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Slide 2 HISTORY The name football comes from the two words "foot" and "ball". It is named football because the players of the game walk and run (on foot) while playing, as opposed to polo and other games played on horseback. The ball is often kicked with the foot, but depending on the game, it can also be hit using other parts of the body (in ...
· 2. Ball mill consist of a hollow cylindrical shell rotating about its axis. Axis of the shell horizontal or at small angle to the horizontal It is partially filled with balls made up of Steel,Stainless steel or rubber Inner surface of the shell is lined with abrasion resistant materials such as Manganese,Steel or rubber Length of the mill is approximately equal to its diameter .
Ball end mills can produce a fillet. Formed milling cutters can be used to produce a variety of features including round edges. •Use More flutes for finer finish at lower MRR. Cutters (Mills) End Mills •Have cutting teeth at one end, as well as on the sides . Installing Removing Cutters •End mill cutters can be held by the spindle in several ways; a few of the ways are shown in the ...
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· The ball mill is a very noisy machine. 2. Wear occurs from the balls as well as from the casing, which may result in contamination of the product 16. Fluid Energy Mill Principle It works on the principle of impact and attrition. Construction It consists of a loop of pipe, which has a diameter of 20 to 200 mm, depending on the overall height of the loop, which may be upto .
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2. Drilling Related Operations • Geometry of Twist drill – Shank, Neck and Drill body – Helix angle, Point angle, Flute, cutting edge, Chisel edge, Margin • Cutting conditions. D v N. π Spindle: = Feed rate: r = f Nf. Metal Removal Rate: 4. 2 MRR =π. D f. r. Machining time: r m. f t A T + = For a through hole. For a blind hole. r m ...
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· BALL MILL Principle: The ball mill works on the impact between the rapidly moving ball and the powder material, both enclosed in a hollow cylinder. Thus, in the ball mill, impact or attrition or both are responsible for the size reduction. Fig: Ball mill 13 14. Working: The drug is filled into cylinder 60% of the volume. A fixed number of ball introduced and cylinder is close. .
· PRINCIPLE: A ball mill works on the principle of impact and attrition. size reduction is done by impact as the balls drop from near the top of the shell. 7. CONSTRUCTION: Wet or dry ball mill grinding machine consists of following parts: 1. Feeding part 2. Discharging part 3. Turning and driving part( gear, motor etc) 4. Rotating balls 8.
· Ball Mill Power Calculation Example #1. A wet grinding ball mill in closed circuit is to be fed 100 TPH of a material with a work index of 15 and a size distribution of 80% passing ¼ inch (6350 microns). The required product size distribution is to be 80% passing 100 mesh (149 microns). In order to determine the power requirement, the steps are as follows: Example .
Ball Screw (from μ=, η= ) Frictional resistance on the guide surface Driving torque Fa=×500×= Fa: Frictional resistance T: Driving torque m: Mass Feed screw Guide surface (Rolling friction coefficient μ= ) (Ball screw efficiency η= 96％) （） （500kg） （24N・mm） T = × 10 2π× = 24 N•mm Fa: Frictional resistance T: Driving torque Feed ...