JPS6119858Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a connecting device for a split type milling cutter consisting of a main body and an annular body.

Conventionally, milling cutters have been known that are divided into a main body that is fixed to the machine tool side and an annular body that is fixed to the main body in order to make it easier to handle when the diameter of the milling cutter increases and the weight increases. .

However, many methods of integrating the main body and the annular body are to provide a bolt through hole and a screw hole at a predetermined position on the lower or upper surface of the cutter, and to screw the bolt into the screw hole. are unified. In this case, the bolt tightening operation is performed from the bottom or top of the cutter, but this operation requires raising the milling cutter a certain amount from the workpiece or machine tool table, which reduces the time it takes to replace the annular body. The problem is that it takes a long time.

The present invention was developed in view of the above problem, and when attaching and detaching the annular body to the main body attached to a machine tool, the annular body can be attached and removed in a short time by operating from the outer circumferential side of the main body. This is how it was done.

The present invention is a milling cutter that removably integrates a main body with a shaft hole for mounting on a machine tool and a boss, a hole to be inserted into the boss, and an annular body with a tip fixed at a predetermined position on the outer periphery. a shaft hole for fitting the moving shaft is provided from the outer circumferential side of the main body toward the inside in the radial direction, and for fitting a connecting member that is outside the boss portion and partially penetrates the shaft hole for fitting the moving shaft; A shaft hole is formed in the axial direction of the main body, and a moving shaft having an inclined groove is inserted into the moving shaft fitting shaft hole, and a projection corresponding to the inclined groove of the moving shaft is inserted into the connecting member fitting shaft hole. By inserting a connecting member formed with a groove, engaging the protrusion in the groove, and moving the moving shaft back and forth in the radial direction of the main body, the connecting member is moved up and down in the axial direction of the member. ,on the other hand,
Rotating the annular body by a predetermined amount, the annular body having the through-hole of the annular body formed with a cross-shaped through-hole having a shoulder and a through-hole corresponding to the shaft hole for fitting the connecting member of the main body, passing through the head of the connecting member. A split type milling cutter in which an annular body is fixed to the main body by moving the moving shaft by a moving means with the head of the connecting member positioned at the shoulder and pulling up the connecting member in the axial direction of the member. It is a connecting device.

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

FIG. 1 shows a front view in section of a main part of a milling cutter using the device of the present invention, and FIG. 2 is a bottom view of FIG. 1.

The present invention consists of a main body 1 that is attached to a machine tool (not shown) and an annular body 2 that is detachably fixed to the main body.
It is composed of a connecting member 3 for fixing the main body and the annular body, a moving shaft 4 for moving the connecting member up and down, and a means for moving the moving shaft.

The main body 1 has a shaft hole 11 in the center and a means for attaching the cutter to a machine tool, such as a keyway 12 for preventing it from rotating. a shaft hole 15 for fitting a moving shaft in position;
Continuing from this, a recess 16 having a diameter larger than that of the shaft hole
Then, a screw hole 17 with a diameter larger than that of the recess is further continuously inserted.
At the same time, a shaft hole 19 for fitting a connecting member is formed with a portion of the shaft hole 15 opened from the lower surface side 18 of the main body.

The lower surface 18 of the main body is fitted into the boss portion 13 of the main body.
The annular body 2, which is removably fixed in close contact with the boss, has a fitting hole 21 corresponding to the boss and a recess at a predetermined position on the outer periphery. shoulder portions 23 that are fixed in a predetermined number by the shaft hole 19 of the main body and engage the through portion 21 and the coaxial portion through portion 22 of the connecting member head in correspondence with the shaft hole 19 of the main body;
A cylindrical through hole 24 having a diameter is provided.

The connecting member 3 that fixes the main body 1 and the annular body 2 includes a shaft portion 31 that allows fitting into the shaft hole 19 of the main body and a shaft penetration portion 22 of the annular body, and a shaft portion 31 that passes through the penetration portion 21 and is locked at a shoulder portion 23. A projection 33 (preferably a key) that engages with an inclined groove 42 of the moving shaft 4, which will be described later, is provided on the head 32 and the shaft at the position of the groove 42, and a connecting member is provided somewhat below the projection. 3 and a key groove 34 for fitting a key 9 which acts to prevent rotation of the moving member 4 is provided.

Also, a moving shaft 4 for vertically moving the connecting member 3 is provided.
The shaft part 41 has a diameter that fits into the fitting shaft hole 15 of the main body and can move backward, and an inclined groove 42 in which the protrusion 33 of the connecting member 3 is fitted is provided on the outer periphery of the shaft part. A screw 43 is carved at the end, and a keyway 44 is formed at the lower part of the outer periphery to engage the rotation-stopping key 9 so that the moving shaft can move back and forth in the longitudinal direction.

The main body 1 has a shaft hole 19 for fitting and a shaft hole 1 for fitting.
5 to the connecting member 3 and the moving shaft 4 to the key 9 and the protrusion 3.
3, the head 51 and the screw 52 corresponding to the screw 43 of the moving shaft 4 are inserted from the recess 16 of the main body.
The adjusting member 5 having a wrench hole 53 is screwed into the screw 43 of the moving shaft to set the screw 52 in place, and then the lid 6 having a screw 61 and a hole 62 is screwed into the screw hole 17 of the main body 1. to set the predetermined state.

By rotating the adjusting member 5 in a predetermined direction under the above conditions, the adjusting member 5 is in a fixed position with the moving shaft 4 facing forward (to the shaft hole 11 side) or backward (toward the outer peripheral side).
4), and the connecting member 3 moves up and down accordingly.

To attach the annular body 2 to the main body 1, first insert a wrench (not shown) through the hole 62 of the lid 6 on the outer periphery of the main body 14.
is inserted into the wrench hole 53 of the adjusting member 5, the adjusting member is rotated, the moving shaft 4 is advanced, and the connecting member 3 is positioned downward, and then the through part 21 of the annular body is inserted. By passing the head 32 of the connecting member and rotating the annular body 2 by a predetermined amount, the head is positioned on the shoulder 23 of the corrugated through hole 24, and the adjusting member 5 is rotated in the opposite direction. Move the connecting member 3
By pulling upward, an annular shape 2 is formed on the main body 1.
is fixed.

Note that a key may be provided at a predetermined position on the close contact surface between the main body 1 and the annular body 2 to prevent the annular body from rotating relative to the main body, or the inclined groove 42 of the moving shaft 4 may also be inclined in the opposite direction to that shown in the figure, and the protrusion 33 may be attached to this key. It may be made to correspond.

As described above, the present invention allows the annular body to be easily attached and detached from the main body by operating from the outer peripheral side of the main body.

[Brief explanation of the drawing]

Figure 1 shows a cross-sectional front view of the main parts of a milling cutter using the device of the present invention, and Figure 2 shows a front view of the milling cutter using the device of the present invention.
FIG. 3 is a bottom view of the figure. 1... Main body, 2... Annular body, 3... Connecting member,
4...Moving axis, 5...Adjusting member, 6...Lid, 7...
...Chip, 8...Wedge, 15...Shaft hole for fitting, 19
...Shaft hole for insertion.

Claims (1)

[Scope of utility model registration request] A milling cutter that is removably integrated with a main body having a shaft hole for attachment to a machine tool and a boss, a hole to be inserted into the boss, and an annular body with a tip fixed at a predetermined position on the outer periphery. A shaft hole for fitting a moving shaft is provided radially inward from the outer peripheral side of the main body, and a shaft hole for fitting a connecting member is provided outside the boss portion and partially penetrates the shaft hole for fitting the moving shaft. is formed in the axial direction of the main body, and a moving shaft having an inclined groove is inserted into the moving shaft fitting shaft hole, and a projection corresponding to the inclined groove of the moving shaft is formed into the connecting member fitting shaft hole. The connecting member is inserted into the groove, and the protrusion is engaged with the groove to move the moving shaft back and forth in the radial direction of the main body, thereby moving the connecting member up and down in the axial direction of the member. None, while
The annular body is rotated by a predetermined amount by passing through the head of the connecting member through the through-hole of the annular body, which has a cross-shaped through-hole having a shoulder portion and a through-hole corresponding to the shaft hole for fitting the connecting member in the main body. The annular body is fixed to the main body by moving the moving shaft by the moving means with the head of the connecting member positioned at the shoulder and pulling up the connecting member in the axial direction of the main body. Connection device for split type milling cutter.