GF grippers, German GF models, GF prices

GF grippers are devices that hold objects for manipulation. They can clamp and release objects while performing certain actions. Motion devices often mimic human movement; in the case of grippers, they mimic finger movements. The "fingers" themselves are not part of the gripper; they are specialized custom tools for holding objects, known as "jaws." Two main clamping actions: External clamping: This is the most common method for holding objects. It is the simplest and requires the shortest stroke length. When the gripper jaws close, the clamping force applied by the gripper clamps the object. Internal clamping: In some applications, due to the geometry of the object or the need to access the exterior of the object, it is necessary to clamp the object from the center. In this case, the gripper holds the object through expansion force.

GF gripper 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 pole type). Application: Circular table surface grinders. 8) Circular electromagnetic chuck (radial pole type). Application: Circular table surface grinders. 9) Circular electromagnetic chuck (flower pole type). Application: Circular table surface grinders. An electromagnetic chuck is an electromagnetic fixture that secures the workpiece using the suction force generated by the chuck body when the electromagnetic coil is energized. The electromagnetic chuck consists of several parts, including the iron core, coil, faceplate, and bracket. The electromagnet, composed of the coil and iron core, is the main part of the electromagnetic chuck.

GF gripper manufacturing process

The electromagnetic chuck consists of a base housing, iron core, coil, faceplate, and junction box. The manufacturing process is as follows: 1) Select suitable materials to weld or cast the base housing. 2) Install the iron core onto the base housing according to the type of chuck. 3) Wind the coil with the corresponding number of turns and technical parameters, dry it, and fit it onto the iron core. 4) Pour asphalt or other waterproofing materials into the interior of the base housing. 5) Fabricate the faceplate and install it together with the base housing. Electromagnetic chucks use DC power supply and feature stability, strong suction force, and low residual magnetism. Electromagnetic chucks can be classified into standard suction chucks and high-power chucks. The suction force of standard suction chucks is 10-12 kg/cm², while high-power electromagnetic chucks are no less than 14 kg/cm². Based on application, they can be classified into electromagnetic chucks for grinders, electromagnetic chucks for milling machines and planers, and electromagnetic chucks for tool grinding machines.

GF gripper classification

Mechanical gripping end-effectors used in loading and unloading industrial robots are mostly two-finger claw types. Classified by finger motion, they can be divided into translational and rotary types. Classified by mechanical gripping method, they can be divided into external clamping and internal expanding types. Classified by mechanical structural characteristics, they can be divided into electric (electromagnetic), hydraulic, and pneumatic types, as well as combinations thereof. 1) Vacuum suction type: Vacuum suction robot end-effectors use the suction force generated by negative pressure inside the suction cup to hold and move workpieces. The suction cup creates negative pressure in a bellows made of soft rubber or plastic to hold the workpiece. This type of robot end-effector is suitable for handling large, thin, low-rigidity metal or wooden sheets, paper, glass, and curved shells. Depending on the application, the end-effector can be configured with single, double, multiple, or specially shaped suction cups. Methods for generating negative pressure include: squeeze-type suction cups, airflow negative pressure suction cups, and vacuum pump exhaust suction cups. Squeeze-type suction cups: Squeeze-exhaust suction cups expel all air from the cup by downward squeezing force, creating a negative pressure state inside to hold the workpiece. Advantages include simple structure, light weight, and low cost. However, the suction force is not large, so they are mostly used for workpieces that are not too large in size, thin, and light. Airflow negative pressure suction cups: An airflow control valve injects compressed air from an air pump through a nozzle, forming a high-speed jet that removes air from the suction cup cavity, creating negative pressure to hold the object. This type is convenient and low-cost if compressed air is available at the worksite. Vacuum pump exhaust suction cups: Vacuum pump exhaust suction cups connect the vacuum pump to the suction cup via an electromagnetic control valve. When the control valve evacuates air, negative pressure forms inside the cup to hold the object. Conversely, when the control valve connects the suction cup to the atmosphere, the suction force is lost, releasing the workpiece. The suction force of vacuum pump suction cups mainly depends on the adsorption area of the suction cup and the degree of vacuum inside the q cavity (referring to the thinness of the air inside). This type of suction cup is reliable and provides strong suction force, but requires a vacuum pump and airflow control system, resulting in higher costs. 2) Mechanical clamping type: Structure of a straight-bar dual-cylinder translational gripper. The gripper fingertips are mounted on a straight bar equipped with fingertip mounts. When pressurized gas enters the rod-side chambers of the two single-acting dual cylinders, the two pistons move toward the center, clamping the workpiece. When no pressurized gas enters, springs push the two pistons outward, releasing the workpiece. A flow divider valve is installed in the cylinder intake line to ensure synchronized piston movement. This type of end-effector is used in loading and unloading assembly stations.

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