Brand of seamless steel pipe with rifling
Tianjin Steel Pipe: Tianjin Steel Pipe Group Co., Ltd. (TPCO for short), also known as "Great Seamless", located in Tianjin Binhai New Area, started construction at 1989. After more than 20 years of development, it has become a leading enterprise in the domestic seamless steel pipe industry, and its comprehensive strength ranks among the top three in the world steel pipe industry. The company is a comprehensive large-scale enterprise group integrating seamless steel pipe, welded pipe, equipment manufacturing, copper processing, stainless steel plate, color coated plate, gas cylinder and other industries. It is also the world's largest seamless steel pipe enterprise with the highest level of technology and equipment and the most varieties and specifications. The annual output of seamless steel pipe is 3.5 million tons, and the production and sales volume has remained the first in the world for six consecutive years.
Youfa Steel Pipe: Seamless Steel Pipe for Rifle. Tianjin Youfa Steel Pipe Group Co., Ltd. was formed by the reorganization of assets of nine subsidiaries of the former Tianjin Youfa Steel Pipe Group Co., Ltd., aiming at standardizing the business behavior of enterprises, promoting the main steel pipe industry to enter the capital market, and finally realizing the rapid take-off of enterprises. Youfa was established in July 2000 1, and its headquarters is located in Daqiuzhuang, Tianjin, the largest steel pipe production base in China. It is a large steel pipe manufacturing enterprise integrating the production of straight welded pipe, hot-dip galvanized steel pipe, spiral welded pipe, square pipe and steel-plastic composite pipe. At present, it has formed three production bases in Tianjin, Tangshan and Handan, with 2 subsidiaries and 7 subsidiaries, and the total number of employees exceeds 6,000. It has two brands, namely "Youfa" and "Zhengjinyuan", more than 60 straight welded pipe production lines, more than 40 hot-dip galvanized steel pipe production lines, 9 spiral welded pipe production lines, 20 steel-plastic composite pipe production lines, and national accredited laboratories 1 each. Since 20 10, the production and sales of steel pipes have increased by more than one million tons every year for four consecutive years.
Jiuli: Zhejiang Jiuli Special Materials Technology Co., Ltd. (formerly Zhejiang Jiuli Stainless Steel Pipe Co., Ltd.) was founded in 1987, located in the south bank of Taihu Lake in the center of the Yangtze River Delta-Zhenxi, Huzhou City, Zhejiang Province. The company has established world-advanced production lines for seamless stainless steel pipes, corrosion-resistant alloys and high-temperature alloys (extrusion, piercing, cold rolling and cold drawing) and large, medium and small-caliber welded pipes, and has been committed to providing safe, reliable, high-performance, corrosion-resistant, pressure-resistant and high-temperature-resistant stainless steel pipes and special material solutions for industrial pipeline systems. The company has established a perfect quality assurance system. On the basis of running ISO900 1:2000: 2000 quality assurance system, the nuclear quality assurance system of the National Nuclear Safety Administration was implemented. In 2004, the company obtained the special equipment manufacturing license issued by the General Administration of Quality Supervision, Inspection and Quarantine. Has passed ISO14001:2004+0: 2004 and OHSAS18001:1999 certification. The company has also passed the directive certification PED97/23/EC of European pressure equipment and the factory certification of China Register of Shipping, Lloyd's Register of Shipping, BV Register of Shipping, DNV Register of Shipping, ABS Register of Shipping of the United States and LR Register of Shipping of the United Kingdom.
Rifle manufacturing method
Scraper method
Use a steel bar slightly smaller than the inner diameter of the pistol, carve a groove at its specific position, and install a hard alloy steel sheet. There is one or two convex strips with a certain inclination on the steel sheet, the front end is beneficial to cutting, and the height of the convex can be adjusted. Pull a rifling position back and forth dozens of times, then cut a mother rifling, and then adjust the position to cut the next one. This method generally uses a single scraper to cut odd or even rifling, and can also use a double scraper to cut even rifling. You can also install a single scraper, a double scraper or three pairs of knives at opposite positions to cut 2 to 6 rifling lines at a time.
Hook broaching method
The hook-shaped cutter is placed on a steel pull rod slightly thinner than the diameter of the gun bore, and the height of the opening of the hook-shaped scraper can be adjusted by adjusting the screw of the pull rod layer. Every time it passes through the barrel, the pull rod moves a few microns. With the uniform rotation of the barrel, the mother rifling with a certain degree of winding is drawn. After reaching the predetermined width, the second rifling is pulled at different positions. Early rifling guns only pulled rifling about 20 times, while better guns pulled the same rifling about 100 times. The more drawing times, the thinner and more accurate the drawing groove is.
The early American colonists used hook broaching to make rifling, and the tools used were very simple hand-made wooden machinery, which the colonists could make themselves.
Broaching method of combined ring cutter
25-30 hard alloy steel rings are fixed on the pull rod, and the distance between each steel ring is equal. Each steel ring is machined with the same number of equidistant scrapers as the mother rifling, and each cutter can be connected with the cutter on the next steel ring according to its winding angle, which can be regarded as a spiral line from beginning to end. The blade extension of each ring is slightly larger than that of the previous ring, forming a series of tools with stable width, depth and interval. This combined pull ring cutter can cut all the mother rifling lines through the gun bore at one time, which shortens the working time and improves the output and quality.
These are brands of seamless steel pipes with rifling. Seamless steel pipe with rifling is a kind of steel pipe, which is widely used, such as seamless steel pipe and slotted steel pipe. Different types of steel pipes have different functions. You can choose a brand that suits your needs from seamless steel pipes with rifling. It is understandable to give priority to big brand steel pipes when purchasing seamless steel pipes with rifling, so that the quality of seamless steel pipes with rifling can be guaranteed, meet the national standards and be more assured when applied to building materials.
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