CN220445147U

CN220445147U - Milling cutter processing protection machanism

Info

Publication number: CN220445147U
Application number: CN202321844786.6U
Authority: CN
Inventors: 周静波; 陈保文
Original assignee: Suzhou San Jun Tools Technology Co ltd
Current assignee: Suzhou San Jun Tools Technology Co ltd
Priority date: 2023-07-14
Filing date: 2023-07-14
Publication date: 2024-02-06
Anticipated expiration: 2033-07-14

Abstract

The utility model relates to the technical field of milling cutters and discloses a milling cutter processing protection mechanism which comprises a connector, wherein a plurality of cutting edges are arranged on the connector, tip inclined surfaces are arranged on the end faces of the cutting edges, a protection angle is arranged at the tip positions of the cutting edges, a first transition area is arranged between the protection angle and the tip inclined surfaces, and a second transition area is arranged between the protection angle and the tip surfaces of the cutting edges.

Description

Milling cutter processing protection machanism

Technical Field

The utility model relates to the technical field of milling cutters, in particular to a milling cutter machining protection mechanism.

Background

The milling cutter is a rotary cutter with one or more cutter teeth, which is used for milling, and each cutter tooth sequentially removes the allowance of a machined part at intervals in the machining process of a machine tool to mill the workpiece. Milling cutters are commonly used on machine tools to machine flats, steps, grooves, form surfaces, sever workpieces, etc.

At present, the Chinese patent application number 202222998185.2 discloses a tungsten steel end mill for enhancing the protection of a cutter point, the cutter point is divided into two connecting parts, a first connecting part contacted with a workpiece adopts a smooth plane, the contact area of the cutter point and the workpiece is increased, the damage of the cutter point is reduced, but when the contact area is larger, the resistance of the milling cutter during processing is larger, the milling efficiency is reduced, and the surface quality of the workpiece processing is influenced.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide a milling cutter processing protection mechanism which is not easy to damage a cutter point while ensuring milling property.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a milling cutter processing protection machanism, includes the connector, be provided with a plurality of cutting edges on the connector, be provided with the knife tip inclined plane on the terminal surface of cutting edge, the knife tip department of cutting edge is provided with the protection angle, be provided with transition zone one between protection angle and the knife tip inclined plane, be provided with transition zone two between the knife face of protection angle and cutting edge.

The utility model is further provided with: the protection angle is a round angle, and the diameter of the protection angle is 2% of the diameter of the periphery of the blade.

The utility model is further provided with: the transition zone I and the end face of the cutting edge form an excessive angle I, the excessive angle I is a negative front angle, and the excessive angle I is set to be 2 degrees.

The utility model is further provided with: the transition area II and the cutter surface of the cutter edge form a transition angle II, the transition angle II is a positive front angle, and the transition angle II is set to be 2 degrees.

The utility model is further provided with: the helix angle of the blade is 30 degrees, the rake angle is 7 degrees, and the relief angle is 11 degrees.

The utility model has the advantages that:

1. the protection angle is arranged at the cutter point and is changed into a round angle, so that the design of gradual change front angle is realized, the milling performance is gradually improved, the diameter of the protection angle is smaller, the resistance of the milling cutter during processing is not greatly improved, the milling performance of the milling cutter can be ensured, the stable mechanical property of the round angle is utilized, the pressure applied to the contact part of the cutter point and a workpiece is reduced, the shock resistance and the wear resistance of the cutter point are improved, and the damage risk of the cutter point is reduced while the milling performance is considered;

2. a transition zone I is arranged between the protection angle and the end face of the cutting edge, and the transition zone I formed between the transition zone I and the end face of the cutting edge is designed as a negative rake angle, so that the contact strength of the protection angle starting surface and the transition zone between the protection angle and the inclined face of the cutting tip is enhanced, the risk of breakage of the end face of the cutting edge is reduced, and the service life of the milling cutter is prolonged;

3. the transition zone II is arranged between the protection angle and the cutter surface of the cutter edge, and the transition angle II formed between the transition zone II and the cutter surface is designed as a positive rake angle, so that the milling performance of the transition zone II is improved, and the risk of breakage of the transition zone II is reduced.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a schematic view of a blade structure according to the present utility model;

FIG. 3 is an enlarged view of portion A of FIG. 1;

in the figure: 1. a connector; 2. a blade; 3. protecting the corners; 4. a knife tip inclined plane; 5. a first transition zone; 6. a transition zone II; B. helix angle; C. a front angle; D. a rear corner; E. transition angle I; F. and a transition angle II.

Detailed Description

It should be noted that, without conflict, the embodiments and features of the embodiments in the present application may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.

In the present utility model, unless otherwise indicated, the terms "upper" and "lower" are used generally with respect to the directions shown in the drawings, or with respect to the vertical, vertical or gravitational directions; also, for ease of understanding and description, "left, right" is generally directed to the left, right as shown in the drawings; "inner and outer" refer to inner and outer relative to the outline of the components themselves, but the above-described orientation terms are not intended to limit the present utility model.

Referring to fig. 1-3, the present utility model provides the following technical solutions:

the utility model provides a milling cutter processing protection machanism, including connector 1, be provided with a plurality of cutting edges 2 on the connector 1, be provided with knife tip inclined plane 4 on the terminal surface of cutting edge 2, can prevent that the terminal surface of cutting edge 2 from touching with the work piece bottom surface top, and be favorable to the discharge of sweeps, the knife tip department of cutting edge 2 is provided with protection angle 3, has changed the contact surface of knife tip and work piece, plays the effect of protection knife tip, is provided with transition zone one 5 between protection angle 3 and the knife tip inclined plane 4, is provided with transition zone two 6 between the knife face of protection angle 3 and cutting edge 2.

The protection angle 3 is a round angle, the diameter of the protection angle 3 is 2% of the diameter of the edge 2, the sharp angle of the edge 2, which is contacted with a workpiece, is a round angle, and the stable mechanical property of the arc is utilized, so that the pressure applied to the knife point is reduced, and the impact resistance and the wear resistance of the knife point are improved; the protection angle 3 is designed as a gradual change rake angle, has smaller diameter, has small contact area with a workpiece, hardly affects the resistance of the cutting edge 2, and ensures the milling performance of the milling cutter.

The transition zone I5 and the end face of the blade 2 form a transition angle I E, the transition angle I E is a negative front angle, the transition angle I E is set to be 2 degrees, the contact strength of the initial face of the protection angle 3 and the transition zone between the protection angle 3 and the blade tip inclined face 4 is enhanced, and the risk of breakage is reduced.

The transition area II 6 and the cutter surface of the cutter edge 2 form a transition angle II F, the transition angle II F is a positive front angle, the transition angle II F is set to be 2 degrees, the contact strength of the end surface of the protection angle 3 is enhanced, the risk of breakage is reduced, the milling of the end of the protection angle 3 is smoother due to the arrangement of the positive front angle, and the milling performance of the protection angle 3 is improved.

The helix angle B of the blade 2 is 30 degrees, so that the chip removal performance and the overall rigidity of the blade 2 are improved; the front angle C of the cutting edge 2 is 7 degrees, so that the cutting edge of the cutting edge 2 is sharp and is not easy to collapse; the back angle D of the blade 2 is 11 degrees, so that the cutter teeth are ensured to have enough strength, and the wear resistance is improved.

Specifically, the protection angle 3 is arranged at the cutter point, the cutter point is changed into a round angle, the design is a gradual change front angle, the milling performance of the cutter point is gradually improved, the diameter of the protection angle 3 is smaller, the milling performance of the cutter point can be ensured due to small improvement of the resistance of the cutter point during the milling process, the stable mechanical property of the round angle is utilized, the pressure born by the contact part of the cutter point and a workpiece is reduced, the shock resistance and the wear resistance of the cutter point are improved, and the damage risk of the cutter point is reduced while the milling performance is considered;

a transition zone I5 is arranged between the protection angle 3 and the end face of the cutting edge 2, and a transition angle I E formed between the transition zone I5 and the end face of the cutting edge 2 is designed as a negative rake angle, so that the contact strength of the initial face of the protection angle 3 and the transition zone between the protection angle 3 and the cutter tip inclined face 4 is enhanced, the risk of breakage of the end face of the cutting edge 2 is reduced, and the service life of the milling cutter is prolonged;

a transition zone II 6 is arranged between the protection angle 3 and the cutter surface of the cutter edge 2, and a transition angle II F formed between the transition zone II 6 and the cutter surface is designed as a positive rake angle, so that the milling performance of the transition zone II 6 is improved, and the risk of breakage of the transition zone II 6 is reduced.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a milling cutter processing protection machanism, includes connector (1), be provided with a plurality of cutting edges (2) on connector (1), its characterized in that: the novel knife edge is characterized in that a knife tip inclined surface (4) is arranged on the end surface of the knife edge (2), a protection angle (3) is arranged at the knife tip of the knife edge (2), a first transition area (5) is arranged between the protection angle (3) and the knife tip inclined surface (4), and a second transition area (6) is arranged between the protection angle (3) and the knife surface of the knife edge (2).

2. The milling cutter machining protection mechanism according to claim 1, wherein: the protection angle (3) is a round angle, and the diameter of the protection angle (3) is 2% of the diameter of the periphery of the cutting edge (2).

3. The milling cutter machining protection mechanism according to claim 2, wherein: the transition zone I (5) and the end face of the cutting edge (2) form an excessive angle I (E), the excessive angle I (E) is a negative rake angle, and the excessive angle I (E) is set to be 2 degrees.

4. A milling cutter machining prevention mechanism according to claim 3, wherein: the transition zone II (6) and the cutter surface of the cutter edge (2) form a transition angle II (F), the transition angle II (F) is a positive rake angle, and the transition angle II (F) is set to be 2 degrees.

5. The milling cutter machining prevention mechanism according to claim 4, wherein: the helix angle (B) of the blade (2) is 30 DEG, the rake angle (C) is 7 DEG, and the relief angle (D) is 11 deg.