CN211489819U - Sine wave spiral end mill - Google Patents

Abstract

The utility model discloses a sine wave spiral end mill, including coaxial coupling's handle of a knife and cutter arbor, the circumference interval arrangement of cutter arbor has a plurality of sine wave cutting edges, the sine wave cutting edge is by the circumference side of cutter arbor is along doing the sine wave and shaking radially, and the sine wave cutting edge extends to the cutter arbor one end spiral that keeps away from the handle of a knife, and the sine wave cutting edge forms spiral terminal point at the tip of cutter arbor; a spiral chip groove is formed in the front of the sine wave cutting edge, and one or more rear cutter faces are arranged behind the sine wave cutting edge; the spiral chip groove and the rear tool face extend towards the end, far away from the tool shank, of the tool bar in a spiral mode, and the spiral end point is located at the end portion of the tool bar and forms a protruding tip. The utility model discloses make the axial force of cutter offset each other, alleviateed end milling cutter's vibration greatly, and can realize quick chip removal.

Description

Sine wave spiral end mill

Technical Field

The utility model relates to a mechanical milling process technical field especially relates to a sine wave spiral end mill.

Background

In a common high-speed steel end mill, a cutting edge is often a straight edge or a spiral edge, wherein the spiral edge only rotates the straight edge along a spiral line, each point of the cutter in each feeding process can bear a large cutting force in the rotating process of the cutter, the capacity of a chip discharge groove is limited, the cutting efficiency of the cutter is low, chips are difficult to curl and discharge, and vibration is often generated during milling.

SUMMERY OF THE UTILITY MODEL

In order to solve the high-speed steel end mill cutting edge among the prior art straighter, mill the volume of the unchangeable, chip groove of in-process smear metal power limited, cause cutter cutting efficiency to hang down, the smear metal is curled and is discharged more difficultly, still often produces the technical problem of vibration during milling, the utility model provides a sine wave spiral end mill solves above-mentioned problem.

The utility model provides a technical scheme that its technical problem adopted is: a sine wave spiral end mill comprises a cutter handle and a cutter bar which are coaxially connected, wherein a plurality of sine wave cutting edges are arranged at intervals in the circumferential direction of the cutter bar, the sine wave cutting edges perform sine wave oscillation along the radial direction from the circumferential side surface of the cutter bar, the sine wave cutting edges spirally extend towards one end of the cutter bar far away from the cutter handle, and the sine wave cutting edges form a spiral terminal point at the end part of the cutter bar; a spiral chip groove is formed in the front of the sine wave cutting edge, and one or more rear cutter faces are arranged behind the sine wave cutting edge; the spiral chip groove and the rear tool face extend towards the end, far away from the tool shank, of the tool bar in a spiral mode, and the spiral end point is located at the end portion of the tool bar and forms a protruding tip.

Preferably, the sine wave blades are provided with four.

Preferably, the four spiral chip grooves form concentric circular arcs with the same diameter at the end of the cutter bar, and the end of the cutter bar is recessed gradually from the concentric circular arcs to the center of the cutter bar in the direction away from the end of the cutter bar.

Preferably, the spiral directions of the spiral chip grooves and the sine wave cutting edges are both right-handed.

Preferably, the spiral angle of the spiral chip groove is 20-25 degrees.

Preferably, the flank comprises a first flank and a second flank which are sequentially arranged backward from the sinusoidal blade; the back knife angle of the first back knife surface is 10-12 degrees, and the back knife angle of the second back knife surface is 20-22 degrees.

Preferably, the diameter of the tool shank is gradually reduced from one end close to the tool shank to one end far away from the tool shank.

The utility model has the advantages that:

(1) the utility model provides a cutting edge adopts the sine wave cutting edge, and the sine wave cutting edge makes the axial force offset mutually, has alleviateed end milling cutter's vibration greatly.

(2) The utility model discloses the place ahead of well sine wave cutting edge is spiral chip groove promptly, and the rear is equipped with the back knife face, because the sine wave cutting edge vibrates along radial undulation, consequently spiral chip groove capacity and the back knife face angle of every point on the sine wave cutting edge all inequality, cut into gradually moreover, this produced period milling power of every cutting edge of just having eliminated general end mill. Therefore, by adopting the milling cutter for machining, even if the milling allowance is large, the milling is stable, and meanwhile, the rapid chip removal can be realized.

(3) The utility model discloses in the spiral terminal point is in the tip of cutter arbor forms protruding most advanced, the tip center of cutter arbor is sunken to inside to increase cutter and atmospheric area of contact, the metal fillings are in spiral terminal point department can directly discharge, reduces the contact time with the cutter arbor, avoids the overheated life that influences of cutter arbor.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a front view of an embodiment of a sine wave helical end mill according to the present invention;

FIG. 2 is a top view of an embodiment of the sine wave helical end mill of the present invention (the direction indicated by the arrow is the direction of tool rotation);

fig. 3 is a schematic view of the direction a-a in fig. 1.

In the figure, the tool comprises a tool shank 1, a tool shank 2, a tool bar 3, a sine wave cutting edge 4, a spiral terminal point 5, a spiral chip groove 6, a first rear tool face 7, a second rear tool face 8, a concentric circular arc 9 and a concave part.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like 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 only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The utility model discloses in the place ahead is the place ahead that is located cutter direction of rotation, and the rear is the rear that is located cutter direction of rotation.

The utility model discloses a concrete embodiment, as shown in fig. 1-3, a sine wave spiral end mill, including coaxial coupling's handle of a knife 1 and cutter arbor 2, the circumference interval arrangement of cutter arbor 2 has a plurality of sine wave cutting edges 3, and sine wave cutting edge 3 makes the sine wave vibration by the circumference side of cutter arbor 2 along radial, and sine wave cutting edge 3 extends to the cutter arbor 2 one end spiral of keeping away from handle of a knife 1, and sine wave cutting edge 3 forms spiral terminal point 4 at the tip of cutter arbor 2; a spiral chip groove 5 is formed in front of the sine wave cutting edge 3, and one or more rear cutter faces are arranged behind the sine wave cutting edge 3; the spiral chip grooves 5 and the rear tool face extend towards one end of the cutter rod 2 far away from the cutter handle 1 in a spiral mode respectively, and the spiral terminal points 4 form protruding tips at the end portion of the cutter rod 2.

Sine wave cutting edge 3 is provided with four in this embodiment, the spiral terminal point 4 of sine wave cutting edge 3 is at the tip protrusion cutter arbor 2 terminal surfaces of cutter arbor 2, thereby make the cutter finish the cutting at the tip of cutter arbor 2 and directly discharge the metal fillings, reduce the contact of metal fillings and cutter, because sine wave cutting edge 3 undulates and vibrates, the cutting force of each point on the cutting edge is inequality during the cutting, the produced cycle milling force of every cutting edge of general end mill has been eliminated, and the axial force offsets each other, the vibration of end mill has been alleviateed greatly, and the undulation of cutting edge can play the effect that increases spiral chip groove 5 capacity, increase the chip removal volume. The sine wave blade 3 and the spiral chip groove 5 have the same spiral direction, and can be right-handed or left-handed, and a right-handed spiral is selected in the embodiment.

The four spiral chip grooves 5 form concentric circular arcs 8 with the same diameter at the end part of the cutter rod 2, and the end part of the cutter rod 2 is gradually sunken from the concentric circular arcs 8 to the center of the cutter rod 2 towards the direction far away from the end part of the cutter rod 2. At the moment, the thickness and the size of each chip removal groove are equal, the cutter bar 2 is heated uniformly, and the cutter bar 2 is prevented from being heated unevenly to generate thermal stress deformation. The central depressed part of cutter arbor 2 can increase the area of contact of cutter arbor 2 and air for the radiating rate, sunken degree of depth is decided according to specific cutter intensity, if the intensity requirement of cutter is higher, then sunken degree of depth is difficult too big, avoids cutter arbor 2 rupture when cutter arbor 2 cavity causes the cutting.

The spiral angle of the spiral chip groove 5 is preferably 20-25 degrees. The rear knife face comprises a first rear knife face 6 and a second rear knife face 7 which are sequentially arranged backwards by the sine wave knife edge 3; the relief angle of the first relief surface 6 is preferably 10 ° to 12 °, and the relief angle of the second relief surface 7 is preferably 20 ° to 22 °.

The utility model discloses a concrete embodiment, the diameter of handle of a knife 1 reduces by the one end that is close to cutter arbor 2 to the one end of keeping away from cutter arbor 2 gradually, the machine clamping handle of a knife 1 position of being convenient for.

The ordinary end mill with the utility model discloses make contrast test, the test condition is the same, and milling cutter diameter is 40mm promptly, mills the width and is 50mm, mills the degree of depth and is 15mm, and every tooth feed volume is 0.1 ~ 0.25 mm/z. The test result shows that: the feed resistance of the utility model is reduced by 16%; the unit milling power of the present invention is smaller than that of a normal end mill (about 1/4 of a normal end mill) when cutting chips of the same volume. The utility model is used for milling the steel plate workpiece of gas cutting; the effect is more obvious; the productivity is more than 5 times higher than that of the common end milling cutter.

In this specification, the schematic representations of the terms are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (7)

1. The sine wave spiral end mill is characterized in that: the sine wave knife edge is spirally extended to one end of the knife bar far away from the knife handle, and the sine wave knife edge forms a spiral terminal point at the end part of the knife bar;

a spiral chip groove is formed in the front of the sine wave cutting edge, and one or more rear cutter faces are arranged behind the sine wave cutting edge; the spiral chip groove and the rear tool face extend towards the end, far away from the tool shank, of the tool bar in a spiral mode, and the spiral end point is located at the end portion of the tool bar and forms a protruding tip.

2. The sine wave helical end mill according to claim 1, wherein: the sine wave cutting edges are four.

3. The sine wave helical end mill according to claim 2, wherein: the four spiral chip grooves are formed in the end portion of the cutter rod to form concentric circular arcs with the same diameter, and the end portion of the cutter rod is recessed gradually from the concentric circular arcs to the center of the cutter rod towards the direction far away from the end portion of the cutter rod.

4. The sine wave helical end mill according to claim 1, wherein: the spiral directions of the spiral chip grooves and the sine wave cutting edges are both right-handed.

5. The sine wave helical end mill according to claim 4, wherein: the spiral angle of the spiral chip groove is 20-25 degrees.

6. The sine wave helical end mill according to claim 1, wherein: the rear cutter surface comprises a first rear cutter surface and a second rear cutter surface which are sequentially arranged backwards by the sine wave cutter edge; the back knife angle of the first back knife surface is 10-12 degrees, and the back knife angle of the second back knife surface is 20-22 degrees.

7. The sine wave helical end mill according to claim 1, wherein: the diameter of the knife handle is gradually reduced from one end close to the knife rod to one end far away from the knife rod.

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