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Mist control at a machining center, part 1: mist characterization.

Authors
Heitbrink-WA; Yacher-JM; Deye-GJ; Spencer-AB
Source
Am Ind Hyg Assoc J 2000 Mar/Apr; 61(2):275-281
NIOSHTIC No.
20020695
Abstract
At a machining center used to produce transmission parts, aerosol instrumentation was used to quantitatively study mist generation and to evaluate the performance of an air cleaner for controlling the mist. This machining center drilled and tapped holes at rotational speeds of 1000 to 3000 rpm. During most machining operations, the metalworking fluid (MWF) was flooded over the part. To facilitate metal chip removal during some operations, MWF was pumped through the orifices in some tools at a pressure of 800 psi. These machining operations were performed in a nearly complete enclosure that was exhausted to an air cleaner at a flow rate of 1.1 m3/sec (2400 ft3/m). Although the use of high-pressure MWF increased the mist concentration by about 200%, it did not affect the mist size distribution. The observed penetration through the air cleaner appeared to be mostly consistent with the manufacturer's specifications on the air cleaner's filters. During the testing, MWF was observed to accumulate in the bottom of the filter housing and may have been reentrained due to air motion or mechanical vibration.
Keywords
Metalworking-fluids; Metalworking; Metalworking-industry; Machine-operation; Machine-operators; Machinists; Air-monitoring; Air-purification; Air-quality-measurement; Aerosols; Aerosol-particles; Metal-workers; Air-quality-monitoring; Air-quality; Air-purification
Contact
U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Division of Physical Sciences and Engineering, 4676 Columbia Parkway--R5, Cincinnati,
CODEN
AIHAAP
Publication Date
20000301
Document Type
Journal Article
Fiscal Year
2000
NTIS Accession No.
NTIS Price
Issue of Publication
2
ISSN
0002-8894
NIOSH Division
DPSE
Source Name
American Industrial Hygiene Association Journal
State
OH
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