CN102350486B - Positioning method of three-work station piston ring molding machine under drive of alternating-current servo motor - Google Patents
Positioning method of three-work station piston ring molding machine under drive of alternating-current servo motor Download PDFInfo
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- CN102350486B CN102350486B CN 201110333392 CN201110333392A CN102350486B CN 102350486 B CN102350486 B CN 102350486B CN 201110333392 CN201110333392 CN 201110333392 CN 201110333392 A CN201110333392 A CN 201110333392A CN 102350486 B CN102350486 B CN 102350486B
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Abstract
The invention discloses a positioning method of a three-work station piston ring molding machine under drive of an alternating-current servo motor. The method comprises the following steps: 1) an alternating-current servo motor is used as a transfer power source of the three-work station piston ring molding machine, a machine tool controller send a transfer command pulse sequence to a servo driver, and the alternating-current servo motor is driven to rotate and drive a speed-change mechanism to drive a three-work station rotation mechanism to rotate; and 2) the machine tool controller collects related signals for positioning rotation angles of the three-work station rotation mechanism, when the collected signals indicate that the three-work station rotation mechanism completes 120-degree rotation, the controller immediately stops sending the command pulse, the alternating-current servo motor stops rotating, a transfer mechanism is in accurate stop, and a corresponding sand frame support is in a molding position exactly. Compared with a traditional drive scheme, the technical scheme of the invention has the beneficial effect that the alternating-current servo motor, instead of a traditional motor and three-phase asynchronous motor, is used for transfer drive, more reliable, stable and efficient transfer operation is realized, so that equipment achieves superior technical performance and technical index.
Description
Technical field
The present invention relates to sand mold manufacturing technology and mechanical equipment technical field, particularly three station piston ring molding machines more particularly, relate to utilize AC servo machinery driving three station piston ring molding machines to realize the method for location moulding.
Background technology
Three station piston ring molding machines are a kind of efficient piston ring blank casting sand mould manufacturing equipments.Its three station means that same plane centers on same rotating shaft, the three cover sand frame carriages that mutual deviation 120 degree are symmetrical.In the sand mold manufacture process, rotating shaft drives the carriage that is loaded with the sand frame, inserts to fast one by one posed positions, annotates sand, compacting, and the demoulding is produced.Every compacting one sand mold only needs the several seconds.For guaranteeing so efficiently stable operation of equipment, the rapidity of three station transpositions and the accuracy that puts in place are most crucial.
Usually, the transposition power source of three station piston ring molding machines is hydraulic motor or AC induction motor.Its Main Problems is that the accuracy that puts in place is difficult to guarantee, and is often auxiliary in " latch location " measure, often can locate misalignment because pin or pin-and-hole wear and tear, and the actual effect difficulty is fully up to expectations.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of method of utilizing AC servo machinery driving three station piston ring molding machines location, can solve prior art and adopt hydraulic motor or AC induction motor to drive the accuracy that causes can not to guarantee, and the problem of location misalignment.
The objective of the invention is to be achieved through the following technical solutions:
The method that this utilizes AC servo machinery driving three station piston ring molding machines location comprises the following steps:
Step 1: with the transposition power source of AC servo motor as three station piston ring molding machines, machine tool controller sends the command pulse sequence of transposition to servo-driver, the driving AC servo motor is rotated and drives gear and drives the rotation of three station rotary mechanisms, the command pulse of machine tool controller is followed in the rotation of AC servo motor all the time, be that its rotary speed is directly proportional with pulse frequency, whether it is rotated further, depend on whether machine tool controller stops paying out pulse, wherein, be a moderating process by gear to three station rotary mechanisms from AC servo motor;
Step 2: described machine tool controller gathers coherent signal, the anglec of rotation that is used for location three station rotary mechanisms, when the signal that gathers shows that three station rotary structures have been finished the rotation of 120 degree, controller is stopped paying out command pulse at once, the AC servo motor spline, the indexing mechanism standard is stopped, and corresponding sand frame carriage just in time is in posed positions.
Further, described step 2 also comprises the in advance step of reduction of speed, namely when the signal that gathers shows that three station rotary structures are near completion the rotation of 120 degree, controller reduces the command pulse frequency, AC servo motor reduces rotating speed, indexing mechanism is rationally to slowly run, then collecting to reflect accurately that three station rotary mechanisms have arrived the signal of the position of finishing 120 degree rotations the time, controller is stopped paying out command pulse at once, AC servo electrode spline, the indexing mechanism standard is stopped, and corresponding sand frame carriage just in time is in posed positions.
As a kind of specific embodiment wherein, step 2 is achieved in the following ways;
Machine tool controller sends the command pulse sequence of transposition to servo-driver, AC servo motor begins rotation, rotary encoder sends the angular displacement feedback signal to servo-driver, the command pulse sum that machine tool controller sends, just corresponding 120 degree angular displacements of the required rotation of indexing mechanism, pass through programming, approach when should send out the pulse sum when sending umber of pulse, the command pulse frequency reduces, and the indexing mechanism reduction of speed is when sending umber of pulse and equal to send out the pulse sum, machine tool controller is stopped paying out command pulse, the AC servo motor spline, the indexing mechanism standard is stopped, and corresponding sand frame carriage just in time is in posed positions.
As another specific embodiment, step 2 is achieved in the following ways;
Near the moment input position of gear, be not provided with and input the approach switch I of position rotation as the counting position signalling component with moment, be arranged on the moment input position with the induction sender piece I of this approach switch I pairing and with moment input position rotation, when a circle is rotated at the moment input position of gear, this approach switch I sends the feedback signal I that puts in place to machine tool controller, machine tool controller is counted the feedback signal I that puts in place, the count value of this feedback signal I that puts in place and the anglec of rotation of three station rotary mechanisms are corresponding relation, when count value shows that the rotation of indexing mechanism has been spent near 120, machine tool controller reduces the command pulse frequency, AC servo motor reduces rotating speed, and indexing mechanism is rationally to slowly run;
Suitable position in three station rotary mechanisms is provided with approach switch II as the posed positions signalling component simultaneously, approach switch II is fixed, the induction sender piece II of pairing rotates with indexing mechanism mutually with it, when one of them sand frame carriage just in time arrives posed positions, this approach switch II sends the feedback signal II that puts in place to machine tool controller, machine tool controller is stopped paying out command pulse immediately, the AC servo motor spline, the indexing mechanism standard is stopped, and corresponding sand frame carriage just in time is in posed positions.
Further, above-mentioned two kinds of specific embodiment can be merged into exercises usefulness, namely when device power-up, maintenance adjustment, adopts the second specific embodiment to carry out " original position " first location of indexing mechanism; In equipment running process, adopt the first specific embodiment to carry out the transposition location.
The invention has the beneficial effects as follows:
Because AC servo motor has high-resolution, pinpoint accuracy angular displacement stationkeeping ability, so on three station piston ring molding machines, hydraulic motor and the threephase asynchronous machine traditional with the AC servo motor replacement carry out the transposition driving, need not use again ancillary methods such as " latch location ", can realize, efficiently transposition operation more reliable, stable than conventional drive scheme, make the technical performance of equipment and technical indicator more excellent.
Other advantages of the present invention, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on being apparent to those skilled in the art to investigating hereinafter, perhaps can obtain from the practice of the present invention instruction.Target of the present invention and other advantages can realize and obtain by following specification and claims.
Description of drawings
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing, wherein:
Accompanying drawing is structural representation of the present invention.
The specific embodiment
Hereinafter with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail.Should be appreciated that preferred embodiment only for the present invention is described, rather than in order to limit protection scope of the present invention.
As shown in the figure, the method for utilizing AC servo machinery driving three station piston ring molding machines location of the present invention comprises the following steps:
Step 1: with the transposition power source of AC servo motor as three station piston ring molding machines, machine tool controller sends the command pulse sequence of transposition to servo-driver, the driving AC servo motor is rotated and drives gear and drives the rotation of three station rotary mechanisms, the command pulse of machine tool controller is followed in the rotation of AC servo motor all the time, be that its rotary speed is directly proportional with pulse frequency, whether it is rotated further, depend on whether controller stops paying out pulse, wherein, be a moderating process by gear to three station rotary mechanisms from AC servo motor;
Step 2: described machine tool controller gathers coherent signal, the anglec of rotation that is used for location three station rotary mechanisms, when the signal that gathers shows that three station rotary structures have been finished the rotation of 120 degree, machine tool controller is stopped paying out command pulse at once, AC servo electrode spline, the indexing mechanism standard is stopped, and corresponding sand frame carriage just in time is in posed positions.
As further improvement, step 2 also comprises the in advance step of reduction of speed, namely when the signal that gathers can determine that three station rotary mechanisms are near completion the rotation of 120 degree, controller reduces the command pulse frequency, AC servo motor reduces rotating speed, indexing mechanism is rationally to slowly run, then collecting when showing that three station rotary mechanisms have arrived the signal of the position of finishing 120 degree rotations, controller is stopped paying out command pulse at once, AC servo electrode spline, the indexing mechanism standard is stopped, and corresponding sand frame carriage just in time is in posed positions.
In concrete application process, can come by dual mode the function of performing step 2, be described below:
Mode 1
Machine tool controller sends the command pulse sequence of transposition to servo-driver, AC servo motor begins rotation, rotary encoder sends the angular displacement feedback signal to servo-driver, the command pulse sum that machine tool controller sends, just corresponding 120 degree angular displacements of the required rotation of indexing mechanism, pass through programming, approach when should send out pulse sum (for example should send out pulse sum about 90%) when sending umber of pulse, the command pulse frequency reduces, and the indexing mechanism reduction of speed is when sending umber of pulse and equal to send out the pulse sum, controller is stopped paying out command pulse, the AC servo motor spline, the indexing mechanism standard is stopped, and corresponding sand frame carriage just in time is in posed positions;
As further improvement, this mode has also adopted the auxiliary measure that stops, namely near three station indexing mechanisms, be provided with approach switch II as the posed positions signalling component, approach switch II is fixed, corresponding with it, there is an induction sender piece II to rotate with indexing mechanism, after indexing mechanism slows down, when one of them sand frame carriage just in time arrives posed positions, the sender piece just makes this approach switch II send the feedback signal II that puts in place to machine tool controller, and machine tool controller is stopped paying out command pulse immediately, the AC servo motor spline, the indexing mechanism standard is stopped, and corresponding sand frame carriage just in time is in posed positions.
Auxiliary stop measure by adopting, can further guarantee to stop paying out real-time and the accuracy of command pulse, in actual applications, this is auxiliary stop measure and overall pulse counting stop measure can adopting "or" and " with " mode carry out Rulemaking.
Mode 2
Near the moment input position of gear, be not provided with and input the approach switch I of position rotation as the counting position signalling component with moment, be arranged on the moment input position with the induction sender piece I of this approach switch I pairing and with moment input position rotation, when a circle is rotated at the moment input position of gear, this approach switch I sends the feedback signal I that puts in place to machine tool controller, machine tool controller is counted the feedback signal I that puts in place, the count value of this feedback signal I that puts in place and the anglec of rotation of three station rotary mechanisms are corresponding relation, when count value shows that the rotation of indexing mechanism has been spent near 120, machine tool controller reduces the command pulse frequency, AC servo motor reduces rotating speed, and indexing mechanism is rationally to slowly run;
Simultaneously near three station indexing mechanisms, be provided with approach switch II as the posed positions signalling component, approach switch is fixed, corresponding with it, there is an induction sender piece II to rotate with indexing mechanism, after indexing mechanism slows down, when one of them sand frame carriage just in time arrives posed positions, the sender piece just makes this approach switch II send the feedback signal II that puts in place to machine tool controller, machine tool controller is stopped paying out command pulse immediately, the AC servo motor spline, the indexing mechanism standard is stopped, and corresponding sand frame carriage just in time is in posed positions.
Eventually the above, mode 2 is to come to the feedback signal I forecast that puts in place, makes the deceleration foundation, comes to the feedback signal II sender that puts in place, makes the spline standard and stops foundation; Mode 1 is accurately locate by command pulse sum and the corresponding relations of indexing mechanism 120 degree angular displacements, and confirms that by the feedback signal II that puts in place 120 degree transpositions are successful, allows the faults such as timely " discovery " the contingent machinery of controller energy is stuck.
As further improvement, above-mentioned dual mode can be merged into enforcement usefulness, namely when device power-up, maintenance adjustment, employing mode 2 is carried out " original position " of indexing mechanism and is just located; In equipment running process, employing mode 1 is carried out the transposition location.
Among the present invention, all approach switchs all are equipped with corresponding induction sender piece, induction sender piece rotates with the axis, approach switch maintains static, when arriving preposition or prearranged signal number, the induction sender piece of rotation makes approach switch sender moment, namely is that controller sends instructions, make AC servo motor, so three station indexing mechanisms are slowed down or stop in carve.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from aim and the scope of the technical program, these and technical scheme of the present invention are without the modification of essential distinction and be equal to replacement and all should be encompassed in the middle of the claim scope of the present invention.
Claims (3)
1. utilize the method for AC servo machinery driving three station piston ring molding machines location, it is characterized in that: described method comprises the following steps:
Step 1: with the transposition power source of AC servo motor as three station piston ring molding machines, machine tool controller sends the command pulse sequence of transposition to servo-driver, the driving AC servo motor is rotated and drives gear and drives the rotation of three station rotary mechanisms, the rotation of AC servo motor is the command pulse of following controller all the time, be that its rotary speed is directly proportional with pulse frequency, whether it is rotated further, and depends on whether machine tool controller stops paying out pulse;
Wherein, be a moderating process by gear to three station rotary mechanisms from AC servo motor;
Step 2: described machine tool controller gathers coherent signal, the anglec of rotation that is used for location three station rotary mechanisms, when the signal that gathers shows that three station rotary mechanisms have finished the rotation of 120 degree, machine tool controller is stopped paying out command pulse at once, AC servo electrode spline, the indexing mechanism standard is stopped, and corresponding sand frame carriage just in time is in posed positions;
Step 2 specifically realizes by following dual mode:
Mode one: machine tool controller sends the command pulse sequence of transposition to servo-driver, AC servo motor begins rotation, rotary encoder sends the angular displacement feedback signal to servo-driver, the command pulse sum that machine tool controller sends, just corresponding 120 degree angular displacements of the required rotation of indexing mechanism, pass through programming, approach when should send out the pulse sum when sending umber of pulse, the command pulse frequency reduces, and the indexing mechanism reduction of speed is when sending umber of pulse and equal to send out the pulse sum, controller is stopped paying out command pulse, the AC servo motor spline, the indexing mechanism standard is stopped, and corresponding sand frame carriage just in time is in posed positions;
Near mode two: the moment input position of gear, be not provided with and input the approach switch I of position rotation as the counting position signalling component with moment, be arranged on the moment input position with the induction sender piece I of this approach switch I pairing and with moment input position rotation, when a circle is rotated at the moment input position of gear, this approach switch I sends the feedback signal I that puts in place to machine tool controller, machine tool controller is counted the feedback signal I that puts in place, the count value of this feedback signal I that puts in place and the anglec of rotation of three station rotary mechanisms are corresponding relation, when count value shows that the rotation of indexing mechanism has been spent near 120, machine tool controller reduces the command pulse frequency, AC servo motor reduces rotating speed, and indexing mechanism is rationally to slowly run;
Suitable position in three station rotary mechanisms is provided with approach switch II as the posed positions signalling component simultaneously, approach switch II is fixed, the induction sender piece II of pairing rotates with indexing mechanism mutually with it, when one of them sand frame carriage just in time arrives posed positions, this approach switch II sends the feedback signal II that puts in place to machine tool controller, machine tool controller is stopped paying out command pulse immediately, the AC servo motor spline, the indexing mechanism standard is stopped, and corresponding sand frame carriage just in time is in posed positions.
2. the method for utilizing AC servo machinery driving three station piston ring molding machines location according to claim 1, it is characterized in that: described step 2 also comprises the in advance step of reduction of speed, namely when the signal that gathers can determine that three station rotary mechanisms are near completion the rotation of 120 degree, machine tool controller reduces the command pulse frequency, AC servo motor reduces rotating speed, indexing mechanism is rationally to slowly run, then collecting when showing that three station rotary mechanisms have arrived the signal of the position of finishing 120 degree rotations, machine tool controller is stopped paying out command pulse at once, the AC servo motor spline, the indexing mechanism standard is stopped, and corresponding sand frame carriage just in time is in posed positions.
3. the method for utilizing AC servo machinery driving three station piston ring molding machines location according to claim 1, it is characterized in that: in device power-up, when maintenance is adjusted, employing mode two is carried out " original position " of indexing mechanism and is just located, that is: near the moment of gear input position, be not provided with approach switch I with moment input position rotation as the counting position signalling component, be arranged on the moment input position with the induction sender piece I of this approach switch I pairing and with moment input position rotation, when a circle is rotated at the moment input position of gear, this approach switch I sends the feedback signal I that puts in place to machine tool controller, machine tool controller is counted the feedback signal I that puts in place, the count value of this feedback signal I that puts in place and the anglec of rotation of three station rotary mechanisms are corresponding relation, when count value shows that the rotation of indexing mechanism has been spent near 120, machine tool controller reduces the command pulse frequency, AC servo motor reduces rotating speed, and indexing mechanism is rationally to slowly run;
Suitable position in three station rotary mechanisms is provided with approach switch II as the posed positions signalling component simultaneously, approach switch II is fixed, the induction sender piece II of pairing rotates with indexing mechanism mutually with it, when one of them sand frame carriage just in time arrives posed positions, this approach switch II sends the feedback signal II that puts in place to machine tool controller, machine tool controller is stopped paying out command pulse immediately, the AC servo motor spline, the indexing mechanism standard is stopped, and corresponding sand frame carriage just in time is in posed positions;
In addition in equipment running process, employing mode one is carried out the transposition location, that is: machine tool controller sends the command pulse sequence of transposition to servo-driver, AC servo motor begins rotation, rotary encoder sends the angular displacement feedback signal to servo-driver, the command pulse sum that machine tool controller sends, just corresponding 120 degree angular displacements of the required rotation of indexing mechanism, pass through programming, approach when should send out the pulse sum when sending umber of pulse, the command pulse frequency reduces, and the indexing mechanism reduction of speed is when sending umber of pulse and equal to send out the pulse sum, controller is stopped paying out command pulse, the AC servo motor spline, the indexing mechanism standard is stopped, and corresponding sand frame carriage just in time is in posed positions.
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| CN 201110333392 CN102350486B (en) | 2011-10-28 | 2011-10-28 | Positioning method of three-work station piston ring molding machine under drive of alternating-current servo motor |
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| CN102615250A (en) * | 2012-04-25 | 2012-08-01 | 机械工业第三设计研究院 | Method and system for controlling thickness of sand mold of piston ring three-station molding machine |
| CN113044720B (en) * | 2021-03-11 | 2023-08-11 | 三一汽车起重机械有限公司 | Control method and device for working machine and working machine |
| CN113206627B (en) * | 2021-06-01 | 2023-09-15 | 大连法斯特尔机电有限责任公司 | High-precision and high-dynamic-response servo motor spindle accurate stop control method |
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Patent Citations (5)
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| US3879898A (en) * | 1972-03-03 | 1975-04-29 | Cranfield Inst Of Tech | Gear grinder with digital control |
| JP2004122259A (en) * | 2002-09-30 | 2004-04-22 | Nachi Fujikoshi Corp | Adaptive control device for grinder |
| JP2006136979A (en) * | 2004-11-12 | 2006-06-01 | Kao Corp | Method and device for detecting machining position deviation |
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