Repair method of chrome plating on the inner surface of the rear axle journal

Abstract

The invention provides a chromium plating repair method and a chromium plating repair clamp for an inner circle surface of a rear journal. The inner circle surface needing chromium plating repair is formed in the middle of the rear journal; an upper inner circle surface and a lower inner circle surface are adjacent to the inner circular surface, the upper inner circle surface is positioned on the upper surface of the inner circle surface, and the lower inner circle surface is positioned on the lower surface of the inner circular surface; the chromium plating repair clamp comprises an upper screen board and a lower screen board; the upper screen board is matched with the upper inner circle surface in size and made of plastics; the lower screen board is matched with the lower inner circle surface in size and made of plastics; a center through hole for an anode bar to pass is formed in the upper screen board; a center blind hole through which the bottom of the lower screen board can be propped against the anode bar is formed in the lower screen board. The chromium plating repair clamp provided by the invention can be used for firmly fixing the rear journal to avoid non-uniform thickness of a clad layer due to position variation of the rear journal, and meanwhile, the chromium plating repair clamp is used for very conveniently and quickly covering and protecting parts which need not to be repaired through chromium plating, so that protection workloads such as painting and lead sheath sticking are reduced, the working efficiency is improved, and the repair cycle is shortened.

Description

technical field [0001] The invention relates to a chrome-plating repair method and a fixture after the size of an aero-engine component is out of tolerance during processing, relates to a local chrome-plated protection tooling structure and a chrome-plated technology for stainless steel parts, and in particular to a chrome-plating technology used in the rear journal of an aero-engine Repair method and fixture of round chrome plating. Background technique [0002] The rear journal is an important part to ensure the safe and stable operation of the aero-engine. figure 1 It shows a three-dimensional structural diagram of the rear journal of an aero-engine. In order to meet the high-strength and lightweight design requirements in the aviation field, the rear journal is mostly made of stainless steel. figure 1 The shown rear journal is a kind of disk shaft part with complex shape and structure and thin wall thickness. Big, and a waste of processing time. [0003] It is a commo...

AI Technical Summary

Problems solved by technology

However, the usual protection methods such as painting and lead sheeting are a lot of work. Since the area to be protected is much larger than the outer circular surface that needs to be repaired by chrome plating, the chrome plating repair cycle of the rear journal is greatly prolonged, and the efficiency is very low. High cost

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