to claim 2, characterized in that: A grinding sheet is fixedly connected to the upper end of the drill bit located on the conical surface I.

7. The automobile wheel hub drilling device according to claim 1, characterized in that: The plug-in frame is fixedly connected with a motor I, the output shaft of the motor I is fixedly connected with a rotating frame, and the motor II is fixedly connected with the rotating frame.

8. The automobile wheel hub drilling device according to claim 4, characterized in that: Each sharp corner on the inner side of the cross slot is formed with a chamfer.

9. The automobile wheel hub drilling device according to claim 1, characterized in that: The square rod is slidably connected to the bottom plate, and two electric push rods II are symmetrically fixed between the bottom surface of the bottom plate and the square rod.

10. The automobile wheel hub drilling device according to claim 9, characterized in that: The fixing member comprises a plurality of brackets fixedly connected to the bottom plate, each bracket is inserted with an insertion rod, the inner side of each insertion rod is fixed with an angle plate, and the angle plate and the bracket are locked and fixed by screws.

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