Connecting rod liquid-state die forging process

A liquid die forging and process technology, applied in the field of connecting rod liquid die forging technology, can solve the problems of inability to meet product performance requirements, complex cutting and production processes, and inability to simplify mold structure, etc., and achieves fine grain size and high material utilization rate. , the effect of dense tissue

Inactive Publication Date: 2013-01-09
吴玉荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanical properties of the products produced by the above method are poor and cannot meet the product performance requirements; and because of the complex cutting process, the mold structure cannot be simplified, resulting in a long production cycle and low efficiency. Causes the loss of metal materials, so that the material utilization rate is also low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: Connecting rod liquid die forging process, which includes the following steps:

[0017] (1) Design the mold, that is, design the liquid forging mold according to the connecting rod structure, shape, size and performance requirements;

[0018] (2) Aluminum alloy smelting, clean the surface of the aluminum alloy, put it in a crucible and heat it. When the crucible is heated to 500~760℃, add the aluminum alloy blank to melt, and remove the scum on the liquid surface after melting;

[0019] (3) During the liquid forging process, install the above-designed mold on a hydraulic press and debug the mold. When the mold is heated to 100-150°C, spray lubricant into the mold cavity; when the mold is heated to 280°C, The molten aluminum alloy liquid is poured into the mold cavity, and the temperature of the aluminum alloy liquid is 710℃; when the aluminum alloy liquid is poured into the mold, the working pressure is maintained at 16Mpa, and the pressure holding time is 10S;

[00...

Embodiment 2

[0021] Embodiment 2: Connecting rod liquid die forging process, which includes the following steps:

[0022] (1) Design the mold, that is, design the liquid forging mold according to the connecting rod structure, shape, size and performance requirements;

[0023] (2) Aluminum alloy smelting, clean the surface of the aluminum alloy, put it in a crucible and heat it. When the crucible is heated to 500~760℃, add the aluminum alloy blank to melt, and remove the scum on the liquid surface after melting;

[0024] (3) During the liquid forging process, install the above-designed mold on a hydraulic press and debug the mold. When the mold is heated to 100-150°C, spray lubricant into the mold cavity; when the mold is heated to 220°C, The molten aluminum alloy liquid is poured into the mold cavity, and the temperature of the aluminum alloy liquid is 750℃; when the aluminum alloy liquid is poured into the mold, the working pressure is maintained at 20Mpa, and the pressure holding time is 5S;

[...

Embodiment 3

[0026] Embodiment 3: Connecting rod liquid die forging process, the process includes the following steps:

[0027] (1) Design the mold, that is, design the liquid forging mold according to the connecting rod structure, shape, size and performance requirements;

[0028] (2) Aluminum alloy smelting, clean the surface of the aluminum alloy, put it in a crucible and heat it. When the crucible is heated to 500~760℃, add the aluminum alloy blank to melt, and remove the scum on the liquid surface after melting;

[0029] (3) During the liquid forging process, install the above-designed mold on a hydraulic press and debug the mold. When the mold is heated to 100-150°C, spray lubricant into the mold cavity; when the mold is heated to 250°C, The molten aluminum alloy liquid is poured into the mold cavity, and the temperature of the aluminum alloy liquid is 730℃; when the aluminum alloy liquid is poured into the mold, the working pressure is maintained at 18Mpa, and the pressure holding time is ...

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PUM

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Abstract

The invention aims at the defects in the prior art and mainly provides a connecting rod liquid-state die forging process which is high in production efficiency, material-saving and low in cost. Products produced by means of the process are good in mechanical property. The connecting rod liquid-state die forging process comprises the following steps of (1) designing a die; (2) smelting aluminum alloy; and (3) in the liquid-state die forging process, installing the designed die on a hydraulic machine, debugging the die, spraying a lubricating agent towards a die cavity when the die is heated to be 100-150 DEG C, casting molten aluminum alloy into the die cavity when the die is heated to be 220-280 DEG C, wherein the temperature of the molten aluminum alloy in casting is 710-750 DEG C, the work pressure is maintained to be 16-20 Mpa and the dwell time is 5-10s after the molten aluminum alloy is poured into the die; and (4) performing follow-up treatment, namely taking out a liquid-state die forging piece, quickly placing the liquid-state die forging piece into a sand pile to be cooled, performing quenching and tempering to obtain a connecting rod.

Description

Technical field [0001] The invention relates to a liquid die forging process, in particular to a connecting rod liquid die forging process. Background technique [0002] The existing connecting rod manufacturing process generally selects steel and adopts hot die forging. The general process flow is: first select the blank, then heat it to a certain temperature, and then die forging on a press. The product produced by the above method has poor mechanical properties and cannot meet the product performance requirements; and due to the complex cutting production process, the mold structure cannot be simplified, resulting in a long production cycle and low efficiency. In addition, burrs and solid holes in this process method Cause the loss of metal materials, so that its material utilization rate is also low. [0003] In view of the above problems, the inventor proposed a new connecting rod liquid die forging process, which solved the above problems well. Summary of the invention [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/02
Inventor 吴玉荣
Owner 吴玉荣
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