Automatic laser welding device

Abstract

The utility model discloses an automatic laser welding device, which relates to the field of automatic laser welding of battery pack cross beams and comprises an electrical control cabinet, a water cooling machine arranged on the side wall of one end of the electrical control cabinet, a voltage-stabilized source arranged on one side of the water cooling machine, and a mechanical arm welding mechanism arranged on one side of the electrical control cabinet. A plurality of welding tool clamps are arranged on the periphery of the mechanical arm welding mechanism so that the tool can be kept stable in the welding process. The welding device is scientific and novel, can improve recognition of position accuracy in the welding process, maintain welding seam stability and automatically weld according to edited programs, welding seams are attractive and uniform in appearance, excess weld metal protrusions are low, the efficiency of the subsequent polishing procedure is improved, in addition, double-station pneumatic design is adopted, manual feeding and discharging time can be saved, and the production efficiency is improved. Manual operation steps are simplified, and the laser welding operation efficiency is improved; the robot automation can reduce professional welding workers and save the enterprise operation cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to the battery pack crossbeam automation laser welding field, concretely related to an automation laser welding device. BACKGROUND

[0002] The increasingly serious environmental problem pushes new energy vehicles to the high-speed channel of development, as a kind of green environmental protection non-pollution new travel traffic tool, the overall weight of vehicle body is one of important factors restricting its development, and the application of lightweight technology will greatly reduce the overall vehicle weight. Battery module is the core component of automobile, and battery tray, as the support of the whole battery module, has also experienced the innovation and development from material to process, and the battery tray with higher reliability and more functions will be the development direction in the future.

[0003] New energy vehicles have been gradually recognized by the public after more than 20 years of development, China's new energy vehicle production and sales rank first in the world and show an upward trend, and China also takes new energy vehicle industry as one of the seven strategic industries. Due to the advantages of high-strength steel, such as corrosion resistance, high temperature resistance, impact resistance, high yield ratio, easy processing and low cost, it is gradually applied in most car enterprises. The battery tray is an important part of the power system of new energy vehicles, which is composed of cross beams and cross beams to form a frame, and is an important guarantee for the safety of the battery system. The battery pack tray cross beam adopts advanced high-strength steel material, and the cross beam shape structure is realized by roll forming. Since the cross beam structure has a notch contour assembly requirement, the secondary assembly processing and manufacturing of the roll-formed mother piece are required. The current manual welding process control is unstable, the efficiency is low, and the production cost is increased.

[0004] At present, no effective solution has been proposed for the problems in the related art. CONTENT OF THE UTILITY MODEL

[0005] In view of the problems in the related art, the utility model provides an automation laser welding device to overcome the above technical problems existing in the prior art.

[0006] Therefore, the utility model adopts the specific technical scheme as follows:

[0007] An automation laser welding device, comprising an electrical control cabinet, a water cooler is arranged on one end side wall of the electrical control cabinet, a stabilizing power supply is arranged on one side of the water cooler, a mechanical arm welding mechanism is arranged on one side of the electrical control cabinet, and a plurality of welding tool clamps are arranged around the mechanical arm welding mechanism to keep the tool stable during welding.

[0008] Further, in order to realize the welding of the tool, and through the camera assembly, the welding process can be monitored in real time, and the water inlet and outlet can form a water cooling structure, which helps to effectively reduce the temperature of the laser welding head during high-temperature welding process, avoids equipment damage due to overheating, and the mechanical arm welding mechanism comprises a base provided on one side of the electrical control cabinet, a mechanical arm body is arranged at the top of the base, a flange mounting adapter shaft is arranged at the tail end of the mechanical arm body, a laser welding head is arranged on one side of the flange mounting adapter shaft, and a camera assembly is arranged on one side of the laser welding head.

[0009] Further, in order to realize the welding of the tool, and through the camera assembly, the welding process can be monitored in real time, and the water inlet and outlet can form a water cooling structure, which helps to effectively reduce the temperature of the laser welding head during high-temperature welding process, avoids equipment damage due to overheating, and the mechanical arm welding mechanism comprises a base provided on one side of the electrical control cabinet, a mechanical arm body is arranged at the top of the base, a flange mounting adapter shaft is arranged at the tail end of the mechanical arm body, a laser welding head is arranged on one side of the flange mounting adapter shaft, and a camera assembly is arranged on one side of the laser welding head.

[0010] The beneficial effects of the utility model are as follows:

[0011] 1、The utility model discloses scientific and novel, and the welding device can improve the identification of welding process position precision, maintains the stability of weld, can also be automatically welded according to the edited program, and the appearance of weld is beautiful and uniform, and the excess height is low, improves subsequent polishing process efficiency, in addition, adopts double-station pneumatic design, can save artificial feeding and discharging time, simplifies manual operation step, improves laser welding operation efficiency, and robot automation can reduce professional welder, saves enterprise operating cost.

[0012] 2、By setting the mechanical arm welding mechanism, so as to realize the welding of the tool, and through the camera assembly can make the welding process can be monitored in real time, and the use of inlet and outlet can form a water cooling structure, help to effectively reduce the temperature of the laser welding joint in the high temperature welding process, avoid damage due to overheating equipment.

[0013] 3、By setting the welding tool fixture, so as to realize the multi-directional fixation of the tool, so as to effectively fix the tool on the fixture, ensure that the tool does not occur any deformation or displacement in the welding process, and further ensure the welding quality. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0015] Figure 1 is a structural schematic view of an automatic laser welding device according to an embodiment of the present application;

[0016] Figure 2 is a structural schematic view of a welding tool fixture in an automatic laser welding device according to an embodiment of the present application;

[0017] Figure 3 is Figure 2 a local enlarged view of A in the figure;

[0018] Figure 4 is a structural schematic view of a mechanical arm welding mechanism in an automatic laser welding device according to an embodiment of the present application;

[0019] Figure 5 is Figure 4 a local enlarged view of B in the figure.

[0020] In the figure:

[0021] 1. Electrical control cabinet; 2. Water chiller; 3. Stabilized power supply; 4. Robotic arm welding mechanism; 401. Base; 402. Robotic arm body; 403. Flange mounting adapter shaft; 404. Laser welding head; 4041. Fiber optic handheld head; 4042. Water inlet; 4043. Water outlet; 405. Camera assembly; 5. Welding fixture; 501. Workbench; 502. Bearing plate; 503. Fixture placement rack; 504. Pneumatic telescopic rotation mechanism; 505. Mounting frame; 506. Electric telescopic rod one; 507. Clamping block; 508. Support frame; 509. Electric telescopic rod two; 510. Clamping plate; 511. Fixing frame; 512. Cylinder; 513. Guide rail; 514. Slide table; 515. Adapter plate; 516. Fixing plate. Detailed Implementation

[0022] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0023] According to an embodiment of the present invention, an automated laser welding device is provided.

[0024] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figures 1-5 As shown, the automated laser welding device according to an embodiment of the present invention includes an electrical control cabinet 1. A water chiller 2 is provided on one side wall of the electrical control cabinet 1, a regulated power supply 3 is provided on one side of the water chiller 2, and a robotic arm welding mechanism 4 is provided on one side of the electrical control cabinet 1. Several welding fixtures 5 are arranged around the robotic arm welding mechanism 4. In addition, in specific applications, at least two sets of welding fixtures 5 are arranged around the robotic arm welding mechanism 4. One set of welding fixtures 5 is arranged on a straight line with the robotic arm welding mechanism 4 and the electrical control cabinet 1, forming a straight line one. The other set of welding fixtures 5 is arranged on another straight line with the robotic arm welding mechanism 4, forming a straight line two. The straight lines one and two are perpendicular to each other. When three sets of welding fixtures 5 are arranged, two sets of welding fixtures 5 are arranged symmetrically with respect to the other set of welding fixtures 5, so that the fixtures remain stable during the welding process.

[0025] It needs to be explained that the electrical control cabinet 1 is provided with a laser, a robot control cabinet and various levels of electrical accessories, and the electrical control cabinet also comprises an MCA15H industrial air conditioner for maintaining a constant temperature and humidity environment inside the cabinet body, an HMI man-machine interface for man-machine dialogue, process parameter setting of laser power and duty cycle, and a JWS101-WCL2-YZ3 computer all-in-one machine for installing laser monitoring software and weld scanning software, for real-time monitoring of laser power output and weld scanning feature point parameter design. The power assembly, laser welding head control board card and other electrical integrated elements are placed, and the laser and robot controller are stored therein.

[0026] The above water cooler 2 can be used for laser and welding head cooling and heat preservation, the water cooler 2 uses a TFLW-3000WDR type water cooler, and adopts a double-temperature regulation function, and is provided with a built-in cooling medium, one low-temperature water channel is connected with the laser to absorb heat generated in the laser beam generation process, and the other high-temperature water channel is connected with the swinging laser welding head to keep the welding head constant temperature, prevent condensation of the internal lens of the welding head and the environment temperature, and balance the excess heat absorbed by the welding head.

[0027] The voltage stabilizing power supply 3 supplies power to the laser and the mechanical arm welding mechanism 4.

[0028] With the above technical scheme of the utility model, the utility model is scientific and novel, the welding device can improve the recognition of position accuracy in the welding process, maintain the stability of the weld, can also be automatically welded according to the edited program, the appearance of the weld is beautiful and uniform, the excess height is low, the efficiency of the subsequent polishing process is improved, in addition, the double-station pneumatic design can save manual feeding and discharging time, simplify manual operation steps and improve laser welding operation efficiency; the robot automation can reduce professional welders and save enterprise operating costs. By setting the station pneumatic design, manual feeding and discharging time is saved, manual operation steps are simplified, and laser welding operation efficiency is improved; production capacity is increased, and the pressure of delivery cycle caused by the shortage of professional welders is relieved; the single product operation time is improved from 240s to 100s; the welder configuration is optimized. The robot automation can reduce professional welders and save enterprise operating costs.

[0029] In one embodiment, for the above-mentioned mechanical arm welding mechanism 4, the mechanical arm welding mechanism 4 comprises a base 401 arranged on one side of the electrical control cabinet 1, the top end of the base 401 is provided with a mechanical arm body 402, the end of the mechanical arm body 402 is provided with a flange mounting adapter shaft 403, one side of the flange mounting adapter shaft 403 is provided with a laser welding head 404, one side of the laser welding head 404 is provided with a camera assembly 405; one end of the laser welding head 404 is provided with a fiber hand-held head 4041, and the outer side of the laser welding head 404 is provided with a water inlet 4042 and a water outlet 4043, so as to realize the welding of the tool, and the welding process can be monitored in real time through the camera assembly 405, and the water inlet 4042 and the water outlet 4043 can form a water cooling structure, which helps to effectively reduce the temperature of the laser welding head in the high-temperature welding process, and avoids damage to the equipment due to overheating.

[0030] Wherein, the base 401 is used for fixedly connecting the robot (mechanical arm body 402) with the ground; the GP25 robot body has an arm span of 1730mm and a load of 25KG; used for carrying the laser welding head 404 and the camera assembly 405; the robot control cabinet is used for robot motion trajectory teaching programming, and the laser and the robot program are freely and flexibly called through I / O instruction and laser unit communication.

[0031] The RFL-C3000S type laser is adopted in the laser welding head 404, which can generate and emit a laser beam with a wavelength of 1064nm; the laser generated by the laser is transmitted to the swing laser welding head through an optical fiber, and then the high-frequency swing of the reflector plate driven by the built-in micro precision motor in the welding head is realized to realize dynamic laser beam welding; the SUP-AMF-P2 wire feeding assembly is also arranged on the laser welding head 404, which is used for the structure of the weld seam requiring filling, and the built-in 0.8mm, 1mm, 1.2mm and 1.6mm pressure roller groove corresponds to the pressure of different specifications of welding wire and pressure roller groove, and then the pressure roller is driven to rotate to send out the welding wire.

[0032] In addition, it needs to be pointed out that one side of the flange mounting adapter shaft 403 is provided with 4 threaded holes and is fixedly connected with the laser welding head 404, and the other side is provided with 9 threaded holes and is fixedly connected with the mechanical arm body 402. The laser welding head is connected with the laser through the QBH socket (fiber hand head 4041) through the optical fiber, and the inside of the welding head circulates cooling water to assist the welding head in cooling. The laser welding head also includes a collimating lens, a protective lens is installed above the collimating lens (there is a drawer window at the welding head to facilitate replacement of the protective lens, the specific structure is: 1, lens drawer; 2, screw locking; wherein the lens drawer contains an upper sealing ring, a protective lens is placed in the middle, and a lower sealing ring is placed), a focusing lens is installed below the collimating lens, and a protective lens socket is arranged below the focusing lens to replace the protective lens daily. The above-mentioned collimating lens and protective lens are shown in the figure, which is prior art, and will not be described in detail here.

[0033] The CCD camera vision system in the camera assembly 405 is connected to the screen through a transmission line to display the weld position in real time, and the CCD camera vision monitoring is used to guide manual observation of the position of the laser beam, and the industrial display screen is configured synchronously to present the position of the laser beam and the molten pool state of the weld surface in the dynamic welding process to the display screen.

[0034] The camera assembly 405 also includes a CXZK-JXB200S model infrared laser emitter and a scanning processor. The infrared laser emitter is used to emit an infrared laser beam to irradiate the weld area, collect weld feature point data, transmit the data to the scanning processor for analysis and solution, calculate the actual position of the weld, and send the position to the robot control cabinet to guide the robot welding posture and coordinate adjustment.

[0035] In addition, the robot angle posture is defined by manual teaching points, and the robot internal control is fitted into a motion line. The meaning of weld monitoring is to observe the display screen after CCD imaging to judge whether the welding position deviates and the flow state of the weld molten pool surface. Whether the process needs to be adjusted is considered. CCD Charge-Coupled Device, a camera that uses a CCD image sensor to perform photoelectric conversion to obtain an image, its working principle mainly involves the following key steps:

[0036] 1. Light focusing;

[0037] Lens: The camera lens is like the lens of the human eye, which collects and focuses the light emitted or reflected by the object being photographed to form a clear optical image on the CCD image sensor. This process follows the principles of geometric optics, and through the combination of multiple lenses inside the lens, the direction of light propagation and the focusing position are adjusted.

[0038] 2. Photoelectric conversion;

[0039] a.CCD image sensor: composed of a large number of closely arranged light-sensitive units (pixels). When light shines on the light-sensitive units of the CCD image sensor, according to the photoelectric effect, photons hit the semiconductor material (such as silicon) in the light-sensitive unit, causing the electrons in the semiconductor to gain enough energy to escape from the atom's binding, generating electron-hole pairs. Among them, the electrons are collected and stored in the corresponding pixel units, while the holes are processed by other mechanisms.

[0040] b. Charge quantity and light intensity relationship: within a certain range, the number of electrons collected by each pixel unit is proportional to the light intensity shining on the pixel. That is, the bright areas of the photographed object correspond to the pixels that produce and accumulate more electrons, while the dark areas correspond to the pixels that accumulate fewer electrons. This converts the optical signal into an electrical signal (change in charge quantity), realizing the first step of photoelectric conversion.

[0041] 3. Signal readout;

[0042] a. Horizontal transfer register and output amplifier: when the charge is transferred to the horizontal transfer register, under the action of the horizontal control signal, the charge is output from the output end of the horizontal transfer register in a serial manner. The output charge signal is amplified by an output amplifier to convert the weak charge signal into a voltage signal with sufficient amplitude for subsequent processing.

[0043] b. A / D conversion: the amplified voltage signal is still an analog signal and needs to be converted to a digital signal by an analog-to-digital converter (A / D converter). The A / D converter discretizes the analog voltage signal into a series of digital values according to a certain quantization accuracy, and these digital values represent the gray scale values of each pixel in the image. The quantized digital signal is stored and transmitted to the display screen in binary data form.

[0044] The working principle of the mechanical arm welding mechanism 4 is as follows: first, the camera assembly 405 acquires the weld area, collects the weld feature point data, and transmits it to the scanning processor for analysis and solution, calculates the actual position of the weld, and then controls the movement of the mechanical arm through the robot control cabinet, so that the laser welding head 404 can be driven to perform laser welding.

[0045] In one embodiment, for the above welding tooling fixture 5, the welding tooling fixture 5 comprises a workbench 501 arranged on one side of the mechanical arm welding mechanism 4, the top end of the workbench 501 is provided with a bearing plate 502, the middle of the top end of the bearing plate 502 is provided with a tool placing rack 503, one end of the tool placing rack 503 is provided with a fixing mechanism one, the middle of one side of the tool placing rack 503 is provided with a fixing mechanism two, both ends of the tool placing rack 503 are provided with pneumatic telescopic rotary mechanisms 504, and in specific applications, the pneumatic telescopic rotary mechanisms 504 are staggered and arranged, and are fixedly connected between the bearing plate 502 through bolts (the pneumatic telescopic rotary mechanism 504 is composed of a telescopic rotary cylinder and a pressing block connected to the piston rod of the cylinder) ; both ends of the top end of the bearing plate 502 and located on one side of the tool placing rack 503 are provided with a fixing mechanism three; the fixing mechanism one comprises a mounting frame 505 arranged at one end of the tool placing rack 503, one side of the top of the mounting frame 505 is provided with an electric telescopic rod one 506, and one end of the piston rod of the electric telescopic rod one 506 is provided with a pressing block 507; the fixing mechanism two comprises a support frame 508 arranged at the middle of one side of the tool placing rack 503, the top of the support frame 508 is provided with an electric telescopic rod two 509, and one end of the piston rod of the electric telescopic rod two 509 is provided with a pressing plate 510; the fixing mechanism three comprises a fixing frame 511 arranged at the top end of the bearing plate 502, one side of the fixing frame 511 is provided with a cylinder 512, the other side of the fixing frame 511 is provided with a guide rail 513, the top end of the guide rail 513 is provided with a sliding table 514, the top end of the sliding table 514 is provided with an adapter plate 515, one side of the adapter plate 515 is provided with a fixed plate 516, so that the tool is fixed in multiple directions, thereby effectively fixing the tool on the fixture, ensuring that the tool does not deform or displace during welding, thereby ensuring the welding quality.

[0046] In addition, it should be noted that the bearing plate 502 and the components arranged on the surface thereof are fixedly connected through bolts.

[0047] The working principle of the welding tooling fixture 5 is as follows: first, the work to be welded is placed on the tool placing rack 503, then the pressing block 507 is driven by the electric telescopic rod one 506 to fix the tool in the X-axis direction, the adapter plate 515 is driven by the cylinder 512 to slide on the sliding table 514, then the fixed plate 516 is driven to fix the tool in the Y-axis direction, the pressing plate 510 is driven by the electric telescopic rod two 509 to fix the tool in the Y-axis direction again, and then the tool is fixed in the Z-axis direction by the rotary pneumatic telescopic rotary mechanism 504.

[0048] In order to facilitate the understanding of the above technical scheme of the utility model, the working principle or operation mode of the utility model in the actual process will be described in detail.

[0049] In practical application, first, open the voltage stabilizing power switch, so that the whole machine device is powered on, then install the tooling on one of the welding tooling fixtures 5, and fix the tooling by the welding tooling fixture 5, and the tooling is welded by the mechanical arm welding mechanism 4, at the same time, the staff installs the tooling on the other welding tooling fixture 5 during the welding process of the mechanical arm welding mechanism 4, realizes double-station welding, and improves the welding efficiency.

[0050] In summary, by means of the above technical scheme of the utility model, the utility model is scientific and novel, the welding device can improve the identification of position accuracy in the welding process, maintain the stability of the weld, can also be automatically welded according to the edited program, the weld appearance is beautiful and uniform, the excess height is low, the subsequent polishing process efficiency is improved, in addition, the double-station pneumatic design can save artificial feeding and discharging time, simplify the artificial operation steps, and improve the laser welding operation efficiency; the robot automation can reduce professional welders and save enterprise operating costs. Through the mechanical arm welding mechanism 4, the welding of the tooling is realized, the welding process can be monitored in real time through the camera assembly 405, and the water inlet 4042 and the water outlet 4043 can form a water cooling structure, which helps to effectively reduce the temperature of the laser welding head in the high-temperature welding process and avoid equipment damage due to overheating. Through the welding tooling fixture 5, the tooling is fixed in multiple directions, so that the tooling is effectively fixed on the fixture, ensuring that the tooling does not deform or displace during welding, thereby ensuring the welding quality.

[0051] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting", "fixing", "screw connection" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited, the above-mentioned terms in the utility model can be understood according to the specific meaning of the above-mentioned terms in the utility model according to the specific situation.

[0052] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An automated laser welding apparatus, characterized by, Including electrical control cabinet (1), one end side wall of the electrical control cabinet (1) is provided with water cooling machine (2), one side of the water cooling machine (2) is provided with voltage stabilizing power supply (3); One side of the electrical control cabinet (1) is provided with mechanical arm welding mechanism (4), a plurality of welding tool clamps (5) are arranged around the mechanical arm welding mechanism (4), so that the tool is kept stable during welding.

2. An automated laser welding apparatus as claimed in claim 1, wherein, The mechanical arm welding mechanism (4) includes a base (401) arranged on one side of the electrical control cabinet (1), a mechanical arm body (402) arranged at the top end of the base (401), a flange mounting adapter shaft (403) arranged at the end of the mechanical arm body (402), a laser welding head (404) arranged on one side of the flange mounting adapter shaft (403), and a camera assembly (405) arranged on one side of the laser welding head (404).

3. An automated laser welding apparatus as defined in claim 2, wherein, One end of the laser welding head (404) is provided with a fiber handheld head (4041), and the outer side of the laser welding head (404) is provided with a water inlet (4042) and a water outlet (4043).

4. The automated laser welding apparatus of claim 1, wherein, The welding tool clamp (5) includes a workbench (501) arranged on one side of the mechanical arm welding mechanism (4), a bearing plate (502) arranged at the top end of the workbench (501), a tool placing rack (503) arranged at the top end of the bearing plate (502), a first fixing mechanism arranged at one end of the tool placing rack (503), a second fixing mechanism arranged at the middle of one side of the tool placing rack (503), and a pneumatic telescopic rotating mechanism (504) arranged at both ends of the tool placing rack (503). Both ends of the top end of the bearing plate (502) and located on one side of the tool placing rack (503) are provided with a third fixing mechanism.

5. An automated laser welding apparatus as defined in claim 4, wherein, The first fixing mechanism includes a mounting bracket (505) arranged at one end of the tool placing rack (503), an electric telescopic rod one (506) arranged at the top of one side of the mounting bracket (505), and a pressing block (507) arranged at one end of the piston rod of the electric telescopic rod one (506).

6. An automated laser welding apparatus as defined in claim 5, wherein, The second fixing mechanism includes a support bracket (508) arranged at the middle of one side of the tool placing rack (503), an electric telescopic rod two (509) arranged at the top end of the support bracket (508), and a pressing plate (510) arranged at one end of the piston rod of the electric telescopic rod two (509).

7. An automated laser welding apparatus as defined in claim 5, wherein, The third fixing mechanism includes a fixing bracket (511) arranged at the top end of the bearing plate (502), an air cylinder (512) arranged on one side of the fixing bracket (511), a guide rail (513) arranged at the bottom of the other side of the fixing bracket (511), a sliding table (514) arranged at the top end of the guide rail (513), an adapter plate (515) arranged at the top end of the sliding table (514), and a fixing plate (516) arranged on one side of the adapter plate (515).

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