Section 1: Principle of Liquid Expansion Clamping Device

Different from conventional liquid expansion clamps, the liquid expansion clamp utilizes static pressure expansion technology. After the clamp is pressurized, the hydraulic medium generates high pressure under the action of the pressurizing mechanism, forcing the deforming element to uniformly deform elastically in a 360° circumferential direction across the entire clamping range, thereby achieving tightness on the locating holes/axes of the workpiece.

II. Features of Liquid Expansion Clamps

1. The fixture is filled with a liquid medium internally.

2. The working surface of the fixture is elastic deformable.

3. Clamp the workpiece in a circular manner, ensuring even pressure without deformation.

4. High clamping force up to 100 MPa

5. Low workpiece deformation, high machining accuracy; fixture dynamic accuracy less than 0.003MM.

6. Quick workpiece clamping and dismounting, with high work efficiency.

7. Customized according to equipment and workpiece, with strong adaptability.

8. The expansion amount is 0.3% of the clamping diameter.

9. Utilizing attachments such as tapered leaf springs and spline leaf springs, various size and specification workpieces can be processed.

10. Achieves rapid changeover for workpieces and fixtures

Section 3: Structure and Types of Liquid Expansion Clamps

Gear Insert Applications

4. Technical Parameters of the Liquid Expansion Fixture

1. Application Range

The maximum allowable expansion of the liquid-filled fixture does not exceed 3% of the clamping diameter; generally, good clamping accuracy and service life can be achieved when the dimension tolerance of the clamped workpiece section is H7 or higher.

2. Pressure Control

Manually pressurized hydraulic胀紧夹具, it is strongly recommended to use a torque wrench and apply pressure according to the recommended torque value; For hydraulic胀紧夹具 on machine tools with automatic pressure, pressure should also be applied according to the recommended machine force, tension, or hydraulic cylinder oil pressure.

3. Precision Testing

The fixture precision should be measured against standard components, with accuracy in line with the technical agreements between both parties.

4. Pressure Testing

The fixture failed to clamp the standard part within the recommended pressure range, indicating a failure of the liquid expansion fixture to clamp. Please contact the company's technician.

Section 5: Precautions for Using Liquid Expansion Clamps

① Pay attention to not allow the liquid expansion fixture to expand in the absence of workpieces or standard parts.

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.

Upon completion or periodic use, ensure thorough dust protection to prevent any impact on subsequent use.

④ Suggest packing the liquid expansion assembly in wooden crates and placing it in a dry, spacious area for storage.