JP4121930B2 - Manufacturing method of shaving cutter - Google Patents

Description

  The present invention relates to a method for manufacturing a shaving cutter, and more particularly, to a method for manufacturing a shaving cutter that achieves the effect of tooth root clearance by superimposing two involutes at a specified position.

A traditional gear cutting tool performs creation gear cutting with a workpiece and a tool, first half-processes with a worm-shaped hob, and then performs precision gear cutting with a gear-shaped shaving cutter. FIG. 1 shows the outline of a traditional shaving cutter. This shaving cutter 10 has a disk-shaped main body 11, teeth 12 are provided on the outer periphery of the main body 11, and tooth grooves 13 are provided between the two teeth 12. The formation of the tooth gap 13 includes two steps of drilling and gear cutting. As shown in FIG. 2, first, a hole 131 is formed by drilling a certain distance portion of the main body 11, and the position and size of the hole 131 are determined by the actual standard of the hob. After completing the drilling process of the main body 11, a hob (not shown) symmetrically cuts the involutes L1 and L2 on both sides of the center of the hole 131 to form the side 121 of the tooth 12, and the hole 131 opens the tooth bottom. Achieve the escape effect of 123. Since the traditional process is divided into two steps, drilling and gear cutting, it has the following disadvantages.
1. The diameter d1 of the hole 131 is larger than the distance d2 between the roots of the teeth 12, thereby forming a relatively thin neck 122 on the teeth 12, and the presence of the neck 122 reduces the strength of the teeth 12, Easy to be cut.
2. After the drilling of the main body 11 is completed and transferred to the gear cutter, accurate positioning cannot be performed unless alignment is performed, which takes time and effort.
3. Drilling and gear cutting machines must be installed, equipment costs are high and space is required.
4). The volume of the main body 11 is large and heavy, and it is very inconvenient to carry it up and down between the punching machine and the gear cutter. It takes manpower and time, and the main body is easily damaged by a collision.

  In view of the shortcomings of known techniques, the main object of the present invention is to provide a kind of method for manufacturing a shaving cutter, which consists of forming a tooth by polymerizing an involute on the shaving cutter to form a tooth root groove. Can be formed.

  Another object of the present invention is to provide a method for manufacturing a shaving cutter that can increase the strength of teeth and prevent cutting.

  Another object of the present invention is to provide a method of manufacturing a shaving cutter that can eliminate the drilling step and eliminate the equipment cost and occupied space of the drilling machine.

  Yet another object of the present invention is to eliminate the drilling process, complete the gear cutting process on a single gear cutter with respect to the shaving cutter body, and form a precise root groove with a single alignment. The object is to provide a method for manufacturing a shaving cutter.

  Still another object of the present invention is to provide a shaving cutter that eliminates the drilling process, completes the root groove forming process on the shaving cutter body on a single gear cutter, and saves labor and time for transportation. It is to provide a manufacturing method.

According to the first aspect of the present invention , a specified position point is set on an involute to be cut into the shaving cutter body, and a gear cutting tool is formed along another involute that intersects the involute at a smaller pressure angle than the involute at the specified position point. The shaving cutter body is chopped and cut, whereby two involutes and a root groove are formed around the shaving cutter body to form a tooth groove made of trochoid, thereby forming a relief effect of the root. It is with the manufacturing method of the shaving cutter.

In summary, the method for manufacturing a shaving cutter according to the present invention has the following advantages by designing a tooth with two involutes that intersect at a designated position point.
1. The drilling process can be omitted, thereby eliminating the equipment cost and occupied space of the drilling machine.
2. The strength of the teeth 32 can be increased, and the neck 322 can be prevented from being cut.
3. The root groove forming process can be completed with respect to the main body 31 with a single gear cutter, and a precise shaving cutter can be manufactured by a single alignment.
4). Since the gear cutting process can be completed on the body 31 of the shaving cutter on a single machine, labor and time for transportation can be saved.

According to the present invention, a method for manufacturing a shaving cutter comprises preparing a main body and a gear cutting tool to be cut, setting two involutes that intersect with each other at one specified position point, and first, a gear cutting tool in viewing write cut into them the body of one of the involute as starting cutting path, even if the end cutting path involute one cormorants, cut to the body center side than the specified location points, thereby forming a tooth bottom groove consisting trochoid and To achieve the effect of tooth bottom relief.

FIG. 3 is an explanatory diagram of the design principle of the present invention. First, to set the reference circle 21, 22 and different radii of two concentric, to pull out an involute L3, L4 that crossing two mutually than the outer diameter of the two reference circle 21. The two reference circle 21 and 22 when being installed in a main body 20 hypotheses Then, write off the body 20 along different involute L3, L4 in the tool Meba, interlaced involute L3, L4 main body 20 Formed. This differs from the traditional method of manufacturing teeth with a single involute.

As further shown in FIG. 4, based on the design principle described above, first set the involute L5 as starting cutting path, as well as to set the designated position point P on the involute L5.

Subsequently, with the involute L 6 having a smaller pressure angle than the involute 5 as an end cutting path , the main body is cut by cutting along the two involutes L 5 and L 6 that intersect each other at the specified position point P with a gear cutting tool. The tooth bottom groove 331 shown in FIG. 5 forms a tooth groove made of trochoid . Distance d4 distance d3 and the tooth bottom Mizonodo portion 323 of Hasokomizo 331 is substantially the same, thereby the neck 322 of the teeth 32 formed on both sides of the tooth bottom groove 331 also becomes TairaTadashi, duplicate By performing the cutting operation, as shown in FIG. 6, teeth 32 and tooth grooves 33 are formed around the disk-shaped main body 31, and a complete shaving cutter 30 is completed.

It is a top view of the structure of a known shaving cutter. It is a top view of the tooth bottom hole drilling structure of a known shaving cutter. It is a design principle display diagram of the present invention. It is a superposition | polymerization display figure of two involutes of the shaving cutter of this invention. FIG. 3 is a diagram showing a formation of a tooth bottom groove of the shaving cutter of the present invention. It is a concrete shaving cutter structure display figure of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Shaving cutter 11 Main body 12 Tooth 121 Side edge 122 Neck part 123 Tooth base 13 Tooth groove 131 Hole 20 Main body 21, 22 Reference circle 30 Shaving cutter 31 Main body 32 Tooth 321 Side 322 Neck part 323 Tooth groove throat 33 Tooth groove 331 Hasokomizo d1 diameter d2, d3, d4 distance L1～L 6 involute
L7 Trochoid P Specified position point

Claims (1)

A specified position point is set on the involute to be cut into the shaving cutter body, and the shaving cutter body is toothed with a gear cutting tool along another involute that intersects the involute at a smaller pressure angle than the involute at the specified position point. A method for manufacturing a shaving cutter, characterized in that cutting is carried out to form a tooth groove comprising two involutes and a root groove made of trochoid around the shaving cutter body, thereby forming a relief effect of the bottom of the tooth.

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