huong dan thiet ke van khuon go

Ngày tải lên: 19/05/2014, 10:45

Ngày tải lên: 24/03/2014, 14:29

... bắt đầu khi nhận được đơn hàng của khách hàng, ta có thể nghĩ nó giống như một danh mục mua sắ m. Mỗi đầu mục trong danh sách đó được xem như một lệnh lấy hàng (order-line) và thông thường bao ... tồn kho hay không và xác minh bất kỳ sự thiếu hụt nào về hàng hóa. Ngoài ra, hệ thống quản lý kho hàng có thể tổ chức lại danh sách để phù hợp với mặt bằng và sự vận hành của kho hàng để đạ t ... mã hóa có thể được tiến hành bằng việc lập danh bạ mã hóa dữ liệu như sau: - Xác định loại câu trả lời cho những câu hỏi tương ứng. - Xây dựng một danh mục liệt kê các câu trả lời. - Gán cho...

Ngày tải lên: 15/04/2014, 22:00

Ngày tải lên: 09/05/2014, 21:50

Ngày tải lên: 27/06/2014, 14:20

... is the design of any complex mechanical system like a motor car. (f) Element design. It is the design of any element of the mechanical system like piston, crankshaft, connecting rod, etc. (g) ... The idea is then studied keeping in mind its commercial success and given shape and form in the form of drawings. In the preparation of these drawings, care must be taken of the availability of ... 7850 Tin 7400 Brass 8450 Aluminium 2700 Copper 8900 Nickel 8900 Cobalt 8850 Monel metal 8600 Bronze 8730 Molybdenum 10 200 Tungsten 19 300 Vanadium 6000 Anti-clockwise moment = 300 N × 2m = 600...

Ngày tải lên: 05/07/2014, 14:20

... 18 per cent nickel and 8 per cent chromium (b) 18 per cent chromium and 8 per cent nickel (c) 18 per cent nickel and 8 per cent vanadium (d) 18 per cent vanadium and 8 per cent nickel 11. Ball ... production markets such as washing machines, oil burners, refrigerators, radios, photographs, television, business machines, etc. 2.362.36 2.362.36 2.36 Nickel Base AlloysNickel Base Alloys Nickel Base ... most important nickel base alloys are discussed below: 1. Monel metal. It is an important alloy of nickel and copper. It contains 68% nickel, 29% copper and 3% other constituents like iron, manganese,...

Ngày tải lên: 05/07/2014, 14:20

... coupling, spigots and recesses, gear rings clamped to steel hubs, etc. True transition fit (light keying fit)—used for keyed shaft, non-running locked pins, etc. Medium keying fit. Heavy keying fit—used ... Machine Design n 73 Light keying fit (true transition) for keyed shafts, non-running locked pins, etc. Medium keying fit. Heavy keying fit (for tight assembly of mating surfaces). Light ... fit. Normal running fit. Close running fit or sliding fit, also spigot and location fit. Precision sliding fit. Also fine spigot and location fit. Push fit for very accurate location with easy...

Ngày tải lên: 05/07/2014, 14:20

... point A, the curve slightly deviates from the straight line. It is thus obvious, that Hooke's law holds good up to point A and it is known as proportional limit. It is defined as that stress ... S.I. units, it is usually expressed in GPa i.e. GN/m 2 or kN/mm 2 . It may be noted that Hooke's law holds good for tension as well as compression. The following table shows the values of modulus ... falues of E f alues of E falues of E f alues of E f or the commonly used engor the commonly used eng or the commonly used engor the commonly used eng or the commonly used eng ineerineer ineerineer ineer ing...

Ngày tải lên: 05/07/2014, 14:20

... of the load induces tensile stress on the upper surface of the bracket and compressive stress on the lower surface of the bracket. ∴ Maximum bending stress on the upper surface due to horizontal component, ... examples of eccentric loading, from the subject point of view, are C-clamps, punching machines, brackets, offset connecting links etc. Fig. 5.19. Eccentric loading. Consider a short prismatic bar ... induces tensile stress on the upper surface and compressive stress on the lower surface of the bracket. ∴ Maximum bending stress on the upper surface due to vertical component, σ bV = 2 V 33 551...

Ngày tải lên: 05/07/2014, 14:20

... vf m ue K FS FS σ× σ  =+  σσ  6.206.20 6.206.20 6.20 Goodman Method forGoodman Method for Goodman Method forGoodman Method for Goodman Method for CombinaCombina CombinaCombina Combina tion ... of minimum ultimate strength according to 1. Gerber relation; 2. Modified Goodman relation; and 3. Soderberg relation. Take yield strength = 0.55 Ultimate strength; Endurance strength = 0.5 Ultimate ... 2 ±+×× ± = × = 924.35 MN/m 2 Ans. (Taking +ve sign) 2. According to modified Goodman relation We know that according to modified Goodman relation, 1 mv ue FS σσ =+ σσ or 1 75 225 525 20.5 uuu =+ = σσσ ∴σ u =...

Ngày tải lên: 05/07/2014, 14:20

... mm Oil is frequently transported by ships called tankers. The larger tank- ers, such as this Acrco Alaska oil transporter, are known as super- tankers. They can be hundreds of metres long. 242 ... equation (iii) to permit reboring after wear has taken place. Therefore t = 1 6to12mm 2 t pd × + σ 2. In constructing large pressure vessels like steam boilers, riveted joints or welded joints ... the value of circumferential stress (σ t1 ) may be taken 0.8 times the yield point stress (σ y ) and for brittle materials, σ t1 may be taken as 0.125 times the ultimate tensile stress (σ u ). 4....

Ngày tải lên: 05/07/2014, 14:20

... joint (b) spigot and socket joint (c) socket or a coupler joint (d) nipple joint 5. The pipes which are burried in the earth should be joined with (a) union joint (b) spigot and socket joint (c) ... movers (d) all of the above Pipes and Pipe Joints n 267 4. Spigot and socket joint. A spigot and socket joint as shown in Fig. 8.5, is chiefly used for pipes which are buried in ... flanges and pipes in this category are strong enough for service under pressures ranging up to 47.5 N/mm 2 . In all the above classes, the joint is of the spigot and socket type made with a jointing...

Ngày tải lên: 05/07/2014, 14:20

... FulleringCaulking and Fullering Caulking and Fullering In order to make the joints leak proof or fluid tight in pressure vessels like steam boilers, air receivers and tanks etc. a process known as ... edges at A and Caulking tool Caulked rivet C A B ( ) Caulking.a ( ) Fullering.b 80º Fullering tool Fig. 9.12. Caulking and fullering. Caulking process is employed to make the joints leak proofs or ... shear are 1.8 times stronger than in single shear and the joint does not fail by crushing. Make a sketch of the joint showing all calculated values. Calculate the efficiency of the joint. Solution....

Ngày tải lên: 05/07/2014, 14:20

... Ans. Size of fillet weld at the bottom of the bracket Let s 2 =Size of the fillet weld at the bottom of the bracket. The fillet weld at the bottom of the bracket is designed for the vertical force (P VB ) ... up a small part that has broken off such as gear tooth or to repair a worn surface such as a bearing surface. Welded Joints 341 1. Introduction. 2. Advantages and Disadvantages of Welded Joints ... P HA =750 / 75 = 10 kN Size of the fillet weld at the top of the bracket Let s 1 =Size of the fillet weld at the top of the bracket in mm. We know that the resultant force at A, P A = 22 22 VA HA (...

Ngày tải lên: 05/07/2014, 14:20

Ngày tải lên: 05/07/2014, 14:20

Ngày tải lên: 05/07/2014, 14:20

Ngày tải lên: 05/07/2014, 14:20

Ngày tải lên: 05/07/2014, 14:20

Ngày tải lên: 05/07/2014, 14:20