civilwartestseries

SYLLABUS Study of parts, working, different operation and of lathes - milling machine - shaping machine - slotting machine - planning machine - various attachments - quick return mechanisms 1. LATH MACHINE 2. SHAPER MACHINE 3. PLANNING MACHINE 4. MILLING MACHINE 5. DRILLING MACHINE 6. SLOTTING MACHINE DOWNLOAD PDF NOTES

The slotting machine is a reciprocating machine tool in which, the ram holding the tool reciprocates in a vertical axis and the cutting action of the tool is only during the downward stroke Construction: The slotter can be considered as a vertical shaper and its main parts are:  1. Base, column and table  2. Ram and tool head assembly  3. Saddle and cross slide  4. Ram drive mechanism and feed mechanism - The base of the slotting machine is rigidly built to take up all the cutting forces.  - The front face of the vertical column has guide ways for Tool the reciprocating ram.  - The ram supports the tool head to which the tool is attached.  - The workpiece is mounted on the table which can be given longitudinal, cross and rotary feed motion.  - The slotting machine is used for cutting grooves, keys and slotes of various shapes making regular and irregular surfaces both internal and external cutting internal and external gears and profiles  - T...

The drilling machine or drill press is one of the most common and useful machine employed in industry for producing forming and finishing holes in a workpiece.  The unit essentially consists of:  1. A spindle which turns the tool (called drill) which can be advanced in the workpiece either automatically or by hand.  2. A work table which holds the workpiece rigidly in position. Working principle: The rotating edge of the drill exerts a large force on the workpiece and the hole is generated. The removal of metal in a drilling operation is by shearing and extrusion. Types of Drilling Machines:  A wide variety of drilling machines are available ranging from the simple portable to highly complex automatic and numerically controlled machines are as follows:  1. Portable drilling machine:  - It is a small light weight, compact and self contained unit that can drill holes upto 12.5 rnrn diameter.  - The machine is driven by a small electric motor operating ...

- Milling is the cutting operation that removes metal by feeding the work against a rotating, cutter having single or multiple cutting edges.  - Flat or curved surfaces of many shapes can be machined by milling with good finish and accuracy.  - A milling machine may also be used for drilling, slotting, making a circular profile and gear cutting by having suitable attachments. Working Principle: The workpiece is holding on the worktable of the machine. The table movement controls the feed of workpiece against the rotating cutter. The cutter is mounted on a spindle or arbor and revolves at high speed. Except for rotation the cutter has no other motion. As the workpiece advances, the cutter teeth remove the metal from the surface of workpiece and the desired shape is produced. Horizontal Milling Machine Construction: The main part of machine is base, Column, Knee, Saddle, Table, Overarm, Arbor Support and Elevating Screw. 1. Base: It gives support and rigidity to the machine and...

The planer is a machine tool designed to produce plane and flat surface on a workpiece which is too large or too heavy. The workpiece is securely fixed on a table called platen, and it reciprocates horizontally against a single edged cutting tool. The surface machined may be horizontal, vertical or at an angle. The planer are available in different types for doing different types and sizes of job; the most common being the standard and double housing planer. The size of the planer is specified by the maximum length of the stroke, and also by the size of the largest rectangular solid that can be machined on it. Operations of planer machine:  1. Planing flat horizontal, vertical and curved surfaces.  2. Planing at an angle and machining dovetails.  3. Planing slots and grooves. Construction: The main parts of the double Housing Planer machine is Bed and table, Housings, Cross rail, , Tool heads, Driving and feed mechanism. Bed and table:  - The bed is a long heavy...

The shaper is a machine tool used primarily for:  1. Producing a flat or plane surface which may be in a horizontal, a vertical or an angular plane.  2. Making slots, grooves and keyways  3. Producing contour of concave/convex or a combination of these Working Principle: The job is rigidly fixed on the machine table. The single point cutting tool held properly in the tool post is mounted on a reciprocating ram. The reciprocating motion of the ram is obtained by a quick return motion mechanism. As the ram reciprocates, the tool cuts the material during its forward stroke. During return, there is no cutting action and this stroke is called the idle stroke. The forward and return strokes constitute one operating cycle of the shaper.  Construction: The main parts of the Shaper machine is Base, Body (Pillar, Frame, Column), Cross rail, Ram and tool head (Tool Post, Tool Slide, Clamper Box Block). Base:  - The base is a heavy cast iron casting which is fixed to the sh...

MACHINE TOOLS: - Machining equipment that cuts, shears, punches, presses, drills, grinds. - The removed part of materials from the work piece is called as chips - Machine tools are generally the power driven metal cutting or metal farming machines used to alter/change the workpiece to the required shape and size by: 1. Cutting away the unwanted sections 2. Pressing, drawing, punching or shearing 3. Controlled electrical machinery process LATH MACHINE PARTS OF LATH MACHINE 1. BED : - The bed is a heavy, rugged casting in which are mounted the working parts of the lathe. - It carries the headstock and tail stock for supporting the workpiece - provides a base for the movement of carriage assembly which carries the tool. - Bed is a massive single casted component  2. HEAD STOCK - The headstock is permanently clamped on the left hand side of the bed - it serves as housing for the driving pulleys, back gears, headstock spindle, live centre and the feed reverse gear. - The headstock spind...