German zimm workholding fixtures zimm model zimm price

zimm workholding 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 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.

zimm workholding fixture introduction

Vacuum suction cups are one of the actuators for vacuum equipment. The suction cup material is made of nitrile rubber, which has high tensile strength, and is therefore widely used in various vacuum holding equipment, such as in construction, paper industry, printing, glass, and other industries, to perform tasks of holding and transporting thin and light items such as glass and paper. Vacuum suction cups are also known as vacuum lifters and vacuum nozzles. Generally speaking, using vacuum suction cups to grab products is the most economical method. There is a wide variety of vacuum suction cups; rubber suction cups can operate at high temperatures; silicone rubber suction cups are very suitable for gripping products with rough surfaces; polyurethane suction cups are highly durable. In addition, in actual production, if oil resistance is required for the suction cup, materials such as polyurethane, nitrile rubber, or vinyl-containing polymers can be considered for manufacturing the suction cup. Typically, to avoid scratching the surface of the product, it is best to choose suction cups with bellows made of nitrile rubber or silicone rubber.

zimm workholding fixture features

1) Standardization: Standardization and generalization of machine tool fixtures are two interrelated aspects. China already has national standards for fixture parts and components: GB/T2148~T2259－91, as well as standards for various general-purpose fixtures, modular fixtures, etc. Standardization of machine tool fixtures facilitates commercial production of fixtures, helps shorten production preparation cycles, and reduces total production costs. 2) Precision: As the precision of mechanical products continues to improve, the precision requirements for fixtures inevitably increase accordingly. There are many structural types of precision fixtures, for example, multi-tooth discs for precision indexing, with an indexing accuracy of ±0.1"; high-precision three-jaw self-centering chucks for precision turning, with a centering accuracy of 5μm. 3) High Efficiency: High-efficiency fixtures are mainly used to reduce the basic time and auxiliary time of workpiece machining, to improve labor productivity, and to reduce workers' labor intensity. Common high-efficiency fixtures include automated fixtures, high-speed fixtures, and fixtures with clamping force devices. For example, using electric vises on milling machines to clamp workpieces can improve efficiency by approximately 5 times; using high-speed three-jaw self-centering chucks on lathes ensures that the jaws can still firmly clamp the workpiece under test speeds of 9000r/min, thereby significantly increasing cutting speed. In addition to configuring corresponding high-efficiency and automated fixtures in production lines and automatic lines, various fixtures for automatic workpiece clamping and devices for automatic fixture changing have appeared on CNC machine tools, especially on machining centers, fully leveraging the efficiency of CNC machine tools. 4) Flexibility: The flexibility of machine tool fixtures is similar to that of machine tools. It refers to the ability of machine tool fixtures to adapt to variable process factors through adjustment, combination, and other methods. The main variable process factors include: operation characteristics, production batch size, workpiece shape and dimensions, etc. New types of fixtures with flexibility characteristics mainly include: modular fixtures, general-purpose adjustable fixtures, group fixtures, modular fixtures, and CNC fixtures. To meet the needs of modern mechanical industry for multi-variety, small and medium batch production, expanding the degree of flexibility of fixtures, changing the non-detachable structure of special-purpose fixtures to detachable structures, and developing adjustable fixture structures will be the main direction of current fixture development.

zimm workholding 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 arbitrarily, 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 square boxes, L type square boxes, support angle irons, angular connection blocks, angle gauges, frame support bases, etc.; used for height positioning or platform expansion, and for positioning or clamping other accessories. These are components that position support pieces on the platform to ensure the workpiece meets certain height requirements during machining, such as shims, spacer plates, support plates, support blocks, and extension plates, mainly used for support at different heights. 3) Positioning components: Including positioning squares, positioning straight edges, planar angle squares, V type positioning components, eccentric circle stops, used for accurately adjusting positioning location or height. These are components that precisely position 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, 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 ensure the workpiece does not shift during machining. 6) Locking components: Including: quick-locking pins, countersunk quick-locking pins, countersunk locking pins, handle quick-locking pins, locating pins, magnetic connection locking pins, hex socket locking pins, hex head locking pins, magnetic pins; Purpose: Components used for positioning and locking between components. 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 bases, hydraulic lifting support bases, support rails; Purpose: Components acting on the connection or support between 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 carts; Purpose: Auxiliary components for assembling tooling elements. 9) Assembly tools: Including hex keys, oil stones, magnetic pliers, and other assembly tools.

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