KR100329824B1 - An apparatus and method for reducing speed of auto-door in machine tool - Google Patents

Abstract

The present invention relates to an auto door installed on the outside of a complex machine tool (aka machining center) or other machine tool.

Auto door deceleration control device of the present invention is installed on the front of the machine tool auto door operated by pneumatic; A first door sensor installed at a first deceleration point spaced apart from the opening point at which the auto door is completely opened in a direction of operation of the auto door; A second door detection sensor installed at a second deceleration point spaced apart from the closing point at which the auto door is completely closed in a direction of operation of the auto door; A cylinder assembly for opening and closing the auto door by pneumatic pressure; The control unit may include a control unit that adjusts the hydraulic pressure of the cylinder assembly in response to input signals from the first and second door detection sensors. When the first and second deceleration points are reached before the auto door is completely opened and closed, the control unit It is characterized by reducing the operating speed of the auto door by reducing the hydraulic amount of the cylinder assembly. The present invention can reduce the impact sound generated by the impact when the door is opened or closed by reducing the speed of the door near the point where the impact occurs.

Description

Auto door deceleration control device and method for machine tools {AN APPARATUS AND METHOD FOR REDUCING SPEED OF AUTO-DOOR IN MACHINE TOOL}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auto door installed outside a complex machine tool (aka machining center) or other machine tool, and more particularly, to a deceleration control device capable of appropriately decelerating a moving speed of an auto door at a desired point.

The auto door installed in the multi-task machine is installed outside the machine tool to prevent chips or coolants generated from the work area of the machine tool from scattering to the outside.

1 shows a multi-task machine equipped with an auto door.

As shown, the auto door 10 is attached to the outer surface of the multi-task machine 1 to effectively block the work area 20 and the outside. The auto door 10 is opened and closed through the door switch of the operation panel 30 attached to one side of the machine tool. That is, in order to open the closed auto door or to close the open auto door, the operator touches the door switch of the operation panel.

Unlike the manual door, the auto door can be operated by manipulating the switch without manpower, but it is convenient. However, since the operating speed cannot be arbitrarily adjusted, a large impact sound is generated during opening or closing.

2 shows such a conventional autodoor.

The opening confirmation sensor 40 is attached to the point where the auto door 10 is opened, and the closing confirmation sensor 50 is attached to the point where the auto door 10 is closed. When the point is reached, these sensors are activated.

When the opening and closing confirmation sensors 40 and 50 are operated in this way, the controller inside the machine tool or the controller of the CNC device is stopped by reducing the operating speed of the auto door.

Reference numeral 11 in FIG. 2 denotes a window mounted on the auto door, and 12 denotes a handle.

3 shows a block configuration of a cylinder assembly 60 for generating pneumatic pressure for auto door driving.

As shown, a solenoid valve 62 is connected to the ports A and B side of the air cylinder 61, and the air service unit 64 and the silencers 63a and 63b are connected to the solenoid valve 62. It is connected.

In such a state, the compressed air flows into the port A or B of the air cylinder 61 according to the switching position of the solenoid valve 62 to advance the piston rod 65 back and forth to open and close the auto door.

The above-mentioned opening and closing confirmation sensors 40 and 50 and the cylinder assembly 60 are installed inside the machine tool 1 of FIG.

It is an object of the present invention to ensure that no loud impact sounds are produced when the auto door is opened or closed.

In order to achieve this object, the present inventors have developed a deceleration control device that can reduce the running speed of the auto door at the final moment of closing or opening the auto door.

Auto door deceleration control device according to claim 1 of the present invention is installed on the front of the machine tool is operated by pneumatic pressure; A first door sensor installed at a first deceleration point spaced apart from the opening point at which the auto door is completely opened in a direction of operation of the auto door; A second door detection sensor installed at a second deceleration point spaced apart from the closing point at which the auto door is completely closed in a direction of operation of the auto door; A cylinder assembly for opening and closing the auto door by pneumatic pressure; The control unit may include a control unit that adjusts the hydraulic pressure of the cylinder assembly in response to input signals from the first and second door detection sensors. When the first and second deceleration points are reached before the auto door is completely opened and closed, the control unit It is characterized by reducing the operating speed of the auto door by reducing the hydraulic amount of the cylinder assembly.

In addition, the auto door deceleration control method according to claim 3 of the present invention is an opening and closing confirmation sensor which is respectively installed at the opening and closing points of the automatic door, and the opening and closing confirmation sensor from the opening and closing confirmation sensor in a predetermined interval in the operation direction of the automatic door. An auto door comprising first and second door detection sensors provided at first and second deceleration points, the first step of determining whether the auto door is operating at a normal speed; A second step of determining whether the auto door is open or closed; A third step of decelerating the opening speed when the auto door reaches the first deceleration point while opening and decelerating the closing speed when the auto door reaches the second deceleration point during closing; And a fifth step of stopping the door when an opening confirmation signal or a closing confirmation signal arrives from the opening and closing confirmation sensor during the deceleration movement of the auto door.

Other objects and advantages of the invention will be described below and will be appreciated by the practice of the invention. Furthermore, the objects and advantages of the present invention can be realized by means and combinations indicated in the appended claims.

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate the presently preferred embodiments of the invention and, together with the description of the following preferred embodiments, serve to explain the principles of the invention.

1 is an external perspective view of a composite machine tool installed with the automatic door of the present invention.

Figure 2 is an external configuration diagram of a conventional auto door with an opening and closing confirmation sensor attached.

3 is a block diagram of a cylinder assembly for driving the auto door of FIG.

Figure 4 is an external configuration of the auto door of the present invention with a door detection sensor attached to the deceleration point.

5 is a block diagram of a cylinder assembly for driving an autodoor of the present invention.

6 is a functional block diagram for explaining the auto door deceleration control apparatus of the present invention.

7 is a flowchart for explaining the auto door deceleration control method of the present invention.

<Description of the symbols for the main parts of the drawings>

110: open confirmation sensor 120: first door detection sensor

140: closing confirmation sensor 130: second door detection sensor

180: control unit 162: solenoid valve

165: flow control valve

Hereinafter, with reference to the accompanying drawings will be described a specific embodiment of the auto door deceleration control device and deceleration control method of the present invention.

Figure 4 is an external configuration of the auto door of the present invention with a door sensor attached. FIG. 5 is a block diagram of a cylinder assembly providing pneumatic pressure for driving an auto door of the present invention, and FIG. 6 is a schematic block diagram of an autodoor deceleration control device of the present invention.

As shown in FIG. 4, the auto door 100 of the present invention has a predetermined interval from the opening confirmation sensor 110 and the closing confirmation sensor 140 in addition to the conventional opening confirmation sensor 110 and the closing confirmation sensor 140. Two new sensors are located at a remote location.

The first door detection sensor 120 is installed at a point (hereinafter, the first deceleration point) spaced a predetermined distance from the opening confirmation sensor 110 in the direction in which the auto door is operated, and is automatically closed from the closing confirmation sensor 140. A second door detection sensor 130 is installed at a point spaced apart from the predetermined distance in the direction in which the door operates (hereinafter, the second deceleration point).

The first and second deceleration points are preferably positions where the impact sound may be minimized by decelerating the running speed of the auto door immediately before the auto door is completely opened or just before being completely closed.

The first and second door detection sensors 120 and 130 are preferably proximity switches that switch by non-contact operation. Of course, any contact switch or other sensor capable of the same function is possible.

5 shows a cylinder assembly 160 that provides pneumatic pressure as a driving force for driving an autodoor.

In the case of the cylinder assembly of FIG. 5, a pair of flow control valves 165a and 165b are attached to the cylinder assembly. These flow control valves 165a and 165b are for controlling the flow rate of the compressed air supplied through the solenoid valve 162.

In the cylinder assembly 160 of FIG. 5, the flow control valves 165a and 165b and the solenoid valve 162 are connected to the ports A and B of the air cylinder 161, respectively. The air service unit 164 and the silencers 163a and 163b are connected.

In such a state, the compressed air flows into the port A or B of the air cylinder 161 according to the switching position of the solenoid valve 162 to advance the piston rod 165 forward and backward to open and close the auto door 100. have.

In addition, by appropriately adjusting the solenoid valve 162 and the flow control valves 165a and 165b according to the control signal from the control unit 180, the running speed of the auto door 100 can be reduced to a desired degree.

6 is a schematic block diagram of the auto door deceleration control apparatus of the present invention.

As shown, the sensing signals of the closing confirmation sensor 140, the opening confirmation sensor 110, the first and second door detection sensors 120 and 130 are input to the control unit 180. In addition, the input signal of the door switch 170 in the operating panel of the machine tool is also input to the control unit 180.

The control unit 180 is a controller inside a machine tool or a controller of a CNC device.

When the sensing signal is input as described above, the control unit 180 adjusts the flow direction control valves 165a and 165b and the solenoid valve 162 of FIG. 5 to appropriately adjust the driving direction and the driving speed of the auto door 100.

Hereinafter, the auto door deceleration control method of the present invention will be described in detail with reference to the above configuration and FIG. 7.

Step ST1: When the operator touches the door switch 170 of the operation panel to open or close the auto door 100 (ST1), this door opening / closing signal is input to the control unit 180.

Step ST2: When the door open / close signal is input, the control unit 180 determines whether the open / close signal is a door open signal or a door closed signal. When the closing confirmation sensor 140, the opening confirmation sensor 110, the first door detection sensor and the second door detection sensor 120 and 130 are all in the ON state, the door is in a closed state and the door is opened and closed. The signal becomes a door open signal.

On the other hand, when the closing confirmation sensor 140, the opening confirmation sensor 110, the first door detection sensor 120 and the second door detection sensor 130 are all in an OFF state, the door is open. At this time, the door opening and closing signal is a door closing signal.

Here, the sensor on state defines a case where the proximity switch detects an object, and the sensor off state defines a case where the proximity switch does not detect an object.

Step ST3: When it is determined that the door opening signal is determined in step ST2, the control unit 180 controls the solenoid valve 162 so that the compressed air is injected into the B port of the air cylinder 161 to open the door at a constant speed, If it is determined as a door closing signal, compressed air is injected into the A port of the air cylinder 161 to close the door at a constant speed.

Steps ST4 and ST5: When the first door detection sensor 120 is turned off while the auto door 100 is opened at a constant speed, the control unit 180 controls the flow control valves 163a and 163b and the solenoid valve 162. Decelerate the running speed of the auto door 100.

On the other hand, when the second door detection sensor 130 is turned on while the auto door is closed at a constant speed, the control unit 180 controls the flow control valves 163a and 163b and the solenoid valve 162 to open the auto door 100. Slows down the running speed.

Steps ST6 and ST7: If the opening confirmation sensor 110 is turned off or the closing confirmation sensor 140 is turned on during the deceleration, the control unit 180 controls the cylinder assembly 160 to stop the door by stopping supply of pneumatic pressure. .

As described above, in the present invention, the noise may be minimized by reducing the impact force by reducing the running speed of the door before the door is completely opened or closed.

The present invention is not limited to the above-described embodiments, and various modifications and variations are made by those skilled in the art to which the present invention pertains without departing from the spirit and scope of the present invention. Of course it is possible.

The present invention can reduce the impact sound generated by the impact when the door is opened or closed by reducing the speed of the door near the point where the impact occurs.

Claims (4)

An auto door installed at the front of the machine tool and operated by pneumatic pressure; A first door sensor installed at a first deceleration point spaced apart from the opening point at which the auto door is completely opened in a direction of operation of the auto door; A second door detection sensor installed at a second deceleration point spaced apart from the closing point at which the auto door is completely closed in a direction of operation of the auto door; A cylinder assembly for opening and closing the auto door by pneumatic pressure; And a control unit for adjusting the compressed air flow rate of the cylinder assembly according to input signals from the first and second door detection sensors, As a result, when the moving auto door reaches the first and second deceleration points, the operating speed of the auto door is automatically reduced. The method of claim 1, And the first and second door detection sensors are proximity switches that switch by non-contact operation. A first step of controlling the cylinder assembly 160 to open or close the door at a constant speed when the operator turns on the open or close switch; When the signal of the first door sensor 120 or the second door sensor 130 is detected while the door is opened or closed at a constant speed, a second step of controlling the cylinder assembly 160 to slow down the running speed of the door; ; And a third step of stopping the door when a signal of the opening confirmation sensor (110) or the closing confirmation sensor (140) is detected during the deceleration operation. The method of claim 3, wherein The first and second door detection sensors 120 and 130 used in the second step, the signals of the sensors 120, 130 are all on or off, the deodorization of the door is characterized in that Control method.