Everyone knows that the copper sleeve has low hardness […]
Everyone knows that the copper sleeve has low hardness and poor wear resistance, and it is not difficult to cause seizure, so it also has good casting performance and machinability. It has weak corrosion resistance. Then it is very careful in the manufacturing process of the craft, so what should we pay attention to in the manufacturing process of the craft?
The first point: When casting copper sleeves, all processes must be handled ingeniously. For example, the box requires the core to be placed upright, so that the cast product cannot be processed in accordance with the size due to this reason.
The second point: After processing, the castings should be cleaned first, then loaded on the car, first corrected, then when the semi-finished product is processed, get off the car and cool down. Because of the shrinkage of copper, it can be processed accurately when the workpiece is placed at room temperature.
The third point: After the finished product, especially the straight sleeve, it must not be placed horizontally and should be placed vertically to prevent deformation.
The fourth point: Packing must be reserved to avoid deformation caused by collision during transportation.
The copper sleeve is also called the same bearing. It is a kind of friction reduction used by sliding rotating machinery. It also needs to transmit thrust and support a specific effect. The copper sleeve needs to be lubricated with smooth bearings. The copper sleeve is also made of various copper alloys to smooth the mechanical parts. The self-smoothing copper sleeve needs to be lubricated. Graphite copper sleeve, no need to lubricate. The copper sleeve can be used on various large and heavy machinery and is a key component of the machinery.
There are several kinds of copper sleeve materials:
ZCuSn10Pb1: Corrosion resistance, especially for dilute sulfuric acid, hydrochloric acid and fatty acids. Construction data, corrosion-resistant, acid-resistant accessories and crusher bushings and bearings.
ZCuSn10Pb5: Smooth function, poor wear resistance and corrosion resistance, suitable for bimetal forging materials. Vehicles use bearings, internal combustion engine bimetallic bearings with a peak load of 100Mpa, piston pin sleeves, friction plates, etc.
ZCuPb10Sn10: Low hardness, poor wear resistance, prone to seizure, poor forging and cutting functions, and good corrosion resistance in the atmosphere and fresh water. It can be used for wear-resistant parts under high load (below 20Mpa) and low sliding speed (8m/s), such as connecting rods, bushes, bearings, gears, worm gears, etc.
ZCuPb15Sn8: In the absence of a smoothing agent and a water-based smoothing agent, the sliding properties and self-smoothing function are poor, easy to cut, less forging functions, and poor corrosion resistance to dilute sulfuric acid. Bearings with low surface pressure and side pressure can be used to make copper cold tubes for cold rolling mills, parts with impact resistance up to 50Mpa, bimetallic bearings for internal combustion engines, mainly used for piston pin sleeves with the smallest load up to 70Mpa. Acid-resistant accessories.