German TOX PRESSOTECHNIK workpiece fixtures, TOX PRESSOTECHNIK models, TOX PRESSOTECHNIK prices

TOX PRESSOTECHNIK 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. In a broad sense, any device used to quickly, conveniently, and safely install workpieces 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 in 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 complete machining at several stations in one setup, including rotary indexing devices and linear indexing devices), connecting elements, and fixture bodies (fixture bases). Examples include welding fixtures, inspection fixtures, assembly fixtures, and machine tool fixtures, among which machine tool fixtures are the most common and are often referred to simply 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 and securely clamped before machining.

TOX PRESSOTECHNIK workpiece fixture requirements

Whether gripper-type or suction-type, robot end-effectors must also have the repeatability required for the task. The structure of the robot end-effector should be as simple and compact as possible, with light weight, to reduce the load on the arm. Dedicated robot end-effectors have a simpler structure than general-purpose ones, but offer high efficiency and can perform various tasks. In contrast, "universal" end-effectors may have disadvantages such as complex structures and high costs. Therefore, it is recommended to design and use serialized, standardized, dedicated robot end-effectors that can be quickly replaced. If an object has two opposing flat surfaces, a parallel two-jaw gripper can be used to address dimensional deviations. For cylindrical objects, a two-jaw gripper can also be used for clamping. Note that retaining or encompassing grips require less force.

TOX PRESSOTECHNIK workpiece fixture features

Workpieces produced in small batches with high variety account for approximately 85% of the total number of workpiece types. Modern production requires companies to frequently update their product lines to meet market demands and competition. However, most companies are still accustomed to extensively using traditional dedicated fixtures. In factories with medium production capacity, there are typically thousands to nearly ten thousand dedicated fixtures. On the other hand, in companies with high-variety production, about 50~80% of dedicated fixtures need to be updated every 3~4 years, while the actual wear of the fixtures is only about 10~20%. To meet the application of new machining technologies such as CNC machine tools, machining centers, group technology, and flexible manufacturing systems (FMS), machine tool fixtures have the following characteristics: 1) They can quickly and conveniently equip new products for production, shortening the production preparation cycle and reducing production costs; 2) They can clamp a group of workpieces with similar characteristics; 3) They are suitable for high-precision machine tool fixtures for precision machining; 4) They are suitable for new types of machine tool fixtures for various modern manufacturing technologies; 5) They adopt efficient clamping devices powered by hydraulic stations, etc., to further reduce labor intensity and improve labor productivity; 6) Improve the standardization level of machine tool fixtures. This is mainly reflected in four aspects: standardization, precision, efficiency, and flexibility.

TOX PRESSOTECHNIK workpiece fixture selection

When selecting pneumatic grippers and jaw designs, these are the main factors to consider: 1) Part shape, orientation, and dimensional differences: If an object has two opposing flat surfaces, a parallel two-jaw gripper can be used to address dimensional deviations. For cylindrical objects, a two-jaw gripper can also be used for clamping. Note that retaining or encompassing grips require less force. 2) Part weight: The clamping force must be sufficient to hold the object in place while performing the required operations. 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 task being performed and the spatial size of the gripper jaws. If external operations are to be performed on the object, internal clamping is required. Scissor-type grippers are usually cheaper but require more space for jaw movement. 4) Environment: Grippers used in harsh environments or cleanrooms need to have corresponding designs. 5) Object retention: When air pressure is no longer supplied, the gripper will release the object, causing it to drop. For such applications, spring-assisted grippers can be used.

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