Processing method of bolt head combination countersink drill

Abstract

The invention discloses a method for processing a bolt head combined dimple drill. The method comprises a grinding process, and the particular grinding process comprises the following steps: (1) coarsely grinding a tooth form by adopting a common universal grinder; (2) coarsely refining the tooth form by adopting a numerical control knife sharpener, uniformly grinding along the tooth form surface to uniformly reserve a 0.2mm margin on the tooth form surface outwards; (3) processing by adopting a numerical control optical curve grinder. By adopting the bolt head combined dimple drill, a mode of combining the common grinder and the numerical control optical curve grinder is adopted, so that the accuracy of a composition angle can be guaranteed, the tip size at the composite angle can be guaranteed, the accuracy of a surface to be processed can be guaranteed, and the production efficiency can be greatly improved.

Description

technical field [0001] The invention relates to a processing method of a bolt head combined countersink drill. Background technique [0002] With the rapid development of the aviation field, all-round improvement is required in the materials and mechanical properties of aircraft manufacturing, especially titanium alloy materials have been widely used in every link of aircraft parts processing, and titanium alloy materials are often processed Due to the characteristics of the processed materials, the processing characteristics of the tools used are determined. Different from the production of parts in other industries, the holes processed in the aviation field have high precision requirements, complex profiles, and large and small hole sizes. , the tools used are also of various types, and the processing difficulty is also relatively large. [0003] Such as figure 1 As shown, the bolt head combined countersink drilling is the processing of the compound angle formed by t...

AI Technical Summary

Problems solved by technology

[0003] like figure 1 As shown, the bolt head combined countersink drilling is the processing of the compound angle formed by two angles, and the two angles require high precision. At the intersection of the two angles, there are size requirements and high precision requirements, which is not easy to control. At the same time, the material to be processed is an alloy blade, which has high strength and is difficult to process

Usually, the conventional grinding machine is used to grind the second angle (89°) first, and then process the first angle (45°) from the second angle, so that the intersection of the two angles is at the theoretical intersection. The processing method needs to repeatedly check the size values ​​of the two angles, which greatly wastes the processing time. At the same time, the intersection point cannot be guaranteed to be a theoretical sharp point. Due to the shedding of the abrasive grains of the grinding wheel during the grinding process, it is difficult to control the intersection point. The size value of the product is lower, the product accuracy is reduced, and the rejection rate is extremely high

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