Common fixture methods for thin-walled parts
Common tooling methods
1 Pressing plate clamping
Pressing plate clamping is to use bolts and pressing plates to clamp workpieces on the worktable. This clamping method is widely used, but it is troublesome and inefficient.
2 Force measuring vice clamp
The force measuring vise is a kind of vise that can adjust and control the clamping force, which is convenient for clamping. General small shell (200 mm × 200 mm × 50mm) The workpiece can be directly clamped on the jaw of the vice for processing. The key of clamping is to calibrate the vise, select the appropriate position on the workpiece for clamping, and adjust and control the clamping force to prevent the part from clamping deformation or clamping failure due to too small clamping force.
3 Combination fixture
The modular fixture is a highly standardized, serialized and universal advanced fixture. After a few hours of assembly, the modular fixture components and assemblies can be used to meet the requirements of parts processing. The modular fixture is flexible and adaptable. At the same time, the fixture can be assembled and disassembled, and the components can be recycled until they are worn and discarded. It is currently the most widely used fixture in mechanical manufacturing at home and abroad.
4 Vacuum adsorption clamping
The vacuum is produced in the closed cavity of the fixture through the vacuum pipe and the sealing effect of the rubber seal ring, and the workpiece is compressed by atmospheric pressure. Although the clamping force generated by the pressure difference is small, it is evenly distributed and has a large adsorption area, so it is suitable for clamping non magnetic conductive sheet workpieces or large thin shell workpieces with poor rigidity.
5 Magnetic adsorption
The slot on the bottom of the machined part shall be magnetic adsorption, because the workpiece and the fixture cannot be sealed, vacuum adsorption clamping cannot be used. The magnetic adsorption clamp is shown in Figure 2. The magnetic absorption shall be carried out before the real narrow pump is turned off. The magnetic block shall be arranged on the surface that does not need to be grooved. The magnetic block shall be wrapped with a rubber sleeve to avoid crushing the machined surface. The distribution density of magnetic blocks shall be uniformly arranged according to the size of the workpiece.