Improvement and production verification of a new vibrating table for lost foam casting

The flywheel housing is placed vertically in the lost foam casting sand box (as shown in Fig. 1), and there are two parts to be filled (as shown in Fig. 2). Position 1 needs to be filled laterally by 70 mm, position 2 needs to be filled laterally by 128 mm, and there is one 53 mm away from the filling root φ 17 mm round hole. For position 1, 0 ° reciprocating vibration is adopted, the force is 76%, and the time is 32 s; Position 2, 30 ° unidirectional vibration, force 78%, time 30 s; 150 ° unidirectional vibration, 78% force and 30 s time. The vibration was carried out according to the above process, a total of 16 pieces were debugged and verified, and there was no sand sticking in 2 places. In the later production, the scrap rate of bonded sand decreased from 2.76% to 0.67%.

According to the transverse and longitudinal measurement of the inner diameter of the flywheel housing stop, it can be seen that the deformation of the stop is significantly improved, and the difference between the transverse and longitudinal diameters is 0.5 mm, which is significantly improved compared with the previous 1.8 mm.

By using the new vibrating table, the Z-dimensional deformation is significantly reduced, and the relevant scrap rate is reduced from 2.9% to 0.65%.