Tin foil sealing gasket machining device and method

A processing device and processing method technology, applied in metal processing, etc., can solve problems such as no introduction, scratches on the surface of polyurethane rubber, etc., and achieve the effect of avoiding the formation of wrinkles

Active Publication Date: 2020-04-24
XIAN AERO ENGINE CONTROLS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this process, there are scratches on the surface of the polyurethane rubber (this is unavoidable) or there are foreign objects on the surface of the polyurethane rubber, which will leave defects such as bags and pits on the parts; The lead-tin alloy foil on the surface is also deformed under the action of friction. After punching, the polyurethane rubber returns to its original shape, but the lead-tin alloy foil cannot elastically recover, thus forming wrinkles on the surface.
The control of this defect has not been introduced in the technical data at home and abroad

Method used

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  • Tin foil sealing gasket machining device and method
  • Tin foil sealing gasket machining device and method

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Embodiment Construction

[0023] The present invention starts with figure 1 The processing process of the shown tin foil gasket is analyzed. The tin foil gasket is specially used for an aero-engine control system. It uses lead-tin alloy foil material, grade PbSn4.5~2.5, thickness 0.05mm, and is very soft, almost no rigidity . In the processing method in the prior art, the polyurethane rubber is deformed under pressure during the working process, causing the lead-tin alloy foil placed on the surface to deform under the action of friction, and the polyurethane rubber returns to its original shape after blanking. Pewter foils, however, cannot elastically recover and form wrinkles on the surface. Therefore, the present invention puts a layer of auxiliary material pad between the polyurethane rubber and the punched blank. This pad has certain rigidity and is easy to punch out, especially a 0.05mm thick aluminum foil pad. Adding this pad can not only avoid the impact of polyurethane rubber on the surface q...

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Abstract

The invention belongs to the field of machine manufacturing, and relates to a tin foil sealing gasket machining device and method. The machining device comprises an upper die, a forming punch-die, a polyurethane rubber gasket and a lower die, wherein the upper die, the forming punch-die, the polyurethane rubber gasket and the lower die are sequentially arranged from top to bottom. In addition, themachining device further comprises an aluminum foil pad arranged on the upper surface of the polyurethane rubber gasket. A blank to be punched is arranged between the forming punch-die and the aluminum foil pad. According to the machining method of the tin foil sealing gasket, a workpiece is blanked as soon as possible; the surface quality of the workpiece is ensured; and wrinkles are prevented from being formed on the workpiece appearance and the hole edge.

Description

technical field [0001] The invention belongs to the field of mechanical manufacturing, and relates to a processing method of a sealing gasket, in particular to a processing device and a processing method of an aviation tin foil sealing gasket. Background technique [0002] Tin foil gasket parts (such as figure 1 ) is one of the key parts in the aero-engine system, which has very high requirements on surface quality and is required to be able to reliably play a sealing role. The tin foil gasket is made of lead-tin alloy foil, grade PbSn4.5~2.5, the thickness is very thin, only 0.05mm, and it is very soft, with almost no rigidity, and it is easy to make defects such as folds, wrinkles, bags, and spots. Parts that meet the design requirements cannot be obtained by mechanical, electrical processing and conventional blanking methods. [0003] At present, only general-purpose polyurethane molds can be used for processing. First, place the foil to be processed on the polyurethane...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B26F1/40B26F1/44
CPCB26F1/40B26F1/44
Inventor 李杨王运平曹立林张飞刘文义马玲
Owner XIAN AERO ENGINE CONTROLS
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