JPS6018253Y2 - broach tool - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a broach tool for forming grooves.

Conventionally, a groove forming broaching tool generally has a structure as shown in FIG.

That is, the tool 1 basically has a thin plate-like overall shape and a blade portion 1a having a cutting edge 1d on its upper edge;
The mounting base 1b is connected to the mounting base 1b.

The mounting base 1b is an essential part for mounting the broach tool 1 to the broach holder 3, and its shape etc. differs depending on the mounting method, e.g., tightening method. As shown in the figure, one side is formed as an inclined surface 1c, while the other side is formed as a vertical surface 1e.
The broach is stored in the broach mounting recess 3a and its vertical surface 1e.
is brought into contact with the vertical inner surface 3c of the recess 3a, and then the wedge 2
is fitted into the recess 3a to bring its inclined surface 2a into contact with the inclined surface 1c of the broach mounting base 1b, and then the mounting bolt 4 is passed through the through hole 2b of the wedge 2 and screwed into the threaded hole 3d on the bottom of the holder. and tighten.

By the way, as is well known, the broach tool uses expensive materials such as a vise (high speed steel) due to its nature as a cutting tool, and the conventional broach shown in FIG.
and the mounting base 1b are integrally manufactured in a vise.

However, the vise is originally required for the blade section la, especially the cutting edge 1d, and for the mounting base 1, which is not directly involved in cutting.
b may be ordinary steel.

The present invention was developed in view of the above-mentioned conventional circumstances.In contrast to the conventional idea of manufacturing a broach tool in one piece, including the blade part and the mounting base, the broach has two parts, the blade part and the mounting base.
Based on the basic idea of composing the broach with two members, in other words, the broach body and the broach mounting member, the broach mounting member can be made of ordinary steel, and the broach body is made of broach body mounting member. To provide a broach tool which can be held securely and firmly to a broach boulder through a broach.

The brochet tool according to the present invention has an overall shape of a thin long plate,
A broach main body having a cutting edge continuously formed on its upper longitudinal edge, and a plurality of parallel serration grooves or protrusions formed along the longitudinal direction at the lower part of one side; an elongated broach main body mounting member having a protrusion or serration groove along the longitudinal direction that fits into the serration groove or protrusion on the mating surface to the side surface;
Store the broach body and the broach body mounting member together in the broach mounting recess of the broach holder,
The present invention is characterized in that a tightening member such as a wedge or a mounting bolt is applied to the broach body attachment member so that the broach body is held between the broach body attachment member and the inner surface of the broach attachment recess.

The present invention will be specifically described below with reference to the second to sixth embodiments.

This broach tool is composed of a broach main body 10 shown in FIGS. 2 I and II, and a broach main body attachment member 15 shown in FIGS. 3 I and II, which is used in combination with the broach main body 10.

The broach main body 10 is formed, for example, into a thin, elongated plate shape using a vise.

A cutting edge 10b is continuously formed on the upper longitudinal edge, and on the other hand,
A plurality of parallel serration grooves 10c are formed along the longitudinal direction in the lower part of one side surface 10a.

The broach main body 10 is made of common steel, for example, and has an elongated shape.
The mating surface 15a to be aligned with the serration groove 10c has a plurality of protrusions 1 along the longitudinal direction that fit into the serration groove 10c.
5c, and the side surface opposite to the above-mentioned negative side surface 10a is formed into an inclined surface 15b.

As shown in FIG. 4, the broach body attachment member 15 is suitable for tightening and attaching a broach tool to the broach holder 3 using a wedge-type tightening member. Attachment of the broach main body 10 is as follows.

The broach body 10 and the broach body mounting member 15 are as follows:
The serration grooves 10c and the protrusions 15c are fitted together, and the broach is stored in the broach mounting recess 3a of the broach holder 3 with the groove surfaces 10a and 15a aligned.

One side 10e of the broach main body 10 has the above-mentioned recess 3.
It is brought into contact with the inner surface 3c of a.

Next, in the same manner as described for the conventional example with reference to FIG. Pass it through the through hole 2b of the wedge 2 and screw it into the screw hole 3d on the bottom of the holder and tighten.

As a result, the broach body attachment member 15 is pressed diagonally downward in the figure by the wedge 2, and the broach body 10 is held between the broach body attachment member 15 and the inner surface 3c of the recess 3a with a strong force.

As shown in the figure, the lower end of the broach body 10 is in contact with the bottom surface of the recess, so that the lower surface 15d of each protrusion 15c of the broach body mounting member 15 is in contact with each serration of the broach body 10, as clearly shown in FIG. By pressing the lower surface 10d of the groove 10c diagonally downward, the broach main body 10 is secured to the broach tool during the cutting operation as long as the tightening force by the tightening member consisting of the wedge 2 and the mounting bolt 4 is sufficient and reliable. 10, and in other words, it can be securely and firmly attached to the broach holder 3.

As mentioned above, the tightening method can be changed in various ways other than the above-mentioned wedge force method.

FIG. 6 shows an example of another tightening method.

This tightening method does not use a wedge to tighten the broach main body mounting member 15.
' is directly tightened and fixed with a mounting broach 4'.

In this example, the broach main body tightening member 15' has a generally elongated rectangular cross section, and has one side surface having a protrusion 15c; that is, the side surface 15 on the opposite side to the mating surface 15a.
'b is parallel to the mating surface 15a.

A notch 15'd into which a bolt 4' is inserted is formed at a predetermined position on this side surface 15'b.

70-When installing the chain tool, after storing the broach main body 10 and the broach main body mounting member 15' in the broach mounting recess 3a in the same manner as in the first embodiment, the mounting bolt 4 is
' into the screw hole 3d' formed at a predetermined position of the broach holder 3, and insert the tip into the notch 15'b.
At the same time, the bolt contact surface 15' of the notch 15d'
Press it against e.

As a result, the broach body attachment member 15' is pressed obliquely downward, as in the first embodiment, and the broach body 10 is firmly fixed to the broach holder.

In each of the above embodiments, the serration groove 1 is provided on the broach main body side.
0c, and a protrusion 15c is formed on the side of the broach body attachment member, but the present invention is not limited to this embodiment. It goes without saying that the strips may be provided on the broach main body side.

As is clear from the specific description of the above embodiments, the broach tool according to the present invention is constructed separately into the broach body and the broach mounting member. It is possible to use common steel, which is cheaper than a vise, for the members.

In addition, since the broach body is constructed in the shape of a thin long plate, the training ratio is improved, which makes it possible to provide a high-quality broach body, and when manufacturing the broach body, many pieces are stacked and processed at the same time. For example, it becomes possible to simultaneously apply a cutting edge, and from this point of view as well, the broach tool can be provided at a low cost.

Further, under normal usage conditions, the broach attachment member can be used semi-permanently.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing a conventional broach attached to a broach holder, Figures 2 and 6 show an embodiment of the present invention, and Figures 2 and 2 are a front view and right side view of the broach body. Figures 3 and 3 I and II are front and right side views of the broach body mounting member, and Figure 4 is the assembled broach body and broach body mounting member shown in Figures 2 I and U and Figures 3 I and II. Fig. 5 is an enlarged sectional view of the main part of Fig. 4, Fig.
The figure is a sectional view similar to FIG. 4 showing another embodiment. 1...Broach tool, 1a...Blade part,
1b...Mounting base, 1c...Slope, 1
d... Cutting edge, 1e... Vertical surface, 2...
...Wedge, 2a...Slanted surface, 2b...
・Through hole, 3...brooch holder, 3a・
...Broach mounting recess, 3c...Inner surface, 3d, 3d'...Screw hole, 4,4'...
...Mounting bolt, 10...Broach body, 10
a, 10e... One side of the broach main body 10, 1
ob...cut m, 10 c...serration groove, 10d...bottom surface of serration R10c, 15...broach body mounting member, 15a...
...Matching side surface, 15b...Slope, 15e
...Protrusion, 15d... Lower surface of protrusion 15e, 15'...Broach main body mounting member, 15'
b...One side, 15'd...Notch for bolt insertion, 15'e...Bolt contact surface.

Claims (1)

[Claims for Utility Model Registration] The overall shape is a thin long plate, and cutting edges are continuously formed on the upper longitudinal edge, while a plurality of parallel serration grooves or grooves are formed along the longitudinal direction at the bottom of one side. a broach main body formed with a protrusion; and a slender broach main body mounting member having a protrusion or serration groove along the longitudinal direction that fits into the serration groove or protrusion on a mating surface of the broach main body with respect to the above-mentioned side surface. The broach body and the broach body mounting member are stored together in the broach mounting recess of the broach holder;
A broach tool characterized in that a tightening member acts on the broach main body mounting member to sandwich the broach main body between the broach main body mounting member and the inner surface of the broach mounting recess.