The main casting defects of coupler body include crack, air hole, sand inclusion and mechanical sand sticking. The main parts of the crack include the root of the pouring and riser, the hook shoulder, the corner of the complex curved surface of the hook head and so on. Figure...
Different steel casting production processes determine different production processes, but they can be basically divided into process design, model making, molding and core making, lower core box, smelting and pouring, sand falling, gas cutting and gouging, heat treatment, grinding and cleaning, inspection and other processes. The shrinkage cavity and...
1.Problem description Sand casting boom steel casting, steel casting No. 322232642, is an accessory of atlas process engineering machinery rock drill in the Netherlands. During the sampling inspection of small batch production after the preliminary trial production is qualified, it is found that some products have shrinkage defects locally,...
Inspection and test are important means to ensure the quality of steel castings and the process quality of steel castings. In the production process of coupler, in addition to the inspection of raw materials, the real-time monitoring of various process parameters of medium sand in sand treatment system, and...
When designing steel castings, the sensitivity of the mechanical properties of cast alloys to the wall thickness of steel castings must be considered. When thick wall steel castings solidify at last, it is easy to produce defects such as shrinkage cavity (looseness), coarse grain and component segregation. Refer to...
The steel castings were trial produced in two batches, and the first time was qualified, and the second time there was shrinkage cavity and porosity defect. After investigating the five aspects of personnel, machines, materials, methods and links, since there are no abnormal changes, it is inferred that the...
In order to verify the feasibility and universality of the proposed process design improvement method, three typical steel castings produced according to the traditional process design method were selected for application analysis and verification. The name of steel casting is shell, and the number of steel casting is 136-18-03001....
The production of coupler is divided into two work areas: sand casting and finishing assembly. The main processes of sand mold casting work area include: sand treatment, molding, core making, box closing, smelting, pouring, sand dropping, primary cleaning, pre normalizing, flaw detection, welding repair, quenching and tempering, hardness, etc....
The shrinkage rates of several common iron carbon alloys are shown in the table. It can be seen from the table that the shrinkage rate of carbon steel is the largest in the table. Material Science Pouring temperature / ° C C Si Mn P S Mg Shrinkage rate...
Through the production verification of product k141 and the implementation of lack of vision countermeasures, it can be seen that combined with the filling capacity of liquid metal, the solidification mode of steel castings and the shrinkage of steel castings, it is difficult to design a perfect sand casting...