For Threaded Rod, only light Arbors Rod, Drill Rod, MF Rod Requires Blacksmithing, but just upsetting both ends (Drill and drill rod end MF Rod wrought only). Forged Threaded Rod must choose a large horizontal force upsetting upsetting machine. Forging heating, preferably frequency heating. Heating temperature control is very important, many low life or the life of the big reasons for fluctuations in the threaded drill rod, to a large extent by forging. Drilling Rod forging process, the operator often consciously or unconsciously some forging heating temperature, which can increase the high-temperature plasticity forgings, forging a more full hydraulic drill rod blank material, especially in the small tonnage of forging on forging brazing machine, heating temperature higher, so in most cases in forging overheat even burnt state. Such shape forging process, although very good, but a "U-turn" phenomenon in the subsequent machining or handling. Because such tissue state after the process is difficult to eliminate, can not withstand the stress of high-frequency action fail prematurely. Threaded Rod after forging or hot forging state without hollow steel billet (ie threaded parts) to be annealed to eliminate forging heating or hot-rolled state organizations affected. Before machining, machining parts to partial softening annealing. Abroad using slit-type annealing furnace to complete, most of the domestic manufacturers to adopt a box furnace annealing or IF. But IF annealing ineffective, often heated box furnace annealing segment is too long, too long, failed to carry out the heating portion of the final heat treatment and affect the life of the drill rod, and this problem has not been caused by the manufacturer's attention. B22 rock drill and drill out the screw connection within M16 * 2 or side teeth, length of 0.4 to 2.8 m. Anchor drill pipe length of 1 m / root, the user need other specifications can be customized. Technical Specifications Model B22 B22 drill pipe thread connection specifications M14 * 2 M16 * 2 length 0.4-2.8 B22 air drill made of high quality steel hollow hexagonal hexagonal hollow, made of hollow steel 55SiMnMoV tail supporting a variety of hydraulic bolt rig, head can be connected to the inner and outer buckle various bits. Anchor bolt drill pipe connections connected sets, B22 anchor drill pipe bending and strong, durable, easy disassembly, easy to operate, can also be designed according to user requirements for processing drill anchor connected sets. Hollow drill pipe _ Shandong Peng Rui Technology Co., Ltd. (Certified) _ hollow steel drill by Shandong Peng Rui Technology Limited. Drilling Ltd. Shandong Peng Rui (www.zbpengrui.com) Shandong Zibo, metal cutting class leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Shandong Peng Rui Drilling Ltd. led the staff warmly welcome all inquiries negotiations to create Shandong Peng Rui Drilling Ltd. a better future.