Ergonomics - Atlas Copco

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EXTERNAL LOAD When working with this tool external loads are small. No feed force is required and there is no wrist torque. Since the machine is a stall-torque tool for high torque levels and is always used with a reaction bar, there are no external loads from the process. WEIGHT The important factor is weight. A tool de- signed for torques of 1,000 N and above will be heavy. Evaluating this tool in terms of weight is a delicate task. It can be equipped with different gear trains to produce different torques, and the weight can vary be- tween 2.9 kg and 5.6 kg. As this tool is never used in intensive applications, the score is in the range of 10-20. Only the lightest tools are hand-held in operation. The majority of tools are sus- pended in balancers. In this evaluation we award the tool a score of 12. TEMPERATURE Cold air from the vane motor and heat emitted by the gear train will balance each other out quite effectively in a typical work situation. The temperature of the tool will thus be around room temperature, giving a score of 1. SHOCK REACTION The use of a reaction bar ensures that there will be no shock reaction, 0. VIBRATION The declared vibration value is
172 Score 40 30 20 10 0 NOISE The declared noise level is 79 dB(A). Daily exposure is one hour. L eq(8) = 10 log (1/8 • 10 7.9 • 1) = 70 dB(A) Thus, the score is 0. 6.5 3 12 1 - 6 - 4 hANDLE DESIGN ExTERNAL LOAD WEIGhT TEMPERATURE Fig. 4.10 Bar graph showing the overall result for the evaluation of the High Torque Nutrunner LTP 51. ShOck REAcTION VIBRATION NOISE DUST AND OIL DUST AND OIL No dust is created by the tool or by the process. The tool uses oil for lubrication. However, taking into consideration the way the tool is used, it is very unlikely that it will expose the operator to airborne oil in excess of 5 mg/m 3 in the breathing zone. The score is 4 according to Table 3.15 on page 132.
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Power Tool Ergonomics E V A L U A T
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Acknowledgements While doing resear
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How to get the best out of this boo
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Work with international standards I
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Good ergonomics is good economics W
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10 SOCIOLOGY INDUSTRIAL SOCIOLOGY S
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12 Work organization No organizatio
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1 outside the production system, an
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1 A seated operator usually has goo
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1 without stretching the trunk. The
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20 The arm sling as a preventive me
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22 Extreme working postures in real
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2 Working with high feed forces req
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2 Working areas of a standing works
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2 body is lifted or tilted, or the
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30 The team is an important factor
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32 Grinders Grinders and sanders ar
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34 HanDle DeSiGn The hand grips on
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36 DUSt anD oil Although the machin
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38 Working environment In general,
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40 SHoCK reaCtion Sudden changes in
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42 practice. Sometimes the chisel h
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44 SHoCK reaCtion These tools do no
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46 heavy, assembly work is often hi
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48 depends on its inertia. The same
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50 bolts. Unfortunately there are a
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52 The low reaction torque in impul
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54 the working environment A typica
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56 Today, the angle nutrunner can b
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58 High torque nutrunners for use w
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60 Wheel nuts on trucks and buses a
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62 Introduction A basic ergonomic p
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64 Handle design The handle of a ha
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66 Arteries Veins (superficial) Vei
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68 Handle size Since a tool handle
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70 However, if the texture is too c
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72 Bibliography Chaffin, D.B. and A
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74 Fig. 3.3 The same feed force app
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76 Pushing and pulling Pushing a to
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78 the object, the shape of the obj
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80 Safety factor a 2 Frequency of t
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82 Comments for different tool type
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84 The trigger is either operated b
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86 used in one handed operations. T
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88 Weight The weight of a hand-held
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90 stability of grip, the center of
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92 Temperature Hand-held power tool
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94 To ensure physical comfort durin
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96 Score 40 30 20 10 0 Bibliography
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98 the dynamic properties of the ma
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100 High motor power and fast clutc
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102 Score 40 30 20 10 0 shock react
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104 piezo-electric crystal. When th
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106 EN 50144 and EN 60745. Both ISO
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108 hole of the wheel are wider tha
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110 In the GTG 40 grinding machine,
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112 RRH machines serves two functio
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114 be noted that declared values b
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116 Noise Noise was the first envir
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118 value for 8 hours’ exposure t
Page 121 and 122: 120 We can start by looking at the
Page 123 and 124: 122 This is done with a minimum inc
Page 125 and 126: 124 microphones at a distance of 1
Page 127 and 128: 126 coated with dust or damaged by
Page 129 and 130: 128 This method has not been used b
Page 131 and 132: 130 tool cabinet. Many workplaces h
Page 133 and 134: 132 lubrication. Made from a compos
Page 135 and 136: 134 Grinder GTG 40 F085 The relevan
Page 137 and 138: 136 were simulated by fitting a whe
Page 139 and 140: 138 Drill LBB 26 EPX-060 The releva
Page 141 and 142: 140 applied to the center of the dr
Page 143 and 144: 142 Chipping hammer RRF 31 The rele
Page 145 and 146: 144 SHOCK REACTION There are no sho
Page 147 and 148: 146 Riveting hammer RRH 06 The rele
Page 149 and 150: 148 WEIGHT The weight is 1.3 kg, sc
Page 151 and 152: 150 Screwdriver LUM 22 PR4 The rele
Page 153 and 154: 152 This gives a score of 9. In pra
Page 155 and 156: 154 Impulse nutrunner EP9 PTX80-HR1
Page 157 and 158: 156 Due to friction in the hydrauli
Page 159 and 160: 158 Electric nutrunner ETP ST32-05-
Page 161 and 162: 160 WEIGHT The electric nutrunner i
Page 163 and 164: 162 Angle nutrunner LTV 29 R30-10 T
Page 165 and 166: 164 operator equal to installed tor
Page 167 and 168: 166 Electric angle nutrunner Tensor
Page 169 and 170: 168 WEIGHT The electric nutrunner i
Page 171: 170 High torque nutrunner LTP 51 Th
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Ergonomics - Atlas Copco

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