Middle channel longitudinal beam welding clamp

Abstract

The utility model discloses a middle channel longitudinal beam welding fixture which comprises a base, a clamping mechanism, a positioning mechanism and a detection mechanism, the clamping mechanism is arranged on the base, and the clamping mechanism can press a reinforcing plate arranged at a groove of a middle channel longitudinal beam into the groove and clamp the middle channel longitudinal beam after the reinforcing plate is pressed into the groove; the positioning mechanism comprises an assembly positioning pin, a main positioning pin and an auxiliary positioning pin, the middle channel longitudinal beam is positioned on the clamping mechanism through the main positioning pin and the auxiliary positioning pin, and the reinforcing plate is positioned on the middle channel longitudinal beam through the assembly positioning pin; the detection mechanisms are arranged on the clamping mechanism, and the multiple detection mechanisms correspond to the positions, where nuts need to be welded, of the middle channel longitudinal beam after the reinforcing plate is pressed into the groove formed in the clamping mechanism, so that the nuts welded to the middle channel longitudinal beam after the reinforcing plate is pressed into the groove formed in the clamping mechanism can trigger the detection mechanisms. Therefore, positioning and clamping of a workpiece are realized while nut detection is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile production and manufacturing, especially relates to a middle channel longitudinal beam welding fixture. BACKGROUND

[0002] To ensure the structural strength of the middle channel longitudinal beam of the automobile, the longitudinal beam must be reinforced by welding a reinforcing plate. To ensure the welding quality, a clamping tool is used to fix the middle channel longitudinal beam and the reinforcing plate, ensuring precise butt joint of the welding position. A large number of nuts are welded on the middle channel longitudinal beam. In the actual production process, it is difficult for the first-line operators to continuously maintain high concentration for a long time. This continuous high-intensity work state may lead to operational errors, such as nut missing welding, thereby causing product defects.

[0003] To ensure product quality and prevent defective products from flowing out, the nut welding condition is usually checked separately. Due to the fast production rhythm and large production volume, the independent checking process will affect the overall production efficiency, manifested as temporary stoppage of the production line or the need for additional human resources to speed up the checking speed to ensure product pass rate, which has a negative impact on production efficiency. SUMMARY

[0004] The utility model provides a kind of middle channel longitudinal beam welding fixture to realize the positioning of workpiece while realizing nut detection.

[0005] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0006] A middle channel longitudinal beam welding fixture, comprising: a base, a clamping mechanism, a positioning mechanism and a detection mechanism, the clamping mechanism is arranged on the base, the clamping mechanism can press the reinforcing plate placed in the groove of the middle channel longitudinal beam into the groove, and the middle channel longitudinal beam after the reinforcing plate is pressed into the groove is clamped;

[0007] The positioning mechanism includes assembly positioning pins, main positioning pins and auxiliary positioning pins, the middle channel longitudinal beam is positioned on the clamping mechanism by the main positioning pins and the auxiliary positioning pins, and the reinforcing plate is positioned on the middle channel longitudinal beam by the assembly positioning pins;

[0008] The detection mechanism is arranged on the clamping mechanism, and a plurality of detection mechanisms correspond to the positions where nuts need to be welded on the middle channel longitudinal beam after the reinforcing plate is pressed into the groove on the clamping mechanism, so that the nuts welded on the middle channel longitudinal beam after the reinforcing plate is pressed into the groove on the clamping mechanism can trigger the detection mechanism.

[0009] Further, the clamping mechanism comprises a first clamping mechanism, a second clamping mechanism and a third clamping mechanism, which are respectively used for clamping one end of the middle channel longitudinal beam with the reinforcing plate, the middle part of the middle channel longitudinal beam and the end of the middle channel longitudinal beam away from the reinforcing plate, and the first clamping mechanism can press the reinforcing plate placed in the groove of the middle channel longitudinal beam into the groove.

[0010] Further, the first clamping mechanism comprises a first cylinder, a first pressing lever and a first support hinged with the first pressing lever through a first pin shaft, the first pressing lever is provided with a pressing rod, the assembly positioning pin is fixed on the first support, and the first support is fixed on the base;

[0011] The piston cylinder of the first cylinder is hinged with the first support, the piston rod of the first cylinder is hinged with one end of the first pressing lever, and the other end of the first pressing lever is provided with a pressing block;

[0012] The first pressing lever is driven to rotate around the first pin shaft through the pressing rod, so that the pressing block presses the reinforcing plate placed in the groove of the middle channel longitudinal beam into the groove;

[0013] The piston rod of the first cylinder can drive the first pressing lever to rotate around the first pin shaft, so that the pressing block presses the middle channel longitudinal beam after the reinforcing plate is pressed into the groove on the first support.

[0014] Further, the second clamping mechanism comprises a second cylinder, a second pressing lever and a second support hinged with the second pressing lever through a second pin shaft, and the second support is fixed on the base;

[0015] The piston cylinder of the second cylinder is hinged with the second support, the piston rod of the second cylinder is hinged with one end of the second pressing lever, and the other end of the second pressing lever is provided with a pressing block;

[0016] The piston rod of the second cylinder can drive the second pressing lever to rotate around the second pin shaft, so that the pressing block presses the middle channel longitudinal beam on the second support.

[0017] Further, the third clamping mechanism comprises a third cylinder, a third pressing lever and a third support hinged with the third pressing lever through a third pin shaft, the auxiliary positioning pin is fixed on the third support, and the third support is fixed on the base;

[0018] The piston cylinder of the third cylinder is hinged with the third support, the piston rod of the third cylinder is hinged with one end of the third pressing lever, and the other end of the third pressing lever is provided with a pressing block;

[0019] The piston rod of the third cylinder can drive the third pressing lever to rotate around the third pin shaft, so that the pressing block presses the middle channel longitudinal beam on the third support.

[0020] Further, the telescopic mechanism comprises a cylinder, a main positioning pin support and a cylinder support, the cylinder support is fixed on the base, the piston cylinder of the cylinder is fixed on the cylinder support, the piston rod of the cylinder is fixedly connected with the main positioning pin support, and the main positioning pin support is provided with a pin hole for installing a main positioning pin.

[0021] Further, the detection mechanism comprises an inductive sensor and a sensor support, the inductive sensor is arranged on the sensor support, the sensor support is provided with a waist-shaped hole, and the sensor support is fixed on the clamping mechanism through bolts in the waist-shaped hole.

[0022] The display screen is further provided with an indicating lamp connected with the inductive sensor.

[0023] Further, the base is provided with a universal pulley at the bottom.

[0024] Beneficial effects: the middle channel longitudinal beam welding clamp provided by the utility model, through the clamping mechanism, the positioning mechanism and the detection mechanism, the main positioning pin and the auxiliary positioning pin of the positioning mechanism can position the middle channel longitudinal beam on the clamping mechanism in the process of placing the middle channel longitudinal beam on the clamping mechanism, the assembly positioning pin can position the reinforcing plate on the middle channel longitudinal beam, the reinforcing plate is installed on the middle channel longitudinal beam through the clamping mechanism and clamped in the recess, and the detection mechanism is used for detecting whether the nut is missing welding on the middle channel longitudinal beam on the clamping mechanism, the positioning and clamping functions are realized at the same time in the process of realizing the nut missing welding detection, the production efficiency is effectively improved, and unqualified products are prevented from flowing out. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for ordinary skilled in the art, other drawings can be obtained according to these drawings without paying the creative labor.

[0026] Figure 1 It is a structural schematic view of the middle channel longitudinal beam welding clamp disclosed by the utility model;

[0027] Figure 2 It is a top view of the middle channel longitudinal beam welding clamp disclosed by the utility model;

[0028] Figure 3The utility model discloses a structure schematic drawing of middle passage longitudinal beam and reinforcing plate;

[0029] Figure 4 The utility model discloses a structure schematic drawing of first clamping mechanism and telescopic mechanism of middle passage longitudinal beam welding fixture,

[0030] Figure 5 The utility model discloses a structure schematic drawing of first clamping mechanism and telescopic mechanism of middle passage longitudinal beam welding fixture,

[0031] Figure 6 The utility model discloses a structure schematic drawing of second clamping mechanism of middle passage longitudinal beam welding fixture,

[0032] Figure 7 The utility model discloses a structure schematic drawing of second clamping mechanism of middle passage longitudinal beam welding fixture,

[0033] Figure 8 The utility model discloses a structure schematic drawing of third clamping mechanism of middle passage longitudinal beam welding fixture,

[0034] Figure 9 The utility model discloses a structure schematic drawing of third clamping mechanism of middle passage longitudinal beam welding fixture.

[0035] In the drawing,

[0036] 1, first clamping mechanism, 11, first pressing lever, 12, first support, 13, first air cylinder, 14, first pin shaft,

[0037] 2, second clamping mechanism, 21, second pressing lever, 22, second support, 23, second air cylinder, 24, second pin shaft,

[0038] 3, third clamping mechanism, 31, third pressing lever, 32, third support, 33, third air cylinder, 34, third pin shaft,

[0039] 4, assembly positioning pin,

[0040] 5, main positioning pin,

[0041] 6, auxiliary positioning pin,

[0042] 7, base,

[0043] 8, pressing block,

[0044] 9, pressing lever,

[0045] 10, telescopic mechanism, 101, air cylinder, 102, main positioning pin support, 103, air cylinder support,

[0046] 20, inductive sensor,

[0047] 30, sensor support;

[0048] 40, display screen;

[0049] A, middle channel longitudinal beam; B, reinforcing plate. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0051] The embodiment provides a middle channel longitudinal beam welding clamp, as shown in Figure 1 and Figure 2 , which comprises a base 7, a clamping mechanism, a positioning mechanism and a detection mechanism, the clamping mechanism is arranged on the base 7, the clamping mechanism can press the reinforcing plate B placed in the recess of the middle channel longitudinal beam A into the recess, and clamp the middle channel longitudinal beam A after the reinforcing plate B is pressed into the recess, and the middle channel longitudinal beam A after the reinforcing plate B is pressed into the recess is as shown in Figure 3 .

[0052] As shown in Figure 4 , Figure 5 and Figure 9 , the positioning mechanism comprises an assembly positioning pin 4, a main positioning pin 5 and a vice positioning pin 6, the middle channel longitudinal beam A is positioned on the clamping mechanism by the main positioning pin 5 and the vice positioning pin 6, and the reinforcing plate B is positioned on the middle channel longitudinal beam A by the assembly positioning pin 4.

[0053] The detection mechanism is arranged on the clamping mechanism, a plurality of detection mechanisms correspond to positions, on which nuts need to be welded, of the middle channel longitudinal beam A after the reinforcing plate B is pressed into the recess on the clamping mechanism, so that the nuts welded on the middle channel longitudinal beam A after the reinforcing plate B is pressed into the recess on the clamping mechanism can trigger the detection mechanism.

[0054] The embodiment provides a middle channel longitudinal beam welding clamp, which is characterized in that the main positioning pin 5 and the auxiliary positioning pin 6 of the positioning mechanism can position the middle channel longitudinal beam A on the clamping mechanism, and the assembly positioning pin 4 can position the reinforcing plate B on the middle channel longitudinal beam A during the process of placing the middle channel longitudinal beam A on the clamping mechanism; the reinforcing plate B is installed on the middle channel longitudinal beam A through the clamping mechanism and is pressed into the middle channel longitudinal beam A after being clamped in the groove; the detection mechanism is used for detecting whether the nut is missing welding on the middle channel longitudinal beam A on the clamping mechanism; the positioning and clamping functions are realized synchronously during the nut missing welding detection, the production efficiency is effectively improved, and the unqualified products are prevented from flowing out.

[0055] In specific embodiments, as shown in Figure 1 and Figure 2 , the clamping mechanism comprises a first clamping mechanism 1, a second clamping mechanism 2 and a third clamping mechanism 3, which are respectively used for clamping one end of the middle channel longitudinal beam A with the reinforcing plate B, the middle part of the middle channel longitudinal beam A and the end of the middle channel longitudinal beam A away from the reinforcing plate B, and the first clamping mechanism 1 can press the reinforcing plate B placed in the groove of the middle channel longitudinal beam A into the groove.

[0056] In specific embodiments, as shown in Figure 4 and Figure 5 , the first clamping mechanism 1 comprises a first cylinder 13, a first pressing lever 11 and a first support 12 hinged with the first pressing lever 11 through a first pin shaft 14, a pressing rod 9 is fixed on the first pressing lever 11, the assembly positioning pin 4 is fixed on the first support 12, and the first support 12 is fixed on the base 7 through bolts;

[0057] The piston cylinder of the first cylinder 13 is hinged with the first support 12 through a pin shaft, the piston rod of the first cylinder 13 is hinged with one end of the first pressing lever 11 through a pin shaft, and the other end of the first pressing lever 11 is fixed with a pressing block 8 through bolts, and the shape of the pressing block 8 is matched with the contour of the part to be pressed;

[0058] The first pressing lever 11 is driven to rotate around the first pin shaft 14 through the pressing rod 9, so that the pressing block 8 presses the reinforcing plate B placed in the groove of the middle channel longitudinal beam A into the groove;

[0059] The piston rod of the first cylinder 13 can drive the first pressing lever 11 to rotate around the first pin shaft 14, so that the pressing block 8 presses the middle channel longitudinal beam A with the reinforcing plate B on the first support 12;

[0060] The reinforcing plate B needs to be pressed into the groove of the center channel longitudinal beam A for welding. The reinforcing plate B cannot be directly pressed into the groove by the first cylinder 13, and it is easy to deform. Therefore, the operator needs to rotate the first pressing lever 11 around the first pin shaft 14 by means of the pressing rod 9, position the reinforcing plate B on the center channel longitudinal beam A by the positioning pin 4, and manually press the reinforcing plate B into the groove of the center channel longitudinal beam A (before operating the pressing rod 9, the first cylinder 13 needs to be deflated to ensure that the operator can rotate the first pressing lever 11), and then the first cylinder 13 is inflated to clamp the center channel longitudinal beam A with the reinforcing plate B pressed into the groove on the first clamping mechanism 1;

[0061] Figure 1 and Figure 2 Among them, the base 7 is provided with two sets of clamping mechanisms, positioning mechanisms and detection mechanisms at the same time, and two center channel longitudinal beams A can be clamped at the same time;

[0062] Figure 4 and Figure 5 The first clamping mechanism 1 in Figure 1 and Figure 2 The first clamping mechanism 1 in

[0063] In specific embodiments, as shown in Figure 6 and Figure 7 The second clamping mechanism 2 includes a second cylinder 23, a second pressing lever 21, and a second support 22 hinged to the second pressing lever 21 through a second pin shaft 24, and the second support 22 is fixed on the base 7 by bolts;

[0064] The piston cylinder of the second cylinder 23 is hinged to the second support 22 through a pin shaft, the piston rod of the second cylinder 23 is hinged to one end of the second pressing lever 21 through a pin shaft, and the other end of the second pressing lever 21 is fixed with a pressing block 8 by bolts, and the shape of the pressing block 8 is matched with the contour of the part to be pressed;

[0065] The piston rod of the second cylinder 23 can drive the second pressing lever 21 to rotate around the second pin shaft 24, so that the pressing block 8 presses the center channel longitudinal beam A on the second support 22;

[0066] Figure 6 and Figure 7 The second clamping mechanism 2 in Figure 1 and Figure 2 The second clamping mechanism 2 in

[0067] In specific embodiments, as shown inFigure 8 and Figure 9 As shown in

[0068] The piston cylinder of the third cylinder 33 is hinged with the third support 32 through a pin shaft, and the piston rod of the third cylinder 33 is hinged with one end of the third pressing lever 31 through a pin shaft, and the other end of the third pressing lever 31 is fixed with a pressing block 8 through a bolt, and the shape of the pressing block 8 is matched with the profile of the part to be pressed;

[0069] The piston rod of the third cylinder 33 can drive the third pressing lever 31 to rotate around the third pin shaft 34, so that the pressing block 8 presses the middle channel longitudinal beam A on the third support 32;

[0070] Figure 8 and Figure 9 The third clamping mechanism 3 in Figure 1 and Figure 2 The third clamping mechanism 3 is shown in both clamping and opening states, and the third pressing lever 31 is drawn to show the opening angle of the third pressing lever 31.

[0071] In specific embodiments, as shown in Figure 1 and Figure 2 It also includes a telescopic mechanism 10, which includes a cylinder 101, a main positioning pin support 102 and a cylinder support 103, the cylinder support 103 is fixed on the base 7 through a bolt, the piston cylinder of the cylinder 101 is fixed on the cylinder support 103, the piston rod of the cylinder 101 is fixedly connected with the main positioning pin support 102 through a bolt, the main positioning pin support 102 is provided with a pin hole for installing the main positioning pin 5, and the main positioning pin 5 is installed on the pin hole;

[0072] After the reinforcing plate B and the middle channel longitudinal beam A are welded together, the middle channel longitudinal beam A needs to be removed, and the middle channel longitudinal beam A positioned by the assembly positioning pin 4, the main positioning pin 5 and the auxiliary positioning pin 6 is inconvenient to remove from the clamping mechanism, so the telescopic mechanism 10 is provided, the main positioning pin 5 is lowered to make the main positioning pin 5 away from the middle channel longitudinal beam A, and the positioning points are reduced, so that the middle channel longitudinal beam A can be removed more easily.

[0073] In specific embodiments, as shown in Figure 6 to Figure 9As shown, the detection mechanism includes inductive sensors 20 and sensor holders 30, the inductive sensors 20 are arranged on the sensor holders 30, the number of inductive sensors 20 is determined according to the number of nuts to be detected, the sensor holders 30 are provided with waist-shaped holes, and the sensor holders 30 are fixed on the clamping mechanism through bolts in the waist-shaped holes, so that the position of the sensor holders 30 relative to the clamping mechanism is adjusted, and it is ensured that the inductive sensors 20 can better align the nuts on the workpiece;

[0074] As shown in Figure 1 and Figure 2 It also includes a display screen 40, which is provided with indicator lights connected to the inductive sensors 20, and when the inductive sensors 20 detect the corresponding nuts, the indicator lights are lit;

[0075] In this embodiment, the inductive sensors 20 can be proximity switches, when the nuts are welded at the specified points of the workpiece, the nuts at the specified points are triggered by contacting the proximity switches, and the indicator lights are lit; when the nuts are not welded at the specified points of the workpiece, it is a missed welding, at this time the proximity switch cannot be triggered, and the indicator light remains off;

[0076] In actual use, it also includes a control box, which is provided with buttons for controlling the first cylinder 13, the second cylinder 23 and the third cylinder 33, the first cylinder 13, the second cylinder 23 and the third cylinder 33 are controlled to extend or retract through the buttons, and the first pressing lever 11, the second pressing lever 21 and the third pressing lever drive the pressing block 8 to clamp or move away from the center channel longitudinal beam A.

[0077] In specific embodiments, the base 7 is provided with universal pulleys at the bottom to facilitate the overall transfer of the center channel longitudinal beam welding clamp.

[0078] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A welding fixture for a central channel longitudinal beam, characterized in that, include: The base (7), clamping mechanism, positioning mechanism and detection mechanism are provided on the base (7). The clamping mechanism can press the reinforcing plate placed in the groove of the middle channel longitudinal beam into the groove and clamp the middle channel longitudinal beam after the reinforcing plate is pressed into the groove. The positioning mechanism includes an assembly positioning pin (4), a main positioning pin (5) and a secondary positioning pin (6). The central channel longitudinal beam is positioned on the clamping mechanism by the main positioning pin (5) and the secondary positioning pin (6). The reinforcing plate is positioned on the central channel longitudinal beam by the assembly positioning pin (4). The detection mechanism is mounted on the clamping mechanism. Multiple detection mechanisms correspond to the positions on the longitudinal beam of the central channel after the reinforcing plate is pressed into the groove of the clamping mechanism, which are to be welded to the nuts. This allows the nuts welded on the longitudinal beam of the central channel after the reinforcing plate is pressed into the groove of the clamping mechanism to trigger the detection mechanism.

2. The welding fixture for the longitudinal beam of the central channel according to claim 1, characterized in that, The clamping mechanism includes a first clamping mechanism (1), a second clamping mechanism (2), and a third clamping mechanism (3), which are respectively used to clamp one end of the middle channel longitudinal beam with a reinforcing plate, the middle part of the middle channel longitudinal beam, and the end of the middle channel longitudinal beam away from the reinforcing plate. The first clamping mechanism (1) can press the reinforcing plate placed in the groove of the middle channel longitudinal beam into the groove.

3. The welding fixture for the longitudinal beam of the central channel according to claim 2, characterized in that, The first clamping mechanism (1) includes a first cylinder (13), a first clamping lever (11), and a first support (12) hinged to the first clamping lever (11) via a first pin (14). The first clamping lever (11) is provided with a pressure bar (9). The assembly positioning pin (4) is fixed on the first support (12), and the first support (12) is fixed on the base (7). The piston cylinder of the first cylinder (13) is hinged to the first support (12), the piston rod of the first cylinder (13) is hinged to one end of the first pressing lever (11), and the other end of the first pressing lever (11) is provided with a pressing block (8); The first pressing lever (11) is driven to rotate around the first pin (14) by the pressing bar (9), so that the pressing block (8) presses the reinforcing plate placed in the groove of the longitudinal beam of the middle channel into the groove; The piston rod of the first cylinder (13) can drive the first pressing lever (11) to rotate around the first pin (14), so that the pressing block (8) presses the longitudinal beam of the middle channel after the reinforcing plate is pressed into the groove onto the first support (12).

4. The welding fixture for the longitudinal beam of the central channel according to claim 2, characterized in that, The second clamping mechanism (2) includes a second cylinder (23), a second clamping lever (21), and a second support (22) hinged to the second clamping lever (21) via a second pin (24). The second support (22) is fixed on the base (7). The piston cylinder of the second cylinder (23) is hinged to the second support (22), the piston rod of the second cylinder (23) is hinged to one end of the second pressing lever (21), and the other end of the second pressing lever (21) is provided with a pressing block (8); The piston rod of the second cylinder (23) can drive the second clamping lever (21) to rotate around the second pin (24), so that the clamping block (8) presses the middle channel longitudinal beam onto the second support (22).

5. A welding fixture for a central channel longitudinal beam according to claim 2, characterized in that, The third clamping mechanism (3) includes a third cylinder (33), a third clamping lever (31), and a third support (32) hinged to the third clamping lever (31) via a third pin (34). The secondary positioning pin (6) is fixed on the third support (32), and the third support (32) is fixed on the base (7). The piston cylinder of the third cylinder (33) is hinged to the third support (32), the piston rod of the third cylinder (33) is hinged to one end of the third clamping lever (31), and the other end of the third clamping lever (31) is provided with a clamping block (8); The piston rod of the third cylinder (33) can drive the third clamping lever (31) to rotate around the third pin (34), so that the clamping block (8) presses the middle channel longitudinal beam onto the third support (32).

6. A welding fixture for a central channel longitudinal beam according to claim 3, characterized in that, It also includes a telescopic mechanism (10), which includes a cylinder (101), a main positioning pin bracket (102) and a cylinder bracket (103). The cylinder bracket (103) is fixed on the base (7), the piston cylinder of the cylinder (101) is fixed on the cylinder bracket (103), the piston rod of the cylinder (101) is fixedly connected to the main positioning pin bracket (102), and the main positioning pin bracket (102) is provided with a pin hole for installing the main positioning pin (5).

7. A welding fixture for a central channel longitudinal beam according to claim 1, characterized in that, The detection mechanism includes a sensor (20) and a sensor bracket (30). The sensor (20) is mounted on the sensor bracket (30). The sensor bracket (30) has an oblong hole. The sensor bracket (30) is fixed to the clamping mechanism by bolts in the oblong hole. It also includes a display screen (40) with indicator lights connected to the sensing sensor (20).

8. A welding fixture for a central channel longitudinal beam according to claim 1, characterized in that, The base (7) is equipped with universal pulleys at its bottom.

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