Abstract: An apparatus for manufacturing corrugated tubes comprises a unit with a hydraulic drive for clamping and sealing the tubular billet, and a device for axial compression of said tubular billet communicating with a compressed gas source. The apparatus also comprises tools installed symmetrically with relation to the direction of compression with a provision for reciprocating across said direction for at least partial encompassing of the tubular billet. The apparatus comprises a device with a pressure regulator for delivering pressurized liquid from a liquid source into the space of the tubular billet for forming the corrugated tube.

Abstract: An apparatus for manufacture of corrugated pipes by the plastic working method comprises a stand-mounted assembly for clamping and sealing a pipe blank, devised in the form of two clamps arranged coaxially at a certain distance from each other to insert the pipe blank, and furnished with a hydraulic drive. The apparatus also incorporates a device for axial compression, and tools disposed symmetrically in relation to the direction of compression and reciprocating laterally to said direction for embracing the pipe blank. The apparatus contains a device for feeding shaping fluid into the pipe blank. The hydraulic drive according to the present invention comprises hydraulic cylinders, each having a movable link provided with a through passage and mechanically coupled with the respective clamp.