JPH0899220A - Burnishing device for gear - Google Patents

Abstract

PURPOSE: To provide a burnishing device for a gear by which the cost reduction of equipment can be achieved with a simple mechanism. CONSTITUTION: First burnishing teeth 25 and second burnishing teeth 26 for burnishing the side end parts of the tooth surfaces of a work gear G, and third burnishing teeth 27 for burnishing the tips of the tooth surfaces of the work gear G are formed on the same circumference of a burnishing gear 13. Further, the burnishing device is provided with a pressurizing mechanism for pressing the work gear W against the burnishing gear 13 and a driving mechanism for rotatingly driving the burnishing gear 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a gear suitable for use in removing minute burrs, burrs and the like on the tooth surface generated during machining or transportation when machining a gear such as an automobile gear. The present invention relates to a burnishing device.

[0002]

2. Description of the Related Art Generally, when a gear such as an automobile gear is machined, burrs and burrs are generated on both end portions A and B and a tooth tip portion C of a tooth surface of a gear G as shown in FIG. Sometimes.

Conventionally, in order to remove such burrs and burrs, for example, the following burnishing device has been used. As shown in FIG. 6 (a), the burnishing device 1 surrounds the work gear G to be machined around the work gear G as a center and surrounds the work gear G to form teeth 3a having a large twist angle (see FIG. 6).
(See (b)), a vanishing gear 4 having teeth 4a with a small twist angle (see FIG. 6 (c)), and a pressure larger than the pressure angle of the teeth of the work gear G to be machined. And a vanishing gear 5 having angular teeth 5a (see FIG. 6D). Then, in such a burnishing device 1, the burnishing gears 3, 4,
5 is pressed against the work gear G to be machined, so that both end portions A and B of the tooth surface of the work gear G are burnished by the burnishing gears 3 and 4, and the tooth of the work gear G is toothed by the burnishing gear 5. The tip C is burnished to remove burrs and burrs generated on the work gear G.

In addition to the above, one vanishing gear having a larger pressure angle than the work gear G is swung in the vertical direction with respect to the work gear G, so that both side end portions A and B and tooth tips are formed. There is also a device for burnishing the part C (see FIG. 5).

[0005]

However, the conventional gear burnishing device as described above has the following problems. That is, the burnishing device 1 shown in FIG. 6 is provided with the three burnishing gears 3, 4, and 5, but these burnishing gears 3, 4, and 5 are included.
Since all of them are expensive, there is a problem that the equipment cost becomes high. Moreover, in order to press the vanishing gears 3, 4, and 5 against the work gear G while engaging them, a supporting mechanism such as a spindle and a pressurizing mechanism are required respectively, and these mechanisms are complicated and a plurality of sets are required. Since it is necessary, there is a problem that the equipment cost will increase accordingly.

Further, in the burnishing device having a mechanism for swinging the burnishing gear, since there is only one burnishing gear, in this respect, the burnishing device 1 (see FIG. 6).
Although the cost can be further reduced, the vanishing gear must be swung with high precision in order to ensure high processing accuracy, so the swing mechanism for swinging this is extremely complicated. However, there is a problem in that this hinders the reduction of equipment costs. The present invention has been made in view of the above points, and an object of the present invention is to provide a gear burnishing device capable of simplifying the mechanism and reducing the cost of equipment.

[0007]

The invention according to claim 1 is
A device for burnishing both end portions and tooth tips of a tooth surface of a work gear to be machined, the burnishing device including a burnishing gear and at least one of the work gear and the burnishing gear rotationally driven. And a pressurizing mechanism that presses one of the work gear and the burnishing gear toward the other, and the burnishing gear is defined by a twist angle of the work gear. A first burnishing tooth having a large twist angle, a second burnishing tooth having a twist angle smaller than the twist angle of the work gear, and a third burnishing tooth having a larger pressure angle than the work gear. It is characterized in that a predetermined number of burnishing teeth are formed on the same circumference.

The invention according to claim 2 is the vanishing device for a gear according to claim 1, characterized in that a fixing mechanism for restraining the movement of the work gear in the rotation axis direction is provided.

[0009]

According to the invention of claim 1, the burnishing device has a first burnishing tooth having a twist angle which is a certain amount larger than the twist angle of the work gear, and a twist angle which is a certain amount smaller than the twist angle of the work gear. The burnishing gear in which the second burnishing tooth and the third burnishing tooth having a larger pressure angle than the work gear are formed on the same circumference is provided. Then, at least one of the work gear and the burnishing gear is rotationally driven by the drive mechanism, and when either one of the work gear and the burnishing gear is pressed toward the other by the pressurizing mechanism, the work gear has the burnishing gear. The first, second, and third vanishing teeth of the tooth mesh with each other. At this time, both ends of the tooth surface of the work gear are burnished by the first and second burnishing teeth, and the tip of the tooth surface of the work gear is burnished by the third burnishing tooth. In this way, the tooth surface of the work gear can be burnished by the burnishing gear of the burnishing device. Also, since the first, second, and third burnishing teeth are formed on the same burnishing gear, only one set of burnishing gear and drive mechanism for driving this burnishing gear is required, and the mechanism of the device is greatly simplified. To be done.

According to the second aspect of the invention, the burnishing device is provided with a fixing mechanism for restraining the movement of the work gear in the direction of the rotation axis. For example, when processing a helical gear or the like, a force is generated between the work gear, that is, the helical gear and the first burnishing tooth of the burnishing gear, to move the work gear in the rotation axis direction. In such a case, the fixing mechanism can prevent the work gear from being displaced in the rotation axis direction.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings. Here, description will be made using an example in which a helical gear is used as a work gear. FIG. 1 shows an example of a gear burnishing apparatus according to the present invention. As shown in FIG. 1, the burnishing device 10 is roughly configured of a work holding unit 12 that holds a work gear G to be machined, and a machining unit 14 that includes a burnishing gear 13 for performing a burnishing process on the work gear G. Has been done.

The work holding unit 12 has a structure in which a spindle 16 extending in the vertical direction is rotatably provided on a carriage 15, and a work gear G is set on the spindle 16. ing. This dolly 15
Is equipped with slide bases 15a, 15a, ...
It is movable in the direction along the guide rail 15b (left and right in the figure). A pressurizing mechanism 17 such as a pneumatic cylinder, which is driven to expand and contract along the moving direction of the carriage 15, is installed on the side of the carriage 15. As a result, when the carriage 15 is pressed by the pressurizing mechanism 17 toward the processing portion 14, the work gear G is pressed against the burnishing gear 13 side.

Above the carriage 15, the spindle 1
There is provided a fixing mechanism 18 for fixing the work gear G set in No. 6 so as not to move in the rotation axis direction. The fixing mechanism 18 is composed of a bearing portion 19 that contacts the upper side surface of the work gear G, and a pneumatic cylinder 20 that pushes the bearing portion 19 downward.

On the other hand, the processing section 14 has a structure in which a spindle 23 which is rotationally driven by a drive motor 22 is provided on a base 21. And this spindle 2
3, a vanishing gear 13 is integrally provided at the same height as the work gear G set in the work holding portion 12. The drive motor 22 and the spindle 23 constitute a drive mechanism 24 for rotationally driving the burnishing gear 13.

As shown in FIG. 2, the burnishing gear 13
In order to burnish the work gear G, the first vanishing teeth (first vanishing teeth) 25, 25, ... Are formed at a predetermined pitch over 1/3 of the outer circumference of the work gear G, and the adjacent 1/3 The second burnishing teeth (second burnishing teeth) 26, 26, ... Are formed at a predetermined pitch over the circumference, and the third burnishing teeth (third burnishing teeth) 27, 27 ,. Is formed by.

The number of teeth of the first burnishing tooth 25, the second burnishing tooth 26, and the third burnishing tooth 27 is preferably equal to or more than the number of teeth of the work gear G to be machined. Of course, the first burnishing tooth 25, the second burnishing tooth 26, the third burnishing tooth 2
The number of teeth of 7 may be equal to or less than the number of teeth of the work gear G, but in this case, the number of teeth of the first burnishing tooth 25, the second burnishing tooth 26, and the third burnishing tooth 27 is set to the number of teeth of the work gear G. If it is not a divisor, the first burnishing tooth 25, the second burnishing tooth 26, and the third burnishing tooth 27 cannot be meshed with each tooth of the work gear G unless it is rotated many times. For this reason, there is a problem in that the processing efficiency at the time of burnishing is poor, the processing takes time, and the first burnishing tooth 25, the second burnishing tooth 26, and the third burnishing tooth 27 are quickly worn. Further, the first burnishing tooth 25, the second burnishing tooth 26, the third burnishing tooth 27 and the work gear G may have the same number of teeth, but in this case, the number of meshing teeth is the same regardless of how many rotations. Therefore, the burnishing effect of the work tooth surface where the first burnishing tooth 25 and the second burnishing tooth 26, the second burnishing tooth 26 and the third burnishing tooth 27, and the portion where the third burnishing tooth 27 and the first burnishing tooth 25 are respectively adjacent to each other are engaged. There is a problem that

As shown in FIG. 3A, each first burnishing tooth 25 has a tooth width larger than the tooth width of each tooth 28 of the work gear G to be machined, and is more predetermined than the tooth 28. It is formed with a large twist angle. Accordingly, when the first burnishing tooth 25 and the tooth 28 of the work gear G mesh with each other, the first burnishing tooth 25 has the side end portion B of the tooth surface 28a of the one tooth 28 adjacent to each other and the other tooth 2
It comes into contact with the side end A of the tooth surface 28'b of 8 '.

As shown in FIG. 3 (b), each second burnishing tooth 26 has a tooth width larger than the tooth width of each tooth 28 of the work gear G to be machined, and is more predetermined than the tooth 28. It is formed with a small twist angle. As a result, when the second burnishing tooth 26 and the tooth 28 of the work gear G mesh with each other, the second burnishing tooth 26 has the side end portion A of the tooth surface 28a of the one tooth 28 and the other tooth 2 which are adjacent to each other.
It comes into contact with the side end B of the tooth surface 28'b of 8 '.

As shown in FIG. 4, the third burnishing tooth 2
7 has a shape having a pressure angle larger than the pressure angle of each tooth 28 of the work gear G. As a result, when the third burnishing tooth 27 and the tooth 28 of the work gear G mesh with each other, the third burnishing tooth 27 has a tooth tip portion C of each tooth surface 28a, 28'b of the tooth 28, 28 'adjacent to each other. Will come into contact with.

Here, the burnishing gear 1 as described above is used.
When 3 is rotated in the direction indicated by reference numeral (d) in FIG. 3, a force for lifting the work gear G upward acts on the work gear G from the first burnishing gear 25 shown in FIG. 3 (a). On the other hand, from the second burnishing teeth 26 shown in FIG. 3B, a force that pushes down the work gear G acts on the work gear G. In this way, in response to the change in the force acting on the work gear G, the fixing mechanism 18 shown in FIG. 1 includes a pressure control mechanism (not shown) for controlling the pressing force of the pneumatic cylinder 20. ) Is provided.

Next, the operation of the burnishing device 10 having the above structure will be described. In order to perform the burnishing process on the work gear G by the burnishing device 10 shown in FIG. 1, first, the work gear G to be processed is set on the spindle 16 of the work holding unit 12. Then, the pneumatic cylinder 20 of the fixing mechanism 18 is extended and the work support gear G is pressed from above by the bearing portion 19 to fix it. Then, the pressurizing mechanism 17 presses the trolley 15 toward the processing section 14 to move the work gear G to the burnishing gear 13 of the processing section 14.
Engage while pressing on. Then, the drive motor 22 of the drive mechanism 24 rotationally drives the spindle 23 and the burnishing gear 13.

As shown in FIG. 2, when the work gear G and the burnishing gear 13 are engaged with each other while being pressed in this manner, for example, one revolution is performed, and each tooth 28 of the work gear G is burnished. The first burnishing tooth 25, the second burnishing tooth 26, and the third burnishing tooth 27 of the gear 13 are engaged with each other at least once. At this time, as shown in FIG. 3A, when each tooth 28 of the work gear G and the first burnishing tooth 25 mesh with each other, the first burnishing tooth 25 has a tooth surface of one tooth 28 adjacent to each other. 28a side end B and the other tooth 2
The side surface A of the tooth surface 28'b of 8'is pressed and the burrs and burrs generated on each side are removed. Also, FIG.
As shown in (b), when each tooth 28 of the work gear G and the second burnishing tooth 26 mesh with each other, the second burnishing tooth 26 has a side end portion of the tooth surface 28a of one tooth 28 adjacent to each other. A and the side end B of the tooth surface 28'b of the other tooth 28 'are pressed into contact with each other to remove burrs and burrs generated on each side. As a result, the first burnishing tooth 25 and the second burnishing tooth 26 burnish both side ends A and B of each tooth 28 of the work gear G shown in FIG. Furthermore, as shown in FIG.
When each tooth 28 of the work gear G and the third burnishing tooth 27 mesh with each other, the third burnishing tooth 27 is pressed against the tooth tip portion C of the work gear G to remove burrs and burrs that are generated there. . In this way, the vanishing gear 13 is rotated twice, for example, in one direction and then twice in the opposite direction, so that both side end portions of all the teeth 28 of the work gear G shown in FIG. 5 are rotated. A and B and the tooth tip portion C are burnished to remove burrs and burrs.

Since the work gear G to be machined is a helical gear, when the burnishing gear 13 is rotationally driven in the direction indicated by reference numeral (d) in FIG. 3, a force acting from the first burnishing tooth 25 causes A force is applied to the work gear G in the direction in which it is lifted in the direction of its rotation axis. However, since the work gear G is pressed downward by the fixing mechanism 18, the work gear G is processed in a state where it is securely fixed without rising.

In the burnishing device 10 described above, the first burnishing teeth 25 and the second burnishing teeth 26 for burnishing the side ends A and B of the work gear G,
The third burnishing tooth 27 for burnishing the tooth tip portion C is integrally formed on the same circumference of the burnishing gear 13. As a result, the work gear G is pressed against the burnishing gear 13 by the pressurizing mechanism 17, and the burnishing gear 13 is rotationally driven by the drive motor 22, so that both side ends A and B of the teeth 28 of the work gear G and the tooth tips are rotated. The portion C can be burnished to remove burrs and burrs. In this way, since the burnishing process can be performed with only one burnishing gear 13, only one set of the expensive burnishing gear 13 and the drive mechanism 24 for driving the burnishing gear 13 is required, and the burnishing gear 13 can be swung. The structure of the burnishing device 10 is greatly simplified because it does not need to be performed. Therefore, the facility cost can be significantly reduced, and the cost for burnishing the work gear G can be reduced accordingly.

Further, the burnishing device 10 is provided with a fixing mechanism 18. Accordingly, when the work gear G, which is a helical gear, is processed, it is possible to prevent the work gear G from being displaced in the rotation axis direction by the fixing mechanism 18, and to smoothly perform the burnishing process.

In the above embodiment, the fixing mechanism 18
Is composed of the pressure bearing portion 19 and the pneumatic cylinder 20, and the work gear G is pressed from above. However, if the work gear G can be fixed so as not to be displaced in the rotation axis direction thereof, The fixed structure is not limited,
For example, the work gear G may be chucked in the hole for inserting the rotary shaft. Also, burnishing gear 1
3 has been configured to be driven to rotate by the drive motor 22, but the work gear G may be driven to rotate. Similarly, the work gear G is pressed by the pressurizing mechanism 17 to the burnishing gear 1
Although it is configured to be pressed to the 3 side, the burnishing gear 13
May be pressed against the work gear G side. It is needless to say that the above-mentioned configuration may be any other than this without departing from the spirit of the present invention.

[0027]

As described above, according to the gear burnishing device of the first aspect, the first and second burnishing teeth for burnishing the side end portions of the tooth surfaces of the work gear, and the work gear. The third vanishing tooth for vanishing the tooth tip portion of the tooth surface is formed in the same vanishing gear. As a result, it is possible to simplify the mechanism of the device, since only one set of vanishing gear for vanishing both end portions and tooth tips of the work gear and the drive mechanism for driving the vanishing gear is required. As a result, the facility cost can be significantly reduced, and the cost for burnishing the work gear can be reduced.

According to the gear burnishing device of the second aspect, the burnishing device is provided with a fixing mechanism for restraining the movement of the work gear in the rotation axis direction. For example, when processing a helical gear or the like, when a force for moving the work gear in the rotation axis direction is generated between the work gear and the first burnishing tooth of the burnishing gear,
By the fixing mechanism, the work gear can be prevented from being displaced in the direction of the rotation axis thereof, and the tooth surface can be smoothly burnished.

[Brief description of drawings]

FIG. 1 is a front view showing an example of a gear burnishing device according to the present invention.

FIG. 2 is a plan view showing a burnishing gear and a work gear provided in the burnishing device.

FIG. 3 is a front cross-sectional view showing a meshing state between a work gear and a first burnishing tooth of a burnishing gear included in the burnishing device.

FIG. 4 is a plan view showing a meshing state of second burnishing teeth of a burnishing gear provided in the burnishing device and a work gear.

FIG. 5 is a perspective view showing a part of a work gear to be machined.

FIG. 6 is a view showing an example of a conventional gear burnishing device.

[Explanation of symbols]

 10 burnishing device 13 burnishing gear 17 pressurizing mechanism 18 fixing mechanism 24 drive mechanism 25 first burnishing tooth (first burnishing tooth) 26 second burnishing tooth (second burnishing tooth) 27 third burnishing tooth (third burnishing tooth) 28) Tooth A, B side end C Tooth tip G Work gear

Claims (2)

[Claims] 1. A device for burnishing both end portions and tooth tips of a tooth surface of a work gear to be machined, comprising:
The burnishing device includes a burnishing gear, a drive mechanism that rotationally drives at least one of the work gear and the burnishing gear, and a pressure mechanism that presses one of the work gear and the burnishing gear toward the other. The burnishing gear is provided with a first burnishing tooth having a twist angle larger than the twist angle of the work gear, and the burnishing gear is smaller than the twist angle of the work gear. The vanishing tooth of the gear is characterized in that the second vanishing tooth having the twist angle and the third vanishing tooth having the pressure angle larger than that of the work gear are formed on the same circumference by a predetermined number respectively. apparatus. 2. The gear burnishing device according to claim 1, further comprising a fixing mechanism for restraining movement of the work gear in the rotation axis direction.