Flaw-detecting, edge-milling and pre-bending unit for straight slit steel pipe

Abstract

The invention discloses a flaw-detecting, edge-milling and pre-bending unit for a straight slit steel pipe, belonging to the field of a steel pipe production device. The flaw-detecting, edge-milling and pre-bending unit comprises two driven roller ways that are arranged in parallel, a hydraulic system and an electric automatic control system, wherein a flaw-detecting device, a milling device and a pre-bending device are sequentially arranged on the two driven roller ways from a feed end to a discharge end; four groups of centering devices are sequentially arranged on a roller way of the input end of the flaw-detecting device, a roller way of the input end of the milling device and roller ways of the input end and output end of the pre-bending device; a large trolley guideway and a small trolley guideway are sequentially arranged between the two driven roller ways from the feed end to the discharge end; a large trolley device is arranged on the large trolley guideway; a small trolley device is arranged on the small trolley guideway; the large trolley device is provided with three gripping clamps; and the small trolley device is provided with a gripping clamp. In the unit, a steel plate is dragged to move along the driven roller ways by the large trolley and the small trolley, therefore, the production cost is reduced, and the energy consumption is reduced; and the flaw-detecting, edge-milling and pre-bending unit can be directly used for the flaw-detecting, milling and pre-bending process of the straight slit steel pipes.

Description

technical field [0001] The invention relates to a steel pipe production device, in particular to a flaw detection, edge milling and pre-bending unit for straight seam steel pipes. Background technique [0002] At present, with the development of science and technology, all walks of life have an increasing demand for conveying pipeline products in the machinery industry. The steel pipes in the prior art generally include: straight seam welded steel pipes, spiral seam double-sided submerged arc welded steel pipes and seamless Steel pipe, in the production technology of processing fixed rolling steel plate into straight seam steel pipe and straight seam welded steel pipe, the steel plate running on the roller table needs to perform fast movement during feeding, slow feed movement during edge milling, pre-bending Stepping motion, etc., in the straight seam steel pipe production line currently in production, the rapid motion and stepping motion are driven by the roller table, whi...

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Problems solved by technology

[0002] At present, with the development of science and technology, all walks of life have an increasing demand for conveying pipeline products in the machinery industry. The steel pipes in the prior art generally include: straight seam welded steel pipes, spiral seam double-sided submerged arc welded steel pipes and seamless steel pipes. Steel pipe, in the production technology of processing fixed rolling steel plate into straight seam steel pipe and straight seam welded steel pipe, the steel plate running on the roller table needs to perform fast movement during feeding, slow feed movement during edge milling, pre-bending Stepping motion, etc., in the straight seam steel pipe production line currently put into production, fast motion and stepping motion are driven by the roller table, which requires most of the roller tables with a length of more than 60 meters to be equipped with reducers, motors, clutches, etc. The equipment, some roller tables also need the function of frequency conversion and speed regulation. The number of motors in this equipment is large, the power consumption is large, the distance between the rollers is small, the quantity is large, the equipment investment is large, and the production cost is high.

In addition, it is difficult to accurately control the pre-bending step distance, and the flaw detection, edge milling, and pre-bending processes are actually relatively out of touch, which may easily cause steel stacking accidents, etc.

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