CN112620760B

CN112620760B - Combination milling cutter with PCD insert and micro blade

Info

Publication number: CN112620760B
Application number: CN202011444125.5A
Authority: CN
Inventors: 樊俊峰; 王福吉; 张博宇; 李跃; 姜向何
Original assignee: Blue Whale Technology Shenzhen Co ltd
Current assignee: Blue Whale Technology Shenzhen Co ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2023-03-14
Anticipated expiration: 2040-12-08
Also published as: CN112620760A

Abstract

The application discloses gang cutter with PCD splice piece and little sword includes: the PCD insert is arranged on the cutter body; the cutter body is provided with a plurality of main cutting edges, main chip grooves are formed among the main cutting edges, and the vertical sections of the main chip grooves in the extending direction of the main chip grooves are arc-shaped or V-shaped; a PCD inlaid piece is embedded at the front end of part of the main cutting edge; wherein the flank face not provided with the main cutting edge of the PCD insert is provided with a micro-blade. The application provides a technical scheme can guarantee to increase substantially the life-span of milling cutter under processingquality's the prerequisite.

Description

Combination milling cutter with PCD insert and micro blade

Technical Field

The present application relates to a gang mill with PCD inserts and micro-blades.

Background

In the related art, compared with metal materials, new materials such as carbon fiber reinforced resin matrix Composite (CFRP) have the performance advantages of high specific strength, fatigue resistance, corrosion resistance, strong bearing capacity and the like, so the CFRP becomes a preferable material for carrying equipment and weight reduction and efficiency improvement in the fields of aerospace transportation and the like. After the carbon fiber composite material component used in aerospace equipment is laid, cured and formed, secondary processing is needed to meet the requirement of assembly size, and milling is one of the main processing modes. However, carbon fiber composite materials are typically difficult to process, and a main cutting edge milling cutter or a spiral edge milling cutter which is widely used in metal processing is easy to cause damage to the surface layer of the CFRP, such as tearing, burring and the like, after the cutter is dull-ground. At present, the CFRP is milled by using a micro-blade milling cutter. However, due to the structural characteristics of the micro-edge milling cutter, a chip removal groove is small, the CFRP processing working condition belongs to continuous processing with large cutting amount, so that the heat dissipation capacity is poor, the quality guarantee life of the cutter is directly greatly shortened, and although the service life of the micro-edge milling cutter can be prolonged to a certain extent through a coating process, the service life of the milling cutter is still limited by heat dissipation. Meanwhile, the micro-blade milling cutter enables cutting edges to be micro-diversified, so that the cutting force is reduced to a certain extent, but the micro-blade is easy to damage, and the cutter is scrapped in advance. Therefore, in order to combine the advantages of the milling cutter with the main cutting edge, such as high cutter body strength, good chip removal and effective inhibition of the micro-blade milling cutter on the damage of the CFRP surface layer, the milling cutter with the micro-blade and the main cutting edge in the structure is designed, and the milling cutter with the micro-blade and the main cutting edge in the coexistence is of great significance in prolonging the service life of the special machining cutter for the CFRP.

In order to solve the problems of fast tool wear and low processing efficiency in the traditional milling cutter processing CFRP, the invention discloses a staggered PCD milling cutter and a method for processing reinforced fiber composite materials in patent No. 201610271696.0 and university of Harbin Chen Tao and the like, and provides a technical scheme that four milling blade grooves and four chip grooves are arranged at the front end of the outer circumferential surface of a hard alloy cutter body, and the milling life of a main cutting edge milling cutter is prolonged by embedding PCD blades. The invention discloses a method for designing micro-tooth arrangement for inhibiting damage of the edge of a cutting edge of a multi-edge micro-tooth milling cutter, which is invented by 201810495696.8, gu Zhenyuan of university of great continence and the like, wherein the cutting thickness of the edge part of the micro-tooth is reduced by overlapping the edge parts of the cutting edges and not overlapping the middle of the micro-tooth, so that the edge of the micro-tooth is effectively protected. The solution proposed by the invention does not comprehensively consider the service life of the cutter and the milling quality, and the processing problem of greatly prolonging the service life of the milling cutter on the premise of ensuring the processing quality is not solved at all.

Disclosure of Invention

In order to overcome the problems in the related art, the combined milling cutter with the PCD insert and the micro blade is provided, and the service life of the milling cutter can be greatly prolonged on the premise of ensuring the processing quality.

In order to solve the technical problem, the technical scheme adopted by the application is as follows:

a gang cutter with PCD inserts and micro-blades, comprising: the PCD insert is arranged on the cutter body; the cutter body is provided with a plurality of main cutting edges, and main chip grooves are formed among the main cutting edges; a PCD inlaid piece is embedded at the front end of part of the main cutting edge; wherein the flank face not provided with the main cutting edge of the PCD insert is provided with a micro-edge.

Preferably, little sword includes little sword of levogyration and the little sword of dextrorotation, the levogyration little sword with the little sword of dextrorotation is the spiral in turn set up in the periphery of cutter body sets up in turn the little sword of levogyration with little sword of dextrorotation is constituteed little sword bead, little sword bead interval set up in the periphery of cutter body.

Preferably, the cutting edge length ratio of the left-handed micro blade to the right-handed micro blade is 1.25.

Preferably, the cutting edge length ratio of the left-handed micro blade to the right-handed micro blade is 1.5.

Preferably, the left-handed micro blades arranged at intervals coincide with the cutting range of the right-handed micro blades.

Preferably, the cutting range formed by the right-handed micro blades and the left-handed micro blades which are arranged on the same micro blade rib at intervals covers the cutting range of one right-handed micro blade on the adjacent micro blade rib.

Preferably, the rake angle and the relief angle of the left-handed micro blade and the right-handed micro blade range between 5 ° and 15 °.

Preferably, the rake angle of the left-handed micro blade/the right-handed micro blade is smaller than the relief angle of the left-handed micro blade/the right-handed micro blade.

Preferably, the perpendicular section of the main chip groove in the extending direction is in a circular arc shape or a V shape.

Preferably, the PCD insert has a thickness of no less than 2mm.

The technical scheme that this application provided can include following beneficial effect, provides a gang cutter with PCD inserted piece and little sword, includes: the PCD insert is arranged on the cutter body; the cutter body is provided with a plurality of main cutting edges, and main chip grooves are formed among the main cutting edges; a PCD inlaid piece is embedded at the front end of part of the main cutting edge; wherein the flank face not provided with the main cutting edge of the PCD insert is provided with a micro-blade. The service life of the milling cutter can be greatly prolonged on the premise of ensuring the processing quality by using the combined milling cutter.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application, as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.

Fig. 1 is a schematic view 1 of the overall structure shown in embodiment 1 of the present application.

Fig. 2 is a schematic view 2 of the overall structure shown in embodiment 1 of the present application.

Fig. 3 is a detailed enlarged schematic view of a part marked by K in fig. 2, which is shown in embodiment 1 of the present application.

Fig. 4 is a schematic cross-sectional view of a left-handed chisel shown in example 1 of the present application.

Fig. 5 is a schematic cross-sectional view of a right-handed chisel shown in example 1 of the present application.

Fig. 6 isbase:Sub>A schematic view of the slicing process atbase:Sub>A point marked asbase:Sub>A-base:Sub>A in fig. 2 according to embodiment 1 of the present application.

Fig. 7 is a detailed enlarged schematic view of a portion marked as M in fig. 6, which is shown in embodiment 1 of the present application.

Fig. 8 is a schematic view 3 of the overall structure shown in embodiment 1 of the present application.

Fig. 9 is a schematic view 4 of the overall structure shown in embodiment 1 of the present application.

Fig. 10 is a schematic view 5 of the overall structure shown in embodiment 1 of the present application.

Description of the reference numerals

Numbering	Name (R)	Numbering	Name (R)
				I	First micro-blade region	h1	Edge length of left-handed micro-blade
II	Second micro-blade region	1	Knife body
				θ	Diameter of the tool	2	PCD inlaid chip
φ	Core diameter		3					Main cutting edge
				γ1	Rake angle of PCD insert	A	First right-handed micro blade
α1	Relief angle of PCD insert	A1	The upper end of the first right-handed micro blade
				γ2	Rake angle of main cutting edge	A2	The lower end of the first right-handed micro blade
α2	Relief angle of main cutting edge	B	Second right-handed micro blade
				h	Maximum depth of end edge chip groove	B1	The upper end of the second right-handed micro blade
n1	Right hand micro blade helix angle	B2	The lower end of the second right-handed micro blade
				n2	Left-handed micro-blade helix angle	C	First left-handed micro blade
H	Distance from cut-off position of peripheral edge chip groove to end part	C1	Upper end of the first left-handed micro blade
				w1	Edge length of right-handed micro-blade	C2	Lower end of first left-handed micro blade
w2	Flute width of left-handed micro blade

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 or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments.

Example 1

A gang cutter with PCD inserts and micro-blades comprising: the PCD insert is arranged on the cutter body; the cutter body is provided with a plurality of main cutting edges, main chip grooves are formed among the main cutting edges, and the vertical sections of the main chip grooves in the extending direction of the main chip grooves are arc-shaped or V-shaped; a PCD inlaid piece is embedded at the front end of part of the main cutting edge; wherein the flank face not provided with the main cutting edge of the PCD insert is provided with a micro-blade; the above structure has the advantages that most of the machining allowance is removed by the plurality of main cutting edges, and the PCD insert arranged on the main cutting edges can still keep a sharper state under the action of larger impact of interrupted cutting due to the wear resistance of the PCD insert. The surface layer damage of the CFRP workpiece is not obviously inhibited only by arranging the main cutting edges, so that the surface layer burrs need to be removed by adopting the micro-blades arranged on the rear cutter surfaces of the two symmetrical main cutting edges. The main cutting edge that is equipped with little sword in this application sets up with the main cutting edge interval that does not establish little sword, consequently little sword only need cut the material at main cutting edge after to few surplus and burr get rid of, consequently makes the life-span of little sword obviously improve.

The two main cutting edges embedded with the PCD inlaid pieces are provided with PCD inlaid piece mounting grooves, and the tool nose of the PCD inlaid piece is positioned on the radial central line of the tool body, so that the tool body is kept stable during machining.

In this embodiment, little sword sets up in the back knife face of the main cutting edge who does not establish the PCD empiecement, little sword includes the little sword of levogyration and the little sword of dextrorotation, the levogyration a little sword with the little sword of dextrorotation is spiral in turn set up in the periphery of cutter body sets up in turn the little sword of levogyration with little sword of dextrorotation is constituteed little sword bead, little sword bead interval set up in the periphery of cutter body, the back knife face symmetry of the main cutting edge who establishes the PCD empiecement is equipped with levogyration sword and dextrorotation sword.

In this embodiment, the cutting ranges of the left-handed micro blades and the right-handed micro blades which are arranged at intervals coincide, and the cutting range formed by the right-handed micro blades and the left-handed micro blades which are arranged on the same micro blade rib at intervals covers the cutting range of one right-handed micro blade on the adjacent micro blade rib; now, the above-mentioned structure will be described with reference to the accompanying drawings, as shown in fig. 4, the first right-handed micro blade a includes a first upper right-handed micro blade A1 and a first lower right-handed micro blade A2, the second right-handed micro blade B includes a second upper right-handed micro blade B1 and a second lower right-handed micro blade B2, and the first left-handed micro blade C includes a first upper left-handed micro blade C1 and a first lower left-handed micro blade C2, which is advantageous in that, for the micro blade part, the cutting edge of the first right-handed micro blade a ranges from A1 to A2, the cutting edge of the second right-handed micro blade B ranges from B1 to B2, and the cutting edge of the first left-handed micro blade C ranges from C1 to C2,

after the cutting edges A1-A2 provided by the first right-handed cutting edge A cut off the materials, the cutting edges B1-B2 provided by the second right-handed cutting edge B and the cutting edges C1-C2 provided by the first left-handed cutting edge C continue to further remove the materials. In the present application, the cutting ranges of the sections B1-B2 and C1-C2 should cover the sections A1-A2, i.e. as long as C1 is ensured above A1 and B2 is ensured below the line A2. Meanwhile, when the cutting speed is 3000 revolutions, the first left-handed cutting edge C and the first right-handed cutting edge A and the second right-handed cutting edge B form a shearing effect, so that the materials are more thoroughly removed. The structure ensures that the blade tip of the easily-tipping blade is protected when the second right-handed micro blade B cuts into a workpiece, so that the service life of the cutter is prolonged, n5 is a rear angle of the right-handed micro blade, n6 is a front angle of the re-handed micro blade, n7 is a front angle of the left-handed micro blade, wherein the front angle n6 of the right-handed micro blade is 5 degrees, and the rear angle of the right-handed micro blade is 10 degrees; the front angle of the left-handed micro blade is 5 degrees, the width w1 of the micro teeth is 1.44mm, the width w2 of the left-handed chip removal groove is 0.96mm, and the width h1 of the left-handed micro blade is 1.04mm.

In this application, the clearance angle of the little sword of levogyration and the little sword of dextrorotation is slightly greater than the rake angle and can reduce the cutter wearing and tearing to, promote the intensity of cutting edge.

In this embodiment, the cutting edge length ratio of the left-handed micro blade to the right-handed micro blade is 1.5, and the left-handed micro blade and the right-handed micro blade according to the above ratio can be more conveniently arranged on the premise of meeting the above requirements.

In this embodiment, the range of the front angle and the rear angle of the left-handed micro blade and the right-handed micro blade is 5 degrees to 15 degrees, and the left-handed micro blade and the right-handed micro blade with the above angles have a better processing effect.

In the present embodiment, the enlarged M region is shown in fig. 8, the cutter body 1 and the PCD insert 2, the cutter parameters, the rake angle γ 1 of the PCD insert, the relief angle α 1 of the PCD insert, the rake angle γ 2 of the main cutting edge, and the relief angle α 2 of the main cutting edge should be designed to be between 5 ° and 15 °, and the thickness of the PCD insert depends on the machining load, and in general, the thickness of the PCD insert is not less than 2mm.

The cutting speed of the combined milling cutter with the PCD insert and the micro blade, which is proposed in the application, is recommended to be 4000-6000rpm/min, the feeding speed is 300-800mm/min, the cutting depth is any depth, and the cutting condition is preferably MQL aerial fog lubrication cutting or air cooling cutting.

The combined milling cutter with the PCD insert and the micro blade, which is provided by the application, is adopted, wherein the cutter body is made of hard alloy without a coating, and the processing parameters are as follows: dry cutting, no cooling, spindle speed 4000rpm, feed speed 300mm/min and cut thickness 2mm. The processed workpiece is a T800 CFRP laminated plate, and the thickness of the material is 4mm. After 27 m of continuous machining is carried out, the surface roughness after machining is not higher than 0.7 mu m through practical measurement by using an ALICONA three-dimensional appearance instrument, and compared with the surface roughness after machining of a common milling cutter, the surface roughness is 3.3 mu m, the service life of the milling cutter can be greatly prolonged on the premise of ensuring the machining quality.

In the description of the specification, references to the description of the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is a more detailed description of the present application in connection with specific embodiments thereof, and it is not intended that the present application be limited to the specific embodiments thereof. It will be apparent to those skilled in the art from this disclosure that many more simple derivations or substitutions can be made without departing from the spirit of the disclosure.

Claims

1. A gang cutter with PCD inserts and micro-blades, comprising: the PCD insert is arranged on the cutter body;

the cutter body is provided with a plurality of main cutting edges, and main chip grooves are formed among the main cutting edges;

PCD inlaid chips are embedded at the front ends of part of the main cutting edges;

wherein, the rear cutter face without the main cutting edge of the PCD splice piece is provided with a micro blade, the two main cutting edges embedded with the PCD splice piece are provided with PCD splice piece mounting grooves, and the tool nose of the PCD splice piece is positioned on the radial central line of the cutter body;

the micro blades comprise left-handed micro blades and right-handed micro blades, the left-handed micro blades and the right-handed micro blades are alternately and spirally arranged on the periphery of the cutter body, the left-handed micro blades and the right-handed micro blades which are alternately arranged form micro blade ribs, and the micro blade ribs are arranged on the periphery of the cutter body at intervals;

the first right-handed micro blade A comprises a first right-handed micro blade upper end A1 and a first right-handed micro blade lower end A2, the second right-handed micro blade B comprises a second right-handed micro blade upper end B1 and a second right-handed micro blade lower end B2, the first left-handed micro blade C comprises a first left-handed micro blade upper end C1 and a first left-handed micro blade lower end C2, the cutting edge range of the first right-handed micro blade A is from A1 to A2 sections, the cutting edge range of the second right-handed micro blade B is from B1 to B2 sections, the cutting edge range of the first left-handed micro blade C is from C1 to C2 sections, C1 is above A1, and B2 is below A2.

2. The gang cutter with PCD inserts and micro-blades according to claim 1, wherein the cutting edge length ratio of the left-handed micro-blade to the right-handed micro-blade is between 1.25 and 1.6.

3. The gang cutter with a PCD insert and a microedge of claim 1, wherein the cutting edge length ratio of the left-handed microedge to the right-handed microedge is 1.5.

4. The gang cutter with PCD inserts and microedges as claimed in claim 1, wherein the left-handed microedges disposed at intervals coincide with the cutting range of the right-handed microedges.

5. The gang mill with a PCD insert and microcutting edges of claim 4, wherein the cutting range of the right-handed microcutting edge and the left-handed microcutting edge which are spaced apart on the same microcutting edge covers the cutting range of one right-handed microcutting edge on an adjacent microcutting edge.

6. The gang cutter as claimed in claim 1, having a PCD insert and a microedge, wherein the rake and relief angles of the left-handed and right-handed microedges range between 5 ° and 15 °.

7. The gang cutter as claimed in claim 1 or 6, having a PCD insert and a microedge, wherein the rake angle of the left-handed/right-handed microedge is less than the relief angle of the left-handed/right-handed microedge.

8. The gang cutter as claimed in claim 1, wherein the main flutes are circular or V-shaped in vertical cross-section in the direction of extension of the main flutes.

9. The gang mill with a PCD insert and a microedge as claimed in any one of claims 1 to 6 and 8, wherein the PCD insert has a thickness of not less than 2mm.