Welding positioning and detecting device and method for automobile sheet metal part

Abstract

The invention belongs to the technical field of sheet metal welding, and particularly relates to an automobile sheet metal part welding positioning and detecting device which comprises a vertical mounting plate, the vertical mounting plate is provided with a vertical sliding frame, the vertical sliding frame is connected with a sliding table, the sliding table is connected with arc-shaped guide rails, the arc-shaped guide rail on the upper side is connected with a first cylindrical sliding block, and the arc-shaped guide rail on the lower side is connected with a second cylindrical sliding block. The arc-shaped guide rail on the lower side is connected with a second cylindrical sliding block, the first cylindrical sliding block is provided with a first clamping jaw, the second cylindrical sliding block is provided with a second clamping jaw, the first cylindrical sliding block and the second cylindrical sliding block are sleeved with a ring sleeve, the ring sleeve is provided with a connecting rod, the connecting rod on the upper side is connected with a positioning sleeve, and the connecting rod on the lower side is connected with a push rod. The vertical installation plate is provided with a vertical sliding groove, the vertical sliding groove is connected with a sliding frame, and the sliding frame is provided with a visual detection module. The plane butt joint and cross butt joint device can be used for plane butt joint and cross butt joint of two plane sheet metal parts, is suitable for welding operation of the plane sheet metal parts at various angles, further integrates the function of weld joint detection and has various adjustability and functionality.

Description

Technical Field

[0001] The present invention belongs to the technical field of sheet metal welding, and particularly relates to a welding positioning and detection device for automotive sheet metal parts. Background Art

[0002] Sheet metal parts are a comprehensive cold working process for metal sheets (usually less than 6 mm), including shearing, punching, folding, welding, riveting, splicing, forming (such as automobile bodies), etc. Products processed by the sheet metal industry are called sheet metal parts. In the automotive industry, when welding regular planar sheet metal parts, people need to clamp and fix the planar sheet metal parts. During the welding process of planar sheet metal parts, according to design requirements, two welding methods, namely planar butt welding and cross butt welding, are required. However, the existing sheet metal welding clamping fixtures are too simple, with poor adjustability for planar sheet metal parts and unable to meet the requirements during welding. At the same time, there is no integrated corresponding weld appearance detection equipment, and the functionality is relatively single. Therefore, we propose a welding positioning and detection device for automotive sheet metal parts. Summary of the Invention

[0003] The purpose of the present invention is to provide a welding positioning and detection device for automotive sheet metal parts to solve the problems existing in the background art.

[0004] To achieve the above technical purpose, the technical solution adopted by the present invention is as follows:

[0005] A welding positioning and detection device for automotive sheet metal parts includes a vertical mounting plate. The vertical mounting plate is fixedly provided with a vertical sliding frame. Both the upper and lower ends of the vertical sliding frame are slidably connected with sliding tables. The vertical sliding frame is equipped with a first transmission mechanism for driving the two sliding tables to move closer and farther away from each other.

[0006] Both of the two sliding tables are fixedly connected with arc-shaped guide rails of the same specification. The two arc-shaped guide rails are symmetric in the up-down direction and offset in the front-back direction. A first cylindrical slider is slidably connected inside the upper arc-shaped guide rail, and a second cylindrical slider is slidably connected inside the lower arc-shaped guide rail. The first cylindrical slider is equipped with a first clamping claw, and the second cylindrical slider is equipped with a second clamping claw.

[0007] Both the first cylindrical slider and the second cylindrical slider are rotatably sleeved with ring sleeves. Both of the two ring sleeves are provided with connecting rods. The end of the upper connecting rod is rotatably connected with a positioning sleeve, and the end of the lower connecting rod is rotatably connected with a push rod. The push rod extends upward and slidably penetrates through the positioning sleeve. A locking member is provided between the lower arc-shaped guide rail and the second cylindrical slider.

[0008] Vertical sliding grooves are also formed on the left and right sides of the vertical mounting plate. A sliding frame is slidably connected to the two vertical sliding grooves. Visual inspection modules are installed at both ends of the sliding frame. A motor is installed at the rear of the vertical mounting plate. The output end of the motor is fixedly connected to a transmission screw rod, and the transmission screw rod is in threaded transmission connection with the sliding frame.

[0009] The first transmission mechanism includes a roller rotatably connected to the vertical sliding frame. The upper and lower sides of the roller are respectively processed into worms with opposite helix directions. The upper and lower ends of the sliding table are processed with transmission teeth respectively matching the two worms. A first operating handle is fixedly arranged at one end of the roller.

[0010] The rear end of the first clamping jaw is fixedly connected to a first adjusting slider. The first cylindrical slider is fixedly connected to a vertically extending first sliding cavity. The first sliding cavity is located in the radial direction of the upper arc-shaped guide rail. The first adjusting slider is slidably connected to the first sliding cavity. A first adjusting screw rod is installed in the first sliding cavity. The first adjusting screw rod penetrates through the first adjusting slider and is in threaded connection with the first adjusting slider. A second operating handle is arranged at the end of the first adjusting screw rod.

[0011] One side of the lower arc-shaped guide rail is processed with angle scales. One side of the second cylindrical slider is processed with an indicating arrow corresponding to the angle scales. The second cylindrical slider is also provided with an L-shaped mounting block. The locking member is a locking bolt assembled in the L-shaped mounting block. A friction surface is bonded to one side of the arc-shaped guide rail corresponding to the locking bolt. A rubber friction head is bonded to the end of the locking bolt.

[0012] The first clamping jaw and the second clamping jaw both include an assembly block, a clamping frame, two clamping blocks and two groups of elastic connection components;

[0013] The assembly block and the clamping frame of the first clamping jaw are integrally formed and fixed, and the assembly block is fixedly connected to the first adjusting slider. The two clamping blocks are slidably connected to the inside of the clamping frame. Each clamping block is elastically connected to the clamping frame through two groups of elastic connection components;

[0014] The assembly block and the clamping frame of the second clamping jaw are movably connected. The assembly block is fixedly connected to the first cylindrical slider. A second sliding cavity extending forward and backward is formed inside the assembly block. The clamping frame is provided with a second adjusting slider matching the second sliding cavity. A second adjusting screw rod is also installed in the second sliding cavity. The second adjusting screw rod penetrates through the second adjusting slider and is in threaded connection with the second adjusting slider. The two clamping blocks are slidably connected to the inside of the clamping frame. Each clamping block is elastically connected to the clamping frame through two groups of elastic connection components.

[0015] Each group of the elastic connection components includes a plurality of springs, a plurality of positioning rods and a connecting block. Each of the positioning rods slides through the clamping frame, one end of each of the positioning rods is fixedly connected to the clamping block and the other end is fixedly connected to the connecting block, each of the springs is respectively sleeved on the outside of each of the positioning rods, and both ends of each of the springs are respectively fixedly connected to the connecting block and the outer wall of the clamping frame.

[0016] The two connecting blocks of the first clamping jaw and the two connecting blocks of the second clamping jaw are both equipped with Z-shaped handles.

[0017] A method for using a welding positioning and detection device for an automobile sheet metal part, the method comprising a planar butt welding method and a cross butt welding method;

[0018] The planar butt welding method comprises the following steps:

[0019] Step S100: clamping two planar sheet metal parts by a first clamping claw and a second clamping claw respectively, and not distinguishing the lengths of the planar sheet metal parts clamped by the first clamping claw and the second clamping claw during planar butt welding;

[0020] Step S200: driving the two planar sheet metal parts clamped by the first clamping claw and the second clamping claw to approach each other until docking is completed by using the first transmission mechanism;

[0021] Step S300: operating the second adjusting screw rod to adjust the staggered distance of the two planar sheet metal parts as needed, and not adjusting if no adjustment is needed;

[0022] Step S400: Single-sided or double-sided welding of two planar sheet metal parts is performed according to the process requirements, and after welding is completed, the appearance of the weld is inspected by a visual inspection module.

[0023] The cross butt welding method comprises the following steps:

[0024] Step S100: clamping two planar sheet metal parts by a first clamping claw and a second clamping claw respectively, wherein the first clamping claw clamps the planar sheet metal part with a longer length, and the second clamping claw clamps the planar sheet metal part with a shorter length. If the two planar sheet metal parts have the same size, no distinction is made;

[0025] Step S200: operating the push rod to determine the angle between the two planar sheet metal parts, and after adjustment, the first transmission mechanism drives the two planar sheet metal parts clamped by the first clamping claw and the second clamping claw to approach each other until docking is completed;

[0026] Step S300: operating the first adjusting screw to adjust the weld position of the two planar sheet metal parts as needed, and operating the second adjusting screw to adjust the staggered distance of the butt joint of the two planar sheet metal parts as needed, and not adjusting if no adjustment is needed;

[0027] Step S400: Single-sided or double-sided welding of two planar sheet metal parts is performed according to the process requirements, and after welding is completed, the appearance of the weld is inspected by a visual inspection module.

[0028] The present invention can be used for planar butt jointing and cross butt jointing of two planar sheet metal parts, and is therefore suitable for welding operations of planar sheet metal parts at various angles, and also integrates a weld detection function, and has a variety of adjustability and functionality. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention is further illustrated by means of the non-limiting examples given in the accompanying drawings.

[0030] Figure 1 The structure of the first embodiment of the present invention is shown in FIG. Figure 1 ;

[0031] Figure 2 for Figure 1 A schematic diagram of the structure at A;

[0032] Figure 3 for Figure 1 A schematic diagram of the structure at B;

[0033] Figure 4 The structure of the first embodiment of the present invention is shown in FIG. Figure 2 ;

[0034] Figure 5 for Figure 4 A schematic diagram of the structure at position C of FIG.

[0035] Figure 6 The structure of the first embodiment of the present invention is shown in FIG. Figure 3 ;

[0036] Figure 7 for Figure 6 A schematic diagram of the structure at D of FIG.

[0037] Figure 8 for Figure 6 A schematic diagram of the structure at E of FIG.

[0038] Figure 9 It is a schematic diagram of the present invention during flat butt welding;

[0039] Figure 10 is A schematic diagram of the present invention during cross-butt welding;

[0040] Figure 11Schematic diagram for adjusting the staggered distance between two flat sheet metal parts during welding of the present invention;

[0041] The main component symbols are explained as follows:

[0042] Vertical mounting plate 100, vertical sliding frame 101, sliding table 102, arc-shaped guide rail 103, first cylindrical slider 104, second cylindrical slider 105, first clamping jaw 110, first adjusting slider 111, first sliding cavity 112, first adjusting screw 113, second operating handle 114, second clamping jaw 120, angle scale 121, indicating arrow 122, L-shaped mounting block 123, locking bolt 124, friction surface 125, rubber friction head 126, collar 130, connecting rod 131, positioning sleeve 132, push rod 133, vertical sliding groove 140, sliding frame 141, vision detection module 142, motor 143, transmission screw 144, roller 150, worm 151, transmission tooth 152, first operating handle 153;

[0043] Assembly block 200, clamping frame 201, clamping block 202, second sliding cavity 203, second adjusting slider 204, second adjusting screw 205, spring 210, positioning rod 211, connecting block 212, Z-shaped handle 220. Detailed implementation manners

[0044] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below with reference to the drawings and embodiments.

[0045] Embodiment 1, as Figures 1 to 8 shown, a welding positioning and detection device for automobile sheet metal parts includes a vertical mounting plate 100. The vertical mounting plate 100 is fixedly provided with a vertical sliding frame 101. Both the upper and lower ends of the vertical sliding frame 101 are slidably connected with a sliding table 102. The vertical sliding frame 101 is provided with a first transmission mechanism for driving the two sliding tables 102 to move closer and farther away. In this structure, the vertical mounting plate 100 is used to be hung on positions such as a wall, and through the first transmission mechanism, the sliding tables 102 at both the upper and lower ends of the vertical sliding frame 101 can move closer and move farther away.

[0046] Both of the two sliding platforms 102 are fixedly connected with arc-shaped guide rails 103 of the same specification. The two arc-shaped guide rails 103 are symmetric with each other in the up-and-down direction and offset from each other in the front-and-back direction. A first cylindrical slider 104 is slidably connected inside the upper arc-shaped guide rail 103, and a second cylindrical slider 105 is slidably connected inside the lower arc-shaped guide rail 103. A first clamping jaw 110 is installed on the first cylindrical slider 104, and a second clamping jaw 120 is installed on the second cylindrical slider 105. In this embodiment, one end of the arc-shaped guide rail 103 is fixed to the sliding platform 102 and the extending direction of the other end extends towards the middle of the vertical sliding frame 101. In this structure, the first clamping jaw 110 is used to clamp a flat sheet metal part, and at the same time, it can utilize the sliding of the first cylindrical slider 104 in the upper arc-shaped guide rail 103 to change the angle of the clamped sheet metal part. Similarly, the second clamping jaw 120 is used to clamp another flat sheet metal part, and at the same time, it can utilize the sliding of the second cylindrical slider 105 in the lower arc-shaped guide rail 103 to change the angle of the clamped sheet metal part.

[0047] Both the first cylindrical slider 104 and the second cylindrical slider 105 are rotatably sleeved with ring sleeves 130. Both of the two ring sleeves 130 are provided with connecting rods 131. The end of the upper connecting rod 131 is rotatably connected with a positioning sleeve 132, and the end of the lower connecting rod 131 is rotatably connected with a push rod 133. The push rod 133 extends upward and slidably penetrates through the positioning sleeve 132. A locking member is provided between the lower arc-shaped guide rail 103 and the second cylindrical slider 105. In this structure, by pushing the push rod 133, the two connecting rods 131 connected to the push rod 133 respectively push the first cylindrical slider 104 and the second cylindrical slider 105. Since the two arc-shaped guide rails 103 have the same specification, when the push rod 133 is pushed, the movement of the first cylindrical slider 104 in the upper arc-shaped guide rail 103 will be synchronized with the movement of the second cylindrical slider 105 in the lower arc-shaped guide rail 103. Figure 1 Taking the perspective of [description missing in the original] as an example, the flat sheet metal part clamped by the first clamping jaw 110 will be flipped clockwise, and the flat sheet metal part clamped by the second clamping jaw 120 will be flipped counterclockwise, and the flipping angles of the two clamped flat sheet metal parts are the same. In this way, the cross angle between the two flat sheet metal parts can be adjusted, and the locking member is used for locking and fixing to avoid loosening.

[0048] Vertical mounting plates 100 are also provided with vertical sliding grooves 140 on both the left and right sides. A sliding frame 141 is slidably connected to the two vertical sliding grooves 140 together. Visual inspection modules 142 are installed at both ends of the sliding frame 141. A motor 143 is installed at the rear side of the vertical mounting plate 100. The output end of the motor 143 is fixedly connected to a transmission screw 144. The transmission screw 144 is in threaded transmission connection with the sliding frame 141. In this structure, by controlling the start / stop of the motor 143 and the rotation direction of the output end, the rotation direction of the transmission screw 144 is changed. By using the threaded transmission between the transmission screw 144 and the sliding frame 141, the sliding frame 141 can be driven to reciprocate up and down along the vertical sliding grooves 140, so that the visual inspection modules 142 on both sides can visually inspect the welding positions of two planar sheet metal parts.

[0049] Before the device is used, as Figures 1 to 8 shown, the following steps are carried out for preparation:

[0050] Preparation step ①: By pulling the push rod 133, the first clamping jaw 110 is placed on one side of the upper arc-shaped guide rail 103 corresponding to the first cylindrical slider 104, and the second clamping jaw 120 is placed on one side of the lower arc-shaped guide rail 103 corresponding to the second cylindrical slider 105. At this time, the first clamping jaw 110 and the second clamping jaw 120 are in the same vertical straight line direction.

[0051] Preparation step ②: And by starting the motor 143, the sliding frame 141 is raised to the highest position.

[0052] Preparation step ③: Clamp one planar sheet metal part with the first clamping jaw 110 and clamp the other planar sheet metal part with the second clamping jaw 120.

[0053] When the device is in use, the following steps are carried out:

[0054] Use step ①: When performing butt welding of two planar sheet metal parts, as Figure 9 shown, without adjusting the push rod 133, the upper and lower slide tables 102 are moved closer through the first transmission mechanism, so that the first clamping jaw 110 and the second clamping jaw 120 are moved closer, making the two clamped planar sheet metal parts approach each other until butt welding is completed, and then welding is carried out after butt welding is completed.

[0055] During this process, since the upper and lower arc-shaped guide rails 103 are staggered in the front and rear directions, the movement of the first clamping jaw 110 and the second clamping jaw 120 closer will not be hindered.

[0056] Use step ②: When performing cross butt welding of two planar sheet metal parts, as as shown in Figure 10As shown, adjust the push rod 133 to make the two flat sheet metal parts flip to the desired angle. After reaching the required angle, use the first transmission mechanism to move the sliders 102 at the upper and lower ends closer, so that the first clamping jaw 110 and the second clamping jaw 120 move closer, making the two clamped flat sheet metal parts approach each other until docking is completed. After docking is completed, welding is carried out;

[0057] After welding is completed, proceed as follows:

[0058] Detection step ①: The motor 143 drives the transmission screw 144 to rotate. Using the screw drive between the transmission screw 144 and the carriage 141, the carriage 141 can be driven to slide downward along the vertical chute 140 until the visual detection modules 142 on both sides are at the weld position. Then the motor 143 stops rotating, and the welds of the flat sheet metal parts are detected by the visual detection modules 142 on both sides. After detection is completed, the carriage 141 is controlled to return to its original position.

[0059] The technical solution of this embodiment can be used for the flat docking and cross docking of two flat sheet metal parts, so as to be applicable to the welding operations of flat sheet metal parts at various angles. It also integrates the function of weld detection and has various adjustability and functionality.

[0060] As a further description of the first transmission mechanism in this embodiment, as Figures 4 to 5 shown, the first transmission mechanism includes a roller 150 rotatably connected to the vertical carriage 101. The upper and lower sides of the roller 150 are respectively machined into worms 151 with opposite helix directions. The sliders 102 at the upper and lower ends are machined with transmission teeth 152 respectively matching the worms 151 on both sides. One end of the roller 150 is fixedly provided with a first operation handle 153.

[0061] By using the first operation handle 153, the roller 150 and the worms 151 with opposite helix directions on both sides are rotated. In this way, through the transmission between the worm 151 and the transmission teeth 152, only by changing the rotation direction of the roller 150, the sliders 102 at the upper and lower ends can be made to move closer to and away from each other.

[0062] As a further description of the first clamping jaw in this embodiment, as Figure 1 、 Figure 3 and as shown in Figure 10As shown, a first adjustment slider 111 is fixedly connected to the rear end of the first clamping jaw 110. A first cylindrical slider 104 is fixedly connected to a vertically extending first sliding cavity 112. The first sliding cavity 112 is located in the radial direction of the upper arc-shaped guide rail 103. The first adjustment slider 111 is slidably connected to the first sliding cavity 112. The first sliding cavity 112 is provided with a first adjustment screw 113. The first adjustment screw 113 passes through the first adjustment slider 111 and is threadedly connected to the first adjustment slider 111. A second operating handle 114 is provided at the end of the first adjustment screw 113.

[0063] The purpose of such a design is that when cross-docking two flat sheet metal parts with different lengths, the longer flat sheet metal part is clamped by the first clamping jaw 110. After cross-docking the two flat sheet metal parts with different lengths through step ② of the use procedure, the first adjustment screw 113 can be rotated by operating the second operating handle 114, so that the first adjustment slider 111 moves in the first sliding cavity 112, and then the cross-welding position between the longer flat sheet metal part clamped by the first clamping jaw 110 and the shorter flat sheet metal part is adjusted.

[0064] As an explanation of the positioning of the included angle between the two sheet metal parts in this embodiment, as Figure 2 and Figure 5 shown, an angle scale 121 is machined on one side of the lower arc-shaped guide rail 103. An indicating arrow 122 corresponding to the angle scale 121 is machined on one side of the second cylindrical slider 105. The second cylindrical slider 105 is further provided with an L-shaped mounting block 123. The locking member is a locking bolt 124 assembled in the L-shaped mounting block 123. A friction surface 125 is bonded to the side of the arc-shaped guide rail 103 corresponding to the locking bolt 124. A rubber friction head 126 is bonded to the end of the locking bolt 124.

[0065] During the operation of the push rod 133, the indicating arrow 122 corresponding to the second cylindrical slider 105 can view the flipping angle through the angle scale 121 of the arc-shaped guide rail 103. When flipped to the required angle, by screwing in the locking bolt 124, the rubber friction head 126 at the end of the locking bolt 124 tightly abuts against the friction surface 125 of the arc-shaped guide rail 103, so that the second cylindrical slider 105 is locked and no longer moves under the action of friction, and then the push rod 133 is locked. The first clamping jaw 110 and the second clamping jaw 120 will no longer move and be locked, completing the adjustment of the angle.

[0066] In this embodiment, the structures of the first clamping jaw and the second clamping jaw are further described. As Figure 6 、 Figure 8 and Figure 11As shown, the first clamping jaw 110 and the second clamping jaw 120 both include an assembly block 200, a clamping frame 201, two clamping blocks 202, and two sets of elastic connection components;

[0067] The assembly block 200 and the clamping frame 201 of the first clamping jaw 110 are integrally formed and fixed, and the assembly block 200 is fixedly connected to the first adjustment slider 111. The two clamping blocks 202 are slidably connected to the inside of the clamping frame 201, and each clamping block 202 is elastically connected to the clamping frame 201 through two sets of elastic connection components;

[0068] The assembly block 200 and the clamping frame 201 of the second clamping jaw 120 are movably connected. The assembly block 200 is fixedly connected to the first cylindrical slider 104. A second sliding cavity 203 extending forward and backward is formed inside the assembly block 200. The clamping frame 201 is provided with a second adjustment slider 204 that matches the second sliding cavity 203. The second sliding cavity 203 is also provided with a second adjustment screw 205. The second adjustment screw 205 passes through the second adjustment slider 204 and is threadedly connected to the second adjustment slider 204. The two clamping blocks 202 are slidably connected to the inside of the clamping frame 201, and each clamping block 202 is elastically connected to the clamping frame 201 through two sets of elastic connection components.

[0069] When the first clamping jaw 110 and the second clamping jaw 120 perform clamping, by overcoming the elastic force of the elastic connection components, the two clamping blocks 202 in the clamping frame 201 are separated, and then the flat sheet metal part is inserted between the two clamping blocks 202. Finally, the elastic return force of the elastic connection components causes the two clamping blocks 202 to clamp the flat sheet metal part, and the operation is simple and convenient;

[0070] Moreover, by movably connecting the assembly block 200 and the clamping frame 201 of the second clamping jaw 120, it is also possible to adjust the staggered distance between two flat sheet metal parts after docking. During specific adjustment, by operating the second adjustment screw 205, the second adjustment slider 204 slides in the second sliding cavity 203, and thus the staggered distance between the flat sheet metal part clamped by the second clamping jaw 120 and the flat sheet metal part clamped by the first clamping jaw 110 can be adjusted.

[0071] Preferably, as Figure 7 and Figure 8As shown, each set of elastic connection components includes a number of springs 210, a number of positioning rods 211, and a connection block 212. Each positioning rod 211 slidably penetrates through the clamping frame 201. One end of each positioning rod 211 is fixedly connected to the clamping block 202 and the other end is fixedly connected to the connection block 212. Each spring 210 is respectively sleeved outside each positioning rod 211. Both ends of each spring 210 are fixedly connected to the connection block 212 and the outer wall of the clamping frame 201. Z-shaped handles 220 are installed on the two connection blocks 212 of the first clamping jaw 110 and the two connection blocks 212 of the second clamping jaw 120.

[0072] When clamping, by firmly holding the two Z-shaped handles 220 and moving them closer to each other, the two connection blocks 212 can be made to move relatively away from the clamping frame 201, thereby pulling the springs 210 and pulling the two clamping blocks 202 away from each other and opening them through the positioning rods 211. After releasing the Z-shaped handles 220, the two clamping blocks 202 can clamp the flat sheet metal part under the elastic force of the springs 210, which is convenient for use.

[0073] Embodiment 2 provides a method of using a welding positioning and detection device for automotive sheet metal parts on the basis of Embodiment 1, including a flat butt welding method and a cross butt welding method;

[0074] The flat butt welding method includes the following steps:

[0075] Step S100: Clamp two flat sheet metal parts respectively by the first clamping jaw 110 and the second clamping jaw 120. When performing flat butt welding, the lengths of the flat sheet metal parts clamped by the first clamping jaw 110 and the second clamping jaw 120 are not distinguished.

[0076] Step S200: Drive the two flat sheet metal parts clamped by the first clamping jaw 110 and the second clamping jaw 120 to move closer to each other until butt joint is completed through the first transmission mechanism;

[0077] Step S300: Operate the second adjusting screw 205 as required to adjust the staggered distance of the butt joint of the two flat sheet metal parts. If no adjustment is required, no adjustment is made;

[0078] Step S400: Weld the two flat sheet metal parts on one side or both sides according to the process requirements. After welding is completed, perform visual inspection on the appearance of the weld seam through the visual inspection module 142.

[0079] The cross butt welding method includes the following steps:

[0080] Step S100: clamp two planar sheet metal parts by the first clamping claw 110 and the second clamping claw 120 respectively, the first clamping claw 110 clamps the planar sheet metal part with a longer length, and the second clamping claw 120 clamps the planar sheet metal part with a shorter length. If the two planar sheet metal parts have the same size, no distinction is made;

[0081] Step S200: operating the push rod 133 to determine the angle between the two planar sheet metal parts, and after adjustment, driving the two planar sheet metal parts clamped by the first clamping claw 110 and the second clamping claw 120 to approach each other through the first transmission mechanism until the two planar sheet metal parts are docked;

[0082] Step S300: operate the first adjusting screw 113 to adjust the weld position of the two planar sheet metal parts as needed, and operate the second adjusting screw 205 to adjust the staggered distance of the butt joint of the two planar sheet metal parts as needed. If no adjustment is needed, no adjustment is performed;

[0083] Step S400: Single-sided or double-sided welding of two planar sheet metal parts is performed according to the process requirements, and after welding is completed, the appearance of the weld is inspected by the visual inspection module 142 .

[0084] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A welding positioning and detection device for automobile sheet metal parts, comprising a vertical mounting plate, characterized in that: The vertical mounting plate is fixedly provided with a vertical slide, the upper and lower ends of the vertical slide are slidably connected with slides, and the vertical slide is equipped with a first transmission mechanism for driving the two slides to move closer and farther; The two slides are fixedly connected with arc-shaped guide rails of the same specification, the two arc-shaped guide rails are symmetrical to each other in the up-down direction and staggered to each other in the front-back direction, a first cylindrical slider is slidably connected inside the upper arc-shaped guide rail, and a second cylindrical slider is slidably connected inside the lower arc-shaped guide rail, the first cylindrical slider is installed with a first clamping claw, and the second cylindrical slider is installed with a second clamping claw; The first cylindrical slider and the second cylindrical slider are both rotatably sleeved with ring sleeves, and the two ring sleeves are both provided with connecting rods, the upper connecting rod end is rotatably connected to a positioning sleeve, and the lower connecting rod end is rotatably connected to a push rod, the push rod extends upward and slides through the positioning sleeve, and a locking piece is provided between the lower arc guide rail and the second cylindrical slider; Vertical slide grooves are also provided on the left and right sides of the vertical mounting plate, and the vertical slide grooves on both sides are slidably connected to a slide frame, and visual inspection modules are installed at both ends of the slide frame. A motor is installed on the rear side of the vertical mounting plate, and a transmission screw is fixedly connected to the output end of the motor. The transmission screw and the slide frame are threadedly connected.

2. The welding positioning and detection device for automobile sheet metal parts according to claim 1, characterized in that: The first transmission mechanism includes a roller rotatably connected to the vertical slide, the upper and lower sides of the roller are respectively processed into worms with opposite rotation directions, the slides at the upper and lower ends are processed with transmission teeth respectively matching the worms on both sides, and a first operating handle is fixedly set at one end of the roller.

3. The welding positioning and detection device for automobile sheet metal parts according to claim 2, characterized in that: A first adjusting slider is fixedly connected to the rear end of the first clamping claw, and a first cylindrical slider is fixedly connected to a vertically extending first sliding cavity. The first sliding cavity is located in the radial direction of the upper arc guide rail, and the first adjusting slider is slidingly connected to the first sliding cavity. A first adjusting screw is installed in the first sliding cavity, and the first adjusting screw passes through the first adjusting slider and is threadedly connected to the first adjusting slider. A second operating handle is provided at the end of the first adjusting screw.

4. The welding positioning and detection device for automobile sheet metal parts according to claim 3, characterized in that: One side of the lower arc guide rail is processed with an angle scale, and one side of the second cylindrical slider is processed with an indicator arrow corresponding to the angle scale. The second cylindrical slider is also provided with an L-shaped mounting block, and the locking piece is a locking bolt assembled on the L-shaped mounting block. A friction surface is bonded to the side of the arc guide rail corresponding to the locking bolt, and a rubber friction head is bonded to the end of the locking bolt.

5. The welding positioning and detection device for automobile sheet metal parts according to claim 4, characterized in that: The first clamping claw and the second clamping claw each include an assembly block, a clamping frame, two clamping blocks and two sets of elastic connection components; The assembly block of the first clamping claw is integrally formed and fixed with the clamping frame, and the assembly block is fixedly connected to the first adjusting slider, the two clamping blocks are slidably connected to the inside of the clamping frame, and each of the clamping blocks is elastically connected to the clamping frame through two groups of elastic connection components; The assembly block of the second clamping claw is movably connected to the clamping frame, and the assembly block is fixedly connected to the first cylindrical slider. A second sliding cavity extending forward and backward is opened inside the assembly block, and a second adjusting slider matching the second sliding cavity is installed on the clamping frame. The second sliding cavity is also equipped with a second adjusting screw, and the second adjusting screw passes through the second adjusting slider and is threadedly connected to the second adjusting slider. The two clamping blocks are slidably connected to the inside of the clamping frame, and each of the clamping blocks is elastically connected to the clamping frame through two groups of elastic connection components.

6. The welding positioning and detection device for automobile sheet metal parts according to claim 5, characterized in that: Each group of the elastic connection components includes a plurality of springs, a plurality of positioning rods and a connecting block. Each of the positioning rods slides through the clamping frame, one end of each of the positioning rods is fixedly connected to the clamping block and the other end is fixedly connected to the connecting block, each of the springs is respectively sleeved on the outside of each of the positioning rods, and both ends of each of the springs are respectively fixedly connected to the connecting block and the outer wall of the clamping frame.

7. The welding positioning and detection device for automobile sheet metal parts according to claim 6, characterized in that: The two connecting blocks of the first clamping jaw and the two connecting blocks of the second clamping jaw are both equipped with Z-shaped handles.

8. A method for using the welding positioning and detection device for automobile sheet metal parts according to any one of claims 1 to 7, characterized in that: The use method includes a flat butt welding method and a cross butt welding method; The planar butt welding method comprises the following steps: Step S100: clamping two planar sheet metal parts by a first clamping claw and a second clamping claw respectively, and not distinguishing the lengths of the planar sheet metal parts clamped by the first clamping claw and the second clamping claw during planar butt welding; Step S200: driving the two planar sheet metal parts clamped by the first clamping claw and the second clamping claw to approach each other until docking is completed by using the first transmission mechanism; Step S300: operating the second adjusting screw rod to adjust the staggered distance of the two planar sheet metal parts as needed, and not adjusting if no adjustment is needed; Step S400: Single-sided or double-sided welding of two planar sheet metal parts is performed according to the process requirements, and after welding is completed, the appearance of the weld is inspected by a visual inspection module. The cross butt welding method comprises the following steps: Step S100: clamping two planar sheet metal parts by a first clamping claw and a second clamping claw respectively, wherein the first clamping claw clamps the planar sheet metal part with a longer length, and the second clamping claw clamps the planar sheet metal part with a shorter length. If the two planar sheet metal parts have the same size, no distinction is made; Step S200: operating the push rod to determine the angle between the two planar sheet metal parts, and after adjustment, the first transmission mechanism drives the two planar sheet metal parts clamped by the first clamping claw and the second clamping claw to approach each other until docking is completed; Step S300: operating the first adjusting screw to adjust the weld position of the two planar sheet metal parts as needed, and operating the second adjusting screw to adjust the staggered distance of the butt joint of the two planar sheet metal parts as needed, and not adjusting if no adjustment is needed; Step S400: Single-sided or double-sided welding of two planar sheet metal parts is performed according to the process requirements, and after welding is completed, the appearance of the weld is inspected by a visual inspection module.

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