How do you construct a merchant circle diagram?
How to draw Merchant’s circle diagram?
- Determine the value of thrust force F x F_{x} Fx.
- As the rake angle of the tool is known, draw the chip and tool in the orthogonal plane.
- Draw the force F z F_{z} Fz as a horizontal component and the other force F x F_{x} Fx as a vertical component.
Who invented Merchant Circle?
CEO Ben T. Smith IV
MerchantCircle was co-founded in 2004 by former CEO Ben T. Smith IV, and announced in June 2006. It was named “Newcomer of the Year” by AlwaysOn Media in 2007 and was ranked as the fifth-largest local directory site and one of the top 160 sites in the U.S. by a Quantcast study in 2009.
Which of the following is a junction is not valid for Merchant Circle diagram?
Which of the following assumption is not valid for merchant circle diagram? Explanation: Chips are assumed to be continuous in nature in drawing of merchant circle. In actual practice, thickness may not be uniform.
What is Ernst and Merchant theory?
Ernst and Merchant developed the first reasonable theory in metal cutting. This assumed that the shear angle would take up a value to make the work done in cutting a minimum. For given cutting conditions, The work done is proportional to Fc An expression has been developed for Fc in terms of the shear angle.
Which machine tool is known as the mother machine tool?
lathe
Known as the mother of all machine tools, the lathe was the first machine tool that lead to the invention of other machine tools. It is used to perform turning operations in which unwanted material is removed from a workpiece rotated against a cutting tool.
What does the merchant equation tell us?
3 replies. The Merchant equation states that the shear plane angle increases when rake angle is increased and friction angle is decreased. This equation is about shear plane angle and rake angle. It tells us that former increases when later increase.
Which of the following is not an assumption of merchants circle?
9. Which of the following assumption is not valid for the merchant circle diagram? Explanation: Sharpness of cutting edge is assumed to be constant during the cutting process. In actual machining process sharpness of cutting edge decreases as time passes.
What is the significance of shear angle *?
The shear angle is defined as the degree of angle that changes at peak frictional force and at the commencement of the experiment. where b is the uncut chip thickness, (p shear angle, w the cutting width, and the tool-chip friction angle.
What was the purpose of Merchant’s circle diagram?
2. Merchant’s Circle Diagram is constructed to ease the analysis of cutting forces acting during orthogonal (Two Dimensional) cutting of work piece. Ernst and Merchant do this scientific analysis for the first time in 1941 and gives the following relation in 1944 It is convenient to determine various force and angles. 3.
Is the Merchant’s circle diagram used for orthogonal cutting?
Other than orthogonal cutting, the merchant’s circle diagram is not used since it is based on a single shear plane principle. The friction coefficient obtained by the formula which is derived from MCD gives only the approximate value.
How to calculate the force of a merchant’s circle?
Merchant’s circle equation and derivation 1 The diameter of the circle and the resultant force is denoted by F F F. 2 The cutting force is denoted by F z F_ {z} F z . 3 The thrust force is denoted by F x F_ {x} F x .
What was Ernst and merchant’s method of cutting?
Graphical method of Cutting Force analysis in Orthogonal Cutting of Metal cutting proposed by scientists “Ernst and Merchant”