IṢẸ́ ỌNÀ
ẸWÀ ÀTI ÌLERA
IṢẸ́ ỌWỌ́
ÀṢÀ ÀTI ÌTÀN
ÌṢERÉ
ÀYÍKÁ
OÚNJẸ ÀTI OHUN MÍMU
REVERSE ENGINEERING
SÁYẸ́ǸSÌ
ERÉ ÌDÁRAYÁ
ÌMỌ̀-Ẹ̀RỌ
ÀWỌN OHUN WÍWỌ̀
Hole Saws: Toothed Strip Rolled into a Cup
A hole saw is a steel cup with teeth on its rim, driven by an arbor that carries a pilot drill at the centre. One method starts from flat strip: the teeth are stamped and then ground along one edge, the strip is bent into a tube with the teeth at one end, the seam is welded and its bead ground off, the tube is heat-treated to harden the teeth, and a cap is fitted. Better saws are bi-metal: a carbon steel cup with high-speed steel teeth welded on.
Ilọsíwájú
Factory process
Ìlànà
1
1
Stamp and grind the teeth
Stamp and grind the teeth
Cut strip to length, stamp out the teeth along one edge and grind them.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Ọ̀já irin líle oníkábọ́ọ̀nù0.2 kgÀwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ ìtẹ̀ ìlu ihò
Ẹ̀rọ ìfá orí tábìlì2
2
Roll and weld
Roll and weld
Bend the strip into a tube with the teeth at one end, weld the seam and grind off the bead.
Àwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ ìdàpọ̀ ojú-ìsopọ̀ páìpùẸ̀rọ ìfá orí tábìlì3
3
Harden
Harden
Heat-treat the tube to harden the teeth.
Àwọn irinṣẹ́ tí a nílò:
Ìléru ìmúle àti àtúnṣe ọ̀já4
4
Cap and arbor
Cap and arbor
Fit the cap; the saw is driven by an arbor carrying the pilot drill.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Ọ̀pá ayùn ihò pẹ̀lú ìdí lu atọ́nà1 ẹyọÀwọn ohun-èlò
2- Àyè
Àwọn irinṣẹ́ tó nílò
4Ìtọ́nisọ́nà yìí ń ṣe
Blueprint tó jọra
Àwọn blueprint wọ̀nyí pín ìmọ̀ — ọ̀nà, ohun-èlò tàbí ìlànà
CC0 Àgbègbè Gbogbogbò
Blueprint yìí ti jáde lábẹ́ CC0. O lè ṣe àdàkọ, yí padà, pín, àti lò láìsí ìyọ̀ǹda.
Ṣàtìlẹ́yìn Olùṣẹ́dá nípa rírà àwọn ọjà nipasẹ̀ Blueprint wọn Ẹ̀san Olùṣẹ́dá tí àwọn Olùtajà gbé kalẹ̀, tàbí ṣẹ̀dá àtúnṣe tuntun ti Blueprint yìí kí o sì fi sínú Blueprint rẹ gẹ́gẹ́ bí ìsopọ̀ láti pín owó-wíwọlé.