The Design And Fabrication Of A Grain Grinding Machine
The Design And Fabrication Of A Grain Grinding Machine
Abstract
A grinding machine, often shortened to grinder, is any of various power tools or machine tools used for grinding, which is a type of machining using an abrasive wheel as the cutting tool. Each grain of abrasive on the wheel’s surface cuts a small chip from the workpiece via shear deformation.
Grinding machine consists of a bed with a fixture to guide and hold the work piece, and a power-driven grinding wheel spinning at the required speed. The speed is determined by the wheel’s diameter and manufacturer’s rating. The grinding head can travel across a fixed work piece, or the work piece can be moved while the grind head stays in a fixed position.
Fine control of the grinding head or table position is possible using a vernier calibrated hand wheel, or using the features of numerical controls.
Grinding machines remove material from the work piece by abrasion, which can generate substantial amounts of heat. To cool the work piece so that it does not overheat and go outside its tolerance, grinding machines incorporate a coolant. The coolant also benefits the machinist as the heat generated may cause burns. In high-precision grinding machines (most cylindrical and surface grinders), the final grinding stages are usually set up so that they remove about 200 nm (less than 1/10000 in) per pass – this generates so little heat that even with no coolant, the temperature rise is negligible.
List Of Illustration
- Introduction
- Literature Review
- Material selection
- the grinding limit
- The construction and Design methods
List of Symbols
- N – Factor of safety Kilogram
- M –Mass Kilogram
- Dia – Diameter Meters.
- M – Bending Moment Meters
- T – Torque Newton meter
- V – Velocity Newton – second
- T – Time Seconds
- I – Moment of inertial Kilogram (meter)
- g. – Acceleration due to grarity Newton (meter)
- G – Modulus of rigidity Newton (meter)
- P – Pressine Newton (meter)
- p. – Power Kilowatts
- F – Force Newton’s
- H – Height Meter
- Rpm – Revolution per minute
- R – Radius Meter
- V – Volume Meter
- Wt – Weight Newton’s
- D – Density Kilogram – mater
- Pc – Critical Load Newton
- L – Length Meter
- W – Width Meter
- S – bending stress Newton
- Y – Tensional strell Newton /meter
Table of Content
- Title page
- Release page
- Letter of transmittal
- Signature page
- Approval page
- Dedication
- Acknowledgement
- Abstract
- List of illustration
- List of symbol
- Table of contents
Chapter One
- Introduction
- Purpose of construction
- Importance and specification of the project
Chapter Two
- Literature Review
- Handgrinding method
- Direct linkages and its limitation
- Refined Design and its specification
Chapter Three
- Material Selection
- Material selection and Design of shaft
- Selection and location of Bearing
- Electric Motor Selection
- Selection Of Pulley Material
Chapter Four
- The grinding Unit
- The frame
- The spinning shaft
- Belt Drive
Chapter Five
- Construction and Design Method
- Metal Hopper
- The grinding Unit
- Outlet
- Barrel
- Perforated metal
- Sequence of Assembly
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