Magnetic medium-assisted pipe internal pressure forming method
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A magnetic medium and auxiliary tube technology, applied in the field of magnetic medium-assisted internal pressure forming of pipes and internal pressure forming of pipes, can solve problems such as poor force transmission effect, difference, and difficult sealing, and achieve low cost, simple method, and high resilience. Small amount of effect
Active Publication Date: 2018-12-04
HARBIN UNIV OF SCI & TECH
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[0006] The purpose of this invention is to solve the problems of sealing difficulty, need for follow-up cleaning process, and poor force transmission effect when traditional media such as hydraulic pressure, viscous medium, and solid particles are formed in the pipe, and use magnetorheological fluid as the force transmission medium for the first time Used in the field of internal pressure forming of pipes, the distribution state and rheological properties of the magnetorheological fluid will change under the action of the magnetic field, resulting in a force transmission effect different from that of traditional media, and can realize the quantification of the required deformation parts of the pipe Controlled loading
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specific Embodiment approach 1
[0026] Specific implementation mode one: combine Figure 1~2 Describe this embodiment, this embodiment includes an upper punch 1, an upper coil 2, a die 3, a tube blank 4, a magnetorheological fluid 5, a lower punch 6, a magnetic control unit 7, and a wire 7-1. Prepare the magnetorheological fluid 5 with the required components in proportion. The magnetorheological fluid is composed of base fluid, magnetizable particles, and stabilizers according to a certain volume fraction, of which the base fluid accounts for 10% to 40%, and the magnetizable particles account for 35%~85%, the stabilizer accounts for 0~10%. The upper punch 1 and the die 3 are arranged facing up and down, the die 3 and the lower punch 6 are arranged facing up and down, and the tube blank 4 is located in the cavity surrounded by the upper punch 1, the die 3 and the lower punch 6, and the cavity The magneto-rheological fluid 5 is contained inside, the upper coil 2 is placed at the end of the upper punch 1, and...
specific Embodiment approach 2
[0027] Specific implementation mode two: combination figure 1 Describe this embodiment. In this embodiment, the magnetorheological fluid in step 1 is composed of base liquid, magnetizable particles and stabilizer according to a certain volume fraction. Among them, the base liquid accounts for 40%, and the magnetized particles account for 56%, which is stable. agent accounted for 4%. Other steps are the same as in the first embodiment.
specific Embodiment approach 3
[0028] Specific implementation mode three: combination figure 1 Describe this embodiment. In this embodiment, the magnetorheological fluid in step 1 is composed of base liquid, magnetizable particles and stabilizer according to a certain volume fraction. Among them, the base liquid accounts for 30%, and the magnetized particles account for 65%, which is stable. agent accounted for 5%. Other steps are the same as in the first embodiment.
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Abstract
The invention discloses an internal-pressure forming method for a magnetic medium-assisted pipe. The internal-pressure forming method for the magnetic medium-assisted pipe is an internal-pressure forming method for a medium of a pipe, and used for solving the series problems of difficult sealing, the need of subsequent cleaning, poor force transfer effect and the like of traditional mediums during internal-pressure forming for a pipe. The stress state, the deformational behavior and the coordination sequence of each part during internal-pressure forming for a pipe are changed through adjusting the rheological property of a magnetorheological fluid under the action of a controllable magnetic field, and quantitative controllable loading based on on-demand distribution is realized. The method comprises the following steps: fully filling a pipe blank (4) with the prepared magnetorheological fluid (5); arranging the pipe blank (4) in a cavity formed by an upper punch pin (1), a concave die (3) and a lower punch pin (6); changing the rheological property of the magnetorheological fluid (5) through the action of the magnetic field to realize different force transfer effects; the upper punch pin (1) moves downwards to load and transfers an action force through the magnetorheological fluid (5), so that the needed parts of the pipe generate deformation; and the magnetic field and the upper punch pin (1) are removed after forming, and the obtained workpiece is taken out. The method disclosed by the invention is used for internal-pressure forming for a medium of a pipe.
Description
technical field [0001] The invention relates to a pipe internal pressure forming method, in particular to a magnetic medium-assisted pipe internal pressure forming method, which belongs to the technical field of pipe forming. Background technique [0002] Flexible media forming refers to the process of forming plates (pipes) using liquid water or oil, viscous media, solid particles, and elastic materials (rubber, polyurethane), etc. as force transmission media. With the rapid development of aerospace, automobile manufacturing and other fields, the requirements for light weight, high precision and low consumption of parts and components are also increasing. Flexible media forming is a kind of gradually developed in response to this demand advanced manufacturing technology. Compared with the traditional sheet metal forming process, the flexible medium forming technology has higher process flexibility, and has the advantages of ensuring quality, reducing costs and shortening t...
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