CN212217123U - Carbide ball cutter - Google Patents

Abstract

The utility model relates to a hard alloy ball cutter, which comprises a cutter handle and a cutter head located at one end of the cutter head. It is spherical, and the end of the spherical cutter head is evenly distributed with three arc-shaped end cutting edges extending to the side of the cutter head. The end cutting edge and the side cutting edge pass through the arc transition. There is an end chip flute between the adjacent end cutting edges, a side chip flute between the adjacent side cutting edges, and the side chip flute. The slot is composed of a first curved surface, a second curved surface and a third curved surface arranged in sequence. The helical cutting edge on the cutter head in the prior art is divided into two parts: an end cutting edge and a side cutting edge. The end cutting edge is an arc structure, and three are provided to ensure strength and not easy to be damaged; It is composed of three curved surfaces to avoid debris accumulation and improve cutting efficiency.

Description

Carbide ball cutter

technical field

The utility model relates to the technical field of cutting tools, in particular to a hard alloy ball cutter.

Background technique

The ball cutter is a commonly used tool in the cutting field, and the workpiece is processed by the cutting edge on its surface. Existing ball cutters are generally provided with a shank and a cutter head, and the cutter head is provided with a helical cutting edge, and the concave portion of the helical cutting edge forms a chip flute, which guides the chips cut out during the machining of the workpiece to the bottom. Discharge, thus preventing chips from affecting the cutting process.

At present, in the process of using the ball cutter, it is found that the cutting edge at the end is easily damaged, and only relying on the chip removal groove of the concave part to discharge debris, there will still be debris accumulation, which greatly reduces the cutting efficiency.

Utility model content

The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide a cemented carbide ball cutter.

The technical solution adopted by the utility model to solve the technical problem is: a carbide ball cutter, comprising a tool handle and a cutter head located at one end of the cutter handle, the front section of the cutter head is provided with a processing part, and the processing part includes The end cutting edge and the side cutting edge, the end of the cutter head is spherical, and three arc-shaped end cutting edges extending to the side of the cutter head are evenly distributed on the end of the spherical cutter head, and the three end cutting edges are respectively Connect three helical side cutting edges located on the side of the cutter head, the end cutting edge and the side cutting edge are transitioned through an arc, and there is an end chip flute between the adjacent end cutting edges, and the adjacent side cutting edges are cut. A side chip removal groove is arranged between the blades, and the side chip removal groove is composed of a first curved surface, a second curved surface and a third curved surface arranged in sequence.

In order to ensure the strength of the end cutting edge and the good chip removal effect of the end, it is further limited that the upper end of the end chip removal groove is sequentially provided with a first cut surface and a second cut surface.

Further defined, the helix angle of the side cutting edge is 40°. This setting can effectively reduce the cutting resistance of the side cutting edge and make the cutting more brisk.

In order to increase the strength of the end cutting edge, it is further defined that the surface of the end cutting edge is provided with a chromium nitride coating.

In order to meet cutting requirements and prevent knife breakage, it is further defined that the length of the cutter head is one third of the entire ball cutter.

Further defined, the length of the processing portion is half of the length of the cutter head.

The beneficial effect of the utility model is: the utility model divides the spiral cutting edge on the cutter head in the prior art into two parts: the end cutting edge and the side cutting edge, the end cutting edge is an arc structure, and three are arranged, Guaranteed strength, not easy to be damaged; the side chip flute is composed of the first curved surface, the second curved surface and the third curved surface arranged in sequence, avoiding the phenomenon of debris accumulation, and the cutting efficiency is greatly improved.

Description of drawings

The present utility model will be further described below with reference to the accompanying drawings and embodiments.

Figure 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic view of the structure of FIG. 1 along the A direction.

In the picture: 1. Shank, 2. Tool head, 3. End cutting edge, 4. Side cutting edge, 5. End chip flute, 6. Side flute, 51. First cut surface, 52. Second cut surface, 61. First surface, 62. Second surface, 63. Third surface.

Detailed ways

The present utility model will now be further described with reference to the accompanying drawings. These drawings are all simplified schematic diagrams and only illustrate the basic structure of the present invention in a schematic manner, so they only show the structures related to the present invention.

As shown in Figures 1 and 2, a cemented carbide ball cutter includes a handle 1 and a cutter head 2 at one end of the handle 1. The handle 1 is 100mm long, the cutter head 2 is 30mm long, and the front section of the cutter head 2 is provided with There is a processing part with a length of 15mm. The processing part includes an end cutting edge 3 and a side cutting edge 4. The end of the cutter head 2 is spherical. The end of the spherical cutter head 2 is evenly distributed with three extending to the cutter head 2 The arc-shaped end cutting edge 3 on the side, the three end cutting edges 3 are respectively connected to the three helical side cutting edges 4 located on the side of the cutter head 2, and the end cutting edge 3 and the side cutting edge 4 pass through the arc transition, An end chip flute 5 is provided between the adjacent end cutting edges 3, and a side chip flute 6 is provided between the adjacent side cutting edges 4. The side chip flute 6 is formed by a first curved surface 61 arranged in sequence , a second curved surface 62 and a third curved surface 63 , and the upper end of the end chip flute 5 is provided with a first cut surface 51 and a second cut surface 52 in sequence.

In this embodiment, the helix angle of the side cutting edge 6 is 40°, and the surface of the end cutting edge 3 is provided with a chromium nitride coating.

In addition, the outer diameter roundness of the tool holder 1 and the tool head 2 is controlled within 0.002mm, and the runout of each cutting edge relative to the tool holder 1 is within 0.01mm.

The cemented carbide ball cutter of this embodiment has a simple structure, strong practicability, high cutter life, improved production efficiency and reduced cost.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present utility model, and its purpose is to enable those who are familiar with the technology to understand the content of the present utility model and implement it, and cannot limit the scope of protection of the present utility model with this. Equivalent changes or modifications made in the spirit of the present invention shall be included within the protection scope of the present invention.

Claims (6)

1. The utility model provides a carbide ball sword, includes handle of a knife and the tool bit that is located handle of a knife one end, its characterized in that: the anterior segment of tool bit is equipped with the processing portion, the processing portion includes tip cutting edge and lateral part cutting edge, and the tip of tool bit is the sphere form, and evenly distributed has three arc end cutting edges that extend to the tool bit side on this sphere form tool bit tip, and three tip cutting edges connect three respectively and lie in the tool bit side and be spiral helicine lateral part cutting edge, and tip cutting edge passes through the circular arc transition with the lateral part cutting edge, are equipped with the tip chip groove between the adjacent tip cutting edge, are equipped with the lateral part chip groove between the adjacent lateral part cutting edge, the lateral part chip groove comprises the first curved surface, second curved surface and the third curved surface that set gradually.

2. The cemented carbide ballknife of claim 1, wherein: the upper end of the end chip groove is sequentially provided with a first tangent plane and a second tangent plane.

3. The cemented carbide ballknife of claim 1, wherein: the helix angle of the side cutting edge is 40 °.

4. The cemented carbide ballknife of claim 1, wherein: the surface of the end cutting edge is provided with a chromium nitride coating.

5. The cemented carbide ballknife of claim 1, wherein: the length of the cutter head is one third of the length of the whole ball cutter.

6. The cemented carbide ball cutter of claim 5, wherein: the length of the processing part is half of the length of the cutter head.

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