The main machine of excavator balance weight is an export product, and the requirements of surface quality and geometric size are very strict. In the past, resin sand casting technology was mostly used; However, the resin sand casting process should be equipped with special tooling. In addition, the recycling...
1 Mold Design According to the overall dimension of the product, the size of sand box is 550 mm × 1400 mm × 450 / 600 mm (inner cavity), 1 piece / box. The inner cavity of the product is designed to be molded with integral resin sand core....
1 Production Process The production process is shown in Fig. 1 ~ 5, including coating spraying, coating drying, core setting, box closing pouring and sand falling out of box. 2 Casting Inspection 2.1 Surface Quality Comparison Compared with resin sand process, the surface quality of castings produced by V-process...
1 Chemical Composition Casting material grade QT450-10, raw material ratio: Q12 pig iron 50%, recycled material 35%, grade I scrap 15%, chemical composition is shown in Table 1. 2 Production Parameters (1) Discharging temperature: 1 520 ~ 1 540 ℃, adjusting temperature of molten iron: 1 480 ~ 1...
The casting of the front axle of a forklift truck is shown in Figure 1, and the outer dimension is 885 mm × 645 mm × 635 mm, unit weight 472 kg, main wall thickness 33 mm. The material is QT450-10 with spheroidization grade of 1-3; The size of...
Vacuum casting is a kind of physical molding casting method, which adopts dry sand molding without moisture, binder and any other additives, and maintains a certain negative pressure during pouring and solidification. Compared with the traditional casting technology, v-casting can reduce the labor intensity of molding and casting cleaning....
The control system of vacuum differential pressure casting is one of the key factors to ensure the quality of castings, especially thin-walled castings. The early control system is mostly manual control, the control operation is not stable, and the casting quality is difficult to guarantee. In the past 20...
In order to meet the requirements of lightweight and integration of components, a large number of large-scale complex thin-walled aluminum alloy castings are widely used in the field of aerospace. This kind of products have higher and higher requirements for castings, which put forward the requirements of large size,...
Vacuum die casting is an advanced die casting technology, which can eliminate or reduce the defects such as air entrainment and air hole in the die casting die cavity and improve the mechanical properties and surface quality of the die casting parts. Vacuum die casting is a high near...
V casting process method known as “vacuum seal shape casting” or “the negative shape casting” which with conventional sand casting are very different. It is use of non- adhesive dry sand do modeling material, use of plastic film sealing sand box, type extracted by vacuum extraction system within the air...