Manufacturing process of threaded drill rod

06-15-2022

At present, the manufacturing process of threaded drill rods at home and abroad is as follows.

1: Ordinary thread drill rod, both ends are male threads, there are two processing methods: integral processing method and friction welding processing method.

The process steps of the overall processing method are: Select the corresponding hollow drill steel material, cut the material according to the requirements of different length specifications, the drill rod adopts the corresponding heat treatment process in the pit furnace, shot blasting, straightening treatment, qualified inspection, spray painting, Packed into finished product warehouse.

The process steps of the friction welding method are to select the appropriate steel material for the hollow drill tool, first process the threaded joints of the threaded drill rod at both ends, and according to the different length specifications of the drill rod, the middle rod body material is used, and the friction welding machine is used in the middle. The threaded joints at both ends are welded to the rod body respectively, and the internal and external welding flashes are removed. The drill rod is subjected to the corresponding heat treatment process in the pit furnace, shot blasting, straightening treatment, qualified inspection, painting and packaging into the finished product warehouse.

2: extension drill rod, also known as quick change drill rod or male and female thread drill rod. There are also two processing methods, integral processing method and friction welding processing method.

The process steps of the overall processing method are: select the appropriate hollow drill tool steel material; cut the material according to different length specifications; process the threads at both ends; Pill, straightening treatment; qualified inspection, painting, packaging into the finished product warehouse.

The process steps of the friction welding method are: select the appropriate steel material for the hollow drill; first process the male threaded joint and female threaded joint at both ends; The threaded joints at both ends are welded to the intermediate rod body respectively. According to the steel material of the drill, the drill rod adopts the corresponding heat treatment process in the pit furnace; shot blasting and straightening;

The production process characteristics of these two thread drill rod processing methods are:

The material is completely machined, and the length and thread specifications can be determined; the pit furnace is heat-treated as a whole; after the furnace is released, the basic method does not require machining, but only shot blasting, straightening and anti-rust technology treatment and packaging into the finished product warehouse .

hollow drill steel


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