CN112985273A - Side type non-contact round billet length measuring method and measuring device - Google Patents
Side type non-contact round billet length measuring method and measuring device Download PDFInfo
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- CN112985273A CN112985273A CN202110316834.3A CN202110316834A CN112985273A CN 112985273 A CN112985273 A CN 112985273A CN 202110316834 A CN202110316834 A CN 202110316834A CN 112985273 A CN112985273 A CN 112985273A
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- photoelectric sensor
- billet
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a side type non-contact round billet length measuring method and a measuring device, which are characterized in that the measuring method comprises the steps of starting length measurement, starting a servo motor, detecting and recording the front end of a billet by a photoelectric sensor, detecting and recording the rear end of the billet by the photoelectric sensor, calculating the length of the billet and the like; the measuring device comprises a roller bed base and a conveying roller bed, wherein a base is arranged on one side of the roller bed base, measuring equipment is arranged on an aluminum profile cross beam of the base, a servo motor with an encoder is installed on a linear guide rail on the side surface of the aluminum profile cross beam, and a gear on an output shaft of the servo motor with the encoder is meshed with a rack on the aluminum profile cross beam to realize gear-rack transmission; a servo motor with an encoder drives a drag chain bracket of the measuring device and a photoelectric sensor to move horizontally through a gear rack; the whole device is of a side type, is convenient to maintain, reduces the downtime, eliminates the potential safety hazard of personnel, ensures the safe and smooth operation of production and equipment, and has accurate measurement and high measurement stability.
Description
Technical Field
The invention relates to the electromechanical technical field, in particular to a side type non-contact round billet length measuring method and a measuring device; the device is used for automatically measuring the incoming material length of the blank in the production process of the large-caliber seamless steel pipe, and is suitable for round steel blanks with the diameter phi of more than 300mm and less than 460 mm.
Background
The method comprises the following steps that a steel billet of an incoming material long is required to be segmented before seamless steel tube production, steel billets of different lengths are segmented according to different technological specifications of the steel tube, the allowable error of the incoming material length is 0-5 cm due to the production technological problem of the steel billet, at present, a tape measure is manually adopted for sampling inspection, the inspection standard is 0-5 cm, and the feeding is subjected to segmented saw cutting after the inspection; two problems exist in the actual process, namely 1, when the feeding information is wrong, if an operator does not find the wrong feeding information in time, waste is cut, and steel billets are wasted; 2. when the actual length is larger than the theoretical length, if the actual length is 5cm, the length of the last section of billet is about 5cm longer than that of the other sections of billet, the elongation rate can reach 20 times after rolling, the finished product saw cuts according to group saw cutting and only can saw according to the shortest steel pipe, the grown steel pipe is cut off, the waste is large, and the yield is influenced.
At present, the laser length measuring equipment is axially installed on a steel billet in the industry, but the laser length measuring equipment has the following problems that 1, when the smooth surface of the end of the steel billet or a label is pasted, the reflectivity is poor, and the measured data is inaccurate; 2. because the laser length measurement is axial measurement, the length measurement device can only be installed in a billet traveling path, and only a lifting device can be designed, so that the laser length measurement device is easy to damage due to slight detection error.
The other is contact measurement, a passive pinch roller is contacted with the surface of a steel billet to drive an encoder to count, the pinch roller is easy to damage, relative sliding is easy to generate to cause measurement inaccuracy, and the device is easy to destructively crash when chain protection is abnormal.
Another common method is to use an encoder mounted on the shaft of the roller conveyor, which often causes slippage between the roller and the billet due to bending of the billet, and thus, measurement inaccuracy is very likely to occur.
Disclosure of Invention
The present invention is to overcome the above-mentioned shortcomings of the prior art, and to provide a side type non-contact round billet length measuring method.
The invention also aims to provide a measuring device for realizing the side-type non-contact round billet length measuring method.
The technical scheme of the invention is as follows: a side type non-contact round billet length measuring method is characterized by comprising the following process steps:
a, starting length measurement, conveying a steel billet to be measured to a stop area through a conveying roller way, and sending the running stop state of the steel billet roller way to a length measurement PLC by a conveying roller way control system;
b, starting a servo motor, and driving the servo motor to drive the photoelectric sensor to move from left to right at a constant speed through a servo driver;
c, detecting and recording the front end of the steel billet by the photoelectric sensor, changing a detection signal of the photoelectric sensor from 0 to 1 after a light beam of the photoelectric sensor touches the front end of the steel billet, and triggering the PLC to record the current servo motor encoder value S1;
d, detecting and recording the rear end of the steel billet by the photoelectric sensor, continuously moving to the rear end of the steel billet, changing a detection signal of the photoelectric sensor from 1 to 0, and triggering the PLC to record the current position S2 of the servo motor;
e, calculating the length of the billet according to the difference between S2 and S1, and if the length of the billet is L, then L = S2-S1;
f, finishing the measurement and waiting for the next billet.
Furthermore, the moving speed of the photoelectric sensor driven by the servo motor is 0.2m/s, and the system error is within 3 mm.
The measuring device of the side type non-contact round billet length measuring method comprises a roller bed base, wherein a conveying roller bed is arranged on the roller bed base; the roller bed is characterized in that a base is arranged on one side of the roller bed base, and an aluminum profile cross beam is arranged on the base; the aluminum profile cross beam is provided with measuring equipment; the measuring equipment consists of a photoelectric sensor, an L-shaped sensor bracket, a cable drag chain and a drag chain bracket, wherein the photoelectric sensor is fixed on the L-shaped sensor bracket; the side surface of the aluminum profile beam is horizontally provided with two parallel linear guide rails, a servo motor with an encoder is fixed on a sliding seat of the linear guide rails, an output shaft of the servo motor with the encoder is provided with a gear, and the gear is meshed with a rack which is fixed on the aluminum profile beam and positioned between the two linear guide rails, so that gear-rack transmission is realized; a servo motor with an encoder drives the drag chain support and the photoelectric sensor to move in the horizontal direction through a gear rack.
Compared with the prior art, the side type non-contact round billet length measuring method and the measuring device have the prominent substantive characteristics and remarkable progress: 1. the whole device is in non-contact measurement, and the safety distance of the whole device and the measured steel billet is kept above 500mm, so that equipment damage caused by bending of the steel billet is avoided; 2. the device adopts a transmission mode of a gear and a rack, and is matched with a photoelectric sensor for detection, so that the problem of inaccurate measurement data caused by 'slipping' of a roller type encoder measurement system is effectively avoided; 3. the device adopts a very mature photoelectric sensor for detection, the detection signal is a switching value, the device is stable and reliable, and the problem of unstable reflection signal of the original laser length measurement mode is avoided; 4. the whole device is of a side type, so that the maintenance is convenient; the downtime is reduced, the potential safety hazard of personnel is eliminated, and the safe and smooth operation of production and equipment is ensured; the measurement is accurate, and the measurement stability is high.
Drawings
FIG. 1 is a flow chart of a measurement method of the present invention;
FIG. 2 is a schematic front view of the measuring device of the present invention;
FIG. 3 is a side view of FIG. 2;
fig. 4 is an oblique view of fig. 2.
In the figure: 1 steel billet that awaits measuring, 2 rollgang, 3 roll table bases, 4 photoelectric sensor, 5L type sensor support, 6 cable tow chains, 7 tow chain supports, 8 servo motor of taking the encoder, 9 rack and pinion, 10 linear guide rail, 11 aluminium alloy crossbeams, 12 bases.
Detailed Description
For a better understanding and appreciation of the invention, specific embodiments thereof are described in detail below with reference to the accompanying drawings.
As shown in fig. 1, 2, 3 and 4, the side non-contact round billet length measuring device comprises a roller bed base 3, and a conveying roller bed 2 is arranged on the roller bed base 3; a base 12 is fixed on one side of the roller bed base 3, the base 12 is composed of 4 sets of equidistant upright columns, the upright columns are fixed by planting bolts on the ground, the upright columns are made of H-shaped steel, and an aluminum profile beam 11 is installed on the upright columns of the base 12 through bolts; the method comprises the following steps that measuring equipment is installed on an aluminum profile beam 11, the measuring equipment consists of a photoelectric sensor 4, an L-shaped sensor support 5, a cable drag chain 6 and a drag chain support 7, the photoelectric sensor 4 is fixed on the L-shaped sensor support 5 through a positioning bolt, the L-shaped sensor support 5 is installed on the drag chain support 7 through a bolt, one end of the cable drag chain 6 is fixed in a drag chain guide groove, and the other end of the cable drag chain is fixed on the drag chain support 7 through a bolt; two parallel linear guide rails 10 are installed on the side face of an aluminum profile beam 11 in the horizontal direction through bolts, a servo motor 8 with an encoder is installed on a square installation plate through bolts in a flange mode, the square installation plate is fixed on a sliding seat of the linear guide rails 10 through bolts, a gear is installed on an output shaft of the servo motor 8 with the encoder, and the gear is meshed with a rack which is fixed on the aluminum profile beam 11 and located between the two linear guide rails 10, so that transmission of a gear rack 9 is achieved; the drag chain support 7 is installed on the servo motor installation plate through a connecting plate in the horizontal direction by using a bolt, and the servo motor 8 with the encoder drives the drag chain support 7 and the photoelectric sensor 4 to walk in the horizontal direction through a gear rack 9.
The method for realizing the side-type non-contact round billet length measurement by adopting the measuring device comprises the following process steps:
a, starting length measurement, conveying a billet 1 to be measured to a stop area through a conveying roller way 2, and sending the running stop state of the billet roller way to a length measurement PLC by a control system of the conveying roller way 2, wherein the length measurement PLC adopts Siemens S7-1200 series PLC;
b, starting a servo motor, driving the servo motor through a servo driver, and driving the servo motor to drive the photoelectric sensor 4 to move from left to right at a constant speed by the servo driver; the moving speed of the photoelectric sensor 4 driven by the servo motor is 0.2m/s, and the system error is within 3 mm; the servo driver adopts Siemens V90 series;
c, detecting and recording the front end of the steel billet by the photoelectric sensor, changing a detection signal of the photoelectric sensor 4 from 0 to 1 after a light beam of the photoelectric sensor 4 touches the front end of the steel billet 1 to be detected, and triggering the PLC to record the current numerical value S1 of the servo motor encoder;
d, the photoelectric sensor detects and records the rear end of the billet and continuously moves to the rear end of the billet 1 to be detected, the detection signal of the photoelectric sensor 4 is changed from 1 to 0, the PLC is triggered to record the current position S2 of the servo motor,
e, calculating the length of the billet according to the difference between S2 and S1, and if the length of the billet is L, then L = S2-S1;
f, finishing the measurement and waiting for the next billet.
It should be understood that technical features not described in detail in the specification belong to the prior art. Although the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above embodiments, which are only illustrative and not restrictive, and those skilled in the art can make various modifications without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (3)
1. A side type non-contact round billet length measuring method is characterized by comprising the following process steps:
a, starting length measurement, conveying a steel billet to be measured to a stop area through a conveying roller way, and sending the stop running state of the steel billet roller way to a length measurement PLC by a control system of the conveying roller way;
b, starting a servo motor, and driving the servo motor to drive the photoelectric sensor to move from left to right at a constant speed through a servo driver;
c, detecting and recording the front end of the steel billet by the photoelectric sensor, changing a detection signal of the photoelectric sensor from 0 to 1 after a light beam of the photoelectric sensor touches the front end of the steel billet, and triggering the PLC to record the current servo motor encoder value S1;
d, detecting and recording the rear end of the steel billet by the photoelectric sensor, continuously moving to the rear end of the steel billet, changing a detection signal of the photoelectric sensor from 1 to 0, and triggering the PLC to record the current position S2 of the servo motor;
e, calculating the length of the billet according to the difference between S2 and S1, and if the length of the billet is L, then L = S2-S1;
f, finishing the measurement and waiting for the next billet.
2. The method for measuring the length of the side-type non-contact round billet according to claim 1, wherein the moving speed of the photoelectric sensor driven by the servo motor is 0.2m/s, and the system error is within 3 mm.
3. The measuring device for realizing the side type non-contact round billet length measuring method of claim 1 or 2 comprises a roller bed base, wherein a conveying roller bed is arranged on the roller bed base; the roller bed is characterized in that a base is arranged on one side of the roller bed base, and an aluminum profile cross beam is arranged on the base; the aluminum profile cross beam is provided with measuring equipment; the measuring equipment consists of a photoelectric sensor, an L-shaped sensor bracket, a cable drag chain and a drag chain bracket, wherein the photoelectric sensor is fixed on the L-shaped sensor bracket; the side surface of the aluminum profile beam is horizontally provided with two parallel linear guide rails, a servo motor with an encoder is fixed on a sliding seat of the linear guide rails, an output shaft of the servo motor with the encoder is provided with a gear, and the gear is meshed with a rack which is fixed on the aluminum profile beam and positioned between the two linear guide rails, so that gear-rack transmission is realized; a servo motor with an encoder drives the drag chain support and the photoelectric sensor to move in the horizontal direction through a gear rack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110316834.3A CN112985273A (en) | 2021-03-25 | 2021-03-25 | Side type non-contact round billet length measuring method and measuring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110316834.3A CN112985273A (en) | 2021-03-25 | 2021-03-25 | Side type non-contact round billet length measuring method and measuring device |
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| CN112985273A true CN112985273A (en) | 2021-06-18 |
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| CA2563703A1 (en) * | 2006-10-13 | 2008-04-13 | John Wright | Saw measuring device |
| JP2011174884A (en) * | 2010-02-25 | 2011-09-08 | Jfe Steel Corp | Method and device for measuring length of hot-rolled long material |
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| CN102589449A (en) * | 2011-01-07 | 2012-07-18 | 宝山钢铁股份有限公司 | Length measuring device of slab and measuring method |
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| CN204854691U (en) * | 2015-06-01 | 2015-12-09 | 衡阳镭目科技有限责任公司 | System for on line measurement high -speed conveying has cut continuous casting billet length |
| WO2019125080A1 (en) * | 2017-12-21 | 2019-06-27 | 주식회사 포스코 | Plate length measuring system and measuring method using same |
| CN111693007A (en) * | 2020-07-14 | 2020-09-22 | 中石化石油机械股份有限公司沙市钢管分公司 | Self-adaptive real-time length measuring device and calculation method for spiral welded pipe cutting |
| CN112129217A (en) * | 2019-06-25 | 2020-12-25 | 宝山钢铁股份有限公司 | Accurate positioning system and method for slab edge |
| CN112432617A (en) * | 2020-11-26 | 2021-03-02 | 中机试验装备股份有限公司 | Steel rail non-contact laser measuring platform |
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2021
- 2021-03-25 CN CN202110316834.3A patent/CN112985273A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2563703A1 (en) * | 2006-10-13 | 2008-04-13 | John Wright | Saw measuring device |
| JP2011174884A (en) * | 2010-02-25 | 2011-09-08 | Jfe Steel Corp | Method and device for measuring length of hot-rolled long material |
| KR20120071445A (en) * | 2010-12-23 | 2012-07-03 | 주식회사 포스코 | Apparatus and method for meassuring length of sheet bars |
| CN102589449A (en) * | 2011-01-07 | 2012-07-18 | 宝山钢铁股份有限公司 | Length measuring device of slab and measuring method |
| CN104279962A (en) * | 2014-10-30 | 2015-01-14 | 黑龙江中科诺晟自动化设备开发有限公司 | Pill case length measuring method based on optical signals and encoder signals |
| CN204854691U (en) * | 2015-06-01 | 2015-12-09 | 衡阳镭目科技有限责任公司 | System for on line measurement high -speed conveying has cut continuous casting billet length |
| WO2019125080A1 (en) * | 2017-12-21 | 2019-06-27 | 주식회사 포스코 | Plate length measuring system and measuring method using same |
| CN112129217A (en) * | 2019-06-25 | 2020-12-25 | 宝山钢铁股份有限公司 | Accurate positioning system and method for slab edge |
| CN111693007A (en) * | 2020-07-14 | 2020-09-22 | 中石化石油机械股份有限公司沙市钢管分公司 | Self-adaptive real-time length measuring device and calculation method for spiral welded pipe cutting |
| CN112432617A (en) * | 2020-11-26 | 2021-03-02 | 中机试验装备股份有限公司 | Steel rail non-contact laser measuring platform |
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Application publication date: 20210618 |