German karg workpiece fixtures karg model karg price

karg workpiece fixtures are devices used on machine tools to clamp workpieces and guide cutting tools. They refer to fixtures specifically designed for a particular operation on a specific workpiece. Their characteristics include a compact structure, rapid, convenient, and labor-saving operation, ensuring high machining accuracy and production efficiency. However, the design and manufacturing cycle is long, and manufacturing costs are high. When the product changes, the fixture becomes obsolete and is scrapped due to inability to reuse. It is only suitable for production with fixed products and large batch sizes. It contacts the positioning reference of the workpiece to determine the correct position of the workpiece in the fixture, thereby ensuring the correct relative position of the workpiece with respect to the cutting tool and the machine tool's machining motion during processing. It typically consists of positioning elements, clamping devices, tool-setting and guiding elements or devices, etc.

karg workpiece fixture classification

Fixture types can be classified by usage characteristics as follows: (1) Universal general-purpose fixtures. Such as machine vises, chucks, suction cups, indexing heads, and rotary tables, which have great versatility and can adapt well to changes in machining operations and workpieces. Their structures are standardized, and dimensions and specifications are serialized, with most becoming standard accessories for machine tools. (2) Dedicated fixtures. Specifically designed and manufactured for the clamping needs of a certain product part in a specific operation, serving a single purpose with strong specificity, generally designed by the product manufacturer. Common types include lathe fixtures, milling fixtures, drill jigs (machine tools used to guide drills or reamers on workpieces), boring jigs (machine tools used to guide boring bars on workpieces), and pallet fixtures (movable fixtures used on automated lines of modular machine tools). (3) Adjustable fixtures. Dedicated fixtures with replaceable or adjustable elements. (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, indexing 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.

karg workpiece fixture features

Workpiece varieties in 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 meet market demands and competition. However, general enterprises are still accustomed to extensively using traditional dedicated fixtures. In factories with medium production capacity, there are usually 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 machining technologies such as CNC machine tools, machining centers, group technology, and Flexible Manufacturing Systems (FMS), machine tool fixtures have the following characteristics: 1) Can quickly and conveniently equip new products for production, shortening the production preparation cycle and reducing production costs; 2) Can clamp a group of workpieces with similar characteristics; 3) Suitable for high-precision machine tool fixtures for precision machining; 4) Suitable for new types of machine tool fixtures for various modern manufacturing technologies; 5) Adopt efficient clamping devices powered by hydraulic stations, etc., to further reduce labor intensity and improve labor productivity; 6) Improve the standardization level of machine tool fixtures. This is mainly manifested in four aspects: standardization, precision, efficiency, and flexibility.

karg workpiece fixture maintenance

1) Check before use whether the limit dimensions are still 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, it can be reassembled, shifting the worn areas to continue 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 accuracy, wear, and seizing, so correct lubrication is essential. After machining, 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 opening the main jaws to the 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 a thorough cleaning every six months (at least every two months when machining cast iron or copper parts). Check parts for damage or wear, and replace with new ones immediately if severe. Lubricate thoroughly before assembly.

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