Cutter for machining inner hole arc

Abstract

The invention provides an inner hole arc machining tool which comprises a tool body and a cooling liquid hole formed in the tool body, the length direction of the cooling liquid hole is the same as that of the tool body, a connecting column is arranged at one end of the tool body, a tool bit is arranged at the other end of the tool body, one end of the tool bit is arranged on the tool body, and the other end of the tool bit is arranged on the tool body. The other end extends out of the cutter body; the tool bit corresponds to one side of the tool body, a plane portion is arranged on one side, facing the middle of the tool body, of the tool bit, a fillet portion and a blade corner portion are sequentially arranged on the other side of the tool bit, and the blade corner portion corresponds to one end, extending out of the tool body, of the tool bit. The cutter for machining the inner hole arc has the advantages of being simple and rapid in clamping, high in structural strength, good in machining effect and low in cutter manufacturing cost, can be suitable for machining the inner hole arc, can effectively solve the machining problem of related sizes in a deep hole, and is beneficial to improving the machining efficiency of the inner hole arc.

Description

Technical Field

[0001] The invention belongs to the technical field of machining, and in particular relates to a tool for machining inner hole arcs. Background Art

[0002] The wall thickness of the injector hole of the diesel engine cylinder head is relatively thin, and the shape of the position is relatively complex. The cavity of the injector installation hole needs to be processed, and the final processing size and the upper and lower rounded corners need to be guaranteed to meet the installation requirements of the injector and the formation of the water cavity structure. Since the injection hole is bottle-shaped, the diameter of the processing position is larger than the diameter of the hole position, and it is necessary to use a common milling cutter for rough processing first, and then use a ball milling cutter for interpolation milling, which has the problems of high processing cost and low processing efficiency. Summary of the invention

[0003] In view of this, the present invention aims to provide a tool for inner hole arc processing to solve the problem of low processing efficiency of existing processing tools.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A tool for inner hole arc processing comprises a tool body and a coolant hole arranged on the tool body, wherein the length direction of the coolant hole is the same as the length direction of the tool body, a connecting column is arranged at one end of the tool body, and a cutter head is arranged at the other end, wherein one end of the cutter head is arranged on the tool body, and the other end extends out of the tool body; the cutter head is arranged corresponding to one side of the tool body, a plane portion is arranged on the side of the cutter head facing the middle of the tool body, and a fillet portion and a cutting edge portion are arranged in sequence on the other side, wherein the cutting edge portion is arranged corresponding to one end of the cutter head extending out of the tool body, one end of the cutting edge portion is connected to the plane portion to form a cutting edge corner, and the other end is connected to the fillet portion, and one end of the fillet portion is connected to the cutting edge portion, and the other end is connected to the plane portion.

[0006] Furthermore, a cutting arc is provided at one end of the blade corner portion extending out of the tool body.

[0007] Furthermore, the blade corner portion and the rounded corner portion are connected via a chamfered portion, an end of the chamfered portion that is inclined upward is connected to the rounded corner portion, and an end that is inclined downward is connected to a cutting arc of the blade corner portion.

[0008] Furthermore, a protrusion is provided in the middle of the tool body.

[0009] Furthermore, the raised portion is an annular structure, and the raised portion is coaxially arranged with the tool body.

[0010] Furthermore, the planar portion is provided with a drainage groove connected to the cooling liquid hole.

[0011] Furthermore, the cutting edge angle is 15°.

[0012] Furthermore, the connecting column is provided with a slot.

[0013] Compared with the prior art, the tool for inner hole arc processing described in the present invention has the following advantages:

[0014] The tool for inner hole circular arc processing described in the present invention has the advantages of simple and quick clamping, high structural strength, good processing effect, and low tool manufacturing cost. It can be suitable for the processing of inner hole circular arcs, can effectively solve the problem of related size processing in deep holes, and is beneficial to improving the processing efficiency of inner hole circular arcs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a structural schematic diagram of the inner hole arc processing position in a tool for inner hole arc processing according to an embodiment of the present invention;

[0017] Figure 2 It is a structural schematic diagram of a tool for inner hole arc machining according to an embodiment of the present invention;

[0018] Figure 3 for Figure 2 Schematic diagram of the structure at AA in the middle;

[0019] Figure 4 for Figure 2 Left view of

[0020] Figure 5 The present invention is a schematic structural diagram of a connecting column in a tool for inner hole arc machining according to an embodiment of the present invention.

[0021] Description of reference numerals:

[0022] 1. Tool body; 2. Connecting column; 3. Tool head; 4. Coolant hole; 5. Drain groove; 6. Raised part; 7. Cutting arc; 8. Blade corner; 9. Rounded corner; 10. Bevel part; 11. Slot; 12. Flat part. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0024] A tool for inner hole arc processing, such as Figures 1 to 5As shown, it includes a tool body 1 and a coolant hole 4 arranged on the tool body 1, the length direction of the coolant hole 4 is the same as the length direction of the tool body 1, one end of the tool body 1 is provided with a connecting column 2, and the other end is provided with a cutter head 3, one end of the cutter head 3 is arranged on the tool body 1, and the other end extends out of one side of the tool body 1 (that is, protrudes from the side of the tool body 1); the cutter head 3 is arranged corresponding to one side of the tool body 1, and the side of the cutter head 3 facing the middle of the tool body 1 is provided with a plane portion 12, and the other side is provided with a fillet portion 9 and a cutting edge portion 8 in sequence, the cutting edge portion 8 is arranged corresponding to the end of the cutter head 3 extending out of the tool body 1, one end of the cutting edge portion 8 is connected to the plane portion 12 to form a cutting edge angle, and the other end is connected to the fillet portion 9, one end of the fillet portion 9 is connected to the cutting edge portion 8, and the other end is connected to the plane portion 12.

[0025] For example, both the cutter head 3 and the cutter body 1 can be made of W18Cr4V, which is a tungsten high-speed steel with high hardness, red hardness and high temperature hardness. It has a wide heat treatment range and is not easy to overheat during quenching. It is not easy to oxidize and decarburize during the heat treatment process, and has good grinding performance. The hardness of this steel is maintained at HRC63-64 and HRC62-63 at 500°C and 600°C, respectively, and has good cutting performance for a large number of general processed materials.

[0026] In actual application, the plane portion 12, the rounded corner portion 9 and the edge corner portion 8 can form an ear-shaped structure on the tool body 1, which is convenient for eccentric feed processing, is beneficial to improving processing efficiency and processing accuracy, eliminating quality risks, and improving the reliability of diesel engine operation.

[0027] Preferably, a cutting arc 7 is provided at one end of the blade corner portion 8 extending out of the tool body 1. Exemplarily, the diameter of the cutting arc 7 can be adjusted according to the diameter of the inner hole arc. For example, if the diameter of the inner hole arc is 8 cm, the diameter of the cutting arc 7 can also be 8 cm. Those skilled in the art can also adjust the diameter of the cutting arc 7 according to actual conditions to meet processing needs.

[0028] Preferably, the corner portion 8 and the rounded corner portion 9 are connected by a chamfer 10, wherein one end of the chamfer 10 facing upward is connected to the rounded corner portion 9, and one end facing downward is connected to the cutting arc 7 of the corner portion 8. Exemplarily, the inclination angle of the chamfer 10 may be 5°. By connecting the rounded corner portion 9 and the corner portion 8 with the chamfer 10, it is beneficial to improve the overall structural strength of the cutter head 3 and facilitate the cutter head 3 to perform cutting.

[0029] Preferably, a raised portion 6 is provided in the middle of the tool body 1. Exemplarily, the raised portion 6 is an annular structure, and the raised portion 6 is coaxially arranged with the tool body 1. The raised portion 6 can play a good limiting role on the tool body 1, and facilitates the assembly of the tool body 1.

[0030] In actual application, a slot 11 is provided on the connecting column 2. The slot 11 is provided to facilitate the stable connection between the fixture and the connecting column 2, thereby improving the stability of the tool body on the machine tool.

[0031] Preferably, a drainage groove 5 connected to the coolant hole 4 is provided on the plane portion 12. By providing the drainage groove 5 on the plane portion 12, by supplying coolant to the coolant hole 4 during the processing, the coolant can flow out through the drainage groove 5, thereby cooling the processing part, which is beneficial to improving the processing accuracy of the inner hole arc.

[0032] Preferably, the angle of the cutting edge angle is 15°. By adopting a cutting edge angle of 15°, the cutting performance of the tool can be ensured.

[0033] In actual application, the connection area between the cutter head 3 and the tool body 1 can be half of the cross-sectional area of ​​the tool body. When the cross-sectional area of ​​the tool body 1 is circular, the cutter head 3 can only remove 90° of material so that the surface of the planar portion 12 is located in the radial direction of the tool body 1 to ensure the rigidity of the tool.

[0034] The specific processing method using this tool can refer to the following steps:

[0035] Step 101: First, use a common boring tool to perform rough machining on the machining position by circular interpolation and layering to obtain a rough-machined inner hole.

[0036] Step 102: Before use, install the tool on the tool holder and use a tool setting instrument to check the tool radius and edge corners.

[0037] Step 103, the tool is eccentrically moved into the processing position (i.e., rough processing of the inner hole) with the spindle fixed at an angle, and the spindle does not rotate at this time.

[0038] Step 104, when the tool enters the top processing part, the spindle rotates to start processing to ensure the top size, and then continues to extend into the bottom processing part and the spindle rotates to process to ensure the bottom size.

[0039] Step 106, repeat steps 103 to 104 to ensure the processing accuracy, until the processing accuracy meets the requirements and the processing is completed.

[0040] Step 105, after the processing is completed, the spindle is oriented, stops rotating, and eccentrically exits the processing position.

[0041] In actual application, by using the above-mentioned processing tools and processing methods, the processing problem of a type of bottle-shaped with circular arc cavity can be solved. The tool and processing method can meet the technical requirements of the cylinder head injector mounting hole. The processing efficiency is greatly improved while the processing accuracy is stable, and good results have been achieved.

[0042] The tool for inner hole circular arc processing described in the present invention has the advantages of simple and quick clamping, high structural strength, good processing effect, and low tool manufacturing cost. It can be suitable for the processing of inner hole circular arcs, can effectively solve the problem of related size processing in deep holes, and is beneficial to improving the processing efficiency of inner hole circular arcs.

[0043] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A tool for inner hole arc processing, characterized in that: The invention comprises a tool body (1) and a coolant hole (4) arranged on the tool body (1), wherein the length direction of the coolant hole (4) is the same as the length direction of the tool body (1), a connecting column (2) is arranged at one end of the tool body (1), and a cutter head (3) is arranged at the other end, wherein one end of the cutter head (3) is arranged on the tool body (1), and the other end protrudes out of the tool body (1); the cutter head (3) is arranged corresponding to one side of the tool body (1), a plane portion (12) is arranged on one side of the cutter head (3) facing the middle of the tool body (1), and a fillet portion and a cutting edge portion (8) are arranged on the other side, wherein the cutting edge portion (8) is arranged corresponding to one end of the cutter head (3) protruding out of the tool body (1), one end of the cutting edge portion (8) is connected to the plane portion (12) to form a cutting edge corner, and the other end is connected to the fillet portion (9), and one end of the fillet portion (9) is connected to the cutting edge portion (8), and the other end is connected to the plane portion (12).

2. The tool for inner hole arc machining according to claim 1, characterized in that: One end of the blade corner portion (8) extending out of the tool body (1) is provided with a cutting arc (7).

3. The tool for inner hole arc machining according to claim 2, characterized in that: The blade corner portion (8) and the rounded corner portion (9) are connected via a bevel portion (10); an upwardly slanting end of the bevel portion (10) is connected to the rounded corner portion (9), and a downwardly slanting end is connected to a cutting arc (7) of the blade corner portion (8).

4. The tool for inner hole arc machining according to claim 1, characterized in that: A raised portion (6) is provided in the middle of the tool body (1).

5. The tool for inner hole arc machining according to claim 4, characterized in that: The raised portion (6) is an annular structure, and the raised portion (6) is coaxially arranged with the tool body (1).

6. The tool for inner hole arc machining according to claim 1, characterized in that: The plane portion (12) is provided with a liquid drainage groove (5) which is in communication with the cooling liquid hole (4).

7. The tool for inner hole arc machining according to claim 1, characterized in that: The angle of the cutting edge angle is 15°.

8. The tool for inner hole arc machining according to claim 1, characterized in that: The connecting column (2) is provided with a slot (11).

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