German eckold workpiece fixtures eckold model eckold price

eckold workpiece fixtures are devices used in the manufacturing process to secure the workpiece, ensuring it occupies the correct position for machining or inspection; they are also known as jigs. Broadly speaking, any device used to quickly, conveniently, and safely install a workpiece during any operation in 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 to 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 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 (positioning) and securely held (clamping) before machining.

eckold workpiece fixture requirements

Whether gripper-type or suction-type, the robot end-effector 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, offer high work efficiency, and can perform various tasks. In contrast, "universal" end-effectors may have disadvantages such as complex structure and high cost. Therefore, it is recommended to design and use serialized, standardized, dedicated robot end-effectors that can be quickly changed. If an object has two opposing flat surfaces, a parallel two-jaw gripper can be used to address dimensional deviation issues. For cylindrical objects, a two-jaw gripper can also be used for holding. Note that retaining or encompassing gripping requires less force.

eckold 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 varieties to adapt to market demands and competition. However, most companies are still accustomed to extensively using traditional dedicated fixtures. Generally, factories with medium production capacity own thousands to nearly ten thousand sets of dedicated fixtures. On the other hand, in companies with high-variety production, approximately 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 and other power sources to further reduce labor intensity and improve labor productivity; 6) They improve the standardization level of machine tool fixtures. This is mainly reflected in four aspects: standardization, precision, efficiency, and flexibility.

eckold 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 deviation issues. For cylindrical objects, a two-jaw gripper can also be used for holding. Note that retaining or encompassing gripping requires less force. 2) Part weight: The gripping force must be sufficient to hold the object securely while performing the required operations. The type of jaw design must be considered when calculating the required gripping force. Please note that safety factors should be considered when selecting the required force, and air pressure is also a factor to note. 3) Accessibility: This relates both to the task being performed and to the spatial size of the gripper jaws. If external operations are to be performed on the object, internal gripping is required. 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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