CN219541919U

CN219541919U - Hobbing cutter before processing gear indexable blade grinds

Info

Publication number: CN219541919U
Application number: CN202320731099.7U
Authority: CN
Inventors: 范晓海; 陈红杰; 马兆栋; 王斌; 王强; 张海彬; 徐厚群
Original assignee: Meigeli Zhejiang Technology Co ltd
Current assignee: Meigeli Zhejiang Technology Co ltd
Priority date: 2023-03-30
Filing date: 2023-03-30
Publication date: 2023-08-18
Anticipated expiration: 2033-03-30

Abstract

The utility model provides a hob before grinding of an indexable blade for processing gears, and belongs to the field of cutters. The problems of inconvenient disassembly, low machining precision and short service life of the blade of the conventional gear hob are solved. The hob before grinding of indexable blade for processing gears comprises a hob body which is arranged in a cylindrical structure, a hob frame which is in a spiral structure is arranged around the outer circumferential surface of the hob body, a plurality of cutter grooves which are vertically spaced and uniformly arranged are formed in the upper surface and the lower surface of the hob frame, blades are arranged in the cutter grooves, the cutter grooves comprise mounting surfaces for supporting the blades, large positioning surfaces for supporting and positioning the side surfaces of the blades and small positioning surfaces for supporting the end surfaces of the blades and being positioned at the inner sides, a chip guiding groove which is arranged in an arc structure and extends along the direction of the cutter grooves is formed in one side of each cutter groove, and empty avoiding grooves are formed between the mounting surfaces and the large positioning surfaces as well as between the mounting surfaces and the small positioning surfaces. The utility model has the advantages of stable blade installation, convenient disassembly, long service life of the blade and convenient cleaning.

Description

Hobbing cutter before processing gear indexable blade grinds

Technical Field

The utility model belongs to the field of cutters, relates to a gear forming cutter, and particularly relates to a hob before grinding of an indexable blade for processing gears.

Background

The gear forming cutters comprise a gear hobbing cutter, a gear milling cutter, a gear shaving cutter and the like, and the gear hobbing cutter has the characteristics of high production efficiency and high surface quality of a gear hobbing gear, so that the gear hobbing cutter is widely applied to gear mass production.

For example, patent document discloses a patent number of 201920228536.7, the patent name is "a gear hobbing cutter convenient to detach and wash", it discloses a gear hobbing cutter, including the blade holder, first connection structure, second connection structure and gear hobbing structure, set up first connection structure and second connection structure in the both sides of blade holder and be used for fixed blade holder and be connected with the gear hobbing machine, set up on the blade holder sliding connection's gear hobbing structure and make things convenient for quick detach the type of changing different gear hobbing, can change different gear hobbing according to processing needs on the gear hobbing cutter simultaneously, this kind of gear hobbing cutter structure makes things convenient for the cutter to dismantle, wash and change, but because frequent dismantlement and the connection structure of cutter and cutter pole are unstable, result in the cutter to receive the influence at the post-processing precision of dismantling many times, thereby reduce the qualification rate of gear that processes, and the cutter that this structure is suitable for needs customization and life-span is lower, and the cost of enterprises has been improved, the benefit has been reduced.

Therefore, a hob for a indexable cutting insert for a processing gear, which is convenient for the disassembly of the cutting insert, has high processing precision and long service life of the cutting insert, is currently required.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides the indexable cutter for the front grinding of the machined gear, which is convenient for disassembly of the cutter, has higher machining precision and long service life of the cutter.

The aim of the utility model can be achieved by the following technical scheme: the utility model provides a hobbing cutter before processing gear indexable blade grinds, its characterized in that, is including the cutter arbor main part that is cylindrical structure setting, cutter arbor main part outer periphery encircle and be the knife rest of spiral structure, knife rest upper surface and lower surface all have a plurality of sword grooves of interval and even arrangement from top to bottom, a plurality of sword inslot all install the blade, and a plurality of sword groove all include the installation face that supplies the blade to support, supply the blade side to support and lean on and the locating surface and be located inboard and supply the small locating surface that the blade terminal surface supported, sword groove one side have and be arc structure setting and follow the chipguide groove that the sword groove orientation extends, installation face and big locating surface, installation face and small locating surface between be equipped with the clearance groove.

In the hob before grinding the indexable blade for processing the gear, the blade is an indexable blade and comprises a cutter bar in the middle and cutter heads positioned at two sides of the cutter bar, and the cutter heads at two sides are provided with cutter faces for abutting against and positioning with small positioning faces.

In the hob before grinding of the indexable cutting blade for processing the gear, the section of the hob frame is arranged in a conical structure, and the width of the section of the hob frame gradually decreases from the surface of the hob frame to the outer side.

In the hob before grinding of the indexable blade for machining gears, the first threaded hole is formed in the mounting surface of the hob frame, a through hole which coincides with the central axis of the first threaded hole is formed in the center of the blade, and the blade and the hob frame are fastened by screws.

In the hob before grinding the indexable cutting blade for processing the gear, the first threaded hole and the through hole are obliquely arranged.

In the hob before grinding of the indexable cutting blade for processing the gear, the center of the hob is provided with the mounting hole for being mounted with the external mandrel, and the two end surfaces and the side surfaces of the hob are provided with a plurality of second threaded holes.

Compared with the prior art, the hob for the indexable insert for machining the gears has the following advantages:

1. the blades are arranged on the cutter rest and the upper surface and the lower surface at intervals, so that the cutter rest is convenient to detach and replace, and the blades are more firmly arranged on the cutter rest through the arrangement of the plurality of positioning surfaces and the inclined threaded holes, so that displacement is not easy to occur, and machining errors are reduced;

2. through the double-cutter head arrangement of the cutter blade, both ends of the cutter blade can be used as cutting parts. The utilization rate and the service life of the blade are improved, the production cost is reduced, and the enterprise benefit is improved;

3. the chip guide groove arranged on one side of the cutter groove is beneficial to chip removal in the processing process, and convenient to clean and maintain.

Drawings

Fig. 1 is a schematic perspective view of a hob before grinding of an indexable insert for machining gears.

Fig. 2 is a partial enlarged view at the sipe.

Fig. 3 is a schematic perspective view of a blade.

In the figure, 1, a cutter bar main body; 2. a tool holder; 3. a knife slot; 4. a blade; 5. a mounting surface; 6. a large positioning surface; 7. a small positioning surface; 8. a chip guiding groove; 9. an empty-avoiding groove; 10. a cutter bar; 11. a cutter head; 12. a knife surface; 13. a first threaded hole; 14. a through hole; 15. a mounting hole; 16. and a second threaded hole.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1, 2 and 3, the hob before grinding an indexable blade for machining gears comprises a hob body 1 which is arranged in a cylindrical structure, a hob rest 2 which is in a spiral structure is surrounded on the outer circumferential surface of the hob body 1, a plurality of tool grooves 3 which are vertically spaced and uniformly arranged are formed on the upper surface and the lower surface of the hob rest 2, a blade 4 is installed in the plurality of tool grooves 3, the plurality of tool grooves 3 all comprise a mounting surface 5 for the blade 4 to abut against, a large positioning surface 6 for the side surface of the blade 4 to abut against and position, and a small positioning surface 7 positioned on the inner side for the end surface of the blade 4 to abut against, a chip guiding groove 8 which is arranged in an arc structure and extends along the direction of the tool groove 3 is formed on one side of the tool groove 3, and a clearance groove 9 which is formed between the mounting surface 5 and the large positioning surface 6, the mounting surface 5 and the small positioning surface 7 is used for preventing the blade 4 from being worn on the inner side of the tool groove 3, and reducing extrusion stress received after the blade 4 is installed.

Further, the insert 4 is an indexable insert, and comprises a middle cutter bar 10 and cutter heads 11 positioned at two sides of the cutter bar 10, wherein the cutter heads 11 at two sides are provided with cutter surfaces 12 for abutting against the small positioning surfaces 7, the cutter heads 11 at two sides have the same structure, and after the cutter heads 11 at one side are worn, the cutter heads 11 at the other side can be used in an indexable manner, and the cutter heads 11 at the other side can be used continuously.

Preferably, the tool holder 2 is tapered in cross section and gradually decreases in cross-sectional width from the surface of the tool holder body 1 to the outside.

Preferably, the tool rest 2 is provided with a first threaded hole 13 at the mounting surface 5, the center of the blade 4 is provided with a through hole 14 overlapped with the central axis of the first threaded hole 13, and the blade 4 and the tool rest 2 are fastened by adopting screws.

Preferably, the first threaded hole 13 and the through hole 14 are inclined with respect to the vertical direction.

Preferably, the cutter bar 10 has a mounting hole 15 in the center for mounting with an external spindle, and a plurality of second threaded holes 16 are formed in both end surfaces and side surfaces of the cutter bar 10.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Although the terms of the tool holder body 1, the tool holder 2, the pocket 3, the insert 4, the mounting surface 5, the large positioning surface 6, the small positioning surface 7, the chip guide groove 8, the clearance groove 9, the tool holder 10, the tool bit 11, the tool face 12, the first screw hole 13, the through hole 14, the mounting hole 15, the second screw hole 16 are used more herein, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.

Claims

1. The utility model provides a hobbing cutter before processing gear indexable insert grinds, includes cutter arbor main part (1) that is cylindrical structure setting, cutter arbor main part (1) outer periphery encircle and have cutter saddle (2) that are spiral structure, cutter saddle (2) upper surface and lower surface all have a plurality of sword groove (3) of interval and evenly arranged from top to bottom, a plurality of sword groove (3) in all install blade (4), and a plurality of sword groove (3) all include mounting surface (5) that supply blade (4) to support, supply the big locating surface (6) that support and fix a position of blade (4) side support and be located inboard and supply blade (4) terminal surface to support small locating surface (7), sword groove (3) one side have be arc structure setting and along a small locating surface (7) between a plurality of sword groove (5) and large locating surface (6), mounting surface (5) and small locating surface (7) be equipped with and keep away empty groove (9).

2. The hob before grinding of indexable cutting inserts for machining gears according to claim 1, characterized in that the cutting inserts (4) are indexable cutting inserts comprising a central cutting shank (10) and cutting heads (11) located on both sides of the cutting shank (10), both cutting heads (11) having a cutting face (12) for abutment against the small positioning face (7).

3. The hob before grinding of indexable cutting inserts for machining gears according to claim 1, characterized in that the cross section of the tool holder (2) is arranged in a conical structure and the width of the cross section decreases gradually from the surface of the tool holder body (1) to the outside.

4. The hob before grinding of the indexable insert for machining gears according to claim 1, characterized in that the hob (2) is provided with a first threaded hole (13) at the mounting surface (5), the center of the insert (4) is provided with a through hole (14) coinciding with the central axis of the first threaded hole (13), and the insert (4) and the hob (2) are fastened by screws.

5. The hob before grinding of indexable insert for manufacturing gears according to claim 4, wherein the first threaded hole (13) and the through hole (14) are inclined.

6. The indexable insert pre-milling hob for machining gears according to claim 1, characterized in that the centre of the hob (10) is provided with a mounting hole (15) for mounting with an external spindle, the hob (10) being provided with a number of second threaded holes (16) on both end faces and sides.