CN202878000U - Machine tool speed safety protecting device - Google Patents
Machine tool speed safety protecting device Download PDFInfo
- Publication number
- CN202878000U CN202878000U CN 201220367861 CN201220367861U CN202878000U CN 202878000 U CN202878000 U CN 202878000U CN 201220367861 CN201220367861 CN 201220367861 CN 201220367861 U CN201220367861 U CN 201220367861U CN 202878000 U CN202878000 U CN 202878000U
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- CN
- China
- Prior art keywords
- speed
- spindle
- machine tool
- relay
- controller
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- Expired - Fee Related
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Abstract
The utility model discloses a machine tool speed safety protecting device, and relates to the technical filed of machine tool protection. The device comprises a spindle motor, and the spindle motor is connected with a spindle gearbox through a coupling. A speed sensor is arranged on a spindle of a machine tool, and the speed sensor transmits a spindle speed signal to a controller. The controller is provided with a speed setting knob and a time setting knob. The controller is connected with a relay, and a normally-closed contact of the relay is connected on a starting circuit of the machine tool in series. One end of a normally-open contact of the relay is connected with a live wire, and the other end of the normally-open contact of the relay is connected with a sound-light alarm device. The normally-open contact of the relay and the sound-light alarm device form an alarm circuit. The machine tool speed safety protecting device has the advantages that the sound-light alarm device reminds an operator to lower the rotation speed of the spindle through manual operation when the rotation speed of the spindle exceeds a safety speed; and the starting circuit of the spindle motor of the machine tool is disconnected to stop the spindle motor when the spindle runs to exceed a set time under the condition of exceeding the safety speed, so that working safety is ensured.
Description
Technical field
The utility model relates to lathe resist technology field, and specifically a kind of lathe speed safety guard can be applied to the safeguard protection at the widely used lathe in processing and manufacturing field.
Background technology
Modern processing manufacturing industry is generally used lathe miscellaneous; machine tool chief axis generally is used for holding workpiece or be installed cutter; main shaft is in the motion state of High Rotation Speed when work; generally in order to guarantee that main shaft workpiece or unlikely the flying out of cutter when the High Rotation Speed can set the rotating speed upper limit of a main shaft; speed can not be higher than this higher limit when main shaft rotates; but in practical operation, often can occur to cause the too fast accident that workpiece or cutter are flown out of the speed of mainshaft owing to the absent minded of operator or in order to improve working (machining) efficiency, thereby bring personal injury.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art; the utility model provides a kind of lathe speed safety guard; when machine spindle speed too fast; when having surpassed safe speed of rotation; can send first sound and light alarm, the operator is pointed out, if the operator does not carry out the reduction of speed operation in setting-up time; the power supply of this device automatic cutting off table bed forces lathe to shut down to guarantee safety.
The utility model is realized with following technical scheme: a kind of lathe speed safety guard; comprise spindle motor; spindle motor is connected with shaft transmission by shaft coupling; main shaft at lathe is equipped with a velocity sensor; velocity sensor is sent to controller with the spindle speed signal; controller is provided with Speed Setting knob and time setting knob; controller is connected with and relay; the relay normally-closed contact is connected in the startup loop of lathe; relay normally open contact one termination live wire; the other end connects acoustic-optic alarm, and relay normally open contact and acoustic-optic alarm consist of warning circuit.
It further is: described velocity sensor adopts contactless velocity sensor.
The beneficial effects of the utility model are: when the rotating speed of main shaft surpasses safety speed, remind the operator by manually reducing the speed of mainshaft by acoustic-optic alarm; After main shaft surpasses safety speed operation setting-up time, stop spindle motor by the start-up circuit that disconnects the machine tool chief axis motor, guarantee work safety.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the utility model theory diagram;
Fig. 2 is the utility model structural representation.
Among the figure: 1, spindle motor, 2, shaft coupling, 3, shaft transmission, 4, velocity sensor, 5, controller, 6, the Speed Setting knob, 7, the time setting knob, 8, the relay normally-closed contact, 9, lathe starts the loop, and 10, relay normally open contact, 11, acoustic-optic alarm.
The specific embodiment
As depicted in figs. 1 and 2; lathe speed safety guard has a spindle motor 1; spindle motor 1 is connected with shaft transmission 3 by shaft coupling 2; main shaft at lathe is equipped with a velocity sensor 4; be used for measuring the rotating speed of main shaft, and rate signal is fed back to controller 5 by holding wire, controller 5 is provided with Speed Setting knob 6 and time setting knob 7; Negotiation speed setting knob 6 can be set safety speed, can set the safety speed time by time setting knob 7.Controller 5 is connected with relay, and relay normally-closed contact 8 is connected on lathe and starts in the loop 9; Relay normally open contact one termination live wire, the other end connects acoustic-optic alarm 11, and relay normally open contact 10 and acoustic-optic alarm 11 consist of warning circuit.
Wherein, velocity sensor 4 adopts noncontacting proximity sensor, when speed surpasses safety speed, relay normally open contact 10 closures, connect the working power of acoustic-optic alarm 11, acoustic-optic alarm 11 sends sound and light alarm by indicator lamp and buzzer, reminds operator's machine tool chief axis speed to surpass safety speed, needs to pass through manually reduction of speed.
If within the time of setting, protective device makes whole lathe outage so, also so that the spindle motor outage, thereby guarantees the safety of whole lathe.
The course of work: velocity sensor feeds back to controller with the speed of mainshaft, compare with the safety speed (speed limit) of prior setting, when the speed of mainshaft during greater than safety speed, controller sends sound and light alarm by acoustic-optic alarm first, thereby prompting lathe operator reduces machine spindle speed.If still surpass safety speed at the in setting time rotating speed, if the operator is not by manually reducing the speed of mainshaft, this device can disconnect and be serially connected in the output relay normally-closed contact that lathe starts the inside, loop, thereby disconnect the startup loop of machine tool chief axis motor, stop the motion of lathe, to guarantee the safety of work.
Claims (2)
1. lathe speed safety guard; comprise spindle motor (1); spindle motor (1) is connected with shaft transmission (3) by shaft coupling (2); it is characterized in that: the main shaft at lathe is equipped with a velocity sensor (4); velocity sensor (4) is sent to controller (5) with the spindle speed signal; controller (5) is provided with Speed Setting knob (6) and time setting knob (7); controller (5) is connected with relay; the relay normally-closed contact is connected in the startup loop of lathe; relay normally open contact one termination live wire; the other end connects acoustic-optic alarm (11), and relay normally open contact and acoustic-optic alarm (11) consist of warning circuit.
2. lathe speed safety guard according to claim 1, it is characterized in that: described velocity sensor (4) adopts contactless velocity sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220367861 CN202878000U (en) | 2012-07-27 | 2012-07-27 | Machine tool speed safety protecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220367861 CN202878000U (en) | 2012-07-27 | 2012-07-27 | Machine tool speed safety protecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202878000U true CN202878000U (en) | 2013-04-17 |
Family
ID=48069465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220367861 Expired - Fee Related CN202878000U (en) | 2012-07-27 | 2012-07-27 | Machine tool speed safety protecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202878000U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104816370A (en) * | 2015-04-21 | 2015-08-05 | 安徽宏博木业有限公司 | Anti-blockage device of wood chipper |
| CN105772757A (en) * | 2016-04-14 | 2016-07-20 | 苏州布德机电设备有限公司 | Alarming device for numerical control lathe |
| CN109144120A (en) * | 2017-06-15 | 2019-01-04 | 大族激光科技产业集团股份有限公司 | A kind of speed of mainshaft control method and device |
| CN111948984A (en) * | 2020-08-20 | 2020-11-17 | 苏州珈玛自动化科技有限公司 | Numerical control machine tool PLC control method capable of prolonging service life of machine tool spindle |
-
2012
- 2012-07-27 CN CN 201220367861 patent/CN202878000U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104816370A (en) * | 2015-04-21 | 2015-08-05 | 安徽宏博木业有限公司 | Anti-blockage device of wood chipper |
| CN105772757A (en) * | 2016-04-14 | 2016-07-20 | 苏州布德机电设备有限公司 | Alarming device for numerical control lathe |
| CN109144120A (en) * | 2017-06-15 | 2019-01-04 | 大族激光科技产业集团股份有限公司 | A kind of speed of mainshaft control method and device |
| CN111948984A (en) * | 2020-08-20 | 2020-11-17 | 苏州珈玛自动化科技有限公司 | Numerical control machine tool PLC control method capable of prolonging service life of machine tool spindle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20130727 |