CN104359662A - Cylindrical compression spring parameter testing method - Google Patents
Cylindrical compression spring parameter testing method Download PDFInfo
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- CN104359662A CN104359662A CN201410630926.9A CN201410630926A CN104359662A CN 104359662 A CN104359662 A CN 104359662A CN 201410630926 A CN201410630926 A CN 201410630926A CN 104359662 A CN104359662 A CN 104359662A
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Abstract
The invention discloses a cylindrical compression spring parameter testing method. The method includes establishing the physical connection of an industrial control computer, a hydraulic drive device, a force and displacement sensor and a data acquiring and controlling system, by means of a detecting and controlling main program of the industrial control computer, implementing software connection by the aid of drive software, a PCI and a data acquisition control system, inputting the basic information of a detected spring, removing a loading original point, establishing a displacement original point, and executing tasks, including measuring an original height and a pressurization height, drawing a rigidity curve and calculating the rigidity of the detected spring, relative to spring parameter tests automatically. After product tests, the test data can be stored, and reports can be printed. According to the method, by means of displacement triggering and load triggering, the automation level of the tests is raised, and the testing efficiency and accuracy are improved.
Description
Technical field
The present invention relates to a kind of method of testing, particularly a kind of parameter test method of cylindrical compression spring, belong to detection technique field.
Background technology
Constant force spring hanging frame is a kind of important device for industrial pipeline supporting.When pipeline is subjected to displacement, it can provide constant supporting power, thus can not bring extra-stress to pipe-line equipment.But its supporting power invariance degree largely depends on the accuracy of the parameter of the cylindrical compression spring that it uses.Therefore, before assembly, must, to the parameter of cylindrical compression spring, as original free height, rear free height and rigidity value etc. be pressed to measure.This measurement is generally carried out by hand in conjunction with dynamometer and ruler, and process is loaded down with trivial details, precision is not high; More accurate method have employed the general spring testing machine based on computing machine and sensor technology.But due to the singularity of constant force spring hanging frame cylindrical compression spring test, general spring testing machine is difficult to meet robotization, low cost, high efficiency test request.Main Problems existing is that measuring process needs repeatedly artificial participant position location and excitation equivalence, makes test process not only tediously long but also out of true.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, a kind of parameter test method of cylindrical compression spring is provided, to solve the technical matters that in prior art, cylindrical compression spring parameter testing efficiency is low, measuring accuracy is not high.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of parameter test method of cylindrical compression spring, comprises the following steps:
step one: build test environment:
1) physical testing model is set up:
By industrial computer by PCI interface and data acquisition control system, realize observing and controlling communication;
The displacement transducer being used for measuring tested telescopic spring amount and the force snesor that is used for measuring tested spring expansion force are received the analog input end of the NI PCI-6221 multifunctional data acquisition card of data acquisition control system respectively by wire, read in simulating signal for industrial computer;
By two the digital output end connecting valve amplifiers of industrial computer by NI PCI-6221, then be connected with the fluid pressure drive device run up and down for controlling cylinder piston rod, piston-rod lower end connects the platen for compressing tested spring;
2) STE is built:
By the observing and controlling master routine in industrial computer, realize software by drive software NIDaqmx with pci interface and data acquisition control system to be connected, input the data relevant to spring model, comprising: the relation of minimum rigidity, maximum stiffness, demarcation displacement transducer reading and measuring height, set power activation levels;
step 2: building database:by the essential information of tested spring stored in database, comprise spring numbering, spring model, minimum load P1, operating load P2, maximum load P3;
step 3: execution parameter is tested:
Industrial computer exports steering order to fluid pressure drive device, and the cylinder piston rod of control linkage platen rises, and platen rising vacating space installs tested spring, removes force snesor initial point;
Tripping force trigging control program and displacement trigging control program, the cylinder piston rod of control linkage platen presses down, and completes the measurement of tested spring original height and the rear height of pressure;
Measure correspondence tested spring heights H1, H2, H3 of minimum load P1, operating load P2, maximum load P3 respectively, with tested spring heights for horizontal ordinate, tested spring load is ordinate, draws stiffness curve figure, calculates tested spring stiffness values;
step 4: output test result:the measurement result of step 3 is saved in database, and printing test is reported.
Further, the measuring method of described tested spring original height is: industrial computer gathers the force value signal that force snesor transmits, and whether this force value of automatic decision exceedes power activation levels, if, then measure the height of tested spring now, be designated as tested spring original height.
Further, after described tested spring pressure, the measuring method of height is: industrial computer order oil cylinder carries out three pressures also---release cycle, industrial computer gathers the displacement signal that displacement transducer transmits, start displacement when each circulation starts and trigger inquiry, in operation, whether this displacement signal of automatic decision exceedes pressure and height, if not, continue to press down; If so, then think that tested spring is pressed also, the piston rod that then industrial computer controls oil cylinder rises, and simultaneously whether the force value that transmits of automatic decision force snesor is lower than power activation levels, if not, continue to rise; If so, represent that tested spring affranchises, once press also that---discharge and terminate, press also in third time---, at the end of release, measures the height of tested spring now, be designated as the rear height of tested spring pressure.
Preferably, described tested spring stiffness values is: [(P2-P1)/(H2-H1)+(P3-P2)/(H3-H2)]/2.
Compared with prior art, the beneficial effect that the present invention reaches is: by introducing displacement triggering and power trigging control, be connected organic for the testing procedure of multiple spring parameter, after starting measurement, all testing procedures once automatically complete, accelerate testing progress on the one hand, improve testing efficiency; Another aspect avoids artificial participant position location and power locates the inconsistency brought, and improves measuring accuracy; By industrial computer TT&C system, test process and data are managed, realize spring parameter test automation, reduce testing cost.
Accompanying drawing explanation
Fig. 1 is the physical testing model of the foundation of the inventive method.
Fig. 2 is applicable to the trigging control process flow diagram that power triggers, displacement triggers.
Fig. 3 is the process flow diagram of the inventive method based on trigging control.
In figure: 1, industrial computer; 2, data acquisition control system; 3-1, displacement transducer; 3-2, force snesor; 4-1, oil cylinder; 4-2, platen; 4-3, fluid pressure drive device; 4-4, frame; 5, tested spring.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
The data acquisition drive software NIDaqmx that in the inventive method, the displacement measurement of spring and the data acquisition software of load use the NI PCI-6221 multifunctional data acquisition card of National Instruments company supporting.As shown in Figure 1, the physical testing model of foundation required for the present invention: comprise frame 4-4 and be arranged on oil cylinder 4-1 on frame 4-4, run through in oil cylinder 4-1 and have piston rod, the lower end of piston rod is stretched in frame 4-4 and is connected with platen 4-2, the top of platen 4-2 arranges force snesor 3-2, and tested spring 5 is positioned over below platen 4-2; Oil cylinder 4-1 connection bit displacement sensor 3-1 is stretched out in the upper end of piston rod.Oil cylinder 4-1 being connected with fluid pressure drive device 4-3, running up and down for controlling oil cylinder 4-1 piston rod.
The parameter test method of cylindrical compression spring of the present invention, concrete operation step is as follows:
step one: build test environment:
1) physical testing model is set up:
By industrial computer 1 by PCI interface and data acquisition control system 2, realize observing and controlling communication.
The displacement transducer 3-1 being used for measuring tested spring 5 stroke and the force snesor 3-2 that is used for measuring tested spring 5 expansion force is received the analog input end of the NI PCI-6221 multifunctional data acquisition card of data acquisition control system 2 respectively by wire, read in simulating signal for industrial computer 1.
By two the digital output end connecting valve amplifiers of industrial computer 1 by NI PCI-6221, then be connected with the fluid pressure drive device 4-3 run up and down for controlling oil cylinder 4-1 piston rod, piston-rod lower end connects the platen 4-2 for compressing tested spring 5.
2) STE is built:
By the observing and controlling master routine in industrial computer 1, realize software with pci interface with data acquisition control system 2 by drive software NIDaqmx to be connected, input the data relevant to spring model, comprising: the relation of minimum rigidity, maximum stiffness, demarcation displacement transducer 3-1 reading and measuring height, set power activation levels;
step 2: building database:by the essential information of tested spring 5 stored in database, comprise spring numbering, spring model, minimum load P1, operating load P2, maximum load P3;
step 3: execution parameter is tested:
Industrial computer 1 exports steering order to fluid pressure drive device 4-3, performs travelling control, and the oil cylinder 4-1 piston rod of control linkage platen 4-2 rises, and platen 4-2 rising vacating space installs tested spring 5, removes force snesor 3-2 initial point.
Highly all adopting trigging control for after tested spring 5 original height and pressure, as shown in Figure 2, is trigging control process flow diagram, is not only applicable to displacement and triggers, and the power that is also applicable to triggers.Its principle is: the shift value (being converted to the positional value of platen 4-2) or the force snesor 3-2 value that first read displacement transducer 3-1, given corresponding trigger position and power activation levels; Then judge whether currency is greater than activation levels: if then illustrate and need inquiry negative edge to trigger; If not, then illustrate and need inquiry rising edge to trigger.Program to be marked time waits according to the burst types that will inquire about again, until corresponding triggering is found.
After just adopting tested spring 5 original height of above-mentioned trigger control method, pressure below, the measuring process of corresponding spring heights H1, H2, H3 of height, minimum load P1, operating load P2, maximum load P3 is described in detail:
Tripping force trigging control program and displacement trigging control program, industrial computer 1 controls platen 4-2 and runs downwards, before platen 4-2 contacts tested spring 5, the output valve of force snesor 3-2 should be null value, when platen 4-2 touches tested spring 5 upper surface completely, force snesor 3-2 can sense a less acting force, this acting force reflects by setting a suitable power activation levels, trigger finds that rising edge triggers, namely whether this force value of industrial computer 1 automatic decision exceedes power activation levels, if, then measure the height of tested spring 5 now, be designated as tested spring 5 original height.
Tested spring 5 presses the measuring method of rear height to be: industrial computer 1 order oil cylinder 4-1 carries out three pressures also---release cycle, industrial computer 1 gathers the displacement signal that displacement transducer 3-1 transmits, start displacement when each circulation starts and trigger inquiry, in operation, whether this displacement signal of automatic decision exceedes pressure and height (rising edge triggering), if not, continue to press down; If so, then think that tested spring 5 is pressed also, the piston rod that then industrial computer 1 controls oil cylinder 4-1 rises, and simultaneously whether the force value that transmits of automatic decision force snesor 3-2 is lower than power activation levels, if not, continue to rise; If so, representing that tested spring 5 affranchises, once press also---release terminates, and presses also in third time---and at the end of release, measure the height of tested spring 5 now, be designated as tested spring 5 and press rear height.
Industrial computer 1 order platen 4-2 presses down for the last time, the process that presses down is inquired about minimum load P1 rising edge successively and is triggered, operating load P2 rising edge triggers, maximum load P3 rising edge triggers, and corresponding tested spring 5 height H 1 is measured when finding triggering at every turn, H2, H3, after measurement terminates, industrial computer 1 software program with the height of tested spring 5 for horizontal ordinate, the load of tested spring 5 is ordinate, draw stiffness curve figure, calculate the rigidity value of tested spring 5, tested spring 5 Rigidity Calculation value=[(P2-P1)/(H2-H1)+(P3-P2)/(H3-H2)]/2.
step 4: output test result:the measurement result of step 3 is saved in database, and printing test is reported.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.
Claims (4)
1. a parameter test method for cylindrical compression spring, is characterized in that, comprises the following steps:
step one: build test environment:
1) physical testing model is set up:
By industrial computer by PCI interface and data acquisition control system, realize observing and controlling communication;
The displacement transducer being used for measuring tested telescopic spring amount and the force snesor that is used for measuring tested spring expansion force are received the analog input end of the NI PCI-6221 multifunctional data acquisition card of data acquisition control system respectively by wire, read in simulating signal for industrial computer;
By two the digital output end connecting valve amplifiers of industrial computer by NI PCI-6221, then be connected with the fluid pressure drive device run up and down for controlling cylinder piston rod, piston-rod lower end connects the platen for compressing tested spring;
2) STE is built:
By the observing and controlling master routine in industrial computer, realize software by drive software NIDaqmx with pci interface and data acquisition control system to be connected, input the data relevant to spring model, comprising: the relation of minimum rigidity, maximum stiffness, demarcation displacement transducer reading and measuring height, set power activation levels;
step 2: building database:by the essential information of tested spring stored in database, comprise spring numbering, spring model, minimum load P1, operating load P2, maximum load P3;
step 3: execution parameter is tested:
Industrial computer exports steering order to fluid pressure drive device, and the cylinder piston rod of control linkage platen rises, and platen rising vacating space installs tested spring, removes force snesor initial point;
Tripping force trigging control program and displacement trigging control program, the cylinder piston rod of control linkage platen presses down, and completes the measurement of tested spring original height and the rear height of pressure;
Measure correspondence tested spring heights H1, H2, H3 of minimum load P1, operating load P2, maximum load P3 respectively, with tested spring heights for horizontal ordinate, tested spring load is ordinate, draws stiffness curve figure, calculates tested spring stiffness values;
step 4: output test result:the measurement result of step 3 is saved in database, and printing test is reported.
2. the parameter test method of cylindrical compression spring according to claim 1, it is characterized in that, the measuring method of described tested spring original height is: industrial computer gathers the force value signal that force snesor transmits, whether this force value of automatic decision exceedes power activation levels, if, then measure the height of tested spring now, be designated as tested spring original height.
3. the parameter test method of cylindrical compression spring according to claim 1, it is characterized in that, after described tested spring pressure, the measuring method of height is: industrial computer order oil cylinder carries out three pressures also---release cycle, industrial computer gathers the displacement signal that displacement transducer transmits, start displacement when each circulation starts and trigger inquiry, in operation, whether this displacement signal of automatic decision exceedes pressure and height, if not, continue to press down; If so, then think that tested spring is pressed also, the piston rod that then industrial computer controls oil cylinder rises, and simultaneously whether the force value that transmits of automatic decision force snesor is lower than power activation levels, if not, continue to rise; If so, represent that tested spring affranchises, once press also that---discharge and terminate, press also in third time---, at the end of release, measures the height of tested spring now, be designated as the rear height of tested spring pressure.
4. the parameter test method of cylindrical compression spring according to claim 1, is characterized in that, described tested spring stiffness values is: [(P2-P1)/(H2-H1)+(P3-P2)/(H3-H2)]/2.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508614A (en) * | 2016-01-27 | 2016-04-20 | 安庆市鸿裕工业产品设计有限公司 | Spring compression regulating component of mechanical seal |
| CN106468618A (en) * | 2016-08-31 | 2017-03-01 | 大连宜顺机电有限公司 | Portable spring dynamometer |
| CN106546422A (en) * | 2016-11-08 | 2017-03-29 | 浙江省特种设备检验研究院 | A kind of method of on-line measurement suspension and support spring rate |
| CN106908313A (en) * | 2017-04-13 | 2017-06-30 | 西安交通大学 | The small load control system of big load testing machine and control method |
| CN107702991A (en) * | 2017-11-10 | 2018-02-16 | 中车贵阳车辆有限公司 | A kind of spring contact line detection mode and device |
| CN108534728A (en) * | 2018-04-04 | 2018-09-14 | 济南凯镭迪精密仪器有限公司 | A kind of bearing spring appearance and size detection device and method |
| CN111023944A (en) * | 2019-12-05 | 2020-04-17 | 谢全罗 | Early warning device for detecting required height of mattress spring |
| CN113375882A (en) * | 2021-07-27 | 2021-09-10 | 中国兵器工业第五九研究所 | Spring measuring device and method for measuring spring load |
| CN113732699A (en) * | 2021-10-25 | 2021-12-03 | 中天智能装备有限公司 | Automatic assembly production line for elevator brake caliper |
| CN114370799A (en) * | 2021-12-31 | 2022-04-19 | 浙江兰菱机械股份有限公司 | Spring compression height detection method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD232545A1 (en) * | 1984-12-13 | 1986-01-29 | Suhl Feinmesszeugfab Veb | MEASURING HEAD, ESPECIALLY FOR INCREMENTAL HEIGHT MEASURING AND TILTING EQUIPMENT |
| DE3725207A1 (en) * | 1987-07-30 | 1989-02-09 | Zeiss Carl Fa | PROBE HEAD FOR COORDINATE MEASURING DEVICES |
| DE19758283A1 (en) * | 1997-12-31 | 1999-07-01 | Hejm Gmbh Haustechnik & Elektr | Absolute length measuring system using spring and force meter |
| CN101144712A (en) * | 2007-10-31 | 2008-03-19 | 江南大学 | Piston integrated measurement system |
| CN202372344U (en) * | 2011-12-15 | 2012-08-08 | 福建龙净环保股份有限公司 | Experiment table device for testing performance of spray nozzle |
| CN202648931U (en) * | 2012-05-29 | 2013-01-02 | 东莞市海德试验仪器有限公司 | Durability testing device for expansion tank |
| CN202916083U (en) * | 2012-11-19 | 2013-05-01 | 中国测试技术研究院电子研究所 | Device for detecting dynamic performance of ABS pneumatic solenoid valve |
-
2014
- 2014-11-11 CN CN201410630926.9A patent/CN104359662A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD232545A1 (en) * | 1984-12-13 | 1986-01-29 | Suhl Feinmesszeugfab Veb | MEASURING HEAD, ESPECIALLY FOR INCREMENTAL HEIGHT MEASURING AND TILTING EQUIPMENT |
| DE3725207A1 (en) * | 1987-07-30 | 1989-02-09 | Zeiss Carl Fa | PROBE HEAD FOR COORDINATE MEASURING DEVICES |
| DE19758283A1 (en) * | 1997-12-31 | 1999-07-01 | Hejm Gmbh Haustechnik & Elektr | Absolute length measuring system using spring and force meter |
| CN101144712A (en) * | 2007-10-31 | 2008-03-19 | 江南大学 | Piston integrated measurement system |
| CN100462676C (en) * | 2007-10-31 | 2009-02-18 | 江南大学 | Piston integrated measurement system |
| CN202372344U (en) * | 2011-12-15 | 2012-08-08 | 福建龙净环保股份有限公司 | Experiment table device for testing performance of spray nozzle |
| CN202648931U (en) * | 2012-05-29 | 2013-01-02 | 东莞市海德试验仪器有限公司 | Durability testing device for expansion tank |
| CN202916083U (en) * | 2012-11-19 | 2013-05-01 | 中国测试技术研究院电子研究所 | Device for detecting dynamic performance of ABS pneumatic solenoid valve |
Non-Patent Citations (1)
| Title |
|---|
| 王伟: "智能三通阀弹簧检测仪研究", 《中国优秀博硕士学位论文全文数据库 ( 硕士 ) 工程科技 Ⅱ 辑》 * |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508614A (en) * | 2016-01-27 | 2016-04-20 | 安庆市鸿裕工业产品设计有限公司 | Spring compression regulating component of mechanical seal |
| CN106468618A (en) * | 2016-08-31 | 2017-03-01 | 大连宜顺机电有限公司 | Portable spring dynamometer |
| CN106468618B (en) * | 2016-08-31 | 2019-06-18 | 大连宜顺机电有限公司 | Portable spring dynamometer |
| CN106546422A (en) * | 2016-11-08 | 2017-03-29 | 浙江省特种设备检验研究院 | A kind of method of on-line measurement suspension and support spring rate |
| CN106908313A (en) * | 2017-04-13 | 2017-06-30 | 西安交通大学 | The small load control system of big load testing machine and control method |
| CN106908313B (en) * | 2017-04-13 | 2019-06-04 | 西安交通大学 | The small load control system of big load testing machine and control method |
| CN107702991B (en) * | 2017-11-10 | 2024-04-02 | 中车贵阳车辆有限公司 | Spring contact line detection mode and device |
| CN107702991A (en) * | 2017-11-10 | 2018-02-16 | 中车贵阳车辆有限公司 | A kind of spring contact line detection mode and device |
| CN108534728A (en) * | 2018-04-04 | 2018-09-14 | 济南凯镭迪精密仪器有限公司 | A kind of bearing spring appearance and size detection device and method |
| CN111023944A (en) * | 2019-12-05 | 2020-04-17 | 谢全罗 | Early warning device for detecting required height of mattress spring |
| CN111023944B (en) * | 2019-12-05 | 2021-05-28 | 浙江思密达智能装备有限公司 | Early warning device for detecting required height of mattress spring |
| CN113375882A (en) * | 2021-07-27 | 2021-09-10 | 中国兵器工业第五九研究所 | Spring measuring device and method for measuring spring load |
| CN113375882B (en) * | 2021-07-27 | 2022-09-09 | 中国兵器工业第五九研究所 | Spring measuring device and method for measuring spring load |
| CN113732699A (en) * | 2021-10-25 | 2021-12-03 | 中天智能装备有限公司 | Automatic assembly production line for elevator brake caliper |
| CN114370799A (en) * | 2021-12-31 | 2022-04-19 | 浙江兰菱机械股份有限公司 | Spring compression height detection method |
| CN114370799B (en) * | 2021-12-31 | 2023-07-28 | 浙江兰菱机械股份有限公司 | Spring pressure and height detection method |
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Application publication date: 20150218 |