1. Vacuum Tables

A vacuum table is a system that is used to hold parts or workpieces for CNC machining. these systems have several components like a vacuum chamber a vacuum pump etc. Workpieces are held due to the pressure difference between the vacuum chamber and the outside air pressure.
Vacuum tables consist of flat surfaces having holes in that surface. these types of clamping techniques are applied in Mills and EDMs.

2. Adhesive Fixtures

There are several advantages of adhesive fixture techniques the following key points are the main ones;

• When you are required to perform multiple operations on multiple sides of the workpiece generally on 5 Axis Milling machining you need to adopt this kind of fixture.

• It can hold and provide support for variable geometry parts of the complexity.

• easy to install and remove.
  

3. T-Slot Tables

The T-slot table is a type of machine table commonly used in CNC machining centers to hold workpieces securely in place.

Unlike methods like vacuum clamping used in some applications, T-slot tables rely on fastening elements. These elements are inserted into the T-shaped slots on the table and then tightened with screws to secure the workpiece.

While T-slot tables are not often seen in woodworking, they are essential in industries such as plastics and metalworking. They are versatile tools used across various machines to clamp workpieces effectively during machining processes.

4. Suction Cups

Double-acting suction cups used on CNC machines provide a dependable and precise method to secure and work on marble slabs and other materials on the CNC machining center's worktable. These suction cups use a vacuum system designed specifically for processing various materials like marble, granite, quartz, glass, wood, and plastics. They securely hold the slab in position during operations such as cutting, shaping, and drilling around the edges, ensuring efficient and precise machining.

5. Magnetic Chucks

Electropermanent magnetic chucks require electricity only briefly at the start and end of the clamping process to activate and deactivate their magnetic field. They consume very little power and remain safe even if there's a power outage, unlike electromagnetic chucks which need continuous electricity to function.

Installing an electro-permanent magnetic chuck is straightforward and doesn't require a certified electrician. Round chucks come with a connector on the side where you attach an electric cable. Once activated, the cable can be removed without obstructing machining operations or needing to thread it through the chuck.

However, electro-permanent chucks have limitations. They can't adjust the clamping force gradually but instead, increase it in large increments. Adjusting down requires fully deactivating the chuck, possibly running a demagnetization cycle on the workpiece.

One significant advantage is that electro-permanent chucks don't need to be constantly powered to maintain their grip, which prevents them from heating up. This stability is crucial for maintaining precision during machining, as higher temperatures can negatively affect accuracy. For precision-focused production environments, electro-permanent magnetic chucks are highly recommended.

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