A fast-feed milling blade and milling cutter thereof

Abstract

The utility model discloses a fast-feed milling blade and a milling cutter thereof, wherein the fast-feed milling blade comprises a mounting bottom surface, a side mounting surface and a plurality of main cutting edges, and adjacent main cutting edges are connected by sequentially arranged wiper edges and tool tip arcs in a clockwise direction, and the main cutting edges and wiper edges are both straight-line edges, and an angle is provided between the main cutting edges and wiper edges. The main cutting edges and wiper edges of the milling blade are both straight-line edge designs, and during the cutting process, the main deflection angle is always fixed, which can keep the chip thickness consistent during the entire cutting process, and at the same time provide better chip removal space. The double-sided indexable design is adopted, and the tool strength is higher and the versatility is stronger; and the double-sided eight-edge design increases the number of cutting edges to the maximum when the material input is not much different, which can better save tungsten resources and optimize the consumption cost of the tool, thereby significantly reducing the production and processing costs.

Description

Technical Field

[0001] The utility model relates to the technical field of tool design, in particular to a fast-feed milling blade and a milling cutter thereof. Background Art

[0002] Common fast-feed milling inserts on the market include single-sided 4-edge, double-sided 4-edge, double-sided 6-edge, etc. The cutting characteristics of fast-feed milling cutters are fast feed and shallow cutting depth. Therefore, the mainstream design of this type of insert is a curved cutting edge, and it is usually a single-sided insert.

[0003] For example, the patent with announcement number CN205254203U discloses a fast-feed milling blade, including a square blade, the longitudinal section view of the blade is a trapezoid, a screw hole for fixing the blade is provided in the middle of the blade, the four side edges of the upper end face of the blade are all cutting edges, the four side edges are all arc-shaped side edges, and the middle parts of the four side edges all protrude outward, and the blade angle corresponding to the point on the left of any two points on the same side edge is greater than the blade angle corresponding to the point on the right. The setting of blade angle variation, after the milling blade is installed on the tool holder, when the milling machine is processed, the right end of the blade side edge first contacts the workpiece for milling, and the blade angle on the right side of the side edge is relatively small, indicating that the right side of the side edge is sharper and easier to cut the workpiece, and the side edge is arc-shaped, and the middle part protrudes outward, indicating that the cutting depth on the right side of the side edge is relatively shallow, and thus the structural strength requirements on the right side of the side edge are relatively low.

[0004] The fast-feed milling insert in the above patent is a curved cutting edge insert. However, judging from its structure and market application feedback, in the design of its curved side edge cutting edge, the main deflection angle is the angle between the tangent line of the arc and the horizontal plane. As the arc continues, the main deflection angle will continue to change, which will cause the chip thickness of the milling insert to change continuously during cutting, and it is impossible to maintain a consistent cutting thickness. In addition, because the chip thickness changes all the time, the cutting force and cutting temperature at different cutting edge positions will be different, which will ultimately affect the service life of the milling insert. At the same time, it is easy to cause the risk of chipping during the cutting process. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a fast-feed milling blade capable of maintaining a consistent cutting depth in view of the defects of the prior art.

[0006] The purpose of the utility model is achieved through the following technical solutions:

[0007] A fast-feed milling insert comprises a mounting bottom surface, a side mounting surface and a plurality of main cutting edges. Adjacent main cutting edges are connected in a clockwise direction by sequentially arranged wiper edges and tool tip arcs. Both the main cutting edges and the wiper edges are straight edges, and an angle is formed between the main cutting edges and the wiper edges.

[0008] Furthermore, the angle is 12° to 15°.

[0009] Furthermore, the flank surface of the wiper edge is concave relative to the side mounting surface to form a concave surface, and the concave surface and the mounting bottom surface form a concave angle.

[0010] Furthermore, the recessed angle is 93° to 95°.

[0011] Furthermore, the main cutting edge and the wiper edge have edge bands.

[0012] Furthermore, the milling blade is a double-sided milling blade.

[0013] Furthermore, the milling insert is an eight-edged milling insert.

[0014] Furthermore, the milling insert is formed by pressing or grinding.

[0015] A milling cutter comprises a cutter disc and the fast-feed milling insert as described above.

[0016] Furthermore, when the milling blade is mounted on the cutter head, an angle of 89° to 90° is formed between the wiper edge and the axis of the cutter head.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1) The main cutting edge and wiper edge of the milling insert are both designed as straight edges. During the cutting process, the main deflection angle is always fixed, which can keep the chip thickness consistent throughout the cutting process and provide better chip evacuation space.

[0019] 2) The double-sided indexable design makes the tool stronger and more versatile; the double-sided eight-edge design increases the number of cutting edges to the maximum with little difference in material input, which can better save tungsten resources and optimize tool consumption costs, thereby significantly reducing production and processing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional line drawing of the fast feed milling insert described in Example 1;

[0021] Figure 2 for Figure 1 3D structure diagram of the view;

[0022] Figure 3 The diagram is a schematic diagram of the angle between the flank surface of the wiper edge and the mounting bottom surface in the fast feed milling insert described in Example 1;

[0023] Figure 4 A top view of the fast feed milling insert described in Example 1;

[0024] Figure 5 This is a schematic diagram of the structure of the fast feed milling blade described in Example 1 installed on the cutter disc. DETAILED DESCRIPTION

[0025] In order to clearly illustrate the technical features of the present solution, the present technical solution is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0027] In addition, in the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0028] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0030] Example 1

[0031] A fast feed milling cutter comprises a cutter head 1 and a fast feed milling blade 2. Figure 1 As shown, it is a double-sided design, including a first mounting bottom surface 211, a second mounting bottom surface 212, a mounting hole 22, a plurality of side mounting surfaces 23 and a plurality of main cutting edges 24, the first mounting bottom surface 211 and the second mounting bottom surface 212 are arranged oppositely and in parallel, the first / second mounting bottom surface is the mounting surface for mounting the milling insert 2 on the cutter head 1, the side mounting surface 23 is located between the first mounting bottom surface 211 and the second mounting bottom surface 212, the first / second mounting bottom surface and the side mounting surface 23 are both flat planes; adjacent main cutting edges 24 are transitionally connected in a clockwise direction by wiper edges 25 and tool tip arcs 26 arranged in sequence, wherein the main cutting edges 24 and wiper edges 25 are both straight edges, the main cutting edges 24 and wiper edges 25 on the same mounting bottom surface side are located on the same plane, and there is an angle between the main cutting edges 24 and the wiper edges 25, in this embodiment, the angle ( Figure 4 It can be seen intuitively that the included angle is set to 12°~15°, preferably around 13°.

[0032] The main cutting edge 24 and the wiper edge 25 of the milling insert of this embodiment are both designed with straight edges. During the cutting process, the main deflection angle is always fixed, which can keep the chip thickness consistent during the entire cutting process and provide better chip removal space. The straight wiper edge can significantly improve the processing accuracy and make the product processing finish better.

[0033] Figure 1 and Figure 2 In the embodiment, the wiper edge flank surface 27 has a concave design relative to the side mounting surface where the wiper edge 25 is located, forming a concave surface 271. The concave surface 271 and the corresponding mounting bottom surface to which the wiper edge 25 is close form a concave angle, such as Figure 3 As shown, the recessed angle is 93° to 95°, preferably about 94°. The recessed surface design can provide a good chip removal space for chips.

[0034] As mentioned above, the milling insert is a double-sided insert, more specifically, a double-sided eight-edge milling insert, with four side mounting surfaces and four main cutting edges corresponding to each mounting bottom surface. Figure 2 and Figure 3 As shown, the adjacent side mounting surfaces 23 are connected by the arc surface 28, and the arc surface 28 and the tool tip arc 26 have the same direction. However, the structures of the first mounting bottom surface side and the second mounting bottom surface side in the axial direction of the milling insert are not completely the same, but have a staggered arrangement: that is, when a certain wiper edge and the wiper edge flank surface on the first mounting bottom surface side are located on a certain side mounting surface, the wiper edge and the wiper edge flank surface closest to the certain wiper edge on the second mounting bottom surface side will be located on the adjacent side mounting surface. Finally, the bottom surfaces of the concave surfaces 271 of the two wiper edge flank surfaces are aligned, and at the same time, the arc surface 28 between the adjacent side mounting surfaces on the first mounting bottom surface side and the arc surface 28 between the adjacent side mounting surfaces on the second mounting bottom surface side are also presented as shown in FIG. Figure 4 The offset arrangement shown.

[0035] The eight-edge milling blade design of this embodiment is relatively economical and can alleviate the problem of scarce tungsten resources in tool production materials. Under limited material input, the number of cutting edges is increased to the maximum, which saves tungsten resources on the one hand and significantly reduces the average single-edge consumption cost on the other hand, thereby greatly reducing production and processing costs. In addition, the structural strength of the blade is increased.

[0036] The milling insert of this embodiment is formed by a pressing process.

[0037] Figure 5 The structure of the milling cutter is shown in which the milling cutter blade is installed on the cutter head, and the wiper edge 25 of the milling cutter blade forms an angle of 89° to 90° close to 90° with the axis of the cutter head 1. When milling, the milling cutter can achieve shallow cutting with consistent cutting depth and fast walking, and has excellent processing finish.

[0038] Example 2

[0039] A fast feed milling cutter comprises a cutter head 1 and a fast feed milling blade 2. Figure 1As shown, it is a double-sided design, including a first mounting bottom surface 211, a second mounting bottom surface 212, a mounting hole 22, a plurality of side mounting surfaces 23 and a plurality of main cutting edges 24, the first mounting bottom surface 211 and the second mounting bottom surface 212 are arranged oppositely and in parallel, the first / second mounting bottom surface is the mounting surface for mounting the milling insert 2 on the cutter head 1, the side mounting surface 23 is located between the first mounting bottom surface 211 and the second mounting bottom surface 212, the first / second mounting bottom surface and the side mounting surface 23 are both flat planes; adjacent main cutting edges 24 are transitionally connected in a clockwise direction by wiper edges 25 and tool tip arcs 26 arranged in sequence, wherein the main cutting edges 24 and wiper edges 25 are both straight edges, the main cutting edges 24 and wiper edges 25 on the same mounting bottom surface side are located on the same plane, and there is an angle between the main cutting edges 24 and the wiper edges 25, in this embodiment, the angle ( Figure 4 It can be seen intuitively that the included angle is set to 12°~15°, preferably around 13°.

[0040] The main cutting edge 24 and the wiper edge 25 of the milling insert of this embodiment are both designed with straight edges. During the cutting process, the main deflection angle is always fixed, which can keep the chip thickness consistent during the entire cutting process and provide better chip removal space. The straight wiper edge can significantly improve the processing accuracy and make the product processing finish better.

[0041] Figure 1 and Figure 2 In the embodiment, the wiper edge flank surface 27 has a concave design relative to the side mounting surface where the wiper edge 25 is located, forming a concave surface 271. The concave surface 271 and the corresponding mounting bottom surface to which the wiper edge 25 is close form a concave angle, such as Figure 3 As shown, the recessed angle is 93° to 95°, preferably about 94°. The recessed surface design can provide a good chip removal space for chips.

[0042] As mentioned above, the milling insert is a double-sided insert, more specifically, a double-sided eight-edge milling insert, with four side mounting surfaces and four main cutting edges corresponding to each mounting bottom surface. Figure 2 and Figure 3 As shown, the adjacent side mounting surfaces 23 are connected by the arc surface 28, and the arc surface 28 and the tool tip arc 26 have the same direction. However, the structures of the first mounting bottom surface side and the second mounting bottom surface side in the axial direction of the milling insert are not completely the same, but have a staggered arrangement: that is, when a certain wiper edge and the wiper edge flank surface on the first mounting bottom surface side are located on a certain side mounting surface, the wiper edge and the wiper edge flank surface closest to the certain wiper edge on the second mounting bottom surface side will be located on the adjacent side mounting surface. Finally, the bottom surfaces of the concave surfaces 271 of the two wiper edge flank surfaces are aligned, and at the same time, the arc surface 28 between the adjacent side mounting surfaces on the first mounting bottom surface side and the arc surface 28 between the adjacent side mounting surfaces on the second mounting bottom surface side are also presented as shown in FIG. Figure 4 The offset arrangement shown.

[0043] The eight-edge milling blade design of this embodiment is relatively economical and can alleviate the problem of scarce tungsten resources in tool production materials. Under limited material input, the number of cutting edges is increased to the maximum, which saves tungsten resources on the one hand and significantly reduces the average single-edge consumption cost on the other hand, thereby greatly reducing production and processing costs. In addition, the structural strength of the blade is increased.

[0044] The milling insert of this embodiment is formed by a pressing process.

[0045] Figure 5 The structure of the milling cutter is shown in which the milling cutter blade is installed on the cutter head, and the wiper edge 25 of the milling cutter blade forms an angle of 89° to 90° close to 90° with the axis of the cutter head 1. When milling, the milling cutter can achieve shallow cutting with consistent cutting depth and fast walking, and has excellent processing finish.

[0046] The difference between this embodiment and embodiment 1 is that: in order to expand the cutting applicability of the milling insert, a margin is provided on the main cutting edge and the finishing edge, so that the milling insert can be used for heavy-load cutting processing. The margin design can increase the wear resistance and working reliability of the tool.

[0047] Example 3

[0048] The difference between this embodiment and embodiment 1 is that the milling blade is formed by grinding, and the grinding process is based on the pressing process and then grinding, which can make the dimensional accuracy and side mounting surface of the milling blade better, and can have a positive impact on the processing performance and service life of the milling tool.

[0049] Obviously, the above embodiments are merely examples for clearly illustrating the technical solution of the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A fast feed milling insert, characterized in that: It comprises a mounting bottom surface, a side mounting surface and a plurality of main cutting edges. Adjacent main cutting edges are connected in a clockwise direction by sequentially arranged wiper edges and tool tip arcs. Both the main cutting edges and wiper edges are straight edges, and there is an angle between the main cutting edges and the wiper edges.

2. The fast feed milling insert according to claim 1, characterized in that: The angle is 12° to 15°.

3. The fast feed milling insert according to claim 2, characterized in that: The back surface of the wiper blade is concave relative to the side mounting surface to form a concave surface, and the concave surface and the mounting bottom surface form a concave angle.

4. The fast feed milling insert according to claim 3, characterized in that: The recessed angle is 93° to 95°.

5. The fast feed milling insert according to claim 1, characterized in that: The main cutting edge and the wiper edge are provided with edge bands.

6. The fast feed milling insert according to claim 1, characterized in that: The milling insert is a double-sided milling insert.

7. The fast feed milling insert according to claim 6, characterized in that: The milling insert is an eight-edged milling insert.

8. The fast feed milling insert according to claim 1, characterized in that: The milling insert is formed by pressing or grinding.

9. A milling cutter, characterized in that: The invention comprises a cutter disc and a fast-feed milling blade as claimed in any one of claims 1 to 8.

10. The milling cutter according to claim 9, characterized in that When the milling blade is mounted on the cutter head, an angle of 89° to 90° is formed between the wiper edge and the axis of the cutter head.

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