The casting defects of coupler tongue include crack, sand inclusion, mechanical sand sticking and other defects. In the actual trial production, the crack defects of the hook tongue mainly include the root of the gate, the middle and upper part of the inner wrist surface, the opening part of...
The blow hole defects produced by wet molding clay sand cast steel process are mainly intrusion blow hole and precipitation blow hole. Intrusive blow hole defect is that gas intrudes into liquid metal from the outside, mainly from molding sand, core sand, cold iron, etc., or may be involved...
Many parts of construction machinery such as bulldozers and excavators are cast steel castings, which often have shrinkage defects. Light shrinkage and porosity will increase the cost of repair and inspection, and heavy shrinkage and porosity defects will lead to the scrapping of steel castings. Combined with the actual...
The defects of shrinkage cavity and porosity are briefly introduced. Combined with the theories of filling capacity of liquid metal, solidification mode of steel castings and shrinkage of steel castings, the process design of traditional steel castings is carried out by taking the accessory bracket of a construction machinery...
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...