GB 28760-2012Tube bending machine - Safety requirements (English PDF)

1.6 Shock hazard Projection hazard

1.9 high pressure fluid jet (ejection risk) Boom, and the corresponding region of the mold.

--- between the mold;

--- between the mold and the workpiece;

--- between the workpiece and the member;

--- between the moving member and the fixed member;

--- moving member between the moving member;

--- the workpiece and the auxiliary means, such as child care material, Gauge, loading and unloading mechanism and the like;

--- falling of the workpiece or movement of workers Caused by dangerous pieces Electrical, hydraulic, pneumatic device motion member, and The motor and drive mechanism, a mechanical actuating apparatus Hydraulic system 4.2.1.

5.2 to 5.5 5.2.1.1,5.2.1.2 5.3.2 ~ 5.3.7

5.2 to 5.5 5.2.7.5,5.2.7.7

2 electrical hazards

2.1 Human body part in contact with live (direct contact)

2.2 Man and insulation failure is charged with A contact electrode (indirect contact) Electrical Equipment 4.3 5.8.1

3 thermal hazards

3.1 By a possible contact due to burns and scald The hydraulic system components Elbow lead From a workpiece or component 4.4 5.8.2

4.1 cause hearing impairment (deafness) Bender existence of any hearing damage Area 4.5

5.8.5 TABLE 1 (cont.) No. dangerous hazardous areas GB/T 15706.1-2007 Corresponding clauses Protective measures This standard corresponding reg Ignore ergonomics in Mechanical Design The risk arising from the principle of learning

5.2.1 Boom, cars and other moving parts feed

5.2.1.1 bender boom, feed overtravel car out of control or are moving at high speed and endanger the mechanical impact caused by the operator Personal safety, electrical control system, hydraulic system failure will result in failure described above; out of control when the rotary arm returns the operating person being adjusted or Members may be dangerous, so, we shall have the following precautions.

a) a reliable boom (return to the initial position) to prevent extrusion of personnel security measures;

b) providing a holding means (for car chucks);

c) providing a mechanical limiting means (to feed the car).

5.2.1.2 boom (return) security must be at least one of the following.

a) mechanical, electrical safety barrier. telecommunication means by a mechanical shutter trigger command to stop the boom, is mounted on both sides of the boom or the boom return Inner surface, so that the shutter is triggered during operation of the person in the danger zone to stop the boom;

b) a pressure-sensitive pad boom entering the danger zone, to prevent entry into the danger zone (see claim in GB/T 15706.2-2007 of 5.2.5.2);

c) photoelectric protection device. During the staff shall enter the danger zone and shall comply with the provisions of GB 4584.

5.2.1.3 main cylinder control circuit using reliable measures to prevent accidental overtravel boom, in conjunction with the unloading pump boom reliably stopped.

5.2.1.4 feed trolley in longitudinal limit stop position is set dead iron (with buffer means), when the feed car accident overtravel limit position Forced stop, in the extreme position limit switch may also be fed together form a reliable stop the car.

5.2.2 gripping the tubular member Bending machine with a feed carriage during operation should ensure that the collet clamp tube trolley reliable and effective. The maximum clamping force should satisfy tube Will not fall when the tube is in the maximum load torque; or a control signal when the power interruption, the jaw locking means of hydraulic pressure or mechanical self-locking security continue Tube clamping valid.

5.2.3 loading or unloading mechanism When the bending machine with feeding or discharging mechanism shall comply with design GB 4053.3 and GB/T 8196 the fence, comprising.

a) a fixed fence;

b) activities interlocking fence.

5.2.8 Electrical System

5.2.8.1 Electrical system design should meet the requirements of GB 5226.1.

5.2.8.2 Emergency Stop function should belong to the Safe Stop Category 0 (see

9.2.5.4 GB 5226.1-2008 in). After the emergency stop should stop package Elbow including, feed, clamping, and the like all having a core into the dangerous operation.

5.2.8.3 electrical cabinet door interlocks should door off. Load detecting means for each phase conductor

5.2.8.4 three-phase AC induction motor should be connected through the overload protection, the device sent messages when overload operation Alarm signal.

5.2.8.5 car should be equipped with electrical feed axis over-travel protection measures and ensure overstroke occurs, the operator and not bending machine-made To hurt, electrical over-travel protection is not a substitute mechanical over-travel protection.

5.2.8.6 movement controller should have the function of stopping.

5.2.8.7 plurality of different operating voltages when the conductor traces on the same channel (e.g., conduit, pipe or cable down trough means), both wires Insulation should meet the highest voltage requirements.

5.2.8.8 protection level operator interface and control apparatus is suspended on a bending machine is at least IP54.

5.2.8.9 control means protection of the enclosure is at least IP54.

5.2.8.10 identify and determine the protective conductor should be GB 5226.1-2008 selection of 13.2.2. Other conductors should identify GB 5226.1-2008 selected as specified in

5.2.9 software functional requirements It will not cause damage to the machine when

5.2.9.1 bending machine operating software should ensure that work bender.

5.2.9.2 Automatic tube bending machine cycle during operation should always be effective in clamping (or gripping) condition.

5.3 Human error, human habits

5.4 Since the manually operable means unreasonable Design, installation and uncoordinated

5.5 Unreasonable design or installation display Equipment Operating position, control, operation, adjustment, Maintenance and any other area 4.9 5.8.8

5.3.7 Other requirements

5.3.7.1 bender bending mold body, the clamping block guide (wheel), the mandrel and the like should be locked in a convenient and reliable for mold while ensuring the work Process does not produce as loosened or disengaged, to ensure that a damaged part or a case where power interruption nonhazardous.

5.3.7.2 all fasteners on the bending machine, in particular a fastening nut or the like and important parts of the force (e.g., mandrel) may produce vibrations should Can reliably lock, or a corresponding locking measures. Material holding means

5.3.7.3 bending machine should ensure reliable, material holding means is adjusted, the lifting can be reliably locked in the maximum and minimum bend Diameter can remain active, do not cause off the tube during operation.

5.3.7.4 bending machine should be suitable for lifting the box, transportation, lifting should be clearly marked with the center of mass marked on the package and, in the lifting process Instability should crates, scattered off the like.

5.3.8 Safety colors and sa...

6.2 Electrical equipment external interference 6.3

6.5 software error

6.6 operator error generated Power supply failure 7

8 control circuit fault

9 indicates an error

Molds and respective areas.

--- between the workpiece and the die and components;

--- stationary member and moving member between;

--- between the moving member 4.9 5.2.1,5.4.4 5.4 5.4.1 5.4.1 5.2.9 5.3 5.4.1.2

5.2 to 5.4 5.3.9 10 during operation of the brake a mechanical, electrical, hydraulic, pneumatic equipment 11 drops, flying objects or liquid discharge machine parts, molds, workpiece 12 buckling/bending machine excessively inclined Zhou Bian region 4.2.2 5.2.8.2,5.4.4.1 5.2.7.5,5.2.7.7 5.8.4 13 slip, fall or drop The operator height operation, maintenance, adjustment Benders and other Zhou Bian areas 4.10 5.7

5 safety requirements and protective measures

5.1 General This standard relates to a bending machine comprising a small normal large mechanical bending machine, hydraulic bending machine, CNC bending machine, a small radius bending machine Wait. Bending machine design, manufacture should meet the requirements of GB 17120. Methods to eliminate or reduce the risk of serious risks with appropriate measures in Table 1.