Hard alloy valve seat turning tool and application thereof

A technology of cemented carbide and solid carbide, which is applied in the direction of cutting tools for lathes, turning equipment, tool holder accessories, etc., can solve the problems of tool wear, low production efficiency, high cutting temperature, etc., and achieve the improvement of tool life , long service life and high processing efficiency

Active Publication Date: 2018-04-24
CAPITAL AEROSPACE MACHINERY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the limitation of processing tools (high-speed steel tools are currently used), the processing efficiency of the valve seat is low, and the finish and profile of the processed valve are not ideal, especially the valve seat of the cryogenic valve needs to be ground and delivered, which affects product reliability.
Take the nickel-based superalloy at the end of the superalloy as an example: the tool wear of the nickel-based superalloy is severe during cutting, the cutting temperature is high, the work hardening is serious, and the production efficiency is low. Most high-speed steel tools can hardly process the nickel-based superalloy.

Method used

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  • Hard alloy valve seat turning tool and application thereof
  • Hard alloy valve seat turning tool and application thereof
  • Hard alloy valve seat turning tool and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of cemented carbide valve seat turning tool material of the present invention adopts fine-grained cemented carbide, grain size≤0.5 μm; For example: material is T10MG (Germany TIGRA brand), and T10MG is that grain size is 0.5 μm, contains Fine-grained cemented carbide material with 10% cobalt content: the hardness is 92.5HRA, the bending strength is 3800N / mm2, and the strength is 512psi.

[0031] Described cemented carbide valve seat turning tool adopts solid carbide; The solid carbide valve seat turning tool can be repaired and reused.

[0032] Such as figure 1 and figure 2 As shown, the handle 1 has upper and lower planes, which are convenient for clamping; the rake edge 2 is parallel to the plane of the handle 1 to ensure that the cutting position of the tool is correct after the tool is clamped; the neck 3 is a slender rod, which is convenient for clamping. Deep hole processing with small hole diameter of valve seat. The rake angle of the turning tool is 5...

Embodiment 2

[0038] A kind of cemented carbide valve seat turning tool material of the present invention adopts fine-grained cemented carbide, and grain size≤0.5 μ m;

[0039] Described cemented carbide valve seat turning tool adopts solid carbide; The solid carbide valve seat turning tool can be repaired and reused.

[0040] Such as figure 1 and figure 2 As shown, the handle 1 has upper and lower planes, which are convenient for clamping; the rake edge 2 is parallel to the plane of the handle 1 to ensure that the cutting position of the tool is correct after the tool is clamped; the neck 3 is a slender rod, which is convenient for clamping. Deep hole processing with small hole diameter of valve seat. The rake angle of the turning tool is 6°, and the back angle of the turning tool is 11° along the profile.

[0041] The hard alloy valve seat turning tool of the present invention is coated with a coating, and the coating adopts a nanometer blue coating.

[0042]When described cemented c...

Embodiment 3

[0045] A kind of cemented carbide valve seat turning tool material of the present invention adopts fine-grained cemented carbide, and grain size≤0.5 μm;

[0046] Described cemented carbide valve seat turning tool adopts solid carbide; The solid carbide valve seat turning tool can be repaired and reused.

[0047] like figure 1 and figure 2 As shown, the handle 1 has upper and lower planes, which are convenient for clamping; the rake edge 2 is parallel to the plane of the handle 1 to ensure that the cutting position of the tool is correct after the tool is clamped; the neck 3 is a slender rod, which is convenient for clamping. Deep hole processing with small hole diameter of valve seat. The rake angle of the turning tool is 7°, and the back angle of the turning tool is 12° along the profile.

[0048] The hard alloy valve seat turning tool of the present invention is coated with a coating, and the coating adopts a nanometer blue coating.

[0049] When described cemented carb...

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Abstract

The invention provides a hard alloy valve seat turning tool. The hard alloy valve seat turning tool is made of a fine-granularity hard alloy, and the grain size is equal to or smaller than 0.5 [mu]m.The hard alloy valve seat turning tool is overall made of the hard alloy. A tool handle is provided with an upper plane and a lower plane, and clamping is convenient. A front corner cutting edge is inparallel with the planes of the tool handle, and it is ensured that after tool clamping is finished, the cutting position of the tool is correct. When a stainless steel valve seat is machined throughthe hard alloy valve seat turning tool, the cutting speed of the turning tool is 680-720 r / min, the linear speed is 14.5-20.5 m / min, and the feeding speed is 0.035-0.045 mm / r. When a high-temperaturealloy valve seat is machined through the hard alloy valve seat turning tool, the cutting speed of the turning tool is 280-320 r / min, the linear speed is 6.8-8.0 m / min, and the feeding speed is 0.025-0.035 mm / r. The hard alloy valve seat turning tool has the advantages of being high in hardness, good in abrasive resistance, high in machining efficiency, long in service life and the like.

Description

technical field [0001] The present invention relates to the processing of a kind of cemented carbide cutting tool, in particular to a kind of cemented carbide valve seat turning tool of aerospace engine valve and its application. Background technique [0002] In the manufacture of aerospace engines, most materials are difficult to process. Machining of difficult-to-machine materials has always been a key research topic in the metal cutting field. High-speed steel cutting tools have excellent strength and toughness, and high shock resistance; but the red hardness (the ability to maintain hardness at high cutting temperatures) is low, and the cutting temperature should not be too high. The valve is an extremely important batch product on the aerospace engine, and the valve seat is the key sealing structure of the valve, and its processing quality is crucial to the sealing performance of the product. At present, the valve seat materials of aerospace engines include aluminum, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B27/14
Inventor 孙亮郝丁魏强李曙光王海萍尉晓霞赵雄金盈池
Owner CAPITAL AEROSPACE MACHINERY
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