JPH07164277A - Cooling air supplying device for multiple spindle drilling machine - Google Patents

Abstract

PURPOSE:To directly and efficiently cool the edge part of each cutting tool on a plurality of spindles of a multiple spindle drilling machine by providing the injection hole of each cutting tool in such a manner as to communicate with the fluid supplying pressure chamber of an air supplying head member. CONSTITUTION:At the drilling of a work, a driving motor is driven, and a plurality of spindles 9 are simultaneously rotated through a gear mechanism connected to the driving motor. A cylinder device is also driven to advance the spindles 9 along a feed slide, and the drilling to the work is carried out by a drill 12 on each spindle 9. During this, the cooled pressurized air from a factory air source is guided from a supplying pipe 22 into an injection hole 13 through a fluid supplying pressure chamber 20, an inlet port Pa and a tank hole 10b, and the pressurized air from each injection hole 13 is blown out from the front flank of the drill 12 to directly cool the cutting edge of the drill 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling air supply device for a multi-spindle drilling machine for cooling a drill and removing chips when drilling a work with a plurality of drills such as a multi-spindle drilling machine.

[0002]

2. Description of the Related Art Conventionally, a hole machining chip collecting device of this type is constructed as shown in FIG.
No.).

As shown in FIG. 5, for example, a lower portion 30a of a nose piece 30 in a drilling machine is provided with a guide bush 31, and a slide bush 32 is downwardly moved by the elastic force of a coil spring 33 in the guide bush 31. It is slidably fitted so that it is biased toward and does not fall off. A power tool body 35 having a cutting tool 34 by a drill, for example, is rotatably fitted in the nose piece 30, and the cutting tool 34 has an air injection hole (not shown) in the axial direction. ) Is provided, and the cutting tool 34 penetrates the slide bush 32 and projects downward. Further, in the axial direction of the cutting tool 34, a flute 36 is formed so as to discharge the cooling air of the cutting tool 34 and collect chips, and an air supply rotary union 35 (inducer) is provided in the upper part. The air supply port 37 connected to the factory air source is connected to the flute 36.

On the other hand, the lower portion 30a of the nosepiece 30
The chip collecting chamber 38 is formed so as to temporarily collect and collect the chips from the flute 36, and the chip collecting chamber 38 is connected to the vacuum dust collector 40 through the collecting pipe 39.

Therefore, in the above-described hole-machining chip collecting device, when the work W is cut, the work W is cut by the cutting tool 34 to form a predetermined hole and the guide bush 31 surrounding the cutting tool 34. Is pressed against the work W against the elasticity of the coil spring 33, the pressurized air from the air supply port 37 connected to the factory air source cools the cutting tool 34 through the air injection hole of the cutting tool 34. Further, the chips are temporarily collected in the chip collecting chamber 38 without scattering in all directions through the flutes 36,
Dust is collected from the chip collection chamber 38 through a collection pipe 39 to a vacuum dust collector 40.

The hole-machining chip collecting device described above is usually used for a relatively large-diameter cutting tool called a gun cutting tool.

[0007]

However, since the hole machining chip recovery device described above is provided with the air injection holes of the cutting tool 34 and the flutes 36, the outer diameter of the cutting tool 34 has a certain size. If it is not, even if it is theoretically possible, it is difficult to use it as it is.

On the other hand, in a multi-axis drilling machine in which a large number of spindles are arranged side by side, the gear mechanism for driving them becomes an obstacle, and this causes the inset at the tail end of each spindle. It became difficult to provide a reducer (a rotary joint for supplying fluid to the rotary shaft), and maintenance and inspection such as replacement of the seal material incorporated in the inducer was troublesome.

Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, to directly cool the blade portion of each cutting tool of the spindle without scattering chips in all directions.
An object of the present invention is to provide an air supply device for a multi-axis head that positively sucks and collects chips to improve the working environment and improve the operating efficiency during operation.

[0010]

To achieve the above object, a plurality of spindles are rotatably arranged side by side on a multi-axis head of a multi-axis drilling machine, and a hole is formed at the tip of each spindle through a socket member. In a multi-spindle drilling machine holding the cutting tool, the multi-spindle head is provided with an air supply head member having a fluid supply pressure chamber to which pressurized cooling air is supplied,
A cold air intake hole communicating with the socket hole of the socket member is provided in the spindle portion facing the fluid supply pressure chamber, and the cold air intake hole is communicated with the tongue hole provided in the socket member and held by the socket member. It is configured so as to communicate with a cold air injection hole provided so as to penetrate in the longitudinal direction of the cutting tool.

[0011]

According to the present invention, when a workpiece is drilled, a plurality of spindles are simultaneously rotated to cut the workpiece, and at the same time, pressurized air from the supply port connected to the factory air source supplies the fluid to the air supply head member. It is supplied to the pressure chamber and further supplied to the front flank of the cutting edge of each cutting tool through the inlet of the spindle, the tongue hole and the injection hole in the cutting tool, and the cutting edge of the cutting tool is directly cooled.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention, which is applied to a multi-axis drilling machine, will be described below.

In FIG. 3, reference numeral 1 indicates a bed of a multi-axis drilling machine, a feed unit 2 is provided on the bed 1, and the bed 1 faces the feed unit 2. Jig mount 3 at position
Is installed. A pair of feed slides 2a are arranged in parallel on the upper part of the feed unit 2, and the feed slides 2a are slidably provided with ikeles 4 by a cylinder device (not shown). Further, a multi-axis head 5 is provided on the front surface of the squid 4, while a drive motor 6 is attached to the back surface of the squid 4.

As is apparent from FIG. 1, two spindles 9, 9 are rotatably fitted in the multi-axis head 5 via a plurality of bearings 7 and a plurality of oil seals 8. These spindles 9, 9 are arranged in parallel at a predetermined interval, and the right end portion 9a of these spindles 9 is
Is connected to the drive motor 6 via a gear mechanism (not shown) built in the multi-axis head 5. In addition, near the tip of each spindle 9, the socket hole 9
b is bored, and the socket 10 is fitted in the socket hole 9b. This socket 10 has a half-moon key 1
It is prevented from rotating with respect to the spindle 9 via 1.
The socket 10 has a tapered hole 10a and a tongue hole pair 1.
0b, and the drill 12 is attached to the tapered hole 10a. An injection hole 13 is bored in the drill 12 over the entire length in the axial direction, and the tip end of the injection hole 13 is opened in the front flank of the drill 12, and the inlet end of the injection hole 13 is formed. Communicates with the tongue hole 10b.

On the other hand, as shown in FIGS. 1 and 2, an air supply head member 14 is fixed to the front surface 5a of the multiaxial head 5. The air supply head member 14 is constructed by stacking a pair of front and rear flat plates 15 and 16, which are fixed by a mounting bolt 17 and a knock pin 18, and the flat plate 15 of the air supply head member 14 is fixed.
An exhaust manifold 19 is formed in the exhaust manifold 19, and the manifold 19 communicates with the atmosphere. A fluid supply pressure chamber 20 is formed on the flat plate 16 side of the air supply head member 14, and the fluid supply pressure chamber 20 is supplied through a supply pipe 22 connected to an air supply port 21 to a factory air source ( (Not shown). Further, an inlet 9c for pressurized cold air is formed in a portion where the spindle 9 is located in the fluid supply pressure chamber 20. The intake port 9c communicates with the tongue hole 10b of the socket 10. Therefore, the cooled pressurized air from the factory air source is guided from the supply pipe 22 to the injection hole 13 through the fluid supply pressure chamber 20, the intake port 9c, and the tongue hole 10b, and is supplied to the front flank of the drill 12. It On the other hand, a labyrinth peripheral groove 23 is formed on the outer periphery of the spindle 9 in a region where the spindle 9 penetrates the air supply head member 14, and the air supply head member 14 facing each labyrinth peripheral groove 23 is formed. Labyrinth groove 2 on the side
4 are formed respectively.

On the other hand, as shown in FIG. 3, a jig body 25 is erected on the jig mounting base 3, and a guide bush 25a for guiding the drill 12 is provided on the jig body 25. It is provided. A work supporting member 26 for mounting the work W is provided on the side surface of the jig body 25, and as shown in FIG.
A chip collecting chamber 26a is formed in 6 so as to temporarily collect chips. Further, a vacuum dust collector 29 is connected to the chip collecting chamber 26a through a communication hole 28, and the vacuum dust collector 29 can collect dust in the chip collecting chamber 26a together with the used pressurized air through the communication hole 28. It is like this. Further, the jig body 25 is provided with a plurality of clamp devices 27 so that the work W can be attached to and detached from the jig body 25. The clamp devices 27 are composed of a clamp cylinder device 27a and a grip claw 27b.

Next, the operation of the cooling air supply apparatus according to the present invention described above will be described. The work W to be drilled is to be clamped in advance at a predetermined position of the jig body 25 by using the clamp device 27.

When the workpiece W is punched, the drive motor 6 is driven, and a plurality of spindles 9 are simultaneously rotated through a gear mechanism connected to the drive motor 6 to drive the cylinder device and the feed slide 2a. The spindle 9 is advanced along with, and the work 12 is drilled by the drill 12 on each spindle 9. During this time, the cooled pressurized air from the factory air source is guided from the supply pipe 22 into the injection hole 13 through the fluid supply pressure chamber 20, the intake port 9a, and the tongue hole 10b, and from each injection hole 13 Pressurized air is jetted from the front flank of the drill 12 to directly cool the cutting edge. Further, the vacuum dust collector 29 is provided in the chip collecting chamber 26.
The chips of a are collected together with the used pressurized air through the communication hole 28 so that the chips do not scatter in all directions.
The vacuum dust collector 29 collects dust twice.

[0019]

As described above, according to the present invention, the air supply head member having the fluid supply pressurizing chamber inside is attached to the front surface of the multi-axis head, and the injection holes of the respective cutting tools are formed in the air supply head. Since it is provided so as to communicate with the fluid supply pressure chamber of the member, the blade portion of each cutting tool on a plurality of spindles such as a multi-axis drilling machine can be directly and effectively cooled.
Also, since the labyrinth circumferential groove is formed in the part where the spindle penetrates the air supply head member, it is possible to deal with each spindle even if they are close to each other, and it is possible to perform high speed rotation without contact. Have.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a main part of a cooling air supply device according to the present invention.

FIG. 2 is a front view of the device.

FIG. 3 is a side view showing a horizontal multi-axis drilling machine to which the present invention is applied.

FIG. 4 is a front view of a work supporting member on which a work incorporated in the present invention is mounted.

FIG. 5 is a vertical cross-sectional view showing a conventional hole-machining chip recovery device.

[Explanation of symbols]

 5 Multi-Axis Head 13 Injection Hole 14 Air Supply Head Member 20 Fluid Supply Pressure Chamber

Claims (3)

[Claims] 1. A multi-spindle drilling machine in which a plurality of spindles are rotatably arranged side by side on a multi-spindle head of a multi-spindle drilling machine, and a cutting tool is held at the tip of each spindle through a socket member so that pressurized cooling air An air supply head member having a fluid supply pressure chamber to be supplied is provided in the multi-axial head, and a cold air intake hole communicating with a socket hole of the socket member is provided in the spindle portion facing the fluid supply pressure chamber. At the same time, it is configured to communicate with a tongue hole provided in the socket member, and to communicate with a cold air injection hole provided penetrating in the longitudinal direction of the cutting tool held by the socket member. Cooling air supply device for multi-axis drilling machine. 2. A multi-spindle drilling machine according to claim 1, wherein the outer peripheral surface of the spindle at a portion where each spindle penetrates the air supply head member and the through hole portion on the air supply head member side are constituted by labyrinth means. Cooling air supply device. 3. The work supporting member is constituted as a chip collecting chamber in an encircling shape, and a portion excluding the work supporting reference surface is formed in an air inflow portion, and the chip collecting chamber is communicated with a vacuum dust collector under the work supporting member. The cooling air supply device for a multi-axis drilling machine according to claim 1, characterized in that.