- Part Number:1910
- Part Number Title:Occupational Safety and Health Standards
- Subpart:1910 Subpart O
- Subpart Title:Machinery and Machine Guarding
- Standard Number:
- Title:Forging machines.
- GPO Source:
General requirements -
Use of lead. The safety requirements of this subparagraph apply to lead casts or other use of lead in the forge shop or die shop.
Inspection and maintenance. It shall be the responsibility of the employer to maintain all forge shop equipment in a condition which will insure continued safe operation. This responsibility includes:
Hammers and presses.
All presses shall be installed in such a manner that they remain where they are positioned or they are anchored to foundations sufficient to support them according to applicable engineering standards.
Table O-11 - Strength and Dimensions for Wood Ram Props
|4 x 4||16||5,000||80,000||10||8,000||44|
|6 x 6||36||5,000||180,000||10||18,000||66|
|8 x 8||64||5,000||320,000||10||32,000||88|
|10 x 10||100||5,000||500,000||10||50,000||100|
|12 x 12||144||5,000||720,000||10||72,000||132|
1 Footnote Actual dimension.
2 Footnote Adapted from U.S. Department of Agriculture Technical Bulletin 479. Hardwoods recommended are those whose ultimate crushing strengths in compression parallel to grain are 5,000 p.s.i. (pounds per square inch) or greater.
3 Slenderness ratio formula for short columns is L/d=11, where L=length of timber in inches and d=least dimension in inches; this ratio should not exceed 11.
Hammers, general -
Keys. Die keys and shims shall be made from a grade of material that will not unduly crack or splinter.
Foot operated devices. All foot operated devices (i.e., treadles, pedals, bars, valves, and switches) shall be substantially and effectively protected from unintended operation.
Presses. All manually operated valves and switches shall be clearly identified and readily accessible.
Power-driven hammers -
Safety cylinder head. Every steam or airhammer shall have a safety cylinder head to act as a cushion if the rod should break or pullout of the ram.
Shutoff valve. Steam hammers shall be provided with a quick closing emergency valve in the admission pipeline at a convenient location. This valve shall be closed and locked in the off position while the hammer is being adjusted, repaired, or serviced, or when the dies are being changed.
Cylinder draining. Steam hammers shall be provided with a means of cylinder draining, such as a self-draining arrangement or a quick-acting drain cock.
Pressure pipes. Steam or air piping shall conform to the specifications of American National Standard ANSI B31.1.0-1967, Power Piping with Addenda issued before April 28, 1971, which is incorporated by reference as specified in § 1910.6.
Gravity hammers -
Air piping shall conform to the specifications of the ANSI B31.1.0-1967, Power Piping with Addenda issued before April 28, 1971, which is incorporated by reference as specified in § 1910.6.
Forging presses -
Mechanical forging presses. When dies are being changed or maintenance is being performed on the press, the following shall be accomplished:
Hydraulic forging presses. When dies are being changed or maintenance is being performed on the press, the following shall be accomplished:
Trimming presses -
Hot trimming presses. The requirements of paragraph (f)(1) of this section shall also apply to hot trimming presses.
Cold trimming presses. Cold trimming presses shall be safeguarded in accordance with § 1910.217(c).
General requirements. All upsetters shall be installed so that they remain on their supporting foundations.
Lockouts. Upsetters shall be provided with a means for locking out the power at its entry point to the machine and rendering its cycling controls inoperable.
Manually operated controls. All manually operated valves and switches shall be clearly identified and readily accessible.
Tongs. Tongs shall be of sufficient length to clear the body of the worker in case of kickback, and shall not have sharp handle ends.
Changing dies. When dies are being changed, maintenance performed, or any work done on the machine, the power to the upsetter shall be locked out, and the flywheel shall be at rest.
Other forging equipment -
Boltheading. The provisions of paragraph (h) of this section shall apply to boltheading.
Rivet making. The provisions of paragraph (h) of this section shall apply to rivet making.
Other forge facility equipment -
Billet shears. A positive-type lockout device for disconnecting the power to the shear shall be provided.
Saws. Every saw shall be provided with a guard of not less than one-eighth inch sheet metal positioned to stop flying sparks.
Conveyors. Conveyor power transmission equipment shall be guarded in accordance with ANSI B20.1-1957, Safety Code for Conveyors, Cableways, and Related Equipment, which is incorporated by reference as specified in § 1910.6.
Shot blast. The cleaning chamber shall have doors or guards to protect operators.
Grinding. Personal protective equipment shall be used in grinding operations, and equipment shall be used and maintained in accordance with ANSI B7.1-1970, Safety Code for the Use, Care, and Protection of Abrasive Wheels, which is incorporated by reference as specified in § 1910.6, and with § 1910.215.
[39 FR 23502, June 27, 1974, as amended at 49 FR 5323, Feb. 10, 1984; 51 FR 34561, Sept. 29, 1986; 61 FR 9227, March 7, 1996]