CN103447756B - Accurate reference sphere combined machining method - Google Patents
Accurate reference sphere combined machining method Download PDFInfo
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- CN103447756B CN103447756B CN201210177256.0A CN201210177256A CN103447756B CN 103447756 B CN103447756 B CN 103447756B CN 201210177256 A CN201210177256 A CN 201210177256A CN 103447756 B CN103447756 B CN 103447756B
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Abstract
The present invention discloses a kind of accurate reference sphere combined machining method, and the method comprises the steps：The turning bars on complex milling machine tool, the gyroaxis for adjusting bar are coaxial with the main shaft of complex milling machine tool；The position of the gyroaxis of amendment unit head so as to be not more than 0.003mm with the axiality of the main shaft of complex milling machine tool；Bar described in roughing, formation leave the rough turn ball of surplus；The gyroaxis of motivation of adjustment head with the angle of the main shaft of complex milling machine tool is；The centre of sphere of rough turn ball described in centering；The rotating speed of setting unit head is not more than 1000r/min, and the speed of mainshaft of complex milling machine tool is not more than 1r/min, along the intersection point of sphere of the direction feed to rough turn ball and the complex milling machine tool of the gyroaxis of unit head, rough turn ball described in polish.The high precision of the reference sphere of present invention processing.
Description
Technical field
The present invention relates to the processing method of sphere, more particularly to the accurate reference sphere combined machining method of space circle envelope.
Background technology
Accurate reference sphere serves as detecting benchmark that Geometrical Tolerance Principle is harsh（Sphere circularity is not more than 0.005mm）.Interpolation
Circular path turning is the traditional method of sphere processing.The method principle is simple, but affects the factor of spherical configuration precision more,
Position error, dynamic error such as machine tool motion axle, digital control system error of interpolation etc., sphere crudy is not high（Sphere circularity
Typically in more than 0.01mm）.There is the problems such as working (machining) efficiency is low, and concordance is poor in grinding mode.
There is United States Patent (USP) No.1,663,192 about the patent of sphere teeth processing route generating method.The patent is employed
The method for increasing auxiliary body on lathe saddle swings cutter, so as to complete sphere processing.Detailed process is installed on knife rest
Auxiliary body, realizes that cutter is rotated around the axle perpendicular to lathe spindle, under lathe spindle high rotational speeds, manually adjusts
Section rocking handle changes tool position, completes sphere processing.The error of cutter moving interpolation is avoided in this way.But auxiliary machine
Structure design is complicated, and the gap of component, machining accuracy etc. introduce new error source, and is processed ball and is rotated together with main shaft at a high speed,
Manufacturability is not high.In addition, document [Topological and Kinematic analysis applied for 5-axis
Spherical precision grinding machine] in propose a kind of accurate sphere grinding processing method, the method
Molding cutter is needed, working (machining) efficiency is not high, and the impact to sphere machining accuracy such as machine tool motion axle dynamic error cannot be avoided.
The content of the invention
The problem that the present invention is solved is that the sphere precision of the reference sphere of existing sphere processing method processing is low low with efficiency
Problem.
To solve the above problems, the present invention provides a kind of accurate reference sphere combined machining method, and the method includes following step
Suddenly：The turning bars on complex milling machine tool, the gyroaxis for adjusting bar are coaxial with the main shaft of complex milling machine tool；Amendment power
The position of the gyroaxis of head so as to be not more than 0.003mm with the axiality of the main shaft of complex milling machine tool；Rod described in roughing
Material, formation leave the rough turn ball of surplus；The gyroaxis of motivation of adjustment head with the angle of the main shaft of complex milling machine tool is, in formula,Bar near one section of spillikin of rough turn ball radius,Be reference sphere radius,It is
The distance between the intersection point of the diameter of the diameter and reference sphere of spillikin and the end points of diameter of the reference sphere；Rough turn ball described in centering
The centre of sphere；The rotating speed of setting unit head is not more than 1000r/min, and the speed of mainshaft of complex milling machine tool is not more than 1r/min, edge
The intersection point of sphere of the direction feed of the gyroaxis of unit head to rough turn ball and complex milling machine tool, rough turn ball described in polish.
Alternatively, the axiality is not more than 0.002mm.
Alternatively, the surplus is not more than 1mm.
Alternatively, the surplus is not more than 0.5mm.
Alternatively, the concrete steps of the centre of sphere of the rough turn ball of the centering include along the major axes orientation of complex milling machine tool looking for
The centre of sphere of just rough turn ball.
Alternatively, the rotating speed of the unit head is 800r/min, and the speed of mainshaft of complex milling machine tool is 0.5r/min.
Compared with prior art, the present invention has advantages below：
The present invention is not more than 1000r/min by setting the rotating speed of unit head, and the rotating speed of the main shaft of complex milling machine tool is not
More than 1r/min, along the intersection point of sphere of the direction feed to rough turn ball and the complex milling machine tool of the gyroaxis of unit head, so,
The sphere of reference sphere is equivalent to the motion envelope face of two circles for having spatial relation, then using the gyroaxis of unit head
The position relationship of power unit of machine tool and main shaft is defined with the angle of the main shaft of complex milling machine tool, so as to by synthesizing turnning and milling
The unit head gyration of combined machine is moved with the main shaft gyration of complex milling machine tool, is formed sphere machining locus, and then is obtained
To the corresponding kinematic parameter of each axle of complex milling machine tool, carry out sphere high accuracy and process, greatly reduce sphere manufacturing tolerance
Source, sphere machining accuracy are only affected by positional precision between the gyroaxis of the main shaft and unit head of complex milling machine tool, no
There is error of interpolation, position error and machine tool motion axle dynamic error, the machining accuracy of sphere is high.
Description of the drawings
Fig. 1 is the structural representation of precision reference sphere combined machining method of the invention；
Fig. 2 is schematic diagram of the gyroaxis with the angle of the main shaft of complex milling machine tool for calculating unit head.
Specific embodiment
To describe technology contents, structural features, institute's reached purpose and effect of the present invention in detail, below in conjunction with embodiment
And coordinate accompanying drawing to be described in detail.
Fig. 1 and Fig. 2 is referred to, present invention precision reference sphere combined machining method comprises the steps：
S1：Turning bars 1 on complex milling machine tool, adjusts the gyroaxis 11 of bar 1 and the main shaft of complex milling machine tool
Coaxially, the circularity of accurate reference sphere is coaxially ensure that by the main shaft of the gyroaxis 11 and complex milling machine tool that adjust bar 1.
S2：The position of the gyroaxis 21 of amendment unit head 2 so as to be not more than with the axiality of the main shaft of complex milling machine tool
0.003mm, by correcting the gyroaxis 21 of unit head 2 and the axiality of the main shaft of complex milling machine tool, it is ensured that accurate benchmark
The circularity of ball, such as, in the case of axiality no more than 0.003mm, ensure that sphere precision within 0.005mm, such as
Fruit to be made the sphere precision of reference sphere within 0.003mm, the axiality no more than 0.002mm.
S3：The rough turn ball 12 of surplus is left in bar 1 described in roughing, formation.So, it is divided into equivalent to the bar 1
Three parts, this three part are rough turn ball 12, the spillikin 13 of close rough turn ball 12 and cylindrical portion 14 respectively.The surplus is not more than 1,
Surplus can also be not more than 0.5mm, or monolateral surplus is not more than 0.5mm, and the basis that selects of surplus adds to reference sphere
Work precision（Sphere circularity）Depending on requirement, such as, in machining accuracy（Sphere circularity）During no more than 0.005mm, monolateral surplus is not
More than 0.5mm.
S4:The gyroaxis 21 of motivation of adjustment head 2 with the angle of the main shaft of complex milling machine tool is,
In formula,Bar near one section of spillikin of rough turn ball radius,Be reference sphere radius,It is the diameter and reference sphere of spillikin
The distance between the end points of diameter of intersection point and the reference sphere of diameter, by controlling the angle, reference sphere can be controlled
Machining accuracy（Sphere circularity）, the diameter of the radius d of spillikin perpendicular to reference sphere, so, it is fixed according to the geometry of right angled triangle
Reason, you can obtain above-mentioned formula, by above-mentioned formula can according to the d, R directly obtained in measurement or design,Calculate
To the gyroaxis 21 and the angle of the main shaft of complex milling machine tool, and further determine that the position of the centre of sphere of the rough turn ball.
S5：The centre of sphere of rough turn ball 12 described in centering, after the centre of sphere for finding rough turn ball 12 accurately, complex milling machine tool can be with root
Reference position is obtained according to the position of the centre of sphere, it is ensured that the machining accuracy of reference sphere（Sphere circularity）, in the present embodiment, be along
The sphere of the rough turn ball of the major axes orientation centering of car system combined machine 12.
S6：The rotating speed of setting unit head 2 is not more than 1000r/min, and the rotating speed of the main shaft of complex milling machine tool is not more than 1r/
Min, along the intersection point of sphere of the direction feed to rough turn ball 12 and the complex milling machine tool of the gyroaxis of unit head 2, polish institute
Rough turn ball 12 is stated, such as, as shown in figure 1, the direction shown in complex milling machine tool along arrow A rotates, unit head 2 is along arrow
Direction shown in B rotates.It is not more than 1000r/min, the rotating speed of the main shaft of complex milling machine tool by arranging the rotating speed of unit head 2
No more than 1r/min, in this manner it is ensured that the sphere precision of reference sphere（Sphere circularity）Within 0.005mm, if it is desired that base
The sphere precision of quasi- ball（Sphere circularity）In the range of 0.003, the rotating speed of the unit head is 800r/min, complex milling machine tool
The speed of mainshaft be 0.5r/min.
In the present invention, by the motion envelope face that spherical equivalent is two circles for having spatial relation, the two spaces
Position relationship passes throughTo determine, and respectively by high speed rotation and the complex milling machine tool of unit head
Low speed rotation synthesizing the motion of the main shaft and unit head of complex milling machine tool, so as to be added by way of space circle envelope
Work bar and obtain precision reference sphere, greatly reduce sphere manufacturing tolerance source, sphere machining accuracy（Sphere circularity）
Only by positional precision between the main shaft and the gyroaxis of unit head of complex milling machine tool（Sphere circularity）Impact, it is such as, and existing
Have turnery processing mode to compare, the method causes each motion shaft position of lathe to fix, rigidity is good, do not exist digital control system interpolation or
The impact of dynamic error etc..Compared with method for grinding, the method is high in machining efficiency.
Claims (6)
1. a kind of accurate reference sphere combined machining method, it is characterised in that：The method comprises the steps：
The turning bars on complex milling machine tool, the gyroaxis for adjusting bar are coaxial with the main shaft of complex milling machine tool；
The position of the gyroaxis of amendment unit head so as to be not more than 0.003mm with the axiality of the main shaft of complex milling machine tool；
Bar described in roughing, formation leave the rough turn ball of surplus；
The gyroaxis of motivation of adjustment head with the angle of the main shaft of complex milling machine tool is, in formula,It is rod
The radius of one section of spillikin of the close rough turn ball of material,Be reference sphere radius,It is the friendship of the diameter of the diameter and reference sphere of spillikin
In point and the distance between two end points of the diameter of the reference sphere, less distance；
The centre of sphere of rough turn ball described in centering；
The rotating speed of setting unit head is not more than 1000r/min, and the speed of mainshaft of complex milling machine tool is not more than 1r/min, along power
The intersection point of sphere and complex milling machine tool of the direction feed of the gyroaxis of head to rough turn ball, rough turn ball described in polish.
2. accurate reference sphere combined machining method according to claim 1, it is characterised in that：The axiality is not more than
0.002mm。
3. accurate reference sphere combined machining method according to claim 1, it is characterised in that：The surplus is not more than 1mm.
4. accurate reference sphere combined machining method according to claim 1, it is characterised in that：The surplus is not more than
0.5mm。
5. accurate reference sphere combined machining method according to claim 1, it is characterised in that：The ball of the rough turn ball of the centering
The concrete steps of the heart include the centre of sphere of the rough turn ball of major axes orientation centering along complex milling machine tool.
6. accurate reference sphere combined machining method according to claim 1, it is characterised in that：The rotating speed of the unit head is
800r/min, the speed of mainshaft of complex milling machine tool is 0.5r/min.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10136108A1 (en) * | 2001-07-26 | 2003-02-13 | Theodor Stief | Machining device for producing ball studs on lathe has rotatable cutting tool rotating about rotary axis which intersects spindle axis and includes obtuse angle with same |
| CN1710281A (en) * | 2004-06-17 | 2005-12-21 | 无锡市天伦汽车配件制造有限公司 | Dual-ball connecting rod working method for automobile air-conditioner compressor |
| CN101100039A (en) * | 2007-08-03 | 2008-01-09 | 北京蒙太因医疗器械有限公司 | Method and device for processing part with partial spherical surface in artificial hip prosthesis |
| CN102275114A (en) * | 2011-08-29 | 2011-12-14 | 机械工业第三设计研究院 | Novel spherical grinding machine tool and grinding method thereof |
-
2012
- 2012-06-01 CN CN201210177256.0A patent/CN103447756B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10136108A1 (en) * | 2001-07-26 | 2003-02-13 | Theodor Stief | Machining device for producing ball studs on lathe has rotatable cutting tool rotating about rotary axis which intersects spindle axis and includes obtuse angle with same |
| CN1710281A (en) * | 2004-06-17 | 2005-12-21 | 无锡市天伦汽车配件制造有限公司 | Dual-ball connecting rod working method for automobile air-conditioner compressor |
| CN101100039A (en) * | 2007-08-03 | 2008-01-09 | 北京蒙太因医疗器械有限公司 | Method and device for processing part with partial spherical surface in artificial hip prosthesis |
| CN102275114A (en) * | 2011-08-29 | 2011-12-14 | 机械工业第三设计研究院 | Novel spherical grinding machine tool and grinding method thereof |
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Address after: No. 100, Huing Road, Minhang District, Shanghai City, Shanghai Patentee after: Shanghai Aerospace Equipment Manufacturing Co., Ltd. Address before: No. 100, Huing Road, Minhang District, Shanghai City, Shanghai Patentee before: Shanghai Aerospace Equipment Manufacturing General Factory |