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Pliers: Drop-Forged Halves and a Box Joint
In box-joint pliers one half passes through a slot in the other. Such pliers were once made wholly by hand forging; an 1888 patent describes making them from drop-forgings instead. Both halves are forged in dies, the outer one with its joint left solid. A rotating cutter is run in from one side and then the other to cut the opening, and the small ridges left inside are filed away. The outer half is then heated, the sides of the opening spread just enough for the inner half's jaw or handle to pass through, closed again, and the two halves are pivoted together, the pivot often being a rivet. Flat-, round- and needle-nose pliers differ in the shape of their jaws.
高级
Factory process
说明
1
1
Drop-forge the halves
Drop-forge the halves
Forge both halves in dies; leave the joint of the outer half solid.
此步骤所需材料：
碳素钢棒（0.6 % C）1 as required所需工具：
带锻模的落锤2
2
Cut the opening
Cut the opening
Run the rotating cutter into the joint of the outer half from one side, then reverse the work and cut from the other side; file away the small ridges left inside.
所需工具：
旋转铣刀
金属锉3
3
Spread and pass
Spread and pass
Heat the outer half, spread the sides of the opening just enough, and pass the jaw or handle of the inner half through.
所需工具：
铁匠炉4
4
Close and pivot
Close and pivot
Close the sides back to their normal position and pivot the two halves together with a rivet.
此步骤所需材料：
钢铆钉1 个所需工具：
台钻
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