A thin plate welding fixture and use method thereof

Abstract

The present invention discloses a thin plate welding fixture, including a positioning frame, a fixing frame, a lifting device and a pressing bracket. The welding vertical plates can be clamped toward each other by two groups of positioning frames, and then the welding horizontal plate is placed on the top of the positioning frame and the positions of the welding horizontal plate and the welding vertical plate are adjusted, and the lifting device is controlled to press the pressing bracket against the surface of the welding horizontal plate, and the pressing round head is close to the actual heat-affected zone of the welding weld, and the pressing round head is pressed against the surface of the welding horizontal plate to form a point contact, and each pressing bracket is controlled by a lifting device separately, so that the pressure of each pressing bracket on the surface of the welding horizontal plate can be controlled separately, so as to keep the force of the welding horizontal plate uniform, and then ensure the force balance of the welding horizontal plate to prevent the welding horizontal plate from deforming. There is point contact between the pressing bracket and the welding horizontal plate, and the welding gun is welded through the upper surface of the welding horizontal plate toward the welding vertical plate, so that welding is convenient and the activity space is wider.

Description

Technical Field

[0001] The invention relates to the field of clamps, in particular to a thin plate welding tooling clamp. Background Art

[0002] Welding technology is one of the key technologies in the engineering manufacturing process. The application fields of welded structures cover many fields such as machinery, shipbuilding, military industry, petrochemical industry, etc. There are various forms of welded joints. Among them, the stress state of the T-type structure welding process is complex, which is easy to produce welding deformation and affect the mechanical properties of the joint. The traditional welded T-type structure adopts a double-sided fillet welding method, that is, the welding horizontal plate is placed on the ground, and then the welding vertical plate is placed on the welding horizontal plate by hand or clamps for pressing, and then the joint is welded by double-sided fillet welding. This welding method is suitable for thicker plates and structures with unrestricted positions. In the manufacture of precision structures, welding thin plate T-type requires higher shape control of the structure. The welding horizontal plate is thin and will melt through if it is not careful, and the deformation is not easy to control. After welding, the welding horizontal plate is prone to bending and perforation. Especially for thin plates with an "I"-shaped structure (that is, two welding horizontal plates are welded on both sides of the welding vertical plate), the distance between the two welding horizontal plates is small, so welding is more difficult, and the traditional method will no longer be applicable. Summary of the invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a thin plate welding fixture that can effectively clamp the thin plate so that the thin plate is more evenly stressed and can control the welding deformation of the thin plate without interfering with the welding gun.

[0004] The technical solution adopted by the present invention to solve the problem is: a thin plate welding fixture, comprising:

[0005] Two sets of positioning frames, which are arranged facing each other and are used to clamp and weld vertical plates;

[0006] Two groups of fixing frames are arranged relatively above the positioning frame, and a plurality of lifting devices are arranged on the fixing frames, and a pressing bracket is arranged on the lifting device. The front end of the pressing bracket is provided with a first pressure rod located between the two groups of fixing frames, and the end of the first pressure rod is provided with a clamping round head for abutting against the upper surface of the welding horizontal plate, and a pressure sensor is arranged on the clamping round head, and the rear end of the pressing bracket is provided with a second pressure rod for pressing against the surface of the welding horizontal plate.

[0007] As a further improvement of the above technical solution, the positioning frame includes a first fixing plate, a second fixing plate is arranged above the first fixing plate, and a spring is arranged between the first fixing plate and the second fixing plate.

[0008] As a further improvement of the above technical solution, the spring is detachably arranged between the first fixing plate and the second fixing plate.

[0009] As a further improvement of the above technical solution, the first pressure rod and the second pressure rod are both oblique rods, and the first pressure rod and the second pressure rod are symmetrical along the middle of the pressing bracket.

[0010] As a further improvement of the above technical solution, the angle between the first pressure rod and the horizontal plane is 45 degrees.

[0011] As a further improvement of the above technical solution, the fixing frame is a mounting rod, and the lifting device is arranged in the mounting rod along the length direction.

[0012] As a further improvement of the above technical solution, the lifting device is a nitrogen spring, an air pipe is provided at the end of the nitrogen spring, and the air pipe is arranged in the mounting rod.

[0013] As a further improvement of the above technical solution, the lifting device is a hydraulic cylinder.

[0014] As a further improvement of the above technical solution, the distance between two adjacent lifting devices is 10-20 cm.

[0015] A method for applying the above-mentioned thin plate welding fixture, the method steps are as follows:

[0016] 1). Place the welding vertical plate between two sets of positioning frames and adjust the distance and height of the positioning frames to clamp the welding vertical plate;

[0017] 2). Place the welding horizontal plate on the upper surface of the two sets of positioning frames;

[0018] 3). Fix the two sets of fixing frames above the welding horizontal plate, and adjust the lifting device so that the pressing round head and the end of the second pressing rod are pressed against the upper surface of the welding horizontal plate. The pressing round heads on the two sets of fixing frames are respectively located on both sides of the heat affected zone of the actual welding weld of the welding horizontal plate;

[0019] 4). Adjust the lifting device to drive the pressure bracket to press the welding cross plate and make the pressure feedback from the pressure sensor reach the specified value;

[0020] 5). Place the welding gun through the upper surface of the welding cross plate and weld downward.

[0021] The beneficial effects of the present invention are as follows: the welding vertical plates can be clamped toward each other by two groups of positioning frames, the welding cross plates can be placed on the top of the two groups of positioning frames, and the positions of the welding cross plates and the welding vertical plates can be adjusted on the positioning frames. After the positions are adjusted, the two groups of fixing frames are placed above the welding cross plates and fixed, and the initial position of the pressing bracket is adjusted by the lifting device on the fixing frame so that the pressing round head and the end of the second pressure rod are pressed against the upper surface of the welding cross plate. The stability of the position of the welding cross plate can be ensured by pressing at two points, and the pressing round head is close to the position where welding is required, that is, the actual heat affected zone of the welding weld. Since the pressing round head is a sphere, point contact is formed, and several pressing round heads on the two groups of fixing frames press the welding cross plates along both sides of the actual heat affected zone of the welding weld, thereby ensuring the stability and uniform force of the welding cross plate, and each pressing bracket is controlled by a separate lifting device, so that it can be independently The pressure of each pressure support on the surface of the welding horizontal plate is controlled. The pressure sensor can timely feedback the pressure of the welding horizontal plate, so as to facilitate adjustment. When the welding horizontal plate is deformed due to welding, the pressure sensor will timely feedback the pressure signal, so as to change the pressure and offset the deformation of the welding horizontal plate to prevent the welding horizontal plate from deforming. During welding, the welding horizontal plate and the welding vertical plate are installed on the fixture, and then the welding gun melts and welds the welding horizontal plate through the upper surface of the welding horizontal plate, so that the welding horizontal plate and the welding vertical plate are welded together. Since the welding is welded through the outer side of the welding horizontal plate toward the welding vertical plate, it is not easy to melt through, and the welding horizontal plate is positioned by the pressing round head and the top of the positioning frame. When the welding horizontal plate is deformed, the pressure is fed back to the lifting device through the pressure sensor to adjust the pressure of the pressure support on the welding horizontal plate, so as to offset the deformation of the welding horizontal plate. And since there is a spacing between several welding supports, it can make room for the welding gun, which is convenient for the welding gun to weld the welding horizontal plate and the welding vertical plate, and it is not easy to cause interference, making welding less difficult. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments.

[0023] Figure 1 This is the positional relationship between the welded horizontal plate and the welded vertical plate after welding.

[0024] Figure 2 It is a structural schematic diagram of a preferred embodiment of the present invention;

[0025] Figure 3 It is a top view of a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0026] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] Reference Figures 1 to 3 , a thin plate welding fixture, comprising:

[0031] Two sets of positioning frames, which are arranged facing each other and are used to clamp and weld vertical plates;

[0032] Two groups of fixing frames 40 are arranged relatively above the positioning frame, and a plurality of lifting devices 60 are arranged on the fixing frames 40, and a pressing bracket is arranged on the lifting devices 60. The front end of the pressing bracket is provided with a first pressure rod 50 located between the two groups of fixing frames 40, and the end of the first pressure rod 50 is provided with a clamping round head 70 for abutting against the upper surface of the welding horizontal plate, and a pressure sensor is arranged on the clamping round head 70, and the rear end of the pressing bracket is provided with a second pressure rod 51 for pressing against the surface of the welding horizontal plate.

[0033] The welding vertical plates can be clamped toward each other by two sets of positioning frames, and the welding cross plates can be placed on the top of the two sets of positioning frames. The positions of the welding cross plates and the welding vertical plates can be adjusted on the positioning frames. After the positions are adjusted, the two sets of fixing frames 40 are placed above the welding cross plates and fixed. The initial position of the pressing bracket is adjusted by the lifting device 60 on the fixing frame 40, so that the pressing round head 70 and the end of the second pressing rod 51 are pressed against the upper surface of the welding cross plate. The stability of the position of the welding cross plate can be ensured by pressing at two points. The pressing round head 70 is close to the position where welding is required, that is, the area in the welding structure that is significantly affected by the heat cycle, also known as the actual welding weld heat affected zone. Since the pressing round head 70 is a sphere, point contact is formed. Several pressing round heads 70 on the two sets of fixing frames 40 press the welding cross plates along both sides of the actual welding weld heat affected zone, thereby ensuring the stability and uniform force of the welding cross plate, and each pressing bracket is lifted by a separate lifting device. 60 is controlled, so that the pressure of each pressing bracket on the surface of the welding horizontal plate can be controlled separately, and the pressure sensor can timely feedback the pressure size of the welding horizontal plate to facilitate adjustment, and when the welding horizontal plate is deformed due to welding, the pressure sensor will timely feedback the pressure signal, thereby changing the pressure size and offsetting the deformation of the welding horizontal plate to prevent the welding horizontal plate from deforming. During welding, the welding horizontal plate and the welding vertical plate are installed on the fixture, and then the welding gun melts and welds the welding horizontal plate through the upper surface of the welding horizontal plate, so that the welding horizontal plate and the welding vertical plate are welded together. Since the welding is welded toward the welding vertical plate through the outer side of the welding horizontal plate, it is not easy to melt through, and the welding horizontal plate is positioned by the pressing round head 70 and the top of the positioning frame. When the welding horizontal plate is deformed, the pressure is fed back to the lifting device 60 through the pressure sensor to adjust the pressure of the pressing bracket on the welding horizontal plate, thereby offsetting the deformation of the welding horizontal plate. And because there is a spacing between the plurality of welding brackets, it can make room for the welding gun, which is convenient for the welding gun to weld the welding horizontal plate and the welding vertical plate, and it is not easy to cause interference, making welding less difficult.

[0034] This solution can be used to conveniently weld thin plate T-shaped, thin plate I-shaped and other structures, and is also suitable for butt welding of two flat plates, which can effectively control welding deformation.

[0035] Further improvement is made, so that the positioning frame can follow the fixing frame 40 to adjust the pressure on the welding horizontal plate, preferably the positioning frame includes a first fixing plate 10, a second fixing plate 30 is arranged above the first fixing plate 10, and a spring 20 is arranged between the first fixing plate 10 and the second fixing plate 30. The elastic positioning frame makes the clamp more flexible, and when one side is subjected to excessive force, the second fixing plate 30 can be pressed down by the spring 20, thereby preventing the clamp from being damaged.

[0036] For further improvement, the spring 20 is preferably detachably arranged between the first fixing plate 10 and the second fixing plate 30, so that the spring 20 of different lengths and strengths can be replaced according to different situations, and the length and maximum load of the spring 20 are set and selected according to the welding structure. The spring 20 can be a traditional pressure spring or a hydraulic spring such as a nitrogen spring, which can be selected according to the needs when used. The spring 20 can also be replaced by a hydraulic cylinder or other embodiments.

[0037] As a further improvement, preferably, both the first pressure rod 50 and the second pressure rod 51 are inclined rods, and the first pressure rod 50 and the second pressure rod 51 are symmetrical along the middle of the pressing bracket. More space can be left for the welding gun by the inclined first pressure rod 50 and the second pressure rod 51. Preferably, the angle between the first pressure rod 50 and the horizontal plane is 45 degrees.

[0038] In a further modification, the fixing frame 40 is preferably a mounting rod, and the lifting device 60 is arranged in the mounting rod along the length direction. This method can reduce the complexity of the parts and easily accommodate all the pressing round heads 70 in a straight line. The fixing frame 40 can also be a plurality of separate brackets, and a lifting device 60 is arranged on the top of each separate bracket.

[0039] As a further improvement, in the above scheme, considering the cost issue, it is preferred that the lifting device 60 is a nitrogen spring, and an air pipe is provided at the end of the nitrogen spring, and the air pipe is provided in the mounting rod.

[0040] As a further improvement, the lifting device 60 may also be a hydraulic cylinder.

[0041] As a further improvement, it is preferred that the distance between two adjacent lifting devices 60 is 10-20 cm.

[0042] The present invention also discloses a method for using the above-mentioned thin plate welding fixture, and the steps of the method are as follows:

[0043] 1). Place the welding vertical plate between two sets of positioning frames and adjust the distance and height of the positioning frames to clamp the welding vertical plate;

[0044] 2). Place the welding horizontal plate on the upper surface of the two sets of positioning frames;

[0045] 3) Fix two sets of fixing frames 40 above the welding horizontal plate, and adjust the lifting device 60 so that the pressing round head 70 and the end of the second pressing rod 51 are pressed against the upper surface of the welding horizontal plate, and the pressing round heads 70 on the two sets of fixing frames 40 are respectively located on both sides of the heat affected zone of the actual welding weld of the welding horizontal plate;

[0046] 4). Adjust the lifting device 60 to drive the pressing bracket to press the welding horizontal plate and make the pressure feedback from the pressure sensor reach the specified value;

[0047] 5). Place the welding gun through the upper surface of the welding cross plate and weld downward.

[0048] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or directly or indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A thin plate welding fixture, characterized in that: include: Two groups of positioning frames, the two groups of positioning frames are arranged facing each other and used for clamping and welding the vertical plates, the positioning frames comprising a first fixing plate (10), a second fixing plate (30) being arranged above the first fixing plate (10), and a spring (20) being arranged between the first fixing plate (10) and the second fixing plate (30); Two groups of fixing frames (40), the two groups of fixing frames (40) are arranged opposite to each other above the positioning frame, a plurality of lifting devices (60) are arranged on the fixing frames (40), a pressing bracket is arranged on the lifting devices (60), a first pressing rod (50) located between the two groups of fixing frames (40) is arranged at the front end of the pressing bracket, a pressing round head (70) for abutting against the upper surface of the welding horizontal plate is arranged at the end of the first pressing rod (50), a pressure sensor is arranged on the pressing round head (70), and a second pressing rod (51) for abutting against the surface of the welding horizontal plate is arranged at the rear end of the pressing bracket; The first pressure rod (50) and the second pressure rod (51) are both oblique rods, and the first pressure rod (50) and the second pressure rod (51) are symmetrical along the middle of the pressing bracket.

2. A thin plate welding fixture as claimed in claim 1, characterized in that: The spring (20) is detachably arranged between the first fixing plate (10) and the second fixing plate (30).

3. A thin plate welding fixture as claimed in claim 1, characterized in that: The angle between the first pressure rod (50) and the horizontal plane is 45 degrees.

4. A thin plate welding fixture as claimed in claim 1, characterized in that: The fixing frame (40) is a mounting rod, and the lifting device (60) is arranged in the mounting rod along the length direction.

5. A thin plate welding fixture as claimed in claim 4, characterized in that: The lifting device (60) is a nitrogen spring, an air pipe is arranged at the end of the nitrogen spring, and the air pipe is arranged in the mounting rod.

6. A thin plate welding fixture as claimed in claim 1, characterized in that: The lifting device (60) is a hydraulic cylinder.

7. A thin plate welding fixture as claimed in claim 1, characterized in that: The distance between two adjacent lifting devices (60) is 10-20 cm.

8. A method for using any one of the thin plate welding fixtures in claims 1 to 7, characterized in that: The method steps are as follows: 1). Place the welding vertical plate between two sets of positioning frames and adjust the distance and height of the positioning frames to clamp the welding vertical plate; 2). Place the welding horizontal plate on the upper surface of the two sets of positioning frames; 3) Fix the two sets of fixing frames (40) above the welding horizontal plate, and adjust the lifting device (60) so that the pressing round head (70) and the end of the second pressing rod (51) are pressed against the upper surface of the welding horizontal plate, and the pressing round heads (70) on the two sets of fixing frames (40) are respectively located on both sides of the heat-affected zone of the actual welding seam of the welding horizontal plate; 4). Adjust the lifting device (60) to drive the pressing bracket to press the welding horizontal plate and make the pressure feedback from the pressure sensor reach a specified value; 5). Place the welding gun through the upper surface of the welding cross plate and weld downward.

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