CN101367273B - Intellectualized failure recovery method and device for liquid filling and shaping hydraulic press for sheet material - Google Patents
Intellectualized failure recovery method and device for liquid filling and shaping hydraulic press for sheet material Download PDFInfo
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- CN101367273B CN101367273B CN2008100293350A CN200810029335A CN101367273B CN 101367273 B CN101367273 B CN 101367273B CN 2008100293350 A CN2008100293350 A CN 2008100293350A CN 200810029335 A CN200810029335 A CN 200810029335A CN 101367273 B CN101367273 B CN 101367273B
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Abstract
The invention provides an intelligent method and a device for removing faults, which is used for plate liquid-filled forming hydraulic presses. The device is characterized in that a pressure sensor is arranged in a liquid chamber; when a hydraulic press draws a plate, the pressure of the liquid chamber is detected through the pressure sensor; during a deep-drawing work stage under normal conditions, the pressure of the liquid chamber in a next period is definitely higher than or equal to that in a previous period; only when the plate breaks, the pressure of the liquid chamber is caused to decrease suddenly, which causes the pressure of the liquid chamber in the next period is lower than that in the previous period; and when the absolute value of a pressure difference is more than a set value, a system can judge the plate to be broken and remove break faults by controlling the hydraulic press to stop automatic operation. Compared with the prior art, the invention has the advantages that the device for removing faults can diagnose the wrinkling or break faults in real time and automatically remove the faults in time, and is safe and reliable to use.
Description
Technical field
The invention belongs to the control technology field of hydraulic press, particularly a kind of intelligentized fault real-time diagnosis and troubleshooting methodology and device that is used for the sheet material liquid-filling shaping hydraulic machine.
Technical background
Sheet material liquid-filling shaping body is as the power transmission medium, makes the sheet material mould that reclines under the effect of power transmission pressure medium, and the realization technology is a kind of new sheet material forming technology.It is the shaping with superelevation hydraulic fluid sheet material.The product size precision height, the surface quality that adopt this technology to produce are good, and the product mechanical performance significantly improves.But in sheet material liquid-filling shaping process, if pressure, speed, that displacement parameter is provided with is improper, sheet material tends to occur serious break or wrinkling.When sheet material broke, the energy that superhigh pressure liquid gathered can cause bigger shock and vibration in abrupt release, badly influences the safety of operator and machine.Break or wrinkling plate and punch and the liquid chamber die surface generation serious friction of also can making, not only influence the quality of pull and stretch part, and it is stuck at liquid chamber or major injury punch-die to occur sheet material sometimes.
Summary of the invention:
The object of the present invention is to provide a kind of can real-time diagnosis takes place break or wrinkling failure and can in time get rid of the intelligentized troubleshooting methodology and the device that are used for the sheet material liquid-filling shaping hydraulic machine of above-mentioned fault automatically.
The intelligentized troubleshooting methodology that is used for the sheet material liquid-filling shaping hydraulic machine of the present invention is to realize like this, pressure sensor is set in liquid chamber, when hydraulic press carries out the pull and stretch of sheet material, the pressure of liquid chamber detects by pressure sensor, under the normal condition, at the drawing process active section, the liquid chamber pressure of next period is necessarily more than or equal to the liquid chamber pressure of a last period, when having only sheet material to break, the pressure of liquid chamber is descended suddenly, caused the liquid chamber pressure of the liquid chamber pressure of next period less than a last period, when the absolute value of this pressure differential during greater than setting value, system can judge that promptly sheet material breaks, and stops to move automatically realizing the troubleshooting of faults of breaking by the control hydraulic press.
The stiff end of displacement transducer is fixed on the liquid chamber, its movable end is fixed on the blankholder slide, when hydraulic press carries out the pull and stretch of sheet material, the relative displacement of liquid chamber and blankholder slide detects by displacement transducer, under the normal condition, at the drawing process active section, the displacement of next period necessarily is less than or equal to the displacement of a period, when having only sheet material wrinkling, make on the blankholder slide and move, caused the displacement of next period, when the absolute value of this displacement difference during greater than setting value greater than the displacement of a last period, system can judge that promptly sheet material is wrinkling, and stops the eliminating that operation automatically realizes wrinkling failure by the control hydraulic press.
The intelligentized fault remover that is used for the sheet material liquid-filling shaping hydraulic machine of the present invention is to realize like this, the structure of the sheet material liquid-filling shaping hydraulic machine that this device is used comprises underbeam, be arranged on the column on the underbeam, be arranged on the upper beam on the column, be slidingly connected at the stretching beam on the column, be arranged on the coaxial coordinated type pull and stretch flange fixing installation below the stretching beam, be arranged on the compound master cylinder of the coaxial coordinated type pull and stretch of the drive flange fixing installation action on the upper beam, be arranged on the liquid chamber on the underbeam, the bearing fuel tank, the hydraulic power control system, booster, its special feature is to be provided with pressure sensor and corresponding micro computer electronics control device in liquid chamber, the signal of telecommunication output of pressure sensor links to each other with the signal of telecommunication input of micro computer electronics control device, and the signal of telecommunication output of micro computer electronics control device links to each other with the signal of telecommunication input of hydraulic power control system.During work, when hydraulic press carries out the pull and stretch of sheet material, the pressure of liquid chamber detects by pressure sensor, under the normal condition, at the drawing process active section, the liquid chamber pressure of next period is necessarily more than or equal to the liquid chamber pressure of a last period, when having only sheet material to break, the pressure of liquid chamber is descended suddenly, caused the liquid chamber pressure of next period less than the liquid chamber pressure of a last period, when the absolute value of this pressure differential during greater than setting value, micro computer electronics control device can judge that promptly sheet material breaks, and, realize the troubleshooting of faults of breaking by stopping automatic operation to hydraulic power control system output one control signal of telecommunication control hydraulic press.
Between liquid chamber and blankholder slide, be provided with displacement transducer, the stiff end of displacement transducer is fixed on the liquid chamber, its movable end is fixed on the blankholder slide of coaxial coordinated type pull and stretch flange fixing installation, the signal of telecommunication output of displacement transducer links to each other with the signal of telecommunication input of micro computer electronics control device, and the signal of telecommunication output of micro computer electronics control device links to each other with the signal of telecommunication input of hydraulic power control system.During work, under the normal condition, at the drawing process active section, the displacement of next period necessarily is less than or equal to the displacement of a period, when having only sheet material wrinkling, make on the blankholder slide and move, caused the displacement of the displacement of next period greater than a last period, when the absolute value of this displacement difference during greater than setting value, micro computer electronics control device can judge that promptly sheet material is wrinkling, and, realize the eliminating of wrinkling failure by stopping automatic operation to hydraulic power control system output one control signal of telecommunication control hydraulic press.
The present invention compared with the prior art, owing to be provided with pressure sensor, displacement transducer and corresponding micro computer electronics control device, therefore, have can real-time diagnosis took place wrinkling or the fault and can in time get rid of above-mentioned fault, safe and reliable advantage automatically of breaking.
Description of drawings:
Fig. 1 is the structural representation of the used sheet material liquid-filling shaping hydraulic machine of the present invention;
Fig. 2 is the pressure sensor of fault remover of the present invention and the partial schematic diagram of displacement transducer part;
Fig. 3 is a circuit controling drawing of the present invention.
The specific embodiment:
The intelligentized troubleshooting methodology that is used for the sheet material liquid-filling shaping hydraulic machine of the present invention is to realize like this, pressure sensor is set in liquid chamber, when hydraulic press carries out the pull and stretch of sheet material, the pressure of liquid chamber detects by pressure sensor, under the normal condition, at the drawing process active section, the liquid chamber pressure of next period is necessarily more than or equal to the liquid chamber pressure of a last period, when having only sheet material to break, the pressure of liquid chamber is descended suddenly, caused the liquid chamber pressure of the liquid chamber pressure of next period less than a last period, when the absolute value of this pressure differential during greater than setting value, system can judge that promptly sheet material breaks, and stops to move automatically realizing the troubleshooting of faults of breaking by the control hydraulic press.
The stiff end of displacement transducer is fixed on the liquid chamber, its movable end is fixed on the blankholder slide of coaxial coordinated type pull and stretch flange fixing installation, when hydraulic press carries out the pull and stretch of sheet material, the relative displacement of liquid chamber and blankholder slide detects by displacement transducer, under the normal condition, at the drawing process active section, the displacement of next period necessarily is less than or equal to the displacement of a period, when having only sheet material wrinkling, make on the blankholder slide and move, caused the displacement of next period, when the absolute value of this displacement difference during greater than setting value greater than the displacement of a last period, system can judge that promptly sheet material is wrinkling, and stops the eliminating that operation automatically realizes wrinkling failure by the control hydraulic press.
The intelligentized fault remover that is used for the sheet material liquid-filling shaping hydraulic machine of the present invention is to realize like this, the structure of the sheet material liquid-filling shaping hydraulic machine that this device is used comprises underbeam 3, be arranged on the column 5 on the underbeam 3, be arranged on the upper beam 9 on the column 5, be slidingly connected at the stretching beam 7 on the column 5, be arranged on the compound master cylinder 8 on the upper beam 9, be arranged on the coaxial coordinated type pull and stretch flange fixing installation 6 below the stretching beam 7, be arranged on the liquid chamber 4 on the underbeam 3, bearing fuel tank 2 (comprising the hydraulic power control system), booster 1, upright nut 10, topping up case 11, pipeline 12, underbeam 3, column 5, put the beams in place and 9 to connect and compose a rigid body by upright nut 10.Coaxial coordinated type pull and stretch flange fixing installation 6 is by being fixed on pull and stretch slide block 13 on the stretching beam 7, coaxially being slidingly connected on the pull and stretch slide block 13 and the blankholder slide 14 that links to each other with the built-in flanging cylinder piston of compound master cylinder 8, the punch 17 that is fixed on the pull and stretch slide block 13 constitute, and liquid chamber 4 and booster 1 link to each other by pressure duct.Its special feature is to be provided with displacement transducer 15 and corresponding micro computer electronics control device 19 at liquid chamber 4 and 14 of blankholder slides, the stiff end 15a of displacement transducer 15 is fixed on the liquid chamber 4, its movable end 15b is fixed on the blankholder slide 14, can slide relatively between the two.The signal of telecommunication output of displacement transducer 15 links to each other with the signal of telecommunication input of micro computer electronics control device 19, and the signal of telecommunication output of micro computer electronics control device 19 links to each other with the signal of telecommunication input of hydraulic power control system 20.Pressure sensor 16 is set in liquid chamber 4, and the signal of telecommunication output of pressure sensor 16 links to each other with the signal of telecommunication input of micro computer electronics control device 19, and the signal of telecommunication output of micro computer electronics control device 19 links to each other with the signal of telecommunication input of hydraulic power control system 20.
The device working procedure is as follows:
1) pressure sensor 16 detects the pressure of liquid chamber 4 and exports to micro computer electronics control device 19.
2) in drawing process, the pressure signal of 19 pairs of inputs of micro computer electronics control device is by analyzing comparison the blanking time that equates, the poor Δ Pi of the pressure P i-1 that detects when current pressure Pi and leading portion for just or for bearing but absolute value when setting value Δ, micro computer electronics control device 19 control systems keep normal pull and stretch.
3) in drawing process, the pressure signal of 19 pairs of inputs of micro computer electronics control device is by analyzing comparison the blanking time that equates, the poor Δ Pi of the pressure P i-1 that detects when current pressure Pi and leading portion is for negative and absolute value during greater than the value Δ of setting, micro computer electronics control device 19 senders stop automatic operation by hydraulic power control system 20 control hydraulic presses.
4) in drawing process, as long as the poor Δ Pi of the pressure P i-1 that not current pressure P i and leading portion detect is the negative and absolute value value Δ greater than setting, the time interval that micro computer electronics control device 19 continues in accordance with regulations, the pressure signal of the liquid chamber 4 that pressure sensor 16 is detected carries out real-time analysis relatively by said process, and, stop operation automatically or continue operation automatically by hydraulic power control system 20 control hydraulic presses according to result relatively.
5) displacement transducer 15 detects the displacement of blankholder slide 14 and exports to micro computer electronics control device 19.
6) in drawing process, the displacement signal of 19 pairs of inputs of micro computer electronics control device is by analyzing comparison the blanking time that equates, the poor Δ Si of the displacement Si-1 that detects when current displacement Si and leading portion for negative or for just but absolute value when setting value Δ, micro computer electronics control device 19 control systems keep normal pull and stretch.
7) in drawing process, the displacement signal of 19 pairs of inputs of micro computer electronics control device is by analyzing comparison the blanking time that equates, the poor Δ Si of the displacement Si-1 that detects when current displacement Si and leading portion for just and absolute value when setting value Δ, micro computer electronics control device 19 senders stop automatic operation by hydraulic power control system 20 control hydraulic presses.
8) in drawing process, as long as not the present bit poor Δ Si that moves the displacement Si-1 that Si and leading portion detect for just and absolute value greater than the value Δ of setting, the time interval that micro computer electronics control device 19 continues in accordance with regulations, the liquid chamber 4 of displacement transducer 15 detections and the displacement signal of blankholder slide 14 are carried out real-time analysis relatively by said process, and, stop operation automatically or continue operation automatically by hydraulic power control system 20 control hydraulic presses according to result relatively.
Technique effect of the present invention is: pass through use of the present invention at plate liquid-filling shaping hydraulic, can detect in real time, feed back and judge intelligently and break and wrinkling failure, make machine stop to realize the eliminating of fault, to avoid dangerous generation, make hydraulic press have high security, stability and reliability. By to breaking and real-time diagnosis and the eliminating of wrinkling failure, can prevent the damage of mould, prolong the service life of mould, reduce the manufacturing cost of mould. By to wrinkling real-time diagnosis and eliminating, can significantly improve the qualification rate of product, guarantee the crudy of product.
Claims (2)
1. intelligentized troubleshooting methodology that is used for the sheet material liquid-filling shaping hydraulic machine, it is characterized in that in liquid chamber, being provided with pressure sensor, when hydraulic press carries out the pull and stretch of sheet material, the pressure of liquid chamber detects by pressure sensor, under the normal condition, at the drawing process active section, the liquid chamber pressure of next period is necessarily more than or equal to the liquid chamber pressure of a last period, when having only sheet material to break, the pressure of liquid chamber is descended suddenly, caused the liquid chamber pressure of the liquid chamber pressure of next period less than a last period, when the absolute value of this pressure differential during greater than setting value, system can judge that promptly sheet material breaks, and stops to move automatically realizing the troubleshooting of faults of breaking by the control hydraulic press.
2. the intelligentized troubleshooting methodology that is used for the sheet material liquid-filling shaping hydraulic machine according to claim 1, it is characterized in that the stiff end of displacement transducer is fixed on the liquid chamber, its movable end is fixed on the blankholder slide of coaxial coordinated type pull and stretch flange fixing installation, when hydraulic press carries out the pull and stretch of sheet material, the relative displacement of liquid chamber and blankholder slide detects by displacement transducer, under the normal condition, at the drawing process active section, the displacement of next period necessarily is less than or equal to the displacement of a period, when having only sheet material wrinkling, make on the blankholder slide and move, caused the displacement of the displacement of next period greater than a last period, when the absolute value of this displacement difference during greater than setting value, system can judge that promptly sheet material is wrinkling, and stops the eliminating that operation automatically realizes wrinkling failure by the control hydraulic press.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100293350A CN101367273B (en) | 2008-07-04 | 2008-07-04 | Intellectualized failure recovery method and device for liquid filling and shaping hydraulic press for sheet material |
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| CN2008100293350A CN101367273B (en) | 2008-07-04 | 2008-07-04 | Intellectualized failure recovery method and device for liquid filling and shaping hydraulic press for sheet material |
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| CN101367273A CN101367273A (en) | 2009-02-18 |
| CN101367273B true CN101367273B (en) | 2011-06-08 |
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| CN106273643A (en) * | 2016-08-29 | 2017-01-04 | 天津市天锻压力机有限公司 | Board-like liquid-filling shaping part ruptures intelligent checking system and method |
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