German walter workholding fixtures walter model walter price

walter workholding fixtures refer to 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 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 to the 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 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.

walter workholding fixture requirements

Whether gripper-type or vacuum-type, the robot end-effector must also meet the repeatability precision 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. Specialized 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 structures and high costs. Therefore, it is recommended to design and use serialized, standardized, specialized robot end-effectors that can be quickly replaced. If an object has two opposing flat surfaces, a parallel double-jaw gripper can be used to address dimensional deviation issues. For cylindrical objects, double-jaw grippers can also be used for clamping. Note that retaining or encompassing gripping requires less force.

walter workholding fixture features

1) Suction force: Electrically controlled powerful magnetic chucks provide extremely strong holding force, up to 16kg/cm², with uniform and adjustable magnetic field distribution, suitable for various heavy-duty machining, rough machining, and finish machining operations; standard powerful magnetic chucks have weaker and uneven suction force, unable to meet the requirements of heavy-duty machining. 2) Machining precision: The holding force of electrically controlled powerful magnetic chucks does not require a continuous power supply to maintain, generating no heat during continuous operation, thus avoiding thermal deformation of the workpiece. Meanwhile, the strong and uniform surface suction ensures the highest machining precision even if the workpiece extends beyond the table surface; whereas standard electromagnetic chucks require a continuous current supply, generating heat after a period of operation, which not only causes thermal deformation of the workpiece but also reduces the magnetic force of the chuck, failing to guarantee machining precision. 3) Performance: Electrically controlled powerful magnetic chucks can be used continuously, operating for more than 20 hours daily without any failures or need for maintenance; standard permanent magnetic chucks experience a decline in suction force after about half a year of use, while electromagnetic chucks can only operate for a few hours each day, are prone to malfunctions, and require frequent replacement and maintenance of internal components. 4) Operational efficiency: Using standard powerful magnetic chucks requires significant time for workpiece adjustment, accounting for 40%-50% of the entire machining process, and clamping positioning is prone to obvious errors, resulting in a high scrap rate and very low efficiency; electrically controlled powerful magnetic chucks feature automatic auxiliary positioning, allowing workpiece clamping or release to be completed in 0.3 seconds with the simple press of a button, significantly improving production efficiency.

walter workholding fixture selection

When selecting pneumatic grippers and jaw designs, these are the main factors to consider: 1) Part shape, orientation, and dimensional variations: If an object has two opposing flat surfaces, a parallel double-jaw gripper can be used to address dimensional deviation issues. For cylindrical objects, double-jaw grippers can also be used for clamping. Note that retaining or encompassing gripping requires less force. 2) Part weight: The clamping force must be sufficient to hold the object securely during 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 constraints of the gripper jaws. If external operations are to be performed on the object, internal clamping is required. Scissor-style grippers are usually lower in cost 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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