The DHF8000 and PUMA VTR series products are used in casing machining.

The DHF8000 and PUMA VTR series products are used in casing machining.

  As one of the critical components of an aircraft engine, the engine case is classified into split-ring, monolithic ring, and irregular‑shaped configurations; its structure is complex and manufacturing is highly challenging. The materials typically used for engine cases are high‑temperature‑resistant, difficult‑to‑machine nickel‑based superalloys and titanium alloys. Due to their thin walls and low structural rigidity, coupled with intricate surface geometries and stringent dimensional tolerances, these components present significant machining difficulties. Beijing Shinming Technology Co., Ltd. employs South Korea’s DN PUMA VTR series ram‑type vertical turning centers and the DHF8000 swing‑spindle five‑axis horizontal machining center to process engine cases from raw blanks through to finished parts.

  An aircraft engine with a thrust of 15,000 kg has a casing diameter of approximately φ800 mm and a wall thickness of 3 mm at its thinnest point. Consequently, machining this casing requires medium- to large‑size, multi‑function, high‑precision CNC machine tools.

  In casing machining, from the raw blank to the finished product, approximately 70% of the material is removed. Beijing Smart technology Co.,ltd. employs the Korean DN’s ram-type vertical turning center, the PUMA VTR series. With its highly rigid design and wide-column structure, high-strength chromium-molybdenum alloy steel ram, long-stroke configuration for enhanced machining flexibility, ram tool indexing system, and ATC, among other structural features, the VTR series turning centers provide an excellent turning solution for casing machining.

 

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  The DHF8000 swing‑type spindle, five‑axis horizontal machining center was selected. Its X/Y axes feature a dual ball‑screw configuration, grating scale feedback, spindle and structural thermal compensation, and screw‑center cooling—ensuring high machining accuracy. The rigid gear‑driven spindle head delivers up to 960 N·m of torque, or alternatively offers high‑speed electric spindles rated at 15,000 r/min or 30,000 r/min, accommodating diverse machining requirements. An optional turning‑type rotary table (DHF8000ST, up to 500 r/min) further supports process versatility. These features streamline the casing‑part manufacturing workflow, not only guaranteeing dimensional accuracy but also enhancing machining productivity.