CN102022966B - Measurement method and device of guide rail, screw rod and nut seat comprehensive assembly accuracy of numerical control machine - Google Patents
Measurement method and device of guide rail, screw rod and nut seat comprehensive assembly accuracy of numerical control machine Download PDFInfo
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- CN102022966B CN102022966B CN201010506612XA CN201010506612A CN102022966B CN 102022966 B CN102022966 B CN 102022966B CN 201010506612X A CN201010506612X A CN 201010506612XA CN 201010506612 A CN201010506612 A CN 201010506612A CN 102022966 B CN102022966 B CN 102022966B
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- nut seat
- guide rail
- assembly precision
- numerical control
- screw rod
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Abstract
The invention relates to measurement equipment, in particular to measurement method and device of the comprehensive assembly accuracy for a numerical control machine. In the measurement method, a screw rod is driven by a servo motor to drive a workbench to move, workbench position variable quantity is collected in real time through a fixed time interval in the process, and comprehensive assembly accuracy of the screw rod and a guide rail isreflected through the position variable quantity and a drive moment value. The measurement device comprises a measured screw rod, a measured guide rail, a measured nut seat, the servo motor which is connected with the measured screw rod and a control system of the servo motor, wherein the control system comprises a motor drive module, a data collection module, a data analysis module and a database module. The measurement system and the measurement method are particularly suitable for measuring the comprehensive assembly accuracy of the guide rail, the screw rod and the nut seat of a large-scale numerical control machine with a thick screw rod and have the advantages of strong universality and high accuracy; and the system can be the control system of the numerical control machine, is beneficial to cost saving and enhances the working efficiency.
Description
Technical field
The present invention relates to a kind of measuring equipment, be meant that specifically a kind of numerically-controlled machine is with comprehensive assembly precision measurement mechanism and measuring method thereof.
Background technology
The comprehensive installation accuracy measuring method of screw mandrel, guide rail and the nut seat (worktable) on the printed wiring board numerically-controlled machine generally is at present: after whole assembling is accomplished; Through push work platform before and after artificial; The elasticity of each position in the sensation pushing course, the numerical value that cooperates clock gauge to show is again evaluated the comprehensive assembly precision of guide rail, screw mandrel and nut seat.This metering system is for junior machine, and because of its screw mandrel diameter is little, the assembling back is artificial to promote easily; So can satisfy the precision measure requirement basically; But this mode is impracticable for heavy duty machine tools, because screw mandrel is thick, worktable is heavy, manual work pushes away motionless causing and can't measure; Even elasticity is not felt in promotion yet reluctantly, the restriction of adding the clock gauge measuring position makes it can't accurately reflect data measured.Therefore, be necessary to design a kind of measuring method and measurement mechanism that is applicable to large-scale crin bar numerical control machine slide rail, the comprehensive assembly precision of screw mandrel and nut seat assembling back.
Summary of the invention
Problem to be solved by this invention provides a kind of highly versatile, precision is high and be specially adapted to large-scale crin bar numerical control machine slide rail, screw mandrel and nut seat assembling the back comprehensively measuring method and the measurement mechanism of assembly precision.
For solving the problems of the technologies described above, the technical scheme that the present invention takes is: provide a kind of numerical control machine slide rail feed screw nut seat comprehensive assembly precision measuring method, step is:
(1) controls a servomotor by servo-drive system and pass through the torsion of torque mode, leading screw rotation and drive nut seat, worktable are moved forward and backward to the different sizes of numerically-controlled machine leading screw transmission;
(2) move forward and backward the variation of each stage moment values in the process by servo-drive system record nut seat, worktable; And every at a distance from the real-time collecting work platform of Fixed Time Interval location variation, change and the variable quantity calculating screw mandrel of operating position and the comprehensive assembly precision of guide rail through moment values.
Concrete, the described torque mode of step (1) is that servo-driver is operated in torque mode and motion control card is operated in open loop mode.Torque mode is meant the accurately size of the drive motor output drive strength of Control Shaft, and open loop mode is a kind of working method of motion control card, and drive system is only exported a given magnitude of voltage, does not set up corresponding relation with the state of input automatically.
Preferably, the said servo-drive system of said step (2) adopts numerically-controlled machine self control system.
The present invention also provides a kind of numerical control machine slide rail feed screw nut seat comprehensive assembly precision measuring system; Said measuring system comprises tested screw mandrel, guide rail, nut seat; And the servomotor that is connected with tested screw mandrel and the control system of said servomotor, said control system comprises:
Motor drive module, the drive controlling of servomotor under the realization AD HOC;
Data acquisition module adopts electronic ruler to realize the variable quantity collection of operating position;
Data analysis module, the moment values of operating position variable quantity that difference is collected constantly and servo-drive system record is corresponding one by one, sets up the corresponding curve of X, Y shaft position variable quantity and moment values respectively, and stores; The data of storing in measured value and the following DBM are compared, obtain numerically-controlled machine screw mandrel, guide rail, the comprehensive assembly precision of nut seat; DBM is used to store numerically-controlled machine screw mandrel, guide rail, the nut seat mapping table between assembly precision and worktable X, the Y shaft position variable quantity each other, and storage.
The present invention compared with prior art; The present invention has following advantage and beneficial effect: said measuring system and measuring method are specially adapted to the measurement of large-scale crin bar numerical control machine slide rail, the comprehensive assembly precision of screw mandrel and nut seat assembling back, highly versatile, precision height; And control system of said system numerically-controlled machine capable of using own and related hardware help practicing thrift cost, increase work efficiency.
Description of drawings
Fig. 1 is said comprehensive assembly precision measuring system structured flowchart;
Fig. 2 is that said servo control system is formed schematic block diagram.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment technical scheme of the present invention is done further to specify.
As shown in Figure 1; The comprehensive assembly precision measuring system of numerical control machine slide rail feed screw nut seat according to the invention comprises that tested screw mandrel 1, guide rail 4, nut seat are positioned at worktable and are used to connect worktable 2 and screw mandrel 1 for 2 times, also comprises the servomotor 3 that is connected with tested screw mandrel 2 and the control system of said servomotor.
As shown in Figure 2, said control system comprises: motor drive module, the drive controlling of servomotor under the realization AD HOC; Data acquisition module adopts electronic ruler to realize the variable quantity collection of operating position; Data analysis module, the moment values of operating position variable quantity that difference is collected constantly and servo-drive system record is corresponding one by one, sets up the corresponding curve of X, Y shaft position variable quantity and moment values respectively, and stores; The data of storing in measured value and the following DBM are compared, obtain numerically-controlled machine screw mandrel, guide rail, the comprehensive assembly precision of nut seat; DBM is used to store numerically-controlled machine screw mandrel, guide rail, the nut seat mapping table between assembly precision and worktable X, the Y shaft position variable quantity each other, and storage.
After said system hardware connects, open the servo-drive system control system, seek a suitable voltage, make screw mandrel can cover whole process through test.Concrete operation method is: magnitude of voltage of elder generation's input, and click begins test, and it is difficult too big to sound out magnitude of voltage for the first time, otherwise possibly cause danger, generally adopts 0.01V safer.If in the process of going, stopped by resistance, can increase voltage next time so, make load can walk a farther distance, until making screw mandrel cover whole stroke.
The voltage that draws with above-mentioned test restarts test again, just can obtain reflecting the curve of current screw mandrel and the comprehensive assembly precision of guide rail.Test process writes down the variation that nut seat, worktable move forward and backward the moment values of each stage output of servo-drive system in the process by servo-drive system; And every at a distance from Fixed Time Interval real-time collecting work platform X, Y direction location variation respectively, the variable quantity of moment values through record and operating position obtains the comprehensive assembly precision of screw mandrel and guide rail again.
During the operation of control system drive motor, adopt Torque Control pattern control servo-driver and then drive motor, and motion control card adopts open loop mode work.When the power of servomotor output during greater than the friction force of worktable, worktable begins to move, and moment is big more, and movable workbench is fast more; When the power of servomotor output during less than the friction force of worktable, worktable does not move.If the comprehensive assembly precision of screw mandrel and guide rail is bad; Fluctuation is arranged, and then the friction force of worktable changes, and the speed that moves at same motor-driven power lower table changes; We set up database through the data of this variation, thus the comprehensive assembly precision of reflection screw mandrel and guide rail.
Can there be two kinds of working methods in said system; First kind: the translational speed of follow-up work platform; The maintenance translational speed is a definite value, and the friction force of worktable changes when the comprehensive assembly precision of worktable is bad, and the output torque that this moment, system changed motor automatically is to guarantee that moving speed of table is constant; We go out the bearing accuracy of worktable through laser interferometer measurement; Obtain the dynamic locating accuracy of this position simultaneously through the PID adjustment of sports cards, set up corresponding relation, be stored in the database with the moment values of its correspondence position.Second kind: system lets fixing moment of motor output come push work platform to move, the delta data of the translational speed of analysis software writing task platform, and the corresponding relation of setting up these data and assembly precision equally is stored in the database.
Corresponding relation that the accuracy data that DBM is measured data and other algnment accuracy testing tools of system acquisition according to the invention is set up and preservation obtain, and just set up the precision template, supply this measuring system to measure and demarcate use.
During actual enforcement; Said servo-drive system can adopt the control system of numerically-controlled machine self; Motor driven systems drive motor operation by numerically-controlled machine self; Only needing increases corresponding functional modules in numerically-controlled machine self system control sytsem, comprise data acquisition module, data analysis module and DBM.
Said system is provided with stop button, clicks to stop test, can stop test at any time.
The present invention sets up the comprehensive installation accuracy of worktable and the moment values change curve that collects and the corresponding data model of change curve of operating position in DBM; The data of storing in data that actual measurement is collected and the database compare; Thereby obtain the accurate of numerical control machine slide rail, screw mandrel and the comprehensive assembly precision of nut seat, accomplish and measure.
Not specifically described module is mature modules of the prior art in the system according to the invention, therefore its concrete implementation is not given unnecessary details.
The foregoing description is merely preferred implementation of the present invention; But embodiment of the present invention is not limited thereto; Anyly do not deviating from the change done under spirit of the present invention and the principle, modification, substituting, combination, simplifying; All should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (4)
1. the comprehensive assembly precision measuring method of numerical control machine slide rail feed screw nut seat, step is:
(1) controls a servomotor by servo-drive system and pass through the torsion of torque mode, leading screw rotation and drive nut seat, worktable are moved forward and backward to the different sizes of numerically-controlled machine leading screw transmission;
(2) move forward and backward the variation of each stage moment values in the process by servo-drive system record nut seat, worktable; And every at a distance from the real-time collecting work platform of Fixed Time Interval location variation, change and the variable quantity calculating screw mandrel of operating position and the comprehensive assembly precision of guide rail through moment values.
2. the comprehensive assembly precision measuring method of numerical control machine slide rail feed screw nut seat according to claim 1 is characterized in that: the described torque mode of step (1) comprises that servo-driver is operated in torque mode and motion control card is operated in open loop mode.
3. the comprehensive assembly precision measuring method of numerical control machine slide rail feed screw nut seat according to claim 2 is characterized in that: the said servo-drive system of step (2) adopts numerically-controlled machine self control system.
4. the comprehensive assembly precision measuring system of numerical control machine slide rail feed screw nut seat is characterized in that: comprise tested screw mandrel, guide rail, nut seat, and the servomotor that is connected with tested screw mandrel and the control system of said servomotor, said control system comprises:
Motor drive module adopts the Torque Control pattern to realize the drive controlling of servomotor;
Data acquisition module adopts electronic ruler to realize the variable quantity collection of operating position;
Data analysis module, the moment values of operating position variable quantity that difference is collected constantly and servo-drive system record is corresponding one by one, sets up the corresponding curve of X, Y shaft position variable quantity and moment values respectively, and stores; The data of storing in measured value and the following DBM are compared, obtain numerically-controlled machine screw mandrel, guide rail, the comprehensive assembly precision of nut seat;
DBM is used to store numerically-controlled machine screw mandrel, guide rail, the nut seat mapping table between assembly precision and worktable X, the Y shaft position variable quantity each other, and storage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010506612XA CN102022966B (en) | 2010-10-12 | 2010-10-12 | Measurement method and device of guide rail, screw rod and nut seat comprehensive assembly accuracy of numerical control machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010506612XA CN102022966B (en) | 2010-10-12 | 2010-10-12 | Measurement method and device of guide rail, screw rod and nut seat comprehensive assembly accuracy of numerical control machine |
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| Publication Number | Publication Date |
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| CN102022966A CN102022966A (en) | 2011-04-20 |
| CN102022966B true CN102022966B (en) | 2012-06-06 |
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| CN201010506612XA Expired - Fee Related CN102022966B (en) | 2010-10-12 | 2010-10-12 | Measurement method and device of guide rail, screw rod and nut seat comprehensive assembly accuracy of numerical control machine |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102707663B (en) * | 2012-05-18 | 2017-07-21 | 徐亦志 | A kind of Automatic device of meter lathe |
| CN103294806B (en) * | 2013-05-31 | 2016-06-22 | 沈机集团昆明机床股份有限公司 | A kind of guide rail slide block database building method supporting machine tool fast design and assembling |
| CN103294808B (en) * | 2013-05-31 | 2016-03-16 | 沈机集团昆明机床股份有限公司 | A kind of feed screw nut database building method supporting machine tool fast design and assembling |
| CN105737725B (en) * | 2014-12-10 | 2018-07-24 | 中国飞机强度研究所 | A kind of adjustment method of superconducting tilting suspension formula guide rail |
| CN104950811B (en) * | 2015-06-16 | 2017-10-31 | 华中科技大学 | A kind of NC machine tool feed system assembles the Quick method of quality |
| CN109682592B (en) * | 2019-02-22 | 2020-07-28 | 常熟理工学院 | Lead screw nut self-locking detection device for recycling lead screw |
| CN110567318B (en) * | 2019-08-02 | 2021-10-26 | 上海航天精密机械研究所 | Automatic detection device for launching tube and control method thereof |
| CN110871458B (en) * | 2019-11-29 | 2022-03-25 | 北京猎户星空科技有限公司 | Test method, device, equipment and medium for robot transmission mechanism |
| CN117046742B (en) * | 2023-10-13 | 2024-01-23 | 上海狄兹精密机械有限公司 | High-precision screw measuring equipment and measuring and sorting method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2764552Y (en) * | 2004-12-30 | 2006-03-15 | 陈战函 | Transmission device of numerical control machine |
| CN201844810U (en) * | 2010-10-12 | 2011-05-25 | 惠州市大亚湾天马电子机械有限公司 | Comprehensive assembly accuracy measuring system of guide rail, lead screw and nut seat of numerical control machine tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6903346B2 (en) * | 2001-07-11 | 2005-06-07 | Nikon Corporation | Stage assembly having a follower assembly |
| US7093827B2 (en) * | 2001-11-08 | 2006-08-22 | Massachusetts Institute Of Technology | Multiple degree of freedom compliant mechanism |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2764552Y (en) * | 2004-12-30 | 2006-03-15 | 陈战函 | Transmission device of numerical control machine |
| CN201844810U (en) * | 2010-10-12 | 2011-05-25 | 惠州市大亚湾天马电子机械有限公司 | Comprehensive assembly accuracy measuring system of guide rail, lead screw and nut seat of numerical control machine tool |
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