CN217044769U

CN217044769U - End milling cutter with elliptic arc waveform blades

Info

Publication number: CN217044769U
Application number: CN202220889774.4U
Authority: CN
Inventors: 郑敏利; 赵洪涛; 聂婉莹; 徐世成; 刘月秀
Original assignee: Harbin University of Science and Technology
Current assignee: Harbin University of Science and Technology
Priority date: 2022-04-18
Filing date: 2022-04-18
Publication date: 2022-07-26
Anticipated expiration: 2032-04-18

Abstract

The utility model discloses an oval arc wave form sword end mill, including handle of a knife part and cutting part, handle of a knife part links to each other with the cutting part, the cutting part includes 4 wave form sword and end sword, prolongs every cutting edge after the helix expandes and all comprises one section arc that corresponds by oval major axis and one section circular arc staggered arrangement in proper order, and wherein the arc that oval major axis corresponds is the crest, and the circular arc is the trough. In 4 wave form sword, two adjacent wave form sword are full staggered arrangement, and the center of crest and the center of trough are on same horizontal line, and two relative wave form sword structures are the same. The utility model discloses take oval arc sword tooth and 4 wave form swords are arranged according to full staggered mode, in the life of extension cutter, also have the effect that improves workpiece surface quality and slow down the impact.

Description

End milling cutter with elliptic arc waveform blades

Technical Field

The utility model relates to a cutting tool technical field especially relates to a back wave sword end mill.

Background

The wave-shaped edge end mill is characterized in that a front cutter face or a rear cutter face is processed into a wave-shaped spiral face on the basis of a spiral end mill, and the wave-shaped edge end mill has the characteristics of low cutting resistance, small cutter vibration, high cutting efficiency and the like. If the arrangement mode of helix is adopted to the sword tooth on the wave form sword, two distances at sword tooth centers on two adjacent cutting edges are S/Z promptly, increase in proper order (wherein S is the distance at two sword tooth centers on same wave form sword, and Z is wave form sword and founds the milling cutter number of teeth), although can improve work piece surface quality, nevertheless compare life-span with the wave form sword end mill of full staggered arrangement and hang down (the distance at two sword tooth centers on two adjacent wave form sword is S/2, and the sword tooth on two relative cutting edges is the same for full staggered arrangement promptly). If the edge teeth of the wave-shaped edge end mill are made of sine curves or arcs and the like and the edge teeth are arranged in a full staggered mode, under the same condition, the curvature of the sine curves or the arcs is larger than that of the arcs corresponding to the long axes of the ellipses, the material cut off each circle of the milling cutter is less, and the surface quality of the machined workpiece is poor.

Disclosure of Invention

The utility model discloses take the all crisscross arrangement of 4 wave form sword, this arrangement is favorable to the discharge of smear metal, reduces cutter wearing and tearing to the life of extension cutter. Under the same condition, compared with the wave-shaped edge end mill which adopts the edge teeth made of sine curves or circular arcs and the like and is arranged in a full staggered mode, the arc curvature radius corresponding to the elliptical long axis is large, the elliptical arc is gentle, and more materials are cut off when the mill rotates for one circle, so that the wave-shaped edge end mill has the effects of improving the surface quality of a workpiece and relieving impact.

The end mill with the oval wave-shaped edge comprises a cutter handle part and a cutting part, wherein the cutting part comprises a wave-shaped edge and an end edge, the wave crest of each wave-shaped edge is a section of arc corresponding to the oval long axis, the wave trough of each wave-shaped edge is a section of circular arc, and the wave crest and the circular arc are sequentially arranged in a staggered mode.

The end mill with the elliptic arc waveform cutting edges is a 4-edge mill, the helical angle is 35 degrees, the front angle is 10 degrees, the rear angle is 15 degrees, the tooth space angle is 90 degrees, and the groove opening angle is 70 degrees.

When the elliptic arc wave-shaped edge end mill is not used for processing wave-shaped edge teeth, the section groove curve is composed of a straight line and two circular arcs, the size of the straight line is 3mm, the radiuses of the two circular arcs are respectively 2mm and 15mm, the diameter of the end mill is 20mm, and the core thickness is 10 mm.

The ellipse arc waveform edge end mill has the major axis of the ellipse of 3mm, the minor axis of 2mm, the arc included angle of 140 degrees, and the radius r of the circle tangent to the arc endpoint is 0.25 mm.

In the end milling cutter with the elliptic arc waveform blades and the 4 waveform blades, two opposite waveform blades have the same structure, and two adjacent waveform blades are arranged in a staggered manner.

The utility model has the advantages that: compared with the end milling cutter with the wave-shaped edges arranged in a spiral line mode, the arrangement mode of the edge teeth which are all staggered is beneficial to discharging of cutting scraps, and reduces abrasion of the cutter, so that the service life of the cutter is prolonged. Compared with the wave-shaped edge end milling cutter which adopts the edge teeth made of sine curves or circular arcs and the like and is arranged in a full staggered mode, the wave-shaped edge end milling cutter has the functions of improving the surface quality of a processed workpiece and slowing down the impact.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic view of a radial cross section of the present invention before the wave-shaped blade teeth are machined;

FIG. 3 is a schematic view of the cross-sectional shapes of the blade teeth and the grooves of the wave-shaped blade of the present invention;

fig. 4 is a view showing the arrangement of 4 wave blades according to the present invention.

The numbering in the figures illustrates: a shank part 1, a cutting part 2, a wave-shaped blade 3, a blade tooth 4, a groove 5 and an end blade 6

Detailed Description

The end mill with oval wave shaped edges shown in fig. 1 comprises a shank portion 1 and a cutting portion 2, which comprises wave shaped edges 3 and end edges 6. The wavy edge 3 comprises edge teeth 4 and grooves 5.

In the end mill with the oval wave-shaped edge shown in fig. 2, the groove-shaped curve comprises a straight line and two circular arcs, wherein the circular arc R1 is tangent to the core thickness Wt. The linear dimension L is 3mm, the circular arc R1 and the circular arc R2 are tangent to the linear dimension L at the same time, the radius of the circular arc R1 is 2mm, and the radius of the circular arc R2 is 15 mm. The number of teeth of the milling cutter is 4, the tooth space angle theta is 90 degrees, the core thickness Wt is 10mm, the diameter Dc of the milling cutter processing part is 20mm, and the slot opening angle gamma is 70 degrees. Side edge rake angle gamma of milling cutter ₀ Is 10 degrees, and the side edge back angle alpha of the milling cutter ₀ Is 15 deg..

In the oval arc wave-shaped edge end mill shown in fig. 3, the shape of the blade teeth after the helical line is unfolded is shown, wherein the major axis D of the oval is 3mm, and the minor axis D of the oval is 2 mm. The cross section of the blade tooth 4 is in the shape of a section of arc corresponding to the long axis D of the ellipse, wherein the included angle of the arc

Is 140 deg.. The grooves 5 are connected with the blade teeth 4, and the grooves and the blade teeth are arranged in a staggered mode. The cross-section of the groove 5 is a circular arc with a radius r equal to 0.25mm, which is tangent to the end point of the elliptical arc. The arc curvature radius corresponding to the ellipse long axis is large, the arc is gentle, and the milling cutter rotates for one circle, so that the cut material is more, and the effect of improving the surface quality of the processed workpiece is achieved.

The end mill with the elliptic waveform edges shown in fig. 4 has 4 waveform edges arranged as shown in the figure, wherein the first cutting edge is arranged in the same way as the teeth 4 and the grooves 5 on the third cutting edge, and the second cutting edge is arranged in the same way as the teeth 4 and the grooves 5 on the fourth cutting edge. The cutting edge I and the cutting edge II are staggered with the cutting teeth 4 and the grooves 5, wherein S is 2S. The arrangement mode is convenient for cutting and removing, reduces the abrasion of the cutter, and prolongs the service life of the cutter.

The utility model discloses when extension cutter life, also have the effect that improves part surface quality, slows down the impact.

Claims

1. An elliptical arc waveform edge end mill comprising: the cutting tool comprises a tool shank part and a cutting part, wherein the cutting part comprises a waveform blade and an end blade and is characterized in that the wave crest of each waveform blade is a section of arc corresponding to the long axis of an ellipse, the wave trough is a section of arc, and the wave crest and the arc are sequentially arranged in a staggered mode to form the waveform blade.

2. An elliptical wave edge end mill as set forth in claim 1 wherein: the milling cutter is a 4-edge milling cutter, the helix angle is 35 degrees, the front angle of the side edge is 10 degrees, the rear angle of the side edge is 15 degrees, and the groove opening angle is 70 degrees.

3. An elliptical wave edge end mill as set forth in claim 1 wherein: the diameter of the milling cutter is 20mm, the core thickness is 10mm, the length of the milling cutter is 100mm, and the length of a cutting part is 40 mm.

4. An end mill with oval waveform cutting edges as set forth in claim 1, wherein: the major axis D of the ellipse is 3mm, the minor axis D is 2mm, and the included angle of the arc

The radius r of the arc tangent to the arc end point is 0.25 mm.

5. An end mill with oval waveform cutting edges as set forth in claim 1, wherein: in the 4 wave-shaped blades, two opposite wave-shaped blades have the same structure, and two adjacent wave-shaped blades are arranged in a staggered mode.