Thread milling cutter easy to disassemble and assemble and used for machining aero-engine

Abstract

The utility model belongs to the technical field of machining cutters, particularly relates to a thread milling cutter easy to disassemble and assemble for machining an aero-engine, and provides the following scheme aiming at the problem that a cutter head of an existing thread milling cutter for the aero-engine is inconvenient to replace as required: the thread milling cutter comprises a cutter handle and a detachable cutter head assembly positioned above the cutter handle, a connecting assembly is arranged between the tool bit assembly and the tool handle and arranged at the bottom of the tool bit assembly. The connecting assembly comprises a supporting rod fixed to the bottom of the tool bit assembly, the supporting rod is sleeved with a liftable installation piece, a limiting plate with the diameter larger than that of the supporting rod is fixedly arranged below the installation piece, and a connecting screw hole is fixedly formed in the middle of the installation piece. The fixing screw is screwed into the connecting screw hole of the mounting piece, and then the tool bit assembly can be fixed, so that the tool bit assembly can be detached and separated, and different tool bit assemblies can be replaced according to needs.

Description

Technical Field

[0001] This utility model relates to a thread milling cutter, specifically an easy-to-disassemble thread milling cutter for aero-engine machining, belonging to the field of machining tool technology. Background Technology

[0002] As the heart of an aircraft, the aero engine requires extremely high manufacturing precision and quality. During the machining process, the thread end mill, as a key tool, has a crucial impact on the engine's manufacturing precision and performance.

[0003] In the prior art, such as the thread milling cutter disclosed in announcement number CN207479764U, there are integrally formed tool holder and tool bar, and a cutting head for cutting the workpiece located at the front end of the tool bar. The cutting head includes a first cutting edge, a second cutting edge, a third cutting edge, a fourth cutting edge and a fifth cutting edge. The tool holder, tool bar and cutting head are integrally formed structures, and the material of the tool holder, tool bar and cutting head is cemented carbide.

[0004] However, in actual use, for integrated tool holders, tool shanks and cutter heads, the cutter head is not convenient to replace as needed. Once the cutter head is damaged, the entire milling cutter becomes unusable, resulting in high operating costs. Utility Model Content

[0005] This invention addresses the problem that existing thread milling cutters for aero-engines are inconvenient to replace the cutting heads of tethered balls during storage or transport, which requires folding and unfolding the balls as needed. The invention provides an easy-to-disassemble thread milling cutter for aero-engine machining.

[0006] The present invention achieves the above objectives through the following technical solution: an easy-to-disassemble thread milling cutter for aero-engine machining, comprising a tool holder and a detachable cutter head assembly located above the tool holder, wherein a connecting component is provided between the cutter head assembly and the tool holder, and the connecting component is located at the bottom of the cutter head assembly;

[0007] The connecting assembly includes a support rod fixed to the bottom of the cutter head assembly, and a liftable mounting piece is sleeved on the outside of the support rod. A limiting plate with a diameter larger than that of the support rod is fixedly installed below the mounting piece, and a connecting screw hole is fixedly opened in the middle of the mounting piece.

[0008] A connector is fixedly installed on the top of the tool holder, and a fixing screw is threaded onto the surface of the connector.

[0009] As a further improvement of this utility model: the fixing screw passes through the plug-in base and the connecting screw hole for threaded connection, and the plug-in base is provided with a support plate inside, and the support plate has an installation groove inside that matches the shape of the mounting part.

[0010] As a further improvement of this utility model: a support spring is provided above the mounting component, and the support spring is sleeved on the outside of the support rod.

[0011] As a further improvement of this utility model, guide slide rods are also provided on the front and rear sides of the support rod, and the guide slide rods penetrate through the interior of the mounting component.

[0012] As a further embodiment of this utility model: the cutter head assembly includes a cutter head body fixed to the top of the support rod, and the upper and lower ends of the support spring are respectively fixed to the cutter head body and the mounting component.

[0013] As a further embodiment of this utility model: the surface of the cutter head body is provided with a threaded groove, and the surface of the threaded groove is provided with a chip removal groove. The inside of the chip removal groove is provided with a number of liquid outlet holes that are evenly distributed at equal intervals. The bottom of the cutter head body is provided with a liquid inlet hole.

[0014] As a further improvement of this utility model: an internal cooling hole is provided at the bottom of the handle, and two sets of liquid guiding grooves are connected above the internal cooling hole. A connecting pipe fixed on the support plate is provided at the end of the liquid guiding groove, and the connecting pipe passes through the inside of the liquid inlet groove hole.

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

[0016] By using the connecting components and fixing screws, the cutter head assembly can be fixed by screwing the fixing screws into the connecting screw holes of the mounting parts. This allows the cutter head assembly to be disassembled and separated, and different cutter head assemblies can be replaced as needed, reducing the cost of use.

[0017] The connecting pipe allows coolant to enter the cutter head body and exit through the outlet, thus cooling the cutter head body. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the tool holder and tool head assembly of this utility model when separated;

[0020] Figure 3 This is a half-sectional structural diagram of the knife handle of this utility model;

[0021] Figure 4 This utility model Figure 2 A magnified structural diagram of part A in the middle.

[0022] In the diagram: 1. Tool holder; 2. Tool head assembly; 201. Tool head body; 202. Chip removal groove; 203. Threaded groove; 204. Liquid outlet hole; 3. Connecting assembly; 301. Mounting component; 302. Guide slide rod; 303. Support spring; 304. Connecting screw hole; 305. Support rod; 306. Limiting plate; 307. Mounting groove; 308. Support plate; 4. Plug-in socket; 5. Fixing screw; 6. Connecting pipe; 7. Liquid guide groove; 8. Internal cooling hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0024] like Figures 1 to 4 As shown, an easy-to-disassemble thread milling cutter for machining aero-engines includes a tool holder 1 and a detachable cutter head assembly 2 located above the tool holder 1. A connecting component 3 is provided between the cutter head assembly 2 and the tool holder 1, and the connecting component 3 is located at the bottom of the cutter head assembly 2.

[0025] The connecting component 3 includes a support rod 305 fixed to the bottom of the cutter head assembly 2, and a liftable mounting part 301 is sleeved on the outside of the support rod 305. A limiting plate 306 with a diameter larger than the support rod 305 is fixedly provided below the mounting part 301, and a connecting screw hole 304 is fixedly opened in the middle of the mounting part 301.

[0026] A connector 4 is fixedly installed on the top of the tool holder 1, and a fixing screw 5 is threaded onto the surface of the connector 4. After the tool head assembly 2 is inserted into the connector 4, the fixing screw 5 is screwed into the connecting screw hole 304 of the mounting part 301 to fix the tool head assembly 2. This allows the tool head assembly 2 to be disassembled and separated, and different tool head assemblies 2 can be replaced as needed, reducing the cost of use. Example 2

[0027] In addition to all the technical features included in Embodiment 1, this embodiment also includes:

[0028] The fixing screw 5 passes through the plug-in base 4 and is threaded into the connecting screw hole 304. The plug-in base 4 is provided with a support plate 308. The support plate 308 has a mounting groove 307 that matches the shape of the mounting part 301. The mounting groove 307 on the support plate 308 allows the mounting part 301 to pass through the mounting groove 307 and enter the underside of the support plate 308. After rotating the mounting part 301, the mounting part 301 and the mounting groove 307 form a cross-shaped structure, which can prevent the mounting part 301 from falling out of the mounting groove 307.

[0029] A support spring 303 is provided above the mounting component 301, and the support spring 303 is sleeved on the outside of the support rod 305. The mounting component 301 slides on the support rod 305, and the support spring 303 can provide a certain adjustment space for the mounting component 301.

[0030] The support rod 305 is also provided with guide slide rods 302 on both the front and rear sides, and the guide slide rods 302 penetrate through the interior of the mounting part 301. The guide slide rods 302 can limit the movement direction of the mounting part 301, so that the mounting part 301 can only move in a straight line. Example 3

[0031] In addition to all the technical features included in Embodiment 1, this embodiment also includes:

[0032] The cutter head assembly 2 includes a cutter head body 201 fixed to the top of the support rod 305, and the upper and lower ends of the support spring 303 are respectively fixed to the cutter head body 201 and the mounting part 301. Since the support spring 303 is fixed to the cutter head body 201 and the mounting part 301, the distance between the mounting part 301 and the cutter head body 201 can be adjusted.

[0033] The cutter head body 201 has a threaded groove 203 on its surface, and a chip removal groove 202 is formed on the surface of the threaded groove 203. The chip removal groove 202 has several equally spaced and evenly distributed liquid outlet holes 204. The bottom of the cutter head body 201 has a liquid inlet hole. After the coolant enters through the liquid inlet hole, a connecting groove is formed between the liquid inlet hole and the liquid outlet hole 204, so that the coolant is discharged outward from the liquid outlet hole 204 to cool down the cutter head body 201.

[0034] The bottom of the tool holder 1 is provided with an internal cooling hole 8, and two sets of liquid guiding grooves 7 are connected above the internal cooling hole 8. The end of the liquid guiding groove 7 is provided with a connecting pipe 6 fixed on the support plate 308, and the connecting pipe 6 passes through the inside of the liquid inlet groove hole. The coolant enters the liquid guiding groove 7 from the inside of the internal cooling hole 8, and enters the liquid inlet groove hole through the connecting pipe 6 at the top of the liquid guiding groove 7, thereby realizing the cooling of the milling cutter. The internal cooling hole 8, the liquid inlet groove hole, the liquid guiding groove 7 and the liquid outlet hole 204 are all realized by the existing internal cooling hole machining method of drill bit, which will not affect the overall strength of the milling cutter. This is a common technical means in the industry and will not be described in detail here.

[0035] Working principle: When using this easy-to-disassemble thread milling cutter for aero-engine machining, after the cutter head assembly 2 is inserted into the connector 4, the mounting part 301 is aligned with the mounting groove 307. At this time, the top of the connecting pipe 6 abuts against the bottom of the cutter head body 201, and the support spring 303 is compressed inward. The mounting part 301 is located in the mounting groove 307 and passes through the mounting groove 307, entering below the support plate 308. Rotating the mounting part 301, the mounting part 301 and the mounting groove 307 form a cross-shaped structure. At this time, the connecting pipe 6 is matched with the position of the liquid inlet hole, and the connecting pipe 6 is inserted into the interior of the liquid inlet hole. This allows the top of the support plate 308 to abut against the bottom of the cutter head body 201. Then, the fixing screw 5 is screwed into the connecting screw hole 304 of the mounting part 301 to fix the cutter head assembly 2. This allows the cutter head assembly 2 to be disassembled and separated, and different cutter head assemblies 2 can be replaced as needed, reducing the cost of use. The coolant enters the liquid guide groove 7 from the inside of the internal cooling hole 8 and enters the liquid inlet groove hole through the connecting pipe 6 at the top of the liquid guide groove 7. Since a connecting groove is set between the liquid inlet groove hole and the liquid outlet hole 204, the coolant is discharged outward from the liquid outlet hole 204 to cool and reduce the temperature of the cutter head body 201.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An easy-to-disassemble thread milling cutter for machining aero-engines, characterized in that: It includes a handle (1) and a detachable blade assembly (2) located above the handle (1), wherein a connecting component (3) is provided between the blade assembly (2) and the handle (1), and the connecting component (3) is located at the bottom of the blade assembly (2); The connecting component (3) includes a support rod (305) fixed to the bottom of the cutter head assembly (2), and a liftable mounting component (301) is sleeved on the outside of the support rod (305). A limiting plate (306) with a diameter larger than that of the support rod (305) is fixedly provided below the mounting component (301), and a connecting screw hole (304) is fixedly opened in the middle of the mounting component (301). The top of the tool holder (1) is fixedly provided with a connector (4), and the surface of the connector (4) is threaded with a fixing screw (5).

2. The easily detachable thread milling cutter for aero-engine machining according to claim 1, characterized in that: The fixing screw (5) passes through the plug-in base (4) and is threadedly connected to the connecting screw hole (304). The plug-in base (4) is provided with a support plate (308). The support plate (308) has an installation groove (307) that matches the shape of the mounting part (301).

3. The easily detachable thread milling cutter for aero-engine machining according to claim 2, characterized in that: A support spring (303) is provided above the mounting component (301), and the support spring (303) is sleeved on the outside of the support rod (305).

4. The easy-to-disassemble thread milling cutter for aero-engine machining according to claim 3, characterized in that: The support rod (305) is also provided with guide slide rods (302) on both the front and rear sides, and the guide slide rods (302) penetrate through the interior of the mounting component (301).

5. The easily detachable thread milling cutter for aero-engine machining according to claim 4, characterized in that: The cutter head assembly (2) includes a cutter head body (201) fixed to the top of the support rod (305), and the upper and lower ends of the support spring (303) are respectively fixed to the cutter head body (201) and the mounting part (301).

6. The easily detachable thread milling cutter for aero-engine machining according to claim 5, characterized in that: The surface of the cutter head body (201) is provided with a threaded groove (203), and the surface of the threaded groove (203) is provided with a chip removal groove (202). The inside of the chip removal groove (202) is provided with a plurality of liquid outlet holes (204) evenly distributed at equal intervals. The bottom of the cutter head body (201) is provided with a liquid inlet groove hole.

7. The easy-to-disassemble thread milling cutter for aero-engine machining according to claim 6, characterized in that: The bottom of the handle (1) is provided with an internal cooling hole (8), and two sets of liquid guiding grooves (7) are connected above the internal cooling hole (8). The end of the liquid guiding groove (7) is provided with a connecting pipe (6) fixed on the support plate (308), and the connecting pipe (6) passes through the inside of the liquid inlet groove hole.

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