CN101439471A - Machine tool gas kinetic pressure center frame - Google Patents
Machine tool gas kinetic pressure center frame Download PDFInfo
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- CN101439471A CN101439471A CNA2008102339255A CN200810233925A CN101439471A CN 101439471 A CN101439471 A CN 101439471A CN A2008102339255 A CNA2008102339255 A CN A2008102339255A CN 200810233925 A CN200810233925 A CN 200810233925A CN 101439471 A CN101439471 A CN 101439471A
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- machine tool
- bearing shell
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- center support
- upper press
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Abstract
The invention relates to a gas dynamic-pressing central frame of a machine tool, which solves the problem that the rigid central frame of the existing machine tool abrades the surface of the processed workpiece. The gas movable-pressing central frame comprises an upper pressing cover and a central supporter which are correspondingly matched and fixed by screws. The gas dynamic-pressing central frame is characterized in that the internal ring surface of the upper pressing cover and the lower-concave round surface of the central supporter are provided with a bearing; the working surface of the bearing is Archimedean curved surface or eccentric arc surface. The gas dynamic-pressing central frame is not rigidly contacted with the workpiece directly, generates no abrasion on the surface of the workpiece, has extremely high bearing precision and is suitable for being used in large-batch production.
Description
Technical field
The present invention relates to a kind of machine tool accessories, exactly is the lathe centre frame.
Background technology
When turning or grinding thin and long shafts part,, often on lathe, 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 have the following disadvantages: need constantly add oil injecting lubricating to supporting-point during work owing to be rigidity contact supporting; When machining accuracy was higher, directly contact destroyed the machined surface quality of part to be processed easily; For the grinding of superhigh precision, existing centre frame seems and supports the precision deficiency.
Summary of the invention
In order to solve the weak point that the supporting of above-mentioned lathe rigid central frame exists, the invention provides the machine tool gas kinetic pressure centre frame that does not exist rigidity directly to contact between a kind of and the workpiece.
The Technological improvement plan of realizing above-mentioned purpose is as follows:
The machine tool gas kinetic pressure centre frame 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 formation to can be used for supporting the circular hole of shaft-like workpiece with the recessed semi circular surface of center support, improvement is:
The radially inner side of described center support is provided with the bearing shell more than, and the working face of described bearing shell is Archimedes's curved surface or eccentric garden arc surface.
Described upper press cover radially inner side is provided with the bearing shell more than, and the working face of described bearing shell is Archimedes's curved surface or eccentric garden arc surface.
During work, cooperate in the middle of upper press cover and center support are enclosed in the workpiece that is supported by bearing shell and form a dynamic pressure support system; Also can be only at the diastrophic dynamic pressure support bearing shell that under gravity and cutting force or grinding force effect, produces in order to the opposing workpiece that is provided with on the center support more than one or.
Be respectively equipped with the bulb adjustment screw on described upper press cover corresponding and the center support with every bearing shell; The every piece back of bearing corresponding with the bulb adjustment screw is equipped with a location ball-and-socket.
The bulb of described bulb adjustment screw is the segment shape.
The location ball-and-socket of described back of bearing is the sphere pit.
Gas dynamic pressure centre frame of the present invention adopts the gas dynamic pressure technology 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 supporting precision is very high, is adapted at using in the Precision Machining of axial workpiece.
Description of drawings
Fig. 1 is the user mode figure that has the centre frame of fixed axis tile structure among the present invention,
Fig. 2 also is simultaneously the A-A cutaway view among Fig. 1 for having the centre frame schematic diagram of fixed axis tile structure among the present invention,
Fig. 3 is the centre frame schematic diagram that has the rotatable shaft tile structure among the present invention,
Fig. 4 also is simultaneously the B-B cutaway view among Fig. 3 for having the centre frame schematic diagram of rotatable shaft tile structure among the present invention,
Fig. 5 is the user mode figure that the centre frame of lower support is only arranged among the present invention,
Fig. 6 also is simultaneously the C-C cutaway view among Fig. 5 for the schematic diagram of the centre frame of lower support is only arranged among the present invention.
In Fig. 1 and Fig. 2, upper press cover 1, bearing shell 2, workpiece 3, screw 4, positioning spigot 5, center support 6, tailstock 7, spindle chuck 8, emery wheel 9;
In Fig. 3 and Fig. 4, upper press cover 11, bearing shell 12, bulb adjustment screw 13, workpiece 14, screw 15, positioning spigot 16, center support 17, spindle chuck 18, emery wheel 19, tailstock 20;
In Fig. 5 and Fig. 6, loam cake 23, workpiece 24, bolt 25, bearing shell 26, bulb adjustment screw 27, center support 28, spindle chuck 29, emery wheel 30, tailstock 31.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is further described by embodiment.
Embodiment 1:
Referring to Fig. 1 and Fig. 2, processed workpiece 3 is a kind of air-floating main shafts, and the one end is clamped by 8 supportings of machine tool chief axis chuck, and the other end is by tailstock 7 supportings, and grinding is carried out on the surface of 9 pairs of processed workpiece 3 of emery wheel.The part of grinding is installed the gas dynamic pressure centre frame on processed workpiece 3, the machine tool gas kinetic pressure centre frame comprises by screw 4 corresponding matching fixing upper press cover 1 and center support 6, between upper press cover 1 and center support 6, be provided with positioning spigot 5, to guarantee the positional precision after both assemblings are closed up; Upper press cover 1 is a semi-annular shape, and center support 6 middle parts are recessed semi circular surface, and the interior anchor ring of upper press cover 1 cooperates circular hole of formation with the recessed semi circular surface of center support 6; Be installed with a bearing shell 2 on the anchor ring in the upper press cover 1, uniform on the recessed semi circular surface of center support 6 two bearing shells 2 be installed; The working face of bearing shell 2 is Archimedes's curved surface or garden arc surface.
In the middle of upper press cover 1 was enclosed in workpiece 3 by bearing shell 2 with center support 6, when direction shown in the workpiece Antu 2 was rotated, bearing shell cooperates with workpiece formed a dynamic pressure support system; The working face of bearing shell 2 adopts Archimedes's curved surface or eccentric garden arc surface, to guarantee forming the wedge gap of convergence between the working face of the surface of workpiece 3 and bearing shell 2 when workpiece 3 rotates by the direction of arrow shown in Figure 1; When workpiece 3 was pressed among Fig. 2 the rotation of direction shown in the arrow, air flowed in the wedge gap of convergence and produces the gas dynamic pressure effect, forms the supporting to workpiece.
Embodiment 2:
Referring to Fig. 3 and Fig. 4, in upper press cover 11 footpaths corresponding bulb adjustment screw 13 is installed upwards with the bearing shell arranged above the workpiece 12, also be separately installed with two bulb adjustment screw 13 on the corresponding center support 17 of two bearing shells arranging below with workpiece 12, the bulb of bulb adjustment screw is the segment shape; Bearing shell 12 back sides corresponding with bulb adjustment screw 13 are provided with the location ball-and-socket, and the location ball-and-socket of back of bearing is a spherical pit; And bulb adjustment screw 13 withstands on the location ball-and-socket at bearing shell 12 backs, and other structure is with embodiment 1.
Every bearing shell 12 can be respectively made minor rotation with automatic adjustment wedge gap around the bulb adjustment screw 13 at the back side separately, when workpiece 14 during by direction of arrow rotation shown in Figure 4, forms the wedge gap of restraining between the surface of workpiece 14 and every bearing shell 12 working faces; Air flows in the wedge gap of convergence and produces the Hydrodynamic effect, forms the supporting to workpiece.
Embodiment 3:
Processed workpiece is a kind of roll, when accurate grinding is carried out on its surface, in order to reduce the flexural deformation that the workpiece deadweight produces, can use a kind of the centre frame that the gas dynamic pressure supporting is set below workpiece.
Referring to Fig. 5 and Fig. 6, on the center support 28 of bearing shell 26 correspondences of workpiece arranged beneath, bulb adjustment screw 27 is installed, the bulb of bulb adjustment screw 27 is the segment shape; Bearing shell 26 back sides corresponding with bulb adjustment screw 27 are provided with the location ball-and-socket, and the location ball-and-socket at bearing shell 26 back sides is a spherical pit; And bulb adjustment screw 27 withstands on the location ball-and-socket at bearing shell 26 backs, and other structure is with embodiment 1.
Claims (4)
1, machine tool gas kinetic pressure centre frame, comprise 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 formation to can be used for supporting the circular hole of shaft-like workpiece with the recessed semi circular surface of center support, it is characterized in that:
The radially inner side of described center support is provided with the bearing shell more than, and the working face of described bearing shell is Archimedes's curved surface or eccentric garden arc surface.
2, machine tool gas kinetic pressure centre frame according to claim 1 is characterized in that: described upper press cover radially inner side is provided with the bearing shell more than, and the working face of described bearing shell is Archimedes's curved surface or eccentric garden arc surface.
3, machine tool gas kinetic pressure centre frame according to claim 1 and 2 is characterized in that: be respectively equipped with the bulb adjustment screw on described upper press cover corresponding with every bearing shell or the center support; The every piece back of bearing corresponding with the bulb adjustment screw is equipped with a location ball-and-socket.
4, machine tool gas kinetic pressure centre frame according to claim 3 is characterized in that: the location ball-and-socket of described back of bearing is the sphere pit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102339255A CN101439471A (en) | 2008-12-17 | 2008-12-17 | Machine tool gas kinetic pressure center frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102339255A CN101439471A (en) | 2008-12-17 | 2008-12-17 | Machine tool gas kinetic pressure center frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101439471A true CN101439471A (en) | 2009-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102339255A Pending CN101439471A (en) | 2008-12-17 | 2008-12-17 | Machine tool gas kinetic pressure center frame |
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| CN (1) | CN101439471A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102000992A (en) * | 2010-11-19 | 2011-04-06 | 天津机辆轨道交通装备有限责任公司 | Bracket for turning elongated conical rod shaft |
| CN102343533A (en) * | 2011-10-19 | 2012-02-08 | 常州富兴机电有限公司 | Adjustable device for grinding and centering rotor with thin long shaft |
| CN102848271A (en) * | 2012-08-20 | 2013-01-02 | 吴江市三达五金工具厂 | Material grinder |
| CN108436729A (en) * | 2018-03-28 | 2018-08-24 | 安徽理工大学 | A kind of axial workpiece semi-automatic polishing device |
| CN114367803A (en) * | 2021-12-21 | 2022-04-19 | 扬州华通橡塑有限公司 | Hydraulic damper rubber node press fitting equipment for rail transit vehicle |
| CN115106550A (en) * | 2022-06-25 | 2022-09-27 | 广东韶钢工程技术有限公司 | Universal device for slender shaft and using method |
-
2008
- 2008-12-17 CN CNA2008102339255A patent/CN101439471A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102000992A (en) * | 2010-11-19 | 2011-04-06 | 天津机辆轨道交通装备有限责任公司 | Bracket for turning elongated conical rod shaft |
| CN102343533A (en) * | 2011-10-19 | 2012-02-08 | 常州富兴机电有限公司 | Adjustable device for grinding and centering rotor with thin long shaft |
| CN102848271A (en) * | 2012-08-20 | 2013-01-02 | 吴江市三达五金工具厂 | Material grinder |
| CN108436729A (en) * | 2018-03-28 | 2018-08-24 | 安徽理工大学 | A kind of axial workpiece semi-automatic polishing device |
| CN114367803A (en) * | 2021-12-21 | 2022-04-19 | 扬州华通橡塑有限公司 | Hydraulic damper rubber node press fitting equipment for rail transit vehicle |
| CN115106550A (en) * | 2022-06-25 | 2022-09-27 | 广东韶钢工程技术有限公司 | Universal device for slender shaft and using method |
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Open date: 20090527 |