Large caliber thick-walled tube turn-milling processing method
A thick-walled tube and large-diameter technology, which is used in the field of turning and milling of large-diameter thick-walled tubes
Inactive Publication Date: 2013-02-27
SHENYANG LIGONG UNIV
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Problems solved by technology
[0004] The purpose of this invention is to solve the technical problems existing in the existing large-diameter thick-walled inner hole processing, and to provide a large-diameter thick-walled pipe inner hole and outer circle lathe The milling method can solve the problems of low efficiency and high cost of processing the inner hole and outer circle of large-diameter thick-walled pipes
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[0033] 1. Clamp the workpiece on the spindle of the turning and milling machine tool through a three-jaw chuck, and rotate together with the spindle. The axial turning and milling inner hole adopts a corn milling cutter, and the orthogonal turning and milling outer circle adopts an end mill with a bottom edge . The corn milling cutter and the end milling cutter are respectively installed on the power unit. In addition to the rotation of the cutter itself, the longitudinal guide rail and the transverse guide rail driven by the screw on the turning and milling machine tool realize the axial and radial feed movement, and the workpiece rotates at a low speed to realize the circumferential feed movement. To achieve the movement, so as to realize the simultaneous processing of the inner hole and the outer surface of the workpiece.
[0034] 2. The main process of turning and milling of large-diameter thick-walled pipes:
[0035] (1), blank forging;
[0036] (2) Rough machining of t...
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A large caliber thick-walled tube turn-milling processing method includes that: a workpiece is clamped on a main shaft of a turn-milling machine by a three-jaw chuck to rotate with the main shaft, a corn milling cutter is used in the processing of an axial turn-milling inner hole, a face milling cutter with a bottom blade is used for the outer circle of an orthogonal turn-milling, and the axial and circumference feed of the milling cutter is realized by screws, longitudinal and transverse rails disposed on the turn-milling machine to achieve the processing for surfaces of the inner bore and the outer circle of the workpiece at the same time. The main processes of the large caliber thick-walled tube turn-milling processing includes: rough machining the outer circle and the inner bore, axially turn-milling the inner bore surface at one end, and orthogonally turn-milling the outer circle surface at one end; turning around, clamping the other end of the workpiece, axially turn-milling the inner bore surface at the other end, and orthogonally turn-milling the outer circle surface at the other end; finish machining the outer circle and the inner bore of the workpiece, axially turn-milling the inner bore surface at one end, and orthogonally turn-milling the outer circle surface at one end; and turning around, clamping the other end of the workpiece, axially turn-milling the inner bore surface at the other end, and orthogonally turn-milling the outer circle surface at the other end. The method can help to reduce the clamping frequency of workpieces, and improve concentricity of the inner bore and the outer circle surface.
Description
technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a turning and milling processing method for large-diameter thick-walled pipes. Background technique [0002] Large-diameter thick-walled seamless pipe (hereinafter referred to as: large-diameter pipe) refers to a large-diameter thick-walled seamless steel pipe with an outer diameter greater than 300mm and a ratio of outer diameter to wall thickness of less than 20, mainly used in supercritical and supercritical thermal power plants Manufacture of high-pressure boiler pipes for main pipes, pipe molds for producing centrifugal cast iron pipes, and large hydraulic cylinder blocks. Large-diameter pipes are mainly manufactured by hot rolling, forging or extrusion, and the finished products have a wall thickness difference of about 10%, which brings great difficulties to subsequent mechanical processing. At present, the machining of large-diameter pipes adopt...
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IPC IPC(8): B23C3/04
Inventor 石莉姜增辉刘景全
Owner SHENYANG LIGONG UNIV