CN108398282A

CN108398282A - Servo oscillating feed system reliability test and test method

Info

Publication number: CN108398282A
Application number: CN201810544702.4A
Authority: CN
Inventors: 罗巍; 陈菲; 杨兆军; 许彬彬; 郑宏伟; 郭亚明
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2018-05-31
Filing date: 2018-05-31
Publication date: 2018-08-14
Anticipated expiration: 2038-05-31
Also published as: CN108398282B

Abstract

The invention discloses a kind of servo oscillating feed system reliability test and test method, the problem of overcoming currently without reliability test and test method, device includes servo oscillating feed system, loading system and control system；Servo oscillating feed system includes workbench, pendulous device, servo oil circuit block assembly；Loading system includes servo motor, retarder；Control system includes operation console and laser interferometer；Workbench is mounted on ground, and pendulous device, servo oil circuit block assembly are mounted on before workbench and the upper end of right side；Retarder is mounted in pendulous device on pedestal lower cover, and oscillating spindle is keyed in the output shaft and pendulous device of retarder, and servo motor is mounted on retarder left end, is between the two rigid connection；Laser interferometer is mounted on operation console on workbench left and right side ground, and operation console and laser interferometer, loading system and servo oscillating feed system electric wire connect.The invention also discloses a kind of test methods.

Description

Servo oscillating feed system reliability test and test method

Technical field

The present invention relates to a kind of experimental rigs of Precision Manufacturing Technology and field of industrial automation control, more precisely, The present invention relates to a kind of servo oscillating feed system reliability test and test methods.

Background technology

Servo oscillating feed system is mainly used in the numerically-controlled machine tool for needing high-precision rotary to move, such as in spinning machine Servo oscillating feed system.The servo oscillating feed system component part important as numerically-controlled machine tool, reliability, especially essence The height of degree reliability is directly related to the reliability of entire numerically-controlled machine tool, the processing quality of machining accuracy and product.In reality In the production of border, servo oscillating feed system will appear the precision failure of removal generated because precision is unstable, or oil pressure occurs The failures such as deficiency, Hydraulic Elements damage, oil leak, control system alarm.Reliability test, number are carried out to servo oscillating feed system According to analyzing and proposing that corrective measure is to improve an effective way of servo oscillating feed system reliability, for numerically-controlled machine tool Precision improvement be of great significance.

Currently, it is domestic less to the reliability test of servo oscillating feed system, more only carried out in zero load The detection of positioning accuracy and repetitive positioning accuracy does not have simulation loading function.Therefore a kind of servo oscillating feed system is researched and developed Reliability test and test method are those skilled in the art's letter problems to be solved.

Invention content

The technical problem to be solved by the present invention is to overcome the current country to be not equipped with analog servomechanism swing feed system The problem of loading the reliability test and reliability test method of function, it is reliable to provide a kind of servo oscillating feed system Property experimental rig and test method.

In order to solve the above technical problems, the present invention adopts the following technical scheme that realization：The servo oscillating feeding System Reliability Test device includes servo oscillating feed system, loading system and control system；

The servo oscillating feed system includes workbench, pendulous device, servo oil circuit block assembly；

The loading system includes servo motor, reducer stent, retarder, technical weights；

The control system includes operation console and laser interferometer；

The workbench is fixedly connected on using foundation bolt on ground, and pendulous device passes through the round tube hole on workbench On the inclined wall of workbench, and it is fixed by bolts on the inclined wall for being connected to workbench；Servo oil circuit block assembly is pacified Upper end mounted in workbench right side；Reducer stent is mounted on the front end face of pedestal lower cover in pendulous device using bolt On, retarder is mounted on by its bottom end on the vertical plate of reducer stent, and the output shaft of retarder is inserted into pendulous device In oscillating spindle in the round inner stopper of swinging head front end face lower part, servo motor is mounted on the peace of retarder left end using screw In loading board, output shaft and the retarder of servo motor are rigidly connected, and technical weights are fixed in the T-slot on oscillating spindle；Behaviour Make platform on the ground on the right side of workbench, laser interferometer is mounted on the ground on the left of workbench, operation console and laser Interferometer, loading system and servo oscillating feed system electric wire connect.

Workbench described in technical solution is to use iso-cross-section made of monoblock cast mode for the sky of multi-edge column-shaped Hearty cord component, workbench are internally provided with vertically and horizontally gusset, and loss of weight is vertically and horizontally provided on gusset and is led to convenient for clear husky triangle Hole, there are one the round tube hole for installing the swinging base in pendulous device, workbench for setting at the center of table inclination wall Rear wall is provided with the rectangular through-hole for facilitating repair and wiring, and the bottom end of workbench front and rear end is symmetrically arranged that there are five knots The identical Niche type fixed seat of structure, bores that there are one the through-holes for being used for mounting foot bolt on its bottom surface, on the bottom wall of workbench Equably setting is horizontally arranged with there are four being used for mitigating weight and convenient clear husky rectangular through-hole, table inclination wall surface What is be mutually parallel is used for fixing the T-slot of pendulous device, and there are four install servo oil circuit block for the upper end setting of workbench right side The threaded hole of holder.

Pendulous device described in technical solution include swinging base, the identical sliding block of 2 structures, rolling guide, rack, Gear, oscillating spindle, the identical positioning pin of 8 structures, oil cylinder fixed plate, servo-cylinder, pedestal upper cover plate, pedestal lower cover, 1 Number Biserial cylindrical roller bearing, No. 1 thrust ball bearing, No. 2 double-row cylindrical roller axis, No. 1 bearing spacer, No. 2 thrust ball bearings, No. 2 bearing spacers, boss, encoder holder, encoder, encoder coupling, main shaft projecting shaft, end flanges disk with it is close Seal；

The rolling guide is mounted on using screw on the guide-track groove of the roof of swinging base inner cavity, and 2 structures are identical One end of sliding block be sleeved on rolling guide, the other end of the identical sliding block of 2 structures and rack use bolt without increment It is fixedly connected, rack has increment to engage connection with following gear, and gear is mounted in swinging base and is sleeved on swing master On axis, it is connected using the identical positioning pin of 8 structures between gear and oscillating spindle, oscillating spindle is mounted on swinging base With multi-diameter shaft cylinder, No. 1 thrust ball bearing is mounted in the rear annular groove of gear rear end and is sleeved on pendulum rear shell body wall through-hole On the multi-diameter shaft of dynamic main shaft, between the right end of the multi-diameter shaft of oscillating spindle and the multi-diameter shaft cylinder of swinging base from front to back successively No. 2 double-row cylindrical roller axis, No. 1 bearing spacer, No. 2 thrust ball bearings and No. 2 bearing spacers are installed, No. 2 bearing spacers Rear side is equipped with boss and is fixedly connected with the multi-diameter shaft of oscillating spindle using screw, and main shaft projecting shaft is mounted on to swing and lead It in the rear end of the multi-diameter shaft centre bore of axis and adopts and is screwed, end flanges disk is installed on rear side of boss and uses spiral shell Nail is fixedly connected with the multi-diameter shaft cylinder of swinging base, and sealing ring is mounted in the seal groove of end flanges disk, encoder holder It is mounted on end flanges disk using screw, encoder is mounted on using screw on encoder holder, before encoder coupling End is connected with main shaft projecting shaft, and the rear end of encoder coupling is connected with encoder；Pedestal upper cover plate, which is mounted on, swings base It on seat and adopts and is screwed, on the swinging base that pedestal lower cover is mounted below pedestal upper cover plate and be sleeved on oscillating spindle Multi-diameter shaft on, adopt and be screwed between pedestal lower cover and swinging base, the multi-diameter shaft of pedestal lower cover and oscillating spindle Between No. 1 Biserial cylindrical roller bearing is installed, the front end face of the rear end face and pedestal lower cover of the swinging head of oscillating spindle connects Connection is touched, the boss of pedestal lower cover rear end is connected with the preceding annular stopper of gear front end.

Oscillating spindle described in technical solution is made of swinging head and multi-diameter shaft；The swinging head be one it is cylindrical with The plate structure part that rectangle is formed, swinging head front end face be vertically provided with two be mutually parallel be used for fixed industry The T-slot of counterweight, at the lower central of the front end face of swinging head in the circle of one output shaft for being used for installing retarder of setting Seam allowance is provided with the keyway of installation key on round inner stopper；It is step-like axis class that the multi-diameter shaft, which is outside inner hollow, Part is connected to form oscillating spindle with the rear end face of swinging head, and a male half coupling is arranged in the rear end of multi-diameter shaft, in male half coupling Circumference on be uniformly arranged eight for installing the screw holes of boss, be uniformly arranged on the circumference of multi-diameter shaft rear end face The screw hole of eight installation main shaft projecting shafts.

Swinging base described in technical solution is the shell structure part of T-shaped uniform thickness, and the inner cavity of swinging base is T words The space of the uniform thickness of shape with right end is open type before swinging base, and the T-shaped periphery of swinging base front end face is provided with width Equal outside flattened flange is spent, is equably provided on flange for installation pedestal upper cover plate and pedestal lower cover Identical No. 1 bolt hole of structure；The left and right ends of the rear shell body wall of swinging base are each provided with the mounting base of rectangle, left and right ends Rectangle mounting base on to be respectively set that there are five structures identical for using bolts and nuts swinging base being fixed on work Make the dormant bolt through-hole on the inclined wall of platform, is equably provided with for installation oil cylinder on the end face of swinging base right-end openings No. 2 screw holes of fixed plate are provided with multi-diameter shaft in installation oscillating spindle at the center of the rear shell body wall lower end of swinging base Multi-diameter shaft cylinder, rear shell body wall are connected with multi-diameter shaft cylinder, are provided on the rear shell body wall being connected with multi-diameter shaft cylinder One rear shell body wall through-hole, the aperture of rear shell body wall through-hole are more than the aperture of multi-diameter shaft barrel front end endoporus, after multi-diameter shaft cylinder The aperture of the 3 sections of endoporus in end increases successively, and rear shell body wall through-hole and the axis of rotation of 4 sections of ladder shaft type endoporus of multi-diameter shaft cylinder are total Line is equably provided with No. 3 screw holes of installation end face ring flange, the top of swinging base inner cavity on the rear end face of multi-diameter shaft cylinder Wall is provided with a guide-track groove, and No. 4 threaded holes for installing rolling guide are equably provided on guide-track groove.

Servo oil circuit block assembly described in technical solution includes servo oil circuit block holder, the identical servo oil of 4 structures Road pipe fitting, the identical pressure sensor of 2 structures, servo oil circuit block, the identical plug-in solenoid directional control valve of 2 structures and height Frequency response direction valve；The identical pressure sensor of 2 structures is mounted on 2 structure phases of servo oil circuit block left side upper end On No. 1 same threaded hole, the identical servo oil circuit pipe fitting of 2 structures is mounted on 2 knots of servo oil circuit block left side lower end On identical No. 2 threaded holes of structure, the identical servo oil circuit pipe fitting of another 2 structures is mounted on 2 of servo oil circuit block right side On identical No. 5 threaded holes of structure, the identical plug-in solenoid directional control valve of 2 structures is mounted on the left of servo oil circuit block top end face Identical No. 3 threaded holes of 2 structures on, high frequency sound direction valve be mounted on servo oil circuit block top end face on the right side of 4 structure phases On No. 4 same threaded holes.

Control system described in technical solution includes that operation console refers to laser interferometer：The operation console includes defeated Enter output module, 24V power supplys, operation panel, mouse, Siemens's 840Ds l systems, analog-driven interface module, keyboard, numerical control Unit, adjustment type power module, single motor drive module and direct measuring system；The electrical line end of the 24V power supplys and west The X1 interfaces connection of the sub- 840Ds l systems of door, the electrical line end of operation panel are inserted with the flat multicore of Siemens's 840Ds l systems Mouthful connection, the electrical line end of mouse are connect with the USB1 interfaces of Siemens's 840Ds l systems, the electrical line end of keyboard and Siemens The USB2 interfaces of 840Ds l systems connect, and the X2 interface end of analog-driven interface module uses electrical cable and numerical control unit X126 interface ends be connected；The X100 interfaces of numerical control unit are connected by cable with the X200 interfaces of adjustment type power module It connects, the X101 interfaces of numerical control unit are connected using cable with the X200 interfaces of single motor drive module；Single motor drive module X203 interfaces be connected with the X500 interfaces of direct measuring system by cable, the X2 interface end of input/output module is using electricity Gas connecting line is connected with the X126 interface ends of numerical control unit, is used between input/output module and the output end of laser interferometer Electrical cable.

Operation console and laser interferometer, loading system and servo oscillating feed system electric wire described in technical solution connect It connects and refers to：The X3-1 interfaces of input/output module in the operation console use the output of electrical cable and laser interferometer End connection, the X111 interfaces of input/output module are connected using electrical cable with the terminals of plug-in solenoid directional control valve, The X3-2 interfaces of input/output module are connected using electrical cable with pressure sensor, the X3-3 interfaces of input/output module It is connected with high frequency sound direction valve by electrical cable；The X4-1 interfaces of analog-driven interface module in operation console are using electricity Gas connecting line is connected with grating scale built in servo-cylinder, and the X1 interfaces of the single motor drive module in operation console pass through motor electricity Cable is connected with servo motor, and the X202 interfaces of single motor drive module pass through the servo electricity built in signal cable and servo motor Machine built-in encoder is connected, and the X520 interfaces of the direct measuring system in operation console are connected using signal cable with encoder It connects.

The step of described test method using servo oscillating feed system reliability test, is as follows：

1) reliability test prepares

(1) it is 20 ± 5 degrees Celsius to keep test ambient temperature constant, by servo oscillating feed system reliability test It places and is more than 12 hours in experimental enviroment；

(2) technical weights that different weight is loaded in the T-slot on oscillating spindle, can be with simulation loading different weight Cutter, for simulating real working condition；

(3) the load torque of servo motor is set in the controls；

(4) servo oscillating feed system precision index allowable tolerance is set, precision index includes positioning accuracy, resetting The swing angle precision of precision and oscillating spindle；

2) detection of reliability test data and record

(1) start automatic control program, reliability test starts timing；

(2) in servo oscillating feed system oscillating spindle according to the test procedure of setting the reciprocation cycle between effective travel It swings, passes through the positioning accuracy of laser interferometer measurement oscillating spindle and repetitive positioning accuracy and real-time Transmission to Siemens 840Ds l systems；By encoder measure oscillating spindle practical swing angle and real-time Transmission to Siemens's 840Dsl systems；

(3) data that Siemens 840Dsl systems are detected using laser interferometer, the actual location essence of oscillating spindle Degree, the positioning accuracy that is set with control system of repetitive positioning accuracy, repetitive positioning accuracy allowable tolerance compare, if actual value is big In setting value, then judges that the servo oscillating feed system precision fails, be denoted as a precision failure of removal；Encoder is measured and is put The practical swing angle of dynamic main shaft allows with the swing angle that control system is set compared with difference, if actual value is more than setting Value then judges that the servo oscillating feed system precision fails, is denoted as a precision failure of removal；Control system also records other events Barrier, such as：Oil pressure is insufficient, Hydraulic Elements damage, oil leak, the failures such as control system alarm；If after breaking down, stopping this time Reliability test, and record this time continuous time between failures of experiment；

3) analysis of reliability test data

(1) after the completion of reliability test, the fault data processing for statistical analysis to experiment acquisition utilizes FMECA Analysis method evaluates the reliability level of tested servo oscillating feed system；

(2) during reliability test, if there is oil pressure, insufficient, Hydraulic Elements damage, oil leak, control system alarm Etc. failures when, then should stop testing immediately, analyze failure Producing reason, and to servo oscillating feed system reliability test fill It sets and is improved.

The reliability water that tested servo oscillating feed system is evaluated using FMECA analysis methods described in technical solution It is flat to refer to：

(1) failure modes：Classified according to reliability test data result, counts the failure portion that each failure occurs Position, failure cause and fault mode；

(2) the qualitative effect analysis of fault mode：The possibility occurrence of each fault mode is divided into discrete rank, Then analysis personnel evaluate each fault mode by defined rank, including probability of malfunction grade, severity etc. The evaluation of grade；

Severity grade is divided into I class disaster failover, II class critical failure, III class critical fault, IV minor failure；

Failure rate grade is divided into A grades of failures frequent occurrence, and B grades of failures occur sometimes, and C grades of failures accidentally occur, D grades of failures Seldom occur, E grades of failures seldom occur；

(3) each mode condition is determined：Determine fault mode frequency ratio α_i, failure influence probability β_iWith basic failure rate λ；

(4) fault mode frequency ratio is calculated：Fault mode frequency ratio α_iIt is the fault mode that plant failure performance is determination Ratio, expression formula is：

α_i=n_i/n

In formula：n_iThe number that-a certain i-th kind of the fault mode in position occurs；

The number that a certain position whole fault modes of n-occur；

(5) determine that failure influences probability：Failure influences probability β_iRefer to when assuming that certain fault mode has occurred and that, causing really The final condition of fixed severity grade influences probability；

β=1 indicates to damage certainly, and the expressions of β=0.5 may damage, and the expressions of β=0.1 seldom damage；β =0 indicates no influence；

(6) basic failure rate is determined：λ indicates that the basic failure rate at a certain position, failure rate expression formula are：

In formula, ∑ t-system accumulated operating time at the appointed time；

The number to break down in a certain positions N-；

(7) each pattern and harm to the system degree are calculated：Fault mode density of infection C_miIt is a part for harm to the system degree, product I-th of fault mode density of infection C_miIt can be calculated by following formula：

C_mi=α_iβ_iλ

For the harmfulness of evaluation system, density of infection C_rIt can be calculated by following formula：

(8) system core position is determined：The crucial portion of whole system is determined according to the fault mode density of infection at each position Position；

(9) corrective measure or suggestion are proposed：According to the size of density of infection, key position is proposed to improve by significance level and is arranged It applies or suggests；

(10) complete FMECA reports are exported.

Compared with prior art the beneficial effects of the invention are as follows：

1. what servo oscillating feed system reliability test of the present invention can be to servo oscillating feed system can Tested and detected by property and wobble accuracy, operation with it is easy to detect, testing result is reliable.By to tested servo oscillating Feed system carry out simulation real working condition reliability test, exposure and excitation product failure, be product reliability growth and Assessment provides practical basic data.

2. servo oscillating feed system reliability test of the present invention uses the side of servo motor torque load Formula loads servo oscillating feed system, is born during actual processing to analog servomechanism swing feed system Load.Servo motor torque of the present invention is loaded as closed-loop control, and load mode can be made to have higher load essence Degree.

3. servo oscillating feed system reliability test of the present invention has automatic control system, can be in journey Accuracy data is automatically recorded under sequence control, while automatically recording fail data when there is precision failure or failure.

Description of the drawings

The present invention will be further described below with reference to the drawings：

Fig. 1 is that the axonometric projection of servo oscillating feed system reliability test structure composition of the present invention regards Figure；

Fig. 2 is the pendulous device structure employed in servo oscillating feed system reliability test of the present invention The axonometric projection view of composition；

Fig. 3 is the pendulous device structure employed in servo oscillating feed system reliability test of the present invention The front view of composition；

Fig. 4 is that the pendulous device employed in servo oscillating feed system reliability test of the present invention is being schemed Sectional view in 3 at A-A；

Fig. 5 is the servo oil circuit block group employed in servo oscillating feed system reliability test of the present invention Part breakdown axonometric projection view；

Fig. 6 is the knot of the control system employed in servo oscillating feed system reliability test of the present invention Structure forms schematic block diagram；

Fig. 7 is the flow diagram of servo oscillating feed system reliability test method of the present invention；

Fig. 8 is that the axis side of the workbench used in servo oscillating feed system reliability test of the present invention is thrown Video display figure；

Fig. 9 is the flow of FMECA analysis methods in servo oscillating feed system reliability test method of the present invention Block diagram；

In figure：1. workbench, 2. servo motors, 3. reducer stents, 4. retarders, 5. technical weights, 6. pendulous devices, 601. swinging bases, 602. sliding blocks, 603. rolling guides, 604. racks, 605. gears, 606. oscillating spindles, 607. positioning pins, 608. oil cylinder fixed plates, 609. servo-cylinders, 610. pedestal upper cover plates, 611. pedestal lower covers, No. 612.1 double-row cylindrical rollers Bearing, No. 613.1 thrust ball bearings, No. 614.2 Biserial cylindrical roller bearings, No. 615.1 bearing spacers, No. 616.2 thrust balls Bearing, No. 617.2 bearing spacers, 618. bosses, 619. encoder holders, 620. encoders, 621. encoder couplings, 622. main shaft projecting shafts, 623. end flanges disks, 624. sealing rings, grating scale built in 625. servo-cylinders, 7. servo oil circuit blocks Holder, 8. servo oil circuit pipe fittings, 9. pressure sensors, 10. servo oil circuit blocks, 11. plug-in solenoid directional control valves, 12. high frequencies Ring direction valve, 13. operation consoles, 14. laser interferometer, 15. input/output modules, 16.24V power supplys, 17. operation panels, 18. mouse Mark, 19. Siemens's 840Ds l systems, 20. analog-driven interface modules, 21. keyboards, 22. numerical control units, 23. adjustment type power supplys Module, 24. single motor drive modules, 25. servo motor built-in encoders, 26. direct measuring systems.

Specific implementation mode

The present invention is explained in detail below in conjunction with the accompanying drawings：

Servo oscillating feed system reliability test of the present invention is analog servomechanism swing feed system in reality The running different operating modes in border obtain the reliability and precision of servo oscillating feed system by different loads Reliability data, while the present invention also provides the servo oscillating feed system reliability test methods of complete set.

One, servo oscillating feed system reliability test

Refering to fig. 1, servo oscillating feed system reliability test of the present invention includes servo oscillating feeding system System, loading system and control system.

1. servo oscillating feed system

Refering to fig. 1, the servo oscillating feed system includes workbench 1, pendulous device 6 and servo oil circuit block assembly.

Refering to fig. 1 and Fig. 8, the workbench 1 are to use iso-cross-section made of monoblock cast mode for multi-edge column-shaped Hollow structural component, workbench 1 is internally provided with lateral gusset, can greatly improve the rigidity and intensity of workbench 1, longitudinal gusset On be provided with triangle through hole, these through-holes have the function of loss of weight and convenient clear husky；It is arranged at the center of 1 inclined wall of workbench There are one round tube hole, round tube hole is provided with rectangular through-hole on 1 rear wall of workbench, ties up for convenience for installing swinging base 601 It repaiies and wiring；The bottom end of 1 front and rear end of workbench is symmetrically arranged there are five the identical Niche type fixed seat of structure, alcove Formula fixed seat structure is interior Horizontal rectangular space, is bored on its bottom surface there are one through-hole, is used for mounting foot bolt；Workbench 1 Bottom wall on equably setting is there are four rectangular through-hole, for mitigating weight and convenient clear husky；Workbench 1 is passed through into foundation bolt It is fixedly connected with ground, 1 sloped wall surface of workbench is horizontally arranged with the T shapes for being used for fixing pendulous device 6 being mutually parallel Slot, there are four the threaded holes of installation servo oil circuit block holder 7 for the upper end setting of 1 right side of workbench.

Referring to Fig.1, Fig. 2, Fig. 3 and Fig. 4, the pendulous device 6 include 601,2 identical sliding blocks of structure of swinging base 602, rolling guide 603, rack 604, gear 605, the identical positioning pin 607 of 606,8 structures of oscillating spindle, oil cylinder fixed plate 608, servo-cylinder 609, pedestal upper cover plate 610, the thrust ball of Biserial cylindrical roller bearing 612,1 of pedestal lower cover 611,1 The thrust ball bearing 616,2 of bearing spacer 615,2 of double-row cylindrical roller axis 614,1 of bearing 613,2 bearing spacer 617, Boss 618, encoder holder 619, encoder 620, encoder coupling 621, main shaft projecting shaft 622, end flanges disk 623, sealing ring 624 and grating scale 625 built in servo-cylinder.

The swinging base 601 is the shell structure part of T-shaped uniform thickness, and the inner cavity of swinging base 601 is T-shaped The space of uniform thickness with right end is open type before swinging base 601, and the T shapes periphery of the front end face of swinging base 601 is provided with Width equal outside flattened flange is equably provided with for installation pedestal upper cover plate 610 and pedestal on flange The identical bolt hole of structure of lower cover 611；The left and right ends of the rear shell body wall of swinging base 601 are each provided with the installation of rectangle Seat, is respectively set that there are five the identical dormant bolt through-holes of structure in the mounting base of the rectangle of left and right ends, by T-slot and adopts Swinging base 601 is fixed on the inclined wall of workbench 1 with bolt and hex nut, the end of 601 right-end openings of swinging base No. 2 screw holes for installation oil cylinder fixed plate 608 are equably provided on face, the rear shell body wall lower end of swinging base 601 The multi-diameter shaft cylinder of multi-diameter shaft in installation oscillating spindle 606 is provided at center, rear shell body wall is connected with multi-diameter shaft cylinder, There are one rear shell body wall through-holes, the aperture of rear shell body wall through-hole to be more than rank for setting on the rear shell body wall being connected with multi-diameter shaft cylinder The aperture of terraced axis barrel front end endoporus, multi-diameter shaft barrel front end endoporus is for installing No. 1 thrust ball bearing 613；Multi-diameter shaft cylinder The aperture of the 3 sections of endoporus in rear end increases successively backward, and 3 sections of endoporus are orderly used to installation 614, No. 1 axis of No. 2 Biserial cylindrical roller bearings Hold the thrust ball bearing 616,2 of spacer 615,2 bearing spacer 617, boss 618 and end flanges disk 623, rear shell body wall The rotation conllinear of 4 sections of ladder shaft type endoporus of through-hole and multi-diameter shaft cylinder is equably set on the rear end face of multi-diameter shaft cylinder No. 3 screw holes of installation end face ring flange 623 are equipped with, the roof of 601 inner cavity of swinging base is provided with one and is used for installing rolling The guide-track groove of guide rail 603 is equably provided with No. 4 threaded holes of installation rolling guide 603 on guide-track groove.

The sliding block 602 is using in the four direction constant load type linear rolling guide of GGB-AA types of Nanjing technique brand Sliding block, be provided with four round tube holes of standard above, by screw be mounted on rack 604 on.

The rolling guide 603 uses the four direction constant load type rolling linear guide of GGB-AA types of Nanjing technique brand Guide rail in pair, is provided with the equidistant sunk screw through-hole of standard, the number of sunk screw through-hole on swinging base 601 No. 4 threaded hole numbers it is equal and align, rolling guide 603 is mounted on the roof of 601 inner cavity of swinging base by screw On the guide-track groove of inside.

The lower face setting of the rack 604 is with teeth, and the tooth is identical as 605 modulus of gear, is intermeshed.Rack 604 Other end on be equably provided with threaded hole, number is equal with two 602 numbers of sliding block and aligns.Rack 604 Right end it is longitudinally disposed there are one threaded hole along rack 604, for being connected with the cylinder rod of servo-cylinder 609.

The gear 605 is Outer cylindrical gear, and gear 605 is identical as 604 modulus of rack, gear 605 and rack 604 It is intermeshed, a center round tube hole is set at the center of gear 605,8 half round pins are provided on the hole wall of center round tube hole Hole is linked together gear 605 and oscillating spindle 606 by positioning pin 607, annular before the front end setting one of gear 605 Seam allowance, the front boss being used on location and installation pedestal lower cover 611；Annular stopper after the rear end of gear 605 is arranged one, is used for No. 1 thrust ball bearing 613 is installed, eight round tube holes are equably provided with around 605 center round tube hole of gear, for loading and unloading 1 Number thrust ball bearing 613 and mitigate weight.

The oscillating spindle 606 is off-gauge irregular integral structural member, is divided into swinging head and multi-diameter shaft two Point.

The swinging head is with certain thickness channel plates, and swinging head front end face is vertically provided with two What is be mutually parallel is used for fixing the T-slot of technical weights 5, and a round inner stopper is arranged in the lower part of the front end face of swinging head, and It is provided with the keyway for transmitting torque, for installing the output shaft of retarder 4；The rear end face of swinging head and the front end of multi-diameter shaft are linked to be It is integrally formed oscillating spindle 606, a male half coupling is set on the rear end face of multi-diameter shaft, has been uniformly arranged on the circumference of male half coupling 8, for installing the screw holes of boss 618, have been uniformly arranged eight installation main shafts and have stretched out on the circumference of multi-diameter shaft rear end face The screw hole of axis 622；It is sequentially installed with No. 1 Biserial cylindrical roller bearing 612, positioning pin No. 607,2 numbers from front to back in multi-diameter shaft Biserial cylindrical roller bearing 614,1 bearing spacer 615,2 thrust ball bearing 616, No. 2 bearing spacers 617, bosses 618, encoder holder 619, main shaft projecting shaft 622.

The positioning pin 607 is the cylindrical pin with internal thread for meeting standard GB/T/T 120.1-2000, fixed using eight Gear 605 and oscillating spindle 606 are installed together by position pin 607, and transmit torque using positioning pin 607.

The oil cylinder fixed plate 608 is rectangular mounting plate, and it is logical that a center is provided at the center of oil cylinder fixed plate 608 Hole is the positioning spigot of servo-cylinder 609, the threaded holes of 12 installation servo-cylinders 609 is arranged around central through hole.In oil 14 sunk screw round tube holes are arranged in the surrounding of cylinder fixed plate 608, are mounted on oil cylinder fixed plate 608 by screw and swing base On No. 2 screw holes of 601 right sides of seat.

The servo-cylinder 609 is mounted on by screw hole thereon and using screw in oil cylinder fixed plate 608, servo The external part of oil cylinder 609 is screw thread rod end, and screw thread rod end stretches out from the central through hole of oil cylinder fixed plate 608 and is mounted on rack In the screw hole of 604 right ends, the cylinder body in servo-cylinder 609 is equipped with oil inlet A and oil outlet B；609 tail portion of servo-cylinder is Hollow structure is provided centrally with internal thread hole, for installing grating scale 625 built in servo-cylinder.

The pedestal upper cover plate 610 is rectangular plate structure part, is equably provided with the identical circle of structure thereon Pedestal upper cover plate 610 is mounted on No. 1 screw hole on 601 front end face top of swinging base by through-hole using screw.

The pedestal lower cover 611 is the plate structure part of T-type, and it is logical to be equably provided with the identical circle of structure thereon Hole, the identical round tube hole of structure are distributed at the periphery of pedestal lower cover 611, are mounted on pedestal lower cover 611 using screw On No. 1 screw hole of 601 front end face lower part of swinging base, 611 front end face of pedestal lower cover is provided with installation reducer stent 3 Four threaded holes, the multi-diameter shaft being provided at the center of 611 lower end of pedestal lower cover in installation oscillating spindle 606 and No. 1 biserial The stepped hole of cylinder roller bearing 612, the rear end at 611 lower end center of pedestal lower cover are provided with boss, the shape of boss with The preceding annular stopper of 605 front end of gear is identical.

No. 1 Biserial cylindrical roller bearing 612 is the double-row cylindrical roller for meeting standard GB/T/T 285-2013 Bearing.

No. 1 thrust ball bearing 613 is the thrust ball bearing for meeting standard GB/T/T 301-2015.

No. 2 Biserial cylindrical roller bearings 614 are the double-row cylindrical roller for meeting standard GB/T/T 285-2013 Bearing.

No. 1 bearing spacer 615 is hollow disc-like annular structural part, for being spaced No. 2 double-row cylindrical rollers Bearing 614 and No. 2 thrust ball bearings 616.

No. 2 thrust ball bearings 616 are the thrust ball bearing for meeting standard GB/T/T 301-2015.

No. 2 bearing spacers 617 are hollow disc-like annular structural part, for being spaced No. 2 thrust ball bearings 616 With boss 618.

The boss 618 is hollow revolving body ladder circle ring, thereafter uniformly distributed eight round ladder holes on end face, Boss 618 is mounted in oscillating spindle 606 on eight screw holes of ladder shaft rear end face male half coupling using screw.

The encoder holder 619 is hollow revolving parts, on the circular coupling plate of left side equably there are four arrangements Left round tube hole, equally equably there are four right round tube holes for arrangement on the madial wall of right side terminal pad.Encoder holder 619 uses spiral shell Nail is mounted on the threaded hole on the inside of 623 rear end face of end flanges disk.

It is logical that the encoder 620 is mounted on the circle on the madial wall of 619 right side terminal pad of encoder holder using screw Kong Shang, encoder 620 use Siemens TTL series encoders, signal cable to be connected to direct measuring system 26 On X520 interfaces.

The encoder coupling 621 is spring disk coupling, and left end is connected with main shaft projecting shaft 622, right End is connected with encoder 620.

The main shaft projecting shaft 622 is flange cross axle, and left side is put in 606 endoporus of oscillating spindle, and volume is stretched on right side In the left end endoporus of code device shaft coupling 621, eight round tube holes are uniformly arranged on circumference of flange.Main shaft projecting shaft 622 uses screw On the screw hole of 606 rear end face of oscillating spindle.

The end flanges disk 623 is disc-like structural member, and a seal groove is arranged in left end, to install sealing ring 624, the center is provided with round tube hole, and there are four screw holes for the setting of right side inside to install encoder holder 619, Eight ladder round tube holes are set on the outside of right side, end flanges disk 623 is mounted on by 601 ladder beam barrel of swinging base using screw On No. 3 screw holes of the rear end face of body.

The sealing ring 624 is the rotary shaft lip seal for meeting standard GB/T/T 13871.1-2007.

Grating scale 625 built in the servo-cylinder is mounted on the inside center internal thread hole of 609 tail portion of servo-cylinder, Grating scale 625 built in servo-cylinder is connected to using German Baruch's husband's brand BTLT rod-type structural series grating scales, electric wire The X4-1 interface ends of analog-driven interface module 20.

The rolling guide 603 is mounted on using screw on the guide-track groove of the roof of 601 inner cavity of swinging base, 2 knots One end of the identical sliding block of structure 602 is sleeved on rolling guide 603, the other end and rack of the identical sliding block of 2 structures 602 604 are fixed by bolts connection without increment, and rack 604 has increment to engage connection with following gear 605, gear 605 is pacified It in swinging base 601 and is sleeved on oscillating spindle 606,8 structure phases is used between gear 605 and oscillating spindle 606 Same positioning pin 607 is connected, and oscillating spindle 606 is mounted in rear shell body wall through-hole and the multi-diameter shaft cylinder of swinging base 601, No. 1 thrust ball bearing 613 is mounted in the rear annular groove of 605 rear end of gear and is sleeved on the week of the multi-diameter shaft of oscillating spindle 606 It encloses, 2 is sequentially installed with from front to back between the right end of the multi-diameter shaft of oscillating spindle 606 and the multi-diameter shaft cylinder of swinging base 601 Number thrust ball bearing 616 of bearing spacer 615,2 of double-row cylindrical roller axis 614,1 and 617, No. 2 bearings of No. 2 bearing spacers every The rear side of set 617 is equipped with boss 618 and is fixedly connected with the multi-diameter shaft of oscillating spindle 606 using screw, and main shaft stretches out Axis 622 is mounted in the rear end of the multi-diameter shaft centre bore of oscillating spindle 606 and adopts and is screwed, the rear side of boss 618 End flanges disk 623 is installed and is fixedly connected with the multi-diameter shaft cylinder of swinging base 601 using screw, sealing ring 624 is installed In the seal groove of end flanges disk 623, encoder holder 619 is mounted on using screw on end flanges disk 623, encoder 620 are mounted on using screw on encoder holder 619, and the front end of encoder coupling 621 is connected with main shaft projecting shaft 622, The rear end of encoder coupling 621 is connected with encoder 620；Pedestal upper cover plate 610 is mounted on swinging base 601 and uses Screw is fixed, and on the swinging base 601 that pedestal lower cover 611 is mounted below pedestal upper cover plate 610 and is sleeved on oscillating spindle On 606 multi-diameter shaft, adopts and be screwed between pedestal lower cover 611 and swinging base 601, pedestal lower cover 611 and swing No. 1 Biserial cylindrical roller bearing 612 is installed between the multi-diameter shaft of main shaft 606, the rear end face of the swinging head of oscillating spindle 606 with The front end face of pedestal lower cover 611 connects, and the boss and the preceding annular of 605 front end of gear of 611 rear end of pedestal lower cover stop Mouth connects.

Refering to fig. 1 and Fig. 5, the servo oil circuit block assembly includes that structure is identical watches for 7,4, servo oil circuit block holder Take the identical pressure sensor 9 of 8,2 structures of oil circuit pipe fitting, the identical plug-in electromagnetism of 10,2 structures of servo oil circuit block changes To valve 11 and high frequency sound direction valve 12.

The servo oil circuit block holder 7 is L shaped plate class welding support, and servo oil circuit block holder 7 includes orthogonal Vertical plate, level board and stiffener plate.There are four round tube hole, there are four threaded holes for setting on level board, lead to for setting on vertical plate Screw is crossed to be mounted on servo oil circuit block holder 7 on the threaded hole of 1 right side upper end of workbench.

The servo oil circuit block 10 is the structural member of cuboid, and the front and back side of bottom end is provided with the installation of strip Lower margin is each provided with 2 round tube holes on the mounting foot of 2 strips, and servo oil circuit block 10 is mounted on servo using screw On 7 level board of oil path block holder.The left side upper end of servo oil circuit block 10 is provided with identical No. 1 threaded hole of 2 structures, is 2 The work oil inlet A1 and work oil return opening B1 of the identical pressure sensor of structure 9；10 left side lower end of servo oil circuit block is arranged There are 2 No. 2 threaded holes, is the oil inlet P 1 and oil return inlet T 1 of 2 structure identical servo oil circuit pipe fittings 8.Servo oil circuit block 10 Top end face on the left of be provided with identical No. 3 threaded holes of 2 structures, be the identical plug-in solenoid directional control valve of 2 structures 11 Work oil inlet A2 and work oil return opening B2；It is No. 4 identical that 4 structures are provided on the right side of the top end face of servo oil circuit block 10 Threaded hole is provided with the identical round tube hole of 4 structures in the identical No. 4 threaded hole middles of 4 structures, and 4 structures are identical Round tube hole is respectively oil inlet P 2, oil return inlet T 2, work oil inlet A3 and the work oil return opening B3 of high frequency sound direction valve 12.Servo The right side of oil path block 10 is provided with identical No. 5 threaded holes of 2 structures, and identical No. 5 threaded holes of 2 structures are hydraulic power source Oil inlet P 3 and oil return inlet T 3；The oil inlet P 3 and oil return inlet T 3 of servo oil circuit block 10 respectively with oil inlet P 2,2 phase of oil return inlet T Connection, the oil inlet A3 and work oil return opening B3 that works is connected with work oil inlet A2 and work oil return opening B2 respectively, while work Make oil inlet A2 and work oil return opening B2 be connected with work oil inlet A1 and work oil return opening B1 respectively, work oil inlet A1 with Work oil return opening B1 is connected with oil inlet P 1 and oil return inlet T 1 respectively.

The identical servo oil circuit pipe fitting 8 of 4 structures is the welded type for meeting national standard JB/T966-2005 Pipe fitting.No. 2 screw threads of 10 left side lower part of servo oil circuit block are mounted on using the identical servo oil circuit pipe fitting 8 of 2 structures Kong Shang, then be mounted on No. 5 threaded holes of 10 right side of servo oil circuit block using the identical servo oil circuit pipe fitting 8 of 2 structures.

The identical pressure sensor 9 of 2 structures is mounted on No. 1 threaded hole of 10 left side upper end of servo oil circuit block On, the identical pressure sensor 9 of 2 structures receives P200H series shock resistance type pressure sensors using the U.S. hundred, and electric wire connects It is connected on the X3 interfaces of input/output module 15.

The identical plug-in solenoid directional control valve 11 of 2 structures is mounted on 3 on the left of 10 top end face of servo oil circuit block On number threaded hole.The identical plug-in solenoid directional control valve 11 of 2 structures selects the electricity of U.S. Vickers brand SBV11-12-C types Magnetic reversal valve, electric wire are connected on the X111 interfaces of input/output module 15.

The high frequency sound direction valve 12 is mounted on No. 4 threaded holes on the right side of 10 top end face of servo oil circuit block, high frequency sound Direction valve 12 uses the 3-position 4-way high frequency sound direction valve of Germany Rexroth brand 4WRTE models, electric wire to be connected to input On the X3 interfaces of output module 15.

2. loading system

Refering to fig. 1, the loading system includes servo motor 2, reducer stent 3, retarder 4 and technical weights 5.

The reducer stent 3 is L shaped plate class welding support, by orthogonal vertical plate, base board and reinforcing rib Composition.The round tube hole of four installation retarders 4 is set on vertical plate, is arranged on base board there are four round tube hole, base board uses Screw is mounted at 4 threaded holes of 611 front end face of pedestal lower cover, the vertical plate in reducer stent 3 and pedestal lower cover 611 is perpendicular.

The retarder 4 uses Siemens SP+ series planet speed reducer gearboxes, 4 left side square installation of retarder It is provided with the threaded hole of installation servo motor 2 on plate, is arranged on the mounting plate of 4 bottom end of retarder square there are four threaded hole, Retarder 4 is mounted on the vertical plate of reducer stent 3 using screw, the output shaft of retarder 4 is inserted into oscillating spindle 606 In the round inner stopper of swinging head front end face lower part；There are one round seam allowances for the left side setting of retarder 4, for installing servo The output shaft of motor 2；Its left side circle seam allowance surrounding is also set up there are four screw hole, for servo motor 2 to be fixedly mounted.

The servo motor 2 uses Siemens 1FK7 series of servo motors, in servo motor 2 in built-in servo motor Encoder 25 is set, servo motor 2 is mounted on using screw on four screw holes of 4 left side of retarder, the output of servo motor 2 Axis is inserted into the round inner stopper of 4 left side of retarder, and the motor cable of servo motor 2 is connected to single motor drive module 24 On X1 interfaces, the signal cable of servo motor built-in encoder 25 is connected to single motor drive module 24 in servo motor 2 On X202 interfaces.

The technical weights 5 are fixed on the technical weights 5 that different weight is loaded in the T-slot on oscillating spindle 606, It can be with the cutter of simulation loading different weight, for simulating real working condition.

3. control system

Refering to fig. 1 and Fig. 6, the control system include operation console 13 and laser interferometer 14；

Operation console 13 includes input/output module 15,24V power supplys 16, operation panel 17, mouse 18, Siemens 840Ds l System 19, analog-driven interface module 20, keyboard 21, numerical control unit 22, adjustment type power module 23, single motor drive module 24, direct measuring system 26.

The operation console 13 is qin formula operation console, is divided into upper, middle and lower three parts.Top is used for installation operation Panel 17, the extension at middle part are used for installing mouse 18, keyboard 21 and switch button etc..Lower part is square chest type structure, is used for Electric components are installed.

Siemens's 840Dsl systems 19 are the cores of control system, 24V power supplys 16, operation panel 17, mouse 18, Keyboard 21, numerical control unit 22 are connected with Siemens 840Dsl systems 19 respectively.

The laser interferometer 14 is mounted on the ground in 1 left side of workbench.Laser interferometer 14 uses Britain thunder Buddhist nun The XL-80 that continues calibrates laser interferometer, and electric wire is connected on the X3-1 interfaces of input/output module 15.

The input/output module 15 is using Siemens's 72/48D 2/2A PN input/output modules.Using electrical connection Its X2 interface end is connected by line with the X126 interface ends of numerical control unit 22；The X3-1 interfaces of input/output module 15 pass through electrical Connecting line is connected with laser interferometer 14, and the X3-2 interfaces of input/output module 15 pass through electrical cable and pressure sensor 9 are connected, and the X3-3 interfaces of input/output module 15 are connected by electrical cable with high frequency sound direction valve 12, input and output The X111 interfaces of module 15 are connected by electrical cable with plug-in solenoid directional control valve 11.

The 24V power supplys 16 are mainly that Siemens's 840Dsl systems 19 provide DC24V power supplys, and electric wire is connected to west The X1 interfaces of the sub- 840Dsl systems of door 19.

The operation panel 17 uses 012 operation panels of Siemens OP, is mounted on the front panel on 13 top of operation console On, electric wire is connected to the flat multicore spigot of Siemens's 840Dsl systems 19.

The mouse 18 is mounted on the upper surface of extension before operation console 13, and electric wire is connected to Siemens At the USB interface of 840Dsl systems 19.

The keyboard 21 is mounted on the upper surface of 13 middle part extension of operation console, and electric wire is connected to Siemens The USB2 interfaces of 840Dsl systems 19.

The analog-driven interface module 20 uses Siemens ADI4 analog-driven modules, by electrical cable by its X2 interface end is connected with the X126 interface ends of numerical control unit 22；The X4-1 interfaces of analog-driven interface module 20 are by electrically connecting Wiring is connected with grating scale 625 built in servo-cylinder.

The numerical control unit 22 is the centre of Siemens's 840Dsl systems 19 using Siemens's NCU720 numerical control units Device is managed, mainly for the treatment of all CNC, PLC communication tasks.By cable by its X120 interface and Siemens's 840Dsl systems 19 ETHERNET1 interfaces be connected.The X101 interfaces of numerical control unit 22 are connect by cable and the X200 of single motor drive module 24 Mouth is connected；Its X100 interface is connected by cable with the X200 interfaces of adjustment type power module 23.

The adjustment type power module 23 uses Siemens ALM adjustment type power modules, is mainly used for three-phase 380V Alternating current is changed into direct current, and power is provided for motor module.With cable by the X200 interface sum numbers of adjustment type power module 23 The X100 interfaces of control unit 22 are connected.

The single motor drive module 24 uses Siemens SMM single motor drive modules, is mainly used for controlling servo electricity The operation and speed governing of machine.Its X1 interface is connected by motor cable with servo motor 2；Its X202 interface by signal cable with Servo motor built-in encoder 25 built in servo motor 2 is connected；Its X203 interface passes through cable and direct measuring system 26 X500 interfaces be connected；Its X200 interface is connected by cable with the X101 interfaces of numerical control unit 22.

The direct measuring system 26 uses the direct measuring systems of Siemens SMC20, is mainly used for receiving, transmit and turning Change signal.Its X500 interface is connected by cable with the X203 interfaces of single motor module 24, and X520 interfaces pass through signal electricity Cable is connected with encoder 620.

Two, the test method of servo oscillating feed system reliability test

Servo oscillating feed system reliability test method of the present invention is to use foregoing servo oscillating The method carried out on the basis of feed system reliability test proposes a set of reliable for tested servo oscillating feed system Property test method.

Refering to Fig. 7, the step of servo oscillating feed system reliability test method, is as follows：

1. reliability test prepares

1) it is 20 ± 5 degrees Celsius to keep test ambient temperature constant, by servo oscillating feed system reliability test It places and is more than 12 hours in experimental enviroment；

2) technical weights 5 that different weight is loaded in the T-slot on oscillating spindle 606, can be with simulation loading difference weight The cutter of amount, for simulating real working condition；

3) the load torque of servo motor 2 is set in the controls；

4) servo oscillating feed system precision index allowable tolerance is set, precision index includes positioning accuracy, resetting The swing angle precision of precision and oscillating spindle 606.

2. detection and the record of reliability test data

1) start automatic control program, reliability test starts timing；

2) oscillating spindle 606 is back and forth followed according to the test procedure of setting between effective travel in servo oscillating feed system Ring is swung, by laser interferometer 14 measure oscillating spindle 606 positioning accuracy and repetitive positioning accuracy and real-time Transmission to west The sub- 840Dsl systems of door 19；By encoder 620 measure oscillating spindle 606 practical swing angle and real-time Transmission to Siemens 840Dsl systems 19；

3) data that Siemens 840Dsl systems 19 are detected using laser interferometer 14, the reality of oscillating spindle 606 Positioning accuracy that positioning accuracy, repetitive positioning accuracy and control system are set, repetitive positioning accuracy allowable tolerance compare, if real Actual value is greater than the set value, then judges that the servo oscillating feed system precision fails, be denoted as a precision failure of removal；Encoder The 620 practical swing angles for measuring oscillating spindle 606 allow with the swing angle that control system is set compared with difference, if practical Value is greater than the set value, then judges that the servo oscillating feed system precision fails, be denoted as a precision failure of removal；Control system is also Other failures are recorded, such as：Oil pressure is insufficient, Hydraulic Elements damage, oil leak, the failures such as control system alarm；If after breaking down, Then stop this reliability test, and records this time continuous time between failures of experiment；

3. the analysis of reliability test data

1) after the completion of reliability test, the fault data processing for statistical analysis to experiment acquisition utilizes FMECA points Analysis method evaluates the reliability level of tested servo oscillating feed system.

FMECA analysis methods are fault mode, influence and HAZAN (Failure Mode, Effects and Criticality Analysis, abbreviation FMECA), based on fault mode, is influenced using failure or consequence is the analysis of target Technology.The influence that it works to system by analyzing the different faults of each component part one by one, the weakness during identification designs comprehensively Link and key project, and essential information is provided for the reliability for evaluating and improving system design, flow is as shown in Figure 9：

α_i=n_i/n

The number that a certain position whole fault modes of n-occur；

In formula, ∑ t-system accumulated operating time at the appointed time；

The number to break down in a certain positions N-；

C_mi=α_iβ_iλ

(10) complete FMECA reports are exported.

2) during reliability test, if there is oil pressure, insufficient, Hydraulic Elements damage, oil leak, control system alarm Etc. failures when, then should stop testing immediately, analyze failure Producing reason, and to servo oscillating feed system reliability test fill It sets and is improved.

Heretofore described embodiment is for the ease of field technology personnel it will be appreciated that and with the application of the invention, this hair A kind of a kind of bright only example of optimization, or perhaps preferable specific technical solution.If relevant technical staff is adhering to In the case of basic technical scheme of the present invention, the equivalent structure variation for needing not move through creative work or various modifications are made all Within the scope of the present invention.

Claims

1. a kind of servo oscillating feed system reliability test, which is characterized in that the servo oscillating feed system can Include servo oscillating feed system, loading system and control system by property experimental rig；

The servo oscillating feed system includes workbench (1), pendulous device (6), servo oil circuit block assembly；

The loading system includes servo motor (2), reducer stent (3), retarder (4), technical weights (5)；

The control system includes operation console (13) and laser interferometer (14)；

The workbench (1) is fixedly connected on using foundation bolt on ground, and pendulous device (6) passes through on workbench (1) Round tube hole is mounted on the inclined wall of workbench (1), and is fixed by bolts on the inclined wall for being connected to workbench (1)；Servo Oil circuit block assembly is mounted on the upper end of workbench (1) right side；Reducer stent (3) is mounted on pendulous device (6) using bolt On the front end face of middle pedestal lower cover (611), retarder (4) is mounted on by its bottom end on the vertical plate of reducer stent (3), The output shaft of retarder (4) is inserted into the oscillating spindle (606) in pendulous device (6) in the circle of swinging head front end face lower part only Mouthful in, servo motor (2) using screw be mounted on retarder (4) left end mounting plate on, the output shaft of servo motor (2) with subtract Fast device (4) rigid connection, technical weights (5) are fixed in the T-slot on oscillating spindle (606)；Operation console (13) is mounted on work Make on the ground on the right side of platform (1), laser interferometer (14) is mounted on the ground on the left of workbench (1), operation console (13) and sharp Optical interferometer (14), loading system and servo oscillating feed system electric wire connect.

2. servo oscillating feed system reliability test described in accordance with the claim 1, which is characterized in that the work Platform (1) is to use iso-cross-section made of monoblock cast mode for the hollow structural component of multi-edge column-shaped, and workbench (1) is internally provided with Vertically and horizontally gusset is vertically and horizontally provided with loss of weight and the triangle through hole convenient for clear sand, the center of workbench (1) inclined wall on gusset There are one the round tube hole for installing the swinging base (601) in pendulous device (6), workbench (1) rear wall is provided with place's setting Facilitate the rectangular through-hole of repair and wiring, the bottom end of workbench (1) front and rear end is symmetrically arranged that there are five structure is identical Niche type fixed seat, bore that there are one the through-holes for being used for mounting foot bolt on its bottom surface, on the bottom wall of workbench (1) uniformly Ground setting is horizontally arranged with there are four being used for mitigating weight and convenient clear husky rectangular through-hole, workbench (1) sloped wall surface What is be mutually parallel is used for fixing the T-slot of pendulous device (6), and there are four install servo for the upper end setting of workbench (1) right side The threaded hole of oil path block holder (7).

3. servo oscillating feed system reliability test described in accordance with the claim 1, which is characterized in that the swing Device (6) includes swinging base (601), the identical sliding block (602) of 2 structures, rolling guide (603), rack (604), gear (605), the identical positioning pin (607) of oscillating spindle (606), 8 structures, oil cylinder fixed plate (608), servo-cylinder (609), base Seat upper cover plate (610), pedestal lower cover (611), No. 1 Biserial cylindrical roller bearing (612), No. 1 thrust ball bearing (613), No. 2 Double-row cylindrical roller axis (614), No. 1 bearing spacer (615), No. 2 thrust ball bearings (616), No. 2 bearing spacers (617), shaft ends Flange (618), encoder holder (619), encoder (620), encoder coupling (621), main shaft projecting shaft (622), end face Ring flange (623) and sealing ring (624)；

The rolling guide (603) is mounted on using screw on the guide-track groove of the roof of swinging base (601) inner cavity, 2 knots One end of the identical sliding block of structure (602) is sleeved on rolling guide (603), the other end of the identical sliding block (602) of 2 structures and Rack (604) is fixed by bolts connection without increment, and rack (604) has increment to engage connection with following gear (605), Gear (605) is mounted in swinging base (601) and is sleeved on oscillating spindle (606), gear (605) and oscillating spindle (606) it is connected using the identical positioning pin (607) of 8 structures between, oscillating spindle (606) is mounted on swinging base (601) Rear shell body wall through-hole and multi-diameter shaft cylinder in, No. 1 thrust ball bearing (613) is mounted on the rear annular groove of gear (605) rear end It is interior and be sleeved on the multi-diameter shaft of oscillating spindle (606), right end and the swinging base (601) of the multi-diameter shaft of oscillating spindle (606) Multi-diameter shaft cylinder between be sequentially installed with from front to back No. 2 double-row cylindrical roller axis (614), No. 1 bearing spacer (615), No. 2 Thrust ball bearing (616) and No. 2 bearing spacers (617) are equipped with boss (618) simultaneously on rear side of No. 2 bearing spacers (617) It is fixedly connected with the multi-diameter shaft of oscillating spindle (606) using screw, main shaft projecting shaft (622) is mounted on oscillating spindle (606) It in the rear end of multi-diameter shaft centre bore and adopts and is screwed, end flanges disk (623) is installed simultaneously on rear side of boss (618) It is fixedly connected with the multi-diameter shaft cylinder of swinging base (601) using screw, sealing ring (624) is mounted on end flanges disk (623) Seal groove in, encoder holder (619) using screw be mounted on end flanges disk (623) on, encoder (620) use screw On encoder holder (619), the front end of encoder coupling (621) is connected with main shaft projecting shaft (622), encoder The rear end of shaft coupling (621) is connected with encoder (620)；Pedestal upper cover plate (610) is mounted on swinging base (601) and adopts It is screwed, pedestal lower cover (611) is mounted on the swinging base (601) of pedestal upper cover plate (610) below and is sleeved on On the multi-diameter shaft of oscillating spindle (606), adopts and be screwed between pedestal lower cover (611) and swinging base (601), under pedestal No. 1 Biserial cylindrical roller bearing (612), oscillating spindle are installed between cover board (611) and the multi-diameter shaft of oscillating spindle (606) (606) rear end face of swinging head is connected with the front end face of pedestal lower cover (611), pedestal lower cover (611) rear end Boss and the preceding annular stopper of gear (605) front end connect.

4. servo oscillating feed system reliability test described in accordance with the claim 3, which is characterized in that the swing Main shaft (606) is made of swinging head and multi-diameter shaft；

The swinging head is vertically arranged by a cylindrical plate structure part formed with rectangle, swinging head front end face There are two T-slots for being used for fixing technical weights (5) being mutually parallel, is arranged one at the lower central of the front end face of swinging head For install retarder (4) output shaft round inner stopper, the keyway of installation key is provided on round inner stopper；

It is step-like axial workpiece that the multi-diameter shaft, which is outside inner hollow, is connected to be formed with the rear end face of swinging head A male half coupling is arranged in the rear end of oscillating spindle (606), multi-diameter shaft, and eight have been uniformly arranged on the circumference of male half coupling for pacifying The screw hole of boss (618) is filled, eight installation main shaft projecting shafts (622) have been uniformly arranged on the circumference of multi-diameter shaft rear end face Screw hole.

5. servo oscillating feed system reliability test described in accordance with the claim 3, which is characterized in that the swing Pedestal (601) is the shell structure part of T-shaped uniform thickness, and the inner cavity of swinging base (601) is the space of T-shaped uniform thickness, pendulum With right end it is open type before moving base (601), it is equal that the T-shaped periphery of swinging base (601) front end face is provided with width Outside flattened flange, be equably provided with for installation pedestal upper cover plate (610) and pedestal lower cover on flange (611) identical No. 1 bolt hole of structure；The left and right ends of the rear shell body wall of swinging base (601) are each provided with the peace of rectangle Seat is filled, it is identical for that will be swung using bolts and nuts to be respectively set that there are five structures in the mounting base of the rectangle of left and right ends Pedestal (601) is fixed on the dormant bolt through-hole on the inclined wall of workbench (1), the end face of swinging base (601) right-end openings On be equably provided with No. 2 screw holes for installation oil cylinder fixed plate (608), the rear shell body wall lower end of swinging base (601) Center at be provided with the multi-diameter shaft cylinder of multi-diameter shaft in installation oscillating spindle (606), rear shell body wall is linked to be with multi-diameter shaft cylinder Integrally, there are one rear shell body wall through-hole, the apertures of rear shell body wall through-hole for setting on the rear shell body wall being connected with multi-diameter shaft cylinder More than the aperture of multi-diameter shaft barrel front end endoporus, the aperture of 3 sections of endoporus of multi-diameter shaft cylinder back-end increases successively, rear shell body wall through-hole With the rotation conllinear of 4 sections of ladder shaft type endoporus of multi-diameter shaft cylinder, equably it is provided on the rear end face of multi-diameter shaft cylinder No. 3 screw holes of end face ring flange (623) are installed, the roof of swinging base (601) inner cavity is provided with a guide-track groove, guide-track groove On be equably provided with No. 4 threaded holes for installing rolling guide (603).

6. servo oscillating feed system reliability test described in accordance with the claim 1, which is characterized in that the servo Oil circuit block assembly includes that servo oil circuit block holder (7), the identical servo oil circuit pipe fitting (8) of 4 structures, 2 structures are identical The identical plug-in solenoid directional control valve (11) of pressure sensor (9), servo oil circuit block (10), 2 structures and high frequency sound direction valve (12)；

The identical pressure sensor (9) of 2 structures is mounted on 2 structure phases of servo oil circuit block (10) left side upper end On No. 1 same threaded hole, the identical servo oil circuit pipe fitting (8) of 2 structures is mounted on servo oil circuit block (10) left side lower end Identical No. 2 threaded holes of 2 structures on, the identical servo oil circuit pipe fitting (8) of another 2 structures is mounted on servo oil circuit block (10) on identical No. 5 threaded holes of 2 structures of right side, the identical plug-in solenoid directional control valve (11) of 2 structures is mounted on On identical No. 3 threaded holes of 2 structures on the left of servo oil circuit block (10) top end face, high frequency sound direction valve (12) is mounted on servo On identical No. 4 threaded holes of 4 structures on the right side of oil path block (10) top end face.

7. servo oscillating feed system reliability test described in accordance with the claim 1, which is characterized in that the control System includes that operation console (13) refers to laser interferometer (14)：

The operation console (13) includes input/output module (15), 24V power supplys (16), operation panel (17), mouse (18), west The sub- 840Dsl systems (19) of door, analog-driven interface module (20), keyboard (21), numerical control unit (22), adjustment type power module (23), single motor drive module (24) and direct measuring system (26)；

The electrical line end of the 24V power supplys (16) is connect with the X1 interfaces of Siemens's 840Dsl systems (19), operation panel (17) electrical line end is connect with the flat multicore socket of Siemens's 840Dsl systems (19), electrical line end and the west of mouse (18) The USB1 interfaces connection of the sub- 840Dsl systems (19) of door, electrical line end and the Siemens's 840Dsl systems (19) of keyboard (21) USB2 interfaces connect, and the X2 interface end of analog-driven interface module (20) uses the X126 of electrical cable and numerical control unit (22) Interface end is connected；The X100 interfaces of numerical control unit (22) are connected by cable with the X200 interfaces of adjustment type power module (23) It connects, the X101 interfaces of numerical control unit (22) are connected using cable with the X200 interfaces of single motor drive module (24)；Single motor The X203 interfaces of drive module (24) are connected by cable with the X500 interfaces of direct measuring system (26), input/output module (15) X2 interface end is connected using electrical cable with the X126 interface ends of numerical control unit (22), input/output module (15) Electrical cable is used between the output end of laser interferometer (14).

8. servo oscillating feed system reliability test described in accordance with the claim 1, which is characterized in that the operation Platform (13) and laser interferometer (14), loading system and servo oscillating feed system electric wire connection refer to：

The X3-1 interfaces of input/output module (15) in the operation console (13) use electrical cable and laser interferometer (14) output end connection, the X111 interfaces of input/output module (15) are using electrical cable and plug-in solenoid directional control valve (11) terminals are connected, and the X3-2 interfaces of input/output module (15) use electrical cable and pressure sensor (9) phase Connection, the X3-3 interfaces of input/output module (15) are connected by electrical cable with high frequency sound direction valve (12)；Operation console (13) the X4-1 interfaces of the analog-driven interface module (20) in are using electrical cable and grating scale (625) built in servo-cylinder It is connected, the X1 interfaces of the single motor drive module (24) in operation console (13) are connected by motor cable with servo motor (2) It connects, the X202 interfaces of single motor drive module (24) are compiled by the way that the servo motor built in signal cable and servo motor (2) is built-in Code device (25) is connected, and the X520 interfaces of the direct measuring system (26) in operation console (13) use signal cable and encoder (620) it is connected.

9. a kind of test method using servo oscillating feed system reliability test, which is characterized in that the use The step of test method of servo oscillating feed system reliability test, is as follows：

1) reliability test prepares

(1) it is 20 ± 5 degrees Celsius to keep test ambient temperature constant, and servo oscillating feed system reliability test is being tried It tests to place in environment and be more than 12 hours；

(2) technical weights (5) that different weight is loaded in the T-slot on oscillating spindle (606), can be with simulation loading difference weight The cutter of amount, for simulating real working condition；

(3) the load torque of servo motor (2) is set in the controls；

(4) servo oscillating feed system precision index allowable tolerance is set, precision index includes positioning accuracy, repetitive positioning accuracy With the swing angle precision of oscillating spindle (606)；

2) detection of reliability test data and record

(1) start automatic control program, reliability test starts timing；

(2) oscillating spindle (606) is back and forth followed according to the test procedure of setting between effective travel in servo oscillating feed system Ring is swung, and the positioning accuracy and repetitive positioning accuracy and real-time Transmission of oscillating spindle (606) are measured by laser interferometer (14) To Siemens's 840Dsl systems (19)；The practical swing angle of oscillating spindle (606) is measured by encoder (620) and is passed in real time Transport to Siemens's 840Dsl systems (19)；

(3) Siemens 840Dsl systems (19) utilize the data that laser interferometer (14) detects, the reality of oscillating spindle (606) Positioning accuracy that border positioning accuracy, repetitive positioning accuracy and control system are set, repetitive positioning accuracy allowable tolerance compare, if Actual value is greater than the set value, then judges that the servo oscillating feed system precision fails, be denoted as a precision failure of removal；Coding The practical swing angle that device (620) measures oscillating spindle (606) allows with the swing angle that control system is set compared with difference, If actual value is greater than the set value, judges that the servo oscillating feed system precision fails, be denoted as a precision failure of removal；Control System also records other failures, such as：Oil pressure is insufficient, Hydraulic Elements damage, oil leak, the failures such as control system alarm；If occurring After failure, then stop this reliability test, and records this time continuous time between failures of experiment；

3) analysis of reliability test data

(1) after the completion of reliability test, the fault data processing for statistical analysis to experiment acquisition is analyzed using FMECA Method evaluates the reliability level of tested servo oscillating feed system；

(2) during reliability test, if there is oil pressure, insufficient, Hydraulic Elements damage, the event such as oil leak, control system alarm When barrier, then should stop testing immediately, analyze failure Producing reason, and to servo oscillating feed system reliability test into Row improves.

10. a kind of test method using servo oscillating feed system reliability test according to claim 9, It is characterized in that, the reliability level that tested servo oscillating feed system is evaluated using FMECA analysis methods refers to：

(1) failure modes：Classified according to reliability test data result, counts trouble location, the event that each failure occurs Hinder reason and fault mode；

(2) the qualitative effect analysis of fault mode：The possibility occurrence of each fault mode is divided into discrete rank, then Analysis personnel evaluate each fault mode by defined rank, including probability of malfunction grade, severity grade Evaluation；

Failure rate grade is divided into A grades of failures frequent occurrence, and B grades of failures occur sometimes, and C grades of failures accidentally occur, and D grades of failures are seldom Occur, E grades of failures seldom occur；

(4) fault mode frequency ratio is calculated：Fault mode frequency ratio α_iIt is the ratio that plant failure performance is determining fault mode Rate, expression formula are：

α_i=n_i/n

The number that a certain position whole fault modes of n-occur；

(5) determine that failure influences probability：Failure influences probability β_iRefer to when assuming that certain fault mode has occurred and that, leading to determination The final condition of severity grade influences probability；

β=1 indicates to damage certainly, and the expressions of β=0.5 may damage, and the expressions of β=0.1 seldom damage；The tables of β=0 Show no influence；

In formula, ∑ t-system accumulated operating time at the appointed time；

The number to break down in a certain positions N-；

(7) each pattern and harm to the system degree are calculated：Fault mode density of infection C_miIt is a part for harm to the system degree, the i-th of product A fault mode density of infection C_miIt can be calculated by following formula：

C_mi=α_iβ_iλ

(8) system core position is determined：The key position of whole system is determined according to the fault mode density of infection at each position；

(9) corrective measure or suggestion are proposed：According to the size of density of infection, by significance level to key position propose corrective measure or It is recommended that；

(10) complete FMECA reports are exported.