Fixtures for processing gate valve body

Abstract

The invention discloses a work fixture used for machining gate valve bodies. The work fixture comprises a rotary tray used for fixing a valve body base and a cover plate used for pressing and applying clamping force to a flange in one valve body; the rotary tray is arranged on a baseplate which is arranged on a fixing platform; a column used for supporting the cover plate is arranged on the fixing platform, and the cover plate is detachably connected with the column; the cover plate comprises a cross bar fixedly connected with the column and an adjustable pressure head used for fixing the flange in the valve body and perpendicular to the cross bar; the adjustable pressure head comprises a hollow cylinder, a vertical adjusting rod mounted in the hollow cylinder and at least one expandable arm connected with the adjusting rod, and guide grooves allowing the expandable arms to expand out are arranged in the axial wall of the hollow cylinder. The work fixture is compact in structure, convenient to mount and dismount and safe and reliable, multi-part machining of the valve body can be completed by one-step clamping, machining efficiency is improved highly, machining error is reduced, consistency in machining is guaranteed, and machining quality is ensured; the work fixture is further applicable to gate valve bodies different in size and beneficial to mass production.

Description

technical field [0001] The invention relates to a tooling fixture, in particular to a tooling fixture for processing a gate valve body, and belongs to the technical field of gate valve body processing equipment. Background technique [0002] The sealing effect of the valve is an important indicator to measure the quality of the valve. Ordinary valves generally use a lathe to turn the sealing surface, and then seal it with a soft sealing ring. The sealing effect of this type of valve mainly depends on the sealing ring, which is easy to use for a long time. Leakage, short service life and low reliability. [0003] The existing hard-sealed valve has high reliability and long service life. After the sealing surface of this type of valve is turned, it is necessary to grind the sealing surface to make the valve sealing surface achieve higher flatness and roughness, so that a better sealing effect can be achieved without using a sealing ring. In order to ensure the tightness of t...

AI Technical Summary

Problems solved by technology

This kind of processing method is not only cumbersome and difficult to clamp; moreover, multiple clamping operations and step-by-step processing of the sealing surface make it difficult to guarantee the consistency of the shape tolerance and dimensional tolerance of the processed sealing surface, and the effect is not good and The process of changing fixtures is also time consuming and can lead to overall inefficiency in the operation

In addition, for gate valve bodies of different sizes, fixtures of different sizes need to be produced, which has poor universal performance and increases the manufacturing cost of the fixtures. In addition, it is necessary to adjust the error when disassembling and assembling different fixtures for re-clamping and processing, and there is a problem of low processing efficiency.

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