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Connecting rod pressure casting method

A connecting rod and molten metal technology, which is applied in the field of connecting rod die-casting, can solve the problems of variable amount of connecting rod, spilled molten metal, and affecting processing efficiency, etc., and achieves good heat preservation effect, uniform connecting rod, and improved efficiency.

Inactive Publication Date: 2017-05-17
CHONGQING SUTENG MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned connecting rod die-casting process, there are the following problems: 1. The soup ladle is generally made of copper material, and there is a large temperature difference with the high-temperature molten metal. The high-temperature molten metal is easy to quickly condense in the soup ladle, forming a thick As the use time increases, the inner surface of the spoon becomes thicker and thicker, and the amount of high-temperature molten metal entering the sprue seriously does not meet the amount of die-casting connecting rods, and it is necessary to repeatedly scoop the molten metal work, which affects the processing efficiency; at the same time, it will lead to uncertain amount of connecting rod and poor uniformity of connecting rod
2. During the transfer process of the soup spoon, and when the high-temperature molten metal is turned over, part of the molten metal will be spilled, which will also affect the quality of the connecting rod

Method used

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Experimental program
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Effect test

Embodiment 1

[0017] Embodiment 1: a connecting rod die-casting method, comprising the following steps:

[0018] S1: Making billets: Mix high-carbon steel, ductile iron, and malleable cast iron and heat and melt at high temperature to form a high-temperature molten metal. The melting temperature is controlled at 120°C; deslagging;

[0019] S2: Quantitative retrieving: use a spoon to scoop out the high-temperature molten metal, and pour the high-temperature molten metal into the weighing cavity at the gate of the sprue. The inner surface of the spoon is made of carbon gold material, and the outer surface is made of copper material , a metal layer is condensed on the outer surface of the soup spoon; the outer surface of the soup spoon is blown with gas, and the molten high-temperature metal melt flows into the weighing chamber to compensate the weight of the billet, and the temperature of the gas is 100°C;

[0020] S3: Die-casting: The high-temperature molten metal after weighing will flow i...

Embodiment 2

[0028] Example 2 Compared with Comparative Example 1, the outer surface of the soup spoon in Comparative Example 1 is made of copper material, and the temperature difference with the high-temperature molten metal is relatively large, forming a thicker metal layer, which is not effectively used, making the uniformity of the connecting rod Not good, the amount is not enough, and it needs to be scooped many times, which reduces the processing efficiency.

[0029] Example 2 Compared with Comparative Example 2, the connecting rod made in Comparative Example 2 uses a weighing chamber to control the amount. Therefore, the connecting rod has a uniform structure, but the surface made of copper material in the spoon is not compatible with high temperature. The temperature difference of the molten metal is large, and it is easy to condense a thick metal layer. It needs to scoop the molten liquid many times to achieve the required amount, and the efficiency is low.

[0030] Compared with ...

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Abstract

The invention relates to the technical field of connecting rod machining, in particular to a connecting rod pressure casting method. The connecting rod pressure casting method includes the following steps that firstly, a blank is manufactured; secondly, materials are taken quantitatively; thirdly, pressure casting is conducted; and fourthly, stripping is conducted. According to the connecting rod pressure casting method, the temperature difference between a ladle and high-temperature molten metal is adjusted, and therefore a manufactured connecting rod is even in structure, and the machining efficiency is high.

Description

technical field [0001] The invention relates to the technical field of processing of connecting rods, in particular to a die-casting method of connecting rods. Background technique [0002] The connecting rod is an important part in engines such as automobiles and ships. It connects the piston and the crankshaft. Its function is to convert the reciprocating motion of the piston into the rotational motion of the crankshaft, and transfer the force acting on the piston to the crankshaft to output power. The connecting rod is composed of connecting rod body, connecting rod cover, connecting rod bolt and connecting rod bearing bush. The connecting rod body and connecting rod cover are divided into connecting rod small end, shaft and connecting rod big end. The small end of the connecting rod is used to install the piston pin to connect the piston. The big end of the connecting rod is connected to the connecting rod journal of the crankshaft, and is generally made into a split ty...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D17/08
CPCB22D17/08
Inventor 王全中
Owner CHONGQING SUTENG MACHINERY MFG