Some standard content:
1 General Provisions
National Standard of the People's Republic of China
Safety Regulations for Shearing Machinery
Safety regulations for shearing machinery UDC621.965:656
GB 6077-85
1.1 This standard is specially formulated to protect the safety and health of people in the process of shearing labor production and ensure the safe production of shearing equipment. 1.2 This standard applies to ordinary and specialized shearing machinery (hereinafter referred to as shearing machines) for shearing steel plates, profiles, steel and similar paper materials in mechanical and hydraulic shearing machinery.
1.3 This standard is the basic safety regulations for departments such as shearing machine design, manufacturing, use, maintenance and management. The local safety supervision department is responsible for supervising and inspecting the implementation of this standard. 1.4 The design and manufacture of shearing machines should be carried out in accordance with this standard and the current relevant technical conditions and other regulations, and must ensure safety, reliability and convenient operation and maintenance.
1.5 When conducting technical appraisal of newly designed and manufactured shearing machines, a conclusion must be drawn on their safety and reliability, and they can only be officially put into production after passing the appraisal.
The appraisal meeting must be attended by the shearing machine safety and technical management unit authorized by the national labor safety department and the local safety supervision department. 1.6 The shearing machine design and manufacturing unit must provide the user unit with safety and technical instructions (including safety and health measures to be taken during transportation, installation, use and maintenance, and a detailed list of wearing parts, etc.). 1.7 During the design, manufacture, use and modification of the shearing machine, if there is a conflict between safety and technical measures and economic interests, safety and technical requirements must be given priority.
2 Safety requirements for main structures and components
2.1 General requirements
2.1.1 Without affecting the function, the exposed surfaces of the frame and other parts and components shall not have dangerous parts such as jagged and sharp edges or protrusions.
2.1.2 The height from the operator's standing surface to the work surface should be convenient for operation, generally between 750 and 900 mm. 2.1.3 When the main load-bearing components, such as the frame, tool holder, and press device, are connected by welding, the structural strength requirements must be met. There must be no defects such as cracks, pores, slag inclusions, arc pits, etc. on the weld surface, and the internal quality of the weld should be checked. 2.1.4 The welding of the main load-bearing components must be carried out at an ambient temperature above 0°C, and the arc must not be struck in the non-welding area. Annealing treatment should be carried out after welding.
2.1.5 Bolts, nuts, pins and other fasteners used on important parts of the shearing machine must take strict anti-loosening measures. 2.2 Frame and tool holder
2.2.1 The frame structure must have sufficient strength, rigidity and stability. 2.2.2 The guide rail clearance between the frame and the tool holder should be easy to adjust and reliably locked. 2.2.3 The tool holder (referring to the moving tool holder or slider, hereinafter referred to as the tool holder) shall meet the rigidity, strength and compressive strength of the blade pressure surface specified in the design.
2.2.4 The actions of the tool holder operating mechanism shall be coordinated with each other, and all actions within the working specifications shall be smooth, flexible and reliable. When the clutch is disengaged, the tool holder shall reliably stay in the position specified in the design. In terms of design, the danger of the tool holder sliding on its own must be eliminated. 2.2.5 At least one reliable safety device must be installed at the dangerous parts of the tool holder and the pressing device. Issued by the National Bureau of Standards on June 6, 1985
Implementation on May 1, 1986
2.3 Pressing device
GB 6077-85
2.3.1 The shearing process must have a sequential action of pressing first and then shearing. There should be sufficient pressing force and a sufficient number of pressing feet, and the bottom surface should be flat and complete.
2.3.2For shearing machines with a shearing thickness of less than 6.3mm, the height of the pressure protection device must be adjustable, and the distance between the bottom surface and the workbench cannot exceed the thickness of the sheared steel plate + 8mm. 2.4 Material blocking device
2.4.1 The material blocking device (including the front and rear material blocking devices) should have a structure that blocks the material accurately and reliably, and is convenient and safe to feed. 2.4.2 The material blocking device should be convenient for shearing, and should be equipped with a rear material blocking retreat mechanism that can be smoothly removed without directly moving it by hand when the sheared material is stuck.
2.4.3 If necessary, the front material blocking device should be equipped with an angled material blocking device to facilitate shearing of workpieces with angles. 2.4.4 The material blocking device should be equipped with a scale or digital display mechanism that is easy to read. 2.5 Material supporting device
2.5.1 The shearing machine should be equipped with a material supporting device. The front material supporting device can have rotation, lifting and other actions according to the shearing needs, but it must be a safe and reliable structure.
2.5.2 The bar shearing machine should have a material dividing device and a material feeding device to eliminate the hidden dangers of accidents when manually clearing broken materials. 2.6 Clutch and brake
2.6.1 The interlocking of the clutch and brake must be reliable when working. 2.6.2 Friction clutch and brake
2.6.2.1 The interlocking control action of the pneumatic friction clutch and brake should be flexible, reliable, and must not interfere with each other. 2.6.2.2 The brake spring of the pneumatic friction brake should have good working performance and should prevent the bolt from breaking and the spring from flying out. 2.6.2.3 The pneumatic friction brake should have structural facilities that can prevent grease, water, etc. from entering the friction surface. The main shaft braking angle of the pneumatic friction brake shall not be greater than 30° when designed, and the actual braking angle shall comply with relevant regulations. 2.6.2.4
2.6.2.5 The specific pressure, operating temperature rise and linear speed of the pneumatic friction plate (or block) in the pneumatic friction clutch shall be within the range allowed by the friction material.
The electromagnetic clutch shall be equipped with a cooling and lubrication system (except for the ten-type). 2.6.2.61
2.6.2.7 The electromagnetic clutch must prevent the possibility of the shear clutch and the brake clutch being engaged at the same time. 2.6.3 Rigid clutch and brake
2.6.3.1 The impact toughness and strength of the parts of the clutch that bear impact (turn key, sliding pin, tooth insert, etc.) shall meet the design requirements, and non-destructive testing shall be carried out on their internal quality when necessary. 2.6.3.2 The operating mechanism of the turn key clutch shall have: the block shall have good contact with the key tail of the turn key. a.
The connection between the cam block and its rotating shaft must be reliable, and a buffer mechanism shall be installed. b.
The rotation of the turn key in the keyway shall be flexible and reliable. c.
2.6.3.3 The operating mechanism of the sliding pin clutch should have the following features: The active part can only drive the driven part to rotate after the crescent fork is completely out of contact with the sliding pin. a.bZxz.net
The movement of the sliding pin and crescent fork in the slide groove should be flexible and reliable. b.
The crescent fork should be able to reset in time after a single stroke operation. c
The crescent fork should not be pushed down by external force when not in operation. d.
2.6.3.4 The seat frame of the rigid clutch operating mechanism must be correctly and firmly installed on the bed, and must not be loosened due to vibration. 2.6.3.5 For various belt brakes interlocked with the rigid clutch, the braking angle of the main shaft shall not be greater than 10° when designed, and the actual braking angle shall comply with relevant regulations.
2.6.3.6 The actual contact area of the brake belt shall meet the braking requirements. 2.6.4 Control system of clutch and brake 2.6.4.1 The connecting rod mechanism of clutch control must be able to prevent the clutch from automatically engaging when the balance control is lost: the clutch should be able to automatically disengage when the force applied to the clutch is eliminated. 2.6.4.2 When using clutches and brakes controlled by pneumatic components, the exhaust gas is not allowed to point to the operating position. 2.6.4.3 In the clutch and brake control gas circuit system, a safety device must be installed, which should be able to automatically disengage the clutch and stop the tool holder when a fault occurs. Restarting cannot be achieved before the fault is eliminated. 2.6.5 Interlocking device
2.6.5.1 The clutch should not be engaged before the main engine is started. 2.6.5.2 The clutch and brake must be designed with an interlocking structure, which can be mechanical interlocking, electrical interlocking or pneumatic interlocking to avoid uncoordinated actions.
2.6.5.3 When equipped with dual controls such as hand control and foot control, continuous and one-way control, the interlocking structure must be designed so that only one of them can be operated at a time.
2.7 Transmission system
2.7.1 For transmission parts and components such as transmission gears, pulleys, flywheels, levers, couplings, etc. that are exposed outside the bed and less than 2.5m from the operator's standing plane, protective covers or baffles should be installed. 2.7.2 The transmission system should be equipped with an overload protection device. 2.7.3 The flywheel should rotate smoothly, and its circular runout should comply with the provisions of relevant technical conditions. 2.7.4 The flywheel should use a red arrow to indicate the direction of rotation. 2.7.5 When the flywheel is not in normal operation, shearing work is not allowed. 2.8 Tool holder balancing device
2.8.1 Shearing machines should generally be equipped with pneumatic (or hydraulic, spring and heavy hammer, etc.) type tool rest balancing devices. 2.8.2 The tool rest balancing device should have safety structures and protective measures to prevent danger when parts such as pistons, pull rods, springs, connecting rods, heavy hammers, chains, and balance levers are broken, loosened or damaged. 2.8.3 The tool rest balancing device should be able to achieve reliable balance of the tool rest at any position of the stroke without relying on the action of the brake, when the connecting rod is broken, the air supply is interrupted, the hydraulic pressure is insufficient, or other faults in the transmission system are disconnected, to ensure that the tool rest does not fall suddenly. 2.9 Blade gap adjustment loading
2.9.1 The upper and lower blade gap adjustment device should have a structure with accurate adjustment and reliable locking. 2.9.2 The punching part of the combined punching and shearing machine should have a tool setting device. 2.10 Tool
2.10.1 When installing or replacing the blade of the shearing machine, it must be correct, firm, reliable, safe, and labor-saving. 2.10.2 For shearing machines such as combined punching and shearing machines that use multi-piece combined blades, corresponding protective devices must be used. For shearing machines that only use one shearing position at a time, the unused shearing position must be blocked or equipped with a safety device. 2.10.3 For shearing machines that use rotating blades, such as flying shears and disc shears, rolling feeding and clamping devices must be installed in front of the shearing position. A workpiece guide device should be installed behind the shearing position. 2.11 Pedals and operating devices
2.11.1 The pedals should be flexible and reliable, and should have anti-slip plates or anti-slip pads on the plates, and the free travel of the pedals should be ensured to be not less than 45mm.
2.11.2 In order to prevent pedestrians or accidentally dropped objects from touching the pedals and starting them, protective covers must be used on the upper part and both sides, and they should be waterproof, moisture-proof and high-temperature resistant.
2.11.3 The foot pedal (rod) or foot switch should be reset by a spring, and it must be able to reset automatically when the operator's foot pressure is removed. 2.11.4 Newly designed shearing machines should no longer use mechanical rigid foot lever operating devices. 2.11.5 The manual switch, handle, etc. for operating the shearing machine should be installed within the range that is convenient for the operator to operate, and the height should be 1 to 1.5 meters away from the operator's standing plane.
2.11.6 The operating handle, hand wheel, foot pedal, etc. should ensure that the operation is simple, fast, labor-saving, flexible and reliable. 2.11.7 The operating direction of the operating device should be consistent with the required movement direction of the operated object. 2.11.8 The shape and color of the operating device should be easy for the operator to distinguish, and its performance and use should be indicated in the universal international standard text and symbol table 347
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2.12 Ladders, platforms and railings
GB 6077--85
2.12.1 Where the parts of the shearing machine that cannot be adjusted and repaired on the ground are within the scope of high-altitude operation, ladders, platforms and railings must be provided and should comply with relevant enclosure standards.
2.12.2 To prevent accidental start-up, a foot lever should be provided on the ladder 1m above the standing platform to interlock with the operating control system. When the foot lever is provided, the main transmission control should be disconnected. 2.13 Others
2.13.1 The shearing machine should be equipped with various signs and labels such as lubrication, operation and safety. For dangerous parts that cannot be equipped with protective devices, necessary danger signs should be provided.
2.13.2 For shearing machines that are sheared in a hot state, appropriate shielding must be provided for the hot workpieces. 2.13.3 The movement of the auxiliary machine (or auxiliary device) equipped with the main machine should be coordinated with the main machine. Where there are dangerous parts of the auxiliary machine that endanger personal safety, protective devices should be installed or protective measures should be taken. 2.13, 4 In order to prevent the shearing head or fragments of the shearing machine (especially the bar shearing machine) from splashing and flying out, a protective baffle (or protective net) must be added to its dangerous area.
2.13.5 The sound pressure level of the noise generated by the shearing machine during the no-load process should comply with the provisions of the national noise standard. :3 Electrical control, pneumatic and hydraulic systems
3.1 Electrical control
3.1.1 The safety requirements for electric transmission and control should comply with GB4064-83 "Guidelines for Safety Design of Electrical Equipment" and relevant regulations.
3.1.2 All electrical protection devices should be adapted to the power supply voltage, load conditions and environmental conditions. Necessary inspections should be carried out before installation, and safety and reliability tests should be carried out after installation. 3.1.3 The installation of electrical equipment must be firm, the line connection should have good contact, and the wire joints should have measures to prevent loosening. Electric appliances and protective devices that need to be shockproof should have vibration reduction measures. 3.1.4 The selection and installation of grounding devices should meet the requirements of electrical safety and should be clearly marked. 3.1.5 A double-circuit design should be adopted for electrical circuits that affect safety control and display. 3.1.6 The shearing machine must have a sufficient number of emergency switches installed at all control points or feeding points. For automatic production lines or combined units that cannot be seen in full at the control point, signals such as parallel preparatory alarm devices should be configured. 3.2 Pneumatic and hydraulic
3.2.1 The maximum oil pressure or air pressure provided in the pneumatic and hydraulic systems shall not exceed the safe working pressure of the components used in the system. Hydraulic and pneumatic components shall comply with the provisions of current standards. 3.2.2 An oil-water separation device should be installed in the pneumatic system. No leakage is allowed in the pneumatic, hydraulic, lubrication and cooling systems. 3.2.3 Pneumatic and hydraulic systems should be equipped with safety devices to prevent overload and impact. 3.2.4 In pneumatic and hydraulic systems, when the air pressure or hydraulic pressure suddenly loses or the air or liquid supply is cut off, there should be protective measures or necessary display devices.
3.2.5 The design, structure and manufacturing process of pressure gas storage tanks, cylinders and pressure oil storage cylinders should comply with the requirements of the current relevant standards. 4 Safety devices
4.1 Conditions that safety devices should meet
The safety devices of the shearing machine should at least meet the following conditions: 4.1.1 During the operation of the equipment, it is impossible for part of the operator's body to approach the moving parts and components in operation and enter the danger limit.
4.1.2 During the operation of the tool holder, when the hand is separated from the button or joystick used to operate the tool holder, the tool holder should be able to stop moving until it enters the danger limit.
GB 6077-85
4.1.3 During the operation of the knife holder, when the hand approaches the danger limit, the knife holder can stop the movement. 4.2 Shielding safety protection device
4.2.1 Shielding protection devices such as protective fences, protective baffles, protective covers, and protective nets should be installed on the dangerous parts of the shearing machine knife holder and the pressing device. The structural forms of shielding protection devices can be divided into: fixed, movable, adjustable and local types. 4.2.2 Shielding protection devices must meet the following requirements: They can prevent hands or fingers from entering the operating danger zone from the top, bottom, left, right, front, and back of the device or passing through the device. a.||tt| |The devices must overlap each other reliably and not touch the operating parts of the equipment. Assemble with fasteners that are not easily disassembled by the operator. c.
d. It must be easy to observe and repair, and must not become a source of danger. 4.2.3 Fixed shielding devices must not be opened when the tool holder and other moving parts are in operation, and must be firm and durable. 4.2.4 Movable shielding devices must be designed with an interlocking structure that allows the tool holder to move only when the device is closed, and the tool holder stops moving when opened.
4.2.5 Adjustable shielding devices can adjust the lower gap as needed. 4.2.6 Local shielding devices can prevent operators from being injured by work The sides or throat of the workbench cannot enter the danger zone, and it is convenient to cut sheets longer than the blade.
4.2.7 The limit switch that controls the knife holder on the shielding safety protection device must not come into contact with the human body, materials, or any other objects outside the device.
4.2.8 The protective length of the protective device can generally be designed according to the length of the working table of the shearing machine. 4.2.9 When a metal mesh is used as a protective device, the mesh size shall not be greater than 30mm. If a transparent material is used as a protective device, 3-6mm thick organic glass can be selected.
4.3 Light-type safety control device
4.3.1 The optical safety control device must meet the following requirements: a. There is no danger to the operator.
The circuits and electrical components used should ensure the function, strength and life of the safety device. c.
Changes in the lighting source or other environmental factors cannot affect the control device. d.
It has a complete monitoring function.
When a part of the human body blocks the light and approaches the dangerous area, the tool holder can stop moving immediately. e.
4.3.2 When the number of optical axes formed by the projector and the light receiver exceeds two, the distance between the optical axes should not exceed 50mm. 4.3.3 If the vertical plane formed by the + optical axes is more than 500mm away from the work danger limit, the distance between the optical axes should not exceed 70mm.
4.3.4 Within the range of the tool holder travel, the projector and the light receiver should ensure that they can operate effectively during operation. 4.3.5 For shearing machines using optical safety control devices, appropriate vibration elimination measures should be taken. 4.3.6 When an incandescent lamp is used as the light source in the projector, its light receiver should be located more than 50mm away from the optical axis, and the operation of the safety device should not be affected when irradiated with a 100W incandescent lamp. 4.3.? When an incandescent lamp is not used as the light source of the projector, its light receiver must not be sensitive to light from outside the projector. 4.3.8 Optical safety control devices are not allowed to be used as operating mechanisms for starting or stopping the operation of the shearing machine's knife holder. 4.3.9 It is allowed to be designed so that the shearing machine's knife holder works when it moves downward and does not work when it moves upward. 4.3.10 The electrical control part should be equipped with devices to prevent direct sunlight and shield the magnetic field. 4.3.11 The electrical components used and the complete set of safety control devices purchased from outside should comply with relevant national standards. 4.3.12 The number of optical axes and the appropriate installation position must be selected to match the stroke length of the shearing machine. 4.3.13 When this device is used on a shearing machine with a rigid clutch, it must be used in conjunction with other safety devices. 4.4 Two-hand operation safety control device
4.4.1 The two-hand operation safety control device should have a mechanism for stopping once per stroke. 4.4.2 The knife holder can only move when both hands operate two control buttons or two joysticks at the same time. 349
GB 6077--85
4.4.3 In each stroke, the shearing machine can only be restarted when both hands of the operator leave the control buttons or joysticks. 4.4.4 The shortest distance between the inner sides of the two control buttons or two joysticks of the two-hand operation safety device should be no less than 300mm and no more than 600mm at most.
4.4.5 The two control buttons of the two-hand operation safety control device should be installed in the switch box (or button box). The top of the button shall not protrude from the surface of the switch box (or button box). 4.5 Safety distance
The safety distance between the two-handed operating button (or the sensing area formed by photoelectric or infrared projection) and the working danger zone should not be less than the value calculated by the following formula:
Ds =1.6 (Ti +T2)
Wherein, Ds--safety distance, mm,
1.6--hand extension speed, m/s,
T1--the time from the time when both hands release the button (or the hand and body block the sensing response area) to the time when the electromagnetic control device is actuated, ms,
T2--the time from the start of braking to the stop of the tool holder movement, ms. 4.6 Marking of safety control device
When the safety control device leaves the factory at a specialized manufacturer, it should have the following markings: a. Model and manufacturing number,
b. Manufacturer name,
Date of manufacture (export);
Type and performance of shearing machine applicable to the safety device, shear thickness and blade length; e.
Light-type safety devices shall be marked with the time from the time when the hand blocks the light to the time when the quick stop mechanism starts to operate (unit: ms), and shall also be marked with the effective distance and protective height (unit: mm); f. Two-hand operation safety devices shall be marked with: (a) the time from the time when the hand leaves the button to the time when the quick stop mechanism starts to operate (unit: ms); (b) the maximum time required from the time when the button is pressed to the time when the knife holder reaches the bottom dead center (unit: ms) and the corresponding safety distance (unit: mm);
(c) the stop time applicable to the safety device (referring to the time from the time when the quick stop mechanism starts to operate to the time when the knife holder stops, unit: ms) and the safety distance corresponding to the stop time. Note: ① The safety distance of a two-hand operation safety device refers to the distance between the button and the danger limit. ② The safety distance of a light-type safety device refers to the distance between the optical axis and the danger limit. ③ Effective distance refers to the limit distance (unit: mm) at which the projector and the light receiver can effectively play their roles. 5 Inspection rules
5.1 Safety performance inspection
The technical inspection department of the shearing machine manufacturer shall conduct a comprehensive inspection of the safety performance of the shearing machine while inspecting the shearing machine leaving the factory according to professional standards.
5.1.1 The shearing machine is tested for idling. All actions within the design performance range are tested under no-load to see if they are normal, and the reliability of the safety device is checked in detail.
The provisions on idling time shall be implemented in accordance with relevant technical conditions. 5.1.1.13
5.1.1.2 Inspect the flexibility and reliability of the sequential actions of the clutch and brake. No continuous operation is allowed in the single stroke specification. 5.1.1.3 Inspect the correctness of the coordinated actions of the rigid clutch, brake and its operating mechanism. The turning key and sliding pin shall not be stuck or broken, and the spring shall be in normal working condition.
5.1.1.4 Check the sensitivity, reliability and coordination of the friction clutch brake and electromagnetic control valve interlocking control. During operation, the friction 350
plate (block) must not be burned.
GB 6077--85
5.1.1.5 Check the braking state of the brake, and the actual braking angle shall not be greater than the specified data. 5.1.1.6 Check the coordination, accuracy and reliability of the shearing machine's knife holder, pressing device, balancing device operating mechanism and interlocking device. When the knife holder stops moving, it should stop reliably at the position specified in the design. 5.1.1.7 Check the safety protection of the exposed transmission parts. 5.1.2 Shearing machine load and overload test
5.1.2.1 All mechanisms and working systems of the shearing machine should be coordinated, reliable and safe during the load test. 5.1.2.2 After the load test, the rigid clutch should be sampled and disassembled for inspection. 5.1.2.8 Check the reliability of the balancing device. 5.1.2.4 The full-load test of the shearing machine shall comply with the provisions of the relevant standards. 5.1.2.5 The shearing machine shall be subjected to an overload test at 120% of the nominal shear force, and the test method shall be carried out in accordance with the relevant technical conditions. During the overload test, the strength and deformation of the mechanical structure, upper tool holder and other parts shall be checked to verify the correctness and safety of the design. 5.1.2.6 During the overload test, the working conditions of the electrical, hydraulic, pneumatic, lubrication and cooling systems and their auxiliary devices shall be checked, and the reliability of the safety device shall be checked.
5.1.3 Inspection of safety devices
5.1.3.1 Check the opening and closing action and safety interlocking of fixed or movable protective fences. 5.1.3.2 Check the reliability of the adjustment and use of fixed or movable protective fences, and the height and length of protection. 5.1.3.3 Check the installation, safety distance and operating function of the two-hand operated safety control device. 5.1.3.4 Check the working status of the optical safety control device after it is turned on. When the operation enters normal, test its safety protection function for no less than 10 times.
5.1.3.5 Check whether the light receiver is not disturbed by external light sources. 5.1.3.6 Check the safety distance between the projector and the light receiver, the sensing area and the stability of the installation. Check the reaction time of the effective action of each optical axis. 5.1.3.7
5.1.3.8 Check the safe use period of major electronic components. 5.1.4 Check the reliability of the relevant control circuits of the safety supervision control device and the display device, and the correctness of the display. 5.1.5 The inspection of electrical, hydraulic and pneumatic systems shall be carried out in accordance with the requirements of Chapter 3. 5.1.6 The noise inspection of the shearing machine shall comply with the provisions of the national noise standards. 5.2 Periodic safety inspection
Units using shearing machines must carry out periodic safety inspections on the shearing machines. 5.2.1 Periodic safety inspections of shearing machines shall be carried out no less than once a year. 5.2.2 During the regular safety inspection, the frame structure, main parts (components), clutch, pneumatic hydraulic lubrication system, electrical equipment, safety protection devices, etc. of the shearing machine shall be comprehensively inspected, and the acceptance standards shall comply with the relevant technical requirements of the manufacturer. 5.2.3 The regular safety inspection shall be recorded in detail and sorted into the equipment file. 6 Management and Use
6.1 Management
6.1.1 The technical safety department and equipment management department of the enterprise must participate in the acceptance work and regular safety inspection of the installation and trial operation of the shearing machine after overhaul, and can only be used after passing the acceptance. 6.1.2 Each shearing machine shall be numbered, registered, and a complete equipment file shall be established. The equipment file shall include: the name of the manufacturer, the installation unit, and the quality certification documents and technical data provided during the overhaul and transformation, and the equipment and personal accidents during use. 6.1.3 Establish the safe operation procedures and handover system, job responsibility system, maintenance system, regular inspection and overhaul system, accident registration and reporting system, etc. of the shearing machine, and strictly implement them. 6.1. It is strictly forbidden to dismantle or damage the safety device. 6.1.5 The operator must be at least 18 years old and have received special training from the enterprise department, be familiar with the equipment performance and maintenance knowledge, and pass the safety 351
examination before being allowed to operate independently. GB6077—85
6.2 Use
6.2.1 The user and the operator must strictly follow the provisions and operating procedures of the shearing machine safety instructions provided by the design and manufacturing unit to correctly use and repair the shearing machine.
6.2.2 When the user repairs, adjusts, installs, adjusts, disassembles and replaces the blade of the shearing machine, the machine tool should be disconnected from the energy (electricity, gas, liquid) and stopped, and a pad should be placed under the knife holder. 6.2.3 The user must ensure that the shearing machine has a good working environment. There must be enough working area for loading and unloading materials, workpieces and waste materials, and there must be no obstacles, grease, oil and water around. 6.2.4 For shearing machines with outdated structures, inconvenient operation and no effective safety protection devices, after careful appraisal by the enterprise leaders, equipment management departments and technical safety departments, it should be scrapped and it is strictly prohibited to resell them. 6.2.5 For shearing machines in use, if they cannot meet the requirements of this standard within three years after technical transformation, they are prohibited from use. Additional notes:
This standard is proposed by the Ministry of Labor and Personnel of the People's Republic of China. This standard was drafted by the Inner Mongolia Autonomous Region Labor Protection Research Institute. The drafters of this standard were Gao Zhuangwei, Ren Dazhong, Jia Ruichang, Zhang Baozhen, Xu Ying, Bao Hua, and Wang Chunshan.
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