Abstract:
The present invention is a shrinker stretcher machine that uses four distinct and separate tool cartridges to perform both shrinking and stretching operations by simply removing, rotating each tool cartridge 180 degrees, and reattaching it in its designated position. Each tool cartridge removably carries a jaw that can be removed and securely replaced with either a shrinker or stretcher jaw to accommodate the operation being performed. Each tool cartridges and jaw is firmly held in place by magnets and interlocking keyed surfaces to properly align and hold the tool cartridges and jaws.
Abstract:
Apparatus and methods for fabricating materials by die-forming that may be implemented to form a joggle in a bendable workpiece by securing the workpiece to each of at least two respective adjacent working areas, and then by displacing at least one of the at least two working areas relative to an adjacent working area in order to induce the joggle within the workpiece.
Abstract:
A pneumatic metal-work tool includes a punch assembly mounted on the front end of a hydraulic push-rod assembly. The hydraulic push-rod assembly has a hydraulic chamber mounted with a piston rod. One end of the piston rod is mounted in a center hole of a piston. When the control valve of the metal-work tool has a high pressure air entered the casing to drive the piston to move, the pressure air will be converted into a hydraulic force via the hydraulic chamber so as to have the hydraulic push rod provide a punch force, and to have a metal sheet in the opening of the punch assembly punched with a hole.
Abstract:
A press forming process involves a stretching press to form a product with a curved portion from a workpiece by imparting a pad portion to the workpiece prior to starting the press forming process. The curved portion is prepared by spreading the pad portion mainly into the longitudinal direction of the workpiece, so that the curved portion is prepared so as to have a spring back of the product minimized.
Abstract:
One-step offset bender for speed and accuracy in offsetting pipe or other materials. The offset bender (100) includes a base (110) on which is mounted a fixed shoe support (130) and a traveling shoe support (160). The fixed shoe support fixedly holds a first shoe assembly (200), and the traveling shoe support holds a second shoe assembly (200null) that can be moved vertically and horizontally. The offset bender simultaneously produces two, aligned, equal and opposite bends in conduit by pressing down on the second shoe assembly (200null). The conduit shoe assemblies include a plurality of conduit shoes that can be selectively aligned to accommodate the desired conduit. The fixed shoe support is pivotally attached to the base, and the traveling shoe support is removable, such that the bender may be folded for easy transport. A motor (361) or other power system may be used to facilitate making the bend.
Abstract:
An apparatus and a method for accurately and repeatably positioning metallic parts comprised of variable length extrusions and shaped sheet metal in a modular die system that forms a joggle in the metallic parts. The apparatus of the present invention is comprised of a standard joggle die system that is currently in use in the art. The apparatus further includes a movable back gage assembly that works in combination with the joggle die system to allow an operator to accurately position the workpiece between the joggle dies at a preselected position. The back gage assembly is movable in both the horizontal and vertical directions. The back gage assembly moves into a stored position away from the working area of the dies to permit the joggle to be formed in the workpiece. The back gage assembly can then move back into the working area to accurately position the next workpiece without the need for further adjustments.
Abstract:
An offset conduit bender has a pair of shoes which are pivotally connected to one another so that axes of the shoes remain parallel. Each shoe has a specially shaped groove in it for receiving a tube inserted into the grooves and which support the tube as the tube is bent. The grooves also have straight sections for quickly inserting a tube into the grooves from the side of the grooves. The amount of offset is accurately adjustable by a stop which is provided beneath the movable one of the shoes and the axial position of the offset relative to one end of the tube is accurately adjusted by another tube end stop. In addition, inner and outer tube deburring tools can be provided on the bender, and the bender is preferably mounted on a portable cart.
Abstract:
A flat metal strip is placed horizontally on a base plate which is vertically movable between a ram and a bolster of a press. A bending die for bending the metal strip by applying pressure in the widthwise direction is fixed to a slide cam slidable horizontally on the base plate. The slide cam has a slide cam face abutting on a front cam face formed in a drive cam mounted on the bolster. When the ram is moved downwards, a cover plate fixed to the ram covers the metal strip, pushes the base plate and the slide cam downwards, and compels the slide cam to slide horizontally toward the metal strip with the aid of the front and slide cam faces to bend the metal strip with the bending die. On the other hand, the drive cam has a rear cam face abutting on a press cam face formed in a press cam fixed to the ram. Therefore, with the downward movement of the ram, the press cam compels the drive cam to slide horizontally toward the metal strip and push the slide cam in the same direction with the aid of the rear and press cam faces, so that the bending die is further moved forwards.
Abstract:
Two pairs of dies are arranged adjacent each other so that each pair can clamp onto a metal sheet between them. One pair is situated slightly below, or stepped down from, the other pair. One pair of dies clamps onto the sheet, and then the other pair is clamped onto it to bend the sheet so that a step is formed in the sheet between the two pairs of dies, corresponding to the step down from one pair of dies to the other.