JPS5837531Y2 - Milling cutter - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a milling cutter.

An object of the present invention is to easily and quickly replace the cutter on the milling upper, thereby improving productivity.

Generally, in a milling cutter, one or more cutters are keyed to a milling upper, predetermined spacing positions are determined by a number of spacer collars, and the cutters are tightened and fixed from one end of the milling upper with a nut.

Therefore, when replacing the cutter as necessary, the nut, collar and cutter are removed from the milling upper, the desired cutter is inserted, the collar is then inserted and the nut is tightened again.

Therefore, a considerable amount of time and effort is required to replace the cutter, and during this time, processing of the workpiece is naturally interrupted, resulting in problems that affect productivity.

The present invention solves these conventional problems, and its feature is that only the cutter can be attached to and replaced from the milling arbor without removing the nut or collar from the milling arbor.

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

First, the components of the present invention include a ring-shaped cutter divided into at least two or more parts, a face plate that holds the cutter, and a pressing member that presses the cutter against the face plate and fixes it concentrically with the milling arbor. It is composed of three elements.

A specific example of this configuration is shown in FIG. 1, where 1 is a ring-shaped cutter divided into two.

This cutter 1 has a radial keyway 1a on one side, and a tapered surface 2 on the inner ring surface on the other side.

3 is a face plate.

This face plate 3 has a shaft hole 3b that is attached to the milling arbor S via a key as shown in FIGS. A key 5 corresponding to the groove 1a is provided.

The key groove 1a of the cutter 1 and the key 5 of the face plate 3 are integrally connected to prevent rotation when the cutter is attached to the face plate 4, and the relationship between the key and the key groove is the reverse of the above. Alternatively, other anti-rotation structures may be optionally adopted.

6 is an annular pressing member.

This pressing member 6 is tightened and fixed to the end of the cutter attachment reference boss 4.

An arcuate tapered surface 2 concentric with the cutter attachment reference boss 4 is formed on one side of the cutter 1 that the pressing member 6 comes into contact with, and the pressing member 6 has an annular tapered surface 2 that is wedged into the tapered surface 2. It has a tapered surface 7.

Numeral 8 is a bolt for tightening and fixing the pressing member 6.

Instead of this tightening and fixing method using bolts 8, it is also possible to use a tightening and fixing method using screws as shown in FIG.

That is, the cutter attachment reference boss 4 has a structure in which a male thread 9 is cut on the outer peripheral surface of the end thereof, and a female thread 10 is cut in the pressing member 6.

Furthermore, the attachment reference position of the cutter 1 is determined at one location on the cutter attachment reference boss 4 in FIGS. 1 and 2, but in order to ensure completeness, it is set at two locations, one on the inside and the outer circumference of the cutter 1. You can also do that.

That is, as shown in FIG. 3, an edge 3a concentric with the milling arbor S is provided on the outer periphery of the face plate 3, and the tapered surface 2a of the cutter 1 and the tapered surface 7a of the pressing member 6 are formed as shown in FIGS. 1 and 2. The tapered surface 2.7 is inclined in the opposite direction.

Since the present invention has the structure as described above, in the case of the structure shown in FIGS. 1 and 2, the cutter 1 divided into two parts as shown in FIGS. It comes into contact with the mounting reference boss 4 and the face plate 3, and is inserted and fixed by the pressing member 6.

The action of pressing the cutter 1 by the pressing member 6 is to positively press the cutter 1 in the direction of the cutter attachment reference boss 4 by means of the tapered surfaces 2 and 7, and to press the cutter 1 against the face plate 3.

In addition, in the case of the configuration shown in FIG. 3, as shown in FIG. 6, by tightening the pressing member 6, the tapered surfaces 2a, 7a have the effect of pressing the cutter 1 against the outer peripheral edge 3a of the face plate 3.
The cutter 1 can be centered and positioned by this edge 3a and the cutter attachment reference boss 4.

The cutter 1 mounted on the face plate 3 in this manner transmits the rotational force of the milling arbor S via the face plate 4 and the key 5, and processes a workpiece.

When replacing the cutter 1, the cutter 1 divided into two parts can be easily removed from the face plate 3 by tightening the pressing member 6, and replacement can be completed in a short time by replacing it with another cutter.

According to the present invention, a ring-shaped cutter divided into a plurality of parts is formed on one side of the cutter as a means for centripetally pressing and fixing the cutter to the surface of the face plate mounted on the milling arbor and the cutter mounting reference boss. The annular tapered surface formed on the annular pressing member fully faces and wedges into the circular arc-shaped tapered surface concentric with the cutter mounting reference boss, so the pressing area is large and the large surface pressure provides a strong clamping force. It is fixed in place.

Further, by attaching one annular pressing member to the boss, a plurality of divided cutters can be fixed to the face plate at once, and there is an effect that assembly and disassembly of the divided cutters can be achieved quickly and easily.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of the present invention, Figs. 2 and 3 are exploded perspective views of main parts showing other embodiments of the invention, Fig. 4;
5 and 6 are assembled sectional views of each embodiment of the present invention. 1... Cutter, 2, 2 a... Tapered surface, 3... Face plate, 4... Cutter installation reference boss, 5... Key, 6... Pressing member, 7, 7 a... Tapered surface.

Claims (1)

[Scope of utility model registration request] a face plate provided with a cutter mounting reference boss concentric with the milling arbor; a ring-shaped cutter divided into at least two or more parts, which is positioned according to the cutter mounting reference boss and is mounted on the face plate while being prevented from rotating; and the cutter. It consists of an annular pressing member that can be tightened to the mounting reference boss and presses the cutter against the face plate and the cutter mounting reference boss, and one side of the cutter that the pressing member comes into contact with has a ring concentric with the cutter mounting reference boss. A milling tool characterized in that an arc-shaped tapered concave surface is formed, and the pressing member has an annular tapered surface that wedges into the tapered concave surface.