GREEN BODY AND CUTTING TOOL HAVING HELICAL SUPERHARD-MATERIAL RAKE FACE

Abstract

A green body is provided. The green body is made of a superhard material, is used for being fixed on a matrix so as to be machined into a cutting edge part of a cutter. The green body includes a first side surface and a second side surface. Both the first side surface and the second side surface twist at a set helical angle. After being fixed to the matrix, the green body is machined into an edge part for cutting, such as a main cutting edge and a center cutting edge located on the green body made of a same superhard material. The green body is applied to machining the cutting edge of the cutter. A rotating center has a continuous and intact center cutting edge formed by a superhard material.

Claims

1. A blank for manufacturing a cutter, wherein the blank comprises a main body, one end of the main body is machined into a cutting part, and the cutting part comprises a helical slot body crossing in a radial direction; and a green body is assembled with the slot body and is fixed via welding or bonding; the green body, made of a superhard material, wherein the green body is capable of being machined into a cutting edge part of a cutter, the green body comprising a first side surface and a second side surface both twisting at a set helix angle; the edge part comprises a main cutting edge and a center cutting edge located on the green body made of a same superhard material; and the green body is platy, and has a thickness greater than 0.3 mm and less than or equal to 4 mm, a length greater than 4 mm and less than or equal to 20 mm, and a width greater than 4 mm and less than or equal to 20 mm.

2. The blank for manufacturing the cutter according to claim 1, further comprising a third surface intersected with the first side surface and the second side surface, located at a first end in a feeding direction of the cutter, and made of the same superhard material.

3. The blank for manufacturing the cutter according to claim 2, wherein the third surface is a plane, a curved surface, or a folding surface.

4. (canceled)

5. The blank for manufacturing the cutter according to claim 1, wherein the green body is platy, and has the thickness greater than 0.3 mm and less than or equal to 2 mm, the length greater than 4 mm and less than or equal to 16 mm, and the width less than or equal to 4 mm.

6. A cutting tool, comprising: a platy green body, made of a superhard material and comprising a first plate surface and a second plate surface, the first plate surface at least comprising a first helical surface, and the second plate surface at least comprising a second helical surface; and a matrix, comprising a main body and a longitudinal axis, the main body rotating around the longitudinal axis, one end of the main body being set into a handle part capable of being mounted on rotary machinery, an other end being machined into a cutting part for implementing cutting machining, and the cutting part comprising a helical slot body crossing in a radial direction, wherein the green body and the slot body are assembled, and a center cutting edge close to the longitudinal axis and having a rake face and a flank face, and a main cutting edge having a rake face and a flank face are then machined and formed on the green body; a main cutting edge is made of a continuous and intact superhard material, and has a helical rake face; and a center cutting edge is made of a same intact superhard material and crosses a rotating center; and the green body is platy, and has a thickness greater than 0.3 mm and less than or equal to 4 mm, a length greater than 4 mm and less than or equal to 20 mm, and a width greater than 4 mm and less than or equal to 20 mm.

7. The cutting tool according to claim 6, wherein the green body is obtained by using a machine tool having a rotating shaft to cut the superhard material.

8. The cutting tool according to claim 6, wherein the first helical surface and the second helical surface of the green body are generally parallel to each other, and the helical surfaces are obtained by plane torsion.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG. 1 is a schematic diagram of an embodiment of a green body of the present invention;

[0036] FIG. 2 is a schematic diagram of an angle of the green body shown in FIG. 1;

[0037] FIG. 3 is a schematic diagram of another angle of the green body shown in FIG. 1;

[0038] FIG. 4 is a schematic diagram of another embodiment of a green body of the present invention;

[0039] FIG. 5 is a schematic diagram of an angle of the green body shown in FIG. 4;

[0040] FIG. 6 is a schematic diagram of another angle of the green body shown in FIG. 4;

[0041] FIG. 7 is a schematic diagram of an embodiment of a green body of the present invention;

[0042] FIG. 8 is a schematic diagram of an angle of the green body shown in FIG. 7;

[0043] FIG. 9 is a schematic diagram of another angle of the green body shown in FIG. 7;

[0044] FIG. 10 is a schematic diagram of an embodiment of a matrix of a cutter of the present invention;

[0045] FIG. 11 is a schematic diagram of an embodiment of a cutter of the present invention;

[0046] FIG. 12 is a schematic diagram of another embodiment of a cutter of the present invention; and

[0047] FIG. 13 is a schematic diagram of another embodiment of a cutter of the present invention.

DETAILED DESCRIPTION

[0048] The technical solution of the present invention is described below in detail with reference to the accompanying drawings. The embodiments of the present invention are merely illustrative of the technical solution of the present invention and are not limiting. Although the present invention is described in detail with reference to the preferred embodiments, it should be understood that those of ordinary skill in the art can make modifications or equivalent replacements to the technical solutions of the present invention without departing from the spirit and scope of the technical solution of the present invention. These modifications and equivalent replacements shall fall within the scope of claims of the present invention.

[0049] FIG. 1 is a schematic diagram of an embodiment of a green body of a cutter of the present invention. FIG. 2 is a schematic diagram of an angle of the green body shown in FIG. 1. FIG. 3 is a schematic diagram of another angle of the green body shown in FIG. 1. As shown in FIG. 1, FIG. 2, and FIG. 3, a machine tool having a rotating shaft is used for cutting a superhard material to obtain a green body 100. The green body is overall platy, including a first side surface (or referred to as a plate surface) 110 and a second side surface (or referred to as a plate surface) 120, and both of them twist at a set helix angle. Specifically, a helical cutting method for feeding a cutter from a side surface for cutting and rotating a composite sheet while cutting, instead of a method for clamping a superhard-material composite sheet, is used for obtaining a green body having a helical side surface.

[0050] The green body further includes a plane 130 having a planar shape and intersected with the first side surface 110 and the second side surface 120. Similarly, the third plane 130 may also use a curved surface or a folding surface, as shown in FIG. 4, FIG. 5, FIG. 6, FIG. 7, FIG. 8, and FIG. 9, for example, so as to facilitate the subsequent application in machining of a cutting edge. In this embodiment, the platy body has a thickness greater than 0.3 mm and less than or equal to 4 mm, a length greater than 4 mm and less than or equal to 20 mm, and a width greater than 4 mm and less than or equal to 20 mm.

[0051] FIG. 10 is a schematic diagram of an embodiment of a matrix of a cutter of the present invention. As shown in FIG. 10, a matrix 200 includes a main body 210 and a longitudinal axis 220. The main body 210 rotates around the longitudinal axis 220. One end of the main body 210 is capable of being mounted on a handle part 211 on rotary machinery. An other end of the main body is configured to be machined into a cutting part 212 for implementing cutting machining. The cutting part 212 includes a helical slot body 230 crossing in a radial direction. Referring to FIG. 1, FIG. 2, FIG. 3, and FIG. 10, as shown in FIG. 11, the green body 100 and the slot body 230 are assembled, and are fixed via welding or bonding to obtain a blank used for manufacturing a cutter. A center cutting edge 310 close to the longitudinal axis and having a rake face and a flank face, and a main cutting edge 320 having a rake face and a flank face are then machined and formed on the green body 100. The main cutting edge 320 is made of a continuous and intact superhard material, and has a helical rake face (such as greater than 15°). The center cutting edge 310 is made of the same intact superhard material and crosses a rotating center.

[0052] FIG. 12 is a schematic diagram of another embodiment of a cutter of the present invention. FIG. 13 is a schematic diagram of another embodiment of a cutter of the present invention. With reference to FIG. 4, FIG. 5, FIG. 6, FIG. 7, FIG. 8, and FIG. 9, as shown in FIG. 12 and FIG. 13, the form of the third surface of the green body 100 is changed, but is not limited to, for example, a curved surface or a folding surface. Cutters in various forms can be machined on demand, such as a ball-end cutter.