JPH0573525B2 - - Google Patents

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Field of Application) The present invention meshes a work gear, which is a gear to be machined, and a burnishing gear, which is a processing gear, under pressure, thereby improving the tooth surface of the work gear. The present invention relates to a single-axis burnishing device that burnishes a ridgeline.

(Prior Art) Usually, burrs, burrs, etc. that significantly impair the performance of gears occur mostly on the ridgeline of the tooth surface.

Therefore, after the gears are hardened, an automatic gear sorter is used to detect burrs, burrs, etc. on the ridgeline of the tooth surface and then sorted.In order to stabilize the sorting data, the sorting process using the automatic gear sorter is In many cases, in the first stage, a burnishing process is performed using a burnishing device to remove burrs, burrs, etc. from the ridgeline portion of the tooth surface.

Conventionally, as shown in FIG. 4, this burnishing device is configured to sandwich and pressurize a work gear 2, which is a gear to be machined, between three burnishing gears 1a, 1b, 1c. , 1c and the work gear 2,
By actively applying the ridgeline portion of the tooth surface of the work gear 2, it is possible to remove burrs, burrs, etc. from that portion.

And each vanishing gear 1a, 1b, 1c
If the tooth profile and tooth trace of the work gear 2 are not modified, it is relatively easy to design and manufacture the burnishing gears 1a, 1b, 1c. , formed on the tooth ridge.

As shown in FIG. 5a, the vanishing gear 1a has teeth with a large helix angle, and by meshing with the work gear 2, points A and B of the tooth flank 2a of the work gear 2 in the tooth width direction end region are formed. Pressure is applied to remove burrs, burrs, etc.

As shown in FIG. 5b, the vanishing gear 1b is configured such that the helix angle of the teeth is small, and due to meshing with the work gear 2, points C and D of the end area in the tooth width direction of the tooth surface 2a of the work gear 2 are formed. They are pressed together and pressure processing is performed.

As shown in FIG. 5c, the vanishing gear 1c has a tooth pressure angle larger than that of the work gear 2, and when it meshes with the work gear 2, it comes into pressure contact with the EF point of the tooth tip of the work gear 2. Then, pressure processing is performed on the tooth tips.

As described above, the work gear 2 was pressurized using the three burnish gears 1a, 1b, and 1c formed with special tooth profiles and tooth traces.

(Problems to be solved by the invention) The conventional burnishing device described above has a special tooth profile,
It requires three burnishing gears configured in tooth traces, and these burnishing gears are expensive because they are hardened and coated to a fairly high degree of hardness, and they also support each burnishing gear and pressurize the work gear. The mechanism was complicated.

The present invention has been made in view of the above-mentioned points, and it is possible to perform burnishing processing to remove burrs, burrs, etc. from the ridgeline portion of the tooth surface of the gear to be machined using a single machined gear, thereby simplifying the structure of the device itself. The object of the present invention is to provide a single-axis burnishing device that can be

[Structure of the invention]

(Means for Solving Problems) The present invention meshes a workpiece gear 2 and a workpiece gear 1 formed to have a wider tooth width than the workpiece gear 2 under pressure. A burnishing device for burnishing a ridgeline portion of a tooth surface of a processed gear 2, the burnishing device comprising: a first support means for rotatably supporting either the processed gear 2 or the processed gear 1, for example, the processed gear 2; 11 and the other machining gear 1 rotatably supported, and the rotational axis of the other machining gear 1 is such that this rotational axis and the rotational axis of the one machining gear 2 are in the same plane. a second support means 21 that is swingably supported around a rotation center perpendicular to this plane and that changes the meshing angle of the other processed gear 1 with respect to the one processed gear 1;
A rotary drive means 25 provided on at least one of the first and second support means 11 and 21 to rotationally drive the processing gear 1; and a rotation drive means 25 provided on at least one of the first and second support means 11 and 21. The apparatus is equipped with a pressurizing means 14 for pressurizing the gear 2 to be processed and the gear 1 to be processed in a meshed state.

(Function) In the present invention, for example, the rotational axis of the processing gear 1 and the rotational axis of the to-be-processed gear 2 are in the same plane, and the rotational axis of the processing gear 1 is oscillated about a turning center perpendicular to this plane. By varying the meshing angle of the processed gear 1 with respect to the processed gear 2, the entire area in the tooth width direction of the ridgeline portion of the tooth surface of the processed gear 2 is burnished to remove burrs, burrs, etc. from the ridgeline portion. do.

(Embodiment) Hereinafter, the configuration of an embodiment of the present invention will be described with reference to FIGS. 1 to 3.

Note that the same reference numerals are used for structures that are the same as the conventional structure, and the description thereof will be omitted.

In FIG. 1, 11 is a work gear support means as a first support means, and this support means 11 is
A work gear 2 as a gear to be machined is rotatably supported in a horizontal state by a support shaft 12.
is vertically installed on a cart 13 which is movable in the direction of applying pressure to the burnishing gear 1 as a machining gear (in the direction of the arrow in FIG. 1).

Further, on the rear end side of the truck 13 (on the left side in FIG. 1), a pressurizing means 14 is provided for pressurizing the work gear 2 against the burnishing gear 1 with a predetermined pressurizing force.
This pressurizing means 14 is composed of a pressurizing cylinder 15 operated by, for example, hydraulic pressure, and the tip of the operating shaft 15a of this pressurizing cylinder 15 is connected to the carriage 13.
is connected to.

Reference numeral 21 denotes a vanishing gear supporting means as a second supporting means. In this supporting means 21, a support shaft 22 on which the vanishing gear 1 is attached at the upper end is rotatably supported by a shaft support 23, and a lower end of this support shaft 22 is rotatably supported. In this case, a driven pulley 24 is fixed, and a belt 27 is stretched between the driven pulley 24 and a drive pulley 26 fixed to a drive shaft 25a of a drive motor 25. The vanishing gear 1 is rotationally driven via 22 and the like. The drive motor 25 and the like are configured as rotational drive means for rotationally driving the vanishing gear 1.

Further, the shaft support 23 has the support shaft 22 and the support shaft 12 in the same plane, and is supported so as to be swingable about a pivot center (rotational connection member 32 to be described later) perpendicular to this plane. , a tilting means 31 for tilting the support shaft 22 is provided. This tilting means 31
connects the lower end of the shaft support 23 to the rotational connection member 32.
The upper end of the support shaft 22 is connected to the fixed body 33 whose position is fixed by the rotation connecting member 32.
Further, a cam 34 for controlling the tilt of the support shaft 22 is in contact with the upper side surface of the shaft support 23 on which the rotation connecting member 32 is provided. The cam 34 causes the support shaft 22 to be continuously tilted via the shaft support 23.

Next, a processing operation by the burnishing device configured as described above will be explained.

The vanishing gear 1 is attached to the spindle 22, and the work gear 2 is attached to the spindle 12, and as shown in FIG. and tilt it at θ°.

Work gear 2 is activated by operating pressurizing cylinder 15.
is meshed with the inclined burnishing gear 1 and pressurized with a predetermined pressure, and the drive motor 25 is driven to rotate at a predetermined rotational speed to rotate the burnishing gear 1 and the work gear 2 meshing with the burnishing gear 1.

Due to this meshing rotation, the range of the ridge line a of the tooth surface 2a of the work gear 2 as shown in FIG. 3 meshes with the tooth surface of the vanishing gear 1 in a press-contact state,
Burrs, burrs, etc. within the range of the ridgeline a are removed.

Next, as shown in FIG. 2B, the support shaft 22 is continuously swung parallel to the support shaft 12 while the burnishing gear 1 and the work gear 2 are engaged and rotated. Also at this time, the work gear 2 is pressurized with a predetermined pressure by the pressure cylinder 15 against the burnishing gear 1 which has been shifted to the horizontal state.

In this meshed state, the tooth surface of the burnishing gear 1 meshes with the range of the ridge line b of the tooth surface 2a of the work gear 2, as shown in FIG. 3, and burrs, burrs, etc. in the range of the ridge line b are removed. .

Next, as shown in FIG. Tilt and swing. At this time too,
The work gear 2 is pressurized to the inclined burnishing gear 1 by a pressure cylinder 15 with a predetermined pressure.

In this meshing state, the tooth surface of the burnishing gear 1 meshes with the range of the ridge line c of the tooth surface 2a of the work gear 2, as shown in FIG. etc. are removed.

As described above, by varying the meshing angle of the burnishing gear 1 with the work gear 2,
Burnishing is performed on the ridgeline portions a, b, and c of the tooth surface 2a of the work gear 2.

If the crowning of the tooth surface 2a of the work gear 2 is large, the burr on the ridgeline of the tooth surface 2a can be reduced by appropriately adjusting the inclination angle θ and -θ of the support shaft 22. , burrs, etc. can be removed, but the amount of crowning is usually 0.02
Abnormal meshing does not occur at ~0.03/20 (tooth width) mm.

Further, in the above embodiment, the engagement angle of the burnishing gear 1 with respect to the workpiece gear 2 is varied, but the burnishing gear 1 is attached to the spindle 12 and the work gear 2 is attached to the spindle 22, so that the meshing angle of the burnishing gear 1 with respect to the burnishing gear 1 is changed. The work gear 2 may be burnished by varying the engagement angle of the work gear 2.

〔Effect of the invention〕

According to the present invention, the axis of rotation of one of the gears to be processed and the axis of rotation of the other gear are in the same plane, and the one gear is oscillated about a turning center perpendicular to this plane. By varying the meshing angle of the other gear and using a machining gear with a wider tooth width than the gear to be machined, one machining gear can cover a wide range of the ridgeline of the tooth surface of the gear to be machined. Burnishing can be performed reliably over a period of time, only one expensive machining gear is required, and the structure of the device itself can be simplified.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing one embodiment of the apparatus of the present invention, FIG. 2 is an explanatory diagram showing its machining operation, FIG. 3 is a partial perspective view showing the tooth surface of the gear to be machined, and FIG.
The figure is a schematic diagram of a conventional apparatus, and FIG. 5 is an explanatory diagram showing its processing operation. 1... Vanishing gear as a processing gear, 2...
...Work gear as a gear to be machined, 11...1st
Work gear support means as a support means for 14...
. . . Pressure means, 21 . . . Vanishing gear support means as second support means, 25 . . . Drive motor constituting a part of rotational drive means.

Claims (1)

[Claims] 1. Burnishing the ridgeline portion of the tooth surface of the gear to be machined by meshing the gear to be machined and a gear to be machined with a width wider than that of the gear to be machined under pressure. A burnishing device for machining, comprising: a first support means rotatably supporting one of the to-be-processed gear and the processing gear; a first support means rotatably supporting the other gear; The rotational axis of the gear is pivoted so that it can swing around a rotation center perpendicular to this plane, with this rotational axis and the rotational axis of the one gear above being in the same plane, and the other gear meshing with the one gear. a rotational drive means provided on at least one of the first and second support means to rotationally drive the gear; and at least one of the first and second support means. A uniaxial burnishing device comprising: a pressurizing means for pressurizing the to-be-processed gear and the processed gear in a meshed state.