CN101667028A - Processing method of curved saddle groove of suspension bridge saddle - Google Patents
Processing method of curved saddle groove of suspension bridge saddle Download PDFInfo
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- CN101667028A CN101667028A CN200910167616A CN200910167616A CN101667028A CN 101667028 A CN101667028 A CN 101667028A CN 200910167616 A CN200910167616 A CN 200910167616A CN 200910167616 A CN200910167616 A CN 200910167616A CN 101667028 A CN101667028 A CN 101667028A
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Abstract
The invention discloses a processing method of curved saddle groove of suspension bridge saddle, which is processed by a four-axis linkage numerical control boring-milling machine. The compiling stepsof the numerical control processing procedure are as follows: 1) the vertical face of the workpiece is an XZ plane; the flat surface of the workpiece is an XY plane; the coordinate of the center of rotation of a work bench is (0,0); the rotation angle of the work bench is alpha at a time; the circular arc radius of the workpiece is R1; and the included angle of the plane is beta; 2) the X, Z coordinates are determined: supposing that the circular arc central coordinate of the workpiece vertical face is (P1, P2), then the rotation radius R of the circular arc center surrounding the center of the machine tool workbench satisfies the following formula: R=(P1<2>+P2<2>)<1/2>; the rotation initial angle alpha 0 satisfies the following formula: alpha 0=artSIN (P1/P2); after the workbench rotatesan angle of alpha, the coordinate of the center of the workpiece circular arc is [R*SIN(alpha 0+alpha), R*COS(alpha 0+alpha)]; and the cutter processing coordinate is [R*SIN(alpha 0+alpha), (R1-R*COSalpha)]; and 3) the Y coordinate is determined: after the workbench rotates an angle of alpha, the displacement distance of the workpiece circular center on the X axis is R*SIN alpha, and the relative displacement distance on the Y axis is R*SIN(alpha 0+alpha)*TAN beta.
Description
Technical field
The present invention relates to the process technology of suspension bridge saddle, specifically, relate to the job operation of cable saddle curved saddle groove.
Background technology
In modern bridge construction, suspension bridge because span ability is big, anti-seismic performance good, aesthetic in appearance, become the first-selected bridge type of Longspan Bridge.
The saddle groove of suspension bridge saddle has two kinds of shapes: a kind of is linear pattern, and promptly saddle groove vertical projecting line is a straight line; Another kind is a shaped form, and saddle saddle groove vertical projecting line is a curve.The linear pattern cable saddle is processed easily, and shaped form cable saddle difficulty of processing is very big, must use the interlocked numerical controlled boring and milling machine of 4-coordinate, and promptly X, Y, Z axle add turning axle, generate nc program automatically with the computing machine three-dimensional software, can Processing Curve type saddle groove.But Computerized three-dimensional software is the software of external exploitation, and import price is extremely expensive, causes the cable saddle processing cost higher, bridge cost height.
In addition, the nc program of using the computing machine three-dimensional software to generate automatically, when processing was interrupted for some reason, tool setting was very difficult again.
Summary of the invention
Purpose of the present invention provides a kind of job operation of suspension bridge saddle saddle groove.This method need not generate nc program with the computing machine three-dimensional software, but artificial programming, to cut down finished cost.
Technical solution of the present invention is:
A kind of job operation of curved saddle groove of suspension bridge saddle, dispose an interlocked numerical controlled boring and milling machine of 4-coordinate, cable saddle is placed on the worktable of this boring and milling machine, and make the cable saddle baseplane vertical with work top, cutter cuts machined surface from normal direction, nc program control working angles by this boring and milling machine control system prestores processes curved saddle groove; Earlier in cutting, according to the relative position of cable saddle and worktable, write nc program, with this programmed control working angles; Described nc program to write step as follows:
1) setup parameter
The workpiece facade is the XZ plane; Workpiece planarization is the XY plane; Worktable rotation center coordinate is (0,0); Worktable rotates number of degrees a at every turn; Workpiece's Arc Radius R1; Plane included angle β;
2) X, Z coordinate determine: that utilizes numerical control device seeks the limit device, and (P1, P2), this center of arc is around the radius of turn R=(P1 at platen center to measure workpiece center of arc coordinate
2+ P2
2)
1/2, initial angle a0=artSIN (P1/P2); After the worktable rotation a angle, the coordinate of workpiece center of arc is [R*SIN (a0+a), R*COS (a0+a)], and then processing place X, Z coordinate are [R*SIN (a0+a), (R1-R*COSa)];
3) the Y coordinate is determined: after the worktable rotation a angle, workpiece center of arc is R*SIN (a0+a) in X axis displacement, and corresponding y-axis shift moves distance, and promptly the Y coordinate is R*SIN (a0+a) * TAN β;
After the establishment of described nc program, with computing machine debug, emulation, errorless back reaches lathe by the numerical control transmitting software, utilizes simulation software that lathe carries analogue simulation once more.
Described workpiece is sought the limit device with lathe and is found out workpiece facade center of arc position behind the worktable installation in position, and the parameter value of its coordinate of substitution P1, P2 after trial cut is errorless, carries out cut again.
Technique effect of the present invention:
Above-mentioned saddle groove three-dimensional space curve normal direction process technology, broken the restriction of traditional space three-dimensional Curve Machining dependence Computerized three-dimensional software programming, by artificial programming, successfully realized the digital control processing of cable saddle curved saddle groove, solved the serial challenge in the large-scale heavy workpiece space three-dimensional Curve Machining effectively, making simplified processing, universalization, is suitable, an economic new technology.
Use written program of the present invention, when processing was interrupted for some reason, tool setting was easy again, only need re-enter the initial value of parameter, got final product automatic tool preset.
Description of drawings
Fig. 1 is the structural representation of this curved saddle groove cable saddle, wherein:
Fig. 1-a is the front view of curved saddle groove cable saddle;
Fig. 1-b is the vertical view of Fig. 1-a.
Fig. 2 is the principle schematic (perfect condition that workpiece facade center of arc overlaps with the platen rotation center) of this method, wherein:
Fig. 2-a is cable saddle side, a rotation back coordinate synoptic diagram;
Fig. 2-b is a rotation back cable saddle saddle groove face coordinate synoptic diagram.
Fig. 3 is the principle of coordinate transformation synoptic diagram (virtual condition that workpiece facade center of arc and platen rotation center do not overlap) of this method, wherein:
Fig. 3-a is a cable saddle side coordinate synoptic diagram before the rotation;
Fig. 3-b is a cable saddle saddle groove face coordinate synoptic diagram before the rotation;
Fig. 3-c is cable saddle side, a rotation back coordinate synoptic diagram;
Fig. 3-d is a rotation back cable saddle saddle groove face coordinate synoptic diagram.
Embodiment
Before explanation this method, be necessary to introduce earlier the structure of cable saddle, so that understand the present invention better.
(Fig. 1-a, Fig. 1-b): the cable saddle of curved saddle groove has three important parameters, i.e. cable saddle facade arc radius R referring to Fig. 1
1, the radius of curvature R of saddle groove
2, the plane included angle β of saddle groove curve.Cable saddle saddle groove is a machined surface, adds man-hour, and this face is vertical with the platen face.Be not difficult to find out that saddle grooved line is typical three-dimensional space curve, must use the interlocked numerical controlled boring and milling machine of 4-coordinate to process.
In the past, be to generate nc program automatically with 5 softwares of Computerized three-dimensional, because 5 machining softwares of Computerized three-dimensional are the software of external exploitation, import price is extremely expensive, so the cable saddle processing cost is higher.And with this program processing, when processing was interrupted for some reason, tool setting was very difficult again.
The present invention generates nc program automatically without 5 softwares of Computerized three-dimensional, but the manual compiling nc program can be finished curved saddle groove processing equivalently, cuts down finished cost.
The core content of artificial programming is to set up mathematical model, the definition coordinate system.
Obviously, the key of dealing with problems is: nc program should be all the time is basic point with the rotation center of worktable, introduces anglec of rotation variable, obtains cutting tool path.
Mathematical model: workpiece is rotated around the facade circular arc center of circle, keep tool axis to pass through the facade circular arc center of circle all the time, the anglec of rotation is made as independent variable, whenever after processing an angle, program angle Automatic Cycle, increase progressively, calculate each corresponding axial coordinate value, the cutter path of rotation formation is the saddle channel process to profile continuously, thereby realizes that the saddle channel process is to processing.
If the lathe rotation center can overlap with workpiece facade center of arc, can the lathe rotation center be the program initial point promptly, this program is very simple: the X-axis coordinate be always " 0 ", and the Z axial coordinate is always the radius " R " of circular arc, the Y-axis coordinate is that " R*sina*tan β " is as Fig. 2-a, shown in Fig. 2-b.
In fact, the radius of workpiece (cable saddle) facade circular arc is all very big, its home position is outside the workpiece body, be subjected to the rotary table size restrictions, very difficult because of big, the heavy centering of workpiece external form simultaneously, can't guarantee that the lathe rotation center overlaps with workpiece facade center of arc, how set up the logical relation of lathe rotation center and workpiece facade center of arc, become the difficult point and the key of program for this reason.
Referring to Fig. 3-a, Fig. 3-b, Fig. 3-c, Fig. 3-d, by analysis, workpiece is in case in table positions, the position relation at workpiece center of arc and rotary table center is just determined, the worktable rotation, center of arc is just around the rotation of worktable rotation center, the known anglec of rotation, radius of turn, can calculate its postrotational position coordinate value, with this coordinate figure substitution front, problem just is readily solved.
Saddle groove program coordinate variable calculates:
1) setup parameter
The workpiece side facade is the XZ plane; Workpiece saddle groove face is the XY plane; Worktable rotation center coordinate is (0,0); Worktable rotates number of degrees a at every turn; Workpiece's Arc Radius R1; Plane included angle β;
2) X, Z coordinate determine: that utilizes numerically-controlled machine seeks the limit device, and (P1, P2), this center of arc is around the radius of turn R=(P1 at platen center to measure workpiece center of arc coordinate
2+ P2
2)
1/2, initial angle a0=artSIN (P1/P2); After the worktable rotation a angle, the coordinate of workpiece center of arc is [R*SIN (a0+a), R*COS (a0+a)], and then processing place X, Z coordinate are [R*SIN (a0+a), (R1-R*COSa)];
3) the Y coordinate is determined: after the worktable rotation a angle, workpiece center of arc is R*SIN (a0+a) in X axis displacement, and corresponding y-axis shift moves distance, and promptly the Y coordinate is R*SIN (a0+a) * TAN β.
In general, characteristics of the present invention are, as program initial sum end condition, anglec of rotation a is as loop variable with 2 angles of workpiece facade circular arc and Z axle, and X, Y, Z variable be as processing stand, machining programming.
Attached program source code is as follows:
N5?G00?G90?G80?G40
N15?G53
N20 Z0
N25?P25＝100?P19＝10?P20＝0?P25＝P25-P19?P07＝0?P23＝125?P17＝9
N65?P00＝36.685?P08＝0.100?P09＝13.315?P15＝15.175?P18＝14800?P21＝3200
N75?P04＝39.134?P06＝3638+P25?P14＝-219.5-P23?P10＝P18-P14
N12?5P01＝0P02＝-2000?N130?P03＝ATAN(P01/P02)-P09-P00
N135?P05＝SQRT(P01*P01+P02*P02)N140?P24＝0.45*P23
N145?P11＝P05*SIN(P03+P07)-P24?N150?P24＝P24*C0S(P09+P00-P07)
N155IF(P07GE(P09+P00))P24＝P24*C0S(P07-P09-P00)
N160P22＝P21*SIN(P07-P09-P00)-P24?N165?IF(P22?LE?0)P22＝0
N170P19＝P21*SIN(P00)?N175?P23＝P21*(SIN(P00)-SIN(P09+P00-P07))-P24
N180IF(P23?LE?0)P23＝0?N185?IF(P23GE?P19)P23＝P19
N190P02＝P21*(SIN(P00)+SIN(P04))N195?P01＝P22+P23-P02
N200?IF(P01?LE?0)P01＝0?N205?P22＝P22+P23?N210?IF(P22GE?P02)P22＝P02
N215?P12＝P10-SQRT(P10*P10-P22*P22)+P14+P01*TAN(P15)
N220?P16＝P06-P05*C0S(P03+P07)-P25?N225 G54
N230?IF(P07GT?0)G0T0?245?N235?XP11?Y0?B-P07
N240?Z(P16+P25)?F1000?S100?M03?N245?G01?XP11?YP12?ZP16?BP07
N250?P07＝P07+P08?N255?IF(P09+P00+P04+P09)GE?P07)G0T0?45
N270?IF(P25?GT?P20)G0T0?30
N275?M05
N280?M30
After the program composition, with computing machine debug, emulation, errorless back reaches lathe by the numerical control transmitting software, utilizes simulation software that lathe carries analogue simulation once more.
Add man-hour, workpiece is leveled up it behind the worktable installation in position, makes machined surface vertical with worktable, seeks the limit device with lathe again and finds out workpiece facade center of arc position, and the parameter value of its coordinate of substitution P1, P2 after trial cut is errorless, carries out cut again.
Though manual compiling program speed is slow, debug time is long, workpiece is behind the lathe location, and the parameter value according in its location updating variable program can overlap the program center with workpiece centre.When appearance processing is unusual, re-enter unusual preceding location parameter, can process again.Accelerate greatly so speed is restored in centering and tool setting, effectively improve working (machining) efficiency.The drawback slow to the speed of writing, that debug time is long can be by getting involved in advance, to reduce its influence.
When processing was interrupted for some reason, tool setting was very easy again, only need re-enter the coordinate initial value of parameter, got final product automatic tool preset.
Claims (3)
1. the job operation of a curved saddle groove of suspension bridge saddle, dispose an interlocked numerical controlled boring and milling machine of 4-coordinate, cable saddle is placed on the worktable of this boring and milling machine, and make the cable saddle plane vertical with work top, nc program control working angles by this boring and milling machine control system prestores processes curved saddle groove; It is characterized in that, earlier in cutting, according to the relative position of cable saddle and worktable, write nc program, with this programmed control working angles; Described nc program to write step as follows:
1) setup parameter
The workpiece facade is the XZ plane; Workpiece planarization is the XY plane; Worktable rotation center coordinate is (0,0); Worktable rotates number of degrees a at every turn; Workpiece's Arc Radius R1; Plane included angle β;
2) X, Z coordinate determine: that utilizes numerical control device seeks the limit device, and (P1, P2), this center of arc is around the radius of turn R=(p1 at platen center to measure workpiece center of arc coordinate
2+ P2
2)
1/2, initial angle a0=artSIN (P1/P2); After the worktable rotation a angle, the coordinate of workpiece center of arc is [R*SIN (a0+a), R*COS (a0+a)], and then processing place X, Z coordinate are [R*SIN (a0+a), (R1-R*COSa)];
3) the Y coordinate is determined: after the worktable rotation a angle, workpiece center of arc is R*SIN (a0+a) in X axis displacement, and corresponding y-axis shift moves distance, and promptly the Y coordinate is R*SIN (a0+a) * TAN β.
2. the job operation of curved saddle groove of suspension bridge saddle according to claim 1, it is characterized in that, after the establishment of described nc program, with computing machine debug, emulation, errorless back reaches lathe by the numerical control transmitting software, utilizes simulation software that lathe carries analogue simulation once more.
3. the job operation of curved saddle groove of suspension bridge saddle according to claim 1 is characterized in that, described workpiece is behind the worktable installation in position, seek the limit device with lathe and find out workpiece facade center of arc position, the parameter value of its coordinate of substitution P1, P2 after trial cut is errorless, carries out cut again.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910167616A CN101667028A (en) | 2009-09-09 | 2009-09-09 | Processing method of curved saddle groove of suspension bridge saddle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910167616A CN101667028A (en) | 2009-09-09 | 2009-09-09 | Processing method of curved saddle groove of suspension bridge saddle |
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| CN200910167616A Pending CN101667028A (en) | 2009-09-09 | 2009-09-09 | Processing method of curved saddle groove of suspension bridge saddle |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942805A (en) * | 2010-09-17 | 2011-01-12 | 广州瀚阳工程咨询有限公司 | Three-dimensional numerical control method for bridge section precasting technology |
| CN102756236A (en) * | 2012-07-11 | 2012-10-31 | 武汉船用机械有限责任公司 | Method for machining linear saddle groove of main cable saddle of suspension bridge |
| CN102866664A (en) * | 2012-09-21 | 2013-01-09 | 西安飞机工业（集团）有限责任公司 | Numerical-control machining method for parts with rotation center structures |
| CN103809511A (en) * | 2012-11-12 | 2014-05-21 | 中国南方航空工业(集团)有限公司 | Method for machining large and heavy box type parts at multi-spindle machining center |
| CN107186434A (en) * | 2017-06-02 | 2017-09-22 | 武汉船用机械有限责任公司 | A kind of main cable saddle of suspension bridge numerical control boring and milling back chipping method |
| CN111552234A (en) * | 2020-05-12 | 2020-08-18 | 广州达意隆包装机械股份有限公司 | Processing technology for four-axis linkage processing of sealing guide rail of bottle blowing machine |
| CN112454011A (en) * | 2019-09-09 | 2021-03-09 | 苏州微创骨科医疗工具有限公司 | Method and device for correcting coordinate offset of workpiece of multi-axis machine tool, computer equipment and medium |
-
2009
- 2009-09-09 CN CN200910167616A patent/CN101667028A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942805A (en) * | 2010-09-17 | 2011-01-12 | 广州瀚阳工程咨询有限公司 | Three-dimensional numerical control method for bridge section precasting technology |
| CN101942805B (en) * | 2010-09-17 | 2012-03-28 | 广州瀚阳工程咨询有限公司 | Three-dimensional numerical control method for bridge section precasting technology |
| CN102756236A (en) * | 2012-07-11 | 2012-10-31 | 武汉船用机械有限责任公司 | Method for machining linear saddle groove of main cable saddle of suspension bridge |
| CN102756236B (en) * | 2012-07-11 | 2014-06-25 | 武汉船用机械有限责任公司 | Method for machining linear saddle groove of main cable saddle of suspension bridge |
| CN102866664A (en) * | 2012-09-21 | 2013-01-09 | 西安飞机工业（集团）有限责任公司 | Numerical-control machining method for parts with rotation center structures |
| CN103809511A (en) * | 2012-11-12 | 2014-05-21 | 中国南方航空工业(集团)有限公司 | Method for machining large and heavy box type parts at multi-spindle machining center |
| CN107186434A (en) * | 2017-06-02 | 2017-09-22 | 武汉船用机械有限责任公司 | A kind of main cable saddle of suspension bridge numerical control boring and milling back chipping method |
| CN112454011A (en) * | 2019-09-09 | 2021-03-09 | 苏州微创骨科医疗工具有限公司 | Method and device for correcting coordinate offset of workpiece of multi-axis machine tool, computer equipment and medium |
| CN111552234A (en) * | 2020-05-12 | 2020-08-18 | 广州达意隆包装机械股份有限公司 | Processing technology for four-axis linkage processing of sealing guide rail of bottle blowing machine |
| CN111552234B (en) * | 2020-05-12 | 2021-08-20 | 广州达意隆包装机械股份有限公司 | Processing technology for four-axis linkage processing of sealing guide rail of bottle blowing machine |
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Open date: 20100310 |