According to the cause of mechanical sand sticking and the actual production conditions of the company, the process improvement direction is formulated to improve the structural strength of the sand core, reduce the micro pore size on the surface of the sand core and improve the cleaning capacity of...
1. Core making process of cylinder water jacket The triethylamine cold core making method is adopted, and the process parameters are shown in the table. Main components of core sand: SiO2 ≥ 92%, silt content ≤ 0.35%, moisture ≤ 0.2%. The number of core sand mesh is 40/100 mesh,...
1. Chemical composition detection The ARL3460 direct-reading spectrometer is used for chemical composition detection. The results of chemical composition detection are shown in Table 1. Value Wire feeding length/m Wire feeding speed/m · min^-1 Temperature before wire feeding/℃ Reaction time/s Pouring temperature/℃ Project 14.5±0.15 18±0.2 1 430～1 450 40～60...
1. Improvement of cavity arrangement process As shown in the figure, the improved ductile iron casting process changes the original strip arrangement into a star arrangement. The star arrangement is relatively concentrated, and heat sources are added to each other at the outer wall. The heat dissipation rate of...
Preheat the mold with natural gas flame, then spray paint on the surface, and raise the temperature to about 300 ℃. Pour the melted ZL102 alloy liquid into the mold, take out the sand casting after solidification and forming, and check the surface quality and size of the casting....
See Fig. 1 and Fig. 2 for the structure of box and cover. Sand castings are made of ZAlSi12 aluminum alloy, and the maximum outline size of the box is 307mm × ２３６．８ｍｍ × 90.5mm, the average wall thickness is 4mm, and the thickest part is 27mm; The maximum...
In order to evaluate the resources and environmental load of typical sand casting process more intuitively and effectively, a comprehensive evaluation index is proposed based on the evaluation results of resources and environmental load. The calculation process of comprehensive evaluation index is as follows: (1) Select the evaluation object,...
A total of 25 planet carriers were produced in 10 batches by using the optimized casting process plan. Except for one piece with cracks on the cutting surface due to improper cutting riser, no macro defects such as porosity, shrinkage cavity and cracks were found on the remaining castings...
In order to cut the area with casting defects in the casting diaphragm, it is necessary to first understand the characteristics of the casting diaphragm defect area, including the size, distribution, depth, etc. of the defect area. The inspection shows that in the casting defect area of the diaphragm,...
During the operation of the unit, the left and right sides of the casting diaphragm will produce stress under different pressures. If the stress is too large, the gap position between the diaphragm and the casing will be damaged. If the axial and radial deformation of the casting diaphragm...