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21
2021
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02
Foundry: Introduction to the principles of lathe casting
Foundry
Foundry Vehicle: Principles of Bed Casting Casting 1. Sand mold forging and casting should be given priority. The main reasons are that sand mold forging and casting have lower cost, simpler production technology, and shorter production cycle than other methods. When wet molding cannot meet the requirements, consider using clay sand surface dry sand molds, dry sand molds, or other sand molds.
Foundry: Lathe Castings Principles of Casting
1. Sand mold forging should be preferred, mainly because sand mold forging is lower in cost, simpler in production technology, and shorter in production cycle than other methods. When wet molding cannot meet the requirements, consider using clay sand surface dry sand mold, dry sand mold or other sand molds. The weight of castings made by clay wet sand molding can range from a few kilograms to tens of kilograms, while the castings produced by clay dry molding can weigh up to tens of tons.
2、 Casting The method should be adapted to the production batch. Casting methods such as low-pressure casting, die casting, and centrifugal casting are only suitable for mass production due to the high cost of equipment and molds.
3. The modeling method should be suitable for factory conditions. For example, for the production of large machine tool beds and other castings, the core assembly method is generally used, without making patterns and sand boxes, and the core is assembled in the pit; while other factories use the sand box modeling method to make patterns. Different enterprises have different production conditions, production habits, and accumulated experience. They should consider what products are suitable and what products are not suitable (or cannot) be made according to these conditions.
4. Take into account the precision requirements and cost of the castings.
Sand casting is preferred for lathe bed castings, mainly because sand casting is lower in cost, simpler in production technology, and shorter in production cycle than other casting methods. When wet molding cannot meet the requirements, consider using clay sand surface dry sand mold, dry sand mold or other sand molds. The resin sand mold has good rigidity and high sand mold strength in the initial stage of pouring, which makes it possible to use the graphitization expansion of the cast iron solidification process to effectively eliminate shrinkage cavities and porosity defects, and realize the less riser and no riser casting of gray cast iron and ductile iron parts.
The resin sand mold has good rigidity and high sand mold strength in the initial stage of pouring, which makes it possible to use the graphitization expansion of the cast iron solidification process to effectively eliminate shrinkage cavities and porosity defects, and realize the less riser and no riser forging of gray cast iron and ductile iron parts. Large molds such as CNC machine tool bed castings have great advantages over traditional sand molds. They not only save expensive wood mold costs, but also are easy to operate, shorten the production cycle, and improve production efficiency. They have the advantages of high dimensional accuracy, small machining allowance, and good surface quality.
Foundry : Sand casting is commonly used for lathe beds, followed by special casting methods, such as: metal mold casting, investment casting, gypsum mold casting, etc. Sand casting can be divided into clay sand mold, organic binder sand mold, resin self-hardening sand mold, lost mold, etc.
Casting, foundry, casting
Shandong Gongchen Machinery Technology Co., Ltd.
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Address: Mucun Town, Fangzi District, Weifang City, Shandong Province
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