Feed mechanism report

NITTE MEENAKSHI INSTITUTE OF TECHNOLOGY

(An Autonomous Institution Affiliated to VTU, Belgaum; accredited by NBA (AICTE), New Delhi)

YELAHANKA, BANGALORE – 560064

A Micro project Report On

FEED MECHANISM IN MACHINES

Submitted in partial fulfilment of award for CIE marks of Bachelor of Engineering in MECHANICAL ENGINEERING

Submitted by:

ADITH SAGAR NARAYAN (1NT13ME006)

ARCHITH V (1NT13ME021)

ASHIK R (1NT13ME023)

GOUTHAM N (1NT13MEO53)

JAIKUMAR V.T (1NT13ME062)

Under The Guidance of

Mr. Shivpratap Singh Yadav

Asst Prof, Dept of Mechanical Engineering,

NMIT, Bangalore-64

Department Of Mechanical Engineering

NITTE MEENAKSHI INSTITUTE OF TECHNOLOGY

YELAHANKA, BANGALORE-64

2015-2016

FEED MECHANISM IN MACHINES 2015-2016

ACKNOWLEDGEMENT

This report is the product of discussions, sharing comments and rewriting that relied upon the skills and commitment by Adith Sagar Narayan, Archith V, Ashik R, Goutham N and Jaikumar V.T. There was much that we learned from each other through this project. All the members of the team received support and encouragement from their respective friends and we would like to take this opportunity to thank them.

The success of this effort depends on the lecturers who encouraged students to reflect on their own learning and to pursue imaginative activities and questions.

We wish to thank our college Nitte Meenakshi Institute of Technology, Bangalore, our principal Dr. H C Nagaraj, Head of Mechanical department Dr.Kiran Aithal, our guide Asst. Professor Shivpratap Singh Yadav and to all my friends who helped me in completion of this micro-project.

BE, Mechanical Engineering, NMIT, Bangalore-64


ABSTRACT

Lathe is considered as one of the oldest machine tools and is widely used in industries. It is called as mother of machine tools. It is said that the first screw cutting lathe was developed by an Englishman named Henry Maudslay in the year 1797. Modern high speed, heavy duty lathes are developed based on this machine.

Feed mechanism is one of the major tasks in all the machine operations. The Bar feeding mechanism is a metal cutting machine tool designed to feed the metal.

As in case of lathe, feed mechanism is of much importance in all the other machines like Sewing machine, Crushers, Grinders, Shaping and Milling machines. The machines are exclusively intended for mass production and they represent fasten and more efficient way to feed the materials.

There are several mechanisms to make the carriage and cross slide move automatically and to change the direction of their movement. There are numerous machines around us where the feed mechanism is implemented successfully by the help of recent development in mechanical like gears, cams etc-, electronics development as in case of sensors, programming etc-.

In this micro-project we are interested in making a small working model in order to show how the feed mechanism exactly works as in case of machines.



CONTENTS

Introduction. Components. Construction. Working. Types of feed mechanism.

Forward Feeding. Reverse Feeding. Drop Feeding.

Advantages. Limitations. Applications. Conclusion. Budget. Bibliography.

INTRODUCTION



Feed mechanism is the process in machine involving the feeding of the materials or the specimen or the work piece at the required rate in to the working action so that the desired product is obtained. “As in case of healthy development of a child a proper nutrition or the feed is necessary, so also in case of machines a proper FEED MECHANISM is very much necessary”.

Feed mechanism is involved in various machining processes like lathe, crushers, millers, shaping machine, grinding machine, sewing machine etc-. Feed mechanism should be perfect in order to get the desired product. As in case of crushers and grinders the material flow should be at a proper rate. If the materials rate is more desired product would be less efficient, more feed rate may destroy the tools used for crushing and grinding operations.

Feed mechanism in case of lathe is given by the movement of carriage and cross-slide in both the directions. It involves gears and rods in order to give the feed. In sewing machine the material is fed with the help of small rollers.

Figure No.1: Feed mechanism in Grinders. Figure No. 2: Feed mechanism in Crushers.

Figure No. 3: Feed mechanism in sewing Figure No. 4: Feed mechanism in Lathe.

machine.

COMPONENTS



Base. Plastic plates. Motor (2000 to 3000rpm). Links. Battery (9V). Battery cap and connection wires. Nuts, Bolts and other fixing agents.

Figure No. 5: Base Plate. Figure No. 6: Plastic Plates.

Figure No. 7: Dc motor. Figure No. 8: Links. Figure No. 9: Battery- 9V.

Figure No. 10: Battery caps. Figure No. 11: Connecting Figure No.12: Nuts

wires. and Bolts.

CONSTRUCTION



Material used: Plastic.

Thickness of the material: 0.2 cm.

There are 7 Links in this construction.

Table No. 1: Dimensions of Links.

Links Length (cm) Breadth (cm)Link-1 (Fixed) 24 3

Link-2 22 2.2Link-3 13.6 1.7

Link-4 (Motor) 18 2Link-5 13 3Link-6 14.8 2

Link-7 (fixed) 21 Top= 3, bottom= 5.5

The 7 links are cut to the exact dimensions. Link-1 is fixed on to the corner of the base plate. Base plate is usually

made up of plastic or wood. The Links 1 and 7 are fixed with nut and bolt on to the base plate. Then Link-2 is fixed with Link-1 with suitably nut and bolt. Link-3 is fixed with bottom of the Link-2. Then Link-3 is fixed with Link-4 with suitable link made of steel. Link-4 and Link-3 are jointly connected to the DC motor

(2000 to 3000 rpm). Link-4 is in turn connected to Link-5. Link-5 is connected to Link-6. Link-6 is attached with a sharp cutter. The Links 1 and 7 should be in the same line. Suitable triangular shaped Piece of plastic is place to the Link-3 in order

to move the work piece. Also the Link provided at the joint of Link 4 and 3 will help in moving

the work piece.



Figure No. 13: Catia Design of the model. (All dimensions are in mm)

The DC motor is having an rpm of around 2000-3000rpm. RPM will not be constant throughout the working because voltage input to the motor will be varying.

The DC motor is in turn connected to the two 9V battery with the help of battery cap and connecting wires.



WORKING

The link 3 and 4 are connected to motor. When the motor starts to rotate, then the Links 3 and 4 will start to rotate in clock-wise direction.

The Link-3 will make Link-2 to rotate which helps in initial intake of the work-piece.

The link provided at the joint of the Links 3 and 4 will help in further moving the work-piece to the next link.

The link-4 will help Link-5 to rotate which in turn result in rotation of Link-6.

The Link-6 is having only upward and downward movement. The sharp pointer at the Link-6 will help in punching the work-piece. Then the work piece is inserted flatly in to the bottom of the 1st link, then

the motor is switched on which results in rotation of the links and the work piece is send to the other end successfully.

Figure No.14: Front view of the model.

Figure No.15: Top view of the model.

TYPES OF FEED MECHANISM



Forward Feeding. Reverse Feeding. Drop Feeding. Clamp Feeding. Puller Feed Mechanism

Forward feeding, sometimes written feed forward, is a term describing an element or pathway within a control system which passes a controlling signal from a source in its external environment, often a command signal from an external operator, to a load elsewhere in its external environment

Reverse feeding occurs when electric power is being induced into the local power grid. Power flows in the opposite direction from its usual flow.

Drop feeding is a mechanism for feeding the workpiecethrough a sewing machine as it is being stitched. It is most useful for sewing heavy materials where needle feed is mechanically inadequate.

A hose clamp or hose clip is a device used to attach and seal a hose onto a fitting such as a barb or nipple.

ADVANTAGES



Simple in construction than mechanical hacksaw. It is a compact one. Less maintenance. Fast production.

LIMITATIONS

Additional cost is required to do the automation. Metal cutting industries and workshops.

APPLICATIONS

Small and medium scale industries application. Metal cutting industries and workshops. Used in stone and coal crushers, Lathe, shaping, milling, grinding

machines Its main application is in the field of sewing machine. Feed mechanism is also used in Printers in order to take the paper in.

Figure No.16: Drilling and Lathe machine.

CONCLUSION



Feed mechanism helps in analyzing the detail study on the links and its movement. It further helps us in achieving a good theoretical as well as a practical design. It also helps us in analyzing the strength and the material properties of the links which we have used in this project.

“Feed mechanism in machines” project helps us a lot in the aspect of design, knowing more about relative velocities and acceleration of various links involved and also about the material properties with which we have worked out. So we are very much eager to upgrade this project in to fully “automatic feed mechanism” by using program and sensors in future days.

BUDGET



Sl. No. Components Quantity Price (in Rs) Amount(in Rs)1 Material 1 50 502 Cutting - 50 503 Fixing agents - 60 604 Battery and

connecting wires3 40 120

5 DC Motor 1 600 600Total 880



BIBLIOGRAPHY

Automatic bar feed cutting machine.pdf.

Joseph flather, “Feed mechanism for lathe”, letters patent No.317,449, May 5 1885.

Anderson, J. R., Corbett, A., Koedinger, K., & Pelletier R, (1995). Cognitive Tutors: Lessons Learned. Journal ofthe Learning Sciences , 4 (2), 167-207.

Catrambone, R. (1998). The subgoal learning model:tter examples so that students can solve novelProblems. Journal of Experimental Psychology: General,127 (4), 355-376.

Chi, M. T., Bassok, M., Lewis, M. W., Reimann, P., &Glaser, R. (1989). Self-explanations: How students studyand use examples in learning to solve problems. CognitiveScience , 13, 145 – 182.

Automatic feeding and cutting mechanism video at you tube.

Automated feeding cutting mechanism model mini project at you tube.


Feed mechanism report

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