Intelligent chamfering device for automobile half shaft drilling

Abstract

The invention relates to the field of automobile machinery, in particular to an intelligent chamfering device for automobile half shaft drilling, which comprises a chamfering device, and a connecting column body, a first cutter body and a second cutter body which are arranged in sequence, one end of the connecting column body is connected with a first driving mechanism, and a containing cavity is formed in the connecting column body; the first cutter body and the connecting column body are coaxially arranged and fixedly connected, and the first cutter body is used for chamfering along with rotation of the first driving mechanism; the pressurization mechanism is installed in the containing cavity and used for driving gas in the containing cavity to flow in the gravity direction; outer chamfering is carried out through the first cutter body, inner chamfering is carried out through the second cutter body, outer chamfering and inner chamfering after drilling can be completed through one-time clamping, the process conversion time is shortened, centrifugal force is controlled by controlling the rotating speed of the first driving mechanism, and therefore the pressurization mechanism is controlled by controlling the centrifugal force to adjust the gas pressure in the containing cavity; therefore, the machining requirements of different hole diameters and different chamfering angles can be met without replacing the cutter.

Description

Technical Field

[0001] This application relates to the field of automotive mechanics, and in particular to an intelligent chamfering device for drilling holes in automotive half-shafts. Background Technology

[0002] Currently, in the machining of automotive half-shaft flanges, mounting holes need to be drilled on the flange, and both ends of the holes need to be chamfered to remove burrs and facilitate assembly. The traditional process typically involves drilling the holes first, then replacing the tool with an external chamfering cutter for external chamfering, then disassembling and reassembling the half-shaft, and finally replacing the tool with an internal chamfering cutter for internal chamfering. This method is not only cumbersome, but repeated assembly can also lead to difficulties in guaranteeing the quality of the internal chamfering.

[0003] To address these issues, some composite cutting tools have emerged in the prior art, attempting to integrate drilling and chamfering functions. However, most of these tools can only achieve a combination of drilling and external chamfering; for internal chamfering, there is still a lack of effective solutions to ensure the quality and consistency of chamfering within mounting holes.

[0004] Therefore, there is an urgent need for an intelligent chamfering device that can achieve both external and internal chamfering in a single process after drilling, and that allows for controllable chamfering angles and easy operation. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent chamfering device for drilling automobile half-shafts, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an intelligent chamfering device for drilling automobile half-shafts, comprising a chamfering device, wherein a connecting column, a first cutting body, and a second cutting body are sequentially arranged along the direction of gravity. One end of the connecting column is connected to a first driving mechanism, and a receiving cavity is formed inside the connecting column. The first cutting body is coaxially arranged and fixedly connected to the connecting column, and is used to chamfer the outer corner with the first driving mechanism. The second cutting body includes a cutting edge and a positioning mechanism. Multiple cutting edges are provided, one end of each cutting edge is rotatably connected to the connecting column, and the other end of each cutting edge can rotate along the side away from the connecting column, so that the multiple cutting edges enter a preset motion trajectory. The positioning mechanism is used to move away from the connecting column as the cutting edge moves away from it, so that the cutting edge is in a first preset posture, or to reset as the cutting edge moves towards the connecting column, so that the cutting edge is in a second preset posture.

[0007] Preferably, the chamfering device further includes a pressurizing mechanism installed in the receiving cavity. The pressurizing mechanism includes a pressurizing module and a driving component. One end of the pressurizing module is slidably connected to the connecting column along the direction of gravity, and the other end of the pressurizing module is in contact with the inner wall of the receiving cavity to push the gas in the receiving cavity to flow along the direction of gravity. One end of the driving component is fixedly connected to the pressurizing module, and the other end of the driving component is fixedly connected to the connecting column. The driving component is used to drive the pressurizing module to slide along the direction of gravity.

[0008] Preferably, the positioning mechanism includes a connecting positioning rod and a sliding connecting block. One end of the connecting positioning rod is used to abut against the gas in the receiving cavity, and the other end of the connecting positioning rod is rotatably connected to the sliding connecting block. The sliding connecting block is slidably connected to the cutting edge so that the cutting edge is in a first preset posture.

[0009] Preferably, the positioning mechanism further includes a detection unit, which is used to detect the angle value of the cutting edge rotating and unfolding along the side away from the connecting column and the air pressure value in the receiving cavity.

[0010] Preferably, the positioning mechanism further includes a first elastic element, one end of which is fixedly connected to the cutting edge, and the other end of which is fixedly connected to the connecting column. The first elastic element is used to drive the cutting edge to reset so that the cutting edge is in a second preset posture.

[0011] Preferably, when the cutting edge is in a first preset posture, the diameter of the second tool body is larger than the diameter of the mounting hole; when the cutting edge is in a second preset posture, the diameter of the second tool body is smaller than the diameter of the mounting hole.

[0012] Preferably, the cutting edge is provided with a curved surface adapted to chip discharge, and the inclination direction of the curved surface is the same as the rotation direction of the cutting edge.

[0013] Preferably, the curved surface includes a connecting section, a chip removal section, and a cutting section. The connecting section is used to fix it to the first elastic element. The chip removal section extends from the connecting section towards the mounting hole and is used to guide the chips out. The cutting section extends from the chip removal section towards the mounting hole and is used to chamfer the inner angle of the mounting hole.

[0014] Preferably, the intelligent chamfering device for drilling and drilling automotive half-shafts further includes a clamping mechanism, which is used to clamp, fix, or release and support the automotive half-shaft to be processed.

[0015] Preferably, the intelligent chamfering device for drilling holes in the automotive half-shaft further includes a second drive mechanism, which provides support for the column and drives the column to rotate around its own central axis.

[0016] In summary, this application includes at least one of the following beneficial technical effects: 1. The first cutter body performs external chamfering, and the second cutter body performs internal chamfering. The external and internal chamfering after drilling can be completed in one clamping, reducing process changeover time. At the same time, the first and second cutter bodies rotate coaxially and synchronously. By controlling the speed of the first drive mechanism, the centrifugal force is controlled, and the gas pressure is adjusted by controlling the centrifugal force and the pressurization module, thereby driving the cutting edge to switch postures. This allows it to adapt to the processing requirements of different hole diameters and different chamfer angles without changing the tool.

[0017] 2. The detection unit monitors the cutting edge rotation angle and the air pressure inside the cavity in real time and feeds this information back to the control system for judgment. This determines whether to stop the chamfering device. If the judgment is not necessary, the cutting edge rotates normally for chamfering. If the judgment is necessary, the control system automatically stops the chamfering device while simultaneously helping workers quickly classify and identify problems with the cutting edge, allowing for rapid repair of cutting edges with angles higher or lower than the preset target angle.

[0018] 3. Setting the inclination direction of the curved surface to be consistent with the rotation direction of the cutting edge allows the chips to quickly leave the cutting area along the inclination direction of the curved surface, thereby avoiding chip accumulation or entanglement with the tool, and eliminating the need for operators to frequently stop the machine to clean the chips. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the main view of this application; Figure 2 This is a cross-sectional structural schematic diagram of the second blade of this application; Figure 3 This application Figure 2 An enlarged view of the structure at point A in the middle; Figure 4 This is a schematic diagram of the chamfering device structure of this application; Figure 5 This application Figure 4 An enlarged view of the structure at point B in the middle; Figure 6 This is a side view of the second blade of this application; Figure 7 This is a top view of the overall structure of this application; Figure 8 This is a cross-sectional structural diagram of this application.

[0020] Explanation of reference numerals in the attached drawings: 1. Chamfering device; 2. Connecting column; 21. Receiving cavity; 22. Guide groove; 221. First guide groove; 222. Second guide groove; 3. First cutter body; 31. Outer chamfer section; 4. Second cutter body; 41. Cutting edge; 411. Receiving groove; 412. Curved surface; 4121. Connecting section; 4122. Chip removal section; 4123. Cutting section; 42. Positioning mechanism; 421. Connecting positioning rod; 422. Sliding connecting block; 423. Detection unit; 4231. Angle sensor; 4232. Pressure sensor; 424. First elastic element; 5. Pressurizing mechanism; 5 1. Pressure boosting module; 511. Sliding end; 512. Pressure boosting end; 52. Drive assembly; 521. Second elastic element; 522. Drive block; 6. First drive mechanism; 61. First drive component; 62. Second drive component; 63. Third drive component; 64. Mounting bracket; 7. Clamping mechanism; 71. Column; 711. First slide rail; 72. Mounting base; 721. Second slider; 73. Clamping block; 731. First slider; 74. Fourth drive component; 8. Second drive mechanism; 81. Bearing base plate; 811. Second slide rail; 82. Drive rod; 83. Fifth drive component; 84. Sixth drive component. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0022] Reference Figure 1 , Figure 2 and Figure 3 This application discloses an intelligent chamfering device for drilling automobile half shafts, including a chamfering device 1. The chamfering device 1 is provided with a connecting column 2, a first cutter body 3 and a second cutter body 4 arranged sequentially along the direction of gravity. The components form a coaxial structure from top to bottom, so that power can be stably transmitted between the components.

[0023] The connecting column 2 is connected to a first driving mechanism 6 at one end. The first cutter body 3 is coaxially mounted and fixedly connected to the connecting column 2. The first driving mechanism 6 drives the connecting column 2 to rotate, thereby causing the first cutter body 3 to rotate around its own center line. The coaxial connection improves the overall coaxiality of the device and effectively avoids chamfering errors caused by eccentricity during processing.

[0024] The outer wall of the first cutter body 3 is configured as an outer chamfer section 31. The diameter of the outer chamfer section 31 gradually decreases along the direction of gravity. The approximately conical or inverted trapezoidal outer chamfer section 31 can directly contact the outer wall of the drilling hole in the automobile half-shaft as the first cutter body 3 rotates and moves along the direction of gravity. Thus, the cutting of the outer chamfer of the mounting hole is automatically completed during rotation through the conical or inverted trapezoidal structure with decreasing diameter.

[0025] refer to Figure 1 and Figure 2 Specifically, the first driving mechanism 6 includes a first driving member 61, a second driving member 62, and a third driving member 63. The first driving member 61 drives the second driving member 62 and the third driving member 63 to move in a direction perpendicular to gravity. The second driving member 62 drives the third driving member 63 to move in the direction of gravity. The third driving member 63 drives the first cutting body 3 and the second cutting body 4 to process the automotive half-shaft mounting hole via the connecting column 2. The first driving member 61 is fixedly connected to the device housing via a mounting bracket 64. The first driving member 61, the second driving member 62, and the third driving member 63 are all configured as drive motors.

[0026] See Figure 2 and Figure 3 The connecting column 2 is provided with a receiving cavity 21 and a guide groove 22. The receiving cavity 21 is used to receive and restrict the flow direction of gas. The guide groove 22 includes a first guide groove 221 and a second guide groove 222. The first guide groove 221 extends along the direction of gravity and has two openings. The two first guide grooves 221 are located on both sides away from the center line of the connecting column. The second guide groove 222 extends in a direction perpendicular to gravity.

[0027] Continue reading Figure 2 and Figure 3 In this embodiment, the pressurizing mechanism 5 includes a pressurizing module 51 and a driving assembly 52. ​​The pressurizing module 51 has a sliding end 511 and a pressurizing end 512. The number of sliding ends 511 of the pressurizing module 51 is equal to the number of first guide grooves 221, and both are slidably connected to the first guide grooves 221 opened in the connecting column along the direction of gravity. The pressurizing end 512 of the pressurizing module 51 is in contact with the inner wall of the receiving cavity 21.

[0028] The drive assembly 52 is disposed within the second guide groove 222. The drive assembly 52 includes a second elastic element 521 and a drive block 522. One end of the second elastic element 521 is fixedly connected to the inner wall of the second guide groove 222, and the other end is fixedly connected to the drive block 522. The other end of the drive block 522 is in contact with the sliding end 511 of the pressure boosting module 51. The second elastic element 521 is configured as a return spring, and is in a compressed state when the cutting edge 41 is in a second preset posture.

[0029] Specifically, the side of the sliding end 511 of the booster module 51 that is in contact with the drive block 522 is set as an inclined surface, and the contact surface of the drive block 522 is correspondingly set as a reverse inclined surface. The booster module 51 itself will be in an initial position under the action of gravity, which is set as the position where the reverse inclined surface of the drive block 522 is in contact with the maximum diameter of the inclined surface of the sliding end 511 of the booster module 51. When the first drive mechanism 6 drives the connecting column 2 to start rotating, the drive block 522 gradually slides towards the booster module 51 along the second guide groove 222 as the rotation speed increases and the thrust of the second elastic element 521 works together, and gradually slides and presses the in contacting inclined surface through the reverse inclined surface.

[0030] Understandably, the higher the rotation speed of the first drive mechanism 6, the faster the connecting column 2 rotates. The faster the connecting column 2 rotates, the greater the centrifugal force will be. The greater the centrifugal force, the greater the influence of the centrifugal force on the drive block 522. As a result, the drive block 522 will squeeze the pressurization module 51 to move a corresponding distance along the opening direction of the first guide groove 221 according to the magnitude of the centrifugal force, thereby compressing the gas in the receiving cavity 21 and increasing the gas pressure in the receiving cavity 21 to form a positive pressure.

[0031] Continue reading Figure 2 and Figure 3 In this embodiment, the second blade 4 includes a cutting edge 41 and a positioning mechanism 42, with one end of the cutting edge 41 rotatably connected to the other end of the connecting column 2.

[0032] Specifically, the compressed gas acts directly on the sliding end of the positioning mechanism 42 located in the receiving cavity 21. By controlling the pressurization mechanism 5, the gas pressure in the receiving cavity 21 is adjusted, thereby enabling the positioning mechanism 42 to drive the cutting edge 41 to switch postures.

[0033] Understandably, when the connecting column 2 rotates, the cutting edge 41 revolves around the center line of the connecting column 2 along with the overall revolution of the device. Under the action of centrifugal force, the other end of the cutting edge 41 will drive the connecting end of the cutting edge 41 to rotate radially along the connecting column 2, so that the cutting edge 41 enters the preset motion trajectory. As the rotation speed of the first drive mechanism 6 increases, the centrifugal force increases accordingly, causing the cutting edge to accelerate away from the connecting column 2, preparing for internal chamfering. A receiving groove 411 is also provided on the side of the cutting edge 41 facing the connecting column 2.

[0034] Continue reading Figure 3 and Figure 4 Specifically, the positioning mechanism 42 includes a connecting positioning rod 421 and a detection unit 423. One end of the connecting positioning rod 421 is slidably connected to the receiving cavity 21 and can contact the gas in the receiving cavity 21 and withstand the gas pressure. The other end of the connecting positioning rod 421 is rotatably connected to a sliding connecting block 422. The sliding connecting block 422 is slidably installed in the receiving groove 411 and abuts against the receiving groove 411.

[0035] As the air pressure inside the receiving cavity 21 increases, the gas pressure acts directly on the end face of the connecting positioning rod 421 that abuts against it, generating an axial thrust in the direction away from the connecting column 2. This pushes the connecting positioning rod 421 to slide in the same direction within the receiving cavity 21. Simultaneously, the other end of the connecting positioning rod 421, through the rotatably connected sliding connecting block 422, pushes the cutting edge 41 to rotate outward around the rotation fulcrum of the connecting column 2. This pushes the cutting edge 41 to unfold to the first preset posture, at which point the cutting edge 41 contacts the inner wall of the half-shaft drill hole, thus performing internal chamfering.

[0036] The detection unit 423 includes an angle sensor 4231 and a pressure sensor 4232. One end of the angle sensor 4231 is fixedly connected to the outer wall of the connecting column 2, and the detection end of the angle sensor 4231 is positioned towards the side where the cutting edge 41 is rotatably connected to the connecting column 2, so as to detect the angle at which the cutting edge 41 rotates and unfolds away from the side away from the connecting column 2. One end of the pressure sensor 4232 is fixedly connected to the end of the connecting positioning rod 421 located inside the receiving cavity 21, and the detection end of the pressure sensor 4232 is used to detect the air pressure inside the receiving cavity 21.

[0037] Specifically, as the air pressure inside the accommodating cavity 21 increases, the gas thrust is transmitted to the cutting edge 41 through the connecting positioning rod 421 and the sliding connecting block 422, and is converted into a torque that drives the cutting edge 41 to rotate outward around the pivot point. At the same time, the centrifugal force generated by the high-speed rotation of the cutting edge 41 with the connecting column 2 also generates a torque that drives it to unfold. The angle sensor 4231 continuously feeds back the detected rotation angle value to the control system in real time.

[0038] The control system includes target angle and target pressure values. The target angle corresponds to the chamfer angle of the required half-shaft mounting hole. The control system can compare the actual angle value fed back by the angle sensor 4231 with the target angle value. The target pressure value corresponds to the air pressure in the accommodating cavity 21 when the cutting edge reaches the required chamfer angle of the half-shaft mounting hole.

[0039] Understandably, the control system compares the received angle value electrical signal with the preset target angle value stored in the control system, thereby determining whether the cutting edge 41 has rotated to the predetermined cutting angle based on the detected angle value. If the result is yes, the second tool body 4 is driven to perform chamfering. If the result is no, the speed of the first drive mechanism 6 is adjusted to control the degree of gas compression of the pressurizing mechanism 5, and the pressurizing mechanism 5 further adjusts the air pressure in the receiving cavity 21. Finally, the air pressure is adjusted to control the angle at which the connecting positioning rod 421 pushes the cutting edge 41 to rotate and unfold, until the actual angle is reached and stabilized at the target angle. At this time, the control system maintains the current speed and performs stable chamfering cutting.

[0040] Meanwhile, if the detected cutting edge 41 angle value is significantly higher or lower than the preset target angle value, the chamfering device 1 will automatically stop working, and the chamfering device 1 should be inspected by the staff.

[0041] Specifically, the number of cutting edges 41 can be set to two or more. In this embodiment, two cutting edges 41 are preferred. The number of connecting positioning rods 421 corresponds to the number of cutting edges 41. The function of the pressure sensor 4232 is to facilitate the operator to quickly locate the faulty part of the mechanism. Similarly, the control system compares the received pressure value electrical signal with the preset target pressure value stored in the control system. If the pressure sensor 4232 detects that the pressure between the two connecting positioning rods 421 is equal, the detected pressure value is higher than the target pressure value, and the rotation angle of the two cutting edges 41 exceeds the preset target angle but the current rotation angle is the same, it indicates that the second elastic element 521 in the pressurizing mechanism 5 is damaged, which causes the drive block 522 to displace excessively along the second guide groove 222, thereby pushing the pressurizing module 51 to press down excessively, causing the air pressure in the accommodating cavity 21 to be too high.

[0042] If the pressure sensor 4232 detects that the pressure between the two connecting positioning rods 421 is equal and the detected pressure value corresponds to the target pressure value, but neither of the two cutting edges 41 has rotated to the target angle and the current rotation angle is the same, it indicates that one end of the two connecting positioning rods 421 is stuck in the receiving cavity 21, the sliding block 422 is stuck in the receiving groove 411, or the cutting edge 41 is stuck with the rotation fulcrum of the connecting column 2.

[0043] If the pressure sensor 4232 detects that the pressure on two or more connecting positioning rods 421 is equal and the detected pressure value corresponds to the target pressure value, but neither of the two cutting edges 41 has rotated to the target angle and the current rotation angles are inconsistent, it indicates that one end of the two connecting positioning rods 421 is stuck in the receiving cavity 21, the sliding connecting block 422 is stuck in the receiving groove 411, or the cutting edge 41 is stuck with the rotation fulcrum of the connecting column 2. The sticking phenomenon of the connecting positioning rod 421, the sliding connecting block 422 and the cutting edge 41 on the side with a smaller rotation angle is more serious.

[0044] If the pressure sensor 4232 detects that the pressure between the two connecting positioning rods 421 is equal, the detected pressure value is lower than the target pressure value, and neither of the two cutting edges 41 has rotated to the target angle but the current rotation angle is the same, it indicates that there may be gas leakage in the accommodating cavity 21, resulting in a decrease in air pressure.

[0045] If the pressure sensor 4232 detects that the pressure between the two connecting positioning rods 421 is equal, the detected pressure value is lower than the target pressure value, and neither of the two cutting edges 41 has rotated to the target angle and the current rotation angles are inconsistent, it indicates that not only may there be gas leakage in the receiving cavity 21, but also that one end of the two connecting positioning rods 421 is stuck in the receiving cavity 21 or the rotation fulcrum of the cutting edge 41 is stuck with the connecting column 2, and the stuck phenomenon is more serious at the end of the cutting edge with the smaller rotation angle.

[0046] When the above situation occurs, the pressure value detected by the pressure sensor 4232 is compared with the target pressure value set in the control system, and the angle value detected by the angle sensor 4231 is compared with the target angle value set in the control system. In this way, when the control system automatically controls the chamfering device 1 to stop working, it can help the staff quickly classify and identify the problems of the cutting edge 41, and thus quickly repair the cutting edge 41 that is lower than the preset target angle.

[0047] See Figure 4 and Figure 5 In this embodiment, the positioning mechanism 42 further includes a first elastic element 424, one end of which is fixedly connected to the cutting edge 41, and the other end of which is fixedly connected to the connecting column 2. When it is necessary to reduce the chamfer angle of the mounting hole or to exit the machining process, the first driving mechanism 6 and the pressurizing mechanism 5 reduce their speed or stop working, thereby causing the air pressure in the receiving cavity 21 to start decreasing synchronously, and thus causing the thrust of the air pressure on the connecting positioning rod 421 to decrease or disappear synchronously.

[0048] Under the tension of the first elastic element 424, the cutting edge 41 retracts towards the connecting column 2, thereby squeezing the connecting positioning rod 421 closer to the connecting column 2 and reducing the unfolding angle of the cutting edge 41. This effectively adjusts the chamfer angle of the cutting edge 41 while preventing interference between the cutting edge 41 and the automobile half-shaft during machining exit. The first elastic element 424 is set as a return spring.

[0049] Specifically, the preset motion trajectory is set as the positional change of the cutting edge 41 from a retracted state to a first preset posture during the process of gradually unfolding under the combined action of centrifugal force and the thrust of the connecting positioning rod 421. The first preset posture is set as the position where the cutting edge 41 reaches the specified chamfer angle for cutting the automobile half-shaft. The second preset posture is set as the position where, after machining is completed, the first drive mechanism 6 and the pressurization mechanism 5 stop working, the air pressure and centrifugal force decrease synchronously until they disappear, and the cutting edge 41, under the pulling force of the first elastic element 424, presses the connecting positioning rod 421 towards the connecting column 2 to complete the retraction.

[0050] Specifically, the specified chamfer angle of the automotive half-shaft is determined by the different batches and specifications of the automotive half-shafts to be processed. The material of the cutting edge 41 is set to a hard material, which is specifically determined according to the material characteristics of the automotive half-shaft to be processed, and can be one of high-speed steel, cemented carbide, or coated cemented carbide.

[0051] Continue reading Figure 1 , Figure 2 and Figure 3 In this embodiment, the preset motion trajectory relationship formula is: S1=S2, F1=F2, and R is positively correlated with S1. The rotational speed S1 of the first drive mechanism 6 directly determines the rotational speed S2 of the connecting column 2. The second cutter body 4 rotates coaxially with the connecting column 2, and the cutting edge 41 generates centrifugal force F1 when it revolves with the connecting column 2. The centrifugal force F1 acts on the cutting end of the cutting edge 41, causing the connecting end of the cutting edge 41 to generate an unfolding torque that rotates radially along the connecting column 2, pushing the cutting edge 41 to rotate away from the connecting column 2, thereby increasing the rotation angle R of the cutting edge 41 to a specified angle corresponding to the chamfer angle.

[0052] The pressurization mechanism 5 is designed so that the air pressure in the accommodating cavity 21 is proportional to the displacement distance of the pressurization module 51. The pneumatic thrust F2 pushes against the connecting positioning rod 421, and then transmits the thrust to the cutting edge 41 through the connecting positioning rod 421, generating an unfolding torque in the same direction as F1 to push the cutting edge 41 to unfold, so that the cutting edge 41 can stably enter the preset motion trajectory, thereby achieving the chamfering requirements of different hole diameters.

[0053] In this embodiment, the relationship formula for the first preset posture is F1+F2+F3=F4+F5. The driving force, including centrifugal force F1, aerodynamic thrust F2, and supporting force F3, all act in the direction that pushes the cutting edge 41 away from the connecting column 2. They collectively provide the unfolding power and work together to push the cutting edge 41 during cutting. At this time, the total driving force acting on the cutting edge 41, F1+F2+F3, is equal to or slightly greater than the total resistance force F4+F5 during cutting, thereby stabilizing the posture of the cutting edge 41 during processing and preventing the unfolding angle R of the cutting edge 41 from shifting due to vibration or load fluctuations.

[0054] Specifically, the first drive mechanism 6 acts as the basic driving force to drive the connecting column 2 to rotate around its own centerline. The cutting edge 41 revolves synchronously with the connecting column 2 and generates centrifugal force F1 due to the rotational motion, ensuring that the cutting edge 41 can quickly overcome the initial resistance during the start-up phase. At the same time, because the pressurization mechanism 5 determines the degree of gas compression, it can determine the gas pressure in the accommodating cavity 21, thereby controlling the magnitude of the thrust of the connecting positioning rod 421 on the cutting edge 41.

[0055] It can be understood that when the pressurizing mechanism 5 compresses the gas in the accommodating cavity 21, the connecting positioning rod 421 slides axially along the cavity under the action of the gas pressure. While pushing against the cutting edge 41, the inner wall of the cavity can generate a radial supporting force on the connecting positioning rod 421, thereby preventing the connecting positioning rod 421 from being eccentrically swayed during the sliding process, resulting in the deviation of the expansion angle R of the cutting edge 41.

[0056] Continue to refer to Figure 1 、 Figure 2 and Figure 3 The resistance includes the pulling force F4 generated by the first elastic member 424 and the retracting force F5 generated during cutting, and both act in the direction of hindering the expansion of the cutting edge 41 and promoting its reset. Among them, one end of the first elastic member 424 is fixed to the connecting column 2, and the other end is connected to the side of the cutting edge 41 facing the rotation fulcrum, thereby providing a reset power for the reset of the cutting edge 41 after the machining is completed.

[0057] Specifically, when the cutting edge 41 contacts the inner wall of the installation hole of the automotive half shaft for chamfer cutting, the inner wall of the installation hole will exert a cutting reaction force on the cutting edge 41, and the component force of the cutting reaction force in the direction of hindering the expansion of the cutting edge 41 is the retracting force F5, and the retracting force F5 also acts in the direction of the cutting edge 41 retracting towards the connecting column 2. When the cutting aperture increases and a larger expansion angle is required or the workpiece material is relatively hard, by increasing the rotational speed of the first driving mechanism 6 to increase the centrifugal force F1 and synchronously increasing the pneumatic thrust F2 generated by the pressurizing mechanism 5 compressing the gas, so that F1 + F2 + F3 is further greater than F4 + F5, thereby while pushing the cutting edge 41 to continue to expand to match the chamfer machining of the large aperture, it can also provide a greater supporting force for the cutting edge 41 to cut the workpiece with a harder material, ensuring that the driving force is always greater than the resistance, and effectively avoiding the cutting edge 41 from retracting due to excessive resistance.

[0058] Continue to refer to Figure 1 、 Figure 2 and Figure 3 In this embodiment, the relational formula of the second preset posture is F1 + F2 + F3 < F4. After the machining is completed, both the first driving mechanism 6 and the pressurizing mechanism 5 stop working. At this time, the total driving force F1 + F2 + F3 acting on the cutting edge 41 is less than the reset pulling force F4 brought by the first elastic member 424. Under the pulling force of the first elastic member 424, the positioning mechanism 42 and the cutting edge 41 are reset towards the connecting column 2 together, so that the cutting edge 41 is in the second preset posture. The automatic contraction and reset of the cutting edge 41 are realized through the pulling force of the first elastic member 424, ensuring the machining safety and machining continuity.

[0059] Specifically, by switching the unfolding angle of the preset motion trajectory of the cutting edge 41, the diameter of the second cutter body 4 can be dynamically matched with the diameter of the mounting hole. When the second cutter body 4 is in the first preset posture, the cutting edge 41 is fully unfolded, and the diameter of the second cutter body 4 is larger than the diameter of the mounting hole, thereby ensuring that the cutting edge 41 contacts the inner wall of the hole and performs chamfering. When the cutting edge 41 is in the second preset posture, the cutting edge 41 retracts, and the diameter of the second cutter body 4 is smaller than the diameter of the mounting hole, thereby ensuring that the tool safely enters or exits the automotive half-shaft mounting hole.

[0060] See Figure 5 and Figure 6 In this embodiment, the cutting edge 41 is provided with a curved surface 412 adapted to chip discharge, and the inclination direction of the curved surface 412 is the same as the rotation direction of the cutting edge 41. This guides the chips to quickly leave the cutting area along the inclination direction of the curved surface 412, avoiding chip accumulation in the machining area of ​​the cutting edge 41, which could cause blockage and reduce machining quality.

[0061] In this embodiment, the curved surface 412 includes a connecting section 4121, a chip removal section 4122, and a cutting section 4123. The connecting section 4121 can be fixedly connected to the first elastic member 424. The chip removal section 4122 extends from the connecting section 4121 toward the inner corner of the mounting hole and is used to guide the chips out. The cutting section 4123 extends from the chip removal section 4122 toward the inner corner of the mounting hole and is used to contact the inner corner of the mounting hole when the cutting edge 41 is in a first preset posture, and cuts the inner corner of the mounting hole as the cutting edge 41 rotates and moves along the direction of gravity.

[0062] Understandably, when the cutting edge 41 cuts into the mounting hole of the automotive half-shaft, the metal material undergoes plastic deformation under shear stress, forming continuous or discontinuous chips that flow along the rake face. Since the inclined direction of the curved surface 412 is the same as the rotation direction of the cutting edge 41, the curved surface 412 acts as a spiral pusher when the cutting edge 41 rotates, applying a resultant force of circumferential thrust and radial centrifugal force to the chips. The direction of this resultant force is consistent with the inclined direction of the curved surface 412, allowing the chips to quickly and obliquely leave the cutting zone along the curved surface 412, thus preventing chip accumulation or entanglement with the tool, and eliminating the need for frequent machine stops for chip cleaning.

[0063] Continue reading Figure 5 and Figure 6 Specifically, the inclination direction of the curved surface 412 is set to be consistent with the rotation direction of the cutting edge 41. That is, the curved surface 412 is inclined from the surface of the cutting edge 41 that contacts the chip, i.e., the rake face, to the surface opposite to the machined surface of the automotive half-shaft mounting hole, i.e., the flank face. If the cutting edge 41 is set to rotate clockwise, then the curved surface 412 is inclined to the right and downward from the cutting edge of the cutting edge 41.

[0064] See Figure 1 and Figure 7In this embodiment, the intelligent chamfering device for drilling automobile half-shafts further includes a clamping mechanism 7, which includes columns 71, mounting base 72, clamping blocks 73, and a fourth driving component 74. Two columns 71 are symmetrically arranged, with the distance between them greater than the diameter of the automobile half-shaft to be processed. The two columns 71 are located at one end of the mounting base 72 facing the chamfering device 1, and the other end of the mounting base 72 is hollow and open. A first slide rail 711 is provided at the end of the two columns 71 facing the chamfering device 1. Similarly, two clamping blocks 73 are symmetrically arranged, with a first slider 731 at the bottom of each clamping block 73, and the two first sliders 731 are slidably connected to the two first slide rails 711 respectively.

[0065] The fourth drive member 74 is fixedly connected to the end of the clamping block 73 away from the half shaft of the automobile to be processed. The fourth drive member 74 is used to drive the clamping block 73 to move closer to the half shaft of the automobile to be processed to clamp and fix the half shaft of the automobile to be processed, or to move away from the half shaft of the automobile to be processed to release and carry the half shaft of the automobile to be processed.

[0066] Specifically, the two symmetrically arranged columns 71 provide basic positioning for the car half-shaft, making it easy to place the car half-shaft between the two columns 71. This allows the clamping force generated by the clamping block 73 installed on the column 71 to be evenly distributed on both sides of the car half-shaft flange to be processed, avoiding positioning displacement of the car half-shaft due to uneven force on both sides.

[0067] The first slide rail 711 on the column 71 provides a precise movement path for the clamping block 73, enabling the clamping block 73 to clamp both sides of the automobile half-shaft flange to be processed in a direction parallel to the axis of the automobile half-shaft. This ensures that the clamping surfaces of the two clamping blocks 73 are fully in contact with the outer circle of the automobile half-shaft, effectively avoiding radial misalignment force during clamping.

[0068] Continue reading Figure 5 and Figure 6 The fourth drive component 74 is configured as a drive connecting pipe. One end of the fourth drive component 74 is fixedly connected to the end of the clamping block 73 away from the half shaft of the automobile to be processed, and the other end is connected to an external air source. According to the predetermined program of the control system, the external air source is controlled by an electrical signal to start supplying air through the fourth drive component 74 or to shut off the air supply, so as to control the clamping block 73 to fix or release the half shaft of the automobile to be processed.

[0069] See Figure 7 and Figure 8In this embodiment, the intelligent chamfering device for drilling and drilling automotive half-shafts further includes a second drive mechanism 8. The second drive mechanism 8 includes a supporting base plate 81, a drive rod 82, a fifth drive component 83, and a sixth drive component 84. A second slide rail 811 is provided on the side of the supporting base plate 81 facing away from the ground, and a second slider 721 is provided at the open end of the mounting base 72 facing away from the chamfering device 1. The supporting base plate 81 is slidably connected to the second slider 721 located at the open end of the mounting base 72 via the second slide rail 811, thereby providing support for the column 71.

[0070] One end of the drive rod 82 is rotatably connected to the side of the mounting base 72 facing away from the chamfering device 1 and away from the center line, while the fifth drive member 83 is fixedly connected to the other end of the drive rod 82. Thus, the fifth drive member 83 drives the drive rod 82 to move, which in turn pushes the mounting base 72 and the clamped car half-shaft to move along the bearing base plate 81 in a direction perpendicular to gravity, i.e., horizontally. The fifth drive member 83 is configured as a drive motor.

[0071] Continue reading Figure 7 and Figure 8 The sixth driving component 84 is fixedly connected to the hollow cavity of the mounting base 72, and its power output end is fixedly connected to the side of the column 71 facing the mounting base 72. This drives the column 71 to rotate around its own central axis, thereby enabling the column 71 and the automobile half-shaft clamped and fixed by the clamping block 73 on the column 71 to automatically switch positions relative to the chamfering device 1, thus cutting and chamfering the mounting holes at different positions on the circumference of the automobile half-shaft flange. This allows the external and internal chamfering processes to be completed in one clamping, effectively reducing machining time and coaxiality error.

[0072] Specifically, the sixth driving component 84 is configured as a drive motor, the power output end of the sixth driving component 84 is the output shaft of the drive motor, the motor end of the sixth driving component 84 is fixedly connected to the hollow cavity of the mounting base 72, and the output shaft end of the sixth driving component 84 passes through the mounting base 72 and connects to the column 71. The column 71 and the mounting base 72 are connected by abutment.

[0073] See Figure 1 and Figure 5 Understandably, when it is necessary to chamfer the outer or inner corners of the car half-shaft mounting hole, after the car half-shaft is clamped and stabilized, the first drive component 61 is activated, thereby driving the second drive component 62 and the third drive component 63 to move to the machining position aligned with the car half-shaft. After reaching the position, the second drive component 62 is activated, thereby driving the third drive component 63 and the first cutter body 3 and the second cutter body 4 to move along the direction of gravity.

[0074] At the same time, the third drive unit 63 is activated, thereby driving the first cutter body 3 and the second cutter body 4 to rotate around their own center line. At this time, the third drive unit 63 controls the first cutter body 3 to perform external chamfering on the car half shaft mounting hole and the second cutter body 4 to perform internal chamfering on the car half shaft.

[0075] See Figure 1 and Figure 7 After chamfering one of the car half-shaft mounting holes, the fifth drive member 83 drives the drive rod 82 to move the mounting base 72 and the clamped car half-shaft along the bearing base plate 81 in a direction perpendicular to gravity. At the same time, the sixth drive member 84 rotates synchronously to drive the column 71 and the car half-shaft clamped by the clamping block 73 on it to rotate, thereby aligning the other car half-shaft mounting hole with the first cutter body 3 and the second cutter body 4. Then, the above steps are repeated to chamfer the mounting holes on the car half-shaft in sequence.

[0076] The implementation principle of this embodiment is as follows: The first driving mechanism 6 drives the connecting column 2 to rotate. The first cutter body 3 rotates with the connecting column 2, and its tapered outer chamfer section 31, whose outer wall diameter decreases, directly contacts the mounting hole of the automobile half-shaft, and completes the outer chamfer cutting through rotation. At the same time, since the connecting column 2 and the first cutter body 3 are coaxially arranged and fixedly connected, and the pressurizing mechanism 5 is arranged in the receiving cavity 21, when the first driving mechanism 6 starts to rotate, the driving block 522 will be displaced along the direction of the second guide groove 222 under the action of centrifugal force, thereby squeezing and pushing the sliding end 511 of the pressurizing module 51 that is in contact with it to move along the direction of gravity, so that it can compress the gas in the receiving cavity 21, thereby further increasing the air pressure in the receiving cavity 21. The air pressure will further act on the end face of the connecting positioning rod 421 that is in contact with it, pushing the cutting edge 41 to unfold. The cutting edge 41 is connected to the connecting column 2 via a rotating connection. Under the action of centrifugal force and gas thrust, it enters a preset motion trajectory and increases its rotation speed according to the chamfered hole diameter and the material of the automobile half-shaft, eventually rotating to the first preset posture. At this time, the total driving force is equal to or slightly greater than the total resistance during cutting, and the workpiece is processed. During the movement and processing of the cutting edge 41, the detection unit 423 detects the thrust applied by the connecting positioning rod 421 in real time and feeds it back to the control system. Based on the applied thrust, the control system judges the air pressure value in the receiving cavity 21, and then judges whether the cutting edge unfolding angle is correct based on the air pressure value, so as to adjust the rotation speed to correct the cutting edge unfolding angle. If the detected pressure is significantly abnormal or the pressure on multiple cutting edges 41 is uneven, the machine will automatically stop. After processing is completed, the drive mechanism and the pressurization mechanism stop working, so that the centrifugal force and air pressure disappear. The first elastic element 424 pulls the cutting edge 41 back to the second preset posture to avoid interference with the half-shaft when exiting. The symmetrical clamping mechanism 7 is set to achieve stable clamping of the half shaft, and the second drive mechanism 8 drives the mounting base 72 to move laterally and the column 71 to rotate, thus completing the switching of multiple mounting hole positions.

[0077] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automobile half shaft drilling and intelligent chamfering device, characterized in that, Including chamfering device (1), the chamfering device (1) is sequentially provided with along gravity direction: Connecting column (2), one end is connected with first drive mechanism (6), the accommodating cavity (21) is set up in the connecting column (2); First tool body (3) is coaxially arranged with the connecting column (2) and is fixedly connected, the first tool body (3) is used for rotating with the first drive mechanism (6) and turns out the outer angle; Second tool body (4) includes: Cutting edge (41) is equipped with multiple, multiple cutting edges (41) one end rotationally connected in the connecting column (2), multiple cutting edges (41) the other end can rotate away from the connecting column (2) one side, to make multiple cutting edges (41) enter preset trajectory; Positioning mechanism (42) is used for with cutting edge (41) away from the connecting column (2) far, makes cutting edge (41) be in first preset posture, or with cutting edge (41) towards the connecting column (2) reset, makes cutting edge (41) be in second preset posture.

2. The automobile half shaft drilling and intelligent chamfering device according to claim 1, characterized in that, The chamfering device (1) further includes booster mechanism (5), the booster mechanism (5) is arranged in the accommodating cavity (21), the booster mechanism (5) includes: Boosting module (51) one end slidingly connected in the connecting column (2) along gravity direction, the other end of the boosting module (51) and the accommodating cavity (21) inner wall are conformed, for drive the gas in the accommodating cavity (21) flow along gravity direction; Drive assembly (52) one end and the boosting module (51) fixedly connected, the other end and the connecting column (2) fixedly connected, the drive assembly (52) is used for driving the boosting module (51) sliding along gravity direction.

3. The device according to claim 1, wherein, The positioning mechanism (42) includes connecting positioning rod (421) and sliding connection block (422), the connecting positioning rod (421) one end is used for with the gas in the accommodating cavity (21) abuts, the other end of the connecting positioning rod (421) and the sliding connection block (422) rotationally connected, the sliding connection block (422) and cutting edge (41) slidingly connected, to make cutting edge (41) be in first preset posture.

4. The device according to claim 3, characterized in that, The positioning mechanism (42) further includes detection unit (423), the detection unit (423) is used for detecting the angle value of cutting edge (41) away from the connecting column (2) one side rotationally developed and the gas pressure value in the accommodating cavity (21).

5. The device according to claim 4, wherein, The positioning mechanism (42) further includes first elastic member (424), the first elastic member (424) one end and cutting edge (41) fixedly connected, the other end of the first elastic member (424) and the connecting column (2) fixedly connected, the first elastic member (424) is used for driving cutting edge (41) reset, to make cutting edge (41) be in second preset posture.

6. The device as claimed in claim 1, wherein, When the cutting edge (41) is in first preset posture, the second tool body (4) diameter is greater than the mounting hole diameter, when the cutting edge (41) is in second preset posture, the second tool body (4) diameter is less than the mounting hole diameter.

7. The device as claimed in claim 1, wherein, The cutting edge (41) is provided with a curved surface (412) adapted to chip discharge, and the inclined direction of the curved surface (412) is the same as the rotation direction of the cutting edge (41).

8. The device according to claim 7, characterized in that, The curved surface (412) comprises: a connecting section (4121) for fixed connection with the first elastic member (424); a chip discharge section (4122) extending on the side of the connecting section (4121) towards the mounting hole, for guiding chip discharge; a cutting section (4123) extending on the side of the chip discharge section (4122) towards the mounting hole, for inverting the inner angle of the mounting hole.

9. The device as claimed in claim 1, wherein, The automobile half shaft drilling and intelligent chamfering device further comprises a clamping mechanism (7) for clamping, fixing or loosening and bearing the automobile half shaft to be machined.

10. The device according to claim 9, wherein, The automobile half shaft drilling and intelligent chamfering device further comprises a second driving mechanism (8) for providing support for the clamping mechanism (7) and driving the clamping mechanism (7) to rotate around the central axis thereof.

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