A tapping machine, a hub inclined hole machining device, a hub machining production line and a hub machining method

Abstract

The application provides a tapping machine, a hub inclined hole processing equipment, a hub processing production line and a hub processing method, and relates to the technical field of machining. The application solves the problems of short service life and unstable processing of the existing tapping machine and hub inclined hole processing equipment. The application comprises a rack, the rack is sequentially arranged with a drilling machine, a counterboring machine and the tapping machine in the horizontal direction, a sliding table is arranged on one side of the rack along the distribution path of the drilling machine, the counterboring machine and the tapping machine, and the sliding table is used for fixing a hub positioning seat. The processing equipment of the application integrates the drilling machine, the counterboring machine and the tapping machine, corresponds to three processes of drilling, counterboring and tapping, and cooperates with the sliding table which can sequentially transfer the workpiece to the below of the three workstations for processing, so that the hub can be automatically processed, and the processing is stable and efficient.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and to a tapping machine, and more particularly to a tapping machine, wheel hub oblique hole machining equipment, wheel hub machining production line, and wheel hub machining method. Background Technology

[0002] Existing wheel hub beveling equipment typically integrates a drilling machine, a countersinking machine, and a tapping machine, corresponding to the three processing steps of drilling, countersinking, and tapping. By passing the wheel hub sequentially through this equipment, threaded beveling holes can be machined on the wheel hub in a single operation, eliminating the need to move the wheel hub back and forth between individual machines and thus increasing the efficiency of beveling. Most existing wheel hub beveling equipment is semi-automatic, simply combining conventional drilling, countersinking, and tapping machines. A slide table is installed on the machine to transport the wheel hub to each workstation for processing. In actual processing, workers need to operate each machine, for example, pulling down the handle to lower the cutting tools on the drilling, countersinking, and tapping machines for processing, and then pulling back the handle to retract the cutting tools after processing.

[0003] With the advancement of technology, our company later made corresponding improvements to such equipment. By modifying the handles of drilling machines, counterboring machines, and tapping machines, we removed the handles and replaced them with motor-driven structures. The basic principle is to connect the motor to the feed gear shaft on the machine head through a coupling, and directly control the rotation of the servo motor to drive the cutting tools on the drilling machine, counterboring machine, or tapping machine to move up and down for feeding, thus achieving fully automatic processing.

[0004] However, through continuous practice, our company has found that this structure still has significant problems, as follows: 1. The motor directly drives the feed gear shaft to drive the tool to make hard contact with the workpiece (i.e., the hub) at a constant speed. At the moment of contact, the tool may be damaged (the tool is also prone to wear or even damage under long-term hard contact impact); 2. When drilling, counterboring, or tapping is finished, the tool will reverse under the control of the host machine and then exit the machined hole. At the same time, the servo motor that controls the up and down movement of the tool needs to reverse at the same time and exit upward. If there is a lack of coordination between the two or a drive failure in one part, the tool will be damaged. This situation is especially common on tapping machines. When the tapping tool is retracted, it exits by freely rotating along the machined internal thread. At the same time, if the drive motor is not driven in time or does not drive, the reverse-rotating tapping tool will at least damage the machined internal thread, or at worst, directly destroy the tool. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a tapping machine, a wheel hub oblique hole machining equipment, a wheel hub machining production line, and a wheel hub machining method. The technical problem it aims to solve is the short lifespan and unstable machining performance of existing tapping machines and wheel hub oblique hole machining equipment.

[0006] The objective of this invention can be achieved through the following technical solutions: A tapping machine includes a head, the head having a feed gear shaft for driving a cutting tool to move vertically. The head is characterized by a drive assembly fixedly mounted on the head for driving the feed gear shaft to rotate. A dial disc is coaxially fixed on the feed gear shaft, and a first dial block protrudes from the first dial disc. The drive assembly has a second dial disc capable of circumferential rotation. The second dial disc is coaxially mounted with the first dial disc and has a second dial block protruding from it, capable of resisting the first dial block in the circumferential direction. The first and second dial blocks are relatively separable and rotate, and an elastic buffer is provided between the first and second dial blocks to reduce the impact of the cutting tool contacting the workpiece.

[0007] The tapping machine has a feed gear shaft on its head similar to that of a conventional tapping machine. The cutting tool is driven to move downward by the rotation of the feed gear shaft. The tapping machine has a drive assembly on its head for driving the feed gear shaft to rotate.

[0008] The drive assembly and feed gear shaft of this application are connected and transmitted via dial one and dial two. Dial one has a protruding lever, and dial two has a protruding lever. When dial two rotates, it drives lever two to engage with lever one, thereby driving dial one to rotate, which in turn drives the feed gear shaft to rotate. An elastic buffer is installed between lever one and lever two. In the initial operation, the tool and the workpiece have a certain contact distance. At this contact distance, dial two drives lever two to move closer to lever one for transmission. Due to the elastic force of the elastic buffer, lever one and lever two can transmit power without touching. At this time, the tool moves downward. When the tool contacts the workpiece, the torque between lever one and lever two increases, causing the elastic buffer to be compressed. Lever one and lever two move closer to each other to achieve buffering. During this process, the contact force between the tool and the workpiece gradually increases, thereby avoiding damage from hard contact of the tool. This buffering process improves the service life of the tool and also enhances the stability during machining. When the elastic buffer is compressed to its limit or set position, the tool also presses down on the workpiece with constant pressure to tap the thread. After tapping a certain distance, as long as the drill bit rotates actively, it can tap the thread autonomously under the drive of the thread. The above design allows for a certain buffer time when the tool contacts the workpiece. In fact, the force when the tool contacts the workpiece gradually increases until it reaches its maximum as the elastic buffer is continuously compressed. This tapping process is gentle and stable, which can effectively protect the tool from wear or damage due to hard contact, thereby greatly improving the service life and operational stability of the overall tapping machine.

[0009] Another advantage of the drive assembly and feed gear shaft connected by dial one and dial two is that dial one and dial two can rotate relatively separately. After the tool enters the hole to be machined, dial two can stop rotating and rotate in the opposite direction to reset. At this time, dial one is still rotating forward under the passive drive of the tool. When the tapping is finished, when the tool retracts, the dial one and dial two are separated from each other due to their opposite rotation during the tapping process. Thus, the transmission of dial one and dial two is separated. In this way, the reverse rotation of the tool can be used to freely retract upward using the internal thread of the tap. During the retraction process, it drives dial one to rotate in the opposite direction. Since dial two is reset in advance, dial one is not interfered with by dial two during the reset process and can reset independently. This tool retraction process can effectively avoid hard friction between the tool and the internal thread of the tap due to interference from the drive assembly, and can effectively avoid tool wear or even damage. This design further improves the service life and operational stability of the overall machine.

[0010] In the aforementioned tapping machine, the first tap protrudes from the end face of the first tap facing the second tap, and the second tap protrudes from the end face of the second tap facing the first tap. The first and second taps are adjacent and spaced apart in the circumferential direction, and the elastic force of the elastic buffer can act on the adjacent sides of the first and second taps.

[0011] In this application, the first and second dial blocks are adjacent and spaced apart in the circumferential direction. When the second dial block rotates in one direction, it can drive the second dial block to approach the first dial block to compress the elastic buffer to achieve elastic drive. When the first and second dial blocks move in opposite directions, the elastic buffer cannot transmit power to achieve power isolation. This design can achieve both buffered contact and slow pressure between the tool and the workpiece during tapping, and free rotation of the feed gear shaft during tool retraction. This design further improves the overall service life and operational stability of the machine.

[0012] In the aforementioned tapping machine, the elastic buffer is a hydraulic buffer. The second dial has a through hole on its side, and the elastic buffer is embedded in the through hole with its buffer end facing the side of the first dial. When the second dial rotates, the buffer end of the elastic buffer can press against the side of the first dial to form a buffer.

[0013] The hydraulic damper is directly embedded in the through hole. This installation method can effectively distribute the elastic force to the two adjacent levers, lever one and lever two, which can better buffer the force and further improve the overall stability.

[0014] In the aforementioned tapping machine, the elastic buffer is a spring. The opposing sides of the push block one and push block two are provided with receiving groove one and receiving groove two, respectively. The two ends of the spring are respectively embedded in receiving groove one and receiving groove two. When push block one and push block two approach each other, they can compress the spring to form a buffer.

[0015] This is another embodiment of the elastic buffer of this application. In this embodiment, the elastic buffer is a spring. The two ends of the spring are respectively connected to the receiving groove 1 and receiving groove 2 on two adjacent levers 1 and 2. When levers 1 and 2 approach each other, the spring can be compressed to achieve the buffering effect. This design can achieve the same technical effect as the above solution.

[0016] In the aforementioned tapping machine, the drive assembly further includes a cylinder, a gear, and a rack. A sleeve seat is fitted on the outer side of the first dial on the machine head. A circumferentially rotatable positioning shaft is axially fixed inside the sleeve seat. The positioning shaft is coaxially arranged with the feed gear shaft. The second dial is located inside the sleeve seat and fixed to the end of the positioning shaft. The gear is fixed to the other end of the positioning shaft. The cylinder is fixed on the machine head, and the rack is connected to the cylinder's push rod. The rack is driven by the cylinder to reciprocate in a single direction. The gear meshes with the rack and is driven to rotate by the rack.

[0017] The drive assembly of this application uses a cylinder drive. A rack is installed on the cylinder push rod, and a gear is coaxially connected to the dial two for transmission. The cylinder pushes the rack to move back and forth in a fixed direction. The rack meshes with the gear to convert linear motion into gear rotational motion. The advantage of this design is that the cylinder drive stroke is controllable and stable, and the range of extension and retraction is constant each time. The precision of controlling the linear motion to gear rotation is also very high, which enables the tool to descend stably to contact the workpiece and reset. This design further improves the overall service life and operational stability of the machine.

[0018] In the aforementioned tapping machine, a mounting base is fixed on the machine head, a linear guide rail is laid on the mounting base, the rack is fixed on the slider of the linear guide rail, and the cylinder is fixed on the mounting base and can push the rack to reciprocate along the arrangement direction of the linear guide rail. The linear guide rails are arranged perpendicular to the orientation of the positioning shaft. The slider on the linear guide rail is fixed to the side of the rack, and the bottom of the rack has teeth that mesh with the gear.

[0019] The rack in this application is connected to the mounting base via a linear guide rail, and then guided to slide along the linear guide rail by a cylinder. This design makes the overall structure operate more stably and smoothly.

[0020] In particular, the slider on the linear guide of this application is fixed to the side of the rack, and the teeth of the rack are at the bottom of the rack. In this way, the slider can provide lateral support to the rack in the front-back direction to prevent the rack from disengaging from the gear laterally and increase stability.

[0021] In the aforementioned tapping machine, the drive assembly further includes a servo motor, which is fixed on the side of the machine head. A drive gear is fixed on the output shaft of the servo motor, and a driven gear is coaxially connected to the dial two. The drive gear and the driven gear mesh and transmit power.

[0022] This is another implementation of the drive component of this application. In this implementation, the drive component drives the active gear to rotate via a servo motor. The active gear transmits power by meshing with the driven gear. This design can achieve a similar technical effect to the above-mentioned solution.

[0023] In the aforementioned tapping machine, a cutting tool and a cutting tool shaft that drives the cutting tool to rotate are mounted on the machine head. The cutting tool shaft can move vertically, and an elastic reset member is press-fitted onto the upper end of the cutting tool shaft to keep the cutting tool shaft always moving upward.

[0024] The machine head of this application is equipped with an elastic reset component. The elasticity of the elastic reset component acts on the tool shaft connected to the tool, which enables the tool to maintain an upward movement trend. During the retraction process, the tool can move upward along the internal thread, and the elastic force of the elastic reset component can better enable the tool to overcome its own gravity and rotate freely upward, further improving the overall service life and operational stability.

[0025] A wheel hub oblique hole processing equipment includes a frame, characterized in that a drilling machine, a countersinking machine and a tapping machine are arranged sequentially along the horizontal direction on the frame, and a slide is arranged on one side of the distribution path of the drilling machine, the countersinking machine and the tapping machine on the frame, the slide being used to fix the wheel hub positioning seat.

[0026] The processing equipment of this application integrates a drilling machine, a countersinking machine, and a tapping machine, corresponding to the three processes of drilling, countersinking, and tapping. Combined with a slide table that can sequentially move the workpiece to the bottom of the above three workstations for processing, it can process wheel hubs in a fully automatic, stable and efficient manner.

[0027] In the above-mentioned wheel hub inclined hole processing equipment, the drilling machine and the counterboring machine are respectively equipped with a gear shaft one and a gear shaft two, the input ends of the gear shaft one and the gear shaft two are connected to flexible couplings, and the drilling machine and the counterboring machine are each equipped with a motor that can drive their respective flexible couplings to rotate. An electric cylinder is installed on one side of the frame along the distribution path of the drilling machine, counterboring machine, and tapping machine. The slide is connected to the electric cylinder and is driven by the electric cylinder to move back and forth along the distribution path of the drilling machine, counterboring machine, and tapping machine. The electric cylinder includes a drive motor, a lead screw, and a slider. The electric cylinder also includes a guide mating platform. The drive motor and the lead screw are both installed on the guide mating platform. The slider can be guided to move along the length direction of the guide mating platform. The sliders are connected to each other through a connector and move synchronously. The slide table is attached to the upper surface of the guide mating platform and can be guided to move along the length direction of the upper surface of the guide mating platform. The upper surface of the guide mating platform is provided with several evenly spaced toothed grooves along its length direction. Each toothed groove is arranged along the width direction of the guide mating platform, and there is a guide plane between two adjacent toothed grooves that contacts the bottom surface of the slide.

[0028] The inclined hole machining equipment of this application switches between three workstations by moving a slide table, and machining needs to be performed directly at the workstation. The stability of the landing point after the slide table moves needs to be guaranteed. This application further designs a guide mating platform on the conventional electric cylinder. The entire slide table moves against the guide mating platform. When it moves to the workstation, it is very stable because the entire slide table is located on the guide mating platform, and drilling, countersinking or tapping can be performed directly.

[0029] The present application has spaced toothed grooves on the guide mating platform, which can effectively reduce the friction between the slide and the guide mating platform when the slide moves, making the movement smoother. Moreover, after moving to the work station, the various guide planes can form a large plane to provide support, so that the slide can be stably supported. This design not only improves the service life and makes the operation stable, but also improves the machining accuracy.

[0030] A wheel hub processing production line is characterized by comprising an automatic pick-and-place robot, and a feeding roller conveyor, a chamfering processing device, a group drilling machine, and the aforementioned wheel hub inclined hole processing equipment arranged in sequence around the automatic pick-and-place robot.

[0031] In the aforementioned wheel hub processing production line, a first visual inspection mechanism is provided at the end of the feeding roller conveyor, and a second visual inspection mechanism is provided at the end of the chamfering processing device.

[0032] A wheel hub processing method, which utilizes the aforementioned wheel hub processing production line, is characterized by comprising the following steps: S1. Loading: Place the blank wheel hub at the loading roller conveyor and convey it to the vicinity of the automatic pick-and-place robot. S2, Visual image positioning: The blank wheel hub is photographed and uploaded by the first visual inspection mechanism (141) set at the end of the feeding roller conveyor, and the positioning is calculated by the system. S3, Group Drilling: The automatic pick-and-place robot arm grabs the blank wheel hub and transfers it to the group drilling machine for drilling. S4. Oblique hole processing: The blank wheel hub is picked up from the group drilling machine by an automatic pick-and-place robot and transferred to the wheel hub oblique hole processing equipment for oblique hole processing. S5. Chamfering: The blank wheel hub is picked up from the wheel hub oblique hole processing equipment by an automatic pick-and-place robot and transferred to the chamfering processing device for automatic chamfering. S6. Unloading: After the finished wheel hub is processed, it passes the second vision inspection mechanism at the chamfering processing device and is unloaded from the unloading roller conveyor.

[0033] Compared with existing technologies, the advantages of this product are: 1. When the tool contacts the workpiece, there is a certain buffer time. In fact, the force when the tool contacts the workpiece gradually increases until it reaches its maximum as the elastic buffer is continuously compressed. This tapping process is gentle and stable, which can protect the tool from wear or damage due to hard contact, thereby greatly improving the service life and operational stability of the overall tapping machine. 2. During the reset process, the first dial is not interfered with by the second dial and can reset independently. This tool retraction process can effectively avoid the hard friction between the tool and the tapping internal thread caused by the interference of the drive component, and can effectively avoid tool wear or even damage. This design further improves the service life and operational stability of the overall machine. 3. The drive assembly adopts cylinder drive, which pushes the rack to move back and forth in a fixed direction. The rack meshes with the gear to convert linear motion into gear rotational motion. This design makes the drive stroke controllable and stable, and the range of extension and retraction is constant each time. This allows the tool to descend stably to contact the workpiece and reset. This design further improves the overall service life and operational stability of the machine. Attached Figure Description

[0034] Figure 1 This is a side view of the tapping machine of the present invention; Figure 2 This is a schematic diagram of the structure of the driving component of the present invention; Figure 3 This is a partial structural schematic diagram of the driving component of the present invention; Figure 4 This is a partial structural schematic diagram of the driving component of the present invention; Figure 5 This is a schematic diagram of the wheel hub inclined hole processing equipment of the present invention; Figure 6 This is a partial structural schematic diagram of the wheel hub inclined hole processing equipment of the present invention; Figure 7 This is a schematic diagram of the wheel hub processing production line of the present invention; Figure 8 This is a flowchart of the wheel hub processing and production process according to the present invention.

[0035] In the diagram: 1. Machine head; 11. Feed gear shaft; 12. Dial 1; 121. Pulley 1; 13. Automatic loading and unloading robot; 14. Feeding roller conveyor; 141. First vision inspection mechanism; 15. Chamfering processing device; 151. Second vision inspection mechanism; 16. Special drilling machine; 2. Drive assembly; 21. Dial 2; 211. Pulley 2; 212. Through hole; 22. Cylinder; 23. Gear; 24. Rack; 2 5. Sleeve seat; 26. Positioning shaft; 27. Mounting seat; 28. Linear guide rail; 3. Elastic buffer; 4. Elastic reset component; 5. Tool shaft; 6. Drilling machine; 61. Gear shaft one; 62. Gear shaft two; 7. Counterboring machine; 8. Frame; 81. Electric cylinder; 82. Guide mating platform; 821. Gear groove; 822. Guide plane; 83. Connecting component; 9. Slide table; 10. Flexible coupling; 101. Servo motor. Detailed Implementation

[0036] Example

[0037] like Figure 5 and Figure 6 The diagram illustrates a wheel hub oblique hole machining device, comprising a frame 8. A drilling machine 6, a countersinking machine 7, and a tapping machine are arranged sequentially along the horizontal direction on the frame 8. A slide 9 is arranged on one side of the distribution path of the drilling machine 6, countersinking machine 7, and tapping machine, and the slide 9 is used to fix the wheel hub positioning seat. Existing conventional techniques for fixing wheel hub seats are not elaborated here; however, reference can be made to the wheel oil injection hole machining fixture in application number CN201920491446.7. This machining device integrates the drilling machine 6, countersinking machine 7, and tapping machine, corresponding to the drilling, countersinking, and tapping processes. Combined with the slide 9, which sequentially moves the workpiece below the three workstations for machining, this device enables fully automatic, stable, and efficient wheel hub machining.

[0038] The basic structure of the drilling machine 6 and the counterboring machine 7, which respectively have three machines with gear shaft 61 and gear shaft 62, is common knowledge to those skilled in the art and will not be elaborated upon here. Please refer to the content of patent CN203956147U. The innovation of this application lies in the following: the input ends of both gear shaft 61 and gear shaft 62 are connected to flexible couplings 10; both the drilling machine 6 and the counterboring machine 7 are equipped with motors 101 capable of driving the rotation of their respective flexible couplings 10; an electric cylinder 81 is installed on one side of the distribution path of the drilling machine 6, the counterboring machine 7, and the tapping machine on the frame 8; a slide 9 is connected to the electric cylinder 81 and is driven by the electric cylinder 81 to reciprocate along the distribution path of the drilling machine 6, the counterboring machine 7, and the tapping machine; the electric cylinder 81 includes a drive motor, a lead screw, and a slider; the electric cylinder 81 also includes a guide platform 82, a drive motor, and... All lead screws are installed at the guide mating platform 82. The slider can be guided to move along the length direction of the guide mating platform 82. The sliders are connected and move synchronously through the connector 83. The slide table 9 is attached to the upper surface of the guide mating platform 82 and can be guided to move along the length direction of the upper surface of the guide mating platform 82. The upper surface of the guide mating platform 82 is provided with a number of evenly spaced toothed grooves 821 along its length direction. Each toothed groove 821 is arranged along the width direction of the guide mating platform 82. There is a guide plane 822 between two adjacent toothed grooves 821 that contacts the bottom surface of the slide table 9. The inclined hole machining equipment of this application switches between three workstations by moving the slide table 9. Since machining is required directly at each workstation, the stability of the slide table 9's landing point after movement needs to be guaranteed. This application further designs a guide platform 82 on the conventional electric cylinder 81. The entire slide table 9 moves against the guide platform 82. When it reaches the workstation, the slide table 9 is very stable because it sits on the guide platform 82, allowing for direct drilling, countersinking, or tapping. The guide platform 82 of this application has spaced toothed grooves 821, which effectively reduces the friction between the slide table 9 and the guide platform 82 during movement, making its movement smoother. Furthermore, after reaching the workstation, the various guide planes 822 form a large flat surface for support, ensuring stable support for the slide table 9. This design improves service life, operational stability, and machining accuracy.

[0039] like Figures 1-4The specific structure of the tapping machine in the above-mentioned wheel hub inclined hole processing equipment is as follows: A tapping machine includes a head 1, a feed gear shaft 11 for driving the tool to move in the vertical direction on the head 1, a drive assembly 2 for driving the feed gear shaft 11 to rotate on the head 1, a dial 12 coaxially fixed on the feed gear shaft 11, a dial block 121 protruding on the dial 12, a dial 21 capable of circumferential rotation on the drive assembly 2, the dial 21 being coaxially arranged with the dial 12 and a dial block 211 protruding on the dial 21 capable of resisting the dial block 121 in the circumferential direction, the dial block 121 and the dial block 211 being relatively separable and rotating, and an elastic buffer 3 being provided between the dial block 121 and the dial block 211 to reduce the impact of the tool contacting the workpiece. The tapping machine head 1 has a feed gear shaft 11 similar to that of a conventional tapping machine. The feed gear shaft 11 rotates to drive the cutting tool downwards. The tapping machine head 1 is equipped with a drive assembly 2 for driving the feed gear shaft 11. The drive assembly 2 and the feed gear shaft 11 are connected and transmitted via a dial 12 and a dial 21. A dial 12 has a protruding dial block 121, and a dial 21 has a protruding dial block 211. When the dial 21 rotates, it drives the dial block 211 to engage with the dial block 121, thereby rotating the dial 12 and subsequently the feed gear shaft 11. An elastic buffer 3 is installed between the dial block 121 and the dial block 211. During initial operation, the cutting tool and the workpiece have a certain contact distance. At this contact distance, the dial 21 drives the dial block 211. 1. The transmission is performed close to the first shift block 121. Due to the elastic force of the elastic buffer 3, the first shift block 121 and the second shift block 211 can transmit without contacting each other. At this time, the tool moves downward. When the tool contacts the workpiece, the torque between the first shift block 121 and the second shift block 211 increases, which causes the elastic buffer 3 to be compressed. The first shift block 121 and the second shift block 211 move closer to each other to achieve buffering. During this process, the contact force between the tool and the workpiece gradually increases, thereby avoiding damage to the tool through hard contact. This buffering process improves the service life of the tool and also enhances the stability during machining. When the elastic buffer 3 is compressed to its limit or set position, the tool also presses down on the workpiece with constant pressure to tap the thread. After tapping a certain distance, as long as the drill bit rotates actively, it can tap the thread autonomously under the drive of the thread. The above design allows for a certain buffer time when the tool contacts the workpiece. In fact, the force when the tool contacts the workpiece gradually increases until it reaches its maximum as the elastic buffer 3 is continuously compressed. This tapping process is gentle and stable, which can effectively protect the tool from wear or damage due to hard contact, thereby greatly improving the service life and operational stability of the overall tapping machine.Another advantage of the drive assembly 2 and the feed gear shaft 11 connected by dial 12 and dial 21 is that dial 121 and dial 211 can rotate relatively separately. After the tool enters the hole to be machined, dial 21 can stop rotating and rotate in the opposite direction to reset. At this time, dial 12 is still rotating forward under the passive drive of the tool. When the tapping is completed and the tool is withdrawn, the dial 121 and dial 21 separate from each other due to their opposite rotation during the tapping process. The transmission of dial 12 and dial 21 is separated, so the tool can be freely withdrawn upward by rotating in the opposite direction using the internal thread of the tap. During the withdrawal process, the dial 12 rotates in the opposite direction. Since the dial 211 is reset in advance, the dial 12 is not interfered with by the dial 211 during the reset process and can be reset independently. This tool withdrawal process can effectively avoid the hard friction between the tool and the internal thread of the tap caused by the interference of the drive component 2, and can effectively avoid tool wear or even damage. This design further improves the service life and operational stability of the overall machine.

[0040] Furthermore, the first lever 121 protrudes from the end face of the first dial 12 facing the second dial 21 and is positioned near the outer edge of the end face. The second lever 211 protrudes from the end face of the second dial 21 facing the first dial 12 and is also positioned near the outer edge. The first lever 121 and the second lever 211 are adjacent to each other in the circumferential direction and are spaced apart. The elastic force of the elastic buffer 3 can act on the adjacent sides of the first lever 121 and the second lever 211. Preferably, the first lever 121 and the second lever 211 are arranged in pairs, and each first lever 121 has a corresponding second lever 211. In this application, the first dial block 121 and the second dial block 211 are adjacent and spaced apart in the circumferential direction. When the second dial block 21 rotates in one direction, it can drive the second dial block 211 to approach the first dial block 121 to compress the elastic buffer 3 to achieve elastic drive. When the first dial block 121 and the second dial block 211 move in opposite directions, the elastic buffer 3 cannot transmit power to achieve power isolation. This design can achieve both buffered contact and slow pressure between the tool and the workpiece during tapping, and free rotation of the feed gear shaft 11 during tool retraction. This design further improves the service life and operational stability of the overall machine.

[0041] Furthermore, the elastic buffer 3 is a hydraulic buffer. The second dial 211 has a through hole 212 on its side. The elastic buffer 3 is embedded in the through hole 212, with its buffer end facing the side of the first dial 121. When the second dial 21 rotates, the buffer end of the elastic buffer 3 can press against the side of the first dial 121 to form a buffer. The hydraulic buffer is directly embedded in the through hole 212. This installation method can effectively distribute the elastic force to the two adjacent dials 121 and 211, providing better buffering and further improving overall stability.

[0042] Furthermore, the drive assembly 2 also includes a cylinder 22, a gear 23, and a rack 24. A sleeve seat 25 is fitted on the outer side of the dial 12 on the head 1. A positioning shaft 26 capable of circumferential rotation is axially fixed inside the sleeve seat 25 and fixed to the head 1. The positioning shaft 26 is fixed to the outer end of the sleeve seat 25 by a bearing. The positioning shaft 26 is coaxially arranged with the feed gear shaft 11. The dial 21 is located inside the sleeve seat 25 and fixed to the end pin of the positioning shaft 26. The gear 23 is fixed to the other end of the positioning shaft 26. The cylinder 22 is fixed to the head 1, and the rack 24 is connected to the push rod of the cylinder 22. The rack 24 is driven by the cylinder 22 to reciprocate in one direction. The gear 23 meshes with the rack 24 and is driven to rotate by the rack 24. The drive assembly 2 of this application is driven by a cylinder 22. A rack 24 is mounted on the push rod of the cylinder 22, and a gear 23 is coaxially connected to the dial 21 for transmission. The cylinder 22 pushes the rack 24 to reciprocate in a fixed direction. The rack 24 meshes with the gear 23 to convert linear motion into rotational motion of the gear 23. The advantage of this design is that the drive stroke of the cylinder 22 is controllable and stable, and the range of extension and retraction is constant each time. The precision of converting linear motion into rotational control of the gear 23 is also very high, which enables the tool to descend stably to contact the workpiece and return to its original position. This design further improves the service life and operational stability of the overall machine.

[0043] Furthermore, a mounting base 27 is fixed on the machine head 1, and a linear guide rail 28 is laid on the mounting base 27. A rack 24 is fixed on the slider of the linear guide rail 28, and a cylinder 22 is fixed on the mounting base 27 and can push the rack 24 to reciprocate along the arrangement direction of the linear guide rail 28. The arrangement direction of the linear guide rail 28 is perpendicular to the orientation of the positioning shaft 26. The slider on the linear guide rail 28 is fixed on the side of the rack 24, and the bottom of the rack 24 has teeth that mesh with the gear 23. In this application, the rack 24 is connected to the mounting base 27 through the linear guide rail 28, and then driven by the cylinder 22 to slide along the arrangement direction of the linear guide rail 28. This design makes the overall structure operate more stably and smoothly. In particular, the slider on the linear guide 28 of this application is fixed on the side of the rack 24, and the teeth of the rack 24 are at the bottom of the rack 24. In this way, the slider can provide lateral support to the rack 24 in the front-back direction to prevent the rack 24 from disengaging from the gear 23 laterally, thereby increasing stability.

[0044] Furthermore, the machine head 1 is equipped with a cutting tool and a tool shaft 5 that drives the tool to rotate. The upper end of the tool shaft 5 protrudes from the machine head 1. A transmission disc is mounted on the tool shaft 5. A motor 101 is mounted on the other end of the machine head 1. The motor 101 is connected to the transmission disc via a belt. The transmission disc and the tool shaft 5 are circumferentially fixed but axially movable. The tool shaft 5 can move vertically, and an elastic reset member 4 is pressed onto the upper end of the tool shaft 5 to keep the tool shaft 5 always moving upward. Preferably, the elastic reset member 4 can be a compression spring. One end of the compression spring abuts against the end of the tool shaft 5, and the other end presses against the transmission disc or the outer shell of the machine head 1 for support. The machine head 1 of this application is equipped with an elastic reset member 4. The elasticity of the elastic reset member 4 acts on the tool shaft 5 connected to the tool, which keeps the tool moving upward. During the retraction process, the tool can move upward along the internal thread, and the elastic force of the elastic reset member 4 can better allow the tool to overcome its own gravity and rotate freely upward, further improving the overall service life and operational stability.

[0045] like Figure 7 The wheel hub processing production line shown includes an automatic pick-and-place robot 13, and a feeding roller conveyor 14, a chamfering processing device 15, a group drilling machine 16, and a wheel hub inclined hole processing equipment arranged in sequence around the automatic pick-and-place robot 13.

[0046] Furthermore, a first visual inspection mechanism 141 is provided at the end of the feeding roller conveyor 14, and a second visual inspection mechanism 151 is provided at the end of the chamfering processing device 15.

[0047] like Figure 8 The method for machining a wheel hub shown herein, which utilizes the aforementioned wheel hub machining production line, is characterized by comprising the following steps: S1. Loading: Place the blank wheel hub at the loading roller conveyor 14, and convey it through the loading roller conveyor 14 to the vicinity of the automatic pick-and-place robot 13. S2, Visual image positioning: The blank wheel hub is photographed and uploaded by the first visual inspection mechanism 141 set at the end of the feeding roller conveyor 14, and the positioning is calculated by the system. S3, Group drilling processing: The automatic pick-and-place robot arm 13 picks up the blank wheel hub and transfers it to the group drilling machine 16 for drilling processing. S4. Oblique hole processing: The automatic pick-and-place robot 13 picks up the blank wheel hub at the group drilling machine 16 and transfers it to the wheel hub oblique hole processing equipment for oblique hole processing. S5. Chamfering: The automatic pick-and-place robot arm 13 picks up the blank wheel hub from the wheel hub inclined hole processing equipment and transfers it to the chamfering processing device 15 for automatic chamfering. S6. Unloading: After processing, the finished wheel hub passes inspection by the second vision inspection mechanism 151 at the chamfering processing device 15 and is unloaded from the unloading roller conveyor. The unloading roller conveyor is located at the unloading port of the chamfering processing device 15, and the aforementioned second vision inspection mechanism 151 is also located above the unloading roller conveyor. After the chamfering processing device 15 completes processing, the finished wheel hub is flipped by an automatic flipping mechanism and transferred to the unloading roller conveyor for inspection. Example

[0048] This is another embodiment of the elastic buffer 3 of this application. In this embodiment, the other structures are basically the same as in Embodiment 1, except that the elastic buffer 3 is a spring. The opposing sides of the first and second paddle blocks 121 and 211 are provided with receiving groove 1 and receiving groove 2, respectively. The two ends of the spring are respectively embedded in receiving groove 1 and receiving groove 2. When the first and second paddle blocks 121 and 211 approach each other, they can compress the spring to form a buffer. The two ends of the spring are respectively connected to receiving groove 1 and receiving groove 2 on two adjacent first and second paddle blocks 121 and 211. When the first and second paddle blocks 121 and 211 approach each other, they can compress the spring to achieve a buffering effect. This design can achieve the same technical effect as the above solution. Example

[0049] This is another embodiment of the drive component 2 of this application. In this embodiment, the other structures are basically the same as in Embodiment 1, except that the drive component 2 also includes a servo motor 101. The servo motor 101 is fixed to the side of the head unit 1, and a drive gear 23 is fixed to the output shaft of the servo motor 101. A driven gear 23 is coaxially connected to the dial 21, and the drive gear 23 meshes with the driven gear 23 for transmission. In this embodiment, the drive component 2 drives the drive gear 23 to rotate via the servo motor 101, and the drive gear 23 transmits power through meshing with the driven gear 23. This design achieves a similar technical effect to the above-described solution.

[0050] While the disclosure is as stated above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A wheel hub oblique hole tapping machine, comprising a machine head (1), said machine head (1) having a feed gear shaft (11) for driving a cutting tool to move in the vertical direction, characterized in that, The head (1) is fixed with a drive assembly (2) for driving the feed gear shaft (11) to rotate. A dial (12) is coaxially fixed on the feed gear shaft (11). A dial block (121) protrudes from the dial (12). The drive assembly (2) has a dial (21) that can rotate circumferentially. The dial (21) is coaxially arranged with the dial (12) and a dial block (211) protrudes from the dial (21) that can form a blocking force with the dial block (121) in the circumferential direction. The dial block (121) and the dial block (211) can rotate relatively separately and an elastic buffer (3) is provided between the dial block (121) and the dial block (211) to reduce the impact of the tool contacting the workpiece. The first dial block (121) protrudes from the end face of the first dial (12) facing the second dial (21), and the second dial block (211) protrudes from the end face of the second dial (21) facing the first dial (12). The first dial block (121) and the second dial block (211) are adjacent and spaced apart in the circumferential direction. The elastic force of the elastic buffer (3) can act on the adjacent sides of the first dial block (121) and the second dial block (211). When the dial 2 (21) rotates in a single direction, it can drive the dial 2 (211) to approach the dial 1 (121) and compress the elastic buffer (3) to achieve elastic drive. When the dial 1 (121) and the dial 2 (211) move in opposite directions, they separate from each other, and the elastic buffer (3) cannot transmit power to achieve power isolation. This can achieve slow pressure application when the tool and the workpiece are in buffered contact during tapping, and can also achieve free rotation of the feed gear shaft when the tool is retracted, thus improving the service life and operational stability of the overall machine.

2. The wheel hub oblique hole tapping machine according to claim 1, characterized in that, The elastic buffer (3) is a hydraulic buffer. The second dial (211) has a through hole (212) on its side. The elastic buffer (3) is embedded in the through hole (212) and the buffer end of the elastic buffer (3) faces the side of the first dial (121). When the second dial (21) rotates, the buffer end of the elastic buffer (3) can press against the side of the first dial (121) to form a buffer.

3. The wheel hub oblique hole tapping machine according to claim 1, characterized in that, The elastic buffer (3) is a spring. The sides of the first (121) and the second (211) are divided into a receiving groove and a receiving groove. The two ends of the spring are respectively embedded in the receiving groove and the receiving groove. When the first (121) and the second (211) approach each other, the spring can be compressed to form a buffer.

4. A wheel hub oblique hole tapping machine according to any one of claims 1-3, characterized in that, The drive assembly (2) also includes a cylinder (22), a gear (23) and a rack (24). A sleeve seat (25) is fitted on the outer side of the dial one (12) on the head (1). A positioning shaft (26) that can rotate circumferentially is axially fixed inside the sleeve seat (25). The positioning shaft (26) is coaxially arranged with the feed gear shaft (11). The dial two (21) is located inside the sleeve seat (25) and fixed to the end of the positioning shaft (26). The gear (23) is fixed on the other end of the positioning shaft (26). The cylinder (22) is fixed on the head (1) and the rack (24) is connected to the push rod of the cylinder (22). The rack (24) is driven by the cylinder (22) to move back and forth in a single direction. The gear (23) meshes with the rack (24) and is driven to rotate by the rack (24).

5. A wheel hub oblique hole tapping machine according to claim 4, characterized in that, The machine head (1) is fixed with a mounting base (27), and a linear guide rail (28) is laid on the mounting base (27). The rack (24) is fixed on the slider of the linear guide rail (28), and the cylinder (22) is fixed on the mounting base (27) and can push the rack (24) to move back and forth along the arrangement direction of the linear guide rail (28). The linear guide rails (28) are arranged in a direction perpendicular to the orientation of the positioning shaft (26). The slider on the linear guide rails (28) is fixed on the side of the rack (24), and the bottom of the rack (24) has teeth that mesh with the gear (23).

6. A wheel hub oblique hole tapping machine according to any one of claims 1-3, characterized in that, The drive assembly (2) also includes a servo motor (101), which is fixed on the side of the head (1). A drive gear (23) is fixed on the output shaft of the servo motor (101), and a driven gear (23) is coaxially connected to the dial (21). The drive gear (23) meshes with the driven gear (23) for transmission.

7. A wheel hub oblique hole tapping machine according to any one of claims 1-3, characterized in that, The head (1) is equipped with a cutting tool and a cutting tool shaft (5) that drives the cutting tool to rotate. The cutting tool shaft (5) can move vertically and the upper end of the cutting tool shaft (5) is press-fitted with an elastic reset member (4) that keeps the cutting tool shaft (5) always moving upward.

8. A wheel hub inclined hole machining equipment, comprising a frame (8), characterized in that, The frame (8) is arranged in a horizontal direction with a drilling machine (6), a countersinking machine (7) and a tapping machine as described in any one of claims 1-7. A slide (9) is arranged on one side of the distribution path of the drilling machine (6), the countersinking machine (7) and the tapping machine on the frame (8). The slide (9) is used to fix the hub positioning seat.

9. The wheel hub inclined hole processing equipment according to claim 8, characterized in that, The drilling machine (6) and the counterboring machine (7) are respectively equipped with a gear shaft one (61) and a gear shaft two (62). The input ends of the gear shaft one (61) and the gear shaft two (62) are connected to a flexible coupling (10). The drilling machine (6) and the counterboring machine (7) are each equipped with a motor (101) that can drive the respective flexible coupling (10) to rotate. An electric cylinder (81) is provided on one side of the distribution path of the drilling machine (6), the counterboring machine (7) and the tapping machine on the frame (8). The slide (9) is connected to the electric cylinder (81) and is driven by the electric cylinder (81) to move back and forth along the distribution path of the drilling machine (6), the counterboring machine (7) and the tapping machine. The electric cylinder (81) includes a drive motor, a lead screw and a slider. The electric cylinder (81) also includes a guide mating platform (82). The drive motor and the lead screw are both installed on the guide mating platform (82). The slider can be guided to move along the length direction of the guide mating platform (82). The slide table (9) and the slider are connected and move synchronously through a connector (83). The slide table (9) is attached to the upper surface of the guide mating platform (82) and can be guided to move along the length direction of the upper surface of the guide mating platform (82). The upper surface of the guide mating platform (82) is provided with a number of evenly spaced toothed grooves (821) along its length direction. Each toothed groove (821) is arranged along the width direction of the guide mating platform (82), and there is a guide plane (822) between two adjacent toothed grooves (821) that contacts the bottom surface of the slide (9).

10. A wheel hub processing production line, characterized in that, It includes an automatic pick-and-place robot (13), and around the automatic pick-and-place robot (13) are arranged a feeding roller conveyor (14), a chamfering processing device (15), a group drilling machine (16), and a wheel hub inclined hole processing equipment as described in any one of claims 8-9.

11. A wheel hub processing production line according to claim 10, characterized in that, The end of the feeding roller conveyor (14) is provided with a first visual inspection mechanism (141), and the end of the chamfering processing device (15) is provided with a second visual inspection mechanism (151).

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