CN105270702A - Uniform-thickness machining device and method for spherical crown face box bottom foam plastics of large-diameter thin-wall box - Google Patents
Uniform-thickness machining device and method for spherical crown face box bottom foam plastics of large-diameter thin-wall box Download PDFInfo
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Abstract
The invention relates to a uniform-thickness machining device and method for spherical crown face box bottom foam plastics of a large-diameter thin-wall box. The device comprises a rotating and positioning ring, a box supporting, rotating and positioning device, a three-axis numerical control machining device, a numerical control system, a spherical crown face box bottom metal surface morphology data measuring system, a computer system, a data acquisition module, a data pre-processing module and a numerical control machining software CAD/CAM module; the data acquisition module is embedded in the numerical control system; and the data pre-processing module and the numerical control machining software CAD/CAM module are embedded in the computer system. The device and method solve the uniform-thickness machining problem of foam plastics sprayed on the box spherical crown face, and it is verified and indicated through practical application that the requirements for surface smoothness and uniform thickness are met when the method is used for performing numerical control form copying on foam plastics sprayed at the spherical crown face box bottom.
Description
Technical field
The present invention relates to a kind of foamed plastic uniform thickness processing unit (plant) and method at the bottom of spherical crown surface case of large diameter thin wall casing, the processing of type uniform thickness is imitated for the numerical control of foamed plastic at the bottom of the spherical crown surface case of large diameter thin wall casing, realize the foamed plastic uniform thickness processing of spherical crown surface spraying at the bottom of case, to meet the requirement being sprayed on spherical crown surface foamed plastic equal thickness at the bottom of case.
Background technology
Thin-wall box body is made up of sheet metal welding, physical dimension comparatively large (diameter is about Φ 2m ~ Φ 5m, and length is about 3m ~ 20m).Casing was made up of two ends and cylindrical section, and two ends were the spherical crown surface of evagination, and cylindrical section is smooth surface.Spray one deck foamed plastic at two end spherical crown outside faces, due to sprayed-on plastic foam process characteristic, the foam surface after spraying is concavo-convex and unsmooth, and thickness is between 40mm ~ 80mm.The engineering factor of thin-wall box body requires that two end foamed plastic mean thicknesss are
, and do not allow to exist the region that topical foams plastic thickness is less than 30mm.
At the bottom of the case of thin-wall box body, theoretical curved surface is spherical crown surface, and because there is moderate finite deformation in weld forming process, spherical crown surface at the bottom of case need by free form surface process.Outside face at the bottom of case has the oblong of many places 55mm × 20mm size protruding, and height flushes with the foamed plastic after processing; And there are many places higher than the cylindrical protrusions of Foam Plastic Surface, upperlimit Φ 600 × 200mm.
At present, the mode that operator uses the manual sheet of self-control cutter to cut is carried out uniform thickness to the foamed plastic after spraying at the bottom of case and is repaiied type by hand, and work efficiency is low, and labour intensity is large.Realize the requirements for quality to foam equal thickness and surface finish, quite high requirement is proposed to the technical merit of operator.For improving equal thickness work efficiency and surface quality, proposing to adopt job operation of the present invention, adopting numerical control to imitate the processing of type uniform thickness to the spherical crown surface foamed plastic at thin-wall box body two end, yet there are no the report of head it off both at home and abroad.
Summary of the invention
Technology of the present invention is dealt with problems: overcome the deficiencies in the prior art, there is provided a kind of foamed plastic uniform thickness processing unit (plant) and method at the bottom of spherical crown surface case of large diameter thin wall casing, type uniform thickness processing problems is imitated in the foamed plastic numerical control solved at the bottom of large diameter thin wall casing spherical crown surface case.
The present invention solves the technical scheme of its technical matters: foamed plastic uniform thickness processing unit (plant) at the bottom of a kind of spherical crown surface case of large diameter thin wall casing, comprise: rotate steady ring, case supports rotary positioning apparatus, three-axis numerical control Fabricating machinery, digital control system, spherical crown surface case substrate surface topography data measuring system, computer system, data acquisition module, data preprocessing module and NC Machining Software CAD/CAM module, data acquisition module is embedded in digital control system, and data preprocessing module and NC Machining Software CAD/CAM Module-embedding are in computer systems, which; Rotate steady ring to use in pairs, be arranged on the shell of column two ends of large diameter thin wall casing respectively, as the benchmark installing and rotate location; By installing the large diameter thin wall casing handling of rotation steady ring on case supports rotary positioning apparatus, drive large diameter thin wall body pivot by case supports rotary positioning apparatus; Spherical crown surface case substrate surface topography data measuring system comprises distance measuring sensor and anchor fitting, distance measuring sensor is arranged on the front end of spindle of three-axis numerical control Fabricating machinery by anchor fitting, distance measuring sensor together with main shaft with the concentric circles at the spherical crown surface Xiang Di center of large diameter thin wall casing for track rotates, data collecting module collected distance measuring sensor measure concentric circles on spherical crown surface metal surface shape characteristic data; Spherical crown surface metal surface shape characteristic data are reached computer system by digital control system; During this period, by sprayed-on plastic foam at the bottom of spherical crown surface case; After spherical crown surface metal surface shape characteristic data are carried out pretreatment by the data preprocessing module in computer system, reverse shaping by the CAD software in NC Machining Software CAD/CAM module again, present spherical crown surface metal surface model, then generate uniform thickness work programme by CAM; Computing machine sends uniform thickness processing program code to digital control system again, and the foamed plastic uniform thickness automatically realized at the bottom of to spherical crown surface case by digital control system control three-axis numerical control Fabricating machinery is processed.
In described data preprocessing module, pretreatment comprises filtering process, and the noise data namely in spherical crown surface metal surface shape characteristic data comprises measurement noises data, and after filtering process, rejecting protruding data also level and smooth to above-mentioned noise data is new data; Protrusion data in the shape characteristic data of spherical crown surface metal surface are also carried out respective handling according to above-mentioned noise data, namely rejecting protruding data also level and smooth is new data simultaneously.
Protruding data for new data detailed process be smoothly are rejected: adopt circle rate method to carry out fairing processing according to the noise data in the shape characteristic data of spherical crown surface metal surface, fairing at the beginning of fairing processing is divided into and with nothing left suitable after described noise data filtering process; First fairing makes spherical crown surface metal surface tentatively smooth; With nothing left along being make spherical crown surface metal surface smooth further again on the basis of first fairing; And the spherical crown surface metal surface shape characteristic data after fairing processing are stored.
In described NC Machining Software CAD/CAM module, CAD software is reverse shaping, and present spherical crown surface metal surface model, specific implementation process is as follows:
(1) read in pretreated spherical crown surface metal surface shape characteristic data, generate each section line of spherical crown surface metal surface, by each section line smooth transition, and ensure the continuous of each section of section line, obtain one group of space curve;
(2) space curve is generated curved surface, obtain the curve form of spherical crown surface metal surface, carry out protrusion superposition again, because of size, the shape difference of protrusion, envelope cylinder is adopted to substitute protrusion, carry out solid modelling according to the cylindrical diameter of envelope, height with position data, protrusion is added on curved surface, present spherical crown surface metal surface model.
In described NC Machining Software CAD/CAM module, CAM generates uniform thickness work programme, specific implementation process is as follows: according to the curved surface of spherical crown surface metal surface model, the enveloping surface that Tool in Cutting point is formed in working angles and the Surface Offset of spherical crown surface metal surface are processed, and form uniform thickness work programme.
Tap to prevent Tool in Cutting and encounter spherical crown surface metal surface, before reality processing, the test of analogue simulation data mart modeling is carried out on the computer screen to generation uniform thickness work programme, whether simulation numerical control machining process of the test, observe cutter and can collide with the protrusion on spherical crown surface metal surface and spherical crown surface metal surface, if there is collision, amendment cutter cutter lifting height, until collisionless occurs, finally, numerical control program errorless for emulation input digital control system is prepared processing.
The shape characteristic data of spherical crown surface metal surface are transmitted through the network to computer system by described digital control system; Computer system sends uniform thickness processing program code to digital control system by ethernet again.
When space curve is generated curved surface, because the node of every bar curve is a lot, the speed of surface forming may be very slow, be head it off, and on the cross section of getting each spherical crown surface metal surface, the quantity of interpolation point is consistent, and is evenly distributed.
Described distance measuring sensor is high precision i.e. 10 mum laser distance measuring sensors.
A foamed plastic uniform thickness job operation at the bottom of the spherical crown surface case of large diameter thin wall casing, performing step is as follows:
The first step: casing is installed and location: swivel eye uses in pairs, takes locate mode to be arranged on the two ends of casing respectively; To the casing handling of swivel eye be installed on case supports slewing arrangement, swivel eye is contacted completely with driving support wheel, and is supported by support wheel and locate; By driving the friction-driven of support wheel and swivel eye, the calibration realizing casing rotates and location;
Second step: spherical crown surface case substrate surface topography data measuring system comprises distance measuring sensor and anchor fitting, distance measuring sensor is arranged on the front end of spindle of three-axis numerical control Fabricating machinery by anchor fitting, distance measuring sensor together with main shaft with the concentric circles at the spherical crown surface Xiang Di center of large diameter thin wall casing for track rotates, data collecting module collected distance measuring sensor measure concentric circles on spherical crown surface metal surface shape characteristic data
3rd step: spherical crown surface metal surface shape characteristic data are reached computer system by digital control system; During this period, casing enters foamed plastic spray station, by sprayed-on plastic foam at the bottom of spherical crown surface case; After spherical crown surface metal surface shape characteristic data are carried out pretreatment by the data preprocessing module in computer system.
4th step: pretreated spherical crown surface metal surface shape characteristic data, undertaken reverse shaping by NC Machining Software CAD/CAM module again, present the surface model of spherical crown surface metal surface, generate uniform thickness work programme, simulate NC Machining Process on computers, observe cutter and whether can collide with the protrusion on casing, if there is collision, amendment cutter cutter lifting height, until collisionless occurs;
5th step: computing machine sends uniform thickness processing program code to digital control system again;
6th step: the foamed plastic uniform thickness automatically realized at the bottom of to spherical crown surface case by digital control system control three-axis numerical control Fabricating machinery is processed.
The present invention's advantage is compared with prior art:
(1) processing of type uniform thickness is imitated in the foamed plastic numerical control that present invention achieves spraying at the bottom of major diameter spherical crown surface case, to meet the requirement being sprayed on spherical crown surface foamed plastic equal thickness at the bottom of case.From " casing installation swivel eye " to " at the bottom of case, foamed plastic numerical control uniform thickness is contoured " process in the present invention, the engineering factor meeting large diameter thin wall casing requires the needs with construction technology, efficiently solve the accuracy requirement spherical crown surface foamed plastic numerical control at big case body two end being imitated to the processing of type uniform thickness, use proof to have good cost performance through reality.
(2) the present invention adopts high precision (10 microns) laser range sensor, measure spherical crown surface shape characteristic data, the CAD/CAM software technology of application, the technological means such as filtering will be taked to the characteristic data gathered, strange number strong point being judged effectively and rejects, ensureing against obtaining the spherical crown surface model come consistent with actual FREEFORM SURFACE MODEL.
(4) show through practice checking, application the present invention carries out numerical control to the foamed plastic be sprayed at the bottom of spherical crown surface case and is contoured, and meets the requirement of surface finish and equal thickness completely.
Accompanying drawing illustrates:
Fig. 1 is profile at the bottom of the spherical crown surface case of large diameter thin wall casing and swivel eye assembly schematic diagram;
Fig. 2 is processing unit (plant) structure of the present invention composition schematic diagram;
Fig. 3 is job operation realization flow figure of the present invention;
Fig. 4 is that spherical crown surface at the bottom of case of the present invention is by profile data acquisition diagram of curves during free form surface process;
Fig. 5 comprises protrusion data and rejecting and design sketch after filling smoothed data at the bottom of case of the present invention
Fig. 6 is that in the present invention, image data removes three-dimensional curve diagram before burr;
Fig. 7 is that in the present invention, image data removes three-dimensional curve diagram after burr;
Fig. 8 is the three-dimensional curve diagram after image data filtering, the smoothing of data at the bottom of raising middle flask of the present invention;
Fig. 9 is that spherical crown surface data and curves figure at the bottom of case is read in Computer CAD/CAM of the present invention display;
Figure 10 is that Computer CAD/CAM of the present invention shows against asking model curved surface figure
Figure 11 is that Computer CAD/CAM software of the present invention is against asking model curved surface protrusion overlay chart;
Figure 12 is the actual tool track of Computer simulating, verifying work programme of the present invention.
Detailed description of the invention:
As shown in Figure 1, large diameter thin wall casing to comprise at the bottom of two spherical crown surface casees 1,6 and shell of column 4, has protrusion 2 at the bottom of spherical crown surface case, is separately installed with rotates steady ring 3,5 at the two ends of shell of column 4.
As shown in Figure 2, Figure 3, Figure 4, processing unit (plant) of the present invention, comprise: rotate steady ring 3,5, case supports rotary positioning apparatus 7, three-axis numerical control Fabricating machinery 8, digital control system 9, spherical crown surface case substrate surface topography data measuring system 10, computer system 11, data acquisition module 12, data preprocessing module 13 and NC Machining Software CAD/C module 14, data acquisition module is embedded in digital control system, and data preprocessing module and NC Machining Software CAD/CAM Module-embedding are in computer systems, which; Rotate steady ring 3,5 to use in pairs, be arranged on the two ends of the shell of column 4 of large diameter thin wall casing respectively, as the benchmark installing and rotate location.
By installing the large diameter thin wall casing handling of rotation steady ring 3,5 on case supports rotary positioning apparatus 7, drive large diameter thin wall body pivot by case supports rotary positioning apparatus 7, spherical crown surface case substrate surface topography data measuring system 10 comprises distance measuring sensor and anchor fitting, distance measuring sensor is arranged on the front end of spindle of three-axis numerical control Fabricating machinery 8 by anchor fitting, distance measuring sensor together with main shaft with the concentric circles at the spherical crown surface Xiang Di center of large diameter thin wall casing for track rotates, as shown in Figure 4, concentric semicircles track is walked by uniform distances, arrow curve represents measurement track, moved by direction, the circumferential center of circle, A point is the initial point of DATA REASONING, B is the semicircle terminal of this garden trajectory, C is the initial point of next concentric semicircles track, D is the terminal of this concentric semicircles track, spherical crown surface metal surface shape characteristic data on the concentric circles that data collecting module collected distance measuring sensor is measured.
As shown in Fig. 5, Fig. 6, Fig. 7, Fig. 8, spherical crown surface metal surface shape characteristic data are carried out pretreatment by the data preprocessing module in computer system, and spherical crown surface metal surface shape characteristic data are reached computer system by digital control system; During this period, by sprayed-on plastic foam at the bottom of spherical crown surface case; Protruding data for new data detailed process be smoothly are rejected: adopt circle rate method to carry out fairing processing according to the noise data in the shape characteristic data of spherical crown surface metal surface, fairing at the beginning of fairing processing is divided into and with nothing left suitable after noise data filtering process; First fairing makes spherical crown surface metal surface tentatively smooth; With nothing left along being make spherical crown surface metal surface smooth further again on the basis of first fairing; And the spherical crown surface metal surface shape characteristic data after fairing processing are stored.In data preprocessing module, pretreatment comprises filtering and data smoothing process, filtering process, namely the noise data in spherical crown surface metal surface shape characteristic data comprises measurement noises data and protrusion surface data, to above-mentioned noise data rejecting abnormalities data after filtering process, and be smoothly new data; Protrusion data in the shape characteristic data of spherical crown surface metal surface are also carried out respective handling according to above-mentioned noise data simultaneously, namely rejecting protruding data also level and smooth is new data, through obtaining the fairing space curve of real metal spherical crown surface after filtering, smoothing processing to take off data, and send data to computer system by interface.
Above-mentionedly be smoothly: adopt circle rate method to carry out fairing processing according to the noise data in the shape characteristic data of spherical crown surface metal surface that fairing processing is divided into just fairing and with nothing left suitable for new data detailed process; First fairing makes spherical crown surface metal surface tentatively smooth; With nothing left along being make spherical crown surface metal surface smooth further again on the basis of first fairing; And the spherical crown surface metal surface shape characteristic data after fairing processing are stored.
Circle rate method is a kind of reconnaissance amendment method, and this method does not need interpolation curve, can judge its fairness by the geometric position of data point, and then finds out bad point and give fairing amendment, does not change better, because do not need to set up system of axes in mathematical processes.According to measuring the measuring point data feature obtained, the pretreatment in the present invention is selected to adopt circle rate method to carry out fairing processing, and process is simple, fast operation, is applicable to high camber curve or closed curve.
As shown in Figure 5, the stack features data in the spherical crown surface metal surface shape characteristic data of display measurement, Fig. 5-a is filtering characteristic data before treatment, and Fig. 5-a is that after being rejected by protrusion surface data after filtering process, warp is level and smooth is new data.
As shown in Figure 6, before the shape characteristic data filtering process of spherical crown surface metal surface, namely remove the three-dimensional data diagram of curves before burr, the abnormal data in diagram is noise data.
As shown in Figure 7, after the shape characteristic data filtering process of spherical crown surface metal surface, namely remove the three-dimensional data diagram of curves after burr, noise abnormal data is disallowable.
As shown in Figure 8, after the shape characteristic data filtering process of spherical crown surface metal surface, i.e. cancelling noise data point, then take fairing processing, obtain the three-dimensional curve after the smoothing of data.
As Fig. 9, Figure 10, Figure 11, Figure 12, reverse shaping by the CAD software in computer system NC Machining Software CAD/CAM module, present spherical crown surface metal surface spatial data curve, then generate and present spherical crown surface metal surface model, computing machine CAD/CAM software is inverse asks model curved surface protrusion to superpose.According to the curved surface of spherical crown surface metal surface model, the enveloping surface that Tool in Cutting point is formed in working angles and the Surface Offset of spherical crown surface metal surface are processed, and form uniform thickness work programme; Computing machine sends uniform thickness processing program code to digital control system again.Before reality processing, the test of analogue simulation data mart modeling is carried out on the computer screen to generation uniform thickness work programme, simulation numerical control machining process of the test, observe cutter whether to collide with the protrusion on spherical crown surface metal surface and spherical crown surface metal surface, if there is collision, amendment cutter cutter lifting height, until collisionless occurs, finally, numerical control program errorless for emulation input digital control system is prepared processing, and the foamed plastic uniform thickness automatically realized at the bottom of to spherical crown surface case by digital control system control three-axis numerical control Fabricating machinery is processed.
As shown in Figure 9, spherical crown surface metal surface shape characteristic data are stored in the specific format after filtering, fairing processing pretreatment, the CAD/CAM software of machine system carries out processing the section line automatically generated on each face as calculated, by each line smoothing transition, and ensure the continuous of each section of curve, obtain space curve.
As shown in Figure 10, the space curve of spherical crown surface metal surface, adopts CAD/CAM software to process, takes setting-out process can present the curve form of spherical crown surface to camberline.
As shown in figure 11, in order to make inverse curved surface of asking more accurate, when data processing, the protrusion surface data of measurement is rejected as noise data, and the data that smoothing processing is new, protrusion superposes by the inverse crown metal surface asked again.Because of size, the shape difference of protrusion, adopt envelope cylinder to substitute protrusion, solid modelling can be carried out according to the cylindrical diameter of envelope, height with position data, protrusion is added on curved surface.
As shown in figure 12, computer system CAD/CAM software, respectively according to spherical crown surface metal surface surface modeling result and tool geometry and size, determine the NC Milling Cutter trajectory path of spherical crown surface metal surface curved surface foamed plastic uniform thickness processing, test simulation uniform thickness adds engineering process, should dodge cutter for each protrusion region, observation prevents cutter and protrusion from colliding, if there is collision, amendment cutter cutter lifting height, until collisionless occurs.
The device implementing to need configuration relevant of the present invention, comprising:
1, three-linkage numerical control machine tool system: the configuration of numerically-controlled machine tool body meets the requirement of thin-wall box body to stroke and precision, and machine tool numerical control system configures high-grade Siemens 840 D CNC System.
2, casing rotary actuation and bracing or strutting arrangement system: realize cabinet workpiece axis and supporting and location, ensures the flexible, reliable of drive wheel and casing swivel eye friction-driven.
3, sensing detection and control system: sensor is non-contact type high-precision laser range sensor, sensor movement controls to be realized by Control System of NC Machine.
4, software system: data acquisition and data processing, numerical control machining, interface operation, CAD/CAM, numerical control machining tool track simulation software.
In a word, the present invention adopts high-precision laser range-finding sensor, measure the spherical crown surface shape characteristic data at the bottom of case, adopt the treatment technologies such as data filtering, strange number strong point is judged effectively and rejects, application cad technique reconstruct spherical crown surface pattern model, ensures that the inverse spherical crown surface model obtained is consistent with actual FREEFORM SURFACE MODEL.To the inverse model use CAM Software Create nc program asked, program can realize Simulation for tooling path through postpositive disposal.Configure the three-shaft linkage numerically-controlled machine tool of high-grade digital control system, main axle cutter is rose cutter, and casing is static, and numerically-controlled machine tool completes the processing of spherical crown surface foamed plastic uniform thickness automatically.
Claims (10)
1. foamed plastic uniform thickness processing unit (plant) at the bottom of the spherical crown surface case of a large diameter thin wall casing, it is characterized in that: comprise and rotate steady ring, case supports rotary positioning apparatus, three-axis numerical control Fabricating machinery, digital control system, spherical crown surface case substrate surface topography data measuring system, computer system, data acquisition module, data preprocessing module and NC Machining Software CAD/CAM module, data acquisition module is embedded in digital control system, and data preprocessing module and NC Machining Software CAD/CAM Module-embedding are in computer systems, which; Rotate steady ring to use in pairs, be arranged on the shell of column two ends of large diameter thin wall casing respectively, as the benchmark installing and rotate location; By installing the large diameter thin wall casing handling of rotation steady ring on case supports rotary positioning apparatus, drive large diameter thin wall body pivot by case supports rotary positioning apparatus; Spherical crown surface case substrate surface topography data measuring system comprises distance measuring sensor and anchor fitting, distance measuring sensor is arranged on the front end of spindle of three-axis numerical control Fabricating machinery by anchor fitting, distance measuring sensor together with main shaft with the concentric circles at the spherical crown surface Xiang Di center of large diameter thin wall casing for track rotates, data collecting module collected distance measuring sensor measure concentric circles on spherical crown surface metal surface shape characteristic data; Spherical crown surface metal surface shape characteristic data are reached computer system by digital control system; During this period, by sprayed-on plastic foam at the bottom of spherical crown surface case; After spherical crown surface metal surface shape characteristic data are carried out pretreatment by the data preprocessing module in computer system, reverse shaping by the CAD software in NC Machining Software CAD/CAM module again, present spherical crown surface metal surface model, then generate uniform thickness work programme by CAM; Computing machine sends uniform thickness processing program code to digital control system again, and the foamed plastic uniform thickness automatically realized at the bottom of to spherical crown surface case by digital control system control three-axis numerical control Fabricating machinery is processed.
2. the foamed plastic uniform thickness processing unit (plant) at the bottom of spherical crown surface case according to claim 1, it is characterized in that: in described data preprocessing module, pretreatment comprises filtering process, namely the noise data in spherical crown surface metal surface shape characteristic data comprises measurement noises data, and after filtering process, rejecting protruding data also level and smooth to above-mentioned noise data is new data; Protrusion data in the shape characteristic data of spherical crown surface metal surface are also carried out respective handling according to above-mentioned noise data, namely rejecting protruding data also level and smooth is new data simultaneously.
3. the foamed plastic uniform thickness processing unit (plant) at the bottom of spherical crown surface case according to claim 2, it is characterized in that: after described noise data filtering process, reject protruding data for new data detailed process be smoothly: adopt circle rate method to carry out fairing processing according to the noise data in the shape characteristic data of spherical crown surface metal surface, fairing at the beginning of fairing processing is divided into and with nothing left suitable; First fairing makes spherical crown surface metal surface tentatively smooth; With nothing left along being make spherical crown surface metal surface smooth further again on the basis of first fairing; And the spherical crown surface metal surface shape characteristic data after fairing processing are stored.
4. the foamed plastic uniform thickness processing unit (plant) at the bottom of spherical crown surface case according to claim 1, is characterized in that: in described NC Machining Software CAD/CAM module, CAD software is reverse shaping, and present spherical crown surface metal surface model, specific implementation process is as follows:
(1) read in pretreated spherical crown surface metal surface shape characteristic data, generate each section line of spherical crown surface metal surface, by each section line smooth transition, and ensure the continuous of each section of section line, obtain one group of space curve;
(2) space curve is generated curved surface, obtain the curve form of spherical crown surface metal surface, carry out protrusion superposition again, because of size, the shape difference of protrusion, envelope cylinder is adopted to substitute protrusion, carry out solid modelling according to the cylindrical diameter of envelope, height with position data, protrusion is added on curved surface, present spherical crown surface metal surface model.
5. the foamed plastic uniform thickness processing unit (plant) at the bottom of spherical crown surface case according to claim 1, it is characterized in that: in described NC Machining Software CAD/CAM module, CAM generates uniform thickness work programme, specific implementation process is as follows: according to the curved surface of spherical crown surface metal surface model, the enveloping surface that Tool in Cutting point is formed in working angles and the Surface Offset of spherical crown surface metal surface are processed, and form uniform thickness work programme.
6. the foamed plastic uniform thickness processing unit (plant) at the bottom of spherical crown surface case according to claim 5, it is characterized in that: tap to prevent Tool in Cutting and encounter spherical crown surface metal surface, before reality processing, the test of analogue simulation data mart modeling is carried out on the computer screen to generation uniform thickness work programme, simulation numerical control machining process of the test, observe cutter whether to collide with the protrusion on spherical crown surface metal surface and spherical crown surface metal surface, if there is collision, amendment cutter cutter lifting height, until collisionless occurs, finally, numerical control program errorless for emulation input digital control system is prepared processing.
7. the foamed plastic uniform thickness processing unit (plant) at the bottom of spherical crown surface case according to claim 1, is characterized in that: the shape characteristic data of spherical crown surface metal surface are transmitted through the network to computer system by described digital control system; Computer system sends uniform thickness processing program code to digital control system by ethernet again.
8. the foamed plastic uniform thickness processing unit (plant) at the bottom of spherical crown surface case according to claim 4, it is characterized in that: when space curve is generated curved surface, because the node of every bar curve is a lot, the speed of surface forming may be very slow, for head it off, on the cross section of getting each spherical crown surface metal surface, the quantity of interpolation point is consistent, and is evenly distributed.
9. the foamed plastic uniform thickness processing unit (plant) at the bottom of spherical crown surface case according to claim 1, is characterized in that: described distance measuring sensor is high precision i.e. 10 mum laser distance measuring sensors.
10. a foamed plastic uniform thickness job operation at the bottom of the spherical crown surface case of large diameter thin wall casing, is characterized in that performing step is as follows:
The first step: casing is installed and location: swivel eye uses in pairs, takes locate mode to be arranged on the two ends of casing respectively; To the casing handling of swivel eye be installed on case supports slewing arrangement, swivel eye is contacted completely with driving support wheel, and is supported by support wheel and locate; By driving the friction-driven of support wheel and swivel eye, the calibration realizing casing rotates and location;
Second step: spherical crown surface case substrate surface topography data measuring system comprises distance measuring sensor and anchor fitting, distance measuring sensor is arranged on the front end of spindle of three-axis numerical control Fabricating machinery by anchor fitting, distance measuring sensor together with main shaft with the concentric circles at the spherical crown surface Xiang Di center of large diameter thin wall casing for track rotates, data collecting module collected distance measuring sensor measure concentric circles on spherical crown surface metal surface shape characteristic data
3rd step: spherical crown surface metal surface shape characteristic data are reached computer system by digital control system; During this period, casing enters foamed plastic spray station, by sprayed-on plastic foam at the bottom of spherical crown surface case; After spherical crown surface metal surface shape characteristic data are carried out pretreatment by the data preprocessing module in computer system.
4th step: pretreated spherical crown surface metal surface shape characteristic data, undertaken reverse shaping by NC Machining Software CAD/CAM module again, present the surface model of spherical crown surface metal surface, generate uniform thickness work programme, simulate NC Machining Process on computers, observe cutter and whether can collide with the protrusion on casing, if there is collision, amendment cutter cutter lifting height, until collisionless occurs;
5th step: computing machine sends uniform thickness processing program code to digital control system again;
6th step: the foamed plastic uniform thickness automatically realized at the bottom of to spherical crown surface case by digital control system control three-axis numerical control Fabricating machinery is processed.
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| CN110524509A (en) * | 2019-07-25 | 2019-12-03 | 航天材料及工艺研究所 | A kind of contact positioning line-plotting device and method based on numerically-controlled machine tool |
| CN111992872A (en) * | 2020-09-14 | 2020-11-27 | 江苏玛吉克工业自动化有限公司 | Three-dimensional five-axis laser processing system based on laser calibration |
| CN112589133A (en) * | 2020-12-03 | 2021-04-02 | 四川航天长征装备制造有限公司 | Uniform thinning processing method and device for large irregular bus-shaped surface shell |
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