A high-efficiency and high-precision detection mechanism for silicon steel sheets

Abstract

The present invention relates to a high-efficiency and high-precision detection mechanism for silicon steel sheets, comprising a material guide trough and a through gauge, wherein the through gauge is installed at the top of the material guide trough, and the through gauge comprises a first induction switch, a first baffle, a reset tension spring and a first movable lever, wherein the first baffle is movably connected to the top of the material guide trough, and the lowest end face of the first baffle is located at the upper difference position of the thickness of the product, and the first baffle drives the end of the first movable lever to contact and connect with the first induction switch through the reset tension spring. This solution aims to solve the problem that in the stamping production of silicon steel sheets, the thickness of all parts of the silicon steel sheet parts is inspected after pressing, and the parts are used to rotate the baffle to judge whether the size of the parts is qualified. This is direct and efficient, and there is no restriction on the production cycle. The parts only need to pass under the baffle to complete the inspection, and the actual error size of the parts is amplified to notify the contact point on the sensor. The displacement change of the contact is many times that of the parts, and the detection accuracy and work efficiency are high.

Description

Technical Field

[0001] The invention relates to the technical field of thickness detection, and in particular to a high-efficiency and high-precision detection mechanism for silicon steel sheets. Background Art

[0002] In the field of high-speed stamping of silicon steel sheets, most products are now riveted parts, and the thickness of each part is generally about 8-35mm. Because such parts are generally installed in the position where the coils of various electrical appliances are located, they are generally matched with coil skeletons or directly used as installation positioning parts. Therefore, the thickness requirements of such parts are relatively high, and the dimensional tolerance is generally ±0.02, and convex points are not allowed on the surface of the parts. At present, such parts are generally inspected manually and visually to see if there are burrs and convex points on the parts that affect the installation dimensions, which consumes manpower and cannot achieve full inspection.

[0003] However, if manual inspection is used, the work efficiency is low and the labor cost is high. If an automatic measuring instrument is used, the thickness detection is a back and forth movement of the detector in the upper and lower planes, the detection operation efficiency is low, the equipment cost is high, and the investment is high. Summary of the invention

[0004] The object of the present invention is to provide a high-efficiency and high-precision detection mechanism for silicon steel sheets to solve the problems encountered in the above-mentioned background technology.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] A high-efficiency and high-precision detection mechanism for silicon steel sheets comprises a material guide trough and a through gauge, wherein the through gauge is installed on the top of the material guide trough, and the through gauge comprises a first induction switch, a first baffle, a reset tension spring and a first movable lever, wherein the first baffle is movably connected to the top of the material guide trough, the lowest end surface of the first baffle is located at a thickness difference position of the product, and the first baffle drives the end of the first movable lever to contact and connect with the first induction switch through the reset tension spring.

[0007] In the above scheme, the through gauge also includes a first bearing seat, a first fixed plate, and a first fixed gear rod. The first bearing seat is provided with two respectively installed on both sides of the material guide groove. The inner sides of the two first bearing seats are rotatably connected to the first baffle plate through a first rotating shaft. The outer side of the top of one of the first bearing seats is fixedly connected to the first fixed plate, and the outer side of the top of the other first bearing seat is fixedly connected to the first fixed gear rod. A first connecting portion is provided on the side of the first baffle plate close to the first fixed plate. The first fixed plate is an L-shaped structure. The reset spring is connected between the first connecting portion and the side plate of the first fixed plate. The front part of the side of the first baffle plate close to the first fixed gear rod is fixedly connected to the first movable gear rod. A first sensing spring is provided at the end of the first movable gear rod, and a first sensing contact is provided at the top of the first fixed gear rod. The first sensing contact is electrically connected to the first sensing spring, and the first sensing contact and the first sensing spring constitute the first sensing switch.

[0008] The above scheme also includes a stop gauge, which is installed on the top of the material guide trough. The stop gauge includes a second induction switch, a second baffle, a thrust spring and a second movable gear rod. The second baffle is movably connected to the top of the material guide trough, and the lowest end surface of the second baffle is located at the lower thickness difference position of the product. The second baffle drives the end of the second movable gear rod to contact and connect with the second induction switch through the thrust spring.

[0009] In the above scheme, the stop gauge also includes a second bearing seat, a second fixed plate, and a second fixed gear rod. The second bearing seat is provided with two second bearing seats respectively installed on both sides of the material guide groove. The inner sides of the two second bearing seats are rotatably connected to the second baffle plate through a second rotating shaft. The outer side of the top of one of the second bearing seats is fixedly connected to the second fixed plate, and the outer side of the top of the other second bearing seat is fixedly connected to the second fixed gear rod. A second connecting portion is provided on the side of the second baffle plate close to the second fixed plate. The second fixed plate is a U-shaped structure. The thrust spring is connected between the second connecting portion and the rear side plate of the second fixed plate. The rear part of the side of the second baffle plate close to the second fixed gear rod is fixedly connected to the second movable gear rod. A second sensing spring is provided at the end of the second movable gear rod, and a second sensing contact is provided at the top of the second fixed gear rod. The second sensing contact is electrically connected to the second sensing spring. The second sensing contact and the second sensing spring constitute the second sensing switch.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: This solution aims to solve the production link in which the silicon steel sheet parts composed of stacked rivets need to be pressed during the stamping production of silicon steel sheets, and the thickness of all parts is also inspected after pressing. The parts will cause the baffle to rotate to determine whether the size of the parts is qualified. This is direct and efficient, and there is no restriction on the production cycle. The parts only need to pass under the baffle to complete the inspection. By amplifying the actual size of the parts to notify the contact points on the sensor, the displacement change of the contact is many times that of the parts, and the size detection error of the parts can be well controlled within ±0.01. The detection accuracy is high, and the mechanism has a simple structure. As long as the silicon steel sheet parts pass through, they can be detected. The work efficiency is high. After the parts meet the accuracy requirements, the accuracy of the inspection can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Among them:

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0013] Figure 2 A schematic diagram of a three-dimensional structure from another viewing angle of the present invention;

[0014] Figure 3 It is a front view structural schematic diagram of the present invention;

[0015] Figure 4 It is a schematic diagram of the top view structure of the present invention;

[0016] Figure 5 It is a schematic diagram of the three-dimensional structure of the general gauge in the present invention;

[0017] Figure 6 It is a schematic diagram of the three-dimensional structure of another viewing angle of the general rule in the present invention;

[0018] Figure 7 It is a schematic diagram of the three-dimensional structure of the stop rule of the present invention;

[0019] Figure 8 It is a three-dimensional structural schematic diagram of another viewing angle of the suspension rule of the present invention;

[0020] Fig. 9 It is a schematic diagram of the principle of error amplification in the present invention.

[0021] Numbers in the figure: 1- guide trough; 2- through gauge; 20- first induction switch; 21- first bearing seat; 22- first baffle; 23- first rotating shaft; 24- first fixed plate; 25- reset spring; 26- first movable lever; 27- first fixed lever; 28- first induction spring; 29- first induction contact; 201- first stop screw; 202- first square shaft; 3- stop gauge; 30- induction switch; 31- first bearing seat; 32 -first baffle; 33-first rotating shaft; 34-first fixed plate; 35-thrust spring; 36-first movable lever; 37-first fixed lever; 38-first induction spring; 39-first induction contact; 301-second stop screw; 302-second square shaft; 303-third stop screw; 4-first pushing device; 41-first cylinder; 42-first push plate; 5-second pushing device; 51-second cylinder; 52-second push plate. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is now further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the relevant components of the present invention.

[0023] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] Embodiment 1, as Figures 1 to 4 As shown, a high-efficiency and high-precision detection mechanism for silicon steel sheets includes a material guide trough 1 and a through gauge 2. The material guide trough 1 is used to be installed at the discharge port of the automation equipment. It can be a silicon steel sheet composed of stacked riveted parts, or other parts of the product, or a product with a certain thickness and capable of continuous output.

[0025] During implementation, a guide trough 1 is installed at the rear of the automatically pressed silicon steel sheet stack, so that the parts are sorted in the guide trough 1. The bottom of the guide trough 1 is made of a 0.8-meter-long flat stainless steel plate. Each part is pushed into the press from the side by a cylinder. After the silicon steel sheet stack is pressed, the cylinder at the rear of the guide trough 1 pushes the parts into the guide trough 1 one by one. Each part moves forward in the trough in sequence due to the thrust of the rear cylinder, and can also be transported continuously in sequence by a moving conveyor belt.

[0026] The through gauge 2 is installed on the top of the guide trough 1 to detect the thickness difference of the silicon steel sheets passing through with high efficiency and high precision.

[0027] The through gauge 2 includes a first induction switch 20, a first baffle 22, a reset spring 25 and a first movable lever 26. The first baffle 22 is movably connected to the top of the guide trough 1. The first baffle 22 can be a vertical structure or tilted. In this embodiment, it is tilted to adjust the height. The lowest end surface of the first baffle 22 is located at the upper difference position of the thickness of the product. The first baffle 22 drives the end of the first movable lever 26 to contact and connect with the first induction switch 20 through the reset spring 25.

[0028] For details, please refer to Figure 5 and Figure 6 The through gauge 2 further includes a first bearing seat 21, a first fixing plate 24, and a first fixing lever 27. Two first bearing seats 21 are provided, which are respectively installed on both sides of the guide trough 1. The inner sides of the two first bearing seats 21 are rotatably connected with the first baffle plate 22 through the first rotating shaft 23. The first rotating shaft 23 is installed on the first bearing seat 21 through a precision bearing. The outer side of the top of one of the first bearing seats 21 is fixedly connected with the first fixing plate 24 by screws, and the outer side of the top of the other first bearing seat 21 is fixedly connected with the first fixing lever 27 by welding.

[0029] The distance from the top of the first movable lever 26 to the center of the first rotating shaft 23 is at least twice the distance from the lowest end surface of the first baffle 22 to the center of the first rotating shaft 23, thereby conveniently magnifying the error of the difference in part thickness by at least twice.

[0030] See also Fig. 9 , when the distance from the top of the first movable lever 26 to the center of the first rotating shaft 23 is four times the distance from the lowest end surface of the first baffle 22 to the center of the first rotating shaft 23: the first baffle 22 is installed below the first square shaft 202 and the angle between the platform of the guide trough 1 is about 45°, which is conducive to the passage of parts. However, when the upper surface of the part contacts the first baffle 22 and causes the first baffle 22 to rotate, the angle between the lowest end of the first baffle 22 and the rotation center on the first bearing seat 21 is 60°. The distance from the lowest end to the rotation center of the first rotating shaft 23 is about 50mm. For every 0.02mm rise of the part, the distance moved by the baffle in the 60° tangent direction is 0.02 / cos60°=0.04mm. The overall rotation angle of the detection mechanism is 0.04*360 / (2π*50)=0.0458°. The distance between the top contact point of the first movable lever 26 and the rotation center of the first rotating shaft 23 is about 200 mm, so the moving distance of the contact point in the arc length direction is 2π*200*0.0458 / 360=0.1598 mm.

[0031] The distance that the baffle moves in the 60° tangential direction for every 0.02mm elevation of the part is 0.02 / cos60°=0.04mm, where 0.02 is the material size change and 0.04 is the baffle angle displacement. Therefore, the inclination angle of the first baffle 22 will also bring about the effect of magnifying the error. The distance from the top of the first movable lever 26 to the center of the first rotating shaft 23 is at least four times the distance from the lowest end surface of the first baffle 22 to the center of the first rotating shaft 23. Combined with the magnification of the angle, it is convenient to magnify the error of the difference in part thickness by at least 8 times. Excluding the gaps and slight deformations between the parts, the induction sensitivity of the through gauge 2 magnifies the part size error by about 7-9 times.

[0032] The connection between the first rotating shaft 23 and the first bearing seat 21 uses a high-precision light-load bearing and is equipped with a clearance elimination mechanism to ensure that the first baffle 22 rotates sensitively without gaps and does not cause misjudgment. The first movable baffle 26 and the first fixed baffle 27 use L-shaped aluminum alloy rods, which not only ensure sufficient rigidity but also have a very light moment of inertia, so that the contact point reacts sensitively and the parts have slight changes. The displacement of the induction reed and the induction contact is amplified through the through gauge 2 mechanism, ensuring the authenticity of the reflected part size.

[0033] A first connection part is fixed on the side of the first baffle 22 close to the first fixed plate 24. The first connection part is in a square structure. The first fixed plate 24 is in an L-shaped structure. The reset tension spring 25 is connected between the first connection part and the side plate of the first fixed plate 24 to exert tension on both. The front part of the first baffle 22 close to the first fixed lever 27 is welded and fixedly connected to the first movable lever 26. The end of the first movable lever 26 is installed with a first induction spring 28. The top of the first fixed lever 27 is installed with a first induction contact 29. The first induction contact 29 is electrically connected to the first induction spring 28. The first induction contact 29 and the first induction spring 28 constitute a first induction switch 20. The first baffle 22 drives the end of the first movable lever 26 to contact and connect with the first induction switch 20 through the reset tension spring 25. The first induction switch 20 is connected to the PLC system. After the first induction contact 29 and the first induction spring 28 are in contact, the conditions are provided for the PLC system to make a command action.

[0034] The output end of the through gauge 2 is provided with a first pusher device 4 for pushing out unqualified silicon steel sheet products. The first pusher device 4 includes a first cylinder 41 and a first pusher plate 42. The first cylinder 41 is installed on the outside of the guide trough 1, and the first pusher plate 42 is installed on the groove surface of the guide trough 1. The first pusher plate 42 is an inverted U-shaped structure, and the first cylinder 41 is connected to the first pusher plate 42 in a transmission connection. The U-shaped groove of the first pusher plate 42 is buckled on the guide trough 1. When unqualified products are detected, it takes action after obtaining the instruction of the PLC and pushes the unqualified products into the waste box.

[0035] As a preferred solution, in one embodiment, a first stop screw 201 is threadedly connected to the side plate of the first fixing plate 24, and the axis of the first stop screw 201 is arranged parallel to the axis of the return tension spring 25. The distance between the first connecting portion and the side plate of the first fixing plate 24 is adjusted by screwing the first stop screw 201, thereby adjusting the height of the bottom of the first baffle 22 from the top of the guide trough 1.

[0036] As a preferred solution, in one embodiment, a first square shaft 202 is fixed to the top of the first baffle 22. The first square shaft 202 is a square structure, so as to facilitate welding and fixing the first baffle 22, the first connecting portion, and the first movable lever 26. One side of the first square shaft 202 is fixedly connected to the first connecting portion, and the front portion of the other side of the first square shaft 202 is fixedly connected to the first movable lever 26. The first baffle 22, the first connecting portion, and the first movable lever 26 can be an integrated structure with the first square shaft 202 to facilitate production and manufacturing, and can also be fixed by welding for simplicity.

[0037] In this embodiment, a first baffle plate 22 for detection is provided in the through gauge 2. The first baffle plate 22 is mounted on the first square shaft 202. The first baffle plate 22 and the stainless steel plane of the lower guide trough 1 form a certain angle in the forward direction of the parts, so that the silicon steel sheet parts with thickness exceeding the size can push the first baffle plate 22 to rotate. There are round grooves at both ends of the first square shaft 202 to fix the first rotating shaft 23, and the first rotating shaft 23 is mounted on the first bearing seat 21 through precision bearings. The left and right pairs of first bearing seats 21 are respectively fixed on both sides of the outside of the guide trough 1. There is a certain gap between the first baffle plate 22 and the guide trough 1. The gap can be adjusted by tightening the screw of the first stop screw 201 between the first connecting part and the side plate of the first fixed plate 24, and is generally adjusted to the upper difference of the thickness of the parts. When the parts pass through the gap between the first baffle plate 22 and the guide trough 1, the parts with thickness lower than the allowable upper difference move forward normally in the guide trough, and the silicon steel sheet parts with thickness higher than the upper difference will push the first baffle plate 22 to flip and drive the first square shaft 202 to rotate. The first square shaft 202 is also equipped with a first movable stopper 26. The L-shaped structure of the two is relatively rigid. When the first square shaft 202 rotates, the end of the first movable stopper 26 rotates at a constant angle because the rotation radius is very long, which increases the displacement. The first induction spring 28 of the first movable stopper 26 will contact the first induction contact 29 on the first fixed stopper 27. The first induction contact 29 notifies the PLC through a signal that the thickness of the part exceeds the upper difference. The PLC controls the solenoid valve to make the first cylinder 41 installed behind the through gauge 2 push the part from the side to move out of the guide trough 1 and into the waste box. At this time, the part in the guide trough 1 is pushed forward by the parts that continuously enter the back of the guide trough, and then the next silicon steel sheet part is detected.

[0038] When the thickness difference of the parts meets the size, the first connecting part on the first square shaft 202 is reset by the tension of the tension spring 25 and hits the first stop screw 201 with a limiting function and the first baffle 22 without contact, or the first baffle 22 rotates slightly around the first rotating shaft 23. At this time, the first sensing spring 28 on the first movable baffle rod 26 and the first sensing contact 29 on the first fixed baffle rod 27 are not in contact, and the cylinder returns to the initial state. The parts that meet the size difference can move forward to the stop gauge 3 detection link.

[0039] Embodiment 2, on the basis of embodiment 1, as Figures 1 to 4 As shown, it also includes a stop gauge 3, which is installed on the top of the guide trough 1 to perform high-efficiency and high-precision detection of the thickness difference of the silicon steel sheet passing through.

[0040] The stop gauge 3 includes a second induction switch 30, a second baffle 32, a thrust spring 35 and a second movable lever 36. The second baffle 32 is movably connected to the top of the guide trough 1. The second baffle 32 can be a vertical structure or tilted. In this embodiment, it is tilted to adjust the height. The lowest end surface of the second baffle 32 is located at the lower thickness difference position of the product. The second baffle 32 drives the end of the second movable lever 36 to contact and connect with the second induction switch 30 through the thrust spring 35.

[0041] For details, please refer to Figure 5 and Figure 6 The stop gauge 3 further includes a second bearing seat 31, a second fixing plate 34, and a second fixing lever 37. The second bearing seat 31 is provided with two second bearing seats 31 respectively installed on both sides of the guide trough 1. The inner sides of the two second bearing seats 31 are rotatably connected with the second baffle plate 32 through the second rotating shaft 33. The second rotating shaft 33 is installed on the first bearing seat 21 through a precision bearing. The outer side of the top of one of the second bearing seats 31 is fixedly connected with the second fixing plate 34 by screws, and the outer side of the top of the other second bearing seat 31 is fixedly connected with the second fixing lever 37 by welding.

[0042] The distance from the top of the second movable lever 36 to the center of the second rotating shaft 33 is at least twice the distance from the lowest end surface of the second baffle 32 to the center of the second rotating shaft 33, thereby conveniently realizing at least two times the magnification of the error of the part thickness difference.

[0043] The principle of the stop gauge 3 is similar to that of the through gauge 2, and the magnification effect is also similar. When the distance from the top of the second movable lever 36 to the center of the second rotating shaft 33 is four times the distance from the lowest end surface of the second baffle 32 to the center of the second rotating shaft 33:

[0044] The second baffle 32 is installed below the second square shaft 302, and the angle between it and the platform of the guide trough 1 is about 45°, which is conducive to the passage of parts. However, when the upper surface of the part contacts the second baffle 32 and causes the second baffle 32 to rotate, the angle between the lowermost end of the second baffle 32 and the line connecting the rotation center on the second bearing seat 31 is 60°. The distance from the lowermost end to the rotation center of the second rotating shaft 33 is about 50mm. The distance of the baffle moving in the 60° tangent direction for every 0.02mm of the part is raised is 0.02 / cos60°=0.04mm, and the overall rotation angle of the detection mechanism is 0.04*360 / (2π*50)=0.0458°. The distance between the top contact position of the second movable lever 36 and the rotation center of the second rotating shaft 33 is about 200mm, which shows that the moving distance of the contact in the arc length direction is 2π*200*0.0458 / 360=0.1598mm.

[0045] The distance that the baffle moves in the 60° tangential direction for every 0.02mm elevation of the part is 0.02 / cos60°=0.04mm, where 0.02 is the material size change and 0.04 is the baffle angle displacement. Therefore, the inclination angle of the second baffle 32 will also bring about the effect of magnifying the error. The distance from the top of the second movable lever 36 to the center of the second rotating shaft 33 is at least four times the distance from the lowest end surface of the second baffle 32 to the center of the second rotating shaft 33. Combined with the magnification of the angle, it is convenient to magnify the error of the thickness difference of the part by at least 8 times. Excluding the gaps and slight deformations between the parts, the induction sensitivity of the through gauge 2 magnifies the part size error by about 7-9 times.

[0046] As in Example 1, the connection between the second rotating shaft 33 and the second bearing seat 31 also uses a high-precision light-load bearing, and is equipped with a clearance elimination mechanism to ensure that the second baffle 32 rotates sensitively without gaps and does not cause misjudgment. The second movable baffle 36 and the second fixed baffle 37 are L-shaped aluminum alloy rods, which ensure sufficient rigidity and very light rotational inertia, so that the contact point reacts sensitively and the parts have slight changes. The displacement of the induction spring and the induction contact is magnified by the stop gauge 3 mechanism, ensuring the authenticity of the part size.

[0047] A second connection part is fixed on the side of the second baffle 32 close to the second fixed plate 34. The second connection part is in a block-shaped structure. The second fixed plate 34 is in a U-shaped structure. The thrust spring 35 is connected between the second connection part and the rear side plate of the second fixed plate 34. After being compressed by the two, it forms a thrust force on the two. The rear part of the second baffle 32 close to the second fixed lever 37 is welded and fixedly connected with the second movable lever 36. The end of the second movable lever 36 is installed with a second sensing spring 38. The top of the second fixed lever 37 is installed with a second sensing contact 39. The second sensing contact 39 is electrically connected with the second sensing spring 38. The second sensing contact 39 and the second sensing spring 38 constitute a second sensing switch 30. The second baffle 32 drives the end of the second movable lever 36 to contact and connect with the second sensing switch 30 through the thrust spring 35. The second sensing switch 30 is connected to the PLC system. After the second sensing contact 39 and the second sensing spring 38 are in contact, the conditions for the PLC system to make a command action are provided.

[0048] The output end of the stop gauge 3 is provided with a second pusher 5 for pushing out unqualified silicon steel sheet products. The second pusher 5 includes a second cylinder 51 and a second pusher plate 52. The second cylinder 51 is mounted on the outside of the guide trough 1, and the second pusher plate 52 is mounted on the groove surface of the guide trough 1. The second pusher plate 52 is an inverted U-shaped structure, and the second cylinder 51 is in transmission connection with the second pusher plate 52. The U-shaped groove of the second pusher plate 52 is buckled on the guide trough 1. When unqualified products are detected, the second pusher plate 52 takes action after receiving the instruction of the PLC, and pushes the unqualified products into the waste bin.

[0049] As a preferred solution, in one embodiment, a second stop screw 301 is threadedly connected to the side plate of the second fixing plate 34, and the axis of the second stop screw 301 is coaxially arranged with the axis of the thrust spring 35. The distance between the second connecting portion and the side plate of the second fixing plate 34 is adjusted by screwing the second stop screw 301, thereby adjusting the height of the bottom of the second baffle 32 from the top of the guide trough 1.

[0050] As a preferred solution, in one embodiment, a second square shaft 302 is fixed to the top of the second baffle 32, and the second square shaft 302 is a square structure, so as to facilitate welding and fixing the second baffle 32, the second connecting portion, and the second movable lever 36. One side of the second square shaft 302 is fixedly connected to the second connecting portion, and the rear portion of the other side of the second square shaft 302 is fixedly connected to the second movable lever 36. The second baffle 32, the second connecting portion, and the second movable lever 36 can be an integrated structure with the second square shaft 302 to facilitate manufacturing, and can also be fixed by welding for simplicity.

[0051] Further, as a preferred solution, in one embodiment, a third stop screw 303 is threadedly connected to the front side plate of the second fixed lever 37, and the axis of the third stop screw 303 is arranged parallel to the axis of the thrust spring 35 and perpendicular to the second connection portion. By screwing the third stop screw 303, it can also be used to adjust the distance between the second connection portion and the side plate of the second fixed plate 34, thereby adjusting the height of the bottom of the second baffle 32 from the top of the guide trough 1. In addition, the end of the third stop screw 303 abuts against the second connection portion, which can limit the distance between the second connection portion and the side plate of the second fixed plate 34, so as to avoid excessive thrust of the thrust spring 35, which causes the second induction spring 38 installed at the end of the second movable lever 36 to be too far away from the second induction contact 39.

[0052] In this embodiment, the detection link of the stop gauge 3 is to determine whether the silicon steel sheet part product exceeds the lower difference requirement of the drawing. Its main structure is the same as that of the through gauge 2, and its principle is also the same, which will not be repeated again. However, compared with the through gauge 2, the installation position of the second movable stop lever 36 is selected to be installed on the reverse side of the second square shaft 302, and the spring with a limiting function is changed to a thrust spring 35. When the part size is lower than the lower difference, the thrust spring 35 pushes the second square shaft 302 to rotate clockwise, and the second induction spring 38 of the second movable stop lever 36 will contact the second induction contact 39 on the second fixed stop lever 37. The contact notifies the PLC through a signal that the thickness of the part exceeds the lower difference. The PLC controls the solenoid valve to make the second cylinder 51 installed behind the stop gauge 3 push the part from the side to move out of the guide trough 1 and enter the waste box.

[0053] During normal testing, when the silicon steel sheet parts product meets the lower difference requirements, the product will always touch the second baffle 32, causing the second baffle 32 to rotate slightly counterclockwise, or not rotate. In addition, under the outward push of the thrust spring 35, the second induction spring 38 and the second induction contact 39 are always in a non-contact state.

[0054] This solution is designed to solve the production link in which the silicon steel sheet parts composed of stacked rivets need to be pressed tightly during the stamping production of silicon steel sheets. After pressing, the thickness of all parts is also inspected. The parts will rotate the baffle to judge whether the size of the parts is qualified. It is direct, efficient and has no restrictions on the production cycle. The parts only need to pass under the baffle to complete the inspection. By magnifying the actual size of the parts to notify the contact points on the sensor, the displacement change of the contact is many times that of the parts. The size detection error of the parts can be well controlled within ±0.01. The detection accuracy is high, and the mechanism has a simple structure. As long as the silicon steel sheet parts pass through, they can be detected. The work efficiency is high. After the parts meet the accuracy requirements, the accuracy of the inspection can be guaranteed. The use of the through gauge 2 and the stop gauge 3 as a set respectively controls the upper and lower differences of the silicon steel sheet parts, and realizes the classification and detection of the parts, which can directly reflect the production problems and provide a basis for production adjustments.

[0055] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-efficiency and high-precision detection mechanism for silicon steel sheets, characterized in that: The invention comprises a material guide trough (1) and a through gauge (2), wherein the through gauge (2) is installed at the top of the material guide trough (1), and the through gauge (2) comprises a first induction switch (20), a first baffle (22), a reset spring (25) and a first movable lever (26), wherein the first baffle (22) is movably connected to the top of the material guide trough (1), the lowest end surface of the first baffle (22) is located at a thickness difference position of the product, and the first baffle (22) drives the end of the first movable lever (26) to contact and connect with the first induction switch (20) through the reset spring (25); The through gauge (2) further comprises a first bearing seat (21), a first fixing plate (24), and a first fixing lever (27). The first bearing seat (21) is provided with two bearing seats respectively installed on both sides of the material guide trough (1). The inner sides of the two first bearing seats (21) are rotatably connected to the first baffle plate (22) via a first rotating shaft (23). The outer side of the top of one of the first bearing seats (21) is fixedly connected to the first fixing plate (24), and the outer side of the top of the other first bearing seat (21) is fixedly connected to the first fixing lever (27). A first connecting portion is provided on one side of the first baffle plate (22) close to the first fixing plate (24). The first fixing plate (24) is an L-shaped structure. The reset tension spring (25) is connected to the first fixing plate (24). Between the first connecting portion and the side plate of the first fixed plate (24), the front part of the first baffle plate (22) close to the first fixed lever (27) is fixedly connected to the first movable lever (26); the end of the first movable lever (26) is provided with a first sensing spring (28); the top of the first fixed lever (27) is provided with a first sensing contact (29); the first sensing contact (29) is electrically connected to the first sensing spring (28); the first sensing contact (29) and the first sensing spring (28) constitute the first sensing switch (20); the distance from the top of the first movable lever (26) to the center of the first rotating shaft (23) is at least twice the distance from the lowest end surface of the first baffle plate (22) to the center of the first rotating shaft (23); A first stop screw (201) is threadedly connected to the side plate of the first fixing plate (24), and the axis of the first stop screw (201) is arranged parallel to the axis of the return tension spring (25); A first square shaft (202) is fixed to the top of the first baffle (22); the first square shaft (202) is a square structure; one side of the first square shaft (202) is fixedly connected to the first connecting portion; and the other side of the first square shaft (202) is fixedly connected to the first movable gear lever (26) at the front. The invention also comprises a stop gauge (3), wherein the stop gauge (3) is installed at the top of the material guide trough (1), and the stop gauge (3) comprises a second induction switch (30), a second baffle plate (32), a thrust spring (35) and a second movable lever (36), wherein the second baffle plate (32) is movably connected to the top of the material guide trough (1), the lowest end surface of the second baffle plate (32) is located at a lower thickness difference position of the product, and the second baffle plate (32) drives the end of the second movable lever (36) to contact and connect with the second induction switch (30) through the thrust spring (35).

2. A high-efficiency and high-precision detection mechanism for silicon steel sheets according to claim 1, characterized in that: The stop gauge (3) further comprises a second bearing seat (31), a second fixing plate (34), and a second fixing lever (37). The second bearing seat (31) is provided with two seats respectively mounted on both sides of the material guide trough (1). The inner sides of the two second bearing seats (31) are rotatably connected to the second baffle plate (32) via a second rotating shaft (33). The outer side of the top of one of the second bearing seats (31) is fixedly connected to the second fixing plate (34), and the outer side of the top of the other second bearing seat (31) is fixedly connected to the second fixing lever (37). A second connecting portion is provided on one side of the second baffle plate (32) close to the second fixing plate (34). The second fixing plate (34) is a U-shaped structure. The thrust spring (35) is connected to the second fixing plate (34). Between the second connecting portion and the rear side plate of the second fixed plate (34), the rear portion of one side of the second baffle plate (32) close to the second fixed lever (37) is fixedly connected to the second movable lever (36); a second sensing spring (38) is provided at the end of the second movable lever (36); a second sensing contact (39) is provided at the top of the second fixed lever (37); the second sensing contact (39) is electrically connected to the second sensing spring (38); the second sensing contact (39) and the second sensing spring (38) constitute the second sensing switch (30); and the distance from the top of the second movable lever (36) to the center of the second rotating shaft (33) is at least twice the distance from the lowest end surface of the second baffle plate (32) to the center of the second rotating shaft (33).

3. A high-efficiency and high-precision detection mechanism for silicon steel sheets according to claim 2, characterized in that: A second stop screw (301) is threadedly connected to the side plate of the second fixing plate (34), and the axis of the second stop screw (301) is coaxially arranged with the axis of the thrust spring (35).

4. A high-efficiency and high-precision detection mechanism for silicon steel sheets according to claim 2, characterized in that: A second square shaft (302) is fixed to the top of the second baffle (32); the second square shaft (302) is a square structure; one side of the second square shaft (302) is fixedly connected to the second connecting portion; and the rear portion of the other side of the second square shaft (302) is fixedly connected to the second movable gear lever (36).

5. The high-efficiency and high-precision detection mechanism for silicon steel sheets according to claim 2, characterized in that: A third stop screw (303) is threadedly connected to the front side plate of the second fixed lever (37), and the axis of the third stop screw (303) is arranged parallel to the axis of the thrust spring (35) and perpendicular to the second connection portion.

6. A high-efficiency and high-precision detection mechanism for silicon steel sheets according to claim 1, characterized in that: The output end of the through gauge (2) is provided with a first pushing device (4), the first pushing device (4) comprising a first cylinder (41) and a first pushing plate (42), the first cylinder (41) being mounted on the outside of the material guide trough (1), the first pushing plate (42) being mounted on the groove surface of the material guide trough (1), the first pushing plate (42) being an inverted U-shaped structure, and the first cylinder (41) being transmission-connected to the first pushing plate (42).

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