Slewing Mechanism and Spare Parts
A slewing mechanism is an essential component of a Tower Crane that allows it to rotate horizontally. It enables the crane to reach different areas of a construction site without having to move the entire structure.
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     Gold foil is a thin sheet made of gold from the gold processing excellent ductility. The ancient hand-made method that has been used has been called gold foil. The workshop of enamel gold foil is called æ¶é‡‘作. First, the gold ingots are sliced ​​and then sandwiched into layers of enamel paper. Each of the more than 2,000 sheets is wrapped in a stretch of paper. Bluestone hammering on the anvil around thirty times, gold Serve with iron hammer. To prevent sticking, the paper coated talc. The thickness of the gold foil is approximately 0.0003 mm.
     The ancient civilizations of the world have the mastery of making gold foil. Gold foil products were found in a 1500-year-old tomb in Sahara. China has a long history of producing gold foil. Nanjing, Suzhou, Shaoxing and Foshan are the traditional origins of gold foil in China. The earliest literature on gold foil processing in China is the "Tiangong Kaiwu" of Song Yingxing of the Ming Dynasty: "Where the gold foil is made into a thin sheet, it is wrapped into a black gold paper and thrown out with a hammer. Where the Wujin paper is made by Suhang, The paper is made of Donghai Giant Bamboo. It is lit with soybean oil, occluding the surrounding area, stopping the pinhole ventilation, and dyeing the smoke to make this paper."
     Gold foil is used for decoration of buildings, gold paste for Buddha statues, ink for printing, ink for printing, and medicine. The gold thread made of gold foil can be used to weave "Clouds" for clothing and arts and crafts. In the modern electronics industry, gold foil is also used for reverberators, electroscopes, and slits in magnetic heads of video recorders.
     2. Wrong gold process
     The wrong gold, also known as the gold wrong, is to forge the golden hammer into gold wire and gold piece, which is set on the surface of the metal object to form various patterns, images and texts. The gold wrong process is a traditional method of metal surface decoration in China, which rose in the Spring and Autumn Period. Shanxi Hunyuan unearthed copper damascene Hunting red beans in the Spring and Autumn periods. During the Warring States period, the level of wrong gold technology was further improved. Unearthed from the Tomb of Hancheng in Hebei Province, there are Jinboshan furnace, wrong gold book knife and wrong silver leopard. "Han·Food and Food" records: "The wrong knife is wrong with gold."
     The process of wrong gold is as follows:
     (1) Grooving: A mountain-shaped groove is cast or carved on the surface of the metal object by pattern, image, or text, and pitting is carved on the bottom surface of the groove so that the embedded metal can be firmly attached.
     (2) Inlay: Cut the gold wire and gold piece into the required size and shape, insert it into the groove, and beat it.
     (3) Grinding error: use the enamel (that is, grindstone) to flatten the embedded metal, and then repeatedly grind the water with leather and flannel, so that the surface is smooth and bright, and the pattern is clear.
     The wrong gold is mostly used for the surface decoration of bronzes and also for iron decoration.
     3. Gold plating process
     The gilt film is coated on other metals by electroplating. The thickness of the thick gold plating film is not less than 1/10000 inch, and the thickness of the gilt film of the gold plating plate is not less than 7/100 million inches, and the gold plating (also known as thin gold plating) gold The thickness of the film is less than 7/1 million inches.
     4. Gold plating process
     Gold-plated, also known as gold-plated, is a coating of not less than 10K of gold permanently coated on one or more sides of the base metal by heating and pressing, and then rolled or drawn into the specified thickness. The K gold content is not less than 1/20 of the weight of the entire metal.
     5. Gold process
     The extremely thin gold foil is varnished on the ceramic and metal objects, and fired by a fire to obtain a gold product.
     6. Sheet metal process
     The gold amalgam is uniformly applied to the surface of the copper, and after heating, the mercury is evaporated, and the gold is coated on the surface of the copper.
The slewing mechanism typically consists of the following components:
1. Slewing Ring: The slewing ring is a large circular bearing that supports the entire weight of the crane and allows it to rotate. It is usually located at the base of the crane and is designed to withstand heavy loads and provide smooth rotation.
2. Slewing Motor: The slewing motor is responsible for providing the necessary power to rotate the crane. It is connected to the slewing ring and is controlled by the crane operator.
3. Gear Mechanism: The gear mechanism consists of a set of gears that transmit the power from the slewing motor to the slewing ring. It ensures smooth and controlled rotation of the crane.
4. Brake System: The brake system is an important safety feature of the slewing mechanism. It is designed to hold the crane in place and prevent any unintended rotation when the crane is not in operation.
5. Control System: The control system allows the crane operator to control the rotation of the crane. It typically includes joysticks or buttons that enable the operator to start, stop, and control the speed and direction of rotation.
Overall, the slewing mechanism plays a crucial role in the functionality and versatility of a tower crane. It allows the crane to move horizontally, reach different areas of a construction site, and perform various lifting tasks efficiently.
1. Gold foil processing technology