Drilling machine is one of the most important machine tools in a workshop. The basic parts of a drilling machine are a base, column, drill head and spindle. Explain operation, speeds and feeds of drilling machines. 5. Describe care and Check the drill tang for burrs and file it if necessary. • Sleeves get nicked when. Drilling machine. A Drilling machine at a construction site with a concrete pump and a barely visible concrete mixer. The tops of foundation columns with.
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1. UNIT 4: Drilling machines: Classification, constructional features, drilling & related operations, types of drill & drill bit nomenclature, drill materials. 6 Hrs. out by a rotating cutting tool to make circular holes in solid materials. Tool which makes hole is called as drill bit or twist drill. PURPOSE. This chapter contains basic information pertaining to drilling machines. A drilling machine comes in many shapes and sizes, from small hand- held.
The report furnishes a cost estimation of all the components of the equipment by careful considerations of all factors such as cost of material, labour, machining and downloadd components. The very essence of our economic life and growth is dependent in a great part upon the continued improvement of Electronic and Mechanical fields. To aid these fields, we have designed Which can be widely used to drill products like printed Circuit Boards, Engine heads and other Automobile components. Extreme care should be there to drill multi holes at different layouts. Drill press or drilling machine Machine tool for producing holes in hard substances. The drill is held in a rotating spindle and is fed into the workpiece, which is usually clamped in a vise supported on a table. The drill may be gripped in a chuck with three jaws that move radially in unison, or it may have a tapered shank that fits into a tapered hole in the spindle.
What is meant by reaming? What is boring?
Which tool is commonly used for drilling? What is meant by hand feed? Explain with neat sketch the salient features of radial drilling machine?
Draw and explain the working principle of upright drilling machine? With neat sketch describe the nomenclature of twist drill? Name the different types of drilling machine? A Multi spindle drilling machine has a number of drill spindles driven by a single motor. What is the difference between reaming and boring? What is meant by drilling?
All the spindles holding the drills are fed in to the work piece at the same time. What is the purpose of tapping operation? Name some work holding devices?
Part — B 1. What are the different ways to mount the drilling tool? What is counter boring? For this purpose. What is meant by power feed? What is countersinking? Review Questions: Part — A 1.
Name the different types of drilling operations? Multi spindle drilling machines are employed for work of a light character.
What are the salient features of radial drilling machine? Drill bits can be fed by lowering the Drill head. The work pieces drilled in this machine are as follows: The Main eccentric is driven by the drilling machine spindle which is driven by a single motor. This machine is used in mass production.
It is designed to drill five holes of various diameters in unsymmetrical layouts. Eccentric is a mechanism which is usually used to convert rotary motion into sliding motion. Here we are converting the rotary motion into revolutionary motion and in to rotary motion. It shall be noted that an Eccentric cannot convert reciprocating motion into rotary motion. Through the Main Eccentric and the revolutionary motion of the Revolving plate is converted into rotary motion of the Drill holding Eccentrics.
The several drill holding eccentrics are driven by the main Eccentric through a Revolving plate. The pillars provided with springs guide the Driller head in motion. Springs secure the Drill head with drill bits. Reaming and Tapping. Flag for inappropriate content.
Related titles. Design and Fabrication of Elliptical Slotted Mechanism.
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Vani Devi. Rony Yuda. David Victores. Crisan; J. The drill head is positioned using motorized drives and it transverse the swinging arm. The machine spindle is moved to the location required. Multi-spindle: There are many spindles mounted on one head to allow many holes to be drilled simultaneously.
Numerical Control Drilling Machine: The machine can automatically change tooling with a turret or automatic tool changer. Speeds, fee, and table position are controlled using a computer program. Drilling Machine: Twist drill nomenclature: It is designed with cones like internal structure, narrow at the top or the web with a gradually increasing thickness to the shank.
Body Diameter clearance: That portion of the land that has been cut away so it will not rub against the wall of the hole. Chisel Edge: The edge at the end of the web that connects the cutting lips.
Chisel Edge Angle: The angle included between the chisel angle and the cutting lips as viewed from the end of the drill.
Clearance Diameter: The diameter over the cutaway portion of the drill lands.
Drill Diameter: The diameter over the margins of the drill measured at the point. The column may be of round or box section. The table, either rectangular or round. The surface of the table is degree to the column and it can be raised, lowered and swiveled around it. Slots are provided in most tables to allow the jigs, fixtures or large workpieces to be securely fixed directly to the table. Drilling Head: The drilling head, mounted close to the top of the column, houses the driving arrangement and variable speed pulleys.
These units transmit rotary motion at different speeds to the drill spindle. The hand feed lever is used to control the vertical movement of the spindle sleeve and the cutting tool.
Is it based in electromagnets? Dear sir , what is purpose , features, function of home made micro drillingmachine? And which type of people can use this? Click here to cancel reply.
Tnkz n kip it up. Came here by searching for playing slots. Thks very much It was a much help. Tajamul December 21, It is a good study material for students.