Orifice facing cutter

Abstract

The utility model discloses an orifice facing cutter, which consists of a cutter body and a hard alloy blade at the front part of the cutter body, the front end part of the cutter body is provided with a guide post, and the tail part of the cutter body is provided with a Morse taper shank which is matched with a machine tool and is used for installation; the hard alloy cutter is characterized in that the number of the hard alloy blades is an odd number, the hard alloy blades are non-uniformly welded and distributed on the cutter body, and cutting edges and rear angles are ground on the hard alloy blades; compared with a traditional countersink, the countersink is simple in structure, long in service life, capable of improving the production quality and capable of effectively reducing the production cost.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, in particular to a hole spot facing tool. Background Art

[0002] At present, in the field of machining, welded countersinks are mostly used for countersinking of hole mouths in consideration of processing costs. The blades of traditional countersinks are all in even number (2, 4, 6, ...) and are evenly distributed. During the use of the countersink, two symmetrical blades cut at the same time, and the blades are subjected to relative forces, forming a relative thrust on the middle guide column. Due to the existence of the guide gap, the countersinking tool is prone to shaking, forming heavier chatter marks, resulting in poor countersinking roughness. For some workpieces, excessive chatter marks cannot meet their design requirements, causing problems such as false tightening of bolts. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the existing tools and provide a hole spot facing tool with unevenly distributed blades, mainly solving the problems of poor roughness of the existing spot facing and low tool life.

[0004] The technical solution provided by the utility model is: a hole spot facing tool, which consists of a tool body and a cemented carbide blade at the front of the tool body, a guide column is arranged at the front end of the tool body, and a Morse taper handle for installation matching with a machine tool is arranged at the rear of the tool body; the utility model is special in that the number of the cemented carbide blades is an odd number, and they are unevenly welded and distributed on the tool body.

[0005] Furthermore, the cutting edge and back angle of the cemented carbide blade are sharpened.

[0006] The beneficial effects of the utility model are as follows: 1. It adopts a unique alloy blade with an odd number and uneven distribution, so that the blades are not subjected to relative force, the countersinking tool is subjected to less force, the vibration is lighter, and it is not easy to form vibration marks, thereby increasing the service life of the tool and saving the labor of the operator, making the countersinking process smoother and improving the surface quality of the countersinked surface; 2. The hole countersinking tool with unevenly distributed blades can be used for the processing of hole countersinking of various specifications, the tool has high applicability, the tool life is increased, and the production cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a structural schematic diagram of the utility model;

[0008] Figure 2 It is a schematic diagram of the distribution of the three-edged blades of the utility model.

[0009] Among them, 1 is a cutter body, 2 is a carbide blade, and 3 is a guide column. DETAILED DESCRIPTION

[0010] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings.

[0011] like Figure 1 , 2 As shown, taking a three-blade spot facing tool as an example, a hole spot facing tool comprises a tool body 1, on which carbide blades 2 are welded unevenly, a guide column 3 is installed at the front end of the tool body 1, and the rear end of the tool body 1 has a Morse taper shank for installation matching with a machine tool; the number of carbide blades 2 is an odd number, i.e., 3, and they are welded unevenly on the tool body 1, and the carbide blades 2 have a sharpened cutting edge and a back angle δ; the three carbide blades 2 are distributed in a circle on the tool body 1, and the interval angles are α, β, and γ respectively, and the angle values ​​of α, β, and γ are not all equal to 120°.

[0012] It should be understood that the technical features not elaborated in this specification belong to the prior art. Although the implementation methods of the utility model patent are described above in conjunction with the drawings, the utility model is not limited to the above specific implementation methods, which are only illustrative and not restrictive. Ordinary technicians in this field can make more forms under the enlightenment of the utility model without departing from the scope of protection of the purpose of the utility model and the claims, which are all within the protection scope of the utility model.

Claims

1. A hole spot facing tool, comprising a tool body (1) and a carbide blade (2) at the front of the tool body, wherein the front end of the tool body (1) is provided with a guide column (3), and the rear end of the tool body (1) is provided with a Morse taper shank for mounting in cooperation with a machine tool; characterized in that: The number of the cemented carbide blades (2) is an odd number, and they are welded in an uneven manner and distributed on the blade body (1).

2. A hole spot facing tool according to claim 1, characterized in that: The cemented carbide blade (2) has a sharpened cutting edge and a ground back angle.

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