A device and method for sheet metal soft mold thermoforming based on heterogeneous metal rubber

A metal rubber, heterogeneous technology, applied in the field of sheet metal soft mold thermoforming device, can solve the problems of complex sealing device, sensitive forming temperature, high cost, etc., achieve the goal of increasing forming limit, exerting plastic deformation ability and improving forming quality Effect

Active Publication Date: 2017-04-26
TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing sheet metal soft mold forming method, when gaseous, liquid or semi-solid materials are used as the force transmission soft mold, the loading device needs to be sealed in real time. The sealing device is complicated and expensive. Solid polymers are used as the force transmission mold. Soft molding is more sensitive to forming temperature and is not suitable for high-temperature hot forming process of sheet metal, which limits the further promotion and application of sheet metal soft molding forming process to a certain extent

Method used

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  • A device and method for sheet metal soft mold thermoforming based on heterogeneous metal rubber
  • A device and method for sheet metal soft mold thermoforming based on heterogeneous metal rubber
  • A device and method for sheet metal soft mold thermoforming based on heterogeneous metal rubber

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specific Embodiment approach 1

[0021] Specific implementation mode one: combine figure 1 Describe this embodiment, this embodiment comprises plunger 1, container frame 2, heterogeneous metal rubber, sheet material part 4 and have the die 5-2 of cooling pipeline, described die 5-2 with cooling pipeline The upper end surface of -2 is provided with a die cavity 5-1, the container frame 2 and the die 5-2 with a cooling pipeline are set up and down, the container frame 2 is set on the outside of the plunger 1, and the plunger 1 The head of the head is located in the inner cavity of the container frame 2, and the heterogeneous metal rubber is placed in the inner cavity formed by the lower surface of the plunger 1 and the inner wall of the container frame 2. The gap of the heterogeneous metal rubber used in the forming process depends on the plate The shape of the part 4 and the modulus of elasticity required for each stage of forming are determined.

specific Embodiment approach 2

[0022] Specific implementation mode two: combination Figure 1~Figure 5 Describe this implementation mode, this implementation mode is realized through the following steps:

[0023] Step 1. Determine the number of wire turns per unit volume in each part of the heterogeneous metal rubber used according to the shape of the plate part 4 to be formed and the modulus of elasticity required for each stage of forming n ,

[0024] n =4(1-Π) / ( π 2 d np 2 d cp )

[0025] In the formula, Π——the porosity of the metal rubber body, d np - wire diameter, d cp - the pitch diameter of the spiral coil;

[0026] Step 2, heating the plate part 4 to be formed to the temperature required for forming;

[0027] Step 3, placing the plate part 4 to be formed between the lower surface of the container frame 2 and the upper surface of the die 5-2 with a cooling pipeline, and clamping the plate part 4 to be formed;

[0028] Step 4, pushing the plunger 1 to drive the heterogeneous metal rub...

specific Embodiment approach 3

[0030] Specific implementation mode three: combination Figure 1~Figure 5 To describe this embodiment, in this embodiment, the variation range of the porosity of the heterogeneous metal rubber in step 1 is 0.2-0.8. Within this range, the heterogeneous metal rubber can sufficiently change the material properties including elastic modulus. Other steps are the same as in the second embodiment.

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Abstract

The invention relates to a soft board mold thermal forming device and method, in particular to a soft board mold thermal forming device and method based on heterogeneous metal rubber. The device and method aim at solving the problem that a homogeneous soft mold cannot adapt to different degrees of required force when formed into different portions and cannot adapt to a high-temperature forming environment. According to the device, a containing frame and a female mold with a cooling pipeline are vertically and oppositely arranged, the head of a plunger is located in an inner cavity of the containing frame, and the heterogeneous metal rubber is placed on the lower surface of the plunger. The method includes the steps that firstly, according to the shape of a board part to be formed and the degrees of force needed in all the forming stages, the composition of the heterogeneous metal rubber is determined; secondly, the board to be formed is heated to the temperature needed in the forming process; thirdly, the board to be formed is put in the position between the lower surface of the containing frame and the upper surface of the female mold with the cooling pipeline; fourthly, the plunger moves downwards to drive the heterogeneous metal rubber to act on the board, so that the board to be formed is formed in the required shape in the proper stress state; and fifthly, after being cooled, the formed part is taken out. The device and method are used for thermally forming a soft board mold.

Description

technical field [0001] The invention relates to a thermoforming device and method of a plate-like soft mold, in particular to a thermoforming device and method for a plate soft mold based on heterogeneous metal rubber. Background technique [0002] Sheet metal forming plays an important role in manufacturing technology, especially for the lightweight of automobile structures and the improvement of the performance of aerospace and other vehicles. Among them, sheet metal soft mold forming is one of the fastest-growing process methods in sheet metal parts manufacturing technology. one. The existing air inflation forming, hydraulic forming, semi-solid viscous medium pressure forming and solid polyurethane rubber forming each have their own advantages, and are suitable for a certain range of sheet metal forming, and have been well applied in many fields. However, in the existing sheet metal soft mold forming method, when gaseous, liquid or semi-solid materials are used as the fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D22/10
Inventor 袁斌先房娃曲周德
Owner TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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