CN86101203A - Untouched cold-rolled strip steel platelike tester - Google Patents
Untouched cold-rolled strip steel platelike tester Download PDFInfo
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- CN86101203A CN86101203A CN 86101203 CN86101203A CN86101203A CN 86101203 A CN86101203 A CN 86101203A CN 86101203 CN86101203 CN 86101203 CN 86101203 A CN86101203 A CN 86101203A CN 86101203 A CN86101203 A CN 86101203A
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Abstract
The present invention for cold-strip steel provide a kind of contactless, measuring accuracy is high, detecting instrument of flatness that can on-line quick detection.It is made up of vibrator, vibration-measuring sensor and plate shape measurement digital processing system.Use when of the present invention, it is installed on the endpiece of rolling mill for cold rolled steel strip, do not contact with the band steel, being with steel regularly to be added by vibrator shakes, and by the vibration signal of vialog by vibration transducer detection band steel, then the electric signal input digit disposal system that records is carried out data processing, and send display to demonstrate the flatness situation of band steel the result.
Description
The present invention is the detector in the pressure processing craft process.
Detecting instrument of flatness at present in the world some countries just under study for action, modern milling train is not all loaded onto detecting instrument of flatness.Still hold big wooden stick by workman's hand in the production and knock band steel dual-side, as judging whether the strip steel has the means of flatness defect.Existing a kind of detecting instrument of flatness was once tried out on milling train.For example reported a kind of measuring device for testing alignment among the metal digest 22-0848, it is that the guide roller that fitted together by a plurality of annulus is as detecting element, pressure transducer is housed in the ring, utilizes stressed the varying in size of each ring to judge the flatness defects that occurs on the strip width.Reported another kind of measuring device for testing alignment among the metal document 93-0258, it is the combination bending roll, utilizes the displacement of bending roll and the tension force funtcional relationship on the strip width, can determine the unflatness with steel.Above-mentioned two kinds of measuring device for testing alignment all belong to contact, must guarantee in the testing process that the band steel closely contacts with guide roller or bending roll.They have concomitant problem, i.e. touch roll complex structure, and the requirement on machining accuracy height, the signal demand slip ring just can be drawn, and the loose contact meeting of slip ring causes measurement result error to occur; During installation and the measuring roller Shi Douhui that breaks down influence the normal operation of milling train; Guide roller does not have convexity, can not be corrected automatically strip running deviation.
Narrated a kind of contactless strip profile and flatness measurement mechanism in the United States Patent (USP) 4309902.It is by detecting metal plate and belt in the operation of rolling and being installed in the variation of the relative distance between the detecting device of its near surface, try to achieve the speed that Oscillation Amplitude and vibration carry out or the ratio of frequency by the complicated analog device of a cover then, determine the defective of the flatness of band steel.Detect strip profile and flatness with this kind method, owing to a little less than the detected signal, be subject to disturb, thereby influence measuring accuracy, and instrument itself is complicated, adjusts difficulty, the cost height, and versatility is poor.
It is a kind of contactless that the object of the invention is to provide, measuring accuracy height, detecting instrument of flatness that can on-line quick detection.
Tension Distribution when the ultimate principle that the present invention detects the belt plate shape defective is based on the band steel and flatness defect occurs on the strip width direction is also inhomogeneous, and straight portion tension force is big, and the waviness partial tension is little.So, can detect the belt plate shape condition of poor by the Tension Distribution that detects on the strip width direction.
Composition of the present invention shown in figure one, comprise one not with the band the contacted vibrator of steel (1), several vibration-measuring sensors (2), plate shape measurement digital processing system (3).
Contactless vibrator is electromagnetic actuator as shown in Figure 2, is one " E " font iron core, is built up by siliconized plate, is wound with coil therebetween.It is installed on the fixed mount of band steel bottom, keeps certain distance with band steel lower surface.Manual regulating device is housed on the fixed mount, can regulates the distance between vibrator (1) and band steel according to actual needs at any time.This electromagnetic exciter is used for strengthening tested vibration signal.During vibrator (1) energized, produce electromagnetic force in the iron core and inhale moving steel plate, the deenergization electromagnetic force disappears, and the band steel just produces the free damping vibration.The vibrator power supply is controlled by electric wiring, makes it by certain cycle timing Power-On and deenergization, the mechanical vibration that make the band steel constantly produce fixed cycle property.
Vibration-measuring sensor (2) belongs to the electrodynamometer type type, and it changes the mechanical oscillation signal of band steel into electric weight, and its principle is to utilize the relative motion of coil and permanent-magnet steel, and cutting magnetic line produces the electric signal that is directly proportional with vibration velocity.Vibration-measuring sensor (2) is installed in broad ways disposed at equal distance below the band steel, and it leaves the distance of band steel lower surface and also can regulate arbitrarily.
Plate shape measurement digital processing system (3) is the main part of this instrument, is equipped with in it: six parts such as vibrator power supply and electric wiring thereof, vibration detection, microprocessor system and interface, spectrum analysis module, plate shape message processing module, flatness defect demonstration.Its course of work as shown in Figure 3.Vibrator power supply (14) is general SCR rectification circuit, is connected and is closed by electric wiring timing controlled controllable silicon, guarantees that vibrator has the fixing work period.Vibration detection (4) is the vibration measuring device of multichannel high-sensitive degree, and it can receive the vibration signal that a plurality of sensors are sent here simultaneously, and through secondary instrument amplification, differential, integral operation, just can record vibration signal, at last the signal multichannel is exported.Microprocessor system can adopt user memory to be not less than single card microcomputer or the micro computer of 20K, it should have high-speed a/d conversion equipment (5) and interface, and spectrum analysis module (6), (7), (8), (9), (10) and plate shape message processing module (11), (12), (13) of the special development of the present invention are housed.This microprocessor system is mainly used in high speed information collection and data processing.Can the selector channel number by keyboard, sampling period, spectrum analysis precision.The microprocessor system output signal send display to show, also can go out to be with the steel data by printer prints, rolling mill practice condition, and relevant data such as flatness defect.
Spectrum analysis module is the command system of microprocessor, and it comprises following a few part: 1. the digital signal that analog to digital conversion is come is carried out Filtering Processing (6), removes undesired signal; 2. by data window function (7) response signal of transient excitation is blocked; 3. carry out fast fourier (FFT) and calculate (8); 4. FFT result of calculation is carried out 3 smoothing processing (9); 5. adopt power spectrum method (10) to be with the steel calculation on Natural Frequency.
Plate shape message processing module is mainly finished the conversion of band steel natural frequency and tension force, the conversion of strip tension distribution and plate shape parameter, and it comprises following a few part: 1. reference frequency is calculated (13); 2. the difference of the natural frequency of strip width each point that direction is surveyed and reference frequency is calculated (11), strip tension Distribution calculation and belt plate shape calculation of parameter (12); 3. at last the gained result is sent display to show.
It is a screen display that flatness defect shows, it can be with the situation of figure and digital dual mode while indicating strip flatness defect.
Operating mechanism of the present invention is, the present invention is installed on the endpiece of rolling mill for cold rolled steel strip, do not contact with the strip, the band steel is regularly added by vibrator when cold rolling and shakes, and detects the vibration signal of strip by vialog by vibration transducer, then the voltage that records or the simulating signal of electric current is inputed to microprocessor, through data acquisition, analog to digital conversion is carried out data processing by spectrum analysis module and plate shape message processing module, and send display indicating strip flatness situation with result of calculation.
Main performance index of the present invention: tape thickness 0.1～0.8mm; The cold rolling roll coil of strip of bandwidth 500～1200mm; Mill speed＜10m/S; Lateral resolution can be measured medium wave, side wave and 1/4 ripple; Response speed 4S; Measure crest value scope 0.2～4%; Display 12 inch rectangle CRT; Power supply 220V.
The present invention has following advantage: use the present invention not contact with the strip, therefore do not influence the surface quality of band steel, installation and maintenance are more convenient, also do not need milling train to shut down; The present invention is strengthened band steel self-vibration composition owing to adopt excitation method, can easily the band steel natural frequency of vibration be separated from mechanical system vibration and other noise component when carrying out spectrum analysis, therefore measures highly sensitive; The present invention adopts the spectrum analysis module of oneself developing, and the processing power of microprocessor is strengthened, and processing speed is accelerated, thereby has given full play to its processing capability in real time.Can be used on mill speed higher four roller units, reversible mill and the tandem mill.Because the present invention is furnished with the print record device, thus can be raw data, adopt and analyse the data spectrum analysis result, plate shape figure etc. prints; The present invention is simple in structure, highly versatile, it is reliable and stable to turn round, and there is clearly image demonstrate the situation of strip profile and flatness, it is the desirable operation indicating instrument of mill operators, the present invention can also be connected with the belt plate shape control device, constitutes closed-loop control system, and belt plate shape is carried out On-line Control and adjusting.
Claims (3)
1, a kind of contactless detecting instrument of flatness of cold-strip steel that has sensor is characterized in that this detecting instrument of flatness includes vibrator, plate shape measurement digital processing system.
2, Untouched cold-rolled strip steel platelike tester as claimed in claim 1, it is characterized in that said plate shape measurement digital processing system includes vibrator power supply and operation circuit, vibration detection, microprocessor and interface circuit, flatness defect display, spectrum analysis module and plate shape message processing module.
3, as claim 1 and 2 described Untouched cold-rolled strip steel platelike testers, it is characterized in that said vibrator is an electromagnetic actuator, adopt " E " font iron core, build up by siliconized plate, be wound with coil therebetween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86101203 CN86101203A (en) | 1986-02-21 | 1986-02-21 | Untouched cold-rolled strip steel platelike tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86101203 CN86101203A (en) | 1986-02-21 | 1986-02-21 | Untouched cold-rolled strip steel platelike tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86101203A true CN86101203A (en) | 1987-09-02 |
Family
ID=4801326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86101203 Withdrawn CN86101203A (en) | 1986-02-21 | 1986-02-21 | Untouched cold-rolled strip steel platelike tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86101203A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104624466A (en) * | 2014-11-04 | 2015-05-20 | 苏州珂锐铁电气科技有限公司 | Non-contact vibration leading device |
-
1986
- 1986-02-21 CN CN 86101203 patent/CN86101203A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104624466A (en) * | 2014-11-04 | 2015-05-20 | 苏州珂锐铁电气科技有限公司 | Non-contact vibration leading device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |