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Engineering Projects

The Jig Saw Machine


Published on Jan 30, 2017

Abstract

As we have selected “The Jig Saw Machine” as a project work, it has helped us to understand the wood cut working, by all of the view like about its working capacity, the product which will it produce, what will be the difficulties in working of the machine, kind of safe working, working reliability, number of operations that can be performed with this machine etc. A Jig saw is a one type of a saw, which cut the wood in different shape. It cut different shape with finishing. It works on stock of blade. The blade is cut profile cutting, curves circle and other complicated part. It works on slides .the mechanism is crank rod link mechanism.

This mechanism gives up & down motion to blade. We use pulley in proper ratio to control rpm of motor. And finally this machine is cut wood precisely with finishing. As the work-shop is having mechanical work press, it is also feasible to make the parts as dimension & working point of view. So it may prove an additional advantage of having such kind of machine. The other objective of making a project that number of students can understand working of “Jig saw machine”.

Introduction

The jig saw machine is a mostly use for wood cutting. Various types of operations on wood by this machine. Like straight cutting, profile cutting, curves, circular holes and decorative cuttings are obtained by this machine.

History:- In 1946 Albert Kaufmann, an engineer of Scintilla AG company in Solothurn, Switzerland, replaced the needle on his wife’s sewing machine with a saw blade. In 1947, after development of Kaufmann’s invention, Scintilla started producing jig saw under name “Lesto jigsaw”. In 1954Scintilla was acquired by Bosch and in 1964 the name “Lesto” was replaced with Bosch. After some time many company was made this machine.

Jig saw work on a tool’s up & down motion and our design is innovative so we can cut the material very precisely and give any shape on job. For cut various type material we can use various types of blade.

 Jig Saw Machine

A wide variety of blade types are used, including;

(1) Various numbers of TPI (Teeth per Inch).

(2) Blade edge for cutting soft materials.

(3) Cranked blades to overcome the setback of the blade and allow flush cutting.

(4) Thin blades to allow tighter curves to be cut. (5) Push stroke cutting blades to avoid damage to the top surface.

In this machine, cutting is totally depended on tool’s (Blade) stroke length, and the stroke length is depends on crank shaft mechanism. And also we consider RPM of motor for stroke per second and consider pulley’s diameter for maintain ratio of RPM.

The machine is usually made of many materials like cast iron, M.S and other hard materials. Because to reduce vibrations and other unnecessary forces.

The cost is determined by the amount of features, which determine what tooling will need to be used. It is advised to keep the features as simple as possible to keep the cost of tooling to a minimum. Features that are close together produce a problem because it may not provide enough clearance for the slide mechanism, which could result in another station. It can also be problematic to have narrow cuts and protrusions

Profile cutting

it the mechanical saw with a fine steel blade for cutting intricate curves in sheets of material. Jigsaw an electronic machine saw with narrow vertically mounted blade for cutting curves, complex pattern etc.)

 A system and method of cutting a profile along a linear edge of a wooden work-piece utilization two space-a part rotating cutting tools whose cutting edges mirror one another and which are mounted for rotation about parallel axes.

 This invention related generally to the removal of material from a work-piece possessing grains or other pattern of fibrous tissue such as a wooden work-piece and related more particularly to means and method for cutting a profile, or crop, along the edge of such a work-piece.

Jig Saw Machine

 Another object of the present invention is to provide such a system and method which upon completion of a profile cutting operation, yields a work-piece which will not likely be damaged by the cutting tool being used to cut the work-piece.

STATE CUTTING

• The state cutting is the operation of the jig saw machine.

• In state cutting we cut the material in state form.

• We can obtain finish cut with proper finishing material edges.

• State cutting is the fast process compare to other process.

• When we cut state cutting we have to use a state guide plate.

CURVE AND ANGULAR CUTTING

• The curve cutting is the one type of operation of jig saw machine.

• It cut the material in curve form.

• We can also cut the material in angular form.

• Angular plates also can be cut by this machine.

• We can cut the material with precisely.

ASSEMBLY:

 Jig Saw Machine

Advantages

 Cutting rate is high.

 Tool cost is very low.

 Maintenance is less.

 Awkward shape can easily obtain.

 No other finishing process require.

Disadvantages

 Power consumption rate is high.

 Friction is high in block and slide.

 Sometime tool may break due to loosening of blade and misalignment.

 Above 15 mm thickness material cannot be cut

CONCLUSION

In this semester our group member together as a teamwork prepared various design aspect of jig saw machine and determined the manufacturing aspects of the same.

We have completed working drawings of all the necessary parts with details and assembly drawings with necessary dimensions using AutoCAD and CREO.

We have estimated the probable total cost of manufacturing of a jig saw machine including necessary assumptions of market price.

Finally, we are ready to manufacture all the necessary parts in the forthcoming semester and continue to complete assembly of all parts and final testing in the workshop.

Project Done by

PRAJAPATI ANKIT .M, PRAJAPATI POORVANG .J, PARMAR DARSHAK .A, DARJI SANI .R, PRAJAPATI RAVI .C

References

[1] Ikechukwu Celestine Ugwuoke, Olawale James Okegbile, Ibukun Blessing Ikechukwu, ” Design and Fabrication of Groundnut Shelling and Separating Machine”, International Journal of Engineering Science Invention, Volume 3, Issue 4, April 2014.

[2] Ikechukwu Celestine Ugwuoke, Olawale James Okegbile, Ibukun Blessing Ikechukwu,Robert Temitope John,” Design and Development of Manually Operated Roasted Groundnut Seeds Peeling Machine”, International Journal of Recent Development in Engineering and Technology, Volume 2, Issue 4, April 2014.

[3] Oladeji Akanni Ogunwole, “Design, Fabrication and Testing of A (Manually and ElectricallyOperated) Roasted Groundnut Decorticating Machine”, Food Science and Quality Managemen, Volume 14, 2013.

[4] Adetoro K. A,” Development of a yam peeling machine”, Global Advanced Research Journal of Engineering, Technology and Innovation ,Volume 1, July, 2012.







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