CN105785916A - Method and apparatus for protecting gravity shaft dropping of machine tool - Google Patents
Method and apparatus for protecting gravity shaft dropping of machine tool Download PDFInfo
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- CN105785916A CN105785916A CN201410776992.7A CN201410776992A CN105785916A CN 105785916 A CN105785916 A CN 105785916A CN 201410776992 A CN201410776992 A CN 201410776992A CN 105785916 A CN105785916 A CN 105785916A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
The invention relates to numerical control technology and electrical control technology, especially to a method for protecting gravity shaft dropping of a machine tool and a numerically controlled machine tool providing gravity shaft dropping protection function. The method includes the steps of starting the numerically controlled machine tool, monitoring the operation state of the numerically controlled machine tool on a real-time basis, and triggering a brake to execute brake clasping action when any of the following events is monitored, including powering off of the numerically controlled machine tool, sudden stop of the numerically controlled machine tool and shut-down of the numerically controlled machine tool. After the brake completes brake clasping action, the gravity shaft motor enters into a non-excitation state from an excitation state.
Description
Technical field
The present invention relates to Numeric Control Technology and Electrical Control Technology, particularly to a kind of method providing the tenesmus protection of Digit Control Machine Tool gravity axis and the Digit Control Machine Tool providing gravity axis tenesmus defencive function.
Background technology
Digit Control Machine Tool is a kind of automated machine tool equipped with program control system.This control system can logically process has control coding or other symbolic instruction regulated procedures, and is decoded, and represents by the numeral of code, inputs numerical control device by information carrier.Sent various control signal through calculation process by numerical control device, control the action of lathe, shape and size by drawing, automatically part is processed.Digit Control Machine Tool solves the part processing problems of complexity, precision, small lot, multi items preferably, is a kind of flexibility, dynamical automated machine tool.Compared with traditional machine tool, it has various features.Digit Control Machine Tool such as, is processed part and depends primarily on processor, need not manufacture, change many moulds, fixture, without often adjusting lathe, therefore the exploitation of single-piece, the production of be pilot and new product it is applicable to, thus shortening the Operational preparation cycle, save the expense of a large amount of technological equipment.Furthermore, the machining accuracy of Digit Control Machine Tool is high, and crudy is stable, reliable, and the concordance of part is good, steady quality.In addition, Digit Control Machine Tool just can be processed automatically and continuously after input program startup, until process finishing, operator only need to do the work such as program input, editor, part handling, cutter preparation, machining state observation and component test, and labor intensity is substantially reduced.Finally, process time can be accurately estimated in the processing of Digit Control Machine Tool in advance, the cutter used, fixture be can conduct normalized, it is easily achieved the standardization of machining information, organically combine with computer aided design and manufacture (CAD/CAM), be the basis of modernization Integrated-manufacturing Techniques.
The gravity axis of Digit Control Machine Tool (adds as example with sleeping; be generally Y-axis) due to ball screw assembly, reciprocal movement characteristic and without auto-lock function; therefore under gravity by natural whereabouts; if not being equipped with suitable band-type brake function, once shutdown or power-off suddenly will result in the damage of equipment or workpiece.
Current Digit Control Machine Tool defencive function that generally all can be dropped by gravity axis when design is taken into account; such as introduce the device/functions such as compensating cylinder, band-type brake control and outage detection; but these design adaptive surfaces of prior art are narrower; for causing that the various situations that gravity axis falls lack complete and recognize fully, thus causing the solution that cannot provide system.
Summary of the invention
It is an object of the present invention to provide a kind of method providing Digit Control Machine Tool gravity axis to drop protection, it can provide gravity axis tenesmus protective capability for the various situations in the course of processing, and implementation is easy, flexible.
Comprise the following steps: according to the method providing the tenesmus protection of Digit Control Machine Tool gravity axis of one embodiment of the invention
Start Digit Control Machine Tool；
The running status of Digit Control Machine Tool is monitored in real time；
If monitoring one of following event of generation, then brake activation performs band-type brake action: Digit Control Machine Tool power-off, Digit Control Machine Tool jerk and Digit Control Machine Tool shutdown,
Wherein, gravity axis motor is made to be entered non-excitatory state by excitatory state after described brake completes described band-type brake action.
Preferably, in the above-mentioned methods, if monitoring generation Digit Control Machine Tool power-off, then the following step is performed:
During described brake performs band-type brake action, power to master controller power supply and/or servo amplifier by utilizing ups power to continue, make described gravity axis motor keep excitatory state,
Wherein, the persistent period that described ups power is powered to described master controller power supply and/or servo amplifier completes the time needed for band-type brake action more than described brake.
Preferably, in the above-mentioned methods, described Digit Control Machine Tool is FANUC series NC system.
Preferably, in the above-mentioned methods, if monitoring generation lathe jerk, then the brake control function Brakecontrolfunction that Digit Control Machine Tool carries is started.
Preferably, in the above-mentioned methods, the step that Digit Control Machine Tool starts includes by bypassing the switch being associated with power-off button so that described power-off button is in failure state.
Preferably, in the above-mentioned methods, it is pressed if monitoring lathe described power-off button between non-processing period, then makes described Digit Control Machine Tool enter jerk pattern, and described power-off button is entered effective status by failure state.
The present invention's it is also an object that provides a kind of Digit Control Machine Tool providing gravity axis to drop protection, and it can provide gravity axis tenesmus protective capability for the various situations in the course of processing, and implementation is easy, flexible.
Include according to the Digit Control Machine Tool providing gravity axis tenesmus defencive function of one embodiment of the invention:
Gravity axis；
Gravity axis motor, it is configured to drive described gravity axis to move in vertical direction；
Master controller；
It is connected to the servo amplifier between described master controller and gravity axis motor, its instruction being configured to according to described controller, drive the operation of described gravity axis motor；
With the brake that described gravity axis is associated, it is configured to the band-type brake action performed described gravity axis in response to one of following event: Digit Control Machine Tool power-off, Digit Control Machine Tool jerk and Digit Control Machine Tool shutdown,
Wherein, described gravity axis motor is made to be entered non-excitatory state by excitatory state after described brake completes band-type brake action.
Compared with prior art, the present invention is without using additional mechanical mechanism can provide gravity axis tenesmus defencive function and the gravity axis tenesmus protection being suitable for unexpected power-off, pressing in various situation such as " shutdown " button and jerk etc. by mistake.
Accompanying drawing explanation
From described further below in conjunction with accompanying drawing, it will make above and other objects of the present invention and advantage be more fully apparent from.
Fig. 1 is the block diagram of the Digit Control Machine Tool according to one embodiment of the invention.
Fig. 2 is the condition schematic diagram of gravity axis Anti-fall.
Fig. 3 is the flow chart of the method providing the tenesmus protection of lathe gravity axis according to another embodiment of the present invention.
Detailed description of the invention
The present invention is more fully illustrated referring to the accompanying drawing which illustrates illustrative examples of the present invention.But the present invention can realize by multi-form, and is not construed as being only limitted to each embodiment given herein.The various embodiments described above provided are intended to make disclosure herein comprehensively complete, to the understanding of scope more fully and accurately.
Such as " comprising " and the term of " including " etc represents except having the unit and step having in the specification and in the claims directly and clearly state, technical scheme is also not excluded for the situation with other unit and the step directly or clearly do not stated.
According to embodiments of the invention, when triggering band-type brake action, in order to control the distance of fall of gravity axis, just Digit Control Machine Tool makes gravity axis motor by encouraging state to enter nonexcited state after completing band-type brake action.For this, can use uninterrupted power source UPS for servo amplifier provide 220V control electric current so that when main circuit breaker is closed, servo-driver control electric current be able to maintain that a period of time, with complete before gravity axis motor loses excitation report lock action.
Below by accompanying drawing, embodiments of the invention are described.In the following description, for the machining center of now widely used FANUC series NC system, α i servo amplifier and servomotor.
Fig. 1 is the block diagram of the Digit Control Machine Tool according to one embodiment of the invention.Digit Control Machine Tool 100 shown in Fig. 1 includes gravity axis 101, gravity axis motor 102, servo amplifier 103, master controller 104, ups power 105, brake 106, band-type brake relay 107, actuator power 108, power failure detection circuit 109 and control logic circuit 110.
Such as by FSSB (FANUC servo universal serial bus) communication connection between servo amplifier 103 and master controller 104, the three phase supply interface of gravity axis motor 102 is such as connected respectively through power line and encoder line with servo amplifier 103 with encoder interfaces.Under the control of master controller 104, servo amplifier 103 drives gravity axis motor 102 so that gravity axis motor 102 drives gravity axis 101 to move in vertical direction according to the control instruction set.
As shown in Figure 1, servo amplifier 103 is also connected with ups power 105, when servo amplifier 103 power-off, ups power 105 is in response to the triggering signal of power failure detection circuit 109 or control logic circuit 110, start to power to servo amplifier 103, to guarantee that servo amplifier 103 continues to run with the sufficiently long time.Alternatively, ups power 105 also can be connected with master controller 104, to guarantee that master controller 104 can also continue to run with the sufficiently long time after a loss of power.
Brake 106 is used for performing band-type brake action (namely braking gravity axis 101), and band-type brake relay 107 is connected between brake 106 and brake power supply 108, and when band-type brake relay 107 adhesive, brake power supply 108 is powered to brake 106.The adhesive of band-type brake relay 107 can be triggered, for instance include but not limited to the shutdown etc. under Digit Control Machine Tool power-off, Digit Control Machine Tool jerk and the non-machining state of Digit Control Machine Tool based on various events.As it is shown in figure 1, band-type brake relay 107 is connected with power failure detection circuit 109, when power failure detection circuit 109 detects that Digit Control Machine Tool is in off-position, it triggers band-type brake relay 107 and performs adhesive operation.Additionally, band-type brake relay 107 is also connected with control logic circuit 110, when being in jerk state or shutdown under processing and non-machining state when Digit Control Machine Tool, the latter triggers band-type brake relay 107 and performs adhesive operation.
Fig. 2 is the condition schematic diagram of gravity axis Anti-fall.From Figure 2 it can be seen that in order to prevent gravity axis from dropping, it is necessary to advanced into, by what excitatory state entered non-excitatory state, the state that brake comes into force or gravity axis machinery pins at gravity axis motor.For this, in the present embodiment, when unexpected power-off or chopper are turned off, certain power supply duration is provided to servo amplifier 103 and master controller 104 so that just make gravity axis motor 102 be entered non-excitatory state by excitatory state after brake 106 completes band-type brake action by arranging ups power 105.
Hereinafter the setting of power supply duration is further described.
In the present embodiment, the setting of power supply duration is based on the movement time of report lock.Can by response time three's sum that value movement time needed for completing report lock is power supply time delay of failure detection, band-type brake pull up time and brake.It should be noted however that the present inventor finds after further investigation, can not accurately portray the time needed for band-type brake in the manner described above calculated movement time.In order to estimate movement time more accurately, load-factor should be taken into account.Such as can will be multiplied by a coefficient more than 1 in the manner described above calculated movement time.Typically, the time delay of power supply failure detection is 10ms, relay actuation time is 20ms, and brake response time is 30ms, can be thus 2 × (10+20+30)=120ms (herein be 2 by coefficient value) by such as value movement time needed for report lock.
The α i servo amplifier adopted in FANUC series NC system, the power-on time that after servo amplifier power-off, self can maintain is about 50ms.Therefore only power supply cannot be maintained within the movement time needed for completing report lock by servo amplifier self after power-off, say, that the back-up source of such as ups power etc is requisite.Therefore, after power-off, master controller power supply needs to maintain the power supply of at least 120ms, and during this period, supply voltage must not lower than the 90% of normal voltage.When selecting the Siemens's Sitop series 24v regulated power supply with buffer module, after coming from main circuit breaker due to the three phase supply of this power supply, no matter it is therefore that externally fed disconnects or closes main circuit breaker, all can cut off the power supply of this power supply.Now, it is 100ms when the power supply buffer time that load current is 40 ampere-hours, is 200ms when load current is 20 ampere-hours, when fully loaded load current is 30 ampere-hours, may thereby determine that power supply buffer time is 150ms, namely after power-off, master controller is powered and can also be maintained 150ms.In this case, even if being not connected to ups power also can maintain the power supply of master controller during completing band-type brake action.
Fig. 3 is the flow chart of the method providing the tenesmus protection of lathe gravity axis according to another embodiment of the present invention.Exemplarily, it is assumed here that the method for the present embodiment realizes on the Digit Control Machine Tool shown in Fig. 1.
As it is shown on figure 3, in step S310, Digit Control Machine Tool is activated.Subsequently enter step S320, start the running status of Digit Control Machine Tool is monitored in real time, for instance by power failure detection circuit, power supply state is monitored.
Then performing step S330, if monitoring one of following event of generation: the shutdown under Digit Control Machine Tool power-off, Digit Control Machine Tool jerk, the non-machining state of Digit Control Machine Tool, then entering corresponding step, otherwise then return step S320.
Referring to Fig. 3, if it occur that the event of Digit Control Machine Tool power-off, then enter step S340, power failure detection circuit 109 triggers band-type brake relay 107 and performs adhesive operation, meanwhile, ups power 105, in response to the outage detection signal of power failure detection circuit 109, starts to power to servo amplifier 103 and master controller 104.As it has been described above, ups power 105 is sufficiently large to the power-on time of servo amplifier 103 and master controller 104 so that just make gravity axis motor 102 be entered non-excitatory state by excitatory state after brake 106 completes band-type brake action.
If it occur that the event of Digit Control Machine Tool jerk, then enter step S350, band-type brake relay 107 performs adhesive operation in response to the order of control logic circuit 110, meanwhile, ups power 105, in response to the order of control logic circuit 110, starts to power to servo amplifier 103 and master controller 104.Equally, the power-on time of ups power 105 should be greater than brake 106 and completes the time needed for band-type brake action.
FANUC system preferably for the present embodiment, it is possible to by the brake control function " Brakecontrolfunction " carried, by arranging the control for brake time, amplifier jerk response time realizes this step.Specifically, it is possible to following parameters is set to:
No.2005#6=1:BRKC, enables brake control function.
No.2083=300: the initial value of control for brake timer, corresponding to the time delay (value 300 here is merely exemplary, and different according to the load surplus that different frame for movements are brought, it can also take other value) of excitation.
No.2210#5, #6=1,1ESPTM0ESPTM1: the initial value of amplifier jerk response time enumerator, its be set to corresponding to jerk practical operation before time, and be input in PSM, pass through SVM.Here the time arranged should value than parameter No.2083 big, for instance could be arranged to 400ms.
Arrange through above-mentioned parameter, it can be ensured that brake completes band-type brake action when gravity axis motor excitation does not also disconnect, thus controlling the distance of fall of gravity axis well.
If it occur that the event of shutdown under the non-machining state of Digit Control Machine Tool, then enter step S360, band-type brake relay 107 performs adhesive operation in response to the order of control logic circuit 110, meanwhile, ups power 105, in response to the order of control logic circuit 110, starts to power to servo amplifier 103 and master controller 104.Equally, the power-on time of ups power 105 should be greater than brake 106 and completes the time needed for band-type brake action.
FANUC system preferably for the present embodiment, it is possible to realize this step as follows:
First when Digit Control Machine Tool starts, auxiliary reclay (notswitchoffcontrolsystem) is configured to bypass " power-off button " (when this closing of contact by (such as in step S310), power-off button is invalid), and auxiliary reclay (machineon) is configured to its contact and accesses in jerk control loop, write this relay of PMC programme-control, when pressing " shutdown " button and coming into force, cut off this relay coil power supply, lathe is made to enter jerk state, when lathe is already at jerk state, when again pressing " shutdown " button, just can cut off master controller power supply.
That is, in this step, by originally representing that " shutdown " the button pressing operations order sudden shutting off master controller power supply was transformed into the order entering jerk pattern, make when the event that Digit Control Machine Tool is shut down under non-machining state occurs, gravity axis can be realized based on brake control function " Brakecontrolfunction " to fall to controlling, thus preventing from pressing the gravity axis whereabouts that " shutdown " button causes under non-machining state.
The situation such as shutdown under Digit Control Machine Tool power-off, Digit Control Machine Tool jerk, Digit Control Machine Tool processing and non-machining state can be properly tackled according to the above embodiment of the present invention, effectively controlling the whereabouts of gravity axis, the application for the such as high security of automobile industry equipment etc, high reliability demand provides powerful guarantee.
Although having represented and discussed some aspects of the present invention, but those skilled in the art it is appreciated that can be changed without departing substantially from the principle of the invention and spirit when in above-mentioned, and therefore the scope of the present invention will be limited by claim and equivalent content.
Claims (10)
1. the method providing the tenesmus protection of Digit Control Machine Tool gravity axis, described method comprises the following steps:
Start Digit Control Machine Tool；
The running status of Digit Control Machine Tool is monitored in real time；
If monitoring one of following event of generation, then brake activation performs band-type brake action: Digit Control Machine Tool power-off, Digit Control Machine Tool jerk and Digit Control Machine Tool shutdown,
Wherein, gravity axis motor is made to be entered non-excitatory state by excitatory state after described brake completes described band-type brake action.
2. the method for offer Digit Control Machine Tool gravity axis according to claim 1 tenesmus protection, wherein, if monitoring generation Digit Control Machine Tool power-off, then performs the following step:
During described brake performs band-type brake action, power to master controller power supply and/or servo amplifier by utilizing ups power to continue, make described gravity axis motor keep excitatory state,
Wherein, the persistent period that described ups power is powered to described master controller power supply and/or servo amplifier completes the time needed for band-type brake action more than described brake.
3. the method for offer Digit Control Machine Tool gravity axis according to claim 2 tenesmus protection, wherein, described Digit Control Machine Tool is FANUC series NC system.
4. the method for offer Digit Control Machine Tool gravity axis according to claim 3 tenesmus protection, wherein, if monitoring generation lathe jerk, then starts the brake control function Brakecontrolfunction that Digit Control Machine Tool carries.
5. the method for offer Digit Control Machine Tool gravity axis according to claim 4 tenesmus protection, wherein, the step that Digit Control Machine Tool starts includes by bypassing the switch being associated with power-off button so that described power-off button is in failure state.
6. the method for offer Digit Control Machine Tool gravity axis according to claim 5 tenesmus protection; wherein; if monitoring lathe described power-off button between non-processing period to be pressed, then make described Digit Control Machine Tool enter jerk pattern, and described power-off button is entered effective status by failure state.
7. the Digit Control Machine Tool that gravity axis tenesmus defencive function is provided, it is characterised in that including:
Gravity axis；
Gravity axis motor, it is configured to drive described gravity axis to move in vertical direction；
Master controller；
It is connected to the servo amplifier between described master controller and gravity axis motor, its instruction being configured to according to described controller, drive the operation of described gravity axis motor；
With the brake that described gravity axis is associated, it is configured to the band-type brake action performed described gravity axis in response to one of following event: Digit Control Machine Tool power-off, Digit Control Machine Tool jerk and Digit Control Machine Tool shutdown,
Wherein, described gravity axis motor is made to be entered non-excitatory state by excitatory state after described brake completes band-type brake action.
8. the Digit Control Machine Tool of offer gravity axis according to claim 7 tenesmus defencive function; wherein; also include the ups power being connected with described servo amplifier and/or master controller; when described Digit Control Machine Tool power-off; described ups power is powered to described servo amplifier and/or master controller so that described gravity axis motor keeps excitatory state; wherein, the persistent period that described ups power is powered to described master controller power supply and/or servo amplifier completes the time needed for band-type brake action more than described brake.
9. the Digit Control Machine Tool of offer gravity axis according to claim 8 tenesmus defencive function, wherein, described Digit Control Machine Tool is FANUC series NC system.
10. the Digit Control Machine Tool of offer gravity axis according to claim 9 tenesmus defencive function, wherein, if monitoring generation lathe jerk, then starts the brake control function Brakecontrolfunction that Digit Control Machine Tool carries.
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| CN201410776992.7A CN105785916B (en) | 2014-12-15 | 2014-12-15 | The method and apparatus of lathe gravity axis tenesmus protection are provided |
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| CN201410776992.7A CN105785916B (en) | 2014-12-15 | 2014-12-15 | The method and apparatus of lathe gravity axis tenesmus protection are provided |
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| CN108826163A (en) * | 2018-06-07 | 2018-11-16 | 佛山市毅丰电器实业有限公司 | A kind of motor control assembly of lamps and lanterns |
| CN110187694A (en) * | 2018-02-22 | 2019-08-30 | 发那科株式会社 | Fault prediction device and machine learning device |
| CN110209115A (en) * | 2019-07-05 | 2019-09-06 | 新代科技(苏州)有限公司 | The power-off protection method of CNC toolroom machine and the circuit breaking protective system for applying it |
| CN112975551A (en) * | 2021-02-26 | 2021-06-18 | 江苏海默森智能科技有限公司 | Lathe with automatic lifting function after outage |
| CN113017666A (en) * | 2021-02-05 | 2021-06-25 | 明峰医疗系统股份有限公司 | Anti-falling brake circuit of diagnostic bed and CT scanning bed |
| TWI792783B (en) * | 2021-12-20 | 2023-02-11 | 上銀科技股份有限公司 | Teaching equipment for electromechanical systems |
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