CN104607704A - Impact vibration absorption type milling cutter bar - Google Patents
Impact vibration absorption type milling cutter bar Download PDFInfo
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- CN104607704A CN104607704A CN201510059651.2A CN201510059651A CN104607704A CN 104607704 A CN104607704 A CN 104607704A CN 201510059651 A CN201510059651 A CN 201510059651A CN 104607704 A CN104607704 A CN 104607704A
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- cutter
- axle
- impact damper
- milling cutter
- damper system
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
The invention discloses an impact vibration absorption type milling cutter bar. The impact vibration absorption type milling cutter bar comprises a cutter holder, a vibration absorption tray, a mass block, a mandrel component and a cutter body, wherein the head part of the cutter body is provided with an empty cavity, the tail part of the cutter body is provided with an inner hole and a connector, and the middle of the cutter body is axially provided with an inner hole; the mandrel passes through the axial inner hole in the middle of the cutter body, and is positioned by the inner hole in the tail part; the mass block is arranged in the empty cavity in the cutter head, and is positioned between a small end of the mandrel and the external circle of the cutter holder; the vibration absorption tray is fixedly connected with the empty cavity in the head part of the cutter body; an arc groove is formed in one side of the vibration absorption tray, and is used for accommodating the mass block, and a blind hole is formed in the other side of the vibration absorption tray, and is internally filled with a strong permanent magnet; the mass block is adsorbed to the vibration absorption tray by the permanent magnet; the cutter holder is fixedly connected with the empty cavity of the cutter body; the top end of the cutter holder is provided with an end link for the installation of a milling cutter and transmitting the cutting torque of the milling cutter. The impact vibration absorption type milling cutter bar can effectively inhibit the vibration phenomenon of a long overhang cutter, and is suitable for processing deep-hole and deep-cavity structural components.
Description
Technical field
The present invention relates to a kind of impact damper system formula cutter bar of milling cutter, be specifically related to the Boring Bar in a kind of metal Milling Processes, belong to Machining Technology field.
Background technology
In metal cutting process, between cutter and workpiece, usually there will be chatter phenomenon.Flutter affects machining accuracy, reduces lathe and cutting-tool's used life, and meanwhile, flutter, also along with noise, pollutes processing environment.The elimination of flutter, can also by improving rigidity, the damping realization of tooling system or lathe except selecting suitable cutting parameter.Damper being applied to milling cutter is a kind of well chattering elimination scheme.
Damper is mainly divided into initiatively, half active and passive three kinds of forms.Initiatively and the damper of half active form usually need the supply of extra power, complicated control algolithm and larger space, and milling cutter due to motion state and space constraint passive damping device is compared initiatively, half active is easier realizes on milling cutter.
Passive damping device is divided into again tuner-type, impact type, eddy current type, electromagnetic type, friction-type etc.The features such as wherein impact type has structure simple relative to other several passive damping utensils, easy to adjust.Impact type damping device usually has larger mass ratio, and thus effectiveness in vibration suppression is good, but is in High Rotation Speed state due to milling cutter, the bias of mass can produce huge centrifugal force, thus make milling cutter unstability, make damper lose effectiveness in vibration suppression, cause potential safety hazard.The eccentricity issues solving mass is one of impact type damper technological difficulties in long overhanging vibration damping milling cutter application.
Summary of the invention
The object of the invention is to solve the problem, proposing a kind of impact damper system formula cutter bar of milling cutter, to eliminate the chatter phenomenon in Milling Process, improve metal cutting quality.The present invention utilizes impact principle dissipate vibrational energy to improve metal removal efficiency, reduces part to be processed surface roughness.
A kind of impact damper system formula cutter bar of milling cutter, comprises tool rest, vibration damping pallet, mass, arbor assembly, cutter hub;
Cutter head body is provided with cavity, and afterbody is provided with interface, and middle part is axially arranged with endoporus, and cutter hub endoporus rear end is also provided with cutter tail endoporus, cutter tail endoporus and orifice;
Arbor assembly comprises axle, and one end of axle is small end, and the other end is large end, and the small end of axle is arranged in cutter head body cavity, and the large end of axle is fixed in cutter tail endoporus, and axle is through axial bore in the middle part of cutter hub;
Mass is inserted in cutter head inner chamber, between the small end and tool rest cylindrical of axle;
Vibration damping pallet is fixedly connected with cutter head body cavity, and vibration damping pallet side is provided with arc groove, and arc groove is for placing mass, and opposite side is provided with blind hole, and blind hole is for filling strong permanent magnetic iron, and ferromagnetics mass is adsorbed on vibration damping pallet by permanent magnet;
Tool rest is fixedly connected with by screw thread with the cavity of cutter hub, and tool rest top is provided with end key, for installing cutterhead.
The invention has the advantages that:
(1) no matter cutter rotating speed just, effectively can suppress the cutter chatter phenomenon in Milling Process, be applicable to various dark chamber, the processing of deep-hole parts a kind of impact type vibration damping of the present invention cutter bar of milling cutter;
(2) a kind of impact type vibration damping of the present invention cutter bar of milling cutter structure is simple, and without the need to tuning, the optimization of effectiveness in vibration suppression mainly relies on changes supporting damping base and mass realization;
(3) a kind of impact type vibration damping of the present invention cutter bar of milling cutter long service life, damping mechanism is made up of cheap material, and without the need to hermetically-sealed construction, working service is with low cost.
Accompanying drawing explanation
Fig. 1 is the axial sectional view of the present invention;
Fig. 2 is front view of the present invention;
Fig. 3 is left view of the present invention;
Fig. 4 is right view of the present invention;
Fig. 5 is the axial sectional view of vibration damping pallet of the present invention;
Fig. 6 is vibration damping pallet left view of the present invention.
In figure:
1-tool rest 2-vibration damping pallet 3-mass
4-arbor assembly 5-cutter hub 101-tool rest internal thread hole
Cylindrical 103-at the bottom of 102-seat holds key
201-permanent magnet 202-hexagonal counter sink 203-pallet external screw thread
204-arc groove
401-hex nut 402-check washer 403-axle small end
404-axle large end 405-hexagonal counter sink 406-axle
501-cutter head cavity 502-cutter tail endoporus 503-Capto interface
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
The present invention is a kind of impact damper system formula cutter bar of milling cutter, axially analyses and observe as shown in Figure 1, and front view, left view, right view are respectively as shown in Figure 2,3, 4;
A kind of impact damper system formula cutter bar of milling cutter, comprises tool rest 1, vibration damping pallet 2, mass 3, arbor assembly 4, cutter hub 5.
Cutter hub 5 head is provided with cavity 501, and afterbody is provided with Capto interface 503, and middle part is axially arranged with endoporus, for installing axle 406; Cutter hub 5 endoporus rear end is also provided with threaded cutter tail endoporus 502, and cutter tail endoporus 502 is communicated with Capto interface 503; Cavity 501 is for installing vibration damping pallet 2, mass 3, hex nut 401 and lock washer 402; Cutter tail endoporus 502 is for the installation of arbor assembly 4.
Arbor assembly 4 comprises hex nut 401, check washer 402, hexagonal counter sink 405, axle 406;
One end of axle 406 is small end 403, the other end is large end 404, axle 406 afterbody is provided with hexagonal counter sink 405, the small end 403 of axle 406 is inserted by the endoporus of Capto interface 503, use outer hexagonal spanner, by hexagonal counter sink 405, the large end 404 of axle 406 is screwed in cutter tail endoporus 502 bottom, axle 406 is through axial bore in the middle part of cutter hub 5, the small end 403 of axle 406 enters cutter hub 5 head cavity 501, the small end 403 of axle 406 is fixed by hex nut 401, check washer 402 is provided with between hex nut 401 and cutter hub 5, the large end 404 of axle 406 is fixed by cutter tail endoporus 502, hex nut 401 can provide suitable compression for cutter hub 5, and suitable compression can significantly improve cutter hub rigidity, reduces the Oscillation Amplitude of cutter hub.
After arbor assembly 4 installs, mass 3 is inserted cutter head inner chamber 501;
As Fig. 5, shown in Fig. 6, vibration damping pallet 2 comprises permanent magnet 201, hexagonal counter sink 202, pallet external screw thread 203, arc groove 204, vibration damping pallet 2 side is provided with arc groove 204, arc groove 204 is for placing mass 3, opposite side is provided with blind round hole, blind-hole bottom has interior hexagonal counter sink 202, be circumferentially with pallet external screw thread 203, blind hole is used for the installation of permanent magnet 201, the interior hexagonal counter sink 202 of blind-hole bottom, used by vibration damping pallet 2 outer hexagonal spanner to pass through hexagonal counter sink 202 and screw in cutter hub 5 head endoporus, pallet external screw thread 203 coordinates with tool rest internal thread hole 101, thus seal mass 3.Permanent magnet 201 is pressed into vibration damping pallet after this to be adsorbed on vibration damping pallet 2 by mass 3.Permanent magnet 201 provides suitable restoring force for giving mass 3, prevents the stability of the long-time Influence from Eccentric milling cutter extension bar of mass 3;
Tool rest 1 and cutter hub 5 are with right-handed thread 102 tight fit connection.Tool rest 1 top has for the fixing end key 103 of cutterhead and tool rest internal thread hole 101, and tool rest 1 bottom is provided with the cylindrical for connecting cutter hub 5, and tool rest 1 is located on cutter hub 5 with end face.
Described tool rest 1 is made up of steel or carbide alloy, holds the running part of key 103 to select according to GB/T613-93 at its upper end.Outside diameter at the bottom of tool rest 1 is 65% ~ 70% of cutter hub 5 head diameter, and cylindrical and cutter head body are by screw thread tight fit connection.
Described cutter hub 5 is made up of tool steel or carbide alloy, is provided with 3 ° of cone angles.Cutter hub 5 head endoporus and cylindrical bottom tool rest 1 are by being threaded, and cutter hub 5 afterbody Captio interface 503 performs ISO26623-1 standard.Cutter hub 5 internal cavities is provided with the installation of endoporus for axle 406, and cutter hub 5 endoporus afterbody is provided with the axial restraint of cutter tail endoporus 502 for axle 406.
Described vibration damping pallet 2 is made up of the non-ferromagnetic material such as copper or aluminium material, and vibration damping pallet 2 is provided with arc groove 204 in one end, for the radial location of circular mass 3, and the centre of gravity adjustment of the inclination angle foundation mass 3 of arc groove 204.Vibration damping pallet 2 other end has blind round hole for the installation of permanent magnet 201, and blind hole is used for providing of the radial restoring force of mass 3.Blind-hole bottom has interior hexagonal counter sink 202, for the installation of vibration damping pallet 2 in axle 406.
Described mass 3 is circular metal ball, and material is wolfram steel.Mass 3 is adsorbed by the permanent magnet 201 of vibration damping pallet 2, is located by arc groove 204.Mass 3 leaves the gap of about 2mm with the small end 403 of axle 406, and mass 3 and cutter hub 5 inwall minimum clearance are about 0.1mm, and the numerical basis hammering experiment in concrete gap is determined.The object of gap numerical evaluation is adjustment impact damper effectiveness in vibration suppression, maximizes the vibration attenuation rate of cutter bar of milling cutter.
In described arbor assembly 4, hex nut 401 material is steel, is installed on the small end 403 of axle 406, for providing of cutter hub 5 pretightning force; Axle 406 material is steel, and have large end 404 and small end 403, two ends are equipped with screw thread, and small end 403 screw thread coordinates with pretension hex nut 401, and large end 404 screw threads are used for the location of axle 406 in cutter hub 5, cooperation.
Milling arbor installs facing cutter when carrying out Milling Process, the blades in rotation incision machined material on cutterhead, and due to blade and the interaction of material, thus milling arbor is subject to the effect of periodicity side knock perturbed force.Because high length-diameter ratio cutter is typical weak separation, low resistance parts, knife bar is difficult to rely on own material damping damped vibration at short notice, thus produces vibration by a relatively large margin.Described impact type Boring Bar can still ensure higher rigidity and damping characteristic under 8 times of draw ratio conditions, thus the efficient stable realizing dark cavity configuration part cuts.
When described impact damper system knife bar receives lateral impact forces, because knife bar single order mode is curved mode, the vibration of knife bar 5 causes primarily of transverse deformation.Improve the rigidity of cutter hub 5, the transversely deforming reducing cutter hub 5 is one of effective way suppressing cutter hub cutting vibration.The innovation of described impact damper system knife bar is that cutter hub internal mandrel 406 is applied, and axle 406 both can be provided for the compression promoting cutter hub 5 rigidity, also produced Coulomb friction damping by the friction between cutter hub center bore inner wall.Described impact damper system knife bar applies suitable pretightning force first to before use arbor assembly 4, the effect that arbor assembly 4 receives tension applies certain compression to cutter hub 5 conversely, cutter hub produces the compression of trace, according to material mechanics principle, the effect of compression can be larger strengthening cutter hub static rigidity, and the fatigue strength of cutter hub can be improved, thus effectively reduce the Relative Vibration deformation quantity of unit lateral impact loading effect lower knife body 5.
The vibration amplitude of cutter hub 5 mainly affects by rigidity and damping two conditions, the damping improving cutter hub 5 is another effective way reducing the vibration of long overhanging milling cutter, knife bar 5 and mandrel component 4 are coaxially installed, the deformation of knife bar 5 must cause the synchronous deformation of axle 406, hold greatly due to axle 406 and retrain by screw thread, axle deformation quantity is less relative to knife bar, thus axle 406 knife bar 5 endoporus generation axial slip relatively, again because the impact of compression, therebetween huge Coulomb friction damping is produced, thus the huge vibrational energy that can dissipate in the shorter time, promote the dynamic rate of cutter hub 5.
Impact damper belongs to the one of passive damping device, and impact damper utilizes collision principle to consume vibrational energy, impact damper have structure simple, without the need to the feature such as tuning, quality is large.Utilize impact damper can reduce the intrinsic frequency of knife bar, prevent the periodicity covibration that in cutter at high speeds rotary course, cutting force causes.Due to the randomness of traditional impact damper impact mass block position, impact mass block easily causes the bias of cutter, causes larger eccentric force when High Rotation Speed, causes cutter unstability, causes potential safety hazard, therefore is difficult to apply in high speed rotating tool.The innovation of described impact damper system cutter bar of milling cutter is the specially designed self-centering impact damper of built-in one (vibration damping pallet 2, mass 3 form damper), the torque of this impact damper by the generation of given shape vibration damping pallet 2 and the synergy of electromagnetic force, effectively can prevent the long-time bias of impact mass block in cutter rotary course.When knife bar receives impact loading, spherical mass 3 due to self inertia effect arcuately groove 204 roll, and there is continuous inelastic collision with the inwall of cutter head cavity 501, when the centre of sphere of mass 4 departs from knife bar axis, under the synergy of the magnetic field force applied at gravity and permanent magnet 201, the effect of an additional moment is subject to by the known mass 3 of mechanical analysis, the action effect of this moment just makes mass return cutter spindle line position, and the size of restoring moment freely can be changed by the curvature changing arc groove 204.The use of permanent magnet 201 can ensure that this restoring moment is not lost, even when knife bar rotating shaft is perpendicular to horizontal plane because of the locus change of knife bar.
Claims (10)
1. an impact damper system formula cutter bar of milling cutter, comprises tool rest, vibration damping pallet, mass, arbor assembly, cutter hub;
Cutter head body is provided with cavity, and afterbody is provided with interface, and middle part is provided with axial bore, and cutter hub endoporus rear end is also provided with cutter tail endoporus, cutter tail endoporus and orifice;
Arbor assembly comprises axle, and one end of axle is small end, and the other end is large end, and the small end of axle is arranged in cutter head body cavity, and the large end of axle is fixed in cutter tail endoporus, and axle is through axial bore in the middle part of cutter hub;
Mass is inserted in cutter head inner chamber, between the small end and tool rest cylindrical of axle;
Vibration damping pallet is fixedly connected with cutter head body cavity, and vibration damping pallet side is provided with arc groove, and arc groove is for placing mass, and opposite side is provided with blind hole, and blind hole is for filling strong permanent magnetic iron, and ferromagnetics mass is adsorbed on vibration damping pallet by permanent magnet;
Tool rest is fixedly connected with by screw thread with the cavity of cutter hub, and tool rest top is provided with end key, installs for cutterhead.
2. a kind of impact damper system formula cutter bar of milling cutter according to claim 1, the small end of described axle is fixed by hex nut, is provided with check washer between hex nut and cutter hub.
3. a kind of impact damper system formula cutter bar of milling cutter according to claim 1, described tool rest is made up of tool steel or carbide alloy, holds the running part of key to select according to GB/T613-93 at its upper end.
4. a kind of impact damper system formula cutter bar of milling cutter according to claim 1, at the bottom of described tool rest seat, outside diameter is 65% ~ 70% of cutter head body diameter, and cylindrical is connected with cutter head body cavity.
5. a kind of impact damper system formula cutter bar of milling cutter according to claim 1, described cutter hub is made up of tool steel or carbide alloy, is provided with 3 ° of cone angles.
6. a kind of impact damper system formula cutter bar of milling cutter according to claim 1, the afterbody interface of described cutter hub performs ISO26623-1 standard.
7. a kind of impact damper system formula cutter bar of milling cutter according to claim 1, described vibration damping pallet is made up of non-ferromagnetic material material.
8. a kind of impact damper system formula cutter bar of milling cutter according to claim 1, described permanent magnet adopts Ru-Fe-Mn material to make.
9. a kind of impact damper system formula cutter bar of milling cutter according to claim 1, the degree of depth of the arc groove of described vibration damping pallet is 0.29 times of diameter.
10. a kind of impact damper system formula cutter bar of milling cutter according to claim 1, described mass 3 is circular metal ball, and material is wolfram steel, and metal ball and cutter hub inwall minimum clearance are 0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510059651.2A CN104607704B (en) | 2015-02-04 | 2015-02-04 | A kind of impact damper system formula cutter bar of milling cutter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510059651.2A CN104607704B (en) | 2015-02-04 | 2015-02-04 | A kind of impact damper system formula cutter bar of milling cutter |
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| CN104607704A true CN104607704A (en) | 2015-05-13 |
| CN104607704B CN104607704B (en) | 2017-03-29 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106363198A (en) * | 2016-11-07 | 2017-02-01 | 东南大学 | Dynamic vibration attenuation boring tool |
| CN106424781A (en) * | 2016-11-16 | 2017-02-22 | 黑龙江省经济管理干部学院 | Damping boring tool with inner rotating vibration absorbers |
| CN107614174A (en) * | 2015-05-21 | 2018-01-19 | 京瓷株式会社 | Knife rest, cutting element and the manufacture method using its machining thing |
| CN109128321A (en) * | 2018-11-23 | 2019-01-04 | 哈尔滨理工大学 | A kind of slotting cutter bar of milling cutter of intelligence |
| CN110355410A (en) * | 2019-06-19 | 2019-10-22 | 哈尔滨理工大学 | A kind of plug in milling arbor of impact type vibration damping |
| CN114192855A (en) * | 2021-12-02 | 2022-03-18 | 北京航空航天大学 | Vibration reduction milling cutter |
| 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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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107614174A (en) * | 2015-05-21 | 2018-01-19 | 京瓷株式会社 | Knife rest, cutting element and the manufacture method using its machining thing |
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| CN106424781A (en) * | 2016-11-16 | 2017-02-22 | 黑龙江省经济管理干部学院 | Damping boring tool with inner rotating vibration absorbers |
| CN106424781B (en) * | 2016-11-16 | 2018-08-17 | 哈尔滨理工大学 | A kind of damping boring cutter with built-in rotation bump leveller |
| CN109128321A (en) * | 2018-11-23 | 2019-01-04 | 哈尔滨理工大学 | A kind of slotting cutter bar of milling cutter of intelligence |
| CN110355410A (en) * | 2019-06-19 | 2019-10-22 | 哈尔滨理工大学 | A kind of plug in milling arbor of impact type vibration damping |
| CN114192855A (en) * | 2021-12-02 | 2022-03-18 | 北京航空航天大学 | Vibration reduction milling cutter |
| 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 |
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