High precision machining method for double-head cross hole in bolt shaft

Abstract

The invention discloses a high precision machining method for a double-head cross hole in a bolt shaft The method comprises the following steps of (1) drill jig manufacturing: designing and manufacturing a pair of overturn cross hole drill jig with 90-degree overturn surfaces; (2) electric soldering iron reforming: reforming the heads of a pair of electric soldering iron to a positioning shaft; (3) drill jig positioning and clamping; (4) first time drilling: drilling one hole in the double-head cross hole in the bolt shaft by a drill bit separately; (5) electric soldering iron gapless positioning: separating the positioning shafts of the pair of electric soldering iron into drilled holes, separately, and connecting a power supply for thermal expansion gapless positioning; (6) drill jig overturning and clamping; and (7) second time drilling: drilling the other hole in the double-head cross hole by the drill bit, separately; and after drilling, unloading the electric soldering iron and the cross hole drill jig after the electric soldering iron is cooled. The method improves the machining precision of the double-head cross hole and is low in implementation cost.

Description

technical field [0001] The invention relates to the technical field of machining, in particular to a high-precision machining method for a double-headed cross hole on a bolt shaft. Background technique [0002] In shipbuilding and repairing production, it needs to be processed as attached figure 1 In the bolt shaft 1, the two ends of the bolt shaft are respectively provided with cross holes. There are three main requirements for the cross holes: one is that the cross holes themselves must be strictly perpendicular to each other and pass through the central axis of the bolt shaft; The cross holes at both ends are completely consistent in their circumferential positions along the axis of the bolt shaft. Third, the inner surface of the cross holes is required to have a higher quality. [0003] The processing of the cross hole of the bolt shaft was originally completed by drilling equipment or a boring machine under multiple clamping. However, the above-mentioned processing me...

AI Technical Summary

Problems solved by technology

However, the above processing methods often lead to the fact that the processing of the cross holes cannot pass through the center perpendicular to each other, the installation is not in place, and rework is often required, causing more quality problems

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