Direct forming technique for square pipe special for electric power plant and shaping machine group
A forming method and technology of square tube, applied in the direction of feeding device, positioning device, storage device, etc., can solve the problems of thin strip, small finished tube, welding seam that cannot be fixed on a line, etc.
Inactive Publication Date: 2009-09-30
江苏中港冶金设备科技有限公司
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Problems solved by technology
But it cannot be used for this kind of special flat tube product, and the flat tube product requires the weld point to be on the top of the flat tube
And the circle becomes flat so that the weld cannot be fixed on a line
Moreover, this kind of strip has (1) wide strip; (2) thin strip; (3) the product is not a common round shape; (4) the finished tube is flat, high and R arc is small, (220mm×20mm× 1.6mm) and other characteristics, it is very difficult to directly form a flat tube and then weld it
Method used
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Embodiment Construction
[0033] like figure 1 Shown is the process in which the strip material becomes a square tube theoretically in the present invention.
[0034] First, the side of the strip 1' is protruded downwards and deformed. The purpose of this process is to avoid the inward concave of both sides during the pressing and deformation of the strip in the middle, resulting in waste products.
[0035] After two times of pressing and forming on both sides of the strip, the chamfering of both ends is completed to form the top ends of 11' and 12'.
[0036] Then, the strip is finally deformed into a nearly square tube 19' by pressing the two sides of the deformed angle (that is, the same angle that the deformed strip is folded to the middle each time) to the middle for seven times, and the process is 13'. 14', 15', 16', 17', 18', 19'.
[0037] figure 2 For the actual deformation process, in the actual deformation, the bottom end of the square tube is constantly moving downwards with the extrusion...
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The invention provides a direct forming method and forming unit for a special square tube in a power plant. After the strip is deformed into a nearly square tube through the pressing process of nine flat rollers and nine vertical rollers, three sets of guide frames are used to ensure the accuracy of the top weld seam. Then it is calibrated by pressing six flat rollers and five vertical rollers for many times, and then straightened and formed by a straightening system with a combination of Turkish head, flat roller and vertical roller. The angles of the above flat rollers and vertical rollers can be adjusted. The invention can smoothly and stably form the strip material into a special square tube for the power plant, and can stably complete the welding and forming of the special square tube for the power plant, and the forming unit is convenient to adjust.
Description
Technical field [0001] The invention relates to a forming process of a special square tube for a power plant and an equipment unit for realizing the forming process. Background technique [0002] The special square pipe for the power plant referred to in the present invention is a special square welded steel pipe (220mm × 20mm × 1.6mm) for the manufacture of a large-scale tower condenser for the power plant, which is deformed and welded by the strip to form a square flat tube. The forming method of the square tube is produced domestically. Generally, it is first formed from strip steel → bent and deformed into a circle → welded → squared. This method is fast, convenient and simple. But it cannot be used for this kind of special flat tube product, and the flat tube product requires the welding seam to be on the top of the flat tube. The flattening of the circle prevents the weld from being fixed on a line. Moreover, this kind of strip has (1) wide strip; (2) thin strip; (3...
Claims
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IPC IPC(8): B23P23/04B21D5/10B21D43/04B21D43/00B21C23/08B21D3/02B21C37/08
Inventor 卢千祥张丽君
Owner 江苏中港冶金设备科技有限公司