CN110968041A - Method for compiling multi-axis linkage numerical control machining program - Google Patents
Method for compiling multi-axis linkage numerical control machining program Download PDFInfo
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- CN110968041A CN110968041A CN201811151537.2A CN201811151537A CN110968041A CN 110968041 A CN110968041 A CN 110968041A CN 201811151537 A CN201811151537 A CN 201811151537A CN 110968041 A CN110968041 A CN 110968041A
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- numerical control
- machining
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- axis linkage
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/4097—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by using design data to control NC machines, e.g. CAD/CAM
- G05B19/4099—Surface or curve machining, making 3D objects, e.g. desktop manufacturing
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/35—Nc in input of data, input till input file format
- G05B2219/35026—Design of machine tool, of cnc machine
Abstract
The invention provides a method for compiling a multi-axis linkage numerical control machining program, which is used for roughly machining a workpiece, wherein the workpiece comprises an annular bottom surface and a plurality of bosses protruding out of the annular bottom surface, and the method comprises the following steps: establishing a 3D model of a workpiece; projecting the plurality of bosses on a reference plane and expanding to obtain a group of contour lines; manufacturing a plane machining path according to the contour line and outputting a point location coordinate file; establishing a spline curve according to the point position coordinates, and winding the spline curve on the outer edge circumferential surface of the workpiece to obtain a group of 3D curves; making an initial path curve of the multi-axis linkage feed by using the 3D curve; and the initial path curve is offset along the radial direction of the annular bottom surface to obtain a final path, an end point coordinate file is manufactured, and the end point coordinate file is input into the multi-axis linkage numerical control machine tool to program a machining program. The machining program compiled by the method can control the cutter to finish rough machining by one-time feeding, has high machining efficiency and uniform machining allowance, and is convenient for subsequent finish machining.
Description
Technical Field
The invention relates to the field of numerical control machining, in particular to a method for compiling a multi-axis linkage numerical control machining program.
Background
The periphery of the cam type workpiece is in an irregular boss shape, the rough machining of the cam type workpiece needs to remove redundant parts between bosses, and then the side face and the top face of each boss and other surfaces of the workpiece are subjected to finish machining. The traditional multi-axis rough machining method is characterized in that a workpiece is fixed at an angle and then three-axis linkage machining is carried out. The periphery of the workpiece is processed by at least four times of fixed angle conversion. Namely, the side surface of the boss can be finely machined after multiple times of rough machining. This results in long idle feed time and low processing efficiency. And the subsequent finish machining allowance is not uniform due to the fact that the angle is changed for multiple times, and interference is caused to the finish machining of the boss.
Disclosure of Invention
In view of the above, it is necessary to provide a method for creating a multi-axis linkage numerical control machining program to solve the above problems.
The invention provides a method for compiling a multi-axis linkage numerical control machining program, which is used for roughly machining a workpiece, wherein the workpiece comprises an annular bottom surface and a plurality of bosses protruding out of the annular bottom surface, and the method comprises the following steps:
establishing a 3D model of the workpiece;
projecting the bosses on a reference plane and expanding to obtain a group of contour lines;
manufacturing a plane machining path according to the contour line and outputting a point location coordinate file;
establishing a spline curve according to the point position coordinate, and winding the spline curve on the outer edge circumferential surface of the workpiece to obtain a group of 3D curves;
making an initial path curve of the multi-axis linkage feed by using the 3D curve;
offsetting the initial path curve along the radial direction of the annular bottom surface to obtain a final path and manufacturing a final position coordinate file, an
And inputting the terminal position coordinate file into the multi-axis linkage numerical control machine tool to program a machining program.
The machining program compiled by the method can control the cutter to finish rough machining by one-time feeding, namely, the redundant parts among the plurality of bosses are removed, the machining efficiency is high, the machining allowance is uniform, and the subsequent finish machining is facilitated.
Drawings
Fig. 1 is a flowchart of a method for creating a multi-axis linked numerical control machining program according to an embodiment of the present invention.
Fig. 2 is a perspective view of a workpiece according to an embodiment of the invention.
Fig. 3 is a schematic view of a planar processing path according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a 3D curve of an embodiment of the present invention.
FIG. 5 is a schematic diagram of an initial path curve of an embodiment of the present invention.
Description of the main elements
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, an embodiment of the present invention provides a method for programming a multi-axis linkage numerical control machining program for rough machining a blank to form a workpiece 100, the method including the following steps:
s101, establishing a 3D model of the workpiece 100.
Referring to fig. 2, the workpiece 100 includes a circular bottom surface 10 and a plurality of bosses 20 protruding from the circular bottom surface 10.
In this embodiment, the number of the bosses 20 is 5, and the structure is different, but not limited thereto. In other embodiments, the number of bosses 20 may be one, two, or other, and the structure of the bosses 20 may be the same.
In this embodiment, the annular bottom surface 10 is a circumferential surface, but is not limited thereto. For example, in other embodiments, the annular bottom surface 10 may be designed such that part of the surface is a circumferential surface and the rest of the surface is a flat surface.
In the present embodiment, the side surface 21 of the boss 20 is a plane, but is not limited thereto. It is understood that in other embodiments, the side surface 21 of the boss 20 may be curved.
S102, projecting a plurality of bosses 20 on a reference plane 200 and expanding to obtain a group of contour lines 202.
Referring to fig. 2, in the present embodiment, the reference plane 200 is tangent to the outer circumferential surface 25 of the workpiece 100. The outer circumferential surface 25 is a circumferential surface having a radius equal to the maximum distance between the top surface 23 of the plurality of bosses 20 and the central axis O of the annular bottom surface 10.
Starting from the tangent 201, the workpiece 100 rolls along the reference plane 200 while ensuring that the central axis O of the annular bottom surface 10 is parallel to the tangent 201 and the distance from the central axis O to the reference plane 200 is the same. As the workpiece 100 rolls, the plurality of lands 20 project onto the datum plane 200 to form a set of contour lines 202.
It is understood that the contour 202 may be a straight line or a curved line.
When the projection of the boss 20 on the reference plane 200 has a plurality of contour lines 202, the outer contour line 203 is the outermost contour line 202. For example, when the boss 20 is a frustum of a cone, the contour 202 of the boss 20 projected on the reference plane 200 has an inner circular ring and an outer circular ring, and the outer contour 203 is an outer circular ring.
S103, a plane machining path 209 is manufactured according to the contour line 202 and a point coordinate file is output.
Referring to fig. 2 and 3, the reference line 205 is obtained by taking the outer contour 203 of each projection 20 projected on the reference plane 200 as a boundary and outwardly offsetting a distance 207 along the normal direction of the outer contour 203. A planar processing path 209 and point coordinates are created from the datum 205. Wherein the distance 207 is equal to the finishing allowance of the side face 21 of the boss 20.
S104, establishing a spline curve according to the point position coordinates, and winding the spline curve on the outer circumferential surface 25 of the workpiece 100 to obtain a group of 3D curves 300, as shown in FIG. 4.
S105, a primary path curve 400 of the multi-axis linkage feed is made according to the 3D curve 300.
Referring to fig. 5, a 3D curve 300 wound on the circumferential surface 25 of the outer edge of the workpiece 100 is projected on the annular bottom surface 10 along the radial direction of the annular bottom surface 10 to obtain an initial path curve 400.
And S106, offsetting the initial path curve 400 along the radial direction of the annular bottom surface 10 to obtain a final path and manufacturing a final position coordinate file.
Wherein the radial offset along the annular bottom surface 10 is equal to the axial feed of a machining spindle (not shown).
And S107, inputting the end point coordinate file into the multi-axis linkage numerical control machine tool to program a machining program.
The multi-axis linkage numerical control machining is four-axis linkage numerical control machining or five-axis linkage numerical control machining.
The machining program compiled by the method can control the cutter to finish rough machining by one-time feeding, namely, redundant parts among the plurality of bosses 20 are removed, the machining efficiency is high, the machining allowance is uniform, and the subsequent finish machining is facilitated.
In addition, other modifications within the spirit of the invention will occur to those skilled in the art, and it is understood that such modifications are included within the scope of the invention as claimed.
Claims (7)
1. A method for compiling a multi-axis linkage numerical control machining program is used for roughly machining a workpiece, wherein the workpiece comprises an annular bottom surface and a plurality of bosses protruding out of the annular bottom surface, and the method is characterized in that: the method comprises the following steps:
establishing a 3D model of the workpiece;
projecting the bosses on a reference plane and expanding to obtain a group of contour lines;
manufacturing a plane machining path according to the contour line and outputting a point location coordinate file;
establishing a spline curve according to the point position coordinate, and winding the spline curve on the outer edge circumferential surface of the workpiece to obtain a group of 3D curves;
making an initial path curve of the multi-axis linkage feed by using the 3D curve;
offsetting the initial path curve along the radial direction of the annular bottom surface to obtain a final path and manufacturing a final position coordinate file, an
And inputting the terminal position coordinate file into the multi-axis linkage numerical control machine tool to program a machining program.
2. The method for preparing a multi-axis linkage numerical control machining program according to claim 1, wherein the step of preparing a plane machining path according to the contour line and outputting a point coordinate file comprises: and taking the outer contour line projected on the reference plane by each boss as a boundary, outwards offsetting a distance along the normal direction of the outer contour line to obtain a reference line, and manufacturing a plane machining path and point position coordinates according to the reference line.
3. The method for programming a multi-axis linked numerical control machining program according to claim 2, characterized in that: the distance is equal to the finishing allowance of the side face of the boss.
4. The method for programming a multi-axis linked numerical control machining program according to claim 2, characterized in that: the contour lines are straight lines or curved lines.
5. The method for creating a multi-axis linkage numerical control machining program according to claim 1, wherein the step of creating a primary path curve of the multi-axis linkage feed in a 3D curve includes: and projecting the 3D curve on the annular bottom surface along the radial direction of the annular bottom surface to obtain an initial path curve.
6. The method for programming a multi-axis linked numerical control machining program according to claim 1, characterized in that: in the step of obtaining the final path by the radial offset of the initial path curve along the annular bottom surface, the radial offset distance is equal to the axial feed amount of the machining spindle.
7. The method for programming a multi-axis linked numerical control machining program according to claim 1, characterized in that: the multi-axis linkage numerical control machining is four-axis linkage numerical control machining or five-axis linkage numerical control machining.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811151537.2A CN110968041A (en) | 2018-09-29 | 2018-09-29 | Method for compiling multi-axis linkage numerical control machining program |
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| CN201811151537.2A CN110968041A (en) | 2018-09-29 | 2018-09-29 | Method for compiling multi-axis linkage numerical control machining program |
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Citations (5)
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|---|---|---|---|---|
| CN102218578A (en) * | 2011-05-26 | 2011-10-19 | 东南大学 | Path planning method for complicated-shape workpiece of robot bead weld based on radial bias |
| CN102794491A (en) * | 2012-08-22 | 2012-11-28 | 浙江大学 | Device and method of automatic helical milling of hole |
| CN103537743A (en) * | 2013-10-05 | 2014-01-29 | 成都泛华航空仪表电器有限公司 | Multi-axis curved surface type numerically-controlled method for machining complicated curved surface part |
| CN103949705A (en) * | 2014-05-14 | 2014-07-30 | 南京航空航天大学 | Cycloid and spiral composite milling method for web with slot features |
| CN106292545A (en) * | 2016-08-18 | 2017-01-04 | 四川泛华航空仪表电器有限公司 | The method utilizing macroprogram digital control processing Cylinder Surface |
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2018
- 2018-09-29 CN CN201811151537.2A patent/CN110968041A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102218578A (en) * | 2011-05-26 | 2011-10-19 | 东南大学 | Path planning method for complicated-shape workpiece of robot bead weld based on radial bias |
| CN102794491A (en) * | 2012-08-22 | 2012-11-28 | 浙江大学 | Device and method of automatic helical milling of hole |
| CN103537743A (en) * | 2013-10-05 | 2014-01-29 | 成都泛华航空仪表电器有限公司 | Multi-axis curved surface type numerically-controlled method for machining complicated curved surface part |
| CN103949705A (en) * | 2014-05-14 | 2014-07-30 | 南京航空航天大学 | Cycloid and spiral composite milling method for web with slot features |
| CN106292545A (en) * | 2016-08-18 | 2017-01-04 | 四川泛华航空仪表电器有限公司 | The method utilizing macroprogram digital control processing Cylinder Surface |
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| 傅伟等: "数控四轴旋转刀轨优化技术的研究", 《工具技术》 * |
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