JPS5938975Y2 - milling cutlet - Google Patents

Description

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

Conventional milling cutters attach one or more cutters to a milling arbor via keys, position these cutters at predetermined intervals using multiple spacer collars, and then tighten them with nuts from the arbor end. is generally fixed.

However, when replacing the above cutter,
It is necessary to remove the nut, collar, and cutter from the milling arbor in order, and then insert and fix the desired cutter and other parts into the arbor in the reverse order of the above. Therefore, it takes a lot of time to replace the cutter. This is labor-intensive and, of course, machining of the workpiece is interrupted during that time, which has a negative impact on productivity.

The present invention has been proposed to solve the above-mentioned disadvantages, and its purpose is to provide a cutter whose cutting blades can be easily and quickly replaced, thereby improving productivity.

The cutter of the present invention has a feature in that the cutter can be replaced without removing the nut or collar from the milling arbor.Examples of the cutter will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the cutter of the present invention includes a face plate 10, a cutting blade unit 20 divided into at least two parts attached to the face plate 10, and a cutting blade unit 20 that is pressed against the face plate 10. , a pressing member 30 fixed concentrically with the milling arbor.

The face plate 10 has a shaft hole 11 that is attached to the milling arbor S via a key, and a cutting blade unit mounting reference surface 13 concentric with the arm μS is provided on the seat surface 12 side to which the cutting blade unit 20 is attached. A boss 15 having a male thread 14 is formed on the outer periphery of the tip.

The face plate 10 also includes a key 1 protruding from the seat surface 12.
6 is provided.

The cutting blade unit 20 has cutting blades 21 arranged at appropriate intervals on the outer periphery, and the inner peripheral surface of the cutting blade unit 20 is arranged along the reference plane 13 of the face plate.

This cutting blade unit has a tapered surface 22 formed on one end surface facing the pressing member 30, and a key groove 23 corresponding to the key 16 on the other end surface joined to the seat surface 12 of the face plate. It is provided.

Note that the keyway 23 and the key 16 are connected to the cutting blade unit 2.
When the 0 is attached to the face plate 10, the two are engaged to prevent rotation, but their positional relationship may be reversed to that described above.

Further, the rotation preventing means is not limited to the combination of a key and a keyway, and other structures may be arbitrarily adopted.

Next, the pressing member 30 includes a female thread 31 that engages with the male thread 14 of the face plate boss, and a tapered surface 22 of the cutting blade unit.
A tapered surface 32 corresponding to this is formed, and a plurality of tightening holes 33 are further provided on the rear surface.

By tightening this pressing part 30, the cutting blade unit 2
0 to the face plate 10 and fix it, but the fifth
A so-called crab-eye type spanner A shown in the figure is used, and the pins B protruding from the tips of both arms of this spanner are inserted into the tightening holes 3.
3 to rotate the pressing member 30.

Note that the pressing member 30 is tightened as shown in FIG.
A plurality of screw holes 17 are provided in the end face of the face plate 10, and a bolt 34 whose head engages with the pressing member 30 is inserted, and the bolt 34 is screwed into the screw hole 17 and tightened. You can also do that.

Furthermore, in the cutter described above, the cutting blade unit 20 is positioned only at one location on the mounting reference surface 13 formed on the boss 15 of the face plate. An edge 19 having a mounting reference surface 18 concentric with the milling arbor S is provided on the outer periphery of the face plate 10, and the inner and outer peripheral surfaces of the cutting blade unit 20 are aligned with the reference surfaces 13 and 18, respectively. It's okay.

In that case, the tapered surface 22 of the cutting blade unit and the tapered surface 32 of the pressing member are inclined in the opposite direction to that of the cutter shown in FIGS. It is possible to press the part 19.

The structure of the cutter of this invention is as described above, and its operation will be explained below.

First, in the case of the cutter having the configuration shown in Figs. 1 to 3,
When the pressing member 30 is rotated in a certain direction or tightened by operating the bolt 35, the tapered surface 32 of the pressing member 30 comes into contact with the tapered surface 22 of the cutting blade unit, and the cutting blade unit 20 is positively pressed against the seat surface 12 of the face plate. Press.

At the same time, the inner circumferential surface of the cutting blade unit is pressed against the reference surface 13 of the face plate boss by the component force at that time, and centering is performed.

In the cutter shown in FIG. 4, the cutting blade unit 20 is fixed to the face plate 10 in the same manner as described above, but in this case, the tapered surfaces 22 and 32 are in the opposite direction from the previous one, so tightening is difficult. The force component of time acts towards the outer circumference of the cutter, so that the cutting blade unit 20 is pressed against the seat surface 12 of the face plate and the edge 19, and is centered by the reference surface 18 of the edge.

In the cutting blade unit 20 mounted on the face plate 10 as described above, the rotational force of the earth S is transmitted to the cutting blade 21 via the face plate 10 and the key 16, thereby machining a workpiece.

As mentioned above, the cutter of the present invention has a cutting blade unit divided into two or more parts fixed to the face plate supported by the milling arbor using a pressing member, so that
To replace the cutter, you only need to operate the pressing member to replace the cutting blade unit. This eliminates the work of attaching and removing nuts and collars that were previously required, speeding up the replacement work.
The labor burden required for this is also reduced.

Furthermore, since the cutting blade unit is automatically centered and positioned concentrically with the milling arbor by the action of the pressing member and the tapered surface formed on the cutting blade unit, there is an advantage that no special centering work is required.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway plan view showing the cutter of the present invention, Fig. 2 is a sectional view taken along the line ■-■ of the same, Figs.
The figure is a sectional view showing a part of another embodiment σ) of the present invention, and FIG. 5 is a perspective view showing an example of a spanner used for tightening and loosening the cutter of the present invention. 10... Face plate, 12... Seat surface, 13.
...Mounting reference surface, 14...Male thread, 15
...Boss, 16...Key 17...
...Screw hole, 18...Mounting reference surface, 19...
... Edge, 20 ... Cutting blade unit, 22
...Tapered surface, 23 ...Keyway, 30
...Press member, 31...Female thread, 32
...Tapered surface, 33...Tightening hole, 34
...Bolt, S...Milling arbor.

Claims (1)

[Scope of utility model registration request] A face plate provided with a reference plane concentric with the milling arbor, a ring-shaped cutting blade unit divided into at least two parts positioned according to the reference plane and attached to the face plate via a rotation prevention means, and formed on the face plate. a pressing member that is threadedly engaged with a boss or attached to the face plate by bolts and presses the cutting blade unit against the mounting seat surface of the face plate and a reference surface; A milling cutter in which a tapered surface is formed on one end surface of the cutting member, and a tapered surface corresponding to the tapered surface of the cutting blade unit is formed on the suppressing member so that the respective tapered surfaces are engaged with each other.