Model HD FORMING & FLANGING MACHINE
Sheet metal forming and flanging machine
In Edge-Flanging and forming
Infinite Radius and Angle Control
The Erco Model HD Sheet Metal Former and Flanger has the ability to form flange or edge of certain heights and shapes on most kinds and thicknesses of sheet metals. The minimum radius of the curved edge and maximum height of the formed flange is limited only by the material thickness and flange height, as shown in the bend tables.
- Form plain, return bend, offset, flared, large radius and half-round flanges on curved and straight edges of sheet metal, etc.
- Flange external edges on circular discs and internal edges when the radius of the inside curved edge or hole is not less than 6″.
- Form external flanges on ends of cylinders and crowned sheet metal having 4” and larger radii curves, and internal flanges on 5” and larger radii.
- Perform work on soft or semi-hard steel, soft or semi-soft brass, copper, soft aluminum, heat treated aluminum alloys and monel metal where hand work is too costly and production does not justify expensive power press or die equipment.
For forming or flanging edges of sheet metal where contour is irregular, the Erco Model HD utilizes the oscillation of a short brake tool against a hold-down tool at variable strokes per minute. A hand wheel on the front of the machine controls the total angle of this motion.
The metal passes through the working head in one or more stages, depending upon the’ shape. A small part of the sheet is brought up at each upstroke of the brake head to produce smooth, well formed edges. The narrow working surface enables the forming of small radii and complicated shapes without leaving wrinkled flanges.
The rapidly oscillating brake head speeds the operation. After each up-stroke the work is quickly released for hand feeding through the machine. It is held down and released automatically.
The Erco Model HD Former and Flanger is a self-contained unit with the operating mechanism and drive motor placed below the work level. A flat table supports the sheet metal and passes it through the working head. The hold-down tool, brake plate tool and anvil are mounted on a solid frame. The hold-down tool performs three functions:
- To grip the work on the anvil during the brake head stroke.
- To serve as a form against which the flange is finished.
- To provide a guide for the edge of the sheet. A set screw in the hold-down arm secures the hold-down tool. The hold-down dog pivots in the frame to allow adjustments relative to the brake plate tool and anvil. A cam activates the hold-down dog, allowing the tool a small up and down motion, which grips and releases the work in synchronism with the brake head oscillation. The brake plate tool bends the flange up and finishes it against the hold-down tool. The brake plate tool is attached to the brake head, which oscillates in tracks in the frame up to a 95 degree angle in an axis coinciding with the inner edge of the anvil. A hand wheel in front of the machine adjusts the mechanism to the degree of angle or bend desired to conform to the face angle of the hold-down tool (see illustration). The anvil, attached to the machine frame and flush to the top surface of the table, provides support against which the hold-down tool operates. Concave, convex or special shaped anvils are used for different types of work. A quick-release hand lever allows for raising of the hold-down arm for removal of the finished work and tool Changeover.