Section 1: Principle of Liquid Expansion Clamp
Different from standard liquid expansion fixtures, the liquid expansion fixture utilizes static pressure expansion technology. After the fixture is pressurized, the hydraulic medium generates high pressure under the action of the pressurizing mechanism, forcing the deforming element to uniformly elastic deform over the entire clamping range at 360° circumferentially, thereby achieving tightness on the locating holes/axes of the workpiece.
Section 2: Features of the Liquid Expansion Clamp
1. The fixture is filled with a liquid medium inside.
2. The working surface of the fixture is elastic deformation
3. Apply even clamping force without deformation to the workpiece in a circular manner
4. High clamping force, up to 100 MPa
5. Low workpiece deformation, high machining accuracy; fixture dynamic accuracy less than 0.003MM.
6. Quick clamping and disassembly of workpieces, resulting in high work efficiency.
7. Tailor-made according to equipment and workpieces, with strong adaptability.
8. The expansion is 0.3% of the clamping diameter.
9. Utilizing attachments like diameter springs and splined springs, the processing of various size and specification workpieces can be achieved.
10. Achieves rapid changeover of workpieces and fixtures
Section 3: Structure and Types of Liquid Expansion Clamps
Grinding Application
IV. Technical Parameters of Liquid Expansion Clamp
1. Application Scope
The maximum allowable expansion of the hydraulic胀胀clamping fixture does not exceed 3% of the clamping diameter; generally, good clamping accuracy and service life can be achieved when the size tolerance of the clamped workpiece section is H7 or above.
2. Pressure Control
Manual pressure liquid expansion clamps are strongly recommended to use a torque wrench and apply pressure according to the recommended torque values; liquid expansion clamps for machine tools with automatic pressure should also be pressurized according to the recommended machine thrust, pull force, or hydraulic cylinder oil pressure.
3. Precision Testing
Jig precision should be measured against standard parts, and the accuracy should comply with the technical agreements between both parties.
4. Pressure Testing
The fixture failed to clamp the standard parts within the recommended pressure range, indicating a failure in the liquid swelling fixture's clamping. Please contact the company's technician.
Section 5: Precautions for Using Liquid Expansion Clamps
① Pay attention to not over-inflate the liquid expansion fixture when there are no workpieces or standard parts being held.
②Apply anti-rust oil regularly and evenly; note that the anti-rust period is three years. Especially, do not forget the anti-rust treatment before and after use.
③Upon completion or during periodic use, ensure comprehensive dust protection to prevent any impact on subsequent use.
④ Recommend packaging in wooden crates and placing them in a dry, spacious area for static storage.
