German spreitzer workpiece fixtures spreitzer model spreitzer price

spreitzer workpiece fixtures are devices used in the manufacturing process to secure the workpiece in the correct position for machining or inspection, also known as jigs. 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 and 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 (positioned) and securely clamped (clamped) before machining.

spreitzer 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 the object and grip it firmly 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 should be certain force constraints and shape constraints to ensure that the clamped workpiece is fully released during movement, dwelling, and loading. In addition, it should ensure that the geometric deviation of the workpiece holding posture is within the specified tolerance zone.

spreitzer 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 are wide adaptability and low production efficiency, 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 are compact structure, rapid, convenient, and labor-saving operation, ensuring high machining precision 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 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 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 are flexibility, strong versatility, short manufacturing cycle, and reusable components, making them particularly suitable for new product prototyping and single-piece small-batch production. 5) Pallet fixtures: Pallet fixtures are fixtures used on automated lines. This type of 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 different machining operations.

spreitzer workpiece fixture usage

With the continuous development of China's industry, electromagnetic chucks are increasingly widely used in industrial production. The most important aspect of an electromagnetic chuck is its parameters; among the performance parameters, the lifting capacity and its working class are the most critical. The so-called lifting capacity of an electromagnetic chuck refers to the maximum weight of the load allowed to be lifted under specified operating conditions, also known as the rated lifting capacity. Generally, for cranes equipped with electromagnetic chucks, the lifting capacity should also include the weight of the electromagnetic chuck itself. Rectangular electromagnetic chucks have lifting threaded holes on both sides; during installation, T-shaped screws can be screwed in for lifting. They are fixed to the workbench using T-shaped blocks and screws. Connect the DC power supply and ground wire from the machine tool, then precision grind the upper surface of the chuck once to ensure the parallelism between the upper surface and the bottom surface. When holding a workpiece, sufficient positioning holding force can be obtained by bridging two adjacent magnetic poles, allowing grinding operations to proceed. Magnetization and demagnetization of the workpiece can be controlled via the machine tool buttons. Before use, the surface of the electromagnetic chuck should be wiped clean to avoid scratches. Severe impacts are prohibited to prevent affecting accuracy. After use, it should be cleaned and coated with anti-rust oil to prevent corrosion. When using the electromagnetic chuck independently, a ground wire must be connected to prevent electric shock due to leakage.

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