mandrel
A technology of mandrel and steel wire rope is applied in the field of internal leveling, which can solve the problems of easy deformation of the mandrel and easy strain on the inner wall of the pipe, etc., and achieves the effect of good leveling effect and reduced deformation amplitude.
Active Publication Date: 2020-06-05
广东双兴新材料集团有限公司
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Problems solved by technology
[0003] The traditional inner bead leveling equipment has great defects, not only the mandrel is easily deformed, but also the mandrel is easy to strain the inner wall of the pipe
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[0031] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
[0032] As mentioned above, the traditional inner bead leveling equipment has great defects, and the mandrel is easy to strain the inner wall of the pipe. However, according to the novel inner mandrel of the present disclosure, it is pressed down by the power of the oil cylinder, the reducer is driven by the motor, and the reducer drives the mandrel to rotate. The rotation speed and angle can be controlled by PLC, and the steel pipe is insert...
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The invention discloses a core rod. The core rod is used for leveling inside a welding bead. The core rod is characterized by comprising an oil cylinder, a first connecting device, a reducer and a motor which are sequentially connected, and reverse tooth connecting rods, a steel wire rope and a connecting shaft core which are sequentially connected with the reducer. According to the novel core rod, the core rod is rotated through power of the oil cylinder, the rotation speed and angle can be controlled by a PLC, and a steel pipe is inserted on the core rod in an interpenetrating manner; when external pressure is applied, the core rod is in contact with and levels an internal welding bead through stress of the inner wall of the steel pipe and the core rod, and the core rod slightly deforms; when an instruction is received, the core rod is rotated, pressure is applied again, the deformation amplitude of the core rod is reduced, and the change of a contact surface is not large, so that the inner welding bead is leveled; through the control of the oil cylinder, a pressing wheel operates and the leveling operation starts when the oil cylinder does not press downwards, and a flattening device does not operate when the oil cylinder presses downwards; and during pipe discharge, the motor drives the reducer, and the reducer drives the core rod to rotate, so that the inner wall of the pipe is not liable to damage due to strain, and the leveling effect is better.
Description
technical field [0001] The invention relates to the technical field of inner leveling, in particular to a mandrel. Background technique [0002] Weld bead refers to a single-pass weld formed by each deposition during metal welding. The undercut of the selected welding current can be known through the inspection of the weld bead. During the traditional inner bead leveling, because the mandrel cannot be rotated, the mandrel is easily deformed and the inner wall of the welded pipe is easily strained during the inner bead leveling, resulting in poor leveling effect. The welding sequence of each weld pass in the metal welded joint is different, resulting in different residual stress. Different welding sequences will produce different residual stresses. [0003] The traditional inner bead leveling equipment has great defects, not only the mandrel is easily deformed, but also the mandrel is easy to strain the inner wall of the pipe. [0004] Therefore, there is an urgent need f...
Claims
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IPC IPC(8): B23P9/04
CPCB23P9/04
Inventor 李瑞堂林晓生叶修宝
Owner 广东双兴新材料集团有限公司