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GB 25490-2010: Safety of woodworking machines -- Single end tenoning machines with sliding table
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Safety of woodworking machines -- Single end tenoning machines with sliding table
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GB 25490-2010
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Basic data | Standard ID | GB 25490-2010 (GB25490-2010) | | Description (Translated English) | Safety of woodworking machines -- Single end tenoning machines with sliding table | | Sector / Industry | National Standard | | Classification of Chinese Standard | J65 | | Classification of International Standard | 79.120.10 | | Word Count Estimation | 28,266 | | Date of Issue | 2010-12-01 | | Date of Implementation | 2011-10-01 | | Quoted Standard | GB/T 3767-1996; GB/T 3768-1996; GB 4208-2008; GB/T 5013.1-2008; GB/T 5023.1-2008; GB 5226.1-2008; GB/T 6881.2-2002; GB/T 6881.3-2003; GB/T 8196-2003; GB 12265.1-1997; GB 12265.3-1997; GB 12557-2010; GB 14048.4-2003; GB 14048.5-2008; GB/T 14574-2000; GB/T 15706.1-2007; GB/T 15706.2-2007; GB 16754-2008; GB/T 17248.3-1999; GB/T 17248.5-1999; GB/T 18831-2002; GB 18955-2003; GB 20007-2005; JB/T 3105-1992; ISO 3745-2003; ISO/TR 11688-1-1995; EN 940-1997; EN 982-1996; EN 983-1996; EN 1218-2-2004; EN 1218-3-2002 | | Adopted Standard | EN 1218-1-1999, MOD | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 9, 2010 (No. 164 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 specifies the in-band mobile workbench single head mortising machine to remove hazards and risk-limiting requirements and/or measures. This standard applies to cutting wood, particleboard, fiberboard, plywood and veneer with a plastic material or welt machine. This standard includes all of the machine -related hazards, see Chapter 4. This standard does not apply the following machine: a) only saw mortising, b) the design of any knife shaft speed exceeds 6000r/min, c) move the table feed line faster than the average 25 �� 5% m/min, d) combined for mortising machine (see EN940: 1997), e) vertical cutter shaft with mortising unit (see GB20007-2005). | GB 25490-2010: Safety of woodworking machines -- Single end tenoning machines with sliding table
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Safety of woodworking machines.Single end tenoning machines with sliding table
ICS 79.120.10
J65
National Standards of People's Republic of China
Safety of woodworking machines
With a single head moving table tenoning machine
Published 2010-12-01
2011-10-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China issued
Table of Contents
Introduction Ⅲ
1 Scope 1
2 Normative References 1
2 3 Definitions
4 Schedule of Hazards 3
5 Safety requirements and/or measures 5
Control and command means 5 5.1
5.2 Mechanical hazard protection 7
5.3 Protection of non-mechanical hazards 13
6 Use the information 14
6.1 The warning device 14
6.2 mark 14
Instructions 14 6.3
Appendix A (informative) safe working practices 16
Examples of safety control systems Annex B (informative) 17
Annex C (normative) noise measurement when the machine is operating (running) condition 20
Foreword
This standard Chapter 3, 5.3.2.1 and Annex A, Annex B is recommended, the rest is mandatory.
This European Standard is a modified standard EN1218-1.1999 "Woodworking machine belt single head moving table tenoning machine" (in English).
This standard EN1218-1. compared to 1999, read as follows.
--- name change;
--- some text of editorial changes;
--- increased machine idling noise level limits;
--- deleted standard EN Appendices B and ZA, the standard EN Appendix C to this standard Annex B;
--- Added Appendix C.
--- other EN standard EN ISO standards or reference, there is employed as replaced by the corresponding standard of ISO standards of
EN standards or standards; our country has not been adopted as a standard or directly using standard EN ISO standards.
Appendix C to this standard normative, Annex A, Annex B is an informative annex.
The standard proposed by China Machinery Industry Federation.
This standard by the National Woodworking Machine and Tool Standardization Technical Committee (SAC/TC84).
This standard drafting unit. Woodworking Machine Tool Research Institute, Fuzhou, Shandong Group Co., Ltd. workers.
Drafters of this standard. Xiao Xiaohui, Song Zhimin.
Safety of woodworking machines
With a single head moving table tenoning machine
1 Scope
This standard specifies the removal and limit the risks of danger on the movable table with a single head tenoning machine (hereinafter referred to as machine) requirements and/or
Measures.
This standard applies to the cutting of solid wood, chipboard, fiberboard, plywood, and veneer or a plastic material welt machine.
This standard covers all hazards, see Chapter 4 relating to the machine.
This standard does not apply in the following machine.
a) a circular saw tenoning only;
b) the knife shaft according to any of the design speed exceeds 6000r/min;
c) moving average straight line of the table feed speed exceeds 25 ± 5% m/min;
d) for mortising Association Engine (see EN940.1997);
e) a vertical shaft with tenoning cutter apparatus (see GB 20007-2005).
Note. the chain fed single or double tenor see EN1218-2, only the circular saw tenoning machine, see EN1218-3.
2 Normative references
Terms of the following documents become provisions of this standard by reference in this standard. For dated reference documents, all later
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to agreements based on this standard
Whether the latest versions of these documents. For undated references, the latest version applies to this standard.
Engineering method of noise sources sound power level a reflecting plane free field GB/T 3767-1996 sound pressure
(EqvISO 3744.1994)
Determination GB/T 3768-1996 sound pressure of noise power levels of the sound source using a simple reflecting plane measurement surface envelopment
(EqvISO 3746.1995)
GB 4208-2008 shell protection (IP code) (IEC 60529.2001, IDT)
GB/T 5013.1-2008 rated voltage of 450/750V and Rubber insulated cables Part 1. General requirements (IEC 60245-
1.2003, IDT)
GB/T 5023.1-2008 rated voltage of 450/750V and below PVC insulated cables - Part 1. General requirements
(IEC 60227-1.2007, IDT)
GB 5226.1-2008 mechanical and electrical safety mechanical and electrical equipment - Part 1. General requirements (IEC 60204-1.2005,
IDT)
GB /Determination of sound power levels of noise sources reverberant field sound source is small, movable Method T 6881.2-2002 project sound pressure
Part 1. Comparison of the hard wall of the test chamber method (ISO 3743-1.1994, IDT)
GB /Determination of sound power levels of noise sources reverberant field sound source is small, movable Method T 6881.3-2003 project sound pressure
Part 2. special reverberation test rooms (ISO 3743-2.1994, IDT)
GB/T 8196-2003 mechanical safety of fixed and movable guards General requirements for design and manufacture
(ISO 14120.2002, MOD)
GB 12265.1-1997 Safety of machinery - Safety distances to prevent danger zones of the upper limbs (eqvEN294.1992)
GB 12265.3-1997 mechanical safety minimum distance to avoid crushing of parts of the human body (eqvEN349.1993)
GB 12557-2010 Safety of woodworking machines General
GB 14048.4-2003 voltage switchgear and control equipment, electromechanical contactors and motor starters (IEC 60947-4-1.
2000, IDT)
GB 14048.5-2008 voltage switchgear and control equipment 5-1. Control circuit devices and switching elements Electromechanical
Control circuit devices (IEC 60947-5-1.2003, MOD)
GB /14574-2000 verification and labeling machines and acoustic noise emission values apparatus T (eqvISO 4871.1996)
Safety Basic Concepts GB/T 15706.1-2007 General Mechanical Design - Part 1. Basic terminology and methods (ISO 12100-
1.2003, IDT)
GB/T 15706.2-2007 basic concepts of mechanical safety and General Design - Part 2. Technical Principles (ISO 12100-2.
2003, IDT)
GB 16754-2008 mechanical design principles of safety emergency stop (ISO 13850.2006, IDT)
GB/T 17248.3-1999 for machinery and equipment noise emitted operative position and the other specified emission sound pressure levels
Measuring method in situ (eqvISO 11202.1995)
GB/T 17248.5-1999 for machinery and equipment noise emitted operative position and the other specified emission sound pressure levels
Measurement environment Amendment Act (eqvISO 11204.1995)
GB/T 18831-2002 mechanical interlock designed belt guard and selection policy (ISO 14119.1998,
MOD)
GB 18955-2003 woodworking tools safety cutter, a circular saw blade (EN847-1.1997, MOD)
GB 20007-2005 Safety of woodworking machines single-axis milling machine
JB/T 3105-1992 Woodworking single head straight tenon tenoning machine accuracy
Method 2003 Precision Acoustics Determination of sound pressure of sound power levels of noise sources anechoic and semi-anechoic rooms. ISO 3745
ISO /T R11688-1.1995 recommended design method of low - noise machinery and equipment - Part 1. Program
EN940.1997 Safety of woodworking machines combined machine
EN982.1996 Safety of machinery Safety and fluid system components required hydraulic device
EN983.1996 Safety of machinery Safety requirements for components for fluid systems and pneumatic means
EN1218-2.2004 Safety of woodworking machines tenoning machine Part 2. feed chain double-end tenoning machine
EN1218-3.2002 Safety of woodworking machines - Tenoning machines - Part 3. Construction timber with manual feed with traveling table tenoners
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1
Single head moving working table tenoning machine singleendtenoningmachineswithslidingtable
In one working cycle the machine is opened and the tongue at one end of the workpiece. Cutters and circular tenon is mounted on at least one spindle
The cutting blade is made.
3.2
Tenon tenon
End of the workpiece formed by cutting recesses or projections to engage the workpiece, and also comprising a shaped tenon.
3.3
Manual feed handfeed
GB 12557-2010 3.4.
3.4
Mechanical feed integratedfeed
GB 12557-2010 3.6.
3.5
Projectile ejection
GB 12557-2010 3.12.
3.6
Start time run-uptime
See GB 12557-2010 3.15.
3.7
Coasting time run-downtime
See GB 12557-2010 3.16.
3.8
Mechanical actuation mechanism machineactuator
Power generating means for causing mechanical movement.
3.9
Guarantee confirmation
See GB 12557-2010 3.17.
4 Schedule of Hazards
Dangerous table (see Table 2) relates to all the possible dangers of this machine.
--- important risk for, by a predetermined safety requirements and/or measures, or by indicating the appropriate class B standard;
--- For hazardous unimportant, such as general, the slave or secondary risk by indicating the appropriate class A standard, in particular
GB/T 15706.1 ~ 15706.2.
The danger is presented by GB/T 15706.1-2007 Chapter 4.
Table 1 Danger List
No. dangerous comply with the provisions of the standard
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
1.10
1.11
1.12
Mechanical hazards, such as those caused by the following elements of the machine part or a workpiece.
shape;
relative position;
Quality and stability (potential energy of elements);
Quality and speed (kinetic energy of elements);
Insufficient mechanical strength;
Potential energy caused by the accumulation of the following reasons.
An elastic member (spring), or liquid or gas under pressure, or vacuum.
Risk of crushing
Cut dangerous
Cutting or severing hazard
Wound danger
Introduction or involved in dangerous
Shock hazard
Stabbed or stabbed dangerous
Friction or abrasion hazard
High pressure fluid jet dangerous
(Mechanical or processed material/workpiece) member projection hazard
(Mechanical or mechanical parts) unstable
And machinery-related slips, dumping, fall risk
5.2.1,5.2.7,5.2.8
5.2.7,5.2.8
5.2.2,5.2.3,5.2.7,5.2.8
5.2.3,5.2.4,5.2.6,5.2.7
5.2.7,5.2.8
5.2.7
Not suitable
Not suitable
5.3.7,5.3.8
5.2.2,5.2.3,5.2.5,5.2.6,5.2.8
5.2.1.
Not suitable
TABLE 1 (cont.)
No. dangerous comply with the provisions of the standard
2.1
2.2
2.3
2.4
Electrical hazards, such as caused by the following factors.
An electrical contact (direct or indirect)
Static phenomenon
Heat radiation or other phenomena, such as the injection of the molten particles, short-circuiting, chemical effects, overload
External influences electrical equipment
5.3.4,5.3.15
Not suitable
Not suitable
5.1.1,5.3.4,5.3.12
3.1
3.2
Leading to dangerous heat
By flame or explosion one can contact and heat radiation burns and scalds
Due to the influence of heat or cold working environment on health
Not suitable
Not suitable
4.1
4.2
The risk arising due to noise.
Hearing loss (deafness), other physiological disorders (eg loss Ping Heng, loss of consciousness)
Interference language communication, auditory signals, etc.
5.3.2.
5.3.2.
5 generated by the vibration is not dangerous for
6 is not suitable for a risk (such as ion radiation) of radiation produced
7.1
7.2
7.3
When the machining, materials and substances used or generated by the discharge risk, for example.
Since the risk of unwanted contact with the suction liquid, gases, fumes and dust resulting
Fire or explosion hazard
Biological and microbiological (viral or bacterial) danger
5.3.3
5.3.1.
Not suitable
8.1
8.2
8.3
8.4
8.5
8.6
Ignore dangerous (human and mechanical characteristics and ability to match) Ergonomic generated in the design,
E.g.
Unhealthy posture or excessive force
Inappropriate to consider the human arm or foot/leg structure
Ignoring the use of personal protective equipment
Inappropriate face lighting
The spirit of too much tension or lack of preparation, etc.
Human error
5.1.2.
Pointless
6.3
Pointless
Not suitable
6.3
9 5.1.7 various dangerous combination
10.1
10.2
10.3
10.4
10.5
As energy failure, damage or risk of mechanical parts other malfunctions arising, for example.
Fault Energy (energy and/or control circuitry)
Fluid or mechanical parts accidentally thrown
A control system failure, failure (unexpected start, accidental overcurrent)
Assembly error
Mechanical overturn, unexpected loss of stability
5.1.10
5.2.5,5.3.15
5.1.11
6.3
5.2.1.
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
11.10
Due to security measures wrong or incorrect positioning of the danger arising, for example.
All kinds of protective devices
Various security-related (protection) devices
Start and stop means
Safety signals and signaling
All kinds of information and alarm means
Energy cutting device
Emergency stop devices
Workpiece feeding/extraction apparatus
Safety or adjustment and maintenance of major equipment and accessories
The exhaust gas feed device
5.2.7
5.1.1,5.2.7
5.1.2,5.1.3,5.1.4
6.1, 6.2
6.1,6.2,6.3
5.3.15
5.1.5
5.2.5
5.3.16
5.3.3
And/or safety requirements measures 5
Safety of machine tools addition to complying with the provisions of this standard, it must also comply with GB 12557, the provisions of GB/T 15706.1 ~ 15706.2 of.
Reduce risk by designing the relevant instructions according to GB/T 15706.2-2007 Chapter 4.
5.1 control and command means
Safety and reliability of control systems 5.1.1
This standard, the safety control system includes a manually operated from the initial to the final position sensors or the mechanical actuation mechanism
Or the input member (e.g., motor), such as a motor.
Safety control system of the machine are as follows.
--- start (see 5.1.3);
--- normal stopping (see 5.1.4);
--- Emergency Stop (see 5.1.5);
--- Interlock (see 5.2.7);
--- interlock with protection (see 5.2.7) locked;
--- triggering device (see 5.2.7);
--- opening and closing movement of the stage moving guard (see 5.2.7) in the following cases.
a) a failure occurs in the power source, ensure that the workpiece clamped state (see 5.2.8), and
b) feeding to the machine on the machine, in the case where no clamping a workpiece, should prevent movement of the table;
--- positioning spindle (see 5.2.3)
--- residual pressure was released (see 5.3.15);
--- In the case of power source failure, to prevent unintended operation (GB/T 15706.2-2007 in 4.11.5);
--- mode selection (see 5.1.7);
--- stop feeding (see 5.1.6);
--- lead to brake system (see 5.2.4).
These control systems should be at least "proven" components and "proven" principle shall be designed and manufactured.
This standard "validated" and refers to the principle elements.
a) electrical components shall comply with the relevant national standards, industry standards, including the following components.
--- forced disconnection control switches (position sensor for interlocking the guard as the mechanically operated) and an auxiliary
The road relay should meet the requirements of GB 14048.5;
--- for electromechanical contactors and motor starters on the main circuit should meet the requirements of GB 14048.4;
--- rubber insulated cables should meet the requirements of GB 5013.1;
--- by fixing (e.g. body mounted inside the machine bed) PVC cables against mechanical damage should meet GB 5023.1
Provisions.
b) circuit in principle, should be consistent with the first four measures GB 5226.1-2008 prescribed in 9.4.2.1, the circuit should be hard-wired.
If the safety control system used in electronic components, shall comply with the requirements in 9.4.2.2 GB 5226.1-2008.
c) mechanical parts shall comply with GB/T 15706.2-2007 in 4.5.
d) a position sensor guard device mechanically operating modes such as the use of a positive action, and it is connected and the cam arrangement and design
Installation should comply with GB/T 18831-2002 in 5.2.2 and 5.3.
e) interlock with locking protection should meet the requirements of 5.2.7.1.
f) pneumatic and hydraulic components and systems shall comply with EN983 respectively. the provisions of the 1996.1996 and EN982.
Inspection method. respective test pattern (including circuit diagrams) and tested on the machine; shall provide all components maker is issued membered
Parts comply with the appropriate standard warranty.
5.1.2 the position of the manipulator
A knife from the shaft, the major operator mechanical feed device for feeding the starting, stopping and the normal mode is selected, should be installed
Loading position.
The position of the stop means, see 5.1.5.
When the main power should be indicated, for example. by means of LEDs. It should be close to the start switch indicator, and fused start button, or provide
For two position switch.
Test Method. Check the corresponding pattern (including circuit diagrams). for the function test on the machine.
5.1.3 start
See GB 5226.1-2008 in 9.2.5.2.
For the purposes of this standard, "and active safety devices in place" by the interlock arrangement 5.2.7.1 achieved.
The "operation" refers to a rotation of the tool spindle and/or motorized adjustment, and/or motorized movable stage feed (if provided).
The mechanical artificial feeding machine feed, the duty cycle should not begin initiated or automatically initiated by the workpiece.
Shall be independently of each arbor motor starter.
If the spindle bearing is outboard bearing, should after installation, to start the spindle.
Test Method. Check the corresponding pattern (including circuit diagrams); for function tests on the machine.
5.1.4 Normal stop
The machine should be equipped with a manipulator normally stopped, it stops all machine actuation mechanism.
For mechanical feed tool, when moving the table back to the loading position, the actuator should enable the machine stop completely stopped.
Normal stop should manipulator independently of each arbor motor stop.
When the machine is equipped with a mechanical feed device and/or electrical brake and/or maneuvering the clamping device, the sequence should normally stopped.
--- Stop feeding (if powered drive);
--- the cutting blade to the power shaft of the motor;
--- lead to brake;
--- saw shaft back to the starting position (if applicable);
--- brake power cut, the use of the electric brake, the rotation of the spindle stop the power off after the brake (e.g., through
Over a time relay);
--- cut off the power to the motor clamping means (if provided).
Shutdown sequence should be achieved by a corresponding control circuit. The use of a time relay, the delay is at least equal to the minimum brake time.
The relay should be fixed or a delay adjustment means is sealed.
Normal shutdown sequence NA arbor non-cutting zone, but can be used for braking (see 5.1.6).
If the machine is equipped with a mechanical brake, stopping the normal control system should GB 5226.1-2008 9.2.2 0 class.
If the machine is equipped with an electric brake and/or motorized clamping device, the normal stop control system shall GB/T 5226.1-
2008 9.2.2 Class 1.
If the machine is equipped with process control, normal stop control system should be in line with 9.2.2 of class GB 5226.1-2008 2, then only for electricity
Sub-powered equipment.
On the manual feed machine, if the emergency stop button at least meets the above requirements, it may be considered to meet the requirements of the normal stop.
Test Method. Check the appropriate pattern and circuit diagram for the function test on the machine.
5.1.5 Emergency Stop
By mechanical feed of the machine, the manipulator stop material should be installed on the machine (and cutting) position, the operation on the operating position and can be seen at touch
And location.
If the machine is equipped with a mechanical brake, the emergency stop control system shall in GB 5226.1-2008 and 9.2.5.4 classes 0
GB 16754-2008 4.1.5 0 in class.
If the electrical machine is equipped with a brake and/or a motorized workpiece clamping device, the emergency stop control system shall GB 5226.1-
2008 Class 1 9.2.5.4 and 4.1.5 of GB 16754-2008 class 1.
On the manual feed machines, manipulator emergency stop should be installed in a moving stage is in any position, the operator can touch position.
Emergency stop order shall be required 5.1.4.
Test Method. Check machine corresponding pattern (including circuit diagrams), for the function test on the machine.
5.1.6 mechanical feed
When all spindles are rotating or non-rotating spindle to retreat into non-cutting area, and to meet the requirements of 5.2.8, the feed can be opened.
Test Method. Check the corresponding pattern (including circuit diagrams), for the function test on the machine.
5.1.7 Mode Selection
If a guard device for a motor operation for maintenance (including tool change) need to open, it should provide a mode selection switch. Mode Select On
Off should meet the following requirements.
A) After cutting the power to the blade shaft of the motor, the guard to open;
b) closing the guard, to the driving arbor.
c) cutting off the power to the feed;
d) releasing the brake;
e) cutting off the power to the main shaft positioning device.
When the mode select switch allows the power provided to the spindle positioning, should meet a) ~ d) requirements, but should maintain the momentum for the spindle positioning.
Start mode selection switch not only lead to any movement.
Test Method. Check the corresponding pattern (including circuit diagrams), for the function test on the machine.
5.1.8 change in speed
When the machine is equipped with a continuously variable arbor means (e.g. drive), the deviation of the actual rotational speed of the knife shaft not exceed 10% of the maximum speed.
The actual speed or output frequency can be adjusted by a comparator.
Test Method. Check the corresponding pattern (including a circuit diagram), the component manufacturer and guarantee proof.
5.1.9 Double command control
When the machine is equipped with two start manipulator, it shall comply with the provisions of GB/T 15706.2-2007 in 4.11.8e) of.
Test Method. Check the corresponding pattern (including circuit diagrams), for the function test on the machine.
5.1.10 power supply failure
Paragraph 1 after the re-start electrically driven machine tools to deal with power outages and subsequent recovery paragraph 3 in accordance with GB 5226.1-2008 7.5
For protection.
A motor with a workpiece clamping device of the machine, should a fault in the power source, holding pressure gas source, for example by using a check valve
To protection.
Test Method. Check the corresponding pattern (including circuit diagrams), on the machine function test accordingly.
5.1.11 control circuit failure
See 5.1.1.
5.2 Mechanical hazard protection
5.2.1 Stability
The machine measures should be fixed on the ground or other stable structures, such as a hole in the machine base.
Inspection method. check the corresponding pattern, for examination on the machine.
5.2.2 risk of breakage during operation
Application tool guard following materials.
a) tensile strength greater than steel --- equal to 350N/mm2, greater than a wall thickness equal to 2mm;
b) a light alloy --- Properties Table 2.
c) a wall thickness of greater than or equal Polycarbonate --- 3mm; or other plastic materials, impact strength not less than 3mm thick polycarbonate
Ester impact strength;
d) a tensile strength greater than or equal cast --- 200N/mm2, greater than the wall thickness is equal to 5mm.
Table 2 Light alloy tool guard material properties
Tensile strength limit /
(N/mm2)
Minimum wall thickness /
mm
For the mechanical feed for the machine, all the table is moved only in the power feeding position adjustment processing position of the arbor.
When adjusting the power cutter shaft, the cutter shaft should avoid contact with the respective portions of the machine tool, for example, by a manual mechanical adjustment suppressing means (see
GB 15706.1-2007 in 3.26).
Dynamic adjustment does not include a motion controlled cutting (see 5.1.6,5.2.3.4,5.2.3.7 and 6.3).
Inspection method. check the corresponding pattern, for examination on the machine, the material manufacturers provide check guarantee tensile strength.
5.2.3 Tool and structure of the toolholder
In addition the tool should meet the requirements of 6.3 GB 18955-2003, it must also meet the following requirements and recommended requirements of the Appendix A.
5.2.3.1 geometric characteristics
All radial runout and the end face of the cutter shaft runout should meet JB/T 3105-1992 requirements.
The tool mounting portion of the knife shaft diameter tolerance g6.
Test Method. Check the respective drawings, the machine for detection.
5.2.3.2 Strength
The tensile strength should be greater than or equal arbor 580N/mm2.
Test Method. Check the appropriate pattern and guarantee the steel manufacturer.
And the size of the knife arbor 5.2.3.3
Balancing arbor requirements see GB 1...
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