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Powder injection argon blowing pressure casting technology

A casting process and powder injection technology, applied in the field of die casting, to achieve the effect of fine grain, flexible operation and scientific conception

Inactive Publication Date: 2015-07-22
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The secondary pressure die casting is only suitable for the production of die castings with local thick walls

Method used

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  • Powder injection argon blowing pressure casting technology
  • Powder injection argon blowing pressure casting technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A powder injection and argon blowing die-casting process system is realized on a sample die-casting mold. figure 2 It is a top view of the moving mold direction after the die-casting mold is opened. The die-casting mold is matched with a 350-ton die-casting machine. One mold has four cavities. It is designed according to the national standard "Die-casting non-ferrous alloy samples (GB / T 13822-1992)". Two tensile A samples and one tensile B sample are die-cast at one time. , an impact toughness sample, so there are four cavities in a pair of die-casting molds, namely, two tensile sample A cavity 19, one tensile sample B cavity 20, and one impact toughness sample cavity twenty one. Among them, the mold material is H13 steel; it can be seen from the figure that the die-casting mold is basically the same as the ordinary high-pressure die-casting mold, so there is no need to make any changes to the mold during the powder injection and argon blowing process. The powder inj...

Embodiment 2

[0027] For aluminum alloy die-casting parts with a pouring weight of 1500 grams, such as 90cc and 100cc motorcycle engine crankcase molds, it is matched with a 650-ton die-casting machine, with one mold and one cavity. The mold material is H13 steel. The powder injection and argon blowing process can be like this Setting: The injection punch 13 advances under the action of the injection mechanism of the die-casting machine, gradually blocks the pouring port 12, and injects argon gas into the injection chamber 15 for 0.3 seconds. At this time, the air in the injection chamber 15 is driven out. Go, the injection punch 13 has not reached the powder injection argon blowing channel 11; then the powder in the powder storage cylinder 8 passes through the powder storage cylinder 8, the powder injection argon blowing channel 11, and the powder injection argon blowing controller 10 into the injection chamber 15 Within 0.2 seconds, the injection stops, and argon gas is introduced at the s...

Embodiment 3

[0029]For aluminum alloy die-casting parts with a pouring weight of 3000 grams, such as a crankcase mold for a small car engine, it is matched with a 1500-ton die-casting machine, with one mold and one cavity, and the mold material is H13 steel. The powder injection and argon blowing process can be set as follows: The injection punch 13 advances under the action of the injection mechanism of the die-casting machine, gradually blocks the pouring port 12, and injects argon gas into the injection chamber 15 for 0.5 seconds. At this time, the air in the injection chamber 15 is driven away, and the pressure The injection punch 13 does not reach the powder injection argon blowing channel 11; then the powder in the powder storage cylinder 8 passes through the powder storage cylinder 8, the powder injection argon blowing channel 11, and the powder injection argon blowing controller 10 into the injection chamber 15, and injects Stop after 0.3 seconds, and feed argon gas at the same time...

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Abstract

The invention relates to the field of pressure casting, in particular to a powder injection argon blowing pressure casting technology. According to the powder injection argon blowing pressure casting technology, a large number of non-spontaneous nucleation cores scattered and distributed can be formed through powder injection, and the nucleation conditions of a metal melt are changed; meanwhile, growing conditions of crystal nucleuses after the crystal nucleuses are formed are changed through the impact disturbance function of solid powder to dendritic crystals in the melt and strong relative movement between sold particles and the melt, and accordingly grains can be better refined. Argon blowing aims at protecting the alloy liquid against oxidization or hydrogen absorption in the turbulence or disturbance. The technology system is scientific in concept, the structure is convenient to achieve, operation is flexible, and the comprehensive mechanical performance of a die casting can be greatly improved while the technical parameters of the die casting are reasonably set.

Description

technical field [0001] The invention relates to the field of pressure casting, in particular to a powder injection argon blowing pressure casting process. Background technique [0002] Due to its light weight, high specific strength, good anti-electromagnetic interference performance, good shock absorption and recyclability, aluminum-magnesium alloys are widely used in hardware, household appliances, aerospace, rail transit, power electronics, automobiles and motorcycles, etc. . With the continuous development of the automobile industry and the deepening of its lightweight process, the market prospects of lightweight alloy parts represented by aluminum-magnesium alloys are becoming wider and wider. About 1 / 3 of aluminum-magnesium alloys are die castings, of which aluminum alloy die castings account for about 87% of the total output of die castings; zinc alloy die castings account for 11%; magnesium alloy die castings account for 2%; and magnesium alloys account for 90% of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D17/00B22D21/04B22D27/20
Inventor 胡心平孔维兵
Owner QILU UNIV OF TECH
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