Clamping device for a welding apparatus

Abstract

This application relates to the field of clamping device technology, and in particular to a clamping device for welding equipment. The clamping device for welding equipment includes a clamping mechanism, comprising a first clamping component and a second clamping component for clamping a workpiece; a driving mechanism for driving the first clamping component and the second clamping component to move towards or away from each other; wherein the first clamping component includes at least one first clamping plate, and the second clamping component includes at least two second clamping plates spaced apart along the axial direction; in the vertical direction, the projection of the first clamping plate is located between the projections of two adjacent second clamping plates; the first clamping plate has a first clamping groove, and the second clamping plate has a second clamping groove, the first clamping groove and the second clamping groove being arranged opposite to each other; the multi-point clamping method of this application can significantly improve the stability and reliability of clamping, and is particularly suitable for clamping long tube workpieces.

Description

Technical Field

[0001] This utility model relates to the field of clamping device technology, and in particular to a clamping device for welding equipment. Background Technology

[0002] As a key tool for realizing the welding process, the performance and precision of welding equipment have a crucial impact on product quality. The clamping mechanism, as an important component of welding equipment, is primarily responsible for the stable and accurate fixing and positioning of the workpiece to be welded, ensuring the smooth progress of the welding process and the reliability of the weld quality.

[0003] For pipe welding equipment, current clamping mechanisms are typically equipped with arc-shaped clamping grooves and V-shaped clamping grooves. Arc-shaped clamping grooves, with their continuous and smooth curved surface characteristics, exhibit excellent adaptability when clamping circular or curved workpieces. They can form a large contact area with the workpiece surface, effectively dispersing clamping force and preventing workpiece deformation caused by localized stress concentration. However, due to the lack of a clear positioning reference on its curved surface, it is difficult to guarantee precise workpiece positioning in precision welding scenarios where extremely high workpiece positioning accuracy is required. This may affect the dimensional accuracy and quality consistency of the welded joint.

[0004] The V-groove, with its unique wedge-shaped structure, exhibits excellent positioning capabilities when clamping cylindrical workpieces. Two intersecting straight grooves automatically center the circular workpiece, ensuring it maintains a precise axial position during welding and significantly improving the accuracy of the weld joint. Furthermore, the included angle design of the V-groove can be optimized for different workpiece diameters, enhancing the versatility and flexibility of the clamping mechanism, leading to its widespread application in mechanical manufacturing, pipeline installation, and other fields. However, existing V-groove technologies also have limitations. When clamping long pipe fittings, the two-point contact of the V-groove alone cannot provide sufficient stability, easily causing wobbling and swaying during pipe welding, thus affecting the continuity of the weld and the quality of the weld seam. Utility Model Content

[0005] In view of the shortcomings or problems existing in the prior art, this disclosure provides a clamping device for welding equipment, which can stably clamp pipe fittings of different sizes.

[0006] The technical solution adopted by this disclosure to solve the above-mentioned technical problem is: a clamping device for welding equipment, comprising:

[0007] A clamping mechanism, including a first clamping assembly and a second clamping assembly for clamping a workpiece;

[0008] A driving mechanism is used to drive the first clamping component and the second clamping component to move towards each other or away from each other.

[0009] The first clamping assembly includes at least one first clamping plate, and the second clamping assembly includes at least two second clamping plates spaced apart along the axial direction.

[0010] In the vertical direction, the projection of the first clamping plate is located between the projections of the two adjacent second clamping plates;

[0011] The first clamping plate has a first clamping groove, and the second clamping plate has a second clamping groove, with the first clamping groove and the second clamping groove being arranged opposite to each other.

[0012] In a preferred embodiment, the sum of the number of the first clamping plate and the second clamping plate is an odd number.

[0013] In a preferred embodiment, both the first clamping groove and the second clamping groove are V-shaped grooves.

[0014] In a preferred embodiment, the driving mechanism is a bidirectional driving cylinder.

[0015] In a preferred embodiment, the bidirectional drive cylinder is a double-acting double-piston rod cylinder. The double-acting double-piston rod cylinder includes a cylinder body, in which a first piston rod and a second piston rod are disposed. The first piston rod is used to connect to a first clamping assembly, and the second piston rod is used to connect to a second clamping assembly.

[0016] In a preferred embodiment, the first clamping assembly further includes a first connecting block, a first clamping plate disposed on the first connecting block, and the first clamping plate being connected to the output end of the first piston rod through the first connecting block.

[0017] In a preferred embodiment, the second clamping assembly further includes a second connecting block, a second clamping plate disposed on the second connecting block, and the second clamping plate being connected to the output end of the second piston rod through the second connecting block.

[0018] As a preferred embodiment, it also includes a column, on which the cylinder body is mounted.

[0019] In a preferred embodiment, a drive motor is provided on the column, and the cylinder is connected to the drive shaft of the drive motor to adjust the displacement of the cylinder in the horizontal direction.

[0020] In a preferred embodiment, both the first clamping groove and the second clamping groove are provided with a protective layer; the protective layer is made of copper.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows: due to the cooperation of the first clamping component and the second clamping component, the clamping force is distributed on the workpiece through multiple clamping points. This multi-point clamping method can significantly improve the stability and reliability of clamping, and is especially suitable for clamping long tube workpieces. The clamping force is distributed on the workpiece through multiple clamping points, which reduces the risk of workpiece surface damage (such as indentation) caused by excessive clamping force at a single or two clamping points. In addition, the first clamping plate and two adjacent second clamping plates form a stable structure similar to a triangle. The first clamping plate and the two adjacent second clamping plates can provide support from different positions to ensure that the workpiece remains stable during the welding process, thereby significantly enhancing the stability of the clamping device. Attached Figure Description

[0022] Figure 1 This is one of the structural schematic diagrams of a clamping device for welding equipment according to this application;

[0023] Figure 2 This is a second schematic diagram of the structure of a clamping device for welding equipment according to this application;

[0024] Figure 3 This is one of the cross-sectional views of a clamping device for welding equipment according to this application;

[0025] Figure 4 For this application Figure 3 A magnified view of a section at point A in the middle;

[0026] Figure 5 This is one of the structural schematic diagrams of the clamping mechanism in this application;

[0027] Figure 6 This is the second schematic diagram of the clamping mechanism in this application;

[0028] Figure 7 This is a second cross-sectional view of a clamping device for welding equipment according to this application.

[0029] In the diagram: 1. Column; 2. Clamping mechanism; 3. Drive mechanism; 4. Drive motor; 5. First clamping plate; 6. Second clamping plate; 7. First piston rod; 8. Second piston rod; 9. Third connecting block; 10. Drive shaft; 11. Cylinder body; 12. First plate; 13. Second plate; 14. Third plate; 15. Fourth plate; 16. Second positioning pin; 17. Protective layer. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0031] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation of this utility model.

[0032] Please refer to Figure 1 , Figure 3 and Figure 5 As shown, this application discloses a clamping device for welding equipment, particularly suitable for clamping pipe fittings. It includes a clamping mechanism 2 and a driving mechanism 3. The clamping mechanism 2 includes a first clamping assembly and a second clamping assembly for clamping workpieces. The driving mechanism 3 drives the first clamping assembly and the second clamping assembly to move towards or away from each other, thereby clamping and releasing the workpiece. The first clamping assembly includes a first clamping plate 5, and the second clamping assembly includes two second clamping plates 6 spaced apart along the axial direction. The sum of the number of first clamping plates 5 and second clamping plates 6 is odd. In the vertical direction, the projection of the first clamping plate 5 is located between the projections of two adjacent second clamping plates 6. The first clamping plate 5 has a first clamping groove, and the second clamping plate 6 has a second clamping groove, with the first and second clamping grooves arranged opposite to each other. Due to the cooperation of the first and second clamping components, the clamping force is distributed across the workpiece through multiple clamping points. This multi-point clamping method significantly improves the stability and reliability of the clamping, and is especially suitable for clamping long tube workpieces. The distribution of the clamping force across multiple clamping points reduces the risk of surface damage (such as indentation) caused by excessive clamping force at a single or two clamping points. In addition, the first clamping plate 5 and two adjacent second clamping plates 6 form a stable triangular structure. The first clamping plate 5 and the two adjacent second clamping plates 6 can provide support from different positions, ensuring that the workpiece remains stable during welding, thereby significantly enhancing the stability of the clamping device.

[0033] It should be noted that the first clamping plate 5 and the second clamping plate 6 have the same thickness, and the distance between two adjacent second clamping plates 6 is greater than the thickness of the second clamping plate 6. Both the first clamping groove and the second clamping groove are V-shaped grooves. In the vertical direction, the projection of the first clamping plate 5 lies between the projections of two adjacent second clamping plates 6. This allows the inner side of the first clamping plate 5 to at least partially enter between the corresponding two second clamping plates 6 when clamping smaller workpieces (such as small-diameter pipes), thereby providing stable clamping for the workpiece. In other words, when clamping smaller workpieces, the first clamping plate 5 and the second clamping plate 6 will not interfere with each other. Therefore, the clamping device of this application can clamp both small and large-diameter pipes, possessing wide applicability.

[0034] In one embodiment of this disclosure, the first clamping assembly has two first clamping plates 5, which are spaced apart along the axial direction; the second clamping assembly has three second clamping plates 6, which are also spaced apart along the axial direction. In this embodiment, the total number of first clamping plates 5 and second clamping plates 6 is five. In actual production, the appropriate number of clamping plates can be selected according to the size (e.g., length) of the workpiece. It is understood that for longer workpieces, using multiple first clamping plates 5 and second clamping plates 6 will result in better stability. When the total number of clamping plates is odd, the force distribution on the workpiece is somewhat asymmetrical when the clamping device clamps the workpiece. The first clamping plate 5 and two adjacent second clamping plates 6 form a stable triangular structure, thereby generating a stable clamping force, effectively reducing the deformation and displacement of the workpiece during welding, and thus reducing the probability of welding defects.

[0035] Please continue reading. Figure 5 As shown, in order to ensure the coaxiality of the multiple first clamping plates 5 (second clamping plates 6) arranged axially, at least one first positioning pin is provided between two adjacent first clamping plates 5, and at least one second positioning pin 16 is provided between two adjacent second clamping plates 6.

[0036] like Figures 5-7 As shown, in one embodiment of this disclosure, the driving mechanism 3 is a bidirectional driving cylinder. Preferably, the bidirectional driving cylinder is a double-acting double-piston rod cylinder. The double-acting double-piston rod cylinder includes a cylinder body 11, within which a first piston rod 7 and a second piston rod 8 are disposed. The first piston rod 7 is used to connect to a first clamping assembly, and the second piston rod 8 is used to connect to a second clamping assembly. The first piston rod 7 and the second piston rod 8 extend or retract synchronously and at the same speed under air pressure, eliminating any risk of asynchrony caused by electrical or control delays, and preventing the workpiece from being pushed or pulled skewed during clamping. The working principle of the bidirectional driving cylinder is prior art and will not be described in detail here.

[0037] The first clamping assembly also includes a first connecting block, on which a first clamping plate 5 is disposed. The first clamping plate 5 is connected to the output end of the first piston rod 7 via the first connecting block. Specifically, the first connecting block includes a vertically arranged first plate 12 and a second plate 13. The first plate 12 has a through hole for the first piston rod 7 to pass through. The second plate 13 is bolted to the first plate 12. The first clamping plate 5 is bolted to the outside of the second plate 13, thus enabling the first clamping plate 5 to move synchronously with the first piston rod 7.

[0038] The second clamping assembly also includes a second connecting block. A second clamping plate 6 is disposed on the second connecting block and is connected to the output end of the second piston rod 8 via the second connecting block. Specifically, the second connecting block includes a vertically arranged third plate 14 and a fourth plate 15. The third plate 14 has a through hole for the second piston rod 8 to pass through. The fourth plate 15 is bolted to the third plate 14, and the second clamping plate 6 is bolted to the outside of the fourth plate 15. In this way, the second clamping plate 6 can move synchronously with the second piston rod 8.

[0039] Please refer to Figures 1-4 As shown, in one embodiment of this disclosure, a column 1 is also included, and a cylinder 11 is mounted on the column 1. A drive motor 4 is mounted on the column 1, and the cylinder 11 is connected to the drive shaft 10 of the drive motor 4 for adjusting the horizontal displacement of the cylinder 11. Specifically, a third connecting block 9 is connected to the rear of the cylinder 11, and the third connecting block 9 is connected to the drive shaft 10 of the motor. When the clamping position changes (such as when welding different types of workpieces), it is not necessary to disassemble the entire fixture. The horizontal position of the cylinder 11 (and the entire clamping mechanism 2) on the column 1 can be quickly adjusted by the drive motor 4, so that the clamping point is accurately aligned with the key support part of the workpiece. In addition, by adjusting the horizontal movement of the cylinder 11, the clamping mechanism 2 can actively avoid the welding path or surrounding tooling, avoiding collision between the welding torch / welding torch and the fixture.

[0040] like Figure 6 As shown, preferably, both the first and second clamping slots are provided with a protective layer 17; the protective layer 17 is made of copper. Copper is a relatively soft metal that will not scratch the surface of the workpiece when in contact with it, thereby effectively reducing scratches or damage caused by friction between the clamping device and the workpiece. In addition, copper has good thermal conductivity, which can quickly conduct the heat generated during welding away, thereby reducing the deformation of the workpiece caused by local overheating at the clamping location.

[0041] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A clamping device for a welding apparatus, characterized by, include: The clamping mechanism (2) includes a first clamping assembly and a second clamping assembly for clamping the workpiece; The driving mechanism (3) is used to drive the first clamping component and the second clamping component to move towards each other or away from each other. The first clamping assembly includes at least one first clamping plate (5), and the second clamping assembly includes at least two second clamping plates (6) spaced apart along the axial direction. In the vertical direction, the projection of the first clamping plate (5) is located between the projections of the two adjacent second clamping plates (6); The first clamping plate (5) has a first clamping groove, and the second clamping plate (6) has a second clamping groove. The first clamping groove and the second clamping groove are arranged opposite to each other.

2. The clamping device for welding apparatus according to claim 1, characterized by The sum of the number of the first clamping plate (5) and the second clamping plate (6) is an odd number.

3. The clamping device for welding apparatus according to claim 1, characterized by Both the first clamping groove and the second clamping groove are V-shaped grooves.

4. The clamping device for welding apparatus according to claim 1, characterized by The drive mechanism (3) is a bidirectional drive cylinder.

5. The clamping device for welding equipment according to claim 4, characterized in that, The bidirectional drive cylinder is a double-acting double-piston rod cylinder. The double-acting double-piston rod cylinder includes a cylinder body (11). A first piston rod (7) and a second piston rod (8) are provided inside the cylinder body (11). The first piston rod (7) is used to connect to a first clamping assembly, and the second piston rod (8) is used to connect to a second clamping assembly.

6. The clamping device for welding equipment according to claim 5, characterized in that, The first clamping assembly also includes a first connecting block, and a first clamping plate (5) is disposed on the first connecting block. The first clamping plate (5) is connected to the output end of the first piston rod (7) through the first connecting block.

7. The clamping device for welding equipment according to claim 5, characterized by The second clamping assembly also includes a second connecting block, and a second clamping plate (6) is disposed on the second connecting block. The second clamping plate (6) is connected to the output end of the second piston rod (8) through the second connecting block.

8. The clamping device for welding equipment according to claim 5, characterized by It also includes a column (1) and a cylinder body (11) mounted on the column (1).

9. The clamping device for welding equipment according to claim 8, characterized in that, The column (1) is equipped with a drive motor (4), and the cylinder (11) is connected to the drive shaft (10) of the drive motor (4) for adjusting the displacement of the cylinder (11) in the horizontal direction.

10. The clamping device for welding apparatus according to claim 1, characterized by Both the first clamping groove and the second clamping groove are provided with a protective layer (17); the protective layer (17) is made of copper.

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