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Shandong Zhengxiang Industrial and Mining Equipment Co., Ltd.

Aluminum bronze screw down the nut and screw nut

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  • Time of issue:2020-07-01
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(Summary description)Shandong Zhengxiang Industrial and Mine is a professional manufacturer of copper nuts, providing processing and casting of copper nuts of various specifications and materials. The pressing device of the rolling mill is one of the important structures of the rolling mill.

Aluminum bronze screw down the nut and screw nut

(Summary description)Shandong Zhengxiang Industrial and Mine is a professional manufacturer of copper nuts, providing processing and casting of copper nuts of various specifications and materials. The pressing device of the rolling mill is one of the important structures of the rolling mill.

  • Categories:News
  • Author:
  • Origin:
  • Time of issue:2020-07-01
  • Views:0
Information

Shandong Zhengxiang Industrial and Mine is a professional manufacturer of copper nuts, providing processing and casting of copper nuts of various specifications and materials. The pressing device of the rolling mill is one of the important structures of the rolling mill. It is used to adjust the roll gap, also called the roll gap adjustment device. The pressing device can be divided into manual pressing, electric pressing and hydraulic pressing according to the transmission mode.

It includes a press-down screw, a press-down nut, a frame and a spacer. The feature is that the press-down screw is matched with the main nut and the auxiliary nut. The main and auxiliary nuts are connected by a bolt with a compression spring. The main nut It is installed in the frame through the step surface and the end surface, the lower end of the screw is pressed down to make a spherical concave surface and the spherical pad is matched, and the thread teeth of the screw and the main and auxiliary nuts are trapezoidal teeth, and the screw and the main and auxiliary nuts are pressed down The threaded teeth are not equal in thickness.

The material of the nut for the rolling mill produced by our factory is aluminum bronze 9-4. QAl9-4 is iron-containing aluminum bronze, with high strength and anti-friction properties, good corrosion resistance, good press workability in hot state, electric welding and gas welding, but poor fiber weldability, QAl9-4 aluminum Bronze can be used as a substitute for high tin wear-resistant bronze.

The chemical composition of aluminum bronze ZCuAl9Fe4 is: aluminum Al8.0-10.0% iron Fe2.0-4.0% copper as the balance; ZCuAl9Fe4 has high strength, good corrosion resistance, high density, and stable chemical properties.

Melting process: charge copper material to melt, 1180℃, add 0.1-0.3% phosphorous copper to deoxidize, (add in two times, add 1/2 after the copper liquid is dissolved, add 1/2 before pouring) slag and add iron, wait for iron Red queen. Adding aluminum, because the process of aluminum addition is an exothermic reaction, the temperature is increased to promote the melting of the iron, and full stirring is performed. (Full stirring is important) When the temperature reaches 1150~1220℃, use 0.3~0.4% zinc chloride for refining and let it stand for 3~5 minutes. Slag removal, sampling test (gas, bending, fracture) The qualified fracture of the product is fine crystals, uniform color, light yellow color, no inclusions, unqualified coarse crystal columnar, uneven color, and inclusions.

The company has complete metal casting equipment, providing sand casting, metal casting, centrifugal casting and other casting processes. The characteristic of centrifugal casting is that the molten metal fills and solidifies under the action of centrifugal force, the metal feeding effect is good, the outer structure of the casting is dense, the non-metallic inclusions are few, and the mechanical properties are good; no modeling and core making are needed, saving related materials and equipment Invest.

The company is equipped with professional testing equipment, Tornado NCA121510 three-coordinate measuring instrument, EDX2600H spectrometer, chemical analysis equipment, metal flaw detector, hardness tester, testing machine, strong quality assurance ability, and has a comprehensive production of various high-quality national standard and non-standard products. Ability, welcome to map and process if necessary.

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