CN110639843A - High-precision LED support material belt online detection punching system - Google Patents
High-precision LED support material belt online detection punching system Download PDFInfo
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- CN110639843A CN110639843A CN201911056198.4A CN201911056198A CN110639843A CN 110639843 A CN110639843 A CN 110639843A CN 201911056198 A CN201911056198 A CN 201911056198A CN 110639843 A CN110639843 A CN 110639843A
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- 239000000463 material Substances 0.000 title claims abstract description 119
- 238000001514 detection method Methods 0.000 title claims abstract description 62
- 238000004080 punching Methods 0.000 title claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims description 88
- 238000006073 displacement reaction Methods 0.000 claims description 52
- 238000005520 cutting process Methods 0.000 claims description 10
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- 238000000034 method Methods 0.000 description 9
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- 239000010959 steel Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour
- B07C5/3422—Sorting according to other particular properties according to optical properties, e.g. colour using video scanning devices, e.g. TV-cameras
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/02—Measures preceding sorting, e.g. arranging articles in a stream orientating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/36—Sorting apparatus characterised by the means used for distribution
- B07C5/361—Processing or control devices therefor, e.g. escort memory
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/002—Drive of the tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
Abstract
The invention discloses a high-precision LED support material belt online detection punching system which comprises a rack, a controller, a feeding unit, an online detection unit and a punching unit. Through setting up special light source subassembly for strong and weak light zone can not appear and produce the shadow on the LED support material area, ensures that the image that machine vision equipment was shot can accurately reflect the true state in LED support material area, thereby realizes the high accuracy and detects. The high-precision LED support material belt online detection punching system provided by the invention has the recognition precision of 0.02mm, can detect the LED support material belt with the unilateral size of 1.0mm of an LED support, and can achieve the defective product recognition rate of 100%.
Description
Technical Field
The invention belongs to the technical field of LED automatic production equipment, and particularly relates to a high-precision LED support material belt online detection punching system.
Background
The LED support is widely applied to manufacturing of the display screen backlight source, along with the development of domestic and foreign scientific and technical economy, the types, models and number models of the LED support are increasingly large, and the requirements on the external surface size parameters and the surface perfection are increasingly high. For the manufacturing enterprises of the LED bracket, the detection procedures of the appearance shape, the size and the surface defects of the product occupy an important position in the whole process flow, and occupy larger manpower, field and capital resources.
In the production process of the LED support, in order to accelerate the production speed, the LED supports cannot be produced one by one, a plurality of rows and a plurality of columns of conductive pins are firstly formed on the same metal sheet in a stamping mode, then the insulating seat and the conductive pins are embedded and formed together in an injection molding mode, so that the LED supports with a plurality of rows and a plurality of columns are manufactured, and the plate which is not cut off by the LED supports is called an LED support material belt.
One of the procedures of the LED support material belt processing process is to glue the corresponding area on the material belt, glue particles cannot appear on the bonding pad, glue can not be lacked in the area outside the bonding pad, the two conditions are met simultaneously, namely the qualified product is obtained, and otherwise the qualified product is a defective product. At present, the glue shortage detection of the LED support material belt in the prior art is generally a manual detection mode, and detection personnel with rich experience can rapidly judge the products on the belt or perform manual spot check after one process. The mode has the advantages of high labor intensity, low efficiency, poor precision and high probability of missed detection and false detection. The improvement of the overall quality of the product and the reduction of the production cost are influenced.
Disclosure of Invention
In order to solve the technical problems, the invention provides a high-precision online detection and punching system for an LED support material belt, which can perform non-contact, high-precision and high-efficiency online detection on the LED support material belt and can automatically punch defective products.
The technical scheme adopted for achieving the purpose of the invention is that the high-precision LED support material belt online detection punching system comprises a rack, a controller, a feeding unit, an online detection unit and a punching unit, wherein the feeding unit, the online detection unit and the punching unit are arranged on the rack, and the high-precision LED support material belt online detection punching system comprises:
the feeding unit is used for transferring the LED support material belt along a first direction;
the online detection unit comprises machine vision equipment and a light source assembly, the light source assembly comprises a surface light source and a coaxial light source, the surface light source and the coaxial light source are arranged at intervals, and the LED support material belt is positioned between the surface light source and the coaxial light source; the machine vision equipment is arranged on the rack, and the shooting range of the machine vision equipment covers the LED support material belt positioned between the surface light source and the coaxial light source;
the blanking unit comprises a first linear displacement mechanism, a second linear displacement mechanism and a blanking die, wherein:
the blanking die is connected with a movable part of the first linear displacement mechanism, and the blanking die is driven by the first linear displacement mechanism to move along a second direction perpendicular to the first direction;
the fixed part of the first linear displacement mechanism is connected with the movable part of the second linear displacement mechanism, and the first linear displacement mechanism and the blanking die are driven by the second linear displacement mechanism together to move along a third direction perpendicular to the first direction and the second direction;
the fixed part of the second linear displacement mechanism is arranged on the frame;
the controller is respectively electrically connected with the feeding unit, the machine vision equipment, the first linear displacement mechanism and the second linear displacement mechanism.
Preferably, the surface light source includes a flat plate-shaped LED array and a light splitting plate, and the flat plate-shaped LED array is packaged by the light splitting plate.
Preferably, the coaxial light source includes light emitting element, prism and light source support, light emitting element with the prism all install in on the light source support, the prism is located the limit portion of light source support, with form a shooting channel in the installation region of coaxial light source, machine vision equipment passes through it is right to shoot the LED support material area.
Preferably, the on-line detection unit further comprises a light source telescopic mechanism, the light source assembly is fixed on the light source telescopic mechanism, and the light source assembly is driven by the light source telescopic mechanism to move in a direction close to or far away from the LED support material belt.
Preferably, the blanking unit further includes a blanking bracket connected to the movable portion of the second linear displacement mechanism, and the first linear displacement mechanism is mounted to the blanking bracket.
Preferably, the blanking die includes a blanking head and a blanking lower die, the blanking lower die is fixed to the blanking bracket, and the blanking head is connected to the movable portion of the first linear displacement mechanism.
Preferably, the device further comprises a joint sensing unit, wherein the joint sensing unit is mounted on the rack; the connector sensing unit comprises a shifting rod and a microswitch, the middle part of the shifting rod is rotatably arranged on the rack to form a lever mechanism, the microswitch is arranged beside a resistance arm of the lever mechanism, and the microswitch is electrically connected with the controller;
the power arm of the lever mechanism is located beside the transferring area of the LED support material belt, and when the LED support material belt is abnormally transferred, the LED support material belt touches the power arm.
Preferably, the feeding unit is a roller feeder.
Preferably, the roller feeder comprises a feeding motor, a transmission mechanism, an upper feeding roller and a lower feeding roller, the feeding motor drives the upper feeding roller and the lower feeding roller to rotate through the transmission mechanism, and the LED support material belt is clamped and transferred through the upper feeding roller and the lower feeding roller.
Preferably, the roller feeder further comprises a pressing mechanism for adjusting the clamping force between the upper feeding roller and the lower feeding roller.
According to the technical scheme, the high-precision online detection and punching system for the LED support material belt integrally comprises a rack, a controller, a feeding unit, an online detection unit and a punching unit, wherein: the feeding unit is used for transferring the LED support material belt along a first direction to realize online processing; the online detection unit is used for detecting the LED support material belt on line, the online detection unit comprises machine vision equipment and a light source assembly, the light source assembly comprises surface light sources and coaxial light sources which are arranged at intervals, the LED support material belt penetrates through the area between the surface light sources and the coaxial light sources in the transfer process, the surface light sources are used for providing shooting backlight, the outline of the LED support material belt and the outline of a single LED support are convenient to identify, and the surface light sources utilize the principle of shadowless lamps to avoid shadow generation caused by strong and weak light areas on the LED support material belt; the light of the coaxial light source vertically irradiates the LED support material belt, and the coaxial light source is used for improving the brightness of a shooting area and improving the shooting definition; the machine vision equipment is aligned to the LED support material belt between the surface light source and the coaxial light source, and the shooting range of the machine vision equipment can cover the part of the LED support material belt and is used for shooting the image of the part of the illuminated LED support material belt. The blanking unit is used for cutting the defective products, and the blanking unit includes first straight line displacement mechanism, second straight line displacement mechanism and blanking mould, and the blanking mould passes through the drive of first straight line displacement mechanism to the planar direction in perpendicular to LED support material area cuts the defective products, and first straight line displacement mechanism and blanking mould are driven through second straight line displacement mechanism jointly for fix a position the defective products place and be listed. The controller controls all functional units of the whole system to coordinate, the picture shot by the machine vision equipment is transmitted to the controller, the controller judges whether the LED support material belt in the picture has a defective product or not, the number of lines and the number of columns where the defective product is located are located, the controller sends an instruction to the second linear displacement mechanism according to the position of the defective product, the blanking die is aligned to the defective product, and then the controller controls the first linear displacement mechanism to drive the blanking die to blank the defective product.
Compared with the prior art, the LED support material belt is detected on line by adopting the machine vision equipment and the controller, defective products in the LED support material belt can be identified efficiently and accurately, and the positions of the defective products are positioned efficiently and accurately. Through setting up special light source subassembly for strong and weak light zone can not appear and produce the shadow on the LED support material area, ensures that the image that machine vision equipment was shot can accurately reflect the true state in LED support material area, thereby realizes the high accuracy and detects. The high-precision LED support material belt online detection punching system provided by the invention has the recognition precision of 0.02mm, can detect the LED support material belt with the unilateral size of 1.0mm of an LED support, and can achieve the defective product recognition rate of 100%.
Drawings
Fig. 1 is a schematic structural diagram of an on-line detection and punching system for a high-precision LED support material belt in an embodiment of the present invention;
FIG. 2 is a schematic structural view of the feeding unit in FIG. 1;
FIG. 3A is a front view of the on-line detection unit of FIG. 1;
FIG. 3B is a side view of the in-line detection unit of FIG. 1;
fig. 4 is a schematic structural view of the blanking unit of fig. 1;
FIG. 5 is a schematic structural diagram of the joint sensing unit in FIG. 1;
description of reference numerals: 10-a frame; 20-a controller; 30-feeding unit, 31-feeding motor, 32-transmission mechanism, 33-upper feeding roller, 34-lower feeding roller and 35-pressing mechanism; 40-an online detection unit, 41-machine vision equipment; 42-light source component, 43-light source telescopic mechanism, 44-guide rail, 45-connecting plate, 46-surface light source and 47-coaxial light source; 50-a blanking unit, 51-a first linear displacement mechanism, 52-a second linear displacement mechanism, 53-a blanking head, 54-a blanking lower die and 55-a blanking support; 60-joint sensing unit, 61-deflector rod, 62-microswitch, 63-power arm, 64-resistance arm and 65-contact; 70-discharging machine; 80-a material receiving machine; 90-a material belt guide plate; 100-LED support material belt.
Detailed Description
In order to make the technical solution of the present invention more clearly understood by those skilled in the art, the technical solution of the present invention is described in detail below by way of specific embodiments with reference to the attached drawings.
In the embodiment of the invention, the high-precision LED support material belt online detection punching system is used for online detection of the LED support material belt after gluing and before bending, and detection and removal of defective products lacking glue. A feeding machine 70 and a receiving machine 80 are respectively arranged in front of and behind the system and are respectively used for automatically unwinding and winding the LED support material belt.
Referring to fig. 1, the system includes a frame 10, a controller 20, and a feeding unit 30, an on-line detecting unit 40, and a blanking unit 50 mounted on the frame 10, and the structure of each functional unit is described in detail below:
referring to fig. 1, a frame 10 is a mounting base of the overall system, and the frame 10 is made of a steel structure and has a size determined according to equipment mounted thereon.
The controller 20 can be a PLC, a single chip, a computer, etc., and a human-machine interface is required to be arranged on the controller 20 for convenient control. The controller 20 is electrically connected to the feeding unit 30, the machine vision device 41, the light source retracting mechanism 43, the first linear displacement mechanism 51, the second linear displacement mechanism 52 and the micro switch 62, respectively, to coordinate the operations of the respective components.
The feeding unit 30 is used for moving the LED support material tape 100 along a first direction. In this embodiment, the LED support material tape 100 is transported along a horizontal direction, i.e. the first direction is an X-axis direction. For convenient arrangement, the feeding unit 30 is disposed at the rear side of the rack 10, and the feeding unit 30 cooperates with the discharging machine 70 to jointly establish a certain tension, so as to facilitate the transfer of the LED support material strip 100. In this embodiment, the feeding unit 30 is a roller feeder.
Referring to fig. 2, the roller feeder includes a feeding motor 31, a transmission mechanism 32, an upper feeding roller 33 and a lower feeding roller 34, the feeding motor 31 drives the upper feeding roller 33 and the lower feeding roller 34 to rotate through the transmission mechanism 32, the LED support material belt 100 is clamped and moved through the upper feeding roller 33 and the lower feeding roller 34, and two upper feeding rollers 33 and two lower feeding rollers 34 are provided to ensure stable movement.
Specifically, the transmission mechanism 32 includes a belt transmission mechanism and a gear rotation mechanism, the torque output by the feeding motor 31 is transmitted to the gear rotation mechanism through the belt transmission mechanism, and the gear rotation mechanism includes an upper gear and a lower gear which are engaged with each other, wherein the upper gear and the upper feeding roller 33 rotate coaxially, and the lower gear and the lower feeding roller 34 rotate coaxially.
In a preferred embodiment, the roller feeder further includes a pressing mechanism 35, the pressing mechanism 35 uses a wire spring to press the upper feeding roller 33 and the lower feeding roller 34 by an elastic force, so that the upper feeding roller 33 and the lower feeding roller 34 are tightly attached to the LED support material belt 100 to prevent slipping during moving.
In order to ensure that the LED support material belt 100 is straight and stably passes through the transfer process, a material belt guide plate 90 is further arranged on the rack, the material belt guide plate 90 is two guide rails symmetrically arranged, and the LED support material belt 100 is tightly attached to the material belt guide plate 90 when being transferred.
Referring to fig. 3A and 3B, the online detection unit 40 includes a machine vision device 41 and a light source assembly for online capturing images of the LED support strip 100. For convenience of arrangement, the on-line detection unit 40 is disposed at the front side of the rack 10, i.e., the LED support strip 100 passes through the on-line detection unit 40 first and then passes through the feeding unit 30.
Referring to fig. 3B, the light source assembly includes a surface light source 46 and a coaxial light source 47, the surface light source 46 and the coaxial light source 47 are arranged at intervals, preferably in parallel, and the LED support tape 100 is located between the surface light source 46 and the coaxial light source 47. Specifically, the surface light source 46 is located above the LED support material belt 100, the coaxial light source 47 is located below the LED support material belt 100, and a distance between the surface light source 46 and the coaxial light source 47 is 5mm to 50mm, preferably 10mm to 30 mm.
Specifically, the surface light source 46 includes a flat-plate LED array and a light splitter, the flat-plate LED array is packaged by the light splitter, the width of the flat-plate LED array should be greater than the width of the LED support material tape 100, and the length of the flat-plate LED array should be greater than the shooting range of the machine vision device 41.
The coaxial light source 47 includes a light emitting element, a triple prism and a light source bracket, the light emitting element and the triple prism are both installed on the light source bracket, light emitted by the light emitting element is refracted by the triple prism to obtain a horizontal light beam, and the horizontal light beam vertically irradiates on the LED bracket material belt 100. The refraction of the light by the triple prism may also avoid a shooting channel of the machine vision device 41, specifically, the triple prism is located at an edge of the light source bracket to avoid a shooting channel without any blocking object in the installation area of the coaxial light source 47.
The machine vision device 41 is disposed on the frame 10 and aligned with the LED support strip 100 between the surface light source 46 and the coaxial light source 47, and the machine vision device 41 is preferably a CCD. In this embodiment, the machine vision device 41 is installed below the coaxial light source 47 and directly faces the LED support material tape 100, the shooting range of the machine vision device can cover the LED support material tape 100 located between the surface light source 46 and the coaxial light source 47, and the machine vision device 41 shoots the LED support material tape 100 through the shooting channel.
Because in this system, the top and the below of LED support material area 100 all set up the light source, and the light source subassembly area is great, lacks operating space when the system need overhaul, for solving this problem, on-line measuring unit 40 still includes light source telescopic machanism 43 among this embodiment, and the light source subassembly is connected with the movable part of light source telescopic machanism 43, and the light source subassembly passes through the drive of light source telescopic machanism 43, moves along the third direction.
Specifically, the light source retracting mechanism 43 employs an air cylinder, and the air cylinder drives the light source assembly to move longitudinally along the horizontal direction, that is, the third direction is the Y-axis direction. Because the lighting effect of the light source assembly directly influences the detection precision of the system, the light source assembly is still located at the design position when being moved to the detection position, and the distance between the surface light source 46 and the coaxial light source 47 and the LED bracket material belt 100 is kept unchanged. In this embodiment, two high-precision linear guide rails are installed at corresponding positions of the rack 10, a connecting plate 45 is installed on a slider of each linear guide rail, and the surface light source 46 and the coaxial light source 47 are both installed on the connecting plate, so that the surface light source 46 and the coaxial light source 47 move together, and the relative positions of the surface light source 46 and the coaxial light source 47 are guaranteed to be unchanged.
Referring to fig. 4, the blanking unit 50 is used for blanking the defective products from the LED bracket material belt 100, and the blanking action is performed based on the detection result of the on-line detection unit 40, so that the blanking unit 50 is disposed behind the on-line detection unit 40, specifically, between the on-line detection unit 40 and the feeding unit 30.
Referring to fig. 4, the blanking unit 50 includes a first linear displacement mechanism 51, a second linear displacement mechanism 52, and a blanking die connected to a movable portion of the first linear displacement mechanism 51, the blanking die being driven by the first linear displacement mechanism 51 to move in a second direction perpendicular to the first direction; the fixed part of the first linear displacement mechanism 51 is connected with the movable part of the second linear displacement mechanism 52, and the first linear displacement mechanism 51 and the blanking die are driven together by the second linear displacement mechanism 52 to move along a third direction perpendicular to both the first direction and the second direction; the fixed portion of the second linear displacement mechanism 52 is mounted to the frame 10.
Specifically, in the present embodiment, the first linear displacement mechanism 51 employs an air cylinder to drive the blanking die to move in the vertical direction, that is, the second direction is the Z-axis direction. The second linear displacement mechanism 52 is a ball screw pair driven by a motor, a blanking bracket 55 is mounted on a nut of the ball screw pair, and an air cylinder is fixed on the blanking bracket 55.
Specifically, the blanking die comprises a blanking head 53 and a blanking lower die 54, the blanking lower die 54 is fixed on a blanking support 55 in a hanging manner, and the blanking head 53 is connected with a piston of the cylinder. When the ball screw pair driven by the motor moves, the air cylinder, the blanking head 53, the blanking lower die 54 and the blanking support 55 move along the Y axis together, so that the blanking die reaches the row of the defective products, then the air cylinder acts to drive the blanking head 53 to punch downwards, and the blanking head 53 is matched with the blanking lower die 54 to punch the defective products.
Because the high-precision LED support material belt on-line detection punching system of the embodiment is used for carrying out continuous and on-line detection on the LED support material belt, continuous feeding is required. When the current LED support material belt coil is about to detect, the next LED support material belt coil needs to be uncoiled for feeding, and the problem of blockage of feeding easily occurs at the joint of two LED support material belts, so that the operation of the whole system is influenced.
For this reason, in this embodiment, the high-precision on-line detection and die-cutting system for LED rack material tapes further includes a joint sensing unit 60, where the joint sensing unit 60 is installed on the frame 10 and located at the foremost position of the frame, that is, the LED rack material tape 100 first passes through the joint sensing unit 60 and then enters the on-line detection unit 40, and the moving direction is shown by an arrow a in fig. 5.
Referring to fig. 5, the connector sensing unit 60 mainly includes two shift levers 61 and a micro switch 62, where the two shift levers 61 are symmetrically disposed on two sides of the transfer area of the LED support material tape 100 and are at a certain height from the LED support material tape 100, for example, the LED support material tape 100 is 0.2mm thick, the shift lever 61 is 0.1mm from the upper surface of the LED support material tape 100, and if the material tapes overlap, the overlapped material tapes cannot pass through the shift lever 61.
The middle part of the shift lever 61 is rotatably mounted on the frame 10 to form a lever mechanism, the microswitch 62 is arranged beside the resistance arm 64 of the lever mechanism, and the power arm 63 of the lever mechanism is positioned above the transferring surface of the LED support material belt 100. Under normal conditions, the LED support tape 100 does not touch the shift lever 61, and the shift lever 61 is in the normal position (position b in fig. 5). When the LED support material belt 100 is stacked or stacked, etc., and is abnormally transferred, the LED support material belt 100 in an abnormal position may touch the power arm 63 of the shift lever 61 singly or simultaneously, the shift lever 61 rotates around the fulcrum, and the power arm 63 touches the contact 65 of the micro switch 62 (position c in fig. 5).
The working process of the high-precision LED support material belt online detection punching system provided by the invention is as follows:
(1) the controller controls the feeding unit 30 to cooperate with the discharging machine 70, so that the LED support material belt 100 establishes a certain tension and is continuously transferred. The transferring process is intermittent transferring, that is, each transferring end distance of the LED support material tape 100 is stopped for a time t1, for example, 0.2s, 0.3s, generally not more than 0.5s, for the on-line detection unit 40 to perform detection and analysis.
(2) The online detection unit 40 performs detection and analysis by using the pause time, the machine vision device 41 shoots the image of the LED support material belt 100 and transmits the image to the controller 20, the controller 20 pre-stores a qualified product image matched with the size of the currently detected LED support material belt 100, and the controller 20 performs image comparison to determine whether the shot image has defective products and locate the number of lines and columns where the defective products are located.
(3) Based on the determined number of rows, the controller 20 controls the feeding unit 30 to move the LED support material tape 100 forward a distance such that the row of defective products is located just below the blanking unit 50, and the LED support material tape 100 stops for a time t2, for example, 0.3s, 0.5s, generally not more than 1s, for the blanking unit 50 to position and blank.
(4) The controller 20 controls the second linear displacement mechanism 52 to move the punching die to a position directly above the defective product based on the determined number of rows, and then the controller 20 controls the first linear displacement mechanism 51 to move downward, and the punching die punches out the defective product.
If the row has a plurality of defective products, the LED rack tape 100 is paused for nt2 seconds, where n is the number of defective products, and the punching unit 50 punches the plurality of defective products one by one.
Through the embodiment, the invention has the following beneficial effects or advantages:
according to the invention, the LED support material belt is detected on line by adopting the machine vision equipment and the controller, defective products in the LED support material belt can be identified with high efficiency and high precision, and the positions of the defective products are positioned with high efficiency and high precision. Through setting up special light source subassembly for strong and weak light zone can not appear and produce the shadow on the LED support material area, ensures that the image that machine vision equipment was shot can accurately reflect the true state in LED support material area, thereby realizes the high accuracy and detects. The high-precision LED support material belt online detection punching system provided by the invention has the recognition precision of 0.02mm, can detect the LED support material belt with the unilateral size of 1.0mm of an LED support, and can achieve the defective product recognition rate of 100%.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The utility model provides a die-cut system of high accuracy LED support material area on-line measuring which characterized in that: including frame, controller and install feeding unit, on-line measuring unit and blanking unit in the frame, wherein:
the feeding unit is used for transferring the LED support material belt along a first direction;
the online detection unit comprises machine vision equipment and a light source assembly, the light source assembly comprises a surface light source and a coaxial light source, the surface light source and the coaxial light source are arranged at intervals, and the LED support material belt is positioned between the surface light source and the coaxial light source; the machine vision equipment is arranged on the rack, and the shooting range of the machine vision equipment covers the LED support material belt positioned between the surface light source and the coaxial light source;
the blanking unit comprises a first linear displacement mechanism, a second linear displacement mechanism and a blanking die, wherein:
the blanking die is connected with a movable part of the first linear displacement mechanism, and the blanking die is driven by the first linear displacement mechanism to move along a second direction perpendicular to the first direction;
the fixed part of the first linear displacement mechanism is connected with the movable part of the second linear displacement mechanism, and the first linear displacement mechanism and the blanking die are driven by the second linear displacement mechanism together to move along a third direction perpendicular to the first direction and the second direction;
the fixed part of the second linear displacement mechanism is arranged on the frame;
the controller is respectively electrically connected with the feeding unit, the machine vision equipment, the first linear displacement mechanism and the second linear displacement mechanism.
2. The high-precision online detection and die cutting system for the LED bracket material belt according to claim 1, is characterized in that: the surface light source comprises a flat-plate-shaped LED array and a light splitting plate, and the flat-plate-shaped LED array is packaged through the light splitting plate.
3. The high-precision online detection and die cutting system for the LED bracket material belt according to claim 1, is characterized in that: the coaxial light source comprises a light-emitting element, a triangular prism and a light source support, the light-emitting element and the triangular prism are installed on the light source support, the triangular prism is located on the side portion of the light source support, a shooting channel is formed in the installation area of the coaxial light source, and the machine vision equipment shoots the LED support material belt through the shooting channel.
4. The high-precision LED support material belt online detection and die cutting system as claimed in any one of claims 1 to 3, wherein: the on-line detection unit further comprises a light source telescopic mechanism, the light source assembly is fixed on the light source telescopic mechanism, and the light source assembly is driven by the light source telescopic mechanism to move in the direction close to or far away from the LED support material belt.
5. The high-precision online detection and die cutting system for the LED bracket material belt according to claim 1, is characterized in that: the blanking unit further includes a blanking bracket connected with the movable portion of the second linear displacement mechanism, and the first linear displacement mechanism is mounted on the blanking bracket.
6. The high-precision LED support material belt online detection and punching system of claim 5, wherein: the blanking die comprises a blanking head and a blanking lower die, the blanking lower die is fixed on the blanking support, and the blanking head is connected with the movable part of the first linear displacement mechanism.
7. The high-precision online detection and die cutting system for the LED bracket material belt according to claim 1, is characterized in that: the connector induction unit is mounted on the rack; the connector sensing unit comprises a shifting rod and a microswitch, the middle part of the shifting rod is rotatably arranged on the rack to form a lever mechanism, the microswitch is arranged beside a resistance arm of the lever mechanism, and the microswitch is electrically connected with the controller;
the power arm of the lever mechanism is located beside the transferring area of the LED support material belt, and when the LED support material belt is abnormally transferred, the LED support material belt touches the power arm.
8. The high-precision online detection and die cutting system for the LED bracket material belt according to claim 1, is characterized in that: the feeding unit is a roller feeding machine.
9. The high-precision online detection and die-cutting system for the LED bracket material belt of claim 8, wherein: the roller feeder comprises a feeding motor, a transmission mechanism, an upper feeding roller and a lower feeding roller, the feeding motor drives the upper feeding roller and the lower feeding roller to rotate through the transmission mechanism, and the LED support material belt is clamped and transferred through the upper feeding roller and the lower feeding roller.
10. The high-precision online detection and die-cutting system for the LED bracket material belt of claim 9, wherein: the roller feeder also comprises a material pressing mechanism for adjusting the clamping force of the upper feeding roller and the lower feeding roller.
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| CN201911056198.4A CN110639843B (en) | 2019-10-31 | 2019-10-31 | High-precision LED support material strip online detection punching system |
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| CN201911056198.4A CN110639843B (en) | 2019-10-31 | 2019-10-31 | High-precision LED support material strip online detection punching system |
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