Puppet welding device for welding end face projection welding bolt

Abstract

The invention discloses a puppet welding device for welding end face projection welding bolts, and belongs to the field of automobile welding equipment.The puppet welding device comprises a supporting mechanism, an upward jacking mechanism, a downward pressing mechanism and at least one set of upper and lower electrode assemblies, the supporting mechanism comprises a supporting seat, and a supporting plate is installed on the supporting seat; the upper electrode assembly and the lower electrode assembly are an upper electrode assembly and a lower electrode assembly, a lifting assembly is installed on the upper jacking mechanism, the lower electrode assembly abutting against the lower portion of a welding spot is installed at the lifting end of the lifting assembly, and the lower pressing mechanism is used for installing the upper electrode assembly and abutting against the upper portion of the welding spot. The device does not need an additional projection welding process, reduces the use of tools, reduces the cost, is provided with a puppet welding device for each end face projection welding bolt after being installed on a spot welding clamp, is simple and rapid in welding process, can improve the production efficiency, and meets the requirements of large-scale production.

Description

Technical Field

[0001] The present invention relates to the field of automotive welding equipment, and particularly to a puppet welding device for welding end face projection bolts. Background Art

[0002] Competition in the automotive industry is becoming increasingly fierce. In addition to basic requirements such as vehicle body appearance, comfort, and power performance, vehicle safety has become the primary factor in car selection. An important factor in vehicle safety is reflected in the welding quality of the vehicle body.

[0003] In the prior art, the traditional butt projection bolt welding process on automobiles usually uses a fixed spot welder. Holes are pre-punched on the plate, and the bolt passes through the hole in the plate between the upper and lower electrodes. There is no need to make a special welding tooling. After applying a certain pressure by the fixed spot welder and then energizing, fusion is formed by the heat generated by the resistance. For end face projection bolts, since there are no pre-punched holes on the plate, a special welding tooling needs to be made for positioning and welded on the fixed spot welder, resulting in low production efficiency. Summary of the Invention

[0004] The present invention provides a puppet welding device for welding end face projection bolts to meet the needs of efficient welding of end face projection bolts in the automotive manufacturing industry. This device requires no additional projection welding process, reduces the use of tooling, and lowers costs. After being installed on a spot welding fixture, each end face projection bolt is equipped with a set of puppet welding devices. The welding process is simple and fast, which can improve production efficiency and meet the requirements of large-scale production.

[0005] To achieve the above object, the present invention designs a puppet welding device for welding end face projection bolts. It includes a support mechanism, an upward pushing mechanism, a downward pressing mechanism, and at least one set of upper and lower electrode assemblies. The support mechanism includes a support base, and a support plate is installed on the support base; the upper and lower electrode assemblies are an upper electrode assembly and a lower electrode assembly. An elevating assembly is installed on the upward pushing mechanism, and the lower electrode assembly that abuts below the welding point is installed at the elevating end of the elevating assembly. The downward pressing mechanism is used to install the upper electrode assembly to abut above the welding point.

[0006] The upward pushing mechanism includes a first cylinder. The top of the telescopic end of the first cylinder is installed with a first mounting plate, a first insulating bracket is installed on the first mounting plate, and an elevating assembly is installed on the top of the first insulating bracket.

[0007] Preferably, a first limit post is provided at the top of the first mounting plate, and a first limit block that cooperates with the first limit post is installed on the support plate.

[0008] Preferably, the elevating assembly includes a fixed bracket, a slide rail is installed on the fixed bracket, a slide plate that slides up and down is provided on the slide rail, and the lower electrode assembly is installed on the slide plate.

[0009] Preferably, the lower electrode assembly includes a lower electrode base fixed on the lifting assembly. A lower electrode is installed at the bottom of the lower electrode base. A projection welding bolt insertion tube is provided at the top of the lower electrode base. A projection welding bolt is inserted into the projection welding bolt insertion tube, and a KCF insulating sleeve is provided between the projection welding bolt and the projection welding bolt insertion tube.

[0010] Preferably, the downward pressing mechanism includes a second air cylinder and a downward pressing arm. The bottom of the downward pressing arm is hinged to the top of the support plate. The top of the telescopic end of the second air cylinder is hinged to the tail end of the downward pressing arm. A second mounting plate is installed at the other end of the downward pressing arm. An L-shaped insulating pressing block is installed on the second mounting plate, and an upper electrode assembly is installed on the L-shaped insulating pressing block.

[0011] Preferably, the upper electrode assembly includes an elastic steel sheet and an upper electrode mounting bracket. One end of the elastic steel sheet is fixed on the L-shaped insulating pressing block, and the other end is fixed to the upper electrode mounting bracket. An upper electrode is installed inside the upper electrode mounting bracket.

[0012] Preferably, a third limit block is provided at the bottom of the downward pressing arm, and a limit seat cooperating with the third limit block is provided on the support plate.

[0013] Preferably, a positioning assembly is installed on the support plate. The positioning assembly includes a third air cylinder and a fixing block. The third air cylinder is fixed on the support plate through the fixing block. A second mounting plate is installed at the top of the third air cylinder. A second insulating bracket is installed on the second mounting plate, and a positioning pin is installed at the top of the second insulating bracket.

[0014] Preferably, a second limit post is provided at the top of the second mounting plate, and a second limit block cooperating with the second limit post is installed on the support plate.

[0015] Advantages of the present invention:

[0016] Through its unique structural design and working principle, the device can accurately position the end face bolt, making the welding process of the end face projection welding bolt more efficient. It does not require adding a projection welding process, reduces the use of tooling, and lowers the cost. At the same time, the operation is simple. After being installed on the spot welding fixture, each end face projection welding bolt is equipped with a set of dummy welding devices separately, and the welding process is simple and fast. First, insert the end face projection welding bolt into the round hole of the lower electrode end cover, then install the plate part and clamp it. The electrode cap of the static electrode arm of the spot welding tongs is aligned with the center of the lower electrode and kept in vertical contact. During welding, the electrode cap of the moving electrode arm of the welding tongs presses tightly on the upper electrode. After power-on, the current forms a loop to complete the welding. The whole process is efficient and smooth, greatly improving the production efficiency, better meeting the needs of large-scale production in the automotive manufacturing industry, and shortening the production cycle of products. Description of the Drawings

[0017] Figure 1 Is a perspective view of the present invention;

[0018] Figure 2 Is Figure 1 The rear view of;

[0019] Figure 3 Is a structural diagram of the support mechanism, the downward pressing mechanism and the upper electrode assembly of the present invention;

[0020] Figure 4 Is a perspective view of the positioning mechanism of the present invention;

[0021] Figure 5 Is a perspective view of the upper pushing mechanism of the present invention;

[0022] Figure 6 Is a perspective view of the lifting assembly and the lower electrode assembly of the present invention;

[0023] Figure 7 Is a perspective view of the lower electrode assembly of the present invention.

[0024] Reference numerals:

[0025] 1 Support mechanism, 11 Support base, 12 Support plate, 121 First limit block, 122 Second limit block, 123 Limit seat

[0026] 2 Upper pushing mechanism, 21 First cylinder, 22 First mounting plate, 23 First insulating bracket, 231 First limit post,

[0027] 3 Downward pressing mechanism, 31 Second cylinder, 32 Downward pressing arm, 33 Second mounting plate, 34 L-shaped insulating pressing block, 35 Third limit block,

[0028] 4 Upper electrode assembly, 41 Elastic steel sheet, 42 Upper electrode mounting bracket, 43 Upper electrode,

[0029] 5 Lower electrode assembly, 51 Lower electrode seat, 52 Lower electrode, 53 Projection welding bolt insertion tube, 54 Projection welding bolt, 55 KCF insulating sleeve,

[0030] 6 Lifting assembly, 61 Fixed bracket, 62 Slide rail, 63 Slide plate,

[0031] 7 Positioning assembly, 71 Third cylinder, 72 Fixed block, 73 Second mounting plate, 731 Second limit post, 74 Second insulating bracket, 75 Positioning pin. Detailed implementation manners

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0034] 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 drawings. It is only for the convenience of describing the present application 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 thus should not be construed as a limitation of the present application.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying 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 application, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0036] The reference to "an embodiment" or "some embodiments" in the description of the present application means that a specific feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, the statements "in an embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments" unless otherwise specifically emphasized in other ways. The terms "comprising", "including", "having" and their variants all mean "including but not limited to" unless otherwise specifically emphasized in other ways.

[0037] The present invention will be further described below with reference to the drawings and specific embodiments.

[0038] Embodiment

[0039] As Figures 1 to 7The resistance projection welding device for the projection welding bolt with a welded end face shown includes a support mechanism 1, an upward pressing mechanism 2, a downward pressing mechanism 3, and at least one set of upper and lower electrode assemblies. The support mechanism 1 includes a support base 11, and a support plate 12 is installed on the support base 11. The upper and lower electrode assemblies are an upper electrode assembly 4 and a lower electrode assembly 5. An elevating assembly 6 is installed on the upward pressing mechanism 2, and the lower electrode assembly 5 that abuts against the lower part of the welding point is installed at the elevating end of the elevating assembly 6. The downward pressing mechanism 3 is used to install the upper electrode assembly 4 to abut against the upper part of the welding point.

[0040] The upward pressing mechanism 2 includes a first cylinder 21. The top of the telescopic end of the first cylinder 21 is installed with a first mounting plate 22. A first insulating bracket 23 is installed on the first mounting plate 22, and the elevating assembly 6 is installed on the top of the first insulating bracket 23. A first limiting column 231 is provided at the top of the first mounting plate 22, and a first limiting block 121 that cooperates with the first limiting column 231 is installed on the support plate 12.

[0041] The elevating assembly 6 includes a fixed bracket 61. A slide rail 62 is installed on the fixed bracket 61. A slide plate 63 that slides up and down is provided on the slide rail 62, and the lower electrode assembly 5 is installed on the slide plate 63. The lower electrode assembly 5 includes a lower electrode base 51. The lower electrode base 51 is fixed on the elevating assembly 6. A lower electrode 52 is installed at the bottom of the lower electrode base 51. A projection welding bolt insertion tube 53 is provided at the top of the lower electrode base 51, and a projection welding bolt 54 is inserted into the projection welding bolt insertion tube 53. A KCF insulating sleeve 55 is provided between the projection welding bolt 54 and the projection welding bolt insertion tube 53.

[0042] The downward pressing mechanism 3 includes a second cylinder 31 and a downward pressing arm 32. The bottom of the downward pressing arm 32 is hinged to the top of the support plate 12. The top of the telescopic end of the second cylinder 31 is hinged to the tail end of the downward pressing arm 32. The other end of the downward pressing arm 32 is installed with a second mounting plate 33. An L-shaped insulating pressing block 34 is installed on the second mounting plate 33, and the upper electrode assembly 6 is installed on the L-shaped insulating pressing block 34. The upper electrode assembly 4 includes an elastic steel sheet 41 and an upper electrode mounting bracket 42. One end of the elastic steel sheet 41 is fixed on the L-shaped insulating pressing block 34, and the other end is fixed to the upper electrode mounting bracket 42. An upper electrode 43 is installed in the upper electrode mounting bracket 42. A third limiting block 35 is provided at the bottom of the downward pressing arm 32, and a limiting seat 123 that cooperates with the third limiting block 35 is provided on the support plate 12.

[0043] A positioning assembly 7 is installed on the support plate 12. The positioning assembly 7 includes a third cylinder 71 and a fixed block 72. The third cylinder 71 is fixed on the support plate 12 through the fixed block 72. The top of the third cylinder 71 is installed with a second mounting plate 73. A second insulating bracket 74 is installed on the second mounting plate 73, and a positioning pin 75 is installed on the top of the second insulating bracket 74. A second limiting column 731 is provided at the top of the second mounting plate 73, and a second limiting block 122 that cooperates with the second limiting column 731 is installed on the support plate 12.

[0044] The following describes the process flow of the device when it is working:

[0045] 1. Preparation

[0046] Bolt assembly: Insert the end face projection welding bolt 54 into the projection welding bolt insert 53 of the lower electrode assembly 5, ensuring that the bolt and the insert are insulated and protected by the KCF insulating sleeve 55.

[0047] Panel installation: Place the panel to be welded at a predetermined position, turn on the third cylinder 71, and then insert the positioning pin 75 of the positioning assembly 7 into the reserved through hole of the panel to be welded.

[0048] 2. Clamping process

[0049] Lifting the lower electrode: Start the first cylinder 21 of the lifting mechanism 2, and its telescopic end drives the first mounting plate 22 to rise until the lower electrode 52 is in contact with the plate below the welding point. At this time, there is a slight gap between the lower electrode 52 and the welding point. The remaining gap is lifted by the static arm of the welding wall to lift the lower electrode, and then the slide 63 on the slide rail 62 slides upward, driving the lower electrode assembly 5 to move upward.

[0050] Press down the upper electrode: start the second cylinder 31 of the pressing mechanism 3, and its telescopic end drives the pressing arm 32 to rotate around the hinge point at the bottom. The other end of the pressing arm presses downward, driving the second mounting plate 33 and the L-shaped pressing block 34 and the upper electrode assembly 4 installed thereon to move downward, so that the upper electrode 43 is in contact with the plate above the welding point.

[0051] 3. Welding process

[0052] Welding clamp alignment: Align the static arm and the moving wall electrode cap of the spot welding clamp with the center of the lower electrode 52 and the upper electrode 43, and keep them in vertical contact.

[0053] Power on welding: Activate the spot welding clamp, forming a closed circuit between the upper electrode 43, the weld point of the plate, the projection welding bolt 54, and the lower electrode 52. When power is applied, the resistance heat generated by the current flowing through the weld point melts the metal at the weld point, and the elastic steel sheet 41 provides a certain degree of elastic support and cushioning for the upper electrode mounting frame 42.

[0054] 4. Reset process

[0055] Resetting the lifting mechanism: After welding is completed, the telescopic end of the first cylinder 21 retracts, driving the first mounting plate 22 and the lifting assembly 6 to descend, so that the lower electrode assembly 5 is out of contact with the plate.

[0056] The pressing mechanism is reset: at the same time, the telescopic end of the second cylinder 31 retracts, driving the pressing arm 32 to rotate in the opposite direction, so that the second mounting plate 33 and the upper electrode assembly 4 are lifted upward and out of contact with the plate.

[0057] 5. Welding quality inspection and subsequent processing

[0058] Quality inspection: Carry out quality inspection on the completed end face projection welded bolts, mainly checking the appearance of the welded parts, and use professional testing equipment to test performance indicators such as welding strength and conductivity.

[0059] Cleaning and protection: Clean the welding parts to remove residual welding slag and impurities. If necessary, perform anti-corrosion treatment or apply protective coating on the welding parts.

[0060] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A puppet welding device for projection welding bolts with a welded end face, characterized in that: It includes a support mechanism (1), an upward pressing mechanism (2), a downward pressing mechanism (3) and at least one set of upper and lower electrode assemblies. The support mechanism (1) includes a support base (11), and a support plate (12) is installed on the support base (11); the upper and lower electrode assemblies are an upper electrode assembly (4) and a lower electrode assembly (5). An elevating assembly (6) is installed on the upward pressing mechanism (2), and the lower electrode assembly (5) which abuts against the lower part of the welding point is installed at the elevating end of the elevating assembly (6). The downward pressing mechanism (3) is used for installing the upper electrode assembly (4) to abut against the upper part of the welding point.

2. The projection welding device for projection welding of the welding end face of a stud according to claim 1, characterized in that: The upward pressing mechanism (2) includes a first air cylinder (21), a first mounting plate (22) is installed at the top of the telescopic end of the first air cylinder (21), a first insulating bracket (23) is installed on the first mounting plate (22), and the elevating assembly (6) is installed at the top of the first insulating bracket (23).

3. The projection welding device for the projection welded bolt with a welded end face according to claim 2, characterized in that: A first limit post (231) is provided at the top of the first mounting plate (22), and a first limit block (121) which cooperates with the first limit post (231) is installed on the support plate (12).

4. The projection welding device for projection welding of the welding end face of the convex welding bolt according to claim 1, characterized in that: The elevating assembly (6) includes a fixed bracket (61), a slide rail (62) is installed on the fixed bracket (61), a slide plate (63) which slides up and down is arranged on the slide rail (62), and the lower electrode assembly (5) is installed on the slide plate (63).

5. The projection welding device for projection welding of the welding end face of the stud according to claim 1, characterized in that: The lower electrode assembly (5) includes a lower electrode base (51), the lower electrode base (51) is fixed on the elevating assembly (6), a lower electrode (52) is installed at the bottom of the lower electrode base (51), a projection welding bolt insertion tube (53) is provided at the top of the lower electrode base (51), a projection welding bolt (54) is inserted into the projection welding bolt insertion tube (53), and a KCF insulating sleeve (55) is arranged between the projection welding bolt (54) and the projection welding bolt insertion tube (53).

6. The dummy welding device for projection welding of welding end face projection welding bolts according to claim 1, characterized in that: The downward pressing mechanism (3) includes a second air cylinder (31) and a downward pressing arm (32). The bottom of the downward pressing arm (32) is hinged to the top of the support plate (12), the top of the telescopic end of the second air cylinder (31) is hinged to the tail end of the downward pressing arm (32), a second mounting plate (33) is installed at the other end of the downward pressing arm (32), an L-shaped insulating pressing block (34) is installed on the second mounting plate (33), and the upper electrode assembly (6) is installed on the L-shaped insulating pressing block (34).

7. The projection welding device for projection welding bolts with welded end faces according to claim 6, characterized in that: The upper electrode assembly (4) includes an elastic steel sheet (41) and an upper electrode mounting frame (42). One end of the elastic steel sheet (41) is fixed on the L-shaped insulating pressing block (34), and the other end is fixed to the upper electrode mounting frame (42). An upper electrode (43) is installed in the upper electrode mounting frame (42).

8. The projection welding device for projection welding bolts with welded end faces according to claim 6, characterized in that: A third limit block (35) is provided at the bottom of the downward pressing arm (32), and a limit seat (123) which cooperates with the third limit block (35) is provided on the support plate (12).

9. The projection welding device for projection welding bolts with welded end faces according to claim 1, characterized in that: A positioning component (7) is installed on the support plate (12). The positioning component (7) includes a third cylinder (71) and a fixing block (72). The third cylinder (71) is fixed on the support plate (12) through the fixing block (72). A second mounting plate (73) is installed on the top of the third cylinder (71). A second insulating bracket (74) is installed on the second mounting plate (73). A positioning pin (75) is installed on the top of the second insulating bracket (74).

10. The dummy welding device for projection welding bolts with welded end faces according to claim 9, characterized in that: A second limit post (731) is provided on the top of the second mounting plate (73). A second limit block (122) cooperating with the second limit post (731) is installed on the support plate (12).

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