초록 ▼

This invention relates to a shaping device in a circulation system for producing a high pressure gas container by successively shaping a workpiece at a series of workstations. The device comprises a turn table, a plurality of holding frames, a series of drawing dies and an annealing means. The turn

This invention relates to a shaping device in a circulation system for producing a high pressure gas container by successively shaping a workpiece at a series of workstations. The device comprises a turn table, a plurality of holding frames, a series of drawing dies and an annealing means. The turn table is provided with a plurality of holding frames which are circumferentially arranged on said turn table at equally spaced distances and is adapted to turn in one direction and to stop alternately at each position of the holding frames. Each of the drawing dies comprises punch and a die combination whose dimensions gradually vary so that a bottomed steel cylinder can be successively drawn at each workstation and form a gas container having a narrow, thick opening. The drawing dies are installed in series right above the stop positions of the holding frames except the stop positions for mounting or charging, heating and demounting or discharging the steel cylinder. The heating means is positioned at the second stop position, after the first stop position at which mounting of the steel cylinder occurs or at any subsequent stop position where the workpiece may still be drawn. A ringed high frequency induction heater attached to the heating means is fitted right above the holding frame at the stop position for heating the workpiece. The bottomed steel cylinder material is mounted in and clamped to the holding frame and is gradually drawn into the shape of a gas container by the drawing dies in series.

대표청구항 ▼

In an apparatus for converting a hollow cylindrical blank workpiece into a seamless container having a trunk and a neck portion connected by a shoulder portion, particularly a container able to withstand high internal pressures, a combination comprising a carrier having a plurality of spaced work st

In an apparatus for converting a hollow cylindrical blank workpiece into a seamless container having a trunk and a neck portion connected by a shoulder portion, particularly a container able to withstand high internal pressures, a combination comprising a carrier having a plurality of spaced work stations; means for successively indexing said carrier to respective ones of said work stations; a plurality of workpiece-holding frames on said carrier and each having a cylindrical portion adapted to receive and firmly support the entire portion of a blank which will correspond to the trunk portion of the finished container; shaping means at some of said work stations adapted to move axially of the respective workpiece-holding frames for successively shaping an upper portion of the blank to form the shoulder and neck portions of the container; and clamping means at said working stations at which said shaping means are located for securely holding said workpieces during their shaping, including first cooperating means on said cylindrical portions and second cooperating means movable axially towards said cylindrical portions with said shaping means and into engagement with said first cooperating means so as to generate a radial clamping force on said cylindrical portions, whereby the firmly supported trunk portion of a blank is prevented from wrinkling under the effect of the axial movement of said shaping means during the conversion of the blank into a finished container.