A holding fixture for a workpiece 37.5 mm thick at the clamp locations is being designed. The detail of one of the clamps is shown in the figure. A spring is required to drive the clamp upward when removing the workpiece with a starting force of 45 N. The clamp screw has an M10x1.25 thread. Allow a diametral clearance of 1.25 mm between it and the uncompressed spring. It is further specified that the free length of the spring should be Lo S 48 mm, the solid height Ls S 31.5 mm, and the safety factor when closed solid should be n, 21.2. Starting with d=2 mm, design a suitable helical coil compression spring for this fixture. For A227 HD steel, wire diameters are available in 0.2-mm increments between 0.2 to 3.2 mm.

A holding fixture for a workpiece 37.5 mm thick at the clamp locations is being designed. The detail of one of the clamps is shown in the figure. A spring is required to drive the clamp upward when removing the workpiece with a starting force of 45 N. The clamp screw has an M10x1.25 thread. Allow a diametral clearance of 1.25 mm between it and the uncompressed spring. It is further specified that the free length of the spring should be Lo S 48 mm, the solid height Ls S 31.5 mm, and the safety factor when closed solid should be n, 21.2. Starting with d=2 mm, design a suitable helical coil compression spring for this fixture. For A227 HD steel, wire diameters are available in 0.2-mm increments between 0.2 to 3.2 mm.

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter8: Applications Of Plane Stress (pressure Vessels, Beams, And Combined Loadings)

Section: Chapter Questions

Problem 8.3.5P: An inflatable structure used by a traveling circus has the shape of a half-circular cylinder with...

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Question

A holding fixture for a workpiece 37.5 mm thick at the clamp locations is being designed. The
detail of one of the clamps is shown in the figure. A spring is required to drive the clamp upward
when removing the workpiece with a starting force of 45 N. The clamp screw has an M10x1.25
thread. Allow a diametral clearance of 1.25 mm between it and the uncompressed spring. It is
further specified that the free length of the spring should be Lo ≤ 48 mm, the solid height L, S
31.5 mm, and the safety factor when closed solid should be n, 21.2. Starting with d=2 mm,
design a suitable helical coil compression spring for this fixture. For A227 HD steel, wire diameters
are available in 0.2-mm increments between 0.2 to 3.2 mm.
Spherical washer
Slot
Workpiece -
Clamp screw
AAAAAA
Clamp
Groove
Pin

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