JPH0613772Y2 - Throwaway cutter - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a throwaway type cutter equipped with a wiper blade tip, and in particular, a technique for improving the positioning accuracy of the wiper blade tip and improving seating stability. It is about.

[Prior Art] With a cutting tool equipped with multiple throwaway inserts (hereinafter referred to as face milling cutters and inserts, respectively) such as throwaway type face milling cutters, etc. There is a method in which roughing and finishing are performed in a single cutting process. In such a face milling machine, the bottom blade of the flat-blade tip is projected to the front side, for example, 0.06 mm with respect to the bottom blade of a normal tip, and the roughened surface of the tip is finished with the flat-blade tip. There is.

By the way, the conventional face milling cutter is configured such that a plurality of chip mounting seats are formed on the outer peripheral portion of the tip of the tool body, and the chips are placed on the chip mounting seats and clamped and fixed by wedge members and clamp bolts. All seats were formed with common manufacturing tolerances.

[Problems to be Solved by the Invention] However, in the face milling machine as described above, extremely high dimensional accuracy is required for the positioning of the flat blade insert for finishing, as compared with a normal insert. Therefore, conventionally, with the front milling cutter attached to the milling machine, the runout of the bottom edge of the flat blade is measured using a dial gauge or the like, and the position of the flat blade tip is finely adjusted. . However, with such adjustment, high positioning accuracy cannot be expected, and not only the cutting edge of the wiper blade will be worn early and the processing accuracy will be deteriorated, but also skillful and long time is required for the setup of the face milling cutter. Also, when using a flat blade with a long bottom blade, the flat blade tip largely protrudes from the sheet member, and the seating stability of the flat blade tip deteriorates.For this reason, so-called chatter vibration easily occurs It was a cause of chipping and roughening of the processed surface.

[Object of the Invention] The present invention has been made in view of the above circumstances, and it is of course possible to position the sweeping blade tip with high accuracy and easily, and to improve the seating stability of the sweeping blade tip. The purpose is to provide a throwaway cutter that can be used.

[Means for Solving the Problems] The throwaway type cutter of the present invention is
Providing an instruction means for specifying the tip mounting seat to which the wiper blade tip is to be mounted, the dimensional accuracy of the tip mounting seat specified by this instruction means is within 0.01 mm in the axial direction, and the wiper blade tip is mounted. At least the tip side portion of the seat member to be placed is formed in substantially the same shape as the flat blade tip so that the upper surface thereof can contact almost the entire tip of the seating surface of the flat blade tip, and the seat member The chip mounting seat to be placed is formed in substantially the same shape as the seat member so that the upper surface thereof can contact almost the entire lower surface of the seat member.

[Operation] Generally, the positioning accuracy of the bottom blade of the flat blade tip is within 0.036 mm in the axial direction. On the other hand, the manufacturing tolerance of the flat blade tip is within 0.026 mm at the bottom blade. Here, in the throwaway type cutter with the above configuration, some of the tip mounting seats have a dimensional accuracy of 0.01 mm or less in the axial direction. Is 0.0
36. Therefore, the position of the bottom blade can be determined with a predetermined dimensional accuracy only by mounting the wiper blade tip on the tip mounting seat specified by the indicating means without fine adjustment of the wiper blade tip.

Further, by contacting almost the entire tip of the seating surface of the wiper blade tip with at least the tip end side portion of the sheet member on which the wiper blade tip is placed, the tip mounting seat is brought into contact with almost the entire lower surface of the sheet member. Since the cutting resistance that acts on the flat blade tip is supported by the sheet member and the resistance that acts on the sheet member is supported by the tip mounting seat, the seating stability of the flat blade tip is improved.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 11. FIG. 1 is a bottom view showing the front milling cutter of the embodiment.

In FIG. 1, reference numeral 1 is a tool body. The tool main body 1 has a disk-like shape that can be rotated about the axis O, and a plurality of concave chip pockets 2 are formed at regular intervals on the outer peripheral portion of the tip. On the wall portion of the chip pocket 2 facing the rotation direction, a chip mounting seat 3 is formed by cutting out in a rectangular shape. Of the chip mounting seats 3, ..., Four of which are spaced 90 ° around the axis have a dimensional accuracy of 0.01 mm or less in the axial direction. These four tip mounting seats 3a are used for mounting a flat blade tip, and a circular mark (indicating means) A is provided close to the tip mounting seat 3a on the end surface of the tool body 1 in order to identify them. Then embedded. The dimensional accuracy of the other chip mounting seats 3 in the axial direction is 0.025 which is a general accuracy.
It is within mm.

As shown in FIGS. 3 and 4, the seat member 4 is attached to the chip mounting seats 3 by a set screw 5. As shown in FIG. 6, the sheet member 4 has a substantially trapezoidal shape in a plan view, and one ridge line portion on the upper surface is arranged so as to be orthogonal to the axis O. Here, the tip mounting seat 3 ...
Are formed in substantially the same shape as the sheet member 4. This tip mounting seat 3 is a conventional tip mounting seat 3 shown in FIG.
Compared with the above, the tool body 1 is further extended to the tip surface 1a side, and as shown in FIGS. 8 to 10, the sheet member 4 contacts the entire lower surface thereof so as not to overhang. Has become. A chip 6 is placed on the upper surface of the sheet member 4, and is removably fixed by a wedge member 8 that is tightened by a clamp screw 7 into a recess 2a formed in the bottom surface of the chip pocket 2.

The tip 6 has a quadrangular plate shape as shown in FIG. 5, and a predetermined range of each ridge line on the upper surface from each corner in the counterclockwise direction is defined as a main cutting edge 6a.
A range shorter than the main cutting edge 6a inclined inward of the tip 6 with respect to a is the bottom blade 6b. Also, the bottom blades 6b and 6
The dimensional tolerance between b is 0.026 mm.
The tip 6 is arranged such that the main cutting edge 6a faces the outer peripheral side and the bottom blade 6b is orthogonal to the axis O.

On the other hand, a flat blade tip 9 is attached to the flat blade tip mounting seat 3 a via the sheet member 4. As shown in FIG. 5, the wiper blade tip 9 has a bottom blade 9a formed over substantially the entire length of one ridge line portion, and is formed in substantially the same shape as the sheet member 4. This wiper blade tip 9
Is arranged such that the bottom blade 9a is orthogonal to the axis and projects a predetermined dimension T toward the tip side with respect to the bottom blade 6b of the tip 6. Here, the predetermined dimension T is set in the range of 0.01 mm to 0.1 mm, and generally 0.06 mm is preferably used.

In the face milling machine having the above configuration, the dimensional accuracy of the tip mounting seat 3a for the wiper blade is within 0.01 mm in the axial direction, so that the manufacturing tolerance of the tip mounting seat 3a is 0.026.
When the flat blade tip 9 that is within mm is installed, the cumulative error is within 0.036 mm, and the bottom blade 9a of the flat blade tip 9
Positioning accuracy is within 0.036 mm. Therefore, the position of the bottom blade 9a can be determined with a predetermined dimensional accuracy simply by mounting the wiper blade tip 9 on the tip mounting seat 3a specified by the mark A. Therefore, the conventional position adjustment of the wiper blade tip 9 can be performed. Face milling can be set up quickly and easily without any need. Further, since the position of the sweeping blade tip 9 can be performed with high accuracy, the life of the sweeping blade tip 9 can be extended and the processing accuracy can be improved. Further, since only the tip mounting seat 3a for the wiper blade is formed with high dimensional accuracy, the manufacturing cost can be reduced.

Further, the entire seating surface of the flat blade tip 9 is brought into contact with the seat member 4, and the entire lower surface of the seat member 4 is also attached to the chip mounting seat 3a.
Since the sheet member 4 is brought into contact with the sheet member 4, the cutting resistance that acts on the flat blade tip 9 is supported by the sheet member 4.
The resistance acting on is supported by the chip mounting seat 3a.
Therefore, even with the flat blade tip 9 having the long bottom blade 9a as described above, the seating stability is improved, and since the flat blade 9 can be used stably, the finishing surface accuracy can be improved. Can be improved.

In the above embodiment, the mark A is provided on the tip surface of the tool body 1 as so-called instruction means. However, for example, a sheet member attached to the tip mounting seat 3 of a normal tip is first
The configuration is arbitrary, such as the conventional sheet member 10 shown in FIG. 1 or the shape of the tip pocket for the wiper blade different from other shapes. Further, the present invention is not limited to the above face milling cutter, but in addition,
Similar effects can be obtained as long as end mills, horizontal milling cutters, and the like that use blade tips.

[Effect of Invention] As described above, the throwaway cutter of this invention.
-The tip that should be attached to the tool body
An instruction means for specifying the mounting seat is provided, and this instruction means
Dimensional accuracy of the chip mounting seat specified by
Within 0.01 mm, and with a flat blade tip
At least the tip side of the sheet member
Touches almost the entire tip of the seating surface
It is formed in almost the same shape as the flat blade tip so that
The chip mounting seat on which this sheet member is placed,
So that the upper surface can contact almost the entire lower surface of the sheet member
Since it is formed in almost the same shape as the seat member,
Cutting blade tip to tip mounting seat identified by means
Simply attach the to position the bottom blade with the specified dimensional accuracy.
It Therefore, the position of the cutting edge
Quick and easy setup without any alignment
It can be carried out. Also, the positioning of the flat blade tip
Since it can be performed with high accuracy, the life of the flat blade
It is possible to extend the life and improve the processing accuracy.
And improve the seating stability of the flat blade tip
be able to. Furthermore, only the tip mounting seat for the flat blade
Since it is formed with high dimensional accuracy, manufacturing cost is reduced.
It is possible to obtain effects such as being cheaper.

[Brief description of drawings]

1 to 10 are views showing an embodiment of the present invention, wherein FIG. 1 is a bottom view showing a front milling cutter, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. Fig. 4 is a view in the direction of arrow III in Fig. 2, Fig. 4 is a view in the direction of arrow IV in Fig. 3, Fig. 5 is a side sectional view showing a state in which a tip and a cutting blade tip are mounted, and Fig. 6 is a sheet. FIG. 7 is a side sectional view showing a state in which a tip is mounted on the upper surface of a member, FIG. 7 is a side sectional view showing a state in which a flat blade tip is mounted on the upper surface of a sheet member, and FIG.
-VIII line sectional view, FIG. 9 is the IX direction arrow view of FIG. 6, 1st
FIG. 0 is a view taken in the direction of the arrow X in FIG. 6, and FIG. 11 is a side sectional view showing a conventional chip mounting seat. 1 ... Tool body, 3, 3a ... Tip mounting seat, 4 ... Sheet member, 6 ... Tip, 6a ... Bottom blade, 9 ... Flat blade tip, 9a ... Bottom blade, A ... Mark (instruction means).

Claims (1)

[Scope of utility model registration request] 1. A throwaway tip is detachably attached to a plurality of tip mounting seats provided on the outer periphery of the tip end of a tool body which is rotated around an axis, and a part of these throwaway tips is detachably mounted through a sheet member. Is a polygonal plate, and the entire length of at least one of the ridges of the upper and lower surfaces is the bottom blade, and this bottom blade projects toward the tip side more than the bottom blades of the remaining throwaways. In the throwaway type cutter, the tool body is provided with an instruction means for specifying the tip mounting seat to which the wiper blade tip is to be mounted, and the dimensional accuracy of the tip mounting seat specified by the pointing means is measured in the axial direction. Within 0.01 mm, and at least the tip end side portion of the sheet member on which the flat blade tip is placed, the upper surface is the tip of the seating surface of the flat blade tip. The seat member is formed in substantially the same shape as the flat blade tip so that it can come into contact with almost the whole, and the tip mounting seat on which this seat member is placed is such that its upper surface can come into contact with almost the entire lower surface of the seat member. A throwaway type cutter characterized by being formed in almost the same shape as.