399 [Step 1] Confirm Usage Condition Confirm that the following conditions are met. Temp.: -10°C ~ +80°c Chain Velocity: 5~15m/min Conveyor Length: 15m or less Environment: No abrasive dusts, corrosive gasses, or high humidity [Step 2] Determine Chain Based on the result from calculation of conveyed object mass per square meter, select a chain that satisfies the requirements for the allowable load mass. WA(kg/m)=(W1+W2)/PL WA: Conveyed Object Mass per Square Meter (Kgf) W1: Workpiece Mass (kgf) W2: Pallet Mass (kgf) PL: Pallet Travel Length (m) [Step 1] Calculate Effective Tension (Fe) Fe=g · (m · Lc · μR + (m + M) · (Lc-A) · μR + MA · A · (μc + μR)+m · A · μR) Fe: Effective Tension (N) Lc: Conveyor Length (m) A: Accumulation Length (m) * A=0 when there is no Accumulation. M: Mass of Conveyed Object MA: Mass of Conveyed Object for Accumulation Section m: Chain Mass (kg/m) μc: Dynamic Friction Coefficient between Chain and Conveyed Object μR: Dynamic Friction Coefficient between Chain and Rail g: Gravitational Acceleration=9.80665 (m/sec2) *The Friction Coefficients above are estimated values with safety ratio added, so those values serve as element for tension calculation. [Step 2] Calculate Post-adjusted Tension based on conditions Fs=Fe · Cs Fs: Post-adjusted Tension (N) Cs: Load Correction Factor For frequent starts and stops =1.2 For wear intensive applications =1.2 For multiple row use =1.25 For other than above =1.0 [Step 3] Calculate Chain Allowable Tension Fadm=FN · Va · Ta Fadm: Allowable Tension (N) FN: Max. Allowable Tension (N) Va: Velocity Factor Ta: Temperature Factor QSelection Procedure for Double Speed Chains QSelection Procedure for Table Top Conveyor Chains [Step 3] Confirm Allowable Tension Table 1 Allowable Load Mass Chain Allowable Load Mass (kgf/m) WCHE3 30 WCHE4 55 WCHE5 75 Table 3 Velocity Factor Table Chain Velocity m/min. Factor K1 1~4 or less 1.0 Over 4, 8 or less 1.1 Over 8, 10 or less 1.2 Over 10, 14 or less 1.5 Over 14, 18 or less 1.6 Table 4 Conveyed Object Load Factor Average Conveyed Object Weight Wa (kg/m) Factor K2 30 or less 1.00 31~40 1.10 41~50 1.15 51~70 1.20 71~90 1.25 91~120 1.35 Table 5 Max. Allowable Tension for Double Speed Chains Chain Velocity m/min. Allowable Tension (kN) WCHE3 0.55 WCHE4 0.88 WCHE5 1.37 Table 2 Friction Coefficient of Double Speed Chains Friction Coefficient fa 0.10 fc 0.08 fr 0.20 T=G/1000×{(Hw+Cw)L1 · fc+Aw · L2 · fa+(Aw+Cw)L2 · fr+1.1Cw(L1+L2) · fc} T: Max. Tension Applied on Chain (kN) L1: Transfer Section Length (m) L2: Accumulation Section Length (m) Hw: Conveyed Object Mass on Transfer Section, including that of pallets (kg/m) Aw: Conveyed Object Mass on Accumulation Section, including that of pallets (kg/m) Cw: Chain Weight (kg/m) fa: Friction Coefficient between conveyed object and Chain During Accumulation fc: Friction Coefficient between Chain and Rail fr: Friction Coefficient between Chain and Rail During Accumulation G: Gravitational Acceleration=9.80665 (m/s2) Multiply the max. tension applied to a chain (T) by the velocity factor (K1) and the conveyed object load factor (K2). For Free Flow Conveyors , which are generally designed to have two chains installed, calculate the tension for each of the two chains. Allowable Chain Tension ≥ (T×K1×K2)/2 If the calculated result exceeds the allowable tension of selected chain, re-select a chain one size larger or re-calculate with conveyor length divided into shorter sections. Table 1 Friction Coefficient Lubrication Method Material of Conveyed Object Steel Aluminum Glass Paper Plastic Dry 0.25 0.2 0.15 0.3 0.2 Soap Water 0.15 0.12 0.1 − 0.15 Lubrication Method Gide Rail Material Steel Stainless steel UHMW Polyethylene Nylon Dry 0.2 0.2 0.15 0.2 Soap Water 0.12 0.12 0.1 0.14 L2 Accumulate Section Transfer Section L1 [Step 4] Compare Allowable Tension and Post-adjusted Tension If Fs≤Fadm, the selection is applicable. [Step 5] Calculating Required Power P=Fs · V/(60 · ) P: Required Power (W) V: Chain Velocity (m/min) : Transmission Efficiency Table 2 Maximum Allowable Tension Type Nominal Max. Allowable Tension (N) TPCH 826 1650 1143 0 20 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 40 Chain Speed (m/min) Speed Coefficient (Va) 60 80 100 120 140 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 20 40 Temp. Around Drive Sprocket 60 80 100 Temperature Coefficient (Ta) Table 3 Velocity Factor Table 4 Temperature Factor Chain Double Speed Chain /TableTop Conveyor Chain Selection
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