JPH0224580Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Purpose of the Invention Industrial Application Field This invention relates to a shaving device that heat-treats the teeth of a gear that has been cut and then shaves the teeth.

Conventional Technology For example, for gears used in automobile power transmission systems, teeth are usually cut from a material with a gear cutting machine, and then finished with a shaving device.
After shaving, heat treatment is applied to harden the teeth.

However, in the above method, the gear teeth are shaved before being heat treated, so even if the gear teeth are finished with high precision by shaving, thermal distortion occurs during heat treatment, and the gear teeth are formed with the distortion taken into account in advance. Even with repeated use, deformation occurred and the accuracy of the teeth deteriorated.

Therefore, when highly accurate teeth were required, the teeth were finished by grinding after heat treatment. As a result, the number of man-hours required for manufacturing increases, resulting in poor mass production and high costs.

On the other hand, in recent years, in order to improve the driving performance of automobiles, various gears used in power transmission systems are required to have high precision, and a method for mass-producing high-precision gears has become necessary.

The method of mass-producing high-precision gears is to cut teeth from the material using a gear cutting machine, then heat-treat the teeth to harden them, and then shave the hardened teeth to form a high-precision finish. There is a way. With this method, distortions caused by heat treatment are corrected by shaving, resulting in highly accurate teeth.
Furthermore, it is highly mass-producible and can reduce manufacturing costs.

However, since the above method involves shaving hardened gear teeth, a normal shaving cutter cannot perform the process, so a diamond shaving cutter with diamond electrodeposited on the surface of the cutting edge is used. The shaving cutter is firmly and integrally connected to the arbor of the shaving device, and the cutting edge of the diamond shaving cutter and the teeth of the gear are engaged with each other for processing.

Problems that the invention aims to solve: In conventional shaving devices, the diamond shaving cutter is integrally and firmly attached to the arbor, so when the incisors of the diamond shaving cutter mesh with the teeth of the gear, a large collision occurs. It was making noise and causing noise.

In addition, since the cutting blade and teeth are brought into contact with high pressure, stress is concentrated on the contact surface between the two, and the diamond electrodeposited on the surface of the cutting blade peels off in a short period of time, making shaving impossible and requiring replacement of the cutter. The problem was that it became more complicated and the running cost increased.

In order to solve the above problems, the diamond shaving cutter is configured to be movable in the radial direction, and a cushion rubber is interposed between the diamond shaving cutter and the arbor to provide elastic support. There is.

However, even with the above configuration, if the diamond shaving cutter is only elastically supported by the cushion rubber, when the diamond shaving cutter moves in the radial direction, the strong reaction force of the cushion rubber will be applied to the diamond shaving cutter. This causes the diamond shaving cutter to resonate, making it impossible to perform high-precision machining.

B. Means for solving the structural problems of the invention This invention forms a connecting flange extending radially on the main shaft and one peripheral edge, and diamonds are formed on the surface of the arbor connected to the main shaft and the cutting edge on the outer periphery. a diamond shaving cutter electrodeposited and attached to the outer circumferential surface of the arbor with an appropriate gap; a pair of support members attached to the outer circumference of the arbor and sandwiching the diamond shaving cutter from both sides; , a stopper coupled to the outer periphery of the arbor, a stopper pin passing through the diamond shaving cutter and the pair of support members and coupling the coupling flange of the arbor to the stopper, a side surface of the diamond shaving cutter and the stopper A cushion rubber is provided between the diamond shaving cutter and the support member through an annular groove formed in at least one of the diamond shaving cutter and the support member, and the cushion rubber is provided between the inner circumferential surface of the diamond shaving cutter and the arbor. Only a high viscosity liquid such as silicone oil is filled between the outer peripheral surface and the outer peripheral surface.

With the above holding structure, during processing, the axial movement of the diamond shaving cutter is regulated by the cushion rubber, and the radial movement is regulated by a high viscosity liquid, and a strong impact is applied to the diamond shaving cutter. Even if the high viscosity liquid moves,
The impact is absorbed and alleviated, no strong reaction force acts on the diamond shaving cutter, the cutter does not resonate, and high-precision machining can be performed. Furthermore, since the cushion rubber seals between the diamond shaving cutter and the support member, leakage of highly viscous liquid will not occur.

Embodiment FIG. 1 is a drawing showing an embodiment of the present invention, in which 1 is the main shaft of the shaving device, 2 is an arbor for attaching a cutter fitted to the main shaft 1, and a key groove 3 is provided on the inner peripheral surface. is formed and is keyed to the main shaft 1. As shown in FIG. 2, this arbor 2 has a connecting flange 4 integrally formed at one end thereof extending in a direction perpendicular to the axial direction, and a floating groove 5 formed all around the center of the outer peripheral surface. be. Further, the coupling flange 4 is provided with a plurality of female threaded holes 6, 6, . be.

8 is a diamond shaving cutter (hereinafter simply referred to as a cutter) which is attached to the arbor 2 in a floating state.As shown in Fig. 3, a large number of cutting edges 9, 9... are carved on the outer circumference, Diamonds are electrodeposited on the surfaces of 9, 9, . . . , and splines 10, 10, . . . are carved on the inner peripheral surfaces. The inner diameter of the splines 10, 10 is made to match the diameter of the outer circumferential surface of the arbor 2, and the length in the axial direction is formed to be slightly shorter than the length of the floating groove 5, so that the cutter 8 is connected to the floating groove 5. are arranged to face each other with a small gap 11 around them. The cutter 8 also has a plurality of annular grooves 12 with different diameters on both sides,
12..., 13, 13... are formed concentrically, and each annular groove 12, 12..., 13, 13... has an annular cushion rubber 1 whose diameter matches the respective diameter.
4, 14..., 15, 15... are inserted and bonded.

Reference numerals 16 and 17 denote a pair of support members that hold the cutter 8 from both sides, and as shown in FIG. 4, cushion rubbers 14, 14, .
..., 15, 15..., annular groove 18, 1
9, and inner flanges 20a, 21a and outer flanges 20 of the annular grooves 18, 19.
V grooves 22a, 23a, 22b, 23 in b, 21b
b is formed. Also, support members 16, 17
The inner diameter is made to match the outer diameter of the arbor 2 and the inner diameter of the cutter 8.

The support members 16, 17 are made of cushion rubbers 14, 14, 15, 15, .
are accommodated in the annular grooves 18, 19, and the flanges 20a, 20b, 21a, 21b are slidably in contact with the side surface of the cutter 8, and are bonded to the cushion rubbers 14, 14..., 15, 15... Glued with adhesive. Therefore, the support members 16, 17 and the cutter 8 are made of cushion rubber 14, 14..., 15,
15, which are integrally connected to each other so as to be relatively movable in the radial direction, but not movable in the axial direction.

The cutter 8 and the support members 16, 17 are assembled using a suitable assembly jig 24 so that their center lines coincide, as shown in FIG. As shown in FIG. 5, the assembly jig 24 has a shaft portion 24a having an outer diameter that matches the inner peripheral surfaces of the cutter 8 and the support members 16, 17, and has a shaft portion 24a at one end of the shaft portion 24a. The flange 24b is assembled at right angles to the shaft portion 24a.
was formed. When assembling, the cutter 8, a pair of cushion rubbers 14, 14..., 15, 15..., and a pair of support members 16, 17 are fitted to the shaft portion 24a of the assembling jig 24, and the assembling flange 24b is fitted. Press to the side, each member 8, 1
4, 14..., 15, 15..., 16, 17 are aligned and joined together.

A stopper 26 is composed of a cylindrical portion 26a and a fastening flange 26b perpendicular to the cylindrical portion 26a.
a into the arbor 2, and the fastening flange 26b
are brought into contact with the support member 17, and the support members 16, 17 and the cushion rubbers 14, 14..., 15, 15...
..., clamps the cutter 8. The stopper 26 and the arbor 2 are connected by a key 27.

28 is a stopper pin that sets the distance between the connecting flange 4 of the arbor 2 and the stopper 26;
Small-diameter male screw portions 29 and 30 are integrally formed at both ends of 8a.

The axial length of the shaft portion 28a of the stopper pin 28 is determined to be the sum of the axial thicknesses of the cutter 8 and the support members 16 and 17. This stopper pin 28 has one male screw portion 29 screwed into the female screw hole 6 formed in the coupling flange 4 of the arbor 2, and the cutter 8 and cushion rubber 1 are attached to the shaft portion 28a.
4, 15, insert the support members 16, 17,
The other male screw part 30 is passed through the through hole 31 formed in the fastening flange 26b of the stopper 26, and the nut 32 is tightened at the end thereof to adjust the distance between the joining flange 4 and the fastening flange 26b.
and support members 16 and 17 are clamped and fixed.
A plurality of stopper pins 28 are provided at the same circumferential position in correspondence with the female screw holes 6, 6, . . . formed in the connecting flange 4 of the arbor 2.

33 is a blind plug screwed onto the oil injection holes 7, 7 provided in the arbor 2, and from the oil injection holes 7, 7 to the floating groove 5 of the arbor 2 and the inner peripheral side splines 10, 10 of the cutter 8... The silicone oil 34 filled in between is sealed. The silicone oil 34 filled between the floating groove 5 of the arbor 2 and the cutter 8 improves the support rigidity of the cutter 8 and prevents resonance due to deflection during shaving to prevent the amplitude of deflection in the radial direction from increasing. do.

The shaving device having the above structure meshes the cutting blades 9, 9, etc. of the cutter 8 with the teeth of the hardened gear, rotates the main shaft 1 in this state, and cuts the cutter through the arbor 2, stopper 26, and stopper pin 28. 8 is rotated, and the teeth of the gear are shaved with the cutting blades 9, 9, . . . of the cutter 8 for finishing processing.

During the shaving process, if the contact pressure between the teeth and the cutting blades 9, 9 becomes abnormally high due to an error in the tooth profile of the gear teeth, the cutter 8 will be damaged by the cushion rubbers 14, 14, etc.
..., 15, 15... and the silicone oil 34 while moving slightly in the radial direction to correct the contact pressure between the teeth and the cutting edges 9, 9... to a constant pressure and perform shaving.

In addition, splines 10, 10 are provided on the inner peripheral surface of the cutter 8.
. . . is formed, but this is to increase the holding power of the silicone oil 34 during rotation, and the shape and quantity thereof may be arbitrarily selected. Moreover, although the silicone oil 34 is filled between the floating groove 5 of the arbor 2 and the cutter 8, it is not limited to the silicone oil 34, but any other suitable high viscosity liquid may be filled.

C. Effect of the invention This invention holds the cutter in a floating state on the outer peripheral surface of an arbor that is rotated by a main shaft, and the cutter is held between support members from both sides via cushion rubber, and between the cutter and the arbor. By enclosing a highly viscous fluid such as silicone oil into the
The cutter is supported, and if the contact pressure between the teeth and the cutting edge becomes excessively high when the gear teeth and the cutter engage, or due to a tooth profile error during shaving, the cutter moves in the radial direction, causing the cutter to move in the radial direction. Electrodeposited on the surface of the cutting blade because it absorbs and alleviates shock through movement and corrects the contact pressure between the gear teeth and the cutter blade to a constant pressure without causing resonance as it does not generate a reaction force. Does not cause diamond peeling. Moreover, the katsuta is supported by cushion rubber from both sides.
Since the cutter exerts a force in the shear direction on the cutter rubber, the reaction force against movement in the radial direction is not a problem, and the cutter can restrict movement in the axial direction without causing resonance, and has a high viscosity. The fluid presses the entire inner circumferential surface of the cutter evenly, supporting the cutter with high rigidity, preventing it from tilting, and maintaining a normal meshing state between the gear and cutting teeth, allowing for highly accurate machining. Furthermore, since the cushion rubber seals between the cutter and the support member, leakage of highly viscous fluid will not occur.

In addition, by filling the gap between the arbor and the cutter with a highly viscous liquid such as silicone oil, the movement of the liquid within the gap absorbs shock and stress, resulting in an appropriate contact force of the cutting blade without reaction force. .

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the shaving device according to the present invention, Fig. 2 is a sectional view of the arbor, Fig. 3 is a sectional view of the cutter, Fig. 4 is a sectional view of the support member, and Fig. 5 is a sectional view of the shaving device according to the present invention.
The figure is a sectional view showing a state in which the cutter and the support member are assembled. 1...Main shaft, 2...Arbor, 5...Floating groove, 8...Cut, 9...Cutting blade, 10...
Spline, 14, 15...Cushion rubber, 1
6, 17...Support member, 26...Stopper,
28...Stotsupapin.

Claims (1)

[Scope of utility model registration request] forming a connecting flange extending in the radial direction on one peripheral edge of the main shaft, electrodepositing diamond on the surface of the arbor connected to the main shaft and the cutting edge on the outer periphery;
a diamond shaving cutter attached to the outer circumference of the arbor with an appropriate gap; a pair of support members attached to the outer circumference of the arbor and sandwiching the diamond shaving cutter from both sides; a stopper coupled to the outer periphery; a stopper pin passing through the diamond shaving cutter and the pair of support members and coupling the coupling flange of the arbor to the stopper; and a side surface of the diamond shaving cutter and the support member. A cushion rubber is provided between the diamond shaving cutter or the support member through an annular groove formed therebetween, and the inner circumferential surface of the diamond shaving cutter and the outer circumferential surface of the arbor are connected to each other. A shaving cutter holding structure characterized by only high viscosity liquid such as silicone oil being filled in between.