Handbook of Machine Foundations Srinavaslu Vaidyanathan

Handbook of Machine Design P48

Handbook of Machine Design P48
... that you design 41.7.2 Three Positions of a Plane When three positions of a plane are specified by the location of line CD, as shown in Fig 41.9, it is possible to construct the center of a circle ... number of links (fixed link included) j = number of joints ft = /of /th joint K = integer = for plane, spherical, or particular spatial linkages = for most spatial linkages Since the majority of ... of links in a plane linkage are parallel, which leads to such special devices as the pantograph Considerable theory has evolved over the years about numerous aspects of linkages It is often of...
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Handbook of Machine Design P50

Handbook of Machine Design P50
... intelligently followed the cycle-profile procedure, a complete graphic portrayal of what should happen at any point in the cycle of operation of the machine is the result The designer should be able to ... of the many types of flow control valves in combination with one of the basic methods of flow control described previously Another approach takes advantage of the throttling characteristics of ... pump starts to move off stroke to reduce displacement The slope of the curve of this decreasing displacement can be controlled by the design of the compensator Thus, the designer can specify...
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Handbook of Machine Design P49

Handbook of Machine Design P49
... analysis in designing open-loop circuits and dynamic load analysis in designing closed-loop systems The cycle profile1 is the recommended technique for displaying the results of machine- cycle-load ... first step is to analyze the machine cycle This analysis turns out to be a timeand-motion study of the operation of the machine If an actual study is not available to the designer, she or he must ... diagrams of machine operations across the top of the sequence plot simplify the communication problem when one is trying to convey the meaning of the plot to persons other than the design group...
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Handbook of Machine Design P1

Handbook of Machine Design P1
... Much of the design work done is in a small part of one of the feedback or feedforward portions of the chart and thus is evolutionary Rarely will an individual designer start at the beginning of ... characteristic of the pro- TABLE 1.11 Elements of a Decision-Making Model Alternative courses of action States of nature: The environment of operation of the decision model The designer has very ... would be the design of a rigging system using wire rope to lift loads of 10 tons maximum The designer could preliminarily specify a design factor of 5, which would be the ratio of the wire rope...
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Handbook of Machine Design P52

Handbook of Machine Design P52
... incorporated in the design of machinery either by treating the sources of machine noise or by altering the structureborne and/or airborne paths of this noise This section contains a discussion of these ... fields in the vicinity of a noise source frequency of the sound, the dimensions of the source, and the phase relations of the various radiating parts of the source As a rule of thumb, the near field ... levels of hydraulic pumps Other Mechanical Components Machines are made up of a large variety of mechanical components and mechanisms, each of which should be considered from the perspective of source...
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Handbook of Machine Design P51

Handbook of Machine Design P51
... shallow tacked at rate of 10 mpy; commerdepths of Pacific off Panama Canal cial grade often corrodes at 100 Single phase brasses, silicon and times this rate, largely because of phosphor bronzes ... attack rate of the more active metal and decreases that of the less active metal An adverse area ratio is characterized by having a larger surface area of less active metal than that of the more ... attacked and plating or deposition of the less active one would occur This is based on the fact that solutions contain only unit activity (concentration) of ions of each of the two metals The standard...
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Handbook of Machine Design P3

Handbook of Machine Design P3
... Validity of mathematical models used to represent reality Intensity of stress concentrations Influence of time on strength and geometry Effect of corrosion • Effect of wear • Length of any list of ... magnitude, but in the pattern of variation Evidence gathered by measurement in pursuit of uniqueness of magnitude was really a mix of systematic and random effects It is the role of statistics to enable ... are lognormal, then the design factor n = S/a is lognormally distributed, since quotients of lognormal variates are also lognormal The coefficient of variation of the design factor n can be approximated...
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Handbook of Machine Design P2

Handbook of Machine Design P2
... affecting machines and their designers is most often filed under negligence or strict liability theories, both of which may allege the presence of a defect Thus a major concern of designers would ... representations of performance and operation (implied warranty); conduct of designers, manufacturers, sellers, and users (negligence); and the characteristics of the product exclusive of the conduct of all ... Processes The use of special processes or handling, such as methods of cleaning castings, impregnation of castings to prevent leakage of fluids, degreasing of finished parts, or protection of surfaces,...
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Handbook of Machine Design P54

Handbook of Machine Design P54
... are they designed as universal tools Industrial robots are designed with specific types of application in mind, and this fact very strongly influences the design of both hardware and software ... the design of mountings of the drive components and of the support bearings of the input and output shafts to ensure good service life Cycloidal drives, now on the market in several types, offer ... compliances of the servo actuators are usually at least comparable to those of the structural members Because of the complexity of the structure and the mass distribution resulting from the locations of...
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Handbook of Machine Design P53

Handbook of Machine Design P53
... nF = speed of first gear in train nL = speed of last gear in train HA = speed of arm The following example will illustrate the use of Eq (46.15) Example Refer to the planetary train of Fig 46.4 ... r/min of the left wheel is zero, the pitch point of gears and has a linear velocity twice that of the pin which supports the planet Therefore, the r/min of the right wheel is twice that of the ... reduction of 12/1 is required, the final gear in a simple train will have a diameter 12 times that of the first gear 46.2 GEARTYPESELECTION The disposition of the axes to be joined by the gear train often...
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Handbook of Machine Design P5

Handbook of Machine Design P5
... an indication of the development of systematic errors in the measuring system Measurement of the variable with two different measuring systems can often help detect the presence of a fixed error ... removal of the noise source, elimination of the noise by cancellation, minimization of the noise by division (filtering), and minimization of the noise by frequency-selective filtering Removal of ... particular type of precision index being used 3.9 ANALYSISOFDATA The basic problem in every quantitative experiment is that of obtaining the unbiased estimate (I of the true value JLI of a quantity...
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Handbook of Machine Design P4

Handbook of Machine Design P4
... intensity of one six-hundred-thousandth of a square meter of a radiating cavity at the temperature of freezing platinum (2042 K) under a pressure of 101 325 N/m2 The mole is the amount of substance of ... 3.6 DESIGNOFTHEMEASURINGSYSTEM The design of a measuring system consists of selection or specification of the transducers necessary to accomplish the detection, transmission, and indication of ... comparison of the length of the filament of thermometric fluid in the capillary tube with the temperature scale etched on the stem of the thermometer Another example of an element of a measuring...
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