JPH06320385A - Tool holding tool - Google Patents

Abstract

PURPOSE:To simplify exchange of a filter and to perform the proper use of a filter according to the size of the oil hole of a used cutting tool by a method wherein a filter is incorporated in the body part of its accessory part of a tool holding tool. CONSTITUTION:A drill 2 has a straight shank, in which an oil hole is formed, in an axial direction and forms a solid type twist blade drill. The drill 2 is grasped by a collet 3 and the collet 3 is attached to an adapter body 4. A thrust block 5 extending through the oil hole is joined in a screwed-in manner with the interior of the adapter body 4. A position where the thrust block 5 is joined in a screwed-in manner therewith is moved by means of a hexagonal rod spanner to regulate the protrusion length of the drill 2. Further, a filter 6 for filtering cutting liquid is exchangeably incorporated in the rear end of the adapter body 4. For example, when a drill having a large oil hole is used, the filter 6 having a coarse mesh is used and excellent cutting is executed without lowering oil pressure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool holder for holding a cutting tool such as a drill or a boring tool provided with an oil hole in a main body thereof and preventing clogging of the oil hole.

[0002]

2. Description of the Related Art Since cutting fluid is circulated and used, it is necessary to provide a device for removing chips and chips mixed during cutting from the cutting fluid to prevent oil hole clogging. For this reason, a cutting fluid filtering device is usually incorporated as part of the machine tool side device such as a filter attached to a cutting fluid supply pump.

[0003]

By the way, when using a cutting tool having a small oil hole, it is necessary to use a filter having a particularly fine mesh in order to prevent the oil hole from being clogged. On the other hand, cutting tools with large oil holes are less likely to cause oil hole clogging, so it is not necessary to make the filter mesh fine, but conversely, if a fine filter is used, the supply hydraulic pressure and oil amount will decrease. Become.

Therefore, depending on the size of the oil hole of the cutting tool to be used, it is necessary to properly use a fine mesh and a coarse mesh, but as described above, it is incorporated as a part of the machine tool side device. Replacing the filter of the existing cutting fluid filtering device each time is a very troublesome work.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention focuses on a tool holder interposed between a cutting tool and a machine tool, inside the main body or inside an accessory. It has a built-in filter for cutting fluid filtration.

[0006]

When the tool holder according to the present invention is used, the filter of the cutting fluid filtering device on the machine tool side has a coarse mesh attached. This filter removes only relatively large chips. Further, since the mesh is coarse, the discharge pressure does not drop in this portion.

When a cutting tool having a large oil hole is used in the above-mentioned state, the filter inside the tool holder is provided with a relatively coarse mesh so that the hydraulic pressure and the oil amount are not lowered. Moreover, since the holes are large, it is possible to perform processing without worrying about oil hole clogging.

On the other hand, when a cutting tool having a small oil hole is used in the same mechanical condition, the filter inside the tool holder is replaced with a fine mesh. As a result, even if it is inevitable that depressurization in the filter portion will occur in the same way as when a filter with a fine mesh is attached to the pump, the removal of fine chips is prioritized to prevent oil hole clogging. Moreover, the filter replacement work on the tool holder side is easier than the filter replacement on the machine tool side.

[0009]

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

1 to 5 show five examples out of several embodiments according to the present invention, and the same parts are designated by the same reference numerals. Of these, FIG. 1 is a view showing an example in which a filter 6 is incorporated in an adapter 1 for a drill, which is an accessory part of a tool holder, and is a front view including a partial cross section.

In FIG. 1, a drill 2 is a solid-type twisted blade drill which is a straight shank having an oil hole in the axial direction. The drill 2 is gripped by a collet 3, and the collet 3 is attached to the adapter body 4. An abutting piece 5 having an oil hole penetrated therein is screwed into the adapter body 4, and the projecting length of the drill 2 can be adjusted by moving the screwing position of the abutting piece 5 with a hexagonal wrench. It has become. Further, a filter 6 according to the present invention is fitted on the rear end of the adapter body 4.

Now, the filter 6 will be described. Although there are some examples of the filter 6, three examples are shown in FIGS. 6 to 8. Of these, Figure 6
(B) is a front sectional view of the filter 6, and (a) is a top view. The filtering piece 7 has concentric folds in the top view and wavy folds in the front sectional view (b) to increase the filtration surface area. Filter piece 7
The material is made of filter paper or filter cloth.

FIG. 7 shows another example of the filter 6, in which (a)
Is a top view, (b) is a front sectional view, and (c) is a bottom view. Five disc-shaped filter pieces 7 are assembled in the horizontal direction in the front sectional view (b), and the mesh thereof becomes finer from the top to the bottom in the figure. Therefore,
This filter is used so that the upper surface is the cutting fluid inlet side and the lower surface is the outlet side.

Further, FIG. 8 shows another example, FIG. 8A is a top view, FIG. 8B is a front sectional view, and FIG. 8C is a bottom view. The filter piece 7 has radial pleats as shown in the top view (a) and the bottom view (c).
As shown in FIG. 3, the disk-shaped one is formed, and the through hole is formed in the central portion. The purpose of forming the folds is shown in FIG.
As described above, the purpose is to increase the filtration surface area. Also in this filter, the upper surface is the cutting fluid inlet side and the lower surface is the outlet side. Note that this filter is a filter for rotary tools such as drills, etc.Since chips, etc. tend to collect on the outer peripheral part due to centrifugal force due to rotation, the function as a filter is impaired even if there is a through hole in the central part. There is no such thing.

The filter 6 as described above is incorporated in the rear end of the adapter body 4 shown in FIG. This straight shank adapter 1 is attached to the tip of a tool holder with an oil supply mechanism by a side lock, and this tool holder is attached to a machine tool. The cutting fluid is sent from the machine tool in the order of the tool holder and the adapter, and is sprayed from the tip to the vicinity of the cutting edge through the oil hole of the drill 2. Chips and chips are removed by the filter 6 when the cutting fluid passes through the adapter 1, but when using a drill with a large oil hole, use a filter with a coarse mesh, which is good without causing a drop in hydraulic pressure. Can be cut into. Also,
When using a drill with a small oil hole, use a fine mesh filter to remove chips and chips sufficiently and prevent the drill 2 from being clogged with oil holes. At this time,
The hydraulic pressure causes a pressure reduction equivalent to using a fine mesh filter on the pump side of the machine tool, but the trouble of exchanging it on the pump side can be omitted. The filter on the pump side may always have a coarse mesh filter attached.

Next, FIGS. 2 to 5 will be described. Figure 2
4 to 7 are front views including a partial cross section. Also,
FIG. 5 is a perspective view including a partial cross section.

FIG. 2 shows the filter 6 installed in the rear end of the butting piece 5. FIG. 3 shows the filter 6 incorporated in the depth of the screw hole of the pull stud 9 screwed to the rear end of the tool holder 8 which is a tool holder used in the machining center. Similarly, in FIG. 4, the adapter 1 for the drill 2 is attached to the tool holder 8 by the side lock, but the filter 6 is incorporated in the depth of the attachment hole. Further, FIG. 5 shows the case where the filter 6 is incorporated in the rear end portion of the sleeve 11 for holding the boring bar tool 10 having the oil hole in the shaft center, and the sleeve 11 is attached to the turret of the lathe or the like. To be

In any of the cases shown in FIGS. 2 to 5, the performance according to the present invention is similar to the embodiment described in FIG.

[0019]

As described above, by incorporating the filter into the main body of the tool holder or its accessory, the filter can be easily replaced, and the size of the oil hole of the cutting tool to be used can be increased. Depending on the situation, it can be used properly. At this time, a filter such as a pump on the machine tool side may always have a coarse mesh attached.

[Brief description of drawings]

FIG. 1 is a front view including a partial cross section showing an embodiment of the present invention, in which a filter is incorporated into an adapter for a drill.

FIG. 2 is a front view including a partial cross-section showing another embodiment of the present invention, in which a filter is incorporated in an abutting piece incorporated in an adapter.

FIG. 3 is a front view including a partial cross-section showing another embodiment of the present invention, in which a filter is incorporated at the rear end of a tool holder for a drill.

FIG. 4 is a front view including a partial cross section showing another embodiment of the present invention, in which a filter is incorporated into an adapter mounting hole of a tool holder for drilling.

FIG. 5 is a perspective view including a partial cross-section showing another embodiment of the present invention, in which a filter is incorporated at the rear end of the boring tool sleeve.

6A and 6B are views showing an embodiment of a filter used in the present invention, in which FIG. 6A is a top view and FIG. 6B is a front sectional view.

7A and 7B are views showing another embodiment of the filter used in the present invention, FIG. 7A is a top view, FIG. 7B is a front sectional view, and FIG. 7C is a bottom view.

FIG. 8 is a view showing another embodiment of the filter used in the present invention, (a) is a top view, (b) is a front sectional view, and (c) is a bottom view.

[Explanation of symbols]

 1 adapter 2 drill 3 collet 4 adapter body 5 abutting piece 6 filter 7 filtering piece 8 tool holder 9 pull stud 10 boring tool 11 sleeve

Claims (1)

[Claims] 1. A tool for holding a cutting tool having an oil hole for supplying cutting fluid in a tool body and mounting the cutting tool on a machine tool capable of supplying the cutting fluid so that the cutting tool can be used. In the tool holder, a cutting fluid filtering filter is incorporated inside the main body of the tool holder or an accessory thereof, and the cutting fluid supplied from the machine tool to the tool holder passes through the filter and then the cutting tool. A tool holder having a structure adapted to be supplied to a tool holder.