Hydroforming process of novel aluminum alloy special-shaped tube
An internal high pressure forming and forming technology, applied in the field of aluminum alloy tube forming, can solve problems such as immature process, and achieve the effect of facilitating internal high pressure forming, protecting the quality of the outer surface and eliminating residual stress
Inactive Publication Date: 2019-08-23
宁夏北鼎新材料产业技术有限公司
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Problems solved by technology
[0005] The purpose of the present invention is to solve the problems existing in the existing high-pressure forming of aluminum alloy special-shaped tubes, and to propose a new high-pressure forming process for aluminum alloy special-shaped tubes, so as to solve the problems of immature processes in existing production, reduce procedures, and save costs ,Improve efficiency
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0017] The specific embodiment of the present invention uses 5A02 aluminum alloy tube for aviation, and the specification of the tube blank is φ52×1.5mm for internal high pressure forming.
[0018] A new internal high-pressure forming process for aluminum alloy special-shaped tubes. The specific steps of the forming process are as follows;
[0019] Step 1: First, carry out mechanical analysis and chemical composition detection on the aluminum alloy special-shaped tube raw materials, and use an endoscope to check the quality of the inner and outer surface of the tube blank. There are no obvious scratches, no pits and other defects that affect the forming of the tube, and intercept according to the digital model of the special-shaped tube For the tube blank, leave a margin of 100mm at both ends of the tube blank, and then bend the two ends to deburr; put the bent tube blank into the preforming mold for preforming, and tap the part that is easy to bite with a rubber hammer to mak...
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The invention discloses a hydroforming process of a novel aluminum alloy special-shaped tube. The process comprises the following steps that 1, mechanical analysis and chemical component detection areconducted on a raw material of the special-shaped tube, then heat treatment and air cooling are conducted on a pre-formed tube blank, chamfering is conducted a tube opening, the outer wall of the tube is scoured to be smooth through a scouring pad, and a layer of thin polyethylene film is wound around the tube wall; 2, the treated tube is placed in a proper position of a cavity, a left punch anda right punch are manually fed until the punches completely enters the pipe end for being sealed, and a die is closed; 3, the manual flushing pressure is set, an emptying valve is opened to flush a pressure medium, an emptying overflow valve is closed, and a program is operated automatically according to a set pressure value and a displacement compensation value; and 4, pressure is released manually after operation of the step programs are completed, a left pressure cylinder and a right pressure cylinder return to the original positions, and whether the tube blank is completely subjected to film pasting, and dead wrinkle occurrence is observed. According to the process, a material is subjected to annealing, residual stress is eliminated, deformation and crack tendency are reduced, materialperformance is improved, and hydroforming is facilitated.
Description
technical field [0001] The invention relates to the technical field of forming aluminum alloy tubes, in particular to a new internal high-pressure forming process for aluminum alloy special-shaped tubes. Background technique [0002] Due to its high strength and light weight, the thin-walled aluminum alloy anisotropic tube has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industries. There are many processes, low strength, high quality, low production efficiency and short service life. The internal high pressure forming special-shaped pipe is integrally formed, the pipe has high strength, light weight, long service life, safer, and high precision. This technology has been successfully applied to aviation oil pipelines. At present, the basic steps of the internal high-pressure forming process of aluminum alloy special-shaped tubes are as follows: firstly, the chemical composition and mechanical properties of the raw m...
Claims
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IPC IPC(8): B21D26/033B21D26/041
CPCB21D26/033B21D26/041
Inventor 杨治国韩坤马永春蔡鑫杜世宇
Owner 宁夏北鼎新材料产业技术有限公司