CN201922058U - Boring rod structure based on two-stage tuned mass damper for vibration damping - Google Patents
Boring rod structure based on two-stage tuned mass damper for vibration damping Download PDFInfo
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- CN201922058U CN201922058U CN2010206410825U CN201020641082U CN201922058U CN 201922058 U CN201922058 U CN 201922058U CN 2010206410825 U CN2010206410825 U CN 2010206410825U CN 201020641082 U CN201020641082 U CN 201020641082U CN 201922058 U CN201922058 U CN 201922058U
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- damper
- boring
- damped oscillator
- spring
- support bar
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Abstract
The utility model relates to a boring rod structure based on a two-stage tuned mass damper for vibration damping, which belongs to the technical field of vibration damping of dampers. The boring rod structure comprises a boring rod; an inner hole is arranged at the front end of the boring rod, and a first support rod, a second support rod, a first damping vibrator, a second damping vibrator, a damper cover and a fader are arranged in the inner hole; and an adjusting screw penetrates the hole wall of the boring rod and pushes against the fader, a spring and a spring washer are arranged between the fader and the damper cover in sequence, and the spring washer is in contact with the damper cover through the action of the spring. As for the boring rod structure, the fader is used for pushing the spring, thereby being capable of mediating and controlling the compression amount of the spring, further adjusting the contact force between the spring washer and a damper system, and simultaneously regulating the vibration frequency of the damper by adjusting the elongation amount of the first and the second support rods. The boring rod structure has an important application value for promoting the flutter suppression during the boring process and ensuring the precision boring quality and has the characteristics of simple and compact structure, and easiness in control.
Description
Technical field
The utility model relates to a kind of boring bar, and particularly a kind of boring bar based on twin-stage tuned mass damper vibration damping belongs to the damper vibration damping technical field.
Background technology
Along with the high speed development of current society, every profession and trade proposes higher requirement to machining.One of most critical factor that influences the machining performance is exactly flutter; The inhibition technology of flutter is to guarantee the workpiece crudy, improves the prerequisite of machining efficient, and therefore seeming is even more important.Wherein, the process technology of deep hole is in the Aero-Space of modern industry, automobile industry, and fields such as military project manufacturing are used increasingly extensive, and crudy requires also more and more higher.Boring processing is in semi-closed state, and boring bar overhangs longer, and the back knife face of cutter and endoporus friction are bigger, system easily plays pendulum, flutter very easily takes place, because boring bar is the weakest link of rigidity in the whole system of processing in the boring process, process causes flutter extremely easily.Flutter by boring bar causes the finished surface chatter mark, the machining accuracy deficiency, and tool wear is serious, and the noise of generation also damages operator's physical and mental health.
For the control of flutter in the machining, domestic and international research personnel have carried out a large amount of research.Generally speaking, can be divided into two big classes: the control method of vibration control method and adjustment cutting parameter.In the vibration control method, the difference according to control actuating unit character is divided into the ACTIVE CONTROL method, passive control methods and half ACTIVE CONTROL method again.
Passive Control type method: but mainly be to reach the effect that vibration damping shakes by in system, adding the absorbing parts.Passive Passive Control does not need additional source of energy, and the principal oscillation system is depended in the work of shock absorber fully, its simple in structure, reliable operation.
The method of Passive Control is a lot, and tuned mass damper (TMD) just belongs to wherein a kind of; Tuned mass damper (TMD) mainly is made up of spring, damper and mass, and its operation principle is to utilize the inertia force of mass or the purpose that active controlling force reaches resonance energy-absorbing, minimizing structural response.The tuning quality bump leveller is a technology commonly used in the mechanical oscillation field.This notion is proposed first by Frahm.Ormondroyd and Hartog afterwards, Sims, people such as Lei Zuo have done big quantity research, and propose multiple tuned mass dampers on this basis (MTMD), i.e. a plurality of single tuning mass dampers independent of each other (STMD) in parallel on main structure.
Each above-mentioned device all has certain effect on Flutter Suppression, very responsive to controlled structural natural frequencies but the major defect of single tuning mass damper (STMD) is exactly it, optimizes and revises to be difficult to reach the optimum state of expection and to adjust efficient not high.The vibration control effect of multiple tuned mass dampers (MTMD) obviously is better than single tuning mass damper (STMD) under the constant condition of gross mass.The good more and amplitude taper that improves of the many more inhibition of vibration of damper number; But because practical problems such as bulk and parameter adjustings, the damper number limits to some extent.It is therefore above-mentioned that respectively to install inhibition of vibration undesirable.
The utility model content
The purpose of this utility model is to overcome above-mentioned cutting-vibration and suppresses system's deficiency, and a kind of boring bar based on twin-stage tuned mass damper vibration damping is provided.
The technical solution of the utility model is as follows:
A kind of boring bar based on twin-stage tuned mass damper vibration damping, comprise a boring bar, described boring bar front end has an endoporus, it is characterized in that: be provided with first support bar, second support bar, first damped oscillator, second damped oscillator, damper cover, hairclipper in the described endoporus; One of described first support bar stretches out boring bar end and cutter head matched in clearance, and mark closely fixing by screw, the first support bar other end is connected with the first damped oscillator threaded one end, the first damped oscillator other end has the indent cavity, indent cavity end and damper cover closely cooperate, and mark closely fixing by sunk screw; First damped oscillator is connected with second damped oscillator by second support bar, and second support bar is marked closely fixing by the sunk screw of first damped oscillator, one side; Described second damped oscillator places in the sealed cavity with damping oil of the first damped oscillator indent cavity and damper cover formation; First damped oscillator and boring bar endoporus matched in clearance, second damped oscillator cooperates with the first damped oscillator indent cavity clearance; The adjustment screw passes the boring bar hole wall and withstands hairclipper, is disposed with spring and spring shim between hairclipper and the damper cover, by spring action spring shim is contacted with damper cover.
Described damper cover is a sphere near the surface of spring shim one end.
Described first support bar, second support bar are the spring steel support bar.
Adjust screw by rotation and promote hairclipper, hairclipper promotes spring, thereby can reconcile the decrement of control spring, and then adjusts the contact force of spring shim and damper system, by adjusting the elongation of first support bar, second support bar, thus the vibration frequency of regulating damper.
The beneficial effect that the utlity model has is:
The utility model is by the adjustment screw of regulating action on hairclipper, change the dynamic characteristic of boring bar, change the frictional force size between frcition damper and the boring bar, first damped oscillator, second damped oscillator are by adjusting the elongation of first support bar, second support bar, the vibration frequency of regulating damper.Make boring bar be in optimum state in cutting state, when flutter took place, damper system took place thereby effectively suppress the flutter of boring process as the absorbing parts.
Description of drawings
Fig. 1 boring bar figure of the present utility model;
Fig. 2 boring bar scheme of installation;
Fig. 3 rotates and adjusts configuration state partial view behind the screw;
Fig. 4 cutting stability comparison diagram;
Among the figure: 1. boring bar; 2. hairclipper; 3. adjustment screw; 4. spring; 5. spring shim; 6. damper cover; 7. holding screw; 8. second damped oscillator; 9. second support bar; 10. sunk screw; 11. screw; 12. cutter head; 13.M3 countersunk head holding screw; 14. first support bar; 15. first damped oscillator; The platform 16. boring bar is installed; L. jib-length; D. diameter.
The specific embodiment
At first as Fig. 1, boring bar based on twin-stage tuned mass damper vibration damping of the present utility model, comprise a boring bar 1, boring bar 1 front end has an endoporus, is provided with first support bar 14, second support bar 9, first damped oscillator 15, second damped oscillator 8, damper cover 6, hairclipper 2 in the endoporus; 14 1 of first support bars stretch out boring bar 1 end and cutter head 12 matched in clearance, and mark closely fixing by screw 11, first support bar, 14 other ends are connected with first damped oscillator, 15 threaded one ends, first damped oscillator, 15 other ends have the indent cavity, indent cavity end and damper cover 6 closely cooperate, and are mutually 90 ° sunk screw by 4 and mark closely 7 fixing; First damped oscillator 15 is connected with second damped oscillator 8 by second support bar 9, and second support bar 9 is marked closely fixing by 2 M3 sunk screws 10 of first damped oscillator, 15 1 sides; Second damped oscillator 8 places in the sealed cavity with damping oil of first damped oscillator, 15 indent cavitys and damper cover 6 formation; First damped oscillator 15 and boring bar 1 endoporus matched in clearance, second damped oscillator 8 cooperates with first damped oscillator, 15 indent cavity clearance; Adjustment screw 3 passes boring bar 1 hole wall and withstands hairclipper 2, is disposed with spring 4 and spring shim 5 between hairclipper 2 and the damper cover 6, by spring action spring shim 5 is contacted with damper cover 6.Wherein, damper cover 6 is a sphere near the surface of spring shim 5 one ends, and first support bar 14, second support bar 9 are the spring steel support bar.
According to shown in Figure 2, according to conventional method boring bar is installed on the C6140 lathe, this moment, the boring bar L/D ratio example L/D that overhangs was about 10.
As shown in Figure 3, adjust screw 3 and withstand hairclipper 2, spring shim 5 is contacted with damper cover 6, and adjust the frictional force of contact.In actual applications, can adjust the elongation of first support bar 14, second support bar 9, regulate the vibration frequency of first damped oscillator 15, second damped oscillator 8.
With the similarity condition boring bar L/D ratio example L/D that overhangs is about 10, the frequency response function intrinsic frequency ω of system
1, rigidity k
Eqξ represents with damping ratio, is respectively 315Hz, 4.45N/ μ m and 0.02 and is example, obtains the boring stability diagram as shown in Figure 4.The following part of curve is the stability region in the boring process, the twin-stage damper is when flutter is about to take place, damper is enough to consume the energy that flutter produces as absorbing mechanism, and then greatly improves critical cutting depth, effectively avoids flutter and improves machine cut efficient.
More than be an embodiment of the present utility model, enforcement of the present utility model is not limited thereto.
Claims (3)
1. boring bar based on twin-stage tuned mass damper vibration damping, comprise a boring bar (1), described boring bar (1) front end has an endoporus, it is characterized in that: be provided with first support bar (14), second support bar (9), first damped oscillator (15), second damped oscillator (8), damper cover (6), hairclipper (2) in the described endoporus; (14) one of described first support bars stretch out boring bar (1) end and cutter head (12) matched in clearance, and mark closely fixing by screw (11), first support bar (14) other end is connected with first damped oscillator (15) threaded one end, first damped oscillator (15) other end has the indent cavity, indent cavity end and damper cover (6) closely cooperate, and it is fixing to mark closely (7) by sunk screw; First damped oscillator (15) is connected with second damped oscillator (8) by second support bar (9), and second support bar (9) is marked closely fixing by the sunk screw (10) of first damped oscillator (15) one sides; Described second damped oscillator (8) places in the sealed cavity with damping oil of first damped oscillator (15) indent cavity and damper cover (6) formation; First damped oscillator (15) and boring bar (1) endoporus matched in clearance, second damped oscillator (8) cooperates with first damped oscillator (15) indent cavity clearance; Adjustment screw (3) passes boring bar (1) hole wall and withstands hairclipper (2), is disposed with spring (4) and spring shim (5) between hairclipper (2) and the damper cover (6), by spring action spring shim (5) is contacted with damper cover (6).
2. the boring bar based on twin-stage tuned mass damper vibration damping according to claim 1 is characterized in that: damper cover (6) is a sphere near the surface of spring shim (5) one ends.
3. the boring bar based on twin-stage tuned mass damper vibration damping according to claim 1 is characterized in that: first support bar (14), second support bar (9) are the spring steel support bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206410825U CN201922058U (en) | 2010-11-26 | 2010-11-26 | Boring rod structure based on two-stage tuned mass damper for vibration damping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206410825U CN201922058U (en) | 2010-11-26 | 2010-11-26 | Boring rod structure based on two-stage tuned mass damper for vibration damping |
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| Publication Number | Publication Date |
|---|---|
| CN201922058U true CN201922058U (en) | 2011-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206410825U Expired - Lifetime CN201922058U (en) | 2010-11-26 | 2010-11-26 | Boring rod structure based on two-stage tuned mass damper for vibration damping |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101987366A (en) * | 2010-11-26 | 2011-03-23 | 北京工业大学 | Double-stage tuned mass damper vibration damping-based boring rod structure |
| CN106270591A (en) * | 2016-09-21 | 2017-01-04 | 哈尔滨理工大学 | A kind of passive type damping boring bar |
| CN106270590A (en) * | 2016-09-14 | 2017-01-04 | 哈尔滨理工大学 | A kind of passive type damping boring bar and best vibration damping property regulation method thereof |
| CN107378012A (en) * | 2017-07-25 | 2017-11-24 | 吉林工程技术师范学院 | A kind of machining tool |
-
2010
- 2010-11-26 CN CN2010206410825U patent/CN201922058U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101987366A (en) * | 2010-11-26 | 2011-03-23 | 北京工业大学 | Double-stage tuned mass damper vibration damping-based boring rod structure |
| CN106270590A (en) * | 2016-09-14 | 2017-01-04 | 哈尔滨理工大学 | A kind of passive type damping boring bar and best vibration damping property regulation method thereof |
| CN106270590B (en) * | 2016-09-14 | 2018-05-25 | 哈尔滨理工大学 | A kind of passive type damping boring bar and its best vibration damping property regulation method |
| CN106270591A (en) * | 2016-09-21 | 2017-01-04 | 哈尔滨理工大学 | A kind of passive type damping boring bar |
| CN106270591B (en) * | 2016-09-21 | 2018-05-25 | 哈尔滨理工大学 | A kind of passive type damping boring bar |
| CN107378012A (en) * | 2017-07-25 | 2017-11-24 | 吉林工程技术师范学院 | A kind of machining tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110810 Effective date of abandoning: 20120613 |