Die Casting Parts Design Specification
Die casting is a pressure casting parts, is the use of casting mold casting pressure casting machine die casting machine, will be heated to liquid copper, zinc, aluminum or aluminum alloy and other metal into the die-casting machine inlet, the die casting machine Die-casting, casting molds that limit the shape and size of copper, zinc, aluminum parts or aluminum parts, such parts are usually called die castings. Die castings in different places, such as die-casting parts, pressure castings, die castings, die-cast aluminum, die-cast zinc pieces, die-cast copper pieces, copper die castings, zinc die castings, aluminum die castings, Alloy castings, aluminum alloy die-casting parts.
As the metal copper, zinc, aluminum and aluminum alloy has good flow and plasticity, and casting processing is in the pressure of the die casting machine casting, so aluminum die can make a variety of more complex shapes, but also can be made more High precision and finish, thus greatly reducing the amount of machined metal and copper, zinc, aluminum or aluminum alloy casting margin, not only save the power, metal materials, but also significant savings in labor costs; and copper , Zinc, aluminum and aluminum alloy has excellent thermal conductivity, a small proportion and high workability; so die casting is widely used in automobile manufacturing, internal combustion engine production, motorcycle manufacturing, motor manufacturing, oil pump manufacturing, transmission machinery manufacturing, Precision instruments, landscaping, power construction, building decoration and other industries.
Die cast parts can be manufactured as die-casting auto parts, die-casting automotive engine parts, die-casting air-conditioning accessories, die-casting gasoline engine cylinder cylinder head, die-casting valve rocker, die-casting valve bearings, casting power accessories, die-casting motor cover, die casting shell, Shell, die-casting construction accessories, die-casting decorative accessories, die-casting rails accessories, die-casting rounds and other parts, with the domestic manufacturing equipment industry continues to improve the level of equipment, die-casting machine equipment level is also significantly improved, Get the expansion, die-casting parts of the accuracy of the complexity of the parts have also been greatly improved, I believe that in the near future, die-casting will be better serve our production and life!
The control of the surface temperature of the die-casting mold is very important for the production of high-quality die castings. Uneven or inappropriate mold temperature can also lead to unstable casting size, in the production process of casting deformation, resulting in hot pressure, viscose, surface depression, within the hole and heat bubbles and other defects. When the temperature difference is large, the variables in the production cycle, such as filling time, cooling time and spraying time, have different effects.
The design of the die casting must take into account the wall thickness of the die castings, the casting fillet and the stripping slope, the minimum distance between the casting holes and the holes in the die castings, the rectangular holes and grooves on the die castings, Pieces of the inserts, die casting processing allowance in seven areas.
Casting fillet design specifications: usually die-casting parts of the intersection should be rounded (except parting surface), the metal can be filled when the flow is smooth, the gas is also easier to discharge, and to avoid cracks due to sharp angle. For the need for plating and finishing die casting, fillet can be evenly plated to prevent the accumulation of paint at the corners. The fillet radius R of the die cast is generally not less than 1 mm and the minimum fillet radius is 0.5 mm.
First, the number of insert on the die cast should not be too much; Second, the insert and die casting connection must be strong, while the requirements of the slot on the insert, raised, knurled, and so on; Once again, the insert must avoid sharp corners to facilitate the placement and to prevent the stress concentration of the casting. If there is serious electrochemical corrosion between the casting and the insert, the insert surface needs to be protected by the coating; finally, the insert should be avoided Heat treatment, so as to avoid the phase change of the two metals caused by volume changes, so that the insert loose.