28.0 PRESSES:
• PARTSOF PRESSES
• CAPACITY OF PRESS
• The rated capacity of press is the force, which the slide will exert
near the bottom of the stroke.
• PRESS BED
• Press bed serves as table to which the bolster plate or the lower tool
assembly is mounted.
• PRESS SLIDE
• It is the reciprocating member of the press. It is guided in the press
frame. The upper tool member is called plunger slide. On a
Hydraulic press it is called as platen.
• PLUNGER SLIDE
• The inner slide of double action is called plunger slide. In a double
action press the punch is mounted on this slide.
• BLANK HOLDER SLIDE
• The outer slide of double action press is called blank holder slide.
• BOLSTER PLATE
• It is the plate secured to the press bed for locating and supporting
the tool.
• PITMAN
• Pitman is the connecting rod, which conveys power and motion for
the main shaft to the press slide.
2.
• It isthe coupling used to connect or disconnect the driving machine
member to or from driven machine member in a press it connects or
disconnects the flywheel to the main shaft.
• STROKE
• The stroke of the press is the reciprocating motion of the press slide.
It is the distance between terminal points of motion.
• SHUT HEIGHT
• It is the distance from the top of the bed to the bottom of the slide
with the stroke down and the adjustment up.
• DIE SPACE
• Die space is the area available for mounting tools in the press.
• CLASSIFICATION OF PRESSES
• Presses are classified by following characteristics.
• Source of power.
• Method of actuation of slides.
• Number of slides.
• Frame types.
• Intended use.
• SOURCES OF POWER
• The press is powered by one of the following sources
• Manual
• Mechanical
• Hydraulic
• Pneumat
