CN102529149A - Method and device for detecting operating safety state of slider of press - Google Patents
Method and device for detecting operating safety state of slider of press Download PDFInfo
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- CN102529149A CN102529149A CN2012100567342A CN201210056734A CN102529149A CN 102529149 A CN102529149 A CN 102529149A CN 2012100567342 A CN2012100567342 A CN 2012100567342A CN 201210056734 A CN201210056734 A CN 201210056734A CN 102529149 A CN102529149 A CN 102529149A
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Abstract
The invention discloses a device for detecting the operating safety state of a slider of a press. The press comprises a press frame, a press slider and a driving mechanism. The invention is characterized in that the detecting device comprises a detecting circuit, a mechanical cam and an electrical cam; the mechanical cam and the electrical cam are connected with the driving mechanism through different transmission mechanisms; and the signal collection end and the position detection point of the detecting circuit are both connected with the electrical cam. The detecting method comprises the following steps of: (a) setting the two cams to have the same motion state as the slider; (b) setting single return, anti-repetition and repeated detection prevention regions; (c) setting the same state inputs; (d) performing logic exclusive-or operation on the two cams; and (e) controlling outputs of the press. The detection device and the detection method can judge failure in time when either cam is in a fault of slippage, shaft breaking or rotation blockage and when the mechanical cam is off-line or in a short-circuit fault, and can stop the slider in time.
Description
Technical field
The present invention relates to a kind of press ram security of operation condition detection method and device, in particular, relate in particular to a kind of press ram security of operation condition detection method and device that is provided with mechanical cam and electric cam simultaneously.
Background technology
In the control of the electric double loop of forcing press, the electric cam data are easy to gathered, and through the signal pause etc., can in time judge its fault; But mechanical cam is a pure mechanical contact signal, and other reason if line short circuit, cam stall skid etc. then is difficult to judge its fault.Thereby possibly cause automatic machinery human arm and press ram interference and collision; And forcing press connects towards phenomenon during artificial feeding, equipment or operating personnel is caused the loss that is difficult to remedy, so this problem is badly in need of solution.
Summary of the invention
The present invention provides a kind of press ram security of operation condition detection method and device that is provided with mechanical cam and electric cam simultaneously in order to overcome the shortcoming of above-mentioned technical problem.
Press ram security of operation condition checkout gear of the present invention; Said forcing press comprises hydropress frame, realizes the press ram of punching press function and the driving mechanism that orders about the press ram operation; Its special feature is: mechanical cam and electric cam that checkout gear comprises testing circuit and is used to characterize the press ram running status, and mechanical cam is connected with driving mechanism through different transmission mechanisms with electric cam; Mechanical cam is provided with a plurality of position detection points that are used to detect angular displacement of the cam, and the signals collecting end of said testing circuit all is connected with electric cam with position detection point.Driving mechanism is realized the driving to press ram; Mechanical cam detects through the running status of different transmission mechanisms to press ram with electric cam, makes irrelevant the disturbing of detection data of mechanical cam and electric cam, so that realize mutual restriction, the detection that pins down each other; Testing circuit detects and computing the status signal of mechanical cam and electric cam, through the uniformity of two cams operation is judged whether the slide block of forcing press moves normally.
Press ram security of operation condition checkout gear of the present invention, the position detection point on the said mechanical cam is 4～12.The quantity of position detection point is chosen according to actual needs.
Press ram security of operation condition detection method of the present invention, its special feature is, may further comprise the steps: a. is provided with synchronously, establishes press ram and accomplishes towards part bottom by topmost moving to, is a complete stroke by moving to topmost bottom again; In a complete stroke, the angle calibration of mechanical cam and electric cam was 0 ° when press ram was positioned at topmost; Two cams angle calibration of living in was 180 ° when slide block was positioned at least significant end, and when slide block was positioned at topmost once more, the residing angle calibration of two cams was 359 °; Press ram is in a complete stroke motion process, and the angle signal of mechanical cam and electric cam changes in 0～359 ° of scope; B. the zone is set, and in a complete stroke, electric cam and mechanical cam are divided into three zones: 180～330 ° are the single return area, the zone of whether normally returning after the part completion for detected pressures machine slide block; 260～200 ° are anti-repeat region, the zone of secondary punching press in the process of returning, whether occurs for detected pressures machine slide block; 300～240 ° are anti-duplicate detection zone, and whether the zone of secondary punching press sign is arranged for further detected pressures machine slide block; C. setting state makes that electric cam returns at single with mechanical cam, is input in the testing circuit with identical " 0 " or one state in anti-repetition and the anti-duplicate detection zone; D. state computing returns at single, prevents that to two cams the quantity of state of importing in repetition and the anti-duplicate detection zone carries out the logical exclusive-OR computing; E. control output in the steps d, if operation result is " 0 ", is then proceeded to detect; If the result is " 1 ", then export fault-signal, and the controlled pressure machine is out of service.Among the step b, can realize trizonal setting respectively through three wheel sheets of mechanical cam; The zone of electric cam is set, and distinguishes angle through the signal of gathering input and gets final product.Among the step c,, can detect the state of mechanical cam respective regions through the input signal of position detection point; " 0 " of electric cam or the state of " 1 " can be accomplished through program setting.
Press ram security of operation condition detection method of the present invention; Comprise also among the step e that time-delay detects step; Nonequivalence operation result like two cam quantity of states is " 1 "; The 500ms that then delays time detects the nonequivalence operation result of two cam quantity of states again, if be " 1 " once more, then exports fault-signal; If operation result changes " 0 " into, then do not export fault-signal.Because mechanical cam and electric cam can not be in full accord,, can effectively avoid erroneous judgement disconnected through the time-delay of 500ms.
The invention has the beneficial effects as follows: press ram security of operation condition checkout gear of the present invention; Through mechanical cam and electric cam are set; And two cams are connected with drive unit through different transmission mechanisms respectively; The running status that has realized press ram effectively detects, and has avoided single in the past Cam Detection insecurity drawback.Press ram security of operation condition detection method of the present invention; Through mechanical cam and electric cam are divided into different zones; Same area is carried out mark with same logic state, and the synchronizing signal of two cams output is carried out XOR, skidding appears in any one cam, off-axis, stall etc. and mechanical cam goes offline, shorting stub; Can both judge in time that its fault takes place, and in time cut off the slide block operation.
Description of drawings
Fig. 1 is the structural representation of press ram security of operation condition checkout gear of the present invention;
Fig. 2 is mechanical cam and the subregion sketch map of electric cam in complete stroke of press ram;
Fig. 3, Fig. 4 are the ladder diagram that the single return area detects in the detection method of the present invention;
Fig. 5, Fig. 6 are the ladder diagram that anti-repeat region detects in the detection method of the present invention;
Fig. 7, Fig. 8 are the ladder diagram that anti-rechecking zone is detected in the detection method of the present invention;
Fig. 9 is the ladder diagram of detection method among the present invention.
Among the figure: 1 press ram, 2 driving mechanisms, 3 mechanical cams, 4 electric cams.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
As shown in Figure 1, provided the structural representation of press ram security of operation condition checkout gear, it comprises press ram 1, driving mechanism 2, mechanical cam 3, electric cam 4; The driving that driving mechanism 2 is realized press ram 1, the punching press that press ram 1 is realized workpiece.Mechanical cam 3 is connected with the driving mechanism of slide block through different mechanisms respectively with electric cam 4, through the motion state of mechanical cam 3 with electric cam 4, characterizes the running status of press ram 1.
As shown in Figure 2; Provided the subregion sketch map of two cams, be positioned at topmost will accomplish the punching press action time at press ram 1, the angle of definition mechanical cam 3 and electric cam 4 is 0 °; Along with the motion of press ram 1, the angle of mechanical cam 3 and electric cam 4 also increases progressively successively; When slide block moved to bottom, the angle of mechanical cam 3 and electric cam 4 was 180 °; When slide block moved to topmost once more, the angle of two cams was 359 °.Shown 180～330 ° is the single return area, and 260～200 ° are anti-repeat region, and 300～240 ° are anti-duplicate detection zone.
The detection method of said press ram security of operation condition checkout gear, may further comprise the steps: a. is provided with synchronously, establishes press ram and accomplishes towards part bottom by topmost moving to, is a complete stroke by moving to topmost bottom again; In a complete stroke, the angle calibration of mechanical cam (3) and electric cam (4) was 0 ° when press ram was positioned at topmost; Two cams angle calibration of living in was 180 ° when slide block was positioned at least significant end, and when slide block was positioned at topmost once more, the residing angle calibration of two cams was 359 °; Press ram is in a complete stroke motion process, and the angle signal of mechanical cam and electric cam changes in 0～359 ° of scope; B. the zone is set, and in a complete stroke, electric cam and mechanical cam are divided into three zones: 180～330 ° are the single return area, the zone of whether normally returning after the part completion for detected pressures machine slide block; 260～200 ° are anti-repeat region, the zone of secondary punching press in the process of returning, whether occurs for detected pressures machine slide block; 300～240 ° are anti-duplicate detection zone, and whether the zone of secondary punching press sign is arranged for further detected pressures machine slide block; C. setting state makes that electric cam returns at single with mechanical cam, is input in the testing circuit with identical " 0 " or one state in anti-repetition and the anti-duplicate detection zone; D. state computing returns at single, prevents that to two cams the quantity of state of importing in repetition and the anti-duplicate detection zone carries out the logical exclusive-OR computing; E. control output in the steps d, if operation result is " 0 ", is then proceeded to detect; If the result is " 1 ", then export fault-signal, and the controlled pressure machine is out of service.
Time-delay also can being set among the step e detecting step, is " 1 " like the nonequivalence operation result of two cam quantity of states, and the 500ms that then delays time detects the nonequivalence operation result of two cam quantity of states again, if be " 1 " once more, then exports fault-signal; If operation result changes " 0 " into, then do not export fault-signal.
Shown in Fig. 3～9; Provided the programming ladder diagram that single returned, prevented repetition and anti-rechecking zone respectively; Control mode proposed by the invention; Main innovate point is to utilize mechanical cam and electric cam to be divided into three regional perspectives, through the PLC programming mode, and these regional break-make angles of signals collecting.Logical construction distance mode through program: for example in the Figure of description, anti-duplicate detection angle 300-240 degree, mechanical cam control point I43.1 and electric cam are controlled control point M92.4 and are carried out XOR; Single returns detection angles 180-330 degree, and mechanical cam control point I43.2 and electric cam control control point M93.7 carry out XOR; Anti-repetition angle 260-200 degree, mechanical cam control point I43.0 and electric cam control control point M91.0 carry out XOR.The control point of a cam angle degree " leads to ", and the control of the synchronous angle of another cam " non-point " must be disconnected, this just realize between mechanical cam, the electric cam synchronously, and pin down each other.Skidding appears in any one cam, off-axis, stall etc. and mechanical cam goes offline, shorting stub, the control point of causing mechanical cam, electric cam in a certain scope " leading to " simultaneously.If logical 500MS can judge that its fault takes place, cut off the ram travel condition through total interlocking point M70.6, in time stop the slide block operation.
At first, judge mechanical cam, the used regional perspective of electric cam according to slide block control stroke.Utilize acquisition angles signaling points such as PLC-ANALYZER monitoring analysis software or electrographic recording appearance.In strict accordance with the wavy curve of its test angle break-make, debug the angle of proofreading and correct mechanical cam and electric cam the same area.And guarantee angle uniformity, synchronism.Through PLC programmed logic distance function, the situation of ram travel and cam angle degree is judged in monitoring at any time, and arbitrary cam goes wrong, and in time cuts off stroke.
Claims (4)
1. press ram security of operation condition checkout gear; Said forcing press comprises hydropress frame, realizes the press ram (1) of punching press function and the driving mechanism (2) that orders about the press ram operation; It is characterized in that: checkout gear comprises testing circuit and is used to characterize the mechanical cam of press ram running status (3) and electric cam (4) that mechanical cam is connected with driving mechanism through different transmission mechanisms with electric cam; Mechanical cam is provided with a plurality of position detection points that are used to detect angular displacement of the cam, and the signals collecting end of said testing circuit all is connected with electric cam with position detection point.
2. press ram security of operation condition checkout gear according to claim 1 is characterized in that: the position detection point on the said mechanical cam is 4～12.
3. the detection method based on the described press ram security of operation of claim 1 condition checkout gear is characterized in that, may further comprise the steps:
A. be provided with synchronously, establish press ram and accomplish towards part bottom by moving to topmost, be a complete stroke by moving to topmost bottom again; In a complete stroke, the angle calibration of mechanical cam (3) and electric cam (4) was 0 ° when press ram was positioned at topmost; Two cams angle calibration of living in was 180 ° when slide block was positioned at least significant end, and when slide block was positioned at topmost once more, the residing angle calibration of two cams was 359 °; Press ram is in a complete stroke motion process, and the angle signal of mechanical cam and electric cam changes in 0～359 ° of scope;
B. the zone is set, and in a complete stroke, electric cam and mechanical cam are divided into three zones: 180～330 ° are the single return area, the zone of whether normally returning after the part completion for detected pressures machine slide block; 260～200 ° are anti-repeat region, the zone of secondary punching press in the process of returning, whether occurs for detected pressures machine slide block; 300～240 ° are anti-duplicate detection zone, and whether the zone of secondary punching press sign is arranged for further detected pressures machine slide block;
C. setting state makes that electric cam returns at single with mechanical cam, is input in the testing circuit with identical " 0 " or one state in anti-repetition and the anti-duplicate detection zone;
D. state computing returns at single, prevents that to two cams the quantity of state of importing in repetition and the anti-duplicate detection zone carries out the logical exclusive-OR computing;
E. control output in the steps d, if operation result is " 0 ", is then proceeded to detect; If the result is " 1 ", then export fault-signal, and the controlled pressure machine is out of service.
4. press ram security of operation condition detection method according to claim 3; It is characterized in that: comprise also among the step e that time-delay detects step; Nonequivalence operation result like two cam quantity of states is " 1 "; The 500ms that then delays time detects the nonequivalence operation result of two cam quantity of states again, if be " 1 " once more, then exports fault-signal; If operation result changes " 0 " into, then do not export fault-signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100567342A CN102529149A (en) | 2012-03-07 | 2012-03-07 | Method and device for detecting operating safety state of slider of press |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100567342A CN102529149A (en) | 2012-03-07 | 2012-03-07 | Method and device for detecting operating safety state of slider of press |
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| CN102529149A true CN102529149A (en) | 2012-07-04 |
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| CN2012100567342A Pending CN102529149A (en) | 2012-03-07 | 2012-03-07 | Method and device for detecting operating safety state of slider of press |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966832A (en) * | 2012-10-26 | 2013-03-13 | 金丰（中国）机械工业有限公司 | Secondary fall detection device of press and detection method |
| CN104174739A (en) * | 2014-08-01 | 2014-12-03 | 胡勋芳 | Starting and stopping device for punching machine |
| CN109501377A (en) * | 2018-12-27 | 2019-03-22 | 济南二机床集团有限公司 | A kind of press ram off-axis detection device |
| CN110536792A (en) * | 2017-12-21 | 2019-12-03 | 菲博罗有限公司 | Device and method for monitoring wedge-type driving instrument |
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| JPH11169976A (en) * | 1997-12-09 | 1999-06-29 | Aida Eng Ltd | Feed monitor device for press machine |
| CN1727175A (en) * | 2004-12-09 | 2006-02-01 | 南京埃斯顿工业自动化有限公司 | Automatic control system of mechanical press |
| CN2853387Y (en) * | 2005-11-14 | 2007-01-03 | 济南二机床集团有限公司 | Electric control system of press |
| CN201645885U (en) * | 2009-12-25 | 2010-11-24 | 江苏扬力集团有限公司 | Multi-station detection control system for protecting die of press |
| CN201665023U (en) * | 2010-03-09 | 2010-12-08 | 江苏扬力集团有限公司 | Combined type cam control system |
| CN201969819U (en) * | 2010-12-28 | 2011-09-14 | 一重集团大连设计研究院有限公司 | Hot die forging automatic breakdown decoding system |
| CN202439254U (en) * | 2012-03-07 | 2012-09-19 | 济南二机床集团有限公司 | Device for detecting operation safety state of press ram |
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Patent Citations (8)
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| US4298114A (en) * | 1978-12-29 | 1981-11-03 | Kabushiki Kaisha Komatsu Seisakusho | Control circuit for a press |
| JPH11169976A (en) * | 1997-12-09 | 1999-06-29 | Aida Eng Ltd | Feed monitor device for press machine |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102966832A (en) * | 2012-10-26 | 2013-03-13 | 金丰（中国）机械工业有限公司 | Secondary fall detection device of press and detection method |
| CN102966832B (en) * | 2012-10-26 | 2016-01-27 | 金丰（中国）机械工业有限公司 | The detection device that two degree, press machine falls and detecting method |
| CN104174739A (en) * | 2014-08-01 | 2014-12-03 | 胡勋芳 | Starting and stopping device for punching machine |
| CN110536792A (en) * | 2017-12-21 | 2019-12-03 | 菲博罗有限公司 | Device and method for monitoring wedge-type driving instrument |
| CN110536792B (en) * | 2017-12-21 | 2022-02-11 | 菲博罗有限公司 | Device and method for monitoring a wedge drive tool |
| CN109501377A (en) * | 2018-12-27 | 2019-03-22 | 济南二机床集团有限公司 | A kind of press ram off-axis detection device |
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Application publication date: 20120704 |