A kind of variable damping variation rigidity vibration suppression knife rest based on magnetorheological fluidTechnical field
The utility model relates to vibration suppression knife rest technical field more particularly to a kind of variable damping variation rigidities based on magnetorheological fluidVibration suppression knife rest.
Background technique
Currently, the control strategy to Metal Cutting Chatter mainly has two major classes: one kind is cutting parameter adjusting method, that is, is passed throughSelecting or adjust reasonable cutting parameter makes machine tool system be in stable region；Second class is vibration control method, that is, passes through vibrationControl methods avoid flutter come the performance for changing system and amendment boundary of stability.
Fierce self-excited vibration can usually occur in metal cutting process, between cutter and workpiece, i.e., it is so-calledFlutter, this will lead to the reduction of Precision Machining efficiency and machined surface quality decline or even defective work piece and cutter, after causing seriouslyFruit, therefore, it is necessary to quickly and effectively be inhibited to processing flutter, to improve tool surfaces processing quality, and current knifeIt is inconvenient when adjusting to have angle, is unsatisfactory for the use demand of personnel.
Summary of the invention
The purpose of this utility model is the presence of the above problem in view of the prior art, is proposed a kind of based on magnetorheological fluidVariable damping variation rigidity vibration suppression knife rest.
The purpose of this utility model can be realized by the following technical scheme:
A kind of variable damping variation rigidity vibration suppression knife rest based on magnetorheological fluid, including knife rest pass through spiral shell at the top of the knife restBolt is equipped with cylinder, and cylinder body has been screwed at the top of cylinder, and the outside of cylinder body is installed with coil, and cylinder body is internally embeddedThere is piston plate, throttle orifice is offered on piston plate, connecting rod has been bolted at the top of piston plate, the other end of connecting rod passes throughBolt is fixed with cutter, and one end hinge of cutter is connected with connecting rod, and the top of cutter is fixed with supporting block by screw, supportThe side of block is fixed with sliding rail by rivet, and sliding rail slidably connects slide bar, and the inside of slide bar is successively arranged adjusting from top to bottomBar and slide bar.
Preferably, the side of the knife rest is equipped with controller by screw, and controller is connect with coil electric, the gasCylinder and piston plate are electrically connected.
Preferably, the inside of the cylinder body is placed with magnetorheological fluid, and end cap, end cap have been screwed at the top of cylinder bodyOn offer aperture, the connecting rod passes through the inside of aperture.
Preferably, one end of the cutter is equipped with acceleration induction device by screw, and the side of the knife rest offersGroove, acceleration induction device are embedded in the inside of groove, and acceleration induction device and controller are electrically connected.
Preferably, it is welded with fixed link at the top of the cutter, threaded hole, the portion of the adjusting rod are offered in fixed linkDivide the inside for being threadedly secured in threaded hole.
Preferably, circular hole is offered on the slide bar, the inner wall of circular hole is installed with ball, and the part of the adjusting rod opens upThere is screw thread sliding slot, screw thread sliding slot is slidably connected with ball, and movable span is offered on slide bar, and the connecting rod is embedded in movable spanIt is internal.
The beneficial effects of the utility model are:
1, in the utility model by piston plate, controller, acceleration induction device, cylinder, connecting rod, cutter is isostructural setsIt sets, to magnet exciting coil input current, for magnetorheological fluid under the action of externally-applied magnetic field, as magnetic field strength applies, magnetorheological fluid canTo become solid-state by liquid within the time of Millisecond, piston panel vibration is hindered, removes magnetic field, magnetorheological fluid becomes again from solid-state againLiquid makes the vibration of cutter avoid avoiding resonance energy with the intrinsic frequency of cutting to change the intrinsic frequency of machiningThe accumulation of amount destroys the condition that flutter is formed, to achieve the purpose that cutting-vibration inhibits.
2, by slide bar, adjusting rod, screw thread sliding slot, the isostructural setting of connecting rod in the utility model, personnel can pass throughAdjusting rod adjusts the angle of cutter, and cutter can easily be adjusted when processing to workpiece, meet the use need of personnelIt asks.
Detailed description of the invention
Fig. 1 be the utility model proposes a kind of variable damping variation rigidity vibration suppression knife rest based on magnetorheological fluid Facad structureSchematic diagram；
Fig. 2 be the utility model proposes piston plate top view.
In figure: 1 knife rest, 2 coils, 3 piston plates, 4 slide bars, 5 connecting rods, 6 adjusting rods, 7 liquid storage cylinders, 8 connecting rods, 9 supporting blocks,10 cutters, 11 acceleration induction devices, 12 controllers, 13 end caps, 14 cylinders, 15 throttle orifices.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility modelClearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than wholeEmbodiment.
Referring to Fig.1-2, a kind of variable damping variation rigidity vibration suppression knife rest based on magnetorheological fluid, including knife rest 1, the knife rest 1Top cylinder 14 is equipped with by bolt, the side of knife rest 1 is equipped with controller 12, controller 12 and coil 2 by screwElectrical connection, cylinder 14 and piston plate 3 are electrically connected, and the top of cylinder 14 has been screwed cylinder body 7, the inside of cylinder body 7It is placed with magnetorheological fluid, the top of cylinder body 7 has been screwed end cap 13, and aperture is offered on end cap 13, and connecting rod 5 passes throughThe inside of aperture, the outside of cylinder body 7 are installed with coil 2, and cylinder body 7 has been internally embedded piston plate 3, has passed through piston plate 3, controller12, acceleration induction device 11, cylinder 14, connecting rod 8, the isostructural setting of cutter 10 input suitable electric current to magnet exciting coil, evenThe continuous rigidity and damping for changing magnetic rheological liquid damper also changes cutting and adds to change the rigidity and damping of cutting systemThe intrinsic frequency of work system makes the vibration of cutter 10 avoid the intrinsic frequency with cutting system, destroys the condition of flutter formation,To achieve the purpose that cutting-vibration inhibits, throttle orifice 15 is offered on piston plate 3, the top of piston plate 3 is boltedThere is connecting rod 8, the other end of connecting rod 8 has been bolted cutter 10, and the top of cutter 10 is welded with fixed link, opens in fixed linkEquipped with threaded hole, the partial threads of adjusting rod 6 are fixed on the inside of threaded hole, and one end of cutter 10 is equipped with acceleration by screwInductor 11 is spent, the side of knife rest 1 opens up fluted, and acceleration induction device 11 is embedded in the inside of groove, acceleration induction device11 are electrically connected with controller 12, and one end hinge of cutter 10 is connected with connecting rod 5, and the top of cutter 10 is fixed with by screwThe side of supporting block 9, supporting block 9 is fixed with sliding rail by rivet, and sliding rail slidably connects slide bar 4, offers circle on slide bar 4Hole, the inner wall of circular hole are installed with ball, and the part of adjusting rod 6 offers screw thread sliding slot, and screw thread sliding slot is slidably connected with ball, slidingMovable span is offered on bar 4, by slide bar 4, adjusting rod 6, screw thread sliding slot, the isostructural setting of connecting rod 5, personnel can pass through tunePole 6 adjusts the angle of cutter 10, and cutter 10 can easily be adjusted when processing to workpiece, meet the use of personnelDemand, connecting rod 5 are embedded in the inside of movable span, and the inside of slide bar 4 is successively arranged adjusting rod 6 and slide bar 4 from top to bottom.
Embodiment one connects working power, and controller 12 works, the model HY2N-32MR-10AD of controller 12, magneticUnder the action of externally-applied magnetic field, viscosity and rheological characteristic can change rheology liquid, its shear yield strength and magnetic field are strong at this timeDegree has stable corresponding relationship, can adjust the dynamic characteristic of vibration suppression cutter 10 rapidly by controlling magnetic field strength, be mounted onThe acceleration induction device 11 of cutter 10 can be used as the perceptron of system, the model DL24100 of acceleration induction device 11, can be withThe Vibration Condition of cutter 10 is acquired in real time, and vibration signal is transferred to the collection analysis module inside controller 12On, cutting state is fed back to controller 12 by calculating analysis, control signal is then exported to excitation electricity by controller 12 againStream is controlled, and to the electric current that magnet exciting coil 2 inputs, the rigidity of magnetorheological fluid is damped under the action of externally-applied magnetic field, is connectedContinue reversible variation, i.e., as magnetic field strength applies, magnetorheological fluid can become solid-state by liquid within the time of Millisecond, resistanceHinder piston plate 3 to vibrate, remove magnetic field, magnetorheological fluid becomes liquid again from solid-state again, to change the intrinsic frequency of machining, makesThe intrinsic frequency with cutting is avoided in the vibration of cutter 10, avoids the accumulation of resonance energy, destroys the condition that flutter is formed, thusAchieve the purpose that cutting-vibration inhibits.
Embodiment two, when adjusting the angle of cutter head, personnel can be rotated adjusting rod 6, rotate clockwise, and adjusting rod 6 is to the leftIt is mobile, partially goed deep into the inside of threaded hole by screw thread, partially in the internal slide of circular hole, meanwhile, when adjusting rod 6 is mobile, makeSlide bar 4 slides on adjusting rod 6, and one end of slide bar 4 is installed with steel ball, can slide on the slide rail, and sliding rail is skewed, slide bar 4When sliding to the left, height rises, and drives connecting rod 5 to be rotated up, to change the angle of cutter head, similarly, rotates counterclockwise tuneWhen pole 6, connecting rod 5 is pressed downward slide bar 4 by Slideslip to the right, and the both ends of sliding rail are equipped with limited block, it is ensured that slide bar 4 will not take offInside from sliding rail.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is notIt is confined to this, anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to thisNovel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility modelWithin enclosing.