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Blast forming mould and forming method thereof

A technology for forming molds and forming methods, applied in forming tools, manufacturing tools, metal processing equipment, etc., can solve the problems of poor room temperature plasticity, high toughness-brittle transition temperature, high deformation resistance, etc., so as to improve forming efficiency and reduce yield. High strength and molding effect

Inactive Publication Date: 2019-05-03
XIAMEN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Difficult-to-deform metal materials refer to high-strength aluminum, magnesium, stainless steel, tungsten, molybdenum, tantalum, niobium, titanium or their alloys. Usually, these materials have high deformation resistance and poor room temperature plasticity. Among them, tungsten and molybdenum are refractory. The toughness-brittleness transition temperature of metal is relatively high, and there are often problems such as cracks, cracks and bamboo joints when processing this kind of metal sheet with traditional deformation technology. The production and processing of this kind of material has always been a stumbling block that plagues the development of the industry.
[0003] The existing processing technology mostly adopts a relatively complex forming mold and a hydraulic press to process the metal sheet. In order to ensure a better stretching and forming effect of the metal sheet, the formed metal sheet is firstly pressed and then stamped out by the punch. The required shape, because the rigidity of the punch will cause the metal plate to be stretched and stressed unevenly, which may affect the forming effect of the metal plate
In addition, in order to improve the plasticity of the material, the metal sheet is also heated, but the structure of the blanking die under the heating environment is complicated, and its blanking effect is difficult to guarantee. Therefore, there is an urgent need for a tool that can ensure better blanking effect A processing method and a processing mold that can improve the plastic deformation ability of the metal sheet to facilitate the forming and processing of hard-to-deform materials and special-shaped workpieces

Method used

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  • Blast forming mould and forming method thereof
  • Blast forming mould and forming method thereof
  • Blast forming mould and forming method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment one, with reference to figure 1 with figure 2 , a combustion explosion forming mold, including an upper mold 1 and a lower mold 2 matched with the upper mold 1. The inside of the lower mold 2 is recessed along the direction away from the upper mold 1 to form a molding cavity 20, and the shape and size of the molding cavity 20 can be designed according to the requirements of specific molded products. The inside of the lower mold 2 is vertically provided with a plurality of exhaust holes 21 for exhausting the air in the molding cavity 20, and the diameter of the exhaust holes 21 is equal to 0.1 to 1.0 times the thickness of the metal sheet to be formed. The lower mold 2 is provided with an exhaust channel 22 connected to the outside along the lateral direction near the bottom, and a plurality of exhaust holes 21 are gathered to the exhaust channel 22 to communicate with the molding cavity 20 and the outside. The edge of the closed position of the lower mold ...

Embodiment 2

[0029] Embodiment two, refer to figure 2 with image 3 , using the above-mentioned explosive forming mold to process the metal plate to be formed, select a 304 stainless steel disc 5 with a diameter of 88 mm and a thickness of 2.0 mm as the metal plate to be formed, and polish the 304 stainless steel disc 5 before processing, so that Its surface roughness ≤ Ra1.6. Specifically, the combustion chamber 10 of the upper mold 1 has a diameter of 60mm and a length of 80mm, and the calculated volume is 226ml. The explosion mold is installed on a hydraulic press. The hydraulic press is a prior art, so it will not be described again. Adjust the assembly position of the upper mold 1 and the lower mold 2, so that there is a space for adding explosive organisms between the upper mold 1 and the lower mold 2. Gasoline is selected as the explosive organism, and 0.02g of gasoline is added into the container 3 by a manipulator. Place the 304 stainless steel disc 5 in a muffle furnace at 30...

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Abstract

The invention discloses a blast forming mould and a forming method thereof, and relates to the technical field of metal plate forming. The technical key points are that the device comprises an upper die and a lower die arranged opposite to the upper die, the device is characterized in that a forming position used for containing a metal plate to be machined is arranged between the upper die and thelower die, a combustion cavity is formed in the inner pit of the upper mold, the upper die is located in the combustion cavity and is internally provided with a containing part used for containing anexplosion-proof object, wherein a forming cavity is formed in the lower die, and a plurality of exhaust holes used for communicating the forming cavity with the external atmosphere are formed in theshell. The metal plate forming machine has the advantages of being high in metal plate forming efficiency and easy to operate, the method is suitable for high-pressure forming in the high-strain rateof the difficult-to-deform metal material.

Description

technical field [0001] The invention relates to the technical field of processing metal plates, in particular to an explosion forming mold and a forming method thereof. Background technique [0002] Difficult-to-deform metal materials refer to high-strength aluminum, magnesium, stainless steel, tungsten, molybdenum, tantalum, niobium, titanium or their alloys. Usually, these materials have high deformation resistance and poor room temperature plasticity. Among them, tungsten and molybdenum are refractory. The toughness-brittleness transition temperature of metal is relatively high, and there are often problems such as cracks, cracks and bamboo joints when processing this kind of metal sheet with traditional deformation technology. The production and processing of this kind of material has always been a stumbling block that plagues the development of the industry. [0003] The existing processing technology mostly adopts a relatively complex forming mold and a hydraulic press...

Claims

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Application Information

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IPC IPC(8): B21D26/08B21D37/10
Inventor 杨益航李季秀张凯星林强张厚安
Owner XIAMEN UNIV OF TECH