Locating and turning fixture for large end face and shaft hole of valve deck of stop valve

A large end face, positioning car technology, applied in the field of machining fixtures, can solve problems such as difficulty in meeting design requirements, and achieve the effects of reducing auxiliary man-hours, easy production, and high production efficiency

Inactive Publication Date: 2014-03-26
JIANGSU ZHONGHAO MARINE VALVE MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly aims at the problem in the prior art that it is difficult to meet the design requirements for turning the bonnet separately by using two special fixtures, and proposes a large end face and shaft hole positioning car fixture for the stop valve bonnet with simple structure, accurate positioning and reliable connection.

Method used

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  • Locating and turning fixture for large end face and shaft hole of valve deck of stop valve
  • Locating and turning fixture for large end face and shaft hole of valve deck of stop valve

Examples

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Embodiment Construction

[0013] The present invention will be further described below according to the accompanying drawings and in conjunction with the embodiments.

[0014] figure 1 The shown cut-off valve bonnet big end face and shaft hole positioning vehicle fixture, it is made up of clamp body 1, bolt 2 and pressure plate 3. The clamp body 1 is a double-layer conjoined disc frame with an inner hollow structure, and the left disc has an external end face seam 1.1, which is the positioning reference of the clamp body 1, and it is matched with the connecting plate of the supporting lathe. Co-located connections. There is a cross-shaped through hole 1.2 and a coaxial step hole 1.3 in the center of the end face of the right disc. The step hole 1.3 is the installation reference of the bonnet 4 to be processed, and the outer circle of the large end surface of the bonnet 4 to be processed is in clearance fit with the step hole 1.3. . The bolt 2 is installed on the inner end surface of the left disc, a...

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Abstract

The invention discloses a locating and turning fixture for a large end face and a shaft hole of a valve deck of a stop valve. The locating and turning fixture is composed of a fixture body, a bolt and a pressing plate. An end face retaining opening is formed in the outer side of a left disk of the fixture body. The middle portion of the end face of a right disk is provided with a cross-shaped through hole and an external step hole, wherein the outer circle of thea large end face of the valve deck to be machined is in clearance fit with the step hole. The bolt is installed on the inner end face of the left disk. The bolt and the pressing plate are matched and pressed at the edge, where a screw hole is formed, of the valve deck to be machined to form an axial locking structure. The locating and turning fixture conducts clamping under the locating condition, turning of the large end face and the screw hole of the valve deck can be completed in one step, the subsidiary time is short, and production efficiency is high. Above all, turning is conducted under the same locating datum condition, a locating error is set, and the positional accuracy of a turned product meets the design requirement easily.

Description

technical field [0001] The invention relates to a machining fixture, in particular, the invention relates to a large end face of a valve cover and a shaft hole positioning vehicle fixture for a globe valve. Background technique [0002] The bonnet of the stop valve is a T-shaped member, the screw hole on the top is perpendicular to the large end surface of the bottom, and the two are connected by side ribs. The large end face of the valve cover is matched with the top hole of the valve body, and the valve rod installed in the screw hole penetrates downward through the large end face of the bottom to form a spiral lifting mechanism for controlling the valve switch. The vertical accuracy of the screw hole relative to the large end surface determines the flexibility and sealing performance of the screw lifting mechanism. Due to the special shape of the bonnet, general-purpose fixtures are not suitable for clamping. In this industry, special fixtures are usually designed to mac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q3/00
CPCB23Q3/12
Inventor 李顺明李志龙
Owner JIANGSU ZHONGHAO MARINE VALVE MFG
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