CN113741345B - Safety detection control system of numerical control milling machine - Google Patents
Safety detection control system of numerical control milling machine Download PDFInfo
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- CN113741345B CN113741345B CN202110997746.4A CN202110997746A CN113741345B CN 113741345 B CN113741345 B CN 113741345B CN 202110997746 A CN202110997746 A CN 202110997746A CN 113741345 B CN113741345 B CN 113741345B
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- 238000001514 detection method Methods 0.000 title claims abstract description 52
- 238000003801 milling Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/406—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by monitoring or safety
- G05B19/4065—Monitoring tool breakage, life or condition
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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
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/37—Measurements
- G05B2219/37616—Use same monitoring tools to monitor tool and workpiece
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- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Auxiliary Devices For Machine Tools (AREA)
Abstract
The invention discloses a safety detection control system of a numerical control milling machine, which relates to the technical field of equipment monitoring, wherein when a numerical control module sends a stop instruction, a servo drive stops outputting voltage to a spindle motor, but the spindle motor continuously rotates in the same direction due to inertia, so that the spindle motor continuously operates under the working condition of a generator and feeds power to the servo drive, and the output end voltage of the servo drive is not zero as long as the rotating speed of the spindle motor is not zero, so that a safety door switch cannot be normally opened when the spindle motor rotates, the output voltage of the servo drive is zero when the rotating speed of the spindle motor is zero, the safety door switch can be normally opened, and the spindle motor cannot normally operate when the safety door is opened, so that the problem that the equipment operates to cause casualties to personnel after the milling machine enters the safety door under the condition of opening the safety door is solved, and the safety of the numerical control milling machine in the production operation process is greatly improved.
Description
Technical Field
The invention belongs to the technical field of equipment monitoring, and particularly relates to a safety detection control system of a numerical control milling machine.
Background
At present, with the progress of society and the development of technology, the application of automation technology in industrial production is more and more extensive, so that the functions of machine equipment are more and more comprehensive, and the machine equipment becomes more and more huge and complex, therefore, strict requirements on the safety when the machine equipment is operated must be made, the quality of a machine is evaluated, and in addition to the degree of automation, whether the safety is guaranteed or not should be emphasized. The existing protective door of the numerical control milling machine is only opened manually, and the running state of the machine tool is not detected, so that the protective door can be opened under the condition that a main shaft of the machine tool is still rotated, a workpiece or an iron block can be thrown out of the protective door, and casualties are caused.
Disclosure of Invention
The invention aims to provide a safety detection control system of a numerical control milling machine, which solves the problem that the existing protective door of the numerical control milling machine is only opened manually and is not detected in the running state of a machine tool, so that the protective door can be opened under the condition that a main shaft of the machine tool rotates, workpieces or iron blocks can be thrown out of the protective door, and casualties are caused.
The purpose of the invention can be realized by the following technical scheme: a safety detection control system of a numerical control milling machine comprises a door opening button, an IO module, a relay module and a numerical control module, wherein the door opening button is used for generating a door opening input signal and is electrically connected with the IO module; the IO module is connected with the relay module and the numerical control module, the IO module is used for sending a control signal of the numerical control module and a door opening input signal of the door opening button into the relay module, and the relay module is used for converting the control signal and the door opening input signal; the relay module is connected with zero-speed detection relay, zero-speed detection relay is used for detecting the running state of safety protection equipment and generating an input signal for opening the door, and zero-speed detection relay is electrically connected with the safety door switch.
Furthermore, the emergency exit switch includes solenoid valve and the bolt device that is controlled by the solenoid valve, is provided with normally open contact and normally closed contact between solenoid valve and the bolt device.
Furthermore, the electromagnetic valve of the safety door is electrified, the bolt device is pulled out, the normally open contact is closed, and the normally closed contact is opened.
Furthermore, the numerical control module is connected with a servo drive, and the servo drive is respectively connected with the spindle motor and the zero-speed detection relay; the numerical control module is connected with the servo drive through an optical cable, and the spindle motor is connected with the servo drive through a power line and an encoder line.
Further, the detection process of the operation state of the zero-speed detection relay safety protection device includes: a voltage detection circuit is arranged in the zero-speed detection relay, and the three-phase output voltage of the spindle motor is obtained through the voltage detection circuit; when the three-phase output voltage of the spindle motor is not 0, intercepting and invalidating a door opening input signal; when the three-phase output voltage of the spindle motor is 0, a door opening output signal is sent to the safety door switch.
Furthermore, a power generation coil is arranged on the spindle motor.
Furthermore, the emergency exit switch is installed on the emergency exit, and when the emergency exit was in the open mode, the normally closed contact disconnection in the emergency exit switch, passed the signal disconnection that targets in place of closing the door that gives numerical control module through relay module, IO module to make the lathe unable operation, when the emergency exit closed and target in place, then the lathe resumes normal operating.
A control method of a safety detection control system of a numerical control milling machine comprises the following steps: when the machine tool finishes running and the numerical control module sends a stop instruction, the servo drive stops outputting voltage to the spindle motor, but the spindle motor continues to rotate in the same direction due to inertia, so that the spindle motor continues to run under the working condition of the generator and feeds power to the servo drive, and as long as the rotating speed of the spindle motor is not zero, the voltage of the output end of the servo drive is not zero; at the moment, a voltage detection circuit of the zero-speed detection relay can detect whether the voltage difference of the output voltage end of the servo drive is zero or not, when the voltage of the output end of the servo drive is detected to be zero, the zero-speed detection relay controls the coil to be electrified, and the normally open contact controlled by the control coil is closed. At this moment, press the button of opening the door and send input signal to IO unit that opens the door, IO unit will open the door input signal and send to relay module, relay module's control coil circular telegram, relay module's normally open contact is closed to make the coil circular telegram of emergency exit switch, the bolt of emergency exit switch can be extracted, and the emergency exit can be opened.
The invention has the beneficial effects that: when the numerical control module sends a stop instruction, the servo drive stops outputting voltage to the spindle motor, but the spindle motor can continue to rotate in the same direction due to inertia, so that the spindle motor continues to operate under the working condition of a generator and feeds power to the servo drive, and as long as the rotating speed of the spindle motor is not zero, the voltage of the output end of the servo drive is not zero, so that when the spindle motor rotates, the safety door switch cannot be normally opened, and when the rotating speed of the spindle motor is zero, the output voltage of the servo drive is zero, the safety door switch can be normally opened, so that the problem that when a machine tool spindle rotates to open a safety door, workpieces or iron blocks can be thrown out of the safety door, and casualties are caused can be effectively solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic block diagram of a safety detection control system of a numerically controlled milling machine.
Detailed Description
As shown in fig. 1, a safety detection control system of a numerically controlled milling machine comprises a door opening button, a zero-speed detection relay, a safety door switch, a servo drive, a spindle motor, a numerical control module, an IO module and a relay module;
the door opening button is used for generating a door opening input signal and is electrically connected with the IO module; the IO module is connected with the relay module and the numerical control module, the IO module is used for sending a control signal of the numerical control module and a door opening input signal of the door opening button into the relay module, and the relay module is used for converting the control signal and the door opening input signal; the relay module is connected with a zero-speed detection relay, the zero-speed detection relay is used for detecting the running state of the safety protection equipment and generating a door opening input signal, and the zero-speed detection relay is electrically connected with the safety door switch;
the safety door switch comprises an electromagnetic valve and a bolt device controlled by the electromagnetic valve, a normally open contact and a normally closed contact are arranged between the electromagnetic valve and the bolt device, the safety door electromagnetic valve is electrified, the bolt device can be pulled out, the normally open contact is closed, and the normally closed contact is opened;
the numerical control module is connected with a servo drive, and the servo drive is respectively connected with a spindle motor and a zero-speed detection relay; it is further noted that the numerical control module is connected with the servo drive through an optical cable, and the spindle motor is connected with the servo drive through a power line and an encoder line;
the detection process of the running state of the zero-speed detection relay safety protection device comprises the following steps:
step L1: a voltage detection circuit is arranged in the zero-speed detection relay;
step L2: acquiring three-phase output voltage of a spindle motor;
step L3: when the three-phase output voltage of the spindle motor is not 0, intercepting and invalidating a door opening input signal; when the three-phase output voltage of the spindle motor is 0, a door opening output signal is sent to the safety door switch; the model of the zero-speed relay is XPSVNE1142P.
The spindle motor is provided with a power generation coil, and it needs to be further explained that when the machine tool finishes running and the numerical control module sends a stop instruction, the servo drive stops outputting voltage to the spindle motor, but the spindle motor continues to rotate in the same direction due to inertia, so that the spindle motor continues to run under the working condition of the power generator and feeds power to the servo drive, and as long as the rotating speed of the spindle motor is not zero, the voltage of the output end of the servo drive is not zero;
in the specific implementation process, it needs to be further explained that after the safety door switch receives the door opening output signal, the normally open contact in the safety door switch is closed, so that the electromagnetic valve is electrified, and the bolt device can be pulled out from the safety door switch;
the safety door switch is installed on the safety door, and in the specific implementation process, it needs to be further explained that when the safety door is in an open state, the normally closed contact in the safety door switch is disconnected, and the door closing in-place signal transmitted to the numerical control module through the relay module and the IO module is disconnected, so that the machine tool cannot run, and when the safety door is closed in place, the machine tool returns to normal running.
The working principle is as follows: when the machine tool finishes running and the numerical control module sends a stop instruction, the servo drive stops outputting voltage to the spindle motor, but the spindle motor continues to rotate in the same direction due to inertia, so that the spindle motor continues to run under the working condition of a generator and feeds power to the servo drive, and as long as the rotating speed of the spindle motor is not zero, the voltage of the output end of the servo drive is not zero; at the moment, a voltage detection circuit of the zero-speed detection relay can detect whether the voltage difference of the output voltage end of the servo drive is zero or not, when the voltage of the output end of the servo drive is detected to be zero, the zero-speed detection relay controls the coil to be electrified, and the normally open contact controlled by the control coil is closed. At this moment, send the input signal to the IO unit that opens the door according to the button that opens the door, IO unit will open the door input signal and send to the relay module, the control coil circular telegram of relay module, the normally open contact closure of relay module to make the coil circular telegram of emergency exit switch, the bolt of emergency exit switch can be extracted, and the emergency exit can be opened.
Under the condition that the emergency exit is opened, the emergency exit switch normally closed contact breaks off, and the signal disconnection that targets in place of closing the door that passes to numerical control module through relay module, IO module, the lathe can't move, and when the emergency exit closed, the lathe just can normal operating.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus, device and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules is only one logical functional division, and there may be other divisions when the actual implementation is performed; the modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the method of this embodiment.
Finally, it should be noted that the above examples are only intended to illustrate the technical process of the present invention and not to limit the same, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical process of the present invention without departing from the spirit and scope of the technical process of the present invention.
Claims (7)
1. A safety detection control system of a numerical control milling machine comprises a door opening button, an IO module, a relay module and a numerical control module, and is characterized in that the door opening button is used for generating a door opening input signal and is electrically connected with the IO module; the IO module is connected with the relay module and the numerical control module, the IO module is used for sending a control signal of the numerical control module and a door opening input signal of the door opening button into the relay module, and the relay module is used for converting the control signal and the door opening input signal; the relay module is connected with a zero-speed detection relay, the zero-speed detection relay is used for detecting the running state of the safety protection equipment and generating a door opening input signal, and the zero-speed detection relay is electrically connected with the safety door switch;
the numerical control module is connected with a servo drive, and the servo drive is respectively connected with a spindle motor and a zero-speed detection relay;
spindle motor continues the operation with the generator operating mode, to servo drive feed, servo drive's output voltage is nonzero, the voltage difference that detects servo drive's output voltage end until the voltage detection circuit of zero-speed detection relay is zero, zero-speed detection relay control coil circular telegram, the normally open contact that receives coil control is closed, press the door opening button and send the input signal to the IO unit of opening the door, the IO unit will open the door input signal and send to the relay module, the control coil circular telegram of relay module, normally open contact is closed, thereby make the coil circular telegram of safety door switch, the bolt of safety door switch can be extracted.
2. The numerically controlled milling machine safety detection control system according to claim 1, wherein the safety door switch includes a solenoid valve and a latch device controlled by the solenoid valve, and a normally open contact and a normally closed contact are provided between the solenoid valve and the latch device.
3. The numerically controlled milling machine safety detection control system according to claim 2, wherein when the safety door solenoid valve is energized and the plug pin device is pulled out, the normally open contact is closed and the normally closed contact is opened.
4. The safety detection control system of the numerical control milling machine according to claim 1, wherein the detection process of the operation state of the zero-speed detection relay safety protection device comprises the following steps: a voltage detection circuit is arranged in the zero-speed detection relay, and the three-phase output voltage of the spindle motor is obtained through the voltage detection circuit; when the three-phase output voltage of the spindle motor is not 0, intercepting and invalidating a door opening input signal; when the three-phase output voltage of the spindle motor is 0, a door opening output signal is sent to the safety door switch.
5. The numerically controlled milling machine safety detection control system according to claim 4, wherein the spindle motor is provided with a generating coil.
6. The safety detection control system of the numerical control milling machine according to claim 4, wherein the safety door switch is installed on the safety door, when the safety door is in an open state, the normally closed contact in the safety door switch is opened, and the door closing in-place signal transmitted to the numerical control module through the relay module and the IO module is opened, so that the machine tool cannot run, and when the safety door is closed in place, the machine tool returns to normal running.
7. The safety detection control system of a numerical control milling machine according to claim 1, wherein the numerical control module is connected with the servo drive through an optical cable, and the spindle motor is connected with the servo drive through a power line and an encoder line.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110997746.4A CN113741345B (en) | 2021-08-27 | 2021-08-27 | Safety detection control system of numerical control milling machine |
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| CN202110997746.4A CN113741345B (en) | 2021-08-27 | 2021-08-27 | Safety detection control system of numerical control milling machine |
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| CN113741345B true CN113741345B (en) | 2023-03-07 |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05237738A (en) * | 1992-02-27 | 1993-09-17 | Mori Seiki Co Ltd | Safety device |
| ATE475739T1 (en) * | 2007-06-05 | 2010-08-15 | Arcelik As | WASHER/DRYER |
| JP5187027B2 (en) * | 2008-06-27 | 2013-04-24 | 豊和工業株式会社 | Machine tool door lock control device |
| KR101843997B1 (en) * | 2011-07-14 | 2018-04-02 | 시티즌 도케이 가부시키가이샤 | Machine tool and drive regulation device for said machine tool |
| JP6013166B2 (en) * | 2012-12-11 | 2016-10-25 | 株式会社ディスコ | Cutting equipment |
| EP3144654A1 (en) * | 2015-09-18 | 2017-03-22 | Siemens Aktiengesellschaft | Brake testing method for the functional testing of a holding brake for an electric motor in an electric drive system |
| CN206484357U (en) * | 2017-01-17 | 2017-09-12 | 大连行健数控机械技术有限公司 | A kind of door machine interlocking gear of Digit Control Machine Tool |
| CN110421404B (en) * | 2019-09-06 | 2020-09-04 | 龙岩市腾兴机械维修有限公司 | Emergency exit for digit control machine tool |
| CN111463749B (en) * | 2020-03-17 | 2025-02-11 | 安徽新诺精工股份有限公司 | An electrical protection circuit for cutting off servo power |
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