CN209792712U

CN209792712U - Unequal arc-shaped groove hard alloy milling cutter

Info

Publication number: CN209792712U
Application number: CN201920643425.2U
Authority: CN
Inventors: 陈国兵; 陈琪
Original assignee: Wenling Shengyuan Cnc Technology Co Ltd
Current assignee: Wenling Shengyuan Cnc Technology Co Ltd
Priority date: 2019-05-07
Filing date: 2019-05-07
Publication date: 2019-12-17
Anticipated expiration: 2029-05-07

Abstract

The utility model provides an unequal arc wall carbide milling cutter belongs to work load cutting tool technical field. The milling cutter solves the problems that the existing milling cutter is easy to resonate, a chip removal groove is usually a square groove, and chip removal is not smooth enough. This unequal arc groove carbide milling cutter, handle of a knife and the portion of milling that sets up including the integral type structure, 4 edges that the contained angle of edge is the same all are seted up on the terminal surface of the portion of milling, the variation in size and the width proportion of every two adjacent edges are 2 to 1, 4 edges are central symmetry, it has spiral helicine cutting edge to distribute in the portion of milling, form the chip groove between every two adjacent cutting edges, the bottom surface of chip groove is ARC structure, this ARC structure includes that two meet and are 90 degrees circular arc alpha and circular arc beta, and circular arc alpha's radius forms the not equidistance chip groove in both sides for circular arc beta radial half. The utility model has the advantages of more smooth chip removal and convenient manufacture without resonance.

Description

Unequal arc-shaped groove hard alloy milling cutter

Technical Field

The utility model belongs to the technical field of the work volume cutting tool, a milling cutter is related to, in particular to divide arc wall carbide milling cutter not equally.

Background

A milling cutter is a rotary cutter for milling having one or more teeth, each of which intermittently cuts off the allowance of a workpiece in sequence during operation, and is mainly used for machining planes, steps, grooves, formed surfaces, cutting off workpieces, and the like on a milling machine. In the existing milling cutter, as the discrete milling cutter with unequal spirals is disclosed as application number 201620802079.4, the helix angles of two adjacent spiral chip removal grooves of the milling cutter are unequal, the included angles of two adjacent end tooth cutting edges are unequal, and the included angles of two diagonal end tooth cutting edges are equal, so that the problem of high-feed machining resonance is solved, but the helix angles and the cutting edges of the chip removal grooves are unequal, so that a grinding wheel is inconvenient to polish during manufacturing, the structure of the chip removal grooves is not disclosed in the patent, and the conventional chip removal grooves on the market are usually square grooves, so that chip removal is not smooth enough.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a chip removal more smoothly and make convenient not partition arc wall carbide milling cutter that can not produce resonance.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides an unequal arc wall carbide milling cutter, includes handle of a knife and the portion of milling that the integral type structure set up, its characterized in that, set up 4 edges that the contained angle is the same on the terminal surface of the portion of milling, the variation in size and the width proportion of every two adjacent edges are 2 to 1, 4 edges are central symmetry, the portion of milling on distribute and have spiral helicine cutting edge, form the chip groove between every two adjacent cutting edges, the bottom surface of chip groove is ARC structure, and this ARC structure includes that two meet and be 90 degrees circular arc alpha and circular arc beta, and circular arc alpha's radius forms the not equidistance chip groove in both sides for circular arc beta radial half.

In the above unequal arc groove cemented carbide milling cutter, the helix angle of the flute is 42 degrees.

In the unequal arc-shaped groove hard alloy milling cutter, the cutting edge is arranged in a radial inclined over-center manner, and two cutting edges of the cutting edge are in an arc surface structure.

Compared with the prior art, the unequal arc-shaped groove hard alloy milling cutter has the advantages that: 1. the design of the over-center cutting edge is adopted, so that the requirement of finish machining axial feed can be met, and the slope milling and spiral interpolation milling performances are enhanced; 2. the adjacent cutting edges are different in size and the chip grooves are not equidistant, so that the vibration of the cutter can be reduced, the resonance is avoided in high-feed machining, and the surface machining quality is improved; 3. the bottom surface of the chip removal groove is formed by connecting two arcs with different radiuses and 90 degrees, so that chip removal is smoother, and the grinding wheel machining is easy.

Drawings

Fig. 1 is a schematic structural diagram of the unequal arc-shaped groove hard alloy milling cutter.

Fig. 2 is a view showing an end face structure of a milling portion of the present milling cutter.

Fig. 3 is a structural schematic view of the milling part of the milling cutter.

Fig. 4 is a schematic view of the cambered surface structure of the bottom surface of the chip groove.

In the figure, 1, a knife handle; 2. a milling section; 3. cutting edges; 3a, a blade face; 4. a blade; 5. a chip groove.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 4, the unequal arc-shaped groove hard alloy milling cutter comprises a cutter handle 1 and a milling part 2 which are arranged in an integrated structure, wherein 4 cutting edges 3 with the same cutting edge angle are arranged on the end surface of the milling part 2, each two adjacent cutting edges 3 are different in size and have the width ratio of 2 to 1, the 4 cutting edges 3 are in central symmetry, spiral cutting edges 4 are distributed on the milling part 2, a chip discharge groove 5 is formed between each two adjacent cutting edges 4, the bottom surface of the chip discharge groove 5 is of an arc surface structure, the arc surface structure comprises two arc alpha and arc beta which are connected with each other and are 90 degrees, and the radius of the arc alpha is half of the radius of the arc beta to form the chip discharge grooves 5 with unequal distances on two sides.

Further saying, the helix angle of chip groove 5 is 42 degrees, and blade 3 is the setting of crossing the heart for radial slope, and two cutting surfaces 3a of blade 3 are cambered surface structure, and this design has excellent wear resistance, can reduce the condition that crescent wearing and tearing, cutting edge 4 notch and back knife face wearing and tearing appear in the cutter.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms shank 1, milling portion 2, cutting edge 3, land 3a, cutting edge 4, chip flute 5, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. The utility model provides an unequal arc wall carbide milling cutter, includes handle of a knife (1) and the portion of milling (2) that the integral type structure set up, its characterized in that, mill and set up 4 blade (3) that the contained angle is the same on the terminal surface of portion (2), the variation in size and the width proportion of every two adjacent blade (3) are 2 to 1, 4 blade (3) are central symmetry, the portion of milling (2) on distribute and have spiral helicine cutting edge (4), form chip groove (5) between every two adjacent cutting edge (4), the bottom surface of chip groove (5) is ARC structure, and this ARC structure includes that two meet and are 90 degrees circular arc alpha and circular arc beta, and circular arc alpha's radius forms the not equidistance chip groove (5) that vary on both sides for circular arc beta radial half.

2. The milling cutter for cemented carbide according to claim 1, characterized in that the helix angle of the flutes (5) is 42 degrees.

3. The milling cutter according to claim 1, wherein the cutting edge (3) is radially inclined and over-centered, and the two cutting faces (3 a) of the cutting edge (3) are cambered.