Dual-roller inclined rolling perforating technology for hot rolling seamless steel tube

Abstract

The invention discloses a dual-roller inclined rolling perforating technology, comprising the designing operation for roller, guide plate and top head, the characteristic point relationship of the roller, guide plate and top head is listed in the way of function and calculated initially by building the space model of the roller and guide plate to obtain the main parameter of the roller, guide plate and top head, the computer programming is used for executing complex iteration calculation to obtain the characteristic points of the roller, guide plate and top head quickly and exactly, after using the assembled mould, the service life and product quality of the mould can be greatly improved and the practicability is tested. The dual-roller inclined rolling perforating technology has the function of designing the mould, calculating the technological parameter and forecasting the size of rough tube, the technology can be directly used for designing, improving, upgrading and producing the dual-roller inclined rolling perforating machine for greatly raising the service life and product quality of the mould.

Description

technical field [0001] The invention relates to the field of hot-rolled seamless steel pipes, in particular to a two-roll cross-rolling piercing process for hot-rolled seamless steel pipes. Background technique [0002] The essence of the work of the two-roll cross-rolling piercing machine is to perforate the solid tube billet or steel ingot and roll it into a hollow capillary. The requirements for the piercing process are: firstly, the wall thickness of the pierced capillary must be uniform, and the ellipticity is small. The geometrical dimension accuracy is high; secondly, the inner and outer surfaces of the capillary should be relatively smooth, without defects such as scars, folds, and cracks; finally, there should be corresponding piercing speed and rolling cycle to adapt to the production rhythm of the entire unit, so that the capillary The final rolling temperature can meet the requirements of the pipe rolling mill. [0003] The two-roll cross-rolling piercing ma...

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Problems solved by technology

[0004] Since the rolling tube, the plug and the guide plate are three-dimensional in space, the engineering volume of the three-dimensional drawing design is too large

At present, it is generally converted to planar geometry for design in China, and the empirical method is used for design. There are two reasons for this: on the one hand, the sealing of the hole pattern cannot be guaranteed, and on the other hand, the process parameters provided are quite different from the actual ones. Correction can only be verified by experienced adjusters

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