Press Brake Safety 100

This class provides an overview of safety procedures for the press brake, including a description of how to adjust pullback cables.

Class Details

Class Name:
Press Brake Safety 100
Version:
1.0
Difficulty:
Beginner
Number of Lessons:
21
Additional Language:
Spanish

Class Outline

  • Objectives
  • The Importance of Press Brake Safety
  • Proper Press Operator Attire
  • Eye and Ear Protection
  • Press Safeguarding Devices
  • Personal Safeguarding Devices
  • Setting Up Possons Pullback Cables
  • Possons Cables: Adjusting the Multiplier
  • Possons Cables: Checking Pullback Cable Length
  • Adjusting Possons Cables: Adjusting Plate
  • Adjusting Possons Cables: Cable Adjusting Handle
  • Adjusting Safeguard Pullbacks: Cable Length
  • Adjusting Safeguard Pullbacks: Cable Travel
  • Inspecting Pullback Cables
  • Handling Tools
  • Basic Press Controls
  • Lockout/Tagout Procedures
  • Work Area Inspection
  • Press Inspection
  • Performing a Dry Run
  • Summary

Objectives

  • Describe the importance of press brake safety.
  • Describe the proper attire for press operators.
  • Describe appropriate eye and ear protection for press operators.
  • Identify common safeguarding devices used on the press brake.
  • Describe pullbacks and holdouts for the press brake.
  • Describe the procedure for setting up Possons pullback cables.
  • Describe how to adjust the multiplier with Possons cables.
  • Describe how to check the length for Possons cables.
  • Describe how to adjust Possons cables using the adjusting plate.
  • Describe how to adjust Possons cables using the cable adjusting handle.
  • Describe how to adjust cable length for safeguard pullback cables.
  • Describe how to adjust cable travel for safeguard pullback cables.
  • Describe how to inspect pullback cables before beginning a press brake operation.
  • List types of handling tools used near the press brake.
  • Describe the procedure for lockout/tagout.
  • List basic controls used on the press brake.
  • Describe the proper method for inspecting a press brake work area.
  • Describe the proper method for inspecting a press brake.
  • Describe the steps for performing a dry run on the press brake.

Job Roles

Certifications

Glossary

Vocabulary Term Definition
adjustable panel guard An adjustable barrier guard that prohibits access to the die area during a press operation.
barrier guards Safety equipment that prevents press operators from entering their hands near the point of operation.
bottom dead center The lowest position in the ram's stroke. BDC is also referred to as stroke-down position.
cable adjusting handle The mechanism found on Possons brand pullback cables used for adjusting cable length. The cable adjusting handle is turned counterclockwise to shorten the cables and clockwise to lengthen them.
cable adjusting plate An adjusting mechanism sometimes found on Possons brand pullback cables. The cable adjusting plate is raised to shorten the cables or lowered to lengthen them.
connecting pin Pin that secures the multiplier into place on Possons brand pullback cables.
connecting rod sleeve A device that is part of the Possons brand pullback cables. The connecting rod sleeve is part of the pullback connecting rod and is also connected to a gear that connects to the multiplier.
crankshaft The device in some mechanical presses that connects the ram to the flywheel.
die area The area that contains the die. Unless the machine is properly locked out, it is never safe to enter the die area for any reason.
dry run Performing a preliminary operation to ensure that the press is properly set up and creating workpieces properly. After a successful dry run, the operator can begin using the press to create workpieces.
dual palm buttons Two separate buttons that must be pressed simultaneously in order to power the stamping press. Dual palm buttons are considered safeguarding devices.
earmuffs A type of personal protective equipment that covers the entire outer ear. Earmuffs consist of two ear coverings connected by a band.
earplugs Ear wear that protects hearing. Earplugs are inserted inside the ear to muffle outside noises.
E-stop Another name for the red stop button. "E-stop" is short for "emergency stop."
fixed panel guard A barrier guard that prohibits access to the die area at all times during a press operation. Fixed panel guards cannot be adjusted.
flywheel The main device located in the crown of a mechanical press that is attached to the power source and regulates the reciprocating motion of the ram.
foot switch An operator control that requires press operators to insert their foot into a guard, and press a button with their foot in order to operate the press.
forward and reverse key selector A locked, key-operated control on the press that selects the direction in which the motor turns the crankshaft.
full-revolution clutch press A type of press in which the clutch, when it is tripped, cannot be disengaged until the crankshaft has completed a full revolution and the ram a full stroke.
hand vacuum tool A type of handling tool that uses a suction action and allows press operators to retrieve workpieces and stray objects from the die area without using their hands.
holdouts A safeguarding device that requires the press operator to wear wristbands. Holdouts do not allow the press operator to enter the point of operation at any time.
light curtains A row of either visible or invisible lights just before the point of operation. If the path of the lights is disturbed, the tool or machine stops operating immediately.
locator pins A series of non-threaded fasteners seated in the die area to keep the die securely in place.
lockout/tagout A specific work safety procedure or practice that safeguards employees from the unexpected powering or startup of machinery and equipment, or the release of hazardous energy during service or maintenance activities.
lower die shoe The lower plate of a die set that contains the cavity into which the punch shears the sheet metal.
magnetic lifter A type of handling tool that allows the press operator to retrieve workpieces without using hands. A magnetic lifter uses magnets to easily pick up scraps and workpieces.
main motor start and stop button Either one or two buttons on the press that turn the press main motor on and off.
mis-hit A hit that does not hit the blank at exactly the correct place. Mis-hits can cause the die, or even the press crankshaft to break.
multiplier A device used for all Possons brand pullback cables that must be adjusted with each new die set and operator. The multiplier transfers the movement of the connecting rod to the pullback cables.
nest The assembly of locator pins and devices in the die area that secure the workpiece in place.
Occupational Safety and Health Administration A government agency that sets the standards for working conditions in the United States and ensures that employees work in safe and healthy environments. The Occupational Safety & Health Administration is abbreviated as OSHA.
operator controls The controls on the press that, when depressed, cause the press to cycle. Operator controls often contain safety devices that prevent the press from cycling accidentally.
part-revolution clutch press A type of press in which the clutch, when it is tripped, can be disengaged at any point before the crankshaft has completed a full revolution and the ram a full stroke.
perpendicular An intersection of two lines or objects at right angles. When adjusting the multiplier on Possons brand pullback cables, the cast metal arrow in the multiplier must be perpendicular to the cable above it.
personal protective equipment Any example of various safety equipment that workers wear or use to prevent injury in the workplace. Safety glasses are common personal protective equipment (PPE).
pinch point Any place where two components meet that can cause an injury if an operator comes into contact with the area.
point of operation The area between the lower die shoe and the upper die shoe where metal forming takes place. Press operators must stay clear of the point of operation at all times.
Possons pullback cables A common brand of pullback cables. Adjusting Possons pullback cables requires adjustment of the multiplier and sometimes, a cable adjusting plate.
press brake A type of press with an open frame and wide, narrow bed. Press brakes are often used for bending operations, and they are typically manually operated.
pullback cables A safeguarding device that requires the press operator to wear wristbands. When the press cycles, pullback cables pull back to ensure that the press operator's hands do not go near the point of operation.
pullback connecting rod The device that is used to connect pullback cables onto a press.
pullback sprocket A type of pin mounted on the face of the ram through which the pullback chain is threaded.
rack and pinion gear A type of gear that converts rotational motion to linear motion. A rack and pinion gear is used on Possons brand pullback cables to transfer the motion from the multiplier.
ram The main upper portion of a stamping press that slides up and down within the press frame during operation.
red stop button A red button on the stamping press that, when pressed on part-revolution clutch presses, stops the press immediately. The red stop button is often referred to as an E-stop.
S hook A type of fastener in the shape of an "S" that secures the pullback chain into place when adjusting the length for Safeguard pullback cables.
Safeguard pullback cables A common brand of pullback cables. Safeguard pullback cables must be adjusted at both the stroke-up and stroke-down position.
safeguarding device Any implement used to protect the operator from the point of operation. The type of safeguarding device used depends on the shop and type of stamping press.
safety tongs A type of handling tool that allows press operators to retrieve workpieces without using their hands. A press operator manipulates the tongs to grab the part from the die area.
slack Excess cable that has not been tightened or secured. If slack is left on a pullback cable, the pullback cable will pull back on slack, and not the cables themselves, which can lead to serious injury.
slide The upper portion of the press that slides up and down within the press frame. The upper die shoe is attached to the slide. The slide is also referred to as the ram.
sprocket tooth space A space through which the locking pin is placed to secure Safeguard pullback cables.
stroke-down The position of the ram at the bottom of its cycle.
stroke-up The position of the ram at the top of its cycle.
tension spring The spring that maintains tension on Possons pullback cables during operation. An operator must be able to place a dime between the coils of a tension spring to ensure proper tension.
top dead center The highest position in the ram's stroke. TDC is also referred to as stroke-up position.
upper die shoe The upper plate of a die set that secures the punch holder.
workpiece The product of the die. A workpiece may be a complete product in itself, or it may be one component of a product consisting of many parts.