KR20000015345U - Chuck clamp checking device of numerical control lathe - Google Patents

Abstract

The present invention extends the sensing dog so that the clamp can be judged only when all the proximity switches that can detect unclamps, clamps and overclamps of the chuck are in the "ON" state. The present invention relates to a chuck clamp checking device of a numerical control lathe capable of preventing the chuck clamping from being prevented. When the sensing dog 37 is located in the sensing area F1 (F2), it outputs an "ON" signal. If 37 is not located in the sensing area F1 (F2) or the power supply is cut off, the numerical control shelf having a plurality of first proximity switches PX11 and second proximity switches PX12, which are in the " OFF " state. In the chuck clamp confirmation device, both the first proximity switch PX11 and the second proximity switch PX12 are located in the sensing region F1 (F2) when the sensing dog 37 is placed in the clamp position C. It is configured to extend as possible.

Description

Chuck clamp checking device of numerical control lathe

The present invention relates to a chuck clamp checking device of a numerical control shelf. More specifically, the proximity switch, which is capable of detecting an unclamp, a clamp, an overclamp, etc. of the chuck by extending the sensing dog, is in an "ON" state. The present invention relates to a chuck clamp check device for a numerical control shelf that can be judged by a clamp only to prevent malfunction due to a failure of a proximity switch or the like.

In general, as shown in FIGS. 1 and 2, the main shaft of the numerical control lathe is provided with a chuck 11 at the front end of the main shaft 13 and a rotation cylinder 15 at the rear end thereof, respectively. The draw pipe 14 penetrating the main shaft 13 is installed between the rotary cylinder 15 and the rotary cylinder 15 to transmit the linear movement of the rotary cylinder 15 to the chuck 11. ) Was configured to clamp or unclamp the workpiece with radial movement.

In addition, a coolant tray 22 is provided at the rear of the rotary cylinder 15, and the first proximity switch PX1 and the second proximity switch PX2 are provided on the outside of the coolant tray 22 by a switch adjusting plate 19. ) Was installed.

In addition, the sensing dog 17 is assembled to the rear of the piston 16 of the rotary cylinder 15 so that the linear movement of the rotary cylinder 15 is detected by the first proximity switch PX1 and the second proximity switch PX2. It was composed.

Such a conventional chuck clamp confirming device is to check the unclamped state of the chuck 11 with one first proximity switch (PX1), the remaining second proximity switch (PX2) to check only the over-clamp state, the first proximity switch When both PX1 and the second proximity switch PX2 were "OFF", it was made to recognize as a clamp state.

However, if any one of the first proximity switch PX1 and the second proximity switch PX2 fails and becomes inoperable, the actual chucking state and the electrical determination result are different from each other and the workpiece is transferred to the chuck 11. Even without being clamped, the spindle was rotated or the tool approached a very dangerous condition.

For example, when one or both of the two first proximity switches PX1 and the second proximity switch PX2 fail as shown in FIG. 3, the sensing dog 17 is moved to the sensing area. The first proximity switch PX1 and the second proximity switch PX2, which caused a failure even when approaching, output an “OFF” condition unconditionally, so the workpiece is recognized as a clamp state even though the workpiece is not clamped. It had a problem of becoming a very dangerous situation such as flying away from the chuck 11.

On the other hand, since the distance between the first proximity switch PX1 and the second proximity switch PX2 cannot be adjusted, there is a problem that the sensitivity of the operation cannot be optimally adjusted according to the condition of the machine.

The present invention has been made to solve the above problems, the object of which is that even if a plurality of proximity switches that can detect the unclamp, overclamp, clamp state of the workpiece by the chuck causes one or more failures It is possible to prevent a safety accident by not recognizing the clamp state of the workpiece, and to provide a chuck clamp check device of a numerical control shelf that can finely adjust the sensitivity of the proximity switch.

In order to achieve the object of the present invention, when the sensing dog is located in the sensing area, it outputs an "ON" signal, and when the sensing dog is not located in the sensing area or the power supply is cut off, A chuck clamp check device of a numerically controlled shelf having a first proximity switch and a second proximity switch, wherein the sensing dog extends so as to be positioned in both sensing areas of the first proximity switch and the second proximity switch when the sensing dog is placed in the clamp position. It is formed and formed.

1 is a cross-sectional view showing the chucking portion of the main shaft in the conventional numerical control lathe

2 is an enlarged cross-sectional view of portion A of FIG.

3 is a diagram showing the "ON" or "OFF" state of the proximity switch according to the state of the conventional chuck

Figure 4 is a cross-sectional view showing that the unclamp is detected by the chuck clamp confirmation device according to the present invention

5 is an enlarged cross-sectional view of portion B of FIG.

6 is a cross-sectional view showing that the clamp is detected by the chuck clamp confirmation device according to the present invention

7 is a cross-sectional view showing that the over clamp is detected by the chuck clamp confirmation device according to the present invention

8 is a diagram showing the "ON" or "OFF" state of the proximity switch according to the state of the chuck in the present invention

* Explanation of Signs of Major Parts of Drawings *

35: rotating cylinder 36: cylinder piston

37: detection dog 39: control panel

PX11: 1st proximity switch PX12: 2nd proximity switch

42: coolant receiver C: clamp position

F1, F2: Detection zone 60: Long hole

W: spacing

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 is a cross-sectional view showing that the unclamp is detected by the chuck clamp checker according to the present invention, Figure 5 is an enlarged cross-sectional view of the portion B of Figure 3, Figure 6 is a chuck clamp checker according to the present invention 7 is a cross-sectional view showing that the overclamp is detected, Figure 7 is a cross-sectional view showing that the clamp is detected by the chuck clamp confirmation device according to the present invention, as shown in the detection dog 37 is detected area (F1) (F2) ), It outputs an "ON" signal, and when the sensing dog 37 is not located in the sensing area F1 (F2) or the power supply is cut off, the plurality of first proximity switches are turned "OFF". (PX11) and second proximity switch (PX12) having a conventional configuration, when the sense dog 37 is placed in the clamp position (C) the first proximity switch (PX11) and the second proximity switch Extends so as to be positioned at both sensing areas F1 and F2 of PX12; Castle was.

Further, the first proximity switch PX11 is formed by forming a long hole 60 parallel to the direction of movement of the sensing dog 37 in the coolant receiver 42 in which the first proximity switch PX11 and the second proximity switch PX12 are installed. ) And the distance W between the second proximity switch PX12 can be adjusted.

The above configuration is based on clamping the outer diameter of the workpiece. On the contrary, when clamping the inner diameter of the workpiece, the same result as when clamping the outer diameter can be obtained by connecting to a signal conversion circuit that inverts the signal. .

Hereinafter, the operation according to the present invention will be described in detail with reference to the accompanying drawings.

First, as shown in FIGS. 4 and 5, the detection dog 37 is stopped in front of the first proximity switch PX11 by the cylinder piston 36 of the rotary cylinder 35. If only the detection area F1 of PX11 is invaded, the first proximity switch PX11 is in the "ON" state and the second proximity switch PX12 is in the "OFF" state as shown in the diagram of FIG. The controller (not shown) recognizes that the workpiece (not shown) bitten by (not shown) is unclamped.

6, the sensing dog 37 is stopped in front of the first proximity switch PX11 and the second proximity switch PX12 by the cylinder piston 36 of the rotary cylinder 35, as shown in FIG. When both of the sensing areas F1 and F2 of the first proximity switch PX11 and the second proximity switch PX12 are invaded, the first proximity switch PX11 and the second proximity switch P as shown in the diagram of FIG. The control unit recognizes that the PX12) is all "ON" and the workpiece is clamped by the chuck.

In addition, as shown in FIG. 7, the sensing dog 37 passes through the first proximity switch PX11 by the cylinder piston 36 of the rotary cylinder 35, and in front of the second proximity switch PX12. If it stops and invades only the sensing area F2 of the second proximity switch PX12, the first proximity switch PX11 is in the "OFF" state as shown in the diagram of FIG. 8, and the second proximity switch PX12 Is turned "on" so that the control section recognizes that the workpiece being bitten by the chuck has been overclamped.

Meanwhile, when the first proximity switch PX11 and the second proximity switch PX12 are fixed while moving to the long hole 60 formed in the cutting oil receiver 42, the interval W may be arbitrarily adjusted.

The present invention as described above is configured to recognize the clamp state when the proximity switch is all in the "ON" state, there is an effect that can prevent the malfunction when the proximity switch causes one or more failures, proximity switch Since the position adjustment operation of the can be made more simple, there is an effect that can make the repair and inspection easier.

Claims (2)

If the sensing dog 37 is located in the sensing area F1 (F2), it outputs an "ON" signal, and if the sensing dog 37 is not located in the sensing area F1 (F2) or the power supply is cut off. In the chuck clamp confirmation device of a numerical control lathe having a plurality of first proximity switches (PX11) and second proximity switches (PX12) to be in the "OFF" state, When the sensing dog 37 is placed in the clamp position (C), it is extended so as to be located both in the sensing region (F1) (F2) of the first proximity switch (PX11) and the second proximity switch (PX12). Chuck clamp checking device of numerical control lathe. A long hole 60 parallel to the direction of movement of the sensing dog 37 is formed in the coolant receiver 42 on which the first proximity switch PX11 and the second proximity switch PX12 are installed, so that the first proximity switch PX11 and the first proximity switch PX11 are formed. Chuck clamp confirmation device of a numerical control shelf, characterized in that configured to adjust the interval (W) between the second proximity switch (PX12).