GB/T 26548.11-2021Hand-held portable power tools - Test methods for evaluation of vibration emission - Part 11: Stone hammers (English PDF)

Foreword

This document is in accordance with GB/T

1.1-2020 "Standardization Work Guidance Part 1.Structure and Drafting Rules of Standardization Documents"

Drafting.

This document is GB/T

Part 11 of 26548.GB/T

26548 has released the following parts.

---Part 1.Angle and end face grinders;

---Part 2.Gas trigger, nut wrench and screwdriver;

---Part 3.Polishing machines, rotary, sliding and compound polishing machines;

---Part 4.Straight shank grinder;

---Part 5.Drills and impact drills;

---Part 6.Compaction machine;

---Part 7.Punching machines and scissors;

---Part 8.Reciprocating saws, polishing machines and files, and pendulum or rotary saws;

---Part 9.Derusting hammer and needle beam derusting device;

---Part 10.Impact rock drills, hammers and breakers;

---Part 11.Stone Hammer;

---Part 12.Mold grinder.

The translation method used in this document is equivalent to ISO

28927-11.2011 Part 11 of Handheld Portable Power Tools Vibration Test Methods

Points. Stone Hammer.

The Chinese documents that have consistent correspondence with the normatively cited international documents in this document are as follows.

---GB/T

5621-2008 Rock drilling machinery and pneumatic tools performance test method (ISO

2787.1984, MOD)

---GB/T

6247.1-2013 Rock Drilling Machinery and Portable Power Tools Terminology Part 1.Rock Drilling Machinery, Pneumatic Tools and

Pneumatic machinery (ISO

5391.2003, MOD)

---GB/T

6247.2-2013 Rock Drilling Machinery and Portable Power Tools Terminology Part 2.Hydraulic Tools (ISO

17066.

2007, IDT)

---GB/T

14790.1-2009 Mechanical vibration. Measurement and evaluation of human exposure to hand-borne vibration. Part 1.General requirements

(ISO

5349-1.2001,IDT)

---GB/T

14790.2-2014 Mechanical vibration Measurement and evaluation of human exposure to hand-borne vibration Part 2.Workplace

Practical Guide to Measurement (ISO

5349-2.2001, IDT)

---GB/T

25631-2010 Mechanical vibration Hand-held and hand-guided mechanical vibration evaluation rules (ISO

20643.2005,

IDT)

This document has made the following editorial changes.

---According to the specific conditions of the normatively cited documents in this document, the ISO in Chapter 2

5391 .2003 changed to ISO

5391;

---Convert the "bar" in the international standard to "MPa" (1

bar=0.1

MPa).

Introduction

In order to measure the vibration radiation value of the handle of the handheld portable power tool in expected use, to evaluate and manage the operation of the operator in the use of the machine

The risk of vibration damage faced by the industry, the International Organization for Standardization intends to formulate ISO

28927 is a 13-part document. Has been released so far

The 12-part document, and the 13-part document is under development. China's plan to ISO

The 13 partial documents of 28927 are all adopted identically.

Set as GB/T

26548 corresponds to each part of the file. GB/T

26548 is proposed to be constituted as follows.

---Part 1.Angle and end face grinders. Covers hands equipped with protective covers for grinding, cutting and rough grinding on various materials

Holding machine.

---Part 2.Gas trigger, nut wrench and screwdriver. Covers hand-held machines for tightening and loosening threaded fasteners.

---Part 3.Polishing machines, rotary, sliding and compound polishing machines. Covers the purpose of surface treatment rather than removal of material

Purpose of the handheld machine.

---Part 4.Straight shank grinder. Covers the use of various flat grinding wheels, double bevel grinding wheels, and core grinding heads on various materials

Hand-held machine for grinding and surface finishing operations.

---Part 5.Drills and impact drills. Covers hand-held machines that drill holes in various materials through rotation and impact.

---Part 6.Compaction machine. Covers hand-held machines for foundry sand compaction or stamping operations.

---Part 7.Punching machine and scissors. Covers hand-held machines for cutting sheet metal and composite materials.

---Part 8.Reciprocating saws, polishing machines and files, and pendulum or rotary saws. Covers the table with a file or polishing tool installed

Hand-held machines for surface trimming, hand-held machines for sawing boards, medical plaster or wood, or

Hand-held machines for saw blades of various materials, as well as hand-held machines for cutting metal and composite materials.

---Part 9.Derusting hammer and needle beam derusting device. Covers the use of reciprocating working tools or needle bundles to remove oil from various materials

Hand-held machines with lacquer, rust spots or oxide skin.

---Part 10.Impact rock drills, hammers and breakers. Covers hand-held rotation for drilling holes in hard materials such as rock and concrete

Impact machine.

---Part 11.Stone Hammer. Covers stone hammer type hand-held machines, which are usually pneumatic straight-handled machines.

---Part 12.Mold grinder. Covered by hard alloy burr knife or grinding head mounted on the chuck in hard steel/plastic, etc.

Material, a hand-held machine for trimming operations.

---Part 13.Fastener drive tools. Covers handheld machines for fastener drive.

This document is ISO

Class C standards specified in 12100.

For machines designed and manufactured in accordance with the requirements of Type C standards, when the requirements of Type C standards are different from those in Type A or Type B standards

At this time, the requirements in the C-type standards are better than those in other types of standards.

GB/T

The general technical conditions for hand-held and hand-guided mechanical vibration measurement are given in 25631, GB/T

26548 (all parts) to

Based on this standard, it gives a vibration test method for hand-held portable machines, and specifies the operating conditions of the machine under type test conditions and the

Other requirements for type test performance. Its standard structure and chapter number are the same as GB/T

25631 unanimous.

This document adopts the European series of standards EN

The sensor reference positioning method used for the first time in 60745, due to continuity reasons

Description and GB/T

25631 is inconsistent. The sensor is preferably placed in the area between the thumb and index finger near the hand, because this position is right.

The operator has minimal interference when holding the machine.

Generally, the vibration produced by the stone hammer varies greatly during use. For stone hammers, the main source of vibration is impact, and its vibration characteristics are

The difference is caused by the operation of the machine and the difference in the materials processed. The difference in supporting materials can also cause differences in vibration. This document

The working procedure used is that the machine works on the surface of the stone. In order to improve the reproducibility of test results, the stable support and insertion of test materials

The good condition of the equipment is very important.

28927-11.2011

The value obtained is the type test value, which is used to represent the average value of the upper quartile of the typical vibration of the machine in actual use. However,

Actual values sometimes vary greatly, depending on many factors, including the operator, work tasks, and insertion tools or consumables. The machine itself

The maintenance status may also be important. In real working conditions, the impact of operators and operating procedures on low-amplitude vibration is particularly serious. because

Therefore, less than 2.5

The vibration radiation value of m/s2 is not recommended for evaluation under real working conditions. In this case, 2.5 is recommended

m/s2

The vibration value is used to directly evaluate the vibration of the machine.

If a specific workplace requires precise values, then it is necessary to press GB/T under this working condition

14790 (all parts)

Line measurement. The measured vibration value under actual working conditions may be higher or lower than the value obtained with this document.

In actual working conditions, excessive wear or bending of the insertion tool is prone to high vibration.

28927-11.2011

Vibration test method for handheld portable power tools

Part 11.Stone Hammer

1 Scope

This document specifies the test method for hand-transmitted vibration measurement at the handle of the hand-held portable stone hammer, and determines the operation of the stone under the type test state.

The type inspection procedure of the vibration level of the gripping part of the handle when hammering. The measured results are used to compare the vibration of different types of machines of the same form

size.

This document applies to engraving pens and mason hammers driven by compressed air or other methods (see Chapter 5).

This document does not apply to hammer machines used for demolition in construction projects, or air shovel used for metal materials.

Note.

To avoid confusion between "power tools" and "insertion tools",

Throughout this document, "machines" are used instead of "power tools".

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations

Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to

This document.

ISO

2787 Rotary and impact pneumatic tools performance test (Rotary

and

percussive

pneumatic

tools-Perfor-

mance

tests)

ISO

5349 (all parts) Mechanical vibration Measurement and evaluation of human body exposure to hand-borne vibration (Mechanical

vibration-

Measurement

and

evaluation

of

human

exposure

to

hand-transmitted

vibration)

ISO

5391 Pneumatic Tools and Machinery Vocabulary (Pneumatic

tools

and

machines-Vocabulary)

ISO

17066 Hydraulic Tool Vocabulary (Hydraulic

tools-Vocabulary)

ISO

20643.2005 Mechanical Vibration Evaluation Rules for Hand-held and Hand-guided Mechanical Vibration (Mechanical

vibration-

Hand-held

and

hand-guided

machinery-Principles

for

evaluation

of

vibration

emission

EN

12096 Marking and Verification of Vibration Radiation Value of Mechanical Vibration (Mechanical

vibration-Declaration

and

verifica-

tion

of

vibration

emission

values)

3 Terms, definitions and symbols

ISO

5391, ISO

17066, ISO

The terms, definitions and symbols defined in 20643 and below apply to this document.

5391 .2003, 2.2.6, modified]

3.1.2

Chisel

An insertion tool with a straight blade for trimming stones.

28927-11.2011