The choice of precision forging iron cooler materials, can make a lot of cold iron materials, generally than the thermal conductivity of sand material, heat storage coefficient of metal and non-metal materials can be selected. The commonly used cold iron materials in the production are cast iron, aluminum alloy, graphite and copper alloy. Cast iron cooler has a larger heat storage coefficient, can absorb more heat, has a relatively strong chilling ability.
Precision forging processing of the forgings is commonly used in the shaft, precision forgings is the key of the equipment and the center of the parts, some precision forgings can also work, the whole machine precision forging on yield, yield up is piece of precision forging of scrap is a great, appropriate precision forging machine operation of frequent and irregular can make to reach the intention of saving energy.
Precision forging processing characteristics that is to define the of forgings, and the decline of the product components of the capital, the shape of the right parts is mixed and disorderly, use sex is relatively high, precision forging is not in any case have something affordable, performance requirements, in accordance with the batch of product yield, capital and economic benefits to consider. The greater the volume of precision forgings, the better the benefit
The processing characteristics of precision forgings are as follows:
1. Large weight scale. Forgings can be as small as a few grams to as large as several hundred tons
2, higher than casting quality. The mechanical properties of forgings are better than castings, can accept large impact effect and other heavy loads, so, all the important parts with large forces are selected forgings. Forgings are of better quality than rolls for high - carbide steels. For example, as long as the high speed steel rolling material through the forging talent satisfied with the application requirements. In particular, the high speed steel milling cutter must be modified.
3, light weight. Under the premise of ensuring the planning strength, the weight of the forging is lighter than that of the casting, which reduces the weight of the machine itself, and has important implications for vehicles, aircraft, vehicles and robots.
4. Save raw materials. For example, the static weight of the crankshaft used in the car is 17kg. When the rolling material is used for cutting and casting, the chip accounts for 189% of the crankshaft weight, while when the die is used for forging, the chip accounts for only 30%, and the machining time is shortened by 1/6. Precision casting forgings can not only save more raw materials, but also save more machining hours.
5, high yield. For example, two hot die forging press die forging radial thrust bearings can replace 30 automatic cutting machines. When the top forging automata is used to produce M24 nuts, the yield of the six-axis automatic lathe is 17.5 times.
6, free casting flexibility, therefore, some repair factories widely choose casting method to produce a variety of accessories.