Abstract
Machine for forming, by means of a pressurized fluid, and for profiling, by means of profiling tools, a metal tubular product, for instance a pipe, in one and the same work cycle, in particular for forming a tubular product in two different portions thereof by using one injector only and forming the tubular product in two different non-adjacent portions by using two injectors.
Claims
1. A machine for forming and profiling a metal tubular product, for instance a pipe, by means of pressurized fluids and profiling tools comprising a fluid-dynamics control unit, a pusher configured and arranged for pushing the metal tubular product, vise, a mold configured and arranged for determining the desired profile of the metal tubular product through a forming process, at least a fist injector and a second injector provided with at least one battery of profiling tools wherein the first injector is provided with at least two radial channels and at least two retractable gaskets that are self-centering during its expansion step, the second injector in a position specular with respect to the first injector provided with one radial channel only and one gasket only, or alternatively two radial channels and two joints.
2. A machine for forming and profiling a metal tubular product, for instance a pipe, according to claim 1, wherein the fluid-dynamics control unit with means configured and arranged for feeding each injector with fluids at different pressures whenever they are both provided with two gaskets with fluids at different pressures.
3. A machine for forming and profiling a metal tubular product, for instance a pipe, according to any of the previous claims, wherein the battery of profiling tools is placed next to at least one of the injectors.
Description
DESCRIPTION OF THE FIGURES
[0012] FIG. 1 shows a schematic representation of a machine according to the present invention.
[0013] FIGS. 2 and 2b show a partial cross-sectional representation of an injector with two gaskets.
[0014] FIG. 3 shows a three-dimensional representation of a pipe formed by using an injector with two gaskets, the fluid being at one pressure level only.
[0015] FIG. 4 shows a three-dimensional representation of a pipe formed by using an injector with two gaskets and profiled in one and the same work cycle.
[0016] FIG. 5 shows a three-dimensional representation of a pipe formed in non-continuous portions thereof in one and the same work cycle by using two injectors with two gaskets, the fluid being at different pressures.
[0017] FIG. 1 shows a machine assembly (1) for forming and profiling a is metal tubular product, for instance a pipe, by means of pressurized fluids and profiling tools according to the present invention. Such FIG. 1 also shows a fluid-dynamics control unit (2) provided with means, not graphically shown, suitable for feeding a first injector (6) and a second injector (9), better illustrated below, with fluids at different pressures. A pusher (3) is also shown suitable for pushing the metal tubular product to be machined. A vise (4) is suitable for clamping the pipe and a female mold (5), not graphically shown, suitable for determining the desired form of the pipe through the forming process is present in the external portions of the pipe to be formed. FIG. 1 also shows a first injector (6) provided with two radial channels (6.sup.1 and 6.sup.2), not graphically shown. The figure also shows a second injector (9) in a position specular with respect to the first injector (6) provided with one radial channel (9.sup.1) and one gasket (8.sup.1), not graphically shown, or alternatively with two radial channels (9.sup.1 and 9.sup.2) and two gaskets (8.sup.1 and 8.sup.2), not graphically shown.
A battery (7) of profiling tools is located next to the first injector (6),
[0018] FIG. 2 shows the first injector (6) with the two radial channels (6.sup.1 and 6.sup.2) and two retractable gaskets (8.sup.1 and 8.sup.2), self-centering during the expansion step. Such gaskets are represented during the expansion step. FIG. 2b shows the second injector (9) with the two radial channels (9.sup.1 and 9.sup.2) and two retractable gaskets (8.sup.1 and 8.sup.2), self-centering during the expansion step. Such gaskets are represented during the expansion step.
[0019] FIG. 3 shows a three-dimensional representation of a pipe formed in one and the same work cycle in continuous portions thereof by means of an injector (6) provided with two radial channels (6.sup.1 and 6.sup.2) and two gaskets (8.sup.1 and 8.sup.2). Said injector (6) is fed with fluids at the same pressure level. Note that two conventional injectors should be used to get such machining if using known machines.
[0020] FIG. 4 shows a three-dimensional graphical representation of a pipe formed, by using a first injector (6) provided with two radial channels (6.sup.1 and 6.sup.2) and two gaskets (8.sup.1 and 8.sup.2), and profiled in one and the same work cycle.
[0021] FIG. 5 shows a three-dimensional representation of a pipe formed in one and the same work cycle in non-continuous portions of said pipe by using an injector (6) provided with two radial channels (6.sup.1 and 6.sup.2) and two gaskets (8.sup.1 and 8.sup.2) and a second injector (9) provided with two radial channels (9.sup.1 and 9.sup.2) and two gaskets (8.sup.1 and 8.sup.2). Such injectors are fed with fluids at different pressures.
