Positioning clamping table for welding processing of battery box frame

Abstract

The invention relates to the technical field of battery box frame welding, in particular to a positioning clamping table for battery box frame welding machining. Comprising a base frame and a welding frame capable of moving on the base frame in a three-axis mode, and further comprises an oscillation generation system, an oscillation frame which vibrates in a reciprocating mode in the vertical direction is connected to the oscillation generation system in a transmission mode, the vibration stroke and frequency of the oscillation frame are adjustable, and a servo motor, a three-axis acceleration sensor and four clamping systems arranged in a circumferential array mode are installed on the oscillation frame. The clamping system comprises a driving clamping base, an elastic clamping frame and a transmission lead screw rotationally connected to the oscillation frame, and the driving clamping base and the elastic clamping frame are both in sliding connection with the oscillation frame. The vibration stroke and frequency of the oscillation frame can be accurately adjusted through the oscillation generation system, and the problems that vibration parameters of a traditional positioning clamping table are fixed, and the traditional positioning clamping table cannot meet the requirements of different procedures such as welding slag cleaning and welding strength detection are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery box frame welding, in particular to a positioning and clamping table for battery box frame welding machining. BACKGROUND

[0002] In the field of battery box frame welding machining, the performance of the positioning and clamping equipment directly affects the welding precision, efficiency and product quality. At present, the existing positioning and clamping table has many technical limitations and cannot meet the high-precision and intelligent machining requirements. The main problems are as follows: Firstly, the vibration adjustment capability of the traditional positioning and clamping table is insufficient. During the welding process, the slag cleaning and welding strength detection processes have different requirements for the vibration parameters of the battery box frame. However, the existing equipment mostly uses fixed vibration parameters or structures that cannot be flexibly adjusted, which cannot dynamically adapt to the machining stage, resulting in poor adaptability of the single equipment and difficulty in meeting the needs of different processes, affecting the machining efficiency and quality stability. Secondly, the transmission precision and synchronicity of the clamping system are poor. The driving mode of the existing clamping device is mostly direct connection or belt transmission, which has low transmission efficiency and insufficient position adjustment precision, and it is difficult to achieve multi-surface synchronous clamping. For the polyhedral structure of the battery box frame, welding misalignment may occur due to asynchronous clamping or positioning deviation, affecting the structural stability of the frame. Thirdly, the clamping force control lacks precise feedback mechanism. The traditional clamping device mostly relies on experience to set the clamping force and lacks real-time monitoring and dynamic adjustment capability. Fourthly, the slag cleaning method is low in intelligent degree. In the existing technology, slag cleaning mostly relies on manual or fixed parameter mechanical cleaning and airflow cleaning, which cannot adjust the cleaning intensity according to the actual state of the slag. Fifthly, the welding strength detection means has limitations. The traditional detection is mostly static pressure testing, which cannot simulate the dynamic vibration working conditions that the battery box frame may encounter in actual use, making it difficult to fully evaluate the reliability of the welded parts in complex stress scenarios and easily missing potential welding defects, which poses a risk to the safety of product use. Therefore, the present application provides a positioning and clamping table for battery box frame welding machining to solve the problems in the background technology. SUMMARY

[0003] The present application provides a positioning and clamping table for battery box frame welding machining to solve the problems in the background technology.

[0004] To achieve the above purpose, the technical solution adopted by the present application is as follows: a positioning and clamping table for battery box frame welding machining, comprising a base frame and a welding frame that can move in three axes on the base frame, further comprising: The oscillation generating system is provided with an oscillation frame reciprocating in a vertical direction, the oscillation stroke and frequency of the oscillation frame are adjustable, and the oscillation frame is provided with a servo motor, a three-axis acceleration sensor and four clamping systems arranged in a circular array; The clamping system comprises a driving clamping seat, an elastic clamping frame and a transmission screw rod rotatably connected to the oscillation frame, the driving clamping seat and the elastic clamping frame are slidably connected to the oscillation frame, the transmission screw rod is drivingly connected to the driving clamping seat, the first profiling spring is arranged between the driving clamping seat and the elastic clamping frame, the transmission screw rod is driven by the servo motor, the elastic clamping frame is provided with a clamping piece, the clamping piece is drivingly connected with two symmetrical clamping plates with adjustable spacing, a group of T-shaped clamping rods are slidably arranged on each clamping plate, a silica gel chuck is arranged at the end of the T-shaped clamping rod, and a second profiling spring is arranged on the T-shaped clamping rod and corresponds to the position between the silica gel chuck and the clamping plate. The welding frame is provided with a work station rotating shell driven by a rotary motor, and the work station rotating shell is respectively provided with a detection pressure rod, a welding gun, a cleaning rod, a visual thermal imager and a gas cleaning nozzle.

[0005] As a preferred technical scheme of the present application, the clamping piece comprises a bidirectional screw rod rotatably connected to the elastic clamping frame and a driving motor fixedly installed on the side surface of the elastic clamping frame, the output shaft end of the driving motor is fixedly connected with the bidirectional screw rod, the bidirectional screw rod is symmetrically provided with a right thread area and a reverse thread area, the right thread area and the reverse thread area are drivingly connected with the two clamping plates on the elastic clamping frame, and the two clamping plates are slidably connected with the elastic clamping frame.

[0006] As a preferred technical scheme of the present application, the top of the base frame is provided with a three-axis motion platform, the three-axis motion platform is drivingly connected with the welding frame, the base frame is provided with a PLC controller, and the data ends of the visual thermal imager and the three-axis acceleration sensor are data-connected with the PLC controller.

[0007] As a preferred technical scheme of the present application, the top of the base frame is provided with an electric arc welding machine, the electric arc welding machine is connected with the welding gun through a cable, the work station rotating shell is provided with a blower, and the air outlet port of the blower is in communication with the air inlet end of the gas cleaning nozzle.

[0008] As a preferred technical scheme of the present application, the silica gel chuck is made of silica rubber, a first pressure sensor is integratedly installed in the silica gel chuck, the signal output end of the first pressure sensor is data-connected with the PLC controller through a wireless transmission module, a second pressure sensor is arranged at the connection position of the detection pressure rod and the work station rotating shell, and the signal data end of the second pressure sensor is data-connected with the PLC controller through a cable.

[0009] As the preferred technical scheme of the present application, the oscillation generating system comprises a base frame, a inner frame installed on the base frame, a linear drive module installed on the inner frame, a six-prong shaft rotatably installed on the inner frame, a transmission motor installed on the inner frame, an output shaft end of the transmission motor in transmission connection with the six-prong shaft, a vibration adjusting seat in transmission connection on the linear drive module, a conical transmission body rotatably installed on the vibration adjusting seat, the conical transmission body in linkage with the six-prong shaft, a transmission frame in sliding connection with the oscillation frame, a set of elastic abutting members installed between the transmission frame and the oscillation frame, the oscillation frame in sliding connection with the inner frame, and two return springs installed on the bottom surface of the oscillation frame and limited by the inner frame.

[0010] As the preferred technical scheme of the present application, the central angle of the conical transmission body is 180°, the longitudinal section of the conical transmission body is isosceles trapezoidal, the conical transmission body and the transmission frame are both provided with inclined tooth tracks, the axis of the conical transmission body is fixedly provided with a six-prong through slot with two open ends, the six-prong through slot is in sliding connection with the six-prong shaft, and the cross sections of the six-prong through slot and the six-prong shaft are both regular hexagons.

[0011] As the preferred technical scheme of the present application, the elastic abutting member comprises a T-shaped limiting rod installed on the transmission frame, the T-shaped limiting rod is in sliding connection with the oscillation frame, an abutting spring is sleeved on the T-shaped limiting rod and corresponds to the position between the transmission frame and the oscillation frame, and the axis of the T-shaped limiting rod is perpendicular to the axis of the six-prong shaft.

[0012] As the preferred technical scheme of the present application, the output shaft end of the servo motor is installed with a driving bevel gear, and the transmission screw rod is installed with a driven bevel gear in transmission connection with the driving bevel gear.

[0013] As the preferred technical scheme of the present application, a set of telescopic pipes are installed between the oscillation frame and the base frame, a buffer spring is sleeved on the telescopic section of each telescopic pipe, steel wire bristles are uniformly distributed on the cleaning brush rod, and the length of the steel wire bristles is 0.45 times of the diameter of the cleaning brush rod.

[0014] Compared with the prior art, the present application has the beneficial effects that: 1. The application realizes the precise adjustment of the vibration stroke and frequency of the oscillation frame through the oscillation generating system, solves the problem of fixed vibration parameters of the traditional positioning and clamping table that cannot adapt to different process requirements such as slag cleaning and welding strength detection, the oscillation generating system adjusts the contact position of the tapered transmission body and the transmission frame through the linear drive module to change the vibration stroke, cooperates with the transmission motor speed to adjust the frequency, and the three-axis acceleration sensor is connected in parallel to monitor the vibration state in real time, the data is fed back to the PLC controller to form a closed-loop control, the first preset frequency and stroke are maintained during slag cleaning, the vibration inertia is used to assist the slag to separate, the vibration parameters are cyclically changed during strength detection to simulate the actual working condition, and one device is dynamically adapted to multiple parameters, the linkage of this adjustability and intelligent feedback improves the universality and process adaptability of the equipment compared with the traditional fixed vibration structure, and lays a foundation for efficient processing.

[0015] 2. The application adopts a cooperative structure of single servo motor, bevel gear split, and circumferential array clamping, the servo motor synchronously drives four driven bevel gears through the driving bevel gear, drives four groups of transmission lead screws to rotate, synchronously moves the driving clamping seat of the four clamping systems, and the first profiling spring between the driving clamping seat and the elastic clamping frame, the T-shaped clamping rod on the clamping plate, and the second profiling spring form multi-stage profiling buffering, adapt to the small size error of the polyhedral structure of the battery box frame, this design realizes the time synchronization and position synchronization of four-face clamping, cooperates with the clamping piece to quickly adjust the clamping plate spacing, improves the transmission accuracy compared with the traditional direct connection or belt transmission clamping device, avoids the welding misplacement caused by clamping deviation, and guarantees the structural stability of the battery frame during welding.

[0016] 3. The application realizes breakthrough through the linkage system of the first pressure sensor, the PLC controller and the silica gel chuck, the first pressure sensor in the silica gel chuck detects the clamping force in real time, the data is transmitted to the PLC controller wirelessly, the controller adjusts the servo motor output according to the preset threshold value, dynamically adjusts the feeding amount of the driving clamping seat, and the silica gel chuck made of silica rubber material has elasticity and wear resistance, which can avoid scratching the battery box frame and enhance the clamping friction force. Compared with the traditional feedback-free structure, the closed-loop mechanism of detection, feedback and adjustment improves the clamping force control accuracy, effectively reduces the damage rate of the battery box frame, ensures the stability of the battery box frame during welding, and improves the processing safety and quality stability.

[0017] 4、In view of the problems of traditional welding slag cleaning relying on manual or fixed parameters and incomplete cleaning, the application constructs a collaborative system of visual thermal imager, oscillating frame, cleaning brush rod and air cleaning nozzle, the visual thermal imager detects the temperature and state of the welding slag in real time, feeds back to the PLC controller, and controls the oscillating frame to adapt to the frequency vibration to loosen the welding slag, the steel wire brush of the cleaning brush rod physically cleans, and the air cleaning nozzle blows off the residual welding slag by the high-pressure airflow of the air blower, the three linkages form a multi-dimensional cleaning mechanism of vibration assistance, mechanical cleaning and airflow blowing, compared with the traditional single cleaning mode, the welding slag removal rate is improved, and the intensity can be dynamically adjusted according to the state of the welding slag, so that the welding seam is prevented from being damaged by excessive cleaning, and intelligent and efficient cleaning is realized.

[0018] 5、The application adopts the linkage scheme of the detection pressure rod, the oscillating frame and the second pressure sensor, the detection pressure rod applies pressure to the welding position, the oscillating frame cyclically changes vibration parameters according to a preset program, the dynamic stress of the battery box frame in transportation and use is simulated, the second pressure sensor detects the pressure change in real time and feeds back to the PLC controller, the reliability of the welding position is judged by analyzing the fluctuation of the force, the dynamic detection mode can expose potential welding defects more than the static test, the product safety hidden danger exclusion rate is improved, and strong guarantee is provided for the actual use safety of the battery box frame. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a whole structure schematic view of a positioning and clamping table for battery box frame welding processing; Figure 2 It is a structure schematic view of the oscillating frame and the clamping piece; Figure 3 It is a structure schematic view of the transmission screw rod and the oscillating frame; Figure 4 It is Figure 3 It is a partial enlarged structure schematic view of A in the middle; Figure 5 It is a structure schematic view of the T-shaped clamping rod and the clamping piece; Figure 6 It is a structure schematic view of the transmission motor and the linear driving module; Figure 7 It is Figure 6 It is a partial enlarged structure schematic view of B in the middle; Figure 8 It is a structure schematic view of the three-axis motion platform and the rotating motor; Figure 9 It is a structure schematic view of the detection pressure rod and the air cleaning nozzle.

[0020] In the drawings, the component list represented by each sign is as follows: 1, pedestal; 2, welding frame; 3, oscillation frame; 4, servo motor; 5, three-axis acceleration sensor; 6, active clamp seat; 7, elastic clamp frame; 8, transmission screw; 9, first profiling spring; 10, clamping plate; 11, T-shaped clamp rod; 12, silica gel chuck; 13, second profiling spring; 14, rotary motor; 15, work station rotating shell; 16, detection pressure rod; 17, welding gun; 18, brush cleaning rod; 19, visual thermal imager; 20, air cleaning nozzle; 21, clamping part; 22, three-axis motion platform; 23, PLC controller; 24, electric arc welding machine; 25, inner frame; 26, linear drive module; 27, six-sided shaft; 28, transmission motor; 29, vibration adjusting seat; 30, conical transmission body; 31, transmission frame; 32, elastic abutting part; 33, return spring; 34, telescopic pipe; 35, buffer spring; 36, air blower. DETAILED DESCRIPTION

[0021] The principles and features of the present application are described below in conjunction with the accompanying drawings, and the examples are only used to explain the present application and are not intended to limit the scope of the present application.

[0022] The present application provides the following preferred embodiments As Figures 1-9 shown, a positioning and clamping table for battery box frame welding processing includes a pedestal 1 and a welding frame 2 that can move in three axes on the pedestal 1, and a three-axis motion platform 22 is installed on the top of the pedestal 1, the three-axis motion platform 22 is in transmission connection with the welding frame 2, and a PLC controller 23 is installed on the pedestal 1. Further comprising: An oscillation generating system, the oscillation generating system is in transmission connection with an oscillation frame 3 that reciprocates in a vertical direction, and the oscillation stroke and frequency of the oscillation frame 3 are adjustable; A set of telescopic pipes 34 are installed between the oscillation frame 3 and the pedestal 1, and a buffer spring 35 is sleeved on the telescopic section of each telescopic pipe 34; When the oscillation frame 3 reciprocates in the vertical direction, the telescopic pipe 34 synchronously performs a telescopic action with the movement of the oscillation frame 3, and the buffer spring 35 sleeved on the telescopic section will be compressed or elongated due to the vibration of the oscillation frame 3, thereby absorbing and buffering the impact force generated when the oscillation frame 3 vibrates; The arrangement of the telescopic pipe 34 and the buffer spring 35 can avoid the vibration of the oscillation frame 3 being directly transmitted to the pedestal 1, prevent the whole pedestal 1 from vibrating violently and affecting the stability and service life of the equipment, and reduce the interference of the vibration on the welding frame 2, the positioning system and other components; The guiding effect of the telescopic pipe 34 ensures the stability of the vibration direction of the oscillation frame 3, and the buffer spring 35 effectively attenuates the vibration energy, thereby improving the overall structural stability of the equipment, prolonging the service life of each component, and providing a stable basis for precise machining; The oscillation generating system includes an inner frame 25 installed on the pedestal 1; The oscillation frame 3 is in sliding connection with the inner frame 25, and the bottom surface of the oscillation frame 3 is provided with two return springs 33 limited by the inner frame 25; The inner frame 25 is provided with a linear driving module 26 and a six-rib shaft 27 rotatably installed thereon, and the inner frame 25 is provided with a transmission motor 28, and the output shaft end of the transmission motor 28 is in transmission connection with the six-rib shaft 27; The linear driving module 26 is in transmission connection with a vibration adjusting seat 29, the vibration adjusting seat 29 is rotatably provided with a conical transmission body 30, and the conical transmission body 30 is linked with the six-rib shaft 27; The central angle of the conical transmission body 30 is 180°, and the longitudinal section of the conical transmission body 30 is an isosceles trapezoid; The conical transmission body 30 is provided with a six-rib through slot with two open ends at the position of the axis, the six-rib through slot is in sliding connection with the six-rib shaft 27, and the cross sections of the six-rib through slot and the six-rib shaft 27 are regular hexagons; The oscillation frame 3 is in sliding connection with a transmission frame 31, and a group of elastic abutting pieces 32 are installed between the transmission frame 31 and the oscillation frame 3; The conical transmission body 30 and the transmission frame 31 are both provided with oblique tooth tracks.

[0023] The elastic abutting piece 32 comprises a T-shaped limiting rod installed on the transmission frame 31, the T-shaped limiting rod is in sliding connection with the oscillation frame 3, an abutting spring is sleeved on the T-shaped limiting rod and corresponds to the position between the transmission frame 31 and the oscillation frame 3, and the axis of the T-shaped limiting rod is parallel to the horizontal plane; The oscillation frame 3 works in an up-down reciprocating mode; Through the setting of the elastic abutting piece 32, the conical transmission body 30 and the transmission frame 31 are kept close and maintain a set degree of friction; The transmission motor 28 and the linear driving module 26 of the oscillation generation system are electrically connected with the PLC controller 23, so as to realize programmable control of vibration parameters; After welding, the visual thermal imager 19 detects the temperature of the welding slag, the surface image of the welding slag and the yield of the welding seam in real time through infrared thermal imaging means and visual detection means; The data monitored by the visual thermal imager 19 is fed back to the PLC controller 23 in real time, and the PLC controller 23 feeds back according to the visual thermal imager 19, so as to maintain the first preset oscillation frequency and oscillation stroke of the oscillation frame 3 during the cleaning of the welding slag; The model of the visual thermal imager 19 can be selected as FLIRA400; The transmission motor 28 drives the six-prong shaft 27 to rotate, the six-prong shaft 27 drives the conical transmission body 30 to rotate synchronously through the six-prong through slot, the inclined tooth trace of the conical transmission body 30 is in contact with the inclined tooth trace of the transmission frame 31, the transmission frame 31 is driven to move up and down, and then the oscillation frame 3 is vibrated, the return spring 33 provides a restoring force after the oscillation frame 3 moves downward, and assists the upward movement of the oscillation frame 3, the linear drive module 26 adjusts the position of the vibration adjusting seat 29, changes the contact position of the conical transmission body 30 and the transmission frame 31, and thus adjusts the vibration stroke of the oscillation frame 3, and the frequency is adjustable by cooperating with the speed regulation of the transmission motor 28; The conventional positioning and clamping table cannot adjust the vibration parameters according to the processing requirements including slag cleaning and welding strength detection, so that the single device has poor adaptability and is difficult to meet the requirements of diversified processing procedures; The device realizes flexible adjustment of the vibration stroke and frequency of the oscillation frame 3, can accurately match the vibration parameters according to the different processing stage requirements of positioning before welding, slag cleaning and strength detection, improves the universality and processing pertinence of the device, and provides technical support for efficient and high-quality processing; The oscillation frame 3 is provided with a servo motor 4, a three-axis acceleration sensor 5 and four clamping systems arranged in a circular array; The data ends of the visual thermal imager 19 and the three-axis acceleration sensor 5 are both in data connection with the PLC controller 23; The clamping system comprises a driving clamp seat 6, an elastic clamp frame 7 and a transmission screw rod 8 rotatably connected to the oscillation frame 3, the driving clamp seat 6 and the elastic clamp frame 7 are both in sliding connection with the oscillation frame 3, the transmission screw rod 8 is in transmission connection with the driving clamp seat 6, a first profiling spring 9 is installed between the driving clamp seat 6 and the elastic clamp frame 7, and the transmission screw rod 8 is driven by the servo motor 4; A driving bevel gear is installed at the output shaft end of the servo motor 4, and a driven bevel gear in transmission connection with the driving bevel gear is installed on the transmission screw rod 8; After the servo motor 4 is started, the output shaft drives the driving bevel gear to rotate, the driving bevel gear meshes with the driven bevel gear to drive, power is transmitted to the transmission screw rod 8, the transmission screw rod 8 rotates, the transmission screw rod 8 drives the driving clamp seat 6 to slide along the oscillation frame 3, and the driving clamp seat 6 drives the elastic clamp frame 7 to move synchronously through the first profiling spring 9; The driving mode of the conventional clamping system is mostly direct connection or belt transmission, and there are problems of low transmission efficiency and insufficient position adjustment accuracy, so it is difficult to accurately control the clamping position and affect the welding accuracy of the battery box frame; The device adopts bevel gear transmission, utilizes the characteristics of stable bevel gear transmission and accurate transmission ratio, improves the power transmission efficiency and position adjustment accuracy, and through the accurate control of the servo motor 4, the fine adjustment and accurate positioning of the clamping system position can be realized, so that the battery box frame is ensured to be in the preset position during the welding process, and the stability of the welding quality is improved; And the device through the driving structure of single servo motor 4, realizes the synchronous four side profiled clamping of the battery box frame to be welded; The power of servo motor 4 is distributed through the main drive bevel gear, and then is transmitted to four driven bevel gears to synchronously drive four transmission lead screws 8 to rotate. This transmission design ensures that the power of single servo motor 4 can be evenly and synchronously transmitted to four clamping systems, so that the four side clamping actions are completely synchronized in time, avoiding the clamping deviation caused by power transmission delay; When the four transmission lead screws 8 rotate synchronously, they respectively drive the corresponding driving clamping seat 6 to translate along the sliding track of the oscillating frame 3. Since the structural parameters of the four clamping systems are completely consistent and are precisely controlled by the same servo motor 4, the moving distance and speed of the driving clamping seat 6 are completely the same, thereby realizing the synchronous adjustment of the four side clamping positions. The first profiled spring 9 between the driving clamping seat 6 and the elastic clamping frame 7 has elastic deformation ability. When the four elastic clamping frames 7 approach the battery box frame, if there is a slight size error or irregular shape of the battery box frame, the first profiled spring 9 will automatically expand and contract according to the contact pressure, so that the elastic clamping frame 7 adapts to the actual shape of the frame, avoiding the deformation of the battery box frame or unstable clamping caused by rigid clamping. The two clamping plates 10 on the elastic clamping frame 7 adjust the spacing through the clamping piece 21 to adapt to the width of the battery box frame. The T-shaped clamping rod 11 and the end silicone clamp head 12 on the clamping plate 10 further refine the profiled effect. The silicone clamp head 12 is made of silicone rubber material and has a certain flexibility, which can adhere to the surface texture of the battery box frame. The second profiled spring 13 allows the T-shaped clamping rod 11 to expand and contract slightly, ensuring that multiple silicone clamp heads 12 can simultaneously contact the surface of the battery box frame, dispersing the clamping force and further improving the profiled clamping effect of the device on different specifications of battery box frames. The elastic clamping frame 7 is provided with a clamping piece 21, and the clamping piece 21 is drivingly connected with two symmetrical clamping plates 10 with adjustable spacing. A group of T-shaped clamping rods 11 are slidingly installed on each clamping plate 10. A silicone clamp head 12 is installed at the end of the T-shaped clamping rod 11. A second profiled spring 13 is sleeved on the T-shaped clamping rod 11 and corresponds to the position between the silicone clamp head 12 and the clamping plate 10. The clamping piece 21 includes a bidirectional screw rod rotatingly connected to the elastic clamping frame 7 and a driving motor fixedly installed on the side surface of the elastic clamping frame 7. The output shaft end of the driving motor is fixedly connected with the bidirectional screw rod. The bidirectional screw rod is provided with a positive screw thread area and a reverse screw thread area symmetrically. The positive screw thread area and the reverse screw thread area are respectively drivingly connected with the two clamping plates 10 on the elastic clamping frame 7. The two clamping plates 10 are slidingly connected with the elastic clamping frame 7. The driving motor drives the bidirectional screw rod to rotate, the positive thread area and the reverse thread area of the bidirectional screw rod are respectively in transmission connection with the two clamping plates 10, and the clamping plates 10 are in sliding connection with the elastic clamping frame 7, so that the two clamping plates 10 will make opposite or opposite linear motion along the elastic clamping frame 7 under the driving of the screw rod, thereby quickly adjusting the distance; The silica gel chuck 12 is made of silicone rubber, and the first pressure sensor is integrated and installed in the silica gel chuck 12. The first pressure sensor is a thin film type pressure sensor. When the silica gel chuck 12 contacts the battery box frame, the battery box frame generates a reaction force on the silica gel chuck 12, so that the T-shaped clamping rod 11 slides towards the clamping plate 10, the second profiling spring 13 is compressed, the first pressure sensor detects the clamping force in real time, and sends data to the PLC controller 23 through the wireless transmission module. The traditional clamping device lacks pressure feedback, and is easy to cause deformation and damage of the battery box frame due to excessive clamping force, or loose battery box frame during welding process due to insufficient clamping force, which affects the welding precision and safety. The device realizes real-time monitoring and feedback of the clamping force through the first pressure sensor, and accurately controls the clamping force in a reasonable range through the closed-loop control of the PLC controller 23. The welding frame 2 is provided with a work station rotating shell 15 driven by a rotating motor 14, and the work station rotating shell 15 is provided with a detection pressure rod 16, a welding gun 17, a cleaning rod 18, a visual thermal imager 19 and a gas cleaning nozzle 20.

[0024] The top of the base frame 1 is provided with an arc welding machine 24 connected with the welding gun 17 through a cable, and the work station rotating shell 15 is provided with a blower 36.

[0025] The detection pressure rod 16 is provided with a second pressure sensor at the connection with the work station rotating shell 15, and the signal data end of the second pressure sensor is connected with the PLC controller 23 through a cable.

[0026] The cleaning rod 18 is uniformly provided with steel wire bristles, and the length of the steel wire bristles is 0.45 times the diameter of the cleaning rod 18.

[0027] The visual thermal imager 19 collects the temperature, surface image and good rate data of the welding slag in real time, and transmits the data to the PLC controller 23. According to the state of the welding slag, the controller controls the oscillation generating system to make the oscillation frame 3 maintain the first preset oscillation frequency and stroke, and through vibration, the welding slag is separated from the battery box frame due to the inertial force, which assists the cleaning of the welding slag. Traditional welding slag cleaning relies on manual or fixed parameter mechanical cleaning, which cannot adjust the cleaning intensity according to the actual state of the welding slag, resulting in incomplete cleaning or excessive cleaning damage to the weld; The device realizes intelligent adaptation of the welding slag cleaning process. Through real-time detection by the visual thermal imager 19, the vibration parameters of the oscillation frame 3 are accurately matched with the state of the welding slag, which can efficiently remove the welding slag and avoid damage to the weld due to excessive vibration, thereby improving the efficiency and safety of welding slag cleaning; During the cleaning of the welding slag, the cleaning brush rod 18 moves along the set trajectory, and the steel wire brush physically cleans the welding surface. At the same time, the air blower 36 blows high-pressure air flow through the air cleaning nozzle 20 to blow off the loose welding slag. In this process, the oscillation frame 3 vibrates at a second preset vibration frequency and vibration stroke, so that the welding slag on the surface of the battery box frame is loosened due to vibration and is more easily removed by the cleaning brush rod 18 and the air flow. The PLC controller 23 coordinates the work rhythm of each component according to the feedback of the visual thermal imager 19; In the traditional device, single physical brushing or air flow blowing cannot remove the firmly attached welding slag, and the cleaning efficiency is low. Residual welding slag will affect subsequent processing or product performance; The device forms a multi-dimensional cleaning mechanism through the synergistic effect of physical brushing, air flow blowing and vibration assistance. The second preset vibration frequency and vibration stroke of the oscillation frame 3 enhance the loosening effect of the welding slag. Combined with the mechanical force of the cleaning brush rod 18 and the air flow impact force of the air cleaning nozzle 20, the welding slag cleaning rate and cleaning intensity are greatly improved, ensuring the cleanliness of the welding surface and providing a good foundation for subsequent processes including secondary welding and assembly.

[0028] After the welding slag is removed, the work station rotating shell 15 rotates to align the detection pressure rod 16 with the welding position. The detection pressure rod 16 acts on the welding position with a set pressure. At the same time, the oscillation frequency and vibration stroke of the oscillation frame 3 change cyclically according to the preset program to simulate the vibration stress under different working conditions. The second pressure sensor detects the change of the acting force of the detection pressure rod 16 on the welding position and transmits the data to the PLC controller 23. The welding strength is judged by analyzing the change of the force; Traditional welding strength detection is mostly static detection, which cannot simulate the dynamic stress in the actual use of the battery box frame, and it is difficult to comprehensively evaluate the reliability of the welding quality; The device simulates the vibration working conditions that the battery box frame may encounter in actual use by combining dynamic vibration with pressure detection, realizes dynamic and comprehensive detection of welding strength, the cyclically changed vibration parameters can cover multiple stress scenes, welding defects can be found more accurately, the reliability of product quality detection is improved, and the use safety of the battery box frame is ensured. The PLC controller 23 pre-stores a vibration parameter setting database for slag cleaning and strength detection, and automatically calls according to feedback of the visual thermal imager 19.

[0029] The above is only a preferred embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A positioning and clamping table for battery box frame welding processing, comprising a base frame (1) and a welding frame (2) capable of moving in three axes on the base frame (1), characterized in that, Also include: Oscillation generating system, the oscillation generating system is connected with the oscillation frame (3) which reciprocates in the vertical direction in transmission, the vibration stroke and frequency of the oscillation frame (3) can be adjusted, servo motor (4), three-axis acceleration sensor (5) and four clamping systems arranged in a circular array are installed on the oscillation frame (3); The clamping system includes a driven clamp seat (6), an elastic clamp frame (7) and a transmission screw (8) rotatably connected to the oscillation frame (3), the driven clamp seat (6) and the elastic clamp frame (7) are both slidingly connected with the oscillation frame (3), the transmission screw (8) is drivingly connected with the driven clamp seat (6), a first profiling spring (9) is installed between the driven clamp seat (6) and the elastic clamp frame (7), the transmission screw (8) is driven by the servo motor (4), a clamping piece (21) is installed on the elastic clamp frame (7), two symmetrically arranged and spacing adjustable clamping plates (10) are drivingly connected on the clamping piece (21), a group of T-shaped clamping rods (11) are slidingly installed on each clamping plate (10), a silica gel chuck (12) is installed at the end of the T-shaped clamping rod (11), and a second profiling spring (13) is sleeved on the T-shaped clamping rod (11) and corresponds to the position between the silica gel chuck (12) and the clamping plate (10); The welding frame (2) is provided with a work station rotating shell (15) driven by a rotary motor (14), and the work station rotating shell (15) is provided with a detection pressure rod (16), a welding gun (17), a cleaning rod (18), a visual thermal imager (19) and a gas cleaning nozzle (20) respectively.

2. The positioning and clamping table for battery box frame welding process according to claim 1, characterized in that: The clamping piece (21) includes a bidirectional screw rod rotatably connected to the elastic clamp frame (7) and a driving motor fixedly installed on the side surface of the elastic clamp frame (7), the output shaft end of the driving motor is fixedly connected with the bidirectional screw rod, the bidirectional screw rod is provided with a right thread area and a reverse thread area symmetrically, and the right thread area and the reverse thread area are drivingly connected with the two clamping plates (10) on the elastic clamp frame (7), and the two clamping plates (10) are slidingly connected with the elastic clamp frame (7).

3. The positioning and clamping table for battery box frame welding process according to claim 1, characterized in that: A three-axis motion platform (22) is installed on the top of the base frame (1), the three-axis motion platform (22) is drivingly connected with the welding frame (2), a PLC controller (23) is installed on the base frame (1), and the data ends of the visual thermal imager (19) and the three-axis acceleration sensor (5) are data-connected with the PLC controller (23).

4. The positioning and clamping table for battery box frame welding process according to claim 3, characterized in that: An electric arc welding machine (24) is installed on the top of the base frame (1), the electric arc welding machine (24) is connected with the welding gun (17) through a cable, a blower (36) is installed on the work station rotating shell (15), and an air inlet end of the gas cleaning nozzle (20) is in communication with an air outlet port of the blower (36).

5. The positioning and clamping table for battery box frame welding process according to claim 1, characterized in that: The silica gel chuck (12) is made of silica rubber material, a first pressure sensor is integratedly installed in the silica gel chuck (12), a signal output end of the first pressure sensor is data-connected with the PLC controller through a wireless transmission module, a second pressure sensor is arranged at the connection between the detection pressure rod (16) and the work station rotating shell (15), and a signal data end of the second pressure sensor is data-connected with the PLC controller (23) through a cable.

6. The positioning and clamping table for battery box frame welding process according to claim 1, characterized in that: The oscillation generating system comprises a base frame (1), a inner frame (25) mounted on the base frame (1), a linear drive module (26) mounted on the inner frame (25) and a six-prong shaft (27) rotatably mounted on the inner frame (25), a transmission motor (28) mounted on the inner frame (25), an output shaft end of the transmission motor (28) in transmission connection with the six-prong shaft (27), a vibration adjusting seat (29) in transmission connection with the linear drive module (26), a conical transmission body (30) rotatably mounted on the vibration adjusting seat (29), the conical transmission body (30) in linkage with the six-prong shaft (27), a transmission frame (31) in sliding connection with the oscillation frame (3), a set of elastic abutting members (32) mounted between the transmission frame (31) and the oscillation frame (3), the oscillation frame (3) in sliding connection with the inner frame (25), and two return springs (33) mounted on the bottom surface of the oscillation frame (3) and limited by the inner frame (25).

7. The positioning and clamping table for battery box frame welding process according to claim 6, characterized in that: The central angle of the conical transmission body (30) is 180°, the longitudinal section of the conical transmission body (30) is isosceles trapezoidal, the conical transmission body (30) and the transmission frame (31) are both provided with inclined tooth traces, the conical transmission body (30) is provided with a six-prong through slot with two open ends at the position of the axis, the six-prong through slot is in sliding connection with the six-prong shaft (27), and the six-prong through slot and the six-prong shaft (27) are both in hexagonal cross section.

8. The positioning and clamping table for battery box frame welding process according to claim 6, characterized in that: The elastic abutting member (32) comprises a T-shaped limiting rod mounted on the transmission frame (31), the T-shaped limiting rod is in sliding connection with the oscillation frame (3), and an abutting spring is sleeved on the T-shaped limiting rod and corresponds to the position between the transmission frame (31) and the oscillation frame (3), and the axis of the T-shaped limiting rod is perpendicular to the axis of the six-prong shaft (27).

9. The positioning and clamping table for battery case frame welding process according to claim 1, characterized in that: The output shaft end of the servo motor (4) is provided with a driving bevel gear, and the transmission screw rod (8) is provided with a driven bevel gear in transmission connection with the driving bevel gear.

10. The positioning and clamping table for battery case frame welding process according to claim 1, characterized in that: A set of telescopic pipes (34) are mounted between the oscillation frame (3) and the base frame (1), a buffer spring (35) is sleeved on the telescopic section of each telescopic pipe (34), the cleaning rod (18) is uniformly provided with steel wire bristles, and the length of the steel wire bristles is 0.45 times the diameter of the cleaning rod (18).

Images