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Difficulty: MediumStriking Tools

Unlike a standard ball-peen hammer that expands sheet metal radially in all directions, a cross-peen hammer is designed to spread metal primarily in one direction perpendicular to the line of its wedge-shaped peen.

Answer: Answer

Answer

True
The statement is accurate because the specialized wedge shape of a cross-peen concentrates compressive force along a contact line, causing the workpiece material to stretch and lengthen perpendicular to that contact line.

Step-by-Step Solution

1
Analyze the geometry of a cross-peen hammer head compared to a ball-peen hammer.
A ball-peen hammer has a hemispherical head that displaces metal uniformly outward from the point of impact, whereas a cross-peen hammer features a horizontal, chisel-like bevel (wedge) oriented perpendicular to the handle.
Tool geometry directly governs how force is distributed across the workpiece surface during impact.
2
Determine the resulting metal deformation pattern caused by striking with a linear wedge face.
Striking sheet metal or bar stock with a linear wedge restricts metal flow along the length of the line and forces the displaced material to flow outward across the width, expanding the material along one primary axis.
Material takes the path of least resistance, flowing away from the concentrated ridge of the wedge.

Key Concept

Cross-peen vs. ball-peen deformation characteristics in sheet metal and forging work
Estimated Time:45s
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Topics

Striking Tools

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