Finally! An Alternative to Slewing Ring Bearings with Heavy Duty Rings and Vee Guide Wheels

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Finally! An Alternative to Slewing Ring Bearings

with Heavy Duty Rings and Vee Guide Wheels

#DWwebinar

q  This webinar will be available afterwards at www.designworldonline.com & email

q  Q&A at the end of the presentation q  Hashtag for this webinar: #DWwebinar

Before We Start

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Miles Budimir Design World

Moderator

Brian Burke Product Manager

Bishop-Wisecarver Group

Finally! An Alternative to Slewing Ring Bearings with Heavy Duty Rings and Vee Guide Wheels

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Overview Agenda Bishop-‐‑Wisecarver Group

  Introduction   Range of products

An Alternative to Slewing Ring Bearings   Key features and design concepts of vee rings   Heavy capacity vee guide wheels and rings meet design criteria for slewing bearing applications   How vee technology can meet your bearing life expectations

•  Minimize installation time & extend service maintenance intervals

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Bishop-Wisecarver Group

BWG is a woman-‐‑owned family of WBENC certified companies who works with manufacturers to engineer, manufacture, and build linear and rotary motion solutions, custom complex assemblies, and optimal embedded intelligence systems. Through the integration of mechanical, electrical, software, control and systems design engineering expertise, 60+ years of experience and 20,000+ unique clients, we continue to provide a single point of service that results in custom designs, increased efficiencies, and accelerated time to market.

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Product Lines DualVee Motion Technology®

  Guide wheels, linear track and components

LoPro® – linear actuators & sub-‐‑assemblies   Un-‐‑driven, Belt, Chain, Lead-‐‑screw, Ball-‐‑screw

UtiliTrak® – linear guides MinVee® – miniature linear guides QuickTrak® – modular t-‐‑slot based linear guides MadeWell® – low complexity linear guides

  Radial wheels & crown rollers ALR – aluminum rings

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Components to Complete Systems

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DualVee Motion Technology®

Guide wheel based linear guides for   Smooth action with very low “stiction” stick-‐‑slip   Excellent for long lengths and harsh environments   High accuracy and repeatability   Speeds to 5.5 m/s, acceleration to 5 g’s   Corrosion resistant versions available

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Markets & Applications Served Aerospace Automatic Storage and Retrieval Systems Automation Equipment Automotive Bakery Machinery Camera Scanning Conveyor Systems Manufacturing Door and Gate Systems – Heavy Duty Electronic Assembly Food Processing and Scanning Foundry and Sheet Metal Handling Mach. Glass Cucing and Handling Inspection and Test Systems Industrial Washing Systems Laser Marking and Welding Machinery

Tobacco Machinery Textile and Industrial Sewing Equipment Tire Manufacturing Equipment Woodworking X-‐‑Ray Machinery XY Gantry Systems

Material Handling, Palletizing Medical  Nuclear Equipment or Handling Paper Converting, Tissues, Films Packaging and Filling Machinery Paint Spraying Systems Paper and Wood Pharmaceutical Equipment Plaster Board Machinery Plastics Postal Automation Press Feed Equipment Production Machinery Printing and Labeling Machinery Security Cameras Semiconductor

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Slewing Bearing Applications

Heavy loads and large diameters   Earthmoving equipment

•  Excavators, etc.

  Energy & Power Generation •  Windmills, Turbines, etc.

  Medical Equipment •  Radiation Treatment Machines

  Vehicles and Automotive •  Tank & Gun Turrets •  Defense

  Industrial Equipment •  Material Handling & Positioning •  Automated Machinery

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Slewing Bearing Characteristics

Positive Characteristics   Extreme loads   Slow to medium rotational speed   Large to extremely large diameters

•  500mm to 5m

  Various construction types & features •  Ball, roller, crossed-‐‑roller, etc. •  Flanged •  Gear tooth profiles

  Internal or external

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Negative Characteristics   Long lead-‐‑times

•  4 to 6 months •  Made-‐‑to-‐‑order

  High procurement cost   Installation Time/Effort

•  Mating surface preparation •  Mounting procedure

  Maintenance •  Lubrication •  Seal replacement

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Negative Characteristics   Long lead-‐‑times

•  4 to 6 months •  Made-‐‑to-‐‑order

  High procurement cost   Installation Time/Effort

•  Mating surface preparation •  Mounting procedure

  Maintenance •  Lubrication •  Seal replacement

Vee Rings 4 to 6

WEEKS

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Vee Guide Wheel Bearings and Rings

Ideal for automation & machinery Completely different concept

  Solid steel Vee guide rings •  Internal, external, dual

  Support bearings •  Sealed ball bearings or

tapered roller bearings •  Internally lubricated for life

  Lubricator housings   Drive tooth profiles

•  Gear Tooth: Internal, External •  Belt Tooth: External

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Vee Guide Wheel Bearings

Provide load capacity & guidance

Double Row Bearings   Debris tolerant   Higher load capacity

Twin Bearings   Tolerant of slight misalignment   Lower load capacity

Both versions up to 54mm outside diameter in PRT2 product line

Dynamic Load Capacity Size 54 Radial: 13595 N (3056 lb-‐‑F) Axial: 2320 N (521 lb-‐‑F)

Dynamic Load Capacity Size 54 Radial: 21373 N (4804 lb-‐‑F) Axial: 4601 N (1034 lb-‐‑F)

Note: Dynamic Load Capacity is for comparison purposes only. Please use Working Load Capacity to calculate load/life.

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Heavy Duty Vee Guide Wheel Bearings

Larger wheel bearings are available   HDRT line has 64 mm, 95 mm and 120 mm outside diameter

•  Double row ball design •  Sealed and internally lubricated for life

  Compatible with rings of 25 mm thickness

Dynamic Load Capacity Size 120 Radial: 63,830 N (14,349 lb-‐‑F)


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Largest wheel bearing   HDRT 150 mm outside diameter

•  Double row tapered roller bearing design •  Sealed and internally lubricated for life •  Compatible with rings of 33 mm thickness

Dynamic Load Capacity Size 150 Radial: 150,018 N (33,725 lb-‐‑F)

50kN Working Load


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Hardened and precision ground running surfaces

  Smooth low friction motion

Proven Vee wiping action for harsh environments

  Ejects debris

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Guide Wheel Mounting Options

Mounting styles for wheel bearings   Blind hole fixing   Through hole fixing

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Heavy Duty Vee Guide Ring Designs

Rings made from a single piece   7 Standard ring diameters: 512, 640, 768, 896, 1280, 1456, 1656 mm   Custom diameters up to 1800 mm maximum

Multiple designs Vees on internal, external or opposing surfaces

  Gear tooth profile on internal or external surfaces   Belt tooth profile on external surface   Solid ring plate without center hole

HDRE Series: External Vee

HDR Series: Internal Vee

Ring plate is a custom

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Heavy Duty Vee Guide Ring Features

Rings made from high quality steel   Hardened and precision finished for durable and smooth running surfaces

High carbon steel or stainless steel Precision grades

  P2: Ground on vee face and internal register   P1: Ground on vee face, internal register, mounting face   SS: Ground on all surfaces

Double Vee Rings

Single Vee Rings

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Heavy Duty Vee Guide Ring Mounting

Mounting ring spacers   Standard with counterbored through holes for M10 bolts   Option for M14x2 thread tapped holes

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Heavy Duty Vee Guide Ring Mounting

Spacers provide clearance to wheel bearings   Steel or stainless steel   Matched to wheel bearing/ring combinations

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Vee Guide Ring Mounting

Mount unsupported   Precision onely needed where wheel bearings mount, and where ring acaches

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Gear Teeth and Pinions

Gear tooth profile is MOD4 with 20 pressure angle   Made to ISO 1328 grade 10   Nitride hardened

Pinions to match ring gear tooth profile   Supplied with keyless locking bushing for h8 tolerance shaft   Carbon or stainless steel versions

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Heavy Duty Vee Guide Rings

Large Diameter Rings   Made from multiple segments

•  Theoretically unlimited diameter/radius

Rings over 3m ship disassembled

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Examples

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Examples

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Load Capacity vs Slewing Bearings

Based upon size   HDRT rings have less load capacity than slewing bearings   Alternative choice for many applications

HDRT Vee rings provide   Excellent usable life   Limited maintenance and long maintenance intervals

•  Lubricate Vee surface, grease gear teeth   Simple bearing replacement procedure

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Load Capacity

Dependent upon the wheel bearings   Number of wheels   Capacity of each wheel

Maximum number of wheels   Not recommended to exceed 8

•  Difficult to ensure they all share the load   Can add wheels where loads are higher

Typical designs

  Guide wheels evenly spaced   3 each or 4 each

Maximum number of wheels

System Loading: Radial, Axial, Moment

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Load Capacity

Typical 3 and 4 wheel capacities   Note: Stainless steel systems are 25% lower capacity

*Øc is the ring contact diameter in meters.

Rotary turn-‐‑table on linear stage

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Sizing Method for Vee Systems

Step 1: Determine the resultant Axial Load (LA) and Radial Load (LR). Step 2: Calculate the Load Factor (LF) using the equation below

  Note: LA(Max) is from the provided chart

Step 3: Calculate the system life in distance   Note: Basic Life (BL) is from the provided chart

Step 4 (Optional): Calculate system life in time   Use cycle time and cycle distance

=

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Sample Life Calculations

Application: Automation Turn-‐‑Table   Direct axial load of 500kg (1102lb)   4 bearings, equally spaced   External vee ring design

•  HDRE 1280 with 1280mm OD.

Rotary turn-‐‑table design concept

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Sample Life Calculations - Distance

HDRE1280 with 4x THJR120 bearings ($$$$)   63,540 km or 15,961,876 rev.

HDRE1280 with 6x THJR95 bearings ($$$)

  54,744 km or 13,730,624 rev.

HDRE1280 with 4x THJR95 bearings ($$)

  25,000 km or 6,273,378 rev.

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Sample Life Calculations - Time

Duty Cycle: Automation Turn-‐‑Table   Index and stop for assembly operations

•  Operate for 16 hours/day ~ 2,000 full revolutions   Cycle time about 30 seconds

Example 1: 4x THJR120 15,961,876 rev. ÷ 2,000 rev. = 7,980 days ÷ 365 day/year = 21.8 years

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Example 2: 6x THJR95 13,730,624 rev. ÷ 2,000 rev. = 6,865 days ÷ 365 days/year = 18.8 years

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Example 1: 4x THJR120 ($$$$) 15,961,876 rev. ÷ 2,000 rev. = 7,980 days ÷ 365 day/year = 21.8 years

Example 2: 6x THJR95 ($$$) 13,730,624 rev. ÷ 2,000 rev. = 6,865 days ÷ 365 days/year = 18.8 years

Example 3: 4x THJR95 ($$) 6,273,378 rev. ÷ 2,000 rev. = 3,136 days ÷ 365 days/year = 8.6 years

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End of Life

What happens when life estimate is reached?   Replace the guide wheel bearings

•  Single bolt to remove/replace

  Ring can typically last 2x the wheel bearing life •  Example with 8 years bearing life = 16 years ring life!

  Lubricate and clean vee surfaces to ensure life

Bearing replacement

Lubricator housings

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Lubrication and Maintenance Intervals

Lubricate vee surfaces with light oil Relubricate at intervals to prevent running dry •  Rarely less than 3 months •  Can be as long as 9 months •  Can be automatic with a central lubrication system

Clean debris   Wiping felts move debris

Slewing bearings (typical)   Continuous operation 40 hours / week

•  Inspect & relubricate every 6 weeks

Lubricator housings

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Summary Bishop-‐‑Wisecarver Group

  Introduction   Range of products

An Alternative to Slewing Ring Bearings   Key features and design concepts of vee rings   Heavy capacity vee guide wheels and rings meet design criteria for slewing bearing applications   How vee technology can meet your bearing life expectations

•  Minimize installation time & extend service maintenance intervals

#DWwebinar

Whitepaper

Download the whitepaper www2.bwc.com/Slewing-‐‑Bearing-‐‑Alternatives

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Engineering Assistance One-‐‑on-‐‑one assistance from experience engineers

Ariel OrielApplications Engineer

Ben DomingoApplications Engineer

Dan FletcherApplications Engineer

Justin SchubertApplications Engineer

Toll Free: 1 (888) 580-‐‑8272

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Heavy Duty Ring and Track – HDRT Product Line   Timing belt tooth profile on external surface

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Miles Budimir Senior Editor Design World [email protected]

Finally! An Alternative to Slewing Ring Bearings with Heavy Duty Rings and Vee Guide Wheels

Brian Burke Product Manager Bishop-Wisecarver Group [email protected]

Questions?

@DW_Motion

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Thank You q  This webinar will be available at

designworldonline.com & email

q  Tweet with hashtag #DWwebinar

q  Connect with Design World

q  Discuss this on EngineeringExchange.com