German Hans Oetiker workholding fixtures, Hans Oetiker models, Hans Oetiker pricing

Hans Oetiker workholding fixtures are machine tool accessories produced based on the electromagnetic principle. They generate magnetic force by energizing internal coils, tightly holding workpieces in contact with the surface through a magnetically conductive panel. Demagnetization and workpiece removal are achieved by de-energizing the coils to eliminate the magnetic force. Main applications include workpiece fixation during the machining of ferrous materials on grinders, electromagnetic knife grinders, gantry milling machines, and gantry planers. Rectangular electromagnetic chucks have lifting screw holes on both sides; T-shaped screws can be screwed in for lifting during installation, and they are fixed to the workbench using T-shaped 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 upper and bottom surfaces. When holding workpieces, sufficient positioning holding force is obtained 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 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 are generally simpler in structure but offer high efficiency and can perform various tasks. In contrast, "universal" end-effectors may have disadvantages such as complex structures and high costs. Therefore, it is recommended to design and use serialized, standardized, dedicated robot end-effectors that can be quickly changed. 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 grips require less force.

Hans Oetiker workholding fixture features

1) Chuck holding force: Electrically controlled powerful chucks offer superior holding force, up to 16kg/cm², with uniform and adjustable magnetic distribution. They are suitable for various heavy-duty machining, roughing, and finishing operations. Ordinary powerful chucks have weaker and uneven holding force, unable to meet the requirements of heavy-duty machining. 2) Machining accuracy: The holding force of electrically controlled powerful chucks does not require continuous power connection to maintain. No heat is generated during continuous operation, avoiding thermal deformation of the workpiece. Meanwhile, the strong and uniform surface holding force ensures the highest machining accuracy even if the workpiece extends beyond the table surface. In contrast, ordinary electromagnetic chucks require a continuous current supply, generating heat after a period of operation. This not only causes thermal deformation of the workpiece but also reduces the chuck's magnetic force, failing to guarantee machining accuracy. 3) Performance: Electrically controlled powerful chucks can be used continuously without any faults or maintenance, even when operating continuously for more than 20 hours per day. Ordinary permanent magnet chucks show a decline in holding force after about half a year of use, while electromagnetic chucks can only operate for a few hours a day. They are prone to failures and require frequent replacement and maintenance of internal components. 4) Operational efficiency: Using ordinary powerful chucks requires significant time for workpiece adjustment, accounting for 40%-50% of the entire machining process. Clamping and positioning are prone to obvious errors, resulting in high scrap rates and very low efficiency. Electrically 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 aspect of an electromagnetic chuck is its parameters, with lifting capacity and working class being the primary performance parameters. The so-called 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 a crane equipped with an electromagnetic chuck should include the weight of the chuck itself. Rectangular electromagnetic chucks have lifting screw holes on both sides; T-shaped screws can be screwed in for lifting during installation, and they are fixed to the workbench using T-shaped 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 upper and bottom surfaces. When holding workpieces, sufficient positioning holding force is obtained by bridging two adjacent magnetic poles, allowing grinding operations. Magnetization and demagnetization of the workpiece can be controlled via the machine tool buttons. Before use, wipe the surface of the electromagnetic chuck clean to avoid scratches. Severe impacts are prohibited to prevent affecting accuracy. After use, clean thoroughly and apply anti-rust oil to prevent corrosion. When using an electromagnetic chuck independently, a ground wire must be connected to prevent electric shock due to leakage.

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