Welding fixture for heater, double-sided laser welding mechanism and four-station welding equipment

Abstract

The present application relates to a kind of welding fixture for heater, double-sided laser welding mechanism and four-station welding equipment, welding fixture includes clamping body, first driving mechanism and second driving mechanism, by the first driving mechanism driving two sides side pressure piece cooperation and prevent heater left and right movement, by the second driving mechanism driving top pressure piece and positioning piece cooperation and prevent heater up and down movement, make heater be in vertical posture clamping, positioning accurate, four-station welding equipment and method are manually loaded in loading station, by air knife cleaning heater in cleaning station, by double-sided laser welding mechanism from the welding corresponding hole of heater two sides welding fixture simultaneously welding in welding station, automatically unload in unloading station, overcome the difficulty of automatic double-sided laser welding consistency of ultra-thin heater material, heater deformation is small after welding, welding sealing property and consistency are good, welding stability is high, production efficiency can reach 10 / min, first production yield ≥99%.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automatic laser welding, and particularly relates to a welding fixture for a heater, a double-sided laser welding mechanism and a four-station welding device. BACKGROUND

[0002] A gas water heater burner heats water continuously passing through the coil by the combustion flame of the fire grate heater, and heats the cold water to the required temperature. It is the core component of the combustion chamber. As shown in the figure, two heater components need to be welded and connected by a weld to form a whole. The existing resistance welding process and equipment are generally used to weld the heater. Since the welding part of the heater is an ultra-thin material, the lap joint of spot and seam welding not only increases the weight of the component, but also causes an included angle around the fusion core between the two plates, resulting in low tensile strength and fatigue strength of the joint, affecting the welding sealing performance, and the welding yield of the heater can only be 60-75%. Figure 1 Laser welding is a high-efficiency precision welding method using a high-energy-density laser beam as a heat source. Compared with resistance welding of thin materials, it has the advantages of small product deformation, easy high-speed welding with automation, no back-melting problem, etc., which is beneficial to reduce welding cost, improve welding quality and efficiency. At the same time, the double-sided laser welding process and equipment can avoid the problems of low welding efficiency caused by product turning after single-sided processing and welding yield reduction caused by repositioning error, but since the existing double-sided laser welding equipment generally uses an upper and lower distribution of a galvanometer welding assembly to weld the product placed horizontally, it lacks a clamp and double-sided laser welding mechanism suitable for the heater in a vertical posture, which is not conducive to the automatic feeding and discharging of the heater and other processing, affecting the automation efficiency, and cannot maintain the precision of double-sided laser welding. The uniformity of the heating degree of the product surface, heat affected zone and deformation cannot meet the demand, which cannot overcome the difficulty of laser welding consistency of ultra-thin heater material.

[0003] Secondly, the multi-station laser welding equipment in the prior art includes a rotating worktable, corresponding processing stations and equipment are arranged in sequence along the processing order on the outer side of the rotating worktable in the rotating direction, which can effectively improve the automation degree and production efficiency, but when applied to double-sided laser welding of the heater, the stations cannot be reasonably distributed, which will further reduce the efficiency and increase the manufacturing cost.

[0004] In addition, the welding part of the heater component cannot be fully cleaned, which will further reduce the efficiency, welding quality and welding stability.

[0005] SUMMARY

[0006] ​The present application aims to at least solve one of the above technical problems to some extent, and provides a welding clamp for a heater, a double-sided laser welding mechanism and a four-station welding device, which are accurate in positioning, suitable for automatic laser welding of the heater, small in deformation of the heater after welding, good in welding sealing property and consistency, high in welding stability, efficiency and one-time production yield.

[0007] The present application adopts the technical solution of:

[0008] The welding clamp for the heater comprises a clamping body, a first driving mechanism and a second driving mechanism, the clamping body comprises a positioning piece, a side pressing piece and a top pressing piece, the positioning piece is provided with a notch opening upward, the side pressing piece is located on both sides of the positioning piece, the side pressing piece is provided with a plurality of welding corresponding holes, the first driving mechanism and the second driving mechanism are arranged in the welding corresponding holes, the first driving mechanism is used for driving the side pressing piece to move horizontally and reciprocally, and the second driving mechanism is used for driving the top pressing piece to be arranged in the positioning piece or driving the top pressing piece to ascend and descend above the positioning piece.

[0009] Further, the positioning piece is provided with a positioning hole, the positioning hole is provided with a first core protruding upward, and the notch is located at both ends of the first core and opens to the first core.

[0010] Further, the side pressing piece comprises a first pressing block and a second pressing block distributed upward and downward, the first pressing block is provided with a second core protruding inward, the first driving mechanism comprises a first cylinder, a first finger cylinder and a second cylinder, the first cylinder is used for driving the first finger cylinder to be arranged in the positioning piece or driving the first finger cylinder to move horizontally above the positioning piece, the first finger cylinder is used for driving the first pressing blocks of the side pressing pieces on both sides to gather or move away from each other, and the second cylinder is used for driving the second pressing blocks of the side pressing pieces on both sides to gather or move away from each other.

[0011] Further, the top pressing piece is located at both ends of the positioning piece, and the second driving mechanism comprises two rotary clamping cylinders, and the two rotary clamping cylinders are respectively used for driving the top pressing pieces at both ends to rotate and ascend and descend.

[0012] The double-sided laser welding mechanism for the heater comprises two laser welding assemblies and the welding clamp according to any one of the above, and the two laser welding assemblies are oppositely arranged on both sides of the welding clamp.

[0013] Further, the laser welding assembly comprises a camera, a galvanometer laser assembly and an optical fiber, and the laser welding assembly is connected with an XYZ three-axis module.

[0014] A four-station welding device for a heater comprises a rotating worktable provided with a plurality of welding fixtures as claimed in any one of the preceding claims, and sequentially provided with a feeding station, a cleaning station, a welding station and a discharging station in the rotating direction of the rotating worktable, the cleaning station is provided with a cleaning mechanism, and the welding station is provided with a double-sided laser welding mechanism, the double-sided laser welding mechanism comprises laser welding assemblies located on both sides of the welding fixture.

[0015] Further, the cleaning mechanism comprises air knives and a third driving mechanism, the air knives are located on both sides of the welding fixture, and the air knives are provided with air outlets facing the welding fixture, and the third driving mechanism is used for driving the air knives to ascend and descend.

[0016] Further, the discharging station is provided with a discharging mechanism, the discharging mechanism comprises a discharging fixture, a fourth driving mechanism and a fifth driving mechanism, the fourth driving mechanism is used for driving the discharging fixture to ascend and descend, and the fifth driving mechanism is used for driving the discharging fixture to reciprocate between the discharging station and a discharging port.

[0017] A four-station welding method for a heater based on the four-station welding device for a heater as claimed in the preceding claims, the method comprises the following steps:

[0018] S1, feeding: the rotating worktable drives the empty welding fixture to rotate to the feeding station, and the welding fixture clamps the heater to be welded in the empty welding fixture of the feeding station;

[0019] S2, cleaning: the rotating worktable drives the welding fixture to rotate to the cleaning station, the welding fixture releases the clamping of the heater to be welded, and the cleaning mechanism cleans the heater to be welded, and the welding fixture clamps the heater to be welded after the cleaning;

[0020] S3, welding: the rotating worktable drives the welding fixture to rotate to the welding station, and the double-sided laser welding mechanism aligns the corresponding holes of the heater to be welded to perform double-sided laser welding on the heater to be welded;

[0021] S4, discharging: the rotating worktable drives the welding fixture to rotate to the discharging station, the welding fixture releases the clamping of the welded heater, and the heater is moved out of the welding fixture;

[0022] The steps S1-S4 are repeatedly performed.

[0023] Compared with the prior art, the present application has the following beneficial effects:

[0024] (1) The welding fixture is driven by the first driving mechanism to press the side clamping parts on both sides to prevent the heater from moving left and right. The second driving mechanism drives the top clamping part to descend above the positioning part. The top clamping part and the positioning part cooperate to prevent the heater from moving up and down, thereby improving the positioning accuracy of clamping the heater. At the same time, the heater is in a vertical position, and welding can be performed at the corresponding welding hole to maintain the accuracy of double-sided laser welding. This ensures that the uniformity of the product surface heating, heat-affected zone and deformation can meet the requirements, thereby overcoming the difficulty of consistent laser welding of ultra-thin heater materials. When the clamp is released, the heater to be welded can be placed from above the positioning part or the welded heater can be taken out, which is conducive to the automated loading and unloading of the heater and other processing, thereby improving the processing efficiency.

[0025] (2) The double-sided laser welding mechanism uses two laser welding components to perform double-sided laser welding simultaneously from the welding corresponding holes of the welding fixtures on both sides of the heater. This changes the welding method, making the product surface more uniformly heated. Heat-affected zones and deformation problems can be effectively alleviated. The product deformation is small, the welding stability is high, the welding yield is high, and the efficiency is doubled.

[0026] (3) Four-station welding equipment and method: manual feeding at the feeding station, cleaning of the heater at the cleaning station, double-sided laser automatic welding at the welding station, and automatic unloading at the unloading station are all completed in a fully automated welding production process. It has advanced integration and reasonable allocation of four stations to improve the efficiency of automated production. The thorough cleaning by air knife will further improve efficiency, welding quality and welding stability. The production efficiency can reach 10 pieces / min and the yield rate of one production run is ≥99%. Attached Figure Description

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0028] Figure 1 It is a 3D view of the heater before and after welding;

[0029] Figure 2 This is a perspective view of Example 1 before clamping;

[0030] Figure 3 This is a three-dimensional image after the blessing of Example 1;

[0031] Figure 4 This is an exploded view of Example 1;

[0032] Figure 5 This is a front view of Example 1;

[0033] Figure 6 yes Figure 5 A sectional view along the AA direction;

[0034] Figure 7 is a perspective view of example 2;

[0035] Figure 8 is a perspective view of example 3;

[0036] Figure 9 is a perspective view of the cleaning mechanism of example 3;

[0037] Figure 10 is a perspective view of the blanking mechanism of example 3.

[0038] Figure 11 is a perspective view of the rotary worktable of example 3.

[0039] Marked in the figure: heater to be welded 1, welded heater 2;

[0040] welding fixture 3; fixture body 31; positioning piece 311, notch 3111, positioning hole 3112, limiting hole 3113; side pressing piece 312, first pressing block 3121, second pressing block 3122, second core 3123, welding corresponding hole 3124; top pressing piece 313; first core 314, support piece 3141, support cap 3142, support rib 3143; limiting block 315; first driving mechanism 32, first air cylinder 321, first finger air cylinder 322, second air cylinder 323; second driving mechanism 33, rotary clamping air cylinder 331;

[0041] double-sided laser welding mechanism 4; laser welding assembly 41, camera 411, galvanometer laser assembly 412, optical fiber 413; XYZ three-axis module 42, X-axis module 421, Y-axis module 422, Z-axis module 423;

[0042] rotary worktable 5, turntable 501, cam divider 502;

[0043] cleaning mechanism 6; air knife 61, air outlet 611; third driving mechanism 62, first guide plate 621, third air cylinder 622, first carrier plate 623, adjusting rod 624, first guide shaft 625, clamp connector 626;

[0044] blanking mechanism 7; blanking fixture 71; fourth driving mechanism 72, second guide plate 721, fourth air cylinder 722, second carrier plate 723, second guide shaft 724; fifth driving mechanism 73; blanking port 74; blanking chute 75.

[0045] feeding station 8, cleaning station 9, welding station 10, blanking station 11. DETAILED DESCRIPTION

[0046] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0047] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0048] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0049] Example 1:

[0050] like Figures 2-6 As shown, this is a preferred embodiment of a welding fixture for a heater according to the present invention. The welding fixture 3 includes a fixture body 31, a first driving mechanism 32, and a second driving mechanism 33. The fixture body 31 includes a positioning member 311, a side clamping member 312, and a top clamping member 313. The positioning member 311 has an upwardly opening notch 3111. The side clamping member 312 is located on both sides of the positioning member 311 and has a plurality of welding corresponding holes 3124. The first driving mechanism 32 and the second driving mechanism 33 make way for the welding corresponding holes 3124. The first driving mechanism 32 is used to drive the side clamping member 312 to move horizontally back and forth. The second driving mechanism 33 is used to drive the top clamping member 313 to make way for the positioning member 311 or to drive the top clamping member 313 to rise and fall above the positioning member 311.

[0051] As Figure 4 shown, further, the positioning member 311 is provided with a positioning hole 3112, the first core 314 is upwardly protruding in the positioning hole 3112, the notches 3111 are located at both ends of the first core 314 and open to the first core 314, the first core 314 is embedded in the positioning hole 3112 at the bottom to facilitate quick disassembly, and the two pieces of the to-be-welded heater can be positioned and inserted into the notches 3111 after being closed as a whole, the upwardly protruding first core 314 is positioned and inserted into the inside of the to-be-welded heater, and the positioning and clamping accuracy of the heater is further improved.

[0052] Further, the first core 314 includes a support member 3141 and a support cap 3142, the support member 3141 cooperates with the positioning hole 3112, and the support cap 3142 is sleeved on the top of the support member 3141, the support cap 3142 is provided with a plurality of spaced support ribs 3143, the support ribs 3143 cooperate with the protrusions on the inside of the heater, the support ribs 3143 can be replaced, the support reliability is further improved by cooperating the support ribs 3143 with the protrusions, the accuracy is improved, and the deformation amount is reduced.

[0053] Further, the side pressing member 312 includes a first pressing block 3121, the first pressing block 3121 is provided with a second core 3123 protruding inwardly, the first driving mechanism 32 includes a first cylinder 321 and a first finger cylinder 322, the first cylinder 321 is used to drive the first finger cylinder 322 to be out of the way of the positioning member 311 or to drive the first finger cylinder 322 to move horizontally above the positioning member 311, and the first finger cylinder 322 is used to drive the first pressing blocks 3121 of the two side pressing members 312 to be close together or to be away from each other.

[0054] The first cylinder 321 is located at the side of the clamping body 31, the first finger cylinder 322 is driven to be out of the way of the positioning member 311 by the contraction of the cylinder rod of the first cylinder 321, the heater can be easily put in or taken out above the positioning member 311, the first finger cylinder 322 is moved to above the positioning member 311 by the elongation of the cylinder rod of the first cylinder 321, the two finger parts of the first finger cylinder 322 are connected with the first pressing blocks 3121 on both sides respectively, and then the first pressing blocks 3121 on both sides of the positioning member 311 can be driven to be close together or to be away from each other by the finger part of the first finger cylinder 322 being clamped or relaxed, the second core 3123 protruding outwardly can cooperate with the heater when clamped, and the positioning accuracy is further improved.

[0055] Further, the side pressing part 312 comprises a second pressing block 3122, the first pressing block 3121 and the second pressing block 3122 are distributed up and down, the first driving mechanism 32 comprises a second cylinder 323, the second cylinder 323 is used for driving the second pressing block 3122 of the two side pressing parts 312 to gather or move away, the second cylinder 323 is two and is respectively located below the two sides of the clamping body 31, the corresponding second pressing block 3122 is driven to move horizontally reciprocatingly through the extension and contraction of the cylinder rod of the second cylinder 323, the two second cylinders 323 are synchronously extended to drive the two second pressing blocks 3122 to gather, the two second cylinders 323 are synchronously contracted to drive the two second pressing blocks 3122 to move away, not only to give way to the welding corresponding hole 3124, and when the welding corresponding hole 3124 has a larger span, compared with only using the first cylinder 321 and the first finger cylinder 322, or only using the second cylinder 323, the pressing of the heater can be further improved by the combined use of the first pressing block 3121 and the second pressing block 3122, further improving the positioning accuracy and the pressing force.

[0056] Further, the clamping body 31 is provided with a limiting opening 3113, the limiting opening 3113 is provided with a limiting block 315, the second pressing block 3122 is arranged in the limiting opening 3113, the second pressing block 3122 can be limitedly matched with the inner side of the limiting opening 3113 when gathering, and the second pressing block 3122 can be matched with the limiting block 315 when moving away, thereby limiting the movement stroke of the second pressing block 3122, further improving the operation reliability, and avoiding that the convex part of the side of the heater is excessively pressed to cause the deformation of the heater.

[0057] Further, the first pressing block 3121 and the second pressing block 3122 are both made of copper material, and a plurality of welding corresponding holes 3124 are distributed on the first pressing block 3121 and the second pressing block 3122, which is beneficial to improving the heat dissipation while pressing.

[0058] Further, the top pressing part 313 is located at both ends of the positioning part 311, the second driving mechanism 33 comprises two rotary clamping cylinders 331, the two rotary clamping cylinders 331 are respectively used for driving the rotary lifting of the two end top pressing parts 313, the rotary lifting of the cylinder rod of the rotary clamping cylinder 331 can drive the top pressing part 313 to give way to the positioning part 311, so as to put or take out the heater from above the positioning part 311, the rotary lowering of the cylinder rod of the rotary clamping cylinder 331 can drive the top pressing part 313 to rotate above the positioning part 311 and lower to press the heater, preventing the upward and downward displacement of the heater, further improving the positioning accuracy of clamping the heater.

[0059] The working principle of the above-mentioned welding fixture for the heater is as follows:

[0060] As Figure 2As shown, in the initial state, the two rotary clamping cylinders 331 drive the top pressing part 313 and the positioning part 311 to let go, the first cylinder 321 of the first driving mechanism 32 drives the first finger cylinder 322 and the positioning part 311 to let go, the second cylinder 323 drives the two second pressing blocks 3122 on both sides to separate and cooperate with the limiting block 315, and after the two pieces of the to-be-welded heater are closed into a whole, the heater is inserted into the notch 3111 above the positioning part 311, and the bottom of the heater is clamped outside the protruding first core 314.

[0061] As shown in FIG. 4, Figure 3 As shown in FIG. 5, the first cylinder 321 drives the first finger cylinder 322 to move to the middle part above the positioning part 311, the first finger cylinder 322 drives the two first pressing blocks 3121 on both sides to gather, the first core 314 is clamped outside the heater, the two second cylinders 323 drive the two second pressing blocks 3122 on both sides to gather and cooperate with the inside of the limiting port 3113, the second pressing blocks 3122 contact and press the outside of the heater, the two side pressing parts 312 on both sides cooperate and press to prevent the heater from moving left and right, the two rotary clamping cylinders 331 drive the top pressing part 313 to rotate and descend, the top pressing part 313 presses above the heater, the top pressing part 313 cooperates with the positioning part 311 to prevent the heater from moving up and down, and the clamping of the heater is realized.

[0062] The first finger cylinder 322 can drive the two first pressing blocks 3121 on both sides to move away, the second cylinder 323 drives the two second pressing blocks 3122 on both sides to move away, and the rotary clamping cylinder 331 drives the top pressing part 313 to rotate and ascend, so as to release the clamping of the heater. When the first cylinder 321 drives the first finger cylinder 322 to move reversely to let go with the positioning part 311, the welded heater can be taken out from the positioning part 311 above the positioning part 311, and the initial state is restored, so as to process again.

[0063] Before and after clamping, the heater is in a vertical posture, which is beneficial to the automatic feeding and discharging of the heater and other processing; after clamping, the heater is in a vertical posture and is accurately positioned, the first driving mechanism 32 and the second driving mechanism 33 are let go with the welding corresponding hole 3124, welding corresponding to the welding track can be performed at the welding corresponding hole 3124, the double-sided laser welding precision is maintained, the uniformity of the heating degree of the product surface, the heat affected zone and the deformation can meet the demand, and the difficulty of the laser welding consistency of the ultra-thin heater material is overcome.

[0064] Embodiment 2:

[0065] As shown in FIG. 6, Figure 7As shown, it is a preferred embodiment of the double-sided laser welding mechanism for a heater according to the present application, the double-sided laser welding mechanism 4 comprises two laser welding assemblies 41 and the welding fixture 3 as described in Embodiment 1, and the two laser welding assemblies 41 are oppositely arranged on both sides of the welding fixture 3.

[0066] Further, the laser welding assembly 41 comprises a camera 411, a galvanometer laser assembly 412, and an optical fiber 413, the camera 411 is used for photographing and monitoring the galvanometer laser assembly 412, and the high-energy laser beam enters the optical fiber 413 and is emitted by the galvanometer laser assembly 412 to complete laser welding, which can further improve the welding efficiency and the weld quality.

[0067] Further, the laser welding assembly 41 is connected with an XYZ three-axis module 42, and the XYZ three-axis module 42 drives the laser welding assembly 41 to move so as to perform automatic welding on the heater according to the welding track.

[0068] Further, the XYZ three-axis module 42 comprises an X-axis module 421, a Y-axis module 422, and a Z-axis module 423 which are perpendicular to each other, the mounting plate of the X-axis module 421 is connected with the Z-axis module 423, the mounting plate of the Y-axis module 422 is connected with the X-axis module 421, and the mounting plate of the Z-axis module 423 is connected with the laser welding assembly 41, and then the mounting plate of the X-axis module 421 drives the Z-axis module 423 to move by reciprocating sliding left and right along the X-axis module 421, the mounting plate of the Y-axis module 422 drives the X-axis module 421 to move by reciprocating sliding forward and backward along the Y-axis module 422, and the mounting plate of the Z-axis module 423 drives the laser welding assembly 41 to move by reciprocating sliding up and down along the Z-axis module 423, thereby realizing the movement of the laser welding assembly 41 in the three-dimensional space.

[0069] The working principle of the above-mentioned double-sided laser welding mechanism 4 is as follows:

[0070] When the welding fixture 3 clamping the heater to be welded is located between the two laser welding assemblies 41, the XYZ three-axis module drives the laser welding assembly 41 to move to the photographing position of the heater, the camera 411 moves to the welding position of the heater after photographing, and the galvanometer laser assemblies 412 of the two laser welding assemblies 41 perform double-sided simultaneous laser welding according to the welding track from the welding corresponding holes 3124 on both sides of the heater, the heating degree of the product surface is more uniform, the heat-affected and deformation problems can be effectively alleviated, and the efficiency is also doubled.

[0071] Embodiment 3:

[0072] As Figures 8-11As shown, it is a preferred embodiment of the four-station welding equipment for a heater according to the present application, which comprises a rotating worktable 5 provided with a plurality of welding fixtures 3 as described in Embodiment 1, and sequentially provided with a feeding station 8, a cleaning station 9, a welding station 10 and a discharging station 11 around the rotating direction of the rotating worktable 5, wherein the cleaning station 9 is provided with a cleaning mechanism 6, and the welding station 10 is provided with a double-sided laser welding mechanism 4 comprising laser welding assemblies 41 as described in Embodiment 2 located on both sides of the welding fixture 3.

[0073] The four-station welding equipment for a heater has the advantages of high integration, high efficiency by reasonable distribution of four stations, and stability of welding products by solving the problem of resistance welding fluctuation affecting the stability of the welding products by using double-galvanometer laser welding, thereby increasing the yield of products and improving the production efficiency.

[0074] Further, the welding fixture 3 is preferably four and is arranged at intervals around the rotating worktable 5, and the tail portions of adjacent welding fixtures 3 are matched and perpendicular to each other, the standardized welding fixture 3 is convenient for material preparation and replacement, and the replacement is also simple, only 4 sets of the same welding fixture 3 need to be replaced, thereby reducing the manufacturing cost, and meanwhile, the four welding fixtures 3 can correspond to four stations respectively, thereby facilitating continuous and sequential processing and improving the production rhythm and efficiency.

[0075] As shown in Embodiment 1, Figure 9 Further, the cleaning mechanism 6 comprises an air knife 61 and a third driving mechanism 62, the air knife 61 is located on both sides of the welding fixture 3, the air knife 61 is provided with an air outlet 611 facing the welding fixture 3, and the third driving mechanism 62 is used for driving the air knife 61 to ascend and descend, the high-speed air knife 61 is used for cleaning the product, thereby improving the welding quality and welding stability.

[0076] Further, the third driving mechanism 62 comprises a first guide plate 621, a third cylinder 622, a first carrier plate 623 and an adjusting rod 624, the third cylinder 622 is mounted on the first guide plate 621, the cylinder rod of the third cylinder 622 penetrates through the first guide plate 621 and is connected with the first carrier plate 623, the first carrier plate 623 is provided with a plurality of first guide shafts 625 penetrating through the first guide plate 621, the adjusting rod 624 is connected with the first carrier plate 623 and the air knife 61, the first carrier plate 623 is driven to ascend and descend by the cylinder rod of the third cylinder 622, and the first carrier plate 623 stably ascends and descends under the sliding cooperation of the first guide shafts 625 and the first guide plate 621, thereby driving the air knife 61 to ascend and descend through the adjusting rod 624.

[0077] The working principle of the cleaning mechanism 6 is that when descending, the air knife 61 is located on both sides of the welding clamp 3, the welding clamp 3 releases the clamping of the heater, and the dirt on the heater can be blown away through the air outlet 611 of the air knife 61 to clean the heater by blowing. When rising, the air knife 61 is located above the welding clamp 3, which can give way to the welding clamp 3, so that the welding clamp 3 can move between different stations with the rotating workbench 5.

[0078] Further, the air knife 61 has a plurality of air knives 61, and each air knife 61 is provided with a clamp connecting piece 626 matched with the adjusting rod 624. By adjusting the installation height or angle of the clamp connecting piece 626 on the adjusting rod 624, the adjustable installation of the air knife 61 is realized, which is convenient for flexible application.

[0079] As shown in Figure 10 Further, the blanking station 11 is provided with a blanking mechanism 7, and the blanking mechanism 7 comprises a blanking clamp 71, a fourth driving mechanism 72, a fifth driving mechanism 73 and a blanking port 74. The fourth driving mechanism 72 is used to drive the blanking clamp 71 to ascend and descend, and the fifth driving mechanism 73 is used to drive the blanking clamp 71 to reciprocate between the blanking station 11 and the blanking port 74.

[0080] Further, the blanking clamp 71 comprises a second finger air cylinder, which clamps the heater by converging the finger parts, and releases the clamping by opening the finger parts.

[0081] Further, the fourth driving mechanism 72 comprises a second guide plate 721, a fourth air cylinder 722 and a second carrier plate 723. The fourth air cylinder 722 is installed on the second guide plate 721, the cylinder rod of the fourth air cylinder 722 penetrates through the second guide plate 721 and is connected with the second carrier plate 723. The second carrier plate 723 is provided with a plurality of second guide shafts 724 penetrating through the second guide plate 721. The blanking clamp 71 is installed on the second carrier plate 723. The second carrier plate 723 is driven to descend or ascend by the cylinder rod of the fourth air cylinder 722, and is stably lowered or raised under the sliding cooperation of the second guide shafts 724 and the second guide plate 721, and then the blanking clamp 71 is lowered or raised.

[0082] Further, the fifth driving mechanism 73 comprises a rodless cylinder, and the second guide plate 721 is connected with the slider of the rodless cylinder. The second guide plate 721 is driven by the slider of the rodless cylinder, and then the blanking clamp 71 is driven to reciprocate with the fourth driving mechanism 72 as a whole along the rodless cylinder, so as to realize the reciprocating movement between the blanking station 11 and the blanking port 74.

[0083] Further, the blanking port 74 is provided with a blanking chute 75, so that the welded heater can slide along the blanking chute 75 to the blanking port 74, reducing the impact damage.

[0084] The working principle of the blanking mechanism 7 is as follows: when the welding fixture 3 moves to the blanking station 11, the welding fixture 3 releases the clamping of the welded heater, the fifth driving mechanism 73 drives the second finger cylinder to move above the welding fixture 3, the fourth cylinder 722 drives the second finger cylinder to descend, the second finger cylinder clamps the welded heater from both sides of the heater, the fourth cylinder 722 drives the second finger cylinder to ascend, the clamped heater is taken out of the welding fixture 3, the second finger cylinder is driven by the fifth driving mechanism 73 to move to the blanking chute 75, the second finger cylinder is opened to release the clamping of the heater, the heater slides along the blanking chute 75 to the blanking port 74, and one time of blanking is completed, the fifth driving mechanism 73 is reset to automatically blank again, and the welded heaters are collected from the blanking port 74.

[0085] As shown in Figure 11 Further, the rotating workbench 5 includes a rotating disc 501 and a cam divider 502 for driving the rotating disc 501 to rotate, and the second cylinder 323 can be installed at the bottom of the rotating disc 501, so as to further ensure high-precision rotation.

[0086] Further, a controller is included, which is electrically connected with the rotating workbench 5, the welding fixture 3, the cleaning mechanism 6, the double-sided laser welding mechanism 4 and the blanking mechanism 7, and is used for feeding back the station where the welding fixture 3 is located through the rotating workbench 5, so as to coordinate the cleaning mechanism 6, the double-sided laser welding mechanism 4 and the blanking mechanism 7 to continuously and automatically work.

[0087] Embodiment 4:

[0088] For a preferred embodiment of the four-station welding method for a heater, the welding method is based on the four-station welding equipment for a heater as described in Embodiment 3, and the method includes the following steps:

[0089] S1, feeding: the rotating workbench 5 drives the empty welding fixture 3 to rotate to the feeding station 8, and the heater to be welded is fed into the empty welding fixture 3 of the feeding station 8, and the welding fixture 3 clamps the heater to be welded, specifically:

[0090] After the two heater components are closed by a worker, the heater is prevented from moving left and right by the first driving mechanism 32 cooperating with the side pressing members 312 on both sides to press tightly in the positioning member 311, and the second driving mechanism 33 drives the top pressing member 313 to descend above the positioning member 311 to prevent the heater from moving up and down, and the heater to be welded is automatically clamped.

[0091] S2, cleaning: the rotary workbench 5 drives the welding fixture 3 to rotate to the cleaning station 9, the welding fixture 3 releases the clamping of the heater to be welded, and the cleaning mechanism 6 cleans the heater to be welded, and after cleaning, the welding fixture 3 clamps the heater to be welded, specifically:

[0092] The rotary workbench 5 drives the welding fixture 3 carrying the heater to be welded after step S1 feeding, rotates from the feeding station 8 to the cleaning station 9, is driven to release clamping by the first driving mechanism 32 and the second driving mechanism 33, the third driving mechanism 62 drives the air knife 61 to descend to both sides of the heater to be welded, and the air knife 61 blows out high-speed airflow from the air outlet 611 to clean the heater to be welded, and after cleaning, the first driving mechanism 32 and the second driving mechanism 33 are driven to clamp again, and the third driving mechanism 62 drives the air knife 61 to rise to above the welding fixture 3, so that the welding fixture 3 moves.

[0093] S3, welding: the rotary workbench 5 drives the welding fixture 3 to rotate to the welding station 10, and the double-sided laser welding mechanism 4 aligns the welding corresponding hole 3124 to weld the heater to be welded, specifically:

[0094] The rotary workbench 5 drives the welding fixture 3 carrying the heater to be welded after step S2 cleaning, rotates from the cleaning station 9 to the welding station 10, and the XYZ three-dimensional module drives the laser welding assembly 41 to move, and the galvanometer laser assembly 412 of the two laser welding assemblies 41 performs double-sided simultaneous laser welding from the welding corresponding hole 3124 on both sides of the heater according to the welding trajectory, and after welding, the XYZ three-dimensional module drives the laser welding assembly 41 to move to the rotation position of the double-sided laser welding mechanism 4 and the welding fixture 3.

[0095] S4, discharging: the rotary workbench 5 drives the welding fixture 3 to rotate to the discharging station 11, and the welding fixture 3 releases the clamping of the welded heater, and moves the heater out of the welding fixture 3, specifically:

[0096] The rotary table 5 drives the welding fixture 3 carrying the post-welding heater to rotate to the unloading station 11 from the welding station 10, the fourth driving mechanism 72 drives the unloading fixture 71 to ascend, the fifth driving mechanism 73 drives the unloading fixture 71 to move above the welding fixture 3 in the unloading station 11, the welding fixture 3 releases the clamping of the post-welding heater, the fourth driving mechanism 72 drives the unloading fixture 71 to descend, the unloading fixture 71 clamps the post-welding heater, the fourth driving mechanism 72 drives the unloading fixture 71 to ascend, the heater is taken out from the welding fixture 3, the fifth driving mechanism 73 drives the unloading fixture 71 clamping the heater to move to the unloading port 74, the unloading fixture 71 releases the clamping of the post-welding heater, the post-welding heater falls in the unloading port 74, the post-welding heater is collected, and the welding fixture 3 is in an empty state, the rotary table 5 rotates to rotate the empty welding fixture 3 from the unloading station 11 to the feeding station 8, and steps S1-S4 are repeated cyclically, so that continuous automatic processing can be performed.

[0097] The four-station welding method and device are characterized in that the heater is manually fed in the feeding station 8, the heater is cleaned in the cleaning station 9, the heater is automatically welded by double-sided laser in the welding station 10, and the post-welding heater is automatically unloaded in the unloading station 11, full-automatic welding production is completed, the automatic production efficiency is high, can reach 10 / min, the positioning accuracy is high, can reach one-time production yield ≥99%, the welding sealing performance is good, the laser inert gas welding is adopted, the product deformation is small, the welding stability is high, the welding yield is high, the welding mode is changed, the difficulties of laser welding of the heater are overcome, and the production cost can be effectively reduced.

[0098] The above series of detailed descriptions are only specific descriptions of feasible embodiments of the present application, and are not used to limit the protection scope of the present application. Equivalent embodiments or changes made without departing from the spirit of the present application should be included in the protection scope of the present application.

Claims

1. A welding fixture for a heater, characterized in that, The device includes a clamping body (31), a first driving mechanism (32), and a second driving mechanism (33). The clamping body (31) includes a positioning member (311), a side clamping member (312), and a top clamping member (313). The positioning member (311) has an upward-opening notch (3111) and a positioning hole (3112). The positioning hole (3112) has an upward-protruding first core (314) inside. The notch (3111) is located at both ends of the first core (314) and opens into the first core (314). The side clamping member (312) is located on both sides of the positioning member (311). The side clamping member (312) is provided with a plurality of welding corresponding holes (3124). The side clamping member (312) includes a first clamping block (3121) and a second clamping block (3122) distributed vertically. The first clamping block (3121) is provided with a second core (3123) protruding inward. The first driving mechanism (32) and the second driving mechanism (33) make way for the welding corresponding holes (3124). The first driving mechanism (32) is used to drive the side clamping member (312) to move horizontally back and forth. The first driving mechanism (32) includes a first cylinder (321), a first finger cylinder (322), and a second finger cylinder (323). Two cylinders (323), the first cylinder (321) is used to drive the first finger cylinder (322) to move away from the positioning member (311) or drive the first finger cylinder (322) to move horizontally above the positioning member (311), the first finger cylinder (322) is used to drive the first pressing block (3121) of the two side pressing members (312) to move closer or further away, the second cylinder (323) is used to drive the second pressing block (3122) of the two side pressing members (312) to move closer or further away; the second driving mechanism (33) is used to drive the top pressing member (313) to move away from the positioning member (311) or drive the top pressing member (313) to rise and fall above the positioning member (311).

2. The welding fixture for a heater according to claim 1, characterized in that, The top clamping member (313) is located at both ends of the positioning member (311). The second driving mechanism (33) includes two rotary clamping cylinders (331), which are used to drive the top clamping members (313) at both ends to rotate and lift.

3. A double-sided laser welding mechanism for a heater, characterized in that, It includes two laser welding components (41) and a welding fixture (3) as described in any one of claims 1 to 2, wherein the two laser welding components (41) are arranged opposite each other on both sides of the welding fixture (3).

4. The double-sided laser welding mechanism for a heater according to claim 3, characterized in that, The laser welding assembly (41) includes a camera (411), a galvanometer laser assembly (412), and an optical fiber (413). The laser welding assembly (41) is connected to an XYZ three-axis module (42).

5. A four-station welding device for heaters, characterized in that, The device includes a rotary worktable (5), which is provided with a plurality of welding fixtures (3) as described in any one of claims 1 to 2. A loading station (8), a cleaning station (9), a welding station (10) and a unloading station (11) are arranged in sequence around the rotation direction of the rotary worktable (5). The cleaning station (9) is provided with a cleaning mechanism (6). The welding station (10) is provided with a double-sided laser welding mechanism (4). The double-sided laser welding mechanism (4) includes laser welding components (41) located on both sides of the welding fixtures (3).

6. A four-station welding device for heaters according to claim 5, characterized in that, The cleaning mechanism (6) includes an air knife (61) and a third drive mechanism (62). The air knife (61) is located on both sides of the welding fixture (3). The air knife (61) has an air outlet (611) facing the welding fixture (3). The third drive mechanism (62) is used to drive the air knife (61) to rise and fall.

7. A four-station welding device for heaters according to claim 5, characterized in that, The unloading station (11) is provided with an unloading mechanism (7), which includes an unloading clamp (71), a fourth drive mechanism (72), a fifth drive mechanism (73), and an unloading port (74). The fourth drive mechanism (72) is used to drive the unloading clamp (71) to rise and fall, and the fifth drive mechanism (73) is used to drive the unloading clamp (71) to move back and forth between the unloading station (11) and the unloading port (74).

8. A four-station welding method for a heater, characterized in that, The method based on the four-station welding equipment for heaters as described in claim 5 includes: S1, Loading: The rotating worktable (5) drives the empty welding fixture (3) to rotate to the loading station (8), and loads the heater to be welded into the empty welding fixture (3) of the loading station (8). The welding fixture (3) holds the heater to be welded. S2, Cleaning: The rotating worktable (5) drives the welding fixture (3) to rotate to the cleaning station (9). The welding fixture (3) releases the clamp on the heater to be welded, and the cleaning mechanism (6) cleans the heater to be welded. After cleaning, the welding fixture (3) clamps the heater to be welded. S3, Welding: The rotating worktable (5) drives the welding fixture (3) to rotate to the welding station (10), and the double-sided laser welding mechanism (4) aligns with the corresponding welding hole (3124) to perform double-sided laser welding on the heater to be welded; S4. Unloading: The rotating worktable (5) drives the welding fixture (3) to rotate to the unloading station (11). The welding fixture (3) releases the clamp on the welded heater and moves the heater out of the welding fixture (3). Repeat steps S1-S4 in a loop.

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