Archives

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Cleaning and deformation of valve castings

It can be seen from Fig. 1 and Fig. 2 that the inner cavity of the casting of the electro-hydraulic valve body is complex, resulting in the difficulty of sand cleaning of the casting oil channel. After many process improvements and trial production, the sand core is finally soaked...

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Casting defects of electro-hydraulic valve casting

(1) there are two slender oil passages in the casting of electro-hydraulic valve casting, and it is difficult to form the slender sand core; (2) the wall thickness of the valve casting is uneven and the material is high-strength nodular cast iron. When casting with green sand, it is...

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Casting defects of electro-hydraulic valve casting

The casting structure of the electro-hydraulic valve casting is complex (as shown in Figure 1), with two slender and curved independent oil passages, each with a length diameter ratio of 20 (as shown in Figure 2). When casting these two oil passages, the sand core is made by the...

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Quality stability of electrohydraulic valve castings

Electro hydraulic valve casting is a kind of hydraulic control element. Its control pressure is much higher than that of conventional valve casting, and its structure is also complex. In order to ensure the service performance of electro-hydraulic valve casting, it has high requirements for valve casting. The casting...

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Ductile iron valve body of excavator hydraulic control valve

Excavators are widely used in highway, bridge, construction, breeding pond, underground engineering, emergency excavation and other engineering construction fields. It is characterized by large power and high efficiency. The hydraulic multi-channel valve control system is one of the heart components of excavator, and the multi-channel valve body is its...

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