Galvanized steel wire rope is a lot of high-strength carbon steel wire with diameter of 0.3 ~ 3mm, which is first twisted into strands, and then several strands are twisted around the core of the rope. There are many types of wire rope, which can be divided into four types according to different twisting methods: left cotwist, right cotwist, left intertwist and right intertwist.
According to the different materials of steel wire rope, it can be divided into three kinds: hemp core, asbestos core and metal rope core.
According to different wire strands and wire Numbers, there are three types: 6 * 19, 7* 19 and 7*7. The most commonly used wire rope for lifting is 6 *7.
According to the surface treatment of steel wire can be divided into smooth surface and plating pot two, in the lifting operation commonly used smooth wire rope.
According to the structure of wire rope, it can be divided into point contact, line contact and surface contact.
The diameter of each layer of the contact wire is the same, but the pitch of each layer is different. Therefore, the wires cross each other to form point contact. In the work, the contact stress is high.
The thickness of the wire inside the wire of the line contact line is different, and the fine wire is placed in the groove of the thick wire. As the line contact wire rope contact stress is small, steel???? Longer rope life and increased flexibility. Because the wire contact wire rope is more compact, so the same diameter wire rope, line contact wire breaking tension is larger. The same - lay wire rope with the same diameter is also a line contact wire.
The inner wire of the surface contact wire has a special shape. Its advantages are smooth appearance, good corrosion resistance and abrasion resistance, can withstand larger transverse force; But the price is very expensive, so it can only be used in special occasions.