Clamping fixture

Abstract

This utility model relates to the field of welding equipment technology and discloses a clamping fixture. The clamping fixture includes a base and multiple first fixing units, multiple second fixing units, and multiple third fixing units mounted on the base. The base has a first side and a second side, and a third side and a fourth side, arranged opposite to each other. Multiple first fixing units are spaced apart in the middle of the base and can clamp the workpiece to be welded via a first bearing member and a first abutment member. Multiple second fixing units are spaced apart on the first side and the second side of the base and can clamp the workpiece to be welded via a second bearing member and a second abutment member. Multiple third fixing units are spaced apart on the third side and the fourth side of the base and can clamp the workpiece to be welded via a third bearing member and a third abutment member. The clamping fixture provides positioning relative to manual spot welding, increasing positioning accuracy and improving production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment technology, and specifically to a clamping fixture. Background Technology

[0002] In actual production, some raw materials require specially made iron boxes for storage. Each of these boxes needs at least four supporting frames, and each frame requires manual welding. Traditional welding methods involve welding multiple round steel rod-shaped structures onto a flat steel body. This necessitates initial assembly and spot welding for positioning, followed by additional reinforcement welding. However, in practical applications, the positioning accuracy of this assembly and spot welding method is poor, and its efficiency is relatively low. Therefore, there is an urgent need for a positioning tool compatible with the supporting frames to assist in their welding. Utility Model Content

[0003] The purpose of this invention is to overcome the problems of poor positioning accuracy and relatively low efficiency in existing positioning methods for spot welding assembly. This invention provides a clamping fixture comprising a base and multiple first fixing units, multiple second fixing units, and multiple third fixing units mounted on the base. This clamping fixture can clamp and position the workpiece to be welded through the multiple first fixing units, multiple second fixing units, and multiple third fixing units, thereby increasing positioning accuracy and improving production efficiency.

[0004] To achieve the above objectives, this utility model provides a clamping fixture for clamping a workpiece to be welded, the clamping fixture comprising:

[0005] The base has a first side and a second side disposed opposite to each other along a first direction, and a third side and a fourth side disposed opposite to each other along a second direction;

[0006] Multiple first fixing units are spaced apart in the middle of the base. Each first fixing unit includes a mounting plate adjustablely mounted on the base, a first bearing member and a first abutting member mounted on the mounting plate at relative intervals along the first direction, and the first abutting member is configured to have a travel of moving closer to and further away from the corresponding first abutting member.

[0007] A plurality of second fixing units are spaced apart on the first side and the second side of the base. Each second fixing unit includes a second support member and a second abutment member spaced apart from each other along the first direction. The second abutment members are configured to have a travel distance from and towards their corresponding second abutment members, and the second support members are adjustablely mounted on the base along the first direction.

[0008] Multiple third fixing units are spaced apart on the third side and the fourth side of the base. Each third fixing unit includes a third bearing member and a third abutting member that are spaced apart from each other along the second direction. The third abutting member is configured to have a travel distance from the corresponding third abutting member, and the third bearing member is adjustablely mounted on the base along the second direction.

[0009] The first direction and the second direction are arranged to intersect.

[0010] Preferably, the clamping fixture further includes a plurality of mounting holes formed in the base and a plurality of mounting bolts corresponding one-to-one with the plurality of mounting holes;

[0011] The mounting plate is provided with an elongated mounting hole adapted to the mounting bolt, so that the bolt can pass through the elongated mounting hole and be screwed into the corresponding mounting hole, and the nut of the mounting bolt abuts against the mounting plate.

[0012] Preferably, the mounting elongated hole includes a first elongated hole extending longitudinally along the first direction and a second elongated hole extending longitudinally along the second direction, and the ends of the first elongated hole and the second elongated hole intersect and communicate with each other; and / or

[0013] The mounting holes are evenly spaced at the center of the base.

[0014] Preferably, the first support member, the second support member, and the third support member each include a support portion mounted on the base and an abutting portion extending upward from one end of the support portion.

[0015] Preferably, a through groove is provided at the connection between the bearing portion and the abutting portion.

[0016] Preferably, the sidewall of the through groove away from the abutting portion is deflected from bottom to top in a direction away from the abutting portion.

[0017] Preferably, the first support member, the second support member, and the third support member are all plate-shaped structures, and the first support member is smaller in volume than the second support member and the third support member.

[0018] Preferably, the clamping fixture further includes a plurality of receiving seats spaced apart along the first direction, each of the receiving seats having a mounting groove for mounting the round steel connecting rod in the workpiece to be welded, the mounting groove being through the first direction.

[0019] Preferably, the receiving seat is mounted on the mounting plate;

[0020] The clamping fixture also includes a third elongated hole provided on the base. The third elongated hole extends longitudinally along the first direction and is arranged opposite to the round steel connecting rod in the workpiece to be welded in the vertical direction.

[0021] Preferably, the first abutting member, the second abutting member, and the third abutting member are all cylinders;

[0022] Each of the mounting plates is provided with a mounting area for mounting the cylinder and a first through-hole in the mounting area, and the base is provided with a plurality of second through-holes relative to the plurality of first through-holes.

[0023] Through the above technical solution, the present invention has at least the following beneficial effects:

[0024] (1) The clamping fixture includes the base and a plurality of first fixing units, a plurality of second fixing units, and a plurality of third fixing units mounted on the base. The clamping fixture can clamp and position the workpiece to be welded through the plurality of first fixing units, the plurality of second fixing units, and the plurality of third fixing units. The clamping fixture has a large number of fixing units, and can not only clamp the periphery of the workpiece to be welded through the second fixing units and the third fixing units, but also clamp the central structure of the workpiece to be welded through the first fixing units. Therefore, the positioning accuracy of the clamping fixture is higher than that of traditional spot welding positioning, and the positioning efficiency is also higher.

[0025] (2) The clamping fixture has a large number of fixing units, which can clamp not only the periphery of the workpiece to be welded through the second and third fixing units, but also the central structure of the workpiece to be welded through the first fixing unit. Unlike traditional clamping fixtures, the first, second, and third fixing units are equipped with not only abutting members, but also bearing members, which can support the workpiece to be welded. Therefore, the workpiece to be welded is not placed directly on the base, but is suspended on the abutting members, reducing the interference of the base on subsequent welding, thereby facilitating the subsequent welding by workers or automatic welding machines.

[0026] (3) In the first fixing unit, the second fixing unit, and the third fixing unit, the clamping members are all configured to have a travel distance that moves towards and away from the corresponding carrier members, and each carrier member is configured to be adjustablely mounted on the base. Therefore, the clamping fixture can adjust the mounting position of each carrier member so that each carrier member can carry the workpieces to be welded of different sizes and structures, thereby allowing the clamping fixture to meet more usage requirements. Attached Figure Description

[0027] Figure 1This is a schematic diagram of the structure of an embodiment of the clamping fixture proposed in this utility model when positioning the workpiece to be welded;

[0028] Figure 2 yes Figure 1 Schematic diagram of the clamping fixture;

[0029] Figure 3 yes Figure 1 A top view of the central base;

[0030] Figure 4 yes Figure 1 A top view of the first fixed unit;

[0031] Figure 5 yes Figure 4 Top view of the mounting plate;

[0032] Figure 6 yes Figure 1 Side views of two embodiments of the first, second, and third carriers of the clamping fixture.

[0033] Explanation of reference numerals in the attached figures

[0034] Detailed Implementation

[0035] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0036] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0037] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of technical features indicated. Therefore, unless otherwise stated, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. The term "comprising" and any variations thereof mean non-exclusive inclusion, where one or more other features, integers, steps, operations, units, components, and / or combinations thereof may be present or added.

[0038] In addition, terms such as “center,” “horizontal,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” that indicate orientation or positional relationship are based on the orientation or relative positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0039] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] In actual production, some raw materials require specially made iron boxes for storage. Each of these boxes needs at least four supporting frames, and each frame requires manual welding. Traditional welding methods involve welding multiple round steel rod-shaped structures onto a flat steel body. This necessitates initial assembly and spot welding for positioning, followed by additional reinforcement welding. However, in practical applications, the positioning accuracy of this assembly and spot welding method is poor, and its efficiency is relatively low. Therefore, there is an urgent need for a positioning tool compatible with the supporting frames to assist in their welding.

[0041] In view of this, the present invention proposes a clamping fixture 100 for clamping a workpiece 200 to be welded. The clamping fixture 100 includes a base 1 and multiple first fixing units 2, multiple second fixing units 3, and multiple third fixing units 4 mounted on the base 1. The clamping fixture 100 can clamp and position the workpiece 200 to be welded through the multiple first fixing units 2, multiple second fixing units 3, and multiple third fixing units 4, thereby increasing positioning accuracy and improving production efficiency. Figures 1 to 6 This is a schematic diagram of an embodiment of the clamping fixture 100 proposed in this utility model.

[0042] The clamping fixture 100 of this utility model will be further illustrated below through embodiments. These embodiments are implemented based on the technical solution of this utility model, providing detailed implementation methods and specific operating procedures. However, the scope of protection of this utility model is not limited to the following embodiments.

[0043] Please see Figures 1 to 2The clamping fixture 100 proposed in this utility model includes a base 1, a plurality of first fixing units 2, a plurality of second fixing units 3, and a plurality of third fixing units 4. The base 1 has a first side 1a and a second side 1b arranged opposite each other along a first direction X, and a third side 1c and a fourth side 1d arranged opposite each other along a second direction Y. The plurality of first fixing units 2 are spaced apart in the middle of the base 1. Each first fixing unit 2 includes a mounting plate 23 adjustablely mounted on the base 1, a first bearing member 22 and a first abutting member 21 spaced apart from each other along the first direction X on the mounting plate 23, and the first abutting member 21 is configured to have a travel distance towards and away from the corresponding first abutting member 21. The plurality of second fixing units 3 are spaced apart on the first side 1a and the second side 1b of the base 1. Each second fixing unit 3 includes a second bearing member spaced apart from each other along the first direction X. The base 1 includes a second bearing member 32 and a second abutting member 31, the second abutting member 31 being configured to have a travel distance from and to the corresponding second abutting member 31, and the second bearing member 32 being adjustablely mounted on the base 1 along the first direction X; a plurality of third fixing units 4 are spaced apart on the third side 1c and the fourth side 1d of the base 1, each third fixing unit 4 including a third bearing member 42 and a third abutting member 41 spaced apart along the second direction Y, the third abutting member 41 being configured to have a travel distance from and to the corresponding third abutting member 41, and the third bearing member 42 being adjustablely mounted on the base 1 along the second direction Y; wherein the first direction X and the second direction Y are intersecting.

[0044] In this application, the first direction X is actually the relative direction between the first side 1a and the second side 1b, and the second direction Y is actually the relative direction between the third side 1c and the fourth side 1d. The first direction X and the second direction Y are different and intersecting directions.

[0045] In the technical solution of this application, the clamping fixture 100 includes a base 1 and a plurality of first fixing units 2, a plurality of second fixing units 3, and a plurality of third fixing units 4 installed on the base 1. The clamping fixture 100 can clamp and position the workpiece 200 to be welded through the plurality of first fixing units 2, the plurality of second fixing units 3, and the plurality of third fixing units 4. The clamping fixture 100 has a large number of fixing units, and can not only clamp the periphery of the workpiece 200 to be welded through the second fixing units 3 and the third fixing units 4, but also clamp the central structure of the workpiece 200 to be welded through the first fixing units 2. Therefore, the positioning accuracy of the clamping fixture 100 is higher than that of traditional spot welding positioning, and the positioning efficiency is also higher.

[0046] The clamping fixture 100 has a large number of fixing units, which can clamp not only the periphery of the workpiece 200 to be welded through the second fixing unit 3 and the third fixing unit 4, but also the central structure of the workpiece 200 to be welded through the first fixing unit 2. Unlike traditional clamping fixtures 100, the first fixing unit 2, the second fixing unit 3, and the third fixing unit 4 are provided with not only abutting members, but also bearing members, which can support the workpiece 200 to be welded. Therefore, the workpiece 200 to be welded is not placed directly on the base 1, but is suspended on the abutting members, reducing the interference of the base 1 on subsequent welding, thereby facilitating the subsequent welding by workers or automatic welding machines.

[0047] In the first fixing unit 2, the second fixing unit 3, and the third fixing unit 4, the clamping members are all configured to have a travel distance that moves towards and away from the corresponding carrier member, and each carrier member is configured to be adjustablely mounted on the base 1. Therefore, the clamping fixture 100 can adjust the mounting position of each carrier member so that each carrier member can support the workpieces 200 to be welded of different sizes and structures, thereby allowing the clamping fixture 100 to meet more usage requirements.

[0048] Specifically, please refer to Figures 2 to 5 The clamping fixture 100 further includes a plurality of mounting holes 11 formed in the base 1 and a plurality of mounting bolts 101 corresponding to the plurality of mounting holes 11; the mounting plate 23 is provided with mounting elongated holes 231 adapted to the mounting bolts 101, so that the screw of the mounting bolt 101 can pass through the mounting elongated holes 231 and be screwed into the corresponding mounting holes 11, and the nut of the mounting bolt 101 abuts against the mounting plate 23.

[0049] When the clamping fixture 100 clamps different workpieces 200 to be welded, the first bearing member 22 and the first abutment member 21 need to be adjusted in their installation positions accordingly. In this embodiment, the screw connection position between the mounting bolt 101 and the mounting hole 11 remains unchanged, but the mounting plate 23 can move relative to the mounting bolt 101 through the mounting elongated hole 231. Therefore, the mounting plate 23 can adjust its relative position to the mounting hole 11 through the mounting elongated hole 231, thereby changing the installation position of the first bearing member 22 and the first abutment member 21. This allows the clamping fixture 100 to position and clamp different workpieces 200 to be welded, making it more versatile and able to meet a wider range of usage needs.

[0050] Furthermore, the mounting elongated hole 231 includes a first elongated hole extending longitudinally along the first direction X and a second elongated hole extending longitudinally along the second direction Y, and the ends of the first elongated hole and the second elongated hole intersect and communicate with each other.

[0051] The first elongated hole extends longitudinally along the first direction X, and the second elongated hole extends longitudinally along the second direction Y. Therefore, the mounting plate 23 can move relative to the mounting hole 11 in the first direction X and the second direction Y, thereby allowing the mounting plate 23 to have a higher degree of freedom in installation on the base 1. The positional freedom of the first bearing member 22 and the first clamping member 21 is also higher. Therefore, the clamping fixture 100 will have a wider adaptability to the workpiece 200 to be welded.

[0052] In another embodiment, a plurality of mounting holes 11 are evenly spaced at the center of the base 1. The plurality of mounting holes 11 allows each mounting plate 23 to have multiple mounting points within a certain range, which also increases the degree of freedom of mounting the mounting plate 23 on the base 1, and correspondingly improves the positional freedom of the first bearing member 22 and the first abutment member 21. In fact, both evenly spaced mounting holes 11 and dividing the elongated mounting holes 231 into the first elongated hole and the second elongated hole increase the adaptability of the clamping fixture 100 to the workpiece 200 to be welded, and these two implementations do not conflict. Therefore, the clamping fixture 100 can selectively adopt one of these implementations, or it can use both implementations simultaneously.

[0053] Specifically, please refer to Figure 6 The first support member 22, the second support member 32, and the third support member 42 each include a support portion mounted on the base 1 and an abutment portion 103 extending upward from one end of the support portion. Each support portion can support a corresponding part of the workpiece 200 to be welded, and when the abutment moves toward the support member, each abutment and its corresponding abutment portion 103 can clamp the workpiece 200 to be welded. The first support member 22, the second support member 32, and the third support member 42 allow the workpiece 200 to be welded to be suspended in the air through their respective support portions, reducing the interference of the base 1 on subsequent welding, and can also clamp the workpiece 200 to be welded through their respective abutment portions 103 cooperating with the corresponding abutment.

[0054] Furthermore, a through groove 1021 is provided at the connection between the supporting portion and the abutting portion 103. When the abutting member approaches the corresponding supporting portion, it pushes the workpiece 200 to be welded into the corresponding through groove 1021, making the position of the workpiece 200 to be welded more precise. The side wall of the through groove 1021 away from the abutting member is actually the side wall of the abutting portion 103, so the through groove 1021 will not affect the clamping of the workpiece 200 to be welded by the abutting member and the abutting portion 103. In this embodiment, the supporting portion provides a more accurate installation position for the workpiece 200 to be welded through the through groove 1021, making the positioning of the workpiece 200 to be welded by the clamping fixture 100 more accurate.

[0055] Furthermore, the sidewall of the through groove 1021 away from the abutment portion 103 is inclined from bottom to top in a direction away from the abutment portion 103. By setting the inclined sidewall, the through groove 1021 enlarges its opening, which allows the workpiece 200 to enter the through groove 1021 more easily and smoothly, avoiding damage to the workpiece 200 when the clamping member pushes against it.

[0056] Specifically, the first support member 22, the second support member 32 and the third support member 42 are all plate-shaped structures, and the first support member 22 is smaller in volume than the second support member 32 and the third support member 42.

[0057] The clamping fixture 100 contacts the workpiece 200 to be welded through a plate-like structure, resulting in a small contact area between the first support member 22, the second support member 32, and the third support member 42 and the workpiece 200. Therefore, the interference of the first support member 22, the second support member 32, and the third support member 42 on the subsequent welding of the workpiece 200 is minimal. The first fixing unit 2 is located in the middle of the base 1, so the first support member 22 needs to support the middle of the workpiece 200 to be welded. In most cases, the structure of the middle part of the workpiece 200 to be welded is relatively complex. Therefore, the clamping fixture 100 avoids interference between the first support member 22 and the middle part of the workpiece 200 by reducing the volume of the first support member 22.

[0058] Please see Figures 1 to 2In the actual application scenario of the clamping fixture 100 proposed in this utility model, the workpiece 200 to be welded includes a flat steel body 210 and multiple round steel connecting rods 220 that need to be welded together. Therefore, in one embodiment of this utility model, the clamping fixture 100 further includes multiple receiving seats 5 spaced apart along the first direction X. Each receiving seat 5 is provided with a mounting groove 51 for mounting the round steel connecting rods 220 in the workpiece 200 to be welded, and the mounting groove 51 is through along the first direction X. The multiple receiving seats 5 spaced apart along the first direction X form a group of receiving seats 5. Each group of receiving seats 5 is used to support different parts of the corresponding round steel connecting rods 220. When the workpiece 200 to be welded has multiple round steel connecting rods 220, the clamping fixture 100 can support multiple round steel connecting rods 220 respectively by setting multiple groups of receiving seats 5, thereby positioning the multiple round steel connecting rods 220 and making the subsequent welding of the flat steel body 210 and the multiple round steel connecting rods 220 smoother.

[0059] Please see Figure 1 and Figure 3 In practical applications, when the round steel connecting rod 220 is welded to the flat steel body 210, a certain amount of welding slag will inevitably be produced at the welding position. This welding slag will fall and accumulate on the base 1. When the welding slag accumulates to a certain extent, it may affect the subsequent use of the clamping fixture 100. Therefore, in one embodiment of this utility model, the receiving seat 5 is installed on the mounting plate 23; the clamping fixture 100 also includes a third elongated hole 12 provided in the base 1. The third elongated hole 12 extends longitudinally along the first direction X, and the third elongated hole 12 is arranged opposite to the round steel connecting rod 220 in the workpiece 200 to be welded in the vertical direction. Each receiving seat 5 is provided in the gap between the connection between the round steel connecting rod 220 and the flat steel body 210, thereby avoiding the falling of welding slag. In this embodiment, the receiving seat 5 is mounted on the base 1 via the mounting plate 23. The base 1 is also provided with the third elongated hole 12 that is opposite to the round steel connecting rod 220 in the vertical direction, so that the welding slag will pass through the third elongated hole 12, avoid the base 1 and fall to the ground, thus eliminating the influence of the welding slag on the subsequent work of the clamping fixture 100.

[0060] Specifically, please refer to Figures 2 to 5 The first clamping member 21, the second clamping member 31 and the third clamping member 41 are all cylinders; each of the mounting plates 23 is provided with a mounting area for mounting the cylinder and a first through port 232 provided in the mounting area, and the base 1 is provided with a plurality of second through ports 13 relative to the plurality of first through ports 232.

[0061] It should be noted that the cylinder is only one embodiment of the first clamping member 21, the second clamping member 31, and the third clamping member 41. The first clamping member 21, the second clamping member 31, and the third clamping member 41 can also be electric cylinders or linear motors, etc. When the first clamping member 21, the second clamping member 31, and the third clamping member 41 are all cylinders, the second clamping member 31 and the third clamping member 41 are located on the periphery of the base 1, so the air pipe of the cylinder can be easily connected to the cylinder. The first clamping member 21 is located in the middle of the base 1, and the connection between the air pipe of the cylinder and the cylinder will be affected by external interference. Therefore, the mounting plate 23 is provided with the first through-hole 232, and the base 1 is provided with the second through-hole 13 corresponding to the first through-hole 232, so that the air pipe of the first clamping member 21 can be connected to the bottom of the cylinder through the second through-hole 13 and the first through-hole 232 in sequence, avoiding external restrictions on the air pipe.

[0062] The preferred embodiments of this utility model have been described in detail above; however, this utility model is not limited thereto. Within the scope of the technical concept of this utility model, various simple modifications can be made to the technical solution of this utility model, including combining the various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed by this utility model and are all within the protection scope of this utility model.

Claims

1. A clamping tool (100) for clamping a workpiece (200) to be welded, characterized in that The clamping fixture (100) includes: The base (1) has a first side (1a) and a second side (1b) disposed opposite to each other along a first direction (X), and a third side (1c) and a fourth side (1d) disposed opposite to each other along a second direction (Y). Multiple first fixing units (2) are spaced apart in the middle of the base (1). Each first fixing unit (2) includes a mounting plate (23) adjustablely mounted on the base (1), a first support member (22) and a first abutment member (21) mounted on the mounting plate (23) at relative intervals along the first direction (X). The first abutment member (21) is configured to have a travel of moving closer to and further away from the corresponding first abutment member (21). A plurality of second fixing units (3) are spaced apart on the first side (1a) and the second side (1b) of the base (1). Each second fixing unit (3) includes a second support member (32) and a second abutment member (31) spaced apart along the first direction (X). The second abutment member (31) is configured to have a travel toward and away from the corresponding second abutment member (31), and the second support member (32) is adjustablely mounted on the base (1) along the first direction (X). Multiple third fixing units (4) are spaced apart on the third side (1c) and the fourth side (1d) of the base (1). Each third fixing unit (4) includes a third support member (42) and a third abutment member (41) spaced apart along the second direction (Y). The third abutment member (41) is configured to have a travel of moving closer to and further away from the corresponding third abutment member (41). The third support member (42) is adjustablely mounted on the base (1) along the second direction (Y). The first direction (X) and the second direction (Y) are arranged to intersect.

2. The clamping tool (100) according to claim 1, characterized in that It also includes a plurality of mounting holes (11) formed in the base (1) and a plurality of mounting bolts (101) corresponding one-to-one with the plurality of mounting holes (11). The mounting plate (23) is provided with an elongated mounting hole (231) adapted to the mounting bolt (101) so that the screw of the mounting bolt (101) can pass through the elongated mounting hole (231) and be screwed into the corresponding mounting hole (11), and the nut of the mounting bolt (101) abuts against the mounting plate (23).

3. The clamping tool (100) according to claim 2, characterized in that The mounting elongated hole (231) includes a first elongated hole extending longitudinally along the first direction (X) and a second elongated hole extending longitudinally along the second direction (Y), wherein the ends of the first elongated hole and the second elongated hole intersect and communicate with each other; and / or Multiple mounting holes (11) are evenly spaced at the center of the base (1).

4. The clamping tool (100) according to any one of claims 1 to 3, characterized in that The first support member (22), the second support member (32) and the third support member (42) each include a support portion installed on the base (1) and an abutment portion (103) extending upward from one end of the support portion.

5. The clamping tool (100) according to claim 4, characterized in that A through groove (1021) is provided at the connection between the bearing part and the abutting part (103).

6. The clamping tool (100) according to claim 5, characterized in that The sidewall of the through groove (1021) away from the abutting portion (103) is deflected from bottom to top in a direction away from the abutting portion (103).

7. The clamping fixture (100) of claim 1, wherein The first support member (22), the second support member (32) and the third support member (42) are all plate-shaped structures, and the first support member (22) is smaller in volume than the second support member (32) and the third support member (42).

8. The clamping fixture (100) of claim 1, wherein, It also includes a plurality of receiving seats (5) spaced apart along the first direction (X), each of the receiving seats (5) having a mounting groove (51) for mounting the round steel connecting rod (220) in the workpiece to be welded (200), the mounting groove (51) being through along the first direction (X).

9. The clamping tool (100) according to claim 8, characterized in that The receiving seat (5) is installed on the mounting plate (23); The clamping fixture (100) also includes a third elongated hole (12) provided on the base (1), the third elongated hole (12) extends longitudinally along the first direction (X), and the third elongated hole (12) is arranged opposite to the round steel connecting rod (220) in the workpiece to be welded (200) in the up-down direction.

10. The clamping tool (100) according to claim 1, characterized in that The first abutment (21), the second abutment (31) and the third abutment (41) are all cylinders; Each of the mounting plates (23) is provided with a mounting area for mounting the cylinder and a first through port (232) provided in the mounting area. The base (1) is provided with a plurality of second through ports (13) relative to the plurality of first through ports (232).

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