German bessey workpiece fixtures bessey models bessey prices

bessey workpiece fixtures are devices used in the manufacturing process to secure the workpiece in the correct position for machining or inspection, also known as jigs. 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 to the workpiece or guide the tool direction), indexing devices (enabling the workpiece to undergo machining at several stations in a single setup, including rotary indexing devices and linear indexing devices), connecting elements, and fixture bodies (fixture bases). 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.

bessey workpiece fixture requirements

Whether gripper-type or suction-type, the robot end-effector must also have the repeatability required for the task. The structure of the robot end-effector should be as simple and compact as possible, and lightweight, to reduce the load on the arm. Dedicated robot end-effectors have a simpler structure than general-purpose ones, offer high work efficiency, and can perform various tasks. In contrast, "universal" end-effectors may have disadvantages such as complex structures and high costs. Therefore, it is recommended to design and use serialized, standardized, dedicated robot end-effectors that can be quickly changed. If an object has two opposing flat surfaces, a double-jaw parallel gripper can be used to address dimensional deviation issues. For cylindrical objects, double-jaw grippers can also be used for clamping. Note that retaining or encompassing clamping requires less force.

bessey workpiece fixture classification

1) General-purpose fixtures: General-purpose fixtures are standardized fixtures that can be used to machine different workpieces within a certain range. Examples include three-jaw chucks and four-jaw independent chucks on lathes, and vises, indexing heads, and rotary tables on milling machines. These fixtures are generally produced by specialized factories and are often supplied to users as machine tool accessories. They are characterized by wide adaptability and low production efficiency, making them mainly suitable for single-piece and small-batch production. 2) Dedicated fixtures: Dedicated fixtures are specifically designed for a particular operation on a specific workpiece. They are characterized by compact structures, rapid, convenient, and labor-saving operation, and can ensure high machining precision 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. They are only suitable for production with fixed products and large batches. 3) Universal adjustable fixtures and group fixtures: Their characteristic is that some components of the fixture can be replaced and some devices adjusted to accommodate the machining of different parts. Fixtures used for group machining of similar parts are called group fixtures. Compared with group fixtures, universal adjustable fixtures have less clearly defined machining objects and a wider scope of application. 4) Modular fixtures: Modular fixtures are assembled from a set of pre-manufactured standard components and parts according to the machining requirements of the part. Manufactured by professional manufacturers, they are characterized by flexibility, strong versatility, short manufacturing cycles, and reusable components, making them particularly suitable for new product prototyping and single-piece/small-batch production. 5) Pallet fixtures: Pallet fixtures are 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 machining operations.

bessey workpiece fixture classification

1) Base components: Such as square, rectangular, and circular base plates, used as fixture tooling tables. All five working faces of the table feature grid-marked holes. The flatness, parallelism, and perpendicularity tolerances of these five faces, as well as the positional accuracy of the holes, are very high, ensuring sufficient accuracy for positioning on the table surface and for combining the table with other modules. The dimensions of the base table can be chosen freely, and special sizes can be custom-made. If high precision is required after combining tables, guide rails can be used to connect them. 2) Support components: Including U-type angle cubes, L-type angle cubes, support angle irons, angular connection blocks, angle gauges, frame support seats, etc.; used for height positioning or platform expansion, and for positioning or clamping other accessories. Components such as shims, spacer plates, support plates, support blocks, and extension plates are positioned on the platform to ensure the workpiece reaches a certain height requirement during machining, primarily serving as supports at different heights. 3) Locating components: Including locating squares, locating straight edges, planar squares, V-type locating components, and eccentric circle stops; used to accurately adjust positioning location or height. These are components that precisely locate the workpiece to ensure it meets certain dimensional accuracy requirements during machining; used to determine the relative positions between components and between components and the workpiece. 4) Adjustment components: Including height adjusters and adjustment shims; Purpose: Components used to adjust positional differences and gaps between components and the workpiece. 5) Clamping components: Including: 90° spiral clamps, horizontal spiral clamps, 45° spiral clamps, vertical quick-action clamps, horizontal push-type quick-action clamps; Purpose: Components used to clamp the workpiece onto the platform or base elements to prevent displacement during machining. 6) Locking components: Including: quick-locking pins, countersunk quick-locking pins, countersunk locking pins, handle quick-locking pins, locating pins, connection lock magnetic pins, hex socket locking pins, hex head locking pins, magnetic pins; Purpose: Components used for positioning and locking between elements. 7) Assembly components: Including: 90-degree clamping corner sleeves, 45-degree clamping corner sleeves, parallel clamping corner sleeves, vertical clamping corner sleeves, standard support legs, swivel caster support legs with brakes, fixed support legs, frame-structure support seats, hydraulic lifting support seats, support rails; Purpose: Components acting to connect or support elements and other parts. 8) Other components: Including: retaining rings, grounding devices, spiral clamps, pipe clamps, lifting rings, cross-slot pressure pads, two-point clamping bridges, three-point clamping bridges, multi-purpose support templates, platform protective plates, tool trolleys; Purpose: Auxiliary components supporting the assembly of tooling elements. 9) Assembly tools: Including hex keys, oil stones, magnetic pliers, and other assembly tools.

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