JPH07214415A - Throw-away type cutter - Google Patents

Abstract

PURPOSE:To enable the replacement tips of a throw-away type cutter in which a mounting reference seat of throw-away tip is provided only on one face per tip and adjustment of deflection of an edge at edge tip reference. CONSTITUTION:A position reference face 10 and a mounting cylindrical section 9 are provided in the vicinity of a center in front of a cutter body 2. Further, a boss section 14 which is screwed in the mounting cylindrical section, a plane 17 adhered on the position reference face 10, and a jig 13 having a set reference face 18 of tip are attached, and the jig is attached to a cutter body 2 when a tip is mounted to position a throw-away tip 5 by both of the set reference face 18 and a mounting reference seat 3 provided on the cutter body. For this reason, it is possible to perform the replacement of tips and adjustment of deflection of a edge at edge tip reference on a throw-away type cutter, thus omitting labor and time for dismounting mounting the cutter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION In the present invention, the insert reference seat of the throw-away tip provided on the cutter body has only one surface per tip, and therefore, tip replacement and blade runout adjustment must be performed outside the machine. The present invention relates to a throw-away type cutter that allows you to do things that were not there on board.

[0002]

2. Description of the Related Art A cutter body is provided with a groove cut out obliquely on the outer periphery of the tip, a bottom surface of the groove serves as a tip mounting reference seat and one side serves as a support seat, and a throw-away tip is provided between the support seat and a wedge type presser foot. The throw-away cutter, which sandwiches and holds the insert, is easy to manufacture, unlike a cutter in which a bag groove that requires high-precision machining is provided on the body and the chip is positioned on the two sides of the groove. It is known that there is no problem of increasing the number of parts and the number of machining points found in a cutter that facilitates high precision machining, and it is advantageous in terms of cost, but it is difficult to adjust the blade runout. That is, this type of cutter has no reference for positioning the throw-away tip in the cutter axial direction because the seat groove is cut out. For this reason,
When the throw-away tip is attached to this type of cutter, the cutter 1 is set on this jig by using the adjusting jig A as shown in FIG. 7, and the throw-away tip is attached to the probe B at the tip of the cage of the jig. A method is adopted in which the tip edge of No. 5 is pressed to observe the swing of the cage G and the blade runout accuracy of the front face is secured.

[0003]

In the blade runout adjustment by the method of FIG. 7, it is necessary to remove the cutter from the processing machine once,
There is a large loss of work. Also, 1 throwaway tip
Since it is necessary to adjust the position of the cutting edge by pressing each piece from the lower side to the upward direction, the work efficiency is poor, and in the case of a multi-blade cutter, it takes a lot of time to replace the tip and adjust the runout of the blade.

Therefore, the groove into which the tip is inserted is made into a blind groove, and a blade runout adjusting mechanism using a wedge or a screw is incorporated between the inner wall of the groove and the throw-away tip to replace the tip on the machine. Technology has been developed to enable blade runout adjustment (Japanese Utility Model Laid-Open No. 5-9823, etc.), but this cutter is also more difficult to process blind grooves than (1) through-grooves that cut through both ends, (2) The blade runout adjustment mechanism is complicated and (3) the cost is inevitable because of the large number of parts.

Therefore, it is an object of the present invention to realize and provide a cutter which can perform tip replacement and blade runout adjustment both on and off the machine and which can be manufactured inexpensively with a small number of parts and processing points. I am trying.

[0006]

In order to solve the above problems, the present invention provides an annular position reference surface near the center of the front surface of the cutter body at a right angle to the cutter axis, and further, the position reference surface is provided on the position reference surface. A disc-shaped jig having a flat surface to be in close contact with and a chip reference plane parallel to the flat surface, and a means for attaching this jig to the cutter body are attached, and the jig is attached when the throw-away chip is mounted. Attached to the cutter body,
The throw-away tip was pressed against the set reference surface of this jig to align the front cutting edge.

As the jig attaching means to the cutter body, several means as shown in the embodiments to be described later can be considered. Also, the jig is removed from the cutter body after the tip replacement and blade runout adjustment.

Next, as another means for solving the above problems, in the present invention, a bolt is provided at the cutout end side of the through groove to the outer periphery of the cutter body, and the bolt supported by being screwed into the cutter body. A configuration is adopted in which a head having a circular cross section is projected into the through groove, and the side surface on the rear side of the tip is positioned by the head by using this head as a position reference in the cutter axial direction of the throw-away tip.

This axial positioning bolt may be installed together with the tool having the above-mentioned jig. Further, it is desirable that the bolt is attached to the cutter body so that the screwing amount can be adjusted so that the screwing direction is parallel to the through groove or diagonally intersects with the through groove. Furthermore, it is desirable to add loosening preventing means to the bolt to increase the frictional resistance with the screw hole and stop the fluctuation of the screw-in amount. The specifics of the loosening prevention means will be described in the section of Examples.

[0010]

According to the construction of claim 1 in which the disc-shaped jig is attached to the cutter body, the tip of the throw-away tip can be brought into contact with the reference surface for setting the jig to align the positions of the front cutting edges. In addition, the position of the throw-away tip in the cutter radial direction can be determined by hitting the tip with the attachment reference seat provided on the cutter body, and since the attachment reference seat has substantially two sides, the body has 2 Similar to a cutter that has a surface mounting reference seat, it enables tip replacement and blade runout adjustment on the machine. Further, with this structure, since the through groove can be easily processed, it is possible to provide the cutter which is easy to manufacture the body and is inexpensive.

A conventional cutter having two mounting reference seats adjusts the blade runout based on the seat, so that the dimensional accuracy of the throw-away tip affects the blade runout accuracy. On the other hand, the cutter of the present invention using a jig adjusts the blade edge reference, so that even if there is a processing error in the tip, the front cutting edge is accurately aligned on the same plane.

Further, according to the structure of claim 2 in which the head of the bolt is used as the position reference in the axial direction of the cutter, the seat-based positioning can be performed just by providing the bolt as in the case of the cutter having the bag groove. The number of processing points is reduced, and further cost reduction can be achieved.

2. A method according to claim 1, wherein the screwing direction of the bolt is limited.
According to the configuration of 0, the bolt head (that is, the axial position reference) is displaced in the longitudinal direction of the through groove by the rotation of the bolt,
Therefore, it is possible to finely adjust the position of the cutting edge, and it is possible to expect more precise adjustment of the blade runout.

Further, a jig and a bolt are used together.
According to the configuration, either of them can be selectively used.
Further, it is possible to set the initial position of the bolt by a method of screwing the bolt to a position where the head of the bolt hits the tip which is positioned with the jig as the reference of the cutting edge, which is more convenient.

In addition, the structure according to the eleventh aspect in which the loosening prevention means is added to the bolt eliminates the loosening of the bolt due to the vibration during cutting and the centrifugal force, and is effective in maintaining the accuracy of the blade runout adjustment.

[0016]

FIG. 1 shows an embodiment of the cutter of the present invention.
As shown in (a) and (b) of the same drawing, a through groove having a bottom surface as a mounting reference seat 3 for the chip and one side surface as a support seat 4 is provided on the outer periphery of the tip of the cutter body 2 from the center side of the body. It is cut out diagonally upward toward the surface. The throw-away tip 5 has one side attached to the mounting reference seat 3 as shown in FIG. 1 (a), and the support seat 4 as shown in FIG. 1 (b).
And the wedge type presser foot 7 which is tightened by the clamp screw 6.

The cutter body 2 is provided with a mounting cylinder portion 9 concentric with the shaft center of the cutter 1 around the center hole 8, and further, a position reference plane perpendicular to the cutter shaft center around the mounting cylinder portion. 10 is provided. The position reference surface 10 is an annular surface concentric with the axis of the cutter. Further, a female screw 11 is cut on the mounting cylindrical portion 9. This female screw 11 is shown in FIG.
As shown in (c), it is cut out in a petal shape at a predetermined pitch in the circumferential direction.

Reference numeral 13 in FIG. 1A is a disc-shaped jig attached to the cutter. The jig 13 has a boss portion 14 screwed into the mounting cylindrical portion 9, a flat surface 17 in close contact with the position reference surface 10, and a chip set reference surface 18.

The male screw 15 on the outer periphery of the boss portion 14 to be screwed into the female screw 11 also corresponds to the cutout portion of the female screw, as shown in FIG.
As shown in (d), it is cut out like a petal.

The notch 12 of the female screw 11 is larger than the non-notched portion of the male screw 15, and the notch 16 of the male screw is also larger than the non-notched portion of the female screw 11. Therefore, when the jig 13 is attached to the cutter body, the boss portion 14 is inserted into the attachment cylindrical portion 9 at a position where the notched portion and the non-notched portion of the screws correspond to each other, and then the jig is slightly moved ( This can be easily performed by two operations (this can be done with one hand) in which the screws 11 and 15 are engaged by being rotated by several tens of degrees. Of course, the removal in the reverse procedure is also easy.

The plane 17 and the set reference plane 18 are annular planes concentric with the axis of the cutter, and the plane 17 is the position reference plane 1.
The front cutting edge of the throw-away tip 5 is brought into contact with the set reference plane 18 at a position in contact with 0, and one side of the tip is brought into contact with the attachment reference seat 3 to clamp the presser foot 7.
Since the set reference surface 18 receives the throw-away tip 5 from below at a fixed position, positioning by pressing the tip can be easily and accurately performed.

The male and female screws 11 and 1 of the cutter shown in FIG.
5 may be a screw without a notch. Further, the jig attaching means is not limited to the male and female screws. For example, as shown in FIG. 2, a lock bolt 19 that can be operated from the outside can be incorporated into the cutter body 2, and the jig 13 can be fixed to the cutter body with this bolt. In the side lock system shown in the figure, when the boss portion 14 is provided with a tapered surface 20 that is inclined in the direction of narrowing the root and the tip of the bolt 19 is pressed against this tapered surface, the component force generated at the engagement portion between the bolt and the tapered surface is obtained. As a result, the flat surface 17 comes into close contact with the position reference surface 10 and it is easy to ensure the positional accuracy of the set reference surface 18.

3 to 6 show still another example of the jig mounting means. This attachment means may be a latch 21 shown in FIG. 3 or a screw 22 rotatably fitted in the center of the jig as shown in FIG. 4 or integrally provided and screwed into the center of the cutter body 2.

As shown in FIG. 5, the position reference plane 1
It is also possible to form either the 0 or the flat surface 17 with the permanent magnet 23 and to make the other surface as a magnetic body to be attracted by magnetic force, or the one shown in FIG.

The mounting means shown in FIG. 6 is used for the boss portion 14 of the jig 13.
The small ball 24 that can be freely retracted and retracted, the operating screw 25, and the large ball 26 that transmits the thrust of this screw to the small ball 24 are incorporated, and the small ball 2 that is pushed out obliquely by the operation of the operating screw 25
4 is pressed against the circular arc groove 27 provided on the inner surface of the mounting cylindrical portion, and is fixed in a state where an axial pulling force is generated.

1A and 2C are arbors mounted on the main shaft (not shown) of the processing machine, and D is a cutter mounting bolt for the arbor. As can be seen from the above, the illustrated cutter 1 can be simply attached / detached without removing it from the processing machine to easily perform the conversion of the throw-away tip and the adjustment of the runout on the basis of the cutting edge on the machine.

Even when the chips are exchanged outside the machine, the cutter 5 and the jig 13 can be oriented as shown in the figure so that the chips 5 can be supported by the jig reference plane 18, so that the same as when the machine is onboard. Work can be simplified and speeded up.

8 to 10 are specific examples of the cutter according to the second embodiment of the present invention.

In this cutter 1 as well, the cutter body 2 is provided with the same through groove as described above. A flat surface 28 that intersects the support seat 4 at an obtuse angle is formed on the cut-out end side of the through groove to the outer peripheral surface of the body, and a screw hole 29 is opened in this flat surface portion, and a bolt 30 is screwed therein.

The bolt 30 has a head having a circular cross section, and the head enters into the through groove to restrain the side surface of the throw-away tip 5 located on the rear side of the cutter. Therefore, the blade runout adjustment can be performed even on the machine with the head as a position reference in the cutter axial direction and the mounting reference seat 3 as a position reference in the cutter radial direction.

The screwing direction of the bolt 30 is not limited to be parallel to the through groove, but when it is diagonally intersecting with the through groove as shown in the figure, the removal amount of the cutter body when the flat surface 28 is attached is reduced. It does not need to be large, and the head diameter of the bolt does not have to be too large. Further, the bolt 30 can change the head position in the longitudinal direction of the through groove by adjusting the screwing amount, and fine adjustment of the axial position reference by this can further improve the blade runout accuracy. When it is slanted as shown in the figure, the amount of displacement of the head in the longitudinal direction of the through groove is reduced at a constant rate with respect to the amount of screwing in of the bolt, so more precise fine adjustment can be performed.

When finely adjusting the blade runout by rotating the bolt 30 as described above, it is not preferable that the bolt loosens or comes off due to vibration during cutting. Therefore,
It is recommended to add a loosening prevention measure as shown in FIGS. 11 to 13.

In FIG. 11, the screw portion 31 of the bolt 30 is longitudinally divided by providing an axial slit 32 (in the figure, it is a cross-shaped slit), and the longitudinally divided portion is expanded to expand the diameter. When the expanded diameter screw portion 31 is screwed into the screw hole 29, the screw portion 31 elastically deforms and contracts in diameter, and the elastic restoring force presses against the hole surface to increase rotational resistance and prevent loosening.

12 and 13 show an example in which a filler for suppressing the diameter reduction of the screw portion 31 having the enlarged diameter is added to the bolt of FIG.

The screw portion 3 having the slit 32 and having an enlarged diameter
In No. 1, since a compressive force is constantly applied from the surroundings, a diameter reduction due to fatigue occurs. Further, the diameter may be reduced due to the centrifugal force during cutting, and the pressing pressure against the hole surface may be weakened.

In FIG. 12, as a measure for preventing the problem, a soft resin such as nylon is provided in the screw part 31 with a lateral hole 33 for widening a part of the slit 32, and the lateral hole holds the expanded state of the screw part 31. 35 is fitted.

The hole for widening the slit 32 may be a vertical hole 34 as shown in FIG. Further, the diameter reduction preventing filler that fits into the lateral holes 33 and the vertical holes 34 may be the spring pin 36 shown in FIG.

The cutter of the first form and the cutter of the second form configured as described above are, for example, 8 mm with a processing diameter of 160 mm.
When the blade runout was adjusted for the single-blade type,
The error can be set within 0.03 mm by using the jig 13 described above or by adjusting the screwing amount of the bolt 30 shown in FIG. 12, and the time required for incorporating eight blades is about 2 minutes.

Further, the jig 13 and the bolt 3 shown in FIG.
As a result of using 0, the cutting speed was 150 m / min and the depth of cut was 3.
The surface roughness of 3 μm can be achieved by cutting the work material (S50C) with a cermet blade under the conditions of mm, feed 0.1 mm / blade, and the life of the chip is about twice as long as before.

If the jig 13 and the bolt 30 described above are provided side by side and either one of them is selectively used, both the cutting edge reference and the seat reference can be adjusted. It is also possible to set the initial position of the bolt by a method in which the head of the bolt is applied to the chip positioned by the jig.

[0041]

As described above, the cutter of the present invention is provided with a detachable jig, and the tip of the tip of the jig is used to accurately determine the axial position of the cutter on the position reference plane of the cutter body. Since the set reference surface is provided and the throw away tip is positioned by two of the set reference surface and the attachment reference seat provided on the cutter body, tip replacement on the machine and blade runout adjustment based on the cutting edge are possible. Thus, it is possible to reduce the time required for attaching and detaching the cutter, speed up the chip replacement, and increase the operating rate of the processing machine.

A similar effect can be obtained by providing a bolt on the rear side of the through groove and using the head of the bolt as the axial position reference of the cutting blade.

Further, the cutter of the present invention can reduce the cost because the processing of the through groove is simple, the blade deflection adjusting mechanism is simple, and the number of parts is small.

[Brief description of drawings]

1A is a cross-sectional view showing an example of a cutter of the present invention, FIG. 1B is a partial side view of the same cutter as above, FIG. 1C is a front view of a mounting cylindrical portion, and FIG. 1D is a plan view of a jig.

FIG. 2 is a sectional view showing a part of another embodiment.

FIG. 3 is a cross-sectional view showing a part of another embodiment.

FIG. 4 is a partially cutaway front view showing still another embodiment.

FIG. 5 is a partial cross-sectional view showing still another example.

FIG. 6 is a partial cross-sectional view showing still another example.

FIG. 7 is a perspective view showing a blade runout adjustment of a conventional cutter.

FIG. 8 is a side view showing a partially cutaway example of the cutter according to the second embodiment of the present invention.

FIG. 9 is a front view showing a part of the above cutter.

FIG. 10 is a sectional view showing the basic structure of the above cutter.

FIG. 11 is a partially cutaway side view showing an example of a blade runout adjusting bolt.

12 is a side view of the bolt of FIG. 11 with a lateral hole and a filler (spring pin) added.

13 is a side view showing a state in which a vertical hole and a filler (spring pin) are added to the bolt of FIG.

[Explanation of symbols]

 1 cutter 2 cutter body 3 mounting reference seat 4 support seat 5 throw-away tip 6 clamp screw 7 wedge type presser foot 8 center hole 9 mounting cylindrical portion 10 position reference surface 11 female screw 12, 16 notch portion 13 jig 14 boss portion 15 Male screw 17 Flat surface 18 Set reference surface 19 Lock bolt 20 Tapered surface 21 Latch 22 Screw 23 Permanent magnet 24 Small ball 25 Operation screw 26 Large ball 27 Arc groove 28 Flat surface 29 Screw hole 30 Bolt 31 Screw part 32 Slit 33 Horizontal hole 34 Vertical hole 35 Soft Resin 36 Spring Pin

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsutoshi Yamane 1-1-1 Kunyokita, Itami City Sumitomo Electric Industries Itami Works Co., Ltd.

Claims (13)

[Claims] 1. A through-groove having a groove base as a mounting reference seat and one side surface as a support seat is formed in the outer peripheral portion of the cutter body by cutting from the front surface of the body to the outer peripheral surface, and a throw-away tip is provided in the through-groove. One side of the tip as the mounting reference seat,
In a throw-away type cutter in which one end face is inserted along each of the support seats and sandwiched between the support seat and the wedge-type presser foot and held, an annular shape perpendicular to the center axis of the cutter is provided near the center of the front surface of the cutter body. Is provided with a position reference surface of, and a disc-shaped jig having a plane to be brought into close contact with the position reference surface and a set reference surface of a chip parallel to this plane, and a jig body for the jig. Attaching attachment means, attaching the jig to the cutter body when the throw-away tip is attached,
A throw-away type cutter characterized in that a throw-away tip is pressed against the set reference surface of this jig to align the front cutting edge. 2. A through groove having a groove base as a mounting reference seat and one side surface as a support seat is formed in the outer peripheral portion of the cutter body by cutting out from the front surface of the body to the outer peripheral surface, and a throw-away tip is provided in the through groove. One side of the tip as the mounting reference seat,
In a throw-away type cutter in which one end face is inserted along each of the support seats and sandwiched between the support seat and the wedge type presser foot and held, a bolt is attached to the cutout end side of the through groove to the outer periphery of the cutter body. Provided and screwed into and supported by the cutter body, project the head with a circular cross section of the bolt into the through-groove, and use this head as the reference for the axial position of the throw-away tip in the cutter axial direction. A throw-away type cutter characterized by positioning. 3. A throw-away type cutter according to claim 1, wherein the bolt according to claim 2 is used in combination. 4. The cutter body is provided with a mounting cylinder portion and a boss portion corresponding to a jig, and male and female screws are provided correspondingly to the both, and the jig is used as the mounting means in the cutter body. The throw-away cutter according to claim 1 or 3, which is adapted to be attached. 5. The thread portions of the male and female screws are notched at several places at predetermined intervals in the circumferential direction, and the notches are made larger than the non-notched portions of the mating screws to form the non-notched portions. The throw-away cutter according to claim 4, which is provided at a corresponding position. 6. The cutter body is provided with a bolt that can be operated from the outside, and the jig is attached to the cutter body by using the bolt that engages the jig so as to generate a pulling force. The throw-away type cutter described in 3. 7. The throw-away cutter according to claim 1, wherein a latch is provided between the mounting cylindrical portion and the boss portion instead of the male and female screws according to claim 4, and the latch serves as the mounting means. 8. The position reference surface and one of the flat surfaces of a jig that is in close contact with this surface are made of permanent magnets, and the other is a magnetic body that attracts to the magnets, and this serves as the attachment means. The throw-away type cutter according to 1 or 3. 9. Instead of the male and female screws according to claim 4, the jig is provided with a ball protruding and retracted on the outer periphery of the boss and a pushing means for the ball, and the ball is engaged on the inner surface of the mounting cylindrical part. The throw-away type cutter according to claim 1 or 3, wherein arcuate grooves for stopping are provided and these are used as the attachment means. 10. The screwing direction of the bolt is parallel to the through groove or diagonally intersects with the through groove, and the bolt is attached so that the screwing amount can be adjusted.
The throw-away type cutter described. 11. The throw-away type cutter according to claim 2, 3 or 10, wherein loosening prevention means for the bolt is added. 12. A bolt screw part is longitudinally divided by an axial slit provided to expand the diameter, and the expanded screw part is tightly screwed into a screw hole provided in the cutter body to form the loosening prevention means. The throw-away cutter according to claim 11. 13. A bolt thread portion is provided with a lateral hole or a vertical hole for widening a part of the slit, and a fitting material for suppressing the diameter reduction of the screw portion having appropriate elasticity is fitted into the hole.
The throw-away type cutter described in 2.