CN108073131A - The mirror image Milling Process real-time non-cpntact measurement of covering pattern error and compensation device and skin thickness accuracy control method - Google Patents
The mirror image Milling Process real-time non-cpntact measurement of covering pattern error and compensation device and skin thickness accuracy control method Download PDFInfo
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- CN108073131A CN108073131A CN201711307629.0A CN201711307629A CN108073131A CN 108073131 A CN108073131 A CN 108073131A CN 201711307629 A CN201711307629 A CN 201711307629A CN 108073131 A CN108073131 A CN 108073131A
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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
- G05B19/401—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 measuring, e.g. calibration and initialisation, measuring workpiece for machining purposes
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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
- G05B2219/37398—Thickness
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Abstract
The invention discloses a kind of real-time non-cpntact measurement of mirror image Milling Process covering pattern error and compensation device and skin thickness accuracy control method, device includes non-contact measurement module and data processing compensating module；Non-contact measurement module includes the laser displacement sensor controller of the measurement data of two laser displacement sensor heads of two laser displacement sensor heads and acquisition；Data processing compensating module includes coordinate biasing module built in machine tool numerical control system and measurement data is handled, and coordinate biasing module realizes the data analysis module compensated automatically of skin morph in processing according to built in handling result calls machine tool numerical control system.The present invention only needs to store the dynamic measuring data between a certain moment measurement point and processing stand, read a data, generate an offset, then process, discharge the storage of this data, storage data quantity is small, avoids and single-piece skin cloud data is handled and is fitted, and greatly reduces data processing, the time of feedback control.
Description
Technical field
The present invention relates to a kind of mechanical processing thickness precise control devices and method more particularly to one kind to be used for mirror image milling
The thickness precise control device and method of processing, the specifically real-time non-cpntact measurement of mirror image Milling Process covering pattern error
With compensation device and skin thickness accuracy control method.
Background technology
Mirror image milling technology is a new technology for the processing of aircraft skin digital control milling, and mirror image Milling Machining system is by two
The Five Axis horizontal machine tool composition being synchronized with the movement.The main shaft of wherein one horizontal machine tool is processing head, and installation milling cutter processes covering,
Another five-axis machine tool main shaft is branch fastener, and installation support column support covering, milling cutter and support column are synchronously transported on same normal
It is dynamic.In process, milling cutter and support column are opposite to the both ends of covering workpiece always, and the distance between milling cutter and support column are
Definite value, this definite value are covering processing thickness.This method is always supported covering area to be machined, ensure that covering is added
Work area domain have enough rigidity, it can be achieved that covering processing after residual thickness accurate control.
The existing process flow of mirror image milling is：First by the horizontal placement of covering, the periphery of covering is filled by laser positioning
Folder, is allowed to clamping in gripper frame, and then flexible clamping frame crouches-stand through revolving platform and overturns automatically, and enters Processing Room.Processing Room
It is made of laser scanning system and mirror image milling system of processing, laser scanning system is used for the scanning of part exact shape, scanning
Actual scanning data and part gross data are subjected to comparison amendment afterwards, generates and performs processing program, complete mirror image milling and
Drilling operation.Covering after processing is returned and dismantled by gripper frame automatic transport.
In Processing Room, due to being influenced by skin material roll bending or stretch forming error, clamping deformation etc., the actual type of covering
Face and theoretical profile generate deviation, are processed according to theoretical profile processing program, then generate larger wall thickness deviation, cause to process
Part is unqualified.Therefore, it is necessary to use On-machine Test and reverse forming technique, covering actual processing shape is obtained, and to original
Processing program carries out second-order correction, and the wall thickness of the non-processing deformation generation such as final solution raw material formed profile error and dead weight is inclined
Poor problem improves processing quality.
The prior art has the following disadvantages：Since skin shape size is big, the data volume of measurement is big, therefore in laser scanning
When, simply limited point is measured, the actual type face cloud data of covering is obtained, data is handled and are fitted,
Actual type face is formed, precision is low.In addition, existing process flow covering milling processing before, without the thickness information actually measured, though
Right mirror image milling can ensure that equal thickness is processed, but often there are larger differences with theoretical digital-to-analogue for supporting surface.It is online to carry out ultrasonic survey
When thick, thickness data can be caused to lose, online compensation can not be carried out there are support column and workpiece disengaging.
The content of the invention
According to the technical issues of set forth above, and provide a kind of mirror image Milling Process covering pattern error non-contact survey in real time
Amount and compensation device and skin thickness accuracy control method.The technological means that the present invention uses is as follows：
A kind of real-time non-cpntact measurement of mirror image Milling Process covering pattern error and compensation device, including non-contact measurement
Module and data processing compensating module；
The non-contact measurement module includes two laser displacement sensor heads and the laser displacement of acquisition two passes
The laser displacement sensor controller of the measurement data of sensor head；
Two laser displacement sensor heads are separately fixed at milling cutter terminal pad with milling cutter and with support columns
In support column terminal pad, the milling cutter terminal pad and the support column terminal pad respectively with mirror image milling machine tool processing head and mirror image milling
Lathe branch fastener connects, the axis of the axis and the support column in the support column terminal pad of the milling cutter in the milling cutter terminal pad
Overlap, the laser beam that two laser displacement sensor heads are oppositely arranged and emits is located along the same line, the straight line and
The axis of the milling cutter is parallel, i.e., the distance between constant；
The data processing compensating module includes coordinate biasing module built in machine tool numerical control system and to from the laser position
The measurement data for two laser displacement sensor heads that displacement sensor controller imports is handled, and according to handling result
Coordinate biasing module built in the machine tool numerical control system is called to realize the data analysis mould compensated automatically of skin morph in processing
Block.
The data analysis module is PC ends.
The invention also discloses a kind of according to mirror image Milling Process covering pattern error non-contact survey in real time described above
The method that amount is accurately controlled with compensation device progress skin thickness, has following steps：
S1, machining locus program is generated according to processing request；
The cutting depth of S2, the initial milling cutter of setting, start machining locus program；
S3, initialize two laser displacement sensor heads measurement point between distance；
S4, set by the supporting point between the support column and covering and vertically with the plane of the axis of the milling cutter as branch
Support face, straight line covering opposite with the axis of the milling cutter are synchronized with the movement along machining locus, two laser displacement sensings
Device head measures covering by the initial position of machining locus, and the laser displacement sensor controller gathers two laser positions
The measurement data of displacement sensor head, and import the data analysis module, the data analysis module to measurement data at
Reason, obtains the handling result of skin thickness, and stores；
On the basis of the supporting surface, the initial position that the milling cutter reaches machining locus rises, according to obtained corresponding positions
The skin thickness put, the data analysis module call coordinate biasing module built in the machine tool numerical control system to realize and are covered in processing
The automatic compensation of skin deformation carries out correction program to the cutting-in of the milling cutter, covering residual thickness is made to reach requirement, afterwards, is released
Put the storage of the skin thickness of the position.
It is first measured along machining locus, post-processing, two laser displacement sensor heads and the milling cutter, the support column
It is synchronized with the movement with respect to covering, thus, it is only required to store dynamic measuring data (the covering thickness between a certain moment measurement point and processing stand
Degree), a data are read, an offset is generated, then processes, discharge the storage of this data, storage data quantity is small, keeps away
Exempt from that single-piece skin cloud data is handled and is fitted, greatly reduced data processing, the time of feedback control.
In the step S3, the distance between the measurement point of two laser displacement sensor heads is initialized, is had as follows
Step：Be put between two laser displacement sensor heads one with the straight line gauge block known to vertical and thickness, two
The measurement point of the laser displacement sensor head is located at the upper and lower surface of the gauge block respectively, using the upper surface as survey
Reference plane in amount using the lower surface as the lower reference plane of measurement, two laser displacement sensor heads is reset, initialization two
Distance between the measurement point of a laser displacement sensor head.
In the step S4, the measurement data of two laser displacement sensor heads is：For with base in the measurement
Position to be processed on the quasi- corresponding laser displacement sensor head measurement machining locus in face, if its measurement point is in the survey
In amount more than reference plane, then its registration is just and records its registration, if its measurement point in the measurement below reference plane,
Registration is to bear and record its registration；
For with being treated on the corresponding laser displacement sensor head measurement machining locus of reference plane under the measurement
Working position, if its measurement point, under the measurement more than reference plane, registration is negative and record its registration, if its measurement point
Under the measurement below reference plane, then its registration is just and records its registration.
In the step S4, the skin thickness of certain position is equal to the registration of the laser displacement sensor head of the position two
The sum of add the gauge block thickness.
Compared with prior art, beneficial effects of the present invention are as follows：
1st, since the present invention directly measures the skin thickness of machining area, milling cutter and support are adjusted in real time by feedback control
Column position, covering residual thickness after accurate control processing, improves machining accuracy.
2nd, the present invention only needs to store dynamic measuring data (skin thickness) between a certain moment measurement point and processing stand i.e.
Can, a data are read, an offset is generated, then processes, discharge the storage of this data, storage data quantity is small, avoids
Single-piece skin cloud data is handled and is fitted, greatly reduces data processing, the time of feedback control.
3rd, two laser displacement sensor heads are separately fixed at milling cutter terminal pad with milling cutter and with support columns
Support column terminal pad on, without additional control system, control difficulty is small.
4th, correction program adjustment is carried out to the cutting-in of milling cutter in real time according to covering, cutting ginseng can be optimized to the greatest extent
Number improves processing efficiency.
5th, when covering blank shape precision is higher, it is convenient to omit " the face laser scanning of covering shape " step is carried out in Processing Room
Suddenly, directly it is processed, simplification of flowsheet.
The present invention can be widely popularized in fields such as covering mirror image millings for the foregoing reasons.
Description of the drawings
It in order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to do simply to introduce, it should be apparent that, the accompanying drawings in the following description is this hair
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the mirror image Milling Process real-time non-cpntact measurement of covering pattern error and benefit in specific embodiment of the invention
Repay the structure diagram of device.
Fig. 2 is two laser displacement sensor heads initialization and instrumentation plan in specific embodiment of the invention.
Fig. 3 is to handle covering upper and lower surface physical location and skin thickness schematic diagram in the specific embodiment of the present invention.
Fig. 4 is machining locus schematic diagram in specific embodiment of the invention.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
All other embodiments obtained without making creative work belong to the scope of protection of the invention.
Embodiment 1
As shown in Figure 1, a kind of real-time non-cpntact measurement of mirror image Milling Process covering pattern error and compensation device, including non-
Contact type measurement module 1 and data processing compensating module 2；
The non-contact measurement module 1 includes two laser displacements of two laser displacement sensors first 3 and acquisition
The laser displacement sensor controller 4 of the measurement data of sensor head 3；
Two laser displacement sensors first 3 are separately fixed at the milling cutter terminal pad 6 with milling cutter 5 (for mirror image milling machine
The c-axis of bed) and have in the support column terminal pad 8 (for the c ' axis of mirror image milling machine tool) of support column 7,6 He of milling cutter terminal pad
The support column terminal pad 8 is connected respectively with mirror image milling machine tool processing head 9 and mirror image milling machine tool branch fastener 10, the milling cutter connection
The axis of milling cutter 5 on disk 6 is overlapped with the axis of the support column 7 in the support column terminal pad 8, and two laser displacements pass
The laser beam that sensor first 3 is oppositely arranged and emits is located along the same line, and the straight line is parallel with the axis of the milling cutter 5；
The data processing compensating module 2 includes coordinate biasing module 11 built in machine tool numerical control system and to from the laser
The measurement data for two laser displacement sensors first 3 that displacement sensor controller 4 imports is handled, and according to processing
Coordinate biasing module 11 built in machine tool numerical control system described in call by result realizes the number compensated automatically that covering 12 deforms in processing
According to analysis module 13.
The data analysis module 13 is PC ends.
Embodiment 2
As Figure 1-Figure 4, a kind of mirror image Milling Process covering pattern error according to embodiment 1 is non-contact in real time
The method that measurement is accurately controlled with compensation device progress skin thickness, has following steps：
S1, machining locus program is generated according to processing request；
The cutting depth of S2, the initial milling cutter 5 of setting, start machining locus program；
S3, initialize two laser displacement sensors first 3 measurement point between distance；
S4, set by the supporting point between the support column 7 and covering 12 and the vertical plane with the axis of the milling cutter 5
For supporting surface, straight line covering 12 opposite with the axis of the milling cutter 5 is synchronized with the movement along machining locus, two laser positions
Displacement sensor first 3 measures covering 12 by the initial position of machining locus, and the laser displacement sensor controller 4 gathers two
The measurement data of the laser displacement sensor first 3, and the data analysis module 13 is imported, the data analysis module 13 is right
Measurement data is handled, and is obtained the handling result of 12 thickness of covering, and is stored；
On the basis of the supporting surface, the initial position that the milling cutter 5 reaches machining locus rises, according to obtained corresponding positions
12 thickness of covering put, the data analysis module 13 call the realization of coordinate biasing module 11 built in the machine tool numerical control system to add
The automatic compensation that covering 12 deforms in work carries out correction program to the cutting-in of the milling cutter 5, and reaching 5 residual thickness of covering will
It asks, afterwards, discharges the storage of 12 thickness of covering of the position.
In the step S3, the distance between the measurement point of two laser displacement sensors first 3 is initialized, is had as follows
Step：Be put between two laser displacement sensors first 3 one with the straight line gauge block 14 known to vertical and thickness, two
The measurement point of a laser displacement sensor first 3 is located at the upper and lower surface of the gauge block 14 respectively, with the upper table
Face is the upper reference plane 15 of measurement, using the lower surface as the lower reference plane 16 of measurement, two laser displacement sensors first 3 are clear
Zero, initialize the distance between the measurement point of two laser displacement sensors first 3.
In the step S4, the measurement data of two laser displacement sensors first 3 is：For with base in the measurement
Position to be processed on the quasi- corresponding first 3 measurement machining locus of laser displacement sensor in face 15, if its measurement point is in institute
The upper reference plane more than 15 of measurement is stated, then its registration is just and records its registration, if its measurement point reference plane 15 in the measurement
Hereinafter, then its registration is to bear and record its registration；
For being measured with the corresponding laser displacement sensor first 3 of reference plane 16 under the measurement on machining locus
Position to be processed, if its measurement point reference plane more than 16 under the measurement, registration is bears and records its registration, if it is surveyed
Amount point reference plane below 16 under the measurement, then its registration is just and records its registration.
In the step S4, the 12 thickness L of covering of certain position is equal to the laser displacement sensor first 3 of the position two
The sum of registration (L1+L2) adds the thickness L0 of the gauge block 14.
When being machined at inflection point C, the milling cutter terminal pad 6 and the support column terminal pad 8 are rotated synchronously at this time, ensure two
A laser displacement sensor first 3 measures the actual (real) thickness of a bit of fixed position in front of machining locus always.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe is described in detail the present invention with reference to foregoing embodiments, it will be understood by those of ordinary skill in the art that：Its according to
Can so modify to the technical solution recorded in foregoing embodiments either to which part or all technical characteristic into
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is not made to depart from various embodiments of the present invention technology
The scope of scheme.
Claims (6)
1. a kind of real-time non-cpntact measurement of mirror image Milling Process covering pattern error and compensation device, which is characterized in that including non-
Contact type measurement module and data processing compensating module；
The non-contact measurement module includes two laser displacement sensors of two laser displacement sensor heads and acquisition
The laser displacement sensor controller of the measurement data of head；
Two laser displacement sensor heads are separately fixed at the milling cutter terminal pad with milling cutter and the support with support column
In column terminal pad, the milling cutter terminal pad and the support column terminal pad respectively with mirror image milling machine tool processing head and mirror image milling machine tool
Branch fastener connects, the axis weight of the axis and the support column in the support column terminal pad of the milling cutter in the milling cutter terminal pad
It closes, the laser beam that two laser displacement sensor heads are oppositely arranged and emit is located along the same line, the straight line and institute
The axis for stating milling cutter is parallel；
The data processing compensating module includes coordinate biasing module built in machine tool numerical control system and to being passed from the laser displacement
The measurement data for two laser displacement sensor heads that sensor controller imports is handled, and is called according to handling result
Coordinate biasing module built in the machine tool numerical control system realizes the data analysis module compensated automatically of skin morph in processing.
2. the real-time non-cpntact measurement of mirror image Milling Process covering pattern error according to claim 1 and compensation device,
It is characterized in that：The data analysis module is PC ends.
3. a kind of real-time non-cpntact measurement of mirror image Milling Process covering pattern error according to claim 1 and compensation device
Carry out the method that skin thickness accurately controls, it is characterised in that there are following steps：
S1, machining locus program is generated according to processing request；
The cutting depth of S2, the initial milling cutter of setting, start machining locus program；
S3, initialize two laser displacement sensor heads measurement point between distance；
S4, set by the supporting point between the support column and covering and vertically with the plane of the axis of the milling cutter as support
Face, straight line covering opposite with the axis of the milling cutter are synchronized with the movement along machining locus, two laser displacement sensors
Head measures covering by the initial position of machining locus, and the laser displacement sensor controller gathers two laser displacements
The measurement data of sensor head, and the data analysis module is imported, the data analysis module handles measurement data,
The handling result of skin thickness is obtained, and is stored；
On the basis of the supporting surface, the initial position that the milling cutter reaches machining locus rises, according to obtained corresponding position
Skin thickness, the data analysis module call coordinate biasing module built in the machine tool numerical control system to realize that covering becomes in processing
The automatic compensation of shape carries out correction program to the cutting-in of the milling cutter, covering residual thickness is made to reach requirement, and afterwards, release should
The storage of the skin thickness of position.
4. according to the method described in claim 3, it is characterized in that：In the step S3, two laser displacements are initialized
Distance between the measurement point of sensor head has following steps：Be put between two laser displacement sensor heads one with
The straight line is vertical and thickness known to gauge block, the measurement point of two laser displacement sensor heads is located at the gauge block respectively
Upper and lower surface, using the upper surface as the upper reference plane of measurement, using the lower surface for measurement reference plane down, by two
The laser displacement sensor head is reset, and initializes the distance between the measurement point of two laser displacement sensor heads.
5. according to the method described in claim 4, it is characterized in that：In the step S4, two laser displacement sensors
Head measurement data be：For measuring machining locus with the corresponding laser displacement sensor head of reference plane in the measurement
On position to be processed, if its measurement point in the measurement more than reference plane, registration just and to record its registration, if its
Measurement point is in the measurement below reference plane, then its registration is to bear and record its registration；
It is to be processed on machining locus for being measured with the corresponding laser displacement sensor head of reference plane under the measurement
Position, if its measurement point, under the measurement more than reference plane, registration is negative and record its registration, if its measurement point is in institute
It states below the lower reference plane of measurement, then its registration is just and records its registration.
6. according to the method described in claim 5, it is characterized in that：In the step S4, the skin thickness of certain position is equal to should
The sum of registration of the laser displacement sensor head of position two adds the thickness of the gauge block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711307629.0A CN108073131B (en) | 2017-12-11 | 2017-12-11 | Mirror milling skin appearance error real-time non-contact measurement and compensation device and skin thickness accurate control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711307629.0A CN108073131B (en) | 2017-12-11 | 2017-12-11 | Mirror milling skin appearance error real-time non-contact measurement and compensation device and skin thickness accurate control method |
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| Publication Number | Publication Date |
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| CN108073131A true CN108073131A (en) | 2018-05-25 |
| CN108073131B CN108073131B (en) | 2020-09-29 |
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| CN201711307629.0A Active CN108073131B (en) | 2017-12-11 | 2017-12-11 | Mirror milling skin appearance error real-time non-contact measurement and compensation device and skin thickness accurate control method |
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| CN114700813A (en) * | 2022-03-14 | 2022-07-05 | 金洲精工科技(昆山)有限公司 | Method for quickly positioning tool nose of cylindrical end mill in circumferential direction |
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| Publication number | Publication date |
|---|---|
| CN108073131B (en) | 2020-09-29 |
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