A type of end mill for stator blade machining that facilitates heat dissipation

Abstract

This utility model discloses a stator blade machining milling cutter with convenient heat dissipation, relating to the field of milling cutter technology. It includes a tool holder with a machining head fixed to its bottom end. The machining head has a cooling assembly inside, comprising an annular sleeve rotatably connected to the curved outer wall of the tool holder, with a connecting pipe on one side of the annular sleeve. This utility model utilizes coolant flowing in an annular groove to cool the machining head, extending its service life. Simultaneously, the coolant is sprayed out from a cooling groove at the rear end of the tool holder, further improving the cooling effect and reducing heat transfer between the tool holder and the machining head. This rapidly removes cutting heat, preventing dimensional deviations caused by softening or thermal deformation of the blade material due to high temperatures, thus improving the blade's profile accuracy. Furthermore, the coolant sprayed from the cooling groove can directionally flush away chips, preventing long chips from entangled in the machining head and reducing scratches on the blade surface during machining.

Description

Technical Field

[0001] This utility model relates to the field of milling cutter technology, specifically to a milling cutter for machining stator blades that facilitates heat dissipation. Background Technology

[0002] Stator blades are critical components of an engine, and their production requires milling cutters. Due to their unique shape, root milling cutters are used for machining. Also known as Christmas tree milling cutters, root milling cutters are complex forming tools specifically designed for machining the roots of turbine blades. Root milling has historically been a time-consuming process in turbine rotor manufacturing.

[0003] Existing technologies generate high temperatures when machining stator blades with milling cutters. Cooling is typically achieved by spraying coolant onto the contact surface between the milling cutter and the coolant. However, this method only cools the outer surface, and since heat is conductive, the internal temperature of the milling cutter remains high. This can lead to poor cooling and heat dissipation, causing the blade material to soften or deform due to high temperatures, resulting in dimensional deviations and reduced blade profile accuracy. Therefore, a milling cutter for stator blade machining that facilitates heat dissipation is proposed. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a stator blade machining milling cutter that facilitates heat dissipation, so as to solve the technical problems mentioned in the background.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a stator blade machining milling cutter that facilitates heat dissipation, including a tool holder, a machining head fixed at the bottom end of the tool holder, and a cooling assembly inside the machining head;

[0006] The cooling assembly includes an annular sleeve rotatably connected to the outer wall of the curved surface of the tool holder. A connecting pipe is provided on one side of the annular sleeve, and a slot is provided between the annular sleeve and the tool holder. A horizontal groove is provided inside the tool holder, and the two ends of the horizontal groove pass through the outer wall of the tool holder and are connected to the slot. A vertical groove extending into the interior of the machining head is provided at the bottom of the horizontal groove. An annular groove is provided on the outer wall of the vertical groove, and multiple diversion channels are arranged in a circular array at the lower end of the outer wall of the vertical groove. A cooling groove connected to the diversion channels is provided at the bottom of the machining head.

[0007] As a preferred technical solution, the bottom end of the processing head has a circumferential array of six sets of cutting blocks, and the six sets of cutting blocks are fixed to the processing head by bolts.

[0008] As a preferred technical solution, the outer wall of the processing head is provided with several sets of spiral grooves.

[0009] As a preferred technical solution, the end of the connecting pipe away from the annular sleeve is connected to an external coolant pipe.

[0010] As a preferred technical solution, a locking block is fixed to the inner wall of the annular sleeve, the locking block is rotatably connected to the knife handle, and a sealing gasket is provided at the connection end between the annular sleeve and the knife handle.

[0011] As a preferred technical solution, the cooling groove is formed on one side of the blade block.

[0012] In summary, the present invention has the following main advantages:

[0013] This invention utilizes a ring-shaped flow of coolant within an annular groove to cool the machining head, extending its service life. Furthermore, the coolant is sprayed from a cooling groove at the rear of the cutting tool, further enhancing the cooling effect and reducing heat transfer between the cutting tool and the machining head. This rapidly removes cutting heat, preventing dimensional deviations caused by softening or thermal deformation of the blade material at high temperatures, thus improving the blade's surface accuracy. Additionally, the coolant sprayed from the cooling groove directionally washes away chips, preventing long chips from entangled in the machining head and reducing scratches on the blade surface during machining. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall components of this utility model;

[0015] Figure 2 This is a schematic diagram of the blade block of this utility model;

[0016] Figure 3 This is a schematic diagram of the internal structure of the processing head of this utility model;

[0017] Figure 4 For the present utility model Figure 3 Enlarged view of point A in the middle;

[0018] Figure 5 This is a schematic diagram of the internal flow channel of the processing head of this utility model;

[0019] Figure 6 For the present utility model Figure 5 Enlarged view of section B in the middle.

[0020] In the diagram: 100, tool holder; 110, machining head; 111, spiral groove; 120, tool block;

[0021] 200, Cooling component; 210, Annular sleeve; 211, Empty slot; 212, Clamping block; 220, Connecting pipe; 230, Horizontal slot; 240, Vertical slot; 250, Annular slot; 260, Diverting slot; 270, Cooling slot. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] The embodiments of this utility model will be described below based on its overall structure.

[0024] A type of end mill for machining stator blades that facilitates heat dissipation, such as Figure 1-6 As shown, it includes a tool holder 100, a machining head 110 fixed at the bottom end of the tool holder 100, and a cooling assembly 200 inside the machining head 110;

[0025] The cooling assembly 200 includes an annular sleeve 210 rotatably connected to the curved outer wall of the tool holder 100. A connecting pipe 220 is provided on one side of the annular sleeve 210, and a slot 211 is provided between the annular sleeve 210 and the tool holder 100. A transverse groove 230 is provided inside the tool holder 100. The two ends of the transverse groove 230 pass through the outer wall of the tool holder 100 and are connected to the slot 211. A vertical groove 240 extending into the interior of the machining head 110 is provided at the bottom of the transverse groove 230. An annular groove 250 is provided on the outer wall of the vertical groove 240. Multiple diversion grooves 260 are arranged in a circular array at the lower end of the outer wall of the vertical groove 240. A cooling groove 270 connected to the diversion grooves 260 is provided at the bottom of the machining head 110.

[0026] When stator blades need to be shaped, a set of coolant pipes is connected to the connecting pipe 220. Then, the tool holder 100 drives the machining head 110 and the cutting block 120 to rotate at high speed to cut the blades. During machining, coolant enters the empty groove 211 inside the annular sleeve 210 through the connecting pipe 220, then enters the horizontal groove 230 from the empty groove 211, and then enters the vertical groove 240 from the horizontal groove 230. When the coolant passes through the vertical groove 240, some coolant enters the annular groove 250 and flows in a ring, effectively cooling the machining head 110 and extending its lifespan. The coolant has a service life of 10. Simultaneously, the coolant in the vertical groove 240 enters the multi-component flow channel 260, and then sprays out from the flow channel 260 into the cooling tank 270. By spraying the coolant at the rear end of the blade 120, the cooling effect is further improved, reducing heat transfer between the blade 120 and the machining head 110. This quickly removes cutting heat, preventing dimensional deviations caused by softening or thermal deformation of the blade material at high temperatures, thus further improving the blade's profile accuracy. Simultaneously, the coolant sprayed from the cooling tank 270 can directionally flush away chips, preventing long chips from entangled in the machining head 110 and reducing scratches on the blade surface during machining.

[0027] Please refer to this carefully. Figure 2The bottom of the machining head 110 has a circumferential array of six sets of cutting blocks 120, which are fixed to the machining head 110 by bolts.

[0028] By bolting the cutter block 120 to the machining head 110, it is easy for workers to quickly disassemble and replace it, avoiding the need to replace the entire end mill head when it is damaged, thus reducing costs.

[0029] Please refer to this carefully. Figure 1 The outer wall of the processing head 110 is provided with several sets of spiral grooves 111, and the end of the connecting pipe 220 away from the annular sleeve 210 is connected to the external coolant pipe.

[0030] By providing a spiral groove 111 on the outside of the machining head 110, the milling cutter can provide a continuous discharge channel when cutting chips, avoiding tool jamming and damage caused by chip accumulation.

[0031] Please refer to this carefully. Figures 2 to 6 The inner wall of the annular sleeve 210 is fixed with a locking block 212, which is rotatably connected to the tool holder 100. The connection end between the annular sleeve 210 and the tool holder 100 is provided with a sealing gasket, and the cooling groove 270 is opened on one side of the tool block 120.

[0032] The ring sleeve 210 and the locking block 212 work together to effectively engage with the tool holder 100, preventing the ring sleeve 210 from rotating synchronously when the tool holder 100 rotates.

[0033] In use, when machining stator blades, the coolant pipe is connected to the connecting pipe 220. The high-speed rotation of the cutting block 120 cuts the blades, and the coolant enters the annular groove 250 and flows in an annular pattern, effectively cooling the machining head 110 and extending its service life. At the same time, the coolant also enters the diversion groove 260 and is sprayed out from the cooling groove 270. The coolant sprays out from the rear end of the cutting block 120, which further improves the cooling effect and reduces the heat transfer between the cutting block 120 and the machining head 110, thereby quickly removing cutting heat and preventing the blade material from softening or deforming due to high temperature, which could lead to dimensional deviations. This further improves the surface accuracy of the blades. Meanwhile, the coolant sprayed from the cooling groove 270 can directionally flush away the chips, preventing long chips from wrapping around the machining head 110 and reducing scratches on the blade surface during machining. The parts of this device not mentioned are the same as or can be implemented using existing technology.

[0034] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A stator blade machining milling cutter with heat dissipation function, comprising a tool holder (100), characterized in that: The tool holder (100) is fixed to the bottom end with a processing head (110), and the processing head (110) is provided with a cooling assembly (200). The cooling assembly (200) includes an annular sleeve (210) rotatably connected to the curved outer wall of the tool holder (100). A connecting pipe (220) is provided on one side of the annular sleeve (210), and a slot (211) is provided between the annular sleeve (210) and the tool holder (100). A transverse groove (230) is provided inside the tool holder (100). The two ends of the transverse groove (230) pass through the outer wall of the tool holder (100) and are connected to the slot (211). A vertical groove (240) extending into the machining head (110) is provided at the bottom of the transverse groove (230). An annular groove (250) is provided on the outer wall of the vertical groove (240). A multi-group diversion groove (260) is arranged in a circular array at the lower end of the outer wall of the vertical groove (240). A cooling groove (270) connected to the diversion groove (260) is provided at the bottom of the machining head (110).

2. The stator blade machining milling cutter according to claim 1, characterized in that: The processing head (110) has six sets of cutting blocks (120) arranged in a circumferential array at its bottom end, and the six sets of cutting blocks (120) are fixed to the processing head (110) by bolts.

3. The stator blade machining milling cutter according to claim 1, characterized in that: The outer wall of the processing head (110) is provided with several sets of spiral grooves (111).

4. The stator blade machining milling cutter according to claim 1, characterized in that: The end of the connecting pipe (220) away from the annular sleeve (210) is connected to the external coolant pipe.

5. A stator blade machining milling cutter for easy heat dissipation according to claim 1, characterized in that: The inner wall of the annular sleeve (210) is fixed with a locking block (212), which is rotatably connected to the knife handle (100). The connection end between the annular sleeve (210) and the knife handle (100) is provided with a sealing gasket.

6. The stator blade machining milling cutter according to claim 1, characterized in that: The cooling groove (270) is located on one side of the blade block (120).

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