JPS5828747Y2 - Tool mounting hole cleaning device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a cleaning device that removes chips, dust, etc. that have entered and adhered to the tool mounting hole provided at the tip of the spindle.The purpose of the present invention is to remove foreign matter that has entered the tool mounting hole. The object of the present invention is to improve the mounting accuracy of tools, improve the working environment, and facilitate the maintenance and management of cleaning equipment.

In general, a machine tool having an automatic tool changer has a tapered hole, that is, a tool mounting hole, drilled at the tip of its rotating spindle. Machining operations are carried out, but the chips generated by this machining operation and dust floating in the air adhere to the inner wall of the tool mounting hole and become a friction material when the tool is attached and removed, causing wear on the inner circumferential surface of the tool mounting hole. This caused deformation and reduced fitting accuracy.

Conventionally, in order to remove foreign matter such as chips and dust, compressed air is introduced when a tool holder is installed into and removed from the tool mounting hole to scatter the foreign matter outside the tool mounting hole. Ta.

However, in such a device, foreign matter is not only scattered around the machine but also mixed with the compressed air and scattered in the air, deteriorating the working environment.

It is also known to remove foreign matter by inserting a wiping member into the tool mounting hole, but it is necessary to replace the wiping member to which foreign matter has adhered.

In order to solve the conventional problems, the present invention provides a dust suction member with a plurality of dust suction holes at the tip of the swing arm, and when this dust suction member is inserted into the tool mounting hole, it creates a negative pressure in the dust suction holes to remove foreign particles. The present invention provides a cleaning device for a tool mounting hole, which is capable of suctioning and removing tools.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a perspective view of a machine tool in which the device according to the present invention is implemented, in which 1 is an upright column, 2 is a shaft head that moves up and down guided by this column 1, and 3 is rotated by the shaft head 2. A main shaft is freely mounted on the shaft, 4 is an automatic tool changer for transferring tools from the tool magazine of the circuit to the main shaft 3, and A is a cleaning device.

This cleaning device A will be explained with reference to FIG. The main shaft 3 is rotatably supported by a bearing 10 in the shaft head 2, and a gear 11 fitted to the main shaft 3 transmits the rotational force of a drive source (not shown) to a tool in the circuit.

An adapter 12 is fixed to the tip of the main shaft 3, and a tapered hole 13, which is a tool mounting hole, is bored in the adapter 12.

A tool holder (not shown) having a tapered outer peripheral surface that fits into the tapered hole 13 is detachably attached thereto.

Reference numeral 15 denotes a tool gripping device that firmly grips the tension bolt head of the circuit screwed onto the tip of the tool holder to securely attach and fasten the tool holder to the taper hole 13.

An operating rod 20 that is movable and rotatable in parallel with the axis of the main shaft 3 is mounted on the shaft head 2, and this operating rod 20 is connected to a piston 22 that is slidably housed in a fluid pressure cylinder 21. They are connected via a rod 23 and a link 24.

The operating rod 20 and the link 24 are interconnected so that rotation is permitted but axial movement is not possible.

Furthermore, a spline 25 is formed on the outer peripheral surface of the rod 20, and a rack 26 is engaged with the spline 25.
This rack 26 is adapted to rotate the actuating rod 20 about this axis by means of the hydraulic cylinder of the circuit.

A swing arm 27 is fixed to one end of the actuating rod 20 and extends substantially perpendicular to the axis.

A dust suction member 28 is integrally formed at the tip of the swing arm 27 at a position where its axis coincides with the axis of the main shaft 3,
The vertical cross-sectional shape of the dust suction member 28 has the same slope as the taper portion of the tool holder, and has a slightly smaller diameter (1 to 2 m11L).

A center hole 30 is formed in the dust suction member 28, and the center hole 30 is connected to a plurality of dust suction holes 31 formed at a predetermined pitch in the tapered outer peripheral surface 29 of the dust suction member 28, respectively.

The center hole 30 is connected to the negative pressure generator 3 through a passage 32 in the swing arm 27 and a passage 33 in the actuating rod 20.
Connected to 4.

The shaft head 2 is provided with a bolt-type stopper 50 that restricts the insertion end position of the dust suction member 28 into the tool mounting hole (as shown in FIG. 2), and a bolt-type stopper 51 that restricts the rotational position of the dust suction member 28. (Fig. 3) are provided respectively.

The operation in the above configuration will be explained.

The swing arm 27 of the cleaning device A is in a retracted position (the state shown in FIG. 1) where it does not interfere with the machining operation except during the cleaning operation.

Now, when a cleaning work start command is issued, pressure oil is supplied from the fluid pressure source of the circuit to the rod side chamber 21a of the cylinder 21 via the switching valve, and the piston 22 slides to the left in the figure, causing the dust suction member 28 to move. One end moves leftward to a position where it does not collide with the adapter 12 when the swing arm 27 rotates, and is stopped.

Next, pressure oil is supplied from the fluid pressure source of the circuit to the fluid pressure cylinder of the circuit through the switching valve to operate the rank 26, thereby causing the swing arm 27 to rotate together with the rotation of the operating rod 20.

When the dust suction member 28 at the tip of the swing arm 27 reaches a position where it contacts the main shaft 3, the supply of pressure oil to the hydraulic cylinder is stopped, and the swing end of the swing arm 21 is positioned by the stopper 51.

Subsequently, pressure oil is supplied to the piston side chamber 21b of the cylinder 21, the piston 22 slides to the right in the figure, the dust suction member 28 advances inside the taper hole 13 of the main shaft, and when it reaches the entry end, the piston 22 is stopped (state shown in Figure 2).

The entry end of the dust suction member 28 is positioned by a stopper 50, and as a result, the tapered outer peripheral surface 2 of the dust suction member 28
A predetermined interval is formed between the tapered hole 9 and the inner surface of the tapered hole 13.

Next, the negative pressure generator 34 is activated to create a negative pressure in the dust suction hole 31 of the dust suction member 28 through the passages 32, 33 and the center hole 30, and chips that have entered and adhered to the inner surface of the taper hole 13 of the main shaft 3 are generated. Also, dust and the like are peeled off and sucked from the inner surface by the negative pressure and collected in the negative pressure generating device 34.

When the cleaning work for a certain period of time is finished, the operation of the negative pressure generator 34 is stopped, pressure oil is supplied to the rod side chamber 21a of the cylinder 21, the piston 22 slides to the left in the figure, and the dust suction member 28 is removed from the tapered hole 13 and stopped.

Next, pressure oil is supplied to the hydraulic cylinder of the circuit and the rack 26
is operated in the opposite direction to that described above, and as a result, the rotating arm 27 is rotated in the opposite direction as the operating rod 20 is rotated, and this rotating arm 27 is retracted to a position where it does not interfere with machining.

When the swing arm 27 reaches the rotation end, the supply of pressure oil to the hydraulic cylinder is stopped, and the swing arm 27 stops rotating.

Subsequently, pressure oil is supplied to the piston side chamber 21b of the cylinder 21, and the piston 22 slides to the right in the figure, moving the dust suction member 28 to the rearward end and stopping.

Upon completion of this retraction, a tool change command is issued and the taper hole 1
At step 3, the automatic tool changer 4 starts mounting the next tool to be used.

The taper hole 13 for mounting the tool may be a straight hole.

As mentioned above, the tool mounting hole cleaning device according to the present invention has the following features:
A dust suction member with a plurality of dust suction holes is provided at the tip of the swing arm, and when this dust suction member is inserted into the tool mounting hole, the dust suction holes are made to have negative pressure and foreign matter is sucked in, thereby removing fine chips. This makes it possible to easily remove foreign matter such as dirt and dust, greatly improving the fitting precision between the taper part of the tool holder and the taper hole of the spindle, and collecting foreign matter in one place without scattering it around the machine or into the air. It has the advantage of improving the environment and efficiently disposing of foreign substances.

In addition, since the inner surface of the tool mounting hole and the outer circumferential surface of the dust suction member are in contact with each other with a gap, the inner surface of the tool mounting hole is not worn and deformed by foreign matter when the dust suction member is inserted into the hole, and the dust suction There is no need to replace parts due to dirt or wear.

Furthermore, the rotating end of the dust suction member and the insertion end into the tool mounting hole are each positioned by a positioning stopper, and the distance between the outer circumferential surface of the dust suction member and the inner surface of the tool mounting hole is uniform at each location, thereby ensuring the removal of foreign matter. has advantages.

Also, since it is placed in opposition to a plurality of dust suction holes and tool mounting holes, foreign matter can be removed in a short time.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a machine tool in which a device according to the present invention is implemented, FIG. 2 is a cross-sectional view of the main parts thereof, and FIG. 3 is a view taken in the direction of the arrow (■) in FIG. 2...Shaft head, 3...Main shaft, 13...Tool mounting hole (
(Tapered hole), 20... Operating rod, 23... Piston side chamber, 26... Rack, 27... Swivel arm,
28... Dust suction member, 31... Dust suction hole, 34... Negative pressure generator, 50... Insertion position regulation stopper 51.
...Rotation position regulation stopper, A...Cleaning device.

Claims (1)

[Scope of utility model registration request] An operating iron that is movable and rotatable parallel to the axis of the main shaft is mounted on a shaft head that rotatably supports a main shaft having a tool mounting hole in which a tool is installed at the tip, and one end of this operating iron is mounted. A swivel arm is fixed, and a dust suction member having a cleaning surface with a plurality of dust suction holes opened on the outer peripheral surface is provided at the tip of the swivel arm, and the tip of the swivel arm is placed at a position facing the main shaft and at a position away from the main shaft. a rotating means for rotating the rotating arm about the operating shaft between the retracted position and a linear motion means for moving the rotary arm back and forth parallel to the main shaft axis at a position where the tip of the rotary arm is in contact with the main shaft and the retracted position; a stopper connected to the actuating rod, and provided on the shaft head to restrict the rotation end of the swing arm to position the dust suction member on the swing arm on the main shaft axis; and a stopper in the main shaft axis direction of the swing arm. A stopper is provided to position the dust suction member at an insertion position in the tool mounting hole by regulating a linear motion end of the dust suction member, and when the dust suction member is inserted into the tool mounting hole, the dust suction hole of the dust suction member is brought into negative pressure. A cleaning device for a tool mounting hole, characterized in that it is equipped with a negative pressure generating device.