CN116374683A - Conveying device and surface defect detection device - Google Patents
Conveying device and surface defect detection device Download PDFInfo
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- CN116374683A CN116374683A CN202310554208.7A CN202310554208A CN116374683A CN 116374683 A CN116374683 A CN 116374683A CN 202310554208 A CN202310554208 A CN 202310554208A CN 116374683 A CN116374683 A CN 116374683A
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- 230000007547 defect Effects 0.000 title claims abstract description 25
- 238000001514 detection method Methods 0.000 title claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims description 59
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 description 12
- 238000001179 sorption measurement Methods 0.000 description 11
- 230000009471 action Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H5/00—Feeding articles separated from piles; Feeding articles to machines
- B65H5/22—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device
- B65H5/222—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device by suction devices
- B65H5/224—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device by suction devices by suction belts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H5/00—Feeding articles separated from piles; Feeding articles to machines
- B65H5/22—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device
- B65H5/228—Feeding articles separated from piles; Feeding articles to machines by air-blast or suction device by air-blast devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
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Abstract
The application discloses conveyor and surface defect detection device belongs to flexible sheet conveying equipment technical field. The conveying device adsorbs smoothly to the lower surface of the flexible sheet through the first negative pressure body fixed below the first conveying belt so as to be convenient for detect the upper surface of the flexible sheet, adsorbs smoothly to the upper surface of the flexible sheet through the second negative pressure body fixed above the second conveying belt, and cooperates the second conveying belt to realize conveying of the flexible sheet, and simultaneously, the lower surface of the flexible sheet is detected conveniently. In addition, still through being located between first negative pressure body and the second negative pressure body, and fix the first negative pressure body of first conveyer belt below and adsorb flexible sheet lower surface, make flexible sheet can get into the clearance between first conveyer belt and the second conveyer belt, avoided the flexible sheet to roll up the circumstances that can't get into this clearance after the back. The flexible sheet is not required to be turned over in the whole conveying process, and meanwhile, crease marks or fracture damages caused by deformation of the flexible sheet are avoided.
Description
Technical Field
The application belongs to flexible sheet conveying equipment technical field, especially relates to a conveyor and surface defect detection device.
Background
In the PCB manufacturing process, surface defect detection is required to be carried out on flexible sheets such as a PP board, a copper foil board or a CCL board, so as to screen out defective products which reach the defect standard in the flexible sheets. For the surface defect detection of flexible sheets, most of them are done by means of a CCD camera.
The patent with the application number of 201822184722.3 discloses a double-sided visual detection device for workpieces, two conveyor belts are arranged, the workpieces are turned over by 180 degrees from one conveyor belt to the other conveyor belt by using a turning device, the surfaces and the side surfaces of the workpieces are detected by using a first CCD camera and a second CCD camera on a first conveyor belt, the back surfaces of the workpieces are detected by using a third CCD camera on a second conveyor belt, so that the surfaces of the workpieces can be detected in all directions by the aid of the device, the conveyor belts can work continuously, no pause is needed, and the production detection efficiency is improved.
However, when the flexible sheet is conveyed by this apparatus, the flexible sheet is easily creased or broken by deformation during the turning process, and the flexible sheet is detected as defective by the third CCD camera.
Disclosure of Invention
The technical problem that the overturning of the flexible sheet in the conveying of the flexible sheet by the conventional visual inspection device can cause crease or fracture damage of the flexible sheet due to deformation can be solved to at least a certain extent. To this end, the present application provides a conveyor and a surface defect detection system.
An embodiment of the present application provides a method for conveying flexible sheet material, comprising:
the first conveying mechanism is provided with a first conveying belt, and a first negative pressure body is fixed below the first conveying belt;
the second conveying mechanism is provided with a second conveying belt, a part of the second conveying belt is positioned right above the first conveying belt, a second negative pressure body is fixed above the second conveying belt, and at least a part of the second negative pressure body is positioned right above the first conveying belt; wherein,,
and a third negative pressure body is also fixed below the first conveying belt, is positioned between the first negative pressure body and the second negative pressure body along the conveying direction of the flexible sheet, and is closed when any flexible sheet enters below the second conveying belt.
Optionally, for better implementing the application, the first conveying mechanism and/or the second conveying mechanism is provided with a recognition device, the recognition device controls the start and stop of a third negative pressure body, and when the recognition device recognizes that the flexible sheet material enters the lower part of the second conveying belt, the third negative pressure body is closed.
Alternatively, for better realising the present application, the identification means are located between the second negative pressure body and the third negative pressure body in the conveying direction of the flexible sheet.
Optionally, for better implementing the present application, the second conveying mechanism is provided with a guide member, where the guide member has a guide surface, a front end of the guide surface is located directly above the third negative pressure body, and a tail end of the guide surface is abutted with the second conveying belt or a tail end of the guide surface is disposed below the second conveying belt.
Alternatively, for better implementation of the present application, the guide surface includes a first guide surface and a second guide surface, a rear end of the first guide surface is connected to a front end of the second guide surface, the front end of the first guide surface is higher than the rear end of the first guide surface, and the second guide surface is parallel to the first conveyor belt.
Alternatively, for better implementing the present application, the distance between the first conveyor belt and the second conveyor belt may be adjustable.
Optionally, for better implementing the present application, the conveying device includes a frame, the first conveying mechanism is fixed on the frame, a first adjusting mechanism for adjusting the height of the second conveying mechanism is disposed on the frame, and the second conveying mechanism is fixed on the second adjusting mechanism.
Alternatively, for better implementing the present application, the distance between the third negative pressure body and the first conveyor belt may be adjustable.
Alternatively, for better implementing the present application, the third negative pressure body is supported on the lower surface of the first conveyor belt.
The surface defect detection device comprises the conveying device, a first camera and a second camera, wherein the first camera is arranged above the first conveying belt and faces the first negative pressure body, and the second camera is arranged below the second conveying belt and faces the second negative pressure body.
Compared with the prior art, the application has the following beneficial effects:
this application adsorbs flexible sheet lower surface through the first negative pressure body of fixing in first conveyer belt below to level flexible sheet, so as to detect flexible sheet's upper surface, and adsorb flexible sheet upper surface through the second negative pressure body of fixing in second conveyer belt top, and cooperate the second conveyer belt to realize carrying flexible sheet, simultaneously, also can be convenient detect flexible sheet's lower surface. In addition, still through being located between first negative pressure body and the second negative pressure body, and fix the first negative pressure body of first conveyer belt below and adsorb the flexible sheet lower surface and level, make flexible sheet can be smooth get into the clearance between first conveyer belt and the second conveyer belt, avoided the flexible sheet turn-up after causing the condition that can't get into this clearance. The flexible sheet is not required to be turned over in the whole conveying process, and meanwhile, crease marks or fracture damages caused by deformation of the flexible sheet are avoided.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of a surface defect inspection apparatus;
fig. 2 shows a front view of fig. 1;
FIG. 3 is a schematic view showing the conveyor structure and the position of the camera of FIG. 1;
fig. 4 shows a schematic perspective view of the conveyor of fig. 1;
FIG. 5 shows a partial enlarged view at A of FIG. 3;
FIG. 6 is a schematic view showing an installation position of the first negative pressure body, the second negative pressure body and the third negative pressure body in FIG. 3;
fig. 7 is a schematic view showing a state of the flexible sheet after the third negative pressure body is closed in fig. 3.
Reference numerals:
100-a first conveying mechanism; 110-a first conveyor belt; 111-a first air hole; 120-a first drive mechanism; 130-a first negative pressure body; 140-a third negative pressure body; 141-identifying means;
200-a second conveying mechanism; 210-a second conveyor belt; 211-second air holes; 220-a second drive mechanism; 230-a second negative pressure body; 240-a guide; 241-first guide surface; 242-a second guide surface; 250-a second scaffold; 260-an adjustment assembly; 261-adjusting bolts; 262-cushion block;
300-frame;
400-a first camera;
500-a second camera.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all the directional indicators in the embodiments of the present invention are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indicators are correspondingly changed.
In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The present application is described below with reference to specific embodiments in conjunction with the accompanying drawings:
the conveying device provided in this embodiment is used for conveying flexible sheets, and can be used in the surface defect detecting device shown in fig. 1, so as to match with the first camera 400 and the second camera 500 in the surface defect detecting device in the process of conveying the flexible sheets, and the identification of the defects on the upper surface and the lower surface of the flexible sheets is completed in a manner of not turning over the flexible sheets.
Specifically, the conveying device in this embodiment, as shown in fig. 2, 3 and 4, includes a first conveying mechanism 100, a second conveying mechanism 200, a first negative pressure body 130 and a second negative pressure body 230.
The first conveying mechanism 100 includes a first conveying belt 110 and a first driving mechanism 120 for driving the first conveying belt 110 to move in a circulating manner, and the conveying structure of the first conveying mechanism 100 may be a pulley mechanism or a link plate mechanism. The conveying direction of the first conveying belt 110 is a straight line. The first conveyor belt 110 is provided with a first air hole 111, and the first air hole 111 can be a hole formed in a belt in the belt pulley mechanism or a hole formed in a chain plate in the chain plate mechanism. The flexible sheet moves in the conveying direction of the first conveying belt 110 by the conveying action of the first conveying belt 110. In this embodiment, the flexible sheet conveyed by the conveying device is a flexible sheet used by a PCB, so that the first conveying belt 110 in the first conveying mechanism 100 is horizontally arranged, so that the surface of the first conveying belt 110 bearing the flexible sheet is also in a horizontal state, and the situation that the flexible sheet is relatively offset between the first conveying belt 110 and the first conveying belt 110 in the conveying process of the first conveying belt 110 is reduced. Of course, it should be noted that, in some alternative embodiments, if the flexible sheet conveyed by the conveying device is heavy, the first conveying belt 110 may be disposed obliquely, and the friction between the flexible sheet and the first conveying belt 110 is used to reduce the relative offset between the flexible sheet and the first conveying belt 110 during the conveying process of the first conveying belt 110.
The first negative pressure body 130 is fixed below the first conveyor belt 110, specifically, the upper surface of the first negative pressure body 130 faces the first conveyor belt 110, the first negative pressure body 130 can generate negative pressure, and a first negative pressure area is formed on the upper surface of the first conveyor belt 110 after passing through the first air hole 111. The flexible sheet material can pass through the first negative pressure region under the conveying action of the first conveying belt 110, and the part of the flexible sheet material located in the first negative pressure region is attached to the upper surface of the first conveying belt 110 under the negative pressure action, so that the flexible sheet material is in a flat state at least in the first region, and the first camera 400 can conveniently photograph the upper surface of the flat flexible sheet material, so that the surface defects of the flexible sheet material can be identified and detected.
The second conveying mechanism 200 has a second conveying belt 210 and a second driving mechanism 220 that drives the second conveying belt 210 to circulate. In this embodiment, the second conveying mechanism 200 and the first conveying mechanism 100 both adopt the same conveying structure. A portion of the second conveyor belt 210 is positioned above the first conveyor belt 110 to engage the first conveyor belt 110, and the conveying direction of the second conveyor belt 210 is a straight line. The first conveyor belt 110 and the second conveyor belt 210 have a gap therebetween, which allows the flexible sheet to enter. The second conveyor belt 210 is provided with a second air hole 211, and the second conveyor belt 210 is horizontally disposed. The conveying direction of the flexible sheet on the first conveying belt 110 and the conveying direction of the flexible sheet on the second conveying belt 210 together constitute the conveying direction of the flexible sheet. In this embodiment, the conveying direction of the flexible sheet is a straight line direction, and in some other alternative embodiments, the conveying method of the flexible sheet may be a fold line direction, that is, the conveying direction of the first conveying belt 110 and the conveying direction of the second conveying belt 210 are not in the same straight line, for example, are perpendicular to each other in the same plane.
The second negative pressure body 230 is fixed above the first conveying belt 110, after the negative pressure generated by the second negative pressure body 230 passes through the second air hole 211, a second negative pressure area is formed on the lower surface of the second conveying belt 210, and the second negative pressure area at least covers the tail end of the first conveying belt 110, so that the flexible sheet on the first conveying belt 110 can enter the second negative pressure area when reaching the tail end of the first conveying belt 110, and the flexible sheet is adsorbed on the second conveying belt 210 under the action of the second negative pressure body 230 and separated from the first conveying belt 110, so that the transition of the flexible sheet from the first conveying belt 110 to the second conveying belt 210 is realized, and then the flexible sheet moves along the conveying direction of the second conveying belt 210 under the combined action of the second conveying belt 210 and the second negative pressure body 230, so that the conveying of the flexible sheet on the second conveying belt 210 is completed. After the second negative pressure body 230 adsorbs the flexible sheet to the second conveying belt 210, the flexible sheet can be attached to the second conveying belt 210 smoothly under the action of the second negative pressure body 230, so that the second camera 400 photographs the lower surface of the smooth flexible sheet, and therefore the surface defects of the flexible sheet are identified and detected.
Through the first conveying mechanism 100, the second conveying mechanism 200, the first negative pressure body 130 and the second negative pressure body 230, the flexible sheet can be conveyed, and meanwhile, the first camera 400 and the second camera 500 are matched to finish the defect detection on the upper surface and the lower surface of the flexible sheet.
The inventor found that when the flexible sheet is conveyed by the above-mentioned conveying device, if the interval between the first negative pressure body 130 and the second negative pressure body 230 is far, the flexible sheet will not enter the second negative pressure area formed by the second negative pressure body 230 immediately after passing through the first negative pressure area formed by the first negative pressure body 130, so that part of the flexible sheet having curled edges may be restored to the curled edges after leaving the first negative pressure area, and the shape edge of the flexible sheet may be changed due to curling, so that the flexible sheet may not pass through the gap between the first conveying belt 110 and the second conveying belt 210, and may not be transferred from the first conveying belt 110 to the second conveying belt 210, thereby affecting the normal operation of the whole conveying device. Meanwhile, after the curled flexible sheet is absorbed on the second conveyor belt 210 by the second negative pressure body 230, the flexible sheet cannot be laid on the second conveyor belt 210 due to the curled portion, thereby resulting in subsequent detection of defects on the lower surface of the flexible sheet. In addition, if the interval between the first negative pressure body 130 and the second negative pressure body 230 is set to be relatively close, the flexible sheet can immediately enter the second negative pressure area after leaving the first negative pressure area, so that the above problem caused by curling of the flexible sheet can be avoided, but the flexible sheet is suddenly deformed in the process of transiting from the first conveyor belt 110 to the second conveyor belt 210, so that stress concentration of the flexible sheet is caused, a crease which cannot be eliminated occurs on the surface of the flexible sheet, and the flexible sheet is broken more seriously, so that the flexible sheet becomes a defective product due to the crease or the breakage.
In addition, since the first negative pressure body 130 needs to planarize the flexible sheet for the camera to photograph the upper surface of the flexible sheet, and the second negative pressure body 230 needs to planarize the flexible sheet for the camera to photograph the lower surface of the flexible sheet, the first negative pressure body 130 and the second negative pressure body 230 cannot be closed during the use of the conveying device.
In view of this, referring to fig. 3 and 5, the structure of the conveying apparatus provided in this embodiment further includes a third negative pressure body 140, where the third negative pressure body 140 is fixed below the first conveying belt 110, specifically, the upper surface of the third negative pressure body 140 faces the first conveying belt 110, and the third negative pressure body 140 can generate negative pressure, and after passing through the first air hole 111, a third negative pressure area is formed on the upper surface of the first conveying belt 110. The flexible sheet material passes through the third negative pressure region under the conveying action of the first conveying belt 110, and the part of the flexible sheet material located in the third negative pressure region is attached to the upper surface of the first conveying belt 110 under the negative pressure action. The third negative pressure body 140 is located between the first negative pressure body 130 and the second negative pressure body 230 along the conveying direction of the flexible sheet, so that the third negative pressure region is located between the first negative pressure region and the second negative pressure region, and the flexible sheet sequentially enters the first negative pressure region, the third negative pressure region and the second negative pressure region during moving along the conveying direction. The third negative pressure region and the first negative pressure region may be spaced apart from each other or may partially overlap with each other.
The third negative pressure body 140 is a negative pressure body that is intermittently opened and closed, that is, the opening and closing of the third negative pressure body 140 are controllable. When the third negative pressure body 140 is closed, the third negative pressure body 140 does not generate an adsorption force on the upper surface of the first conveyor belt 110, and when the third negative pressure body 140 is opened, the third negative pressure body 140 generates an adsorption force on the upper surface of the first conveyor belt 110. The third negative pressure body 140 may be manually controlled to be opened or closed, or may be set in accordance with the conveyance timing of the flexible sheet. In this embodiment, the third negative pressure body 140 is closed when a flexible sheet enters under the second conveyor belt 210, and the third negative pressure body 140 is closed until the flexible sheet passes through the third negative pressure area formed by the third negative pressure body 140, so that the third negative pressure body 140 can be opened to allow the next flexible sheet to enter the third negative pressure area. To satisfy this opening and closing condition, it is necessary to make the distance between adjacent two flexible sheets on the first conveyor belt 110 larger than the length of the third negative pressure body 140 in the flexible sheet conveying direction, and on the other hand, it is necessary to make the distance between adjacent two flexible sheets on the first conveyor belt 110 larger than the coverage length of the third negative pressure region along the conveying method.
By providing the third negative pressure body 140 between the first negative pressure body 130 and the second negative pressure body 230, a larger distance between the first negative pressure body 130 and the second negative pressure body 230 can be ensured, and at the same time, the third negative pressure body 140 and the second negative pressure body 230 can be kept at a smaller distance. In this way, when the flexible sheet is conveyed on the conveying device, the flexible sheet firstly passes through the first negative pressure body 130 and the first negative pressure area formed by the first negative pressure body 130, the defect detection on the upper surface of the flexible sheet is completed by matching with the camera, then the flexible sheet enters the third negative pressure area formed by the third negative pressure body 140, at this time, the third negative pressure body 140 is already opened, the curled part of the flexible sheet is attached to the first conveying belt 110 under the action of the third negative pressure body 140, so that the flexible sheet can smoothly enter the gap between the first conveying belt 110 and the second conveying belt 210, the third negative pressure body 140 is closed while the flexible sheet enters the gap between the first conveying belt 110 and the second conveying belt 210, then the flexible sheet is subjected to the adsorption force of the second negative pressure body 230, so that one end of the flexible sheet is adsorbed on the second conveying belt 210, and the other end of the flexible sheet naturally sags under the action of gravity because the adsorption force of the third negative pressure body 140 is not received any more, and if the flexible sheet is long enough, the other end of the flexible sheet can still be overlapped on the first conveying belt 110. Because the first negative pressure body 130 and the second negative pressure body 230 have enough spacing, the flexible sheet can be gently transited from the first conveyor belt 110 to the second conveyor belt 210, the bending angle of the flexible sheet is smaller, the problem that the flexible sheet is simultaneously subjected to downward adsorption force of the third negative pressure body 140 and upward adsorption force of the second negative pressure body 230, and the spacing between the third negative pressure body 140 and the second negative pressure body 230 is too small, so that the bending angle of the flexible sheet is larger, and the flexible sheet is suddenly deformed to cause crease or fracture is avoided.
Further, in the present embodiment, the opening and closing of the third negative pressure body 140 are identified and controlled by the identification device 141, specifically, the identification device 141 is disposed on the first conveying mechanism 100 and/or the second conveying mechanism 200, and the identification device 141 is electrically connected to the electromagnetic valve or the negative pressure pump corresponding to the third negative pressure body 140, so that the identification device 141 can control the opening and closing of the third negative pressure body 140. Specifically, when the identification device 141 identifies that the flexible sheet has arrived below the second conveyor belt 210, that is, when the flexible sheet has entered the gap between the first conveyor belt 110 and the second conveyor belt 210, the identification device 141 controls the third negative pressure body 140 to be turned off, and when the identification device 141 does not identify the flexible sheet, the identification device 141 controls the third negative pressure body 140 to be turned on.
The identification device 141 in this embodiment is a photoelectric sensor and a controller. The photoelectric sensor is connected with a controller, and the controller is electrically connected with the solenoid valve or the negative pressure pump of the third negative pressure body 140 to identify the flexible sheet material through the photoelectric sensor and control the start/stop of the third negative pressure body 140 by the controller. The identification device 141 constructed using a photosensor and a controller can be applied because the flexible sheet in the PCB is light in weight. Of course, the identification device 141 may be a combination of a piezoelectric sensor and a controller, or a combination of an ultrasonic sensor and a controller.
Further, in the present embodiment, the identification device 141 is located between the second negative pressure body 230 and the third negative pressure body 140 along the conveying direction of the flexible sheet, and the identification position of the identification device 141 is also located between the second negative pressure body 230 and the third negative pressure body 140, preferably, the identification position of the identification device 141 is located between the second negative pressure region and the third negative pressure region. When the identification device 141 identifies the flexible sheet, the flexible sheet does not necessarily reach the position of the third negative pressure body 140, nor the third negative pressure region of the third negative pressure body 140, thereby avoiding that the flexible sheet is simultaneously subjected to the adsorption forces of the third negative pressure body 140 and the second negative pressure body 230.
Further, as shown in fig. 3 and 5, the second conveying mechanism 200 is further provided with a guide 240, where the guide 240 has a guide surface, and the guide surface is located above the first conveying belt 110 and faces the first conveying belt 110. The positions of the front end and the rear end of the guide surface are set along the conveying direction of the flexible sheet, and the front end of the guide surface is located directly above the third negative pressure body 140, and the tail end of the guide surface is butted with the second conveying belt 210 or the tail end of the guide surface is set below the second conveying belt 210. The gap between the guide surface and the first conveyor belt 110 is for the flexible sheet to enter. After the guide 240 is provided, the flexible sheet can quickly enter the gap between the guide surface and the first conveyor belt 110 after receiving the suction force of the third negative pressure body 140, so that the flexible sheet can smoothly transition into the gap between the first conveyor belt 110 and the second conveyor belt 210, and the flexible sheet is prevented from entering after the edge of the third negative pressure body 140.
After the guide 240 is disposed, the third negative pressure body 140 may be disposed at a position between the first negative pressure body 130 and the third negative pressure body 140. If the guide 240 is not provided, the third negative pressure body 140 is provided so that at least a portion of the third negative pressure body 140 is located directly below the second conveyor belt 210, that is, at least a portion of the third adsorption area of the third negative pressure body 140 is located in the gap between the first conveyor belt 110 and the second conveyor belt 210.
Specifically, the surface of the guide member 240 includes a first guide surface 241 and a second guide surface 242, the first guide surface 241 and the second guide surface 242 are smooth planes, and the rear end of the first guide surface 241 is connected with the front end of the second guide surface 242 through an arc transition, so as to avoid increasing the curling angle of the flexible sheet at the corner between the first guide surface 241 and the second guide surface 242. The front end of the first guide surface 241 is higher than the rear end of the first guide surface 241, and the second guide surface 242 is parallel to the first conveyor belt 110.
Further, the distance between the guide 240 and the first conveyor belt 110 is adjustable, and flexible sheets with different thicknesses can be accommodated by adjusting the position of the guide 240. In the present embodiment, the guide 240 and the second conveying mechanism 200 achieve the height adjustment of the guide 240 by the cooperation of the waist-shaped groove and the bolt.
Further, the distance between the first conveyor belt 110 and the second conveyor belt 210 is adjustable. By adjusting the spacing between the first conveyor belt 110 and the second conveyor belt 210, on the one hand, flexible sheets of different thicknesses can be passed through the gap between the first conveyor belt 110 and the second conveyor belt 210; on the other hand, since the second negative pressure body 230 needs to adsorb the flexible sheet upward, the second negative pressure body 230 can also have a sufficient adsorption force to the flexible sheet by adjusting the distance between the first conveyor belt 110 and the second conveyor belt 210.
Further, in the present embodiment, the conveying device includes a frame 300, the first conveying mechanism 100 and the second conveying mechanism 200 are both fixed on the frame 300, a second adjusting mechanism for adjusting the height of the second conveying mechanism 200 is disposed on the frame 300, and the second conveying mechanism 200 is fixed on the second adjusting mechanism. The overall height of the second conveying mechanism 200 is adjusted by the second adjusting mechanism, so as to achieve the effect of adjusting the distance between the second conveying belt 210 and the first conveying belt 110.
Specifically, the second conveying mechanism 200 includes a second support 250, the second conveying belt 210 and the second driving mechanism 220 are both fixed on the second support 250, the first adjusting mechanism includes at least four adjusting assemblies 260, at least four adjusting assemblies 260 are symmetrically disposed on two sides of the second support 250, each adjusting assembly 260 includes an adjusting bolt 261 and a cushion block 262, the adjusting bolt 261 is disposed on the second support 250 in a penetrating manner, a threaded end of the adjusting bolt 261 is in threaded connection with the frame, and the cushion block 262 is detachably disposed between the second support 250 and the frame. The cushion block 262 has a plurality of different thicknesses, the cushion block 262 with different thicknesses is selected according to flexible sheets with different thicknesses, after the cushion block 262 is placed between the second bracket 250 and the frame, the cushion block 262 is clamped between the second bracket 250 and the frame by screwing the adjusting bolt 261, the adjustment of the whole height of the second conveying mechanism 200 is realized, the cushion block 262 can bear the whole weight of the second conveying mechanism 200, and the service life of the conveying device is prolonged. Of course, in some alternative embodiments, the second adjustment mechanism of other assemblies may be employed to effect adjustment of the overall height of the second conveyor mechanism 200, such as a shear lift assembly or a telescoping cylinder assembly, for example.
In this embodiment, the second negative pressure body 230 is connected to the second bracket 250 on which the second conveying mechanism 200 is mounted, so that the second negative pressure body 230 can move integrally with the second conveying belt 210.
Further, the distance between the third negative pressure body 140 and the first conveyor belt 110 is adjustable. By adjusting the gap between the third negative pressure body 140 and the first conveying belt 110, the effect of adjusting the amount of the suction force of the third negative pressure body 140 to the flexible sheet on the first conveying belt 110 can be achieved, when the distance between the third negative pressure body 140 and the first conveying belt 110 increases, the suction force of the third negative pressure body 140 to the flexible sheet entering the third negative pressure region decreases, and when the distance between the third negative pressure body 140 and the first conveying belt 110 decreases, the suction force of the third negative pressure body 140 to the flexible sheet entering the third negative pressure region increases.
Preferably, the third negative pressure body 140 is supported on the lower surface of the first conveyor belt 110, so that the third negative pressure body 140 is attached to the lower surface of the first conveyor belt 110. On the one hand, the loss of the adsorption force after the third negative pressure body 140 is started can be reduced, the adsorption effect on the flexible sheet is improved, and on the other hand, the third negative pressure body 140 can also play a role in supporting the first conveying belt 110, and the swing amplitude of the third conveying belt after loosening is reduced.
Based on the above conveying device, the embodiment of the present application further provides a surface defect detecting device, an implementation structure of the surface defect detecting device is shown in fig. 1 to 3, and the surface defect detecting device is used for detecting a surface defect of a flexible sheet, including the conveying device, a first camera 400 and a second camera 500, the conveying device is used for conveying the flexible sheet, and a first negative pressure body 130 in the conveying device is used for adsorbing the flexible sheet entering a first negative pressure area on a first conveying belt 110, so as to achieve the purpose of flattening the flexible sheet, a second negative pressure body 230 in the conveying device is used for adsorbing the flexible sheet on a second conveying belt 210, and is matched with the second conveying belt 210 to complete conveying of the flexible sheet, and meanwhile, the second negative pressure body 230 also plays a role of flattening the flexible sheet. The first camera 400 is disposed above the first conveyor belt 110 and faces the first negative pressure body 130, specifically, the first camera 400 faces the position of the first conveyor belt 110 corresponding to the first negative pressure body 130, photographs the flexible sheet absorbed by the first negative pressure body 130, and analyzes the photographed photograph by an image processor (not shown in the figure), and detects a surface defect of the upper surface of the flexible sheet. The second camera 500 is disposed below the second conveyor belt 210 and faces the second negative pressure body 230, specifically, the second camera 500 faces the position of the second conveyor belt 210 corresponding to the second negative pressure body 230, so as to photograph the lower surface of the flexible sheet, and the image processor detects the surface defect of the upper surface of the flexible sheet.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.
Claims (10)
1. A conveying apparatus for conveying a flexible sheet, comprising:
a first conveying mechanism (100), wherein the first conveying mechanism (100) is provided with a first conveying belt (110), and a first negative pressure body (130) is fixed below the first conveying belt (110);
a second conveying mechanism (200), wherein the second conveying mechanism (200) is provided with a second conveying belt (210), a part of the second conveying belt (210) is positioned right above the first conveying belt (110), a second negative pressure body (230) is fixed above the second conveying belt (210), and at least a part of the second negative pressure body (230) is positioned right above the first conveying belt (110); wherein,,
a third negative pressure body (140) is further fixed below the first conveying belt (110), the third negative pressure body (140) is located between the first negative pressure body (130) and the second negative pressure body (230) along the conveying direction of the flexible sheet, and when any flexible sheet enters below the second conveying belt (210), the third negative pressure body (140) is closed.
2. A conveyor device according to claim 1, characterized in that identification means (141) are provided on the first conveyor mechanism (100) and/or the second conveyor mechanism (200), the identification means (141) controlling the start and stop of a third negative pressure body (140), the third negative pressure body (140) being closed when the identification means (141) identify a flexible sheet entering under the second conveyor belt (210).
3. A conveying device according to claim 1, characterized in that the identification means (141) are located between the second negative pressure body (230) and the third negative pressure body (140) in the conveying direction of the flexible sheet.
4. A conveying device according to claim 1, characterized in that the second conveying mechanism (200) is provided with a guide (240), the guide (240) has a guide surface, the front end of the guide surface is located directly above the third negative pressure body (140), and the tail end of the guide surface is in abutment with the second conveying belt (210) or the tail end of the guide surface is located below the second conveying belt (210).
5. A conveyor device according to claim 4, characterized in that the guide surface comprises a first guide surface (241) and a second guide surface (242), the rear end of the first guide surface (241) being in contact with the front end of the second guide surface (242), the front end of the first guide surface (241) being higher than the rear end of the first guide surface (241), the second guide surface (242) being parallel to the first conveyor belt (110).
6. A conveyor according to claim 1, characterized in that the distance between the first conveyor belt (110) and the second conveyor belt (210) is adjustable.
7. A conveyor according to claim 6, characterized in that the conveyor comprises a frame (300), the first conveyor (100) being fixed to the frame (300), the frame (300) being provided with a first adjustment mechanism for adjusting the height of the second conveyor (200), the second conveyor (200) being fixed to the second adjustment mechanism.
8. A conveyor device according to claim 1, characterized in that the distance between the third negative pressure body (140) and the first conveyor belt (110) is adjustable.
9. A conveyor device according to claim 6, characterized in that the third negative pressure body (140) is supported on the lower surface of the first conveyor belt (110).
10. A surface defect detection device, characterized by comprising a conveyor according to any one of claims 1-9, and a first camera (400) and a second camera (500), the first camera (400) being arranged above the first conveyor belt (110) and facing the first negative pressure body (130), the second camera (500) being arranged below the second conveyor belt (210) and facing the second negative pressure body (230).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310554208.7A CN116374683A (en) | 2023-05-17 | 2023-05-17 | Conveying device and surface defect detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310554208.7A CN116374683A (en) | 2023-05-17 | 2023-05-17 | Conveying device and surface defect detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116374683A true CN116374683A (en) | 2023-07-04 |
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ID=86967695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310554208.7A Pending CN116374683A (en) | 2023-05-17 | 2023-05-17 | Conveying device and surface defect detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116374683A (en) |
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2023
- 2023-05-17 CN CN202310554208.7A patent/CN116374683A/en active Pending
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