CN105108563A - Light-control safety switch of machine tool - Google Patents
Light-control safety switch of machine tool Download PDFInfo
- Publication number
- CN105108563A CN105108563A CN201510609121.0A CN201510609121A CN105108563A CN 105108563 A CN105108563 A CN 105108563A CN 201510609121 A CN201510609121 A CN 201510609121A CN 105108563 A CN105108563 A CN 105108563A
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- China
- Prior art keywords
- triode
- diode
- audion
- light
- resistance
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0078—Safety devices protecting the operator, e.g. against accident or noise
- B23Q11/0092—Safety devices protecting the operator, e.g. against accident or noise actuating braking or stopping means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electronic Switches (AREA)
Abstract
The invention discloses a light-control safety switch of a machine tool. The safety switch comprises an alternating-current power source, a transformer, a bridge rectifier, a first capacitor, a second capacitor, a first diode, a second diode, a first audion, a second audion, a third audion, a first resistor, a second resistor, a third resistor, a relay, a potentiometer and a light dependent resistor, when a hand is close to a dangerous zone, the light dependent resistor is in the high resistance state due to the fact that light is warded off by the hand, a collector electrode of the third audion is changed to the low potential, the second diode, the first audion and the second audion are all conductive, so that the second diode, the first audion and the second audion are attracted by the relay, and a brake device of the machine tool is switched on through a normally open contact of the relay, so that the machine tool is made to stop running. According to the light-control safety switch, the light dependent resistor serves as a light signal transducer, when the hand or other parts of a human body get close to a dangerous position, the brake device on the machine tool can be started through the safety switch rapidly, so that the machine tool stops running, thereby the safety protection effect is achieved, and when the hand leaves the dangerous area, the machine tool can resume to normal operation.
Description
Technical field
The present invention relates to a kind of switch of lathe, particularly relate to a kind of light-operated security switch of lathe.
Background technology
Lathe refers to the machine of manufacturing machine, also known as machine-tool or toolroom machine.Generally be divided into Metal Cutting Machine Tool, forging machine tool and wood craft machines etc., in modern mechanical manufacturing, the method for processing equipment part is a lot, except machining, also have casting, welding, punching press, extruding etc., in every case belong to the part that required precision is higher and surface roughness requirements is thinner, generally all finally need process by the method for cutting on lathe.Lathe plays significant role in the construction of national economic modernization, but when people are easier near lathe the privileged sites had an accident, brake, will cause great accident if do not have corresponding safety switch to control braking equipment.
Summary of the invention
Object of the present invention is just the light-operated security switch providing a kind of lathe in order to solve the problem.
The present invention is achieved through the following technical solutions above-mentioned purpose:
A kind of light-operated security switch of lathe, comprise AC power, transformer, bridge rectifier, first electric capacity, second electric capacity, first diode, second diode, first triode is to the 3rd triode, first resistance is to the 3rd resistance, relay, potentiometer and photo resistance, the first end of described AC power is connected with the first end of the primary coil of described transformer, second end of described AC power is connected with the second end of the primary coil of described transformer, the first end of the secondary coil of described transformer is connected with the first voltage end of described bridge rectifier, second end of the secondary coil of described transformer is connected with the second voltage end of described bridge rectifier, the positive pole of described bridge rectifier respectively with the first end of described first electric capacity, the negative pole of described first diode, the first end of described relay, the first end of described first resistance is connected with the first end of described 3rd resistance, the positive pole of described first diode respectively with the second end of described relay, the colelctor electrode of described first triode is connected with the emitter stage of described second triode, the base stage of described first triode is connected with the colelctor electrode of described second triode, the base stage of described second triode is connected with the positive pole of described second diode, the negative pole of described second diode is connected with the second end of described first resistance and the colelctor electrode of described 3rd triode respectively, the emitter stage of described 3rd triode is connected with the first end of described second resistance, the base stage of described 3rd triode respectively with the first end of described second electric capacity, the first end of described potentiometer is connected with the first end of described photo resistance, second end of described 3rd resistance is connected with the second end of described potentiometer and the sliding end of described potentiometer respectively, second end of described photo resistance respectively with the second end of described second electric capacity, second end of described second resistance, the emitter stage of described first triode, second end of described first electric capacity is connected with the negative pole of described bridge rectifier.
In said structure, photo resistance is used for the power of sensing light, and whether relay operates for controlling lathe.
Beneficial effect of the present invention is:
The present invention is a kind of light-operated security switch of lathe; the privileged sites that lathe is easier to have an accident can be arranged on; this safety switch utilizes photo-resistor as optical signal sensor; when staff or other positions are near dangerous position; safety switch can start rapidly the brake apparatus on lathe, and lathe is shut down, thus serves the effect of safeguard protection; when staff leaves hazardous area, lathe can recover again to run well.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the light-operated security switch of a kind of lathe of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, the light-operated security switch of a kind of lathe of the present invention, comprise AC power AC, transformer T, bridge rectifier BR, first electric capacity C1, second electric capacity C2, first diode D1, second diode D2, first triode VT1 is to the 3rd triode VT3, first resistance R1 is to the 3rd resistance R3, relay J, potentiometer RP and photo resistance RL, the first end of AC power AC is connected with the first end of the primary coil of transformer T, second end of AC power AC is connected with the second end of the primary coil of transformer T, the first end of the secondary coil of transformer T is connected with first voltage end of bridge rectifier BR, second end of the secondary coil of transformer T is connected with second voltage end of bridge rectifier BR, the positive pole of bridge rectifier BR respectively with the first end of the first electric capacity C1, the negative pole of the first diode D1, the first end of relay J, the first end of the first resistance R1 is connected with the first end of the 3rd resistance R3, the positive pole of the first diode D1 respectively with the second end of relay J, the colelctor electrode of the first triode VT1 is connected with the emitter stage of the second triode VT2, the base stage of the first triode VT1 is connected with the colelctor electrode of the second triode VT2, the base stage of the second triode VT2 is connected with the positive pole of the second diode D2, the negative pole of the second diode D2 is connected with second end of the first resistance R1 and the colelctor electrode of the 3rd triode VT3 respectively, the emitter stage of the 3rd triode VT3 is connected with the first end of the second resistance R2, the base stage of the 3rd triode VT3 respectively with the first end of the second electric capacity C2, the first end of potentiometer RP is connected with the first end of photo resistance RL, second end of the 3rd resistance R3 is connected with second end of potentiometer RP and the sliding end of potentiometer RP respectively, second end of photo resistance RL respectively with second end of the second electric capacity C2, second end of the second resistance R2, the emitter stage of the first triode VT1, second end of the first electric capacity C1 is connected with the negative pole of bridge rectifier BR.
When hand is near deathtrap, photo resistance RL is high-impedance state because light is lived by stick shift, 3rd triode VT3 becomes high potential and saturation conduction because of base stage, its colelctor electrode becomes electronegative potential, second diode D2, the first triode VT1 and the equal conducting of the second triode VT2, make relay J adhesive, the brake apparatus of the normally open contact connection lathe of relay J makes lathe shut down.After hand leaves deathtrap, photo resistance RL reverts to low resistive state, and the first triode VT1 all ends to the 3rd triode VT3, and relay J discharges, and lathe remains in operation.
Claims (1)
1. the light-operated security switch of a lathe, it is characterized in that: comprise AC power, transformer, bridge rectifier, first electric capacity, second electric capacity, first diode, second diode, first triode is to the 3rd triode, first resistance is to the 3rd resistance, relay, potentiometer and photo resistance, the first end of described AC power is connected with the first end of the primary coil of described transformer, second end of described AC power is connected with the second end of the primary coil of described transformer, the first end of the secondary coil of described transformer is connected with the first voltage end of described bridge rectifier, second end of the secondary coil of described transformer is connected with the second voltage end of described bridge rectifier, the positive pole of described bridge rectifier respectively with the first end of described first electric capacity, the negative pole of described first diode, the first end of described relay, the first end of described first resistance is connected with the first end of described 3rd resistance, the positive pole of described first diode respectively with the second end of described relay, the colelctor electrode of described first triode is connected with the emitter stage of described second triode, the base stage of described first triode is connected with the colelctor electrode of described second triode, the base stage of described second triode is connected with the positive pole of described second diode, the negative pole of described second diode is connected with the second end of described first resistance and the colelctor electrode of described 3rd triode respectively, the emitter stage of described 3rd triode is connected with the first end of described second resistance, the base stage of described 3rd triode respectively with the first end of described second electric capacity, the first end of described potentiometer is connected with the first end of described photo resistance, second end of described 3rd resistance is connected with the second end of described potentiometer and the sliding end of described potentiometer respectively, second end of described photo resistance respectively with the second end of described second electric capacity, second end of described second resistance, the emitter stage of described first triode, second end of described first electric capacity is connected with the negative pole of described bridge rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510609121.0A CN105108563A (en) | 2015-09-22 | 2015-09-22 | Light-control safety switch of machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510609121.0A CN105108563A (en) | 2015-09-22 | 2015-09-22 | Light-control safety switch of machine tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105108563A true CN105108563A (en) | 2015-12-02 |
Family
ID=54656786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510609121.0A Pending CN105108563A (en) | 2015-09-22 | 2015-09-22 | Light-control safety switch of machine tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105108563A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB828409A (en) * | 1957-09-14 | 1960-02-17 | Lindner Gmbh Herbert | Improvements in or relating to means for stopping the feed in drilling operations, more particularly for jig drills |
| US4725943A (en) * | 1984-07-09 | 1988-02-16 | Amada Company, Limited | Method and apparatus of sequential control for safety for machine tools |
| CN201970142U (en) * | 2011-01-25 | 2011-09-14 | 毛振刚 | Safety protection device for machine tool |
| CN205057647U (en) * | 2015-09-22 | 2016-03-02 | 四川精诚至强科技有限公司 | Light -operated safety switch of lathe |
-
2015
- 2015-09-22 CN CN201510609121.0A patent/CN105108563A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB828409A (en) * | 1957-09-14 | 1960-02-17 | Lindner Gmbh Herbert | Improvements in or relating to means for stopping the feed in drilling operations, more particularly for jig drills |
| US4725943A (en) * | 1984-07-09 | 1988-02-16 | Amada Company, Limited | Method and apparatus of sequential control for safety for machine tools |
| CN201970142U (en) * | 2011-01-25 | 2011-09-14 | 毛振刚 | Safety protection device for machine tool |
| CN205057647U (en) * | 2015-09-22 | 2016-03-02 | 四川精诚至强科技有限公司 | Light -operated safety switch of lathe |
Non-Patent Citations (1)
| Title |
|---|
| 全新实用电路集粹编辑委员会: "《全新实用电路集粹》", 31 January 2006, 机械工业出版社 * |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151202 |