CN105759711A - Method and device for acquiring mold line data of profile stretch bender - Google Patents
Method and device for acquiring mold line data of profile stretch bender Download PDFInfo
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- CN105759711A CN105759711A CN201610180996.8A CN201610180996A CN105759711A CN 105759711 A CN105759711 A CN 105759711A CN 201610180996 A CN201610180996 A CN 201610180996A CN 105759711 A CN105759711 A CN 105759711A
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- plc
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- stay cord
- host computer
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/13—Plc programming
- G05B2219/13024—Convert digital logic of hardware circuit into plc software
Abstract
The invention discloses a method for acquiring the mold line data of a profile stretch bender. The method comprises the following steps of: (1) acquiring the displacement of a stay rope and the positional data of a swing arm by using a PLC encoder module and a PLC analog quantity module; (2) acquiring the displacement of the stay rope and the position of the swing arm every time when the swing arm moves a certain angle; (3) converting digital values acquired by the PLC encoder module and the PLC analog quantity module into actual values by scale conversion; and (4) displaying the position of the swing arm and the displacement of the stay rope on a host computer by using the communication between a PLC and the host computer. The method directly acquires data by replacing a computer with the PLC so as to enhance profile stretching-bending quality and production efficiency.
Description
Technical field
The present invention relates to automation control area, the acquisition method of especially a kind of stretch bending machine loft data and harvester.
Background technology
The method that current stretch bending equipment loft movement locus collection uses computer directly to gather, this kind of method has two computer forming control systems, main frame is developed as upper computer software, has installed digital quantity, analog quantity board from the computer bottom plate of machine, for signals collecting and output.This kind of method stability when carrying out loft movement locus and gathering is low, low precision, and response speed is slow, and volume is relatively big, is unfavorable for installing.
Separately having China Patent No. is 201110303703.8, disclose the method for designing of stretch bending loading trace of novel stretch bender, including step: each segmentation that the serpentine track curve discrete one-tenth of section bar is replaced with string, BENDING PROCESS in shaping is separated into each bending step, set up elongation and the profile length of each bending step medium section, formula relationship between bending radius, obtains the elongation of each bending step medium section part；Simulation BENDING PROCESS, sets up the geometrical relationship of the coordinate bending control point in each bending step, obtains control point coordinate in each bending step；Control point is bent the coordinate in step at each and imports simulation software, be calculated.The present invention is by replacing discrete for circular arc string, at control point along string move time shape bending, the process of bending applies amount of tension, can well uniformly strain within heavy section, reduce wrinkling and distortion, improve dimensional accuracy, simultaneously because stretch in the process of bending, mend the technique drawn can remove, it is possible to improve production efficiency.Owing to geometric locus being separated into each segmentation replaced with string, the angle calculated by mathematical method and elongation by the method, inevitable error can be produced unavoidably, the precision impact of part processing is very big.
Summary of the invention
In order to overcome the defect of above-mentioned prior art, the acquisition method of the present invention a kind of stretch bending machine loft data and harvester, its objective is to provide a kind of cost low, efficiency is high, good reliability, fast response time loft data collecting system.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is:
The acquisition method of a kind of stretch bending machine loft data, it is characterised in that comprise the steps:
(1) utilize PLC coder module and PLC analog module that the displacement of stay cord and the angle-data of arm pendulum are acquired；
(2) angle acquisition that displacement and the arm of stay cord are put by arm pendulum often swing certain angle is once；
(3) by scale conversion, the digital value of PLC coder module and PLC analog module collection is converted to actual value；
(4) arm swinging and the stay cord displacement actual value step (3) changed show on host computer.
Described step (3) can be passed through software and adjust gain and the biasing of scale conversion, make actual value more accurate.
Described coder module is incremental, and analog module input signal is 16 Differential Input.
It is 0.6o-2o that described arm pendulum often swings certain angle.
Described step (5) is distributed by address, and host computer will read the data of PLC coder module and PLC analog module, and sets up the data that form display gathers in host computer.
A kind of harvester of stretch bending machine loft data, it is characterized in that: include host computer, PLC coder module, PLC analog module, stay cord encoder and angular transducer, described host computer respectively with PLC coder module and PLC analog module communication, described PLC coder module is connected with stay cord encoder, and described PLC analog module is connected with angular transducer.
Described PLC coder module and PLC analog module respectively two, described stay cord encoder is two, and described angular transducer is two.
The invention have the advantages that
Low according to the loft motion trace data acquisition system cost that such scheme provided by the invention manufactures and designs, efficiency is high, and good reliability, stretch bending steady quality is reliable.Utilize PLC to replace computer direct data capture, improve zero stretch bending quality and production efficiency.It is mainly reflected in
(1) cost is low.The stretch bending machine abroad with loft motion trace data acquisition system is worth at about 1,200,000 dollars/platform, and adopts the repertoire of loft motion trace data acquisition system that such scheme of the present invention manufactures, and cost is less than 300,000 yuans.
(2) accuracy of data acquisition is high, acquisition length is wide, stretch bending steady quality is reliable, efficiency is high.The present invention adopts PLC analog module and coder module to gather data, solves original technology and adopts computer simulation card directly to gather data, and the impact that this kind of acquisition mode is subject to computing power can cause acquisition precision and picking rate.Control software design have employed algorithm unlike the prior art be controlled so that the response speed of equipment is higher than the fast of other company and control accuracy.
(3) it is dependable performance due to what adopt, widely used PLC analog module and coder module, add perfect protective measure, so the reliability of whole system is significantly high, the concordance of stretch bending quality is good.
(4) arm pendulum gathers position and the stay cord displacement of a secondary arm pendulum every 0.6o-2o, and part stretch bending best results, the qualification rate of product is the highest.Being because when collection period is less than 0.6 °/time, equipment control accuracy and response speed are required height, gather data and can cause arm pendulum shake in actual applications, the motor control process of forming parts is out of control；When collection period is more than 0.6 °/time, forming parts low precision, do not reach examination requirements.
Accompanying drawing explanation
Fig. 1 is electrical hardware catenation principle figure of the present invention.
Fig. 2 is present procedure Planning procedure figure.
Detailed description of the invention
Embodiment 1
As shown in Figure 1 and Figure 2, a kind of harvester of stretch bending machine loft data, including host computer, PLC coder module, PLC analog module, stay cord encoder and angular transducer, described host computer respectively with PLC coder module and PLC analog module communication, described PLC coder module is connected with stay cord encoder, and described PLC analog module is connected with angular transducer.Described PLC coder module and PLC analog module respectively two, described stay cord encoder is two, and described angular transducer is two.
2 PLC Analog input mModule and 2 PLC coder module are installed in switch board, are connected with left and right arms swinging sensor and left and right stay cord encoder respectively by controlling cable.
The acquisition method of a kind of stretch bending machine loft data, comprises the steps:
(1) utilize PLC coder module and PLC analog module that the displacement of stay cord and the position data of arm pendulum are acquired；
(2) arm pendulum often moves one section of angle to the station acquisition of the displacement of stay cord and arm pendulum once；
(3) by scale conversion, the digital value of PLC coder module and PLC analog module collection is converted to actual value；
(4) arm pendulum position step (3) changed and stay cord displacement actual value show on host computer.
Step (3) can be passed through software and adjust gain and the biasing of scale conversion, makes actual value more accurate.When sensor uses for the first time, we need it is carried out linear calibration, such as recorded by external perimysium reference measurer when the length that stretching cylinder stretches out is changed to 10mm(by 2mm herein) time, sensing data changes to 4000 from 3000, so can showing that the physical length that each variable quantity of sensor is corresponding is (10-2)/(4000-3000)=0.008mm, 0.008 is exactly yield value herein；And 2-(3000 × 0.008)=-22 ,-22 it is bias herein；We only need to can draw gain accurately and biasing according to field condition in practice.
Coder module is incremental, and analog module digital input signals is 16 Differential Input.
Arm pendulum often mobile one section of angle is 0.6o-2o.
Suddenly (4) are distributed by address, and host computer will read the data of PLC coder module and PLC analog module, and sets up the data that form display gathers in host computer.
Concrete way is: the fulcrum central spot at stretching cylinder has two stay cord encoders.Elastic stay cord pulls out in pulley, surround die surface and fixing on the table with steady pin, it is actually the action simulating forming parts with stay cord, when big arm swing, elastic stay cord grinding tool of fitting stretches or shrinks, and needs the amount of tension compensated, it is necessary to collection is the data of stay cord encoder when this amount of tension is forming parts, by this market demand in forming parts process, as the Motion trajectory of stretching cylinder.When large arm pendulum angle often increases by 0.6 °, just gather the data value of once current stay cord encoder, and form data queue.With large arm angle for abscissa, stay cord encoder data value is the relative position relation curve that vertical coordinate can obtain large arm and stretching cylinder.
PLC analog module and coder module resolution that Bei Fu company produces have reached 16, and measurement error is only ± 0.05%(full scale), it is highly suitable for stretch bending machine high accuracy control process.Utilize the coder module of Bei Fu company to receive the pulse signal produced by stay cord encoder, produced by analog module KL3162 receiving angle sensor ± 10V voltage signal.And PLC is carried out communication with host computer, the data collected by PLC process on host computer.
Obtained arm swinging and stay cord positional information by hardware module, twincat software carries out programming.The twincatPLC programming software of Bei Fu company provides all language of regulation in IEC61131-3 standard, this programming process not only uses substantial amounts of mathematical calculation, but also by relative program modularity, ST(structured text need to be selected) language carries out programming.
According to experiment, arm pendulum is every 0.6 °-2 ° positions gathering a secondary arm pendulum and stay cord displacement, and part stretch bending best results, the qualification rate of product is the highest.Being because when collection period is less than 0.6 °/time, equipment control accuracy and response speed are required height, gather data and can cause arm pendulum shake in actual applications, the motor control process of forming parts is out of control；When collection period is more than 0.6 °/time, forming parts low precision, do not reach examination requirements.
As shown in Figure 2, flow chart for this program, main design idea is the umber of pulse remembeing angle that arm puts and stay cord before equipment arm pendulum starts, when arm swinging sensor detects that arm pendulum moves 0.6 °, to now arm pendulum position and stay cord displacement be written in corresponding address, after write, sequence number i is added 1 automatically, remember current arm swinging and stay cord position again, so circulation, until arm stops after swinging to reach target location, the relation between arm swinging and stay cord increment thus can be obtained.
According to practical situation, arm pendulum gathers once every 0.6 °, and the moving range of arm pendulum is demarcated between-15 ° to 90 °, then can collect data and be up to (90 °-(-15 °))/0.6 ° of ≈ 191.7, gather at most 191 groups of data.That is maximum 191 groups of the valid data collected, remainder data is invalid, is deleted in the table by invalid data.
Claims (7)
1. the acquisition method of stretch bending machine loft data, it is characterised in that comprise the steps:
(1) utilize PLC coder module and PLC analog module that the displacement of stay cord and the position data of arm pendulum are acquired；
(2) arm pendulum often moves one section of angle to the station acquisition of the displacement of stay cord and arm pendulum once；
(3) by scale conversion, the digital value of PLC coder module and PLC analog module collection is converted to actual value；
(4) arm pendulum position step (3) changed and stay cord displacement actual value show on host computer.
2. the acquisition method of a kind of stretch bending machine loft data according to claim 1, it is characterised in that: described step (3) can be passed through software and adjust gain and the biasing of scale conversion, makes actual value more accurate.
3. the acquisition method of a kind of stretch bending machine loft data according to claim 1, it is characterised in that: described coder module is incremental, and analog module digital input signals is 16 Differential Input.
4. the acquisition method of a kind of stretch bending machine loft data according to claim 1, it is characterised in that: described arm pendulum often mobile one section of angle is 0.6o-2o.
5. the acquisition method of a kind of stretch bending machine loft data according to claim 1, it is characterized in that: described step (3) is distributed by address, host computer will read the data of PLC coder module and PLC analog module, and sets up the data that form display gathers in host computer.
6. the harvester of a kind of stretch bending machine loft data method according to claim 1, it is characterized in that: include host computer, PLC coder module, PLC analog module, stay cord encoder and angular transducer, described host computer respectively with PLC coder module and PLC analog module communication, described PLC coder module is connected with stay cord encoder, and described PLC analog module is connected with angular transducer.
7. the harvester of a kind of stretch bending machine loft data method according to claim 6, it is characterized in that: described PLC coder module and PLC analog module respectively two, described stay cord encoder is two, and described angular transducer is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610180996.8A CN105759711A (en) | 2016-03-28 | 2016-03-28 | Method and device for acquiring mold line data of profile stretch bender |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610180996.8A CN105759711A (en) | 2016-03-28 | 2016-03-28 | Method and device for acquiring mold line data of profile stretch bender |
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| CN105759711A true CN105759711A (en) | 2016-07-13 |
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| CN201610180996.8A Pending CN105759711A (en) | 2016-03-28 | 2016-03-28 | Method and device for acquiring mold line data of profile stretch bender |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101885026A (en) * | 2010-06-25 | 2010-11-17 | 江苏国力锻压机床有限公司 | Unbalanced load protection control system for torque shaft bending machine |
| CN102275093A (en) * | 2011-07-14 | 2011-12-14 | 中国科学院沈阳自动化研究所 | Workpiece measuring system based on five-axis numerical control system |
| CN103042670A (en) * | 2012-12-17 | 2013-04-17 | 宁波弘讯科技股份有限公司 | Automatic data sampling system of elbow injection molding machine |
| CN202877441U (en) * | 2012-11-10 | 2013-04-17 | 建湖县胜飞机械制造有限公司 | Multi-head hoop-bending linkage device of reinforcing steel bar hoop-bending machine |
-
2016
- 2016-03-28 CN CN201610180996.8A patent/CN105759711A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101885026A (en) * | 2010-06-25 | 2010-11-17 | 江苏国力锻压机床有限公司 | Unbalanced load protection control system for torque shaft bending machine |
| CN102275093A (en) * | 2011-07-14 | 2011-12-14 | 中国科学院沈阳自动化研究所 | Workpiece measuring system based on five-axis numerical control system |
| CN202877441U (en) * | 2012-11-10 | 2013-04-17 | 建湖县胜飞机械制造有限公司 | Multi-head hoop-bending linkage device of reinforcing steel bar hoop-bending machine |
| CN103042670A (en) * | 2012-12-17 | 2013-04-17 | 宁波弘讯科技股份有限公司 | Automatic data sampling system of elbow injection molding machine |
Non-Patent Citations (1)
| Title |
|---|
| 周永清: "机械手肋骨冷弯机数字控制系统的研究", 《中国博士学位论文全文数据库 信息科技辑》 * |
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Application publication date: 20160713 |