Workholding
Workholding refers to any device that is used to a secure a workpiece against the forces of machining. The most basic workholding device is a simple clamp, but workholding can also involve complex fixtures that are custom-built for particular parts. Other common workholding devices include vises and chucks, as well as indexers or rotary tables that are able to change the part’s position while it is held, so the machine can reach various features. In most machining applications, workholding also locates the part. On a machining center, for example, a vise or fixture may also provide the precise position and orientation where the machining program expects to find the workpiece.
ESSENTIAL READING
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WatchFAQ: Workholding
What is workholding?
Workholding refers to any device that is used to a secure a workpiece against the forces of machining. The most basic workholding device is a simple clamp, but workholding can also involve complex fixtures that are custom-built for particular parts. Other common workholding devices include vises and chucks, as well as indexers or rotary tables that are able to change the part’s position while it is held, so the machine can reach various features.
When should you use flexible workholding?
For shops that handle short-run and one-off jobs, flexible workholding is key to producing work cost-effectively. This might involve quick-change workholding that speeds setups, or solutions that leave the sides of parts free for machining, requiring fewer setups.
When should you use automation-ready workholding?
As more shops add automation, they will need workholding systems that are compatible with the systems they’ve implemented, whether they’re robots, pallet systems or something else.
When should you use ID Workholding?
ID workholding, such as expanding mandrels, has a number of benefits and is suited to a range of applications. These fixtures can provide full access to a part’s OD, providing a rigid, even hold that increases accuracy.
What are some tips to consider when using five-axis workholding?
1. Size the Five-Axis Machine Correctly
2. Consider Augmenting Dovetails
3. Get Out of Your Comfort Zone
What is a collet chuck?
The collet chuck is an alternate workholding device that, like the jaw chuck, also uses mechanical force to hold the part being turned. While a collet chuck lacks the capacity for the same wide range of workpiece sizes that a jaw chuck can accommodate, it offers advantages related to speed, accuracy and productivity that may be crucial for certain jobs.
Source: When To Use A Collet Chuck
Workholding Supplier Categories
- Chucks, Self-Contained
- Dividing & Indexing Heads
- Actuators, Hydraulic & Pneumatic
- Chucks, Gear
- Vises & Vise Jaws
- Mandrels
- Guide Bushings (for Swiss Lathes)
- Angle & Sub Plates
- Chucks, Special
- Chucks, Collet Type (for Workholding)
- All Other Workpiece Handling, Loading & Feeding Equipment not specified
- Indexers & Rotary Tables
- Collets for Workholding
- Clamps & Fixturing Devices
- Chucks, Precision
- Steady Rests
- Centers, Live & Other
- Pedestal Type Fixtures & Tombstone Blocks
- Chucks, Magnetic
- Fixturing Systems
- Workholding, Custom
- Chuck Jaws & Collets
- Chucks, Index
- Chucks, Power
- Chucks, Diaphragm
- Arbors, Expandable Workholding
- Chucks, Vacuum
- Chucks, Jaw Type