German rhenus workpiece fixtures rhenus model rhenus price

rhenus workpiece fixtures are devices used in the manufacturing process to secure the workpiece in the correct position for machining or inspection, also known as clamps. 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 within 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 the fixture body (fixture base). 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 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.

rhenus workpiece fixture operating principle

The most widely used grippers are pneumatic grippers; they are essentially cylinders powered by compressed air. When air is supplied, the gripper jaws approach and firmly grasp the object to perform other operations, and when the air direction is reversed, the gripper releases the object. Typical applications include changing the orientation of an object or moving it during pick-and-place operations. When the gripper holds a workpiece, there must be certain force constraints and form constraints to ensure that the clamped workpiece is fully released during movement, dwelling, and loading. In addition, it must ensure that the geometric deviation of the workpiece holding posture remains within the specified tolerance zone.

rhenus workpiece fixture features

Mechanical grippers commonly use compressed air as the power source, achieving finger motion through a transmission mechanism. Based on the different motion trajectories of the fingers when clamping the workpiece, mechanical grippers are classified into: 1) Arc opening/closing type, where under the drive of the transmission mechanism, the trajectory of the finger tips is an arc. This type of gripper has strict requirements on the dimensions of the clamped part of the workpiece; otherwise, it may cause abnormal workpiece status. 2) Arc parallel opening/closing type, where the two fingers of this gripper move in parallel opening and closing motions during operation, while the trajectory of the finger tips is an arc. The illustrated gripper uses a parallelogram transmission mechanism to drive the parallel opening and closing of the fingers in two scenarios. 3) Linear parallel opening/closing type. The motion trajectory of the two fingers of this gripper is linear, and the clamping surfaces of the two fingers always remain parallel. A cam mechanism is used to achieve the parallel opening and closing of the two fingers. Inclined cam slots are machined on the sliding blocks of each finger. When the piston rod moves up and down, the rollers mounted at its end move within the cam slots, achieving parallel clamping motion of the fingers. Using a rack and pinion mechanism, when the rack at the end of the piston rod drives the gear to rotate, the racks on the fingers move linearly, thereby causing the two fingers to open and close in parallel to clamp the workpiece.

rhenus 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 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-style support bases, etc.; used for height positioning or platform expansion, as well as for positioning or clamping other accessories. These are components used to position support elements such as shims, spacer plates, support plates, support blocks, and extension plates on the platform to ensure the workpiece meets certain height requirements during machining, primarily serving as supports at different heights. 3) Locating components: including locating squares, locating straight edges, planar angle squares, V-type locating components, and eccentric circle stops, used to accurately adjust positioning location or height. These are components used to precisely locate the workpiece to ensure it meets certain dimensional accuracy requirements during machining; they 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, magnetic connection locking pins, hex socket locking pins, external hex locking pins, magnetic pins; purpose: components used for positioning and locking between elements. 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 lift support bases, support rails; purpose: components acting as connections or supports between elements and other parts. 8) Other components: including: retaining rings, grounding devices, spiral clamps, pipe clamps, lifting eyes, 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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