CN106647621A - Numerical control machining positioning method and system for precious metal - Google Patents
Numerical control machining positioning method and system for precious metal Download PDFInfo
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- CN106647621A CN106647621A CN201611111409.6A CN201611111409A CN106647621A CN 106647621 A CN106647621 A CN 106647621A CN 201611111409 A CN201611111409 A CN 201611111409A CN 106647621 A CN106647621 A CN 106647621A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/402—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for positioning, e.g. centring a tool relative to a hole in the workpiece, additional detection means to correct position
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/37—Measurements
- G05B2219/37404—Orientation of workpiece or tool, surface sensor
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- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Machine Tool Sensing Apparatuses (AREA)
Abstract
The invention discloses a numerical control machining positioning method for precious metal, and the method comprises three steps: image collection, image processing and analysis, and result output. Meanwhile, the invention also discloses a numerical control machining positioning system for precious metal, and the system comprises a mechanical assembly, a CCD module group, an industrial control computer, and a numerical control system. The system consists of control software and a mechanical execution element. The software controls the mechanical operation to guide a CCD camera to carry out the non-contact detection, carries out the processing and calculation of an image collected by the CCD and guides a machine tool to locate a workpiece machining origin point. Machine vision can be used for carrying out the long-time measurement, analysis and recognition tasks. The system carries out the processing and analysis of the obtained image through the compiling of an image processing program, can obtain the steering angle positioning value and a linear axis positioning value of the machine tool, is high in detection efficiency, and is easy to achieve the modular integration. According to the invention, the system employs a modular design, is compact in structure, is convenient to install, is simple in control, and employs an IP65-level waterproof design.
Description
Technical field
The present invention relates to noble metal manufacture field, refers in particular to a kind of noble metal digital control processing localization method and system.
Background technology
Noble metal numerical control machining center special at present is all that artificial operation is completed to the positioning and a point middle link of workpiece, by
There is very big randomness in artificial operation, the quality for causing product is difficult control, and inefficiency.It is this to be positioned manually and divide
In method need the skilled operation of workman, the training to workman to need the long period, particularly to needing the work of repeated clamping
Part is positioned, it is impossible to meet production technology demand.
The content of the invention
The technical problem to be solved is to provide for a kind of side for enabling Digit Control Machine Tool to realize point middle positioning automatically
Method and system.
In order to solve above-mentioned technical problem, the invention discloses a kind of noble metal digital control processing localization method, the method bag
Image acquisition step is included, using CCD camera the location drawing picture information of workpiece of the clamping on lathe is collected；
Image processing and analysis step, sends the image information that CCD camera is obtained to industrial computer, in industrial computer at image
Reason program is contrasted according to the workpiece product standard template being previously set, and calculates the deviant of workpiece；
Data output step, by image processing program process obtained by deviant feed back to digital control system and control lathe move
Move cutting point to be processed.
Further, the standard form is the workpiece image template that alignment system is obtained in workpiece origin state.
Further, described image is processed with analytical procedure, and the image for obtaining is entered by working out image processing program
Row analyzing and processing, it is relative under different coordinates including the extraction to workpiece image edge, the determination of workpiece centre position, workpiece
The calculating of changes in coordinates and the determination of cutting point.
Further, in the data output step, workpiece cutting point offset coordinates are exported to digital control system, digital control system
Data are processed according to the macroprogram of itself, corrects the Cutter coordinate system of noble metal numerical control machine tool, and control lathe
Corresponding kinematic axis action.
Further, described image is processed with analytical procedure, and the extraction at the workpiece image edge is the figure to obtaining
Detected that the edge strength of each pixel of detection one-dimensional profile, when edge strength is more than minimum strength, is examined in the edge of picture
An edge is measured, wherein, minimum can be specified using the minimum edge intensity or threshold level parameter in image processing program
Intensity.
Further, described image is processed with analytical procedure, and the extraction at the workpiece image edge is using one-dimensional
Marginal position on edge indicator function detection workpiece profile, detects the optimal edge of workpiece in a window, by one
The individual angular range specified, detects workpiece features, to determine position and the angle of workpiece.
Further, in the data output step, also include that the workpiece according to corresponding to acquired image judges it is
No type, the specification for meeting plan processing workpiece, when not meeting, sends alarm, processes abnormal, changes workpiece and reenters
Image acquisition step；When these segmentation symbols match, deviant is fed back into digital control system and controls lathe and move to cutting point to be processed.
Further, the deviant is fed back to after digital control system, and digital control system is adjusted machining coordinate, calibration work
Part, and state-detection is carried out to the workpiece after calibration, when work status are unsatisfactory for processing conditions, send warning, process abnormal,
And reenter image acquisition step；When work status meet processing conditions, digital control system starts tool sharpening.
On the basis of above-mentioned localization method, the invention also discloses a kind of noble metal digital-control processing system, the system
Including mechanical component, CCD modules, industrial computer and digital control system, the CCD modules are installed on mechanical component, CCD modules and work
Data are connected between control machine, the picture signal that CCD modules are collected are received by industrial computer, by described image processing routine to image
Signal processing and analyzing, and find out and be sent to behind workpiece cutting point position digital control system, and control machine tool motion.
Further, the CCD modules are made up of CCD camera and active light source, and the mechanical component forms a capsul
Body, the CCD modules are located in seal casinghousing, and the bottom of the seal casinghousing is provided with rotatory sealing door, when the rotatory sealing door
During opening, workpiece can be entered in the closed shell, and the light source is moved at workpiece, and CCD camera is taken pictures again and obtained
Positioning image.
The present invention program adopts non-contact measurement, for observer and the person of being observed are all without producing any damage, from
And improve the reliability of system.Long-time stable works, and the mankind are difficult to long-time and same target is observed, and machine vision
Then can for a long time measure, analyze and identification mission.Cleaning Principle is simple with process, by working out image processing program pair
The image of acquisition carries out Treatment Analysis and just can obtain lathe corner locator value and linear axis locator value, and detection efficiency is high and is easy to real
Existing modularization is integrated.The mechanical device of the present invention adopts modular designs, and compact conformation is easy for installation, and control is simple, IP65 levels
Other waterproofing design.
Description of the drawings
The concrete structure of the present invention is described in detail in detail below in conjunction with the accompanying drawings
Fig. 1 is the logic chart of noble metal digital control processing alignment system operation of the present invention；
Fig. 2 is noble metal digital control processing alignment system mechanical component of the present invention and CCD modular structure schematic diagrames.
In figure, in figure, including lower baffle plate 1,50R red circles light source 2, light source install panel beating 3, left shrouding 4, CCD camera
5th, camera lens fixation auxiliary 6, upper sealing plate 8, gas are vertical can twin shaft cylinder 9, base plate 10, right shrouding 11, cylinder fixation panel beating 12, revolution gas
Cylinder 13, cylinder contiguous block 14, hermatic door 15.
Specific embodiment
To describe technology contents of the invention, structural feature in detail, purpose and effect being realized, below in conjunction with embodiment
And coordinate accompanying drawing to be explained in detail.
With reference to Fig. 1, when needing to be processed a ring workpiece, start each equipment, run corresponding system, first
Need to position workpiece, it is determined that the cutting point of processing, can collect ring work of the clamping on lathe first with CCD camera
The location drawing picture information of part；
Then by CCD camera obtain ring image information send industrial computer to, in industrial computer image processing program according to
The ring workpiece product standard template being previously set is contrasted, and calculates the deviant of ring workpiece.Wherein, standard form
For the ring workpiece image template that alignment system is obtained in workpiece origin state；
Finally, by image processing program process obtained by the deviant of ring workpiece feed back to digital control system and control lathe
Move to cutting point to be processed.
Preferably, in the ring workpiece image process and analytical procedure, by working out image processing program to acquisition
Ring image is analyzed process, including the extraction to ring workpiece image edge, determination, the ring of ring workpiece centre position
The calculating and the determination of cutting point of relative coordinate change of the workpiece under different coordinates.
Preferably, described image is processed with analytical procedure, and the extraction at the ring workpiece image edge is to obtaining
The edge of image detected, detects the edge strength of each pixel of one-dimensional profile, when edge strength is more than minimum strength,
An edge being detected, wherein, can be specified most using the minimum edge intensity or threshold level parameter in image processing program
Small intensity.
Preferably, described image is processed with analytical procedure, and the extraction at the ring workpiece image edge is using one-dimensional
Edge indicator function detection ring workpiece profile on marginal position, detect the optimal side of ring workpiece in a window
Edge, by an angular range specified, detects ring workpiece features, to determine position and the angle of ring workpiece.
In the data output step, also include the ring according to corresponding to the ring workpiece image for being gathered judges it
Workpiece whether meet plan processing in ring workpiece type, specification, when carry out comparing calculation find do not meet when, then system meeting
Alarm is sent, into abnormal program is processed, while changing ring workpiece and reentering image acquisition step, image procossing and divide
Analysis step, data output step etc., that is, change ring workpiece and repeat the positioning of ring workpiece.When the ring workpiece figure for being gathered
In as meeting plan processing when the type and specification of ring workpiece, the deviant obtained by Treatment Analysis is just fed back to number by system
Control system simultaneously carries out follow-up process.
In follow-up process, digital control system is processed ring workpiece variation value with reference to the macroprogram of itself, and is rectified
The Cutter coordinate system of positive noble metal numerical control machine tool, calibration is installed in the ring workpiece on lathe.After having calibrated ring workpiece,
Also need to carry out the situation after ring workpiece alignment one detection, that is, reuse CCD camera and the ring workpiece after calibration is entered
Row IMAQ, image processing and analysis, and after being calibrated ring workpiece new deviant, if the deviant is a certain
In the range of regulation, that is, judge that the ring workpiece after calibration meets processing conditions, CNC digital control systems start and control cutter to be carried out
The processing of ring and subsequent step.If the deviant exceeds the prescribed limit, judge that the ring workpiece after calibration is discontented with
Sufficient processing conditions, CNC digital control systems just do not start the machining of ring workpiece, but send alarm, and it is abnormal to enter process
Program, finally comes back to again image acquisition step, and according to previous localization method ring workpiece is positioned again.
On the basis of above-mentioned localization method, the invention also discloses a kind of noble metal numerical control for realizing said method adds
Work system, the system includes mechanical component, CCD modules, industrial computer and digital control system.CCD modules include CCD camera and light source,
Arrangements of cameras gathers image in the processing district of lathe using light field LED diffusing reflection frontlighting modes.Because processing district is in processing
During can produce substantial amounts of mist of oil, specially devise isolation mist of oil, protect the mechanical component containment envelope of camera and light source.Adopt
Linked with PC by RS232 communication interfaces as host computer with digital control system, gigabit Ethernet is adopted between PC and camera
GigE Vision standards connect, and drive and adopt UPD/IP agreements, using completely DMA controls.CCD collections are received by industrial computer
The picture signal for arriving, by the way that described image processing routine is to picture signal process and analyzes, and finds out behind workpiece cutting point position
Digital control system is sent to, and controls machine tool motion processing.
With reference to shown in Fig. 2, mechanical component is a sealable housing, and CCD modules include CCD camera 5 and light source, in housing
Portion can form a cavity, and CCD camera 5 is fixedly connected in the cavity, and light source also is located in the cavity, while the light source position
In the lower section of CCD camera 5, for CCD camera collection image information of taking pictures enough care brightness is provided.The bottom of housing includes one
Opening, one is provided with opening can be by the black box of the cavity airtight.Black box includes a hermatic door 15, the hermatic door 15
Positioned at the bottom of housing, that is, under the opening and the opening can be sealed and to form one with the housing complete close
Envelope cavity.This design mesh ground be the confined space for providing a safety for the part in housing, so as to reach it is grease proofing, dust-proof,
The protection purpose of waterproof.Black box also includes a drive mechanism, and drive mechanism includes rotary cylinder 13, and the rotary cylinder 13 leads to
Cross cylinder and fix the outside that panel beating 12 is fixed on housing, while the rotary cylinder 13 is connected with a cylinder contiguous block 14, the cylinder
Contiguous block 14 is connected with the hermatic door 15 again, and then controls hermatic door rotating folding.The alignment lenses of the CCD camera 5 are erected
Nogata is to and straight down, while fix auxiliary 6 by camera lens be fixed on CCD camera 5 in the housing.The light source edge
Vertical direction liftable is arranged.Simultaneously the light source is preferably 50R red circles light source 2.The light source of annular, can make quilt under illumination
At workpiece without dim spot, without dead angle, identical brightness is obtained everywhere, improve the quality of gathered positioning image.It is described
Vertically be fixedly installed cylinder in housing, the cylinder preferably for gas it is vertical can twin shaft cylinder 9, the 50R redness ring
Shape light source 2 installs the bottom that panel beating 3 is fixed on the cylinder by light source, and the 50R red circles light source 2 can be with piston rod
Motion is vertically moved up and down.The housing includes a lower block for limiting the range of movement of 50R red circles light source 2
Plate 1, the lower baffle plate 1 is located at the bottom of the housing, and the lower baffle plate 1 is provided with opening, and the opening is available for collected positioning letter
Breath workpiece is entered in the cavity.The housing is overall by upper sealing plate 8, the lower baffle plate 1, left shrouding 4, right shrouding 11, front envelope
Plate, base plate 10, so as to form a cavity in the housing, are provided with opening around combining at the lower baffle plate 1, described close
Closure door 15 be located at the housing bottom and can be by housing seal.
The present invention is made up of control software and mechanical executive component, is entered by software controlled mechanical motion guiding CCD camera
The image that CCD is gathered is processed and calculated by row non-contact detection, software, guides lathe to position the side of work pieces process origin
Method.This programme for observer and the person of being observed are all without any damage is produced, so as to improve the reliability of system.Long-time is steady
Fixed work, the mankind are difficult to long-time and same target are observed, and machine vision then can measure for a long time, analyze and
Identification mission.Cleaning Principle is simple with process, carries out Treatment Analysis to the image for obtaining by establishment image processing program and just may be used
Obtain lathe corner locator value and linear axis locator value, detection efficiency is high and to be easily achieved modularization integrated.The machinery of the present invention
Device adopts modular designs, and compact conformation is easy for installation, and control is simple, the waterproofing design of IP65 ranks.Present invention control simultaneously
Processing procedure sequence algorithm is unique, and operation is succinct, stable, with erroneous judgement early warning mechanism.
Herein, up, down, left, right, before and after only represents its relative position and does not indicate that its absolute position.The foregoing is only
Embodiments of the invention, not thereby limit the scope of the claims of the present invention, every utilization description of the invention and accompanying drawing content institute
The equivalent structure or equivalent flow conversion of work, or other related technical fields are directly or indirectly used in, it is included in the same manner
In the scope of patent protection of the present invention.
Claims (10)
1. a kind of noble metal digital control processing localization method, it is characterised in that：
Including image acquisition step, using CCD camera the location drawing picture information of workpiece of the clamping on lathe is collected；
Image processing and analysis step, sends the image information that CCD camera is obtained to industrial computer, image procossing journey in industrial computer
Sequence is contrasted according to the workpiece product standard template being previously set, and calculates the deviant of workpiece；
Data output step, by image processing program process obtained by deviant feed back to digital control system and control lathe and move to
Cutting point is processed.
2. noble metal digital control processing localization method as claimed in claim 1, it is characterised in that：The standard form exists for workpiece
The image template that alignment system is obtained during workpiece origin state.
3. noble metal digital control processing localization method as claimed in claim 2, it is characterised in that：Described image process and analysis step
In rapid, process is analyzed to the image for obtaining by working out image processing program, including the extraction to workpiece image edge, work
The calculating and the determination of cutting point of relative coordinate change of determination, the workpiece of part center under different coordinates.
4. noble metal digital control processing localization method as claimed in claim 3, it is characterised in that：In the data output step,
Workpiece cutting point offset coordinates are exported to digital control system, digital control system is processed data according to the macroprogram of itself, corrected
The Cutter coordinate system of noble metal numerical control machine tool, and control the corresponding kinematic axis action of lathe.
5. noble metal digital control processing localization method as claimed in claim 4, it is characterised in that：Described image process and analysis step
In rapid, the extraction at the workpiece image edge is that the edge of the image to obtaining is detected, detects each picture of one-dimensional profile
The edge strength of element, when edge strength is more than minimum strength, detects an edge, wherein, image processing program can be used
In minimum edge intensity or threshold level parameter specifying minimum strength.
6. noble metal digital control processing localization method as claimed in claim 4, it is characterised in that：Described image process and analysis step
In rapid, the extraction at the workpiece image edge is that the marginal position on workpiece profile is detected using one-dimensional edge indicator function,
The optimal edge of workpiece, by an angular range specified, detects workpiece features in one window of detection, to determine
The position of workpiece and angle.
7. the noble metal digital control processing localization method as described in any one of claim 1-6, it is characterised in that：The data output
In step, also include whether the workpiece according to corresponding to acquired image judges it meets the type of plan processing workpiece, rule
Lattice, when not meeting, send alarm, process abnormal, change workpiece and reenter image acquisition step；When these segmentation symbols match, will be inclined
Shifting value feeds back to digital control system and controls lathe and move to cutting point to be processed.
8. noble metal digital control processing localization method as claimed in claim 7, it is characterised in that：The deviant feeds back to numerical control
After system, also including digital control system adjustment machining coordinate, calibration workpiece, and state-detection is carried out to the workpiece after calibration, work as work
When part state is unsatisfactory for processing conditions, sends warning, process abnormal, and reenter image acquisition step；When work status are expired
During sufficient processing conditions, digital control system starts tool sharpening.
9. a kind of noble metal digital-control processing system, it is characterised in that：Including mechanical component, CCD modules, industrial computer and numerical control system
System, the CCD modules are installed on mechanical component, and CCD modules are connected with data between industrial computer, and by industrial computer CCD modules are received
The picture signal for collecting, by the way that described image processing routine is to picture signal process and analyzes, and finds out workpiece cutting point position
Postpone and be sent to digital control system, and control machine tool motion.
10. noble metal digital-control processing system as claimed in claim 9, it is characterised in that：The CCD modules by CCD camera and
Active light source is constituted, and the mechanical component forms a seal casinghousing, and the CCD modules are located in seal casinghousing, the capsul
The bottom of body is provided with rotatory sealing door, and when the rotatory sealing door is opened, workpiece can be entered in the closed shell, the light source
It is moved at workpiece, CCD camera is taken pictures again and obtained positioning image.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611111409.6A CN106647621A (en) | 2016-12-06 | 2016-12-06 | Numerical control machining positioning method and system for precious metal |
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| CN201611111409.6A CN106647621A (en) | 2016-12-06 | 2016-12-06 | Numerical control machining positioning method and system for precious metal |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107160241A (en) * | 2017-06-14 | 2017-09-15 | 沈阳机床（东莞）智能装备有限公司 | A kind of vision positioning system and method based on Digit Control Machine Tool |
| CN107436586A (en) * | 2017-09-20 | 2017-12-05 | 张家港沙工科技服务有限公司 | A kind of stock-removing machine control software |
| CN108388201A (en) * | 2018-04-17 | 2018-08-10 | 潍坊学院 | A kind of numerically-controlled machine tool detects early warning system and its operation method automatically |
| CN109521728A (en) * | 2019-01-10 | 2019-03-26 | 江苏匠准数控机床有限公司 | A kind of numerically-controlled machine tool automatic seeking point processing technology |
| CN109765841A (en) * | 2019-01-09 | 2019-05-17 | 西北工业大学 | The space-time mapping method of online monitoring data and part Working position |
| CN110355671A (en) * | 2019-06-27 | 2019-10-22 | 东莞市德普特电子有限公司 | The processing method of borehole in a kind of LCD screen |
| CN110695770A (en) * | 2019-10-21 | 2020-01-17 | 上海维宏电子科技股份有限公司 | Visual positioning calibration method and corresponding numerical control machining method |
| CN110728655A (en) * | 2019-09-06 | 2020-01-24 | 重庆东渝中能实业有限公司 | Machine vision-based numerical control machine tool workpiece abnormity detection method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109765841A (en) * | 2019-01-09 | 2019-05-17 | 西北工业大学 | The space-time mapping method of online monitoring data and part Working position |
| CN109521728A (en) * | 2019-01-10 | 2019-03-26 | 江苏匠准数控机床有限公司 | A kind of numerically-controlled machine tool automatic seeking point processing technology |
| CN110355671A (en) * | 2019-06-27 | 2019-10-22 | 东莞市德普特电子有限公司 | The processing method of borehole in a kind of LCD screen |
| CN110728655A (en) * | 2019-09-06 | 2020-01-24 | 重庆东渝中能实业有限公司 | Machine vision-based numerical control machine tool workpiece abnormity detection method and device |
| CN110695770A (en) * | 2019-10-21 | 2020-01-17 | 上海维宏电子科技股份有限公司 | Visual positioning calibration method and corresponding numerical control machining method |
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