What is the roughness of general die cast aluminum alloy parts?
Jul 06, 2022
1, aluminum alloy die casting process surface roughness is generally Ra3.2~6.3;
2. The dimensional tolerance of die castings is selected according to the National standard GBT1804-M, and the tolerance grade is generally selected according to level 5.
The technical requirements of aluminum alloy die casting mainly include three aspects:
1. Mechanical properties: When the die casting sample is used for inspection, the mechanical properties should conform to the provisions of GB/T15115. When die casting body test is used, the mechanical properties of the sample with specified cutting degree should not be less than 75% of the single casting sample. Dongguan aluminum alloy die casting, aluminum alloy die casting.
2, die casting size: the geometric shape and size of the die casting should conform to the requirements of the casting drawing. The dimensional tolerance of aluminum alloy die casting parts should be carried out according to GB6414. If there are special regulations and requirements, they should be indicated on the drawing. Dimensional tolerances for die castings do not include casting inclination. The machining allowance of die castings shall be in accordance with GB/T11350 when machining is required.
3, surface quality, casting dimensional accuracy is high, surface roughness is low: casting surface roughness should comply with the provisions of GB6060.1. The casting is not allowed to have cracks, undercasting, looseness, air bubbles and any penetrability defects, as well as scratches, depressions, lack of flesh and mesh burrs.
Die-casting aluminum alloy products are mainly used in traffic signal lamp shell, handle, fishing boat accessories, outdoor lock, electrical products, communication equipment, kitchen accessories, motorcycle radiator and horn cover, LED lamp shell, camera equipment, radiator, auto parts, electronic communication equipment, electronic game shell and other industries. Some high-quality aluminum alloy products with high performance, high precision and high toughness are also used in large aircraft, ships and other industries with high requirements.
Aluminum die casting is a kind of pressure casting parts, is to use the installed pressure casting mold casting machine die casting machine, the heat of liquid poured into the aluminum or aluminum alloy die-casting machine into the mouth of the die casting machine die casting, casting the shape and dimensions of the mould limit of aluminium or aluminium alloy parts, such parts are often called aluminum die casting.
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