German Forkardt workpiece fixtures Forkardt models Forkardt prices

Forkardt workpiece fixtures are devices used on machine tools to clamp workpieces and guide cutting tools. They refer to fixtures specifically designed for a particular operation on a specific workpiece. Their features include a compact structure, rapid, convenient, and labor-saving operation, ensuring high machining accuracy and production efficiency. However, the design and manufacturing cycle is long, and manufacturing costs are high. When the product changes, the fixture becomes obsolete and is scrapped because it can no longer be used. It is only suitable for production with fixed products and large batch sizes. It contacts the positioning datum of the workpiece to determine the correct position of the workpiece in the fixture, thereby ensuring the correct relative position of the workpiece with respect to the cutting tool and the machine tool's machining motion during processing. It typically consists of positioning elements, clamping devices, tool-setting and guiding elements or devices.

Forkardt workpiece fixture types

1) Standard rectangular electromagnetic chuck Application: Rectangular table surface grinders. 2) High-power electromagnetic chuck Application: Milling machines, planers, machining centers. 3) Fine-pole electromagnetic chuck Application: Rectangular table surface grinders, milling machines. 4) Multi-function high-power electromagnetic chuck Application: Rectangular table surface grinders. 5) Rotary electromagnetic chuck Application: Various surface grinders. 6) Electromagnetic chuck for tool grinding Application: Tool grinding machines. 7) Circular electromagnetic chuck (concentric type) Application: Rotary table surface grinders. 8) Circular electromagnetic chuck (radial pole type) Application: Rotary table surface grinders. 9) Circular electromagnetic chuck (plum blossom pole type) Application: Rotary table surface grinders. An electromagnetic chuck is an electromagnetic fixture that secures the workpiece being machined through the suction force generated by the chuck body when the electromagnetic coil is energized. The electromagnetic chuck consists of several parts, including an iron core, coil, faceplate, and bracket. The electromagnet, composed of the coil and iron core, is the main part of the electromagnetic chuck.

Forkardt workpiece fixture structure

The mechanical gripper-type end effectors used in loading and unloading industrial robots are mostly two-finger claw types. According to the motion of the fingers, they can be divided into translational and rotational types. According to the mechanical clamping method, they can be divided into external clamping and internal expansion types. According to the mechanical structural characteristics, they can be classified as electric (electromagnetic), hydraulic, and pneumatic types, as well as their combinations. When the end effector clamps the workpiece, there should be certain force constraints and shape constraints to ensure that the clamped workpiece is completely released during movement, dwelling, and loading processes. In addition, it should ensure that the geometric deviation of the workpiece clamping posture reproduction is within the given tolerance zone.

Forkardt workpiece fixture selection

When selecting pneumatic grippers and jaw designs, these are the main factors to consider: 1) Part shape, orientation, and dimensional variations: If the object has two opposing flat surfaces, a double-jaw parallel gripper can be used, which addresses dimensional deviation issues. For cylindrical objects, a double-jaw gripper can also be used for clamping. Note that containment or enveloping clamping requires less force. 2) Part weight: The clamping force must be sufficient to hold the object securely while performing the required operations. The type of jaw design must be considered when calculating the required clamping force. Please note that safety factors should be considered when selecting the required force, and air pressure is also a factor to note. 3) Accessibility: This relates both to the operation being performed and the spatial size of the gripper jaws. If work is to be performed on the exterior of the object, internal clamping is required. Scissor-style grippers are usually lower in price but require more space for jaw movement. 4) Environment: Grippers used in harsh environments or cleanrooms require corresponding designs. 5) Object retention: When air pressure is no longer supplied, the gripper will release its hold on the object, causing it to drop. For such applications, spring-assisted grippers can be used.

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