CN103350371B - Ram microgap, gantry machining center side compensates system - Google Patents
Ram microgap, gantry machining center side compensates system Download PDFInfo
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- CN103350371B CN103350371B CN201310238234.5A CN201310238234A CN103350371B CN 103350371 B CN103350371 B CN 103350371B CN 201310238234 A CN201310238234 A CN 201310238234A CN 103350371 B CN103350371 B CN 103350371B
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Abstract
Ram microgap, a kind of gantry machining center side compensates system, performed device, control pressurer system and electric control module to constitute by backlash compensation, described backlash compensation performs device and includes eight backlash compensation executors, described backlash compensation executor is provided with three Circular Thin pressure structures, and described Circular Thin pressure structure includes elastic springing thin-walled, adds pumping cavity, end cap and sealing device；Described control pressurer system is made up of plunger type pressure adjusting structure, pressure transducer, driving motor, and described driving motor drives plunger to seesaw by trapezoidal screw drive mechanism and guide rail structure, and described pressure transducer is fixed on cylinder body；Described electric control module includes pressure feedback control unit and machine Z-axis feeding coordinate signal unit.The present invention propose a kind of according to side ram Z axis feeding coordinate signal and adaptive equalization microgap microgap compensate system, this system can be effectively improved machine ram support stiffness, improves the piece surface crudy of lathe.
Description
Technical field
The present invention relates to machine tool accuracy compensation system, especially one be used for compensating the ram slip of gantry machining center side
The microgap of guide rail compensates system.
Background technology
Set in the heavy processing such as large-sized gantry numerical control machining center, vertical turning center, numerical control floor type boring and milling machine
In Bei, side's ram is one of important composition structure with saddle structure.Ram (Ram) is equipped with knife rest or main spindle box
Deng parts, have guide rail can on lathe bed or miscellaneous part the pillow functional part of movement, and side ram guide rail base
Originally it is exactly himself.The ram of existing heavy process equipment typically uses square ram structure form, with ram four sides, side
Fine grinding forms guide pass, forms sliding friction guideway with saddle inner surface, and accompanies by hydrodynamic lubrication or oil lubrication.
The microgap that sliding friction pair also exists, is to form lubricating oil film, is beneficial to the precondition of side's ram movement, with this
Meanwhile, the existence of microgap is also the key factor affecting ram with saddle fit structure, when microgap is too small,
Borderline oil film can be made to rupture, and frictional resistance is substantially increased, thus Digit Control Machine Tool Z axis feeding positioning accurate occurs
The bad phenomenon such as degree declines, the aggravation of low speed jerking motion phenomenon, slip not smooth, unstable wear even locking；And when micro-
When gap is excessive, the contact stiffness between ram and saddle weakens significantly, thus cause processing to tremble, part processing table
The problems such as face out-of-flatness, meanwhile, gap width δ itself is the factor of influence of machine finish, and along with
Stretching out of ram, the impact of positioning precision is amplified by gap width δ at double, thus cause lathe positioning precision,
Repetitive positioning accuracy reduces.
Based on above-mentioned analysis, the control of the microgap value between side's ram and saddle structure, for promoting lathe
Overall performance, machining accuracy etc. play an important role.Assembling version concrete between side's ram and saddle
Analyze, contribute to deepening the understanding of the other side's ram microgap Crack cause and proposing a kind of the most effectively side of compensation
Method, specifically assembles structure for side ram and saddle, refers to Figure of description 1 and 2, for concrete structure
Analyze, be hereinafter further described in detail in description.
Summary of the invention
In order to overcome gantry machining center side's ram to use rail plate to there is microgap, when the side's of causing ram stretches out
Support stiffness declines, and machining accuracy decline when causing machine tooling, vibration cutting, piece surface crudy decline
Etc. problem, the present invention propose a kind of according to side's ram Z axis feeding coordinate signal adaptive equalization microgap micro-
Backlash compensation system.
The technical solution adopted for the present invention to solve the technical problems is:
Ram microgap, a kind of gantry machining center side compensates system, backlash compensation perform device, Stress control system
System and electric control module are constituted, it is characterised in that described backlash compensation performs device and includes that eight backlash compensations are held
Row device, described backlash compensation executor is fixed on the little gradient wedge shape installed surface of sliding saddle of machine tool by contiguous block, institute
Stating backlash compensation executor and be provided with M Circular Thin pressure structure, described Circular Thin pressure structure includes elasticity
Deflection deformation thin-walled, adding pumping cavity, end cap and sealing device, described elastic springing thin-walled is arranged on gap and mends
Repay on the front end face of executor；Described control pressurer system is by plunger type pressure adjusting structure, pressure transducer, driving electricity
Mechanism becomes, and described plunger type pressure adjusting structure includes cylinder body, plunger, guide rail structure, trapezoidal screw drive mechanism and props up
Frame, described cylinder body is fixed on support, has cavity volume hole in described cylinder body, and front end face has oil-out, described post
Plug sleeve is contained in the cavity volume hole of described cylinder body, is provided with dynamic sealing device between described plunger and described cylinder body, described in lead
Rail structure includes that pull bar guide rail, nut connecting plate and lining, described trapezoidal screw drive mechanism include trapezoidal screw axle
With feed screw nut, before described driving motor drives plunger by described trapezoidal screw drive mechanism and described guide rail structure
Rear motion, described pressure transducer is fixed on described cylinder body, and described control pressurer system passes through bleed off circuit block will
Hydraulic oil is loaded into the adding in pumping cavity of eight backlash compensation executors；Described electric control module includes pressure feedback
Control unit and machine Z-axis feeding coordinate signal unit.
Further, the position that described backlash compensation executor installs is the fixed bit that original gap adjusts wedge shape filler rod
Putting, described backlash compensation executor is little gradient wedge, and the front end face of described backlash compensation executor is plane,
For ram contact surface, the rear end face of described backlash compensation executor is that the little gradient wedge shape on inclined-plane, with saddle is installed
Face is corresponding；Circular Thin pressure structure is set on described backlash compensation executor, described Circular Thin pressure structure
Elastic springing thin-walled is arranged on the front end face of backlash compensation executor, described end cap has sealing ring and sinks
Groove, mounting O-shaped sealing ring in described sealing ring deep gouge, described end cap is fixed by screws in backlash compensation executor
In the counterbore of rear end face, being formed and add pumping cavity, the thickness of described end cap is without departing from the rear end face of backlash compensation executor；
The described backlash compensation laminating process of executor's front end face, laminating is provided with oil cavity；Described backlash compensation is held
Pressurized oil lines and lubricant passage way it is provided with in row device.
Further, the side of cylinder block of described control pressurer system is provided with oil-in, the oiling of auxiliary oiling device
Pipeline is repeatedly kicked on the oil-in of described cylinder body by check valve, and the front end face of described cylinder body has oil-out, described
The flowline of cylinder body is connected through the pumping cavity that adds of bleed off circuit block and eight backlash compensation executors；Described plunger
In being sleeved on the cavity volume hole of described cylinder body and can seesaw, the outer ring surface of described plunger has sealing ring install heavy
Groove, described sealing ring is installed deep gouge and can be coordinated back-up ring or install Y type lip-type packing by mounting O-shaped sealing ring；Described
Guide rail structure includes pull bar guide rail, nut connecting plate and lining, and described nut connecting plate can be drawn by described lining
Described pull bar guide rail seesaws, and described trapezoidal screw drive mechanism includes trapezoidal screw axle and feed screw nut, described
Trapezoidal screw axle is rotatably fixed on support by bearing, the trapezoidal screw section of described trapezoidal screw axle and described silk
Stem nut engaged transmission, rear end and the described feed screw nut of described plunger are fixed in described nut connecting plate；Described
Driving motor to be fixed on the base plate of support, the output shaft of described driving motor is by shaft coupling and described trapezoidal screw
Axle connects.
As the preferred scheme of one: the support of described control pressurer system includes base plate, front vertical plate, back vertical plate,
Described pull bar guide rails assembling in the pull bar guide rail hole of described front vertical plate and back vertical plate, and be joined with bolts
On frame；The rear end face of described cylinder body can be provided with cylinder end caps, is provided with dust ring mounting groove in described cylinder end caps,
Described dust ring mounting groove disposes c-type dust ring；It is additionally provided with trapezoidal screw unsettled in the rear end face of described plunger
Hole；The trapezoidal screw section of described trapezoidal screw axle and described feed screw nut's engaged transmission, described feed screw nut front end hangs
The trapezoidal screw that sky stretches out is carried in the unsettled hole of trapezoidal screw of described plunger.
As the most another kind of scheme: described backlash compensation executor is fixed on the little of sliding saddle of machine tool by contiguous block
On gradient wedge shape installed surface, described contiguous block is provided with backlash compensation executor's attachment screw hole, fixing screw hole,
Gap adjusts screwed hole, and described backlash compensation executor is fixed on described by backlash compensation executor's attachment screw hole
On backlash compensation executor's installed surface of contiguous block, described contiguous block is fixed on saddle by fixing screw hole, makes
The rear end face obtaining backlash compensation executor overlaps with the little gradient wedge shape installed surface on saddle；Also set on described contiguous block
It is equipped with pressurization oil duct oil-in, oil leab oil-in, backlash compensation executor's installed surface of described contiguous block sets
It is equipped with pressurization oil channel sealing circle and deep gouge and oil leab sealing ring installation deep gouge are installed.
As preferred yet another approach: be provided with pressurization oil duct and oil leab on described backlash compensation executor,
Described pressurization oil duct by upper for backlash compensation executor M Circular Thin pressure structure to add pumping cavity through, described profit
Grease way has copper pipe and installs deep gouge in the side of backlash compensation executor, buried tube type in deep gouge installed by described copper pipe
Being provided with copper pipe, described copper pipe realizes oil leab from nearly oil-in end to the linking away from oil-in end, described profit
The oil-out of grease way is opened on the oil cavity of laminating of backlash compensation executor.
As preferred yet another approach: arrange three Circular Thins on described backlash compensation executor equally spacedly and add
Laminated structure.
As preferred yet another approach: described electric control module includes pressure feedback control unit and machine Z-axis
Feeding coordinate signal unit, described pressure feedback unit include pressure transducer, signal amplifier, data acquisition card,
PLC control module, D/A converter and interface arrangement, described PLC control module is Electrical Control of Machinery Tools system
One processing module；Described machine Z-axis feeding coordinate signal unit is the encoder of machine Z-axis feed servo-system
Or grating scale, machine Z-axis feeding coordinate signal unit provides a standard can to described PLC control module in real time
True Z axis coordinate signal, the signal that PLC control module is fed back according to Z axis coordinate signal and pressure transducer is carried out
After Bi compare, the result of process is converted into analogue signal by D/A converter, is used for controlling control pressurer system and drives
The operation of galvanic electricity machine.
Beneficial effects of the present invention is embodied in:
Use rail plate to there is microgap for gantry machining center side's ram, support when the side's of causing ram stretches out
Stiffness, when causing machine tooling, under machining accuracy decline, vibration cutting, piece surface crudy, degradation is asked
Topic, it is proposed that a kind of the microgap of adaptive equalization microgap compensates system according to side's ram Z axis feeding coordinate signal
System, field adjustable illustrates, this system can be effectively improved machine ram support stiffness, and the piece surface improving lathe adds
Working medium amount, has certain compensation effect simultaneously to Machine Tool Positioning Accuracy.
Accompanying drawing explanation
Fig. 1 is that gantry machining center ram saddle assembles structural representation
Fig. 2 is gantry machining center ram, gap adjustment wedge shape filler rod and the structural representation of saddle
Fig. 3 is that backlash compensation of the present invention performs apparatus structure schematic diagram
Fig. 4 is the structure chart of backlash compensation executor of the present invention and contiguous block
Fig. 5 is the structure chart (another attempts) of backlash compensation executor of the present invention and contiguous block
Fig. 6 is the structural perspective of backlash compensation executor of the present invention and contiguous block
Fig. 7 is the structure chart of control pressurer system of the present invention
Fig. 8 is the sectional view of control pressurer system of the present invention
Fig. 9 is the assembling structural representation of control pressurer system plunger of the present invention, nut connecting plate, feed screw nut
Figure 10 is invention backlash compensation executor's Circular Thin pressure structure sectional view
Figure 11 is the control planning flow chart of control pressurer system of the present invention and electric control module
Detailed description of the invention
In conjunction with Fig. 1～Figure 11, in the embodiment introducing ram microgap, gantry machining center side of the present invention compensation system
Before, gantry machining center square ram structure, assembly relation and ram rail plate gap adjustment side of side are first introduced
Method.
Ram uses rail plate fit form with saddle structure, and its concrete structure is as follows: combine accompanying drawing 1,2, side
Ram 1 is arranged in saddle 101, fixes with cover plate 102, forms four sides and surrounds structure.Ram joining at saddle
Sliding friction on conjunction face, has four guide supporting faces, wherein has two faces fine grinding on saddle, on the basis of face, and with
The two face cooperatively forms two other face encircling shape, i.e. work surface on another side and cover plate on saddle,
For adjustment face, gap.In existing lathe mounting technology, adjust wedge shape filler rod by gap and adjust machine ram
Microgap value δ during slip, this microgap value δ becomes one of restraining factors affecting machine finish.Ram
The original gap of rail plate adjusts, and ram is assembled on saddle it by the most commonly used method manually adjusted
After, cover plate is assembled locked.There is certain gap in ram inside saddle, adjusts wedge shape filler rod 104 with gap
Carrying out trace adjustment, main basis for estimation is ram resistance to sliding under hydrodynamic lubrication.Concrete method of adjustment and
Operation principle is shown in accompanying drawing 2, by the regulation screw on contiguous block 3, makes gap adjust wedge shape filler rod 104 at saddle
Little gradient wedge shape installed surface 103 on slide, adjust gap length, and amount of taper is 1:100.Original gap one
Denier has adjusted, and would not change.Therefore, microgap value δ i.e. completes gap and adjusts shape after wedge shape filler rod 104 adjusts
The gap become.
After describing the assembling structure of tradition gantry machining center ram, introduce the microgap of the present invention in conjunction with accompanying drawing
Compensation system.
Ram microgap, a kind of gantry machining center side compensates system, backlash compensation perform device, Stress control system
System and electric control module are constituted.
Described backlash compensation performs device and includes that eight backlash compensation executors 2, described backlash compensation executor 2 are led to
Crossing contiguous block 3 to be fixed on the little gradient wedge shape installed surface 103 of sliding saddle of machine tool, described backlash compensation executor installs
Position be original gap adjust wedge shape filler rod 104 fixed position, for design angle, described gap mend
Repaying executor 2 is on the basis of original gap adjusts wedge shape filler rod 104 contour structures, carries out Circular Thin pressurization
The redesign process of the contents such as the innovative design of structure and material, described backlash compensation executor 2 is little gradient wedge
Shape block, the front end face of described backlash compensation executor is plane, for ram contact surface, described backlash compensation executor
Rear end face be inclined-plane, corresponding with the little gradient wedge shape installed surface 103 on saddle.
Three Circular Thin pressure structures, described Circular Thin pressure structure it is provided with on described backlash compensation executor
Including elastic springing thin-walled 2-12, add pumping cavity 2-4, end cap 2-1 and sealing device, described elastic deflection
Deformation thin-walled 2-12 is arranged on the front end face of backlash compensation executor, and described end cap 2-1 has sealing ring deep gouge,
Installing an O RunddichtringO 2-13 in described sealing ring deep gouge, described end cap is fixed by screws in backlash compensation and holds
In the counterbore of row device rear end face, being formed and add pumping cavity 2-4, the thickness of described end cap is without departing from backlash compensation executor
Rear end face, its according to be the rear end face of described backlash compensation executor be installed surface, if ending cover thickness exceedes
Rear end face, can affect the normal mounting of backlash compensation executor.The described backlash compensation laminating process of executor's front end face,
Oil cavity 2-11 it is provided with on laminating；It is provided with pressurized oil lines 2-6 and lubrication in described backlash compensation executor
Oil circuit 2-7.
Described backlash compensation executor is fixed on the little gradient wedge shape installed surface of sliding saddle of machine tool by contiguous block 3, institute
State and on contiguous block, be provided with backlash compensation executor's attachment screw hole, fixing screw hole, gap adjustment screwed hole, institute
State backlash compensation executor and be fixed on the backlash compensation of described contiguous block by backlash compensation executor's attachment screw hole
On executor's installed surface, described contiguous block 3 is fixed on saddle by fixing screw hole so that backlash compensation performs
The rear end face of device overlaps with the little gradient wedge shape installed surface on saddle, adjusts the adjustment screw on screwed hole by gap
Original gap during the ram assembling of adjustment side, operation principle has described in detail.Also set up on described contiguous block
There are pressurization oil duct oil-in 2-2, oil leab oil-in 2-5, backlash compensation executor's installed surface of described contiguous block
On be provided with pressurization oil channel sealing circle and deep gouge 2-8 and oil leab sealing ring be installed deep gouge 2-9 is installed.
Pressurization oil duct 2-6 and oil leab 2-7 it is provided with, between described pressurization oil duct is incited somebody to action on described backlash compensation executor
Gap compensate upper three the Circular Thin pressure structures of executor to add pumping cavity 2-4 through, the hydraulic pressure of control pressurer system
After the pressurization oil duct oil-in 2-2 that oil is connected on described contiguous block 3 by bleed off circuit block, through internal pipeline,
Pressurization oil duct 2-6 is entered, it is achieved add the regulation of hydraulic oil pressure force value in pumping cavity after end face seal.Described lubrication
Oil duct 2-7 has copper pipe and installs deep gouge 2-3 in the side of backlash compensation executor, buries in deep gouge installed by described copper pipe
Tubular type is provided with copper pipe, and described copper pipe realizes oil leab from nearly oil-in end to the linking away from oil-in end, institute
The oil-out 2-10 stating oil leab is opened on the oil cavity 2-11 of laminating of backlash compensation executor, lubricating oil
The outlet line of pump is connected to oil leab oil-in 2-5, through internal pipeline, end face seal, oil leab 2-7,
After copper pipe, arrive the oil-out 2-10 of oil leab, it is achieved the hydrodynamic lubrication of side's ram movement.In manufacture process,
Pressurization oil duct can not intercommunication with oil leab.
Control pressurer system of the present invention, applies the Pressure Control Technology of a kind of micrometeor hydraulic system,
Described control pressurer system is made up of plunger type pressure adjusting structure, pressure transducer 5, driving motor 6, described plunger
Formula pressure adjusting structure includes cylinder body 4-1, plunger 4-5, guide rail structure, trapezoidal screw drive mechanism and support, described cylinder
Body 4-1 is fixed on the front vertical plate 4-3 of support, is provided with cavity volume hole in described cylinder body, and front end face has oil-out
4-12, in described plunger bushing is contained in the cavity volume hole of described cylinder body and can seesaw, described plunger and described outer cylinder body
Between be provided with sealing device, described guide rail structure includes pull bar guide rail 4-9, nut connecting plate 4-7 and lining 4-8,
Described nut connecting plate 4-7 can be drawn described pull bar guide rail 4-9 by described lining 4-8 and be seesawed, described ladder
Shape lead screw transmission mechanism includes that trapezoidal screw axle 4-10 and feed screw nut 4-6, described trapezoidal screw axle 4-10 pass through axle
Hold on the back vertical plate 4-4 being rotatably fixed on support, the trapezoidal screw section of described trapezoidal screw axle 4-10 and described silk
Stem nut engaged transmission, rear end and the described feed screw nut of described plunger are fixed in described nut connecting plate；Described
Driving motor 6 to be fixed on the base plate of support, the output shaft of described driving motor is by shaft coupling and described trapezoidal silk
Bar axle 4-10 connects, and described pressure transducer 5 is fixed on described cylinder body, and the interface oil of described pressure transducer leads to
Road communicates with the molten lumen pore of described cylinder body.
Hydraulic oil is loaded into adding of eight backlash compensation executors by bleed off circuit block by described control pressurer system
In pumping cavity, owing to system belongs to micrometeor hydraulic control system, the lowest to traffic requirement, therefore oil circuit connecting tube
Road uses pure titanium pipe and special fit to be attached.
For the specific constructive form of plunger type pressure adjusting structure, it is described as follows: described support includes base plate 4-2, front
Riser 4-3, back vertical plate 4-4, described pull bar guide rail 4-9 is arranged on the pull bar guide rail hole of described front vertical plate and back vertical plate
In, and be joined with bolts on support, thus it is overall to form a preferable support of rigidity, this support bears
The ability of internal tension is better than far away internal compressive stress, is ideal force structure model；Described back vertical plate
Front and rear end have bearing mounting hole, described bearing mounting hole is provided with bearing, and utilizes the bearing (ball) cover will
Bearing is fixed on back vertical plate, and described trapezoidal screw axle is arranged in above-mentioned bearing；Described driving motor 6 is by adjusting
Joint installing plate is fixed on the base plate of described support.Above-mentioned bearing can be the side of setting of a pair deep groove ball bearing
Method, it is possible to be thrust bearing for front end, rear end is the combination method to set up of deep groove ball bearing.
The side of described cylinder body 4-1 is provided with oil-in, and check valve 7 is fixed on described oil-in by jointing
On, the oil pipe of auxiliary injection system communicates by described check valve is unidirectional with the cavity volume hole of described cylinder body, assists oiling
System can use a branch road of Hydraulic Station, after the hydraulic fluid leak in cavity volume, by auxiliary injection system ftercompction.
Described cylinder body 4-1 is revolving body, is provided with cavity volume hole in described cylinder body, and front end face is provided with oil-out, cylinder
The upper side of body front end is provided with pressure transducer installed surface and threaded mounting hole, and described pressure transducer is passed by pressure
Sensor installed surface and threaded mounting hole are arranged on cylinder body, and the side of cylinder body is provided with oil-in, described cavity volume hole,
Pressure transducer installing hole, oil-in, oil-out are communicated by internal galleries；The rear end of described cylinder body is that flange is convex
Platform, described cylinder body is arranged in the cylinder body installing hole of front vertical plate 4-3 by flange boss and fastens with screw；Cylinder body
End cap fixes the rear end face of described cylinder body by screw, is provided with dust ring mounting groove in described cylinder end caps, described
Dust ring mounting groove disposes c-type dust ring.
Described plunger is stepped revolving body, and described plunger 4-5 divides plunger active section and plunger linkage section, described post
Plug active section is sleeved in the cavity volume hole of described cylinder body, and described plunger active section outer ring surface is provided with two seals circle
Installing deep gouge, described sealing ring can coordinate back-up ring by mounting O-shaped sealing ring in installing deep gouge, it is possible to installs Y type lip
Sealing ring.Described plunger linkage section is sleeved in the installing hole of feed screw nut, right on described plunger linkage section outer ring surface
Claim to have threaded securing bores；The rear end face of described plunger is additionally provided with trapezoidal screw unsettled hole 4-5-1.
Described nut connecting plate 4-7 two ends are embedded with lining 4-8, and described nut connecting plate center has feed screw nut's
Mount type hole, two ends vertical with lining inlaid hole in described nut connecting plate be symmetrically arranged with first be screwed logical
Hole；The endoporus of described feed screw nut is divided into before and after two sections, and leading portion is the installing hole of plunger linkage section, and back segment is trapezoidal
Female thread, described feed screw nut's outer ring surface is symmetrically arranged at the front end with locating surface, described locating surface has the second screw thread
Fixed via, described feed screw nut is fixed in the mount type hole of described nut connecting plate by locating surface；When described
The plunger linkage section of plunger is installed in the installing hole of described feed screw nut, and described feed screw nut is installed to described nut
Time in the mount type hole of connecting plate, described first be screwed through hole, second be screwed the spiral shell on through hole and plunger
Stricture of vagina fixing hole overlaps, and utilizes nut connecting plate trip bolt 4-11 three to be fastened, simultaneously before feed screw nut's outer ring surface
The locating surface of end setting, after being conducive to assembling and realizing assembling, radial direction is fixing.
Described trapezoidal screw axle 4-10 is multidiameter, and leading portion is trapezoidal screw section, and stage casing is bearing construction section, rear end
For shaft coupling linkage section.Described trapezoidal screw section and feed screw nut's engaged transmission, stretch out the trapezoidal of feed screw nut's part
Screw mandrel section is unsettled in the trapezoidal screw unsettled hole 4-5-1 of described plunger 3.Described driving motor by shaft coupling with
The shaft coupling linkage section of trapezoidal screw axle is connected, under the effect driving motor, it is achieved move before and after plunger, complete
Becoming and add decompression process, described driving motor uses motor or the servomotor of high pulling torque of high pulling torque.
Described electric control module includes pressure feedback control unit and machine Z-axis feeding coordinate signal unit, described
Pressure feedback unit includes that pressure transducer, signal amplifier, data acquisition card, PLC control module, D/A turn
Parallel operation and interface arrangement, described pressure transducer is that technical grade spreads silicon type pressure transmitter, described pressure transducer
On be configured with oil pressure value display module, described PLC control module is one of Electrical Control of Machinery Tools system process mould
Block；Described machine Z-axis feeding coordinate signal unit is encoder or the grating scale of machine Z-axis feed servo-system,
Machine Z-axis feeding coordinate signal unit provides a Z axis seat accurately can to described PLC control module in real time
Mark signal, after PLC control module compares according to the signal that Z axis coordinate signal and pressure transducer feed back, will
The result processed is converted into analogue signal by D/A converter, drives the fortune of motor for controlling control pressurer system
OK.
The operation principle of this embodiment is as follows: the compensation of ram microgap, gantry machining center side, backlash compensation hold
Row device completes, the Circular Thin pressure structure of backlash compensation executor, under the effect of internal pressure oil, can produce
Accurately, support stiffness is high, controlled, repeatably Light deformation, for the microgap of the side's of compensation ram, Circular Thin
Pressure structure occurs bending elasticity to deform under by internal pressure effect, from principle angle analysis, is based on material bullet
Property deformation principle and thin plate minor deflection bending theoretical, the characteristic of Circular Thin pressure structure generation deflection deformation most critical
Mainly by 2 points, first, deflection deformation compensation dosage is directly proportional to internal pressure value, and this is Circular Thin pressure structure
The basis controlled as compensating executor；Second, the deformation after Circular Thin pressure structure compensates has the highest
Support stiffness, this is to prevent machine tooling from shaking, and promotes the key factor of lathe cutting ability.For Circular Thin
The principle of pressure structure deformation and experimental analysis, be not specifically described.
The control of backlash compensation executor's Circular Thin pressure structure internal hydraulic pressure oil pressure, real by control pressurer system
Existing, owing to this system belongs to micrometeor hydraulic system, conventional technical solutions according to the invention realize Stress control,
Compared with traditional control pressurer system, have and prevent overflow waste, avoid that hydraulic system temperature rise is excessive, pressure regulation is smart
Degree is accurate, be easy to the advantages such as assembling maintenance.
And backlash compensation executor and the cooperative cooperating of control pressurer system, by electric control module control.Through machine
After bed field adjustable, can draw out Z axis coordinate signal and the most suitable compensating curve of force value, this compensating curve is
The programme controlled core of PLC control system.When lathe works, side's ram is fed into a Z axis coordinate signal,
PLC control system can send a signal to driving motor, makes control pressurer system reach required force value, and
Force value, by the signals collecting of pressure transducer, feedback, forms an effective closed loop, makes Stress control
The regulation precision of system is more accurate and the quickest.
Claims (5)
1. ram microgap in gantry machining center side's compensates a system, backlash compensation perform device, control pressurer system
And electric control module is constituted, it is characterised in that described backlash compensation performs device and includes that eight backlash compensations are held
Row device, described backlash compensation executor is fixed on the little gradient wedge shape installed surface of sliding saddle of machine tool by contiguous block,
Described backlash compensation executor is provided with Circular Thin pressure structure, and described Circular Thin pressure structure includes elasticity
Deflection deformation thin-walled, adding pumping cavity, end cap and sealing device, described elastic springing thin-walled is arranged on gap
Compensate on the front end face of executor；Described control pressurer system by plunger type pressure adjusting structure, pressure transducer, drive
Galvanic electricity mechanism becomes, and described plunger type pressure adjusting structure includes cylinder body, plunger, guide rail structure, trapezoidal screw driver
Structure and support, described cylinder body is fixed on support, has cavity volume hole in described cylinder body, and front end face has oil-out,
Described plunger bushing is contained in the cavity volume hole of described cylinder body, is provided with movable sealing dress between described plunger and described cylinder body
Putting, described guide rail structure includes pull bar guide rail, nut connecting plate and lining, described trapezoidal screw drive mechanism bag
Including trapezoidal screw axle and feed screw nut, described driving motor is by described trapezoidal screw drive mechanism and described guide rail
Structure drives plunger to seesaw, and described pressure transducer is fixed on described cylinder body, described control pressurer system
By bleed off circuit block, hydraulic oil is loaded into the adding in pumping cavity of eight backlash compensation executors；Described electric-controlled
Molding block includes pressure feedback control unit and machine Z-axis feeding coordinate signal unit；
The position that described backlash compensation executor installs is the fixed position that original gap adjusts wedge shape filler rod, institute
Stating backlash compensation executor is little gradient wedge, and the front end face of described backlash compensation executor is plane, for cunning
Pillow contact surface, the rear end face of described backlash compensation executor is the little gradient wedge shape installed surface on inclined-plane, with saddle
Corresponding；Circular Thin pressure structure is set on described backlash compensation executor, described Circular Thin pressure structure
Elastic springing thin-walled is arranged on the front end face of backlash compensation executor, described end cap has sealing ring and sinks
Groove, mounting O-shaped sealing ring in described sealing ring deep gouge, described end cap is fixed by screws in backlash compensation and performs
In the counterbore of device rear end face, formed and add pumping cavity, after the thickness of described end cap is without departing from backlash compensation executor
End face；The described backlash compensation laminating process of executor's front end face, laminating is provided with oil cavity；Described
Gap is provided with pressurized oil lines and lubricant passage way in compensating executor；
The side of cylinder block of described control pressurer system is provided with oil-in, and the oiling pipeline of auxiliary oiling device passes through
Check valve is repeatedly kicked on the oil-in of described cylinder body, and the front end face of described cylinder body has oil-out, described cylinder body
Flowline is connected through the pumping cavity that adds of bleed off circuit block and eight backlash compensation executors；Described plunger is set with
In the cavity volume hole of described cylinder body and can seesaw, the outer ring surface of described plunger has sealing ring install heavy
Groove, described sealing ring is installed deep gouge and can be coordinated back-up ring or install Y type lip-type packing by mounting O-shaped sealing ring；
Described guide rail structure includes pull bar guide rail, nut connecting plate and lining, and described nut connecting plate passes through described lining
Can seesaw along described pull bar guide rail, described trapezoidal screw drive mechanism includes trapezoidal screw axle and screw mandrel spiral shell
Mother, described trapezoidal screw axle is rotatably fixed on support by bearing, the trapezoidal screw of described trapezoidal screw axle
Section and described feed screw nut's engaged transmission, the rear end of described plunger and described feed screw nut are fixed on described nut even
On fishplate bar；Described driving motor is fixed on the base plate of support, and the output shaft of described driving motor passes through shaft coupling
It is connected with described trapezoidal screw axle.
2. ram microgap, gantry machining center side as claimed in claim 1 compensates system, it is characterised in that: described pressure
The support of Force control system includes base plate, front vertical plate, back vertical plate, and described pull bar guide rails assembling is at described front vertical plate
With the pull bar guide rail hole of back vertical plate, and it is joined with bolts on support；The rear end face of described cylinder body can be pacified
Equipped with cylinder end caps, in described cylinder end caps, it is provided with dust ring mounting groove, described dust ring mounting groove disposes
C-type dust ring；The unsettled hole of trapezoidal screw it is additionally provided with in the rear end face of described plunger；Described trapezoidal screw axle
Trapezoidal screw section and described feed screw nut's engaged transmission, the unsettled trapezoidal screw stretched out in described feed screw nut front end holds
It is placed in the unsettled hole of trapezoidal screw of described plunger.
3. ram microgap, gantry machining center side as claimed in claim 1 compensates system, it is characterised in that: between described
Gap is compensated executor and is fixed on the little gradient wedge shape installed surface of sliding saddle of machine tool by contiguous block, on described contiguous block
Being provided with backlash compensation executor's attachment screw hole, fixing screw hole, gap adjustment screwed hole, described gap is mended
Repay executor and be fixed on the backlash compensation executor of described contiguous block by backlash compensation executor's attachment screw hole
On installed surface, described contiguous block is fixed on saddle by fixing screw hole so that after backlash compensation executor
End face overlaps with the little gradient wedge shape installed surface on saddle；Pressurization oil duct oil-feed it is additionally provided with on described contiguous block
Mouth, oil leab oil-in, backlash compensation executor's installed surface of described contiguous block is provided with pressurization oil duct close
Seal is installed deep gouge and is installed deep gouge with oil leab sealing ring.
4. ram microgap, gantry machining center side as claimed in claim 1 compensates system, it is characterised in that: between described
Gap compensates and arranges three Circular Thin pressure structures equally spacedly on executor.
5. ram microgap, gantry machining center side as claimed in claim 1 compensates system, it is characterised in that: described electricity
Gas control module includes pressure feedback control unit and machine Z-axis feeding coordinate signal unit, described pressure feedback
Unit include pressure transducer, signal amplifier, data acquisition card, PLC control module, D/A converter and
Interface arrangement, described PLC control module is a processing module of Electrical Control of Machinery Tools system；Described lathe Z
Axle feeding coordinate signal unit is encoder or the grating scale of machine Z-axis feed servo-system, and machine Z-axis enters
There is provided a Z axis coordinate signal accurately in real time can to described PLC control module to coordinate signal unit,
After PLC control module compares according to the signal that Z axis coordinate signal and pressure transducer feed back, by process
Result is converted into analogue signal by D/A converter, drives the operation of motor for controlling control pressurer system.
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| CN201310238234.5A CN103350371B (en) | 2013-06-14 | 2013-06-14 | Ram microgap, gantry machining center side compensates system |
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| CN104325352A (en) * | 2013-11-12 | 2015-02-04 | 柳州正菱重型数控机床有限公司 | Ram mounting compensation device |
| CN103753393A (en) * | 2014-01-28 | 2014-04-30 | 瓦房店金北轴承制造有限公司 | Lubrication fulcrum enabling bearing super-finishing machine to eliminate fulcrum marks |
| CN105710698A (en) * | 2016-03-24 | 2016-06-29 | 浙江大学 | Sliding saddle used for square guide rail backlash compensation experiment and application method |
| NO20201324A1 (en) * | 2018-05-24 | 2020-12-02 | Baker Hughes Holdings Llc | Transducers including laser etched substrates |
| CN112525510B (en) * | 2020-11-30 | 2021-10-29 | 吉林大学 | Method for testing reliability of servo power tool rest loaded by electro-hydraulic-magnetic hybrid |
| CN113070827B (en) * | 2021-03-15 | 2024-05-14 | 广州飞机维修工程有限公司 | Repairing and positioning device for aircraft seat slide rail beam |
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