Copper bar is a kind of high current conductive product, which is suitable for high and low voltage electric appliance, switch contact, distribution equipment, busbar slot, etc. . The electrical copper bar has the advantages of low resistivity and large bending degree.

Copper Bar, also known as copper bus bar, copper bus bar or copper bus bar, grounding copper bar, is made of copper, rectangular or chamfered (fillet) rectangular section of the long conductor, made of aluminum materials known as the aluminum bar, to Act as a current carrier in a circuit and to connect electrical equipment.

Copper bars are widely used in electrical equipment, especially in complete sets of distribution equipment, because copper bars have better electrical conductivity than aluminum bars, and they are generally used in a, B, C, n phase bus bars and PE bus bars in distribution cabinets In use, the copper bar is usually marked with the color letters or painted with the color paint, the copper bar marked with phase a is "yellow" , the copper bar marked with phase B is "green" , the copper bar marked with phase C is "red" , the copper bar marked with phase N is "light blue" , and the PE busbar marked with "yellow and green" .

Copper bar is mainly used in primary line (high current phase line, zero line, ground wire will be used copper bar) , in the cabinet on a large current of primary components are connected with copper bar, for example, a row of cabinets and cabinets are connected between the main bus bar, the main bus bar to each side of the Switch Electric Cabinet (disconnector, circuit breaker, etc.) is the branch bus bar. The copper row has the tinning also has the bare copper row, in the electric cabinet copper row connection place may do the tinning processing, the embossing processing or adds the conductive paste. Space can be heated shrink tube protection, some are used insulation paint. The main consideration with copper bar is the current carrying capacity, according to the size of the current suitable copper bar, the connection of the screw must be tight, otherwise the current will appear when the possibility of melting copper bar.

The technological process is: Ingot heating-hot rolling-(milling surface-cutting material-cold rolling-annealing) pickling-cold rolling-sawing-corner treatment-finishing straightening all sizing-packing-storage. The characteristic is that the performance index can be well controlled, but there are flash and chip pressing, non-rounded corner, non-smooth surface, wide tolerance, can not meet the requirements of high precision, high production cost.

1. The process flow of rolling-sawing is: Ingot heating-hot rolling-(milling surface-cutting material-cold rolling-annealing) pickling-cold rolling-sawing-corner treatment-finishing straightening all sizing-packing-storage. The characteristic is that the performance index can be well controlled, but there are flash and chip pressing, non-rounded corner, non-smooth surface, wide tolerance, can not meet the requirements of high precision, high production cost.

2. The process flow of rolling-drawing method is as follows: Ingot Heating-hot Rolling-milling surface-cold rolling-shearing-annealing-pickling-drawing-straightening all sizing-packing-storage. The characteristics are that the quality indexes can be well controlled and the production cost is low, but the shearing flash and tolerance are difficult to control.

3. The technological process of profile rolling is as follows: Iron Mould Red ingot-hot (warm) rolling-pickling-rough rolling-annealing-pickling-finishing rolling-straightening all sizing-packing-storage. The characteristic is that the performance index can be well controlled, the mill type roller is many, the production cost is big.

4. Extrusion-drawing process flow is: INGOT heating-extrusion-drawing-annealing-pickling-drawing-straightening all sizing-packing-storage. In this process, annealing and pickling processes are added to ensure the 180 ° bending property and to control the quality index. The working procedure is simple, the efficiency is high, the productivity is big, but the production cost is also big.

5. Up (or horizontal) continuous casting-rolling-drawing process flow: up (or horizontal) continuous casting-cold rolling-annealing-pickling-drawing-straightening all sizing-packing-storage. The utility model is characterized in that the working procedure is simple and the production cost is lowest. But the performance index is not as good as other methods, the specification is limited, the efficiency is low, the productivity is small. 

Source: Web Collation