JP7359616B2 - Machine Tools - Google Patents

Description

The present disclosure relates to machine tools.

2. Description of the Related Art A machine tool is known that detects the open/closed state of a door of the machine tool and uses the detection result as a condition for driving or stopping a coolant pump (see, for example, Patent Document 1).

Japanese Patent Application Publication No. 2015-20231

Coolant is used to reduce friction between a tool and a workpiece during machining, and can also be used to clean the inside of a machine tool. Coolant is supplied to the workpiece and tools from a nozzle provided on the spindle. That is, since the workpiece is being processed, the door of the machine tool is closed and the coolant pump is allowed to drive. On the other hand, the door of the machine tool may be open when cleaning the inside of the machine tool, and it is desirable that the coolant pump be allowed to drive in this case as well.

One aspect of the present disclosure is a manual cleaning nozzle that includes a door that can be opened and closed, a sensor that detects the open and closed state of the door, a processing injection nozzle that discharges coolant when processing a workpiece, and a handle that is operated by an operator. a coolant pump that is connected to the machining injection nozzle and the manual cleaning nozzle and sends out the coolant; This machine tool is equipped with a valve that selectively opens the gap between the injection nozzle and the injection nozzle during machining.

FIG. 1 is a schematic diagram of a machine tool according to an embodiment of the present disclosure, showing a state during processing. FIG. 2 is a schematic diagram showing the machine tool of FIG. 1 in a state during manual cleaning. FIG. 2 is a schematic diagram showing a modification of the machine tool shown in FIG. 1; 2 is a schematic diagram showing another modification of the machine tool of FIG. 1. FIG.

A machine tool 1 according to an embodiment of the present disclosure will be described below with reference to the drawings.
As shown in FIG. 1, the machine tool 1 according to this embodiment includes a box-shaped cover 2 having a door 3 that can be opened and closed.

Inside the cover 2, a table (not shown) on which a work is placed and a main shaft (not shown) for processing the work are arranged.
The machine tool 1 according to the present embodiment also includes a cutting coolant nozzle (injection nozzle during machining) 4 installed on the main shaft inside the cover 2, and a shower gun (manual cleaning nozzle) 5 operated by the operator P. It is equipped with

The shower gun 5 includes a handle 7 held by an operator P at the tip of a flexible hose 6. The handle 7 is equipped with a trigger (not shown) that is operated by the operator P to switch between discharging and stopping coolant discharge.

A coolant pan 8 is installed at the bottom of the cover 2 to store coolant that is sprayed from the cutting coolant nozzle 4 or the shower gun 5 and flows down inside the cover 2.
Further, a coolant pump 9 is arranged outside the cover 2 to send the coolant stored in the coolant pan 8 to the cutting coolant nozzle 4 or the shower gun 5.

The cover 2 is provided with a door switch (sensor) 10 that detects whether the door 3 is open or closed. The door switch 10 outputs a close signal when the door 3 is completely closed, and outputs an open signal when the door 3 is opened even slightly.

In this embodiment, a solenoid valve 11 is provided that branches piping from the coolant pump 9 to the cutting coolant nozzle 4 and the shower gun 5.
The solenoid valve 11 is connected to the door switch 10 and operates according to the open/closed state of the door 3 detected by the door switch 10.

That is, as shown in FIG. 1, when the door switch 10 detects that the door 3 is closed, the solenoid valve 11 opens the flow path from the coolant pump 9 to the cutting coolant nozzle 4. The flow path from the coolant pump 9 to the shower gun 5 is shut off. On the other hand, as shown in FIG. 2, when the door switch 10 detects that the door 3 is open, the solenoid valve 11 blocks the flow path from the coolant pump 9 to the cutting coolant nozzle 4. The flow path from the coolant pump 9 to the shower gun 5 is opened.

Thereby, the solenoid valve 11 selectively opens between the coolant pump 9, the shower gun 5, and the cutting coolant nozzle 4, depending on the open/closed state of the door 3 detected by the door switch 10.

The operation of the machine tool 1 according to this embodiment configured as described above will be explained.
According to the machine tool 1 according to the present embodiment, the door 3 provided on the box-shaped cover 2 is closed when processing the workpiece mounted on the table using the tool mounted on the spindle. In this case, since the door switch 10 which is a sensor detects the closed state of the door 3, the flow path between the coolant pump 9 and the cutting coolant nozzle 4 is opened by the operation of the solenoid valve 11, and the coolant pump 9 The flow path between the shower gun 5 and the shower gun 5 is closed.

Thereby, the coolant stored in the coolant pan 8 is assembled by the operation of the coolant pump 9, and is supplied to the tool and the workpiece from the cutting coolant nozzle 4 provided on the main shaft. As a result, heat generation during cutting is reduced due to lubrication between the tool and the workpiece, and the workpiece can be machined with high precision.

In this case, since the shower gun 5 is disposed inside the cover 2 with the door 3 closed, the operator P cannot grasp the handle 7 and therefore cannot discharge coolant.
Therefore, the coolant discharged from the cutting coolant nozzle 4 scatters only inside the cover 2 with the door 3 closed, and is prevented from scattering or leaking to the outside. The discharged coolant flows down inside the cover 2, is received by a coolant pan 8 disposed at the bottom of the cover 2, is circulated by a coolant pump 9, and is reused.

On the other hand, when the operator P wants to clean the space inside the cover 2, he opens the door 3 of the cover 2, grasps the handle 7 of the shower gun 5 held inside, and operates the trigger.
In this case, since the open state of the door 3 is detected by the door switch 10, the flow path between the coolant pump 9 and the cutting coolant nozzle 4 is cut off by the operation of the solenoid valve 11, and the flow path between the coolant pump 9 and the cutting coolant nozzle 4 is cut off. A flow path between the shower gun 5 and the shower gun 5 is opened.

Thereby, the operator P discharges coolant from the shower gun 5 by operating the trigger while bending the hose 6 and arbitrarily changing the discharge direction, thereby washing away chips and the like adhering to the inner wall of the cover 2. be able to.
In this case, although the door 3 of the cover 2 is open, the discharge of coolant from the shower gun 5 is controlled by the operator P, and the discharge of coolant from the cutting coolant nozzle 4 is prohibited. Therefore, even in this case, it is possible to prevent the coolant from scattering or leaking to the outside.

As described above, according to the machine tool 1 according to the present embodiment, it is possible to switch between discharging coolant during cutting and discharging coolant during cleaning by operating the single coolant pump 9. It has the advantage of being possible. Therefore, there is no need to prepare two coolant pumps 9, one for cutting and one for cleaning, and costs can be reduced.

In addition, the case where the shower gun 5 is installed inside the cover 2 and can be operated by the operator P only when the door 3 is opened is illustrated. Alternatively, the shower gun 5 may be installed outside the cover 2, inserted into the open door 3 from outside, and discharge the coolant.

Even in this case, when the door 3 is closed, the discharge of coolant from the shower gun 5 is prohibited. Therefore, if the discharge of coolant from the shower gun 5 is properly controlled by the operator P, it is possible to prevent the coolant from scattering or leaking to the outside.

Further, according to the present embodiment, as shown in FIG. 3, a filter 12 is provided in the pipeline between the coolant pump 9 and the solenoid valve 11 to remove dust (chips, sludge, etc.) inside the coolant pump 9. may be placed.
In addition, if it is necessary to clean the coolant pan 8 both during cutting and manual cleaning, as shown in FIG. It may also be connected to the cleaning nozzle 13.
Further, in a machine tool 1 in which a tank for storing coolant is installed outside the machine instead of the coolant pan 8, the cleaning nozzle 13 may clean the inside of the door 3 of the machine tool 1.

The coolant may be compressed air, water-soluble cutting fluid, water-insoluble cutting fluid, or a mixed gas of air and cutting fluid. Moreover, the structure of the shower gun 5 may be arbitrary.

1 Machine tool 3 Door 4 Cutting coolant nozzle (spray nozzle during machining)
5 Shower gun (manual cleaning nozzle)
7 Handle 8 Coolant pan 9 Coolant pump 10 Door switch (sensor)
11 Solenoid valve (valve)
12 Filter 13 Cleaning nozzle P Operator

Claims (3)

A door that can be opened and closed,
a sensor that detects the open/closed state of the door;
A machining injection nozzle that discharges coolant when machining a workpiece;
a manual cleaning nozzle with a handle operated by an operator;
a coolant pump connected to the machining injection nozzle and the manual cleaning nozzle and delivering the coolant;
A valve that selectively opens between the coolant pump and the manual cleaning nozzle or between the coolant pump and the machining injection nozzle depending on the open/closed state of the door detected by the sensor. Equipped with machine tools. The machine tool according to claim 1, wherein a filter is disposed between the coolant pump and the valve. The machine tool according to claim 2, wherein a cleaning nozzle for cleaning the inside of the door is connected to a conduit between the filter and the valve.

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