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GB 28243-2012: Hydraulic press brakes -- Safety requirements
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Basic data
Standard ID: GB 28243-2012 (GB28243-2012)
Description (Translated English): Hydraulic press brakes -- Safety requirements
Sector / Industry: National Standard
Classification of Chinese Standard: J62
Classification of International Standard: 25.120.10
Word Count Estimation: 32,311
Quoted Standard: GB/T 2893.2; GB 2894; GB/T 3766; GB 4208; GB 4584; GB 5226.1-2008; GB 7247.1-2001; GB/T 7932; GB/T 8196; GB 12265.3-1997; GB/T 14775; GB/T 14776; GB/T 15706.1-2007; GB/T 15706.2-2007; GB 16754-2008; GB/T 16855.1-2008; GB/T 16856.1; GB 17120; GB 17888.1; G
Regulation (derived from): Announcement of Newly Approved National Standards No. 1 of 2012
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This Chinese standard specifies the hydraulic plate bending machine safety requirements and measures. This standard applies to cold metal or partly metal hydraulic plate bending machine (hereinafter referred to as bending machine), also apply to other mat
GB 28243-2012: Hydraulic press brakes -- Safety requirements
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Hydraulic press brakes.Safety requirements
ICS 25.120.10
J62
National Standards of People's Republic of China
Hydraulic plate bending machine - Safety requirements
Issued on. 2012-03-09
2013-01-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Introduction Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions 2
4 3 important risk
5 Safety requirements and/or protective measures 5
6 Safety requirements and/or protective measures to verify 17
7 information 23
Calculation Appendix A (normative) minimum safety distance of 25
Annex B (informative) bender stop response time measurement 27
Annex C (informative) Manual feeding bender side security 28
Foreword
The standard Chapter 3, Chapter 4, Appendix B and Appendix C are recommended, the rest are mandatory.
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
The standard proposed by China Machinery Industry Federation.
This standard by the National Forging Machinery Standardization Technical Committee (SAC/TC220) centralized.
This standard was drafted. Foshan Nanhai ACL Machine Co., Ltd., Nanjing Eston Digital Technology Co., Ltd., Jinan Casting forging press
Mechanical Research Institute Co., Ltd., Jiangsu strength Forging Machine Co., Ltd., Shanghai Machine Tool Plant punching, Anhui Sanli Machine Tool Manufacturing Co., Ltd.
The main drafters of this standard. Zhou Jianjun, Wu Bo, Ma Liqiang, Luo Guilin, Fu Gang, Bao Dao, Yang Minzhe, its king, Chen Jin.
Hydraulic plate bending machine - Safety requirements
1 Scope
This standard specifies the hydraulic plate bending machine safety technology requirements and measures.
This standard applies to cold metal or material partly of metal hydraulic plate bending machine (hereinafter referred to as bending machines), also applies to
The same processing technology to other materials (such as cardboard or plastic) of the bending machine. This standard also applies to the accessory device bender.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 2893.2 Graphical symbols - Safety colors and safety signs - Part 2. Design principles for product safety labels (ISO 3864-2)
GB 2894 Safety Signs and use guidelines
GB/T 3766 Hydraulic System General technical conditions (ISO 4413)
GB 4208 housing protection (IP Code)
GB 4584 presses photoelectric protection device technology
GB 5226.1-2008 Safety of machinery - Electrical machinery and electrical equipment - Part 1. General requirements (IEC 60204-1.2005)
GB Safety of laser products - Part 1. Equipment classification, requirements and user guide (IEC 60825-1.1993)
GB/T 7932 pneumatic systems General technical conditions (ISO 4414)
GB/T 8196 mechanical safety devices fixed and movable guards design and manufacture of general requirements (ISO 14120)
GB 12265.3-1997 Safety of machinery to avoid crushing of parts of the human body minimum spacing (EN349.1993)
GB/T 14775 manipulator General ergonomics requirements
GB/T 14776 Ergonomic design principles job size and value (DIN33406)
GB/T 15706.1-2007 Safety of machinery - Basic concepts, general principles for design - Part 1. Basic terminology, methodology (ISO 12100-
1.2003)
GB/T 15706.2-2007 Safety of machinery - Basic concepts, general principles for design - Part 2. Technical principles (ISO 12100-2.
2003)
GB 16754-2008 Safety of machinery - Emergency stop design principles (ISO 13850.2006)
GB/T 16855.1-2008 Safety of machinery - Safety-related control system components - Part 1. General principles for design (ISO 13849-1.
2006)
GB/T 16856.1 Safety of machinery - Risk assessment - Part 1. Principles (ISO 14121-1)
GB 17120 Metalforming machinery - Safety requirements
GB 17888.1 Safety of machinery stationary facilities - Part 1. Choice of fixed means of access between two planes
(ISO 14122-1)
GB 17888.2 Safety of machinery stationary facilities - Part 2. Working platforms and channels (ISO 14122-2)
GB 17888.3 Safety of machinery stationary facilities - Part 3. Stairs, steps and guardrails (ISO 14122-3)
GB 17888.4 Safety of machinery stationary facilities - Part 4. Fixed ladders (ISO 14122-4)
GB/T 18153 Safety of machinery - accessible surface temperature determine the thermal surface temperature limit of Ergonomics data (EN563)
GB 18209.2 Electrical safety of machinery - Indication, marking and operation - Part 2. Requirements for marking (IEC 61310-2)
GB/T 18831-2010 mechanical interlock design belt guard and selection principles (ISO 14119.1998
Amd.1.2007)
GB/T 19671-2005 Safety of machinery - hands control devices - Functional aspects and design principles (ISO 13851.2002)
GB/T 19876-2005 Safety of machinery and parts of the body close to the speed of the positioning of protective equipment (ISO 13855.2002)
GB 23821 Safety of machinery - Safety distances to prevent danger zones being reached on the lower limbs (ISO 13857)
GB 24388 bending machine noise limits
3 Terms and Definitions
GB/T 15706.1, and the following terms and definitions GB/T 15706.2 and GB 17120 apply to this document defined.
3.1
Slider beam
Equipped with reciprocating die bender working parts.
3.2
Blanking blanking
One photoelectric protection device optional features, you can make part of the detection area protector is suppressed (ie, become blind spot detection,
Partial light beams is disabled).
3.3
Automatic cycle cycle-automatic
Operating cycle can be repeated continuously or intermittently operating mode. In this mode, after bending machine start all functions without manual intervention
The case is completed.
3.4
Duty cycle cycle-operating
Slider from the starting point of the cycle (usually top dead center) to the lower dead point and then loop back to the end of movement (usually top dead center) is a complete
Cycles. Duty cycle comprising the motion during all operations.
3.5
Single cycle cycle-single
Each operating cycle of the slider must be forced by the operator to start operating mode.
3.6
Dead deadcentres
Slide limit position trajectory. Acting on the bending machine, slide trajectory of the most extreme position, known as the bottom dead center (BDC);
The most slider trajectory extreme position, known as the top dead center (TDC); under-acting bending machines, dead contrary to the above.
3.7
Hydraulic plate bending machine hydraulicpressbrake
By hydraulic transmission to transfer energy to the movement of the mold parts, along a straight line in the narrow mold plate will bend forming a machine.
3.8
Limited motion control device limitedmovementcontroldevice
Jog means inchingdevice
The itinerary bending machine moving part is limited within a certain range of the control device, so as to minimize the risk. Only intermittently
Operation of the device, will have a further movement.
[GB/T 15706.1-2007, the definition 3.26.9]
3.9
Surveillance monitoring
A security feature if a component (element) is no longer able to exercise its function due to changes in processing conditions or make further worked
Cheng will be dangerous when issuing safety information.
3.10
Inhibition muting
By the safety control system components on one or more security features automatic stay temporarily.
3.11
The total response time to stop overalresponsetime
Stop system performance overalsystemstoppingperformance
It refers to the protection device to start from the beginning of the dangerous movement to stop the machine into a safe state or elapsed time.
3.12
Redundancy redundancy
Multiple devices or systems, for failure to ensure that all the way, another way to effectively perform the required function.
3.13
Support valve restraintvalve
Prevent the slider dropped by gravity hydraulic valves.
3.14
Single stroke function singlestrokefunction
A slide movement restriction of the duty cycle characteristics, even when the stroke control means (such as a foot switch) is always in the operating position, the slider only
Capable of moving a work cycle.
3.15
By acting bending machine up-strokingpressbrank
When working stroke bending machine slide upward movement (and acting on the bending machine opposite).
4 important risk
Press important risk Listing 4.1 GB/T 16856.1 risk assessment results are shown in Table 1.
4.2 Risk assessment includes risk of entering the danger zone operators and other personnel produced, taking into account the intended use conditions (see
Possible danger of 15706.1-2007 5.3) under GB/T .
4.3 shall be according to GB/T 16856.1 other risk analysis and risk assessment.
Table 1 Important hazards and protective measures in hazardous areas
No. Danger area
GB/T 15706.1-
Section 2007
Protective measures (the present standard
Quasi corresponding section)
1.1
1.2
1.3
1.4
1.5
Mechanical hazards
Dangerous machine parts or workpieces produced
Internal accumulation of mechanical energy generated
Danger, such as.
--- Elastic member (spring);
--- High-pressure liquid and gas
Risk of crushing
Cut dangerous
Cutting or severing hazard
Dangerous wound
Or inhalation hazard involved
Operating danger zone.
--- Between the upper and lower molds;
--- Bending machine moving parts and a fixed member;
--- Move the workpiece;
--- Between the workpiece and other parts of the tilt;
--- Positioning or movement of the metering device (such as a gauge or pusher
Means);
--- Campaign material holding means;
--- Guard;
Operating outside the danger zone.
--- Danger zone of moving objects
4.2 5.1,5.3 ~ 5.5
4.2 5.8.3
4.2.1
5.3 to 5.6,
7.1.2h) ~
7.1.2i)
Table 1 (continued)
No. Danger area
GB/T 15706.1-
Section 2007
Protective measures (the present standard
Quasi corresponding section)
1.6 Shock hazard
Electrical, hydraulic and pneumatic equipment moving parts;
Drive motors and other mechanical devices;
Mechanical handling means
4.2.1 5.6
1.7 high pressure fluid ejection hazard hydraulic system, pneumatic system 4.2.1
5.2.2.4,
5.8.3
2 electrical hazards
2.1
Charged with human body contact (direct
contact)
Electrical Equipment
2.2
Since the human body and under fault conditions becomes
Into contact with live parts of the body (indirect
contact)
Electrical Equipment
4.3 5.8.1
3 thermal hazards
3.1
Thermal hazards to persons may reach production
Health burns and scalds
Hydraulic System Components 4.4 5.8.2
4 noise hazard
4.1 dangerous noise can cause hearing damage risk of hearing damage exists bender area 4.5 5.8.5
5 radiation risks
5.1 Laser laser bending machine exists risk area 4.7 5.8.6
Danger of losing sight 6 Mechanical design ergonomic ergonomics principles arising
6.1
Due to unhealthy posture or too
Risk of fatigue caused
6.2
No reasonable considering the hand - arm, feet - leg
And dangerous result
6.3
Unreasonable local illumination generated
Danger
6.4
Human error, human habits produce
Danger
6.5
Since the manually operated means unreasonable
Design, production and installation location and identification
Students dangerous
6.6
Since the display device unreasonable design
Or hazardous to the installation position generated
Working position, control, adjustment, maintenance and manipulation of any
HE area
4.9
5.8.8
5.8.8.2,
7.2.2d)
5.4.5.1,
5.4.5.4,
5.4.3,5.4.6
5.4.5,
5.8.8.2
5.8.8.2
Table 1 (continued)
No. Danger area
GB/T 15706.1-
Section 2007
Protective measures (the present standard
Quasi corresponding section)
7 Unexpected start, unexpected overrun/overspeed
7.1 control system failure/error command
7.2 Any recovery after interruption of energy supply
7.3 outside interference of electrical equipment
7.4 Software Error
7.5 The operator of human error
8 power supply failure
9 Control circuit failure
Molds and related areas.
--- Between the upper and lower molds;
--- Bending machine moving parts and a fixed member;
--- Move the workpiece;
--- Between the workpiece and other parts of the tilt;
--- Positioning or movement of the metering device (such as a gauge or pusher
Means);
--- Campaign material holding means;
--- Guard
4.9
5.2 to 5.5
5.4.1.1
5.4.1
5.4.2,
5.3.12.1f)
5.3,7.2.2
5.4.1.1
5.2 to 5.5
10 4.9 5.3.24 mold installation errors
During operation of the sudden collapse of the (off
Cracked or broken)
Mechanical, electrical, hydraulic and pneumatic equipment
12 falling or flying objects or liquid machine components, workpieces and mold
13 machine instability/over sloping ground around the bending machine
4.2.2
5.2.2.4,
5.2.2.7,
5.2.2.8,
5.2.2.9,
5.4.4
5.3.24
5.8.4,
7.2.2d)
Slipping personnel, trip or fall (and
Machine-dependent)
All related operating height;
Ground around the bending machine
4.10 5.7
5 Safety requirements and/or protective measures
5.1 General
Bending machine design, manufacturing should be consistent with the provisions of GB 17120, and also in accordance with the general GB/T 15706.1 not covered by this standard
It is considered dangerous.
5.2 Basic design requirements
5.2.1 slider prevent accidental fall (acting on the bending machine)
5.2.1.1 should take one of the following measures to prevent accidents during operation of the slider whereabouts danger (gravity than 150N) arising from.
--- Mechanical support means;
--- Hydraulic support means;
--- Only a combination of hydraulic support means with a mechanical valve support means support.
When the operator may enter the danger zone die, whenever slider to stop supporting means should be able to work automatically.
5.2.1.2 When the mechanical support device is not used but there is a risk of falling accidents slider, one of the following shall be a hydraulic support device consists of.
a) the use of two separate support slider or the return of the cylinder, each cylinder support means having the ability to support quality slider.
b) operate independently of each cylinder set two series of hydraulic valve support (ie, the cylinder should be set for each individual operation redundancy support
valve). Hydraulic valve should be used to support other forms of welding flange or rigid pipe and the cylinder port connection, should not take the pressure mounting, cement circle
Or other similar methods.
5.2.1.3 If the bending machine is equipped with a permit only one of the following ways of working hydraulic valves or mechanical support device support.
--- Automatic operation;
--- Fixed enclosing guards;
--- Only low closing speed - the dynamic control device.
5.2.1.4 whether the system should automatically detect the correct operation of the support means, and the system failure should not travel bending machine operation.
5.2.2 General requirements for hydraulic and pneumatic systems
5.2.2.1 Hydraulic and pneumatic systems should be consistent with GB/T 3766 and GB/T in 7932 safety requirements.
5.2.2.2 should be configured with a filter and pressure regulator valve.
5.2.2.3 should be designed to ensure that pressure is maintained within the allowable range.
When subjected to pressure 5.2.2.4 transparent appliance (such as glass, plastic) without affecting the visibility of the case, it should be protected against accidental damage
Injury to personnel.
5.2.2.5 All piping, pipe fittings, gas-liquid passage, fuel tank and hole machining burrs and debris should be removed.
5.2.2.6 pipeline should keep the connection open, should take measures to prevent damage due to thermal expansion, rigid conduit should be spaced a fixed support,
To prevent vibration or movement. Avoid hose winding, irregular distortions.
5.2.2.7 pressure drop may result in unexpected slider dangerous actions should not be used at the hose; pipes and connections should be able to prevent pressure drops.
5.2.2.8 valve should not rely solely on the connecting pipe support.
5.2.2.9 Control valves and other control or display components (such as pressure regulators, pressure gauges, etc.) should be installed in easily accessible and easily damaged place.
Action 5.2.2.10 manual valve or mechanical valve (as opposed to motorized control valve) should be flexible and reliable recovery, such as when the relief valve operating member,
Valve automatically reply to a safe location.
5.2.3 Hydraulic System
5.2.3.1 As with controlled gravity fall fast closing the mold for the inner support cylinder block all hydraulic oil should flow through the main control valve
Or with valve redundancy and monitoring system.
5.2.3.2 When a pressure mechanism stops working, the energy accumulator hydraulic system comprising an accumulator is not allowed to produce any dangerous move
For, should allow fluid pressure drop, if not possible, the circuit should be equipped with a manual pressure relief valves, and comply with the relevant provisions of the accumulator required
Other devices (such as safety valves and pressure gauges, etc.), and should be clearly labeled with the danger warning signs.
5.2.3.3 hydraulic circuit system should be used to protect the safety valve. Use tools to adjust the safety valve and the safety valve set pressure not
10% of the maximum working pressure of the system should be higher.
5.2.3.4 for acting on the bending machine, in order to avoid accidental pressure surge damage caused by the lower chamber of the cylinder should be used to set up a
Valve cylinder lower chamber. The valve should belt locking device (such as seals) to prevent unauthorized adjustments. Set pressure valve should be at least higher than the Department
The system maximum working pressure of 10%.
5.2.4 Electrical System
5.2.4.1 bending machine electrical equipment shall comply with the provisions of GB 5226.1. Such as power, environment and working conditions differ from the actual
GB 5226.1-2008 specified in 4.3 and 4.4, the producer and the consumer should be resolved through consultation.
5.2.4.2 should belong to stop category 0 stop (see GB 5226.1-2008 of 9.2.5.4), the emergency stop should be able to stop all dangerous actions (such as
Slider back gauge, care and other materials).
5.2.4.3 hand control devices shall comply with GB/T 19671 of.
The minimum degree of protection 5.2.4.4 operator panel and suspended from the bending machine control device is IP54 (see GB 4208).
5.2.4.5 control device housing protection rating of IP54 (see GB 4208).
5.2.4.6 In addition to neutral and protective conductor, the other wire identification shall comply with GB 5226.1-2008 in 13.2.4.
5.2.4.7 stop - motion control device connected to the operation section, inching devices and control systems between should not rely on a relay. Should not be short-circuited
Accidental starting.
5.3 Mechanical hazards danger zone
5.3.1 General requirements
Bending machine operating hazardous area mainly positive bending machine molds and related areas, such as sports care feeding, movement and tilt gauge work
Member should take appropriate protective measures to prevent the risk.
5.3.2 Security guards
Designers, manufacturers and suppliers on the basis of a serious risk of considering bending machine and the operating mode selected on the line with GB/T 15706.1
Can risk and GB/T 15706.2 specified to minimize safety device for operator......
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