Cutter for machining special contour surface of inner hole of part

Abstract

The utility model discloses a cutter for machining a special contour surface of an inner hole of a part, the cutter comprises a cutter base body and a locking nut hole, one end of the cutter base body is provided with a cutter bar installation clamping groove, and the other end of the cutter base body is provided with a boring blade and a special contour surface forming blade; and the locking nut hole is formed in the cutter base body. The boring cutter is simple in structure and more convenient to use, a traditional inner hole boring cutter and a special contour surface forming cutter are combined on the same cutter, and compared with an existing machining mode that two cutters are adopted for machining in sequence, machining steps are shortened, and machining efficiency is improved; meanwhile, the problems that the inner hole size is unstable and the consistency of special contour surfaces is poor due to the fact that the coaxiality of machining of two cutters is inconsistent are solved through machining of one cutter, and the stability and the consistency of the machining size of parts are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting tools, in particular to a cutting tool used for machining special contour surfaces of inner holes of parts. Background Art

[0002] In the manufacture of automotive parts, parts with special profile requirements on the inner hole need to be finished. Usually, two tools, an inner hole boring tool and a special profile surface forming tool, are used to finish the processing of such holes. However, this processing method requires the use of the above two tools in sequence to complete the processing of the special profile surface of the inner hole of the part. The two tools need to be switched during the processing, resulting in a lot of idle strokes of the tools and low processing efficiency. In addition, since the tools need to be replaced during the processing, the coaxiality of the two tools will be inconsistent, resulting in unstable inner hole size and poor consistency of the special profile surface. Utility Model Content

[0003] The technical problem solved by the utility model is to design a tool which can be used for machining special contour surfaces of inner holes of parts, so as to improve machining efficiency and machining quality.

[0004] In order to solve the above technical problems, a technical solution adopted by the utility model is: a tool for machining special contour surfaces of inner holes of parts, the tool comprising a tool base and a locking nut hole;

[0005] One end of the tool base is provided with a tool bar mounting slot, and the other end of the tool base is provided with a boring blade and a special contour surface forming blade;

[0006] The locking nut hole (6) is arranged on the tool base (2).

[0007] Preferably, the cutting edges of the boring blade and the special profile surface forming blade are on the same straight line passing through the center of the tool base.

[0008] Preferably, the special contour surface forming blade includes an inclined cutting edge and a "triangular" cutting edge located on the inclined cutting edge.

[0009] Preferably, the angle of the "triangular" cutting edge is 66°.

[0010] Preferably, the tool is made of cemented carbide.

[0011] The beneficial effects of the utility model are:

[0012] The utility model discloses a tool for machining special contour surfaces of inner holes of parts, which combines a traditional inner hole boring tool and a special contour surface forming tool. Compared with the existing machining method in which two tools are used for machining in sequence, the utility model eliminates the influence of inconsistent coaxiality of the two tools, which leads to unstable inner hole size and poor consistency of special contour surfaces, and improves the stability of machining size. At the same time, the method of machining with one tool improves machining efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of a tool for machining special contour surfaces of inner holes of parts according to the utility model;

[0014] Figure 2 This is a schematic diagram of a boring blade of a tool used for machining special contour surfaces of inner holes of parts in the utility model;

[0015] Figure 3 It is a schematic diagram of a special contour surface processing and forming blade in a tool used for processing a special contour surface of an inner hole of a part of the utility model;

[0016] Figure 4 It is a schematic diagram of another angle structure of a special contour surface machining forming blade in a tool used for machining special contour surface of inner hole of a part of the utility model;

[0017] Figure 5 It is a schematic diagram of the processing steps of the prior art processing method;

[0018] Figure 6 It is a schematic diagram of the processing steps of using a tool for processing a special contour surface of a part inner hole of the utility model;

[0019] The markings of the components in the accompanying drawings are as follows:

[0020] 1. Tool; 2. Tool body; 3. Boring blade; 4. Special contoured blade; 5. Tool bar mounting slot; 6. Locking nut hole. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0022] Example:

[0023] This embodiment introduces a tool for machining special contour surfaces of inner holes of parts.

[0024] Combined with Figure 1 , 2 As shown, Figure 1This is a schematic diagram of the structure of a tool for machining special contour surfaces of inner holes of parts in the utility model. Figure 2 This is a schematic diagram of a boring blade for a tool used for machining special contour surfaces of inner holes of parts. The tool 1 comprises a tool base 2 and a locking nut hole 6. One end of the tool base 2 is provided with a tool bar mounting slot 5. The other end of the tool base 2 is provided with a boring blade 3 and a special contour surface forming blade 4. The locking nut hole 6 is provided on the tool base 2. The tool base 2 is circular; the tool 1 is made of cemented carbide as a whole.

[0025] The cutting edges of the boring blade 3 and the special profile surface forming blade 4 are on the same straight line passing through the center of the tool base 2, which ensures that the two blades have the same center height and improves the stability and consistency of the processing size.

[0026] Combined with Figure 3 , 4 As shown, Figure 3 This is a schematic diagram of a special contour surface processing and forming blade in a tool used for processing special contour surfaces of inner holes of parts in the utility model. Figure 4 The utility model is a schematic diagram of another angle structure of a special contour surface processing forming blade in a tool for processing special contour surfaces of inner holes of parts. The special contour surface forming blade 4 includes an inclined cutting edge 41 and a "triangular" cutting edge 42 located on the inclined cutting edge 41.

[0027] Furthermore, the angle of the “triangular” cutting edge 42 is 66°.

[0028] In this embodiment, the existing processing method is compared with the tool introduced in this embodiment in terms of processing steps. Figure 5 , 6 As shown, Figure 5 It is a schematic diagram of the processing steps of the prior art processing method. Figure 6 The utility model is a schematic diagram of processing steps of a tool for processing a special contour surface of an inner hole of a part.

[0029] The existing processing method requires four steps of boring tool processing first, and then four steps of special contour surface forming tool processing. A total of eight steps are required to complete the processing of the inner hole parts with special contour surfaces. In this process, it is necessary to change the tool repeatedly to complete the processing of the parts. Due to frequent tool changes, the tool has many idle strokes, which leads to low processing efficiency. Moreover, the process of front and back tool changes will also make the coaxiality of the two tools inconsistent, which will lead to the problem of unstable inner hole size and poor consistency of special contour surface. By using the above-mentioned tool in this embodiment, the fine processing of the special contour surface can be achieved through only five steps. Compared with the existing processing process, three processing steps are reduced. A tool that combines the traditional inner hole boring tool and the special contour surface forming tool is used. There is no need to change the tool during the processing process. One tool eliminates the influence of inconsistent coaxiality of the two tools, ensures the stability of the processing size, and is more conducive to ensuring the consistency of the special contour surface. At the same time, there is no need to change the tool frequently, which greatly shortens the processing time and improves the processing efficiency.

[0030] The tool for machining special contour surfaces of parts described in this embodiment has a simple structure, and the inner hole boring tool and the special contour surface forming tool are centrally designed on the same tool base, and the same tool shaft is used for fine machining, which improves the stability of the machining size and the consistency of the contour surface.

[0031] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A tool for machining special contour surfaces of inner holes of parts, characterized in that: The tool (1) comprises a tool base (2) and a locking nut hole (6); One end of the tool base (2) is provided with a tool bar mounting slot (5), and the other end of the tool base (2) is provided with a boring blade (3) and a special contour surface forming blade (4); The locking nut hole (6) is arranged on the tool base (2).

2. A tool for machining special contour surfaces of inner holes of parts according to claim 1, characterized in that: The cutting edges of the boring blade (3) and the special profile surface forming blade (4) are on the same straight line passing through the center of the tool base (2).

3. A tool for machining special contour surfaces of inner holes of parts according to claim 1, characterized in that: The special contour surface forming blade (4) comprises an inclined cutting edge (41) and a "triangular" cutting edge (42) located on the inclined cutting edge.

4. A tool for machining special contour surfaces of inner holes of parts according to claim 3, characterized in that: The angle of the "triangular" cutting edge (42) is 66°.

5. A tool for machining special contour surfaces of inner holes of parts according to claim 1, characterized in that: The cutter (1) is made of hard alloy.

Images