Electric drive controller laser welding system and welding method

Abstract

The invention provides an electric drive controller laser welding system and welding method.The electric drive controller laser welding system comprises a tray used for containing an electric drive controller; the conveying assembly is used for promoting the tray to move in the X-axis direction; the jacking and press-fitting assembly comprises a jacking mechanism and a press-fitting mechanism, the press-fitting mechanism is located above the jacking mechanism, the jacking mechanism is used for jacking the tray, and the press-fitting mechanism is used for press-fitting the electric drive controller on the tray; the laser emitting assembly comprises a composite laser output unit used for conducting laser welding on the electric drive controller. The detection assembly comprises a positioning detection unit, an in-welding detection unit, a laser ranging unit and a post-welding detection unit; and the composite laser output unit is arranged, high-quality welding of the electric drive controller is achieved, the risk of overvoltage and overcurrent is greatly reduced, effective heat conduction is better facilitated, the temperature rise of the electric drive controller structure is reduced, the thermal stability of a device is improved, the service life of the device is prolonged, and the bolt cost and the labor cost are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of laser welding, and in particular to an electric drive controller laser welding system and a welding method. Background Art

[0002] As an important part of new energy vehicles, the electric drive controller plays a key role in energy conversion, motor control, kinetic energy recovery, etc. It is the core component to achieve efficient and safe operation of electric vehicles. At present, the connection method between the positive and negative electrodes and the output copper plate is bolt connection, which has the following problems:

[0003] 1. If the bolt connection is not strong enough, it may cause the connection point to melt or break under high current or high voltage, increasing the risk of overvoltage and overcurrent.

[0004] 2. During the vibration test, the screws are easily loosened, resulting in gaps and causing discharge, leading to unstable current.

[0005] 3. The contact resistance of bolted joints may increase due to oxidation, corrosion or contamination, thereby increasing power loss and heat.

[0006] 4. Bolted connection is not conducive to effective heat conduction, which causes the junction temperature of the electric drive controller to increase, affecting the thermal stability and life of the device.

[0007] 5. Labor costs are too high. Summary of the invention

[0008] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an electric drive controller laser welding system and welding method. The present invention is provided with a composite laser output unit to achieve high-quality welding of the electric drive controller, greatly reduce the risks of overvoltage and overcurrent, and is more conducive to effective heat conduction. The temperature rise of the electric drive controller structure is reduced, the thermal stability and life of the device are improved, and the bolt cost and labor cost are reduced.

[0009] The embodiments of the present invention are implemented by the following technical solutions:

[0010] An electric drive controller laser welding system, comprising:

[0011] A tray for accommodating an electric drive controller;

[0012] A conveying assembly, used to cause the tray to move along the X-axis direction;

[0013] A jacking and press-fitting assembly, wherein the jacking and press-fitting assembly comprises a jacking mechanism and a press-fitting mechanism, wherein the press-fitting mechanism is located above the jacking mechanism, the jacking mechanism is used to jack up the tray, and the press-fitting mechanism is used to press-fit the electric drive controller on the tray;

[0014] A laser output assembly, comprising a composite laser output unit for laser welding the electric drive controller;

[0015] The detection component includes a positioning detection unit, a welding detection unit, a laser ranging unit, and a post-welding detection unit; the positioning detection unit is used to detect the positioning state of the electric drive controller, the welding detection unit is used to detect the welding process and feedback data in real time, the laser ranging unit is used to measure the distance compensation height to ensure the welding focal length, and the post-welding detection unit detects the weld quality of the electric drive controller.

[0016] According to a preferred embodiment, the composite laser output unit comprises a blue light composite laser, and the output beam of the blue light composite laser comprises an inner circle and an outer circle to form a composite light spot.

[0017] According to a preferred embodiment, the infrared light wavelength of the inner circle is 1080 nm, and the blue light wavelength of the outer circle is 455 nm.

[0018] According to a preferred embodiment, the core diameter of the inner circle is 20 μm, and the core diameter of the outer circle is 600 μm.

[0019] According to a preferred embodiment, it also includes a gantry and a front three-axis moving assembly, wherein the front three-axis moving assembly is arranged on the gantry, and the front three-axis moving assembly includes a front X-axis moving mechanism for adjusting the position of the laser emitting assembly in the X-axis direction, a front Y-axis moving mechanism for adjusting the position of the laser emitting assembly in the Y-axis direction, and a front Z-axis moving mechanism for adjusting the position of the laser emitting assembly in the Z-axis direction.

[0020] According to a preferred embodiment, the press-fitting mechanism is arranged on the gantry, and the press-fitting mechanism is provided with a press-fitting plate.

[0021] The welding detection unit is arranged at one side of the composite laser output unit, and the positioning detection unit is arranged above the pressing plate.

[0022] According to a preferred embodiment, it also includes a frame and a rear three-axis moving assembly, the frame is located on one side of the gantry, the rear three-axis moving assembly is arranged on the gantry, and the rear three-axis moving assembly includes a rear X-axis moving mechanism for adjusting the position of the post-weld inspection unit in the X-axis direction, a rear Y-axis moving mechanism for adjusting the position of the post-weld inspection unit in the Y-axis direction, and a rear Z-axis moving mechanism for adjusting the position of the post-weld inspection unit in the Z-axis direction.

[0023] According to a preferred embodiment, there are two gantries, which are arranged side by side, and the pressing mechanism is horizontally arranged between the two gantries, and both ends of the pressing mechanism are slidably connected to the side walls of the two gantries.

[0024] A welding method for an electric drive controller laser welding system comprises the following steps:

[0025] Step S10, pre-setting the parameters of the blue light composite laser, infrared light power, blue light power, and welding time; setting the galvanometer parameters, welding speed, swing amplitude, swing trajectory, and welding length;

[0026] Step S20, placing the electric drive controller on a tray and transporting it to a welding station corresponding to the laser emission component through a transport component;

[0027] Step S30, the lifting mechanism lifts the tray with the electric drive controller, and the pressing mechanism presses down toward the tray with the electric drive controller, and the lifting mechanism and the pressing mechanism work together to press and position the electric drive controller on the tray;

[0028] Step S40, measuring the welding position of the electric drive controller on the tray by using a laser distance measuring unit, and performing compensation through a PLC program according to the distance measurement value obtained by the laser distance measuring unit to ensure the welding focal length;

[0029] Step S50, the blue light composite laser welds the electric drive controller, during which the welding detection unit continuously monitors the welding process of the electric drive controller. If the welding of the electric drive controller is NG, an alarm is immediately given and the welding is stopped and the process returns to step S20 for welding repair. If there is no alarm, the process proceeds to step S60;

[0030] Step S60, the lifting mechanism controls the pallet to descend, and the pallet is conveyed to the post-weld inspection station through the conveying assembly;

[0031] In step S70, the electric drive controller of the pallet is inspected by the post-weld inspection unit. When the post-weld inspection unit determines that the electric drive controller is NG, an instruction is sent to immediately alarm and return to step S20 for repair. When the post-weld inspection unit determines that the electric drive controller is not NG, it is output through the conveying assembly to end the welding process.

[0032] In step S10, the pre-set parameters of the blue light composite laser are as follows: the infrared light power is 800-2500W, the blue light power is 1000-1800W, and the welding time is 100-500ms;

[0033] The galvanometer parameters are set as follows: the welding speed is 40-80 mm / s, the swing amplitude is 0.8-1.2 mm, the swing trajectory is a spiral line, and the welding length is set according to actual needs.

[0034] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0035] The present invention is provided with a jacking press-fitting assembly, a positioning detection unit, a welding detection unit, a laser ranging unit, and a post-welding detection unit, which can accurately position and comprehensively monitor the electric drive controller. A composite laser output unit is provided to achieve high-quality welding of the electric drive controller, greatly reduce the risks of overvoltage and overcurrent, and is more conducive to effective heat conduction. The temperature rise of the electric drive controller structure is reduced, the thermal stability and life of the device are improved, and the bolt cost and labor cost are reduced; the connection strength of the copper busbar of the drive controller is improved, the long-term stability of the electric drive controller is guaranteed, and the large spatter, oxidation and welding pores of the welding copper are effectively reduced, and the welding effect of the electric drive controller is effectively improved. After welding is completed, the welding surface can be smooth and flat without dust particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 A schematic diagram of the main structure of an electric drive controller laser welding system provided by an embodiment of the present invention;

[0038] Figure 2 A schematic diagram of the rear view structure of an electric drive controller laser welding system provided by an embodiment of the present invention;

[0039] Figure 3 A schematic diagram of the three-dimensional structure of an electric drive controller laser welding system provided by an embodiment of the present invention;

[0040] Figure 4 A flow chart of a welding method of an electric drive controller laser welding system provided by an embodiment of the present invention;

[0041] Figure 5 This is a first welding effect diagram provided in an embodiment of the present invention.

[0042] Figure 6 This is a second welding effect diagram provided in an embodiment of the present invention.

[0043] Icons: 1. Conveying assembly; 2. Pallet; 3. Lifting mechanism; 4. Press-fitting mechanism; 5. Composite laser output unit; 6. Positioning detection unit; 7. In-welding detection unit; 8. Laser ranging unit; 9. Post-welding detection unit; 10. Gantry; 11. Front X-axis moving mechanism; 12. Front Y-axis moving mechanism; 13. Front Z-axis moving mechanism; 14. Frame; 15. Rear X-axis moving mechanism; 16. Rear Y-axis moving mechanism; 17. Rear Z-axis moving mechanism. DETAILED DESCRIPTION

[0044] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0045] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. 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.

[0047] Example

[0048] Please refer to Figures 1 to 6 A laser welding system for an electric drive controller includes: a tray 2 for accommodating an electric drive controller; a conveying component 1 for causing the tray 2 to move along the X-axis direction; a lifting and pressing component, the lifting and pressing component including a lifting mechanism 3 and a pressing mechanism 4, the pressing mechanism 4 is located above the lifting mechanism 3, the lifting mechanism 3 is used to lift the tray 2, and the pressing mechanism 4 is used to press the electric drive controller on the tray 2; a laser emission component including a composite laser output unit 5 for laser welding the electric drive controller; a detection component including a positioning detection unit 6, a welding detection unit 7, a laser ranging unit 8, and a post-welding detection unit 9; the positioning detection unit 6 is used to detect the positioning state of the electric drive controller, the welding detection unit 7 is used to detect the welding process and feedback data in real time, the laser ranging unit 8 is used to measure the distance compensation height to ensure the welding focal length, and the post-welding detection unit 9 detects the weld quality of the electric drive controller.

[0049] According to a preferred embodiment, the composite laser output unit 5 includes a blue light composite laser, and the output beam of the blue light composite laser includes an inner circle and an outer circle to form a composite light spot.

[0050] According to a preferred embodiment, the infrared light wavelength of the inner circle is 1080nm, and the blue light wavelength of the outer circle is 455nm.

[0051] According to a preferred embodiment, the core diameter of the inner circle is 20 μm, and the core diameter of the outer circle is 600 μm.

[0052] According to a preferred embodiment, it also includes a gantry 10 and a front three-axis moving assembly, which is arranged on the gantry 10. The front three-axis moving assembly includes a front X-axis moving mechanism 11 for adjusting the position of the laser emission assembly in the X-axis direction, a front Y-axis moving mechanism 12 for adjusting the position of the laser emission assembly in the Y-axis direction, and a front Z-axis moving mechanism 13 for adjusting the position of the laser emission assembly in the Z-axis direction.

[0053] According to a preferred embodiment, the press-fitting mechanism 4 is arranged on the gantry 10, and the press-fitting mechanism 4 is provided with a press-fitting plate.

[0054] The welding detection unit 7 is arranged at one side of the composite laser output unit 5, and the positioning detection unit 6 is arranged above the press-fit plate.

[0055] According to a preferred embodiment, it also includes a frame 14 and a rear three-axis moving assembly, the frame 14 is located on one side of the gantry 10, the rear three-axis moving assembly is arranged on the gantry 10, and the rear three-axis moving assembly includes a rear X-axis moving mechanism 15 for adjusting the position of the post-weld inspection unit 9 in the X-axis direction, a rear Y-axis moving mechanism 16 for adjusting the position of the post-weld inspection unit 9 in the Y-axis direction, and a rear Z-axis moving mechanism 17 for adjusting the position of the post-weld inspection unit 9 in the Z-axis direction.

[0056] According to a preferred embodiment, there are two gantries 10 , which are arranged side by side. The pressing mechanism 4 is horizontally arranged between the two gantries 10 , and both ends of the pressing mechanism 4 are slidably connected to the side walls of the two gantries 10 .

[0057] A welding method for an electric drive controller laser welding system comprises the following steps:

[0058] Step S10, pre-setting the parameters of the blue light composite laser, infrared light power, blue light power, and welding time; setting the galvanometer parameters, welding speed, swing amplitude, swing trajectory, and welding length;

[0059] Step S20, placing the electric drive controller on the tray 2 and transporting it to the welding station corresponding to the laser emission component through the conveying component 1;

[0060] Step S30, the lifting mechanism 3 lifts the tray 2 with the electric drive controller, and the pressing mechanism 4 presses down toward the tray 2 with the electric drive controller, and the lifting mechanism 3 and the pressing mechanism 4 work together to press and position the electric drive controller on the tray 2;

[0061] Step S40, measuring the welding position of the electric drive controller on the tray 2 by using the laser distance measuring unit 8, and performing compensation through the PLC program according to the distance measurement value obtained by the laser distance measuring unit 8 to ensure the welding focal length;

[0062] Step S50, the blue light composite laser welds the electric drive controller, during which the welding detection unit 7 continuously monitors the welding process of the electric drive controller. If the welding of the electric drive controller is NG, an alarm is immediately given and the welding is stopped and the process returns to step S20 for welding repair. If there is no alarm, the process proceeds to step S60;

[0063] Step S60, the lifting mechanism 3 controls the tray 2 to descend, and the tray 2 is transported to the post-weld inspection station through the conveying assembly 1;

[0064] In step S70, the electric drive controller of the tray 2 is inspected by the post-weld inspection unit 9. When the post-weld inspection unit 9 determines that the electric drive controller is NG, it sends an instruction to immediately alarm and return to step S20 for repair. When the post-weld inspection unit 9 determines that the electric drive controller is not NG, it is output through the conveying component 1 to end the welding process.

[0065] In step S10, the pre-set parameters of the blue light composite laser are as follows: infrared light power is 800-2500W, blue light power is 1000-1800W, and welding time is 100-500ms;

[0066] Set the galvanometer parameters as follows: welding speed is 40-80 mm / s, swing amplitude is 0.8-1.2 mm, spiral is selected as the swing trajectory, and welding length is set according to actual needs.

[0067] Working principle of the present invention:

[0068] like Figure 1As shown, the welded product is an IGBT electric drive controller, and the conveying component 1 can select a double-speed chain, which is used for conveying the pallet 2. The double-speed chain can transport the pallet 2 in the X-axis direction, so as to realize the flow of the IGBT electric drive controller on the pallet 2 and the positioning of the IGBT electric drive controller; the lifting mechanism 3 can select a lifting mechanism such as an electric cylinder or a pneumatic cylinder, which can lift the pallet 2, clamp the IGBT electric drive controller with the pressing mechanism 4, and adjust the pressing force. The reaction force on the pressing plate on the clamping mechanism can be adjusted by adjusting the lifting pressure of the lifting mechanism 3; the positioning detection unit 6 can select a CCD detection camera to detect the positioning state of the IGBT electric drive controller; the front three-axis moving component is a three-axis module, which is used to move the composite laser output unit 5. The composite laser output unit 5 includes a collimating mirror, a galvanometer, a field mirror, a laser emission source, etc. In this embodiment, the laser emission source is Figure 2 As shown, A is the laser emission source; the in-welding detection unit 7 can realize the real-time monitoring of the welding of the IGBT electric drive controller by the composite laser output unit 5 and the welding NG feedback; NG means a failed product, and no NG means a qualified product. The laser ranging unit 8 can be selected as a laser height measurement sensor, which ensures the welding focal length by compensating the height after ranging; the pressing plate of the pressing mechanism 4 is used to clamp the product with the tray 2 after jacking to achieve product positioning; the rear three-axis moving component is a three-axis module, which supports the three-dimensional movement of the 3D detection camera of the IGBT electric drive controller after welding; the post-welding detection unit 9 is a post-welding detection 3D camera, which can effectively detect I GBT electric drive controller welding seam quality and NG alarm; tray 2 is IGBT electric drive controller to achieve product positioning; optical fiber can be used as the optical transmission medium between the laser emission source and the blue light composite laser. In this embodiment, the composite laser output unit 5 is a blue light composite laser, and its output beam forms a composite light spot. The inner circle core diameter of the composite light spot is 20μm, the inner circle infrared light wavelength is 1080nm, the outer circle core diameter is 600μm, the outer circle blue light wavelength is 455nm, the inner ring is infrared light, and the outer ring is blue light. The above value ranges include the values ​​at both ends, such as infrared light power 800~2500W, including 800W and 2500W.

[0069] The electric drive controller in this embodiment is an IGBT electric drive controller. This embodiment adopts infrared light and blue light composite and galvanometer laser welding methods to achieve high-quality welding of the electric drive controller, greatly reduce the risk of overvoltage and overcurrent, and is more conducive to effective heat conduction. The temperature rise of the IGBT electric drive controller structure is reduced, the thermal stability and life of the device are improved, and the bolt cost and labor cost are reduced; the connection strength of the copper busbar of the IGBT electric drive controller is improved, and the long-term stability of the IGBT electric drive controller is ensured. The red and blue light composite welding technology solution is used to solve the problems of large spatter, oxidation and welding pores in the current copper welding in the industry, which effectively improves the welding effect of the IGBT electric drive controller. After welding, the welding surface can be smooth and flat, without dust particles, the effective melt width is ≥1mm, and the effective melt depth is ≥0.2mm.

[0070] The tray 2 in this embodiment is provided with a connection slot for the IGBT electric drive controller, which can accommodate the IGBT electric drive controller and position the IGBT electric drive controller. Figure 1 As shown, the conveying assembly 1 conveys the IGBT electric drive controller of the tray 2 from left to right. When the IGBT electric drive controller is conveyed to the lifting mechanism 3, the conveying assembly 1 stops conveying, and the electric cylinder or air cylinder of the lifting mechanism 3 lifts the tray 2 and the IGBT electric drive controller upward, so that the tray 2 and the IGBT electric drive controller are positioned in coordination with the press plate. Specifically, the welding detection unit 7 and the laser ranging unit 8 are connected to the output end of the composite laser output unit 5, and the moving end of the front Z-axis moving mechanism 13 drives the welding detection unit 7 and the output end of the composite laser output unit 5 (including the collimating mirror, the galvanometer, and the field mirror) to move together, so as to facilitate the adjustment of the welding focal length; the moving end of the front X-axis moving mechanism 11 can drive the front Y-axis moving mechanism 12 to move in the X-axis direction, and the moving end of the front Y-axis moving mechanism 12 can drive the Z-axis moving mechanism to move in the Y-axis direction. Similarly, the rear three-axis moving assembly is used to control the position of the post-welding detection unit 9 in the X-axis, Y-axis, and Z-axis directions, and the post-welding detection unit 9 is arranged on the moving end of the rear Y-axis moving mechanism 16. The post-weld inspection unit 9 is arranged on the rear three-axis moving assembly, and the rear three-axis moving assembly is arranged on the bracket, and the bracket is located on the left side of the gantry 10. When the welding process is completed, that is, after step S70, the qualified IGBT electric drive controller flows out to the right. That is, the welding process is ended, and the qualified IGBT electric drive controller flows out through the conveying assembly 1 if there is no NG. The pressing mechanism 4 is arranged between the two gantries 10. When the tray 2 is conveyed to the bottom of the pressing plate, the lifting mechanism 3 performs a lifting action. The pressing plate is a hollow frame structure to achieve the pressing of the IGBT electric drive controller without affecting the output of the composite laser output unit 5 above the pressing plate. The front Y-axis moving mechanism 12 is located at the top of the gantry 10 and above the pressing mechanism 4. The composite laser output unit 5 can move back and forth above the pressing mechanism 4. Specifically, Figure 5 , Figure 6 This is a welding effect diagram of the product after welding by the welding system and welding scheme of the present invention. In this embodiment, the problem that the incident light spot is too large or the laser divergence angle is too large during the welding process of the IGBT electric drive controller may cause the transmittance to decrease.

[0071] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. An electric drive controller laser welding system, characterized in that: include: A tray for accommodating an electric drive controller; A conveying assembly, used to cause the tray to move along the X-axis direction; A jacking and press-fitting assembly, wherein the jacking and press-fitting assembly comprises a jacking mechanism and a press-fitting mechanism, wherein the press-fitting mechanism is located above the jacking mechanism, the jacking mechanism is used to jack up the tray, and the press-fitting mechanism is used to press-fit the electric drive controller on the tray; A laser output assembly, comprising a composite laser output unit for laser welding the electric drive controller; The detection component includes a positioning detection unit, a welding detection unit, a laser ranging unit, and a post-welding detection unit; the positioning detection unit is used to detect the positioning state of the electric drive controller, the welding detection unit is used to detect the welding process and feedback data in real time, the laser ranging unit is used to measure the distance compensation height to ensure the welding focal length, and the post-welding detection unit detects the weld quality of the electric drive controller.

2. The electric drive controller laser welding system according to claim 1, characterized in that: The composite laser output unit comprises a blue light composite laser, and the output beam of the blue light composite laser comprises an inner circle and an outer circle to form a composite light spot.

3. The electric drive controller laser welding system according to claim 2, characterized in that: The infrared light wavelength of the inner circle is 1080nm, and the blue light wavelength of the outer circle is 455nm.

4. The electric drive controller laser welding system according to claim 3, characterized in that: The core diameter of the inner circle is 20 μm, and the core diameter of the outer circle is 600 μm.

5. The electric drive controller laser welding system according to claim 2, characterized in that: It also includes a gantry and a front three-axis moving component, wherein the front three-axis moving component is arranged on the gantry, and the front three-axis moving component includes a front X-axis moving mechanism for adjusting the position of the laser emitting component in the X-axis direction, a front Y-axis moving mechanism for adjusting the position of the laser emitting component in the Y-axis direction, and a front Z-axis moving mechanism for adjusting the position of the laser emitting component in the Z-axis direction.

6. The electric drive controller laser welding system according to claim 5, characterized in that: The press-fitting mechanism is arranged on the gantry, and the press-fitting mechanism is provided with a press-fitting plate. The welding detection unit is arranged at one side of the composite laser output unit, and the positioning detection unit is arranged above the pressing plate.

7. The electric drive controller laser welding system according to claim 5, characterized in that: It also includes a frame and a rear three-axis moving assembly, the frame is located on one side of the gantry, the rear three-axis moving assembly is arranged on the gantry, and the rear three-axis moving assembly includes a rear X-axis moving mechanism for adjusting the position of the post-weld inspection unit in the X-axis direction, a rear Y-axis moving mechanism for adjusting the position of the post-weld inspection unit in the Y-axis direction, and a rear Z-axis moving mechanism for adjusting the position of the post-weld inspection unit in the Z-axis direction.

8. The electric drive controller laser welding system according to claim 5, characterized in that: There are two gantries, which are arranged side by side. The pressing mechanism is horizontally arranged between the two gantries, and both ends of the pressing mechanism are slidably connected to the side walls of the two gantries.

9. A welding method for an electric drive controller laser welding system, characterized in that: The following steps are involved: Step S10, pre-setting the parameters of the blue light composite laser, infrared light power, blue light power, and welding time; setting the galvanometer parameters, welding speed, swing amplitude, swing trajectory, and welding length; Step S20, placing the electric drive controller on a tray and transporting it to a welding station corresponding to the laser emission component through a transport component; Step S30, the lifting mechanism lifts the tray with the electric drive controller, and the pressing mechanism presses down toward the tray with the electric drive controller, and the lifting mechanism and the pressing mechanism work together to press and position the electric drive controller on the tray; Step S40, measuring the welding position of the electric drive controller on the tray by using a laser distance measuring unit, and performing compensation through a PLC program according to the distance measurement value obtained by the laser distance measuring unit to ensure the welding focal length; Step S50, the blue light composite laser welds the electric drive controller, during which the welding detection unit continuously monitors the welding process of the electric drive controller. If the welding of the electric drive controller is NG, an alarm is immediately given and the welding is stopped and the process returns to step S20 for welding repair. If there is no alarm, the process proceeds to step S60; Step S60, the lifting mechanism controls the pallet to descend, and the pallet is conveyed to the post-weld inspection station through the conveying assembly; In step S70, the electric drive controller of the pallet is inspected by the post-weld inspection unit. When the post-weld inspection unit determines that the electric drive controller is NG, an instruction is sent to immediately alarm and return to step S20 for repair. When the post-weld inspection unit determines that the electric drive controller is not NG, it is output through the conveying assembly to end the welding process.

10. The welding method of the electric drive controller laser welding system according to claim 9, characterized in that In step S10, The pre-set parameters of the blue light composite laser are as follows: the infrared light power is 800-2500W, the blue light power is 1000-1800W, and the welding time is 100-500ms; The galvanometer parameters are set as follows: the welding speed is 40-80 mm / s, the swing amplitude is 0.8-1.2 mm, the swing trajectory is a spiral line, and the welding length is set according to actual needs.

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