CN103624114B - A kind of metal tube automatic school circle system and processing method thereof - Google Patents
A kind of metal tube automatic school circle system and processing method thereof Download PDFInfo
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Abstract
The invention discloses a kind of metal tube automatic school circle system and processing method thereof.Comprise PLC, industrial computer, position sensor, pipe diameter identification system, frequency converter, roller motor, encoder is detected in position, the caliber detection part that CCD camera or laser range finder are formed, carrying roller and caliber means for correcting, described pipe diameter identification system, position sensor and position are detected encoder and are connected with the input of PLC, described industrial computer and PLC are bi-directionally connected, roller motor is electrically connected by the output of frequency converter with described PLC, described CCD camera is electrically connected with industrial computer, described roller motor drives metal tube to rotate by carrier roller mechanism, described caliber means for correcting is controlled by described PLC.Described system can realize automatically mixing Guan Jiaoyuan, enhances productivity, rate of reducing the number of rejects and seconds.
Description
Technical field
The present invention relates to metal tube detection technique field, particularly relate to a kind of metal tube automatic school circle treatment system.
Background technology
Use the molten casting iron of more than No. 18 after adding nodulizer, through the fluid origin tubing of centrifugal ductile pig machine high speed centrifugation, be referred to as " ductile iron pipe ", referred to as bulb, ductile iron pipe and ductile iron pipe etc.Ductile iron pipe is the one of metal tube, is the alloy of a kind of iron, carbon and silicon.In spheroidal graphite cast-iron, graphite exists with balled form, the size of general graphite is 6-7 level, require that the nodulizing grade of cast iron pipe controls as 1-3 level (Oxygen potential is greater than 80%) qualitatively, thus the mechanical performance of material itself obtains good improvement, has the essence of iron, the performance of steel.Its metallographic structure of ductile iron pipe after annealing is that ferrite adds a small amount of pearlite, satisfactory mechanical property, antiseptic property is excellent, ductility is good, good sealing effect, install simple and easy, be mainly used in municipal administration, industrial and mining enterprises' feedwater, gas transmission, the fields such as oil transportation, be the first-selection of pipe material for water supply, there is very high cost performance.
In the prior art, ductile iron pipe Calibration mostly is and manually adopts survey tool to measure; Use mark circle to measure the logical straight external diameter of ductile iron pipe, use the wall thickness of kind of calliper ductile iron pipe, operating personnel judge the compliance of tube outer diameter size according to measurement result establishing criteria.For the underproof pipe of measurement size, operating personnel operate hydro-mechanical unit makes pipe generation deformation with in the scope making pipe shaft size and reach qualified from tube exterior extruding, directly carry out sentencing useless process for repeatedly extruding still underproof pipe, traditional measurement and bearing calibration hand labor intensity is large, to measure efficiency low.
Japanese documentation TOHKEMY 2006-272365A discloses a kind of metal tube pipe end apparatus for correcting, it comprises external diameter measuring device 1, controller 2 and apparatus for correcting 4, external diameter measuring device comprises arm 1a, be supported in feeler 1b on arm 1a and rotational source 1c, rotational source 1c drives feeler 1b along the circumferential direction to revolve and turns around, and feeler 1b scans steel pipe P outer surface one and encloses thus the position that can obtain the shape of steel pipe P pipe end and maximum outside diameter, minimum diameter, minimum diameter; Carrying roller 3a, 3b support and steel pipe P are circumferentially rotated, and rotary speed, rotational time are controlled, and means for correcting 4 is positioned at the inside of steel pipe P, according to the circularity skew exported from controller 2 and corrected value, correct the circularity of steel pipe P.Because metal tube product is a lot of with diameter different model, in process of production, in order to the metal tube adapting to different tube diameters detects, technical scheme as above will be faced with the problem of adjustment external diameter measuring device, to adapt to the quality testing needs of different tube diameters metal tube, but in order to realize automated production, such adjustment will inevitably have influence on the continuity of production; If arrange multiple detection station for different model caliber metal tube, will cost be increased on the one hand, more working space will be occupied on the other hand.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of metal tube automatic school circle system, to realize the mixed Guan Jiaoyuan system that can need towards different tube diameters metal tube school circle.Described system can detect caliber and the ovality of ductile iron pipe automatically, to the underproof pipe automatic calibration of measurement, to after repeatedly correcting still underproof cast tube sentence useless process.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of metal tube automatic school circle treatment system, it comprises electric control system, IMAQ part, caliber means for correcting and pipe diameter identification system, described pipe diameter identification system is for detecting the caliber of metal tube, and caliber information is sent to described electric control system, described electric control system makes metal tube rotate according to the speed preset according to pipe diameter size; Described IMAQ part carries out IMAQ according to the number of times of taking pictures preset to pipe end according to pipe diameter size, process image recognition pipe end caliber information simultaneously, and sending school circle instruction according to described pipe end caliber information to described electric control system, described electric control system makes metal tube be rotated in place to coordinate the school of described caliber means for correcting to justify action.
Or, a kind of metal tube automatic school circle treatment system, it comprises electric control system, laser ranging part, caliber means for correcting and pipe diameter identification system, caliber information for detecting the caliber of metal tube, and is sent to described electric control system by described pipe diameter identification system, and described electric control system makes metal tube rotate according to the speed preset according to pipe diameter size; Described laser ranging part measures metal tube tube end diameter according to pipe diameter size according to the detection number of times preset, and sending school circle instruction according to described pipe end caliber information to described electric control system, described electric control system makes metal tube be rotated in place to coordinate the school of described caliber means for correcting to justify action.
Preferably, the electric control system of this metal tube automatic school circle treatment system comprises PLC, industrial computer, position sensor, pipe diameter identification system, frequency converter, roller motor, encoder is detected in position, CCD camera, carrying roller and caliber means for correcting, described pipe diameter identification system, position sensor and position are detected encoder and are connected with the input of PLC, described industrial computer and PLC are bi-directionally connected, roller motor is electrically connected by the output of frequency converter with described PLC, described CCD camera is electrically connected with industrial computer, described roller motor is fixedly connected with carrying roller, carrying roller drives metal tube to be detected to rotate, described caliber means for correcting is controlled by described PLC.
Preferably, the image acquisition part of this metal tube automatic school circle treatment system is divided and is comprised industrial computer and CCD camera, described industrial computer controls the capture process of described CCD camera, and sends school circle instruction according to described pipe end caliber information to described electric control system.
Preferably, the laser ranging part of this metal tube automatic school circle system comprises industrial computer and laser range finder, described industrial computer controls the measuring process of described laser range finder, and sends school circle instruction according to described pipe end caliber information to described electric control system.
Preferably, described caliber means for correcting performs expanding-contracting action under the control of described electric control system, and stroke is determined according to the described pipe end caliber information collected by described industrial computer; Electric control system adjusts described metal tube according to the pipe end caliber extreme value position of described position detection encoder detection record makes the telescopic direction of described caliber means for correcting consistent with pipe end extreme value place direction; The pipe end caliber information of usual collection comprises pipe end caliber average, ovality and caliber extreme value etc.
Preferably, described CCD camera is positioned at directly over metal tube to be detected.
Preferably, described two laser range finders to be positioned at directly over metal tube to be measured and immediately below.
Preferably, described pipe diameter identification system is positioned at left side or the right side of described metal tube to be detected.
Preferably, described carrying roller is provided with two groups, and described position sensor is between two groups of carrying rollers, and described position is detected encoder and is fixed on described carrying roller.
Preferably, described carrying roller is positioned at the two ends of described metal tube to be detected, and described carrying roller and metal tube to be detected form point cantact.
Preferably, described metal tube comprises ductile iron pipe.
The metal tube automatic school circle processing method that the present invention proposes comprises following step:
A. position sensor detects metal tube and whether enters sired results position, school;
If b. metal tube puts in place, PLC starts pipe diameter identification system, and caliber information is sent in described PLC by described pipe diameter identification system;
C., after described PLC time delay setting-up time, drive roller motor to rotate according to pipe diameter size according to preset rotation speed, roller motor rotates metal tube by carrier roller mechanism;
D. while sending driving instruction to roller motor, described PLC sends instruction to industrial computer, described industrial computer starts CCD camera and takes pipe end image according to the preset frequency of mating with pipe diameter size after receiving instruction, described industrial computer synchronously starts to process image, calculate pipe end caliber information, and judge that whether metal tube is qualified;
E. for underproof metal tube, industrial computer sends signal to described PLC, and PLC controls according to this signal the school circle action that caliber means for correcting performs pipe end.
Described system comprises part of data acquisition and electric control system, part of data acquisition comprises sensor and CCD camera, industrial computer gathers the caliber data of ductile iron pipe by CCD camera and carries out data processing by the software in industrial computer, calculate the ovality information of ductile iron pipe, and calculate caliber size information by related sensor and PLC, electric control system adopts PLC to realize, the caliber collected according to industrial computer and PLC and ovality information, realize the control to caliber means for correcting, thus described system automatically can detect and judges that whether ductile iron pipe is qualified, count the qualification rate of ductile iron pipe caliber size, and then automatic school circle can be realized to underproof product, to repeatedly correct after still inappropriate product carry out rejectings process, improve the quality of ductile iron pipe, reduce the labour intensity of workman, improve the degree of accuracy of operating efficiency and measurement, improve the working environment of operating personnel.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is the principle schematic of embodiment 1;
Fig. 2 is the method flow diagram of embodiment 1;
Fig. 3 is the principle schematic of embodiment 2;
Fig. 4 is the method flow diagram of embodiment 2;
Wherein: 1, encoder 8, CCD camera 9, metal tube to be detected 10, carrier roller mechanism 11, caliber means for correcting 12 laser range finder are detected in PLC 2, industrial computer 3, position sensor 4, pipe diameter identification system 5, frequency converter 6, roller motor 7, position.
Detailed description of the invention
Embodiment 1:
As shown in Figure 1, a kind of metal tube automatic school circle system, comprises PLC 1, industrial computer 2, position sensor 3, pipe diameter identification system 4, frequency converter 5, roller motor 6, position detection encoder 7, CCD camera 8, carrier roller mechanism 10.Described industrial computer 2 is bi-directionally connected with described PLC 1, pipe diameter identification system 4, position sensor 3 and position are detected encoder 7 and are electrically connected with PLC 1, roller motor 6 is electrically connected with the output of described PLC 1 by frequency converter 5, described CCD camera 8 or laser range finder 12 are electrically connected with industrial computer 2, described roller motor 6 is fixedly connected with carrier roller mechanism 10, and carrier roller mechanism 10 drives metal tube 9 to be detected to rotate.
Preferably, in order to take pictures conveniently, described CCD camera 8 is positioned at directly over the socket end of metal tube 9 to be detected, the socket pipe end image before being used for taking metal tube hydraulic pressure detection experiment and after test.Described pipe diameter identification system 4 is positioned at left side or the right side of described metal tube to be detected 9, for identifying the information of caliber.Described carrier roller mechanism 10 is provided with two groups, often organize two, described position sensor 3 is between two groups of carrier roller mechanisms, described position is detected encoder 7 and is fixed on described carrier roller mechanism 10, described position is detected encoder 7 and is coaxially installed with the monomer carrying roller of carrier roller mechanism 10, roller motor 6 drives carrier roller mechanism 10 to rotate, carrier roller mechanism 10 drives metal tube 9 to be detected to rotate, when metal tube 9 to be detected is put between two groups of carrier roller mechanisms 10, position sensor 3 perceives metal tube 9 and places, and relevant information is sent to PLC 1.
Often organize the two ends that carrier roller mechanism 10 is positioned at described metal tube to be detected 9, described carrier roller mechanism 10 forms point cantact, in order to reduce carrying roller wearing and tearing to metal tube body periphery in rotary course with two ends of metal tube 9 to be detected.
The workflow of described system is as follows:
(1) when metal tube enters into the station with this system, position sensor has detected pipe, PLC controls pipe diameter identification system and starts, metal tube caliber information on this station is passed to PLC, and the program in PLC goes out the metal tube caliber essential information on now school sired results position according to the input-signal judging of sensor;
(2) after identifying caliber information, PLC sends metal tube and rotates control instruction, control roller motor after PLC Program time delay setting-up time to rotate, roller motor drives carrying roller to rotate, in the program of PLC, the metal tube of different tube diameters is driven in rotation according to different desired speeds;
(3) while PLC sends pipe rotate instruction, instruction is sent to industrial computer, pipe rotating 360 degrees, the anglec of rotation detects and is detected by the position coder be arranged on roller carrier shaft, in metal tube rotating 360 degrees process, CCD camera takes multiple series of images according to the frequency with match of pipe diameter in socket end, image transmitting is stored in industrial computer, industrial computer goes out one group of caliber numerical value of this metal tube according to program computation, and calculating mean value and ovality, judge maximum value position and the minimum of a value position of caliber;
(4) to the underproof metal tube of detection caliber, industrial computer issues PLC signal, PLC, according to the caliber extreme value place of position coder detection record, controls carrying roller and rotates, the minimum of a value position of caliber is in and is positioned at horizontal or vertical direction;
(5) after pipe is rotated in place, PLC controls caliber means for correcting and enters pipe end from socket side, caliber means for correcting makes pipe pipe shaft generation deformation correct by flexible tensioner, it is qualified that namely the scope that the rear pipe shaft ovality of correction reaches quality requirement is judged to be, after correction, repeat step (3), judge whether ovality reaches the scope of quality requirement, as qualified, enter subsequent processing;
(6) detect after repeatedly correcting ovality still underproof pipe will be judged as defective, the information of this defective pipe of industrial computer record, and add up disqualification rate.
Described system can calculate the stroke of caliber means for correcting needs according to the metal tube ovality recorded and empirical equation, correcting mode has two kinds: outwards extrude from tube interior and inwardly extrude from tube exterior.Described system can adjust the position of carrying roller automatically according to measurement result, ensure the uniformity in caliber means for correcting telescopic direction and the oval direction, extreme value place place of metal tube.For socket caliber minimum of a value position, carrying roller rotates and makes this position be in horizontal direction, caliber means for correcting is as oil cylinder, enter in socket pipe end, according to the predetermined stroke calculated as caliber mean value level apply extruding force, make the diameter of caliber means for correcting reach this predetermined stroke.
Described system comprises part of data acquisition and electric control system, part of data acquisition comprises sensor and CCD camera, industrial computer gathers the caliber data of metal tube by CCD camera and carries out data processing by the image processing software in industrial computer, calculates the ovality information of metal tube, electric control system adopts PLC to realize, according to pipe end caliber information (the pipe end caliber average that industrial computer collects, ovality, caliber extreme value etc.) and and position detect the caliber maximum that collects of encoder or minimum of a value positional information, realize the control to caliber means for correcting, thus described system automatically can detect and judges that whether metal tube is qualified, count the qualification rate of metal tube caliber size, and then automatic school circle can be realized to underproof product, to correction after still inappropriate product carry out rejectings process, improve the quality of metal tube, reduce the labour intensity of workman, improve the degree of accuracy of operating efficiency and measurement, improve the working environment of operating personnel.
Embodiment 2:
In the present embodiment, utilize CCD camera to gather image in alternative embodiment 1 thus detect the scheme of metal tube diameter, replace, adopt laser triangulation principle, under metal tube rotation status as described in Example 1, detect the metal tube caliber under diverse location, obtain one group of metal tube caliber numerical value, judge maximum caliber value position or minimum pipe value position, then according to mode as described in example 1 above, perform school circle process by caliber means for correcting.
As shown in Figure 2, just going up of metal tube 9, a laser range finder 12 is respectively set with positive upper/lower positions, just going up and can determine by carrier roller mechanism 10 with positive upper/lower positions, laser range finder 12 position is fixed, when position sensor 3 retrieves after metal tube 9 puts in place, upper and lower two laser range finders 12 can be started working, and detect caliber according to range of triangle principle; When metal tube 9 rotates according to setting speed, laser range finder 12 gather one group of metal tube rotate to diverse location under caliber numerical value.Afterwards according to mode as described in Example 1, under the control of industrial computer 3 and PLC 1, perform school circle action.
The workflow of described system is as follows:
(1) when metal tube enters into the station with this system, position sensor has detected pipe, PLC controls pipe diameter identification system and starts, metal tube caliber information on this station is passed to PLC, and the program in PLC goes out the metal tube caliber essential information on now school sired results position according to the input-signal judging of sensor;
(2) after identifying caliber information, PLC sends metal tube and rotates control instruction, control roller motor after PLC Program time delay setting-up time to rotate, roller motor drives carrying roller to rotate, in the program of PLC, the metal tube of different tube diameters is driven in rotation according to different desired speeds;
(3) while PLC sends pipe rotate instruction, instruction is sent to industrial computer, pipe is rotating 360 degrees altogether, the anglec of rotation detects and is completed by the position coder be arranged on roller carrier shaft, in metal tube rotating 360 degrees process, laser range finder gathers multiple caliber numerical value according to the frequency with match of pipe diameter in socket end, industrial computer is according to this group caliber numerical value of program process, and calculating mean value and ovality, judge maximum value position and the minimum of a value position of caliber;
(4) to the underproof metal tube of detection caliber, industrial computer issues PLC signal, PLC, according to the caliber extreme value place of position coder detection record, controls carrying roller and rotates, the minimum of a value position of caliber is in and is positioned at horizontal or vertical direction;
(5) after pipe is rotated in place, PLC controls caliber means for correcting and enters pipe end from socket side, caliber means for correcting makes pipe pipe shaft generation deformation correct by flexible tensioner, it is qualified that namely the scope that the rear pipe shaft ovality of correction reaches quality requirement is judged to be, after correction, repeat step (3), judge whether ovality reaches the scope of quality requirement, as qualified, enter subsequent processing;
(6) detect after repeatedly correcting ovality still underproof pipe will be judged as defective, the information of this defective pipe of industrial computer record, and add up disqualification rate.
Apply specific case herein to set forth principle of the present invention and embodiment thereof, the explanation of above embodiment is only used to help to understand method of the present invention and core concept thereof.It should be pointed out that for the person of ordinary skill of the art, can also carry out some improvement and modification under the premise without departing from the principles of the invention to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (17)
1. a metal tube automatic school circle system, it comprises electric control system (1,3,5,6,7,10), IMAQ part (2,8) and caliber means for correcting (11), is characterized in that, also comprise pipe diameter identification system (4), caliber information for detecting the caliber of metal tube, and is sent to described electric control system by described pipe diameter identification system (4), and described electric control system makes metal tube rotate according to the speed preset according to pipe diameter size; Described IMAQ part carries out IMAQ according to the number of times of taking pictures preset to pipe end according to pipe diameter size, process image recognition pipe end caliber information simultaneously, and sending school circle instruction according to described pipe end caliber information to described electric control system, described electric control system makes metal tube be rotated in place to coordinate the school of described caliber means for correcting (11) to justify action.
2. metal tube as claimed in claim 1 automatic school circle system, it is characterized in that described electric control system (1,3,5,6,7,10) PLC (1), position sensor (3), position detection encoder (7), frequency converter (5), roller motor (6), carrier roller mechanism (10) is comprised; Described position sensor (3) and position are detected encoder (7) and are electrically connected with PLC, described roller motor (6) is electrically connected with described PLC (1) by frequency converter (5), described roller motor (6) drives carrier roller mechanism (10), and carrier roller mechanism (10) drives described metal tube (9) to rotate.
3. metal tube as claimed in claim 1 automatic school circle system, it is characterized in that described IMAQ part (2,8) industrial computer (2) and CCD camera (8) is comprised, described industrial computer (2) controls the capture process of described CCD camera (8), and sends school circle instruction according to described pipe end caliber information to described electric control system.
4. metal tube as claimed in claim 2 automatic school circle system, is characterized in that described caliber means for correcting (11) can adopt from pipe end externally to interior extruding or from the school circle mode that pipe end inwall outwards extrudes.
5. metal tube as claimed in claim 4 automatic school circle system, it is characterized in that described caliber means for correcting (11) performs expanding-contracting action under the control of described electric control system, stroke is determined according to the described pipe end caliber information collected by industrial computer.
6. metal tube as claimed in claim 4 automatic school circle system, is characterized in that described electric control system adjusts described metal tube according to the pipe end caliber extreme value position of described position detection encoder (7) detection record and makes the telescopic direction of described caliber means for correcting (11) consistent with pipe end extreme value place direction.
7. metal tube as claimed in claim 5 automatic school circle system, is characterized in that described pipe end caliber information comprises ovality and caliber extreme value.
8. metal tube as claimed in claim 2 automatic school circle system, is characterized in that described PLC (1) controls described roller motor (6) according to different caliber information and drives metal tube at the uniform velocity to rotate with different default rotary speeies.
9. metal tube as claimed in claim 3 automatic school circle system, is characterized in that described CCD camera (8) is positioned at directly over described pipe end.
10. metal tube as claimed in claim 1 automatic school circle system, is characterized in that described pipe diameter identification system (4) is positioned at left side or the right side of described metal tube.
11. metal tube as claimed in claim 2 automatic school circle systems, it is characterized in that described carrier roller mechanism (10) is provided with two groups, one group comprises two carrying rollers, described position sensor (3) is positioned between two groups of carrier roller mechanisms (10), and described position is detected encoder (7) and coaxially installed with the monomer carrying roller of carrier roller mechanism (10).
12. metal tube as claimed in claim 11 automatic school circle systems, it is characterized in that each group of carrier roller mechanism (10) is supported in the two ends of described metal tube, described carrying roller and pipe end form point cantact.
13. 1 kinds of metal tube automatic school circle processing methods, it comprises following treatment step:
A. position sensor (3) detects metal tube and whether enters sired results position, school;
If b. metal tube puts in place, PLC (1) starts pipe diameter identification system (4), and caliber information is sent in described PLC (1) by described pipe diameter identification system (4);
C., after described PLC (1) time delay setting-up time, drive roller motor (6) to rotate according to pipe diameter size according to preset rotation speed, roller motor rotates metal tube by carrier roller mechanism;
D. while sending driving instruction to roller motor (6), described PLC (1) sends instruction to industrial computer (2), start CCD camera after described industrial computer (2) receives instruction and take pipe end image according to the preset frequency of mating with pipe diameter size, described industrial computer (2) synchronously starts to process image, calculate pipe end caliber information, and judge that whether metal tube is qualified;
E. for underproof metal tube, industrial computer (2) sends signal to described PLC (1), and PLC controls according to this signal the school circle action that caliber means for correcting (11) performs pipe end.
14. 1 kinds of metal tube automatic school circle systems, it comprises electric control system (1,3,5,6,7,10), and laser ranging part (2,12) and caliber means for correcting (11), is characterized in that,
Also comprise pipe diameter identification system (4), caliber information for detecting the caliber of metal tube, and is sent to described electric control system by described pipe diameter identification system (4), and described electric control system makes metal tube rotate according to the speed preset according to pipe diameter size; Described laser ranging part measures metal tube tube end diameter according to pipe diameter size according to the detection number of times preset, and sending school circle instruction according to described pipe end caliber information to described electric control system, described electric control system makes metal tube be rotated in place to coordinate the school of described caliber means for correcting (11) to justify action.
15. metal tube as claimed in claim 14 automatic school circle systems, it is characterized in that described electric control system (1,3,5,6,7,10) PLC (1), position sensor (3), position detection encoder (7), frequency converter (5), roller motor (6), carrier roller mechanism (10) is comprised; Described position sensor (3) and position are detected encoder (7) and are electrically connected with PLC, described roller motor (6) is electrically connected with described PLC (1) by frequency converter (5), described roller motor (6) drives carrier roller mechanism (10), and carrier roller mechanism (10) drives described metal tube (9) to rotate.
16. metal tube as claimed in claim 14 automatic school circle systems, it is characterized in that described laser ranging part (2,12) industrial computer (2) and laser range finder (12) is comprised, described industrial computer (2) controls the measuring process of described laser range finder (12), and sends school circle instruction according to described pipe end caliber information to described electric control system.
17. 1 kinds of metal tube automatic school circle processing methods, it comprises following treatment step:
A. position sensor (3) detects metal tube and whether enters sired results position, school;
If b. metal tube puts in place, PLC (1) starts pipe diameter identification system (4), and caliber information is sent in described PLC (1) by described pipe diameter identification system (4);
C., after described PLC (1) time delay setting-up time, drive roller motor (6) to rotate according to pipe diameter size according to preset rotation speed, roller motor rotates metal tube by carrier roller mechanism;
D. while sending driving instruction to roller motor (6), described PLC (1) sends instruction to industrial computer (2), start laser range finder (12) after described industrial computer (2) receives instruction and detect tube end diameter according to the preset frequency of mating with pipe diameter size, described industrial computer (2) processes the one group of pipe end footpath value detected, and judges that whether metal tube is qualified;
E. for underproof metal tube, described industrial computer (2) sends signal to described PLC (1), and PLC controls according to this signal the school circle action that caliber means for correcting (11) performs pipe end.
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| CN102650516B (en) * | 2011-02-28 | 2014-10-29 | 宝山钢铁股份有限公司 | On-line measuring method and device for outer diameter and ovality of large-diameter steel pipe end |
| CN103364403A (en) * | 2012-04-06 | 2013-10-23 | 鸿富锦精密工业（深圳）有限公司 | Automatic product quality control and management system and method |
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