necessary to make heavy bends at one end of
CONTINUOUS--The press will run
the machine, place a dummy load at the
continuously until the stop button is pushed.
opposite end of the machine.
INCH-- The ram may be inched by use of any
Ensure that the plate is aligned for proper
selected button or foot switch and will stop
location of bend. Place hands under the plate.
whenever the button is released, regardless of
Be sure the head and upper body are clear from
the stroke position.
the plate. Do not lean over the work while
bending the plate.
LONG--The operator holds the run button or
foot switch until the ram reaches the bottom of
Engage the ram by activating the foot switch or
the stroke. When the run button or foot switch
hand buttons.
is released, the ram automatically returns to the
top of the stroke and stops.
Hossfeld Bender
SHORT--A single momentary operation of
The Hossfeld Bender is used to bend radii and
buttons or foot switches will cause the ram to
angles on a wide variety of shapes including small
go through one complete cycle.
rods, piping, tubing, flat stock, and angle iron. The
Hossfeld Bender is available in two models. Model
The total travel of the ram is controlled by the
No. 1 is a manually operated machine. Model No. 2
setting limit switches. Limit switches are installed
is a larger hydraulically operated machine. Due to the
to provide an accurate range of travel for the ram so
numerous attachments and arrangement of these
that the same bend may be made time after time
attachments on the frame of the bender, we will only
without resetting the machine. There are several
discuss the components of the machine, die selection,
types of limit switches used depending on the type
and the capacity of the machine. To properly set up
of machine. Some machines use set screws, depth
the machine, refer to the manufacturer's technical
gauges, pressure switches, micrometer adjustments,
manual.
or a combination of several different types. The use
of a depth gauge and micrometer are the most
HOSSFELD BENDER COMPONENTS.
accurate, since you can make adjustments in
--The Hossfeld Bender consists of two frames, a stop
one-thousandths of an inch.
gauge, and a center pin. The component parts of the
Hossfeld Bender are shown in figure 13-42 and are as
PRESS BRAKE OPERATIONS.--After setting
follows:
up and making all necessary adjustments to the
machine, you are ready to make bends with the press
MAIN FRAME--Stationary frame to which
brake. The following is a list of the procedures to follow
dies are attached. Each hole in the frame is
when operating the press brake:
labeled for proper die installation.
Select and position the proper dies.
SWINGING FRAME--Movable frame to
which dies are attached. Each hole in the
Check the ram to ensure that the ram is parallel
swinginig frame is labeled for proper die
to the bed. Make adjustments, if necessary.
installation.
Some presses are capable of working with the
ram tilted so that you can bend items, like
ADJUSTABLE STOP GAUGE--Used as a
funnels, where you would want a tighter bend
guide for stopping the swinging frame when
in the throat than at the edge. For most work,
producing quantities of identical parts.
you will want the ram parallel to the bed.
CENTER PIN--Joins the main frame to the
Set the depth of the ram stroke and check the
swinging frame. Used to mount dies.
setting on a scrap piece of metal.
DIE SELECTION.--Die selection is the most
Load the plate in the machine. Work in the
important consideration when setting up the Hossfeld
center of the press, where possible. If it is
Bender for use. You must follow the manufacturer's
13-36
