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Intake valve for automobile engine

An automotive engine and intake valve technology, applied in engine components, machines/engines, mechanical equipment, etc., can solve the problem of high cost of intake valves, easily control the solidification speed, ensure the solidification time, improve wear resistance and The effect of hardness

Active Publication Date: 2017-08-18
CHONGQING SANAIHAILING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the engine field valve, the head and the rod have different material performance requirements, the rod needs better wear resistance, and the head needs better mechanical properties and high temperature resistance, while the prior art single material production Intake valves are expensive and cannot meet the higher performance requirements of rapidly developing engines

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An intake valve for an automobile engine,

[0024] The intake valve manufacturing method includes the following steps: the intake valve includes a valve head and a valve stem, wherein the intake valve head is made of titanium alloy, and the intake valve stem is made of an iron-based alloy. First, an iron-based alloy rod with the same diameter is prepared. And titanium-based alloy rods, two rods are friction welded: firstly, at a speed of 1200rpm, a friction pressure of 20MPa, friction welding for 9s, and a friction feed rate of 0.6mm / s; then the speed is increased to 1900rpm, and the friction pressure is 75MPa. 15s, the friction feed rate is 0.4mm / s, then apply an upsetting pressure of 130MPa, hold the brake for 2 seconds, apply an upsetting pressure of 130MPa for another 8-s, and the upsetting deformation is 2.5mm, and the obtained welded rod The body is machined according to the size requirements of the intake valve head and rod to obtain the intake valve blank. The m...

Embodiment 2

[0032] An intake valve for an automobile engine,

[0033] The intake valve manufacturing method includes the following steps: the intake valve includes a valve head and a valve stem, wherein the intake valve head is made of titanium alloy, and the intake valve stem is made of an iron-based alloy. First, an iron-based alloy rod with the same diameter is prepared. And titanium-based alloy rods, two rods are friction welded: first, at a speed of 1220rpm, a friction pressure of 25MPa, friction welding for 10s, and a friction feed rate of 0.8mm / s; then the speed is increased to 1850rpm, friction pressure 80MPa, friction welding 12s, the friction feed rate is 0.5mm / s, then apply an upsetting pressure of 120MPa, hold the brake for 2 seconds, apply an upsetting pressure of 120MPa for another 9s, and the amount of upsetting deformation is 3mm, and the obtained welded rod body, according to The size of the intake valve head and stem requires machining and forming to obtain the intake va...

Embodiment 3

[0041] An intake valve for an automobile engine,

[0042] The intake valve manufacturing method includes the following steps: the intake valve includes a valve head and a valve stem, wherein the intake valve head is made of titanium alloy, and the intake valve stem is made of an iron-based alloy. First, an iron-based alloy rod with the same diameter is prepared. And titanium-based alloy rods, two rods are friction welded: first, at a speed of 1250rpm, a friction pressure of 24MPa, friction welding for 8s, and a friction feed rate of 0.7mm / s; then the speed is increased to 1880rpm, friction pressure 78MPa, friction welding 16s, the friction feed rate is 0.4mm / s, then apply an upsetting pressure of 125MPa, hold the brake for 2 seconds, apply an upsetting pressure of 125MPa for another 8s, and the amount of upsetting deformation is 3mm, and the obtained welded rod body, according to The size of the intake valve head and stem requires machining and forming to obtain the intake val...

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PUM

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Abstract

The invention discloses an intake valve for an automobile engine. An intake valve manufacturing method comprises the following steps that the intake valve comprises a valve head part and a valve rod part; the intake valve head part is made of a titanium alloy, and the intake valve rod part is made of an iron base alloy; and an iron base alloy bar and a titanium base alloy bar which are the same in diameter are prepared firstly. The two different alloys are adopted, the requirements for material properties of different parts of the intake valve are embodied, friction welding is adopted, and the whole process time is very short; but, the strength requirement for the rod part is met, and the requirement for high temperature resistance of the head part is met; and in the friction welding technology, the steps of top forging, braking and continuous top forging are sequentially conducted, and the solidification time of structures of welding openings is guaranteed.

Description

technical field [0001] The invention relates to an intake valve for an automobile engine, belonging to the technical field of automobile engines. Background technique [0002] The valve is one of the key parts of the engine, and it is a direct part used to open or close the intake and exhaust passages. The valves are divided into intake valves and exhaust valves. The air enters the engine cylinder through the intake valve and is mixed with fuel for combustion. The exhaust gas generated after combustion is discharged from the cylinder through the exhaust valve, so that fresh air enters the cylinder and burns to generate the driving force of the vehicle. Get rid of exhaust gas. In the engine field valve, the head and the rod have different material performance requirements, the rod needs better wear resistance, and the head needs better mechanical properties and high temperature resistance, while the prior art single material production Intake valves are expensive and cannot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L3/02B23K20/12
CPCB23K20/122F01L3/02F01L2301/00
Inventor 崔旺林
Owner CHONGQING SANAIHAILING IND
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