CN220944137U - Safe cutter loosening device - Google Patents
Safe cutter loosening device Download PDFInfo
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- CN220944137U CN220944137U CN202322598831.0U CN202322598831U CN220944137U CN 220944137 U CN220944137 U CN 220944137U CN 202322598831 U CN202322598831 U CN 202322598831U CN 220944137 U CN220944137 U CN 220944137U
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- main shaft
- plc
- valve control
- knife
- control relay
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 33
- 230000006378 damage Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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Abstract
The utility model discloses a safe cutter loosening device, which comprises: a cutter loosening button; the loose knife button includes: the first group of switching contacts and the second group of switching contacts are connected into the control loop in series. Only when the cutter loosening button is pressed down and the normally open contacts of the two groups of conversion contacts are simultaneously connected, the PLC can receive cutter loosening signals, so that the probability of false triggering is effectively reduced, and the safety performance of the cutter loosening device is improved; the public ends of the two groups of switching contacts are prevented from being directly connected with a 24V power supply, and even if a machine tool works, the suspended normally closed contacts are not electrified, so that the risk of short circuit is effectively avoided, and the safety performance of the tool loosening device is further improved.
Description
Technical Field
The utility model relates to the technical field of processing production equipment, in particular to a safe cutter loosening device.
Background
The loose knife button of the machining center can be used for manually unloading the knife under the condition that the protective door is opened, the button is positioned in the machining space, the service environment is severe, if false triggering can lead to accidental falling of the knife, and personnel injury or workpiece damage is caused. The existing cutter loosening device only has a group of conversion contacts, a common end pin is connected with a 24V power supply, a normally open contact pin is used for outputting a button signal and is connected with a signal input module of a PLC, and the defect is that when a machine tool works, the suspended normally closed contact pin is electrified and short circuit risks easily occur; in addition, once the normally open contact of the button is triggered by mistake, the action of mis-landed knife is necessarily generated, and accidents are caused.
Disclosure of Invention
In order to solve the technical problems, the utility model provides a safe cutter loosening device. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
The utility model adopts the following technical scheme:
There is provided a safety knife loosening device comprising: a cutter loosening button; the loose knife button includes: a first set of conversion contacts and a second set of conversion contacts, and the first set of conversion contacts and the second set of conversion contacts are connected in series to a control loop; the normally open contacts of the second group of conversion contacts are connected to a PLC direct current 24V power line, the common end of the second group of conversion contacts is connected to the normally open contacts of the first group of conversion contacts, and the common end of the first group of conversion contacts is connected to a PLC input interface.
Further, the safety knife loosening device further comprises: the main shaft cutter loosening electromagnetic valve and the main shaft cutter loosening valve control relay are connected in series, and the main shaft cutter loosening electromagnetic valve and the main shaft cutter loosening valve control relay are connected into a PLC direct current 24V power supply loop.
Further, the main shaft loose knife valve control relay includes: the first main shaft loose knife valve control relay switching contact and the second main shaft loose knife valve control relay switching contact; and the main shaft cutter loosening electromagnetic valve, the first main shaft cutter loosening valve control relay conversion contact and the second main shaft cutter loosening valve control relay conversion contact are connected in series and connected with a PLC (programmable logic controller) direct-current 24V power supply loop.
Further, a normally open contact of the first main shaft cutter loosening valve control relay switching contact is connected to a PLC direct-current 24V power line, and a common end of the first main shaft cutter loosening valve control relay switching contact is connected to one end of the main shaft cutter loosening electromagnetic valve.
Further, a normally open contact of the second main shaft cutter loosening valve control relay switching contact is connected to a PLC direct current 0V power line, and a common end of the second main shaft cutter loosening valve control relay switching contact is connected to the other end of the main shaft cutter loosening electromagnetic valve.
Further, the main shaft loose knife valve control relay still includes: the first main shaft loose knife valve control relay coil, one end of the first main shaft loose knife valve control relay coil is connected to a first output interface channel of the PLC, and the other end of the first main shaft loose knife valve control relay coil is connected to a PLC direct current 0V power line.
Further, the main shaft loose knife valve control relay still includes: and one end of the second main shaft cutter loosening valve control relay coil is connected to a second output interface channel of the PLC, and the other end of the second main shaft cutter loosening valve control relay coil is connected to a PLC direct-current 0V power line.
Further, the PLC input interface is a conventional digital quantity input interface on an I/O control unit or a controller of the PLC.
Further, the first output interface channel of the PLC is a first safe digital quantity output interface channel on an I/O control unit or a controller of the PLC; the second output interface channel of the PLC is a second safe digital quantity output interface channel on an I/O control unit or a controller of the PLC.
The utility model has the beneficial effects that:
1. The cutter loosening button is provided with two groups of conversion contacts, the two groups of conversion contacts are connected in series to the control loop, and the PLC can receive cutter loosening signals only when the cutter loosening button is pressed down and a normally open contact of the two groups of conversion contacts is simultaneously connected, so that the probability of false triggering is effectively reduced, and the safety performance of the cutter loosening device is improved;
2. The public ends of the two groups of switching contacts are prevented from being directly connected with a 24V power supply, and even if a machine tool works, the suspended normally closed contacts are not electrified, so that the risk of short circuit is effectively avoided, and the safety performance of the tool loosening device is further improved.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic circuit diagram of a safety knife loosening device of the present utility model.
Detailed Description
Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the described embodiments are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, in some illustrative embodiments, the present utility model provides a safety knife loosening device comprising: a cutter loosening button S461, a main shaft cutter loosening electromagnetic valve Y461 and a main shaft cutter loosening valve control relay; when the cutter loosening button S461 is pressed, the PLC detects a cutter loosening signal and controls the main shaft cutter loosening valve control relay to be electrified, so that the main shaft cutter loosening electromagnetic valve Y461 is opened, and cutter loosening action is completed.
The loose blade button S461 includes: the control circuit comprises a first group of conversion contacts and a second group of conversion contacts, wherein the first group of conversion contacts and the second group of conversion contacts are connected in series into a control circuit 1, and the control circuit 1 refers to a circuit loop between a PLC input interface and a PLC direct-current 24V power line 2.
The first set of transfer contacts includes: the switching contact comprises a first group of switching contact normally open contacts 14, a first group of switching contact common terminals 11 and a first group of switching contact normally closed contacts 12.
The second set of transfer contacts includes: a second set of switching contact normally open contacts 24, a second set of switching contact common terminals 21, a second set of switching contact normally closed contacts 22.
The second group of switching contact normally open contacts 24 are connected to the PLC direct current 24V power line 2, the second group of switching contact common terminals 21 are connected to the first group of switching contact normally open contacts 14, the first group of switching contact common terminals 11 are connected to the PLC input interface, and the first group of switching contact normally closed contacts 12 and the second group of switching contact normally closed contacts 22 are used for outputting cutter loosening button signals. The PLC input interface is the I/O control unit A250 of the PLC or the conventional digital quantity input interface X261 on the controller.
When the cutter loosening button S461 is pressed, the first group of normally open contacts 14 are communicated with the first group of common ends 11 of the switching contacts, and the second group of normally open contacts 24 are communicated with the second group of common ends 21 of the switching contacts, so that the control loop 1 is communicated, a cutter loosening signal can be detected by a PLC input interface, and the cutter loosening signal is an input signal of the cutter loosening button of the main shaft.
The main shaft loose knife solenoid valve Y461 and the main shaft loose knife valve control relay are connected in series to be connected with a PLC direct current 24V power supply loop, when the PLC detects a loose knife signal, a control signal is output to the main shaft loose knife valve control relay, so that the main shaft loose knife valve control relay is electrified, the main shaft loose knife solenoid valve Y461 is electrified and acts, and loose knives are realized. The structural design of the embodiment enables the PLC to receive the cutter loosening signal only when the cutter loosening button is pressed down and the normally open contacts of the two groups of conversion contacts are simultaneously connected, compared with one group of conversion contacts, the two groups of conversion contacts can effectively reduce the false triggering probability, the common end of the two groups of conversion contacts is not directly connected with a 24V power supply, and even if a machine tool works, the suspended normally closed contacts are not electrified, so that the short circuit risk is effectively avoided.
The main shaft loose knife valve control relay includes: the first main shaft loose knife valve control relay coil K46111, the first main shaft loose knife valve control relay switching contact K46112, the second main shaft loose knife valve control relay coil K46121 and the second main shaft loose knife valve control relay switching contact K46122.
The first main shaft loose knife valve control relay switch contact K46111 includes: the first relay switching contact normally open contact 34, the first relay switching contact common terminal 31, the first relay switching contact normally closed contact 32.
The second main shaft loose knife valve control relay switch contact K46122 includes: the second relay switching contact normally open contact 44, the second relay switching contact common terminal 41, the second relay switching contact normally closed contact 42.
The first relay switching contact normally open contact 34 is connected to the PLC dc 24V power line 2, and the first relay switching contact common terminal 31 is connected to one end of the main shaft loose blade solenoid valve Y461. The second relay switching contact normally open contact 44 is connected to the PLC dc 0V power line 3, and the second relay switching contact common terminal 41 is connected to the other end of the main shaft loose blade solenoid valve Y461.
The connection mode enables the main shaft cutter loosening electromagnetic valve Y461 and the first main shaft cutter loosening valve control relay switching contact K46111 and the second main shaft cutter loosening valve control relay switching contact K46122 to be connected in series to the PLC direct current 24V power supply loop 4. When the first relay switching contact normally open contact 34 is connected with the first relay switching contact common end 31 and the second relay switching contact normally open contact 44 is connected with the second relay switching contact common end 41, the PLC direct current 24V power supply loop 4 can be conducted, so that the main shaft cutter loosening electromagnetic valve Y461 is powered on and cutter loosening action is executed.
One end of the first main shaft cutter loosening valve control relay coil K46111 is connected to a first output interface channel of the PLC, and the other end of the first main shaft cutter loosening valve control relay coil K46111 is connected to a PLC direct-current 0V power line 3. One end of the second main shaft cutter loosening valve control relay coil K46121 is connected to a second output interface channel of the PLC, and the other end of the second main shaft cutter loosening valve control relay coil K46121 is connected to a PLC direct current 0V power line 3.
The first output interface channel of the PLC is an I/O control unit A250 of the PLC or a first safe digital quantity output interface channel X291 on the controller; the second output interface channel of the PLC is an I/O control unit A250 of the PLC or a second safe digital quantity output interface channel X292 on the controller.
After detecting the cutter loosening signal, the PLC outputs a control instruction to control the first main shaft cutter loosening valve control relay coil K46111 and the second main shaft cutter loosening valve control relay coil K46121 to be powered on. When the first main shaft knife loosening valve control relay coil K46111 is powered on, the first relay switching contact normally open contact 34 is communicated with the first relay switching contact common end 31. Meanwhile, when the second main shaft cutter loosening valve control relay coil K46121 is electrified, the second relay switching contact normally open contact 44 is communicated with the second relay switching contact common end 41, so that the PLC direct-current 24V power supply loop 4 is conducted, the main shaft cutter loosening electromagnetic valve Y461 is opened, and cutter loosening action is completed.
The positive and negative poles of the cutter loosening valve are respectively controlled by the two groups of relay switching contacts connected with the PLC safe double-channel output points while the first group of switching contacts and the second group of switching contacts are connected in series into the control loop 1, so that the probability of false triggering is further effectively reduced, and the safety performance of the cutter loosening button is greatly improved.
The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Claims (9)
1. A safety knife loosening device comprising: a cutter loosening button; the utility model is characterized in that, loose sword button includes: a first set of conversion contacts and a second set of conversion contacts, and the first set of conversion contacts and the second set of conversion contacts are connected in series to a control loop; the normally open contacts of the second group of conversion contacts are connected to a PLC direct current 24V power line, the common end of the second group of conversion contacts is connected to the normally open contacts of the first group of conversion contacts, and the common end of the first group of conversion contacts is connected to a PLC input interface.
2. The safety knife loosening device of claim 1, further comprising: the main shaft cutter loosening electromagnetic valve and the main shaft cutter loosening valve control relay are connected in series, and the main shaft cutter loosening electromagnetic valve and the main shaft cutter loosening valve control relay are connected into a PLC direct current 24V power supply loop.
3. The safety knife release apparatus of claim 2, wherein the spindle knife release valve control relay comprises: the first main shaft loose knife valve control relay switching contact and the second main shaft loose knife valve control relay switching contact;
And the main shaft cutter loosening electromagnetic valve, the first main shaft cutter loosening valve control relay conversion contact and the second main shaft cutter loosening valve control relay conversion contact are connected in series and connected with a PLC (programmable logic controller) direct-current 24V power supply loop.
4. A safety knife loosening device as claimed in claim 3, wherein the normally open contact of the first main shaft knife loosening valve control relay switching contact is connected to a PLC dc 24V power line, and the common end of the first main shaft knife loosening valve control relay switching contact is connected to one end of the main shaft knife loosening solenoid valve.
5. The safety knife loosening device as claimed in claim 4, wherein the normally open contact of the second main shaft knife loosening valve control relay switching contact is connected to a PLC dc 0V power line, and the common end of the second main shaft knife loosening valve control relay switching contact is connected to the other end of the main shaft knife loosening solenoid valve.
6. The safety knife release apparatus of claim 5, wherein the spindle knife release valve control relay further comprises: the first main shaft loose knife valve control relay coil, one end of the first main shaft loose knife valve control relay coil is connected to a first output interface channel of the PLC, and the other end of the first main shaft loose knife valve control relay coil is connected to a PLC direct current 0V power line.
7. The safety knife release apparatus of claim 6, wherein the spindle knife release valve control relay further comprises: and one end of the second main shaft cutter loosening valve control relay coil is connected to a second output interface channel of the PLC, and the other end of the second main shaft cutter loosening valve control relay coil is connected to a PLC direct-current 0V power line.
8. The safety knife releasing apparatus of claim 7, wherein the PLC input interface is a conventional digital quantity input interface on an I/O control unit or controller of the PLC.
9. The safety knife loosening device as claimed in claim 8, wherein the first output interface channel of the PLC is a first safety digital output interface channel on an I/O control unit or controller of the PLC; the second output interface channel of the PLC is a second safe digital quantity output interface channel on an I/O control unit or a controller of the PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322598831.0U CN220944137U (en) | 2023-09-25 | 2023-09-25 | Safe cutter loosening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322598831.0U CN220944137U (en) | 2023-09-25 | 2023-09-25 | Safe cutter loosening device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220944137U true CN220944137U (en) | 2024-05-14 |
Family
ID=91005677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322598831.0U Active CN220944137U (en) | 2023-09-25 | 2023-09-25 | Safe cutter loosening device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220944137U (en) |
-
2023
- 2023-09-25 CN CN202322598831.0U patent/CN220944137U/en active Active
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