GB 13887-2008Safety codes for cold pressing (English PDF)

3.1

a) press and apparatus, equipment (machinery and equipment safety protection devices and die, etc.);

b) press operator's personal safety;

c) press-related staff (for example, maintenance personnel and die installation and adjustment work, etc.) personal safety;

d) due to accidental mechanical failure or an accident produced by equipment and endanger the personal safety;

e) convenience or unduly taxing operational.

3.2 Meet the following two conditions is security presses.

a) equipped with a hydraulic friction clutch or the press;

b) equipped with safety devices with both hands;

c) with sensitive type safety devices and alarm interlock failure or transportable stall;

d) equipped with interlocking safety cover.

3.3 Safety devices and general security control device.

3.4 Since the stamping operation possible for the operator to cause area damage.

4 security requirements for the structure and process of stamping

4.1 General Requirements

4.1.1 must follow JB/T 4378.1, JB/T 4378.2, GB/T 15055, GB/T 13915, GB/T 13916, GB/T 13914 and JB/T 9175.1 and other standards, the right structure and process design stamping. Its structure should function

4.1.2 stampings (including appearance function) and use adapted to the conditions.

4.1.3 Stamping structure must have good technology, economy and stamping production safety. Security as a priority.

4.1.4 must stampings structural design and process design stage, to take measures against all danger and insecurity may be generated Prevention.

4.2 Design

4.2.1 absolutely avoid sharp edges, corners and projections and the structure and function independent of the conditions of use.

4.2.2 The individual should be substituted with scattered small pieces of the whole structure.

4.2.3 In addition to the choice of materials to adapt to the strength and stiffness requirements of the workpiece, the forming process should meet the requirements of the plastic deformation. Forming, Bending and drawing large plastic workpiece materials should be used.

4.2.4 There should avoid contour slit or notch (cutout groove width is less than or equal to 2 times the sheet thickness) of complex shape structures.

4.2.5 Avoid punching width less than or equal to the sheet thickness and constant width of the structure in the longitudinal direction.

4.2.6 fitting structure shall conform to the following points.

a) in different material thickness and strength conditions, the minimum allowable punching diameter;

b) the minimum distance to the edge of the hole bending member bend side;

c) the minimum distance to the edge of the hole of the outer profile;

d) the minimum distance between the hole and the hole.

4.2.7 bending member crimping minimum height must be greater than

2.5 times the sheet thickness. The minimum height of the hemming bending member must be greater than 4 times The sheet thickness;

4.2.8 bent parts, formed parts and drawing parts, must be considered a step in the process of fixing the reference blank, and positioning stable.

4.3.1 Process design, the provisions of

4.2 should be structured review process.

4.3.2 choose presses, special attention should be nominal force, slide stroke, Die height, table and slide stroke adjustment and the effective work And other major technical parameters.

4.3.3 you must use security presses.

4.3.4 Process design should pay attention to prevent overload presses, deep drawing parts should be noted that drawing force (see Chapter 9).

4.3.5 Process design must also comply with GB/T 8176-1997 the provisions in 6.1,

4.3.6 When the press of the main technical parameters, performance, form and its attachments, etc. can not meet the technical requirements nor appropriate alternative press , To submit instructions and recommendations for the press manufacturer reference.

4.3.7 When using manual operation, you should consider feeding the workpiece positioning and removal direction, and to facilitate safe operation.

4.3.8 safety device used, operator safety tools, safety precautions and operation, should be included in the same language and the same press process Member.

5.1 General Requirements

5.1.1 must press the relevant requirements of GB 5083, there is provided a safety device to prevent injury. Presses supplier must not eliminate In addition to warning of dangerous places or instructions.

5.1.1.1 The following moving parts may cause injury to people, must use protective shields to prevent straying into human body.

a) flywheel, gears, pulleys and shaft ends and other persons close to the rotary member;

b) clamping point gear, pulley and the drive chain;

c) clamping point slider and relatively stationary portion. Guards should be installed in the handle, easy hook or other portable devices. Fixed or shield support bracket, at least should be able to withstand the weight of the shield twice the static load.

5.1.1.2 The following phenomena may occur in parts broken loose, loss or release of mechanical energy and harm people, must protect Cover (set) or locking means and measures.

a) due to breakage of the shaft causes the motor pulley, flywheel, clutch, gears and other moving parts of the falling or flying;

b) Since the bolt loosening or breakage caused by motor shield, or other fastener fly off;

c) flying the spring fracture caused;

d) exposed to the exterior of the device shall be fitted with effective guards or protective cover, some large machine parts when subject to conditions, you can set Prevent people from touching the fence;

e) moving platform rail sweep should avoid because of the track with debris caused by splashing caused by accidents.

5.1.1.3 danger zone to cause injury to the operator must take special measures to prevent it. In addition to the press to provide reliable and secure Manipulation, external monitor with the brake system, the need for specialized treatment (see Chapter 6).

5.1.2 In addition to this standard, the safety requirements of the press should also comply with GB 17120, JB3350 and JB/T 1829 or the like.

5.1.3 Presses ergonomic design must conform to GB/T 8176-1997

5.2.1 General provisions

5.2.1.1 presses must have a reliable and sensitive drive control device.

5.2.1.2 transmission control device must be easily controlled and monitored.

5.2.2 Rigid clutches and brakes

5.2.2.1 rigid clutch transmission mechanical presses, there must be a single travel agency, as they control the action by the spring, the pressure should be used Spring, the spring guide rod or bore (tube) guide. When single stroke cycle is completed, the crank should stop at the top dead center, the actual error should not be greater than ± 5 °.

5.2.2.2 type manipulation device can be used with both hands or foot operated device, but both should choose one.

5.2.3 Friction clutches and brakes

5.2.3.1 using the friction clutch transmission press, you must have the following characteristics, that is, when the clutch is engaged to eliminate external conditions or off Electricity (gas), the clutch is disengaged immediately, while the brake is engaged immediately.

5.2.3.2 pneumatic friction clutch and brake control system, should press the safety interlock valve with safety monitoring devices.

5.2.3.3 In the clutch, brake control system, there must be an emergency stop button. When performing stop control of instantaneous action, must ensure that the clutch Immediately disengaged, brake engaged immediately. Re-engaging the clutch must be operated according to the selected mode.

5.2.3.4 emergency stop button to stop the operation should take precedence over other control devices.

5.2.3.5 each column should be set large presses the emergency stop button, the button should have a self-locking function. Emergency stop button should be set at the control point, to Near the feed point, staff can quickly reach and will not generate the malfunction at.

5.2.3.6 In the clutch, brake control system must be provided with stroke selector to select the operation mode press. But direct Transmission of large low-speed and high-speed presses, deep drawing presses, unless a small dedicated.

5.2.3.7 stroke selector should be "disengaged", "jog", "single trip" and "continuous journey" operation mode, press the clockwise turn arrangement.

5.2.3.8 stroke selector in "disengaged" position, all operation must be stopped, the slider can not be started. 5.2.3.9 "Jog" can be used to control one or both hands. "Single stroke" must hand control. When

5.2.3.10 single stroke cycle is completed, the crank should stop at the top dead center, the actual error is usually not more than + 5 ° ~ -10 °.

5.2.3.11 When you need to "continuous journey", the operator must first make a pre-control action. Continuous trip circuit and display should be easy tube Management departments to monitor.

5.2.3.12 When either of these maneuvers both hands but also with their feet the way, there must be hand, foot control selector, and choose one of the latter two, another operation Longitudinal mode must fail.

5.2.3.13 Select all applications as key switch and can be interlocked. But in a press 1000kN nominal power of not less This limits.

5.2.3.14 clutch is sensitive and reliable, without even the red.

a) rigid clutch switch or key and straight key should handle without breaking;

5.2.4 Hydraulic control system

5.2.4.1 The hydraulic control system of hydraulic machine, you must have the following characteristics, namely when the pump starts, only manipulate the slider starter, sliding Block to operate.

5.2.4.2 the hydraulic control system, there must be an emergency stop button. When the emergency stop control instantaneous action of the event, you must immediately stop the slider movement.

5.2.4.3 In the hydraulic control system must be provided with alternative press operation specification stroke selector. But only the "disengagement" and "continuous Trip "except hydraulic functions.

5.2.4.4 stroke selector should be "disengaged", "jog", "single trip" and "continuous journey" operation mode, turn clockwise arrangement.

5.2.4.5 When a hand can be when both feet way either of these maneuvers, must be provided with a hand, foot control selector, choose between one after another Kinds of ways to manipulate must fail.

5.2.4.6 emergency stop button, selector stroke and hand, foot control to select the functions and requirements, respectively, with reference to 5.2.3.4 ~

5.2.3.13 Provisions.

5.2.4.7 In the hydraulic control system, it is necessary to make a single stroke and/or continuous travel in one cycle process has the following characteristics.

a) a slider away empty rapid decline;

b) Slow Slider approaching the workpiece;

c) Slider load slow working stroke;

d) slider backlash rising rapidly.

5.2.4.8 Multi pump drives a hydraulic machine, pump control mechanism should be to ensure that each pump can be started sequentially.

5.2.4.9 The hydraulic control system should be able to ensure that when the slider to the maximum rate of decline, "stop" control can be achieved in the shortest moment of inertia Decreased value should meet the requirements in Table 1. Table

5.2.5 Other Transmission Control

5.2.5.1 presses the friction disk drive (friction press), Pneumatic presses (pneumatic presses) and using hand or foot drive Presses (collectively manual presses), allowing only a single stroke. Stroke length should be adjustable. Transmission control means presses

5.2.5.2 preceding article, shall direct manipulation lever (handle), which can be manual or foot control type of formula can be Single-hand control or hand control. But the hand control or foot control to choose between the two, another way to manipulate must fail.

5.2.5.3 should brake friction press.

5.2.5.4 screw press should meet the following requirements.

a) protective cover. the moving parts exposed, should generally be set up protective cover, protective cover between moving parts and can not harm the human body formed clip Tight spots;

b) clutch and brake. When the slider downward braking, brake stroke should not exceed 1/2 of the whole trip, the slider row, in any Positions can brake and the slider must not conflict with the rigid beam occurs. Brake generally should not use air, liquid or electricity as system Dynamic power;

c) Slide stroke cushioning device. press cushioning device should be set to prevent the failure of the brake when the slider is moved to the upper limit of the fuselage Rigid impact;

d) Foot manipulator. manipulation and manual manipulation of the foot should be interlocked, foot operated automatically adjust work norms and work regulations shall not be used Fan. Pedal foot pedal or activities should be connected to the electrical protective devices;

e) and other parts of the reference JB8780 JB/T 2547.1 standards.

5.3 slide balancing device

5.3.1 General provisions Short stroke, high-speed presses, the slider should be a small spring balance device, large and medium-sized presses, the slider shall pneumatic balancing device.

5.3.2 spring balance device

5.3.2.1 spring balancing device should be symmetrical distribution.

5.3.2.2 spring balancing device, such as a tension spring should be used in the upper portion of the slider; such as the use of the lower portion of the slider spring.

5.4.1 General provisions

5.4.1.1 manipulator should be sensitive and reliable, easy to manipulate.

5.4.1.2 maker response using both hands to manipulate objects (buttons, joystick or handle) or foot control actuator (button foot pedal or lever) The need to provide instructions. Pedal (see FIG. 1) is the use of a foot operated electrical switch or a valve or the solenoid valve operated pedal, the clutch control Foot control mechanism or clutch brake control system. Foot bar (see Figure 2) is a rigid mechanical linkage operated clutch pedal operation Vertical organization. Button foot pedal is the use of electrical switches operated solenoid valve or valves, and its role as the manual button. FIG. 1 the pedal of the two cases Two cases of foot bar 2

5.4.1.3 foot control actuator can only be used with both hands need to manage the work, manipulating the frequency of no more than the case of 20min-1 and can only be taken With one form.

5.4.1.4 When standing work, should maximize the use of the manual actuator without foot control manipulator.

5.4.1.5 In addition to pneumatic dispensing valve handle can move around, the other hand control lever (handle) of the steering direction can only be moved up and down, and shall Consistent with the slider rising and falling action. Direction of movement of the control operation of electrical equipment are to comply with the relevant provisions of GB 4205.

5.4.1.6 Presses manual stroke actuator (not including selectors) form only allows the use of push-button or lever type, does not allow the use of song Handle grips or hand wheel, knob, flip the lever switch form. Unless the adjustment member.

5.4.2 Operating force, stroke or angle and adaptability

5.4.2.1 manipulator control force means the operator of the manipulator manipulating force applied to part with the opening and closing control system switching power is not Certain equivalence. Steering force and stroke (or angle)

5.4.2.2 manipulator and the main dimensions recommended values specified in Table 2. Shape and Structure

5.4.2.3 manual control lever (handle) of the holding portion should shape manpower and manipulation meet the requirements. The depressed foot control actuator

5.4.2.4 surface should be non-slip, such as mosaic mat, an area of not less than 50cm2.

5.4.2.5 foot control actuator should tread forefoot pressure mode is not recommended for the whole foot or heel of the depressed mode. Table 2 actuator operating force...