Batch screening device for nut production
By combining a conveyor, camera, and screening structure with image processing and motor drive, efficient screening of nuts is achieved, solving the problem of low screening efficiency in existing devices and improving production efficiency.
Patent Information
- Application Number
- CN202520326337.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-02-27
AI Technical Summary
Existing batch screening equipment for nut production is inefficient in detecting defective products and cannot effectively screen out defective products of larger or smaller sizes, resulting in an increase in the number of individual inspections and a reduction in production efficiency.
The system employs a combination of a conveyor, camera, cylinder, and screening structure. It uses image processing and feature extraction to determine the quality of nuts, controls the cylinder to push defective products into the screening box, and separates qualified and defective products through multiple layers of sieve plates. The screening structure is driven by a motor to improve screening efficiency.
This technology enables efficient screening of nuts, reduces the number of defective products tested, improves production efficiency, and ensures that only qualified products undergo subsequent testing.
Smart Images
Figure CN223847513U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to nut production with batch screening device technical field especially relates to a nut production with batch screening device. BACKGROUND
[0002] The nut is a kind of mechanical element used in cooperation with bolt or stud, its inside is equipped with threaded hole, and part of defective product needs to be screened out using batch screening device after nut production, to prevent defective product from affecting subsequent installation work.
[0003] Staff often find in the process of using the current nut production with batch screening device: currently, visual analysis detector is directly used to detect the nut produced one by one, and the nut with flaw is selected out to be rejected, and due to various reasons in nut production process, there can be large size or small size defective product, if not screening in advance, it will increase the number of one-by-one detection, and reduce production efficiency. UTILITY MODEL CONTENTS
[0004] The utility model aims at solving the shortcomings in prior art and provides a nut production with batch screening device.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a nut production with batch screening device, including conveying table, the conveying table is fixedly connected with gantry, the gantry is fixedly connected with camera, the conveying table is fixedly connected with cylinder, the piston rod of the cylinder is fixedly connected with push plate, one end of the conveying table is fixedly connected with collection box, the conveying table is provided with screening structure, the screening structure is mainly composed of screening box, the screening box is fixedly connected at one end of conveying table, two rotating shafts are rotatably connected in the screening box, the first screen plate is fixedly connected on one rotating shaft, the second screen plate is fixedly connected on one rotating shaft, two waste outlets are formed in the side of screening box, and qualified product outlet is formed in the screening box.
[0006] The effect achieved by the above components is that the conveying belt on the conveying table drives the nut forward, the nut moves to the front of the gantry, the camera collects images of the nut, the image preprocessing module performs grayscale processing on the image, converts the color image into a grayscale image using a weighted average method, performs filtering processing on the grayscale image to remove noise, enhances the image contrast using a histogram equalization method, the feature extraction module performs edge detection and shape feature extraction, judges whether the nut shape is normal according to these parameters, calculates the texture features of the thread using a gray level co-occurrence matrix method, performs template matching at different positions and scales to calculate the matching degree, compares the matching degree with a threshold to judge whether the nut is qualified, and displays the detection result of the nut on the screen, which can be saved to a database or a file, according to the detection result, a feedback signal is sent to the production control system, when unqualified products are detected, the control module controls the cylinder to start and drive the push plate to advance to push the unqualified nut, the worker puts the nuts produced in the screening box, the first sieve plate screens out the nuts larger than the qualified product size, and then the nuts are slid out through the waste outlet above, the qualified products and smaller size nuts fall onto the second sieve plate, the smaller size nuts fall below the second sieve plate, and the qualified products are slid down to the conveying table through the qualified product outlet, so that the detection system only needs to detect the qualified products with qualified size, thereby avoiding the situation that the production efficiency is reduced due to the increase in the number of detection due to the production of large or small size defective products in the nut production process.
[0007] Preferably, the screening box is fixedly connected with a guide plate, and one side of the screening box is fixedly connected with a waste box.
[0008] The effect achieved by the above components is that the guide plate can guide the nuts smaller than the qualified size to slide down to the waste box through the waste outlet, and the larger waste is collected and processed.
[0009] Preferably, one end of the rotating shaft is fixedly connected with a connecting rod, a round rod is slidably connected in the connecting rod, and a disc is fixedly connected to the round rod.
[0010] The effect achieved by the above components is that the rotating disc can drive the round rod to move in a circular motion, and then the connecting rod reciprocates, and then the screening box and the first sieve plate reciprocate, thereby improving the screening effect of the nuts.
[0011] Preferably, two first motors are fixedly connected to the screening box, and the output shafts of the first motors are fixedly connected with the discs.
[0012] The effect achieved by the above components is that the first motor is started, and the output shaft of the first motor can drive the disc to rotate, making the operation more convenient.
[0013] Preferably, the conveying table is provided with a limiting structure, mainly composed of two rotating shafts, both of which are rotatably connected to the conveying table, and a limiting rod is fixedly connected to the rotating shafts.
[0014] The two limiting rods can guide the nuts, so that the nuts are always located at the middle position of the conveying table, and the distance between the two limiting rods can be adjusted according to the size of the nuts, so that the nuts pass one by one, facilitating the detection.
[0015] Preferably, one end of the limiting rod is rotatably connected with a guide wheel.
[0016] The guide wheel can reduce the friction with the nuts and prevent affecting the forward movement of the nuts.
[0017] Preferably, a second motor is fixedly connected to the conveying table, a rotating rod is fixedly connected to the output shaft of the second motor, a gear is commonly fixedly connected to the rotating rod and one rotating shaft, and the two gears are meshed with each other.
[0018] The above component achieves the effect that when the second motor is started, the output shaft of the second motor drives the rotating rod to rotate, and under the action of the two gears, the rotating rod and one rotating shaft are synchronously and reversely rotated.
[0019] Preferably, a belt pulley is fixedly connected to the rotating rod and one rotating shaft, and a transmission belt is commonly sleeved on the two belt pulleys.
[0020] The above component achieves the effect that the rotation of the rotating rod drives one belt pulley to rotate, and under the action of the transmission belt, the two belt pulleys are synchronously rotated, and then the two rotating shafts are synchronously and reversely rotated, so that the adjustment operation is more convenient.
[0021] Compared with the prior art, the advantages and positive effects of the utility model are that, in the utility model, through setting the screening structure, the conveying belt on the conveying table drives the nut to advance, the nut moves to the front of the portal frame, the camera carries out image acquisition on the nut, the image preprocessing module carries out gray scale processing on the image, converts the color image into the gray scale image by adopting the weighted average method etc., carries out filtering processing on the gray scale image, removes the noise, adopts the histogram equalization method to enhance the image contrast, the feature extraction module carries out edge detection and shape feature extraction, judges whether the nut shape is normal according to these parameters, adopts the gray level co-occurrence matrix method to calculate the texture feature of the thread, carries out template matching under different positions and scales to calculate the matching degree, compares with the threshold value to judge whether it is qualified, displays the detection result of the nut on the screen, can save the result into the database or file, according to the detection result, sends the feedback signal to the production control system, when detecting the unqualified product, the control module controls the cylinder to start, drives the push plate to advance and pushes the unqualified nut to fall, the staff puts the nut in the production place into the screening box, after screening through the second screen plate and the first screen plate, the first screen plate screens out the nut larger than the qualified product specification, then slides out through the upper waste outlet, the qualified product and the smaller size fall to the second screen plate, the smaller size falls below the second screen plate, the qualified product slides down to the conveying table through the qualified product outlet through the second screen plate, so that the detection system only needs to detect the qualified product of the size, thereby avoiding that the defective product of the larger size or the smaller size may appear in the nut production process due to various reasons, if not screening in advance, the number of detection will be increased, and the production efficiency is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 A three-dimensional structure schematic diagram of the batch screening device for nut production is provided for the utility model;
[0023] Figure 2 A partial schematic diagram of the screening structure of the batch screening device for nut production is provided for the utility model;
[0024] Figure 3 A partial schematic diagram of the screening structure of the batch screening device for nut production is provided for the utility model;
[0025] Figure 4 A partial schematic diagram of the limiting structure of the batch screening device for nut production is provided for the utility model;
[0026] Figure 5 A flow chart of the batch screening device for nut production is provided for the utility model.
[0027] Legend: 1. Conveyor; 2. Gantry; 3. Camera; 4. Cylinder; 5. Push plate; 6. Collection box; 7. Screening structure; 71. Screening box; 72. First screen plate; 73. Second screen plate; 74. Waste outlet; 75. Qualified product outlet; 76. Waste bin; 77. Guide plate; 78. Rotating shaft; 79. Connecting rod; 710. Round rod; 711. First motor; 712. Disc; 8. Limiting structure; 81. Rotating shaft; 82. Limiting rod; 83. Guide wheel; 84. Rotating rod; 85. Gear; 86. Second motor; 87. Pulley; 88. Transmission belt. Detailed Implementation
[0028] Example 1, such as Figure 1 As shown, a batch screening device for nut production includes a conveyor table 1, a gantry frame 2 fixedly connected to the conveyor table 1, a camera 3 fixedly connected to the gantry frame 2, a cylinder 4 fixedly connected to the conveyor table 1, a push plate 5 fixedly connected to the piston rod of the cylinder 4, and a collection box 6 fixedly connected to one end of the conveyor table 1.
[0029] Reference Figure 2 and Figure 3The conveying table 1 is provided with a screening structure 7, the screening structure 7 is mainly composed of a screening box 71, the screening box 71 is fixedly connected to one end of the conveying table 1, two rotating shafts 78 are rotatably connected in the screening box 71, a first sieve plate 72 is fixedly connected to one rotating shaft 78, a second sieve plate 73 is fixedly connected to the other rotating shaft 78, two waste outlets 74 are formed in one side of the screening box 71, a qualified product outlet 75 is formed in the screening box 71, the conveying belt on the conveying table 1 drives the nuts to move forward, the nuts move to the front of the gantry 2, the camera 3 collects the image of the nut, the image preprocessing module performs grayscale processing on the image, converts the color image into a grayscale image by using a weighted average method, filters the grayscale image to remove noise, enhances the contrast of the image by using a histogram equalization method, the feature extraction module performs edge detection and shape feature extraction, judges whether the shape of the nut is normal according to these parameters, calculates the texture features of the thread by using a gray level co-occurrence matrix method, performs template matching at different positions and scales to calculate the matching degree, compares the matching degree with a threshold value to judge whether the nut is qualified, and displays the detection result of the nut on the screen, the result can be saved into a database or a file, according to the detection result, a feedback signal is sent to a production control system, when an unqualified product is detected, the control module controls the cylinder 4 to start and drive the push plate 5 to move forward to push the unqualified nut, the worker puts the nuts produced in the screening box 71, the nuts are screened by the second sieve plate 73 and the first sieve plate 72, the nuts larger than the qualified product are screened out by the first sieve plate 72 and then slide out through the waste outlet 74 above, the qualified products and the nuts of smaller sizes fall on the second sieve plate 73, the nuts of smaller sizes fall below the second sieve plate 73, the qualified products slide down through the qualified product outlet 75 and fall on the conveying table 1, so that the detection system only needs to detect the qualified products of qualified sizes, thereby avoiding the situation that the production efficiency is reduced due to the fact that the nuts of larger sizes or smaller sizes may be produced in the nut production process due to various reasons and the number of detection is increased if the nuts are not screened in advance, the screening box 71 is fixedly connected with a guide plate 77, the screening box 71 is fixedly connected with a waste box 76 on one side, the guide plate 77 can guide the nuts smaller than the qualified size to slide down to the waste box 76 through the waste outlet 74, so that the larger waste is collected and treated, one end of the rotating shaft 78 is fixedly connected with a connecting rod 79, a round rod 710 is slidingly connected in the connecting rod 79, a disc 712 is fixedly connected to the round rod 710, the disc 712 can drive the round rod 710 to make circular motion, so that the connecting rod 79 reciprocatingly rotates, so that the screening box 71 and the first sieve plate 72 reciprocatingly rotate, and the screening effect on the nuts is improved, the first motor 711 is fixedly connected to the disc 712, the output shaft of the first motor 711 is fixedly connected to the disc 712, the first motor 711 is started, the output shaft of the first motor 711 can drive the disc 712 to rotate, so that the operation is more convenient.
[0030] With reference to Figure 4 The conveying table 1 is provided with a limiting structure 8, which mainly comprises two rotating shafts 81. The two rotating shafts 81 are both rotationally connected to the conveying table 1. The rotating shaft 81 is fixedly connected with a limiting rod 82. The two limiting rods 82 can guide the nuts, so that the nuts are always located at the middle position of the conveying table 1. The distance between the two limiting rods 82 can be adjusted according to the size of the nut, so that the nuts pass one by one, which facilitates the detection. One end of the limiting rod 82 is rotationally connected with a guide wheel 83. The guide wheel 83 can reduce the friction with the nut, so as to prevent affecting the forward movement of the nut. The conveying table 1 is fixedly connected with a second motor 86. The output shaft of the second motor 86 is fixedly connected with a rotating rod 84. The rotating rod 84 is fixedly connected with a gear 85 on one of the rotating shafts 81. The two gears 85 are meshed with each other. The second motor 86 is started. The output shaft of the second motor 86 drives the rotating rod 84 to rotate. Under the action of the two gears 85, the rotating rod 84 and the one rotating shaft 81 synchronously and reversely rotate. The rotating rod 84 and the one rotating shaft 81 are both fixedly connected with a belt pulley 87. The two belt pulleys 87 are commonly sleeved with a transmission belt 88. The rotating rod 84 drives one belt pulley 87 to rotate. Under the action of the transmission belt 88, the two belt pulleys 87 synchronously rotate, so as to synchronously and reversely rotate the two rotating shafts 81, which makes the adjustment operation more convenient.
[0031] The working principle is that the conveying belt on the conveying table 1 drives the nut to move forward, the nut moves to the front of the gantry 2, the camera 3 collects the image of the nut, the image preprocessing module performs grayscale processing on the image, converts the color image into a grayscale image by using the weighted average method, etc., filters the grayscale image to remove noise, enhances the image contrast by using the histogram equalization method, the feature extraction module performs edge detection and shape feature extraction, judges whether the nut shape is normal according to these parameters, calculates the texture features of the thread by using the gray level co-occurrence matrix method, performs template matching at different positions and scales to calculate the matching degree, compares the matching degree with a threshold value to judge whether the nut is qualified, and displays the detection result of the nut on the screen. The result can be saved to a database or a file. According to the detection result, a feedback signal is sent to the production control system. When unqualified products are detected, the control module controls the cylinder 4 to start and drive the push plate 5 to move forward to push the unqualified nut down. The worker puts the nuts produced in the screening box 71. After screening through the second screen plate 73 and the first screen plate 72, the nuts larger than the qualified product size are screened out by the first screen plate 72, and then slide out through the waste outlet 74 above. The qualified products and smaller sizes fall onto the second screen plate 73, and the smaller sizes fall below the second screen plate 73. The qualified products slide down through the qualified product outlet 75 onto the conveying table 1, so that the detection system only needs to detect the qualified products of the qualified size, thereby avoiding the situation that due to various reasons in the nut production process, larger or smaller size defective products may be produced. If they are not screened out in advance, the number of detection will be increased, which will reduce the production efficiency. The guide plate 77 can guide the nuts smaller than the qualified size to slide down through the waste outlet 74 into the waste box 76, and collect and process the larger waste. Rotating the disc 712, the disc 712 can drive the circular rod 710 to move in a circular motion, thereby making the connecting rod 79 reciprocating rotate, and thereby making the screening box 71 and the first screen plate 72 reciprocating rotate, improving the screening effect of the nuts. Starting the first motor 711, the output shaft of the first motor 711 can drive the disc 712 to rotate, making the operation more convenient. The two limiting rods 82 can guide the nuts to always be located in the middle position of the conveying table 1, and the distance between the two limiting rods 82 can be adjusted according to the size of the nut, so that the nuts pass one by one, facilitating detection. The guide wheel 83 can reduce the friction between the guide wheel 83 and the nut, preventing affecting the forward movement of the nut. Starting the second motor 86, the output shaft of the second motor 86 drives the rotating rod 84 to rotate, and under the action of the two gears 85, the rotating rod 84 and the rotating shaft 81 are synchronously and reversely rotated. The rotation of the rotating rod 84 drives a belt pulley 87 to rotate, and the two belt pulleys 87 are synchronously rotated under the action of the transmission belt 88, thereby synchronously and reversely rotating the two rotating shafts 81, making the adjustment operation more convenient.
[0032] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and alteration of the above embodiments without departing from the technical content of the present application, according to the technical essence of the present application, still belong to the protection scope of the present application. In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be connected inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
Claims
1. A batch screening device for nut production, comprising a conveyor table (1), characterized in that: The conveying table (1) is fixedly connected with a portal frame (2), the portal frame (2) is fixedly connected with a camera (3), the conveying table (1) is fixedly connected with a cylinder (4), the piston rod of the cylinder (4) is fixedly connected with a push plate (5), one end of the conveying table (1) is fixedly connected with a collection box (6), the conveying table (1) is provided with a screening structure (7), the screening structure (7) is mainly composed of a screening box (71), the screening box (71) is fixedly connected to one end of the conveying table (1), two rotating shafts (78) are rotatably connected in the screening box (71), a first sieve plate (72) is fixedly connected to one of the rotating shafts (78), a second sieve plate (73) is fixedly connected to the other rotating shaft (78), two waste outlets (74) are formed in one side of the screening box (71), and a qualified product outlet (75) is formed in the screening box (71).
2. The batch screening device for nut production according to claim 1, characterized in that: The screening box (71) is fixedly connected with a guide plate (77), and the screening box (71) is fixedly connected with a waste box (76) on one side.
3. The batch screening device for nut production according to claim 2, characterized in that: One end of the rotating shaft (78) is fixedly connected with a connecting rod (79), a round rod (710) is slidably connected in the connecting rod (79), and a disc (712) is fixedly connected to the round rod (710).
4. The batch screening device for nut production according to claim 3, characterized in that: Two first motors (711) are fixedly connected to the screening box (71), and the output shaft of the first motor (711) is fixedly connected with the disc (712).
5. The batch screening device for nut production according to claim 4, characterized in that: The conveying table (1) is provided with a limiting structure (8), the limiting structure (8) is mainly composed of two rotating shafts (81), the two rotating shafts (81) are rotatably connected to the conveying table (1), and a limiting rod (82) is fixedly connected to the rotating shaft (81).
6. The batch screening device for nut production according to claim 5, characterized in that: One end of the limiting rod (82) is rotatably connected with a guide wheel (83).
7. The batch screening device for nut production according to claim 6, characterized in that: A second motor (86) is fixedly connected to the conveying table (1), a rotating rod (84) is fixedly connected to the output shaft of the second motor (86), a gear (85) is fixedly connected to the rotating rod (84) and one rotating shaft (81), and the two gears (85) are meshed with each other.
8. The batch screening device for nut production according to claim 7, characterized in that: The rotating rod (84) and one rotating shaft (81) are fixedly connected with a belt pulley (87), and a transmission belt (88) is commonly sleeved on the two belt pulleys (87).