UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Hacksaw: Bent and Flattened Frame, Bi-Metal Blade
A hacksaw is a C-shaped frame holding a narrow blade under tension from a screw. In a 1936 patented frame, each upright is made from a piece of wire rod, bent to shape and then pressed, rolled or hammered flat, with its end flattened at right angles to carry the blade, and the uprights are held in a channel-section top member. Bi-metal blades, patented in 1976, start as a metal block with a central strip of cutting tool steel; it is rolled flat into a sheet, the sheet is divided into two blades whose edges are the tool steel, the teeth are cut in that edge, and the blades are hardened by heating, quenching and tempering. The teeth are given a wavy set.
Hejuru
Factory process
Amabwiriza
1
1
Bend and flatten the uprights
Bend and flatten the uprights
Bend a piece of wire rod to the upright's shape, then press, roll or hammer its horizontal part and most of its upright part flat; flatten the end at right angles to take the blade.
Ibikoresho by'iyi ntambwe:
Umuzingo w'inkoni z'insinga z'icyuma1 as requiredIbikoresho bikenewe:
Inyundo igwa ifite ibibumbiro byo gucura2
2
Assemble the frame
Assemble the frame
Fit the uprights into the channel-section top member and fit the tensioning screw.
Ibikoresho by'iyi ntambwe:
Umugozi mugari w'icyuma ufite ishusho ya U1 igice
Vise ikurura ifite inoti y'amababa1 igice3
3
Make the blade stock
Make the blade stock
Roll a block with a central strip of tool steel flat into a sheet, and divide it into two blades with the tool steel along one edge.
Ibikoresho by'iyi ntambwe:
Inkoni y'uruziga y'icyuma cyihuta (HSS)1 as required
Umugozi mugari w'icyuma cya karubone1 as requiredIbikoresho bikenewe:
Imashini isingiya icyuma4
4
Cut and harden the teeth
Cut and harden the teeth
Cut the teeth in the tool-steel edge, set them in a wave, and harden the blades by heating, quenching and tempering.
Ibikoresho bikenewe:
Imashini ikata amenyo y'igisatuzo
Itanura ryo gukomeza no gusubiza umugozi mugariIbikoresho
5- 1 as requiredUmwanya
- Umwanya
- Umwanya
- 1 as requiredUmwanya
- 1 as requiredUmwanya
Ibikoresho bikenewe
4- Umwanya
Iki gishushanyo gikora
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