CN104400022A - 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
- CN104400022A CN104400022A CN201410569541.6A CN201410569541A CN104400022A CN 104400022 A CN104400022 A CN 104400022A CN 201410569541 A CN201410569541 A CN 201410569541A CN 104400022 A CN104400022 A CN 104400022A
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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 lathe drawing and pressing type tailstock mechanism being applied to draw ratio and being greater than the thin and long shafts work pieces process of 20, 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, have a wide range of applications in productive life, the features of shape of workpiece itself makes its difficulty of processing large, under cutting force effect, easily produce bending deformation and vibration, the main quality ensureing product by operator's experience technical ability in production and processing.Traditional processing method difficulty meets the requirement of slender axles Workpiece Machining Accuracy and production efficiency, finds the breach solving slender axles work pieces process Nan Questions and just seems particularly important.The turning of traditional elongate axle class is main in the following ways: under lathe tool has sufficient intensity, increases anterior angle and the tool cutting edge angle of cutter as far as possible; During cutting speed VC=30-40m/min, amplitude is maximum, arranges a centre frame and form auxiliary radial support in the middle of elongate rod, adopts low speed or carries out machining at a high speed, effectively preventing deflection deformation; Adopt folder one top feed reversing and a live center with the use of, or workpiece afterbody uses axially unfixed guide pin bushing elimination part axial force.
Chinese scholars and the mechanism of expert to poor rigidity during Turning of Slender Shaft and easily vibration have done a lot of research, and new invention, new technology also emerge in an endless stream, but also do not have a kind of method or technique preferably can process high-quality slender axles efficiently so far.
In aeronautical product, often run into the thin and long shafts workpiece that some draw ratios are greater than 20, cannot be completed by the processing mode of the tradition one folder one reverse feed in top.Once there is some scholars, expert proposed to utilize frock to adopt a folder one to draw in row turnery processing, the problem of part deformation in processing can be solved further.And the most bulky complex of this type of frock in reality processing, use extremely not convenient.
Summary of the invention
Technical problem to be solved by this invention is, not enough for prior art, provides a kind of drawing and pressing type tailstock mechanism of processing thin and long shafts workpiece
, its energyconveniently carry out the interpolation of part axial tension and compression pretightning force, effectively reduce the impact of axial cutting force on process, solve the unmanageable difficult problem of thin and long shafts workpiece preferably.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of drawing and pressing type tailstock mechanism of processing thin and long shafts workpiece, comprises the tailstock of a lathe, this tailstock has a tailstock chamber and for installing top top housing; Be loaded on this tailstock chamber in one pull bar one end, and be connected and fixed by hold-down nut and this top housing, the other end of this pull bar is in conjunction with the afterbody of a taper shank; The head hollow of this taper shank, adjustable nut through setting gradually from outside to inside of the tail end of one expansion mandrel and one group of spring bearing are arranged in the head of this taper shank, and being provided with adjustment pad between this spring bearing, the head of this expansion mandrel 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 comprises the double-direction thrust ball bearing, the first radial ball bearing and the second radial ball bearing that set gradually from outside to inside, this adjustment pad is arranged between this first radial ball bearing and second radial ball bearing, and 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, double-direction thrust ball bearing are arranged at the outside of this boss, and this first radial ball bearing, adjustment pad, 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 radial ball bearing.
Being improved to further of such scheme, this expansion mandrel and this lathe spindle pivot are on the same line.
The reason that present invention applicant produces distortion from thin and long shafts work pieces process is set about, and on affect after the less folder one of part machining deformation draws cooperation follow-rest processing method to enter in-depth analysis, in conjunction with lathe back stand mechanism, has redesigned the present invention.
The present invention is when turnery processing, shown in Fig. 1, the head of expansion mandrel 3 connects the workpiece of a craft thread cooperation, and at spring bearing (double-direction thrust ball bearing 4, first single-row radial ball bearing 5 and the second single-row radial ball bearing 7) upper rotary, utilize adjustable nut 2 to regulate and screw the depth of thread, change the size adding to the axial pre tightening force of workpiece in advance.Pad 6 is regulated to coordinate adjustable nut 2 to realize tension-compression functions, when adjustable nut 2 screwing length reduces, pad 6 is regulated to extend, expansion mandrel 3 moves axially laterally, workpiece spindle to compacted, otherwise when adjustable nut 2 screwing length increases, regulates pad 6 to be compressed, expansion mandrel 3 moves axially to the inside, and workpiece spindle is to being stretched.For improving the machining accuracy of workpiece, the adjustment axle 3 in drawing and pressing type tailstock mechanism of the present invention and spring bearing precision should be improved, ensureing expansion mandrel 3 and lathe spindle pivot on the same line.Add and also need man-hour to coordinate follow-rest or centre frame, reduce the workpiece deformation that radial load causes, improve machining accuracy and fineness.
ANSYS is utilized one to draw at a folder drawing and pressing type tailstock mechanism of the present invention, under the two kinds of operating modes in folder one top, to long 770mm, diameter of phi 8mm, material is No. 45 steel slender axles workpiece, carry out the maximum distortion case study result of processing as shown in Figure 4, effectively can improve processing by the known the method for analysis contrast, improve workpiece strength, a processing difficult problem for the larger workpiece of draw ratio can be solved preferably in actual production.
Compared with prior art, beneficial effect of the present invention is: structure of the present invention is simple, easy to operate, except adjustable axial pre tightening force can be applied to solve elongate rod not easily except processing problems by adjustable nut to processing work, change suitable adjustable pad and can also work as traditional top use, in the processing of thin and long shafts part, there is larger applicability and dissemination.Compare traditional installation way, workpiece stiffness of the present invention obtains larger raising, and deflection obviously reduces, and processing mode is more reasonable.
Accompanying drawing explanation
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 a Jia Yiding and presss from both sides one and draws diverse location workpiece deformation figure.
In figure: Morse taper shank 1, adjustable nut 2, expansion mandrel 3, double-direction thrust ball bearing 4, first single-row radial ball bearing 5, adjustment pad 6, second single-row radial ball bearing 7, pull bar 8, hold-down nut 9, boss 31, screwed hole 32.
Detailed description of the invention
As shown in Figure 1-Figure 3, drawing and pressing type tailstock mechanism one of the present invention embodiment comprises pull bar 8, hold-down nut 9, Morse taper shank 1, expansion mandrel 3, adjustable nut 2, double-direction thrust ball bearing 4, first and second single-row radial ball bearing 5 and 7, regulates pad 6.Wherein be loaded in the tailstock chamber of a tail stock (not shown) in pull bar 8 one end, and by the top housing of hold-down nut 9 and tail stock with the use of, make drawing and pressing type tailstock mechanism arrangement of the present invention be mounted on lathe tail.The other end of this pull bar 8 is in conjunction with the afterbody of a Morse taper shank 1.The head hollow of this Morse taper shank 1, the tail end of an expansion mandrel 3 is arranged in the head of this Morse taper shank 1, and the tail end of this expansion mandrel 3 is provided with a boss 31.Be fixed on the head inwall outer end of this Morse taper shank 1 outside the boss 31 of this expansion mandrel 3 successively by adjustable nut 2, double-direction thrust ball bearing 4, be connected with head inwall the inner of this Morse taper shank 1 by the first single-row radial ball bearing 5, adjustment pad 6, second single-row radial ball bearing 7 successively inside the boss 31 of this expansion mandrel 3.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 also can be double-row radial ball bearing.
Claims (6)
1. a drawing and pressing type tailstock mechanism for processing thin and long shafts workpiece, comprises the tailstock of a lathe, this tailstock has a tailstock 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 and fixed by hold-down nut and this top housing, the other end of this pull bar is in conjunction with the afterbody of a taper shank; The head hollow of this taper shank, adjustable nut through setting gradually from outside to inside of the tail end of one expansion mandrel and one group of spring bearing are arranged in the head of this taper shank, and being provided with adjustment pad between this spring bearing, the head of this expansion mandrel is provided with one for connecting the screwed hole of workpiece.
2. the drawing and pressing type tailstock mechanism of a kind of processing thin and long shafts workpiece according to claim 1, is characterized in that: this taper shank is Morse taper shank.
3. the drawing and pressing type tailstock mechanism of a kind of processing thin and long shafts workpiece according to claim 1, it is characterized in that: this group spring bearing comprises the double-direction thrust ball bearing, the first radial ball bearing and the second radial ball bearing that set gradually from outside to inside, this adjustment pad is arranged between this first radial ball bearing and second radial ball bearing, and this adjustable nut is connected with this double-direction thrust ball bearing.
4. the drawing and pressing type tailstock mechanism of a kind of processing thin and long shafts workpiece according to claim 3, it is characterized in that: the tail end of this expansion mandrel is provided with a boss, this adjustable nut, double-direction thrust ball bearing are arranged at the outside of this boss, and this first radial ball bearing, adjustment pad, the second radial ball bearing are set in turn in the inner side of this boss.
5. the drawing and pressing type tailstock mechanism of a kind of processing thin and long shafts workpiece according to claim 3, is characterized in that: this first and second radial ball bearing is single-row radial ball bearing or double-row radial ball bearing.
6. the drawing and pressing type tailstock mechanism of a kind of processing thin and long shafts workpiece according to claim 1, is characterized in that: this expansion mandrel and this lathe spindle pivot are 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 true CN104400022A (en) | 2015-03-11 |
| CN104400022B 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 |
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| Country | Link |
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| CN (1) | CN104400022B (en) |
Cited By (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 |
Citations (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 |
-
2014
- 2014-10-23 CN CN201410569541.6A patent/CN104400022B/en active Active
Patent Citations (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 |
Cited By (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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104400022B (en) | 2017-02-01 |
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