A fixed projection welding device

Abstract

The present invention discloses a fixed projection welding device, comprising: a driving device, a welding device, a positioning device and a control device provided on a chassis. In the present invention, a positioning device is provided to fix the position of component A. The relative position between component A and the upper electrode can be adjusted when installing the positioning device. During welding, first install component A on the positioning device, then hold component B with both hands and align component B with the lower electrode. After that, control the driving device through the control device, the upper electrode presses component A on the positioning device against component B, and then start the welding device through the control device to weld component A and component B. By providing the positioning device, it is avoided that workers hold component A by hand. By holding component B with both hands, the controllability of workers on component B can be greatly increased, so the yield rate of welding will also be relatively stable.

Description

Technical Field

[0001] The present invention relates to the field of welding technology, and more specifically, to a fixed projection welding device. Background Art

[0002] Projection welding is a resistance welding method in which one or more projections are pre-processed on the fitting surface of a workpiece, brought into contact with the surface of another workpiece and heated by electricity, and then collapsed so that these contact points form weld spots. Projection welding is mainly used for welding stamped parts of low-carbon steel and low-alloy steel. With the development of the automotive industry, high-productivity projection welding has been widely used in the manufacturing of automotive parts. The formation process of projection joints is similar to spot welding and seam welding, and can be roughly divided into three stages: pre-pressure, electric heating, and cooling crystallization.

[0003] During production, nuts are usually welded to stamped parts. Taking the nut as part A and the stamped part as part B, during projection welding, part B needs to be placed on the projection welding device first, and the position of the lower electrode is found manually. Then part A is placed on part B, and part A is held by hand to find the correct position. Then the upper electrode of the welding device is pre-pressed on part A to prevent part A from being misaligned. After that, welding and cooling are carried out. In the above conventional operations, because one hand needs to hold part B and the other hand needs to hold part A, as Figure 12 shown, during the pre-pressure process, it is very difficult to fix the relative position of part A. Operating with both hands will cause the positions of part A and part B of the welded parts produced in the same batch to be different. Moreover, during processing, in addition to the difficulty of operating part B with one hand, there is often a situation of pinching hands when holding part A during pre-pressure. At the same time, a common problem with projection welding devices is that in order to reduce the stroke of the upper electrode, the upper and lower electrodes are usually relatively close. When placing part B and taking out the welded finished product, it is very easy to bump into the upper electrode and cause surface damage to the upper electrode. Therefore, how to avoid holding part A by hand during operation and how to conveniently place part B and take out the finished product are the technical problems to be solved by the present invention. Summary of the Invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further elaborated in the Detailed Description section. The Summary of the Invention section of the present invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0005] To at least partially solve the above problems, the present invention provides a fixed projection welding device, including: a driving device, a welding device, a positioning device, and a control device provided on a chassis;

[0006] A driving device, connected to the welding device, is used to drive the upper electrode of the welding device to move up and down, provide pressure for Component A, and press Component A onto Component B;

[0007] A welding device, used for welding Component A and Component B;

[0008] A positioning device, used to temporarily fix Component A before the upper electrode of the welding device contacts Component A;

[0009] A control device, electrically connected to the driving device and the welding device, is used to control the driving device and the welding device.

[0010] Preferably, the welding device consists of an upper electrode connected to the driving device through an upper fixing member, and a lower electrode connected to the chassis through a lower fixing member. The upper electrode is connected to the side wall of the upper fixing member through an upper adjusting member, and the lower electrode is connected to the side wall of the lower fixing member through a lower adjusting member.

[0011] Preferably, a rotating block is provided on the upper electrode. The rotating block divides the upper electrode into a contact section that contacts Component A, and an adjusting section that is connected to the upper adjusting member. The rotating block is designed in a strip structure. The top of the contact section is connected to the bottom of one end of the rotating block, and the top of the other end of the rotating block is movably connected to the adjusting section.

[0012] Preferably, a slot for inserting the adjusting section is provided on the rotating block. At least two dial rods are provided in the slot. An installation disk with a limiting groove is provided at the bottom of the adjusting section. A reset device is provided on the installation disk. The dial rods are located in the limiting groove, and the reset device abuts against the dial rods.

[0013] Preferably, the reset device consists of a connecting shaft movably connected to the rotating block, and at least two rotating pieces provided on the installation disk. One end of the rotating piece is connected to the installation disk through a rotating shaft. The dial rod abuts against the side wall of the rotating piece. A first reset member is provided on the rotating piece. One end of the first reset member is connected to the rotating shaft, and the other end is connected to the connecting shaft.

[0014] Preferably, the positioning device consists of an installation part, and a large component fixing part provided on the installation part. A vertical installation hole is provided at the top of the installation part. The vertical installation hole is a through hole. A horizontal installation hole is provided on the side wall of the installation part. The horizontal installation hole is arranged in a normal direction with respect to the vertical installation hole. And the large component fixing part and the horizontal installation hole are located on opposite sides of the installation part. The installation part is connected to the bottom of the upper fixing member through the vertical installation hole, or connected to the top of the lower fixing member through the vertical installation hole, or connected to the chassis through the horizontal installation hole.

[0015] Preferably, the large-piece fixing part is composed of two clip pieces arranged symmetrically, namely a first clip piece and a second clip piece. Each clip piece is composed of a clamping section, a holding section, a deformation section, and a connecting section. One end of the connecting section is connected to the installation part, the other end is connected to one end of the deformation section, the other end of the deformation section is connected to one end of the holding section, and the other end of the holding section is connected to one end of the clamping section.

[0016] Preferably, the deformation section is a C-shaped structure, and the opening part of the deformation section faces away from the other clip piece. A second resetting member is selectively filled in the deformation section.

[0017] Preferably, a small-piece fixing part is arranged on the clamping section. A clamping platform is arranged on the clamping section. The small-piece fixing part is C-shaped. A clamping groove for clamping with the clamping platform is arranged on the small-piece fixing part. The clamping groove is located on the other side of the opening of the small-piece fixing part. At least two maintaining members extending towards the opening direction are arranged in the small-piece fixing part. The maintaining members are used to maintain the opening of the small-piece fixing part to tend to a closed state.

[0018] Preferably, it is composed of a central control console electrically connected to the welding device and the driving device, and a foot switch electrically connected to the central control console.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] In the present invention, a positioning device is provided to fix the position of component A. The relative position between component A and the upper electrode can be adjusted when installing the positioning device (see the following embodiments). When welding, first install component A on the positioning device, then hold component B with both hands and align component B with the lower electrode. Then, control the driving device through the control device. The upper electrode pre-presses component A on the positioning device onto component B, and start the welding device through the control device to weld component A and component B. By setting the positioning device, it is avoided that workers hold component A by hand. By holding component B with both hands, the controllability of workers on component B can be greatly increased, so that the deviation between component B and the lower electrode will not be particularly large during each welding. Since the positions of component A relative to the upper and lower electrodes are fixed, the qualified rate of welding will also be relatively stable. The above is one of the numerous implementation manners of the positioning device. According to the different installation positions of the positioning device, its usage manners are also different. For example, the positioning device can also be used as a support for component B. By limiting the position of component B, the deviation during the welding of component A and component B can be reduced.

[0021] The fixed projection welding equipment described in the present invention. Other advantages, objectives, and features of the present invention will be partially reflected by the following description and partially understood by those skilled in the art through the research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0023] Figure 1 It is a schematic structural diagram of the fixed projection welding equipment described in the present invention (the positioning device is not shown).

[0024] Figure 2 is Figure 1 a schematic structural diagram of the other side.

[0025] Figure 3 is a schematic structural diagram at the welding equipment.

[0026] Figure 4 is a schematic position diagram of the reset device before the rotation block rotates.

[0027] Figure 5 is a schematic position diagram of the reset device after the rotation block rotates.

[0028] Figure 6 is a schematic structural diagram of the positioning device (the second reset member is not provided).

[0029] Figure 7 is a schematic structural diagram of the positioning device (the second reset member is provided).

[0030] Figure 8 is a top view of the positioning device.

[0031] Figure 9 is an exploded view at the small part fixing portion and the large part fixing portion of the positioning device.

[0032] Figure 10 is a partial sectional structural schematic diagram of the small part fixing portion.

[0033] Figure 11 is a partial sectional structural schematic diagram of the small part fixing portion (seen from below).

[0034] Figure 12 is a schematic diagram of positioning the component A by hand in the prior art.

[0035] In the figure: 1 driving device, 2 welding device, 21 upper electrode, 22 lower electrode, 3 positioning device, 31 mounting part, 311 vertical mounting hole, 312 horizontal mounting hole, 32 large part fixing part, 32a first clamping piece, 32b second clamping piece, 321 clamping section, 3211 clamping platform, 322 holding section, 323 deformation section, 324 connecting section, 325 second resetting piece, 33 small part fixing part, 331 clamping groove, 332 maintaining piece, 41 central control console, 42 foot switch, 51 upper fixing piece, 52 upper adjusting piece, 61 lower fixing piece, 62 lower adjusting piece, 7 rotating block, 71 lever, 81 mounting disc, 82 connecting shaft, 83 rotating piece, 84 rotating shaft, 85 first resetting piece. Detailed implementation mode

[0036] The following further describes the present invention in detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it according to the description in the specification.

[0037] It should be understood that the terms such as "having", "including" and "comprising" used herein do not exclude the presence or addition of one or more other elements or their combinations.

[0038] As Figures 1-11 shown, the present invention provides a fixed projection welding device, including: a driving device 1, a welding device 2, a positioning device 3 and a control device arranged on the chassis;

[0039] The driving device 1 is connected to the welding device 2 and is used to drive the upper electrode 21 of the welding device 2 to move up and down, provide pressure for component A, and press component A on component B;

[0040] The welding device 2 is used for welding component A and component B;

[0041] The positioning device 3 temporarily fixes component A before the upper electrode 21 of the welding device 2 contacts component A;

[0042] The control device is electrically connected to the driving device 1 and the welding device 2 and is used to control the driving device 1 and the welding device 2. Among them, the chassis, the driving device 1, the welding device 2 and the control device are all commercially available products or existing technologies that can achieve the above functions.

[0043] The welding device 2 consists of an upper electrode 21 connected to the driving device 1 through an upper fixing piece 51 and a lower electrode 22 connected to the chassis through a lower fixing piece 61. The driving device 1 can drive the upper electrode 21 to move in the vertical direction through the upper fixing piece 51. The upper electrode 21 is connected to the side wall of the upper fixing piece 51 through an upper adjusting piece 52, and the lower electrode 22 is connected to the side wall of the lower fixing piece 61 through a lower adjusting piece 62. The upper adjusting piece 52 and the lower adjusting piece 62 can be clamps fastened by bolts. AsFigures 1-3 As shown, both of the two adjusting members are commercially available products or existing technologies capable of adjusting the electrode position.

[0044] The control device is composed of a central control console 41 electrically connected to the welding device 2 and the driving device 1, and a foot switch 42 electrically connected to the central control console 41. Both the central control console 41 and the foot switch 42 are commercially available products or existing technologies.

[0045] Working principle and beneficial effects of the above technical solution: In the present invention, the positioning device 3 is provided to fix the position of component A. The relative position between component A and the upper electrode 21 can be adjusted when installing the positioning device 3 (see the following embodiments). When welding, first install component A on the positioning device 3, then hold component B with both hands and align component B with the lower electrode 22. After that, control the driving device 1 through the control device (foot switch 42), the upper electrode 21 pre-presses component A on the positioning device 3 onto component B, and start the welding device 2 through the control device (central control console 41) to weld component A and component B. By setting the positioning device 3, it is avoided that workers hold component A by hand. By holding component B with both hands, the controllability of workers on component B can be greatly increased, so that the deviation between component B and the lower electrode 22 will not be particularly large during each welding. Since the positions of component A relative to the upper and lower electrodes are fixed, the qualified rate of welding will also be relatively stable. The above is one of the numerous implementation manners of the positioning device 3. According to the different installation positions of the positioning device 3, its usage manners are also different. For example, the positioning device 3 can also be used as a support for component B to reduce the deviation during the welding of component A and component B by limiting the position of component B (see the following embodiments).

[0046] In the previous embodiments, we adjusted the position between the upper electrode 21 and the lower electrode 22 by setting the upper adjusting member 52 and the lower adjusting member 62, so as to avoid hitting the upper electrode 21 when placing the component B or removing the welded part. However, this solution requires increasing the stroke of the up-and-down movement of the upper electrode 21. In order to ensure that the upper electrode 21 has the shortest stroke and at the same time minimize the risk of the upper electrode 21 being hit, we provide an implementation manner of the upper electrode 21. In this embodiment, a rotating block 7 is provided on the upper electrode 21. The rotating block 7 divides the upper electrode 21 into a contact section that contacts the component A and an adjusting section that is connected to the upper adjusting member 52. The rotating block 7 is designed in a strip structure. The top of the contact section is connected to the bottom of one end of the rotating block 7, and the top of the other end of the rotating block 7 is movably connected to the adjusting section, so that the contact section and the adjusting section are not coaxial. A slot for inserting the adjusting section is provided on the rotating block 7. At least two shift rods 71 are provided in the slot. A mounting disk 81 with a limiting groove is provided at the bottom of the adjusting section. A reset device is provided on the mounting disk 81. When the adjusting section is inserted into the slot of the rotating block 7, the shift rods 71 are located in the limiting groove. The limiting groove is usually an arc-shaped groove centered on the mounting disk 81. The reset device abuts against the shift rods 71. When placing the component B or removing the welded part, the rotating block 7 can be toggled. Since the adjusting section is fixed by the upper adjusting member 52, the adjusting section will not move, and the rotating block 7 will rotate around the adjusting section as the rotation axis, thereby driving the contact section to translate. After the translated contact section is not on the same central axis as the lower electrode 22, the component B and the welded part can be conveniently placed and taken without hitting the upper electrode 21. Since the shift rods 71 are provided in the slot of the rotating block 7, when the rotating block 7 rotates, the shift rods 71 will also rotate around the adjusting section as the rotation axis and move in the limiting groove while rotating, thereby driving the reset device to rotate. When the hand is removed from the rotating block 7, because there is no external force, the shift rods 71 will be driven by the reset device to return to their original positions, and then the rotating block 7 will drive the contact section to return to the position opposite to the lower electrode 22, thereby realizing the quick placement and removal of the component B and the welded part.

[0047] The reset device consists of a connecting shaft 82 movably connected to the rotating block 7 and at least two rotating pieces 83 arranged on the mounting disc 81. In addition to the movable connection between the connecting shaft 82 and the inner bottom of the slot of the rotating block 7, there is also a movable connection between the outer wall of the adjusting section located in the slot and the inner wall of the slot. The connection method can be through a bearing connection or any existing technology that can achieve the rotatable connection between the adjusting section and the rotating block 7. Since the upper electrode 21 needs to press down on component A, in order to reduce the problem of force transmission caused by the non-coaxiality of the contact section and the adjusting section, in addition to the point contact provided by the connecting shaft 82 between the rotating block 7 and the bottom of the adjusting section, a rotating piece 83 with a thickness adapted to the height of the connecting shaft 82 needs to be provided to increase the contact area. One end of the rotating piece 83 is connected to the mounting disc 81 through a rotating shaft 84. The lever 71 abuts against the side wall of the rotating piece 83. A first reset member 85 is provided on the rotating piece 83. One end of the first reset member 85 is connected to the rotating shaft 84, and the other end is connected to the connecting shaft 82. The first reset member 85 can be a torsion spring. It should be noted that although a limiting groove is provided on the mounting disc 81, a groove for limiting can still be provided on the side of the rotating piece 83 in contact with the lever 71 to limit the rotation stroke of the rotating block 7. When the lever 71 moves along the limiting groove, the lever 71 will push the rotating piece 83 to rotate around the rotating shaft 84. When the rotating piece 83 rotates, the first reset member 85 is stressed. After the rotating block 7 is not subjected to external force, under the action of the first reset member 85, the rotating piece 83 will push the lever 71 to reset, thereby driving the rotating block 7 to rotate and reset.

[0048] As mentioned before, depending on the installation position of the positioning device 3, its functions are different. In this embodiment, we will give examples one by one. First, the positioning device 3 consists of a mounting part 31 and a large-piece fixing part 32 arranged on the mounting part 31. The thickness of the mounting part 31 is greater than that of the large-piece fixing part 32, so that there is a boss at the connection between the large-piece fixing part 32 and the mounting part 31, forming a limiting block for horizontal limiting, as Figure 6 shown. A vertical mounting hole 311 is provided at the top of the mounting part 31. The vertical mounting hole 311 is a through hole. A horizontal mounting hole 312 is provided on the side wall of the mounting part 31. The horizontal mounting hole 312 is arranged in a normal direction to the vertical mounting hole 311, and the large-piece fixing part 32 and the horizontal mounting hole 312 are located on opposite sides of the mounting part 31. The mounting part 31 is connected to the bottom of the upper fixing member 51 through the vertical mounting hole 311, or is connected to the top of the lower fixing member 61 through the vertical mounting hole 311;

[0049] When the installation part 31 is connected to the bottom of the upper fixing part 51, a T-shaped groove can be provided at the bottom of the upper fixing part 51, and a combination of a bolt and a nut with a T-shaped head can be provided in the vertical installation hole 311, or it can be any commercially available product or existing technology that can realize the connection between the installation part 31 and the upper fixing part 51, thereby completing the connection with the upper fixing part 51; the connection between the installation part 31 and the top of the lower fixing part 61 is the same.

[0050] When the positioning device 3 is used as a support for component B, component B can be placed on the large-piece fixing part 32, and component B is then abutted against the limiting block to limit the position of component B. It should be noted that when the positioning device 3 is used as a support for component B, the positioning device 3 needs to be fixed by connecting it to the chassis through the horizontal installation hole 312, or installed on the lower fixing part 61;

[0051] According to the different installation positions of the installation part 3, the relative movement modes between the upper electrode 21 and component A are also different. For example, when the positioning device 3 is not used as a support for component B but is installed on the chassis, the positioning device 3 will not be driven by the driving device 1, and at this time only the upper electrode 21 moves up and down; the same is true when the installation part 3 is installed on the lower fixing part 61;

[0052] When the installation part 3 is installed on the upper fixing part 51, component A can move along with the upper electrode 21. After the welding is completed, component A and component B are connected as a whole, and the upper electrode 21 will be separated from component A when it is reset.

[0053] When the installation part 3 is installed on the upper fixing part 51, according to the different structures of the large-piece fixing part 32, the relative distance between component A and the upper electrode 21 is also different. For example, when component A is installed on the large-piece fixing part 32, it can either abut against the bottom surface of the upper electrode 21 or leave a distance from the bottom surface of the upper electrode 21. When there is a distance from the bottom surface of the upper electrode 21, during the downward movement, component A will first abut against component B for the worker to visually confirm the position with the naked eye. Then, as the upper electrode 21 moves downward, component A, supported by component B, moves upward relative to the large-piece fixing part 32 until the upper electrode 21 abuts against component A and applies pressure and heat to component A to complete the welding.

[0054] The large-piece fixing part 32 is composed of two symmetrically arranged clamping pieces, which are the first clamping piece 32a and the second clamping piece 32b respectively, as Figure 7 shown. The clamping piece is composed of a clamping section 321, a holding section 322, a deformation section 323, and a connecting section 324, as Figure 8As shown, one end of the connecting section 324 is connected to the mounting section 31, the other end is connected to one end of the deformation section 323, the other end of the deformation section 323 is connected to one end of the holding section 322, and the other end of the holding section 322 is connected to one end of the clamping section 321.

[0055] The clamping section 321 is used to clamp component A. The two opposite surfaces of the clamping section 321 of the two clamping pieces for clamping are parallel, and it is usually used to clamp structures with a symmetric plane such as nuts.

[0056] The holding section 322 is used to hold the relatively large and irregular component A. The distance between the holding section 322 of the first clamping piece 32a and the holding section 322 of the second clamping piece 32b is not less than the distance between the clamping sections 321 of the two clamping pieces. The relative distance at the connection between the holding sections 322 of the two clamping pieces and the deformation section 323 is greater than the relative distance at the connection between the holding sections 322 of the two clamping pieces and the clamping section 321, as Figure 8 shown;

[0057] The deformation section 323 is a C-shaped structure. The opening part of the deformation section 323 faces away from the other clamping piece. The deformation section 323 provides a space for the clamping section 321 and the holding section 322 to open and deform.

[0058] At the same time, in order to increase the clamping force of the clamping section 321 and the holding section 322 on component A and prevent component A from falling off, a second resetting member 325 is filled in the deformation section 323. When component A is clamped or held tightly by the clamping section 321 or the holding section 322, the second resetting member 325 can provide sufficient clamping force.

[0059] Since the clamping section 321, the holding section 322, and the deformation section 323 are all "single-piece" structures, in order to reduce problems such as the decrease in clamping force caused by long-term use, the connecting section 324 is usually composed of "two pieces". One is used to connect the end of the deformation section 323 to the mounting section 31, so that the large-piece fixing part 32 is connected to the mounting section 31 as a whole. The other is used to connect the side of the deformation section 323 far from the opening to the mounting section 31. At the same time, this connecting section 324 is used to connect the two clamping pieces, that is, as Figure 8 shown. At the same time, the "four-piece" connecting section 324 composed of the two clamping pieces can provide sufficient supporting area and sufficient bearing capacity when the positioning device 3 is used as a support, preventing the large-piece fixing part 32 from being bent and deformed, so as to extend the service life of the large-piece fixing part 32.

[0060] The large-piece fixing part 32 solves the problem of temporarily fixing a nut of a conventional size as component A, so that workers no longer need to Figure 12Held by hand like that, based on the large-piece fixing part 32, the present invention provides a temporary fixing method for a small-sized nut as component A. When welding a small-sized component A (usually a component A with a diameter smaller than the bottom diameter of the upper electrode 21), it is impossible to hold it by hand without replacing the upper electrode 21 because it will surely pinch the hand, and the large-piece fixing part 32 cannot clamp component A either. Without replacing any structure, we provide an implementation method, that is, a small-piece fixing part 33 is arranged on the clamping section 321 to temporarily fix the small-sized component A. A clamping platform 3211 is arranged on the clamping section 321. The small-piece fixing part 33 is C-shaped, and a clamping groove 331 engaged with the clamping platform 3211 is arranged on the small-piece fixing part 33. The clamping groove 331 is located on the other side of the opening of the small-piece fixing part 33. When changing the size of component A, without replacing other structures of the present invention, the small-piece fixing part 33 can be directly clamped on the large-piece fixing part 32 and can be directly removed when not needed. At least two maintaining parts 332 extending towards the opening direction are arranged in the small-piece fixing part 33, and the maintaining parts 332 are used to maintain the opening of the small-piece fixing part 33 to tend to a closed state. As Figure 10 shown, the small-piece fixing part 33 can be an elastic part, and the maintaining parts 332 can be multiple arc-shaped elastic parts bending towards the opening of the small-piece fixing part 33. When the small-sized component A is placed in the small-piece fixing part 33, the small-piece fixing part 33 is stretched and deformed, and at the same time, the maintaining parts 332 are straightened and stressed, so as to fix the small-sized component A. At the same time, a high-temperature resistant material can be selected to make the small-piece fixing part 33, and protruding ridges can be arranged on the inner side wall of the small-piece fixing part 33 to clamp the small-sized component A through the ridges, so as to reduce the clamping area of the small-sized component A, and thus welding can be carried out under the clamping of the small-piece fixing part 33.

[0061] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the 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 should not be construed as a limitation to the present invention.

[0062] In the present invention, unless otherwise clearly specified or limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed broadly. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or capable of communicating with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] Although the embodiments of the present invention have been disclosed as above, it is not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the examples shown and described herein.

Claims

1. A fixed projection welding device, characterized in that: include: A driving device (1), a welding device (2), a positioning device (3), and a control device arranged on the chassis; A driving device (1) connected to the welding device (2) and used to drive the upper electrode (21) of the welding device (2) to move up and down, provide pressure to component A, and press component A onto component B; Welding equipment (2), used for welding parts A and B; A positioning device (3) for temporarily fixing component A before the upper electrode (21) of the welding device (2) contacts component A; A control device, electrically connected to the driving device (1) and the welding device (2), and used to control the driving device (1) and the welding device (2); The welding device (2) comprises an upper electrode (21) connected to a driving device (1) via an upper fixing member (51), and a lower electrode (22) connected to a chassis via a lower fixing member (61); the upper electrode (21) is connected to a side wall of the upper fixing member (51) via an upper adjusting member (52), and the lower electrode (22) is connected to a side wall of the lower fixing member (61) via a lower adjusting member (62); The positioning device (3) comprises a mounting portion (31) and a large-part fixing portion (32) arranged on the mounting portion (31); the thickness of the mounting portion (31) is greater than the thickness of the large-part fixing portion (32), so that a boss is present at the connection between the large-part fixing portion (32) and the mounting portion (31), forming a limit block for limiting in the horizontal direction; a vertical mounting hole (311) is provided on the top of the mounting portion (31), and the vertical mounting hole (311) is a through hole; and a horizontal mounting hole (311) is provided on the side wall of the mounting portion (31). The mounting hole (312) is arranged in a normal direction to the vertical mounting hole (311), and the large-piece fixing portion (32) and the horizontal mounting hole (312) are located on two opposite sides of the mounting portion (31), and the mounting portion (31) is connected to the bottom of the upper fixing portion (51) through the vertical mounting hole (311), or is connected to the top of the lower fixing portion (61) through the vertical mounting hole (311), or is connected to the chassis through the horizontal mounting hole (312); The large-piece fixing portion (32) is composed of two symmetrically arranged clips, the two clips being respectively a first clip (32a) and a second clip (32b), the clip being composed of a clamping section (321), a holding section (322), a deformation section (323), and a connecting section (324), one end of the connecting section (324) being connected to the mounting portion (31), and the other end being connected to one end of the deformation section (323), the other end of the deformation section (323) being connected to one end of the holding section (322), and the other end of the holding section (322) being connected to one end of the clamping section (321); The clamping section (321) is used to clamp a structure having a symmetrical plane; The holding section (322) is used to hold a relatively large and irregular structure; The deformation section (323) is a C-shaped structure, the opening portion of the deformation section (323) faces in a direction away from the other clamping piece, the deformation section (323) provides a space for the clamping section (321) and the holding section (322) to open and deform, thereby increasing the strength of the clamping section (321) and the holding section (322) on the component A, and the deformation section (323) is filled with a second restoring member (325); The clamping section (321) is provided with a small-piece fixing portion (33), and the clamping section (321) is provided with a clamping platform (3211). The small-piece fixing portion (33) is C-shaped, and the small-piece fixing portion (33) is provided with a clamping groove (331) clamped with the clamping platform (3211), and the clamping groove (331) is located at the other side of the opening of the small-piece fixing portion (33). At least two maintaining members (332) extending in the direction of the opening are provided in the small-piece fixing portion (33), and the maintaining members (332) are used to maintain the opening of the small-piece fixing portion (33) in a closed state. The small-piece fixing portion (33) is an elastic member, and the maintaining members (332) are a plurality of arc-shaped elastic members bent toward the opening of the small-piece fixing portion (33). The inner side wall of the small-piece fixing portion (33) is provided with protruding ridges, and the small-sized component A is clamped by the ridges.

2. The fixed projection welding device according to claim 1, characterized in that: A rotating block (7) is provided on the upper electrode (21), and the rotating block (7) divides the upper electrode (21) into a contact section in contact with component A, and an adjustment section connected to the upper adjustment member (52). The rotating block (7) is designed as a bar structure, the top of the contact section is connected to the bottom of one end of the rotating block (7), and the top of the other end of the rotating block (7) is movably connected to the adjustment section.

3. The fixed projection welding device according to claim 2, characterized in that: The rotating block (7) is provided with a slot for the adjusting section to be inserted into, at least two levers (71) are provided in the slot, a mounting plate (81) with a limiting groove is provided at the bottom of the adjusting section, a reset device is provided on the mounting plate (81), the lever (71) is located in the limiting groove, and the reset device abuts against the lever (71).

4. The fixed projection welding device according to claim 3, characterized in that: The resetting device comprises a connecting shaft (82) movably connected to the rotating block (7), and at least two rotating plates (83) arranged on the mounting plate (81); one end of the rotating plate (83) is connected to the mounting plate (81) via a rotating shaft (84); the shifting rod (71) abuts against a side wall of the rotating plate (83); a first resetting member (85) is arranged on the rotating plate (83); one end of the first resetting member (85) is connected to the rotating shaft (84), and the other end is connected to the connecting shaft (82).

5. The fixed projection welding equipment according to claim 1, characterized in that: The control device is composed of a central control panel (41) electrically connected to the welding device (2) and the driving device (1), and a foot switch (42) electrically connected to the central control panel (41).

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