CN104198204B - Straight feed unit comprehensive performance degradation testbed capable of simulating actual working conditions - Google Patents
Straight feed unit comprehensive performance degradation testbed capable of simulating actual working conditions Download PDFInfo
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- CN104198204B CN104198204B CN201410438959.3A CN201410438959A CN104198204B CN 104198204 B CN104198204 B CN 104198204B CN 201410438959 A CN201410438959 A CN 201410438959A CN 104198204 B CN104198204 B CN 104198204B
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- workbench
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Abstract
The invention discloses a straight feed unit comprehensive performance degradation testbed capable of simulating actual working conditions. The testbed is used for studying the influence of the accuracy degradation and the rigidity degradation of a ball screw pair and a linear guide rail pair on the comprehensive performance degradation of a worktable. Cylinders in three directions are used for loading on the worktable, respectively, and therefore, the actual movement process of the worktable of a machine can be simulated. Besides, the working conditions of the experimental device are closer to the actual working conditions. A torque sensor is connected between a lead screw and a servo motor. A three-direction force sensor is mounted between a lead screw nut and the worktable and capable of measuring the frictional force of the linear guide rail pair. A round grating scale is mounted inside a servo motor; pneumatic control is matched with the control of the servo motor so that the loading abrasion operation of the testbed can be realized; an accelerated degradation manner is adopted in the test process, and meanwhile, the influence of a plurality of factors on the performance of the worktable is taken into account.
Description
Technical field
The present invention relates to a kind of linear feed unit combination property degradation experiment platform for simulating actual condition, belong to numerical control machine
Bed manufacture and detection technique field.
Background technology
Patent of the present invention proposes that three directions are carried out to linear feed unit using cylinder loads and use accelerated degradation test
Principle design degradation experiment platform, and multiple sensors are set in kinematic pair junction, for detecting various parameters data.Research rolling
The influence that ballscrew is secondary and linear motion pair is to workbench combination property.Ball screw assembly, and line slideway auxiliary are that Digit Control Machine Tool enters
To the major moving part of system, its precision determines the precision of numerically controlled machine.In order to improve ball under actual condition
The rigidity of lead screw pair and line slideway auxiliary, the method frequently with the pretightning force for increasing ball screw assembly, and line slideway auxiliary improves firm
Degree.After feed unit is using a period of time, with the operation repeatedly of ball screw assembly, and line slideway auxiliary, rolling element and raceway rub
Scouring is damaged can cause pretightning force to be lost, and the pretightning force decline of kinematic pair, kinematic pair produce Form and position error, cause linear feed unit
How precise decreasing, accurately learn that the mechanism of precise decreasing becomes problem.The transmission of ball screw assembly, and line slideway auxiliary
Precision is relevant with several factors, for example moment of friction, pretightning force, load mode, motion mode, contact angle etc..Domestic ball wire
Thick stick is secondary have been done to ball screw assembly, and line slideway auxiliary and has much ground with line slideway auxiliary manufacturing enterprise and correlative study unit
Study carefully, but still be unable to the degenerative process of combination property between accurate description workbench and guide rail.Consider pretightning force and moment of friction
The degeneration of workbench combination property is studied and is modeled also rare research Deng many factors.
The content of the invention
The present invention relates to a kind of linear feed unit combination property degradation experiment platform for simulating actual condition, rolled for studying
The influence that the precision of ballscrew and line slideway is degenerated to workbench combination property.
The technical solution adopted in the present invention is a kind of linear feed unit combination property degeneration examination for simulating actual condition
Platform is tested, the test bench includes testing stand base 1, leading screw servomotor 2, connects bearing 3, straight-line rolling guide set 4, ball
Lead screw pair 5, workbench 6, axial cylinder loading blocks 7, double cylinder pistons 8, vertical cylinder loading roller 9, portal frame 10, vertical gas
Cylinder 11, axially double cylinders 12, lateral loading cylinder 13, lateral cylinder loading roller 14, torque sensor 15, linear grating chi
16th, three direction force snesor 17；The test bench uses three direction cylinder load modes, simulates the work shape of true milling machine
State.
Leading screw servomotor 2 is connected with ball screw assembly, 5 by connects bearing 3, and in connects bearing 3 and ball screw assembly,
5 junction is provided with torque sensor 15, and leading screw servomotor 2 is connected with ball screw assembly, 5 by shaft coupling and drives work
Making platform 6 carries out reciprocating action；Straight-line rolling guide set 4 is fixed on testing stand base 1；Portal frame 10 is fixedly mounted on testing stand
The both sides of base 1；Axial cylinder loading blocks 7 are fixed on the axial location of workbench 6；It is provided between workbench 6 and testing stand base 1
Linear grating chi 16, the dynamic chi of linear grating chi 16 is arranged on the bottom of workbench 6, and the scale of linear grating chi 16 is arranged on straight line
The side of rolling guide-rail pairs 4, it is parallel with straight-line rolling guide set 4.
Vertical loading cylinder 11 is arranged on the top of portal frame 10, and Vertical loading cylinder 11 loads roller 9 by vertical cylinder
Vertical direction loading is carried out to workbench 6, is to be in rolling contact between vertical cylinder loading roller 9 and workbench 6.
Lateral loading cylinder 13 is arranged on the side of portal frame 10, and lateral loading cylinder 13 loads roller 14 by lateral cylinder
Workbench 6 is laterally loaded, is to be in rolling contact between lateral cylinder loading roller 14 and workbench 6.
Axially double cylinders 12 are arranged on portal frame 10, axially the double cylinder pistons 8 and ball screw assembly, 5 on double cylinders 12
Parallel, double cylinder pistons 8 can be in contact with axial cylinder loading blocks 7, workbench 6 be carried out axially loaded；Axial cylinder piston 8
Buffer rubber gasket is provided between axial cylinder loading blocks 7.
Compared with prior art, beneficial effects of the present invention are as follows.
1) testing stand of the present invention carries out three directions loadings to workbench using cylinder, realizes simulated machine tool workbench reality
Border motion process.Experimental provision is closer to actual condition.Consider the wear error of ball screw assembly, and line slideway auxiliary, will
The influence that pretightning force and moment of friction are degenerated to precision is considered in the middle of modeling, and uses heavily loaded accelerated degradation test.
2) testing stand of the present invention realizes loading force high using big stream overflow valve with pressure regulator valve, and controls cylinder and servomotor
Coordinate and complete load test.
3) testing stand of the present invention sets multiple sensors to detect the parameter of needs between driving-chain.Consider that precision is degenerated
Factor it is more than ever before.Workbench is measured using real-time monitoring mode.Servomotor can realize list with pneumatically loading
Journey loading, reciprocal loading, the various ways such as one direction loading and multi-direction loading are simulated to operating mode.
Brief description of the drawings
Fig. 1 is the general structure schematic diagram of apparatus of the present invention.
Fig. 2 is apparatus of the present invention left view.
Fig. 3 is apparatus of the present invention top view.
In figure：1st, testing stand base, 2, leading screw servomotor, 3, connects bearing, 4, straight-line rolling guide set, 5, ball wire
Thick stick pair, 6, workbench, 7, axial cylinder loading blocks, 8, double cylinder pistons, 9, vertical cylinder loading roller, 10, portal frame, 11,
Vertical cylinder, 12, axial double cylinders, 13, laterally load cylinder, 14, lateral cylinder loading roller, 15, torque sensor, 16,
Linear grating chi, 17, three direction force snesors.
Specific embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
As Figure 1-3, a kind of linear feed unit combination property degradation experiment platform for simulating actual condition, the experiment work
Include as platform, testing stand base 1, leading screw servomotor 2, connects bearing 3, straight-line rolling guide set 4, ball screw assembly, 5, work
Platform 6, axial cylinder loading blocks 7, double cylinder pistons 8, vertical cylinder loading roller 9, portal frame 10, vertical cylinder 11, axial direction are double
Cylinder 12, lateral loading cylinder 13, lateral cylinder loading roller 14, torque sensor 15, linear grating chi 16, three direction force are passed
Sensor 17；The test bench uses three direction cylinder load modes, simulates the working condition of true milling machine.
Leading screw servomotor 2 is connected with ball screw assembly, 5 by connects bearing 3, and in connects bearing 3 and ball screw assembly,
5 junction is provided with torque sensor 15, and leading screw servomotor 2 is connected with ball screw assembly, 5 by shaft coupling and drives work
Making platform 6 carries out reciprocating action；Straight-line rolling guide set 4 is fixed on testing stand base 1；Portal frame 10 is fixedly mounted on testing stand
The both sides of base 1；Axial cylinder loading blocks 7 are fixed on the axial location of workbench 6；Pacify between workbench 6 and straight-line rolling guide set 4
Equipped with linear grating chi 16, the dynamic chi of linear grating chi 16 is arranged on the bottom of workbench 6, and the scale of linear grating chi 16 is arranged on
The side of straight-line rolling guide set 4, it is parallel with straight-line rolling guide set 4.
Vertical loading cylinder 11 is arranged on the top of portal frame 10, and Vertical loading cylinder 11 loads roller 9 by vertical cylinder
Vertical direction loading is carried out to workbench 6, is to be in rolling contact between vertical cylinder loading roller 9 and workbench 6.
Lateral loading cylinder 13 is arranged on the sidepiece of portal frame 10, and lateral loading cylinder 13 loads roller 14 by lateral cylinder
Workbench 6 is laterally loaded, is to be in rolling contact between lateral loading cylinder loading roller 14 and workbench 6.
Axially double cylinders 12 are arranged on portal frame 10, double cylinder pistons 8 and ball-screw axially plus on double cylinders 12
Secondary 5 is parallel, and double cylinder pistons 8 can be in contact with axial cylinder loading blocks 7, workbench 6 be carried out axially loaded；Axial cylinder is lived
Buffer rubber gasket is provided between plug 8 and axial cylinder loading blocks 7.
Workbench uses three directions to load to simulate feed unit actual condition.Loading force is loaded higher than actual condition, is examined
Consider two kinds of way of degeneration, first, precision is carried out using at the uniform velocity top load way of degeneration degenerate experiment, second, added using workbench
Running slowly carries out precision degeneration experiment, and the data obtained by sensor in accelerated degradation test set up accuracy prediction model,
Prediction work platform combination property degradation mechanism.
Three cylinders in direction are exported using constant pressure, and output pressure is adjustable by pressure regulator valve.It is bigger in order to obtain
Loading force, axial cylinder is equipped with choke valve parallel connection check valve, is conveniently adjusted pair gas using double cylinders, total loop and a point loop
Cylinder is synchronous operation.
The data of this testing stand measurement include：The total load moment of torsion of workbench 6, is measured by torque sensor 15.Ball wire
Moment of friction between thick stick secondary 5 and workbench 6, by double nut, mechanism measures.The straight-line displacement of workbench 6, by linear grating
Chi 16 is measured.Grating scale is encoded using absolute encoding or relative type motor.The angular displacement of leading screw servomotor 2, is watched by leading screw
The built-in Circular gratings for taking motor are measured.The output pressure of three direction cylinders, is measured by the pressure gauge of the pressure regulator valve of pneumatic system.Work
Make total frictional force suffered by platform 6, measured by three direction force snesors 17.
Embodiment
Testing stand of the present invention uses three direction cylinder load modes, simulates the working condition of true milling machine, ball
Lead screw pair (has applied for patent of invention, application number using double nuts structure：201410067042.7), under load test state, rolling
Ballscrew secondary 5 drives workbench 6 to move back and forth by mother nut, and secondary nut measures the frictional force of ball screw assembly, by dynamometer link
Square；Axial cylinder is loaded to workbench simultaneously using two groups of symmetrical cylinders.
The operating procedure of the test bench is as follows,
Step 1：Vertical loading cylinder 11 is arranged on portal frame 10 workbench 6 is added by vertical cylinder loading roller 9
Carry, be to be in rolling contact between vertical cylinder loading roller 9 and workbench 6；Lateral loading cylinder 13 is arranged on the sidepiece of portal frame 10,
Lateral loading cylinder 13 loads roller 14 and workbench 6 is laterally loaded by lateral cylinder, and lateral cylinder loads roller 14
It is to be in rolling contact between workbench 6；Axially double cylinders 12 are arranged on portal frame 10, and axially the double cylinders on double cylinders 12 are lived
Plug 8 is parallel with ball screw assembly, 5, and double cylinder pistons 8 are carried out axially loaded by axial cylinder loading blocks 7 to workbench 6.
Step 2：Three direction force snesors and torque sensor are installed between the nut seat of workbench 6 and ball screw assembly, 5,
Three direction force snesors are bulk, and upper surface is directly connected with workbench 6, lower surface directly with the mother nut of ball screw assembly, 5 seat
Connection.Frictional force for measuring rolling guide-rail pairs.Torque sensor 15 is arranged between workbench 6 and secondary nut, and moment of torsion is passed
The side of sensor 6 keeps secondary nut seat upper surface parallel with table plane.The device is used to measure the friction of ball screw assembly,
Torque.
Step 3：Linear grating chi 16 is installed between workbench 6 and testing stand base 1, is moved chi and is arranged on workbench bottom
Portion, scale is arranged on rail-sides, with guide rail parallel.Connected using torque sensor 15 between ball-screw and servomotor, power
Square sensor both sides are installed shaft coupling and connect servomotor and ball-screw respectively, and servomotor afterbody is coaxially installed with round light
Grid.
Step 4：Experiment is loaded using three direction cylinders using way of degeneration is accelerated to workbench, simulates straight line
Feed unit actual condition, the air pressure of each cylinder is by pneumatic system control, and axially two cylinders of double cylinders 12 pass through
Choke valve is adjusted to synchronous operation mode.
Claims (4)
1. it is a kind of simulate actual condition linear feed unit combination property degradation experiment platform, it is characterised in that：The testing stand bag
Include testing stand base (1), leading screw servomotor (2), connects bearing (3), straight-line rolling guide set (4), ball screw assembly, (5),
Workbench (6), axial cylinder loading blocks (7), double cylinder pistons (8), vertical cylinder load roller (9), portal frame (10), vertical
Loading cylinder (11), axially double cylinders (12), laterally loading cylinder (13), lateral cylinder load roller (14), torque sensor
(15), linear grating chi (16), three direction force snesors (17)；The testing stand uses three direction cylinder load modes, and simulation is true
The working condition of real milling machine；
Leading screw servomotor (2) is connected with ball screw assembly, (5) by connects bearing (3), and in connects bearing (3) and ball wire
The junction of thick stick pair (5) is provided with torque sensor (15), and leading screw servomotor (2) is by shaft coupling and ball screw assembly, (5)
Connecting and drive workbench (6) carries out reciprocating action；Straight-line rolling guide set (4) is fixed on testing stand base (1)；Portal frame
(10) testing stand base (1) both sides are fixedly mounted on；Axial cylinder loading blocks (7) are fixed on workbench (6) axial location；Work
Linear grating chi (16) is installed, the dynamic chi of linear grating chi (16) is arranged on workbench between platform (6) and testing stand base (1)
(6) bottom, the scale of linear grating chi (16) is arranged on linear rolling track (4) side, flat with straight-line rolling guide set (4)
OK；
Vertical loading cylinder (11) loads roller installed in portal frame (10) top, Vertical loading cylinder (11) by vertical cylinder
(9) vertical direction loading is carried out to workbench (6), vertical cylinder is loaded between roller (9) and workbench (6) to be in rolling contact；
Lateral loading cylinder (13) laterally loads cylinder (13) and loads roller by lateral cylinder installed in portal frame (10) side
(14) workbench (6) is laterally loaded, lateral cylinder is loaded between roller (14) and workbench (6) to be in rolling contact；
Axially double cylinders (12) are on portal frame (10), axially the double cylinder pistons (8) and ball wire on double cylinders (12)
Thick stick pair (5) is parallel, and double cylinder pistons (8) can be in contact with axial cylinder loading blocks (7), workbench (6) be carried out axially loaded；
Buffer rubber gasket is provided between axial cylinder piston (8) and axial cylinder loading blocks (7).
2. it is according to claim 1 simulation actual condition linear feed unit combination property degradation experiment platform, its feature
It is：Testing stand uses three directions to load to simulate feed unit actual condition；Loading force is loaded higher than actual condition, it is considered to two
Kind of way of degeneration, first, precision is carried out using at the uniform velocity top load way of degeneration degenerate experiment, second, using testing stand acceleration and deceleration
Operation carries out precision degeneration experiment, and the data obtained by sensor in accelerated degradation test are set up accuracy prediction model, predicted
Testing stand combination property degradation mechanism.
3. it is according to claim 1 simulation actual condition linear feed unit combination property degradation experiment platform, its feature
It is：Three cylinders in direction are exported using constant pressure, and output pressure is adjustable by pressure regulator valve；In order to obtain bigger adding
Power is carried, axial cylinder is equipped with choke valve parallel connection check valve using double cylinders, total loop and a point loop, and being conveniently adjusted double cylinders is
Synchronous operation.
4. it is according to claim 1 simulation actual condition linear feed unit combination property degradation experiment platform, its feature
It is：The testing stand measurement data includes that workbench (6) total load moment of torsion is measured by torque sensor (15)；Ball-screw
Moment of friction between secondary (5) and workbench (6), by double nut, mechanism measures；Workbench (6) straight-line displacement, by straight line
Grating scale (16) is measured；Grating scale is encoded using absolute encoding or relative type motor；The angular displacement of leading screw servomotor (2), leads to
The built-in Circular gratings for crossing leading screw servomotor are measured；The output pressure of three direction cylinders, by the pressure of the pressure regulator valve of pneumatic system
Table is measured；Total frictional force suffered by workbench (6), is measured by three direction force snesors (17).
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| CN201410438959.3A CN104198204B (en) | 2014-08-30 | 2014-08-30 | Straight feed unit comprehensive performance degradation testbed capable of simulating actual working conditions |
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| CN201410438959.3A CN104198204B (en) | 2014-08-30 | 2014-08-30 | Straight feed unit comprehensive performance degradation testbed capable of simulating actual working conditions |
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| CN104198204B true CN104198204B (en) | 2017-05-24 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104535355B (en) * | 2015-01-15 | 2016-08-17 | 吉林大学 | Heavy type numerical control plane milling and boring machine table feed system reliability test bench |
| CN106289768A (en) * | 2016-09-20 | 2017-01-04 | 山东博特精工股份有限公司 | Leading screw, guide rail application system simulated condition laboratory table |
| TWI607830B (en) * | 2016-11-15 | 2017-12-11 | 財團法人工業技術研究院 | Machine tool feed device design system and method thereof |
| CN107860672B (en) * | 2017-10-29 | 2019-11-15 | 北京工业大学 | Numerically-controlled machine tool combines linear feed unit wear law experimental rig |
| CN108000236B (en) * | 2018-01-08 | 2020-11-27 | 内蒙古科技大学 | Device for detecting accelerated wear degradation rule of machine tool linear guide rail pair |
| CN108490878B (en) * | 2018-03-17 | 2020-08-28 | 北京工业大学 | Abrasion rule test method for combined linear feeding unit of numerical control machine tool |
| CN108555322B (en) * | 2018-03-27 | 2020-02-18 | 南京航空航天大学 | Lathe feeding system comprehensive performance test experimental method |
| CN108645616A (en) * | 2018-06-26 | 2018-10-12 | 北京工业大学 | The random abrasion test method of ball screw assembly, based on preload with feeding rotating speed |
| CN109186984B (en) * | 2018-09-30 | 2023-06-23 | 滨州学院 | Coaxial positioning device for nozzle and oil duct |
| CN110608911A (en) * | 2019-09-29 | 2019-12-24 | 科德数控股份有限公司 | Five-axis machine tool loading test device and method |
| CN110842644B (en) * | 2019-11-09 | 2021-02-02 | 北京工业大学 | Method for monitoring contact stiffness degradation rate of machine tool moving part based on numerical control load information |
| CN111515755B (en) * | 2020-04-08 | 2021-06-01 | 江苏大学 | Guide rail performance test system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202676449U (en) * | 2012-06-12 | 2013-01-16 | 西南交通大学 | Load controllable passive type servo-actuated force application linear guide rail pair test device |
| CN103909292A (en) * | 2014-01-02 | 2014-07-09 | 一拖(洛阳)开创装备科技有限公司 | Boring rod inserting device for combined machine tool |
-
2014
- 2014-08-30 CN CN201410438959.3A patent/CN104198204B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202676449U (en) * | 2012-06-12 | 2013-01-16 | 西南交通大学 | Load controllable passive type servo-actuated force application linear guide rail pair test device |
| CN103909292A (en) * | 2014-01-02 | 2014-07-09 | 一拖(洛阳)开创装备科技有限公司 | Boring rod inserting device for combined machine tool |
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