In previous article, we discussed 'Pedal Operated Dual chain Hacksaw Project' Idea where two separate chains were used to drive the Hacksaw. This might be costly or somewhat complicated. In this article we are going to discuss a Pedal operated simple hacksaw project Concept.
Introduction to Pedal Operated Simple Hacksaw machine:
Pedal Operation convert Energy Input given by Operator to Circular motion of the wheel. Pedaling also useful as an exercise. Pedal Power is converted into mechanical work. This Circular motion of the pedal crank is converted into reciprocating or sometime oscillatory motion to drive Hacksaw blade. Generally Hacksaw is operated by manually, hydraulically, electrically motor or pulley commonly used in industries and workshop. ‘To and pro' motion of the hacksaw blade should cut the required material.
|Fig. Pedal Operated Hacksaw project|
Components requirement and their Design Guideline:
1. Bicycle Model:
Proper and comfortable seating arrangement must be design so it will produce less Operator Fatigue. Seat height is selected according to Ergonomics principles and Using anthropometric data. Other Dimensions of Frame should be selected by considering same effect. Handles should be there for proper pulling force or griping purpose. Simple pipes can be welded together to form a Frame with Seating and Stand arrangement.
2. Connecting Rod:
It is a simple rod which connect the Crank i.e. pedal shaft and Hacksaw Blade. The connection mechanism shown in figure. One end of rod is connected to pedal by using any scrap round part for exa.-Bearing recess. Hacksaw blade is connected by welding to other end of rod.
|Fig. Connection mechanism for pedal and Rod|
A hacksaw is a fine-tooth saw with a blade under tension in a frame, used for cutting materials such
as metal or plastics. Hand-held hacksaws consist of a metal arch with a handle, usually a pistol grip, with pins for attaching a narrow disposable blade.A screw or other mechanism is used to put the thin blade under tension.
4. V Block
V-Blocks are precision metalworking jigs typically used to hold round metal rods or pipes for performing drilling or milling operations. They consist of a rectangular steel or cast iron block with a 90-degree channel rotated 45-degrees from the sides, forming a V-shaped channel in the top. A small groove is cut in the bottom of the "V". They often come with screw clamps to hold the work. There are also versions with internal magnets for magnetic work holding. V-blocks are usually sold in pairs.
|Fig. Job holding device- V Block|
5. Guide to Hacksaw
Hacksaw is guided by guide mechanism. One simple plate can be used to guide the Hacksaw blade.
• Power saving as it is manually operated
• Easy mechanism and simple construction
• As it is pedal operated so good for health
• Comfortable then ordinary hacksaw
• It’s totally manually operated.
• Time consuming as compared to electrical power hacksaw
• Without human effort it’s not operated.
• Not fit for heavy production.
This project can be applicable to cut small round, square Bars. Application range is depended on selection of Hacksaw blade as well as RPM required, type of material, type of jobs and total hardness of the material which is to be cut.
1) PPT Presentation : Free Download PPT Presentation of 'Fabrication Of Pedal Powered Hacksaw Machine'