Indexable gear hob

Abstract

The utility model relates to a roll insert cutter of indexable gear, and relates to a cylindrical gear processing cutter. The utility model solves the problems of traditional roll insert method, such as vertical installation, non-anti-upwarping and risk of loosening and falling during processing. The cutter body is in a circular structure, and the circumference of the cutter body is provided with uniformly arranged blade grooves. The roll insert cutter blade of hard alloy is arranged in the blade groove, and is pressed in the blade groove by a pressing screw. The blade is made into an inverted inclined surface, and the blade groove is made into a corresponding positioning form, so that a pressing force is naturally formed to prevent the blade root from being upwarping. The utility model saves cost and improves work efficiency, maximally improves the strength of the roll insert cutter, increases the cutting depth and cutting speed, and shortens the processing time.

Description

Technical Field

[0001] This utility model relates to gear machining tools, specifically to an optimized indexable gear hobbing tool. Background Technology

[0002] Currently, the development of cemented carbide coating technology and gear hobbing machine tools has led to the increasingly widespread application of indexable hobbing cutters. The machining process of indexable gear hobbing cutters involves both the generating process of hobbing cutters and the scraping cutting of cutting cutters. During the machining process, the load on the cutting inserts is complex and uneven, and high precision of the cutting tools must be maintained. The existing indexable inserts of cutting tools are mounted on the end face normal direction. Therefore, there is an urgent need to optimize and improve the design of traditional cutting tools to make them more stable, reliable and efficient. Utility Model Content

[0003] To address the problems of poor positioning accuracy, complex and uneven loads on existing indexable gear hobbing inserts during the generating process, and the susceptibility of machining accuracy to various load impacts, this invention provides an optimized indexable gear hobbing insert. The technical solution to this problem is as follows:

[0004] The optimized indexable gear hobbing cutter of this utility model consists of a cutter body, indexable carbide hobbing gear inserts, and insert clamping screws. The cutter body has a circular structure with uniformly arranged insert grooves on its circumference. The indexable carbide hobbing gear inserts are spindle-shaped and have a clearance angle γ. The positioning bevel of the indexable carbide hobbing gear inserts is inverted, and the positioning bevel of the insert groove is correspondingly inverted with the positioning bevel of the insert. The insert is placed in the cutter groove and clamped in place by the insert clamping screws. The indexable gear hobbing cutter has a rake angle θ and a clearance angle β, thus constituting an optimized indexable gear hobbing cutter.

[0005] This utility model presents an optimized indexable gear hobbing cutter, applicable to high-speed gear hobbing machines. It features a simple structure and high strength. The indexable carbide hobbing insert is shaped like a shuttle, with a cutting clearance angle β on its outer circumference. The positioning bevel of the indexable carbide hobbing insert is inverted, and the positioning surface of the insert groove is also correspondingly inverted. When the indexable carbide hobbing insert is placed in the groove and the screw is tightened, a downward pressure is naturally generated, effectively preventing the insert from loosening or falling off due to reaction forces during use. This structure is cost-effective, compact, and high-strength, overcoming the shortcomings of traditional indexable gear hobbing cutters. The inverted positioning surface S of the indexable carbide hobbing insert uses a through-type structure, which facilitates machining. Traditional designs use a non-through, stepped structure, making machining difficult. This optimized design improves the performance of the indexable gear hobbing cutter.

[0006] Gear hobbing is a novel machining method for processing internal and external spur gears and helical gears that has developed rapidly in recent years. It combines the characteristics of hobbing and shaping, and has unique advantages in machining stepped surfaces and herringbone gears. Machining speeds can reach over 100 m / min, resulting in very high efficiency. Solid high-speed steel hobbing cutters are limited by material constraints, and solid carbide hobbing cutters are quite expensive. Therefore, the advantages of using indexable carbide inserts for hobbing cutters are very obvious, making the application prospects of optimized indexable gear hobbing cutters very promising. Attached Figure Description

[0007] Figure 1 This is a front view of the optimized indexable gear hobbing cutter of this utility model after assembly. Figure 2 yes Figure 1 The right view, Figure 3 This is the main view of an optimized indexable carbide rolling insert. Figure 4 yes Figure 3 The right view, Figure 5 yes Figure 3 The bottom view, Figure 6 yes Figure 3 3D images, Figure 7 It's a 3D model of the cutting tool. Figure 8 This is a schematic diagram showing the positioning of the blade and groove before partial cutting. Figure 9 This is a schematic diagram showing the blade and groove positioning after partial cutting. Figure 10 This is the front view of the cut plan. Figure 11 yes Figure 10 View of part A after the middle cut. Figure 12 This is the front view of a traditional blade. Figure 13 This is a top view of a traditional blade. Figure 14 It is a 3D illustration of a traditional blade. Detailed Implementation

[0008] Specific implementation method one: Combining Figures 1 to 11 This embodiment describes an implementation. It comprises a tool body 1, an indexable carbide hobbing insert 2, and an insert clamping screw 3. The tool body 1 has a circular structure with uniformly arranged insert grooves on its circumference. The indexable carbide hobbing insert 2 is spindle-shaped and has a clearance angle γ. The indexable carbide hobbing cutter has a rake angle θ and a clearance angle β. The positioning bevel 2-1 of the indexable carbide hobbing insert is inverted, and the positioning bevel 1-1 of the insert groove corresponds to the inverted positioning bevel 2-1. The indexable carbide hobbing insert 2 is placed in the insert groove and clamped in place by the insert clamping screw 3, thus forming an optimized indexable gear hobbing cutter.

[0009] Specific Implementation Method Two: Combining Figures 1 to 11 This embodiment is described. The indexable carbide rolling inserts 2 described in this embodiment are evenly distributed in the insert grooves on the circumference of the cutter body 1.

[0010] Specific implementation method three: Combining Figures 1 to 11 This embodiment describes an indexable carbide hobbing insert 2, which is inverted within a corresponding beveled groove.

[0011] Specific implementation method four: Combination Figures 1 to 11 This embodiment describes the following. The locating surface angle α of the indexable carbide hobbing insert 2 described in this embodiment is 8 to 15 degrees.

[0012] Specific Implementation Method Five: Combining Figure 4 , Figure 14 This embodiment describes an indexable carbide hobbing insert 2 with a through-type positioning surface S. This facilitates machining, whereas traditional inserts are non-through, stepped, and difficult to machine.

[0013] Specific Implementation Method Six: Combination Figures 1 to 11 This embodiment is described. The axis angle of the indexable gear hobbing cutter described in this embodiment is 15 to 20 degrees.

[0014] Specific implementation method seven: Combining Figures 1 to 11 This embodiment is described. The rake angle θ of the indexable gear hobbing cutter described in this embodiment is 0–5°, and the clearance angle β of the indexable gear hobbing cutter is 5–10°.

[0015] Specific implementation method eight: Combination Figures 1 to 11 This embodiment is described. The indexable carbide hobbing insert 2 described in this embodiment has a clearance angle γ of 6 to 15°.

[0016] Specific implementation method eight: Combination Figures 1 to 11 This embodiment describes the tool body 1, which uses internal hole positioning and an end face key to assist in preventing rotation and reducing vibration.

[0017] Specific implementation method nine: Combining Figures 1 to 11 This embodiment describes an indexable gear hobbing cutter. The indexable gear hobbing cutter described in this embodiment is suitable for machining the internal and external teeth of cylindrical gears with a module of M3 to M16. It can also be applied to hobbing machining of other workpieces.

[0018] The above embodiments are merely exemplary and are not limited to this utility model. It should be noted that for those skilled in the art, any other equivalent changes, modifications, substitutions and variations made under the guidance of the technical solutions provided by this utility model should be considered within the protection scope of this utility model.

Claims

1. An indexable gear hobbing cutter, comprising a cutter body, indexable carbide hobbing gear inserts, and insert clamping screws, characterized in that: The tool body has a circular structure with evenly distributed insert grooves on its circumference. The indexable carbide hobbing insert is spindle-shaped and has a clearance angle γ. The positioning bevel of the indexable carbide hobbing insert is inverted, and the positioning bevel of the insert groove corresponds to the inverted positioning bevel of the indexable carbide hobbing insert. The indexable carbide hobbing insert is placed in the insert groove and pressed into the insert groove by the insert clamping screw. The indexable gear hobbing tool has a rake angle θ and a clearance angle β, thus constituting the indexable gear hobbing tool.

2. The indexable gear hobbing cutter according to claim 1, characterized in that: The indexable carbide rolling insert is inverted in the corresponding beveled groove.

3. The indexable gear rolling cutter according to claim 1, characterized in that: The positioning surface angle α of the indexable carbide rolling insert is 8 to 15 degrees.

4. The indexable gear rolling cutter according to claim 1, characterized in that: The inverted positioning surface S of the indexable carbide roller insert has a through structure.

5. The indexable gear rolling cutter according to claim 1, characterized in that: The rake angle of the indexable gear rolling cutter is 0 to 5°, and the clearance angle is 5 to 10°.

6. The indexable gear rolling cutter according to claim 1, characterized in that: The back angle of the indexable gear rolling cutter is 6 to 15°.

7. The indexable gear hobbing cutter according to claim 1, characterized in that: The axis angle of the indexable gear rolling cutter is 15 to 20 degrees.

8. The indexable gear rolling cutter according to claim 1, characterized in that: The indexable gear hobbing cutter is suitable for the internal and external teeth of cylindrical gears with a module of M3 to M16.

Images