Wuhan Iron and Steel Group Echeng Steel Plant: 80,000 joule drop hammer impact testing machine project

Wuhan Iron and Steel Group Echeng steel plant has a number of drop hammer impact testing machines，The 10,000 80000J drop weight impact testing machine purchased this time is mainly used for the drop weight tear test (DWTT) of ferritic steel.,At the same time, different forms of hammer and anvil can also be customized to meet the test requirements of other test methods。

The equipment is mainly composed of main frame, hammer assembly, lifting system, grab and drop hammer device, sample delivery device, buffer device, sample recovery device, safety protection device, control system and other parts。The machine can adjust the impact energy by adjusting the amount of balance weight and adjusting the impact height, so that the energy range can be stepless adjustable。

The working mode of the machine is free fall type. Due to the huge energy, Wanji has designed a perfect safety protection system for the machine and a fully automatic robot sample delivery and sampling to ensure the safety protection of the person and equipment during the operation。

In order to ensure industrial safety and reliability, the machine is equipped with Siemens PLC electrical control system and touch screen operation, which realizes the characteristics of simple, reliable and convenient。

Aiming at the shortcomings of low reliability and poor stability of equipment, which are common in large energy drop hammer at present，Wanyi will use a new type of grab hammer structure developed by itself，Ensure 100% reliability of the grab hammer，At the same time, the industrial grade Siemens PLC electrical control system is used，Ensure the equipment to achieve industrial stability，Ensure long-term, continuous use without failure。

Main technical parameters:

1. Maximum impact energy: 80000J;
2, the total weight of the hammer: 2400kg;The basic weight of the hammer is 1620kg; 
3, maximum lifting height: 3.4m；
4, impact speed: 5m/s ~ 8.16 m/s；
5. Working mode of buffer: electro-hydraulic servo hydraulic buffer;
6, height measurement resolution: 0.1mm；
7, height measurement error: ≤±10mm;
8. The deviation between the center of the hammer edge and the center of the support: ≤±1.5mm；
9. DWTT anvil span: 254±1.5mm；
10, DWTT anvil block radius: R14.3±1.59mm (meet GB/T8363-2007 and American API RP 5L3:1996 standard);
11. DWTT hammer head arc radius: R25±0.1mm；
12, DWTT anvil and hammer hardness: HRC58-HRC65;
13, DWTT anvil and hammer material: high strength alloy steel;
14, sample size: (305±5) × (76.2±1.5）×（3～40）mm； 15, the maximum height of the host: 6.3米；
16, automatic manipulator snatch maximum sample weight: 10kg;
17, automatic manipulator repeated positioning accuracy: ±1mm;
18, the completion of the test time (sample from the cryogenic tank to the anvil until the impact is completed) : ≤10s。