Auxiliary welding device for flat butt welding plates

Abstract

The utility model discloses an auxiliary welding device for a flat butt welding plate, which is mounted on a welding bottom plate and comprises a pressing plate for fixing a welding part on the welding bottom plate and a welding cushion block which is fixed on the welding bottom plate, used for adjusting the angle of the welding part and arranged between the welding part and the welding bottom plate, the bottom face of the pressing plate and the surface of the welding cushion block are slopes parallel to each other. The pressing plate with the slope on the surface and the welding cushion block can adjust the angle of the welding parts, so that the two welding parts form a certain included angle, welding deformation can be resisted, and the percent of pass of welding products is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, and more specifically, to an auxiliary welding device for flat butt welding plates. Background Art

[0002] At present, for flat butt welding test pieces, direct welding is carried out using a working platform. All sheet metal products in industries including rail transit components widely use flat butt welds and all require welding flat butt welding plates for welding verification. Without an auxiliary device, the qualified rate of welding flat butt welding plates is not high and cannot meet the requirements of tensile tests. A main factor for the low qualified rate of flat butt welding plates is welding deformation.

[0003] Welding deformation refers to the phenomenon that during the welding process, due to uneven heat input and heat output, the shape and size of the welded parts change.

[0004] The generation of welding deformation is mainly due to the following three factors:

[0005] Welding temperature field: During the welding process, the welded parts are affected by a high-temperature heat source, generating a temperature gradient and a heat cycle. These temperature changes will cause thermal expansion and contraction and phase transformation of the welded parts, resulting in different shrinkage amounts in different parts, causing internal stress and deformation.

[0006] Weld shrinkage: During the welding process, the deposited metal will undergo volume shrinkage during the process from liquid to solid state. This shrinkage will cause the deposited metal to exert a pulling force on the surrounding base metal, resulting in the movement of the base metal towards the weld, causing deformation.

[0007] Structural stiffness: During the welding process, the welded parts are restricted or supported by the surrounding environment or other components, making it impossible for them to freely shrink or expand. This restriction or support will affect the stiffness of the welded parts, that is, the ability to resist deformation. Generally speaking, the greater the structural stiffness, the smaller the deformation; the smaller the structural stiffness, the greater the deformation.

[0008] How to solve welding deformation is a technical problem that needs to be solved by those skilled in the art. Summary of the Utility Model

[0009] To solve the above technical problems, the utility model provides an auxiliary welding device for flat butt welding plates, which can counteract welding deformation and improve the qualified rate of welded products.

[0010] The technical solution provided by the utility model is as follows:

[0011] An auxiliary welding device for flat butt welding plates is installed on a welding base plate,

[0012] including a pressing plate for fixing a welded part on the welding base plate, and

[0013] A welding cushion block placed between the welded part and the welding bottom plate, which is fixed on the welding bottom plate and used to adjust the angle of the welded part.

[0014] Wherein, the bottom surface of the pressing plate and the surface of the welding cushion block are mutually parallel slopes.

[0015] The flat plate butt welding plate auxiliary welding device further includes bolts.

[0016] A screw hole is provided on the pressing plate, and the bolt passes through the screw hole of the pressing plate and is fixedly connected to the welding bottom plate.

[0017] Wherein, a screw hole is provided on the welding cushion block, and the bolt passes through the screw hole on the pressing plate and the screw hole on the welding cushion block in sequence and is fixedly connected to the welding bottom plate.

[0018] Wherein, the surface of the welding cushion block and the surface of the welding bottom plate form an acute angle.

[0019] Wherein, the bottom surface of the pressing plate and the surface of the welding cushion block and the surface of the welding bottom plate form an angle of 3° - 5°.

[0020] It further includes a horizontal pressing member for pressing the welded part on the welding bottom plate.

[0021] Wherein, a screw hole is provided on the horizontal pressing member, and the horizontal pressing member is installed on the welding bottom plate through bolts.

[0022] Wherein, the pressing plate is integrally formed from stainless steel.

[0023] Wherein, the welding cushion block is integrally formed from stainless steel.

[0024] Compared with the prior art, an auxiliary welding device for flat plate butt welding plates of the present utility model is installed on a welding bottom plate, and includes a pressing plate for fixing a welded part on the welding bottom plate, and a welding cushion block fixed on the welding bottom plate and placed between the welded part and the welding bottom plate for adjusting the angle of the welded part. Wherein, the bottom surface of the pressing plate and the surface of the welding cushion block are mutually parallel slopes. The pressing plate and the welding cushion block with slopes on the surface can adjust the angle of the welded part, making the two welded parts form a certain included angle, so as to counteract welding deformation and improve the qualification rate of welded products. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0026] Figure 1 is a schematic structural diagram of the present invention;

[0027] Figure 2 is a side view of the present invention;

[0028] In the figure, there are a welding base plate 100, a pressing plate 200, a welding pad 300, a bolt 400, a horizontal pressing member 500, and a welding member 600. Detailed implementation manners

[0029] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0030] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly disposed on the other element; when an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" and "several" is two or more, unless otherwise specifically defined.

[0033] It should be noted that the structures, proportions, sizes, etc. shown in the attached drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present utility model. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model.

[0034] The embodiments of the present utility model are written in a progressive manner.

[0035] As Figure 1 and Figure 2 shown, an auxiliary welding device for butt welding plates of a flat plate is installed on a welding base plate 100.

[0036] It includes a pressing plate 200 for fixing a welding part 600 on the welding base plate 100, and

[0037] a welding cushion block 300 fixed on the welding base plate 100 and placed between the welding part 600 and the welding base plate 100 for adjusting the angle of the welding part 600.

[0038] Wherein, the bottom surface of the pressing plate 200 and the surface of the welding cushion block 300 are mutually parallel slopes.

[0039] In the prior art, welding deformation is one of the main reasons for the disqualification of the welding part 600. During the welding process, due to the action of the high-temperature heat source on the welded parts, temperature gradients and thermal cycles are generated. These temperature changes will cause thermal expansion and contraction and phase changes of the welded parts, resulting in different amounts of shrinkage in different parts, causing internal stress and deformation. In addition, volume shrinkage occurs during the process of the deposited metal changing from liquid to solid. This shrinkage will cause the deposited metal to exert a pulling force on the surrounding base metal, resulting in the movement of the base metal towards the weld and causing deformation.

[0040] The finished flat butt-welded plate will have deformations such as concave and convex at the weld, which easily leads to an increase in the unqualified rate of the product. The utility model includes a pressing plate 200 and a welding cushion block 300. During welding, the welding cushion block 300 is placed on the welding bottom plate 100, and then the welding part 600 is placed. After aligning with another welding part 600, the pressing plate 200 is pressed on the welding, and the pressing plate 200 and the welding cushion block 300 are fixed on the welding bottom plate 100 through a shaft part. The welding part 600 is fixed on the welding bottom plate 100 due to the pressure of the pressing plate 200. Since the bottom surface of the pressing plate 200 is parallel to the surface of the welding cushion block 300 and is not horizontal, maintaining a sloped angle with the horizontal plane, there is a slight misalignment between the surface of the welding part 600 pressed on the pressing plate 200 and the surface of another welding part 600 directly pressed on the welding bottom plate 100, which can correct the welding deformation to a certain extent.

[0041] Normally during use, first use a welding test piece for testing to detect the welding deformation generated in the current environment, and use the pressing plate 200 and the welding cushion block 300 to adjust one of the welding parts 600 to counteract the welding deformation and improve the product qualification rate.

[0042] The flat butt-welded plate auxiliary welding device of the utility model further includes a bolt 400. A threaded hole is provided on the pressing plate 200, and the bolt 400 passes through the threaded hole of the pressing plate 200 and is fixedly connected to the welding bottom plate 100. The pressing plate 200 is installed on the welding bottom plate 100 through the bolt 400, and the tightness can be adjusted to adapt to welding parts 600 of different thicknesses.

[0043] A threaded hole is provided on the welding cushion block 300 of the utility model, and the bolt 400 sequentially passes through the threaded hole on the pressing plate 200 and the threaded hole on the welding cushion block 300 and is fixedly connected to the welding bottom plate 100. The bolt 400 is sequentially fixed on the welding bottom plate 100 through the pressing plate 200 and the welding cushion block 300, and the tightness can be adjusted to adapt to welding parts 600 of different thicknesses.

[0044] During flat butt welding, the welding cushion block 300, the welding part 600, and the pressing plate 200 are sequentially placed on the welding bottom plate 100. The upper surface of the welding bottom block and the lower surface of the pressing plate 200 are respectively in contact with and press the upper and lower surfaces of the welding part 600. Then the bolt 400 passes through the pressing plate 200 and the welding cushion block 300 and is fixed on the welding bottom plate 100, thereby pressing the welding part 600 tightly. The welding cushion block 300 can adjust the surface angle of the welding part 600 so that its surface is not on the same horizontal plane as the surface of the flat welding part 600 on the other side, having a certain angle, thereby counteracting the welding deformation.

[0045] The surface of the welding cushion block 300 of the present utility model forms an acute angle with the surface of the welding bottom plate 100. The present utility model is to solve the deformation that is likely to occur during the welding of two flat welded parts 600. Therefore, the angles of the two welded parts 600 need to be adjusted. The welding cushion block 300 is located under the welded part 600, and the surface of the welding cushion block 300 is also provided with a slope, which can adjust the surface angle of the welded part 600. The surfaces of the two flat welded parts 600 form an included angle, which can counteract the welding deformation.

[0046] The bottom surface of the pressing plate 200 of the present utility model forms an angle of 3° - 5° with the surface of the welding cushion block 300 and the surface of the welding bottom plate 100. Generally speaking, the welding deformation generated by the flat welded part 600 is relatively subtle. The 3° - 5° can adjust the included angle of 3° - 5° between the welded parts 600, which can effectively counteract the welding deformation.

[0047] The auxiliary welding device for flat butt welding plates of the present utility model further includes a horizontal pressing member 500 for pressing the welded part 600 onto the welding bottom plate 100. The horizontal pressing member 500 presses another welded part 600 onto the welding base, opposite to the welded part 600 with the welding cushion block 300 placed below.

[0048] The horizontal pressing member 500 of the present utility model is provided with a threaded hole, and the horizontal pressing member 500 is installed on the welding bottom plate 100 through a bolt 400. Similarly, the horizontal pressing member 500 is also installed on the welding bottom plate 100 through a bolt 400, and the horizontal plate welded part 600 is fixed between the horizontal pressing member 500 and the welding bottom plate 100.

[0049] As an alternative implementation, the pressing plate 200 of the present utility model is integrally formed from stainless steel, or can also be made of other rigid materials.

[0050] As an alternative implementation, the welding cushion block 300 of the present utility model is integrally formed from stainless steel, or can also be made of other rigid materials.

[0051] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A flat plate butt welding plate auxiliary welding device, mounted on a welding base plate (100), characterized in that: It comprises a pressing plate (200) for fixing the welding piece (600) on the welding base plate (100), and a welding pad (300) fixed on the welding base plate (100) and used for adjusting the angle of the welding piece (600) and disposed between the welding piece (600) and the welding base plate (100), Wherein, the bottom surface of the pressing plate (200) and the surface of the welding pad (300) are slopes parallel to each other.

2. The flat plate butt welding plate auxiliary welding device according to claim 1, characterized in that: Also included are bolts (400), The pressing plate (200) is provided with a screw hole, and the bolt (400) passes through the screw hole of the pressing plate (200) and is fixedly connected to the welding base plate (100).

3. The flat plate butt welding plate auxiliary welding device according to claim 2, characterized in that: The welding pad (300) is provided with a screw hole, and the bolt (400) passes through the screw hole on the pressing plate (200) and the screw hole on the welding pad (300) in sequence to be fixedly connected to the welding base plate (100).

4. The flat plate butt welding plate auxiliary welding device according to claim 3, characterized in that: The surface of the welding pad (300) forms an acute angle with the surface of the welding base plate (100).

5. The flat plate butt welding plate auxiliary welding device according to claim 4, characterized in that: The bottom surface of the pressing plate (200), the surface of the welding pad (300), and the surface of the welding bottom plate (100) are at an angle of 3°-5°.

6. The flat plate butt welding plate auxiliary welding device according to claim 5, characterized in that: It also includes a horizontal pressing piece (500) for pressing the welding piece (600) onto the welding base plate (100).

7. The flat plate butt welding plate auxiliary welding device according to claim 6, characterized in that: The horizontal pressing piece (500) is provided with a screw hole, and the horizontal pressing piece (500) is mounted on the welding base plate (100) via bolts (400).

8. The flat plate butt welding plate auxiliary welding device according to claim 7, characterized in that: The pressing plate (200) is made of stainless steel in one piece.

9. The flat plate butt welding plate auxiliary welding device according to claim 8, characterized in that: The welding pad (300) is made of stainless steel in one piece.

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