CN221289855U

CN221289855U - Resistance welding device for plates and square tubular parts

Info

Publication number: CN221289855U
Application number: CN202323200975.2U
Authority: CN
Inventors: 马克; 黄明光; 王崇江
Original assignee: Welform Hangzhou Precision Machining Co ltd
Current assignee: Welform Hangzhou Precision Machining Co ltd
Priority date: 2023-11-27
Filing date: 2023-11-27
Publication date: 2024-07-09
Anticipated expiration: 2033-11-27

Abstract

The utility model belongs to the technical field of welding, and particularly relates to a resistance welding device for a plate and a square tubular part, which comprises the following components: an upper electrode cap, a lower electrode cap, a welding gun upper electrode, a welding gun lower electrode; the welding gun is characterized in that an upper electrode cap II is arranged at the bottom end of an upper electrode of the welding gun, the bottom end of the electrode cap II is in a spherical structure, a group of support plates I are arranged at the bottom end of the large-size square pipe in a contact mode, a group of side electrode arms are arranged on the side face of the large-size square pipe, soft connection is arranged on the side electrode arms, and a support plate II is arranged on the other side of the side electrode walls opposite to the large-size square pipe. The device effectively solves the welding problem of the traditional method when square tubular parts are processed, and improves the welding efficiency and the welding quality by adjusting the shape and the contact position of the electrode and adding the supporting block in the welding process.

Description

Resistance welding device for plates and square tubular parts

Technical Field

The utility model belongs to the technical field of welding, and particularly relates to a resistance welding device for plates and square tubular parts.

Background

With the development of industrial automation industry, resistance welding is increasingly applied, and the traditional resistance welding method of plates and square tubular parts has certain limitations, especially when processing parts with complex shapes and large sizes. The square pipe has the advantages that the size of the square pipe is increased, the deformation probability during welding is increased, and the resistance value born during resistance welding is synchronously increased due to the increase of the size of the square pipe, so that the welding effect is affected, and the problem that welding cannot be performed when the welding is serious is solved.

As shown in fig. 1, the conventional welding schematic diagram of a plate and a pipe material includes a plate 2, a square tube 3, a welding gun upper electrode 6, an upper electrode cap 4, a welding gun lower electrode 7, a lower electrode cap 5, and a transformer 99; when welding, the plate 2 is arranged above the square tube 3, the upper electrode cap 4 is arranged at the bottom end of the upper electrode 6 of the welding gun, the upper electrode cap 4 is in contact with the plate 2, the lower electrode cap 5 is arranged at the top of the lower electrode 7 of the welding gun and is used for being in contact with the bottom of the square tube 3, two ends of the transformer 99 are respectively connected with the upper electrode 6 of the welding gun and the lower electrode 7 of the welding gun through wires, one side, far away from the electrodes, of the transformer 99 is electrified to control the upper electrode 6 of the welding gun and the lower electrode 7 of the welding gun to be welded, the upper electrode cap 4 is supported and contacted with the bottom of the square tube 3 through the lower electrode cap 5, the upper electrode cap 4 is contacted with the top of the plate 2, and a welding spot 1 is formed at the contact position of the plate 2 and the square tube 3;

As shown in fig. 2-3, when welding a square pipe 9 with a larger size, after applying a pressure F1 to an upper electrode cap 4 of a welding gun, the contact surface on the square pipe 9 is pressed and deformed downwards, the supporting force F2 on the contact surface on the square pipe 9 is smaller, a concave welding spot 11 is formed, the supporting force F3 on two sides of the pipe wall of the square pipe 9 is insufficient, deformation can occur to two sides, when a transformer 99 is electrified and welded, a poor contact occurs at the concave welding spot 11, a poor welding and a welding failure occur, the end face two 10 of the general upper electrode cap 4 is a small plane, the end face one 8 of the lower electrode cap 5 is a large plane, fig. 3 shows a current flow distribution diagram of conventional welding in a state that the sizes of the plate 2 and the square pipe 9 are large, welding current flows from the end face two 10 of the upper electrode cap 4 to the end face one 8 of the lower electrode cap 5 through two side walls of the square pipe 9, and the values of the resistor R11 and the resistor R12 are larger, and the current I11 and the current I12 are lost;

therefore, according to the invention, the problems of welding are analyzed and researched by aiming at the defects of the existing welding method, and the resistance welding device for the plate and the square tubular part is provided, and the resistance value and the contact strength of a welding loop are reduced and the welding quality and the welding stability are improved by changing the welding contact surface and increasing the supporting strength.

Disclosure of utility model

The embodiment of the utility model aims to provide a resistance welding device for plates and square tubular parts, which aims to solve the problem.

The utility model is realized in that a block diagram of a resistance welding device for plates and square tubular parts comprises: the welding gun comprises a plate, an upper electrode cap, a lower electrode cap, a welding gun upper electrode, a welding gun lower electrode and a large-size square pipe, wherein the bottom end of the welding gun upper electrode is provided with an upper electrode cap II;

After F1 and F20 welding pressure are applied to the square tubular product of jumbo size respectively simultaneously by the flexible coupling that installs on upper electrode cap two and the side electrode arm, the transformer circular telegram welds, and the electric current flows to the flexible coupling from the terminal surface flow of upper electrode cap two through being welded work piece, because this distance is shorter, and the return circuit resistance value is less, and energy loss is lower, can be at the better solder joint of formation.

Compared with the prior art, the resistance welding device for the plate and the square tubular part effectively solves the welding problem of the traditional method when the square tubular part is processed, and improves the welding efficiency and the welding quality by adjusting the shape and the contact position of the electrode and adding the supporting block in the welding process.

Drawings

Fig. 1 is a schematic diagram of a conventional welding structure of a plate and a square pipe.

Fig. 2 is a schematic diagram of a conventional welded structure of a plate material and a large-sized square pipe.

Fig. 3 is a graph showing the current flow distribution when a plate material is conventionally welded with a large-sized square pipe.

Fig. 4 is a schematic diagram of a welded structure of a plate material and a large-sized square pipe material according to the present invention.

FIG. 5 is a graph showing the current flow distribution for welding a plate material and a large square pipe material according to the present invention;

in the accompanying drawings: the welding device comprises a welding spot 1, a plate 2, a square tube 3, an upper electrode cap 4, a lower electrode cap 5, a welding gun upper electrode 6, a welding gun lower electrode 7, a first end surface 8, a large-size square tube 9, a second end surface 10, a concave welding spot 11, a transformer 99, an upper electrode cap 14, a third end surface 15, an insulating layer 16, a second support plate 18, a first support plate 19, a side electrode arm 20 and a flexible connection 21.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Specific implementations of the utility model are described in detail below in connection with specific embodiments.

Referring to fig. 1, a block diagram of a resistance welding device for a plate and a square tubular member according to an embodiment of the present utility model includes: the welding gun comprises a plate 2, an upper electrode cap 4, a lower electrode cap 5, a welding gun upper electrode 6, a welding gun lower electrode 7 and a large-size square pipe 9, wherein the bottom end of the welding gun upper electrode 6 is provided with an upper electrode cap two 14, the bottom end of the electrode cap two 14 is of a spherical structure, when the same pressure F1 is applied, the force of the plate 2 in contact with the large-size square pipe 9 is controlled, a group of first supporting plates 19 are arranged at the bottom end of the large-size square pipe 9 in a contact manner, the first supporting plates 19 are fully contacted with the bottom of the large-size square pipe 9 and are used for supporting the welding pressure of F1 applied by a welding tongs, a group of side electrode arms 20 are arranged on the side surface of the large-size square pipe 9, the side electrode arms 20 are arranged for reducing the loop resistance value of the large-size square pipe 9 when the large-size square pipe 9 is welded, a flexible connection 21 is arranged on the side electrode arms 20, the welding tongs drive the side electrode arms 20 to apply the pressure F20 to the large-size square pipe 9 when the same pressure F1 is applied, the flexible connection 19 is used for increasing the contact area of the side electrode arms 20 and the large-size square pipe 9, a first setting variable of the workpiece and the workpiece stress can also compensate for the surface unevenness and the workpiece stress to occur, and the second supporting plates are arranged on the opposite side of the large-size square pipe 9, and the side 18 is matched with the side support plates 18, and the side 18 is kept to be a longitudinal variable;

As shown in fig. 5, after the soft connection 19 installed on the upper electrode cap two 14 and the side electrode arm 20 applies the welding pressure of F1 and F20 to the large-size square tube 9 at the same time, the transformer 99 is electrified for welding, and the current flows from the end face 15 of the upper electrode cap two 14 to the soft connection 19 through the welded workpiece, and because the distance is shorter, the loop resistance value is smaller, the energy loss is lower, and a better welding spot can be formed.

In the embodiment of the present utility model, for the first support plate 19, the outer side of the second support plate 18 is provided with a corresponding positioning structure, which is not shown in the figure, and the positioning structure can be realized by using a conventional tool, and the details thereof are not repeated here;

the flexible connection 21 is made of copper braided strips, the copper braided strips can be better attached to the side face of the large-size square pipe 9, the copper braided strips are firmer and more reliable in the working process, and the service life of flexible connection of the easily damaged parts of the welding tongs is greatly prolonged.

In an example of the utility model, as shown in fig. 4, insulating layers 16 are arranged at two sides of the position between the plate 2 and the large-size square pipe 9, and the insulating layers 16 are distributed at intervals, so that the problem of poor contact between the plate 2 and the large-size square pipe 9 can be effectively reduced, and meanwhile, the split flow is reduced, and the welding quality is improved;

Specifically, the insulating layer 16 may be generally provided as an insulating sheet, an insulating paste, an insulating varnish, an insulating coating, or the like.

It should be noted that, in the present technical solution, although the design and use are performed for the large-size square pipe 9, in practical situations, the design and use are not limited to the shape illustrated by the square pipe 9, and the design and use can be also performed for other similar closed section bars or cavity type parts;

The same principle is adopted, and the technical scheme not only can be used for the resistance welding tongs, but also can be used for automatic chemical welding or fixed welding machines.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. A resistance welding device for a plate material and a square tubular member, comprising: the plate (2), the upper electrode cap (4), the lower electrode cap (5), the upper electrode (6) of the welding gun, the lower electrode (7) of the welding gun and the large-size square pipe (9); the welding gun is characterized in that an upper electrode cap II (14) is arranged at the bottom end of the upper electrode (6) of the welding gun, the bottom end of the electrode cap II (14) is in a spherical structure, a group of support plates I (19) are arranged at the bottom end of the large-size square pipe (9) in a contact mode, a group of side electrode arms (20) are arranged on the side face of the large-size square pipe (9), a flexible connection (21) is arranged on the side electrode arms (20), and a support plate II (18) is arranged on the other side of the side electrode arms (20) opposite to the large-size square pipe (9).

2. A device for resistance welding of sheet and square tubular elements according to claim 1, characterised in that the first support plate (19) and the second support plate (18) are each provided on their outer sides with corresponding positioning means.

3. A device for resistance welding of sheet and square tubular parts according to claim 2, characterized in that the flexible connection (21) is made of copper braid.

4. A device for resistance welding of sheet and square tubular elements according to claim 1, characterized in that insulation layers (16) are provided on both sides of the location between the sheet (2) and the large-size square tubular element (9).