Casting process design

Choose an open bottom pouring system. According to the material of the casting, it is determined that the sprue cup is made of refractory bricks, and the pouring system is made of ceramic pipes. When designing the pouring system, in order to obtain good casting quality, the method of relative pouring in the width direction is adopted, that is, the two sprues are connected to the sprue cup through a "bridge" method, and their distribution is shown in Figure 2. The blocking section design method is used to calculate the dimensions of each pouring system of the casting [4. The cross-sectional area of the sprue is 50.24cm2 and the height is 1030mm; the cross-sectional area of the cross-runner is 50.24cm2 and the length is 4525mm; the cross-sectional area of the inner runner is 31.4cm2 , the length is 60mm; the cross-sectional area of the "bridge" sprue is 50.24cm2, and the length is 3040mm. The design uses riser feeding and cold iron to enhance sequential solidification. The risers are easy to cut. There are 32 risers in 1#, a cylinder with a diameter of 180mm and a height of 360mm. There are 8 risers in 2#. It is a cylinder of 250mm and 360mm high. The placement of the riser and cold iron is shown in Figure 3 and Figure 4. This piece is a long casting with an outline size of 4600mmx2550mmx550mm. In order to prevent deflection and deformation, when making the plastic pattern, an anti-deformation plastic pattern is made in the opposite direction of the possible deformation ("hot and cold convex" [5]) of the casting. ; Leave the amount of reverse deformation at 2mm/m