Tool bit for spiral milling cutter and spiral milling cutter

Abstract

The utility model relates to the field of diamond cutters, in particular to a cutter bit for a spiral milling cutter and the spiral milling cutter. The cutter head for the spiral milling cutter comprises a cylindrical base body, a spiral groove is formed in the periphery of the base body, diamond micro powder fixedly covers the groove wall of the spiral groove through sintering, and a cutting edge is formed on the edge of the spiral groove. The cylindrical base body is arranged, and the spiral groove is formed in the peripheral face of the base body, so that the base body can be conveniently formed into the shape of the tool bit; the diamond micro-powder is sintered and fixedly covered in the spiral groove, so that a part with high structural strength can be conveniently formed, and a cutting edge can be conveniently formed, that is, in the forming process, the spiral groove firstly machined in the base body is related to a cutting edge on a final spiral milling cutter, and the formed diamond micro-powder layer is also convenient for directly forming the cutting edge; therefore, the problem of high welding difficulty caused by welding the diamond compact on the cutter head of the spiral milling cutter in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the field of diamond cutting tools, in particular to a cutter head for a spiral milling cutter and a spiral milling cutter. Background Art

[0002] Diamond tools have the advantages of extremely high hardness and wear resistance, low friction coefficient, high elastic modulus, high thermal conductivity, low thermal expansion coefficient, and low affinity with non-ferrous metals. They can be used for precision machining of non-metallic hard and brittle materials such as graphite, highly wear-resistant materials, composite materials, high-silicon aluminum alloys and other tough non-ferrous metal materials.

[0003] There is a scheme in the prior art to apply diamond composite sheets to spiral milling cutters. Diamond composite sheets are generally formed on the upper end face of a cylindrical substrate to form a diamond powder layer, and the diamond composite sheets on the milling cutter need to be arranged in a spiral. Therefore, in the prior art, a spirally arranged cutter groove is generally machined on the cutter head first, and then the diamond composite sheet is welded and set in the cutter groove. For example, a Chinese utility model patent with an authorization announcement date of CN201446277U and an authorization announcement date of May 5, 2010 discloses a diamond spiral milling cutter, which includes a cutter body and a cutter head, wherein a sheet-shaped welding position is provided on the cutter head, and the welding position is used to weld a diamond blade, and a chip removal groove is provided between the welding position and the welding position. When the milling cutter is processing, the diamond blade protruding from the surface of the cutter head is used to cut the surface to be processed.

[0004] However, in the above technical solution, the cutter head needs to be processed first to form multiple cutter grooves, and then the diamond blades are welded and set in the cutter grooves. During the welding process, the diamond blades are difficult to weld due to their small size and the need to arrange the diamond blades in an orderly manner. Utility Model Content

[0005] The purpose of the utility model is to provide a cutter head for a spiral milling cutter, so as to solve the problem of great difficulty in welding diamond composite sheets on the cutter head of the spiral milling cutter in the prior art; the purpose of the utility model is also to provide a spiral milling cutter for solving the above-mentioned problem.

[0006] In order to achieve the above-mentioned purpose, the cutter head for the spiral milling cutter in the utility model adopts the following technical scheme:

[0007] A cutter head for a spiral milling cutter comprises a cylindrical base body, a spiral groove is provided on the outer periphery of the base body, the groove wall of the spiral groove is covered with diamond powder by sintering and fixing, and the edge of the spiral groove forms a cutting edge.

[0008] Furthermore, the spiral groove extends to both ends of the base body respectively.

[0009] Furthermore, there are at least two spiral grooves, and the plurality of spiral grooves are evenly arranged on the outer circumference of the base.

[0010] Furthermore, the cross section of the spiral groove is in the shape of an arc.

[0011] The beneficial effects of the utility model are as follows: the utility model improves the existing cutter head for spiral milling cutters, by providing a cylindrical base body and opening a spiral groove on the outer peripheral surface of the base body, so as to facilitate the forming of the base body into the shape of the cutter head, and facilitate the forming into the cutter head of the spiral milling cutter; by sintering and fixing the diamond powder covered in the spiral groove, it is convenient to form a part with high structural strength, and facilitate the forming into a cutting edge, that is, in the forming process, the spiral groove firstly processed on the base body is related to the cutting edge on the final spiral milling cutter, and the formed diamond powder layer is also convenient for directly forming the cutting edge, thereby solving the problem of great welding difficulty caused by welding diamond composite sheets on the cutter head of the spiral milling cutter in the prior art.

[0012] In order to achieve the above-mentioned purpose, the cutter head for the spiral milling cutter in the utility model adopts the following technical scheme:

[0013] A spiral milling cutter comprises a shank and a cutter head welded to the end of the shank, wherein the cutter head comprises a cylindrical base body, a spiral groove is provided on the outer periphery of the base body, the groove wall of the spiral groove is covered with diamond powder by sintering and fixing, and the edge of the spiral groove forms a cutting edge.

[0014] Furthermore, the spiral groove extends to both ends of the base body respectively.

[0015] Furthermore, there are at least two spiral grooves, and the plurality of spiral grooves are evenly arranged on the outer circumference of the base.

[0016] Furthermore, the cross section of the spiral groove is in the shape of an arc.

[0017] Furthermore, a reduced diameter section is provided on one end of the knife handle close to the knife head.

[0018] The beneficial effects of the utility model are as follows: the utility model improves the existing spiral milling cutter by arranging a cylindrical base on the cutter head and opening a spiral groove on the outer peripheral surface of the base, so as to facilitate the molding of the base into the shape of the cutter head and the cutter head of the spiral milling cutter; by sintering and fixing the diamond powder covered in the spiral groove, it is convenient to form a part with high structural strength and to facilitate molding into a cutting edge, that is, in the forming process, the spiral groove firstly processed on the base is related to the cutting edge on the final spiral milling cutter, and the formed diamond powder layer is also convenient for directly forming the cutting edge, thereby solving the problem of great welding difficulty caused by welding diamond composite sheets on the cutter head of the spiral milling cutter in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a cutter head for a spiral milling cutter in the utility model;

[0020] Figure 2 It is a structural schematic diagram of the spiral milling cutter in the utility model.

[0021] In the figure: 1, tool handle; 11, reduced diameter section; 2, tool head; 21, base; 22, spiral groove; 23, diamond powder layer. DETAILED DESCRIPTION

[0022] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0023] In the utility model, a spiral groove is provided on the base body, and diamond powder is evenly distributed in the spiral groove to form a diamond powder layer. That is to say, the diamond powder layer directly forms a spiral shape, which is close to the shape of the blade of the spiral milling cutter, thereby facilitating the formation of the spiral blade on the spiral milling cutter.

[0024] In the embodiment 1 of the cutter head for a spiral milling cutter (hereinafter referred to as the cutter head) of the utility model:

[0025] like Figure 1 As shown, the cutter head 2 includes a base 21 and a diamond powder layer 23, wherein the base 21 is cylindrical, a spiral groove 22 is provided on the periphery of the base 21 to form a groove area and a curved surface area on the periphery of the base 21, diamond powder is evenly distributed in the groove of the spiral groove 22 to form a diamond powder layer 23, the spiral groove 22 constitutes a chip groove, the curved surface area is a turning curved surface formed by turning, and the intersection of the turning curved surface and the spiral groove 22 forms a spiral blade, that is, the edge of the spiral groove 22 forms the blade of the spiral milling cutter. In addition, in order not to affect the cutting of the blade, the curved surface area is cut, and the curved surface area is cut to form a turning curved surface. At this time, the intersection of the spiral groove and the curved surface area is a blade, and a chip groove is formed inside the spiral groove.

[0026] In order to facilitate the formation of more blades and facilitate milling, at least two spiral grooves 22 are provided on the periphery of the base 21, and the spiral grooves 22 are evenly distributed on the periphery of the base 21, and the edge of each spiral groove 22 can form the blade of the spiral milling cutter. In the present embodiment, four spiral grooves 22 are provided. Of course, in other embodiments, the spiral grooves 22 can also be provided as three or two, or the spiral grooves 22 can be provided as other numbers not less than two. Of course, for other embodiments, the spiral groove 22 can also be provided as one. It is worth noting that the rotation direction and inclination angle of the plurality of spiral grooves 22 in the present embodiment are the same.

[0027] In this embodiment, both ends of the spiral groove 22 are extended to both ends of the base 21 respectively, that is, the base 21 is generally cylindrical, and the spiral groove 22 extends from the end surface of one end of the base 21 to the end surface of the other end, thereby ensuring a longer spiral groove 22.

[0028] In the embodiment 1 of the spiral milling cutter in the present utility model:

[0029] like Figure 2 As shown, the spiral milling cutter in this embodiment includes a handle 1 and a cutter head 2, wherein the handle 1 is a cylindrical alloy handle 1, and the handle 1 and the cutter head 2 are welded and fixed, that is, the cutter head 2 is first processed, and then the cutter head 2 and the handle 1 are welded and fixed, thereby forming a spiral milling cutter. It is worth noting that the structure of the cutter head 2 in this embodiment is the same as that of the cutter head 2 in Example 1, and will not be repeated here.

[0030] In addition, in order to better remove chips during milling, the chip removal groove needs to be as unobstructed as possible, so in this embodiment, a reduced diameter section 11 is provided on the end of the tool handle 1 close to the cutter head 2, thereby shortening the distance between the chip removal groove and the outer periphery of the tool handle 1, which facilitates chip removal. Of course, in other embodiments, the overall diameter of the tool handle 1 can be set smaller than the diameter of the base 21 of the cutter head 2, and the reduced diameter section 11 can be omitted in this case.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cutter head for a spiral milling cutter, comprising a cylindrical base, characterized in that: A spiral groove is provided on the outer periphery of the base body, the groove wall of the spiral groove is covered with diamond powder by sintering and fixing, and the edge of the spiral groove forms a cutting edge.

2. The cutter head for a spiral milling cutter according to claim 1, characterized in that: The spiral grooves extend to both ends of the base body respectively.

3. The cutter head for a spiral milling cutter according to claim 1 or 2, characterized in that: There are at least two spiral grooves, and the plurality of spiral grooves are evenly arranged on the outer circumference of the base.

4. The cutter head for a spiral milling cutter according to claim 1 or 2, characterized in that: The cross section of the spiral groove is in the shape of a circular arc.

5. A spiral milling cutter, comprising a shank and a cutter head welded to the end of the shank, the cutter head comprising a cylindrical base, characterized in that: A spiral groove is provided on the outer periphery of the base body, the groove wall of the spiral groove is covered with diamond powder by sintering and fixing, and the edge of the spiral groove forms a cutting edge.

6. The spiral milling cutter according to claim 5, characterized in that: The spiral grooves extend to both ends of the base body respectively.

7. The spiral milling cutter according to claim 5 or 6, characterized in that: There are at least two spiral grooves, and the plurality of spiral grooves are evenly arranged on the outer circumference of the base.

8. The spiral milling cutter according to claim 5 or 6, characterized in that: The cross section of the spiral groove is in the shape of a circular arc.

9. The spiral milling cutter according to claim 5 or 6, characterized in that: A reduced diameter section is arranged on one end of the knife handle close to the knife head.

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