CN216263904U

CN216263904U - Indexable Gralison spiral bevel gear milling cutter

Info

Publication number: CN216263904U
Application number: CN202122652862.0U
Authority: CN
Inventors: 黄鑫; 杨永德
Original assignee: Harbin Shanna Tool Manufacturing Co ltd
Current assignee: Harbin Shanna Tool Manufacturing Co ltd
Priority date: 2021-11-02
Filing date: 2021-11-02
Publication date: 2022-04-12
Anticipated expiration: 2031-11-02

Abstract

An indexable Gralison spiral bevel gear milling cutter. It relates to a spiral bevel gear machining tool. The tool solves the problems that a traditional high-speed steel material tool is easy to wear or burn and even difficult to process when processing a workpiece HB 280-350, and the tool is troublesome to mount and dismount by using a high-speed steel blade and expensive in form of making the whole hard alloy. The utility model consists of a cutter body, an indexable hard alloy blade and a blade fixing screw. The utility model fully utilizes the technology of hard alloy and indexable hard alloy, and has the advantages of simple structure, reliable installation, convenient blade installation and disassembly, low cost, high efficiency and the like.

Description

Indexable Gralison spiral bevel gear milling cutter

Technical Field

The utility model relates to a spiral bevel gear machining cutter, in particular to an indexable Gralison spiral bevel gear milling cutter.

Background

At present, the blade material of the processing cutter of the Gleason spiral bevel gear adopts high-speed steel, and the whole cutter block is the integral structure form of the high-speed steel, the structure is complex, nowadays, because the hardness of the gear blank is improved to HB 280-350 or even higher from original HB 170-220, therefore, the problem that the cutter processing Gleason spiral bevel gear of the existing high-speed steel material is easy to be worn or burnt or even can not be processed appears, the price cost of the cutter made into integral hard alloy is too high, and the cutting linear velocity of the high-speed steel material is 30-50 m/min, the processing efficiency is low, so the cost performance is high and the cutter with higher processing linear velocity is urgently needed to be replaced.

SUMMERY OF THE UTILITY MODEL

The utility model provides an indexable Grarison spiral bevel gear milling cutter, aiming at solving the problems of high processing difficulty and low efficiency of a traditional high-speed steel material cutter after the hardness of a workpiece is improved, and the technical scheme for solving the problems is as follows:

the utility model relates to an indexable Grarison spiral bevel gear milling cutter, which consists of a cutter body, indexable hard alloy blades and blade fixing screws, wherein the cutter body is of a concave circular integral structure, the cutter body is provided with cutter grooves of the indexable hard alloy blades, screw holes are formed in the cutter grooves, the indexable hard alloy blades are staggered on the inner side and the outer side of the cutter body, one end of each indexable hard alloy blade is lapped on the circumference of the end surfaces of the inner side and the outer side of the cutter body, inclined screw holes are formed in the indexable hard alloy blades, the indexable hard alloy blades are arranged in the cutter grooves, and the indexable hard alloy blades are fastened on the cutter body by the blade fixing screws through the inclined screw holes;

the middle positions of the left end part and the right end part of the indexable hard alloy blade are provided with steps, the fall is 0.05-0.2 mm, the left end circular arc part and the right end circular arc part of the indexable hard alloy blade are designed into an outer cutter part and an inner cutter part, the included angle of the inclined edges of the outer cutter part and the inner cutter part at the left end circular arc part and the right end circular arc part of the indexable hard alloy blade is different by theta, and the fillet Rx of the outer cutter part is equal to the fillet Ry of the inner cutter part.

The indexable Gleason spiral bevel gear milling cutter is developed by combining the Gleason spiral bevel gear machining technology and the indexable hard alloy technology, a workpiece with the hardness of HB 280-350 and even higher hardness can be machined by adopting the indexable hard alloy blade, the outer cutter part and the inner cutter part are arranged on the same blade, the hard alloy raw material is saved, the structure is simple, the installation is reliable, the assembly and disassembly are convenient, the precision is high, a large amount of cutter cost is saved for a user, and meanwhile, the machining efficiency is greatly improved.

Drawings

Fig. 1 is a schematic structural view of the present invention, fig. 2 is a right side view of fig. 1, fig. 3 is an overlapping view of a normal tooth form of an inner and outer indexable cemented carbide insert of fig. 1, fig. 4 is a front view of the 2 indexable cemented carbide insert of fig. 1, fig. 5 is a top view of fig. 4, fig. 6 is a top view of fig. 5, fig. 6 is a right side view of fig. 4, fig. 7 is a 3D view of the 2 indexable cemented carbide insert of fig. 1, fig. 8 is a 3D view of fig. 7 rotated 180 degrees, fig. 9 is an enlarged view of an outer blade portion and an inner blade portion at left and right end portions of the indexable cemented carbide insert, and fig. 10 is a schematic structural view of a cutter body of fig. 1.

Detailed Description

The first embodiment is as follows: this embodiment will be described with reference to fig. 1 and 2. The rotary cutter comprises a cutter body 1, a rotary hard alloy blade 2 and a blade fixing screw 3, wherein the cutter body 1 is of a concave circular integral structure, a cutter groove of the rotary hard alloy blade 2 is formed in the cutter groove, a screw hole is formed in the cutter groove, the rotary hard alloy blade 2 is arranged on the inner side and the outer side of the cutter body 1 in a staggered mode, one end of the rotary hard alloy blade 2 is lapped on the circumference of the end face of the inner side and the outer side of the cutter body 1, an inclined screw hole is formed in the rotary hard alloy blade 2, the rotary hard alloy blade 2 is arranged in the cutter groove, and the rotary hard alloy blade 2 is fastened on the cutter body 1 through the inclined screw hole by the blade fixing screw 3;

the middle positions of the left end part and the right end part of the indexable hard alloy blade are provided with steps, the fall is 0.05-0.2 mm, the left end circular arc part and the right end circular arc part of the indexable hard alloy blade are designed into an outer cutter part and an inner cutter part, and the difference between the outer cutter part and the inner cutter part at the left end circular arc part and the right end circular arc part of the indexable hard alloy blade is that the difference of inclined edge included angles theta is 2-3 degrees, and the fillet Rx of the outer cutter part is equal to the fillet Ry of the inner cutter part. After assembly, a gamma rear angle is formed between the hard alloy blade and the base surface of the cutter head, and the fall is 0.9-1.2 mm, so that the generated cutting fall is larger than the fall generated by the step of the blade, and the cutter head cannot generate interference when processing a workpiece.

The second embodiment is as follows: the present embodiment is described with reference to fig. 3 to 8. The indexable hard alloy outer blade 2 described in this embodiment is rectangular, and the left and right ends are arc inclined surfaces.

The third concrete implementation mode: this embodiment is described in conjunction with fig. 4 and 5. The normal tooth shape of the indexable hard alloy insert 2 described in the embodiment is herringbone, because the angles alpha and beta are not equal, and alpha is smaller than beta, the cutting edges of the inner and outer arranged inserts at the end surface circular arc are different, in order to eliminate the difference and improve the utilization rate, the right end circular arc of the indexable hard alloy outer insert 2 is ground into an outer cutter part 2-1 and an inner cutter part 2-2, the rest parts are shared, the outer cutter part 2-1 and the inner cutter part 2-2 are ground at the other side of the insert, the insert inclined holes are installed, the positions of the outer cutter part 2-1 and the inner cutter part 2 can be accurately assembled after the indexable hard alloy outer insert 2 is indexed, so that the outer cutter part 2-1 and the inner cutter part 2-2 are on the same hard alloy insert 2 by simple grinding, and the utilization rate of the alloy insert is improved, the use cost is reduced.

The fourth concrete implementation mode: this embodiment is described in conjunction with fig. 3. The cutter body 1 of the embodiment adopts a 1:24 taper hole to position with the end surface, and the end surface key groove rotates to position.

The fifth concrete implementation mode: this embodiment will be described with reference to fig. 1 and 2. The cutter head of the embodiment is suitable for nominal diameters of 7.5-40 inches.

The above embodiments are merely exemplary and not restrictive, and it should be understood that various other changes, modifications, substitutions and alterations can be made by those skilled in the art without departing from the spirit and scope of the utility model.

Claims

1. The utility model provides an indexable gritson spiral bevel gear milling cutter, it comprises cutter body, indexable carbide blade and blade set screw, its characterized in that: the cutter body is of a concave circular integral structure, the cutter body is provided with a cutter groove capable of rotating the hard alloy blade, the cutter groove is internally provided with a screw hole, the rotatable hard alloy blade is arranged on the inner side and the outer side of the cutter body in a staggered mode, one end of the rotatable hard alloy blade is lapped on the circumference of the end faces of the inner side and the outer side of the cutter body, the rotatable hard alloy blade is provided with an inclined screw hole, the rotatable hard alloy blade is arranged in the cutter groove, and the rotatable hard alloy blade is fastened on the cutter body through the inclined screw hole by a blade fixing screw;

2. An indexable grisson bevel gear milling cutter according to claim 1, characterized in that: the indexable hard alloy outer blade is rectangular, and the left end and the right end are arc inclined planes.

3. An indexable grisson bevel gear milling cutter according to claim 1, characterized in that: the indexable hard alloy outer blade forms a herringbone normal tooth shape, angles alpha and beta are not equal, and alpha is smaller than beta.

4. An indexable grisson bevel gear milling cutter according to claim 1, characterized in that: the included angle theta of the bevel edges of the outer cutter part and the inner cutter part at the circular arcs of the left end and the right end of the indexable hard alloy blade is 2-3 degrees.