A two-roller triangular rolling mill, production line and production process for making copper strips from oxygen-free copper rods

Abstract

The invention provides a two-roller triangular rolling mill manufacturing a copper belt through an oxygen-free copper rod, a production line and a production technology. According to the adopted technical scheme, the two-roller triangular rolling mill comprises an upper roller and a lower roller which are horizontally arranged, a male triangular rolling face is arranged on one of the upper rollerand the lower roller, and the other roller is provided with a female triangular rolling face matched with the male triangular rolling face. The two-roller triangular rolling mill manufacturing the copper belt through the oxygen-free copper rod, the production line and the production technology have the beneficial effects that firstly, at least one triangular rolling technology is adopted for achieving fast rolling thinning of the copper rod, and therefore it can be ensured that rolling of the copper rod can be completed before the temperature is lower than 500 DEG C; secondly, by means of thecopper belt manufactured through the oxygen-free copper rod, the surface is free of oxygen and is smooth and bright, in addition, crystallization is good, stability is good, and the copper belt is completely suitable for hardware stamp parts (such as binding posts); thirdly, the product mass density is high, and metallographic phase losses are avoided; fourthly, the cost is low (heating of each ton of natural gas costs about 100 yuan, the electric charge is about 30 yuan, the copper rod costs about 800 yuan, the other cost is about 300 yuan, and the overall cost is about 1230 yuan; and fifthly, the investment is small, labor is small, energy is saved, the yield of per shift (with 8-hour work) of one production line is about 60 tons.

Description

technical field [0001] The invention relates to a two-roller triangular rolling mill for making copper strips from oxygen-free copper rods, a production line and a production process, belonging to the field of metal processing. Background technique [0002] The more advanced method of producing copper strips is to put the copper rod into the extrusion machine (represented by the extrusion machine produced in Dalian), the extrusion wheel is driven by power, rotates according to the direction, and a copper rod blank enters the extrusion machine When the wheel is grooved, under the friction of the groove wheel, it is drawn into the extrusion cavity formed by the extrusion wheel and the die cavity. Since the stopper block prevents the copper material from continuing to advance, the high pressure and high temperature generated by the friction Extruding copper profiles under action, because different specifications of products require different specifications of molds, the product...

AI Technical Summary

Problems solved by technology

[0002] The more advanced method of producing copper strips is to put the copper rod into the extrusion machine (represented by the extrusion machine produced in Dalian), the extrusion wheel is driven by power, rotates according to the direction, and a copper rod blank enters the extrusion machine When the wheel is grooved, under the friction of the groove wheel, it is drawn into the extrusion cavity formed by the extrusion wheel and the die cavity. Since the stopper block prevents the copper material from continuing to advance, the high pressure and high temperature generated by the friction Extrude copper profiles under action, because different specifications of products require different specifications of molds, the product specifications are limited, and the consumption of molds is large, the pass rate is low, and the production cost is high

In addition, traditional extruders cannot produce copper strips with a thickness below 3.5mm. To produce copper strips with a thickness below 3.5mm, it is necessary to continue to thin the copper strips by cold rolling. After cold rolling, vacuum annealing is necessary.

Its production cost (the cost of cold extrusion is about 400 yuan, the cost of vacuum annealing is about 300 yuan, the cost of raw materials is about 800 yuan, plus other costs of about 500 yuan, the overall cost is about 2500 yuan) is very high, and the output is low (one production line per shift The output is only about 15 tons)

[0003] However, there is no production process for making copper strips from oxygen-free copper rods by hot rolling. The traditional hot rolling process is mainly used for rolling large copper ingots. Specifically, rolling back and forth is used. copper ingot thinning

However, this process is not suitable for the production of thinner copper strips. The main reason is that the rolling efficiency of the traditional two-roll flat rolling mill is low, and it takes 5-8 times to roll the copper rod to meet the required thickness. However, the temperature of small-sized copper rods drops rapidly during the rolling process. Usually, after 2 to 3 rollings, the temperature is lower than 500°C, and the rolling cannot be continued.

And even if the temperature problem can be solved, due to long-time rolling, a thicker oxide layer will be formed on the surface of the copper strip, and the copper strip produced needs to be polished, and the production cost is very high, and the polishing and polishing will cause damage to the copper strip. material loss

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