JPH08174321A - Chip cutting bush - Google Patents

Abstract

PURPOSE: To surely cut chips and to continuously and safely discharge these to the outside by providing cutter sections engaged with drills between a drill guiding section and a jig fitting section. CONSTITUTION: A jig is placed on a boring-machined workpiece, the jig fitting section 1 of a chip cutting bush B is fitted into the jig, a drill edge is fitted into the drill hole section 21 of a drill guiding section 2 and fitted into the fitting hole section 11 of the jig fitting section 1. Then, when the drill edge is rotated, since a gap section in a longitudinal direction is formed almost twice as large as the drill outer diameter of the drill edge and a cutter section 3 is disposed in a plan view almost on the same side relative to a center shaft, an opening can be widely formed. Thus, chips are finely cut between the drill edge and a cutter 32 without any remaining and safely discharged to the outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chip cutting bush which is fitted in a jig for drilling and cuts chips generated during drilling.

[0002]

2. Description of the Related Art Conventionally, in order to drill a hole in a drilled product, a jig for guiding the drill is placed on the drilled product, and a jig as shown in FIG. 8 is mounted on the jig. The non-cylindrical bush B1 or the cylindrical bush B2 with a collar as shown in FIG. 7 is fitted, and the drill is guided by these bushes to make a hole in the punched product. As shown in (3), the cutting chips S2 generated during drilling are wound around the drill blade D2 and continuously scattered longer than the upper gap between the bush B2 and the drill blade D2, which is not preferable for safety work.

Therefore, in the one disclosed in Japanese Patent Application Laid-Open No. 50-54979, as shown in FIG.
The bush B3 is fitted on the jig plate J3 which is provided a little further away, and the bush B3 has an end surface on the pull-out side of the drill blade D3.
Template K3 having a hole with the same shape as the cross section of the drill blade D3
Has been proposed so that the tangled chips S3 can be removed when the drill blade D3 returns.

In Japanese Utility Model Application Laid-Open No. 58-36015, as shown in FIG. 10, a bush B4 is fitted on a jig plate J4 which is provided at a distance from the punched product A4. It is also proposed that a tip breaker portion T4 having a clearance angle be attached to the end surface of the bush B4 on the escape side of the drill blade D4 so as to cut the entangled chips S4 when the drill blade D4 returns.

Further, in the one disclosed in Japanese Utility Model Laid-Open No. 61-61113, as shown in FIGS. 11 to 12, a bush B5 is fitted on a jig plate provided in contact with a punched product, It is also proposed that at least one notch groove M5 is provided on the end surface of the bush B5 on the side where the drill blade comes off so that chips generated during processing by the drill blade can be cut.

[0006]

Conventionally, during drilling with a drill, a cylindrical bush is fitted into a jig to guide the drill. However, the chips generated during the drilling process. Wraps around the drill blade and is continuously scattered for longer than the upper clearance between the drill blade and bush, which is dangerous.

For this reason, as described above, various methods for preventing the scattering of the cutting chips have been proposed. Among them, a jig for fitting the bush is provided at a distance from the punched product, The former two, in which members for removing or cutting off chips are provided on the workpiece side of the bush, process many members by mounting them on a jig or bush, which complicates the structure and reduces work efficiency. , The latter, in which a jig for fitting a bush is provided in contact with the punched workpiece and a notch groove for cutting chips is provided on the end face, the chips are accumulated between the bush and the workpiece, and are clogged. There are problems that the cutting chips damage the work piece, and that it is necessary to stop the work and discharge the accumulated cutting chips, which lowers the work efficiency.

The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and a jig fitting portion whose outer shape can be fitted to a jig for drilling, and the jig fitting portion. The blade portion for cutting the cutting chips is composed of a drill guide portion that is opposed to the mounting portion with a gap, and a blade portion that is arranged between the drill guide portion and the jig fitting portion. Since it is on the opposite side of the drill work piece to the jig, it prevents damage to the drill work piece due to chips generated during drilling and prevents clogging between the bush and the drill work piece, and also reliably cuts cutting chips. Then, it is continuously and safely discharged to the outside to improve the work safety and work efficiency of drilling.

[0009]

In view of the above, according to the present invention, firstly, a jig is fitted with an outer shape to a jig for drilling and provided with a fitting hole portion into which a drill can be fitted. And a jig guide part having a space between the jig guide part and a drill guide part provided with a drill hole, and a row provided between the drill guide part and the jig fit part. By using a bush for cutting chips that is composed of blades that can be fitted together. Secondly, the cutting portion is formed by cutting out one side surface of a cylindrical wall and forming a blade at least at one end portion thereof. Thirdly, the chip cutting bush according to claim 1 or 2, wherein the blade portion is formed so that its length in the vertical direction is approximately equal to or approximately three times as long as the outer diameter of the drill. Further, fourthly, the blade cutting portion according to any one of claims 1 to 3, wherein the blade portions are arranged on substantially the same side of the central axis in a plan view, thereby achieving the above object. It is a thing.

[0010]

In the present invention having the above structure, the outer shape is fitted to the jig for drilling, and the jig fitting portion having the fitting hole formed so that the drill can be fitted therein, and the jig fitting portion. A blade which is provided opposite to the joint portion with a gap and has a drill hole portion, and a blade which is arranged in a row between the drill guide portion and the jig fitting portion so as to be engageable with the drill. By using a chip-cutting bush for cutting chips, a cutting edge for cutting chips is provided on the side opposite to the jig punched workpiece, so the chips generated by drilling damage the drilled workpiece. In addition, the cutting chips can be easily and safely discharged to the outside by cutting the cutting chips with the blade portion without causing the cutting chips to be accumulated between the bush and the workpiece and clogged. Further, the blade portion, by notching one side surface of the cylindrical wall, by forming a blade at least one end portion, to simplify the structure of the blade portion, especially the blade portion It is possible to easily and surely cut the upper end portion and to safely cut the cutting chips.

Further, the blade portion is formed such that the length in the longitudinal direction is approximately equal to or approximately three times as long as the outer diameter of the drill, so that the cutting of chips is surely performed, As described above, chips can be safely discharged to the outside with a length approximately twice the outer diameter of the drill. In addition, this length is,
That is, it is selected appropriately according to the rotation of the drill and the material to be cut, and if the outer diameter of the drill is approximately the same length, chips can be discharged, and even if the above various conditions change, it can be tripled. If so, the cutting chips can be easily discharged, and the structure can be easily handled for easy handling.

Further, since the blade portion is arranged on the substantially same side of the central axis in plan view, it is possible to sufficiently cut the cutting chips, and the cut cutting chips can be cut. It can be exhausted to the outside.

Further, it can be easily used with compatibility with the bush-shaped ones currently used.

[0014]

EXAMPLES In order to further clarify the gist of the bush for cutting chips of the present invention, a first example will be described below with reference to FIGS. 1 to 6. B is a steel chip cutting bush according to the present invention, and 1 is a jig fitting portion, the outer shape of which is formed into a cylindrical shape so that it can be fitted into a jig J for drilling, and a drill blade D is fitted therein. Cylinder-shaped fitting hole 11 formed as possible
It has. Reference numeral 2 is a drill guide portion, which is opposed to the jig fitting portion 1 with a gap portion h and has a drill hole portion 21.
And is formed in an annular shape, and as shown in FIG. 4, the role of preventing damage to the blade portion 3 due to contact between the blade portion 3 and the drill blade D described later due to eccentricity of the drill blade D Is equipped with. Further, 3 is a semi-cylindrical blade part, which is arranged between the drill guide part 2 and the jig fitting part 1 so as to be engageable with the drill blade D, and has a cylindrical wall. The blade 31 is provided with a blade 32 formed in a notch on one side surface of the blade 31, and the vertical spacing h of the blade 32 of the blade portion 3 is approximately equal to the drill outer diameter d of the drill blade D. Furthermore, as shown in FIG. 3, the blade portion 3 has a central axis X in plan view.
It is arranged on substantially the same side as -X.

Next, the operation of this embodiment will be described.
First, the jig J is placed on the punched workpiece T, the jig fitting portion 1 of the chip B for cutting chips is fitted on the jig J, and the drill blade D is drilled by the drill guide portion 2. When the drill blade D is rotated after being fitted into the hole portion 21 and fitted into the fitting hole portion 11 of the jig fitting portion 1, the vertical gap h of the blade portion 3 becomes equal to that of the drill blade D. It is formed to have almost twice the outer diameter d of the drill, and the blade portion 3 is, in plan view, as shown in FIG.
Since it is arranged on the substantially same side of the central axis X-X, the opening can be wide, and as shown in FIG.
Can be finely cut without leaving between the drill blade D and the blade 32 and safely discharged to the outside. The spacing h
Is to be selected appropriately according to the drilling conditions, that is, the rotation of the drill, the material to be processed and the like, and the length is approximately equal to or approximately three times the outer diameter d of the drill.

Further, by providing the drill guide portion 2, the drill blade D to be used does not run out, for example, if the drill guide portion 2 is not provided, as shown in FIG.
As shown in, the tip of the drill blade D collides with the blade 32,
It will be cut off, but this can be prevented.

In the above embodiment, the blade is integrally formed by cutting out the side surface of the cylindrical wall and providing the blade at one end, but if the end has a sharp edge, the blade is particularly formed. Further, although the blade portion has a semi-cylindrical shape, it may be formed by fixing a plurality of pillars of another member formed in a blade shape. Each configuration of the chip cutting bush according to the present invention The shape, size, material, method of use, etc. of the elements may be arbitrarily determined within the range in which the above-mentioned objects, actions, and effects of the invention described below are achieved, and all of these changes are the gist of the present invention. It goes without saying that this is not a change.

[0018]

As described in detail above, the present invention provides
Form the outer shape so that it can be fitted into a jig for drilling, and
A jig fitting portion having a fitting hole portion formed so that a drill can be fitted therein, and a drill guide portion having a drill hole portion, which is opposed to the jig fitting portion with a comparative distance. A blade for cutting chips generated by drilling by using a chip cutting bush composed of a blade portion arranged so as to be engageable with a drill arranged between the drill guide portion and the jig fitting portion. Part can be provided in a sufficiently opened form, and as described above, cutting is performed at the terminal end of the interval part having a relatively long distance to the jig, so that chips are drilled Can be continuously cut and safely ejected to the outside without damaging the blades and clogging by accumulating between the bush and the drill workpiece, thus ensuring the safety and efficiency of drilling. Has the effect of improving.

Further, since the blade portion is formed by cutting out the side surface of the cylindrical wall and forming the blade on at least one end portion, the blade structure is simple, and the strength is high because of the integral structure. And while improving the manufacturing efficiency of the bush,
Since the chips can be surely cut, there is an effect of further improving the work safety and work efficiency.

Further, the blade portion is formed so that the length in the longitudinal direction is approximately equal to or approximately three times as long as the outer diameter of the drill, so that the cutting chips can be easily cut and externally cut. Can be safely discharged, further improving the work safety and work efficiency,
Furthermore, there is an effect that the structure is integrated.

Further, since the blade portion is arranged on the substantially same side of the central axis in plan view, it is possible to sufficiently cut the cutting chips, and the cutting chips are not left outside. Can be discharged to the work, and the work safety and work efficiency can be further improved. As described above, the present invention has a unique effect,
It is a truly excellent invention.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a front view showing an embodiment of the present invention.

FIG. 3 is a plan view showing an embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a main part of an operating state of the present invention.

FIG. 5 is an explanatory diagram showing a main part of an operating state of the present invention.

FIG. 6 is an explanatory view showing an embodiment of the relationship between the chip cutting bush and the drill of the present invention.

FIG. 7 is an explanatory diagram showing an example of a relationship between a conventional chip cutting bush and a drill.

FIG. 8 is a perspective view showing a conventional example.

FIG. 9 is a cross-sectional view showing a conventional example.

FIG. 10 is a cross-sectional view showing a conventional example.

FIG. 11 is a side view showing a conventional example.

FIG. 12 is a plan view showing a conventional example.

[Explanation of symbols]

 1 Jig Fitting Part 11 Fitting Hole Part 2 Drill Guide Part 21 Drill Hole Part 3 Blade Part 31 Wall Blade 32 Blade B Chip Cutting Bushing D Drill Blade J Jig d Drill Outer Diameter h Spacing Part

Claims (4)

[Claims] 1. A jig fitting part having an outer shape fitted to a jig for drilling and having a fitting hole formed so that a drill can be fitted therein, and a gap with the jig fitting part. And a drill guide portion having a drill hole portion, and a blade portion arranged in a row between the drill guide portion and the jig fitting portion so as to be engageable with the drill. Bush for cutting chips. 2. The blade portion is formed by cutting out one side surface of a cylindrical wall and forming a blade on at least one end portion.
Bush for cutting chips described. 3. The bush for cutting chips according to claim 1, wherein the blade portion is formed so that its length in the longitudinal direction is approximately equal to or approximately three times the outer diameter of the drill. 4. The chip cutting bush according to claim 1, wherein the blade portions are arranged on substantially the same side of the central axis in a plan view.