Explain the roundness and slope of precision castings for rotary joints

1. Rotary Joint Casting Fillet Rotary Joints Pressure castings shall have round corners on the inner and outer surfaces of the walls and walls. These are known as casting fillets, in which precision casting fillets have the following functions.
1. The life of the mold can be prolonged, and the acute angle on the casting can easily damage the mold, cause the corners of the core to collapse, and cracks occur at the included angle in the cavity.
2. The corner radius should not be too large. Excessively large radii can cause "hot knots" at the junction.
3. It is helpful for the transfer of pressure and the flow of molten metal, reducing the turbulent envelope gas and facilitating the formation. At the same time, the casting can avoid stress concentration and cracks appearing at acute angles and improve the strength of precision casting products.
Second, the rotary joint casting slope Casting slope, also known as stripping slope, the size of the rotary casting precision casting slope with the type of alloy, casting wall thickness, height or depth. The die casting structure must take into account sufficient precision casting tilt to facilitate smooth casting of the casting. The generally specified casting slope is: the inner side of the fertilizer-specific pipe is larger than the outer side; the thick-walled one is larger than the thin-walled one; the high-melting point alloy is larger than the low-melting point alloy.
Casting slopes are generally not included in the tolerance range. When setting the precision casting inclination, the surface is not machined, and the hole is based on the small end; the shaft is based on the big end; the surface to be machined is based on the big end, and the shaft is based on the small end.