Mitsubishi Hitachi Power Systems, Ltd.

Daichi Sugitani

Daisuke Sasaki

Takahiro Matsumoto

Masaru Kamada

Nobuchika Suezawa

Takayoshi Ohara

Tatsuya Iwasawa

Yu Wakamatsu

Shigenori Taniguchi

Kiyoshi Kanemitsu

Naoki Sakamoto

Genta Terada

Tetsuhide Nakao

Koji Oyama

A valve seat processing machine configured to process a valve seat in a valve device including a valve body portion which forms a flow passage of fluid and a valve drive portion which drives a valve element capable of tightly engaging with the valve seat includes: a base portion attached to the valve body portion; a main body portion movable relative to the base portion; a support portion movable relative to the main body portion in a drive direction of the valve element; a main spindle rotatable relative to the support portion about an axis parallel to the drive direction of the valve element; a tool holder configured to hold a tool for processing the valve seat and movable relative to the main spindle in a direction intersecting the drive direction of the valve element; and a controller configured to control movement of the support portion and the tool holder.

Valve seat machining device, and valve seat machining method using said valve seat machining device

A valve seat processing machine () configured to process a valve seat () in a valve device () including a valve body portion () which forms a flow passage of fluid and a valve drive portion () which drives a valve element () capable of tightly engaging with the valve seat () in the valve body portion () includes: a base portion () attached to the valve body portion (); a main body portion () movable relative to the base portion () in two different axial directions; a support portion () movable relative to the main body portion () in a drive direction of the valve element (); a main spindle () rotatable relative to the support portion () about an axis parallel to the drive direction of the valve element (); and a tool holder () configured to hold a tool (T) for processing the valve seat ().

A radial pinhas a second end portionB protruded from an outer surface of a turbine casingand a first end portionA inserted into a through holeformed in the turbine casing, and a weld beadis formed on a periphery of the second end portionB. A weld bead cutting devicehas a cutting portionwhich cuts the weld beadformed on the periphery of the radial pin, and a support portionwhich supports the cutting portionon an end surfaceC of the second end portionB of the radial pinsuch that the cutting portionis movable along the periphery of the radial pin

Weld bead cutting device

Growing community of inventors

Kanagawa, Japan

Daichi Sugitani