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Steel Balls for Ball Bearings: Headed, Ground and Lapped
Bearing balls start as steel wire: cut into short pellets, pressed into rough spheres, rolled round between grooved plates, hardened, then ground and lapped until they are almost perfectly round and smooth.
高级
Works process
说明
1
1
Watch: how ball bearings are made
Watch: how ball bearings are made
How It's Made: ball bearings, from steel to finished balls and rings.
2
2
Shear and head
Shear and head
Shear the wire into pellets of about the ball's volume. Head each pellet into a rough sphere.
此步骤所需材料：
弹簧钢丝1 as required所需工具：
斜口钳
冷镦机3
3
Roll off the flash
Roll off the flash
Run the balls between rill plates, one fixed and one turning, with coolant pumped between them. This takes off the flash and rounds them; the pressure also hardens the surface a little.
所需工具：
沟槽板磨球机
切削油4
4
Harden and descale
Harden and descale
Heat-treat the steel balls (harden and quench), then tumble off the scale.
所需工具：
热处理炉
淬火水桶
去飞边滚筒5
5
Grind and lap
Grind and lap
Hard-grind them in the same kind of machine with a fine grinding wheel or abrasive in the coolant, to within about a ten-thousandth of an inch. Lap them for more precision. Check sizes with a micrometer.
所需工具：
砂轮沟槽板磨球机
钢球研磨机
研磨剂
千分尺6
6
Limits
Limits
Process from Wikipedia's Bearing ball article. Wikipedia lists chrome steel among bearing-ball steels; high-carbon spring-steel wire is our choice here.
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