Dean Machine Tools (formerly “Doosan Machine Tools”) in the machining of oilfield equipment components—specifically, valve body parts.

Machining of valve body components

　　The flanged straight-through three-way valve body is a commonly used structural configuration for gate valves, globe valves, check valves, pressure-reducing valves, and throttling valves. Valves of this design are widely manufactured and extensively applied across numerous industries.

　　Gate valve bodies are hollow, thin-walled shell components, typically in the form of a three‑way tubular structure, and are used in straight‑line piping systems. The inlet and outlet passages of this valve body are coaxial, which is why it is referred to as a straight‑through type (see the figure below).

　　Most of the valve body’s primary machined surfaces are cylindrical; therefore, with the exception of the guide‑rib areas, which are finished on a broaching or planing machine, all other surfaces are turned. Because the sealing surfaces demand high precision and surface finish, while the casting blanks have substantial machining allowances, the gate‑valve body can be processed in two stages: roughing and finishing. During roughing, the three flanges are first machined, after which the flanges serve as datums for precision turning of the sealing surfaces using an angled mandrel. Even after precision turning, the sealing surfaces still fail to meet the specified geometric accuracy and surface‑finish requirements, necessitating a final finishing operation—lapping.

　　 Dean Machine Tools (formerly “Doosan Machine Tools”) Application of the HM805 Horizontal Machining Center in Valve Body Machining:

　　Tianjin B Group Company is Beijing Smart technology Co.,ltd. Customers, in order to adapt to the evolving times, enhance production efficiency, and improve product quality, have introduced Dean Machine Tools (formerly “Doosan Machine Tools”) The HM805 horizontal machining center is used to machine valve bodies and other critical components, replacing traditional coordinate boring machines. The company utilizes… Dean Machine Tools (formerly “Doosan Machine Tools”) After adopting the HM805 horizontal machining center, single‑piece production has shifted from a multi‑process, multi‑station approach to a single‑process, single‑station method, significantly reducing labor and man-hours wasted during workpiece transfers between processes and stations, thereby increasing production efficiency severalfold. Workpiece machining accuracy is improved, leading to enhanced product assembly performance.

(Note: Beijing Smart technology Co.,ltd. Since the 1990s, we have been engaged in the sales and service of Dean Machine Tools (formerly “Doosan Machine Tools”). In 2008, annual machine tool sales exceeded 200 units, and by 2010 they surpassed 400 units. As of 2015, Shenming Technology’s cumulative sales of Dean Machine Tools (formerly “Doosan Machine Tools”) had already exceeded 7,000 units.

　　The Doosan machine tool HM805 it has introduced is a heavy-duty, high-rigidity horizontal machining center with full hard‑rail guideways, specifically designed for Chinese customers. Its high‑rigidity box‑type guideways deliver high torque, enhancing the machine’s overall heavy‑cutting capability and making it ideally suited for the precision machining of large, heavily loaded components in the oil‑field equipment sector.

　　HM805 Model Features:

　　- The ATC structure adopts a main‑body ATC design, reducing vibration and more effectively preventing tool loss during tool changes.

　　- In the APC structure, a bearing has been added between the worktable’s central axis and the piston, enhancing durability during the exchange process.