Auxiliary clamp for welding relieved tooth radiator
By designing a combination of fixture base, support plate, stop assembly and top pressure device, the problem of stable support and rigid fixation of thin-walled finned heat sinks was solved, improving welding quality and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN SONGZHI TECH CO LTD
- Filing Date
- 2025-06-12
- Publication Date
- 2026-05-15
AI Technical Summary
Existing friction stir welding auxiliary fixtures are difficult to provide stable support and rigid fixation when welding thin-walled finned heat sinks, and are inconvenient to operate, affecting welding quality and efficiency.
Design an auxiliary clamp including a clamp base, a support plate, a stop assembly, a fastening device, and a pressing device. The support plate passes through the gap between the fins, the stop assembly and the fastening device abut against the four sides of the clamp, and the pressing device presses down on the top to achieve all-round rigid fixation.
It provides efficient and stable support, prevents fin deformation, ensures welding quality and precision, and improves operational convenience and production efficiency.
Smart Images
Figure CN224238666U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of friction stir welding, and in particular to an auxiliary fixture for welding spade-shaped radiators. Background Technology
[0002] Friction stir welding (FSW) is an advanced solid-state joining technology. It utilizes the frictional heat generated between a high-speed rotating welding tool and the workpiece material to locally bring the material to a plastic state, forming a dense solid-state weld under the stirring and compressing action of the tool. Compared to traditional fusion welding methods, FSW offers advantages such as less deformation, lower residual stress, and superior joint performance. It is particularly suitable for welding low-melting-point materials such as aluminum alloys and copper alloys, and has been widely used in aerospace, automotive, and rail transportation industries.
[0003] However, friction stir welding places strict requirements on the rigid fixation and support of the workpiece. During the welding process, the welding tool generates significant axial forces and torques on the workpiece. If the workpiece is not securely fixed, it is prone to movement, deformation, and even welding defects. Therefore, a rigid base plate is usually installed under the workpiece for support to counteract the welding forces and ensure the quality and consistency of the weld.
[0004] For workpieces with regular structures and flat bottoms, setting up a base plate for support is relatively easy. However, for some special structures, such as heat sinks with thin and densely packed fins, traditional base support methods face significant challenges. Heat sink fins are typically thin and closely spaced; directly placing a base plate on their bottom not only makes effective support difficult but may also lead to fin deformation and damage. Furthermore, the unique structure of heat sinks makes it difficult to provide uniform and stable pressure during welding, thus affecting weld quality.
[0005] Currently, the design of auxiliary fixtures for friction stir welding of special workpieces such as radiators still faces the following technical challenges:
[0006] The challenge of effective support: Providing stable and sufficient support for the heat sink to be welded without damaging the thin-walled fins is crucial to ensuring welding quality. Currently, few existing technologies offer solutions that can effectively insert themselves into the fin gaps and provide reliable support.
[0007] The challenge of rigid fixation: The characteristics of friction stir welding require the workpiece to be rigidly fixed in both the horizontal and vertical directions. For a multi-faceted structure like a radiator, how to apply uniform and reliable clamping force in multiple directions to prevent displacement or shaking during welding is a complex problem.
[0008] Ease of operation and efficiency: The design of auxiliary fixtures must not only consider the effectiveness of support and fixation, but also the ease of operation. Overly complex clamping processes can reduce production efficiency and may even lead to workpiece damage. Therefore, achieving fast, accurate, and non-destructive workpiece clamping is a direction that existing technologies need to improve.
[0009] In summary, existing friction stir welding auxiliary fixtures exhibit problems such as insufficient support, unstable fixation, and inconvenient operation when handling workpieces with complex structures and thin walls, such as radiators. Utility Model Content
[0010] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.
[0011] This utility model provides an auxiliary fixture for welding a spade-shaped radiator, including a fixture base, a support plate, a stop assembly, a fastening device, and a pressing device. The fixture base is installed on the processing platform of a friction stir welding equipment. The support plate is detachably fixed to the fixture base and configured to pass through the fins of the radiator to be welded, providing support for it. The stop assembly is fixed to the fixture base and configured on one long side and one short side of the fixture base. The fastening device is fixed to the other long side and the other short side of the fixture base, thereby abutting the radiator to be welded at each of the four sides of the fixture base, rigidly fixing the radiator to be welded to the fixture base. The pressing device is fixed to the fixture base and configured to press down on the top of the radiator to be welded, keeping it stable in the vertical direction.
[0012] Furthermore, the thickness of the support plate is less than the gap distance between the fins of the heat sink.
[0013] Furthermore, the thickness of the support plate is greater than twice the thickness of the radiator fins.
[0014] Furthermore, the position of the support plate corresponds to the weld position of the heat sink to be welded.
[0015] Furthermore, the stop assembly is provided with a short-side stop block, which is fixed to the short side of the fixture base.
[0016] Furthermore: the stop assembly is provided with a long side stop block, which is fixed to the long side of the fixture base. The side of the long side stop block facing the heat sink to be welded is provided with a limiting groove, and the end of the support plate facing the long side stop block is inserted into the limiting groove.
[0017] Furthermore, the stop assembly is also equipped with a movable stop block, which is fixed to the drive end of the fastening device, so that the radiator is abutted or released under the drive of the fastening device.
[0018] Furthermore: The fastening device is equipped with a fastening bracket, an active slider, a passive slider, and a fastening cylinder. The fastening bracket and the fastening cylinder are respectively installed on the fixture base. The active slider is equipped with an inclined guide rail, and the passive slider is equipped with an inclined guide groove. The inclined guide groove and the inclined guide rail cooperate with each other to form an inclined wedge mechanism. The movable stop is fixed to the passive slider.
[0019] Furthermore: the pressing device is equipped with a pressing cylinder, an adapter arm, and a pressing bar. The pressing cylinder is installed on the fixture base. One end of the adapter arm is rotatably connected to the cylinder body of the pressing cylinder, and the other end is rotatably connected to the middle position of the pressing bar. One end of the pressing bar is rotatably connected to the piston rod of the pressing cylinder, and the other end forms a free end, which is used to press or release the welding workpiece.
[0020] Compared with the prior art, the beneficial effects of this utility model are:
[0021] 1. Highly efficient and stable support: The innovative support plate design, with its optimized thickness, allows it to smoothly insert into the gaps between the radiator fins, providing excellent support for the radiator weld area. This not only avoids damage to the thin-walled fins but also provides sufficient load-bearing capacity to effectively resist the axial forces generated during welding, ensuring the stability of the weld area.
[0022] 2. Comprehensive and Reliable Rigid Fixing: The stop components and fastening devices work together on all four sides of the clamp base to provide all-around contact and clamping for the radiator. Combined with the pressing device on the top, comprehensive rigid fixing of the radiator in both horizontal and vertical directions is achieved, effectively preventing displacement, shaking, and deformation during the welding process, and significantly improving welding accuracy and quality.
[0023] 3. Optimized ease of operation and safety: The detachable design of the support plates and the reasonable control of their number effectively avoid collisions between the support plates and fins during radiator placement, reducing installation difficulty and improving operational efficiency. The design of the limiting groove further assists in the positioning of the support plates, making the clamping process smoother and safer.
[0024] 4. High structural strength and wide applicability: The reasonable selection of the support plate thickness ensures stronger structural strength without affecting insertion, providing stable support for the radiator. The modular design of this auxiliary fixture gives it good versatility, adapting to the welding needs of tinned radiators of different specifications and sizes.
[0025] Through the above improvements, this utility model provides an efficient, stable, and reliable auxiliary clamping solution for heat sinks in friction stir welding through ingenious structural combination and optimized design, which significantly improves welding quality and production efficiency and has important engineering application value.
[0026] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0028] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0029] Figure 2 This is a structural schematic diagram of the clamp base and support plate of this utility model;
[0030] Figure 3 This is a schematic diagram of the short-side stop and the long-side stop of this utility model;
[0031] Figure 4 This is a structural schematic diagram of the support plate and the limiting groove of this utility model;
[0032] Figure 5 This is a schematic diagram of the lead-out notch and limiting groove of this utility model;
[0033] Figure 6 This is a schematic diagram of the top-pressing device of this utility model;
[0034] Figure 7 This is a structural schematic diagram of the fastening device of this utility model.
[0035] The reference numerals and names in the figure are as follows:
[0036] 10. Fixture base; 11. Support plate; 12. Adapter strip; 20. Stop assembly; 21. Movable stop block; 22. Short side stop block; 23. Long side stop block; 24. Limiting groove; 25. Lead-out notch; 26. Welding transition block; 30. Fastening device; 31. Fastening bracket; 32. Fastening cylinder; 33. Active slider; 34. Inclined guide rail; 35. Passive slider; 36. Inclined guide groove; 40. Top pressing device; 41. Top pressing cylinder; 42. Adapter arm; 43. Top pressing strip; 50. Radiator. Detailed Implementation
[0037] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0038] Please see Figures 1 to 7 In this embodiment of the present invention, an auxiliary fixture for welding a spade-shaped radiator includes a fixture base 10, a support plate 11, a stop assembly 20, a fastening device 30, and a pressing device 40. The fixture base 10 is installed on the processing platform of a friction stir welding equipment. The support plate 11 is detachably fixed to the fixture base 10 and configured to pass through the fins of the radiator 50 to be welded, providing support for it. The stop assembly 20 is fixed to the fixture base 10 and configured on one long side and one short side of the fixture base 10. The fastening device 30 is fixed to the other long side and the other short side of the fixture base 10, thereby abutting the radiator 50 to be welded at the four sides of the fixture base 10, so that the radiator 50 to be welded is rigidly fixed to the fixture base 10. The pressing device 40 is fixed to the fixture base 10 and configured to press the top of the radiator 50 to be welded, keeping it stable in the vertical direction.
[0039] Specifically, friction stir welding (FSW) utilizes the heat generated by the friction between a high-speed rotating welding tool and the workpiece to locally melt the materials being welded. As the welding tool moves forward along the welding interface, the plasticized material flows from the front to the rear of the welding tool under the rotational friction force, forming a dense solid-phase weld under the pressure of the welding tool. In the FSW process, the workpiece must be rigidly fixed, and a base plate should be provided for support on the reverse side. However, for workpieces such as radiators 50 with finned structures, it is not convenient to install a base plate for support at the bottom, and the fins are relatively thin, making them prone to deformation when supported. Therefore, how to design auxiliary fixtures to assist the FSW equipment in providing good load-bearing and rigid fixation for the radiator 50 to be welded is a technical problem that needs to be solved.
[0040] This invention provides good support for the heat sink 50 to be welded by setting a support plate 11 on the fixture base 10 and using the relatively thin support plate 11 to pass through the gaps between the fins of the heat sink 50. Since the support plate 11 is relatively thin, in order to better fix it to the fixture base 10, an adapter strip 12 can be set at the part of the support plate 11 close to the fixture base 10. The side wall of the support plate 11 is first fixed to the side wall of the adapter strip 12 by lateral bolts, and then the adapter strip 12 is fixed to the fixture base 10 by vertical bolts, thereby improving the stability of the support plate 11.
[0041] like Figures 1 to 3 As shown, preferably, the thickness of the support plate 11 is less than the gap distance between the fins of the heat sink 50.
[0042] Specifically, in order for the support plate 11 to be inserted into the gap between the fins, it is preferable to set the thickness of the support plate 11 to be less than the width of the gap between the fins. However, the thickness of the support plate 11 cannot be set too thin, otherwise it will not be sufficient to provide stable support for the heat sink 50 to be welded. Therefore, the thickness of the support plate 11 can be set to be slightly less than the width of the gap between the fins, thereby maintaining sufficient thickness to support the entire heat sink 50.
[0043] like Figures 1 to 3 As shown, preferably, the thickness of the support plate 11 is more than twice the thickness of the fins of the radiator 50.
[0044] Specifically, to provide good support for the heat sink 50, the thickness of the support plate 11 is preferably set to be more than twice the thickness of the fins of the heat sink 50. For example, the thickness of the support plate 11 is 2-4 times the thickness of the fins and less than 85% of the fin gap distance. In one embodiment, the thickness of the fins of the heat sink 50 is 2 mm, and the gap distance between two fins is 10 mm. In this case, the thickness of the support plate 11 is preferably set to 8 mm, so that it has as much thickness as possible without affecting the insertion action, thereby forming a stronger structural strength and providing stable support for the heat sink 50.
[0045] like Figures 1 to 3 As shown, preferably, the position of the support plate 11 corresponds to the weld position of the heat sink 50 to be welded.
[0046] Specifically, in order to effectively support the heat sink 50 to be welded during the friction stir welding process, it is preferable to set the support plate 11 at the position corresponding to the weld of the heat sink 50. For example, a support plate 11 is installed and fixed under each weld to support the heat sink 50 on both sides of the weld.
[0047] Secondly, although the more support plates 11 there are, the more stable the support for the radiator 50 will be, the support plates 11 need to be inserted into the gaps between the fins. Therefore, if there are too many support plates 11, the support plates 11 and the fins are prone to bumping into each other during the placement of the radiator 50 by the workers. This makes it difficult to complete the auxiliary installation of the radiator 50 and may even cause damage or misalignment of the fins. Therefore, it is not advisable to set too many support plates 11.
[0048] like Figure 2 and Figure 3As shown, preferably, the stop assembly 20 is provided with a short side stop block 22, which is fixed to the short side of the clamp base 10.
[0049] Specifically, in order to abut the workpiece at the short side of the fixture base 10, a short side stop 22 is preferably installed at this position. Multiple sets of short side stops 22 can be provided, preferably at least two sets, abutting from both ends of the short side of the workpiece, thereby rigidly fixing the workpiece. Furthermore, the short side of the fixture base 10 is parallel to the fins of the heat sink 50, relative to the heat sink 50 to be welded.
[0050] like Figures 2 to 5 As shown, preferably, the stop assembly 20 is provided with a long side stop block 23, which is fixed to the long side of the fixture base 10. The side of the long side stop block 23 facing the heat sink 50 to be welded is provided with a limiting groove 24, and the end of the support plate 11 facing the long side stop block 23 is inserted into the limiting groove 24.
[0051] Specifically, in order to abut the welding workpiece at the position of the long side of the fixture base 10, it is preferable to install a long side block 23 at this position. Multiple sets of long side blocks 23 can be set, preferably one set is set at the position corresponding to each weld, so that the heat sinks 50 on both sides of the weld can be abutted simultaneously, so that the heat sinks 50 on both sides can be rigidly fixed.
[0052] Secondly, in order to fit into the gap between the fins, the support plate 11 is made relatively thin. To enhance its stability, a limiting groove 24 can be provided on the side of the long side block 23 facing the support plate 11, so that one end of the support plate 11 can be inserted into the limiting groove 24. The vertically set limiting groove 24 is used to vertically limit the support plate 11, forming an auxiliary positioning and preventing the support plate 11 from tilting.
[0053] In addition, relative to the heat sink 50 to be welded, the long side of the fixture base 10, which is perpendicular to the fins of the heat sink 50 and also perpendicular to the weld of the heat sink 50, means that the long side block 23 is set in the extension direction of the weld. Therefore, a lead-out notch 25 can be provided on the top side of the long side block 23 facing the weld. A welding transition block 26 is provided in the lead-out notch 25 to assist the starting and retraction of the welding stirring head, and to lead the weld hole generated by friction stir welding out of the weld, so as to facilitate removal by mechanical cutting and ensure the integrity of the weld.
[0054] like Figure 2 and Figure 7As shown, preferably, the stop assembly 20 is further provided with a movable stop 21, which is fixed to the drive end of the fastening device 30, so that the radiator 50 is abutted or released under the drive of the fastening device 30.
[0055] Specifically, fastening devices 30 are provided on the other two sides of the fixture base 10 where the short side stop 22 and the long side stop 23 are not installed. A movable stop 21 is fixed to the driving end of the fastening device 30 by bolts or welding in the prior art. The fastening device 30 drives the movable stop 21 to abut against the workpiece to be welded during welding and form a rigid fixation, or to release it after welding and remove the workpiece to be welded.
[0056] Secondly, corresponding to the long side of the fixture base 10, it is preferable to provide a set of fastening devices 30 and movable blocks 21 at the position corresponding to each weld seam, so that the radiators 50 on both sides of the weld seam are simultaneously abutted, so that the radiators 50 on both sides can be rigidly fixed. Similarly, the movable blocks 21 installed at the long side are preferably provided with limiting grooves 24 and lead-out notches 25 on the side facing the weld seam, so that when the movable blocks 21 are driven by the fastening devices 30 to move towards the radiator 50, the limiting grooves 24 on the movable blocks 21 can also perform auxiliary positioning operations on the support plate 11. The lead-out notches 25 on the movable blocks 21 can also be provided with welding transition blocks 26, so as to lead the weld holes generated by friction stir welding out of the weld seam.
[0057] like Figure 1 , Figure 2 and Figure 7 As shown, preferably, the fastening device 30 is provided with a fastening bracket 31, an active slider 33, a passive slider 35 and a fastening cylinder 32. The fastening bracket 31 and the fastening cylinder 32 are respectively installed on the fixture base 10. The active slider 33 is provided with an inclined guide rail 34, and the passive slider 35 is provided with an inclined guide groove 36. The inclined guide groove 36 and the inclined guide rail 34 cooperate with each other to form an inclined wedge mechanism. The movable stop block 21 is fixed to the passive slider 35.
[0058] Specifically, the active slider 33 is slidably connected to the fastening bracket 31 and configured to move in a direction parallel to the axial direction of the piston rod of the fastening cylinder 32; the passive slider 35 is slidably connected to the fastening bracket 31 and configured to move in a direction perpendicular to the axial direction of the piston rod of the fastening cylinder 32; one end of the active slider 33 is driven to the piston end of the fastening cylinder 32, and the other end is driven to the passive slider 35 via the inclined guide groove 36 and the inclined guide rail 34. The fastening device 30 drives the active slider 33 through the fastening cylinder 32, and uses the inclined wedge mechanism to convert the vertical movement of the active slider 33 into the horizontal movement of the passive slider 35, thereby driving the movable stop 21 to abut or release the welding workpiece.
[0059] Secondly, the fastening bracket 31 is fixedly installed on the upper part of the fixture base 10, corresponding to the usage position of the movable stop 21. The fastening cylinder 32 is preferably installed on the fixture base 10, corresponding to the position below the fastening bracket 31, so that the piston rod of the fastening cylinder 32 can be driven to the active slider 33, driving the active slider 33 to move vertically. The active slider 33 and the passive slider 35 cooperate to form a transmission connection. The vertical movement of the active slider 33 can drive the passive slider 35 to move horizontally, thereby driving the movable stop 21 to abut against the side wall of the welding workpiece, thus achieving rigid fixation.
[0060] Furthermore, the inclined guide groove 36 and the inclined guide rail 34 cooperate to form an inclined wedge mechanism. One end of the active slider 33 is connected to the piston end of the fastening cylinder 32. Its vertical movement is transformed into the horizontal movement of the passive slider 35 through the inclined guide groove 36 and the inclined guide rail 34. This allows the outward extension of the passive slider 35 to change its distance relative to the fastening bracket 31, achieving a certain degree of extension and retraction, thereby driving the movable stop 21 to abut or release the welding workpiece.
[0061] like Figure 1 , Figure 2 and Figure 6 As shown, preferably, the top-pressing device 40 is provided with a top-pressing cylinder 41, an adapter arm 42, and a top-pressing bar 43. The top-pressing cylinder 41 is installed on the fixture base 10. One end of the adapter arm 42 is rotatably connected to the cylinder body of the top-pressing cylinder 41, and the other end is rotatably connected to the middle position of the top-pressing bar 43. One end of the top-pressing bar 43 is rotatably connected to the piston rod of the top-pressing cylinder 41, and the other end forms a free end, which is used to press or release the welding workpiece.
[0062] Specifically, in order to apply a strong pressing operation to the welded workpiece, it is preferable to use the lever principle, with the piston rod of the pressing cylinder 41 rotatably connected to one end of the pressing bar 43, and the adapter arm 42 rotatably connected to the middle of the pressing bar 43, so that the pressing cylinder 41 can rotate and drive the pressing bar 43 to rotate along the adapter arm 42, so that its free end can press against the welded workpiece, improve its stability, and strengthen its rigid fixation strength.
[0063] Secondly, when the piston rod of the top pressure cylinder 41 extends, it applies force through the rotatable connection with one end of the top pressure bar 43, and the adapter arm 42 acts as a fulcrum, causing the top pressure bar 43 to rotate around it, with the free end rotating downward to press the workpiece being welded; when the piston rod retracts, the free end of the top pressure bar 43 lifts up, releasing the pressure on the workpiece being welded.
[0064] Next, the top pressure cylinder 41 drives the top pressure bar 43 to rotate around the central fulcrum through the adapter arm 42, amplifying the pressing force by lever principle. After the free end contacts the workpiece, it continues to apply pressure to the preset value, ensuring that the bottom of the heat sink 50 to be welded is tightly fitted with the top of the support plate 11.
[0065] Additionally, a pressing device 40 can be installed on either the long or short side of the clamp base 10 to press down the top of the heat sink 50. Furthermore, since the heat sink 50 has a relatively long dimension, multiple pressing devices 40 can be installed on the long side to secure it, optimizing the welding process and improving welding quality.
[0066] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.
Claims
1. An auxiliary fixture for welding a spade-shaped radiator, characterized in that, The equipment includes a fixture base (10), a support plate (11), a stop assembly (20), a fastening device (30), and a pressing device (40). The fixture base (10) is installed on the processing platform of the friction stir welding equipment. The support plate (11) is detachably fixed to the fixture base (10) and configured to pass through the fins of the heat sink (50) to be welded to support it. The stop assembly (20) is fixed to the fixture base (10) and configured on one long side and one short side of the fixture base (10). The fastening device (30) is fixed to the other long side and the other short side of the fixture base (10), so that the heat sink (50) to be welded is abutted at the four sides of the fixture base (10) respectively, so that the heat sink (50) to be welded is rigidly fixed to the fixture base (10). The pressing device (40) is fixed to the fixture base (10) and configured to press the top of the heat sink (50) to be welded to keep it stable in the vertical direction.
2. The auxiliary fixture for welding a spade-shaped radiator according to claim 1, characterized in that, The thickness of the support plate (11) is less than the gap distance between the fins of the radiator (50).
3. The auxiliary fixture for welding a spade-shaped radiator according to claim 2, characterized in that, The thickness of the support plate (11) is more than twice the thickness of the fins of the radiator (50).
4. The auxiliary fixture for welding a spade-shaped radiator according to claim 1, characterized in that, The position of the support plate (11) corresponds to the weld position of the heat sink (50) to be welded.
5. The auxiliary fixture for welding a spade-shaped radiator according to claim 4, characterized in that, The stop assembly (20) is provided with a short side stop (22), which is fixed to the short side of the fixture base (10).
6. The auxiliary fixture for welding a spade-shaped radiator according to claim 5, characterized in that, The stop assembly (20) is provided with a long side stop block (23), which is fixed to the long side of the fixture base (10). The side of the long side stop block (23) facing the heat sink (50) to be welded is provided with a limiting groove (24), and the end of the support plate (11) facing the long side stop block (23) is inserted into the limiting groove (24).
7. The auxiliary fixture for welding a spade-shaped radiator according to claim 6, characterized in that, The stop assembly (20) is also provided with a movable stop (21), which is fixed to the drive end of the fastening device (30), so that the radiator (50) is abutted or released under the drive of the fastening device (30).
8. The auxiliary fixture for welding a spade-shaped radiator according to claim 1, characterized in that, The fastening device (30) is provided with a fastening bracket (31), an active slider (33), a passive slider (35) and a fastening cylinder (32). The fastening bracket (31) and the fastening cylinder (32) are respectively installed on the fixture base (10). The active slider (33) is provided with an inclined guide rail (34), and the passive slider (35) is provided with an inclined guide groove (36). The inclined guide groove (36) and the inclined guide rail (34) cooperate with each other to form an inclined wedge mechanism. The movable stop (21) is fixed to the passive slider (35).
9. The auxiliary fixture for welding a spade-shaped radiator according to claim 1, characterized in that, The top pressing device (40) is equipped with a top pressing cylinder (41), an adapter arm (42) and a top pressing bar (43). The top pressing cylinder (41) is installed on the fixture base (10). One end of the adapter arm (42) is rotatably connected to the cylinder body of the top pressing cylinder (41), and the other end is rotatably connected to the middle position of the top pressing bar (43). One end of the top pressing bar (43) is rotatably connected to the piston rod of the top pressing cylinder (41), and the other end forms a free end, which is used to press or release the welding workpiece.