CN111195830A - Digital thinning processing method for large thin-wall barrel part - Google Patents
Digital thinning processing method for large thin-wall barrel part Download PDFInfo
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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
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
- B23Q15/007—Automatic control or regulation of feed movement, cutting velocity or position of tool or work while the tool acts upon the workpiece
- B23Q15/013—Control or regulation of feed movement
- B23Q15/02—Control or regulation of feed movement according to the instantaneous size and the required size of the workpiece acted upon
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B23Q17/20—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring workpiece characteristics, e.g. contour, dimension, hardness
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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
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- B23Q17/24—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves
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Abstract
The invention discloses a digital thinning processing method for a large thin-wall cylinder, belongs to the technical field of machining, and relates to a digital thinning processing method for a large thin-wall cylinder. The method comprises the steps of clamping a large thin-wall cylinder piece through a vertical inner support, and measuring the outline and the wall thickness of a thinning section of the cylinder piece through on-machine scanning by utilizing a linear laser measuring device and an ultrasonic measuring device. And then, reestablishing the processing target curved surface of the thinning section by utilizing the actual measurement data of the outline and the wall thickness of the thin-wall cylinder piece and considering the requirement of processing the residual wall thickness, and automatically generating a thinning processing code. And finally, the numerical control machine tool checks to finish the thinning processing of the large thin-wall cylinder. According to the method, the thinning target curved surface associated with the residual wall thickness is reestablished by utilizing the part outline and wall thickness data measured on machine, the thinning code is generated, the function integration of CAD, CAM and CNC in the thinning of the large-scale thin-wall cylinder is effectively realized, and the manual intervention is reduced. The sectional thinning processing and the equal wall thickness or variable wall thickness controllable processing of the large thin-wall cylinder part are realized.
Description
Technical Field
The invention belongs to the technical field of machining, and relates to a digital thinning machining method for a large thin-wall cylinder.
Background
The large thin-wall cylinder is used as a main part for fuel storage and structural bearing and is widely applied to aerospace equipment. In order to ensure light weight and structural strength, the controllable thinning processing of the residual wall thickness of the thin-wall cylinder part is a core problem. However, the thin-walled cylinder is often formed by spinning, clamping deformation is considered, the structure of the thin-walled cylinder has large deformation, and the thin-walled cylinder is processed according to the original design size, so that the consistency of the wall thickness is difficult to ensure.
At present, most of barrel section thinning processing depends on the experience of workers, and the workpieces are subjected to tool setting, rough processing, semi-finish processing and finish processing. And the multi-point thickness measurement is carried out by adopting a handheld thickness gauge mode in each feeding, the numerical control machining code is manually modified, the thickness difference of each point is compensated, the automation degree is low, and the machining precision is difficult to guarantee. The efficient and precise thinning processing of large-size and weak-rigidity large-size cylindrical parts puts higher requirements on the material removal capability and the precision guarantee mechanism of the processing method and equipment. Therefore, it is urgently needed to develop a digital thinning processing method for large cylindrical thin-wall parts, and the requirements of high-precision and high-performance manufacturing of the large cylindrical parts are met.
The measuring sensors of geometric parameters such as profile, thickness and the like are integrated on a numerical control processing machine tool, so that the measuring-processing integration of the large thin-wall cylinder is realized, the controllable processing of the residual wall thickness is ensured, and a feasible scheme is provided for the digital thinning processing of the large thin-wall cylinder. However, the existing measurement-processing integration technology still needs to carry out deep research on the aspects of efficient and precise on-machine measurement of specific parameters, rapid fusion processing of point cloud data, processing system development with specific functions and the like for specific processed parts.
University of major union's patent 201810229225.9 discloses a vertical processing method for liquid rocket engine spray pipe cooling channel, the spray pipe adopts vertical clamping, utilizes point laser sensor to carry out the profile measurement and the actual measurement profile curved surface of fitting, according to processing requirement groove width and groove depth automatic generation processing code, adopts two milling heads symmetry to mill spray pipe cooling channel, has accomplished the integration of measurement processing, can realize the equal groove depth processing of thin wall part. Tianjin aerospace Changcheng rocket manufacturing Limited company discloses a large thin-walled skin self-adaptive equal-wall-thickness milling system and a processing method thereof in patent 201410416853.3, and laser and ultrasonic measuring devices are used on a five-axis numerical control machine tool to measure the surface profile and the thickness of the skin, so that the equal-wall-thickness processing of skin thin-walled parts can be realized.
The research does not mention a digital thinning processing method for large thin-wall cylinder parts.
Disclosure of Invention
The invention mainly solves the technical problem of overcoming the defects of the existing processing method, and aims at the requirement of high-efficiency precision processing on controllable residual wall thickness of large cylindrical parts. The processing machine tool is of a single-upright-column and single-ram structure, and the workpiece is vertically clamped, so that the process reliability of the digital thinning processing of the large thin-wall cylinder part is ensured. The numerical control machine drives the laser scanner to complete on-machine scanning measurement of the profile and the wall thickness of the part, and the measurement efficiency is high and the precision is stable. On an open numerical control platform, the thinning processing target curved surface associated with the residual wall thickness is reestablished by utilizing the part outline and the wall thickness data measured on the machine to generate thinning processing G codes, so that the function integration of CAD, CAM and CNC in the thinning processing of the large thin-wall cylinder part is effectively realized, and the manual intervention is reduced. The sectional thinning processing or the integral thinning processing of the large-sized thin-wall cylinder part can be realized, and the controllable processing of equal wall thickness or variable wall thickness can be realized.
The technical scheme adopted by the invention is a digital thinning processing method of a large thin-wall cylinder, the method comprises the steps of clamping the large thin-wall cylinder by a vertical inner support, and scanning and measuring the outline and the wall thickness of a thinning section of the cylinder on machine by utilizing a linear laser measuring and ultrasonic measuring device; then, reestablishing a processing target curved surface of the thinning section by utilizing the actual measurement data of the outline and the wall thickness of the thin-wall cylinder piece and considering the requirement of processing residual wall thickness, and automatically generating a thinning processing G code; and finally, finishing the thinning processing of the large thin-wall barrel by the numerical control machine tool.
The method comprises the following specific steps:
first-step thin-wall cylinder vertical internal-support clamping
The linear laser scanning measuring device 5 and the ultrasonic measuring device 3 are preset in the bracket 4 to prevent collision in the clamping process; sleeving the thin-wall cylinder part 6 on a special inner support clamp to complete vertical clamping in place; the top of the barrel part is tightly pressed by using a pressing plate 14 and a locking nut 2, and the bottom of the barrel part is supported in an auxiliary way by using a rotary worktable 16 to clamp an arc-shaped auxiliary guard plate 15, so that the integral rigidity is improved, and the vertical inner support clamping of the thin-wall barrel part 6 is completed;
second step line laser scanning measurement trajectory planning
Line laser scanning measurement path M for planning outline of thin-wall barrel part1：
Wherein the content of the first and second substances,
for the ith line of laser measurement line, r1The total number of lines is measured for the line laser.
Every two lines have uniform laser measuring line interval, and the laser measuring line interval is set as d1The x-axis range of the line laser scanning measuring device is l1. Is required to be full ofFoot d1＜l1And if the line laser is measured for the total number r of lines1When decreasing by 1, there is d1＞l1To ensure the best measurement condition;
the line laser measuring device 5 is arranged on a main shaft 18 of the machine tool, the line laser scanning measuring device 5 is controlled by the machine tool, and the line laser measuring central line C is moved to the 1 st line laser measuring line
And (4) starting point. According to the sampling step length of the scanning direction, the line laser scanning measuring device 5 measures the line along the 1 st line laser
Measuring to obtain region profile data D1：
Wherein the content of the first and second substances,
for the jth data point, n, of the 1 st line laser measurement line1Counting all measurement points of the outline of the laser measurement line region of the 1 st line;
measuring line spacing d from laser1The rotary table 16 rotates the division angle to move the line laser measurement center line C to the 2 nd line laser measurement line
Starting point, performing 2 nd line laser measurement line
Measuring the area profile to obtain the 2 nd line laser measuring line
Region outline data D2. According to the planned scanning measuring path M1Scanning and measuring in sequence to obtain the outline data D of the thin-wall cylinder;
thirdly, ultrasonically measuring the wall thickness of the cylinder section of the thin-wall cylinder part
Planning ultrasonic measurement path M for wall thickness of thin-wall barrel part2：
Wherein the content of the first and second substances,
for the ith ultrasonic measuring line, r2The total number of the ultrasonic measurement lines.
Let the ultrasonic measuring line interval be d2The density of ultrasonic measurement points is rho1And satisfy the conditions
The ultrasonic measuring device 3 is arranged on a main shaft 18 of a machine tool, and the machine tool controls the ultrasonic measuring device 3 to move to the 1 st ultrasonic measuring line
And (4) starting point. The coupling agent circulating system provides clean and stable-pressure coupling agent. According to the density rho of the ultrasonic measuring points1Setting the sampling step length in the scanning direction
The ultrasonic measuring device 3 is arranged along the 1 st ultrasonic measuring line
Measuring to obtain corresponding thickness data T1：
Wherein the content of the first and second substances,
for the kth measuring point, m, of the 1 st line ultrasonic measuring line1Counting all the measurement points on the ultrasonic measurement line of the 1 st line;
according to ultrasonic measurement of line spacing d2The rotary table 16 is rotated to move the ultrasonic measuring device 3 to the 2 nd ultrasonic measuring line
Starting point to obtain the 2 nd ultrasonic measurement line
Thickness data T2. According to the planned scanning measuring path M2Scanning and measuring in sequence to obtain thin-wall cylinder thickness data T;
fourth step modeling of processing target curved surface
Based on the thin-wall cylinder part outline data D, a curved surface model is constructed by using a Shepard local interpolation function to obtain a thin-wall cylinder part outline curved surface S3(ii) a Based on the thickness data T of the thin-wall cylinder, a rectangular topological method is utilized to form a curved surface S on the outline of the thin-wall cylinder3The wall thickness is constructed in the normal direction to obtain an inner profile curved surface S of the thin-wall cylinder part1. According to the residual wall thickness of the thin-wall cylinder part, forming a curved surface S on the inner contour of the thin-wall cylinder part1The normal direction of the target surface S is set up to obtain a bias curved surface S2；
Fifthly, planning the tool positions to obtain machining codes
Based on processing target curved surface S2According to the total number r of the predetermined thinning processing track lines3Cutting out the outer contour line at an even turntable angle to obtain a thinning processing track M3：
Thinning processing track line for ith strip
According to the machining step length L2Uniformly planning to obtain the cutter point P of the ith thinning processing tracki：
Pi＝Pi j,j∈[1,L1/L2]}， (6)
Wherein, Pi jFor the jth tool location, L, of the ith thinning track1To reduce the length of the section; further, the ith trace processing code C is generated from the tool position point informationi(ii) a Sequentially processing according to the processing track and the preset step length to obtain a thinning processing code C of the thin-wall cylinder;
sixth step of thin-wall tube thinning processing
The milling cutter 17 is controlled by the machine tool to move to the 1 st thinning processing track line
Starting point, executing the 1 st track processing code C1(ii) a And indexing the rotary worktable 16 according to the set machining track, and sequentially executing the thinning machining codes C of all the thin-wall cylinder parts to finish the thinning machining of the thin-wall cylinder parts.
The invention has the advantages that the machine tool adopts a single-upright post and single-ram structure, the system is simple, the movement and positioning precision is high, and the control is reliable. The workpiece is vertically clamped, so that the process reliability of the digital thinning processing of the large-sized thin-wall cylinder part is ensured. And the thinning processing target curved surface associated with the residual wall thickness is reestablished by utilizing the part outline and wall thickness data measured on the machine to generate the thinning processing G code, so that the function integration of CAD, CAM and CNC in the thinning processing of the large-sized thin-wall cylinder part is effectively realized, and the manual intervention is reduced. Aiming at the characteristics of large size, low rigidity and the like of the large thin-wall cylinder part, the sectional thinning processing or the integral thinning processing of the large thin-wall cylinder part can be effectively realized, and the controllable processing of equal wall thickness or variable wall thickness can be realized. The invention realizes the integration of measurement and processing, and completes the work of measuring the outline, measuring the wall thickness and milling and thinning under the condition of one-time clamping of parts. And fusion processing is carried out on the measured data, the thinning processing curved surface is regenerated, the thinning processing track is replanned and a processing code is generated, and the processing precision and the processing efficiency can be balanced according to different measuring and processing step lengths. The method can meet the requirement of equal-wall-thickness or variable-wall-thickness controllable processing of thin-wall cylinder sections with different sizes, has high processing efficiency and good processing consistency, and well realizes high-efficiency and high-precision thinning processing of large thin-wall cylinder parts.
Drawings
Fig. 1-a general view schematic diagram of a thinning processing method of a large-scale thin-wall cylinder, fig. 2-a flow chart of a digital thinning processing method of a large-scale thin-wall cylinder, fig. 3-a line laser measurement trajectory planning schematic diagram, fig. 4-an ultrasonic measurement trajectory planning schematic diagram, and fig. 5-a thinning processing trajectory planning schematic diagram, wherein: 1-lathe bed, 2-lock nut, 3-ultrasonic measuring device, 4-bracket, 5-line laser scanning measuring device, 6-thin-wall barrel part, 7-Z-axis alternating current servo motor, 8-ram, 9-Z-axis guide rail, 10-upright post, 11-Y-axis guide rail, 12-Y-axis ball screw, 13-Y-axis alternating current servo motor, 14-pressing plate, 15-arc auxiliary guard plate, 16-rotary worktable, 17-milling cutter, 18-machine tool spindle, X-machine tool X axis, Y-machine tool Y axis, B-machine tool B axis, C-line laser measuring center line, mu m1-a line laser measuring the trajectory,
1 st line laser measurement line, D1-1 st line laser measurement line area profile data, m2-ultrasound measurement trace, m3-thinning the machining trajectory,
fig. 6a) a schematic structural view of the thin-walled cylinder 6, and fig. 6b) a sectional view of fig. 6a) a-a.
Wherein, A-A-a cross section of the strip, d-a-b-c of the work piece, S1Inner contour of the thin-walled tubular part 6, S2-curved surface to be machined, S3-inner contour surface of the part.
FIG. 7a) is a schematic diagram of a curved surface to be processed, FIG. 7b) is a schematic diagram of generation of a thinning processing tool location point,
wherein S is2-a curved surface to be machined,
-ith thinning track, L2-Y-direction machining step, Pi 1-1 st tool location point, P, of ith ironing tracki 2-2 nd tool location point, P, of ith ironing tracki 3For the 3 rd tool location point, P, of the ith thinning processing tracki j-jth tool location point of ith ironing track。
Detailed Description
The following describes embodiments of the present invention in detail with reference to the accompanying drawings and technical solutions.
The diameter of the thin-wall cylinder part 6 to be processed is 750-1000 mm, the thinning bandwidth is 300-400 mm, the wall thickness of a blank is 8-12 mm, and the residual wall thickness is 3-6 mm; the X-axis range of the line laser scanning measuring device is 120 mm; the diameter of the milling cutter is 12 mm.
The processing method has a flow chart as shown in fig. 2, and comprises the following specific steps:
vertical internal supporting clamp for thin-wall barrel part
The linear laser scanning measuring device 5 and the ultrasonic measuring device 3 are arranged in the bracket 4 in advance, so that collision in the clamping process is prevented. And sleeving the thin-wall barrel part 6 on the special inner support clamp, completing vertical clamping in place, controlling the special inner support clamp, and automatically completing inner support clamping. The top of the barrel part is pressed by the pressing plate 14 and the locking nut 2, and the bottom of the barrel part is supported in an auxiliary way by the arc-shaped auxiliary protection plate 15 clamped by the rotary worktable 16, so that the overall rigidity is improved, and the vertical internal support clamping of the thin-wall barrel part 6 is completed, as shown in figure 1.
Second, line laser scanning measurement track planning
Line laser measuring line total number r 115, the sampling step length is 24 degrees, and a line laser scanning measuring path of the outline of the thin-wall cylinder part is obtained
The line laser measuring device 5 is mounted on the machine tool spindle 18. The machine tool controls the line laser scanning measuring device 5 to move the line laser measuring central line C to the 1 st line laser measuring line
Starting point, see fig. 3. And adjusting the pose of the line laser measuring device to ensure that the measuring laser line is vertical to the part bus. Setting the sampling step length in the scanning direction to be 2mm, and the line laser scanning measuring device 5 measures the line along the 1 st line laser
Measured to obtainTo its region profile data
The turntable 16 rotates to measure the path M according to the planned scan1And scanning and measuring in sequence to obtain the profile data D of the thin-wall cylinder.
Ultrasonic measurement of wall thickness of barrel section of three-thin-wall barrel part
Taking the density rho of ultrasonic measuring points11/16, sampling step length of Y direction is 4mm, and ultrasonic measuring line interval d 24 mm. Planning to obtain ultrasonic measurement path of wall thickness of thin-wall cylinder part
The turntable 16 is adjusted back to the initial state. The ultrasonic measuring device 3 is mounted on the machine tool spindle 18. The machine tool controls the ultrasonic measuring device 3 to move to the 1 st ultrasonic measuring line
Starting point, see fig. 4. The ultrasonic measuring device 3 is arranged along the 1 st ultrasonic measuring line
Measuring to obtain corresponding thickness data
According to ultrasonic measurement of line spacing d2The turntable 16 rotates to measure the path M according to the planned scan2And scanning and measuring in sequence to obtain the thickness data T of the thin-wall cylinder.
Fourthly, modeling of the curved surface of the processing target
Based on the thin-wall cylinder part outline data D, a curved surface model is constructed by using a Shepard local interpolation function to obtain a thin-wall cylinder part outline curved surface S3. Based on the thickness data T of the thin-wall cylinder, a rectangular topological method is utilized to form a curved surface S on the outline of the thin-wall cylinder3The wall thickness is constructed in the normal direction to obtain an inner profile curved surface S of the thin-wall cylinder part1. According to the requirement of residual wall thickness, forming a curved surface S on the inner contour of the thin-wall cylinder1The normal direction of the target surface S is set up to obtain a bias curved surface S2See fig. 6.
Fifthly, planning the tool positions to obtain processing codes
Taking the total number r of thinning processing track lines3360, on the constructed curved surface S to be processed2In the middle, the outer contour line is cut at an angle of 1 degree to obtain a thinning processing track
Thinning processing track line for ith strip
Setting the processing step length to be 4mm, and starting from the top and every other processing step length L2Intercepting a cutter point to obtain the cutter point information P of the ith thinning processing tracki＝Pi j,j∈[1,60]}. Further, the ith trace processing code C is generated from the tool position point informationi. And sequentially processing according to the processing track and the preset step length to obtain a thinning processing code C of the thin-wall cylinder, which is shown in figure 7.
Six, thin wall barrel thinning processing
The rotary table 16 is adjusted back to the initial state, setting the rotation step to 1 °. The milling cutter 17 is controlled by the machine tool to move to the 1 st thinning processing track line
Starting point, executing the 1 st track processing code C1. According to the set processing track, the rotary table 16 indexes, and sequentially executes the thinning processing codes C of all the thin-wall cylinder pieces, so as to finish the thinning processing of the thin-wall cylinder pieces, as shown in fig. 5.
And seventhly, moving the milling cutter 17 to a safety position after the machining is finished. And loosening the locking nut 2, rotating the rotary worktable to loosen the arc-shaped auxiliary guard plate 15, taking down the pressing plate 14, and unloading the workpiece 6 to finish the thinning processing of the whole large-sized cylindrical part.
The invention realizes the integration of measurement and processing, and completes the work of measuring the outline, measuring the wall thickness and milling and thinning under the condition of one-time clamping of parts. The method can meet the requirement of equal-wall-thickness or variable-wall-thickness controllable processing of the thin-wall cylinder sections with different sizes, has high processing efficiency and good processing consistency, and well realizes efficient and high-precision thinning processing of large thin-wall cylinder parts.
Claims (1)
1. A digital thinning processing method of large-scale thin-walled cylinder, said method comprises supporting the clamping in the vertical inside of large-scale thin-walled cylinder first, utilize line laser to measure and supersound measuring device, scan and measure outline and wall thickness of the thinning section of cylinder on the machine; then, reestablishing a processing target curved surface of the thinning section by utilizing the actual measurement data of the outline and the wall thickness of the thin-wall cylinder piece and considering the requirement of processing residual wall thickness, and automatically generating a thinning processing G code; finally, the numerical control machine tool finishes the thinning processing of the large thin-wall cylinder; the method comprises the following specific steps:
first-step thin-wall cylinder vertical internal-support clamping
The linear laser scanning measuring device (5) and the ultrasonic measuring device (3) are preset in the bracket (4) to prevent collision in the clamping process; sleeving the thin-wall cylinder part (6) on the special inner support clamp to complete vertical clamping in place; the top of the barrel part is pressed by a pressing plate (14) and a locking nut (2), and the bottom of the barrel part is supported in an auxiliary way by an arc-shaped auxiliary protection plate (15) clamped by a rotary worktable (16), so that the integral rigidity is improved, and the vertical inner support clamping of the thin-wall barrel part (6) is completed;
second step line laser scanning measurement trajectory planning
Line laser scanning measurement path M for planning outline of thin-wall barrel part1：
Wherein the content of the first and second substances,
for the ith line of laser measurement line, r1Measuring the total number of lines for line laser;
every two lines have uniform laser measuring line interval, and the laser measuring line interval is set as d1The x-axis range of the line laser scanning measuring device is l1(ii) a Is required to satisfy d1＜l1And if the line laser is measured for the total number r of lines1ReduceAt 1 time, there is d1＞l1To ensure the best measurement condition;
the linear laser measuring device (5) is arranged on a main shaft (18) of a machine tool, the linear laser measuring central line C is moved to the 1 st linear laser measuring line by controlling the linear laser scanning measuring device (5) by the machine tool
A starting point; according to the sampling step length of the scanning direction, the line laser scanning measuring device (5) measures the line along the 1 st line laser
Measuring to obtain region profile data D1：：
Wherein the content of the first and second substances,
for the jth data point, n, of the 1 st line laser measurement line1Counting all measurement points of the outline of the laser measurement line region of the 1 st line;
measuring line spacing d from laser1The rotary worktable (16) rotates the division angle to move the line laser measuring center line C to the 2 nd line laser measuring line
Starting point, performing 2 nd line laser measurement line
Measuring the area profile to obtain the 2 nd line laser measuring line
Region outline data D2(ii) a According to the planned scanning measuring path M1Scanning and measuring in sequence to obtain the outline data D of the thin-wall cylinder;
thirdly, ultrasonically measuring the wall thickness of the cylinder section of the thin-wall cylinder part
Planning ultrasonic measurement path M for wall thickness of thin-wall barrel part2：
Wherein the content of the first and second substances,
for the ith ultrasonic measuring line, r2The total number of the ultrasonic measuring lines is;
let the ultrasonic measuring line interval be d2The density of ultrasonic measurement points is rho1And satisfy the conditions
The ultrasonic measuring device (3) is arranged on a main shaft (18) of a machine tool, and the machine tool controls the ultrasonic measuring device (3) to move to the 1 st ultrasonic measuring line
A starting point; the coupling agent circulating system provides clean and stable-pressure coupling agent; according to the density rho of the ultrasonic measuring points1Setting the sampling step length in the scanning direction
The ultrasonic measuring device (3) is arranged along the 1 st ultrasonic measuring line
Measuring to obtain corresponding thickness data T1：
Wherein the content of the first and second substances,
for the kth measuring point, m, of the 1 st line ultrasonic measuring line1Counting all the measurement points on the ultrasonic measurement line of the 1 st line;
according to ultrasonic measurement of line spacing d2The rotary table (16) rotates to move the ultrasonic measuring device (3) to the 2 nd ultrasonic measuring line
Starting point to obtain the 2 nd ultrasonic measurement line
Thickness data T2(ii) a According to the planned scanning measuring path M2Scanning and measuring in sequence to obtain thin-wall cylinder thickness data T;
fourth step modeling of processing target curved surface
Based on the thin-wall cylinder part outline data D, a curved surface model is constructed by using a Shepard local interpolation function to obtain a thin-wall cylinder part outline curved surface S3(ii) a Based on the thickness data T of the thin-wall cylinder, a rectangular topological method is utilized to form a curved surface S on the outline of the thin-wall cylinder3The wall thickness is constructed in the normal direction to obtain an inner profile curved surface S of the thin-wall cylinder part1(ii) a According to the residual wall thickness of the thin-wall cylinder part, forming a curved surface S on the inner contour of the thin-wall cylinder part1The normal direction of the target surface S is set up to obtain a bias curved surface S2；
Fifthly, planning the tool positions to obtain machining codes
Based on processing target curved surface S2According to the total number r of the predetermined thinning processing track lines3Cutting out the outer contour line at an even turntable angle to obtain a thinning processing track M3：
Thinning processing track line for ith strip
According to the machining step length L2Uniformly planning to obtain the firsti cutter point P of thinning processing tracki：
Wherein the content of the first and second substances,
for the jth tool location, L, of the ith thinning track1To reduce the length of the section; further, the ith trace processing code C is generated from the tool position point informationi(ii) a Sequentially processing according to the processing track and the preset step length to obtain a thinning processing code C of the thin-wall cylinder;
sixth step of thin-wall tube thinning processing
The milling cutter (17) is controlled by the machine tool to move to the 1 st thinning processing track line
Starting point, executing the 1 st track processing code C1(ii) a And indexing the rotary worktable (16) according to the set machining track, and sequentially executing thinning machining codes C of all thin-wall cylinder parts to finish the thinning machining of the thin-wall cylinder parts.
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| CN112720060A (en) * | 2020-12-18 | 2021-04-30 | 湖北三江航天红阳机电有限公司 | Double-profile curved surface narrow and long duct part machining reference determination method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001030141A (en) * | 1999-07-23 | 2001-02-06 | Toshiba Corp | Thin pipe machining method and its device |
| CN101780557A (en) * | 2010-02-09 | 2010-07-21 | 保定惠阳航空螺旋桨制造厂 | Numerical control milling process method of thin-walled part die cavity |
| CN103706809A (en) * | 2013-12-14 | 2014-04-09 | 山西江淮重工有限责任公司 | Machining fixture for large thin-wall conical barrel and machining process thereof |
| CN104139323A (en) * | 2013-09-24 | 2014-11-12 | 上海拓璞数控科技有限公司 | On-line thickness measurement system for large aeronautical thin-walled part and thickness measurement method of system |
| CN104289748A (en) * | 2014-08-22 | 2015-01-21 | 天津航天长征火箭制造有限公司 | Large-scale thin-wall skin self-adapting equal wall-thickness milling system and processing method thereof |
| CN108890225A (en) * | 2018-06-29 | 2018-11-27 | 航天材料及工艺研究所 | A kind of low deformation processing method of thin-walled large area abnormal shape composite material casing |
| CN109128885A (en) * | 2018-09-29 | 2019-01-04 | 山西江淮重工有限责任公司 | Thin-wall tube-shaped excircle of workpiece turning clamping tooling and clamping method |
| CN109840337A (en) * | 2017-11-27 | 2019-06-04 | 上海交通大学 | The evenness of wall thickness of thin-walled workpiece controls milling method |
-
2020
- 2020-02-03 CN CN202010078987.4A patent/CN111195830B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001030141A (en) * | 1999-07-23 | 2001-02-06 | Toshiba Corp | Thin pipe machining method and its device |
| CN101780557A (en) * | 2010-02-09 | 2010-07-21 | 保定惠阳航空螺旋桨制造厂 | Numerical control milling process method of thin-walled part die cavity |
| CN104139323A (en) * | 2013-09-24 | 2014-11-12 | 上海拓璞数控科技有限公司 | On-line thickness measurement system for large aeronautical thin-walled part and thickness measurement method of system |
| CN103706809A (en) * | 2013-12-14 | 2014-04-09 | 山西江淮重工有限责任公司 | Machining fixture for large thin-wall conical barrel and machining process thereof |
| CN104289748A (en) * | 2014-08-22 | 2015-01-21 | 天津航天长征火箭制造有限公司 | Large-scale thin-wall skin self-adapting equal wall-thickness milling system and processing method thereof |
| CN109840337A (en) * | 2017-11-27 | 2019-06-04 | 上海交通大学 | The evenness of wall thickness of thin-walled workpiece controls milling method |
| CN108890225A (en) * | 2018-06-29 | 2018-11-27 | 航天材料及工艺研究所 | A kind of low deformation processing method of thin-walled large area abnormal shape composite material casing |
| CN109128885A (en) * | 2018-09-29 | 2019-01-04 | 山西江淮重工有限责任公司 | Thin-wall tube-shaped excircle of workpiece turning clamping tooling and clamping method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112720060A (en) * | 2020-12-18 | 2021-04-30 | 湖北三江航天红阳机电有限公司 | Double-profile curved surface narrow and long duct part machining reference determination method |
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| CN113110290A (en) * | 2021-04-06 | 2021-07-13 | 大连理工大学 | Large-scale thin-wall part mirror image machining method based on force feedback control |
| CN113110290B (en) * | 2021-04-06 | 2022-06-14 | 大连理工大学 | Large-scale thin-wall part mirror image machining method based on force feedback control |
| CN113218330B (en) * | 2021-04-27 | 2022-04-08 | 大连理工大学 | PCL (polycaprolactone) -library-based large-scale thin-wall component measuring and data processing method |
| CN113218330A (en) * | 2021-04-27 | 2021-08-06 | 大连理工大学 | PCL (polycaprolactone) -library-based large-scale thin-wall component measuring and data processing method |
| CN113399721A (en) * | 2021-07-01 | 2021-09-17 | 中国航发贵州黎阳航空动力有限公司 | Method for milling squirrel cage window |
| CN113399721B (en) * | 2021-07-01 | 2022-06-03 | 中国航发贵州黎阳航空动力有限公司 | Method for milling squirrel cage window |
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| CN114001683A (en) * | 2021-10-26 | 2022-02-01 | 大连理工大学 | Complex component machining residual wall thickness self-adaptive compensation method based on coordinate origin translation |
| CN114185307A (en) * | 2021-11-23 | 2022-03-15 | 大连理工大学 | Large thin-wall part machining deformation partition compensation method |
| CN114178594A (en) * | 2021-12-10 | 2022-03-15 | 上海交通大学 | System and method for milling inner cavity of deviation-containing cylindrical thin-wall casting |
| CN114200891A (en) * | 2021-12-10 | 2022-03-18 | 上海交通大学 | Model-free cylindrical casting inner cavity milling system and track planning method |
| CN114200891B (en) * | 2021-12-10 | 2023-09-22 | 上海交通大学 | Model-free cylindrical casting inner cavity milling system and track planning method |
| CN115338673B (en) * | 2022-07-27 | 2023-11-21 | 湘潭大学 | Wheel tread processing method and turning machine |
| CN115338673A (en) * | 2022-07-27 | 2022-11-15 | 湘潭大学 | Wheel tread processing method and turning machine |
| CN115328020A (en) * | 2022-08-29 | 2022-11-11 | 山东大学 | System and method for correcting trimming track of thin-wall workpiece of aircraft |
| CN115328020B (en) * | 2022-08-29 | 2024-04-26 | 山东大学 | Trimming track correction system and method for aircraft thin-wall workpiece |
| CN116237855A (en) * | 2023-03-13 | 2023-06-09 | 哈尔滨工业大学 | Processing method of anodic oxide layer at edge of rocket storage tank annular part |
| CN116237855B (en) * | 2023-03-13 | 2023-10-27 | 哈尔滨工业大学 | Processing method of anodic oxide layer at edge of rocket storage tank annular part |
| CN116330045B (en) * | 2023-05-29 | 2023-09-26 | 南京航空航天大学 | Method and device for measuring profile and wall thickness of thin-wall rotary part on-machine by laser |
| CN116330045A (en) * | 2023-05-29 | 2023-06-27 | 南京航空航天大学 | Method and device for measuring profile and wall thickness of thin-wall rotary part on-machine by laser |
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