The tubing and casing coupling is the part where the casing and the casing are connected. It is a threaded part. Considering the safety of the oil well, perforation is not allowed in this place. Therefore, it is necessary to use an electric marking machine. The basic working principle of the electric marking machine is to import the marking content to be printed into the computer. The computer marking software converts the content into a digital control signal, which is transmitted to the controller, and the printing is controlled. Words and patterns composed of continuous dot matrix are printed on the workpiece, and the printing needle runs in a two-dimensional or three-dimensional plane or three-dimensional according to a set path. At the same time, the printing needle performs high-frequency impact operation under the effect of compressed air, and then in the sleeve The surface layer of the pipe coupling is printed with a concave mark composed of a dense dot matrix.

The scope of application is: all kinds of metals and non-metals whose hardness standards are within hrc60. Mainly used in vehicles, motorcycles, auto parts, motorcycle parts, vehicles and motorcycles, mechanical equipment products, gear shafts, mold markings, identification plate printing, mechanical equipment, plastic products, hardware tools , Stainless steel products, electronic devices, etc. The main feature is that the price is relatively moderate and easy for customers to accept. The font style is standard, the pattern is meticulous, the intensity is consistent, the depression is not worn, and the printing speed is faster.

The current technology has inherent shortcomings and shortcomings: it is inconvenient to control the production and processing direction during the automatic marking of the casing collar CNC production line. The height position of different equipment is not the same, and a process needs to be spared to control the height and direction , The tubing and casing coupling is cylindrical, so it will cause different directions during production and processing, which will lead to the problem that the production and processing are not beautiful and convenient; the tubing and casing coupling CNC production line needs to produce and process the inner diameter of the tubing and casing coupling The difference makes the equipment practical scope smaller. The transmission direction is fixed during normal production and processing, and the cylindrical tubing casing coupling with relatively large force during production and processing will slip, and the transmission cannot be changed. The direction cannot adjust the required transmission power.