Braid type resistor detection device and detection method thereof

Abstract

The invention provides a braid type resistance detection device and a detection method thereof. The braid type resistance detection device comprises a braid conveying mechanism, a resistance value detection mechanism, a visual detection mechanism, a pin shearing mechanism and a blanking pipe. The braid conveying mechanism comprises a belt, a tensioning wheel and a conveying track, the conveying track is used for bearing braids, the belt is used for pushing the braids to slide along the conveying track, and the resistance value detection mechanism, the visual detection mechanism and the pin shearing mechanism are sequentially arranged in the sliding direction of the braids; the pin shearing mechanism comprises a cutter and a discharging hopper, the cutter faces the conveying track and is used for separating the resistor body from the braid, and the discharging hopper is located below the cutter and used for guiding the resistor body to enter the discharging pipe. The standby time in the detection process is shortened, the detection efficiency of the braid type resistor is improved, and meanwhile the problem that the detection precision is not accurate due to the fact that the resistor is pulled out midway is solved.

Description

Technical Field

[0001] This invention relates to the field of resistance processing, and in particular to a tape-and-reel resistance testing device and its testing method. Background Technology

[0002] In mass production scenarios, resistors are often packaged using tape and reel packaging. The resistors are shipped in the following condition: Figure 1 As shown, it includes a tape 1 composed of rigid cardboard 21 and adhesive tape 22, and multiple resistor bodies 23 arranged at intervals along the rigid cardboard 21. The leads 24 of the resistor bodies 23 are glued to the rigid cardboard 21 by the adhesive tape 22, and the ends of the leads 24 are exposed, thus fixing the plurality of resistor bodies 23 onto the tape. The tape ensures that the orientation of each resistor body 23 is consistent, so that it can be picked up by a machine and inserted into the PCB board, which facilitates subsequent automated processing.

[0003] However, there are some defective resistor bodies 23 on the tape, such as those without product information engraved on the surface, or those with substandard resistance values ​​due to damage during storage or transfer. Therefore, it is necessary to test and remove defective resistors from the tape when using tape resistors.

[0004] The testing device is equipped with at least a resistance value testing station and a visual inspection station. The former contacts the resistor's leads and tests its resistance value, while the latter determines whether the product's appearance is complete and whether the engraved product information is missing by taking pictures. When a defective product is detected, a robotic arm pulls out the defective resistor body 23. The existing testing device has the following problems: Pin 24 is attached to rigid cardboard 21 by adhesive tape 22. During the process of removing defective products, a reaction force is generated on the rigid cardboard 21. Therefore, the operation of the robot to remove defective products can easily cause the tape to deform, which will prevent the tape from flowing smoothly into the next inspection station and make the inspection equipment unable to operate smoothly. It is necessary to arrange operators to troubleshoot this kind of fault. Furthermore, since there are multiple inspection stations, the process of stopping at each inspection station to inspect the resistance on the tape and then having the robot remove defective products will increase the time occupied by the sorting process and reduce the efficiency of resistance inspection. On the other hand, when defective resistors are removed, the tape will deform, and the position of the remaining resistor bodies 23 on the tape will change, which will interfere with the subsequent stations' inspection of other resistors on the tape, resulting in inaccurate inspection accuracy. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a tape-and-reel resistor detection device that reduces the standby time during the detection process, improves the detection efficiency of tape-and-reel resistors, and avoids the problem of inaccurate detection caused by removing the resistor midway.

[0006] The objective of this invention is achieved through the following technical solution: A tape-and-reel resistance testing device includes: a tape-and-reel conveying mechanism, a resistance value testing mechanism, a vision inspection mechanism, a lead cutting mechanism, and a feeding tube; The tape conveying mechanism includes a belt, a tensioning wheel, and a transmission track. The transmission track is used to carry the tape, and the belt is used to push the tape to slide along the transmission track. The resistance detection mechanism, the vision detection mechanism, and the pin cutting mechanism are arranged sequentially along the tape sliding direction. The pin shearing mechanism includes a cutter and a feeding hopper. The cutter faces the transmission track and is used to separate the resistor body from the tape. The feeding hopper is located below the cutter and is used to guide the resistor body into the feeding tube.

[0007] In one embodiment, both the resistance detection mechanism and the vision detection mechanism are provided with sorting auxiliary components. The sorting auxiliary components include an anti-deviation plate, a floating pressure block, a reset spring, and a pressing cylinder. The anti-deviation plate covers the transmission track, and an opening is provided on the side of the anti-deviation plate near the belt. The anti-deviation plate also has a clearance groove that matches the belt. The floating pressure block is slidably disposed on the anti-deviation plate. One end of the floating pressure block near the opening is bent toward the location of the transmission track to form a pressing head. The reset spring is disposed between the floating pressure block and the anti-deviation plate. The reset spring is used to drive the pressing head away from the resistor body. The pressing cylinder is used to drive the pressing head to press the pins of the resistor body, so as to bend the pins.

[0008] In one embodiment, the resistance detection mechanism includes an insulating pad, a conductive terminal, a probe, and a bracket. The bracket is disposed on the transmission track, and the probe is disposed on the bracket. The probe has a telescopic portion at one end facing the tape. The insulating pad covers the telescopic portion. The conductive terminal is embedded in the insulating pad and is in contact with the telescopic portion. The end of the conductive terminal extends into the transmission track and contacts the pin of the resistor body, so that the probe and the resistor body are connected.

[0009] In one embodiment, there are two probes with a gap between them.

[0010] In one embodiment, a bending auxiliary pad is provided at the position on the transmission track covered by the anti-deviation plate, and the bending auxiliary pad is detachably connected to the transmission track.

[0011] In one embodiment, the pin cutting mechanism further includes an upper shaping gate, a lower shaping gate, and a lifting cylinder. The upper shaping gate is movably disposed above the lower shaping gate. The lifting cylinder is used to drive the upper shaping gate closer to the lower shaping gate so that the upper shaping gate and the lower shaping gate jointly press the pin of the resistor body. A pressure bar is provided at the position where the upper shaping gate and the lower shaping gate contact the pin.

[0012] In one embodiment, there is a gap between the pressure strip and the transmission track.

[0013] In one embodiment, the visual inspection mechanism includes an adjustable frame and a camera and a ring light mounted on the adjustable frame. The camera and the ring light are each provided with a sliding table at the position where they are connected to the adjustable frame.

[0014] In one embodiment, two cameras and one ring light are provided, and the two cameras respectively capture the front and back of the resistor body.

[0015] A detection method, based on the above-mentioned tape-and-reel resistance detection device, includes the following steps: Step 1: Place the tape-and-reel resistor into the tape-and-reel conveyor mechanism, so that the tape is located inside the transmission track and the resistor body is suspended outside the transmission track; Step 2: The belt drives the tape-and-reel resistor to slide along the transmission track. When the tape-and-reel resistor passes the resistance value detection mechanism, the pins on the resistor body contact the resistance value detection mechanism, and the resistance value of each resistor body on the tape-and-reel resistor is detected by the resistance value detection mechanism. Step 3: If the resistance value is qualified, the belt continues to run, driving the tape resistor to continue sliding; if the resistance value is unqualified, the belt stops running, the pressure cylinder drives the floating pressure block to descend, so that the pressing head contacts the pin of the resistor body with unqualified resistance value. The pressing head bends the part of the resistor body suspended outside the transmission track, and the belt restarts. Step 4: The visual inspection agency takes pictures of the tape-and-reel resistors; if there is a defect in the shape of the resistor body, the belt is driven to stop running, the pressure cylinder drives the floating pressure block to descend, so that the pressing head contacts the pin of the resistor body with unqualified resistance value, the pressing head bends the part of the resistor body suspended outside the transmission track, and the belt restarts. Step 5: When the belt drives the tape-type resistor through the lead shearing mechanism, the cutter contacts the leads on the unbent resistor body, causing the resistor body to separate from the tape. The resistor body enters the feeding tube along the feeding hopper to complete the feeding. The bent resistor body avoids the cutter and is discharged from the end of the transmission track along with the tape.

[0016] The aforementioned tape-and-reel resistor detection device and method reduce the standby time during the detection process, improve the detection efficiency of tape-and-reel resistors, and avoid the problem of inaccurate detection caused by removing the resistor midway. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a tape-and-reel resistor. Figure 2 This is a schematic diagram of the tape-and-reel resistance detection device. Figure 3 This is a schematic diagram of the resistance value detection mechanism; Figure 4 This is a schematic diagram of the structure of a visual inspection mechanism; Figure 5 This is a schematic diagram showing the coordination between the upper and lower shaping gates; Figure 6 This is a diagram showing the fit between the bent resistor body and the pressure strip. Figure 7 This is a schematic diagram showing the interaction between the lead cutting mechanism and the tape-and-reel resistor. Figure 8 This is a schematic diagram showing the state of the resistor body after bending. Figure 9 This is a schematic diagram showing the state of the tape-and-reel pusher insulating pad; Figure 10 A schematic diagram showing how a floating pressure block drives the resistor body to bend.

[0019] Reference numerals: 10. Tape-and-reel resistance testing device; 1. Tape; 20. Tape-and-reel resistor; 21. Rigid cardboard; 22. Adhesive tape; 23. Resistor body; 24. Lead; 100. Tape-and-reel conveying mechanism; 110. Belt; 120. Tensioning pulley; 130. Transmission track; 131. Bending auxiliary pad; 200. Resistance value testing mechanism; 210. Insulating pad; 220. Conductive terminal; 230. Probe; 231. Telescopic part; 240. Support; 300. Vision inspection machine Structure; 310, Adjustable distance frame; 320, Camera; 330, Ring fill light; 340, Slide table; 400, Pin shearing mechanism; 410, Cutter; 420, Feed hopper; 430, Upper shaping gate; 440, Lower shaping gate; 450, Lifting cylinder; 460, Pressure bar; 500, Feeding pipe; 600, Sorting auxiliary components; 610, Anti-deviation plate; 611, Clearance groove; 620, Floating pressure block; 621, Pressing head; 630, Return spring; 640, Lowering cylinder; Detailed Implementation

[0020] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] Please see Figure 2 The present invention provides a tape-type resistance detection device 10, which includes: a tape conveying mechanism 100, a resistance value detection mechanism 200, a vision inspection mechanism 300, a lead cutting mechanism 400, and a feeding tube 500.

[0024] Please see Figure 2The tape conveying mechanism 100 includes a belt 110, a tensioning wheel 120, and a transmission track 130. The transmission track 130 is used to carry the tape, and the belt 110 is used to push the tape to slide along the transmission track 130. The resistance value detection mechanism 200, the vision inspection mechanism 300, and the pin cutting mechanism 400 are arranged sequentially along the tape sliding direction.

[0025] Please see Figure 2 and Figure 7 The lead cutting mechanism 400 includes a cutter 410 and a hopper 420. The cutter 410 faces the transmission track 130. When the tape resistor 20 passes under the cutter 410, the cutter 410 contacts the lead 24 and cuts it, separating the resistor body 23 from the tape 1. The hopper 420 is located below the cutter 410. The resistor body 23 cut off by the cutter 410 falls into the hopper 420 under the action of gravity, while the tape 1 continues to move forward along the transmission track 130 and is discharged.

[0026] The tape conveying mechanism 100 carries the tape resistors 20 to be tested and sequentially conveys them to the resistance value detection mechanism 200, the vision inspection mechanism 300, and the lead cutting mechanism 400. The resistance value detection mechanism 200 tests the resistance value of each resistor body 23 on the tape resistor 20. The vision inspection mechanism 300 detects the shape of the resistor body 23 and whether the product information engraved on the surface of the resistor body 23 is complete. Then, the lead cutting mechanism 400 cuts the leads 24 to separate the resistor body 23 from the tape 1.

[0027] Before removing the resistor from the tape 1, the resistance value and appearance integrity of the product must be checked at least twice, that is, the tape resistor 20 must be checked at least twice. In this application, the tape resistor 20 moves linearly on the transmission track 130 throughout the process. The process of moving from the resistance value detection mechanism 200 to the vision inspection mechanism 300 and subsequent work stations does not require handling or transfer by a robot, which can reduce the working time of the tape resistor 20 moving between various inspection mechanisms and help improve inspection efficiency.

[0028] However, once a defective resistor is detected on the tape and reel resistor 20, it needs to be removed by a robotic arm. Specifically, force is applied along the axis of the pin 24 to individually pull the defective resistor body 23 from the tape and reel 1. It is known that there are multiple resistance detection stations, and the tape 1 itself has multiple resistor bodies 23. However, driving the robotic arm to remove defective products from the tape 1 requires stopping the tape resistors 20 from sliding. This means that a sorting action is performed every time a defective product is detected, requiring frequent equipment start-ups and shutdowns, increasing standby time and reducing detection efficiency. Furthermore, the process of removing defective products using the robotic arm applies tension to the tape 1. The tape 1 itself is composed of rigid cardboard 21 and adhesive tape 22, and the tape 1 is prone to deformation when the leads 24 are pulled away. Deformed tape 1 is highly susceptible to jamming in the transmission track 130, causing equipment malfunction. Even without jamming, the deformed tape 1 prevents the resistor bodies 23 from maintaining their alignment, causing positional shifts. This prevents the resistance detection mechanism 200 and the vision inspection mechanism 300 from properly aligning with the resistor bodies 23, leading to misjudgments and errors during detection. To address these issues, this application also makes the following improvements: Please see Figure 2 , Figure 3 and Figure 4 Both the resistance detection mechanism 200 and the vision inspection mechanism 300 are equipped with a sorting auxiliary component 600, which includes an anti-deviation plate 610, a floating pressure block 620, a reset spring 630 and a pressing cylinder 640. Please see Figure 3 and Figure 4 An anti-deviation plate 610 covers the transmission track 130. An opening is provided on the side of the anti-deviation plate 610 near the tape. The resistor body 23 on the tape resistor 20 extends out of the opening and is suspended outside the transmission track 130. An avoidance groove 611 matching the belt 110 is provided on the anti-deviation plate 610. The belt 110 passes through the avoidance groove 611 to maintain contact with the tape 1, ensuring that the belt 110 can drive the tested tape resistor 20 to move when it runs.

[0029] Please see Figure 3 and Figure 10 A floating pressure block 620 is slidably mounted on an anti-deviation plate 610. One end of the floating pressure block 620 near the opening is bent towards the location of the transmission track 130 to form a pressing head 621, meaning the cross-section of the floating pressure block 620 is "L"-shaped. A return spring 630 is located between the floating pressure block 620 and the anti-deviation plate 610, and is used to drive the pressing head 621 away from the resistor body 23. A pressing cylinder 640 is used to drive the pressing head 621 to press the pin 24, causing the pin 24 to bend and thus bending the resistor body 23, causing the pressed resistor body 23 to be offset from the positions of other resistor bodies 23. Figure 10As shown. It should be emphasized that the floating pressure block 620 only performs the bending operation on the defective resistor body 23. The purpose is to separate the defective product from the qualified product, so that the cutter 410 cannot come into contact with the defective product in the subsequent station, and the defective product is left in the tape 1 and discharged with the tape 1.

[0030] Please see Figure 3 In one embodiment, a bending auxiliary pad 131 is provided on the position of the transmission track 130 covered by the anti-deviation plate 610. The bending auxiliary pad 131 is detachably connected to the transmission track 130. When the pressing head 621 presses the pin 24, the bending auxiliary pad 131 provides a limit, so that the pin 24 bends along the edge of the bending auxiliary pad 131, improving the bending accuracy. Moreover, the bending auxiliary pad 131 can be directly disassembled and replaced after wear, reducing the maintenance difficulty.

[0031] Please see Figure 5 and Figure 6 In one embodiment, the pin cutting mechanism 400 further includes an upper shaping gate 430, a lower shaping gate 440, and a lifting cylinder 450. The upper shaping gate 430 is movably disposed above the lower shaping gate 440; and pressure strips 460 are provided at the contact positions between the upper shaping gate 430 and the lower shaping gate 440 and the pin. When the lifting cylinder 450 is activated, the upper shaping gate 430 moves closer to the lower shaping gate 440, and the pressure strips 460 on the two gates cooperate to compress the part to be cut on the pin 24, making the part easier to cut, so that the cutter 410 can cut it.

[0032] Please see Figure 6 and Figure 7 Furthermore, there is a gap between the pressure bar 460 and the transmission track 130. After the tape 1 enters the lead cutting mechanism 400, the qualified resistor body 23 remains in its original shape, while the defective product is bent. The bent resistor body 23 is located in the aforementioned gap, that is, the pressure bar 460 does not squeeze the leads 24 of the defective product, and the cutter 410 does not cut the defective product. Figure 7 As shown, the defective resistor is discharged by continuing to slide along the transmission track 130 with the tape 1.

[0033] This application also provides a detection method based on the above-described tape-and-reel resistance detection device 10, comprising the following steps: Step 1: Place the tape-type resistor 20 into the tape-conveying mechanism 100, so that the tape 1 is located inside the transmission track 130 and the resistor body 23 is suspended outside the transmission track 130. The resistor bodies 23 on the tape-type resistor under test 20 are flush. During transportation, the tape 1 is located in the transmission track 130. The belt 110 is in contact with the tape 1. The belt 110 pulls the tape 1 through friction, causing it to slide along the transmission track 130.

[0034] Step 2: The belt 110 drives the tape resistor 20 to slide along the transmission track 130. When the tape resistor 20 passes the resistance value detection mechanism 200, the pins 24 on the resistor body 23 contact the resistance value detection mechanism 200, and the resistance value of each resistor body 23 on the tape resistor is detected by the resistance value detection mechanism 200. Before testing, the target resistance value of the corresponding product to be tested is written. If the actual resistance value measured by the resistance value detection mechanism 200 is the same as the target resistance value, the tested resistor body 23 is qualified; otherwise, the tested resistor body 23 is unqualified.

[0035] Step 3: If the resistance value is qualified, the belt 110 continues to run, driving the tape resistor to continue sliding; if the resistance value is unqualified, the belt 110 is driven to stop running, the pressing cylinder 640 drives the floating pressure block 620 to descend, so that the pressing head 621 contacts the pin 24 of the resistor body 23 with unqualified resistance value. The pressing head 621 bends the part of the resistor body 23 suspended outside the transmission track 130, and the belt 110 restarts. Resistor body 23 with an unqualified resistance value is a defective product. When a defective product is identified, it is bent using the pressing head 621 to separate the defective product from the qualified product.

[0036] Step 4: The visual inspection unit 300 takes a picture of the tape and reel resistor; if there is a defect in the shape of the resistor body, the belt 110 is driven to stop running, the pressure cylinder 640 drives the floating pressure block 620 to descend, so that the pressing head 621 contacts the pin of the resistor body with unqualified resistance value. The pressing head 621 bends the part of the resistor body suspended outside the transmission track 130, and the belt 110 restarts. Before testing, an image of the qualified resistor body 23 is recorded, including its shape and product information and production date engraved on its surface. The visual inspection agency 300 takes a picture of the tape resistor and compares it with the recorded image. If the resistor body 23 is deformed or the product information engraved on its surface is incomplete, it is considered a defective product. Resistor bodies 23 that fail the appearance inspection are also considered defective products. They are bent by the pressing head 621 to separate the defective products from the qualified products.

[0037] Step 5: When the belt 110 drives the tape-type resistor through the lead cutting mechanism 400, the cutter 410 contacts the lead 24 on the unbent resistor body 23, causing the resistor body 23 to separate from the tape 1. The resistor body 23 enters the feeding tube 500 along the feeding hopper 420 to complete the feeding. The bent resistor body avoids the cutter 410 and is discharged from the end of the transmission track 130 along with the tape.

[0038] like Figure 8As shown, the bent resistor body 23 is bent at 90°. When the tape 1 enters the pin cutting mechanism 400, the cutter 410 cannot reach the pin 24 of the defective product. In this way, the defective product will remain connected to the tape 1 and continue to slide and be discharged along the transmission track 130 with the tape 1. The qualified product is cut off by the cutter 410 and discharged from the feed tube 500.

[0039] Please see Figure 4 In one embodiment, the visual inspection mechanism 300 includes an adjustable frame 310 and a camera 320 and a ring light 330 mounted on the adjustable frame 310. Both the camera 320 and the ring light 330 have sliding tables 340 at their connection points with the adjustable frame 310. Two cameras 320 and two ring lights 330 are provided, each capturing images of the front and back of the resistor body. The positions of the ring light 330 and the camera 320 can be adjusted using the adjustable frame 310 to better accommodate different sizes of tape-and-reel resistors 20.

[0040] Please see Figure 3 and Figure 9 In one embodiment, the resistance detection mechanism 200 includes an insulating pad 210, a conductive terminal 220, a probe 230, and a bracket 240. The bracket 240 is disposed on the transmission track 130, and the probe 230 is disposed on the bracket 240. There are two probes with a gap between them. The probe 230 has a telescopic part 231 on the end facing the tape. The telescopic part 231 is elastic. When force is applied, the telescopic part 231 contracts and will extend again after the external force is removed. Please see Figure 3 and Figure 9 An insulating pad 210 encloses the telescopic part 231, and a conductive terminal 220 is embedded within the insulating pad 210, with the conductive terminal 220 in contact with the telescopic part 231. The end of the conductive terminal 220 extends into the transmission track 130 and contacts the pin 24, so that the probe 230 is connected to the resistor body 23. When a tape-type resistor 20 passes through the transmission track 130, the pushing force generated when the tape 1 contacts the insulating pad 210, due to the insulating pad 210 being located on the telescopic part 231, causes the telescopic part 231 to contract. The insulating pad 210 makes room for the tape 1 to pass through, and since the pin 24 on the tape-type resistor 20 is exposed, the conductive terminal 220 will contact the pin 24 when the tape 1 passes through the insulating pad 210, so that the probe 230 is connected to the resistor body 23 for resistance value detection.

[0041] It should be noted that as the tape 1 passes under the insulating pad 210, the pins 24 of each resistor body 23 will contact the conductive terminal 220. When two pins 24 on the same resistor body 23 are contacted, the probe 230 is connected to that resistor body 23, and the resistance value can be measured. Conversely, if two pins 24 on different resistor bodies 23 are contacted, since there is no electrical connection between the resistor bodies 23 on the tape 1, adjacent resistor bodies 23 are in an insulating state, and the measured resistance value will exceed the instrument's range. This eliminates the possibility of the probe 230 contacting two adjacent resistor bodies 23. Therefore, the resistance measurement process does not require a separate lifting drive component to drive the probe 230 to contact the pins 24. Furthermore, only the speed of the belt 110 needs to be reduced to allow the pins 24 to contact the conductive terminal 220 during the test, without stopping the tape 1, which improves testing efficiency.

[0042] The above-mentioned tape-and-reel resistance testing device 10 and its testing method have the following beneficial effects: 1. Sorting auxiliary components 600 are configured at each detection position to bend the detected defective products so that the defective products are staggered from other resistor bodies 23. The bent defective products can be skipped during subsequent detection, which can save detection time and improve the detection efficiency of tape and reel resistors. 2. It is not necessary to configure a separate sorting robot to remove defective products at each inspection station. This saves the time of removing defective products, improves inspection efficiency, and avoids damage or deformation of the tape 1 caused by the removal of defective products. It also avoids the problem of material jamming caused by the deformation of the tape 1 and the problem of inaccurate inspection accuracy caused by the positional displacement of the other resistor bodies 23 due to the deformation of the tape 1.

[0043] 3. Because defective products are bent, the cutter 410 only contacts the qualified resistor body 23 during unloading. In this way, the qualified products are cut off and unloaded, while the defective products remain on the tape 1 and are discharged together with the tape 1. This avoids defective products from being mixed with qualified resistors and ensures sorting accuracy.

[0044] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A tape-and-reel resistor detection device, used for sorting defective products on tape-and-reel resistors and separating the tape from the qualified resistor body, characterized in that, include: Tape and reel conveying mechanism, resistance value detection mechanism, vision inspection mechanism, lead shearing mechanism, and feeding tube; The tape conveying mechanism includes a belt, a tensioning wheel, and a transmission track. The transmission track is used to carry the tape, and the belt is used to push the tape to slide along the transmission track. The resistance detection mechanism, the vision detection mechanism, and the pin cutting mechanism are arranged sequentially along the tape sliding direction. The pin shearing mechanism includes a cutter and a feeding hopper. The cutter faces the transmission track and is used to separate the resistor body from the tape. The feeding hopper is located below the cutter and is used to guide the resistor body into the feeding tube.

2. The tape-and-reel resistance detection device according to claim 1, characterized in that, Both the resistance detection mechanism and the vision detection mechanism are equipped with sorting auxiliary components. The sorting auxiliary components include an anti-deviation plate, a floating pressure block, a reset spring, and a pressing cylinder. The anti-deviation plate covers the transmission track. An opening is provided on the side of the anti-deviation plate near the belt, and an avoidance groove matching the belt is provided on the anti-deviation plate. The floating pressure block is slidably disposed on the anti-deviation plate. One end of the floating pressure block near the opening is bent toward the location of the transmission track to form a pressing head. The reset spring is disposed between the floating pressure block and the anti-deviation plate. The reset spring is used to drive the pressing head away from the resistor body. The pressing cylinder is used to drive the pressing head to press the pins of the resistor body, so as to bend the pins.

3. The tape-and-reel resistance detection device according to claim 2, characterized in that, The resistance detection mechanism includes an insulating pad, a conductive terminal, a probe, and a support. The support is disposed on the transmission track, and the probe is disposed on the support. The probe has a telescopic part on one end facing the tape. The insulating pad covers the telescopic part. The conductive terminal is embedded in the insulating pad and is in contact with the telescopic part. The end of the conductive terminal extends into the transmission track and contacts the pin of the resistor body, so that the probe and the resistor body are connected.

4. The tape-and-reel resistance detection device according to claim 3, characterized in that, The probe is provided in two parts, and there is a gap between the two probes.

5. The tape-and-reel resistance detection device according to claim 2, characterized in that, A bending auxiliary pad is provided at the position on the transmission track covered by the anti-deviation plate, and the bending auxiliary pad is detachably connected to the transmission track.

6. The tape-and-reel resistance detection device according to claim 1, characterized in that, The pin cutting mechanism further includes an upper shaping gate, a lower shaping gate, and a lifting cylinder. The upper shaping gate is movably disposed above the lower shaping gate. The lifting cylinder is used to drive the upper shaping gate closer to the lower shaping gate so that the upper shaping gate and the lower shaping gate jointly press the pin of the resistor body. Pressure strips are provided at the contact positions between the upper shaping gate and the lower shaping gate and the pin.

7. The tape-and-reel resistance detection device according to claim 6, characterized in that, There is a gap between the pressure strip and the transmission track.

8. The tape-and-reel resistance detection device according to claim 1, characterized in that, The visual inspection mechanism includes an adjustable frame and a camera and a ring light mounted on the adjustable frame. The camera and the ring light are each equipped with a sliding table at the position where they are connected to the adjustable frame.

9. The tape-and-reel resistance detection device according to claim 8, characterized in that, Two cameras and one ring light are provided, and the two cameras respectively capture the front and back of the resistor body.

10. A detection method, based on the tape-and-reel resistance detection device according to any one of claims 2 to 9, characterized in that, Includes the following steps: Step 1: Place the tape-and-reel resistor into the tape-and-reel conveyor mechanism, so that the tape is located inside the transmission track and the resistor body is suspended outside the transmission track; Step 2: The belt drives the tape-and-reel resistor to slide along the transmission track. When the tape-and-reel resistor passes the resistance value detection mechanism, the pins on the resistor body contact the resistance value detection mechanism, and the resistance value of each resistor body on the tape-and-reel resistor is detected by the resistance value detection mechanism. Step 3: If the resistance value is qualified, the belt continues to run, driving the tape-type resistor to continue sliding; If the resistance value is not up to standard, the belt will stop running, the pressure cylinder will drive the floating pressure block to descend, so that the pressing head contacts the pin of the resistor body with the unqualified resistance value. The pressing head will bend the part of the resistor body that is suspended outside the transmission track, and the belt will restart. Step 4: The visual inspection agency takes pictures of the tape-and-reel resistors; if there is a defect in the shape of the resistor body, the belt is driven to stop running, the pressure cylinder drives the floating pressure block to descend, so that the pressing head contacts the pin of the resistor body with unqualified resistance value, the pressing head bends the part of the resistor body suspended outside the transmission track, and the belt restarts. Step 5: When the belt drives the tape-type resistor through the lead shearing mechanism, the cutter contacts the leads on the unbent resistor body, causing the resistor body to separate from the tape. The resistor body enters the feeding tube along the feeding hopper to complete the feeding. The bent resistor body avoids the cutter and is discharged from the end of the transmission track along with the tape.

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