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GB 28242-2012 English PDF

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GB 28242-2012: Screw presses -- Safety requirements
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Basic data

Standard ID	GB 28242-2012 (GB28242-2012)
Description (Translated English)	Screw presses -- Safety requirements
Sector / Industry	National Standard
Classification of Chinese Standard	J62
Classification of International Standard	25.120.10
Word Count Estimation	11,158
Quoted Standard	GB 150.1; GB 150.2; GB 150.3; GB 150.4; GB 2894-2008; GB/T 3766-2011; GB 4584; GB 5226.1-2008; GB/T 7932-2003; GB/T 15706.1-2007; GB/T 15706.2-2007; GB/T 16856.1; GB 17120; GB 17888.1; GB 17888.2; GB 17888.3; GB 17888.4; GB/T 19671; GB/T 24342; GB 26483
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 technical requirements for the safety screw press. This standard applies to friction screw presses, electric screw presses, hydraulic screw press, clutch screw press (hereinafter referred to as the press).

GB 28242-2012: Screw presses -- 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.
Screw presses.Safety requirements ICS 25.120.10 J62 National Standards of People's Republic of China Screw presses - 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

Foreword

This standard Chapters 5 and 6 are mandatory, the rest are recommended. 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. Qingdao Green forging Forging Machinery Co., Ltd., Jinan Foundry and Metalforming Machinery Research Institute Co., Ltd., Hubei Fusheng Forging Machinery Co., Ltd. Liaoyang Forging Machine. The main drafters of this standard. Xingji Bo, Ma Liqiang, Wu with students, Zhangyuan Liang, Liaogui Fang, Li Shujun, Liufeng Qin, Zhu Yuansheng, Liu Fenghua, Zhang Huade. Screw presses - Safety requirements

1 Scope

This standard specifies the technical requirements for safety screw press. This standard applies to friction screw presses, electric screw presses, hydraulic screw press, clutch screw press (hereinafter referred to as Presses).

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 150.1 pressure vessels - Part 1. General requirements GB 150.2 pressure vessels - Part 2. Materials GB 150.3 pressure vessels - Part 3. Design GB 150.4 Pressure Vessels Part 4. fabrication, inspection and acceptance GB 2894-2008 Guidelines for the use and safety signs GB/T 3766-2001 Hydraulic System General technical conditions (ISO 4413.1998) 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/T 7932-2003 Pneumatic system General technical conditions (ISO 4414.1998) 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/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 19671 Safety of machinery - hand control devices - Functional aspects and design principles (ISO 13851) GB/T 24342 Industrial machinery and electrical equipment protective earthing circuit continuity test specification GB 26483 mechanical presses noise limits

3 Terms and Definitions

And the following terms and definitions GB/T 15706.1 and GB 17120 apply to this document defined. 3.1 Dangerous hazard Potential source of harm. [GB/T 15706.1-2007, the definition 3.6] 3.2 Risk risk The probability of occurrence of injury and injury severity synthesis. [GB/T 15706.1-2007, the definition 3.11] 3.3 Danger zone dangerzone So that personnel exposed to dangerous machinery any space within and/or around. [GB/T 15706.1-2007, the definition 3.10] 3.4 Guard guard An integral part of the machine, for providing a physical barrier protection. [GB/T 15706.1-2007, the definition 3.25] 3.5 Protection safetydevice Outside guard safety device. [GB/T 15706.1-2007, the definition 3.26] 3.6 Slide stroke strokeofslide By the movement of the slider to the displacement of the upper limit position of the lower limit position. 3.7 Security Bar safetyscotch; mechanicalrestraintscotch When the press mold adjustment or repair, on the underside of the upper and lower molds or slider with the table plate to prevent accidental shift slider Dynamic and dangerous one pillar or stopper. Dangerous 4 presses 4.1 should be GB/T 15706.1 and GB/T 16856.1 provisions risk assessment. 4.2 hazard identification, hazard for foreseeable misuse (including presses use, adjustment, cleaning and maintenance) should be produced analysis. 4.3 to consider the risk of the press see GB/T 15706.1-2007 Chapter 4. 5 Safety requirements and/or measures 5.1 General Requirements 5.1.1 The press shall comply with the provisions of GB 17120. 5.1.2 In determining the press of a predetermined function, intended use, when life expectancy should be considered safety precautions. Press conditions required system Manufacture, installation, commissioning, maintenance, repair, storage, transport and use and are not dangerous. 5.1.3 should be possible to exclude or reduce risk through the design, alone or in combination include the following measures. --- Choose the appropriate design of the structure to avoid or reduce the risk; --- Reduce operator needs to enter the danger zone, to limit their risk. 5.1.4 By design danger can not be avoided or sufficiently limited, the security guards should be used for personnel protection. 5.1.5 the dangers and risks of certain inconveniences due to insufficient protection guard and remain shall inform the operator through effective manner. Such as Described in the instructions for use, should be set up warning signs "must wear helmets", "caution", "must take ear protectors" and security in the dangerous position Full signage. 5.2 Mechanical hazards and protective 5.2.1 easy to press the contact portions and components can cause personal injury shall have sharp edges, sharp corners, sharp edges, etc., in order to avoid puncture or pricks Danger. 5.2.2 slide stroke should be set upper limit and lower directions. 5.2.3 press unidirectional rotating parts, such as friction discs, etc. should turn directions. 5.2.4 press cushioning device should be set to prevent the occurrence of slider beam rigidity and body up to the upper limit when the brakes failed while Impact. 5.2.5 clutch screw press of the clutch and brake pressure air and liquid should meet the design requirements, in which the brake When the pressure is below a predetermined design value, the slider should not exercise. 5.2.6 slider row, in any position can brake and the slider can not occur with a rigid beam impact. 5.2.7 brake power brake should be used. 5.2.8 press should be set Safety Lock to prevent accidental movement of the slider and dangerous mold when adjustments or repairs carried out in the press, the Means should be used with the control system interlock. 5.2.9 Nominal force greater than 4000kN type forging presses should be set overload protection device. Type stamping presses can be excluded. 5.2.10 moment ejector means in the limit position, the movable plate (or moveable table) to exercise. Separate drive under the top feeder, when it Leaving the lower limit position, the slider can not be down. 5.2.11 may cause wound, inhaled or involved in dangerous moving parts and transmission should set the security guards. Crushing and/or shearing hazard exists between 5.2.12 moving parts and moving parts or moving parts and the stationary member, should take security Protective measures. 5.3 Security guards 5.3.1 safety guards for machinery or other dangers involved and set up, it should be done. Mechanical strength and stiffness --- meet the required reliable performance; --- Does not add any additional (eg caused by pinching, cutting, etc.) danger; --- Can be firmly and securely fixed. 5.3.2 Total Configuration Guidelines Presses should be based on their mode of operation, for dangerous working areas at least one suitable safety device to prevent the operator's hands Or other parts of the body unintentionally enter the work the danger zone. 5.3.3 guards Protective device is divided into fixed guards, interlocking movable guards and protective devices. Protective equipment shall comply with the GB/T 15706.2-2007 5.3 requirements. 5.3.4 safety device 5.3.4.1 Hands manipulation button Using both hands to manipulate buttons shall comply with GB/T 19671 of. 5.3.4.2 Optoelectronic protective devices Photoelectric protection device shall comply with the provisions of GB 4584. 5.4 steering control system Steering control system 5.4.1 press moving parts should function reliably, and ensure that all functions do not interfere with each other. 5.4.2 Setting control device should take into account the additional dangers posed by misuse, prone to misuse of a control device is designed to be test Consider fault tolerance. Because inadvertent or accidental prevent accidental touch control device caused the start. 5.4.3 Each "start" near the control device shall be provided with a "stop" control devices. Each operating position of the press shall be provided with emergency Stop devices. Emergency stop devices shall comply with the provisions of 10.7 GB 5226.1-2008. 5.4.4 operating system must be sensitive, reliable, joystick control force not greater than 50N, pedal operating force operating device shall not exceed 80N. 5.4.5 adjustment specification job specification and manipulation should be interlocked. 5.4.6 Manually operated foot manipulation and should be interlocked with the manipulation of the foot-operated switch hands should be keyed in. Treadle may not be used Automatic adjustment to work norms and work practices. 5.5 Electrical Hazards and Protection 5.5.1 shall comply with the provisions of GB 5226.1. 5.5.2 should prevent shock hazard and accident hazards. 5.5.3 Presses conductive cable should be connected reliably. Conductive area of the conductive cables and connections to the bearer of the current match and guarantee Good conductivity. 5.5.4 protective earthing circuit continuity should be consistent with GB 5226.1-2008 provisions in 18.2, according to inspection GB/T 24342 performed. 5.5.5 Presses and electrical connections should be reliable insulation. Insulation resistance test shall comply with the provisions of 18.3 GB 5226.1-2008. 5.5.6 The pressure test shall comply with the provisions of 18.4 GB 5226.1-2008. Function 5.5.7 Electrical equipment shall comply with the requirements of the press. Its test shall comply with the provisions of GB 5226.1-2008 in 18.6. 5.6 Hydraulic System 5.6.1 hydraulic system should be consistent with GB/T 3766-2001 4.3 requirements. 5.6.2 pipes and fittings materials selected should consider safety, preservation, and joints can not be exposed junction leakage. 5.6.3 pipeline should be set up safe, reasonable, in order to avoid vibration and impact, there should be a gap between the pipes. 5.6.4 within the entire operating cycle, the level should maintain a safe working height, and there is enough space for thermal expansion and air separation. 5.6.5 Pump drive motor should be exposed at the coupling has a safety guard. 5.6.6 When the hydraulic system pressure loss of normal may have unsafe, should set the alarm indication signal or signals in the system as well as Downtime. 5.6.7 hydraulic system accumulators shall comply with the provisions of GB 150.1 ~ 150.4. 5.7 pneumatic system 5.7.1 Pneumatic systems shall comply with the requirements of 4.3 GB/T 7932-2003. 5.7.2 system should overvoltage, loss of pressure and exhaust protective measures. There should be no piping leaks. 5.7.3 Control valves should be fail-safe measure. Electric control valve should be operated manually. 5.7.4 tank shall comply with the provisions of GB 150.1 ~ 150.4. 5.8 Noise 5.8.1 There should be no unusual press screams during the operation. 5.8.2 press machine idling noise level should not exceed the GB 26483 requirements. 5.9 work platforms, ladders, railings 5.9.1 When you need to enter the press when the ground height of 3m above operation, repairs and maintenance, should be set up work platforms, channel Order Ladders or ladders and guardrails. 5.9.2 In the entrance to the platform or ladder from the ground at least a 1m or more, should be set up with the press or with the main drive control system Interlocking guards, and set the appropriate warning signs. 5.9.3 Selection entering the facility shall comply with the provisions of GB 17888.1. 5.9.4 Working platforms and gangways shall comply with the provisions of GB 17888.2. 5.9.5 ladder and guardrails should be consistent with GB 17888.3 requirements. 5.9.6 Fixed ladders shall comply with the provisions of GB 17888.4.

6 Use Information

6.1 signs and symbols 6.1.1 Products should press mark (nameplate), including the following information. --- Name of the manufacturer; ---product name; ---Product number; --- Production date or date of manufacture; --- Product Code. 6.1.2 press lubrication points should be lubricated flag. 6.1.3 occur presses easy to dangerous parts should warn the operator's attention to the dangers safety signs, such as "pay attention to safety," "prohibit climbing Landing "," must take the headset, "" must wear helmets, "" Beware of falling "and so on. 6.1.4 front and back surfaces of the slider should be painted in black and yellow stripes or yellow interval safe color. 6.1.5 Warning signs should comply with the provisions in 4.2 of GB 2894-2008. Flag Machine Tool 6.1.6 Electrical equipment shall comply with GB 5226.1-2008 in chapter 16. 6.1.7 press logo should be used anti-corrosion materials production, installation firm, the content should remain visible. 6.2 User's Guide Instructions regarding safety requirements should be comprehensive, specific, clear danger to remind the operator may face in the operation, And there are preventive measures and protection methods described. Instructions Security reads as follows. a) presses, transportation, handling and storage of information. --- Presses safe storage conditions; --- Press size, quality specifications; --- Press handling instructions; --- Presses, packaging and packaging graphic mark. b) the delivery of the commissioning of the press information. --- Press fixed and basic requirements; --- Assembly and installation requirements; --- Connection Description Presses power source (including the requirements of the grounding device). c) information press itself. --- Noise limit data; --- Description of each and charts. d) the use of press information. --- Preparation before use and inspection; --- Safety and security, warning signs and instructions; --- Run during operating procedures, precautions and preventive measures; --- Operation and possible faults Remedy. e) press service information. --- Proposed service personnel safety technical requirements.

7 Safety requirements for inspection

7.1 inspection method 7.1.1 Test presses safety requirements by the following manner. a) by visual inspection to verify the press and the provisions of section meets the requirements; b) through performance checks/tests to verify the functionality of presses and regulations component meets the specified requirements; c) to measure functional test presses and regulations component meets the specified requirements by checking instrument; d) by drawing/calculation to verify the functionality of presses and regulations component meets the specified requirements. 7.1.2 Test Method presses safety requirements in accordance with Table 1 specifies one or more methods of inspection. Test 7.2 Safety requirements and/or measures Chapters 5 and 6 of the safety requirements and/or measures of test methods in Table 1. Table 1 This standard clauses Testing method Head detectable amount of performance inspection and test drawings/calculation 5.1 √ √ √ √ 5.1.1 √ √ √ √ 5.1.2 √ √ 5.1.3 √ 5.1.4 √ √ 5.1.5 √ 5.2 √ √ √ √ 5.2.1 √ √ 5.2.2 √ √ 5.2.3 √ 5.2.4 √ √ 5.2.5 √ √ 5.2.6 √ 5.2.7 √ 5.2.8 √ √ Table 1 (continued) This standard clauses Testing method Head detectable amount of performance inspection and test drawings/calculation 5.2.9 √ √ 5.2.10 √ 5.2.11 √ √ 5.2.12 √ √ 5.3 √ √ √ 5.3.1 √ √ 5.3.2 √ 5.3.3 √ √ 5.3.4 √ √ 5.3.4.1 √ √ 5.3.4.2 √ 5.4 √ √ √ √ 5.4.1 √ 5.4.2 √ √ 5.4.3 √ √ √ 5.4.4 √ 5.4.5 √ 5.4.6 √ √ 5.5 √ √ √ √ 5.5.1 √ √ √ √ 5.5.2 √ √ 5.5.3 √ √ 5.5.4 √ 5.5.5 √ 5.5.6 √ 5.5.7 √ 5.6 √ √ √ √ 5.6.1 √ √ √ √ 5.6.2 √ √ 5.6.3 √ √ √ 5.6.4 √ √ √ 5.6.5 √ √ 5.6.6 √ √ Table 1 (continued) This standard clauses Testing method Head detectable amount of performance inspection and test drawings/calculation 5.6.7 √ √ 5.7 √ √ √ √ 5.7.1 √ √ √ √ 5.7.2 √ √ √ 5.7.3 √ √ 5.7.4 √ √ 5.8 √ 5.8.1 √ 5.8.2 √ 5.9 √ √ √ √ 5.9.1 √ √ 5.9.2 √ √ √ 5.9.3 √ 5.9.4 √ √ √ 5.9.5 √ √ √ 5.9.6 √ √ √ 6.1 √ √ 6.1.1 √ 6.1.2 √ √ 6.1.3 √ 6.1.4 √ √ 6.1.5 √ √ 6.1.6 √ √ 6.1.7 √ √ √ 6.2 √ Note. "√" indicates test methods may be employed. 2102- Rights Proprietary Rights Reserved ISBN. 155 066 · 1-45299

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