German NANN workpiece fixtures NANN model NANN price

NANN workpiece fixtures are devices used in the manufacturing process to secure the workpiece in the correct position for machining or inspection, also known as clamps. Broadly speaking, any device used to quickly, conveniently, and safely install a workpiece during any step of the process can be called a fixture. Fixtures typically consist of locating elements (to determine the correct position of the workpiece in the fixture), clamping devices, tool-setting guide elements (to determine the relative position of the tool and workpiece or guide the tool direction), indexing devices (to allow the workpiece to undergo machining at several stations in a single setup, including rotary indexing devices and linear indexing devices), connecting elements, and the fixture body (fixture base). Examples include welding fixtures, inspection fixtures, assembly fixtures, and machine tool fixtures, among which machine tool fixtures are the most common and are often simply referred to as fixtures. When machining a workpiece on a machine tool, to ensure that the surface of the workpiece meets the technical requirements specified in the drawing, such as dimensions, geometric shape, and mutual positional accuracy with other surfaces, the workpiece must be properly located (positioning) and securely clamped (clamping) before machining.

NANN Workpiece Fixture Classification

Fixtures can be classified by usage characteristics into: (1) Universal general-purpose fixtures. Such as machine vises, chucks, suction cups, dividing heads, and rotary tables, which have high versatility and can adapt well to changes in machining processes and workpieces. Their structures are standardized, and their sizes and specifications are serialized, with most becoming standard accessories for machine tools. (2) Special-purpose fixtures. Designed and manufactured specifically for the clamping needs of a certain product part in a specific process, with a single service object and strong specificity, generally designed by the product manufacturer. Common types include lathe fixtures, milling fixtures, drill jigs (machine tool fixtures used to guide tools for drilling or reaming holes in workpieces), boring jigs (machine tool fixtures used to guide boring bars for boring holes in workpieces), and pallet fixtures (movable fixtures used on automated lines of modular machine tools). (3) Adjustable fixtures. Special-purpose fixtures whose elements can be replaced or adjusted. (4) Modular fixtures. Fixtures composed of standardized elements of different shapes, specifications, and uses, suitable for new product prototyping, single-piece and small-batch production with frequent product changes, and temporary tasks. In addition to vises, chucks, dividing heads, and rotary tables, there is a more common type called the tool holder. Generally speaking, when the term tool fixture appears, it mostly refers to the tool holder.

NANN Workpiece Fixture Features

1) Suction cup holding force: Electrically controlled powerful suction cups have extremely strong holding force, up to 16kg/cm², with uniform and adjustable magnetic distribution, suitable for various heavy-duty machining, rough machining, and finish machining; ordinary powerful suction cups have weaker and uneven holding force, unable to meet the requirements of heavy-duty machining operations. 2) Machining precision: The holding force of electrically controlled powerful suction cups does not require a continuous power supply to maintain, generating no heat during continuous operation, avoiding thermal deformation of the workpiece. Meanwhile, the strong and uniform surface suction ensures the highest machining precision even if the workpiece extends beyond the table surface; whereas ordinary electromagnetic suction cups require a continuous current supply, generating heat after a period of operation, which not only causes thermal deformation of the workpiece but also reduces the magnetic force of the suction cup, failing to guarantee machining precision. 3) Performance: Electrically controlled powerful suction cups can be used continuously, even for more than 20 hours a day, without any failures or need for maintenance; ordinary permanent magnet suction cups show a decline in holding force after about half a year of use, while electromagnetic suction cups can only operate for a few hours a day, and the equipment is prone to failure, requiring frequent replacement and repair of internal components. 4) Operational efficiency: Using ordinary powerful suction cups requires significant time for workpiece adjustment, accounting for 40%-50% of the entire machining process, and clamping positioning is prone to obvious errors, resulting in a high scrap rate and very low efficiency; electrically controlled powerful suction cups have an automatic auxiliary positioning function, completing workpiece clamping or release in just 0.3 seconds with the simple press of a button, greatly improving production efficiency.

NANN Workpiece Fixture Usage

With the continuous development of China's industry, electromagnetic chucks are increasingly widely used in industrial production. The most important aspect of an electromagnetic chuck is its parameters; among the performance parameters, the lifting capacity and its working class are the most critical. The so-called lifting capacity of an electromagnetic chuck refers to the maximum weight of the load allowed to be lifted under specified operating conditions, also known as the rated lifting capacity. Generally, for cranes equipped with an electromagnetic chuck, the lifting capacity should also include the weight of the electromagnetic chuck itself. Rectangular electromagnetic chucks have lifting threaded holes on both sides. During installation, T-shaped screws can be screwed in for lifting. 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 the parallelism between the upper surface and the bottom surface. When adsorbing workpieces, sufficient positioning holding force can be 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. Before use, the surface of the electromagnetic chuck should be wiped clean to avoid scratches. Severe impacts are prohibited to prevent affecting accuracy. After use, it should be cleaned and coated with anti-rust oil to prevent corrosion. When using the electromagnetic chuck independently, a ground wire must be connected to prevent electric shock due to leakage.

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