CN105921786A - Combined type intelligent vibration absorber for deep hole machining and automatic shifting control method for optimal auxiliary supporting positions - Google Patents
Combined type intelligent vibration absorber for deep hole machining and automatic shifting control method for optimal auxiliary supporting positions Download PDFInfo
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- CN105921786A CN105921786A CN201610398101.8A CN201610398101A CN105921786A CN 105921786 A CN105921786 A CN 105921786A CN 201610398101 A CN201610398101 A CN 201610398101A CN 105921786 A CN105921786 A CN 105921786A
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- insulating system
- vibration insulating
- vibration
- ball bearing
- support position
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
- B23B41/02—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor for boring deep holes; Trepanning, e.g. of gun or rifle barrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0032—Arrangements for preventing or isolating vibrations in parts of the machine
Abstract
The invention belongs to the technical field of mechanical design and manufacture, and aiming at solving the technical problems that in the present course of deep hole machining, an auxiliary supporting position is manually and blindly shifted by experience and the effect of vibration absorption is not ideal, the invention provides a combined type intelligent vibration absorber for deep hole machining and an automatic shifting control method for optimal auxiliary supporting positions. The combined type intelligent vibration absorber for deep hole machining comprises a magnetorheological fluid damper, a mechanical damping system and an automatic shift control system, wherein the magnetorheological fluid damper comprises a magnetorheological fluid cavity and a vibration absorption disk; the vibration absorption disk is installed in the magnetorheological fluid cavity; a supporting clapboard groove is arranged outside the magnetorheological fluid cavity; a hot-wire coil is wound around the supporting clapboard groove; and the magnetorheological fluid damper and mechanical damping system are installed on the automatic shift control system. The combined type intelligent vibration absorber has a unique structure and is of an important meaning for effectively inhibiting vibration of a deep hole drill rod, improving the deep hole machining accuracy and realizing intelligent digital control of a high-grade deep hole machining tool.
Description
Technical field
The invention belongs to machine design and manufacture technical field, be specifically related to a kind of combined type Intelligent deep hole processing shock absorber
And preferably auxiliary Support Position is from control method for movement.
Background technology
Deep hole machining is an important branch of equipment manufacture, and it is widely used in military project, Aeronautics and Astronautics, high ferro, machine
The fields such as bed, engine, automobile, energy resources exploitation.Due to the specific function of deep-hole parts, deep-hole parts usually becomes decision product
The key component of quality and benefits.Particularly modern mechanical product is more and more higher to the requirement of function, configuration aspects, and deep hole machining is not
Breaking and develop towards high accuracy, high efficiency, intelligentized direction, and deep hole machining is because of its big L/D ratio, it is only that many interference retrain
Characteristic, creates that its stiffness system is poor, cooling is difficult, vibrate obvious intrinsic inferior position, in addition in deep hole machining cutter rotation and
Feeding, the dynamic loading coupling of simultaneous high-pressure cutting fluid, it is frequent that this causes the flexion torsion in deep hole machining to vibrate,
And exacerbate the abrasion of deep hole processing cutter.And at present during deep hole machining, it is typically all by experience manually the most mobile
Auxiliary Support Position, lack of wisdom actively presses down vibration means, causes effectiveness in vibration suppression undesirable.
For the dynamic whirling motion in deep hole processing system, nonlinear Problem of Vibration, this is carried out by domestic and international researcher
Substantial amounts of practice and theoretical research, by optimizing drilling parameter, cutter parameters, increase the measures such as auxiliary support apparatus and suppress to shake
Dynamic, also there is researcher to establish deep hole processing system model, research center supports, assists Support Position, quantity etc. to vibration
Impact, but it is also little to be applied particularly to the research of practice, take into account simultaneously auxiliary Support Position and the drilling degree of depth be mutually matched and
The deep hole machining auxiliary support apparatus of the controlled vibration-damping function of intelligence, did not the most occur.
Therefore, develop high-grade numerical control deep-hole machining tool, solve deep hole machining weak separation system problem, thus effectively control
A dynamic vibration difficult problem, the target finally realizing machining accuracy deep hole is the most very urgent.
Summary of the invention
During the present invention solves current deep hole machining, by experience manually the most mobile auxiliary Support Position, and vibration damping
The technical problem that effect is undesirable, it is provided that a kind of combined type Intelligent deep hole processing shock absorber and preferably auxiliary Support Position are from moving
Flowing control method.
The technical solution used in the present invention is as follows:
A kind of combined type Intelligent deep hole processing shock absorber, including vibration insulating system with from mobile adjustment system, described vibration insulating system bag
Include magnetic rheological liquid damper and mechanical damping system；
Described magnetic rheological liquid damper includes hot-wire coil, supporting clapboard groove, vibration damping disc, magnetic flow liquid and vibration insulating system
Drive end bearing bracket and the magnetic flow liquid fluid cavity of vibration insulating system rear end cap composition, be full of magnetic flow liquid in described magnetic flow liquid fluid cavity,
Described vibration damping disc runs through and is installed in magnetic flow liquid fluid cavity, and the outside of magnetic flow liquid fluid cavity is provided with supporting clapboard groove,
Described hot-wire coil is wound on supporting clapboard groove；
Described mechanical damping system includes being set in the knife bar support set of drilling-rod external wall, taper damping sleeve, tapered sleeve seat, deep-groove ball axle
Hold, deep groove ball bearing seat, end ring, trim ring, thrust ball bearing, gland, thrust bearing locating shaft, drive seat and linear drives
Device, described taper damping sleeve is set in knife bar support set outer wall, and taper damping sleeve is externally provided with tapered sleeve seat, and the front end of tapered sleeve seat is fixed
Being provided with trim ring, closely cooperate between trim ring and vibration insulating system drive end bearing bracket, the inner side of magnetic flow liquid fluid cavity is provided with deep-groove ball
Bearing block, closely cooperates between described deep groove ball bearing seat both sides and vibration insulating system drive end bearing bracket and vibration insulating system rear end cap, zanjon
Ball bearing housing both sides shoulder hole is respectively mounted the first deep groove ball bearing and the second deep groove ball bearing, the first deep groove ball bearing and second
Being provided with end ring between the inner ring of deep groove ball bearing, described end ring is installed on tapered sleeve seat, the rear end of described tapered sleeve seat
Being provided with evagination chuck, evagination chuck acts on outside the inner ring of the second deep groove ball bearing, and the rear end connection of taper damping sleeve pushes away
Power bearing locating shaft, thrust bearing locating shaft is arranged with thrust ball bearing, and thrust bearing locating shaft is threadeded with driving seat,
Being provided with gland between inner chamber and the driving seat of vibration insulating system rear end cap, gland is provided with three grades of axis holes, and first order axis hole acts on
The outer ring of thrust ball bearing, third level axis hole acts on thrust bearing location hollow shaft, passes through screw between gland and driving seat
Connecting, on the flange of driving seat, the both sides with drill rod axis horizontal parallel are connected to a linear actuator；
The most mobile described adjustment system includes bearing, servomotor, motor cabinet, shaft coupling, bevel gear reducer, slide block, straight line
Guide rail, feeding main shaft, helical gear and vibration insulating system base, described bearing is made up of the gripper shoe of horizontal stand and both sides, described
The side welding motor cabinet of fagging, the side installation servomotor of motor cabinet, opposite side installation shaft coupling and bevel gear reducer,
Servomotor, shaft coupling are connected with each other with bevel gear reducer, and under vibration insulating system base, the left and right sides sets along drilling rod axial direction
Having slide block and the line slideway matched with slide block, bevel gear reducer is installed on vibration insulating system base across two line slideways
Center, bevel gear reducer connects feeding main shaft, feeding main shaft is provided with helical gear；
Described vibration insulating system drive end bearing bracket or vibration insulating system rear end cap are provided with the power line interface channel being connected with hot-wire coil,
Vibration insulating system drive end bearing bracket is fixed by screw with vibration insulating system rear end cap, and described vibration damping disc is installed on deep groove ball bearing seat,
Described linear actuator is horizontally installed on bearing, and described bearing and vibration insulating system drive end bearing bracket are fixedly installed in vibration insulating system base
On.
Described vibration damping disc longitudinal cross-section is half side in fan shape, and axial both sides offer the boss of ring network trellis and recessed
Groove, vibration damping disc relies on the location shaft shoulder on key, holding screw and deep groove ball bearing seat to be fixed on deep groove ball bearing seat.
The front-end and back-end of described taper damping sleeve interlock respectively and alternate uniform offer the wedging method not run through.
It is respectively equipped with sealing between described deep groove ball bearing seat both sides and vibration insulating system drive end bearing bracket and vibration insulating system rear end cap
Packing ring.
It is provided with felt seal ring between the inner chamber of described gland and vibration insulating system rear end cap.
A kind of combined type Intelligent deep hole processing shock absorber preferably assists Support Position from control method for movement, is embodied as step
Suddenly it is:
By a length ofDrilling rod discrete for N number of node, and by the drilling degree of depthDiscrete for N number of node, according to the processing hole determined
Footpath, inner and outer diameter and material properties, by formula:
Obtain the relation between auxiliary Support Position, the drilling degree of depth and drilling rod vibration, thus try to achieve optimum auxiliary Support Position and solve；
(1). determine that first node assists Support Position: when the drilling degree of depth, and take respectively, wherein,Thus numerical value solves and the drilling degree of depthThe optimum matchedSolve；
(2). determine and initially assist Support Position: according to the first auxiliary Support Position determined, because of preboring bullport
Exist, will initially assist Support Position to move the most afterwards?；
(3). determine that Section Point assists Support Position: when the drilling degree of depth, and take respectively, its
In,Thus numerical value solves and the drilling degree of depthThe optimum matchedSolve；
(4). determine that each node assists Support Position: use said method,, obtain successively
Optimum auxiliary Support Position corresponding at each drilling degree of depth node solves；
(5). according to the preferably auxiliary Support Position determined, determine the displacement difference between each two adjacent supports position, thus, determine the translational speed between every adjacent supports position, and deep hole adds
Work tool feeding speedFor steady state value, foundation tool feeding speed, monitor the deep hole machining degree of depth, thus, build
Vertical from translational speedAnd tool feeding speedBetween relation；Become by default auxiliary support damping device
SpeedAdjustment programme, it is achieved auxiliary Support Position is mutually matched automatically with the drilling degree of depth, reaches the excellent of optimal damping property
Support Position is selected to catch.
Beneficial effects of the present invention:
1, machinery vibration damping is complex as a whole by the present invention with magnetic rheological liquid damper, and the two complements each other, compact conformation, by cone
Shape damping sleeve is held tightly completely with drilling rod, increases damping, i.e. produces damping effect, the most more can relevantly map brill vibration of bar shape
Condition, and vibration state is delivered to vibration damping disc, and then magnetic rheological liquid damper is quickly produced actively press down use of bestirring oneself, pass through
Mechanical damping and the coupling of magnetic flow liquid inverting mechanism, significantly enhance inhibition of vibration, though magnetic rheological liquid damper
Occurring abnormal, mechanical damping system can also play and preferably press down use of bestirring oneself, and meanwhile, magnetic rheological liquid damper compensate for machinery resistance
Damping system can not the shortcoming of active control.
2, the taper damping sleeve front and back ends in the present invention interlocks respectively and alternate uniform offers the wedging method not run through, by directly
The push-and-pull action of dimension driver realizes holding tightly or unclamping, thus increases or reduce damping.
3, the vibration damping disc longitudinal cross-section in the present invention is half side in fan shape, axial both sides are uniform offer cancellated recessed
Groove and boss, increase the contact area of vibration damping disc and magnetic flow liquid, is more conducive to the shearing to magnetic flow liquid or movement, thus
Excitation magnetic flow liquid is had an effect.
4, the present invention uses MR damper response rapidly, continuously and the superior function of reversible transition, different excellent
In the range of selecting Support Position, by applying the effect of different impressed current, completing the optimum active control of damping property, it is suitableeer
Effective control for large span solid boring bar system vibration.
5, the present invention utilizes linear actuator to realize holding tightly and unclamping, simple in construction of taper damping sleeve, and response is rapid, easily
In realizing control.
6, the present invention is controlled the translational speed of shock absorber by servomotor, according to deep hole processing cutter-drilling rod feeding speed
Degree, can monitor the deep hole machining degree of depth in real time, and according to processing request, determines initial support-position (i.e. initial tool distance auxiliary
The position supported), the Mathematical Modeling comprising run of steel, feed speed, auxiliary Support Position etc. set up by theoretical research,
Set up the path optimizing of auxiliary Support Position and the drilling degree of depth, thus set auxiliary support damping device speed change degree adjustment programme,
Thus with the Matching and modification of cutter-between drilling rod feed speed and auxiliary support apparatus translational speed, it is achieved auxiliary Support Position
With being automatically mutually matched of the drilling degree of depth, the preferred Support Position reaching optimal damping property catches.
7, in the present invention from mobile adjustment system, utilize axis system to drive the fixing of helical gear and Machine Tool Feeding System
Tooth bar engages each other, and is installed on two rail plate centre positions, uniform force, operates steadily.Reduce from mobile adjustment system
The quantity that auxiliary supports, also relatively reduces the length of drilling rod under identical working depth simultaneously.
8, the present invention utilizes from the mobile relative speed difference with tool feeding speed of regulating the speed simultaneously, beneficially taper damping
Holding tightly of set.
9, use the present invention to different processing dimension requirements, only need to change drilling rod, knife bar support set accordingly and drive seat, i.e.
Can facilitate, the simple and direct uniformity ensureing auxiliary support function.
10, the present invention from machinery vibration insulating system, magnetic rheological liquid damper, preferably assist Support Position, Based Intelligent Control etc. many
Orientation angles, is effectively improved the auxiliary to solid boring bar system and supports vibration damping efficiency.Machinery vibration insulating system is hindered with magnetic flow liquid
Buddhist nun's device is integrated in one, and utilizes buckle to be fixed on base, simple in construction, and integral demounting is convenient.
Accompanying drawing explanation
Fig. 1 is the front view of the present invention；
Fig. 2 is the side view of the present invention；
Fig. 3 is the structural representation of vibration damping disc；
Fig. 4 is the front view of taper damping sleeve；
Fig. 5 is the side view of taper damping sleeve；
Fig. 6 is to become strategy of speed control schematic diagram from mobile；
In figure: 1-hot-wire coil；2-supporting clapboard groove；3-magnetic flow liquid fluid cavity；4-vibration damping disc；5-seal washer；6-
One deep groove ball bearing；7-the second deep groove ball bearing；8-trim ring；9-tapered sleeve seat；10-drilling rod；11-knife bar support set；12-taper hinders
Buddhist nun overlaps；13-end ring；14-deep groove ball bearing seat；15-key；16-vibration insulating system drive end bearing bracket；17-power line interface channel；
18-lifting bolt；19-magnetic flow liquid；20-sealing ring；21-vibration insulating system rear end cap；22-holding screw；23-felt seal
Circle；24-thrust ball bearing；25-gland；26-thrust bearing locating shaft；27-hexagon socket cap head screw；28-drives seat；
29-linear actuator front connector 30-flange；31-linear actuator；32-bearing；33-bevel gear reducer；34-feeding master
Axle；35-helical gear；36-clamping screw；37-studs；38-snap close；39-vibration insulating system base；40-motor cabinet；41-joins
Axial organ；42-servomotor；43-slide block；44-line slideway；45-workpiece；46-shock absorber auxiliary supports.
Detailed description of the invention
A kind of combined type Intelligent deep hole processing shock absorber, including vibration insulating system with from mobile adjustment system, described vibration damping system
System includes magnetic rheological liquid damper and mechanical damping system；
As shown in Figure 1, 2, described magnetic rheological liquid damper includes hot-wire coil 1, supporting clapboard groove 2, vibration damping disc 4, magnetorheological
The magnetic flow liquid fluid cavity 3 that liquid 19 and vibration insulating system drive end bearing bracket 16 and vibration insulating system rear end cap 21 form, described magnetic flow liquid
Being full of magnetic flow liquid 19 in fluid cavity 3, described vibration damping disc 4 runs through and is installed in magnetic flow liquid fluid cavity 3, magnetic flow liquid fluid
The outside in chamber 3 is provided with supporting clapboard groove 2, and described hot-wire coil 1 is wound on supporting clapboard groove 2, as it is shown on figure 3, in order to increase
Big vibration damping disc 4 and the contact area of magnetic flow liquid 19, described vibration damping disc 4 both sides offer the boss of ring network trellis, institute
State vibration insulating system drive end bearing bracket 16 or vibration insulating system rear end cap 21 is provided with the power line interface channel being connected with hot-wire coil 1
17, vibration insulating system drive end bearing bracket 16 is fixed by hexagon socket cap head screw with vibration insulating system rear end cap 21, for preventing magnetic flow liquid
19 reveal, and vibration insulating system drive end bearing bracket 16 and vibration insulating system rear end cap 21 junction are provided with sealing ring 20.
As shown in Figure 1, 2, described mechanical damping system includes being set in the knife bar support set 11 of drilling rod 10 outer wall, taper resistance
Buddhist nun overlaps 12, tapered sleeve seat 9, deep groove ball bearing, deep groove ball bearing seat 14, end ring 13, trim ring 8, thrust ball bearing 24, gland
25, thrust bearing locating shaft 26, driving seat 28 and linear actuator 31, described taper damping sleeve 12 is set in knife bar support set 11
Outer wall, taper damping sleeve 12 is externally provided with tapered sleeve seat 9, and the front end of tapered sleeve seat 9 is fixedly installed trim ring 8, before trim ring 8 and vibration insulating system
Closely cooperating between end cap 16, the inner side of magnetic flow liquid fluid cavity 3 is provided with deep groove ball bearing seat 14, described deep groove ball bearing seat
Closely cooperate between 14 both sides and vibration insulating system drive end bearing bracket 16 and vibration insulating system rear end cap 21, and be respectively equipped with seal washer 5, anti-
The only leakage of magnetic flow liquid, deep groove ball bearing seat 14 both sides shoulder hole is respectively mounted the first deep groove ball bearing 6 and the second deep-groove ball
Bearing 7, and ensure interference fits between two deep groove ball bearings and deep groove ball bearing seat 14, the first deep groove ball bearing 6 and second is deep
Being provided with end ring 13 between the inner ring of ditch ball bearing 7, described end ring 13 is installed on tapered sleeve seat 9, described tapered sleeve seat 9
Rear end is provided with evagination chuck, and the Under Asymmetrical side stage rank of evagination chuck and vibration insulating system rear end cap 21 act on the second deep groove ball bearing
Outside the inside and outside circle of 7, it is achieved the location of deep groove ball bearing, outside 8-trim ring and the Under Asymmetrical side stage of vibration insulating system drive end bearing bracket 16
Rank are respectively acting on the inside and outside circle of the first deep groove ball bearing 6；Vibration damping disc 4 is by key 15, holding screw 22 and deep groove ball bearing
Positioning retainer ring on seat (is i.e. positioned) on deep groove ball bearing seat by axial grip, and realizes power transmission, along with rotary drilling
Bar 10 dynamic vibration, vibration damping disc 4 maps its state, rotation slightly or transverse shifting accordingly, and vibration damping disc 4 all will be caused to cut
Cut magnetic flow liquid；The rear end of taper damping sleeve 12 connects thrust bearing locating shaft 26, and thrust bearing locating shaft 26 is arranged with
Thrust ball bearing 24, the endoporus of thrust bearing locating shaft 26 is threaded, and threadeds with between the first order axis hole driving seat 28,
It is provided with gland 25, gland 25 and the inner chamber of vibration insulating system rear end cap 21 between inner chamber and the driving seat 28 of vibration insulating system rear end cap 21
Between use felt seal ring 23 seal, gland 25 is provided with three grades of axis holes, and first order axis hole acts on thrust ball bearing 24
Outer ring, third level axis hole acts on thrust bearing location hollow shaft 26, by interior hexagonal cylindrical between gland 25 and driving seat 28
Head screw 27 connects, and drives the both sides parallel with drilling rod 10 axis horizontal on the flange of seat 28 to be connected to a linear drives
Device 31, the push-and-pull campaign of linear actuator 31 drives taper damping sleeve 12 tighten up and unclamp, as shown in Figure 4,5, taper damping sleeve
12 front and back ends are the most uniform offers the wedging method not run through, and clamps because of wedging method, and then makes to prop up with the knife bar of drilling rod 10 interference fit
Support set 11 holds drilling rod 10 tightly, and the installation of taper damping sleeve 12 to should be smaller diameter end i.e. front end consistent with direction of feed, straight line
Driver 31 is horizontally installed on bearing 32 by the two of chassis flanges, and bearing 32 is relatively independent with shock absorber.
As shown in Figure 1, 2, the most mobile described adjustment system includes bearing 32, servomotor 42, motor cabinet 40, shaft coupling
41, bevel gear reducer 33, slide block 43, line slideway 44, feeding main shaft 34, helical gear 35 and vibration insulating system base 39, described
Bearing 32 is made up of the gripper shoe of horizontal stand and both sides, the side welding motor cabinet 40 of described gripper shoe, the side of motor cabinet 40
Installing servomotor 42, opposite side installs shaft coupling 41 and bevel gear reducer 33, by the location of motor cabinet 40 by servo electricity
Machine 42, shaft coupling 41 are connected with each other with bevel gear reducer 33, and 39 times left and right sides of vibration insulating system base are along drilling rod 10 axially side
To being provided with slide block 43 and the line slideway 44 matched with slide block 43, it is horizontal that bevel gear reducer 33 is installed on vibration insulating system base 39
Across the center of two line slideways 44, bevel gear reducer 33 connects feeding main shaft 34, by clamping screw by helical gear 35
It is installed on feeding main shaft 34；Vibration insulating system, bearing 32 integral installation on vibration insulating system base 39, vibration insulating system drive end bearing bracket 16
Offer horizontal stand with the outside of drilling rod 10 horizontal parallel, be fixed on vibration insulating system base 39 by snap close 38 and studs 37
On, vibration insulating system base 39 is matched with line slideway 44 by slide block 43, it is achieved axial feed and release.By preprogrammed control
Processing procedure sequence controls servomotor 42, is automatically adjusted from translational speed and then adjusts Support Position, it is achieved mating with the drilling degree of depth
Preferably auxiliary Support Position.
The speed change degree that the most mobile adjustment of described combined type Intelligent deep hole processing shock absorber is based on shock absorber moves and cutter
The real-time matching of tool-drilling rod feed speed, realizes the working depth mutual Optimum Matching with shock absorber auxiliary Support Position
Active control strategy.
As shown in Figure 6, the combined type Intelligent deep hole processing shock absorber of the present invention preferably assists Support Position to control from mobile
The step that is embodied as of method is:
By a length ofDrilling rod discrete for N number of node (it is 32 that ordinary circumstance takes N), and by the drilling degree of depthDiscrete for N
Individual node, according to the processing aperture determined, inner and outer diameter and material properties, by formula:
Obtain the relation between auxiliary Support Position, the drilling degree of depth and drilling rod vibration, thus optimum auxiliary Support Position can be tried to achieve
Solve；
(1). determine that first node assists Support Position: when the drilling degree of depth, and take respectively,
Wherein,Thus numerical value solves and the drilling degree of depthThe optimum matchedSolve.
(2). determine and initially assist Support Position: according to the first auxiliary Support Position determined, because preboring guides
The existence in hole, will initially assist Support Position to move the most afterwards?.
(3). determine that Section Point assists Support Position: when the drilling degree of depth, and take respectively, wherein,Thus numerical value solves and the drilling degree of depthThe optimum matched
Solve.
(4). determine that each node assists Support Position: use said method,, according to this
Obtain optimum auxiliary Support Position corresponding at each drilling degree of depth node to solve.
(5). according to the preferably auxiliary Support Position determined, it may be determined that the displacement difference between each two adjacent supports position, thus, determine the translational speed between every adjacent supports position, and deep hole machining cutter
Tool feed speedFor steady state value, foundation tool feeding speed, just can monitor the deep hole machining degree of depth, thus,
Set up from translational speedAnd tool feeding speedBetween relation;By default auxiliary support damping device
Speed change degreeAdjustment programme, can realize assisting automatically being mutually matched of Support Position and the drilling degree of depth, reach the most damping
The preferred Support Position of energy catches.
Embodiment
Experiment parameter: tool diameter is 18.91, run of steel is 1800, and internal diameter is 11.5 and external diameter is 17, Young's modulus
E is 2.06*1011Pa, processes alloy steel material, and its density is 7.87*103, working depth 200, cutting fluid density 866kg/m3。
Solved by above-mentioned equation, determine the first auxiliary Support Position, when the drilling degree of depth；Take, try to achieve first five rank intrinsic frequency of drilling rod, respectively 39.538,103.718,200.477,329.390,
490.571；Take, try to achieve first five rank intrinsic frequency of drilling rod, respectively 39.261,103.362,200.016,
328.823,482.325；Try to achieve successivelyEach value unitThe intrinsic frequency of place's drilling rod, and in process, drilling rod
The cutting parameter such as length, rotating speed is constant, compares intrinsic frequency at more each node, preferably whenTime, its intrinsic frequency
Rate is 35.318,98.630,189.329,318.469,483.076, and first natural frequency is relatively low, and inhibition of vibration is preferable.From
And determine initial auxiliary Support Position point, the translational speed of shock absorberWith tool feeding speedUnanimously,
In experiment, tool feeding speed is 10mm/min.
Determine the second auxiliary Support Position successively?Place's inhibition of vibration is good, so that it is determined that
Assist at support to second at the first auxiliary support, the translational speed of shock absorber,, the most really
Determine the translational speed of shock absorber, then determine the translational speed between every adjacent supports position successively, afterwards according to tool feeding speed, just can monitor the deep hole machining degree of depth, thus, set up from moving
Dynamic speedAnd tool feeding speedBetween relation；Data those skilled in the art of all calculating
Easily draw according to common knowledge.
The concrete of combined type Intelligent deep hole of the present invention processing shock absorber assembles and uses:
Utilize hexagon socket cap head screw that tapered sleeve seat 9 is fixed on the inner side of trim ring 8, deep groove ball bearing, bearing gear are installed successively
Circle 13, deep groove ball bearing seat 14 and vibration insulating system drive end bearing bracket 16；Felt seal is utilized between trim ring 8 and vibration insulating system drive end bearing bracket 16
Circle seals, and the outside of deep groove ball bearing seat 14 adds sealing filler ring 5 respectively, thus with vibration insulating system drive end bearing bracket 16, vibration damping
System Back-end lid 21 formed seal and axial grip, rely on the bearing positioning table of vibration insulating system drive end bearing bracket 16, end ring 13 and
The ladder boss of deep groove ball bearing seat 14 carries out the axial restraint of Internal and external cycle to deep groove ball bearing；By key 15, holding screw 22
Vibration damping disc 4 is fixed in deep groove ball bearing seat 14 chuck, forms entirety；And successively by hot-wire coil 1, supporting clapboard groove 2
It is installed on the outside bottom outlet of vibration insulating system drive end bearing bracket 16；By hexagon socket cap head screw by vibration insulating system drive end bearing bracket 16 and vibration damping system
System rear end cap 21 is fixed；Whole magnetic flow liquid fluid cavity 3 is full of magnetic flow liquid 19.
Thrust bearing locating shaft 26 is connected to the rear end of taper damping sleeve 12 by pin, and thrust ball bearing 24 is set in and pushes away
On power bearing locating shaft 26, felt seal ring 23 between gland 25 and vibration insulating system rear end cap 21, is utilized to seal, and will pressure
Overlap 25 first order axis holes and act on the outer ring of thrust ball bearing 24；Hexagon socket cap head screw is used between gland 25 and driving seat 28
27 connect, and drive and threaded constituent components between seat 28 and thrust bearing locating shaft 26.Knife bar support set 11, taper damping sleeve
12, vibration insulating system drive end bearing bracket 16, vibration insulating system rear end cap 21, driving seat 28 and drilling rod 10 are all strictly coaxial.
Linear actuator front connector 29 on two linear actuators 31 utilizes screw thread and pin to be connected to and drilling rod 10 axle
Both sides on the flange driving seat 28 of line horizontal parallel, the push-and-pull campaign of linear actuator 31 drive taper damping sleeve 12 tighten up with
Unclamp, thus increase or reduce the damping to drilling rod 10；Linear actuator 31 is horizontally installed to prop up by the two of chassis flanges
On seat 32, bearing 32 is relatively independent with vibration insulating system.Bearing 32 is made up of horizontal stand and supported on both sides plate, the one of supported on both sides plate
Side welding motor cabinet 40, is interconnected servomotor 42, shaft coupling 41 with bevel gear reducer 33 phase by the location of motor cabinet 40
Connect, and bevel gear reducer 33 is installed on the vibration insulating system base 39 center across two line slideways 44, be beneficial to ensure fortune
Row steadily, bevel gear reducer 33 connects feeding main shaft 34, by clamping screw 36, helical gear 35 is installed on feeding main shaft
On 34.Vibration insulating system, bearing 32 integral installation are on vibration insulating system base 39, and vibration insulating system drive end bearing bracket 16 is put down with drilling rod 10 level
The outside of row offers horizontal stand, is fixed on vibration insulating system base 39 by snap close 38 and studs 37, during dismounting, only needs
Extract drilling rod 10 out, unclamp two side locks 38, can be by lifting bolt 18, by overall to magnetic rheological liquid damper and mechanical damping system
Separate；Vibration insulating system base 39 is matched with line slideway 44 by slide block 43, it is achieved axial feed and release.Pass through preprogrammed
Control program controls servomotor 42, is automatically adjusted translational speed and then adjusts Support Position, it is achieved mating with the drilling degree of depth
Preferably auxiliary Support Position.Drilling rod 10 passes from vibration insulating system rear end cap 21 center, the general mobile speed supporting vibration insulating system
Degree is less than tool feeding speed, and taper damping sleeve 12 holds drilling rod 10 tightly, utilizes relative speed difference and taper damping sleeve 12 and bores
Mutual frictional force between bar 10 more conducively taper damping sleeve 12 holds drilling rod 10 tightly；Different processing dimension requirements, only need the most more
Change drilling rod 10, knife bar support set 11 and drive seat 28, can facilitate, the uniformity of simple and direct guarantee auxiliary support function.
In drilling process, first by linear actuator 31, to tool feeding direction, pushing drives seat 28 so that gland 25 squeezes
Pressure thrust ball bearing 24, and then tightens up taper damping sleeve 12, and drives knife bar support set 11 to hold drilling rod 10 tightly, meanwhile, according to
Preferably assist Support Position from moving to difference, also can adjust hot-wire coil 1 according to actual deep hole machining vibrational state in good time
Electric current, thus change magnetorheological damping effect and control to reach the active to drill pipe system.Final realize from machinery vibration insulating system,
Magnetic rheological liquid damper, preferably assist the multi-faceted angle such as Support Position, Based Intelligent Control, be effectively improved solid boring bar system
Auxiliary supports vibration damping efficiency, and deep hole machining precision is greatly improved, and promotes deep hole machining equipment class and intelligent level.
It is an object of the invention to develop one based on magnetic flow liquid and mechanical damping combined type intelligent vibration damper, this combined type
Intelligent vibration damper is possible not only to provide quick, controlled vibration-damping function, and can being continually changing along with working depth, automatically
Mate its Support Position, rely on machinery vibration insulating system, magnetic rheological liquid damper, preferably assist Support Position, Based Intelligent Control etc. many
Orientation vibration reduction strategy, it is achieved active control accurate, intelligent, solves in current deep hole processing equipment, manually the most mobile by experience
Auxiliary Support Position, and the situation that damping effect is undesirable.Present configuration is unique, is in long-term theory research, and combines deep
On the basis of hole machined reality, invent breakthroughly, to effectively suppression solid boring bar vibration, improve deep hole machining precision, it is achieved
The intelligent digitalized control of high-grade deep hole lathe is significant.
Claims (6)
1. a combined type Intelligent deep hole processing shock absorber, it is characterised in that: include vibration insulating system and from mobile adjustment system, institute
State vibration insulating system and include magnetic rheological liquid damper and mechanical damping system；
Described magnetic rheological liquid damper include hot-wire coil (1), supporting clapboard groove (2), vibration damping disc (4), magnetic flow liquid (19),
And the magnetic flow liquid fluid cavity (3) that vibration insulating system drive end bearing bracket (16) and vibration insulating system rear end cap (21) form, described magnetorheological
Liquid flow body cavity (3) is full of magnetic flow liquid (19), in described vibration damping disc (4) is run through and is installed on magnetic flow liquid fluid cavity (3), magnetic
The outside of rheology liquid flow body cavity (3) is provided with supporting clapboard groove (2), and described hot-wire coil (1) is wound in supporting clapboard groove (2)
On；
Described mechanical damping system includes being set in the knife bar support set (11) of drilling rod (10) outer wall, taper damping sleeve (12), cone
Block set (9), deep groove ball bearing, deep groove ball bearing seat (14), end ring (13), trim ring (8), thrust ball bearing (24), gland
(25), thrust bearing locating shaft (26), driving seat (28) and linear actuator (31), described taper damping sleeve (12) is set in cutter
Bar support set (11) outer wall, taper damping sleeve (12) is externally provided with tapered sleeve seat (9), and the front end of tapered sleeve seat (9) is fixedly installed trim ring
(8), closely cooperating between trim ring (8) and vibration insulating system drive end bearing bracket (16), the inner side of magnetic flow liquid fluid cavity (3) is provided with zanjon
Ball bearing housing (14), described deep groove ball bearing seat (14) both sides and vibration insulating system drive end bearing bracket (16) and vibration insulating system rear end cap (21)
Between closely cooperate, deep groove ball bearing seat (14) both sides shoulder hole is respectively mounted the first deep groove ball bearing (6) and the second deep-groove ball
Bearing (7), is provided with end ring (13), described axle between the inner ring of the first deep groove ball bearing (6) and the second deep groove ball bearing (7)
Holding back-up ring (13) to be installed on tapered sleeve seat (9), the rear end of described tapered sleeve seat (9) is provided with evagination chuck, and evagination chuck acts on
Outside the inner ring of two deep groove ball bearings (7), the rear end of taper damping sleeve (12) connects thrust bearing locating shaft (26), thrust axis
Holding and be arranged with thrust ball bearing (24) on locating shaft (26), thrust bearing locating shaft (26) is threadeded with driving seat (28), subtracts
Being provided with gland (25) between inner chamber and driving seat (28) of vibrating system rear end cap (21), gland (25) is provided with three grades of axis holes, the
One-level axis hole acts on the outer ring of thrust ball bearing (24), and third level axis hole acts on thrust bearing location hollow shaft (26), pressure
It is connected by screw between set (25) and driving seat (28), drives on the flange of seat (28) parallel with drilling rod (10) axis horizontal
Both sides are connected to a linear actuator (31)；
The most mobile described adjustment system includes bearing (32), servomotor (42), motor cabinet (40), shaft coupling (41), bevel gear
Reductor (33), slide block (43), line slideway (44), feeding main shaft (34), helical gear (35) and vibration insulating system base (39), institute
State bearing (32) to be made up of the gripper shoe of horizontal stand and both sides, side welding motor cabinet (40) of described gripper shoe, motor cabinet
(40) servomotor (42) is installed in side, and opposite side installs shaft coupling (41) and bevel gear reducer (33), servomotor
(42), shaft coupling (41) be connected with each other with bevel gear reducer (33), under vibration insulating system base (39), the left and right sides is along drilling rod
(10) axial direction is provided with slide block (43) and the line slideway (44) matched with slide block (43), and bevel gear reducer (33) is installed
In vibration insulating system base (39) across the center of two line slideways (44), bevel gear reducer (33) is upper connects feeding main shaft
(34), feeding main shaft (34) is provided with helical gear (35)；
Described vibration insulating system drive end bearing bracket (16) or vibration insulating system rear end cap (21) are provided with the power supply being connected with hot-wire coil (1)
Line interface channel (17), vibration insulating system drive end bearing bracket (16) fixed by screw with vibration insulating system rear end cap (21), described vibration damping dish
Dish (4) is installed on deep groove ball bearing seat (14), and described linear actuator (31) is horizontally installed on bearing (32), described bearing
(32) it is fixedly installed on vibration insulating system base (39) with vibration insulating system drive end bearing bracket (16).
A kind of combined type Intelligent deep hole processing shock absorber the most according to claim 1, it is characterised in that: described vibration damping disc
(4) longitudinal cross-section is half side in fan shape, and axial both sides offer boss and the groove of ring network trellis, and vibration damping disc (4) relies on
The location shaft shoulder on key, holding screw and deep groove ball bearing seat (14) is fixed on deep groove ball bearing seat (14).
A kind of combined type Intelligent deep hole processing shock absorber the most according to claim 1 and 2, it is characterised in that: described taper
The front-end and back-end of damping sleeve (12) interlock respectively and alternate uniform offer the wedging method not run through.
A kind of combined type Intelligent deep hole processing shock absorber the most according to claim 3, it is characterised in that: described deep-groove ball axle
Seal washer (5) it is respectively equipped with between bearing (14) both sides and vibration insulating system drive end bearing bracket (16) and vibration insulating system rear end cap (21).
A kind of combined type Intelligent deep hole processing shock absorber the most according to claim 4, it is characterised in that: described gland (25)
And it is provided with felt seal ring (23) between the inner chamber of vibration insulating system rear end cap (21).
6. a combined type Intelligent deep hole as claimed in claim 5 processing shock absorber preferably assists Support Position to control from mobile
Method, it is characterised in that being embodied as step is:
By a length ofDrilling rod discrete for N number of node, and by the drilling degree of depthDiscrete for N number of node, according to the processing hole determined
Footpath, inner and outer diameter and material properties, by formula:
Obtain the relation between auxiliary Support Position, the drilling degree of depth and drilling rod vibration, thus try to achieve optimum auxiliary Support Position and solve；
(1) determine that first node assists Support Position: when the drilling degree of depth, and take respectively,
Wherein,Thus numerical value solves and the drilling degree of depthThe optimum matchedSolve；
(2) determine and initially assist Support Position: according to the first auxiliary Support Position determined, because of depositing of preboring bullport
, will initially assist Support Position to move the most afterwards?；
(3) determine that Section Point assists Support Position: when the drilling degree of depth, and take respectively,
Wherein,Thus numerical value solves and the drilling degree of depthThe optimum matchedSolve；
(4) determine that each node assists Support Position: use said method,, obtain successively
Obtain optimum auxiliary Support Position corresponding at each drilling degree of depth node to solve；
(5) according to the preferably auxiliary Support Position determined, the displacement difference between each two adjacent supports position is determined,
Thus, determine the translational speed between every adjacent supports position, and deep hole processing cutter feed speedFor constant
Value, according to tool feeding speed, monitor the deep hole machining degree of depth, thus, set up from translational speedAnd cutter
Feed speedBetween relation；By default auxiliary support damping device speed change degreeAdjustment programme, it is achieved
Auxiliary Support Position is mutually matched automatically with the drilling degree of depth, and the preferred Support Position reaching optimal damping property catches.
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| CN107609311A (en) * | 2017-10-17 | 2018-01-19 | 西北工业大学 | Gun drilling depth optimization method based on chip removal power model |
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| CN108716975A (en) * | 2018-07-18 | 2018-10-30 | 浙江理工大学 | Use the damping experiment platform and method of the variable element rotor of piezoelectric actuator |
| CN113369968A (en) * | 2021-04-30 | 2021-09-10 | 西安交通大学 | Damping device and method for inhibiting cutting vibration of machine tool spindle and machine tool spindle |
| CN113618466A (en) * | 2021-08-23 | 2021-11-09 | 马震刚 | Digit control machine tool positioning mechanism |
| CN116765460A (en) * | 2023-08-18 | 2023-09-19 | 江苏三江电器集团股份有限公司 | Motor shaft hole machining equipment |
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