CN112893951A

CN112893951A - Large-feed face milling cutter with chip dividing and polishing functions

Info

Publication number: CN112893951A
Application number: CN202110090868.5A
Authority: CN
Inventors: 魏兆成; 郭江; 康仁科; 李秀儒; 王朔
Original assignee: Dalian University of Technology
Current assignee: Dalian University of Technology
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-06-04

Abstract

The invention discloses a large-feed face milling cutter with functions of chip separation and polishing, comprising a cutter body and a plurality of inserts, and the plurality of inserts are evenly distributed along the circumference of the cutter body. The insert is a square indexable insert with 4 cutting edges, each cutting edge consists of two parts, the first part of the cutting edge is a straight cutting edge with a chip groove, and the second part of the cutting edge is a circular arc trimming. blade. The tool designed by the invention has a small main declination angle, which increases the working length of the main cutting edge of the tool, reduces the chip thickness and the load on the unit length of the cutting edge, improves the heat dissipation effect of the tool, and is conducive to realizing high-feed cutting. The chip splitting groove of the high-feed insert of the present invention can realize the chip breaking function, and can effectively reduce the cutting force and improve the tool life through dislocation chip splitting. The wiper edge with large curvature radius of the large-feed blade of the invention can not only obtain better processing quality, but also can greatly reduce the manufacturing error of the tool and the installation error of the blade.

Description

Large-feed face milling cutter with chip dividing and polishing functions

Technical Field

The invention belongs to the technical field of metal cutting, relates to a metal cutting tool, and particularly relates to a large-feed-surface milling tool with chip dividing and polishing functions.

Background

At present, for the field of machining, how to realize high-efficiency, high-quality and low-cost production is an important way for modern enterprises to improve economic benefits. The plane milling is the most basic processing content in the machining, and is widely applied in the actual production, for example, the joint surfaces of parts such as a large impeller case, a compressor case, an automobile panel mould, an engine case and the like need to be subjected to plane processing. The machining allowance of the large parts is large, chips are not easy to discharge in the cutting process, the cutting load is large, a large amount of cutting heat is generated, and the cutting heat is difficult to dissipate, so that the cutting temperature is high, the cutter is seriously abraded, the service life of the cutter is shortened, the cutter is frequently replaced, time and labor are consumed, and the production cost is greatly increased. In addition, in the plane machining, semi-finish machining and finish machining are often required after rough machining, so that the machining time is greatly increased, and the machining efficiency is severely restricted.

Chinese patent CN201510239643.6 proposes a preparation process and a detection method of a double-arc large-feed annular milling cutter, which can control a main deflection angle by controlling the radian of a cutting edge, reduce cutting force, reduce cutting vibration, and further realize large-feed cutting. However, the cutter belongs to an integral milling cutter, and has certain difficulty in high-speed and high-efficiency machining of large parts.

Chinese patent CN201911060436.9 proposes an indexable insert and a tool for plunge milling, which have the advantages of high machining efficiency and good economical efficiency compared with the traditional milling cutter, and the axial and radial cutting forces of the tool are relatively balanced. However, the tool is still stressed greatly during high feed cutting, the tool wears quickly, and chips are not easy to break off. On the other hand, the large feed cutting leaves obvious tool marks, the quality of the processed surface is poor, semi-finishing and finishing procedures are still required to be added, and the improvement on the processing efficiency is limited.

Therefore, the efficient plane machining tool which is beneficial to chip breaking and removal, reduces cutting force and cutting temperature, reduces tool abrasion and prolongs the service life of the tool is designed, and the efficient plane machining tool has important significance for realizing high-quality, efficient and low-cost machining.

Disclosure of Invention

In order to solve the problems in the prior art, the invention aims to design a large-feed-surface milling cutter which is beneficial to chip breaking and removal, reduces cutting force and cutting temperature, reduces cutter abrasion and prolongs the service life of the cutter and has the functions of chip separation and smoothing.

In order to achieve the purpose, the technical scheme of the invention is as follows: the large-feed face milling cutter with the chip dividing and polishing functions comprises a cutter body and a plurality of blades, wherein the blades are large-feed blades, and the blades are uniformly distributed along the circumference of the cutter body.

A plurality of chip grooves are uniformly distributed on the circumferential side surface of the cutter body, and a blade is fixedly mounted on the same side of each chip groove;

the blade is a square indexable blade and is provided with 4 cutting edges, each cutting edge consists of two parts, the cutting edge of the first part is a linear cutting edge with chip dividing grooves, the chip dividing grooves on two adjacent cutting edges are different in position, and the two opposite cutting edges are provided with the chip dividing grooves at the same position. The main cutting edges of the adjacent blades are adjacent cutting edges of the blades, so that chip separating grooves are staggered, and staggered chip separating in the cutting process is realized; the second part cutting edge is an arc-shaped smoothing edge, and the curvature radius of the arc-shaped smoothing edge is larger than 50 mm. The main deflection angle Kr of the large-feeding-surface milling cutter is 10-20 degrees.

Furthermore, the chip dividing groove is a rectangular groove with 0.5 x 1 mm.

Further, each cutting edge of the blade is provided with two chip separating grooves, and the distance delta H3 between the two chip separating grooves on each cutting edge is equal; and if the distance between the intersection point of the straight cutting edge and the circular arc smoothing edge on one cutting edge and the nearest chip dividing groove is delta H1, and the distance between the intersection point of the straight cutting edge and the circular arc smoothing edge on the adjacent cutting edge and the nearest chip dividing groove is delta H2, the delta H1 is not equal to the delta H2, and the difference between the delta H1 and the delta H2 is half of the delta H3.

Furthermore, the chip flutes are curved back-tooth large chip flutes.

Compared with the prior art, the invention has the following advantages:

1. the cutter designed by the invention has a small main deflection angle, so that the working length of a main cutting edge of the cutter is increased, the chip thickness and the load of the cutting edge on unit length are reduced, the heat dissipation effect of the cutter is improved, and the large-feed cutting is favorably realized.

2. The chip dividing groove of the large-feed blade can realize the chip breaking function, and through dislocation chip dividing, the cutting force can be effectively reduced, and the service life of the cutter is prolonged.

3. The large-curvature radius wiper blade of the large-feed blade not only can obtain better processing quality, but also can greatly reduce the manufacturing error of the cutter and the installation error of the blade.

4. When the cutter is used for milling large planes, the machining efficiency can be improved, and meanwhile, the quality of the machined surface is better, so that the cutter has important significance for realizing high-quality, high-efficiency and low-cost machining.

Drawings

FIG. 1 is a three-dimensional view of the present invention.

Fig. 2 is a partial view of fig. 1 at a.

Fig. 3 is a three-dimensional view of a macro-feed blade of the present invention.

Fig. 4 is a two-dimensional view of a macro-feed blade of the present invention.

Fig. 5 is a schematic diagram of the large feed blade dislocation chip separation of the present invention.

In the figure: 1. the cutter body 2, the blade 3, the chip groove 4, the main cutting edge 5, the straight line cutting edge 6, the chip dividing groove 7 and the circular arc smoothing edge.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or components having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

As shown in fig. 1-5, a large-feed face milling cutter with chip dividing and smoothing functions comprises a cutter body 1 and a plurality of blades 2, wherein the blades 2 are large-feed blades 2, and the plurality of blades 2 are uniformly distributed along the circumference of the cutter body 1;

a plurality of chip grooves 3 are uniformly distributed on the circumferential side surface of the cutter body 1, and a blade 2 is fixedly arranged on the same side of each chip groove 3;

the cutting insert 2 is a square indexable cutting insert and is provided with 4 cutting edges, each cutting edge consists of two parts, the first part of the cutting edge is a linear cutting edge 5 with a chip dividing groove 6, the chip dividing grooves 6 on two adjacent cutting edges are different in position, and two opposite cutting edges are provided with the chip dividing grooves 6 at the same position; the main cutting edge 4 of the adjacent blade is the cutting edge adjacent to the main cutting edge 4 of the blade, so that chip separating grooves 6 are staggered with each other, and staggered chip separation in the cutting process is realized; the second part cutting edge is a circular arc polishing edge 7, and the curvature radius of the circular arc polishing edge 7 is larger than 50 mm. The main deflection angle Kr of the large-feeding-surface milling cutter is 10-20 degrees.

Furthermore, the chip dividing groove 6 is a rectangular groove with 0.5 × 1 mm.

Further, each cutting edge of the blade 2 has two chip dividing grooves 6, and the distance Δ H3 between the two chip dividing grooves 6 on each cutting edge is equal; if the distance between the intersection point of the straight cutting edge 5 and the circular arc smoothing edge 7 on one cutting edge and the nearest chip dividing groove 6 is Δ H1, and the distance between the intersection point of the straight cutting edge 5 and the circular arc smoothing edge 7 on the adjacent cutting edge and the nearest chip dividing groove 6 is Δ H2, Δ H1 is not equal to Δ H2, and the difference between Δ H1 and Δ H2 is half of Δ H3.

Further, the chip flutes 3 are curved back-of-tooth large chip flutes.

The examples of the invention are as follows: as shown in fig. 1, a large-feed face milling cutter with chip dividing and smoothing functions comprises a cutter body 1 and a plurality of large-feed blades 2, wherein the blades 2 are uniformly distributed along the circumferential direction of the cutter body 1. The cutter is designed to have a small main deflection angle Kr equal to 15 degrees, as shown in fig. 2, the working length of the main cutting edge 4 can be increased, the cutting thickness and the load on the unit length of the cutting edge can be reduced, the heat dissipation effect of the cutter can be improved, and the large-feed cutting function can be realized; the chip groove 3 is a curved tooth back large chip groove, and can smoothly discharge a large amount of chips generated in the large-feed cutting process along the position so as to smoothly carry out cutting.

As shown in fig. 3-4, the cutting edge of the large feed insert 2 is composed of two parts, the first part is a straight cutting edge 5 and two chip dividing grooves 6 are milled, the cutting edges on two opposite sides of the same insert 2 have the chip dividing grooves 6 at the same position, and the chip dividing grooves 6 on two adjacent cutting edges are different in position. The main cutting edge 4 of the adjacent blade 2 adopts the cutting edge adjacent to the blade 2, and after installation, four chip separating grooves 6 are uniformly distributed in the axial direction of the cutter, namely two chip separating grooves 6 of the blade 2 and two chip separating grooves 6 of the adjacent blade 2 (as shown in figure 5), so that the strength of the blade 2 can be improved while dislocation chip separation is effectively realized. The combination of the chip dividing groove 6 and the staggered chip dividing is more beneficial to chip breaking, cutting load and cutter abrasion are reduced, the service life of the cutter is prolonged, and the large-feed cutting is facilitated. The second part is an arc-shaped smoothing edge 7 with the diameter of 100mm, so that not only can better processing quality be obtained, but also the manufacturing error of the cutter and the installation error of the blade 2 can be greatly reduced.

Claims

1. The utility model provides a big feed face milling cutter with divide bits and repairment function which characterized in that: the cutter comprises a cutter body (1) and a plurality of blades (2), wherein the blades (2) are large-feed blades (2), and the blades (2) are uniformly distributed along the circumference of the cutter body (1);

a plurality of chip grooves (3) are uniformly distributed on the circumferential side surface of the cutter body (1), and a blade (2) is fixedly mounted on the same side of each chip groove (3);

the cutting insert (2) is a square indexable cutting insert and is provided with 4 cutting edges, each cutting edge consists of two parts, the first part of the cutting edge is a linear cutting edge (5) with a chip dividing groove (6), the chip dividing grooves (6) on two adjacent cutting edges are different in position, and two opposite cutting edges are provided with the chip dividing grooves (6) at the same position; the main cutting edge (4) of the adjacent blade is the cutting edge adjacent to the main cutting edge (4) of the blade, so that chip separating grooves (6) are staggered with each other, and staggered chip separation in the cutting process is realized; the second part of cutting edge is an arc-shaped polishing edge (7), and the curvature radius of the arc-shaped polishing edge (7) is more than 50 mm; the main deflection angle Kr of the large-feeding-surface milling cutter is 10-20 degrees.

2. The large feed face milling cutter tool with chip dividing and finishing functions as claimed in claim 1, wherein: the chip dividing groove (6) is a rectangular groove with 0.5 x 1 mm.

3. The large feed face milling cutter tool with chip dividing and finishing functions as claimed in claim 1, wherein: each cutting edge of the blade (2) is provided with two chip separating grooves (6), and the distance delta H3 between the two chip separating grooves (6) on each cutting edge is equal; if the distance between the intersection point of the straight cutting edge (5) and the circular arc smoothing edge (7) on one cutting edge and the nearest chip dividing groove (6) is delta H1, and the distance between the intersection point of the straight cutting edge (5) and the circular arc smoothing edge (7) on the adjacent cutting edge and the nearest chip dividing groove (6) is delta H2, the delta H1 is not equal to the delta H2, and the difference between the delta H1 and the delta H2 is half of the delta H3.

4. The large feed face milling cutter tool with chip dividing and finishing functions as claimed in claim 1, wherein: the chip pocket (3) is a curve tooth back large chip pocket.