German schaublin workholding fixtures schaublin model schaublin price

schaublin workholding fixtures are devices that hold objects for manipulation. They can grip and release objects while performing certain actions. Motion devices often mimic human movements; 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 gripping actions: External gripping: 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 holds the object. Internal gripping: In some applications, due to the geometry of the object or the need to access the exterior of the object, it is necessary to grip the object from the center. In this case, the gripper holds the object through expansion force.

schaublin workholding fixture operating principle

The most widely used grippers are pneumatic grippers; they are essentially cylinders powered by compressed air. When air is supplied, the gripper jaws approach and firmly grasp the object to perform other operations, and when the air direction is reversed, the gripper releases the object. Typical applications include changing the orientation of an object or moving it during pick-and-place operations. When the gripper holds a workpiece, there must be certain force constraints and form constraints to ensure that the clamped workpiece is fully released during movement, dwelling, and loading. In addition, it must ensure that the geometric deviation in the repeatability of the workpiece clamping posture remains within the specified tolerance zone.

schaublin workholding fixture structure

The 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. When the end effector holds a workpiece, there must be certain force constraints and form constraints to ensure that the clamped workpiece is fully released during movement, dwelling, and loading. In addition, it must ensure that the geometric deviation in the repeatability of the workpiece clamping posture remains within the specified tolerance zone.

schaublin workholding fixture selection

When selecting pneumatic grippers and jaw designs, these are the main factors to consider: 1) Part shape, orientation, and size variations: If the object has two opposing flat surfaces, a parallel two-jaw gripper can be used to address size deviations. For cylindrical objects, a two-jaw gripper can also be used for holding. Note that containment or enveloping grips require less force. 2) Part weight: The gripping force must be sufficient to hold the object steady while performing the required operations. The type of jaw design must be considered when calculating the required gripping 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 task being performed and to the spatial requirements of the gripper jaws. If work needs to be done on the exterior of the object, internal gripping is required. Scissor-type grippers are usually less expensive 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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