Intelligent welding system for vehicle lamps

Abstract

The application discloses a kind of vehicle light intelligent welding systems, it is related to metal welding technical field, its technical points: preheating, welding, heat treatment module are sequentially arranged on rack;Preheating module has two preheating barrels, fixed on rack, built-in first temperature sensor, side wall has first induction heating coil, sensor is according to preheating temperature threshold value control coil start-stop;The fixed frame of welding module is connected with the both ends of rack, roof beam has two corresponding translation components with preheating barrel, movable part connects mechanical arm and robot gripper, middle part has laser welder;The vibration generator of heat treatment module is fixed with rack, and there is heat treatment barrel on it, side wall is equipped with second induction heating coil, built-in second temperature sensor, according to heat treatment temperature threshold value control coil start-stop, there is guide slide in barrel, rack is also fixed with cooling platform, platform has vent, and air cooling component is arranged on both sides of platform;The application can reduce the influence of thermal stress on small car light metal weldment, guarantee welding quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal welding, in particular to an intelligent welding system for vehicle lamps. BACKGROUND

[0002] In the automotive manufacturing industry, vehicle lamps are important safety components and appearance decoration elements of vehicles. The precision and quality of their manufacturing process directly affect the performance and market competitiveness of the entire vehicle. Vehicle lamp welding, as a key link in the production process of vehicle lamps, aims to accurately connect components such as metal parts, plastic lenses, circuit boards, etc., to form a complete vehicle lamp assembly. With the development of the automotive industry towards intelligence, light weight and high precision, vehicle lamp welding technology is also facing unprecedented challenges and opportunities.

[0003] Currently, intelligent welding systems have been widely adopted in the field of vehicle lamp welding. These systems integrate advanced automation control technology, sensor technology, and machine vision technology, aiming to improve welding efficiency, reduce labor costs, and enhance welding quality. Intelligent welding systems can automatically complete welding path planning, welding parameter adjustment, and other operations according to preset programs, significantly improving the automation level of the welding process.

[0004] In the laser welding process, two parts are tightly combined under controlled pressure. The laser beam is precisely focused on the welding area through a light path system composed of mirrors, lenses, or optical fibers. Laser energy penetrates the upper transmission material and is absorbed by the lower absorbing material, which is then converted into heat energy. As the lower material heats up, heat is transferred to the upper material, forming a molten welding zone at the contact interface between the two. Then, the molten material rapidly solidifies, forming a strong joint that firmly connects the two parts together.

[0005] During laser welding, the laser beam is focused on the metal surface with extremely high energy density, causing the metal to rapidly melt and form a molten pool in a very short time. Due to the local and non-uniform heating of the laser, the temperature gradient of the metal around the molten pool is extremely large. During the cooling stage, different parts of the metal cool at different rates, resulting in inconsistent thermal expansion and contraction, which generates thermal stress within the metal.

[0006] Thermal stress exceeding the tensile strength of the metal can cause cracks, reducing the strength and sealing of the joint; it also affects the escape of gas, leading to the formation of pores, reducing the bearing area and mechanical properties. Thermal stress also causes uneven shrinkage, resulting in welding deformation such as bending and twisting, affecting the assembly of high-precision metal parts, increasing costs and cycle time. Especially for the welding of small metal parts in vehicle lamps, the impact of thermal stress in laser welding on the welding quality is even greater due to their small size. SUMMARY

[0007] In order to solve the above technical problems, the purpose of the present application is to provide a car lamp intelligent welding system, which reduces the influence of thermal stress on small car lamp metal welding parts and guarantees the welding quality.

[0008] In order to achieve the above purpose, the present application provides the following technical solutions:

[0009] A car lamp intelligent welding system comprises a rack, a preheating module for heating metal parts, a welding module for metal welding, and a heat treatment module for heat treatment of welding parts are sequentially arranged on the rack.

[0010] The preheating module comprises two preheating barrels fixedly connected with the rack, a first temperature sensor is arranged in the preheating barrel, a first induction heating coil is arranged on the side wall of the preheating barrel, and the first temperature sensor controls the start and stop of the first induction heating coil according to the preheating temperature threshold.

[0011] The welding module comprises a fixed frame connected with both ends of the rack, two parallel translation assemblies are arranged on the top beam of the fixed frame, the translation assemblies correspond to the preheating barrels, a mechanical arm is connected to the movable part of the translation assembly, a robot gripper is connected to the end of the mechanical arm, and a laser welding device is arranged in the middle of the top beam of the fixed frame.

[0012] The heat treatment module comprises a vibration generator fixedly connected with the rack, a heat treatment barrel is arranged on the vibration generator, a second induction heating coil is arranged on the side wall of the heat treatment barrel, a second temperature sensor is arranged in the heat treatment barrel, the second temperature sensor controls the start and stop of the second induction heating coil according to the heat treatment temperature threshold, and a spiral downward guide slide is arranged in the heat treatment barrel.

[0013] The mechanical arm and the robot gripper are used to take out the metal parts from the preheating barrel, clamp and fix the metal parts during laser welding, and put the welded parts into the heat treatment barrel.

[0014] Preferably, the air cooling assembly comprises a heat conduction frame fixedly connected with the edge of the cooling platform, a plurality of heat conduction fins are arranged on the side of the heat conduction frame, and a fan is arranged on the top of the heat conduction frame and faces the cooling platform.

[0015] Preferably, the cooling platform is uniformly provided with a plurality of lifting convex points, the top of the lifting convex point is arc-shaped, the lifting convex point is made of high-temperature-resistant ceramic material, the height of the lifting convex point is 3-5mm, and the spacing between adjacent lifting convex points is 10-15mm.

[0016] Preferably, the preheating barrel and the heat treatment barrel are both made of heat insulation material, the heat insulation material is ceramic fiber cotton, and the thickness of the heat insulation material is 50-80mm; the outer wall of the preheating barrel and the heat treatment barrel is further provided with a heat preservation layer.

[0017] Preferably, the first temperature sensor and the second temperature sensor are both thermocouple temperature sensors, the measurement accuracy of the first temperature sensor and the second temperature sensor is ±1℃, and the first temperature sensor and the second temperature sensor are respectively electrically connected with the controller of the first induction heating coil and the second induction heating coil.

[0018] Preferably, the vibration generator is electromagnetic, the vibration frequency is 10-100Hz, the amplitude is 0.5-5mm, the vibration generator is adjustable, the vibration generator is connected with the heat treatment barrel through a rubber damping pad, a vibration sensor is arranged in the heat treatment barrel, the vibration sensor is electrically connected with the controller of the vibration generator, and the vibration parameters can be adjusted in real time according to a preset vibration range.

[0019] Preferably, the translation assembly is an electric sliding table.

[0020] Preferably, a frosted layer is sprayed on the working surface of the guide slide, the roughness of the frosted layer is Ra3.2-Ra6.3, and the material of the frosted layer is a wear-resistant ceramic coating.

[0021] The present application has the following beneficial effects:

[0022] I. The preheating module reduces the influence of thermal stress and guarantees the welding quality: the preheating module is provided with two preheating barrels, the first temperature sensor and the first induction heating coil are arranged in the preheating barrel, the first temperature sensor is used for controlling the start and stop of the first induction heating coil according to the preheating temperature threshold, and precise preheating of the metal piece is realized. Preheating the metal piece before welding can make the metal piece reach a relatively uniform temperature state before welding, and reduce the thermal stress caused by the large temperature gradient in the welding process. Thermal stress is one of the important factors affecting the welding quality, and excessive thermal stress may cause problems such as deformation and cracking of the welded part. Through the precise temperature control preheating of the preheating module, the influence of thermal stress on the small car lamp metal welded part is effectively reduced, which creates good conditions for the subsequent welding process, thereby guaranteeing the welding quality.

[0023] II. Heat treatment module further reduces thermal stress and improves welding quality: The heat treatment module includes a vibration generator, a heat treatment barrel, a second induction heating coil, a second temperature sensor, a spiral downward guide chute, a cooling platform, and a wind cooling assembly. The second temperature sensor in the heat treatment barrel controls the start and stop of the second induction heating coil according to the heat treatment temperature threshold, achieving precise control of the heat treatment temperature of the welded part. At the same time, the vibration generator drives the heat treatment barrel to vibrate, so that the welded part is uniformly heated during the heat treatment process, further reducing thermal stress caused by uneven temperature. In addition, the welded part slides down the guide chute to the cooling platform, and the evenly distributed air holes on the cooling platform and the wind cooling assembly on the upper and lower sides can uniformly and quickly cool the welded part. This uniform heat treatment and cooling process effectively releases the residual stress generated during welding, further reduces the impact of thermal stress on small car lamp metal welded parts, and significantly improves the welding quality.

[0024] III. Cooling platform and wind cooling assembly optimize cooling to ensure welding quality: The cooling platform is evenly provided with a plurality of air holes, and the upper and lower sides are provided with a wind cooling assembly. The wind cooling assembly includes a heat-conducting frame fixedly connected to the edge of the cooling platform, a plurality of heat-conducting fins are arranged on the side wall of the heat-conducting frame, and a fan is arranged on the top of the heat-conducting frame and faces the cooling platform. The heat-conducting fins are made of aluminum alloy material with high thermal conductivity, and the fan is a variable speed fan whose speed can be adjusted according to cooling requirements. This design can uniformly dissipate heat from the welded part during the cooling process, avoiding the concentration of thermal stress caused by local overheating or overcooling. By reasonably controlling the cooling speed and uniformity, the stability of the welded part during the cooling process is ensured, preventing new thermal stress from being generated due to rapid or uneven cooling, thereby ensuring the welding quality.

[0025] IV. Convex point design on cooling platform reduces stress concentration and maintains welding quality: The cooling platform is evenly provided with a plurality of convex points, the top of the convex point is arc-shaped, made of high-temperature-resistant ceramic material, the height is 3-5mm, and the distance between adjacent convex points is 10-15mm. This design allows the welded part to not directly contact the platform surface on the cooling platform, reducing the contact area between the welded part and the platform, and avoiding stress concentration caused by local contact. At the same time, the arc-shaped top design reduces the friction between the welded part and the convex point, allowing the welded part to shrink and release stress more freely during the cooling process, further maintaining the welding quality.

[0026] V. The preheating barrel and heat treatment barrel are insulated to stabilize the welding environment and ensure quality: The preheating barrel and heat treatment barrel are both made of insulating materials, with ceramic fiber cotton as the insulating material and a thickness of 50-80mm. The outer wall is also provided with a heat preservation layer. This insulation design can effectively reduce heat loss, keeping the temperature in the preheating barrel and heat treatment barrel stable. A stable temperature environment is crucial for reducing thermal stress, as temperature fluctuations can cause uneven expansion and contraction of metal parts, resulting in thermal stress. Through the insulation design, a stable temperature environment is provided for the welding process and heat treatment process, reducing the impact of thermal stress on small car lamp metal weldments and ensuring welding quality.

[0027] VI. Precise temperature sensors achieve precise temperature control, reduce thermal stress, and ensure welding quality: The first and second temperature sensors are both thermocouple temperature sensors with a measurement accuracy of ±1℃. They are electrically connected to the controllers of the first and second induction heating coils, respectively. This high-precision temperature sensor can monitor the temperature in the preheating barrel and heat treatment barrel in real time and accurately, and precisely control the start and stop of the induction heating coil according to the preset temperature threshold, achieving precise temperature control. Precise temperature control can reduce thermal stress caused by temperature deviation during welding, keeping the weldment in a relatively stable temperature state during welding and heat treatment, thereby ensuring welding quality.

[0028] VII. Adjustable parameters of the vibration generator optimize heat treatment, reduce thermal stress, and improve quality: The vibration generator is electromagnetic, with adjustable vibration frequency of 10-100Hz and amplitude of 0.5-5mm. It is connected to the heat treatment barrel through a rubber shock pad, and a vibration sensor is installed in the heat treatment barrel. The vibration sensor is electrically connected to the controller of the vibration generator and can adjust the vibration parameters in real time according to the preset vibration range. Adjustable vibration parameters can be optimized according to the needs of different weldments, allowing the weldment to vibrate uniformly during heat treatment, promoting uniform heat distribution and reducing thermal stress. At the same time, the rubber shock pad can reduce the impact of vibration on the rack and other components, ensuring the stability of the system. By optimizing the vibration parameters, the impact of thermal stress on small car lamp metal weldments is further reduced, improving the welding quality.

[0029] VIII. The design of the abrasive layer on the guide chute ensures the transmission of the weldment and indirectly maintains the welding quality: The working surface of the guide chute is sprayed with an abrasive layer with a roughness of Ra3.2-Ra6.3 and a ceramic coating that is resistant to wear. The design of the abrasive layer increases the friction on the surface of the guide chute, allowing the weldment to be smoothly transported during the sliding process, avoiding additional stress caused by sliding too fast or colliding. Smooth transmission of the weldment indirectly maintains the welding quality, ensuring that the weldment is not damaged during subsequent heat treatment and cooling, thereby ensuring the overall welding quality. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0031] Figure 1 Front view of the first embodiment of the present application.

[0032] Figure 2 Side view of the first embodiment of the present application.

[0033] Figure 3 Sectional view of the preheating barrel and the heat treatment barrel of the first embodiment of the present application.

[0034] Figure 4 Sectional view of the cooling platform of the first embodiment of the present application.

[0035] Figure 5 Sectional view of the heat treatment barrel of the second embodiment of the present application.

[0036] In the drawings: 1, frame; 201, preheating barrel; 202, first temperature sensor; 203, first induction heating coil; 301, fixing frame; 302, translation assembly; 303, mechanical arm; 304, robot gripper; 305, laser welder; 401, vibration generator; 402, heat treatment barrel; 403, second induction heating coil; 404, second temperature sensor; 405, guide slide; 406, vibration sensor; 407, rubber shock pad; 501, cooling platform; 521, heat conduction frame; 522, heat conduction fin; 523, fan; 503, lifting convex point; 504, air hole; 6, heat preservation layer. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0038] First embodiment

[0039] As Figures 1 to 4As shown, a kind of car lamp intelligent welding system, including rack 1, rack 1 is sequentially provided with the preheating module for metal piece heating, welding module for metal welding, heat treatment module for the heat treatment of welding piece;Preheating module includes with the fixed connection of rack 1 preheating barrel 201, preheating barrel 201 quantity is two, preheating barrel 201 is provided with first temperature sensor 202, preheating barrel 201 side wall is provided with first induction heating coil 203, and first temperature sensor 202 according to preheating temperature threshold value controls the start-stop of first induction heating coil 203;Welding module includes with the fixed connection of rack 1 both ends fixed frame 301, and the top beam of fixed frame 301 is provided with two parallel translation components 302, and translation component 302 is corresponding with preheating barrel 201, and the movable part of translation component 302 is connected with mechanical arm 303, and the end of mechanical arm 303 is connected with robot hand 304, and the top beam of fixed frame 301 middle part is provided with laser welder 305;Heat treatment module includes with the fixed connection of rack 1 vibration generator 401, and vibration generator 401 is provided with heat treatment barrel 402, and heat treatment barrel 402 side wall is provided with second induction heating coil 403, and heat treatment barrel 402 is provided with second temperature sensor 404, and second temperature sensor 404 according to heat treatment temperature threshold value controls the start-stop of second induction heating coil 403, and heat treatment barrel 402 is provided with spiral coiled downward guide slide 405;Rack 1 is fixedly connected with cooling platform 501, and multiple air holes 504 are evenly provided on cooling platform 501, and air-cooled component is arranged on the upper and lower sides of cooling platform 501;The outlet of heat treatment barrel 402 is located above cooling platform 501 below guide slide 405.

[0040] As Figures 1 to 4As shown, two preheating barrels 201 of the preheating module are fixed on the rack 1, and a first temperature sensor 202 and a first induction heating coil 203 are arranged in the preheating barrel 201. When the metal piece is placed into the preheating barrel 201, the first temperature sensor 202 monitors the temperature in the preheating barrel 201 in real time. When the temperature is lower than the preset preheating temperature threshold, the first temperature sensor 202 sends a signal to the controller of the first induction heating coil 203 to start the first induction heating coil 203 to heat the metal piece in the preheating barrel 201 by using the principle of induction heating. As the temperature rises, when the preheating temperature threshold is reached, the first temperature sensor 202 sends a signal again to stop the work of the first induction heating coil 203, so that the metal piece reaches a suitable temperature before welding, reduces the thermal stress caused by the sharp change of temperature during welding, and prepares for subsequent welding. The fixing frame 301 of the welding module is connected to both ends of the rack 1, and the translation assembly 302 is arranged on the top beam of the fixing frame 301 and corresponds to the preheating barrel 201. After the preheating of the metal piece in the preheating barrel 201 is completed, the movable part of the translation assembly 302 drives the mechanical arm 303 to move above the preheating barrel 201, and the robot gripper 304 at the end of the mechanical arm 303 grabs the preheated metal piece. The translation assembly 302 continues to move to transport the metal piece to below the laser welder 305 in the middle of the top beam of the fixing frame 301. The laser welder 305 emits a laser beam to weld the two metal pieces, so that they are firmly connected together. The welded piece after welding is placed into the heat treatment barrel 402 of the heat treatment module, and a second temperature sensor 404 and a second induction heating coil 403 are arranged in the heat treatment barrel 402. The second temperature sensor 404 monitors the temperature in the heat treatment barrel 402 in real time, and when the temperature is lower than the preset heat treatment temperature threshold, the second induction heating coil 403 is started to heat the welded piece, and when the temperature reaches the heat treatment temperature threshold, the work of the second induction heating coil 403 is stopped to realize the heat treatment of the welded piece to eliminate the residual stress generated in the welding process. The spiral downward guide slide 405 arranged in the heat treatment barrel 402 enables the welded piece to slowly slide down along the slide. The heat treatment barrel 402 extends below the downward guide slide 405, and the outlet of the heat treatment barrel 402 is located above the cooling platform 501. After the welded piece slides out of the downward guide slide 405, it falls onto the cooling platform 501. The cooling platform 501 is uniformly provided with a plurality of air holes 504, and air cooling assemblies are arranged on the upper and lower sides of the cooling platform 501. The air cooling assemblies generate air flow to cool the welded piece through the air holes 504, so that the welded piece is quickly and uniformly cooled, avoiding the generation of new thermal stress due to uneven cooling, thereby ensuring the welding quality.

[0041] As Figure 1 and Figure 4As shown, the air-cooling assembly includes a heat-conducting frame 521 fixedly connected with the edge of the cooling platform 501, a plurality of heat-conducting fins 522 arranged on the side wall of the heat-conducting frame 521, and a fan 523 arranged on the top of the heat-conducting frame 521 and facing the cooling platform 501. The heat-conducting fins 522 are made of aluminum alloy material with high thermal conductivity, and the fan 523 is a variable-speed fan whose speed can be adjusted according to the cooling requirement. The air-cooling assembly mainly consists of the heat-conducting frame 521 fixedly connected with the edge of the cooling platform 501, the plurality of heat-conducting fins 522 arranged on the side wall of the heat-conducting frame 521, and the fan 523 arranged on the top of the heat-conducting frame 521 and facing the cooling platform 501. When the welding piece falls onto the cooling platform 501 for cooling, the fan 523 starts to work to generate airflow, which directly blows to the welding piece on the cooling platform 501 to accelerate the flow of air on the surface of the welding piece, thereby taking away the heat on the surface of the welding piece to achieve preliminary cooling. The heat-conducting frame 521 and the heat-conducting fins 522 play a role in auxiliary heat dissipation. Since the heat-conducting fins 522 are made of aluminum alloy material with high thermal conductivity, when the heat generated by the welding piece is transferred to the cooling platform 501, part of the heat will be conducted to the heat-conducting frame 521 and the heat-conducting fins 522. The high thermal conductivity of the aluminum alloy material enables the heat to quickly spread on the heat-conducting fins 522, thereby increasing the heat dissipation area. At the same time, the airflow generated by the fan 523 also blows through the heat-conducting fins 522 to take away the heat on the heat-conducting fins 522, thereby further improving the heat dissipation efficiency. Moreover, the fan 523 is a variable-speed fan whose speed can be adjusted according to the cooling requirement. When the temperature of the welding piece is high and needs to be cooled quickly, the speed of the fan 523 is increased to enhance the airflow intensity and accelerate the heat dissipation; when the temperature of the welding piece gradually decreases and does not need to be cooled too quickly, the speed of the fan 523 is reduced to save energy and avoid adverse effects of excessive cooling on the welding piece.

[0042] As Figure 4As shown, the cooling platform 501 is uniformly provided with a plurality of lifting bumps 503, and the top of the lifting bump 503 is arc-shaped; the lifting bump 503 is made of high-temperature-resistant ceramic material, the height is 3-5 mm, and the spacing between adjacent lifting bumps 503 is 10-15 mm; the top of the plurality of lifting bumps 503 uniformly provided on the cooling platform 501 is arc-shaped, and the lifting bump 503 is made of high-temperature-resistant ceramic material. When the welding part is placed on the cooling platform 501, the lifting bump 503 lifts the welding part, so that a certain gap is formed between the welding part and the surface of the cooling platform 501. This design reduces the actual contact area of the welding part and the cooling platform 501, and avoids the local heat accumulation and temperature unevenness caused by the direct contact of the welding part and the cooling platform 501. Because of the spacing between the lifting bumps 503, the airflow can flow more smoothly in the gap between the welding part and the cooling platform 501, further enhancing the convective cooling effect of the air, so that the welding part can be cooled more uniformly. At the same time, the arc-shaped top design can reduce the stress concentration at the contact part of the welding part and the lifting bump 503, preventing damage to the welding part caused by excessive local stress. The ceramic material has the characteristics of high temperature resistance and can withstand high temperature environment without deformation or damage during the cooling process of the welding part, ensuring that the lifting bump 503 can stably play a role. The height of the lifting bump 503 is 3-5 mm, and the spacing between adjacent lifting bumps 503 is 10-15 mm. Such size design can not only ensure the stable placement of the welding part, but also provide enough gap for airflow to flow, achieving good cooling effect.

[0043] As shown in Figure 1 and Figure 3 , the preheating barrel 201 and the heat treatment barrel 402 are made of heat insulation material, the heat insulation material is ceramic fiber cotton, and the thickness is 50-80 mm; the outer wall of the preheating barrel 201 and the heat treatment barrel 402 is also provided with a heat preservation layer 6; the preheating barrel 201 and the heat treatment barrel 402 are made of heat insulation material (ceramic fiber cotton), and the outer wall is also provided with a heat preservation layer 6. The ceramic fiber cotton has excellent heat insulation performance, and a large number of small pores exist in it, which can effectively hinder the conduction of heat. When the metal parts in the preheating barrel 201 are preheated or the welding parts in the heat treatment barrel 402 are heat treated, the ceramic fiber cotton can prevent the heat from quickly dissipating from the barrel to the external environment. The heat preservation layer 6 provided on the outer wall further enhances the heat insulation effect and reduces the heat exchange between the barrel wall and the outside. In this way, the preheating barrel 201 can provide a relatively stable and higher preheating environment for the metal parts, so that the metal parts can be uniformly heated to reach the preset preheating temperature, avoiding the uneven preheating temperature or the failure to reach the requirement due to heat loss, thereby reducing the thermal stress caused by temperature difference during welding. The heat treatment barrel 402 can provide a stable heat treatment temperature environment for the welding part, ensuring that the welding part is heat treated at an appropriate temperature to better eliminate the welding residual stress and ensure the welding quality.

[0044] The first temperature sensor 202 and the second temperature sensor 404 are both thermocouple temperature sensors with a measurement accuracy of ±1℃, and are electrically connected to the controllers of the first induction heating coil 203 and the second induction heating coil 403 respectively.

[0045] As shown in Figure 1 , the first temperature sensor 202 and the second temperature sensor 404 are both thermocouple temperature sensors with a measurement accuracy of ±1℃, and are electrically connected to the controllers of the first induction heating coil 203 and the second induction heating coil 403 respectively. The thermocouple temperature sensor works based on the thermoelectric effect. When the temperature changes, a corresponding thermoelectric potential will be generated at both ends of the thermocouple. By measuring the size of the thermoelectric potential, the temperature value can be accurately determined. During the preheating process, the first temperature sensor 202 monitors the temperature in the preheating barrel 201 in real time. When the temperature in the preheating barrel 201 is lower than the preset preheating temperature threshold, the first temperature sensor 202 converts the detected temperature signal into an electrical signal and transmits it to the controller of the first induction heating coil 203. After receiving the signal, the controller controls the first induction heating coil 203 to start and heat the metal parts in the preheating barrel 201. As the temperature rises, when the first temperature sensor 202 detects that the temperature reaches the preheating temperature threshold, it transmits the signal to the controller again, and the controller controls the first induction heating coil 203 to stop working, thereby realizing accurate control of the preheating temperature. Similarly, during the heat treatment process, the second temperature sensor 404 monitors the temperature in the heat treatment barrel 402 in real time. When the temperature is lower than the preset heat treatment temperature threshold, the second temperature sensor 404 sends a signal to the controller of the second induction heating coil 403 to start the second induction heating coil 403 to heat the welded parts; when the temperature reaches the heat treatment temperature threshold, the signal is sent to stop heating, ensuring the accuracy of the heat treatment temperature, reducing the thermal stress caused by temperature fluctuations, and ensuring the welding quality.

[0046] As shown in Figure 3As shown, the working surface of the guide chute 405 is sprayed with a matte layer, the roughness of which is Ra3.2-Ra6.3, and the material of which is a wear-resistant ceramic coating. The matte layer sprayed on the working surface of the guide chute 405 has a roughness of Ra3.2-Ra6.3 and is made of a wear-resistant ceramic coating. When the welding piece slides down the guide chute 405 after heat treatment, the matte layer increases the friction. The rough surface makes the contact between the welding piece and the chute no longer smooth plane contact, but produces micro convex and concave interlocking, thereby increasing the friction between the two. This increased friction can effectively prevent the welding piece from slipping, shaking and other unstable conditions during sliding, ensuring that the welding piece can slide smoothly and smoothly along the guide chute 405, and finally accurately fall on the cooling platform 501, avoiding the problems of collision and deformation that may occur due to unstable sliding of the welding piece, and helping to ensure the welding quality. At the same time, the ceramic coating has wear-resistant properties, which can maintain the roughness and stability of the surface during the friction process of multiple sliding of the welding piece, prolonging the service life of the guide chute 405.

[0047] The translation assembly 302 is an electric sliding table; an electric sliding table is a device that can realize linear motion, usually composed of motor, screw, guide rail and other components. In the intelligent welding system of the vehicle lamp, the moving part of the electric sliding table is connected with the mechanical arm 303. When it is necessary to move the mechanical arm 303 to grab or place metal pieces or welding pieces, the motor of the electric sliding table is started, and the rotation of the motor is converted into the linear motion of the moving part through the rotation of the screw, thereby driving the mechanical arm 303 to move along the direction of the translation assembly 302. The electric sliding table has the advantages of high positioning accuracy, smooth operation and adjustable speed, and can accurately move the mechanical arm 303 to the specified position, realize the accurate transportation of metal pieces from the preheating barrel 201 to the welding position and the accurate transportation of welding pieces from the welding position to the heat treatment barrel 402 and other positions, ensure the smooth progress of the entire welding process, and improve the welding efficiency and quality.

[0048] Second embodiment

[0049] As Figure 5 shown, the vibration generator 401 is electromagnetic, with a vibration frequency of 10-100 Hz and an amplitude of 0.5-5 mm adjustable, and is connected with the heat treatment barrel 402 through a rubber shock pad 407; the heat treatment barrel 402 is provided with a vibration sensor 406, and the vibration sensor 406 is electrically connected with the controller of the vibration generator 401, and can adjust the vibration parameters in real time according to the preset vibration range.

[0050] As Figure 5As shown, the vibration generator 401 is an electromagnetic type, and its working principle is based on electromagnetic induction. When the controller inputs current to the vibration generator 401, the electromagnetic coil generates an alternating magnetic field, which interacts with the magnetic components inside the vibration generator 401 to generate a periodic electromagnetic force, thereby causing the vibration generator 401 to vibrate. The vibration frequency is 10-100 Hz, and the amplitude is 0.5-5 mm, which can be adjusted, meaning that the vibration parameters of the vibration generator 401 can be accurately controlled by changing the frequency and intensity of the input current. The vibration generator 401 is connected to the heat treatment barrel 402 through a rubber shock pad 407, which has good elasticity and damping performance. It can absorb part of the vibration energy generated by the vibration generator 401, reduce the transmission of vibration to other components such as the rack 1, avoid adverse effects on the entire system due to excessive vibration, and at the same time ensure that the vibration is effectively transmitted to the heat treatment barrel 402, so that the welds in the heat treatment barrel 402 can be subjected to appropriate vibration. The heat treatment barrel 402 is provided with a vibration sensor 406, which can monitor the vibration parameters of the welds in the heat treatment barrel 402 in real time, such as vibration frequency and amplitude, and convert these parameters into electrical signals and transmit them to the controller of the vibration generator 401. The controller compares and analyzes the actual vibration parameters received according to the pre-set vibration range. If the actual vibration parameters exceed the pre-set range, the controller will automatically adjust the current frequency and intensity input to the vibration generator 401, thereby adjusting the vibration parameters of the vibration generator 401 in real time, so that the vibration of the welds always remains within the pre-set reasonable range, better eliminating the residual stress generated by the welds during the welding process, and ensuring the welding quality.

[0051] The above is only a specific embodiment of the present application, but the technical features of the present application are not limited thereto. Any simple change, equivalent replacement or modification made on the basis of the present application to solve the same technical problem and achieve the same technical effect is also covered by the protection scope of the present application.

Claims

1. An intelligent welding system for vehicle lights, characterized in that: Includes a frame (1), on which a preheating module for heating metal parts, a welding module for metal welding, and a heat treatment module for heat treatment of the welded parts are sequentially arranged; The preheating module includes a preheating barrel (201) fixedly connected to the frame (1). There are two preheating barrels (201). A first temperature sensor (202) is installed inside the preheating barrel (201). A first induction heating coil (203) is installed on the side wall of the preheating barrel (201). The first temperature sensor (202) controls the start and stop of the first induction heating coil (203) according to the preheating temperature threshold. The welding module includes a fixed frame (301) connected to both ends of the frame (1). Two parallel translation components (302) are provided on the top beam of the fixed frame (301). The translation components (302) correspond to the preheating barrel (201). The movable part of the translation component (302) is connected to a robotic arm (303). The end of the robotic arm (303) is connected to a robot gripper (304). A laser welder (305) is provided in the middle of the top beam of the fixed frame (301). The heat treatment module includes a vibration generator (401) fixedly connected to the frame (1), a heat treatment barrel (402) is provided on the vibration generator (401), a second induction heating coil (403) is provided on the side wall of the heat treatment barrel (402), a second temperature sensor (404) is provided inside the heat treatment barrel (402), the second temperature sensor (404) controls the start and stop of the second induction heating coil (403) according to the heat treatment temperature threshold, and a spirally coiled downward guide slide (405) is provided inside the heat treatment barrel (402); a cooling platform (501) is fixedly connected to the frame (1), a plurality of ventilation holes (504) are evenly opened on the cooling platform (501), and air-cooling components are provided on both the upper and lower sides of the cooling platform (501); the lower part of the guide slide (405) extends out of the heat treatment barrel (402) and the outlet is located above the cooling platform (501); The robotic arm (303) and robotic gripper (304) are used to remove metal parts from the preheating barrel (201), clamp and fix metal parts during laser welding, and place the welded parts into the heat treatment barrel (402).

2. The intelligent welding system for vehicle lights according to claim 1, characterized in that: The air-cooling assembly includes a heat-conducting frame (521) fixedly connected to the edge of the cooling platform (501). The heat-conducting frame (521) has multiple heat-conducting fins (522) on its sides and a fan (523) facing the cooling platform (501) on its top. The heat-conducting fins (522) are made of aluminum alloy with high thermal conductivity, and the fan (523) is an adjustable speed fan (523) whose speed can be adjusted according to the cooling requirements.

3. The intelligent welding system for vehicle lights according to claim 2, characterized in that: The cooling platform (501) is uniformly provided with a number of lifting protrusions (503), the top of which is arc-shaped; the lifting protrusions (503) are made of high temperature resistant ceramic material, the height of which is 3-5mm, and the distance between adjacent lifting protrusions (503) is 10-15mm.

4. The intelligent welding system for vehicle lights according to claim 1, characterized in that: Both the preheating barrel (201) and the heat treatment barrel (402) are made of heat insulation material, which is ceramic fiber cotton with a thickness of 50-80mm; the outer walls of the preheating barrel (201) and the heat treatment barrel (402) are also provided with a heat insulation layer (6).

5. The intelligent welding system for vehicle lights according to claim 1, characterized in that: The first temperature sensor (202) and the second temperature sensor (404) are both thermocouple temperature sensors with a measurement accuracy of ±1℃. The first temperature sensor (202) and the second temperature sensor (404) are electrically connected to the controllers of the first induction heating coil (203) and the second induction heating coil (403), respectively.

6. The intelligent welding system for vehicle lights according to claim 1, characterized in that: The vibration generator (401) is electromagnetic, with a vibration frequency of 10-100Hz and an amplitude adjustable from 0.5-5mm. It is connected to the heat treatment barrel (402) via a rubber shock-absorbing pad (407). The heat treatment barrel (402) is equipped with a vibration sensor (406), which is electrically connected to the controller of the vibration generator (401). The vibration parameters can be adjusted in real time according to the preset vibration range.

7. The intelligent welding system for vehicle lights according to claim 1, characterized in that: The translation component (302) is configured as an electric slide.

8. The intelligent welding system for vehicle lights according to claim 1, characterized in that: The working surface of the guide slide (405) is coated with a frosted layer, the roughness of which is Ra3.2-Ra6.3, and the material is a wear-resistant ceramic coating.

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