JPS6165721A - Assembled pinion cutter - Google Patents

Abstract

PURPOSE:To facilitate the securing of a tip to a tool body to reduce the working hours in order to reduce the cost, by fixing, to the tool body, a gear shape tip in which several gear cutters are integrally incorporated with a rotary member therearound. CONSTITUTION:A gear shape tip 12 in which cutters 12a for a tooth cutting process are integrally incorporated with a rotary member chip body 12a is brazed onto a shank 11 which is a tool body, and therefore, with the shank 11 and the gear shape chip 12 a pinion cutter 02 is obtained. That is, the pinion cutter 02 may be obtained only by one time of the process of brazing the gear shape tip 12 onto the shank 11, and the positional accuracy of the cutters 12a with respect to each other may be made high. Accordingly, the polishing margin of teeth upon blade-sharpening may be set to be minimum. Further, the shank 11 and the gear shape tip 12 are made into contact with each other through a wide contact area, and therefore, the attaching rigidity of the gear shape chip 12 is increased, so that the accuracy of cut materials may be easily maintained and as well the manhours for attachment may be also reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an improvement in a binion cutter having a large number of facing tips fixed to a tool body.

<Prior art> A pinion cutter, which is one of the gear cutting tools used for cutting gears of automobiles, construction machines, industrial machines, etc., has a large number of carbide tips 2 on the outer periphery of a shank l, as shown in Fig. 2. are brazed one by one in the shape of a gear, and a blade is attached to one end of the tooth trace. Then, by reciprocating the pinion cutter in the direction of the Of axis, the locus of the cutting blade provides synchronous rotation such that the virtual gear and the workpiece mesh and move, thereby cutting the tlR surface of the workpiece. Then, as the workpiece is machined, it is fed so that the distance between the axes becomes shorter in the radial direction, and the generating motion is performed until the workpiece finally reaches the regular tooth thickness.

<Problems to be solved by the invention> This binion cutter O1 has one tip 2 on the shank l.
The pieces are brazed one by one, which requires a lot of man-hours to manufacture, and the accuracy of brazing is also limited, resulting in a large amount of grinding allowance when attaching the blade. As a result, this type of binion cutter has a relatively high manufacturing cost, and there is a strong desire to reduce the cost.

The present invention was made in response to this demand, and provides a binion cutter in which a gear-shaped tip formed by integrally forming a large number of gear cutting blades around one rotary body is fixed to the tool body, and thereby The purpose is to make manufacturing easier and to reduce the number of processing steps to reduce costs.

Means and operation for solving all the problems> The structure of the present invention to achieve this object is to attach a gear-shaped tip, which has a large number of gear cutting edges integrally formed around a rotating body, to the tool body. It is characterized by being fixed, making it easy to fix the tip to the tool body and reducing the total number of machining steps.

<Embodiment> FIG. 1 shows a binion cutter according to an embodiment of the present invention, FIG. ) shows the front side of a gear-shaped chip with many cutting edges, and Fig.
A 1-line cross section is shown.

In the shank IIK, which is a tool body, a cutting blade 12a for performing gear cutting is brazed to a tip body 12b, which is a rotary body, and a number of gear-shaped tips 12 are integrally formed with each other, and the shank 11 and gear-shaped tips 12 are Rainbow pinion cutter 0
2 are configured. In other words, this binion cutter 02
Since the work of brazing the gear-shaped tip 12 to the shank 11 is only required once, and the positional accuracy of the cutting edges 121 can be increased, the tooth profile grinding allowance t'' should be set to the minimum during cutting. In addition, since the shank 11 and the gear-shaped tip 12 are joined through a wide contact surface, the mounting rigidity of the gear-shaped tip 12 is increased, making it easy to maintain the precision of the rigid material.

<Effects of the Invention> The binion cutter of the present invention has a gear-shaped tip formed integrally with a large number of gear cutting blades formed on the turn of a rotating body, and is fixed to the tool body. The installation work is easy, the number of processing steps required for fixing work is reduced, and the positional accuracy of the cutting blades is improved, and as a result of the blade attachment, the manufacturing cost of the pinion cutter can be dramatically reduced.

[Brief explanation of drawings]

Fig. 1 shows a binion cutter 1 according to an embodiment of the present invention, Fig. 1(a) is a partially sectional side view thereof, Fig. 1 axis) is a front view thereof, and Fig. 1(C) shows a large number of teeth. FIG. 1(d) is a front view of the formed chip, FIG. 1(d) is a sectional view taken along line 1-1 in FIG.
Figure a) is a partially sectional side view, and Figure 2) is a front view. In the drawing, 02 is a binion cutter and 11 is a shank. 12 is a chip, 12a is a cutting blade, and 12b is a chip body.

Claims (1)

[Claims] A pinion cutter is characterized in that a gear-shaped tip formed by integrally forming a number of cutting blades around a rotating body is fixed to a tool body.