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Broaching a Keyway: A Steel Pulley Turned, Bored and Keyed
A broach is a long cutter whose teeth get a little taller one after another, so one push through a hole cuts a finished shape. Broaching began in the 1850s for exactly this job: cutting the keyway in a pulley or gear so it can be locked to its shaft.
Katamtaman
Half a day
Mga Tagubilin
1
1
Watch: what is broaching?
Watch: what is broaching?
Broaching types, the machine and the broach's teeth, in a short course preview.
2
2
Turn the pulley
Turn the pulley
Saw a slice of round bar, face both sides and turn the rim to size on the lathe.
Mga materyales para sa hakbang na ito:
Bilog na barang asero na malambot1 pirasoMga kailangang kasangkapan:
Lagaring Pang-metal
Torno para sa Metal
Langis sa paggupit
Kalipers na Vernier3
3
Bore it for the shaft
Bore it for the shaft
Drill and bore the centre to fit the shaft, and break the sharp edges.
Mga kailangang kasangkapan:
Torno para sa Metal
Baras sa panloob na paggupitKalipers na Vernier
Hanay ng Kikil4
4
Set up the horn and broach
Set up the horn and broach
Slide the horn (the slotted bushing) into the bore and set the pulley flat on the arbor press table. Drop the keyway broach into the horn's slot, teeth facing the bore wall, small end first.
Mga kailangang kasangkapan:
Gabay na bushing ng broach
Broach na pang-uka ng keyway
Prensang may palanke5
5
Push it through in one stroke
Push it through in one stroke
Oil the broach and press it straight through in one steady stroke. Each tooth cuts a little deeper than the last, so the keyway comes out finished.
Mga kailangang kasangkapan:
Prensang may palankeBroach na pang-uka ng keywayLangis sa paggupit6
6
Clean and check
Clean and check
Take out the broach and horn, clear the chips and check the key slides in snugly.
Mga kailangang kasangkapan:
Kalipers na VernierHanay ng KikilMga Materyales
1- Placeholder
Mga Kinakailangang Kasangkapan
9- Placeholder
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