CN107085409A - The dynamic error method of inspection and device of a kind of Digit Control Machine Tool - Google Patents
The dynamic error method of inspection and device of a kind of Digit Control Machine Tool Download PDFInfo
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- CN107085409A CN107085409A CN201710438895.0A CN201710438895A CN107085409A CN 107085409 A CN107085409 A CN 107085409A CN 201710438895 A CN201710438895 A CN 201710438895A CN 107085409 A CN107085409 A CN 107085409A
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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
- G05B19/404—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 compensation, e.g. for backlash, overshoot, tool offset, tool wear, temperature, machine construction errors, load, inertia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/007—Arrangements for observing, indicating or measuring on machine tools for managing machine functions not concerning the tool
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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
- G05B2219/35—Nc in input of data, input till input file format
- G05B2219/35408—Calculate new position data from actual data to compensate for contour error
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Abstract
The invention discloses a kind of dynamic error method of inspection of Digit Control Machine Tool, including：Data collection steps, first data related to the physical location of the cutter location of the Digit Control Machine Tool and second data related with the offset of the probe of gauge head are obtained from Digit Control Machine Tool；Data processing step, first data and second data are handled, by first data with second data convert into the theoretical Path under workpiece coordinate system, and actual Path is obtained based on the theoretical Path and second data；Analytical procedure, by the relatively theoretical Path and the actual Path, obtains the error between the theoretical Path and the actual Path, obtains the dynamic error of the Digit Control Machine Tool.Digit Control Machine Tool, gauge head and the storage medium examined the invention also discloses a kind of dynamic error verifying attachment of Digit Control Machine Tool, for dynamic error.
Description
Technical field
The invention belongs to numerical control machine tool technique field, more particularly, to a kind of dynamic error inspection party of Digit Control Machine Tool
Method and device.
Background technology
With manufacturing industry to the raising of numerical control machine tooling efficiency and required precision, it is necessary to which five-axis machine tool possesses each axis servomotor
The dynamic property that system interlink coordinates, and the good and bad of dynamic property will produce notable shadow to the quality and processing efficiency of processing workpiece
Ring.
In order to verify whether the dynamic property of five-axis machine tool meets requirement, it is necessary to examine the dynamic accuracy of five-axis machine tool.It is right
In the inspection of five-axis machine tool dynamic accuracy, domestic and foreign scholars have done numerous studies, and the Analysis on Mechanism and power of system are still lacked at present
The evaluation criterion of prestige.It can partly reflect the dynamic accuracy of lathe based on the exemplar method of test specimen cutting is examined.Compare in the world at present
More famous lathe examines test specimen, and the NAS979 in such as U.S. examines the corner frustum of test specimen, Japan to examine test specimen and German plum
This examines test specimen etc. to Saden, be only capable of examining lathe static or lower-speed state under every precision, for lathe in high speed operation shape
Detection under state is helpless.Moreover, some lathes detected by above-mentioned test specimen, still occur precision in actual applications
The phenomenon for expecting to require is not reached.
Patent CN200710048269.7 disclose it is a kind of " the serpentine detection test specimen of integrated detecting precision of numerical control milling machine and
Its detection method " proposes a kind of test specimen detected to Five Axis CNC milling machine five-axis linkage machine tools precision, and also relates to
And the method for the precision that linked using detection test specimen detection Five Axis CNC milling machine multi axes, as shown in Figure 1.The detection test specimen exists
The feature of aviation thin-walled has been incorporated in test specimen type face, the static accuracy of five-axis machine tool can not only be reflected, and has been paid close attention to
The dynamic accuracy of five-axis machine tool.Test specimen surface curvature changes and changed with surface configuration, special with the conversion of opening and closing angle around the corner
Levy, can reflect the dynamic error of five-axis machine tool to a certain extent by cutting " S " part.
According to the method for inspection of five-axis machine tool dynamic accuracy disclosed in patent CN200710048269.7, as shown in figure 1, often
Once examine and is required for five-axis machine tool processing once " S " part, including from preparing the whole of blank, roughing and finishing
Process；Then " S " part processed is detected into its profile errors with three-coordinates measuring machine；If the profile errors of " S " part do not conform to
Lattice are, it is necessary to find the lathe factor for causing five-axis machine tool dynamic error, and adjust lathe relevant parameter；Then, then intactly add
Work once " S " part, untill " S " part of processing meets required precision.The inspection of such five-axis machine tool dynamic accuracy
Time is about one to two days, and some time can be longer.This largely causes time and test specimen blank material, electric energy
Etc. the waste of resource, and this method is not easy to the periodic inspection of five-axis machine tool dynamic accuracy and the amendment of dynamic property and tune
It is whole.This method is when whether " S " part of checking processing is qualified, in addition it is also necessary to instruments such as three-coordinates measuring machines, increase to deflecting
The cost that five-axis machine tool dynamic accuracy is examined.
The content of the invention
For the disadvantages described above or Improvement requirement of prior art, the invention provides the dynamic error inspection party of Digit Control Machine Tool
Method and device, by gauge head along cutter path fit " S " part straight burr machined surface scanning motion replace cutter feed motion
The dynamic error of five-axis machine tool is obtained, to examine the dynamic accuracy of five-axis machine tool.
To achieve the above object, it is proposed, according to the invention, there is provided a kind of dynamic error method of inspection of (1) Digit Control Machine Tool, bag
Include：Data collection steps, first data related to the physical location of the cutter location of the Digit Control Machine Tool are obtained from Digit Control Machine Tool
Second data related to the offset of the probe of gauge head；Data processing step, to first data and second number
According to being handled, by first data and second data convert into the theoretical Path under workpiece coordinate system, and base
Actual Path is obtained in the theoretical Path and second data；Analytical procedure, passes through relatively more described theoretical knife
Position track and the actual Path, obtain the error between the theoretical Path and the actual Path, obtain
Obtain the dynamic error of the Digit Control Machine Tool.Using above-mentioned technical proposal, it is not necessary to actual processing workpiece, also avoid the need for using three
The instruments such as coordinate measuring apparatus, test stage is convenient and swift, has effectively saved the time in checkout procedure and resources costs.
(2) according to the dynamic error method of inspection described in (1), first data pass through the good work of edge digital control processing
The outline of part is scanned measurement and obtained.
(3) according to the dynamic error method of inspection described in (2), with identical feed speed during workpiece described in digital control processing
Cutter path identical movement locus during with processing is scanned measurement to the outline of the workpiece.
(4) the dynamic error method of inspection according to (3), the workpiece is " S " part, and the cutter path is described
The cutter path of a closure parallel with the base bottom surface of " S " part in the finishing of " S " part.
(5) the dynamic error method of inspection according to (4), when the outline to the workpiece is scanned measurement,
When the position do not scanned on the ruled surface of " S " part described in appearance, then the position is carried out with the probe of the gauge head local
Scanning survey, or touch with the probe of the gauge head position and carry out once examining measurement.
(6) according to the dynamic error method of inspection described in (5), when the position that discovery scanning survey is crossed has been unsatisfactory for numerical control
During the requirement of the dynamic accuracy of lathe, then the measurement of the further inspection to other non-scanned positions is terminated.
(7) the dynamic error method of inspection according to any one of (1)~(6), the actual Path is by inciting somebody to action
The theoretical Path is obtained plus the offset data of the probe of the gauge head.
(8) the dynamic error method of inspection according to any one of (1)~(6), first data are in the number
Control the data related to the physical location of the cutter location of the Digit Control Machine Tool under lathe coordinate system；Second data is in institutes
State the data related to the offset of the probe under gauge head coordinate system.
Another aspect of the present invention additionally provides a kind of dynamic error verifying attachment of (9) Digit Control Machine Tool, including：Display
Device；Processor, can carry out following processing：Obtain related to the physical location of the cutter location of the Digit Control Machine Tool from Digit Control Machine Tool
The first data and second data related to the offset of the probe of gauge head；First data and second data are entered
Row processing, by first data with second data convert into the theoretical Path under workpiece coordinate system, and based on institute
State theoretical Path and second data obtain actual Path；Pass through the relatively theoretical Path and the reality
Border Path, obtains the error between the theoretical Path and the actual Path, obtains the Digit Control Machine Tool
Dynamic error.
(10) the dynamic error verifying attachment according to (9), it is good along digital control processing that first data pass through
The outline of workpiece is scanned measurement and obtained.
(11) according to the dynamic error verifying attachment described in (10), with identical feeding speed during workpiece described in digital control processing
Degree and with processing when cutter path identical movement locus measurement is scanned to the outline of the workpiece.
(12) according to the dynamic error verifying attachment described in (9)~(11), the actual Path is by by the reason
Obtained by Path plus the offset data of the probe of the gauge head.
(13) the dynamic error method of inspection according to any one of (9)~(11), first data are in numerical control
The data related to the physical location of the cutter location of the Digit Control Machine Tool under lathe coordinate system；Second data are in gauge head
The data related to the offset of the probe under coordinate system.
The present invention still further provides a kind of (14) Digit Control Machine Tool that can be used in dynamic error inspection, including：Numerical control
Device, servo drive, signal monitoring harvester, gauge head and main shaft；The numerical control device, for controlling the numerical control
The operation of the associated components of lathe；The signal monitoring harvester, is connected to sensing equipment, is transmitted for read-write sensor
Digital quantity and/or analog signalses；The servo drive is used for the numeral for receiving the signal monitoring harvester
Measure signal, and the motion for the servomotor for exporting the analog signalses to control the main shaft；The gauge head is installed in institute
State on main shaft, service data and the gauge head self-operating data for gathering the main shaft, and the data gathered are passed
Give the signal monitoring harvester.
(15) Digit Control Machine Tool according to (14), in addition to：Ups power, for the numerical control device and described stating
The input/output module of signal monitoring harvester is powered.
(16) Digit Control Machine Tool according to (14), the signal monitoring harvester is high for the analog quantity based on STM32
Fast data acquisition I/O modules.
(17) Digit Control Machine Tool according to (14), the gauge head is three-dimensional scanning type gauge head, and the probe of the gauge head exists
There is certain range on space three-dimensional direction, the movement in each direction of probe there can be the defeated of sine and cosine analog signalses
Go out.
(18) Digit Control Machine Tool according to (14), it is characterised in that the signal monitoring harvester is turned by AD/DA
Change the input and output for completing the sensor and the servo driving device and the sensor and the signal monitoring harvester
Data communication transmission between module.
(19) Digit Control Machine Tool according to any one of (14)~(18), the numerical control device has prepared gauge head and has exceeded amount
Journey protection module, when the range of the gauge head reaches excess of stroke critical condition, the numerical control device sends excess of stroke control signal, control
Make the operation of the corresponding component of the Digit Control Machine Tool.
(20) Digit Control Machine Tool according to (19), when the range of the gauge head reaches excess of stroke critical condition, the number
Control device sends excess of stroke control signal, controls the operation of the locked main shaft of Digit Control Machine Tool.
(21) Digit Control Machine Tool according to any one of (14)~(18), the gauge head has overtravel protection unit, when
When the range of the gauge head reaches excess of stroke critical condition, excess of stroke alarm signal is sent.In the above-mentioned technical solutions, when the gauge head
Range when reaching excess of stroke critical condition, excess of stroke alarm signal is sent, to remind user's gauge head to need the excess of stroke to take necessity to arrange
Apply, prevent damage or the mechanical disorder of the gauge head.
The present invention still further provides a kind of (22) gauge head that can be used in dynamic error inspection, including：Gauge head body
And probe；The gauge head body has overtravel protection unit, can send excess of stroke signal in the displacement excess of stroke of the gauge head.Upper
State in technical scheme, by sending excess of stroke signal to numerical control device so that numerical control device sends excess of stroke control signal, with control
The operation of the corresponding components such as the servo drive, servomotor or axle of Digit Control Machine Tool is stated, can automatically and efficiently be prevented
Gauge head is stated to damage or mechanical disorder
(23) according to the gauge head described in (22), the probe can be by the machined surface of workpiece of fitting, to the workpiece
Outline is scanned measurement, the offset of probe itself described in the physical location for the cutter location for gathering Digit Control Machine Tool.
(24) gauge head according to (22), the overtravel protection unit reaches the critical bar of the excess of stroke in the range of the gauge head
Excess of stroke alarm signal is sent during part.In the above-mentioned technical solutions, excess of stroke alarm signal is sent by above-mentioned overtravel protection unit, can
To remind user to take the necessary measures, prevent above-mentioned gauge head from damaging or mechanical disorder.
(25) gauge head according to any one of (22)~(24), the excess of stroke signal is sent to the number of Digit Control Machine Tool
Device is controlled, the numerical control device sends excess of stroke control signal based on the excess of stroke signal, controls the corresponding portion of the Digit Control Machine Tool
The operation of part.
(26) gauge head according to (25), the numerical control device sends excess of stroke control signal based on the excess of stroke signal,
Control the operation of the locked main shaft of the Digit Control Machine Tool.
The present invention furthermore provides a kind of (27) storage medium, and storage makes at least one processor be able to carry out following behaviour
The program of work：From Digit Control Machine Tool acquisition first data related to the physical location of the cutter location of the Digit Control Machine Tool and and gauge head
Probe related the second data of offset；First data and second data are handled, by described first
Data and second data convert are based on the theoretical Path and institute into the theoretical Path under workpiece coordinate system
State the second data and obtain actual Path；By the relatively theoretical Path and the actual Path, institute is obtained
The error between theoretical Path and the actual Path is stated, the dynamic error of the Digit Control Machine Tool is obtained.
(28) according to the storage medium described in (27), first data are outer by the good workpiece of edge digital control processing
Profile is scanned measurement and obtained.
(29) according to the storage medium described in (27), with identical feed speed and with adding during workpiece described in digital control processing
The cutter path identical movement locus in man-hour is scanned measurement to the outline of the workpiece.
(30) according to the storage medium described in (27)~(29) any one, the actual Path is by by the reason
Obtained by Path plus the offset data of the probe of the gauge head.
(31) storage medium according to any one of (27)~(29), first data are in NC Machine Tools Coordinate
The data related to the physical location of the cutter location of the Digit Control Machine Tool under system；Second data are under gauge head coordinate system
The data related to the offset of the probe.
In general, by the contemplated above technical scheme of the present invention compared with prior art, it can obtain down and show
Beneficial effect：
1) method proposed by the present invention does not need actual processing " S " part, avoids the need for using the instrument such as three-coordinates measuring machine yet
Device, test stage is convenient and swift, has effectively saved the time in checkout procedure and resources costs.
2) tool track of gauge head is the track of cutter in the finishing of " S " part, measuring probe in dynamic accuracy checkout procedure
Fitted with " S " part type face, because " S " part is the good inspection test specimen of digital control processing, cutter is substituted with smart with cutter with gauge head
Error amount obtained by straight burr machined surface progress laminating scanning survey of the processing identical feed speed along this " S " part can
Effectively the linkage performance of each reference axis of reflection five-axis machine tool, servo drive control system and each servomotor, is adopted synchronous
Collection come lathe coordinate system under data by data processing be reduced into workpiece coordinate system give an order knife rail and plus gauge head offset
The actual knife rail of data, easily and effectively analyzes the dynamic error of five-axis machine tool, verifies whether the dynamic accuracy of five-axis machine tool is full
Foot is required, foundation is provided for regulation five-axis machine tool linkage performance.
3) experiment is proved, the five axle machines examined by using the method for inspection of five-axis machine tool dynamic accuracy of the present invention
Bed, its dynamic property is good in use.
Brief description of the drawings
Fig. 1 is the flow chart for examining five-axis machine tool dynamic accuracy existing method；
Fig. 2 is the dynamic error checking system structural representation of the Digit Control Machine Tool of an embodiment of the present invention；
Fig. 3 is the structured flowchart of the data processing equipment of an embodiment of the present invention；
Fig. 4 is the structural representation of the gauge head of an embodiment of the present invention；
Fig. 5 is the dynamic error inspection process figure of the Digit Control Machine Tool of an embodiment of the present invention；
Fig. 6 is the structural representation of the serpentine inspection test specimen used in an embodiment of the present invention；
Fig. 7 is the lathe dynamic accuracy inspection schematic diagram based on serpentine inspection test specimen in an embodiment of the present invention；
Fig. 8 is the detailed main flow chart of the dynamic error method of inspection in an embodiment of the present invention；
Fig. 9 is the schematic diagram of gauge head in an embodiment of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in each embodiment of invention described below
Not constituting conflict each other can just be mutually combined.
1~Fig. 9 of reference picture, the 5-shaft linkage numerical control lathe dynamic error method of inspection of test specimen, this hair are examined based on serpentine
Serpentine used in bright examines test specimen 60 to be the test specimen that patent CN200710048269.7 processes formation, and the serpentine is examined
Test specimen 60 is formed by digital control processing, and it is by a ruled surface uniform thickness edge strip 61 and 62 groups of a rectangular susceptor in serpentine shape
Conjunction is formed, and the two serpentine curves generated respectively in two Different Planes cross one another in the projection of base plane, and have
The open and close corner shape that is bent to form of change is changed in intersection, and the ruled surface and base plane angle angle are along its " S " line
Movement locus is moved towards in non-uniform change,
The dynamic error method of inspection comprises the following steps：
1st, gauge head 19 is arranged on the main shaft of 5-shaft linkage numerical control lathe, and the digital control processing is completed, and
" S " the part clamping of setting accuracy requirement is met on the workbench of 5-shaft linkage numerical control lathe；
Gauge head 19 in the present invention is contact-type 3 D scanning feeler, it is preferred to use Renishaw SP2-1 contact-type 3 Ds
Scanning feeler, Renishaw SP2-1 contact-type 3 Ds scanning feeler is mainly made up of four parts, including motion subsystem, measurement
Subsystem, overtravel protection unit and probe 192 are constituted, and the schematic diagram of the main body of gauge head 19 is as shown in Figure 4.Overtravel protection unit energy
Excess of stroke signal is sent after the displacement of gauge head 19 exceedes range, prevents gauge head 19 from damaging or mechanical disorder.The excess of stroke it is critical
Condition is as shown in table 1.
The critical value of the gauge head excess of stroke of table 1
| Reference axis | Range/mm | Stress/N |
| X、Y | 18mm (has 100mm needle points) | 20N~65N |
| Z | 5mm minimum values | 400N~600N |
For weight is 0-10g probe 192, the range of each axle of gauge head 19 is definite value, but different peaces
Dress mode range is again different, as shown in table 2.
The gauge head range of table 2
The five-axis machine tool and digital control system of dynamic accuracy to be detected are the type digital control system of Central China 8, the system in the present embodiment
The middle range system according to gauge head 19 has matched somebody with somebody the overtravel protection software module of gauge head 19 and lock spindle crashes and made.
Gauge head 19 is connected to the analog quantity high-speed data acquisition I/O modules based on STM32 through data connecting line, and the module is again
It is connected with numerical control system bus.Because the signal that gauge head 19 is exported is sine and cosine analog signal, it is necessary to enter by above-mentioned I/O modules
Analog signal, is converted into data signal by bus and sends digital control system to by row analog-to-digital conversion.
2nd, the probe 192 of gauge head 19 is first fitted the straight burr machined surface of " S " part, identical when then with digital control processing " S " part
Feed speed and wherein cutter path identical movement locus during with data mart modeling " S " part, scanned along the outline of " S " part
A border is measured, at the same time, the physical location and the probe of gauge head 19 of the cutter location of synchronous acquisition 5-shaft linkage numerical control lathe
192 offset；
The check problem that five-axis machine tool is run in the present invention in the standardization program of processing " S " part in finishing procedures as
The track program parallel with " S " part pedestal baseplane of a closure shown in Fig. 2, and have modified the auxiliary generation such as speed of mainshaft
Code, it is ensured that the feed speed of cutter is consistent when feed speed during 19 scanning survey of gauge head is somebody's turn to do " S " part with processing.In digital control system
Brought into operation check problem, and the physical location and gauge head 19 of the cutter location of five-axis machine tool are gathered using sampling analysis software synchronization
Offset.
The sampling analysis software used in the present invention has the work(such as data acquisition, data preservation, data processing, data analysis
Energy.By sampling analysis software installation on PC, digital control system is connected with PC with netting twine, and sets IP address for example, passing through
Communication protocol sets interface etc., sets up the correct connection of digital control system and analysis software.
3rd, the data that synchronous acquisition comes are reduced into by data processing the theoretical Path 63 under workpiece coordinate system, and
Actual Path 63 is obtained by theoretical Path 63 and the offset data of 19 probe of gauge head 192, so as to obtain theoretical cutter spacing
Track 63 and the error of actual Path 63, the error is the dynamic error of 5-shaft linkage numerical control lathe.
The data of machine tool instructions position and the skew of the probe 192 of gauge head 19 in the checkout procedure of collection in real time of the invention, collection
Stored data into after end local.The software can be by the machine tool instructions position data and gauge head under the lathe coordinate system of collection
The offset data of probe 192 under 19 coordinate systems is reduced into machine tool instructions knife rail under workpiece coordinate system and plus the offset numbers of gauge head 19
According to actual knife rail.By the contrast of machine tool instructions knife rail and actual knife rail, find there are some places to survey during scanning survey " S " part
First 19 probe 192 will not hit on " S " part, is accomplished by for such place by the way of partial sweep is measured or is touched
Measurement is examined again, if it find that the place that scanning survey has been crossed has been unsatisfactory for the requirement of dynamic accuracy, it is possible to eventually
It is only further to examine measurement, all measured until the error in the curvilinear path of one closure of " S " part.Entirely examined
Journey only needs to one to two hours, substantially reduces Check-Out Time, has saved resources costs.
In addition, in order that the thought of the present invention is clearer, present invention also offers a kind of dynamic error checking system, figure
2 be the dynamic error checking system structural representation of the Digit Control Machine Tool of present embodiment.As shown in Fig. 2 dynamic error examines system
System includes data processing equipment 1 and Digit Control Machine Tool 2, and above-mentioned data processing equipment 1 is communicated to connect with above-mentioned Digit Control Machine Tool 2.It is above-mentioned
Communication connection 3 can include but is not limited to be that wirelessly or non-wirelessly network connection, LAN connection, data wire connection, bluetooth etc. connect
Connect mode.For example, by setting IP address, setting interface etc. by communication protocol, set up above-mentioned data processing equipment 1 with it is above-mentioned
Correct connection between Digit Control Machine Tool 2.
Above-mentioned data processing equipment 1 can be PC (PC), be provided with sampling analysis software, and the sampling analysis is soft
Part has the functions such as data acquisition, data preservation, data processing, data analysis.Above-mentioned data processing equipment 1 is from above-mentioned numerical control machine
Bed 2 obtains data, and carries out data processing and analysis to the data gathered with above-mentioned sampling analysis software.
Above-mentioned Digit Control Machine Tool 2 includes numerical control device 11, servo drive 12, signal monitoring harvester 18, gauge head 19
And main shaft 20 etc., between numerical control device 11, servo drive 12 and the signal monitoring harvester 18 of above-mentioned Digit Control Machine Tool 2
It can carry out being in communication with each other connection by bus 27 and 28.Wherein, above-mentioned numerical control device 11 is the five-axle linkage number of Digit Control Machine Tool
Control system, controls the operation of the associated components of above-mentioned Digit Control Machine Tool 2；Above-mentioned servo drive 12 is used to receive above-mentioned signal prison
The digital quantity signal of harvester 18 is controlled, and receives the feedback signal of external encoder (not shown), and exports analog quantity letter
Number come the motion of the servomotor that controls above-mentioned main shaft 20；Above-mentioned signal monitoring harvester 18 be connected to various pressure, position,
The sensing equipments such as temperature, voltage, are mainly used in the digital quantity and/or analog signalses of read-write sensor transmission, and pass through AD/DA
Convert the input and output mould of sensor and above-mentioned servo driving device 12 and sensor and above-mentioned signal monitoring harvester 18
Data communication transmission between block；Above-mentioned gauge head 19 is installed on above-mentioned main shaft 20, the operation number for gathering above-mentioned main shaft
According to the above-mentioned self-operating data of gauge head 19, and send the above-mentioned data gathered to above-mentioned signal monitoring harvester 18.
Above-mentioned Digit Control Machine Tool 2 can also include power supply 26, for above-mentioned numerical control device 11 and the collection of above-mentioned signal monitoring
The input/output module of device 18 is powered.
In the above-described embodiment, it is preferable that above-mentioned Digit Control Machine Tool 2 is 5-shaft linkage numerical control lathe, it can also include watching
Take drive device 13~17 and axle (A, C, X, Y, Z) 21~25.Above-mentioned servo drive 13~17 is used to receive above-mentioned signal
The digital quantity signal of monitoring collection device 18, and the feedback signal of external encoder (not shown) is received, and export analog quantity
Signal controls the motion of the servomotor of above-mentioned main shaft 21~25；Above-mentioned signal monitoring harvester 18 is changed by AD/DA
Complete the input and output mould of sensor and above-mentioned servo driving device 13~17 and sensor and above-mentioned signal monitoring harvester 18
Data communication transmission between block.
In the above-described embodiment, it is preferable that above-mentioned signal monitoring harvester 18 is the analog quantity high speed based on STM32
Data acquisition I/O modules, it is highly preferred that being HIO-1000 and/or HIO-1000PULSE signal monitoring acquisition modules.
In the above-described embodiment, it is preferable that above-mentioned bus 27 and 28 is NCUC-BUS buses.NCUC-BUS buses are one
What the numerical control producers such as kind of Central China numerical control joint was formulated standardize, open data/address bus, is mainly used in Digit Control Machine Tool and respectively connects
The digital communication NCUC-BUS buses of equipment room are connected in series each module the signal transmission realized between each module.
In the above-described embodiment, it is preferable that above-mentioned power supply 26 is ups power module, using the teaching of the invention it is possible to provide power-off UPS functions,
Preserve power-off, power-off rollback becomes light.
In the above-described embodiment, it is preferable that above-mentioned gauge head 19 is three-dimensional scanning type gauge head, it is highly preferred that above-mentioned gauge head
19 be Renishaw SP2-1 gauge heads, and the probe of the Renishaw SP2-1 gauge heads has a certain amount of on space three-dimensional direction
Journey, the movement in each direction of probe can have the output of sine and cosine analog signalses.
In the above-described embodiment, it is preferable that prepared in above-mentioned numerical control device 11 according to the range of above-mentioned gauge head 19
Above-mentioned gauge head 19 surpasses overrange protection software module, and control letter is sent when the displacement of above-mentioned gauge head 19 exceedes range (excess of stroke)
Number, the operation of the corresponding components such as servo drive, servomotor or the axle of above-mentioned Digit Control Machine Tool 2 is controlled, above-mentioned gauge head is prevented
19 damage or mechanical disorder.It is highly preferred that also having prepared master according to the range of above-mentioned gauge head 19 in above-mentioned numerical control device 11
The locked mechanism of axle, control signal is sent when the displacement of above-mentioned gauge head 19 exceedes range (excess of stroke), controls above-mentioned Digit Control Machine Tool 2 to lock
The operation of dead above-mentioned main shaft 20, prevents above-mentioned gauge head 19 from damaging or mechanical disorder.
Fig. 3 is the structured flowchart of the data processing equipment of present embodiment.As shown in figure 3, data processing equipment 1 can be by
PC (PC) etc. is constituted, mainly by composition data processing controller 31, display 32 and the key such as including CPU, ROM and RAM
Disk 33.Data processing controller 31 is main to be inputted by CPU31a, ROM31b, RAM31c, hard disk 31d, reading device 31e, output
Interface 31f, communication interface 31g and data output interface 31h are constituted.CPU31a, ROM31b, RAM31c, hard disk 31d, reading dress
31e, input and output interfaces 31f, communication interface 31g and data output interface 31h is put to be connected with each other by bus 31i, can be mutual
Mutually transmitting-receiving control signal and control calculate data etc..Display 32 is used to show after the reduction of analysis result and/or associated workpiece
Trajectory diagram etc..
CPU31a, which can be performed, to be stored in ROM31b computer program and reads the computer program in RAM31c.
ROM31b is made up of read-only storage, PROM, EPROM, EEPROM etc., stores the computer journey performed by CPU31a
Sequence and its data used etc..RAM31c is made up of SRAM or DRAM etc., is stored in by reading based on ROM301b and hard disk 31d
Calculation machine program.RAM31c is also used as working space when CPU31a performs these computer programs.
Hard disk 31d stores operating system and application program etc. for the various computer programs of CPU31a execution and its held
Data used in the row computer program.Sampling analysis software 7a in present embodiment also is stored in this hard disk 31d.
Reading device 31e is made up of floppy drive, CD-ROM drive or DVD-ROM drive etc., can be read be stored in it is portable
The computer program or data of type storage medium 7.Pocket storage medium 7 is stored with sampling analysis software 7a, computer (data
Processing unit) 1 can from the pocket storage medium 7 read sampling analysis software 7a, be loaded into hard disk 31d.
Above-mentioned sampling analysis software 7a can not only be provided by pocket storage medium 7, can also pass through electric communication line
External mechanical being connected from the electric communication line (no matter wired, wireless), being communicated with computer (data processing equipment) 1
It is upper to download.Such as, above-mentioned sampling analysis software 7a is stored in the hard disk of the webserver, computer (data processing equipment) 1
This server is may have access to, sampling analysis software 7a is downloaded, loads hard disk 31d.
The Windows (registration mark) of hard disk 31d equipped with the production of such as MS etc. provide graphic user interface
Operating system.In the following description, the sampling analysis software 7a of present embodiment is performed in aforesaid operations system.
Input and output interfaces 31f by the serial line interfaces such as such as USB, IEEE1394, RS-232C, SCSI, IDE,
The parallel interfaces such as IEEE1284 and the analog signal interface being made up of D/A converter and A/D converter etc. are constituted.Output input connects
Mouth 31f connects keyboard 33, and user can be with keyboard 33 directly to the input data of computer (data processing equipment) 1.
Communication interface 31g can be such as Ethernet (Ethernet, registration mark) interface.(data processing is filled computer
Put) 1 it can be used by communication interface 31g and transmit data between certain communication protocol and above-mentioned Digit Control Machine Tool 2.
The display 32 that data output interface 31h is constituted with by LCD or CRT etc. is connected, by with the phase that is received from CPU31a
The track data after workpiece reduction is answered to be output to display 32.Therefore, display 32 can going back according to the associated workpiece of input
Track data after original shows the track after associated workpiece reduction.
Fig. 4 is the structural representation of the gauge head of present embodiment.As shown in figure 4, above-mentioned gauge head 9 includes gauge head body 191
With probe 192.There is above-mentioned gauge head body 191 parts such as motion subsystem, measurement subsystem, overtravel protection unit (not scheme
Show).Wherein, above-mentioned overtravel protection unit can send excess of stroke signal when the displacement of above-mentioned gauge head 19 exceedes range (excess of stroke), and
Above-mentioned excess of stroke signal is sent to above-mentioned numerical control device 11, believed by above-mentioned numerical control device 11 based on the received above-mentioned excess of stroke
Number, excess of stroke control signal is sent, the corresponding component such as servo drive, servomotor or axle to control above-mentioned Digit Control Machine Tool 2
Operation, prevent above-mentioned gauge head 19 from damaging or mechanical disorder.
For different weight (such as 0~10g) probe 192, the range of each axle of above-mentioned gauge head 19 is definite value.
But, different mounting means, range again can be different.
In order to prevent above-mentioned gauge head 19 from damaging or mechanical disorder, the critical condition of the excess of stroke can be set, when range reaches
During above-mentioned excess of stroke critical condition, above-mentioned overtravel protection unit sends excess of stroke alarm signal, to remind user to take the necessary measures, and prevents
Only above-mentioned gauge head 19 is damaged or mechanical disorder.
Fig. 5 is the dynamic error inspection process figure of the Digit Control Machine Tool of present embodiment.As shown in figure 5, by above-mentioned gauge head 19
It is arranged on the main shaft 20 of above-mentioned Digit Control Machine Tool 2, and workpiece 60 on the workbench (not shown) of above-mentioned Digit Control Machine Tool 2
(step S1).Wherein, above-mentioned workpiece 60 is to pass through above-mentioned Digit Control Machine Tool 2 to machine and meet setting accuracy requirement.
In the present invention, the serpentine that can be used examines test specimen 60 (i.e. " S " part) (referring to Fig. 6).Above-mentioned " S " part 60 leads to
Cross digital control processing to be formed, it is combined by one in the ruled surface uniform thickness edge strip 61 and a rectangular susceptor 62 of serpentine shape, point
The two serpentine curves not generated in two Different Planes cross one another in the projection of base plane, and with intersection
The open and close corner shape that conversion change is bent to form, the ruled surface and movement locus of the base plane angle angle along its " S " line
Moved towards in non-uniform change.
Fig. 5 is returned, with the above-mentioned workpiece 60 of the scanning survey of probe 192 of above-mentioned gauge head 19, and synchronous acquisition related data (step
Rapid S2).
Specifically, the above-mentioned servo drive 12 of the above-mentioned operation test programme-control of numerical control device 11 drives above-mentioned main shaft 20
Servomotor, the machined surface for above-mentioned workpiece that the probe 192 of above-mentioned gauge head 19 is first fitted, then with the above-mentioned work of digital control processing
Identical feed speed and wherein cutter path identical movement locus during workpiece above-mentioned with data mart modeling during part, along above-mentioned work
The border of outline scanning survey one of part, at the same time, the physical location of the cutter location of the above-mentioned Digit Control Machine Tool 2 of synchronous acquisition and
The offset of the above-mentioned probe 192 of gauge head 19.Preferably, above-mentioned check problem is G code.
In the present invention, when using " S " part 60, as shown in fig. 7, the probe 192 of above-mentioned gauge head 19 is first fitted above-mentioned " S "
The straight burr machined surface of part 60, then with identical feed speed during " S " part 60 above-mentioned with digital control processing and above-mentioned with data mart modeling
A wherein cutter path identical movement locus 63 during " S " part 60, along the border of outline scanning survey one of above-mentioned " S " part 60,
At the same time, the skew of the physical location of the cutter location of the above-mentioned Digit Control Machine Tool 2 of synchronous acquisition and the probe 192 of above-mentioned gauge head 19
Amount.
As shown in Fig. 2 above-mentioned gauge head 19 is connected to above-mentioned signal monitoring harvester 18, above-mentioned signal through data connecting line
Monitoring collection device 18 is connected with above-mentioned numerical control device 11 again.The signal that above-mentioned gauge head 19 is exported is sine and cosine analog signal, is needed
Analog-to-digital conversion is carried out by above-mentioned signal monitoring harvester 18, analog signal is converted into data signal by above-mentioned bus 27
Send above-mentioned numerical control device 11 to.
In the present invention, it is preferred to, the check problem that the numerical control device 11 of above-mentioned Digit Control Machine Tool 2 is run is processing " S " part
It is parallel with the pedestal baseplane of " S " part 60 that as shown in Figure 7 one in finishing procedures in 60 standardization program closes
Track 63 program, and the auxiliary codes such as the above-mentioned rotating speed of main shaft 20 are have modified, when ensure that above-mentioned 19 scanning survey of gauge head
Feed speed with processing should " S " part 60 when cutter feed speed it is consistent.Brought into operation inspection journey in above-mentioned numerical control device 11
During sequence, the physical location and above-mentioned gauge head 19 of the cutter location of above-mentioned Digit Control Machine Tool 2 are gathered using above-mentioned sampling analysis software synchronization
Offset.
Fig. 5 is returned to, above-mentioned data processing equipment 1 is gathered and the cutter location of above-mentioned Digit Control Machine Tool 2 from above-mentioned Digit Control Machine Tool 2
The physical location data related to the offset of the above-mentioned probe 192 of gauge head 19, run above-mentioned sampling analysis software to above-mentioned data
Handled, obtain the dynamic error (step S3) of above-mentioned Digit Control Machine Tool 2.
Specifically, above-mentioned data processing equipment 1 runs above-mentioned sampling analysis software, is gathered in real time from above-mentioned numerical control device 11
It is related to the physical location of the cutter location of above-mentioned Digit Control Machine Tool 2 and the offset of the probe 192 of above-mentioned gauge head 19 in checkout procedure
Data.After collection terminates, above-mentioned data are saved in locally by above-mentioned data processing equipment 1.Meanwhile, above-mentioned data processing dress
The above-mentioned sampling analysis software of 1 operation is put, the cutter location with above-mentioned Digit Control Machine Tool 2 under lathe coordinate system that synchronous acquisition is come
The related data of physical location and data related to the offset of above-mentioned probe 192 under the above-mentioned coordinate system of gauge head 19 it is logical
The theoretical Path that data processing is reduced under above-mentioned workpiece coordinate system is crossed, and based on above-mentioned theory Path and above-mentioned survey
The offset data of first 19 probe 192 obtains actual Path 63, so as to obtain theoretical Path and actual cutter spacing rail
The error of mark, the error is the dynamic error of above-mentioned Digit Control Machine Tool 2.
In the above-described embodiment, it is preferable that by the probe 192 that above-mentioned theory Path is added to above-mentioned gauge head 19
Offset data to obtain above-mentioned actual Path 63.
In the present invention, by the contrast of theoretical Path and actual Path, the above-mentioned workpiece of scanning survey is found
When have some local above-mentioned gauge heads 19 probe 192 will not hit on above-mentioned workpiece, be accomplished by for such place using local
Scanning survey or the mode of touching examine measurement again, if it find that the place that scanning survey has been crossed has been unsatisfactory for moving
The requirement of state precision, it is possible to terminate further examine and measure, until in the curvilinear path of above-mentioned one closure of workpiece
Error is all measured.Whole checkout procedure only needs to one to two hours, substantially reduces Check-Out Time, saved resource into
This.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, it is not used to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the invention etc., it all should include
Within protection scope of the present invention.
Claims (31)
1. a kind of dynamic error method of inspection of Digit Control Machine Tool, including：
Data collection steps, first data related to the physical location of the cutter location of the Digit Control Machine Tool are obtained from Digit Control Machine Tool
Second data related to the offset of the probe of gauge head；
First data and second data are handled by data processing step, by first data and described
Two data converts are obtained into the theoretical Path under workpiece coordinate system, and based on the theoretical Path and second data
Obtain actual Path；
Analytical procedure, by the relatively theoretical Path and the actual Path, obtains the theoretical Path
Error between the actual Path, obtains the dynamic error of the Digit Control Machine Tool.
2. the dynamic error method of inspection according to claim 1, it is characterised in that
First data are scanned measurement by the outline along the good workpiece of digital control processing and obtained.
3. the dynamic error method of inspection according to claim 2, it is characterised in that
With with described in digital control processing during workpiece identical feed speed and with processing when cutter path identical movement locus pair
The outline of the workpiece is scanned measurement.
4. the dynamic error method of inspection according to claim 3, it is characterised in that
The workpiece is " S " part, and the cutter path is the pedestal bottom of one in " S " the part finishing and " S " part
The cutter path of the parallel closure in face.
5. the dynamic error method of inspection according to claim 4, it is characterised in that in the outline progress to the workpiece
During scanning survey, when the position do not scanned on the ruled surface of " S " part described in appearance, then with the probe of the gauge head to the portion
Position carries out partial sweep measurement, or touches with the probe of the gauge head position and once examine and measure.
6. the dynamic error method of inspection according to claim 5, it is characterised in that when finding position that scanning survey is crossed
During the requirement of the dynamic accuracy through being unsatisfactory for Digit Control Machine Tool, then the measurement of the further inspection to other non-scanned positions is terminated.
7. the dynamic error method of inspection according to claim 1~6 any one, it is characterised in that the actual cutter spacing
Track is by the way that the theoretical Path is obtained plus the offset data of the probe of the gauge head.
8. the dynamic error method of inspection according to claim 1~6 any one, it is characterised in that first data
For the data related to the physical location of the cutter location of the Digit Control Machine Tool under the NC Machine Tools Coordinate system；Described second
Data are the data related to the offset of the probe under the gauge head coordinate system.
9. a kind of dynamic error verifying attachment of Digit Control Machine Tool, including：
Display；
Processor, can carry out following processing：
Spy from Digit Control Machine Tool acquisition first data related to the physical location of the cutter location of the Digit Control Machine Tool and with gauge head
The second related data of the offset of pin；
First data and second data are handled, by first data and second data convert into work
Theoretical Path under part coordinate system, and actual cutter spacing rail is obtained based on the theoretical Path and second data
Mark；
By the relatively theoretical Path and the actual Path, the theoretical Path and the reality are obtained
Error between Path, obtains the dynamic error of the Digit Control Machine Tool.
10. dynamic error verifying attachment according to claim 9, it is characterised in that
First data are scanned measurement by the outline along the good workpiece of digital control processing and obtained.
11. dynamic error verifying attachment according to claim 10, it is characterised in that
With with described in digital control processing during workpiece identical feed speed and with processing when cutter path identical movement locus pair
The outline of the workpiece is scanned measurement.
12. the dynamic error verifying attachment according to claim 9~11, it is characterised in that the actual Path leads to
Cross and obtain the theoretical Path plus the offset data of the probe of the gauge head.
13. the dynamic error method of inspection according to claim 9~11 any one, it is characterised in that first number
According to for the data related to the physical location of the cutter location of the Digit Control Machine Tool under NC Machine Tools Coordinate system；Second number
According to for the data related to the offset of the probe under gauge head coordinate system.
14. a kind of Digit Control Machine Tool that can be used in dynamic error inspection, including：Numerical control device, servo drive, signal monitoring
Harvester, gauge head and main shaft；
The numerical control device, the operation of the associated components for controlling the Digit Control Machine Tool；
The signal monitoring harvester, is connected to sensing equipment, the digital quantity and/or analog quantity transmitted for read-write sensor
Signal；
The servo drive is used for the digital quantity signal for receiving the signal monitoring harvester, and exports the mould
Analog quantity signal controls the motion of the servomotor of the main shaft；
The gauge head is installed on the main shaft, service data and the gauge head self-operating number for gathering the main shaft
According to, and send the data gathered to the signal monitoring harvester.
15. Digit Control Machine Tool according to claim 14, in addition to：Ups power, for the numerical control device and described stating
The input/output module of signal monitoring harvester is powered.
16. Digit Control Machine Tool according to claim 14, it is characterised in that the signal monitoring harvester be based on
STM32 analog quantity high-speed data acquisition I/O modules.
17. Digit Control Machine Tool according to claim 14, it is characterised in that the gauge head is three-dimensional scanning type gauge head, described
The probe of gauge head has certain range on space three-dimensional direction, and the movement in each direction of probe can have sine and cosine simulation
Measure the output of signal.
18. Digit Control Machine Tool according to claim 14, it is characterised in that the signal monitoring harvester passes through AD/DA
The input for converting the sensor and the servo driving device and the sensor and the signal monitoring harvester is defeated
The data communication transmission gone out between module.
19. the Digit Control Machine Tool according to claim 14~18 any one, it is characterised in that the numerical control device is prepared
Gauge head exceedes range protection module, and when the range of the gauge head reaches excess of stroke critical condition, the numerical control device sends the excess of stroke
Control signal, controls the operation of the corresponding component of the Digit Control Machine Tool.
20. Digit Control Machine Tool according to claim 19, it is characterised in that when the range of the gauge head reaches the critical bar of the excess of stroke
During part, the numerical control device sends excess of stroke control signal, controls the operation of the locked main shaft of Digit Control Machine Tool.
21. the Digit Control Machine Tool according to claim 14~18 any one, it is characterised in that the gauge head has excess of stroke guarantor
Unit is protected, when the range of the gauge head reaches excess of stroke critical condition, excess of stroke alarm signal is sent.
22. a kind of gauge head that can be used in dynamic error inspection, including：Gauge head body and probe；The gauge head body has super
Journey protection location, can send excess of stroke signal in the displacement excess of stroke of the gauge head.
23. gauge head according to claim 22, it is characterised in that the probe can by the machined surface of workpiece of fitting,
Measurement is scanned to the outline of the workpiece, probe itself is inclined described in the physical location for the cutter location for gathering Digit Control Machine Tool
Shifting amount.
24. gauge head according to claim 22, it is characterised in that the overtravel protection unit reaches in the range of the gauge head
During to excess of stroke critical condition, excess of stroke alarm signal is sent.
25. the gauge head according to claim 22~24 any one, it is characterised in that the excess of stroke signal is sent to number
The numerical control device of lathe is controlled, the numerical control device sends excess of stroke control signal based on the excess of stroke signal, controls the numerical control machine
The operation of the corresponding component of bed.
26. gauge head according to claim 25, it is characterised in that the numerical control device sends super based on the excess of stroke signal
Process control signal, controls the operation of the locked main shaft of Digit Control Machine Tool.
27. a kind of storage medium, it is characterised in that store the program for making at least one processor be able to carry out following operation：
Spy from Digit Control Machine Tool acquisition first data related to the physical location of the cutter location of the Digit Control Machine Tool and with gauge head
The second related data of the offset of pin；
First data and second data are handled, by first data and second data convert into work
Theoretical Path under part coordinate system, and actual cutter spacing rail is obtained based on the theoretical Path and second data
Mark；
By the relatively theoretical Path and the actual Path, the theoretical Path and the reality are obtained
Error between Path, obtains the dynamic error of the Digit Control Machine Tool.
28. storage medium according to claim 27, it is characterised in that
First data are scanned measurement by the outline along the good workpiece of digital control processing and obtained.
29. storage medium according to claim 27, it is characterised in that
With with described in digital control processing during workpiece identical feed speed and with processing when cutter path identical movement locus pair
The outline of the workpiece is scanned measurement.
30. the storage medium according to claim 27~29 any one, it is characterised in that the actual Path leads to
Cross and obtain the theoretical Path plus the offset data of the probe of the gauge head.
31. the storage medium according to claim 27~29 any one, it is characterised in that first data are in number
Control the data related to the physical location of the cutter location of the Digit Control Machine Tool under lathe coordinate system；Second data are to survey
The data related to the offset of the probe under head coordinate system.
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| CN201610407659.8A CN105945649A (en) | 2016-06-12 | 2016-06-12 | Five-axis computer numerical control machine tool dynamic error detection method based on S-shaped detection test piece |
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| CN201710438895.0A Active CN107085409B (en) | 2016-06-12 | 2017-06-12 | A kind of the dynamic error method of inspection and device of numerically-controlled machine tool |
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| 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 |
| CN108388201B (en) * | 2018-04-17 | 2020-12-22 | 潍坊学院 | Automatic detection early warning system of numerical control machine tool and operation method thereof |
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|---|---|
| CN107085409B (en) | 2019-05-21 |
| CN105945649A (en) | 2016-09-21 |
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