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TEKNOLOJIA
VAZI
Screws: Cold Headed and Thread Rolled
Most screws are made in three steps: heading, thread rolling and coating. Wire from a coil is cut into blanks, and each blank is cold headed: a punch squeezes the end into a die shaped like the head, so a flat head comes from a flat die, with almost no waste. The thread is then rolled, not cut: the blank is rolled between hardened dies that press the thread into it. Rolling makes no swarf, needs a blank 15–20 % lighter than cutting would, gives a 10–20 % stronger thread, and runs at about one piece a second. Most screws are then zinc plated or blackened against rust.
Juu
About one per second (industrial)
Maagizo
1
1
Cut blanks
Cut blanks
Wire from a coil is fed in and cut to the length of the screw: each piece is a blank.
Vifaa kwa hatua hii:
Waya wa chuma10 kgZana zinazohitajika:
Mashine ya kufua vichwa kwa baridi2
2
Head
Head
A punch drives into the end of the blank and the metal flows into the head die. Complex heads take two blows; slotted heads get their slot cut afterwards.
Zana zinazohitajika:
Mashine ya kufua vichwa kwa baridi3
3
Roll the thread
Roll the thread
The blank rolls between two flat dies, one fixed and one sliding, which press the thread into it cold.
Zana zinazohitajika:
Kalibu za kuviringa hesi za skrubu4
4
Coat
Coat
The screws are cleaned and given a coating against rust, such as zinc electroplating or black oxide.
5
5
Check
Check
Length, head and thread diameter are measured on samples.
Zana zinazohitajika:
Kipima-unene cha dijitali cha inchi 6Vifaa
1- 10 kgKishikilia Nafasi
Zana Zinazohitajika
3- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
Mchoro huu unatengeneza
Blueprint zinazohusiana
Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni
CC0 Umma Wote
Mchoro huu umetolewa chini ya CC0. Uko huru kunakili, kubadilisha, kusambaza, na kutumia kazi hii kwa madhumuni yoyote, bila kuomba ruhusa.
Saidia Mtengenezaji kwa kununua bidhaa kupitia Mchoro wao ambapo wanapata Kamisheni ya Mtengenezaji iliyowekwa na Wachuuzi, au unda marudio mapya ya Mchoro huu na uiunganishe kama kiungo katika Mchoro wako kuchangia mapato.