Welding auxiliary mechanism

Abstract

The utility model discloses an auxiliary welding mechanism, which belongs to the technical field of test piece welding and comprises a multi-degree-of-freedom mechanical arm, and a clamping mechanism is arranged at the end of the multi-degree-of-freedom mechanical arm. The clamping mechanism comprises a fixed side plate, one side of the fixed side plate is fixedly connected to the end of the multi-freedom-degree mechanical arm, a movable side plate is arranged on the other side of the fixed side plate, and the distance between the movable side plate and the fixed side plate can be adjusted by moving the movable side plate along the guide sliding way. Abutting plates are arranged at the bottoms of the fixed side plate and the movable side plate, the abutting plate at the bottom of the fixed side plate extends towards the movable side plate, and the abutting plate at the bottom of the movable side plate extends towards the fixed side plate; the fixed side plate and the movable side plate are each provided with a long sliding groove, at least two sliding blocks slide on the long sliding grooves, telescopic mechanisms are arranged on the sliding blocks and located above the abutting plate, and the telescopic mechanisms stretch out and draw back to adjust the distance between the ends of the telescopic mechanisms and the abutting plate. According to the structure, the test pieces are convenient to assemble and flexible to overturn, and the device can be suitable for all-directional positioning of different test pieces.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of test piece welding, in particular to a welding auxiliary mechanism. BACKGROUND

[0002] At present, domestic welding manufacturing industry is continuously deepening in the fields of oil and gas equipment, electric power engineering, aerospace, etc., and product structure and product material are also continuously enriched, so that welding process evaluation test pieces, welder qualification test pieces, daily process welding and welder practice test pieces are greatly increased to verify whether welding manufacturing process and welder capability level meet relevant requirements.

[0003] The welding test piece is a process of making a standard size test plate or test tube according to the corresponding specification requirements, welding the test plate or test tube, then sampling for physical and chemical test or nondestructive testing, and judging whether the welding joint under the welding parameters and elements is qualified through the test results.

[0004] At present, the welding of test pieces still stays in a stage with extremely high manual operation, and the assembly, turning over and positioning of test pieces need to be realized by manpower, which is extremely low in efficiency and extremely high in labor intensity. The existing related tooling can realize assembly, but cannot realize one-time clamping and two-side welding, and is inconvenient to convert the orientation, low in efficiency, and cannot realize welding suitable for both test plates and test tubes.

[0005] In view of the above problems, the utility model designs and manufactures a welding auxiliary mechanism to overcome the above defects. UTILITY MODEL CONTENTS

[0006] For the problems existing in the prior art, the welding auxiliary mechanism provided by the utility model makes the assembly of test pieces convenient, turning over flexible, and capable of being suitable for all-around positioning of different test pieces.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme: a welding auxiliary mechanism, comprising a multi-degree-of-freedom mechanical arm, the multi-degree-of-freedom mechanical arm end is provided with a clamping mechanism;

[0008] The clamping mechanism comprises a fixed side plate, one side of the fixed side plate is fixedly connected to the end of the multi-degree-of-freedom mechanical arm, the other side of the fixed side plate is provided with a movable side plate, a guide slide is arranged between the movable side plate and the fixed side plate, and the movable side plate moves along the guide slide to adjust the distance between the movable side plate and the fixed side plate;

[0009] The bottom of the fixed side plate and the movable side plate is provided with an abutting plate, the abutting plate at the bottom of the fixed side plate extends to the movable side plate, and the abutting plate at the bottom of the movable side plate extends to the fixed side plate;

[0010] The fixed side plate and the moving side plate are provided with a long sliding groove, at least two sliding blocks are slidably arranged in the long sliding groove, an extension mechanism is arranged on the sliding blocks, the extension mechanism is arranged above the abutting plate, and the extension mechanism can adjust the distance between the end of the extension mechanism and the abutting plate through extension and retraction.

[0011] Preferably, the fixed side plate and the moving side plate are provided with guide holes at two ends, and the guide holes at the same end of the fixed side plate and the moving side plate are matched with the guide slide.

[0012] Preferably, the side wall of the guide hole is provided with a through screw hole, and a jacking screw is screwed in the screw hole.

[0013] Preferably, the guide slide is provided with a limiting table at two ends, and the limiting table can limit the fixed side plate and the moving side plate from being separated from the guide slide.

[0014] Preferably, the sliding block is a T-shaped block, the web of the T-shaped block is inserted into the long sliding groove, and the wing of the T-shaped block is located outside the fixed side plate or the moving side plate.

[0015] The end of the web of the T-shaped block is provided with the extension mechanism.

[0016] Preferably, the extension mechanism is a fastening bolt, and the sliding block is provided with a screw hole and is screwed with the fastening bolt.

[0017] Preferably, the multi-degree-of-freedom mechanical arm is fixed at the bottom of the movable platform.

[0018] Preferably, the multi-degree-of-freedom mechanical arm comprises a lifting arm, a first mechanical arm is arranged on the lifting arm and can lift along the lifting arm, the first mechanical arm is arranged transversely, a second mechanical arm is rotatably connected to the end of the first mechanical arm, and the rotation axis of the second mechanical arm is consistent with the length direction of the first mechanical arm.

[0019] A third mechanical arm is rotatably connected to the end of the second mechanical arm, and the rotation axis of the third mechanical arm is perpendicular to the length direction of the second mechanical arm.

[0020] Preferably, the first mechanical arm and the second mechanical arm are connected through a worm gear drive device.

[0021] The second mechanical arm and the third mechanical arm are also connected through a worm gear drive device.

[0022] Preferably, a square tube is fixedly connected to the root of the first mechanical arm, the square tube can be sleeved on the lifting arm, and a helical gear is arranged on the square tube.

[0023] A plurality of teeth are arranged on one side of the lifting arm in the vertical direction, the helical gear is engaged with the teeth to drive the first mechanical arm to move up and down on the lifting arm.

[0024] Preferably, the third mechanical arm is an L-shaped arm, one end of the L-shaped arm is rotatably connected to the second mechanical arm, and the other end of the L-shaped arm is connected to the fixed side plate.

[0025] The utility model has the advantages of:

[0026] 1. The clamping mechanism utilizes the telescopic mechanism on the fixed side plate and the movable side plate slider and cooperates with the abutting plate, which can not only realize the pairing of two test plates, but also can simultaneously apply to the pairing of test tubes, and is convenient to adjust, thereby improving the welding efficiency of the test plates and test tubes.

[0027] 2. The clamping size of the utility model is adjustable, which can be suitable for positioning of test plates and test tubes of different specifications, and combined with a multi-degree-of-freedom mechanical arm, replaces manual carrying and moving, reduces labor intensity, and improves the safety factor of work.

[0028] 3. The two paired test plates clamped by the clamping mechanism can realize the effect that both the front and back surfaces can be welded at one time; the two paired test tubes clamped by the clamping mechanism can be clamped again by the clamping mechanism after realizing the welding point fixation, which can meet the 5G and 6G welding of the test tubes. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a structural schematic view of a welding auxiliary mechanism;

[0030] Figure 2 It is a structural schematic view of the clamping mechanism of the utility model;

[0031] Figure 3 It is a schematic view of the vertical welding of two test plates of the utility model;

[0032] Figure 4 It is a schematic view of the back surface flat welding of two test plates of the utility model;

[0033] Figure 5 It is a schematic view of the horizontal welding of two test plates of the utility model;

[0034] Figure 6 It is a schematic view of the front surface flat welding of two test plates of the utility model;

[0035] Figure 7 It is a schematic view of the pairing welding of two test tubes of the utility model;

[0036] Figure 8 It is a schematic view of the 6G welding of two test tubes of the utility model;

[0037] Figure 9 It is a schematic view of the 5G welding of two test tubes of the utility model.

[0038] In the figure: 1 - movable platform, 2 - lifting arm, 3 - tooth, 4 - square tube, 5 - helical gear, 6 - first mechanical arm, 7 - second mechanical arm, 8 - worm gear drive, 9 - third mechanical arm, 10 - clamping mechanism, 11 - fixed side plate, 12 - moving side plate, 13 - guide chute, 14 - long sliding groove, 15 - sliding block, 16 - telescopic mechanism, 17 - abutment plate, 18 - limit table, 19 - tight top screw, 20 - test plate, 21 - test tube. DETAILED DESCRIPTION

[0039] In order to facilitate those skilled in the art to understand, the utility model will be further described below in combination with the drawings.

[0040] As Figures 1 to 9 shown, a kind of welding auxiliary mechanism, including multi-degree-of-freedom mechanical arm, multi-degree-of-freedom mechanical arm end is equipped with clamping mechanism 10, clamping mechanism 10 can clamp test plate 20 or test tube 21, and complete two test plates 20 and the group pair clamping of two test tubes 21.

[0041] Clamping mechanism 10 specifically includes fixed side plate 11, one side of fixed side plate 11 is fixedly connected at the end of multi-degree-of-freedom mechanical arm, the other side of fixed side plate 11 is equipped with moving side plate 12, moving side plate 12 is equipped with guide chute 13 between fixed side plate 11, moving side plate 12 moves along guide chute 13 can adjust the spacing between moving side plate 12 and fixed side plate 11, by adjusting, the spacing adjustment of two test plates 20 group pair can be realized, two test tubes 21 can also be realized clamping.

[0042] Specifically, the bottom of fixed side plate 11 and moving side plate 12 is equipped with abutment plate 17, the abutment plate 17 of fixed side plate 11 bottom extends to moving side plate 12 direction, the abutment plate 17 of moving side plate 12 bottom extends to fixed side plate 11 direction, long sliding groove 14 is equipped on fixed side plate 11 and moving side plate 12, at least two sliding blocks 15 are slid on long sliding groove 14, telescopic mechanism 16 is equipped on sliding block 15, telescopic mechanism 16 is located above abutment plate 17, the spacing between the end of telescopic mechanism 16 and abutment plate 17 can be adjusted by telescopic mechanism 16 extension and contraction.

[0043] When needing to clamp two test plates 20, two test plates 20 can be clamped by telescopic mechanism 16 and abutment plate 17 on fixed side plate 11 and moving side plate 12 respectively;When needing to clamp test tube 21, four-point positioning test tube 21 side wall can be completed by two sliding blocks 15 of fixed side plate 11 and two sliding blocks 15 on moving side plate 12 respectively, the clamping positioning of test tube 21, but need to note, this clamping action needs to be fixed in certain position of long sliding groove 14 by telescopic mechanism 16 and abutment plate 17 abutment sliding block 15.

[0044] In order to adjust the distance between the fixed side plate 11 and the movable side plate 12, guide holes are arranged at both ends of the fixed side plate 11 and the movable side plate 12, and a guide slide 13 is matched in the guide holes at the same end of the fixed side plate 11 and the movable side plate 12, and the guide holes are square holes in the embodiment, and the guide slide 13 is a square column.

[0045] In order to avoid arbitrary sliding of the fixed side plate 11 and the movable side plate 12 on the guide slide 13, a through screw hole is arranged on the side wall of the guide hole, and a tight screw 19 is screwed in the screw hole, and the tight screw 19 at the movable side plate 12 always fixes the guide slide 13 on the movable side plate 12 in the embodiment, and the tight screw 19 at the fixed side plate 11 can be fastened after the test piece is clamped and positioned.

[0046] The utility model discloses the both ends of guide slide 13 are preferably provided with limiting table 18, and the maximum size of limiting table 18 is greater than the size of guide hole, and limiting table 18 can limit the fixed side plate 11 and movable side plate 12 from the disengagement of guide slide 13.

[0047] The sliding block 15 is preferably a T-shaped block, the abdomen of the T-shaped block is inserted into the long sliding groove 14, the wing of the T-shaped block is located outside the fixed side plate 11 or the movable side plate 12, and the end of the abdomen of the T-shaped block is provided with the telescopic mechanism 16.

[0048] The telescopic mechanism 16 is a fastening bolt, and the sliding block 15 is provided with a screw hole and is screwed with the fastening bolt, and the fastening bolt is rotated to realize the approach or the distance from the abutting plate 17, and of course, a driving cylinder and other structures can also be used, which can also meet the demand of clamping the test piece.

[0049] The bottom of the multi-degree-of-freedom mechanical arm is preferably fixed on the movable platform 1, the movable platform 1 is combined by a steel plate and a bottom rectangular tube, and four corners of the bottom of the movable platform 1 are provided with rollers to realize flexible movement of the whole mechanism and facilitate position movement at any time.

[0050] The multi-degree-of-freedom mechanical arm specifically comprises a lifting arm 2, the lifting arm 2 is provided with a first mechanical arm 6 that ascends and descends along the lifting arm 2, the first mechanical arm 6 is horizontally arranged, a second mechanical arm 7 is rotationally connected to the end of the first mechanical arm 6, the rotation axis of the second mechanical arm 7 is consistent with the length direction of the first mechanical arm 6, a third mechanical arm 9 is rotationally connected to the end of the second mechanical arm 7, and the rotation axis of the third mechanical arm 9 is perpendicular to the length direction of the second mechanical arm 7.

[0051] The first mechanical arm 6 is connected with the second mechanical arm 7 through a worm gear driving device 8; the second mechanical arm 7 is also connected with the third mechanical arm 9 through the worm gear driving device 8, the utility model discloses with the help of two sets of worm gear driving devices that can provide 360 ° rotation, in combination with the mechanical arm, the free adjustment of the test piece on the space orientation is realized, and the specific like horizontal welding position, vertical welding position, flat welding position and 45 ° position obliquely upward of the test tube 21.

[0052] The third mechanical arm 9 is preferably an L-shaped arm, one end of the L-shaped arm is rotatably connected to the second mechanical arm 7, and the other end of the L-shaped arm is connected to the fixed side plate 11, so as to avoid interference between the clamping mechanism 10 and the second mechanical arm 7.

[0053] The utility model discloses a first mechanical arm 6 root fixedly connected with square tube 4, square tube 4 can be set on the lifting arm 2, be equipped with screw gear 5 on square tube 4, the lifting arm 2 one side is equipped with a plurality of teeth 3 along the vertical direction, and screw gear 5 is engaged with tooth 3 and drives first mechanical arm 6 to move up and down on the lifting arm 2. The above structure can quickly drive the first mechanical arm 6 to move up and down under the condition of bearing heavy load.

[0054] Test plate 20 group butt welding steps:

[0055] The first mechanical arm 6 is adjusted to the appropriate position to facilitate personnel to transport test pieces for clamping operation, and the two worm gear driving devices 8 are adjusted at the same time, so that the clamping mechanism 10 is in a horizontal position.

[0056] The two test plates 20 are clamped on the abutting plates 17 of the fixed side plate 11 and the movable side plate 12 respectively, the movable side plate 12 moves relative to the fixed side plate 11, and the gap between the two test plates 20 is adjusted.

[0057] The clamping screw 19 on the fixed side plate 11 is tightened, and the fixed side plate 11 is fixed on the guide slide 13.

[0058] The first mechanical arm 6 is adjusted to the appropriate position for welding, and the position and angle of the clamping mechanism 10 can be flexibly adjusted by adjusting the two worm gear driving devices 8, so as to realize flat welding, vertical welding, horizontal welding and double-sided welding.

[0059] Test tube 21 group butt welding steps:

[0060] The first mechanical arm 6 is adjusted to the appropriate position to facilitate personnel to transport test pieces for clamping operation, and the two worm gear driving devices 8 are adjusted at the same time, so that the clamping mechanism 10 is in a horizontal position.

[0061] The two test tubes 21 are placed horizontally on the clamping mechanism 10, the movable side plate 12 moves relative to the fixed side plate 11, the gap between the two test tubes 21 is adjusted at the same time, the two test tubes 21 are clamped coaxially, and then spot welding is carried out.

[0062] The test tube 21 is loosened after spot welding group pair, and the test tube 21 is perpendicular to the abutting plate 17, then the test tube 21 is clamped by the moving side plate 12 and the fixed side plate 11, and the side wall of the test tube 21 is positioned by the two sliders 15 of the fixed side plate 11 and the two sliders 15 on the moving side plate 12;

[0063] The first mechanical arm 6 is adjusted to a suitable position for welding, and the position angle of the clamping mechanism 10 can be flexibly adjusted by adjusting the two worm gear driving devices 8, so that welding in different positions can be realized.

[0064] It should be understood that the use of these embodiments is only for illustrating the present application and is not intended to limit the protection scope of the present application. In addition, it should also be understood that after reading the technical content of the present application, those skilled in the art can make various modifications, modifications and / or variations to the present application, and all these equivalent forms also fall within the protection scope defined by the claims attached to the present application.

Claims

1. A welding auxiliary mechanism, characterized in that: It comprises a multi-degree-of-freedom robotic arm, wherein the end of the multi-degree-of-freedom robotic arm is provided with a clamping mechanism (10); The clamping mechanism (10) comprises a fixed side plate (11), one side of the fixed side plate (11) is fixedly connected to the end of the multi-degree-of-freedom robotic arm, and the other side of the fixed side plate (11) is provided with a movable side plate (12), a guide slideway (13) is provided between the movable side plate (12) and the fixed side plate (11), and the movable side plate (12) moves along the guide slideway (13) to adjust the distance between the movable side plate (12) and the fixed side plate (11); The bottoms of the fixed side plate (11) and the movable side plate (12) are both provided with abutment plates (17), the abutment plates (17) at the bottom of the fixed side plate (11) extending toward the movable side plate (12), and the abutment plates (17) at the bottom of the movable side plate (12) extending toward the fixed side plate (11); The fixed side plate (11) and the movable side plate (12) are both provided with a long slide groove (14), and at least two sliders (15) are slid on the long slide groove (14). The sliders (15) are provided with a telescopic mechanism (16), and the telescopic mechanism (16) is located above the abutment plate (17). The telescopic mechanism (16) can adjust the distance between the end of the telescopic mechanism (16) and the abutment plate (17) by telescoping.

2. A welding auxiliary mechanism according to claim 1, characterized in that: Both ends of the fixed side plate (11) and the movable side plate (12) are provided with guide holes, and the guide slideway (13) is matched in the guide hole at the same end of the fixed side plate (11) and the movable side plate (12).

3. A welding auxiliary mechanism according to claim 2, characterized in that: The side wall of the guide hole is provided with a through screw hole, and a top screw (19) is screwed into the screw hole.

4. A welding auxiliary mechanism according to claim 2, characterized in that: Both ends of the guide slideway (13) are provided with limiting platforms (18), and the limiting platforms (18) can limit the fixed side plate (11) and the movable side plate (12) from detaching from the guide slideway (13).

5. A welding auxiliary mechanism according to claim 1, characterized in that: The slider (15) is configured as a T-shaped block, the belly of the T-shaped block is inserted into the long chute (14), and the wing of the T-shaped block is located outside the fixed side plate (11) or outside the movable side plate (12); The end of the belly of the T-shaped block is provided with the telescopic mechanism (16).

6. A welding auxiliary mechanism according to claim 1, characterized in that: The telescopic mechanism (16) is configured as a fastening bolt, and the slider (15) is provided with a screw hole for threaded connection with the fastening bolt.

7. A welding auxiliary mechanism according to claim 1, characterized in that: The bottom of the multi-degree-of-freedom mechanical arm is fixed on a movable platform (1).

8. The welding auxiliary mechanism according to claim 1, characterized in that: The multi-degree-of-freedom robotic arm comprises a lifting arm (2), wherein a first robotic arm (6) is provided on the lifting arm (2) and is lifted and lowered along the lifting arm (2), the first robotic arm (6) is arranged transversely, and the end of the first robotic arm (6) is rotatably connected to a second robotic arm (7), and the rotation axis of the second robotic arm (7) is consistent with the length direction of the first robotic arm (6); The end of the second mechanical arm (7) is rotatably connected to a third mechanical arm (9), and the rotation axis of the third mechanical arm (9) is perpendicular to the length direction of the second mechanical arm (7).

9. A welding auxiliary mechanism according to claim 8, characterized in that: The first mechanical arm (6) and the second mechanical arm (7) are connected via a worm gear drive device (8); The second mechanical arm (7) and the third mechanical arm (9) are also connected via a worm gear drive device (8).

10. The welding auxiliary mechanism according to claim 8, characterized in that: The first mechanical arm (6) is fixedly connected to a square tube (4) at its root, the square tube (4) can be sleeved on the lifting arm (2), and a helical gear (5) is provided on the square tube (4); A plurality of teeth (3) are provided on one side of the lifting arm (2) in a vertical direction, and the helical gear (5) meshes with the teeth (3) to drive the first mechanical arm (6) to move up and down on the lifting arm (2).

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