Novel hot rolling and precision forging technique for waste oil pipes

Abstract

The invention provides a novel hot rolling and precision forging technique for waste oil pipes and belongs to the waste oil pipe restoration technology. The defects of other current technologies are overcome. The production technique comprises the following steps of primary selection, descaling, flaw detection, rough rolling, precision forging and sizing, straightening, penetrating, length fixing, top cropping, detection and storage, specifically, the oil pipes are put into storage after passing the detection. The novel hot rolling and precision forging technique has the significance that firstly, the production cost is low; secondly, the product models are complete; thirdly, the product quality is high; fourthly, pollution is avoided during production; and fifthly, the production efficiency is improved.

Description

[0001] Technical field: [0002] The invention relates to a technology for repairing waste and used oil pipes, in particular to a new technology for hot rolling and precision forging of waste and used oil pipes. [0003] Background technique: [0004] In recent years, with the rapid development of the economy and the continuous improvement of the level of science and technology, my country's industrial production field has more requirements for steel pipe specifications and higher precision requirements. And the process put forward higher requirements. The traditional method is to pierce the blank tube produced by a piercer, and then use a cold drawing machine and a cold rolling mill to reprocess it into finished steel tubes of different specifications. However, due to the limitation of its production process, there are inevitably many shortcomings. Cold-drawn process: Although cold-drawn steel pipe is fast, its processing accuracy is not high, and it is difficult to meet the r...

AI Technical Summary

Problems solved by technology

The traditional method is to punch the rough pipe produced by the piercing machine, and then use the cold drawing machine and cold rolling mill to process it again and process it into finished steel pipes of different specifications. However, due to the limitation of its production process, there are inevitably many shortcomings.

Cold drawing process: Although the cold drawn steel pipe is fast, the processing accuracy is not high, and it is difficult to meet the requirements for steel pipe precision in some fields

At the same time, the utilization rate of cold-drawn process steel pipe is low, resulting in a lot of waste

Cold rolling process: The cold rolling machine can ensure high processing precision of steel pipes and good internal and external surface finish, but the production speed is slow and the processing efficiency is low. The output per minute is only about 500mm, which is difficult to meet the production requirements of large-scale steel pipes

[0005] More importantly, regardless of the cold drawing process, cold rolling process, or hot rolling process, it must go through complex auxiliary treatment processes, such as pickling, phosphating, saponification, furnace annealing, etc. There are many production processes and the product cost is low. It also causes serious pollution to the environment and does not meet the policy requirements of energy conservation and emission reduction