Die Head in Thread Production
– Used in high volume production of threaded fasteners
– Commonly used on lathes, turret lathes, screw machines, and CNC lathes
– Can be used for cutting or rolling threads
– Can be used for internal or external thread cutting
– Typically has four moveable chasers that cut the thread and then retract
Operation of Die Head
– Chasers are inserted into the die head in the correct order
– Die head is closed, bringing the chasers down to their cutting position
– After cutting the thread, the die head opens for rapid retraction
– Allows for rapid removal of the tool and interference-free thread formation
– Different sets of chasers are designed for cutting different threads
Collapsible Die Heads
– Used for cutting internal threads
– Provide flexibility in thread production
– Can be adjusted to accommodate different thread sizes
– Offer efficient and precise internal thread cutting
– Widely used in various industries for different applications
Die Head for Thread Rolling
– Used for thread rolling, which can result in stronger threads
– Rolled threads may require more energy compared to cut threads
– Provides improved thread strength and resistance to fatigue
– Suitable for applications where thread integrity is critical
– Used in industries such as automotive, aerospace, and manufacturing
Further Reading
– Hartness, James (1910). Hartness Flat Turret Lathe Manual: A Hand Book for Operators. Springfield, Vermont and London: Jones & Lamson Machine Company. pp.160–173.
– Group of Hartness Automatic Dies.
– Metalworking
– Machining and computing
– Computer-aided engineering
– 2.5D
– CAD
– CAM
– G-code
– Numerical control (NC and CNC) Source: https://en.wikipedia.org/wiki/Die_head
A die head is a threading die that is used in the high volume production of threaded fasteners.
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Die heads are commonly used on lathes, turret lathes, screw machines and CNC lathes. They may be used for either cutting a thread or rolling a thread. They may also be used for internal or external thread cutting.
In operation, there are usually four moveable chasers that cut the thread then back away from the work to permit rapid removal of the tool. The lower picture at the right shows four sets of chasers. Each set of chasers is designed to cut a different thread. One set of chasers would be used at a time, each chaser is inserted into the die head (in the correct order) and the die head is closed bringing the chasers down to their cutting position. When sufficient length of thread has been cut the die head will open allowing for rapid retraction of the head without interference with the newly formed thread.
The die head shown cuts an outside thread. There are also collapsible die heads that are used to cut an internal thread.
The bottom picture shows a Die Head used for Thread Rolling. A Rolled Thread may have greater strength than a cut thread, though it usually requires more energy to roll a thread than cut one.
