CN203197289U - Vibration reducing boring bar - Google Patents
Vibration reducing boring bar Download PDFInfo
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- CN203197289U CN203197289U CN 201320122009 CN201320122009U CN203197289U CN 203197289 U CN203197289 U CN 203197289U CN 201320122009 CN201320122009 CN 201320122009 CN 201320122009 U CN201320122009 U CN 201320122009U CN 203197289 U CN203197289 U CN 203197289U
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Abstract
The utility model discloses a vibration reducing boring bar. The vibration reducing boring bar comprises a boring bar sleeve, an inner boring bar, a driving mechanism and a locking device, wherein the inner boring bar is circumferentially restrained and circumferentially guided in an inner hole of the boring bar sleeve, the driving mechanism drives the inner boring bar to stretch out of the boring bar sleeve in overhanging length in a suspension mode, and the locking device locks the inner boring bar and the boring bar sleeve at the target overhanging length. The vibration reducing boring bar is strong in adaptability and can effectively restrain vibration.
Description
Technical field
The utility model relates to a kind of damping boring bar.
Background technology
In the Boring process, boring bar is in the state of overhanging, and the length that generally overhangs is no more than 10 times of its diameter, otherwise very easily causes vibration.When the boring bar vibration-generating, the processing work surface roughness increases, and dimensional tolerance strengthens, and boring cutter easily damages.The vibration of boring bar can also cause the vibration of lathe, causes the damage of lathe.Therefore, boring processing is the emphasis problem of a lot of scholars and engineer's research.
There is document to point out (YKomai of NT engineering company and Nakagawa book), the Regenerative Chatter problem that occurs in metal cutting process is very important, and should prevent to surpass the dither of 10KHz in the right boring process and the problem that cutter life reduces and machining accuracy reduces that causes.The result of the problem of vibration damping more shows as the inhibition to flutter frequency.
The method of inhibition vibration is a lot, and general method is the length that overhangs, the diameter that increases boring bar that reduces boring bar, the elastic modelling quantity that reduces the materials increase boring bars such as cutting data, employing carbide alloy, pottery at present.
More external companies have developed a kind of boring bar that utilizes dynamic shock absorber to come vibration damping, such as the Ken Na of the U.S., and the Sandvik of Sweden.The damping boring bar of Sandvik AB's exploitation, maximum outstanding footpath is than reaching 14:1, and the boring bar diameter reaches 300mm.Domestic boring bar research still is in laboratory stage, does not have the boring bar manufacturing enterprise of mass.The weak point of domestic and international existing power vibration damping boring bar is:
1. stock-removing efficiency is low.Analyzing the damping boring bar kinetic model can find, the mass ratio that improves damping block and boring bar body can improve the effectiveness in vibration suppression of boring bar.For this reason, must increase the volume of damping block, the aperture that increases the boring bar inner chamber, hole length in increasing, the rigidity that this has reduced again the boring bar body has reduced effectiveness in vibration suppression on the contrary.
Through optimal design, can produce more satisfactory damping boring bar.Take the Sandvik damping boring bar as example, boring bar diameter 120mm, the boring bar of the above specification of length 1900mm, the length that overhangs reaches a certain amount of just can reach preferably effectiveness in vibration suppression.The bare terminal end of this type of boring bar is positioned at the rear end, and the position boring bar body that overhangs is weak, and the damping block volume is large, can not grip.Although this type of boring bar good damping result, the cutting output that can bear is little, and stock-removing efficiency is low.
2. the service condition of boring bar is relatively harsher.Study damping boring bar both at home and abroad, most bare terminal ends with boring bar are considered as desirable stiff end, friction, and without distortion, this and actual operating position differ widely.Use as example at lathe with boring bar, boring bar is fixed on the transportable knife rest.The lathe kind is a lot, knife rest vibration frequency and the rigidity of different lathes differ widely, and the performance parameter of boring bar is fixed, same boring bar, cutting vibration situation on different lathes differs widely, even ideally the good boring bar of effectiveness in vibration suppression also may vibrate on some lathe, this has increased the application risk of boring bar greatly.
When the boring bar diameter larger, overhang when longer, in the Boring Process, the unbalance loading moment of boring bar system is larger, directly causes distortion and the vibration of lathe associated components.The research discovery, the boring vibration is not only relevant with boring bar, but closely related with the structure of lathe, can obviously improve the cutting situation behind the increase servicing unit, and this point is often ignored by people.
Accept the 3rd point, Chinese CN202591649U utility model Granted publication discloses a kind of damping boring bar.It proposes boring bar configuration slider support, increases the rigidity of boring bar from structure, uses the spring increase to the inhibition of vibration.The end that boring bar is equipped with boring cutter in the hole of moulding by with the slider support of spring at work piece inner surface, the end that this structure becomes boring bar is supported for two end supports, but this support can not suppress the problem of boring bar vibration effectively, be just time certain vibrations in city of creeping of the strong point itself, and spring just produces vibration damping, but vibration frequency is amplified in this damping meeting.And the adjustment of its every cutter cutting relatively bothers.
Summary of the invention
Therefore, the purpose of this utility model aims to provide a kind of strong adaptability and damping boring bar that can the establishment flutter.
The utility model is by the following technical solutions:
A kind of damping boring bar comprises boring bar cover and circumferentially constraint is axially directed in the interior boring bar of boring bar cover endoporus, and the boring bar driving mechanism of the length that overhangs of boring bar cover and the target locking device that boring bar and boring bar overlap in the locking that overhangs under the length that overhangs out in driving.
As can be seen from the above technical solutions, according to the utility model in response to overhang defective a little less than the partially rigid of boring bar, by set the boring bar cover improve in the overhang rigidity of part of boring bar, the shearing resistance section factor of boring bar cover is relatively large, can bear larger cutting force.During in the face of the axle sleeve fit structure, can run into simultaneously the sagging drift angle that produces when the internal boring bar of fit clearance overhangs out, for this reason, after the respective length that overhangs out, by boring bar in the locking device locking, eliminate fit clearance, make interior boring bar and boring bar cover keep strictly coaxial.Thereby, can effectively suppress flutter by said structure, simultaneously, mate different application, adjust the entire length of boring bar, adaptability is more intense.
The technical problem of corresponding the second aspect, above-mentioned damping boring bar, the change of simple said structure, show as the change of shearing resistance section factor, can increase to a certain extent whole scale, and this change can be subject to processing the endoporus limited aperture to a certain extent, so for when further suppressing flutter, reduce the boring bar scale, the gripping section that described interior boring bar comprises for the overhanging section that extends boring bar length and is used for engaging with the boring bar cover, wherein overhanging section is hollow structure, under the same cross-sectional area condition, the antitorque ability of cutting strengthens, and the outer end is provided with the boring cutter seat, endoporus is provided with the main damping block coaxial with endoporus in boring cutter seat side, and all the other inner chambers of overhanging section are the liquid filler material chamber.So in the boring bar use procedure, boring bar is subject to the effect of alternation cutting force and vibrates, this moment, the main damping block of boring bar inside can produce a vibration that relatively lags behind, so that the direction of vibration of principal oscillation piece is opposite with the direction of vibration of boring bar body, thus the amplitude of counteracting boring bar body.And the filling chamber is mainly used in filling liquid, for generation of damping, thereby vibration frequency and amplitude is produced corrective action.
The inventor thinks, vibration damping should only not only limit to boring bar self, and other parts of lathe may also can affect effectiveness in vibration suppression, and as the consideration of the 3rd aspect, the end that above-mentioned damping boring bar, boring bar cover are different from damping block place end is provided with the balance shock piece coaxially.Balance shock is positioned at the rear end of boring bar cover soon, the rear end of retaining part in other words, and cutting force that not only can balance bare terminal end front side can also play damping effect to the lathe hold assembly.
Different technique objects is different to the requirement of vibration damping, top structure can be adjusted mostly, coupling balance shock piece, the technical problem of the 4th aspect then is to technique object adaptability widely, thereby, above-mentioned damping boring bar, described balance shock piece comprises nut as matrix, be bonded on the external conical sleeve that has male cone (strobilus masculinus) on the nut periphery exterior feature and be enclosed within this external conical sleeve on and have the inner conical drogue of the inner conical surface identical with the male cone (strobilus masculinus) gradient, and be arranged on the secondary damping block on the inner conical drogue;
One of inner conical drogue and external conical sleeve are elastomer, are furnished with the locking nut of adjusting inner conical drogue axial location on external conical sleeve in the inner conical drogue wear side;
Accordingly, described boring bar cover respective end is provided with the spiro rod section that cooperates with described nut and locking nut.
Thereby according to said structure, nut is used for the adjustment of balance shock piece position, adjusts damping parameter; Locking nut is then adjusted the rigidity of balance shock piece self by the compression degree, adjust blanketing frequency, realizes further parameter adjustment.
Preferably, described main damping block shows as at axial pouring weight broad in the middle and that reduce with the width of cloth to two ends, the covering surface rubber ring forms cylinder, be positioned at corresponding endoporus inner end, the other end is then held by described boring cutter seat by sealing ring, and the boring cutter seat is by the tolerance that bolt is fixing at interior boring bar and adjustment holds of axial arrangement.Thereby the adjustment of pouring weight compound rubber body obtains the tracking to blanketing frequency.
Above-mentioned damping boring bar, as previously mentioned, for eliminate interior boring bar overhang under the condition with boring bar cover fit clearance produce sagging, adopt the means of eliminating fit clearance, precondition, should not affect the adjustment of the length that overhangs, so adopt the controlled interference of certain forms, can guarantee the structural stability that cooperates, for this reason, according to preferred embodiment, a kind of better selection is that described locking device is the expansion sleeve that is bonded between interior boring bar and the boring bar cover, boring bar is enclosed within the position that is provided with expansion sleeve and has radial screw bore, the screw that cooperates with this screwed hole press the skewback that radially arranges by the top and with expansion sleeve on default wedge groove form wedge and cooperate, with the conversion of the part radial motion that matches with expansion sleeve for the skewback axially-movable.The adjustment that cooperates by wedge so realizes the swelling of expansion sleeve and gets loose realizing getting loose and the swelling under the elimination gap state under the adjustment state, adjusts very convenient.
In order to guarantee support stiffness, above-mentioned damping boring bar, the inner expension cap of described expansion sleeve and outer expansion set all are furnished with the wedge fit structure, and all are provided with axisymmetrically a pair of.
Further, above-mentioned damping boring bar, in order to guarantee support stiffness, described expansion sleeve is provided with a pair of.
Preferably, described locking device also is included in the front expansion set of the port setting that overhangs of boring bar cover, can further improve support stiffness.
Above-mentioned damping boring bar, described driving mechanism are the screw screw mechanism, and accordingly, described interior boring bar is provided with the female seat of this screw screw mechanism, and corresponding lead screw shaft puts to being positioned at described boring bar.The adjustment of boring bar can realize accurate adjustment like this.
Consider by reference to the accompanying drawings more detailed description, above-mentioned and other purpose of the present utility model and advantage will be more apparent.
Description of drawings
Fig. 1 is the structural representation according to a kind of interior boring bar of the present utility model.
Fig. 2 is the structural representation according to a kind of boring bar cover of the present utility model.
Fig. 3 is a kind of cross-sectional structural representation of inner expension cap.
Fig. 4 is the left view corresponding to Fig. 3.
Fig. 5 is a kind of structural representation of balance shock piece.
Fig. 6 is according to the complete retraction schematic diagram of boring bar in the assembly structure of a kind of damping boring bar of the present utility model.
Fig. 7 is a kind of configuration state that interior boring bar overhangs and partly all stretches out under the confined state.
Among the figure: 1. screw, 2. interior boring bar body, 3. gathering sill is 4. stifled, 5. back-up ring, 6. damping block, 7. rubber ring, 8. sealing ring, 9. packing ring, 10. cutter holder, 11. adjust screws, 12. push type broach screws.
13. screw mandrel, 14. circlips for shaft, 15. packing rings, 16. ring flanges, 17. axle sleeves, 18. boring bar bodies, 19. skewback, 20. screws, 21. screws, 22. skewbacks, 23. inner expension caps, 24. outer expansion sets, 25. screws, 26. key, 27. gathering sills, 28. front expansion sets, 29. screws, 30 screws.
31. nut, 32. rubber rings, 33. damping blocks.
35 keys, 36. boring bar supports, 37. boring bar glands.
The specific embodiment
With reference to Figure of description 1 to 6, coupling different process object adopts boring bar shown in Figure 2 to overlap the mode that combines with interior boring bar shown in Figure 1, by the different total lengths of adjusting boring bar of technique object.
In the technical problem of a level, adopt damping block, the mode of utilizing vibration to offset suppresses flutter.
Amplified the general structure of interior boring bar by Fig. 1:
Interior boring bar body 2 integral body are hollow cylindrical structure, and with general boring bar comparing class seemingly, conventional boring bar integral body also shows as a tubular bodies.Why be designed to tubular bodies and be in the situation of self less weight, to have larger rigidity.The interior boring bar part of boring bar as a whole here, hereinafter to its concrete effect in conjunction with boring bar cover further instruction, at this basic structure of interior boring bar is described first.
Consider the combination of interior boring bar and boring bar cover, it is evident that, interior boring bar still has certain length in the boring bar cover when maximum overhangs state, can guarantee that like this it has the reliable assembly foundation of precision.Thereby, herein in the boring bar overhanging section that should have the maximum length that overhangs of coupling, in addition corresponding, remainder shows as for its pinpoint gripping section in the boring bar cover.
About the orientation, should be noted that common head refers to be equipped with the end of cutter, afterbody then is the end that is connected to lathe cutter saddle such as boring bar.
As shown in Figure 1, be provided with damping block 6 at the right part of figure, play main damping effect.Improve so the mass ratio of damping block 6 and interior boring bar body 2, head end endoporus aperture is large in other words for interior boring bar body 2 front ends, the hole wall relative thin, and hole depth is large, and in order to increase effectiveness in vibration suppression, this section is the part that overhangs.
In order to alleviate the weight of boring bar, do not weaken rigidity simultaneously, hollow-core construction is processed in interior boring bar body 2 rear ends, need not hold damping block, and hole wall is thicker, and this section is as the part that grips of interior boring bar.
Damping block 6 materials are adopted as the relatively large tungsten-cobalt alloy of density, and suits rubber ring 7 in two ends forms whole cylindrical structure, both together pack into endoporus of interior boring bar body 2 front ends.
Such as Fig. 1 right-hand member, packing ring 9 outer shrouds and the inner hole refined close fit of rubber mass are used for sealing and conduct pad.
Adjust screw 11 extruded gaskets 9, and then through pushing thus rubber ring 7, thereby adjust the rigidity of rubber ring 7, produce the coupling to flutter frequency.
Interior boring bar body 2 overhang the part remaining space in be full of methyl-silicone oil or the ethyl silicon oil that is not easy to cause corrosion, also can adopt other the close liquid of character.Nature also can adopt the relatively low substitute of performance in order to save cost.
Vibration attenuation mechanism: in the Boring process, boring bar is subject to the effect of alternation cutting force and vibrates, the damping block 6 of boring bar inside can produce a vibration that relatively lags behind in this moment, so that the direction of vibration of damping block 6 is opposite with the direction of vibration of interior boring bar body, thus the amplitude of boring bar body in offsetting.Silicone oil plays damping action, adjusts the rigidity of rubber ring 7 and can adjust vibration frequency and amplitude.
About the boring bar cover, as shown in Figure 2, the boring bar cover is hollow-core construction, and he is the critical piece that bears bending, and when interior boring bar was fully retracted the boring bar cover, the rigidity of boring bar showed as the integral rigidity after both combinations.
In above-mentioned structure, thus boring bar cover and interior boring bar again configuration driven mechanism consist of stretching structure, just can mate so accordingly different technique objects, the entire length of adjustment boring bar.Such structure is different from whole increase scale and increases the means of boring bar rigidity, the whole boring bar rigidity that increases must be the overall dimensions that increases whole boring bar, there is waste, and for aperture relatively add the underaction in man-hour, even be subject to the size of whole boring bar and can't process the workpiece of smaller aperture due.Take the Sandvik boring bar as example, the damping boring bar of diameter 150mm is compared with the damping boring bar of diameter 250, and price differs nearly 250,000!
In order to remedy overhang characteristics a little less than the partially rigid of interior boring bar, boring bar cover hole wall can be relatively thick on the one hand, can bear larger cutting force, and on the other hand, section factor is relatively large, further improves cutting force.
Boring bar is enclosed within tail end, and namely as shown in Figure 2 left end is provided with one section thinner position, processes external screw thread, is used for the installation of the balance shock piece that configures.
As the component part of driving mechanism, screw mandrel 13 is equipped with in boring bar cover left side, cooperates the above screw 1 to be used for adjusting the flexible of interior boring bar.
Adopt in some applications the structure of manually adjusting, screw mandrel configuration handwheel can also reserve bolt head, saves the space, and the bolt head that reserves configures other instruments and adjusts.
Lathe is typically equipped with hydraulic system, and the adjustment of interior boring bar also can be adopted hydraulic cylinder.And described locking device can adopt hydraulic pressure plate.
The hydraulic means more complicated, cost is high; Different machine tool hydraulic systems are variant, such as pressure, interface size, also not necessarily leave unnecessary interface; Boring bar generally needs frequent dismounting, loads onto during use, removes in the time of no, and the equipped hydraulic device is inconvenient.
About described locking device, can adopt the structure of friction lock, such as puller bolt, but this structure is easily damaged interior boring bar, locking poor rigidity, easily distortion.Can arrange bearing shell this moment at the centripetal end of puller bolt, uses bearing shell to cooperate with interior boring bar outer surface and realize locking.
Can also adopt chuck structure in some applications, perhaps adopt the drive part of chuck structure, namely valve snail line part drives centripetal 3 or 4 tile fragments, realizes the locking of precision centering.
In some applications, adopt expansion sleeve to lock, expansion sleeve is a kind of keyless joint device originally, generally also referred to as expansion set, in some concrete application, also be called as expansion sleeve, its principle and purposes are the effects by the high strength tension bolt, producing huge enclasping force between interior ring and the axle, between outer shroud and the wheel hub, to realize the keyless joint of parts and axle.When bearing load, lean on frictional force transmitting torque, axial force or the combined load of the two in conjunction with pressure and together generation of expansion set and parts, axle.The expansion set connection mainly contains following advantage: accuracy of alignment is high; Installation/adjustment/convenient disassembly; Intensity is high, and connective stability is reliable; When overload, can protect equipment not to be damaged, be particularly useful for transmitting heavy loads.Be widely used in the fields such as heavy-duty machinery, wind-power electricity generation, package packing machine, printing machinery, Digit Control Machine Tool, automation equipment.
Use expansion sleeve to lock at this paper, save the space, simple in structure, cost is low, can guarantee accurate accuracy of alignment, and then guarantees machining accuracy.
Because boring bar is relatively long, in order to obtain higher clamping rigidity, expansion sleeve should dispose two covers at least.
As shown in Figure 2, boring bar cover inside is provided with three cover expansion sleeves, is used for the clamping of interior boring bar.Middle two place's expansion sets are identical, and main body is the identical inner expension cap of tapering 23, outer expansion set 24, outside both conical surfaces one interior one, then configuration arranges skewback 19, skewback 22 in the side relatively, and these two skewbacks are used as radially and adjust, principle is the wedge principle, utilizes the mobile conversion of inclined-plane on orthogonal direction.
Referring to Figure of description 3, inner expension cap 23 is circular ring structure with outer expansion set 24.Outer expansion set is 24 fixing by screw 25.
Inner expension cap 23 structure charts such as Fig. 3, wherein, inclined-plane a cooperates with skewback 19, and inclined-plane b cooperates with skewback 22, and inclined-plane c cooperates with outer expansion set 24.Inclined-plane b is 4 place's inclined holes, take expansion sleeve axially as reference axis symmetrical.Thereby tighten the screw 20 that radially arranges, by the extruding of skewback 19, under the boosting function of inclined-plane a, the axial displacement that inner expension cap 23 produces trace, behind outer expansion set 24 and inclined-plane c reinforcement, inner expension cap 23 produces radial deformation, thus boring bar in clamping; In like manner, tighten screw 21, interior boring bar is relaxed, and is that inclined-plane a is opposite with inclined-plane b slope oblique opposite in other words, and the power that produces is opposite.
As shown in Figure 3, the gap d in the inner expension cap 23 is used for the bit shift compensation space of radial deformation.
Boring bar cover right side endoporus is taper seat, and what cooperate with it is front expansion set 28, and its screw 29 by axial arrangement carries out harmomegathus, the character of coupling taper seat, and those skilled in the art is to be understood that its operation principle.
According to said structure, tighten screw 29, front accounts 28 axial displacements behind the conical surface reinforcement, produce radial deformation, boring bar in the chucking.
30 on screw is to hold at boring bar cover end face, turns so screw 30, produces screw thread lift, is used for front accounts 28 and overcomes the damping that distortion produces and withdraw from.
In Fig. 2, key 26 is flat key, is matched with the gathering sill 3 of axial setting shown in Figure 1, axially is directed to, and circumferentially is positioned, and is used for the guiding of interior boring bar and spacing.
To a certain extent, the object that boring bar cover herein will conduct the same as traditional boring bar be driven directly can configure so accordingly gathering sill 27 and be used for the guiding of boring bar cover and spacing, and this point can be with reference to the locate mode that boring bar is arranged first.
See again the balance damping block, in aforesaid content, referring to Figure of description 2, the tail end of boring bar cover, left end is provided with one section screw rod among the figure, at this section screw rod configuration balance shock piece.Its structure as shown in Figure 5, described balance shock piece comprises nut 31 as matrix, be bonded on the external conical sleeve that has male cone (strobilus masculinus) on the nut 31 periphery exterior features and be enclosed within this external conical sleeve on and have an inner conical drogue of the inner conical surface identical with the male cone (strobilus masculinus) gradient, and be arranged on secondary damping block on the inner conical drogue, specifically as shown in Figure 5, nut 31 can directly be configured to the outside and be taper seat, cooperate with the rubber ring 32 with coupling inner conical surface, the external thread of screw that the internal thread of nut 31 is corresponding with the boring bar cover cooperates.
In concrete a kind of application, nut 31 outsides itself are taper seats, and nut 31 is tapered cup nut in other words, and certainly as rigid body, rubber ring 32 inboards are the inner conical surfaces that cooperate with nut 31, and structure is relatively simple, and applicability is stronger.
When adopting two tapered sleeve structures, arbitraryly all can adopt elastomer, such as rubber ring 32, itself and damping block 33 are an integral body, can cast to form after damping block 33 is made.Damping block 33 is the tungsten-cobalt alloy of large density, and vibration attenuation mechanism is identical with interior boring bar.
Configure simultaneously a locking nut, be used for adjusting the inner conical drogue wear side and be furnished with the inner conical drogue of adjustment axial location on external conical sleeve, the tightness of adjusting nut 34 can also be adjusted the rigidity of rubber ring 32, and this is the reason that nut 31 and the registration interface designs of rubber ring 32 become the conical surface.Nut 34 as shown in Figure 6.
And then in Fig. 6, all retract boring bar cover of interior boring bar is inner.Key 35 is used for guiding and the anti-rotation of boring bar cover, and boring bar support 36 is used for gripping of boring bar cover with boring bar gland 37.
Adjust boring bar and put the corresponding screw that is disposed at expansion sleeve, make interior boring bar be in relaxed state, adjust screw mandrel, as adopting the form of adjusting the screw mandrel square toes, interior boring bar is stretched to the precalculated position, adjust corresponding expansion sleeve screw, make interior boring bar be in the state of holding tightly.
Must use torque spanner when adjusting the front expansion set screw of boring bar cover, prevent from being out of shape when interior boring bar from clamping excessive.When adjusting the balance shock piece, the balance shock piece is rotated to assigned address, adjusting nut 34 is fitted the end face of nut 34 and balance shock piece end face, so just the balance shock piece can be fixed to assigned address.The tightness of adjusting nut 34 can also be adjusted the rigidity of rubber ring, thereby adjusts damping parameter.
The state that the overhanging section of boring bar all stretched out in Fig. 7 had represented in the damping boring bar, according to Fig. 6 and Fig. 7, interior boring bar can be in the boring bar cover free-extension, thereby reach the adjustable purpose of rigidity.The interior boring bar position good damping result that overhangs, but a little less than the rigidity, boring bar cover rigidity is strong, can freely adjust stroke according to different processing works and different machine vibration situation.
The boring bar cover can also be flexible at boring bar support, and same processing length can be adjusted the ratio that overhangs of boring bar cover and interior boring bar.The balance shock piece is positioned at the retaining part rear end, and cutting force that not only can balance bare terminal end front side can also play damping effect to the lathe hold assembly.The balancing weight-reduction piece is comprised of several piece, can also can change clamping position according to the increase and decrease of difference cutting situation, adjusts rubber ring rigidity, thereby adjusts damping parameter.
In the Boring process, when heavy boring and half right boring, in order to improve working (machining) efficiency, boring cutter penetration of a cutting tool is larger, in the part that interior boring bar can be overhang this moment shortening or the boring bar cover of retracting fully.During right boring, boring cutter penetration of a cutting tool is very little, in order to improve machining accuracy, the part that interior boring bar can be overhang elongation.In the whole Boring Process, namely can adjust the rigidity of position, quantity and the rubber ring of balancing weight-reduction piece, can adjust again the rigidity of interior boring bar front end rubber ring, can also adjust the relative collapsing length of interior boring bar and boring bar cover, this programme can effectively solve the multiple deficiency of existing boring bar.
Claims (10)
1. damping boring bar, it is characterized in that, comprise boring bar cover and circumferentially constraint is axially directed in the interior boring bar of boring bar cover endoporus, and the boring bar driving mechanism of the length that overhangs of boring bar cover and the target locking device that boring bar and boring bar overlap in the locking that overhangs under the length that overhangs out in driving.
2. damping boring bar according to claim 1, it is characterized in that, the gripping section that described interior boring bar comprises for the overhanging section that extends boring bar length and is used for engaging with the boring bar cover, wherein overhanging section is hollow structure, the outer end is provided with the boring cutter seat, endoporus is provided with the main damping block coaxial with endoporus in boring cutter seat side, and all the other inner chambers of overhanging section are the liquid filler material chamber.
3. damping boring bar according to claim 2 is characterized in that, the end that the boring bar cover is different from damping block place end is provided with the balance shock piece coaxially.
4. damping boring bar according to claim 3, it is characterized in that, described balance shock piece comprises nut as matrix, be bonded on the external conical sleeve that has male cone (strobilus masculinus) on the nut periphery exterior feature and be enclosed within this external conical sleeve on and have the inner conical drogue of the inner conical surface identical with the male cone (strobilus masculinus) gradient, and be arranged on the secondary damping block on the inner conical drogue;
One of inner conical drogue and external conical sleeve are elastomer, are furnished with the locking nut of adjusting inner conical drogue axial location on external conical sleeve in the inner conical drogue wear side;
Accordingly, described boring bar cover respective end is provided with the spiro rod section that cooperates with described nut and locking nut.
5. according to claim 2 to 4 arbitrary described damping boring bars, it is characterized in that, described main damping block shows as at axial pouring weight broad in the middle and that reduce with the width of cloth to two ends, the covering surface rubber ring forms cylinder, be positioned at corresponding endoporus inner end, the other end is then held by described boring cutter seat by sealing ring, and the boring cutter seat is by the tolerance that bolt is fixing at interior boring bar and adjustment holds of axial arrangement.
6. damping boring bar according to claim 1, it is characterized in that, described locking device is the expansion sleeve that is bonded between interior boring bar and the boring bar cover, boring bar is enclosed within the position that is provided with expansion sleeve and has radial screw bore, the screw that cooperates with this screwed hole press the skewback that radially arranges by the top and with expansion sleeve on default wedge groove form wedge and cooperate, with the conversion of the part radial motion that matches with expansion sleeve for the skewback axially-movable.
7. damping boring bar according to claim 6 is characterized in that, the inner expension cap of described expansion sleeve and outer expansion set all are furnished with the wedge fit structure, and all is provided with axisymmetrically a pair of.
8. according to claim 6 or 7 described damping boring bars, it is characterized in that, described expansion sleeve is provided with a pair of.
9. damping boring bar according to claim 8 is characterized in that, described locking device also is included in the front expansion set of the port setting that overhangs of boring bar cover.
10. damping boring bar according to claim 1 is characterized in that, described driving mechanism is the screw screw mechanism, and accordingly, described interior boring bar is provided with the female seat of this screw screw mechanism, and corresponding lead screw shaft puts to being positioned at described boring bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320122009 CN203197289U (en) | 2013-03-18 | 2013-03-18 | Vibration reducing boring bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320122009 CN203197289U (en) | 2013-03-18 | 2013-03-18 | Vibration reducing boring bar |
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| CN203197289U true CN203197289U (en) | 2013-09-18 |
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| CN 201320122009 Expired - Fee Related CN203197289U (en) | 2013-03-18 | 2013-03-18 | Vibration reducing boring bar |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103121116A (en) * | 2013-03-18 | 2013-05-29 | 山东普利森集团有限公司 | Shock-absorbing boring bar |
| CN108637283A (en) * | 2018-07-20 | 2018-10-12 | 山东大学 | A kind of damping ring and application method for big overhanging boring cutter bar |
| CN110937133A (en) * | 2019-11-11 | 2020-03-31 | 浙江大学 | Vacuum adsorption electric control telescopic device with pressure monitoring function |
-
2013
- 2013-03-18 CN CN 201320122009 patent/CN203197289U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103121116A (en) * | 2013-03-18 | 2013-05-29 | 山东普利森集团有限公司 | Shock-absorbing boring bar |
| CN103121116B (en) * | 2013-03-18 | 2015-08-12 | 山东普利森集团有限公司 | Damping boring bar |
| CN108637283A (en) * | 2018-07-20 | 2018-10-12 | 山东大学 | A kind of damping ring and application method for big overhanging boring cutter bar |
| CN110937133A (en) * | 2019-11-11 | 2020-03-31 | 浙江大学 | Vacuum adsorption electric control telescopic device with pressure monitoring function |
| CN110937133B (en) * | 2019-11-11 | 2021-09-21 | 浙江大学 | Vacuum adsorption electric control telescopic device with pressure monitoring function |
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