CN105478529A - Product surface quality on-line detecting system and method for full-automatic stamping production line - Google Patents
Product surface quality on-line detecting system and method for full-automatic stamping production line Download PDFInfo
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Abstract
The invention relates to a product surface quality on-line detecting system and method for a full-automatic stamping production line. The stamping production line comprises a plurality of work stations, wherein a feeding mechanical arm is arranged between twoadjacent work stations; image detection devices for detecting the surface quality of stamping products are arranged at positions, corresponding to the feeding mechanical arms, of the stamping production line; signal output ends of the image detectiondevices are connected to signal input ends of image processing devices; and signal output ends of the image processing devices are connected to signal input ends of PLCs (Programmable Logic Controllers). The product surface quality on-line detecting system for the full-automatic stamping production line ensures that products processed on all the work stations of the full-automatic production line can meet quality requirements. The product surface quality on-line detecting system is simple in structure and is convenient and practical. The product surface quality on-line detecting method for the full-automatic stamping production line is high in detection efficiency and high in detection accuracy. The product surface quality on-line detecting system and method for the full-automatic stamping production line are simple to operate and are convenient and practical.
Description
Technical field
The present invention is a kind of full-automatic stamping line products surface quality on-line detecting system and method, belongs to the innovative technology of full-automatic stamping line products surface quality on-line detecting system and method.
Background technology
Punch process is efficient as one, energy-conservation, and the processing method of high stock utilization is widely used in modern industry manufacture.The height of stamping technology level, determines the productivity of enterprise and the status in overall industry to a great extent.In current industrial production, the mechanization, the automaticity that improve punch process are overall development trends, numerical-control full-automatic stamping line is then the emphasis of punching press industry development, because stamping line automaticity determines a National Industrial level height.
Numerical-control full-automatic stamping line is the latest development of Forging equipment technology.The total development trend of current Forging equipment technology is: intellectuality, precise treatment, high-speed and high-efficiency, integrated, greenization.Forging equipment is just from mechanical automation---and electric automatization strides forward to electromechanical integration; From single plane automation to multimachine automatic stamping line and flexible production line development.The numerically controlled automatic production line formed based on multiple stage high-accuracy multi-station forcing press, tens of roads stamping procedure is integrated on a production line and carries out full-automatic operation, not only substantially increase production efficiency and product quality, and greatly reduce floor space and number of workers, there is the series of advantages such as high-intelligentization, high accuracy, high reliability, high efficiency, energy-conservation, material-saving, represent the latest development direction of Forging equipment, be widely used in the industries such as Modern Traffic transport, electronic information, Aero-Space, communication and household electrical appliances.Numerical-control full-automatic punching production line technology is the intersection of the multidisciplinary multi-field new and high technologies such as precision optical machinery, robot, Numeric Control Technology, modern measure sensing technology, automatic technology and integrated.
In punching production process, cause substandard products even waste product due to the various objective factor such as mismachining tolerance, mould damage.As: in drawing process, plate produces plastic deformation, and material is transferred and redistributes, inner stress and strain is very complicated, causing the state in drawing process to be difficult to accurate control, often there is wrinkling, the defect such as to break in surface quality, so that subsequent handling is difficult to continue or product rejection.Therefore, full-automatic stamping line implements on-line checkingi to stamping parts and also just becomes most important, also become the important indicator passing judgment on its automaticity.And in actual production process, for the detection of stamping parts, be domesticly also in simple artificial vision or the simple artificial vision mode that combines with machinery, optical instrument carries out the artificial stage inspected by random samples to product.Facts have proved, due to the restriction of the aspect such as accuracy of detection and detection speed, Traditional Man detection method is difficult to the on-line checkingi of competent stamping parts product, the problems such as testing result is unreliable because traditional manual detection means exist, detection efficiency low, cannot accomplish digital integration, and bad adaptability, testing cost are high.So the automatic technology that research realizes product defects detection is of great significance for the automaticity tool improving stamping line.
Detection method based on image procossing can quick obtaining bulk information, can automatically process, can same design information, and machining control signal is integrated.Therefore, in automated production process, image detecting technique is widely used in the fields such as field monitor, product inspection and quality control by people, thus reaches the flexibility and automaticity that improve and produce.Compared with traditional detection means, the non-contact measurement of image procossing reduces hand labor intensity, improves production efficiency, and overcomes the drawback that testing process is separated with production process, especially as the airtight processing environment of Digit Control Machine Tool one class, non-contact measurement more seems and is even more important.Image detects a kind of effective means as non-contact detection, the requirement meet modern industry on-line checkingi, controlling in real time.Image detecting technique has unique superiority compared with traditional detection method, is not only applicable to Static Detection, is also applicable to detection of dynamic; By selecting the focal length that suitable camera adjusting is suitable, under certain outer conditions, greatly extend detection range, flexibility is improved; Image detecting technique is theoretical foundation with digital image processing techniques, have employed information content very abundant " image " as detected object, makes it detectability and greatly improve.Modern image detection technique is based on optical theory, merge the multiple technologies such as photoelectric technology, computer technology, information processing, become the focus that more and more people pays close attention to, the many merits such as its high accuracy, high stability, high efficiency, determine the direct impact that its development level develops industrial manufacturing industry.Therefore, the stamping parts defect detecting technique studied based on image procossing is also that tool is of great significance.
The defects detection operation of existing full-automatic stamping line products surface quality, carry out after being generally arranged on last station of finished product, if the defect of detecting, be difficult to reflect the station of makeing mistakes in multistation production timely, the finishing for each technological parameter does not have directive function.
Summary of the invention
The object of the invention is to consider the problems referred to above and a kind of full-automatic stamping line products surface quality on-line detecting system that the processing of all stations on automatic production line can reach quality requirement that ensures is provided.Structure of the present invention is simple, convenient and practical.
Not only detection efficiency is high to another object of the present invention is to provide one, and the full-automatic stamping line products surface quality online test method that accuracy of detection is high.
Technical scheme of the present invention is: full-automatic stamping line products surface quality on-line detecting system of the present invention, described stamping line includes some stations, feeder mechanical arm is provided with between adjacent stations, stamping line is provided with in the position of corresponding feeder mechanical arm the image detection device detected pressed part surface quality, the signal output part of image detection device is connected with the signal input part of image processing apparatus, and the signal output part of image processing apparatus is connected with the signal input part of PLC.
The detection method of the present invention's full-automatic stamping line products surface quality on-line detecting system, comprises the steps:
1) adopt the local surfaces image of pressed part on image detection device synchronous acquisition stamping line, and the image detected is delivered to image processing apparatus;
2) image processing apparatus uses wavelet filtering to strengthen algorithm, the image gathered is carried out to denoising, strengthens process, improves picture quality, gets rid of environmental factor interference;
3) image processing apparatus adopts the image that the adaptive threshold split plot design segmentation of wavelet conversion gathers, and extracts the easy defect part image that occurs and carries out subsequent treatment, reduce information operation amount, improve operation efficiency;
4) image processing apparatus uses boundary characteristic method and standard picture to carry out registration, defect characteristic and complex background characteristic area is separated;
5) whether image processing apparatus exists blemish according to standard picture examination pressed part:
51) if image processing apparatus analysis result mates with standard picture, there is not blemish in pressed part, then export analog electrical signal to PLC, controls image detection device and continue to gather image at the crawl beat of next station feeder mechanical arm;
52) if analysis result and standard picture exist the large feature of matching degree difference, then determine whether real defect, if not real defect, then export analog electrical signal to PLC, control image detection device and continue to gather image at the crawl beat of next station feeder mechanical arm; If real defect, then export analog electrical signal to PLC, stopping alarm; And adopt local form to extract to defect profile, and according to the defect profile extracted to classification of defects, according to classification of defects result, instruct revision and the Making mold of technological parameter.
Full-automatic stamping line products surface quality on-line detecting system of the present invention ensures that the processing of all stations on automatic production line can reach quality requirement.And structure is simple, convenient and practical.Not only detection efficiency is high for full-automatic stamping line products surface quality online test method of the present invention, and accuracy of detection is high.Full-automatic stamping line products surface quality on-line detecting system of the present invention and method simple to operate, convenient and practical.Present invention incorporates the material grasping track of feeder mechanical arm, effectively eliminate shaking interference problem.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the present invention's full-automatic stamping line products surface quality on-line detecting system;
Fig. 2 is the schematic diagram that the present invention utilizes beat synchronously to process;
Fig. 3 is the flow chart of online test method of the present invention.
Detailed description of the invention
Embodiment:
Structural representation of the present invention as shown in Figure 1, full-automatic stamping line products surface quality on-line detecting system of the present invention, described stamping line includes some stations, it is characterized in that between adjacent stations, being provided with feeder mechanical arm, stamping line is provided with in the position of corresponding feeder mechanical arm the image detection device detected pressed part surface quality, the signal output part of image detection device is connected with the signal input part of image processing apparatus, and the signal output part of image processing apparatus is connected with the signal input part of PLC.
The station defects detection method that the present invention's full-automatic stamping line products surface quality on-line detecting system adopts; on the end automatic punching line of multistation; the operation of one defect image detection is inserted between adjacent stations; if previous station detects defect; report to the police and shut down; and analyzing defect type, instruct the finishing to mould and technological parameter.On-line checkingi between this station, ensures that the processing of all stations on automatic production line can reach quality requirement.
In the present embodiment, above-mentioned image detection device is CCD industry camera.
In the present embodiment, above-mentioned CCD industry camera is positioned at the end of feeder mechanical arm by mechanical positioning mechanism.
In the present embodiment, above-mentioned CCD industry camera is positioned on the terminal-collecting machine of feeder mechanical arm end by mechanical positioning mechanism.Adopt such mechanism, the synchronized movement of video camera and mechanical arm can be made, the workpiece speed of related movement of CCD industry camera and shooting is zero, overcome because mechanical shaking and conveyer belt cause the fuzzy and light interference distortion problem of the surface image that collects between station, thus obtain image more clearly.
The detection method of the present invention's full-automatic stamping line products surface quality on-line detecting system, comprises the steps:
1) adopt the local surfaces image of pressed part on image detection device synchronous acquisition stamping line, and the image detected is delivered to image processing apparatus;
2) image processing apparatus uses wavelet filtering to strengthen algorithm, the image gathered is carried out to denoising, strengthens process, improves picture quality, gets rid of environmental factor interference;
3) image processing apparatus adopts the image that the adaptive threshold split plot design segmentation of wavelet conversion gathers, and extracts the easy defect part image that occurs and carries out subsequent treatment, reduce information operation amount, improve operation efficiency;
4) image processing apparatus uses boundary characteristic method and standard picture to carry out registration, defect characteristic and complex background characteristic area is separated;
5) whether image processing apparatus exists blemish according to standard picture examination pressed part:
51) if analysis result mates with standard picture, there is not blemish in pressed part, then export analog electrical signal to PLC, controls image detection device and continue to gather image at the crawl beat of next station feeder mechanical arm;
52) if analysis result and standard picture exist the large feature of matching degree difference, then determine whether real defect, if not real defect, then export analog electrical signal to PLC, control image detection device and continue to gather image at the crawl beat of next station feeder mechanical arm; If real defect, then export analog electrical signal to PLC, stopping alarm; and adopt local form to extract to defect profile; and according to the defect profile extracted to classification of defects, according to classification of defects result, instruct revision and the Making mold of technological parameter.In addition, PLC also sets alarm mode.
In the present embodiment, above-mentioned pressed part is stamping, and stamping can be the bool in stamping operation, or drawing part, or flange part, or bulging part etc.In the present embodiment, the drawing surface quality that the present invention be directed to drawing part detects, and the present invention also may be used on the surface quality detection of other operation goods, and just detection position is then different with evaluation criterion.
In the present embodiment, above-mentioned feeder mechanical arm comprise material grasping accelerate ascent stage, the constant speed transverse translation stage, and slow down the decline stage, image detection device be feeder mechanical arm the transverse translation stage synchronously carry out image detection and process.And according to testing result, if there is blemish, shut down adjustment, otherwise directly execution machine mechanical arm beat enters next station.This method utilizing beat synchronously to process of the present invention, both the time of image procossing can have been saved, improve detection efficiency, facilitate simultaneously and the technological parameter of each station is repaired, the image processing efficiency overcoming traditional images detection system is low, does not catch up with the problem of end automatic punching line productive temp.
In the present embodiment, when above-mentioned image detection device carries out IMAQ on the tact of motion point of feeder mechanical arm, feeder mechanical arm remains static.
In the present embodiment, the time that above-mentioned feeder mechanical arm remains static passes through programming Control by PLC.Which not only adds the flexibility of detection system, also avoid the shake because manipulator motion process occurs and the image deviations problem brought of light distortion, help better to gather surface of the work image.
Claims (10)
1. a full-automatic stamping line products surface quality on-line detecting system, described stamping line includes some stations, it is characterized in that between adjacent stations, being provided with feeder mechanical arm, stamping line is provided with in the position of corresponding feeder mechanical arm the image detection device detected pressed part surface quality, the signal output part of image detection device is connected with the signal input part of image processing apparatus, and the signal output part of image processing apparatus is connected with the signal input part of PLC.
2. full-automatic stamping line products surface quality on-line detecting system according to claim 1, is characterized in that above-mentioned image detection device is CCD industry camera.
3. full-automatic stamping line products surface quality on-line detecting system according to claim 1, is characterized in that above-mentioned CCD industry camera is positioned at the end of feeder mechanical arm by mechanical positioning mechanism.
4. full-automatic stamping line products surface quality on-line detecting system according to claim 1, is characterized in that above-mentioned CCD industry camera is positioned on the terminal-collecting machine of feeder mechanical arm end by mechanical positioning mechanism.
5. a detection method for full-automatic stamping line products surface quality on-line detecting system, is characterized in that comprising the steps:
1) adopt the local surfaces image of pressed part on image detection device synchronous acquisition stamping line, and the image detected is delivered to image processing apparatus;
2) image processing apparatus uses wavelet filtering to strengthen algorithm, the image gathered is carried out to denoising, strengthens process, improves picture quality, gets rid of environmental factor interference;
3) image processing apparatus adopts the image that the adaptive threshold split plot design segmentation of wavelet conversion gathers, and extracts the easy defect part image that occurs and carries out subsequent treatment, reduce information operation amount, improve operation efficiency;
4) image processing apparatus uses boundary characteristic method and standard picture to carry out registration, defect characteristic and complex background characteristic area is separated;
5) whether image processing apparatus exists blemish according to standard picture examination pressed part:
51) if image processing apparatus analysis result mates with standard picture, there is not blemish in pressed part, then export analog electrical signal to PLC, controls image detection device and continue to gather image at the crawl beat of next station feeder mechanical arm;
52) if analysis result and standard picture exist the large feature of matching degree difference, then determine whether real defect, if not real defect, then export analog electrical signal to PLC, control image detection device and continue to gather image at the crawl beat of next station feeder mechanical arm; If real defect, then export analog electrical signal to PLC, stopping alarm; And adopt local form to extract to defect profile, and according to the defect profile extracted to classification of defects, according to classification of defects result, instruct revision and the Making mold of technological parameter.
6. the detection method of full-automatic stamping line products surface quality on-line detecting system according to claim 5, is characterized in that above-mentioned image detection device is CCD industry camera.
7. the detection method of full-automatic stamping line products surface quality on-line detecting system according to claim 5, is characterized in that above-mentioned pressed part is stamping.
8. the detection method of full-automatic stamping line products surface quality on-line detecting system according to claim 6; it is characterized in that above-mentioned feeder mechanical arm comprises material grasping and accelerates ascent stage; the constant speed transverse translation stage; and slow down the decline stage; image detection device be feeder mechanical arm the transverse translation stage synchronously carry out image detection and process; and according to testing result, if there is blemish, shut down adjustment, otherwise directly execution machine mechanical arm beat enters next station.
9. the detection method of full-automatic stamping line products surface quality on-line detecting system according to claim 8, when it is characterized in that above-mentioned image detection device carries out IMAQ on the tact of motion point of feeder mechanical arm, feeder mechanical arm is in relative static conditions.
10. the detection method of full-automatic stamping line products surface quality on-line detecting system according to claim 9, is characterized in that the time that above-mentioned feeder mechanical arm is in relative static conditions is controlled by PLC.
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| CN110806736A (en) * | 2019-11-19 | 2020-02-18 | 北京工业大学 | Method for detecting quality information of forge pieces of die forging forming intelligent manufacturing production line |
| CN111578054A (en) * | 2020-04-18 | 2020-08-25 | 青岛奥利普自动化控制系统有限公司 | Production line quality tracking equipment and method |
| CN112474877A (en) * | 2020-11-06 | 2021-03-12 | 苏州宣佑科技有限公司 | Detection method for stamping |
| CN115027087A (en) * | 2022-08-09 | 2022-09-09 | 江苏艾卡森智能科技有限公司 | Quality analysis system for motor magnetic shoe stamping process |
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