JPS6113219Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a tooth surface additional machining device for performing taper machining on a workpiece in which a tooth profile has been formed in advance.

As is well known, taper portions 2 are generally formed on the tooth surfaces of gears 1 that engage and disengage gears such as clutch gears as shown in FIG. For example, there is an apparatus shown in FIG. 2 as an apparatus for taper processing. This is a gear cutting machine using a so-called pinion cutter, which moves a cutter spindle 4 equipped with a cutter 3 up and down in the diagonal direction shown by arrow A and in the direction shown by arrow B with respect to a workpiece W supported by a work head 5. By moving and shaping the work W, and further rotating the work head 5 slightly, the teeth themselves are created and at the same time taper processing is performed with one set of the work W.

However, such conventional methods require specialized and expensive equipment capable of so-called diagonal cutting, and since it is not possible to simultaneously process multiple pieces, the cutting time for each workpiece is long, making mass production difficult. The problem is that it is not suitable for

This idea was made based on the above-mentioned problems, and it provides an additional machining device that coins a workpiece on which a tooth profile has been formed in advance by engaging a tool for applying taper machining to the workpiece. The purpose of this study is to solve the above problems.

Hereinafter, embodiments of this invention will be described in detail based on the drawings.

FIG. 3 shows an embodiment of the tooth surface additional machining device according to this invention, where 10 is a cutter head which is a tool support means, and 11 is a workpiece support means provided opposite to the cutter head 10, which is a workpiece head. . The cutter head 10 is configured to be moved toward and away from the work head 11 by a reciprocating drive means (for example, a slide base type) not shown.

Further, the cutter head 10 is provided with a pair of arms 12, and a cutter holder 13, which is a cutter spindle, is supported between these arms 12 via a bearing 14, and this cutter holder 13 is rotationally driven. It is configured to be rotationally driven by a prime mover (not shown) as a means through transmission gear trains 15 and 16. A cutter having a tooth surface and tooth profile corresponding to the generated tooth surface, that is, a phrasing cutter 17 having a tapered blade portion 17a as shown in FIG. 1, is integrally fixed to the cutter holder 13 by a bolt 18. has been done.

On the other hand, on the work head 11 side, there is a pair of pedestals 1.
9 are arranged facing each other, and rotatable work spindles 20a and 20b are individually supported on each of these pedestals 19, and the work spindle 20a located on the right side in the figure is separated from the other work spindle 20b. It is configured to be able to move back and forth. And the work spindles 20a, 2
0b has a pair of male and female work clamp jigs 21, 2.
A work mandrel 23 consisting of two is attached.

A workpiece fitting part 22b and a convex part 22a having a centering reference surface are formed at the tip of the workpiece clamping jig 22, and the workpiece clamping jig 21 is provided opposite to this workpiece clamping jig 22.
A recessed portion 21a having a workpiece fixing surface 21b and a centering reference surface for centering the workpiece W by fitting with the convex portion 22a is formed at the tip of the recessed portion 21a.

When the workpiece spindle 20a is in the retracted state (FIG. 3 shows the forward state), the workpiece W has been previously subjected to primary machining, which is gear cutting of the spur gear (therefore, the taper machining shown in FIG. 1) Only the unprocessed workpiece) is clamped into the workpiece clamp jig 22.
At the same time, the other workpiece clamping jig 21 is moved forward, and the convex portions 22a and concave portions 21a are fitted into each other for centering. Further, by advancing the workpiece clamping jig 21, the workpiece W is regulated and clamped by the workpiece fitting portion 22b and the workpiece fixing surface 21b.

Next, the operation of the additional machining device configured as above will be explained.

After positioning and clamping the workpiece W, which has undergone the primary processing as described above, so as to mesh with the phrasing cutter 17, the cutter holder 13 is rotated and the cutter head 10 is advanced relative to the workpiece head 11, thereby separating the workpiece W and the phrasing cutter 17. The phrasing cutter 17 is rotated synchronously. Then, when the cutter head 10 is further advanced relative to the work head 11 by a preset dimension, the phrasing cutter 17 and the work W
This results in a so-called rolling state, and a tapered portion as shown in FIG. 1 is formed on the tooth surface of the workpiece W by pressing. As a result, a gear having tapered tooth surfaces around the entire circumference of the workpiece W is created.

Thereafter, the cutter head 17 is moved back to take out the workpiece W, and the same operations as described above are repeated.

In the above embodiment, the cutter head 10 was arranged to be close to and separated from the work head 11, but instead of this, the cutter head 10
The work head 11 may be spaced close to each other. Alternatively, the cutter spindle 13 and the work spindles 20a, 20b may be rotated by separate rotation drive means so as to be completely synchronized.

Furthermore, in the above embodiments, for convenience of explanation,
Although a device equipped with one workpiece W and one cutter 17 has been described, in the case of mass production, a large number of cutters 17 will be arranged in parallel on the cutter pendle 13, and a clamp jig will be installed to accommodate this. 22 is replaced with one having a longer workpiece fixing reference surface 22a to clamp a large number of works W.

As is clear from the above description, according to the tooth surface additional machining device of this invention, the tooth surface of the workpiece is shaped into a tapered shape by meshing a tapered tooth-shaped tool with a workpiece on which a spur gear tooth profile has been formed in advance. Since the gear is press-formed, it is possible to perform gear processing at an overall low cost with relatively simple pre-processing and additional processing using the device of the present invention, making it especially suitable for mass production.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the tooth profile of a clutch gear having a tapered portion as an example, Fig. 2 is an explanatory diagram of a conventional gear cutting device, and Fig. 3 is an explanation of only the main parts showing the configuration of the additional machining device in this invention. It is a diagram. 10... cutter head (tool support means), 1
1... cutter head (work supporting means), 13
... Cutter holder, 17 ... Phrasing cutter, 20, 20b ... Work spindle, 2
1, 22... Work clamp jig, 23... Work mandrel.

Claims (1)

[Scope of utility model registration request] A workpiece supporting means for supporting a workpiece such as a gear on which a spur gear tooth profile has been formed in advance, and a processing tool that meshes with the workpiece and has a processing tooth profile formed thereon for stamping the entire tooth surface of the workpiece into a tapered shape. , a tool support means for supporting the machining tool, a drive means for moving these two support means close to each other and a distance apart, and a rotation drive means for rotationally driving at least one side of the workpiece and the machining tool. A device for additional machining of tooth surfaces.