Flange welding tool with self-adaptive clamping mechanism

Abstract

The utility model relates to a flange welding tool with a self-adaptive clamping mechanism. The flange welding tool comprises a base. The pipeline positioning part comprises a pipeline supporting seat arranged on the base and a plurality of pipe body limiting columns which are arranged on the pipeline supporting seat and are arranged in the extending direction of a pipe body; the flange mounting part comprises a fixed seat arranged on the base, a sliding seat arranged on the fixed seat in a sliding mode and a flange clamp arranged on the sliding seat, a dead point mechanism is arranged between the sliding seat and the fixed seat, and a dead point opening mechanism acting on the dead point mechanism is further arranged on the fixed seat. The pipe body and the flange can be accurately positioned, it is guaranteed that the relative position between the flange and the end of the pipe body is kept stable through the dead point mechanism, then it is guaranteed that the pipe body and the flange are kept stable during welding, deformation and displacement are avoided, and the flange welding quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of flange welding technology, and specifically to a flange welding fixture with an adaptive clamping mechanism. Background Technology

[0002] A flange is a component used to connect pipes, connecting the ends of pipes. For example, a typical exhaust system has an intake flange, which connects to the exhaust port of an internal combustion engine. The manufacturing process of an exhaust system includes at least flange welding and airtightness testing of the entire exhaust system. Both of these steps involve clamping and fixing the flange. For instance, during flange welding, it is necessary to fix the flange and ensure the stability of the welding position. Existing welding fixtures are prone to inaccurate positioning of the pipe body and flange when clamping and fixing the flange. Furthermore, the high heat during welding can easily cause displacement or deformation of the flange or pipe body, affecting the welding effect and resulting in poor quality exhaust pipes with a high scrap rate. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a flange welding fixture with an adaptive clamping mechanism, which can accurately position the pipe body and the flange, and ensure that the relative position between the flange and the end of the pipe body remains stable through the dead point mechanism, thereby ensuring that the pipe body and the flange remain stable, without deformation or displacement during welding, and improving the flange welding quality.

[0004] This utility model provides a flange welding fixture with an adaptive clamping mechanism to solve the above-mentioned technical problems, including:

[0005] Base;

[0006] The pipe positioning part includes a pipe support seat disposed on the base and a plurality of pipe limiting posts disposed on the pipe support seat and arranged along the extension direction of the pipe body.

[0007] The flange mounting part includes a fixed seat on the base, a sliding seat slidably disposed on the fixed seat, and a flange clamp disposed on the sliding seat. A dead point mechanism is provided between the sliding seat and the fixed seat, and a dead point opening mechanism acting on the dead point mechanism is also provided on the fixed seat.

[0008] Furthermore, the flange clamp includes two grippers, a baffle fixed to the sliding seat, and a drive frame fixed to the output shaft of a second cylinder fixed to one side of the baffle.

[0009] Two clearance openings are symmetrically provided on the baffle. A first pin is provided in the clearance opening. The claw body of the two grippers is hinged to the drive frame at one end away from the baffle, and the other end is provided with a first sliding hole that slides with the first pin. The claw heads of the two grippers are located on the side of the baffle away from the drive frame and extend towards each other.

[0010] Furthermore, the first sliding hole includes a horizontal hole section and an inclined hole section. The horizontal hole section is located on the side close to the claw head, and the inclined hole section extends toward the output shaft of the second cylinder.

[0011] Furthermore, a pad is provided on the side of the baffle away from the drive frame, the pad is provided with an inner liner and a positioning pin, and the inner liner is provided with a guide slope on the side away from the pad.

[0012] Furthermore, a second pin is provided on the side of the drive frame away from the gripper, a support arm is provided on the sliding seat, a handle is hinged to the upper part of the support arm, and a second sliding hole is provided on the handle to slide with the second pin.

[0013] Furthermore, the dead-point mechanism includes a first link hinged at one end to the fixed seat and a second link hinged at one end to the sliding seat, with the free ends of the first link and the second link hinged to each other.

[0014] Furthermore, the first connecting rod has a bent arm at one end near the second connecting rod, and the bent arm has a positioning protrusion that can abut against the second connecting rod.

[0015] Furthermore, the dead-point opening mechanism includes a first cylinder fixed on the fixed base, the output end of the first cylinder acting on the hinge of the first connecting rod and the second connecting rod.

[0016] Furthermore, the fixed base is provided with a slide rail, and the bottom of the sliding base is provided with a slider that slides in cooperation with the slide rail. The fixed base is also provided with a third cylinder, the output shaft of the third cylinder is fixed to one end of the drive arm, and the other end of the drive arm is fixed to the sliding base.

[0017] Furthermore, a pipe end limiting plate is provided on a pipe body limiting post located away from the flange mounting portion.

[0018] The beneficial effects of this utility model are as follows: The base supports the pipe positioning part and the flange mounting part; the pipe positioning part supports and limits the pipe body, keeping its position stable; the pipe support supports multiple pipe body limiting columns, which in turn limit the pipe body. The pipe support and the pipe body limiting columns ensure that the pipe body remains at the same height as the flange, facilitating alignment between the pipe body and the flange. The flange mounting part clamps and fixes the flange on the sliding seat. The sliding seat and the fixed seat slide together, allowing the sliding seat to move closer to the pipe end, thus moving the flange clamped on the flange clamp towards the pipe end, connecting the flange and the pipe end for welding. Alternatively, after welding, after the flange clamp is released, the sliding seat moves the flange clamp away from the pipe end, facilitating the removal of the welded exhaust pipe. When the flange moves towards the pipe body, the dead-point mechanism between the sliding seat and the fixed seat ensures that the flange is pushed into place and locks the relative position between the flange and the pipe body, ensuring the stability of their relative positions and thus preventing deformation or displacement during welding. The dead-point opening mechanism on the fixed seat unlocks the dead-point mechanism after welding is completed, allowing the sliding seat to move away from the pipe body, facilitating the removal of the welded exhaust pipe.

[0019] In summary, this utility model limits and fixes the exhaust pipe body through the pipe limiting part, and clamps and fixes the exhaust pipe flange through the flange clamp in the flange mounting part; then, the sliding seat moves towards the end of the pipe body, so that the end of the pipe body is connected with the flange. At the same time, the dead point mechanism allows the flange to be pushed into place towards the pipe body and locks the relative position of the pipe body and the flange, keeping the relative position between the flange and the pipe body stable. Its positioning is precise and can effectively control the position between the flange and the pipe body, ensuring that the flange and the pipe body do not shift or deform during the welding process, thus improving the welding quality.

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model equipped with an exhaust pipe;

[0022] Figure 2 This is a schematic diagram of the structure of this utility model without the exhaust pipe assembled.

[0023] Figure 3 This is a schematic cross-sectional view of the flange mounting part of this utility model.

[0024] In the attached diagram: 1-base, 21-pipe support, 22-pipe body limiting post, 221-pipe body end limiting plate, 31-fixed seat, 311-slide rail, 312-third cylinder, 313-drive arm, 32-sliding seat, 321-support arm, 322-handle, 3221-second sliding hole, 323-slider, 4-flange clamp, 41-jaw, 411-jaw body, 412-first sliding hole, 4121-water... 4122-Inclined hole section, 413-Claw head, 42-Baffle, 421-Leaving opening, 422-First pin, 43-Drive frame, 431-Second pin, 44-Second cylinder, 45-Padded block, 46-Inner liner block, 461-Guide inclined surface, 47-Positioning pin, 5-Dead point mechanism, 51-First connecting rod, 52-Second connecting rod, 53-Bending arm, 531-Positioning protrusion, 6-Dead point opening mechanism. Detailed Implementation

[0025] Referring to the accompanying drawings, the specific embodiments of this utility model will be described in detail.

[0026] Reference Figures 1 to 3 This utility model provides a flange welding fixture with an adaptive clamping mechanism, including a base 1, a pipe positioning part, and a flange mounting part. The base 1 is used to support the pipe positioning part and the flange mounting part. The pipe positioning part is used to support and limit the pipe body to keep its position stable. The flange mounting part is used to clamp and fix the flange and enable the flange to move towards the pipe body to dock with the pipe body.

[0027] The pipe positioning section includes a pipe support 21 mounted on the base 1 and multiple pipe limiting posts 22 mounted on the pipe support 21 and arranged along the pipe's extension direction. The pipe support 21 supports the multiple pipe limiting posts 22, which in turn limit the pipe's position, ensuring stability. The pipe support 21 and the pipe limiting posts 22 ensure the pipe remains at the same height as the flange, facilitating alignment between the pipe and the flange. Furthermore, a pipe end limiting plate 221 is provided on one of the pipe limiting posts 22 furthest from the flange mounting section to prevent axial movement of the pipe when the flange presses against it, thus limiting the axial position of the pipe.

[0028] The flange mounting section includes a fixed seat 31 mounted on the base 1, a sliding seat 32 slidably mounted on the fixed seat 31, and a flange clamp 4 mounted on the sliding seat 32. The flange clamp 4 on the sliding seat 32 is used to clamp and fix the flange. The sliding seat 32 is slidably mounted with the fixed seat 31, allowing the sliding seat 32 to move closer to the end of the pipe body, thereby moving the flange clamped on the flange clamp 4 closer to the end of the pipe body, connecting the flange and the end of the pipe body for welding. Alternatively, after welding, after the flange clamp 4 releases the flange, the sliding seat 32 moves the flange clamp 4 away from the end of the pipe body, facilitating the removal of the welded exhaust pipe.

[0029] Furthermore, the fixed base 31 is provided with a slide rail 311, and the bottom of the sliding base 32 is provided with a slider 323 that slides in cooperation with the slide rail 311. The fixed base 31 is also provided with a third cylinder 312, the output shaft of the third cylinder 312 is fixed to one end of the drive arm 313, and the other end of the drive arm 313 is fixed to the sliding base 32. At this time, by extending or retracting the output shaft of the third cylinder 312, the sliding base 32 can be moved on the slide rail 311. Furthermore, a limiting plate is provided on the side of the fixed base 31 near the pipe positioning part to limit the displacement of the sliding base 32.

[0030] In some embodiments, the flange clamp 4 includes two jaws 41, a baffle 42 fixed to the sliding seat 32, and a drive frame 43 fixed to the output shaft of a second cylinder 44 fixed to one side of the baffle 42. The drive frame 43 is located on the side of the second cylinder 44 away from the baffle 42. Two clearance openings 421 are symmetrically provided on the baffle 42. Preferably, the two clearance openings 421 are located on the upper and lower sides. A first pin 422 is provided within each clearance opening 421. One end of the jaw body 411 of the two jaws 41, away from the baffle 42, is hinged to the drive frame 43, and the other end is provided with a first sliding hole 412 that slides with the first pin 422. The jaw heads 413 of the two jaws 41 are located on the side of the baffle 42 away from the drive frame 43 and extend towards each other. Driven by the second cylinder 44, the drive frame 43 can move closer to or further away from the baffle 42. When the output shaft of the second cylinder 44 extends, it drives the drive frame 43 to move away from the baffle 42, thereby driving the jaw body 411 of the gripper 41 hinged to it to move away from the baffle 42 and swing. At this time, the first pin 422 slides in the first sliding hole 412 on the jaw body 411, and the jaw head 413 of the gripper 41 presses against the surface of the flange to press and fix the flange. When the output shaft of the second cylinder 44 retracts, it drives the drive frame 43 to move closer to the baffle 42, thereby causing the jaw heads 413 of the two grippers 41 to loosen the flange, making it easier to remove the welded exhaust pipe.

[0031] Furthermore, a second pin 431 is provided on the side of the drive frame 43 away from the gripper 41, and a support arm 321 is provided on the sliding seat 32. A handle 322 is hinged to the upper part of the support arm 321. A second sliding hole 3221 is provided on the handle 322 to slide and engage with the second pin 431. At this time, the movement of the drive frame 43 can be manually controlled by the handle 322.

[0032] Furthermore, the first sliding hole 412 includes a horizontal hole section 4121 and an inclined hole section 4122. The horizontal hole section 4121 is located on the side close to the claw head 413, and the inclined hole section 4122 extends towards the output shaft of the second cylinder 44. In this case, the inclined hole section 4122 guides the swing of the claw body 411 of the gripper 41 when the drive frame 43 moves, ensuring the stability of the gripper 41's swing while limiting the swing angle of the claw body 411, ensuring that the claw head 413 can press against or move away from the flange surface after the claw body 411 swings. The horizontal hole section 4121 allows the gripper 41 to move horizontally after swinging to a limited angle, thereby pressing against the flange surface; or, when it is necessary to loosen the flange, it can first detach from the flange surface, providing operating space for the swing of the gripper 41, without damaging the flange surface due to friction between the claw head 413 and the flange during the swing of the gripper 41.

[0033] In some embodiments, a pad 45 is provided on the side of the baffle 42 away from the drive frame 43. The pad 45 is provided with an inner liner 46 and a positioning pin 47. The positioning pin 47 is located on the upper and lower sides of the inner liner 46. A guide slope 461 is provided on the side of the inner liner 46 away from the pad 45. The positioning pin 47 is used for initial positioning of the flange. When the flange is pressed against the pipe body, the pipe body is fitted onto the inner liner 46 via the guide slope 461. The inner liner 46 supports the interior of the pipe body, further reducing the possibility of deformation during welding.

[0034] In some embodiments, a dead point mechanism 5 is provided between the sliding seat 32 and the fixed seat 31 to ensure that the flange is pushed into place, to lock the relative position between the flange and the pipe body, to ensure that the relative position between the flange and the pipe body is stable, and thus to ensure that there is no deformation or displacement during welding.

[0035] Specifically, the dead-point mechanism 5 includes a first connecting rod 51 with one end hinged to the fixed seat 31 and a second connecting rod 52 with one end hinged to the sliding seat 32. The free ends of the first connecting rod 51 and the second connecting rod 52 are hinged to each other, and the second connecting rod 52 is located on the side near the pipe positioning part of the baffle 42. When the flange fixed on the baffle 42 is connected to the pipe body, the sliding seat 32 moves towards the side near the pipe positioning part, causing the second connecting rod 52 and the first connecting rod 51 to rotate. When the second connecting rod 52 and the first connecting rod 51 are coaxial, a dead point is formed. At this time, the relative position between the sliding seat 32 and the fixed seat 31 is fixed, thereby fixing the relative position between the flange and the pipe body. Among them, the end of the first connecting rod 51 near the second connecting rod 52 is provided with a bending arm 53, and the bending arm 53 is provided with a positioning protrusion 531 that can abut against the second connecting rod 52. At this time, during the rotation of the first link 51 and the second link 52, the rotation angle of the first link 51 and the second link 52 can be limited by the setting of the positioning protrusion 531. When the positioning protrusion 531 abuts against the upper surface of the second link 52, the first link 51 and the second link 52 are coaxial, and the sliding seat 32 moves to the designated position to avoid excessive rotation and cause the sliding seat 32 to move inaccurately.

[0036] In some embodiments, the fixed base 31 is further provided with a dead point opening mechanism 6 that acts on the dead point mechanism 5, which is used to unlock the dead point mechanism 5 after welding is completed, thereby allowing the sliding base 32 to move away from the pipe body, so as to facilitate the removal of the welded exhaust pipe.

[0037] Specifically, the dead-point opening mechanism 6 includes a first cylinder fixed on the fixed base 31. The output end of the first cylinder acts on the hinge of the first connecting rod 51 and the second connecting rod 52. At this time, the output shaft of the first cylinder extends and pushes against the hinge of the first connecting rod 51 and the second connecting rod 52, so that there is an angle between the axes of the first connecting rod 51 and the second connecting rod 52, thereby unlocking the dead-point mechanism 5 and allowing the sliding base 32 to move.

[0038] In summary, this utility model limits and fixes the exhaust pipe body through the pipe limiting part, and clamps and fixes the exhaust pipe flange through the flange clamp 4 in the flange mounting part; then, the sliding seat 32 moves towards the end of the pipe body, so that the end of the pipe body is connected with the flange. At the same time, the dead point mechanism 5 allows the flange to be pushed into place towards the pipe body and locks the relative position of the pipe body and the flange, keeping the relative position between the flange and the pipe body stable. Its positioning is accurate and can effectively control the position between the flange and the pipe body, ensuring that the flange and the pipe body do not shift or deform during the welding process, thus improving the welding quality.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flange welding tool having an adaptive clamping mechanism, characterized by, include: Base (1); The pipe positioning part includes a pipe support seat (21) disposed on the base (1) and a plurality of pipe limiting posts (22) disposed on the pipe support seat (21) and arranged along the pipe extension direction. The flange mounting part includes a fixed seat (31) disposed on the base (1), a sliding seat (32) slidably disposed on the fixed seat (31), and a flange clamp (4) disposed on the sliding seat (32). A dead point mechanism (5) is provided between the sliding seat (32) and the fixed seat (31). A dead point opening mechanism (6) acting on the dead point mechanism (5) is also provided on the fixed seat (31).

2. The flange welding tooling with adaptive clamping mechanism of claim 1, wherein, The flange clamp (4) includes two jaws (41), a baffle (42) fixed on the sliding seat (32), and a drive frame (43) fixed to the output shaft of a second cylinder (44) fixed on one side of the baffle (42). The baffle (42) is symmetrically provided with two clearance openings (421), and a first pin (422) is provided in the clearance opening (421). The claw body (411) of the two grippers (41) is hinged to the drive frame (43) at one end away from the baffle (42), and the other end is provided with a first sliding hole (412) that slides with the first pin (422). The claw heads (413) of the two grippers (41) are located on the side of the baffle (42) away from the drive frame (43) and extend towards each other.

3. The flange welding tooling with adaptive clamping mechanism of claim 2, wherein, The first sliding hole (412) includes a horizontal hole section (4121) and an inclined hole section (4122). The horizontal hole section (4121) is located on the side close to the claw head (413), and the inclined hole section (4122) extends toward the output shaft of the second cylinder (44).

4. The flange welding tooling with adaptive clamping mechanism of claim 2, wherein, The baffle (42) has a pad (45) on the side away from the drive frame (43). The pad (45) has an inner liner (46) and a positioning pin (47). The inner liner (46) has a guide slope (461) on the side away from the pad (45).

5. The flange welding tooling with adaptive clamping mechanism of claim 2, wherein, The drive frame (43) has a second pin (431) on the side away from the gripper (41). The sliding seat (32) has a support arm (321). A handle (322) is hinged to the upper part of the support arm (321). The handle (322) has a second sliding hole (3221) that slides with the second pin (431).

6. The flange welding fixture with self adaptive clamping mechanism as claimed in claim 1 wherein, The dead point mechanism (5) includes a first link (51) with one end hinged to the fixed seat (31) and a second link (52) with one end hinged to the sliding seat (32), and the free ends of the first link (51) and the second link (52) are hinged to each other.

7. The flange welding tooling with adaptive clamping mechanism of claim 6, wherein, The first link (51) has a bent arm (53) at one end near the second link (52), and the bent arm (53) has a positioning protrusion (531) that can abut against the second link (52).

8. The flange welding tooling with adaptive clamping mechanism of claim 6, wherein, The dead-point opening mechanism (6) includes a first cylinder fixed on the fixed base (31), and the output end of the first cylinder acts on the hinge of the first connecting rod (51) and the second connecting rod (52).

9. The flange welding fixture with self adaptive clamping mechanism as claimed in claim 1 wherein, The fixed seat (31) is provided with a slide rail (311), and the bottom of the sliding seat (32) is provided with a slider (323) that slides with the slide rail (311). The fixed seat (31) is also provided with a third cylinder (312). The output shaft of the third cylinder (312) is fixed to one end of the drive arm (313), and the other end of the drive arm (313) is fixed to the sliding seat (32).

10. The flange welding fixture with self adaptive clamping mechanism as claimed in claim 1 wherein, A pipe end limiting plate (221) is provided on a pipe body limiting post (22) located away from the flange mounting part.

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