Fixing and clamping device for welding multiple groups of structural parts

Abstract

The utility model relates to the technical field of machining, and discloses a fixing and clamping device for welding multiple groups of structural parts. The fixing and clamping device comprises a fixing seat, a first main positioning frame, a first auxiliary positioning frame, a second main positioning frame and a second auxiliary positioning frame. The first main positioning frame is detachably arranged at one end of the fixed seat; the multiple first auxiliary positioning frames are arranged on the two opposite sides of the first main positioning frame; the second main positioning frame is detachably arranged at the other opposite end of the fixed seat; the multiple second auxiliary positioning frames are arranged on the two opposite sides of the second main positioning frame. According to the welding method, the number of times of changing the clamping position is reduced, the risk of generating large welding errors is reduced, and the risk of generating large deformation of the welded structural part is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical processing, for example to a fixing and clamping device for welding multiple sets of structural members. BACKGROUND

[0002] At present, in the case of welding two or more parts together, in order to avoid the parts from shaking and deviating during welding, the parts are usually clamped and fixed before welding to improve the welding precision. In the related art, a multiple set of structural members has a middle cylinder, a left beam, a right beam, a front sleeve hoop and a rear sleeve hoop. There are many positions to be welded, and the welding difficulty is great.

[0003] By using a common clamping tool, the positions to be welded are clamped and fixed, and then welding is performed. Since there are many positions to be welded, the clamping position needs to be changed many times to complete the welding operation.

[0004] In the process of welding the multiple set of structural members by using the common clamping tool, at least the following problems exist:

[0005] Changing the clamping position many times is prone to cause a large welding error, so that the structural member after welding is prone to a large deformation.

[0006] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. CONTENT OF THE UTILITY MODEL

[0007] In order to have a basic understanding of some aspects of the disclosed embodiments, the following is a simple summary. The summary is not a general review, nor is it intended to determine the key / important components or delineate the scope of protection of these embodiments, but as a prelude to the detailed description below.

[0008] The disclosed embodiments provide a fixing and clamping device for welding multiple sets of structural members, to reduce the number of times of changing the clamping position, reduce the risk of a large welding error, and reduce the risk of a large deformation of the structural member after welding.

[0009] In some embodiments, the fixing and clamping device for welding multiple sets of structural members includes a fixing seat, a first main positioning frame, a plurality of first auxiliary positioning frames, a second main positioning frame and a plurality of second auxiliary positioning frames. The first main positioning frame is detachably arranged at one end of the fixing seat; the first auxiliary positioning frames are arranged at opposite sides of the first main positioning frame; the second main positioning frame is detachably arranged at the other end of the fixing seat; and the second auxiliary positioning frames are arranged at opposite sides of the second main positioning frame.

[0010] Optionally, the first main positioning frame is provided with a first main fixing sleeve, and the second main positioning frame is provided with a second main fixing sleeve.

[0011] Optionally, the first main fixing sleeve is slidably provided with a first main shaft for locking and fixing the plurality of groups of structural members in the first main fixing sleeve.

[0012] Optionally, the first main positioning frame is provided with a threaded hole, and a bolt is threadedly connected to the fixing base through the threaded hole.

[0013] Optionally, the height of the first main positioning frame is higher than the height of the first auxiliary positioning frame.

[0014] Optionally, the first auxiliary positioning frame and the second auxiliary positioning frame are detachably connected to the fixing base.

[0015] Optionally, each first auxiliary positioning frame is provided with a first auxiliary fixing sleeve.

[0016] Optionally, each first auxiliary fixing sleeve is slidably provided with a first auxiliary shaft for locking and fixing the plurality of groups of structural members in the first auxiliary fixing sleeve.

[0017] Optionally, the first auxiliary positioning frame is provided with a blocking plate.

[0018] Optionally, the fixing base is provided with a plurality of hooks.

[0019] The fixing and clamping device for welding the plurality of groups of structural members provided by the embodiments of the present disclosure can achieve the following technical effects:

[0020] First, the front sleeve is installed into one end of the middle cylinder, and then the rear sleeve is installed into the other end of the middle cylinder, and then the two ends of the middle cylinder are respectively installed on the first main positioning frame and the second main positioning frame. The left beam is installed on one of the first auxiliary positioning frames and one of the second auxiliary positioning frames, and the right beam is installed on the other first auxiliary positioning frame and the other second auxiliary positioning frame. Then, the first main positioning frame, the plurality of first auxiliary positioning frames, the second main positioning frame and the plurality of second auxiliary positioning frames are installed on the fixing base, and the positioning and fixing of the plurality of groups of structural members are completed. The operator can directly weld the plurality of groups of structural members according to the welding sequence, thereby reducing the number of times of changing the clamping position, reducing the risk of generating a large welding error, and reducing the risk of generating a large deformation of the structural member after welding.

[0021] The foregoing general description and the following description are only exemplary and explanatory, and are not used to limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0022] One or more embodiments are exemplarily illustrated by corresponding drawings, which are not used to limit the embodiments, and elements with the same reference numerals in the drawings show similar elements, the drawings do not constitute a proportional limit, and wherein:

[0023] Figure 1 is a structural schematic diagram of a fixing and clamping device for welding multiple sets of structural members provided by an embodiment of the present disclosure;

[0024] Figure 2 is a structural schematic diagram of the fixing and clamping device for welding multiple sets of structural members clamping multiple sets of structural members provided by an embodiment of the present disclosure;

[0025] Figure 3 is a structural schematic diagram of another fixing and clamping device for welding multiple sets of structural members provided by an embodiment of the present disclosure;

[0026] Figure 4 is a structural schematic diagram of the fixing and clamping device for welding multiple sets of structural members clamping multiple sets of structural members provided by an embodiment of the present disclosure;

[0027] Figure 5 is a structural schematic diagram of another fixing and clamping device for welding multiple sets of structural members provided by an embodiment of the present disclosure;

[0028] Figure 6 is a structural schematic diagram of another fixing and clamping device for welding multiple sets of structural members provided by an embodiment of the present disclosure.

[0029] Reference signs:

[0030] 100, fixing seat; 110, hook; 200, first main positioning frame; 210, first main fixing sleeve; 220, first main connecting sleeve; 230, first main mandrel; 240, first connecting plate; 250, first frame body; 300, first auxiliary positioning frame; 310, first auxiliary fixing sleeve; 320, first auxiliary mandrel; 330, blocking plate; 400, second main positioning frame; 410, second main fixing sleeve; 420, second main connecting sleeve; 430, second main mandrel; 440, second connecting plate; 450, second frame body; 500, second auxiliary positioning frame. DETAILED DESCRIPTION

[0031] In order to enable persons skilled in the art to more fully understand the features and technical contents of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings, which are used only for reference and are not used to limit the embodiments of the present disclosure. In the following technical description, in order to facilitate explanation, a plurality of details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, in order to simplify the drawings, well-known structures and devices can be simplified.

[0032] The terms "first", "second", etc. in the specification and claims of the present disclosure and the above drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so as to implement the embodiments of the present disclosure described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0033] In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "back", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the embodiments of the present disclosure and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to indicating the orientation or positional relationship, the above-mentioned part of the terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0034] In addition, the terms "set", "connected", "fixed" should be broadly understood. For example, "connected" can be fixedly connected, detachably connected, or integrally configured; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0035] Unless otherwise specified, the term "a plurality of" means two or more.

[0036] In the embodiments of the present disclosure, the character " / " represents a "or" relationship between the objects before and after it. For example, A / B means: A or B.

[0037] The term "and / or" is a description of the association between objects, which means that there can be three relationships. For example, A and / or B means: A or B, or, A and B, the three relationships.

[0038] It should be noted that the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0039] In combination with Figures 1-4As shown, the embodiment of the present disclosure provides a fixing and clamping device for welding multiple sets of structural members, which comprises a fixing base 100, a first main positioning frame 200, a plurality of first auxiliary positioning frames 300, a second main positioning frame 400 and a plurality of second auxiliary positioning frames 500. The first main positioning frame 200 is detachably arranged at one end of the fixing base 100; the first auxiliary positioning frames 300 are arranged at opposite sides of the first main positioning frame 200; the second main positioning frame 400 is detachably arranged at the other end of the fixing base 100; and the second auxiliary positioning frames 500 are arranged at opposite sides of the second main positioning frame 400.

[0040] By using the fixing and clamping device for welding multiple sets of structural members provided by the embodiment of the present disclosure, the front sleeve hoop is first arranged in one end of the middle cylinder, the rear sleeve hoop is then arranged in the other end of the middle cylinder, and the two ends of the middle cylinder are then respectively arranged on the first main positioning frame 200 and the second main positioning frame 400. The left beam is arranged on one of the first auxiliary positioning frames 300 and one of the second auxiliary positioning frames 500, and the right beam is arranged on the other first auxiliary positioning frame 300 and the other second auxiliary positioning frame 500. Then, the first main positioning frame 200, the plurality of first auxiliary positioning frames 300, the second main positioning frame 400 and the plurality of second auxiliary positioning frames 500 are arranged on the fixing base 100, and the positioning and fixing of the multiple sets of structural members are completed. The operator can directly weld the multiple sets of structural members according to the welding sequence, thereby reducing the number of times of changing the clamping position, reducing the risk of generating a large welding error, and reducing the risk of generating a large deformation of the structural member after welding.

[0041] Optionally, the fixing base 100 is in a cuboid structure. In this way, the shape of the fixing base 100 is relatively regular, and the position where the fixing base 100 is placed can be flexibly adjusted.

[0042] Optionally, the first main positioning frame 200 and the second main positioning frame 400 are both made of cast iron material. In the case where the first main positioning frame 200 is made of cast iron material, the strength of the first main positioning frame 200 is relatively high, and the first main positioning frame 200 can provide better support force for the middle cylinder. In the case where the second main positioning frame 400 is made of cast iron material, the strength of the second main positioning frame 400 is relatively high, and the second main positioning frame 400 can provide better support force for the middle cylinder. In the case where the first main positioning frame 200 and the second main positioning frame 400 are both made of cast iron material, the strength of the first main positioning frame 200 and the second main positioning frame 400 is relatively high, and the first main positioning frame 200 and the second main positioning frame 400 can provide better support force for the middle cylinder.

[0043] In combination with Figure 4As shown, the first main positioning frame 200 is provided with a first main fixing sleeve 210, and the second main positioning frame 400 is provided with a second main fixing sleeve 410. In this way, one end of the middle cylinder is inserted into the first main fixing sleeve 210, and the area of the middle cylinder in contact with the first main fixing sleeve 210 is relatively large, and the stability of clamping and positioning is relatively high. The other end of the middle cylinder is inserted into the second main fixing sleeve 410, and the area of the middle cylinder in contact with the second main fixing sleeve 410 is relatively large, and the stability of clamping and positioning is relatively high. The risk of shaking and deviation of the middle cylinder during welding is reduced, and the effect of welding is improved.

[0044] Optionally, the axis of the first main fixing sleeve 210 coincides with the axis of the second main fixing sleeve 410. In this way, the first main fixing sleeve 210 and the second main fixing sleeve 410 are arranged with the same center, and in the case that one end of the middle cylinder is inserted into the first fixing sleeve and the other end of the middle cylinder is inserted into the second fixing sleeve, the risk of bending deformation of the middle cylinder is relatively low, and the effect of welding is improved.

[0045] Optionally, the first main fixing sleeve 210 is provided with a first main connecting sleeve 220 at one end facing the second main fixing sleeve 410. In this way, in the case that the middle cylinder is sleeved on the first main fixing sleeve 210, one end of the first main connecting sleeve 220 away from the first main fixing sleeve 210 can abut against the middle cylinder and the front hoop sleeve, reducing the risk of shaking of the middle cylinder and the front hoop sleeve during welding.

[0046] Optionally, the inner side wall of the first main connecting sleeve 220 is threadedly connected with the outer side wall of the first main fixing sleeve 210. In this way, relatively rotating the first main connecting sleeve 220 and the first main fixing sleeve 210 can adjust the relative position of the first main connecting sleeve 220 and the first main fixing sleeve 210, so that the first main connecting sleeve 220 can move towards the second main fixing sleeve 410, so that one end of the first main connecting sleeve 220 away from the first main fixing sleeve 210 can abut against the middle cylinder and the front hoop sleeve, and the stability of abutting and supporting is relatively high, reducing the risk of shaking of the middle cylinder and the front hoop sleeve during welding.

[0047] Optionally, the second main fixing sleeve 410 is provided with a second main connecting sleeve 420 at one end facing the first main fixing sleeve 210. In this way, in the case that the middle cylinder is sleeved on the second main fixing sleeve 410, one end of the second main connecting sleeve 420 away from the second main fixing sleeve 410 can abut against the middle cylinder and the rear hoop sleeve, reducing the risk of shaking of the middle cylinder and the rear hoop sleeve during welding.

[0048] Optionally, the inner wall of the second main connecting sleeve 420 is threadedly connected to the outer wall of the second main fixing sleeve 410. In this way, relative rotation of the second main connecting sleeve 420 and the second main fixing sleeve 410 can adjust their relative positions, allowing the second main connecting sleeve 420 to move towards the first main fixing sleeve 210. This enables the end of the second main connecting sleeve 420 facing away from the second main fixing sleeve 410 to abut against the middle cylinder and the rear clamp sleeve, resulting in relatively high stability of the abutment support and reducing the risk of wobbling of the middle cylinder and the rear clamp sleeve during welding.

[0049] Combination Figure 5 and Figure 6 As shown, optionally, a first main spindle 230 is slidably provided on the first main fixing sleeve 210 for locking and fixing multiple sets of structural components inside the first main fixing sleeve 210. In this way, the first main spindle 230 slides within the first main fixing sleeve 210 until the first main spindle 230 abuts against the multiple sets of structural components, reducing the risk of the multiple sets of structural components swaying and displacing within the first main fixing sleeve 210.

[0050] Understandably, multiple structural components refer to the middle tube.

[0051] Optionally, the first main spindle 230 is slidably disposed within the first main fixing sleeve 210 at one end facing away from the first main fixing sleeve 210. In this way, since the middle cylinder is mounted onto the first main fixing sleeve 210 at one end facing away from the second main fixing sleeve 410, the first main spindle 230 sliding towards the middle cylinder at one end facing away from the first main fixing sleeve 210 is less likely to interfere with the middle cylinder.

[0052] Optionally, a second main spindle 430 is slidably provided on the second main fixing sleeve 410 for locking and fixing multiple sets of structural components inside the second main fixing sleeve 410. In this way, the second main spindle 430 slides within the second main fixing sleeve 410 until the second main spindle 430 abuts against the multiple sets of structural components, reducing the risk of the multiple sets of structural components wobbling and displacing within the second main fixing sleeve 410.

[0053] Optionally, the second main spindle 430 is slidably disposed within the second main fixing sleeve 410 at one end facing away from the first main fixing sleeve 210. In this way, since the middle cylinder is mounted onto the second main fixing sleeve 410 at one end facing away from the first main fixing sleeve 210, the second main spindle 430 sliding towards the middle cylinder at one end facing away from the first main fixing sleeve 210 is less likely to interfere with the middle cylinder.

[0054] Optionally, the first main positioning frame 200 comprises a first connecting plate 240 and a first frame body 250. The first connecting plate 240 is detachably connected with the fixing base 100, and the first frame body 250 is fixedly connected with the first connecting plate 240. In this way, the area of the first connecting plate 240 in contact with the fixing base 100 is relatively large, and the stability of the connection is relatively high.

[0055] Specifically, the top of the first frame body 250 is fixedly connected with the first main fixing sleeve 210. In this way, the height of the first frame body 250 is relatively high, thereby increasing the height of the first main fixing sleeve 210. In the case that the middle cylinder is mounted on the first main fixing sleeve 210, the spacing between the middle cylinder and the fixing base 100 is relatively large, facilitating the welding operation.

[0056] Optionally, the second main positioning frame 400 comprises a second connecting plate 440 and a second frame body 450. The second connecting plate 440 is detachably connected with the fixing base 100, and the second frame body 450 is fixedly connected with the second connecting plate 440. In this way, the area of the second connecting plate 440 in contact with the fixing base 100 is relatively large, and the stability of the connection is relatively high.

[0057] Specifically, the top of the second frame body 450 is fixedly connected with the second main fixing sleeve 410. In this way, the height of the second frame body 450 is relatively high, thereby increasing the height of the second main fixing sleeve 410. In the case that the middle cylinder is mounted on the second main fixing sleeve 410, the spacing between the middle cylinder and the fixing base 100 is relatively large, facilitating the welding operation.

[0058] Optionally, the first main positioning frame 200 is provided with a threaded hole, and a bolt is threadedly connected with the fixing base 100 through the threaded hole. In this way, the bolt is connected with the fixing base 100 through the first main positioning frame 200, the stability of the connection is relatively high, and it is relatively convenient to install or dismount the first main positioning frame 200 on or from the fixing base 100.

[0059] Optionally, the first connecting plate 240 is provided with a plurality of threaded holes, and a bolt is threadedly connected with the fixing base 100 through the threaded holes. In this way, the number of threaded holes is relatively large, the connection positions are relatively large, the connection strength is relatively high, and the risk of relative shaking between the first connecting plate 240 and the fixing base 100 is relatively low.

[0060] Optionally, along the axial direction of the first main fixing sleeve 210, the first connecting plate 240 can be installed at different positions of the fixing base 100 through a bolt. In this way, the first connecting plate 240 is installed at different positions of the fixing base 100, the spacing between the first main fixing sleeve 210 and the second main fixing sleeve 410 is adjusted, different lengths of the middle cylinder are adapted, and the adaptation range is relatively large.

[0061] It can be understood that the fixing base 100 is provided with a plurality of mounting holes corresponding to the connection of the bolt.

[0062] Optionally, the height of the first main positioning frame 200 is higher than the height of the first auxiliary positioning frame 300. In this way, the height of the first main positioning frame 200 is relatively high, so that the position of the middle cylinder is relatively high, and there is a larger interval between the fixed seat 100 and the middle cylinder, which facilitates the welding personnel to extend into the interval to weld the middle cylinder and other components together.

[0063] Optionally, the first auxiliary positioning frame 300 and the second auxiliary positioning frame 500 are detachably connected with the fixed seat 100. In this way, it is more convenient to install or detach the first auxiliary positioning frame 300 and the second auxiliary positioning frame 500 on the fixed seat 100.

[0064] Optionally, along the first main fixing sleeve 210 in the axial direction, the first auxiliary positioning frame 300 can be installed at different positions of the fixed seat 100 by bolts. In this way, by installing the first auxiliary positioning frame 300 at different positions of the fixed seat 100, the interval between the first auxiliary positioning frame 300 and the first main positioning frame 200 is adjusted, which facilitates the adjustment of the relative position of the left beam and the right beam to the middle cylinder, and improves the welding precision. The interval between the first auxiliary positioning frame 300 and the second auxiliary positioning frame 500 can also be adjusted to adapt to different sizes of the left beam and the right beam.

[0065] Optionally, along the first main fixing sleeve 210 in the axial direction, the second auxiliary positioning frame 500 can be installed at different positions of the fixed seat 100 by bolts. In this way, by installing the second auxiliary positioning frame 500 at different positions of the fixed seat 100, the interval between the second auxiliary positioning frame 500 and the second main positioning frame 400 is adjusted, the interval between the first auxiliary positioning frame 300 and the second auxiliary positioning frame 500 is adjusted, and different sizes of the left beam and the right beam are adapted, and the relative position of the left beam and the right beam to the middle cylinder is adjusted.

[0066] Optionally, the first auxiliary positioning frame 300 and / or the second auxiliary positioning frame 500 are made of cast iron material. In the case that the first auxiliary positioning frame 300 is made of cast iron material, the strength of the first auxiliary positioning frame 300 is relatively high, which can provide better support force for the left beam and the right beam. In the case that the second auxiliary positioning frame 500 is made of cast iron material, the strength of the second auxiliary positioning frame 500 is relatively high, which can provide better support force for the left beam and the right beam. In the case that the first auxiliary positioning frame 300 and the second auxiliary positioning frame 500 are both made of cast iron material, better support force can be provided for the left beam and the right beam.

[0067] Optionally, each first auxiliary positioning frame 300 is provided with a first auxiliary fixing sleeve 310. In this way, one end of the left beam and one end of the right beam are inserted into the corresponding first auxiliary fixing sleeve 310, the contact area is relatively large, the connection stability is relatively high, the risk of deviation of the left beam and the right beam from the first auxiliary fixing sleeve 310 is relatively low, and the welding precision is improved.

[0068] Optionally, a first sub-core shaft 320 is slidably arranged on each first sub-fixing sleeve 310, for locking and fixing the plurality of structural members in the first sub-fixing sleeve 310. In this way, the first sub-core shaft 320 slides in the first sub-fixing sleeve 310 until the first sub-core shaft 320 abuts against the plurality of structural members, and the first sub-core shaft 320 cooperates with the first fixing sleeve to clamp and fix the left beam, with relatively high stability.

[0069] It can be understood that the plurality of structural members refer to the left beam and the right beam.

[0070] Optionally, the first sub-positioning frame 300 is provided with a blocking plate 330. In this way, the first sub-core shaft 320, the blocking plate 330 and the first fixing sleeve cooperatively clamp and fix the left beam or the right beam, with relatively high stability.

[0071] Specifically, one blocking plate 330 is inserted into each first sub-positioning frame 300.

[0072] Optionally, the fixing seat 100 is provided with a plurality of lifting hooks 110. In this way, the fixing seat 100 can be lifted and adjusted to place the fixing seat 100 through the lifting hooks 110.

[0073] Specifically, the lifting hook 110 is provided with four, and each lifting hook 110 is threadedly connected with the fixing seat 100. In this way, the lifting hook 110 can be detached from the fixing seat 100, reducing the risk of interference with the welding operation.

[0074] The above description and drawings sufficiently illustrate the embodiments of the present disclosure to enable one skilled in the art to practice them. Other embodiments can include structural and other changes. The embodiments are merely representative of the possible variations. Individual components and functions are optional unless explicitly required, and the order of operations can be changed. Parts and features of some embodiments can be included or replaced by parts and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A fixture for holding a plurality of structural members for welding, comprising: The utility model relates to a fixing clamping device for welding multiple groups of structural members, comprising: a fixing base (100); a first main positioning frame (200) detachably arranged at one end of the fixing base (100); a plurality of first auxiliary positioning frames (300) arranged at opposite sides of the first main positioning frame (200); a second main positioning frame (400) detachably arranged at the other end of the fixing base (100); a plurality of second auxiliary positioning frames (500) arranged at opposite sides of the second main positioning frame (400).

2. The fixing clamping device for welding multiple groups of structural members according to claim 1, wherein: a first main fixing sleeve (210) is arranged on the first main positioning frame (200), and a second main fixing sleeve (410) is arranged on the second main positioning frame (400).

3. The fixing clamping device for welding multiple groups of structural members according to claim 2, wherein: a first main spindle (230) is slidably arranged on the first main fixing sleeve (210) to lock and fix the multiple groups of structural members in the first main fixing sleeve (210).

4. The fixing clamping device for welding multiple groups of structural members according to claim 1, wherein: a threaded hole is arranged on the first main positioning frame (200), and a bolt is threadedly connected with the fixing base (100) through the threaded hole.

5. The fixing clamping device for welding multiple groups of structural members according to claim 1, wherein: the height of the first main positioning frame (200) is higher than the height of the first auxiliary positioning frame (300).

6. The fixing clamping device for welding multiple groups of structural members according to claim 1, wherein: the first auxiliary positioning frame (300) and the second auxiliary positioning frame (500) are detachably connected with the fixing base (100).

7. The fixing clamping device for welding multiple groups of structural members according to claim 6, wherein: a first auxiliary fixing sleeve (310) is arranged on each first auxiliary positioning frame (300).

8. The fixing clamping device for welding multiple groups of structural members according to claim 7, wherein: a first auxiliary spindle (320) is slidably arranged on each first auxiliary fixing sleeve (310) to lock and fix the multiple groups of structural members in the first auxiliary fixing sleeve (310).

9. The fixing clamping device for welding multiple groups of structural members according to claim 6, wherein: a baffle plate (330) is arranged on the first auxiliary positioning frame (300).

10. The fixing clamping device for welding multiple groups of structural members according to any one of claims 1 to 9, wherein: a plurality of hooks (110) are arranged on the fixing base (100).

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