CN102001025A - Processing precision property online measurement device and method for super-heavy lathe - Google Patents
Processing precision property online measurement device and method for super-heavy lathe Download PDFInfo
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- CN102001025A CN102001025A CN 201010516913 CN201010516913A CN102001025A CN 102001025 A CN102001025 A CN 102001025A CN 201010516913 CN201010516913 CN 201010516913 CN 201010516913 A CN201010516913 A CN 201010516913A CN 102001025 A CN102001025 A CN 102001025A
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Abstract
The invention discloses a processing precision property online measurement device and a processing precision property online measurement method for a super-heavy lathe. Laser spot images are acquired by using a high-speed linear array image sensor, clear spot images are acquired from a group of acquired spot image sequence by using image recovery technology, sub-pixel central points of the spot images are identified by using correlation of pixel gray between the image sequences, and position information on the surface of a rotary workpiece can be effectively acquired by trigonometric imaging path calculation so that the technical defect that the conventional optical measurement method and the conventional optical measurement device cannot effectively acquire the position information on the surface of the rotary workpiece is overcome. Based on the acquired position information on the surface of the rotary workpiece, the developed measurement device is arranged on the heavy lathe; and after finishing a debugging calibration process, the measurement device can realize online on-site measurement of the processing dimension of the rotary workpiece on the heavy lathe, and meanwhile, the measurement system also has the function of positioning the processed workpiece.
Description
Technical field
The invention belongs to superduty machine tool capability detection technique field, relate to, particularly a kind of method and system that is used for the assessment of superduty machined into precision on-machine measurement with the method for light as the online detection rotating object of sensing means surface topography.
Background technology
In Aero-Space, large-scale mining industry machinery, Large Hydropower Station, in the process of ultra-large workpieces such as nuclear power plant equipment, the superduty lathe is one of its main equipments.Though domestic superduty lathe is in developing stage at present, the report of existing shaped article outlet.In superduty lathe research and development and use, be a quality control difficult problem to the measurement of ultra-large workpiece processing dimension.This is that as if the workpiece that is 5000mm with 10 rev/mins of diameters of the speed of mainshaft, the cutting linear velocity of lathe is greater than 100m/min because in the large-scale workpiece process, workpiece is in rotation status.Because the processing work size is big, machining is the process of a long-time continuous processing in addition, and it is very important that the wearing and tearing of process tool are controlled for crudy.The size of online detection processing work not only helps the crudy control of ultra-large workpiece, and helps detecting assembly changes of properties in machine tooling workpiece process such as machine tool, provides foundation for improving Machine Tool design.For the dimensional measurement of rotational workpieces, contact measurement method is inapplicable.And in the existing contactless workpiece processing dimension measuring method, measuring method is a kind of effective method.Existing measuring method and equipment owing to can not obtain active data, are not suitable for the on-line measurement of superduty machine tooling workpiece under lathe high-speed line cutting speed.
Summary of the invention
At the demand of the online detection of superduty machined into workpiece and the defective or the deficiency of prior art creation, the object of the present invention is to provide a kind of superduty machined into precision characteristic on-machine measurement apparatus and method that can be used for, this method is reliable for the rotational workpieces image data, can be used for the preceding location of workpiece processing, the on-line measurement of process, after the processing at machine testing.
In order to realize above-mentioned task, the present invention takes following technical solution:
A kind of superduty machined into precision characteristic on-machine measurement device comprises light-source system, light spot image acquisition system and data handling system; Described light-source system includes LASER Light Source, convergent lens, collimation lens and collimation lens are arranged on the light path of LASER Light Source successively, they all are installed in the drum type housing, the drum type housing is fixed on fore-stock and the after-poppet, fore-stock and after-poppet are fixed on and install on the housing by preceding left screw, preceding right screw, the right screw of left screw in back and back, have spring to support between fore-stock housing and after-poppet and the housing, LASER Light Source sends outgoing beam and enter the light spot image acquisition system by folded light beam after the reflection of large-scale workpiece surface;
The light spot image acquisition system comprises optical filter, imaging len, is fixed into as lens holder, is fixed into rotating shaft mechanism and line array CCD as lens holder, optical filter is installed on the imaging len, imaging len is installed in and is fixed on the picture lens holder, and anchor clamps are fixed on the rotating mechanism 15;
Data handling system comprises data acquisition and treatment circuit and interface, and interface and interface, interface connect data acquisition and treatment circuit and LASER Light Source respectively, and interface connects data acquisition and control circuit and line array CCD, interface jockey and computer.
A kind of method of using as above-mentioned device, this method comprises the steps:
Step 1, with above-mentioned measurement mechanism by fixed support be fixed on one vertically the motion guide rail on;
Step 2, the guide rail of step 1 is fixed on the base of tool of heavy-duty engine lathe, make the direction of motion of guide rail be in vertical direction and with cutter processing direction of advance vertical;
Step 3, the pitching of adjustment measurement mechanism on fixed support, the plane that measurement mechanism outgoing beam and folded light beam are formed is vertical with the linear velocity direction of surface of the work motion;
Step 4, to be clamped in the column type workpiece that machines on the heavy machine tool as measuring object, measurement mechanism is moved up and down along guide rail, seek the position of the minimum of a value of the data that measurement mechanism measures, this position is exactly to measure the position that heavy machine tool main axis rotation center line is passed through on irradiating light beam and the formed plane of folded light beam.Measurement mechanism is fixed on this position;
Step 5, be measuring object with the geometric parameter of processing work, by machine tool seat feed system, calibrate the guide rail of measurement mechanism datum mark with respect to lathe, the supporting plate and the base of tool, the relative position coordinates of the cylindrical-coordinate system that main shaft constitutes is finished the demarcation of measurement mechanism on lathe;
Step 6, when measurement mechanism on lathe during online on-position measure, at first measured value is separated the value that is counted as with respect to the measurement mechanism measuring basis, the measurement mechanism benchmark that the back is demarcated according to measuring system is separated measured value the coordinate figure that is counted as with respect to the lathe cylindrical-coordinate system with respect to the position coordinates of lathe cylindrical-coordinate system.
The present invention uses the high speed linear array imageing sensor and gathers representation of laser facula, by one group of light spot image sequence application image recovery technology obtaining is obtained the hot spot picture rich in detail, the correlation of pixel grey scale identifies the sub-pix central point of light spot image between the application image sequence again, resolve by the trigonometry imaging optical path, can obtain the positional information on rotational workpieces surface effectively, thereby overcome existing measuring method and installed the technological deficiency that effectively to obtain the rotating machined workpiece surface position information.
The rotational workpieces surface position information of the present invention to obtain, the measurement mechanism of being developed is installed on the heavy-duty engine lathe, after finishing the debugging calibration process, can realize the online on-position measure of heavy-duty engine lathe rotational workpieces processing dimension, this measuring system also has the positioning function to processing work simultaneously.
Description of drawings
Fig. 1 is the superduty machined into precision characteristic on-machine measurement device schematic diagram based on optical sensing methods.
Number in the figure: 1, LASER Light Source, 2, convergent lens, 3, collimation lens 1,4, collimation lens 2,5, the drum type housing of light source part is installed, 6, support 1,7, support 2,8, spring screw device 1,9, spring screw device 2,10, spring screw device 3,11, spring screw device 4,12, optical filter, 13, imaging len, 14, the fixing anchor clamps of imaging len, 15, be fixed into the rotating shaft mechanism of picture lens holder, 16, line array CCD, 17, data acquisition and treatment circuit, 18, housing is installed, 19, interface 1,20, interface 2,21, interface 3,22, outgoing beam, 23, folded light beam, 24, the large-scale workpiece surface.
Fig. 2 is the method schematic diagram of superduty machined into precision characteristic on-machine measurement.
Label is wherein represented respectively: 25, processed large-scale workpiece, 26, heavy-duty engine lathe guide rail platform, 27, the tool feeding case, 28, toolframe, 29, cutter, 30, guide rail, 31, fixed support, 32, measurement mechanism of the present invention, 33, measure light path
The specific embodiment
Referring to Fig. 1, the present invention relates to based on the superduty machined into precision characteristic on-machine measurement device of optical sensing methods with laser beam that semiconductor laser sent behind convergent lens, obtain in the poly-lens front surface 100～500mm scope of measurement category defection just through collimation lens set again, each length is in laser beam waist 25mm scope, and lasing beam diameter is less than 40um.Laser beam disturbs the light wave composition through the surface of the work reflection after optical filter is removed, by the imaging len imaging.Optical filter transmitted light wave frequency range is consistent with the frequency of light wave scope of the semiconductor laser that is adopted.Laser facula is used the high speed linear array imageing sensor and is received.Can obtain one group of light spot image sequence by the high speed linear array imageing sensor, the application image recovery technology obtains the hot spot picture rich in detail, and the correlation of pixel grey scale identifies the sub-pix central point of light spot image between the application image sequence again.By demarcating and calculate the geometrical relationship between irradiating light beam and the folded light beam, can obtain the corresponding relation of surface of the work locus and line scan image sensor location of pixels.In measuring process, put in that line scan image sensor is upper according to laser facula, can calculate surface of the work for the change in location of demarcating benchmark.
To use above-mentioned superduty machined into precision characteristic on-machine measurement device is fixed on the machine tool seat, obtain device with respect to guide rail by demarcating to adjust, the base of tool, the reference coordinate of main shaft cylindrical-coordinate system, again the positional information of the surface of the work of measurement device is resolved in the cylindrical-coordinate system, realized workpiece processing prelocalization, the online detection in the process, the tool wear at machine testing and in of processing back workpiece to process, the detection of factors such as vibration.
The present invention can adjust the pitching and the height of drum type housing 5 by adjusting collimation lens 3 and collimation lens 4 adjustment laser beam waist positions by left screw 8, preceding right screw 9, the right screw 11 of left screw 10 in back and back before adjusting.Stationary fixture 14 by rotation installation imaging len 13 is adjusted to as the angle between lens axis and the line scan image sensor simultaneously, make imaging system satisfy the Scheimpflug condition, change the measuring basis position of optical sensing methods simultaneously, to adapt to requirement without measurement category.
Referring to Fig. 2, the installing component of superduty machined into precision characteristic on-machine measurement device 32 on heavy machine tool of the present invention's research and development comprises guide rail 30 and fixed support 31.Measurement mechanism 32 is fixed on the fixed support 31, and fixed support 31 is fixed on the slide block of guide rail 30, can drive measurement mechanism 32 in movement in vertical direction.When measurement mechanism 32 is installed, vertical with the linear velocity direction of surface of the work motion by the plane that adjustment forms measurement mechanism 32 outgoing beams and folded light beam.
At measurement mechanism 32 after installation on the heavy-duty engine lathe, by moving up and down along guide rail 30, seek the position of the minimum of a value of the data that measurement mechanism 32 measures, this position is exactly to measure the plane that irradiating light beam and folded light beam form and the position of heavy machine tool main axis rotation central lines.
By above-mentioned installation and debug process, measurement mechanism is in conjunction with machine tool guideway, the supporting plate and the base of tool, and the cylindrical-coordinate system that main shaft constitutes forms a system of in the machine tooling scope surface of the work position being measured.This measuring system by with data solver that measurement mechanism is surveyed under the cylindrical-coordinate system of lathe itself, realize the location of workpiece and the online on-position measure of processing geometric parameter.
Claims (2)
1. a superduty machined into precision characteristic on-machine measurement device comprises light-source system, light spot image acquisition system and data handling system (17); It is characterized in that, described light-source system includes LASER Light Source (1), convergent lens (2) is arranged on the light path of LASER Light Source (1) successively, collimation lens (3) and collimation lens (4), they all are installed in the drum type housing (5), drum type housing (5) is fixed on fore-stock (6) and the after-poppet (7), fore-stock (6) and after-poppet (7) are fixed on to be installed on the housing (18), have spring to support between fore-stock (6) housing (18) and after-poppet (7) and the housing (18), LASER Light Source (1) sends outgoing beam (22) and enter the light spot image acquisition system by folded light beam (23) after large-scale workpiece surface (24) reflection;
The light spot image acquisition system comprises optical filter (12), imaging len (13), is fixed into picture lens holder (14), is fixed into rotating shaft mechanism (15) and line array CCD (16) as lens holder, optical filter (12) is installed on the imaging len (13), imaging len (13) is installed in and is fixed on the picture lens holder (14), and anchor clamps (14) are fixed on the rotating mechanism 15;
Data handling system comprises data acquisition and treatment circuit (17) and interface (19), interface (20) and interface (21), interface (21) connects data acquisition and treatment circuit (17) and LASER Light Source (1) respectively, interface (20) connects data acquisition and control circuit and line array CCD, interface (19) jockey and computer.
2. a method of using device as claimed in claim 1 is characterized in that this method comprises the steps:
Step 1, with above-mentioned measurement mechanism by fixed support be fixed on one vertically the motion guide rail on;
Step 2, the guide rail of step 1 is fixed on the base of tool of heavy-duty engine lathe, make the direction of motion of guide rail be in vertical direction and with cutter processing direction of advance vertical;
Step 3, the pitching of adjustment measurement mechanism on fixed support, the plane that measurement mechanism outgoing beam and folded light beam are formed is vertical with the linear velocity direction of surface of the work motion;
Step 4, to be clamped in the column type workpiece that machines on the heavy machine tool as measuring object, measurement mechanism is moved up and down along guide rail, seek the position of the minimum of a value of the data that measurement mechanism measures, this position is exactly to measure the position that heavy machine tool main axis rotation center line is passed through on irradiating light beam and the formed plane of folded light beam.Measurement mechanism is fixed on this position;
Step 5, be measuring object with the geometric parameter of processing work, by machine tool seat feed system, calibrate the guide rail of measurement mechanism datum mark with respect to lathe, the supporting plate and the base of tool, the relative position coordinates of the cylindrical-coordinate system that main shaft constitutes is finished the demarcation of measurement mechanism on lathe;
Step 6, when measurement mechanism on lathe during online on-position measure, at first measured value is separated the value that is counted as with respect to the measurement mechanism measuring basis, the measurement mechanism benchmark that the back is demarcated according to measuring system is separated measured value the coordinate figure that is counted as with respect to the lathe cylindrical-coordinate system with respect to the position coordinates of lathe cylindrical-coordinate system.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814512A (en) * | 2012-08-24 | 2012-12-12 | 沈阳黎明航空发动机(集团)有限责任公司 | On-line measuring method for radials profile of compressor disc-like part of engine |
| CN103846737A (en) * | 2012-11-30 | 2014-06-11 | 财团法人工业技术研究院 | Calibration device and compensation method for multi-axis machine |
| CN104772656A (en) * | 2015-04-02 | 2015-07-15 | 西安交通大学 | Online measuring system and method for rotary part of lathe |
| CN105033751A (en) * | 2015-06-24 | 2015-11-11 | 中国科学院光电技术研究所 | Online detection machining device and method for convex cone mirror |
| CN105139005A (en) * | 2015-09-23 | 2015-12-09 | 无锡市中捷减震器有限公司 | Detection device with workpiece identification and marking functions |
| CN108036724A (en) * | 2017-12-01 | 2018-05-15 | 武汉万集信息技术有限公司 | A kind of dimension of object measuring method and device |
| TWI640388B (en) * | 2017-11-10 | 2018-11-11 | 財團法人工業技術研究院 | Servo tuning device and servo tuning method |
| CN110645908A (en) * | 2019-08-16 | 2020-01-03 | 广州瑞松北斗汽车装备有限公司 | Vehicle body appearance defect detection method and detection system |
| WO2021184163A1 (en) * | 2020-03-16 | 2021-09-23 | 上海芯歌智能科技有限公司 | Laser measurement apparatus |
| CN114411428A (en) * | 2021-12-29 | 2022-04-29 | 浙江大学台州研究院 | Closed-loop control device and method based on point laser cloth seam detection |
| CN118180994A (en) * | 2024-05-15 | 2024-06-14 | 黑龙江交通职业技术学院 | Machine tool positioning method and positioning device |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814512A (en) * | 2012-08-24 | 2012-12-12 | 沈阳黎明航空发动机(集团)有限责任公司 | On-line measuring method for radials profile of compressor disc-like part of engine |
| CN103846737B (en) * | 2012-11-30 | 2016-05-04 | 财团法人工业技术研究院 | Calibration device and compensation method for multi-axis machine |
| CN103846737A (en) * | 2012-11-30 | 2014-06-11 | 财团法人工业技术研究院 | Calibration device and compensation method for multi-axis machine |
| CN104772656A (en) * | 2015-04-02 | 2015-07-15 | 西安交通大学 | Online measuring system and method for rotary part of lathe |
| CN104772656B (en) * | 2015-04-02 | 2017-04-26 | 西安交通大学 | Online measuring system and method for rotary part of lathe |
| CN105033751A (en) * | 2015-06-24 | 2015-11-11 | 中国科学院光电技术研究所 | Online detection machining device and method for convex cone mirror |
| CN105139005A (en) * | 2015-09-23 | 2015-12-09 | 无锡市中捷减震器有限公司 | Detection device with workpiece identification and marking functions |
| TWI640388B (en) * | 2017-11-10 | 2018-11-11 | 財團法人工業技術研究院 | Servo tuning device and servo tuning method |
| CN108036724A (en) * | 2017-12-01 | 2018-05-15 | 武汉万集信息技术有限公司 | A kind of dimension of object measuring method and device |
| CN110645908A (en) * | 2019-08-16 | 2020-01-03 | 广州瑞松北斗汽车装备有限公司 | Vehicle body appearance defect detection method and detection system |
| WO2021184163A1 (en) * | 2020-03-16 | 2021-09-23 | 上海芯歌智能科技有限公司 | Laser measurement apparatus |
| CN114411428A (en) * | 2021-12-29 | 2022-04-29 | 浙江大学台州研究院 | Closed-loop control device and method based on point laser cloth seam detection |
| CN114411428B (en) * | 2021-12-29 | 2023-08-29 | 浙江大学台州研究院 | Closed-loop control device and method based on spot laser cloth seam detection |
| CN118180994A (en) * | 2024-05-15 | 2024-06-14 | 黑龙江交通职业技术学院 | Machine tool positioning method and positioning device |
| CN118180994B (en) * | 2024-05-15 | 2024-07-23 | 黑龙江交通职业技术学院 | Machine tool positioning method and positioning device |
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