Cam Product TrainingCam Product Training

What is a Cam Slide Unit?What is a Cam Slide Unit?

Cam: A mechanical device that converts one linear motion to another linear direction

Cam Slide Unit: An in-die mechanical device in a metal stamping die that performs a mechanical function with attached tooling

Cam ApplicationsCam Applications

Cams are typically used in the following applications

• Piercing• Trimming• Flanging • Forming • Coining• Holding

– Cams can be uses anywhere press motion must be redirected from one direction to another.

•External / outboard Voxstyle

•Internal / inboard box style

•Mini-cam / barrel style

Types of CamsTypes of Cams

• Aerial (NAAMS Standards)

• Die mount (NAAMS Standards

• Milfab

Cam FeaturesCam Features

• Hardened surfaces

• Self-Lubricating wear surfaces

• Soft mounting face on driver

• Choice of mechanical or nitrogen springs with most models

• Component parts marked with serial number for easy re-assembly

• Positive returns on aerial and die mount models

• Wide range of cam angles up to 60 degrees on Aerial

• Product templates for easy die design on CD or Web Site

Bump CamsBump Cams

“Box” Style

• Models 2 - 5 External and 23 -25 Internal

• Box Style 11 -15 Internal

External Bump CamExternal Bump Cam

• Driver• Driver Retainer• Slide• Top Plate• End Plate• Body• Spring• Spring Guard• Stud

Internal Bump CamInternal Bump Cam

• Driver• Driver Retainer• Slide• End Plate• Body• Spring• Base Plate

MiniMini--Bump CamBump Cam

• Driver• Driver Retainer Screws• Slide• Dowel• Body• Spring• Guide Plate• Punch • Retainer

Milfab ModelsMilfab Models

• Inboard Spring

• Outboard Spring

• Gas Spring

Why Milfab?Why Milfab?

• Small economical cams provide us with excellent margins and expands the cam market

• Good name recognition

• Ongoing punch sales

• Serial Numbers and order records are maintained at Milfab for quick replacement part turnaround

• Milfab has the ability to manufacture like cams in lot sizes for customers

Inboard ModelInboard Model

• Body

• Trigger

• Pivot Pin

• Punch Plate

• Strap

• Spring Rod Spring

• Spring Cage

• Steel Washer and Urethane Stripper

• Punch

• Grease Fitting

Inboard FeaturesInboard Features

• Urethane stripper and washer standard (use on flat surfaces or where urethane can compress)

• Internal spring

• Small and compact

• Standard Trigger when used 0 to 15 degrees

• Optional offset trigger used if mounted from 15 to 60 degrees

Outboard Model Outboard Model

• Body

• Trigger

• Pivot Pin

• Punch Plate

• Strap

• Spring Rod and lock nut

• Spring

• Spring Cage

• Punch

• Body and Grease Fitting

Outboard FeaturesOutboard Features

• External Spring for stripping punch

• For use on Curved surfaces

• Part must be held for stripping in some external means

• Standard Trigger when used 0 to 15 degrees

• Special offset trigger used if mounted from 15 to 60 degrees

Gas Spring Model Gas Spring Model

• Body

• Trigger

• Gas Cylinder

• Pivot Pin

• Punch Plate

• Strap

• Spring Rod and lock nut

• Spring

• Spring Cage

• Punch

• Body and Grease Fitting

Gas Spring FeaturesGas Spring Features

• External Spring for aid in stripping and returning unit

• Gas spring for high stripping force

• For use on larger holes or any area requiring a large stripping Force

• Part must be held for stripping in some external means

• Same footprint as outboard models

• Standard Trigger when used 0 to 15 degrees

• Special offset trigger used if mounted from 15 to 60 degrees

Top(PH) Mounted UnitsTop(PH) Mounted Units

Top Mounted UnitsTop Mounted Units

• Inboard, Outboard, and Gas Spring models can all be set up for top mounting

• Oil impregnated bronze bearings added to top mounting units for punch lubrication

• Standard Trigger when used 0 to 15 degrees

• Special offset trigger used if mounted from 15 to 60 degrees..

Choosing the Right ModelChoosing the Right Model

• Material Thickness

• Type of part

• Punch stroke

• Punch force or tonnage

• Stripping Force

• Point size

• Point Shape

Other ConsiderationsOther Considerations

• Mounting angle and trigger style

• Shaped punches need key flats

• Oil impregnated available bearing on std. models

• Stripper displacement

• Special designs

DieDie--Mount / Lower Cams /Mount / Lower Cams /Downstairs Cams:Downstairs Cams:

• Cam is mounted to the die shoe or lower shoe.

• Typically work at angles of 0 -30 degrees

Die Mount CamsDie Mount Cams

• Driver• Slide• Body• Side Gib Plates• Wear Plates• Spring• Spring Retainer Assembly• Positive Return

Aerial / Upper / Upstairs / FlyingAerial / Upper / Upstairs / Flying

• Popularized in transfer presses; reduce number of dies. • Cam is mounted to upper shoe or punch shoe of the die• Typically work at an angle of 30-60 degrees.• 0-30 degrees where work and cannot clear the cam if die-mounted.

Aerial CamsAerial Cams

• Driver• UV Blocks• Slide• Body• Side Gib Plates• Wear Plate• Wearstrip• Spring• Spring Retainer

Assembly• Positive Return

Other Types of Cams Other Types of Cams -- HydraulicHydraulic

• Used for negative angle or very low shut height applications.• Non-press pierce/work unit.• Hydraulic power pack with a return spring.• Non-mechanical cam.

Other Types of Cams Other Types of Cams -- RotaryRotary

• Fill units where rotary slide moves into position to allow negative flanging

• Rotary moves out of position to accommodate removal of the part or panel

• Replaces drop slides with less space

Other Types of Cams Other Types of Cams -- GiantGiant

• Used primarily in the automotive industry

• Can handle multiple operations in one movement

• Sizes range from 400 - 1600 mm• Some manufacturers use multiple

large cams to make larger “Giant Cams”

Estimated World Cam MarketEstimated World Cam Market

Worldwide Cam Sales in Millions

$24.5

$27.5

$17.5 North AmericaEuropePacific Rim

RATIONALE FOR BUILDING YOUR OWN RATIONALE FOR BUILDING YOUR OWN CAM SLIDE UNITS INCAM SLIDE UNITS IN--HOUSEHOUSE

• Slow Economy

• Personal Satisfaction --- My Quality is Better

• Special Applications

• Perception of being cheaper

Bump Cam SlideBump Cam Slide

• Nested in a Cam Body.• Soft Mounting Face.• Angular section to accept

driver– Driver pushes slide so

it moves or “travels”• Lubrication by self-lube

wear surfaces

Bump Cam BodyBump Cam Body

• Houses the Slide ; affixed to the die ; does not move.

– Slide “travels” within the Body• Provides the Accuracy of the Cam

Work• Typical clearance between the Cam

Body and the Slide is .002 (slip fit, no slop)

Bump Cam DriverBump Cam Driver

• The driver accepts the force of the press.

• The angular section of the driver acts on the slide.

Bump Cam Spring AssemblyBump Cam Spring Assembly

• Spring rod attaches to the slide

• Spring compresses during the sliding action against endplate

• Returns the slide when the die opens

• Can aid in part stripping

Miscellaneous DetailsMiscellaneous Details

• End Plate

• Top Plate

• Driver Retainer

Glossary of TermsGlossary of Terms

Driver causes the slide to move forwardSlide contained within the body and holds the toolingBody contains and guides the moving slideSlide face location on the slide where the tooling is affixedTravel maximum movement of slide Spring the mechanism to return the slide to its home positionGuard the protection device surrounding the springRetainer prevents the driver from disengaging from the bodyPositive return ensures the slides return to the home position