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A fuel injector disassembly tool and its preparation material

A technology for dismantling tooling and fuel injection nozzles, applied in the field of metal materials, can solve problems such as impracticality and scratches on guide parts, and achieve the effects of ensuring integrity, increasing clamping area, and refining grains

Active Publication Date: 2020-08-04
CHENGXI SHIPYARD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Take the disassembly of the fuel injector of the B&W main engine as an example. Since the difference between the guide part of the fuel injector Φ32.4 and the sealing gear Φ34.5 is too small, and there is a chamfer of 1*45°, the two are separated by tapping with a conventional copper rod The method is no longer practical, and it is considered that the guide part will be scratched when the bench vise clamps the guide part and knocks it for disassembly.

Method used

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  • A fuel injector disassembly tool and its preparation material
  • A fuel injector disassembly tool and its preparation material
  • A fuel injector disassembly tool and its preparation material

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Effect test

Embodiment 1

[0040] A metal composite material for preparing fuel injector disassembly tooling, comprising outer layer copper alloy powder, middle layer hard iron alloy powder and inner layer copper alloy powder, which are formed by pressing and sintering under vacuum pressure; the outer layer and inner layer of copper The alloy powder is composed of 75% copper, 10% tungsten carbide, 1% cobalt and 4% nickel, 5% silicon dioxide, 3% iron tetroxide, and 2% graphene; the middle layer of hard iron alloy powder is made of 85 % iron, 2% manganese and 3% nickel, 3% titanium carbide, 2% carbon, 3% aluminum oxide, 2% chromium.

[0041] A method for preparing a tooling material for removing a fuel injector, comprising the following steps:

[0042] a. Preparation of raw materials:

[0043] Copper alloy powder of the outer layer and the inner layer: According to the copper alloy powder formula of the outer layer and the inner layer, the raw material and ethanol are put into the stirring ball mill acco...

Embodiment 2

[0051] A metal composite material for disassembling tooling for fuel injectors, comprising an outer layer of copper alloy powder, a middle layer of hard iron alloy powder, and an inner layer of copper alloy powder that are formed by pressing and sintering under vacuum pressure; the copper alloy of the outer layer and the inner layer The powder is composed of 79% copper, 8% tungsten carbide, 2% cobalt and 3% nickel, 4% silicon dioxide, 3% iron tetroxide, and 1% graphene; the middle layer of hard iron alloy powder is composed of 80% Iron, 6% manganese and 2% nickel, 3% titanium carbide, 4% carbon, 3% aluminum oxide, 2% chromium.

[0052] A method for preparing a tooling material for removing a fuel injector, comprising the following steps:

[0053] a. Preparation of raw materials:

[0054] Copper alloy powder of the outer layer and the inner layer: according to the copper alloy powder formula of the outer layer and the inner layer, the raw material and ethanol are put into the st...

Embodiment 3

[0062] A metal composite material for disassembling tooling for fuel injectors, comprising an outer layer of copper alloy powder, a middle layer of hard iron alloy powder, and an inner layer of copper alloy powder that are formed by pressing and sintering under vacuum pressure; the copper alloy of the outer layer and the inner layer The powder is composed of 80% copper, 10% tungsten carbide, 0.5% cobalt and 2.5% nickel, 2% silicon dioxide, 3% iron tetroxide, and 2% graphene; the middle layer of hard iron alloy powder is composed of 83% Iron, manganese and 3% nickel, 3% titanium carbide, 3% carbon, 3% aluminum oxide, 2% chromium.

[0063] A method for preparing a tooling material for removing a fuel injector, comprising the following steps:

[0064] a. Preparation of raw materials:

[0065] The copper alloy powder of the outer layer and the inner layer: According to the copper alloy powder formula of the outer layer and the inner layer, put the raw material and ethanol in the ...

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Abstract

The invention discloses an oil nozzle disassembly tool and a preparation material thereof. The preparation material of the oil nozzle disassembly tool comprises outer-layer copper alloy powder, middle-layer hard iron alloy powder and inner-layer copper alloy powder which are subjected to compression moulding and formed by vacuum pressure sintering; the outer-layer copper alloy powder and the inner-layer copper alloy powder mainly consist of mixed powder of 75-80% of copper, 5-10% of tungsten carbide, 2-5% of silicon dioxide, 2-3% of cobalt and 2-3% of nickel, 1-3% of ferroferric oxide and 1-2%of graphene; and the middle-layer hard iron alloy powder mainly consists of mixed powder of 80-85% of iron, 2-5% of manganese and 3-5% of nickel, 2-4% of carbon, 2-3% of titanium carbide, 1-3% of aluminum oxide and 1-2% of chromium. The invention provides a metal composite material suitable for the preparation of the disassembly tool. The metal composite material has excellent strength, good surface quality and good contact and magnetism.

Description

technical field [0001] The invention relates to the technical field of metal materials, and in particular relates to a fuel injector disassembly tool and its preparation materials. Background technique [0002] The fuel injector is a precision device with very high machining accuracy, which requires a large dynamic flow range, good anti-clogging and anti-pollution capabilities, and good atomization performance. Whether the fuel injector is normal is an important indicator of the working condition of the main engine. Usually, the fuel injectors replaced during maintenance must be maintained and tested in time, and used as spare parts. [0003] When testing, the three key elements to ensure the repair quality of fuel injectors are: [0004] 1. The seat surface of the needle valve and the nozzle body must achieve complete roundness; [0005] 2. The seat surface of the needle valve and the nozzle body should be completely consistent with the axis of the nozzle body; [0006] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00B25B27/02B22F3/04B22F3/10C22C1/05C22C9/00C22C33/08C22C37/08C22C37/10C22C1/10
CPCB22F3/04B22F3/1007B23P15/00B25B27/02C22C1/05C22C9/00C22C33/08C22C37/08C22C37/10
Inventor 刘京进徐小明曹锋
Owner CHENGXI SHIPYARD
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