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Text Book of Machine Design P29
Ngày tải lên :
25/10/2013, 13:15
... width ranges from 20 m to 30 m b = Fig 29.2 Face width of helical gear 1068 n A Textbook of Machine Design In single helical gears, the helix angle ranges from 20° to 35°, while for double helical ... N/mm2 Module and face width Let m = Module in mm, and b = Face width in mm 1070 n A Textbook of Machine Design Since both the pinion and gear are made of the same material (i.e cast steel), therefore ... gear, T = P × 60 35 × 103 × 60 = = 223 N-m = 223 × 103 N-mm 2πN π × 1500 1072 n A Textbook of Machine Design Formative or equivalent number of teeth, TG 24 24 = = = 37 T'E = 3 cos α cos 30° (0.866)3...
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Text Book of Machine Design P30
Ngày tải lên :
29/10/2013, 20:15
... angle other than a right angle, then they are known as angular bevel gears 1082 n A Textbook of Machine Design Crown bevel gears When the bevel gears connect two shafts whose axes intersect at an ... given by Dd = DP – 2d cos θP where Dd = Inside diameter, and d = Dedendum 1084 n A Textbook of Machine Design 30.4 Determination of Pitch Angle for Determina mination for Bevel Gears Consider a ... number of teeth on the gear = where RB m Pitch circle diameter Module 1086 n A Textbook of Machine Design Notes : The action of bevel gears will be same as that of equivalent spur gears Since...
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Text Book of Machine Design P31
Ngày tải lên :
29/10/2013, 20:15
... such that tan φ1 = µ A gear-cutting machine is used to cut gears 1108 n A Textbook of Machine Design The coefficient of friction varies with the speed, reaching a minimum value of 0.015 at a π ... gear, when the shafts are at right angles Fig 31.3 Worm and Worm gear 1104 n A Textbook of Machine Design Lead It is the linear distance through which a point on a thread moves ahead in one ... normal lead (lN) is used, such that lN = l cos λ Worm gear teeth generation on gear hobbing machine Helix angle It is the angle between the tangent to the thread helix on the pitch cylinder...
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Tài liệu Text Book of Machine Design P1 docx
Ngày tải lên :
26/12/2013, 00:17
... 2 n 1.2 A Textbook of Machine Design Classifications of Machine Design The machine design may be classified as follows : Adaptive design In most cases, ... Considerations in Machine Design Following are the general considerations in designing a machine component : Type of load and stresses caused by the load The load, on a machine component, may ... operations and to draft methods for casting, handling and machining special parts 10 Number of machines to be manufactured The number of articles or machines to be manufactured affects the design in a...
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Tài liệu Text Book of Machine Design P2 docx
Ngày tải lên :
26/12/2013, 00:17
... a casting is chilled intentionally and sometimes chilled becomes accidently to a considerable depth The intentional chilling is carried out by putting inserts of iron or steel (chills) into the ... rapid machining is the prime requirement It may be noted that the presence of sulphur and phosphorus causes long chips in machining to be easily broken and thus prevent clogging of machines Now ... castings * When filing or machining cast iron makes our hands black, then it shows that free graphite is present in cast iron 22 n A Textbook of Machine Design are chilled at their outer skin...
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Tài liệu Text Book of Machine Design P3 pptx
Ngày tải lên :
26/12/2013, 00:17
... 54 n A Textbook of Machine Design Machining processes The processes used for giving final shape to the machine component, according to planned dimensions are known as machining processes The ... drilling, boring, reaming, sawing, broaching, milling, grinding, hobbing, etc Surface finishing processes The processes used to provide a good surface finish for the machine component are known as surface ... used for medium size and large articles requiring very heavy blows The machine forging is done by means of forging machines The drop forging is carried out with the help of drop hammers and is...
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Tài liệu Text Book of Machine Design P4 ppt
Ngày tải lên :
26/12/2013, 00:17
... mm Ans 96 n A Textbook of Machine Design 4.10 Bearing Stress Bearing Stress A localised compressive stress at the surface of contact between two members of a machine part, that are relatively ... the action of the machine The original distance between the two reference points In addition to bearing the stresses, some is known as gauge length The strain is determined machine parts are made ... Stresses in Machine Parts n 101 Percentage elongation We know that percentage elongation = L − l 80 − 60 = = 0.25 or 25% Ans 80 L orking Stress 4.12 Working Stress When designing machine parts,...
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Tài liệu Text Book of Machine Design P5 ppt
Ngày tải lên :
26/12/2013, 00:17
... cutting head forward Archimedean screw lifts soil onto conveyer belt A tunnel-boring machine can cut through rock at up to one kilometre a month Powerful hydraulic rams force the machine’s cutting head ... I xx 15 Cross-section BH + bh I xx = A Textbook of Machine Design 13 Channel Section n I y 134 Section Torsional and Bending Stresses in Machine Parts n 135 Example 5.6 A pump lever rocking shaft ... Principal Stresses Application of Principal Stresses in Designing Machine Members There are many cases in practice, in which machine members are subjected to combined stresses due to simultaneous...
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Tài liệu Text Book of Machine Design P6 docx
Ngày tải lên :
23/01/2014, 06:20
... specimen, as shown in Fig 6.2 (a), is rotated in a fatigue Variable Stresses in Machine Parts n 183 testing machine while the specimen is loaded in bending As the specimen rotates, the bending ... defined as the safe maximum stress which can be applied to the machine part working under actual conditions We have seen that when a machine member is subjected to a completely reversed stress, the ... limit for the material of the machine member may be obtained by multiplying the endurance limit and the surface finish factor We see that Variable Stresses in Machine Parts n 185 for a mirror...
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Tài liệu Text Book of Machine Design P7 pdf
Ngày tải lên :
23/01/2014, 06:20
... splitting the cylinder into two cylindrical shells, as shown in Fig 7.1 (b) 226 n A Textbook of Machine Design Thus the wall of a cylindrical shell subjected to an internal pressure has to withstand ... at right angles to the axis of the cylinder is called transverse section 228 n A Textbook of Machine Design From equations (i) and (ii), we have !t2 × ∋(d.t = p ∀ ∋ (d ) p∀d or 4t If %c is the ... = 25 × 103 N ; !tc = 30 MPa = 30 N/mm2 : %H = 80% = 0.8 ; %P = 60% = 0.6 230 n A Textbook of Machine Design Thickness of pressure tank We know that thickness of pressure tank, t = ∀ 800 p.d #...
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Tài liệu Text Book of Machine Design P8 ppt
Ngày tải lên :
23/01/2014, 06:20
... 262 8.2 n A Textbook of Machine Design Stresses in Pipes The stresses in pipes due to the internal fluid pressure are determined ... mm (i.e when x = 150 mm), ∀ (150)2 # !t6 = %1 ∃ & + − + MPa Ans (150)2 ) ( 264 n A Textbook of Machine Design Fig 8.1 Radial stresses at radius 100 mm, 110 mm, 120 mm, 130 mm, 140 mm and 150 mm ... ‘C’ Material Cast iron Mild steel Zinc and Copper Lead Constant (C) in mm 266 n A Textbook of Machine Design Example 8.2 A seamless pipe carries 2400 m3 of steam per hour at a pressure of 1.4...
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Tài liệu Text Book of Machine Design P9 doc
Ngày tải lên :
23/01/2014, 06:20
... the plates are punched and reamed or drilled Punching is the cheapest method and is used for relatively thin plates and in structural work Since punching injures the material around the hole, therefore ... 282 n A Textbook of Machine Design The permanent fastenings are those fastenings which can not be disassembled without ... 9.2 Methods of riveting The plates are drilled together and then separated to remove any burrs or chips so as to have a tight flush joint between the plates A cold rivet or a red hot rivet is introduced...
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Tài liệu Text Book of Machine Design P10 docx
Ngày tải lên :
23/01/2014, 06:20
... 342 n A Textbook of Machine Design 10.2 Advantages and Disadvantages of Welded Joints over Riveted Joints Advantages Disadvantages ... by metal welding electrode The operator, with his eyes and face protected, strikes an arc by touching the work of base metal with the electrode The base metal in the path of the arc stream is ... parts to be jointed are first heated to a proper temperature in a furnace or 344 n A Textbook of Machine Design forge and then hammered This method of welding is rarely used now-a-days An electric-resistance...
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Tài liệu Text Book of Machine Design P11 doc
Ngày tải lên :
23/01/2014, 06:20
... smoothing wood Chisel for shaping wood Simple machine tools Note : This picture is given as additional information and is not a direct example of the current chapter 392 n A Textbook of Machine Design ... ball-peen hammer for shaping metal wooden mallet for tapping chisels claw hammer for driving in nails and pulling them out Simple machine tools Note : This picture is given as additional information ... Zinc-plated machine screw Chromium-plated wood screw Black painted wood screw Brass wood screw Nail plate for joining two pieces of wood Angle plate Corrugated fasteners for joining corners Simple Machine...
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Tài liệu Text Book of Machine Design P12 doc
Ngày tải lên :
23/01/2014, 06:20
... drive sockets (b) (b) Machine operated sockets Note : This picture is given as additional information and is not a direct example of the current chapter 446 n A Textbook of Machine Design Failure ... × t × ! c From this equation, the induced crushing stress may be checked 434 n A Textbook of Machine Design Failure of the socket in tension across the slot We know that the resisting area of ... diameter (d4) and maximum at the inner diameter (d2), as shown in Fig 12.8 436 n A Textbook of Machine Design The maximum bending moment occurs at the centre of the cotter and is given by d P d...
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Tài liệu Text Book of Machine Design P15 ppt
Ngày tải lên :
23/01/2014, 06:20
... details, please refer chapter on ‘Governors’ of authors’ popular book on ‘Theory of Machines’ 582 n A Textbook of Machine Design We know that reaction at the fulcrum F, RF = W # P2 = (682) # (502) ... levers is not recommended in engineering practice However a pair of tongs, the treadle of a sewing machine etc are examples of this type of lever 15.3 Design of a Lever The design of a lever consists ... on the lever are Load (W), Effort (P), and Reaction at the fulcrum F (RF) 560 n A Textbook of Machine Design The load and effort cause moments in opposite directions about the fulcrum The following...
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Tài liệu Text Book of Machine Design P16 ppt
Ngày tải lên :
27/01/2014, 15:20
... which have lengths more than 30 times their diameter are called long columns 602 n A Textbook of Machine Design derived an equation, for the buckling load of long columns based on the bending stress ... C !2 E ∀ 330 (l / k )2 % 9.87 % 0.21 % 106 (l / k ) ∀ 330 (Taking C = 1) 604 n A Textbook of Machine Design (l / k)2 = 6281 # l / k = 79.25 say 80 Hence if the slenderness ratio is less than ... ∋10 (200)3 ( (400 – 20) 103 = 2) ∗& 12 + 12 , = 13.36 × 106 mm4 Fig 16.3 606 n A Textbook of Machine Design Since IYY is less than IXX, therefore the section will tend to buckle about Y-Y axis...
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Tài liệu Text Book of Machine Design P17 docx
Ngày tải lên :
27/01/2014, 15:20
... of the motor = T.9 = 211.45 × 5.24 = 1108 W = 1.108 kW Ans Example 17.3 The cutter of a broaching machine is pulled by square threaded screw of 55 mm external diameter and 10 mm pitch The operating ... 1075 Nut (h) Area of core (Ac) mm2 (H) 2.5 3.5 2.75 3.25 3.75 346 531 855 628 n A Textbook of Machine Design d1 d D dc (46) 46 46.5 38 48 48 48.5 40 50 50 50.5 42 1385 52 52 52.5 44 1521 55 55 ... 14 7.25 16 8.5 1320 1521 1662 1810 1886 2124 2290 2463 2734 3019 3217 3421 630 n A Textbook of Machine Design d1 d D dc 85 (88) 90 (92) 95 (96) 85 88 90 92 95 96 86 89 91 93 96 99 67 70 72 74 77...
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Tài liệu Text Book of Machine Design P18 pptx
Ngày tải lên :
27/01/2014, 15:20
... 10 m/s as in agricultural machines and small machine tools Medium drives These are used to transmit medium powers at belt speeds over 10 m/s but up to 22 m/s, as in machine tools Heavy drives These ... A pulley which is keyed to the machine shaft is called fast pulley and runs at the same speed as that of machine shaft A loose pulley runs freely over the machine shaft and is incapable of transmitting ... drive a machine shaft by means of a belt The pulley on the engine shaft is of m diameter and that of the machine shaft is m diameter If the belt thickness is mm; determine the speed of the machine...
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Tài liệu Text Book of Machine Design P19 docx
Ngày tải lên :
27/01/2014, 15:20
... enables machine to be started or stopped at will A fast pulley is keyed to the machine shaft while the loose pulley runs freely The belt runs over the fast pulley to transmit power by the machine ... shifted to the loose pulley when the machine is not required to transmit power By this way, stopping of one machine does not interfere with the other machines which run by the same line shaft ... 716 n A Textbook of Machine Design 19.2 Types of Pulleys for Flat Belts Following are the various types of pulleys for...
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