Copper tube can be divided into shaped tube and round tube according to its shape. And the shaped tube can be divided into oval tube, square tube, rectangular tube, triangular tube, hexagonal tube, drop-shaped tube, five-sided tube, outer square and inner round tube, spiral tube, inner ribbed tube, outer ribbed tube, plum blossom tube and so on. Copper tube is divided into extruded tube, drawn tube, welded tube, soft tube, semi-hard tube according to the production method and performance. Copper tubes can be classified according to alloy composition as purple copper tube, brass tube, bronze tube, white copper tube. Finally, according to the use can also be divided into condenser tube, air conditioning tube, cooling tube, waveguide, oxygen generator tube, aerospace tube, antenna tube and so on. So now let's get back to business and talk about copper pipe processing.
The technical requirements of copper tube processing are as follows:
1, the processing of the pipeline according to the design drawings, shape, size should meet the design requirements.
2, the diameter change at the break should be within 2% of the standard diameter of the copper pipe, and the break is not allowed to have flying edge, burr.
3, fittings should be degreased, decontaminated, no copper debris, internal and external surfaces are smooth, no oil, scars, oxidized skin.
4, the welding process must be filled with nitrogen protection, after welding with 2.8 ~ 3.0MPa dry compressed air blowing clean inside.
Copper tube processing methods are as follows:
1, on a variety of precision fine tube precision truncation processing.
2, on all kinds of precision small tube truncated end face grinding point processing.
3, on all kinds of precision small tube flare mouth closing processing.
4, to all kinds of precision small tube bending molding processing.
5, to all kinds of precision small tube side cut surface processing.
6, all kinds of precision small tube welding assembly polishing processing.
7, to all kinds of precision small tube graded compression expansion processing.
8, to a variety of tubular products multi-station stretch molding products.
9, to pipe fittings multi-hole bit wall surface empty products.
Copper tube processing methods are the following three:
1, copper tube extrusion process explanation: the definition of extrusion process is copper embryo tube through the copper tube extruder for its extrusion molding, so that the density of copper tube distribution is more uniform, the wall thickness at the same time is also distributed very well-proportioned, so as to achieve a stronger resistance to compression capacity performance.
2, copper continuous casting and rolling process explanation: continuous casting and rolling process is defined as continuous casting continuous rolling, so that the high temperature sintered liquid copper poured into the continuous casting machine rolled out of copper billet (known as continuous casting billet), followed by not after cooling, directly in the even heat furnace insulation for a certain period of time directly into the hot rolling unit in the rolling molding of copper rolling process. Continuous casting and rolling process it can cleverly casting and rolling two process combination of the use of up, and before the traditional first casting of copper billets after heating furnace heating and then rolling process has abbreviated process, reduce labor, increase the rate of metal harvesting, saving materials, enhance the quality of continuous casting billets, the production of energy-saving and environmentally friendly copper products, a step to achieve a direct mechanization, programming and automation of the advantages.
3, copper tube on the lead method process explanation: on the lead method of continuous casting of copper tube of the original characteristics of the "oxygen-free", that is, the oxygen content of 10 ppm or less, electrolytic copper melted at high temperatures into copper liquid conversion, hardening and molding of the entire process, the use of charcoal reduction and scaled graphite cover, oxygen isolation and other process techniques. Oxygen in the molten copper liquid is a new type of copper oxide and cuprous oxide exists, charcoal in the role of high temperature, can be deoxygenated by itself, so that its oxygen content of less than 10 ppm. in the process of the chemical reaction produced by the CO protective gas and scale graphite oxygen barrier, graphite is no longer oxidized in the process of crystallization, so as to achieve the effect of the above cited process.
