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

Patent metadata

Field	Value
Publication number	US-10245699-B2
Application number	US-201615325268-A
Country	US
Kind code	B2
Filing date	Jun 15, 2016
Priority date	Jun 16, 2015
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

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.

First claim

The invention claimed is:

1. A valve seat processing machine configured to process a valve seat in a valve device including a valve body portion which defines a flow passage of fluid and a valve drive portion which is detachably positioned on the valve body portion and which is configured to open and close the flow passage by driving a valve element capable of engaging with the valve seat in the valve body portion, the valve seat processing machine comprising:
a base portion configured to be attached to the valve body portion;
a main body portion on the base portion, the main body portion being movable relative to the base portion in two different axial directions;
a support portion on the main body portion, the support portion being movable relative to the main body portion in a drive direction of the valve element;
a main spindle on the support portion, the main spindle being rotatable relative to the support portion about an axis parallel to the drive direction of the valve element;
a tool holding device on the main spindle, the tool holding device being configured to hold a cutting tool for processing the valve seat, and being movable relative to the main spindle in a direction intersecting the drive direction of the valve element;
a controller configured to perform control of moving the support portion or the main spindle in the drive direction of the valve element and to perform control of moving the tool holding device relative to the main spindle in the direction intersecting the drive direction of the valve element; and
a ring member rotatably attached to an outer periphery of the main spindle and fixable to the valve body portion,
wherein the main body portion includes a pressing device for pressing the base portion to form a gap between the main body portion and the base portion from a state in which the main body portion and the base portion are in contact with each other.

2. The valve seat processing machine according to claim 1 , wherein the base portion has as many bolt insertion holes as existing bolt holes defined in the valve body portion, the bolt insertion holes being defined at a same pitch as the existing bolt holes.

3. A valve seat processing method of processing a valve seat in a valve device including a valve body portion which defines a flow passage of fluid and a valve drive portion which is detachably positioned on the valve body portion and which is configured to open and close the flow passage by driving a valve element capable of engaging with the valve seat in the valve body portion, the valve seat processing method comprising:
processing the valve seat into a shape corresponding to the valve element by removing the valve drive portion from the valve body portion;
attaching the valve seat processing machine according to claim 1 to the valve body portion;
attaching the cutting tool to the tool holding device;
moving the support portion in the drive direction of the valve element; and
moving the tool holding device in the direction intersecting the drive direction of the valve element.

Assignees

• Mitsubishi Hitachi Power Sys

Inventors

• Sugitani Daichi
• Matsumoto Takahiro

Classifications

• B23P6/00

  Restoring or reconditioning objects (straightening or restoring form of sheet metal, metal rods, metal tubes, metal profiles, or specific articles made therefrom B21D1/00, B21D3/00; repairing defective or damaged objects by casting techniques B22D19/10) · CPC title

• B24B15/04 Primary

  on valve members · CPC title

• B23C3/056

  for taps or valves · CPC title

• B23B41/12

  for forming working surfaces of cylinders, of bearings, e.g. in heads of driving rods, or of other engine parts · CPC title

• B23C2270/18

  Milling internal areas of components · CPC title