German NBK workholding fixtures NBK model NBK price

NBK workholding fixtures are any tools with specific functions connected to the edge (joint) of a robot. This may include robot grippers, robot tool changers, robot collision sensors, robot rotary unions, robot pressure tools, compliance devices, robot spray guns, robot deburring tools, robot arc welding torches, robot electric welding torches, etc. Robot end-effectors are generally considered peripheral equipment for robots, robot accessories, robot tools, and arm-end tools (EOA). Key elements: mechanism type, gripping method, gripping force, drive unit and control object characteristics, mass, shape, center of gravity position, size, dimensional tolerance, surface condition, material, strength, operating parameters, operating space environment, operating accuracy, operating speed and acceleration, clamping time.

NBK Workholding Fixture Classification

1) Lathe fixtures: Fixtures used on lathes to machine internal and external rotational surfaces and end faces of workpieces are called lathe fixtures. Most lathe fixtures are mounted on the spindle, while a minority are mounted on the saddle or bed. 2) CMM fixtures: Used on coordinate measuring machines, utilizing modular support and reference devices to achieve flexible fixation of the measured workpiece. This device allows automatic programming to support the workpiece and establish unlimited workpiece configuration reference points. Advanced dedicated software can directly generate workpiece clamping programs within seconds using the workpiece's geometric data. 3) Industrial robot fixtures: All mounted on industrial robots for use in industrial automation equipment, representing one of the new technologies in modern industrial automation. They primarily appear in modern industrial production in coordination with robots, with common applications in automated unmanned factories for machine loading/unloading, workpiece palletizing/depalletizing, welding, grinding, etc. 4) Milling machine fixtures: All mounted on milling machine tables, moving with the table during feed motion. They mainly consist of positioning devices, clamping devices, fixture bodies, connecting elements, and tool-setting elements. During milling, cutting forces are high and cutting is intermittent, causing significant vibration; therefore, milling fixtures require high clamping force, stiffness, and strength. 5) Bearing housing fixtures: To ensure and improve the production quality of bearing housings, besides using machine tools and other mechanical equipment, a large amount of process equipment is used, including bearing housing fixtures, molds, cutting tools, and related auxiliary tools. A bearing housing fixture is a specialized production tool designed to ensure product quality, making the bearing housing production process more convenient. Different bearing housing fixtures vary in structure, form, operating conditions, and design principles, resulting in a wide variety of types and styles that constitute a significant proportion in both quantity and diversity. This type of fixture accurately determines the relative position between the workpiece and the tool, allowing the workpiece to be clamped securely to perform the necessary motions during machining. Since bearing housing fixtures play a crucial role in the production process, drawing their design diagrams is also very important.

NBK Workholding Fixture Principles and Features

The structure of a flat vacuum suction cup consists of the suction cup and the cup holder. The flat vacuum suction cup is first connected via a pipe to vacuum equipment such as a vacuum generator, then brought into contact with the object to be lifted, such as glass or paper. The vacuum equipment is activated to create negative pressure inside the suction cup, securing the object for transport. When the object reaches its destination, air is gently introduced into the suction cup, changing the internal pressure from negative to zero or slightly positive, releasing the object and completing the lifting and transport task. 1) High wear. Since it is generally made of rubber and directly contacts objects, it suffers severe wear and deteriorates quickly. It is a pneumatic wearable part. Precisely because of this, it stands out significantly among many pneumatic components. 2) Easy to use. Regardless of the material of the object being sucked, as long as it can be sealed without air leakage, it can be used. Electromagnetic chucks cannot do this; they can only be used on steel, not on plates or objects made of other materials. 3) No pollution. Vacuum suction cups are particularly environmentally friendly, causing no environmental pollution, and producing no light, heat, or electromagnetic emissions. 4) No damage to workpieces. Since vacuum suction cups are made of rubber, picking up or placing workpieces causes no damage. Hook-type and steel cable lifting gear cannot guarantee this. In some industries with strict requirements for workpiece surface quality, only vacuum suction cups can be used.

NBK Workholding 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 act 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 that products may stick to the mold, an air clamp is usually installed to solve this problem. When the product's surface area is too small or the product is too heavy for vacuum suction cups, this 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 grasped the product, the sensor sends a signal to the manipulator to proceed to 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 the manipulator, can be added to improve the situation.

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