Unlock instant, AI-driven research and patent intelligence for your innovation.

Production material and process for internal combustion engine cylinder body and cylinder cover with light weight and high thermal fatigue strength

A technology with high thermal fatigue and high strength, used in manufacturing tools, metal processing equipment, casting and molding equipment, etc., can solve the problems of heavy weight, high cost, low thermal fatigue strength, etc., and achieve reduced weight, good surface quality, and thermal fatigue. high intensity effect

Inactive Publication Date: 2014-12-17
SHANXI MOFAN MACHINERY MFG
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problems of heavy weight, low thermal fatigue strength and high cost in the internal combustion engine cylinder head, and provides a light weight and high thermal fatigue strength production material and process for the internal combustion engine cylinder head

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] A production process of an internal-combustion engine cylinder head with light weight and high thermal fatigue strength, which comprises the following process steps:

[0008] (1) Pre-expanding polystyrene beads, pre-expanding EPS beads under the conditions of air pressure of 0.4MPa, steam temperature of 85°C, and foaming density of 22g / L;

[0009] ⑵Mature the pre-released polystyrene beads, keep the area of ​​the curing warehouse ventilated, and the curing time is 4 hours;

[0010] ⑶White mold forming, preheat the mold to 50°C, keep mold clamping, feeding, and steam pressure at 0.4MPa, and control the time at 50s;

[0011] ⑷White mold drying, drying the white mold at a temperature of 50°C;

[0012] ⑸White mold combination, apply cold glue or hot melt glue to the parting surface of the model;

[0013] ⑹ Fill sand, fill the semi-closed channel cavity with coated sand;

[0014] ⑺ Brush the surface of the white mold with lost foam casting refractory coating, and the thic...

Embodiment 2

[0021] A production process of an internal-combustion engine cylinder head with light weight and high thermal fatigue strength, which comprises the following process steps:

[0022] (1) Pre-expanding polystyrene beads, pre-expanding EPS beads under the conditions of air pressure of 0.5MPa, steam temperature of 90°C, and foaming density of 23g / L;

[0023] ⑵Mature the pre-released polystyrene beads, keep the area of ​​the curing warehouse ventilated, and cure for 5 hours;

[0024] ⑶White mold forming, preheat the mold to 60°C, keep mold clamping, feeding, and steam pressure at 0.5MPa, and control the time at 60s;

[0025] ⑷Drying the white mold, drying the white mold at a temperature of 53°C;

[0026] ⑸White mold combination, apply cold glue or hot melt glue to the parting surface of the model;

[0027] ⑹ Fill sand, fill the semi-closed channel cavity with coated sand;

[0028] ⑺ Brush the surface of the white mold with lost foam casting refractory coating, and the thickness ...

Embodiment 3

[0035] A production process of an internal-combustion engine cylinder head with light weight and high thermal fatigue strength, which comprises the following process steps:

[0036] (1) Pre-expanding polystyrene beads, pre-expanding EPS beads under the conditions of air pressure of 0.6MPa, steam temperature of 100°C, and foaming density of 26g / L;

[0037] ⑵Mature the pre-released polystyrene beads, keep the area of ​​the curing warehouse ventilated, and the curing time is 6 hours;

[0038] ⑶ White mold forming, preheat the mold to 70°C, keep mold clamping, feeding, and steam pressure at 0.6MPa, and control the time at 70s;

[0039] (4) Drying of the white mold, drying the white mold at a temperature of 55°C;

[0040] ⑸White mold combination, apply cold glue or hot melt glue to the parting surface of the model;

[0041] ⑹ Fill sand, fill the semi-closed channel cavity with coated sand;

[0042] ⑺ Brush the surface of the white mold with lost foam casting refractory coating, ...

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

No PUM Login to View More

Abstract

The invention relates to a production process for an internal combustion engine cylinder body and cylinder cover with light weight and high thermal fatigue strength. The production process comprises the technological procedures of prefoaming of polystyrene beads, curing of the pre-foamed beads, blank forming, blank drying, blank combining, paint brushing, drying of the blank coated with paint, box burying and compaction, pouring of molten iron and discharging and polishing. In the step of pouring of the molten iron, vermicular graphite cast iron RuT300 is adopted for the cylinder body and cylinder cover, the molten iron comprises the components of C, Si, Mn, P, S, CE and the balance of Fe, the temperature of the molten iron is kept within 1430-1460 DEG C; the vermicularizing treatment is performed by using a rare earth silicon-iron alloy vermicularizing agent; the vermicularizing rate CG is not less than 60%, the box is vacuumized in pouring, the negative pressure is within -0.05 to -0.06 MPa, and the pressure is kept for 30 minutes. Castings produced by the process have the characteristics of high strength, high toughness and fine grains, and have high size precision and good surface quality.

Description

technical field [0001] The invention belongs to the field of casting of cylinder blocks and cylinder heads of internal combustion engines, and in particular relates to a production material and process of cylinder blocks and cylinder heads of internal combustion engines with light weight and high thermal fatigue strength. Background technique [0002] The energy consumption and pollution discharge of automobiles and tractors as walking machines are related to their own weight, and the higher the speed, the greater the correlation. The internal combustion engine as its power source accounts for about one-third of its weight, and the cylinder block and cylinder head account for nearly one-half of the internal combustion engine's weight, so it is very important to reduce the weight of the cylinder block and cylinder head. Most of the cars are made of aluminum alloy die-casting parts, but their cost is eight or nine times higher than that of cast iron parts. Therefore, gasoline...

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): B22C9/04C22C37/10
Inventor 刘成文
Owner SHANXI MOFAN MACHINERY MFG