自动化纳米电刷镀技术及其在发动机连杆再制造中的应用

Automatic nano-brush plating technology and its application in remanufacturing connecting rods of engine

电刷镀技术是再制造的先进技术之一,已在实践中获得了应用,但其仍以手工操作为主要形式,存在工艺过程受操作人员的经验影响大,镀层质量不稳定、效率低和劳动强度大等缺点,阻碍了其进一步发展。鉴于此,我们开发了自动化纳米电刷镀技术并研制了相关设备。试验表明,应用自动化电刷镀设备制备的Ni/n–Al2O3复合镀层,与手工刷镀制备的相应镀层比较,组织更均匀、致密,晶粒细小,硬度更高,耐磨性更好。该技术已成功应用于发动机连杆再制造,镀层质量稳定可靠、生产效率大幅度提高。

Brush plating is one of the advanced technologies for remanufacturing and has found wide application in engineering. There exist many problems such as unstable deposit quality,low labor productivity and high labor intensity with the traditional manual brush plating technology due to the introduction of operator’s experience. Therefore,an automatic nano-brush plating system was developed and used to prepare Ni/n–Al2O3 composite coatings. The results show that the automatically plated coatings are relatively dense and uniform and have smaller crystalline size,higher microhardness and better anti-wear property when compared with manually plated coatings. This technology has been successfully employed to remanufacture connecting rods of engine. Stable deposit quality is obtained and labor productivity is greatly improved.