In Metal parts machining works, screw thread (tapping) be required.
The screw thread is mainly divided into: connecting thread and driving thread
For connecting thread, the main machining methods are: tapping, threading, turning, rolling, etc.
For transmission thread, the main machining methods are: rough and fine turning – grinding；whirlwind milling – rough and fine turning, etc.
The following describes the various screw machining methods:
THREAD CUTTING
Generally, it refers to the method of machining thread on workpiece with forming tool or grinding tool, mainly including turning, milling, tapping, threading, grinding and whirlwind cutting, etc.
THREAD MILLING
On the thread milling machine, the disc milling cutter or comb milling cutter is used for milling. Disc milling cutter is mainly used for milling trapezoid external thread of screw rod, worm and other workpieces. Comb milling cutter is used for milling internal and external common thread and taper thread.
THREAD GRINDING
It is mainly used to process the precision thread of hardened workpiece on the thread grinder. According to the different cross-section shape of grinding wheel, there are two kinds of grinding: single line grinding wheel and multi line grinding wheel.
THREAD GRINDING
The nut type or screw type thread lapping tool is made of soft materials such as cast iron. The parts of the processed thread on the workpiece with pitch error are grinded by forward and reverse rotation to improve the pitch accuracy. The hardened internal thread is usually eliminated by grinding to improve the accuracy.
TAPPING AND THREADING
Tapping is to use a certain torque to screw the tap into the pre-drilled bottom hole on the workpiece to machine the internal thread. Threading is to cut the external thread on the bar (or tube) workpiece with a die.
KYLT Precision CNC machining services (milling & turning service), Fast prototyping, Fixture/Jig/Tooling making, Aluminum die casting & plastic injection parts. Email:cnkylt@aliyun.com +008615195010186
KYLT CNC Machining Services:
KYLT CNC Precision Machined Parts:
More information about Machining Technology:
评论
发表评论