CN102248697A - Calibration method for air-pressure automatic regulation of press - Google Patents
Calibration method for air-pressure automatic regulation of press Download PDFInfo
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- CN102248697A CN102248697A CN2011100766568A CN201110076656A CN102248697A CN 102248697 A CN102248697 A CN 102248697A CN 2011100766568 A CN2011100766568 A CN 2011100766568A CN 201110076656 A CN201110076656 A CN 201110076656A CN 102248697 A CN102248697 A CN 102248697A
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Abstract
The invention discloses a calibration method for air-pressure automatic regulation of a press, belonging to the technical field of press control. The calibration method comprises the following steps of: firstly setting an air-pressure value range of a pressure sensor with a pressure display function, which is connected to an air reservoir, and inputting a setting signal to a PLC (Programmable Logic Controller) through a man-machine interface; secondly transmitting analog quantity signals of maximum and minimum pressure values displayed on the pressure sensor to the PLC after being subjected to analog-digital conversion; finally calculating a current air pressure value according to the read maximum value and the read minimum value through the PLC and retransmitting the current air pressure value to the man-machine interface for displaying. The calibration for the air-pressure automatic regulation of the press is realized through the calibration method disclosed by the invention in use; and a linear relation of an analog quantity value and a practical pressure value is utilized in the calibration method disclosed by the invention, thus a measured value can be calibrated and corrected through the man-machine interface, an air cylinder of the press and corresponding group valves are ensured to work in a safety range and the use reliability of the press is improved.
Description
Technical field
The present invention relates to forcing press control system technical field, the scaling method that particularly a kind of forcing press air pressure is adjusted.
Background technology
Realizing the self-adjusting device of air pressure at forcing press at present, generally comprise a pressure sensor, pressure sensor is used to survey the pressure of air accumulator, pressure sensor is converted into analog signals with pressure signal and sends to PLC, after PLC receives the analog signals that pressure sensor sends, by calculating current atmospheric pressure value, and compare with the pressure size that operating personnel set on man-machine interface, control the break-make of intake valve and air outlet valve then, make the pressure of air accumulator maintain between the force value of setting.Usually PLC is installed in the regulator cubicle, and pressure sensor is installed near the pipeline control of fuselage usually, so the distance of the two is generally far away.Along with the increase of service time, circuit aging, the force value that Programmable Logic Controller PLC reads can not be inconsistent with the force value that pressure sensor shows.At this moment, will influence lathe uses.
Traditional solution is: operating personnel observe the current pressure that shows earlier on man-machine interface, and then observe the current pressure that pressure sensor shows, by the air pressure value of setting on the heavier new settings man-machine interface.Do not only trouble like this, and set mistake easily, product quality is exerted an influence, will cause the damage of forcing press when serious.
Summary of the invention
The purpose of this invention is to provide the self-adjusting scaling method of a kind of forcing press air pressure,, make forcing press air pressure can realize adjusting automatically to overcome the deficiency that current pressure can't accurately not adjusted on time.
The object of the present invention is achieved like this: the self-adjusting scaling method of a kind of forcing press air pressure is characterized in that comprising the steps:
1) set the atmospheric pressure value scope of the pressure sensor that the band pressure be connected to air accumulator shows, wherein maximum is A1, and minimum of a value is A2; Simultaneously, this setting signal is inputed to PLC by man-machine interface;
2) intake valve of unlatching air accumulator is inflated in air accumulator, closes intake valve when the maximum pressure value of pressure sensor display setting, at this moment, the analog signals of pressure sensor passes to PLC after analog-to-digital conversion, read maximum D2 in the corresponding air pressure range by PLC;
3) air outlet valve of unlatching air accumulator, exhaust outside air accumulator is closed air outlet valve when the minimum pressure values of pressure sensor display setting, the analog signals of pressure sensor is after analog-to-digital conversion, pass to PLC, read minimum of a value D1 in the corresponding air pressure range by PLC;
4) air pressure is demarcated again: open intake valve and air outlet valve, when the forcing press real work, PLC is according to above-mentioned steps 2) and 3) maximum and the minimum of a value that are read calculate current atmospheric pressure value, ÷ (the D2-D1), after the PLC computing current pressure value signal is sent to man-machine interface and shows of the digital quantity value that current atmospheric pressure value=current PLC reads * (A1-A2).
When the present invention works, realize the self-adjusting demarcation of forcing press air pressure by the present invention, it utilizes the linear relationship of analog value and actual pressure value, can demarcate correction to measured value by man-machine interface, guaranteed that forcing press cylinder and corresponding valve group are operated in the safe range, have improved the dependability of forcing press.
Description of drawings
Fig. 1 is a fundamental diagram of the present invention.
The specific embodiment
As shown in Figure 1, be fundamental diagram of the present invention, the self-adjusting scaling method of a kind of forcing press air pressure that it provides comprises the steps:
1) set the atmospheric pressure value scope of the pressure sensor that the band pressure be connected to air accumulator shows, wherein maximum is A1, and minimum of a value is A2; Simultaneously, this setting signal is inputed to PLC by man-machine interface; In maximum of setting and minimum of a value scope, forcing press cylinder and related valves group can be at trouble free services;
2) intake valve of unlatching air accumulator is inflated in air accumulator, closes intake valve when the maximum pressure value of pressure sensor display setting, at this moment, the analog signals of pressure sensor passes to PLC after analog-to-digital conversion, read maximum D2 in the corresponding air pressure range by PLC;
3) air outlet valve of unlatching air accumulator, exhaust outside air accumulator is closed air outlet valve when the minimum pressure values of pressure sensor display setting, the analog signals of pressure sensor is after analog-to-digital conversion, pass to PLC, read minimum of a value D1 in the corresponding air pressure range by PLC;
4) air pressure is demarcated again: open intake valve and air outlet valve, when the forcing press real work, PLC is according to above-mentioned steps 2) and 3) maximum and the minimum of a value that are read calculate current atmospheric pressure value, ÷ (the D2-D1), after the PLC computing current pressure value signal is sent to man-machine interface and shows of the digital quantity value that current atmospheric pressure value=current PLC reads * (A1-A2).
Among the present invention, the detection range of supposing pressure sensor is 0Mpa-0.9Mpa, analog quantity is output as DC1V-DC5V, resolution ratio is 4000, the air pressure setting range is 0.1Mpa-0.4Mpa, through calculating, the analog quantity voltage that corresponding PLC receives should be 1.44V-2.78V, and corresponding digital quantity value should be 444-1777.
The digital quantity value of the A/D conversion that PLC record when the air pressure that pressure sensor shows is 0.1Mpa is current is D1, the digital quantity value that writes down current A/D conversion when the air pressure that pressure sensor shows is 0.4Mpa is D2, and corresponding new computing formula is: and the ÷ of the digital quantity value that the current pressure value=current Programmable Logic Controller PLC reads * (0.4Mpa-0.1Mpa) (D2-D1).
The present invention is not limited to the foregoing description; on the basis of technical scheme disclosed by the invention; those skilled in the art is according to disclosed technology contents; do not need performing creative labour just can make some replacements and distortion to some technical characterictics wherein, these replacements and distortion are all in protection scope of the present invention.
Claims (1)
1. the self-adjusting scaling method of forcing press air pressure is characterized in that comprising the steps:
1) set the atmospheric pressure value scope of the pressure sensor that the band pressure be connected to air accumulator shows, wherein maximum is A1, and minimum of a value is A2; Simultaneously, this setting signal is inputed to PLC by man-machine interface;
2) intake valve of unlatching air accumulator is inflated in air accumulator, closes intake valve when the maximum pressure value of pressure sensor display setting, at this moment, the analog signals of pressure sensor passes to PLC after analog-to-digital conversion, read maximum D2 in the corresponding air pressure range by PLC;
3) air outlet valve of unlatching air accumulator, exhaust outside air accumulator is closed air outlet valve when the minimum pressure values of pressure sensor display setting, the analog signals of pressure sensor is after analog-to-digital conversion, pass to PLC, read minimum of a value D1 in the corresponding air pressure range by PLC;
4) air pressure is demarcated again: open intake valve and air outlet valve, when the forcing press real work, PLC is according to above-mentioned steps 2) and 3) maximum and the minimum of a value that are read calculate current atmospheric pressure value, ÷ (the D2-D1), after the PLC computing current pressure value signal is sent to man-machine interface and shows of the digital quantity value that current atmospheric pressure value=current PLC reads * (A1-A2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100766568A CN102248697A (en) | 2011-03-29 | 2011-03-29 | Calibration method for air-pressure automatic regulation of press |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100766568A CN102248697A (en) | 2011-03-29 | 2011-03-29 | Calibration method for air-pressure automatic regulation of press |
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| CN102248697A true CN102248697A (en) | 2011-11-23 |
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| CN2011100766568A Pending CN102248697A (en) | 2011-03-29 | 2011-03-29 | Calibration method for air-pressure automatic regulation of press |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104487236A (en) * | 2012-07-11 | 2015-04-01 | 大众汽车有限公司 | Testing tool for determining the properties of a forming press under actual conditions |
| CN105922559A (en) * | 2016-06-21 | 2016-09-07 | 苏州赛腾精密电子股份有限公司 | Pneumatic type press-fitting device |
| CN107165889A (en) * | 2016-03-08 | 2017-09-15 | 胡斯可国际股份有限公司 | The system and method calibrated for electro-hydraulic valve |
| CN111391660A (en) * | 2020-03-31 | 2020-07-10 | 潍柴动力股份有限公司 | Method and device for detecting pressure of gas storage cylinder and engine |
| CN111721562A (en) * | 2020-06-05 | 2020-09-29 | 扬力集团股份有限公司 | Energy testing device for press |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0379607A (en) * | 1985-05-23 | 1991-04-04 | Marathon Oil Co | Manufacture of polyacrylic amide solution |
| US5224053A (en) * | 1991-01-22 | 1993-06-29 | Dayton Reliable Tool & Mfg. Co. | Interactive control for can end systems |
-
2011
- 2011-03-29 CN CN2011100766568A patent/CN102248697A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0379607A (en) * | 1985-05-23 | 1991-04-04 | Marathon Oil Co | Manufacture of polyacrylic amide solution |
| US5224053A (en) * | 1991-01-22 | 1993-06-29 | Dayton Reliable Tool & Mfg. Co. | Interactive control for can end systems |
Non-Patent Citations (1)
| Title |
|---|
| 刘大庆等: "基于PT及PLC的气压自动控制系统在压力机上的应用", 《第五届全国设备维修与改造学术会议》, 31 December 2002 (2002-12-31), pages 153 - 157 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104487236A (en) * | 2012-07-11 | 2015-04-01 | 大众汽车有限公司 | Testing tool for determining the properties of a forming press under actual conditions |
| CN107165889A (en) * | 2016-03-08 | 2017-09-15 | 胡斯可国际股份有限公司 | The system and method calibrated for electro-hydraulic valve |
| CN105922559A (en) * | 2016-06-21 | 2016-09-07 | 苏州赛腾精密电子股份有限公司 | Pneumatic type press-fitting device |
| CN111391660A (en) * | 2020-03-31 | 2020-07-10 | 潍柴动力股份有限公司 | Method and device for detecting pressure of gas storage cylinder and engine |
| CN111721562A (en) * | 2020-06-05 | 2020-09-29 | 扬力集团股份有限公司 | Energy testing device for press |
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Application publication date: 20111123 |