CN101524776A - Orthogonal turn-milling method for rotary part - Google Patents
Orthogonal turn-milling method for rotary part Download PDFInfo
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- CN101524776A CN101524776A CN200810034201A CN200810034201A CN101524776A CN 101524776 A CN101524776 A CN 101524776A CN 200810034201 A CN200810034201 A CN 200810034201A CN 200810034201 A CN200810034201 A CN 200810034201A CN 101524776 A CN101524776 A CN 101524776A
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Abstract
The invention relates to an orthogonal turn-milling method for a rotary part. In the orthogonal turn-milling machining of the rotary part, an end mill and the rotary part rotate respectively; and the end mill is provided with a bottom blade and a side blade. The method is characterized in that in the process of orthogonal turn-milling machining, the bottom blade comprises the following process parameters: (1) a blade angle of the bottom blade of the end mill is more than 0 and less than 2 degrees; (2) the eccentric amount of the end mill is more than 4 and less than 9 mm; (3) the axial pushing amount of the end mill is 1/n of the diameter of a cutting tool, and the n is a natural number more than 1; and (4) the ratio N1/N2 of the rotational speed N1 of the end mill to the rotational speed N2 of the rotary part is more than 60. The orthogonal turn-milling method for the rotary part is an optimal combination of a set of process parameters and can expend less cost to reach the best machining effect of the rotary part in the turn-milling machining.
Description
Technical field
The present invention relates to machining, particularly relate to turnning and milling processing, the control by each machined parameters in the orthogonal turn-milling process is to reach the machining accuracy that improves rotary part.
Background technology
Turnning and milling is processed in the processing of the revolving parts that often is used in some large scales, special surface shape, such as impeller, screw rod etc.The surface accuracy of these parts requires generally higher, and working (machining) efficiency is lower.Machined parameters is the key factor that influences machined surface quality and working (machining) efficiency, and therefore, research turnning and milling machined parameters has important practical significance for improving crudy and working (machining) efficiency to the surface topography influence of workpiece.
Turnning and milling is that the resultant motion that utilizes milling cutter rotation and workpiece to rotate realizes the workpiece machining, and its method is divided into two kinds of axial turn-milling method and orthogonal turn-milling methods.The conventional method of research turnning and milling finished surface pattern is to adopt milling cutter to this thinking of workpiece envelope movement, the method that turnning and milling finished surface pattern is carried out geometrical analysis.In recent years, many scholars adopt this method, have provided the computational methods of turnning and milling processing rear surface roughness.But the micro-geometrical structure of finished surface is not only relevant with surface roughness, and is also relevant with the spread pattern of surface detail.The applicating geometric analytic approach can only obtain surface roughness, and can not obtain the spread pattern of surface detail, therefore can not obtain the micro-geometrical structure of finished surface.Study the optimal proportion that turnning and milling finished surface pattern just need work out the different values of each parameter of turnning and milling finished surface pattern.
There is certain understanding deviation in people to the surface topography of turnning and milling and the relation of machined parameters in the middle of the research and experiment of daily turnning and milling processing.For example think that milling cutter rotating speed and rotary part rotating speed in turnning and milling are high more good more, think that promptly rotating speed and machining accuracy are proportional, but find that through experiment the surface topography and the rotating speed of processing back part are not simple linear relationship; Again for example, the axial advance amount control of milling cutter often is difficult to hold when processing parts rotates a circle, and the relation of wayward its push-in stroke and machining accuracy or the like.
Summary of the invention
The objective of the invention is to by a large amount of experiments and build corresponding mathematics model, to seek the relation of rotary part each technological parameter and piece surface machining accuracy in orthogonal turn-milling processing.In the middle of reaching production practices, use appropriate working process parameter, farthest satisfy the Surface Machining precision of part.
Technical scheme of the present invention:
The present invention is to be research object with the orthogonal turn-milling process, at first sets up the Mathematical Modeling of blade, according to principle of coordinate transformation, derives in the process on the blade arbitrfary point with respect to the movement locus equation of workpiece; Then, on the three-dimensional grid model of definition, obtain the microscopic appearance on milling surface; At last, gone through tool point angle, offset, rotating ratio, and axial feeding to the influence of axial turn-milling finished surface pattern.
A kind of method of orthogonal turn-milling rotary part, in the orthogonal turn-milling processing of rotary part, each spinning of end mill(ing) cutter and rotary part, described end mill(ing) cutter has shear blade and side edge, it is characterized in that, and in the orthogonal turn-milling process, the technological parameter of shear blade is as follows:
1. the tool point angle of end mill(ing) cutter shear blade is greater than 0 ℃, less than 2 ℃;
2. the offset of end mill(ing) cutter is greater than 4mm, less than 9mm;
3. the axial advance amount of end mill(ing) cutter is the 1/n of tool diameter, and n is the natural number greater than 1.
4. the rotational speed N 1 of end mill(ing) cutter is N1/N2＞60 with the ratio of the rotational speed N 2 of rotary part.
As a kind of prioritization scheme, the axial advance amount of described end mill(ing) cutter is greater than 7.5mm.
As another kind of prioritization scheme, the rotational speed N 1 of end mill(ing) cutter is 140＞N1/N2＞60 with the ratio of the rotational speed N 2 of rotary part.
Technique effect of the present invention:
The method that the present invention improves rotary part machining accuracy in orthogonal turn-milling has been used as analysis by a large amount of experiments and establishment analog simulation software to what rotary part played in orthogonal turn-milling processing, draw one group of optimum process parameters combination at last.Utilize this group parameter combinations can solve in the conventional art and improve rotating speed blindly, reduce or increase the time-consuming and effect of effort that method such as push-in stroke brings greatly less than the problem that requires in order to improve machining accuracy.In process parameters range of the present invention, select best combination, can spend less cost and reach best processing effect.
The specific embodiment
Elaborate the method for machining accuracy in the orthogonal turn-milling of the present invention below with specific embodiment.To adopt orthogonal manner processing rotary part screw rod spare to come practical application processing method of the present invention.Its initial manufacture technological parameter is:
The radius R 1=25mm of milling cutter; Workpiece radius R2=50mm; Blade is counted Z=4;
The rotational speed N 1 of milling cutter is 30 with the ratio of the rotational speed N 2 of workpiece; Axial push-in stroke is 18mm/r; The length of milling cutter is 60mm.
Under above-mentioned processing conditions, adopt orthogonal turn-milling processing back workpiece surface appearance situation to be: surface of the work has regular prism, and these ribs are parallel to each other, and is parallel to work centre line.
Make rotating ratio N1/N2 greater than 60, and to get axial feeding be 14,18 and 22mm/r, the pass of trying to achieve rotating ratio and surface topography is: when rotating ratio increased, the roughness of surface of the work descended.
From 0 °～2 ° variations, and make axial feeding when 10-35mm/r changes tool point angle, try to achieve the blade number and the finished surface pattern is: when tool point angle rose, machined surface roughness descended, but fall is relevant with axial feeding.When the amount of feeding changed, the machined surface roughness amplitude of variation that tool point angle is 1 ° was less than the surface roughness of 0 ° of tool point angle.
There is square undulation in the surface topography that tool point angle is 1 °, and that tool point angle is 2 ° a surface topography is smooth than 1 ° of 1 tool point angle, do not observed square undulation, so its surface roughness is lower, and surface topography is also better.
When axial feeding under the above-mentioned original state is changed in the 10-35mm/r scope, what try to achieve the relation of the amount of feeding and surface roughness and the amount of feeding and surface topography is: surface roughness rises along with the increase of the amount of feeding generally, but descends again in certain section.The amount of feeding of minimal surface roughness correspondence is respectively 30,20, and 15,12,10 etc.If divided by this ordered series of numbers, then just in time become natural sequence 2,3,4,5,6 etc. with tool diameter 60.In other words, when the amount of feeding was the 1/n (n is the natural number greater than 1) of tool diameter, surface roughness obtained minimum.Select 5 minimums, 1/2 to 1/6 of the corresponding tool length of difference.
It is as follows that the milling cutter amount of feeding equals 15 to 20mm/r finished surface topographic profile: when the amount of feeding was 15mm/r, surface of the work was smooth, did not have square undulation, and this moment, machined surface roughness reached a minimum.Increase with the amount of feeding, square wavy projection appears in surface of the work, and the jut width constantly increases, but the relative altitude of jut descends gradually, so surface roughness is on a declining curve.When the amount of feeding increased to 20mm/r, jut covered surface of the work fully, and it is smooth that surface of the work recovers once more, and machined surface roughness also reaches another minimum.Workpiece surface appearance illustrates with the variation tendency of the amount of feeding: when the amount of feeding was not equal to the 1/n of tool length, finished surface rose and fell big, had square wavy pattern to occur; When the amount of feeding equaled the 1/n of tool length, then surface topography was smooth.Being noted that simultaneously that axial turn-milling adds adopts the less amount of feeding to differ to obtain less surface roughness surely man-hour, and having only the amount of feeding of selection is the 1/n of tool length, just can obtain less surface roughness and surface topography preferably.
Embodiment 1
Adopt the method for machining accuracy in the orthogonal turn-milling in the present embodiment, in the orthogonal turn-milling processing of rotary part, each spinning of end mill(ing) cutter and rotary part, described end mill(ing) cutter has shear blade and side edge, it is characterized in that in the orthogonal turn-milling process, the technological parameter of shear blade is as follows:
1. the tool point angle of end mill(ing) cutter shear blade is 1 ℃;
2. the offset of end mill(ing) cutter is greater than being 7.5mm;
3. the axial advance amount of end mill(ing) cutter is the 1/5=10mm of tool diameter 50mm.
4. the rotational speed N 1 of end mill(ing) cutter is N1/N2=80 with the ratio of the rotational speed N 2 of rotary part.
The roughness that processes workpiece under the above-mentioned parameter is 15.1 μ m.
Claims (3)
1. the method for an orthogonal turn-milling rotary part, in the orthogonal turn-milling processing of rotary part, each spinning of end mill(ing) cutter and rotary part, described end mill(ing) cutter has shear blade and side edge, it is characterized in that, and in the orthogonal turn-milling process, the technological parameter of shear blade is as follows:
1. the tool point angle of end mill(ing) cutter shear blade is greater than 0 ℃, less than 2 ℃;
2. the offset of end mill(ing) cutter is greater than 4mm, less than 9mm;
3. the axial advance amount of end mill(ing) cutter is the 1/n of tool diameter, and n is the natural number greater than 1.
4. the rotational speed N 1 of end mill(ing) cutter is N1/N2＞60 with the ratio of the rotational speed N 2 of rotary part.
2. the method for orthogonal turn-milling rotary part according to claim 1 is characterized in that, the axial advance amount of described end mill(ing) cutter is greater than 7.5mm.
3. the method for orthogonal turn-milling rotary part according to claim 1 and 2 is characterized in that, the rotational speed N 1 of end mill(ing) cutter is 140＞N1/N2＞60 with the ratio of the rotational speed N 2 of rotary part.
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| CN200810034201A CN101524776A (en) | 2008-03-04 | 2008-03-04 | Orthogonal turn-milling method for rotary part |
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| CN200810034201A CN101524776A (en) | 2008-03-04 | 2008-03-04 | Orthogonal turn-milling method for rotary part |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102581620A (en) * | 2012-03-14 | 2012-07-18 | 北京航空航天大学 | Method for turning and milling to realize typical characteristics of aircraft landing gear |
| CN102653013A (en) * | 2012-04-16 | 2012-09-05 | 华中科技大学 | Orthogonal turn-milling wide line processing method based on eccentric distance optimization |
| CN102941372A (en) * | 2012-10-11 | 2013-02-27 | 沈阳理工大学 | Large caliber thick-walled tube turn-milling processing method |
| CN103157841A (en) * | 2013-04-07 | 2013-06-19 | 沈阳理工大学 | Efficient orthogonal turn-milling rough machining method of large-diameter steel rod material |
| CN103286360A (en) * | 2012-03-02 | 2013-09-11 | 沈阳黎明航空发动机(集团)有限责任公司 | Tangential offset orthogonal turn-milling machining method |
| CN110280818A (en) * | 2019-07-01 | 2019-09-27 | 苏州真懿精密器械有限公司 | The method for promoting micro parts Milling Process surface roughness |
-
2008
- 2008-03-04 CN CN200810034201A patent/CN101524776A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103286360A (en) * | 2012-03-02 | 2013-09-11 | 沈阳黎明航空发动机(集团)有限责任公司 | Tangential offset orthogonal turn-milling machining method |
| CN103286360B (en) * | 2012-03-02 | 2015-12-02 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of tangential offset orthogonal turn-milling cutting method |
| CN102581620A (en) * | 2012-03-14 | 2012-07-18 | 北京航空航天大学 | Method for turning and milling to realize typical characteristics of aircraft landing gear |
| CN102581620B (en) * | 2012-03-14 | 2013-11-06 | 北京航空航天大学 | Method for turning and milling to realize typical characteristics of aircraft landing gear |
| CN102653013A (en) * | 2012-04-16 | 2012-09-05 | 华中科技大学 | Orthogonal turn-milling wide line processing method based on eccentric distance optimization |
| CN102653013B (en) * | 2012-04-16 | 2013-10-30 | 华中科技大学 | Orthogonal turn-milling wide line processing method based on eccentric distance optimization |
| CN102941372A (en) * | 2012-10-11 | 2013-02-27 | 沈阳理工大学 | Large caliber thick-walled tube turn-milling processing method |
| CN102941372B (en) * | 2012-10-11 | 2015-04-08 | 沈阳理工大学 | Large caliber thick-walled tube turn-milling processing method |
| CN103157841A (en) * | 2013-04-07 | 2013-06-19 | 沈阳理工大学 | Efficient orthogonal turn-milling rough machining method of large-diameter steel rod material |
| CN110280818A (en) * | 2019-07-01 | 2019-09-27 | 苏州真懿精密器械有限公司 | The method for promoting micro parts Milling Process surface roughness |
| CN110280818B (en) * | 2019-07-01 | 2021-02-02 | 苏州真懿精密器械有限公司 | Method for improving surface roughness of micro part in milling process |
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Open date: 20090909 |