As a core aluminum die‑cast component of the automotive cooling system, the automobile water pump housing features densely‑arranged internal oil passages, blind holes, intersecting holes and threaded structures. After CNC machining, aluminum chips, cutting fluids and machining burrs tend to remain inside hole walls. Poor cleaning will lead to oil circuit blockage, seal failure and internal impeller wear after assembly, directly threatening the reliability of the whole‑vehicle cooling system. It is also a key item for strict cleanliness control of OEMs. Conventional manual deburring, ordinary spray cleaning and ultrasonic cleaning can hardly remove micro‑burrs at intersecting hole positions. These processes suffer from incomplete cleaning, unstable quality and low efficiency, failing to meet the VDA19 particle inspection standard of Volkswagen and restricting mass delivery.

Integrating multi‑axis CNC motion system and high‑pressure water jet technology, the Sinobakr CNC high‑pressure cleaning solution provides a complete set of processes including deburring, cleaning, rinsing and drying for VW water pump housings. All procedures can be finished on one single machine without cross‑station transfer. Controlled by CNC programs, multi‑axis linkage drives high‑pressure water jets to follow the 3‑D contour of water pump housings precisely. Multi‑angle water jets reach deep into intersecting oil passages, blind holes and thread roots. The non‑contact water impact strips off machining burrs and embedded aluminum chips without scratching the aluminum die‑cast surface or causing workpiece deformation, eliminating blind zones in traditional inner‑cavity cleaning.

Equipped with a variable‑frequency high‑pressure boosting unit, the system allows flexible pressure adjustment for thin‑walled aluminum alloy parts. Multi‑stage precision filtration and magnetic chip‑removal devices separate aluminum chips and oil contaminants. Cleaning fluid can be recycled to cut water consumption and operating costs. Subsequent pure‑water rinsing and enclosed hot‑air drying deliver fully clean and dry workpieces, whose particle residues satisfy the cleanliness requirements for Volkswagen OEM assembly and effectively prevent potential assembly failures.

The solution delivers outstanding flexibility. Modular‑stored cleaning programs for water pump housings can be recalled directly for product changeover. Combined with quick‑change fixtures, it supports fast switching among different housing models for mixed‑line mass production. With fully enclosed chamber design, the machine generates no dust or chemical volatiles to improve workshop conditions. Fully‑automatic operation reduces manual deburring work‑posts and human‑induced quality fluctuations, ensuring consistent batch quality. It helps component manufacturers steadily pass Volkswagen supplier audits and achieve production goals of quality improvement and cost reduction.