Abstract

A method of forming a bottle-shaped or other contoured metal container by providing a hollow metal preform having a closed end and a wall thickness that decreases progressively in a direction away from the closed end, and subjecting the preform to internal fluid pressure to cause the preform to expand against the wall of a die cavity defining the desired container shape. The method may be employed in pressure-ram-forming procedures wherein a punch is advanced by means of a backing ram into the die cavity to displace and deform the closed end of the preform.

IPC Classes  ?

• B21D 26/02 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure
• B21D 51/26 - Making hollow objects characterised by the use of the objects cans or tinsClosing cans or tins in a permanent manner

Abstract

A method of forming a bottle-shaped or other contoured metal container by providing a hollow metal preform having a closed end and a wall thickness that decreases progressively in a direction away from the closed end, and subjecting the preform to internal fluid pressure to cause the preform to expand against the wall of a die cavity defining the desired container shape. The method may be employed in pressure-ram-forming procedures wherein a punch is advanced by means of a backing ram into the die cavity to displace and deform the closed end of the preform.

IPC Classes  ?

• B21D 26/02 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure
• B21D 51/26 - Making hollow objects characterised by the use of the objects cans or tinsClosing cans or tins in a permanent manner

Abstract

A method of forming a bottle-shaped or other contoured metal container by providing a hollow metal preform having a closed end and a wall thickness that decreases progressively in a direction away from the closed end, and subjecting the preform to internal fluid pressure to cause the preform to expand against the wall of a die cavity defining the desired container shape. The method may be employed in pressure-ram-forming procedures wherein a punch is advanced by means of a backing ram into the die cavity to displace and deform the closed end of the preform.

IPC Classes  ?

• B21D 39/08 - Tube expanders
• B21D 51/12 - Making hollow objects characterised by the structure of the objects objects with corrugated walls

Abstract

In hydroforming of hollow metal articles in a die, such as pressure-ram-
forming procedures, a method of decreasing cycle time of the forming process,
while ensuring acceptable product properties and avoiding failures, by
modeling the process using finite element analysis to establish a pressure-
time history that optimizes the forming operation and applies failure limits
to selected variables such as minimum wall thickness or maximum strain rate,
and transferring this pressure-time history to a computer controlling the
forming process. Thermocouple and/or continuity sensors are incorporated into
the die wall and connected to the computer so as to provide active feedback
from the die to the control of the process.

IPC Classes  ?

• B21D 26/033 - Deforming tubular bodies
• B21D 26/041 - Means for controlling fluid parameters, e.g. pressure or temperature
• B21D 26/049 - Deforming bodies having a closed end
• B21D 51/24 - Making hollow objects characterised by the use of the objects high-pressure containers, e.g. boilers, bottles

Abstract

In hydroforming of hollow metal articles in a die, such as pressure-ram-forming procedures, a method of decreasing cycle time of the forming process, while ensuring acceptable product properties and avoiding failures, by modeling the process using finite element analysis to establish a pressure-time history that optimizes the forming operation and applies failure limits to selected variables such as minimum wall thickness or maximum strain rate, and transferring this pressure-time history to a computer controlling the forming process. Thermocouple and/or continuity sensors are incorporated into the die wall and connected to the computer so as to provide active feedback from the die to the control of the process.

IPC Classes  ?

• B21D 22/24 - Deep-drawing involving two drawing operations having effects in opposite directions with respect to the blank
• B21D 24/00 - Special deep-drawing arrangements in, or in connection with, presses
• B21D 26/02 - Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces by applying fluid pressure
• B21D 26/047 - Mould construction
• B21D 26/049 - Deforming bodies having a closed end
• B21D 37/08 - Dies with different parts for several steps in a process
• B21D 51/10 - Making hollow objects characterised by the structure of the objects conically or cylindrically shaped objects
• B21D 51/24 - Making hollow objects characterised by the use of the objects high-pressure containers, e.g. boilers, bottles
• B21D 51/38 - Making inlet or outlet arrangements of cans, tins, baths, bottles or other vesselsMaking can endsMaking closures