CN116511577A

CN116511577A - Multi-face milling cutter structure

Info

Publication number: CN116511577A
Application number: CN202310594288.9A
Authority: CN
Inventors: 潘国刚; 马明全; 陆学贵
Original assignee: Zhejiang Boya Precision Machinery Co ltd
Current assignee: Zhejiang Boya Precision Machinery Co ltd
Priority date: 2023-05-22
Filing date: 2023-05-22
Publication date: 2023-08-01

Abstract

The invention discloses a multi-face milling cutter structure, which comprises a cutter shaft part and a cutter head part, wherein the cutter head part is detachably arranged at one end of the cutter shaft part, and is characterized in that the cutter head part comprises: the main disc body is outwards protruded from two opposite sides of the center of the main disc body to form a connecting body, a connecting hole is formed in the connecting body in a penetrating manner, two first key grooves are formed in the connecting body, the two first key grooves are formed in the inner wall of the connecting hole, and an included angle formed by the center lines of the two first key grooves is smaller than 180 degrees; the cutter bodies are uniformly distributed on the side curved surface of the main disk body, three adjacent cutter faces are arranged on the cutter bodies, and the directions of the two adjacent cutter bodies are opposite. The invention reasonably distributes the relation between the machining resistance and the machining efficiency, can reduce the influence of the machining resistance while improving the machining efficiency, and improves the machining efficiency and the effect.

Description

Multi-face milling cutter structure

Technical Field

The invention relates to the technical field of machining, in particular to a multi-face milling cutter structure.

Background

At present, milling can be realized by a numerical control machine tool, a workpiece is fixed firstly, then a milling cutter rotating at a high speed is used for feeding on the workpiece, the required shape and characteristics are processed, a multi-edge cutter is generally adopted for processing, the cutting edge is used for cutting alternately, the cooling effect of the cutter is good, and the durability is high.

The present milling cutter structure, shape and kind are more, and a blade disc as disclosed in CN110548885A includes chassis and blade, be equipped with the pilot hole on the blade, be provided with a plurality of mounting areas that are the interval distribution indent along the circumference of blade disc.

As another example, CN213646025U discloses a milling cutter disc and a milling cutter disc assembly, the milling cutter disc includes a cutter disc main body, one end of the cutter disc main body is used for being connected with a machine tool, the other end is a working end surface, the working end surface is provided with a plurality of cutter placing grooves for fixing diamond blades, and the plurality of cutter placing grooves are arranged along the circumferential direction of the cutter disc main body at intervals.

As another example, a rotary slot milling cutter as disclosed in CN1020180C has a flat sided disc-shaped cutter body with a plurality of spaced openings around the periphery of the cutter body, one blade in each opening, and the radial movement is inhibited by the shape of the opening to clamp it.

The existing milling cutter structure has the problem of higher cutting resistance in the machining process, particularly in the machining process for the Roots shell, so that the machining efficiency is lower, and the machining quality is affected.

Disclosure of Invention

The invention provides a high-efficiency multi-face milling cutter structure for avoiding the defects in the prior art.

The invention solves the technical problems by adopting the following technical scheme: the utility model provides a multiaspect milling cutter structure, includes a knife shaft portion and a blade disc portion, blade disc portion detachable sets up in knife shaft portion one end, its characterized in that, blade disc portion includes:

the main disc body is outwards protruded from two opposite sides of the center of the main disc body to form a connecting body, a connecting hole is formed in the connecting body in a penetrating manner, two first key grooves are formed in the connecting body, the two first key grooves are formed in the inner wall of the connecting hole, and an included angle formed by the center lines of the two first key grooves is smaller than 180 degrees;

the cutter bodies are uniformly distributed on the side curved surface of the main disk body, three adjacent cutter faces are arranged on the cutter bodies, and the directions of the two adjacent cutter bodies are opposite.

In several embodiments, the tips of the blades are joined in a circle having a diameter between 141 and 143 mm.

In several embodiments, the outer diameter of the coupling body is between 41-43 mm.

In several embodiments, the connecting hole has an inner diameter of between 26 and 28 mm.

In several embodiments, the acute included angle between the centerline of one of the first keyways and the centerline of the other first keyway is between 14-16 °.

In several embodiments, the width of the first keyway is between 1.5 and 2.5mm and the depth of the first keyway is between 3 and 3.5 mm.

In several embodiments, a connection slope is formed between two adjacent cutter bodies, and the connection slope is recessed toward the inner side of the main disc body between the two cutter bodies.

In several embodiments, the cutter body includes adjacent first, second and third facets, the first and second facets being connected end to end, the second facet extending in a direction of the connecting slope, the third facet being connected to the first and second facets, the third facet extending in a direction of an end face of the cutterhead.

In several embodiments, the second and third facets are each obliquely connected to the first facet.

In several embodiments, the coupling body is provided with a first positioning hole, and the cutter shaft portion is provided with a second positioning hole, where the first positioning hole corresponds to the second positioning hole.

The invention has the beneficial effects that:

the three-sided knife body structure can effectively improve the processing efficiency and prolong the service life of the knife body.

The invention can avoid the tool from being misplaced by the structure of the connector and the internal key groove, and simultaneously provides a larger torque transmission effect.

According to the invention, the cutter body is designed to be staggered in orientation, so that the cutting resistance is reduced.

Drawings

The drawings described herein are for illustration purposes only of selected embodiments and are not intended to represent all possible implementations and should not be construed as limiting the scope of the present invention.

Fig. 1 schematically shows the overall structure of a multi-face milling cutter structure in the present embodiment;

FIG. 2 schematically illustrates an enlarged configuration of the shaft portion of the knife of FIG. 1;

fig. 3 schematically illustrates a top view of the cutterhead of fig. 1;

fig. 4 schematically illustrates a side view of the cutterhead of fig. 1;

fig. 5 schematically shows a perspective structure of the cutterhead in fig. 1;

FIG. 6 schematically illustrates an enlarged structure of portion A of FIG. 5;

fig. 7 schematically shows an enlarged structure of the B portion of fig. 5.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and for the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention but not all embodiments of the present invention.

Accordingly, the following detailed description of the embodiments of the invention, provided in connection with the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention, as all other embodiments that may be obtained by one of ordinary skill in the art without making inventive efforts based on the embodiments herein, are within the scope of this invention.

As shown in fig. 1 to 7, the multi-face milling cutter structure provided by the invention is mainly applied to the processing process of a Roots shell, and mainly comprises a cutter shaft portion 10 and a cutter head portion 20, wherein the cutter shaft portion 10 is assembled on a machine tool for use, the cutter head portion 20 is detachably connected with the cutter shaft portion 10, and the cutter head portion 20 is positioned at the end part of the cutter shaft portion 10.

The cutterhead 20 is composed of a main disc 210 and a plurality of cutters 220 uniformly distributed on the curved surface of the main disc 210.

And, two opposite sides of the center of the main disc 210 protrude outwards to form a coupling body 211, a connecting hole 212 is penetrated in the coupling body 211, two first key grooves 213 are arranged in the coupling body 211, the two first key grooves 213 are arranged on the inner wall of the connecting hole 212, the included angle formed by the central lines of the two first key grooves 213 is smaller than 180 degrees, the central lines of the two first key grooves are not overlapped, specifically, the included angle A of the acute angle between the central line of one first key groove 213 and the central line of the other first key groove 213 is between 14-16 degrees, and is preferably 15 degrees.

Wherein the outer diameter of the coupling body 211B is between 41 and 43mm, preferably 42mm, the inner diameter of the connecting hole 212 is +.>C is between 26 and 28mm, preferably 27mm.

And the width H1 of the first key groove 213 is between 1.5 and 2.5mm, preferably 2mm, and the depth H2 of the first key groove 213 is between 3 and 3.5mm, preferably 3.3mm.

Wherein, in order to improve the processing efficiency and avoid excessive increase of the processing resistance, a structure of 12 cutter bodies 220 is adopted, and the directions of two adjacent cutter bodies 220 are opposite, the blade tops of the cutter bodies 220 are connected into a circle, and the diameter of the circleA, i.e. the outer diameter of the cutterhead 20 is between 141 and 143mm, preferably 142mm.

A connection slope 230 is formed between two adjacent cutter bodies 220, and the connection slope 230 is recessed toward the inner side of the main tray 210 between the two cutter bodies 220.

Wherein, a connection slope 230 is formed between two adjacent cutter bodies 220, and the connection slope 230 is recessed toward the inner side of the main tray 210 between the two cutter bodies 220.

Specifically, the cutter body 220 includes adjacent first, second and third blade surfaces 221, 222, 223, the first and second blade surfaces 221, 222 are connected end to end, the second blade surface 222 extends in the direction of the connection slope 230, the third blade surface 223 is connected with the first and second blade surfaces 221, 222 extends in the direction of the end face of the cutter head, and the second and third blade surfaces 222, 223 are all connected with the first blade surface 221 in an inclined manner.

Meanwhile, a second positioning hole 101 and two second keyways 102 are arranged on the cutter shaft part 10, the positions of the second keyways 102 correspond to the positions of the first keyways 213, and the positions of the first positioning holes 2111 correspond to the positions of the second positioning holes 101, so that the tool is prevented from being misplaced.

When the size is designed, aiming at the problem that the diameter of the cavity of the Roots shell to be processed is 144mm, the diameter of the rotor supporting hole is 47mm, the outer diameter of the cutter head part 20 is smaller than 144mm, the diameter of the connector 211 is smaller than 47mm, the reserved single side is 1mm in consideration of rough processing, the single side radius difference is (144-47)/2+1=49.5, the radius difference between the cutter head part 20 and the connector 211 is at least larger than 49.5, the outer diameter of the cutter head part 20 is 142mm, the outer diameter of the connector 211 is 42mm, the difference between the two radiuses is 50mm and larger than 49.5, and the size standardization is considered, and the inner diameter of the connecting hole 212 is set to be 27mm.

The thickness of the cutter head portion 20 is set to 11mm in consideration of the rigidity of the cutter head portion 20.

Meanwhile, the length of the cutter shaft part 10 can be shortened by combining the opening sizes of the air inlet end and the air outlet end of the Roots shell of 65mm and 16mm, the total length of the cutter shaft part 10 is about 302mm, and the cutter shaft is shortened by nearly half compared with the length of a conventional cutter shaft.

All of the manners described herein may be performed in any suitable order. The use of any and all examples, or exemplary language (e.g., "such as") provided herein, is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the invention.

The present invention describes preferred embodiments, including the best mode known to the inventors for carrying out the invention. Variations of these preferred embodiments will, of course, be apparent to those skilled in the art. The inventors expect skilled artisans to employ such variations as appropriate, and the inventors intend for the invention to be practiced otherwise than as specifically described herein. Accordingly, this invention includes all modifications encompassed within the spirit and scope of the invention as defined by the claims. Moreover, unless indicated otherwise or clearly contradicted by context, the present invention includes any of the above-described factors and all possible variations thereof.

Claims

1. The utility model provides a multiaspect milling cutter structure, includes a knife shaft portion and a blade disc portion, blade disc portion detachable sets up in knife shaft portion one end, its characterized in that, blade disc portion includes:

2. A multi-sided milling cutter structure according to claim 1, wherein the cutting tips of the cutter body are connected in a circular shape, the diameter of the circular shape being between 141-143 mm.

3. A multi-face milling cutter structure according to claim 2, wherein the outer diameter of the coupling body is between 41-43 mm.

4. A multi-sided milling cutter structure according to claim 3, wherein the internal diameter of the connecting hole is between 26-28 mm.

5. The face milling cutter structure of claim 4, wherein the acute included angle between the centerline of one of the first key ways and the centerline of the other first key way is between 14-16 °.

6. The multi-sided milling cutter structure of claim 5, wherein the width of the first key slot is between 1.5-2.5mm and the depth of the first key slot is between 3-3.5 mm.

7. The multi-face milling cutter structure of claim 6, wherein a connecting slope is formed between two adjacent cutter bodies, and the connecting slope is recessed toward the inner side of the main disc body between the two cutter bodies.

8. The multi-sided milling cutter structure of claim 7, wherein the cutter body includes adjacent first, second and third facets, the first and second facets being connected end-to-end, the second facet extending in a direction connecting the sloping surfaces, the third facet being connected to the first and second facets, the third facet extending in a direction of an end surface of the cutterhead.

9. The multi-sided milling cutter structure of claim 8, wherein the second and third facets are each obliquely connected to the first facet.

10. The multi-face milling cutter structure of claim 9, wherein the coupling body is provided with a first positioning hole, the cutter shaft portion is provided with a second positioning hole, and the first positioning hole corresponds to the second positioning hole.