Spot welding perpendicularity detection device, detection method thereof and body-in-white welding production line

Abstract

The application provides a spot welding perpendicularity detection device, a detection method thereof and a body-in-white welding production line, relates to the technical field of welding processing aids, and comprises a support fixing clamp which is detachably clamped to a welding tongs electrode, a groove is formed on the surface of the support fixing clamp along a vertical direction, a detection rod which is parallel to the electrode rod of the welding tongs is connected in the groove, one end of the detection rod away from the groove is hinged to an offset degree indicator, and the offset degree indicator is magnetically connected to the surface of a part to be welded. The application solves the technical problem that the welding tongs electrode is not perpendicular to the welding surface, which causes the welding spot to be distorted, achieves the technical effect that whether the welding tongs electrode is perpendicular to the welding surface is quickly detected and verified, and the appearance quality of the welding spot and the welding spot connection strength are improved.

Description

Technical Field

[0001] This invention relates to the field of welding processing auxiliary equipment technology, and in particular to a spot welding verticality detection device and its detection method, and a body-in-white welding production line. Background Technology

[0002] The manufacturing of the automotive body-in-white is part of the overall vehicle production process. Welding, as a key connection technology in body-in-white assembly, directly determines the structural strength, overall vehicle safety, and appearance quality. Resistance spot welding has become the most widely used welding method in automotive body-in-white manufacturing. With the rapid development of intelligent automotive manufacturing, robotic automated spot welding production lines have become the mainstream production model.

[0003] Currently, during spot welding operations using robotic welding machines in automotive body-in-white, the perpendicularity detection and verification of the welding electrode to the welding surface mainly relies on the visual observation and practical experience of the operators. Operators adjust the welding clamp angle based on their personal experience and observation of the electrode posture.

[0004] However, existing methods of visually judging perpendicularity are prone to angular deviations and cannot accurately guarantee the perpendicularity of the electrode to the welding surface. Non-perpendicular electrodes directly cause weld point distortion, reducing the weld's appearance quality, significantly weakening the weld connection strength, and affecting the welding quality of the body-in-white and the overall vehicle structural safety. Summary of the Invention

[0005] The purpose of this invention is to provide a spot welding verticality detection device and its detection method, as well as a body-in-white welding production line, to alleviate the technical problem of weld point distortion caused by the welding clamp electrode not being perpendicular to the welding surface in the prior art.

[0006] The spot welding verticality detection device provided by the present invention includes: a bracket fixing clamp, a detection rod, and an offset indicator; The bracket clamp is detachably clamped to the welding clamp electrode. The surface of the bracket clamp has a groove along the vertical direction, and a detection rod is connected in the groove and is arranged parallel to the welding clamp electrode rod. The end of the detection rod away from the groove is hinged to the offset indicator, which is magnetically connected to the surface of the part to be welded.

[0007] Furthermore, the bracket fixing clamp includes two clamping blocks with identical structures, and the opposite surfaces of the two clamping blocks are provided with semi-circular clamping holes that penetrate their vertical direction. The two semi-circular clamping holes are arranged on a plane with a first magnet for mutual attraction, which together surrounds the welding clamp electrode; the diameter of the cylinder formed by the two semi-circular clamping holes is 0.03 to 0.05 mm larger than the diameter of the welding clamp electrode.

[0008] Furthermore, the groove is formed on the side of each clamping block opposite to the semi-circular clamping hole, and / or on any side adjacent to the semi-circular clamping hole.

[0009] Furthermore, a second magnet is provided in the groove for magnetic attraction with the detection rod.

[0010] Furthermore, a first circular hole is provided on the surface of the end of the detection rod near the offset indicator; The offset indicator has a double triangular shape on both sides, and a second circular hole is opened on both sides of the offset indicator. The detection rod and the offset indicator are connected by a pin in the first and second circular holes.

[0011] Furthermore, the surface of the detection rod is engraved with a longitudinal detection groove, and the center line of the detection groove is at the same horizontal line as the center of the detection rod; The depth of the detection groove is 0.5mm to 1mm, and the width of the detection groove is 0.3mm to 0.5mm.

[0012] Furthermore, a third magnet is provided at the bottom of the offset indicator, and the end face of the third magnet is attached to the surface of the part to be welded.

[0013] The present invention provides a method for detecting the verticality of spot welds, which uses the aforementioned spot weld verticality detection device and includes the following steps: Step 1: Fix the bracket clamp to the welding electrode rod; Step 2: Magnetically connect the detection rod to the bracket fixing clamp to position the detection rod on the outside of the welding clamp electrode rod; Step 3: Attach the offset indicator magnetically to the welding surface of the part to be welded; Step 4: Determine whether the welding clamp electrode is perpendicular to the welding surface by the relative position relationship between the offset indicator and the detection rod; adjust the welding clamp electrode posture according to the perpendicularity result.

[0014] The white body welding production line provided by the present invention includes the above-mentioned spot weld verticality detection device.

[0015] Beneficial effects: The spot welding perpendicularity detection device, detection method, and body-in-white welding production line provided by this invention adopt a detachable clamping bracket, a detection rod arranged parallel to the welding clamp electrode rod, and an offset indicator hinged to the end of the detection rod and magnetically attached to the surface of the part to be welded. This allows for visual determination of the perpendicularity between the welding clamp electrode and the welding surface, replacing traditional manual visual inspection and experience-based judgment, eliminating subjective errors in manual inspection, and achieving rapid and accurate verification of the welding clamp electrode perpendicularity.

[0016] The spot welding verticality detection device provided by this invention is easy to install and disassemble, does not interfere with the movement trajectory of the welding clamp during robot teaching, and the bracket fixing clamp can be flexibly adjusted to adapt to different detection positions. At the same time, it can effectively avoid the problem of weld point distortion caused by non-perpendicular electrodes, significantly improve the appearance quality and connection strength of weld points in automotive body spot welding, ensure the stability of welding process, and is suitable for universal use in spot welding projects of multiple vehicle models. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the spot welding verticality detection device provided in an embodiment of the present invention; Figure 2 This is a front view of the clamping block in the spot welding verticality detection device provided in an embodiment of the present invention; Figure 3 This is a rear view of the clamping block in the spot welding verticality detection device provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the detection rod in the spot welding verticality detection device provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the offset indicator in the spot welding verticality detection device provided in an embodiment of the present invention; Figure 6 A schematic diagram showing the positions of the detection rod and the offset indicator in the spot welding verticality detection device provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the body-in-white welding production line in the spot welding verticality detection device provided in an embodiment of the present invention; Figure 8 This is a flowchart of a spot welding verticality detection method provided in an embodiment of the present invention.

[0019] Icons: 1-Bracket fixing clip; 101-Clamping block; 102-Semi-circular clamping hole; 103-First magnet; 104-Second magnet; 2-Detection rod; 201-First circular hole; 202-Detection groove; 3-Offset indicator; 301-Second circular hole; 302-Third magnet; 4-Groove. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0027] like Figure 1 As shown, the spot welding verticality detection device provided by the present invention includes: a bracket fixing clamp 1, a detection rod 2, and an offset indicator 3; The bracket clamp 1 is detachably clamped to the welding clamp electrode. The surface of the bracket clamp 1 has a groove 4 in the vertical direction. A detection rod 2 is connected in the groove 4 and is arranged parallel to the welding clamp electrode rod. The end of the detection rod 2 away from the groove 4 is hinged to the offset indicator 3, and the offset indicator 3 is magnetically connected to the surface of the part to be welded.

[0028] Specifically, the bracket clamp 1 is detachably held in a clamping manner around the outer periphery of the welding clamp electrode rod. One or two elongated grooves 4 are machined vertically on the outer surface of the bracket clamp 1. The extending axis of the grooves 4 is parallel to the central axis of the welding clamp electrode rod. The detection rod 2 is fitted into the grooves 4 and arranged parallel to the welding clamp electrode rod. The bracket clamp 1 and the detection rod 2 are detachably fixedly connected via a built-in magnetic attraction component. The bracket clamp 1 can rotate 360° around the welding clamp electrode rod and can also slide freely up and down along the electrode rod axis, allowing the detection rod 2 to be flexibly adjusted to any detection position and height. The end of the detection rod 2 furthest from the groove 4 forms a hinged structure with the offset indicator 3 via a pin. The offset indicator 3 can freely deflect and swing relative to the detection rod 2 around the hinge point. The bottom end face of the offset indicator 3 is magnetically attached to the surface of the part to be welded via a built-in magnet, ensuring that the offset indicator 3 always maintains a fixed posture with the welding surface as the reference.

[0029] This invention combines detachable clamping, parallel positioning, hinge linkage, and magnetic reference positioning to achieve rapid assembly and disassembly of the detection device without occupying work space or interfering with the movement trajectory of the robot welding clamp. It also allows for intuitive judgment of perpendicularity by observing the relative angle between the detection rod and the offset indicator, replacing manual visual judgment and eliminating detection errors.

[0030] In embodiments of the present invention, such as Figure 2 , Figure 3 As shown, the bracket fixing clamp 1 includes two clamping blocks 101 with the same structure. The opposite surfaces of the two clamping blocks 101 are provided with semi-circular clamping holes 102 that penetrate their vertical direction. Two semi-circular clamping holes 102 are provided on the plane where the first magnet 103 for mutual attraction is arranged to jointly surround the welding clamp electrode; the diameter of the cylinder formed by the two semi-circular clamping holes 102 is 0.03 to 0.05 mm larger than the diameter of the welding clamp electrode.

[0031] The groove 4 is formed on the side of each clamping block 101 opposite to the semi-circular clamping hole 102, and / or on any side adjacent to the semi-circular clamping hole 102.

[0032] A second magnet 104 is provided in the groove 4 for magnetic attraction with the detection rod 2.

[0033] Specifically, the bracket fixing clamp 1 is composed of two identical clamping blocks 101 spliced ​​together. Each clamping block 101 has a semi-circular clamping hole 102 extending vertically along its mating surface. The two semi-circular clamping holes 102 together form a cylindrical clamping cavity for holding the welding clamp electrode rod. The inner diameter of the cylindrical clamping cavity formed by the two semi-circular clamping holes 102 is 0.03–0.05 mm larger than the outer diameter of the welding clamp electrode rod. Preferably, the dimensional difference is 0.05 mm, which ensures that the clamping block 101 can rotate freely around the electrode rod and slide smoothly along it, while preventing clamping gaps to avoid detection and positioning deviations. Each clamping block 101 has a first magnet 103 embedded in its mating surface where the semi-circular clamping holes 102 are located. The first magnets 103 attract each other, allowing for quick and easy clamping of the welding clamp electrode rod without the need for additional fasteners such as bolts or clips.

[0034] The groove 4 is formed on the outer surface of the clamping block 101. It can be opened individually on the side of each clamping block 101 opposite to the semi-circular clamping hole 102, or it can be opened simultaneously on any side adjacent to the semi-circular clamping hole 102, adapting to the scenario requirements of assembling the detection rod 2 in multiple directions and angles. A second magnet 104 is embedded inside the groove 4. The magnetic end face of the second magnet 104 is flush with the groove end face of the groove 4. It can be detachably connected with the detection rod 2 through magnetic attraction, which not only ensures that the detection rod 2 and the welding clamp electrode rod are always arranged in parallel, but also allows for flexible adjustment of the assembly position of the detection rod 2 to meet the detection and debugging requirements of different welding points.

[0035] In embodiments of the present invention, such as Figure 4 , Figure 5 and Figure 6 As shown, a first circular hole 201 is provided on one end surface of the detection rod 2 near the offset indicator 3; the two sides of the offset indicator 3 are in the shape of a double triangle, and a second circular hole 301 is provided on both sides of the offset indicator 3; the detection rod 2 and the offset indicator 3 are connected by a pin in the first circular hole 201 and the second circular hole 301.

[0036] The surface of the detection rod 2 is engraved with a longitudinal detection groove 202, the center line of which is at the same horizontal line as the center of the detection rod 2; the depth of the detection groove 202 is 0.5mm to 1mm, and the width of the detection groove 202 is 0.3mm to 0.5mm.

[0037] The bottom of the offset indicator 3 is provided with a third magnet 302, and the end face of the third magnet 302 is adsorbed onto the surface of the part to be welded.

[0038] Specifically, the surface of the detection rod 2 near the offset indicator 3 has a first circular hole 201, which is a smooth, coaxial through hole with clean, burr-free walls. The offset indicator 3 has a symmetrical double-triangular shape on both sides, with corresponding second circular holes 301 on its two side surfaces. The second circular holes 301 are coaxial with the first circular holes 201 and have the same diameter. The detection rod 2 and the offset indicator 3 are connected by a through pin within the first circular holes 201 and the second circular holes 301 to form a movable hinge fit. The surface of the detection rod 2 is engraved longitudinally. There is a detection groove 202, the center line of which is at the same horizontal reference line as the central axis of the detection rod 2. The depth of the detection groove 202 is 0.5mm to 1mm, preferably 1mm, and the width of the detection groove 202 is 0.3mm to 0.5mm, preferably 0.5mm. A third magnet 302 is embedded in the bottom of the offset indicator 3. The adsorption end face of the third magnet 302 is completely flush with the bottom end face of the offset indicator 3. The magnet is firmly embedded and tightly adsorbed onto the surface of the part to be welded.

[0039] When the welding clamp electrode slips, the detection rod 2 will also shift, and the detection groove 202 and the apex of the triangle of the offset indicator 3 will not be on the same horizontal line. At this time, the welding clamp electrode needs to be adjusted to correct the verticality.

[0040] like Figure 7 As shown, the white body welding production line provided by the present invention includes the spot weld verticality detection device in the above embodiment.

[0041] Specifically, this invention can be applied to the body-in-white welding production line of C100PHEV, C100-10, C095-10, E001, E202, C206, E115-04, D357, D359, P567, and VW491. Through actual use, it can quickly detect whether the welding clamp electrode is perpendicular to the welding surface.

[0042] like Figure 8 As shown, the spot weld perpendicularity detection method provided by the present invention uses the spot weld perpendicularity detection device in the above embodiment and includes the following steps: Step 1: Clamp and fix the bracket fixing clamp 1 onto the welding clamp electrode rod; Step 2: Magnetically connect the detection rod 2 to the bracket fixing clamp 1, so that the detection rod 2 is positioned on the outside of the welding clamp electrode rod; Step 3: Magnetically attach the offset indicator 3 to the welding surface of the part to be welded; Step 4: Determine whether the welding clamp electrode is perpendicular to the welding surface by the relative position relationship between the offset indicator 3 and the detection rod 2; adjust the welding clamp electrode posture according to the perpendicularity result.

[0043] Specifically, the bracket clamp 1 is first fixed to the preset detection position of the welding clamp electrode rod by magnetic attraction of the built-in magnet, ensuring that the clamp is firm and the position can be flexibly adjusted. Then, the detection rod 2 is precisely magnetically connected to the second magnet in the groove on the outside of the bracket clamp 1, so that the detection rod 2 is positioned on the outside of the electrode rod in a state parallel to the welding clamp electrode rod. Then, the offset indicator 3 is tightly and smoothly magnetically attached to the reference position of the welding surface of the part to be welded by the third magnet at the bottom. By observing the relative position and angle correspondence between the offset indicator 3 and the detection groove 202 on the surface of the detection rod 2, the perpendicularity of the welding clamp electrode to the welding surface can be judged intuitively and accurately. Based on the detected perpendicularity deviation, the posture angle of the welding clamp electrode is adjusted in real time until the electrode and the welding surface reach the perpendicularity standard, thus completing the perpendicularity detection and calibration before spot welding.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spot weld verticality detection device, characterized in that, include: The bracket fixing clamp (1), the detection rod (2), and the offset indicator (3) are included. The bracket fixing clamp (1) is detachably clamped to the welding clamp electrode. The bracket fixing clamp (1) has a groove (4) in the vertical direction on its surface. The detection rod (2) is connected in the groove (4) and is arranged parallel to the welding clamp electrode rod. The end of the detection rod (2) away from the groove (4) is hinged to the offset indicator (3), and the offset indicator (3) is magnetically connected to the surface of the part to be welded.

2. The spot weld verticality detection device according to claim 1, characterized in that, The bracket fixing clamp (1) includes two clamping blocks (101) with the same structure. The opposite surfaces of the two clamping blocks (101) are provided with semi-circular clamping holes (102) that penetrate their vertical direction. The two semi-circular clamping holes (102) are provided with a first magnet (103) for mutual attraction, which together surrounds the welding clamp electrode; the diameter of the cylinder formed by the two semi-circular clamping holes (102) is 0.03 to 0.05 mm larger than the diameter of the welding clamp electrode.

3. The spot weld verticality detection device according to claim 2, characterized in that, The groove (4) is formed on the side of each clamping block (101) opposite to the semi-circular clamping hole (102), and / or on any side adjacent to the semi-circular clamping hole (102).

4. The spot weld verticality detection device according to claim 3, characterized in that, A second magnet (104) is provided in the groove (4) for magnetic attraction with the detection rod (2).

5. The spot weld verticality detection device according to claim 1, characterized in that, The detection rod (2) has a first circular hole (201) on one end surface near the offset indicator (3); The offset indicator (3) has a double triangular shape on both sides. The two sides of the offset indicator (3) are provided with second circular holes (301). The detection rod (2) and the offset indicator (3) are connected by pins in the first circular hole (201) and the second circular hole (301).

6. The spot weld verticality detection device according to claim 1, characterized in that, The surface of the detection rod (2) is engraved with a longitudinal detection groove (202), and the center line of the detection groove (202) is at the same horizontal line as the center of the detection rod (2); The depth of the detection groove (202) is 0.5mm to 1mm, and the width of the detection groove (202) is 0.3mm to 0.5mm.

7. The spot weld verticality detection device according to claim 1, characterized in that, The offset indicator (3) has a third magnet (302) at its bottom, and the end face of the third magnet (302) is attached to the surface of the part to be welded.

8. A method for detecting the verticality of spot welds, characterized in that, This method uses the spot weld verticality detection device according to any one of claims 1-7, and includes the following steps: Step 1: Fix the bracket fixing clamp (1) onto the welding clamp electrode rod; Step 2: Magnetically connect the detection rod (2) to the bracket fixing clamp (1) so that the detection rod (2) is positioned outside the welding clamp electrode rod; Step 3: Magnetically attach the offset indicator (3) to the welding surface of the part to be welded; Step 4: Determine whether the welding clamp electrode is perpendicular to the welding surface by the relative position relationship between the offset indicator (3) and the detection rod (2); adjust the posture of the welding clamp electrode according to the perpendicularity result.

9. A white body welding production line, characterized in that, The device includes the spot weld verticality detection device according to any one of claims 1-7.

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