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Shandong Zhengxiang Industrial and Mining Equipment Co., Ltd.

Supply 1500 rolling mill to press down the nut and screw down the screw

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  • Time of issue:2020-07-01
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(Summary description)In the rough rolling mill reduction device of the medium and heavy plate rolling mill and the hot strip rolling line, the reduction nut and the reduction screw are very important parts. The reduction system consists of a reduction nut, a reduction screw, a spherical pad and a bearing seat of the upper support roller.

Supply 1500 rolling mill to press down the nut and screw down the screw

(Summary description)In the rough rolling mill reduction device of the medium and heavy plate rolling mill and the hot strip rolling line, the reduction nut and the reduction screw are very important parts. The reduction system consists of a reduction nut, a reduction screw, a spherical pad and a bearing seat of the upper support roller.

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

In the rough rolling mill reduction device of the medium and heavy plate rolling mill and the hot strip rolling line, the reduction nut and the reduction screw are very important parts. The reduction system consists of a reduction nut, a reduction screw, a spherical pad and a bearing seat of the upper support roller. If the spherical pad is regarded as a spherical hinge, the screw down is a rotating press rod, the nut is pressed down as a constraint, and the frame is regarded as another constraint on the bearing seat of the supporting roller. A moving pressure rod system is formed by pressing down the screw, nut and spherical pad.

Shandong Zhengxiang Industry and Mine is a professional manufacturer of screw nuts, providing processing and casting of copper nuts of various specifications and materials. In the 1500 rolling line, the nut is used centrifugal casting or metal mold casting, and no defects such as slag inclusion and cracks affecting the strength are allowed; the material is ZHAL666-3-2, the mechanical performance is ≥750N/m; the thread start point and the screw tail are sharp corners , The sharp corners of the Φ25mm oil hole and the Φ5mm oil hole connected with the screw are rounded by hand: ①Drill the 5mm hole from the inside of the screw hole to the outside; the deviation of each hole relative to the nominal position is ≤0.5mm.

HA166-6-3-2 is a wear-resistant alloy with high strength, hardness and wear resistance, and good corrosion resistance, but it has a tendency to corrode and crack and has poor plasticity.

Compared with other elements in copper, aluminum can significantly improve the strength and corrosion resistance of brass. Adding aluminum to the brass will significantly shift the a-phase region to the copper corner. When the aluminum content is high, a hard and brittle Y phase appears. When the zinc content of aluminum is high, the strengthening effect is good. In this copper, the surface ionization tendency of aluminum is greater than that of zinc, and a dense and hard aluminum oxide film is preferentially formed, which can prevent further oxidation of the alloy and improve corrosion resistance. HA166-6-3-2 is a transplanted variety of cast brass, used for nuts and large worms for heavy-duty fixing screws under heavy load; it can be used as a substitute for aluminum bronze QAl10-4-4.

The screw rod is made of 42crMo forged steel, the hardness HB after quenching and tempering heat treatment is 241-286, and the thread part is nitrided, and the surface hardness HV can reach 550-650.

The company is equipped with advanced machining equipment, including large equipment such as CA6063, CA61100, CA61125 and Ck180 CNC, 6150 CNC, 6140 CNC, 6140, 6136, 6520, gantry milling, milling machines, drilling machines, planers, presses, wire cutting machines, etc. Machining equipment provides a complete machining process for pressing down nuts.

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 comprehensive production of various high-quality national standard and non-standard products Ability, if necessary, welcome to order.

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