JP2591428Y2 - Rotary tool contact confirmation device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for confirming close contact of a rotary tool in a cutting machine using a rotary tool such as a turning center or a machining center.

[0002]

2. Description of the Related Art Turning centers and machining centers are equipped with an automatic tool changer, and a rotary tool mounted in a rotary tool mounting hole of a spindle is automatically changed according to a type of machining.

[0003]

However, there is no means for confirming whether or not the replaced rotary tool has been properly mounted in the rotary tool mounting hole of the spindle. May occur. In the case of a fixed tool such as a cutting tool in a lathe, it is easy to provide a checking means because it is fixed to the tool post, and various checking means have been conventionally provided. However, in the case of a rotary tool, it is difficult to provide a confirmation means because it is attached to the spindle, and development of a confirmation means is awaited.

An object of the present invention is to provide a rotary tool contact confirmation device which can confirm that a rotary tool is correctly mounted on a spindle in a close contact state.

[0005]

The rotary tool contact confirmation device of the present invention is provided with an air outlet on a tool positioning surface of a rotary tool mounting hole of a spindle, and a back of an air supply path for sending compressed air to the air outlet. The apparatus is provided with a contact detection sensor for detecting pressure and confirming contact. The air supply path is a path for sending compressed air from the housing supporting the spindle to the air outlet. The air supply path in the spindle, which is the air supply path, and the air supply path in the housing are connected by a coupling. The coupling is provided with a perforated piston whose position can be freely changed between a forward position communicating with an air inlet opened rearward of the air supply path in the spindle and a retracted position away from the air inlet of the spindle, and a coupling of the housing. In the air supply path
And a rear surface of the piston is provided with air in the housing.
The pressure of the supply air for checking the adhesion supplied to the supply path
And a hole provided in the piston.
The piston is elastically urged to the retracted position, and advances to the advanced position against the elasticity by air supply for confirming the close contact.

[0006]

When the rotary tool is correctly mounted in the rotary tool mounting hole of the spindle, the rotary tool comes into close contact with the tool positioning surface of the rotary tool mounting hole. Due to this close contact, the pressure of the compressed air sent from the air supply path to the air outlet of the tool positioning surface, that is, the back pressure of the air outlet rises to a predetermined value or more, and rotation is detected by the close contact detection sensor. The close contact of the tool is automatically checked. In the case of improper mounting of the rotary tool, air leaks from the air outlet and the back pressure does not rise to a predetermined value, and the poor contact is detected by the close contact detection sensor.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 2 is a perspective view of a turning center equipped with the rotary tool contact confirmation device of this embodiment. The turning center includes a main spindle 1 having a fixed position, a sub-spindle 2 movable in two axes (X-axis, Z-axis) facing the main spindle 1, a turret 3, a milling head 4, a tool changer 5 The milling head 4 is applied with the rotary tool close contact checking device of the present invention. The work held on the main spindle 1 can be machined by any tool of the turret 3 and the milling head 4, and can be machined by being held by the sub-spindle 2. Tool changer 5
Is to exchange a tool of the milling head 4 with an arbitrary tool of the tool magazine 7 by the exchange arm 6.

FIG. 1 is a partial vertical sectional view of the milling head 4. The spindle 8 of the milling head 4 has a tapered rotary tool mounting hole 9 at the shaft end. A tool positioning surface 9a for receiving a flange 10a of the rotary tool 10 is formed around the opening of the hole 9. The rotary tool 10 includes a spindle 8
The pull bar 1 at the rear of the drawbar 11
0b is engaged and retracted, and the flange 10a is mounted in a state of being in close contact with the tool positioning surface 9a. An air outlet 20b for checking adhesion is opened in the tool positioning surface 9a,
An air supply path 20 in the spindle is provided to open from the outer peripheral surface of the spindle 8 to the air outlet 20b.

The spindle 8 is rotatably supported by a milling head housing 14 via bearings 12 and 13, and is rotatably driven at the rear by a motor (not shown).
The air supply path 20 in the spindle communicates with the external air supply path 27 through the coupling 15 provided in the housing 14 and the air supply path 21 in the housing part, and the air source 2
4 is connected. The coupling 15 is a cylinder 1
The cylindrical piston 17 includes a cylindrical piston 17 provided to be able to move forward and backward, and a spring 19 for urging the cylindrical piston 17 toward the stopper 18 of the cylinder 16. One end of the cylindrical piston 17 is opposed to the back surface of the flange of the spacer 8 a provided on the outer periphery of the spindle 8, and the portion of the cylinder 16 on the stopper 18 side is communicated with the housing part air supply path 21.

An air inlet 20a is opened at a position corresponding to the cylindrical piston 17 on the back surface of the spacer 8a, and communicates with the air supply path 20 in the spindle. The close contact detection sensor 22 including a gap sensor or a pressure switch is provided in the external air supply path 27, and an on-off valve 25 and a pneumatic filter 23 are interposed.

The operation of the above configuration will be described. Spindle 8
During the rotation of, the on-off valve 25 is closed and the supply of compressed air from the air source 24 is stopped. As a result, the cylindrical piston 17 in the coupling 15 is pressed against the stopper 18 by the urging force of the spring 19, and a gap is formed between the cylindrical piston 17 and the rear surface of the flange of the spacer 8 a attached to the spindle 8. Is kept. Therefore, it is possible to prevent the cylindrical piston 17 from hindering the rotation of the spindle 8.

At the time of tool change, the on-off valve 2
5 is opened to supply air. However, the rotational position of the spindle 8 is determined so that the air inlet 20a of the spacer 8a faces the cylindrical piston 17 of the coupling 15.
By supplying the air in this manner, the cylindrical piston 17 moves forward against the spring 19 by the air pressure in the cylinder 16 and is pressed against the back surface of the spacer 8 a of the spindle 8. Therefore, the compressed air is supplied from the air supply path 20 in the spindle to the air outlet 20 b via the cylindrical piston 17. If the rotary tool 10 is correctly mounted, the flange 10a is in close contact with the tool positioning surface 9a and closes the air outlet 20b, so that the back pressure at the air outlet 20b increases to the set pressure of the close contact detection sensor 22. For this reason, the contact detection sensor 22 is turned on, and it is confirmed that the contact state is established.

If the mounting of the rotary tool 10 is incomplete,
The flange a does not adhere to the tool positioning surface 9a, and compressed air leaks from the air outlet 20b. Therefore, the back pressure does not rise to the set pressure, and the close contact detection sensor 22 does not turn on. From this result, it is determined that the mounting of the rotary tool 10 is incomplete. If the close contact detection sensor 22 does not turn on at a predetermined time, an alarm is generated to notify the operator and the processing operation is stopped.

When a gap sensor is used as the close contact detection sensor 22, it is set to turn off at a gap of, for example, 0.05 mm or more. Thus, when the gap between the rotary tool 10 and the positioning surface 9a is 0.05 or more, the switch is not turned on, and an alarm is generated.

[0015]

According to the rotary tool close contact checking device of the present invention, an air outlet is provided on a tool positioning surface of a rotary tool mounting hole of a spindle, and an air supply path for sending compressed air to the air outlet is provided with an air outlet. due to the provision of a contact detection sensor for detecting and adhesion check back pressure, can verify that the rotary tool is in close contact correctly to the spindle, Ru prevents processing defective products due to insufficient adhesion. Also in the spindle
Connect the air supply path to the air supply path in the housing
Behind the air supply path in the spindle as a coupling
Forward position communicating with the air inlet that opens in
The position can be freely changed to the retracted position away from the dollar air inlet
A perforated piston is provided in the housing, and the piston
Is elastically urged to the retracted position, and the air supply
Feed to advance to the advance position against the elasticity.
As a result, it does not hinder the rotation of the spindle and
The coupling is connected by the air supply for confirming the arrival.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional view of a milling head equipped with a rotary tool contact confirmation device according to an embodiment of the present invention.

FIG. 2 is a perspective view of a turning center provided with the rotary tool adhesion confirmation device.

[Explanation of symbols]

Reference numeral 8: spindle, 9: rotary tool mounting hole, 9a: tool positioning surface, 10: rotary tool, 10a: flange, 15: coupling, 20: air supply path in the spindle, 20a: air inlet, 20b: air outlet , 22: Close contact detection sensor, 25: Open / close valve, 27: External air supply path

Claims (1)

(57) [Scope of request for utility model registration] An air outlet is provided on a tool positioning surface of a rotary tool mounting hole of a spindle, an air supply path for sending compressed air from a housing supporting the spindle to the air outlet is provided, and the air supply path is provided on the air supply path. A coupling detection sensor is provided for detecting the back pressure of the air outlet to confirm the adhesion, and a coupling is provided for connecting the air supply path in the spindle, which is the air supply path, to the air supply path in the housing. The ring has a perforated piston whose position can be freely changed between a forward position communicating with an air inlet opened backward of the air supply path in the spindle and a retracted position away from the air inlet of the spindle ,
The piston in an air supply path of the housing;
The rear surface was supplied to the air supply path of the housing.
Check the surface on which the pressure of the supply air
A rotary tool having an opening in a hole provided in the ton, wherein the piston is elastically urged to a retracted position, and advances to the advanced position against the elasticity by air supply for confirming close contact. Adhesion confirmation device.