Self-adaptive clamping and positioning device for flange welding

Abstract

The utility model discloses a self-adaptive clamping and positioning device for flange welding, and belongs to the technical field of welding clamps. A catalyst clamping mechanism and a flange clamping mechanism are arranged at the upper end of the base, a sliding rail assembly and a pushing air cylinder are fixed to the upper surface of a top plate of the end support, a sliding block of the sliding rail assembly is fixedly connected with the lower end of a positioning frame, the side wall of the positioning frame is fixedly connected with the movable end of the pushing air cylinder, and the outer side of the top of the positioning frame is fixedly connected with one ends of two symmetrically-arranged auxiliary blocks. The other ends of the two auxiliary blocks are hinged to the middles of the corresponding clamping claws respectively, the outer ends of the two clamping claws are hinged to an outer shell of a clamping air cylinder, and the movable end of the clamping air cylinder is connected with the positioning frame in an abutting mode. According to the utility model, the single propulsion cylinder is matched with the slide rail assembly to realize the axial accurate positioning of the flange, and the clamping cylinder is used for driving the double hinged clamping claws to form self-adaptive enveloping clamping, so that the number of pneumatic elements is reduced and the manufacturing cost and the maintenance complexity of equipment are obviously reduced while the precision requirement of welding flatness is ensured.

Description

Technical Field

[0001] This utility model relates to an adaptive clamping and positioning device for flange welding, belonging to the field of welding fixture technology. Background Technology

[0002] In the manufacturing process of engine exhaust systems, flanges are key connecting components, and their welding quality directly affects the airtightness of the system.

[0003] In existing technologies, single-cylinder driven clamping mechanisms are commonly used for welding positioning of two-hole flanges. These mechanisms achieve pre-assembly and fixation of the flange and pipe body through single-point pressure application. However, due to the asymmetrical distribution of force from a single cylinder, uncontrollable warping deformation easily occurs in the flange welding area under welding thermal stress, resulting in flatness deviations of the flange mating surface exceeding sealing performance requirements.

[0004] To meet airtightness testing standards, existing processes require increasing the number of auxiliary positioning cylinders to compensate for insufficient rigidity in single-point positioning. However, multi-cylinder collaborative control systems have the following technical drawbacks:

[0005] 1. The complexity of the gas path layout increases exponentially, leading to a significant increase in equipment manufacturing costs;

[0006] 2. The cumulative effect of synchronization errors among multiple actuators is aggravated, which may introduce new positioning deviations.

[0007] 3. Maintenance costs increase significantly with the number of pneumatic components, which violates the basic economic requirements of industrial production.

[0008] Therefore, there is an urgent need to develop a new clamping mechanism that can both ensure the flatness accuracy of flange welding and simplify the complexity of the positioning system. Summary of the Invention

[0009] To address the problems existing in the background art, this utility model provides an adaptive clamping and positioning device for flange welding.

[0010] To achieve the above objectives, the present invention adopts the following technical solution: an adaptive clamping and positioning device for flange welding, comprising a base, a catalyst clamping mechanism, and two flange clamping mechanisms; the upper end of the base is equipped with a catalyst clamping mechanism and two flange clamping mechanisms, the catalyst clamping mechanism being located between the two flange clamping mechanisms, each flange clamping mechanism comprising an end support, a slide rail assembly, a positioning frame, a propulsion cylinder, a clamping cylinder, clamping claws, and auxiliary blocks; the end support is fixed to the upper end of the base, the upper surface of the top plate of the end support is fixed with the slide rail assembly and the propulsion cylinder, the slider of the slide rail assembly is fixedly connected to the lower end of the positioning frame, the side wall of the positioning frame is fixedly connected to the movable end of the propulsion cylinder, the outer side of the top of the positioning frame is fixedly connected to one end of two symmetrically arranged auxiliary blocks, the other end of the two auxiliary blocks is respectively hinged to the middle of the corresponding clamping claws, the outer ends of the two clamping claws are hinged to the outer shell of the clamping cylinder, and the movable end of the clamping cylinder is abutting against the positioning frame.

[0011] Furthermore, a limiting block is fixed to the upper surface of the top plate of the end support, and the limiting block is located at the end of the slide rail assembly.

[0012] Furthermore, the catalyst clamping mechanism includes a left support, a right support, and a positioning cylinder; both the left and right supports are vertically installed on the upper end of the base, and both the upper ends of the left and right supports are provided with V-shaped placement grooves. The upper end of the left support is fixedly connected to the fixed end of the positioning cylinder, and the movable end of the positioning cylinder is matched with the V-shaped placement groove of the left support.

[0013] Furthermore, pads are installed on the inner side of the movable end of the positioning cylinder and the inner side of the V-shaped placement groove of the left support.

[0014] Furthermore, the pad is made of rubber or silicone.

[0015] Furthermore, the inner wall of the pad is provided with anti-slip texture.

[0016] Furthermore, the lower end of the right support is provided with a threaded hole, and the upper surface of the base is provided with an elongated slot. The elongated slot is corresponding to the threaded hole, and the right support and the base are fixedly connected by screws provided in the elongated slot and the threaded hole.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This invention employs a single propulsion cylinder in conjunction with a slide rail assembly to achieve precise axial positioning of the flange. A clamping cylinder drives dual-hinged clamping claws to form an adaptive envelope clamping mechanism. While ensuring welding flatness accuracy requirements, this reduces the number of pneumatic components, significantly lowering equipment manufacturing costs and maintenance complexity. The rigid connection design between the positioning frame and the auxiliary block eliminates the cumulative effect of synchronous errors from multiple actuators, keeping the flange mating surface flatness deviation within the sealing performance standard range and preventing warping deformation caused by welding thermal stress. The integrated design of the device is compatible with the universal clamping requirements of two-hole to four-hole flanges. Combined with the V-shaped positioning structure and adjustable right support of the catalytic converter clamping mechanism, it achieves high-precision coplanar welding of core components of the exhaust system. While ensuring the product's airtightness test pass rate, it improves welding efficiency, making it particularly suitable for the large-scale production of automotive exhaust system catalytic converter assemblies and muffler assemblies. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 yes Figure 1 Rear view;

[0021] Figure 3 This is a schematic diagram of one of the flange clamping mechanisms;

[0022] Figure 4 This is a schematic diagram of another flange clamping mechanism. Detailed Implementation

[0023] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0024] An adaptive clamping and positioning device for flange welding includes a base 1, a catalyst clamping mechanism, and two flange clamping mechanisms. The upper end of the base 1 is equipped with the catalyst clamping mechanism and the two flange clamping mechanisms, with the catalyst clamping mechanism located between the two flange clamping mechanisms. Each flange clamping mechanism includes an end support 2, a slide rail assembly 5, a positioning frame 6, a propulsion cylinder 7, a clamping cylinder 8, a clamping claw 11, and an auxiliary block 14. The end support 2 is fixed to the upper end of the base 1, and the top plate of the end support 2... A slide rail assembly 5 and a propulsion cylinder 7 are fixedly mounted on the surface. The slider of the slide rail assembly 5 is fixedly connected to the lower end of the positioning frame 6. The side wall of the positioning frame 6 is fixedly connected to the movable end of the propulsion cylinder 7. The outer side of the top of the positioning frame 6 is fixedly connected to one end of two symmetrically arranged auxiliary blocks 14. The other ends of the two auxiliary blocks 14 are respectively hinged to the middle of the corresponding clamping claws 11. The outer ends of the two clamping claws 11 are both hinged to the outer shell of the clamping cylinder 8. The movable end of the clamping cylinder 8 is abutted against the positioning frame 6.

[0025] Both the propulsion cylinder 7 and the clamping cylinder 8 are existing technologies, and the preferred one is the dual-cylinder device in the Chinese utility model patent with publication number CN205600406U and title "Automatic Valve Picking and Releasing System for Long-Tail Valve Robot".

[0026] Furthermore, a limiting block 13 is fixed on the upper surface of the top plate of the end support 2. The limiting block 13 is located at the end of the slide rail assembly 5 and is used to limit the stroke of the slider of the slide rail assembly 5 to prevent the slider from derailing.

[0027] Furthermore, the catalyst clamping mechanism includes a left support 3, a right support 4, and a positioning cylinder 12; the left support 3 and the right support 4 are both vertically installed on the upper end of the base 1, and the upper ends of the left support 3 and the right support 4 are provided with V-shaped placement grooves. The upper end of the left support 3 is fixedly connected to the fixed end of the positioning cylinder 12, and the movable end of the positioning cylinder 12 is configured to cooperate with the V-shaped placement groove of the left support 3.

[0028] Positioning cylinder 12 is existing technology, preferably Chinese utility model patent with publication number CN211305356U and title "A Manual / Automatic Functional Cylinder".

[0029] Furthermore, pads 15 are installed on the inner side of the movable end of the positioning cylinder 12 and the inner side of the V-shaped placement groove of the left support 3 to increase friction and thus improve the stability of the installation.

[0030] Furthermore, the pad 15 is made of rubber or silicone to avoid damaging the catalyst 9.

[0031] Furthermore, the inner wall of the pad 15 is provided with anti-slip textures such as cross patterns or intersecting diagonal lines to further improve the stability of clamping.

[0032] Furthermore, the lower end of the right support 4 is provided with a threaded hole, and the upper surface of the base 1 is provided with a long slot hole. The long slot hole and the threaded hole are correspondingly arranged. The right support 4 and the base 1 are fixedly connected by screws arranged in the long slot hole and the threaded hole, which facilitates the adjustment of the position of the right support 4 to adapt to the usage requirements of different types of catalysts.

[0033] The method of using this utility model is as follows:

[0034] 1. Adjust the movable end of the positioning cylinder 12 by using the handle of the positioning cylinder 12 to place the catalyst 9 on the left support 3 and the right support 4;

[0035] 2. Push the handles of the two propulsion cylinders 7 respectively to drive the corresponding positioning frame 6 and clamping cylinder 8 to move on the slide rail assembly 5, so that the flanges at both ends of the catalyst 9 are placed in the corresponding clamping claws 11 respectively.

[0036] 3. Adjust the right support 4 to the desired position;

[0037] 4. Adjust the handle of the positioning cylinder 12 to clamp the catalyst 9;

[0038] 5. For the flange at one end of the catalyst 9, place the flange 10 to be welded between the positioning frame 6 and the flange of the catalyst 9;

[0039] 6. Push the handle of the clamping cylinder 8 to pre-clamp the flanges of the flange to be welded 10 and the catalyst 9 through the moving end of the clamping cylinder 8 and the clamping claw 11;

[0040] 7. The clamping cylinder 8 is ventilated through an external air source and a solenoid valve, and the moving end of the clamping cylinder 8 clamps the flange to be welded 10 and the flange of the catalyst 9.

[0041] 8. Weld the flanges of flange 10 and catalyst 9 to be welded;

[0042] 9. Perform the same operation on the flange at the other end of catalyst 9;

[0043] 10. The clamping cylinder 8 is depressurized, pushing the outer shell of the clamping cylinder 8 forward, the clamping claw 11 opens slightly, and the handle of the positioning cylinder 12 releases the catalyst 9;

[0044] 11. Remove the welded catalyst 9.

[0045] 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 forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative 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 the equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An adaptive clamping and positioning device for flange welding, characterized in that: Includes a base (1), a catalyst clamping mechanism, and two flange clamping mechanisms; the upper end of the base (1) is equipped with the catalyst clamping mechanism and the two flange clamping mechanisms, the catalyst clamping mechanism being located between the two flange clamping mechanisms, each of the flange clamping mechanisms including an end support (2), a slide rail assembly (5), a positioning frame (6), a propulsion cylinder (7), a clamping cylinder (8), a clamping claw (11), and an auxiliary block (14); the end support (2) is fixed to the upper end of the base (1), and the upper surface of the top plate of the end support (2) is fixed with the slide rail assembly (5). 5) and the propulsion cylinder (7), the slider of the slide rail assembly (5) is fixedly connected to the lower end of the positioning frame (6), the side wall of the positioning frame (6) is fixedly connected to the movable end of the propulsion cylinder (7), the outer side of the top of the positioning frame (6) is fixedly connected to one end of two symmetrically arranged auxiliary blocks (14), the other end of the two auxiliary blocks (14) is respectively hinged to the middle of the corresponding clamping claws (11), the outer ends of the two clamping claws (11) are both hinged to the outer shell of the clamping cylinder (8), and the movable end of the clamping cylinder (8) is abutted against the positioning frame (6).

2. The adaptive clamping and positioning device for flange welding according to claim 1, characterized in that: A limiting block (13) is fixed on the upper surface of the top plate of the end support (2), and the limiting block (13) is located at the end of the slide rail assembly (5).

3. The adaptive clamping and positioning device for flange welding according to claim 1, characterized in that: The catalyst clamping mechanism includes a left support (3), a right support (4), and a positioning cylinder (12); the left support (3) and the right support (4) are both vertically installed on the upper end of the base (1), and the upper ends of the left support (3) and the right support (4) are provided with V-shaped placement grooves. The upper end of the left support (3) is fixedly connected to the fixed end of the positioning cylinder (12), and the movable end of the positioning cylinder (12) is matched with the V-shaped placement groove of the left support (3).

4. The adaptive clamping and positioning device for flange welding according to claim 3, characterized in that: Pads (15) are installed on the inner side of the movable end of the positioning cylinder (12) and the inner side of the V-shaped placement groove of the left support (3).

5. The adaptive clamping and positioning device for flange welding according to claim 4, characterized in that: The pad (15) is made of rubber or silicone.

6. The adaptive clamping and positioning device for flange welding according to claim 4 or 5, characterized in that: The inner wall of the pad (15) is provided with anti-slip texture.

7. The adaptive clamping and positioning device for flange welding according to claim 3, characterized in that: The lower end of the right support (4) is provided with a threaded hole, and the upper surface of the base (1) is provided with a long slot hole. The long slot hole and the threaded hole are respectively provided. The right support (4) and the base (1) are fixedly connected by screws provided in the long slot hole and the threaded hole.

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