Composite milling cutter

Abstract

The utility model discloses a composite milling cutter which comprises a cutter handle and a cutter head integrally connected to the cutter handle, the cutter head is provided with a plurality of spiral cutting edges and cutter grooves located between every two adjacent cutting edges, and the cutter grooves spirally extend towards the cutter handle from the end face of the cutter head. Each cutting edge comprises an end edge located on the end face of the tool bit, an arc-shaped edge located on the side face of the tool bit and an R-angle edge connected between the end edge and the arc-shaped edge, the arc-shaped edge bends and extends in a C shape from the end connected with the R-angle edge to the other end of the arc-shaped edge, the end edge is used for milling a plane, the arc-shaped edge is used for milling an arc surface, and the R-angle edge is used for milling a three-dimensional surface. According to the milling cutter, the functions of plane milling, arc-shaped surface milling and three-dimensional surface milling can be integrated, the overall machining efficiency is improved, the precision consistency of all machining surfaces can be better guaranteed, the overall machining precision of workpieces is guaranteed, and the surface quality of the workpieces machined by the milling cutter is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to tool technology field, especially in a kind of compound milling cutter. BACKGROUND

[0002] In the field of mechanical processing, milling is a widely used machining process, which is used for shaping and surface processing of various materials. With the continuous development of manufacturing industry, the shape and precision of parts are increasingly improved, and the performance and function diversity of milling cutter, as the key tool for milling, are particularly important.

[0003] In traditional milling, different types of milling cutters are usually needed for different machining requirements, such as face milling, arc face milling and arc milling. For example, face milling generally uses face milling cutters, which are designed to efficiently process flat surfaces; arc face milling often uses ball nose milling cutters or end milling cutters to adapt to complex surface machining; arc milling requires specific arc milling cutters to achieve precise arc contour machining.

[0004] The use of such single-function milling cutters has many drawbacks:

[0005] Frequent tool replacement: In a machining task that includes multiple milling requirements, operators need to frequently replace different types of milling cutters, which not only increases auxiliary processing time and reduces production efficiency, but also may cause machining precision deviation due to frequent tool replacement.

[0006] High tool management cost: Enterprises need to stock a large number of different types of milling cutters to meet various machining requirements, which not only occupies a large amount of funds and storage space, but also increases the difficulty of tool management. In addition, the specifications and models of different tools are numerous, which may cause confusion during storage and retrieval, leading to incorrect use of tools and affecting processing quality.

[0007] Consistency of machining precision is difficult to guarantee: The manufacturing precision and wear characteristics of different tools differ. Frequent replacement of tools for different types of milling machining may make it difficult to guarantee the precision consistency of each machined surface. For example, when machining a part with a flat surface, an arc surface and an arc transition, due to changes in cutting force, tool radius compensation and other factors of different tools, unevenness and size deviation may occur at the junction of different machined surfaces.

[0008] In summary, it is of great significance to develop a compound special milling cutter that can efficiently integrate face milling, arc face milling and arc milling functions, and is easy to operate and has high machining precision, to solve the many problems existing in current milling machining and meet the higher requirements of modern manufacturing industry for processing efficiency and precision. INVENTION CONTENTS

[0009] The utility model wants to solve the problem to provide a compound milling cutter to overcome the single function of the prior art milling cutter, the frequent replacement of the cutter for different milling machining is needed and the defects that the machining precision consistency is difficult to guarantee.

[0010] The utility model discloses a compound milling cutter, including: handle and the cutter head of integral connection in handle, be equipped with a plurality of helical edges and the cutter groove between two adjacent cutter edge of cutter head on, the cutter groove from the end face of cutter head helical extension towards handle direction, the cutter edge all include the end blade on the end face of cutter head, the arc blade on the side of cutter head and the R angle blade connected between end blade and arc blade, the arc blade from the one end of R angle blade connection towards its other end C type bending extension, wherein the end blade is used for milling plane, the arc blade is used for milling arc surface, and the R angle blade is used for milling three-dimensional surface.

[0011] As a further improvement of the utility model, the arc blade has a relief surface, and the relief surface of the arc blade is provided with a shock-absorbing ligament along the edge of the arc blade.

[0012] As a further improvement of the utility model, the relief angle of the shock-absorbing ligament is α1, and 11°≤α1≤13°.

[0013] As a further improvement of the utility model, the width of the shock-absorbing ligament is L1, and 0.09mm≤L1≤0.11mm.

[0014] As a further improvement of the utility model, the cutter groove has a rake angle, and the rake angle of the cutter groove is a positive rake angle.

[0015] As a further improvement of the utility model, the end blade is provided with a first chip pocket.

[0016] As a further improvement of the utility model, the rake angle of the first chip pocket is β, and 9°≤β≤11°.

[0017] As a further improvement of the utility model, the end blade has a first relief angle and a second relief angle, the first relief angle and the second relief angle of the end blade are λ and б respectively, and 9°≤λ≤11°, 23°≤б≤27°.

[0018] As a further improvement of the utility model, the R angle blade has a rake surface, and the rake surface of the R angle blade is provided with a second chip pocket along the edge of the R angle blade.

[0019] As a further improvement of the utility model, the number of the cutter edges is 2-6, and the plurality of cutter edges are centrally symmetrically distributed.

[0020] The utility model discloses a beneficial effect is: the utility model provides a kind of composite milling cutter, can integrate plane milling, cambered surface milling and three-dimensional surface milling function, make it can be flexibly applied to the machining of various complex shape workpieces, when the workpiece including multiple milling requirements is processed, without frequently changing tool, a variety of functions of the milling cutter can complete multiple milling machining task, greatly shorten the processing time, improve overall processing efficiency, reduce the positioning error caused by multiple clamping and tool changing, simultaneously avoid the change of cutting force, tool radius compensation and other parameters caused by replacing different tools, this makes the transition between plane, cambered surface and three-dimensional surface milling more smoothly, can better guarantee the precision consistency between each processing surface, ensure the overall machining precision of workpiece, especially suitable for the machining of high-precision requirement parts, in addition, also save enterprise storage space, simplify tool management process, reduce the risk of wrong use caused by poor tool management;Further, according to the different requirements of plane milling, three-dimensional surface milling and arc milling, special cutting edge shape and parameter are designed, so that the workpiece surface quality processed by milling cutter is higher. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 It is the perspective view of the utility model composite milling cutter;

[0023] Figure 2 It is the front view of the utility model composite milling cutter;

[0024] Figure 3 It is the bottom view of the utility model composite milling cutter;

[0025] Figure 4 It is the section view of the utility model composite milling cutter along Figure 2 B-B direction;

[0026] Figure 5 It is the section view of the utility model composite milling cutter along Figure 3 C-C direction;

[0027] Figure 6 It is the section view of the utility model composite milling cutter along Figure 1 radial direction in A-A position;

[0028] Figure 7 It is the section view of the utility model composite milling cutter along Figure 1 axial direction in A-A position;

[0029] Figure 8 Figure 1 is a schematic diagram of the use state of the composite milling cutter of the present application.

[0030] The following description will be made in conjunction with the drawings:

[0031] 1, shank; 2, head; 21, cutting edge; 211, end edge; 2111, first chip flute; 212, arc-shaped edge; 2121, shock-absorbing ligament; 213, R-angle edge; 2131, second chip flute; 22, flute. DETAILED DESCRIPTION

[0032] The present application will be described in detail below with reference to the drawings and specific embodiments.

[0033] The embodiments of this application are illustrated by way of example in the following drawings and specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present application from the disclosure. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. The present application can also be implemented or applied by other different specific embodiments, and the details in the specification can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0034] It should be noted that the various aspects of the embodiments described below are within the scope of the appended claims. It should be apparent that the aspects described herein can be embodied in a wide variety of forms and that any specific structure and / or function described herein is merely illustrative. Based on the teachings herein one skilled in the art should appreciate that an aspect described herein can be implemented independently of any other aspects and that two or more of these aspects can be combined in various ways. For example, an apparatus can be implemented or a method can be practiced using any number of the aspects set forth herein. In addition, such an apparatus can be implemented or such a method can be practiced using other structure and / or functionality in addition to or other than one or more of the aspects set forth herein.

[0035] It should also be noted that the drawings included in the following embodiments are only to illustrate the basic concept of the present application, and only show the components related to the present application, not the number, shape and size of the components when actually implemented. The actual implementation of each component may be a random change in shape, number and proportion, and the layout of the components may be more complex.

[0036] Also in the following description, specific details are given to provide thorough understanding of examples. However, one skilled in the relevant art will understand that the examples can be practiced without these specific details.

[0037] The technical solutions provided by the embodiments of the present application are described below with reference to the drawings.

[0038] Referring to Figures 1 to 8 The utility model provides a kind of composite milling cutter, it include: shank 1 and tool bit 2, shank 1 is usually cylindrical, tool bit 2 is integrally connected in the one end of shank 1, i.e.

[0039] In the embodiment, the diameter of shank 1 is specifically 12mm.

[0040] Further, tool bit 2 is provided with a plurality of helical cutting edges 21 and a tool groove 22 between adjacent two cutting edges 21, wherein the tool groove 22 extends helically from the end face of tool bit 2 towards shank 1.

[0041] In the utility model, each cutting edge 21 includes an end edge 211, an arc edge 212 and an R-angle edge 213. The end edge 211 is located on the end face of tool bit 2, which is used for milling a plane; the arc edge 212 is located on the side face of tool bit 2, which extends in a C-shaped curve from one end connected with the R-angle edge 213 to the other end, and is used for milling an arc surface; the R-angle edge 213 is located at the R-angle position of tool bit 2, and is connected between the end edge 211 and the arc edge 212, which is used for milling a complex three-dimensional surface.

[0042] As Figure 8 shown, the composite milling cutter can integrate the functions of plane milling, arc surface milling and three-dimensional surface milling, so that it can be flexibly applied to the machining of various complex-shaped workpieces. When machining a workpiece with multiple milling requirements, the milling cutter can complete multiple milling tasks by using its multiple functions, greatly shortening the machining time, improving the overall machining efficiency, reducing the positioning error caused by multiple clamping and tool changing, and avoiding the changes of cutting force, tool radius compensation and other parameters caused by changing different tools. This makes the transition between plane milling, arc surface milling and three-dimensional surface milling more smooth, better ensures the precision consistency between various machined surfaces, ensures the overall machining precision of the workpiece, is particularly suitable for machining high-precision parts, and also saves enterprise storage space, simplifies tool management process and reduces the risk of incorrect use caused by poor tool management.

[0043] Figure 4 The cross-sectional view of the composite milling cutter along Figure 2 the B-B direction is shown in FIG. Figure 4As shown, the tool groove 22 has a rake angle, and the rake angle of the tool groove 22 is a positive rake angle, which can improve the chip performance of the milling cutter, and at the same time ensures the wear resistance of the milling cutter, so that the milling cutter has higher machining surface quality and longer tool service life.

[0044] Preferably, the rake angle of the tool groove 22 is θ, and 11°≤θ≤13°.

[0045] Continuing to refer to Figure 4 In the embodiment, the peripheral edge width of the tool edge 21 is L2, and L2=2±0.01mm.

[0046] Referring to Figure 2 , the curved edge 212 has a relief surface, and the relief surface of the curved edge 212 is provided with a shock-absorbing ligament 2121 along the edge of the curved edge 212. The utility model adopts the shock-absorbing ligament 2121 design on the relief surface of the curved edge 212, which can greatly improve the machining quality of the arc surface of the product.

[0047] Preferably, the relief angle of the shock-absorbing ligament 2121 is α1, and 11°≤α1≤13°; the width of the shock-absorbing ligament 2121 is L1, and 0.09mm≤L1≤0.11mm. Specifically, α1 in the embodiment is 12°, and L1 is 0.1mm.

[0048] In addition, the relief surface of the curved edge 212 also has a second relief angle and a third relief angle, Figure 6 As shown, the utility model composite milling cutter is in Figure 1 A-A position along the radial section view, the second relief angle and the third relief angle of the profile of the curved edge 212 in the radial direction are α2 and α3 respectively, and in the embodiment, α2=25° and α3=35°. Figure 7 As shown, the utility model composite milling cutter is in Figure 1 A-A position along the axial section view, the second relief angle and the third relief angle of the profile of the curved edge 212 in the radial direction are α4 and α5 respectively, and in the embodiment, α4=18° and α5=25°.

[0049] Referring to Figure 3 , the end edge 211 is provided with a first chip pocket 2111, which is used for preventing chip accumulation during plane milling, guiding the chip to be discharged in a specific direction, and ensuring that the milling process continues and is stable.

[0050] Preferably, the rake angle of the first chip pocket 2111 is β, and 9°≤β≤11°, preferably 10°

[0051] As Figure 5As shown, the end edge 211 has a first clearance angle and a second clearance angle, the first clearance angle and the second clearance angle of the end edge 211 are λ and β respectively, and 9°≤λ≤11°, 23°≤β≤27°. In this embodiment, λ is preferably 10°, and β is preferably 25°, the first clearance width of the end edge 211 is L3, and L3=0.6±0.05mm.

[0052] It is worth mentioning that, as shown, Figure 2 As shown, the R-angle edge 213 has a rake face, the rake face of the R-angle edge 213 is provided with a second chip pocket 2131 along the edge of the R-angle edge 213, the second chip pocket 2131 is used to prevent chip accumulation during three-dimensional surface milling, guide the chip to be discharged in a specific direction, ensure the continuous and stable progress of the milling process, and the existence of the second chip pocket 2131 makes the structure of the R-angle edge 213 more reasonable, helps to disperse the cutting force, and when machining a three-dimensional curved surface, the cutting force is complex and variable, the second chip pocket 2131 helps to uniformly distribute the stress, avoids stress concentration in the local R-angle edge 213, enhances the strength and rigidity of the milling cutter cutting part, and enables the milling cutter to withstand greater cutting force and stably perform three-dimensional surface machining.

[0053] Among them, the number of cutting edges 21 is 2-6, and in this embodiment, the number is 3, and the three cutting edges 21 are centrally symmetrically distributed.

[0054] The utility model discloses a special cutting edge shape and parameter are designed according to the different requirements of plane milling, three-dimensional surface milling and arc milling, the end edge 211 can guarantee the flatness of the plane when plane milling is carried out, and the R-angle edge 213 and the arc edge 212 can effectively reduce the corrugation and roughness of the machined surface when three-dimensional surface milling and arc milling are carried out, and through the targeted design, the surface quality of the workpiece machined by the milling cutter is higher.

[0055] It can be seen that the composite milling cutter can integrate plane milling, arc surface milling and three-dimensional surface milling functions, can be flexibly applied to machining of various complex-shaped workpieces, can complete various milling machining tasks by using the multiple functions of the milling cutter when machining workpieces with multiple milling requirements, greatly shortens the machining time, improves the overall machining efficiency, reduces the positioning error caused by multiple clamping and tool changing, avoids the changes of cutting force, tool radius compensation and other parameters caused by changing different tools, makes the transition between plane milling, arc surface milling and three-dimensional surface milling more smooth, can better ensure the precision consistency between various machined surfaces, ensures the overall machining precision of the workpiece, is particularly suitable for machining of parts with extremely high precision requirements, and saves enterprise storage space, simplifies tool management process and reduces the risk of incorrect use caused by poor tool management.

[0056] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements within the technical scope disclosed by the present application can be easily conceived by the person skilled in the art, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A composite milling cutter, comprising a cutter shank (1) and a cutter head (2) integrally connected to the cutter shank (1), the cutter head (2) being provided with a plurality of helical cutting edges (21) and a cutting groove (22) between two adjacent cutting edges (21), the cutting groove (22) extending helically from an end face of the cutter head (2) towards the cutter shank (1); characterized in that: The tool edges (21) each comprise an end edge (211) on the end face of the tool head (2), an arc-shaped edge (212) on the side face of the tool head (2), and an R-angle edge (213) connected between the end edge (211) and the arc-shaped edge (212), the arc-shaped edge (212) extending in a C-shaped curve from one end connected with the R-angle edge (213) to the other end, wherein the end edge (211) is used for milling a plane, the arc-shaped edge (212) is used for milling an arc surface, and the R-angle edge (213) is used for milling a three-dimensional surface.

2. The complex milling cutter according to claim 1, characterized in that: The arc-shaped edge (212) has a relief surface, and the relief surface of the arc-shaped edge (212) is provided with a shock-absorbing ligament (2121) along the edge of the arc-shaped edge (212).

3. The complex milling cutter according to claim 2, characterized in that: The clearance angle of the shock-absorbing ligament (2121) is α1, and 11°≤α1≤13°.

4. The complex milling cutter according to claim 2, characterized in that: The width of the shock-absorbing ligament (2121) is L1, and 0.09mm≤L1≤0.11mm.

5. The complex milling cutter according to claim 1, characterized in that: The tool groove (22) has a rake angle, and the rake angle of the tool groove (22) is a positive rake angle.

6. The composite milling cutter according to claim 1, characterized in that: The end edge (211) is provided with a first chip pocket (2111).

7. The complex milling cutter according to claim 6, characterized in that: The rake angle of the first chip pocket (2111) is β, and 9°≤β≤11°.

8. The complex milling cutter according to claim 1, characterized in that: The end edge (211) has a first clearance angle and a second clearance angle, and the first clearance angle and the second clearance angle of the end edge (211) are λ and б respectively, and 9°≤λ≤11°, 23°≤б≤27°.

9. The complex milling cutter according to claim 1, characterized in that: The R-angle edge (213) has a rake surface, and the rake surface of the R-angle edge (213) is provided with a second chip pocket (2131) along the edge of the R-angle edge (213).

10. The complex milling cutter according to claim 1, characterized in that: The number of the tool edges (21) is 2-6, and the plurality of tool edges (21) are centrally symmetrically distributed.

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