Casting primary standard processing method capable of balancing finishing allowance

Abstract

The invention relates to the field of complex casting processing, and particularly relates to a complex casting primary standard processing method. The casting primary standard processing method capable of balancing the finishing allowance comprises the following steps of: setting a standard casting, and ensuring the machining base level of the standard casting to be parallel with a main wallboard flat surface of a frame; placing the casting to be detected at an initial position in the frame, and detecting whether each detected element of the casting to be detected is qualified or not by virtue of a molded surface outline detection block on a detection device and normal finishing allowance detection mechanism and making a choice; and on the basis of taking the main wallboard flat surface of the frame as a standard, processing three round surfaces on the casting to be detected, and processing at least two basic holes which are perpendicular to the machining base level on the round surfaces. The processing method provided by the invention can be used for simultaneously detecting each detected element of the casting to be detected, directly obtaining the detection result, balancing the uniformity of the allowance of each part, requiring machining, of the casting to be detected, and saving the casting with a size defect; and when the processing method is applied to a high-priced large-scale complex casting, and the economic benefits are notable.

Description

technical field [0001] The invention relates to the field of complex casting processing, in particular to a complex casting preliminary datum processing method. Background technique [0002] Complex castings have the characteristics of poor repeatability, so they must be inspected before machining. Existing casting size inspection methods are roughly divided into three types: model inspection, three-coordinate measuring machine inspection and scribing inspection. Among them, the sample inspection is only suitable for simple castings, and generally only can detect two-dimensional dimensions, and cannot detect complex castings; while the three-coordinate measuring machine inspection is not suitable for batch inspection of castings, and it is difficult to clearly mark the machining reference points of castings, and most Processing enterprises do not have three-coordinate measuring machines. [0003] Among the existing detection methods, for complex castings, it is the most co...

AI Technical Summary

Problems solved by technology

Among them, the sample inspection is only suitable for simple castings, and generally only can detect two-dimensional dimensions, and cannot detect complex castings; while the three-coordinate measuring machine inspection is not suitable for batch inspection of castings, and it is difficult to clearly mark the machining reference points of castings, and most Processing enterprises without three coordinate measuring machines

[0003] Among the existing detection methods, for complex castings, it is the most commonly used and basic detection method to perform scribing detection with the help of platforms, supports and necessary tools, clamps, and measuring tools; , processed on related machine tools, the scribing detection of castings has high requirements on the skills of the fitter, and it is time-consuming. The authenticity of the detection results depends on the technology of the fitter, which is easy to misdetect and misjudgment, and the work efficiency is very low; at the same time, for For large and medium-sized complex castings, when the follow-up process adopts machining centers and other equipment for cutting processing, it is always expected that the machining allowance of each part to be processed is sufficient and relatively uniform, and the clamping and positioning datum is required to be accurate, but it is difficult to accurately process castings by scribing detection Machining standards cannot guarantee that the machining allowance of each machined part is uniform, and finally the processed unit in the complex casting is found to be insufficient in the machining allowance during subsequent machining, resulting in waste of machining hours in the early stage and product scrapping , the work efficiency is very low, which greatly increases the production cost

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