CN102500790A - Precision machining device for middle and long-distance and high-coaxiality hole - Google Patents
Precision machining device for middle and long-distance and high-coaxiality hole Download PDFInfo
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- CN102500790A CN102500790A CN2011103461769A CN201110346176A CN102500790A CN 102500790 A CN102500790 A CN 102500790A CN 2011103461769 A CN2011103461769 A CN 2011103461769A CN 201110346176 A CN201110346176 A CN 201110346176A CN 102500790 A CN102500790 A CN 102500790A
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- supporting shaft
- boring bar
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Abstract
The invention discloses a precision machining device for a middle and long-distance and high-coaxiality hole. The device is characterized in that: two supporting shaft sleeves are arranged on a boring table; an air flotation boring rod is penetrated between inner holes of the two supporting shaft sleeves; the inner holes of the two supporting shaft sleeves are kept coaxial; a compressed air membrane is used for supporting between the outer circle of the air flotation boring rod and the surfaces of the inner holes of the two supporting shaft sleeves to realize rotary motion; the extension sections of the air flotation boring rod outside the two supporting shaft sleeves are provided with a front cutting tool and a rear cutting tool for boring the hole respectively; and the top end of the extension section of the air flotation boring rod on the side, where the front cutting tool is arranged, is connected with a boring machine main shaft through a coupling. Compared with the prior art, the invention provides the precision machining device for the middle and long-distance and high-coaxiality hole; the mode of respective machining in the direction of 180 degrees of the conventional turning machine working table is changed; the error brought by different lengths of cantilevers of the boring rod is eliminated; the conventional boring process can be substituted; and the device has great practical significance.
Description
Technical field
The present invention is the Precision Machining device in a kind of middle and long distance high-axiality hole, belongs to the machine-shaping technical field.
Background technology
In the processing of some frame clsss parts, the processing of middle and long distance high-axiality hole system is the critical process of this type of part processing all the time, and traditional processing technology is as shown in Figure 1.For the bigger part of physical dimension; Because the distance between its two hole is longer; Exceeded boring machine boring bar b travel range in axial direction; If will on lathe, accomplish the boring of two stomidiums, behind the intact front aperture c of boring, then need machine tool rotary working table a be turned the boring processing of carrying out hole, rear end d after 180 °.This method is owing to machining benchmark when processing two holes has produced variation; Except that the guide rail linearity of lathe itself; Error during parts fixation; The turn error of machine tool rotary working table all impacts final processing result, therefore will realize that higher coaxial requirement receives the restriction of several factors.
Summary of the invention
The present invention designs the Precision Machining device that a kind of middle and long distance high-axiality hole is provided to the deficiency that exists in the above-mentioned prior art just; Its objective is that the machining accuracy that makes hole system is no longer dependent on the positioning accuracy of machine tool guideway precision and machine tool rotary working table; Can process the hole that the axiality index is superior to the machine tool guideway kinematic accuracy is characteristic, has improved the axiality index of middle and long distance hole system dramatically.The method has changed traditional 180 ° of directions of platen of turning and has distinguished method for processing, has eliminated the error of bringing owing to boring bar cantilever length difference, reaches the machining accuracy limit of abundant expansion lathe, the purpose that cuts down finished cost.
The objective of the invention is to realize through following technical scheme:
The Precision Machining device in this kind middle and long distance high-axiality hole; It is characterized in that: two support sleeves are installed on boring table; Pass an air supporting boring bar between the endoporus of two support sleeves; It is coaxial that the endoporus of two support sleeves keeps; Support to realize gyration through the compressed air film between the bore area of the cylindrical of air supporting boring bar and two support sleeves, the air supporting boring bar is equipped with the preceding cutter and back cutter that is used for bore hole respectively on the extension in two support sleeve outsides, and the top of the extension of cutter one side is connected with boring spindle through shaft coupling before installing on the air supporting boring bar.
The advantage of technical scheme of the present invention is:
One, this device has been broken away from the restriction of process equipment precision conditions, can further improve existing machining accuracy, solves the bottleneck problem in the processing technology, thus performance of products index under improving;
Two, using this device to process can compress the time that in the past was used for manual repair, grinding and measurement in a large number significantly, replaces the manual precision that improves with machined, has alleviated labour intensity simultaneously, has reduced uncertain factor, has improved efficient.
Description of drawings
Fig. 1 adds the structural representation of section chief apart from the device in axiality hole for prior art
Fig. 2 is the structural representation of apparatus of the present invention
Fig. 3 is the side view of apparatus of the present invention
The specific embodiment
Below will combine accompanying drawing and embodiment that technical scheme of the present invention is done to detail further:
Shown in accompanying drawing 2～3; The Precision Machining device in this kind middle and long distance high-axiality hole; It is characterized in that: two support sleeves 4 are installed on boring table 1; Pass an air supporting boring bar 2 between the endoporus of two support sleeves 4, air supporting boring bar 2 has guaranteed that the endoporus of two support sleeves 4 is coaxial, supports to realize gyration through the compressed air film between the bore area of the cylindrical of air supporting boring bar 2 and two support sleeves 4; The linear relative movement that platen 1 transmits between air supporting boring bar 2 and the workpiece through boring bar support sleeve 4; Air supporting boring bar 2 is equipped with the preceding cutter 8 and back cutter 9 that is used for bore hole respectively on the extension in two support sleeve 4 outsides, the top of the extension of cutter 8 one sides is connected with boring spindle 6 through shaft coupling 7 before installing on the air supporting boring bar 2, transmits the gyration between air supporting boring bar 2 and the workpiece.
When using this device bore hole, two support sleeves 4 of air supporting boring bar 2 are placed in the processed framework 10, support distances is big as far as possible under the prerequisite that satisfies the processing stroke, guarantees the angular stiffness of whole air supporting boring bar 2; Preceding cutter 8 can be finely tuned in the diametric(al) of air supporting boring bar 2 respectively with back cutter 9, to guarantee the absolute dimension of bore hole; Behind preceding hole 3 of boring and the metapore 5, can air supporting boring bar 2 be withdrawed from the aperture,, confirm the surplus in aperture and the size of next feed so that carry out inside diameter measurement; The support sleeve 4 bottom cushioning parallel blocks of air supporting boring bar 2 are according to high definite its gauge in the center of part bore hole.2 of machine tool chief axis 6 and air supporting boring bars transmit axial cutting forces with shaft coupling 7 and drive 2 revolutions of air supporting boring bar, and the link of this axial stiffness, radial compliance has been eliminated the influence that machine tool chief axis 6 turn errors bring; When adopting this kind method bore hole; Do not need platen to carry out 180 ° of revolutions; Part only needs a clamping; And machining benchmark does not change, and axiality that preceding hole 3 and metapore are 5 requires to lean on air supporting boring bar 2 vertically kinematic accuracy in support sleeve 4 to guarantee, has eliminated the linear influence of machine tool guideway.Because 2 of air supporting boring bars kinematic accuracy in support sleeve 4 is higher, so can significantly improve the precision indexs such as axiality and cylindricity in two holes than the traditional processing mode.
Compared with prior art; Apparatus of the present invention provide the precision machining method in a kind of middle and long distance high-axiality hole; Changed traditional mode that 180 ° of directions of platen are processed respectively of turning; Eliminated because the error that boring bar cantilever length difference is brought can replace traditional boring process, had good Practical significance.
Claims (1)
1. the Precision Machining device in a middle and long distance high-axiality hole; It is characterized in that: go up at boring table (1) two support sleeves (4) are installed; Pass an air supporting boring bar (2) between the endoporus of two support sleeves (4); Air supporting boring bar (2) has guaranteed that the endoporus of two support sleeves (4) is coaxial; Support to realize gyration through the compressed air film between the bore area of the cylindrical of air supporting boring bar (2) and two support sleeves (4); Air supporting boring bar (2) is equipped with preceding cutter (8) and the back cutter (9) that is used for bore hole respectively on the extension in two support sleeves (4) outside, the top of the extension of cutter (8) one sides was connected with boring spindle (6) through shaft coupling (7) before air supporting boring bar (2) was gone up and installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103461769A CN102500790A (en) | 2011-11-04 | 2011-11-04 | Precision machining device for middle and long-distance and high-coaxiality hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103461769A CN102500790A (en) | 2011-11-04 | 2011-11-04 | Precision machining device for middle and long-distance and high-coaxiality hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102500790A true CN102500790A (en) | 2012-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103461769A Pending CN102500790A (en) | 2011-11-04 | 2011-11-04 | Precision machining device for middle and long-distance and high-coaxiality hole |
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| CN (1) | CN102500790A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102950306A (en) * | 2012-08-03 | 2013-03-06 | 鞍钢重型机械有限责任公司 | Method and device for machining 180-degree shaft hole of large rotating workpiece |
| CN104722794B (en) * | 2014-12-17 | 2017-03-01 | 中国航空工业集团公司北京航空精密机械研究所 | A kind of precise processing device of high position degree end face |
| CN106475596A (en) * | 2016-12-09 | 2017-03-08 | 中国有色(沈阳)泵业有限公司 | Casing bore hole tool |
| CN111590121A (en) * | 2020-05-18 | 2020-08-28 | 重庆望江工业有限公司 | Milling method for long-span small hole |
| CN111702210A (en) * | 2020-06-12 | 2020-09-25 | 陕西飞机工业（集团）有限公司 | Method for drilling end face of stay bar of long-axis revolving body |
| CN115183723A (en) * | 2022-06-13 | 2022-10-14 | 中国第一汽车股份有限公司 | Method for measuring coaxiality by combining axiality |
| CN115502735A (en) * | 2022-10-21 | 2022-12-23 | 上海大学 | Excircle positioning locking clamp for horizontal numerical control machine tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102950306A (en) * | 2012-08-03 | 2013-03-06 | 鞍钢重型机械有限责任公司 | Method and device for machining 180-degree shaft hole of large rotating workpiece |
| CN102950306B (en) * | 2012-08-03 | 2015-07-15 | 鞍钢重型机械有限责任公司 | Method and device for machining 180-degree shaft hole of large rotating workpiece |
| CN104722794B (en) * | 2014-12-17 | 2017-03-01 | 中国航空工业集团公司北京航空精密机械研究所 | A kind of precise processing device of high position degree end face |
| CN106475596A (en) * | 2016-12-09 | 2017-03-08 | 中国有色(沈阳)泵业有限公司 | Casing bore hole tool |
| CN106475596B (en) * | 2016-12-09 | 2018-04-03 | 中国有色(沈阳)泵业有限公司 | Casing bore hole tool |
| CN111590121A (en) * | 2020-05-18 | 2020-08-28 | 重庆望江工业有限公司 | Milling method for long-span small hole |
| CN111590121B (en) * | 2020-05-18 | 2022-10-25 | 重庆望江工业有限公司 | Milling method for long-span small hole |
| CN111702210A (en) * | 2020-06-12 | 2020-09-25 | 陕西飞机工业（集团）有限公司 | Method for drilling end face of stay bar of long-axis revolving body |
| CN115183723A (en) * | 2022-06-13 | 2022-10-14 | 中国第一汽车股份有限公司 | Method for measuring coaxiality by combining axiality |
| CN115502735A (en) * | 2022-10-21 | 2022-12-23 | 上海大学 | Excircle positioning locking clamp for horizontal numerical control machine tool |
| CN115502735B (en) * | 2022-10-21 | 2024-06-21 | 上海大学 | Outer circle positioning and locking clamp for horizontal numerical control machine tool |
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Application publication date: 20120620 |