German fwt gmbh workholding fixtures, fwt gmbh models, fwt gmbh prices

fwt gmbh 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 permeable panel to firmly hold the workpiece in contact with the panel surface. When the coil is de-energized, the magnetic force disappears, achieving demagnetization and allowing the workpiece to be removed. Main applications include workpiece fixation 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; T-shaped screws can be screwed in for lifting during installation. The chuck is 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 the parallelism between the upper surface and the bottom surface. When holding a workpiece, sufficient positioning suction 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.

fwt gmbh workholding 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 the object and grip it firmly to enable 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 the gripper holds a workpiece, there should be certain force constraints and shape constraints to ensure that the clamped workpiece is fully released during movement, dwelling, and loading. Additionally, it should ensure that the geometric deviation of the workpiece's holding posture remains within the specified tolerance zone.

fwt gmbh workholding fixture features

Workpiece varieties for small-batch, multi-variety production already account for approximately 85% of the total number of workpiece types. Modern production requires enterprises to frequently update their product varieties to adapt to market demands and competition. However, general enterprises are still accustomed to extensively using traditional dedicated fixtures. In factories with medium production capacity, there are typically thousands to nearly ten thousand sets of dedicated fixtures. On the other hand, in enterprises with multi-variety production, approximately 50~80% of dedicated fixtures need to be updated every 3~4 years, while the actual wear of the fixtures is only about 10~20%. To meet the application of new processing technologies such as CNC machine tools, machining centers, group technology, and Flexible Manufacturing Systems (FMS), machine tool fixtures have the following characteristics: 1) They can quickly and conveniently equip new products for production, shortening the production preparation cycle and reducing production costs; 2) They can clamp a group of workpieces with similar characteristics; 3) They are high-precision machine tool fixtures suitable for precision machining; 4) They are new types of machine tool fixtures suitable for various modern manufacturing technologies; 5) They adopt efficient clamping devices powered by hydraulic stations and other sources to further reduce labor intensity and improve labor productivity; 6) They improve the standardization level of machine tool fixtures. This is mainly reflected in four aspects: standardization, precision, efficiency, and flexibility.

fwt gmbh workholding fixture applications

1) Consistently ensure workpiece machining accuracy: When clamping a workpiece with a fixture, the positional accuracy of the workpiece relative to the tool and machine tool is guaranteed by the fixture, unaffected by the worker's skill level, making the machining accuracy of a batch of workpieces consistent. 2) Reduce auxiliary time and improve labor productivity: Using fixtures for workpiece clamping is convenient and fast. Workpieces do not require marking and alignment, significantly reducing auxiliary time. Clamping workpieces in fixtures improves their rigidity, allowing for increased cutting parameters. Fixtures capable of clamping multiple workpieces or at multiple stations can be used, along with efficient clamping mechanisms, to further improve labor productivity. 3) Expand the usage range of machine tools and achieve multi-functionality: By attaching different types of fixtures according to the forming motion of the processing machine tool, the original process range of the machine tool can be expanded. For example, installing a boring jig on the carriage of a lathe or the worktable of a radial drilling machine allows for boring processing of box parts. 4) Ensure machining accuracy: Using fixture installation accurately determines the mutual position between the workpiece, machine tool, and tool. The positional accuracy of the workpiece is guaranteed by the fixture, unaffected by the worker's skill level, resulting in high and stable machining accuracy. 5) Improve productivity and reduce costs: Clamping workpieces with fixtures allows for rapid positioning and clamping without alignment, significantly reducing auxiliary time. Clamping workpieces in fixtures improves their rigidity, allowing for increased cutting parameters. Fixtures capable of clamping multiple workpieces or at multiple stations can be used, along with efficient clamping mechanisms. These factors all contribute to improved labor productivity. Additionally, using fixtures stabilizes product quality, reduces the scrap rate, allows for the assignment of workers with lower technical grades, and significantly reduces production costs. 6) Expand the process range of machine tools: Using dedicated fixtures can change the original purpose of the machine tool and expand its usage range, achieving multi-functionality. For example, after installing a boring jig fixture on a lathe or radial drilling machine, boring processing of box hole systems can be performed. Dedicated fixtures can also convert a lathe into a broaching machine, fully utilizing the capabilities of general-purpose machine tools. 7) Reduce workers' labor intensity: Clamping workpieces with fixtures is convenient and fast. When using pneumatic, hydraulic, or other clamping devices, workers' labor intensity can be reduced.

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