JPS5911409B2 - Gear edge burr removal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a cutter for deburring the side edge of the tooth surface of a gear, the cutter being deburred by at least one cutting tool for machining the side edge of the tooth surface. It has a guide gear which is fixed adjacent thereto in a non-rotatable manner and meshes with the gear to be cut, and the cutting tool cuts the gear to be cut with its axis parallel to the axis of the gear to be cut. The cutting tool is formed as a gear-shaped cutting tool that rolls while meshing with the guide gear, and the cutting tool is provided with conical teeth that taper toward the guide gear, and the tooth surface or the tip surface of the tooth, or both. It relates to a type in which a stepped portion forming a cutting edge is provided.

This type of cutter has an advantage over other cutters for removing burrs on the side edge of the tooth surface of a gear to be cut, that the tool used can be manufactured easily.

Furthermore, this type of cutter operates extremely quickly.

In the conventional cutter of the type mentioned at the beginning, a second cutter is generated at the intersection line of the formed cutout surface and the effective tooth surface.
This may adversely affect gear engagement or interfere with subsequent finishing.

An object of the present invention is to avoid the formation of this second banner that occurs during the scraping operation.

The gist of the present invention that solves this problem is that, in the cutter of the type described at the beginning, the face width of the guide gear that contacts the tooth surface of the work gear is approximately equal to the effective face width of the teeth of the work gear. The inner end of the tapered conical tooth of the cutting tool is in close contact with the end face of the guide gear.

It should be noted that the expression "approximately" in claim 1 indicates a variation within the range of manufacturing error.

According to the embodiment described in claim 2, a cutting tool can be manufactured easily.

Next, the present invention will be specifically explained with reference to the illustrated embodiments.

The cutter of the present invention is for cutting off the side edge 1 of the tooth surface and the side edge 2 of the tooth bottom surface of the tooth 3 of the workpiece 4.

The cutter 5 of the embodiment shown in FIG. 2 is arranged parallel to the axis of the workpiece 4, and the cutter 5 and the workpiece 4 roll with each other while meshing their teeth.

The cutter 5 has a guide gear 6 that does not perform cutting, and one gear-shaped cutting tool 1, 8 is attached to each end face of the guide gear 6 in close contact with each other.

The cutting tools 7, 8 are provided with teeth 9 on their outer peripheries, and each tooth 9 is formed in the shape of a bevel gear tooth that tapers toward the guide gear.

The cutter can also have a cutting tool formed as a helical cylindrical gear.

The teeth 9 of the cutting tools 7 and 8 can deburr the side edge 1 of the tooth surface and the side edge 2 of the tooth bottom surface of the workpiece 4 with their tooth surfaces.

FIG. 3 is a cross-sectional view of another embodiment taken along the line ■--■ in FIG. 2.

As can be seen in FIG. 3, the teeth io, ii of the cutting tool engage the side edges of the tooth flanks of the workpiece.

The cutting tools 7, 8 of the embodiment shown in FIG. 3 differ from the cutting tools 1, 8 of the embodiment shown in FIG. 2 in that the cutting tools 7, 8 of FIG. In contrast, the tooth groove 12 of the cutting tool shown in FIG. 3 is formed as a notch without a complete tooth profile.

Therefore, the cutting tool shown in FIG. 3 has great strength.

The tooth width 40 of the guide gear 6 corresponds to the effective tooth width of the teeth 41 of the workpiece.

Since the cutting tools 7 and 8 are attached directly to the end face of the guide gear 6 in close contact with each other, the side edges of the teeth of the guide gear 6 are cut-off surfaces formed on the side edges 1 of the tooth surface of the workpiece. The line of intersection 42 between the gear end face of the guide gear, the inner end face of the conical cutting tools 7 and 8, and the cut-out surface of the workpiece and the tooth face is the same. It is located in a plane, so that no new burrs are formed in the vicinity of the intersection line 42 between the effective tooth surface of the workpiece and the cut-out surface.

The cutter is fed radially relative to the workpiece, the cutting tools 7, 8 being pressed onto the side edges 1 of the tooth flanks of the workpiece,
Remove burrs.

As shown in FIG. 4, teeth 9, 10,
A large number of grooves 14 extending in the tooth trace direction are provided on the tooth surface 11.

The intersection line between the wall surface of these grooves 14 and the tooth surface is a sharp cutting edge 15
This cutting edge 15 rolls along the side edge of the tooth surface of the workpiece and deburrs the side edge of the tooth surface of the workpiece by sliding in the tooth depth direction.

Grooves 16 are also formed on the tip surfaces of the teeth 9, 10, and 11 of the cutting tool.
Alternatively, steps 17 are provided, which likewise form cutting edges, by means of which the side edges 2 of the root surface of the workpiece are likewise stripped off.

FIG. 5 is a cross-sectional view of the teeth 9 of the cutting tools 7, 8 along the line ■--■ in FIG.

FIG. 6 is a cross-sectional view of the tooth 9 taken along the line IV--IV in FIG.

When machining a helical gear as schematically shown in FIG. 3, the inclination angle α of the tooth surfaces of the cutting tools 7 and 8 is β is different from each other on both sides of the tooth.

The inclination angle γ of the tooth tip surfaces of the cutting tools 7, 8 is determined in accordance with the desired chiseling angle of the side edge 2 of the root surface of the workpiece.

FIG. 7 shows a further embodiment of a gear-shaped cutting tool 18, in which the teeth 19, 20, 21 have different tooth depths.

The intersection line between the tooth tip surface and the tooth surface is the cutting edge 22, 23, 24, 25,
26, 27, and 28 are formed, and the side edge 1 of the tooth surface of the workpiece is deburred by these cutting edges.

The cutting tool 18 also has a stepped portion on the tooth tip surface of the tooth having only the canine tooth, and the intersection line between this stepped portion and the tooth tip surface also forms the cutting edge 29.
, 30 are formed, and the side edges 2 of the bottom surface of the workpiece are cut off by these cutting edges 29, 30.

When machining helical gears, different inclination angles are provided on both sides of the teeth of the cutting tool, as shown in FIG. 5, there are certain difficulties in creating such inclinations.

In the embodiment shown in FIGS. 8 and 9, the gear-shaped cutting tools 43 and 44 are formed as helical cylindrical gears, and the tooth surfaces 45 and 46 of the cutting tools 43 and 44 are respectively Cut off one side edge of the tooth surface of the tooth 47.

In order to cut out the other side edge of the tooth surface of the tooth 47 of the workpiece, a slope 48 is provided on the other side of the teeth of the cutting tools 43 and 44.
is provided.

One of the cutting tools 43 and 44 has right-handed helical teeth, the other has left-handed helical teeth, and the deburring surfaces on both sides of the tooth surface of the workpiece have equal angles. Therefore, in this embodiment, the teeth of one cutting tool are formed thicker than the teeth of the other cutting tool.

The cutting tools 43, 44 are circumferentially adjustable relative to the guide gear 49.

For this purpose, the following apparatus is provided in the embodiment shown in FIGS. 8 and 9.

The cutting tools 43 and 44 each have one additional part 50,
It is equipped with 50.

There are two guide gears 49 on both sides of these additional parts 50 and 51.
Two pins 52. 53, and the length of these pins 52, 53 approximately corresponds to the distance from the outer surface of one extension 50 to the outer surface of the other extension 51.

Pin 52. In order to pass the cutting tools 43 and 44 through the cutting tools 53 and 44, a through hole 5 having a diameter larger than the pin diameter is formed in the cutting tool.
4, 55 are provided, and as a result, the guide gear 4
Circumferential rotation of the cutting tool 43, 44 relative to 9 is possible.

The ends of the pins 52 and 53 are provided with screw holes passing through in the lateral direction, and adjustment screws 56 and 57 are inserted into the screw holes.
, 58, 59 are screwed in, and these adjustment screws 5
6, 57, 58, and 59 are pressed against the additional parts so and si.

By adjusting the adjusting screws 56, 57, 58, 59, the above-mentioned adjustment of the cutting tools 43, 44 can be carried out, so that the cut-out surface of one side edge of the flank of the tooth 47 of the workpiece 47 can be adjusted relative to the other side. The beveled surface of the side edge can be adjusted.

After the cutting tools 43, 44 have been adjusted and rotated relative to the guide gear 49, the cutting tools 43, 44 and the guide gear 49
are tightened by fixing screws 60 arranged parallel to the axis.

In the embodiment shown in FIG. 10, the gear-shaped cutting tool 31 has two
It is composed of two halves 32 and 33.

Each half 32 , 33 has a helical tooth 34 . 35, and the spiral winding directions of the helical teeth 34 and 35 are opposite to each other.

Each half 32, 33 of the cutting tool 31 has the task of cutting off a respective side edge of a tooth of the workpiece.

This type of cutting tool is easy to manufacture.

For one cutter, two cutting tools each having helical teeth in different directions are manufactured, and in this case, each helical tooth is adapted to cut out one side edge of the tooth surface of the workpiece. These cutting tools can then be cut into two halves and two different halves fixed on each side of the guide gear.

However, the number of teeth of the cutting tool must be chosen such that after several revolutions of the workpiece, all teeth of the workpiece are in contact with all teeth of both halves of the cutting tool).

This applies, for example, when the number of teeth of the cutting tool and the number of teeth of the workpiece do not have a common divisor.

A seam 61 is provided between the two halves 32, 33 of the cutting tool 31, which allows each half 32, 33 to rotate relative to the respective guide gear and thus relative to the workpiece. can be adjusted dynamically.

For each half 32, 33 there is a respective adjustment device 62,
63 are provided, and these adjustment devices 62 , 63
is a mechanism similar to the adjusting device in the embodiment of FIGS. 8 and 9.

The teeth 34 and 35 of the cutting tool 31 are shown in FIGS. 4, 5, and 6.
A cutting edge similar to that shown in FIGS. and 7 may be provided.

Each of the teeth 34, 35 of the cutting tool 31 burrs only one side edge of the tooth flank of the workpiece by means of one of its flanks.

This is similar to the cutting tool 43 in the embodiment of FIG. This differs from the fact that each of the 44 teeth scoops out both side edges of the workpiece tooth.

Polishing the teeth 34, 35 of the cutting tool 31 is easy as it only needs to be done on one side, and each half 32, 33 of the polished cutting tool 31 is adjusted via an adjusting device so that the tooth surfaces are in the correct position. be done.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing two teeth of a cut gear cut out by the force cutter of the present invention, Fig. 2 is a cross-sectional view of a state in which the cutter according to an embodiment of the present invention is meshed with the cut gear; 3 is a sectional view taken along the line III-III in FIG. 2, FIG. 4 is a partial end view of a cutting tool according to an embodiment of the present invention, and FIG.
The figure is a sectional view taken along line v-V in FIG. 4, FIG. 6 is a sectional view taken along line vt-■i in FIG. 4, and FIG. FIG. 8 is a sectional view of yet another embodiment of the present invention, FIG. 9 is an end view of the same embodiment, and FIG. 10 is an end view of a cutting tool according to still another embodiment of the present invention. It is. 1, 2... Marginal edge, 3... Teeth, 4...
...Workpiece, 5...Katsuta, 6...
・Guide gear, 7, 8... Cutting tool, 9, 10,
11...teeth, 12...teeth groove, 13...
...Tooth surface, 14...Groove, 15...
Cutting edge, 16...Groove, 17...Step, 1
8... Cutting tools, 19, 20, 21...
Teeth, 22, 23, 24, 25, 26, 27, 28, 29
, 30... Cutting blade, 31... Cutting tool,
32, 33... half, 34, 35...
...teeth, 40...teeth width, 41...teeth,
42... Intersection line, 43, 44... Cutting tool, 45, 46... Tooth surface, 47...
・Tooth, 48...Slope, 49...Guide gear, so, si...Additional part, 52, 53...
... Pin, 54, 55 ... Through hole, 56.5
7,58.59...adjustment screw, 60...
・Fixing screw, 61... Seam, 62...
・Adjustment device.

Claims (1)

[Scope of Claims] 1. A cutter for deburring the side edge of the tooth surface of a gear, comprising at least one cutting tool for processing the side edge of the tooth surface, and a cutter adjacent to the cutting tool in the axial direction. The cutting tool has a guide gear which is unrotatably fixed to the cut gear and meshes with the cut gear, and the cutting tool meshes with the cut gear with its axis parallel to the axis of the cut gear. The cutting tool is formed as a gear-shaped cutting tool that rotates while rolling, and this cutting tool is provided with conical teeth tapering toward the guide gear, and a cutting edge is provided on the tooth surface or the tooth tip surface or both of the teeth. In the case of a type in which a stepped portion is provided to form a gear, the tooth width of the guide gear that contacts the tooth surface of the gear to be cut 4 is formed so as to roughly correspond to the effective face width of the teeth of the gear to be cut. A cutter for deburring the side edge of the tooth surface of a gear, characterized in that the inner end of the tapered conical tooth of the cutting tool is in close contact with the end surface of the guide gear. 2. The cutting tools 43 and 44 are formed as helical cylindrical gears so that one tooth surface 45 of the cutting tool rolls on a deburring portion to be formed on one side of the tooth of the gear to be cut,
The cutter according to claim 1, further comprising a corresponding sloped surface 48 on the side edge of the cutting tool in order to form a deburring portion on the other side of the tooth of the gear to be cut.