Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Casting method of oil pressure casting

A technology of casting and hydraulic pressure, which is applied in the field of casting of hydraulic castings

Active Publication Date: 2021-07-06
宁波拓铁机械有限公司
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present application aims at the above-mentioned deficiencies of the prior art, and provides a structure with fastening and high strength, which is not prone to defects such as sand drop, slag inclusion, and pores, and the structure of the hydraulic working surface of the obtained casting is smooth without casting defects and white spots. , which can meet the casting method of hydraulic castings used under high pressure conditions, without oil leakage and oil leakage

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Casting method of oil pressure casting
  • Casting method of oil pressure casting
  • Casting method of oil pressure casting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] (1) The raw material of following mass percentage is taken: 45% of pig iron, scrap steel 35%, return charge 20%, carburant: 1.0% of pig iron, scrap steel, return charge total amount;

[0069] (2) Put all the pig iron, steel scrap and returned charge into the smelting furnace, and then add the recarburizer with a total amount of 1.0% of the above formula; heat to melt the charge, and add FeSi75-C ferrosilicon and ferrosilicon after the charge is melted The amount of added iron is 0.8% of the total mass of pig iron, scrap steel and returned materials to obtain the original molten iron, and the original molten iron is continued to be heated to 1490 °C; the composition and mass percentage of the obtained original molten iron are C 3.58%, Si 1.45% , Mn 0.20%, P 0.025%, S 0.019%, and the rest is iron;

[0070] (3) Spheroidization: The spheroidization is carried out by the flushing method. The spheroidizing agent on one side of the spheroidizing bag is first added and compacte...

Embodiment 2

[0083] (1) The raw materials of the following mass percentages are taken by weighing: 50% of pig iron, 35% of steel scrap, 15% of recycled material, recarburizer: 1.1% of the total amount of pig iron, scrap steel, and recycled material;

[0084] (2) Put all the pig iron, scrap steel, and returned charge into the smelting furnace, and then add a carburant with a total formula of 1.1%; heat to melt the charge, and add FeSi75-C ferrosilicon and ferrosilicon after the charge is melted The amount of addition is 1.0% of the total mass of pig iron, scrap steel and recycled materials to obtain the original molten iron, and the original molten iron is continued to be heated to 1480 ° C; the composition and mass percentage of the obtained original molten iron are C 3.60%, Si 1.50%, Mn 0.18%, P 0.021%, S 0.018%, the rest is iron;

[0085] (3) The spheroidization is carried out by the flushing method. The spheroidizing dam on the side of the spheroidizing bag is firstly added with a spher...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
depthaaaaaaaaaa
thicknessaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a casting method of an oil pressure casting. The casting method of the oil pressure casting comprises the steps that sand mold manufacturing is conducted, iron liquid preparation is conducted, specifically, raw materials including, by mass, 45%-50% of pig iron, 30%-35% of scrap steel and 15%-25% of foundry returns are weighed; then a carburant which accounts for 0.7%-1.1% of the total amount of the pig iron, the scrap steel and the foundry returns is added; spheroidizing and inoculating are conducted, spheroidized iron liquid is slagged off and stood, and the iron liquid is poured into a casting system of the oil pressure casting in the step (1) when the temperature is reduced to 1370 DEG C-1400 DEG C so as to form a casting; metal-stream inoculation is carried out by using inoculation powder while pouring is carried out, and the addition amount of the inoculation powder is 0.08%-0.10% of the total mass of the raw iron liquid; and after the casting is cooled, the nodular cast iron oil pressure casting is obtained. The casting method of the oil pressure casting has the advantages that the structure is firm, the strength is high, the defects of sand falling, slag inclusion, air holes and the like are not prone to occurring, the oil pressure working face structure of the obtained casting is smooth and free of casting defects and white openings, and the method can be used under the high-pressure condition and is free of oil leakage and oil seepage.

Description

technical field [0001] The invention relates to the technical field of casting, in particular to a casting method of hydraulic castings. Background technique [0002] my country is a big country in the production and export of injection molding machines. As the development direction of precision injection molding machines, high-precision large-scale two-platen injection molding machines are highly valued by injection molding machine manufacturers. The development of a hydraulic system with high response speed, high precision and low overshoot is an urgent problem to be solved at present. The hydraulic control system is one of the core technologies of the injection molding machine, which directly determines the performance of the injection molding machine. The front plate of the injection molding machine, the front plate of the injection platform, and the gland, as the key components to ensure the reliable locking of the mold and the injection, directly affect the molding qu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/02B22C9/08B22C9/10B22C9/22C22C33/10C22C37/04C22C37/10
CPCB22C9/02B22C9/082B22C9/086B22C9/106B22C9/22C22C33/10C22C37/04C22C37/10
Inventor 宋贤发项铮宇吴超徐莉雄周宁张亚敏詹善国
Owner 宁波拓铁机械有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com