CN110470349A - A kind of precision CNC converted products quality determining method - Google Patents
A kind of precision CNC converted products quality determining method Download PDFInfo
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- CN110470349A CN110470349A CN201910890909.1A CN201910890909A CN110470349A CN 110470349 A CN110470349 A CN 110470349A CN 201910890909 A CN201910890909 A CN 201910890909A CN 110470349 A CN110470349 A CN 110470349A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
The invention discloses a kind of precision CNC converted products quality determining methods, including following quality inspection steps, S1, prepare detection instrument: accurate CNC converted products, CCD camera system, three coordinate measuring machine, rotating platform, electronic balance, data entry system, data statistics system, computer, wherein, CCD camera system, three coordinate measuring machine, rotating platform, electronic balance, data entry system and data statistics system are connected to a computer；S2, weight detecting: according to the shape of accurate CNC converted products, it puts and is weighed on an electronic balance repeatedly using multiple faces of accurate CNC converted products as bottom surface, multiple weighing data is removed into peak and minimum, then multiple medians are averaged, obtained numerical value is passed through in data entry system input computer.The method of the present invention is reasonable, and by multiple detection methods, the quality of comprehensive accurate CNC converted products of checking on is suitble to promote the use of.
Description
Technical field
The present invention relates to accurate CNC converted products technical field of quality detection more particularly to a kind of precision CNC converted products
Quality determining method.
Background technique
General CNC processing typically refers to computer digital control precision machinery processing, CNC lathe for machining, CNC processing milling
Bed, CNC processing boring and milling machine etc..CNC be called do computer gong, CNCCH or numerically-controlled machine tool in fact and be the one kind of Hong-Kong over there
Method, incoming continent Pearl River Delta, was exactly CNC milling machine in fact later, made " CNC machining center " mechanical with someone in wide, Jiangsu-zhejiang Shanghai Area one
One kind of processing is New Processing, and groundwork is machining programming, i.e., original handwork is switched to computer programming.
Certainly the experience of manual processing is needed.Numerical control processing refers to the processing carried out with the machining tool of numerical control.CNC refers to numerically-controlled machine tool
Control is programmed by numerical control processing language, usually G code.Numerical control processing G code language tells the processing knife of numerically-controlled machine tool
Which kind of Cartesian position coordinate tool uses, and controls the feed speed and the speed of mainshaft and tool changer, coolant of cutter
Etc. functions.Numerical control processing has very big advantage with respect to manual processing, and the part produced such as numerical control is very accurate and has
There is repeatability；Numerical control processing can produce the impossible part with complex appearance of manual processing.Computerized Numerical Control processing technology
Popularity, most of machine shop all have a numerical control processing ability, most common in typical machine shop
Numerical control processing mode has numerical control mill, numerical control lathe and the cutting of numerical control wire-EDM.
After to work pieces process, obtains accurate CNC converted products and need to carry out quality testing, existing detection generally passes through
Eye-observation, then detected by instrument, the error of detection is larger, and three coordinate measuring machine is wide since its measurement accuracy is high
General is applied to during machine-building.But during actual machine-building, measurement accuracy is also difficult to meet demand,
For example, three axis of three coordinate measuring machine cannot be accomplished completely vertically.Therefore, it is generally required in measurement process by other measurements
Equipment is detected, and carries out accuracy compensation.In the past when the verticality of three axis to measuring machine compensates, hand is mostly used greatly
The method of dynamic operation, operating process is complicated, and the time is long, and human error is big, influences speed of production and precision.It needs for error progress
Compensation, for this purpose, the present invention proposes a kind of precision CNC converted products quality determining method.
Summary of the invention
The purpose of the present invention is to solve after to work pieces process, obtain accurate CNC converted products in the prior art to need
Quality testing is carried out, existing detection is generally by eye-observation, then is detected by instrument, and the error of detection is larger,
A kind of precision CNC converted products quality determining method for needing the problem of compensating for error, and proposing.
To achieve the goals above, present invention employs following technical solutions:
A kind of precision CNC converted products quality determining method, including following quality inspection steps,
S1, prepare detection instrument: accurate CNC converted products, CCD camera system, three coordinate measuring machine, rotating platform,
Electronic balance, data entry system, data statistics system, computer, wherein CCD camera system, three coordinate measuring machine, rotation
Turn platform, electronic balance, data entry system and data statistics system to be connected to a computer；
S2, weight detecting: accurate CNC converted products is placed on an electronic balance, according to the shape of accurate CNC converted products
Shape is put using multiple faces of accurate CNC converted products as bottom surface and is weighed on an electronic balance repeatedly, by multiple weighing data
Remove peak and minimum, be then averaged multiple medians, obtained numerical value is passed through into data entry system typing
In computer；
S3, appearance detection: accurate CNC converted products is placed on the rotating platform, then by CCD camera system alignment
Accurate CNC converted products, workpiece positioning detector detect object and have moved to central region close to camera system, Xiang Tu
As collecting part transmission trigger pulse, continuous trigger and external trigger can be divided into, Image Acquisition part is according to the journey being previously set
Sequence and delay, issue starting impulse to video camera and lighting system respectively, and video camera stops current scanning, restarts new
One frame scan or video camera are waited for before starting impulse is come, and starting impulse starts a frame scan after arriving,
Video camera starts the front opening exposure mechanism of a new frame scan, and the time for exposure can be previously set, another starting impulse is beaten
It turns on light optical illumination, the opening time of light should match with the time for exposure of video camera, formal to start a frame after camera exposure
The scanning and output of image；
S4, size detection: accurate CNC converted products is placed on three coordinate measuring machine, three coordinates is established, uses standard component
Coordinate is verified, error compensation is carried out to standard component, geometric element is chosen in measuring workpiece, to the geometric element amount of progress
It surveys, collects data information, data conversion is at image；
S5, comparing: establishing the threedimensional model A of standard component using SolidWorks software, includes more in threedimensional model A
A three-dimensional coordinate point value, bulking value, the smooth value of weight value and surface, the data of S2, S3 and the data of standard component are compared
It is right, and corresponding difference operation is carried out, if operation result is in error range, precision CNC converted products, which meets processing, to be wanted
It asks, if not in error range, needing to re-work workpiece.
Preferably, the data collection steps control the detector of a data acquisition device successively in three-dimensional coordinates measurement
It is moved on X, Y and Z coordinate axis of machine, and the detector point after each movement is recorded by the data acquisition device
Position coordinates, with collect coordinate point sequence { Xn }, { Yn } that the detector moves on X, Y and Z coordinate axis respectively and
{Zn}；Step is calculated, the X-coordinate axle of three coordinate measuring machine is calculated according to the coordinate point sequence { Xn }, { Yn } and { Zn }
With the error of perpendicularity a xz and Y-coordinate axle and Z coordinate of error of perpendicularity a xy of Y-coordinate axle, X-coordinate axle and Z coordinate axis
The error of perpendicularity a yz of axis；And error compensation step, by above-mentioned calculated error of perpendicularity a xy, a xz and a yz
Error of perpendicularity compensating parameter as three coordinate measuring machine is stored in a scheduled error compensation file, and to the error
Compensation file is encrypted, and generates the error of perpendicularity compensation file of three coordinate measuring machine.
Preferably, the error compensation step further include: when three coordinate measuring machine carries out position a certain in three-dimensional space
When measurement, the error compensation file is decrypted, the error of perpendicularity then read in the error compensation file is mended
Parameter is repaid, the verticality of three coordinate measuring machine at work is compensated, so that three-dimensional coordinates measurement function accurately navigates to
The position for needing to measure.
Preferably, in the S3, image acquisition part tap is received analog video signal and is digitized by A/D, either
Directly receive it is camera digitized after digital video data, digital picture is stored in processor or calculating by Image Acquisition part
In the memory of machine
Preferably, the processor handles image, is analyzed, is identified, obtains measurement result or logic control value, place
The movement of reason result control assembly line, the error for being positioned, correcting movement.
Preferably, in the S3, the bottom of rotating platform is provided with driving motor, control of the driving motor in computer
Under, uniform rotation or timing rotation cooperate the operation of CCD camera system.
Preferably, the data acquisition device is electronic ga(u)ge.
Preferably, the data statistics system is used for the data of statistic mixed-state, and stores in a computer.
Compared with prior art, the present invention provides a kind of precision CNC converted products quality determining method, having following has
Beneficial effect:
1, it is weighed on an electronic balance repeatedly by being put using multiple faces of accurate CNC converted products as bottom surface, it will
Multiple weighing data removes peak and minimum, is then averaged multiple medians, obtained numerical value is passed through data
In input system input computer, it can be ensured that the accuracy of weighing；
2, then that CCD camera system alignment is accurate by placing on the rotating platform accurate CNC converted products
CNC converted products, starting impulse start a frame scan after arriving, and video camera starts the front opening exposure machine of a new frame scan
Structure, time for exposure can be previously set, another starting impulse opens lighting, and the opening time of light should be with video camera
Time for exposure matching, after camera exposure, the formal scanning and output for starting a frame image can process accurate CNC and produce
The appearance of product is detected, if qualified；
3, by the way that accurate CNC converted products to be placed on three coordinate measuring machine, three coordinates are established, with standard component to coordinate
It is verified, error compensation is carried out to standard component, geometric element is chosen in measuring workpiece, geometric element is measured, is received
Collect data information, data conversion can effectively improve the precision of detection using error compensation at image, improve precision CNC processing
The quality of product；
And be not directed to part in the device and be the same as those in the prior art or can be realized by using the prior art, the present invention
Method is reasonable, and by multiple detection methods, the quality of comprehensive accurate CNC converted products of checking on is suitble to promote the use of.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.
Embodiment
A kind of precision CNC converted products quality determining method, including following quality inspection steps,
S1, prepare detection instrument: accurate CNC converted products, CCD camera system, three coordinate measuring machine, rotating platform,
Electronic balance, data entry system, data statistics system, computer, wherein CCD camera system, three coordinate measuring machine, rotation
Turn platform, electronic balance, data entry system and data statistics system to be connected to a computer；
S2, weight detecting: accurate CNC converted products is placed on an electronic balance, according to the shape of accurate CNC converted products
Shape is put using multiple faces of accurate CNC converted products as bottom surface and is weighed on an electronic balance repeatedly, by multiple weighing data
Remove peak and minimum, be then averaged multiple medians, obtained numerical value is passed through into data entry system typing
In computer；
S3, appearance detection: accurate CNC converted products is placed on the rotating platform, then by CCD camera system alignment
Accurate CNC converted products, workpiece positioning detector detect object and have moved to central region close to camera system, Xiang Tu
As collecting part transmission trigger pulse, continuous trigger and external trigger can be divided into, Image Acquisition part is according to the journey being previously set
Sequence and delay, issue starting impulse to video camera and lighting system respectively, and video camera stops current scanning, restarts new
One frame scan or video camera are waited for before starting impulse is come, and starting impulse starts a frame scan after arriving,
Video camera starts the front opening exposure mechanism of a new frame scan, and the time for exposure can be previously set, another starting impulse is beaten
It turns on light optical illumination, the opening time of light should match with the time for exposure of video camera, formal to start a frame after camera exposure
The scanning and output of image；
S4, size detection: accurate CNC converted products is placed on three coordinate measuring machine, three coordinates is established, uses standard component
Coordinate is verified, error compensation is carried out to standard component, geometric element is chosen in measuring workpiece, to the geometric element amount of progress
It surveys, collects data information, data conversion is at image；
S5, comparing: establishing the threedimensional model A of standard component using SolidWorks software, includes more in threedimensional model A
A three-dimensional coordinate point value, bulking value, the smooth value of weight value and surface, the data of S2, S3 and the data of standard component are compared
It is right, and corresponding difference operation is carried out, if operation result is in error range, precision CNC converted products, which meets processing, to be wanted
It asks, if not in error range, needing to re-work workpiece.
In the present invention, the data collection steps, the detector for controlling a data acquisition device is successively surveyed in three coordinates
It is moved on X, Y and Z coordinate axis of amount machine, and the detector point after each movement is recorded by the data acquisition device
Position coordinates, with collect the coordinate point sequence { Xn }, { Yn } that the detector moves on X, Y and Z coordinate axis respectively with
And { Zn }；Step is calculated, the X-coordinate of three coordinate measuring machine is calculated according to the coordinate point sequence { Xn }, { Yn } and { Zn }
The error of perpendicularity a xz and Y-coordinate axle and Z of axis and error of perpendicularity a xy of Y-coordinate axle, X-coordinate axle and Z coordinate axis are sat
The error of perpendicularity a yz of parameter；And error compensation step, by above-mentioned calculated error of perpendicularity a xy, a xz and a
Yz is stored in a scheduled error compensation file as the error of perpendicularity compensating parameter of three coordinate measuring machine, and to the mistake
Difference compensation file is encrypted, and generates the error of perpendicularity compensation file of three coordinate measuring machine.
In the present invention, the error compensation step further include: when three coordinate measuring machine to position a certain in three-dimensional space into
When row measures, the error compensation file is decrypted, the error of perpendicularity in the error compensation file is then read
Compensating parameter compensates the verticality of three coordinate measuring machine at work, so that three-dimensional coordinates measurement function accurately positions
The position measured to needs.
In the present invention, in the S3, image acquisition part tap is received analog video signal and is digitized by A/D, or
Be directly receive it is camera digitized after digital video data, digital picture is stored in processor or meter by Image Acquisition part
In the memory of calculation machine
In the present invention, the processor handles image, is analyzed, is identified, obtains measurement result or logic control value,
The movement of processing result control assembly line, the error for being positioned, correcting movement.
In the present invention, in the S3, the bottom of rotating platform is provided with driving motor, control of the driving motor in computer
Under, uniform rotation or timing rotation cooperate the operation of CCD camera system.
In the present invention, the data acquisition device is electronic ga(u)ge.
In the present invention, the data statistics system is used for the data of statistic mixed-state, and stores in a computer
In the present invention, in use, by the way that multiple faces of accurate CNC converted products are placed on electronic balance as bottom surface
It is upper to weigh repeatedly, multiple weighing data is removed into peak and minimum, is then averaged multiple medians, by what is obtained
Numerical value passes through in data entry system input computer, it can be ensured that the accuracy of weighing；
By the way that accurate CNC converted products is placed on the rotating platform, then by CCD camera system alignment precision CNC
Converted products, starting impulse start a frame scan after arriving, and video camera starts the front opening exposure mechanism of a new frame scan, expose
It can be previously set between light time, another starting impulse opens lighting, and the opening time of light should be with the exposure of video camera
Light time match, after camera exposure, the formal scanning and output for starting a frame image can be to accurate CNC converted products
Appearance is detected, if qualified；
By the way that accurate CNC converted products to be placed on three coordinate measuring machine, establish three coordinates, with standard component to coordinate into
Row verification carries out error compensation to standard component, geometric element is chosen in measuring workpiece, is measured to geometric element, collects
Data information, data conversion can effectively improve the precision of detection using error compensation at image, improve precision CNC processing and produce
The quality of product；
And be not directed to part in the device and be the same as those in the prior art or can be realized by using the prior art, the present invention
Method is reasonable, and by multiple detection methods, the quality of comprehensive accurate CNC converted products of checking on is suitble to promote the use of.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of precision CNC converted products quality determining method, which is characterized in that including following quality inspection steps,
S1, prepare detection instrument: accurate CNC converted products, CCD camera system, three coordinate measuring machine, rotating platform, electronics
Balance, data entry system, data statistics system, computer, wherein CCD camera system, three coordinate measuring machine, rotary flat
Platform, electronic balance, data entry system and data statistics system are connected to a computer；
S2, weight detecting: accurate CNC converted products is placed on an electronic balance, according to the shape of accurate CNC converted products,
It puts using multiple faces of accurate CNC converted products as bottom surface and weighs repeatedly on an electronic balance, multiple weighing data is gone
Fall peak and minimum, be then averaged multiple medians, obtained numerical value is passed through into data entry system typing meter
In calculation machine；
S3, appearance detection: accurate CNC converted products is placed on the rotating platform, then that CCD camera system alignment is accurate
CNC converted products, workpiece positioning detector detect object and have moved to central region close to camera system, adopt to image
Collection part sends trigger pulse, can be divided into continuous trigger and external trigger, Image Acquisition part according to the program being previously set and
Delay, issues starting impulse to video camera and lighting system respectively, and video camera stops current scanning, restarts a new frame
Scanning or video camera are waited for before starting impulse is come, and starting impulse starts a frame scan after arriving, and are imaged
Machine starts the front opening exposure mechanism of a new frame scan, and the time for exposure can be previously set, another starting impulse opens lamp
The opening time of optical illumination, light should match with the time for exposure of video camera, formal to start a frame image after camera exposure
Scanning and output；
S4, size detection: accurate CNC converted products is placed on three coordinate measuring machine, three coordinates are established, with standard component to seat
Mark is verified, and carries out error compensation to standard component, geometric element is chosen in measuring workpiece, is measured to geometric element,
Data information is collected, data conversion is at image；
S5, comparing: establishing the threedimensional model A of standard component using SolidWorks software, includes multiple three in threedimensional model A
Coordinate point value, bulking value, the smooth value of weight value and surface are tieed up, the data of S2, S3 are compared with the data of standard component, and
Corresponding difference operation is carried out, if operation result is in error range, precision CNC converted products meets processing request, such as
Fruit in error range, then does not need to re-work workpiece.
2. a kind of precision CNC converted products quality determining method according to claim 1, which is characterized in that the data
Acquisition step, the detector for controlling a data acquisition device are successively moved up in X, Y of three coordinate measuring machine and Z coordinate axis
It moves, and records the position coordinates of the detector point after each movement by the data acquisition device, to collect the inspection
The coordinate point sequence { Xn }, { Yn } and { Zn } that gauge head moves on X, Y and Z coordinate axis respectively；Step is calculated, according to described
Coordinate point sequence { Xn }, { Yn } and { Zn } calculates the X-coordinate axle of three coordinate measuring machine and the error of perpendicularity a of Y-coordinate axle
The error of perpendicularity a xz and Y-coordinate axle of xy, X-coordinate axle and Z coordinate axis and the error of perpendicularity a yz of Z coordinate axis；And accidentally
Poor compensation process, using above-mentioned calculated error of perpendicularity a xy, a xz and a yz as the verticality of three coordinate measuring machine
Error compensation parameter is stored in a scheduled error compensation file, and the error compensation file is encrypted, raw
File is compensated at the error of perpendicularity of three coordinate measuring machine.
3. a kind of precision CNC converted products quality determining method according to claim 2, which is characterized in that the error
Compensation process further include: when three coordinate measuring machine measures position a certain in three-dimensional space, to the error compensation text
Part is decrypted, and then reads the error of perpendicularity compensating parameter in the error compensation file, exists to three coordinate measuring machine
Verticality when work compensates, so that three-dimensional coordinates measurement function accurately navigates to the position for needing to measure.
4. a kind of precision CNC converted products quality determining method according to claim 1, which is characterized in that in the S3,
Image acquisition part tap is received analog video signal and is digitized by A/D, or directly receive it is camera digitized after
Digital picture is stored in the memory of processor or computer by digital video data, Image Acquisition part.
5. a kind of precision CNC converted products quality determining method according to claim 4, which is characterized in that the processing
Device handles image, analyzed, identified, obtains measurement result or logic control value, processing result control assembly line movement,
Positioned, corrected the error of movement.
6. a kind of precision CNC converted products quality determining method according to claim 1, which is characterized in that in the S3,
The bottom of rotating platform is provided with driving motor, and driving motor under control of the computer, match by uniform rotation or timing rotation
Close the operation of CCD camera system.
7. a kind of precision CNC converted products quality determining method according to claim 3, which is characterized in that the data
Acquisition device is electronic ga(u)ge.
8. a kind of precision CNC converted products quality determining method according to claim 1, which is characterized in that the data
Statistical system is used for the data of statistic mixed-state, and stores in a computer.
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