Workshop Report practice 1

8/12/2019 Workshop Report practice 1

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TITLE: MACHINING A TAPERED SHAFT.

INTRODUCTION

Topic: Lathe Machine

Figure1: Lathe Machine

Lathe machine is a machine which rotates the work piece on its axis to performvarious operation such as cutting, knurling, drilling, or deformation. The tools areapplied to the work piece to create an object which has symmetry about an axis ofrotation. The picture as show in figure 1.



The explain about lathe machine how to use with workpiece and keepsafety:-

Machine tool which spins a block of material to perform variousoperations such as cutting, sanding , knurling, drilling ordeformation with tools that are applied to the work piece to createan object which has symmetry about an axis or rotation.

Carriage is assembly that moves the tool post and cutting tool along the ways

Carriage Hand wheel is a wheel with a handle used to move the carriage byhand by means of a rack and ponion drive.

Apron is the front part of the carriage assembly on which carriage hand wheelis mounted.

An adjustable horizontal metal rail the tool rest between the material and the

operator accommodates the positioning of shaping tools, which are usuallyhand-held. With wood, it is common practice to press and slide sandpaperagainst the still-spinning object after shaping to smooth the surface made withthe metal shaping tools.

Metal is removed from the workpiece using a hardened cutting tool, which isusually fixed to a solid moveable mounting called the "toolpost", which is thenmoved against the workpiece using handwheels and/or computer controlledmotors.



OBJECTIVE

At the end of the session the student will be able;

i) To exposes the student to aperate the lathe maching for variousmachining processes and practice measuring skills.

ii) To exposes the students to tool bits grinding (off hand grinding).

iii) To operate the lathe maching for various machining processes:-

Facing.

Centre drilling.

Knurling.

Straight turning.

Chamfering.

Tapered turning.

iv) Students need to keep safety in the workshop.



TOOLS EQUIPMENT

1. Table Grinder.

2. Cutting Tool Holder.

3. Knurling Tool.

4. Vernier Calliper.



5. Chuck Tightened.

7. Tool Holder Tightened.

8. Driling Tool.



9. 13mm Wrench.

10. Round Bar.

11. Toolbit Set 1/4 inch Square HSS.

12. Tool Holder.



SAFETY PRECAUTIONS

1. Before starts any work in the works, permission must b e obtained fromthe Lecturer.

2. Understanding its mechanism and knowing how to stop a machinequickly by using emergency stop button.

3. Wear a safety glasses for eye protection.4. Wear a suitable clothes to avoid from injured.5. Do not wear a ring or watches.6. Make sure wear a safety shoes to protect from a small chip or sharp

chips.7. Never have more than one person operate a machine at the same time.8. Use the machine very properly and keeps hands away from moving part.9. Always stop machine before measuring, cleaning, or making adjustment.

10. Switch off mainsuis before leaving the workshop.



DISCUSSIONS

Here we discuss about lathe round bar and bar lathe ways round. To solve this

problem we need to follow the following steps. If there are problems we can discuss

the problem. For example, lathe right round bars with a diameter not be shared. We

need to set the cross slide handwheel meter diameter shared the corresponding

amount. in addition, the problem lathe tool is broken. We can use the remnants of

the lathe tool. Then we sharpened again. apart from the above discussion, we can

share to solve the problem. This is the case, we discuss the group. that is where we

can share our incomes and skill that we can do. This discussion, we hope to solve

the problem. We have to divide their work to each person. With this we can facilitate

practical work.





REFERENCES

1. http://www.americanmachinetools.com/lathe_diagram.htm . (6.10.2012)

2. http://www.technologystudent.com/equip1/mlathe1.htm . (6.10.2012)

3. http://www.slideshare.net/AZIZCO/lathe-machining-presentation . (6.10.2012)

4. http://www.lathes.co.uk/latheparts/index.html . (6.10.2012)

5. http://en.wikipedia.org/wiki/Metal_lathe . (6.10.2012)



PROCEDURE

PROCEDURES DIAGRAMSSetting up the machine :

1. Switch on the main power supply.2. Switch on the coolant of the machine.3. Make sure the coolant flow is good.4. Make sure the headstock assembly in the

good order.5. Make sure to pull up the movement knob

so the chuck is moving in perfect order.6. Check the angle of tool post and carriage

in zero degree angles. Facing for cylinder ends :

1. Set up the machine.2. The cutting tool is attached to the tool

holder.3. Set the speed up approximately 900rpm.4. The work piece is attached to the chuck.

5. Start the facing process for the first side(right side) of the cylinder.

6. Take out the work piece and measureexactly 100mm length from the end offacing area.

7. Start the facing process for the second sides(left side) of the cylinder until the workpiece are exactly 100mm.

Straight turning for 22mm diameter :1. Set up the machine and make sure in a

good condition.2. Attached the cutting tool on the tool

holder.3. Set the speed up to approximately 900rpm.4. The work piece is attached to the chuck.5. Start the straight turning process for the

first (right side) of the cylinder until thediameter reach 22mm.Open the chuck and take out the work pieceout. Fit in the work piece in to the chuck forthe second side (left side) and repeat the

straight turning (no 1 to 5) for it.



Straight turning for 15mm diameter :1. Set up the machine.2. Attach the cutting tool to the tool holder.3. Set the speed up to approximately 900rpm.4. The work piece is attached to the chuck.

5. Start the straight turning process untilthe diameter reach 15mm and length 20mmfrom the end of the facing face.

Straight turning for 10mm diameter : 1. Set up the machine.2. Attach the cutting tool to the tool holder.3. Set the speed up to approximately 900rpm.4. The work piece is attached to the chuck.

5. Start the straight turning process until

Knurling for 22mm diameter : 1. Set up the machine.2. The knurling tool is attached to the tool

holder.3. Set the speed up to approximately 60rpm.4. The work piece is attached to the chuck and

make sure that the right side (the one with10mm and 15mm diameter)is free around65mm.

5. Knurling process is started until reachlength 25mm from the knurling startingpoint.

Center drilling process : 1. Set up the machine.2. The drill tool is attached to the barrel of the

tail stock.3. Set the speed up to approximately 60rpm.4. Make sure the work piece is attached to

the chuck and make sure the right side andthe 15mm diameter are been gripped bythe chuck.

5. The center drill process is started until thewhole length of the small drill is inside thework piece.



Chamfering for 6 degree angle :1. Set up the machine.2. The cutting toll is attached to the tool

holder.3. Set the speed up to approximately

900rpm.4. The work piece is attached to the

chuck and make sure that the rightside and the 15mm diameter are beengripped by the chuck.

5. Adjust the cutting angle to 6 degree.6. The chamfering process is started until

the diameter reach 12mm.



PART DESCRIPTION

BED Base of the machine that sits on the groundor a table and supports the other

components of machine.

HEADSTOCK A ASSEMBLY The front section of the machine that isattached to the bed. This assemblycontains the motor and drive system which

powers the spindle.

TAILSTOCK A ASSEMBLY The rear section of the machine that isattached to the bed. To support the other

end of the workpiece and allow it to rotate

that driven by the spindle.

CARRIAGE Is a platform that slides alongside theworkpiece, allowing the cutting tool to cut

away material as it moves.

CROSS SLIDE Is attached to the top of the carriage andallows the tool to move towards or awayfrom the workpiece, changing the depth of

cut.

COMPOUND Is attached on the top of the cross slide and

slide supports the cutting tool.

Documents

Workshop Report practice 1