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GB 13960.5-2008: [GB/T 13960.5-2008] Safety of transportable motor-operated electric tools. Part 2: Particular requirements for bench grinders
Status: Obsolete GB 13960.5: Evolution and historical versions
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[GB/T 13960.5-2008] Safety of transportable motor-operated electric tools. Part 2: Particular requirements for bench grinders
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GB 13960.5-2008
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| GB 13960.5-1996 | English | 479 |
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Safety of transportable motor-operated electric tools. Particular requirements for bench grinders
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GB 13960.5-1996
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PDF similar to GB 13960.5-2008
Basic data | Standard ID | GB 13960.5-2008 (GB13960.5-2008) | | Description (Translated English) | [GB/T 13960.5-2008] Safety of transportable motor-operated electric tools. Part 2: Particular requirements for bench grinders | | Sector / Industry | National Standard | | Classification of Chinese Standard | K64 | | Classification of International Standard | 25.140.20 | | Word Count Estimation | 19,130 | | Date of Issue | 2008-09-19 | | Date of Implementation | 2009-06-01 | | Older Standard (superseded by this standard) | GB 13960.5-1996 | | Quoted Standard | GB 13960.1-2008 | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 16 of 2008 (No. 129 overall) | | 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 applies to brush wheel diameter and wheel diameter of not more than 200mm, working speed is not greater than 50m/s of portable grinders (as defined in 3. 101 and 3. 112) of the removable bench grinders (Figure 101) and Combined BENCH GRINDER (Figure 107). | GB 13960.5-2008: [GB/T 13960.5-2008] Safety of transportable motor-operated electric tools. Part 2: Particular requirements for bench grinders
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Safety of transportable motor-operated electric tools.Part 2. Particular requirements for bench grinders
ICS 25.140.20
K64
National Standards of People's Republic of China
Replacing GB 13960.5-1996
Safety of transportable electric tools
Particular requirements for bench grinders. Part II
Posted 2008-09-19
2009-06-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Preface Ⅰ
1 Scope 1
2 Normative references 1
3 Terms and definitions
4 2 General requirements
5 Test 2 General requirements
6 Void 2
7 Category 2
8 Marking and instructions 2
9 protected from contact with live parts 4
10 starting 4
11 Power input and current 4
12 fever 4
13 Void 4
14 4 moisture resistance
15 Void 4
16 Overload protection of transformers and associated circuits 4
Durability 17 4
18 4 abnormal operation
19 mechanical hazards 4
20 Mechanical strength 7
21 Structure 8
22 Internal wiring 8
23 assembly 8
24 Power connection and external flexible cords 8
25 outer lead terminals 8
26 grounding 8
27 screws with the coupling member 8
28 creepage distances, clearances and distances through insulation 8
29 heat resistance, flame resistance and electrical resistance mark of 8
30 rust 8
31 Radiation, toxicity and similar hazards 8
Appendix 15
Foreword
All technical content in this section is mandatory.
This section GB 13960 "Safety of transportable power tool" in the second part of the series standard requirements for bench grinders. this
Series of standards consists of the following.
GB 13960.1 "Safety of transportable electric tools - Part 1. General requirements"
GB 13960.2 "safe second portion movable electric tools. requirements for circular saws"
GB 13960.3 "Safety of transportable electric tools Part II. Particular requirements for radial arm saws"
GB 13960.4 "safe second portion movable electric tools. planer and thickness planer special requirements"
GB 13960.5 "safe second portion movable electric tools. Particular requirements for bench grinders"
GB 13960.6 "safe second portion movable electric tools. requirements for band saws"
GB 13960.7 "safe second portion movable electric tools. Particular requirements for diamond drills with water supply."
GB 13960.8 "Safety of transportable electric tools Part II. Particular requirements for diamond saws with water supply."
GB 13960.9 "Safety of transportable electric tools Part 2. Particular requirements for cutting machine"
GB 13960.10 "Safety of transportable electric tools Part II. single spindle vertical milling special requirements"
GB 13960.11 "Portable electric tools Part Security. profile cutting machine of special requirements"
GB 13960.12 "Safety of transportable electric tools Part II. Particular requirements for high pressure cleaners"
GB 13960.13 "safe second portion movable electric tools. oblique cutting table saws requirements"
This Part replaces GB 13960.5-1996, and used with GB 13960.1-2008.
This section GB 13960.5-1996 major technical modifications include.
Reg structure --- the first part of this section due to the revision caused changes;
--- Introduction of IEC 61029-2-5 Amendment No. 1 (2001) The upcoming "modular bench grinders" into the scope of this section;
--- Chapter 8 signs and brochures, original content to 7.13 8.12.2b), introduces detailed safety warnings;
--- Revised Chapter 19 mechanical hazards flange, the spindle and the shroud requirements;
--- Revised Chapter 20 of the mechanical strength of the shield test requirements;
--- Modification 21.18, Test Method for increasing the switching should not be limited by adjusting the workpiece holders.
This section states that "applicable", showing the corresponding provisions applicable in 13960.1-2008 GB ; this section states that "change", then
Shall be subject to the provisions of this section; this section states that "modify", expressed in GB 13960.1-2008 corresponding provisions of the relevant content should be
The modification is subject to this section, and the provision of other content still apply; this states "addition", expressed in addition to compliance with
GB transportable motor operated outside the corresponding provisions of this section shall comply with the increased provision.
This part is proposed by the China Electrical Equipment Industrial Association.
This part of the National Power Tools Standardization Technical Committee (SAC/TC68) and focal point responsible for the interpretation.
This section is responsible for drafting unit. Shanghai Electric Tool Research Institute.
The main drafters of this section. Liu Jiang, Libang Association.
This part of the standard replaces the previous editions are.
--- GB 13960.5-1996.
Safety of transportable electric tools
Particular requirements for bench grinders. Part II
1 Scope
In addition to the following provisions, GB 13960.1-2008 this chapter apply.
modify.
Change the first paragraph.
This section applies to wheel diameter and brush wheel diameter of not more than 200mm, the operation line speed is not greater than 50m/s of movable type grinder
(As defined in 3.101 and 3.112) of transportable bench grinders (FIG. 101) and combined bench grinders (Figure 107).
2 Normative references
In addition to the following provisions, GB 13960.1-2008 this chapter apply.
3 Terms and Definitions
In addition to the following provisions, GB 13960.1-2008 this chapter apply.
3.1 Change as follows.
It means for covering part of the wheel, its role is to prevent the user from inadvertently touched during normal use of the wheel, and the grinding wheel in case of rupture,
Within the protected area to prevent flying debris out of the wheel.
3.2 Change as follows.
The installation of the desktop grinder, grinding wheel instead of other devices driven by the spindle.
3.30 Change to.
Means the continuous operation of bench grinders reached load, the load acting on the spindle torque rated input power (in watts single
Torque-bit) is used.
3.101
Placed in the appropriate workshops and hand holding the workpiece from a fixed to the machine spindle or two rotating grinding wheel, grinding metal
Tools or similar materials.
3.102
Supporting and driving wheel or wheel and/or rotating brush wheel bench grinders or a combination of the motor shaft for bench grinders.
3.103
Can bench grinders bench grinders or a combination of the device coupled to the dust collection system.
3.104
The wheel clamp device to the machine spindle. Flanges can be.
--- Intermediate recessed flat-shaped flange;
----Engaging flange;
--- Shaped hub flange.
3.105
Comprising a fixed on the machine spindle and inner flange with a fastening (or movable) outer flange flange assembly.
3.106
It is the center of the fastening flange assembly. It contains a fixed on the machine shaft, and centrally located within the wheel flange, and a
Does not depend on the machine spindle, the grinding wheel is fastened to the inner flange fastened on the use (or movable) flange.
3.107
On a soft wheel and the flange between the compressible material, which aims to make the role as uniformly as possible in the grinding wheel pressure, with
Decreases when sandwiched between the flange of the wheel slide danger.
3.108
Usually made of metal chuck, for supporting and driving the flat-shaped cup wheels, cylindrical cup-shaped grinding wheel or the end portion of the wheel.
3.109
For supporting and holding the workpiece surface or device.
3.110
Brush wheel or wheel line speed at work.
3.111
Mounted on the recommended accessories rated voltage or rated voltage range of the upper limit of manufacturers label reached maximum speed.
3.112
Placed in the appropriate workshops and hand holding the workpiece, and similar fixed a wheel brush wheel, grinding metal on the machine spindle or
Materials, or metal, or similar materials for cleaning, polishing and deburring tools.
4 General requirements
GB 13960.1-2008 this chapter apply.
5 General test requirements
GB 13960.1-2008 this chapter apply.
6 Void
Category 7
GB 13960.1-2008 this chapter apply.
8 Marking and instructions
In addition to the following provisions, GB 13960.1-2008 this chapter apply.
8.1 Addition.
Tools should be marked.
--- Rated speed, r/min. Of tools designed to run in a variety of speed for each speed setting value should be clearly marked with the corresponding
Rated speed;
--- The maximum diameter of grinding wheel used, mm;
--- Combination for bench grinders, wheel or use the brush roll maximum diameter, mm;
--- Combination bench grinders/brush turbine wheel in the brush near the shaft clip warning against using the tool brush wheel side of the wheel;
--- Wheel peripheral speed, m/s;
--- Indicate the rotation axis direction of rotation. Application of convex or concave arrow, or other clear and durable marking methods in engineering
With on.
--- Threaded spindle to provide a tool axis should be marked thread size;
--- "Warning Always wear goggles!" Or ISO 7010.2003 symbol of M004.
8.6 Addition.
n Rated speed
8.12.1.101 all operations Instructions
Bench grinders and bench grinders combination universal security warning.
Rao) Read all safety warnings supplied, instructions, illustrations and regulations. Do not understand all the instructions listed below will result in electric shock, the
Fire and/or serious injury.
Chou) is not recommended for functions other than sanding, sanding, brushing, polishing or cutting operations. Power tools not specified function to operate
Make, it may be dangerous and cause personal injury.
Note. The list only those operations that the first sentence is not included in the warning. If the operation of all listed are recommended, you can remove this warning, but all with
After the warning, without exception, must be listed.
Ba) does not recommend the use of tools manufacturer and specially designed accessories. Otherwise, the attachment may be attached to your power tool, but it
We can not guarantee safe operation.
Of the operation will burst and splash.
Hole mount with power tools unworthy attachment will be instability and excessive vibration can cause loss of control.
Cracks, tears or excessive wear.
Force protection, gloves, and can block small abrasive or workpiece fragments work apron. Eye shields must block the fly various operations generated
Crumbs. Dust mask or respirator must be capable of filtering particles generated by the operation. Long-term exposure to high intensity noise can cause hearing loss.
Broken attachment could fly off and cause debris close to the operating area of bystanders hurt.
8.12.2 b) increase.
--- Wear protective glasses;
--- Do not use damaged or worn wheel and brush roll;
--- Should always adjust Mars shield to compensate for wheel wear, the distance between the guard and the wheel as small as possible, in any case lower
Section amplitude is not greater than 2mm;
--- Gradually adjusted to compensate for workpiece carriage wheel wear, so that the distance between the workpiece and the grinding wheel bracket as small as possible, in any case
Adjusting the amplitude of no more than 2mm;
--- How to join the collecting device (if any);
--- Fitted with flat-shaped flange on the bench grinders, recommended diameter flange thickness T and the hole;
--- Combination bench grinders always keep the brush wheel mounted on the shaft in order to reduce the risk of touching the rotating shaft;
--- Workpiece holders thickness wear limit.
Note. The available diagrams to represent the mode of operation.
9 protected from contact with live parts
GB 13960.1-2008 this chapter apply.
10 start
GB 13960.1-2008 this chapter apply.
11 Power input and current
GB 13960.1-2008 this chapter apply.
Fever 12
GB 13960.1-2008 this chapter apply.
13 Void
GB 13960.1-2008 this chapter apply.
14 moisture resistance
GB 13960.1-2008 this chapter apply.
15 Void
GB 13960.1-2008 this chapter apply.
16 Overload protection of transformers and associated circuits
GB 13960.1-2008 this chapter apply.
17 Durability
GB 13960.1-2008 this chapter apply.
18 abnormal operation
In addition to the following provisions, GB 13960.1-2008 this chapter apply.
18.10 Addition.
During the test, the spindle speed should not exceed 120% of rated speed.
19 mechanical hazards
In addition to the following provisions, GB 13960.1-2008 this chapter apply.
19.1 Addition.
Bench grinders and bench grinders combination shall be provided with a reliable defense system, without the aid of tools it can not be removed.
Note. Allow other measures to achieve the desired degree of mechanical safety. As long as these measures and provisions equivalent and equally reliable protection system.
19.1.101 shield
Bench grinders shall be provided with such a shield. Abrasive only partially shown in FIG. 102 is not hooded shroud should be designed to have anti-sand
Wheel unexpected burst of mechanical strength.
Guard should cover the end of the flange and the tool spindle.
Shroud should be designed not possible to use a larger diameter than the standard 1.07 times the maximum diameter of the wheel.
Guard shall meet the following requirements.
19.1.101.1 shroud thickness
In the case of using a tensile strength greater than 200N/mm2 steel wheel and a thickness less than 0.15 times the diameter of the wheel, the wheel is flat-shaped peace
Shaped cup wheels designed hood, the minimum thickness should take the following values.
--- In the case of the operation line speed is not greater than 35m/s of, 200mm, and the shroud circumferential direction if the wheel diameter is less than the rated
The minimum thickness should be 2mm; if wheel diameter is equal to the nominal 200mm, the minimum thickness of the shroud in the circumferential direction should be
2.5mm. If less than the nominal wheel diameter 200mm, both sides of the minimum thickness of the shield should be 1.5mm, if the nominal wheel
Is equal to the diameter of 200mm, both sides of the minimum thickness of the shield should be 2.5mm;
--- In the case of the operation line speed is greater than 35m/s, if the nominal wheel diameter less than 200mm, the shroud circumferential direction
The minimum thickness should be 2mm; if wheel diameter is equal to the nominal 200mm, the minimum thickness of the shroud in the circumferential direction should be
4mm, if the minimum thickness is less than the nominal wheel diameter 200mm, both sides of the shroud should be 1.5mm, if the nominal wheel
Is equal to the diameter of 200mm, both sides of the minimum thickness of the shroud should be 4mm.
These dimensions are considered necessary strength to withstand vibration, thus ensuring a good fixed workpiece holders, eye protection screen and Mars sheeting.
Note. For other materials, the wheel size, the manufacturer shall pass the following tests to prove the strength of the shield.
Test conditions.
Wheel shield test shall be consistent with the use and assembly conditions with the original design is based on the sample conditions.
Test samples should be preferred tool itself, if not, the selection of the motor shaft with its original tools the same tools.
Shroud must be equipped with its attachments (if any).
Specimens should be in running condition, wheel speed reaches the maximum speed in normal use.
In consideration of the risk of the test, the sample must be installed in a protective chamber, and to take measures to prevent danger.
Under these conditions the sample in by missiles fired to the point of impact, the rotating wheel crushed the point of impact is located in the opening angle of the shroud
Bisector, and as close to the flange of the place, so that the wheel is completely damaged.
Shooting conditions.
--- Sample shall be fitted with such wheel; its structure and the test using the same wheel, same installation conditions;
--- Towards the identified point of impact shooting.
Test shooting conditions (missile shape, distance, emission) is to ensure that the conditions of the wheel is completely damaged.
19.1.101.2 shroud opening
19.1.101.2.1 through the center of the wheel above the horizontal field angle of the shroud should not exceed 65 °.
In this plane, the opening should be less than the height H of 0.2D (see FIG. 103), but in any case, should not exceed the total field angle 90 °.
19.1.101.2.2 equipped for flat-shaped cup wheels and the end face of the shroud opening is symmetrical bench grinders, water through the wheel axis
Shroud height above the plane of the opening should be less than 0.4D, the shroud over the wheel axis below the level of the opening height H should be less than 0.2D
(See FIG. 104b)).
19.1.101.2.3 circumferential surface of the shield opening width should be sufficient to use the wheel completely worn.
19.1.101.2.4 the wheel, wheel guard and side clearance of all types should be as small as possible; but in order to achieve proper dust collection efficiency
Fruit should be designed airflow opening section.
19.1.101.3 Mars shield
Equipped with flat-shaped grinding wheel bench grinders bench grinders and composition of Mars should guard to limit wheel to wheel flying sparks and particles
Outside the shield, also play a role to improve the dust collection efficiency.
Mars shield should be installed in the upper portion of the wheel cover wheel along the circumferential direction of the place. It should be mounted on the shroud, the shroud entire width
Cover all devices. Or the shroud itself.
Mars shield gap E between the grindstone, according to wheel wear, should be adjusted to a maximum of 5mm (see Figure 103).
19.1.101.4 workpiece carriage
Bench grinders and bench grinders combination shall be provided with workpiece holders, it is usually horizontal. This requirement does not apply to a combination of desktop wheel
Brush wheel side of the machine. Workpiece carrier should be adjusted so that when the wheel wear gradually adjust the distance F, the maximum to 2mm (see Figure 103
And FIG. 104).
Workpiece carrier should be easy to adjust, and the fixture should be able to ensure the stability of position of the movable portion.
If the wheel-side bench grinders and/or a combination of bench grinders equipped with a tiltable bracket workpiece, the workpiece holders should only go
Inclined, but can not make up the workpiece carriage tilt (see Fig. 105).
19.1.102 Added.
19.1.102.1 flange
19.1.102.1.1 wheel flange
Table 101 lists the minimum size of the wheel flange and the wheel corresponding to the wheel diameter thickness not exceeding 0.15 times the diameter of the wheel, the Act
Flanges with a minimum tensile strength of 430N/mm2 steel or other material of sufficient strength, or with a minimum tensile strength
Powder metallurgy materials 500N/mm2 made.
Table 101 wheel flange size (see Figure 108) in millimeters
1,003,465 3.2 1.5
1,254,286 3.2 1.5
150,529,105 1.5
200 68a 12a 10a 5a 1.5a
These values are used for a nominal diameter of 200mm, thickness 30mm chuck on the wheel is certainly appropriate.
Not use cast iron flanges.
19.1.102.1.2 brush wheel flange
Table 102 lists the corresponding brush wheel diameter wheel flange of the minimum size of the flange with a minimum tensile strength of 430N/mm2
Steel or other material of sufficient strength, or made with a minimum tensile strength of powder metallurgy material 500N/mm2 of.
Table size 102 brush wheel flange (see Fig. 108) in millimeters
100 345 1.5 1.5 1.5
12,542,522 1.5
150 525 2.5 2.5 1.5
200 685 2.5 2.5 1.5
Not use cast iron flanges.
19.1.102.2 sizes and materials
Workpiece holders size is determined by the manufacturer. But workpiece carriage should extend at least to the width of the wheel guard.
No matter how the workpiece carriage and the necessary processing wear life of the case, the thickness of the workpiece carrier should be sufficient to ensure that it can support
Workpiece to be machined without deformation.
The tool rests on steel, cast iron and light alloy.
19.1.103 eye protection screen
19.1.103.1 eye protection screen features
Bench grinders and bench grinders combination should be designed with eye protection screen to prevent particles splash to the eyes and face of the operator.
Goggle screen should be adjustable, and its size should be the operator during normal grinding and polishing of locations, including at the top of the wheel or wheel brush
The vertical position of the plane, only to see the screen through goggles work part or grinding wheel brush wheel.
Adjust goggles screen operation should not change or a combination of bench grinders bench grinders adjust other parts.
Goggle-screen applications transparent material having a certain impact and wear resistance made of plexiglass and polycarbonate recommended, any other
Plastic material.
19.1.103.2 minimum size rectangle or trapezoid Goggle screen transparent portion
For the installation of flat cup-shaped grinding wheel bench grinders, the minimum size of the screen on the goggles transparent portion of the mounting flat-shaped grinding wheel bench grinders
Like machine goggles on the screen, but on the bench grinders bench grinders or in combination, the thickness of the flat-shaped grinding wheel should be replaced by flat cup-shaped sand
The width of the wheel part of the work.
All bench grinders bench grinders and composition, the eye protection screen should thus assembled. symmetry axis of the wheel or wheel brush work unit screen
Sub-central vertical plane coincide (Fig. 106).
19.1.104 combination of bench grinders end of rotary axis protection
When the wheel is not installed on the brush, brush wheel side shaft should prevent accidental contact with the protective measures.
The first part of the test finger in Figure 2 is checked by using the touch probe.
NOTE. Figure 110 shows compliance with this requirement is a viable option.
19.2 Addition.
Due to a combination of bench grinders and bench grinders fixed on a support device.
19.101 spindles should be designed to provide or contribute to the clamping member and sanding driven tool design.
Design of the spindle thread direction or equivalent fastening device should be able to make all the clamping device when sanding, grinding wheel chuck or threaded hole chemotaxis
In fastening.
By observing the test.
To limit the vibration due to the unbalance of the wheel, put the total amount of eccentricity parts sanding member with respect to the real axis rotation center
No larger than 0.3mm.
The total amount will be eccentric shaft and the eccentric amount spindle diameter dimensional tolerances, dimensional tolerances and flange aperture positioned and oriented to the sand
The flange part diameter tolerance of.
By measuring the test.
19.102 tool should be designed to prevent speeding in normal use
Any tool speed under operating conditions shall not exceed 110% of rated speed.
To test the speed 5min after running through observation and measurement tools. Shall be fitted to produce accessories recommended maximum speed.
If the tool is limited speed controller, it is not necessary to find the maximum speed of the tool is equipped annex as a load.
20 Mechanical strength
GB 13960.1-2008 this chapter apply.
21 Structure
In addition to the following provisions, GB 13960.1-2008 this chapter apply.
21.18 Review.
On-off switch actuator bracket workpiece interference should not be regulated, limit switch contacts the workpiece carriage should not be regulated.
By (100 ± 1) mm diameter sphere is applied onto the switch test. Sphere tool should not be started.
22 Internal wiring
GB 13960.1-2008 this chapter apply.
23 components
GB 13960.1-2008 this chapter apply.
24 Power connection and extension cord
GB 13960.1-2008 this chapter apply.
Terminal 25 external conductors
GB 13960.1-2008 this chapter apply.
26 grounding device
GB 13960.1-2008 this chapter apply.
27 and screw coupling
GB 13960.1-2008 this chapter apply.
28 creepage distances, clearances and distances through insulation
GB 13960.1-2008 this chapter apply.
29 heat resistance, flame resistance and electrical resistance to tracking
GB 13960.1-2008 this chapter apply.
30 rust
GB 13960.1-2008 this chapter apply.
31 Radiation, toxicity and similar hazards
GB 13960.1-2008 This chapter does not apply.
1 --- flat-shaped grinding wheel;
2 --- flat cup-shaped grinding wheel;
3 --- flanges;
4 --- workpiece carriage;
5 --- eye protection screen;
6 --- parallel to the wheel guard;
7 --- collection opening;
8 --- switch means;
--- Handle. 9;
10 --- Mars fender;
. 11 --- cup wheel guard;
12 --- signs.
101 Bench grinders...
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