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Oil pan machining process

A processing technology and oil pan technology, applied in the field of oil pan processing technology, can solve the problems of inability to effectively reduce the number of pores in the casting, low elongation of the bottom of the oil pan, and poor stability of the casting process, etc., to achieve Avoid large-area quenching, high degree of automation, and ensure the effect of stability

Inactive Publication Date: 2015-01-21
中山市鸿程科研技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the application number 201310026183.X discloses a casting process for the oil pan of a diesel engine. Flanges are arranged on the surrounding edges of the housing, and the inside of the housing forms a left cavity and a right cavity, and a gate is set in the right cavity. , the depth of the left cavity is deeper than the depth of the right cavity, the lower part of the left cavity is wider and the lower part is narrower, and the width of the upper part of the left cavity is consistent with the width of the right cavity. Zinc oxide treatment, mold closing, liter liquid pouring, and sawing off the sprue to obtain the diesel engine oil pan. The invention has superior appearance, good sealing performance, reduces the leakage rate of castings, and has excellent mechanical properties and durability. The invention belongs to one-time casting molding, and the liquid pouring cannot effectively reduce the number of pores in the casting, and the stability of the casting process is not good, so that the elongation of the bottom of the obtained oil pan is not high, and the impact resistance is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. Melting: Put the aluminum alloy ingot into the melting furnace to preheat, and keep it at 400℃ for 3h. After all the aluminum alloy ingots are melted, the temperature will rise. When the alloy liquid temperature reaches 620℃, press the refining agent into the alloy liquid slowly. Rotate uniformly until the reaction stops. After refining, let it stand for 15 minutes, then remove the slag on the surface of the alloy liquid, and then transfer the alloy liquid to the holding furnace. The aluminum alloy ingot material is AlSi10Mg, the Mg content is 0.65%, and the maximum Cu content is 0.05%. , Fe content is 0.75%;

[0022] 2. Die-casting: heat the melted alloy in step (1) for die-casting at 560°C, install two vacuum valves on the mold for vacuum die-casting, and process a heating oil channel in the die-casting mold, connect the mold heater, and use constant temperature Die casting to ensure the stability of the die casting process;

[0023] 3. De-Gating: Use a de-gating machi...

Embodiment 2

[0028] Example 2: The rest is the same as Example 1, except that in the step (1), the aluminum alloy ingot material is AlSi10Mg, the Mg content is 0.65%, the Fe content is 0.95%, and the preheating temperature of the smelting furnace during smelting is kept at 250°C. After 3.5h, all the aluminum alloy ingots are melted and the temperature is raised. When the temperature of the alloy liquid reaches 610℃, the refining agent is pressed into the alloy liquid. Die-casting needs to heat the molten alloy at 550℃. The temperature of the bottom of the oil pan reaches 395℃, keep it at this temperature for 120s and then cool naturally in the air, the whole process is 3.5min.

Embodiment 3

[0029] Example 3: The rest is the same as Example 1, except that, in the step (1), the aluminum alloy ingot material is AlSi10Mg, the Mg content is 0.9%, the Fe content is 0.75%, and the preheating temperature during smelting is 280°C for 4 hours. After the aluminum alloy ingots are all melted, the temperature is raised. When the temperature of the alloy liquid reaches 600℃, the refining agent is pressed into the alloy liquid. Die-casting needs to heat the molten alloy at 440℃, and the temperature of the bottom of the oil pan reaches 405℃ during heat treatment. , After keeping at this temperature for 120s, it will cool naturally in the air, the whole process is 4min.

[0030] After the above process steps, take out the lens sample for testing:

[0031] Serial number Elongation A5 Whether there are cracks Protruding part hardness / HB Hardness at mounting hole / HB Example 1 10% no6587 Example 2 9.5% no6082 Example 3 11% no6285

[0032] From the above data, it can be seen that ...

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Abstract

The invention discloses an oil pan machining process and relates to the field of automobile engine accessories. The oil pan machining process comprises the seven process procedures of smelting, pressure casting, degating, heat treatment, cutting, flash removing and sealing testing. According to the oil pan machining process, smelting and impurity removing are conducted on aluminum alloy according to a certain ratio; through vacuum constant-temperature pressure casting, stability in the pressure casting procedure can be guaranteed, and the porosity of an oil pan can be smaller than 4%; local high-frequency quenching is conducted on the bottom of the oil pan, large-area quenching is avoided, the elongation percentage, shock resistance and local hardness of the oil pan can be further improved, engineer specification requirements are met, the process is simple, and a high automation degree can be achieved by applying the oil pan machining process to flow line production.

Description

[0001] technical field [0002] The invention relates to the field of automobile engine accessories, in particular to an oil pan processing technology. [0003] Background technique [0004] The oil pan is located at the lower part of the engine, and seals the crankcase as the outer shell of the oil storage tank. The oil pan is mostly stamped from thin steel plates, and the ones with more complex shapes are usually cast iron or aluminum alloy. There is an oil stabilizing baffle inside. In order to avoid the shock and splash of the oil surface caused by the bumping of the diesel engine, it is beneficial to the precipitation of lubricating oil impurities. For example, the application number 201310026183.X discloses a casting process for the oil pan of a diesel engine. Flanges are arranged on the surrounding edges of the housing, and the inside of the housing forms a left cavity and a right cavity, and a gate is set in the right cavity. , the depth of the left cavity is deepe...

Claims

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Application Information

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IPC IPC(8): B23P15/00B22D18/06C22F1/04
CPCB23P15/00B22D18/06C22F1/04
Inventor 李丽娟王建武
Owner 中山市鸿程科研技术服务有限公司
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