CN209491378U - A round nose milling cutter - Google Patents

Abstract

The utility model relates to a milling cutter technical field, more specifically says, it relates to a round nose milling cutter, and its technical scheme main points are: a round nose milling cutter comprises a cutter bar and a cutter head connected with the cutter bar, wherein a spiral chip groove is arranged on the cutter head, a peripheral edge is arranged on the side part of the cutter head, and an end edge is arranged at the end part of the cutter head; the peripheral edge is connected with the end edge through an arc to form an arc-shaped sharp corner at the arc; the tool bit is also provided with a chamfering surface for chamfering the sharp corner, the chamfering surface comprises an end edge front angle chamfering surface and a peripheral edge front angle chamfering surface, and the end edge front angle chamfering surface and the peripheral edge front angle chamfering surface are intersected. According to the utility model provides a technical scheme can strengthen the structural strength of sharp angle department through the sharp angle department processing chamfer face at the tool bit, provides the protection to the sharp angle, makes the wearability of sharp angle department better, and is difficult damaged to life is longer.

Description

A round nose milling cutter

technical field

The utility model relates to the technical field of milling cutters, in particular to a round nose milling cutter.

Background technique

A milling cutter is a rotating tool with one or more teeth for milling. When working, each knife tooth cuts off the allowance of the workpiece intermittently in turn. Milling cutters are mainly used for machining planes, steps, grooves, forming surfaces and cutting off workpieces on milling machines.

At present, in the design of some parts, the root of the cavity is designed with arc transition edges of different sizes. These arc transition edges are generally processed by round nose milling cutters. When the round nose milling cutter is processing parts, its service life is generally required to be as long as possible. However, at present, it is difficult to break through long-term processing in terms of the life of the round nose milling cutter, mainly because the tip of the cutter is easy to wear, which leads to deviations in the accuracy and size of the workpiece. Therefore, how to improve the service life of cutting tools is getting more and more research and attention from all parties.

Contents of the invention

In view of this, the utility model provides a round nose milling cutter, the main purpose of which is to improve the service life of the cutter.

In order to achieve the above object, the utility model mainly provides the following technical solutions:

The embodiment of the utility model provides a round nose milling cutter, which includes a cutter bar and a cutter head connected with the cutter bar. The cutter head is provided with a spiral flute, and the side of the cutter head has a peripheral edge, and have an end edge at the end;

The peripheral edge and the end edge are connected by an arc to form an arc-shaped sharp corner at the arc;

Wherein, the cutter head also has a chamfering surface for chamfering the sharp corner, and the chamfering surface includes an end edge rake chamfering surface and a peripheral edge rake chamfering surface, and the end edge rake chamfering surface It intersects with the rake chamfer surface of the peripheral edge.

In the above technical solution, by processing the chamfered surface at the sharp corner of the cutter head, the structural strength of the sharp corner can be enhanced, the sharp corner can be protected, the wear resistance of the sharp corner is better, and it is not easy to be damaged, so that it can be used Long life.

The utility model is further set as: the intersection line between the rake angle chamfering surface of the end blade and the peripheral edge chamfering surface has an intersection point with the arc, and the arc length between the intersection point and the center point of the arc is 0-0.05 mm. Preferably, the arc length between the intersection point and the arc center point is 0.

By adopting the above-mentioned technical scheme, the arc length between the intersection point and the center point of the arc will not be too large or too small, resulting in uneven transition between the peripheral edge and the end edge of the chamfer, and the extrusion of material at the chamfer is easy to occur. Phenomenon, affecting the processing quality of the workpiece.

The utility model is further configured as follows: the width of the rake chamfering surface of the peripheral blade increases gradually along the direction in which the peripheral blade extends toward the arc.

By adopting the above technical scheme, the structural strength of the sharp corner can be further enhanced, the stress concentration phenomenon at the sharp corner can be reduced, the wear resistance of the sharp corner is better, and it is not easy to be damaged, thereby further improving the round nose milling of the utility model. knife life.

The utility model is further configured as follows: the width of the rake chamfering surface of the end edge gradually increases along the direction of the arc extending toward the end edge.

By adopting the above technical scheme, the structural strength of the sharp corner can be further enhanced, the stress concentration phenomenon at the sharp corner can be reduced, the wear resistance of the sharp corner is better, and it is not easy to be damaged, thereby further improving the round nose milling of the utility model. knife life.

The utility model is further configured as: the cutter head and the cutter rod are integrally formed.

By adopting the above technical solution, the connection stability between the cutter head and the cutter bar can be improved, and the overall strength of the round nose milling cutter of the present utility model is increased.

The utility model is further configured as: the outer diameters of the cutter head and the cutter rod are consistent.

By adopting the above-mentioned technical scheme, it has the effect of facilitating processing.

By virtue of the above technical solution, the utility model round nose milling cutter has at least the following beneficial effects:

In the technical solution provided by the utility model, by processing the chamfered surface at the sharp corner of the cutter head, the structural strength of the sharp corner can be enhanced, the sharp corner can be protected, the wear resistance of the sharp corner is better, and it is not easy to breakage, resulting in a longer service life.

The above description is only an overview of the technical solution of the utility model. In order to understand the technical means of the utility model more clearly and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiment of the utility model with accompanying drawings. back.

Description of drawings

Fig. 1 is a schematic structural view of a round nose milling cutter provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of an enlarged structure at point A in FIG. 1 .

Reference signs: 1, cutter bar; 2, cutter head; 21, spiral flute; 22, peripheral edge; 23, end edge; 24, circular arc; 31, rake chamfering surface of peripheral edge; 32, end Rake angle chamfering surface; 301, intersection line; 302, intersection point; 100, round nose milling cutter.

Detailed ways

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 part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second" and so on in the embodiments of the present invention, the descriptions of "first", "second" and so on are only for descriptive purposes, and should not be interpreted as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present invention.

As shown in FIG. 1 and FIG. 2 , an embodiment of the present invention proposes a round nose milling cutter 100 , which includes a cutter bar 1 and a cutter head 2 connected with the cutter bar 1 . The cutter head 2 is provided with a spiral flute 21 . The side portion of the cutter head 2 has a peripheral edge 22 and an end portion has an end edge 23 . The peripheral cutting edge 22 and the end cutting edge 23 are connected by an arc 24 to form an arc-shaped sharp corner at the arc 24 . Wherein, the cutter head 2 also has a chamfered surface for chamfering the sharp corners. The chamfered surface includes a peripheral edge rake angle chamfered surface 31 and an end edge rake angle chamfered surface 32 . The end edge rake chamfer surface 32 and the peripheral edge rake chamfer surface 31 intersect and are connected to the above-mentioned arc 24 .

In the technical solution provided above, by processing the chamfered surface at the sharp corner of the cutter head 2, the structural strength of the sharp corner can be enhanced, and the sharp corner can be protected, so that the sharp corner has better wear resistance and is not easy to be damaged. , so that the service life is longer.

Further, as shown in FIG. 2 , the intersection line 301 between the aforementioned end edge chamfering surface 32 and the peripheral edge chamfering surface 31 has an intersection point 302 with the arc 24 . The arc length between the intersection point 302 and the center point of the arc 24 is 0-0.05 mm, preferably, the arc length between the intersection point 302 and the center point of the arc 24 is 0. In this way, the arc length between the intersection point 302 and the center point of the circular arc 24 will not be too large or too small, resulting in an uneven transition between the peripheral edge 22 and the end edge 23 of the chamfer, and material extrusion may easily occur at the chamfer Phenomenon, affecting the processing quality of the workpiece.

Further, as shown in Figure 2, the width of the rake chamfer surface 31 of the peripheral edge gradually increases along the direction in which the peripheral edge 22 extends to the arc 24, so as to further enhance the structural strength at the sharp corner and reduce the The stress concentration phenomenon makes the sharp corners have better wear resistance and is not easy to be damaged, thereby further improving the service life of the round nose milling cutter 100 of the present utility model.

Further, as shown in Figure 2, the width of the aforementioned end edge rake chamfer surface 32 increases gradually along the direction in which the arc 24 extends toward the end edge 23, so as to further enhance the structural strength at the sharp corner and reduce the The stress concentration phenomenon makes the sharp corners have better wear resistance and is not easy to be damaged, thereby further improving the service life of the round nose milling cutter 100 of the present utility model.

Furthermore, the aforementioned cutter head 2 and cutter bar 1 are integrally formed to improve the connection stability between the cutter head 2 and the cutter bar 1 and increase the overall strength of the round nose milling cutter 100 of the present invention.

Further, the outer diameters of the aforementioned cutter head 2 and the cutter bar 1 are consistent, which facilitates processing.

What needs to be explained here is: in the case of no conflict, those skilled in the art can combine the relevant technical features in the above examples according to the actual situation to achieve the corresponding technical effect. Let me repeat them one by one.

The above descriptions are only preferred implementations of the present utility model, and the protection scope of the present utility model is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present utility model all belong to the protection scope of the present utility model. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims (7)

1. a round nose milling cutter, it is characterized in that, comprise cutter bar (1) and the cutter head (2) that is connected with cutter bar (1), described cutter head (2) is provided with helical flute ( 21), the side of the cutter head (2) has a peripheral edge (22), and the end has an end edge (23); The peripheral edge (22) and the end edge (23) are connected by an arc (24) to form an arc-shaped sharp corner at the arc (24); Wherein, the cutter head (2) also has a chamfering surface for chamfering the sharp corner, and the chamfering surface includes a peripheral edge rake chamfering surface (31) and an end edge rake chamfering surface (32), The end edge rake chamfer surface (32) and the peripheral edge rake chamfer surface (31) intersect. 2. The round nose milling cutter according to claim 1, characterized in that, The intersection line (301) between the end edge chamfering surface (32) and the peripheral edge chamfering surface (31) has an intersection point (302) with the arc (24), and the intersection point (302 ) and the center point of the arc (24) have an arc length of 0-0.05 millimeters. 3. The round nose milling cutter according to claim 2, characterized in that, The arc length between the intersection point (302) and the center point of the arc (24) is zero. 4. The round nose milling cutter according to any one of claims 1 to 3, characterized in that, The width of the rake chamfer surface (31) of the peripheral edge gradually increases along the direction in which the peripheral edge (22) extends toward the arc (24). 5. The round nose milling cutter according to any one of claims 1 to 3, characterized in that, The width of the end edge rake chamfer surface (32) increases gradually along the direction in which the arc (24) extends toward the end edge (23). 6. The round nose milling cutter according to any one of claims 1 to 3, characterized in that, The cutter head (2) and the cutter rod (1) are integrally formed. 7. The round nose milling cutter according to any one of claims 1 to 3, characterized in that, The outer diameters of the cutter head (2) and the cutter rod (1) are consistent.