A thin-wall metal bellows forming method based on shape memory polymer

A technology of memory polymer and metal bellows, which is applied in the field of pipe forming, can solve the problems of low production efficiency, complicated equipment, poor surface quality of formed parts, etc., and achieve the effect of improving surface quality, improving uniformity and preventing cracking

Active Publication Date: 2017-04-12
南京柔科航空设备科技有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of uneven wall thickness distribution of formed parts and easy cracking in local areas when using rigid molds at room temperature for stamping or thermal deformation when forming thin-walled metal bellows mentioned in the background technology, resulting in surface quality of formed parts. Poor, and the method of using rubber elements to form corrugated surfaces is relatively complicated, and the production efficiency is low. A thin-walled metal bellows forming method based on shape memory polymers is provided.

Method used

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  • A thin-wall metal bellows forming method based on shape memory polymer
  • A thin-wall metal bellows forming method based on shape memory polymer
  • A thin-wall metal bellows forming method based on shape memory polymer

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specific Embodiment approach 1

[0018] Specific implementation mode one: combine Figure 1~Figure 6 To illustrate, a shape memory polymer-based thin-walled metal bellows forming method in this embodiment is implemented in this way.

[0019] Step 1: Making a corrugated shape memory polymer 7: Making the outer contour of the shape memory polymer material with shape memory function into a corrugated shape consistent with the shape of the bellows to be formed.

[0020] Step 2: Make the forming die 1: first make the die blank, which is composed of two half-die blanks 2, and the two half-die blanks 2 are buckled and detachably connected; secondly, process on the inner wall of the die blank Corrugated ring cavity 3.

[0021] Step 3: Coating a release agent on the surface of the corrugated ring cavity 3 .

[0022] Step 4: Manufacturing the mandrel 5 : machining a counterbore on the central axis of one end face of the cylinder 4 and calling it the medium chamber 8 .

[0023] Step 5: Set the core mold 5 in the inne...

specific Embodiment approach 2

[0029] Specific embodiment 2: The thin-walled metal bellows finally produced in this embodiment has a number of corrugations N ranging from 3 to 40; the wall thickness is 0.2 mm to 0.5 mm, and the inner surface radius of the corrugated surface is 0.25 mm ~1.0mm. Other method steps are the same as those in the first embodiment.

specific Embodiment approach 3

[0030] Specific embodiment three: the release agents used in step three of this embodiment are all wax-free release agents. Other method steps are the same as those in the first or second embodiment.

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Abstract

The invention provides a method for forming a thin-wall metal bellows based on a shape memory polymer and relates to a thin-wall metal bellows forming method. The invention aims at solving the problems that wall thickness distribution of a formed part is uneven, a local region can be easily cracked, a forming device is complex and cost is relatively high when a steel die is used for carrying out stamping forming of a thin-wall metal bellows with relatively high material strength at room temperature. According to key points of the technical scheme, the method provided by the invention comprises the following steps: preparing a ripple shape memory polymer, making a forming die, making a core die to be assembled with the forming die, filling a medium bin with rubbery state shape memory polymer material, naturally cooling the shape memory polymer to room temperature, opening the die, and taking out the formed part. The method provided by the invention is applied to thin-wall metal bellows forming.

Description

technical field [0001] The invention relates to a thin-wall metal corrugated pipe forming method based on a shape memory polymer, and belongs to the technical field of pipe forming. Background technique [0002] Thin-walled metal bellows is a shell component with transverse corrugation and certain deflection, which is widely used in aerospace, petrochemical, automobile and ship, electrical instrumentation and other industrial fields. It mainly uses its own elastic deformation function. In addition to its elastic properties, it also has various properties such as corrosion resistance, impact resistance, high temperature resistance, and good sealing. It is a multifunctional component that can withstand external forces. Axial, angular, lateral and their combined displacements are generated. For thin-walled and ultra-thin-walled metal bellows with high strength, stamping or thermal deformation at room temperature is generally used at present. No matter which of the above formi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D15/10B21D15/06
CPCB21D15/06B21D15/105
Inventor 袁斌先房娃蔡玉俊
Owner 南京柔科航空设备科技有限公司
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