GB 16454-2008Sawing machines for metal cutting -- Safeguarding specifications (English PDF)

4.1 Danger analysis and risk evaluation shall be conducted on sawing machines in

accordance with the provisions of Chapter 5 of GB/T 15706.1-2007 and GB/T 16856.1.

Identify and evaluate the dangers of sawing machines.

Note. for the dangers not involved in this Standard, safety measures shall be taken in

accordance with relevant provisions of GB/T 15706.2.

4.2 During danger analysis, special attention shall be paid on the dangers caused by the

operators and other personnel's misuse, including.

— operating period of sawing machines;

— adjustment, cleaning and maintenance periods of sawing machines.

4.3 Major dangers of sawing machines

4.3.1 Mechanical danger

4.3.1.1 The danger of squeezing or cutting caused during clamping the work-piece or

changing the cutting tools.

4.3.1.2 The danger of squeezing between saw frame and operating vise, saw frame and

working bench, saw frame and upright rod, saw blades box and operating vise or upright

rod, saw arm and operating vise.

4.3.1.3 When saw frame, operating vise, saw blades box, saw arm and other parts are

lifted or shifted, the danger of cutting or squeezing between these parts and positioning

surface.

4.3.1.4 The sharp edges, sharp points and openings among components of sawing

machines that may cause cutting dangers to operators.

4.3.1.5 If the operators touch the working cutting tools with hands, it may cause cutting

dangers.

4.3.1.6 When the operators operate machines manually (such as during loading,

disassembling work-piece or measuring), if they are close to rotating cutting tools, it may

cause winding dangers.

4.3.1.7 Exposed gear, belt pulley, belt etc. that are easy to cause winding dangers.

4.3.1.8 When the units are shifted, exposed wires (turns), hydraulic pipes, cooling water

pipes etc. that may cause winding dangers due to the inappropriate fixing measures.

4.3.1.9 It may cause inhaled or involved danger between high rotating cutting tools and

4.3.5 Dangers caused by interrupt of energy supply, damage of components and other

dysfunctions

4.3.5.1 The accidental electricity interruption may cause work-piece falling.

4.3.5.2 If the cutting tools broke or crack, the fragments may burst out and cause dangers.

4.3.5.3 The accidental burst of hydraulic pipe may cause emission of oil fluids.

4.3.5.4 The accidental activation of mobile components and uncontrolled movement.

4.3.5.5 Mobile components stop and are blocked.

4.3.5.6 Dysfunctions of protective device.

4.3.5.7 Mistakes in motor program caused by assembling error of control elements may

cause dangers.

4.3.5.8 Misdirection of machine running may cause dangers.

4.3.6 Dangers caused by mistakes of safety measures, incorrect installation of safety

devices or incorrect positioning

4.3.6.1 Loose and non-durable guard structure or too large openings may cause dangers.

4.3.6.2 Improper design of guard structure may cause dangers, for example, it may block

the sight or cause additional extrusion or cutting area.

4.3.6.3 Improper limiting position of guard device or non-effective limiting may cause

dangers.

4.3.6.4 Unreliable interlocking device may cause dangers.

4.3.6.5 Vague (uneasy to be identified) signs or improper distribution of signs on start and

stop devices may cause faulty operations and dangers.

4.3.6.6 Dysfunctions of start and stop devices caused by circuit faults may cause dangers.

4.3.6.7 There is no safety signal and signal device on sawing machines, or safety signals

and signal devices are not easily understood. It may cause dangers.

4.3.6.8 There is no safety signal and warning device on sawing machines, or safety signals

are not easily understood and warning devices lose efficacy. It may cause dangers.

4.3.6.9 Dangers caused by that emergency-stop devices are not easily identified.

4.3.6.10 If the installation position of emergency-stop device is far away from danger area,

it may cause dangers.

obvious positions of sawing machines.

6.1 Horizontal band sawing machine and vertical band sawing machine

6.1.1 Protect the saw blades effectively and rationally. The protections for sawing wheel,

belt pulley and saw blade (excluding machining area) shall adopt fixed and/or adjustable

guard devices.

6.1.2 When horizontal band sawing machine and vertical band sawing machine are

operating, the guard for machining area shall be adjusted to keep the minimum safe

distance with work-piece, which means keeping as close as possible to work-piece.

6.1.3 For the cover fillet (or cushion block) used on work-bench of vertical band sawing

machine, the intervals on both sides of saw blade shall not more than 3mm.

6.1.4 Provide machining area equipment for the manual feed on vertical band sawing

machine, in order to avoid hands or fingers into machining area.

6.1.5 The feed sections on pulley-block type vertical band sawing machine shall be

equipped with limiting device; the device shall be reliable.

6.2 Circular sawing machine

6.2.1 Circular sawing machine shall be equipped with fixed and/or...

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