Intelligent finishing production line for automobile starter housing

Abstract

The application relates to an automobile starter shell intelligent finishing production line applied to the field of metal combination machining, which comprises a conveying belt, a finishing device, a mechanical arm, a conveying disc and a fine milling mechanism; wherein the fine milling mechanism comprises a plurality of fine milling cutters which are uniformly distributed in a circle, so that the shell is uniformly stressed in the horizontal direction, the traditional shell heat dissipation fin machining mode of utilizing milling cutters to mill one by one is replaced, the probability of horizontal deviation and vibration of the shell during milling is reduced, and the forming quality and forming consistency of the heat dissipation fin are improved; meanwhile, the annular cylinder and the first hydraulic cylinder are matched, so that the plurality of fine milling cutters move synchronously from bottom to top, the accumulation of milling chippings in the milling groove is reduced, and the milling quality and forming efficiency are improved, and the problems of milling control complexity and low machining efficiency caused by the complex milling path of the traditional single milling cutter are overcome; in addition, the preprocessing mechanism comprising a rough milling cutter and a polishing roller further improves the milling quality of the heat dissipation fin.

Description

TECHNICAL FIELD

[0001] The application relates to a shell production line, in particular to an intelligent finishing production line for a starter motor shell in the field of metal combination processing. BACKGROUND

[0002] The starter motor shell finishing production line is a key link for precision machining of a cast body, and core processes thereof include high-precision milling of motor shell cooling fins. In a traditional machining process, a single milling cutter needs to perform a complex three-dimensional tool path to complete the profile forming due to the dense and narrow groove structure between the cooling fins, which not only greatly reduces the machining efficiency, but also generates periodic extrusion force due to the continuous contact between the tool and the workpiece. The extrusion force is easy to form asymmetric stress concentration in the narrow groove, which causes the body to deviate during machining, and also causes high-frequency vibration. The superposition of the two will directly damage the milling stability, causing quality problems such as fin profile precision out-of-tolerance, surface roughness deterioration, and local overcutting, especially in high-density fin array machining, which is a key technical bottleneck restricting the yield improvement of the production line.

[0003] The existing patent with the publication number CN115255953A discloses a forming device for motor shell hole finishing. By setting a four-axis drilling device and a drill bit first gear transmission structure, the multi-hole synchronous machining function is realized, and the motor shell hole machining efficiency is significantly improved. By adopting an arc-shaped clamping plate matched with the outer shell arc surface, and opening a positioning groove matched with the outer shell protruding rib on the clamping surface, the purpose of preventing the workpiece from rotating during machining is achieved, the hole machining precision and surface quality are effectively guaranteed, and finally the efficiency and stability of the motor shell hole machining are improved.

[0004] The above-mentioned existing technology discloses a technical solution for improving the machining stability of the shell by using an arc-shaped clamping plate, but does not solve the problem of complex tool path and easy deviation and vibration of the workpiece during milling machining of the single milling cutter. SUMMARY

[0005] In view of the above-mentioned existing technology, the technical problem to be solved by the present application is that the single milling cutter of the existing starter motor shell production line has a complex tool path and is easy to cause deviation and vibration of the shell during milling machining.

[0006] To solve the above problems, the application provides an intelligent finishing production line for automobile starter housing, which comprises a conveyor belt; a finishing device is arranged on one side of the conveyor belt, a pair of mechanical arms are arranged on both sides of the finishing device, and the mechanical arms are used for conveying the housing between the conveyor belt and the finishing device; the finishing device comprises a workbench, a fixed frame is fixedly connected to the workbench, a conveying disc is rotatably connected to the fixed frame, a driving mechanism for driving the conveying disc to rotate is connected to the conveying disc, a plurality of electrically controlled clamping seats are fixedly connected to the conveying disc in a circumferentially uniform manner;

[0007] A precision milling mechanism is also fixedly connected to the fixed frame, the precision milling mechanism comprises an annular cylinder arranged outside the housing, a plurality of precision milling cutters are rotatably connected to the annular cylinder and extend to the central cavity of the annular cylinder, the outer ends of the precision milling cutters are fixedly connected to passive gears in the inner cavity of the annular cylinder, the passive gears are engaged with a double-sided gear ring rotatably connected to the annular cylinder, the double-sided gear ring is engaged with a first driving gear on the side away from the passive gears, the first driving gear is fixedly connected to the output shaft of a first motor, and the first motor is fixedly connected to the upper end surface of the annular cylinder; a lifting frame is fixedly connected to the upper end of the annular cylinder, the upper end of the lifting frame is fixedly connected to the movable end of a first hydraulic cylinder, and the fixed end of the first hydraulic cylinder is fixedly connected to the fixed frame.

[0008] In the above-mentioned intelligent finishing production line for automobile starter housing, the circumferentially uniformly distributed precision milling cutters simplify the tool path and reduce the probability of housing deviation and vibration.

[0009] As a further improvement of the application, the precision milling cutter comprises a cutter head part and a cutter shaft part connected to the cutter head part in a spline sleeve connection manner, the cutter head part movably penetrates the annular cylinder and extends to the inside of the central cavity, the end of the cutter shaft part on the inside of the cutter head part is in a prismatic structure, a fixed cylinder is rotatably connected to the end of the cutter shaft part, the fixed cylinder is fixedly connected to the inner wall of the inner cavity of the annular cylinder, and the passive gear is fixedly connected to the cutter shaft part.

[0010] As a further improvement of the application, the cutter head part is in a horizontal circular rod structure, a sleeve ring is rotatably connected to the outer end of the cutter head part, a sliding column is fixedly connected to the lower end of the sleeve ring, a single-sided gear ring is slidingly connected to the sliding column, a plurality of circumferentially uniformly distributed guide grooves are formed in the upper end surface of the single-sided gear ring, the single-sided gear ring is rotatably connected to the inner wall of the annular cylinder, a second driving gear is engaged with the lower end of the single-sided gear ring, the second driving gear extends below the annular cylinder and is fixedly connected to the output shaft of a second motor, and the second motor is fixedly connected to the lower end surface of the annular cylinder.

[0011] As a further improvement of the application, the fixed frame is fixedly connected with a pretreatment mechanism arranged opposite to the fine milling mechanism, the pretreatment mechanism comprises a lifting disc, a rough milling cutter and a polishing roller are arranged below the lifting disc, the rough milling cutter and the polishing roller are both connected with a driving motor, the outer end of the driving motor is fixedly connected with a moving frame, the moving frame is movably connected with a one-way screw rod module installed in the lifting disc, the upper end of the lifting disc is fixedly connected with the output shaft of a rotating motor, the rotating motor is fixedly connected with a lifting cylinder rotatably connected with the lifting disc, the lifting cylinder is fixedly connected with the movable end of a second hydraulic cylinder, and the fixed end of the second hydraulic cylinder is fixedly connected with the fixed frame.

[0012] As a further improvement of the application, the electric control clamping seat comprises a base fixedly connected with the conveying disc, a pair of clamping blocks are slidably connected on the base, the pair of clamping blocks pass through the rotating shaft hole of the front end cover of the shell and abut against the inner wall of the rotating shaft hole, and the pair of clamping blocks are movably connected with a bidirectional screw rod module fixed on the upper part of the base.

[0013] As a further improvement of the application, the base is in a cylindrical structure and its diameter is smaller than the inner diameter of the shell, the clamping block is an arc-shaped block and its outer wall is slidably attached to the inner wall of the rotating shaft hole of the front end cover of the shell, the lower end of the lifting frame is fixedly connected with the fixed end of the electric push rod, and the movable end of the electric push rod is fixedly connected with an abutting disc, which is in a circular truncated cone structure.

[0014] As a further improvement of the application, the outer wall of the tool head part is fixedly connected with a protruding ring matched with the sleeve ring, the protruding ring extends into the sleeve ring and slidably abuts against the inner wall of the sleeve ring, the guide groove is an inclined groove and its cross section is in a convex shape, and the cross section of the sliding column is in an inverted T shape.

[0015] As a further improvement of the application, the center positions of the tool head part and the tool shaft part are both provided with an axial cavity penetrating through itself, the fixed cylinder is a hollow cylinder, the fixed cylinder is fixedly connected with a liquid inlet pipe extending to the outside of the annular cylinder, the outer end of the liquid inlet pipe is fixedly connected with an annular pipe, the annular pipe is fixedly connected with a liquid injection pipe, and the liquid injection pipe is in communication with an external cutting fluid supply pump.

[0016] As a further improvement of the application, in use, the following steps are included:

[0017] Step one, feeding; the mechanical arm on one side of the fine machining device carries the shell conveyed on the conveying belt to the electric control clamping seat, then the electric control clamping seat clamps and fixes the shell, the driving mechanism drives the conveying disc to rotate, so that the shell moves to the lower side of the pretreatment mechanism;

[0018] Step two, pretreatment, including the following sub-steps:

[0019] S1, start the second hydraulic cylinder and the one-way screw rod module above the rough milling cutter, so that the rough milling cutter is attached to the outer wall of the shell, and then close the second hydraulic cylinder and the one-way screw rod module;

[0020] S2, start the driving motor connected with the rough milling cutter and the rotating motor, rotate and mill the outer wall of the shell until the rotating setting number of turns, then close the driving motor connected with the rough milling cutter and the rotating motor, start the one-way screw module above the rough milling cutter again, so that the rough milling cutter is separated from the shell;

[0021] S3, start the one-way screw module and the driving motor above the polishing roller, and start the rotating motor at the same time, rotate and polish the outer wall of the shell until the polishing number of turns reaches the setting number of turns, then close the one-way screw module, the driving motor and the rotating motor above the polishing roller;

[0022] S4, start the one-way screw module above the polishing roller, so that the polishing roller is separated from the shell, and determine the second hydraulic cylinder again, so that the lifting disc returns to the initial position;

[0023] Step three, transfer the station, start the driving mechanism, and drive the pre-processed shell to move below the fine milling mechanism by the conveying disc;

[0024] Step four, heat dissipation fin milling, comprising the following sub-steps:

[0025] A1, start the first hydraulic cylinder, and move the lifting frame with the annular cylinder below the shell; A, start the first motor to make the plurality of fine milling cutters rotate synchronously;

[0026] A2, start the first hydraulic cylinder again, so that the plurality of fine milling cutters vertically and synchronously mill the outer wall of the shell until the shell is milled, then close the first motor, and return the annular cylinder to the initial position by the first hydraulic cylinder;

[0027] Step five, discharging, start the electric control clamping seat to release the shell, and use the mechanical arm on the other side to transport the processed shell to the conveying belt again.

[0028] In summary, the present application comprises a conveying belt, a finishing device, a mechanical arm, a conveying disc and a fine milling mechanism; wherein the fine milling mechanism comprises a plurality of fine milling cutters uniformly distributed in a circle, which synchronously mills the outer wall of the shell, so that the shell is uniformly stressed in the horizontal direction, instead of the traditional way of milling each fin one by one during the processing of the shell heat dissipation fin, reducing the probability of horizontal deviation and vibration of the shell during milling, improving the forming quality and consistency of the heat dissipation fin; at the same time, cooperating with the annular cylinder and the first hydraulic cylinder, the plurality of fine milling cutters uniformly distributed in a circle move from bottom to top, vertically milling the outer wall of the shell, reducing the accumulation of milling debris in the milling groove, further improving the milling quality and forming efficiency, overcoming the problem of complex milling control and low processing efficiency caused by the complex tool path of the traditional single milling cutter; in addition, the preprocessing mechanism comprising a rough milling cutter and a polishing roller further improves the milling quality of the heat dissipation fin. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 This is a top view of the structure of this application;

[0030] Figure 2 This is a three-dimensional structural diagram of the finishing apparatus in this application;

[0031] Figure 3 This is a cross-sectional view of the finishing apparatus in this application;

[0032] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0033] Figure 5 This is a cross-sectional view of the finish milling cutter in this application;

[0034] Figure 6 This is a three-dimensional structural diagram of the precision milling mechanism in this application;

[0035] Figure 7 This is a bottom-view three-dimensional structural diagram of the annular cylinder in this application;

[0036] Figure 8 This is a schematic diagram of the exploded assembly structure of the annular cylinder in this application;

[0037] Figure 9 This is a schematic diagram showing the rotation state of the milling cutter in this application;

[0038] Figure 10 This is a schematic diagram showing the end mill extended outwards in this application;

[0039] Figure 11 for Figure 3 Enlarged structural diagram at point B;

[0040] Figure 12 This is a three-dimensional structural diagram of the pretreatment mechanism in this application.

[0041] Explanation of the labels in the diagram:

[0042] 1. Conveyor belt; 2. Precision machining device; 3. Robotic arm; 4. Housing; 5. Worktable; 6. Fixture; 7. Conveyor plate; 8. Drive mechanism; 9. Electrically controlled clamping seat; 901. Base; 902. Clamping block; 903. Bidirectional lead screw module; 10. Precision milling mechanism; 11. Annular cylinder; 12. Precision milling cutter; 1201. Cutter head; 1202. Cutter shaft; 13. Driven gear; 14. Double-sided gear ring; 15. First drive gear; 16. First motor; 17. Lifting frame; 18. First hydraulic system 19. Cylinder; 20. Abutment plate; 21. Electric push rod; 22. Fixed cylinder; 23. Collar; 24. Sliding column; 25. Single-sided toothed ring; 26. Guide groove; 27. Second drive gear; 28. Second motor; 29. ​​Liquid inlet pipe; 20. Annular pipe; 30. Liquid injection pipe; 31. Pretreatment mechanism; 32. Rough milling cutter; 33. Drive motor; 34. Moving frame; 35. Lifting plate; 36. One-way lead screw module; 37. Rotating motor; 38. Lifting cylinder; 39. Second hydraulic cylinder; 30. Grinding roller. Detailed Implementation

[0043] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0044] Implementation method 1:

[0045] Figures 1-10 A smart precision machining production line for automotive starter housings is shown, comprising a conveyor belt 1; a precision machining device 2 is provided on one side of the conveyor belt 1, and a pair of robotic arms 3 are provided on both sides of the precision machining device 2, the robotic arms 3 being used to transport the housing 4 between the conveyor belt 1 and the precision machining device 2; the precision machining device 2 includes a worktable 5, a fixed frame 6 is fixedly connected to the worktable 5, a conveyor plate 7 is rotatably connected to the fixed frame 6, the conveyor plate 7 is connected to a drive mechanism 8 that drives its rotation, and a plurality of electrically controlled clamping seats 9 uniformly arranged in a circle are fixedly connected to the conveyor plate 7, the electrically controlled clamping seats 9 being used to clamp the housing 4;

[0046] Please see Figures 4-6 The fixed frame 6 is also fixedly connected to a precision milling mechanism 10. The precision milling mechanism 10 includes an annular cylinder 11 sleeved on the outside of the outer shell 4. Multiple precision milling cutters 12 extending to its central cavity are rotatably connected inside the annular cylinder 11. A driven gear 13 located in the inner cavity of the annular cylinder 11 is fixedly connected to the outer end of the precision milling cutter 12. The driven gear 13 meshes with a double-sided toothed ring 14 rotatably connected to the annular cylinder 11. A first drive gear 15 meshes with the side of the double-sided toothed ring 14 away from the driven gear 13. The output shaft of a first motor 16 is fixedly connected to the first drive gear 15. The first motor 16 is fixedly connected to the upper end face of the annular cylinder 11. The first motor 16 drives the double-sided toothed ring 14 to rotate through the first drive gear 15. The double-sided toothed ring 14 drives the multiple precision milling cutters 12 that are evenly distributed in a circle to rotate through the driven gear 13. The multiple precision milling cutters 12 perform synchronous milling on the outer wall of the outer shell 4.

[0047] Please see Figure 3 and Figure 4 A lifting frame 17 is fixedly connected to the upper end of the annular cylinder 11. The movable end of the first hydraulic cylinder 18 is fixedly connected to the upper end of the lifting frame 17. The fixed end of the first hydraulic cylinder 18 is fixedly connected to the fixed frame 6. The first hydraulic cylinder 18 drives the annular cylinder 11 and the milling cutter 12 on it to move up and down through the lifting frame 17 to perform vertical milling on the outer wall of the outer shell 4.

[0048] For details, please refer to Figure 4 and Figure 9 The production line includes the following steps when processing shell 4:

[0049] Step 1, loading; The robotic arm 3 located on one side of the precision machining device 2 transports the outer shell 4 conveyed on the conveyor belt 1 to the electrically controlled clamping seat 9. Then the electrically controlled clamping seat 9 clamps and fixes the outer shell 4. The drive mechanism 8 drives the conveyor plate 7 to rotate, so that the outer shell 4 moves to the bottom of the precision milling mechanism 10.

[0050] Step 2, milling; First, start the first hydraulic cylinder 18, and the lifting frame 17 moves the annular cylinder 11 to below the outer shell 4, then close the first hydraulic cylinder 18; then start the first motor 16, so that multiple milling cutters 12 rotate synchronously; finally, start the first hydraulic cylinder 18 again, so that multiple milling cutters 12 perform vertical synchronous milling on the outer wall of the outer shell 4 until the outer shell 4 is milled, then close the first motor 16, and use the first hydraulic cylinder 18 to return the annular cylinder 11 to its initial position;

[0051] Step 3: Unloading. Start the electric clamping seat 9 to release the outer shell 4, and use the robotic arm 3 on the other side to transport the processed outer shell 4 back onto the conveyor belt 1.

[0052] It should be noted that all electrical structures in this application are electrically connected to the uniform controller.

[0053] Compared to traditional starter housing processing lines, this invention uses multiple circumferentially distributed precision milling cutters 12 to simultaneously mill the outer wall of the housing 4, ensuring uniform force distribution in the horizontal direction. This replaces the traditional method of milling heat dissipation fins one by one with milling cutters, reducing the probability of horizontal deviation and vibration during milling and improving the forming quality and consistency of the heat dissipation fins. Simultaneously, in conjunction with the annular cylinder 11 and the first hydraulic cylinder 18, the multiple circumferentially distributed precision milling cutters 12 move from bottom to top to perform vertical milling on the outer wall of the housing 4, reducing the accumulation of milling debris in the milling groove, further improving milling quality and forming efficiency, and overcoming the problems of complex milling control and low processing efficiency caused by the complex tool path of traditional single milling cutters.

[0054] Please see Figure 4The electrically controlled clamping base 9 includes a base 901 fixedly connected to the conveyor plate 7. A pair of clamping blocks 902 are slidably connected to the base 901. The pair of clamping blocks 902 pass through the pivot hole of the front cover of the outer shell 4 and abut against the inner wall of the pivot hole. A bidirectional lead screw module 903 fixed on the upper part of the base 901 is movably connected to the pair of clamping blocks 902.

[0055] Specifically, the bidirectional lead screw module 903 drives a pair of clamping blocks 902 to move away, causing the clamping blocks 902 to abut against the inner wall of the pivot hole of the front cover of the outer shell 4, thus clamping the outer shell 4; when the pair of clamping blocks 902 move closer, the clamping blocks 902 disengage from the pivot hole and release the outer shell 4; it should be noted that the bidirectional lead screw module 903 includes a bidirectional lead screw threadedly connected to a pair of clamping blocks 902 and a lead screw motor connected to the bidirectional lead screw through a transmission gear set. The bidirectional lead screw module 903 is prior art and will not be described in detail in this application.

[0056] Please see Figure 4 and Figure 6 The base 901 has a cylindrical structure and its diameter is smaller than the inner diameter of the outer shell 4. The clamping block 902 is an arc-shaped block and its outer wall slides against the inner wall of the pivot hole of the front cover of the outer shell 4. The lower end of the lifting frame 17 is fixedly connected to the fixed end of the electric push rod 20. The movable end of the electric push rod 20 is fixedly connected to the abutment plate 19, which has a frustum-shaped structure.

[0057] Specifically, during the milling of the heat dissipation fins, the electric push rod 20 drives the abutment plate 19 to abut against the opening at the tail end of the outer shell 4, and cooperates with the electric control clamping seat 9 to vertically clamp the outer shell 4, counteracting the squeezing force of the milling cutter 12 on the outer shell 4, and further improving the stability of the outer shell 4 during milling.

[0058] Please see Figure 4 and Figure 5 The precision milling cutter 12 includes a cutter head 1201 and a cutter shaft 1202 connected to it via a spline connection. The cutter head 1201 movably passes through the annular cylinder 11 and extends into its central cavity. The end of the cutter shaft 1202 located inside the cutter head 1201 has a prismatic structure. A fixed cylinder 21 is rotatably connected to the end of the cutter shaft 1202. The fixed cylinder 21 is fixedly connected to the inner wall of the annular cylinder 11. The driven gear 13 is fixedly connected to the cutter shaft 1202.

[0059] Specifically, the double-sided gear ring 14 drives the cutter shaft 1202 to rotate via the driven gear 13, and the cutter shaft 1202 drives the cutter head 1201 to rotate.

[0060] Please see Figure 4 and Figure 5The cutter head 1201 has a horizontal cylindrical structure. A collar 22 is rotatably connected to the outer end of the cutter head 1201. A sliding column 23 is fixedly connected to the lower end of the collar 22. A single-sided toothed ring 24 is slidably connected to the sliding column 23. Multiple circumferentially evenly distributed guide grooves 2401 are opened on the upper end surface of the single-sided toothed ring 24. The single-sided toothed ring 24 is rotatably connected to the inner wall of the annular cylinder 11. A second drive gear 25 is meshed at the lower end of the single-sided toothed ring 24. The second drive gear 25 extends to the lower part of the annular cylinder 11 and is fixedly connected to the output shaft of the second motor 26. The second motor 26 is fixedly connected to the lower end surface of the annular cylinder 11.

[0061] For details, please refer to Figure 9 When the single-sided toothed ring 24 rotates, the guide groove 2401 presses against the sliding column 23, and the sliding column 23 drives the cutter head 1201 to move in the radial direction of the annular cylinder 11, changing the extension length of the cutter head 1201 to adapt to the processing requirements of different specifications of the outer shell 4. It should be noted that the double-sided toothed ring 14 refers to a ring with teeth on both its upper and lower ends. Similarly, the single-sided toothed ring 24 refers to a ring with teeth on its lower end.

[0062] Please see Figure 5 A raised ring that mates with the collar 22 is fixedly connected to the outer wall of the cutter head 1201. The raised ring extends into the collar 22 and slides against the inner wall of the collar 22. The guide groove 2401 is an inclined groove with a convex cross-section. The sliding column 23 has an inverted T-shaped cross-section.

[0063] Specifically, when the sliding column 23 with an inverted T-shaped cross section slides in the guide groove 2401, it is vertically and horizontally limited by the guide groove 2401, thereby improving the stability of the movement of the cutter head 1201.

[0064] Please see Figure 4 and Figure 5 Both the cutter head 1201 and the cutter shaft 1202 have an axial cavity that penetrates through them at their center. The fixed cylinder 21 is a hollow cylinder. The fixed cylinder 21 is fixedly connected to a liquid inlet pipe 27 that extends to the outside of the annular cylinder 11. The outer end of the liquid inlet pipe 27 is fixedly connected to an annular pipe 28. The annular pipe 28 is fixedly connected to an injection pipe 29. The injection pipe 29 is connected to an external cutting fluid supply pump.

[0065] Specifically, when the finish milling cutter 12 is performing milling operations, the external cutting fluid supply pump injects cutting fluid into the fixed cylinder 21 through the injection pipe 29, the annular pipe 28, and the inlet pipe 27. Then, the cutting fluid flows from the fixed cylinder 21 into the central cavity of the cutter shaft 1202, and then the cutting fluid is discharged into the milling groove through the central cavity of the cutter head 1201. This provides sufficient cooling for the finish milling cutter 12 and, in conjunction with the vertical milling feed method, thoroughly flushes and cleans the chips in the milling groove, further improving the chip removal effect.

[0066] The second implementation method:

[0067] Figure 3 , Figure 11 and Figure 12 This invention discloses an intelligent precision machining production line for automotive starter housings. Based on the first embodiment, a pre-processing mechanism 30 is fixedly connected to the fixed frame 6, which is arranged opposite to the precision milling mechanism 10. The pre-processing mechanism 30 includes a lifting plate 34. A rough milling cutter 31 and a grinding roller 39 are provided below the lifting plate 34. Both the rough milling cutter 31 and the grinding roller 39 are connected to a drive motor 32. A movable frame 33 is fixedly connected to the outer end of the drive motor 32. A one-way lead screw module 35 installed in the lifting plate 34 is movably connected to the movable frame 33. The output shaft of a rotary motor 36 is fixedly connected to the upper end of the lifting plate 34. The rotary motor 36 is fixedly connected to a lifting cylinder 37 that is rotatably connected to the lifting plate 34. The movable end of a second hydraulic cylinder 38 is fixedly connected to the lifting cylinder 37. The fixed end of the second hydraulic cylinder 38 is fixedly connected to the fixed frame 6.

[0068] For details, please refer to Figure 2 , Figure 9 and Figure 10 The following steps are included when using it:

[0069] Step 1, loading; The robotic arm 3 located on one side of the finishing device 2 transports the outer shell 4 conveyed on the conveyor belt 1 to the electrically controlled clamping seat 9. Then the electrically controlled clamping seat 9 clamps and fixes the outer shell 4. The drive mechanism 8 drives the conveyor plate 7 to rotate, so that the outer shell 4 moves to the bottom of the pre-processing mechanism 30.

[0070] Step two, preprocessing, includes the following sub-steps:

[0071] S1, start the second hydraulic cylinder 38 and the one-way screw module 35 above the rough milling cutter 31, so that the rough milling cutter 31 fits against the outer wall of the housing 4, and close the second hydraulic cylinder 38 and the one-way screw module 35;

[0072] S2, start the drive motor 32 and the rotary motor 36 connected to the rough milling cutter 31 to perform rotary milling on the outer wall of the housing 4 until the set number of rotations is reached. Then, turn off the drive motor 32 and the rotary motor 36 connected to the rough milling cutter 31 and start the one-way lead screw module 35 above the rough milling cutter 31 again to make the rough milling cutter 31 detach from the housing 4.

[0073] S3, start the one-way screw module 35 and drive motor 32 above the grinding roller 39, and at the same time start the rotation motor 36 to rotate and grind the outer wall of the outer shell 4 until the number of grinding revolutions reaches the set number of revolutions, and then turn off the one-way screw module 35, drive motor 32 and rotation motor 36 above the grinding roller 39.

[0074] S4, activate the one-way screw module 35 above the grinding roller 39 to disengage the grinding roller 39 from the housing 4, and re-activate the second hydraulic cylinder 38 to return the lifting plate 34 to its initial position.

[0075] Step 3: Transfer station, start drive mechanism 8, and the conveyor plate 7 moves the pre-treated outer shell 4 to below the milling mechanism 10;

[0076] Step four, milling of heat dissipation fins, includes the following sub-steps:

[0077] A1, start the first hydraulic cylinder 18, and the lifting frame 17 drives the annular cylinder 11 to move below the outer shell 4;

[0078] A2, start the first motor 16 to make multiple milling cutters 12 rotate synchronously;

[0079] A3, restart the first hydraulic cylinder 18, so that multiple milling cutters 12 perform vertical synchronous milling on the outer wall of the outer shell 4 until the outer shell 4 is milled. Then, turn off the first motor 16 and use the first hydraulic cylinder 18 to return the annular cylinder 11 to the initial position.

[0080] Step 5: Unloading. Start the electric clamping seat 9 to release the outer shell 4, and use the robotic arm 3 on the other side to transport the processed outer shell 4 back onto the conveyor belt 1.

[0081] Compared to traditional starter housing processing lines, this invention uses a pre-processing mechanism 30, including a rough milling cutter 31 and a grinding roller 39, to mill and grind the outer wall of the housing 4. This cleans and removes protrusions and milling burrs from the outer wall of the rough housing blank, facilitating subsequent fine milling operations, further improving the forming quality of the heat dissipation fins, and reducing the impact of protrusions and burrs on the outer wall of the housing 4 on the forming process. At the same time, a one-way lead screw module 35 is provided to adjust the position of the rough milling cutter 31 and the grinding roller 39, thereby adjusting the radial depth of the rough milling and grinding.

[0082] Please see Figure 11 and Figure 12 The lifting plate 34 has a disc-shaped structure. A pair of radial grooves that coincide with its radial direction are opened at the lower end of the lifting plate 34. The moving frame 33 extends into the radial grooves and slides against its inner wall. The one-way screw module 35 includes a one-way screw threadedly connected to the moving frame 33 and a screw motor fixedly connected to the end of the one-way screw. The screw motor is fixedly connected to the lifting plate 34.

[0083] Specifically, the lead screw motor drives the unidirectional lead screw to rotate, and the unidirectional lead screw drives the moving frame 33 to move within the radial groove, changing the position of the rough milling cutter 31 and the grinding roller 39.

[0084] It should be noted that, in this field, the roughing cutter 31 and the finishing cutter 12 are existing components. Generally, the number of cutting edges and the rotation speed of the finishing cutter 12 are greater than those of the roughing cutter 31. This is prior art. Those skilled in the art can select the appropriate specifications of the roughing cutter 31 and the finishing cutter 12 as needed. This application will not elaborate further.

[0085] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. A smart precision machining production line for automotive starter motor housings, characterized in that, Includes a conveyor belt (1); a finishing device (2) is provided on one side of the conveyor belt (1), and a pair of robotic arms (3) are provided on both sides of the finishing device (2). The robotic arms (3) are used to transport the outer shell (4) between the conveyor belt (1) and the finishing device (2); the finishing device (2) includes a worktable (5), a fixed frame (6) is fixedly connected to the worktable (5), a conveyor plate (7) is rotatably connected to the fixed frame (6), the conveyor plate (7) is connected to a drive mechanism (8) that drives it to rotate, and multiple electrically controlled clamping seats (9) are fixedly connected to the conveyor plate (7) in a circumferentially uniform manner. The fixed frame (6) is also fixedly connected to a precision milling mechanism (10). The precision milling mechanism (10) includes an annular cylinder (11) sleeved on the outside of the outer shell (4). Multiple precision milling cutters (12) extending to its central cavity are rotatably connected inside the annular cylinder (11). A passive gear (13) located in the inner cavity of the annular cylinder (11) is fixedly connected to the outer end of the precision milling cutter (12). The passive gear (13) meshes with a double-sided toothed ring (14) rotatably connected to the annular cylinder (11). A first drive gear (15) meshes with the side of the double-sided toothed ring (14) away from the passive gear (13). The output shaft of a first motor (16) is fixedly connected to the first drive gear (15). The first motor (16) is fixedly connected to the upper end face of the annular cylinder (11). A lifting frame (17) is fixedly connected to the upper end of the annular cylinder (11). The movable end of a first hydraulic cylinder (18) is fixedly connected to the upper end of the lifting frame (17). The fixed end of the first hydraulic cylinder (18) is fixedly connected to the fixed frame (6). The milling cutter (12) includes a cutter head (1201) and a cutter shaft (1202) connected to it by a spline connection. The cutter head (1201) moves through the annular cylinder (11) and extends into its central cavity. The end of the cutter shaft (1202) located inside the cutter head (1201) has a prismatic structure. The end of the cutter shaft (1202) is rotatably connected to a fixed cylinder (21). The fixed cylinder (21) is fixedly connected to the inner wall of the annular cylinder (11). The driven gear (13) is fixedly connected to the cutter shaft (1202). The cutter head (1201) has a horizontal cylindrical rod structure. A collar (22) is rotatably connected to the outer end of the cutter head (1201). A sliding column (23) is fixedly connected to the lower end of the collar (22). A single-sided toothed ring (24) is slidably connected to the sliding column (23). A number of circumferentially evenly distributed guide grooves (2401) are opened on the upper end surface of the single-sided toothed ring (24). The single-sided toothed ring (24) is rotatably connected to the inner wall of the annular cylinder (11). A second drive gear (25) is meshed at the lower end of the single-sided toothed ring (24). The second drive gear (25) extends to the lower part of the annular cylinder (11) and is fixedly connected to the output shaft of the second motor (26). The second motor (26) is fixedly connected to the lower end surface of the annular cylinder (11). The outer wall of the cutter head (1201) is fixedly connected to a protruding ring that cooperates with the collar (22). The protruding ring extends into the collar (22) and slides against the inner wall of the collar (22). The guide groove (2401) is an inclined groove with a convex cross-section, and the cross-section of the sliding column (23) is an inverted T-shape.

2. The intelligent precision machining production line for automotive starter motor housing according to claim 1, characterized in that, The fixed frame (6) is fixedly connected to a pre-processing mechanism (30) which is opposite to the fine milling mechanism (10). The pre-processing mechanism (30) includes a lifting plate (34). A rough milling cutter (31) and a grinding roller (39) are provided below the lifting plate (34). Both the rough milling cutter (31) and the grinding roller (39) are connected to a drive motor (32). A movable frame (33) is fixedly connected to the outer end of the drive motor (32). A one-way screw module (35) installed in the lifting plate (34) is movably connected to the movable frame (33). The upper end of the lifting plate (34) is fixedly connected to the output shaft of a rotating motor (36). The rotating motor (36) is fixedly connected to a lifting cylinder (37) which is rotatably connected to the lifting plate (34). The lifting cylinder (37) is fixedly connected to the movable end of a second hydraulic cylinder (38). The fixed end of the second hydraulic cylinder (38) is fixedly connected to the fixed frame (6).

3. The intelligent precision machining production line for automotive starter motor housing according to claim 1, characterized in that, The electrically controlled clamping base (9) includes a base (901) fixedly connected to the conveyor plate (7), a pair of clamping blocks (902) are slidably connected on the base (901), the pair of clamping blocks (902) penetrate the pivot hole of the front end cover of the outer shell (4) and abut against the inner wall of the pivot hole, and the pair of clamping blocks (902) are movably connected to a bidirectional lead screw module (903) fixed on the upper part of the base (901).

4. The intelligent precision machining production line for automotive starter motor housing according to claim 3, characterized in that, The base (901) has a cylindrical structure and its diameter is smaller than the inner diameter of the outer shell (4). The clamping block (902) is an arc-shaped block and its outer wall slides against the inner wall of the pivot hole of the front cover of the outer shell (4). The lower end of the lifting frame (17) is fixedly connected to the fixed end of the electric push rod (20). The movable end of the electric push rod (20) is fixedly connected to the abutment plate (19), which has a frustum-shaped structure.

5. The intelligent precision machining production line for automotive starter motor housing according to claim 1, characterized in that, The center of both the cutter head (1201) and the cutter shaft (1202) is provided with an axial cavity that penetrates itself. The fixed cylinder (21) is a hollow cylinder. The fixed cylinder (21) is fixedly connected to a liquid inlet pipe (27) extending to the outside of the annular cylinder (11). The outer end of the liquid inlet pipe (27) is fixedly connected to an annular pipe (28). The annular pipe (28) is fixedly connected to an injection pipe (29). The injection pipe (29) is connected to an external cutting fluid supply pump.

6. The intelligent precision machining production line for automotive starter motor housing according to claim 2, characterized in that, The following steps are included when using it: Step 1, loading; The robotic arm (3) located on one side of the finishing device (2) transports the shell (4) conveyed on the conveyor belt (1) to the electric clamping seat (9), and then the electric clamping seat (9) clamps and fixes the shell (4). The drive mechanism (8) drives the conveyor plate (7) to rotate, so that the shell (4) moves to the bottom of the pre-processing mechanism (30). Step two, preprocessing, includes the following sub-steps: S1, start the second hydraulic cylinder (38) and the one-way screw module (35) above the rough milling cutter (31) so that the rough milling cutter (31) fits against the outer wall of the housing (4), and close the second hydraulic cylinder (38) and the one-way screw module (35). S2, start the drive motor (32) and the rotary motor (36) connected to the rough milling cutter (31) to perform rotary milling on the outer wall of the housing (4) until the set number of rotations is reached. Then, turn off the drive motor (32) and the rotary motor (36) connected to the rough milling cutter (31) and start the one-way lead screw module (35) above the rough milling cutter (31) again to make the rough milling cutter (31) detach from the housing (4). S3, start the one-way screw module (35) and drive motor (32) above the grinding roller (39), and start the rotation motor (36) at the same time to rotate and grind the outer wall of the outer shell (4) until the number of grinding revolutions reaches the set number of revolutions, and then turn off the one-way screw module (35), drive motor (32) and rotation motor (36) above the grinding roller (39). S4, start the one-way screw module (35) above the grinding roller (39) so that the grinding roller (39) is disengaged from the housing (4), and the second hydraulic cylinder (38) is activated again so that the lifting plate (34) returns to the initial position; Step 3: Transfer station, start drive mechanism (8), and the conveyor plate (7) drives the pre-treated shell (4) to move below the milling mechanism (10); Step four, milling of heat dissipation fins, includes the following sub-steps: A1, start the first hydraulic cylinder (18), and the lifting frame (17) drives the annular cylinder (11) to move below the outer shell (4); A2, start the first motor (16) so that multiple milling cutters (12) rotate synchronously; A2, restart the first hydraulic cylinder (18) to make multiple milling cutters (12) perform vertical synchronous milling on the outer wall of the outer shell (4) until the outer shell (4) is milled. Then turn off the first motor (16) and use the first hydraulic cylinder (18) to make the annular cylinder (11) return to the initial position. Step 5: Unload the material and start the electric clamping seat (9) to release the shell (4). Use the robotic arm (3) on the other side to transport the processed shell (4) back to the conveyor belt (1).

Images