CN101428393A - Machine tool fluid pressure center frame - Google Patents
Machine tool fluid pressure center frame Download PDFInfo
- Publication number
- CN101428393A CN101428393A CNA2008102339221A CN200810233922A CN101428393A CN 101428393 A CN101428393 A CN 101428393A CN A2008102339221 A CNA2008102339221 A CN A2008102339221A CN 200810233922 A CN200810233922 A CN 200810233922A CN 101428393 A CN101428393 A CN 101428393A
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- pressure tank
- arc
- central support
- upper press
- oil groove
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Abstract
The invention relates to a liquid static pressure central support of a machine tool for processing shaft-type parts, which solves the problem that the bearing precision in the precision machining of the shaft-type parts is insufficient. The central support is characterized in that a lower bearing bush is arranged on the central support, an upper bearing bush is arranged on the inner lateral surface of an upper gland in the radial direction, bearing grooves are formed on the working planes of the upper bearing bush and the lower bearing bush, and an oil returning groove is formed between adjacent bearing grooves; arc oil grooves are formed on the back of the upper bearing bush and the lower bearing bush; orifices are formed on the bearing grooves, and the orifices are communicated with the bearing grooves and the arc oil grooves; a lower oil inlet is formed on the central support; upper semi-end covers are arranged on both lateral surfaces of the upper gland in the axial direction respectively, and lower semi-end-covers are arranged on both lateral surfaces of the lower concave semicircular surface of the central support in the axial direction respectively. The liquid static pressure central support adopts the liquid static pressure technology to directly support work pieces, and the rigid direct contact does not exist between the central support and the work pieces; therefore, the invention has the following advantages: the abrasion is not generated on the surface of the work pieces, the vibration of the work pieces supported can be absorbed and refrained, the bearing precision is higher, and the liquid static pressure central support is suitable for the precision machining of the shaft-type parts.
Description
Technical field
The present invention relates to a kind of Machining of Shaft-type Parts lathe centre frame or follow-rest.
Background technology
When turning or grinding slender axles,, often adopt centre frame or follow-rest that processed part is carried out aiding support in order to reduce the flexural deformation that part to be processed produces under gravity or cutting force effect.Existing centre frame or follow-rest are a kind of non-yielding props to the supporting of part to be processed, centre frame or follow-rest directly contact at the strong point with part to be processed, as 3 contact centre frames that have roller commonly used, the roller of centre frame directly withstands on the piece surface that is supported.Existing centre frame or follow-rest are owing to be rigidity contact supporting, and have the following disadvantages: the ability that absorbs Workpiece vibration is relatively poor, even produces the extraneous vibration of workpiece, and is especially more obvious when workpiece rotational frequency is higher; Need constantly add oil injecting lubricating to supporting-point during work; When machining accuracy was higher, directly contact destroyed the machined surface quality easily; The supporting precision is not enough in the Precision Machining of some axial workpiece (as air-floating main shaft).
Summary of the invention
For the not enough problem of supporting precision in the Precision Machining that solves axial workpiece (as air-floating main shaft), the invention provides a kind of machine tool fluid pressure centre frame.
Concrete art designs scheme is as follows:
Machine tool fluid pressure centre frame of the present invention comprises by screw corresponding matching fixing upper press cover and center support, upper press cover is a semi-annular shape, the center support middle part is recessed semi circular surface, the interior anchor ring of upper press cover cooperates a formation axle class workpiece hole with the recessed semi circular surface of center support, it is characterized in that:
The recessed semi circular surface of described center support is provided with lower bearing, and the working face of lower bearing is provided with the pressure tank of one or more, is provided with oil-recovery tank between the adjacent pressure tank; The back side of lower bearing is provided with the arc oil groove that cross section is an arc; The centre of every pressure tank is provided with throttle orifice, and throttle orifice one end is connected with pressure tank, and the other end is connected with the arc oil groove; Be provided with down fuel feed hole with the corresponding center support of arc oil groove;
The axial two sides of described upper press cover are respectively equipped with first end cap, and the axial two sides of recessed semi circular surface of described center support are respectively equipped with second end cap,
Be respectively equipped with oil return opening on second end cap of described both sides.
Be respectively equipped with sealing ring on described first end cap and second end cap.
The radially inner side face of described upper press cover is provided with top bearing shell, and the working face of top bearing shell is provided with the pressure tank of one or more, is provided with oil-recovery tank between the adjacent pressure tank; The back side of top bearing shell is provided with the arc oil groove that cross section is an arc; The centre of every pressure tank is provided with throttle orifice, and throttle orifice one end is connected with pressure tank, and the other end is connected with the arc oil groove; The upper press cover corresponding with the arc oil groove is provided with fuel feed hole.
Referring to Fig. 1, according to inner surface of bearing bush arc radius about the radius size design of the workpiece 13 that is supported, make inner surface of bearing bush arc radius up and down be slightly larger than the radius of the workpiece that is supported, after upper and lower bearing shell closes up, can form the gap of suitable size between bearing shell and the workpiece that is supported; The pressure oil of the constant pressure that outside oil supply system is supplied with by throttle orifice to the pressure tank fuel feeding, and the gap outflow between the surface of the bearing shell surface around the pressure tank and the axle that is supported.In this process, the outside pressure oil of supplying with is reduced to pressure tank pressure from charge oil pressure after by flow controller, again through the surface of the bearing shell around the pressure tank be supported spool the surface between the gap reduce to environmental pressure from oil pocket pressure.When the axle that is supported is subjected to the external force effect and when producing flexural deformation, corresponding the changing of oil extraction gap meeting around each pressure tank, on the bending direction of axle, oil extraction gap smaller around the pressure tank, oil pressure raises in the pressure tank thereby make, the power of liquid effects in the pressure tank on axle becomes big, and the result makes the flexural deformation of axle reduce; And on crooked rightabout, it is big that the oil extraction gap around the pressure tank becomes, and oil pressure reduces in the pressure tank, and the power of liquid effects on axle in the pressure tank diminishes, and the result makes that also the distortion of axle reduces.Therefore, the fluid pressure centre frame acts on makes a concerted effort that the flexural deformation direction with bearing is opposite all the time on the axle that is supported, and can reduce the flexural deformation of axle automatically.
The present invention's advantage compared with prior art:
The fluid pressure centre frame adopts Liquid Static-Press Technique directly workpiece to be supported, do not exist the direct of rigidity to contact between centre frame and the workpiece, therefore following advantage is arranged: to not wearing and tearing of surface of the work, the vibration of the workpiece that can absorb and suppress to be supported, the supporting precision is higher, is adapted at using in the Precision Machining of axial workpiece.
Description of drawings
Fig. 1 is a structural representation of the present invention,
Fig. 2 is the A-A cutaway view of Fig. 1,
Fig. 3 is the structural representation that only has lower bearing,
Fig. 4 is the B-B cutaway view of Fig. 3.
In Fig. 1 and Fig. 2, lower bearing 1, positioning spigot 2, bolt 3, upper press cover 4, top bearing shell 5, last fuel feed hole 6, oil-recovery tank 7, pressure tank 8, throttle orifice 9, arc oil groove 10, center support 11, following fuel feed hole 12, workpiece 13, first sealing ring 14, first end cap 15, emery wheel 16, tailstock supporting 17, second end cap 18, spill port 19, second sealing ring 20, machine tool chief axis chuck 21;
In Fig. 3 and Fig. 4, lower bearing 1a, bolt 3a, upper press cover 4a, oil-recovery tank 7a, pressure tank 8a, throttle orifice 9a, arc oil groove 10a, centre frame body 11a, following fuel feed hole 12a, workpiece 13a, first sealing ring 14a, first end cap 15a, emery wheel 16a, tailstock supporting 17a, second end cap 18a, spill port 19a, second sealing ring 20a, machine tool chief axis chuck 21a.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is further described by embodiment.
Embodiment 1:
Processed workpiece is certain accurate main shaft, and draw ratio is bigger, cylindrical machining accuracy height, and production lot is big.
Referring to Fig. 1 and Fig. 2, processed workpiece 13 1 ends are clamped by 21 supportings of machine tool chief axis chuck, and the other end is by tailstock supporting 17 supportings, and the middle part surface of 16 pairs of processed workpiece 13 of emery wheel carries out grinding.The part of grinding is installed the fluid pressure centre frame on processed workpiece 13, this machine tool fluid pressure centre frame comprises by bolt 3 corresponding matching fixing upper press cover 4 and center support 11, this centre frame top bearing shell 5 connects firmly on the radially inner side face of upper press cover 4, lower bearing 1 connects firmly on the recessed semi circular surface of center support 11, top bearing shell 5 is provided with positioning spigot 2 with lower bearing 1, and the effect of positioning spigot 2 is that the mutual alignment was accurate after the upper and lower bearing shell of assurance closed up.
The working face of lower bearing 1 is provided with two pressure tanks 8, is provided with oil-recovery tank 7 between the adjacent pressure tank 8; The back side of lower bearing 1 is provided with the arc oil groove 10 that cross section is an arc; The centre of every pressure tank 8 is provided with throttle orifice 9, and throttle orifice 9 one ends are connected with pressure tank 8, and the other end is connected with arc oil groove 10; Be provided with down fuel feed hole 12 with arc oil groove 10 corresponding center supports 11;
The working face of top bearing shell 5 is provided with two pressure tanks 8, is provided with oil-recovery tank 7 between the adjacent pressure tank 8; The back side of top bearing shell 5 is provided with the arc oil groove 10 that cross section is an arc; The centre of every pressure tank 8 is provided with throttle orifice 9, and throttle orifice 9 one ends are connected with pressure tank 8, and the other end is connected with arc oil groove 10; The upper press cover 4 corresponding with arc oil groove 10 is provided with fuel feed hole 6.
Two first end caps 15 are installed in the left and right sides of upper press cover 4 respectively, and first sealing ring 14 is installed in first end cap 15, and two second end caps 18 are installed in the left and right sides of centre frame body 11 respectively, and second sealing ring 20 is installed in second end cap 18; The footpath of lower bearing 1 upwards is provided with two throttle orifices 9, and the footpath of top bearing shell 5 upwards is provided with two throttle orifices 9; Hydraulic oil enters pressure tank 8 by last fuel feed hole 6 and following fuel feed hole 12 through arc oil groove 10 and throttle orifice 9 respectively, and the pressure oil in the pressure tank 8 flows out through its peripheral slit, reclaims through spill port 19.
Embodiment 2
Processed workpiece is certain roll, and draw ratio is bigger, and weight is bigger, and the cylindrical requirement on machining accuracy is higher.Because workpiece weight is bigger, the flexural deformation that deadweight causes is to influence accuracy factors in the fine finishining process.For easy to use, adopting only has the static pressure centre frame of below supporting that workpiece is supported, with the flexural deformation that reduces to cause because of deadweight in the fine finishining process.
Referring to Fig. 3 and Fig. 4, processed workpiece 13a one end is clamped by machine tool chief axis chuck 21a supporting, and the other end is by tailstock supporting 17a supporting, and emery wheel 16a carries out grinding to the surface of processed workpiece 13a.The part of grinding is installed the fluid pressure centre frame on processed workpiece 13a, this centre frame only has a lower bearing 1a to connect firmly on the recessed semi circular surface of center support 11a, two first end cap 15a are installed in the left and right sides of upper press cover 4a respectively, first sealing ring 14a is installed among first end cap 15a, two second end cap 18a are installed in the left and right sides of centre frame body 11a respectively, second sealing ring 20a is installed among second end cap 18a, hydraulic oil enters pressure tank 8a by following fuel feed hole 12a through arc oil groove 10a and throttle orifice 9a, pressure oil among the pressure tank 8a flows out through its peripheral slit, reclaims through spill port 19a.
Claims (3)
1, machine tool fluid pressure centre frame, comprise that upper press cover is a semi-annular shape by screw corresponding matching fixing upper press cover and center support, the center support middle part is recessed semi circular surface, the interior anchor ring of upper press cover cooperates a formation axle class workpiece hole with the recessed semi circular surface of center support, it is characterized in that:
The recessed semi circular surface of described center support is provided with lower bearing, and the working face of lower bearing is provided with the pressure tank of one or more, is provided with oil-recovery tank between the adjacent pressure tank; The back side of lower bearing is provided with the arc oil groove that cross section is an arc; The centre of every pressure tank is provided with throttle orifice, and throttle orifice one end is connected with pressure tank, and the other end is connected with the arc oil groove; Be provided with down fuel feed hole with the corresponding center support of arc oil groove;
The axial two sides of described upper press cover are respectively equipped with first end cap, and the axial two sides of recessed semi circular surface of described center support are respectively equipped with second end cap,
Be respectively equipped with oil return opening on second end cap of described both sides.
2, machine tool fluid pressure centre frame according to claim 1 is characterized in that: the radially inner side face of described upper press cover is provided with top bearing shell, and the working face of top bearing shell is provided with the pressure tank of one or more, is provided with oil-recovery tank between the adjacent pressure tank; The back side of top bearing shell is provided with the arc oil groove that cross section is an arc; The centre of every pressure tank is provided with throttle orifice, and throttle orifice one end is connected with pressure tank, and the other end is connected with the arc oil groove; The upper press cover corresponding with the arc oil groove is provided with fuel feed hole.
3, machine tool fluid pressure centre frame according to claim 1 is characterized in that: be respectively equipped with sealing ring on described first end cap and second end cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810233922A CN100574980C (en) | 2008-12-17 | 2008-12-17 | The machine tool fluid pressure centre frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810233922A CN100574980C (en) | 2008-12-17 | 2008-12-17 | The machine tool fluid pressure centre frame |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101428393A true CN101428393A (en) | 2009-05-13 |
| CN100574980C CN100574980C (en) | 2009-12-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN200810233922A Expired - Fee Related CN100574980C (en) | 2008-12-17 | 2008-12-17 | The machine tool fluid pressure centre frame |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102275104A (en) * | 2010-06-08 | 2011-12-14 | 昆山华辰机器制造有限公司 | Static pressure central frame of heavy-duty mill roll |
| CN102371537A (en) * | 2011-10-12 | 2012-03-14 | 潘旭华 | Crankshaft clamping method used in follow-up grinding of crankshaft rod journal |
| CN102773771A (en) * | 2012-07-26 | 2012-11-14 | 齐齐哈尔齐一机工业产品有限公司 | Large-tonnage, large-diameter and high-precision cylinder processing machine tool |
| CN102861930A (en) * | 2012-10-18 | 2013-01-09 | 南京农业大学灌云现代农业装备研究院 | Damping device |
| CN103009075A (en) * | 2012-12-25 | 2013-04-03 | 中国核动力研究设计院 | Damping follow rest for turning slender axle |
| CN103209804A (en) * | 2010-09-24 | 2013-07-17 | 斯达拉格股份公司 | Method and device for machining elongate workpieces that are not rotationally symmetrical in the form of turbine blades |
| CN104708018A (en) * | 2013-12-12 | 2015-06-17 | 铜陵市永生机电制造有限责任公司 | Device for smoothly turning off stubbles |
| CN106640966A (en) * | 2017-02-17 | 2017-05-10 | 燕山大学 | Magnetic fluid double suspension driving and driven radial bearing |
| CN106969033A (en) * | 2017-04-21 | 2017-07-21 | 燕山大学 | A kind of journal bearing of the dual suspension of electromagnetism static pressure |
| CN107097152A (en) * | 2017-05-05 | 2017-08-29 | 固耐重工（苏州）有限公司 | A kind of static-pressure central frame |
| CN107598769A (en) * | 2017-09-01 | 2018-01-19 | 宁波锴立精密轴承有限公司 | A kind of gear shape bearing outer ring polishing fixture for processing device |
| CN107953147A (en) * | 2017-11-06 | 2018-04-24 | 天津重型装备工程研究有限公司 | A kind of Mill precise grinding process |
| CN108436729A (en) * | 2018-03-28 | 2018-08-24 | 安徽理工大学 | A kind of axial workpiece semi-automatic polishing device |
| CN108581659A (en) * | 2018-04-24 | 2018-09-28 | 张雪媚 | A kind of new and effective metallic conduit outer wall polishing derusting device |
| CN114905313A (en) * | 2022-04-25 | 2022-08-16 | 山东大学 | Active-passive composite self-adaptive static pressure supporting device for precise machining of rod barrel |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU755493A1 (en) * | 1978-12-18 | 1980-08-25 | Kramatorsk Z Tyazhelogo | Hydrostatic rest |
| DE10315006B3 (en) * | 2003-04-02 | 2004-08-19 | Wfl Millturn Technologies Gmbh & Co. Kg | Workpiece support device for machine tool e.g. for supporting engine crankshaft in milling machine |
| CN200963684Y (en) * | 2006-11-13 | 2007-10-24 | 齐重数控装备股份有限公司 | Center fine tuning mechanism for static pressure center frame |
| CN201009092Y (en) * | 2007-04-06 | 2008-01-23 | 齐重数控装备股份有限公司 | Machine tool center frame with self-compensation device |
| CN101274408A (en) * | 2008-05-13 | 2008-10-01 | 潘旭华 | Center frame for machining shaft |
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2008
- 2008-12-17 CN CN200810233922A patent/CN100574980C/en not_active Expired - Fee Related
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102275104A (en) * | 2010-06-08 | 2011-12-14 | 昆山华辰机器制造有限公司 | Static pressure central frame of heavy-duty mill roll |
| CN102275104B (en) * | 2010-06-08 | 2013-05-01 | 昆山华辰机器制造有限公司 | Static pressure central frame of heavy-duty mill roll |
| CN103209804A (en) * | 2010-09-24 | 2013-07-17 | 斯达拉格股份公司 | Method and device for machining elongate workpieces that are not rotationally symmetrical in the form of turbine blades |
| CN103209804B (en) * | 2010-09-24 | 2015-07-08 | 斯达拉格股份公司 | Method and device for machining elongate workpieces that are not rotationally symmetrical in the form of turbine blades |
| CN102371537A (en) * | 2011-10-12 | 2012-03-14 | 潘旭华 | Crankshaft clamping method used in follow-up grinding of crankshaft rod journal |
| CN102773771A (en) * | 2012-07-26 | 2012-11-14 | 齐齐哈尔齐一机工业产品有限公司 | Large-tonnage, large-diameter and high-precision cylinder processing machine tool |
| CN102861930A (en) * | 2012-10-18 | 2013-01-09 | 南京农业大学灌云现代农业装备研究院 | Damping device |
| CN103009075A (en) * | 2012-12-25 | 2013-04-03 | 中国核动力研究设计院 | Damping follow rest for turning slender axle |
| CN103009075B (en) * | 2012-12-25 | 2015-04-22 | 中国核动力研究设计院 | Damping follow rest for turning slender axle |
| CN104708018A (en) * | 2013-12-12 | 2015-06-17 | 铜陵市永生机电制造有限责任公司 | Device for smoothly turning off stubbles |
| CN106640966A (en) * | 2017-02-17 | 2017-05-10 | 燕山大学 | Magnetic fluid double suspension driving and driven radial bearing |
| CN106640966B (en) * | 2017-02-17 | 2019-03-22 | 燕山大学 | A kind of passive transverse bearing of magnetic liquid dual suspension master |
| CN106969033A (en) * | 2017-04-21 | 2017-07-21 | 燕山大学 | A kind of journal bearing of the dual suspension of electromagnetism static pressure |
| CN106969033B (en) * | 2017-04-21 | 2019-02-22 | 燕山大学 | A kind of transverse bearing of the dual suspension of electromagnetism-static pressure |
| CN107097152A (en) * | 2017-05-05 | 2017-08-29 | 固耐重工（苏州）有限公司 | A kind of static-pressure central frame |
| CN107598769A (en) * | 2017-09-01 | 2018-01-19 | 宁波锴立精密轴承有限公司 | A kind of gear shape bearing outer ring polishing fixture for processing device |
| CN107953147A (en) * | 2017-11-06 | 2018-04-24 | 天津重型装备工程研究有限公司 | A kind of Mill precise grinding process |
| CN107953147B (en) * | 2017-11-06 | 2019-04-23 | 天津重型装备工程研究有限公司 | A kind of Mill precise grinding process |
| CN108436729A (en) * | 2018-03-28 | 2018-08-24 | 安徽理工大学 | A kind of axial workpiece semi-automatic polishing device |
| CN108581659A (en) * | 2018-04-24 | 2018-09-28 | 张雪媚 | A kind of new and effective metallic conduit outer wall polishing derusting device |
| CN114905313A (en) * | 2022-04-25 | 2022-08-16 | 山东大学 | Active-passive composite self-adaptive static pressure supporting device for precise machining of rod barrel |
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| CN100574980C (en) | 2009-12-30 |
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