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Carbon Fiber Indexer Performance Comparisons

 

 

                    
    

Indexer Performance with Aluminum and Carbon Dial Table

    
     LeapTech defines Indexer Performance as the number of table index’s per minute with respect to the life (B10 torque capacity on the indexer).     
  LeapTech has provided an Indexer performance comparison between Aluminum and Carbon Dial Tables. The following diameters, 24″, 36″ and 72″ were compared. The Aluminum dial table was 1″ thick and the Carbon Dial Table was 1.152″ (CFCD-001-1000A-R02)   
  Indexer performance was determined from 50 to 300 index’s/min. Indexer performance was based on the B10 Torque Capacity allowable.   
  While each individual Indexer manufacturer has there own Torque Capacity requirements, LeapTech provides a generic B10 Torque Capacity covering a range from 5,000 in.lb to 20,000 in.lb. This B10 torque capacity was at indexer performance of 50 index’s/min.   
   Dial Table Diameter, in B10 Torque Capacity of the Indexer @ 50 index’s/min 50% Reduction in B10 Torque Capacity       
   24 5000 2500       
   36 10000 5000       
   72 20000 10000       
  To ensure no operational problems arise from the indexer, it is normal custom and practice to reduce the B10 Torque Capacity to 50% of the indexer’s manufacturers value.    
  To account for reduction in B10 Torque capacity at higher index rate performance levels and not violate proprietary indexer manufacturers B10 life estimations a simple linear relationship was assumed by LeapTech.    
 Life Reduction due to index per Minute          
   LeapTech linear B10 Torque Capacity requirements for index rates higher than 50 index’s/min.  
   The B10 Torque Capacity is a indication of indexer life in hours. The number of hours is proprietary to the indexer manufacturer.   
    Dwell Index Dial Table Graphic             
       A common index was selected that had a 270 degree indexing period and a 90 degree dwell period  
       A single rotation of the Camshaft completes a index and dwell.  
 Trapezoidal Motion Velocity vs Time picture            
    A simple trapezoidal motion was assumed for the performance analysis, 1/3 acceleration, 1/3 constant velocity and 1/3 deceleration.
   The indexer performance was estimated for a 24″, 36″ and 72″ diameter 1″ thick aluminum dial table and compared with the performance of a CFCD-001-1000A-R02 (1.152″) carbon fiber disc.   
 Carbon Composite manufacturing, Carbon Fiber performance comparison, Carbon Fiber parts.  A six station indexer was used to determine performance with a tooling inertia of 8 lb.in.s^2. (3,088 lb.in^2)
   The tooling inertia relates to total tooling loads of 33lb (24″ Diameter), 15 lb (36″ Diameter) and 4lb (72″ Diameter)
   Using the B10 Torque Capacity as a Indexer Performance allowable, the Indexer’s performance ceiling can be obtained with respect to the number of index’s per minute.    
Carbon Fiber Indexer Performance 24" Dial Table         
  The maximum number of index’s-parts per minute possible from a 24″ diameter Aluminum Dial table was about 200. The maximum number of index’s-parts possible from a 24″ diameter Carbon Dial Table was 258.  
Carbon Fiber Indexer Performance 36" Dial Table         
  The maximum number of index’s-parts per minute possible from a 36″ diameter Aluminum Dial table was about 175. The maximum number of index’s-parts possible from a 36″ diameter Carbon Dial Table was 275.   
Indexer Performance 72" Carbon Fiber Dial Table         
  The maximum number of index’s-parts per minute possible from a 72″ diameter Aluminum Dial table was about 145. The maximum number of index’s-parts possible from a 72″ diameter Carbon Dial Table was 260.  

 

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