German TORWEGGE workpiece fixtures TORWEGGE model TORWEGGE price

TORWEGGE workpiece fixtures are one of the actuators for vacuum equipment. Generally, using vacuum suction cups to grip products is the most cost-effective 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 them. Typically, to avoid scratching the surface of the product, it is best to choose suction cups with bellows 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.

TORWEGGE workpiece fixture operating principle

The most widely used grippers are pneumatic grippers; they are essentially cylinders powered by compressed air. When air is supplied, the gripper jaws approach and firmly grasp the object to perform other operations, and when the air direction is reversed, the gripper releases the object. Typical applications include changing the orientation of an object or moving it during pick-and-place operations. When a gripper holds a workpiece, there must be certain force constraints and form constraints to ensure that the clamped workpiece is fully released during movement, dwelling, and loading. In addition, it must ensure that the geometric deviation of the workpiece holding posture remains within the specified tolerance zone.

TORWEGGE workpiece fixture features

1) Standardization: The standardization and generalization of machine tool fixtures are two interrelated aspects. China already has national standards for fixture parts and components: GB/T2148~T2259－91, as well as standards for various general-purpose fixtures and modular fixtures. The standardization of machine tool fixtures facilitates commercial production of fixtures, helps shorten production preparation cycles, and reduces total production costs. 2) Precision: As the precision of mechanical products continues to improve, the precision requirements for fixtures inevitably increase accordingly. There are many structural types of precision fixtures, such as multi-tooth discs for precise indexing, with an indexing accuracy of ±0.1"; and high-precision three-jaw self-centering chucks for precision turning, with a centering accuracy of 5μm. 3) High efficiency: High-efficiency fixtures are mainly used to reduce the basic and auxiliary time of workpiece processing, thereby improving labor productivity and reducing workers' labor intensity. Common high-efficiency fixtures include automated fixtures, high-speed fixtures, and fixtures with clamping force devices. For example, using an electric vise to clamp workpieces on a milling machine can improve efficiency by about 5 times; using a high-speed three-jaw self-centering chuck on a lathe ensures that the jaws can still firmly clamp the workpiece at a test speed of 9000r/min, thereby significantly increasing the cutting speed. In addition to configuring corresponding high-efficiency and automated fixtures on production lines and automatic lines, various fixtures for automatic workpiece clamping and automatic fixture changing devices have appeared on CNC machines, especially machining centers, fully leveraging the efficiency of CNC machines. 4) Flexibility: The flexibility of machine tool fixtures is similar to that of machine tools, referring to the ability of machine tool fixtures to adapt to variable process factors through adjustment, combination, etc. The main variable process factors include: process characteristics, production batch size, workpiece shape and dimensions, etc. New types of fixtures with flexibility features mainly include: modular fixtures, general-purpose adjustable fixtures, group fixtures, modular fixtures, and CNC fixtures. To meet the needs of modern mechanical industry for multi-variety, small-batch production, expanding the flexibility of fixtures, changing the non-disassemblable structure of special-purpose fixtures to a disassemblable structure, and developing adjustable fixture structures will be the main direction of fixture development.

TORWEGGE workpiece fixture maintenance

1) Check before use whether the limit dimensions are still in the correct position. 2) If the stop pin wear exceeds tolerances, it can be repaired by grinding; if the baffle, pin, or positioning cone pin wear exceeds tolerances, they can be reassembled, offsetting the worn areas for continued use. 3) Apply anti-rust oil after use. Regular long-term lubrication can maintain the life of synchronous fixtures; incorrect lubrication will lead to reduced clamping force, poor precision, wear, and jamming, so proper lubrication is essential. After processing, be sure to clean the body and slide ways of the synchronous fixture with an air gun or similar tool. During cleaning, remove the dust cover fixing screws and take off the dust cover, while extending the main jaws to their widest position to easily clean accumulated chips inside the fixture. To avoid reduced clamping force due to rust, use rust-preventive cutting oil. Remove the synchronous fixture for thorough cleaning every six months (at least every two months if machining cast iron or copper products). Also check for any damage or wear on parts, and replace with new ones immediately if severe. Lubricate thoroughly before assembly.

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