CN214212360U - End milling cutter with curved surface on rear cutter face of chamfering edge - Google Patents
End milling cutter with curved surface on rear cutter face of chamfering edge Download PDFInfo
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- CN214212360U CN214212360U CN202022455935.2U CN202022455935U CN214212360U CN 214212360 U CN214212360 U CN 214212360U CN 202022455935 U CN202022455935 U CN 202022455935U CN 214212360 U CN214212360 U CN 214212360U
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Abstract
The utility model discloses an end mill with a curved face as the rear cutter face of a chamfer edge, which comprises a cylindrical rod-shaped body; one end of the cylindrical rod-shaped body is provided with a cutting part, and the other end of the cylindrical rod-shaped body is a handle part; the cutting part comprises a peripheral edge positioned on the peripheral surface of the cylindrical rod-shaped body and a bottom edge positioned on one end surface of the cylindrical rod-shaped body; a chamfer edge is arranged at the joint of the peripheral edge and the bottom edge; the chamfering blade is provided with a chamfering blade front blade surface and a chamfering blade rear blade surface; the chamfer edge flank surface is a curved surface shape. The utility model discloses can effectively strengthen the intensity and the wearability at chamfer sword position, make the cutter under the rough machining condition, possess good anti property, the wearability of collapsing to improve cutter life.
Description
Technical Field
The utility model relates to a cutter manufacturing and designing technical field especially relates to a knife face is end milling cutter of curved surface behind chamfer sword.
Background
The end mill is a common cutting tool, and is the most used milling tool on a numerical control machine tool, and the cylindrical surface and the end surface of the end mill are provided with cutting tools which can simultaneously cut or independently cut. The milling cutter is mainly used for plane milling, groove milling, step surface milling and profiling milling. With the continuous innovation of modern machining, higher requirements are placed on the machining efficiency and the service life of the cutter. In order to meet the high demand of machining on production efficiency, a rounded or chamfered edge is generally added to the joint of the peripheral edge and the bottom edge of the roughing cutter, so that the strength of the cutting edge is improved, the breakage resistance of the cutter is enhanced, and higher machining efficiency and longer service life of the cutter can be realized. The conventional end mill has disadvantages that the chamfer edge flank surface is generally planar, and therefore, the strength is low, the edge is easily broken, and the chamfer edge flank surface is easily interfered with the surface of a workpiece to be machined.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a knife face is end milling cutter of curved surface behind the chamfer sword, through institutional advancement, can effectively strengthen the intensity and the wearability at chamfer sword position, make the cutter under the rough machining condition, possess good anti collapse nature, wearability to improve cutter life.
The utility model provides a technical scheme that its technical problem adopted is: an end mill with a back cutter face of a chamfer edge being a curved surface comprises a cylindrical rod-shaped body; one end of the cylindrical rod-shaped body is provided with a cutting part, and the other end of the cylindrical rod-shaped body is a handle part; the cutting part comprises a peripheral edge positioned on the peripheral surface of the cylindrical rod-shaped body and a bottom edge positioned on one end surface of the cylindrical rod-shaped body; a chamfer edge is arranged at the joint of the peripheral edge and the bottom edge; the chamfering blade is provided with a chamfering blade front blade surface and a chamfering blade rear blade surface; the chamfer edge flank surface is a curved surface shape.
In the chamfer edge flank, the greater the distance from the chamfer edge, the greater the chamfer edge relief angle, the greater the distance from the chamfer edge flank to the surface to be machined, and the greater the increase in the distance from the chamfer edge flank to the surface to be machined, the greater the increase in the distance from the chamfer edge flank to the surface to be machined.
The front tool face of the chamfer edge is a curved surface or a plane.
The curved surface of the back knife face of the chamfering edge is in a circular arc shape, a spline curve shape or a parabola shape.
The value range of the back angle beta of the chamfering edge is 7-15 degrees.
The value range of the front angle gamma of the chamfering edge is 0-8 degrees.
The width of the chamfering edge is less than or equal to half of the diameter of the cylindrical rod-shaped body.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model adopts the chamfer edge arranged at the joint of the peripheral edge and the bottom edge; the chamfering blade is provided with a chamfering blade front blade surface and a chamfering blade rear blade surface; the chamfer edge flank surface is curved, and the distance from the chamfer edge flank surface to the chamfer edge is larger, the chamfer edge relief angle is larger, the distance from the chamfer edge flank surface to the surface to be machined is longer, the increasing range of the distance from the chamfer edge flank surface to the surface to be machined is larger than the increasing range of the distance from the plane-type chamfer edge flank surface to the surface to be machined. The structure of the utility model enables the clearance between the rear cutter face of the chamfering edge and the processed surface to be gradually increased, thereby avoiding interference, reducing friction force and improving the wear resistance of the cutter; meanwhile, enough support can be provided, the rigidity of the cutter is guaranteed, the strength and the wear resistance of the chamfer edge part can be effectively enhanced, and the cutter has good collapse resistance and wear resistance under the rough machining condition, so that the service life of the cutter is prolonged.
The present invention will be described in further detail with reference to the accompanying drawings and examples; however, the end mill of the present invention in which the rear face of the chamfer edge is a curved face is not limited to the embodiment.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present invention;
fig. 2 is a partial schematic view of a cutting portion of an embodiment of the invention;
FIG. 3 is a sectional view taken along line E-E in FIG. 2;
fig. 4 is a partial configuration diagram of an embodiment of the present invention.
In the figure, 1, a knife handle; 2. a peripheral edge; 3. a bottom edge; 4. a chamfering blade; 41. a chamfer edge rake face; 42. a chamfer edge relief face; gamma, the rake angle of the chamfered edge; beta, the relief angle of the chamfered edge; a. a point on the flank of the chamfer edge; o, the circle center of the cutter; c. a chamfer blade tip; x, a to the c point of the chamfer edge and the distance of the circle center o; d. a point a to the c point of the chamfer edge and a vertical foot of a line of the circle center o; y, a, distance between point c and tangent line of circle of rotation around center of the tool; b. point a to the tangent foot.
Detailed Description
Examples
Referring to fig. 1 to 4, the end mill of the present invention, in which the rear face of the chamfer edge is a curved surface, includes a cylindrical rod-shaped body; one end of the cylindrical rod-shaped body is provided with a cutting part, and the other end of the cylindrical rod-shaped body is provided with a handle part 1; the cutting part comprises a peripheral blade 2 at the peripheral surface of the cylindrical rod-shaped body and a bottom blade 3 at one end surface of the cylindrical rod-shaped body; a chamfer edge 4 is arranged at the joint of the peripheral edge 2 and the bottom edge 3; the chamfer edge 4 has a chamfer edge rake face 41 and a chamfer edge relief face 42; the chamfer edge flank surface 42 is formed in a curved surface shape.
Referring to fig. 2, let a point on the flank of the chamfer edge be a, point o be the center of the tool, the distance from point a to the connecting line between the c point of the tip of the chamfer edge and the center of the circle o be X, the foot is d, the distance from point a to the tangent line of the circle of revolution of point c around the center of the tool is Y, and the foot from point a to the tangent line is b; the line E-E in fig. 3 is the orthogonal plane of the chamfer edge, the chamfer edge relief angle is β, and the chamfer edge rake angle is γ; the chamfer sword relief angle of curved surface form presents following law, and when X increases, Y increases, and the beta angle grow gradually, and is the bigger away from the knife tip distance promptly, and chamfer sword relief angle is bigger, and the distance of chamfer sword flank face to the machined surface is more far away, and the increase range of its distance is greater than the chamfer sword flank face of planar form. Therefore, the clearance between the rear cutter face of the chamfering edge and the processed surface is gradually increased, and the interference between the cutter and a workpiece can be avoided, so that the friction force is reduced, and the wear resistance of the cutter is improved; finally make this novel high-efficient processing that is applicable to, can promote cutter machining efficiency and cutter life-span.
In this embodiment, the chamfer edge rake surface 41 is a curved surface or a flat surface.
In the present embodiment, the curved surface of the chamfer edge flank surface 42 is a circular arc, but may be a spline curve or a parabola curve.
The value range of the back angle beta of the chamfering edge is 7-15 degrees.
The value range of the front angle gamma of the chamfering edge is 0-8 degrees.
In this embodiment, the width of the chamfer edge is less than or equal to half of the diameter of the cylindrical rod-shaped body.
In this example, the tool specification is D6 × C0.5 × 6L × 4F × D6 × 50 (the diameter of the edge is 6mm, the chamfer edge is 0.5mm, the length of the edge is 6mm, the number of edges is 4, the total length is 50mm, and the shank diameter is 6mm), and the machined stainless steel is exemplified, preferably, the end mill has a helix angle of 35 °, a rake angle γ of the chamfer edge of 3 °, a relief angle β of a flank of a chamfer edge curve of 10 °, an X value of 0.12mm, and a Y value of 0.02 mm. And can be adjusted according to the different materials to be processed.
The utility model discloses a knife face is end milling cutter of curved surface behind the chamfer sword, and knife face 42 establishes to the applicable milling cutter in different diameters, helix angle, sword number of curved surface shape behind the chamfer sword.
The utility model discloses an end mill with curved face as the rear cutter face of a chamfer edge, which adopts the chamfer edge 4 arranged at the joint of a peripheral edge 2 and a bottom edge 3; the chamfer edge 4 has a chamfer edge rake face 41 and a chamfer edge relief face 42; the chamfer edge flank surface 42 is curved, and the distance from the chamfer edge of the chamfer edge flank surface to the chamfer edge is larger, the chamfer edge relief angle is larger, the distance from the chamfer edge flank surface to the surface to be machined is longer, and the increase range of the distance from the chamfer edge flank surface to the surface to be machined is larger than the increase range of the distance from the planar chamfer edge flank surface to the surface to be machined. The structure of the utility model enables the clearance between the rear cutter face of the chamfering edge and the processed surface to be gradually increased, thereby avoiding interference, reducing friction force and improving the wear resistance of the cutter; meanwhile, enough support can be provided, the rigidity of the cutter is guaranteed, the strength and the wear resistance of the chamfer edge part can be effectively enhanced, and the cutter has good collapse resistance and wear resistance under the rough machining condition, so that the service life of the cutter is prolonged.
The foregoing is illustrative of the preferred embodiment of the present invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solutions disclosed above can be used by those skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.
Claims (7)
1. An end mill with a back cutter face of a chamfer edge being a curved surface comprises a cylindrical rod-shaped body; one end of the cylindrical rod-shaped body is provided with a cutting part, and the other end of the cylindrical rod-shaped body is a handle part; the cutting part comprises a peripheral edge positioned on the peripheral surface of the cylindrical rod-shaped body and a bottom edge positioned on one end surface of the cylindrical rod-shaped body; the method is characterized in that: a chamfer edge is arranged at the joint of the peripheral edge and the bottom edge; the chamfering blade is provided with a chamfering blade front blade surface and a chamfering blade rear blade surface; the chamfer edge flank surface is a curved surface shape.
2. The end mill having the chamfer edge flank surface of a curved surface according to claim 1, wherein: in the chamfer edge flank, the greater the distance from the chamfer edge, the greater the chamfer edge relief angle, the greater the distance from the chamfer edge flank to the surface to be machined, and the greater the increase in the distance from the chamfer edge flank to the surface to be machined, the greater the increase in the distance from the chamfer edge flank to the surface to be machined.
3. The end mill having the chamfer edge flank surface of a curved surface according to claim 1, wherein: the front tool face of the chamfer edge is a curved surface or a plane.
4. The end mill having the chamfer edge flank surface of a curved surface according to claim 1, wherein: the curved surface of the back knife face of the chamfering edge is in a circular arc shape, a spline curve shape or a parabola shape.
5. The end mill having the chamfer edge flank surface of a curved surface according to claim 2, wherein: the value range of the back angle beta of the chamfering edge is 7-15 degrees.
6. The end mill having the chamfer edge flank surface of a curved surface according to claim 2, wherein: the value range of the front angle gamma of the chamfering edge is 0-8 degrees.
7. The end mill having the chamfer edge flank surface of a curved surface according to claim 2, wherein: the width of the chamfering edge is less than or equal to half of the diameter of the cylindrical rod-shaped body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022455935.2U CN214212360U (en) | 2020-10-29 | 2020-10-29 | End milling cutter with curved surface on rear cutter face of chamfering edge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022455935.2U CN214212360U (en) | 2020-10-29 | 2020-10-29 | End milling cutter with curved surface on rear cutter face of chamfering edge |
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| CN214212360U true CN214212360U (en) | 2021-09-17 |
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| CN202022455935.2U Active CN214212360U (en) | 2020-10-29 | 2020-10-29 | End milling cutter with curved surface on rear cutter face of chamfering edge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114378345A (en) * | 2021-12-30 | 2022-04-22 | 株洲钻石切削刀具股份有限公司 | Milling cutter for machining and forming large chamfer forming surface |
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2020
- 2020-10-29 CN CN202022455935.2U patent/CN214212360U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114378345A (en) * | 2021-12-30 | 2022-04-22 | 株洲钻石切削刀具股份有限公司 | Milling cutter for machining and forming large chamfer forming surface |
| CN114378345B (en) * | 2021-12-30 | 2023-09-19 | 株洲钻石切削刀具股份有限公司 | Large-chamfer forming surface machining forming milling cutter |
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