The typical specification characteristics of section steel universal edging roll and special-shaped steel s-roll products are that the roll neck at the operation end is slender. Because of the roll body processing pass, the semi steel material is generally selected. Affected by the semi steel material, the solidification and...
Riser is a kind of structure for storing liquid metal in the mold, which is used to compensate the possible shrinkage during the forming process of the casting and prevent the shrinkage cavity and porosity of the casting. According to the design principle of riser, the solidification time of...
Through the observation of the defects, it is found that the defects are shrinkage porosity and shrinkage cavity, which are concentrated in the final solidification part of the product and are caused by insufficient feeding of riser. ZHY casting uses electric heating riser to improve feeding efficiency. Electric heating...
Metal bending test is a test method to measure the bending plastic deformation ability of metal materials under bending load, which is one of the basic methods of material mechanical properties test. The bending test is mainly used to measure the bending strength of brittle and low plastic materials...
The working conditions of hydraulic turbine equipment are strict, and runner, as the core component of hydraulic turbine, has been listed in the national first set of major technical equipment promotion and Application guide directory. The runner of large hydraulic turbine is usually assembled and welded with upper crown,...
Scheme 1 According to the simulation results in Fig. 1 (E), the whole filling process takes about 19.6 s, which is basically consistent with the calculation results. It can be seen from 1 (a) that the transition zone of the ingate near the sprue is insufficient, and 1 (b),...
The gating system is the channel in the sand mold to guide the molten steel into the cavity. In the actual production, a series of casting defects are often caused by unreasonable design of gating system, which will lead to direct scrap of castings. Therefore, the design of gating...
The working conditions of hydraulic turbine equipment are strict, and runner, as the core component of hydraulic turbine, has been listed in the national first set of major technical equipment promotion and Application guide directory. The runner of large hydraulic turbine is usually assembled and welded with upper crown,...
Traditional measurement methods include manual measurement and large-scale three-dimensional scribing instrument, which have low measurement accuracy, high error rate, low efficiency and equipment can not be moved. At present, there are more and more types of large steel castings and their shapes are more and more complex, such as...
At present, the dimension measurement methods commonly used in large steel castings are traditional manual measurement, three-dimensional scriber and so on. Due to the poor measurement accuracy and low efficiency of the traditional three-dimensional scriber, it can not move on the fixed platform and has high requirements for the...