German Hans Oetiker workholding fixtures Hans Oetiker models Hans Oetiker prices

Hans Oetiker workholding fixtures are machine tool accessories produced based on the electromagnetic principle. When the internal coil is energized, it generates magnetic force that passes through the magnetically conductive panel to firmly hold the workpiece in contact with the panel surface. De-energizing the coil eliminates the magnetic force, allowing demagnetization and removal of the workpiece. Primary applications include workpiece fixation during machining of ferrous materials on grinding machines, electromagnetic knife grinders, gantry milling machines, and gantry planers. Rectangular electromagnetic chucks have lifting screw holes on both sides; insert T-head screws for lifting, and secure to the workbench using T-blocks and screws. Connect the DC power supply and ground wire from the machine tool, then precision grind the upper surface of the chuck once to ensure parallelism between the top and bottom surfaces. When holding a workpiece, sufficient positioning holding force is achieved by bridging two adjacent magnetic poles, allowing grinding operations. Magnetization and demagnetization of the workpiece can be controlled via the machine tool buttons.

Hans Oetiker workholding fixture requirements

Whether clamping or suction-type, robot end-effectors must meet the repeatability accuracy required for the task. 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, more universal robot end-effectors have simpler structures but high working efficiency and can perform various tasks. In contrast, "universal" end-effectors may have disadvantages such as complex structures and high costs. Therefore, the design and use of serialized, standardized, dedicated robot end-effectors that can be quickly replaced is recommended. If an object has two opposing flat surfaces, a double-jaw parallel gripper can be used to address dimensional deviation issues. For cylindrical objects, double-jaw grippers can also be used for clamping. Note that retaining or encompassing gripping requires less force.

Hans Oetiker workholding fixture features

1) Chuck holding force: Electronically controlled powerful chucks offer superior holding force, up to 16kg/cm², with uniform and adjustable magnetic distribution, suitable for various heavy-duty machining, roughing, and finishing operations. Standard powerful chucks have weaker and uneven holding force, unable to meet heavy-duty machining requirements. 2) Machining accuracy: The holding force of electronically controlled powerful chucks does not require continuous power supply, generating no heat during continuous operation, thus avoiding thermal deformation of the workpiece. The strong and uniform surface holding force ensures highest machining accuracy even if the workpiece overhangs the table. In contrast, standard electromagnetic chucks require continuous current supply, generating heat after prolonged operation, which causes workpiece thermal deformation and reduces chuck magnetic force, compromising machining accuracy. 3) Performance: Electronically controlled powerful chucks can operate continuously without failure or maintenance, even when running 20 hours daily. Standard permanent magnet chucks show decreased holding force after about six months, while electromagnetic chucks can only operate for a few hours daily, are prone to failures, and require frequent replacement and maintenance of internal components. 4) Operational efficiency: Using standard powerful chucks requires significant workpiece adjustment time, accounting for 40%-50% of the entire machining process, with obvious errors in clamping and positioning, high scrap rates, and very low efficiency. Electronically controlled powerful chucks feature automatic auxiliary positioning; simply pressing a button completes workpiece clamping or release in 0.3 seconds, significantly improving production efficiency.

Hans Oetiker workholding fixture usage

With the continuous development of China's industry, the use of electromagnetic chucks in industrial production is becoming increasingly widespread. The most important aspects of an electromagnetic chuck are its parameters, particularly the lifting capacity and working class. The lifting capacity of an electromagnetic chuck refers to the maximum weight allowed to be lifted under specified working conditions, also known as the rated lifting capacity. Generally, the lifting capacity of cranes equipped with electromagnetic chucks should include the weight of the chuck itself. Rectangular electromagnetic chucks have lifting screw holes on both sides; insert T-head screws for lifting, and secure to the workbench using T-blocks and screws. Connect the DC power supply and ground wire from the machine tool, then precision grind the upper surface of the chuck once to ensure parallelism between the top and bottom surfaces. When holding a workpiece, sufficient positioning holding force is achieved by bridging two adjacent magnetic poles, allowing grinding operations. Magnetization and demagnetization of the workpiece can be controlled via the machine tool buttons. Before using an electromagnetic chuck, wipe the surface clean to avoid scratches. Avoid severe impacts to prevent affecting accuracy. After use, clean and apply anti-rust oil to prevent corrosion. When using an electromagnetic chuck independently, ensure a ground wire is connected to prevent electric shock hazards.

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