lissmac maschinenbau fixtures, German lissmac maschinenbau models, lissmac maschinenbau prices

lissmac maschinenbau 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 workpiece's locating datum 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 locating elements, clamping devices, tool-setting and guiding elements or devices, etc.

lissmac maschinenbau fixture structure

The cross-sectional shape and distribution of the pole cores vary depending on the workpiece. Common structures of electromagnetic chucks include rectangular and circular types. Rectangular magnetic poles are arranged either longitudinally or transversely. Longitudinal arrangement of rectangular magnetic poles is suitable for clamping larger workpieces; transverse arrangement is suitable for clamping smaller workpieces. Circular chucks are suitable for clamping ring-shaped workpieces or workpieces with complex shapes. The main characteristics of standard electromagnetic chucks are: magnetic flux lines are evenly distributed on the chuck surface, magnetic attraction cannot be concentrated, and the magnetic force per unit area is relatively small; the direction of magnetic force is perpendicular to the chuck surface and difficult to change, producing only one type of magnetic force for workpieces with the same contact area; the point of action of the magnetic force on the workpiece is limited to the contact surface between the workpiece and the chuck and cannot be arbitrarily changed. Therefore, disadvantages during machining include low positioning accuracy, insufficient clamping force, narrow scope of application, and lower production efficiency.

lissmac maschinenbau fixture operation

1) Assemble the two engine bushings onto the 1 strut according to the "Strut Welding Assembly" drawing, and place them on the fixture body, position the 1 strut using stop pins and stop plates, clamp the 1 strut with a screw clamp; simultaneously position the two 4 engine bushings with pins, and clamp them with quick-release screw clamping devices; 2) After tack welding, release the quick-release screw clamping devices, pull out the pins, remove for welding; 3) Place the welded assembly back on the fixture body, position the welded assembly using stop pins and stop plates, clamp the welded assembly with screw clamps; then place the assembly of the M6 nut and horn bracket onto the welded assembly, position it using the tapered locating pins on the screw clamping mechanism and the slots in the pressure plates of the screw clamping mechanism, and clamp it with the screw clamping mechanism; 4) Perform three-sided welding on the assembly of the M6 nut and horn bracket and the strut, then release all screw clamps, the pressure plates of the screw clamping mechanism clamping the M6 nut and horn bracket assembly are lifted by springs, the tapered locating pins on them disengage from the welded assembly accordingly, then push out the pressure plates to disengage one end from the studs of the screw clamping mechanism, rotate the pressure plates to the side of the welded assembly, then remove the welded assembly.

lissmac maschinenbau 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 have 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 and for combination with other modules. The dimensions of the base table can be chosen arbitrarily, and special sizes can be custom-made. If high accuracy is required after combining tables, guide rails can be used to connect them. 2) Supporting components: including U type square boxes, L type square boxes, support angle irons, angle 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 ensure the workpiece reaches a certain height requirement during processing, such as shims, spacer plates, support plates, support blocks, and extension plates, which are positioned on the platform and mainly used for support at different heights. 3) Locating components: including locating squares, locating straight edges, planar squares, V type locators, eccentric circle stops, used for accurately adjusting positioning location or height. These are components that precisely locate the workpiece to ensure it meets certain dimensional accuracy requirements during processing; used to determine the relative positions between components and between components and workpieces. 4) Adjusting components: including height adjusters and adjustment shims; purpose: components used to adjust positional differences and gaps between components and workpieces. 5) Clamping components: including: 90° spiral clamps, horizontal spiral clamps, 45° spiral clamps, vertical push-type quick clamps, horizontal push-type quick clamps; purpose: components used to clamp the workpiece onto the platform or base elements to ensure it does not shift during processing. 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, external hex locking pins, magnetic pins; purpose: components used for positioning and locking between components. 7) Assembly components: including: 90 degree clamping angle sleeves, 45 degree clamping angle sleeves, parallel clamping angle sleeves, vertical clamping angle 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 protection plates, tool trolleys; 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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