JPS58120413A - Cutting method by means of throwaway type cutter and available throwaway type cutter therein - Google Patents

Abstract

PURPOSE:To facilitate tooling control, by making a sequare cutter tip and an oblong cutter tip selectively attachable to one tool body. CONSTITUTION:A tool body 21 has a setting part 22 on its one end and also plural cutter tip mounting grooves 23 on its other end peripheral part, in which an oblongish cutter tip 24 or a sequarish cutter tip built in according to application purposes while clamping of each cutter tip 24 takes place by means of a wedge member 25. A mounting wall surface 31a of this wedge member 25 is formed up beneath the opposite side of a rake face 30 of the cutter tip 24, and likewise a screw for clamp use is installed on a radial underside 32 along the wall surface 31a and thereby the wedge member is clamped tightly.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a cutting method using a second throw-away cutter and a throw-away type cutter used therefor.

Here, the problem is a slow-aqueous second cutter in which a plurality of cutting tips are attached along the circumferential direction to the outer periphery of the tip of the tool body. There are various types of cutters of this kind, such as face milling cutters, polling cutters, and side cutters, and the present invention can be widely applied to them. However, for convenience of explanation, the following discussion will focus on the face milling cutter. The cutting edge tip used here is a square-shaped slow-quay tip with a secondary cutting edge at each corner, but K is a square-shaped cutting edge tip with the same edges on each side. , and also include rectangular and parallelogram cutting edges as those in which the lengths of the edges of each intersecting side are different.

Conventionally, in this type of cutter, there has always been a one-to-one correspondence between the tool body and the cutting tip, such as a specific tool body being attached to a specific cutting tip. It had been taken.

In the case of a conventional face mill, as shown in Figs. 1 and 2, the dish-shaped tool body IK has a part 2 at one end in the axial direction for attachment to the spindle of a machine tool, and a part 2 at the other end on the outer periphery. Each has a plurality of cutting blade chip mounting portions 3 along the circumferential direction. Then, each rectangular cutting tip 4 is set to each cutting tip mounting portion 3 of the tool main body 1, or in this setting, the mounting is performed from the portion 2 to the front side secondary cut. While determining the height up to the blade 6, it is important to correctly position each cutting edge tip 4 in relation to the run-out accuracy between the auxiliary cutting edges 6.

From the viewpoint of positioning the cutting tip 4, when looking at the conventional examples shown in FIGS. 1 and 2, in the one shown in FIG. 6
The cutting is performed using the ridges on the opposite sides of the two pieces forming the cutting edge, and it is said that variations in the inscribed circle will cause run-out of the front side sub-cutting edge 6 and poor assembly height accuracy. The problem is undeniable. In this regard, in the case of the one shown in FIG.
Since the cutting blade tips 4 are directly abutted against each other, the positioning accuracy can be achieved regardless of the shape accuracy of the cutting blade tip 4. However, on the other hand, there is a risk of damaging the auxiliary cutting edge 6, and it is difficult to set the cutting edge on the rounding machine, which requires a setting jig 9, and furthermore, setting 40 cutting edge chips is troublesome. .

By the way, in the case of the one shown in FIG. 2, the cutting blade tip mounting section 3 is also open to the outer side of the tool body 1, and therefore a rectangular tip 11 as shown by the chain line is set there. It is also possible to do so.

So, after considering this point, we found that each cutting edge tip 4
When tightening is performed using the wedge member 5 as shown in Fig. 3, the tightening is strong, so it is possible to realize the above idea of interchangeability of cutting blade tips! 11 Akashiyoshi. Note that when tightening the cutting tip using the wedge member 5, even if the cutting tip is reground, unlike the pin clamp method where you have to be careful about the hole position where the bottle is passed, there is no possibility of damage to the clamp. There is no possibility that this will occur.

This invention was made in consideration of the above points, and it realizes the simple idea of attaching cutting chips of different sizes to one tool body depending on the depth of cut. At the same time, it also provides a slow aquay cutter that goes well with that.

Hereinafter, the content of Jin's invention will be clarified with reference to the attached FIGS. 4 to 17.

In the cutting method according to the present invention, a cutting edge chip such as a square chip having the same edge length and a cutting edge chip such as a rectangular chip having different edge lengths that intersect with each other are The basic feature is that it can be attached to the tool body in a uniform manner to perform cutting. Further, in connection with this, the present invention adopts a method of using a wedge member as a means for tightening the cutting blade chips, and the tool body used has one edge forming the main cutting edge ridge on each cutting blade chip mounting portion. Among the valley ridges that have a positioning base surface that supports the side surface of the cutting edge tip on the side opposite to the main cutting edge 11IVc and intersect with the main cutting edge 11IVc, the one that is twisted from the auxiliary cutting edge that forms at least the finished surface. The edge of one side is open.

The cutter according to the illustrated embodiment of the present invention has two base surfaces for positioning the cutting blade tip, namely, a base surface supporting the side surface of the cutting blade tip on the side opposite to one side edge forming the main cutting edge edge;
Among the side twill portions that intersect with the main cutting edge edge, there are two base surfaces that support the side surface of the cutting edge tip that is close to the minor cutting edge that forms the finished surface. From the point of view of interchangeably attaching cutting edges with different shapes or sizes, such as square tips and rectangular tips, to the same tool body, the cutting edge on the side closer to the minor cutting edge that forms the finished surface. A base surface supporting the side surface of the chip is not necessarily required. However, like the cutter in the illustrated embodiment,
If the base surface is also provided, it is possible to obtain the advantage that the problem that arises due to the use of a setting jig in the above-mentioned one shown in FIG. 2 can also be obtained.

Next, this invention will be explained more specifically by giving examples of the invention.

In FIGS. 4 to 7 showing an embodiment of the present invention, a tool body 21 has a portion 22 at one end for attachment to a spindle of a machine tool, and a plurality of cutting blade tips are mounted on the outer periphery of the other end. Has @23. And each of these cutting blade chip mounting grooves 2
A rectangular cutting tip 24 is installed in the recess 3 and fastened by a wedge member 25 and a clamp screw 26.

The cutting blade chip mounting groove 23 includes a radial positioning base surface 27 of the cutting blade chip 24 , a base surface 29 of a convex portion 28 located on the lower front side along the base surface 27 , and a base surface 29 of the protrusion 28 located on the lower front side along the base surface 27 .
It consists of a rake face 30 side wall [31], and two outer peripheral side portions of the tool body 21 are open. 1&, cutting blade tip 2
4 is fastened using the wedge member 2s, or the wall surface 31m on which the wedge member 250 is placed is provided below the opposite side of the rake surface 300 of the cutting blade tip 24, and one surface 31
A threaded hole for a clamp screw is provided in the radial lower surface 32 along Jl. Furthermore, the tool body 21 has a first pocket 33 cut out smoothly in the front side of one surface 31 of the cutting edge 24 on the side of the rake face 30, and a first pocket 33 that is smoothly cut out in front of the surface 31 of the cutting edge 24 on the side of the rake face 30; Surface wall surface 31
A second pocket 35 is provided.

Of these two pockets 33, 35, the second pocket 35 also serves as a corner escape for the cutting tip 24.

Note that the cutting edge tip 24 itself attached to the tool body 21 is a known one, and is a rectangular flat plate consisting of two short side edges 36 and two long side edges 37, as shown in FIGS. 12 to 14. , a secondary cutting edge 34 is formed at the corner formed by the short side edge 36 and the long side edge 37, and one of the long side edges 3) is used as the main cutting edge (Japanese Utility Model Publication No. 52-540715) reference).

On the other hand, in the embodiments shown in FIGS. 8 to 11, the same tool body 21
In contrast, the case where a flat square chip 38 is attached is shown. In this case, the procedure for tightening the tip shall be as described above. Note that the cutting blade tip contact surface 3 of the wedge member 25
If the relief groove 40 is provided in the cutting edge 9, it is convenient to prevent the chips attached to the cutting edge 38-1 from welding.

The cutting edge tag 38 itself is a square flat chip having the same length as the short side edges 36 of the rectangular flat chip 24, as shown in FIGS. A main cutting edge 41 is used, and a floor plan provided at each corner is used as a minor cutting edge 42.

In addition, in the illustrated example, the convex portion 2 constituting the base surface 29
8 is formed integrally with the tool body 21, but the protruding portion 28 may be formed separately from the tool body 21. The inner body of the convex portion 28 is only used for positioning, and since the cutting load is hardly applied to it, it can be constructed by, for example, a built-in bottle holder. Therefore, it is easy to make the convex portion 28 separate, and doing so is extremely advantageous in terms of machining the tool body 21. 1. In addition, the cutting edges used in this invention include not only those with a negative radial rake angle α and positive axial rake angle α, but also those with both αl and αm positive, as well as those with a negative radial rake angle α and a positive axial rake angle α. There is a case where both numbers are negative: fi. Furthermore, Il[? It goes without saying that the description given above will focus on the II blade, but it can also be applied to the so-called nose-round type.

As mentioned above, this development is a basic young fruit that allows cutting to be performed by attaching cutting tips of different sizes to one tool body depending on the depth of cut. In connection with this, tool management becomes easier, and the following various effects can also be obtained due to the structure of the cutter. Firstly, because the support base for positioning the cutting edge tip is placed close to the auxiliary cutting edge used, the inscribed circle tolerance of the cutting edge tip can be ignored and the runout is high. Second, since the cutting tip is provided either on the support base of the cutting edge or inside the cutter, the cutting tip can be easily replaced on the machine. The effect of the pocket is that chips generated at the sub-cutting edge are smoothly discharged.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the state of positioning of the cutting blade tip of a conventional slow-aquay two cutter, Fig. 2E is a sectional view showing another conventional example, and Fig. 3 shows the clamping state of the cutting blade tip in these conventional examples. 4 is a sectional view showing one embodiment of the present invention, FIG. 5 is a partial normal view of the one in FIG. 4, FIG. 6 is a view taken in the direction of arrow P in FIG. 4, and FIG. is a view taken in the Q direction of Fig. 4, Fig. 8 is a cross-sectional view similar to Fig. 4 showing the cutter of the present invention with another flat square cutting tip attached, and Fig. 9 is a sectional view as shown in Fig. 8. Partial front view of the object, No. 10
11 is a view taken in the Q direction of FIG. 8, FIG. 12 is a plan view of a rectangular flat chip that is attached to the cutter of the present invention, and FIG. 13 is a view taken in the direction P of FIG. 8. Fig. 14 is a front view of the one shown in Fig. 12, Fig. 15 is a plan view of a square plate chip attached to the cutter of the present invention, and Fig. 16 is a right side view of the one shown in Fig. 15. The plan view, FIG. 17, is a front view of the one shown in FIG. 15. 1 21... Tool body, 2, 22... Mounting part, 3, 23... Cutting blade tip placement part (cutting blade tip placement @), 4.24. 38... Cutting blade tip,
525... Wedge member, 27.29... Base surface, 28... Convex portion, 6, 34.42...
Minor cutting edge. Applicant=Kai Kinzoku Co., Ltd. 7C

Claims (1)

[Scope of Claims] 1i111 A tool body having a heating part for a spindle of a machine tool at one end in the center direction, and a plurality of cutting blade tip placement parts along the circumferential direction on the outer periphery of the other end, In the method of performing cutting by attaching a rectangular slow-aqua tip with all edges at the valley corners, each cutting edge tip mounting section has a side edge opposite to one edge forming the main cutting edge edge. Cutting tip I! 1lWJ has a base surface that supports the WJ, each cutting edge tip is positioned by the base surface, and among the ☆ edge edges that intersect with the main cutting edge edge, at least from the minor cutting edge forming the finished surface. The ridge of one side of the remote side is left open, and the ☆cutting blade tip is fastened using a wedge member. A cutting method using a second indexable cutter, which is characterized in that cutting is performed by attaching cutting tips with different intersecting valley edge lengths in a compatible manner. i The tool body has a section at one end in the axial direction for attachment to the spindle of a machine tool, a tool body with a plurality of cutting blade chip placement sections along the circumferential direction on the outer periphery at the other end, and a subcutting section at the root corner. In the throw-away second cutter, which has a blade and a square-shaped throw-a-quay tip attached to the cutting blade chip mounting part (using a wedge member), each cutting blade chip mounting part has a main The base surface that supports the side of the cutting blade tip, which is opposite to the one side ridge forming the cutting edge ridge, intersects with the main cutting edge ☆
Among the edge portions, one side edge that has a base surface that supports the side surface of the cutting edge tip near the minor cutting edge that forms the finished surface, and is further away from the minor cutting edge that forms the finished surface. A throw-away cutter with an open part.