Germany Franz Miederhoff OHG workpiece fixtures Franz Miederhoff OHG model Franz Miederhoff OHG price

Franz Miederhoff OHG workpiece fixtures use hydraulic components to replace mechanical parts, achieving automatic positioning, support, and clamping of workpieces through hydraulic control. They offer advantages such as high clamping force, reliable clamping, smooth operation, and ease of use, and are currently widely used in scenarios such as CNC machine tools, machining centers, and automated production lines. By assembling the selected hydraulic components with the designed mechanical parts, the required fixture can be obtained. Hydraulic fixtures ensure accurate positioning and secure clamping of workpieces at specified positions, and can reduce vibration and deformation during machining through floating supports. They can also utilize automatic control to press down and lift pressure plates to clear clamping positions during machining. Hydraulic fixtures can withstand large cutting forces during rough machining, ensure accurate positioning during precision machining, and perform support, clamping, and quick release tasks that manual fixtures cannot accomplish.

Franz Miederhoff OHG workpiece 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 devices, 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 lifting devices and vacuum nozzles. Generally speaking, using vacuum suction cups to grab products is the most economical method. There are various types of vacuum suction cups; rubber suction cups can operate at high temperatures, silicone rubber suction cups are very suitable for grabbing products with rough surfaces, and polyurethane suction cups are highly durable. In addition, in actual production, if oil resistance is required for the suction cups, materials such as polyurethane, nitrile rubber, or vinyl-containing polymers can be considered for manufacturing the suction cups. 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.

Franz Miederhoff OHG 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, 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 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 certain process of a specific workpiece. Their characteristics are compact structure, rapid, convenient, and labor-saving operation, ensuring high machining accuracy and production efficiency, but the design and manufacturing cycle is long and manufacturing costs are high. When the product changes, the fixture will be scrapped because it can no longer be used. It is 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 adapt to the processing of different parts. Fixtures used for group processing of similar parts are called group fixtures. Compared with group fixtures, universal adjustable fixtures have less defined processing objects and a wider scope of application. 4) Modular fixtures: Modular fixtures refer to fixtures assembled from a set of pre-manufactured standard components and parts according to the processing requirements of the part. Manufactured by professional manufacturers, their characteristics are flexibility, strong versatility, short manufacturing cycle, and reusable components, making them particularly suitable for trial production of new products and single-piece small-batch production. 5) Pallet fixtures: Pallet fixtures are a type of fixture used on automated lines. This fixture not only serves to clamp the workpiece but also becomes integrated with the workpiece, moving from one station to the next along the automated line for processing different operations.

Franz Miederhoff OHG workpiece fixture selection

When selecting pneumatic grippers and jaw designs, these are the main factors to consider: 1) Part shape, orientation, and size differences: If the object has two opposing flat surfaces, a double-jaw parallel gripper can be used, which can address size 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 in place while performing the required operations on it. When calculating the required clamping force, the type of jaw design must be considered. 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 requirements of the gripper jaws. If external operations on the object are required, internal clamping is necessary. Scissor-type grippers are usually cheaper 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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