CN104400022B - Tension and compression tailstock mechanism for machining slender shaft work-pieces - Google Patents
Tension and compression tailstock mechanism for machining slender shaft work-pieces Download PDFInfo
- Publication number
- CN104400022B CN104400022B CN201410569541.6A CN201410569541A CN104400022B CN 104400022 B CN104400022 B CN 104400022B CN 201410569541 A CN201410569541 A CN 201410569541A CN 104400022 B CN104400022 B CN 104400022B
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- China
- Prior art keywords
- ball bearing
- tailstock
- radial ball
- taper shank
- head
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B23/00—Tailstocks; Centres
- B23B23/005—Tailstocks; Centres the centres being adjustable
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turning (AREA)
Abstract
The invention discloses a tension and compression tailstock mechanism for machining slender shaft work-pieces. The tension and compression tailstock mechanism comprises a tailstock of a lathe, wherein the tailstock is provided with a tailstock cavity and a tip shell for mounting a tip; one end of a draw bar is arranged in the tailstock cavity, and is fixedly connected with the tip shell through fixing nuts; the other end of the draw bar is combined with the tail part of a taper shank; the head of the taper shank is hollow; the tail end of an adjustable mandrel passes through adjusting nuts which are sequentially arranged from outside to inside, and a group of support bearings, and is arranged in the head of the taper shank; an adjusting gasket is arranged between the support bearings; a threaded hole which is used for connecting work-pieces is formed in the head of the adjustable mandrel. The tension and compression tailstock mechanism is simple in structure and convenient to operate, can also be used as a traditional tip by exchanging a proper adjusting gasket and solves the problem that a slender rod is not easy to machine by exerting axial pre-tightening force to the machined work-pieces.
Description
Technical field
The present invention relates to a kind of lathe back stand mechanism, particularly a kind of it is applied to the thin and long shafts workpiece that draw ratio is more than 20
The lathe drawing and pressing type tailstock mechanism of processing, it is suitably changed suitable adjustable pad and also has the top function of tradition.
Background technology
Thin and long shafts workpiece draw ratio exceeds 20 mostly, has a wide range of applications in productive life, the shape of workpiece itself
Shape feature makes its difficulty of processing big, is also easy to produce bending deformation and vibration, mainly by operation in production and processing under cutting force effect
Person's experience technical ability ensures the quality of product.What traditional processing method difficulty met slender axles Workpiece Machining Accuracy and production efficiency will
Ask, find the difficult breach of solution slender axles work pieces process and be just particularly important.Traditional elongate axle class turning mainly adopts
In the following manner: lathe tool has under sufficient intensity, increases anterior angle and the tool cutting edge angle of cutter as far as possible；Cutting speed vc=30-40m/min
When, amplitude is maximum, constitutes auxiliary radial support in one centre frame of elongate rod middle setting, using low speed or be carried out at high speed cutting
Processing, effectively prevents deflection deformation；Used cooperatively with live center using a folder one top feed reversing, or workpiece afterbody is using axially
Unfixed guide pin bushing eliminates part axial force.
Chinese scholars and expert have made a lot of researchs to the mechanism of poor rigidity during Turning of Slender Shaft and easy vibration, new
Bright, new technique also emerges in an endless stream, but also there is no a kind of preferable method so far or technique can efficiently to process high-quality elongated
Axle.
It is commonly encountered some draw ratios and be more than 20 thin and long shafts workpiece it is impossible to a top is pressed from both sides by tradition one in aeronautical product
Reversely the processing mode of feed and complete.Once some scholars, expert were had to propose to draw in driving and cut using a folder one using frock to add
Work, can solve the problems, such as part deformation in processing further.And the most bulky complex of such frock in reality processing, using pole
It is not convenient.
Content of the invention
The technical problem to be solved is, not enough for prior art, provides a kind of processing thin and long shafts workpiece
Drawing and pressing type tailstock mechanism, it can conveniently carry out the interpolation of part axial tension and compression pretightning force, effectively reduce axial cutting force to plus
The impact of work process, preferably solves the unmanageable difficult problem of thin and long shafts workpiece.
For solving above-mentioned technical problem, the technical solution adopted in the present invention is: the drawing of a kind of processing thin and long shafts workpiece
Pressure type tailstock mechanism, including the tailstock of a lathe, this tailstock has a tailstock chamber and for installing top top housing；One
It is loaded on this tailstock chamber in pull bar one end, and is connected with this top housing by fixing nut, the other end of this pull bar combines
The afterbody of one taper shank；The head hollow of this taper shank, adjustable nut through setting gradually from outside to inside of the tail end of an expansion mandrel and
One group of spring bearing is arranged in the head of this taper shank, and is provided with adjusting gasket between this spring bearing, this expansion mandrel
Head is provided with one for connecting the screwed hole of workpiece.
Being improved to further of such scheme, this taper shank is preferably Morse taper shank.
Being improved to further of such scheme, this group spring bearing includes the two-way thrust ball axle setting gradually from outside to inside
Hold, the first radial ball bearing and the second radial ball bearing, this adjusting gasket is arranged at this first radial ball bearing and second centripetal
Between ball bearing, this adjustable nut is connected with this double-direction thrust ball bearing.
Being improved to further of such scheme, the tail end of this expansion mandrel is provided with a boss, this adjustable nut, Bidirectional pulling
Power ball bearing is arranged at the outside of this boss, and this first radial ball bearing, adjusting gasket, the second radial ball bearing are set in turn in
The inner side of this boss.
Being improved to further of such scheme, this first and second radial ball bearing is single-row radial ball bearing or double-row
Ball bearing.
Being improved to further of such scheme, this expansion mandrel is with this lathe spindle center of rotation on the same line.
Present invention applicant sets about from the reason thin and long shafts work pieces process is deformed, to impact part machining deformation relatively
After a little folder one draws cooperation follow-rest processing method to enter in-depth analysis, in conjunction with lathe back stand mechanism, redesign this
Bright.
In turnery processing, incorporated by reference to shown in Fig. 1, the head of expansion mandrel 3 connects a craft thread cooperation to the present invention
Workpiece, and on spring bearing (double-direction thrust ball bearing 4, the first single-row radial ball bearing 5 and the second single-row radial ball bearing 7)
Revolution, is adjusted using adjustable nut 2 and screws the depth of thread, change the size of the axial pre tightening force being pre-applied to workpiece.Adjusting gasket 6
Cooperation adjustable nut 2 can achieve tension-compression functions, and when adjustable nut 2 screwing length reduces, adjusting gasket 6 extends, expansion mandrel 3 to
Outside axial movement, workpiece is axially compacted, otherwise when adjustable nut 2 screwing length increases, adjusting gasket 6 is compressed, adjustable
To inner shafts to movement, workpiece is axially stretched heart axle 3.For improving the machining accuracy of workpiece, drawing and pressing type tail of the present invention should be improved
Regulation heart axle 3 in seat mechanism and spring bearing precision are it is ensured that expansion mandrel 3 and lathe spindle center of rotation are in same straight line
On.Also need during processing to coordinate follow-rest or centre frame, reduce the workpiece deformation that radial force causes, improve machining accuracy and bright and clean
Degree.
Using ansys, drawing and pressing type tailstock mechanism of the present invention one is drawn in a folder, under a folder one two kinds of operating modes in top, to length
770mm, diameter phi 8mm, material is the elongated shaft-like work of No. 45 steel, the maximum distortion case study result such as Fig. 4 institute being processed
Show, understand that the method can effectively improve processing by analysis contrast, improve workpiece strength, can preferably solve to grow in actual production
Footpath is than a processing difficult problem for larger workpiece.
Compared with prior art, the invention has the benefit that present configuration is simple and convenient to operate, except leading to
Cross adjustable nut the processing workpiece adjustable axial pre tightening force of applying is difficult outside processing problems to solve elongate rod, change suitable tune
Section pad can also work as traditional top use, has the larger suitability and dissemination in the processing of thin and long shafts part.
Compare traditional installation way, workpiece stiffness of the present invention has been more greatly improved, and deflection is obviously reduced, and processing mode more closes
Reason.
Brief description
Fig. 1 is drawing and pressing type tailstock mechanism one of the present invention example structure sketch.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is perspective view of the present invention.
Fig. 4 is that an a Jia Yiding and folder one draws diverse location workpiece deformation pattern.
In figure: Morse taper shank 1, adjustable nut 2, expansion mandrel 3, double-direction thrust ball bearing 4, the first single-row radial ball bearing
5th, adjusting gasket 6, the second single-row radial ball bearing 7, pull bar 8, fixing nut 9, boss 31, screwed hole 32.
Specific embodiment
As shown in Figure 1-Figure 3, drawing and pressing type tailstock mechanism one of the present invention embodiment includes pull bar 8, fixing nut 9, Mohs cone
Handle 1, expansion mandrel 3, adjustable nut 2, double-direction thrust ball bearing 4, first and second single-row radial ball bearing 5 and 7, adjusting gasket 6.
Wherein it is loaded on the tailstock intracavity of a tail stock (not shown) in pull bar 8 one end, and by fixing nut 9 and tail stock
Top housing uses cooperatively, and makes drawing and pressing type tailstock mechanism arrangement of the present invention be mounted on lathe tail.The other end of this pull bar 8
Afterbody in conjunction with a Morse taper shank 1.The head hollow of this Morse taper shank 1, the tail end of an expansion mandrel 3 is arranged at this Morse taper shank
In 1 head, and the tail end of this expansion mandrel 3 is provided with a boss 31.Successively by adjustable outside the boss 31 of this expansion mandrel 3
Nut 2, double-direction thrust ball bearing 4 are fixed on the head inwall outer end of this Morse taper shank 1, inside the boss 31 of this expansion mandrel 3
Successively by the first single-row radial ball bearing 5, adjusting gasket 6, the head with this Morse taper shank 1 for second single-row radial ball bearing 7
Wall the inner is connected.The head of this expansion mandrel 3 is provided with a screwed hole 32, for matching with workpiece.
The first single-row radial ball bearing 5 in above-described embodiment and the second single-row radial ball bearing 7 are alternatively double-row
Ball bearing.
Claims (3)
1. a kind of drawing and pressing type tailstock mechanism of processing thin and long shafts workpiece, including the tailstock of a lathe, this tailstock has a tail
Seat chamber and for installing top top housing；It is characterized in that:
Be loaded on this tailstock chamber in one pull bar one end, and be connected with this top housing by fixing nut, this pull bar another
End combines the afterbody of a Morse taper shank；The head hollow of this Morse taper shank, the tail end of an expansion mandrel is through setting successively from outside to inside
The adjustable nut put and one group of spring bearing are arranged in the head of this taper shank, and this group spring bearing includes setting successively from outside to inside
Double-direction thrust ball bearing, the first radial ball bearing and the second radial ball bearing put, this first radial ball bearing and second centripetal
Between ball bearing, adjusting gasket is set, is provided with a boss outside the tail end of this expansion mandrel, this adjustable nut, two-way thrust ball
Bearing is arranged at the outside of this boss, and this first radial ball bearing, adjusting gasket, that the second radial ball bearing is set in turn in this is convex
The inner side of platform, and the head of this expansion mandrel is provided with one for connecting the screwed hole of workpiece.
2. a kind of processing thin and long shafts workpiece according to claim 1 drawing and pressing type tailstock mechanism it is characterised in that: this
First, two radial ball bearings are single-row radial ball bearing or double-row radial ball bearing.
3. a kind of processing thin and long shafts workpiece according to claim 1 drawing and pressing type tailstock mechanism it is characterised in that: this can
Regulation of mental activities axle is with this lathe spindle center of rotation on the same line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410569541.6A CN104400022B (en) | 2014-10-23 | 2014-10-23 | Tension and compression tailstock mechanism for machining slender shaft work-pieces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410569541.6A CN104400022B (en) | 2014-10-23 | 2014-10-23 | Tension and compression tailstock mechanism for machining slender shaft work-pieces |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104400022A CN104400022A (en) | 2015-03-11 |
| CN104400022B true CN104400022B (en) | 2017-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410569541.6A Active CN104400022B (en) | 2014-10-23 | 2014-10-23 | Tension and compression tailstock mechanism for machining slender shaft work-pieces |
Country Status (1)
| Country | Link |
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| CN (1) | CN104400022B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104959629A (en) * | 2015-06-29 | 2015-10-07 | 安庆市吉安汽车零件锻轧有限公司 | Improvement method of shaft part machining technology |
| CN107052131A (en) * | 2016-12-28 | 2017-08-18 | 宁波市精恒凯翔机械有限公司 | Cutting knife tool is rushed in one kind rotation |
| CN114378382A (en) * | 2022-01-28 | 2022-04-22 | 湖南科技大学 | Electric pulse auxiliary processing device for processing slender shaft parts and processing method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009220242A (en) * | 2008-03-18 | 2009-10-01 | Ricoh Co Ltd | Turning device |
| CN201880929U (en) * | 2010-11-30 | 2011-06-29 | 上海航天精密机械研究所 | Turning and tensioning device for slender shaft type parts |
| CN202825254U (en) * | 2012-06-26 | 2013-03-27 | 韶关市第二技师学院 | Turning fixture for slender shaft |
| CN203635976U (en) * | 2013-11-03 | 2014-06-11 | 西安志越机电科技有限公司 | Turning clamping device of thin-wall circular pipe |
| CN203751363U (en) * | 2014-01-07 | 2014-08-06 | 江西铜业股份有限公司 | Multifunctional chuck for lathe tailstock |
| CN204247979U (en) * | 2014-10-23 | 2015-04-08 | 中航飞机起落架有限责任公司 | A kind of drawing and pressing type tailstock mechanism of processing thin and long shafts workpiece |
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2014
- 2014-10-23 CN CN201410569541.6A patent/CN104400022B/en active Active
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| CN104400022A (en) | 2015-03-11 |
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