JPS59209446A - Method for rolling tooth profile of spur gear by working while relieving residual strain - Google Patents

Abstract

PURPOSE:To eliminate defect owing to a residual strain by heating the required part of a blank material for a spur gear to a specific temp., working axially the material by a boat-shaped tool and generating a tooth profile while relieving the residual strain. CONSTITUTION:A blank material 2 for a spur gear is heated from the outside circumference at the end face thereof toward the central part by a heater 1 and the material 2 is moved in an arrow 8 direction then the end face on the outside circumferential surface of the material 2 bites into the bow part of a boat- shaped tool 3. When the number of teeth is indexed and a switch of a motor is turned on, the tool 3 and the material 2 rotate. When the working ends, the temp. of the material 2 decreases during the working and therefore the material 2 is moved while the material is heated further by the heater 1 in an arrow 8' direction. The material 2 is removed from a center 5. Since stress remains in the material 2 on decreasing of the temp. during the working, the material is again heated to 600-650 deg.C and is removed from the machine. The material is placed as it is in a prescribed position and is released after the temp. of the material is restored to an ordinary temp.

Description

[Detailed description of the invention] Conventional technology Various methods have been used for rolling spur gears since ancient times. Closing method Force ≦ Often used.Also, 12E in which the spur gear tool and the spur gear material are in mesh with each other.
There are other methods, and in either case, a compressive force is applied from the outer periphery of the spur gear material toward the center, creating residual stress on the teeth. For that reason, the processed spur gear material is polished as well as heat treated, so when heat is applied, there is a difference in the pitch between the created teeth due to residual stress inside the spur gear material. , the polishing method is no longer available, resulting in defective products.

Solution: The present invention has been improved to eliminate these deficiencies and incorporates novelty. In the above-mentioned rolling method, compressive force is applied from the outer periphery toward the center of the spur gear material.In contrast, in the present invention, the spur gear material is processed from the beginning by high-frequency heating, gas burner, etc. , maximum 600゛~650
This is a tooth profile rolling method for spur gears in which the material is heated to about 100°C and gradually finished while removing the stress caused by the application (-) in the axial direction of the spur gear material using a boat-shaped tool.

To clarify the drawings of the embodiment, Figure 1 (1) shows the heating device (2) shows the spur gear material (3) shows the boat-shaped gear 4) shows the support rod (5) shows the center that supports the support rod (Both ends) (6
) Arrow (7) indicates the rotation direction of the boat-shaped gear material. Arrow (8) indicates the forward direction of the spur gear material. (8)' indicates the backward movement of the gear material. Arrow (9) is a regular tooth profile! IO) is the selling part.The flat tooth filling material (2) is set on the support rod (4), and is supported by a neck that supports the support rod (5).

The heating device shown in Figure 1 (1) heats the stopped spur gear material shown in (2) from the outer periphery of the end face toward the center I.
) If you move the spur gear material in (2) in the direction of the arrow, (
When the outer peripheral end surface of the spur gear material of (2) is bitten by the selling part of the boat-shaped tool (button) of tool 1), the number of teeth is determined and the electric motor is switched on. The spur gear material in 2) begins to rotate. When the machining of the set number of materials for the spur teeth 111 in (2) is completed, the materials for the spur teeth in (2) are added to the materials in 1. Since the temperature is decreasing throughout the interior, the heating device (1) further increases the temperature in the direction of the arrow (8).
The spur gear material in (2) is moved while being heated and returned to its initial position, and the operation of the heating device in (1) is stopped. (
Remove the spur gear material (2) from the center of (5). As mentioned above, the temperature of +2+ spur gear material decreases during processing and stress remains, so heat it again to 600° to 650° and remove (2) spur gear material from the machine. Place it in the specified position and unset it after the temperature returns to room temperature. Next, set another new spur gear material (2) into the machine and start work as described above.

[Brief explanation of the drawing]

Figure 1 shows an embodiment of the rolling method according to this invention.
The second perspective view is 1. The top view of the tool, the third figure, is 1.

Claims (1)

[Claims] In the present invention, the necessary parts of the spur gear material are
After heating the material to a degree of 100°, the spur gear material is
A tooth profile rolling method for spur gears that creates the tooth profile of a spur gear while applying force in the axial direction and removing residual stress.