Welding device and welding system

Abstract

The utility model discloses a welding device and a welding system. The welding device comprises a welding gun; the electrode assembly comprises a first electrode and a second electrode, and the second electrode is suitable for being connected with the welding gun; the positioning block is connected with the first electrode; the correction assembly is suitable for being arranged between the first electrode and the second electrode, the correction assembly comprises a copper electrode, a to-be-welded part is arranged on the copper electrode, the contact end of the first electrode is suitable for being in surface contact with the copper electrode, and the contact end of the second electrode is suitable for being in surface contact with the to-be-welded part. According to the welding device, the end face of the electrode is enlarged, indentations are reduced, the appearance quality problems of welding spot distortion and too deep indentations on the appearance face in the existing manual resistance spot welding process are solved, the situation that the welding spot is distorted due to the fact that the electrode assembly is difficult to be perpendicular to the plane of the piece to be welded is avoided, and the appearance quality of the welding spot is optimized.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle manufacturing, in particular to a welding device and a welding system. Background Art

[0002] Related technologies indicate that resistance spot welding is the most commonly used joining process for automotive body-in-white (BIW). Some manual welding stations, such as those for openings and closures and side panels, still remain on some production lines. The majority of welds at these stations are visible when the openings and closures are opened. The quality of these welds is highly perceived and represents the level of craftsmanship of the automaker. However, existing manual resistance spot welding processes rely on manual operation of the welding gun, which relies entirely on manual control of its perpendicularity to the surface being welded. This can easily lead to weld distortion and deep surface indentations, which can cause cosmetic quality issues.

[0003] On the other hand, in today's increasingly competitive automotive market, cost reduction has become a common goal for every automaker. Low-cost zinc-aluminum-magnesium (ZAMg)-coated sheet metal is rapidly replacing expensive galvanized sheet metal. However, existing solder joint technology results in small electrode tips and deep indentations. After welding ZAMg-coated sheet metal, the coating accumulates around the indentation, forming bumps or burrs. Furthermore, the weld is hard and extremely difficult to polish, significantly impacting the appearance of the solder joint. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a welding device that can solve the appearance quality problems of twisted welds and deep indentations in the appearance surface of the existing manual resistance spot welding process.

[0005] The utility model also provides a welding system having the welding device.

[0006] According to the first aspect of the present utility model, the welding device includes: a welding gun; an electrode assembly, the electrode assembly includes a first electrode and a second electrode, the second electrode is suitable for being connected to the welding gun; a positioning block, the positioning block is connected to the first electrode; a correction assembly, the correction assembly is suitable for being arranged between the first electrode and the second electrode, the correction assembly includes a copper electrode, the copper electrode is provided with a workpiece to be welded, the contact end of the first electrode is suitable for contacting the surface of the copper electrode, and the contact end of the second electrode is suitable for contacting the surface of the workpiece to be welded.

[0007] According to the welding device of the present invention, the first electrode contacts the copper electrode surface, and the second electrode contacts the surface of the workpiece to be welded, thereby increasing the electrode end surface and reducing the indentation. This solves the appearance quality problems of weld distortion and excessive indentation on the surface of the existing manual resistance spot welding process, avoids the occurrence of weld distortion caused by the difficulty of the electrode assembly being perpendicular to the plane of the workpiece to be welded, optimizes the appearance quality of the weld, and the overall structural design of the welding device is ingenious, the operation method is simple and convenient, and the difficulty of the welding operation is reduced.

[0008] In some embodiments, the correction component further includes: an adjustment plate and an adapter, the adapter is provided on the adjustment plate, and the copper electrode is detachably connected to the adapter.

[0009] In some embodiments, a welding surface suitable for contacting the surface of the workpiece to be welded is formed on the copper electrode, and a chamfer is formed on the periphery of the welding surface.

[0010] In some embodiments, the chamfer has a first chamfer portion and a second chamfer portion, the first chamfer portion is connected to the second chamfer portion in the axial direction of the copper electrode, and a chamfer diameter of the first chamfer portion is smaller than a chamfer diameter of the second chamfer portion.

[0011] In some embodiments, a first positioning portion and a second positioning portion are formed on the copper electrode, and the first positioning portion and the second positioning portion are arranged opposite to each other in a radial direction.

[0012] In some embodiments, the first positioning portion is formed as a first plane extending along the axis of the copper electrode, the second positioning portion is formed as a second plane and a positioning hole, the second plane is arranged parallel to the first plane, and the positioning hole extends on the second plane toward the first plane.

[0013] In some embodiments, a connecting hole is formed on the adapter, and the copper electrode and the adapter are connected to the positioning hole via a fastener passing through the connecting hole.

[0014] In some embodiments, a through hole suitable for a fastener to pass through is formed on the adjustment plate, and the correction assembly further includes an insulating member, which is at least arranged between the fastener and the adjustment plate.

[0015] In some embodiments, the welding device further includes: a bracket having a fixed portion and a movable portion, the first electrode and the positioning block are both disposed at the fixed portion, and the welding gun is disposed at the movable portion.

[0016] According to an embodiment of the second aspect of the present invention, a welding system comprises a clamping device and a welding device according to the first aspect of the present invention, wherein the clamping device is suitable for clamping a correction component of the welding device.

[0017] According to the welding system of the present invention, by setting the welding device of the first aspect of the present invention, the appearance quality problems of twisted welds and excessively deep indentations on the surface of the existing manual resistance spot welding process are solved, the electrode end surface is enlarged, the indentation is reduced, and the appearance quality of the weld is optimized.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of a welding device according to an embodiment of the present utility model;

[0020] Figure 2 yes Figure 1 A partial enlarged schematic diagram of the welding device shown in;

[0021] Figure 3 yes Figure 2 Schematic diagram of the correction assembly shown in;

[0022] Figure 4 yes Figure 3 An exploded schematic diagram of the correction assembly shown in ;

[0023] Figure 5 yes Figure 4 Schematic diagram of the copper electrode shown in;

[0024] Figure 6 yes Figure 5 Schematic diagram of the AA section of the copper electrode shown in;

[0025] Figure 7 yes Figure 1 Schematic diagram of the welding device performing step S1 shown in;

[0026] Figure 8 yes Figure 1 Schematic diagram of the welding device performing step S2 shown in;

[0027] Figure 9 yes Figure 1 Schematic diagram of the welding device performing step S3 and step S4 shown in;

[0028] Figure 10 yes Figure 9 Schematic diagram of the welding device performing step S3.1 shown in FIG;

[0029] Figure 11 yes Figure 9 Schematic diagram of the welding apparatus performing step S3.2 shown in FIG.

[0030] Reference numerals:

[0031] 100. Welding equipment;

[0032] 1. Welding gun;

[0033] 2. Electrode assembly; 21. First electrode; 22. Second electrode;

[0034] 3. Positioning block;

[0035] 4. Calibration assembly; 41. Copper electrode; 411. Chamfer; 4111. First chamfer; 4112. Second chamfer; 412. Welding surface; 413. First plane; 414. Second plane; 415. Positioning hole;

[0036] 42. Adjustment plate; 421. Through hole; 43. Adapter; 431. Connection hole; 44. Insulation member;

[0037] 5. Fasteners;

[0038] 6. Bracket; 61. Fixed portion; 62. Movable portion;

[0039] 200. Parts to be welded. DETAILED DESCRIPTION

[0040] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0041] First, refer to Figures 1-11 A welding system according to an embodiment of the second aspect of the present invention is briefly described. The welding system includes the welding device 100 according to the embodiment of the first aspect of the present invention.

[0042] The welding system according to the embodiment of the present invention comprises: a clamping device and the welding device 100 according to the first embodiment of the present invention, wherein the clamping device is adapted to clamp the correction assembly 4 of the welding device 100. Thus, the welding system has an ingenious structural design and is simple and easy to operate.

[0043] According to the welding system of the embodiment of the present invention, by setting the welding device 100 of the embodiment of the first aspect of the present invention, the appearance quality problems of the existing manual resistance spot welding process, such as the distortion of the weld spot and the excessively deep indentation on the appearance surface, are solved, the electrode end surface is increased, the indentation is reduced, and the appearance quality of the weld spot is optimized.

[0044] Reference below Figures 1-11 A welding device 100 according to an embodiment of the first aspect of the present invention will be described.

[0045] like Figure 1 and Figure 2 As shown, the welding device 100 according to the embodiment of the first aspect of the present utility model includes: a welding gun 1, an electrode assembly 2, a positioning block 3 and a correction assembly 4.

[0046] Specifically, the electrode assembly 2 includes a first electrode 21 and a second electrode 22, the second electrode 22 is suitable for being connected to the welding gun 1, the positioning block 3 is connected to the first electrode 21, the correction assembly 4 is suitable for being arranged between the first electrode 21 and the second electrode 22, the correction assembly 4 includes a copper electrode 41, and the copper electrode 41 is provided with a workpiece 200 to be welded. The contact end of the first electrode 21 is suitable for surface contact with the copper electrode 41, and the contact end of the second electrode 22 is suitable for surface contact with the workpiece 200 to be welded.

[0047] That is to say, under the action of pressure, the first electrode 21 and the copper electrode 41 are in surface contact, and the second electrode 22 and the workpiece 200 to be welded are in surface contact. The contact ends of the first electrode 21 and the second electrode 22 both have electrode caps, and the top plane of the electrode cap is in surface contact with the copper electrode 41, and the top plane of the electrode cap is in surface contact with the workpiece 200 to be welded, thereby achieving automatic vertical correction.

[0048] According to the welding device 100 of the embodiment of the present invention, the first electrode 21 is in surface contact with the copper electrode 41, and the second electrode 22 is in surface contact with the workpiece 200 to be welded, thereby increasing the electrode end surface and reducing the indentation. This solves the appearance quality problems of weld distortion and excessive indentation on the appearance surface in the existing manual resistance spot welding process, avoids the occurrence of weld distortion caused by the electrode assembly 2 being difficult to be perpendicular to the plane of the workpiece 200 to be welded, optimizes the appearance quality of the weld, and the overall structural design of the welding device 100 is ingenious, the operation method is simple and convenient, and the difficulty of welding operation is reduced.

[0049] In some embodiments of the present invention, Figure 3 and Figure 4 As shown, the correction component 4 further includes: an adjustment plate 42 and an adapter 43. The adapter 43 is provided on the adjustment plate 42, and the copper electrode 41 is detachably connected to the adapter 43. Here, the adjustment plate 42 can be a spring steel sheet, which is elastic and can allow the copper electrode 41 to have a certain movable adjustment distance, so as to absorb the precision difference of the plane to be welded between different parts, and always keep the copper electrode 41 in close contact with the plane to be welded of each part to be welded, thereby keeping the plane to be welded flat and not deformed, avoiding a gap between the copper electrode 41 and the plane to be welded of the part to be welded 200, thereby preventing the plane to be welded of the part to be welded 200 from deforming in order to be close to the copper electrode 41 during welding, and ensuring the aesthetic quality of the welding of the parts.

[0050] Furthermore, the copper electrode 41 serves as a consumable of the welding device 100. The copper electrode 41 is detachably connected to the adapter 43 and can be quickly replaced and automatically sharpened, thereby ensuring the consistency of the copper electrode 41, extending the service life of the copper electrode 41, reducing production costs, and improving the appearance quality of the solder joint.

[0051] Furthermore, a welding surface 412 suitable for contacting the surface of the workpiece 200 to be welded is formed on the copper electrode 41, and a chamfer 411 is formed on the periphery of the welding surface 412. The welding surface 412 contacts the workpiece 200 to be welded and transmits the current brought by the electrode assembly 2. It can be understood that the planar electrode can maintain a good flatness of the weld surface during the weld formation process, without indentation or distortion, thereby improving the welding quality and reducing welding spatter, and the setting of the chamfer 411 realizes automatic grinding of the copper electrode 41.

[0052] In some embodiments of the present invention, Figure 5 As shown, the chamfer 411 has a first chamfer portion 4111 and a second chamfer portion 4112. The first chamfer portion 4111 and the second chamfer portion 4112 are connected in the axial direction of the copper electrode 41. The diameter of the chamfer 411 of the first chamfer portion 4111 is smaller than the diameter of the chamfer 411 of the second chamfer portion 4112. It can be understood that the chamfer 411 of the copper electrode 41 is a circular chamfer 411. The chamfer 411 includes two sections, namely, a first chamfer portion 4111 and a second chamfer portion 4112 connected in the axial direction. The diameter of the chamfer 411 of the first chamfer portion 4111 is smaller than the diameter of the chamfer 411 of the second chamfer portion 4112. This enables automatic grinding of the copper electrode 41, providing quality assurance for automatic grinding.

[0053] Moreover, the smaller chamfer 411 diameter of the first chamfered portion 4111 allows the current to be more concentrated in this area at the initial stage of welding, which helps to quickly preheat and accurately control the heating degree of the welding starting point, prevent excessive melting or deformation of the material, and the smooth transition from the small chamfer 411 to the large chamfer 411 can achieve more uniform energy distribution during the welding process. As the welding process deepens, the larger chamfer 411 diameter helps to diffuse heat to a wider area, ensuring uniform fusion of the entire welding plane.

[0054] In some embodiments of the present invention, a first positioning portion and a second positioning portion are formed on the copper electrode 41, and the first positioning portion and the second positioning portion are arranged in a radially opposed relationship. In other words, the first positioning portion and the second positioning portion are arranged in a radially opposed relationship, which helps operators or automated equipment to more accurately place the copper electrode 41 at the correct position and angle, thereby ensuring the positioning and fixation of the copper electrode 41 and the adapter 43.

[0055] Specifically, if Figure 3-Figure 6As shown, the first positioning portion is formed as a first plane 413 extending along the axis of the copper electrode 41, and the second positioning portion is formed as a second plane 414 and a positioning hole 415. The second plane 414 is arranged parallel to the first plane 413, and the positioning hole 415 extends from the second plane 414 toward the first plane 413. Thus, the first plane 413 and the second plane 414 ensure that the copper electrode 41 can be quickly positioned and fixed on the grinding machine during automatic grinding. The positioning hole 415 further ensures the positioning and fixation of the copper electrode 41 and the adapter 43.

[0056] In some embodiments of the present invention, Figure 3 and Figure 4 As shown, a connecting hole 431 is formed on the adapter 43, and the copper electrode 41 and the adapter 43 are connected to the positioning hole 415 through the fastener 5 passing through the connecting hole 431. The connecting hole 431 is formed as a threaded hole, and the copper electrode 41 and the adapter 43 are fixedly connected by the fastener 5, thereby ensuring the structural stability and welding accuracy of the welding device 100, improving the convenience of maintenance and assembly of the copper electrode 41, and improving the assembly efficiency of the correction component 4. The connection and positioning methods are simple, and the copper electrode 41 can be quickly replaced and automatically ground, so that the copper electrode 41 can be automatically ground and reused.

[0057] In some embodiments of the present invention, Figure 3 and Figure 4 As shown, a through hole 421 suitable for the fastener 5 to pass through is formed on the adjustment plate 42, and the correction component 4 also includes an insulating member 44, which is arranged at least between the fastener 5 and the adjustment plate 42. The insulating member 44 can be an insulating gasket or an insulating sleeve. Specifically, the insulating gasket is arranged on the two side surfaces of the adjustment plate 42 and is located between the fastener 5 and the adjustment plate 42. The insulating sleeve is arranged on the nut of the fastener 5. In this way, the current can be prevented from being transmitted to the clamp through the connection of the fastener 5 during welding, thereby avoiding the situation where shunting makes welding impossible.

[0058] In some embodiments of the present invention, Figure 2 As shown, the welding device 100 also includes: a bracket 6, the bracket 6 has a fixed part 61 and a movable part 62, the first electrode 21 and the positioning block 3 are both provided on the fixed part 61, and the welding gun 1 is provided on the movable part 62. The welding gun 1 can be moved up and down by an operator or automated equipment. The fixed part 61 provides a reference point and stable electrode positioning for the welding operation, thereby ensuring the overall efficiency and adaptability of the welding operation.

[0059] The welding system according to the embodiment of the second aspect of the present invention includes the welding device 100 according to the embodiment of the first aspect of the present invention.

[0060] Specifically, the welding system according to the embodiment of the present invention includes: a clamping device and a welding device 100 according to the first embodiment of the present invention, wherein the clamping device is suitable for clamping the correction component 4 of the welding device 100. Thus, the welding system has an ingenious structural design and is simple and easy to use.

[0061] According to the welding system of the embodiment of the present invention, by setting the welding device 100 of the embodiment of the first aspect of the present invention, the appearance quality problems of the existing manual resistance spot welding process, such as the distortion of the weld spot and the excessively deep indentation on the appearance surface, are solved, the electrode end surface is increased, the indentation is reduced, and the appearance quality of the weld spot is optimized.

[0062] The welding method may be adopted in the welding device 100 according to the first embodiment of the present invention or in the welding system according to the second embodiment of the present invention.

[0063] Specifically, the welding method includes:

[0064] Step S1, move the welding gun 1 to the positioning block 3 to perform initial positioning of the welding gun 1; (e.g. Figure 7 shown)

[0065] Step S2, move the welding gun 1 away from the positioning block 3, and move the first electrode 21 close to the lower surface of the copper electrode 41; (as shown in FIG. Figure 8 shown)

[0066] Step S3: Turn on the power of the welding gun 1 and perform welding pre-pressing. The first electrode 21 and the second electrode 22 are automatically corrected to a vertical state. (As shown in FIG. Figure 9 shown)

[0067] Step S4: After pre-pressing is completed, the welding power supply is turned on and the welding pressure is maintained, and resistance spot welding is performed until the welding is completed. Figure 9 shown)

[0068] Furthermore, step S3 includes:

[0069] Step S3.1, move the first electrode 21 and the second electrode 22, so that the first electrode 21 and the copper electrode 41 are in point contact or line contact, and the second electrode 22 and the workpiece 200 are in point contact or line contact; (e.g. Figure 10 shown)

[0070] In step S3.2, the first electrode 21 and the second electrode 22 are pressed together, so that the first electrode 21 and the copper electrode 41 are in surface contact, and the second electrode 22 and the workpiece 200 are in surface contact. Since the copper electrode 41 is thick and has reliable rigidity and strength, under the action of pressure, the first electrode 21 and the copper electrode 41 are in surface contact, and the second electrode 22 and the workpiece 200 are in surface contact, thereby achieving automatic vertical correction. (As shown in FIG. Figure 11 shown)

[0071] Among them, the pressing time of the pre-pressing action is greater than 100ms.

[0072] This solves the appearance quality problems of twisted welds and deep indentations on the surface of the existing manual resistance spot welding process, increases the electrode end surface, reduces indentations, and optimizes the appearance quality of the welds.

[0073] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships 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 to the present invention.

[0074] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0075] In this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0077] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A welding device, characterized in that: include: welding gun; an electrode assembly, the electrode assembly comprising a first electrode and a second electrode, the second electrode being adapted to be connected to the welding gun; a positioning block connected to the first electrode; A correction component is suitable for being arranged between the first electrode and the second electrode, the correction component includes a copper electrode, a workpiece to be welded is provided on the copper electrode, the contact end of the first electrode is suitable for surface contact with the copper electrode, and the contact end of the second electrode is suitable for surface contact with the workpiece to be welded.

2. The welding device according to claim 1, characterized in that The correction component further includes: an adjustment plate and a switching component, wherein the switching component is arranged on the adjustment plate, and the copper electrode is detachably connected to the switching component.

3. The welding device according to claim 2, characterized in that A welding surface suitable for contacting the surface of the workpiece to be welded is formed on the copper electrode, and a chamfer is formed on the periphery of the welding surface.

4. The welding device according to claim 3, characterized in that The chamfer has a first chamfered portion and a second chamfered portion, the first chamfered portion and the second chamfered portion are connected in the axial direction of the copper electrode, and a chamfer diameter of the first chamfered portion is smaller than a chamfer diameter of the second chamfered portion.

5. The welding device according to claim 4, characterized in that A first positioning portion and a second positioning portion are formed on the copper electrode, and the first positioning portion and the second positioning portion are arranged opposite to each other in a radial direction.

6. The welding device according to claim 5, characterized in that The first positioning portion is formed as a first plane extending along the axis of the copper electrode. The second positioning portion is formed as a second plane and a positioning hole. The second plane is arranged parallel to the first plane. The positioning hole extends on the second plane toward the first plane.

7. The welding device according to claim 6, characterized in that A connecting hole is formed on the adapter, and the copper electrode and the adapter are connected to the positioning hole through a fastener passing through the connecting hole.

8. The welding device according to any one of claims 2 to 7, characterized in that: The adjustment plate is formed with a through hole suitable for a fastener to pass through, and the correction component further includes an insulating member, which is at least provided between the fastener and the adjustment plate.

9. The welding device according to any one of claims 1 to 7, characterized in that: Also includes: The bracket has a fixed portion and a movable portion, the first electrode and the positioning block are both arranged at the fixed portion, and the welding gun is arranged at the movable portion.

10. A welding system, characterized in that: include: A clamping device and a welding device according to any one of claims 1 to 9, wherein the clamping device is suitable for clamping a correction component of the welding device.

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