Document MkEamxn31Nw24zQazyo2y2pk

6 1956 National Safety Congress white lead, and using; a xylol vehicle, were sprayed on metal panels then moved through banks of infra-red tights with natural ven tilation only. The fumes from the infra-red oven were rising and moving into the upper area oS one end of a large bay. The work in this portion of the bay necessitated the use of a crane and operator for extended periods. The crane operator was affected by headadies, loss of appitite, plus the problem of poor and sometimes dangerous crane opera tions. Since you undoubtedly have formulated an answer for this problem and know the results, this will merely be a continuation of your solution. A large blower, pending more adequate control ventilation was placed near the top of die infra-red oven and the contaminants moved out of the building. Result -- Xo more ill health and a safer crane operation. CASE 2. High noise levels were being caused by the air noise from an air hoist. The overall noise level was 114 decibels. A muffler was installed on the air release of the hoist and the noise level dropped down to 87 decibels, or a reduction in noise level of 27 decibels, which is in noise talk a whale of a reduction and in this case eco nomical. CASE 3. A crane operator was being affected by vapors from a fluoride salt being dumped into a steel ladle containing mpltrp steel. This was solved rather ingenuously by dunging the sue and shape of the fluoride salt crystals. At any rate, there were no more complaints iron the crane operators. There is no end to the number of success ful source control cases tha* could be cited, However, it is not always possible to con trol the hazard at its source so the next best thing to do it to supply protection to the employees who mar be affected by the hazard. Such was the case of the crane operator over a soaking pit operation in a steel mill. The temperature of the soaking pit was Z200F. The steel in the pit was removed by the crane and placed on a conveyor. Some infra-red heat was radiated and when this infra-red was considered, temperatures ranging upward to 140F. were found m the crane cabs. A new crane cab was designed having double glass walls, insulated floors and ceil ing and covered on the outside by alumi nized paint. An air conditioned unit sup plied air to the inside of the cab at the rate of 720 cubic feet per minute with a velocity through the grill inlet oi 300 fee: per minute. After this crane was placed in operation the crane cab temperature ranged from 86 to 90F. Quite a reduction from I40F. maxi mum to a 9QF. maximum with a subsequent drop in heat fatigue. Briefly, there is a second phase of ind:t-trial health at high plant levels. In machine shops, and other metal pro cessing industries, you will find solvents ot all kinds, some much more toxic than others; you will find plastic resins and their catytists, new cooling and new coating ma terials are common place. The supplier, for the-most part, recog nizes the haards oi these materials and issues instructions designed to minimize or eliminate the danger of injury from lire use os his product. We have been asked fn many plants to determine the source of health injuries and in the course of our surveys, would find that the cause of the injuries were due to violations of the in structions from the supplier. In many of the instances, the safety engineer had not been informed of the presence of the offending material Based on field experience, you. as a safety engineer, should continue to ask yourseli these questions: 1. Do I have a knowledge of the mate rials bring used in my plant? 2. Have l checked the list of materials recently to see if new ones have been added? 3. Have I checked my plant to see if new toxic materials are being used that have not been called to the atten tion of the safety department ? . 4. Are the toxic materials in my plant being used in accordance with the sup pliers instructions or as prescribed by Industrial Hygiene personnel ? If you can answer these questions in the affirmatives you have eliminated a sizeable number of your industrial health problems. You will also find that in this caw your overhead will be coming down which is my way of thinking is Industrial Health at a high plant level. Joint Meeting with the Power Press and Forging Section 7 Machining Metal with Safety By WILLIAM A. ISAACSON Divisional Safety Supvr., Stamping Div., Tank Plant, Chrysler Corp-, Detroit, Mich. What docs metal machining mean fo ycur Metal machining can he defined as an opera?i.i r.r operations, performed roost com:u.Iy by machine tools, in which metal is .old worked by progressively removing metal in the form of chips. Injuries that result irem the operation oi these machine tools most often result from unsafe practices or because of incorrect j.rocednrcs which are basically problems of training and supervision. In general, the three causes of accidmts and injuries are unsafe practices, unsafe conditions, and un-aie altitudes. Before going into the methods of acci dent prevention on machine tools, we should tir-t explain some oi the different types of .,}*rations and some of the most common *uu>es of accidents on each. The Xational Association of Machine Tool Builders has .-lissified some two hundred types of ma,-hine tods into five basic groups: 1. Milling II. Turning III. riamng IV. Grinding V. Boring Milling Machines Milling consists of machining a |*iece of metal by bringing it into contact with a ro uting cutter with multiple cutting edges. `Hie work is held on a table and fed past or into the cutter. Statistics reveal that milling operations are generally low in accident frequency, but high in severity. About two thirds of iltc milling machine accidents occur when opera tor. are unloading or attempt to make ad justments. Other causes of injuries exper ienced with use of this type of machinery include: 1. Measuring or calipering the work when the machine is operating. Z Using a rag to clean excess oil on the table while the cutter is turning. 3. Wearing gloves, ties or loose clothing. 4. Failure to draw' the job back to a safe - distance when loading or unloading. 5. Adjusting the coolant flow while cutter is turning. 6. C*ing a jig or vise which prevents close adjustment of the guard. 7. Failure to clamp the work securely. ft. leaving hand tools on the work table. Turning Machines Turning ouuists of shaping a rotating piece by means of a cutting tool, which is mounted on a carriage that provides infeed ur cross-feed of the tool. Work is com monly rotated between centers or while held by a chuck, face plate; or fixture. Some of the most common causes of in juries resulting from this type of .operation :: 1. Using calipers or gauge on the work while the machine is in operation. 2. Using the hand instead of a stidc to hold emery doth against the work ot filing the rotating piece right-handed. X Flying metal chips or attempting to clean chips when machine is in opera tion. 4. Contact with projections on face plates, chucks, or lathe dogs. 5. Hand braking of machine. Planing Machines Planing (iterations are primarily intended inr machining flat surfaces but can be ar ranged for machining many kinds of curvnl rJd. or irregular surfaces also. Shapers although generally classified aplaning machines, differ slightly from the leaner machines in that the work is fastened into a vise or fixture and the cutting tool is passed back and fourth over the work.