JPS62102961A - Edging method for pinion cutter and its edging tool - Google Patents

Abstract

PURPOSE:To form the rake angle via continuous rotations by forming the cross section of the generate cutting tooth spirally formed on the outer periphery of a short-circle columnar tool main body in an angle to match the shape of a rake face and arranging its edge height in a drum face shape. CONSTITUTION:An edging tool 10 integrally molds the generate cutting tooth spirally on the outer periphery of a short-circle columnar tool main body 11. The cross section of this generate cutting tooth 12 is formed in an angle to match the shape of a rake face 14 formed on the cutting edge face 13 of a pinion cutter (a), and its edge height is formed in a drum face 15, with the center portion of the tool main body 11 kept high and both end sides kept low. Edging machining using this edging tool 10 is performed in the same way as for hobbing. In this machining, since the generate cutting tooth 12 is formed in a drum face shape, the rake face 14 can be formed without scraping off the necessary tooth profile, thus allowing continuous rotations.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a pinion cutter cutting method for creating a surface to form a tooth profile rake angle on the cutting edge surface of a pinion cutter, and a cutting tool thereof.

<Prior art> As shown in Fig. 6, in a conventional pinion cutter, the cutting edge surface 1 of the tooth profile forms one conical surface, and the tooth tip 2 is provided with a rake angle α. 4 and 4 did not have a horizontal angle.

<Problems to be Solved by the Invention> As mentioned above, in the conventional pinion cutter, a rake angle was not provided on the tooth profile surfaces 4, 4, and therefore, non-conformity such as peeling occurred on the tooth surface of the workpiece gear. Many of them were particularly unsuitable for high-speed cutting. Furthermore, although it has been considered to provide a rake angle to the tooth profile surfaces 4, 4, it has been difficult to process and therefore expensive, and therefore has not been actually implemented.

The present invention ζ, in consideration of the conventional problems mentioned above, provides a pinion cutter blade setting method and a blade tool thereof that can more easily create a tooth profile rake angle by using an NC processing machine etc. purpose.

Means for Solving the Problems> As mentioned above, the gist of the present invention for solving the problems of the conventional art and achieving the intended purpose is to A short cylindrical bladed tool having a corresponding chevron-shaped generating blade part on the outer peripheral surface is used, and while rotating the bladed tool, the generating blade part is brought into meshing contact with the cutting edge surface of the pinion cutter. A cutting method of a pinion cutter that creates a tooth profile rake angle on the cutting edge surface of the pinion cutter, and a tool body having a short cylindrical shape, and a tool body provided in a spiral arrangement on the outer circumferential surface of the tool body, and a cross section of the pinion cutter. The tool has a generated blade portion shaped to match the rake angle of the tooth profile formed on the blade surface, and the generated blade portion is formed into a drum shape with a high blade height at the center portion of the tool body and low sides at both ends. It is a pinion cutter blade tool.

This pinion cutter blade setting method is that when the blade tool is rotated once and moved in the direction of the cutting edge, the generated blade part on the cutting edge side of the pinion cutter is spiral, so the spiral The pinion cutter moves in the direction of the rotation axis depending on the pitch and rotational speed, and by rotating the pinion cutter in accordance with this movement, the spiral generating blade portion moves the cutting surface toward the tooth tip to form a rake surface. In addition, by making the helical pitch of the creation blade correspond to the pitch of the pinion cutter, the pinion cutter and the bladed tool can be continuously rotated, and the bladed tool can be continuously reciprocated to continuously process each cutting edge surface. You can also.

In addition, this bladed tool has a drum-shaped blade height on the creating blade, so that when it is continuously operated, the rotation of the pinion cutter will interfere with the torsion of the tool and the tooth profile in the necessary area will not be scraped off. is created.

Example of implementation Next, an example of implementation of the present invention will be described with reference to the drawings.

FIG. 1 shows a bladed tool according to the present invention, and this bladed tool 10 has a short cylindrical tool body 11 and a generating blade portion 12 integrally formed in a spiral arrangement on the outer peripheral surface of the tool body 11. . As shown in FIG. 2, this generating blade portion 12 is formed into a chevron-shaped cross section with an angle matching the shape of the rake surface 14 formed on the cutting surface 13 of the pinion cutter a shown in FIG. There is. Further, the creating blade portion 12 is shaped so that its blade height is placed on a drum surface 15 with the center portion of the tool body 11 being high and both ends being low, as shown in FIG.

Although not shown in the figure, the bladed tool 10 may be a grinding wheel or a cutting tool.
In the case of a grindstone, the created blade part 12 becomes a continuous spiral protrusion,
In the case of a cutting tool, the generated blade portion has a shape in which cutting blades are arranged in a spiral arrangement.

Next, an embodiment of the cutting method of the present invention using the cutting tool 10 described above will be described.

In this method, as shown in FIG. 3, the pinion cutter a is centered and fixed on a support base 16 for rotationally driving the pinion cutter a, with the cutting edge 13 facing upward. Then, the bladed tool 10 supported on the rotating shaft 17 on the surface of the cutting edge 13 is rotated, and the surface of the cutting edge 13 is machined by the generating blade part 11. At this time, while rotating the cutting tool 10, the cutting tool 10 is reciprocated in the direction of the cutting edge of the cutting surface 13 shown by the arrow 17 in FIG. It is rotated by the pitch and processed while performing the same mutual rotational movement as the mutual rotation of the worm and the pinion gear meshed with it. In other words, the cutting process is done in the same way as hobbing. In this way, the pinion cutter a
Rotate once or several times to obtain the desired tooth profile (as shown in Fig. 5).
Create a rake angle (side rake angle) β.

In addition, since the creating blade part 12 of the bladed tool 10 has a drum-like shape with a low blade height at both ends, as the pinion cutter a rotates, it interferes with the thread of the bladed tool 10 and cuts to the required tooth profile. The rake faces 14, 14 can be machined without being dropped.

<Effects of the Invention> The pinion cutter cutting method and its cutting tool of the present invention are configured as described above, and the cutting edge surface of the pinion cutter is machined using the cutting tool having a spiral generating cutting edge on the outer periphery. At this time, the bladed tool is rotated and moved toward the cutting edge of the pinion cutter, and the pinion cannon is rotated in accordance with the helical pitch of the creating blade, so that each tooth of the pinion cannon is rotated. It is possible to form the rake angle of the entire tooth profile by continuous rotation without having to divide each ridge into a cutting process, making it possible to easily and cost-effectively create a pinion cutter with a rake angle of the tooth profile. It becomes possible to provide pinion cutters with significantly improved sharpness at low prices in large quantities.

[Brief explanation of drawings]

FIG. 1 is a front view of the bladed tool of the present invention, FIG. 2 is a partially enlarged front view of the created blade portion of the same bladed tool, and FIG. 3 is a side view showing an embodiment of the bladed tool of the present invention. , FIG. 4 is an enlarged side view of the same part, FIG. (A) -←→ are a plan view, a vertical cross-sectional view, and a cross-sectional view of a tooth portion showing a conventional pinion cutter. Figure middle a: Yo pinion cutter, 10 is a tool with a blade, 11 is a tool body, 12 is a creating blade part, 13 is a cutting edge surface, 14 is a rake surface, 15 is a drum surface, 16 is a support base, 17 is a It shows the axis of rotation. Figure 1 Figure 3 Figure 2 Figure 4 Me2

Claims (2)

[Claims] (1) Use a short cylindrical bladed tool that has a chevron-shaped generating blade part on its outer circumferential surface that corresponds to the rake angle of the tooth surface of the pinion cutter, and rotate the bladed tool while creating the blade. A method for setting a pinion cutter blade, characterized in that a tooth profile rake angle is created on the cutting edge surface of the pinion cutter by bringing the part into meshing contact with the cutting edge surface of the pinion cutter. (2) A tool body with a short cylindrical shape, and a generating blade provided in a spiral arrangement on the outer peripheral surface of the tool body and whose cross section matches the rake angle of the tooth profile formed on the cutting surface of the pinion cutter. A bladed tool for a pinion cutter, characterized in that the creating blade part is formed in a drum shape with a high blade height at the center portion of the tool body and low blade height at both ends.