Drop Hammer Impact Tester: Structure, Installation, and Usage Guide
Structure
The drop hammer impact tester is composed of several key components, including the frame, body, hammer assembly, lifting mechanism, anti-secondary impact system, automatic dropping device, and an electronic control cabinet.
1. The main structure consists of a sturdy frame, the body, the hammer assembly, lifting system, and an anti-secondary impact mechanism. It also includes an automatic drop system and an electronic control panel for monitoring operations.
2. A stepper motor, guided by electromagnetic iron, controls the lifting and lowering of the hammer body, ensuring safe operation and protection during the process.
3. The motor drives a reducer that adjusts the height of the hammer. The control cabinet features a display that shows the current lift height for accurate positioning.
4. The anti-secondary impact device uses a traction electromagnet to control the hammer after it strikes the sample. If the sample does not break, the photoelectric sensor triggers the secondary impact clamp to prevent re-impact.
Installation Method
To install the machine, place the main unit on a flat and stable surface. First, connect the column with the upper beam, then position the guide tube vertically inside the observation tube. Finally, place the column on the base and secure it properly.
Usage Instructions
1. Determine the required hammer mass and drop height based on your test specifications, and prepare the sample accordingly.
2. Choose the appropriate hammer configuration:
- a. For R5×19, R10×19, R25×19, R30×19, R50×25 (aluminum, 40Cr mixed):
- A + A + nut = 0.50kg
- B + B + nut = 1.75kg
- C + C + C + nut = 9.50kg
- b. For R50×90 steel hammer head:
- A + A + nut = 1.25kg
- B + B + nut = 2.50kg
- C + C + C + nut = 10.25kg
- c. For R50×90 aluminum hammer head (1kg impact):
- A + R50×90 aluminum + nut = 1.00kg
- d. For 0.25kg impact:
- 0 + R50×25 (aluminum) + nut = 0.25kg
3. Insert the hammer rod into the sliding sleeve under the hammer seat, place the selected weight on the rod, and tighten the nut securely.
4. Turn on the power supply and enter the working mode.
5. Press the "fast drop" button to release the electromagnet, then press "stop" to allow safe placement of the hammer.
6. Open the test chamber door, place the sample on the V-shaped support, and rotate the handle until the sample just touches the cover.
7. Press the "down" button to lower the hammer. Once the electromagnet engages, the hammer will rise to 2 meters.
8. Press the "pre-drop" button first, then the "down" button to initiate the automatic drop. After impact, the photoelectric switch activates the solenoid valve to prevent secondary impacts.
9. Remove the sample for inspection.
10. For subsequent tests, press the "clear" button, then "fast drop" to reset the hammer. Repeat steps 7 and 8 as needed.
11. To shut down, turn off the power switch on the control box and the main power supply.
Precautions
1. Ensure the testing machine is placed on a solid, level foundation to avoid instability during operation.
2. Always follow safety protocols. Never operate under the hammer while it is being lifted or lowered. Keep the protective door closed during testing.
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