Final year project has been specialized for Special purpose machine.

1. DESIGN OF AUTOMATIC
SCREWING MACHINE
NAME OF THE COMPANY : ELMECH AUTOMATIONS,COIMBATORE
INTERNAL GUIDE: DR.C.MUTHUSAMY (ASSOCIATE PROFESSOR)
EXTERNALGUIDE: MR.DHIVYAN (DESIGN ENGINEER)
TEAM MEMBERS:
M.GOWTHAM(2013107310)
V.GOWTHAM(2013107311)
S.SARAVANA KUMAR(2013107330)
M.MADHAN SONAI(2013107099)

2. OBJECTIVE
• The main objective of the work is to minimize the machining
and work loading time of screwing and terminal handling.
• Automatic screwing machine special purpose machine (SPM)
which screws the screw in the brass terminal. The component to
be screwed is placed on the fixture is automatically.
• The ultimate goal is to speed up the process there by increasing
productivity through a proper utilization of man and machine.
• The indexing system is added for reduction of the cycle time.
• Stepper motor is installed for rotating the indexing system.

3. EXISTING SYSTEM OF SCRWEING
MACHINE

4. PROBLEM IDENTIFICATION
• The problem is obtained from the screwing operation. The
component to be screwed is placed manually on the component
fixture.
• The switch to start the screwing is turned on now the screw
operates on the component to the terminal
• Safety is too low which leads to accident if the operator
accidently brings his hand inside the working area during
operation.
• loading and unloading setup for screwing component is done
by manually

5. MODIFICATION DESIGN OF SCREWING
MACHINE

6. DESIGNAND CALCULATION
• PART DESIGN • CALCULATION
Step angle is calculated using the formula
∅ = 3600/m-𝑁𝑟
Where,
∅ = Step angle in degrees
m = Number of phase
𝑁𝑟 = Number of rotor teeth
Here we need 24 steps/revolution
So,
m = 3 phase
𝑁𝑟= 21
Substitute values in above formula we
got, step angle is 150
and 24 steps per
revolution

7. COMPONENTS DESCRIPTION
• Bowl feeder is used to feed individual component parts for
assembly on industrial production line.
• Linear feeder conveys the components over short or relatively
long distance and also buffer storage.
• Indexing system used for “positioning a work piece at the
precise angle for a screwing operation.
• Stepper motor is a electric motor that divides a full rotation into
number of equal steps.
• Pneumatic screw driver is fixed in the holder.
• Air pipe is used to supply the air to the pneumatic screw driver.

8. IMPROVEMENTSACHIEVED
• Three stations added for indexing system
• Reduces time consumption.
• Screwing is more accurate than the manual.
• Indexing system is added for reduction of the cycle time.
• Process is to be automatized
• No need of skillful labour.
• To enhance safety, sensor is used which stop the machine to
avoid accident.

9. RESULT OF THIS PROJECT
• Alteration design of automatic loading of terminal will over
come the difficulties of current screwing machine.
• This concept saves a time and may leads to efficient working.
• Normally the manual loading operation take 20 seconds for one
component. But automatic process can take only 8 seconds.
• So the machine reduces the 12 seconds for automatic screwing
process.
• The productivity of screwing component increased above 300
per hour.

10. CONCLUSION
• Thus the automatic screwing machine is designed for this
project work. when the indexing system plays a major role in
the machine when using indexing system with separate station.
• The supply of pneumatic system to achieve the automatic action
by the cylinder motion, where the FRL unit is placed to
maintain the pressure as 4 bar.
• This work develops the automation and reduces the human
stress.
• The Computer system is provided to control the multiple
program can be saved in the software on the data's can be
collected in the system.