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Frank A. Stanley · Public domain (1919)
Steel Dowel Pins: Two from One Piece, Necked, Hardened and Ground (Stanley 1919)
Die makers made their own dowel pins two at a time: one piece of steel is turned, necked in the middle, hardened, ground dead straight to size from each end, then snapped in two at the neck. Frank Stanley described the practice of one die shop.
Source: F. A. Stanley, Punches and Dies (1919), pp. 417–419. The choice of tool steel and the forge for hardening are ours; the passage gives no hardening heat. Picture: Stanley's Fig. 610, grinding dowel pins.
Pertengahan
1 day
Arahan
1
1
Cut stock for two pins
Cut stock for two pins
Take a length of steel a little larger than the dowel size and long enough for two pins. It must harden, so use tool steel (our choice).
Bahan untuk langkah ini:
Bar keluli alat segi lapan1 length for two pinsAlatan diperlukan:
Ragum Bangku2
2
Turn 0.008 in over size
Turn 0.008 in over size
Turn it on centres to about 0.008 in above the finished size.
Alatan diperlukan:
Mesin Pelarik Logam
Pembawa pelarik
Mikrometer3
3
Neck it in the middle
Neck it in the middle
Cut a neck 1/16 in deep in the middle, the dividing line between the two pins.
Alatan diperlukan:
Mesin Pelarik Logam4
4
Harden
Harden
Harden the piece. This passage gives no heat; heat to hardening heat and quench in the usual way for your steel (ours).
Alatan diperlukan:
Relau tukang besi
Penyepit
Baldi pelindapkejutan5
5
Grind each half to size
Grind each half to size
Put it on dead centres in the grinding machine and grind the diameter to size from one end to the neck. Reverse it on the centres and grind from the other end. The pins come out perfectly straight from end to end.
Alatan diperlukan:
Mesin pencanai silinderPembawa pelarikMikrometer6
6
Break the pins apart
Break the pins apart
Break the piece apart at the neck. You have two dowel pins ground closely to standard size; ream their holes true and straight to fit.
Alatan diperlukan:
Ragum BangkuBahan
1- 1 length for two pinsPemegang Tempat
Alatan Diperlukan
8- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
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