UBUCIKO
UBUHLE NEMPILO
UBUCIKO BEZANDLA
AMASIKO NOMLANDO
EZOKUZIJABULISA
IMVELO
UKUDLA NEZIPHUZO
REVERSE ENGINEERING
IZAYENSI
EZEMIDLALO
UBUCHWEPHESHE
IZINTO EZIGQOKWAYO
Steel Drawplate with Graded Tapered Holes, and Draw Tongs
A drawplate is a hardened steel plate pierced with a row of tapered holes, each a little smaller than the last. Annealed wire, filed to a point, goes into a hole just smaller than itself and is pulled through with draw tongs, coming out thinner; plates also come with square, half-round or hexagonal holes. Make the plate and the tongs.
The picture: two drawplates with numbered rows of holes.
Osezingeni eliphezulu
Two days
Imiyalelo
1
1
Forge the plate
Forge the plate
Forge tool steel to a flat plate about 150 × 35 × 8 mm (our size) and anneal it.
Izinto zokwakha zalesi sinyathelo:
Induku eyisicaba yensimbi yamathuluzi1 ucezu
Amalahle2 as requiredAmathuluzi adingekayo:
Iziko lomkhandi wensimbi
Insimbi Yokukhandela
Isando esinekhanda elimise okwesikhonkwane
Udlawu lomkhandi wensimbi
Amagilavu okushisela
Izibuko zokuphepha2
2
Drill and taper the holes
Drill and taper the holes
Lay out a row of holes stepping down in size (step 5), drill each, then open it to a taper from the back face with a hot tapered punch, so it is widest at the back and narrowest at the front. True each mouth with a needle file.
Izinto zokwakha zalesi sinyathelo:
Amalahle2 as requiredAmathuluzi adingekayo:
Ibhola lesandlaIziko lomkhandi wensimbi
Isibhobozi esishisayo
Isikhulisi sembobo
Isethi Yamafayela Amancane
I-vice esindayo yebhentshiAmagilavu okushiselaIzibuko zokuphepha3
3
Harden and temper
Harden and temper
Grind the faces flat, harden the plate in water and temper it to a straw colour so the holes keep their size.
Izinto zokwakha zalesi sinyathelo:
Amanzi10 amalithaAmathuluzi adingekayo:
Itshe lokulola eliphendukaIziko lomkhandi wensimbi
Ibhakede lokupholisaUdlawu lomkhandi wensimbiAmagilavu okushiselaIzibuko zokuphepha4
4
Draw tongs
Draw tongs
Forge two short, stout jaws with long reins from wrought iron, file cross teeth in the jaws to bite the wire, rivet them, and bend the end of one rein into a hook so the grip can be held or hauled.
Izinto zokwakha zalesi sinyathelo:
Insimbi yokukhandwa eyinduku2 izicucu
Izipikili zensimbi1 ucezuAmalahle2 as requiredAmathuluzi adingekayo:
Iziko lomkhandi wensimbiInsimbi YokukhandelaIsando esinekhanda elimise okwesikhonkwaneIsibhobozi esishisayo
Insimbi yokuhlikihla izinsimbiUdlawu lomkhandi wensimbiAmagilavu okushiselaIzibuko zokuphepha5
5
Hole sizes
Hole sizes
Ilayisha incwadi ye-Jupyter…
Izinto
5- Isibambeli
- 2 as requiredIsibambeli
- 10 amalithaIsibambeli
- 2 izicucuIsibambeli
- 1 ucezuIsibambeli
Amathuluzi Adingekayo
14- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
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