I. Principle of the Liquid Expansion Clamp

Unlike conventional 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 deform elastically over the entire clamping range in a 360° circumferential direction, thereby achieving tightness on the locating holes/axes of the workpiece.

Section II: Features of the Liquid Expansion Clamp

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

2. The working surface of the fixture is elastic deformation

3. Perform circular clamping on the workpiece, 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 to fit equipment and workpieces, with strong adaptability.

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

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

10. Achieve rapid changeover of workpieces and fixtures

Section 3: Structure and Types of Liquid Expansion Clamps

Rimming Application

Section 4: Technical Parameters of Liquid Expansion Clamps

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 are achieved when the dimension tolerance of the workpiece to be clamped is H7 or above.

2. Pressure Control

Manually pressurized liquid-extended clamping fixtures, it is strongly recommended to use a torque wrench and apply pressure according to the recommended torque values; for liquid-extended clamping fixtures on machine tools with automatic pressure, pressure should be applied according to the recommended machine thrust, pull force, or hydraulic cylinder oil pressure.

3. Precision Inspection

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

V. Important Usage Precautions for Liquid-Filled Clamps

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

② Apply anti-rust oil evenly and regularly; 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.

④The liquid swelling assembly is recommended to be packed in wooden boxes and stored in a dry, open area.