JPH0318113Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an air supply device for an indexing tool rest in a multi-tasking lathe machine tool such as a turning center.

<Conventional technology> Conventionally, when supplying air to a swiveling and indexable tool post, providing a blowing air nozzle or the like on a fixed part near the tool post tends to cause interference with tools, etc. due to the rotation of the tool post. This makes it impossible to remove chips effectively.

Therefore, in order to effectively remove chips, an air supply device is used in which a fixed part and a rotating part are connectable with a coupling.

<Problems to be solved by the invention> However, the above-mentioned air supply device in which the fixed part and the rotating part are connectable with a coupling,
It is not perfect as there is a problem of chips entering the rotating parts.

The present invention was proposed in order to solve the problem in view of the above-mentioned circumstances, and the object thereof is to provide an air supply device for an indexing tool post that makes it possible to prevent chips from entering the rotating sliding portion.

<Means and effects for solving the problems> The present invention is an improvement of the air supply device for the conventionally known rotating and indexing tool post. a swing base that is pivotally supported by the swing base and indexed and positioned by movement in a direction parallel to the swing index axis; a plurality of tool holders provided on the swing base and containing rotary tools; and an upper part of the swing base. a ring member that is fitted and fixed on the outer periphery and has a plurality of air supply passages therein corresponding to each tool holder; a ring member that is provided so as to straddle the plurality of air supply passages of the ring member and each of the rotary tools; a plurality of air supply pipes that supply air from the air supply path to the rotary tool; a ring cover fixed on the base and provided to cover the outer periphery of the swing base; and a ring cover fixed on the ring cover and provided with the a manifold that seals the outer periphery of the rotating base and is provided with an intake port for air supplied from the outside; and a manifold that communicates with the manifold intake port and is provided in the manifold so as to be able to supply air, and a portion of which is connected to the ring member. an intermediate ring inserted into the interior so as to be relatively movable forward and backward; a sealing member provided on the intermediate ring or the ring member to maintain a sealed state of the supplied air; and the intermediate ring. The ring member is provided so as to straddle between the air supply ports of the ring member, and during the rotation indexing of the rotation base, the air-filled sealed state is maintained by the bias of a spring, and when the rotation base is positioned, and a coupling that allows air to be supplied to the rotary tool at any indexing position.

Air is supplied to the rotary tool holder at any indexing position by the plurality of air supply pipes. Even at the indexing position, the air is supplied without interruption, which enhances the labyrinth effect, and furthermore, the air is discharged outward to prevent chips from entering the rotating sliding portion during indexing.

<Example> Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

FIG. 3A is a front view of a turning center, which is a compound turning machine tool, to which the device of the present invention is installed, and FIG. 3B is a plan view of FIG. 3A.

In FIGS. 3A and 3B, a column 2 is placed on the left side of the bed 1, and a headstock 3 is attached to the front surface of the column 2. A main spindle 4 is rotatably supported on the main spindle 3. A chuck 5 is attached to the front surface of the main shaft 4, and the workpiece W is gripped by the chuck 5.

On the other hand, a guide 6 is provided on the right side of the bed 1, and a saddle 7 is movably placed on the guide 6, and is moved by a ball screw 8 in the Z-axis direction parallel to the spindle axis. A base 9 of a tool post is placed on the saddle 7 and is moved by a servo motor 11 along a guide surface 10 in the X-axis direction, which is perpendicular to the Z-axis direction.

A support stand 13 that supports an automatic tool changer 12 that automatically changes tools is attached to the side surface of the base (for example, base) 9 of the tool rest on the operator side, and a tool magazine 14 is further mounted on the base 9. Installed. A pot into which a plurality of tools are inserted is attached to the tool magazine 14. A swivel base 15 is rotatably supported on the oblique front surface of the base 9 so as to be indexable, and is indexed and positioned by movement in a direction parallel to the swivel index axis. A holder 16a and a rotary tool holder 16b are provided.

As shown in FIG. 3B, the swing base 15 on the base 9 is rotated and indexed as shown by the arrow around an axis Y inclined at 90 degrees in a horizontal plane with respect to the main shaft axis.
After the mounting position of the tool T is changed by 90 degrees, the tool T approaches the workpiece W held by the chuck 5 and performs a predetermined turning process.

That is, by rotating the swing base 15 of the base 9 by 180 degrees, the positions of the tool Ta and the tool Tb are exchanged, and the position of each tool is accurately determined.

(1) First, an overview of the present invention will be explained.

FIG. 1 is a front view showing a pair of fixed tool holders and rotating tool holders mounted on a rotating base of a tool rest, and further mounted with an air supply device of the present invention. Figure 2 A is the circled area A in Figure 1.
2 is an enlarged view and FIG. 2B is a sectional view taken along the line -- in FIG.

Especially in Figure 1 and Figure 2 B, the base 9
A ring cover (for example, a ring-shaped cover 17 is attached to the fixed side of the ring-shaped cover 17, and a rotating base 15 is rotated and indexed as shown by the arrow on the inner periphery of the ring-shaped cover 17. On the rotating base 15, a pair of fixed A tool holder 16a and a rotating tool holder 16b are fixedly installed, and as shown in FIG. 3, the fixed tool holder 16a is at the tool changing position, and the rotating tool holder 16b is at the turning position and the attached tool is not inserted. Turning is performed by Ta.In addition, the turning base 15
Although the details will be described later, when the rotation is indexed, the ring-shaped cover 17 rises slightly and after turning at a predetermined angle,
It is set to be indexed at the regular index position.

On the other hand, a joint 19 of the pipe 18 communicating with the air supply source is connected to a manifold member 30 fixed on the ring-shaped cover 17.

The manifold member 30 has an annular shape fitted onto the outer periphery of the swing base 15, and the outer periphery of the swing base 15 is sealed with a seal S. Furthermore,
An intermediate ring 31a having an L-shaped cross section is fixed to the upper surface of the manifold member 30.

An elliptical groove G is formed in the bottom of the intermediate ring 31a, and the intermediate ring 31a and the manifold member 30
A space is formed with the upper surface, and the joint 19 connected to the manifold member 30 is in this elliptical groove G.
The air supply holes are connected to each other.

A hole 31a' communicating with the elliptical groove G is bored in the upper surface of the intermediate ring 31a closer to the pivot base 15 side.

Further, a ring member 17f having a plurality of air supply passages is fitted inside the outer circumferential portion of the swing base 15 in correspondence with each tool holder 16a, 16b. The protrusions 17a and 17b protruding from the top are fixed to the upper surface of the swing base 15 with bolts 17e.

Furthermore, an air supply pipe (for example, a joint) 21 is attached to a hole bored in the protrusion 17a that protrudes inwardly of the ring member 17f, and the joint 2
The first pipe 22 is connected to a joint 23 attached to the rotating tool holder 16b.

Joints 26, 26 are also attached to the protruding part 17b located opposite to the protruding part 17a, one of which is attached to the rotating holder 16b, and the other is attached to the fixed tool holder 1.
It is piped to the 6a side.

That is, the protrusion 17b of the ring member 17f has
The joints 25 and 26 are attached, and the tip of the pipe 27 connected to the joint 25 is set near the fixing tool holder 16a, and the pipe 27 is connected to the joint 25.
Air is blown out from an air nozzle attached to the tip of the tool 7 to prevent chips generated during machining from entering the fixing tool holder 16a. The other end of the pipe 28 connected to the joint 26 is connected to a joint 29 attached to the rotating tool holder 16b.
connected to.

Two inward protrusions 17 of ring member 17f
A through stepped hole 32b is bored in the vicinity of a and 17b, and a bush 20 is installed in each stepped hole 32b.

Air flow passages are bored in these bushes 20, and these flow passages are formed by inward protrusions 17a and 17, respectively.
It is connected to communication holes 32, 32a communicating with joints 21, 25, 26 connected to b. (Second
Figures a and b).

Furthermore, a coupling ring 31b is slidably fitted below the bush 20 installed in the stepped through hole 32b, and a flange portion formed on the outer periphery of one end of the coupling ring 31b is attached to the stepped portion of the stepped through hole 32b. It is possible to engage with the part.

A stepped through hole 31c is bored inside the couple ring 31b, and a spring 33 inserted into the large diameter hole connects the tip of the couple to the intermediate ring 31c.
It is pressed against the top surface of 1a.

The small hole at the tip of the coupling ring is the middle ring 31a.
It matches the hole 31a' drilled in the upper part of the elliptical groove G, and its tip portion is sealed.

A ring groove 17 is provided at the bottom of the outer periphery of the ring member 17f.
A ring-shaped protrusion 31c formed on the upper outer edge of the intermediate ring 31a having an L-shaped cross section is fitted into the ring groove 17g, and both sides thereof are sealed with seal members 34 and 34'. There is.

Therefore, air supplied from the joint 19 passes through the elliptical groove G, passes through the bush 20 via the coupling ring 31b connected to the upper hole 31a', and is supplied to the joint 21 as shown by the arrow.

In the state shown in FIG. 1, the air supplied to the pipe 18 passes through the joints 19 and 21, passes through the pipe 22, and is only supplied to the rotating tool holder 16b via the joint 23. 15 is rotated 180 degrees so that the protrusion 17b becomes the protrusion 1.
7a, the air passes through joints 25, 26 and pipes 27, 28. This prevents chips from entering the blow-fixing tool holder 16a from the air nozzle attached to the tip of the pipe 27. Also, pipe 28 is joint 2
9 to the rotating tool holder 16b.

Therefore, air is constantly supplied to the rotating tool holder 16b even in the tool changing position or the turning position to prevent chips generated during turning from entering the rotating tool holder.

Fixed side ring member 17f and intermediate ring 31a
A coupling ring 31b is built in between the coupling ring 31b, and when the pivot base 15 rotates and indexes 180 degrees, the ring member 17f rises slightly together with the pivot member 15, and the coupling ring 31b is pushed down by the spring 33, but the coupling ring 31b Flange part has through-stepped hole 3
The distal end of the coupling ring 31b is engaged with the stepped portion of the intermediate ring 31b and prevented from descending, and the tip of the coupling ring 31b is separated from the upper surface of the intermediate ring 31a (FIG. 2B). While the ring member 17f is rotating 180 degrees, air is constantly supplied, and air leaks from the hole in the upper part of the elliptical groove of the intermediate ring 31a, causing a ring-shaped space P formed by the ring member 17f and the intermediate ring 31a. Since the fluid flows into and applies fluid pressure, it prevents fine chips and dirt from entering.

The structure of the air supply device constructed near the protrusion 17b is exactly the same as that constructed near the protrusion 17a shown in FIG. 2B, so a description thereof will be omitted.

Next, a state in which air is supplied to the rotating tool holder will be explained.

2C is a view of only the rotating tool holder shown in FIG. 1 in the direction of arrows, and FIG. In FIG. 2C and FIG.
6' is rotatably supported.

Front surface 15 on the spindle 16' side of the swing base 15
A flange 36 is attached to a and a ring member 37 fixed to the spindle forms a labyrinth. Furthermore, a male ring 39 attached to the tip of the spindle 16' is attached to the front surface 1 on the spindle 16' side.
A labyrinth is formed by fitting with a male ring 39 formed by a front ring 40 and an intermediate ring 38 fixed to 5a with bolts 41.

The joint 23 is connected to a hole drilled in the side wall of the front ring 40. Then joint 23
Air is supplied from and discharged into the gap between the male ring 39 on the spindle side and the inner surface of the front ring 40 to enhance the sealing effect and prevent chips and the like from entering. Note that another joint 29 connected to the rotating tool holder 16b has the same structure as the joint 23 described above, so a description thereof will be omitted.

The operation of the present invention will be explained.

Protrusions 17a and 17b are provided at opposing positions on the swing base 15, and a coupling ring 31b is built in near the protrusions.

In this state, when indexing the swing base 15, the swing base 15 is slightly raised. As the pivot base 15 floats, the engagement between the pivot base 15 and the pair of coupling rings on the base 9 side is disengaged. When the swing base 15 is rotated 180 degrees, the fixed tool holder 16a and the rotating tool holder 16b are exchanged. At the time of indexing, the rotating base 15 sinks, and the coupling rings engage with each other to ensure accurate indexing. When air is supplied from the pipe 18, the joint 21 is connected to the protrusion 17a through the joint 19,
It is discharged from the joint 23 through the pipe 22 to the discharge rotation tool holder 16b.

Furthermore, when indexing the fixing tool holder 16a to the cutting position, the protruding part 17b is replaced with the protruding part 17a by performing the same method as described above.
The other part 31b of the coupling is docked to one part. Thus, when air is supplied from the pipe 18, it passes through the joint 19, and the air is supplied to the pipes 27 and 27 connected to the joints 25 and 26, respectively.
28. From pipe 28 to joint 2
9 and is discharged to the rotating tool holder 16b. The air supplied to the pipe 27
The air is discharged from an air nozzle attached to the tip of the fixing tool holder 16a.

Therefore, the rotating tool holder 16b has a cutting position,
Air is discharged regardless of the replacement position.
Air is discharged from the fixing tool holder 16a only when it is in the cutting position.

<Effects> The present invention covers the rotating and indexing rotating base with a ring-shaped cover, and connects an air supply source to a part of the ring-shaped cover.
Couplings are provided at positions that match when the position is indexed, air is supplied from each coupling to the labyrinth part of the rotary tool holder, and a cutting/removal nozzle is provided for the fixed tool holder. Since air is also supplied into the shaped cover, firstly, the labyrinth effect of the rotating tool holder can be enhanced. Furthermore, since air is supplied and sealed between the ring cover and the ring member, chips on the swing base are prevented from entering the base, and therefore, chips are prevented from entering. As a result, the bearing portion is protected, so the life of the bearing is extended compared to conventional bearings, allowing for long-term use.

[Brief explanation of drawings]

FIG. 1 is a front view showing a pair of stationary tool holders and rotating tool holders mounted on a rotating base of a tool rest, and further mounted with an air supply device of the present invention. FIG. 2A is an enlarged view of the circled part in FIG. 1, and FIG. 2B is a sectional view taken along the line -- in FIG. 2A. 2C is a view of only the rotating tool holder shown in FIG. 1 in the direction of arrows, and FIG. FIG. 3A is a front view of a turning center, which is a compound turning machine tool, to which the device of the present invention is installed, and FIG. 3B is a plan view of FIG. 3A. 1...Bed, 2...Column, 3...Spindle,
4...Main shaft, 9...Base, 15...Swivel base, 16a...Fixed tool holder, 16b...Rotating tool holder, 17...Ring-shaped cover, 1
7f...Ring member, 18, 22, 27, 28...
...Pipe, 20...Butsuyu, 19,21,2
3, 25, 26, 29... joint, 30...
Manifold member, 31a... intermediate ring, 31
b...Cup ring, 33...Spring, 36
... flange, 37 ... ring member, 38 ... intermediate ring, 39 ... male ring, 40 ... front ring.

Claims (1)

[Scope of Claim for Utility Model Registration] A swing base that is rotatably and indexably supported on a base and indexed and positioned by movement in a direction parallel to the swing index axis; a plurality of tool holders including rotary tools; a ring member fitted and fixed on the upper outer periphery of the rotating base and having a plurality of air supply passages therein corresponding to each tool holder; a plurality of air supply pipes provided across an air supply path and each of the rotary tools and supplying air from the air supply path to the rotary tools; fixed on the base and covering the outer periphery of the rotating base; a ring cover provided on the ring cover; a manifold fixed on the ring cover to seal the outer periphery of the swing base and provided with an intake port for air supplied from the outside; communicating with the manifold intake port; an intermediate ring provided in the manifold so as to be able to supply air, and a portion of which is inserted into the ring member so as to be able to move forward and backward and rotate relative to each other; a sealing member for maintaining an air-tight state; and a sealing member provided spanning between the intermediate ring and the air supply port of the ring member, the sealing member being biased by a spring to seal the air while the rotating base is pivoting and indexing. and a coupling that maintains a sealed state and allows air to be supplied to the rotating tool at any indexing position when the rotating base is positioned. air supply device.