German ritter workpiece fixtures ritter model ritter price

ritter workpiece 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 because it can no longer be used. It is only suitable for production with fixed products and large batch sizes. It contacts the positioning datum 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.

ritter workpiece fixture structure

1) Positioning elements: They contact the positioning datum 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. 2) Clamping device: Used to clamp the workpiece, keeping the workpiece in its established position within the fixture during cutting. As shown in Figure 6-1, the nut 5 and open washer. 3) Tool-setting and guiding elements or devices: The function of these elements is to ensure the correct position between the workpiece and the cutting tool. Elements used to determine the correct position of the cutting tool before machining are called tool-setting elements, such as tool-setting blocks. Elements used to determine the tool position and guide the tool during machining are called guiding elements. 4) Connecting elements: Elements that connect the fixture to the machine tool, ensuring the mutual positional relationship between the machine tool and the fixture. 5) Fixture body: The base component used to connect or fix various elements and devices on the fixture into a single unit. It connects and aligns with relevant parts of the machine tool, giving the fixture a definite position relative to the machine tool. 6) Other elements and devices: Some fixtures require indexing mechanisms according to the machining requirements of the workpiece; milling machine fixtures also require locating keys, etc. Not all of these components are indispensable for every type of machine tool fixture, but any fixture must have positioning elements and a clamping device. They are key to ensuring the machining accuracy of the workpiece, with the aim of accurately positioning and securely clamping the workpiece.

ritter workpiece fixture classification

1) General-purpose fixtures: General-purpose fixtures refer to standardized fixtures that can be used to process different workpieces within a certain range. For example, three-jaw chucks and four-jaw independent chucks on lathes, and vise jaws, dividing 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. Their characteristics are wide adaptability and low production efficiency, mainly suitable for single-piece and small-batch production. 2) Special-purpose fixtures: Special-purpose fixtures 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 because it can no longer be used. It is only suitable for production with fixed products and large batch sizes. 3) Universal adjustable fixtures and group fixtures: Their characteristic is that some elements 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 with group fixtures, universal adjustable fixtures have less clearly defined machining objects and a wider scope of application. 4) Modular fixtures: Modular fixtures refer to fixtures assembled from a set of pre-manufactured standard elements and components according to the machining requirements of the part. Manufactured by professional manufacturers, their characteristics are flexibility, strong versatility, short manufacturing cycle, and reusability of elements, making them particularly suitable for trial production of new products and single-piece or small-batch production. 5) Pallet fixtures: Pallet fixtures are a type of fixture used on automated lines. This type of fixture not only serves to clamp the workpiece but also moves as an integrated unit with the workpiece along the automated line from one station to the next for processing different operations.

ritter workpiece fixture selection

When selecting pneumatic grippers and jaw designs, these are the main factors to consider: 1) Part shape, orientation, and dimensional variations: If the object has two opposing flat surfaces, a double-jaw parallel gripper can be used, which resolves dimensional deviation issues. For cylindrical objects, double-jaw grippers can also be used for clamping. Note that retaining or encompassing clamping requires less force. 2) Part weight: The clamping force must be sufficient to hold the object securely while performing the required operations on it. The type of jaw design must be considered when calculating the required clamping force. Please note that safety factors should be taken into account when selecting the required force, and air pressure is also a factor to consider. 3) Accessibility: This relates both to the operation being performed and to the spatial constraints of the gripper jaws. If external operations are to be performed on the object, internal clamping is required. Scissor-type grippers are usually lower in price but require more space for jaw movement. 4) Environment: Grippers used in harsh environments or cleanrooms require corresponding designs. 5) Object retention: When air pressure is no longer supplied, the gripper will release its hold on the object, causing it to drop. For such applications, spring-assisted grippers can be used.

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