CN113649633A

CN113649633A - Corrugated spiral milling cutter for finish machining of aerospace materials

Info

Publication number: CN113649633A
Application number: CN202111132875.3A
Authority: CN
Inventors: 王弢; 朱星晓; 杨路; 王妍
Original assignee: Jiaxing Woerde Diamond Tool Co ltd
Current assignee: Jiaxing Woerde Diamond Tool Co ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2021-11-16

Abstract

The invention provides a corrugated spiral milling cutter for finish machining of aerospace materials, which comprises an edge part for cutting and a handle part for clamping, wherein the edge part comprises peripheral edges and end edges, chip grooves are uniformly distributed among the peripheral edges, chip grooves are uniformly distributed among the end edges, each chip groove is communicated with one chip groove, and a cutting edge of the peripheral edge is in an arc wave shape. The invention has the following beneficial effects: the technical problem that the existing cutter is poor in roughness and machining precision when used for finish machining of aerospace materials is solved through the cutting edge of the circular arc-shaped peripheral edge; the obtained corrugated spiral milling cutter for finish machining of aerospace materials can realize the precision machining of aerospace composite materials, carbon fiber materials, titanium alloys, nickel-based alloys and other materials.

Description

Corrugated spiral milling cutter for finish machining of aerospace materials

Technical Field

The invention relates to the technical field of milling cutters, in particular to a corrugated spiral milling cutter for finish machining of aerospace materials.

Background

Since the 20 th century, with the rapid development of aerospace industry in China, carbon fiber composite materials, carbon/epoxy composite materials, high-temperature titanium alloys, high-temperature nickel-based alloys and other materials are widely used in the aerospace field by virtue of the advantages of the carbon fiber composite materials, the carbon/epoxy composite materials, the high-temperature titanium alloys, the high-temperature nickel-based alloys and other materials, and because of the application of the carbon fiber composite materials, the finish machining difficulty is improved, the phenomena of large cutting resistance of a cutter, easy tool vibration, chip adhesion, serious tool abrasion and the like easily occur, and the carbon fiber composite materials become one of the difficult problems which puzzle people to machine aerospace materials.

When a traditional hard alloy milling cutter is used for processing materials such as titanium alloy, carbon fiber and the like, due to the low heat conductivity of the titanium alloy, heat generated in the processing process of the cutter can be gathered in a cutting area, so that the cutting edge of the cutter is rapidly abraded, cracked and the like; the rapid abrasion of the cutting edge of the cutter can cause the roughness and the processing precision of a workpiece to be poor, and the high processing temperature is easy to generate accumulated scraps, so that the service life of the cutter is shortened.

The high hardness of the carbon fiber material can cause rapid abrasion of the cutter in the machining process, and the problems of workpiece machining layering, tearing, burrs and the like occur, namely the roughness and the machining precision are poor, the material can be scrapped in serious conditions, and resources such as manpower and material resources are greatly wasted.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a corrugated spiral milling cutter for finish machining of aerospace materials, which solves the technical problem that the existing cutter has poor roughness and machining precision when the aerospace materials are finish machined.

According to the embodiment of the invention, the corrugated spiral milling cutter for finish machining of aerospace materials comprises an edge part for cutting and a handle part for clamping, wherein the edge part comprises peripheral edges and end edges, chip grooves are uniformly distributed among the peripheral edges, chip grooves are uniformly distributed among the end edges, each chip groove is communicated with one chip groove, and the cutting edge of the peripheral edge is in a circular arc wave shape.

Furthermore, the cutting part is made of polycrystalline diamond material, the handle part is made of hard alloy, and the cutting part is connected to one end of the handle part.

Furthermore, the design parameter of the thickness of the cutter core of the blade part is D ═ k × D, D is the size of the core thickness, D is the size of the diameter of the actual cutting edge of the blade part, and k is between 0.7 and 0.85.

Further, the spiral angle of the chip grooves is 25-35 degrees.

Further, the cutting edge parameters of the peripheral edge comprise a groove front angle of the cutting edge part, a first rear angle of the peripheral edge and a second rear angle of the peripheral edge, wherein the groove front angle is 8-15 degrees, the first rear angle is 2-15 degrees, and the second rear angle is 20-30 degrees.

Further, the cutting edges of the peripheral edge and the end edge are both arc-shaped.

Furthermore, the front knife face of the end edge and the circular arc of the knife tip are both provided with a smoothing edge.

Further, the wiper blade on the circular arc of the cutter tip is also circular arc-shaped, the arc length of the circular arc-shaped wiper blade is between pi R/10 and 3 pi R/10, and R is the circular arc radius of the wiper blade; the width of the circular arc-shaped smoothing edge is less than or equal to 0.3mm and more than 0 mm.

Further, the length range of the smoothing edge on the front cutter face of the end edge is less than or equal to 1mm and more than 0 mm; the width of the smoothing edge on the front knife face of the end edge is less than or equal to 0.3mm and is more than 0 mm; the smoothing blade on the front blade surface of the end blade is provided with a back angle which is less than or equal to 1 degree and is more than 0 degree.

Further, the number of the chip grooves is set to be 2-6.

The technical principle of the invention is as follows: the cutting edge of the peripheral edge is arc-shaped and wavy, and under the condition of same cutting depth, the actual contact area of the cutting edge of the cutter and the workpiece is larger, so that the machined workpiece has better surface roughness and higher machining precision.

Compared with the prior art, the invention has the following beneficial effects: the technical problem that the existing cutter is poor in roughness and machining precision when used for finish machining of aerospace materials is solved through the cutting edge of the circular arc-shaped peripheral edge; the obtained corrugated spiral milling cutter for finish machining of aerospace materials can realize the precision machining of aerospace composite materials, carbon fiber materials, titanium alloys, nickel-based alloys and other materials.

The spiral angle design of the optimal arc wavy cutting edge matched with the chip removal groove and the groove front angle design of the cutting edge grooving greatly improve the cutting capability of the cutting edge and the chip removal capability of the chip removal groove when the cutter processes a workpiece, effectively avoid the phenomenon of cutter vibration and the phenomenon of chip piling and extrusion, and improve the finish machining precision of materials.

Drawings

Fig. 1 is a front view of a corrugated helical milling cutter according to an embodiment of the present invention.

Fig. 2 is a left side view of a corrugated helical milling cutter according to an embodiment of the present invention.

Fig. 3 is a partially enlarged view of a portion a of fig. 2.

In the above drawings: 100. a blade part; 110. a peripheral edge; 111. the shape of a circular arc is wave-shaped; 112. a first relief angle; 113. a second relief angle; 120. an end blade; 121. smoothing the edge; 130. a chip groove; 140. a chip pocket; 200. a handle portion.

Detailed Description

The technical solution of the present invention is further explained with reference to the drawings and the embodiments.

As shown in fig. 1, the corrugated spiral milling cutter for finish machining of aerospace material includes a cutting portion 100 for cutting and a handle portion 200 for clamping, the specific cutting portion 100 is made of polycrystalline diamond, the handle portion 200 is made of hard alloy, the cutting portion 100 is integrally connected to one end of the handle portion 200 by high-frequency induction welding, the cutting portion 100 is made of polycrystalline diamond, and compared with the hard alloy, the corrugated spiral milling cutter has the characteristics of higher hardness, better wear resistance and higher durability, and has the advantages that when high-hardness materials such as similar carbon fiber materials are machined, rapid wear of the cutter in the machining process caused by high hardness of the workpiece can be avoided, and further the problems of workpiece machining layering, tearing, burrs and the like can be solved.

As shown in fig. 1-2, the cutting edge portion 100 includes a peripheral edge 110 and an end edge 120, flutes 130 are uniformly distributed between the peripheral edge 110, flutes 140 are uniformly distributed between the end edges 120, each flute 140 communicates with one flute 130, the cutting edge of the peripheral edge 110 is designed to be an arc wave 111, and the cutting edge of the arc wave 111 has a larger contact area with the workpiece and an increased contact surface with the cutting edge compared with the conventional linear or arc cutting edge, so that the heat dissipation area is also increased, the heat dissipation effect is good, the actual contact area is also increased during cutting, and the surface finish of the processed workpiece can be higher.

As shown in fig. 1, the spiral angle of the chip groove 130 is 25 to 35 degrees, when materials such as carbon fiber composite materials, carbon/epoxy composite materials, high-temperature titanium alloys and high-temperature nickel-based alloys are subjected to fine machining, each arc wave cutting edge has an axial and radial rake angle machining angle, the cutting capability of the cutting edge and the chip removal capability of the chip groove 130 can be greatly improved when a tool is used for machining a workpiece, the cutter vibration phenomenon and the chip packing phenomenon are effectively avoided, the fine machining precision of the materials is improved, and the specific spiral angle of the chip groove 130 is optimal when 30 degrees.

As shown in fig. 1 and 3, the cutting edge parameters of the peripheral edge 110 are composed of a groove rake angle α of the cutting edge 100, a first relief angle 112 of the peripheral edge 110 and a second relief angle 113 of the peripheral edge 110, the groove rake angle α is 8-15 °, the first relief angle 112 is 2-15 °, the second relief angle 113 is 20-30 °, and the groove rake angle α, the first relief angle 112 and the second relief angle 113 cooperate with the flute discharge groove 130 to increase the cutting capability of the edge.

As shown in fig. 2, the design parameter of the core thickness of the blade 100 is D ═ k × D, D is the core thickness, D is the diameter of the actual cutting edge of the blade 100, and k is between 0.7 and 0.85, so that the core thickness is larger, the depth design dimension of the chip groove 130 is shallower, and the rigidity and the anti-seismic performance of the milling cutter are improved, and the precision of finish machining is ensured.

As shown in fig. 1-2, the tips of the peripheral blade 110 and the end blade 120 are both designed to be circular arc R1, i.e. a spherical surface is formed, so that the stability of the tip is improved, the machining quality of the material is guaranteed again while the machining vibration of the tool is reduced, and meanwhile, because the tips of the peripheral blade 110 and the end blade 120 are both designed to be circular arc R1, the milling cutter can flexibly perform plunge milling and side milling, different tools do not need to be replaced in the machining process, so that the machining process is smoother, time and labor are saved, and the effect of improving the machining efficiency is achieved.

As shown in fig. 2-3, the rake face of the end cutting edge 120 and the nose arc R1 are both provided with the wiper edge 121, specifically, the wiper edge 121 on the nose arc R1 is also arc-shaped, the arc length of the arc-shaped wiper edge 121 is between pi R/10 and 3 pi R/10, and R is the arc-shaped radius of the wiper edge 121; the width of the arc-shaped smoothing blade 121 is less than or equal to 0.3mm and more than 0 mm; the length range of the smoothing edge 121 on the front tool face of the end edge 120 is less than or equal to 1mm and more than 0 mm; the width of the smoothing edge 121 on the front tool face of the end edge 120 is less than or equal to 0.3mm and is more than 0 mm; the burnishing edge 121 on the front tool face of the end blade 120 is provided with a back angle beta which is not more than 1 degree and is more than 0 degree, the burnishing edge 121 on the front tool face of the end blade 120 and the burnishing edge 121 on the arc shape of the tool nose are adopted, when the milling cutter carries out end face finish machining on a workpiece, the workpiece is subjected to primary machining through the main cutting edge, and then the two burnishing edges 121 respectively carry out secondary machining on the main cutting edge of the end blade 120 and the position of the tool nose, so that the roughness of the machined surface of the workpiece is greatly reduced.

The number of the chip grooves 130 is set to be between 2 and 6 according to the type, shape and size of the materials encountered by the milling cutter in actual processing.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims

1. A corrugated spiral milling cutter for finishing aerospace materials, comprising a blade portion for cutting and a shank portion for clamping, characterized in that: the cutting edge part comprises a circumferential edge and an end edge, chip grooves are evenly distributed between the circumferential edge and the end edge, chip grooves are evenly distributed between the end edge, every chip groove is communicated with one chip groove, and the cutting edge of the circumferential edge is designed into a circular arc wave shape.

2. A corrugated helical milling cutter for finishing aerospace materials as claimed in claim 1, wherein: the cutting part is made of polycrystalline diamond material, the handle is made of hard alloy, and the cutting part is connected to one end of the handle.

3. A corrugated helical milling cutter for finishing aerospace materials as claimed in claim 1, wherein: the design parameter of the thickness of the cutter core of the edge part is D ═ k × D, the D is the size of the thickness of the core, the D is the size of the diameter of the actual cutting edge of the edge part, and the k is between 0.7 and 0.85.

4. A corrugated helical milling cutter for finishing aerospace materials as claimed in claim 1, wherein: the spiral angle of the chip groove is 25-35 degrees.

5. A corrugated helical milling cutter for finishing aerospace materials as claimed in claim 1 or 4, wherein: the cutting edge parameters of the peripheral edge consist of a groove front angle of the cutting edge part, a first rear angle of the peripheral edge and a second rear angle of the peripheral edge, wherein the groove front angle is 8-15 degrees, the first rear angle is 2-15 degrees, and the second rear angle is 20-30 degrees.

6. A corrugated helical milling cutter for finishing aerospace materials as claimed in claim 1, wherein: the knife edges of the peripheral edge and the end edge are both arc-shaped.

7. A corrugated helical milling cutter for finishing aerospace materials as claimed in claim 6, wherein: and the front cutter face of the end cutter and the circular arc of the cutter tip are both provided with a smoothing cutter.

8. A corrugated helical milling cutter for finishing aerospace materials as claimed in claim 7, wherein: the arc length of the arc-shaped burnishing edge is between pi R/10 and 3 pi R/10, and R is the arc-shaped radius of the burnishing edge; the width of the circular arc-shaped smoothing edge is less than or equal to 0.3mm and more than 0 mm.

9. A corrugated helical milling cutter for finishing aerospace materials as claimed in claim 7, wherein: the length range of the smoothing edge on the front cutter face of the end edge is less than or equal to 1mm and more than 0 mm; the width of the smoothing edge on the front knife face of the end edge is less than or equal to 0.3mm and is more than 0 mm; the smoothing blade on the front blade surface of the end blade is provided with a back angle which is less than or equal to 1 degree and is more than 0 degree.

10. A corrugated helical milling cutter for finishing aerospace materials as claimed in claim 1, wherein: the number of the chip grooves is set to be 2-6.