Time and cost analysis, Mechanical Engineering

Time and Cost Analysis

This discusses about certain basic activities that must be carried out in a factory to convert raw materials into finished products. These activities broadly are Processing and assembly operations, Material handling, Inspection and testing and Coordination and control.

The machining times for various machining processes and the importance of it is explained.

The machining time in turning (t) is as

t = L + L0 /2 f N

The machining time in milling T in minutes can be calculated as

T = (L × n)/ f Z N minutes

Time for drilling the hole = L/ f N     minutes

Machining Time = Depth of hole to be bored in mm minutes/ N × feed/rev

where, N = No. of revolutions per min. of machine spindle or work.

In boring operation the machining time is calculated the same manner as in turning. It is given by the following relation :

Machining Time = Depth of hole to be bored in mm minutes/ N × feed/rev

where, N = No. of revolutions per min. of machine spindle or work. Machining time for shaping can be calculated as below.

No. of cycles required (n) = Shaping width / Feed per cycle f

= B/f

Machining time = No. of cycles × time required for each cycle

1428_Time and Cost Analysis.png

The machining time (T) in cylindrical grinding can be calculated from the following relationship.

T = (L . P . K )/ ( f . N . t) min .

The total production cost of machined components is made up of the following components : material cost, labour cost, overhead cost, tool cost and cost of percent of the total cost. But the influence of tools on the other costs is considerable. It is often possible that the tool cost is increased but the total production cost is reduced considerably because of the influence of the tool on other aspects of cost.

The costs that go into machining a part can be broken into three categories as Material removal cost, Tool cost and Non-productive cost

Total machining cost = Material removal cost + Tool cost + Non-productive cost. The tool cost is made up of

(a) Tool change cost (TCC) or cost for indexing the insert

(b) Tool regrinding cost (TRC)         

(c)  Tool original cost (TOC)

(d) Tool inventory cost (TIC)

Total tool cost = TCC + TRC + TOC + TIC

Posted Date: 12/26/2012 1:18:57 AM | Location : United States







Related Discussions:- Time and cost analysis, Assignment Help, Ask Question on Time and cost analysis, Get Answer, Expert's Help, Time and cost analysis Discussions

Write discussion on Time and cost analysis
Your posts are moderated
Related Questions

Application of Hydrostatic sensor paver machine The Hydrostatic sensor paver machine that is used for lying bituminous Mixed material, roll-down or lean-mixed concrete, track-

write the conservation of mass for steady flow throught a streamtube with asingal one dimensional inlet 1and exit 2

Cell Covers: Each cell is covered from the top of the cell covers and the terminals projected from the cell covers. The terminals are arranged alternatively in a line.

Question 1: A good display of the merchandise is the result of planning, cooperation and coordinating. A good schedule of work is important for a good design with the use of me

Scope of WPS and PQR A Welding Procedure Specification (WPS) is written qualified welding procedure prepared to provide direction for making production welds to code requiremen

What are the two ways of pile foundation Pile foundations can be installed in two ways. Timber, steel and precast concrete piles, are driven from the ground using hammers till

Determine the distance of application of the load: A rigid bar of negligible weight transmits a load W to a combination of 3 springs as illustrated in Figure. The three spring

Explain the Importance of Value engineering Improve your career skills Separate "Symptoms" from "problems" Solve "root cause" problems and capture opportunities

(a) Oil, with density ρ= 900 kg/m 3 , and kinematic viscosity υ=0.00001m 2 /s, flows at the rate of 0.2m 3 /s through 500m of a cast iron pipe of diameter d=200mm. Using this infor