JPS6026886Y2 - Milling cutter - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a milling cutter, and its purpose is to facilitate work and improve safety when replacing a ring-shaped milling cutter that is divided into a plurality of parts.

In order to facilitate the replacement of the milling cutter fixed on the milling arbor, the ring-shaped milling cutter is divided into at least two parts, a face plate is provided on the milling arbor, and the milling cutter is attached to the face plate. The applicant of the present invention proposed a milling cutter which is fixed by a pressing member.
No. 61717.

The present invention is a split-type milling cutter that has been further improved to prevent the milling cutter from falling off the face plate when the pressing member is removed.

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

In FIG. 1, 1 is a ring-shaped cutter divided into two parts.

This cutter 1 has a rearward key groove 1a on one side thereof.
A tapered surface 2 is formed on the inner ring surface of the other side.

3 is a face plate on which the cutter 1 is mounted.

This face plate 3 has a shaft hole 3a that is attached to the milling arbor of the enclosure via a key, and a cutter mounting reference boss concentric with the milling arbor and a key groove 1 of the cutter 1.
A key 5 corresponding to a is provided.

Reference numeral 6 denotes a pressing member that presses the cutter 1 against the face plate 3 and the cutter attachment reference boss 4.

This pressing member 6 is tightened and fixed to the end face of the cutter attachment reference boss 4 by bolts 8, and has a tapered surface 7 that comes into contact with the tapered surface 2 formed on the inner ring surface of the cutter 1.

Note that the pressing member of the cutter 1 is not limited to bolt tightening, but may be a screw tightening method by providing a screw on the cutter attachment reference boss 4.

The present invention relates to a milling cutter having the above-mentioned structure, and the first embodiment, as shown in FIGS. 1 and 2, is equipped with an engaging member 9 that can be retracted from the surface of the face plate 3 that faces the cutter,
The cutter 1 is provided with a bushing member 10 into which the engaging member 9 is recessed from the surface of the face plate 3.

To explain in more detail, the engaging member 9 is formed with a flange 12 that also serves as a stopper for stopping the end protruding from the surface of the face plate 3, and a support hole 11 opened in the thickness direction of the face plate 3.
It is slidably housed inside.

A pressing spring 1 is provided between the spring receiver 14 screwed to the opening of the support hole 11 and the flange 12.
3 is interposed, and always presses and biases the retaining member in a direction protruding from the surface of the face plate 3.

On the other hand, on the cutter 1 side, an engagement hole 15 into which the engagement member 9 enters and engages is formed on a surface corresponding to the engagement member 9, and a bushing member 10 engages the engagement member 9 on the opposite surface. Matching hole 15
A hole 17 having a depth corresponding to the retraction stroke required for further disengaging is bored, and the bushing member 10 passes through the hole 17 and the engagement hole 15 in a free state.

Reference numeral 16 denotes a flange provided at the tip of the bushing member 10, which faces and abuts against the end surface of the engagement member 9.

In the first embodiment having the above configuration, when the cutter 1 is normally attached to the face plate 3, as shown in FIG. It enters into the retaining hole 15 and is engaged.

Therefore, even if the pressing member 6 is removed when replacing the cutter 1, the cutter 1 is held on the face plate 3 by the retaining member 9.

To remove this cutter 1 from the face plate 3, cutter 1
By supporting the button with both hands and pushing the bushing member 10 with the fingertips, the engaging member 9 sinks into the support hole 11 against the elastic force of the pressing spring 13 and is engaged, as shown in FIG. 2B. The engagement with the hole 15 is released.

Therefore, the cutter 1 can be safely and easily removed and replaced without falling.

Next, a second embodiment of the present invention will be described with reference to FIGS. 3 and 4.

The structures of the cutter 1, face plate 3, pressing member 6, etc. are the same as those shown in FIG.

In the second embodiment, an engagement hole 18 is provided on the face plate 3 side, and a retaining member 21 is retractably mounted on the cutter 1 side.

That is, the face plate 3 is provided on the cutter 1 side, and a support hole 20 corresponding to the engagement hole 18 is provided, and the engagement member 21 is inserted into the support hole 20.
is supported by a pressing spring 22 so that it can be moved in and out by being pressed in the projecting direction.

Further, a lever 19 is pivotally attached to the rear end of the engaging member 21 by a pin 23.

A concave portion 24 is provided on the surface of the cutter 1 where the lever 19 is located, and a support portion 25 on which the intermediate portion of the lever 19 is abutted and supported is formed in the concave portion 24.

In the second embodiment, in the normal state in which the cutter 1 is attached to the face plate 3, the engaging member 21 enters and engages in the support hole 18 of the face plate 3, as shown in FIG. 4A.

Therefore, as in the first embodiment, even if the pressing member 6 is removed, the cutter 1 is held by the face plate 3 and prevented from falling.

To release this engagement, push the lever 19 with your fingertip, the lever 19 pivots around the pin 23 into the concave portion 24, and uses the support hole 25 as a fulcrum to push the retaining member 21 into the spring. 22, and is removed from the engagement hole 18 and recessed into the support hole 20.

As described above, according to the present invention, when replacing the ring-shaped split cutter, removing the pressing member prevents the cutter from falling unexpectedly, allowing the work to be carried out in a safe manner.

Further, since the engagement between the cutter and the face plate can be disengaged with a single touch using the fingertip of the hand supporting the cutter, the work can be done easily and quickly.

Furthermore, if the strength of the retaining member is set to be sufficient for rotation transmission, there is no need for a locking key protruding from the face plate, and the engagement member can perform the economical locking function for rotation transmission. It also has advantages.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of the present invention, Fig. 2 A and B are sectional views explaining the operating state of the main parts of the invention, Fig. 3 is an exploded perspective view showing another embodiment, and Fig. 4 is an exploded perspective view of the present invention. It is a sectional view explaining the operating state of the main part. 1... Cutter, 3... Face plate, 6...
...Press member, 9...Engagement member, 10...
... Bush member, 13 ... Pressing spring, 15, 18 ... Engagement hole, 19 ...
Lever, 21...Engagement member, 22...
Spring, 24... Concave portion, 25...
・Fulcrum part.

Claims (1)

[Scope of utility model registration request] a face plate with a protruding cutter mounting reference boss concentric with the milling arbor; a ring-shaped cutter divided into at least two halves to be positioned according to the cutter mounting reference boss and mounted on the face plate; In a milling cutter comprising a pressing member that presses against the face plate and the cutter, an engaging member that permanently engages the face plate and the cutter in a retractable manner and disengages the engaging member. A milling cutter characterized in that a member is provided on the face plate and the cutter.