CN104458225A - Complete-machine static rigidity detection control system for numerical control machine tool - Google Patents

Complete-machine static rigidity detection control system for numerical control machine tool Download PDF

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Publication number
CN104458225A
CN104458225A CN201410613923.4A CN201410613923A CN104458225A CN 104458225 A CN104458225 A CN 104458225A CN 201410613923 A CN201410613923 A CN 201410613923A CN 104458225 A CN104458225 A CN 104458225A
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China
Prior art keywords
das
control
data acquisition
hydraulic cylinder
machine
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CN201410613923.4A
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Chinese (zh)
Inventor
吕术亮
国冬
张莹
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DINGQI (TIANJIN) SPINDLE TECHNOLOGY Co Ltd
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DINGQI (TIANJIN) SPINDLE TECHNOLOGY Co Ltd
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Priority to CN201410613923.4A priority Critical patent/CN104458225A/en
Publication of CN104458225A publication Critical patent/CN104458225A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a complete-machine static rigidity detection control system for a numerical control machine tool. The complete-machine static rigidity detection control system is mainly composed of a data collecting and movement control system and a three-degree-of-freedom loading executing unit. The data collecting and movement control system is composed of a force sensor, an eddy current displacement sensor, an NI data collecting card, an NI movement control card and a PC. The three-degree-of-freedom loading executing unit is mainly composed of a servo valve, a hydraulic cylinder, a disc spring, a probe and a check rod installed on a main shaft. According to the complete-machine static rigidity detection control system, the loading force is controlled by the computer, signal processing is detected through the sensors, automation of a detection system is achieved to a certain degree, and the complete-machine static rigidity detection control system is reliable and convenient to operate and can be widely applied.

Description

A kind of numerically-controlled machine complete machine Static stiffness detecting and controlling system
Technical field
Patent of the present invention relates to the performance detecting system in numerically-controlled machine field, particularly about a kind of numerically-controlled machine complete machine Static stiffness detecting and controlling system.
Background technology
The ability of resistance to deformation when the complete machine Static stiffness of numerically-controlled machine refers to that it in space three vertical direction is born permanent load, it is the important indicator of Machine Tool design, the static properties of lathe can affect its dynamic perfromance, the static deformation of the lathe under the effect of permanent load and self gravitation not only can change the geometric accuracy of parts, reduce crudy, also can to the vibration resistance of lathe, throughput rate, noise, mission life, moving equilibrium, the properties such as heating and wearing and tearing impact, in order to accurately also reliably design main shaft and the miscellaneous part of numerically-controlled machine, be necessary to carry out testing and analysis to the complete machine Static stiffness of numerically-controlled machine.
Study the Static stiffness characteristic of lathe, carrying out improving for weak link is a job with important practical significance.Much the document of the Static stiffness method of testing of machining center is delivered although existing at present, but one is very unripe, easy, can by the method for testing generally applied, more do not have a kind of reliable test macro or apparatus to meet the heavy demand of current manufacturing enterprise and colleges and universities, the research of a large amount of scholar only rests in scheme or test, and the method for testing developed can only measure the Static stiffness of a direction mostly, but not x, y, z three directions are measured, and there is significant limitation simultaneously.And even if three direction Static stiffness can be surveyed, its test macro is scattered too, cannot widely apply, the present invention develop advanced numerically-controlled machine complete machine Static stiffness detecting and controlling system, the Structural Static rigidity test of single direction or many vertical direction can be realized, achievement in research is suitable for colleges and universities and Machine Manufacture enterprise, is significant to the shortcoming making up current numerically-controlled machine industry complete machine Static stiffness measurement mechanism.
Summary of the invention
The present invention provides a kind of numerically-controlled machine complete machine Static stiffness detecting and controlling system for solving in known technology the technical matters that exists, this system architecture is simple, easy to operate, more accurately can carry out testing and analysis to the complete machine Static stiffness of numerically-controlled machine, there is higher reliability simultaneously.
The present invention for the technical scheme solving in known technology the technical matters that exists and take is: a kind of numerically-controlled machine complete machine Static stiffness detecting and controlling system, mainly comprises data acquisition system (DAS) and kinetic control system and Three Degree Of Freedom load and execution unit.Described data acquisition system (DAS) and control system are made up of pressure transducer, eddy current displacement sensor, NI data acquisition system (DAS) card, NI motion control card and PC; Described Three Degree Of Freedom load and execution unit primarily of servo-valve, hydraulic cylinder, disc spring, pop one's head in and be arranged on the compositions such as check rod on main shaft.
Run in described PC and have the motion control program worked out by LabVIEW, described NI motion control card is connected with described PC, value-added tax function is selected by human-computer interaction interface, described PC sends load instructions, by servo-valve action described in described NI motion control card control, described hydraulic pump provides required drive to originate, hydraulic oil in Hydraulic Station is flowed in described hydraulic cylinder by specifying pipeline, piston in described hydraulic cylinder is released forward, compress described disc spring simultaneously, described piston is connected with described probe, described probe travels forward and to contact with described check rod under the effect of piston, described check rod is arranged in surveyed main shaft, and then power is applied on described main shaft, described main shaft is made to produce certain deformation.Owing to adopting single-acting formula hydraulic cylinder, pressure oil only supplies a chamber of hydraulic cylinder, and hydraulic coupling can only make cylinder realize unidirectional motion, and move in the other direction, outer power (as spring force) realizes.When described PC sends unloading command, the value of setting loading force, servo-valve described in described NI motion control card control stops action, return original state, by the described disc spring resilience of compression, make the piston in described hydraulic cylinder get back to origin-location, hydraulic oil is flowed back in Hydraulic Station by another road pipeline simultaneously.The described pressure transducer be connected on described probe can detect the size of the power be applied on main shaft, described eddy current displacement sensor can detect the displacement that described check rod produces, the data acquisition system program of described PC by being worked out by LabVIEW, by described data acquisition system (DAS) card by force signal and displacement signal acquisition in described PC, rely on described PC to realize the computing of data, analysis, process, display and storage, Calculation results shows in modes such as numeral and figures the most at last.
The advantage that the present invention has and good effect are:
1) human-computer interaction interface of computing machine is adopted to carry out the collection of controlled loading power size and sensor institute detection signal, convenient to operation, achieve the robotization of detection system to a certain extent;
2) utilize the powerful data operation processing power of computing machine, testing result is shown rapidly and accurately, power and shift value can be recorded in real time, greatly increase detection efficiency and precision;
3) the Structural Static rigidity test of single direction and many vertical direction can be realized, functional diversities, required test purpose can be reached according to different demand.
Accompanying drawing explanation
Fig. 1 is detecting and controlling system schematic diagram of the present invention;
Fig. 2 is Three Degree Of Freedom loading unit structural representation of the present invention;
Fig. 3 is test flow chart of the present invention;
Number in the figure title: 1. main shaft, the eddy current displacement sensor in 2.X direction, the eddy current displacement sensor in 3.Y direction, the eddy current displacement sensor in 4.Z direction, 5. check rod, the probe in 6.X direction, the probe in 7.Y direction, the probe in 8.Z direction, the hydraulic cylinder in 9.X direction, the hydraulic cylinder in 10.Y direction, the cylinder pressure of 11.Z direction liquid.
Embodiment
For summary of the invention of the present invention, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1, Fig. 2 and Fig. 3, the present invention is used for numerically-controlled machine complete machine Static stiffness detecting and controlling system, forms primarily of data acquisition system (DAS) and kinetic control system and Three Degree Of Freedom load and execution unit; Described Three Degree Of Freedom load and execution unit is made up of pressure transducer, eddy current displacement sensor 2,3 and 4, NI data acquisition system (DAS) card, NI motion control card and PC primarily of described data acquisition system (DAS) and control system.Described Three Degree Of Freedom load and execution unit primarily of servo-valve, hydraulic cylinder 9,10 and 11, disc spring, to pop one's head in and the check rod 5 be arranged on main shaft 1 is grouped into.
Run in PC and have the motion control program worked out by LabVIEW, NI motion control card is connected with PC, value-added tax function is selected by human-computer interaction interface, PC sends load instructions, the value of setting loading force, by the action of NI motion control card control servo-valve, hydraulic pump passes through to specify pipeline injection liquid cylinder pressure 9 by after the hydraulic oil pressurization in Hydraulic Station, in 10 and 11, piston is released forward, compress disc spring simultaneously, hydraulic cylinder 9, piston in 10 and 11 is connected with probe 6, 7 and 8, probe 6, 7 and 8 travel forward exposure test rod 5, check rod 5 is arranged in surveyed main shaft 1, and then power is applied on main shaft 1, main shaft 1 is made to produce certain deformation.When PC sends unloading command, NI motion control card control servo-valve stops action, returns original state, by the disc spring resilience compressed, makes the piston in hydraulic cylinder 9,10 and 11 get back to origin-location, and hydraulic oil is flowed back in Hydraulic Station by another road pipeline simultaneously.Be connected to the size that probe 6,7 and 8 upward pressure sensor can detect the power be applied on main shaft 1, eddy current displacement sensor 2,3 and 4 can Check and Inspection rod 5 produce displacement, the data acquisition system program of PC by being worked out by LabVIEW, by data acquisition system (DAS) card by force signal and displacement signal acquisition in PC, PC is relied on to realize the computing of data, analysis, process, display and storage, by following Static stiffness formulae discovery:
K = F X
Calculation results shows in modes such as numeral and figures the most at last.
Principle of work of the present invention:
Illustrate with X-direction, run in PC and have the motion control program worked out by LabVIEW, NI motion control card is connected with PC, value-added tax function is selected by human-computer interaction interface, PC sends load instructions, the value of setting loading force, by the action of NI motion control card control servo-valve, hydraulic pump passes through to specify in pipeline injection liquid cylinder pressure 9 by after the hydraulic oil pressurization in Hydraulic Station, promote horizontal piston to left movement, disc spring compression deformation under the effect of piston, piston is connected with probe 6, probe 6 travels forward and finally acts on check rod 5 by power, check rod 5 is arranged in surveyed main shaft 1, so make main shaft 1 produce certain deformation, between horizontal piston and probe 6, be provided with pressure transducer for measuring expulsive force simultaneously.Along with the continuous increase of hydraulic coupling, check rod 5 is out of shape also will constantly be increased, and deflection will be recorded by eddy current displacement sensor 2.The data acquisition system program of PC by being worked out by LabVIEW, by data acquisition system (DAS) card by force signal and displacement signal acquisition in PC, rely on PC to realize the computing of data, analysis, process, display and storage, Calculation results shows in modes such as numeral and figures (stiffness curve) the most at last.When PC sends unloading command, NI motion control card control servo-valve stops action, returns original state.Owing to adopting single-acting formula hydraulic cylinder, pressure oil only supplies a chamber of hydraulic cylinder, and hydraulic coupling can only make cylinder realize unidirectional motion, and move in the other direction, outer power (as spring force) realizes.By the disc spring resilience compressed, make piston get back to origin-location, hydraulic cylinder 9 hydraulic oil is flowed back in Hydraulic Station by another road pipeline simultaneously.
In like manner, Y is identical with X-direction with the Cleaning Principle of Z-direction, can test the Static stiffness of Y and Z-direction according to the demand of reality.
Although be described the preferred embodiments of the present invention by reference to the accompanying drawings above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, can also make a lot of form, these all belong within protection scope of the present invention.

Claims (4)

1. a numerically-controlled machine complete machine Static stiffness detecting and controlling system, comprise data acquisition system (DAS), kinetic control system and Three Degree Of Freedom load and execution unit, it is characterized in that: described data acquisition system (DAS) and kinetic control system comprise pressure transducer, eddy current displacement sensor, NI data acquisition system (DAS) card, NI motion control card and PC; Described Three Degree Of Freedom load and execution unit comprises servo-valve, hydraulic cylinder, disc spring, pops one's head in and be arranged on the check rod on main shaft; Described check rod will sense that probe and data are sent to described eddy current displacement sensor, described data acquisition system (DAS) and kinetic control system realize effectively controlling the thrust of described hydraulic cylinder by described NI motion control card and described servo-valve, and described pressure transducer can record the instantaneous value of described disc spring to probe imposed load; The Signal transmissions that described eddy current displacement sensor and described pressure transducer can gather by described data acquisition system (DAS) and kinetic control system, to described PC, utilizes described PC to realize automatic calculating and the Drawing of Curve of complete machine rigidity.
2. a kind of numerically-controlled machine complete machine Static stiffness detecting and controlling system according to claim 1, it is characterized in that: the human-computer interaction interface of described PC can control the Structural Static rigidity test that the selection of described Three Degree Of Freedom load and execution unit and optimum configurations realize single direction and many vertical direction simultaneously, meets the functional requirement under different situations.
3. a kind of numerically-controlled machine complete machine Static stiffness detecting and controlling system according to claim 1, it is characterized in that: the human-computer interaction interface of described PC can realize the state modulator of described hydraulic cylinder loading force, and calculate the rigidity of machine tool by described pressure transducer and described current vortex sensor Real-time Collection loading force and displacement parameter.
4. a kind of numerically-controlled machine complete machine Static stiffness detecting and controlling system according to claim 1, is characterized in that: described eddy current displacement sensor, probe and hydraulic cylinder are all respectively provided with one in X, Y, Z tri-directions.
CN201410613923.4A 2014-11-04 2014-11-04 Complete-machine static rigidity detection control system for numerical control machine tool Pending CN104458225A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105021390A (en) * 2015-07-27 2015-11-04 天津大学 Numerical control machine tool main shaft unit static stiffness testing apparatus and test method
CN105388011A (en) * 2015-12-25 2016-03-09 鼎奇(天津)主轴科技有限公司 Test apparatus for axial static rigidity of main shaft and using method thereof
CN105628377A (en) * 2015-12-25 2016-06-01 鼎奇(天津)主轴科技有限公司 Spindle axial static rigidity test method and control system
CN106092611A (en) * 2016-08-11 2016-11-09 上海大学 Auto parts and components rigidity tester
CN109581087A (en) * 2017-09-27 2019-04-05 上海铼钠克数控科技股份有限公司 Machine tool guideway method for testing performance and system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105021390A (en) * 2015-07-27 2015-11-04 天津大学 Numerical control machine tool main shaft unit static stiffness testing apparatus and test method
CN105388011A (en) * 2015-12-25 2016-03-09 鼎奇(天津)主轴科技有限公司 Test apparatus for axial static rigidity of main shaft and using method thereof
CN105628377A (en) * 2015-12-25 2016-06-01 鼎奇(天津)主轴科技有限公司 Spindle axial static rigidity test method and control system
CN106092611A (en) * 2016-08-11 2016-11-09 上海大学 Auto parts and components rigidity tester
CN109581087A (en) * 2017-09-27 2019-04-05 上海铼钠克数控科技股份有限公司 Machine tool guideway method for testing performance and system

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