CN103323233B - Device and method for testing dynamic characteristics of single-screw or double-screw rolling supporting linear feed system - Google Patents
Device and method for testing dynamic characteristics of single-screw or double-screw rolling supporting linear feed system Download PDFInfo
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Abstract
The invention relates to a device and method for testing the dynamic characteristics of a single-screw or double-screw rolling supporting linear feed system. The device for testing the dynamic characteristics of a single-screw or double-screw rolling supporting linear feed system comprises a base, guide rail installation plates, rolling guide rails, wedge blocks, rolling guide rail sliding blocks, bearing seats, a bearing, a coupler, a ball screw pair, a nut seat, a motor, a working platform, a synchronization frame, synchronization rods, rubber rings, elastic ropes, a piezoelectricity accelerating speed sensor, an impedance head, a data collector, a charge amplifier, a power amplifier and a PC. Compared with the prior art, the device for testing the dynamic characteristics of a single-screw or double-screw rolling supporting linear feed system is compact in structure, wide in application range, clear in test philosophy, and capable of having the functions of testing the dynamic characteristics of the single-screw rolling supporting linear feed system and the double-screw rolling liner feed system, testing the influence of the screw span on the dynamic characteristics of the double-screw rolling linear feed system, and testing the influences of the guide rail span and the feed speed on the dynamic characteristics of the single-screw rolling supporting linear feed system and the double-screw rolling linear feed system.
Description
Technical field
The present invention relates to a kind of NC machine tool feed system dynamic characteristic test device and method of testing thereof, particularly a kind of single double lead-screw rolling support linear feeding system dynamic characteristic test device and method.
Background technology
With rolling support linear feeding system being most widely used on numerically-controlled machine that rolling guide and ball-screw are formed for primary drive parts, the quality of its performance is very outstanding on the impact of lathe overall performance, its dynamic perfromance has conclusive impact to the positioning precision of numerically-controlled machine, sensitivity and running stability, plays an important role to the reliability improving the crudy of lathe, efficiency and system.Dynamic characteristic test mainly tests out the modal parameter of system, for the optimal design of the Analysis of Vibration Characteristic of structural system, vibrating failure diagnosis and forecast and structural dynamic characteristic provides foundation.
Traditional numerically-controlled machine rolling support linear feeding system mainly adopts single ball-screw, along with lathe at a high speed, high-precision, heavily loaded and advance the High Level future development of synchronous control technique, the application with two ball-screws driving linear feeding systems of the advantages such as good vibration resistance, high system stiffness and rapid system response increases gradually.Domestic when designing Machine Tool Feeding System at present, using empirical method and analogy method as major design means, when determining that the single ball-screw of selection drives or two ball-screw drives and designs length and the span of guide rail and leading screw, most with reference to domestic and international lathe of the same type, lack real test basis.Therefore, Obtaining Accurate feed system dynamic characteristic parameter is of great significance the design of Machine Tool Feeding System and optimization tool.
Document 1: Chinese patent: rolling support linear feeding system static and dynamic performance proving installation and method of testing, number of patent application: 201310106101.2.Devise a kind of static and dynamic performance proving installation for single screw rolling support linear feeding system, this apparatus structure is compact, easy to operate, measuring accuracy is higher, have both the function of single screw feed system static and dynamic performance test, in static test, different loads condition can be tested and to place an order the normal direction of Feed System With Ball Screw, axis and side direction static characteristics; In dynamic perfromance, different guide rail span and speed of feed can be tested on the impact of the dynamic perfromance of single screw feed system.But this device cannot realize the measurement to double lead-screw feed system, the impact of leading screw span on double lead-screw feed system dynamic perfromance more cannot be measured; In guide rail span adjustment, this device devises web joint between rolling guide slide block and work, can be realized the adjustment of guide rail spacing by the mode of the link position adjusting guide rail slide block and web joint, but the spacing setting range of guide rail receives the constraint of web joint own dimensions.
As from the foregoing, at present, when testing Machine Tool Feeding System dynamic perfromance, there is no the device having both single screw feed system and double lead-screw feed system dynamic characteristic test, there is no the device that can realize the adjustment of double lead-screw span.
Summary of the invention
The object of the present invention is to provide a kind of single, double leading screw rolling bearing linear feeding system dynamic characteristic test device.This device has compact conformation, is widely used, test philosophy is clear, can test single screw feed system and double lead-screw feed system dynamic perfromance, the length can testing guide rail and leading screw, span and speed of feed to features such as the impacts of system dynamic characteristic simultaneously.
The technical solution realizing the object of the invention is: a kind of single, double leading screw rolling support linear feeding system dynamic characteristic test device, comprises base, guide rails assembling plate, rolling guide, rolling guide slide block, wedge, bearing seat, bearing, shaft coupling, ball screw assembly, nut seat, motor, worktable, synchronous frame, synchronous push rod, rubber ring, hanger bar, vibrator, elastic threads, piezoelectric acceleration transducer, reluctance head, data acquisition unit, charge amplifier, power amplifier and PC;
Horizontal and vertical being equipped with of base upper surface is parallel to each other and equally spaced T-slot, the longitudinal T-slot of upper surface outermost two of base is connected two rolling guides be parallel to each other, the bearing of trend of this rolling guide is longitudinally, every root rolling guide all arranges rolling guide slide block, above rolling guide slide block, synchronous frame is set, synchronous frame is arranged two hanger bar be parallel to each other, hanger bar place straight line parallels with rolling guide; The upper surface of base is connected two the guide rails assembling plate be parallel to each other simultaneously, and these two guide rails assembling plates are positioned at the inner side of two rolling guides being fixed on base upper surface, and described guide rails assembling plate parallels with two rolling guides being fixed on base upper surface;
Described guide rails assembling plate two side through hole is all connected with the horizontal T-slot of base upper surface by bolt, each guide rails assembling plate all arranges rolling guide, this rolling guide is pressed on guide rails assembling plate installed surface by wedge, rolling guide on guide rails assembling plate also all arranges rolling guide slide block, this rolling guide slide block is arranged the worktable having row bar shaped countersunk head groove, the countersunk head groove of described worktable is connected with rolling guide slide block mounting hole by bolt, the both sides of worktable arrange synchronous push rod, this synchronous push rod runs through the through hole of synchronous frame both sides, thus make worktable drive synchronous frame synchronizing moving, synchronous push rod overlaps with synchronous frame junction rubber ring,
At least one ball screw assembly, paralleled with it is set between two guide rails assembling plates, the two ends of ball screw assembly, are all connected with the bearing seat be connected on base plate by bearing, one end of this ball screw assembly, is connected with motor by shaft coupling, the middle part of ball screw assembly, is enclosed within nut seat, and this nut seat is fixed on below worktable bar shaped countersunk head groove;
Synchronous frame has hung vibrator by elastic threads, and the bottom of vibrator arranges reluctance head, is adsorbed on impacting point position bottom this reluctance head; Piezoelectric acceleration transducer is adsorbed in test point respectively by magnetic head;
The output terminal of piezoelectric acceleration transducer is all connected with the input end of charge amplifier with the force signal output terminal of reluctance head, charge amplifier output terminal is connected with data acquisition unit input end, the USB port of data acquisition unit is connected by USB data line with robot calculator, the input end of power amplifier is connected with the output terminal of data acquisition unit, and the output terminal of power amplifier is connected with the input end of vibrator.
Based on a method of testing for above-mentioned proving installation, kinetic measurement specifically comprises the following steps:
Steps A: test macro initialization, adjusts to duty by each proving installation;
Step B: install vibrator and reluctance head; When normal direction, side direction and axial excitation, respectively vibrator is hung in the top position of synchronous frame, lateral position and hanger bar; Reluctance head one end is connected with vibrator link bolt hole by stud, and the other end is adsorbed on impacting point position;
Step C: the connection of other proving installation; Piezoelectric acceleration transducer, charge amplifier, data acquisition unit, power amplifier and robot calculator are linked up with corresponding data line and forms whole test macro;
Step D: Geometric Modeling; According to the position of the actual geometric parameter of feed system and test point, set up point layout geometric model;
Step e: test parameter is arranged, and carries out corresponding optimum configurations, determine swept frequency range in robot calculator, charge amplifier enlargement factor, the electric current of power amplifier and voltage, acceleration transducer and reluctance head force snesor correction factor, average time, triggering mode;
Step F: start to measure, adopt single point excitation, three orientation measurements, piezoelectric acceleration transducer is placed according to point position, if certain direction of some point is not suitable for placing sensor, then replace with the response of the point similar to its vibration shape, food preservation test data;
Step G: test findings treatment and analyses, measures after terminating, carries out reliability and correctness is verified to test findings; Whether the investigation system vibration shape meets the verification of vibration shape correlation matrix, as met the demands, then this time measures effectively, food preservation test data, carry out next step and calculate, if the vibration shape does not meet the demands, then turn back to after steps A again changes measurement parameter, checks that each rig for testing is whether normal, again test.
Compared with prior art, its remarkable advantage is in the present invention: (1) proving installation compact conformation, applied range, and test philosophy is clear, easily obtains rolling support linear feeding system dynamic perfromance exactly; (2) this device has the function of the dynamic perfromance measuring single screw feed system and double lead-screw feed system simultaneously; (3) base upper surface is horizontal and vertical all devises equally spaced T-slot, can be configured ball-screw and the rolling guide of different length by the longitudinal pitch of adjustment diaxon bearing; (4) when measuring double lead-screw feed system, by the horizontal span between the two pairs of bearing seats in adjustment left and right, span between two leading screws can be measured on the impact of the dynamic perfromance of double lead-screw feed system; (5) devise bar shaped countersunk head groove on the table, can reach by the distance of the adjustment connected position of guide rail slide block and two guide rails assembling plates the object adjusting guide rail span, thus test guide rail span is on the impact of the dynamic perfromance of feed system.(6) by adjustment motor speed, can the dynamic perfromance of test table, thus response speed is on the impact of the dynamic perfromance of whole feed system.
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is single screw rolling support linear feeding system dynamic characteristic test equipments overall structure figure of the present invention.
Fig. 2 is double lead-screw rolling support linear feeding system dynamic characteristic test equipments overall structure figure of the present invention.
Fig. 3 is the three-view diagram of synchronizing linkage of the present invention, and figure (a) is front view, and figure (b) is left view, and figure (c) is vertical view.
Fig. 4 is double lead-screw rolling support linear feeding system dynamic characteristic test device cut-open view of the present invention.
Fig. 5 is that single, double leading screw rolling support linear feeding system dynamical property test system of the present invention connects block diagram.
Embodiment
A kind of single double lead-screw rolling support linear feeding system dynamic characteristic test device, comprises base 1, guide rails assembling plate 4, rolling guide 7, rolling guide slide block 8, wedge 5, bearing seat 3, bearing 12, shaft coupling 20, ball screw assembly, 19, nut seat 6, motor 2, worktable 18, synchronous frame 9, synchronous push rod 11, rubber ring 10, hanger bar 13, vibrator 14, elastic threads 15, piezoelectric acceleration transducer 17, reluctance head 16, data acquisition unit 22, charge amplifier 21, power amplifier 24 and PC 23;
Horizontal and vertical being equipped with of base 1 upper surface is parallel to each other and equally spaced T-slot, the longitudinal T-slot of upper surface outermost two of base 1 is connected two rolling guides be parallel to each other 7, the bearing of trend of this rolling guide 7 is longitudinally, every root rolling guide 7 all arranges rolling guide slide block 8, synchronous frame 9 is set above rolling guide slide block 8, synchronous frame 9 is arranged two hanger bar be parallel to each other 13, hanger bar 13 place straight line parallels with rolling guide 7; The upper surface of base 1 is connected two the guide rails assembling plate 4 be parallel to each other simultaneously, these two guide rails assembling plates 4 are positioned at the inner side of two rolling guides 7 being fixed on base 1 upper surface, and described guide rails assembling plate 4 parallels with two rolling guides 7 being fixed on base 1 upper surface;
Described guide rails assembling plate 4 liang of side through hole are all connected by the horizontal T-slot of bolt with base 1 upper surface, each guide rails assembling plate 4 all arranges rolling guide 7, this rolling guide 7 is pressed on guide rails assembling plate 4 installed surface by wedge 5, rolling guide 7 on guide rails assembling plate 4 also all arranges rolling guide slide block 8, this rolling guide slide block 8 is arranged the worktable 18 having 4 row bar shaped countersunk head grooves, the countersunk head groove of described worktable 18 is connected with rolling guide slide block 8 mounting hole by bolt, the both sides of worktable 18 arrange synchronous push rod 11, this synchronous push rod 11 runs through the through hole of synchronous frame 9 both sides, thus make worktable 18 drive synchronous frame 9 synchronizing moving, synchronous push rod 11 overlaps with synchronous frame 9 junction rubber ring 10, the impact of its axial rigidity can be eliminated during measurement,
At least one ball screw assembly, paralleled with it 19 is set between two guide rails assembling plates 4, the two ends of ball screw assembly, 19 are all connected with the bearing seat 3 be connected on base plate by bearing 12, one end of this ball screw assembly, 19 is connected with motor 2 by shaft coupling 20, the middle part of ball screw assembly, 19 is enclosed within nut seat 6, and this nut seat 6 is fixed on below worktable 18 bar shaped countersunk head groove;
Synchronous frame 9 has hung vibrator 14 by elastic threads 15, and the bottom of vibrator 14 arranges reluctance head 16, is adsorbed on impacting point position bottom this reluctance head 16; Piezoelectric acceleration transducer 17 is adsorbed in test point respectively by magnetic head;
The output terminal of piezoelectric acceleration transducer 17 is all connected with the input end a of charge amplifier 21 with the force signal output terminal of reluctance head 16, charge amplifier 21 output terminal b is connected with data acquisition unit 22 input end c, the USB port of data acquisition unit 22 is connected by USB data line with robot calculator 23, the input end e of power amplifier 24 is connected with the output terminal d of data acquisition unit 22, and the Ausgang of power amplifier 24 is connected with the input end of vibrator 14.
The quantity of ball screw assembly, 19 is one.The quantity of ball screw assembly, 19 also can be two, and these two ball screw assembly,s 19 are parallel to each other.
Have through hole bottom guide rails assembling plate 4, described through hole longitudinal pitch equals the spacing of T-slot; Have through hole bottom bearing seat 3, the horizontal spacing of described through hole is the T-slot spacing of 2 times, and longitudinal pitch equals T-slot spacing.
Worktable 18 is provided with four bar shaped countersunk head grooves be parallel to each other, and the spacing between countersunk head groove equals the spacing of rolling guide slide block 8 mounting hole, also equals the spacing of ball screw assembly, 19 nut seat 6 mounting hole.
Ball screw assembly, 19 length adjustment scope is 1000mm ~ 3000mm; The span scope of the rolling guide 7 on guide rails assembling plate 4 is 400mm ~ 1100mm.When the quantity of ball screw assembly, is two, two ball screw assembly, 19 span scope is 400mm ~ 1100mm.
Test point is arranged on base 1, worktable 18, ball screw assembly, 19, rolling guide 7, bearing seat 3 and motor 2.
Based on a method of testing for above-mentioned proving installation, kinetic measurement specifically comprises the following steps:
Steps A: test macro initialization, adjusts to duty by each proving installation;
Step B: install vibrator 14 and reluctance head 16; When normal direction, side direction and axial excitation, respectively vibrator 14 is hung in the top position of synchronous frame 9, lateral position and hanger bar 13; Reluctance head 16 one end is connected with vibrator 14 link bolt hole by stud, and the other end is adsorbed on impacting point position;
Step C: the connection of other proving installation; Piezoelectric acceleration transducer 17, charge amplifier 21, data acquisition unit 22, power amplifier 24 and robot calculator 23 are linked up with corresponding data line and forms whole test macro;
Step D: Geometric Modeling; According to the position of the actual geometric parameter of feed system and test point, set up point layout geometric model;
Step e: test parameter is arranged, and carries out corresponding optimum configurations, determine swept frequency range in robot calculator 23, charge amplifier 21 enlargement factor, the electric current of power amplifier 24 and voltage, acceleration transducer 14 and reluctance head 16 force snesor correction factor, average time, triggering mode;
Step F: start to measure, adopt single point excitation, three orientation measurements, piezoelectric acceleration transducer 17 is placed according to point position, if certain direction of some point is not suitable for placing sensor, then replace with the response of the point similar to its vibration shape, food preservation test data;
Step G: test findings treatment and analyses, measures after terminating, carries out reliability and correctness is verified to test findings; Whether the investigation system vibration shape meets the verification of vibration shape correlation matrix, as met the demands, then this time measures effectively, food preservation test data, carry out next step and calculate, if the vibration shape does not meet the demands, then turn back to after steps A again changes measurement parameter, checks that each rig for testing is whether normal, again test.
During dynamic test, adopt single point excitation, the method of testing of three direction pick-ups, vibrator 14 is suspended on synchronous frame 9 by elastic threads 15, reluctance head 16 is arranged on vibrator 14 connecting thread hole, impacting point generally selects worktable 18 each centers, uses piezoelectric acceleration transducer 17 pick-up, and sensor 17 is adsorbed in each test point that modeling in advance determines by magnetic head;
The force signal output terminal of above-mentioned reluctance head 16 is connected with the input end of charge amplifier 21 with piezoelectric acceleration transducer 17 output terminal, charge amplifier 21 output terminal is connected with data acquisition unit 22 input end, under normal circumstances by the force signal of reluctance head 16 access charge amplifier the 21st passage, and piezoelectric acceleration transducer 17 outputs signal accessible 2 ~ 10 passages, charge amplifier 21 is 4 passages, quantity is 3, and data acquisition unit 22 is 16 passages.The USB port of data acquisition unit 22 is connected by USB data line with robot calculator 23, the USB port of data acquisition unit 22 both can receive the signal of robot calculator 23, the Signal transmissions of collection can be processed to robot calculator 23 again, complete the interactive function of collection signal and operational order.The output port of data acquisition unit 22 is connected with the input end of power amplifier, the swept-frequency signal that robot calculator 23 sends can be transferred to power amplifier 24, power amplifier 24 is connected with the input end of vibrator 17, vibrator 17 can receive the swept-frequency signal from power amplifier 24, thus control vibrator 17 pairs of worktable 18 encourage.
Below in conjunction with Fig. 1 and Fig. 2, the implementation of the adjustment of the length of middle guide of the present invention and leading screw, guide rail span and leading screw span is described:
The adjustment of the length of guide rail 7 and leading screw 19, guide rail 7 span and leading screw 19 span realizes mainly through the size of reasonable disposition T-slot and each member mounting holes.Base 1 is of a size of 1900 × 3500 × 300mm
3, the horizontal and vertical of its upper surface all has the T-slot be parallel to each other, and the distance of adjacent two T-slot is 100mm; Worktable 18 is of a size of 500 × 1410 × 80mm
3, it is designed with four bar shaped countersunk head grooves be parallel to each other, countersunk head flute length is 1300mm, and the spacing between countersunk head groove is 100mm; The fore-and-aft distance of the rolling guide slide block 8 of feed system and the mounting hole of nut seat 6 is also 100mm, and they are connected with countersunk head groove by bolt.
Through hole longitudinal pitch bottom two guide rails assembling plates 4 is also 100mm, fixing rolling guide 7 on it.During installation, bolt is through the through hole bottom the T-slot of base 1 transverse direction and two guide rails assembling plates 4, thus two guide rails assembling plates 4 moving freely transversely can be realized, reach the object of adjustment guide rail 7 span, this device attainable guide rail 7 span scope is 400mm ~ 1100mm;
Diaxon bearing 3 bottom through-hole horizontal spacing is 200mm, during installation, bolt passes T-slot and diaxon bearing 3 bottom through-hole of base 1 longitudinal direction, thus the adjustment of diaxon bearing 3 fore-and-aft distance can be realized, reach the object of configuration different length ball-screw 19, it is 1000mm ~ 3000mm that this device can realize leading screw 19 length adjustment scope;
Diaxon bearing 3 bottom through-hole longitudinal pitch is 100mm, when testing double lead-screw 19 feed system, bolt passes T-slot and two pairs, left and right bearing seat 3 bottom through-hole of base 1 transverse direction, thus the adjustment of two pairs of horizontal spans of bearing seat 3 can be realized, reach the object of adjusting screw 19 span, this device attainable mariages 19 thick stick span scope is 400mm ~ 1100mm;
Below in conjunction with Fig. 1-3, the synchronization-moving implementation of dynamic test system and feed system in the present invention is described:
Dynamic test system realizes mainly through the synchronizing linkage be connected with worktable 18 in device with the synchronizing moving of feed system.Described synchronizing linkage are formed primarily of synchronous frame 9, hanger bar 13 and synchronous push rod 11.Synchronous push rod 11 is equipped with in worktable 18 both sides, and synchronous push rod 11 is through the through hole of synchronous frame 9 both sides.Synchronous frame 9 is hung with vibrator 14.Ball screw assembly, 19 is connected with worktable 18 by nut seat 6.When motor 2 starts, drive ball-screw 19 to rotate, leading screw 19 drives worktable 18 to move, and worktable 18 drives synchronous frame 9 by synchronous push rod 11, thus realizes synchronizing moving.To overlap with synchronous frame 9 junction at synchronous push rod 11 and have rubber ring 10, synchronous push rod 11 can be eliminated on the impact of axial rigidity.
Below in conjunction with Fig. 1 ~ 5, a kind of rolling linear feed system dynamic characteristic test method of the present invention is described, concrete steps are as follows:
Steps A: test macro initialization, adjusts to duty by each proving installation;
Step B: install vibrator 14 and reluctance head 16; When normal direction, side direction and axial excitation, respectively vibrator 14 is hung in the top of synchronous frame 9, side direction and hanger bar 13; Reluctance head 16 one end is connected with vibrator 14 link bolt hole by stud, and the other end is adsorbed on impacting point position;
Step C: the connection of other proving installation; Piezoelectric acceleration transducer 17, charge amplifier 21, data acquisition unit 22, power amplifier 24 and robot calculator 23 are linked up with corresponding data line and forms whole test macro;
Step D: Geometric Modeling; According to the position of the actual geometric parameter of feed system and test point, set up point layout geometric model; The selection of described test point should follow following principle: the identifiability condition of (1) warranty test mode, namely clearly shows feature and the difference of all Mode Shape in test frequency range; (2) test point should comprise all system points of test specimen; (3) miss mode for principle to reduce, be uniformly distributed test point; When testing the dynamic perfromance of whole feed system, each parts of system should arrange measuring point; When measuring speed affects feed system dynamic perfromance, only on worktable 31, arrange measuring point;
Step e: test parameter is arranged, and carries out corresponding optimum configurations, determine swept frequency range in robot calculator 23, charge amplifier 21 enlargement factor, the electric current of power amplifier 24 and voltage, acceleration transducer 17 and reluctance head 16 force snesor correction factor, average time, triggering mode;
Step F: start to measure, adopt single point excitation, three orientation measurements, piezoelectric acceleration transducer 17 is placed according to point position, if certain direction of some point is not suitable for placing sensor, then replace with the response of the point similar to its vibration shape, food preservation test data;
Step G: test findings treatment and analyses, measures after terminating, carries out reliability and correctness is verified to test findings; Whether the investigation system vibration shape meets the verification of vibration shape correlation matrix, as met the demands, then this time measures effectively, food preservation test data, carry out next step and calculate, if the vibration shape does not meet the demands, then turn back to after steps A again changes measurement parameter, checks that each rig for testing is whether normal, again test.
As from the foregoing, the present invention can measure single, double leading screw rolling support linear feeding system dynamic perfromance well.
Claims (9)
1. a single double lead-screw rolling support linear feeding system dynamic characteristic test device, it is characterized in that, comprise base [1], guide rails assembling plate [4], rolling guide, rolling guide slide block [8], wedge [5], bearing seat [3], bearing [12], shaft coupling [20], ball screw assembly, [19], nut seat [6], motor [2], worktable [18], synchronous frame [9], synchronous push rod [11], rubber ring [10], hanger bar [13], vibrator [14], elastic threads [15], piezoelectric acceleration transducer [17], reluctance head [16], data acquisition unit [22], charge amplifier [21], power amplifier [24] and robot calculator [23],
Horizontal and vertical being equipped with of base [1] upper surface is parallel to each other and equally spaced T-slot, the longitudinal T-slot of upper surface outermost two of base [1] is connected two rolling guides be parallel to each other, the bearing of trend of the rolling guide of base [1] upper surface is longitudinally, every root rolling guide is all arranged rolling guide slide block [8], rolling guide slide block [8] top arranges synchronous frame [9], synchronous frame [9] is arranged two hanger bar be parallel to each other [13], hanger bar [13] place straight line parallels with rolling guide; The upper surface of base [1] is connected two the guide rails assembling plate [4] be parallel to each other simultaneously, these two guide rails assembling plates [4] are positioned at the inner side of two rolling guides being fixed on base [1] upper surface, and described guide rails assembling plate [4] parallels with two rolling guides being fixed on base [1] upper surface;
Described guide rails assembling plate [4] two side through hole is all connected by the horizontal T-slot of bolt with base [1] upper surface, each guide rails assembling plate [4] all arranges rolling guide, rolling guide on guide rails assembling plate [4] is pressed on guide rails assembling plate [4] installed surface by wedge [5], rolling guide on guide rails assembling plate [4] also all arranges rolling guide slide block [8], this rolling guide slide block [8] is upper arranges the worktable [18] having 4 row bar shaped countersunk head grooves, the countersunk head groove of described worktable [18] is connected with rolling guide slide block [8] mounting hole by bolt, the both sides of worktable [18] arrange synchronous push rod [11], this synchronous push rod [11] runs through the through hole of synchronous frame [9] both sides, thus make worktable [18] drive synchronous frame [9] synchronizing moving, synchronous push rod [11] overlaps with synchronous frame [9] junction rubber ring [10],
At least one ball screw assembly, paralleled with it [19] is set between two guide rails assembling plates [4], the two ends of ball screw assembly, [19] are all connected with the bearing seat be connected on base plate [3] by bearing [12], one end of this ball screw assembly, [19] is connected with motor [2] by shaft coupling [20], the middle part of ball screw assembly, [19] is enclosed within nut seat [6], and this nut seat [6] is fixed on below worktable [18] bar shaped countersunk head groove;
Synchronous frame [9] has hung vibrator [14] by elastic threads [15], and the bottom of vibrator [14] arranges reluctance head [16], and this reluctance head [16] bottom is adsorbed on impacting point position; Piezoelectric acceleration transducer [17] is adsorbed in test point respectively by magnetic head;
The output terminal of piezoelectric acceleration transducer [17] is all connected with the input end [a] of charge amplifier [21] with the force signal output terminal of reluctance head [16], charge amplifier [21] output terminal [b] is connected with data acquisition unit [22] input end [c], the USB port of data acquisition unit [22] is connected by USB data line with robot calculator [23], the input end [e] of power amplifier [24] is connected with the output terminal [d] of data acquisition unit [22], the output terminal [f] of power amplifier [24] is connected with the input end of vibrator [14].
2. single double lead-screw rolling support linear feeding system dynamic characteristic test device according to claim 1, it is characterized in that, the quantity of ball screw assembly, [19] is one.
3. single double lead-screw rolling support linear feeding system dynamic characteristic test device according to claim 1, it is characterized in that, the quantity of ball screw assembly, [19] is two, and these two ball screw assembly,s [19] are parallel to each other.
4. single double lead-screw rolling support linear feeding system dynamic characteristic test device according to claim 1, is characterized in that, guide rails assembling plate [4] bottom has through hole, and described through hole longitudinal pitch equals the spacing of T-slot; Bearing seat [3] bottom has through hole, and the horizontal spacing of described through hole is the T-slot spacing of 2 times, and longitudinal pitch equals T-slot spacing.
5. single double lead-screw rolling support linear feeding system dynamic characteristic test device according to claim 1, it is characterized in that, worktable [18] is provided with four bar shaped countersunk head grooves be parallel to each other, spacing between countersunk head groove equals the longitudinal pitch of rolling guide slide block [8] mounting hole, also equals the longitudinal pitch of ball screw assembly, [19] nut seat [6] mounting hole.
6. the single double lead-screw rolling support linear feeding system dynamic characteristic test device according to claim 1,2,4 or 5, it is characterized in that, ball screw assembly, [19] length adjustment scope is 1000mm ~ 3000mm; The span scope of the rolling guide on guide rails assembling plate [4] is 400mm ~ 1100mm.
7. single double lead-screw rolling support linear feeding system dynamic characteristic test device according to claim 3, it is characterized in that, ball screw assembly, [19] length adjustment scope is 1000mm ~ 3000mm; The span scope of the rolling guide on guide rails assembling plate [4] is 400mm ~ 1100mm, and two ball screw assembly, [19] span scope is 400mm ~ 1100mm.
8. single double lead-screw rolling support linear feeding system dynamic characteristic test device according to claim 1, it is characterized in that, test point is arranged on base [1], worktable [18], ball screw assembly, [19], rolling guide, bearing seat [3] and motor [2].
9. based on a method of testing for proving installation described in claim 1, it is characterized in that, kinetic measurement specifically comprises the following steps:
Steps A: test macro initialization, adjusts to duty by each proving installation;
Step B: install vibrator [14] and reluctance head [16]; When normal direction, side direction and axial excitation, respectively vibrator [14] is hung in the top position of synchronous frame [9], lateral position and hanger bar [13]; Reluctance head [16] one end is connected with vibrator [14] link bolt hole by stud, and the other end is adsorbed on impacting point position;
Step C: the connection of other proving installation; Piezoelectric acceleration transducer [17], charge amplifier [21], data acquisition unit [22], power amplifier [24] and robot calculator [23] are linked up with corresponding data line and forms whole test macro;
Step D: Geometric Modeling; According to the position of the actual geometric parameter of feed system and test point, set up point layout geometric model;
Step e: test parameter is arranged, corresponding optimum configurations is carried out in robot calculator [23], determine swept frequency range, charge amplifier [21] enlargement factor, the electric current of power amplifier [24] and voltage, acceleration transducer [14] and reluctance head [16] force snesor correction factor, average time, triggering mode;
Step F: start to measure, adopt single point excitation, three orientation measurements, piezoelectric acceleration transducer [17] is placed according to point position, if certain direction of some point is not suitable for placing sensor, then replace with the response of the point similar to its vibration shape, food preservation test data;
Step G: test findings treatment and analyses, measures after terminating, carries out reliability and correctness is verified to test findings; Whether the investigation system vibration shape meets the verification of vibration shape correlation matrix, as met the demands, then this time measures effectively, food preservation test data, carry out next step and calculate, if the vibration shape does not meet the demands, then turn back to after steps A again changes measurement parameter, checks that each rig for testing is whether normal, again test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310199114.9A CN103323233B (en) | 2013-05-24 | 2013-05-24 | Device and method for testing dynamic characteristics of single-screw or double-screw rolling supporting linear feed system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310199114.9A CN103323233B (en) | 2013-05-24 | 2013-05-24 | Device and method for testing dynamic characteristics of single-screw or double-screw rolling supporting linear feed system |
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| Publication Number | Publication Date |
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| CN103323233A CN103323233A (en) | 2013-09-25 |
| CN103323233B true CN103323233B (en) | 2015-07-22 |
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| CN201310199114.9A Expired - Fee Related CN103323233B (en) | 2013-05-24 | 2013-05-24 | Device and method for testing dynamic characteristics of single-screw or double-screw rolling supporting linear feed system |
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| CN103913284A (en) * | 2014-04-16 | 2014-07-09 | 南京理工大学 | Double drive separating rolling skid composite guide rail dynamic characteristic test experiment device and method |
| CN103900778A (en) * | 2014-04-16 | 2014-07-02 | 南京理工大学 | Device and method for dynamic characteristic testing experiment of double-drive sliding block type rolling and sliding composite guide rail |
| CN104122087A (en) * | 2014-08-15 | 2014-10-29 | 上海理工大学 | Ball screw performance experiment table driven by linear motor |
| CN106768738B (en) * | 2016-11-22 | 2018-12-14 | 东南大学 | It is a kind of for hanging the suspension arrangement and application method of vibration excitor |
| CN110132583B (en) * | 2019-05-23 | 2021-01-29 | 内蒙古科技大学 | Linear rolling guide rail rolling pair motion state detection device and detection method thereof |
| CN110108484B (en) * | 2019-05-23 | 2021-01-29 | 内蒙古科技大学 | Device and method for detecting motion state of ball screw rolling pair |
| CN111515755B (en) * | 2020-04-08 | 2021-06-01 | 江苏大学 | Guide rail performance test system |
| CN111521391A (en) * | 2020-05-06 | 2020-08-11 | 北京工业大学 | Ball screw pair thermal deformation and dynamic characteristic testing device |
| CN114947442B (en) * | 2021-02-24 | 2024-04-09 | 顾家家居股份有限公司 | Intelligent sofa control method and intelligent sofa |
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