The existing bending equipment mainly includes manual and automatic methods. Manual bending mainly includes bed, corner die and corner motion mechanism, which is composed of fixed motion mechanism, pipe pressing mechanism and cnc pipe grooving machine structure. Using manual method, all hard steel pipes can be completed in multiple processes under artificial conditions. Its disadvantages are low processing efficiency, high labor intensity, and can not meet the needs of mass production.

Automatic cnc pipe grooving machine is mainly composed of control system, mechanical part and auxiliary part, using automatic production mode, mechanical part is mainly composed of bed, corner die, corner die, fixed length motion mechanism, fixed length motion mechanism, etc., controlled by the control system. The pressure pipe mechanism is constructed with a cnc pipe grooving machine, in which the auxiliary components are mainly displacement sensor, Angle sensor and corner sensor, and the control system is mainly composed of a controller. Text display, computer composition, the computer mainly completes the output of the bending program, the text display is mainly used to prompt the bending operation, its control mode uses the CNC machine tool controller, its high efficiency, suitable for mass production.

However, the automatic cnc pipe grooving machine needs a software programmer to program, and the whole machine bends the workpiece according to the programmed program. The disadvantages are: first, the whole machine cost is very high; The second is the need for specialized software programming, software programming time is long, high cost; Third, the flexibility is poor, and it is not suitable for on-site piping.

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