Tube bundle type container frame manufacturing and welding device

Abstract

The invention relates to the technical field of tube bundle type container frame welding, in particular to a tube bundle type container frame manufacturing and welding device which comprises a welding mechanism, a welding mechanism and a welding mechanism. The detection mechanism is used for obtaining an air thermograph of the arc distribution space and air flow rates of a plurality of positions of the welding area; the control mechanism is used for determining a pre-injection area, estimating the air separation direction of the protective gas according to the relative proportion of the width of the tip of the protective gas and the angle range of the protective gas, and then determining the injection amount and injection speed of the protective gas; determining a spraying strategy of the number of nozzles for spraying protective gas according to the number and the position of the weak areas in the air separation direction; according to the invention, the oxidation reaction between the welding flux in the welding area and air is further prevented by adjusting the protective gas injection area.

Description

Technical Field

[0001] The present invention relates to the technical field of tube bundle type container frame welding, in particular to a tube bundle type container frame manufacturing and welding device. Background Art

[0002] In modern welding technology, the core function of shielding gas is to isolate the welding area from the air and prevent oxidation reactions between the metal base material and the solder at high temperatures, thereby ensuring the mechanical properties and air tightness of the weld. Traditional shielding gas control systems usually adopt fixed flow or segmented flow control strategies, and traditional systems do not detect the actual coverage area of ​​the shielding gas in real time. When the arc hot air flow rate accelerates, the shielding gas is easily squeezed, causing oxidation in the welding area. The existing technology lacks real-time analysis of the arc hot air and shielding gas flow fields, and cannot quickly identify changes in the direction of air separation.

[0003] In the prior art, Chinese patent publication number CN119927529A discloses a welding device and welding method for a steel structure frame, comprising a base plate, two movable welding mechanisms provided on the base plate, two control seats provided on the base plate, the two control seats provided between the two movable welding mechanisms, two movable seats provided on the two control seats, two rotating plates and two bearing plates provided on the opposite surfaces of the two movable seats, the bearing plates provided on the lower side of the rotating plates, the control seats and the movable seats are hollow inside, a screw is rotatably connected to the bottom wall of the control seat, a control mechanism is provided on the screw, and a threaded sleeve on the outer surface of the screw is provided with a threaded sleeve. The sleeve and the outer surface of the threaded sleeve are fixedly connected with an L-shaped rod. The present invention can automatically turn over the steel structure frame after the multi-axis welding robot completes welding one side of the steel structure frame, which will not affect the time of welding the steel structure frame too much, and further ensure the efficiency and speed of welding the steel structure frame; it can be seen that the welding device and welding method for the steel structure frame have the problem that when the shielding gas is filled into the area to be welded, the shielding gas will be squeezed by the hot air of the arc, resulting in a reduction in the coverage area of ​​the metal parts to be welded in the welding area, thereby causing some of the metal parts to be welded to come into contact with the air and undergo oxidation reactions. Summary of the Invention

[0004] To this end, the present invention provides a tube bundle container frame manufacturing welding device to overcome the problem in the prior art that when the shielding gas is filled into the area to be welded, the shielding gas is squeezed by the hot air from the arc, resulting in a reduced coverage area of ​​the metal parts to be welded in the welding area, thereby causing some of the metal parts to be welded to come into contact with the air and undergo oxidation reactions.

[0005] To achieve the above-mentioned object, the present invention provides a tube bundle container frame manufacturing and welding device, comprising: A welding mechanism for welding and fixing metal parts to be welded on a tube bundle container frame, comprising a welding head for converting solid solder into molten solder, a gas storage portion for storing shielding gas, and a plurality of nozzles connected to the gas storage portion for releasing shielding gas into the welding area; a detection mechanism connected to the welding mechanism, for respectively acquiring an air thermal image of the arc distribution space and air flow rates at a plurality of sampling positions above the welding area; A control mechanism, which is respectively connected to the welding mechanism and the detection mechanism, is used to determine the air squeezing area around the welding head according to the air thermal image, determine the pre-injection area of ​​the shielding gas according to the air squeezing area, estimate the air separation direction of the shielding gas according to the relative proportion determined by the width of the shielding gas tip and the length of the straight lines at both ends of the arc corresponding to the angular range of the shielding gas entering the welding area, determine the injection amount and injection speed of the shielding gas according to the air separation direction, and determine the number of nozzle openings according to the number and position of weak areas in the air separation area included in the dispersed air separation direction, wherein, The air separation direction includes a centralized type and a dispersed type.

[0006] Furthermore, the detection mechanism includes: Thermocouple array, which collects the temperature at several corresponding heat sampling points to form an air thermal map of the arc distribution space; The ultrasonic wind velocity array is used to obtain the air flow velocity at several locations in the welding area.

[0007] Furthermore, the temperatures of all heat sampling points in the arc distribution space are greater than the preset temperature, and the maximum spatial area connected and enclosed by all heat sampling points including the arc space that meet the temperature greater than the preset temperature is determined as the air compression area around the welding head.

[0008] Furthermore, the horizontal plane where the metal parts to be welded are located is taken as the first plane, and the horizontal plane where the nozzle with the largest vertical height perpendicular to the plane where the metal parts to be welded are located is taken as the second plane, and the area enclosed by the first plane, the second plane and the edge surface of the air extrusion area is determined as the pre-injection area of ​​the protective gas.

[0009] Furthermore, based on the ultrasonic wind speed array detecting the width of the shielding gas tip within the first preset time when the shielding gas enters the pre-injection area, the relative proportion is the ratio of the width of the shielding gas tip to the length of the straight lines at both ends of the arc corresponding to the angle range of the shielding gas entry as the preset relative proportion.

[0010] Furthermore, when the relative proportion is greater than or equal to a preset proportion, it is determined that the air separation direction is a dispersed type; If the air separation direction is dispersed, the weak area whose temperature exceeds the standard temperature of the protective gas by a preset amount and whose residence time around the protective gas is greater than or equal to the preset residence time is divided into the first weak area and the second weak area. The first weak area is above the protective gas tip, and the second weak area is around the protective gas tip except the top.

[0011] Furthermore, based on the existence of a first weak area above the tip of the shielding gas, whose direction is opposite to the injection direction of the shielding gas, the injection amount of the shielding gas is increased; if the second weak area exists, the number and position of the second weak sub-areas in the second weak area are obtained, and the corresponding opening number of the nozzle is adjusted according to the number of projection points of the second weak sub-areas on the plane perpendicular to the injection direction, and the injection angle and injection amount of each nozzle are adjusted according to the number of second weak sub-areas closest to the plane perpendicular to the injection direction.

[0012] Furthermore, based on the temperature boundary surface around the protective gas of the second weak area, a plurality of second weak sub-areas are identified, the positions of the plurality of nozzles are adjusted to above each second weak sub-area, and the injection strategy of the nozzle at this time is to adjust the injection amount of the second weak sub-area to the injection amount of the first weak area, wherein, The number of opened nozzles is equal to the sum of the number of first weak areas of the weak area and the number of projection points of the second weak sub-area at different positions on a plane perpendicular to the injection direction.

[0013] Furthermore, based on the relative proportion being less than a preset proportion, it is determined that the air separation direction is concentrated, and the current injection speed value of the shielding gas is obtained, and the injection speed of the shielding gas is increased.

[0014] Furthermore, the injection velocity is negatively correlated with the temperature of the gas surrounding the protective gas.

[0015] Compared with the prior art, the beneficial effect of the present invention lies in that the present invention obtains the air thermal map of the welding area and the air flow rate at several positions of the welding area and the area where the arc hot air generated by the welding head squeezes the shielding gas as a shielding gas pre-injection area by setting a detection mechanism, so that the shielding gas is not affected by the arc hot air, and the shielding air is positioned, quantitatively and speedily sprayed into the welding area, thereby improving the shielding gas injection efficiency into the welding area, and greatly slowing down the speed of the oxidation reaction between the metal parts to be welded and the solder during welding, so that the solder formed after the tube bundle container frame is welded has stronger rigidity and better airtightness; by determining the shielding gas injection amount according to the air separation direction, the shielding gas injection amount is made more accurate, so as to achieve improved shielding gas injection efficiency; by determining the shielding gas injection speed to increase according to the air separation direction being concentrated, the protection range of the shielding gas during the welding process and the improvement of the shielding gas injection efficiency are further enhanced.

[0016] Furthermore, the present invention obtains the air thermal image of the welding area and the air flow rate at several positions of the welding area, analyzes the arc hot air in the welding area and the air flow rate at several positions of the welding area, and provides data support for the subsequent determination of the air separation direction type.

[0017] Furthermore, the present invention sets a control structure connected to the detection mechanism, so that the control structure analyzes the flow trend of the arc hot air and shielding gas in the welding area according to the detection mechanism and adjusts the multiple nozzles to spray to the preset position, direction, and at a preset speed and injection amount.

[0018] Furthermore, the present invention adjusts the injection amount or injection speed of the shielding gas by detecting the relative proportion of the width of the shielding gas tip at the first preset time when the shielding gas enters the pre-injection area and the angular range of the shielding gas entry, thereby improving the injection efficiency and injection accuracy of the shielding gas.

[0019] Furthermore, the present invention adjusts the injection angle and injection amount of the nozzle accordingly by determining the sum of the number of the first weak areas and the number of the second weak sub-areas, thereby optimizing the distribution of the shielding gas, improving the welding quality, and ensuring that the shielding gas effectively covers the welding area.

[0020] Furthermore, the present invention determines that the air separation direction is concentrated, adjusts and increases the injection speed of the shielding gas to improve the injection efficiency of the shielding gas into the welding area and ensures the effective coverage of the shielding gas on the welding area, thereby preventing the welding area from being polluted and oxidized by the air.

[0021] Furthermore, the present invention provides a cooling mechanism to perform air circulation cooling on the welding area to improve the air tightness between the solder in the welding area and the metal parts to be welded and the rigidity of the solder in the welding area. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a block diagram of the overall structure of the welding device for making a bundled container frame according to an embodiment of the present invention; Figure 2 For the embodiment of the present invention, the bundled container frame is made of a welding device for welding the welding mechanism and the metal parts to be welded and the edge of the air squeeze area of ​​the front cross-sectional view; Figure 3 A schematic diagram showing the width and edge contour of the shielding gas tip of a welding device for manufacturing a tube bundle container frame according to an embodiment of the present invention; Explanation of reference numerals: 1-edge surface of air squeezing area, 2-welding head, 3-metal parts to be welded, 4-first plane, 5-second plane, 6-tip boundary contour, 7-nozzle, 8-gas storage part. DETAILED DESCRIPTION

[0023] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention.

[0024] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0025] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0026] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0027] See also Figure 1 、 Figure 2 and Figure 3The figures show the overall structural block diagram of the welding device for manufacturing a bundled container frame according to an embodiment of the present invention, a front cross-sectional view of the edge of the welding mechanism, the metal parts to be welded, and the air compression area, a schematic diagram of the width of the shielding gas tip, and a schematic diagram of the width of the shielding gas tip and the outline of the tip boundary. The welding device for manufacturing a bundled container frame according to the present invention comprises: A welding mechanism for welding and fixing metal parts to be welded on a tube bundle container frame, comprising a welding head for converting solid solder into molten solder, a gas storage portion for storing shielding gas, and a plurality of nozzles connected to the gas storage portion for releasing shielding gas into the welding area; a detection mechanism connected to the welding mechanism, for respectively acquiring an air thermal image of the arc distribution space and air flow rates at a plurality of sampling positions above the welding area; A control mechanism, which is respectively connected to the welding mechanism and the detection mechanism, is used to determine the air squeezing area around the welding head according to the air thermal image, determine the pre-injection area of ​​the shielding gas according to the air squeezing area, estimate the air separation direction of the shielding gas according to the relative proportion determined by the width of the shielding gas tip and the length of the straight lines at both ends of the arc corresponding to the angular range of the shielding gas entering the welding area, determine the injection amount and injection speed of the shielding gas according to the air separation direction, and determine the number of nozzle openings according to the number and position of weak areas in the air separation area included in the dispersed air separation direction, wherein, The air separation direction includes a centralized type and a dispersed type.

[0028] Specifically, the gas storage unit is a high-pressure gas cylinder.

[0029] In practice, the present invention is further provided with a cooling mechanism connected to the welding mechanism to perform air circulation cooling on the welding area to improve the air tightness between the solder in the welding area and the metal part 3 to be welded and the rigidity of the solder in the welding area.

[0030] Specifically, the cooling mechanism can adopt a water-cooled welding gun solution, and the cooling mechanism includes a circulating water pump, a water tank / heat exchanger, a water pipe loop, a temperature sensor and a flow meter; the operation process of the cooling mechanism is a conventional technical means well known to those skilled in the art, and the operation process and operation principle will not be repeated here.

[0031] Specifically, the detection mechanism includes: Thermocouple array (not shown) collects temperatures at several corresponding heat sampling points to form an air thermal map of the arc distribution space; An ultrasonic wind velocity array (not shown) is used to obtain air flow velocities at several locations in the welding area.

[0032] It will be understood by those skilled in the art that the setting position of the thermocouple array can be embedded in the welding gun nozzle, which is non-contact, or it can be set on the welding workbench. Those skilled in the art can make corresponding adjustments and selections according to actual conditions; the setting position of the ultrasonic wind speed array can be to evenly arrange several ultrasonic probes around the circumference of the welding gun nozzle, and the number can be set accordingly according to actual conditions; or the ultrasonic wind speed array can also be set on a cantilever above the metal part to be welded, and the specific setting position can be adaptively set according to actual conditions; no specific limitation is made here.

[0033] In the present invention, the thermocouple array uses a FLIR A655sc thermocouple array with a resolution of 0.1 mm / pixel, a temperature measurement range of -40°C to 1200°C, and a frame rate of 60 Hz; the ultrasonic wind velocity array uses an ultrasonic wind velocity array with a frame rate of 1000 fps.

[0034] In implementation, the present invention obtains the air thermal image of the welding area and the air flow rate at several positions of the welding area, analyzes the arc hot air in the welding area and the air flow rate at several positions of the welding area, and provides data support for the subsequent determination of the air separation direction type.

[0035] Specifically, the temperatures of all heat sampling points in the arc distribution space are greater than the preset temperature, and the maximum spatial area connected and enclosed by all heat sampling points including the arc space that meet the temperature greater than the preset temperature is determined as the air compression area around the welding head.

[0036] In implementation, the present invention connects the control structure with the detection mechanism, so that the control structure analyzes the flow trend of the arc hot air and the shielding gas in the welding area according to the detection mechanism and adjusts the preset positions and directions of the multiple nozzles to spray at a preset speed and injection amount.

[0037] Specifically, the air thermal map of the welding area and the air flow rate at several positions in the welding area are obtained through a thermocouple array and an ultrasonic wind speed array. The thermocouple array can display the air of different temperatures in the welding area in different colors or grayscales to form an air thermal map. Based on the air thermal map and the air flow rate analysis at several positions in the welding area, the edge surface of the air extrusion area is formed by smoothly connecting the heat points on the air thermal map where the heat difference between the arc hot air and the shielding gas is greater than the first preset heat difference.

[0038] Please refer to Figure 2The horizontal plane where the metal parts to be welded are located is taken as the first plane 4, the horizontal plane where the nozzle with the largest vertical height perpendicular to the plane where the metal parts to be welded are located is taken as the second plane 5, and the area surrounded by the first plane 4, the second plane 5 and the edge surface 1 of the air extrusion area is determined as the pre-injection area of ​​the shielding gas.

[0039] Specifically, based on the ultrasonic wind speed array detecting the width of the shielding gas tip within the first preset time when the shielding gas enters the pre-injection area, the relative proportion is the ratio of the width of the shielding gas tip to the length of the straight lines at both ends of the arc corresponding to the angle range of the shielding gas entry as the preset relative proportion.

[0040] Please refer to Figure 3 The width of the shielding gas tip is the maximum width of the tip boundary contour 6 formed after the shielding gas is ejected within the first preset time on a straight line perpendicular to the injection direction.

[0041] Specifically, Figure 3 The direction indicated by the arrow is the injection direction of the protective gas.

[0042] Specifically, in the air thermal image, the shielding gas will present a specific temperature distribution area because its temperature is lower than that of the arc hot air. The threshold segmentation image processing method is used to identify the tip boundary contour of the shielding gas when it enters the pre-injection area. On the tip boundary contour, a straight line is drawn perpendicular to the gas flow direction, and the number of pixels where the straight line intersects the tip boundary contour is counted. The number of pixel points is calculated as the tip width; according to the flow trend of the shielding gas in the air thermal image, the nozzle center of the welding head 2 is taken as the vertex, and the angle range of the gas flow direction is the entry angle. The angle range is converted into radians, and the relative proportion is equal to the width of the tip divided by the value of the angle range.

[0043] In this embodiment, the first preset time for spraying the protective gas is set to 3 seconds.

[0044] A specific embodiment is to use the FLIR A655sc thermocouple array with a resolution of 0.1mm / pixel, a temperature measurement range of -40°C to 1200°C, and a frame rate of 60Hz to capture the air thermal image of the welding area in real time, and use an ultrasonic wind velocity array with a frame rate of 1000fps to observe the gas flow trajectory. Thermocouple array identifies the pixel points of the welding area and converts them into the actual area of ​​25 ; The pixel distance between the two points where the straight line observed by the thermocouple array intersects the tip boundary contour is 80 pixels, so the tip width is 8 mm; It is known that the distance from the nozzle to the pre-injection area is 20 mm. A spherical coordinate system is established with the nozzle center as the origin, and the angle of the gas flow trajectory is identified using an image processing algorithm. and , is 15°, If it is 45°, the angle range is 30°, which is converted to radians as 0.524rad. The length of the straight lines at both ends of the arc corresponding to the angle range = r×Δθ=20mm×0.524rad=10.48mm. According to the relative proportion equal to the width of the tip divided by the length of the straight lines at both ends of the arc corresponding to the angle range for the shielding gas to enter, the relative proportion is 8mm / 10.48mm=76.3%=0.763.

[0045] In implementation, the present invention adjusts the injection amount or injection speed of the shielding gas by detecting the relative proportion of the width of the shielding gas tip at the first preset time when the shielding gas enters the pre-injection area and the length of the straight lines at both ends of the arc corresponding to the angle range of the shielding gas entry, thereby improving the injection efficiency and injection accuracy of the shielding gas.

[0046] Specifically, when the relative proportion is greater than or equal to a preset proportion, it is determined that the air separation direction is a dispersed type; If the air separation direction is dispersed, the weak area whose temperature exceeds the standard temperature of the protective gas by a preset amount and whose residence time around the protective gas is greater than or equal to the preset residence time is divided into the first weak area and the second weak area. The first weak area is above the protective gas tip, and the second weak area is around the protective gas tip except the top.

[0047] In this embodiment, it was found through experiments and actual application data that when the relative proportion reaches 0.7, the distribution range of the protective gas is significantly expanded, and a dispersed flow is easily formed; when the ambient air temperature exceeds 1.2 times the standard temperature of the protective gas, the unevenness of the gas flow increases significantly; when the residence time reaches 2s, the temperature distribution in the weak area tends to be stable, and the preset amount is set to 1.2 times the standard temperature of the protective gas, the preset residence time is 2s, and the preset proportion is 0.7.

[0048] Specifically, based on the existence of a first weak area above the tip of the shielding gas, whose direction is opposite to the injection direction of the shielding gas, the injection amount of the shielding gas is increased; if the second weak area exists, the number and position of the second weak sub-areas in the second weak area are obtained, and the corresponding opening number of the nozzle is adjusted according to the number of projection points of the second weak sub-areas on the plane perpendicular to the injection direction, and the injection angle and injection amount of each nozzle are adjusted according to the number of second weak sub-areas closest to the plane perpendicular to the injection direction.

[0049] When a second weak area is detected in the weak area, the position of the corresponding second weak sub-area relative to the shielding gas tip is detected, and it is detected that the projection points of the second weak sub-area at different positions on the plane perpendicular to the injection direction are respectively located to the left, right and below the shielding gas tip. The number of nozzles at this time is adjusted to 3, and the angle of each nozzle is adjusted using the angle between the perpendicular bisector of the nozzle and the center point of the corresponding second weak sub-area as the deflection angle. After the angle adjustment, the injection strategy of the nozzle at this time is adjusted to the injection amount adjustment method for the first weak area.

[0050] Specifically, based on the temperature boundary surface around the protective gas in the second weak area, a plurality of second weak sub-areas are identified, the positions of the plurality of nozzles are adjusted to above each second weak sub-area, and the injection strategy of the nozzle at this time is to adjust the injection amount of the second weak sub-area to the injection amount of the first weak area, wherein, The number of opened nozzles is equal to the sum of the number of first weak areas of the weak area and the number of projection points of the second weak sub-area at different positions on a plane perpendicular to the injection direction.

[0051] In a specific embodiment, the number of the first weak areas detected at this time is 1, the number of projection points of the second weak sub-areas at different positions on the plane perpendicular to the injection direction is 3, and the number of nozzles is 4.

[0052] In implementation, the present invention adjusts the injection angle and injection amount of the nozzle accordingly by determining the sum of the number of the first weak area and the number of projection points of the second weak sub-area at different positions on the plane perpendicular to the injection direction, thereby optimizing the distribution of the shielding gas, improving the welding quality, and ensuring that the shielding gas effectively covers the welding area.

[0053] Specifically, based on the relative proportion being less than a preset proportion, it is determined that the air separation direction is concentrated, and the current injection speed value of the shielding gas is obtained, and the injection speed of the shielding gas is increased.

[0054] A specific embodiment is that under standard atmospheric pressure, the initial injection volume is 12 L / min, the shielding gas temperature is 28°C, and the air separation direction is centralized. The shielding gas injection volume needs to be increased to 12 L within the preset time (0.5 minutes). The adjusted injection speed is the preset injection volume divided by the preset time, that is, the adjusted injection speed = 12 / 0.5 = 24 L / min.

[0055] Specifically, the injection speed is negatively correlated with the temperature of the gas surrounding the shielding gas.

[0056] During implementation, the present invention determines that the air separation direction is concentrated, adjusts and increases the injection speed of the shielding gas, improves the injection efficiency of the shielding gas into the welding area, ensures the effective coverage of the shielding gas on the welding area, and prevents the welding area from being polluted and oxidized by the air.

[0057] In practice, the present invention provides a cooling mechanism to perform air circulation cooling on the welding area to improve the air tightness between the solder in the welding area and the metal parts to be welded and the rigidity of the solder in the welding area.

[0058] Working process: The solder is evenly distributed on the welding area of ​​the metal parts to be welded through the welding head; the gas storage part 8 releases the shielding gas, and the shielding gas is sprayed into the welding area through several nozzles to isolate the air from the welding area to prevent oxidation and contamination. The air thermal image of the arc distribution space is obtained through the thermocouple array to analyze the temperature distribution of the welding area. The air flow rate at several sampling positions in the welding area is obtained through the ultrasonic wind speed array to analyze the flow state of the shielding gas. According to the air thermal image, the heat points of the arc hot air and the shielding gas generated by the welding head are identified, and the heat points with a heat difference greater than a first preset heat difference are calculated. The heat points are smoothly connected to form the edge surface 1 of the air extrusion area, and the air extrusion area is determined. The plane above the metal parts 3 to be welded is used as the first plane 4, and the plane below the nozzle 7 with the largest vertical height perpendicular to the plane of the metal parts 3 to be welded is used as the second plane 5. The area surrounded by the first plane 4, the second plane 5 and the edge surface 1 of the air extrusion area is determined as the pre-injection area of ​​the shielding gas. Using an ultrasonic wind velocity array, the shielding gas tip width is measured within a first preset time period as the shielding gas enters the pre-injection area. The relative proportions are calculated based on the shielding gas tip width and the lengths of the lines at both ends of the arc corresponding to the shielding gas entry angle range. The shielding gas air separation direction is estimated based on the relative proportions of the tip width and the entry angle range. If the shielding gas is dispersed, the air temperature surrounding the shielding gas is measured to identify weak areas with temperatures greater than a preset multiple of the shielding gas standard temperature. Based on the time the weak areas spend around the shielding gas, they are divided into a first weak area (located above the shielding gas tip) and a second weak area (located around the shielding gas tip). The shielding gas injection rate is increased for the first weak area, and the number of nozzles, injection angle, and injection rate are adjusted based on the number and location of the second weak areas. If the shielding gas is concentrated, the shielding gas temperature surrounding the shielding gas is less than or equal to a preset multiple of the shielding gas standard temperature, and the shielding gas injection rate is increased to ensure that the shielding gas reaches the preset injection rate within the preset time. After welding is completed, a cooling mechanism circulates air around the weld area for cooling, and the weld area's airtightness and solder rigidity are then checked.

[0059] Thus far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present invention.

Claims

1. A tube bundle container frame manufacturing welding device, characterized in that: include: A welding mechanism for welding and fixing metal parts to be welded on a tube bundle container frame, comprising a welding head for converting solid solder into molten solder, a gas storage portion for storing shielding gas, and a plurality of nozzles connected to the gas storage portion for releasing shielding gas into the welding area; a detection mechanism connected to the welding mechanism, for respectively acquiring an air thermal image of the arc distribution space and air flow rates at a plurality of sampling positions above the welding area; A control mechanism, which is respectively connected to the welding mechanism and the detection mechanism, is used to determine the air squeezing area around the welding head according to the air thermal image, determine the pre-injection area of ​​the shielding gas according to the air squeezing area, estimate the air separation direction of the shielding gas according to the relative proportion determined by the width of the shielding gas tip and the length of the straight lines at both ends of the arc corresponding to the angular range of the shielding gas entering the welding area, determine the injection amount and injection speed of the shielding gas according to the air separation direction, and determine the number of nozzle openings according to the number and position of weak areas in the air separation area included in the dispersed air separation direction, wherein, The air separation direction includes a centralized type and a dispersed type.

2. The tube bundle container frame manufacturing and welding device according to claim 1, characterized in that: The detection mechanism includes: Thermocouple array, which collects the temperature at several corresponding heat sampling points to form an air thermal map of the arc distribution space; The ultrasonic wind velocity array is used to obtain the air flow velocity at several locations in the welding area.

3. The tube bundle container frame manufacturing and welding device according to claim 2, characterized in that: The temperatures of all heat sampling points in the arc distribution space are greater than the preset temperature, and the maximum spatial area connected and enclosed by all heat sampling points including the arc space that meet the temperature greater than the preset temperature is determined as the air compression area around the welding head.

4. The tube bundle container frame manufacturing and welding device according to claim 3, characterized in that: The horizontal plane where the metal parts to be welded are located is taken as the first plane, and the horizontal plane where the nozzle with the largest vertical height perpendicular to the plane where the metal parts to be welded are located is taken as the second plane. The area enclosed by the first plane, the second plane and the edge surface of the air extrusion area is determined as the pre-injection area of ​​the shielding gas.

5. The tube bundle container frame manufacturing and welding device according to claim 4, characterized in that: Based on the ultrasonic wind speed array detecting the width of the shielding gas tip within the first preset time when the shielding gas enters the pre-injection area, the relative proportion is the ratio of the width of the shielding gas tip to the length of the straight lines at both ends of the arc corresponding to the angle range of shielding gas entry as the preset relative proportion.

6. The tube bundle container frame manufacturing and welding device according to claim 5, characterized in that: When the relative proportion is greater than or equal to the preset proportion, it is determined that the air separation direction is dispersed; If the air separation direction is dispersed, the weak area whose temperature exceeds the standard temperature of the protective gas by a preset amount and whose residence time around the protective gas is greater than or equal to the preset residence time is divided into the first weak area and the second weak area. The first weak area is above the protective gas tip, and the second weak area is around the protective gas tip except the top.

7. The tube bundle container frame manufacturing and welding device according to claim 6, characterized in that: According to the existence of a first weak area above the tip of the shielding gas, whose direction is opposite to the injection direction of the shielding gas, the injection amount of the shielding gas is increased; if the second weak area exists, the number and position of the second weak sub-areas in the second weak area are obtained, and the corresponding opening number of the nozzle is adjusted according to the number of projection points of the second weak sub-areas on the plane perpendicular to the injection direction, and the injection angle and injection amount of each nozzle are adjusted according to the number of second weak sub-areas closest to the plane perpendicular to the injection direction.

8. The tube bundle container frame manufacturing and welding device according to claim 7, characterized in that: Based on the temperature boundary surface around the protective gas of the second weak area, a plurality of second weak sub-areas are identified, the positions of the plurality of nozzles are adjusted to above each second weak sub-area, and the injection strategy of the nozzles at this time is to adjust the injection amount of the second weak sub-area to the injection amount of the first weak area, wherein, The number of opened nozzles is equal to the sum of the number of first weak areas of the weak area and the number of projection points of the second weak sub-area at different positions on a plane perpendicular to the injection direction.

9. The tube bundle container frame manufacturing and welding device according to claim 8, characterized in that: Based on the relative proportion being less than the preset proportion, it is determined that the air separation direction is concentrated, and a current injection speed value of the shielding gas is obtained, and the injection speed of the shielding gas is increased.

10. The tube bundle container frame manufacturing and welding device according to claim 9, characterized in that: The injection velocity is negatively correlated with the temperature of the gas surrounding the protective gas.

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