Bench pipe threading machine and threading method

A bench machine for threading a pipe, the machine comprising a spindle assembly, a die head assembly, a cutter assembly, a reamer assembly, a lifting handle assembly, and a frame assembly, wherein

• the spindle assembly, the die head assembly, the cutter assembly, the reamer assembly, and the lifting handle assembly are all mounted on the frame assembly, and the die head assembly, the cutter assembly, and the reamer assembly are configured to cooperate with the spindle assembly;
• the frame assembly comprises a frame mechanism and a carriage mechanism, wherein the carriage mechanism is mounted on the frame mechanism, a transmission mechanism is mounted in the frame mechanism and connected to the spindle assembly, the spindle assembly and the lifting handle assembly are mounted on the frame mechanism, and the die head assembly, the cutter assembly, and the reamer assembly are mounted on the carriage mechanism;
• the spindle assembly comprises a front chuck, a rear chuck, a spindle, a rotating disc, a spindle gear, and a spindle bearing, wherein the spindle gear is mounted at a first end of the spindle, wherein the front chuck is mounted on the spindle gear, the rear chuck is mounted at a second end of the spindle, the rotating disc is mounted on the front chuck, the spindle bearing is sleeved on the spindle, and the spindle is mounted on the frame assembly via the spindle bearing;
• wherein the die head assembly comprises a die disc, a die, a curve disc, a retaining ring, a trigger mechanism, a locking block mechanism, a slider mechanism, and an adjustment eccentric shaft, wherein
• the die is mounted on the die disc, the curve disc is mounted on the die disc via the retaining ring and configured to cooperate with the die, the slider mechanism is configured to cooperate with the die disc, the locking block mechanism is mounted on the slider mechanism, the adjustment eccentric shaft is mounted on the curve disc and configured to cooperate with the locking block mechanism, the trigger mechanism is mounted on the die disc and configured to cooperate with the slider mechanism, and the die disc is mounted on the frame assembly.