Process for casting piston-ring blanks

A casting process and piston ring technology, which is applied in the casting process field of piston ring blanks, can solve the problems of low casting process yield, low work efficiency, and large riser ratio, and achieve stable product quality, increase yield, and meet performance requirements. The effect of indicators

Active Publication Date: 2012-04-11
石家庄金刚内燃机零部件集团有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The quality of the material depends on the quality of the piston ring blank. The manufacture of the existing piston ring blank is stacked sand casting. The mold plate used to make the sand mold has a direct sprue. According to the size of the model ring, there are 2 or 4 connected. Or 6 ingates, and then one ingate is connected to a model ring. The s

Method used

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  • Process for casting piston-ring blanks
  • Process for casting piston-ring blanks
  • Process for casting piston-ring blanks

Examples

Experimental program
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Effect test

Embodiment 1

[0039] This embodiment is used to produce piston ring blanks and φ102 oil ring blanks with a cylinder diameter of 160mm, and each process is operated as follows.

[0040] A. Forming plate: According to the cylinder diameter of the piston ring and the section coefficient of the piston model ring, design the collar plate required for modeling. The section coefficient is the ratio of the cross-sectional area of ​​the piston ring to the section perimeter. In this embodiment, because a piston ring with a cylinder diameter of 160 mm is to be produced, and according to the requirements of the embodiment, the gas ring of this embodiment adopts a flat ring, so a flat ring model ring blank with a diameter of 160 mm must be produced. According to the section coefficient of the piston model ring The principle of matching, the section coefficient of the φ160 flat ring model ring is 1.14, and the section coefficient of the φ102 oil ring model ring is 1.08, which is relatively matched. Theref...

Embodiment 2

[0064] This embodiment is used to produce piston ring blanks and φ90 oil ring blanks with a cylinder diameter of 130 mm. The gas ring model ring is still a flat ring model ring. The process steps are the same as those in Embodiment 1, except that.

[0065] Step A: When making the collar plate, since the section coefficient of the φ130 flat ring model ring in this embodiment is 1.30, the diameter of the oil ring model ring matching the section coefficient of the φ130 flat ring model ring is 90mm, and the diameter of the φ90 oil ring model ring is The ring section coefficient is 1.317. Therefore, when making the collar plate, it is determined to use a flat ring model ring blank with a diameter of 130mm to nest an oil ring model ring with a diameter of 90mm.

[0066] The structure of the collar plate in this embodiment is different from that in Example 1. The collar plate in this embodiment includes a bottom plate, on which a sprue is arranged, and four flat sprues connected to t...

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Abstract

The invention discloses a process for casting piston-ring blanks. The process mainly comprises the steps of template manufacturing, sand mulling, modeling, smelting, casting, sand shakeout, blank sorting, cleaning and blank finishing; and a template used in the step of modeling is of a lantern ring structure, and a gas-ring model loop and an oil-ring model loop (the section modulus of a blank of the gas-ring model loop is close to that of the oil-ring model loop) are selected and bonded in one baseplate to carry out casting, therefore, on the basis of ensuring the stable product quality, the product yield and working efficiency of the casting process for piston-ring blanks can be significantly improved, and the production cost can be reduced.

Description

technical field [0001] The invention belongs to the technical field of manufacturing internal combustion engines and parts thereof, in particular to a casting process of piston ring blanks. Background technique [0002] The internal combustion engine is a kind of power machinery, which is a heat engine that directly converts the heat energy released into power by burning fuel inside the machine. The internal combustion engine is a mechanical device with a wide range of uses, and the piston ring is one of the most critical parts in the internal combustion engine. Piston rings mainly include gas rings and oil rings according to their functions; gas rings are mainly used to prevent gas leakage, and are generally composed of 2 to 3 rings. Gas rings can be divided into flat rings, conical rings, twisted rings, etc. according to the cross-sectional shape The oil ring has an oil return hole or an equivalent structure, which can scrape the oil from the cylinder wall. Generally, the...

Claims

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Application Information

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IPC IPC(8): B22C9/22C22C37/10C22C33/08F16J9/00
Inventor 王季明贾改丽王焕平张彩霞雷敬茂
Owner 石家庄金刚内燃机零部件集团有限公司
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