Baltimore Tool Chisel Test Stand Baltimore Tool President: Harry McCarty Baltimore Tool Representative: Dennis Shewbridge Consultant: Peter Popper Team 3: Matt Mitch Marc Orgovan Joe Stephens Faculty Advisor: James Glancey Nate Cloud

Mission Statement:  Baltimore Tool would like to test the effectiveness of newly created chisels.  The impact transferred by these chisels is unknown.  The test stand will examine the impact transferred and any reduction in noise. ---The team will provide Baltimore Tool with an automated test stand to evaluate their chisels.

Critical functions of the test stand  The test stand needs to measure the impacts to failure of the sample  The device needs to measure the sound of the impact  The test stand must help in the promotion and sales of the newly designed chisels  The device must be marketable  Needs to be safe  Machine needs to stop (possibly by an operator) when the test piece is fractured  Needs to run on 110 volt power source  The test stand must be able to last at least 20,000 impacts Constraints for the stand

Current Testing: Analysis of Hammer Swing Variables

Critical Components of the Device  Hammer Swinging System  Securing of the Chisel  Securing of the Sample  Anvil  Base/Frame  Sound Meter  Impact Counter  Safety Shield (Not Pictured) Projected Prototype:

Customer and their Wants Harry McCarty Realistic Impact, Realistic Motion, Good Appearance, Low Cost, Variable Velocity Peter Popper Realistic Impact, Realistic Motion, Simulate Follow Through/Wrist Break, Variable Impact Velocity, Pizzazz Trade Show Participants Realistic Impact, Realistic Motion, Simulate Follow Through/Wrist Break, Variable Velocity, Pizzazz Tester Manufacturer Low Cost, Ease of Assembly, Minimize Material Parts Tester Vendor Low Cost, Good Appearance, Realistic Motion, Realistic Impact, Pizzazz

Tests: Impact Force Test (to determine the required impact force) Clamp Testing Force Input Test (to find the required input force)

Selection of Critical Component  This system is the most critical because it delivers the realistic motion and impact.  Two choices for hammer swinging devices remained after the first phase.  They were a pinned cylinder system and a cylinder slider system.  The pinned cylinder system was chosen.

Wants and Associated Metrics With Target Values Realistic Impact (41%)Angle of Impact (zero degrees), Bounce Back Height (0 in), Velocity of Impact (35fps) Realistic Motion (24%)Length of Arm (2ft), Stroke Angle of Displacement (60 degrees), Frequency of Impacts(1 per second) Low Cost (12%)Manufacturing Time (1 day), Total Cost (<3500$) Good Appearance (11%)Number of Colors (3) Variable Impact Velocity (5%)Range of Impact Velocity (20-50 fps), Number of Impact Velocities (5) Simulate Follow-thru/Wrist break (4%)Bounce Back Height (0 in) Ease of Assembly (2%)Number of Major Parts (<10), Assembly Time (<2hrs), Number of Assembly Tools (<30 tools) Pizzazz (1%)Number of Colors (3), Minimize Material Requirement (1%)Height (5 ft), Width (<3 ft), Weight (<300 pounds), Number of Major Parts (<10)