JPH0717415U - Cutter tip mounting mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] To facilitate the work of attaching the chip to the cutter body and setting the dimensions. [Structure] On the outer peripheral edge of the front end of a cutter body 1, concave groove-shaped chip mounting seats 2 are formed at equal intervals. A throw-away tip 4 and a wedge member 6 for fixing the tip 4 are fitted in the tip mounting seat 2. A notch 14a is formed on the side surface 14 of the wedge member 6, and the disc spring 13 is inserted into the notch 14a in a compressed state and temporarily fixed. The disc spring 13 is a wedge member 6.
And the wall surface 5 of the chip mounting seat 2 are pressed against each other in an elastically deformed state. A reverse screw 8 is screwed onto the wedge member 6, and the bottom surface 7
It is screwed into the screw hole 7a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tip mounting mechanism for a cutter in which a throw-away tip or the like is detachably mounted on a cutter body such as a face milling cutter.

[0002]

[Prior art]

 Conventionally, for example, an example of a throw-away type front milling cutter is shown in FIGS. 4 and 5. On the outer peripheral portion of the tip of the cutter body 1, a plurality of recessed groove-shaped chip mounting seats 2 that are open to the outer peripheral side and the distal side are formed at equal intervals in the circumferential direction. In the tip mounting portion shown in FIG. 5, a disc-shaped throw-away tip 4, for example, is disposed in contact with the wall surface 3 located forward of the tip mounting seat 2 in the rotation direction. A wedge member 6 for pressing and positioning the chip 4 in the direction of the wall surface 3 is fitted between the mounting seat 2 and the wall surface 5 located rearward in the rotational direction. This wedge member 6 is provided with a stepped screw hole 6a which can communicate with a screw hole 7a formed in the bottom surface 7 of the chip mounting seat 2, and the wedge member 6 is pushed by a screw 8 to push the wedge member 6a. By fixing it to 1, the throw-away tip 4 is firmly fixed and held at a predetermined position.

The screw 8 has a screw thread portion 8a on the head side formed with, for example, a right screw (or left screw), and a screw thread portion 8b on the tip side with a reverse screw formed with a left screw (or right screw). Is becoming. Then, the screw hole 6a of the wedge member 6 with which the head side screw thread portion 8a is screwed is formed for the right screw, and the screw hole 7a of the bottom surface 7 with which the tip side screw thread portion 8b is screwed is formed for the left screw. Has been done. Therefore, when the screw head 8 is screwed into the wedge member 6 and the screw 8 is screwed into the screw hole 7a of the bottom surface 7, the wedge member 6 enters the chip mounting seat 2. . Further, the throw-away tip 4 has a cutting edge 4a formed on the ridge line portion on the upper surface thereof, and the flank 9 thereof is fixedly held in the tip mounting seat 2 from the bottom surface 7 of the tip mounting seat 2. It sits on the chip support surface 7b which is slightly raised. Further, on the front end surface of the cutter body 1 and on the peripheral side surface, adjacent surfaces on the front side in the rotation direction of the throw-away tip 4 are formed with a concave portion in a curved shape to form a chip guiding notch 10.

[0004]

[Problems to be solved by the device]

 By the way, in such a tip mounting mechanism, when the throw-away tip 4 is to be replaced or the blade edge position is to be switched, the tip-away seat 4 can be attached to the tip-mounting seat 2 by attaching the throw-away tip 4 to the tip-mounting seat 2. After pushing the throw-away tip 4 against the wall surface 3 and fitting the wedge member 6 in which the screw 8 is screwed into the stepped screw hole 6a between the tip 4 and the wall surface 5, the operator inserts the wedge member 6 or While holding the chip 4 with one hand, the screw 8 had to be screwed into the screw hole 7a with the other hand to fix it. The work of attaching the throw-away tip 4 is complicated and time-consuming. Further, when the size of the chip 4 is measured, the position of the chip 4 must be adjusted while pressing the wedge member 6 with one hand, and this work is similarly complicated.

In view of such problems, an object of the present invention is to provide a tip mounting mechanism for a cutter, which facilitates a tip mounting operation and dimensioning.

[0006]

[Means for Solving the Problems]

 The tip mounting mechanism of the cutter according to the present invention has a grooved tip mounting seat formed at a predetermined interval on the outer peripheral edge of the tip of the cutter, and the tip and the chip are fixed in the tip mounting seat. In the tip mounting mechanism of the cutter to which the wedge member is fitted, the tip mounting seat is fitted with an elastic member for pressingly holding and temporarily fixing the tip and the wedge member. To do.

The elastic member is a disc spring that presses the side surface of the wedge member.

Further, the elastic member has a substantially U-shaped cross section including a curved first surface portion that presses the side surface of the wedge member or the chip, and a second surface portion and a third surface portion located on the upper surface and the bottom surface of the wedge member. It is characterized by consisting of a leaf spring.

[0009]

[Action]

 When mounting the chip to the chip mounting seat, by mounting the elastic member in addition to the chip and the wedge member inside the chip mounting seat, the chip and the wedge member are pressed against the wall surface of the chip mounting seat, so the chip is locked. Temporarily fixed, the operator can easily perform the fixing work and the dimensioning of the tip without pressing the tip.

The disc spring presses the wedge member, and the chip is also pressed and temporarily fixed.

The wedge member is pressed by the first surface portion of the leaf spring and the chip is also pressed, or the wedge member and the chip are directly and simultaneously pressed in opposite directions to be temporarily fixed. Since the spring has a U-shaped cross section and is locked to the wedge member, it cannot be disengaged by centrifugal force.

[0012]

【Example】

 Hereinafter, a first embodiment of the present invention will be described with reference to FIG. FIG. 1A is a side view of the outer periphery of the tip mounting portion, and FIG. 1B is a sectional view parallel to the tip surface of the cutter body. In the present embodiment, the wedge member 6 has a rectangular parallelepiped cutout 12a having an opening on the upper surface along the wall surface 5 on the side surface 12 facing the wall surface 5 of the chip mounting seat 2. Then, with the throw-away tip 4 and the wedge member 6 mounted on the tip mounting seat 2, the disc spring 13 is mounted in the notch 12a in a compressed and deformed state. As a result, the elastic force of the disc spring 13 presses the wedge member 6 and the throwaway tip 4 before screwing in the direction of the wall surface 3 and temporarily fixes them.

Since the present embodiment is configured as described above, when the throw-away tip 4 is attached to the cutter body 1, the throw-away tip 4 is brought into contact with one wall surface 3 in the tip mounting seat 2. The wedge member 6 is inserted into the chip mounting seat 2 while the screw 8 is screwed into the screw hole 6a of the wedge member 6. Then, the disc spring 13 is inserted into the notch 12a in a compressed and deformed state. As a result, the disc spring 13 is elastically deformed between the side surface of the wedge member and the other wall surface 5, and the elastic force causes the wedge member 6 and the throw-away tip 4 to be pressed against the one wall surface 3 side and locked. Will be temporarily stopped.

In this state, even if the operator does not support the wedge member 6 and the throw-away tip 4, these members do not drop or move. Further, even if the throw-away tip 4 is slightly moved for dimensioning or the like, it is stopped and held at an arbitrary position, and dimensioning is easy. Then, if the screw 8 is then screwed into the screw hole 7a of the bottom surface 7, the wedge member 6 is pushed toward the bottom surface 7 side, and the attachment of the throw-away tip 4 is easily completed with one hand.

As described above, according to this embodiment, the insertable seat 2 can be temporarily fixed with the throw-away tip 4 and the wedge member 6 fitted together. Can be performed easily with one hand, improving workability. Moreover, there is an important practical advantage that work such as dimensioning of the throw-away tip 4 in the temporarily fixed state can be performed easily and easily.

FIG. 2 shows a second embodiment of the present invention. FIG. 2A is a side view of the outer periphery of the tip mounting portion, and FIG. 2B is a sectional view parallel to the tip surface of the cutter body. In this embodiment, a rectangular parallelepiped notch 17 is formed on the wall surface 5 of the chip mounting seat 2 facing the side surface 12 of the wedge member 6. Then, with the throw-away chip 4 and the wedge member 6 mounted on the tip mounting seat 2, the countersink 13 is mounted in the cutout 17 in a compressed and deformed state, and the wedge member 6 is elastically pressed by the side surface 12. It will be.

FIG. 3 shows a third embodiment of the present invention. FIG. 3A is a side view of the outer periphery of the tip mounting portion, and FIG. 3B is a sectional view parallel to the tip surface of the cutter body. In this embodiment, a leaf spring 19 having a substantially U-shaped cross section is used, and the leaf spring 19 has a curved first surface portion 19a, a flat second surface portion 19b and a third surface portion 19c. Has been formed. Then, with the throw-away tip 4 and the wedge member 6 mounted in the tip mounting seat 2, the first surface portion 19a is sandwiched between the throw-away tip 4 and the wedge member 6, and the second surface portion 19b is the wedge member. 6, and the third surface portion 19c is in pressure contact with the lower surface. In the case of the present embodiment, it is necessary that the leaf spring 19 is elastically deformed into a flat shape in the mounted state and is sandwiched between the chip 4 and the side surface of the wedge member 6 without any gap, and the chip 4 is pressed. In this state, the temporary fixing of the throw-away tip 4 is completed. With this configuration, the tip 4 is firmly and temporarily fixed. Further, the leaf spring 19 will not come off due to centrifugal force when the cutter body rotates.

When a flat sheet member or the like is interposed between the wall surface 3 in the tip mounting seat 2 and the throw-away tip 4, the above-mentioned plate is provided between the seat member and the throw-away tip 4. The spring 19 may be attached. Alternatively, the leaf spring 19 may be mounted between the wall surface 5 of the tip mounting seat 2 and the side surface 12 of the wedge member 6. Further, the disc spring 13 and the leaf spring 19 form an elastic member.

[0019]

[Effect of device]

 As described above, according to the tip attaching mechanism of the present invention, the tip attaching seat is provided with the elastic member for pressing and holding the tip and the wedge member to temporarily fix them. The tip and the wedge member can be temporarily fixed during the work, and the worker can easily perform the subsequent fixing work with one hand without pressing the wedge member or the like, which improves the workability. Moreover, there is an important practical advantage that work such as dimensioning of the throw-away tip in the temporarily fixed state can be performed easily and easily.

[Brief description of drawings]

FIG. 1 shows a tip mounting portion of a cutter body according to a first embodiment of the present invention, (A) is a side view of the tip mounting portion, and (B) is parallel to the tip of the cutter body of the tip mounting portion. FIG.

FIG. 2 shows a second embodiment of the present invention,
(A) is a side view of the tip mounting portion, and (B) is a sectional view parallel to the tip of the cutter body of the tip mounting portion.

FIG. 3 shows a third embodiment of the present invention,
(A) is a side view of the tip mounting portion, and (B) is a sectional view parallel to the tip of the cutter body of the tip mounting portion.

FIG. 4 is a front view of a main part of a conventional throw-away tip type front milling cutter.

5 is a cross-sectional view of the tip mounting portion in FIG. 4 parallel to the tip of the cutter body.

[Explanation of symbols]

 1 Cutter main body 2 Tip mounting seat 4 Throw-away tip 6 Wedge member 13 Disc spring 19 Leaf spring

Claims (3)

[Scope of utility model registration request] 1. A cutter mounting seat in the form of a groove is formed at a predetermined interval on the outer peripheral edge of the tip of a cutter, and a chip and a wedge member for fixing the chip are fitted in the seat mounting seat. In the tip mounting mechanism of the cutter, an elastic member for pressing and temporarily holding the tip and the wedge member is fitted to the tip mounting seat. 2. The chip mounting mechanism according to claim 1, wherein the elastic member is a disc spring that presses a side surface of the wedge member. 3. The elastic member has a substantially U-shaped cross section composed of a curved first surface portion that presses a side surface of a wedge member or a chip, and a second surface portion and a third surface portion located on an upper surface and a bottom surface of the wedge member. The tip mounting mechanism according to claim 1, wherein the tip mounting mechanism is formed of a letter-shaped leaf spring.