A chilled iron core frame assembly device and manufacturing method for casting sand core of generator cylinder body

Abstract

The invention relates to the field of equipment for a casting technique, in particular to a cold iron and core rod combining device for casting of a sand core of a generator cylinder block and a manufacturing method. The cold iron and core rod combining device for casting of the sand core of the generator cylinder block comprises a core box which is used for forming the semi-cylindrical sand core, wherein an arc-shaped inner molded surface is formed in the bottom of the core box, and a cold iron and core rod combining device body which is connected fixedly and used for core manufacture is arranged in the core box. According to a cold iron and core rod structure, cold iron 4 and a core rod framework can be fixedly connected firstly before sand filling, complicated work of manual placement of the cold iron is avoided during sand filling, and the positioning accuracy of the cold iron 4 and the sand filling efficiency are improved; the cold iron and core rods are fixed through welding and the like, mechanical compaction can be performed after sand filling, and the compactness of the sand core is improved.

Description

technical field [0001] The invention relates to the field of casting technology equipment, in particular to a cold iron core bone assembly device and a manufacturing method for casting sand cores of cylinder blocks of gas turbine generators. Background technique [0002] Cylinder block castings for gas turbine power generation products generally include intake cylinders, compression cylinders, exhaust cylinders and turbine cylinders. Most of them are cast steel or ductile iron products with high performance requirements, large wall thickness and high casting quality requirements. In the casting process, it is necessary to adjust the solidification process of the liquid metal through chilled iron, which is complicated in operation and difficult in production. [0003] In casting, there are mainly three kinds of cold iron materials commonly used, namely cast iron cold iron, steel cold iron and graphite cold iron. In the actual production process, it is first necessary to mar...

AI Technical Summary

Problems solved by technology

[0004] (1) A release agent is often used on the surface of the pattern. The commonly used release agent is a silver powder release agent. This release agent is opaque and will cover the position mark of the cold iron, making the mark lose its guiding effect; the paraffin release agent has a certain degree of transparency. However, the application operation requires high technology, high cost, and less use;

[0005] (2) The cold iron position mark on the pattern is easy to wear and needs regular maintenance, which increases production management costs;

[0006] (3) After using the chilled iron, the vibrating compaction platform cannot be used, because the chilled iron is fixed by the extrusion of the sand in the sand mold, and the vibration compaction may cause the chilled iron to shift, and it will also cause gaps around the chilled iron. The cold iron is easy to drop, and the molding sand in the gap between the cold iron and the iron can only be compacted by hand, and the compacting effect is poor;

[0007] (4) The cold iron needs to be placed by hand, and the weight should not be too large, so the volume of cast iron or steel cold iron is small, so the quantity is large, the labor intensity is high, and the production efficiency is low; the density of graphite cold iron is small, and the volume can be designed Larger graphite chills, but more recycling, management and storage issues;

[0008] (5) Since the design volume of the cold iron is limited by hand-held operation, there are many gaps between the cold iron during use, and the strength of the molding sand in the gap is difficult to guarantee, which increases the risk of sand inclusion in the casting;

[0009] (6) Since each piece of cold iron is manually placed, the quality of the cold iron fluctuates, the variety of cold iron specifications, and the skills of the operators bring more unstable factors to product quality control, which easily leads to fluctuations in casting quality, or Increased management costs

Images