Processing Technical Manual
TLF row processing considerations
Luoyang Copper aluminum compound produced by a row of original process is used in the manufacture of special circumstances, compounded by two metal materials, the interface completely to achieve metallurgical bonding composite state, so the user requires no special processing equipment, according to Processing method for processing copper can. But, after all, is a row of copper and aluminum composite metal composite made of two, with one different kinds of metal, combined with high strength and then, if improper processing methods, will make it hierarchical. In order to protect the processing section does not undermine the combination of degrees, in the process, we should note the following:
1. punching and punching
In cutting, punching processing to adjust the mold with the mold space and punching. The phenomenon can not have a blunt blade will damage the equipment and processing materials.
2.1. drill bit when the attention to the advancing speed, especially near the bottom of the copper layer should be slow forward speed, to avoid the operating pressure, formed around the burr hole.
2.1.1 Copper and Aluminum compound to be ranked in the lower part of drilling pads and never allowed to float.
2.1.3 to be in the hole when the soap emulsion or
2.1.4 hand drill hole, the drill should be shown in Figure 1. And when in the forthcoming drill press down gently.
2.2. with punching punching, the punching die discharge gap must be copper and aluminum composite material for adjustment of the mold material on the mold clamping device must be off, especially in both cellular and U-shaped hole punch.
2.3. with copper multi-station punching machine, not only to adjust the die gap, but also to ensure that run-time in the closed mold punch and die concentricity.
3.1. in the use of high-speed saw, it is best to use liquid cooling blade saponification solution or emulsion, for aluminum with the more sticky, melting point and low viscosity saw prone to the phenomenon, the impact of processing quality.
3.2. of a saw cut
Equipment, hydraulic sawing machine, saw blade using a fine-tooth chip, in order to extend the use of time saw, sawing at the same time must be saponified liquid cooling solution or emulsion.
3.3. with a punch off
3.3.1. preferably sliced.
3.3.2. to be a long row of copper and aluminum composite bracket, so that the workpiece and die to keep in the same plane, is conducive to maintaining shape.
4. Bending: Our company is given a different sample size requirements of the bending diameter, the same basic standard with the copper, you can do the same construction; When you need a special angle to increase bending bending diameter should be appropriate, for heating, Should be used quickly are hot, prolonged heating temperature control below 200 ℃.
4.1. aluminum composite bending, press row table bend radius required for bending, or greater than the size of the table.
Thickness nominal size（mm）a
4.2. Bending process and other methods should be taken to reduce the lubrication of the friction surface.
4.3. R-angle bending mold thickness should be timely adjusted according to the material.
How to choose the distribution equipment in the copper and aluminum composite bus
With the rising price of copper, using copper and aluminum composite material of the bus is the most current manufacturer of electrical equipment concern, at present, the market has emerged copper tinned copper, copper and aluminum Lu Pai, copper coated aluminum row, there are the so-called copper alloy and so on. Then these composite materials can meet the bus, electrical equipment requirements for conductors, how should use copper and aluminum composite bus.
One. Electrical equipment requirements for electrical conductors
Electrical equipment on the bus, the main requirement is that it's carrying capacity and short-circuit in the event of failure, to meet the dynamic thermal stability requirements, which means it's electrical and mechanical properties. Copper and aluminum are good conductive material, but easily oxidized surface of copper and aluminum row, lap joints could easily lead to poor contact of the fault. Meanwhile, the hardness of the small, lap after fastening a long time will naturally loose, resulting in poor contact failure. Therefore, current-carrying electrical conductors present in 98% of copper are used.
TLF bus on its surface oxidation resistance and contact resistance with the same copper, copper layer thickness as long as certain requirements, the electrical conductivity and mechanical properties close to the copper, can meet the requirements of electrical equipment.
II. How to use copper and aluminum composite bus
1. Copper layer thickness
The thicker copper layer, its electrical conductivity and mechanical properties better, but the greater difficulty of processing, the higher the cost, after a large number of tests and computer finite element analysis, when the total copper cross section area of 20%, the highest price.
Copper layer is too thin, only the surface of copper solve the problem of poor antioxidant capacity, conductivity and hardness than aluminum row slightly higher, much lower than copper, does not solve the problem of low hardness and small electrical conductivity. Its electrical and mechanical properties can not replace the copper.
Thinner the layer of aluminum copper row, only a few μ, and uneven, the surface life is short, although the electrical equipment for a one-time investment is small, but life is short, but can not be used in harsh environmental conditions and important power places .
Thickness of the total cross-section of copper 20%, more than 90 conductivity, tensile strength close to the copper aluminum row alignment is much higher than the original selection of the cross-section only on the level of copper increases to the standard cross section, need not be changed The structure and electrical equipment dimensions.
2. Copper and Aluminum Composite Modes
Composite materials of copper and aluminum, copper, aluminum bonding strength between the critical time, the interface strength is not high, will appear in the processing of copper, aluminum layer. Solid bonding method is by mechanical stress and copper, aluminum, natural spread between the composite layer to form the composite approach is at a certain temperature, copper, aluminum between the fusion, the formation of a certain thickness of the composite layer, therefore, solid, liquid combination process approach than process method combining solid interface strength is higher.
When the interface strength is not high, the requirements of the processing equipment is also very harsh, not easy to normal user process.
1. The choice of cross section
1.1. In the high current (3200A or more), in the original copper cross-section multiplied by the coefficient K, K = 1.10-1.20, calculated at the nearest standard section.
1.2. Busbar and switchgear cabinet in the selection of reference "section of copper and aluminum composite row selected reference table."
1.3. The sample does not have non-standard cross-section can be manufactured in consultation with the company.
2. When ordering, specify type and quantity specifications. My company supply the length of each section 4m-6m, can also be cut to length available.
3. I drawings by user shearing, punching, bending and other services.