Large-diameter and high-precision taper hole processing method

Abstract

The invention discloses a large-diameter and high-precision taper hole processing method, which comprises the following steps: A, aligning and tightening two parts constituting a taper hole; B, linearly pre-drilling a bottom hole on a drilling machine; C, enlarging the diameter of the bottom hole to be the same as the minimum diameter of the small end of a finished product taper hole and ensuring the position precision of the hole, D, pre-processing the bottom hole into a stepped hole (steps at all stages of the stepped hole are equidistant in the axial direction and have the same increment in the radial direction), and E, reaming the bottom hole into the finished product. The invention can effectively prevent a reamer from being damaged due to unstable cutting; since all parts of the reamer are consistent in degree of wear and uniformly stressed, the taper hole precision can be ensured stably; meanwhile, the reamer axially feeds at a step depth of the stepped hole formed through pre-processing the bottom hole, so that the reaming efficiency is improved greatly.

Description

technical field [0001] The invention relates to the technical field of taper hole processing and manufacturing, and relates to a processing method for a large-diameter and high-precision taper hole. Background technique [0002] As our country develops into a big ocean country, for the shipbuilding industry, it also develops in the direction of large-scale to ensure the development of ships in the future. For the marine transmission system, it will inevitably develop in the direction of high power and high torque, and the connection between various transmission equipment will also increase with the increase of torque, and the connection of taper pin bolts is generally used. The use of taper pin connection between large equipment has the following advantages: 1. Positioning function. Taper pin positioning is better than direct pin positioning. It has high positioning accuracy, good maintainability, easy disassembly and assembly, and can meet multiple disassembly and assembly,...

AI Technical Summary

Problems solved by technology

Often the front of the reamer wears out first and cannot meet the design requirements, so the roughness of the taper hole processing is very poor and the efficiency is low

[0004] For large-diameter taper holes, the reamer is unstable because the contact surface is too small when it starts processing, and it is easy to break the reamer

Therefore, using the conventional processing method, the design requirements for the reamer are very high, especially the rigidity of the reamer and the wear resistance of the reamer are very high, which is often difficult to achieve, and only a few more reamers are used for processing.

However, due to the different degrees of wear of the reamer during processing, the surface roughness is difficult to meet the design requirements

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