CN203629828U - Rated constant load and dynamic load and service life testing device of ball screw rod assembly - Google Patents

Rated constant load and dynamic load and service life testing device of ball screw rod assembly Download PDF

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Publication number
CN203629828U
CN203629828U CN201320843017.4U CN201320843017U CN203629828U CN 203629828 U CN203629828 U CN 203629828U CN 201320843017 U CN201320843017 U CN 201320843017U CN 203629828 U CN203629828 U CN 203629828U
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China
Prior art keywords
arranges
headstock
worktable
lathe bed
loading
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CN201320843017.4U
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Chinese (zh)
Inventor
欧屹
丁聪
冯虎田
徐益飞
韩军
祖莉
陶卫军
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Nanjing University of Science and Technology
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Nanjing University of Science and Technology
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Abstract

The utility model discloses a rated constant load and dynamic load and service life testing device of a ball screw rod assembly. A head support supporting part, a workbench part, and a tail support supporting part are disposed on a latch bed. The head support supporting part and the tail support supporting part are respectively located at two ends of the latch bed, the workbench part is mounted on two parallel supporting rails, a driving part and a loading part are disposed on an end side of the latch bed, and the tail support supporting part is disposed on a horizontal V rail of the latch bed. The head part and the tail part of the screw rod to be tested are fixed with the head part and the tail part of the loading screw rod respectively through the head support supporting part and the tail support supporting part. A nut of the screw rod to be tested is fixedly connected with a nut of the loading screw rod on the workbench. A serve electric motor drives the screw rod to be tested to rotate, and the nut of the screw rod to be tested drives the workbench to move back and forth in a straight line on the latch bed, and the nut of the loading screw rod transmits a damp to the nut of the screw rod to be tested through the workbench, and provides a load. A current value of an adjustment eddy current breaker is used for controlling the load force. The testing device is capable of testing the rated constant load and the dynamic load and the service life of the ball screw rod assembly, high in efficiency and reliable in test data.

Description

A kind of ball screw assembly, dynamic load rating and life test apparatus
Technical field
The utility model belongs to mechanical hook-up technical field of measurement and test in serviceable life, particularly a kind of ball screw assembly, dynamic load rating and life test apparatus and method.
Background technology
Because ball screw assembly, has, transmission efficiency is high, highly sensitive, stable drive: wear and tear little, the life-span is long; Can eliminate end play, improve the advantages such as axial rigidity, be widely used as the feeding transmission system of middle-size and small-size numerically-controlled machine.Thereby its index of aging has a significant impact the processing characteristics of numerically-controlled machine.Guarantee numerically-controlled machine safe and reliable operation, reduce the shutdown causing because of the fault of ball screw assembly, affects production as far as possible, and prediction and to extend its maintenance cycle etc. be current more popular problem.China and international most advanced level also have larger gap, are wanting in apart from particularly evident especially at some high-performance, high-precision high-end machine tool product.China is as one of maximum in the world lathe producing country, Product Precision index, load-bearing capacity index all reach international water product, but as life-span, dynamic load rating etc. exist certain gap compared with developed countries, limit homemade goods applying in the advanced CNC.Thereby wish to improve the parameter such as structure, material, process of surface treatment, lubricating system of ball-screw, and reduce the wearing and tearing of raceway and steel ball, extend leading screw service time as far as possible, improve the lathe life-span; Develop a kind of Fast Evaluation ball-screw dynamic load rating and the research technique in life-span, for product selects to provide foundation simultaneously.
At present, the combination property of the test unit spininess of domestic ball-screw to lead screw pair, the research and development field of the specified dynamic load of ball screw assembly, and life test apparatus is almost blank, and the independently developed life test machine of some producer also lacks the ability of simulating various actual conditions, cannot simulate actual loaded, not reach loading requirement.
Utility model content
The technical matters that the utility model solves is to provide a kind of ball screw assembly, dynamic load rating and life test apparatus.
The technical solution that realizes the utility model object is: a kind of ball screw assembly, dynamic load rating and life test apparatus, comprise driver part, loading component, headstock support component, worktable part, tailstock support component and lathe bed parts, wherein headstock support component, worktable part and tailstock support component are all positioned on lathe bed parts, worktable part is between headstock support component and tailstock support component, and driver part and loading component are all positioned at the end of lathe bed parts;
Described worktable part comprises static torque sensor stand, static torque sensor, moment of torsion STATEMENT OF FEDERALLY SPONSORED, pulling force sensor, worktable, tank chain, flexible clamping mechanism, nut support unit, line oiler, long grating reading connector, slide block, vibration transducer and temperature sensor;
Work top comprises two duplicate worktable, these two worktable axially connect by pulling force sensor, flexible clamping mechanism and static torque sensor stand are all set on each worktable, on each static torque sensor stand, static torque sensor is all set, the quantity of nut support unit is two, these two nut support unit lay respectively on two worktable, while surveying static torque, flexible clamping mechanism stretches out and grip nut support unit, this nut support unit transmits torque on static torque sensor by the moment of torsion STATEMENT OF FEDERALLY SPONSORED being in contact with it, the bottom surface of each worktable all arranges two slide blocks, and the axial sides of work top arranges vibration transducer, temperature sensor and long grating reading connector, and the upper surface of each worktable all arranges line oiler, and the radial side of work top arranges a tank chain,
Described tailstock support component comprises tailstock, tailstock comprises two identical loading modules and cushion pad, described cushion pad is between two loading modules and be positioned at the axial sides of tailstock, each loading module includes tapered sleeve, combination bearing mechanism, ring flange, one side of loading module arranges ring flange, the inside of loading module arranges tapered sleeve, and tapered sleeve inner arranges combination bearing mechanism, and ring flange and tapered sleeve coaxially arrange; One end of tested leading screw is carried in a combination bearing mechanism, and another combination bearing mechanism carrying loads one end of leading screw;
Described lathe bed parts comprise the first supporting guide pair, the second supporting guide pair, lathe bed, extreme displacement sensor, extreme displacement sensor support base, limit switch, grating scale, beam, lubricating pump, long grating reading head, the end face of lathe bed arranges two the first supporting guide pair and the second supporting guide pairs that are parallel to each other, between two supporting guide pairs, grating scale is set, grating scale and two supporting guide pairs are parallel to each other, long grating reading head is set on grating scale, the upper surface of lathe bed has flat-V guide rail and T-shaped groove, the bearing of trend of the two is parallel to each other, the both sides, end of lathe bed all arrange beam, one side of lathe bed arranges limit switch and extreme displacement sensor support base, extreme displacement sensor is set on extreme displacement sensor support base, the opposite side of lathe bed arranges lubricating pump, two worktable of work top respectively the slider support by separately in two supporting guide pairs of lathe bed upper surface,
Driver part comprises servomotor, adjustment of displacement plate, motor base, synchronous pulley, Timing Belt, servomotor output shaft end arranges synchronous pulley, this first synchronous pulley connects the first Timing Belt, and servomotor bottom arranges adjustment of displacement plate, and adjustment of displacement plate bottom arranges motor base;
Loading component comprises adjustment of displacement plate, electric eddy current brake, shaft coupling, brake support frame, synchronous pulley, Timing Belt, flat key axle, electric eddy current brake output shaft is connected with the flat key axle of brake support frame by shaft coupling, one end of flat key axle arranges the second synchronous pulley, this second synchronous pulley connects the second Timing Belt, and electric eddy current brake and brake support frame bottom arrange adjustment of displacement plate;
Headstock support component comprises the supporting mechanism that two covers are identical, Mei Tao mechanism includes synchronous pulley, circle magnetic grid, the headstock, the first shaft coupling, dynamic torque sensor, the second shaft coupling, headstock supporting plate, headstock spindle, on headstock supporting plate, the headstock is set, headstock spindle runs through the headstock, headstock spindle one end arranges headstock synchronous pulley and circle magnetic grid, the other end of headstock spindle is connected with the first shaft coupling, the other end of the first shaft coupling is connected with dynamic torque sensor, the other end of dynamic torque sensor is connected with the second shaft coupling, and the other end of the second shaft coupling connects leading screw to be measured; On above-mentioned two headstock synchronous pulleys, cover has the first Timing Belt and the second Timing Belt respectively.
A kind of ball screw assembly, dynamic load rating checking test method based on said apparatus, between headstock support component and tailstock support component, pack one group of lead screw pair into, nut is fixed on nut support unit simultaneously, tested leading screw is synchronously driven by servomotor, worktable axially reciprocating, drive and load guide screw movement, electric eddy current brake oppositely loads, adjust electric current, make the loading force that electric eddy current brake provides reach fast demarcation dynamic load rating, nut drives worktable to-and-fro movement on lathe bed, make to load leading screw and tested leading screw moves and turns for 1,000,000 times continuously under dynamic load rating loading environment, react the characteristic of tired spot corrosion by each sensor collection, if wherein only have 10% with interior product, tired spot corrosion to occur, it is rationally credible that this product is demarcated dynamic load rating.
A kind of method of ball screw assembly, determination test fatigue lifetime based on said apparatus, between headstock support component and tailstock support component, pack one group of lead screw pair into, nut is fixed on nut support unit simultaneously, tested leading screw is synchronously driven by servomotor, worktable axially reciprocating, drive and load leading screw, electric eddy current brake oppositely loads, adjust electric current, make loading force rapid loading that electric eddy current brake provides to demarcating dynamic load rating, and it is constant to control electric current nominal, nut drives worktable to-and-fro movement on lathe bed, react the characteristic of tired spot corrosion by each sensor collection, insincere in nominal rating dynamic loading, or under indefinite actual dynamic load rating or actual life condition, complete the measurement in ball screw assembly, life-span by this operation.
Compared with prior art, its remarkable advantage is the utility model: 1) device of the present utility model can carry out specified dynamic load and the durability test of two same specification lead screw pair (initiatively lead screw pair and loading lead screw pair) simultaneously, and test efficiency is high; 2) the utility model adopts electric eddy current brake to drive loading leading screw that loading force is provided, can be according to the corresponding loading force of the different outfit of the model of lead screw pair, and loading force is stable, and size is controlled, and the loading system life-span is high; 3) on worktable of the present utility model, design two cover leading screw nut clip and held device, can measure at the volley dynamic torque and stall time, measured static friction moment of torsion; 4) support unit adopts elastic conical drogue design end to end, and convenient frequent test is changed, and overlaps frock more and meets different model test specimen; 5) test macro has been realized on-line testing, detects in real time the variation of lead screw pair performance and precision, guarantees authenticity, continuity and the reliability of test; 6) by the on-line testing of acceleration transducer, vibration transducer, temperature sensor, noise transducer, reflected in real time the performance change of lead screw pair in durability test process, test data is reliable continuously.And combining image pick-up transducers reflects the generation of tired spot corrosion, complete the monitoring to fatigue life test.
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the general structure component diagram of the utility model ball screw assembly, dynamic load rating and endurance testing device.
Fig. 2 is the general structure schematic diagram of the utility model ball screw assembly, dynamic load rating and endurance testing device.
Fig. 3 is the utility model ball screw assembly, dynamic load rating and endurance testing device driver part figure.
Fig. 4 is the utility model ball screw assembly, dynamic load rating and endurance testing device loading component figure.
Fig. 5 is the utility model ball screw assembly, dynamic load rating and endurance testing device headstock support component figure.
Fig. 6 is the utility model ball screw assembly, dynamic load rating and endurance testing device worktable part figure.
Fig. 7-A, 7-B are the utility model ball screw assembly, dynamic load rating and endurance testing device tailstock support component figure, and wherein Fig. 7-A is whole structure figure, and Fig. 7-B is cut-open view.
Fig. 8 is the utility model ball screw assembly, dynamic load rating and endurance testing device lathe bed component diagram.
Fig. 9 is the utility model ball screw assembly, dynamic load rating and endurance testing device dynamic load rating checking process flow chart.
Figure 10 is that the utility model ball screw assembly, dynamic load rating and endurance testing device are measured process flow chart fatigue lifetime.
Embodiment
A kind of ball screw assembly, dynamic load rating and life test apparatus, comprise driver part I, loading component II, headstock support component III, worktable part IV, tailstock support component V and lathe bed parts VI, wherein headstock support component III, worktable part IV and tailstock support component V are all positioned in lathe bed parts VI, worktable part IV is between headstock support component III and tailstock support component V, and driver part I and loading component II are all positioned at the end of lathe bed parts VI;
Described worktable part IV comprises static torque sensor stand 16, static torque sensor 17, moment of torsion STATEMENT OF FEDERALLY SPONSORED 18, pulling force sensor 19, worktable 20, tank chain 21, flexible clamping mechanism 30, nut support unit 39, line oiler 40, long grating reading connector 41, slide block 49, vibration transducer 50 and temperature sensor 51;
Work top comprises two duplicate worktable 20, these two worktable axially connect by pulling force sensor 19, flexible clamping mechanism 30 and static torque sensor stand 16 are all set on each worktable 20, on each static torque sensor stand 16, static torque sensor 17 is all set, the quantity of nut support unit 39 is two, these two nut support unit lay respectively on two worktable, while surveying static torque, flexible clamping mechanism 30 stretches out and grip nut support unit 39, this nut support unit 39 transmits torque on static torque sensor 17 by the moment of torsion STATEMENT OF FEDERALLY SPONSORED 18 being in contact with it, the bottom surface of each worktable 20 all arranges two slide blocks 49, the axial sides of work top arranges vibration transducer 50, temperature sensor 51 and long grating reading connector 41, the upper surface of each worktable 20 all arranges line oiler 40, and the radial side of work top arranges a tank chain 21,
Described tailstock support component V comprises tailstock 22, tailstock 22 comprises two identical loading modules and cushion pad 42, described cushion pad 42 is between two loading modules and be positioned at the axial sides of tailstock 22, each loading module includes tapered sleeve 43, combination bearing mechanism 44, ring flange 45, one side of loading module arranges ring flange 45, the inside of loading module arranges tapered sleeve 43, and tapered sleeve 43 inside arrange combination bearing mechanism 44, and ring flange 45 coaxially arranges with tapered sleeve 43; One end of tested leading screw 34 is carried in a combination bearing mechanism 44, and another combination bearing mechanism 44 carryings load one end of leading screw 33;
Described lathe bed parts VI comprises the first supporting guide pair 23, the second supporting guide pair 25, lathe bed 24, extreme displacement sensor 26, extreme displacement sensor support base 27, limit switch 28, grating scale 31, beam 32, lubricating pump 46, long grating reading head 47, the end face of lathe bed 24 arranges two the first supporting guides that are parallel to each other secondary 23 and the second supporting guide pair 25, between two supporting guide pairs, grating scale 31 is set, grating scale 31 and two supporting guide pairs are parallel to each other, long grating reading head 47 is set on grating scale 31, the upper surface of lathe bed 24 has flat-V guide rail and T-shaped groove, the bearing of trend of the two is parallel to each other, the both sides, end of lathe bed 24 all arrange beam 32, one side of lathe bed 24 arranges limit switch 28 and extreme displacement sensor support base 27, extreme displacement sensor 26 is set on extreme displacement sensor support base 27, the opposite side of lathe bed arranges lubricating pump 46, two worktable of work top respectively the slider support by separately in two supporting guide pairs of lathe bed 24 upper surfaces,
Driver part I comprises servomotor 1, adjustment of displacement plate 2, motor base 3, synchronous pulley 35, Timing Belt 36, servomotor 1 output shaft end arranges synchronous pulley 35, this first synchronous pulley 35 connects the first Timing Belt 36, servomotor 1 bottom arranges adjustment of displacement plate 2, and adjustment of displacement plate 2 bottoms arrange motor base 3;
Loading component II comprises adjustment of displacement plate 4, electric eddy current brake 5, shaft coupling 6, brake support frame 7, synchronous pulley 8, Timing Belt 9, flat key axle 48, electric eddy current brake 5 output shafts are connected with the flat key axle 48 of brake support frame 7 by shaft coupling 6, one end of flat key axle 48 arranges the second synchronous pulley 8, this second synchronous pulley 8 connects the second Timing Belt 9, and electric eddy current brake 5 arranges adjustment of displacement plate 4 with brake support frame 7 bottoms;
Headstock support component III comprises the supporting mechanism that two covers are identical, Mei Tao mechanism includes synchronous pulley 10, circle magnetic grid 11, the headstock 12, the first shaft coupling 13, dynamic torque sensor 14, the second shaft coupling 15, headstock supporting plate 37, headstock spindle 38, the headstock 12 is set on headstock supporting plate 37, headstock spindle 38 runs through the headstock 12, headstock spindle 38 one end arrange headstock synchronous pulley 10 and circle magnetic grid 11, the other end of headstock spindle 38 is connected with the first shaft coupling 13, the other end of the first shaft coupling 13 is connected with dynamic torque sensor 14, the other end of dynamic torque sensor 14 is connected with the second shaft coupling 15, the other end of the second shaft coupling 15 connects leading screw to be measured, on above-mentioned two headstock synchronous pulleys, cover has the first Timing Belt 36 and the second Timing Belt 9 respectively.
A kind of ball screw assembly, dynamic load rating checking test method based on said apparatus, between headstock support component III and tailstock support component V, pack one group of lead screw pair into, nut 29 is fixed on nut support unit 39 simultaneously, tested leading screw 34 is synchronously driven by servomotor 1, worktable 20 axially reciprocatings, drive loading leading screw 33 to move, electric eddy current brake 5 oppositely loads, adjust electric current, make the loading force that electric eddy current brake 5 provides reach fast demarcation dynamic load rating, nut 29 drives worktable 20 to-and-fro movement on lathe bed 24, make to load leading screw 33 and tested leading screw 34 moves and turns for 1,000,000 times continuously under dynamic load rating loading environment, react the characteristic of tired spot corrosion by each sensor collection, if wherein only have 10% with interior product, tired spot corrosion to occur, it is rationally credible that this product is demarcated dynamic load rating.
A kind of method of ball screw assembly, determination test fatigue lifetime based on said apparatus, between headstock support component III and tailstock support component V, pack one group of lead screw pair into, nut 29 is fixed on nut support unit 39 simultaneously, tested leading screw 34 is synchronously driven by servomotor 1, worktable 20 axially reciprocatings, drive and load leading screw 33, electric eddy current brake 5 oppositely loads, adjust electric current, make loading force rapid loading that electric eddy current brake 5 provides to demarcating dynamic load rating, and it is constant to control electric current nominal, nut 29 drives worktable 20 to-and-fro movement on lathe bed 24, react the characteristic of tired spot corrosion by each sensor collection, insincere in nominal rating dynamic loading, or under indefinite actual dynamic load rating or actual life condition, complete the measurement in ball screw assembly, life-span by this operation.
Below in conjunction with accompanying drawing, describe.
In conjunction with Fig. 1 and Fig. 2, a kind of ball screw assembly, dynamic load rating of the present utility model and life test apparatus, comprise driver part I, loading component II, headstock support component III, worktable part IV, tailstock support component V and lathe bed parts VI, wherein headstock support component III, worktable part IV and tailstock support component V are all positioned in lathe bed parts VI, worktable part IV is between headstock support component III and tailstock support component V, and driver part I and loading component II are all positioned at the end of lathe bed parts VI.
In conjunction with Fig. 3, described driver part I comprises servomotor 1, adjustment of displacement plate 2, motor base 3, the first synchronous pulley 35, the first Timing Belt 36, servomotor 1 output shaft end arranges synchronous pulley 35, this first synchronous pulley 35 connects the first Timing Belt 36, servomotor 1 bottom arranges adjustment of displacement plate 2, and adjustment of displacement plate 2 bottoms arrange motor base 3.
In conjunction with Fig. 4, described loading component II comprises adjustment of displacement plate 4, electric eddy current brake 5, shaft coupling 6, brake support frame 7, the second synchronous pulley 8, the second Timing Belt 9, flat key axle 48, electric eddy current brake 5 output shafts are connected with the flat key axle 48 of brake support frame 7 by shaft coupling 6, one end of flat key axle 48 arranges the second synchronous pulley 8, this second synchronous pulley 8 connects the second Timing Belt 9, and electric eddy current brake 5 arranges adjustment of displacement plate 4 with brake support frame 7 bottoms.
In conjunction with Fig. 5, described headstock support component III comprises the supporting mechanism that two covers are identical, Mei Tao mechanism includes synchronous pulley 10, circle magnetic grid 11, the headstock 12, the first shaft coupling 13, dynamic torque sensor 14, the second shaft coupling 15, headstock supporting plate 37, headstock spindle 38, the headstock 12 is set on headstock supporting plate 37, headstock spindle 38 runs through the headstock 12, headstock spindle 38 one end arrange synchronous pulley 10 and circle magnetic grid 11, the other end of headstock spindle 38 is connected with the first shaft coupling 13, the other end of the first shaft coupling 13 is connected with dynamic torque sensor 14, the other end of dynamic torque sensor 14 is connected with the second shaft coupling 15, the other end of the second shaft coupling 15 connects leading screw to be measured, on above-mentioned two headstock synchronous pulleys, cover has the first Timing Belt 36 and the second Timing Belt 9 respectively.
In conjunction with Fig. 6, described worktable part IV comprises static torque sensor stand 16, static torque sensor 17, moment of torsion STATEMENT OF FEDERALLY SPONSORED 18, pulling force sensor 19, worktable 20, tank chain 21, nut 29, flexible clamping mechanism 30, nut support unit 39, line oiler 40, long grating reading connects 41, slide block 49, vibration transducer 50, temperature sensor 51, work top comprises two duplicate worktable 20, these two worktable axially connect by pulling force sensor 19, flexible clamping mechanism 30 and static torque sensor stand 16 are all set on each worktable 20, on each static torque sensor stand 16, static torque sensor 17 is all set, the quantity of nut support unit 39 is two, these two nut support unit lay respectively on two worktable, while surveying static torque, flexible clamping mechanism 30 stretches out and grip nut support unit 39, this nut support unit 39 transmits torque on static torque sensor 17 by the moment of torsion STATEMENT OF FEDERALLY SPONSORED 18 being in contact with it, the bottom surface of each worktable 20 all arranges two slide blocks 49, and the axial sides of work top arranges vibration transducer 50, temperature sensor 51 and long grating reading connector 41, the upper surface of each worktable 20 all arranges line oiler 40, and the radial side of work top arranges a tank chain 21,
In conjunction with Fig. 7, described tailstock support component V comprises tailstock 22, tailstock 22 comprises two identical loading modules and cushion pad 42, described cushion pad 42 is between two loading modules and be positioned at the axial sides of tailstock 22, each loading module includes tapered sleeve 43, combination bearing mechanism 44, ring flange 45, one side of loading module arranges ring flange 45, the inside of loading module arranges tapered sleeve 43, tapered sleeve 43 inside arrange combination bearing mechanism 44, and ring flange 45 coaxially arranges with tapered sleeve 43; One end of tested leading screw 34 is carried in a combination bearing mechanism 44, and another combination bearing mechanism 44 carryings load one end of leading screw 33;
In conjunction with Fig. 8, described lathe bed parts VI comprises the first supporting guide pair 23, the second supporting guide pair 25, lathe bed 24, extreme displacement sensor 26, extreme displacement sensor support base 27, limit switch 28, grating scale 31, beam 32, lubricating pump 46, long grating reading head 47, the end face of lathe bed 24 arranges two the first supporting guides that are parallel to each other secondary 23 and the second supporting guide pair 25, between two supporting guide pairs, grating scale 31 is set, grating scale 31 and two supporting guide pairs are parallel to each other, long grating reading head 47 is set on grating scale 31, the upper surface of lathe bed 24 has flat-V guide rail and T-shaped groove, the bearing of trend of the two is parallel to each other, the both sides, end of lathe bed 24 all arrange beam 32, one side of lathe bed 24 arranges limit switch 28 and extreme displacement sensor support base 27, extreme displacement sensor 26 is set on extreme displacement sensor support base 27, the opposite side of lathe bed arranges lubricating pump 46, two worktable of work top respectively the slider support by separately in two supporting guide pairs of lathe bed 24 upper surfaces.
Carry out the description of more refinement below:
As shown in Figure 3, motor base 3 fixes on the ground, servomotor 1 is connected in adjustment of displacement version 2, servomotor 1 axial restraint, left and right adjustable distance, in 20mm, is fixed the first synchronous pulley 35, the first synchronous pulleys 35 and is put the first Timing Belt 36 on the output shaft of servomotor 1, servomotor 1 adopts high-power, can meet the specified dynamic load requirement of test 63 series with interior lead screw pair;
As shown in Figure 4, electric eddy current brake 6 is fixed on adjustment of displacement plate 4 with brake support frame 7, electric eddy current brake 6 axial restraints, left and right position adjustments scope is in 20mm, and the output shaft of electric eddy current brake 6 is connected with shaft coupling 6, and shaft coupling 6 is connected with flat key axle 48 one end, flat key axle 48 other ends second synchronous pulley 8 that is connected, the second synchronous pulley 8 puts the second Timing Belt 9, controls the damping that size of current regulates electric eddy current brake 6 to produce, and passes to and loads leading screw 33;
As shown in Figure 5, headstock support component III is made up of two parts same mechanism, be connected by the first Timing Belt 36 and the second Timing Belt 9 with driver part I and loading component II respectively, headstock supporting plate 37 is connected with lathe bed 24, the headstock 12 is positioned on headstock supporting plate 37, headstock spindle 38 one end are connected with synchronous pulley 10, on headstock spindle 38, pack round magneto-optic grid 11 into, headstock spindle 38 other ends connect the first shaft coupling 13, first shaft coupling 13 other ends are connected with dynamic torque sensor 14, second shaft coupling 15 one end are connected with dynamic torque sensor 14, the other end is connected with leading screw to be measured, dynamic torque sensor 14 is direct-connected with leading screw to be measured, can change with the torque value that loads leading screw 33 by the tested leading screw 34 of Measurement accuracy, the headstock 12 is taked to substitute frock, can meet the installation of different model lead screw pair.
As shown in Figure 6, work top is arranged on the slide block of the first supporting guide secondary 23 and the second supporting guide pair 25, worktable part is spliced by the worktable of two parts same structure, minim gap is left in front and back, the pulling force sensor 19 of installing by centre axially connects, this pulling force sensor 19 range 12t, can Measurement accuracy lead screw pair loading force, a static torque sensor 17 is set on each worktable, be fixed on static torque sensor stand 16, body 18 one end of moment of torsion interlock are simultaneously connected with static torque sensor 17, when tested static moment of torsion, moment of torsion interlock body 18 is connected with lead screw pair nut 29, flexible clamping mechanism is stretched for 30 times and fastening torque interlock body 18, can realize the measurement of static torque, in the time that work top 20 starts to drive lead screw pair motion, nut 29 is connected with nut bracket 39, nut bracket 39 is connected with worktable 20, can realize the accuracy of work top 20 integrated reciprocating motions.
As shown in Figure 6, the utility model can carry out the durability test of two ball screw assembly,s simultaneously, and one as tested leading screw 34, in a lead screw pair motion process as 33, two same specifications of loading leading screw, rotating in same direction, stressed size is identical, and test efficiency improves.
As shown in Figure 7, tailstock 22 is placed on the put down-V guide rail of lathe bed 26, tailstock 22 bottoms are fixed in T-shaped groove, can avoid tailstock 22 to horizontally slip, because axial location is adjustable, tailstock 22 is the installation of structure one, be convenient to regulate initiatively lead screw pair 34 and the depth of parallelism that loads lead screw pair 33, tailstock 22 axle sides arrange cushion pad 42, tailstock 22 inside connect conical sleeve 43 by flange 45, the interior combination bearing 44 that arranges of conical sleeve 43, can strengthen the load-bearing capacity of tailstock support component V, conical sleeve 43 is for can substitute frock, change according to the lead screw pair of different model, improve test efficiency.
As shown in Figure 8, lathe bed 24 fixes on the ground, two relevant parallel supporting guide pairs 23 are installed at lathe bed 24 tops, 25 with grating scale 31, grating reading head 47, the upper surface of lathe bed 24 has flat-V guide rail and two T-shaped grooves, be respectively used to support and limit tailstock support component V, in lathe bed 24 axle head both sides, beam 32 is installed, extreme displacement sensor 26 and limit switch 28 are installed in lathe bed side, extreme displacement switch 26 is controlled the stall of servomotor 1, limit switch 28 is controlled the rotating of servomotor 1, the generation of control system fault in prophylactic tria process.
As shown in Figure 9, above-mentioned test unit to the method for ball screw assembly, dynamic load rating test is: between headstock support component III and tailstock support component V, pack one group of lead screw pair into, nut 29 is fixed on nut support unit 39 simultaneously, tested leading screw 34 is synchronously driven by servomotor 1, worktable 20 axially reciprocatings, drive loading leading screw 33 to move, electric eddy current brake 5 oppositely loads, adjust electric current, make the loading force that electric eddy current brake 5 provides reach fast demarcation dynamic load rating, nut 29 drives worktable 20 to-and-fro movement on lathe bed 24, make to load leading screw 33 and tested leading screw 34 moves and turns for 1,000,000 times continuously under dynamic load rating loading environment, react the characteristic of tired spot corrosion by each sensor collection, if wherein only have 10% with interior product, tired spot corrosion to occur, it is rationally credible that this product is demarcated dynamic load rating.
As shown in figure 10, above-mentioned test unit to the method for ball screw assembly, fatigue life test is: between headstock support component III and tailstock support component V, pack one group of lead screw pair into, nut 29 is fixed on nut support unit 39 simultaneously, tested leading screw 34 is synchronously driven by servomotor 1, worktable 20 axially reciprocatings, drive and load leading screw 33, electric eddy current brake 5 oppositely loads, adjust electric current, make loading force rapid loading that electric eddy current brake 5 provides to demarcating dynamic load rating, and it is constant to control electric current nominal, nut 29 drives worktable 20 to-and-fro movement on lathe bed 24, react the characteristic of tired spot corrosion by each sensor collection, insincere in nominal rating dynamic loading, or under indefinite actual dynamic load rating or actual life condition, complete the measurement in ball screw assembly, life-span by this operation.
As from the foregoing, device of the present utility model can be tested dynamic load rating and the serviceable life of ball screw assembly,, and test efficiency is high, and test figure is true and reliable.

Claims (1)

1. a ball screw assembly, dynamic load rating and life test apparatus, it is characterized in that, comprise driver part [I], loading component [II], headstock support component [III], worktable part [IV], tailstock support component [V] and lathe bed parts [VI], wherein headstock support component [III], worktable part [IV] and tailstock support component [V] are all positioned on lathe bed parts [VI], worktable part [IV] is positioned between headstock support component [III] and tailstock support component [V], and driver part [I] and loading component [II] are all positioned at the end of lathe bed parts [VI];
Described worktable part [IV] comprises static torque sensor stand [16], static torque sensor [17], moment of torsion STATEMENT OF FEDERALLY SPONSORED [18], pulling force sensor [19], worktable [20], tank chain [21], flexible clamping mechanism [30], nut support unit [39], line oiler [40], long grating reading connector [41], slide block [49], vibration transducer [50] and temperature sensor [51];
Work top comprises two duplicate worktable [20], these two worktable axially connect by pulling force sensor [19], flexible clamping mechanism [30] and static torque sensor stand [16] are all set on each worktable [20], static torque sensor [17] is all set on each static torque sensor stand [16], the quantity of nut support unit [39] is two, these two nut support unit lay respectively on two worktable, while surveying static torque, flexible clamping mechanism [30] stretches out and grip nut support unit [39], this nut support unit [39] transmits torque on static torque sensor [17] by the moment of torsion STATEMENT OF FEDERALLY SPONSORED [18] being in contact with it, the bottom surface of each worktable [20] all arranges two slide blocks [49], the axial sides of work top arranges vibration transducer [50], temperature sensor [51] and long grating reading connector [41], the upper surface of each worktable [20] all arranges line oiler [40], and the radial side of work top arranges a tank chain [21],
Described tailstock support component [V] comprises tailstock [22], tailstock [22] comprises two identical loading modules and cushion pad [42], described cushion pad [42] is between two loading modules and be positioned at the axial sides of tailstock [22], each loading module includes tapered sleeve [43], combination bearing mechanism [44], ring flange [45], one side of loading module arranges ring flange [45], the inside of loading module arranges tapered sleeve [43], tapered sleeve [43] inside arranges combination bearing mechanism [44], and ring flange [45] coaxially arranges with tapered sleeve [43]; One end of tested leading screw [34] is carried in a combination bearing mechanism [44], and another combination bearing mechanism [44] carrying loads one end of leading screw [33];
Described lathe bed parts [VI] comprise the first supporting guide pair [23], the second supporting guide pair [25], lathe bed [24], extreme displacement sensor [26], extreme displacement sensor support base [27], limit switch [28], grating scale [31], beam [32], lubricating pump [46], long grating reading head [47], the end face of lathe bed [24] arranges two the first supporting guide pairs [23] that are parallel to each other and the second supporting guide pair [25], grating scale [31] is set between two supporting guide pairs, grating scale [31] is parallel to each other with two supporting guide pairs, long grating reading head [47] is set on grating scale [31], the upper surface of lathe bed [24] has flat-V guide rail and T-shaped groove, the bearing of trend of the two is parallel to each other, the both sides, end of lathe bed [24] all arrange beam [32], one side of lathe bed [24] arranges limit switch [28] and extreme displacement sensor support base [27], extreme displacement sensor [26] is set on extreme displacement sensor support base [27], the opposite side of lathe bed arranges lubricating pump [46], two worktable of work top respectively the slider support by separately in two supporting guide pairs of lathe bed [24] upper surface,
Driver part [I] comprises servomotor [1], adjustment of displacement plate [2], motor base [3], synchronous pulley [35], Timing Belt [36], servomotor [1] output shaft end arranges synchronous pulley [35], this first synchronous pulley [35] connects the first Timing Belt [36], servomotor [1] bottom arranges adjustment of displacement plate [2], and adjustment of displacement plate [2] bottom arranges motor base [3];
Loading component [II] comprises adjustment of displacement plate [4], electric eddy current brake [5], shaft coupling [6], brake support frame [7], synchronous pulley [8], Timing Belt [9], flat key axle [48], electric eddy current brake [5] output shaft is connected with the flat key axle [48] of brake support frame [7] by shaft coupling [6], one end of flat key axle [48] arranges the second synchronous pulley [8], this second synchronous pulley [8] connects the second Timing Belt [9], and electric eddy current brake [5] arranges adjustment of displacement plate [4] with brake support frame [7] bottom;
Headstock support component [III] comprises the supporting mechanism that two covers are identical, Mei Tao mechanism includes synchronous pulley [10], circle magnetic grid [11], the headstock [12], the first shaft coupling [13], dynamic torque sensor [14], the second shaft coupling [15], headstock supporting plate [37], headstock spindle [38], the headstock [12] is set on headstock supporting plate [37], headstock spindle [38] runs through the headstock [12], headstock spindle [38] one end arranges headstock synchronous pulley [10] and circle magnetic grid [11], the other end of headstock spindle [38] is connected with the first shaft coupling [13], the other end of the first shaft coupling [13] is connected with dynamic torque sensor [14], the other end of dynamic torque sensor [14] is connected with the second shaft coupling [15], the other end of the second shaft coupling [15] connects leading screw to be measured, on above-mentioned two headstock synchronous pulleys, cover has the first Timing Belt [36] and the second Timing Belt [9] respectively.
CN201320843017.4U 2013-12-20 2013-12-20 Rated constant load and dynamic load and service life testing device of ball screw rod assembly Withdrawn - After Issue CN203629828U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103712793A (en) * 2013-12-20 2014-04-09 南京理工大学 Ball screw pair rated dynamic load and life test device and method
CN104502097A (en) * 2015-01-08 2015-04-08 山东博特精工股份有限公司 Ball screw pair electric coupling servo loading device
CN106768973A (en) * 2017-01-16 2017-05-31 吉林大学 Linear rolling guide clamp reliability test and test method
CN109596350A (en) * 2018-12-24 2019-04-09 哈工大机器人(山东)智能装备研究院 A kind of on-line monitoring method and test platform of screw pair Life cycle
CN110618029A (en) * 2019-08-29 2019-12-27 南京理工大学 Method for testing fatigue elastic life of ball screw pair under extreme load extremely short time working condition

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103712793A (en) * 2013-12-20 2014-04-09 南京理工大学 Ball screw pair rated dynamic load and life test device and method
CN103712793B (en) * 2013-12-20 2016-04-20 南京理工大学 A kind of ball screw assembly, dynamic load rating and life test apparatus and method
CN104502097A (en) * 2015-01-08 2015-04-08 山东博特精工股份有限公司 Ball screw pair electric coupling servo loading device
CN104502097B (en) * 2015-01-08 2017-01-25 山东博特精工股份有限公司 Ball screw pair electric coupling servo loading device
CN106768973A (en) * 2017-01-16 2017-05-31 吉林大学 Linear rolling guide clamp reliability test and test method
CN109596350A (en) * 2018-12-24 2019-04-09 哈工大机器人(山东)智能装备研究院 A kind of on-line monitoring method and test platform of screw pair Life cycle
CN109596350B (en) * 2018-12-24 2020-09-01 哈工大机器人(山东)智能装备研究院 Online monitoring method and testing platform for full life cycle of screw pair
CN110618029A (en) * 2019-08-29 2019-12-27 南京理工大学 Method for testing fatigue elastic life of ball screw pair under extreme load extremely short time working condition

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