A 500mn extrusion equipment for producing large-diameter seamless steel pipes
A seamless steel pipe and extrusion equipment technology, applied in the field of extrusion equipment and seamless steel pipe production equipment, can solve the adverse effects of pipe fatigue strength and service life, improve equipment maintenance and steel pipe product production costs, and restrict the maximum working pressure and other issues, to achieve the effect of improving energy utilization, improving production efficiency and product quality, and reducing the cost of steel pipe products
Active Publication Date: 2016-06-08
HEBEI HONGRUN NUCLEAR EQUIP SCI & TECH CO LTD
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Problems solved by technology
[0003] Due to the small tonnage of the existing hot extrusion equipment, it is only suitable for the production of small and medium diameter seamless steel pipes, and the large diameter pipes above φ355mm are usually manufactured by the coil welding method. Not only the process is complicated, but the weld seam and its heat affected zone The structure and performance cannot be completely consistent with the parent body, which will have a negative impact on the fatigue resistance and service life of the pipe; in addition, most of the traditional hot extrusion equipment adopts a horizontal structure, and the strength of the frame structure restricts the increase of the maximum working pressure
In order to solve this problem, a vertical steel pipe extrusion machine with four-column frame structure came out, and its working pressure can reach 250MN, but it is still difficult to meet the requirements of outer diameter φ=406mm~1320, wall thickness δ=20~240mm, length L=4000 ~12000mm large-diameter alloy steel pipe production requirements, at the same time, due to the complex frame structure and cumbersome operation steps, the equipment maintenance and production costs of steel pipe products are increased
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[0023] see figure 1 , figure 2 , the present invention includes a base 11, a body frame, an extrusion actuator, a hydraulic power system and a PLC system, and the supporting equipment installation infrastructure includes two parts underground and above ground; the base 11 is fixed on the equipment installation infrastructure The underground part; the body frame is fixed on the base 11, which includes two groups of gantry frame plates 1 at the front and rear, wherein each group of gantry frame plates 1 is fixed together by small tie rods 9 evenly arranged up and down, and the front and rear groups of gantry frame plates 1 are fixed together. The door frame plate is fixedly assembled by two sets of upper and lower pull rods 2, the extrusion actuator is installed in the gantry cavity of the body frame, the hydraulic power system is arranged in the underground part of the equipment installation infrastructure, the hydraulic power system and the extrusion actuator All are control...
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Abstract
The invention discloses 500MN-extrusion equipment for producing large-diameter seamless steel pipes. The 500MN-extrusion equipment comprises a base, a machine body frame, an extrusion executing mechanism, a hydraulic power system and a PLC (programmable logic controller) system, wherein the base is fixed to the underground part of equipment installation infrastructure; the machine body frame is fixed to the base and comprises a front group of gantry frame plates and a rear group of gantry frame plates, wherein each group of gantry frame plates is formed by fixing small pull rods which are arranged up and down uniformly; the front group of gantry frame plates and the rear group of gantry frame plates are fixedly assembled by an upper group of large pull rods and a lower group of large pull rods; the extrusion executing mechanism is arranged in a gantry cavity of the machine body frame; the hydraulic powder system is arranged on the underground part of the equipment installation infrastructure; both the hydraulic power system and the extrusion executing mechanism are controlled by the PLC system. The 500MN-extrusion equipment has the characteristics of high work pressure, simple structure, convenience in operation, high practicability, low cost and the like; the requirement on production of the large-pipe diameter seamless steel pipes is met; the production efficiency and the production quality of the seamless steel pipes are remarkably improved.
Description
technical field [0001] The invention relates to seamless steel pipe production equipment, in particular to extrusion equipment suitable for producing large-diameter seamless steel pipes, and belongs to the technical field of metal non-cutting processing. Background technique [0002] At present, the production methods of seamless steel pipes are roughly divided into cross rolling method and extrusion method. Among them, the oblique rolling method is to first perforate the tube blank with a skew rolling roll, and then extend it with a rolling mill. This method has a fast production speed, but has high requirements on the machinability of the tube blank, and is mainly suitable for the production of carbon steel and low alloy. Steel pipe; the extrusion method is to use a piercer to perforate the tube billet or steel ingot, and then extrude it into a steel pipe by the extrusion machine. The seamless steel pipe produced by the hot extrusion process has high dimensional accuracy, ...
Claims
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IPC IPC(8): B21C23/21B21C25/02B25J9/00
Inventor刘春海刘强杨杰丁彦茹李福海李文亮袁学飞丁国强杨国立许洪忠赖文彪刘新刚马乐
OwnerHEBEI HONGRUN NUCLEAR EQUIP SCI & TECH CO LTD