German alberg workpiece fixtures alberg model alberg price

alberg 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 because it can no longer be used. 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 usually consists of positioning elements, clamping devices, tool-setting and guiding elements or devices, etc.

alberg workpiece fixture structure

1) Positioning elements: They contact 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. 2) Clamping device: Used to clamp the workpiece, keeping the workpiece in its established position in the fixture during cutting. As shown in Figure 6-1, nut 5 and open washer. 3) Tool-setting and guiding elements or devices: The function of these elements is to ensure the correct position between the workpiece and the cutting tool. Elements used to determine the correct position of the cutting tool before machining are called tool-setting elements, such as tool-setting blocks. Elements used to determine the tool position and guide the tool during machining are called guiding elements. 4) Connecting elements: Elements that connect the fixture to the machine tool, ensuring the mutual positional relationship between the machine tool and the fixture. 5) Fixture body: A base component used to connect or fix various elements and devices on the fixture, making them an integrated whole. It connects and aligns with relevant parts of the machine tool, giving the fixture a definite position relative to the machine tool. 6) Other elements and devices: Some fixtures require indexing mechanisms according to the machining requirements of the workpiece; milling machine fixtures also require positioning keys, etc. Not all of these components are indispensable for every type of machine tool fixture, but any fixture must have positioning elements and clamping devices. They are key to ensuring the machining accuracy of the workpiece, with the aim of accurately positioning and firmly clamping the workpiece.

alberg workpiece fixture classification

1) General-purpose fixtures: General-purpose fixtures refer to standardized fixtures that can be used to machine different workpieces within a certain range. For example, three-jaw chucks and four-jaw independent chucks on lathes, parallel vises, dividing 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 are wide adaptability and low production efficiency, mainly suitable for single-piece and small-batch production. 2) Special-purpose fixtures: Special-purpose fixtures 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 because it can no longer be used. 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 elements of the fixture can be replaced and some devices can be adjusted to accommodate the machining of different parts. Fixtures used for group machining of similar parts are called group fixtures. Compared with group fixtures, general-purpose adjustable fixtures have less clearly defined machining objects and a wider scope of application. 4) Modular fixtures: Modular fixtures refer to fixtures assembled from a set of pre-manufactured standard elements and components according to the machining requirements of the part. Manufactured by professional manufacturers, their characteristics are flexibility, strong versatility, short manufacturing cycle, and reusable elements, making them particularly suitable for trial production of new products and single-piece/small-batch production. 5) Pallet fixtures: Pallet fixtures are a type of fixture 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 different operations.

alberg workpiece fixture applications

1) Can stably ensure the machining accuracy of the workpiece: When clamping workpieces with fixtures, 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 need scribing and alignment, significantly reducing auxiliary time; clamping workpieces in fixtures increases their 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, further improving labor productivity. 3) Can expand the usage range of machine tools, achieving multi-functionality: By attaching different types of fixtures according to the forming motion of the machining machine tool, the original process range of the machine tool can be expanded. For example, installing boring jigs on the carriage of a lathe or the table of a radial drilling machine allows for boring operations on box-type parts. 4) Ensure machining accuracy: Installation using fixtures can accurately determine the mutual positions 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 their rigidity, allowing for increased cutting parameters; fixtures for clamping multiple workpieces or at multiple stations can be used, and high-efficiency clamping mechanisms can be adopted. These factors are all conducive to improving labor productivity. In addition, after adopting fixtures, product quality is stable, scrap rates decrease, workers with lower technical grades can be assigned, significantly reducing production costs. 6) Expand the process 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 jig fixtures on lathes or radial drilling machines, boring operations can be performed on hole systems of box-type parts; through special-purpose fixtures, lathes can also be converted for broaching use, fully leveraging 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 adopted, workers' labor intensity can be reduced.

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