Cause analysis and optimization measures of defects in sand casting coupling parts
1. Cause analysis After preliminary analysis, it is concluded that the main problem in the simulation results of tooling gating […]
1. Cause analysis After preliminary analysis, it is concluded that the main problem in the simulation results of tooling gating […]
The defects of billet continuous casting mainly include surface defect reconnection, inclusion and scar, scratch and vibration mark. The internal
In order to verify the casting quality effect after process optimization, the trial production of 5 wheel hub steel castings
The root cause of exposed defects after tooth milling is that the internal defects after rough machining are not treated
1. Manifestation of slag inclusion defect Slag inclusion defects are formed by the slag remaining in the weld during welding.
In order to ensure the quality of wheel hub steel castings, the process scheme is optimized, and 14 65 mm
ProCAST software is used to simulate and calculate the scheme before process optimization of wheel hub steel casting. The judgment
1. Meshing of process modeling Using 3D modeling software creo2 0 carry out three-dimensional solid casting process modeling for castings.
Wheel hub steel casting is one of the important structural parts of the traction system of a crawler vehicle. The
In recent years, in order to improve the level of digital manufacturing technology in the traditional casting industry, a lot
By replacing the #3 riser with #5 riser, the height difference between riser and gray cast iron is increased from
1.Improvement plan The existing tooling has been put into production, and the bottom injection process cannot be changed. Therefore, the
Through testing, the actual chemical composition of molten iron is: w (c) 3.35%, w (SI) 2.14%, w (MN) 0.77%, w
The connection opening of V-type engine body goes deep into the core, and the heat dissipation is slow. Compared with
1. Defect distribution characteristics A total of 188 castings were produced, and the semi-finished products could not be identified by
A certain type of gray cast iron brake drum produced by ZHY casting has a casting weight of 6kg, a
In order to facilitate statistics, the location of crack casting defects is numbered and marked according to figure 1. Table
Crack is one of the most dangerous casting defects of engine gray cast iron. Undetected cracks will expand and extend
The judgment of multiple hot spots is to judge the number, size and position of hot spots that may be
In the production of steel castings, the most common casting defects are shrinkage cavity and porosity. The main purpose of
The shrinkage porosity produced in the solidification process of castings is mainly predicted by using the shrinkage porosity criterion. There
To calculate the shrinkage of an isolated hot spot, first determine the isolated region, and then use the formula to
Niyama criterion is selected as the prediction method of shrinkage porosity of spiral bevel gear casting. As shown in figures
The figure is the schematic diagram of shrinkage defects and air pressure distribution at different positions after complete solidification of
1.Casting Porosity Casting porosity is a common defect that can occur during the casting process in manufacturing. It refers to
The prediction criteria of shrinkage porosity and shrinkage cavity of iron castings have been studied and developed for many years,
Shrinkage cavity and porosity are shrinkage casting defects produced in the solidification process of nodular cast iron. The solidification characteristics
The prediction of shrinkage casting defects is based on the simulation of temperature field, and then the shrinkage of sand
To calculate the shrinkage of an isolated hot spot, first determine the isolated region, and then use the formula to
The judgment of multiple hot spots is to judge the number, size and position of hot spots that may be