CN104595283B - Digit Control Machine Tool Hydraulic System Reliability assay device and test method - Google Patents
Digit Control Machine Tool Hydraulic System Reliability assay device and test method Download PDFInfo
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- CN104595283B CN104595283B CN201510036148.5A CN201510036148A CN104595283B CN 104595283 B CN104595283 B CN 104595283B CN 201510036148 A CN201510036148 A CN 201510036148A CN 104595283 B CN104595283 B CN 104595283B
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a kind of Digit Control Machine Tool Hydraulic System Reliability assay device and test method, aim to solve the problem that Digit Control Machine Tool hydraulic system does not has the problem of reliability test and method of testing, Digit Control Machine Tool Hydraulic System Reliability assay device include tested hydraulic system mounting portion, simulation loading part and automatically control part.No. 1 hydraulic cylinder branch road of the cylinder manifold of tested hydraulic system mounting portion is connected with the hydraulic cylinder rodless cavity oil pipe of simulation loading part, and No. 2 hydraulic cylinder branch roads of cylinder manifold are connected with hydraulic cylinder rod chamber oil pipe；The next programmable controller PLC and No. 1 three-position four-way electromagnetic directional valve of tested hydraulic system mounting portion, No. 2 three-position four-way electromagnetic directional valve, No. 3 three-position four-way electromagnetic directional valve that automatically control part are connected with No. 4 three-position four-way electromagnetic directional valve electric wires；The A/D capture card and the pressure transducer that automatically control part are connected with pull pressure sensor electric wire.Present invention also offers tested Hydraulic System Reliability test method.
Description
Technical field
The present invention relates to a kind of assay device for reliability field and reliability test method, more properly
Say, the present invention relates to a kind of number that numerical control machine tool hydraulic system can be loaded and carry out reliability test
Control machine tool hydraulic system reliability test and test method.
Background technology
Digit Control Machine Tool is to improve country's manufacture level and the basis of equipment, is to weigh a National Industrial to send out
Reach the important symbol of level, overall national strength.The statistical result of nearly 5 years shows, Digit Control Machine Tool market presents state
Product equipment occupation rate is low, and the state that import volume remains high, its main cause is domestic numerical control lathe
Reliability is the highest, and integrity problem becomes one of critical bottleneck of restriction domestic numerical control machine industry development,
The reliability improving domestic numerical control lathe is very urgent.Along with information-based and the development of automatization, hydraulic technique
More and more extensive in Digit Control Machine Tool sector application, be mainly used in auxiliary clamping workpiece, pallet changer indexing,
The actions such as the rotation of turret indexing and tool magazine tool-changing mechanical arm.Through statistics: hydraulic pressure system subordination numerical control machine
The Main Weak Links of bed reliability, improves its reliability level for improving Digit Control Machine Tool whole aircraft reliability water
Flat significant.
The existing research about Digit Control Machine Tool Hydraulic System Reliability technology mainly uses fault mode and impact point
Fault mode, the failure cause of hydraulic system are carried out by the analysis method such as (FMEA), fault tree analysis (FTA)
Statistical analysis, finds its weak link, or uses various fuzzy forecast method that it is carried out fault rate prediction,
And then take corresponding preventive measure to reduce its fault rate.But the realization of said method needs substantial amounts of fault
Data and mantenance data.Digit Control Machine Tool is as process equipment, and the acquisition of its fault data has on-the-spot reliability to try
Test and two kinds of methods of laboratory reliability test.The method obtaining fault data by field reliability test,
Substantial amounts of manpower, financial resources and material resources need to be consumed.Can be received with quick obtaining fault by laboratory reliability test
According to and mantenance data, and experimental enviroment is controlled, and process of the test is reproducible.
Statistical result in recent years shows, the chife failure models of Digit Control Machine Tool hydraulic system have leakage of oil, blocking,
Output pressure is not enough, and above-mentioned fault all will produce considerable influence to the reliability of Digit Control Machine Tool.It addition,
The fault of hydraulic system mostly occurs in the part such as hydraulic component, pipeline, and the fault of hydraulic cylinder is little.
Domestic existing hydraulic test bench does not possess load simulated loading function, is only capable of carrying out the performance inspection of Hydraulic Elements
Surveying, it is impossible to carry out reliability test truly, the data therefore obtained and Practical Project have difference.
To sum up, it is necessary to for Digit Control Machine Tool design of Hydraulic System, there is adding of simulation hydraulic pressure system for field load working condition
Carry the reliability test of function, thus carry out laboratory reliability test, in order to excite leakage of oil, blocking,
The typical faults such as output pressure is not enough, the fault data of short time acquisition hydraulic system and mantenance data, discovery
The weak link of hydraulic system, and carry out Curve guide impeller, user and Digit Control Machine Tool manufacturing enterprise are undoubtedly
It is highly profitable.
Summary of the invention
The technical problem to be solved is to overcome current domestic Digit Control Machine Tool hydraulic system the most reliably
Property assay device and the problem of method for testing reliability, it is provided that a kind of Digit Control Machine Tool Hydraulic System Reliability examination
Experiment device and test method.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that realization: described numerical control machine
Bed Hydraulic System Reliability assay device includes that tested hydraulic system mounting portion, simulation loading part are with automatic
Control part；
Described tested hydraulic system mounting portion includes cylinder manifold, pressure transducer；Simulation loading part bag
Include hydraulic cylinder, pull pressure sensor；Automatically control part and include that the next programmable controller PLC is adopted with A/D
Truck.
No. 1 hydraulic cylinder branch road on cylinder manifold uses oil pipe to be connected with the hydraulic fluid port of hydraulic cylinder rodless cavity, cylinder manifold
On No. 2 hydraulic cylinder branch roads use oil pipes to be connected with the hydraulic fluid port of hydraulic cylinder rod chamber；The next Programmable Logic Controller
4 outfans of PLC respectively with No. 1 three-position four-way electromagnetic directional valve in tested hydraulic system mounting portion,
No. 2 three-position four-way electromagnetic directional valve, No. 3 three-position four-way electromagnetic directional valve and No. 4 three-position four-way electromagnetic directional valve
On electric magnet terminals electric wire connect；Two signal input parts of A/D capture card are successively and pressure transducer
It is connected with the output line electric wire of pull pressure sensor.
Described tested hydraulic system mounting portion is arranged on ground, and simulation loading is partially installed on by test solution
On ground on the right side of pressure system mounting portion, automatically control the ground being partially installed on simulation loading partial right side
On.Described simulation loading part includes bearing part, static loading part, dynamic load part and Horizon
Ferrum.Bearing part, static loading part all use with dynamic load part and are bolted on ground black iron；Hold
The right-hand member of hydraulic cylinder piston rod carried in part is connected with the left end bolt of pull pressure sensor, and pressure senses
The right-hand member of device is connected with the left end bolt of the load bar in static loading part, the prolongation in static loading part
Cylinder right side be connected with the cam contact in dynamic load part, the axis of rotation of hydraulic cylinder piston rod with add
Carrying the axis of rotation coaxial line of bar, the axis of rotation of load bar and the rotation centerline of cam intersect vertically.
Bearing part described in technical scheme also includes hydraulic cylinder bearing and hydraulic cylinder FE Tiler.Described hydraulic pressure
Cylinder bearing is fixed by bolts on ground black iron, and hydraulic cylinder FE Tiler is fixed by bolts on hydraulic cylinder bearing, hydraulic pressure
Cylinder is placed in the inner chamber of hydraulic cylinder bearing and the formation of hydraulic cylinder FE Tiler.Hydraulic cylinder bearing is by the semicircular ring of upper end
Body forms with the splayed supporting walls of lower end, and the upper end of splayed supporting walls is circular arc opening, and splayed is propped up
It is respectively arranged with bolt hole, the circular arc opening of splayed supporting walls upper end on lower margin before and after support wall lower end
Being connected with the external cylindrical surface of semi-circular ring, the axis of rotation of semi-circular ring is vertical with splayed supporting walls,
Semi-circular ring be the most flatly provided with strip flange, strip flange is provided with spiral shell
Keyhole, the strip flange in semi-circular ring is identical with the strip flange arrangement arranged on hydraulic cylinder FE Tiler,
Be provided with on hydraulic cylinder FE Tiler 2 for the through hole installing oil pipe, the position of two through hole respectively with hydraulic cylinder
The fuel feed hole of rodless cavity aligns with the fuel feed hole of rod chamber, and the axis of the piston rod right-hand member of hydraulic cylinder is processed spiral shell
Stricture of vagina blind hole.
Static loading part described in technical scheme include load bar, big end cap, No. 1 disc spring group, small end cover,
Spring, small box, big casing, No. 2 disc spring groups and extending.Small end cover uses and is bolted to small box
On left side；The right-hand member of load bar is arranged in the inner chamber of small end cover and small box composition, extending bolt
It is fixed on the right side of the right tank wall of small box, and stretches out outside the right tank wall of big casing, the gyroaxis of extending
The axis of rotation conllinear of the centre bore on line and the right tank wall of small box, the left side of the load bar shaft shoulder and small end cover
Right side contact connect, during load bar shaft shoulder right-hand rod portion is sequentially inserted on spring, the right tank wall of small box
In the groove of central hole and extending, on the left of the load bar shaft shoulder bar portion be sequentially inserted into small end cover small end cover centre bore,
No. 1 disc spring group, the big end cap central bore of big end cap outside stretching out the inner chamber of big end cap and big casing composition；Load
Blind hole it is threaded, the shaft shoulder outer round surface of load bar and little case on the centrage of the left end of bar extension
The cylindrical cavity wall of body is matched in clearance, the structure peace that load bar, spring, small end cover and small box form
It is contained in big casing, and is respectively mounted No. 1 disc spring group and No. 2 on the left side of small end cover and the right side of small box
Disc spring group；Big end cap is fixed by bolts on the left side of big casing, and No. 2 disc spring groups are sleeved on extending,
The inner cylinder face of big casing is that gap is joined with the outer cylinder surface of the casing assembly that small end cover and small box form
Closing, No. 1 disc spring group, spring, No. 2 disc spring groups are in compressive state.
Dynamic load part described in technical scheme includes motor support base, motor and cam.Motor support base
It is made up of the splay supporting leg of the supporting walls of the rectangle of upper end with lower end, the supporting walls of rectangle and lower end
Splayed supporting leg is connected, and the center of supporting walls is provided with the central through hole installing motor output shaft,
The bolt hole being provided with fixing motor evenly around of central through hole, supporting walls and splayed supporting leg institute
Vertical in plane.Motor is horizontally fixed on the supporting walls of motor support base upper end, and the output shaft of motor is from support
Stretching out in the central through hole of wall, cam is arranged on the output shaft of motor and uses nut to fix.
Tested hydraulic system mounting portion described in technical scheme also includes experimental desk and oil-Absorbing Sheets lay plate.
On the bottom surface of the intermediate layer portable plate that tested hydraulic system is fixed on the intermediate layer pull plate of experimental desk；Pressure passes
On the upper surface of the underlying activities plate that sensor is horizontally mounted at experimental desk bottom pull plate；On pressure transducer
Place oil-Absorbing Sheets lay plate, flatly 1 layer of oil-Absorbing Sheets of lay, the area energy of oil-Absorbing Sheets on oil-Absorbing Sheets lay plate
Cover the area that tested hydraulic system projects in the horizontal plane, between oil-Absorbing Sheets and tested hydraulic system minimum point
Vertical dimension be 5～10cm；Cylinder manifold is fixed on the upper table of the top layer portable plate of the top layer pull plate of experimental desk
On face, No. 1 three-position four-way electromagnetic directional valve, No. 2 three-position four-way electromagnetic directional valve, No. 3 3-position 4-way electromagnetism
Reversal valve and No. 4 three-position four-way electromagnetic directional valve are installed on cylinder manifold, No. 1 3-position 4-way electricity on cylinder manifold
Magnetic reversal valve A branch road, No. 2 three-position four-way electromagnetic directional valve A branch roads, No. 3 three-position four-way electromagnetic directional valve A
Branch road and No. 4 three-position four-way electromagnetic directional valve A branch roads and the working hole A of No. 1 three-position four-way electromagnetic directional valve,
The working hole A of No. 2 three-position four-way electromagnetic directional valve, the working hole A and 4 of No. 3 three-position four-way electromagnetic directional valve
The working hole A of number three-position four-way electromagnetic directional valve No. 1 3-position 4-way for being in sealing contact connection, on cylinder manifold
Solenoid directional control valve B branch road, No. 2 three-position four-way electromagnetic directional valve B branch roads, No. 3 three-position four-way electromagnetic directional valve
B branch road and No. 4 three-position four-way electromagnetic directional valve B branch roads and the working hole B of No. 1 three-position four-way electromagnetic directional valve,
The working hole B of No. 2 three-position four-way electromagnetic directional valve, the working hole B and 4 of No. 3 three-position four-way electromagnetic directional valve
The working hole B of number three-position four-way electromagnetic directional valve is for being in sealing contact connection.
Cylinder manifold described in technical scheme is cuboid structural member, and the internal water level land of cylinder manifold is provided with A
Working connection and B working connection, the upper end within cylinder manifold is provided with No. 1 hydraulic cylinder leading to hydraulic cylinder vertically
Branch road and No. 2 hydraulic cylinder branch roads, the lower end of No. 1 hydraulic cylinder branch road and No. 2 hydraulic cylinder branch roads is successively and the main oil of A
Road connects with B working connection, and the lower end within cylinder manifold is provided with 8 and No. 1 3-position 4-way electromagnetism vertically
Reversal valve, No. 2 three-position four-way electromagnetic directional valve, No. 3 three-position four-way electromagnetic directional valve, No. 4 3-position 4-way electricity
A branch road and the B branch road of magnetic reversal valve connection, i.e. No. 1 three-position four-way electromagnetic directional valve A branch road, No. 2 three
Four-way electromagnetic reversing valve A branch road, No. 3 three-position four-way electromagnetic directional valve A branch roads, No. 4 3-position 4-way electromagnetism change
To valve A branch road, No. 1 three-position four-way electromagnetic directional valve B branch road, No. 2 three-position four-way electromagnetic directional valve B branch roads,
No. 3 three-position four-way electromagnetic directional valve B branch roads and No. 4 three-position four-way electromagnetic directional valve B branch roads, No. 1 three four
Electric change valve A branch road, No. 2 three-position four-way electromagnetic directional valve A branch roads, No. 3 3-position 4-way electromagnetic switch
Valve A branch road and the upper end of No. 4 three-position four-way electromagnetic directional valve A branch roads and A working connection connect, No. 1 three four
Electric change valve B branch road, No. 2 three-position four-way electromagnetic directional valve B branch roads, No. 3 3-position 4-way electromagnetic switch
Valve B branch road and the upper end of No. 4 three-position four-way electromagnetic directional valve B branch roads and B working connection connect, cylinder manifold
Left side wall, for closing, the right side wall of cylinder manifold is provided with the connector of A working connection and B working connection.
Compared with prior art the invention has the beneficial effects as follows:
Digit Control Machine Tool Hydraulic System Reliability assay device the most of the present invention uses spring, cam to tested
Hydraulic system is simulated the dynamic and static load of actual condition and loads, according to different operating modes, load amplitude and
Frequency-adjustable, load source precision is high, and it is convenient to obtain, and it is convenient to implement.
Digit Control Machine Tool Hydraulic System Reliability assay device the most of the present invention can independently and simultaneously load static state
Load and dynamic load, and the reliability level of hydraulic system under various working can be tested.
Digit Control Machine Tool Hydraulic System Reliability assay device the most of the present invention has automatic control system.Can
State for extended periods at no worker monitor runs automatically, and monitors the fault such as insufficient pressure, leakage of oil, thus reduces
Labor intensity.Test can expose and excite product bug, and reliability growth and assessment for product provide practicality
Basic data.
Digit Control Machine Tool Hydraulic System Reliability assay device the most of the present invention is provided with pull pressure sensor,
The size of simulation load can be detected in real time, it is achieved monitoring in real time and the warning of force value deficiency fault.
Digit Control Machine Tool Hydraulic System Reliability assay device the most of the present invention is provided with pressure transducer, energy
This typical fault of leakage of oil is reported to the police, and doubtful leakage of oil point can be judged by the oil mark of oil-Absorbing Sheets.
Digit Control Machine Tool Hydraulic System Reliability assay device the most of the present invention can different for structure, have
The hydraulic system of 1～4 branch road carries out reliability test, for the testing stand more than 4 branch roads, only needs slightly
Add repacking can test, embody motility and the versatility of this device.
Digit Control Machine Tool Hydraulic System Reliability test method the most of the present invention is rigorous, program is perfect, is suitable for
In tests such as reliability detection and reliability predictions.
Accompanying drawing explanation
The present invention is further illustrated below in conjunction with the accompanying drawings:
Fig. 1 is on Digit Control Machine Tool Hydraulic System Reliability assay device structure of the present invention composition front view
Full sectional view；
Fig. 2 is that the axle of Digit Control Machine Tool Hydraulic System Reliability assay device structure of the present invention composition surveys throwing
Shadow figure；
Fig. 3 is hydraulic system structure group in Digit Control Machine Tool Hydraulic System Reliability assay device of the present invention
The schematic diagram become；
Fig. 4 is the control principle block diagram of Digit Control Machine Tool Hydraulic System Reliability assay device of the present invention；
Fig. 5 is the FB(flow block) of Digit Control Machine Tool Hydraulic System Reliability test method of the present invention；
Fig. 6-a is confluxing employed in Digit Control Machine Tool Hydraulic System Reliability assay device of the present invention
The front view of plate structure composition；
Fig. 6-b is confluxing employed in Digit Control Machine Tool Hydraulic System Reliability assay device of the present invention
The A direction view of plate structure composition；
In figure: 1. pressure transducer, 2. experimental desk, 3. oil-Absorbing Sheets lay plate, the most tested hydraulic system, 5a.1
Number three-position four-way electromagnetic directional valve, 5b.2 three-position four-way electromagnetic directional valve, 5c.3 3-position 4-way electromagnetism changes
To valve, 5d.4 three-position four-way electromagnetic directional valve, 6. cylinder manifold, 7. hydraulic cylinder bearing, 8. hydraulic cylinder FE Tiler,
9. hydraulic cylinder, 10. pull pressure sensor, 11. load bars, 12. big end caps, No. 13.1 disc spring groups, 14. is little
End cap, 15. springs, 16. small box, 17. big casings, No. 18.2 disc spring groups, 19. extendings, 20. motors
Bearing, 21. motors, 22. cams, 23. ground black irons, 24. switch boards, 25.A working connection, 26.B working connection.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is explained in detail:
The Frequent Troubles position that facts have proved Digit Control Machine Tool hydraulic system is oil pipe and hydraulic component, its typical case
Fault mode have: leakage of oil, blocking, output pressure is not enough, thus, it is necessary to for Digit Control Machine Tool hydraulic pressure
Oil pipe and the hydraulic component part of system carry out reliability screening or improvement.According to the requirement of reliability test,
Need to simulate the real working condition of hydraulic system, simultaneously as the time of reliability test is longer, it is impossible to adopt as far as possible
Carry out test observation by artificial method, it requires that assay device can run automatically, automatic fault detection
And warning.Digit Control Machine Tool hydraulic system often more than one branch road, but test time, can only single-path testing, respectively
Must not have an impact between branch road, so at the trial, it is desirable to can automatically switch, i.e. realize each branch switch
Independent control, meet the reliability test once carrying out multiple branch circuit hydraulic system as far as possible, and with a test
Many set hydraulic systems just can be done experiment by device, to facilitate so changing tested hydraulic system in assay device,
Layout should be reasonable in assay device for the most tested hydraulic system；Tested hydraulic system is carried out reliability test
Method should be the most effective.
In sum, tested hydraulic system to be completed reliability test task and need to solve following problem:
1. the automatic operation of test；
2. the load of pair tested hydraulic system loads；
3. the detection of fault, including the detection to oil leakage fault, the detection to output pressure deficiency fault, blocking
It is not enough that fault can show as power output, and therefore plugging fault can be detected by detection power output deficiency；
4. the realization of multiple branch circuit switching；
The dismounting of the most tested hydraulic system and layout；
6. the most effective reliability test method.
Propose technical solutions according to the invention for the problems referred to above, it is an object of the invention to provide one and tear open
The reliability test of the Digit Control Machine Tool hydraulic system that dress is convenient, practical, it is possible to according to given test side
Method is effectively realized the reliability test of tested hydraulic system.Digit Control Machine Tool hydraulic system of the present invention can
By tested hydraulic system mounting portion, simulation loading part by property assay device and automatically control part and form.
Tested hydraulic system mounting portion is arranged on the ground in left side, and simulation loading is partially installed on by test solution
On ground on the right side of pressure system mounting portion, automatically control the ground being partially installed on simulation loading partial right side
On.
One. tested hydraulic system mounting portion
Refering to Fig. 1 and Fig. 2, described tested hydraulic system mounting portion includes pressure transducer 1, experimental desk
2, oil-Absorbing Sheets lay plate 3,4, No. 1 three-position four-way electromagnetic directional valve 5a of tested hydraulic system, No. 2 three four
Electric change valve 5b, No. 3 three-position four-way electromagnetic directional valve 5c, No. 4 three-position four-way electromagnetic directional valve 5d and
Cylinder manifold 6.
Experimental desk 2 has four root posts to support, and one is divided into three layers of desktop, and every layer of desktop is easy disassembly
The pull plate of rectangle；Pull plate is made up of portable plate and 2 pieces of fixed plates, and portable plate sets along longitudinal cross section
The cross section of two long edge positions being set to T-shaped iso-cross-section, i.e. portable plate is symmetrical inversed l-shaped；2 pieces
The long limit of fixed plate is staggered relatively, and the cross section of two long edge positions of 2 pieces of fixed plates is symmetrical L-shaped, portable plate
Limit long with the two of 2 pieces of fixed plates, two long limits corresponding, portable plate is placed on the fixed plate that 2 block structures are identical
On the long limit (mouth) of inboard step；2 pieces of fixed plates of every layer of desktop the most in a welding manner with column
Fixing, all upright being fixed on ground in the way of buried of four root posts；At upper two-layer desktop lower right corner
It is provided with 1 through hole, for allowing the circuit connecting each assembly and pipeline pass through.
On the upper surface of the underlying activities plate that pressure transducer 1 is arranged on the bottom pull plate of experimental desk 2；For
Bearing gravity, pressure transducer 1 is that horizontal positioned is installed；Oil-Absorbing Sheets lay is placed on pressure transducer 1
Plate 3, oil-Absorbing Sheets lay plate 3 tiles 1 layer of oil-Absorbing Sheets, it is ensured that horizontal lay, and the area of oil-Absorbing Sheets is wanted enough
Greatly so that the area of oil-Absorbing Sheets can cover tested hydraulic system 4 and be occupied the face of (projection) in the horizontal plane
Long-pending, the vertical dimension between the minimum point of oil-Absorbing Sheets and tested hydraulic system 4 ensures 5～10cm.
Tested hydraulic system 4 is fixed on the 2nd (middle) layer of the 2nd (middle) layer pull plate of experimental desk 2
On the bottom surface of portable plate, fixing wanting reliable, tries one's best level in position.
Cylinder manifold 6 is custom-made, need to be fixed on the upper table of the portable plate of the top layer pull plate of experimental desk 2
On face, cylinder manifold 6 is laid No. 1 three-position four-way electromagnetic directional valve 5a, No. 2 three-position four-way electromagnetic directional valve
5b, No. 3 three-position four-way electromagnetic directional valve 5c and No. 4 three-position four-way electromagnetic directional valve 5d, to make during installation to connect
Seal at Kou.
Refering to the front view that Fig. 6-a and Fig. 6-b is cylinder manifold 6 structure and A direction view, cylinder manifold 6 is for long
Cube shape structural member, the internal water level land of cylinder manifold 6 is provided with two working connections i.e. A working connection 25 and B master
Oil circuit 26, A working connection 25 is closing with the left end of B working connection 26, and right-hand member is opening, converges
It is provided with eight holes on stream plate 6.
No. 1 three-position four-way electromagnetic directional valve A branch road, No. 2 3-position 4-way electromagnetic switch it are provided with on cylinder manifold 6
Valve A branch road, No. 3 three-position four-way electromagnetic directional valve A branch roads and No. 4 three-position four-way electromagnetic directional valve A branch roads,
Be provided with No. 1 three-position four-way electromagnetic directional valve B branch road on cylinder manifold, No. 2 three-position four-way electromagnetic directional valve B are propped up
Road, No. 3 three-position four-way electromagnetic directional valve B branch roads and No. 4 three-position four-way electromagnetic directional valve B branch roads,
Refering to Fig. 2 and Fig. 3, figure illustrates the oil circuit within cylinder manifold 6 and is connected with the pipeline of other parts
Relation；A working connection 25 connects with No. 1 hydraulic cylinder branch road leading to hydraulic cylinder 9 rodless cavity, B working connection 26
It is connected with No. 2 hydraulic cylinder branch roads leading to hydraulic cylinder 9 rod chamber, wherein four holes and the A on cylinder manifold 6
Working connection 25 connects, and four additional hole connects with B working connection 26, and eight holes are distinguished directly and No. 1 three
Four-way electromagnetic reversing valve 5a, No. 2 three-position four-way electromagnetic directional valve 5b, No. 3 three-position four-way electromagnetic directional valve 5c
It is in sealing contact with B mouth with the A mouth of No. 4 three-position four-way electromagnetic directional valve 5d and is connected.Wherein: and A working connection
Four holes of 25 connections be No. 1 three-position four-way electromagnetic directional valve 5a, No. 2 three-position four-way electromagnetic directional valve 5b,
No. 3 three-position four-way electromagnetic directional valve 5c and the A mouth of No. 4 three-position four-way electromagnetic directional valve 5d, and B working connection
Four holes of 26 connections be No. 1 three-position four-way electromagnetic directional valve 5a, No. 2 three-position four-way electromagnetic directional valve 5b,
No. 3 three-position four-way electromagnetic directional valve 5c and the B mouth of No. 4 three-position four-way electromagnetic directional valve 5d.
I.e. A working connection on cylinder manifold 6 25 by No. 1 three-position four-way electromagnetic directional valve A branch road, No. 2 three
Position four-way electromagnetic reversing valve A branch road, No. 3 three-position four-way electromagnetic directional valve A branch roads and No. 4 3-position 4-way electromagnetism
One end of reversal valve A branch road and the working hole A of No. 1 three-position four-way electromagnetic directional valve 5a, No. 2 3-position 4-ways
The working hole A of solenoid directional control valve 5b, the working hole A of No. 3 three-position four-way electromagnetic directional valve 5c and No. 4 three
The working hole A of four-way electromagnetic reversing valve 5d is for being in sealing contact connection；B working connection 26 on cylinder manifold is by 1
Number three-position four-way electromagnetic directional valve B branch road, No. 2 three-position four-way electromagnetic directional valve B branch roads, No. 3 3-position 4-ways
Solenoid directional control valve B branch road and one end of No. 4 three-position four-way electromagnetic directional valve B branch roads and No. 1 3-position 4-way electricity
The working hole B of magnetic reversal valve 5a, the working hole B of No. 2 three-position four-way electromagnetic directional valve 5b, No. 3 three four
The working hole B of the working hole B of electric change valve 5c and No. 4 three-position four-way electromagnetic directional valve 5d is for sealing
Contact connects.
On cylinder manifold 6 except with No. 1 three-position four-way electromagnetic directional valve 5a, No. 2 3-position 4-way electromagnetic switch
Valve 5b, No. 3 three-position four-way electromagnetic directional valve 5c, No. 4 three-position four-way electromagnetic directional valve 5d are with hydraulic cylinder 9 even
Outside logical interface, cylinder manifold 6 is without other oil-in and oil-out.
Assume Digit Control Machine Tool Hydraulic System Reliability assay device of the present invention at full capacity, the most tested hydraulic pressure
System 4 has 4 branch roads, the oil inlet pipe of each branch road in tested hydraulic system 4 to connect No. 1 three four respectively
Electric change valve 5a, No. 2 three-position four-way electromagnetic directional valve 5b, No. 3 three-position four-way electromagnetic directional valve 5c, 4
The import P mouth of number three-position four-way electromagnetic directional valve 5d, the oil return pipe of each branch road in tested hydraulic system 4
Connect respectively No. 1 three-position four-way electromagnetic directional valve 5a, No. 2 three-position four-way electromagnetic directional valve 5b, No. 3 three four
Electric change valve 5c, the oil return inlet T mouth of No. 4 three-position four-way electromagnetic directional valve 5.
Non-at full capacity time, when having 3 branch roads such as tested hydraulic system, pipeline connect with at full capacity time indistinction,
Simply No. 4 three-position four-way electromagnetic directional valve 5d centre positions to be remained at, the most unnecessary branch road is in closedown
State, by that analogy.
Tested hydraulic system mounting portion uses said structure can solve following problem:
1. the tested hydraulic leak problem of detection:
Lay oil-Absorbing Sheets, oil-Absorbing Sheets immediately below tested hydraulic system 4 in tested hydraulic system mounting portion
Indirectly it is placed on pressure transducer 1.Time tested hydraulic system 4 oil leakage phenomenon is obvious, i.e. oil-Absorbing Sheets
Gravity is advanced the speed when becoming big, and the rate of pressure change of pressure transducer also can strain greatly mutually.Due to control automatically
Pressure transducer 1 is arranged by part processed, when rate of pressure change is more than 1N/min, is then judged as
The leakage of oil of tested hydraulic system 4, and then oil leakage alarm circuit ON reporting to the police, the most just can detect tested hydraulic pressure
The oil leakage fault of system 4.Further, since tested hydraulic system 4 and oil-Absorbing Sheets are horizontal positioned, and hang down
Straight distance between 5～10cm, very likely drip after the leakage of oil of tested hydraulic system 4 to leakage of oil point just under
Side, so can determine whether, on oil-Absorbing Sheets, the center (surface) of oil mark is most probable doubtful leakage of oil point,
Emphasis inspection is needed during improvement.
2. the switching problem of multiple branch circuit:
Refering to Fig. 3, tested hydraulic system 4 is if any 2 to four branch roads, and each branch road connects envelope in the middle of respectively
The three-position four-way electromagnetic directional valve of enclosed, each three-position four-way electromagnetic directional valve herein is used as the switch of branch road,
Automatically control part can each three-position four-way electromagnetic directional valve independently be controlled, when YV1 obtains electric, the first branch road
Connecting, during dead electricity, the first branch road is closed；When YV3 obtains electric, the second branch road is connected, during dead electricity, and the second branch road
Close；When YV5 obtains electric, the 3rd branch road is connected, and during dead electricity, the 3rd branch road is closed；When YV7 obtains electric, the 4th
Branch road is connected, and during dead electricity, the 4th branch road is closed.In automatically controlling part, establishment PLC interlocks program,
Before the most a certain branch road is connected, other three branch roads must shut off, and so realizes the control of multiple branch circuit and cuts
Change, it addition, when tested hydraulic system 4 branch road is more than 4, can accordingly by customization cylinder manifold 6 again,
Increase three-position four-way electromagnetic directional valve, regroup PLC program to respond requirement, when tested hydraulic system 4
When branch road is less than 4, to correspondingly regroup PLC program and make unnecessary three-position four-way electromagnetic directional valve
I.e. closed mode the most in an intermediate position responds requirement.
The dismounting of the most tested hydraulic system and the problem of layout:
Owing to tested hydraulic system 4 is uncertain, so changing relatively more frequent, in order to meet easy accessibility,
Every layer of heretofore described experimental desk 2 all uses the pull plate of easy disassembly, changes tested hydraulic system 4
Time only portable plate need to be taken out, pull down tested hydraulic system 4, the tested hydraulic system 4 more renewed, then work
Dynamic plate is placed in fixed plate, and dismounting space is enough；Tested hydraulic system 4 is fixed on the pull plate of level
Easily ensure that tested hydraulic system 4 is horizontally disposed, be more beneficial for the accurate judgement of suspicion leakage of oil point；It addition, examination
Test and at the lower right corner of table 2 upper two layers, be both provided with through hole, each branch road oil pipe of tested hydraulic system 4
Insert in the hole, and then respectively with No. 1 three-position four-way electromagnetic directional valve 5a, No. 2 three-position four-way electromagnetic directional valve
5b, No. 3 three-position four-way electromagnetic directional valve 5c, No. 4 three-position four-way electromagnetic directional valve 5d connect, and can make oil circuit
Arrange in good order.
Two. simulation loading part
Refering to Fig. 1 and Fig. 2, described simulation loading part includes bearing part, static loading part, dynamically
Loading section and ground black iron 23.
Bearing part, static loading part, dynamic load part are each attached on ground black iron 23；Bearing part
Pull pressure sensor 10 and bolt-connection, hydraulic cylinder 9 piston in bearing part is used with static loading part
The axis of rotation coaxial line of the load bar 11 in the axis of rotation of bar and static loading part, static loading part
Connection is contacted with the cam 22 in dynamic load part；Bearing part and the coaxial line of static loading part and convex
The rotation centerline of wheel 22 intersects vertically.
Described bearing part includes hydraulic cylinder bearing 7, hydraulic cylinder FE Tiler 8, hydraulic cylinder 9 and pressure sensing
Device 10.
Described hydraulic cylinder bearing 7 is fixed by bolts on ground black iron 23, and hydraulic cylinder FE Tiler 8 is fixed with bolt
On hydraulic cylinder bearing 7；Hydraulic cylinder bearing 7 is by the splayed supporting walls group of the semi-circular ring of upper end Yu lower end
Becoming, the upper end of splayed supporting walls is circular arc opening, before and after splayed supporting walls lower end on lower margin respectively
Being provided with bolt hole, the circular arc opening of splayed supporting walls upper end is linked to be with the external cylindrical surface of semi-circular ring
Integrally, the axis of rotation of semi-circular ring is vertical with splayed supporting walls, distinguishing axially outside of semi-circular ring
Flatly it is provided with strip flange, strip flange is provided with bolt hole, the strip in semi-circular ring
Flange is identical with the strip flange arrangement arranged on hydraulic cylinder FE Tiler 8；At design and working fluid cylinder pressure bearing 7
Will be according to the shape Design and Machining of the concrete hydraulic cylinder 9 selected with during hydraulic cylinder FE Tiler 8, it is to be ensured that hydraulic pressure
Cylinder 9 can be placed in the inner chamber of hydraulic cylinder bearing 7 and hydraulic cylinder FE Tiler 8 formation；The inner chamber formed is ladder
Hole, can effectively limit the hydraulic cylinder 9 play on piston rod movement direction, and hydraulic cylinder 9 is at vertical piston
The restriction of the play in the bar direction of motion is dependent on the inner chamber of hydraulic cylinder bearing 7 and hydraulic cylinder FE Tiler 8 formation
The size in aperture realizes.In a word, hydraulic cylinder bearing 7 and hydraulic cylinder FE Tiler 8 can ensure that hydraulic cylinder 9
Fixing in the horizontal direction, the level of a hydraulic cylinder 9 to be guaranteed, two hydraulic cylinders 9 to be guaranteed itself can not be altered
Dynamic.It addition, have 2 on hydraulic cylinder FE Tiler 8 for by the through hole of oil pipe, the position difference of two through hole
The fuel feed hole of the rodless cavity of corresponding hydraulic cylinder 9 and the fuel feed hole of rod chamber.The connected mode of hydraulic cylinder 9 oil pipe
Referring particularly to Fig. 3, two main roads within cylinder manifold 6 respectively with oil pipe be connected to hydraulic cylinder 9 rod chamber and
Rodless cavity, these two oil pipes the most corresponding by above-mentioned 2 holes, need the work at hydraulic cylinder 9 before installation
Process tapped blind hole on the axis of stopper rod right-hand member, and select tension and compression the most with bolts with threaded hole
Force transducer 10, it is ensured that with bolt, pull pressure sensor 10 can be fixed on the piston rod of hydraulic cylinder 9, draw
The holding wire of pressure transducer 10 accesses and automatically controls on an input port of the PLC in part.
Described static loading part include load bar 11,12, No. 1 disc spring group 13 of big end cap, small end cover 14,
Spring 15, small box 16, big casing 17, No. 2 disc spring groups 18, extendings 19 form.
Described big casing 17 is fixed by bolts on the ground black iron 23 on the right side of hydraulic cylinder bearing 7.Load bar
11 is the middle part straight-bar class formation part with the shaft shoulder；Big end cap 12 and small end cover 14 are for being provided with in big end cap
Heart through hole and the dish class formation part of small end cover central through hole, big end cap central through hole and small end cover central through hole
Evenly distributed around have big bolt of cover through hole and small end cover bolt hole；Small box 16 is to arrange along axis
There is the cylindrical structure part of shoulder hole；Extending 19 is for arrange reeded cylindrical structure part along axis.
Small end cover 14 is fixed by bolts on the left side of small box 16；The right-hand member of load bar 11 is arranged on little
In the inner chamber that end cap 14 and small box 16 form, the left side of load bar 11 shaft shoulder and the right side of small end cover 14
End contact connects, and load bar 11 shaft shoulder right-hand rod portion is sequentially inserted on spring 15, the right tank wall of small box 16
Centre bore and extending 19 groove in, the length in load bar 11 shaft shoulder right-hand rod portion should ensure that any feelings
Condition lower spring 15 all can not be outside eject lever, and the length of extending 19 should ensure that under any circumstance can stretch out
Outside the big right tank wall of casing 17, the degree of depth of extending 19 groove should ensure that under any circumstance load bar 11
All can not collide with extending 19 bottom portion of groove, even if the rigidity of spring 15 should ensure that in tested hydraulic system 4
It is not fully compressed for spring time maximum at output pressure, and the deflection of now spring 15 is less than hydraulic pressure
The range of cylinder 9 piston rod, so can guarantee that hydraulic cylinder 9 power output is fully loaded on spring 15.Add
The bar portion carrying another (left) side of bar 11 shaft shoulder is sequentially inserted into the small end cover centre bore of small end cover 14, No. 1 disc spring
Group 13, the big end cap central bore of big end cap 12 and stretch out big end cap 12 with the inner chamber of big casing 17 composition outside；
The length in the bar portion of another (left) side of load bar 11 shaft shoulder should ensure that in any case, and No. 1 disc spring group 13 is all
Blind hole can not be threaded, it is ensured that energy outside eject lever on the centrage of the left end of load bar 11 extension
It is fixedly connected with pull pressure sensor 10 with bolt, during connection, it is ensured that the piston rod of hydraulic cylinder 9 and loading
The additional bending moment when axiality of bar 11 is to reduce loading as far as possible.It addition, the shaft shoulder outer round surface of load bar 11
It is matched in clearance with the cylindrical cavity wall of small box 16, so, add the interior of small box to be ensured in man-hour 16
The roughness of the outer cylinder surface of cavity wall and load bar 11 shaft shoulder.Load bar 11, spring 15, small end cover 14,
The structure of small box 16 composition is arranged in big casing 17, and in the both sides of small end cover 14 with small box 16
It is respectively mounted No. 1 disc spring group 13 and No. 2 disc spring groups 18；Big end cap 12 is fixed by bolts to big casing 17
On left side, extending 19 is fixed by bolts on the right side of the right tank wall of small box 16, extending 19
The axis of rotation conllinear of the centre bore on axis of rotation and the right tank wall of small box 16, extending 19 inserts No. 2
In disc spring group 18 and stretch out outside the big right tank wall of casing 17, the right side of extending 19 all the time with cam 22
Left surface keep contact, it addition, the inner cylinder face of big casing 17 forms with small end cover 14 and small box 16
The outer cylinder surface of casing assembly be matched in clearance, so, add to ensure man-hour big casing 17 inner chamber,
Small end cover 14 and the roughness of small box 16 outer round surface.In order to keep each several part to contact all the time, No. 1 disc spring
Group 13,15, No. 2 disc spring groups 18 of spring are in compressive state when mounted, i.e. give suitable pretension
Power.Load bar 11, big end cap 12, small end cover 14, small box 16 are equal with extending 19 axis of rotation and big
The axis of rotation conllinear of casing 17 endoporus.
Described dynamic load part includes motor support base 20, motor 21 and cam 22.
Motor support base 20 is fixed by bolts on the ground black iron 23 of static loading partial right side, motor 21 level
It is fixed on the upper end of motor support base 20, the axis of rotation of motor 21 and the load bar 11 in static loading part
Axis of rotation intersect vertically, cam 22 is arranged on the output shaft of motor 21, cam 22 and motor 21
Use bonded between output shaft and realize the circumferentially positioned of cam 22, using nut screwing clamping to realize cam 22
Axial location, be perpendicular to lateral symmetry of the cam 22 of cam 22 axis of rotation and the axis of load bar 11
Coplanar.To sum up, can ensure that load is loaded into a certain bar of the axis of rotation by extending 19 by cam 22
Diametrically.During initial position, the centre of gyration of cam 22 is minimum, i.e. with the distance of extending 19 right side
Extending 19 right side and the low point cantact of cam 22.
Simulation loading part uses said structure can solve following problem:
1. the fault that the tested hydraulic system output pressure of detection is not enough:
The piston rod of hydraulic cylinder 9 is fixing with pull pressure sensor 10 to be connected, when test is carried out, and hydraulic cylinder 9
Piston rod stretch out and put in place after, pull pressure sensor 10 is started working, and lasting detection hydraulic cylinder 9 is defeated
Exert oneself, and automatically control incoming for pressure signal in part, if output pressure is not enough, automatically control portion
The warning circuit divided will be reported to the police.The work of pull pressure sensor 10 was stopped before to hydraulic cylinder 9 backhaul order
Make.It addition, the power of the hydraulic cylinder 9 of bearing part in simulation loading part is directly transmitted by piston rod, because of
This installs pull pressure sensor 10 at the piston rod afterbody of hydraulic cylinder 9, measures accurate and effective.
Quiet, the loading of dynamic load of the most tested hydraulic system:
The operating pressure of Normal hydraulic system typically all one meets the steady state value of working condition requirement, so power output
Constant, and in system, oil pressure meets outside actual demand, according to Newton's third law, outside to executive component
Power be equal with the power output of executive component, so how external force changes the oil within hydraulic system
Pressure impact is unconspicuous, so hydraulic system is the most only done the pressurize test of static state.But Digit Control Machine Tool
Operating mode changeable, not only produce static force when it normally works, the most also can produce dynamic force, therefore do
During the reliability test of Digit Control Machine Tool hydraulic system, need to simulate actual condition as far as possible.For meeting actual condition,
The present invention adds dynamic load part on the basis of static loading.In the present invention, by customization cam 22
Shape determine the amplitude excursion of dynamic force, by adjusting dynamic load part in the flexible side of spring 15
Position upwards determines the amplitude size of dynamic force, by changing with the rotating speed of Frequency Converter Control motor 21
The frequency of dynamic force, so can simulate multiple amplitude and frequency dynamic force not etc., and then for numerical control machine
The loading of bed hydraulic system.Defect is owing to cam is slew gear, there is mechanical periodicity, so not
Can simulate acyclic load, the oil pressure within hydraulic system is affected not by change based on said external power
Significantly mechanism, during simulation dynamic load, can be simulated loading just for the canonical parameter of dynamic load,
As: load with the maximum of dynamic force, minima, peak frequency, the combination of minimum frequency.Static loading
Part and dynamic load part are individually to control, and during work, its concrete load mode is: tested hydraulic pressure system
4 a certain branch roads of uniting are started working, and the piston rod of hydraulic cylinder 9 stretches out, and promote load bar 11 compression spring 15,
When being compressed to a certain degree, the power of spring 15 is equal to the power output of hydraulic cylinder 9, and the piston rod of hydraulic cylinder 9 stops
Only stretch out, now, for actual condition is solely subjected to the branch road of static load, only need to keep in this case
Regular hour carries out pressurize test, and the piston rod of hydraulic cylinder 9 is return afterwards；But for actual condition holds
By the branch road of dynamic load, then need to add dynamic load in pressure maintaining period, i.e. spring 15 compression puts it in place
After, automatically controlling part control motor 21 and power on, cam 22 is started working, and extending 19 can be along with cam
The action of 22, small box 16 can compress or discharge spring 15 along with the action of extending 19, thus change
Becoming the spring 15 active force to load bar 11, this active force is passed to the piston of hydraulic cylinder 9 by load bar 11
Bar, so continuing the regular hour carries out dynamic pressurize test, rear motor 21 stop action, hydraulic cylinder
The piston rod of 9 is return.Wherein, No. 1 disc spring group 18 cushioning effects of 13, No. 2 disc spring groups, will not rigidity
Collision, also will not make cam 22 stuck.It addition, based on said structure, present invention may also apply to research dynamic
The impact on tested hydraulic system 4 internal oil pressure of the state load.
Three. automatically control part
The described fault detect of Digit Control Machine Tool Hydraulic System Reliability assay device, dynamic load load, electricity
The unlatchings of magnet valve etc. control all by automatically controlling part realization.
Described automatically control part include switch board 24, display, input equipment, upper industrial computer, under
Position programmable controller PLC, converter and A/D capture card；Wherein: display, input equipment, upper
Industrial computer, the next programmable controller PLC, converter are arranged in switch board 24 with A/D capture card.
Refering to Fig. 4, the up direction of described the next programmable controller PLC and upper industrial computer communication,
Down direction respectively with converter, No. 1 three-position four-way electromagnetic directional valve 5a, No. 2 three-position four-way electromagnetic directional valve
5b, No. 3 three-position four-way electromagnetic directional valve 5c, No. 4 three-position four-way electromagnetic directional valve 5d, tested hydraulic system 4,
Oil leakage alarm circuit, force value warning circuit carry out communication；Particularly as follows: the next programmable controller PLC has 4
Individual outfan respectively with No. 1 three-position four-way electromagnetic directional valve 5a in tested hydraulic system mounting portion, No. 2
Three-position four-way electromagnetic directional valve 5b, No. 3 three-position four-way electromagnetic directional valve 5c and No. 4 3-position 4-way electromagnetic switch
The terminals electric wire of the electric magnet on valve 5d connects；The mode of connection of tested hydraulic system 4 is according to tested hydraulic pressure
The system mode of connection in concrete Digit Control Machine Tool determines；Oil leakage alarm circuit is made up of an alarm lamp,
One pole of alarm lamp connects the signal output part of the next programmable controller PLC, and another pole of alarm lamp connects bottom
The common port of programmable controller PLC；Force value warning circuit is also made up of an alarm lamp, alarm lamp
One pole connects another signal output part of the next programmable controller PLC, and another pole of alarm lamp connects bottom can
The common port of programmable controller PLC；A/D capture card is used to gather pressure transducer 1, pull pressure sensor
The signal of 10, and by its incoming upper industrial computer, control program, control instruction in upper industrial computer rely on
The input equipment inputs such as keyboard, in result output to display, wherein, A/D capture card is selected and is ground China's data
Capture card PCI-1710.
Wherein, it is to be worked out by VC++ that upper industrial computer controls interface, control to input on interface static load,
The test parameterss such as dynamic load, oil leakage alarm parameter, force value alarm parameters and test period, upper industrial computer
On the one hand communication is carried out with A/D capture card, by incoming for the signal of pressure transducer 1 and pull pressure sensor 10
In VC++ program, on the other hand upper industrial computer passes through serial communication with the next Programmable Logic Controller, and bottom can
Programmable controller can complete following task:
1. the rotating speed of motor 21 is changed by controlling converter；
No. 2.1 control three-position four-way electromagnetic directional valve 5a, No. 2 three-position four-way electromagnetic directional valve 5b, No. 3 three
Each three-position four-way electromagnetic directional valve in four-way electromagnetic reversing valve 5c, No. 4 three-position four-way electromagnetic directional valve 5d
Obtain electric and dead electricity, thus control the opening and closing of tested hydraulic system 4 branch road.The next programmable control of establishment
During the PLC ladder diagram of device processed, it is to be ensured that the interlocking of break-make between branch road, the most a certain branch road open before other
Three branch roads necessarily be in closed mode, thus solves the problem that multiple branch circuit switches；
3. control the automatic operation of the tested each branch road of hydraulic system 4；
Result is defeated by bottom after the signal collecting A/D capture card judges by the most upper industrial computer
Programmable controller PLC, the output line of pressure transducer access A/D capture card a signal defeated
Entering end, the signal of the pressure transducer that the next programmable controller PLC collects according to A/D capture card controls
The break-make of oil leakage alarm circuit, the output line of pull pressure sensor access A/D capture card another
Signal input part, the pull pressure sensor that the next programmable controller PLC collects according to A/D capture card
The break-make of signal control force value warning circuit, thus the problem solving fault detect.Concrete, work as quilt
During examination hydraulic system 4 serious leakage of oil, i.e. the pressure signal of the pressure transducer 1 that A/D capture card collects becomes
When changing speed more than 1N/min, upper industrial computer will produce input to the next programmable controller PLC and control
Signal, and then the next programmable controller PLC sends high level voltage output signal, so that oil leakage alarm is electric
Road is connected, and corresponding alarm lamp lights warning；To the control of force value warning circuit in like manner.
To sum up, the VC++ program of establishment in upper industrial computer is relied on, to Digit Control Machine Tool hydraulic pressure of the present invention
The each several part of System Reliability Test device realizes automatically controlling, and includes successively tested hydraulic system 4 self
Automatically control, each branch road of tested hydraulic system 4 leads to the automatic control starting between hydraulic cylinder 9 with closing
What system, dynamic load loaded automatically control, detection and the early warning automatically of leakage of oil and output pressure deficiency fault,
The control of above-mentioned a few part same VC++ programming, collaborative work, thus solve test and automatically run
Problem.
Digit Control Machine Tool Hydraulic System Reliability assay device is used to carry out the side of tested Hydraulic System Reliability test
Method:
Tested Hydraulic System Reliability is tried by the Digit Control Machine Tool Hydraulic System Reliability assay device described in application
Testing, its step is as follows:
1. reliability test prepares
1) tested hydraulic system load is gathered
The ultimate principle of reliability test simulates actual condition, the reliability of hydraulic system to be carried out exactly
First have to gather the load data of tested hydraulic system 4 before test.Due to the numerical control belonging to tested hydraulic system
The operating mode of lathe is complicated and changeable, and the load of tested hydraulic system is not invariable, need to select tested for this
The typical condition of hydraulic system and typical user, gather the load condition of tested hydraulic system.Former according to cutting
Reason understands in working angles typically can produce static load and dynamic load.
(1) static load
Gather the oil pressure p of the different operating modes of hydraulic system1..., pi... pn, corresponding working time bag
Include t1..., ti..., tn(or working flow q1..., qi... qn), i.e. static load spectrum；
(2) dynamic load
Hydraulic system such as bears dynamic loading, needs the p of tested hydraulic system 4 during collecting work1' ..., pi' ...,
pn', the corresponding working time includes t1' ..., ti' ... tn' (or working flow q1' ..., qi' ... qn'),
Load minimum frequency fmin, load peak frequency fmax, load amplitude F1... Fi..., Fn, the most dynamically carry
Lotus is composed.
2) pressure loss of tester for testing hydraulic system
The pressure loss of Digit Control Machine Tool Hydraulic System Reliability assay device refers to test No. 1 3-position 4-way respectively
Solenoid directional control valve 5a, No. 2 three-position four-way electromagnetic directional valve 5b, No. 3 three-position four-way electromagnetic directional valve 5c, 4
The system of number three-position four-way electromagnetic directional valve 5d and cylinder manifold 6 and the pipeline composition being connected to hydraulic cylinder 9
Pressure loss Δ p1, Δ p2, Δ p3, Δ p4.
Before using described Digit Control Machine Tool Hydraulic System Reliability assay device, use fuel pressure gage test tested
The output pressure of the oil inlet pipe of each branch road of hydraulic system 4 and in communication after No. 1 hydraulic cylinder branch road
Output pressure, both differences are the pressure loss of this branch road.
3) selection of assay device Elastic part
According to the load minimum frequency f collectedmin, load peak frequency fmax, select No. 1 disc spring group 13,
No. 2 disc spring groups 18, the stiffness coefficient k of spring 15.
4) the loading cam of Selection experiment device
According to maximum load amplitude F collectedmax, minimum load amplitude Fmin, formulate the wheel of cam 22
Wide.Stiffness coefficient k according to spring 15, it is known that load amplitude FiCorresponding stroke xi=Fi/ k, therefore, respectively
The stroke x that load amplitude is corresponding1、x2..., xi... xn, thus the summit of cam can be separately designed out from circle
Distance d of the heart is x1+ r ..., xi+ r ... xn+r。
5) establishment assay device automatic control program
According to all load informations collected, industrial computer is worked out control program, including static state
Load amplitude, static load load time and dynamic load amplitude, dynamic loading frequencies, dynamic load load
Time and force value early warning value, the setting of oil leakage alarm value parameter.
6) installation test device
Loading section install time successively load choose No. 1 disc spring group 13, small end cover 14, spring 15,2
Number disc spring group 18, extending 19, cam 22；The initial position of cam ensures just to contact with extending 19；
13, No. 2 disc spring group 18 compressive states to be in of No. 1 disc spring group.
2. reliability test
The purpose of Digit Control Machine Tool Hydraulic System Reliability test: find that it is at aspects such as design, material and techniques
Various defects, through analyzing and improving so that it is reliability is progressively increased, be finally reached predetermined reliable
Property level；For improving the Combat readiness of product, improving Mission Success rate, minimizing maintenance and support expense offer
Information；It is confirmed whether to meet the reliability quantification requirement of regulation.Therefore reliability test is divided into reliability demonstration
Test or evaluation test and reliability growth test.Either which class reliability test all needs to simulate actual condition,
Reliability test is carried out according to the following steps for this.
1) startup automatically controls part
Under the control automatically controlling part, the first branch road of tested hydraulic system 4 starts to simulate actual condition
Work.
2) the first branch road reliability test
If the first branch road of tested hydraulic system 4 is solely subjected to dead load, then stretches out stroke at hydraulic cylinder 9 and arrive
After Wei, remaining stationary as, carrying out oil pressure is p1、p2…pi…pn, every day (24 hours) corresponding oil pressure
The protracted test time is 24 × t1/Σ(ti)、24×t2/Σ(ti)、24×ti/Σ(ti)、24×tn/Σ(ti) (or
Working flow q1、q2…qi…qn) pressurize test, hydraulic cylinder 9 backhaul after each pressurize off-test；
If the first branch road of tested hydraulic system 4 bears dynamic loading, then stretch out Overstroke at hydraulic cylinder 9
Afterwards, remaining stationary as, under the control automatically controlling part, motor 21 starts, at fmin～fmaxRandom
Frequency fiUnder carry out 24 × t1’/Σ(ti)、24×t2’/Σ(ti)、24×ti’/Σ(ti)、24×tn’/Σ(ti) (or
Working flow q1’、q2’…qi’…qn') dynamic loading experiment, 3 times of mean time between failures working time MTBF
The rear motor 21 of (or mean time between failures working flow) stops action.The first of tested hydraulic system 4
Branch road oil pressure P each timei' with frequency fiLoad test time 24 × ti’/Σ(ti') (or qi') terminate.Every time
Pressurize off-test hydraulic cylinder 9 backhaul, cam is returned to home position.
3) the first branch road reliability test terminates
Automatically control part and close tested by the YV1 dead electricity controlling No. 1 three-position four-way electromagnetic directional valve 5a
First branch road of hydraulic system 4, the YV3 of No. 2 three-position four-way electromagnetic directional valve 5b obtains the tested hydraulic pressure of electric-opening
Second branch road of system 4.
4) second and third and four branch roads to tested hydraulic system 4 respectively repeat steps 1)～2).4th branch road
After off-test, return the first branch road and repeat test.
3. reliability test and analysis
1) 1 in carrying out reliability test step)～3) step time, observe oil-Absorbing Sheets, if having substantially
Oil mark, the doubtful leakage of oil point that obvious oil mark is corresponding is shut down, and improves process, including: change pipe
Road or replacing hydraulic component.
2) 1 in carrying out reliability test step)～3) step time, if force value warning circuit report to the police
Or oil leakage alarm circuit alarm, then hard stop, improve process to doubtful leakage of oil point, analyzes pressure
Not enough reason, and improve process.
3) according to reliability assessment standard GB/T 23568.1-2009 " machine tool functional component reliability assessment ",
Data in process of the test are carried out statistical analysis, obtains the reliability level of Digit Control Machine Tool hydraulic system.
4. the tested hydraulic system after pair improvement carries out reliability test
As carry out for Hydraulic System Reliability growth test, fault need to be analyzed, adopt after finding fault
Take corrective measure, afterwards the tested hydraulic system 4 after improving repeated 1 in reliability test step)～3)
Step.
5. off-test
1) when total reliability test time works no less than 3 times of mean time between failures of tested hydraulic system 4
Between MTBF (or mean time between failures working flow).
2) if only carrying out reliability assessment and checking test, only above-mentioned 1～3 steps need to be carried out.
3), time if carried out reliability growth test, need to carry out comprising total Test step 1～4, until it reaches
Expectation index.Having tested rear manual shut-down, each several part returns to home position, closes and automatically controls part.
Refine above-mentioned test procedure, define the Digit Control Machine Tool Hydraulic System Reliability test used in the present invention
Device carries out the method for testing of reliability for Digit Control Machine Tool hydraulic system, and the method simple process figure is refering to figure
5, this test method is rigorous comprehensively, thus the problem solving the formulation of reasonable efficiency test method.
In specific implementation process, the device in embodiment can carry out accepting or rejecting or modification as required:
When each branch road of tested hydraulic system 4 all has only to apply static load, can be by dynamic load part
Remove；When each branch road quantity of tested hydraulic system 4 is less than 4, the 3-position 4-way electromagnetism that can would sit idle for changes
Remove to valve, and hole corresponding on cylinder manifold 6 is blocked.
But these changes the most or not whole structure.
It addition, heretofore described embodiment be for the ease of these those skilled in the art it will be appreciated that
With the application present invention, it is the embodiment of a kind of optimization, or perhaps the most concrete a kind of technical scheme,
It is only applicable to the reliability test of branch road quantity Digit Control Machine Tool hydraulic system within the specific limits, circuitry number
The reliability test of amount Digit Control Machine Tool hydraulic system outside scope can use the technical scheme being basically unchanged,
But the quantity of parts used will change therewith, as increased the quantity etc. of three-position four-way electromagnetic directional valve, therefore this
Invention is not limited in embodiment the description of this kind of more specific technical scheme.
The present invention can also have other embodiments, such as: is changed into by experimental desk 2 by identical the standing of six roots of sensation structure
Post supports；For another example: change the control program automatically controlling part, the pressure of pressure transducer 1 is changed speed
Rate changes rate of pressure change into more than 0.5N/min (or other values) alarm more than 1N/min alarm；
For another example: in order to be able to allow the accurate off-position of cam, motor 21 is replaced by the motor that band standard is stopped；For another example: in order to carry
1 layer of oil-Absorbing Sheets of paving described in invention are changed into spreading 3 layers by high oil absorbing effect.
In a word, if relevant technical staff makes in the case of adhering to basic technical scheme of the present invention it is not required to
The most within the scope of the present invention through the equivalent structure change of creative work or various amendment.
Claims (6)
1. a Digit Control Machine Tool Hydraulic System Reliability assay device, including automatically controlling part, automatically controls
Part includes the next programmable controller PLC and A/D capture card；It is characterized in that, described Digit Control Machine Tool
Hydraulic System Reliability assay device also includes tested hydraulic system mounting portion and simulation loading part；
Described tested hydraulic system mounting portion includes cylinder manifold (6), pressure transducer (1)；Simulation adds
Load part includes hydraulic cylinder (9) and pull pressure sensor (10)；
No. 1 hydraulic cylinder branch road on cylinder manifold (6) uses oil pipe to connect with the hydraulic fluid port of hydraulic cylinder (9) rodless cavity
Connecing, No. 2 hydraulic cylinder branch roads on cylinder manifold (6) use oil pipe to connect with the hydraulic fluid port of hydraulic cylinder (9) rod chamber
Connect；4 outfans of the next programmable controller PLC respectively with 1 in tested hydraulic system mounting portion
Number three-position four-way electromagnetic directional valve (5a), No. 2 three-position four-way electromagnetic directional valve (5b), No. 3 3-position 4-way electricity
Magnetic reversal valve (5c) connects with the terminals electric wire of the electric magnet on No. 4 three-position four-way electromagnetic directional valve (5d)
Connect；Two signal input parts of A/D capture card successively with the signal output of pressure transducer and pull pressure sensor
Line electric wire connects；
Described tested hydraulic system mounting portion is arranged on ground, and simulation loading is partially installed on by test solution
On ground on the right side of pressure system mounting portion, automatically control the ground being partially installed on simulation loading partial right side
On；
Described simulation loading part includes bearing part, static loading part, dynamic load part and Horizon
Ferrum (23)；
Bearing part, static loading part all use with dynamic load part and are bolted to ground black iron (23)
On；The right-hand member of hydraulic cylinder (9) piston rod in bearing part and the left end bolt of pull pressure sensor (10)
Connect, the left end spiral shell of the load bar (11) in the right-hand member of pull pressure sensor (10) and static loading part
Tether and connect, the right side of the extending (19) in static loading part and the cam (22) in dynamic load part
Contact connects, the axis of rotation of hydraulic cylinder (9) piston rod and the axis of rotation coaxial line of load bar (11),
The axis of rotation of load bar (11) and the rotation centerline of cam (22) intersect vertically.
2. according to the Digit Control Machine Tool Hydraulic System Reliability assay device described in claim 1, it is characterised in that
Described bearing part also includes hydraulic cylinder bearing (7) and hydraulic cylinder FE Tiler (8)；
Described hydraulic cylinder bearing (7) is fixed by bolts on ground black iron (23), hydraulic cylinder FE Tiler (8)
Being fixed by bolts on hydraulic cylinder bearing (7), hydraulic cylinder (9) is placed on hydraulic cylinder bearing (7) and hydraulic pressure
In the inner chamber that compound of sand, clay, etc. for making earthenware lid (8) is formed；
Hydraulic cylinder bearing (7) is made up of the splayed supporting walls of the semi-circular ring of upper end with lower end, and splayed is propped up
The upper end of support wall is circular arc opening, is respectively arranged with bolt and leads to before and after splayed supporting walls lower end on lower margin
Hole, the circular arc opening of splayed supporting walls upper end is connected with the external cylindrical surface of semi-circular ring, semicircular ring
The axis of rotation of body is vertical with splayed supporting walls, being the most flatly provided with of semi-circular ring
Strip flange, strip flange is provided with bolt hole, the strip flange in semi-circular ring and hydraulic cylinder
The upper strip flange arrangement arranged of FE Tiler (8) is identical, hydraulic cylinder FE Tiler (8) is provided with 2 for
The through hole of oil pipe is installed, the position of two through hole respectively with fuel feed hole and the rod chamber of the rodless cavity of hydraulic cylinder (9)
Fuel feed hole align, on the axis of the piston rod right-hand member of hydraulic cylinder (9) process tapped blind hole.
3. according to the Digit Control Machine Tool Hydraulic System Reliability assay device described in claim 1, it is characterised in that
Described static loading part includes load bar (11), big end cap (12), No. 1 disc spring group (13), small end
Lid (14), spring (15), small box (16), big casing (17), No. 2 disc spring groups (18) and extending
(19)；
Small end cover (14) uses and is bolted on the left side of small box (16)；Load bar (11)
Right-hand member is arranged in the inner chamber that small end cover (14) and small box (16) form, and extending (19) uses bolt
It is fixed on the right side of small box (16) right tank wall, and stretches out outside big casing (17) right tank wall, prolong
The axis of rotation of long cylinder (19) and the axis of rotation conllinear of the centre bore on small box (16) right tank wall, add
The left side carrying bar (11) shaft shoulder contacts connection, load bar (11) axle with the right side of small end cover (14)
Shoulder right-hand rod portion is sequentially inserted into the centre bore on spring (15), small box (16) right tank wall and extending (19)
Groove in, on the left of load bar (11) shaft shoulder bar portion be sequentially inserted into small end cover (14) small end cover centre bore,
No. 1 disc spring group (13), the big end cap central bore of big end cap (12) also stretch out big end cap (12) and big casing
(17) outside the inner chamber formed；It is threaded blind on the centrage of the left end of load bar (11) extension
Hole, the shaft shoulder outer round surface of load bar (11) is matched in clearance with the cylindrical cavity wall of small box (16),
The structure that load bar (11), spring (15), small end cover (14) and small box (16) form is arranged on greatly
In casing (17), and it is respectively mounted No. 1 on the right side in the left side of small end cover (14) Yu small box (16)
Disc spring group (13) and No. 2 disc spring groups (18)；Big end cap (12) is fixed by bolts to big casing (17)
On left side, No. 2 disc spring groups (18) are sleeved on extending (19), the inner cylinder face of big casing (17)
The outer cylinder surface of the casing assembly formed with small end cover (14) and small box (16) is matched in clearance, No. 1
Disc spring group (13), spring (15), No. 2 disc spring groups (18) are in compressive state.
4. according to the Digit Control Machine Tool Hydraulic System Reliability assay device described in claim 1, it is characterised in that
Described dynamic load part includes motor support base (20), motor (21) and cam (22)；
Motor support base (20) is made up of the splay supporting leg of the supporting walls of the rectangle of upper end with lower end, square
The supporting walls of shape is connected with the splayed supporting leg of lower end, and the center of supporting walls is provided with installation motor
The central through hole of output shaft, the bolt hole being provided with fixing motor evenly around of central through hole, support
Wall is vertical with splayed supporting leg place plane；
Motor (21) is horizontally fixed on the supporting walls of motor support base (20) upper end, motor (21) defeated
Shaft stretches out from the central through hole of supporting walls, and cam (22) is arranged on the output shaft of motor (21) also
Employing nut is fixed.
5. according to the Digit Control Machine Tool Hydraulic System Reliability assay device described in claim 1, it is characterised in that
Described tested hydraulic system mounting portion also includes experimental desk (2) and oil-Absorbing Sheets lay plate (3)；
Tested hydraulic system (4) is fixed on the intermediate layer portable plate of the intermediate layer pull plate of experimental desk (2)
On bottom surface；Pressure transducer (1) is horizontally mounted at the underlying activities plate of experimental desk (2) bottom pull plate
Upper surface on；Pressure transducer (1) is upper places oil-Absorbing Sheets lay plate (3), oil-Absorbing Sheets lay plate (3)
On flatly 1 layer of oil-Absorbing Sheets of lay, the area of oil-Absorbing Sheets can cover tested hydraulic system (4) in the horizontal plane
The area of projection, the vertical dimension between oil-Absorbing Sheets and tested hydraulic system (4) minimum point is 5～10cm；
On the upper surface of the top layer portable plate that cylinder manifold (6) is fixed on the top layer pull plate of experimental desk (2), No. 1 three
Position four-way electromagnetic reversing valve (5a), No. 2 three-position four-way electromagnetic directional valve (5b), No. 3 3-position 4-way electromagnetism change
Install on cylinder manifold (6) to valve (5c) and No. 4 three-position four-way electromagnetic directional valve (5d), cylinder manifold (6)
On No. 1 three-position four-way electromagnetic directional valve A branch road, No. 2 three-position four-way electromagnetic directional valve A branch roads, No. 3
Three-position four-way electromagnetic directional valve A branch road and No. 4 three-position four-way electromagnetic directional valve A branch roads and No. 1 3-position 4-way
The working hole A of solenoid directional control valve (5a), the working hole A of No. 2 three-position four-way electromagnetic directional valve (5b), 3
The working hole A of number three-position four-way electromagnetic directional valve (5c) and No. 4 three-position four-way electromagnetic directional valve (5d)
Working hole A for being in sealing contact connection, No. 1 three-position four-way electromagnetic directional valve B branch road on cylinder manifold (6),
No. 2 three-position four-way electromagnetic directional valve B branch roads, No. 3 three-position four-way electromagnetic directional valve B branch roads and No. 4 three four
Electric change valve B branch road and the working hole B of No. 1 three-position four-way electromagnetic directional valve (5a), No. 2 three four
The working hole B of electric change valve (5b), No. 3 three-position four-way electromagnetic directional valve (5c) working hole B with
The working hole B of No. 4 three-position four-way electromagnetic directional valve (5d) is for being in sealing contact connection.
6. according to the Digit Control Machine Tool Hydraulic System Reliability assay device described in claim 1, it is characterised in that
Described cylinder manifold (6) is cuboid structural member, and the internal water level land of cylinder manifold (6) is provided with A master
Oil circuit (25) and B working connection (26), the upper end of cylinder manifold (6) inside is provided with vertically leads to hydraulic pressure
No. 1 hydraulic cylinder branch road of cylinder (9) and No. 2 hydraulic cylinder branch roads, No. 1 hydraulic cylinder branch road and No. 2 hydraulic cylinders prop up
The lower end on road connects with B working connection (26) with A working connection (25) successively, under cylinder manifold (6) is internal
End is provided with 8 and No. 1 three-position four-way electromagnetic directional valve (5a), No. 2 3-position 4-way electromagnetic switch vertically
Valve (5b), No. 3 three-position four-way electromagnetic directional valve (5c), No. 4 three-position four-way electromagnetic directional valve (5d) connections
A branch road and B branch road, i.e. No. 1 three-position four-way electromagnetic directional valve A branch road, No. 2 3-position 4-way electromagnetism change
Prop up to valve A branch road, No. 3 three-position four-way electromagnetic directional valve A branch roads, No. 4 three-position four-way electromagnetic directional valve A
Road, No. 1 three-position four-way electromagnetic directional valve B branch road, No. 2 three-position four-way electromagnetic directional valve B branch roads, No. 3 three
Position four-way electromagnetic reversing valve B branch road and No. 4 three-position four-way electromagnetic directional valve B branch roads, No. 1 3-position 4-way electricity
Magnetic reversal valve A branch road, No. 2 three-position four-way electromagnetic directional valve A branch roads, No. 3 three-position four-way electromagnetic directional valve A
Branch road and the upper end of No. 4 three-position four-way electromagnetic directional valve A branch roads and A working connection (25) connect, No. 1 three
Position four-way electromagnetic reversing valve B branch road, No. 2 three-position four-way electromagnetic directional valve B branch roads, No. 3 3-position 4-way electromagnetism
Reversal valve B branch road and No. 4 three-position four-way electromagnetic directional valve B branch roads and B working connection (26) connect, and conflux
The left side wall of plate (6), for closing, the right side wall of cylinder manifold (6) is provided with A working connection (25) and B
The connector of working connection (26).
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Effective date of registration: 20220829 Address after: 618 Liangjiang Avenue, Longxing Town, Yubei District, Chongqing Patentee after: Chongqing Research Institute of Jilin University Address before: 130012 No. 2699 Qianjin Street, Jilin, Changchun Patentee before: Jilin University |
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