German HAHN+KOLB workpiece fixtures HAHN+KOLB model HAHN+KOLB price

HAHN+KOLB 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 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 datum 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 machining motion of the machine tool during processing. It typically consists of positioning elements, clamping devices, tool-setting and guiding elements or devices, etc.

HAHN+KOLB workpiece fixture types

1) Standard rectangular electromagnetic chuck Application: Rectangular table surface grinding machines. 2) High-power electromagnetic chuck Application: Milling machines, planers, machining centers. 3) Fine-pole electromagnetic chuck Application: Rectangular table surface grinding machines, milling machines. 4) Multi-functional high-power electromagnetic chuck Application: Rectangular table surface grinding machines. 5) Rotary electromagnetic chuck Application: Various surface grinding machines. 6) Electromagnetic chuck for knife grinding Application: Knife grinding machines. 7) Circular electromagnetic chuck (concentric circle type) Application: Circular table surface grinding machines. 8) Circular electromagnetic chuck (radial pole type) Application: Circular table surface grinding machines. 9) Circular electromagnetic chuck (plum blossom pole type) Application: Circular table surface grinding machines. An electromagnetic chuck is an electromagnetic fixture that secures the workpiece being processed through the suction force generated by the chuck body after the electromagnetic coil is energized. The electromagnetic chuck consists of several parts, including an iron core, coil, faceplate, and bracket. The electromagnet, composed of the coil and iron core, is the main part of the electromagnetic chuck.

HAHN+KOLB workpiece fixture classification

1) General-purpose fixtures: General-purpose fixtures are standardized fixtures that can be used to process different workpieces within a certain range. For example, three-jaw chucks and four-jaw independent chucks on lathes, vise jaws, indexing heads, and rotary tables on milling machines, etc. These fixtures are generally produced by specialized factories and are often supplied to users as machine tool accessories. Their characteristics include wide adaptability and low production efficiency, making them mainly suitable for single-piece and small-batch production. 2) Special-purpose fixtures: Special-purpose fixtures are fixtures specifically designed for a particular operation on a specific workpiece. Their characteristics include 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. 3) General-purpose adjustable fixtures and group fixtures: Their characteristic is that some components of the fixture can be replaced and some devices can be adjusted to accommodate the processing of different parts. Fixtures used for group processing of similar parts are called group fixtures. Compared with group fixtures, general-purpose adjustable fixtures have less clearly defined processing objects and a wider scope of application. 4) Modular fixtures: Modular fixtures are fixtures assembled from a set of pre-manufactured standard components and parts according to the processing requirements of the part. Manufactured by professional manufacturers, their characteristics include flexibility, strong versatility, short manufacturing cycle, and reusability of components, making them particularly suitable for trial production of new products and single-piece/small-batch production. 5) Pallet fixtures: Pallet fixtures are fixtures used on automated lines. This type of fixture not only serves to clamp the workpiece but also moves as one unit with the workpiece along the automated line from one station to the next for processing of different operations.

HAHN+KOLB workpiece fixture applications

1) Can stably ensure the machining accuracy of the workpiece: When clamping a workpiece with a fixture, the positional accuracy of the workpiece relative to the cutting 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) Can reduce auxiliary time and improve labor productivity: Using fixtures to clamp workpieces is convenient and fast; workpieces do not require scribing and alignment, significantly reducing auxiliary time; clamping workpieces in fixtures increases workpiece rigidity, allowing for increased cutting parameters; fixtures capable of clamping multiple workpieces or at multiple stations can be used, and high-efficiency clamping mechanisms can be adopted to further improve labor productivity. 3) Can expand the usage range of machine tools and achieve multi-functionality: Based on the forming motion of the processing machine tool, attaching different types of fixtures can expand the original technological range of the machine tool. For example, installing a boring template on the carriage of a lathe or the worktable of a radial drilling machine allows for boring processing of box-type parts. 4) Ensure machining accuracy: Using fixtures for installation can accurately determine the mutual position between the workpiece, machine tool, and cutting 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 with fixtures increases workpiece rigidity, allowing for increased cutting parameters; fixtures capable of clamping multiple workpieces or at multiple stations can be used, and high-efficiency clamping mechanisms can be adopted. These factors all contribute to improving labor productivity. In addition, using fixtures stabilizes product quality, reduces scrap rates, allows for the assignment of workers with lower technical grades, and significantly reduces production costs. 6) Expand the technological range of machine tools: Using special-purpose fixtures can change the original purpose of the machine tool and expand its usage range, achieving multi-functionality. For example, after installing boring template fixtures on lathes or radial drilling machines, boring processing of hole systems in box-type parts can be performed; special-purpose fixtures can also convert lathes into broaching machines to fully utilize the capabilities of general-purpose machine tools. 7) Reduce workers' labor intensity: Clamping workpieces with fixtures is convenient and fast. When pneumatic, hydraulic, or other clamping devices are used, workers' labor intensity can be reduced.

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