Spot welding auxiliary clamp for heat exchanger

Abstract

The utility model relates to the technical field of spot welding processing, in particular to a heat exchanger spot welding auxiliary clamp which comprises a main plate, a plurality of side plates and a spot welding plate, the side plates and the spot welding plate are correspondingly arranged, the main plate is arranged in the length direction of a heat exchanger body, the side plates are perpendicular to the main plate and arranged on the side face of the heat exchanger body, and the spot welding plate is perpendicular to the side plates and abuts against the side plates. The side plates are movably connected with the main plate through first adjusting assemblies, the spot welding plate is movably connected with the side plates through second adjusting assemblies, the first adjusting assemblies and the second adjusting assemblies are first threaded rods and second threaded rods correspondingly, and hand wheels are fixedly arranged at the ends of the first threaded rods and the ends of the second threaded rods correspondingly. The side plate and the spot welding plate are connected with the first screw rod and the second screw rod through sliding blocks correspondingly. The spot welding auxiliary clamp for the heat exchanger is arranged outside the main body of the heat exchanger, all the welding spots to be subjected to spot welding are marked through the pre-formed welding holes, and spot welding operation in the later period is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of spot welding processing, in particular to a spot welding auxiliary fixture for a heat exchanger. Background Art

[0002] A heat exchanger is a common heat exchange device, which is widely used in industrial production and daily life. Its main function is to achieve heat transfer between different media to achieve energy conservation and improve efficiency. A heat exchanger is usually composed of multiple stacked plates, and these plates are connected into a whole through a copper foil welding process. Before the copper foil heating process, it is necessary to perform spot welding pre-positioning on the stacked plates to ensure the welding effect in the later stage.

[0003] After retrieval, the patent with the publication number of CN221019081U discloses an ultrasonic synchronous assisted resistance spot welding device, which can be applied to heat exchanger plates for spot welding of heat exchanger plates, improve the welding efficiency, and the up-and-down synchronous spot welding can evenly distribute the welding stress, avoiding the problems of thermal deformation and stress concentration caused by unilateral welding, thereby improving the mechanical strength and durability of the welding part and ensuring the stability and safety of the heat exchanger during use. However, since the above device usually relies on manual operation when spot welding heat exchanger plates, inaccurate positioning often leads to position deviation of the solder joints during the manual operation process, thereby affecting the overall performance and service life of the heat exchanger. Summary of the Utility Model

[0004] In order to solve the problem of poor accuracy of existing manual spot welding, the utility model provides a spot welding auxiliary fixture for a heat exchanger. The auxiliary fixture is clamped outside the semi-finished heat exchanger, and the positioning holes pre-opened on the auxiliary fixture are used to show the positions of the solder joints, so as to facilitate accurate spot welding operations.

[0005] The utility model provides a spot welding auxiliary fixture for a heat exchanger. The heat exchanger includes a heat exchanger main body, side plates and nozzles. Side plates are arranged on both the upper and lower sides of the heat exchanger main body, and nozzles are arranged at the four corners of the heat exchanger main body. The synchronous spot welding auxiliary fixture includes a main board, a plurality of correspondingly arranged side plates and spot welding plates. The main board is arranged along the length direction of the heat exchanger main body, the side plates are vertically arranged on the main board on the side of the heat exchanger main body, and the spot welding plates are vertically arranged against the side plates and abutted against the side plates. A plurality of side plates are movably connected to the main board through a first adjusting component, and the spot welding plates are movably connected to the side plates through a second adjusting component. The side plates and the spot welding plates form a set of spot welding units. The positions of the spot welding units are adjusted through the adjusting components on the main board to mark the positions of the solder joints, which is convenient for spot welding operations.

[0006] Further, the first adjusting component and the second adjusting component are respectively a first screw rod and a second screw rod. Handwheels are fixedly arranged at the ends of the first screw rod and the second screw rod. The side plate and the spot welding plate are respectively connected to the first screw rod and the second screw rod through sliders. By driving the screw rod to rotate with the handwheel, the slider screwed thereto is driven to move during the rotation process, that is, the positions of the side plate or the spot welding plate are adjusted.

[0007] Further, the first screw rod and the second screw rod are differential screw rods with symmetric threads at both ends. There are three groups of side plates and spot welding plates correspondingly arranged. The side plate placed in the middle of the heat exchanger body is fixedly connected to the main board. The spot welding unit in the middle of the heat exchanger body is fixed, and the spot welding units arranged on both sides move synchronously to both sides or synchronously to the middle under the drive of the differential screw rod.

[0008] Further, the spot welding plate is divided into an upper welding plate group and a lower welding plate group. The upper welding plate group and the lower welding plate group are respectively arranged at both ends of the second screw rod through sliders and abut against the side plates on the upper and lower sides. The second screw rod drives the upper welding plate group and the lower welding plate group to respectively abut against the upper and lower side plates of the heat exchanger body, and the position of the fixture is fixed.

[0009] Further, welding blocks are arranged on the spot welding plate. Welding holes are opened on the welding blocks. Three welding blocks are arranged on each spot welding plate. A third screw rod for connecting the welding blocks is also arranged on the spot welding plate. The positions of the welding points are marked by opening the welding holes.

[0010] Further, the welding blocks are connected to the third screw rod through sliders. The sliders and the welding blocks are of an integral structure. The welding blocks placed in the middle of the spot welding plate are fixedly connected to the spot welding plate. By adjusting the positions of the welding blocks at both ends of the spot welding plate through the third screw rod, the distance between the welding points is adjusted.

[0011] Further, a pipe connection positioning member is further included. The pipe connection positioning member is fixedly connected to the spot welding plate close to the pipe through a cross bar. The cross bar is vertically arranged in the middle of the spot welding plate. The positions of the spot welding plates at both ends of the heat exchanger can be adjusted through the pipe connection positioning member.

[0012] Further, the pipe connection positioning member includes a sliding sleeve, a connecting rod and a top plate. The sliding sleeve is movably sleeved on the cross bar. The top plates are arranged at both ends of the sliding sleeve through the connecting rod. The top plates are clamped on the opposite surfaces of the pipe. The pipe connection positioning member is stably clamped between the two pipes through the top plates at both ends to adjust the distance between the side spot welding plate and the pipe.

[0013] Further, the top plate is in a V shape. The connecting rod includes a fixed rod, a movable rod and a spring. The movable rod is slidably arranged in the fixed rod through the spring. Through the cooperation of the V-shaped top plate and the spring, the cross plate is automatically positioned between the two pipes.

[0014] Further, a locking screw is also provided on the sliding sleeve. The locking screw is threadedly connected to the sliding sleeve and can abut against the cross bar, and a scale is provided on the cross bar. The position of the sliding sleeve on the cross bar is fixed by the locking screw.

[0015] The beneficial effects of the present utility model are as follows:

[0016] (1) The present utility model provides a spot welding auxiliary fixture for a heat exchanger. By arranging the auxiliary fixture outside the heat exchanger main body and using the pre-opened welding holes of the auxiliary fixture to mark each welding point to be spot welded, it is convenient for subsequent spot welding operations.

[0017] (2) The present utility model provides a spot welding auxiliary fixture for a heat exchanger. By adjusting the spacing of several spot welding plates through the first screw rod, adjusting the spacing between the upper and lower spot welding plates through the second screw rod, and adjusting the spacing of the welding blocks through the third screw rod, the welding points are evenly arranged on the heat exchanger main body to ensure the spot welding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 is a use state diagram of the spot welding auxiliary fixture for a heat exchanger;

[0020] Figure 2 is a schematic structural diagram of the auxiliary fixture at a first angle;

[0021] Figure 3 is a schematic structural diagram of the auxiliary fixture at a second angle;

[0022] Figure 4 is Figure 1 the enlarged view of part A in

[0023] In the figure, 1. heat exchanger main body, 11. side plate, 12. nozzle, 2. main board, 3. side board, 4. spot welding plate, 41. welding block, 411. welding hole, 5. first screw rod, 51. handwheel, 52. slider, 6. second screw rod, 7. third screw rod, 8. cross bar, 9. nozzle positioning member, 91. sliding sleeve, 92. top plate, 93. fixed rod, 94. movable rod, 95. spring, 96. locking screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model.

[0025] The heat exchanger includes a heat exchanger body 1, side plates 11 and nozzles 12. Side plates 11 are provided on both the upper and lower sides of the heat exchanger body 1, and nozzles 12 are provided at the four corners of the heat exchanger body 1. Before overall welding, it is necessary to pre-position the side plates 11 by spot welding. In order to ensure the accuracy of the spot welding position, a spot welding auxiliary fixture for the heat exchanger is designed, as Figure 1 shown. The spot welding auxiliary fixture includes a main board 2, a number of correspondingly arranged side plates 3 and spot welding plates 4. The main board 2 is arranged along the length direction of the heat exchanger body 1, the side plates 3 are vertically arranged on the main board 2 on the side of the heat exchanger body 1, and the spot welding plates 4 are vertically against the side plates 3 and abut against the side plates 11. A number of side plates 3 are movably connected to the main board 2 through a first adjustment component, and the spot welding plates 4 are movably connected to the side plates 3 through a second adjustment component.

[0026] The correspondingly arranged side plates 3 and spot welding plates 4 form a set of spot welding units. By adjusting the position of the side plates 3 on the main board 2 through the first adjustment component, that is, adjusting the spacing of the spot welding units, and by adjusting the position of the spot welding plates 4 through the second adjustment component, that is, adjusting the spacing between the upper welding plate group and the lower welding plate group, the fixture is stably clamped outside the heat exchanger body 1. Welding holes 411 are pre-opened on the spot welding plates 4. After the position of the spot welding plates 4 is adjusted, the positions of the solder joints to be spot welded are marked out. Workers can spot weld the side plates 11 according to the positions of the welding holes 411, or use the synchronous auxiliary resistance spot welding device in the publication number CN221019081U for synchronous spot welding. After the fixture is clamped, the electrode heads of the upper side spot welding equipment and the lower side spot welding equipment are respectively placed inside the corresponding welding holes 411 of the upper welding plate group and the lower welding plate group to complete the positioning of the electrode heads of the spot welding equipment. After spot welding, the two electrode heads are respectively placed inside another group of upper and lower opposite welding holes 411. Repeating like this can complete the spot welding pre-positioning of the heat exchanger body 1, and the spot welding plates 4 are arranged according to the specifications of the heat exchanger body 1, that is, the welding holes 411 are evenly distributed, which can ensure the welding stability.

[0027] The first adjustment component and the second adjustment component are respectively a first screw 5 and a second screw 6. Handwheels 51 are fixedly provided at the ends of the first screw 5 and the second screw 6. The side plates 3 and the spot welding plates 4 are respectively connected to the first screw 5 and the second screw 6 through sliders 52. Through the cooperation of the differential screw and the slider 52, the positions of the spot welding plates 4 at both ends of the screw can be adjusted synchronously, and self-locking can be performed. The adjustment is convenient and the stability is good.

[0028] The first screw rod 5 and the second screw rod 6 adopt differential screw rods with symmetric threads at both ends. There are three groups of side plates 3 and spot welding plates 4 correspondingly arranged. The side plate 3 placed in the middle of the heat exchanger main body 1 is fixedly connected to the main board 2. Three groups of spot welding plates 4 are correspondingly arranged on the upper and lower sides of the heat exchanger main body 1. The position of the middle side plate 3 and the main board 2 is fixed and non-adjustable, that is, the position of the middle spot welding plate 4 in the length direction of the heat exchanger main body 1 is fixed, and only the longitudinal adjustment is carried out through the second screw rod 6 on the side plate 3.

[0029] In order to stably clamp the fixture outside the heat exchanger main body 1, the spot welding plate 4 is divided into an upper welding plate group and a lower welding plate group. The upper welding plate group and the lower welding plate group are respectively arranged at both ends of the second screw rod 6 through sliders 52 and abut against the side plates 11 on the upper and lower sides. By rotating the second screw rod 6 through the handwheel 51, the corresponding upper and lower spot welding plates 4 can be synchronously adjusted, and the heat exchanger main body 1 can be clamped synchronously or moved away from the heat exchanger main body 1 synchronously.

[0030] As Figure 2 and 3 shown, welding blocks 41 are arranged on the spot welding plate 4. Welding holes 411 are opened on the welding blocks 41. Three welding blocks 41 are arranged on each spot welding plate 4. A third screw rod 7 for connecting the welding blocks 41 is also arranged on the spot welding plate 4. The welding blocks 41 are connected to the third screw rod 7 through sliders 52. The sliders 52 and the welding blocks 41 are of an integral structure. The welding block 41 placed in the middle of the spot welding plate 4 is fixedly connected to the spot welding plate 4. The welding block 41 in the middle of the spot welding plate 4 is fixed and non-adjustable, while the welding blocks 41 on both sides can adjust their positions through the third screw rod 7 so that the welding holes 411 on each spot welding plate 4 are evenly arranged.

[0031] As Figure 4 shown, in order to adjust and limit the position of the spot welding plate 4 on both sides of the heat exchanger main body 1 from the nozzle 12, a nozzle positioning member 9 is further included. The nozzle positioning member 9 is fixedly connected to the spot welding plate 4 close to the nozzle 12 through a cross bar 8. The cross bar 8 is vertically arranged in the middle of the spot welding plate 4. A scale is arranged on the cross bar 8, and the distance between the spot welding plates 4 on both side edges and the nozzle 12 can be measured and adjusted.

[0032] The nozzle positioning member 9 includes a sliding sleeve 91, a connecting rod and a top plate 92. The sliding sleeve 91 is movably sleeved on the cross bar 8. The top plates 92 are arranged at both ends of the sliding sleeve 91 through the connecting rod. The top plates 92 are clamped on the opposite sides of the nozzle 12. A locking screw 96 is also arranged on the sliding sleeve 91. The locking screw 96 is threadedly connected to the sliding sleeve 91 and can abut against the cross bar 8. The position of the nozzle positioning member 9 can be adjusted by sliding the sliding sleeve 91 along the cross bar 8, and after adjustment, the locking screw 96 is used for limiting.

[0033] The top plate 92 is V-shaped. When two opposite top plates 92 are placed between the two nozzles 12, the position of the sliding sleeve 91 can be automatically positioned, so that the sliding sleeve 91 is located between the two nozzles 12. The connecting rod includes a fixed rod 93, a movable rod 94 and a spring 95. The movable rod 94 is slidably arranged in the fixed rod 93 through the spring 95. When the V-shaped top plate 92 abuts against the nozzle 12, the top plate 92 can be positioned by the nozzle 12, and the position of the welding hole 411 on the spot welding plate 4 can be positioned by the top plate 92, so as to simply and accurately mark the welding point position of the welding hole 411 on the heat exchanger plate body 1, and further improve the spot welding accuracy.

[0034] The above description is illustrative rather than restrictive to the present invention. Those of ordinary skill in the art understand that many modifications, variations or equivalents can be made without departing from the spirit and scope defined by the appended claims, and all of them will fall within the protection scope of the present invention.

Claims

1. A heat exchanger spot welding auxiliary fixture, the heat exchanger comprising a heat exchanger body (1), a side plate (11) and a pipe (12), the side plates (11) are arranged on the upper and lower sides of the heat exchanger body (1), and the pipe (12) is arranged at the four corners of the heat exchanger body (1), characterized in that: The spot welding auxiliary fixture comprises a main board (2), a plurality of correspondingly arranged side boards (3) and a spot welding plate (4); the main board (2) is arranged along the length direction of the heat exchanger body (1); the side boards (3) are arranged perpendicular to the main board (2) on the side of the heat exchanger body (1); the spot welding plate (4) is perpendicular to the side boards (3) and abuts against the side boards (11); a plurality of the side boards (3) are movably connected to the main board (2) via a first adjustment component; and the spot welding plate (4) is movably connected to the side boards (3) via a second adjustment component.

2. The heat exchanger spot welding auxiliary fixture according to claim 1, characterized in that: The first adjustment assembly and the second adjustment assembly are respectively a first screw rod (5) and a second screw rod (6); the ends of the first screw rod (5) and the second screw rod (6) are both fixedly provided with hand wheels (51); and the side plate (3) and the spot welding plate (4) are respectively connected to the first screw rod (5) and the second screw rod (6) via a slider (52).

3. The heat exchanger spot welding auxiliary fixture according to claim 2, characterized in that: The first screw (5) and the second screw (6) are differential screws with symmetrical threads at both ends. The side plates (3) and the spot welding plates (4) are provided in three groups respectively. The side plate (3) disposed in the middle of the heat exchanger body (1) is fixedly connected to the main plate (2).

4. The heat exchanger spot welding auxiliary fixture according to claim 3, characterized in that: The spot welding plate (4) is divided into an upper welding plate group and a lower welding plate group. The upper welding plate group and the lower welding plate group are respectively arranged at both ends of the second screw rod (6) through sliders (52) and abut against upper and lower side plates (11).

5. The heat exchanger spot welding auxiliary fixture according to claim 4, characterized in that: The spot welding plate (4) is provided with a welding block (41), the welding block (41) is provided with a welding hole (411), three welding blocks (41) are provided on each spot welding plate (4), and the spot welding plate (4) is also provided with a third screw (7) for connecting the welding blocks (41).

6. The heat exchanger spot welding auxiliary fixture according to claim 5, characterized in that: The welding block (41) is connected to the third screw rod (7) via a slider (52); the slider (52) and the welding block (41) are an integrated structure; the welding block (41) disposed in the middle of the spot welding plate (4) is fixedly connected to the spot welding plate (4).

7. The heat exchanger spot welding auxiliary fixture according to claim 1, characterized in that: It also comprises a pipe locating member (9), wherein the pipe locating member (9) is fixedly connected to a spot welding plate (4) close to the pipe (12) via a transverse bar (8), wherein the transverse bar (8) is vertically arranged in the middle of the spot welding plate (4).

8. The heat exchanger spot welding auxiliary fixture according to claim 7, characterized in that: The pipe locating member (9) comprises a sliding sleeve (91), a connecting rod and a top plate (92); the sliding sleeve (91) is movably mounted on the horizontal bar (8); top plates (92) are arranged at both ends of the sliding sleeve (91) via connecting rods; and the top plates (92) are clamped on the opposite surface of the pipe (12).

9. The heat exchanger spot welding auxiliary fixture according to claim 8, characterized in that: The top plate (92) is V-shaped, and the connecting rod comprises a fixed rod (93), a movable rod (94) and a spring (95). The movable rod (94) is slidably arranged in the fixed rod (93) through the spring (95).

10. The heat exchanger spot welding auxiliary fixture according to claim 8, characterized in that: The sliding sleeve (91) is also provided with a locking screw (96), the locking screw (96) is threadedly connected to the sliding sleeve (91) and can abut against the horizontal bar (8), and the horizontal bar (8) is provided with a scale.

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