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Method for manufacturing hollow sodium inflating valve with closed disc end

A manufacturing method and valve technology, which are applied to lift valves, mechanical equipment, valve devices, etc., can solve the problems of complicated processing procedures, small space in the bottom cavity, and small amount of sodium filling, so as to reduce welding defects, reduce manufacturing costs, and reduce costs. low effect

Active Publication Date: 2014-08-20
济南沃德汽车零部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have complicated processing procedures and small space in the bottom socket. Chinese patent application 201120224645.5 discloses a new type of hollow sodium-filled valve. The drilling method is to start drilling from the end face of the valve stem. The hole is closed from the end face of the valve stem; but the end of the hollow sodium-filled valve disc has no bottom socket, and the weight of the valve is heavy and the amount of sodium filled is small

Method used

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  • Method for manufacturing hollow sodium inflating valve with closed disc end
  • Method for manufacturing hollow sodium inflating valve with closed disc end
  • Method for manufacturing hollow sodium inflating valve with closed disc end

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1, a kind of manufacturing method of disk end airtight hollow sodium-filled valve is characterized in that: comprise the following steps: A. electric pier, will intercept slender bar stock 6 according to the rod portion diameter of valve finished product and gross weight, use The electric pier machine heats one end of the bar to about 1100±50°C, and at the same time is pushed by the cylinder to form a pre-blank with a spherical end, that is, a garlic shape.

[0026] B. Use the die forging equipment to forge the pre-blank into the shape of the valve blank. The center of the bottom plane of the upper mold 13 of the die forging equipment has an upper mold ball head 14, and the lower mold cavity 15 is consistent with the outer contour of the valve. The upper mold used is provided with a mold ball head, which can forge the valve bottom socket 19 in the disc end of the valve blank,

[0027] C. Use turning equipment to process three steps in the bottom socket of the...

Embodiment 2

[0034]Example 2, a disk-end-closed hollow sodium-filled valve manufactured by a method for manufacturing a disk-end-closed hollow sodium-filled valve. Including the valve stem and the valve disc, the center hole of the valve stem and the bottom pocket of the valve disc are filled with metal sodium, and there are three steps in the bottom pocket of the valve disc, from bottom to top are drilling platform steps, installation The sealing cover step, the end face of the valve disc and the groove formed by the sealing cover of the disc end face are surfacing welded with superalloy, and the surface of the valve stem and valve disc is provided with a chrome-plated layer or a nitride layer. For the disc cone surface, there is a superalloy layer or The thickness of nitrided layer, nitrided layer or chromium plating layer is 0.01mm, and the thickness of surfacing layer is 0.5mm.

[0035] The diameter of the drilling platform step is 1.5-1.7 times the diameter of the central hole of the ...

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Abstract

The invention discloses a method for manufacturing a hollow sodium inflating valve with a closed disc end, belongs to a production method of valves of internal combustion engines, and particularly relates to the method for manufacturing the hollow sodium inflating valve with sodium serving as a coolant. According to the method, a pre-workblank with the end shaped like the head of garlic of a bar is formed by the thin and long bar through an electric pier; then, the valve is forged and pressed into the shape of a gas outlet valve workblank through the one-time forging and pressing process in the forging procedure, wherein the valve workblank forming process is in a high temperature state, simple in process route, low in manufacturing cost and high in efficiency. An inner hole of the valve is machined through a deep hole gun-drill, and therefore the diameter of the inner hole, the depth of the inner hole, the roughness of the inner hole, the coaxiality of the inner hole and the evenness of the wall thickness can be ensured, the machining rhythm is quick, efficiency is high, and cost is low. By means of the method of utilizing steps at the welding point of a disc end face sealing cover and the valve, welding defects are reduced, and welding strength is high.

Description

technical field [0001] The invention belongs to a production method of an internal combustion engine valve, in particular to a production method of a hollow sodium-filled valve using sodium as a coolant. Background technique [0002] Usually, with the higher and higher requirements for automobile emissions in various countries, the requirements for engines of various automobile companies have also increased accordingly. What is shown in the valve products is that the weight of the valve is reduced and the working temperature of the valve is increased. Therefore, the valve is required to be Reduce weight and reduce the operating temperature of the valve itself. A new type of hollow sodium-filled valve has been popularized and applied in recent years. Scientists from various countries have proposed many technical solutions for hollow sodium-filled valves. GB595015 discloses a manufacturing method for hollow sodium-filled valves. This method uses a cylindrical blank Heating, e...

Claims

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Application Information

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IPC IPC(8): B23P15/00B21J5/02B21J5/08F01L3/14
CPCF01L3/14B21K1/22B23P15/001
Inventor 曲文强董兵聂元龙肖学林张杰陈雪萍
Owner 济南沃德汽车零部件有限公司
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