Diode quality detection equipment

Abstract

The invention discloses diode quality detection equipment, and belongs to the field of diode intelligent test instruments. The equipment comprises a workbench, a turntable is rotatably connected to the workbench, a polarity correction mechanism is arranged on the turntable, the polarity correction mechanism comprises a placement table, a cylinder is rotatably connected to the placement table, a rectangular hole is formed in the middle of the cylinder, a body is inserted into the rectangular hole, and a rectangular piston cylinder is slidably connected to the end, facing the circle center of the turntable, of the placement table; a rectangular piston rod is slidably connected into the rectangular piston cylinder, a round piston cylinder communicating with the rectangular piston cylinder is fixedly connected to the placement table, a round piston rod is slidably connected into the round piston cylinder, the output end of the round piston rod is slidably connected with a bevel gear ring, and the bevel gear ring is slidably connected to the cylinder through a key; the workbench is connected with a detection table, and the bottom of the detection table is connected with an arc-shaped rack. The device senses whether the polarity is reversed by detecting the shape of the diode, and corrects the polarity by overturning the cylinder, so that the subsequent electrical property detection result is accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of diode intelligent testing instruments, and specifically relates to a diode quality detection device. Background Art

[0002] During the production and manufacturing process of diodes, the detection of their electrical performance and polarity correction are crucial. As a semiconductor device with unidirectional conductivity, diodes are widely used in circuits such as rectification, limiting, and switching. The correctness of its polarity directly affects the function and stability of the circuit. Therefore, 100% polarity detection and correction of diodes are required before leaving the factory.

[0003] In recent years, with the development of industrial automation technology, rotary detection equipment has gradually been applied to the batch detection of electronic components. Currently, for the feeding of the rotary detection table, a vibrating bowl and a track transmission are generally used. Although the vibrating bowl can ensure that the orientations of the pins are consistent, it may also cause the diodes to flip, resulting in the inversion of the pin polarities, thus making the results of subsequent electrical detection inaccurate. To address this problem, some devices use a combination of complex sensor arrays and robotic arms to achieve polarity identification and flipping, but the system structure is large, the cost is high, and maintenance is difficult. Summary of the Invention

[0004] The purpose of the present invention is to provide a diode quality detection device, which solves the problem that the existing detection device is relatively complex in identifying the polarity of diodes.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A diode quality detection device, the diode includes a body, one end of the upper surface of the body has a notch, and the other end has pins. The detection device includes a machine body, the machine body includes a workbench, a turntable is rotatably connected to the workbench, a polarity correction mechanism is arranged on the turntable, the polarity correction mechanism includes a placement table, a cylinder is rotatably connected to the placement table, a rectangular hole is opened in the middle of the cylinder, the body is inserted into the rectangular hole, one end of the placement table facing the center of the turntable is slidably connected with a rectangular piston cylinder, a rectangular piston rod is slidably connected in the rectangular piston cylinder, a circular piston cylinder communicated with the rectangular piston cylinder is fixedly connected to the placement table, a circular piston rod is slidably connected in the circular piston cylinder, a tapered gear ring is slidably connected to the output end of the circular piston rod, and the tapered gear ring is key-slidably connected to the cylinder; A detection table is connected to the workbench, an arc-shaped rack is connected to the bottom of the detection table. When the polarity of the body is reversed, the rectangular piston cylinder slides towards the body and the rectangular piston rod abuts against the body, which can cause the circular piston rod to extend and push the tapered gear ring to slide on the cylinder. Thus, when the turntable rotates, the tapered gear ring can roll on the arc-shaped rack, so that the body is flipped 180 degrees.

[0006] Preferably, the polarity correction mechanism further includes a sliding seat radially sliding on the turntable, the rectangular piston cylinder is fixedly connected to the top of the sliding seat, a convex block is fixedly connected to the side of the sliding seat, a spring is connected between the sliding seat and the placing table, an arc-shaped baffle and a wedge block are fixedly connected to the lower surface of the detection table. When the convex block contacts the wedge block, one end of the body close to the pin contacts the inner surface of the arc-shaped baffle, so that the body cannot slide relative to the cylinder.

[0007] Preferably, a first electric push rod is fixedly connected to the workbench. After the turntable drives the placing table to move past the arc-shaped rack, the cylinder is aligned with the first electric push rod, so that when the first electric push rod extends, it can push the bevel gear ring to reset.

[0008] Preferably, there are two circular piston rods, the two circular piston rods are symmetrically arranged on the placing table, sliders are fixedly connected to the ends of the two circular piston rods, and annular chutes are formed on the bevel gear ring to cooperate with the two sliders.

[0009] Preferably, two spherical protrusions are symmetrically arranged on one end face of the cylinder, and spherical grooves are formed on the placing table to cooperate with the two spherical protrusions.

[0010] Preferably, a shape detection mechanism is further included. The shape detection mechanism is used to detect whether the pins are bent and includes a swing rod. A detection rake is fixedly connected to the end of the swing rod. When the turntable drives the placing table to face the shape detection mechanism, the swing rod swings towards the pins of the body on the placing table to a horizontal state, and then the swing rod slides in a direction away from the placing table. When the pins are deformed, the detection rake can contact the pins when sliding and pull the body out of the placing table, and when the pins are not deformed, the detection rake does not contact the pins when sliding.

[0011] Preferably, a rotating seat is fixedly connected to the workbench, a rotating rod is rotatably connected to the rotating seat, a first torsion spring is connected between the rotating rod and the rotating seat, the swing rod is inserted through the middle of the rotating rod, and the swing rod can swing when the rotating rod rotates.

[0012] Preferably, a connecting seat is fixedly connected to the side wall of the rotating rod, a first receiving rod is rotatably connected to the connecting seat, a second receiving rod is coaxially fixedly connected to the first receiving rod, and a second torsion spring is connected between the first receiving rod and the connecting seat. The torsion of the second torsion spring is greater than that of the first torsion spring; One end of the swing rod far from the detection rake is connected to the rotating rod by an elastic cord. A first pulling cord is wound and connected to the first storage rod, and the end of the first pulling cord is connected to one end of the swing rod close to the detection rake. A small motor is fixedly connected to the workbench. The output end of the small motor is fixedly connected to a third storage rod, and a second pulling cord is connected between the third storage rod and the second storage rod.

[0013] Preferably, a blanking hole is formed on the workbench between the rotating base and the turntable.

[0014] Preferably, it further includes a feeding mechanism. The feeding mechanism includes a housing connected to the workbench. A transmission track penetrates through the housing. The transmission track is connected to an external vibrating disk. The end of the transmission track is connected to a second electric push rod. When the second electric push rod extends, it can push the diode on the transmission track into the cylinder on the placement table.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: In the subsequent rotation process of the turntable of the present invention, the rectangular piston cylinder slides towards the direction of the cylinder. If the polarity of the diode is not reversed, the notch is in an upward state. At this time, the rectangular piston cylinder drives the rectangular piston rod to move towards the diode. At this time, the end of the rectangular piston rod moves to the position of the notch and does not contact the body, so the subsequent flipping action will not be triggered. If the polarity of the diode is reversed, the notch is downward. At this time, when the rectangular piston cylinder moves and drives the rectangular piston rod to move, the rectangular piston rod abuts against the body. At this time, when the rectangular piston cylinder continues to move, the rectangular piston rod slides into the interior of the rectangular piston cylinder. The air in the rectangular piston cylinder is transmitted to the circular piston cylinder through the air pipe. Thus, the circular piston rod extends, and it can push the bevel gear ring to slide on the cylinder. At this time, the distance between the bevel gear ring and the center of the turntable is shortened. Subsequently, the turntable drives the placement table to continue to move. At this time, the bevel gear ring can mesh with the arc-shaped rack. Thus, after the bevel gear ring rolls over the arc-shaped rack, the bevel gear ring drives the cylinder to flip 180 degrees, so that the polarity of the diode is corrected. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure at the feeding mechanism of the present invention; Figure 3 It is a schematic diagram of the structure at the rectangular piston cylinder of the present invention; Figure 4 It is a schematic diagram of the structure at the placement table of the present invention; Figure 5 It is a schematic diagram of the structure at the arc-shaped rack of the present invention; Figure 6The bottom view of the detection table of the present invention; Figure 7 The structural schematic diagram of the slider of the present invention; Figure 8 The structural schematic diagram of the diode of the present invention; Figure 9 The structural schematic diagram of the shape detection mechanism of the present invention; Figure 10 For the present invention Figure 9 The structural schematic diagram of part A in.

[0017] In the figure: 100, polarity correction mechanism; 110, placement table; 120, cylinder; 121, spherical protrusion; 130, bevel gear ring; 131, first electric push rod; 140, sliding seat; 141, convex block; 142, rectangular piston cylinder; 143, rectangular piston rod; 150, circular piston cylinder; 151, air pipe; 152, circular piston rod; 153, slider; 160, spring; 170, arc-shaped baffle; 180, wedge block; 190, arc-shaped rack; 200, shape detection mechanism; 210, blanking hole; 220, rotating seat; 230, rotating rod; 231, first torsion spring; 240, swing rod; 241, detection rake; 242, elastic cord; 250, connecting seat; 260, first receiving rod; 261, first pulling rope; 262, second torsion spring; 270, second receiving rod; 271, second pulling rope; 280, small motor; 281, third receiving rod; 300, feeding mechanism; 310, housing; 320, transmission track; 330, second electric push rod; 400, machine body; 410, workbench; 420, detection table; 430, turntable; 440, first blanking track; 450, second blanking track; 500, body; 510, notch; 520, pin. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Refer to Figures 1 - 10, this embodiment provides a technical solution: a diode quality detection device. The diode includes a body 500. One end of the upper surface of the body 500 has a notch 510, and the other end has a pin 520. The detection device includes a body 400, and the body 400 includes a workbench 410. A turntable 430 is rotatably connected to the workbench 410. A polarity correction mechanism 100 is arranged on the turntable 430. The polarity correction mechanism 100 includes a placement table 110. A cylinder 120 is rotatably connected to the placement table 110. A rectangular hole is opened in the middle of the cylinder 120. The body 500 is inserted into the rectangular hole. One end of the placement table 110 facing the center of the turntable 430 is slidably connected with a rectangular piston cylinder 142. A rectangular piston rod 143 is slidably connected in the rectangular piston cylinder 142. A circular piston cylinder 150 communicated with the rectangular piston cylinder 142 is fixedly connected to the placement table 110. A circular piston rod 152 is slidably connected in the circular piston cylinder 150. The output end of the circular piston rod 152 is slidably connected with a bevel gear ring 130. The bevel gear ring 130 is key-slidably connected to the cylinder 120; A detection table 420 is connected to the workbench 410. An arc-shaped rack 190 is connected to the bottom of the detection table 420. When the polarity of the body 500 is reversed, the rectangular piston cylinder 142 slides towards the body 500 and the rectangular piston rod 143 abuts against the body 500, which can make the circular piston rod 152 extend and push the bevel gear ring 130 to slide in the cylinder 120. Thus, when the turntable 430 rotates, the bevel gear ring 130 can roll on the arc-shaped rack 190, so that the body 500 is flipped 180 degrees.

[0020] The turntable 430 is driven by a servo motor and is set according to the number of placement tables 110 on the turntable 430. The servo motor drives the turntable 430 to rotate and pauses after rotating by the angle of the included angle between the center line of two adjacent placement tables 110 and the turntable 430, so as to facilitate the detection of the diodes on the placement tables 110; After the turntable 430 stops rotating, place the diode on the placement table 110 so that the body 500 of the diode is inserted into the cylinder 120. The turntable 430 continues to rotate. During the subsequent rotation of the turntable 430, the rectangular piston cylinder 142 slides towards the cylinder 120, as Figure 3 and Figure 8As shown, if the polarity of the diode is not reversed, the notch 510 is in an upward state. At this time, the rectangular piston cylinder 142 drives the rectangular piston rod 143 to move towards the diode. At this time, the end of the rectangular piston rod 143 moves to the position of the notch 510 without contacting the body 500, so that the subsequent flipping action will not be triggered. If the polarity of the diode is reversed, the notch 510 faces downward. At this time, when the rectangular piston cylinder 142 moves and drives the rectangular piston rod 143 to move, the rectangular piston rod 143 abuts against the body 500. At this time, when the rectangular piston cylinder 142 continues to move, the rectangular piston rod 143 slides into the rectangular piston cylinder 142. The air in the rectangular piston cylinder 142 is transmitted to the circular piston cylinder 150 through the air pipe 151. Thus, the circular piston rod 152 elongates and can push the bevel gear ring 130 to slide on the cylinder 120. At this time, the distance between the bevel gear ring 130 and the center of the turntable 430 is shortened. Subsequently, the turntable 430 drives the placement table 110 to continue to move. At this time, the bevel gear ring 130 can mesh with the arc-shaped rack 190. Thus, after the bevel gear ring 130 rolls over the arc-shaped rack 190, the bevel gear ring 130 drives the cylinder 120 to flip 180 degrees, so that the polarity of the diode is corrected, ensuring the accuracy of the subsequent electrical detection of the diode; When the bevel gear ring 130 does not slide towards the turntable 430, when the turntable 430 drives the bevel gear ring 130 to move to the position of the arc-shaped rack 190, there is a gap between the bevel gear ring 130 and the arc-shaped rack 190 and they will not mesh. Thus, the cylinder 120 will not flip at this time.

[0021] The polarity correction mechanism 100 further includes a sliding seat 140 that slides radially on the turntable 430. The rectangular piston cylinder 142 is fixedly connected to the top of the sliding seat 140. A convex block 141 is fixedly connected to the side of the sliding seat 140. A spring 160 is connected between the sliding seat 140 and the placement table 110. An arc-shaped baffle 170 and a wedge 180 are fixedly connected to the lower surface of the detection table 420. When the convex block 141 contacts the wedge 180, one end of the body 500 close to the pin 520 contacts the inner surface of the arc-shaped baffle 170. Thus, the body 500 cannot slide relative to the cylinder 120.

[0022] When the turntable 430 drives the placement table 110 to revolve, the inner surface of the arc-shaped baffle 170 abuts against one end of the body 500 facing the pin 520. At this time, the arc-shaped baffle 170 blocks the diode, so that the diode will not slide out of the cylinder 120. At the same time, when the turntable 430 rotates, the convex block 141 can contact the wedge 180. Thus, when the convex block 141 slides along the inclined surface of the wedge 180, it can push the sliding seat 140 to drive the rectangular piston cylinder 142 to move towards the cylinder 120. Thus, if the rectangular piston rod 143 abuts against the body 500, the body 500 will not be pushed out of the cylinder 120.

[0023] A first electric push rod 131 is fixedly connected to the workbench 410. After the turntable 430 drives the placement table 110 to move past the arc-shaped rack 190, the cylinder 120 is aligned with the first electric push rod 131. Thus, when the first electric push rod 131 extends, it can push the bevel gear ring 130 back to its original position.

[0024] The turntable 430 continues to rotate so that after the placement table 110 moves past the arc-shaped rack 190 and moves to a position opposite the first electric push rod 131, the turntable 430 pauses. At this time, the first electric push rod 131 extends and pushes the bevel gear ring 130 to slide back to its original position. Thus, the round piston rod 152 is pressed back into the round piston cylinder 150. At this time, the air in the round piston cylinder 150 is transferred to the rectangular piston cylinder 142, causing the rectangular piston rod 143 to return to its original position, facilitating the subsequent correction of the diode polarity.

[0025] Arc-shaped strip protrusions with the same curvature as the arc-shaped rack 190 are provided on both sides of the arc-shaped rack 190. When the bevel gear ring 130 meshes with the arc-shaped rack 190, it is located between the two arc-shaped strip protrusions, ensuring the stable meshing of the bevel gear ring 130 and the arc-shaped rack 190.

[0026] There are two round piston rods 152, which are symmetrically arranged on the placement table 110. Sliders 153 are fixedly connected to the ends of the two round piston rods 152. An annular chute for cooperating with the two sliders 153 is provided on the bevel gear ring 130.

[0027] By providing two round piston cylinders 150 and two corresponding round piston rods 152, the bevel gear ring 130 can receive a balanced driving force. The setting of the sliders 153 enables the bevel gear ring 130 to rotate relative to the round piston rod 152 and also prevents the round piston rod 152 from disengaging from the bevel gear ring 130.

[0028] Two spherical protrusions 121 are symmetrically arranged on one end face of the cylinder 120. Spherical grooves for cooperating with the two spherical protrusions 121 are provided on the placement table 110.

[0029] The spherical protrusion 121 can undergo elastic deformation, enabling the cylinder 120 to rotate. After rotating 180 degrees, the other spherical protrusion 121 is stuck in the spherical groove on the placement table 110, completing the positioning of the cylinder 120. In addition, a hole is drilled on the cylinder 120 with a ball head drill, and the spherical protrusion 121 is replaced with a ball. The ball, a return spring, and a plug are inserted into the drilled hole. When the cylinder 120 rotates, the ball retracts into the end face of the cylinder 120. After the cylinder 120 rotates 180 degrees, the other ball is stuck in the spherical groove on the placement table 110, completing the positioning of the cylinder 120.

[0030] It further includes a shape detection mechanism 200 which is used to detect whether the pins 520 are bent. The shape detection mechanism 200 includes a swing rod 240. A detection rake 241 is fixedly connected to the end of the swing rod 240. When the turntable 430 drives the placement table 110 to face the shape detection mechanism 200, the swing rod 240 swings towards the pins 520 of the upper body 500 of the placement table 110 until it reaches a horizontal state. Then, the swing rod 240 slides away from the placement table 110. When the pins 520 are deformed, the detection rake 241 can contact the pins 520 during sliding and pull the body 500 out of the placement table 110. Also, when the pins 520 are not deformed, the detection rake 241 does not contact the pins 520 during sliding.

[0031] After the swing rod 240 swings down to the horizontal state, the detection rake 241 at the end can drop to the position of the pins 520, and the teeth of the detection rake 241 can be on both sides of the pins 520. Then, the swing rod 240 slides in the horizontal state, so that the teeth of the detection rake 241 move linearly on both sides of the pins 520. If the pins 520 are not deformed, the detection rake 241 will not contact the pins 520, so the detection rake 241 will not pull the diode out of the placement table 110. If the pins 520 are skewed on the horizontal plane, the detection rake 241 can contact the deformed pins 520 during movement, and then the detection rake 241 can pull the diode with deformed pins 520 out of the placement table 110 during movement, avoiding the probe being unable to contact the pins 520 during subsequent detection.

[0032] A swivel base 220 is fixedly connected to the workbench 410. A rotating rod 230 is rotatably connected to the swivel base 220. A first torsion spring 231 is connected between the rotating rod 230 and the swivel base 220. The swing rod 240 is inserted through the middle of the rotating rod 230. When the rotating rod 230 rotates, the swing rod 240 can swing.

[0033] The first torsion spring 231 applies a torsional force to the rotating rod 230, so that the rotating rod 230 can drive the swing rod 240 to lift to a position where it does not contact the placement table 110 and the diode when not under external force, thus making the rotation of the turntable 430 not interfered.

[0034] A connecting seat 250 is fixedly connected to the side wall of the rotating rod 230. A first storage rod 260 is rotatably connected to the connecting seat 250. A second storage rod 270 is coaxially and fixedly connected to the first storage rod 260. A second torsion spring 262 is connected between the first storage rod 260 and the connecting seat 250, and the torsion force of the second torsion spring 262 is greater than that of the first torsion spring 231. One end of the swing rod 240 far from the detection rake 241 is connected to the rotating rod 230 by an elastic cord 242. A first pull rope 261 is wound and connected to the first storage rod 260, and the end of the first pull rope 261 is connected to one end of the swing rod 240 close to the detection rake 241. A small motor 280 is fixedly connected to the workbench 410. The output end of the small motor 280 is fixedly connected to a third storage rod 281, and a second pull rope 271 is connected between the third storage rod 281 and the second storage rod 270.

[0035] The small motor 280 can rotate forward and backward. When detecting the pin 520 of the diode, the small motor 280 rotates forward, so that the third storage rod 281 winds up the second pull rope 271. Since the torsion force of the second torsion spring 262 is higher than that of the first torsion spring 231, at this time, the pulling force of the second pull rope 271 on the second storage rod 270 can cause the rotating rod 230 to swing. A cross bar is also provided on the rotating seat 220. When the rotating rod 230 drives the swing rod 240 to swing to the horizontal state, the swing rod 240 contacts the cross bar. At this time, the rotating rod 230 stops rotating. Subsequently, the third storage rod 281 continues to wind up the second pull rope 271. At this time, the second storage rod 270 and the first storage rod 260 rotate against the torsion force of the second torsion spring 262. Thus, the first storage rod 260 stores the first pull rope 261, and the first pull rope 261 pulls the swing rod 240 to slide on the rotating rod 230, stretching the elastic cord 242. When the small motor 280 rotates in reverse, the third storage rod 281 releases the second pull rope 271. Since the torsion force of the second torsion spring 262 is higher than that of the first torsion spring 231, at this time, the first storage rod 260 first releases the first pull rope 261. At this time, the elastic cord 242 deforms and returns, pushing the swing rod 240 to reset. After the swing rod 240 resets, the detection rake 241 pushes the body 500, further assisting the body 500 to be in the correct position on the placing table 110. Subsequently, the first torsion spring 231 drives the rotating rod 230 to rotate and reset, so that the swing rod 240 is lifted upward. At this time, the turntable 430 rotates, driving the diode with the undeformed pin 520 on the placing table 110 to move to the next working station.

[0036] A blanking hole 210 is formed on the workbench 410 between the rotating seat 220 and the turntable 430.

[0037] The blanking hole 210 is opened between the turntable 220 and the turntable 430. After the detection rake 241 pulls out the diode with the deformed lead 520, the diode with the deformed lead 520 can fall out through the blanking hole 210 and is received by a container placed at the bottom of the blanking hole 210. Subsequently, the lead 520 of the received diode can be corrected.

[0038] It further includes a feeding mechanism 300. The feeding mechanism 300 includes a housing 310 connected to the workbench 410. A transfer track 320 is connected through the housing 310. The transfer track 320 is connected to an external vibrating bowl. The end of the transfer track 320 is connected to a second electric push rod 330. When the second electric push rod 330 extends, it can push the diode on the transfer track 320 into the cylinder 120 on the placement table 110.

[0039] The external vibrating bowl applies vibration to the diodes, so that the diodes are arranged in the required positions after being vibrated and then enter the transfer track 320. The diode moving to the lowest end of the transfer track 320 is pushed by the second electric push rod 330, moves onto the placement table 110, and is inserted into the cylinder 120.

[0040] After the diode corrected by the above-mentioned polarity correction mechanism 100 and detected by the shape detection mechanism 200 moves to the position opposite to the first electric push rod 131, the first electric push rod 131 pushes the bevel gear ring 130 to reset. Subsequently, the first electric push rod 131 shortens. Then, the probe on the detection table 420 moves down to contact the lead 520 of the diode on the placement table 110 for detection; A first blanking track 440 and a second blanking track 450 are also provided on the workbench 410. They are respectively used to convey qualified diodes and unqualified diodes. And small manipulators (not shown in the figure) are provided in both the first blanking track 440 and the second blanking track 450 to grab the detected diodes; The control system compares the acquired values such as voltage and resistance after applying power to the diode with the set values. If it deviates from the set values, when the turntable 430 rotates to face the first blanking track 440 or the second blanking track 450, it controls the corresponding small manipulator to operate to take out the diode. If it is qualified, it also controls the corresponding small manipulator to operate to take out the diode when the turntable 430 rotates to face the first blanking track 440 or the second blanking track 450.

[0041] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A diode quality detection device, the diode includes a body (500), one end of the upper surface of the body (500) has a notch (510), and the other end has a pin (520), the detection device includes a machine body (400), the machine body (400) includes a workbench (410), a turntable (430) is rotatably connected to the workbench (410), and it is characterized in that: A polarity correction mechanism (100) is provided on the turntable (430). The polarity correction mechanism (100) includes a placement table (110). A cylinder (120) is rotatably connected to the placement table (110). A rectangular hole is formed in the middle of the cylinder (120). The body (500) is inserted into the rectangular hole. One end of the placement table (110) facing the center of the turntable (430) is slidably connected to a rectangular piston cylinder (142). A rectangular piston rod (143) is slidably connected in the rectangular piston cylinder (142). A circular piston cylinder (150) communicating with the rectangular piston cylinder (142) is fixedly connected to the placement table (110). A circular piston rod (152) is slidably connected in the circular piston cylinder (150). The output end of the circular piston rod (152) is slidably connected to a bevel gear ring (130). The bevel gear ring (130) is key-slidably connected to the cylinder (120). A detection table (420) is connected to the workbench (410). An arc-shaped rack (190) is connected to the bottom of the detection table (420). When the polarity of the body (500) is reversed, the rectangular piston cylinder (142) slides towards the body (500) and the rectangular piston rod (143) abuts against the body (500), enabling the circular piston rod (152) to extend and push the bevel gear ring (130) to slide in the cylinder (120). Thus, when the turntable (430) rotates, the bevel gear ring (130) can roll on the arc-shaped rack (190), so that the body (500) flips 180 degrees.

2. The diode quality detection device according to claim 1, characterized in that: The polarity correction mechanism (100) further includes a sliding seat (140) radially sliding on the turntable (430). The rectangular piston cylinder (142) is fixedly connected to the top of the sliding seat (140). A convex block (141) is fixedly connected to the side of the sliding seat (140). A spring (160) is connected between the sliding seat (140) and the placement table (110). An arc-shaped baffle (170) and a wedge block (180) are fixedly connected to the lower surface of the detection table (420). When the convex block (141) contacts the wedge block (180), one end of the body (500) close to the pin (520) contacts the inner surface of the arc-shaped baffle (170), so that the body (500) cannot slide relative to the cylinder (120).

3. The diode quality detection device according to claim 2, wherein: A first electric push rod (131) is fixedly connected to the workbench (410). After the turntable (430) drives the placement table (110) to move past the arc-shaped rack (190), the cylinder (120) is aligned with the first electric push rod (131). Thus, when the first electric push rod (131) extends, it can push the bevel gear ring (130) to reset.

4. The diode quality detection device according to claim 3, wherein: There are two described circular piston rods (152), and the two circular piston rods (152) are symmetrically arranged on the placing table (110). Sliders (153) are fixedly connected to the ends of the two circular piston rods (152), and annular sliding grooves for cooperating with the two sliders (153) are formed on the bevel gear ring (130).

5. The diode quality detection device according to claim 4, characterized in that: Two spherical protrusions (121) are symmetrically arranged on one end face of the cylinder (120), and spherical grooves for cooperating with the two spherical protrusions (121) are formed on the placing table (110).

6. The diode quality detection device according to claim 1, characterized in that: It further includes a shape detection mechanism (200). The shape detection mechanism (200) is used to detect whether the pin (520) is bent and includes a swing rod (240). A detection rake (241) is fixedly connected to the end of the swing rod (240). When the turntable (430) drives the placing table (110) to face the shape detection mechanism (200), the swing rod (240) swings towards the pin (520) of the body (500) on the placing table (110) to a horizontal state. Subsequently, the swing rod (240) slides in a direction away from the placing table (110). When the pin (520) is deformed, the detection rake (241) can contact the pin (520) during sliding and pull the body (500) out of the placing table (110). Also, when the pin (520) is not deformed, the detection rake (241) does not contact the pin (520) during sliding.

7. The diode quality detection device according to claim 6, wherein: A turntable (220) is fixedly connected to the workbench (410), and a rotating rod (230) is rotatably connected to the turntable (220). A first torsion spring (231) is connected between the rotating rod (230) and the turntable (220). The swing rod (240) passes through the middle of the rotating rod (230), and the swing rod (240) can swing when the rotating rod (230) rotates.

8. The diode quality detection device according to claim 7, wherein: A connecting seat (250) is fixedly connected to the side wall of the rotating rod (230), and a first receiving rod (260) is rotatably connected to the connecting seat (250). A second receiving rod (270) is coaxially and fixedly connected to the first receiving rod (260). A second torsion spring (262) is connected between the first receiving rod (260) and the connecting seat (250), and the torque of the second torsion spring (262) is greater than that of the first torsion spring (231); An elastic cord (242) is connected between one end of the swing rod (240) far from the detection rake (241) and the rotating rod (230). A first pulling cord (261) is wound and connected to the first receiving rod (260), and the end of the first pulling cord (261) is connected to one end of the swing rod (240) close to the detection rake (241); A small motor (280) is fixedly connected to the workbench (410), and a third receiving rod (281) is fixedly connected to the output end of the small motor (280). A second pulling cord (271) is connected between the third receiving rod (281) and the second receiving rod (270).

9. The diode quality detection device according to claim 7, wherein: A blanking hole (210) is formed on the workbench (410) between the turntable (220) and the rotating disk (430).

10. The diode quality detection device according to claim 1, wherein: It further includes a feeding mechanism (300). The feeding mechanism (300) includes a housing (310) connected to the workbench (410). A transmission track (320) is connected through the housing (310). The transmission track (320) is connected to an external vibrating disk. The end of the transmission track (320) is connected to a second electric push rod (330). When the second electric push rod (330) extends, it can push the diodes on the transmission track (320) into the cylinder (120) on the placement table (110).

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