The machine must be equipped with a broach (or plug), fitted with side cutting templates to remove the material (swarf) from the sample.
A hydraulic unit above the crossbar pushes the broach vertically from the top, while the sample is kept in position by a vice at the base of the equipment and carved.
Depending on the type of broach used, it will be possible to obtain U or V-shaped notches of different depths (2 to 5 mm), as required by the reference standards.
At the end of the cycle the processed samples will have KV, KU or KCU notches, to ensure correct breaking as contemplated by the Charpy Resilience Test reference standards.
ACCORDING TO STANDARDS:
ASTM E23 Standard Test Methods for Notched Bar Impact Testing of Metallic Materials
ASTM A370 Standard Test Methods and Definitions for Mechanical Testing of Steel Products.
Test methods and basic specifications
UNI EN ISO 148-1 Metal Materials – Charpy Resilience Test – Part 1:Test Method
Broach for 2 mm deep KV notches according to UNI EN ISO 148-1
Broach length: 350 mm
Carving speed: adjustable from 0.5 to 4 mm/sec
Control: hydraulic, semi-automatic
Accessories included: broach centring and guide support
Dimensions: 750 x 490 x 1730M mm (L x W x H)
Weight: About 100 kg
Power supply: 380 – 400 V / 50 Hz / 3F