A detection device for detecting the welding quality of drawn arc welding studs

Abstract

The present invention relates to the technical field of welding quality detection, and discloses a detection device for detecting the welding quality of drawn arc welding studs, comprising a mounting frame, a mounting seat mounted on the mounting frame, a displacement sensor, a pressure sensor, and a cylinder mounted on the mounting seat, the cylinder being provided with an output end, the output end of the cylinder being connected to a hollow column; a pressure component, a marking component, and a pigment replenishing component. By cooperating with the pressure component, the displacement sensor, the cylinder, and the pressure sensor, a workpiece can pass through the mounting frame on an automated production line, and the welding quality can be detected by applying pressure from a pressure head. The workpiece is then judged to be qualified by detection by the displacement sensor. The quality detection work steps are integrated into the automated production line, thereby optimizing the continuity of workpiece production and improving production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of welding quality detection, and in particular to a detection device for detecting the welding quality of a drawn arc welding stud. Background Art

[0002] Stud welding, as a common process in the field of connection, usually refers to a welding process in which one end of the stud is brought into contact with the surface of a plate or pipe, an arc is struck by electricity, and after the contact surface is melted, a certain pressure is applied to the stud to complete the welding. This process has the characteristics of deep welding penetration, high joint strength, and low requirements for the surface quality of the workpiece. It is widely used in important industries such as automobiles, shipbuilding, locomotives, and aviation. After welding is completed, the welding quality usually needs to be tested. The existing testing methods mainly include visual inspection, bend inspection, torque inspection, and tension inspection. During the inspection, the staff needs to transfer the welded workpiece to the inspection device, and then manually operate the inspection device to inspect the workpiece.

[0003] However, the existing technology has the following problems:

[0004] With the development of existing technologies, the degree of automation of current production lines is getting higher and higher. However, conventional stud welding inspection still requires the completed workpiece to be transferred offline for manual inspection, which means that the workpiece needs to leave the automated production line during inspection, affecting the continuity of the entire production process. In addition, manual inspection using inspection equipment requires steps such as clamping the workpiece, inspection, and transporting the workpiece, which is time-consuming, affecting overall production efficiency and increasing labor costs. Summary of the Invention

[0005] 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 overcome the defects of the prior art, as described in detail below.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] The present invention provides a detection device for detecting the welding quality of arc welding studs, comprising a mounting frame, a mounting seat being installed on the mounting frame, a displacement sensor, a pressure sensor and a cylinder being installed on the mounting seat, the cylinder being provided with an output end, and the output end of the cylinder being connected to a hollow column; further comprising a pressure-applying component for applying pressure to a workpiece for welding quality detection; a marking component for marking a workpiece with unqualified welding quality; and a pigment replenishing component for automatically replenishing the pigment required by the marking component; the pressure-applying component comprises a pressure head, the pressure head is slidably connected to the inner wall of the hollow column, the inner wall of the hollow column is fixedly connected to a fixing ring, a slider is connected to one end of the pressure head close to the fixing ring, a first spring is provided between the slider and the hollow column, a touch button is installed on the fixing ring, and the slider contacts the touch button and the fixing ring when moving.

[0008] Preferably, the touch button is connected to the displacement sensor via a wire, and the pressure sensor is provided with a pressure-bearing element, which is provided on the pressure head.

[0009] 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 serrated bar and a bevel rod, the sliding tube is slidably connected to the inner wall of the pressure head, the printing head is connected to one end of the sliding tube located inside the pressure head, a flow channel is provided through the interior of the sliding tube, 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 installed 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 serrated bar is connected to the outer wall of the cylinder, and the bevel rod is connected to the side of the slider close to the fixed ring.

[0010] Preferably, a sliding groove is provided on the rotating rod, the first sliding shaft is slidingly connected to the sliding groove of the rotating rod, the inclined rod passes through the fixing ring, the inclined rod is provided with an inclined surface at the end away from the slider, the inclined surface of the inclined 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 engages with the serrated bar during movement.

[0011] Preferably, the marking assembly further comprises a rotating frame, a clamping block and two steel sheets, the rotating frame is rotatably connected to the inner wall of the pressure head, the clamping block is connected to the rotating frame, and the two steel sheets are both mounted on the rotating frame.

[0012] Preferably, an annular bevel groove is provided on the sliding tube, the clamping block is slidably connected to the annular bevel groove, and the two steel sheets are in contact with the outer surface of the end of the pressure head away from the cylinder.

[0013] Preferably, the pigment replenishing assembly includes a buffer cylinder, a second spring, a liquid tank and a liquid tube, the buffer cylinder is connected to the inner wall of the hollow column, the end of the sliding tube away from the pressure head is located inside the buffer cylinder, the sliding tube is slidingly 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 pressure head, the liquid tank is installed in the hollow column, and the liquid tube is connected between the liquid tank and the buffer cylinder.

[0014] Preferably, the pigment replenishing component further comprises a liquid injection port, which is connected to the liquid tank and passes through the hollow column. Check valves are respectively provided in the flow channels of the liquid pipe and the slide pipe.

[0015] Preferably, the paint replenishing assembly also includes a turntable, six spherical hinges, three connecting rods and multiple blades. The turntable is rotatably connected to the inside of the buffer cylinder, three of which 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 end of the three connecting rods is movably connected to the three spherical hinges on the turntable, and the other end of the three connecting rods is movably connected to the three spherical hinges on the sliding tube. The three connecting rods are all inclined, and the multiple blades are installed on the turntable.

[0016] The beneficial effects are:

[0017] 1. The detection device for detecting the welding quality of drawn arc welding studs, through the combination of a pressure component, a displacement sensor, a cylinder and a pressure sensor, enables the workpiece to pass through the mounting frame on the automated production line, and performs welding quality detection through the pressure of the pressure head. The displacement sensor is used to detect whether the workpiece is qualified, and the quality inspection work steps are integrated into the automated production line, which optimizes the continuity of workpiece production, improves production efficiency, and reduces the manpower cost of manual inspection.

[0018] 2. The device for detecting the welding quality of drawn arc welding studs is equipped with a marking component. When the workpiece quality is unqualified, the slide tube can drive the printing head to print a mark on the workpiece surface, so that subsequent staff can identify and sort unqualified workpieces. The rotating frame and two steel plates are set up, so that the two steel plates can be rotated before and after the welding quality test to remove impurities on the surface of the pressure head, avoiding the pressure head from being attached to a thick layer of impurities after long-term use, which affects the detection accuracy.

[0019] 3. The detection device for detecting the welding quality of drawn arc welding studs is equipped with a pigment replenishing component so that after each marking by the slide tube and the print head, the buffer cylinder can replenish the pigment into the print head through the flow channel of the slide tube, thereby maintaining the saturation of the pigment in the print head and ensuring the marking effect of the print head; and the arrangement of multiple blades enables the multiple blades to stir the pigment in the buffer cylinder by rotating each time the print head marks, thereby making the pigment texture more uniform and avoiding the precipitation and stratification of the pigment, which affects the marking quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic structural diagram of the mounting base of the present invention;

[0023] Figure 3 It is a schematic structural diagram of the pressure component of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the marking assembly of the present invention;

[0025] Figure 5 It is a schematic diagram of the pressure head structure of the present invention;

[0026] Figure 6 It is a schematic structural diagram of the turret of the present invention;

[0027] Figure 7 It is a schematic diagram of the sawtooth bar structure of the present invention;

[0028] Figure 8 It is a schematic diagram of the ratchet block structure of the present invention;

[0029] Figure 9 is a schematic structural diagram of the pigment replenishing assembly of the present invention;

[0030] Figure 10 It is a schematic diagram of the liquid tank structure of the present invention;

[0031] Figure 11 It is a schematic diagram of the turntable structure of the present invention.

[0032] The accompanying drawings are marked as follows: 1. Mounting frame; 2. Mounting seat; 3. Displacement sensor; 4. Cylinder; 41. Output end; 5. Pressure sensor; 6. Hollow column; 7. Pressure assembly; 71. Pressure head; 72. Slider; 73. Fixing ring; 74. First spring; 75. Touch button; 8. Marking assembly; 81. Slide tube; 82. Print head; 83. Mounting shaft; 84. Rotating rod; 85. First slide shaft; 86. Slide rod; 87. Second slide shaft; 88. Ratchet block; 89. Sawtooth bar; 810. Inclined rod; 811. Annular inclined groove; 812. Rotating frame; 813. Block; 814. Steel sheet; 9. Paint replenishing assembly; 91. Buffer cylinder; 92. Second spring; 93. Liquid tank; 94. Liquid filling port; 95. Liquid pipe; 96. Turntable; 97. Ball hinge; 98. Connecting rod; 99. Blade. DETAILED DESCRIPTION

[0033] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other implementations obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

[0034] Example 1

[0035] See also Figures 1-11, a detection device for detecting the welding quality of drawn arc welding studs, including a mounting frame 1, the mounting frame 1 can be installed on an automated production line, after the workpiece is welded, it passes the position of the mounting frame 1, the mounting frame 1 is installed with a mounting seat 2, the mounting seat 2 is installed with a displacement sensor 3, a pressure sensor 5 and a cylinder 4, the displacement sensor 3 is a prior art, and its structure and working principle are not described in detail, the cylinder 4 is provided with an output end 41, the output end 41 of the cylinder 4 is connected to a hollow column 6; it also includes a pressure component 7 for applying pressure to the workpiece to detect the welding quality; the pressure component 7 includes a pressure head 71, the pressure head 71 The inner wall of the hollow column 6 is connected to the inner wall of the hollow column 6 with a fixed ring 73. The end of the pressure head 71 close to the fixed ring 73 is connected to a slider 72. A first spring 74 is provided 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, which is provided on the pressure head 71. The pressure sensor 5 is a prior art. Its structure and working principle will not be described in detail. During detection, the air in the mounting seat 2 The cylinder 4 is started, and the output end 41 drives the hollow column 6 to approach the workpiece. When the pressure head 71 is against the workpiece, the pressure head 71 is subjected to the reverse thrust of the workpiece and shrinks into the hollow column 6. During the movement of the slider 72, it contacts the touch button 75 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 pressure 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 hollow column 6. The moving distance, when the distance of the hollow column 6 exceeds the set value, it means that the curvature of the workpiece exceeds the set value, from which it can be concluded that the welding quality of the workpiece is unqualified; through the cooperation of the pressure 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 is detected by the pressure of the pressure head 71, and the detection of the displacement sensor 3 is used to determine whether the workpiece is qualified, and the work steps of quality inspection are integrated into the automated production line, which optimizes the continuity of workpiece production, improves production efficiency, and reduces the manpower cost investment of manual inspection.

[0036] Furthermore, the marking assembly 8 is used to mark workpieces with unqualified welding quality; the marking assembly 8 includes a slide tube 81, a print head 82, a mounting shaft 83, a rotating rod 84, a first slide shaft 85, a slide rod 86, a second slide shaft 87, a ratchet block 88, a sawtooth bar 89 and a bevel rod 810, the slide tube 81 is slidably connected to the inner wall of the pressure head 71, the print head 82 is connected to one end of the slide tube 81 located inside the pressure head 71, a flow channel is provided inside the slide tube 81, the print head 82 is connected to the flow channel of the slide tube 81, the mounting shaft 83 is connected to the inner wall of the hollow column 6, and the rotating rod 84 is rotatably mounted on the mounting shaft 8 3, 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 bar 89 is connected to the outer wall of the cylinder 4, the inclined rod 810 is connected to the side of the slider 72 close to the fixed ring 73, a sliding groove is provided on the rotating rod 84, the first sliding shaft 85 is slidably connected to the sliding groove of the rotating rod 84, the inclined rod 810 passes through the fixed ring 73, and the end of the inclined rod 810 away from the slider 72 is provided with an inclined surface, and the inclined surface of the inclined rod 810 is in contact with the second sliding shaft 87 sliding contact, an opening is provided on the hollow column 6, the rotating rod 84 passes through the opening of the hollow column 6, the ratchet block 88 engages with the sawtooth bar 89 during movement, and when the inclined rod 810 moves to the right, it drives the second sliding shaft 87 downward through its inclined surface, and the second sliding shaft 87 drives the sliding rod 86 downward, and the sliding rod 86 drives the ratchet block 88 downward. After the ratchet block 88 moves downward, it contacts and engages with the sawtooth bar 89. When the sliding rod 86 moves to the left, the ratchet block 88 engages with the sawtooth bar 89, so that the ratchet block 88 cannot move to the left temporarily, thereby causing the sliding rod 86 and the rotating rod 84 to rotate counterclockwise around the mounting shaft 83. The rod 84 uses the lever principle to drive the slide tube 81 to slide leftward in the pressure head 71 through the cooperation of the first slide shaft 85 and the slide groove. When the pressure head 71 moves left beyond the set value, that is, the quality of the workpiece is unqualified, the printing head 82 on the slide tube 81 contacts the workpiece. The printing head 82 has pigment adsorbed in it. The contact between the printing head 82 and the workpiece can print a mark on the surface of the workpiece, thereby achieving the effect of marking the unqualified workpiece. Through the setting of the marking component 8, when the quality of the workpiece is unqualified, the slide tube 81 can drive the printing head 82 to print a mark on the surface of the workpiece, so as to facilitate subsequent staff to identify and sort the unqualified workpieces.

[0037] Furthermore, the marking assembly 8 also includes a rotating frame 812, a block 813 and two steel sheets 814. The rotating frame 812 is rotatably connected to the inner wall of the pressure head 71. The rotating frame 812 has a certain elasticity. The block 813 is connected to the rotating frame 812. The two steel sheets 814 are both installed on the rotating frame 812. The thickness of the steel sheet 814 is relatively low and the hardness is relatively high. An annular bevel 811 is provided on the slide tube 81. The block 813 is slidably connected to the annular bevel 811. The two steel sheets 814 are in contact with the outer surface of the end of the pressure head 71 away from the 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 subjected to the reverse thrust 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. Through the arrangement of the rotating frame 812 and the two steel sheets 814, the two steel sheets 814 can be rotated before and after the welding quality inspection to remove impurities on the surface of the pressure head 71, thereby avoiding the pressure head 71 from being attached to a thick layer of impurities after long-term use, thereby affecting the inspection accuracy.

[0038] In addition, the 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, the end of the slide tube 81 away from the pressure head 71 is located inside the buffer cylinder 91, the slide 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 slide tube 81 away from the pressure head 71, the liquid tank 93 is installed in 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 also includes a liquid injection port 94, the liquid injection port 94 is connected to the liquid tank 93, the liquid injection port 94 passes through the hollow column 6, and the pigment is injected into the liquid tank 93 through the liquid injection port 94. Check valves are respectively provided in the flow channels of the liquid pipe 95 and the slide tube 81, and the check valves in the flow channels of the liquid pipe 95 and the slide tube 81 can avoid The pigment refluxes, making the pigment flow in only one direction. The slide tube 81 and the print head 82 move to the left, causing a section of the slide tube 81 located inside the buffer cylinder 91 to extend outward. At this time, the hydraulic pressure in the buffer cylinder 91 is reduced, and the buffer cylinder 91 sucks the pigment in the liquid tank 93 into the buffer cylinder 91 through the liquid pipe 95. After the slide tube 81 is reset to the right by the second spring 92, the hydraulic pressure in the buffer cylinder 91 increases, causing the pigment in the buffer cylinder 91 to enter the flow channel of the slide tube 81, thereby replenishing it into the print head 82. This achieves the effect that the pigment in the buffer cylinder 91 can be automatically replenished into the print head 82 every time the print head 82 makes a mark. Through the setting of the pigment replenishing component 9, the buffer cylinder 91 can replenish the pigment into the print head 82 through the flow channel of the slide tube 81 every time the slide tube 81 and the print head 82 make a mark, thereby maintaining the saturation of the pigment in the print head 82 and ensuring the marking effect of the print head 82.

[0039] In addition, the paint replenishing component 9 also includes a turntable 96, six ball hinges 97, three connecting rods 98 and a plurality of blades 99. The turntable 96 is rotatably connected to the inside of the buffer cylinder 91, wherein three ball hinges 97 are connected to the turntable 96, and the other three ball hinges 97 are connected to one end of the slide tube 81 located inside the buffer cylinder 91. One end of the three connecting rods 98 is movably connected to the three ball hinges 97 on the turntable 96, and the other end of the three connecting rods 98 is movably connected to the three ball hinges 97 on the slide tube 81. The three connecting rods 98 are all inclined and inclined in a spiral shape. The plurality of blades 99 are all installed on the turntable 96. When the slide tube 81 moves to the left, it drives the three ball hinges 97 above it to move to the left, so that the slide tube 81 moves to the left. The three spherical hinges 97 on 1 pull the left ends of the three connecting rods 98 to the left, so that the inclined connecting rods 98 gradually become 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 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 precipitate and stratify after being stationary for a period of time, the stirring of the multiple blades 99 can make the pigment texture more uniform. Through the arrangement of the multiple blades 99, each time the print head 82 makes a mark, the multiple blades 99 can stir the pigment in the buffer cylinder 91 by rotating, making the pigment texture more uniform and avoiding the pigment from precipitating and stratifying, thereby affecting the marking quality.

[0040] With the above structure, the following reference Figure 1The working principle of this case is that the mounting frame 1 can be installed on an automated production line. After the workpiece is welded, it passes through the position of the mounting frame 1 for welding quality inspection. During the inspection, the cylinder 4 in the mounting seat 2 is started, and the output end 41 drives the hollow column 6 close to the workpiece. When the pressure head 71 is against the workpiece, the pressure head 71 is subjected to the reverse thrust of the workpiece and shrinks into the hollow column 6. The slider 72 on the pressure head 71 is close to the fixing ring 73. During the movement of the slider 72, it contacts and presses the touch button 75. Then The slider 72 is against the fixed ring 73, and the touch button 75 is triggered to start the displacement sensor 3. The displacement sensor 3 is a prior art, and its structure and working principle are not described in detail. The displacement sensor 3 can detect the relative movement distance between the hollow column 6 and the mounting seat 2. Since the workpiece is against the pressure head 71 at this time, the pressure head 71 and the hollow column 6 cannot continue to move temporarily. At this time, the cylinder 4 continues to output. The pressure sensor 5 is a prior art, and its structure and working principle are not described in detail. The pressure sensor 5 can detect the pressure applied to the workpiece by the pressure head 71. Pressure. When the pressure reaches the set value, the detection ends. During this process, the workpiece may bend due to pressure, and when the workpiece bends, the hollow column 6 and the pressure head 71 will move a certain distance. The displacement sensor 3 can detect the distance moved by the hollow column 6. When the distance of the hollow column 6 exceeds the set value, it means that the curvature of the workpiece bending exceeds the set value. It can be concluded that the welding quality of the 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 is completed, the cylinder 4 contracts, the pressure head 71 leaves the workpiece, and the pressure head 71 is reset by the elastic force of the first spring 74; through the cooperation of the pressure 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 is detected by the pressure of the pressure head 71. The workpiece is judged to be qualified by the detection of the displacement sensor 3, and the quality detection work steps are integrated into the automated production line, which optimizes the continuity of workpiece production, improves production efficiency, and reduces the manpower cost investment of manual detection.

[0041] When the pressure head 71 shrinks into the hollow column 6, the slide tube 81 remains stationary temporarily, and the slider 72 drives the inclined rod 810 to move right. When the inclined rod 810 moves right, it drives the second slide shaft 87 to move down through its inclined surface. The second slide shaft 87 drives the slide rod 86 to move down, and the slide rod 86 drives the ratchet block 88 to move down. After the ratchet block 88 moves down, it contacts the sawtooth bar 89. At this time, the slider 72 contacts the fixed ring 73, and the welding quality inspection begins. Since the slide tube 81 is limited, It will not move right, but the slide 81 can move left. For example, when the workpiece is on the left side of the pressure head 71, when the workpiece bends, the hollow column 6 and the pressure head 71 move left. Since the sawtooth bar 89 is connected to the outer wall of the cylinder 4, and the outer wall of the cylinder 4 does not move, the hollow column 6 and the sawtooth bar 89 form a relative movement. When the hollow column 6 moves, the rotating rod 84 moves left through the mounting shaft 83, and the rotating rod 84 drives the slide bar 86 to move left. When the slide bar 86 moves left, the ratchet block 88 engages. The cam 86 is then moved back to the left by the spring 82 and the spring 83 is released, and the cam 86 is then moved back to the right by the spring 83.When the pressure head 71 moves, a relative motion relationship is formed between the pressure head 71 and the slide tube 81. When the pressure head 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 reverse thrust 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 plates 814 to rotate. Therefore, during the period from when the pressure head 71 just contacts the workpiece to when the displacement sensor 3 is started, the rotating frame 812 can drive the two steel plates 814 to rotate no more than one hundred and eighty degrees. When the two steel plates 814 rotate, the contact surface between the workpiece and the pressure head 71 is cleaned in a contact manner to remove impurities on the surface of the workpiece, so as to avoid impurities adhering to the surface of the pressure head 71 and affecting the detection accuracy. After the detection is completed, when the pressure head 71 is reset, the two steel plates 814 rotate again. The pressure head 71 is cleaned to maintain the cleanliness of the surface of the pressure head 71. The steel sheet 814 is of low thickness and high hardness. During the inspection, it is clamped between the workpiece and the pressure head 71. The rotating frame 812 has a certain elasticity. When the workpiece and the pressure head 71 clamp the steel sheet 814, the rotating frame 812 can still rotate. During this process, the rotating frame 812 deforms. After the inspection is completed, the rotating frame 812 returns to its original position due to its own elasticity. Through the setting of the marking component 8, when the workpiece quality is unqualified, the slide tube 81 can drive the printing head 82 to print a mark on the workpiece surface, so that subsequent staff can identify and sort unqualified workpieces. Through the setting of the rotating frame 812 and the two steel sheets 814, the two steel sheets 814 can be rotated before and after the welding quality inspection to remove impurities on the surface of the pressure head 71, thereby preventing the pressure head 71 from being attached to a thick layer of impurities after long-term use, which affects the inspection accuracy.

[0042] The pigment is injected into the liquid tank 93 through the liquid injection port 94, and 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 slide tube 81. The print head 82 absorbs the pigment and keeps the print head 82 able to work normally. When the print head 82 marks, the slide tube 81 and the print head 82 move to the left, so that the section of the slide tube 81 located inside the buffer cylinder 91 extends outward. At this time, the hydraulic pressure in the buffer cylinder 91 is reduced, and the buffer cylinder 91 sucks the pigment in the liquid tank 93 into the buffer cylinder 91 through the liquid pipe 95. A vent valve is provided on the liquid tank 93 to keep the liquid tank 93 3 is kept at normal pressure, and the check valves in the flow passages of the liquid pipe 95 and the slide pipe 81 can prevent the backflow of the pigment, so that the pigment can only flow in one direction. After the slide pipe 81 is reset to the right by the second spring 92, the hydraulic pressure in the buffer cylinder 91 increases, so that the pigment in the buffer cylinder 91 enters the flow passage of the slide pipe 81 and is replenished into the print head 82, so that the pigment in the buffer cylinder 91 can be automatically replenished into the print head 82 after each marking by the print head 82. When the slide pipe 81 moves to the left, it drives the three ball hinges 97 above it to move to the left, so that the three ball hinges 97 on the slide pipe 81 rotate the three connecting rods 9 8 is pulled to the left, so that the inclined connecting rods 98 are gradually parallel, and the three connecting rods 98 are inclined in a vortex shape. Therefore, in the process of the three connecting rods 98 becoming parallel, the three connecting rods 98 drive the turntable 96 to rotate through the three ball hinges 97 on the turntable 96. Similarly, when the slide tube 81 is moved right and reset, the three connecting rods 98 drive the turntable 96 to rotate and reset. When the turntable 96 rotates, it drives the 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 precipitate and stratify after being stationary for a period of time, the stirring of the multiple blades 99 can make the pigment quality uniform. The pigment replenishing component 9 is set so that each time the slide tube 81 and the print head 82 make a mark, the buffer cylinder 91 can replenish the pigment into the print head 82 through the flow channel of the slide tube 81, thereby maintaining the saturation of the pigment in the print head 82 and ensuring the marking effect of the print head 82; the plurality of blades 99 are set so that each time the print head 82 makes a mark, the plurality of blades 99 can stir the pigment in the buffer cylinder 91 by rotating, thereby making the pigment texture more uniform and avoiding the precipitation and stratification of the pigment, thereby affecting the marking quality.

[0043] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A device for detecting the welding quality of drawn arc welding studs, comprising a mounting frame (1), characterized in that: A mounting base (2) is mounted on the mounting frame (1), a displacement sensor (3), a pressure sensor (5) and a cylinder (4) are mounted on the mounting 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 also includes a pressure component (7) for applying pressure to the workpiece to perform welding quality inspection; A marking component (8) is used to mark workpieces with unqualified welding quality; A pigment replenishing component (9) for automatically replenishing the pigment required by the marking component (8); The pressure-applying assembly (7) includes a pressure head (71), the pressure head (71) penetrates and is slidably connected to the inner wall of the hollow column (6), the inner wall of the hollow column (6) is fixedly connected to a fixing ring (73), the pressure head (71) is connected to a slider (72) at one end close to the fixing ring (73), a first spring (74) is provided between the slider (72) and the hollow column (6), a touch button (75) is installed on the fixing ring (73), and the slider (72) contacts the touch button (75) and the fixing ring (73) when moving; The marking assembly (8) comprises a slide tube (81), a printing head (82), a mounting shaft (83), a rotating rod (84), a first slide shaft (85), a slide rod (86), a second slide shaft (87), a ratchet block (88), a sawtooth bar (89) and a bevel rod (810), wherein the slide tube (81) is slidably connected to the inner wall of the pressure head (71), the printing head (82) is connected to one end of the slide tube (81) located inside the pressure head (71), a flow channel is provided inside the slide tube (81), the printing head (82) is connected to the flow channel of the slide tube (81), and 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 bar (89) is connected to the outer wall of the cylinder (4), and the inclined rod (810) is connected to the side of the slider (72) close to the fixed ring (73); The rotating rod (84) is provided with a sliding groove, the first sliding shaft (85) is slidably connected to the sliding groove of the rotating rod (84), the inclined rod (810) passes through the fixing ring (73), the inclined rod (810) is provided with an inclined surface at one end away from the slider (72), the inclined surface of the inclined rod (810) is in sliding contact with the second sliding shaft (87), the hollow column (6) is provided with an opening, the rotating rod (84) passes through the opening of the hollow column (6), and the ratchet block (88) engages with the sawtooth bar (89) when moving.

2. The device for detecting the welding quality of drawn arc welding studs according to claim 1, characterized in that: The touch button (75) is connected to the displacement sensor (3) via a wire, and the pressure sensor (5) is provided with a pressure-bearing element, which is provided on the pressure head (71).

3. The device for detecting the welding quality of drawn arc welding studs according to claim 1, characterized in that: The marking assembly (8) further comprises 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 pressure head (71); the clamping block (813) is connected to the rotating frame (812); and the two steel sheets (814) are both mounted on the rotating frame (812).

4. The device for detecting the welding quality of drawn arc welding studs according to claim 3, characterized in that: An annular bevel groove (811) is provided on the slide tube (81), the clamping block (813) is slidably connected to the annular bevel groove (811), and the two steel sheets (814) are in contact with the outer surface of one end of the pressure head (71) away from the cylinder (4).

5. The device for detecting the welding quality of drawn arc welding studs according to claim 1, characterized in that: The pigment replenishing component (9) includes a buffer cylinder (91), a second spring (92), a liquid tank (93) and a liquid pipe (95), wherein the buffer cylinder (91) is connected to the inner wall of the hollow column (6), the end of the slide tube (81) away from the pressure head (71) is located inside the buffer cylinder (91), the slide 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 slide tube (81) away from the pressure head (71), the liquid tank (93) is installed in the hollow column (6), and the liquid pipe (95) is connected between the liquid tank (93) and the buffer cylinder (91).

6. The device for detecting the welding quality of drawn arc welding studs according to claim 5, characterized in that: The pigment replenishing assembly (9) further comprises a liquid injection port (94), the liquid injection port (94) being connected to the liquid tank (93) and penetrating the hollow column (6), and check valves being respectively provided in the flow passages of the liquid pipe (95) and the slide pipe (81).

7. The device for detecting the welding quality of drawn arc welding studs according to claim 6, characterized in that: The paint replenishing component (9) also includes a turntable (96), six spherical hinges (97), three connecting rods (98) and a plurality of blades (99). The turntable (96) is rotatably connected to the inside of the buffer cylinder (91), wherein three spherical hinges (97) are connected to the turntable (96), and the other three spherical hinges (97) are connected to one end of the slide tube (81) located inside the buffer cylinder (91). One end of the three connecting rods (98) is movably connected to the three spherical hinges (97) on the turntable (96), and the other end of the three connecting rods (98) is movably connected to the three spherical hinges (97) on the slide tube (81). The three connecting rods (98) are all inclined, and the plurality of blades (99) are all installed on the turntable (96).

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