China Drying Network On December 27, 2013, at the 2014 Shanxi Coke (International) Trading Center Market Summit Forum and Coke Fair held in Taiyuan, the coke price index (CSPI) for November 2013 was published at 81.20 points. This is the first release of the Coke Price Index (CSPI) in China. It is reported that since the operation of the Shanxi Coke (International) Trading Center for one year, various types of dealers have registered for registration in the market and actively participated in the coke spot transaction. Both the number of dealers and the volume of transactions have made breakthrough progress. This year, the total turnover of the annual contract of all the dealers of the Coke Trading Center was 381, with a total turnover of 49 million tons. The cumulative turnover of the monthly contract was 11,300, and the total transaction volume was 141 million tons. The Shanxi Coke (International) Trading Center was jointly initiated by the provincial coke group, together with large backbone coking enterprises inside and outside the province and a total of 33 shareholder companies representing a representative domestic steel company. As of December 23, the number of registered dealers in the Shanxi Coke Trading Center has reached 1,187, of which 923 are regular traders, including 179 manufacturing companies, 445 trading companies, and 299 end users. The coking enterprises in the province have all registered at the trading center. The domestic steel users such as Shougang, Tiangang, Hegang, Baosteel, and Shandong Steel have already entered the market for trading. In 2013, it was the first year of the official operation of the trading center. Focusing on the goal of “regulating the market and discovering prices,†the Center strives to promote the six major issues of electronic trading services, contract management and price discovery, network management and information sharing, capacity coordination and logistics services, financial services, full-service and dispute resolution. The realization of service function. Successfully launched two kinds of electronic transaction modes: "collective ordering" and "daily solicitation transaction", which enabled traders to freely choose trading modes, sign electronic contracts online at any time, and complete the convergence of electronic transactions and highway transportation management systems. The principle of metal spinning process is to cover the processed metal blank (tube blank) on the mandrel, while the blank is pressed at the end of the mandrel by the tail, and rotates with the mandrel along the spindle, and the rotary wheel moves along the mandrel. Light Duty Spinning,Light Duty Spinning Machine,Spinning Lathe,Cnc Spinning Machine Jiangsu Hoston Machine Tools Co., Ltd. , https://www.hostoncnc.com
Generally speaking, light automatic spinning machines have structural advantages similar to ordinary lathes. However, in order to meet the requirements of the above spinning process, large spinning machines usually have the following 11 core advantages.
1. The automatic spinning machine bed, main shaft, and transmission system, rotating wheel frame, tailstock and other parts should have sufficient rigidity, and also have a heavier worktable, a thicker guide rail, and a thick wall bearing support And cabinets.
2. The horizontal and longitudinal feed mechanisms of the rotary frame are mostly driven by hydraulic transmission or a combination of mechanical and hydraulic pressure to generate sufficient spinning pressure and balance step-less speed regulation to meet process requirements.
3. Ordinary automatic spinning machines usually use one rotary wheel, but there are multiple auxiliary forming wheels (flanging wheel, curling wheel, etc.). The number of rotating wheels or rotating frame of the powerful automatic spinning machine is 2 to 3 (the general type is 2, and the cylindrical part spinning machine is mostly 2 to 3), and is symmetrical to the spindle axis. Balancing the radial force during spinning, reducing the bending deflection, deflection, and vibration of the spindle and core mold provides a prerequisite for improving the accuracy of spinning parts. This correspondingly requires the rotary wheel to have a higher horizontal (such as a special spinning machine for cylindrical parts) or a longitudinal (such as a general-purpose automatic spinning machine) synchronous feed accuracy. However, a rotary wheel is used for the light and powerful automatic spinning machine.
4. The main shaft has sufficient transmission torque and power. According to the specific process requirements, it can meet the constant torque or constant power adjustment. In addition, it is best to make the spindle speed and the longitudinal feed speed of the rotary wheel steplessly adjustable. On the one hand, it can meet the arbitrary selection requirements of the spinning process; on the other hand, it can maintain the surface rotation speed of the core mold during the spinning process. Possibility of constant feed per revolution.