Laser welding machine integrated with wire feeding mechanism

Abstract

A laser welding machine integrated with a wire feeding mechanism. The problem that existing handheld laser welding machines on the market only serve as light source devices, and a wire feeding machine needs to be additionally provided thereon to deliver welding wires is solved, and good heat dissipation is achieved.

Description

Laser welding machine with integrated wire feeding mechanism Technical Field

[0001] The invention relates to a laser welding machine, in particular to a laser welding machine with a wire feeding mechanism based on phase change heat dissipation. Background Art

[0002] In recent years, handheld laser welding, as an emerging laser welding technology, has become increasingly popular across various industries. Currently, handheld laser welding machines primarily use air cooling and water cooling. Water cooling involves routing piping within the laser to create a circulating water channel, allowing cold water to flow in and hot water to flow out, thereby cooling the laser. Water-cooled handheld laser welding machines are large and heavy, subject to significant space and equipment constraints during use. Air cooling utilizes phase change cooling technology, simultaneously exchanging heat with cold while using a fan to dissipate heat from the laser. Compared to water-cooled lasers of the same power, air-cooled lasers are smaller and easier to transport, a trend that is expected to continue in the industry. Currently, handheld laser welding machines on the market function solely as a light source. For welding operations, they require a separate wire feeder to deliver the wire. This is costly, cumbersome to transport and maintain, and requires complex synchronization between the two. The present invention uses air-cooling heat dissipation technology and combines the idea of ​​integrated structural design to cleverly combine the wire feeding mechanism with the air-cooled handheld laser welding machine, and designs an air-cooled handheld laser welding machine with integrated wire feeding function, making the welding equipment structure more compact and lightweight, and more convenient to use and transport. Summary of the Invention

[0003] The present invention aims to provide a laser welding machine with an integrated wire feeder. Currently, handheld laser welding machines on the market serve only as a light source, requiring a separate wire feeder to transport the welding wire during welding operations. To address this issue, the present invention provides a laser welding machine with an integrated wire feeder.

[0004] A laser welding machine with an integrated wire feeding mechanism comprises a welding machine housing, a phase change heat sink, a semiconductor pump module, an optical cavity device, a mounting bracket, a wire feeding mechanism, a fan, and a handheld welding gun; the phase change heat sink comprises a plate-shaped base portion located at the bottom, the base portion comprises a cavity for accommodating a phase change material, the cavity being filled with the phase change material, and the phase change heat sink further comprises a hollow portion located at the top; the semiconductor pump module is fixed to the bottom of the phase change heat sink, which is fixed to the lower surface of the base portion; the mounting bracket is fixed to the upper surface of the base portion; the wire feeding mechanism is fixed to the upper portion of the phase change heat sink via the mounting bracket; and the fan is used to accelerate the airflow passing through the hollow portion.

[0005] Preferably, the hollow portion is designed as a hollow grille, the hollow portion is fixed on the upper side of the base portion, the hollow portion forms a plurality of ventilation holes extending along the first direction, the fan is fixed on the rear side of the hollow portion, the base portion is divided into a front area and a rear area, and the hollow portion is located on the upper side of the rear area of ​​the base portion.

[0006] Preferably, the hollow portion includes a hollow portion frame, and the hollow portion frame preferably includes a vertical support portion and a horizontal support portion, and the vertical support portion and the horizontal support portion are interconnected to form a frame; a frame heat dissipation channel for accommodating a phase change heat dissipation material is provided in the frame, and the phase change heat dissipation material is injected into the frame heat dissipation channel, a vertical heat dissipation channel is provided in the vertical support portion of the frame, and a horizontal heat dissipation channel is provided in the horizontal support portion of the frame, the vertical heat dissipation channel and the horizontal heat dissipation channel are connected, and the phase change material can flow freely and exchange between the horizontal heat dissipation channel and the vertical heat dissipation channel.

[0007] Preferably, the accommodating cavity for accommodating the phase change heat dissipation material in the base portion is connected to the frame heat dissipation channel in the hollow portion to form an L-shaped phase change heat dissipation channel; the phase change heat dissipation material can be evaporated in the accommodating cavity in the base portion, then rise and transfer to the frame heat dissipation channel in the hollow portion, be cooled in the frame heat dissipation channel in the hollow portion, and then the liquefied phase change material flows downward back into the accommodating cavity in the base portion.

[0008] Preferably, on the upper surface of the base, the mounting bracket is located on the front side of the hollow part, and the welding wire wheel is fixed to the side of the mounting bracket through the damping disk shaft; the welding machine housing includes a laser welding machine shell, a front panel, and a rear panel; the fan extracts heat from the inside of the laser welding machine through the gas flow channel, and the air is blown into the multiple ventilation holes of the hollow part, and then flows out of the laser welding machine; when the wire feeding motor is running, the welding wire on the welding wire wheel can be smoothly fed out. When a new welding wire needs to be replaced, the damping disk shaft end cover is removed to remove the welding wire.

[0009] Preferably, the welding machine housing includes a bottom shell, and the first shell of the laser welding machine also includes a movable door panel, which is fixed to the laser welding machine housing through a hinge. When a new welding wire needs to be replaced, the movable door panel is opened, and the damping disk shaft end cover is removed to remove the welding wire wheel. The welding wire wheel is fixed to the right side of the mounting bracket through the damping disk shaft, the power supply and control board are fixed to the left side of the mounting bracket, and the mounting bracket and the wire feeding motor are fixed to the upper part of the base of the phase change radiator.

[0010] Preferably, a handheld welding gun is further included, which is fixed to the front panel of the laser welding machine through a flexible sleeve. The wire feeding motor and the laser welding machine light source system, under the coordination of the control panel, respectively feed the welding wire on the wire wheel and the laser to the predetermined position of the end of the handheld welding gun through the flexible sleeve.

[0011] Preferably, the semiconductor pump module is fixed on the lower surface of the base portion, and the heat generated by it is conducted into the base portion on the upper side thereof, and the heat is diffused to other positions of the base portion / the part of the base portion located below the hollow portion through the phase change heat dissipation material of the base portion, and then the heat is transferred to the hollow portion on the upper side of the base portion. The air passes through the hollow gaps of the radiator fins, and then the heat of the hollow portion is taken away by the airflow.

[0012] Preferably, the base part is divided into a front area and a rear area, the cavities for accommodating phase change materials in the base part are distributed in the front area and the rear area, the fan is fixed on the rear side of the hollow part, and the hollow part is located on the upper side of the rear area of ​​the base part; the height of the bottom of the accommodating cavity in the base part is not consistent in the entire area, and the bottom of the accommodating cavity in the base part extends obliquely downward from the rear area to the front side.

[0013] Preferably, the phase change material is a vapor-liquid phase change material, and also includes a wire feeding motor. The wire feeding motor is located on the upper side of the front area of ​​the base part. The heat generated by the wire feeding motor can be conducted to the base part on its lower side. The phase change heat dissipation material in the base part diffuses the heat generated by the wire feeding motor to the lower side of the hollow part, and then transfers the heat to the hollow part, and then takes the heat of the hollow part away through the airflow. The wire feeding mechanism and the wire feeding motor are both located on the right side of the mounting bracket.

[0014] The present invention provides the following beneficial effects: It relates to the field of handheld laser welding technology, specifically an air-cooled handheld laser welding machine with integrated wire feeding. The air-cooled handheld laser welding machine comprises a laser light source control system, a wire feeding mechanism, and a welding mechanism. The laser light source control system primarily comprises a semiconductor pump module, an optical cavity device, a phase change heat sink, a blower, a touch screen display, a power supply, a control panel, and a mounting bracket. The wire feeding mechanism comprises a damping disk shaft, a wire wheel, and a wire feeding motor. The welding mechanism comprises a handheld welding gun and corresponding sleeve assembly. The semiconductor pump module and optical cavity device are fixed to the bottom of the phase change heat sink, the blower is fixed to the side of the phase change heat sink, the mounting bracket is fixed to the top of the phase change heat sink, the wire wheel is fixed to the right side of the mounting bracket via a damping disk shaft, and the power supply and control panel are fixed to the left side of the mounting bracket. When the laser welding machine is operating, heat generated by the semiconductor pump module and optical cavity is transferred upward from the bottom of the phase change heat sink. The blower then extracts the heat from the interior of the laser welding machine through a gas flow channel, thereby reducing the internal temperature of the laser welding machine. At the same time, the present invention uses air-cooling heat dissipation technology to design an air-cooled handheld laser welding machine. The idea of ​​integrated structural design is adopted to cleverly combine the wire feeding mechanism with the air-cooled handheld laser welding machine, making the welding equipment structure more compact, lightweight, and more convenient to use and transport. The welding equipment structure is made more compact, lightweight, and more convenient to use and transport. The wire feeding mechanism and the handheld laser welding machine are combined into one, saving manufacturing and maintenance costs. Using phase change heat dissipation technology, a highly integrated air-cooled handheld laser welding machine is designed; the semiconductor pump module is fixed to the bottom of the phase change radiator, the fan is fixed to the side of the phase change radiator, and the wire feeding mechanism is fixed to the upper part of the phase change radiator through a mounting bracket. The layout is clever and innovative; the phase change radiator is small in size and light in weight, has good heat dissipation performance, and the "L"-shaped design is unique and has strong market promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG1 is a schematic diagram of the three-dimensional structure of an air-cooled handheld laser welding machine proposed by the present invention;

[0016] FIG2 is a schematic diagram of the wire feeding structure of the laser welding machine proposed in the present invention with a portion of the housing hidden;

[0017] FIG3 is a schematic diagram of the control system layout of the laser welding machine proposed in the present invention behind a hidden portion of the housing;

[0018] FIG4 is a schematic diagram of the air cooling and heat dissipation system of the laser welding machine proposed by the present invention.

[0019] FIG. 5 is a schematic diagram of a preferred embodiment of a mounting bracket of the present invention.

[0020] In the figure: 1. Handheld welding gun; 2. Hinge; 3. Movable door panel; 4. Front panel; 5. Touch screen; 6. Housing; 7. Fan; 8. Phase change radiator; 9. Bottom shell; 10. Damping disk shaft; 11. Wire wheel; 12. Mounting bracket; 13. Wire feed motor; 14. Drive power supply; 15. Control panel; 16. Semiconductor pump module; 17. Rear panel; 18. Fan protection cover. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. It should be noted that when an element is described as "fixed on" / "fixed on" / "installed on" another element, it can be directly on the other element, or there can be one or more centered elements between them. When an element is described as "connected" to another element, it can be directly connected to the other element, or there can be one or more centered elements between them. The terms "upper", "lower", "left", "right", "inside", "outside" and similar expressions used in this specification are for illustrative purposes only. In this specification, the "installation" includes welding, screwing, clamping, bonding, etc. to fix or restrict a certain element or device to a specific position or place.

[0022] As shown in Figure 1, the laser welding machine of the present invention is an air-cooled handheld laser welding machine with an integrated wire feeding function, including a welding machine housing. The welding machine housing includes a bottom shell 9 and an upper shell. The upper shell preferably includes a laser welding machine housing 6, a front panel 4, and a rear panel 17. In addition, for easy maintenance, the welding machine housing also includes a movable door panel 3. As can be seen from Figure 1, the laser welding machine first housing 6 also includes an upper shell, which is provided with a handle.

[0023] The air-cooled handheld laser welding machine with integrated wire feeding function also includes a handheld welding gun 1, which is fixed to the front panel 4 of the laser welding machine through a flexible sleeve. The wire feeding motor 13 and the laser welding machine light source system, under the coordinated action of the control board 15, respectively send the welding wire on the wire wheel 11 and the laser light source to the correct predetermined position at the end of the handheld welding gun 1 through the flexible sleeve, thereby realizing the welding operation. Preferably, the control board can simultaneously coordinate and control the light source system and the wire feeding motor of the laser welding machine to achieve matching of the working state of the wire feeding motor with the working state of the laser welding machine light source system. That is, the working state of the wire feeding motor for wire feeding can be matched with the state of laser light welding through short-distance communication control of a control module (control board) of the welding machine, thereby solving the problem that the conventional welding machine and the wire feeding machine cannot have good wire feeding matching, signal anti-interference or external matching requires additional detection devices and matching software.

[0024] As shown in FIG4 , the present invention relates to a laser welding machine based on phase change heat dissipation, comprising a phase change heat sink 8 , which comprises a base portion having a plate-like structure at a lower portion, the base portion preferably comprising an internal cavity containing a phase change material, and a hollow portion at an upper portion, the hollow portion being designed as a hollow grille, the hollow grille preferably comprising a plurality of plate-like structures forming heat dissipation fins, with heat dissipation and ventilation channels formed between the plurality of plate-like structures. The hollow portion is fixed to the upper side of the base portion, and the hollow portion forms a plurality of ventilation holes extending along a first direction (the first direction may also be defined as a front-to-back direction), and a fan is fixed to the rear side of the hollow portion; the base portion may be divided into a front region and a rear region (the boundary between the front region and the rear region may be defined as a line bisecting the base portion perpendicular to the first direction, or may be defined as a reasonable boundary between the front region and the rear region according to the area ratio of the front region and the rear region as required), and the hollow portion is located on the upper side of the rear region of the base portion. The hollow portion may be a plurality of heat dissipation fins arranged on a frame, or the hollow portion may be a plurality of heat dissipation plates connected to each other to form a frame-type heat dissipation structure.

[0025] The semiconductor pump module 16 is fixed to the bottom of the phase-change heat sink 8 and is mounted on the lower surface of the base. The wire feed motor 13 and the mounting bracket 12 are fixed to the upper portion of the base of the phase-change heat sink 8. As can be seen from Figure 2, the wire feed motor 13 is mounted on the upper surface of the base, and the mounting bracket 12 is also mounted on the upper surface of the base. In this way, the wire feed mechanism and the handheld laser welding machine can be combined into one. A single housing can simultaneously cover and protect the laser pump heat sink unit and the wire feeder unit, combining the laser pump heat sink unit and the wire feeder module into one; that is, the semiconductor pump module is fixed to the bottom of the phase-change heat sink, the fan is fixed to the side of the phase-change heat sink, and the wire feed mechanism is fixed to the upper portion of the phase-change heat sink via the mounting bracket. Two wire wheels 11 are fixed to the side of the mounting bracket 12 via the damping disk shaft 10. On the upper surface of the base, a mounting bracket 12 is located in front of the hollow portion. The hollow portion defines a plurality of ventilation holes extending along a first direction. In a cross-section perpendicular to the first direction, these holes create a good airflow path from the hollow portion to the front panel 4, achieving good heat dissipation. Preferably, the area ratio of the ventilation holes in the hollow portion is optimized to maximize airflow and heat dissipation efficiency.

[0026] When the wire feeding motor 13 is running, the welding wire on the wire wheel 11 can be smoothly fed out. When a new welding wire needs to be replaced, the end cover of the damping disc shaft 10 is removed and the welding wire 11 can be taken off.

[0027] The fan 7 is fixed to the rear side of the phase-change heat sink 1, and more specifically, is preferably fixed to the rear side of the hollow portion. When the laser welder is operating, the heat generated by the semiconductor pump module 16 is transferred upward from the bottom of the phase-change heat sink 8, and then to the hollow portion. After being transferred to the hollow portion, the heat is dissipated into the surrounding air through the fins of the hollow portion. The multiple ventilation holes in the hollow portion facilitate the outflow of the heated air. The fan 7 then extracts the heat from the interior of the laser welder through the gas flow channel, thereby achieving the purpose of reducing the internal temperature of the laser welder.

[0028] Preferably, the base portion is a plate-like structure, and a cavity for accommodating the phase-change heat dissipation material is provided inside the plate-like structure. Preferably, the base portion includes an upper side plate, a lower side plate, a left side plate, a right side plate, a front side plate, and a rear side plate. The cavity is sealed by the upper and lower side plates of the base portion and the surrounding side plates, and the cavity is filled with the phase-change heat dissipation material. The hollow portion can be a frame-type structure including a plurality of heat dissipation fins. The heat dissipation fins are preferably made of a metal or non-metallic material with good thermal conductivity. The metal material can be a metal such as copper, aluminum, or a metal alloy such as copper alloy or aluminum alloy. The non-metal can be made of thermally conductive plastic, etc. The hollow portion can be designed in the shape of a hollow grille, with each grille performing the function of a heat dissipation fin. The hollow portion preferably includes a base, which is fixed to the base portion. Preferably, the base of the hollow portion can be in direct contact with the base portion, or the base of the hollow portion can be in contact with the base portion through a thermally conductive material. The semiconductor pump module is fixed on the lower surface of the base. The heat generated by it is conducted into the base on the upper side. The heat is diffused to other positions of the base through the phase change heat dissipation material of the base. The heat is then conducted to the hollow part on the upper side of the base through heat transfer, and the heat of the hollow part is then taken away by airflow.

[0029] Preferably, multiple fins are used, and they can be arranged in a one-dimensional array or distributed in a two-dimensional array. The inventors have realized that if the temperature of a portion of the hollow portion is significantly lower than that of other areas, the air surrounding this portion of the hollow portion will not be able to effectively remove heat. Preferably, in order to allow the heat conducted from the base portion to the hollow portion to be more quickly diffused to every part of the entire hollow portion, such as all the fins arranged in a matrix, so as to facilitate more efficient heating of all the air surrounding the hollow portion and improve heat dissipation efficiency, the hollow portion is in the form of a frame, that is, the hollow portion includes a hollow portion frame, and the hollow portion frame preferably includes vertical support portions and horizontal support portions, which are interconnected to form a frame, and the fins are mounted on the vertical support portions and / or horizontal support portions of the frame. Preferably, the number of vertical support portions and horizontal support portions can be selected to be multiple. Preferably, the frame is made of a metal / alloy material with good thermal conductivity or a thermally conductive plastic. The inventors have realized that even if a metal material with extremely high thermal conductivity is used to make the frame, the typical heat conduction efficiency has an upper limit and its heat conduction is not fast enough. In order to quickly transfer heat from the base to every part of the frame, the inventors realized that heat convection can be used, that is, using phase-change heat dissipation material in the frame. Specifically, preferably, a frame heat dissipation channel containing the phase-change heat dissipation material is provided in the frame, and the phase-change heat dissipation material is injected into the frame heat dissipation channel. Preferably, vertical heat dissipation channels are provided in the vertical support portions of the frame, and horizontal heat dissipation channels are provided in the horizontal support portions of the frame. The vertical heat dissipation channels and the horizontal heat dissipation channels are connected, and the phase-change heat dissipation material can flow freely between the horizontal heat dissipation channels and the vertical heat dissipation channels. As a result, heat conducted from the bottom of the hollow portion can be quickly transferred to the entire hollow portion, thereby improving the ability of airflow to remove heat from the hollow portion. Vertical heat dissipation channels can be provided in most or all of the vertical support portions, and horizontal heat dissipation channels can be provided in most or all of the horizontal support portions. In this case, heat dissipation fins can be provided on the support portions, or the heat dissipation fins can be omitted, and heat dissipation can be directly achieved mainly by heat conduction between the multiple vertical support portions and the multiple horizontal support portions and the air.

[0030] The inventors realized that when the base portion uses phase change material for heat dissipation and the hollow portion uses phase change material for heat dissipation, the thermal conductivity and heat conduction rate of the base portion and the hollow portion are both very high. However, the thermal resistance at the contact point between the base portion and the hollow portion will be very high. Even if metal thermal conductive glue is used to assist in heat conduction or integral molding is used, this problem cannot be solved. The thermal resistance at the contact point between the base portion and the hollow portion will still be high, which will still greatly hinder the ultimate transfer of heat from the semiconductor pump module and the base portion to the air. Therefore, in order to improve the heat conduction efficiency between the base portion and the hollow portion and reduce the thermal resistance of the contact portion between the two, the inventors realized that the cavity containing the phase change heat dissipation material in the base portion can be connected to the frame heat dissipation flow channel in the hollow portion, thereby forming a phase change heat dissipation channel that is approximately L-shaped. The phase change heat dissipation material can be evaporated in the cavity within the base portion, then rise and transfer to the frame heat dissipation flow channel in the hollow portion, where it is cooled. The liquefied phase change material then flows downward back into the cavity of the base portion. This L-shaped phase change heat dissipation channel has the upper end of the L-shape as the condensation end. Due to the principle of heat convection, the evaporated phase change material will quickly rise to the condensation end after evaporation, and the condensed phase change material will quickly flow into the evaporation end, which is conducive to rapid heat conduction and circulation of the phase change material.

[0031] The semiconductor pump module and optical cavity device of the present invention are fixed to the lower surface of the base. The heat generated by them is conducted into the base above it, diffused to other locations of the base through the base's phase-change heat dissipation material, and then conducted to the hollow portion on the upper side of the base. The heat in the hollow portion is then removed by airflow. As to why the semiconductor pump module and optical cavity device must be placed on the lower surface of the base, this is because the semiconductor pump module and optical cavity module are the modules that generate the most concentrated and maximum heat, and installation on the lower surface of the base provides the best heat dissipation effect. The inventors also realized that if the output fiber is disturbed by the airflow, it will affect the light output pattern, thereby affecting the light output quality of the welding machine. Placing the semiconductor pump module and optical cavity on the lower surface of the base, i.e., outside the air duct, can prevent the airflow from affecting the output light pattern.

[0032] The wire feeding motor of the present invention is located on the upper surface of the base part, and the heat generated by the wire feeding motor can also be conducted to the base part below it. The phase change heat dissipation material in the base part diffuses the heat generated by the wire feeding motor to the lower side of the hollow part, and then conducts the heat to the hollow part through heat conduction or phase change material, and then takes the heat of the hollow part away through airflow.

[0033] The present invention utilizes a single, integral base portion of the phase-change heat sink to simultaneously dissipate heat from two heat sources: the semiconductor pump module, the optical cavity device, and the wire feed motor. This effectively integrates the wire feed motor and the semiconductor heat sink, resulting in a rational structure and significant benefits. The two heat sources, the semiconductor pump module 2 and the wire feed motor 3, are located on the front and back sides of the phase-change heat sink's base, respectively. This allows for efficient utilization of the heat-conducting surface of the heat sink, reducing the overall volume and surface area requirements of the base. Furthermore, the reduced base volume effectively shortens the heat conduction path, thereby improving heat dissipation efficiency.

[0034] The base portion can be divided into a front region and a rear region, with the hollow portion located in the rear region. The base portion's accommodating cavities are distributed across the front and rear regions. Since the rear region corresponds to the hollow portion, and the hollow portion also serves as the condensation end of the phase-change heat sink, the semiconductor pump module 2 is located not only on the underside of the base portion but also substantially on the front side of the rear region. Therefore, the inventors hope that after condensing in the hollow portion, the phase-change material can more quickly flow back to the region corresponding to the semiconductor pump module 2. Therefore, it is hoped that the bottom height of the accommodating cavity within the base portion is not uniform across the entire region, but rather extends obliquely downward from the rear region toward the front.

[0035] The phase change material is preferably a vapor-liquid phase change material.

[0036] The movable door panel 3 is fixed to the first housing 6 of the laser welding machine through the hinge 2. When a new welding wire needs to be replaced, open the movable door panel 3, remove the end cover of the damping disk shaft 10, and then remove the welding wire wheel 11. The welding wire wheel 11 is fixed to the right side of the mounting bracket 12 through the damping disk shaft 10, and the power supply 14 and the control board 15 are fixed to the left side of the mounting bracket 12. The mounting bracket 12 and the wire feeding motor 13 are fixed to the upper part of the base of the phase change radiator 8.

[0037] The phase-change heat sink 8 is mounted on the bottom housing 9. The phase-change heat sink 8 is secured to the laser welding machine housing 6, the front panel 4, and the rear panel 17 through the bottom housing 9. The fan 7 and fan protection cover 18 are secured to the side of the phase-change heat sink through the rear panel 17. The touchscreen display 5 is secured to the front panel 4. Laser welding machine parameters, such as wire feed speed and laser light intensity, can be modified through the touchscreen display 5 to meet welding requirements for different thicknesses and materials. Preferably, the bottom housing 9 may include a rectangular frame with a hollow mounting cavity. The base of the phase-change heat sink is housed within the hollow mounting cavity of the frame. Alternatively, the bottom housing may be omitted, and the mounting cavity structure may be formed by the lower portions of the side panels surrounding the laser welding machine housing. During operation, heat generated by the semiconductor pump module 16 is transferred upward from the bottom of the phase-change heat sink 8. The fan 7 then extracts the heat from the laser welding machine through the gas flow channel, thereby reducing the internal temperature of the laser welding machine.

[0038] Preferably, the wind direction can flow from the front side to the back side, that is, the air is blown in from the ventilation holes of the front panel of the welding machine along a first direction, flows through the mounting bracket and its surroundings, and then blows into the multiple ventilation holes of the hollow part, and then flows out from the laser welding machine.

[0039] FIG5 shows a preferred embodiment of a mounting bracket. The mounting bracket preferably has a "J"-shaped structure and includes two side panels and a top panel. The two side panels and the top panel form a stable "J"-shaped support structure. The two side panels are divided into a left side panel and a right side panel. The bottoms of the two side panels are fixed to the base portion. The top panel is fixedly connected to the upper sides of the two side panels. The top panel and the two side panels together enclose a ventilation cavity extending along a first direction, i.e., a cavity that can be ventilated from front to back. Two welding wire wheels are fixed to the sides of the mounting bracket via a damping disk shaft, i.e., mounted on the side panels of the mounting bracket. On the upper surface of the base portion, the mounting bracket is located in front of the hollow portion. The ventilation cavity of the mounting bracket extends in the first direction. The hollow portion defines a plurality of ventilation holes extending in the first direction. In a cross section perpendicular to the first direction, at least a portion of the multiple ventilation holes in the hollow portion are projected within the projection of the ventilation cavity of the mounting bracket, thereby forming a good airflow channel from the hollow portion to the mounting bracket, thereby achieving good heat dissipation. Preferably, it is necessary to optimize the area ratio of the ventilation holes in the hollow part and the area ratio of the ventilation holes within the projection range of the ventilation cavity to maximize the airflow efficiency and heat dissipation efficiency. On the cross section perpendicular to the first direction, the projected area of ​​the hollow part is set to S, and the total area of ​​the ventilation holes on the hollow part is set to S1. The inventors have found through simulation that a better heat dissipation effect can be obtained when the area ratio of the ventilation holes S1 in the hollow part to the area S of the entire hollow part is controlled to be above 30%. On the cross section perpendicular to the first direction, the projected area of ​​the ventilation cavity of the mounting bracket is set to S2; on the cross section perpendicular to the first direction, the projection range P of the ventilation cavity of the mounting bracket includes the projections of several ventilation holes on the hollow part, and the projection area of ​​these several ventilation holes is S4; the inventors have found through simulation that if good ventilation and heat dissipation are to be achieved, it is necessary to ensure that S2 / S is greater than 40%. At the same time, the inventors realized that if the ventilation holes on the hollow portion are evenly distributed, then a large portion of the ventilation holes will be blocked by the wire feeding mechanism. The inventors realized that if the ventilation holes are not evenly distributed, but the area of ​​the ventilation holes within the projection range of the ventilation cavity of the mounting bracket is higher than the area of ​​the ventilation holes in other areas, the efficiency of ventilation and heat dissipation can be greatly improved. Therefore, S4 / S2>(3*S1) / (2*S) can be set. Preferably, the wind direction can flow from the front to the back, that is, air is blown in from the front of the base along a first direction, flows through the ventilation cavity of the mounting bracket and its surroundings, and then blows into the multiple ventilation holes of the hollow portion, and then flows out from the laser welding machine.

[0040] On the upper surface of the base, the mounting bracket is located at the front end of the hollow portion. The most important purpose of the present invention is to use airflow to dissipate heat from the lower base. Therefore, it is urgently needed to further improve the heat dissipation effect in this regard. Based on this, the inventors have realized that since the mounting bracket has an X-shaped structure and a large mounting surface area, if the multiple surfaces of the mounting bracket can be effectively utilized to dissipate heat, the heat dissipation effect can be greatly improved. Therefore, the inventors have realized that the rear surface of the mounting bracket can be effectively thermally conductively contacted with the hollow portion, thereby greatly increasing the heat dissipation surface area of ​​the mounting bracket. Therefore, preferably, the rear surface of the mounting bracket is in direct contact with the hollow portion or in contact with it through thermally conductive adhesive. In addition, preferably, the upper plate of the mounting bracket has a protrusion extending rearward, the protrusion extending rearward and covering the upper surface of the hollow portion. The protrusion is in thermal contact with the upper surface of the hollow portion (including direct contact or contact through thermally conductive adhesive). As a result, the heat from the hollow portion can be quickly transferred to the mounting bracket, and the large contact area between the mounting bracket and the heat dissipation airflow is utilized to improve the heat dissipation effect. Preferably, the length of the protrusion covering the hollow portion in the front-to-back direction is greater than 50% of the length of the hollow portion in the front-to-back direction, and the area of ​​the protrusion covering the hollow portion is greater than 15% of the upper surface area of ​​the hollow portion.

[0041] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and are not to be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will readily conceive of other specific embodiments of the present invention without inventive effort, and such embodiments will fall within the scope of protection of the present invention.

Claims

1. A laser welding machine, comprising a welding machine housing, a phase change heat sink, a semiconductor pump module, an optical cavity device, a mounting bracket, a wire feeding mechanism, a fan, and a welding gun; the phase change heat sink comprises a plate-shaped base portion located at the bottom, the base portion comprises a cavity for accommodating a phase change material, the cavity is filled with the phase change material, and the phase change heat sink further comprises a hollow portion located at the top; the hollow portion forms a plurality of ventilation holes extending along a first direction; the semiconductor pump module and the optical cavity device are fixed to the bottom of the phase change heat sink, which are fixed to the lower surface of the base portion; the mounting bracket is fixed to the upper surface of the base portion; the wire feeding mechanism is fixed to the upper portion of the phase change heat sink through the mounting bracket; the fan is used to accelerate the airflow passing through the hollow portion.

2. According to the laser welding machine of claim 1, the hollow part is designed as a hollow grille, the hollow part is connected to the upper side of the base part, the fan is fixed on the rear side of the hollow part, the base part is divided into a front area and a rear area, and the hollow part is located on the upper side of the rear area of the base part.

3. The laser welding machine according to claim 2, the hollow part includes a hollow part frame, and the hollow part frame preferably includes a vertical support part and a horizontal support part, and the vertical support part and the horizontal support part are interconnected to form a frame; a frame heat dissipation channel for accommodating a phase change heat dissipation material is provided in the frame, and the phase change heat dissipation material is injected into the frame heat dissipation channel, a vertical heat dissipation channel is provided in the vertical support part of the frame, and a horizontal heat dissipation channel is provided in the horizontal support part of the frame, the vertical heat dissipation channel and the horizontal heat dissipation channel are connected, and the phase change material can flow and exchange freely between the horizontal heat dissipation channel and the vertical heat dissipation channel.

4. According to the laser welding machine of claim 3, the accommodating cavity for accommodating the phase change heat dissipation material in the base portion is connected to the frame heat dissipation channel in the hollow portion, forming an L-shaped phase change heat dissipation channel; the phase change heat dissipation material can be evaporated in the accommodating cavity in the base portion, then rise and transfer to the frame heat dissipation channel in the hollow portion, be cooled in the frame heat dissipation channel in the hollow portion, and then the liquefied phase change material flows downward back into the accommodating cavity in the base portion.

5. According to the laser welding machine of claim 1, on the upper surface of the base part, the mounting bracket is located at the front side of the hollow part, and the welding wire wheel is fixed to the side of the mounting bracket through the damping disk shaft; the welding machine housing includes a first shell of the laser welding machine, a front panel, and a rear panel; the fan extracts heat from the inside of the laser welding machine through the gas flow channel, and the air is blown into the multiple ventilation holes of the hollow part and then flows out of the laser welding machine; when the wire feeding motor is running, the welding wire on the welding wire wheel can be smoothly fed out. When a new welding wire needs to be replaced, the end cover of the damping disk shaft is removed to remove the welding wire.

6. The laser welding machine according to claim 5, the welding machine shell includes a bottom shell, and the first shell of the laser welding machine also includes a movable door panel, which is fixed to the laser welding machine shell by a hinge. When a new welding wire needs to be replaced, the movable door panel is opened, the damping disk shaft end cover is removed, and the welding wire wheel can be removed. The welding wire wheel is fixed to the right side of the mounting bracket through the damping disk shaft, the power supply and control board are fixed to the left side of the mounting bracket, and the mounting bracket and the wire feeding motor are fixed to the upper part of the base of the phase change radiator; the control panel can coordinate and control the light source system and the wire feeding motor of the laser welding machine to achieve matching of the working state of the wire feeding motor with the working state of the light source system of the laser welding machine.

7. According to the side laser welding machine according to claim 5, the welding gun is a handheld welding gun, which is fixed to the front panel of the laser welding machine through a flexible sleeve. The wire feeding motor and the laser welding machine light source system are coordinated by the control panel to respectively deliver the welding wire on the wire wheel and the laser light source to the predetermined position of the end of the handheld welding gun through the flexible sleeve.

8. According to the laser welding machine of claim 1, the semiconductor pump module and the optical cavity device are fixed on the lower surface of the base portion, and the heat generated by them is conducted into the base portion on the upper side thereof, and the heat is diffused to the portion of the base portion located below the hollow portion through the phase change heat dissipation material of the base portion, and then the heat is transferred to the hollow portion on the upper side of the base portion. Air passes through the hollow gaps of the radiator fins, and then the heat of the hollow portion is taken away by the airflow.

9. According to the laser welding machine of claim 1, the base part is divided into a front area and a rear area, the cavity of the base part containing the phase change material is distributed in the front area and the rear area, the fan is fixed on the rear side of the hollow part, and the hollow part is located on the upper side of the rear area of the base part; the height of the bottom of the accommodating cavity in the base part is not consistent in the entire area, and the bottom of the accommodating cavity in the base part extends obliquely downward from the rear area to the front side.

10. The laser welding machine according to claim 8, wherein the phase change material is a vapor-liquid phase change material, and further includes a wire feeding motor, which is located on the upper side of the front area of the base portion. The heat generated by the wire feeding motor can be conducted to the base portion below it, and the phase change heat dissipation material in the base portion diffuses the heat generated by the wire feeding motor to the lower side of the hollow portion, and then transfers the heat to the hollow portion, and then takes the heat of the hollow portion away through the airflow. The wire feeding mechanism and the wire feeding motor are both located on the right side of the mounting bracket.

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