Detection device for detecting welding quality of arc welding stud

Abstract

The invention relates to the technical field of welding quality detection, and discloses a detection device for detecting the welding quality of an arc welding stud, which comprises a mounting frame, a mounting seat is mounted on the mounting frame, a displacement sensor, a pressure sensor and a cylinder are mounted on the mounting seat, and the cylinder is provided with an output end. The output end of the air cylinder is connected with a hollow column; the device further comprises a pressure applying assembly, a marking assembly and a pigment supplementing assembly. Through cooperation of the pressure applying assembly, the displacement sensor, the air cylinder and the pressure sensor, a workpiece can pass through the installation frame on an automatic production line, welding quality detection is conducted through pressure applying of the pressure head, whether the workpiece is qualified or not is judged through detection of the displacement sensor, and the working step of quality detection is integrated into the automatic production line; and the continuity of workpiece production is optimized, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding quality detection, and particularly relates to a detection device for detecting the welding quality of drawn-arc welding studs. Background Art

[0002] Stud welding, as a common process in the field of connection, generally refers to a welding process in which one end of a stud is brought into contact with the surface of a plate or pipe fitting, an arc is struck by energization, and after the contact surface melts, a certain pressure is applied to the stud to complete the welding. This process has the characteristics of large welding penetration depth, high joint strength, and low requirements for the surface quality of workpieces, and is widely used in important industries such as automobiles, shipbuilding, locomotives, and aviation. After welding is completed, it is usually necessary to detect the welding quality. The existing detection methods mainly include visual inspection, bending inspection, torque inspection, and tensile inspection, etc. When detecting, it is necessary for workers to transfer the welded workpiece to the detection device and then manually operate the detection device to detect the workpiece.

[0003] However, in the prior art, the following problems exist: With the development of the existing technology, the degree of automation of the current production line is getting higher and higher, while the conventional stud welding detection still requires transferring the welded workpiece to offline for manual detection, resulting in the workpiece leaving the automated production line during detection, affecting the coherence of the entire production process. Moreover, manually using the detection device for detection requires steps such as clamping the workpiece, detecting, and transferring the workpiece, which takes a long time, affects the overall production efficiency, and also has a relatively high input of labor costs. Summary of the Invention

[0004] The purpose of the present invention is to provide a detection device for detecting the welding quality of drawn-arc welding studs in order to solve the above problems, and to overcome the defects of the prior art, as will be elaborated in the following text.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: A detection device for detecting the welding quality of drawn-arc welding studs provided by the present invention includes a mounting frame, on which a mounting seat is installed. A displacement sensor, a pressure sensor, and a cylinder are installed on the mounting seat. The cylinder has an output end, and the output end of the cylinder is connected to a hollow column. It further includes a pressing component for pressing the workpiece to detect the welding quality; a marking component for marking the workpieces with unqualified welding quality; a pigment replenishing component for automatically replenishing the pigment required by the marking component. The pressing component includes a pressing head that is slidably connected through the inner wall of the hollow column. A fixed ring is fixedly connected to the inner wall of the hollow column. One end of the pressing head close to the fixed ring is connected to a slider. A first spring is arranged between the slider and the hollow column. A touch button is installed on the fixed ring, and the slider contacts the touch button and the fixed ring when moving.

[0006] Preferably, the touch button is connected to the displacement sensor through a wire, the pressure sensor is provided with a pressure-bearing element, and the pressure-bearing element is arranged on the pressing head.

[0007] Preferably, the marking assembly includes a sliding tube, a printing head, a mounting shaft, a rotating rod, a first sliding shaft, a sliding rod, a second sliding shaft, a ratchet block, a sawtooth rack and an inclined plane rod. The sliding tube is slidably connected to the inner wall of the pressing head. The printing head is connected to one end of the sliding tube located inside the pressing head. A flow channel is provided through the inside of the sliding tube, and the printing head is connected to the flow channel of the sliding tube. The mounting shaft is connected to the inner wall of the hollow column. The rotating rod is rotatably mounted on the mounting shaft. The first sliding shaft is connected to the outer wall of the sliding tube. The sliding rod is connected to the side of the rotating rod close to the fixed ring. The second sliding shaft is connected to the top of the rotating rod. The ratchet block is connected to the bottom end of the second sliding shaft. The sawtooth rack is connected to the outer wall of the air cylinder. The inclined plane rod is connected to the side of the slider close to the fixed ring.

[0008] Preferably, a sliding groove is provided on the rotating rod, the first sliding shaft is slidably connected to the sliding groove of the rotating rod. The inclined plane rod passes through the fixed ring, and an inclined plane is provided at one end of the inclined plane rod away from the slider. The inclined plane of the inclined plane rod is in sliding contact with the second sliding shaft. An opening is provided on the hollow column, the rotating rod passes through the opening of the hollow column, and the ratchet block meshes with the sawtooth rack during movement.

[0009] Preferably, the marking assembly further includes a rotating frame, a clamping block and two steel sheets. The rotating frame is rotatably connected to the inner wall of the pressing head. The clamping block is connected to the rotating frame, and the two steel sheets are both mounted on the rotating frame.

[0010] Preferably, an annular inclined groove is provided on the sliding tube, the clamping block is slidably connected to the annular inclined groove, and the two steel sheets are both in contact with the outer surface of the end of the pressing head away from the air cylinder.

[0011] Preferably, the pigment replenishing assembly includes a buffer cylinder, a second spring, a liquid tank and a liquid pipe. The buffer cylinder is connected to the inner wall of the hollow column. One end of the sliding tube away from the pressing head is located inside the buffer cylinder, and the sliding tube is slidably connected to the buffer cylinder. The second spring is arranged between the inner wall of the buffer cylinder and the end of the sliding tube away from the pressing head. The liquid tank is mounted inside the hollow column, and the liquid pipe is connected between the liquid tank and the buffer cylinder.

[0012] Preferably, the pigment replenishing assembly further includes a liquid injection port. The liquid injection port is connected to the liquid tank, the liquid injection port penetrates through the hollow column, and check valves are respectively arranged in the liquid pipe and the flow channel of the sliding tube.

[0013] Preferably, the pigment replenishing component further includes a turntable, six spherical hinges, three connecting rods and a plurality of blades. The turntable is rotatably connected inside the buffer cylinder. Three of the spherical hinges are connected to the turntable, and the other three spherical hinges are connected to one end of the sliding tube located inside the buffer cylinder. One ends of the three connecting rods are respectively movably connected to the three spherical hinges on the turntable, and the other ends of the three connecting rods are respectively movably connected to the three spherical hinges on the sliding tube. The three connecting rods are all inclined, and the plurality of blades are all mounted on the turntable.

[0014] The beneficial effects are as follows: 1. For the detection device for detecting the welding quality of stud welding by arc welding, through the cooperation of the pressing component, displacement sensor, cylinder and pressure sensor, the workpiece can pass through the mounting frame on the automatic production line, and the welding quality is detected by the pressing of the pressing head. Whether the workpiece is qualified is judged by the detection of the displacement sensor. The work steps of quality detection are integrated into the automatic production line, optimizing the coherence of workpiece production, improving production efficiency, and reducing the labor cost input of manual detection.

[0015] 2. For the detection device for detecting the welding quality of stud welding by arc welding, through the setting of the marking component, when the workpiece quality is unqualified, the sliding tube can drive the printing head to mark on the surface of the workpiece, so as to facilitate subsequent workers to identify and sort unqualified workpieces; through the setting of the rotating frame and two steel sheets, the two steel sheets can rotate before and after the welding quality detection to remove impurities on the surface of the pressing head, avoiding a thick layer of impurities adhering to the surface after long-term use of the pressing head and affecting the detection accuracy.

[0016] 3. For the detection device for detecting the welding quality of stud welding by arc welding, through the setting of the pigment replenishing component, after each marking of the sliding tube and the printing head, the buffer cylinder can replenish the pigment into the printing head through the flow channel of the sliding tube, maintaining the saturation of the pigment in the printing head and ensuring the marking effect of the printing head; through the setting of a plurality of blades, when the printing head makes each mark, the plurality of blades can rotate to stir the pigment in the buffer cylinder, making the texture of the pigment more uniform and avoiding the situation of pigment precipitation and stratification, thereby affecting the marking quality. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic structural diagram of the mounting base of the present invention; Figure 3 It is a schematic structural diagram of the pressing component of the present invention; Figure 4 It is a schematic structural diagram of the marking component of the present invention; Figure 5 It is a schematic structural diagram of the pressing head of the present invention; Figure 6 It is a schematic structural diagram of the rotating frame of the present invention; Figure 7 It is a schematic structural diagram of the saw tooth bar of the present invention; Figure 8 It is a schematic structural diagram of the ratchet block of the present invention; Figure 9 It is a schematic structural diagram of the pigment replenishing component of the present invention; Figure 10 It is a schematic structural diagram of the liquid tank of the present invention; Figure 11 It is a schematic structural diagram of the turntable of the present invention.

[0019] Explanation of reference numerals in the drawings is as follows: 1. mounting frame; 2. mounting base; 3. displacement sensor; 4. cylinder; 41. output end; 5. pressure sensor; 6. hollow column; 7. pressing component; 71. pressing head; 72. slider; 73. fixed ring; 74. first spring; 75. touch button; 8. marking component; 81. sliding tube; 82. printing head; 83. mounting shaft; 84. rotating rod; 85. first sliding shaft; 86. sliding rod; 87. second sliding shaft; 88. ratchet block; 89. saw tooth bar; 810. inclined plane rod; 811. annular inclined groove; 812. rotating frame; 813. clamping block; 814. steel sheet; 9. pigment replenishing component; 91. buffer cylinder; 92. second spring; 93. liquid tank; 94. liquid injection port; 95. liquid pipe; 96. turntable; 97. spherical hinge; 98. connecting rod; 99. blade. Detailed implementation manners

[0020] To make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other implementation manners obtained by those of ordinary skill in the art without making creative efforts based on the embodiments of the present invention belong to the scope protected by the present invention.

[0021] Embodiment 1

[0022] Please refer to Figures 1-11, A detection device for detecting the welding quality of arc stud welding, including a mounting frame 1, which can be installed on an automated production line. After the workpiece is welded, it passes through the position of the mounting frame 1. A mounting seat 2 is installed on the mounting frame 1, and a displacement sensor 3, a pressure sensor 5 and a cylinder 4 are installed on the mounting seat 2. The displacement sensor 3 is a prior art, and its structure and working principle will not be elaborated too much. The cylinder 4 is provided with an output end 41, and the output end 41 of the cylinder 4 is connected to a hollow column 6; it also includes a pressing component 7 for pressing the workpiece to detect the welding quality; the pressing component 7 includes a pressing head 71, the pressing head 71 is slidably connected through the inner wall of the hollow column 6, and a fixed ring 73 is fixedly connected to the inner wall of the hollow column 6. One end of the pressing head 71 close to the fixed ring 73 is connected with a slider 72. A first spring 74 is arranged between the slider 72 and the hollow column 6. A touch button 75 is installed on the fixed ring 73. When the slider 72 moves, it contacts the touch button 75 and the fixed ring 73. The touch button 75 is connected to the displacement sensor 3 through a wire. The pressure sensor 5 is provided with a pressure-bearing element, and the pressure-bearing element is arranged on the pressing head 71. The pressure sensor 5 is a prior art, and its structure and working principle will not be elaborated too much. During detection, the cylinder 4 in the mounting seat 2 is started, and the output end 41 drives the hollow column 6 to approach the workpiece. When the pressing head 71 abuts against the workpiece, the pressing head 71 contracts into the hollow column 6 due to the reaction force of the workpiece. During the movement of the slider 72, it contacts and presses the touch button 75. After the touch button 75 is triggered, the displacement sensor 3 is started. The displacement sensor 3 can detect the relative movement distance between the hollow column 6 and the mounting seat 2. At this time, the cylinder 4 continues to output, and the pressure sensor 5 can detect the pressure applied by the pressing head 71 on the workpiece. When the pressure reaches the set value, the detection ends. During this process, the displacement sensor 3 can detect the distance that the hollow column 6 moves. When the distance of the hollow column 6 exceeds the set value, it means that the bending radian of the workpiece exceeds the set value, and it can be concluded that the welding quality of this workpiece is unqualified; through the cooperation of the pressing component 7, the displacement sensor 3, the cylinder 4 and the pressure sensor 5, the workpiece can pass through the position of the mounting frame 1 on the automated production line, and the welding quality is detected by the pressing of the pressing head 71. Whether the workpiece is qualified is judged by the detection of the displacement sensor 3. The working steps of quality detection are integrated into the automated production line, optimizing the continuity of workpiece production, improving production efficiency, and also reducing the labor cost input of manual detection.

[0023] Furthermore, there is a marking component 8 for marking workpieces with unqualified welding quality; the marking component 8 includes a sliding tube 81, a printing head 82, a mounting shaft 83, a rotating rod 84, a first sliding shaft 85, a sliding rod 86, a second sliding shaft 87, a ratchet block 88, a sawtooth rack 89 and an inclined plane rod 810. The sliding tube 81 is slidably connected to the inner wall of the pressure head 71, and the printing head 82 is connected to one end of the sliding tube 81 located inside the pressure head 71. A flow channel is provided through the inside of the sliding tube 81, and the printing head 82 is connected to the flow channel of the sliding tube 81. The mounting shaft 83 is connected to the inner wall of the hollow column 6, the rotating rod 84 is rotatably mounted on the mounting shaft 83, the first sliding shaft 85 is connected to the outer wall of the sliding tube 81, the sliding rod 86 is connected to the side of the rotating rod 84 close to the fixed ring 73, the second sliding shaft 87 is connected to the top of the rotating rod 84, the ratchet block 88 is connected to the bottom end of the second sliding shaft 87, the sawtooth rack 89 is connected to the outer wall of the air cylinder 4, and the inclined plane rod 810 is connected to the side of the slider 72 close to the fixed ring 73. A chute is provided on the rotating rod 84, and the first sliding shaft 85 is slidably connected to the chute of the rotating rod 84. The inclined plane rod 810 passes through the fixed ring 73, and an inclined plane is provided at one end of the inclined plane rod 810 away from the slider 72. The inclined plane of the inclined plane rod 810 is in sliding contact with the second sliding shaft 87. An opening is provided on the hollow column 6, and the rotating rod 84 passes through the opening of the hollow column 6. The ratchet block 88 meshes with the sawtooth rack 89 during movement. When the inclined plane rod 810 moves to the right, it drives the second sliding shaft 87 to move downward through its inclined plane. The second sliding shaft 87 drives the sliding rod 86 to move downward, and the sliding rod 86 drives the ratchet block 88 to move downward. After the ratchet block 88 moves downward, it contacts and meshes with the sawtooth rack 89. When the sliding rod 86 moves to the left, since the ratchet block 88 is meshed with the sawtooth rack 89, the ratchet block 88 cannot move to the left temporarily, which causes the sliding rod 86 and the rotating rod 84 to rotate counterclockwise around the mounting shaft 83. The rotating rod 84 drives the sliding tube 81 to slide leftward inside the pressure head 71 through the cooperation of the first sliding shaft 85 and the chute by using the lever principle. When the pressure head 71 moves leftward beyond the set value, that is, when the workpiece quality is unqualified, the printing head 82 on the sliding tube 81 contacts the workpiece. The printing head 82 adsorbs pigments, and the contact between the printing head 82 and the workpiece can print marks on the surface of the workpiece, thus achieving the effect of marking unqualified workpieces. Through the setting of the marking component 8, when the workpiece quality is unqualified, the sliding tube 81 can drive the printing head 82 to print marks on the surface of the workpiece, so as to facilitate subsequent workers to identify and sort unqualified workpieces.

[0024] Furthermore, the marking component 8 further includes a rotating frame 812, a clamping block 813, and two steel sheets 814. The rotating frame 812 is rotatably connected to the inner wall of the pressing head 71. The rotating frame 812 has a certain elasticity. The clamping block 813 is connected to the rotating frame 812. The two steel sheets 814 are both mounted on the rotating frame 812. The steel sheets 814 have a low thickness and a high hardness. An annular inclined groove 811 is formed in the sliding tube 81. The clamping block 813 is slidably connected to the annular inclined groove 811. The two steel sheets 814 are both in contact with the outer surface of the end of the pressing head 71 away from the air cylinder 4. When the rotating frame 812 moves, it drives the clamping block 813 to move. When the clamping block 813 moves, it slides in the annular inclined groove 811, so that the clamping block 813 is driven by the reaction force of the annular inclined groove 811 to drive the rotating frame 812 to rotate. When the rotating frame 812 rotates, it drives the two steel sheets 814 to rotate. Through the arrangement of the rotating frame 812 and the two steel sheets 814, the two steel sheets 814 can remove impurities on the surface of the pressing head 71 by rotating before and after welding quality inspection, avoiding the attachment of a thick layer of impurities on the surface of the pressing head 71 after long-term use and affecting the detection accuracy.

[0025] In addition, a pigment replenishing component 9 is used to automatically replenish the pigment required by the marking component 8. The pigment replenishing component 9 includes a buffer cylinder 91, a second spring 92, a liquid tank 93, and a liquid pipe 95. The buffer cylinder 91 is connected to the inner wall of the hollow column 6. One end of the sliding tube 81 away from the pressing head 71 is located inside the buffer cylinder 91. The sliding tube 81 is slidably connected to the buffer cylinder 91. The second spring 92 is arranged between the inner wall of the buffer cylinder 91 and the end of the sliding tube 81 away from the pressing head 71. The liquid tank 93 is mounted inside the hollow column 6. The liquid pipe 95 is connected between the liquid tank 93 and the buffer cylinder 91. The pigment replenishing component 9 further includes a liquid injection port 94. The liquid injection port 94 is connected to the liquid tank 93. The liquid injection port 94 penetrates through the hollow column 6. Pigment is injected into the liquid tank 93 through the liquid injection port 94. Check valves are respectively arranged in the flow channels of the liquid pipe 95 and the sliding tube 81. The check valves in the flow channels of the liquid pipe 95 and the sliding tube 81 can prevent the pigment from flowing back, enabling the pigment to flow in only one direction. The sliding tube 81 and the printing head 82 move leftward, so that a section of the sliding tube 81 located inside the buffer cylinder 91 extends outward. At this time, the liquid pressure in the buffer cylinder 91 decreases. The buffer cylinder 91 sucks the pigment in the liquid tank 93 into the buffer cylinder 91 through the liquid pipe 95. After the sliding tube 81 moves rightward and resets through the second spring 92, the liquid pressure in the buffer cylinder 91 increases, causing the pigment in the buffer cylinder 91 to enter the flow channel of the sliding tube 81 and thus replenish into the printing head 82. It achieves the effect that after each marking by the printing head 82, the pigment in the buffer cylinder 91 can be automatically replenished into the printing head 82. Through the arrangement of the pigment replenishing component 9, after each marking by the sliding tube 81 and the printing head 82, the buffer cylinder 91 can replenish the pigment into the printing head 82 through the flow channel of the sliding tube 81, maintaining the saturation of the pigment in the printing head 82 and ensuring the marking effect of the printing head 82.

[0026] In addition, the pigment replenishing component 9 further includes a turntable 96, six spherical hinges 97, three connecting rods 98 and a plurality of blades 99. The turntable 96 is rotatably connected inside the buffer cylinder 91. Three of the spherical hinges 97 are connected to the turntable 96, and the other three spherical hinges 97 are connected to one end of the sliding tube 81 located inside the buffer cylinder 91. One ends of the three connecting rods 98 are respectively movably connected to the three spherical hinges 97 on the turntable 96, and the other ends of the three connecting rods 98 are respectively movably connected to the three spherical hinges 97 on the sliding tube 81. The three connecting rods 98 are all inclined, and the three connecting rods 98 are inclined in a spiral shape. The plurality of blades 99 are all mounted on the turntable 96. When the sliding tube 81 moves leftward, it drives the three spherical hinges 97 above it to move leftward, so that the three spherical hinges 97 on the sliding tube 81 pull the left ends of the three connecting rods 98 to the left, making the inclined connecting rods 98 gradually parallel. The three connecting rods 98 drive the turntable 96 to rotate through the three spherical hinges 97 on the turntable 96. When the turntable 96 rotates, it drives the plurality of blades 99 to rotate. When the plurality of blades 99 rotate, they can stir the pigment in the buffer cylinder 91. Since the pigment may precipitate and stratify after being stationary for a period of time, through the stirring of the plurality of blades 99, the texture of the pigment can be made more uniform. Through the arrangement of the plurality of blades 99, every time the printing head 82 makes a mark, the plurality of blades 99 can rotate to stir the pigment in the buffer cylinder 91, making the texture of the pigment more uniform and avoiding the situation of pigment precipitation and stratification, so as not to affect the marking quality.

[0027] With the above structure, the following text will all refer to Figure 1In the up-down, front-back, left-right directions, the working principle of this case is that the mounting bracket 1 can be installed on an automated production line. After the workpiece is welded, it passes through the position of the mounting bracket 1 for welding quality inspection. During the inspection, the cylinder 4 in the mounting seat 2 is activated, and its output end 41 drives the hollow column 6 closer to the workpiece. When the pressing head 71 abuts against the workpiece, the pressing head 71 is pushed back by the workpiece and contracts into the hollow column 6. The slider 72 on the pressing head 71 approaches the fixed ring 73. During the movement of the slider 72, it contacts and presses the touch button 75, and then the slider 72 abuts against the fixed ring 73. After the touch button 75 is triggered, the displacement sensor 3 is activated. The displacement sensor 3 is a prior art, and its structure and working principle will not be elaborated too much. The displacement sensor 3 can detect the relative movement distance between the hollow column 6 and the mounting seat 2. Since the workpiece abuts against the pressing head 71 at this time, the pressing head 71 and the hollow column 6 cannot move further temporarily. At this time, the cylinder 4 continues to output. The pressure sensor 5 is a prior art, and its structure and working principle will not be elaborated too much. The pressure sensor 5 can detect the pressure exerted by the pressing head 71 on the workpiece. When the pressure reaches the set value, the detection ends. During this process, the workpiece may bend under pressure, and when the workpiece bends, the hollow column 6 and the pressing head 71 will move a certain distance. The displacement sensor 3 can detect the distance that the hollow column 6 moves. When the distance of the hollow column 6 exceeds the set value, it means that the bending radian of the workpiece exceeds the set value, and it can be concluded that the welding quality of this workpiece is unqualified. When the hollow column 6 does not move or the moving distance is less than the set value, it means that the welding quality of the workpiece is qualified. After the detection ends, the cylinder 4 contracts, and the pressing head 71 leaves the workpiece. The pressing head 71 is reset by the elastic force of the first spring 74; through the cooperation of the pressing component 7, the displacement sensor 3, the cylinder 4 and the pressure sensor 5, the workpiece can pass through the mounting bracket 1 on the automated production line, and the welding quality inspection is carried out by the pressing of the pressing head 71. Whether the workpiece is qualified is judged by the detection of the displacement sensor 3. The working steps of quality inspection are integrated into the automated production line, optimizing the coherence of workpiece production, improving production efficiency, and also reducing the labor cost input of manual inspection.

[0028] When the indenter 71 contracts into the hollow column 6, the sliding tube 81 remains stationary temporarily. The slider 72 drives the inclined rod 810 to move rightward. When the inclined rod 810 moves rightward, it drives the second sliding shaft 87 to move downward through its inclined surface. The second sliding shaft 87 drives the sliding rod 86 to move downward. The sliding rod 86 drives the ratchet block 88 to move downward. After the ratchet block 88 moves downward, it contacts the sawtooth rack 89. At this time, the slider 72 contacts the fixed ring 73, and the welding quality inspection starts. Since the sliding tube 81 is limited and cannot move rightward, but the sliding tube 81 can move leftward. Taking the workpiece on the left side of the indenter 71 as an example, when the workpiece bends, the hollow column 6 and the indenter 71 move leftward. Since the sawtooth rack 89 is connected to the outer wall of the cylinder 4 and the outer wall of the cylinder 4 does not move, relative movement is formed between the hollow column 6 and the sawtooth rack 89. When the hollow column 6 moves, it drives the rotating rod 84 to move leftward through the mounting shaft 83. The rotating rod 84 drives the sliding rod 86 to move leftward. When the sliding rod 86 moves leftward, since the ratchet block 88 is engaged with the sawtooth rack 89, the ratchet block 88 cannot move leftward temporarily, which causes the sliding rod 86 and the rotating rod 84 to rotate counterclockwise around the mounting shaft 83. The rotating rod 84 uses the lever principle to drive the sliding tube 81 to slide leftward in the indenter 71 through the cooperation of the first sliding shaft 85 and the chute. As the moving distance of the indenter 71 to the left increases, the sliding distance of the sliding tube 81 to the left in the indenter 71 also increases. When the indenter 71 moves leftward beyond the set value, that is, when the workpiece quality is unqualified, the printing head 82 on the sliding tube 81 contacts the workpiece. The printing head 82 adsorbs pigment, and the contact between the printing head 82 and the workpiece can print a mark on the surface of the workpiece, thus achieving the effect of marking unqualified workpieces. After the inspection is completed, the sliding tube 81 is reset by the elastic force of the second spring 92. A reset leaf spring is provided at the connection between the sliding rod 86 and the rotating rod 84. After the rotating rod 84 is reset, the sliding rod 86 is reset by the elastic force of the reset leaf spring;When the indenter 71 moves, a relative movement relationship is formed between the indenter 71 and the sliding tube 81. When the indenter 71 moves, it drives the rotating frame 812 to move. When the rotating frame 812 moves, it drives the clamping block 813 to move. When the clamping block 813 moves, it slides in the annular inclined groove 811, so that the clamping block 813 is subjected to the reaction force of the annular inclined groove 811 and drives the rotating frame 812 to rotate. When the rotating frame 812 rotates, it drives the two steel sheets 814 to rotate. Therefore, during the period from when the indenter 71 just contacts the workpiece to when the displacement sensor 3 is activated, the rotating frame 812 can drive the two steel sheets 814 to rotate by no more than 180 degrees. When the two steel sheets 814 rotate, they clean the contact surface between the workpiece and the indenter 71 in a contact manner, removing the impurities on the surface of the workpiece and preventing impurities from adhering to the surface of the indenter 71 and affecting the detection accuracy. After the detection is completed, when the indenter 71 returns to its original position, the two steel sheets 814 rotate again to clean the indenter 71 and maintain the cleanliness of the surface of the indenter 71. The steel sheets 814 are relatively thin and have high hardness. During the detection, they are clamped between the workpiece and the indenter 71. The rotating frame 812 has a certain elasticity. When the workpiece and the indenter 71 clamp the steel sheets 814, the rotating frame 812 can still rotate. During this process, the rotating frame 812 deforms. After the detection is completed, the rotating frame 812 returns to its original position through its own elasticity; through the setting of the marking component 8, when the quality of the workpiece is unqualified, the sliding tube 81 can drive the printing head 82 to print a mark on the surface of the workpiece, so as to facilitate subsequent workers to identify and sort out unqualified workpieces; through the setting of the rotating frame 812 and the two steel sheets 814, the two steel sheets 814 can rotate to remove the impurities on the surface of the indenter 71 before and after the welding quality detection, preventing a thick layer of impurities from adhering to the surface of the indenter 71 after long-term use and affecting the detection accuracy.

[0029] Pigment is injected into the liquid tank 93 through the liquid injection port 94. The pigment enters the buffer cylinder 91 through the liquid pipe 95. The buffer cylinder 91 is kept full of liquid. The pigment in the buffer cylinder 91 is transported to the print head 82 through the flow channel of the sliding pipe 81. The print head 82 absorbs the pigment to ensure the normal operation of the print head 82. When marking the print head 82, the sliding pipe 81 and the print head 82 move leftward, causing a section of the sliding pipe 81 inside the buffer cylinder 91 to extend outward. At this time, the liquid pressure in the buffer cylinder 91 decreases, and the buffer cylinder 91 sucks the pigment in the liquid tank 93 into the buffer cylinder 91 through the liquid pipe 95. An air vent valve is provided on the liquid tank 93 to keep the pressure in the liquid tank 93 at normal pressure. Check valves in the flow channels of the liquid pipe 95 and the sliding pipe 81 can prevent the pigment from flowing back, allowing the pigment to flow in only one direction. After the sliding pipe 81 moves rightward and resets through the second spring 92, the liquid pressure in the buffer cylinder 91 increases, causing the pigment in the buffer cylinder 91 to enter the flow channel of the sliding pipe 81 and thus be replenished into the print head 82. This achieves the effect that after each marking by the print head 82, the pigment in the buffer cylinder 91 can be automatically replenished into the print head 82; when the sliding pipe 81 moves leftward, it drives the three spherical hinges 97 above it to move leftward, causing the three spherical hinges 97 on the sliding pipe 81 to pull the left ends of the three connecting rods 98 to the left, making the inclined connecting rods 98 gradually parallel. The three connecting rods 98 are inclined in a spiral shape. Therefore, during the process of the three connecting rods 98 changing to parallel, the three connecting rods 98 drive the turntable 96 to rotate through the three spherical hinges 97 on the turntable 96. Similarly, when the sliding pipe 81 moves rightward and resets, the three connecting rods 98 drive the turntable 96 to rotate and reset. When the turntable 96 rotates, it drives multiple blades 99 to rotate. When the multiple blades 99 rotate, they can stir the pigment in the buffer cylinder 91. Since the pigment may settle and stratify after being stationary for a period of time, through the stirring of the multiple blades 99, the texture of the pigment can be made more uniform, avoiding the situation of sedimentation and stratification, which may affect the marking quality; through the setting of the pigment replenishment component 9, after each marking by the sliding pipe 81 and the print head 82, the buffer cylinder 91 can replenish the pigment into the print head 82 through the flow channel of the sliding pipe 81, maintaining the saturation of the pigment in the print head 82 and ensuring the marking effect of the print head 82; through the setting of the multiple blades 99, each time the print head 82 makes a mark, the multiple blades 99 can rotate to stir the pigment in the buffer cylinder 91, making the texture of the pigment more uniform and avoiding the situation of pigment sedimentation and stratification, which may affect the marking quality.

[0030] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A detection device for detecting the welding quality of arc stud welding, comprising a mounting frame (1), characterized in that: An installation base (2) is installed on the installation frame (1), and a displacement sensor (3), a pressure sensor (5) and a cylinder (4) are installed on the installation base (2). The cylinder (4) is provided with an output end (41), and the output end (41) of the cylinder (4) is connected to a hollow column (6). It further includes a pressing component (7) for pressing the workpiece to detect the welding quality. A marking component (8) for marking the workpieces with unqualified welding quality. A pigment replenishing component (9) for automatically replenishing the pigment required by the marking component (8). The pressing component (7) includes a pressing head (71). The pressing head (71) is slidably connected through the inner wall of the hollow column (6). A fixing ring (73) is fixedly connected to the inner wall of the hollow column (6). One end of the pressing head (71) close to the fixing ring (73) is connected to a slider (72). A first spring (74) is arranged between the slider (72) and the hollow column (6). A touch button (75) is installed on the fixing ring (73). When the slider (72) moves, it contacts the touch button (75) and the fixing ring (73).

2. The detection device for detecting the welding quality of arc stud welding according to claim 1, wherein: The touch button (75) is connected to the displacement sensor (3) through a wire. The pressure sensor (5) is provided with a pressure-bearing element, and the pressure-bearing element is arranged on the pressing head (71).

3. The detection device for detecting the welding quality of arc stud welding according to claim 1, wherein: The marking component (8) includes a sliding tube (81), a printing head (82), a mounting shaft (83), a rotating rod (84), a first sliding shaft (85), a sliding rod (86), a second sliding shaft (87), a ratchet block (88), a saw-tooth rack (89) and an inclined surface rod (810). The sliding tube (81) is slidably connected to the inner wall of the pressing head (71). The printing head (82) is connected to one end of the sliding tube (81) located inside the pressing head (71). A flow channel is arranged through the inside of the sliding tube (81). The printing head (82) is connected to the flow channel of the sliding tube (81). The mounting shaft (83) is connected to the inner wall of the hollow column (6). The rotating rod (84) is rotatably installed on the mounting shaft (83). The first sliding shaft (85) is connected to the outer wall of the sliding tube (81). The sliding rod (86) is connected to one side of the rotating rod (84) close to the fixing ring (73). The second sliding shaft (87) is connected to the top of the rotating rod (84). The ratchet block (88) is connected to the bottom end of the second sliding shaft (87). The saw-tooth rack (89) is connected to the outer wall of the cylinder (4). The inclined surface rod (810) is connected to one side of the slider (72) close to the fixing ring (73).

4. The inspection device for inspecting the welding quality of arc stud welding according to claim 3, wherein: A chute is arranged on the rotating rod (84). The first sliding shaft (85) is slidably connected to the chute of the rotating rod (84). The inclined surface rod (810) passes through the fixing ring (73). One end of the inclined surface rod (810) away from the slider (72) is provided with an inclined surface. The inclined surface of the inclined surface rod (810) is in sliding contact with the second sliding shaft (87). An opening is arranged on the hollow column (6). The rotating rod (84) passes through the opening of the hollow column (6). The ratchet block (88) meshes with the saw-tooth rack (89) during movement.

5. The detection device for detecting the welding quality of arc stud welding according to claim 4, wherein: The marking component (8) further includes a rotating frame (812), a clamping block (813) and two steel sheets (814). The rotating frame (812) is rotatably connected to the inner wall of the pressing head (71). The clamping block (813) is connected to the rotating frame (812). The two steel sheets (814) are both mounted on the rotating frame (812).

6. The inspection device for inspecting the welding quality of arc stud welding according to claim 5, characterized in that: An annular inclined groove (811) is formed in the sliding tube (81). The clamping block (813) is slidably connected to the annular inclined groove (811). The two steel sheets (814) are both in contact with the outer surface of the end of the pressing head (71) away from the air cylinder (4).

7. The detecting device for detecting the welding quality of arc stud welding according to claim 4, wherein: The pigment replenishing component (9) includes a buffer cylinder (91), a second spring (92), a liquid tank (93) and a liquid pipe (95). The buffer cylinder (91) is connected to the inner wall of the hollow column (6). The end of the sliding tube (81) away from the pressing head (71) is located inside the buffer cylinder (91). The sliding tube (81) is slidably connected to the buffer cylinder (91). The second spring (92) is arranged between the inner wall of the buffer cylinder (91) and the end of the sliding tube (81) away from the pressing head (71). The liquid tank (93) is mounted inside the hollow column (6). The liquid pipe (95) is connected between the liquid tank (93) and the buffer cylinder (91).

8. The inspection device for inspecting the welding quality of arc stud welding according to claim 7, characterized in that: The pigment replenishing component (9) further includes a liquid injection port (94). The liquid injection port (94) is connected to the liquid tank (93). The liquid injection port (94) penetrates through the hollow column (6). Check valves are respectively arranged in the flow channels of the liquid pipe (95) and the sliding tube (81).

9. The inspection device for inspecting the welding quality of arc stud welding according to claim 8, wherein: The pigment replenishing component (9) further includes a turntable (96), six spherical hinges (97), three connecting rods (98) and a plurality of blades (99). The turntable (96) is rotatably connected inside the buffer cylinder (91). Three of the spherical hinges (97) are connected to the turntable (96). The other three spherical hinges (97) are connected to the end of the sliding tube (81) located inside the buffer cylinder (91). One ends of the three connecting rods (98) are respectively movably connected to the three spherical hinges (97) on the turntable (96). The other ends of the three connecting rods (98) are respectively movably connected to the three spherical hinges (97) on the sliding tube (81). The three connecting rods (98) are all inclined. The plurality of blades (99) are all mounted on the turntable (96).

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