This part of GB/T8910 specifies the test method for measuring the vibration of the handle of hand-held power rock drills and rotary hammers. It determines the test procedure for the vibration of the handle when the tool under test is operating under a specific load condition. This part is applicable to rock drills and rotary hammers powered by pneumatic, hydraulic, internal combustion, and electric power. The measured results can be used to compare different or different types of tools of the same type. For heavy rock drills, although the vibration is measured under simulated operation, it is an assessment of the vibration in actual working conditions. GB/T 8910.3-2004 Method for measuring vibration of the handle of hand-held portable power tools Part 3: Rock drills and rotary hammers GB/T8910.3-2004 Standard download decompression password: www.bzxz.net

ICS13.160;25.140.01
National Standard of the People's Republic of China
GB/T8910.3—2004/IS08662-3:1992 replaces GB/T8910.3—1988
Handheld portable Power tools
Hand-held portable power tools-Measurement of vibrations at the handle-Part 3:Rock drills and rotary hammer
Hand-held portable power tools-Measurement of vibrations at the handle-Part 3:Rock drills and rotary hammer hammers(ISO8662-3:1992,IDT)
2004-06-09 ReleasedbZxz.net
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Administration
2004-12- 01Implementation
GB/T 8910.3--2004/ISO 8662-3:1992GB/T8910 "Measurement Method for Handle Vibration of Handheld Portable Power Tools" is divided into the following parts: 1. Part 1: General principles;||tt| |-Part 2: Shovel and Rivet Machine;
Part 3: Rock Drill and Rotary Hammer;
-Part 4: Grinder;
—Part 5: Pavement Breaking Pickaxes for machines and construction work; --- Part 6: Impact drills;
- Part 7: Impact, pulse, ratchet wrenches, screwdrivers and nut drivers; Part 8: Polishing machines and rotary orbitals , Special orbital grinder; Part 9: Tamping machine;
——Part 10: Punching and shearing;
Part 11: Nailing machine;
- Part 12: Band saws and files, swing or rotary saws; - Part 13: Grinders for molds;
- Part 14: Tools and needle rust removers for quarrying. This part is Part 3 of GB/T8910.
This part is equivalent to ISO8662-3:1992 "Measurement method for vibration of handles of hand-held portable power tools - Part 3: Rock drills and rotary hammers" (English version), including its amendments ISO8662-3:1992/Amd.1 : 1999. The revised content has been directly incorporated into the text and marked with vertical double lines (II) in the margins of the text. This section is equivalent to the translation of ISO8662-3:1992. This part has the same technical content as ISO8662-3:1992, but the following editorial changes have been made: 1. The preface and introduction of 1SO8662-3:1992 have been deleted; the informative Appendix B and Appendix C of ISO8662-3:1992 have been deleted; - Change some expressions applicable to international standards to expressions applicable to Chinese standards; - According to the provisions of GB/T1.1-2000, change the notes of some provisions in international standards to the provisions of this part. This Part replaces GB/T8910.3-1988 "Measurement Methods for Vibration Measurement of Rock Drilling Machinery and Pneumatic Tools - Measurement of Rotary Machines". Compared with GB/T8910.3-1988, the main changes in this part are as follows: only involves rock drills and rotary hammers;
---added a preface, introduction and normative appendix A; the standard name has been adjusted, and The name of IS08662-3:1992 is adopted. Appendix A of this part is a normative appendix.
This part is proposed by China Machinery Industry Federation. This part is under the jurisdiction of the National Rock Drilling Machinery Pneumatic Tools Standardization Technical Committee (SAC/TC173). This section was drafted by: Tianshui Rock Drilling Machinery Pneumatic Tools Research Institute. Drafters of this section: Zhu Runhui, Su Wei, Wei Wanjiang. The previous versions of the standard replaced by this part are: -GB 8910.3--1988.
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GB/T8910.3--2004/ISO8662-3: 1992 Introduction
GB/T8910 The working principle of the power tools involved in this section is that the needle drill bit periodically transmits energy to the drill rod in the form of impact while making a rotary motion.
When testing light rock drills (excluding the mass of the bit) and rotary hammers with a mass less than 15kg, test methods similar to those under typical working conditions can be used. For heavy rock drills with a mass greater than 15kg, due to the high cutting speed, a loading device - a steel ball energy absorber is used. The loading device simulates actual working conditions and can be tested repeatedly, so it is an economically feasible method.
The measurement results obtained by the test methods specified in this section have good reproducibility. The impact energy of rock drills and rotary hammers is determined by their internal design structures and is not affected by external forces. However, the prerequisite to ensure the smooth operation of the tool is to apply a certain shaft thrust to it. Ⅱ | | tt | Handle Vibration Measurement Methods Part 3: Rock Drills and Rotary Hammers
This part of GB/T8910 specifies the test methods for vibration measurement of the handles of hand-held power rock drills and rotary hammers. This test procedure determines the vibration magnitude of the handle when the tool under test is operated under a specific load state. This section applies to rock drills and rotary hammers (hereinafter referred to as tools) powered by pneumatic, hydraulic, internal combustion, and electric power. The measured results can be compared between different or similar models of tools. For heavy-duty rock drills, although the vibration magnitude is measured under simulated operations, it is an assessment of the vibration magnitude under actual working conditions. 2 Normative reference documents
The provisions in the following documents become the provisions of this part through the reference of this part of GB/T8910. For dated reference documents, all subsequent amendments (excluding corrigenda) or revisions do not apply to this section. However, parties to an agreement based on this section are encouraged to study whether the latest versions of these documents can be used. . For undated referenced documents, the latest version applies to this section.
GB/T5621 Rock drilling machinery and pneumatic tools performance test method (eqvISO2787:1984, Rotaryandpercussivepneumatic tools—Performance tests)GB/T8910.1-2004 Handheld portable power tool handle vibration measurement method Part 1: General (ISO8662- 11988, IDT)
GB/T14790 Measurement and evaluation method of human hand-transmitted vibration (eqvISO5349) ISO679 Test method for cement Determination of cement strength 3 Measured quantity
The following is the measured quantity:|| tt||a) The root mean square (rms) acceleration shall be expressed in accordance with the provisions of 3.1 in GB/T8910.1-2004; the weighted acceleration shall be obtained in accordance with the provisions of 3.3 in GB/T8910.1-2004; the frequency analysis shall be in accordance with GB/T8910.1-2004 /T8910.1-2004 in accordance with the requirements of 3.2. If other methods can be used to prove that there are no repeated signals, frequency analysis does not need to be performed; power supply voltage, compressed air pressure or hydraulic oil pressure; b)
c) Impact frequency;
d) propulsion.
4 Using instruments
4.1 General
The technical requirements for using instruments should comply with the provisions of 4.1~4.6 in GB/T8910.1-2004. 4.2 Sensor
The technical requirements of the sensor should comply with the provisions of 4.1 in GB/T8910.1--2004. For lightweight (e.g. plastic) handles, a sensor with too much mass should not be used. If the handle itself acts as a mechanical filter, the lightweight sensor can be directly bonded to the fixed surface of the handle, and its mass should be less than 5g. 4.3 Fixing of sensors
The fixing of sensors and mechanical filters should comply with the provisions of 4.2~4.3 in GB/T8910.1-2004 (see Figure 1). 1 | | tt | It is not necessary to use mechanical filters (see 4.3 in GB/T8910.1-2004). 4.4 Auxiliary instruments
An instrument measuring the root mean square value should be used to measure the power supply voltage of the power tool. A precision pressure gauge should be used to measure air pressure or hydraulic oil pressure. A force measuring scale may be used to determine propulsion force (see 6.3). 4.5 Calibration
Calibration should be in accordance with GB/T8910.1--2004 4.8. 5 Measurement direction and position
5.1 Measurement direction
The measurement shall be carried out in the direction parallel to the axis of the drill bit, i.e., in the Z direction (see Figure 1). Appendix A specifies the direction in which the basic center coordinate system of the relevant measured tool is established.
According to the requirements of GB/T14790, measurements shall be carried out in three directions as specified in Appendix A. 5.2 Measurement position
The measurement position shall be located on the main handle that the operator normally holds and applies the propulsion force. The sensor shall usually be placed at 1/2 of the length of the main handle. For tools with ring handles, curved handles or gun handles, it is impossible to place the sensor at 1/2 of the length of the handle due to the setting of the trigger. In this case, the sensor shall be placed as close as possible between the thumb and index finger (see Figure 1). -z axis;
a main handle;
3.--…-needle head axis;
4---pressing surface;
5--—throat clamp;
6——welded nut;
-mechanical filter;
sensor.
a) rock drill
fixed position and measuring direction of sensor
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1 sensor is directly bonded to the tool or adapter; Z axis:
3-main handle;
a secondary handle;
drill head axis.
1—z axis;
2—main handle;
3—-secondary handle;
4—drill head axis.
b) Heavy rotary hammer
c) Light rotary hammer
Figure 1 (continued)
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GB/T 8910.3—2004/ISO 8662-3:19926Operation procedure
6.1 General
The measurement should be carried out on a new tool that is well lubricated and in normal operation. For electric, hydraulic and internal combustion powered tools, it is advisable to run them for about 10 minutes before measurement so that the machine is in thermal equilibrium. This is not necessary for pneumatic tools.
The calibrated power source, such as rated voltage or air pressure, should remain unchanged during the test and be used as required by the manufacturer. During the entire measurement period, the machine should be kept running smoothly (see 6.3). When measuring, performance indicators such as the rotational speed of the tool should be adjusted according to the manufacturer's instructions and matched to the drill bit used. The drill bit should be kept rotating.
When measuring, the test piece or energy absorber should be positioned so that the operator can stand upright and operate the machine vertically downward (see Figures 2 and 3). 1—Operator standing on the dynamometer.
Figure 2 Working position of the operator when testing the rotary hammer
Energy absorber;
Operator standing on the dynamometer.
6.2 Loading device
6.2.1 Rotary hammer and light rock drill
GB/T8910.3--2004/ISO8662-3:1992 Figure 3 Operator's working position when testing a rock drill During the measurement, the operator shall hold the machine and drill into an unreinforced rectangular concrete block (loading device) with a compressive strength of at least 40 MPa (after the concrete has solidified for at least 28 days) and a maximum particle diameter of 16 mm. The compressive strength of the rectangular concrete block shall be determined in accordance with ISO679.
The size of the rectangular concrete block shall be at least 800 mm × 500 mm × 200 mm and shall be placed flat on a shock-absorbing material (such as sand insulation pads or thick wooden boards) to level out uneven areas. This placement will not cause obvious resonance. 6.2.2 Heavy rock drill
For heavy rock drills with a mass greater than 15 kg, an energy absorber shall be used as the loading device. The energy absorber should avoid energy reflection as much as possible, and the reflected energy should not exceed 20% of the incident wave energy. The energy absorber consists of a steel tube with a hardened steel ball inside. The steel tube is firmly fixed on a hard base plate with a mass of at least 300kg to prevent it from rebounding. From the upper end of the energy absorber, a test drill rod is inserted to support the steel ball, and the tool under test is connected to the test drill rod for operation test. The heat treatment hardness of the steel tube should be 62HRC ± 2HRC or 750HV ± 10HV, the heat treatment hardness of the anvil and the test drill rod should be 55HRC ± 2HRC, and the heat treatment hardness of the steel ball should be greater than 63HRC. If the measurement duration is long, the test system should be cooled. Figure 4 illustrates the specifications of an energy absorber (loading device) and a test drill rod. The diameter D of the steel tube should be 60mm, the diameter of the steel ball should be 4mm, and the height H of the steel ball column should be 150mm.
Erhai brand
Water City Book
GB/T 8910.3—2004/ISO 8662-3:1992 Concrete slab with a mass of at least 300kg.
6.3 Propelling force
Figure 4 Energy absorber
In addition to the weight of the tool under test, the propulsion force applied to it should be vertically downward so that the drill rod does not contact the fixed sleeve of the energy absorber, so as to ensure that the tool under test operates smoothly within the normal performance range. The propulsion force FA usually applied, expressed in Newton (N), is about 15 times the mass of the tool under test (kilograms, kg), and should be greater than 80N and less than 200N.
Example: If the mass of the tool under test is 12kg, the propulsion force should be about 180N. During measurement, the operator stands on the dynamometer to control the propulsion force FA. At this time, the propulsion force is the weight of the operator minus the reading on the dynamometer. 6.4 Drill bit
For rotary hammers, the drill bit recommended by the manufacturer should be used. The effective depth of the drill rod and the drill bit diameter should be selected according to Table 1. Table 1 Drill bit size selection based on drill tail diameter Drill tail diameter
d≤12
123--2004/ISO8662-3:1992 Figure 3 Operator's working position when testing a rock drill During the measurement, the operator shall hold the machine and drill into an unreinforced rectangular concrete block (loading device) with a compressive strength of at least 40 MPa (after at least 28 days of concrete setting) and a maximum particle diameter of 16 mm. The compressive strength of the rectangular concrete block shall be determined in accordance with ISO679.
The rectangular concrete block shall have a size of at least 800 mm × 500 mm × 200 mm and shall be placed flat on a shock-absorbing material (such as sand insulation pads or thick wooden boards) to level out uneven areas. This placement will not produce obvious resonance. 6.2.2 Heavy rock drills
For heavy rock drills with a mass greater than 15 kg, an energy absorber shall be used as the loading device. The energy absorber shall have as little energy reflection as possible and the reflected energy shall not exceed 20% of the incident wave energy. The energy absorber consists of a steel tube with a hardened steel ball inside. The steel pipe is firmly fixed on a hard base plate with a mass of at least 300kg to prevent it from rebounding. From the upper end of the energy absorber, a test drill rod is inserted to support the steel ball, and the tool under test is connected to the test drill rod for running test. The heat treatment hardness of the steel pipe should be 62HRC ± 2HRC or 750HV ± 10HV, the heat treatment hardness of the anvil and the test drill rod should be 55HRC ± 2HRC, and the heat treatment hardness of the steel ball should be greater than 63HRC. If the measurement duration is long, the test system should be cooled. Figure 4 illustrates the specifications of an energy absorber (loading device) and a test drill rod. The steel pipe diameter D should be 60mm, the steel ball diameter is 4mm, and the steel ball column height H is 150mm.
Erhai Brand
Water City Book
GB/T 8910.3—2004/ISO 8662-3:1992 Concrete slab with a mass of at least 300kg.
6.3 Propulsion force
Figure 4 Energy absorber
In addition to the weight of the tool under test, the propulsion force applied to it should be vertically downward so that the drill rod does not contact the fixed sleeve of the energy absorber, so as to ensure that the tool under test operates smoothly within the normal performance range. The propulsion force FA usually applied, expressed in Newton (N), is about 15 times the mass of the tool under test (kilograms, kg), and should be greater than 80N and less than 200N.
Example: If the mass of the tool under test is 12kg, the propulsion force should be about 180N. During measurement, the operator stands on the dynamometer to control the propulsion force FA. At this time, the propulsion force is the weight of the operator minus the reading on the dynamometer. 6.4 Drill bit
For rotary hammers, the drill bit recommended by the manufacturer should be used. The effective depth of the drill rod and the diameter of the drill bit should be selected according to Table 1. Table 1 Select drill bit size according to drill tail diameter. Drill tail diameter
d≤12
123--2004/ISO8662-3:1992 Figure 3 Operator's working position when testing a rock drill During the measurement, the operator shall hold the machine and drill into an unreinforced rectangular concrete block (loading device) with a compressive strength of at least 40 MPa (after at least 28 days of concrete setting) and a maximum particle diameter of 16 mm. The compressive strength of the rectangular concrete block shall be determined in accordance with ISO679.
The rectangular concrete block shall have a size of at least 800 mm × 500 mm × 200 mm and shall be placed flat on a shock-absorbing material (such as sand insulation pads or thick wooden boards) to level out uneven areas. This placement will not produce obvious resonance. 6.2.2 Heavy rock drills
For heavy rock drills with a mass greater than 15 kg, an energy absorber shall be used as the loading device. The energy absorber shall have as little energy reflection as possible and the reflected energy shall not exceed 20% of the incident wave energy. The energy absorber consists of a steel tube with a hardened steel ball inside. The steel pipe is firmly fixed on a hard base plate with a mass of at least 300kg to prevent it from rebounding. From the upper end of the energy absorber, a test drill rod is inserted to support the steel ball, and the tool under test is connected to the test drill rod for running test. The heat treatment hardness of the steel pipe should be 62HRC ± 2HRC or 750HV ± 10HV, the heat treatment hardness of the anvil and the test drill rod should be 55HRC ± 2HRC, and the heat treatment hardness of the steel ball should be greater than 63HRC. If the measurement duration is long, the test system should be cooled. Figure 4 illustrates the specifications of an energy absorber (loading device) and a test drill rod. The steel pipe diameter D should be 60mm, the steel ball diameter is 4mm, and the steel ball column height H is 150mm.
Erhai Brand
Water City Book
GB/T 8910.3—2004/ISO 8662-3:1992 Concrete slab with a mass of at least 300kg.
6.3 Propulsion force
Figure 4 Energy absorber
In addition to the weight of the tool under test, the propulsion force applied to it should be vertically downward so that the drill rod does not contact the fixed sleeve of the energy absorber, so as to ensure that the tool under test operates smoothly within the normal performance range. The propulsion force FA usually applied, expressed in Newton (N), is about 15 times the mass of the tool under test (kilograms, kg), and should be greater than 80N and less than 200N.
Example: If the mass of the tool under test is 12kg, the propulsion force should be about 180N. During measurement, the operator stands on the dynamometer to control the propulsion force FA. At this time, the propulsion force is the weight of the operator minus the reading on the dynamometer. 6.4 Drill bit
For rotary hammers, the drill bit recommended by the manufacturer should be used. The effective depth of the drill rod and the diameter of the drill bit should be selected according to Table 1. Table 1 Select drill bit size according to drill tail diameter. Drill tail diameter
d≤12
12
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