CN217142587U

CN217142587U - Novel hobbing cutter with replaceable blade

Info

Publication number: CN217142587U
Application number: CN202221018726.4U
Authority: CN
Inventors: 白永胜; 陈大用; 田静
Original assignee: Shenyang Hanwei Machinery Manufacturing Co ltd
Current assignee: Shenyang Hanwei Machinery Manufacturing Co ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-08-09
Anticipated expiration: 2032-04-29

Abstract

The utility model relates to the technical field of machining, in particular to a novel hobbing cutter with replaceable blades, which comprises a cutter bar, an end cover, a plurality of cutter blocks and a hard alloy blade, wherein the cutter blocks are butt-jointed end to end on the cutter bar to form a spiral cutter body; two ends of the cutter body are connected with end covers, and the end covers are fixed on the cutter bar; the hard alloy blade is detachably arranged at the top of the outer circle of the cutter body. The utility model ensures the processing precision of the large gear ring without grinding the gear, improves the bearing capacity and reduces the processing cost; the cutter blocks are adopted, so that on one hand, the machining is convenient, and on the other hand, the thickness of the cutter body can be adjusted according to the thickness of the gear ring; after the cutter is worn, only the blade needs to be replaced, and the conventional hob edge is replaced by grinding and repairing for multiple times, so that the processing preparation time is saved, and the labor productivity is improved; the rejection rate of the hob is greatly reduced, and the production cost is saved.

Description

Novel hobbing cutter with replaceable blade

Technical Field

The utility model relates to the technical field of machining, especially, relate to a novel gear hobbing cutter of removable blade.

Background

It is well known that with the development of technology and the application of computers, the development of world transmission technology tends to adopt hard tooth surfaces. According to statistics, due to the adoption of the hard tooth surface gear, the light weight, the miniaturization and the improvement of quality and performance of the machine are greatly promoted, the working speed of the machine is improved by one grade, and the manufacturing cost can be reduced. Therefore, hard-toothed gears are increasingly used. The bearing capacity of the gear with the hard tooth surface is high, and the gear is subjected to quenching, surface quenching or carburizing and quenching treatment after semi-finishing cutting so as to improve the hardness. However, in the heat treatment, the gear inevitably undergoes deformation, particularly in the case of a large ring gear, and therefore grinding, lapping or finish cutting must be performed after the heat treatment to eliminate errors due to the deformation. Under the influence of equipment, some oversized gear rings cannot be ground, so that the expected precision cannot be achieved, a common hob cannot be machined due to high hardness after the tooth surface is subjected to heat treatment, a coated cutter can be machined, but the cutter is quickly worn, frequent grinding and repair of a cutter edge are needed, the thickness of the coated layer is limited, the coated layer becomes very thin or directly falls off after multiple times of grinding, so that the hob is directly scrapped, and the production cost is always high.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcoming, the deficiency of prior art, the utility model provides a novel gear hobbing cutter of removable blade, it has solved the condemned problem of hobbing cutter behind traditional hobbing cutter grinding many times to and solve the difficult problem of super hardness processing.

In order to achieve the above object, the utility model discloses a main technical scheme include:

the embodiment of the utility model provides a novel gear hobbing cutter with replaceable blades, which comprises a cutter rod, an end cover, a plurality of cutter blocks and hard alloy blades, wherein the cutter blocks are butt-jointed end to end on the cutter rod to form a spiral cutter body; two ends of the cutter body are connected with end covers, and the end covers are fixed on the cutter bar; the hard alloy blade is detachably arranged at the top of the outer circle of the cutter body.

Further, the carbide inserts are uniformly fixed on the cutter body through screws.

Further, a plurality of the cutter blocks are fixed on the cutter bar through screws.

Furthermore, trapezoidal threads and screw holes arranged among the trapezoidal threads are arranged on the cutter bar, and the cutter block is positioned on the cutter bar through the matching of a positioning pin and the trapezoidal threads; the cutter block is fixed on the cutter bar through the matching of a screw and the screw hole.

Furthermore, a positioning pin hole is formed in the inner arc surface of the cutter block, and a positioning pin is installed in the positioning pin hole.

Furthermore, the two sides of the cutter block are provided with cutting grooves for discharging scrap iron during gear hobbing.

Furthermore, the end part of the cutter bar connected with the end cover is provided with an annular step structure, one end part of the end cover is matched with the annular step structure, and the other end part of the end cover is matched with the cutter block.

The utility model has the advantages that: the utility model discloses a novel gear hobbing cutter of removable blade, it has solved the processing difficult problem of super hardness flank of tooth bull gear. The method has the following technical effects:

1. under the condition of not grinding the teeth, the machining precision of the large gear ring is ensured, the bearing capacity of the large gear ring is improved, and the machining cost is reduced;

2. the cutter blocks are adopted, so that on one hand, the machining is convenient, and on the other hand, the thickness of the cutter body can be adjusted according to the thickness of the gear ring;

3. after the cutter is worn, only the blade needs to be replaced, and the conventional hob edge is replaced by multiple grinding and repairing, so that the processing preparation time is saved, and the labor productivity is improved;

4. the rejection rate of the hob is greatly reduced, and the production cost is saved.

Drawings

Fig. 1 is a schematic structural view of a novel hobbing tool with replaceable blades according to the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a side view of a new replaceable blade hobbing tool of the present invention;

fig. 4 is a perspective view of the novel hobbing tool with replaceable blades of the present invention;

fig. 5 is another perspective view of the novel replaceable-blade hobbing tool of the present invention;

FIG. 6 is a structural diagram of the cutter bar of the present invention;

fig. 7 is a structural diagram of the knife block of the present invention.

In the figure: 1. a cutter bar; 11. trapezoidal threads; 12. a screw hole; 13. an annular step structure; 2. an end cap; 3. a cutter block; 31. a positioning pin hole; 32. arranging and cutting grooves; 33. half-hole; 4. a cemented carbide blade; 5. a screw; 6. and a positioning pin.

Detailed Description

For a better understanding of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings.

Example 1:

referring to fig. 1 to 5, the present invention provides a novel hobbing tool with replaceable blades. The gear hobbing cutter comprises a cutter bar 1, an end cover 2, a plurality of cutter blocks 3 and hard alloy blades 4. The cutter blocks 3 are butt-jointed end to end on the cutter bar 1 to form a spiral cutter body. The two ends of the cutter body are tightly connected with the end cover 2, and the end cover 2 is fixed on the cutter bar 1 through a screw 5. The carbide blade 4 is detachably arranged on the top of the outer circle of the cutter body. Specifically, carbide blade 4 passes through screw 5 and fixes at the excircle top of cutter body uniformly, and the quantity of carbide blade 4 designs according to concrete demand, can install several more in the place that the atress is big. The cutter block 3 is in a spiral line structure, and the direction of the blade is arranged along the direction of the cutter block 3. A plurality of cutter blocks 3 are fixed on the cutter bar 1 through screws 5, and the number of the cutter blocks 3 is designed according to specific machining requirements.

The utility model discloses a multistage sword piece 3's form is made to the cutter body, and the gear precision reduces after being convenient for process and preventing the cutter wearing and tearing. In the process of processing the superhard tooth surface, the hob is quickly abraded, and the replaceable hard alloy blade 4 is arranged on the cutter block 3, so that the hob can be conveniently replaced after being abraded. The utility model discloses a carbide blade 4, hardness is high, and wearability and toughness are better, have stronger heat resistance, still have very high hardness under high temperature, are applicable to the super hardness processing.

In particular, with reference to fig. 6, the tool holder 1 is provided with trapezoidal threads 11 and a threaded hole 12 arranged between the trapezoidal threads 11. The trapezoidal thread 11 is matched with the positioning pin 6 in the positioning pin hole 31 arranged on the inner arc surface of the cutter block 3, so that the positioning pin 6 can slide in the trapezoidal thread 11, and the lead of the cutter block 3 is the same as that of the trapezoidal thread 11 after the cutter block 3 is arranged on the cutter bar 1. The screw 5 is matched with the screw hole 12 to fix the cutter block 3 on the cutter bar 1.

The end part of the cutter bar 1 connected with the end cover 2 is provided with an annular step structure 13, one end part of the end cover 2 is matched with the annular step structure 13, and the other end part of the end cover 2 is matched with the cutter block 3. Specifically, the inner diameter of one end of the end cover 2 is equivalent to the inner diameter of the annular step structure 13, so that the end cover 2 can be embedded on the annular step structure 13 and can play a limiting role. The shape of the other end of the end cover 2 is set according to the shape of the cutter block 3 at two ends of the cutter body, a half hole 33 is arranged at one end of the end cover 2, which is in contact with the cutter block 3, the diameter of the half hole 33, which is close to the cutter bar 1, is smaller than the diameter of the half hole 33, which is far away from the cutter bar 1, a round hole is formed by butt joint with the half hole 33 on the cutter block 3, and the end cover 2 and the cutter block 3 are fixed on the cutter bar 1 through a screw 5.

Specifically, referring to fig. 7, both side surfaces of the cutter block 3 are provided with chip discharge grooves 32 to discharge iron chips at the time of hobbing. The middle part of the inner arc surface of the cutter block 3 is provided with a positioning pin hole 31 for installing the positioning pin 6. The both sides of the interior cambered surface of sword piece 3 are equipped with half hole 33, and half hole 33 is close to the diameter of cutter arbor 1 and is less than the diameter of keeping away from cutter arbor 1, along two half holes 33 butt joints on two cutter pieces 3 that cutter arbor 1 axial is adjacent and constitute a round hole for insert screw 5, fix sword piece 3 on cutter arbor 1.

The utility model discloses a gear hobbing cutter passes through screw 5 with carbide blade 4 and fixes on sword piece 3, and carbide blade 4 wearing and tearing back through the mode of changing carbide blade 4 prevents the condemned problem of hobbing cutter after grinding many times to and can solve the difficult problem of super hardness processing.

The following describes the usage of the present invention with reference to the attached drawings:

1. first, the carbide insert 4 is fixed to the block 3 with the screw 5.

2. Next, an end cap 2 is installed on one side of the cutter bar 1, a plurality of cutter blocks 3 are installed on the cutter bar 1 in sequence by sliding in trapezoidal threads 11 on the cutter bar 1 through positioning pins 6, and are screwed and fixed by screws 5, and then another end cap 2 is installed on the other side of the cutter bar 1.

3. And finally, mounting the assembled gear hobbing cutter on a cutter frame of the gear hobbing machine, and starting a driving motor to drive the workpiece to perform gear hobbing.

4. After the hard alloy blade 4 is worn or damaged in the processing process, the hard alloy blade can be directly disassembled and replaced; after the cutter block 3 is worn or damaged, the steps can be repeated for replacement.

Claims

1. A novel hobbing cutter of removable blade which characterized in that: the cutter comprises a cutter bar (1), an end cover (2), a plurality of cutter blocks (3) and hard alloy blades (4), wherein the cutter blocks (3) are installed on the cutter bar (1) in an end-to-end butt joint mode to form a spiral cutter body; two ends of the cutter body are connected with an end cover (2), and the end cover (2) is fixed on the cutter bar (1); the hard alloy blade (4) is detachably arranged at the top of the outer circle of the cutter body.

2. The new replaceable blade hobbing tool of claim 1, wherein: the hard alloy blades (4) are uniformly fixed on the cutter body through screws (5).

3. The new replaceable blade hobbing tool of claim 1, wherein: the cutter blocks (3) are fixed on the cutter bar (1) through screws (5).

4. The new replaceable blade hobbing tool of claim 1, wherein: trapezoidal threads (11) and screw holes (12) arranged among the trapezoidal threads (11) are arranged on the cutter bar (1), and the cutter block (3) is positioned on the cutter bar (1) through the matching of a positioning pin (6) and the trapezoidal threads (11); the cutter block (3) is fixed on the cutter bar (1) through the matching of a screw (5) and the screw hole (12).

5. The new replaceable blade hobbing tool of claim 1, wherein: and a positioning pin hole (31) is formed in the inner arc surface of the cutter block (3), and a positioning pin (6) is installed in the positioning pin hole (31).

6. The new replaceable blade hobbing tool of claim 1, wherein: and the two sides of the cutter block (3) are provided with cutting grooves (32) for discharging scrap iron during gear hobbing.

7. The new replaceable blade hobbing tool of claim 1, wherein: the end part of the cutter bar (1) connected with the end cover (2) is provided with an annular step structure (13), one end part of the end cover (2) is matched with the annular step structure (13), and the other end part of the end cover (2) is matched with the cutter block (3).