IK mechanical impact testing device

According to the requirements of 8.2.101.2 in GB7251.5-2008, a steel sphere or similar object with a mass of 2kg is lifted to a height of 1m and then impacted on the surface of the tested equipment set in the form of a pendulum motion, providing an impact energy of 20J. Each vertical surface visible when the tested equipment set is in normal use position should be impacted once to complete the impact resistance test of the specimen

According to the requirements of 8.2.101.5 in GB 7251.5-2008, a steel impact object of the shape specified in Figure 108 of the standard, with a mass of 5kg, is used to fall from a height of 0.4m in the form of pendulum motion and impact the surface of the tested equipment (hereinafter referred to as the "test piece"), forming an impact energy of 20J. The four sides of the test piece are impacted once respectively to complete the verification of the mechanical impact resistance of the diagonal object.

1.1.10Applicable standard

Q/GDW11008-2013Technical Specification for Low Voltage Metering Box and referenced documents within this technical specification

GB7251.5-20088.2.101.2 Verification of Impact Resistance in Low Voltage Switchgear and Control Equipment Part 5: Special Requirements for Power Distribution Equipment in Public Power Grids

GB7251.5-2008Part 5 of "Low Voltage Switchgear and Control Equipment": Special Requirements for Power Distribution Equipment in Public Power Grids) 8.2.101.5 Verification of Mechanical Impact Resistance of Diagonal Objects

1.1 Main technical indicators

1.1.1Technical parameters for impact resistance of test specimens: spherical impact object mass 2kg ± 2%

Swing rod length 1m ± 1%

Curvature radius of the impact surface 39.3mm ± 1%

Rockwell hardness of the impact surface ≥ 58HRC

The maximum value of the surface roughness parameter Ra of the impact surface is 0.8um

Initial potential energy 20J ± 2%

Pendulum torque 19.6Nm ± 2%

Impact instantaneous velocity 4.43m/s ± 3%

The energy loss during the testing process is less than 1%

The overall displacement of the specimen during impact testing is less than 2mm

1.1.2Technical parameters for mechanical impact resistance of diagonal objects: mass of impact object 5kg ± 2%

Swing rod length 1m ± 1%

Rockwell hardness of the impact surface ≥ 58HRC

Initial potential energy 20J ± 2%

Pendulum torque 49Nm ± 2%

The maximum value of the surface roughness parameter Ra of the impact surface is 0.8um

Impact instantaneous velocity 2.8m/s ± 3%

The energy loss during the testing process is less than 1%

The overall displacement of the specimen during impact testing is less than 2mm

1.1.3The clamping force of the fixture is greater than 3000N

Fixture static holding force>10kN

1.1.4Parameter testing requires that the maximum relative error between the actual initial potential energy of the impactor and its nominal value be ± 2% of its nominal value

The maximum relative error between the pendulum moment of the impactor and its nominal value is ± 2% of its nominal value

The deviation between the impact point of the impactor and its center of mass is ≤± 3mm

The error between the velocity at the moment of impact and its nominal value shall not exceed ± 3% of the nominal value

Mechanical static load test device