Tubular plate-type compound perfusion forming method
A liquid-filled forming and tube-sheet technology, which is applied in the field of metal pressure processing, can solve the problems of uneven distribution of part wall thickness, excessive thinning of local wall thickness, difficulty in achieving length-to-diameter ratio, etc., to avoid excessive thinning of local wall thickness , No circumferential welds, reducing the difficulty of feeding
Active Publication Date: 2011-09-07
BEIHANG UNIV
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Problems solved by technology
In addition, as mentioned above, since the feeding of tubular liquid-filled forming is mainly realized through the axial direction, it is very easy to cause the wall thickness distribution of the formed part to be very uneven, and the local wall thickness is excessively thinned or even broken, and the aspect ratio It is also difficult to reach 5
In foreign countries, such parts are also formed by filling double-layer plates with liquid, then welding, and finally reshaping to form such parts. In China, the method of first stamping and then butt welding is generally used, but these methods have low forming accuracy and weld seams. Many, poor surface quality and other shortcomings
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[0022] The tube-sheet composite liquid-filled forming method provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0023] like Figure 1-Figure 6 As shown, the tube sheet composite liquid filling forming method provided by the present invention includes the following steps carried out in sequence:
[0024] 1) Take the plate 2 as a blank, bend the middle part of the plate 2 around the outer circumference of a steel rod 1 as a support, and overlap the two ends of the plate 2 to form a cylindrical shape with wings 3 Blank, after which the steel rod 1 is drawn out;
[0025] 2) When the part to be formed is a curved piece, use a pipe bender to bend the above-mentioned cylindrical blank with wing 3 at the corresponding position in the axial direction, and then according to the shape of the part to be formed, excess part of the cut off;
[0026] 3) Place the above-mentioned cut cylindrical blank ...
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The invention relates to a tubular plate-type compound perfusion forming method. The method comprises the following steps of: forming a barrel-shaped blank with a wing edge on a steel bar external bending plate; cutting off the excessive part on the wing edge; placing the cut barrel-shaped blank in a perfusion forming mould, and carrying out tubular perfusion forming by utilizing a high pressure forming liquid medium; welding and cutting edges to obtain a part blank; and carrying out laser side shearing, punching and welding on the part blank to obtain a part. In the tubular plate-type compound perfusion forming method provided by the invention, the advantages of tubular and plate-type perfusion forming technologies are combined together, feed supplement difficulty is reduced and feed supplement amount is increased while no welding line is reduced or increased, thus the phenomenon that local wall thickness is excessively reduced and the method has the advantages of good part integrity, uniform wall thickness, high strength and rigidity, no circumferential welding line and the like. Besides, perfusion reshaping and hydraulic expansion joint can be synchronously carried out on a perfusion forming part requiring local strengthening, thus follow-up processes such as welding, riveting and bolt fastening on the locally strengthened part can be eliminated.
Description
technical field [0001] The invention belongs to the technical field of metal pressure processing, and in particular relates to a composite liquid-filled forming method of a tube sheet. Background technique [0002] The liquid-filled forming method is a soft mold forming method that uses high-pressure forming liquid medium to make the bad parts plastically deform according to the pre-designed contour to form parts. It has the forming limit, high quality and precision, and can form parts with special materials and complex structures. Etc. According to the structure of the formed parts, the liquid-filled forming process is mainly divided into two types: plate liquid-filled forming and tube-type liquid-filled forming. Among them, plate liquid-filled forming is a method of liquid-filled forming with plate as the original blank. Since the plate blank is easy to flow and easy to replenish, and the relative deformation between the finished part and the blank is large, and the degre...
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Inventor 郎利辉程鹏志
Owner BEIHANG UNIV