An indirect dotting method

Abstract

The present application relates to spot welding technical field, disclose a kind of indirect spot method, comprising: in the welding positioning fixture, movable setting electrically conductive plate, electrically conductive plate can slide up and down;The welding piece to be welded is clamped and set between upper and lower electrically conductive plate;The electrode head of welding gun is connected with electrically conductive plate;Start welding gun while electrifying electrically conductive plate, spot welding is carried out on the welding piece to be welded.The present application is when indirect spot operation, using welding positioning fixture, the welding piece to be welded is clamped between upper and lower electrically conductive plate, the welding piece to be welded is fixed, electrically conductive plate is positioned accurately, and electrically conductive plate can be ensured to be closely attached with the welding piece to be welded;Electrically conductive plate is elastically connected on welding positioning fixture and can slide up and down, electrically conductive plate is returned to the same position each time under the resilience of elastic member and is closely attached with the welding piece to be welded, reduce the position deviation before and after welding, guarantee welding precision;Compared with the method of direct welding, reduce the loss of electrode head, reduce use cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spot welding, more particularly, the present application relates to an indirect spot method. BACKGROUND

[0002] Spot welding is an important welding method. In traditional resistance spot welding, two electrodes are directly clamped on the upper and lower surfaces of the workpiece, and the current passes through the workpiece vertically to form a welding spot directly at the electrode contact position. In the prior art, such as Chinese patent CN222492552U, a spot welding machine convenient to move is disclosed, which adopts a direct welding method. When in use, the welding pieces are placed between the two electrodes, and when working, the two electrodes press the workpiece to form a certain contact resistance between the two layers of metal under the pressure of the two electrodes, and form a hot fusion joint, thereby performing spot welding. This welding method often uses a flat electrode cap, and the commonly used ball electrode cap has a large welding contact area and is easy to wear. In order to ensure quality, it needs to be frequently ground and polished, and the manufacturing and maintenance cost is high.

[0003] When using an indirect welding method, the electrode is not directly clamped on the top and bottom of the welding spot, but conducts current through a conductive plate to form a welding spot in a certain area of the current path. During the indirect welding process, it is difficult to position the conductive plate, and the position of the conductive plate changes slightly before and after welding or the assembled parts have assembly errors, so it is difficult to ensure that the conductive plate is tightly attached to the parts to be welded.

[0004] Therefore, it is necessary to propose an indirect spot method to at least partially solve the problems existing in the prior art. SUMMARY

[0005] A series of simplified concepts are introduced in the summary section, which will be further described in detail in the specific embodiment section. The summary section of the present application does not mean to attempt to limit the key features and necessary technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0006] To at least partially solve the above problems, the present application provides an indirect spot method, comprising:

[0007] The conductive plate is movably arranged on the welding positioning fixture, and the conductive plate can slide up and down;

[0008] The parts to be welded are clamped between the upper and lower conductive plates;

[0009] The electrode head of the welding gun is connected with the conductive plate;

[0010] Start the welding gun and power on the conductive plate to perform spot welding on the parts to be welded.

[0011] The welding positioning clamp comprises a support, a conductive plate, a positioning pin and an elastic member, the positioning pin is installed on the support, the conductive plate is sleeved on the positioning pin and is in sliding connection with the positioning pin, and the elastic member is sleeved on the positioning pin and is in elastic connection with the conductive plate.

[0012] Preferably, the support comprises a base, a pressing arm, a first transition plate and a second transition plate, the pressing arm is rotationally connected to the top end of the base, and the bottom surface of the pressing arm is provided with a first platform; one end of the first transition plate is installed on the first platform, the side surface of the base is provided with a second platform, and one end of the second transition plate is installed on the second platform; and the first transition plate and the second transition plate are arranged in parallel.

[0013] Preferably, a gasket is arranged between the first transition plate and the first platform of the pressing arm and between the second transition plate and the second platform of the base.

[0014] Preferably, the conductive plate comprises an upper conductive plate and a lower conductive plate, the upper conductive plate is in abutting connection with the first transition plate, the lower conductive plate is in abutting connection with the second transition plate, and the upper conductive plate and the lower conductive plate are respectively arranged on the upper side and the lower side of the welding piece.

[0015] Preferably, the upper conductive plate and the lower conductive plate are of the same structure and are arranged in up-down symmetry, the clamping ends of the upper conductive plate and the lower conductive plate are bent towards the center of the two, and the clamping ends form a clamping space for the welding piece; the top surface of the clamping end of the upper conductive plate and the bottom surface of the clamping end of the lower conductive plate are provided with recesses, the recesses are matched with the electrode head of the welding gun, and the abutting plate edges of the conductive plate and the transition plate are provided with chamfers.

[0016] Preferably, the positioning pin comprises a threaded hole, a baffle, a guide body and a positioning body, the baffle, the guide body and the positioning body are sequentially connected, the threaded hole is arranged through the center of the baffle, the guide body and the positioning body, and a screw is arranged through the threaded hole to install the positioning pin on the transition plate.

[0017] Preferably, the conductive plate is provided with a pin hole, the positioning pin is connected with the transition plate through the pin hole, and the elastic member is sleeved on the positioning pin and connected between the baffle and the conductive plate.

[0018] Preferably, the positioning body and the guide body are in a cylindrical shape, one side of the positioning body and the guide body is provided with a tapered surface; the pin hole is provided with a tapered surface corresponding to the positioning body; there is an assembly gap between the guide body and the hole wall of the pin hole, and the positioning body is in close fit with the hole wall of the pin hole.

[0019] Preferably, the conductive plate is a copper plate, and the electrical conductivity is greater than 80%.

[0020] Preferably, the second platform of the base is connected with the pressing arm through an auxiliary positioning assembly, and the auxiliary positioning assembly comprises:

[0021] a hinged seat connected to the second platform of the base;

[0022] The stabilizing frame is rotatably connected to the hinge seat at the bottom end and hingedly connected to the pressing arm at the top end, and the length of the stabilizing frame is set to be adjustable.

[0023] Preferably, the telescopic part comprises:

[0024] The cylinder is provided with a guide sliding groove on the side surface, and an induction groove is arranged on the inner bottom of the cylinder.

[0025] The stabilizing sliding block is slidably connected to the cylinder and extends to the front and rear of the base through the guide sliding groove on both sides. The top end of the stabilizing sliding block is provided with a groove.

[0026] The telescopic frame is arranged in an L shape, the bottom end of the telescopic frame is connected to the stabilizing sliding block, and the top end of the telescopic frame is hingedly connected to the pressing arm.

[0027] The adjusting screw is screwed to the top end of the cylinder and coaxially arranged with the cylinder.

[0028] The adjusting block is rotatably connected to the bottom end of the adjusting screw and slidably arranged with the inner wall of the cylinder without rotation.

[0029] The pressure regulating spring is installed in the groove at one end and connected to the adjusting block at the other end.

[0030] Preferably, the induction groove is provided with an induction block, and the top end detection end of the induction block abuts against the stabilizing sliding block.

[0031] Preferably, the detection part comprises:

[0032] The first detection ring is connected to the lower part of the cylinder.

[0033] The first conductive plate is concentrically connected to the outside of the first detection ring.

[0034] The second detection ring is concentrically arranged outside the first detection ring.

[0035] The second conductive plate is concentrically connected to the inside of the second detection ring, and a gap is arranged between the second conductive plate and the first conductive plate, and the first conductive plate and the second conductive plate are electrically connected to the controller.

[0036] The tension spring assembly is arranged in two groups, and the two groups of tension spring assemblies are respectively connected between the top of the second detection ring and the cylinder and between the bottom of the second detection ring and the cylinder. The two groups of tension spring assemblies each comprise a plurality of tension springs arranged in a circumferential direction, and each tension spring is arranged obliquely.

[0037] The counterweight block is arranged inside the first detection ring and the second detection ring.

[0038] A support ring is connected concentrically outside the second detection ring, and hinge shafts are arranged in front and back of the support ring and are rotationally connected with the hinge holes in front and back of the hinge seat.

[0039] Compared with the prior art, the present application at least includes the following beneficial effects:

[0040] The present application provides an indirect dotting method, which adopts an indirect dotting method during spot welding, current flows from one electrode head of a welding gun, is conducted to the position to be welded of a workpiece through a conductive plate, and then flows out from another electrode head of the welding gun to form a welding spot. During indirect dotting operation, a welding positioning fixture is used to clamp the workpiece to be welded between the upper and lower conductive plates, so that the workpiece to be welded is fixed, the conductive plates are accurately positioned, and the conductive plates can be tightly attached to the workpiece to be welded; the conductive plates are elastically connected to the welding positioning fixture and can slide up and down, the conductive plates return to the same position each time under the elastic force of the elastic member and are tightly attached to the workpiece to be welded, so that the position deviation before and after welding is reduced and the welding precision is ensured; compared with the direct welding method, the wear of the electrode head is reduced and the use cost is reduced.

[0041] The indirect dotting method of the present application, other advantages, objects and features of the present application will be partially embodied through the following description, and some will be understood by those skilled in the art through research and practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0042] The accompanying drawings are used to provide further understanding of the present application, and constitute a part of the specification, together with embodiments of the present application, to explain the present application, and do not constitute a limitation on the present application. In the drawings:

[0043] Figure 1 It is a structural schematic diagram of the indirect dotting device in the present application;

[0044] Figure 2 It is a structural schematic diagram of the welding positioning fixture in the present application;

[0045] Figure 3 It is a front view of the welding positioning fixture in the present application;

[0046] Figure 4 It is a sectional structural schematic diagram of the upper part of the welding positioning fixture in the present application;

[0047] Figure 5 It is a structural schematic diagram of the present application Figure 4 A local enlarged structural schematic diagram of the present application

[0048] Figure 6 It is a structural schematic diagram of the positioning pin in the present application;

[0049] Figure 7 It is a mounting structural schematic diagram of the auxiliary positioning assembly in the present application;

[0050] Figure 8 This is a cross-sectional structural diagram of the auxiliary positioning component in this invention;

[0051] Figure 9 This is a schematic cross-sectional view of the upper part of the auxiliary positioning component in this invention;

[0052] Figure 10 This is a schematic cross-sectional view of the lower part of the auxiliary positioning component in this invention;

[0053] Figure 11 This is a schematic diagram of the structure of the cylinder in this invention.

[0054] In the diagram: 100. Welding positioning fixture; 10. Support; 11. Base; 12. Pressure arm; 13. First transition plate; 14. Second transition plate; 15. Shim; 20. Positioning pin; 21. Screw hole; 22. Baffle; 23. Guide; 24. Positioning body; 30. Conductive plate; 31. Upper conductive plate; 32. Lower conductive plate; 33. Recess; 34. Pin hole; 35. Chamfer; 40. Elastic element; 200. Part to be welded; 300. Welding torch; 400. Hinge seat; 41. Cylinder body; 42. Guide groove; 43. Sensing groove; 44. Stabilizing slider; 45. Groove; 46. Telescopic frame; 47. Adjusting screw; 48. Adjusting block; 49. Pressure adjusting spring; 410. Sensing block; 411. First detection ring; 412. First conductive plate; 413. Second detection ring; 414. Second conductive plate; 415. Tension spring assembly; 416. Counterweight; 417. Support ring; 418. Hinge shaft. Detailed Implementation

[0055] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0056] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0057] Example 1:

[0058] like Figures 1-6 As shown, the present invention provides an indirect dot-marking method, comprising:

[0059] A conductive plate 30 is movably mounted on the welding positioning fixture 100, and the conductive plate 30 can slide up and down.

[0060] The workpiece 200 to be welded is clamped and positioned between the upper and lower conductive plates 30;

[0061] Connect the electrode head of the welding torch 300 to the conductive plate 30;

[0062] The welding gun 300 is started, and the conductive plate 30 is electrified at the same time, so that spot welding is performed on the workpiece 200 to be welded.

[0063] The working principle and beneficial effects of the above technical solution are:

[0064] The present application provides an indirect spot welding method, which adopts an indirect spot welding method during spot welding. The current flows from one electrode head of the welding gun 300, is conducted to the position to be welded of the workpiece through the conductive plate 30, and then flows out from the other electrode head of the welding gun 300, so as to form a welding spot. During indirect spot welding, the welding positioning fixture 100 is used to clamp the workpiece 200 to be welded between the upper and lower conductive plates 30, so as to fix the workpiece 200 to be welded. The conductive plate 30 is accurately positioned and can ensure that the conductive plate 30 is closely attached to the workpiece 200 to be welded. The conductive plate 30 is elastically connected to the welding positioning fixture 100 and can slide up and down. The conductive plate 30 returns to the same position each time under the action of the elastic force of the elastic member and is closely attached to the workpiece 200 to be welded, so as to reduce the position deviation before and after welding and ensure the welding precision. Meanwhile, compared with the direct welding method, the wear of the electrode head is reduced, and the use cost is reduced.

[0065] Embodiment 2:

[0066] On the basis of the above-mentioned embodiment 1, the welding positioning fixture 100 comprises a support 10, a conductive plate 30, a positioning pin 20 and an elastic member 40. The positioning pin 20 is installed on the support 10. The conductive plate 30 is sleeved on the positioning pin 20 and is in sliding connection with the positioning pin 20. The elastic member 40 is sleeved on the positioning pin 20 and is in elastic connection with the conductive plate 30. The axial direction of the positioning pin 20 is the same as the direction of the clamping force.

[0067] The working principle and beneficial effects of the above technical solution are:

[0068] The support 10 in the welding positioning fixture 100 is used as a main supporting component and is used to fix the positioning pin 20. The positioning pin 20 is connected with the conductive plate 30 through the elastic member 40, so that the conductive plate 30 can slide along the positioning pin 20 under the elastic force of the elastic member 40. The axial direction of the positioning pin 20 is the same as the direction of the clamping force, so that the moving direction of the conductive plate 30 is consistent with the clamping direction. The conductive plate 30 can move and reset along the clamping direction, so as to reduce the resistance in the moving process of the conductive plate 30.

[0069] Embodiment 3:

[0070] On the basis of the above embodiment 2, the support 10 comprises a base 11, a pressing arm 12, a first transition plate 13 and a second transition plate 14, the pressing arm 12 is rotationally connected to the top end of the base 11, and the bottom surface of the pressing arm 12 is provided with a first platform; one end of the first transition plate 13 is mounted on the first platform, the side surface of the base 11 is provided with a second platform, and one end of the second transition plate 14 is mounted on the second platform; the first transition plate 13 and the second transition plate 14 are arranged in parallel.

[0071] A gasket 15 is arranged between the first transition plate 13 and the first platform of the pressing arm 12, and between the second transition plate 14 and the second platform of the base 11.

[0072] The conductive plate 30 comprises an upper conductive plate 31 and a lower conductive plate 32, the upper conductive plate 31 is attached to the first transition plate 13, and the lower conductive plate 32 is attached to the second transition plate 14, and the upper conductive plate 31 and the lower conductive plate 32 are respectively located on the upper and lower sides of the to-be-welded piece 200.

[0073] The conductive plate 30 is a copper plate, and the conductivity is greater than 80%.

[0074] The working principle and beneficial effects of the above technical solution are:

[0075] The second platform arranged on the side surface of the support 10 is fixed and used for supporting the second transition plate 14, the first platform arranged on the top surface of the support 10 is rotationally arranged and used for supporting the first transition plate 13; when the to-be-welded piece 200 is clamped, the pressing arm 12 is upwardly rotated to make the first transition plate 13 and the second transition plate 14 away from each other, and the to-be-welded piece 200 is placed on the lower conductive plate 32; then the pressing arm 12 is reversely rotated to make the first transition plate 13 and the second transition plate 14 correspond to each other in up and down directions, at this moment, the upper conductive plate 31 and the lower conductive plate 32 correspond to each other in up and down directions, and the to-be-welded piece 200 is clamped and fixed in up and down directions, thereby facilitating the rapid clamping of the to-be-welded piece 200.

[0076] Embodiment 4:

[0077] On the basis of the above embodiment 3, the upper conductive plate 31 and the lower conductive plate 32 are the same in structure and are arranged in up and down symmetry, the clamping ends of the upper conductive plate 31 and the lower conductive plate 32 are bent towards the center of the two, and form a clamping space of the to-be-welded piece 200; the top surface of the clamping end of the upper conductive plate 31 and the bottom surface of the clamping end of the lower conductive plate 32 are provided with recesses 33, the recesses 33 are matched with the electrode head of the welding gun 300, and the plate edges of the conductive plate 30 and the transition plate are provided with chamfers 35.

[0078] The working principle and beneficial effects of the above technical solution are:

[0079] The clamping ends of the upper conductive plate 31 and the lower conductive plate 32 are bent towards their center to form corresponding clamping surfaces. The area of ​​the clamping surfaces is small, which facilitates the precise positioning of the dot. The recess 33 cooperates with the electrode head of the welding gun 300 to improve the fitting accuracy between the conductive plate 30 and the electrode head, reduce the assembly error of the electrode head, and improve the welding quality.

[0080] Example 5:

[0081] Based on the above embodiment 4, the positioning pin 20 includes a screw hole 21, a baffle 22, a guide body 23 and a positioning body 24. The baffle 22, the guide body 23 and the positioning body 24 are connected in sequence. The screw hole 21 is disposed through the center of the baffle 22, the guide body 23 and the positioning body 24. The screw passes through the screw hole 21 to install the positioning pin 20 on the transition plate.

[0082] The conductive plate 30 is provided with a pin hole 34. The positioning pin 20 passes through the pin hole 34 and is connected to the transition plate. The elastic element 40 is sleeved on the positioning pin 20 and connected between the baffle 22 and the conductive plate 30.

[0083] Both the positioning body 24 and the guide body 23 are cylindrical. A tapered surface is provided on the side where the positioning body 24 connects to the guide body 23. A tapered surface corresponding to the positioning body 24 is provided in the pin hole 34. There is an assembly gap between the guide body 23 and the wall of the pin hole 34, and the positioning body 24 and the wall of the pin hole 34 fit together tightly.

[0084] The working principle and beneficial effects of the above technical solution are as follows:

[0085] The conductive plate 30 is slidably mounted on the positioning pin 20. An assembly gap exists between the guide body 23 and the wall of the pin hole 34, ensuring that the conductive plate 30 can move up and down along the guide body. The positioning body 24 is tightly fitted to the wall of the pin hole 34, and a tapered surface is provided on the positioning body 24. When a positional deviation occurs during the sliding process of the conductive plate 30, under the rebound force of the elastic element 40, the pin hole 34 of the conductive plate 30 moves along the tapered surface of the guide body 23 until the conductive plate 30 returns to the same position. This structural design solves the problems of difficult positioning of the conductive plate 30 during inter-welding, slight changes in the position of the conductive plate 30 before and after welding, or assembly errors in the parts to be welded, ensuring that the conductive plate 30 and the parts to be welded 200 always maintain a tight fit.

[0086] Example 6:

[0087] like Figures 7-11 As shown, based on the above embodiment 3, an auxiliary positioning component is connected between the second platform of the base 11 and the pressure arm 12. The auxiliary positioning component includes:

[0088] Hinged base 400, the hinged base 400 is connected to the second platform of the base 11;

[0089] The stabilizing frame is rotatably connected to the hinge seat 400 at the bottom end and is hingedly connected to the pressing arm 12 at the top end, and the length of the stabilizing frame is set to be adjustable.

[0090] The working principle and beneficial effects of the above technical solution are:

[0091] During the use of the welding positioning fixture, the pressing arm 12 needs to be rotated to make the first transition plate 13 correspond to the second transition plate 14. By setting the auxiliary positioning assembly, the hinge seat 400 is set on the second platform, and the stabilizing frame is set in the hinge seat 400. When the pressing arm 12 is rotated, the stabilizing frame is elongated or shortened, and at the same time, the pressing arm 12 is rotated around the hinge seat 400, so that the pressing arm 12 is stable during rotation, and at the same time, it is ensured that the pressing arm 12 does not shift after positioning is completed, the position state of the first transition plate 13 and the second transition plate 14 is ensured, and the positioning accuracy of the conductive plate 30 is further ensured. The telescopic part at the upper part of the stabilizing frame is used to realize the elongation or shortening of the stabilizing frame, and the detection part at the lower part of the stabilizing frame can detect the position state of the pressing arm 12, which provides a basis for the rotation of the pressing arm 12 to the position and the offset condition.

[0092] Embodiment 7:

[0093] On the basis of the above-mentioned embodiment 6, the telescopic part comprises:

[0094] The cylinder 41 is provided with a guide sliding groove 42 on the side surface;

[0095] The stabilizing sliding block 44 is slidably connected in the cylinder 41, and the two sides thereof extend forward and backward through the guide sliding grooves 42 respectively; the top end of the stabilizing sliding block 44 is provided with a groove 45;

[0096] The telescopic frame 46 is arranged in an L shape, the bottom end of the telescopic frame 46 is connected to the stabilizing sliding block 44, and the top end of the telescopic frame 46 is hingedly connected to the pressing arm 12;

[0097] The adjusting screw 47 is screwed to the top end of the cylinder 41, and the adjusting screw 47 is coaxially arranged with the cylinder 41;

[0098] The adjusting block 48 is rotatably connected to the bottom end of the adjusting screw 47, and the adjusting block 48 is slidably arranged with the inner wall of the cylinder 41 without rotation;

[0099] The pressure adjusting spring 49 is installed in the groove 45 at one end and connected to the adjusting block 48 at the other end.

[0100] The working principle and beneficial effects of the above technical solution are:

[0101] When the pressing arm 12 rotates upward, the telescopic frame 46 is pulled to move upward, and the telescopic frame 46 drives the stable sliding block 44 to slide in the cylinder 41, and the guide sliding groove 42 guides the stable sliding block 44; during the movement of the stable sliding block 44, the compression pressure spring 49 is compressed, and under the elastic force of the spring, the telescopic frame 46 is always kept in a tension state, that is, the pressing arm 12 is always kept in a tension state during rotation; at the same time, with the rotation of the pressing arm 12, the telescopic frame 46 is rotated, and the detection part at the lower part of the cylinder 41 is also rotated, so that the state of the pressing arm 12 is flexibly adjusted. On the contrary, when the pressing arm 12 reverses, the stable sliding block 44 is quickly reset downward under the elastic force of the pressure spring 49, and the telescopic frame 46 pulls the pressing arm 12 to reset, so that the first transition plate 13 and the second transition plate 14 can be quickly positioned to the upper and lower corresponding state, so as to ensure accurate positioning and clamping.

[0102] The adjusting screw 47 is arranged on the cylinder 41, the adjusting block 48 is driven to move by rotating the adjusting screw 47, the adjusting block 48 presses the pressure spring 49 and changes the initial length of the pressure spring 49, so as to adjust the elastic force of the pressure spring 49, adapt to the clamping requirements of different to-be-welded parts 200, and reduce the damage to the surface of the to-be-welded part 200 by adjusting the clamping force while ensuring the stable clamping of the to-be-welded part 200.

[0103] Through the above structural design, the telescopic frame 46 connected elastically is used to tension the pressing arm 12, so that the pressing arm 12 is always kept in tension during rotation, and the to-be-welded part 200 is kept in a pressed state under the elastic force during positioning and clamping of the to-be-welded part 200, and the pressing force can be adjusted through the adjusting screw 47, so as to adapt to the clamping force requirements of to-be-welded parts 200 of different sizes and weights, and improve the adaptability of the device.

[0104] Embodiment 8:

[0105] On the basis of the above-mentioned embodiment 7, the inductive groove 43 is arranged at the inner bottom of the cylinder 41, and the inductive block 410 is arranged in the inductive groove 43, and the top detection end of the inductive block 410 abuts against the stable sliding block 44.

[0106] The working principle and beneficial effects of the above technical solution are as follows:

[0107] The inductive block 410 is arranged in the inductive groove 43, and the top of the inductive block 410 is a detection end; when the to-be-welded part 200 is positioned and clamped, the pressing arm 12 is rotated to the position, the stable sliding block 44 is located at the bottom end of the guide sliding groove 42, the stable sliding block 44 contacts the detection end of the inductive block 410, the inductive block 410 is triggered and sends a to-position signal to the controller, which indicates that the pressing arm 12 has been rotated to the position, and serves as a basis for starting the welding operation.

[0108] Embodiment 9:

[0109] On the basis of the above embodiment 8, the detection part comprises:

[0110] A first detection ring 411 is connected to the lower part of the cylinder 41;

[0111] A first conductive plate 412 is concentrically connected to the outside of the first detection ring 411;

[0112] A second detection ring 413 is concentrically arranged outside the first detection ring 411;

[0113] A second conductive plate 414 is concentrically connected to the inside of the second detection ring 413, and a gap is arranged between the first conductive plate 412 and the second conductive plate 414, and the first conductive plate 412 and the second conductive plate 414 are electrically connected to the controller;

[0114] A pull spring assembly 415 is arranged in two groups, and the two groups of pull spring assemblies 415 are respectively connected between the top of the second detection ring 413 and the cylinder 41 and between the bottom of the second detection ring 413 and the cylinder 41; a plurality of pull springs are arranged in the circumferential direction in the two groups of pull spring assemblies 415, and each pull spring is arranged obliquely;

[0115] A counterweight 416 is arranged inside the first detection ring 411 and the second detection ring 413;

[0116] A support ring 417 is concentrically connected to the outside of the second detection ring 413, and the support ring 417 is provided with a hinge shaft 418 in front and back, and the hinge shaft 418 is rotatably connected to the hinge holes in front and back of the hinge seat 400.

[0117] The working principle and beneficial effects of the above technical solution are:

[0118] When the detection part is detected, the second detection ring 413 is kept in a stable state under the elastic force of the pull spring assembly 415. The elastic force of the multiple pull springs in the pull spring assembly is equal and the length is equal, so that the second detection ring 413 is kept coaxial with the first detection ring 411. When the cylinder body 41 rotates, the second detection ring 413 slightly deflects and rotates with the cylinder body 41. The hinge shaft 418 on the support ring 417 rotates relative to the hinge seat 400, thereby realizing flexible rotation of the pressing arm 12. When clamped in place, if in a normal clamping state, the second detection ring 413 is balanced in each direction under the action of the pull spring assembly 415, so that the cylinder body 41 and the first detection ring 411 in the second detection ring 413 are in a neutral state. The first conductive plate 412 and the second conductive plate 414 keep a preset gap and do not contact. When the clamping position of the pressing arm 12 deviates, the cylinder body 41 and the first detection ring 411 deviate from the neutral state, that is, an angle of deviation is generated between the axes of the first conductive plate 412 and the second conductive plate 414. When the deflection exceeds a preset value, the first conductive plate 412 contacts the second conductive plate 414. After the current passes through the first conductive plate 412 and the second conductive plate 414, the circuit is conducted. The controller detects the electric signal, indicating that the position of the pressing arm 12 deviates and needs to be repaired.

[0119] Through the above structural design, the detection part is arranged at the lower part of the stabilizing frame. The first detection ring 411 and the second detection ring 413 are flexibly connected and keep a preset gap by using the arrangement of the two pull spring assemblies 415. The pull spring assembly 415 is used in cooperation with the pressure regulating spring 49, thereby improving the rotation stability and clamping positioning effect of the pressing arm 12. When the pressing arm 12 rotates upward, the state of the pressing arm 12 is detected by the induction block 410, indicating that the pressing arm 12 is not clamped in place at this time. The controller does not process the electric signal state of the first conductive plate 412 and the second conductive plate 414, that is, this time is a state without detection. When the pressing arm 12 is rotated to the position, the clamping in place state of the pressing arm 12 is detected by the induction block 410. The controller processes the electric signal state of the first conductive plate 412 and the second conductive plate 414 at this time, that is, this time is a detection state. When the first conductive plate 412 and the second conductive plate 414 generate an electric signal at this time, it indicates that the cylinder body 41 has been moved to the position. The first detection ring 411 and the second detection ring 413 have an angular deviation in the axis, that is, the pressing arm 12 has an angular deviation relative to the preset position. At this time, the upper and lower conductive plates 30 are not completely opposite, and a positioning deviation is generated. The state of the pressing arm 12 that is not accurately positioned for a long time can be identified, which is convenient for repair. On the other hand, during the welding process, as the welding position of the workpiece to be welded 200 changes, the center of gravity of the workpiece to be welded 200 also changes. The elastically arranged conductive plate 30 shakes, which acts on the pressing arm 12 to make it shake. Through the change of the axes of the first detection ring 411 and the second detection ring 413, the shaking of the pressing arm 12 can also be detected, which is convenient for real-time monitoring of the stable state of the pressing arm 12.

[0120] In the description of the application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0121] In the present application, unless otherwise clearly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or communicate with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0122] Although the embodiments of the present application have been disclosed as above, it is not limited to the application and implementation listed in the specification and embodiments, and it can be fully applied to various fields suitable for the present application, and additional modifications can be easily realized by those skilled in the art, and therefore the present application is not limited to specific details and the figures shown and described herein, without departing from the general concept defined by the claims and the equivalent scope.

Claims

1. An indirect dotting method, characterized by, include: A conductive plate (30) is movably mounted on the welding positioning fixture (100), and the conductive plate (30) can slide up and down; The workpiece to be welded (200) is clamped and positioned between the upper and lower conductive plates (30); Connect the electrode head of the welding torch (300) to the conductive plate (30); Start the welding gun (300) and simultaneously energize the conductive plate (30) to perform spot welding on the workpiece (200); The welding positioning fixture (100) includes: a support (10), a conductive plate (30), a positioning pin (20), and an elastic element (40). The positioning pin (20) is installed on the support (10), the conductive plate (30) is sleeved on the positioning pin (20) and slidably connected to the positioning pin (20), and the elastic element (40) is sleeved on the positioning pin (20) and elastically connected to the conductive plate (30). The axial direction of the positioning pin (20) is the same as the direction of the clamping force. The support (10) includes a base (11) and a pressure arm (12), which is rotatably connected to the top of the base (11); An auxiliary positioning component is connected between the base (11) and the pressure arm (12). The auxiliary positioning component includes: A hinged base (400) is attached to a base (11); The stabilizer has its bottom end rotatably connected to the hinge seat (400) and its top end hinged to the pressure arm (12). The length of the stabilizer can be extended or retracted. The stabilizer includes a detection part located at the bottom and a telescopic part located at the top. The detection part is rotatably connected to the hinge seat (400). The detection part is used to detect the position of the pressure arm (12). The telescopic part includes a cylindrical body (41), a sensing groove (43) is provided at the bottom of the cylindrical body (41), a sensing block (410) is provided in the sensing groove (43), and the top detection end of the sensing block (410) abuts against the stabilizing slider (44). The testing department includes: The first detection ring (411) is connected to the lower part of the cylinder (41); The first conductive plate (412) is concentrically connected to the outside of the first detection ring (411); The second detection ring (413) is concentrically arranged outside the first detection ring (411); The second conductive plate (414) is concentrically connected to the inner side of the second detection ring (413). A gap is provided between the second conductive plate (414) and the first conductive plate (412). The first conductive plate (412) and the second conductive plate (414) are electrically connected to the controller. The spring assembly (415) consists of two sets of spring assemblies (415) connected between the top of the second detection ring (413) and the cylinder (41), and between the bottom of the second detection ring (413) and the cylinder (41); each set of spring assemblies (415) includes multiple springs arranged along the circumferential direction, and each spring is inclined. The counterweight (416) is disposed inside the first detection ring (411) and the second detection ring (413); The support ring (417) is concentrically connected to the outside of the second detection ring (413) and has hinge shafts (418) at both the front and rear. The hinge shafts (418) are rotatably connected to the hinge holes at the front and rear of the hinge seat (400).

2. An indirect dotting method according to claim 1, wherein The support (10) further comprises a first transition plate (13) and a second transition plate (14), the bottom surface of the pressing arm (12) is provided with a first platform, one end of the first transition plate (13) is mounted on the first platform; the side surface of the base (11) is provided with a second platform, one end of the second transition plate (14) is mounted on the second platform; the first transition plate (13) and the second transition plate (14) are arranged in parallel; a gasket (15) is arranged between the first transition plate (13) and the first platform of the pressing arm (12), and a gasket (15) is arranged between the second transition plate (14) and the second platform of the base (11).

3. An indirect dotting method according to claim 2, wherein, The conductive plate (30) comprises an upper conductive plate (31) and a lower conductive plate (32), the upper conductive plate (31) is connected with the first transition plate (13) in a close manner, and the lower conductive plate (32) is connected with the second transition plate (14) in a close manner; the upper conductive plate (31) and the lower conductive plate (32) are respectively arranged on the upper side and the lower side of the workpiece (200) to be welded.

4. An indirect dotting method according to claim 3, wherein The upper conductive plate (31) and the lower conductive plate (32) are arranged in a symmetrical manner and have the same structure; the clamping ends of the upper conductive plate (31) and the lower conductive plate (32) are bent towards the center of the two, and a clamping space of the workpiece (200) to be welded is formed; the top surface of the clamping end of the upper conductive plate (31) and the bottom surface of the clamping end of the lower conductive plate (32) are provided with recesses (33); the recesses (33) are matched with the electrode head of the welding gun (300); the edges of the conductive plate (30) connected with the transition plate are provided with chamfers (35).

5. The method of indirect dotting according to claim 3, wherein, The positioning pin (20) comprises a threaded hole (21), a baffle (22), a guide body (23) and a positioning body (24); the baffle (22), the guide body (23) and the positioning body (24) are sequentially connected; the threaded hole (21) is arranged through the center of the baffle (22), the guide body (23) and the positioning body (24); a screw passes through the threaded hole (21) to mount the positioning pin (20) on the transition plate.

6. An indirect dotting method according to claim 5, wherein The conductive plate (30) is provided with a pin hole (34); the positioning pin (20) is connected with the transition plate by penetrating the pin hole (34); the elastic member (40) is sleeved on the positioning pin (20) and connected between the baffle (22) and the conductive plate (30); The positioning body (24) and the guide body (23) are in a cylindrical shape; the side of the positioning body (24) connected with the guide body (23) is provided with a tapered surface; the pin hole (34) is provided with a tapered surface corresponding to the positioning body (24); there is an assembly gap between the guide body (23) and the hole wall of the pin hole (34); the positioning body (24) is tightly matched with the hole wall of the pin hole (34).

7. The method of indirect dotting according to claim 1, wherein, The telescopic part further comprises: A stable sliding block (44) is slidingly connected in the cylinder (41); the side surface of the cylinder (41) is provided with a guide sliding groove (42); the two sides of the stable sliding block (44) extend forward and backward to the base (11) by penetrating the guide sliding groove (42); the top end of the stable sliding block (44) is provided with a groove (45); A telescopic frame (46) is arranged in an L shape; the bottom end of the telescopic frame (46) is connected with the stable sliding block (44); the top end of the telescopic frame (46) is hingedly connected with the pressing arm (12); An adjusting screw (47) is screwed on the top end of the cylinder (41); An adjusting block (48) is rotationally connected to the bottom end of the adjusting screw (47), and the adjusting block (48) slides with the inner wall of the cylinder (41) without rotation; A pressure regulating spring (49) is installed in the groove (45) at one end, and connected with the adjusting block (48) at the other end.

Images