Mechanical Archives - HyperCyl
Exit

How To: Build Intelligence into Piercing for Today’s High Force/High Speed Environments

Tag Archive: Mechanical

  1. “Punching and Shearing” Tips and Tricks

    Comments Off on “Punching and Shearing” Tips and Tricks

    Aries Engineering/HyperCyl is a diversified manufacturer of Hydra-Pneumatic Cylinders, Servo Actuators, Presses, Pierce Units and Joining Systems designed for use in a wide range of assembly
    and forming applications. HyperCyl has a place in virtually every segment of industrial production. HyperCyl has a proven track record in thousands of applications as a clean, quiet, reliable, self-contained power source utilizing only compressed air to generate ample output forces from 3kN – 1,780kN.

    The formula to calculate punching force is quite simple:

    Force = Hole Perimeter (length of cut) x Material Thickness (aluminum, steel, stainless) x Shear Strength or Tensile Strength (depends on type of punch being used). You must make sure that you keep your units consistent between Metric and Imperial.

    Metal Forming

    Forces required for metal piercing can be calculated as follows:
    L= Length
    T= Thickness of Material
    S= Shear Strength of Material

    L x T x S = Force Required

    (stripping force= 10% of Pierce Force)

    Stripping force is the force required to typically remove or retract the punch after it has pierced the material.

    Example:

    3/8 ” (.375″) hole through .032″ thick CRS (cold rolled steel)
    L= 1.178 (.375 x 3.141)
    T= .032
    S= 55,000

    1.178 x .032 x 55,000= 2090 lbs.

    Here are some helpful tips and tricks for punching and shearing applications:

    *While the ultimate Tensile strength is used for initial calculations for flat punch designs, the formula for using full tensile strength is applied at the onset to establish a WORST-CASE scenario for sizing our cylinders. Real life tensile can vary based on mold/forming time, cooling time, work hardening (if applicable) and a host of other miscellaneous factors. We don’t see as much variation with Aluminum castings as we do with steel.

    *We can provide parts-testing data and extrapolate from our testing for a 0.25”, 0.375”, and 0.500” nominal punch holes to determine the actual tensile/shear strengths and calculate real life forces, factoring in the flat punch or shear punch designs.

    *Not everyone uses Shear in the punch head, MOST use a flat punch so it can be sharpened easily and reused for many years. When using SHEAR in your punch head, the Shear Strength can be used for force calculations.

    *In all piercing applications, a “stripper” or positive force on the part DURING punching operation should be considered so the part can remain located in nesting during retraction of the punch from part. If absent from your design, the part will retract with the punch during retract.

    *There are numerous versions of shearing punch designs which directly correlate to forces required:

    -High angle, straight cut (think scissors)
    -Rooftop
    -Inverted Rooftop
    -Inverted Rooftop
    -Double Valley
    -JK Shear (flat punch, using Tensile strength, NOT shear strength)

    Find out more how HyperCyl can help meet your application needs, email sales@hypercyl.com.

  2. How To: Build Intelligence into Piercing for Today’s High Force/High Speed Environments

    Comments Off on How To: Build Intelligence into Piercing for Today’s High Force/High Speed Environments

    Flexibility, performance and cost have always been key factors in today’s expanding manufacturing marketplace.  For decades hydraulic and mechanical presses were the only options for high-speed, high-force Piercing Applications. HyperCyl Hydra-Pneumatic and HyperCyl-EMA servo based systems have emerged as viable alternatives geared towards today’s lean manufacturing processes. HyperCyl also provides a much cleaner solution without the mess, accumulators, drip pans, noise, heat, fans and overall footprint of outdated power technology.

    So, what to do when you need high-speed Piercing using a fixed system or robot-mounted pierce head? Well, that depends on your needs, annual Volume requirements and how long the project will run. Other factors include the material thickness, tensile strength and length-of-cut to determine the force necessary for any given piercing project.

    Outlined below we will discuss a Hydra-Pneumatic system using IntelliCyl along with a Servo system using HyperCyl-EMA and our HyperPierce equalizing units.

     

    HyperPierce self-equalizing unit with HyperCyl-EMA Servo Technology

    8-Ton Self-Equalizing ServoPierce unit (HyperCyl-EMA)
    Capability: Self-Equalizing units have the benefit of moving to your part. Meaning the press itself will move around your fixed part, not the other way around. HyperPierce + HyperCyl-EMA provides exceptional control over force, speed and distance characteristics for any application. It can also tell when your tool begins to dull due to subtle increases in force over a period of time. Signature analysis, data logging, part history, trending and root cause analysis options are also available for added functionality and tracking.

    Reliability/Costs: Servo technology is inherently capable and sizing them appropriately is crucial. Expected lifetime is from 3 Years to 5 Years, configured for any particular application. Long-Term Reliability coincides with maintenance schedules and upkeep of tooling. Costs can be higher than Hydraulics but the Energy efficiency achieved with low down-time, low noise pollution, ZERO environmental pollution (no oil) will ensure a quick ROI.

    Speed: Up to 16.00 in/sec with an extremely high rate of repeatability. Usually requires a deceleration setting before Contact and Home to maximize screw life. Multiple move profiles and full control over the process from start to finish.

    Forces: 1-10 Ton in Ball Screw configurations (BS1 & BS2) with a medium dynamic load rating; 1-25 Tons in the Roller Screw configuration with a high dynamic load rating.

     

    HyperPierce self-equalizing unit with Hydra-Pneumatic Technology

     8-Ton Non-Equalizing unit with HyperCyl (Hydra-Pneumatic)

    Capability: For basic “Fixed-Mount” pierce units, keeping things simple is sometimes best. Using only 2 pneumatic valves for operation the HyperCyl (hydra-pneumatic) cylinder greatly streamlines the startup process versus hydraulic or even servo-controlled systems. Cylinders are available in (6) design configurations. Cylinder can have the ability for Swivel Fittings (HPS and HZS systems only) for robot-mounting agility. When coupled with the IntelliCyl option, (load cell and LVLT) force distance monitoring is available.

    Reliability/Costs: (MTBS) Mean time between service interval of approximately 4-5 million cycles because down time is not an option. LIFETIME warranty on all HPI – HPS – HPX – HZ –  HZS – HPT cylinders, 1-Ton through 200-Ton. Typically HyperCyl is more expensive than Pneumatic cylinders but offer the same Clean, Quiet & Self-Contained operation WITH controllable force. Less expensive than hydraulic and mechanical systems for both short & long-term investments.

    Speed: Fast Approach speeds similar to that of a pneumatic cylinder (6 in/sec – 10 in/sec) and High Pressure speeds similar to that of hydraulic cylinders (1.0 in/sec – 2.0 in/sec).

    Forces: 1-200 tons of output force using 30-100 PSI shop air.

    _________________________________________________________________________________

    Additional Products

    HyperView Press – Signature Analysis

    IntelliCyl – Load Cell & Linear Transducer

    HyperPress–C Frame, H Frame, CGB Frame

    Mechanical Rod Locks – CSA compliance, CE certified, ISO certified