CN101758253A - Method for reducing self-excited vibration of deep-hole processing boring bar and power vibration damping boring bar thereof - Google Patents
Method for reducing self-excited vibration of deep-hole processing boring bar and power vibration damping boring bar thereof Download PDFInfo
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- CN101758253A CN101758253A CN200910263580A CN200910263580A CN101758253A CN 101758253 A CN101758253 A CN 101758253A CN 200910263580 A CN200910263580 A CN 200910263580A CN 200910263580 A CN200910263580 A CN 200910263580A CN 101758253 A CN101758253 A CN 101758253A
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Abstract
The invention provides a method for reducing the self-excited vibration of a deep-hole processing boring bar, a vibration damper designed by utilizing the method for selecting parameters of the vibration damper has the advantages of simple structure and convenient detachment and can modify the parameters of the vibration damper of a power vibration damping boring cutter according to the needs at any time, the vibration damper consists of a vibration damping rod, damping fluid and rubber rings, and the vibration damper can effectively suppress the vibration during the processing. The method is realized through the following technical scheme: (1) establishing a theoretical model of a power vibration damping boring bar; (2) establishing a simulation model on the basis of the theoretical model and selecting the parameters of the vibration damper; (3) selecting finite element analysis software ANSYS and multi-body dynamics simulation software ADAMS for jointly establishing a dynamics simulation model of a vibration damping system and constituting a rigid-flexible coupling model; (4) designing a physical vibration damping boring bar model according to the models; and (5) selecting the vibration damping rod; and using the vibration damping rod with sheathed rubber rings at two ends and a boring bar inner hole for constituting the vibration damper, wherein the boring bar inner hole is arranged deep at one end and sealed by a plug, and the damping fluid is filled in the inner cavity of the boring bar inner hole.
Description
Technical field
The invention relates to the method that reduces the self-excited vibration of deep hole machining boring bar, especially reduce the method for Machining Small-deep Hole boring bar self-excited vibration, the invention still further relates to the power vibration damping boring bar of the manufacturing of this method of use.
Background technology
Deep hole machining is a recognized techniques difficult problem in the metal cutting field, has to sacrifice properties of product sometimes and adapts to the processing technology requirement.And the bottle chamber difficulty of processing of deep hole bottom is bigger, and the workpiece of deep hole bottle cavity configuration as shown in Figure 6 makes the diameter of boring bar be subjected to further restriction, and structure is subjected to bigger restriction.In the boring process in hole, draw ratio can not produce vibration less than 4 boring bar when the processing work.When the boring bar draw ratio when 4 are increased to 10, the rigidity of boring bar itself has not obviously reached the requirement of processing.In the boring process, because the effect of the cutting force that boring bar is continued, boring bar will produce self-excited vibration, and machining accuracy and surface quality are reduced.Reduce cutting data and can only reduce cutting force to a certain extent, thereby reduce the amplitude of vibration, but can cause labor productivity to reduce.Therefore in order to solve deep hole bottle chamber processing problems, Chinese scholars has all been carried out number of research projects.At deep hole bottle chamber part processing, many methods are arranged.Wherein a kind of is to adopt the power vibration damping boring cutter to carry out bore hole.[1] reported that 19～21 pages of " tool technique " magazine the 31st volumes in 1997 people such as Li Qitang is applied to boring bar vibration damping process with dynamic shock absorber, can effectively avoid the method for the generation of process flutter phenomenon.[2] 2003 Changchun Polytechnics Master's thesis " development of vibration damping knife bar and exploitation " set up the Mathematical Modeling of power vibration damping knife bar, shock absorber has been carried out theoretical optimization.[3] 2006 Harbin University of Science and Technology's Master's thesis " dynamics simulation and the parameter Optimization Analysis of deep hole machining power vibration damping boring bar " utilize Virtual Prototype Technique that the power vibration damping boring bar has been carried out simulation analysis and optimization.At present domestic most is carried out theory analysis and simulation analysis to the power vibration damping boring bar, and also not designing a cover can the actual boring bar of quoting, and is not verified in laboratory and on-the-spot processing.
Summary of the invention
The present invention seeks to propose a kind of boring bar and in working angles, absorb vibrational energy, suppress self-excited vibration, improve deep hole bottle chamber workpiece crudy, can effectively reduce or eliminate the method for deep hole machining boring bar self-excited vibration, especially reduce or eliminate the method and the power vibration damping boring cutter thereof of Machining Small-deep Hole boring bar self-excited vibration.
Purpose of the present invention can arrive by following measure.A kind of method that reduces the self-excited vibration of diameter deep hole machining boring bar that the present invention proposes is characterized in that comprising the steps,
(1) set up the theoretical model of power vibration damping boring bar, and it is optimized, initial value and preliminary structural design value are optimized; Set up vibration equation and damping model according to Theory of Vibration then;
(2) on theoretical model based, set up simulation model, and it is optimized.According to optimizing result of calculation design boring bar, select the shock absorber parameter for use, only need to be optimized calculating again by simulation model, just can obtain new shock absorber parameter, adjust dynamic shock absorber;
(3) select for use finite element analysis software ANSYS and the ADAMS of many-body dynamics simulation software to unite the dynamics simulation model of setting up vibration insulating system.In ANSYS the boring bar model is carried out grid and divide, obtain the mode of boring bar, the mnf file that will comprise boring bar mode imports among the ADAMS; In the ADAMS rigid body, couple together by node and beformable body, form hard and soft mixture model;
(4) according to above-mentioned modelling physics damping boring bar model;
(5) select vibration damper bar by the simulation optimization result; The vibration damper bar of rubber ring is overlapped at two ends, and deeply at one end by the plug sealing, inner chamber is full of the boring bar endoporus of damping fluid and forms shock absorber.
A kind ofly use the described power vibration damping boring bar that deep hole machining boring bar self-excited vibration method is made that reduces, has a boring bar that connects cutter head by screw, it is characterized in that, boring bar is the cylinder of a hollow belt blind hole, tubular damper that two ends are with annular rubber ring is housed in its hole and is sealed in damping fluid in the boring bar pore by plug.
The present invention has following beneficial effect than prior art.
The power vibration damping boring bar simulation model that utilizes the present invention on theoretical model based, to set up, select the shock absorber of shock absorber parameter designing for use, simple in structure, convenient disassembly, and can revise power vibration damping boring cutter shock absorber parameter at any time as required, can be optimized calculating again by simulation model very easily, obtain new shock absorber parameter, adjust dynamic shock absorber.By the shock absorber that vibration damper bar, damping fluid and rubber ring are formed, boring bar absorbs vibrational energy in working angles, realizes vibration damping.Effectively suppressed the vibration in the processing, power vibration damping boring cutter system that the passive type that provides is adjustable solves and has reduced the problem of deep hole bottle chamber processing boring bar self-excited vibration, has improved the quality of deep hole bottle chamber processing.
The present invention adopts Virtual Prototype Technique, uses simulation model design physical model, has significantly reduced the research and development time of boring bar, and has been the adjustment of follow-up shock absorber parameter, and simulation model is provided, and has enlarged the range of application of damping boring bar.Purpose of the present invention is compared with common boring bar at the power vibration damping boring bar of the special use of deep hole bottle chamber Element Design, and the work in-process effectiveness in vibration suppression is relatively good, cutter relieving do not occur.
Description of drawings
In order more to be expressly understood the present invention, now will simultaneously with reference to accompanying drawing, the present invention be described by the embodiment of the invention, wherein:
Fig. 1 is the method flow diagram that the present invention reduces the self-excited vibration of deep hole machining boring bar.
Fig. 2 is the schematic diagram of the mechanical model of the inventive method theoretical model of setting up the power vibration damping boring bar.
Fig. 3 is a power vibration damping boring bar amplitude frequency curve schematic diagram of the present invention.
The comparison diagram of the amplitude-frequency response that Fig. 4 records when being power vibration damping boring cutter of the present invention and common boring cutter bore hole.
Fig. 5 is the organigram of power vibration damping boring bar of the present invention.
Among the figure: 1 boring bar, 2 damping blocks, 3 rubber rings, 4 damping fluids, 5 plugs, 6 cutter heads, 7 blades, 8 blade screws, 9 screws, 10 screws, 11 cooling fluid hole technology plugs.
The specific embodiment
Consult Fig. 1, Fig. 2.According to the present invention, set up the theoretical model of power vibration damping boring bar, and it is optimized, initial value and preliminary structural design value are optimized.On theoretical model based, set up simulation model then, and it is optimized.According to optimizing result of calculation design boring bar, select the shock absorber parameter for use at last.If need to revise power vibration damping boring cutter shock absorber parameter, can be optimized calculating again by simulation model, obtain new shock absorber parameter, adjust dynamic shock absorber.
1) during theoretical model, dynamic shock absorber can be simplified to binary vibrational system.By mechanical model shown in Figure 2 damping model is set.Wherein, m2 is the vibration damper bar quality, and k2 is a rubber perfect elasticity coefficient, and c is the desirable damped coefficient of damping fluid.The system that m1, k1 form is referred to as main system, and the vibration absorber of being made up of m2, k2 and c is referred to as shock absorber.Set up vibration equation according to Theory of Vibration
If
Be the natural frequency of main system,
Be the natural frequency of shock absorber, μ=m
2/ m
1Be the ratio of shock absorber quality with the main system quality,
Ratio of damping for shock absorber.Proper
The time maximum vibration amplitude minimum.
2) simulation model.
Select for use finite element analysis software ANSYS and the ADAMS of many-body dynamics simulation software to unite the dynamics simulation model of setting up vibration insulating system.In ANSYS, the boring bar model is carried out grid and divide, obtain the mode of boring bar.The mnf file that will comprise boring bar mode then imports among the ADAMS.Rigid body can couple together by node and beformable body in ADAMS, thereby forms hard and soft mixture model.The dynamic shock absorber simulation model can be by ADAMS the optimization analysis, can optimize shock absorber coefficient of elasticity and damped coefficient, make effectiveness in vibration suppression the best of boring bar.Obtain amplitude-frequency response after the optimization, power vibration damping boring bar amplitude frequency curve as shown in Figure 3.Curve 1 is common boring bar amplitude-frequency oscillating curve among the figure, and curve 2 is a power vibration damping boring bar amplitude frequency curve, and the vibration amplitude of visible power vibration damping boring bar has obviously reduced.Reaching 13.7 such as present embodiment at deep hole bottle chamber Element Design one cover boring bar draw ratio (overhangs and is 185mm, diameter is 13.5mm) the power vibration damping boring bar, another set of boring bar draw ratio is 12.2 (to overhang and be 658mm, diameter is 54mm) the power vibration damping boring bar, the comparison diagram of the amplitude-frequency response that records from its power vibration damping boring cutter shown in Figure 4 and common boring cutter bore hole.As seen, be 140r/min at rotating speed, cutting depth 0.4mm under the cutting parameter of amount of feeding 0.1mm/r, has apparent in view effectiveness in vibration suppression.Curve 1 is the amplitude-frequency response of common boring bar among the figure, and curve 2 is the amplitude-frequency response of power vibration damping boring cutter.This shows that power vibration damping boring bar amplitude has lowered.
When actual boring, can reset parameter easily and be optimized by the simulation model of setting up above, change the parameter of shock absorber, to reach the better damping effect.For improving the quality of vibration damper bar, can in software dialogue box, revise the coefficient of elasticity and the damped coefficient of shock absorber.Therefore, revise the parameter of shock absorber if desired, only need in software dialogue box, revise corresponding value, utilize simulation model to be optimized design again then, obtain new shock absorber parameter, select suitable vibration damper bar according to these parameters, damping and rubber ring are so that reach reasonable effectiveness in vibration suppression.
The damper structure design, the result selects vibration damper bar according to simulation optimization, damping fluid and rubber ring.Vibration damper bar can be selected the W-Co kind carbide alloy for use, and damping fluid can be selected dimethicone for use, and rubber ring can be selected natural rubber for use, and HS is 10～60.By the shock absorber that vibration damper bar, damping fluid and rubber ring are formed, boring bar absorbs vibrational energy and realizes vibration damping in working angles.The present invention structurally is for convenience detach, has designed interchangeable cutter head and special vibration damper bar structure.
Consult Fig. 5.Power vibration damping boring bar 1 is the cylinder of a hollow belt blind hole, and vibration damper bar is shaped on screwed hole near the cutter head end, so as during dismounting with in the screw precession screwed hole.Cutter head structure partly adopts the taper bolt of convenient location and dismounting to fix.The vibration damper bar two ends are shaped on the fixedly groove of rubber ring, and rubber ring can pull out with vibration damper bar when for convenience detach.Vibration damper bar is contained in boring bar 1 hole that is full of damping fluid.Two ends collar-shaped rubber ring vibration damper bar 2 is contained in the cavity of boring bar 1 end, with boring bar certain clearance is arranged, and the damping fluid that the inner chamber of boring bar 1 is full of can be a dimethicone 4, and the inner chamber other end is sealed by plug 5.Can vibration damper bar be pulled out by screw, cutter head 6 is fixed on the boring bar head by screw 9,10.Cutter head 6 is interchangeable cutter head, so that process other deep hole parts as required, and expansion power vibration damping boring bar function.Blade 7 is installed on the cutter head, and is fixing by blade screw 8.Boring bar 1 is provided with cooling fluid hole technology plug 11.
During use, the power vibration damping boring bar can stretch into from the hole of deep hole bottle chamber workpiece φ 20mm, after arrival deep hole bottle chamber waits to add machining area, because after the penetration of a cutting tool, boring bar 1 vibrates.Vibration damper bar 2 also vibrates, and has absorbed most energy of boring bar vibration, thereby reaches the effect of vibration damping.In bite is 0.5mm, and the speed of mainshaft is 105r/min, and when feed speed was 0.12mm, the dimensional accuracy of machining hole can reach IT12, and roughness is Ra3.2.
Claims (9)
1. a method and a power vibration damping boring bar thereof that reduces the self-excited vibration of deep hole machining boring bar is characterized in that comprising the steps,
(1) set up the theoretical model of power vibration damping boring bar, and it is optimized, initial value and preliminary structural design value are optimized; Set up vibration equation and damping model according to Theory of Vibration then;
(2) on theoretical model based, set up simulation model, and it is optimized.According to optimizing result of calculation design boring bar, select the shock absorber parameter for use, only need to be optimized calculating again by simulation model, just can obtain new shock absorber parameter, adjust dynamic shock absorber;
(3) select for use finite element analysis software ANSYS and the ADAMS of many-body dynamics simulation software to unite the dynamics simulation model of setting up vibration insulating system.In ANSYS the boring bar model is carried out grid and divide, obtain the mode of boring bar, the mnf file that will comprise boring bar mode imports among the ADAMS; In the ADAMS rigid body, couple together by node and beformable body, form hard and soft mixture model;
(4) according to above-mentioned modelling physics damping boring bar model;
(5) select vibration damper bar by the simulation optimization result; The vibration damper bar (2) of rubber ring (3) is overlapped at two ends, and deeply at one end by plug (5) sealing, inner chamber is full of boring bar (1) endoporus of damping fluid and forms shock absorber.
2. the method that reduces the self-excited vibration of deep hole machining boring bar as claimed in claim 1 is characterized in that, when theorizing model, dynamic shock absorber is simplified to binary vibrational system.
3. the method that reduces the self-excited vibration of deep hole machining boring bar as claimed in claim 1 or 2 is characterized in that, is the vibration damper bar quality with m2, and k2 is a rubber perfect elasticity coefficient, and c is the desirable damped coefficient of damping fluid.M1, k1 form main system, and m2, k2 and c form damper means.
4. the method that reduces the self-excited vibration of deep hole machining boring bar as claimed in claim 2 is characterized in that, sets up vibration equation according to Theory of Vibration
If
Be the natural frequency of main system,
Be the natural frequency of shock absorber, μ=m
2/ m
1Be the ratio of shock absorber quality with the main system quality,
Be the ratio of damping of shock absorber,
The time maximum vibration amplitude minimum.
5. the method that reduces the self-excited vibration of deep hole machining boring bar as claimed in claim 1 is characterized in that, analyzes the dynamic shock absorber simulation model with the ADAMS software optimization, optimizes shock absorber coefficient of elasticity and damped coefficient, optimizes to draw amplitude-frequency response.
6. one kind is used the described power vibration damping boring bar that deep hole machining boring bar self-excited vibration method is made that reduces, has a boring bar that connects cutter head by screw, it is characterized in that, boring bar (1) is the cylinder of a hollow belt blind hole, tubular damper that two ends are with annular rubber ring (3) is housed in its hole and is sealed in damping fluid (4) in boring bar (1) pore by plug (5).
7. power vibration damping boring bar as claimed in claim 6, it is characterized in that, described vibration damper bar is contained in boring bar (1) hole that is full of damping fluid, vibration damper bar is shaped on screwed hole near the cutter head end, two ends are shaped on the fixedly groove of rubber ring, the vibration damper bar (2) of two ends collar-shaped rubber rings (3) is contained in the cavity of boring bar (1) end
8. as claim 1 or 6 described power vibration damping boring bars, it is characterized in that the damping fluid that the inner chamber of boring bar (1) is full of is dimethicone (4).
9. as claim 1 or 6 described power vibration damping boring bars, it is characterized in that boring bar (1) is provided with cooling fluid hole technology plug (11).
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| CN102672217A (en) * | 2012-05-24 | 2012-09-19 | 山东大学 | Coating damping cutter rod and damping testing method thereof |
| CN103699704A (en) * | 2012-09-27 | 2014-04-02 | 简式国际汽车设计（北京）有限公司 | Simulation analysis method of mechanical system |
| CN105005671A (en) * | 2015-07-30 | 2015-10-28 | 中航沈飞民用飞机有限责任公司 | Dynamics simulation analysis method of uniformly distributed load bearing system |
| CN106934089A (en) * | 2015-12-31 | 2017-07-07 | 沪东重机有限公司 | A kind of damped coefficient check method of fluid pressure type longitudinal vibration damper |
| CN107335821A (en) * | 2017-06-07 | 2017-11-10 | 燕山大学 | A kind of double freedom power vibration damping boring bar |
| US9855611B2 (en) | 2015-08-31 | 2018-01-02 | Kennametal Inc. | Toolholder with viscous fluid inertial mass damper |
| CN108376209A (en) * | 2018-05-10 | 2018-08-07 | 北京新能源汽车股份有限公司 | Modeling method and modeling system for shock absorber |
| CN108386486A (en) * | 2018-05-23 | 2018-08-10 | 西安交通大学 | A kind of variation rigidity single-degree-of-freedom power vibration damping boring bar |
| CN109317706A (en) * | 2017-07-31 | 2019-02-12 | 田中金属加工（上海）有限公司 | A kind of deep hole machining damping boring cutter bar for numerically controlled lathe |
| PL423999A1 (en) * | 2017-12-21 | 2019-04-08 | Politechnika Świętokrzyska | Tool holder |
| JP2019531202A (en) * | 2016-08-31 | 2019-10-31 | エムエーキュー アーベー | Rotatable assembly, machining bar assembly and method thereof |
| CN115070096A (en) * | 2022-08-16 | 2022-09-20 | 成都航空职业技术学院 | Vibration reduction method of milling cutter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102672217A (en) * | 2012-05-24 | 2012-09-19 | 山东大学 | Coating damping cutter rod and damping testing method thereof |
| CN103699704A (en) * | 2012-09-27 | 2014-04-02 | 简式国际汽车设计（北京）有限公司 | Simulation analysis method of mechanical system |
| CN105005671A (en) * | 2015-07-30 | 2015-10-28 | 中航沈飞民用飞机有限责任公司 | Dynamics simulation analysis method of uniformly distributed load bearing system |
| US9855611B2 (en) | 2015-08-31 | 2018-01-02 | Kennametal Inc. | Toolholder with viscous fluid inertial mass damper |
| CN106934089A (en) * | 2015-12-31 | 2017-07-07 | 沪东重机有限公司 | A kind of damped coefficient check method of fluid pressure type longitudinal vibration damper |
| JP2019531202A (en) * | 2016-08-31 | 2019-10-31 | エムエーキュー アーベー | Rotatable assembly, machining bar assembly and method thereof |
| CN107335821A (en) * | 2017-06-07 | 2017-11-10 | 燕山大学 | A kind of double freedom power vibration damping boring bar |
| CN109317706A (en) * | 2017-07-31 | 2019-02-12 | 田中金属加工（上海）有限公司 | A kind of deep hole machining damping boring cutter bar for numerically controlled lathe |
| PL423999A1 (en) * | 2017-12-21 | 2019-04-08 | Politechnika Świętokrzyska | Tool holder |
| CN108376209A (en) * | 2018-05-10 | 2018-08-07 | 北京新能源汽车股份有限公司 | Modeling method and modeling system for shock absorber |
| CN108386486A (en) * | 2018-05-23 | 2018-08-10 | 西安交通大学 | A kind of variation rigidity single-degree-of-freedom power vibration damping boring bar |
| CN108386486B (en) * | 2018-05-23 | 2019-11-08 | 西安交通大学 | A kind of variation rigidity single-degree-of-freedom power vibration damping boring bar |
| CN115070096A (en) * | 2022-08-16 | 2022-09-20 | 成都航空职业技术学院 | Vibration reduction method of milling cutter |
| CN115070096B (en) * | 2022-08-16 | 2022-10-25 | 成都航空职业技术学院 | Vibration reduction method for milling cutter |
| CN115740525A (en) * | 2022-12-13 | 2023-03-07 | 大连理工大学 | Flexible vibration suppression device and adaptive vibration suppression method for long overhanging turning tool |
| CN115740525B (en) * | 2022-12-13 | 2023-08-04 | 大连理工大学 | Flexible vibration suppression device and adaptive vibration suppression method for long overhanging turning tool |
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Open date: 20100630 |