JPS603924B2 - Face gear creation finishing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION As shown in FIG. 1, the known face gear generating finishing method uses a pinion cutter 2 whose cutting blade is configured to represent a stationary virtual gear 1 through reciprocating cutting motion. This is a method of cutting gears by applying rotational motions 4 and 5 for generation to the pinion cutter 2 and the face gear 3 to be cut.

The pinion cutter 2 used at this time can be called a reciprocating pinion cutter.

This method is carried out on a general-purpose gear shaping machine with special attachments.

In contrast, the method of the present invention is directed to a method that can create and finish the face gear using a general-purpose hobbing machine without the use of special accessories.

This method will be explained with reference to FIG.

The cutter used is indicated by 6.

The cutting edges attached to each cutting groove of the cutter 6 are slightly shifted in phase so that as the cutter 6 rotates, they rotate around another axis ○8 that is perpendicular to the cutter's rotation axis ○7. . The rotational axis 7 of the cutter and the other axis 8 normally form a right angle, but if there is a risk that the flank of the cutting edge of the cutter may interfere with the cutting surface, the axis 7 of the cutter should be set to the other axis. heart 8
The position may be slightly changed from the perpendicular position.

Therefore, when the cutter 6 rotates in the direction shown by the arrow 9, its blade will represent a part of the virtual gear 10 that rotates around the sea bream 8 as shown by the arrow 11.

The position of the face gear 3 to be gear-cut is selected so that it meshes correctly with the virtual gear 10, the cutter 6 rotates once in the direction shown by the arrow 9, and the virtual gear 10 rotates by one pitch in the direction shown by the arrow 11. In the meantime, keep the face gear 3 rotating one pitch in the direction shown by arrow 5, and move the cutter in the direction shown by arrow 1.
If it is sent in the direction shown by 2, the tooth surface of the face gear 3 can be finished with a new finishing.

Since the cutter 6 represents a virtual gear whose cutting edge rotates through rotational motion, it can be called a rotary pinion cutter as opposed to a known reciprocating pinion cutter.

JISBO174-1978 Hob is a gear cutting tool with many grooves that cross the threads of the worm.
It is a gear cutting tool that has a cutting edge with a relief surface between adjacent pieces 1 along the thread, and the rotary pinion cutter referred to here does not have the above-mentioned worm thread. However, considering the shape of the cutter, it can be considered a special hob.

In order to carry out the face gear generation finishing method of this invention using a general-purpose hobbing machine, the face gear is mounted on the hobbing machine table, a cutter is attached to the hob main shaft, and the table rotates the face gear per rotation of the hob shaft. The indexing gear may be selected to rotate at a ratio of 1/the number of teeth, and both may be rotated to give the table radial feed.

That is, when the cutting blade of the cutter 6 performs a rotary cutting motion, a part of the virtual gear 10 rotating around another center 8 that is perpendicular to the rotation axis 7 is displayed. Using a rotary pinion cutter 6 configured as shown in FIG. The tooth surface is finished by rotating both at a ratio of 1 and sending the cutter 6 in the direction of the center of the virtual pinion 10, that is, in the radial direction of the face gear 3.

According to the method of the present invention, the hobbing machine, which is the most widely used gear cutting machine, has the effect of being able to generate and cut the correct face gear with high productivity without using any special accessories.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a known face gear generation finishing method, in which 1 is a virtual gear represented by the cutting edge of the cutter, 2 is a reciprocating pinion cutter, 3 is a face gear to be geared, 4 is an arrow indicating the rotation direction of the pinion cutter, 5 is
This is an arrow indicating the direction of rotation of the face gear. FIG. 2 is an explanatory diagram of the face gear generation finishing method of the present invention, in which 3 indicates the face gear 5 to be cut with an arrow indicating the direction of rotation of the face gear, 6 indicates a rotary pinion cutter, and 7 indicates a cutter. , 8 is the center of the virtual gear 10 represented by the cutting blade of the cutter, 9 is an arrow indicating the rotation direction of the cutter, 11 is the virtual gear 1 represented by the cutting blade of the cutter
An arrow 0 indicates the direction of rotation, and an arrow 12 indicates the feed direction of the cutter. Next figure 1, figure 2

Claims (1)

[Claims] 1 The cutting blade of the cutter 6 performs a rotary cutting motion so as to represent a part of a virtual pinion 10 that rotates around another axis 8 that is perpendicular to the rotation axis 7. Using the configured rotary pinion cutter 6, select a relative position so that the virtual pinion 10 and the face gear 3 to be cut are engaged with each other, and for one rotation of the cutter 6, the face gear 3 is cut as many times as the number of teeth. A face gear generation finishing method characterized in that the tooth surface is finished by rotating both at a ratio of 1 and sending the cutter 6 in the axial direction of the virtual pinion 10, that is, in the radial direction of the face gear 3.