CN104111346B - Working and abrasion state on-line detection method for shield hob - Google Patents

Working and abrasion state on-line detection method for shield hob Download PDF

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Publication number
CN104111346B
CN104111346B CN201410341064.8A CN201410341064A CN104111346B CN 104111346 B CN104111346 B CN 104111346B CN 201410341064 A CN201410341064 A CN 201410341064A CN 104111346 B CN104111346 B CN 104111346B
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China
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hobboing cutter
wear
cutter
state
shield
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CN201410341064.8A
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CN104111346A (en
Inventor
郭京波
杨绍普
牛江川
周阳宗
章卫
刘进志
李�杰
赵红霞
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CHINA RAILWAY 16 BUREAU GROUP BEIJING METRO ENGINEERING CONSTRUCTION Co Ltd
Shijiazhuang Tiedao University
China Railway 16th Bureau Group Co Ltd
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CHINA RAILWAY 16 BUREAU GROUP BEIJING METRO ENGINEERING CONSTRUCTION Co Ltd
Shijiazhuang Tiedao University
China Railway 16th Bureau Group Co Ltd
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Abstract

The invention discloses a working and abrasion state on-line detection method for a shield hob and is applied to the technical field of shield construction. A detection device comprises two electrical vortex sensors, an acquisition circuit and an upper computer, the rotating speed of the shield hob is measured through one electrical vortex sensor, the abrasion loss of the hob is measured through the other electrical vortex sensor, and thereby, the moving state and the abrasion state of the hob can be determined. The working and abrasion state on-line detection method for the shield hob has the advantages that the moving state and the abrasion state of the shield hob can be timely monitored, a test method is convenient and easy to implement, a test result is accurate, the moving state and the abrasion state of the hob can be timely monitored so as to timely replace the hob, unnecessary loss caused by too early or late replacing of the hob can be reduced, and safe and smooth shield construction can be guaranteed.

Description

A kind of shield structure hobboing cutter work and state of wear online test method
Technical field
The invention belongs to Shield Construction Technique field.
Background technology
Along with shield machine widely using at home, tool wear has become the key issue that affects construction quality and progress.The integrity of cutter and the state of wear of cutter judge it is the key factor during shield structure normally tunnels, and how to judge motion state and the state of wear of cutter, tunnel safely most important to shield structure.When the wear extent of cutter arrives to a certain degree, must change immediately, otherwise the load closing on cutter can be increased, accelerate the rate of wear of residue cutter, form vicious cycle, therefore, accurately judge the motion state of cutter and state of wear, that instructs the replacing of cutter just to seem very in time is important.
Through retrieval, the patent No. is CN103472247A, discloses a kind of TBM hob rotating speed on-Line Monitor Device, and this device adopts current vortex sensor, utilizes non-contact measurement to excavate the rotating speed of hobboing cutter.The patent No. is CN1818640A, disclose the detection method of tool wear in a kind of rock tunnel(ling) machine tunneling process, utilize the wear condition of the boring parameter prediction cutter of development machine in tunneling process, comprise data acquisition, parameter extraction, Parameter analysis, by obtaining the deviation between the theoretical value of driving speed or cutter head torque and actual value, detect the wear condition of cutter.Pick-up unit in above-mentioned disclosed two patents or method relative complex, and will by calculating the state of wear obtaining hobboing cutter, processing speed can affect the accuracy of Real-Time Monitoring.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of shield structure hobboing cutter work and state of wear online test method, this method is by simple test macro, can accurately judge its motion state and state of wear, real-time monitor the state of wear of hobboing cutter thus in time tool changing, reduce early or cross the unnecessary loss that late tool changing brings.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of shield structure hobboing cutter work and state of wear online test method, it is characterized in that: adopt non-contact measurement, and weld at least 1 protruding block at the outside surface of cutter hub, utilize sensor, Acquisition Circuit and the host computer rotational speed state to shield structure hobboing cutter to measure; The change in displacement utilizing another sensor, Acquisition Circuit and host computer to aim at the cutter ring outmost turns of hobboing cutter is measured, thus judges its motion state and state of wear.
Above-mentioned description is described further, the pick-up unit that described detection method adopts comprises two current vortex sensors, Acquisition Circuit and host computers, adopt non-contact measurement, a range finding current vortex sensor is arranged on the cutter hub aiming at shield structure hobboing cutter, and weld two wimet protruding blocks about cutter hub center line symmetry at the outside surface of cutter hub, the rotational speed state of this current vortex sensor to shield structure hobboing cutter is measured; Another range finding current vortex sensor is aimed at the cutter ring of hobboing cutter, the wear extent of this current vortex sensor to hobboing cutter is measured, thus judges its motion state and state of wear;
The concrete steps of on-line checkingi comprise:
(1) open shield structure and sensor and measuring system, first utilize hobboing cutter to measuring the sensor current of tool abrasion, distance Curve measures, record its calibration curve, the current value then by measuring current vortex sensor calculates distance; Utilize the demarcation distance Curve of current vortex sensor, the distance D of timing signal survey sensor and cutter ring, read the magnitude of current I after the conversion of collection simultaneously; Through repeatedly changing D, and record corresponding magnitude of current I; The relational expression of I and D is simulated with least square line;
(2) judge the motion state of hobboing cutter: the mounting distance of record hobboing cutter cutter hub protruding block and current vortex sensor, utilizes host computer to judge, calculate rotating speed by record through the time interval of twice protruding block; If within the time that cutterhead rotates a circle, the protruding block of hobboing cutter still without twice, then illustrates that hobboing cutter is seized, and should stop shield machine and check;
(3) the installation initial distance of hobboing cutter cutter ring and current vortex sensor is recorded d, utilize host computer to observe hobboing cutter rotating speed, if rotating speed is not 0, then carry out step (4);
(4) when measuring tool wear, according to the electric current I read, calculating the distance D of sensor and hobboing cutter, thus learning the wear extent of hobboing cutter ;
(5) judge size thus determine the state of wear of hobboing cutter, the wear limit d of opposite side hobboing cutter maxcontrol, make d max≤ 20mm; If at d maxinterior mild increase, then hobboing cutter is in normal wear state; If fruit undergo mutation, then cutter ring fracture, need carry out tool changing; If in the process that hobboing cutter turns around, some bigger than normal continuously, another part less than normal continuously, then there is eccentric wear in hobboing cutter, should carry out tool changing; If fruit more than d max, hobboing cutter exceeds wear range, should carry out tool changing;
(6) repeat step (2), state of wear that (3), (4), (5) can obtain hobboing cutter in real time;
(7) on multiple hobboing cutter, sensor installation can record the state of wear of multiple hobboing cutter.
Be described further above-mentioned description, described current vortex sensor adopts probe diameter to be the probe of 25mm.
Be described further above-mentioned description, described Acquisition Circuit is that 4 ~ 20mA turns serial acquisition module.
The beneficial effect adopting technique scheme to produce is: by providing a kind of shield structure hob abrasion condition detection method, the state of wear of shield structure hobboing cutter can be monitored in time, detection method is simple and easy to do, result is accurate, the state of wear of hobboing cutter can be real-time monitored thus in time tool changing, reduce early or cross the unnecessary loss that brings of late tool changing, guarantee carrying out smoothly of shield-tunneling construction, ensure work efficiency.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is shield structure hobboing cutter motion state and wearing and tearing on-line measuring device schematic diagram.
Embodiment
Shield structure hobboing cutter motion state and wearing and tearing on-line measuring device composition as shown in Figure 1, comprise two current vortex sensors, Acquisition Circuit and host computers, a range finding current vortex sensor is wherein needed to be arranged on the cutter hub aiming at shield structure hobboing cutter, and the wimet protruding block that welding two is symmetrical on cutter hub; Another range finding current vortex sensor is aimed at the cutter ring of hobboing cutter.Utilize the current vortex sensor of the cutter hub aiming at shield structure hobboing cutter, by finding range and recording twice through the protruding time, measure the rotating speed of hobboing cutter; Utilize the current vortex sensor aiming at hobboing cutter cutter ring, changed by measuring distance, judge the state of wear of hobboing cutter.Wherein Acquisition Circuit is that 4 ~ 20mA turns serial acquisition module.
Concrete testing process is as follows:
First utilize hobboing cutter to measuring the electric current of sensor of tool abrasion, distance Curve measures, record its calibration curve, the current value then by measuring current vortex sensor calculates distance.Record current vortex sensor and hobboing cutter cutter ring edge initial distance dand wear extent d t ; The mounting distance of wimet protruding block and current vortex sensor on record hobboing cutter cutter hub d, utilize host computer to judge, calculate rotating speed by record through the time interval of twice wimet protruding block.If within the time that cutterhead rotates a circle, the wimet protruding block block of hobboing cutter still without twice, then illustrates that hobboing cutter does not rotate, and should stop shield machine and check.If hobboing cutter rotates, then utilize host computer to observe and show tool abrasion d t waveform, if amplitude is greater than the wear limit of opposite side hobboing cutter d max , then wear range is exceeded, wherein the wear limit d of limit hobboing cutter maxgenerally be no more than 20mm (can sets itself); If amplitude is between the two and waveform is mild, then hobboing cutter is in normal wear state; If there is huge fluctuation in amplitude waveform, then hobboing cutter fracture; If amplitude is between the two and occurs periodically continuous offset small magnitude, then hobboing cutter is in eccentric wear state, should carry out adjusting or tool changing.
In above-mentioned calibration process, need the demarcation distance Curve utilizing current vortex sensor, general by least square line fitting formula: i=1.364 × D-2.208( i: output current, unit: mA; D: probe and test specimen spacing, unit: mm).The distance of probe and hobboing cutter then can be calculated according to output current , thus learn the wear extent of hobboing cutter .
By above-mentioned detection method, the state of wear of shield structure hobboing cutter can be monitored in time, test method is simple and easy to do, test findings is accurate, the state of wear of hobboing cutter can be real-time monitored thus in time tool changing, reduce early or cross the unnecessary loss that brings of late tool changing, guarantee carrying out smoothly of shield-tunneling construction.

Claims (3)

1. a shield structure hobboing cutter job and state of wear online test method, it is characterized in that: the pick-up unit that described detection method adopts comprises two current vortex sensors, Acquisition Circuit and host computers, adopt non-contact measurement, a range finding current vortex sensor is arranged on the cutter hub aiming at shield structure hobboing cutter, and weld two wimet protruding blocks about cutter hub center line symmetry at the outside surface of cutter hub, the rotational speed state of this current vortex sensor to shield structure hobboing cutter is measured; Another range finding current vortex sensor is aimed at the cutter ring of hobboing cutter, the wear extent of this current vortex sensor to hobboing cutter is measured, thus judges its motion state and state of wear;
The concrete steps of on-line checkingi comprise:
(1) open shield structure and sensor and measuring system, first utilize hobboing cutter to measuring the sensor current of tool abrasion, distance Curve measures, record its calibration curve, the current value then by measuring current vortex sensor calculates distance; Utilize the demarcation distance Curve of current vortex sensor, the distance D of timing signal survey sensor and cutter ring, read the magnitude of current I after the conversion of collection simultaneously; Through repeatedly changing D, and record corresponding magnitude of current I; The relational expression of I and D is simulated with least square line;
(2) judge the motion state of hobboing cutter: the mounting distance of record hobboing cutter cutter hub protruding block and current vortex sensor, utilizes host computer to judge, calculate rotating speed by record through the time interval of twice protruding block; If within the time that cutterhead rotates a circle, the protruding block of hobboing cutter still without twice, then illustrates that hobboing cutter is seized, and should stop shield machine and check;
(3) the installation initial distance of hobboing cutter cutter ring and current vortex sensor is recorded d, utilize host computer to observe hobboing cutter rotating speed, if rotating speed is not 0, then carry out step (4);
(4) when measuring tool wear, according to the electric current I read, calculating the distance D of sensor and hobboing cutter, thus learning the wear extent of hobboing cutter ;
(5) judge size thus determine the state of wear of hobboing cutter, the wear limit d of opposite side hobboing cutter maxcontrol, make d max≤ 20mm; If at d maxinterior mild increase, then hobboing cutter is in normal wear state; If undergo mutation, then cutter ring fracture, need carry out tool changing; If in the process that hobboing cutter turns around, some bigger than normal continuously, another part less than normal continuously, then there is eccentric wear in hobboing cutter, should carry out tool changing; If fruit more than d max, hobboing cutter exceeds wear range, should carry out tool changing;
(6) repeat step (2), state of wear that (3), (4), (5) can obtain hobboing cutter in real time;
(7) on multiple hobboing cutter, sensor installation can record the state of wear of multiple hobboing cutter.
2. shield structure hobboing cutter work according to claim 1 and state of wear online test method, is characterized in that described current vortex sensor adopts probe diameter to be the probe of 25mm.
3. shield structure hobboing cutter work according to claim 1 and state of wear online test method, is characterized in that described Acquisition Circuit is that 4 ~ 20mA turns serial acquisition module.
CN201410341064.8A 2014-07-17 2014-07-17 Working and abrasion state on-line detection method for shield hob Active CN104111346B (en)

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CN104792369A (en) * 2015-04-30 2015-07-22 中铁工程装备集团有限公司 Wireless detecting device for rotating speed and abrasion of hobbing cutter of shield machine
CN106499400B (en) * 2016-11-07 2018-12-14 中铁工程装备集团有限公司 Quick-installed shield machine roller cutter state on-line detecting system and method
CN106767621B (en) * 2017-01-23 2019-04-30 同济大学 A kind of device and method for measuring dish-type hob abrasion amount and wearing shape
CN108168808B (en) * 2017-12-22 2020-03-24 武汉大学 Shield cutter abrasion test model cutter head with adjustable structure
CN108387195B (en) * 2017-12-25 2020-07-31 中铁工程装备集团有限公司 Hob abrasion loss measuring method for normal-pressure tool changing cutter
CN108181484B (en) * 2017-12-25 2021-04-02 中铁工程装备集团有限公司 Device for measuring rotating speed and temperature of hobbing cutter of normal-pressure cutter head and method for measuring abrasion loss
CN108381294B (en) * 2018-03-05 2020-06-16 常州工程职业技术学院 Cutter wear control method and device based on wireless communication
CN108267250A (en) * 2018-04-19 2018-07-10 中铁工程装备集团有限公司 A kind of shield hobboing cutter stress on-Line Monitor Device based on fiber-optic grating sensor
CN108716897B (en) * 2018-06-23 2021-01-12 中铁九局集团第四工程有限公司 Quantitative detection method and detection device for wear of shield machine cutter based on Internet of things technology
CN109765399A (en) * 2019-01-18 2019-05-17 中铁工程装备集团有限公司 The calibration facility of hobboing cutter device for dynamically detecting
CN110595360A (en) * 2019-09-20 2019-12-20 李睿 Hob state real-time monitoring device in shield construction and operation judgment method

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