In Precision Shaft Die Casting Processing, it is crucial to ensure the straightness of the shaft, which directly affects the quality and performance of the product. Here are some ways to achieve this goal.
First, mold design is the key. When designing a die-casting mold, the straightness requirements of the shaft should be fully considered. The cavity structure of the mold should be reasonable to ensure that the molten metal can be evenly filled during the die-casting process to avoid local unevenness. The guide mechanism of the mold should be precise and able to maintain a stable motion trajectory during the mold closing and opening process, providing accurate guidance for the forming of the shaft. For example, high-precision guide pins and guide sleeves can be used to reduce the fit clearance and improve the guiding accuracy.
Secondly, the control of die-casting process parameters is crucial. Parameters such as die-casting pressure, speed and temperature have a direct impact on the straightness of the shaft. Appropriate die-casting pressure can ensure that the molten metal fully fills the cavity, avoids defects such as looseness and pores, and thus ensures the density and uniformity of the shaft. The die casting speed should be moderate. Too fast speed may cause metal liquid splashing and turbulence, affecting the forming quality of the shaft; too slow speed may cause the temperature of the metal liquid to drop too fast, and the fluidity will deteriorate, which is also not conducive to the forming of the shaft. Temperature control is also very critical, including the pouring temperature of the metal liquid and the temperature of the mold. Too high or too low temperature may cause dimensional deviation and deformation of the shaft, affecting the straightness.
Furthermore, the post-processing process can also adjust and improve the straightness of the shaft. For example, a straightening process can be used to correct the bent shaft through mechanical force or thermal stress. During the straightening process, attention should be paid to controlling the force and temperature to avoid excessive straightening that causes stress concentration inside the shaft, affecting the strength and service life of the shaft. In addition, the straightness and surface quality of the shaft can be further improved through finishing processes such as grinding and honing.
In addition, the quality of the raw materials should not be ignored. Selecting high-quality die-casting materials to ensure that their composition is uniform and the impurity content is low can improve the fluidity and formability of the metal liquid, which is conducive to ensuring the straightness of the shaft. At the same time, the storage and handling of raw materials should be standardized to avoid contamination and oxidation of materials.
Finally, quality inspection is an important link to ensure the straightness of the shaft. Use advanced testing equipment and methods, such as three-coordinate measuring instruments, laser interferometers, etc., to accurately measure the straightness of the shaft. Timely discover and deal with products that do not meet the requirements to avoid defective products from entering the market.
In short, in Precision Shaft Die Casting Processing, through reasonable mold design, precise process parameter control, effective post-processing process, strict raw material management and perfect quality inspection, the straightness of the shaft can be effectively guaranteed and the quality and reliability of the product can be improved.
