fasteners end and edge distances

... Connection design Bolt data Hole sizes Bolt strengths Spacing, end and edge distances Maximum centres of fasteners Maximum edge distances Back marks in channel flanges Back marks in angles Cross ... Cardiff and Birmingham and lectured at The University of the Witwatersrand In the USA he worked on the development of weldable high-strength and alloy steels with International Nickel and US Steel and ... Lanarkshire; and the Hongkong and Shanghai Bank, Hong Kong He is a project director of Ove Arup and Partners Alan Hayward Alan Hayward is a bridge specialist and is principal consultant of Cass Hayward and...

Ngày tải lên: 23/03/2014, 21:09

... 172, 1958, pp 87-112 Niemann, G and Baethge, J., 'Transmission error, tooth stiffness, and noise of parallel axis gears.' VDI-Z, Vol 2, 1970, No and No Palmer, D and Munro, R.G., 'Measurements ... 2.8 Harris map of interaction of elastic deflections and long tip relief This explanation of the handover process was developed by Harris [3] and the diagrams of the effects of varying load are ... short, or intermediate relief In 1970, Neimann in Germany [4] and Munro in the U.K introduced and developed the ideas of "long" and "short" relief designs for the two extreme load cases where...

Ngày tải lên: 13/12/2013, 03:15

... Understanding Gear Noise, J Derek Smith Chains for Power Transmission and Material Handling: Design and Applications Handbook, American Chain Association Corrosion and Corrosion Protection Handbook, ... Selection and Application, Duane Tandeske 73 Zinc Handbook: Properties, Processing, and Use in Design, Frank Porter 74 Thermal Fatigue of Metals, Andrzej Weronski and Tadeusz Hejwowski 75 Classical and ... Revised and Expanded, Earl Logan, Jr 86 Vibrations of Shells and Plates: Second Edition, Revised and Expanded, Werner Soedel 87 Steam Plant Calculations Manual: Second Edition, Revised and Expanded,...

Ngày tải lên: 13/12/2013, 03:15

... range has been extended to include the 16 and 31.5 Hz octave bands Secondly, the high frequency range at 2,000 and 4,000 Hz is significantly less permissive, and the 8,000 Hz octave band has been ... 16-in centers Fill and tape Joints and edges; finish as desired For equal width metal studs, add dB in all bands and to STC Type One layer 5/8-in thick gypsum wallboard on outer edges of staggered ... used with the knowledge and permission of the proprietors and is acknowledged as such at point of use Anyone wishing to make further use of any copyrighted material, by itself and apart from this...

Ngày tải lên: 28/03/2014, 18:20

... Understanding Gear Noise, J Derek Smith Chains for Power Transmission and Material Handling: Design and Applications Handbook, American Chain Association Corrosion and Corrosion Protection Handbook, ... Selection and Application, Duane Tandeske 73 Zinc Handbook: Properties, Processing, and Use in Design, Frank Porter 74 Thermal Fatigue of Metals, Andrzej Weronski and Tadeusz Hejwowski 75 Classical and ... Revised and Expanded, Earl Logan, Jr 86 Vibrations of Shells and Plates: Second Edition, Revised and Expanded, Werner Soedel 87 Steam Plant Calculations Manual: Second Edition, Revised and Expanded,...

Ngày tải lên: 03/07/2014, 12:20

... the ability to expand axially reduces the effective Young's modulus and high angle helical gears have reduced contact support at one end and additional buttressing at the other end 13 14 Chapter ... accurate knowledge of the pitch radius and this depends on the centre distance at which the pair of gears will run The main choice in profile design is between giving both tip and root relief ... each with tip relief extending a third of the way down (but no root relief), and mesh them All distances along the profile are in terms of roll distance, not actual distance, and so are proportional...

Ngày tải lên: 03/07/2014, 12:20

... Understanding Gear Noise, J Derek Smith Chains for Power Transmission and Material Handling: Design and Applications Handbook, American Chain Association Corrosion and Corrosion Protection Handbook, ... Selection and Application, Duane Tandeske 73 Zinc Handbook: Properties, Processing, and Use in Design, Frank Porter 74 Thermal Fatigue of Metals, Andrzej Weronski and Tadeusz Hejwowski 75 Classical and ... Revised and Expanded, Earl Logan, Jr 86 Vibrations of Shells and Plates: Second Edition, Revised and Expanded, Werner Soedel 87 Steam Plant Calculations Manual: Second Edition, Revised and Expanded,...

Ngày tải lên: 05/08/2014, 09:20

... Understanding Gear Noise, J Derek Smith Chains for Power Transmission and Material Handling: Design and Applications Handbook, American Chain Association Corrosion and Corrosion Protection Handbook, ... Selection and Application, Duane Tandeske 73 Zinc Handbook: Properties, Processing, and Use in Design, Frank Porter 74 Thermal Fatigue of Metals, Andrzej Weronski and Tadeusz Hejwowski 75 Classical and ... Revised and Expanded, Earl Logan, Jr 86 Vibrations of Shells and Plates: Second Edition, Revised and Expanded, Werner Soedel 87 Steam Plant Calculations Manual: Second Edition, Revised and Expanded,...

Ngày tải lên: 05/08/2014, 09:20

... vibration isolators Of these approaches, (c) and (d) are very expensive and tend to be temperamental and delicate or impracticable so this book concentrates on (a) and (b) as the important approaches, ... cones Single helical gears (and right angle drives) give axial forces and, unfortunately, the end panels of gearcases are often flat and are rather flexible The resulting end panel vibrations are ... the ability to expand axially reduces the effective Young's modulus and high angle helical gears have reduced contact support at one end and additional buttressing at the other end 13 14 Chapter...

Ngày tải lên: 05/08/2014, 09:20

... vibration isolators Of these approaches, (c) and (d) are very expensive and tend to be temperamental and delicate or impracticable so this book concentrates on (a) and (b) as the important approaches, ... cones Single helical gears (and right angle drives) give axial forces and, unfortunately, the end panels of gearcases are often flat and are rather flexible The resulting end panel vibrations are ... the ability to expand axially reduces the effective Young's modulus and high angle helical gears have reduced contact support at one end and additional buttressing at the other end 13 14 Chapter...

Ngày tải lên: 05/08/2014, 09:20

... 172, 1958, pp 87-112 Niemann, G and Baethge, J., 'Transmission error, tooth stiffness, and noise of parallel axis gears.' VDI-Z, Vol 2, 1970, No and No Palmer, D and Munro, R.G., 'Measurements ... axial pitch and a small helix angle This simple analysis ignores any end relief effects or tip relief effects and assumes a constant loading along the contact line Practical teeth tend to give ... is determined by taking moments about one end and is approximately (r-l)2/2r + \!2r which is [(r-l) +l]/2r from one end This has a minimum when r is V2 and the centre offeree oscillates about 086...

Ngày tải lên: 05/08/2014, 09:20

... 172, 1958, pp 87-112 Niemann, G and Baethge, J., 'Transmission error, tooth stiffness, and noise of parallel axis gears.' VDI-Z, Vol 2, 1970, No and No Palmer, D and Munro, R.G., 'Measurements ... axial pitch and a small helix angle This simple analysis ignores any end relief effects or tip relief effects and assumes a constant loading along the contact line Practical teeth tend to give ... is determined by taking moments about one end and is approximately (r-l)2/2r + \!2r which is [(r-l) +l]/2r from one end This has a minimum when r is V2 and the centre offeree oscillates about 086...

Ngày tải lên: 05/08/2014, 09:20

... expanding thermally more in the middle than at the ends, which are better cooled Chapter 44 Tooth with helix correction and end relief Fig 4.6 Different helix corrections In this discussion, end ... interference by an amount endrel * (x 0.5 ff), provided this is positive (or if negative); endrel is the amount of end relief and ff is the length efface width that has no end relief Fig 4.8 shows ... predominantly a question of specifying the tip reliefs on wheel and pinion Old designs tended to give a tip relief extending down to the pitch line and roughly parabolic, so the relief was roughly proportional...

Ngày tải lên: 05/08/2014, 09:20

... expanding thermally more in the middle than at the ends, which are better cooled Chapter 44 Tooth with helix correction and end relief Fig 4.6 Different helix corrections In this discussion, end ... interference by an amount endrel * (x 0.5 ff), provided this is positive (or if negative); endrel is the amount of end relief and ff is the length efface width that has no end relief Fig 4.8 shows ... predominantly a question of specifying the tip reliefs on wheel and pinion Old designs tended to give a tip relief extending down to the pitch line and roughly parabolic, so the relief was roughly proportional...

Ngày tải lên: 05/08/2014, 09:20

... generated in line 33 and is stored for plotting and to be used to calculate accelerations in lines 37 to 40 Accelerations and velocities are multiplied by the time increment and are added to existing ... dynamics case are: (i) Inertias and moments of inertia These present no problems and are usually determined easily and accurately (ii) Support lateral stiffnesses and drive shaft torsional stiffnesses ... angles, velocities and angular velocities (which are all "known") and use them to calculate the bearing support forces, the interference between the gears at the gear mesh pitch point, and the relative...

Ngày tải lên: 05/08/2014, 09:20

... 2500 mV/g acceleration and so 250 mV per m s"2 and the velocity sensitivity is then 250 mV per mm s"1 At the other end of the scale, high frequencies give high accelerations and can be measured ... amplitudes of the pulses (to about V) and to slow down their rate of change of voltage Standard logic TTL pulses from the sensors rise and fall V in less than 0.5 us and this sudden change gives pickup ... variations possible on this theme and alternatively each encoder pulse train may be demodulated in the computer to extract the torsional vibration Sweeney and Randall [3] and Remond [4] describe different...

Ngày tải lên: 05/08/2014, 09:20

... 2500 mV/g acceleration and so 250 mV per m s"2 and the velocity sensitivity is then 250 mV per mm s"1 At the other end of the scale, high frequencies give high accelerations and can be measured ... amplitudes of the pulses (to about V) and to slow down their rate of change of voltage Standard logic TTL pulses from the sensors rise and fall V in less than 0.5 us and this sudden change gives pickup ... variations possible on this theme and alternatively each encoder pulse train may be demodulated in the computer to extract the torsional vibration Sweeney and Randall [3] and Remond [4] describe different...

Ngày tải lên: 05/08/2014, 09:20

... distance and the mass and speed limitations of large encoders In practice, for gear noise work, accuracy is not a limitation Choice between shaft mounting and coupling drive is not clear and depends ... have a flexible coupling at input and output The coupling needs to be robust to stand up to shop floor handling if on production but must be accurate Worms and wheels have the complication that ... accurate straight edge is used as a reference One bearing block is positioned against the edge and slip gauges are used to position the other bearing block so that it is exactly parallel and the correct...

Ngày tải lên: 05/08/2014, 09:20

... distance and the mass and speed limitations of large encoders In practice, for gear noise work, accuracy is not a limitation Choice between shaft mounting and coupling drive is not clear and depends ... have a flexible coupling at input and output The coupling needs to be robust to stand up to shop floor handling if on production but must be accurate Worms and wheels have the complication that ... accurate straight edge is used as a reference One bearing block is positioned against the edge and slip gauges are used to position the other bearing block so that it is exactly parallel and the correct...

Ngày tải lên: 05/08/2014, 09:20