The high dimensional accuracy of precision casting lost wax mold can reduce the dimensional deviation of castings from the source, laying the foundation for improving the qualified rate of molding. The dimensional error of the precision casting lost wax mold cavity is strictly controlled within a small range. The outline of the precision casting lost wax mold can be accurately replicated during casting molding, avoiding the casting being too large or too small due to the inaccurate size of the precision casting lost wax mold itself. For example, for precision parts that require an aperture error within 0.01 mm, the precision casting lost wax mold with high dimensional accuracy can ensure that the aperture of the casting is always within the qualified range, reduce the situation where it is judged as scrap due to dimensional deviation, and directly improve the qualified rate.
The precision casting lost wax mold with high dimensional accuracy can ensure the dimensional stability of key parts of castings and reduce the unqualified rate of random inspections. The dimensional accuracy of key functional parts of castings, such as bearing holes and connecting grooves, directly affects their performance. If the dimensional accuracy of these parts of the precision casting lost wax mold is insufficient, the castings produced will have batch dimensional fluctuations. The high dimensional accuracy of the lost wax mold can keep the key parts of each batch of castings highly consistent, making it easier to pass strict standards in sampling inspections, reducing the quality risk of the entire batch of products caused by abnormal dimensions of individual castings, and indirectly improving the overall qualification rate.
The high dimensional accuracy of the precision casting lost wax mold can reduce the workload of the later trimming of castings and reduce the risk of scrapping during the trimming process. Castings with large dimensional deviations often require a lot of manual trimming, and improper operation may cause the castings to deform and crack during the trimming process, or they may still fail to meet the dimensional requirements after trimming and eventually be scrapped. The castings produced by the precision casting lost wax mold with high dimensional accuracy are close to the finished product requirements, and only require a small amount of grinding or no trimming, which reduces the waste generated by the trimming link and improves the molding qualification rate from the back end of the production process.
For castings with assembly requirements, the high dimensional accuracy of the precision casting lost wax mold can improve their assembly adaptability and reduce non-conformities caused by assembly problems. When assembling multiple castings, if the dimensional error of each part is large, there will be problems of too large or too small matching clearance, resulting in assembly failure. The high dimensional accuracy of precision casting lost wax mold can accurately match the matching dimensions of each casting, such as controlling the clearance between the shaft and the hole within the design range, so that the casting can be smoothly assembled without additional adjustment during assembly, avoiding being judged as unqualified due to assembly difficulties, and improving the practical qualification rate of castings.
Precision casting lost wax mold with high dimensional accuracy can reduce the risk of performance failure caused by dimensional problems of castings and improve the functional qualification rate. The size and performance of some castings are directly related. For example, excessive pitch error of gears will affect transmission accuracy, and thickness deviation of blades will lead to decreased aerodynamic performance. The high dimensional accuracy of lost wax precision casting lost wax mold ensures that these key dimensions meet the design standards, so that the castings can function normally, reduce the situation of being eliminated due to substandard performance, and make the qualification rate not only reflected in size, but also in actual use value.
The coordination of high dimensional accuracy and surface roughness of precision casting lost wax mold cavity can reduce the dimensional measurement error of castings and avoid misjudgment of unqualified castings. Precision casting lost wax molds with high dimensional accuracy usually have smoother surfaces, and the surface of the castings is also flatter after molding. When measuring, the measuring tool can fit well with the surface of the casting to obtain accurate dimensional data. If the surface of the precision casting lost wax mold is rough, resulting in uneven surface of the casting, reading deviation may occur during measurement, and qualified castings may be misjudged as unqualified. Castings produced by precision casting lost wax molds with high dimensional accuracy have more reliable measurement data, which reduces the false low pass rate caused by measurement errors and ensures that qualified castings are correctly identified.
Precision casting lost wax molds with high dimensional accuracy can improve the material utilization rate of castings and indirectly reduce the decline in pass rate caused by material waste. Castings with large dimensional deviations often need to reserve more machining allowances, and excessive machining allowances will increase material consumption. If internal defects are found in subsequent processing, more materials will be wasted. For castings produced by precision casting lost wax molds with high dimensional accuracy, the machining allowance can be controlled within the minimum range, the material can be more fully utilized, and at the same time, the probability of defect exposure caused by excessive machining allowances is reduced, thereby improving the effective pass rate of castings from the perspective of material utilization.
