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Machining method of metal sealing sleeves

A metal sealing sleeve and processing method technology, applied to other household appliances, household appliances, applications, etc., can solve the problems of low qualified rate of finished products, low material utilization rate, low forming accuracy, etc., and achieve good mechanical properties and fewer processing steps. , The effect of high forming accuracy

Active Publication Date: 2017-01-11
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the traditional machining process has the disadvantages of low forming precision, low material utilization rate, low efficiency, and low yield rate. In this way, the processing cost of the metal sealing sleeve is too high, and the qualified rate of the finished product is low, which cannot meet the needs of metal sealing sleeves in oil wells. massive demand for

Method used

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  • Machining method of metal sealing sleeves
  • Machining method of metal sealing sleeves
  • Machining method of metal sealing sleeves

Examples

Experimental program
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Effect test

Embodiment 1

[0032] In this embodiment, the steps of preparing the metal sealing sleeve are as follows:

[0033] Step 1, use the high-speed hot extrusion process to make the tube billet

[0034] Such as figure 2 As shown, the billet whose temperature is higher than the recrystallization temperature of the material is placed in an airtight container composed of an extrusion cylinder 7, an extrusion die 8 and an extrusion rod 4, and the extrusion rod 4 is in the extrusion cylinder 7 together with the extrusion die 8 Correspondingly, an extruding cushion 6 is provided at one end of the extruding rod 4 corresponding to the extruding die 8 , and a mandrel 5 is arranged at the center of the extruding rod 4 . The extrusion force applied by the extrusion rod 4 forces the metal to flow out from the hole of the extrusion die 8, thereby obtaining the tube blank 1 of the metal sealing sleeve. The raw material used in this production method is 316L stainless steel tube billet, the deformation temper...

Embodiment 2

[0040] In this embodiment, the steps of preparing the metal sealing sleeve are as follows:

[0041] Step 1, using high-speed hot extrusion to make a billet, the process flow is the same as step 1 in Example 1, the raw material of the tube billet is a nickel-titanium alloy tube billet, the hot extrusion temperature is 900 ° C, the extrusion speed is 100 mm / s, and the mold type The cavity height is 50mm, and the cavity profile adopts the curved shape expressed in space by the three-dimensional cubic equation.

[0042] Step 2, use the cross wedge rolling process to process the outer contour of the sealing sleeve, the process flow is the same as step 2 in Example 1, the rolling speed is 10mm / s, the rolling temperature is 850°C, the forming angle is 40°, and the width is widened. The angle is 6°, and the reduction of area is 40%.

[0043]Step 3, using the hydraulic bulging process to process the arc-shaped thin wall of the sealing sleeve, the process flow is the same as step 3 in ...

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Abstract

The invention belongs to the field of machining techniques for metal thin-wall parts for gyrorotors with complex sections, and particularly relates to a machining method of metal sealing sleeves. Firstly, a blank is made by adopting a high-speed hot extrusion technique, then the external outline portion of a gyrorotor part is made through cross wedge rolling extrusion, and finally the molding requirement of the thin-wall portion is ensured through a hydro-bugling technique, specifically, through adoption of the high-speed hot extrusion technique and the cross wedge rolling technique, the deformation capacity of metal can be improved, the surface quality of the product is higher, and the mechanical property is better. Compared with traditional techniques, both the efficiency and product quality are improved. Besides, compared with a common machining technique, the hydro-bugling technique has the advantages that the number of machining procedures is small, the molding precision is high, materials are saved, and the mechanical property of parts is good.

Description

technical field [0001] The invention belongs to the field of processing technology of thin-walled metal parts of complex section revolving bodies, in particular to a processing method of a metal sealing sleeve. Background technique [0002] With the increasing consumption of oil, the recoverable amount of shallow oil is getting less and less, so the current trend is to increase the mining depth, but as the mining depth increases, the working conditions in the well become more and more serious. It is more and more harsh, every time the depth increases by 100m, the temperature increases by 3°C, and the pressure also increases. Therefore, rubber as a non-metallic sealing material is more likely to be damaged, and it is directly related to the success or failure of a well's oil production. [0003] For this reason, an alternative technology as a metal seal is becoming more and more urgent. against figure 1 For the shape of the metal sealing sleeve shown, the traditional machin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D35/00B21D51/00
Inventor 张士宏宋鸿武金平陈岩尚晓峰程明
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI