CN108746794A - A kind of screw-on cutter - Google Patents

Abstract

The invention discloses a helical milling cutter, which comprises a shank and a knife part arranged at one end of the shank, the knife part is provided with a right-handed blade, and the knife part is also provided with a For the left-handed blade for milling, the directions of the left-handed blade and the right-handed blade are aligned in the same direction. Among them, the axial component force of the main cutting force of the left-handed blade in the axial direction is opposite to that of the main cutting force of the right-handed blade in the axial direction, that is, the internal axial forces cancel each other out, and because the setting Two blades, so the overall cutting speed can be greatly improved, thereby improving work efficiency. Due to the presence of left-handed and right-handed blades, burrs generated by each other can be effectively removed. To sum up, the helical milling cutter can effectively solve the problem of limited milling speed and burrs of the helical milling cutter.

Description

A spiral milling cutter

technical field

The invention relates to the technical field of cutting tools, and more specifically, relates to a helical milling cutter.

Background technique

With the widespread use of carbon fiber reinforced composite materials (CFRP) and the urgent need for the development of Industry 4.0, high-speed cutting technology has emerged as the times require. In the modern high-speed cutting process, the traditional milling cutter is difficult to meet the processing requirements. It is necessary to develop a new type of cutting tool for CFRP high-speed cutting to meet the production efficiency, processing quality and precision requirements.

There are many problems in the test process of the existing common milling cutter, such as a large number of irregular burrs on the milling surface, short tool life, which leads to increased production costs, low production efficiency and other technical problems that need to be solved urgently.

To sum up, how to effectively solve the problems of limited milling speed and burrs of helical milling cutters is an urgent problem for those skilled in the art.

Contents of the invention

In view of this, the object of the present invention is to provide a helical milling cutter, which can effectively solve the problems of limited milling speed and burr generation of the helical milling cutter.

In order to achieve the above-mentioned first object, the present invention provides the following technical solutions:

A helical milling cutter, comprising a shank and a knife portion arranged at one end of the shank, the knife portion is provided with a right-handed blade, and the knife portion is also provided with a tool for milling together with the right-handed blade For the left-handed blade, the directions of the left-handed blade and the right-handed blade are aligned in the same direction.

Through the above technical scheme, it can be seen that the axial component force of the main cutting force of the left-handed blade in the axial direction is opposite to the axial component force of the main cutting force of the right-handed blade in the axial direction, that is, The internal forces cancel each other out, thus effectively avoiding the problem of excessive force on the tool part and easy damage during fast cutting. In addition, since there are left-handed blades and right-handed blades, and the two are opposite in the axial direction, the burrs generated by the right-handed blades are removed by the left-handed blades, and the burrs generated by the left-handed blades are removed by the right-handed blades. Setting two cutting edges at the same time can greatly increase the cutting speed, thereby improving work efficiency. To sum up, the helical milling cutter can effectively solve the problem of limited milling speed and burrs of the helical milling cutter.

Preferably, the left-handed blade and the right-handed blade are overlapped in the axial direction.

Preferably, the knife portion is provided with a right-handed first chip removal flute, and the left edge of the opening of the first chip removal flute is the right-handed cutting edge; two adjacent first chip removal flutes The left-handed blades are arranged between the grooves.

Preferably, the part of the knife portion located between two adjacent first chip flutes is provided with a left-handed second chip flute, and the left edge of the notch of the second chip flute is the Describe the left-handed blade.

Preferably, the pitch of the left-handed blade is smaller than that of the right-handed blade.

Preferably, the right-handed angle of the right-handed blade is between 5° and 15°, the left-handed angle of the left-handed blade is between 20° and 45°, and the number of edges of the right-handed blade and the left-handed blade are equal. Between 6 and 10 blades, the chip spacing is between 3mm and 8mm.

Preferably, a diamond coating is provided on both the right-handed blade and the left-handed blade.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the structural representation of the helical milling cutter that the embodiment of the present invention provides;

Fig. 2 is a force analysis diagram of the left-handed blade and the right-handed blade during the milling process of the helical milling cutter provided in this embodiment.

The markings in the attached drawings are as follows:

Shank 1, cutter 2, right-handed blade 3, left-handed blade 4, first chip flute 5, second chip flute 6, milling workpiece 7.

Detailed ways

The embodiment of the invention discloses a helical milling cutter to effectively solve the problems of limited milling speed and burr generation of the helical milling cutter.

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of a helical milling cutter provided by an embodiment of the present invention.

In a specific embodiment, this embodiment provides a helical milling cutter, specifically, the helical milling cutter includes a shank 1 and a cutter 2 , wherein the cutter 2 is arranged at one end of the shank 1 . For the convenience of description, the handle 1 is arranged above the knife part 2 , that is, the upper part is the handle 1 and the lower part is the knife part 2 . The shank 1 is connected to the power base, and the cutter 2 is provided with a milling blade for milling a target object.

In this embodiment, the knife portion 2 is provided with a right-handed blade 3 and a left-handed blade 4, wherein the right-handed blade 3 means that the extension direction of the helix is oblique to the upper right direction, and the left-handed blade 4 refers to , the extension direction of the spiral is oblique to the upper left direction. For the extension directions of left-handed and right-handed, the definition method can refer to the specific determination method in the prior art.

The above-mentioned left-handed blade 4 and right-handed blade 3 are both arranged on the knife portion 2, and the left-handed blade 4 and the right-handed blade 3 should be able to mill together in the milling area, so that when the right-handed blade 3 is located in the milling area for milling, correspondingly, The left-handed cutting edge 4 should also be milled in the milling zone. In order to better ensure common milling, it is preferred that the left-handed blade 4 and the right-handed blade 3 are overlapped in the axial direction to ensure that the left-handed blade 4 and the right-handed blade 3 will perform milling work at the same time, which can better reduce internal stress . Wherein the overlap is preferably completely overlapped.

In addition, the circumferential tangential directions of the left-handed blade 4 and the right-handed blade 3 are in the same direction, that is, the radial directions are in the same direction. Specifically, when they are all facing left, the helical milling cutter rotates clockwise, and the left-handed blade 4 and the right-handed blade 3 are all in the milling state; as when all facing rightward, the helical milling cutter rotates counterclockwise, and now the left-handed blade 4 and the right-handed blade 3 are in the milling state.

For better analysis, the following examples are shown, as shown in FIG. 2 . FIG. 2 is a force analysis diagram of the left-handed blade 4 and the right-handed blade 3 during the milling process of the helical milling cutter provided in this embodiment. During the cutting process, the tool rotates clockwise, the feeding direction is perpendicular to the paper surface, and the left-handed blade 4 and the right-handed blade 3 are both set to the left. The left-handed blade 4 will generate a main cutting force F _lc perpendicular to the cutting edge, which can be decomposed into a horizontal rightward radial force F _lx and a vertical downward axial force F _ly ; similarly, the right-handed blade 3 A main cutting force F _rc perpendicular to the cutting edge will be generated, which can be decomposed into a horizontal rightward radial force F _rx and a vertical upward axial force F _ry . Through the above analysis, it can be seen that the directions of the axial force F _ly and the axial force F _ry are opposite.

Through the above analysis, it can be seen that the axial component of the main cutting force of the left-handed blade 4 in the axial direction is opposite to the axial component of the main cutting force of the right-handed blade 3 in the axial direction, that is, the internal The active forces cancel each other out, thereby effectively avoiding the problem that the cutter portion 2 is easily damaged due to excessive force during rapid cutting. In addition, due to the existence of the left-handed blade 4 and the right-handed blade 3, and the two are opposite in the axial direction, for the burrs generated by the right-handed blade 3, the left-handed blade 4 removes them, and for the burrs generated by the left-handed blade 4, the right-handed blade 3 for removal. As shown in the accompanying drawings, the left-handed blade 4 solves the problem of residual burrs on the upper surface of the milled workpiece; solves the problem of residual burrs on the lower surface of the milled workpiece. Setting two cutting edges at the same time can greatly increase the cutting speed, thereby improving work efficiency. To sum up, the helical milling cutter can effectively solve the problem of limited milling speed and burrs of the helical milling cutter.

Further, in order to better and more conveniently set the right-handed blade 3 and the left-handed blade 4, first of all, here, the first chip flute 5 with a right-handed distribution is preferably provided on the knife portion 2, for the left-handed blade Said, wherein the left edge of the notch of the first flute 5 is the above-mentioned right-handed cutting edge 3 . This cutting method is simple and convenient. It should be noted that the material of the knife portion 2 should be a material suitable for forming a knife edge.

For the forming of the above-mentioned left-handed blade 4, correspondingly, a left-handed second chip flute 6 is provided on the portion of the knife portion 2 between two adjacent first chip flutes 5, and the second chip flute 6 therein The left edge of the groove 6 notch is a left-handed blade 4. Through the arrangement of the left-handed blade 4 and the right-handed blade 3 above, the knife can be made quickly and conveniently. At the same time, due to the existence of the first chip removal groove 5 and the second chip removal groove 6, the chip removal can be completed quickly and the cutting effect can be effectively guaranteed.

Further, considering that the part where the left-handed blade 4 is allowed to be set is relatively narrow, in order to ensure the service life of the left-handed blade 4, the pitch of the left-handed blade 4 is preferably smaller than that of the right-handed blade 3, so as to ensure that the force of the left-handed blade 4 is smaller than that of the right-handed blade 3 . Specifically, it is preferred that the right-handed angle of the right-handed blade is between 5° and 15°, including 5° and 15°, and the left-handed angle of the left-handed blade is between 20° and 45°, including 20° and 45°, And it is preferable that the number of edges of the right-handed blade and the left-handed blade is between 6 edges and 10 edges, including 6 edges and 10 edges, and the chip division spacing of the right-handed blade and the left-handed blade is between 3 mm and 8 mm, including 3mm and 8mm.

For the knife part 2, especially based on the above-mentioned forming method, the knife part 2 is generally one piece, and the forming material is generally a material suitable for forming a blade. Specifically, the general knife part 2 is a carbon fiber material knife part, but because the thermal conductivity of the carbon fiber material itself is relatively small, this causes a large amount of cutting heat to be generated during high-speed cutting, which is difficult to quickly remove, and the hardness of the carbon fiber material Larger, so the service life of the tool is greatly shortened. Based on this, it is preferable that the blades of the right-handed blade 3 and the left-handed blade 4 adopt diamond coating, so as to improve the hardness and thermal conductivity of the tool through the diamond coating, thereby prolonging the life of the tool.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (7)

1. a kind of screw-on cutter, including shank and it is arranged and is provided with dextrorotation knife in the knife portion of described shank one end, the knife portion Sword, which is characterized in that it is additionally provided in the knife portion for the left-handed blade with the common milling of dextrorotation blade, it is described left-handed Blade tangentially divides direction direction consistent with the circumference of the direction of the dextrorotation blade.

2. screw-on cutter according to claim 1, which is characterized in that the left-handed blade and the dextrorotation blade are in axial direction It is overlapped on direction.

3. screw-on cutter according to claim 2, which is characterized in that the knife portion offers the first chip removal of dextrorotation distribution The left side opening's edge of slot, the first chip space notch is the dextrorotation blade；It is arranged between two neighboring first chip space There is the left-handed blade.

4. screw-on cutter according to claim 3, which is characterized in that the knife portion is located at two neighboring first chip removal Part between slot offers the second chip space of left-handed distribution, and the left side opening's edge of the second chip space notch is described left-handed Blade.

5. screw-on cutter according to claim 4, which is characterized in that the left-handed blade screw pitch is less than the dextrorotation knife Sword.

6. according to claim 1-5 any one of them screw-on cutters, which is characterized in that the dextrorotation blade dextrorotation angle is at 5 ° To between 15 °, the left-handed left-handed angle of blade is between 20 ° to 45 °, and the sword of the dextrorotation blade and the left-handed blade Number 6 swords between 10 swords, point bits spacing between 3 millimeters to 8 millimeters.

7. screw-on cutter according to claim 6, which is characterized in that be all provided on the dextrorotation blade and the left-handed blade Set diamond coatings.