Clamping tool for EGR pipe girth welding

Abstract

The utility model relates to a clamping tool for EGR pipe girth welding, and belongs to the field of clamping tools, and the clamping tool comprises a rack, a first clamping mechanism, a first driving motor for driving the first clamping mechanism to rotate, a second clamping mechanism and a second driving motor for driving the second clamping mechanism to rotate; a rotating shaft of the first clamping mechanism coincides with a rotating shaft of the second clamping mechanism. The first clamping mechanism comprises a first support rotationally installed on the rack, a first clamping base arranged in a sliding mode in the direction parallel to the rotation axis of the first clamping mechanism and used for allowing a flange to be vertically arranged, and a sliding driving piece installed on the first support and used for driving the first clamping base to slide. The second clamping mechanism comprises a second support rotationally installed on the rack, a straight pipe clamping mechanism installed on the second support and used for clamping the straight pipe part of the connecting pipe, and a supporting table installed on the second support and used for supporting the end face of the bent pipe part of the connecting pipe. The welding device has the effect of facilitating welding of the connecting pipe and the flange in the EGR pipe.

Description

Technical Field

[0001] The present application relates to the field of clamping tools, and in particular to a clamping tool for EGR pipe girth welding. Background Art

[0002] The EGR pipe is part of the exhaust gas recirculation system of a car, which is used to return part of the exhaust gas discharged by the engine to the intake pipe and re-enter the cylinder together with the fresh mixed gas. The EGR pipe includes a connecting pipe and a flange welded to one end of the connecting pipe. The connecting pipe includes a straight pipe part and a curved pipe part. During the welding process of the connecting pipe and the flange, a clamping device is required to clamp and fix the connecting pipe and the flange. The current clamping tool for EGR pipe welding mainly includes a first clamping mechanism for clamping the flange, a second clamping mechanism for clamping the connecting pipe, a driving mechanism for driving the first clamping mechanism to slide toward the second clamping mechanism, and a driving motor for driving the first clamping mechanism to rotate. In response to the above-mentioned related technologies, the inventor provides a clamping tool for EGR pipe ring welding. Utility Model Content

[0003] In order to facilitate the welding of the connecting pipe and the flange in the EGR pipe, the present application provides a clamping tool for EGR pipe girth welding.

[0004] The present application provides a clamping tool for EGR pipe girth welding using the following technical solution:

[0005] A clamping tool for EGR pipe ring welding, comprising a frame, a first clamping mechanism horizontally rotatably mounted on the frame, a first drive motor mounted on the frame and driving the first clamping mechanism to rotate, a second clamping mechanism horizontally rotatably mounted on the frame, and a second drive motor mounted on the frame and driving the second clamping mechanism to rotate; the rotation axis of the first clamping mechanism coincides with the rotation axis of the second clamping mechanism; the first clamping mechanism comprises a first bracket rotatably mounted on the frame, a first clamping seat slidingly arranged in a direction parallel to the rotation axis of the first clamping mechanism and used for vertical arrangement of the flange, and a sliding drive member mounted on the first bracket and used to drive the first clamping seat to slide; the second clamping mechanism comprises a second bracket rotatably mounted on the frame, a straight pipe clamping mechanism mounted on the second bracket and used to clamp the straight pipe portion of the connecting pipe, and a support platform mounted on the second bracket and used to support the end face of the curved pipe portion of the connecting pipe.

[0006] By adopting the above technical solution, during the clamping process of the EGR pipe, the flange is first fixed in the first clamping seat of the first clamping mechanism, the straight pipe part of the connecting pipe is placed in the straight pipe clamping mechanism of the second clamping mechanism, and the curved pipe part of the connecting pipe is placed on the support platform; then the first clamping seat is driven to slide toward the second clamping seat by the sliding drive member, so that the connecting pipe is inserted into the flange; finally, the first clamping seat and the second clamping seat are driven by the first drive motor and the second drive motor to realize the rotation of the first clamping seat and the second clamping seat, thereby driving the rotation of the flange and the connecting pipe, which helps to ensure the alignment accuracy and welding quality of the flange and the connecting pipe.

[0007] Optionally, the first clamping seat includes a clamping plate for flange arrangement, two clamping claws hinged to both ends of the clamping plate, and a first driving member for driving the clamping claws to move; the clamping claw includes a clamping end hinged to the clamping plate and used to clamp the flange, and a driving end hinged to the first driving member.

[0008] By adopting the above technical solution, the structure of the first clamping seat is disclosed. The flange is pressed and fixed on the first clamping seat by driving the clamping claws through the first driving member. Two clamping claws are used to prevent the flange from moving on the first clamping seat.

[0009] Optionally, the first driving member is a driving cylinder, wherein the driving end of one of the clamping jaws is hinged to the piston rod of the driving cylinder, and the driving end of the other clamping jaw is hinged to the cylinder housing of the driving cylinder.

[0010] By adopting the above technical solution and using a driving cylinder as the first driving member, it is possible to ensure that the clamping claws can quickly and accurately complete the opening and closing action when needed, which helps to press the flange onto the first clamping seat.

[0011] Optionally, a limiting protrusion corresponding to the through hole on the flange is arranged on the side of the clamping plate facing the second clamping mechanism.

[0012] By adopting the above technical solution, the provision of the limiting boss helps to fix the flange on the clamping plate, reduces the probability of the flange moving, and helps to improve the accuracy of the EGR pipe ring welding.

[0013] Optionally, the sliding drive member is a sliding cylinder, and the first clamping seat is connected to the piston rod of the sliding cylinder; the first bracket has a guide plate, and the first clamping seat is attached to the guide plate and slides along the guide plate.

[0014] By adopting the above technical solution and using a sliding cylinder as the sliding drive element, the sliding of the first clamping seat is efficient and convenient. The guide plate helps to provide guidance for the sliding of the first clamping seat, reducing the probability of the first clamping seat shifting during the sliding process, and facilitating the docking and mating of the flange and the connecting pipe.

[0015] Optionally, a limiting seat is provided at one end of the guide plate close to the second clamping mechanism, and the first clamping seat has a limiting member that cooperates with the limiting seat.

[0016] By adopting the above technical solution, the sliding of the first clamping seat can be limited by the cooperation between the upper limit seat of the guide plate and the upper limit piece of the first clamping seat.

[0017] Optionally, a limiting groove is provided on one side of the limiting seat toward the limiting member; the cross section of the limiting groove is triangular, and the width of the limiting groove gradually increases in the direction away from the limiting member; the limiting member has a limiting protrusion adapted to the limiting groove.

[0018] By adopting the above technical solution, the cross-section of the limit groove is set to a triangle, and the width of the limit groove gradually increases in the direction away from the limit member, which helps to provide guidance for the sliding of the first clamping seat through the cooperation between the limit groove and the limit protrusion, thereby reducing the probability of the first clamping seat being offset during the sliding process.

[0019] Optionally, the straight pipe clamping mechanism includes a second clamping seat installed on the second bracket and used for arranging the straight pipe portion of the connecting pipe, a clamping block for pressing the straight pipe portion of the connecting pipe against the second clamping seat, and a driving assembly for driving the clamping block to move; the second clamping seat has a clamping groove for arranging the straight pipe portion of the connecting pipe.

[0020] By adopting the above technical solution, the structure of the straight pipe clamping mechanism is disclosed, and the straight pipe part of the connecting pipe is placed in the clamping groove of the second clamping seat. The straight pipe part of the connecting pipe is pressed into the clamping groove by the driving component to drive the clamping block, which helps to reduce the probability of movement of the connecting pipe and improve the accuracy of the EGR pipe ring welding.

[0021] Optionally, the driving assembly includes a clamping cylinder mounted on the second bracket and a transmission connecting rod mechanism that is transmission-connected to the clamping cylinder piston rod and the clamping block.

[0022] By adopting the above technical solution, the structure of the drive assembly is disclosed. The setting of the transmission connecting rod assembly helps to improve the structural compactness of the clamping tooling for EGR pipe ring welding. The transmission connecting rod mechanism is driven by the clamping cylinder to achieve precise clamping of the straight pipe part of the connecting pipe.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. A clamping tool for EGR pipe girth welding, comprising: placing a flange in a first clamping seat, placing the straight pipe portion of a connecting pipe in a straight pipe clamping mechanism, and placing the curved pipe portion of the connecting pipe on a support platform; a sliding drive member drives the first clamping seat to slide toward a second clamping seat, thereby inserting the straight pipe portion of the connecting pipe into the flange; and finally, a first drive motor and a second drive motor drive the first and second clamping mechanisms to rotate, thereby driving the rotation of the flange and the connecting pipe, thereby helping to ensure the docking accuracy of the connecting pipe and flange and the accuracy of the EGR pipe girth welding.

[0025] 2. By setting limiting protrusions corresponding to the flange through holes on the clamping plate, the flange placed on the clamping plate is limited, reducing the probability of flange movement and helping to improve the accuracy of EGR pipe girth welding;

[0026] 3. The cooperation between the upper limit seat on the guide plate and the limiting protrusion in the first clamping seat helps to limit the sliding of the first clamping seat, and the triangular cross-section of the limiting groove helps to provide guidance for the sliding of the first clamping seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the connecting pipe and flange in this embodiment.

[0028] Figure 2 Schematic diagram of the clamping tool used for EGR pipe girth welding in this embodiment.

[0029] Figure 3 Schematic diagram of the first clamping mechanism in this embodiment.

[0030] Figure 4 yes Figure 2 A local enlarged schematic diagram of point A in the middle.

[0031] Figure 5 Schematic diagram of the first clamping seat in this embodiment.

[0032] Figure 6 Schematic diagram of the second clamping mechanism in this embodiment.

[0033] Figure 7 Schematic diagram of the straight tube clamping mechanism in this embodiment.

[0034] Explanation of reference numerals: 1, connecting pipe; 11, straight pipe portion; 12, elbow portion; 2, flange; 21, through hole; 22, mounting opening; 3, frame; 31, support frame; 32, first drive motor; 33, second drive motor; 41, first bracket; 411, guide plate; 412, limiting seat; 4121, limiting groove; 42, first clamping seat; 421, limiting member; 4211, limiting protrusion; 422, clamping plate; 4 221. Limiting boss; 423. Clamping claw; 4231. Clamping end; 4232. Driving end; 424. Driving cylinder; 43. Sliding cylinder; 51. Second bracket; 52. Straight tube clamping mechanism; 521. Second clamping seat; 5211. Clamping groove; 522. Pressing block; 5221. Arrangement groove; 523. Clamping cylinder; 524. First connecting rod; 525. First fork seat; 526. Driving rod; 53. Support platform. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-7 The present application is further described in detail. The embodiment of the present application discloses a clamping tool for EGR pipe ring welding. Figure 1 The EGR pipe includes a connecting pipe 1 and a flange 2 welded to one end of the connecting pipe 1. The connecting pipe 1 is a hollow circular pipe, including a straight pipe portion 11 and a curved pipe portion 12. The flange 2 has two symmetrically arranged through holes 21 and an installation port 22 arranged between the two through holes 21 for the straight pipe end of the connecting pipe 1 to be butted and inserted. Since the clamping tool for EGR pipe girth welding in this embodiment is used for the above-mentioned arrangement of the connecting pipe 1 and flange 2, the subsequent connecting pipe 1 and flange 2 and their related features can be directly referred to. Figure 1 , no separate reference to the accompanying drawings is made.

[0036] Reference Figure 2 A clamping fixture for EGR pipe girth welding includes a frame 3, a support frame 31 mounted on the top surface of the frame 3, a first clamping mechanism mounted horizontally and rotatably on the support frame 31, a first drive motor 32 mounted on the support frame 31 and used to drive the first clamping mechanism, a second clamping mechanism mounted horizontally and rotatably on the frame 3, and a second drive motor 33 mounted on the support frame 31 and used to drive the second clamping mechanism. The support frame 31 is fixed to the top surface of the frame 3 by screws, and the first and second clamping mechanisms are arranged opposite each other on the support frame 31. The rotation axis of the first clamping mechanism coincides with the rotation axis of the second clamping mechanism.

[0037] Reference Figure 2 and Figure 3The first clamping mechanism includes a first bracket 41 rotatably mounted on the support frame 31, a first clamping seat 42 slidably arranged parallel to the rotation axis of the first clamping mechanism and configured to vertically position the flange 2, and a sliding drive mounted on the first bracket 41 and configured to drive the first clamping seat 42 to slide toward the second clamping mechanism. The sliding drive is a sliding cylinder 43, the piston rod of which is connected to the first clamping seat 42, driving the first clamping seat 42 to slide toward the second clamping mechanism.

[0038] Reference Figure 3 and Figure 4 The first bracket 41 has a guide plate 411. The first clamping seat 42 is in contact with the guide plate 411 during the sliding process and slides along the extension direction of the guide plate 411. A limit seat 412 is provided on the side of the guide plate 411 near the second clamping mechanism. The first clamping seat 42 has a limit member 421 that abuts against the limit seat 412. The limit seat 412 has a limit slot 4121 on the side facing the limit member 421. The cross-section of the limit slot 4121 is an isosceles triangle. The width of the limit slot 4121 gradually increases in the direction away from the limit member 421. The limit member 421 has a limit protrusion 4211 that is inserted into and matches the limit slot 4121.

[0039] Reference Figure 3 and Figure 5 The first clamping seat 42 includes a clamping plate 422 for mounting the flange 2, two clamping claws 423 hingedly connected to each end of the clamping plate 422, and a first driving member for driving the opening and closing of the clamping claws 423. Two limiting bosses 4221 are arranged on the side of the clamping plate 422 facing the second clamping mechanism, corresponding to the through holes 21 in the flange 2. The clamping claws 423 include a clamping end 4231 hingedly connected to the clamping plate 422 and used to press the flange 2 against the clamping plate 422, and a driving end 4232 hingedly connected to the first driving member. The first driving member is a driving cylinder 424. The driving end 4232 of one clamping claw 423 is hingedly connected to the piston rod of the driving cylinder 424, and the driving end 4232 of the other clamping claw 423 is hingedly connected to the bottom of the cylinder housing of the driving cylinder 424, thereby driving the opening and closing of the two clamping claws 423.

[0040] Reference Figure 6 and Figure 7The second clamping mechanism includes a second bracket 51 rotatably mounted on the support frame 31, a straight pipe clamping mechanism 52 mounted on the second bracket 51 and configured to clamp the straight pipe portion 11 of the connecting pipe 1, and a support platform 53 mounted on the second bracket 51 and configured to support the end face of the curved pipe portion 12 of the connecting pipe 1. When the connecting pipe 1 is mounted on the second clamping mechanism and the flange 2 is mounted on the first clamping mechanism, the end of the straight pipe portion 11 of the connecting pipe 1 is aligned with the mounting opening 22 of the flange 2.

[0041] Reference Figure 6 and Figure 7 The straight pipe clamping mechanism 52 includes a second clamping seat 521 mounted on the second bracket 51 and used to accommodate the straight pipe portion 11 of the connecting pipe 1, a pressing block 522 used to press the straight pipe portion 11 of the connecting pipe 1 against the second clamping seat 521, and a driving assembly for driving the pressing block 522. The second clamping seat 521 has a clamping groove 5211 for accommodating the straight pipe portion 11 of the connecting pipe 1, and the pressing block 522 has an arrangement groove 5221 for accommodating the straight pipe portion 11 of the connecting pipe 1 and cooperating with the clamping groove 5211 to clamp the straight pipe portion 11 of the connecting pipe 1.

[0042] Reference Figure 6 and Figure 7 The driving assembly includes a clamping cylinder 523 mounted on the second bracket 51 and a transmission link mechanism that is transmission-connected to the piston rod of the clamping cylinder 523 and the pressing block 522. The transmission link mechanism includes a first connecting rod 524 hinged to the second bracket 51, a first fork seat 525 mounted on the end of the piston rod of the clamping cylinder 523, and a driving rod 526 hinged to the first fork seat 525 and used for threaded installation of the pressing block 522. The first connecting rod 524 is hinged to the end of the driving rod 526 away from the pressing block 522, the first fork seat 525 is hinged to the end of the driving rod 526 away from the pressing block 522, and the hinge point of the first fork seat 525 and the driving rod 526 is located at the end of the hinge point of the first connecting rod 524 and the driving rod 526 close to the second clamping seat 521.

[0043] The implementation principle of a clamping tool for EGR pipe ring welding in an embodiment of the present application is as follows: the flange 2 is locked on the first clamping mechanism through the cooperation between the clamping plate 422 and the clamping claw 423, and the straight pipe part 11 of the connecting pipe 1 is clamped by the straight pipe clamping mechanism 52, and the end face of the curved pipe part 12 of the connecting pipe 1 is supported on the support platform 53, so that the connecting pipe 1 is locked on the second clamping mechanism; then the first clamping seat 42 is driven by the sliding drive member to slide toward the second clamping seat 521, so that the connecting pipe 1 and the flange 2 are docked and matched; finally, the first clamping mechanism and the second clamping mechanism are driven to rotate by the first drive motor 32 and the second drive motor 33, so as to realize the rotation of the flange 2 and the connecting pipe 1, thereby ensuring the alignment accuracy and welding quality of the flange 2 and the connecting pipe 1.

[0044] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A clamping tool for EGR pipe girth welding, characterized in that: The invention relates to a machine frame (3), a first clamping mechanism horizontally rotatably mounted on the machine frame (3), a first driving motor (32) mounted on the machine frame (3) and driving the first clamping mechanism to rotate, a second clamping mechanism horizontally rotatably mounted on the machine frame (3), and a second driving motor (33) mounted on the machine frame (3) and driving the second clamping mechanism to rotate; the rotation axis of the first clamping mechanism coincides with the rotation axis of the second clamping mechanism; the first clamping mechanism comprises a first bracket (41) rotatably mounted on the machine frame (3), a first bracket (41) extending parallel to the first clamping mechanism, and a second bracket (41) extending parallel to the first clamping mechanism. The invention relates to a first clamping seat (42) which is arranged to slide in the direction of the rotation axis of the structure and is used for vertically arranging the flange (2), and a sliding driving member which is installed on the first bracket (41) and is used to drive the first clamping seat (42) to slide; the second clamping mechanism comprises a second bracket (51) which is rotatably installed on the frame (3), a straight pipe clamping mechanism (52) which is installed on the second bracket (51) and is used to clamp the straight pipe portion (11) of the connecting pipe (1), and a support platform (53) which is installed on the second bracket (51) and is used to support the end face of the curved pipe portion (12) of the connecting pipe (1).

2. The clamping tool for EGR pipe girth welding according to claim 1, characterized in that: The first clamping seat (42) includes a clamping plate (422) for arranging the flange (2), two clamping claws (423) respectively hinged to the two ends of the clamping plate (422), and a first driving member for driving the clamping claws (423) to move; the clamping claws (423) include a clamping end (4231) hinged to the clamping plate (422) and used for pressing the flange (2) and a driving end (4232) hinged to the first driving member.

3. The clamping tool for EGR pipe girth welding according to claim 2, characterized in that: The first driving member is a driving cylinder (424), wherein the driving end (4232) of one of the clamping claws (423) is hinged to the piston rod of the driving cylinder (424), and the driving end (4232) of the other clamping claw (423) is hinged to the cylinder housing of the driving cylinder (424).

4. The clamping tool for EGR pipe girth welding according to claim 2, characterized in that: A limiting convex column (4221) corresponding to the through hole (21) on the flange (2) is arranged on one side of the clamping plate (422) facing the second clamping mechanism.

5. The clamping tool for EGR pipe girth welding according to claim 1, characterized in that: The sliding drive member is a sliding cylinder (43), and the first clamping seat (42) is connected to the piston rod of the sliding cylinder (43); the first bracket (41) has a guide plate (411), and the first clamping seat (42) is attached to the guide plate (411) and slides along the guide plate (411).

6. The clamping tool for EGR pipe girth welding according to claim 5, characterized in that: A limiting seat (412) is provided at one end of the guide plate (411) close to the second clamping mechanism, and the first clamping seat (42) has a limiting component (421) that cooperates with the limiting seat (412).

7. The clamping tool for EGR pipe girth welding according to claim 6, characterized in that: The limiting seat (412) is provided with a limiting groove (4121) on one side facing the limiting member (421); the cross section of the limiting groove (4121) is triangular, and the width of the limiting groove (4121) gradually increases in a direction away from the limiting member (421); the limiting member (421) has a limiting protrusion (4211) adapted to the limiting groove (4121).

8. The clamping tool for EGR pipe girth welding according to claim 1, characterized in that: The straight pipe clamping mechanism (52) comprises a second clamping seat (521) mounted on the second bracket (51) and used for arranging the straight pipe portion (11) of the connecting pipe (1), a pressing block (522) used for pressing the straight pipe portion (11) of the connecting pipe (1) against the second clamping seat (521), and a driving assembly for driving the pressing block (522) to move; the second clamping seat (521) has a clamping groove (5211) for arranging the straight pipe portion (11) of the connecting pipe (1).

9. The clamping tool for EGR pipe girth welding according to claim 8, characterized in that: The driving assembly comprises a clamping cylinder (523) mounted on the second bracket (51) and a transmission connecting rod mechanism that is transmission-connected to a piston rod of the clamping cylinder (523) and a pressing block (522).

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