The structure is relatively simple
2020年4月25日 https://www.bronzecast.net/
The structure is relatively simple, but the size is large, the wall thickness is thin, and the flanges on both sides of the tank body have SF6 gas sealing requirements. The traditional sand process is difficult to produce. The research team decided to use resin sand molding technology to produce ABB based on the experience of ABB casting technology. The determination of RTV University 2.3 casting system adopts the horizontal molding method for the tank blank casting, and the casting system adopts the casting system for the ladle and four riser gaps, see. The characteristics of this type of pouring system are that it can make the alloy liquid level of the high-volume castings rise evenly during the pouring process, and the filling is stable, and the metal liquid level drop will not be large due to the excessive volume of the casting, forming a high-speed splashing liquid inflow Cavity, the secondary slagging produces defects. The flange part of the end face of the piece is thicker. In order to ensure the formation of a dense structure, a circumferential cold iron is especially added here to prevent shrinkage.
The design of the cross-runner draws on the production experience of ABB-type castings. The upper and lower boxes are separately molded, and the filter screen under the cross-runner prevents the inclusions from entering the cavity. Seen from the plan, the feature of this plan is that the riser can be evenly arranged on the circumference of the casting, which can play the role of uniform stress to prevent deformation while satisfying the shrinkage function. However, there are many outer risers, it is difficult to clean and cut and the amount of grinding is large, and the external surface roughness is difficult to meet the requirements. See plan two. The casting system of this plan is composed of a resin sand core, which ensures the roughness requirements of the outer surface of the casting, and at the same time reduces the size of the sand box, thereby saving the amount of resin sand used and improving the process yield. Place the cold iron at the circumference of the welding groove to make the part solidify first, and the shrinkage is sufficient to form a dense structure to meet the production needs of the next process. The first process plan is the process plan we adopted when producing LW56-550 products. This plan has worm gear wholesalers been verified by actual production and is feasible.
However, the production yield is low, the grinding workload is large, and the roughness of the shape is not ideal. The technical scheme 2 is theoretically feasible, but has not been verified by actual production. In order to perfect the new process and improve the quality of castings, it was decided to boldly adopt scheme two for production. Posing system scheme two conclusion The casting produced three pieces in trial. The casting process as above was used in the production process, all of which were cast at one time. Information feedback after mechanical processing, the dimensional accuracy and intrinsic quality of the castings indicate that the finish completely meets the machining requirements. For tanks that are simple in structure, but large in size, thin in wall thickness, and have SF6 gas seal requirements on both sides of the flange, resin sand molding process, horizontal molding method, package, four riser slot casting systems , Can cast aluminum alloy castings with the quality that meets the requirements.
The structure is relatively simple, but the size is large, the wall thickness is thin, and the flanges on both sides of the tank body have SF6 gas sealing requirements. The traditional sand process is difficult to produce. The research team decided to use resin sand molding technology to produce ABB based on the experience of ABB casting technology. The determination of RTV University 2.3 casting system adopts the horizontal molding method for the tank blank casting, and the casting system adopts the casting system for the ladle and four riser gaps, see. The characteristics of this type of pouring system are that it can make the alloy liquid level of the high-volume castings rise evenly during the pouring process, and the filling is stable, and the metal liquid level drop will not be large due to the excessive volume of the casting, forming a high-speed splashing liquid inflow Cavity, the secondary slagging produces defects. The flange part of the end face of the piece is thicker. In order to ensure the formation of a dense structure, a circumferential cold iron is especially added here to prevent shrinkage.
The design of the cross-runner draws on the production experience of ABB-type castings. The upper and lower boxes are separately molded, and the filter screen under the cross-runner prevents the inclusions from entering the cavity. Seen from the plan, the feature of this plan is that the riser can be evenly arranged on the circumference of the casting, which can play the role of uniform stress to prevent deformation while satisfying the shrinkage function. However, there are many outer risers, it is difficult to clean and cut and the amount of grinding is large, and the external surface roughness is difficult to meet the requirements. See plan two. The casting system of this plan is composed of a resin sand core, which ensures the roughness requirements of the outer surface of the casting, and at the same time reduces the size of the sand box, thereby saving the amount of resin sand used and improving the process yield. Place the cold iron at the circumference of the welding groove to make the part solidify first, and the shrinkage is sufficient to form a dense structure to meet the production needs of the next process. The first process plan is the process plan we adopted when producing LW56-550 products. This plan has worm gear wholesalers been verified by actual production and is feasible.
However, the production yield is low, the grinding workload is large, and the roughness of the shape is not ideal. The technical scheme 2 is theoretically feasible, but has not been verified by actual production. In order to perfect the new process and improve the quality of castings, it was decided to boldly adopt scheme two for production. Posing system scheme two conclusion The casting produced three pieces in trial. The casting process as above was used in the production process, all of which were cast at one time. Information feedback after mechanical processing, the dimensional accuracy and intrinsic quality of the castings indicate that the finish completely meets the machining requirements. For tanks that are simple in structure, but large in size, thin in wall thickness, and have SF6 gas seal requirements on both sides of the flange, resin sand molding process, horizontal molding method, package, four riser slot casting systems , Can cast aluminum alloy castings with the quality that meets the requirements.
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