JP2010110886A - Chamfering cutter which can also chamfer elongate hole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chamfering cutter that performs high-speed hole chamfering and elongate-hole chamfering on a drilling machine, which have not been done by a conventional chamfering cutter unless a milling machine, machining center, or the like is used for the high-speed hole chamfering and elongate-hole chamfering. <P>SOLUTION: By providing a guide (3) having elastic force, the inner face of a workpiece (13) is brought into press contact with the guide stronger, and chattering of the workpiece with the chamfering cutter is suppressed to perform high-speed hole chamfering and elongate-hole chamfering by a drilling machine which have not been done before. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a chamfering cutter in which a chamfering of a long hole as well as a round hole enables high-speed rotation processing on a drilling machine by providing an elastic body guide at the tip of a main body.

Conventionally, when chamfering is performed with a drilling machine, it is common to use a chamfering cutter that does not have a guide to hold the inner surface, so it is necessary to compensate for the disadvantage of chattering on the machined surface when chamfering a large diameter. As a result of having to remarkably reduce the upper cutting rotation speed, the work efficiency and the surface ancestry are reduced.
See http://www.nttool.com/seihin/mentori.html

The structure of most conventional chamfering cutters has a structure in which one to multiple flutes are cut radially on an inverted triangular slope, so re-polishing when the flutes are worn is not easy and durable. Is also very inferior.

Moreover, with the conventional chamfering cutter, the chamfering of the long hole in the drilling machine is impossible and not applicable due to its structure.

As conventional chamfering cutters become chattered and cheaper as they become larger in diameter, they are forced to rotate at a low speed as a means to eliminate them. Has led to a decline.

    In addition, most of the cutting blades do not use a super-hard material, and the durability is low and uneconomical.

In the current chamfering process, chamfering of long holes is impossible with a drilling machine, so it is forced to rely on machines such as milling machines, and a large amount of time is spent on a simple process that is not directly related to chamfering. And spending effort.

By providing a rotatable elastic body guide at the tip of the chamfering cutter body,
Since the guide presses the inner surface of the workpiece, even if chamfering is performed at high speed, chattering is suppressed and a stable result can be obtained.

In addition, by providing a guide with elasticity, it is possible to make the inner surface of the workpiece more strongly press-contacted, and it is possible to chamfer a long hole on a drilling machine, which was impossible in the past. Is.

The cutting edge provided on the head of the chamfering cutter of the present invention is an ultra-hard material and is extremely durable, and is designed so that a commercially available cutting edge can be attached. There is also an advantage that a cutting blade can be obtained and can be easily replaced.

In the present invention, since the guide is inscribed before the cutting edge comes into contact with the corner of the workpiece during chamfering because the elastic body guide is provided at the tip of the chamfering cutter body, the cutter body is very high with respect to the left and right. As a result of maintaining the stability, high-speed rotary cutting can be obtained without damaging the inner surface of the workpiece due to the rotation of the guide, which makes it possible to significantly improve the surface ancestry and increase work efficiency. It can be made.

Furthermore, the greatest effect of providing an elastic guide is the drilling machine, which has been impossible with conventional common sense, and the chamfering of long holes is also possible by using a rotatable guide with elastic force. As a result of strong pressure welding without damaging the inner surface, it can be made possible.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the present invention provides a guide (3) adjacent to a conical guide piece (2) at the tip of a chamfered cutter body (1) on a cutter head (5) with respect to a rotation axis (Y). Make an angle of 45 degrees,
The part to be chamfered can be cut with the provided cutting blade (4).

Further detailed description in FIG. 2 First, a guide (3) that can be rotated by a guide piece (2) at the tip.
Can be chamfered to the inside of the hole to be chamfered and brought into close contact with the inner surface (b) to suppress blurring of the main body and stabilize, and then the mouth (a) portion can be chamfered with the cutting edge (4).

In addition, the chamfering of long holes requires higher stable cutting than round holes.
As shown, two guides (3) are provided at positions opposite to the number of cutting blades, and the chamfering can be stably performed by replacing the guide (3) with one having a stronger elastic force.

Fig. 4 shows that each of the guide piece (2), guide (3), and cutting blade (4) can be easily disassembled and replaced. It is shown that the replacement can be easily and quickly performed.

As for the elastic body used for the guide (3), any material may be used as long as it has elasticity such as resin, rubber and springs.

    Figure 5 shows a chamfering cutter with a chamfering depth stopper and a chamfering size adjustment device attached to the chamfering cutter body (1). By rotating the stopper adjustment ring (7) left and right, the thrust bearing (8) is at the tip. Since the stopper ring (6) that is installed moves up and down and the chamfered part (a) where the cutting edge (4) hits the work piece (13) can be adjusted arbitrarily, the thrust bearing (8) is attached to the work piece (13). By chamfering the oblong hole by pressing it on the upper surface, it is possible to stably chamfer the oblong hole while maintaining the arbitrarily adjusted dimensions even in the chamfering process using a drilling machine or the like. The stopper adjustment ring (7) and stopper ring (6) are pivotably attached to the chamfering cutter body (1), and the stopper part that contacts the workpiece (13) is the thrust bearing (8). As a result, the upper surface of the work piece (13) was prevented from being scratched by the portion where the stopper contacts. Of course, chamfering of round holes as well as chamfering of long holes is possible.

It is a chamfering cutter with one cutting edge. The chamfering process is shown. A chamfering cutter with two cutting edges. It is an exploded view of a chamfering cutter. Chamfering cutter with chamfering stopper and adjusting device Oblique view of chamfering cutter with chamfering stopper and adjusting device

1 ... Chamfering cutter body
2 ... guide piece
3 ... Elastic body guide
4 ... Cutting blade
5 ... Cutter head
6.Stopper ring
7 ... Stopper adjustment ring
8 Thrust bearing
9 ... ball gearing
10 ... Retaining cover
11 ... Snap ring
12 ... screw
13 ... Screw adjustment section
a ... Chamfer
b ... Inside of work piece
C ... Workpiece Y ... Axis

Claims (4)

Replaceable ultra-hard cutting blade (4) One or more cutter heads (5), a flexible elastic guide (3) at the tip, and a conical guide piece (2) at the tip A chamfer cutter constructed as above. 2. The chamfering cutter according to claim 1, wherein the chamfering of the elongated hole is enabled by providing a rotatable guide (3) having an elastic force. 2. The chamfering cutter according to claim 1, wherein a flexible elastic body guide (3) having various diameters can be exchanged to cope with a chamfering with a multi-diameter.     The ball bearing (9) is fixed to the shaft near the cutter head (5) of the chamfering cutter body (1) so that it does not come off with the snap ring (11), and the bottom (step) that supports the bottom of the bearing (9) ) Wait for the structure of the stopper adjustment ring (7) into the outer periphery of the ball bearing (9) to prevent the upper part from falling off and fix the cover (10) with the screw (12). 1) It is possible to attach the stopper adjustment ring (7) to the stopper ring (6), which is attached so that the thrust bearing (8) does not come out at the bottom. 7) and the thrust bearing (8) is pressed against the upper surface of the work piece (13) and the long hole is chamfered to maintain a constant size even when used in drilling machines. Chamfering is possible, and the stopper ring (6) and thrust bearing (8) move up and down relative to the cutting edge (4) by rotating the stopper adjustment ring (7). 2. The chamfering cutter for long holes and round holes according to claim 1, which can be adjusted arbitrarily.