CN103447558A - Floating boring tool for machining of blind-hole thin-walled deep-hole parts - Google Patents
Floating boring tool for machining of blind-hole thin-walled deep-hole parts Download PDFInfo
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- CN103447558A CN103447558A CN2012101799027A CN201210179902A CN103447558A CN 103447558 A CN103447558 A CN 103447558A CN 2012101799027 A CN2012101799027 A CN 2012101799027A CN 201210179902 A CN201210179902 A CN 201210179902A CN 103447558 A CN103447558 A CN 103447558A
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Abstract
The invention provides a floating boring tool for machining of blind-hole thin-walled deep-hole parts. The floating boring tool comprises a floating boring tool bar, a floating boring tool blade, and a screw. The floating boring tool blade is provided with a through hole. The floating boring tool blade is mounted on the floating boring tool bar through the screw in the through hole. A floating clearance forms between the through hole and the screw. The cylindrical surface of the floating boring tool bar is provided with an oil channel used for mounting a coolant pipe. The floating boring tool has the advantages that the technology and principle of floating boring is utilized flexibly, products are more manufacturable, machining quality of parts is stabilized, and productivity is improved.
Description
Technical field
The present invention relates to a kind of part topping machanism, especially a kind of topping machanism that also can once complete endoporus and bottom surface processing for processing blind hole shape thin wall and deep hole part, particularly, relate to the floating boring tool of processing blind hole shape thin wall and deep hole part.
Background technology
Lid is the class major part in China a new generation fairing of launch vehicle upper spring thrust mechanism, as Fig. 1, and required large stroke, high thrust when applying to radome fairing and opening, its structure length overlength.For rocket radome fairing in flight course, can correctly separate most important.Such part adopts the 7A09T6 material, and modular design size overall length reaches 511mm most, internal diameter size
(technological requirement) * 5, M70 * 15-6H with
axiality 0.1, external diameter φ 66 * 466, and
with perpendicularity requirement 0.05 and the R2 of baseplane, be connected, primary structure wall thickness 3mm, so the processing of the processing of part, particularly baseplane is very difficult.
Lid hole processing is compared with cylindrical and end face processing, and internal bore boring easily produces various faults, and in process, cutting edge is in inside, hole, naked eyes can't be observed, again because hole depth and diameter ratio L/d > 8, bring inconvenience to the operator, unfavorable factor is particularly outstanding.
The deep hole boring main difficulty is by flutter and the bad machined surface quality that causes of chip removal descends and the cutter tipping, fracture etc.Wherein flutter is chief reason.The generation of flutter is excessive because of cutter extension elongation and knife bar diameter ratio, cutter rigidity deficiency.Common boring is by a cutting edge cutting, and so-called single-point cutting, therefore, be subject to the impact of flexing and twisting property fairly obvious, very easily brings out flutter.Conventional inner diameter turning size
the time, selected the self-control knife bar of φ 28 * 800, it is 515mm that actual installation is effectively stretched out processing length, and the balancing weight of 5Kg is installed at the knife bar end, by increasing weight and the force balance point of knife bar and lathe cutter saddle system, with maximum possible, prevent the flutter that knife bar produces in cutting, but find that through cutting chatter phenomenon does not obviously improve: hole in piece part baseplane size is larger, single face 18mm, be again that R2 intersects, and cutting resistance obviously increases; Part is grown and is the blind hole shape, causes the poor rigidity of knife bar, and work in-process produces stronger flutter, and obvious spiral lamination appears in piece surface; The part wall is thin, and the Tool in Cutting resistance increases, and its cutter produces cutter relieving in aperture import department moment, and the size utmost point is not easy to control; The part working angles is long, produces heat, forms tapering and distortion.Therefore, the dimensional accuracy of part and surface roughness are difficult to guarantee, make processing become very difficult.
Can whether internal diameter size and baseplane processing maybe reach specification requirement smoothly, will directly affect the follow-up whole assembly quality of product.Because this part material is 7A09T6, very easily distortion, and be blind hole shape thin wall and deep hole part, and dimensional accuracy and surface roughness requirement are high, processes very difficultly, affected to a certain extent the research plan of product.
Therefore be necessary a set of topping machanism for the processing of blind hole shape thin wall and deep hole accessory turning of Development and design.By analyzing the technological difficulties of its processing, design effective floating boring tool, thereby in the situation that lack the deep hole machining special equipment, adopt the floating boring method to solve the knife bar flutter that part easily produces in turning process, the unfavorable factors such as tapering that deep hole end face and deep hole produce, obtain practicable working process parameter.
Summary of the invention
For defect of the prior art, the purpose of this invention is to provide a kind of floating boring tool of processing blind hole shape thin wall and deep hole part.
According to an aspect of the present invention, a kind of floating boring tool of processing blind hole shape thin wall and deep hole part is provided, comprise floating boring tool bar, floating boring tool sheet and screw, wherein, described floating boring tool sheet is provided with through hole, and described screw is positioned at described through hole described floating boring tool sheet is installed on to described floating boring tool bar, between described through hole and described screw, forms flying height, the cylinder of described floating boring tool bar is provided with oil groove, and described oil groove is for installing coolant pipe.The tank structure of floating boring tool roofbolt face, make coolant pipe in whole workpiece Boring Process follow all the time the floating boring tool bar, and cooling fluid is abundant cooling cutter cutting portion position all the time, reaches fully cooling effect.The screw of the top slot center M4 of floating boring tool sheet and floating boring tool bar is connected by screw, and makes boring complete the floating boring tool sheet and follows the convenient and safe blind hole shape thin wall and deep hole part that shifts out of floating boring tool bar, does not destroy the bore area quality.
Preferably, the cutting edge that described floating boring tool sheet comprises the boring endoporus and the cutting edge of boring bottom surface, the cutting edge smooth transition of the cutting edge of described boring endoporus and boring bottom surface is connected.Meeting endoporus, bottom surface, root R processes at one time.
Preferably, the cutting edge of boring endoporus is provided with 15 ° of inclined-planes in the cutting width direction.
Preferably, the cutting edge of boring bottom surface leaves place's groove in the middle of two bottom surface, place cutting edges, is provided with through hole in the middle of groove.
Preferably, the width of groove is less than aperture, part bottom surface.
Preferably, before the cutting edge of floating boring tool sheet, edged surface is globoidal structure.Make cutting edge sharp, and keep chip removal unobstructed.
Preferably, the cutting edge anterior angle is designed to 10 °, and relief angle is 15 °.
Boring cutter system after the improvement floating boring new application of applying in a flexible way, improved the processing technology of product greatly, stablized the part crudy and enhanced productivity.
The accompanying drawing explanation
The structural representation that Fig. 1 is typical part;
Fig. 2 is the structural representation of traditional floating boring tool sheet before improving;
Fig. 3 is the structural representation of traditional floating boring tool bar before improving;
Fig. 4 is the structural representation according to floating boring tool sheet after improvement provided by the invention;
Fig. 5 is the structural representation according to floating boring tool bar after improvement provided by the invention;
Fig. 6 is the structural representation according to the boring cutter system after improvement provided by the invention.
The specific embodiment
The defect of traditional floating boring tool is described in conjunction with Fig. 2 and Fig. 3.As Fig. 2, Fig. 3 tradition floating boring tool is adding man-hour, embedding has on the knife bar of rectangular opening, cutter hub can radially move freely in the square hole of knife bar, in working angles, the cutter hub self-centering, the cutting force produced by the cutting edge on both sides comes its position of balance, eliminate the knife bar vibration and can compensate the caused impact of machine tool chief axis deviation, make dimensionally stable, efficiency improves, and guarantees surface roughness.But during general floating boring tool cutting, the blade clamping is 5～8mm after the knife rod head end face, be mainly used in processing through hole or less stepped hole, if by traditionally shaped floating boring tool cutting, knife bar first touches the hole bottom face, at the bottom of making hole, can't process, the endoporus length dimension can't guarantee, due to hole depth, the cooling for cut problem is not resolved yet, the thin-walled parts distortion that heat in metal cutting causes can not effectively be controlled, and therefore need be redesigned traditional floating boring tool structure and blade physical dimension.
The present invention improves traditional floating boring tool.Because this part contains blind hole shape deep hole, during cutting, cutter contacts with the hole bottom face, keep again cutting edge sharp, require can make again floating blade exit smoothly after processing simultaneously, therefore the present invention has designed a kind of practicable new floating boring tool that meets this part processing request on the basis of traditional floating boring tool, and its tool dimension, geometric angle and knife bar shape are as shown in Figure 4, Figure 5.Floating boring tool after improvement comprises floating boring tool bar 1, floating boring tool sheet 2, screw 3.As shown in Figure 5, open the screw of the groove ，Cao center M4 processed of dark 11mm, wide 11.5mm at the top of floating boring tool bar 1, and drive the oil groove of wide 6mm at the cylinder of floating boring tool bar 1.As shown in Figure 4,2 designs of floating boring tool sheet are containing two kinds of cutting edges, and a kind of is the cutting edge of boring endoporus, on 15 ° of inclined-planes of cutting width direction design, for reducing cutting width, reach the effect that reduces cutting force.A kind of is the cutting edge of boring bottom surface, in the middle of two bottom surface, place cutting edges, opens a dark 3mm in place, the wide groove that is slightly less than aperture, part bottom surface, system in the middle of groove
through hole.The cutting edge anterior angle is designed to 10 °, and relief angle is 15 °, and on 10 ° of faces of anterior angle, the design cambered surface makes cutting edge sharp, and keeps chip removal unobstructed.Two kinds of cutting edges connect two kinds of cutting edge smooth transition by R2.
Floating boring tool bar 1 is installed on tail stock, and floating boring tool sheet 2 is installed on floating boring tool bar 1 by screw 3, on floating boring tool sheet 2
through hole and M4 screw 3 form and meet the flying height that cutting requires.After improving, floating boring tool bar 1 is owing to having oil groove on cylinder, and part adds installs oil pipe man-hour on oil groove, and oil pipe and floating boring tool bar synchronizing moving in the part process guarantee that cooling fluid all the time can abundant cooling cutting edge.During the boring endoporus, the cambered surface design before the endoporus cutting edge on edged surface makes cutting edge sharp, and forms the sheet smear metal that is easy to chip removal, keeps chip removal unobstructed.2 liang of floating boring tool sheets are located dark 3mm in the middle of the cutting edge of bottom surface, the wide groove that is slightly less than aperture, part bottom surface, make the boring cutter system arrive and be cut the complete boring in ，Bing Jiang bottom surface, bottom surface smoothly.Floating boring tool sheet 2, when meeting the cutting endoporus, arrives the endoporus bottom, by bottom cutting edge and two kinds of cutting edge transition R, is carried out the boring of bottom surface and is formed bottom surface root R.Boring completes, and by screw 3, floating boring tool sheet 2 is followed to floating boring tool bar 1 and shifts out workpiece.
Claims (7)
1. the floating boring tool of a processing blind hole shape thin wall and deep hole part, it is characterized in that, comprise floating boring tool bar (1), floating boring tool sheet (2) and screw (3), wherein, described floating boring tool sheet (2) is provided with through hole, described screw (3) is positioned at described through hole described floating boring tool sheet (2) is installed on to described floating boring tool bar (1), form flying height between described through hole and described screw (3), the cylinder of described floating boring tool bar (1) is provided with oil groove, and described oil groove is for installing coolant pipe.
2. the floating boring tool of processing blind hole shape thin wall and deep hole part according to claim 1, it is characterized in that, the cutting edge that described floating boring tool sheet comprises the boring endoporus and the cutting edge of boring bottom surface, the cutting edge smooth transition of the cutting edge of described boring endoporus and boring bottom surface is connected.
3. the floating boring tool of processing blind hole shape thin wall and deep hole part according to claim 2, is characterized in that, the cutting edge of boring endoporus is provided with 15 ° of inclined-planes in the cutting width direction.
4. the floating boring tool of processing blind hole shape thin wall and deep hole part according to claim 2, is characterized in that, the cutting edge of boring bottom surface leaves place's groove in the middle of two bottom surface, place cutting edges, is provided with through hole in the middle of groove.
5. the floating boring tool of processing blind hole shape thin wall and deep hole part according to claim 4, is characterized in that, the width of groove is less than aperture, part bottom surface.
6. the floating boring tool of processing blind hole shape thin wall and deep hole part according to claim 1, is characterized in that, before the cutting edge of floating boring tool sheet, edged surface is globoidal structure.
7. the floating boring tool of processing blind hole shape thin wall and deep hole part according to claim 6, is characterized in that, the cutting edge anterior angle is designed to 10 °, and relief angle is 15 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210179902.7A CN103447558B (en) | 2012-06-01 | 2012-06-01 | The floating boring tool of processing blind hole shape thin wall and deep hole part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210179902.7A CN103447558B (en) | 2012-06-01 | 2012-06-01 | The floating boring tool of processing blind hole shape thin wall and deep hole part |
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| Publication Number | Publication Date |
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| CN103447558A true CN103447558A (en) | 2013-12-18 |
| CN103447558B CN103447558B (en) | 2018-08-03 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103934487A (en) * | 2014-04-23 | 2014-07-23 | 哈尔滨汽轮机厂有限责任公司 | Boring tool used for machining deep holes of turbine sleeves and deep hole machining method |
| CN104190965A (en) * | 2014-07-30 | 2014-12-10 | 常州西利合金工具有限公司 | High-precision through hole reaming tool |
| CN105171001A (en) * | 2015-09-22 | 2015-12-23 | 武汉重工铸锻有限责任公司 | Machining device and machining method of high-hardness deep blind hole special-shaped curved surface |
| CN106624002A (en) * | 2016-12-06 | 2017-05-10 | 株洲钻石切削刀具股份有限公司 | Anti-vibration boring cutter |
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| CN2152620Y (en) * | 1993-04-10 | 1994-01-12 | 蒋林祥 | Solid floating finish tool |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103934487A (en) * | 2014-04-23 | 2014-07-23 | 哈尔滨汽轮机厂有限责任公司 | Boring tool used for machining deep holes of turbine sleeves and deep hole machining method |
| CN104190965A (en) * | 2014-07-30 | 2014-12-10 | 常州西利合金工具有限公司 | High-precision through hole reaming tool |
| CN105171001A (en) * | 2015-09-22 | 2015-12-23 | 武汉重工铸锻有限责任公司 | Machining device and machining method of high-hardness deep blind hole special-shaped curved surface |
| CN106624002A (en) * | 2016-12-06 | 2017-05-10 | 株洲钻石切削刀具股份有限公司 | Anti-vibration boring cutter |
| CN106624002B (en) * | 2016-12-06 | 2018-10-26 | 株洲钻石切削刀具股份有限公司 | A kind of antidetonation cutting tool for boring |
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| CN103447558B (en) | 2018-08-03 |
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