A multifunctional welding gun with variable welding spot and a method for controlling the spot

Abstract

The present invention relates to a multifunctional welding gun with variable welding surface light spot and a light spot control method thereof. The welding gun comprises a welding gun body, and the welding gun body comprises a gun head, a handheld part and a connecting part; an optical path channel is arranged in the welding gun body, an XY axis deflection mechanism for adjusting the exit deflection angle of an incident light beam is arranged in the connecting part, a cooling channel and a display screen for conveniently observing welding parameters are arranged on the connecting part, a parameter adjuster for adjusting welding parameters is arranged on the handheld part, the gun head comprises a gun head body and a base, an electrostatic shielding layer is arranged between the gun head body and the base, an air blowing hole is arranged on the base, an air blowing goggles and a goggles drawer for preventing airflow backflow are also arranged on the base, and a wiring channel is also arranged in the handheld part; the overall structure of the present invention is compact, and it is convenient and simple to use, and it can realize arbitrary switching of point, line and surface processing modes, and it can also cool the welding gun body, thereby extending the service life, and at the same time, it can also avoid the influence of static electricity on internal components.

Description

Technical Field

[0001] The invention relates to the technical field of laser welding, and in particular to a multifunctional welding gun with variable welding surface light spot and a light spot control method thereof. Background Art

[0002] With the development of manufacturing industry, ordinary welding machines can no longer meet the needs of production and processing. The application direction of welding technology is constantly expanding and innovating, thus giving birth to laser welding machines. Laser welding machines, also commonly known as laser welding machines, are machines used for laser material processing. Laser welding technology has been increasingly widely used due to its advantages of high efficiency and superior performance. Among them, small laser welding machines are more and more accepted by users because of their flexible and convenient use. According to their working mode, they are divided into laser mold welding machines, automatic laser welding machines, laser spot welding machines, and optical fiber transmission laser welding machines.

[0003] Laser welding uses high-energy laser pulses to locally heat the material in a tiny area. The energy of the laser radiation diffuses into the interior of the material through heat conduction, melting the material to form a specific molten pool to achieve the purpose of welding. In the welding production process, three types of welding surface processes are often involved: point, line, and surface. Most of the current laser welding devices use different types of welding equipment for different types of welding patterns. Not only is the welding efficiency low and the equipment cost high, but the independent welding equipment has a single function and cannot meet the complex and changeable application environment. The technology is relatively backward and cannot meet market needs. Summary of the invention

[0004] The purpose of the present invention is to provide a multifunctional welding gun with a variable welding surface light spot and a light spot control method thereof in view of the deficiencies in the prior art. The multifunctional welding gun with a variable welding surface light spot and a light spot control method thereof can well solve the above-mentioned problems.

[0005] In order to achieve the above requirements, the technical solution adopted by the present invention to solve its technical problems is:

[0006] Provided are a multifunctional welding gun with variable welding surface spot and a spot control method thereof, comprising a welding gun body, the welding gun body comprising a gun head and a handheld part and a connecting part connecting the handheld part and the gun head; the welding gun body is provided with an optical path channel extending from the handheld part to the gun head, the optical path channel in the connecting part is provided with an XY axis deflection mechanism for adjusting the exit deflection angle of an incident light beam, the connecting part is provided with a cooling channel and a display screen for conveniently observing welding parameters, the handheld part is provided with a parameter adjuster for adjusting welding parameters, the gun head comprises a gun head body and a base connecting it to the connecting part, an electrostatic shielding layer is provided between the gun head body and the base, the base is provided with an air blowing hole connected to the gun head body, the base is also provided with an air blowing goggles for preventing airflow backflow and a goggles drawer for conveniently removing the air blowing goggles, and the handheld part is also provided with a wiring channel passing through both ends thereof.

[0007] The multifunctional welding gun with variable welding surface spot and the method for controlling the welding spot thereof described in the present invention, wherein the XY-axis deflection mechanism includes an X-axis deflection reflector, a Y-axis deflection reflector, and an X-axis motor and a Y-axis motor for respectively driving the X-axis deflection reflector and the Y-axis deflection reflector to deflect.

[0008] The multifunctional welding gun with variable welding surface spot and the method for controlling the spot thereof described in the present invention are characterized in that an adjustment cavity is provided on the optical path channel located inside the connecting part, the XY axis deflection mechanism is arranged in the adjustment cavity, and two fixed reflectors are respectively provided at the two ends of the optical path channel inside the connecting part corresponding to the internal part thereof for cooperating with the deflection mechanism to reflect the light beam.

[0009] The multifunctional welding gun with variable welding surface spot and the method for controlling the spot thereof described in the present invention, wherein the base is provided with a cooling reflux channel, and the cooling reflux channel and the cooling channel together form a circulation channel for the circulation of the cooling medium.

[0010] The multifunctional welding gun with variable welding surface spot and the method for controlling the welding spot thereof described in the present invention, wherein the cooling channel comprises an inlet channel and an outflow channel respectively connected to the two ends of the cooling reflux channel, the inlet channel and the outflow channel respectively form the inlet and outlet of the circulation channel, and the inlet and the outlet are connected to the wiring channel.

[0011] The multifunctional welding gun with variable welding surface light spot and the light spot control method thereof described in the present invention are characterized in that the angle between the hand-held part and the gun head is an obtuse angle, the display screen is located on a side of the connecting part away from the gun head, and the connecting part is also provided with a protective cover for providing electrostatic shielding for the display screen.

[0012] The multifunctional welding gun with variable welding surface spot and the method for controlling the spot thereof described in the present invention are as follows: wherein the air hole is located on a side wall of the base facing the handheld portion, an air passage connected to the wiring channel is penetrated through the connecting portion corresponding to the air hole, and a conducting member connecting the air passage with the air hole is provided on the base.

[0013] The multifunctional welding gun with variable welding surface spot and the method for controlling the spot thereof described in the present invention are characterized in that the gun head body is also provided with a welding wire correction pipe to prevent the welding wire from skewing, the base is also provided with a wiring hole adjacent to the air hole, the connecting part is provided with a wiring channel adjacent to the air channel, and the conducting part is provided with an air guide duct and a wiring groove.

[0014] The multifunctional welding gun with variable welding surface spot and the method for controlling the spot thereof described in the present invention, wherein the parameter adjuster includes a housing, a circuit board arranged in the housing, and a knob-type coding switch arranged corresponding to the circuit board.

[0015] A method for controlling the light spot of a multifunctional welding gun with a variable welding surface light spot is also provided, the method comprising the following steps:

[0016] Step 1: setting an initial X-axis deflection value and an initial Y-axis deflection value through the system according to the initial length and width of the welding surface, and the system displays the initial X-axis deflection value and the initial Y-axis deflection value through the display screen;

[0017] Step 2: The XY axis deflection mechanism receives a first instruction from the system and outputs an initial X axis deflection amount and an initial Y axis deflection amount corresponding to the initial X axis deflection value and the initial Y axis deflection value according to the first instruction;

[0018] Step 3: The system obtains the output data of the parameter adjuster and converts it into the real-time value of X-axis deflection and the real-time value of Y-axis deflection, and the XY-axis deflection mechanism receives the second instruction of the system and outputs the real-time amount of X-axis deflection and the real-time amount of Y-axis deflection corresponding to the real-time value of X-axis deflection and the real-time value of Y-axis deflection according to the second instruction;

[0019] Step 4: The system updates the display value of the display screen.

[0020] The beneficial effects of the present invention are: the overall structure is compact, the functions are powerful, the adaptability to the working environment is strong, the use is convenient and simple, and continuous production and processing can be realized. There is no need for the operator to move back and forth between the welding station and the control console when switching between two adjacent processes. The three different processing modes of points, lines and surfaces of the welding surface can be switched arbitrarily. The welding gun body can also be cooled to avoid the internal components being affected by high temperature for a long time, which can extend the service life of the welding gun. At the same time, the influence of static electricity on the internal components can be avoided, further improving and ensuring the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work:

[0022] Figure 1 It is a schematic diagram of the overall structure of a multifunctional welding gun with a variable welding surface light spot according to the present invention.

[0023] Figure 2 The exploded top view of the multifunctional welding gun with variable welding surface light spot of the present invention.

[0024] Figure 3 It is a structural diagram of the conducting part of the multifunctional welding gun with variable welding surface light spot of the present invention.

[0025] Figure 4 The exploded bottom view of the multifunctional welding gun with variable welding surface light spot of the present invention.

[0026] Figure 5 It is a structural diagram of the connection part of a multifunctional welding gun with variable welding surface light spot according to the present invention.

[0027] Figure 6 The exploded front view of the multifunctional welding gun with variable welding surface light spot of the present invention.

[0028] Figure 7 The present invention is a flow chart of a method for controlling a multifunctional welding gun with a variable welding surface spot. DETAILED DESCRIPTION

[0029] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the present invention and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0030] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0031] "Multiple" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0032] Moreover, the terms "up, down, left, right, upper end, lower end, longitudinal" and the like indicating directions are all based on the posture and position of the device or equipment described in this solution during normal use.

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be described clearly and completely in combination with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0034] The preferred embodiment of the present invention is a multifunctional welding gun with variable welding surface spot, such as Figure 1-6As shown, the welding gun body includes a welding gun body, which includes a gun head 1 and a hand-held part 2 and a connecting part 3 connecting the hand-held part 2 and the gun head 1, and all three are detachably connected by screws; the welding gun body is provided with an optical path channel 100 extending from the hand-held part 2 to the gun head 1. In practice, the laser optical cable is inserted into the hand-held part 2 and aligned with the optical path channel, and an XY-axis deflection mechanism 4 for adjusting the outgoing deflection angle of the incident light beam is provided on the optical path channel in the connecting part 3, so as to realize the two-dimensional movement of the light beam on the welding surface, and cope with different types of spot welding of points, lines and surfaces; further, a cooling channel 14 and a display screen 5 for observing welding parameters are provided on the connecting part 3. In order to take away the heat generated by the laser beam, the life of the internal lens group and other components will not be shortened due to being in a high temperature environment for a long time. The display screen 5 can facilitate the operator to compare the actual welding effect according to the welding parameters to avoid the occurrence of parameter jitter causing welding to fail to meet the standards. The handheld part 2 is provided with a parameter adjuster 6 for adjusting the welding parameters, which can facilitate the operator to adjust the matching parameter values ​​according to different real-time welding conditions. The general parameter values ​​are the power of the laser, the amplitude, speed and yaw mode of the motor swing, and the wire feeding speed when matching a specific welding machine. Further, the gun head 1 includes a gun head body 101 and its A base 102 is connected to the connecting portion 3, and an electrostatic shielding layer 7 is provided between the gun head body 101 and the base 102. Specifically, since the gun head body 101 is a consumable part, it generally includes a gun nozzle 1a, a gun barrel 1b, a fixed sleeve 1c sleeved on the gun barrel 1b, and a tube seat 1d for fixing the gun barrel 1b and the fixed sleeve 1c on the base 102. The electrostatic shielding layer 7 is a bakelite board to prevent the static electricity on the gun head body 101 from affecting the display screen 5 and the parameter adjuster 6 and other electronic devices. Furthermore, the base 102 is provided with a blowing hole 8 connected to the gun head body 101, so as to pass an inert protective gas from the gun head body 10 The outlet of 1 is coaxially emitted with the laser beam to protect the welding surface and prevent oxidation of the weldment resulting in a decrease in welding quality. In addition, the base 102 is also provided with a blowing goggles 9 to prevent airflow backflow and a goggles drawer 10 for conveniently removing the blowing goggles 9. The blowing goggles 9 can prevent the inert protective gas from backflowing into the connecting portion 3 and the handheld portion 2, and the goggles drawer 10 can conveniently remove the blowing goggles 9 for cleaning, thereby ensuring the transparency of the laser beam and avoiding excessive local temperature rise. The handheld portion 2 is also provided with a wiring channel 11 running through both ends thereof, which can realize the internal routing of the air pipe of the blowing hole and the connecting line of the display screen 5, thereby ensuring the neat appearance of the welding gun body.

[0035] The overall structure of the present invention is compact, the functions are powerful, the adaptability to the working environment is strong, the use is convenient and simple, and continuous production and processing can be realized. There is no need for the operator to move back and forth between the welding station and the control main console when switching between two adjacent processes. The three different processing modes of points, lines and surfaces of the welding surface can be switched arbitrarily. The welding gun body can also be cooled to avoid the long-term influence of high temperature on the internal components, which can extend the service life of the welding gun. At the same time, the influence of static electricity on the internal components can be avoided, and the welding quality can be further improved and guaranteed. It can take into account the optimization and trade-offs of production efficiency, environmental adaptability and equipment cost, etc., which greatly promotes the technological progress of domestic handheld laser welding equipment.

[0036] Preferably, the XY-axis deflection mechanism 4 includes an X-axis deflection mirror 41, a Y-axis deflection mirror 42, and an X-axis motor 43 and a Y-axis motor 44 for respectively driving the X-axis deflection mirror 41 and the Y-axis deflection mirror 42 to deflect, wherein the X-axis motor 43 and the Y-axis motor 44 are embedded in the connecting portion 3, and the point, line and surface welding spot switching can be realized through various action combinations of the X-axis deflection mirror 41 and the Y-axis deflection mirror 42. When the X-axis deflection mirror 41 and the Y-axis deflection mirror 42 are both fixed, the light spot corresponding to the origin is realized, and when either of them deflects, linear light spot welding is realized, and when both of them deflect, surface light spot welding is realized, and the adaptability is extremely strong.

[0037] Preferably, an adjustment cavity 12 is provided on the optical path channel located inside the connecting part 3, and the XY-axis deflection mechanism 4 is provided in the adjustment cavity 12. The setting of the adjustment cavity 12 can provide sufficient activity space for the deflection of the X-axis deflection reflector 41 and the Y-axis deflection reflector 42. Two fixed reflectors 13 that cooperate with the deflection mechanism to reflect the light beam are respectively provided at the two ends of the optical path channel inside the connecting part 3, so as to adjust the incident angle and the emission angle of the light beam, so as to facilitate the optimization design of the overall shape of the welding gun body.

[0038] Preferably, a cooling reflux channel 15 is provided on the base 102, and the cooling reflux channel 15 and the cooling channel 14 together form a circulation channel for the circulation of the cooling medium, so as to achieve overall cooling of the welding gun body, avoid local excessive temperature, and ensure that the internal devices are at a suitable working temperature.

[0039] Preferably, the cooling channel 14 includes an inlet channel 141 and an outflow channel 142 respectively connected to the two ends of the cooling return channel 15, the inlet channel 141 and the outflow channel 142 respectively form an inlet 16 and an outlet 17 of the circulation channel, the inlet 16 and the outlet 17 are connected to the wiring channel 11, and water pipe joints 18 are provided in the inlet 16 and the outlet 17 to facilitate connection and assembly.

[0040] In order to facilitate the assembly and fixation of the reflector 13, a window and a sealing plate 29 for sealing the window are provided on the base 3 corresponding to the adjustment cavity 12. Specifically, two windows are provided and penetrate the adjustment cavity 12 on the left and right. In addition, the cooling channel 14 is provided at the edge of the window so as to be sealed by the sealing plate 29 and disassembled and maintained later.

[0041] Preferably, the angle between the hand-held portion 2 and the gun head 1 is an obtuse angle to facilitate hand-held welding and improve the compatibility with human hands. The display screen 5 is located on the side of the connecting portion 3 away from the gun head 1 for easy observation. The connecting portion 3 is also provided with a protective cover 26 that provides electrostatic shielding for the display screen 5 to avoid being affected by static electricity.

[0042] Preferably, the air hole 8 is located on a side wall of the base 102 facing the hand-held part 2, that is, located at the lower end of the gun head 1, and an air passage 19 connected to the wiring channel 11 is penetrated through the connecting part 3 corresponding to the air hole 8, and a conducting member 20 is provided on the base 102 to connect the air passage 19 with the air hole 8. Specifically, the conducting member 20 can be a conduit or a block structure with a through hole. The present scheme preferably adopts a block structure, and one end thereof is detachably connected to the connecting part 3, and the other end is detachably connected to the base 102. Compared with the use of a conduit, the compactness of the welding gun can be improved, and at the same time, it can prevent scratches and bumps, which is more conducive to the promotion of the product.

[0043] Preferably, the gun head body 101 is also provided with a welding wire correction pipe 21 to prevent the welding wire from skewing. Specifically, the welding wire correction pipe 21 is longitudinally hinged at the lower end of the gun head body 101 through a bracket 27, which plays a role in wire feeding and does not block the operator's line of sight of observing the welding situation. The design is reasonable. Furthermore, the base 102 is also provided with a wiring hole 22 adjacent to the air hole 8, the connecting part 3 is provided with a wiring channel 23 adjacent to the air channel 19, and the conductive part 20 is provided with an air guide 24 and a wiring groove 25. The adjacent arrangement method can further enhance the integrity, and can play a positive role in cost control or assembly convenience. At the same time, the gun head is connected to the welding material through the crocodile safety clip line. During welding, when the safety clip clamps the welding material and the copper mouth part of the gun head contacts the welding material and forms a closed loop, it constitutes the necessary condition for light emission, thereby improving the safety of welding.

[0044] Preferably, the parameter adjuster 6 includes a housing 61, a circuit board (not shown) arranged in the housing, and a knob-type dip switch 62 arranged corresponding to the circuit board. In practice, the control chip model of the circuit board specifically adopts ST (STMicroelectronics) STM32F030K6T6. The knob-type dip switch 62 can facilitate the operator to adjust the parameters, which is more convenient and quicker than button-type control.

[0045] The spot control method of the multifunctional welding gun with variable welding spot of the preferred embodiment of the present invention is as follows: Figure 7 As shown, the method comprises the following steps:

[0046] Step 1 S10: The operator sets the initial X-axis deflection value and the initial Y-axis deflection value through the system according to the initial length and width of the welding surface, and the system displays the initial X-axis deflection value and the initial Y-axis deflection value through the display screen 5, wherein the system is the background console, and the system is the Qilin double pendulum welding control system (BWT15 double pendulum handheld welding control system v1 / 2.0 or BWT16-Plus Qilin double pendulum handheld laser welding control system v1 / 2.0);

[0047] Step 2 S20: The XY axis deflection mechanism 4 receives the first instruction of the system and outputs the initial X axis deflection amount and the initial Y axis deflection amount corresponding to the initial X axis deflection value and the initial Y axis deflection value according to the first instruction;

[0048] Step 3 S30: the system obtains the output data of the parameter adjuster 6 and converts it into the real-time value of the X-axis deflection and the real-time value of the Y-axis deflection, and the XY-axis deflection mechanism 4 receives the second instruction of the system and outputs the real-time amount of the X-axis deflection and the real-time amount of the Y-axis deflection corresponding to the real-time value of the X-axis deflection and the real-time value of the Y-axis deflection according to the second instruction;

[0049] Step 4 S40: the system updates the display value of the display screen 5.

[0050] It should be noted that the display screen 5, the parameter adjuster 6 and the XY axis yaw mechanism 4 are all connected to the system communication.

[0051] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A multifunctional welding gun with variable welding spot, characterized in that: It comprises a welding gun body, the welding gun body comprises a gun head and a hand-held part and a connecting part connecting the hand-held part and the gun head; the welding gun body is provided with an optical path channel running from the hand-held part to the gun head, the optical path channel in the connecting part is provided with an XY axis deflection mechanism for adjusting the exit deflection angle of the incident light beam, the connecting part is provided with a cooling channel and a display screen for conveniently observing welding parameters, the hand-held part is provided with a parameter adjuster for adjusting welding parameters, the gun head comprises a gun head body and a base connecting it to the connecting part, an electrostatic shielding layer is provided between the gun head body and the base, an air blowing hole communicating with the gun head body is provided on the base, an air blowing goggles for preventing airflow backflow and a goggles drawer for conveniently removing the air blowing goggles are also provided on the base, and a wiring channel running through both ends of the hand-held part is also provided in the hand-held part; The angle between the handheld part and the gun head is an obtuse angle, the display screen is located on the side of the connecting part away from the gun head, and the connecting part is also provided with a protective cover for providing electrostatic shielding for the display screen; the air blowing hole is located on a side wall of the base facing the handheld part, an air passage connected to the cable channel is penetrated on the connecting part corresponding to the air blowing hole, and a conducting member for connecting the air passage with the air blowing hole is provided on the base; One end of the conductive member is detachably connected to the connecting portion, and the other end is detachably connected to the base. An air guide channel and a wiring groove are provided on the conductive member.

2. The multifunctional welding gun with variable welding spot according to claim 1, characterized in that: The XY axis deflection mechanism includes an X axis deflection reflector, a Y axis deflection reflector, and an X axis motor and a Y axis motor for driving the X axis deflection reflector and the Y axis deflection reflector to deflect respectively.

3. The multifunctional welding gun with variable welding spot according to claim 2, characterized in that: An adjustment cavity is provided on the optical path channel inside the connecting part, the XY axis deflection mechanism is arranged in the adjustment cavity, and two fixed reflectors are respectively provided at the two ends of the optical path channel inside the connecting part to cooperate with the deflection mechanism to reflect the light beam.

4. The multifunctional welding gun with variable welding spot according to claim 1, characterized in that: The base is provided with a cooling reflux channel, and the cooling reflux channel and the cooling channel together form a circulation channel for the circulation of cooling medium.

5. The multifunctional welding gun with variable welding spot according to claim 4 is characterized in that: The cooling channel includes an inlet channel and an outlet channel respectively communicating with both ends of the cooling return channel, the inlet channel and the outlet channel respectively forming an inlet and an outlet of the circulation channel, and the inlet and the outlet are communicated with the wiring channel.

6. The multifunctional welding gun with variable welding spot according to claim 1, characterized in that: The gun head body is also provided with a welding wire correction pipe to prevent the welding wire from skewing, the base is also provided with a wiring hole adjacent to the blowing hole, the connecting part is provided with a wiring channel adjacent to the air channel, and the conductive part is provided with an air guide and a wiring groove.

7. The multifunctional welding gun with variable welding spot according to claim 1, characterized in that: The parameter adjuster includes a shell, a circuit board arranged in the shell, and a knob-type coding switch arranged corresponding to the circuit board.

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