German GRIP workpiece clamping fixtures GRIP model GRIP price

GRIP workpiece clamping fixtures are one of the actuators for vacuum equipment. Generally, using vacuum suction cups to grip products is the most economical method. Vacuum suction cups come in various types; rubber suction cups can operate at high temperatures, silicone rubber suction cups are very suitable for gripping products with rough surfaces, and polyurethane suction cups are highly durable. Additionally, in actual production, if oil resistance is required for the suction cups, materials such as polyurethane, nitrile rubber, or vinyl-containing polymers can be considered for manufacturing. Typically, to avoid scratching the product surface, it is best to choose bellows-type suction cups made of nitrile rubber or silicone rubber. The suction cup material is made of nitrile rubber, which has high tensile strength, and is therefore widely used in various vacuum holding devices.

GRIP workpiece clamping fixture requirements

Whether clamping or adsorption type, the robot's end effector must meet the repeatability accuracy required for the operation. The structure of the robot end effector should be as simple and compact as possible, with light weight, to reduce the load on the arm. Dedicated robot end effectors have a simpler structure than general-purpose ones, but offer high work efficiency and can perform various tasks. In contrast, "universal" end effectors may have disadvantages such as complex structure and high cost. Therefore, it is recommended to design and use serialized, standardized, dedicated robot end effectors that can be quickly replaced. If an object has two opposing flat surfaces, a double-jaw parallel gripper can be used to address dimensional deviation issues. For cylindrical objects, a double-jaw gripper can also be used for clamping. It should be noted that retaining or encompassing clamping requires less force.

GRIP workpiece clamping fixture process

The electromagnetic chuck consists of a base housing, iron core, coil, faceplate, and junction box. Its manufacturing process is as follows: 1) Select suitable materials for welding or casting the base housing. 2) Install the iron core onto the base housing according to the different types of chucks. 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 waterproof materials into the interior of the base housing. 5) Manufacture the faceplate and install it together with the base housing part. Electromagnetic chucks use DC power supply and feature stability, strong holding force, and low residual magnetism. Electromagnetic chucks can be classified into standard holding force chucks and high-power chucks. The holding force of standard chucks is 10-12 kg/cm², while high-power electromagnetic chucks are not less than 14 kg/cm². According to application, they can be divided into electromagnetic chucks for grinders, electromagnetic chucks for milling and planing machines, electromagnetic chucks for knife grinding machines, etc.

GRIP workpiece clamping fixture maintenance

When using vacuum suction cups (without clamps), note that the manipulator's movement speed should not be too high; otherwise, shear forces will be generated on the suction cup, causing the product to drop easily during rapid twisting. In some cases, a clamp can be used to ensure safe transport of the product. Considering the possibility of the product sticking to the mold, an air clamp can usually be installed to solve this problem. When the product surface area is too small or the product is too heavy for vacuum suction cups, the issue can also be resolved by using clamps. If the product has strict appearance requirements, the clamped area must not be the outer surface. To address this, a sensor circuit can be installed. After confirming that the clamp or suction cup has securely gripped the product, the sensor sends a signal to the manipulator to proceed with the next operation. In cases where the manipulator's motion capability is limited and manual twisting or prying is required to demold or remove the product from the forming area, a special cylinder capable of independent movement, not relying on manipulator operation, can be added to improve the situation.

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