CN201020635Y - Turning apparatus positive vibration damping device - Google Patents
Turning apparatus positive vibration damping device Download PDFInfo
- Publication number
- CN201020635Y CN201020635Y CNU2006201087747U CN200620108774U CN201020635Y CN 201020635 Y CN201020635 Y CN 201020635Y CN U2006201087747 U CNU2006201087747 U CN U2006201087747U CN 200620108774 U CN200620108774 U CN 200620108774U CN 201020635 Y CN201020635 Y CN 201020635Y
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- holder
- cutter holder
- actuator
- vibration damping
- lever
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Abstract
The utility model discloses a positive damping device used for machining tools, which comprises a cutter saddle, a tool holder for securing cutter, a vibration sensor, an actuator and a controller, wherein, a fixation seat of tool holder is arranged on head of the cutter saddle and the tool holder is fixed and positioned on the fixation seat of the tool holder. A cavity is arranged at the tail of the cutter saddle and the actuator is positioned inside the cavity. On the actuator, an output stem connecting with the tool holder is positioned. Moreover, the vibration sensor is arranged on the tool holder. The controller is electrically communicated with the vibration sensor and the actuator. The utility model is characterized in that the vibration sensor has high precision and the actuator is extensible due to super magnetism. A flexible hinge is arranged on the fixation seat of the tool holder, which reduces influences of vibration on turning and effectively promotes precision of cutting. Thereby, effective vibration reduction can be gained within rotation speed ranging from 5 to 300 r/min and response time for turning vibration can be controlled within 0.1 second, as well as vibrating amplitude of turning can be attenuated more than 10 dB.
Description
Technical field
The utility model relates to a kind of vibration absorber of turning equipment, especially relates to a kind of active damping device of turning equipment.
Background technology
In the lathe grinding process, mainly contain three class vibration sources and influence the machining accuracy of lathe, they be respectively extraneous random disturbances, workpiece to the active force of cutter module, the self-excitation of vibration absorber itself, the method main method of controlling cutting vibration at present comprises Passive Control method and ACTIVE CONTROL method.The Passive Control method is as traditional vibration control mode, mainly be by in system, adding the purpose that the absorbing parts reach the control cutting vibration, come of the vibration of separating vibration source as spring and the damping of fixing by operation parameter to the machinery processing apparatus generation, thus the influence that control or minimizing vibration bring; Simple in structure, the reliable operation of this method is widely used in the engineering, but shortcoming is a shock absorber after design processing, and various performance parameters is malleable not just, in the high frequency stage more satisfactory effect is arranged, but general in medium and low frequency stage vibration control effect; And the ACTIVE CONTROL rule is the principle according to FEEDBACK CONTROL, the change of a certain quantity of state by measuring system, then will with its variable quantity same frequency, with amplitude but anti-phase controlled quentity controlled variable be added on other quantity of state after being added to this quantity of state itself or doing corresponding change.
The mode that scholar both domestic and external in recent years begins to focus on employing active damping in the cutting vibration realizes vibration control, this method can directly apply the active force that can control to controll plant by actuator, thereby offset the vibratory response of the controll plant that causes by vibration source targetedly, reach the purpose that reduces the controll plant vibration amplitude.But present active damping device ubiquity the accurate inadequately problem of control accuracy, has also caused the precision of turning processing not ideal enough thus.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of active damping device that can improve the turning equipment of turning accuracy.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of active damping device of turning equipment, comprise knife rest, be fixed with the cutter holder of cutter, vibrating sensor, actuator and controller, the head of described knife rest is provided with the cutter holder holder, described cutter holder is fixedly installed on the described cutter holder holder, the afterbody of described knife rest is provided with cavity, described actuator is arranged in the described cavity, described actuator is provided with and the interconnective take-off lever of described cutter holder, described vibrating sensor is arranged on the described cutter holder, described controller is electrically connected with described vibrating sensor and described actuator, described vibrating sensor is the high accuracy vibrating sensor, described actuator is a giant magnetostrictive actuator, and described cutter holder holder is provided with the flexible hinge structure.
Described flexible hinge structure comprises vibration damping groove and the lightening hole that walks abreast and be provided with described vibration damping groove, be the bull nose that a radius is 18mm-22mm between the lower surface of the front end face of described cutter holder holder and described cutter holder holder, the bottom of described vibration damping groove is the half slot of radius 7mm-8mm, distance between the lower surface of the bottom of described vibration damping groove and described cutter holder holder is 18mm-22mm, the width of described lightening hole is 14mm-16mm, and the wall thickness between described lightening hole and the described vibration damping groove is 13mm-15mm.
In order to obtain desirable gyro rigidity value and minimum working stress, round radius between the lower surface of the front end face of described cutter holder holder and described cutter holder holder is preferably 20mm, the half slot radius of described vibration damping trench bottom is preferably 7.5mm, distance between the lower surface of the bottom of described vibration damping groove and described cutter holder holder is preferably 20mm, the width of described lightening hole is preferably 15mm, and the wall thickness between described lightening hole and the described vibration damping groove is preferably 14mm.
Described giant magnetostrictive actuator comprises overcoat, be provided with electromagnetic actuator device and the mechanical driving device of fixedlying connected in the described overcoat with described cutter holder, the two ends of described overcoat are respectively arranged with base and fastening nut, be provided with demarcation strip between described electromagnetic actuator device and the described mechanical driving device, described electromagnetic actuator device is arranged between described demarcation strip and the described base, described mechanical driving device is arranged between described fastening nut and the described demarcation strip, described demarcation strip is provided with connecting hole, and described electromagnetic actuator device and described mechanical driving device interconnect by described connecting hole.
Described electromagnetic actuator device comprises skeleton and coil, described skeleton is provided with axially extending bore, be provided with magnetostrictive rod in the described axially extending bore, described mechanical driving device comprises take-off lever, the afterbody of described take-off lever passes described connecting hole and described magnetostrictive rod apical grafting, the other end of described take-off lever passes described fastening nut fixedlys connected with described cutter holder, the coaxial pre-compressed spring that is arranged with on the described take-off lever, described take-off lever is provided with the spring-loaded dome, and described pre-compressed spring is arranged between described fastening nut and the described spring-loaded dome.
Described take-off lever front end is provided with and presses closer nut, and described take-off lever is fixedlyed connected with described cutter holder by the described nut that presses closer.
Compared with prior art, behind the cutter holder holder that advantage of the present utility model is to adopt high accuracy vibrating sensor, giant magnetostrictive actuator and be provided with the flexible hinge structure, can reduce the influence of cutting vibration, effectively improve the machining accuracy of cutting turning processing; The round radius that is provided with between the lower surface of the front end face of cutter holder holder and cutter holder holder is 20mm, the half slot radius of vibration damping trench bottom is 7.5mm, distance between the lower surface of the bottom of vibration damping groove and cutter holder holder is 20mm, the width of lightening hole is 15mm, wall thickness between lightening hole and the vibration damping groove is 14mm, can obtain gyro rigidity value and minimum working stress near ideal value; If adopt advanced immune control method, can in the range of speeds of 5～300r/min, play effective damping effect to turning vibration, to control response time of cutting vibration in 0.1s, can make the cutting vibration amplitude fading more than 10 decibels.
Description of drawings
Fig. 1 is the model schematic diagram of knife rest of the present utility model;
Fig. 2 is the model schematic diagram of integral body of the present utility model;
Fig. 3 is the cross-sectional view of knife rest of the present utility model;
Fig. 4 is the structural representation of giant magnetostrictive actuator of the present utility model;
Fig. 5 is a fundamental diagram of the present utility model.
The specific embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
Embodiment one: as shown in the figure, a kind of active damping device of turning equipment, comprise high accuracy vibrating sensor 1, controller 2, giant magnetostrictive actuator (GMA) 3 and knife rest 4, knife rest 4 heads are provided with cutter holder holder 5, cutter holder 8 is fixedly installed on the cutter holder holder 5, cutter 6 is fixing with cutter holder 8 usefulness nuts 7, the afterbody of knife rest 4 is provided with circular groove 9, giant magnetostrictive actuator 3 is arranged on by circular groove 9 and semi-cylindrical groove and covers in the 10 formed cavitys, cutter holder holder 5 be provided with vibration damping groove 52 and with the parallel lightening holes 51 of vibration damping groove 52, the bull nose that is a radius R1=20mm between the lower surface of the front end face of cutter holder holder 5 and cutter holder holder 5, the bottom of vibration damping groove 52 is the half slot of radius R 2=7.5mm, distance D=20mm between the lower surface of the bottom of vibration damping groove 52 and cutter holder holder 5, width B=the 15mm of lightening hole 51, the wall thickness H=14mm between lightening hole 51 and the vibration damping groove 52; Vibrating sensor 1 is arranged on the cutter holder 8, and controller 2 is electrically connected with vibrating sensor 1 and giant magnetostrictive actuator 3.
As shown in Figure 4, giant magnetostrictive actuator 3 comprises overcoat 17, the two ends of overcoat 17 are respectively arranged with base 14 and fastening nut 22, be provided with demarcation strip 24 in the inner chamber of overcoat 17, be provided with skeleton 16 between demarcation strip 24 and the base 14, skeleton 16 is around with coil 19, be provided with rubber ring 15 between skeleton 16 and the base 14, skeleton 16 is provided with axially extending bore, be provided with magnetostrictive rod 18 in the axially extending bore, be provided with take-off lever 20 between demarcation strip 24 and the fastening nut 22, be with pre-compressed spring 21 on the take-off lever 20, the afterbody of take-off lever 20 passes connecting hole and magnetostrictive rod 18 apical graftings on the demarcation strip 24, the other end of take-off lever 20 passes fastening nut 22, and the front end by being arranged on take-off lever 20 to press closer nut 23 cutter holders 8 fixedly connected, take-off lever 20 is provided with spring-loaded dome 25, pre-compressed spring 21 is arranged between fastening nut 22 and the spring-loaded dome 25.
As shown in Figure 5, the operation principle of active damping device is to add man-hour at workpiece 26, workpiece 26 comes in contact with cutter 6 and causes vibration, cause the displacement between workpiece 26 and the cutter 6 to change, be fixed on vibrating sensor 1 on the cutter holder 8 and can record the vibratory output of cutter 6, controller 2 is behind the vibration signal that receives vibrating sensor 1, the output control signal gives giant magnetostrictive actuator 3 with suitable driving voltage, make giant magnetostrictive actuator 3 give 6 one on cutter and direction of vibration opposite effect power by the take-off lever 20 that is fixed on the cutter holder 8, to suppress the Oscillation Amplitude of cutter 6, reach the purpose that the control cutting vibration improves machining accuracy.
Embodiment two: other is with embodiment one, difference is to be between the lower surface of the front end face of cutter holder holder 5 and cutter holder holder 5 bull nose of a radius R1=18mm, the bottom of vibration damping groove 52 is the half slot of radius R 2=7mm, distance D=18mm between the lower surface of the bottom of vibration damping groove 52 and cutter holder holder 5, width B=the 14mm of lightening hole 51, the wall thickness H=15mm between lightening hole 51 and the vibration damping groove 52.
Embodiment three: other is with embodiment one, difference is to be between the lower surface of the front end face of cutter holder holder 5 and cutter holder holder 5 bull nose of a radius R1=22mm, the bottom of vibration damping groove 52 is the half slot of radius R 2=8mm, distance D=22mm between the lower surface of the bottom of vibration damping groove 52 and cutter holder holder 5, width B=the 16mm of lightening hole 51, the wall thickness H=13mm between lightening hole 51 and the vibration damping groove 52.
Claims (6)
1. the active damping device of a turning equipment, comprise knife rest, be fixed with the cutter holder of cutter, vibrating sensor, actuator and controller, the head of described knife rest is provided with the cutter holder holder, described cutter holder is fixedly installed on the described cutter holder holder, the afterbody of described knife rest is provided with cavity, described actuator is arranged in the described cavity, described actuator is provided with and the interconnective take-off lever of described cutter holder, described vibrating sensor is arranged on the described cutter holder, described controller is electrically connected with described vibrating sensor and described actuator, it is characterized in that described vibrating sensor is the high accuracy vibrating sensor, described actuator is a giant magnetostrictive actuator, and described cutter holder holder is provided with the flexible hinge structure.
2. the active damping device of a kind of turning equipment as claimed in claim 1, it is characterized in that described flexible hinge structure comprises vibration damping groove and the lightening hole that walks abreast and be provided with described vibration damping groove, be the bull nose that a radius is 18mm-22mm between the lower surface of the front end face of described cutter holder holder and described cutter holder holder, the bottom of described vibration damping groove is the half slot of radius 7mm-8mm, distance between the lower surface of the bottom of described vibration damping groove and described cutter holder holder is 18mm-22mm, the width of described lightening hole is 14mm-16mm, and the wall thickness between described lightening hole and the described vibration damping groove is 13mm-15mm.
3. the active damping device of a kind of turning equipment as claimed in claim 2, it is characterized in that the round radius between the lower surface of the front end face of described cutter holder holder and described cutter holder holder is 20mm, the half slot radius of described vibration damping trench bottom is 7.5mm, distance between the lower surface of the bottom of described vibration damping groove and described cutter holder holder is 20mm, the width of described lightening hole is 15mm, and the wall thickness between described lightening hole and the described vibration damping groove is 14mm.
4. the active damping device of a kind of turning equipment as claimed in claim 1, it is characterized in that described giant magnetostrictive actuator comprises overcoat, be provided with electromagnetic actuator device and the mechanical driving device of fixedlying connected in the described overcoat with described cutter holder, the two ends of described overcoat are respectively arranged with base and fastening nut, be provided with demarcation strip between described electromagnetic actuator device and the described mechanical driving device, described electromagnetic actuator device is arranged between described demarcation strip and the described base, described mechanical driving device is arranged between described fastening nut and the described demarcation strip, described demarcation strip is provided with connecting hole, and described electromagnetic actuator device and described mechanical driving device interconnect by described connecting hole.
5. the active damping device of a kind of turning equipment as claimed in claim 4, it is characterized in that described electromagnetic actuator device comprises skeleton and coil, described skeleton is provided with axially extending bore, be provided with magnetostrictive rod in the described axially extending bore, described mechanical driving device comprises take-off lever, the afterbody of described take-off lever passes described connecting hole and described magnetostrictive rod apical grafting, the other end of described take-off lever passes described fastening nut fixedlys connected with described cutter holder, the coaxial pre-compressed spring that is arranged with on the described take-off lever, described take-off lever is provided with the spring-loaded dome, and described pre-compressed spring is arranged between described fastening nut and the described spring-loaded dome.
6. the active damping device of a kind of turning equipment as claimed in claim 5 is characterized in that described take-off lever front end is provided with to press closer nut that described take-off lever is fixedlyed connected with described cutter holder by the described nut that presses closer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201087747U CN201020635Y (en) | 2006-10-20 | 2006-10-20 | Turning apparatus positive vibration damping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201087747U CN201020635Y (en) | 2006-10-20 | 2006-10-20 | Turning apparatus positive vibration damping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201020635Y true CN201020635Y (en) | 2008-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006201087747U Expired - Lifetime CN201020635Y (en) | 2006-10-20 | 2006-10-20 | Turning apparatus positive vibration damping device |
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| CN (1) | CN201020635Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100443256C (en) * | 2006-10-20 | 2008-12-17 | 宁波大学 | Active vibration-damping device for cutting equipment, and control method thereof |
| CN103817561A (en) * | 2014-01-08 | 2014-05-28 | 宁波大学 | Precision noncircular surface turning two-dimensional control device and control method thereof |
| CN106891200A (en) * | 2015-09-16 | 2017-06-27 | 发那科株式会社 | Control device |
| CN107052895A (en) * | 2017-06-14 | 2017-08-18 | 哈尔滨理工大学 | A kind of machining Flutter Suppression device based on ultra-magnetic deformation actuator |
-
2006
- 2006-10-20 CN CNU2006201087747U patent/CN201020635Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100443256C (en) * | 2006-10-20 | 2008-12-17 | 宁波大学 | Active vibration-damping device for cutting equipment, and control method thereof |
| CN103817561A (en) * | 2014-01-08 | 2014-05-28 | 宁波大学 | Precision noncircular surface turning two-dimensional control device and control method thereof |
| CN103817561B (en) * | 2014-01-08 | 2016-05-04 | 宁波大学 | The two dimension controller of non-circular surfaces precision turning and control method |
| CN106891200A (en) * | 2015-09-16 | 2017-06-27 | 发那科株式会社 | Control device |
| CN106891200B (en) * | 2015-09-16 | 2019-06-25 | 发那科株式会社 | Control device |
| CN107052895A (en) * | 2017-06-14 | 2017-08-18 | 哈尔滨理工大学 | A kind of machining Flutter Suppression device based on ultra-magnetic deformation actuator |
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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 |
Effective date of abandoning: 20081217 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |