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Expressions are derived for the roll-force P, and torque G, in strip-rolling under tension, as functions of the pressure distribution on the rolls and of the radius of the deformed arc of contact.By consideration of various artificial distributions of pressure the ratio G/P is shown to depend only slightly on the precise shape of the friction hill, and a linear relation is deduced …
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The roll radius is 200 mm, and the roll rotates at 200 rpm. Use j = 0.2. (10 points) Question: 9. Estimate the roll force and power for annealed low carbon steel strip 200mm wide and 10mm thick, rolled to a thickness of 6 mm. The roll radius is 200 mm, and the roll rotates at 200 rpm. Use j = 0.2. (10 points)
hy3s3 s төрлийн ачааллын үүр, хэмжих хүрээ 100кг ~ 2Т, хүчдэл ба шахалтын хүчний хэмжилт, сайн тогтвортой байдал, бага температурын зөрүүтэй. 2-хайлшин ган материал, сайн механик шинж чанартай.
Макрофагийн хөгжил. Макрофагууд нь моноцитууд гэж нэрлэгддэг цагаан эсээс үүсдэг . Моноцитууд нь хамгийн том цагаан цусны эс юм. Тэд ихэвчлэн бөөр хэлбэртэй байдаг ганц нэг бөөм байдаг ...
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Calculation of Spread, Elongation, Effective Roll Radius, Roll Force and Torque When Rolling in the Square-Diamond, Square-Oval and Round-Oval Passes. Yoshihiro SAITO 1), Yoichi TAKAHASHI 2), Kenzo KATO 1) 1) Faculty of Engineering, Osaka University 2) Kobe Works, Kobe Steel, Ltd. Released 2010/03/15 ...
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1. Introduction. Roll force is a key parameter in the process control of hot strip rolling, and its computational accuracy directly determines thickness precision, strip shape quality and rolling stability, .Therefore, the online calculation model of roll force with high accuracy is taken as the core for substantial studies at home and abroad, . ...
Typical roll separating force and roll torque data, as a function of the reduction and at various roll surface speeds (20 and 160 rpm, leading to surface velocities of 262 and 2094 mm/s) are shown in Figures 9.19–9.21, respectively.The lubricants and the emulsions used are also indicated in Figures 9.19–9.21.As expected, the roll forces and the torques increase as the …
From an approximate theory, equations are derived for roll force and torque with and without front and back tensions applied to the strip. Where tensions are applied the calculations for each pass take about an hour; without tensions, and with the use of curves given in this paper, they can be carried out in ten minutes. The accuracy of the calculations without tensions is within about …
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CPR бол Хятад дахь хамгийн шилдэг мэргэжлийн нэг цэгийн ачааллын эсийн үйлдвэрлэгч, ханган нийлүүлэгч, Shenzhen Cooperation Sensors Instruments Co., Ltd. нь зардал багатай цацрагийн төрлийн ачааны үүр, өндөр чанарын цацрагийн даацын эсийн ...
Молекулын түвшин Амьд биеийн бүтэц зохион байгуулалтын хамгийн анхны түвшин бөгөөд эсэд оршиж байгаа нуклейн хүчил, уураг, нүүрс ус, өөх тос, зэрэг молекулууд энэ түвшинг үүсгэдэг. Удмын ...
HISTORY. Founded in 1953, KELK is an ISO 9001:2015 certified organization, specializes in the design and manufacture of state-of-the-art electronic measurement equipment used mainly in steel and aluminum rolling mills, paper mills, and mining applications around the …
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that the predicted roll force and torque are in a good agreement with measured data, in comparison with conventional model being used. Accuracy of roll force is remarkably improved from 16.7 to 5.4% and that of roll torque is outstandingly enhanced from 26.0 to 6.3%. KEY WORDS: peening effect; roll force; roll torque; approximate model; plate ...
Трансформаторын ачааллын горим Хэрэв Трансформаторын хоёрдогч ороомогт цахилгаан энерги хэрэглэгчийг холбовол гүйдэл гүйнэ . Хоёрдогч ороомгийн гүйдлийг Омын хуулиар илэрхийлбэл Анхдагч, хоёрдогч ороомгийн ...
Due to the growing importance of width control in strip and plate mills, edge rolling is currently an im-portant process in hot rolling mills. Research in edge rolling has been carried out, and in the present ar-ticle, models for roll force, torque, and lever arm coefficient are derived using the upper bound method. A simple, kinematically admissible deformation zone and velocity field ...
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Abstract. Equations are derived for the normal roll pressure, specific roll load and torque in hot rolling mills, using the condition for plastic deformation in rolling derived by Orowan, together with von Kármán's equation of equilibrium. Although applying strictly to the rolling of ideal plastic-rigid materials, these equations may be ...
барилгыг халаах нь нээлттэй халаалтын хэлхээний дулааны ачааллын тооцоонд дулааны эрчим хүчний тоолуурын байхгүй томъёо q = v * дагуу тооцно (t 1 - t 2) / 1000 Хаана:
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•Roll Force: F= LwY avg •Roll-strip contact length L •Average strip width w –despite the fact that spreading, or an increase in width, may actually occur if edger mills are not used •Average true stress of the strip in the roll gap Y avg •Assumes no friction and thus predicts lower roll force than the actual value •Power per roll ...
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Roll flattening: There is increase in radius of curvature of rolls due to the roll pressure which causes elastic deformation of rolls. This is known as roll flattening. Roll flattening leads to increase in contact length and hence an increase in roll force. The distorted roll radius is given by: R' = R[ -----5.10 C = 16(1- / . C = 2.16X10
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