Copper strip is a very common metal components, often seen in electrical components, lamp head, battery caps, buttons, seals, connectors, etc., the main role is to conduct electricity, heat conduction, corrosion-resistant equipment. Copper strip production has six areas, respectively, the furnace area, laboratory, cutting area, hot rolling area, washing area, rolling area. Below, I will talk to you about the copper strip production process, production methods in the cold rolling and hot rolling characteristics and some common problems of the solution, such as discoloration and shear indentation problems, we take a look at it!
The production process of copper strip:
1, the embryo: in accordance with the intended production goals, in the copper scrap material to add varying amounts of zinc to produce different specifications of copper raw materials.
2, laboratory: in order to ensure the production of both qualified and economic benefits of the finished product, the accuracy of the results of the laboratory appears to be very important. The duty of the laboratory is to tell the furnace master the test results quickly and accurately according to the copper blocks sent for inspection.
3,Cutting: The complete copper bar is towed by a sling, placed smoothly on a special cutting table, and then cut off by the cutting wheel saw, and then the uneven surface of the copper bar surface by the copper bar washing machine to polish the surface smooth, which is conducive to the later processing out of the copper strip surface flatness and smoothness.
4, hot rolling: after cutting the copper strip after 1000 ℃ high temperature heating, and then over the hot rolling, rolling into a thickness of 2.3cm or so of the copper strip.
5, washing: each copper block by the initial rolling steps down, due to the presence of surface impurities, in order to avoid affecting the quality of the finished product, it must be again after the fire sealing furnace and then through the water washing program. Water washing area in accordance with the different acidity is divided into two pools. The high concentration of 6-8 degrees, the low concentration of 3-5 degrees. One of the copper rod, copper belt surface produced in the red patches can be washed away by the washing pool of acid, and dark red patches by the water during the washing of iron fine bristles brush, after this series of treatment down the copper belt, obviously shine out of the copper's own inherent luster. If red patches and reddish patches are still present during the same rolling period, it is still necessary to repeat the washing step. During the washing period to regularly check the acidity of the pool, add acid in a timely manner to avoid the acid content is too low leading to inadequate washing.
6, rolling plate: rolling area according to the rolls distinguish between 180 of the initial rolling, 110 in the rolling. According to the various roller size will be hot rolled down by the sealing fire furnace forged copper strip through the above two steps, from rough to fine processing out.
The characteristics of copper strip production methods:
1, copper strip cold rolling
(1) plastic deformation.
(2) high pressure in the roll seam area, and the existence of pressure distribution, up to 2700MPa.
(3) the simultaneous existence of friction along the rolling direction and anti-rolling direction.
(4) The instantaneous temperature of the roll seam is high, up to 200-300℃.
(5) Rolling and sliding states coexist.
2, hot rolling of copper strip
Advantages of hot rolling of copper strip:
(1) hot rolling can significantly reduce energy consumption, reduce costs. Hot rolling when the metal plasticity is high, low deformation resistance, greatly reducing the metal deformation of hot rolling type energy consumption.
(2) hot rolling can improve the processing performance of metals and alloys, that is, the casting state of the coarse grains broken, significant crack healing, reducing or eliminating casting defects, the casting organization into a deformation of the organization, improve the processing performance of alloys.
(3) hot rolling is usually used in large ingots, large underpressure rolling, not only improve the production efficiency, but also for the improvement of rolling speed, the realization of the rolling process of continuity and automation to create the conditions.
