Study of parameters influencing punch press noise.
Stewart-ND; Bailey-JR; Daggerhart-JA
Noise Control Eng 1975 Sep; 5(2):80-86
A study was conducted of punch press noise generated by a single- cycle punching operation, which is typical for presses requiring frequent changes in tooling. Peak noise levels associated with clutch and brake activation were reduced approximately 6 decibels through installation of commercially available mufflers. It has been shown that both workpiece and machine structural vibrations are significant contributors to radiated sound for those operations in which the workpiece dimensionless vibration factor is greater than one. Studies of punch-die clearance have shown that the smallest clearance consistent with required hole quality should be used. Specifically, a reduction of approximately 10 decibels was observed in peak punching noise level as the clearance was reduced from 20 percent to 6 percent. Using the A-weighting network, the reduction in peak noise level was approximately 15 decibels for the same change in clearance. Further for a given clearance, the use of a shear punch has been shown to provide from 5 decibels to 10 decibels reduction in peak punching noise level.
NIOSH-Grant; Noise-induced-hearing-loss; Noise-sources; Environmental-engineering; Safety-engineering; Occupational-health; Noise-levels; Noise-control; Control-measures; Control-equipment; Safety-equipment; Noise-damping; Impact-noise; Metalworking; Design
Mechanical and Aerospace Engr North Carolina State Univ Post Office Box 5801 Raleigh, N C 27607
Noise Control Engineering
North Carolina State University Raleigh, Raleigh, North Carolina