Engineered Plastic Bearings for Automotive Applications
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Transcript of Engineered Plastic Bearings for Automotive Applications
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Engineered plastic bearings for automotive applications
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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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Moderator Presenters
Mary Gannon Design World
Nicole Lang igus Inc.
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• Make up and capabilities of engineered plastic bearings
• Automotive application requirements and material specifications
• Material selection process for automotive applications
This webinar will cover:
Engineered plastic bearings for automotive applications
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• igus® – 50+ years of polymer research and development
• Range of plastic bearings, linear bearings and guides, cable carriers, flexible cables
• Millions of “iglide®” bearings used by automotive OEM’s each year
• Recyclable, meet ELV regulations
• Made of composite polymers for high strength/wear resistance
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• Simple Polymers:
u Soft; weak when put against loads
u Have low COF (typically ≤.1)
u High wear rates
u Low melt temperature
Material Overview
[image credit: Stachowiak & Batchelor,, Engineering Tribology, 2005, 3rd Ed, Elsevier Inc., Chp. 16, Figs. 16.7, 16.9, and 16.26, pp. 657-‐‑672.]
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• Composite Polymers:
u Improved mechanical strength
u Improved wear-resistance
u Reduced COF
u Moldable, machinable
Material Overview
[image credit: Stachowiak & Batchelor,, Engineering Tribology, 2005, 3rd Ed, Elsevier Inc., Chp. 16, Figs. 16.7, 16.9, and 16.26, pp. 657-‐‑672.]
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Material Overview
friction wear
Parameters: P = 0.7 N/mm2, v = 0.15 m/s, case-hardened steel shaft
Simple vs. Composite polymers
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• Traditional bearing solution
u Metallic shell with lubricating layer
u Inside layer subject to destruction
u COF maintained only through internal layer thickness
Material Overview
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Material Overview
PTFE lined metal backed bearing vs. composite polymer bearing
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Material Overview
PTFE lined metal backed bearing vs. composite polymer bearing
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Material Overview
PTFE lined metal backed bearing vs. composite polymer bearing
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Alu hc Cf53 St37 V2A
igus J
igus L280
igus Z
DU
Parameters: Pressure = 1 MPa, Velocity = 0,01 m/s
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• Have high wear resistance
• Require little maintenance
• Provide thermal stability
• Resist corrosion
To succeed in automotive applications, plastic bearings must:
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• More than 5,000 individual experiments each year
• Industry’s largest test lab
• All results compiled into massive database
• Customized testing possible
igus Test Lab
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Automotive applications utilizing plastic bearings Lower stress
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Automotive applications utilizing plastic bearings Lower stress
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Automotive applications utilizing plastic bearings Lower-Medium stress
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Automotive applications utilizing plastic bearings Lower-Medium stress
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Automotive applications utilizing plastic bearings Medium Stress
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Automotive applications utilizing plastic bearings Medium Stress
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Automotive applications utilizing plastic bearings Medium Stress
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Automotive applications utilizing plastic bearings Medium Stress
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Automotive applications utilizing plastic bearings Medium Stress
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Automotive applications utilizing plastic bearings Medium Stress
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Automotive applications utilizing plastic bearings Heavy Stress
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Automotive applications utilizing plastic bearings Heavy Stress
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Automotive applications utilizing plastic bearings Heavy Stress
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Automotive applications utilizing plastic bearings Heavy Stress
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Material Selection
Selection criteria should include: • Temperature
• Static surface pressure
• Counter-face roughness
• Speed
• Wear factor (k)
• Max PV value
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Material Selection
PV value is the most critical factor when specifying a plastic bearing PV value: friction heat created when the shaft moves inside the bearing = pressure x speed
Via the bearing into the housing
Via the shaft outside the bearing
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Material Selection
High pressure materials
High Temperature materials
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Material Selection
Conductive materials for e-coating
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Material Selection
• iglide Product Selector
• dry-tech Sample Box
• www.igus.com/iglide
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Questions? Mary Gannon Design World [email protected] Phone: 440.234.4531 Twitter: @DW_MaryGannon
Nicole Lang igus Inc. [email protected] Phone: 401-438-2200 Twitter: @igus_Inc
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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