Prefabricated cutting knife with arc groove

Abstract

The prefabricated cutting knife comprises a knife handle and a knife head, the knife head is fixedly arranged on the knife handle, at least two arc grooves are evenly formed in the knife head, one side of each arc groove is connected with the cutting face side of the knife head through a first connecting face, and the other side of each arc groove is connected with the back face side of the knife head through a second connecting face. A first arc-shaped chamfer is arranged between the first connecting face and the side face of the tool bit, and a second arc-shaped chamfer is arranged between the second connecting face and the side face of the tool bit. The original blank bar needing to be manufactured is directly made into the prefabricated cutting knife, and then the required cutting knife is processed on the basis of the prefabricated cutting knife, so that the manufacturing cost can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated cutting knives, in particular to a prefabricated cutting knife with a circular arc groove. Background Art

[0002] In the prior art, the manufacturing process of cutting knives starts with blank bars. This processing method can manufacture any required cutting knives, but for cutting knives that need to be mass-produced, if the blank bars are continued to be used for production, the number of grinding times will need to be increased during the processing process, and the processing time of the cutting knives will be increased, which will ultimately lead to an increase in the processing time of the cutting knives. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and provide a prefabricated cutting knife with a circular arc groove.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A prefabricated cutting tool with an arc groove comprises a tool handle and a tool head, wherein the tool head is fixedly arranged on the tool handle and preformed, and at least two arc grooves are evenly arranged on the tool head, one side of the arc groove is connected to the cutting surface side of the tool head through a first connecting surface, and the other side of the arc groove is connected to the back side of the tool head through a second connecting surface, a first arc chamfer is arranged between the first connecting surface and the side surface of the tool head, and a second arc chamfer is arranged between the second connecting surface and the side surface of the tool head.

[0006] Furthermore, three arc grooves are evenly arranged on the cutter head.

[0007] Furthermore, the arc groove is a straight groove, and the first connecting surface and the second connecting surface are both planes.

[0008] Furthermore, a width of the first connecting surface is smaller than a width of the second connecting surface.

[0009] Furthermore, the first connecting surface and the second connecting surface are arranged perpendicular to each other.

[0010] Furthermore, the distance from the first connection surface to the axis of the tool head is 0.83-0.88 mm, and the distance from the second connection surface to the axis of the tool head is 1.7-1.75 mm.

[0011] Furthermore, the diameter of the tool head is 6.3-6.4 mm, and the radius of the arc groove is 0.4-0.6 mm.

[0012] Furthermore, the radius of the first arc-shaped chamfer is 0.1-0.2 mm, and the radius of the second arc-shaped chamfer is 0.1-0.3 mm.

[0013] Furthermore, the end of the knife handle is provided with a mounting groove that cooperates with the knife head.

[0014] Furthermore, the cross section of the knife handle is circular, and the knife head is coaxially arranged on the knife handle.

[0015] The beneficial effects of the utility model are:

[0016] 1) In this technology, the original blank bar material to be manufactured is directly made into a prefabricated cutting knife, and then the required cutting knife is processed based on the prefabricated cutting knife, which can effectively reduce the manufacturing cost.

[0017] 2) In the present technology, the arc groove, the first arc chamfer and the second arc chamfer are provided to make the cemented carbide powder have better fluidity, higher density and more uniform structure during the pressing process, and the solder has better fluidity during welding and is less likely to have holes, so that the welding strength is higher, the handle fixes the alloy more firmly and has better stability, the blade is not likely to resonate during use, and the processed workpiece is smoother, flatter and more beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional structural diagram of the prefabricated cutting knife;

[0019] Figure 2 This is a side view of the prefabricated cutting knife;

[0020] Figure 3 The structure diagram of the end of the cutter head;

[0021] In the figure, 1-tool handle, 2-tool head, 3-arc groove, 4-first connecting surface, 5-second connecting surface, 6-first arc chamfer, 7-second arc chamfer, 8-installation groove. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 3 , the utility model provides a technical solution:

[0024] A prefabricated cutting tool with an arc groove comprises a tool handle 1 and a tool head 2. The tool head 2 is fixedly arranged on the tool handle 1 and is preformed. At least two arc grooves 3 are evenly arranged on the tool head 2. One side of the arc groove 3 is connected to the cutting surface side of the tool head 2 through a first connecting surface 4, and the other side of the arc groove 3 is connected to the back side of the tool head 2 through a second connecting surface 5. A first arc chamfer 6 is arranged between the first connecting surface 4 and the side surface of the tool head 2, and a second arc chamfer 7 is arranged between the second connecting surface 5 and the side surface of the tool head 2. Among them, the prefabrication of the cutter head 2 is an existing technology, and the prefabrication includes extrusion molding, compression molding and casting molding. The cutter head 2 of this embodiment is molded by cemented carbide powder, and the arc groove 3, the first arc chamfer 6 and the second arc chamfer 7 are arranged so that the cemented carbide powder has better fluidity, higher density and more uniform structure during the pressing process. The solder has better fluidity during welding and is less likely to have holes, so that the welding strength is higher, the handle fixing alloy is more firm and the stability is better. The blade is not easy to resonate during use, and the processed workpiece is smoother, flatter and more beautiful.

[0025] In some embodiments, three arc grooves 3 are evenly arranged on the cutter head 2. The number of the arc grooves 3 is determined according to the number of blades on the cutter head 2. Two blades are provided with two arc grooves 3, three blades are provided with three arc grooves 3, four blades, five blades, etc. can also be provided.

[0026] In some embodiments, the arc groove 3 is a straight groove, and the first connecting surface 4 and the second connecting surface 5 are both planes. In this technology, the cutter head 2 needs to manufacture a straight tool, so the arc groove 3 is a straight groove, and the first connecting surface 4 and the second connecting surface 5 are both planes. If the cutter head 2 needs to manufacture a spiral cutter, the arc groove 3 uses a spiral groove, and the first connecting surface 4 and the second connecting surface 5 use a spiral surface.

[0027] In some embodiments, the width of the first connection surface 4 is smaller than the width of the second connection surface 5. Since the first connection surface 4 is connected to the cutting edge of the tool, the width of the first connection surface 4 is narrow, and the second connection surface 5 is the back of the cutting edge, so the width of the second connection surface 5 is wider.

[0028] In some embodiments, the first connection surface 4 and the second connection surface 5 are arranged perpendicular to each other. In general, the cutter head 2 is provided with three blades. In the finished cutter head, the angle between the first connection surface 4 and the second connection surface 5 is less than 90°, and the first connection surface 4 also needs to be inclined. In the present technology, the inclination angle of the first connection surface 4 is 20°.

[0029] In some embodiments, the distance from the first connection surface 4 to the axis of the cutter head 2 is 0.83-0.88 mm, and the distance from the second connection surface 5 to the axis of the cutter head 2 is 1.7-1.75 mm. Among them, the distance from the first connection surface 4 to the axis of the cutter head 2 is often 0.83 mm, 0.84 mm, 0.85 mm, 0.86 mm, 0.87 mm, and 0.88 mm, and the distance from the second connection surface 5 to the axis of the cutter head 2 is often 1.7 mm, 1.71 mm, 1.72 mm, 1.73 mm, 1.74 mm, and 1.75 mm.

[0030] In some embodiments, the diameter of the cutter head 2 is 6.3-6.4 mm, and the radius of the arc groove 3 is 0.4-0.6 mm. The diameter of the cutter head 2 is usually 6.3 mm, 6.35 mm, and 6.4 mm, and the radius of the arc groove 3 is usually 0.4 mm, 0.5 mm, and 0.6 mm.

[0031] In some embodiments, the radius of the first arc chamfer 6 is 0.1-0.2 mm, and the radius of the second arc chamfer 7 is 0.1-0.3 mm. The radius of the first arc chamfer 6 is usually 0.1 mm and 0.2 mm, and the radius of the second arc chamfer 7 is usually 0.1 mm, 0.2 mm, and 0.3 mm.

[0032] In some embodiments, the end of the knife handle 1 is provided with a mounting groove 8 that matches the cutter head 2. The cross section of the knife handle 1 is circular, and the cutter head 2 is coaxially arranged on the knife handle 1. After the cutter head 2 is inserted into the mounting groove 8, the knife handle 1 and the cutter head 2 are generally fixed together by welding, and the coaxiality between the knife handle 1 and the cutter head 2 is controlled within 0.05 mm.

[0033] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation", "hinge" 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 or an electrical connection; 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. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0035] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A prefabricated cutting knife with a circular arc groove, comprising a knife handle (1) and a knife head (2), wherein the knife head (2) is fixedly arranged on the knife handle (1), and the knife head (2) is prefabricated, characterized in that: At least two arc grooves (3) are evenly arranged on the cutter head (2); one side of the arc groove (3) is connected to the cutting surface side of the cutter head (2) via a first connecting surface (4); the other side of the arc groove (3) is connected to the back side of the cutter head (2) via a second connecting surface (5); a first arc chamfer (6) is arranged between the first connecting surface (4) and the side surface of the cutter head (2); and a second arc chamfer (7) is arranged between the second connecting surface (5) and the side surface of the cutter head (2).

2. A prefabricated cutting tool with a circular arc groove according to claim 1, characterized in that: The cutter head (2) is evenly provided with three circular arc grooves (3).

3. A prefabricated cutting tool with circular arc groove according to claim 1 or 2, characterized in that: The arc groove (3) is a straight groove, and the first connecting surface (4) and the second connecting surface (5) are both planes.

4. A prefabricated cutting tool with arc groove according to claim 3, characterized in that: The width of the first connecting surface (4) is smaller than the width of the second connecting surface (5).

5. The prefabricated cutting tool with circular arc groove according to claim 3, characterized in that: The first connecting surface (4) and the second connecting surface (5) are arranged perpendicular to each other.

6. The prefabricated cutting tool with arc groove according to claim 3, characterized in that: The distance from the first connecting surface (4) to the axis center line of the cutter head (2) is 0.83 to 0.88 mm, and the distance from the second connecting surface (5) to the axis center line of the cutter head (2) is 1.7 to 1.75 mm.

7. A prefabricated cutting tool with circular arc groove according to claim 1 or 2, characterized in that: The diameter of the cutter head (2) is 6.3-6.4 mm, and the radius of the arc groove (3) is 0.4-0.6 mm.

8. A prefabricated cutting tool with circular arc groove according to claim 1 or 2, characterized in that: The radius of the first circular arc chamfer (6) is 0.1-0.2 mm, and the radius of the second circular arc chamfer (7) is 0.1-0.3 mm.

9. A prefabricated cutting tool with arc groove according to claim 1 or 2, characterized in that: The end of the knife handle (1) is provided with a mounting groove (8) that matches the knife head (2).

10. A prefabricated cutting tool with arc groove according to claim 1 or 2, characterized in that: The cross section of the knife handle (1) is circular, and the knife head (2) is coaxially arranged on the knife handle (1).

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