1) Determination of manufacturing process methods
Casting mechanism and its casting process analysis, the bearing seat
is used to clamp the bearing, so as to support the shaft and the parts
on the shaft.
The weight of the casting is about 10Kg
The part material is HT200
Outline size (215X80X146)mm
Production Program: Mass Production
2) Due to the small castings, the veil should be used.
3) Modeling method: molding, live block, two box model
4) Determination of parting surface
The
whole shape of the bearing seat is divided into two types, and wood is
used as the sand core of Φ62.5, and basically all on a plane, so the
entire shape of the bearing is selected as the parting surface, so that
the entire cavity is in the lower shape. Splitting also makes it easy to secure the riser.
5) Determination of position of pouring riser
The
casting is HT200, the volume shrinkage is small, but the casting is a
thick solid part, so pay attention to the occurrence of shrinkage
defects, so the location and direction of the introduction of the inner
runner is very important, according to the structural characteristics of
the casting, with the use of orientation The
principle of solidification, the inner runner should be introduced from
the two ends of the base, which can also prevent the sand type Φ62.5
punching, using the gauze against the gap, that can reduce the contact
between the gate and the casting section, It
can also avoid the overheating of the middle thick part, and can
shorten the solidification time, which is beneficial to obtain qualified
casting parts. In addition, because the blanking gate has a good
feeding effect, the casting part does not need to be provided with a
feeding riser in order to prevent the generation of blowholes. , You can set a Φ8-Φ10mm air outlet riser position at the top middle side of the edge.
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