Busbar batch drilling device

Abstract

The application discloses a bus batch drilling device and relates to the technical field of bus drilling equipment, which comprises a workbench, the upper wall of which is fixedly provided with a guide frame, a driving frame is slidably connected above the guide frame, and the upper wall of the workbench is rotatably connected with a positioning frame; a transmission box is fixedly arranged in the driving frame, a partition plate is fixedly arranged in the transmission box, a guide sliding groove is formed in the center of the partition plate, a clearance groove corresponding to the guide sliding groove is formed in the bottom wall of the transmission box, two sliders that can relatively move are slidably connected in the guide sliding groove, and the lower wall of the slider is rotatably connected with a tool shank. The two drill bits are symmetrically arranged, and the two drill bits synchronously feed drilling from the two sides of a workpiece. In the machining process, the axial cutting forces generated on the two sides are mutually counteracted in the workpiece, the workpiece only bears a small radial force perpendicular to the plate surface, and the inducement of "tool following" and bending deformation is eliminated.

Description

Technical Field

[0001] This invention relates to the field of busbar drilling equipment technology, specifically a busbar batch drilling device. Background Technology

[0002] Copper busbars are commonly used as the core conductive component for current transmission in switchgear. Among them, rectangular copper busbars are the most widely used busbar type due to their simple processing, convenient installation, and stable current carrying capacity. In recent years, rectangular copper busbars have been widely used to optimize current carrying efficiency and reduce material costs. By drilling holes in the traditional rectangular busbar, the amount of copper used can be significantly reduced while ensuring current carrying capacity and temperature rise requirements. This makes the busbar specifications more closely match actual current needs and has significant economic value. Currently, the drilling of busbar copper busbars mostly uses traditional single-drill-bit drilling equipment. However, this type of equipment has the following problems in practical applications.

[0003] First, when drilling with a single drill bit, the workpiece is subjected to a unidirectional axial force, which easily leads to "following" and bending deformation, especially for thin, soft copper busbars, where the deformation problem is more pronounced. To overcome this problem, existing equipment must be equipped with complex hydraulic or pneumatic clamping mechanisms for multi-point fixation, which not only significantly increases equipment costs and floor space but also increases operational complexity and maintenance difficulty, and still cannot fundamentally eliminate the deformation risk caused by unidirectional force.

[0004] Secondly, existing equipment generally suffers from low automation and discontinuous clamping processes in its workpiece clamping methods. Most equipment requires operators to manually tighten clamping bolts or activate clamping cylinders, which not only increases labor intensity but also prolongs auxiliary time.

[0005] Third, in order to improve processing efficiency, some existing technologies have attempted to adopt multi-drill bit structures with adjustable tool spacing, but they generally suffer from difficulties in tensioning the transmission with variable center distance. When adjusting the tool spacing to meet the hole spacing requirements of different specifications of busbars, the tension of the transmission belt will fluctuate drastically, which can easily lead to slippage and tooth skipping, resulting in inconsistent rotational speeds of the two drill bits, large deviations in drilling depth and diameter, and inconsistent drilling quality.

[0006] In addition, almost all existing equipment adopts a single-station operation mode. During the loading, unloading and chip removal processes, the equipment is completely idle, the auxiliary time is long, the equipment utilization rate is extremely low, and it is difficult to meet the needs of mass production of busbars. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a busbar batch drilling device, which solves the technical problems of existing devices.

[0008] To achieve the above objectives, the present invention provides the following technical solution: A busbar batch drilling device, comprising: A workbench has a guide frame fixedly installed on its upper wall, a drive frame slidably connected above the guide frame, and a positioning frame rotatably connected to the upper wall of the workbench. A transmission box is fixedly installed inside the drive frame. A partition plate is fixedly installed inside the transmission box. A guide groove is opened in the center of the partition plate. An anti-cavity groove corresponding to the guide groove is opened on the bottom wall of the transmission box. Two relatively movable sliders are slidably connected inside the guide groove. A tool holder is rotatably connected to the lower wall of the slider. A drive assembly is connected to the outside of the tool holder through a belt drive. A drill bit is connected to the lower end of the tool holder. Two guide sleeves are fixedly installed on the upper wall of the positioning frame. The bottom wall of the guide sleeve is provided with a stepped through hole, and the large end of the stepped through hole communicates with the inner cavity of the guide sleeve. The upper wall of the worktable is provided with a drive groove corresponding to the transmission box. A pusher table driven by a servo electric actuator is fixedly installed at the center of the bottom wall of the drive groove. The pusher table is plugged into and adapted to the small hole end of the stepped through hole. Two outer smooth tensioning wheels are fixedly installed on the bottom wall of the transmission box, symmetrically arranged on both sides below the drive wheel of the drive assembly.

[0009] Preferably, two lead screw adapter frames are fixedly installed on the upper wall of the partition plate, respectively located at both ends of the guide slide groove. A bidirectional lead screw is rotatably connected inside the lead screw adapter frame. The bidirectional lead screw meshes with two sliders respectively. A driven bevel tooth is fixedly installed at the center of the bidirectional lead screw. An adjusting motor is fixedly installed on the upper wall of the partition plate. A driving bevel tooth that meshes with the driven bevel tooth is fixedly installed at the drive end of the adjusting motor.

[0010] Preferably, the drive assembly includes: a drive motor, the drive end of which is connected to a gearbox; two slide rails are fixedly installed on the lower wall of the gearbox; a track groove adapted to the slide rails is opened on the bottom wall of the transmission box; a tension spring is fixedly installed between the gearbox and the inner side wall of the transmission box; the sliding direction of the gearbox is perpendicular to the moving direction of the tool holder; three toothed drive wheels are respectively fixedly installed on the tail ends of the two tool holders and the output end above the gearbox; a toothed drive belt is sleeved on the three toothed drive wheels and meshes with the toothed drive wheels; the outer side of the toothed drive belt is always in contact with the two outer smooth tension wheels.

[0011] Preferably, a pressure sensor is fixedly installed on the side wall of the gearbox away from the tension spring, and an adjusting push rod driven by a servo electric cylinder is fixedly installed on the inner side wall of the transmission box opposite to the tension spring. As the tension spring contracts or stretches, the pressure sensor detects the pressure change, and the adjusting push rod automatically extends or retracts to supplement or release the tension of the toothed transmission belt.

[0012] Preferably, a rotating sleeve is rotatably connected to the outer wall of the handle, the rotating sleeve is slidably adapted to the anti-cavity groove, and a corrugated anti-splash cover is slidably connected between the rotating sleeve and the anti-cavity groove.

[0013] Preferably, a locking groove is provided at the end of the worktable away from the guide frame, and a locking plate is slidably connected in the locking groove along the height direction. A conical limiting pin is fixedly installed on the upper wall of the locking plate, and two sets of conical pin holes that are adapted to be inserted into the lower wall of the positioning frame are provided. The two sets of conical pin holes are symmetrically distributed at both ends of the positioning frame.

[0014] Preferably, two limiting blocks are fixedly installed at the upper end of the locking groove, a snap-fit ​​groove adapted to engage with the limiting blocks is provided on the upper wall of the locking plate, and a return spring is fixedly installed between the lower wall of the locking plate and the bottom wall of the locking groove.

[0015] Preferably, a clamping assembly is slidably connected to the guide frame. The clamping assembly includes: a sliding plate, wherein a limiting groove adapted to the sliding of the sliding plate is provided on the wall of the guide frame near the locking groove, and the sliding plate is threadedly connected to the guide frame; a pull plate, fixedly installed at one end of the sliding direction of the sliding plate for pulling the sliding plate; a drill template, wherein a drill sleeve is fixedly installed at its center and fixedly connected to the lower wall of the sliding plate by a spring rod; and two guide plates, fixedly installed on the two side walls of the drill template in the insertion direction and forming an inclination angle with the drill template.

[0016] Preferably, the guide frame, sliding plate, and pusher table are all provided with tool clearance grooves.

[0017] Preferably, the guide sleeve has an auxiliary groove on its side wall, which makes it easier to pick up the busbar copper busbar when the height of the busbar copper busbar is lower than that of the guide sleeve.

[0018] This invention provides a busbar batch drilling device, which has the following beneficial effects: This invention employs a symmetrical arrangement of two drill bits, which simultaneously feed and drill from both sides of the workpiece. During machining, the axial cutting forces generated on both sides cancel each other out inside the workpiece, leaving the workpiece with only a small radial force perpendicular to the surface. This eliminates the causes of "follow-the-tool" and bending deformation from a mechanical perspective. This significantly reduces the rigidity requirements of the clamping mechanism, eliminating the need for complex hydraulic or pneumatic clamping systems to ensure machining accuracy. It is particularly suitable for high-quality drilling of thin-walled, soft copper busbars.

[0019] In this invention, during the rotation of the positioning frame, the upper surface of the workpiece contacts an angled guide plate. The horizontal displacement of the rotational motion is converted into the vertical lifting of the drill template. The spring rod is compressed and an elastic preload is established, automatically pressing the workpiece onto the pusher table before processing begins. During the drilling feed stage, the drill template applies a constant elastic clamping force to the workpiece via the spring rod, effectively preventing the workpiece from moving with the drill bit as the pusher table rises. This seamless transition from pre-clamping to continuous clamping ensures the workpiece remains reliably constrained throughout the entire processing cycle, further reducing reliance on additional clamping mechanisms.

[0020] This invention uses a tension spring as a passive buffer layer to absorb tension fluctuations caused by changes in tool distance; a pressure sensor monitors changes in the spring force in real time and feeds back to the adjustment push rod driven by the servo electric cylinder to achieve active tension compensation; two symmetrically arranged outer smooth tension wheels apply constraints from the outside of the transmission belt, forming a three-level differential constant tension tensioning mechanism: no matter how the tool distance changes, the wrap angle of the drive wheel is always locked at the most suitable angle, greatly reducing the possibility of tooth skipping from a geometrical perspective.

[0021] This invention determines the cross-sectional area of ​​a rectangular busbar by calculating the actual required current carrying capacity, and then drills out irregularly shaped busbars of different specifications through a drilling process, thereby achieving both the goal of meeting the current carrying capacity requirement and reducing the corresponding cross-sectional area, thus reducing costs.

[0022] This invention utilizes guide sleeves symmetrically positioned at both ends of the positioning frame, enabling parallel processing and loading / unloading operations through rotational switching. When one station is in drilling mode, the other station can simultaneously complete finished product removal and blank loading, reducing equipment downtime. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the drilling process of the present invention; Figure 3 This is a schematic diagram of the connection structure of the worktable, guide frame, and locking plate of the present invention. Figure 4 This is a schematic diagram of the drive component structure of the present invention; Figure 5 This is a schematic diagram of the connection structure of the sliding plate and the drilling template of the present invention; Figure 6 This is a schematic diagram of the positioning frame and the pusher platform of the present invention; Figure 7 This is a schematic diagram of the busbar copper bus after drilling according to the present invention.

[0024] In the diagram: 1. Workbench; 2. Guide frame; 3. Drive frame; 4. Positioning frame; 5. Transmission box; 6. Divider plate; 7. Guide groove; 8. Clearance groove; 9. Slider; 10. Tool holder; 11. Drill bit; 12. Guide sleeve; 13. Stepped through hole; 14. Drive groove; 15. Pusher table; 16. Outer smooth tension wheel; 17. Lead screw adapter frame; 18. Double-acting lead screw; 19. Driven bevel gear; 20. Adjusting motor; 21. Drive bevel gear; 22. Drive motor; 23. Gearbox; 24. Slide rail; 25. Rail 26. Slide groove; 27. Tension spring; 28. Toothed drive wheel; 29. ​​Toothed drive belt; 30. Pressure sensor; 31. Adjusting push rod; 32. Rotating sleeve; 33. Corrugated splash guard; 34. Locking groove; 35. Locking plate; 36. Conical limit pin; 37. Conical pin hole; 38. Limiting block; 39. Snap-fit ​​groove; 40. Return spring; 41. Sliding plate; 42. Limiting groove; 43. Pull plate; 44. Drill template; 45. Drill sleeve; 46. Spring rod; 47. Guide plate; 48. Tool clearance groove; 49. Auxiliary groove. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0026] Please see Figures 1-6 A busbar batch drilling device, comprising: Workbench 1, with guide frame 2 fixedly installed on its upper wall, drive frame 3 slidably connected above guide frame 2, and positioning frame 4 rotatably connected to the upper wall of workbench 1; A transmission box 5 is fixedly installed inside the drive frame 3 (a servo electric cylinder is connected between the drive frame 3 and the worktable 1 to drive the drive frame 3 to rise and fall; a guide rod is fixedly installed on the top of the guide frame 2, and the telescopic end of the guide rod is fixedly connected to the drive frame 3 to guide the drive frame 3 to rise and fall along the guide frame 2, while increasing the vertical movement strength; the lifting servo electric cylinder has a locking mode, which automatically locks the piston rod position after the drive frame 3 falls to the position to withstand the reaction force during drilling). A partition plate 6 is fixedly installed inside the transmission box 5. A guide groove 7 is opened in the center of the partition plate 6. A clearance groove 8 corresponding to the guide groove 7 is opened on the bottom wall of the transmission box 5. Two relatively movable sliders 9 are slidably connected in the guide groove 7. The lower wall of the slider 9 is rotatably connected to the tool holder 10. The tool holder 10 is connected to the drive assembly through belt drive. The lower end of the tool holder 10 is connected to the drill bit 11. Two guide sleeves 12 are fixedly installed on the upper wall of the positioning frame 4. A stepped through hole 13 is opened on the bottom wall of the guide sleeve 12, and the large hole end of the stepped through hole 13 is connected to the inner cavity of the guide sleeve 12. The upper wall of the worktable 1 is provided with a drive groove 14 corresponding to the transmission box 5. A pusher table 15 driven by a servo electric actuator is fixedly installed at the center of the bottom wall of the drive groove 14 (the servo electric actuator has a built-in displacement sensor for real-time feedback of the lifting stroke of the pusher table 15). The pusher table 15 is plugged into the small hole end of the stepped through hole 13. Two outer smooth tensioning wheels 16 are fixedly installed on the bottom wall of the transmission box 5, symmetrically arranged on both sides below the drive wheel of the drive assembly.

[0027] In use, the workbench 1 provides a stable mounting base for the entire drilling device, the guide frame 2 provides rigid support and guiding reference for the vertical lifting of the drive frame 3, and the positioning frame 4 adopts a half-circle rotation dual-station structure to realize parallel operation of loading and unloading and drilling processing, eliminate auxiliary waiting time, and greatly improve production efficiency.

[0028] Two lead screw adapter frames 17 are fixedly installed on the upper wall of the partition plate 6, located at both ends of the guide slide groove 7 respectively. A bidirectional lead screw 18 is rotatably connected inside the lead screw adapter frame 17. The bidirectional lead screw 18 meshes with the two sliders 9 respectively. A driven bevel gear 19 is fixedly installed at the center of the bidirectional lead screw 18. An adjusting motor 20 is fixedly installed on the upper wall of the partition plate 6. A driving bevel gear 21 that meshes with the driven bevel gear 19 is fixedly installed at the drive end of the adjusting motor 20.

[0029] In use, the adjusting motor 20 provides precise driving power for tool distance adjustment. Through the meshing transmission of the driven bevel gear 21 and the driven bevel gear 19, it drives the bidirectional lead screw 18 to rotate in the lead screw adapter 17. The bidirectional lead screw 18 drives the two sliders 9 to move synchronously relative to each other along the guide groove 7, thereby driving the two tool holders 10 and the drill bit 11 to move closer or further away synchronously, realizing stepless precise adjustment of the center distance between the two drill bits 11, adapting to the busbar copper busbar processing requirements of different hole distances. The rotating sleeve 31 on the outer wall of the tool holder 10 slides synchronously along the clearance groove 8 with the tool holder 10, providing radial support for the horizontal movement of the tool holder 10 and preventing the tool holder 10 from shaking when rotating at high speed. The corrugated splash guard 32 between the rotating sleeve 31 and the clearance groove 8 can adaptively extend and retract with the movement of the rotating sleeve 31, forming a fully enclosed protection for the clearance groove 8, preventing the chips and coolant generated during the drilling process from entering the transmission box 5, protecting the internal transmission components from contamination, and extending the service life of the equipment.

[0030] The drive assembly includes a drive motor 22, the drive end of which is connected to a gearbox 23. Two slide rails 24 are fixedly installed on the lower wall of the gearbox 23. The bottom wall of the transmission box 5 is provided with a track groove 25 that is adapted to the slide rails 24. A tension spring 26 is fixedly installed between the gearbox 23 and the inner side wall of the transmission box 5. The sliding direction of the gearbox 23 is perpendicular to the moving direction of the tool holder 10. Three toothed drive wheels 27 are respectively fixedly installed at the tail ends of the two tool holders 10 and at the output end above the gearbox 23; The toothed drive belt 28 is fitted on three toothed drive pulleys 27 and meshes with them. The outer side of the toothed drive belt 28 is always in contact with the two outer smooth tension pulleys 16.

[0031] A pressure sensor 29 is fixedly installed on the side wall of the gearbox 23 away from the tension spring 26. A servo-driven adjusting push rod 30 is fixedly installed on the inner side wall of the transmission box 5 opposite to the tension spring 26 (the telescopic end of the adjusting push rod 30 is set opposite to the sensing surface of the pressure sensor 29 and always keeps in contact). As the tension spring 26 contracts or stretches, the pressure sensor 29 detects the pressure change, and the adjusting push rod 30 automatically extends or retracts to supplement or release the tension of the toothed transmission belt 28.

[0032] A rotating sleeve 31 is rotatably connected to the outer wall of the handle 10. The rotating sleeve 31 is slidably adapted to the anti-cavity groove 8. A corrugated anti-splash cover 32 is slidably connected between the rotating sleeve 31 and the anti-cavity groove 8.

[0033] In use, the drive motor 22, after being reduced in speed and increased in torque by the gearbox 23, drives the two tool holders 10 and the drill bit 11 to rotate synchronously via the toothed transmission belt 28, achieving synchronous drilling with two drill bits. The toothed transmission belt 28 uses toothed meshing transmission to increase transmission efficiency, ensuring that the two drill bits 11 rotate at the same speed and that the drilling quality is uniform. When adjusting the tool distance, the distance between the toothed transmission wheels 27 at the tail ends of the two tool holders 10 changes, and the automatic tensioning system adjusts the tension of the toothed transmission belt 28 in real time: when the tool distance is shortened, the distance between the two toothed transmission wheels 27 decreases, the toothed transmission belt 28 loosens, the tension spring 26 contracts, causing the gearbox 23 to move along the slide rail 24 toward the tension spring 26, the pressure between the pressure sensor 29 and the adjusting push rod 30 decreases, the control system detects that the pressure is lower than the set value, and automatically controls the adjusting push rod 30 to extend, pressing against the pressure sensor 29 and pushing the gearbox 23 to move until the pressure returns to the set value; when the tool distance increases... As the distance between the two toothed drive pulleys 27 increases, the toothed drive belt 28 becomes taut, and the tension spring 26 is stretched, causing the gearbox 23 to move towards the adjusting push rod 30. The pressure between the pressure sensor 29 and the adjusting push rod 30 increases. The control system detects that the pressure is higher than the set value and automatically controls the adjusting push rod 30 to retract, causing the gearbox 23 to move towards the adjusting push rod 30 until the pressure returns to the set value. Throughout the adjustment process, the two outer smooth tensioning pulleys 16 on the bottom wall of the transmission box 5 always press against the outer side of the toothed drive belt 28, keeping the wrap angle of the drive pulley at the output end of the gearbox 23 in a suitable state, ensuring stable transmission, reducing tooth skipping, and ensuring the smoothness of the drilling process. The pressure sensor 29 detects the change in tension in real time, and the adjusting push rod 30 automatically compensates to ensure that the tension of the toothed drive belt 28 is always kept within the rated range, avoiding tooth skipping caused by an overly loose drive belt and wear of transmission components caused by an overly tight drive belt, thus extending the service life of the transmission system.

[0034] A locking groove 33 is provided at the end of the worktable 1 away from the guide frame 2. A locking plate 34 is slidably connected in the locking groove 33 along the height direction. A conical limiting pin 35 is fixedly installed on the upper wall of the locking plate 34. Two sets of conical pin holes 36 are provided on the lower wall of the positioning frame 4 to be inserted and matched with the conical limiting pin 35. The two sets of conical pin holes 36 are symmetrically distributed at both ends of the positioning frame 4.

[0035] Two limit blocks 37 are fixedly installed at the upper end of the locking groove 33. The upper wall of the locking plate 34 is provided with a snap-fit ​​groove 38 that is compatible with the limit blocks 37. A reset spring 39 is fixedly installed between the lower wall of the locking plate 34 and the bottom wall of the locking groove 33.

[0036] In use, the positioning frame 4 adopts a half-rotation dual-station structure. While drilling is being performed at one station, loading and unloading operations can be performed at the other station, realizing parallel operation of processing and loading / unloading, which greatly improves production efficiency. The stepped through hole 13 at the bottom of the guide sleeve 12 provides precise positioning support for the busbar copper bus. The copper bus falls through the large hole end and is supported by the stepped surface of the small hole end, ensuring the horizontality and positioning accuracy of the copper bus. The auxiliary groove 48 on the side wall of the guide sleeve 12 makes it easy for operators to pick up thin busbar copper bus that is lower than the guide sleeve 12, preventing the copper bus from getting stuck in the guide sleeve 12 and difficult to remove. When switching stations, the operator presses down the locking plate 34 along the locking groove 33, and the return spring 39 is compressed and stored, locking the position. Plate 34 drives the conical limiting pin 35 downward to disengage from the current conical pin hole 36, releasing the rotational freedom of the positioning frame 4; the positioning frame 4 is rotated half a turn around its center, switching the station with the blank copper busbar to the processing station, directly below the drill bit 11; the locking plate 34 is released, the return spring 39 pushes the locking plate 34 upward to reset, and the locking groove 38 presses against the limiting block 37 to achieve the upper limit, preventing the locking plate 34 from coming off upward; the conical limiting pin 35 automatically inserts into another set of conical pin holes 36, using the self-centering effect of the conical surface to precisely lock the positioning frame 4, ensuring the accuracy of the drilling position; the two sets of symmetrically distributed conical pin holes 36 ensure that the positioning accuracy of the two stations is completely consistent, achieving dimensional consistency in batch processing.

[0037] A clamping assembly is slidably connected to the guide frame 2. The clamping assembly includes a sliding plate 40. A limiting groove 41 that is slidably adapted to the sliding plate 40 is provided on the wall surface of the guide frame 2 near the locking groove 33. The sliding plate 40 is threadedly connected to the guide frame 2. Pull plate 42 is fixedly installed at one end of the sliding plate 40 in the sliding direction and is used to pull the sliding plate 40. The drilling template 43 has a drill sleeve 44 fixedly installed at its center and is fixedly connected to the lower wall of the sliding plate 40 by a spring rod 45. Two guide plates 46 are fixedly installed on the two side walls of the drill template 43 in the insertion direction and form an angle with the drill template 43.

[0038] The guide frame 2, the sliding plate 40, and the pusher table 15 are all provided with tool clearance grooves 47.

[0039] During use, the clamping assembly provides automatic clamping and drilling guidance for the busbar copper busbar, preventing displacement and rotation of the copper busbar during drilling and ensuring drilling accuracy. The sliding plate 40 is slidably connected to the guide frame 2 via the limiting groove 41 and can be pulled out via the pull plate 42 for maintenance or replacement of the drill template 43. The threaded connection allows for fine-tuning of the height of the sliding plate 40 to accommodate the clamping requirements of copper busbars of different thicknesses. When the positioning frame 4 rotates to switch positions, the front end of the copper busbar first contacts the guide plates 46 on both sides of the drill template 43. The inclined surface of the guide plate 46 guides the copper busbar to slide smoothly under the drill template 43, avoiding collision between the edge of the copper busbar and the drill template 43. The copper busbar continues to move forward. The drill bit 11 moves upward by pushing the drill template 43, and the spring rod 45 is compressed to generate a downward elastic force. The drill template 43 evenly presses the copper busbar onto the upper surface of the pusher table 15. The pressing force is automatically adjusted according to the thickness of the copper busbar to ensure that the copper busbar is always firmly pressed. The drill sleeve 44 in the center of the drill template 43 provides precise drilling guidance for the drill bit 11, guiding the drill bit 11 to drill vertically into the copper busbar, avoiding drilling deviation, and ensuring the verticality and positional accuracy of the drilling. The guide frame 2, the sliding plate 40, and the tool clearance groove 47 on the pusher table 15 provide sufficient feed space for the drill bit 11 to prevent the drill bit 11 from colliding with other components after drilling through the copper busbar, thus protecting the tool and equipment safety.

[0040] The guide sleeve 12 has an auxiliary groove 48 on its side wall, which makes it easier to pick up the busbar copper busbar when the height of the busbar copper busbar is lower than the guide sleeve 12.

[0041] During use, the lifting servo electric cylinder provides stable driving power for the vertical lifting of the drive frame 3. After the drive frame 3 descends to the position, it automatically activates the locking mode to firmly lock the piston rod, bearing the upward reaction force generated during drilling and preventing the drive frame 3 from shifting, thus ensuring the consistency of the drilling depth. The pusher table 15 is driven by a servo electric actuator with a built-in displacement sensor, which can provide real-time feedback on the lifting stroke of the pusher table 15, accurately control the drilling depth, and adapt to the drilling requirements of busbar copper busbars of different thicknesses. During drilling, the pusher table 15 drives the copper busbar to rise smoothly along the inner wall of the guide sleeve 12 to achieve feed drilling. Compared with the traditional drill bit feed method, the copper busbar feed method is more stable and the drilling quality is higher. The pusher table 15 is plugged into the small hole end of the stepped through hole 13 to ensure that the pusher table 15 is always coaxial with the guide sleeve 12 during the rising process, preventing the copper busbar from tilting.

[0042] Specifically: Operators determine the cross-sectional area of ​​the rectangular busbar by calculating the actual required current carrying capacity. They then use drilling technology to drill out different specifications and shapes of the copper busbar, thereby achieving both the current carrying capacity requirement and the corresponding reduction in cross-sectional area, thus reducing costs. After the equipment is powered on, the control system automatically executes the initialization program. The drive frame 3 rises to the highest position along the guide frame 2 under the action of the electric push rod, and the pusher table 15 descends to the lowest position under the drive of the servo electric push rod. According to the thickness and hole spacing requirements of the copper busbar to be processed, the target tool distance and the set value of the pressure sensor 29 corresponding to the rated tension of the toothed transmission belt 28 are input into the control system. The adjusting motor 20 drives the bidirectional lead screw 18 to rotate in the lead screw adapter 17 by meshing the drive bevel gear 21 with the driven bevel gear 19. The bidirectional lead screw 18 drives the two sliders 9 to move synchronously relative to each other along the guide slide 7, thereby driving the tool holder 10 and the drill bit 11 to move to the set tool distance; at the same time, the tensioning system automatically adjusts the position of the adjusting push rod 30 to stabilize the detection value of the pressure sensor 29 at the set value, completing the initial calibration.

[0043] The operator places the busbar copper busbar blank to be processed into the guide sleeve 12, which is currently in the loading / unloading position. The copper busbar falls through the large end of the stepped through-hole 13 and is supported and positioned by the stepped surface of the small end. At the same time, a small amount of residual chips from the processing at another position are cleaned up. The finished busbar copper busbar is then removed through the auxiliary groove 48 on the side wall of the guide sleeve 12. The locking plate 34 is pressed down along the locking groove 33, and the return spring 39 is compressed and stored. The locking plate 34 drives the conical limit pin 35 to disengage from the current conical pin hole 36, releasing the rotational freedom of the positioning frame 4. The positioning frame 4 is then rotated 180° around its center, switching the position with the blank copper busbar to the processing position, directly below the drill bit 11. When the locking plate 34 is released, the reset spring 39 pushes the locking plate 34 upward to reset it. The snap-fit ​​groove 38 presses against the limit block 37 to achieve the upper limit position. The conical limit pin 35 automatically inserts into another set of conical pin holes 36, and the positioning frame 4 is precisely locked by the self-centering effect of the conical surface.

[0044] During the rotation of the positioning frame 4, the front end of the copper busbar first contacts the guide plates 46 on both sides of the drill template 43. The inclined surface of the guide plate 46 guides the copper busbar to slide smoothly into the lower part of the drill template 43. The copper busbar continues to move forward, pushing the drill template 43 to move upward. The spring rod 45 is compressed to generate a downward elastic force, which presses the copper busbar tightly onto the upper surface of the pusher table 15 through the drill template 43. When adjusting the tool spacing, a new target tool spacing is input into the control system. The adjusting motor 20 automatically drives the bidirectional lead screw 18 to rotate, causing the two tool holders 10 to move synchronously relative to each other. The rotating sleeve 31 on the outer wall of the tool holder 10 slides along the clearance groove 8 with the tool holder 10. The corrugated splash guard 32 extends and retracts with the rotating sleeve 31 to prevent chips and coolant from entering the transmission box 5. When the tool spacing is shortened, the distance between the toothed transmission wheels 27 at the tail ends of the two tool holders 10 decreases, the toothed transmission belt 28 loosens, and the tension spring 26 contracts, causing the gearbox 23 to move along the slide rail 24 and the track groove 25 towards the tension spring 26. The pressure between the pressure sensor 29 and the adjusting push rod 30 decreases. The control system detects that the pressure is lower than the set value and automatically controls the adjusting push rod 30 to extend, pressing against the pressure sensor 29 and pushing the gearbox 23 to move until the pressure returns to the set value. When the tool pitch increases, the distance between the two toothed drive pulleys 27 increases, the toothed drive belt 28 becomes taut, and the tension spring 26 is stretched, causing the gearbox 23 to move towards the adjusting push rod 30. The pressure between the pressure sensor 29 and the adjusting push rod 30 increases. The control system detects that the pressure is higher than the set value and automatically controls the adjusting push rod 30 to retract, causing the gearbox 23 to move towards the adjusting push rod 30 until the pressure returns to the set value. Throughout the adjustment process, the two outer smooth tensioning pulleys 16 on the bottom wall of the transmission box 5 always press against the outer side of the toothed drive belt 28, keeping the wrap angle of the drive pulley at the output end of the gearbox 23 in a suitable state, ensuring stable transmission and reducing tooth skipping.

[0045] After the tool spacing is adjusted, the servo electric cylinder drives the drive frame 3 to descend smoothly along the guide frame 2, allowing the tips of the two drill bits 11 to insert into the corresponding drill sleeves 44 on the drill template 43. After the drive frame 3 descends to its position, the servo electric cylinder activates the locking mode, firmly locking the drive frame 3 in its current position to withstand the reaction force during drilling. The drive motor 22 starts, driving the two tool holders 10 and the drill bits 11 to rotate synchronously through the gearbox 23 and the toothed transmission belt 28. Driven by the servo electric push rod, the pusher table 15 drives the copper busbar to rise smoothly along the inner wall of the guide sleeve 12 for symmetrical drilling. During drilling, the drill template 43, under the action of the spring rod 45, always presses the copper busbar to prevent it from following the drill bit 11 as it rotates. The feed forces of the two drill bits 11 are equal in magnitude and opposite in direction, canceling each other out. The copper busbar is not subjected to unidirectional axial force, greatly improving processing stability. After the pusher table 15 rises to the set depth, it automatically descends and resets, completing the simultaneous processing of the two holes.

[0046] Afterwards, the drive frame 3 rises and resets to the highest position, adjusts the tool distance, and prepares for the next processing. The operator repeats the above steps of loading and unloading, station switching, automatic clamping, tool distance adjustment, and drilling to achieve continuous and uninterrupted dual-station cyclic operation. This includes a control system, which is electrically connected to the regulating motor 20, the drive motor 22, the servo electric actuator driving the pusher table 15, the servo electric cylinder driving the regulating actuator 30, the lifting servo electric cylinder, and the pressure sensor 29. The control system is used to receive the pressure signal detected by the pressure sensor 29, control the extension and retraction of the regulating actuator 30 according to the preset rated tension setting value, and coordinate the timing of the lifting of the drive frame 3, the lifting of the pusher table 15, the start and stop of the drive motor 22, and the start and stop of the regulating motor 20.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A busbar batch drilling device, characterized in that, include: A workbench (1) has a guide frame (2) fixedly installed on its upper wall. A drive frame (3) is slidably connected above the guide frame (2). A positioning frame (4) is rotatably connected to the upper wall of the workbench (1). A transmission box (5) is fixedly installed inside the drive frame (3). A partition plate (6) is fixedly installed inside the transmission box (5). A guide groove (7) is opened in the center of the partition plate (6). An anti-air groove (8) corresponding to the guide groove (7) is opened on the bottom wall of the transmission box (5). Two relatively movable sliders (9) are slidably connected inside the guide groove (7). A tool holder (10) is rotatably connected to the lower wall of the slider (9). A drive assembly is connected to the outside of the tool holder (10) through a belt drive. A drill bit (11) is connected to the lower end of the tool holder (10). The positioning frame (4) has two guide sleeves (12) fixedly installed on its upper wall. The bottom wall of the guide sleeve (12) has a stepped through hole (13), and the large end of the stepped through hole (13) is connected to the inner cavity of the guide sleeve (12). The upper wall of the workbench (1) is provided with a drive groove (14) corresponding to the transmission box (5). A pusher (15) driven by a servo electric actuator is fixedly installed at the center of the bottom wall of the drive groove (14). The pusher (15) is plugged into the small hole end of the stepped through hole (13). The bottom wall of the transmission box (5) is fixedly equipped with two outer smooth tension wheels (16), which are symmetrically arranged on both sides of the drive component drive wheel; A clamping assembly is slidably connected to the guide frame (2), the clamping assembly comprising: The sliding plate (40) has a limiting groove (41) on the wall near the locking groove (33) that is adapted to slide the sliding plate (40). The sliding plate (40) is threadedly connected to the guide frame (2). Pull plate (42) is fixedly installed at one end of the sliding plate (40) in the sliding direction and is used to pull the sliding plate (40); The drilling template (43) has a drill sleeve (44) fixedly installed at its center and is fixedly connected to the lower wall of the sliding plate (40) by a spring rod (45); Two guide plates (46) are fixedly installed on the two side walls of the drill template (43) in the insertion direction and form an angle with the drill template (43).

2. The busbar batch drilling device according to claim 1, characterized in that, Two lead screw adapter frames (17) are fixedly installed on the upper wall of the partition plate (6), respectively located at both ends of the guide slide groove (7). A bidirectional lead screw (18) is rotatably connected inside the lead screw adapter frame (17). The bidirectional lead screw (18) meshes with two sliders (9) respectively. A driven bevel gear (19) is fixedly installed at the center of the bidirectional lead screw (18). An adjusting motor (20) is fixedly installed on the upper wall of the partition plate (6). A driving bevel gear (21) that meshes with the driven bevel gear (19) is fixedly installed at the drive end of the adjusting motor (20).

3. The busbar batch drilling device according to claim 1, characterized in that, The driving component includes: A drive motor (22) is connected to a gearbox (23) at its drive end. Two slide rails (24) are fixedly installed on the lower wall of the gearbox (23). A track groove (25) adapted to the slide rails (24) is opened on the bottom wall of the transmission box (5). A tension spring (26) is fixedly installed between the gearbox (23) and the inner side wall of the transmission box (5). The sliding direction of the gearbox (23) is perpendicular to the moving direction of the tool holder (10). Three toothed drive wheels (27) are fixedly installed at the tail ends of the two tool holders (10) and the output end above the gearbox (23), respectively; one of the toothed drive wheels (27) is fixedly installed at the output end of the gearbox (23) as the driving wheel of the drive assembly, and the other two toothed drive wheels (27) are fixedly installed at the tail ends of the two tool holders (10) as driven wheels; The toothed drive belt (28) is fitted on three toothed drive wheels (27) and meshes with them. The outer side of the toothed drive belt (28) is always in contact with the two outer smooth tension wheels (16).

4. The busbar batch drilling device according to claim 3, characterized in that, A pressure sensor (29) is fixedly installed on the side wall of the gearbox (23) away from the tension spring (26). A servo-driven adjusting push rod (30) is fixedly installed on the inner side wall of the transmission box (5) opposite to the tension spring (26). As the tension spring (26) contracts or stretches, the pressure sensor (29) detects the pressure change, and the adjusting push rod (30) automatically extends or retracts to supplement or release the tension of the toothed transmission belt (28).

5. The busbar batch drilling device according to claim 1, characterized in that, The outer wall of the handle (10) is rotatably connected to a rotating sleeve (31), the rotating sleeve (31) is slidably adapted to the anti-cavity groove (8), and a corrugated anti-splash cover (32) is slidably connected between the rotating sleeve (31) and the anti-cavity groove (8).

6. The busbar batch drilling device according to claim 1, characterized in that, The workbench (1) has a locking groove (33) at one end away from the guide frame (2). A locking plate (34) is slidably connected in the locking groove (33) along the height direction. A conical limiting pin (35) is fixedly installed on the upper wall of the locking plate (34). The lower wall of the positioning frame (4) has two sets of conical pin holes (36) that are adapted to be inserted into the conical limiting pins (35). The two sets of conical pin holes (36) are symmetrically distributed at both ends of the positioning frame (4).

7. A busbar batch drilling device according to claim 6, characterized in that, Two limiting blocks (37) are fixedly installed on the upper end of the locking groove (33). The upper wall of the locking plate (34) is provided with a snap-fit ​​groove (38) that is compatible with the limiting blocks (37). A reset spring (39) is fixedly installed between the lower wall of the locking plate (34) and the bottom wall of the locking groove (33).

8. A busbar batch drilling device according to claim 1, characterized in that, The guide frame (2), sliding plate (40) and pusher table (15) are all provided with tool clearance grooves (47).

9. A busbar batch drilling device according to claim 1, characterized in that, The guide sleeve (12) has an auxiliary groove (48) on its side wall, which makes it easier to pick up the busbar copper busbar when the height of the busbar copper busbar is lower than that of the guide sleeve (12).

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