JPH07237083A - Supply method for air blow to a plurality of loads and device therefor - Google Patents

Abstract

PURPOSE:To facilitate air supply to a plurality of different loads by providing a switch valve which supplies pressure air for a main spindle air curtain through a second pressure controller to reduce the pressure air for the main spindle air curtain, and directly supplies pressure air for a main spindle tapered hole air blow without passing through the second pressure controller. CONSTITUTION:A switch valve V1 is always closed during the machining of a work, an pressure air sent from a pressure air source E is supplied to a gap between a main spindle 11 and a spindle head 1 through a common pressure controller 2 and a second pressure controller 3 to set up the reduction or pressure for a main spindle air curtain as main spindle air curtain air. The pressure air thereby forms an air curtain jetting constantly from a gap between the main spindle and the main spindle head 1. The switch valve V1 is closed during the changing of a tool, and the pressure air A is directly supplied to a main spindle tapered hole without passing through the second pressure controller 3 as air for main spindle tapered hole blow.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spindle air curtain and a spindle taper hole air blow in a spindle of a machine tool,
The present invention relates to a novel air blow supply method and device capable of switching the air supply to the two different loads via one air path.

[0002]

2. Description of the Related Art Conventionally, a spindle air curtain and a spindle taper hole air blow in a spindle of a machine tool share a single pressure air source, but the main spindle air curtain and the main spindle air curtain are connected via separate pressure regulators and open / close valves. Supply pipe is provided as a separate system as an air blow for the tapered shaft hole. Then, the air-blowing operation is performed by activating each on-off valve at different air-blowing timings.

[0003]

In the above-described spindle air curtain and spindle taper hole air blow, supply piping is provided as a spindle air curtain and a spindle taper hole air blow to different systems via different pressure regulators and open / close valves, respectively. Since the on-off valves are operated to perform the air blow operation at different air blow timings, a complete two-system piping system and its control system are required. Therefore, not only is the device system and control system complicated and expensive, but also the maintainability is deteriorated.

The present invention has been made in view of the problems of the conventional spindle air curtain and the air blow of the spindle taper hole, and it is possible to switch the air supply to the two different loads via one air path. It is an object of the present invention to provide a novel air blow supply method and device therefor.

[0005]

According to the present invention, in order to achieve the above object, the pressure air from one pressure air source through a common pressure regulator is used as a main shaft air curtain or a main shaft taper hole air blow to make the main shaft head end. An on-off valve that directly supplies pressure air from the pressure regulator is provided between the pressure regulator and the tip of the spindle head between the pressure regulator and the side of the spindle head, and a decompression setting for the spindle air curtain is installed in parallel with this on-off valve. A second pressure regulator is installed, and the pressure air of the spindle air curtain is decompressed by the second pressure regulator, and the pressure air of the spindle taper hole air blow is supplied directly from the on-off valve to multiple loads. This is the air blow supply method.

Further, the present invention is to achieve the above object.
Pressure air from one pressure air source through a common pressure regulator is supplied to the spindle head tip side portion as a spindle air curtain or a spindle taper hole air blow, and between the pressure regulator and the spindle head tip side portion, In addition to an on-off valve that directly transmits pressure air from the pressure regulator, a second pressure regulator for depressurizing the main spindle air curtain is installed in parallel with this on-off valve. This is an air blow supply device for a plurality of loads, characterized in that the pressure air of the main shaft taper hole air blow is supplied directly from the on-off valve in addition to the reduced pressure supply by the controller.

[0007]

According to the present invention, the pressure air for the spindle air curtain supplied from one pressure air source through the common pressure regulator and the second pressure regulator for setting the decompression for the spindle air curtain is supplied to the spindle. Is constantly ejected to the outside through the gap between the spindle and the head of the spindle, and acts as an air curtain for the spindle.

Further, a main shaft taper hole air blow piped from one pressure air source through a common pressure regulator and an on-off valve causes the on-off valve to open by an unclamp signal issued when a tool is changed. As a result, the pressurized air from the pressurized air source is also supplied as an air blow for the air curtain of the spindle that is constantly ejected from the gap between the spindle and the head of the spindle, but rather than this gap with flow resistance. Most of the flow rate to the spindle taper hole works, and it works as an air blow for the spindle taper hole.

As described above, in the air blow supply to a plurality of loads such as a main shaft air curtain and a main shaft taper hole air blow, which are piped from one pressure air source through a common pressure adjuster, the second pressure adjuster is used. The supplied low-pressure compressed air for the main shaft air curtain is constantly ejected to the outside through the gap between the main shaft and the head of the main shaft to perform the air curtain function of the main shaft. Here, by opening and closing the on-off valve when unclamping the tool, the pressure air is automatically switched to the spindle taper hole side with low flow resistance and blown out. The air blow supply is properly supplied.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments shown in the drawings will be described below. Figure 1
Reference numerals 4 to 4 show an air blow supply method for a plurality of loads and an apparatus 10 thereof according to the present invention. First, referring to FIGS. 1 and 2, on a spindle head 1 of a machine tool, pressure air A (for example, 5 kgf /
cm ² ) is supplied as a spindle air curtain K or a spindle taper hole air blow B to the spindle head front end side portion 1A. An electromagnetic on-off valve V1 for directly transmitting the pressure air A of the pressure adjuster 2 is interposed between the pressure adjuster 2 and the spindle head tip side portion 1A, and the main shaft air is provided in parallel with the on-off valve V1. A second pressure regulator 3 for setting the pressure reduction for the curtain K and this electromagnetic on-off valve V2 are provided. Then, the pressure air A ′ (for example, 0.
5 kgf / cm ² ) is decompressed and supplied by the second pressure regulator 3, and the compressed air A in the air blow B of the spindle taper hole is directly supplied from the on-off valve V1.

A spindle air curtain K and a spindle taper hole air blow B are formed in the spindle head 1 and the spindle 11 as shown in FIGS. That is, a plurality of bearings 12 are press-fitted into the main spindle head 1 near the tip end thereof, and the main shaft 11 is supported on the inner ring side. A narrow gap X is formed in a ring shape at the face-to-face contact between the inner circumference 1B of the tip of the spindle head and the outer circumference of the spindle 11. I am in touch. Then, as shown in FIG. 2, when the tool T is fitted in the spindle taper hole 11B and pressurized air is supplied,
The compressed air A ′ of the spindle air curtain K is ejected from the narrow gap X to the outside.

Further, with respect to the spindle taper hole 11B,
A ring space 1D and a through hole 11C, which communicate with each other regardless of the main spindle rotation position, are provided on the surface contact surface between the inner circumference 1B of the tip portion of the main spindle head and the outer circumference 11A of the main spindle 11. The taper hole 11B is opened at the back. Then, as shown in FIG. 3, the tool T is attached to the spindle taper hole 11B.
When the pressurized air is supplied in the state of being extracted from the through hole 11C, which has less flow resistance than the jetted air as the pressurized air A ′ of the spindle air curtain K from the narrow gap X to the outside.
11D flows into the taper hole 11B, and as a spindle taper hole air blow B, a gap Y with the taper portion 20A of the tool 20.
Is ejected as compressed air A from the outside.

As shown in FIGS. 1 and 4, the on-off valve V1 is turned on for a tool change time T from a control means (not shown) which receives a tool unclamp command e1 to unclamp the clamp K1 state. It is governed by the energizing power so that it opens. The opening / closing operation of the opening / closing valve V1 governs the function of supplying the compressed air A ′ of the spindle air curtain K and two different compressed air supply as the spindle tapered hole air blow A.

The method of supplying air blow to a plurality of loads and the device 10 thereof according to the present invention are as described above, and operate as follows. First, as shown in FIGS. 1, 2 and 4, the opening / closing valve V1 is closed from beginning to end during the processing of the workpiece W, and it is used for the spindle air curtain K from one pressure air source E through the common pressure regulator 2. The pressure air A'through the second pressure adjuster 3 for decompression setting is constantly ejected from the gap X between the spindle 11 and the spindle head 1A to the outside to perform the air curtain action of the spindle.

Subsequently, as shown in FIGS. 1, 3 and 4, a main shaft taper hole air blow B, which is piped from one pressure air source E through a common pressure regulator 2 and an on-off valve V1, is generated when a tool is replaced. Open / close valve V1 according to the unclamp command e1
To operate the opening. As a result, the pressure air A from the pressure air source E is supplied as the air blow A ′ for the air curtain of the spindle that is constantly ejected from the gap X between the spindle 11 and the spindle head 1A, but the flow resistance The flow amount into the spindle taper hole 11B becomes larger than this gap X, and it acts as an air blow B of the spindle taper hole 11B.

After this, when the tool changing operation is completed, the opening / closing valve V1 is closed by the unclamp command e1.
As a result, the pressure air A from the pressure air source E becomes pressure air A'through the second pressure adjuster 3, and again the main shaft 11 is constantly ejected from the gap X between the main shaft 11 and the main shaft head 1A to the outside.
It is supplied as an air blow A'for the air curtain of.

It is needless to say that the present invention is not limited to the above-mentioned respective embodiments, and that design changes can be further made within the scope of the invention.

[0018]

According to the present invention, since the supply method and the apparatus are as described above, the main spindle air curtain and the main spindle taper hole which are piped from one pressure air source through the common pressure regulator and the on-off valve. In air blow supply to multiple loads such as air blow, by opening and closing the open / close valve at the appropriate time, the pressure air is automatically switched to the necessary side with low flow resistance and blown out, and only one system of piping is used. Therefore, there is an effect that the air blow is appropriately supplied to a plurality of loads.

[Brief description of drawings]

FIG. 1 is a piping diagram showing an air blow supply device for a plurality of loads according to the present invention.

FIG. 2 is a partially cutaway sectional view of a main shaft portion showing an air blow supply device for a plurality of loads according to the present invention.

FIG. 3 is a partially cutaway sectional view of a main shaft portion showing an air blow supply device for a plurality of loads according to the present invention.

FIG. 4 is a time chart showing signal processing of the air blow supply device for the pallet of the present invention.

[Explanation of symbols]

 1 spindle head 1A spindle head tip side part 2 pressure regulator 3 second pressure regulator 10 air blow supply device 11 spindle 11B taper hole 20 tool 20A taper portion A pressure air A'depressurized pressure air B spindle taper hole air blow K spindle Air curtain V1, V2 Open / close valve E One pressure air source e1 Unclamp command X, Y Predetermined amount (gap)

Claims (2)

[Claims] 1. Pressure air from one pressure air source via a common pressure regulator is supplied to the spindle head tip side portion as a spindle air curtain or a spindle taper hole air blow, and the pressure regulator and the spindle head tip side. In addition to interposing an on-off valve that directly transmits the pressure air of the above pressure regulator between the parts, a second pressure regulator for depressurizing the spindle air curtain is installed in parallel with this on-off valve to reduce the pressure of the spindle air curtain. A method of supplying air blow to multiple loads, characterized in that air is supplied under reduced pressure by a second pressure regulator, and pressure air in the air blow of the spindle taper hole is supplied directly from the on-off valve. 2. The pressure air from one pressure air source through a common pressure regulator is supplied to the spindle head tip side portion as a spindle air curtain or a spindle taper hole air blow, and the pressure regulator and the spindle head tip side. In addition to interposing an on-off valve that directly transmits the pressure air of the above pressure regulator between the parts, a second pressure regulator for depressurizing the spindle air curtain is installed in parallel with this on-off valve to reduce the pressure of the spindle air curtain. An air blow supply device for a plurality of loads, characterized in that the air is decompressed and supplied by a second pressure regulator, and the pressure air of the air blow of the spindle taper hole is directly supplied from an on-off valve.