JPH072127Y2 - Gear product positioning device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a gear having a tooth profile on the periphery thereof, for example, in order to improve the tooth profile accuracy of a preform formed by hot forging, it is set in a forging die and cold forged. In this case, the present invention relates to a gear product positioning device that positions a tooth profile of a preform and an orthodontic tooth of a forging mold so that they are accurately meshed with each other.

[0002]

2. Description of the Related Art When a gear preform is set in a forging die as described above, the tooth profile of the preform must be positioned so as to match the shaping teeth in the forging die. Conventionally, in a gear having a tooth profile with a chamfer for guiding, such as a reverse idle gear or a clutch gear, positioning is performed while checking the fit state of the chamfer portion of the preform and the shaping tooth with the feel of the hand. However, positioning was not easy with a gear without a chamfer.

[0003]

The fitting of the chamfer portion and the tooth-shaping tooth has only a slight difference in height between the chamfer portion, and therefore skill is required to accurately and quickly match them. Moreover, not only is it inefficient to rely on manual work, but it is particularly dangerous in forging dies, and there has been a demand for immediate automation.

[0004]

SUMMARY OF THE INVENTION The present invention is intended to improve workability by automating positioning, and is arranged on one side of a gear product having a tooth profile around it, and is arranged in the axial direction of the gear product. A pressure contact body that is movable and rotatable about its axis, and a gear receiver that is arranged on the other side surface side with respect to the gear product and whose contact surface with the gear product is rotatable about the axis. A gear product positioning device comprising a base and two or more positioning claws, which are provided at a tip end thereof with matching teeth matching the tooth profile of the preformed gear product, and which are advanced and retracted from the radial direction toward the center. is there.

[0005]

[Operation] If the pressure contact body is pressed against the gear product on the pedestal to rotate, and the positioning claws are advanced while they are rotating to engage the tooth profile with the meshing teeth, the gear product will be split to the correct position. The gear product is automatically positioned by being ejected and retracting the positioning claw.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a gear product positioning device according to the present invention is incorporated into a cold forging die and a punch will be described with reference to the drawings. Reference numeral 1 is a main punch. The main punch 1 is moved up and down by a driving means (hydraulic mechanism) not shown, and has a recess 2 on the lower pressing surface side. An implant screw 3 is provided in the recess 2 so as to protrude downward from the center of the bottom surface thereof. The implant screw 3 has a movable ring urged downward by a spring 4 in the recess 2. A movable bearing 6 is interposed between the movable ring 5 and the inner peripheral surface of the recess 2. On the tip side of the implanting screw 3, a rotary bearing 8 which is a pressure contact body is attached so as to be freely rotatable by interposing a conductive bearing 7 between it and the movable ring 5. Then, the rotary punch 8 is fitted with a fitting protrusion 10 that matches the shaft insertion hole 9a of the preformed gear product 9.
Is provided.

Reference numeral 11 denotes a die, which is formed in the center of the die, and from the center of the bottom surface of the upsetting recess 12 provided with the shaping teeth 12a along the inner circumference of the bottom, an ejector 13 which serves as a receiving stand for the gear product 9 is formed. Are equipped so that they can appear and disappear. The ejector 13 is mounted on the upper surface of the rotary disk 13 by bearings 14.
a is supported, and positioning claws 15, 15, 15 are provided on the upper surface of the die 11 along the upper surface of the die 11 so as to slide in three radial directions. Positioning claw 15
As shown in FIG. 2, the tooth profile 16 of the gear product 9 is attached to the tip.
The meshing teeth 17 that correspond to 3 are provided for each of the three teeth. The positioning claws 15, 15, 15 are interlocked with the lifting operation of the main punch 1, and are moved up to the tooth profile 16 position of the gear product 9 set on the rotary disk 13a of the ejector 13 by hydraulic pressure, a cam or a link mechanism. The positioning claws 15, 15 and 15 are designed to be advanced and retracted to the outside of the upsetting recess 12, and in order to avoid interference with the main punch 1, a downward clearance is set.

The die 1 for cold forging thus formed
1 and the punch 1, first, the positioning claws 15, 15, 1
Gear product 9 with 5 meshing teeth 17 set
When the gear product 9 is evacuated from the position where it meshes with the tooth profile 16 of FIG. The gear product 9 is pressed against the upper surface and sandwiched by the rotary disk 13a (FIG. 4). Main punch 1
When is further lowered, the movable ring 5 is rotated by the pressing action to compress the spring 4. Between the movable ring 5 and the rotary punch 8, a means for generating a frictional force sufficient to rotate the rotary punch 8 is provided, and the rotary punch 8 is rotated by the rotation of the movable ring 5. Followed rotation. Therefore, when the positioning claw 15 is advanced, the tooth profile of the gear product 9 rotating by the movable ring 5 and the meshing tooth 17 of the positioning claw 15 mesh with each other to stop the rotation of the gear product 9 (FIGS. 5 and 8). ). Positioning claw 15 here
When the ejector 13 is lowered, the gear product 9 is sandwiched between the main punch 1 and the turntable 13a, and is positioned inside the upsetting recess 12 (guided to the gear product 9). The tooth profile 16 is accurately meshed with the shaping tooth 12a (FIG. 7).

In the above embodiment, the positioning claws are provided in three radial directions, but the number of positioning claws is not limited as long as it is two or more, and the number of meshing teeth is also limited. It can be set freely. If the tooth profile of the gear product has a chamfer, the positioning claw can be advanced first, and the positioning can be performed by the interaction between the rotary punch and the positioning claw. Although the above embodiment is incorporated into a die and a punch for cold forging, the incorporated device may be any other device as long as it is necessary to position the gear product, and in the case of transfer, A station dedicated to positioning is provided before molding,
It is also possible to place a single machine dedicated to positioning there.
Further, as for the structures of the pressing body and the pedestal, the rotating means is not limited to the embodiment as long as it is rotatable, and it may be used in combination with the conventional mechanism.

[0010]

According to the present invention, the gear product on the pedestal is pressed and rotated by the pressing body, and the positioning pawl is advanced during the rotation, so that the tooth profile and the positioning pawl of the gear car product having a height difference Since it can be positioned reliably by meshing with the meshing teeth of, high reliability,
Efficient automatic positioning can be achieved even with gear products that do not have chamfers.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a positioning device according to the present invention.

FIG. 2 is an explanatory diagram showing an arrangement of meshing teeth.

FIG. 3 is an explanatory diagram showing the operation of the positioning device.

FIG. 4 is an explanatory view showing the operation of the positioning device.

FIG. 5 is an explanatory view showing the operation of the positioning device.

FIG. 6 is an explanatory view showing the operation of the positioning device.

FIG. 7 is an explanatory diagram showing the operation of the positioning device.

FIG. 8 is an explanatory diagram illustrating a meshing state between a tooth profile and meshing teeth.

[Explanation of symbols]

1 ... Main punch, 2 ... Concave, 3 ... Implant bolt, 4 ... Spring, 5 ... Movable ring, 6 ... Movable bearing, 7 ... Conduction bearing, 8 ... Rotating punch, 9 ...・ Gear products, 10 ・ ・ Injection protrusions, 11 ・ ・ Dies, 12 ・ ・ Upsetting recesses, 13 ・ ・ Ejectors, 13a ・
・ Turning table, 14 ・ ・ Bearing, 15 ・ ・ Positioning claw,
16 ... Tooth profile, 16a ... Chamfer, 17 ...

Claims (1)

[Scope of utility model registration request] 1. A pressure contact body, which is arranged on one side of a gear product having a tooth profile on the periphery, is movable in the axial direction of the gear product, and is rotatable about the shaft, and the gear. A gear pedestal that is arranged on the other side of the product and has a contact surface with the gear product that is rotatable about the shaft, and a meshing tooth that matches the tooth profile of the preformed gear product at the tip. A gear product positioning device that is equipped with two or more positioning claws that are provided and that advance and retract from the radial direction toward the center.