German Rose+Krieger workpiece fixtures Rose+Krieger model Rose+Krieger price

Rose+Krieger workpiece fixtures refer to devices used in the manufacturing process to secure the workpiece in the correct position for machining or inspection, also known as jigs. In a broad sense, any device used to quickly, conveniently, and safely install workpieces during any stage 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 and workpiece or guide the tool direction), indexing devices (to allow 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 workpieces on machine tools, to ensure that the surface of the workpiece meets the technical requirements specified in the drawings, such as dimensions, geometric shapes, and mutual positional accuracy with other surfaces, the workpiece must be properly located (positioned) and securely clamped (clamped) before machining.

Rose+Krieger 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.

Rose+Krieger 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. For example, three-jaw chucks and four-jaw independent chucks on lathes, vises, indexing heads, and rotary tables on milling machines. These fixtures are generally produced by specialized factories and are often provided to users as machine tool accessories. Their characteristics include wide adaptability and low production efficiency, making them mainly suitable for single-piece and small-batch production. 2) Special-purpose fixtures: Special-purpose fixtures are designed specifically for a particular operation on a specific workpiece. Their characteristics include compact structure, rapid, convenient, and labor-saving operation, ensuring 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 can be adjusted to accommodate the machining of different parts. Fixtures used for group machining of similar parts are called group fixtures. Compared to 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, their characteristics include 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. These fixtures not only serve to clamp the workpiece but also move as one unit with the workpiece along the automated line from one station to the next for different machining operations.

Rose+Krieger workpiece fixture maintenance

When using vacuum suction cups (without clamps), note that the manipulator's movement speed should not be too high, otherwise shear forces will be generated on the suction cup, causing the product to easily fall off during rapid twisting. In some cases, a clamp can be used to ensure safe transport of the product. Considering the possibility of the product sticking to the mold, an air clamp is usually installed to solve this problem. If the product's surface area is too small or the product is too heavy to use vacuum suction cups, clamps can also be used to solve this problem. If the product has strict appearance requirements, the clamped area cannot be the outer surface. To solve this problem, a sensor circuit can be installed. After confirming that the clamp or suction cup has securely grasped the product, the sensor sends a signal to the manipulator to proceed to the next operation. In cases where the manipulator's motion capability is limited and manual twisting or prying is required to demold the product or remove it from the molding area, a special cylinder capable of independent movement without relying on the manipulator can be added to improve this situation.

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