German hottinger workholding fixtures hottinger model hottinger price

hottinger workholding fixture is a machine tool accessory product manufactured based on the electromagnetic principle. It generates magnetic force by energizing internal coils, tightly holding workpieces in contact with the surface of a magnetically conductive panel. Demagnetization and workpiece removal are achieved by de-energizing the coils to eliminate the magnetic force. Main applications include workpiece clamping during the machining of ferrous workpieces on grinding machines, electromagnetic knife grinders, gantry milling machines, and gantry planers. Lifting threaded holes are located on both sides of the rectangular electromagnetic chuck; insert T-shaped screws for lifting during installation, and secure it 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 surface and the bottom surface. When holding workpieces, sufficient positioning holding force is obtained by bridging two adjacent magnetic poles, allowing grinding operations to proceed. Magnetization and demagnetization of the workpiece can be controlled via the machine tool buttons.

hottinger workholding fixture requirements

Whether clamping or suction-type, the robot 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 but relatively universal robot end-effectors have simpler structures, high work efficiency, and can perform various operations. 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 gripping requires less force.

hottinger workholding fixture features

1) Chuck holding force: The electronically controlled powerful chuck has extremely strong holding force, up to 16kg/cm², with uniform and adjustable magnetic distribution. It is 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 the electronically controlled powerful chuck does not require continuous power connection to maintain. It generates no heat 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: The electronically controlled powerful chuck can be used continuously without any faults or maintenance, even when operating continuously for more than 20 hours per day. Ordinary permanent magnetic chucks experience a decline in holding force after about half a year of use. Electromagnetic chucks can only operate for a few hours each day, 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. The electronically controlled powerful chuck features automatic auxiliary positioning. Simply pressing a button completes workpiece clamping or release in 0.3 seconds, significantly improving production efficiency.

hottinger workholding fixture maintenance

1) Before use, check whether the limit dimensions remain in the correct position. 2) If the stop pin wear exceeds tolerance, it can be repaired by grinding. If the baffle, pin, or positioning taper pin wear exceeds tolerance, reassemble them, offsetting the worn areas before continued use. 3) Apply anti-rust oil after use. Regular long-term lubrication maintains the life of the synchronous fixture. Incorrect lubrication leads to reduced clamping force, poor accuracy, wear, and jamming, so proper lubrication is essential. After machining, always clean the body and slide ways of the synchronous fixture using an air gun or similar tools. During cleaning, remove the dust cover fixing screws and take off the dust cover. Extend the main jaws to their widest position to easily clean accumulated chips inside the fixture. To prevent reduced clamping force due to rust, use rust-preventive cutting oil. Remove the synchronous fixture every six months for thorough cleaning (at least every two months when machining cast iron or copper parts). Check parts for damage or wear; replace with new parts immediately if severe. Lubricate thoroughly before assembly.

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