|
Magnetic chucks are a viable alternative to mechanical methods of workholding and are becoming more common in a variety of metalworking industries. These devices come in a few varieties and forms, so they are compatible with an assortment of metal pieces. For traditionalists, it can be unusual to work without mechanical clamping or holding during metal shaping or milling, but the removal of physical clamping can make a professional’s job much easier.
How do magnetic chucks work?
These devices look like a circular or rectangular box with a flat surface on top and either an on/off switch or key insert on the side. Inside the workholder is a series of inserts that are arranged to increase the flux (the strength of the device’s pull) along the surface of the device. Flux is maximized and makes it possible to secure any ferrous materials placed on top of the device by arranging the insert in a parallel design.
These workholders are available in a few different designs, including permanent, electrically activated and electric-permanent magnets. Equipment that comes with permanent inserts are a popular choice for light material handling and require no power to function. During operation, a key is slid into an insert in the side of the device and turned to align the inserts with conductive material built into the top of the device. In short, it functions like an on/off setting. However, permanent inserts are only compatible with smaller scale workhandling as larger devices would require too much physical force to move the equipment from an on/off position.
Electrically-activated inserts aren’t switched on and off using a key and instead use an electrical current to provide the gripping force required. These devices are generally more powerful but require a constant source of power to function. If power is interrupted, the workholder will cease to function, possibly causing a safety hazard. If there are backup power options present that can immediately switch over in the case of failure, then these devices are an excellent option for powerful workholding.
As the name suggests, electric-permanent devices are a hybrid of the two, providing the benefits of both types of inserts. They are more powerful than permanent devices alone and can be easily switched on and off with a simple electrical switch. However, in the event of a power failure, the permanent inserts will prevent loss of gripping power and maintain safety.
What are the advantages of magnetic chucks?
Metal working professionals constantly need some sort of workholding device when shaping, turning, grinding or drilling so that their work can be done precisely. These devices, unlike mechanical clamping, provide a constant level of gripping power with no variation. The device is either on or off and its power can be accounted for at all times. This improves safety. These tools also provide an equal amount of pressure along the entire body of the ferrous piece, so there is less chance of causing damage to the item. Full support also reduces physical feedback during milling, allowing for faster and more precise cutting or shaping.
When powerful and safe workholding is a top priority in a metal milling facility, these devices can provide everything professionals need to get the job done.
|
