CN105716921B - A kind of metallographical cutter ladder exploration autostop method - Google Patents
A kind of metallographical cutter ladder exploration autostop method Download PDFInfo
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- CN105716921B CN105716921B CN201610200406.3A CN201610200406A CN105716921B CN 105716921 B CN105716921 B CN 105716921B CN 201610200406 A CN201610200406 A CN 201610200406A CN 105716921 B CN105716921 B CN 105716921B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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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
- G05B19/048—Monitoring; Safety
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- Automation & Control Theory (AREA)
- Automatic Control Of Machine Tools (AREA)
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Abstract
The invention discloses kind of metallographical cutter ladders to sound out an autostop method, and by the measurement of the current of spindle motor, whether the comparison of the current of spindle motor is judged to be cut workpiece and be cut off and final autostop：Its process includes following three steps：（1）Workpiece contact judges；（2）Test is soundd out to judge；（3）Depth is soundd out test and is judged；Feed shaft is controlled to the feed speed cutting of the normal cutting feed speed higher than setting, and detects the variation of spindle motor current in real time, and completion automatic stopping function is controlled according to curent change.The present invention cuts stroke woth no need to which the practical measurement of user is most chopped; cutting machine can by control system to the measurement of the current of spindle motor, compare realization autostop, clipping time can be effectively reduced, improve the degree of automation of equipment; the labor intensity for reducing operating personnel, reduces the waste of the energy.Control method is simple, and DATA REASONING and comparison are accurate.
Description
Technical field
The present invention relates to a kind of autocontrol methods, are exactly a kind of metallographical cutter ladder exploration autostop sides
Method.
Background technology
Conventional metallographic automatic gas cutting machine can be needed according to the feed speed automatic cutting workpiece of setting after cutting off workpiece
Stop signal is artificially sent out to controller by stop button, such working method can not free sample preparation teacher completely.
Although the fully automatic cutting machine of country's metallographical cutter supplier designs can cut stroke by setting and realize at present
Equipment automatic shutdown function, but equipment downtime is not smart enough, and also the setting for cutting travel parameters needs to carry out in fact workpiece
Border measure, such as by cutting workpiece be an irregular material when, the distance between line segment L be it is most chopped cut stroke, such as Fig. 1 B
Point position is the farthest point of entire workpiece, i.e., only B points are cut off rear entire workpiece and could be cut off, and A points are in such as figure two
The farthest point of entire workpiece.Can be found that if setting maximum cutting stroke by the two real cases need to find by
The farthest point of workpiece is cut, even and if can accurately find farthest point when workpiece is fixed on the table after, between measurement L
Distance be also very inconvenient.Seldom user is practical go to measure it is most chopped cut stroke, but estimate that setting one is quite big
Cutting stroke be not cut off with regard to autostop to avoid workpiece, clipping time will be increased instead in this way, cause resource
Waste.
Invention content
The technical problem to be solved by the present invention is to.
In order to solve the above technical problems, the present invention uses following technological means：
A kind of metallographical cutter ladder exploration autostop method, includes the measurement of the current of spindle motor, spindle motor current
Compare, including following three steps：
（1）Workpiece contact judges：In cutting process, the current of spindle motor is measured, when the current of spindle motor continues
Higher than pick-up current, that is, judge that cutting sheet has been touched by cutting workpiece；
（2）Test is soundd out to judge：Workpiece contact judges to be confirmed, and continues to monitor the current of spindle motor, when main shaft electricity
Less than after shutting down and judging electric current, feed shaft is controlled to sound out speed for the first time and feeds exploration distance for the first time electromechanics stream, and supervises in real time
It surveys whether the current of spindle motor judges electric current higher than shutting down, if the current of spindle motor judges electric current and lasting higher than shutting down, sentences
Break and do not cut through for cutting workpiece, terminate and shut down judgement, returns to normal cutting flow and continue to cut workpiece；If on the contrary, main
Spindle motor electric current be not above shutdown judge electric current or it is of short duration be more than shut down judge electric current but without continue, then into depth examination
Detection examination；
（3）Depth is soundd out test and is judged：
It controls feed shaft and feed speed feeding depth exploration distance is soundd out with depth, and detect the current of spindle motor in real time
Variation is judged as that workpiece is not switched off if the current of spindle motor is more than to shut down to judge electric current and continue, and returns to normal cutting
Flow continues to cut workpiece；If on the contrary, the current of spindle motor be not above shutdown judge electric current or it is of short duration be more than shut down judgement
It electric current but does not maintain, is then judged as that workpiece is completed by cutting, exit shutdown detection completion automatic stopping function.
Pick-up current：Electric current when the rigid contact workpiece of cutting sheet.
Shutdown judges electric current：Be less than pick-up current higher than no-load current, the data because of spindle motor power difference not
Together, the parameter can be determined according to field test；In the parameters setting process, need to reduce if frequently executing and shutting down test
The parameter setting.
It is first to sound out speed：The feed speed of feed shaft when souning out cutting for the first time.
It is first to sound out distance：The displacement of feed shaft walking when souning out cutting for the first time.
Depth sounds out feed speed：In one judges the period, carries out after souning out test judgement, sound out and test into depth
Second of feed speed for souning out feed shaft when cutting when judgement.
Depth sounds out distance：It is corresponding with depth exploration feed speed, in one judges the period, sound out testing and sentence
It has no progeny, when judging into depth exploration test, sounds out the displacement that feed shaft is walked when cutting for the second time.
Realize that the method for above-mentioned current monitoring can be in different platforms（Such as ABB frequency converters, Schneider PLC）With not
Same means read the current of spindle motor, can such as pass through Modbus communications protocol and read the present all inverter current numbers in market
According to also the current of spindle motor can be directly read by current sensor.
The metallographical cutter ladder of the present invention sounds out autostop method, and main shaft electricity is monitored by increasing feed speed twice
Machine curent change judges halt condition, which includes three phases or process：Workpiece contact judges, sounds out to test and sentence
Disconnected, depth is soundd out test and is judged.First stage is second stage, the condition of phase III execution judgement, and second-order is third rank
Section basis, the phase III is the supplement of second stage.
Wherein, the first stage be after just starting automatic cutting in order to prevent saw blade due to being touched not yet by cutting workpiece
The erroneous judgement of generation；The feed speed for souning out testing setup is slightly faster than normal cutting feed speed, and cutting displacement is small, in this way
It can prevent the big cutting stress that too fast feed speed generates from causing the cut surface of cutting sheet disintegrating tablet and workpiece of burning and first
Step judges whether workpiece is cut off.Judge if contacted without workpiece, directly works as quilt with the cutting test of faster feed speed
Cutting workpiece can be because moment increase feed speed can generate prodigious cutting stress on saw blade and cause to collapse when being not cut off
Piece, and too fast feed speed can burn the cut surface of workpiece.In most cases when workpiece is not cut off, main shaft is cut
Current of electric can increase because of cutting feed speed is increased, however not excluded that when the cutting area of workpiece is small or when workpiece will be by
When cut-out, increase a small amount of feed speed, the situation that the curent change of spindle motor is little is led to prevent controller erroneous judgement
After crossing exploration test, it is also necessary to carry out more reliable depth and sound out test judgement, i.e.,：With faster feed speed walking bigger
Stroke, accordingly even when the cutting area of workpiece is small, spindle motor current, which also has apparent change, allows controller to capture, although and
Feed speed not will produce big cutting stress considerably beyond normal cutting feed speed, but because cutting area is small.
Beneficial effects of the present invention：
（1）Stroke is cut woth no need to which the practical measurement of user is most chopped, cutting machine can be by control system to spindle motor electricity
The measurement of stream compares realization autostop, can effectively reduce clipping time, improves the degree of automation of equipment, reduces operator
The labor intensity of member, reduces the waste of the energy.
（2）Control method is simple, and DATA REASONING and comparison are accurate.
Description of the drawings
Fig. 1 is a kind of most chopped to cut stroke schematic diagram.
Fig. 2 is most chopped to cut stroke schematic diagram second.
Fig. 3 is the change curve of spindle motor current in cutting.
Specific implementation mode
With reference to embodiment, further illustrate the present invention.
Referring to Fig. 1, Fig. 2 it is found that when being an irregular material by cutting workpiece, the distance between line segment L is most chopped
Stroke is cut, if Fig. 1 B points position is the farthest point of entire workpiece, i.e., only B points are cut off rear entire workpiece and could be cut off, and
A points are the farthest point of entire workpiece in such as figure two.It is can be found that by the two real cases if to set maximum cutting row
Cheng Ze needs are found by the farthest point of cutting workpiece, even and if can accurately be found most after workpiece is fixed on the table
Far point, it is also very inconvenient to measure the distance between L.Seldom user is practical go to measure it is most chopped cut stroke, but estimate
One sizable cutting stroke of setting is not cut off to avoid workpiece with regard to autostop, will increase cutting instead in this way
Time causes the waste of resource.
A kind of metallographical cutter ladder of the present invention sounds out autostop method, includes the measurement of the current of spindle motor, main
The comparison of shaft current, including following three steps：
（1）Workpiece contact judges：In cutting process, the current of spindle motor is measured, when the current of spindle motor continues
Higher than pick-up current, that is, judge that cutting sheet has been touched by cutting workpiece；
（2）Test is soundd out to judge：Workpiece contact judges to be confirmed, and continues to monitor the current of spindle motor, when main shaft electricity
Less than after shutting down and judging electric current, feed shaft is controlled to sound out speed for the first time and feeds exploration distance for the first time electromechanics stream, and supervises in real time
It surveys whether the current of spindle motor judges electric current higher than shutting down, if the current of spindle motor judges electric current and lasting higher than shutting down, sentences
Break and do not cut through for cutting workpiece, terminate and shut down judgement, returns to normal cutting flow and continue to cut workpiece；If on the contrary, main
Spindle motor electric current be not above shutdown judge electric current or it is of short duration be more than shut down judge electric current but without continue, then into depth examination
Detection examination；
（3）Depth is soundd out test and is judged：
It controls feed shaft and feed speed feeding depth exploration distance is soundd out with depth, and detect the current of spindle motor in real time
Variation is judged as that workpiece is not switched off if the current of spindle motor is more than to shut down to judge electric current and continue, and returns to normal cutting
Flow continues to cut workpiece；If on the contrary, the current of spindle motor be not above shutdown judge electric current or it is of short duration be more than shut down judgement
It electric current but does not maintain, is then judged as that workpiece is completed by cutting, exit shutdown detection completion automatic stopping function.
Pick-up current：Electric current when the rigid contact workpiece of cutting sheet.
Shutdown judges electric current：Be less than pick-up current higher than no-load current, the data because of spindle motor power difference not
Together, the parameter can be determined according to field test；In the parameters setting process, need to reduce if frequently executing and shutting down test
The parameter setting.
It is first to sound out speed：The feed speed of feed shaft when souning out cutting for the first time.
It is first to sound out distance：The displacement of feed shaft walking when souning out cutting for the first time.
Depth sounds out feed speed：In one judges the period, carries out after souning out test judgement, sound out and test into depth
Second of feed speed for souning out feed shaft when cutting when judgement.
Depth sounds out distance：It is corresponding with depth exploration feed speed, in one judges the period, sound out testing and sentence
It has no progeny, when judging into depth exploration test, sounds out the displacement that feed shaft is walked when cutting for the second time.
Realize that the method for above-mentioned current monitoring can be in different platforms（Such as ABB frequency converters, Schneider PLC）With not
Same means read the current of spindle motor, can such as pass through Modbus communications protocol and read the present all inverter current numbers in market
According to also the current of spindle motor can be directly read by current sensor.
In conjunction with Fig. 3 it is found that the current of spindle motor during the work time, the variation of electric current is a curve；Entire cutting process,
There is the no-load current after electric motor starting electric current, startup, touch by the pick-up current of cutting work, the ongoing cutting electricity of cutting
Stream and shutdown electric current.
The metallographical cutter ladder of this present embodiment sounds out autostop method, that is, utilizes the change of above-mentioned the current of spindle motor
Change carries out shutdown judgement, specifically judges to shut down item by increasing feed speed monitoring the current of spindle motor variation twice
Part, which includes three phases or process：Workpiece contact judges, sounds out test judgement, depth is soundd out test and judged.First
Stage is second stage, the condition of phase III execution judgement, and second-order is phase III basis, and the phase III is second stage
Supplement.
Wherein, the first stage be after just starting automatic cutting in order to prevent saw blade due to being touched not yet by cutting workpiece
The erroneous judgement of generation；The feed speed for souning out testing setup is slightly faster than normal cutting feed speed, and cutting displacement is small, in this way
It can prevent the big cutting stress that too fast feed speed generates from causing the cut surface of cutting sheet disintegrating tablet and workpiece of burning and first
Step judges whether workpiece is cut off.Judge if contacted without workpiece, directly works as quilt with the cutting test of faster feed speed
Cutting workpiece can be because moment increase feed speed can generate prodigious cutting stress on saw blade and cause to collapse when being not cut off
Piece, and too fast feed speed can burn the cut surface of workpiece.In most cases when workpiece is not cut off, main shaft is cut
Current of electric can increase because of cutting feed speed is increased, however not excluded that when the cutting area of workpiece is small or when workpiece will be by
When cut-out, increase a small amount of feed speed, the situation that the curent change of spindle motor is little is led to prevent controller erroneous judgement
After crossing exploration test, it is also necessary to carry out more reliable depth and sound out test judgement, i.e.,：With faster feed speed walking bigger
Stroke, accordingly even when the cutting area of workpiece is small, spindle motor current, which also has apparent change, allows controller to capture, although and
Feed speed not will produce big cutting stress considerably beyond normal cutting feed speed, but because cutting area is small.
Advantage of this embodiment is that：
（1）Stroke is cut woth no need to which the practical measurement of user is most chopped, cutting machine can be by control system to spindle motor electricity
The measurement of stream compares realization autostop, can effectively reduce clipping time, improves the degree of automation of equipment, reduces operator
The labor intensity of member, reduces the waste of the energy, improves the service life of cutting machine, reduce the maintenance cost of cutting machine.
（2）Control method is simple, and DATA REASONING and comparison are accurate.
Since the foregoing is merely the specific implementation modes of the present invention, but the protection of the present invention is without being limited thereto, any skill
The technical staff in art field it is contemplated that the equivalent variation or replacement of the technical program technical characteristic, all cover the present invention's
Within protection domain.
Claims (3)
1. a kind of metallographical cutter ladder sounds out autostop method, include the measurement of the current of spindle motor, the ratio of spindle motor current
Compared with, which is characterized in that including following three steps：
（1）Workpiece contact judges：In cutting process, the current of spindle motor is measured, when the current of spindle motor is persistently higher than
Pick-up current judges that cutting sheet has been touched by cutting workpiece；
（2）Test is soundd out to judge：Workpiece contact judges to be confirmed, and continues to monitor the current of spindle motor, when spindle motor electricity
It flows after judging electric current less than shutdown, feed shaft is controlled to sound out the first exploration distance of speed feeding for the first time, and monitoring is led in real time
Whether spindle motor electric current, which is higher than to shut down, judges electric current；If the current of spindle motor judges electric current higher than shutdown and continues, it is judged as
Cutting workpiece is not cut through, and is terminated and is shut down judgement, is returned to normal cutting flow and is continued to cut workpiece；On the contrary, if main shaft is electric
Electromechanical stream be not above shutdown judge electric current or it is of short duration be more than shut down judge electric current but without continue, then enter depth exploration survey
Examination；The feed speed for souning out testing setup is slightly faster than normal cutting feed speed, and it is small to cut displacement；
（3）Depth is soundd out test and is judged：Depth is soundd out test and is judged with the stroke of faster feed speed walking bigger, i.e. depth
The feed speed that feed speed is more than exploration testing setup is soundd out, depth sounds out distance and is more than first exploration distance；Control feeding
Axis sounds out feed speed feeding depth with depth and sounds out distance, and detects the variation of the current of spindle motor in real time, if spindle motor
Electric current is more than to shut down to judge electric current and continue, then is judged as that workpiece is not switched off, and returns to normal cutting flow and continues cutter
Part；If on the contrary, the current of spindle motor be not above shutdown judge electric current or it is of short duration be more than shutdown judge electric current but do not maintain,
Then it is judged as that workpiece is completed by cutting, exits shutdown detection completion automatic stopping function.
2. metallographical cutter ladder according to claim 1 sounds out autostop method, it is characterised in that：The shutdown
Electric current is judged higher than no-load current and is less than pick-up current.
3. metallographical cutter ladder according to claim 1 sounds out autostop method, it is characterised in that：In cutting process
The electric current of spindle motor, which is read by USS agreements or read by Modbus communications protocol from frequency converter in real time by controller, to be become
Frequency device current data directly reads the current of spindle motor by current sensor.
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| CN113211527B (en) * | 2021-05-17 | 2022-09-27 | 北京大豪工缝智控科技有限公司 | Control method, device and equipment of cloth cutting motor and storage medium |
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| JPH11188573A (en) * | 1997-12-26 | 1999-07-13 | Tokyo Gas Co Ltd | Drilling control device |
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Denomination of invention: An automatic shutdown method of metallographic cutting machine Effective date of registration: 20211209 Granted publication date: 20180720 Pledgee: Laizhou Jinhui Financing Guarantee Co.,Ltd. Pledgor: LAIZHOU WEIYI EXPERIMENT MACHINE MANUFACTURING Co.,Ltd. Registration number: Y2021980014430 |
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Date of cancellation: 20220520 Granted publication date: 20180720 Pledgee: Laizhou Jinhui Financing Guarantee Co.,Ltd. Pledgor: LAIZHOU WEIYI EXPERIMENT MACHINE MANUFACTURING Co.,Ltd. Registration number: Y2021980014430 |
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Denomination of invention: A method for automatic shutdown of metallographic cutting machine ladder test Effective date of registration: 20220811 Granted publication date: 20180720 Pledgee: Shanghai Pudong Development Bank Limited by Share Ltd. Yantai branch Pledgor: LAIZHOU WEIYI EXPERIMENT MACHINE MANUFACTURING Co.,Ltd. Registration number: Y2022980012373 |