Machining method for stainless steel seal rings in large valves

A processing method and stainless steel technology, applied in metal processing equipment, manufacturing tools, turning equipment, etc., can solve the problems of large diameter, deformation, strict technical requirements, etc., and achieve the effect of low deformation probability

Active Publication Date: 2014-05-14
浙江坤博精工科技股份有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The characteristics of the stainless steel sealing ring on this large valve are: large diameter, generally the wall thickness of the sealing ring of the outer circle of Ф949 is only 24.9, and screw holes must be drilled on the outer circle, but the technical requirements are strict, and the flatness generally needs to reach 0.1. When the workpiece is processed by the processing method, it is scrapped due to deformation due to various reasons

Method used

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  • Machining method for stainless steel seal rings in large valves

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Embodiment Construction

[0029] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0030] Such as figure 1 As shown, this processing method is suitable for stainless steel sealing rings in large valves, and the method includes the following steps:

[0031] Step 1. Rough machining of the outer circle 1: Place the workpiece on the lathe, clamp the workpiece with a three-jaw chuck, and leave a unilateral margin of 1.2-1.8mm for the outer circle of the rough car; as an optimal solution, the rough car in step 1 The unilateral margin left by the outer circle is preferably 1.5mm;

[0032] Step 2, bottom surface finishing 2: keep the clamping of the workpiece on the lathe unchanged, and finish the outer end surface of the workpiece;

[0033] Step 3, aging treatment 1 3: remove the workpiece from the lathe, and...

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Abstract

The invention provides a machining method for stainless steel seal rings in large valves, belongs to the technical field of machining, and solves the technical problem in the prior art that the scrapping rate is higher due to deformation during machining process. The machining method for seal rings comprises the following steps: step 1, outer circle coarse machining; step 2, bottom surface fine machining; step 3, ageing treatment 1; step 4, inner circle fine machining; step 5, top surface coarse machining; step 6, outer circle fine machining; step 7, ageing treatment 2; and step 8, top surface fine machining. Seal rings made with the machining method provided by the invention have flatness of 0.05 mm to 0.1 mm, and can meet the precision requirements of valve sealing. The seal rings made through the machining method are cut three times in top surface fine turning and outer circle fine turning, so that workpieces have a low probability of deformation and are not easy to be scrapped.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing and relates to a processing method for a stainless steel sealing ring in a large valve. Background technique [0002] The valve is a control component in the fluid delivery system, which has functions such as cut-off, adjustment, flow diversion, reverse flow prevention, pressure stabilization, flow diversion or overflow pressure relief. Valves used in fluid control systems range from the simplest cut-off valves to various valves used in extremely complex automatic control systems, with a wide variety of varieties and specifications. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. [0003] The sealing ring is a kind of mechanical seal, and the mechanical seal is an oil seal device of a rotating machine. Such as centrifugal pumps, centrifuges, reactors and compressors a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23B5/00
Inventor 厉全明吕建初罗鑫磊
Owner 浙江坤博精工科技股份有限公司
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