Full-automatic polishing device and method for conducting bar of new energy automobile

Abstract

The invention relates to the technical field of new energy conducting bar production, in particular to a new energy automobile conducting bar full-automatic polishing device and method.The new energy automobile conducting bar full-automatic polishing device comprises a chain type transmission mechanism, a polishing transmission mechanism and a polishing mechanism, the chain type transmission mechanism is provided with multiple sets of electric bar clamping mechanisms, and the electric bar clamping mechanisms are arranged on the polishing transmission mechanism; the chain type transmission mechanism is used for driving the electric row clamping mechanism to circularly transmit, and the electric row clamping mechanism is used for clamping and fixing an electric row; the polishing transmission mechanism is used for driving the polishing mechanism to move; and the grinding mechanism comprises a mirror image transmission module, two grinding driving modules and an alloy grinding wheel, the two grinding driving modules are oppositely arranged, the two grinding driving modules are arranged on the mirror image transmission module, and the mirror image transmission module is used for driving the two grinding driving modules to relatively move in a mirror image mode. High efficiency, high precision and high reliability of electric row polishing are achieved. And the production efficiency is greatly improved, the labor cost is reduced, and the high-quality standard of products is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy conductive bar production, and in particular to a fully automatic polishing device and method for conductive bars of new energy vehicles. Background Art

[0002] With the increasing global emphasis on environmental protection and sustainable development, new energy vehicles (NEVs), as green and efficient means of transportation, are gradually becoming the development direction of the automotive industry. One of the core components of NEVs is the battery system, in which the battery bus plays a vital role. It connects the individual cells in the battery module, enabling the transmission and distribution of electrical energy. Its performance directly impacts the safety, stability, and charge and discharge efficiency of the battery system.

[0003] Welding is a critical process in the manufacturing of conductive bars for new energy vehicle batteries. Since conductive bars are typically made of metal materials such as copper and aluminum, these metal materials easily react with oxygen in the air, forming an oxide layer. The presence of the oxide layer increases the resistance of the conductive bar welds, reduces the efficiency of power transmission, and may even cause local overheating, affecting the performance and safety of the battery system. Therefore, before welding, the oxide layer must be polished off the welded parts of the conductive bars to ensure good weld quality. Existing polishing is done manually, which is inefficient and costly. Therefore, a new design is needed for the existing copper bar polishing process. Summary of the Invention

[0004] To address these issues, the present invention achieves high efficiency, high precision, and high reliability in conducting bar grinding. This significantly improves production efficiency, reduces labor costs, and ensures high product quality standards.

[0005] The technical solution adopted by the present invention is: a fully automatic grinding device for the conductive bar of a new energy vehicle, comprising a chain transmission mechanism, a grinding transmission mechanism and a grinding mechanism, wherein the chain transmission mechanism is provided with a conductive bar clamping mechanism, and the conductive bar clamping mechanism is provided with multiple groups, and the chain transmission mechanism is used to drive the conductive bar clamping mechanism for cyclic transmission, and the conductive bar clamping mechanism is used to clamp and fix the conductive bar; the grinding transmission mechanism is used to drive the grinding mechanism to move; the grinding mechanism comprises a mirror transmission module, a grinding drive module and an alloy grinding wheel, and the grinding drive modules are relatively arranged in two groups, and the two groups of the grinding drive modules are arranged on the mirror transmission module, and the mirror transmission module is used to drive the two groups of grinding drive modules to move mirror-image relative to each other, so as to grind the two sides of the conductive bar; the alloy grinding wheel is a conductive wheel, and when contacting the conductive bar, the two groups of alloy grinding wheels are electrically connected to determine whether the conductive bar is to be ground.

[0006] A further improvement to the above scheme is that the chain transmission mechanism includes a fixed panel, a ring track, a ring chain and a transmission drive module, the ring track is arranged on the fixed panel, the electric bar clamping mechanism is arranged on the ring track and slides along the ring track, the ring chain is arranged on the fixed panel, the transmission drive module is arranged on the fixed panel and is used to drive the ring chain transmission, one side of the electric bar clamping mechanism is connected to the ring chain so as to slide along the ring track under the action of the transmission drive module.

[0007] A further improvement to the above scheme is that a movable positioning module is provided on the fixed panel, and the movable positioning module is used to position the electric bar clamping mechanism on the circular track; the movable positioning module includes a positioning drive cylinder, a positioning rotating connecting rod and a movable block, and the movable block is provided with a positioning pin, and the electric bar clamping mechanism is provided with a positioning groove to cooperate with the positioning pin; the positioning drive cylinder is provided on the fixed panel, the positioning rotating connecting rod is provided with a positioning sleeve, and is provided on the fixed panel through the positioning sleeve, and the movable block is provided on the positioning connecting rod, and the positioning drive cylinder is used to drive the positioning rotating connecting rod to rotate, so as to drive the movable block to move toward the electric bar clamping mechanism, so that the positioning pin cooperates with the positioning groove.

[0008] A further improvement to the above scheme is that the electric busbar clamping mechanism includes a clamping slider, a clamping jig, a clamping support seat, and a first clamping drive module and a second clamping drive module, the clamping slider is arranged on the chain transmission mechanism, the clamping jig is arranged on the clamping slider, the clamping support seat is arranged on the clamping slider and opposite to the clamping jig, the clamping jig is used to fix the rear end of the electric busbar, the first clamping drive module is used to drive the first clamping plate to clamp the side of the electric busbar and fix it on the clamping support seat, and the second clamping drive module is used to drive the second clamping plate to clamp and fix the surface of the electric busbar on the clamping support seat.

[0009] A further improvement to the above solution is that the mirror transmission module drives the grinding drive module to move relative to the two sides of the electric strip according to the electrical conduction of the alloy grinding wheel, and grinds the electric strip through the alloy grinding wheel.

[0010] A further improvement to the above scheme is that the grinding transmission mechanism includes a fixed base and an XZ-axis transmission module, the fixed base is a cast iron base, the XZ-axis transmission module is arranged on the fixed base, and the mirror transmission module is arranged on the fixed base. The XZ-axis transmission module is used to drive the mirror transmission module to drive the alloy grinding wheel to move toward the electric row fixing device.

[0011] A further improvement to the above scheme is that the mirror transmission module is a synchronous belt transmission module, and the two sets of grinding drive modules are respectively arranged on the bidirectional transmission sides of the synchronous belt, which drive the two sets of grinding drive modules to drive in a mirror manner during synchronous belt transmission; the grinding drive module is a servo motor, and the driving end of the servo motor is provided with a grinding spindle, and the alloy grinding wheel is provided on the grinding spindle.

[0012] A further improvement to the above scheme is that the cross-sectional shape of the alloy grinding wheel is tower-shaped, and the alloy grinding wheel includes a tower-shaped frame and a grinding ring. The tower-shaped frame is used to connect the grinding spindle, and the grinding ring is arranged at the end of the tower-shaped frame to grind the electric bus and remove the oxide layer on the surface of the electric bus.

[0013] A further improvement to the above solution is that a protective cover is provided on the outside of the alloy grinding wheel, and a dust suction duct is provided on the outside of the protective cover, and the dust suction duct is used to collect dust generated by the alloy grinding wheel during the grinding process.

[0014] A method for automatically polishing conductive bars based on a fully automatic polishing device for conductive bars of new energy vehicles comprises the following steps: Step S1. Transmission and Positioning: A chain transmission mechanism drives multiple sets of electric bar clamping mechanisms to circulate along a circular track. When the target electric bar clamping mechanism moves to the grinding station, the positioning drive cylinder of the mobile positioning module drives the positioning rotary connecting rod to rotate, driving the positioning pin on the movable block to insert into the positioning groove of the electric bar clamping mechanism, achieving precise positioning of the tooling; Step S2. Layered clamping and fixing: The first clamping drive module drives the first clamping plate to clamp the side of the power bar, and the second clamping drive module drives the second clamping plate to press the surface of the power bar, so that the rear end of the power bar is fixed between the clamping fixture and the clamping support seat; Step S3. Mirror feed: The mirror drive module is driven by the XZ axis drive module to move as a whole, so that the two sets of alloy grinding wheels approach the end surface to be polished by the electric row; Step S4. Synchronous mirror polishing: Start the synchronous belt drive of the mirror drive module to drive the two sets of polishing drive modules to move relative to each other, while the servo motor drives the alloy polishing wheel to rotate at high speed; Step S5. Real-time conductivity determination: When two sets of alloy grinding wheels simultaneously contact the surfaces of both sides of the electrode, an electrical conduction loop is formed, triggering the grinding depth control signal. The electrical conduction signal is detected and verified: the contact pressure reaches 0.5-0.8MPa; the current intensity is stable in the range of 5-20mA; the signal duration is ≥10ms; if the conditions are met, the reference zero point calibration is triggered; Step S6. Dynamic grinding execution: With the electrical conduction trigger position as the reference zero point, control the mirror transmission module to drive the alloy grinding wheel to feed synchronously according to the preset compensation amount Δd, and remove the oxide layer on the surface of the electric row through the pyramidal grinding ring; perform layered feeding according to the aluminum row grinding process: Rough grinding stage: feed compensation amount Δd1 at a speed of 0.8-1.2 mm / s to remove the oxide layer; Fine grinding stage: reduce the speed to 0.3-0.5 mm / s and feed Δd2, and control the surface roughness Ra≤1.6 μm; Edge processing: Drive the mirror transmission module to tilt the angle θ, and add the compensation amount Δd_e=0.1-0.2mm for chamfering.

[0015] The beneficial effects of the present invention are: Compared with the existing electric grinding, the present invention combines a chain transmission mechanism with multiple groups of electric grinding clamping mechanisms. Multiple groups of clamping stations move cyclically along a circular track, so that the loading, grinding, and unloading processes are performed in parallel, eliminating the waiting time of the traditional single station and improving production efficiency; the mirror transmission module and the conductive alloy wheel cooperate to solve the problem of double-sided synchronous grinding accuracy. The two groups of alloy grinding wheels are forced to strictly synchronize the mirror relative movement to ensure that the double-sided grinding depth of the electric grinding is completely symmetrical, and completely solve the problem of tilted grinding caused by the independent drive of the traditional two machines. The electrical conductivity judgment mechanism of the conductive alloy wheel: when the two grinding wheels contact the surfaces on both sides of the electric grinding wheel at the same time, a conductive loop is automatically formed, and the grinding action is directly triggered without the need for additional sensors, which simplifies the system structure and avoids misjudgment. The grinding transmission mechanism is linked to the mirror transmission module: through hierarchical motion control, the overall positioning is performed first and then the mirror adjustment is performed to eliminate the cumulative positioning error and ensure the precise alignment of the grinding wheel and the electric grinding wheel. The conductive properties of the alloy grinding wheel work in conjunction with the mirror motion: using electrical conduction as a real-time feedback signal of physical contact, automatic calibration of the grinding zero point is achieved, avoiding accuracy fluctuations caused by human intervention.

[0016] The present invention realizes the stable clamping and cyclic transmission of the electric bar by combining a chain transmission mechanism with a bar clamping mechanism. The use of the chain transmission mechanism ensures the continuity and stability of the electric bar during the grinding process, avoiding the errors and inefficiency caused by manual operation. The multiple groups of the bar clamping mechanism further improve the production capacity of the device, making mass production possible. The coordinated work of the grinding transmission mechanism and the grinding mechanism ensures the precise control of the grinding process. The grinding transmission mechanism is responsible for driving the movement of the grinding mechanism, and the grinding mechanism consists of a mirror transmission module, a grinding drive module and an alloy grinding wheel. The design of the mirror transmission module enables the two groups of grinding drive modules to move relative to each other in a mirrored manner, thereby synchronously grinding the two sides of the electric bar, ensuring the flatness and consistency of the surface of the electric bar. The method of simultaneous double-sided grinding not only improves the grinding efficiency, but also effectively reduces the deformation problem of the electric bar caused by single-sided grinding. The selection of the alloy grinding wheel and its conductive properties provide additional safety guarantees and quality monitoring measures for the grinding process. As a conductive wheel, the alloy grinding wheel forms an electrical connection when in contact with an electric rod. This connection allows for real-time monitoring of the grinding status and ensures a smooth grinding process. Furthermore, the wear resistance and durability of the alloy material ensure the stable performance of the grinding wheel over long periods of use, reducing maintenance costs. This embodiment achieves high efficiency, high precision, and high reliability in electric rod grinding. This significantly improves production efficiency, reduces labor costs, and ensures high product quality standards.

[0017] This automated electric bar grinding method, based on the fully automatic grinding device for conductive bars used in new energy vehicles, utilizes transmission positioning and layered clamping for zero-displacement machining. The cyclic transmission and locating pin slot mechanism utilizes chained multi-station flow and physical locking of the locating pins to eliminate transmission cumulative errors and achieve high repeatability. Synchronously constraining the lateral displacement and surface vibration of the conductive bar solves chatter issues during thin-walled conductive bar machining and improves clamping rigidity. Dual-stage positioning using XZ-axis coarse adjustment and mirror fine adjustment eliminates mechanical system backlash errors and achieves high alignment accuracy. By combining current intensity, pressure threshold, and duration, it replaces traditional sensors, reducing the false trigger rate to below 0.1% and improving zero-point calibration efficiency. Dynamic layered grinding continuously executes three stages: rough grinding, fine grinding, and chamfering. Segmented speed reduction and compensation control simultaneously achieve thorough oxide layer removal and substrate protection. Chamfering is performed simultaneously during mirror motion, eliminating edge burrs caused by traditional secondary clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional schematic diagram of the fully automatic grinding device for conductive bars of new energy vehicles according to the present invention; Figure 2 for Figure 1 A three-dimensional schematic diagram from another perspective of the fully automatic grinding device for conductive bars of new energy vehicles; Figure 3 for Figure 1 A schematic diagram of the main view of the fully automatic grinding device for conductive bars of new energy vehicles; Figure 4 for Figure 2 A is an enlarged schematic diagram; Figure 5 for Figure 1 Schematic diagram of the internal structure of the fully automatic grinding device for conductive bars of new energy vehicles; Figure 6 for Figure 1 Schematic diagram of the structure of the alloy grinding wheel of the fully automatic grinding device for conductive bars of new energy vehicles; Figure 7 Schematic diagram of the process of the electric automatic grinding method of the present invention.

[0019] Explanation of the accompanying drawings: chain transmission mechanism 1, fixed panel 11, annular track 12, annular chain 13, transmission drive module 14, mobile positioning module 15, positioning drive cylinder 151, positioning rotating connecting rod 152, movable block 153, positioning pin 154, positioning sleeve 155, grinding transmission mechanism 2, fixed base 21, XZ axis transmission module 22, grinding mechanism 3, mirror transmission module 31, grinding drive module 32, grinding spindle 321, alloy grinding wheel 33, tower frame 331, grinding ring 332, protective cover 333, dust suction duct 334, transmission mechanism 34, electric bar clamping mechanism 4, clamping slider 41, clamping fixture 42, clamping support seat 43, first clamping drive module 44, first clamping plate 441, second clamping drive module 45, second clamping plate 451. DETAILED DESCRIPTION

[0020] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0021] It should be noted that when an element is referred to as being “fixed to” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention pertains. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. Figures 1 to 7As shown, in one embodiment of the present invention, a fully automatic grinding device for a conductive bar of a new energy vehicle is involved, comprising a chain transmission mechanism 1, a grinding transmission mechanism 2 and a grinding mechanism 3, wherein the chain transmission mechanism 1 is provided with a conductive bar clamping mechanism 4, and the conductive bar clamping mechanism 4 is provided with multiple groups, and the chain transmission mechanism 1 is used to drive the conductive bar clamping mechanism 4 for cyclic transmission, and the conductive bar clamping mechanism 4 is used to clamp and fix the conductive bar; the grinding transmission mechanism 2 is used to drive the grinding mechanism 3 to move; the grinding mechanism 3 includes a mirror transmission module 31, a grinding drive module 32 and an alloy grinding wheel 33, and the grinding drive module 32 is relatively arranged in two groups, and the two groups of the grinding drive modules 32 are arranged on the mirror transmission module 31, and the mirror transmission module 31 is used to drive the two groups of grinding drive modules 32 to move relative to each other in a mirrored manner, so as to grind the two sides of the conductive bar; the alloy grinding wheel 33 is a conductive wheel, and when contacting the conductive bar, the two groups of alloy grinding wheels 33 are electrically connected to determine whether the conductive bar is to be ground. This embodiment combines a chain transmission mechanism 1 with multiple sets of electric bar clamping mechanisms 4. Multiple sets of clamping stations move cyclically along a circular track, so that the loading, grinding, and unloading processes are carried out in parallel, eliminating the waiting time of traditional single stations and improving production efficiency. The mirror transmission module 31 cooperates with the conductive alloy wheel to solve the problem of double-sided synchronous grinding accuracy. The two sets of alloy grinding wheels 33 are forced to strictly synchronize the mirror relative movement to ensure that the double-sided grinding depth of the electric bar is completely symmetrical, which completely solves the problem of tilted grinding caused by the traditional dual-machine independent drive. The electrical conductivity judgment mechanism of the conductive alloy wheel: when the two grinding wheels contact the surfaces of both sides of the electric bar at the same time, a conductive circuit is automatically formed, directly triggering the grinding action without the need for additional sensors, which simplifies the system structure and avoids misjudgment. The grinding transmission mechanism 2 is linked to the mirror transmission module 31: through hierarchical motion control, the overall positioning is first carried out and then the mirror fine-tuning is carried out to eliminate the cumulative positioning error and ensure the precise alignment of the grinding wheel and the electric bar. The conductive properties of the alloy grinding wheel 33 work in conjunction with the mirror motion: electrical conduction is used as a real-time feedback signal of physical contact to achieve automatic calibration of the grinding zero point, avoiding accuracy fluctuations caused by human intervention.

[0023] In the above embodiment, the stable clamping and cyclic transmission of the electric bar are achieved by combining the chain transmission mechanism 1 with the electric bar clamping mechanism 4. The use of the chain transmission mechanism 1 ensures the continuity and stability of the electric bar during the grinding process, and avoids the errors and inefficiencies caused by manual operation. The multiple groups of electric bar clamping mechanisms 4 further improve the production capacity of the device, making mass production possible. The coordinated work of the grinding transmission mechanism 2 and the grinding mechanism 3 ensures the precise control of the grinding process. The grinding transmission mechanism 2 is responsible for driving the movement of the grinding mechanism 3, and the grinding mechanism 3 is composed of a mirror transmission module 31, a grinding drive module 32 and an alloy grinding wheel 33. The design of the mirror transmission module 31 enables the two groups of grinding drive modules 32 to move relative to each other in a mirrored manner, thereby synchronously grinding the two sides of the electric bar, ensuring the flatness and consistency of the electric bar surface. The method of simultaneous grinding on both sides not only improves the grinding efficiency, but also effectively reduces the deformation problem of the electric bar caused by single-sided grinding. The selection of the alloy grinding wheel 33 and its conductive properties provide additional safety and quality monitoring measures for the grinding process. As a conductive wheel, the alloy grinding wheel 33 forms an electrical connection when in contact with the electric row, and the two sets of alloy grinding wheels 33 can be used to monitor the grinding status in real time to ensure the smooth progress of the grinding process. In addition, the wear resistance and durability of the alloy material also ensure the stable performance of the grinding wheel under long-term use and reduce maintenance costs. This embodiment achieves high efficiency, high precision and high reliability of electric row grinding. It greatly improves production efficiency, reduces labor costs, and ensures the high quality standards of the product.

[0024] See Figure 2~Figure 3As shown, the chain transmission mechanism 1 includes a fixed panel 11, a circular track 12, a circular chain 13, and a transmission drive module 14. The circular track 12 is mounted on the fixed panel 11. The electric bar clamping mechanism 4 is mounted on the circular track 12 and slides along the circular track 12. The circular chain 13 is mounted on the fixed panel 11. The transmission drive module 14 is mounted on the fixed panel 11 and is used to drive the circular chain 13 for transmission. One side of the electric bar clamping mechanism 4 is connected to the circular chain 13, so that it slides along the circular track 12 under the action of the transmission drive module 14. In this embodiment, the fixed panel 11 serves as the basic support structure, ensuring the stability and reliability of the entire transmission system. The circular track 12 is mounted on the fixed panel 11, providing a precise sliding path for the electric bar clamping mechanism 4, ensuring the positioning accuracy and smooth operation of the electric bar during transmission. The electric bar clamping mechanism 4 slides along the circular track 12, achieving orderly transportation of the electric bar and avoiding the inefficiency and human error caused by traditional manual operation. The combination of the ring chain 13 and the transmission drive module 14 further enhances the power performance and control accuracy of the transmission system. The ring chain 13 is fastened to the fixed panel 11, and is driven by the transmission drive module 14 to achieve continuous and stable power output. One side of the electric bar clamping mechanism 4 is connected to the ring chain 13. With the help of the transmission drive module 14, it can slide smoothly along the ring track 12, ensuring the rapid switching of the electric bar between various workstations, greatly improving production efficiency. The adoption of the chain transmission mechanism 1 has also significantly improved the intelligence level of the fully automatic grinding device for the conductive bar of new energy vehicles. Through precise mechanical transmission and intelligent control systems, the full automation of the electric bar grinding process is achieved, which not only reduces labor costs, but also effectively improves product quality and consistency.

[0025] A movable positioning module 15 is provided on the fixed panel 11, and the movable positioning module 15 is used to position the electric bar clamping mechanism 4 on the annular track 12; the movable positioning module 15 includes a positioning drive cylinder 151, a positioning rotating link 152 and a movable block 153, and the movable block 153 is provided with a positioning pin 154, and the electric bar clamping mechanism 4 is provided with a positioning groove to cooperate with the positioning pin 154; the positioning drive cylinder 151 is provided on the fixed panel 11, and the positioning rotating link 152 is provided with a positioning sleeve 155, and is provided on the fixed panel 11 through the positioning sleeve 155, and the movable block 153 is provided on the positioning link, and the positioning drive cylinder 151 is used to drive the positioning rotating link 152 to rotate, so as to drive the movable block 153 to move toward the electric bar clamping mechanism 4, so that the positioning pin 154 cooperates with the positioning groove. In this embodiment, the movable positioning module 15 is composed of a positioning drive cylinder 151, a positioning rotating connecting rod 152 and a movable block 153, wherein the movable block 153 is equipped with a positioning pin 154, and the electric bar clamping mechanism 4 is provided with a matching positioning groove. It ensures the perfect match between the positioning pin 154 and the positioning groove, thereby achieving the precise fixation of the electric bar clamping mechanism 4. The positioning drive cylinder 151 is installed on the fixed panel 11, and drives the positioning rotating connecting rod 152 to rotate, thereby driving the movable block 153 to move toward the electric bar clamping mechanism 4, completing the docking of the positioning pin 154 with the positioning groove. The positioning sleeve 155 on the positioning rotating connecting rod 152 is installed through the fixed panel 11, which ensures the stability and reliability of the connecting rod rotation, avoids positioning errors caused by vibration or offset, and further improves the overall performance of the device.

[0026] See Figure 4As shown, the electric busbar clamping mechanism 4 includes a clamping slider 41, a clamping fixture 42, a clamping support seat 43, a first clamping drive module 44, and a second clamping drive module 45. The clamping slider 41 is arranged on the chain transmission mechanism 1, the clamping fixture 42 is arranged on the clamping slider 41, and the clamping support seat 43 is arranged on the clamping slider 41 and opposite to the clamping fixture 42. The clamping fixture 42 is used to fix the rear end of the electric busbar. The first clamping drive module 44 is used to drive the first clamping plate 441 to clamp and fix the side of the electric busbar on the clamping support seat 43. The second clamping drive module 45 is used to drive the second clamping plate 451 to clamp and fix the surface of the electric busbar on the clamping support seat 43. In this embodiment, the clamping slider 41 is arranged on the chain transmission mechanism 1 to ensure the stability and positioning accuracy of the electric busbar during transmission. The clamping jig 42 is installed on the clamping slider 41, opposite to the clamping support seat 43, and is specifically used to fix the rear end of the electric busbar, effectively avoiding the displacement of the electric busbar during the grinding process, and ensuring the consistency and reliability of the grinding. The first clamping drive module 44 drives the first clamping plate 441 to clamp the side of the electric busbar and firmly fix it on the clamping support seat 43. The side clamping method not only enhances the stability of the electric busbar, but also provides a good foundation for subsequent surface grinding. The second clamping drive module 45 further drives the second clamping plate 451 to fit the surface of the electric busbar tightly on the clamping support seat 43, realizing comprehensive fixation of the electric busbar in multiple dimensions, greatly improving the accuracy and efficiency of grinding.

[0027] The mirror transmission module 31 drives the grinding drive module 32 to move relative to the two sides of the electric bar according to the electrical conduction of the alloy grinding wheel 33, and grinds the electric bar through the alloy grinding wheel 33. In this embodiment, the design of the mirror transmission module 31 ensures symmetry and stability during the grinding process. By grinding both sides of the electric bar at the same time, the problems of uneven stress and deformation that may be caused by single-sided grinding are avoided, thereby ensuring the overall flatness and dimensional accuracy of the electric bar. The two-way synchronous grinding mechanism not only improves the grinding efficiency, but also effectively reduces the need for subsequent correction processes and reduces production costs.

[0028] The grinding transmission mechanism includes a fixed base 21 and an XZ-axis transmission module 22. The fixed base 21 is a cast iron base. The XZ-axis transmission module 22 is arranged on the fixed base 21. The mirror transmission module 31 is arranged on the fixed base 21. The XZ-axis transmission module 22 is used to drive the mirror transmission module 31 to drive the alloy grinding wheel 33 to move toward the electric row fixing device. In this embodiment, the XZ-axis transmission module 22 is arranged on the fixed base 21, which realizes the precise drive of the mirror transmission module 31. The alloy grinding wheel 33 can move toward the electric row fixing device according to the preset trajectory, ensuring the accuracy and consistency of the grinding operation. Through the synergistic effect of the XZ-axis transmission module 22, the position and angle of the grinding wheel can be flexibly adjusted to meet the grinding requirements of electric rows of different specifications, greatly improving the versatility and applicability of the equipment. The combined use of the mirror transmission module 31 and the XZ-axis transmission module 22 further enhances the automation level of the system.

[0029] The mirror drive module 31 is a synchronous belt drive module. Two grinding drive modules 32 are respectively arranged on the bidirectional transmission sides of the synchronous belt, driving the two grinding drive modules 32 in mirrored transmission during synchronous belt transmission. The grinding drive module 32 is a servo motor, and the driving end of the servo motor is equipped with a grinding spindle 321. The alloy grinding wheel 33 is mounted on the grinding spindle 321. In this embodiment, the use of a servo motor for the grinding drive module 32 further enhances the controllability and flexibility of the system. Due to its high precision, fast response, and stability, the servo motor, when installed on the driving end of the grinding spindle 321, can precisely control the speed and torque of the grinding spindle 321, ensuring the stability and efficiency of the alloy grinding wheel 33 during operation. This not only improves grinding efficiency but also significantly reduces the risk of material damage caused by speed fluctuations or torque instability. The alloy grinding wheel 33 is mounted on the grinding spindle 321. Driven precisely by the servo motor, it can achieve uniform and efficient grinding on the surface of the electric rod with different materials and hardness. It adapts to the processing needs of various electric discharge materials, significantly extends the service life of the grinding wheel, and reduces maintenance costs.

[0030] The cross-sectional shape of the alloy grinding wheel 33 is tower-shaped, and the alloy grinding wheel 33 includes a tower-shaped frame 331 and a grinding ring 332. The tower-shaped frame 331 is used to connect the grinding spindle 321, and the grinding ring 332 is arranged at the end of the tower-shaped frame 331 to grind the electric bar and remove the oxide layer on the surface of the electric bar. In this embodiment, the alloy grinding wheel 33 is composed of two parts: a tower-shaped frame 331 and a grinding ring 332. The tower-shaped frame 331 is responsible for the connection with the grinding spindle 321, ensuring stability and accuracy during the grinding process. The grinding ring 332 is cleverly arranged at the end of the tower-shaped frame 331, directly acting on the surface of the electric bar, and effectively removing the oxide layer thereon. The tower-shaped structure gives the grinding wheel better mechanical properties, so that the grinding wheel can maintain good balance under high-speed rotation, avoiding uneven grinding caused by vibration. The combined design of the tower frame 331 and the grinding ring 332 not only increases the grinding area but also optimizes the force transmission path, making the grinding force more evenly distributed, thereby improving grinding efficiency and surface finish. The unique design of the tower frame 331 also enhances the durability of the grinding wheel. Under long-term, high-load working conditions, the tower frame 331 effectively disperses stress, reduces wear, and extends the life of the grinding wheel.

[0031] A protective cover 333 is provided on the outside of the alloy grinding wheel 33, and a dust collection duct 334 is provided on the outside of the protective cover 333. The dust collection duct 334 is used to collect dust generated by the alloy grinding wheel 33 during the grinding process. In this embodiment, the introduction of the protective cover 333 can effectively prevent the splashing of metal debris and dust generated during the grinding process, avoiding harm to the operator, while also protecting peripheral equipment from damage, ensuring the continuity and stability of the production process. The outside of the protective cover 333 is further configured with a dust collection duct 334. The dust collection duct 334 can collect dust generated by the alloy grinding wheel 33 during the grinding process in real time, effectively reducing the dust concentration in the workshop, improving the working environment, and reducing occupational health risks.

[0032] like Figures 1 to 7As shown, a method for automatic grinding of conductive bars based on a fully automatic grinding device for conductive bars of new energy vehicles includes the following steps: Step S1. Transmission positioning: driving multiple groups of conductive bar clamping mechanisms 4 to move cyclically along the circular track 12 through a chain transmission mechanism 1. When the target conductive bar clamping mechanism 4 moves to the grinding station, the positioning driving cylinder 151 of the mobile positioning module 15 drives the positioning rotating connecting rod 152 to rotate, driving the positioning pin 154 on the movable block 153 to insert into the positioning groove of the conductive bar clamping mechanism 4, thereby realizing precise positioning of the tooling; Step S2. Layered clamping and fixing: driving the first clamping plate 441 to clamp the side of the conductive bar through the first clamping driving module 44, and at the same time driving the second clamping plate 451 to press the surface of the conductive bar through the second clamping driving module 45, so that the rear end of the conductive bar is fixed between the clamping fixture 42 and the clamping support seat 43; Step S3. Mirror feeding: driving the mirror transmission module 31 to move as a whole through the XZ axis transmission module 22 , so that the two sets of alloy grinding wheels 33 approach the end face of the electric row to be polished; step S4. synchronous mirror grinding: start the synchronous belt drive of the mirror transmission module 31, drive the two sets of grinding drive modules 32 to move relative to each other in a mirrored manner, and at the same time, the servo motor drives the alloy grinding wheel 33 to rotate at high speed; step S5. real-time conductive judgment: when the two sets of alloy grinding wheels 33 contact the surfaces on both sides of the electric row at the same time, an electrical conduction loop is formed, triggering the grinding depth control signal; detect the electrical conduction signal and verify: the contact pressure reaches 0.5-0.8MPa; the current intensity is stable in the range of 5-20mA; the signal duration is ≥10ms; trigger the reference zero point calibration after the conditions are met; step S6. dynamic grinding execution: with the electrical conduction trigger position as the reference zero point, control the mirror transmission module 31 to drive the alloy grinding wheel 33 to feed synchronously according to the preset compensation amount Δd, and remove the oxide layer on the surface of the electric row through the pyramidal grinding ring 332; perform layered feeding according to the aluminum row grinding process: During the rough grinding phase, the feed compensation amount Δd1 is fed at a speed of 0.8-1.2 mm / s to remove the oxide layer. During the fine grinding phase, the feed speed is reduced to 0.3-0.5 mm / s and the feed amount Δd2 is fed to control the surface roughness Ra ≤ 1.6 μm. During edge processing, the mirror transmission module 31 is driven to tilt at an angle θ, and an additional compensation amount Δd_e = 0.1-0.2 mm is added for chamfering. In this embodiment, the transmission positioning and layered clamping of the workpiece are based on zero-displacement processing. The cyclic transmission and positioning pin 154 slot mechanism: chain multi-station flow and physical locking of the positioning pin 154 eliminate transmission cumulative errors and achieve high repeatability positioning accuracy. Synchronously constraining the lateral displacement and surface vibration of the EDM solves the problem of vibration during thin-wall EDM processing and improves clamping rigidity. Two-stage positioning of XZ axis coarse adjustment + mirror fine adjustment: first overall approximation and then mirror micro-feeding avoids the return clearance error of the mechanical system and achieves high alignment accuracy. By combining current intensity, pressure threshold, and duration, this system replaces traditional sensors, reducing the false trigger rate to below 0.1% and improving zero-point calibration efficiency. Dynamic layered grinding continuously executes three stages: rough grinding, fine grinding, and chamfering. Segmented speed reduction and compensation control simultaneously achieve thorough oxide layer removal and substrate protection. Chamfering is performed simultaneously in a mirrored motion, eliminating edge burrs caused by traditional secondary clamping.

[0033] Specifically, the transmission and positioning step S1 ensures the precise positioning of the electric row at the grinding station. The synergistic effect of the chain transmission mechanism 1 and the mobile positioning module 15 realizes the efficient cyclic movement and precise positioning of the electric row clamping mechanism 4, laying the foundation for the subsequent grinding process. It improves production efficiency and ensures the consistency of the starting position of each grinding, thereby improving the overall quality of the product. The layered clamping and fixing step S2 ensures the stability and safety of the electric row during the grinding process through the dual effects of the first clamping drive module 44 and the second clamping drive module 45. It can effectively prevent the electric row from being displaced or deformed during high-speed grinding, ensuring grinding accuracy and surface flatness. The mirror feeding S3 and synchronous mirror grinding S4 steps further improve the uniformity and symmetry of grinding. The coordinated use of the XZ axis transmission module 22 and the mirror transmission module 31 enables the two sets of alloy grinding wheels 33 to move synchronously and relative to each other, and at the same time, the servo motor drives the alloy grinding wheel 33 to rotate at high speed, ensuring the efficiency and consistency of the grinding process. It is suitable for electric busbars that need to be polished on both sides at the same time, which can significantly shorten the processing time and improve the yield rate. The conductive real-time judgment S5 step introduces a detection mechanism for the conductive circuit, which realizes the precise control of the polishing depth. Through the comprehensive verification of contact pressure, current intensity and signal duration, the reference zero point calibration is triggered to ensure the accuracy and stability of the polishing depth. It effectively avoids the problems of over-polishing or under-polishing, and improves the reliability and consistency of the product. The dynamic polishing execution S6 step realizes the fine processing of the electric busbar surface through layered feeding in three stages: rough grinding, fine grinding and edge processing. The rough grinding stage quickly removes the oxide layer, the fine grinding stage finely adjusts the surface roughness, and the edge processing stage performs chamfer grinding. The whole process not only ensures the polishing efficiency, but also takes into account the surface quality and edge integrity. The multi-stage polishing strategy not only improves the appearance quality of the electric busbar, but also enhances its electrical performance and mechanical strength. This embodiment achieves high efficiency, high precision and high quality of electric busbar surface treatment through key technologies such as precise positioning, stable clamping, mirror polishing, real-time judgment and dynamic execution.

[0034] The above embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A fully automatic grinding device for conductive bars of new energy vehicles, characterized by: It includes a chain transmission mechanism, a grinding transmission mechanism and a grinding mechanism. The chain transmission mechanism is provided with an electric bar clamping mechanism. The electric bar clamping mechanism is provided with multiple groups. The chain transmission mechanism is used to drive the electric bar clamping mechanism for cyclic transmission, and the electric bar clamping mechanism is used to clamp and fix the electric bar; the grinding transmission mechanism is used to drive the grinding mechanism to move; the grinding mechanism includes a mirror transmission module, a grinding drive module and an alloy grinding wheel. There are two groups of grinding drive modules relatively arranged. The two groups of grinding drive modules are arranged on the mirror transmission module. The mirror transmission module is used to drive the two groups of grinding drive modules to move relative to each other in a mirrored manner, so as to grind the two sides of the electric bar; the alloy grinding wheel is a conductive wheel. When contacting the electric bar, the two groups of alloy grinding wheels are electrically connected to determine whether the electric bar is to be ground.

2. The fully automatic grinding device for conductive bars of new energy vehicles according to claim 1 is characterized in that: The chain transmission mechanism includes a fixed panel, a ring track, a ring chain and a transmission drive module. The ring track is arranged on the fixed panel, the electric bar clamping mechanism is arranged on the ring track and slides along the ring track, the ring chain is arranged on the fixed panel, and the transmission drive module is arranged on the fixed panel and is used to drive the ring chain transmission. One side of the electric bar clamping mechanism is connected to the ring chain so as to slide along the ring track under the action of the transmission drive module.

3. The fully automatic grinding device for conductive bars of new energy vehicles according to claim 2 is characterized in that: A movable positioning module is provided on the fixed panel, and the movable positioning module is used to position the electric bar clamping mechanism on the circular track; the movable positioning module includes a positioning drive cylinder, a positioning rotating connecting rod and a movable block, and the movable block is provided with a positioning pin, and the electric bar clamping mechanism is provided with a positioning groove to cooperate with the positioning pin; the positioning drive cylinder is provided on the fixed panel, the positioning rotating connecting rod is provided with a positioning sleeve, and is provided on the fixed panel through the positioning sleeve, and the movable block is provided on the positioning connecting rod, and the positioning drive cylinder is used to drive the positioning rotating connecting rod to rotate, so as to drive the movable block to move toward the electric bar clamping mechanism, so that the positioning pin cooperates with the positioning groove.

4. The fully automatic grinding device for conductive bars of new energy vehicles according to claim 1 is characterized in that: The electric busbar clamping mechanism includes a clamping slider, a clamping jig, a clamping support seat, a first clamping drive module and a second clamping drive module. The clamping slider is arranged on the chain transmission mechanism, the clamping jig is arranged on the clamping slider, the clamping support seat is arranged on the clamping slider and opposite to the clamping jig, the clamping jig is used to fix the rear end of the electric busbar, the first clamping drive module is used to drive the first clamping plate to clamp the side of the electric busbar and fix it on the clamping support seat, and the second clamping drive module is used to drive the second clamping plate to clamp and fix the surface of the electric busbar on the clamping support seat.

5. The fully automatic grinding device for conductive bars of new energy vehicles according to claim 1 is characterized in that: The mirror transmission module drives the grinding drive module to move relatively toward two sides of the electric strip according to the electrical conduction of the alloy grinding wheel, and grinds the electric strip through the alloy grinding wheel.

6. The fully automatic grinding device for conductive bars of new energy vehicles according to claim 1 is characterized in that: The grinding transmission mechanism includes a fixed base and an XZ-axis transmission module. The fixed base is a cast iron base. The XZ-axis transmission module is arranged on the fixed base. The mirror transmission module is arranged on the fixed base. The XZ-axis transmission module is used to drive the mirror transmission module to drive the alloy grinding wheel to move toward the electric row fixing device.

7. The fully automatic grinding device for conductive bars of new energy vehicles according to claim 1 is characterized in that: The mirror transmission module is a synchronous belt transmission module, and the two sets of grinding drive modules are respectively arranged on the bidirectional transmission sides of the synchronous belt, which drive the two sets of grinding drive modules to drive in a mirror manner during synchronous belt transmission; the grinding drive module is a servo motor, and the driving end of the servo motor is provided with a grinding spindle, and the alloy grinding wheel is provided on the grinding spindle.

8. The fully automatic grinding device for conductive bars of new energy vehicles according to claim 1 is characterized in that: The cross-sectional shape of the alloy grinding wheel is tower-shaped. The alloy grinding wheel includes a tower-shaped frame and a grinding ring. The tower-shaped frame is used to connect the grinding spindle. The grinding ring is arranged at the end of the tower-shaped frame to grind the electric bar and remove the oxide layer on the surface of the electric bar.

9. The fully automatic grinding device for conductive bars of new energy vehicles according to claim 1, characterized in that: A protective cover is provided on the outside of the alloy grinding wheel, and a dust suction pipe is provided on the outside of the protective cover. The dust suction pipe is used for collecting dust generated by the alloy grinding wheel during the grinding process.

10. An automatic grinding method for conductive bars of new energy vehicles based on the fully automatic grinding device for conductive bars according to any one of claims 1 to 9, characterized in that: The following steps are included Step S1. Transmission and Positioning: A chain transmission mechanism drives multiple sets of electric bar clamping mechanisms to circulate along a circular track. When the target electric bar clamping mechanism moves to the grinding station, the positioning drive cylinder of the mobile positioning module drives the positioning rotary connecting rod to rotate, driving the positioning pin on the movable block to insert into the positioning groove of the electric bar clamping mechanism, achieving precise positioning of the tooling; Step S2. Layered clamping and fixing: The first clamping drive module drives the first clamping plate to clamp the side of the power bar, and the second clamping drive module drives the second clamping plate to press the surface of the power bar, so that the rear end of the power bar is fixed between the clamping fixture and the clamping support seat; Step S3. Mirror feed: The mirror drive module is driven by the XZ axis drive module to move as a whole, so that the two sets of alloy grinding wheels approach the end surface to be polished by the electric row; Step S4. Synchronous mirror polishing: Start the synchronous belt drive of the mirror drive module to drive the two sets of polishing drive modules to move relative to each other in a mirrored manner, while the servo motor drives the alloy polishing wheel to rotate at high speed; Step S5. Real-time conductivity determination: When two sets of alloy grinding wheels simultaneously contact the surfaces of both sides of the electrode, an electrical conduction loop is formed, triggering the grinding depth control signal. The electrical conduction signal is detected and verified: the contact pressure reaches 0.5-0.8MPa; the current intensity is stable in the range of 5-20mA; the signal duration is ≥10ms; if the conditions are met, the reference zero point calibration is triggered; Step S6. Dynamic grinding execution: Using the electrical conduction trigger position as the reference zero point, the mirror transmission module is controlled to drive the alloy grinding wheel to synchronously feed according to the preset compensation amount Δd, and the pyramidal grinding ring is used to remove the oxide layer on the surface of the electrode. Perform layered feeding according to the aluminum row grinding process: Rough grinding stage: feed compensation amount Δd1 at a speed of 0.8-1.2 mm / s to remove the oxide layer; Fine grinding stage: reduce the speed to 0.3-0.5 mm / s and feed Δd2, and control the surface roughness Ra≤1.6 μm; Edge processing: Drive the mirror transmission module to tilt the angle θ, and add the compensation amount Δd_e=0.1-0.2mm for chamfering.

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