CN204247979U - A kind of drawing and pressing type tailstock mechanism of processing thin and long shafts workpiece - Google Patents
A kind of drawing and pressing type tailstock mechanism of processing thin and long shafts workpiece Download PDFInfo
- Publication number
- CN204247979U CN204247979U CN201420615614.6U CN201420615614U CN204247979U CN 204247979 U CN204247979 U CN 204247979U CN 201420615614 U CN201420615614 U CN 201420615614U CN 204247979 U CN204247979 U CN 204247979U
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- ball bearing
- tailstock
- radial ball
- pressing type
- taper shank
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Abstract
The utility model discloses a kind of drawing and pressing type tailstock mechanism of processing thin and long shafts workpiece, comprise the tailstock of lathe, this tailstock having 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.The utility model structure is simple, easy to operate, solves elongate rod not easily processing problems, change suitable adjustable pad and can also work as traditional top use except applying axial pre tightening force to processing work.
Description
Technical field
The utility model 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, and 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.
Utility model content
Technical problem to be solved in the utility model is, not enough for prior art, provides a kind of drawing and pressing type tailstock mechanism of processing thin and long shafts workpiece
,it conveniently can carry out the interpolation of part axial tension and compression pretightning force, effectively reduces the impact of axial cutting force on process, solves the unmanageable difficult problem of thin and long shafts workpiece preferably.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts 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 the utility model 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 utility model.
The utility model 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 the utility model drawing and pressing type tailstock mechanism 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 the utility model drawing and pressing type tailstock mechanism, 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, the beneficial effects of the utility model are: the utility model structure 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, the utility model workpiece stiffness obtains larger raising, and deflection obviously reduces, and processing mode is more reasonable.
Accompanying drawing explanation
Fig. 1 is the utility model drawing and pressing type tailstock mechanism one example structure sketch.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the utility model perspective view.
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, the utility model drawing and pressing type tailstock mechanism one 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 the utility model drawing and pressing type tailstock mechanism arrangement 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 |
|---|---|---|---|
| CN201420615614.6U CN204247979U (en) | 2014-10-23 | 2014-10-23 | A kind of drawing and pressing type tailstock mechanism of processing thin and long shafts workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420615614.6U CN204247979U (en) | 2014-10-23 | 2014-10-23 | A kind of drawing and pressing type tailstock mechanism of processing thin and long shafts workpiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204247979U true CN204247979U (en) | 2015-04-08 |
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ID=52952334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420615614.6U Expired - Fee Related CN204247979U (en) | 2014-10-23 | 2014-10-23 | A kind of drawing and pressing type tailstock mechanism of processing thin and long shafts workpiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204247979U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104400022A (en) * | 2014-10-23 | 2015-03-11 | 中航飞机起落架有限责任公司 | Tension and compression tailstock mechanism for machining slender shaft work-pieces |
-
2014
- 2014-10-23 CN CN201420615614.6U patent/CN204247979U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104400022A (en) * | 2014-10-23 | 2015-03-11 | 中航飞机起落架有限责任公司 | Tension and compression tailstock mechanism for machining slender shaft work-pieces |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 Termination date: 20171023 |