Plank soft mode forming device and method based on magnetorheological elastomers

A magnetorheological elastomer and elastomer technology, which is applied in the field of sheet-type soft mold forming devices, can solve problems such as inability to change rubber properties, and achieve the effects of improving the forming limit, optimizing the control of deformation flow, and improving the forming quality.

Active Publication Date: 2013-09-04
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the properties of the rubber cannot be changed in the existing...

Method used

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  • Plank soft mode forming device and method based on magnetorheological elastomers
  • Plank soft mode forming device and method based on magnetorheological elastomers
  • Plank soft mode forming device and method based on magnetorheological elastomers

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specific Embodiment approach 1

[0021] Specific implementation mode one: combine figure 1 Describe this embodiment, this embodiment comprises plunger 1, coil 2, container frame 3, magnetorheological elastomer 4 and die 5, and the upper end surface of described die 5 is provided with die cavity 5-1, container frame 3 and the concave mold 5 are set up and down, the container frame 3 is set on the outside of the plunger 1, and the head of the plunger 1 is located in the inner cavity of the container frame 3, and the magnetorheological elastomer 4 is filled in the plunger 1 In the cavity formed by the lower surface and the inner wall of the container frame 3 , the coil 2 is set on the outer wall of the container frame 3 and the die 5 .

specific Embodiment approach 2

[0022] Specific implementation mode two: combination figure 1 To illustrate this embodiment, the plunger 1, the container frame 3 and the die 5 of this embodiment are all made of non-magnetic steel or austenitic stainless steel. Both non-magnetic steel and austenitic stainless steel can make the magnetic force line fully pass through the magnetorheological elastomer, so that the magnetic field distribution in the working area is more uniform. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0023] Specific implementation mode three: combination Figure 1 ~ Figure 4 Describe this implementation mode, this implementation mode is realized through the following steps:

[0024] Step 1. Place the plate 6 to be formed between the lower surface of the container frame 3 and the upper surface of the die 5, and clamp the plate 6 to be formed; the plate 6 to be formed can be clamped by means such as a lock or a hydraulic press ;

[0025] Step 2. Determine the magnetic field strength B in the working area according to the shape of the plate 6 to be formed and the elastic modulus of the magnetorheological elastomer 4 required at each stage of forming,

[0026] B≈μ 0 n

[0027] where μ 0 ——vacuum magnetic permeability, n——coil turns per unit length, I——current,

[0028] The magnetic field strength B cannot exceed the magnetic saturation strength of the magnetorheological elastomer;

[0029] Step 3: Connect the coil 2 to a DC power supply, and change the magnetic field str...

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Abstract

The invention peovides a plank soft mode forming device and method based on magnetorheological elastomers, relates to a plank soft mode forming device and method, and solves the problem that the rubber performance of the conventional rubber soft mode can not be changed during forming process. The device provided by the invention is characterized in that a holding frame is arranged opposite to a die in an up and down manner, the head of a plunger piston is positioned in the inner cavity of the holding frame, the lower surface of the plunger piston is filled with a magnetorheological elastomer, and the outer sidewalls of the holding frame and the die are sleeved and mounted with coils. The method provided by the invention comprises the following steps: firstly, placing the to-be-formed plank between the lower surface of the holding frame and the die; secondly, determining the magnetic field strength B in work area according to the shape of the to-be-formed plank and the size of the elastic modulus of magnetorheological elastomer needed at each stage in forming; thirdly, connecting the coil with a direct current, enabling the magnetic field strength of the magnetorheological elastomer area to be changed by adjusting the current, and enabling the to-be-formed plank to form the needed shape under proper elasticity modulus of the magnetorheological elastomer; and fourthly, taking out the formed parts. The method provided by the invention is used for plank soft mode forming.

Description

technical field [0001] The invention relates to a sheet material soft mold forming device and method, in particular to a sheet material soft mold forming device and method based on a magnetorheological elastomer. Background technique [0002] Rubber soft molding (including polyurethane rubber molding) is a widely used soft molding process. Silicone rubber and polyurethane rubber have a series of excellent physical and mechanical properties, such as a wide range of hardness, excellent elasticity, and high strength, and are especially suitable for forming soft molds. Rubber with different properties can be obtained by using different material components and processing methods. Among them, the elastic modulus has an important influence on the formability of the plate and the forming quality of the parts in stamping forming. [0003] At present, rubber soft mold forming is based on the material properties and shape characteristics of the parts, using silicone rubber or polyure...

Claims

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Application Information

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IPC IPC(8): B29C51/08B29C51/34
Inventor 王忠金袁斌先王朋义罗啸
Owner HARBIN INST OF TECH
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