Pipe bending machine and combined wrinkle-proof plate thereof

The invention discloses a combined wrinkle-proof plate which comprises a wrinkle-proof plate body matched with a roller mold in size. A cavity where pipes are placed is formed in the wrinkle-proof plate body. The combined wrinkle-proof plate further comprises a wrinkle-proof plate core embedded in the cavity of the wrinkle-proof plate body and used for preventing the pipes from wrinkling. The wrinkle-proof plate core is in a long strip shape and can move in the extension direction of the pipes. The combined wrinkle-proof plate is of split type structural design, only the wrinkle-proof plate core needs to be made of materials at a high price while the wrinkle-proof plate body can be made of materials at a low price, and the machining cost of the whole wrinkle-proof plate can be effectively reduced. Besides, as the wrinkle-proof plate core of the wrinkle-proof plate can move in the extension direction of the pipes, the wrinkle-proof plate core can continue to be used by adjusting the location of the wrinkle-proof plate core after being finely abraded, only after the wrinkle-proof plate machines thousands of pipes does the wrinkle-proof plate core need to be replaced, and the service life is remarkably prolonged. The invention further discloses a pipe bending machine comprising the combined wrinkle-proof plate.