xjj--50 （60，70，90钳口）

Chengde Jinjian Testing Instrument Co.,Ltd No.14 High-tech Development Zoon, Chengde 067000 Hebei Province, China Tel: 86-314-5909029 Fax:86-314-2121898

Charpy Impact Tester

XJJ Series Operation Instructions

The subject of this document is the exclusive property of Jinjian.

This document or any part thereof must not be copied in any form,

nor information contained therein disclosed to third parties nor

methods, procedures or test described therein performed, without

the written permission of Jinjian Testing Instrument Co., Ltd.

XJJ series Charpy Impactor Operation Instructions Ed.1, rev.1 Page 1

TABLE OF CONTENTS SECTION 1INTRODUCTION 1.1 GENERAL 1.2 TEST PRINCIPLE AND MEASURING METHOD 1.3 TECHNICAL CHARACTERISTICS 1.4 WORKING CONDITION 1.5 SAFETY SECTION2OPENING INSPECT AND PLACEMENT 2.1 OPENNING INSPECT 2.2 MOVING 2.3 PLACEMENT SECTION3OPERATING TOOLS AND ACCESSORIES 3.1 FRAME 3.2 CHARPY VICE 3.3 DIAL MECHANISM 3.4 HAMMER RELEASE SYSTEM SECTION4PREPARATION 4.1 HAMMER RELEASE SYSTEM 4.2 LEVELING 4.3 FITTING THE HAMMER 4.4 TEST SPECIMEN PREPARATION SECTION 5PROCEDURE 5.1 LEVELING 5.2 POWERING ON 5.3 ASSEMBLY THE HAMMER 5.4 DIAL MECHANISM OPERATION 5.5 CHOOSING THE HAMMER 5.6 CENTRING DEVICE AND ITS USAGE 5.7 CHARPY VISE INSTLLATION AND SPECIMEN INSTLLATION 5.8 RELEASE THE HAMMER 5.9 CALCULATION 6 TEST REPORT 7 MAINTENANCE 8 APPEARANCE OF THE TESTER


IMPORTANT SAFETY INSTRUCTIONS

Read of these instructions carefully before operating the instrument

1. Save these instructions for future reference.

2. Follow all warnings and instructions that are marked on the

instrument.

3. Do not use this instrument near water.

4. Do not place the instrument on an unstable cart, stand or table.

5. Only operate the instrument from the type of power source indicated

on the label.

6. For safety, this product is equipped with a three-wire grounding type

plug. This plug will only fit into a grounding type power outlet. If you

are unable to insert the plug into the outlet, contact your electrician to

replace the outlet with the proper type. Do not defeat the purpose of

the grounding-type plug.

7. Do not allow anything to rest on the power cord. Do not locate this

product where persons will walk on the cord.

8. If an extension cord is used with this product, make sure that the total

ampere ratings of the product(s) plugged into the extension cord do

not exceed the extension cord ampere rating.

9. This apparatus can be used by skilled, trained and authorized

personnel only.

10. Do not attempt to service this product yourself.

11. Refer all servicing to Chengde JinJian Testing Instrument Co.,Ltd

Technical Support Staff:

CHENGDE JINJIAN TESTING INSTRUMENT CO.,LTD

No.14 High-technology Development Zone

Chengde City 067000


Hebei Province

China

Phone: (086) 0314-5909029

Fax: (086) 0314-2121898

E-mail: [email protected]

12. Visit us on the web: http://www.jinjian-test.com.cn

13. While the release pin is being actuated, do not place your hands or

any objects in the zone coinciding with coinciding with the hammers

trajectory.


SECTION 1INTRODUCTION 1.1 GENERAL

The CHARPY Impactor is a device widely used to conduct resilience tests on rigid thermoplastic moulding and extrusion materials, rigid thermosetting moulding materials and fibre-reinforced thermosetting and thermoplastic composites, in order to determine their impact fragility characteristics under standard stress conditions. It is made of a robust steel structure, on which the components intended for conduction of the test are mounted. This impactor is certificated that conforms to GB/T 1843, ISO 179-1 and the equivalent.

1.2 TEST PRICIPLE AND MEASURING METHOD The test specimen, supported as a horizontal beam, and is broken by a single impact oscillation of the pendulum, where the line of impact is central to the two supports. The measuring method is based on determining the amount of energy, expressed in Joules, needed to break the specimen under specified conditions, such as: location of the specimen, shapes of the notch and speed of impact of the hammer on the specimen. As the maximum potential energy of the pendulum is known, and is in relation to the weight of the hammer used and the drop height, the latter in turn being in relation to the starting angle, it results that the energy absorbed by the specimen in order to break it can be determined by measuring the hammer rise angle after impact.

There are also other parameters that affect this value, such as vibrations of the arm and its structure, friction between the various moving members, aerodynamic friction. In order to make the measurements repeatable, these disturbance factors must be kept under control and to within determined tolerances establishes by the international standards.

1.3 TECHNICAL CHARACTERISTICS

Overall dimensions Apparatus(LDH) : 550300850(mm) Weight Net weight : 152kg


Electrical power supply

Voltage : 220VAC-15%~220VAC+10%50Hz Work characteristics Potential energy : 7.5J, 15.0J, 25.0J and 50J of XJJ-50 type 0.5J ,1.0J, 2.0J, 4.0J, 5.0J of XJJ-5 type

Impact speed : XJJ-5 2.9m/s XJJ-50 3.8m/s

The raising angle above the horizontal: 150 1.4 WORKING CONDITION

1.4.1 Room temperature: 20~35 1.4.2 Relative humidity: 30%~80%

1.4.3 Without corrosive medium in working environment

1.4.4 Fixed on firm base without vibration 1.4.5 Working without strong electromagnetic interfere, strong air blow or

convection. 1.5 SAFETY

This testing machine is provided with a fixed guard, which is screwed to the frame. It is important that you should not place your hands or any objects in the coinciding with the hammers trajectory. This testing machine can be used by skilled, trained and authorized personnel only.


SECTION 2OPENING INSPECT AND PLACEMENT

2.1 OPENING INSPECT

Before opening inspect packaging for transit damage. Check that

pack is not distorted and contents appear to be secured. If the

transit damage results in the damage of the instrument, please

contact with the shipping company and inform our company at once.

Do not cope with it yourself.

When moving the instrument, avoid intense oscillation and

mechanical damage.

2.2 MOVING

Locate the packing list and carefully uncrate and remove all packing

materials from around the machine. Carefully remove the machine

from the crate. This instrument has provided with one eyebolt with

which it can be gripped and lifted during the handling stages.

2.3 PLACEMENT

Placement must be carried out according to the instructions by

trained personnel, who will be qualified mechanics or electricians,

as is appropriate from case to case.

The instrument should locate on firm table with a proper

height(suggest a firm base of dimension 500mm400mm 600mm could hold the weight of 152kg).

If the instrument is being put into storage, the environment must be

similar to its work environment.


SECTION 3IDENTIFICATION OF THE COMPONENTS

This pages that follow comprise a number of figures of the

apparatus, showing location and identification of its main parts.

This instrument consists of the following parts: the frame, CHARPY

Vice, dial mechanism, hammer release system.

3.1 Framebuilt with steel, which is mounted a vise for holding the

specimen and to which is connected a pendulum-type hammer. In

addition, there is a level meter on it.

3.2 CHARPY Vice Used to support the test specimen.

Charpy Vice

1Base 2Block 3Vice

4Screw

3.3 Dial mechanismindicating the energy after breaking the specimen.

It consists of two dials, the active pointer and the passive pointer,


the screw cap and its setscrew.

There are three kinds of scales on the dial, the inner scale, the outer

scale and the angle scale.

The back dial could be rotated by hand. We could select impact energy

by rotating the back dial.

As for XJJ-50 Charpy Impact tester, we should use the outer scale for

reading data.

For example, if we use 25J hammer to impact specimen, the outer scale

of the dial should be located as the following picture(at this moment, the

hammer should be free hanging). The passive pointer should be vertical

with 0 degree and the max.energy 25 J in the outer scale. Then raise the

hammer (at this moment, the pointers should point to 150).


The position of the pointers when the hammer is free hanging

3.4 Hammer release systemconsists of Charpy hammers and sets of

extra weights, a hammer stop ratchet, hammer release knob, rotation

shaft and an impact button (White).

Charpy hammer and set of extra weights

1Dowel 2Screw 3Hammer

Impact Button


SECTION4PREPARATION FOR TEST

4.1 REQUIRMENT FOR WORK TABLE

Make sure the instrument has been put on a perfectly flat and

capable of bearing the weight indicated (152kg).

4.2 LEVELING

Adjust the feet on the bottom of the instrument until the level bubble

is centered.

4.3 FITTING THE HAMMER

There are different kinds of energy hammers for XJJ-5 model: 0.5J,

1.0J, 2.0J, 4.0J, 5.0J; XJJ-50 model: 7.5J, 15.0J, 25.0J, 50.0J.

They are supplied according to the customers requirements.

In addition, a pair of extra weights is provided in order to increase

the potential energy of the hammer. Their weights must be secured

to the two sides of the hammer with four screws, using the hex

wrench provided.

Select the hammer with an appropriate energy value, according to

the requirements of the standard being used.

Unscrew the four screws of the dowel and remove the dowel from

the hammer. Lift the hammer and place it in the centre of the rotation

shaft. The hammer must have its impact edge facing the vice. Turn

the shaft until the centring hole is aligned with the pin in the hammer.

Set the dowel on the shaft. Secure it to the hammer with four screws

of the dowel, using the hex wrench provided.

4.4 TEST SPECIMEN PREPARATION

Specimens shall be prepared in accordance with the relevant

material specification and relevant standards. Four types specimens


are suggested.

4.4.1 Dimension of the suggested specimen

Table 1 Type Length(mm) Width(mm) Thickness(mm) Support Span L(mm)

1 802 10.00.5 40.2 60 2 501 60.2 40.2 40 3 1202 150.5 100.5 70 4 1252 130.5 130.5 95

Note: We marked the span and centering device according to GB/T

which is same as ISO.

4.4.2 Notch of the specimen

Type A: the included angle of the notch shall be 451 with a

radius of curvature at the apex of 0.250.05mm.

Type B: the included angle of the notch shall be 451 with a

radius of curvature at the apex of 10.05mm.

Type C: the included angle of the notch shall be 451 with a

radius of curvature at the apex of 0.10.02mm.


SECTION5PROCEDURE

Conduct the test in the same atmosphere as that used for conditioning,

unless otherwise agreed upon by the interested parties, e.g. for testing

at high or low temperatures.

5.1 Leveling

Adjust the four feet of the instrument till the level bubble is centered.

5.2 Powering on

To put the instrument into operation, make a sight check that the

instrument and its components are in good condition and in the

correct position.

Press the Impact Button and check the Hammer stop ratchet is in

good condition or not.

5.3 Assembly the hammer

Fitting the hammer to the instrument according to 4.3.

5.4 Dial mechanism operation

First, choose the outside indicated scale.

The energy of the hammer must be conformity with The max.

energy point on the dial scale, if not, rotate the back Dial meanwhile

zero setting. For example, if we choose 25 J hammer to impact the specimen.

The dial display should be set as the following two pictures:


Caution: when the hammer is free hanging, the passive pointer should


be vertical with the 0 point on the Dial and the two pointers

should be closely, if not, you can adjust the active pointer

slightly. If too much difference, unscrew the setscrew and the

screw cap, adjust the two pointers till they are in perfect

relationship. 5.5 CHOOSING THE HAMMER

Select the hammer with an appropriate energy value, according to

the requirements of the standard being used. Two hammers and two

pairs of extra weights are provided. These two pairs of weights must

be secured to the two sides of the hammer.

Caution: Check that the impact tester is able to perform the test with the

specified velocity of impact and that it is in the correct range of absorbed

energy W which shall be between 10% and 80% of the available energy

at impact, E. If more than one of the pendulums conform to these

requirements, the pendulum having the highest energy shall be used. 5.6 CENTRING DEVICE AND ITS USAGE Choose the proper Charpy vise according to the specimen dimension.

Then choose the Centring Device according to the charpy vise. Two

kinds of Centring Device are supplied which has a numerical sign as the

following picture shows:


Centre the vise and the impact edge by the Centring Device as the

above picture shows. Take away the Centring Device before installation

specimen.

5.7 CHARPY VISE INSTLLATION AND SPECIMEN INSTLLATION

Loose the screws of the Block as the 3.2 Vice picture shows. Take away

the installed vise and replace it of a new one. Center the vise by the

Centring Device and tight the screws. Last Center the vise and impact

edge as 5.5 picture shows. Place the prepared specimen, supported as a horizontal beam. 5.8 RELEASE THE HAMMER


When all the above steps are ready a test can be done now. Put the hammer on the Hammer stop Ratchet, meanwhile the two pointers are in

its normal starting position, if not, a slight adjustment should be taken by

tapping the screw cap gently. You can release the hammer by pressing

the Impact Button(As the following picture shows) on the base, or by

pressing the release knob located on the top of the apparatus. Then

record the dial reading breaking energy for a specimenEc, together

with a description of the appearance of the broken specimen.

5.8.1 If the max. energy is more than 5J, the energy absorbed by

breaking the test specimen should be calculate as the following formula:

Ec=Pd(cos-cos ) Where: Pdthe moment of the hammer (constant)

150

the angle after breaking the specimen by impacting;

The energy lost by the friction and air resistance could be neglected.

5.8.2 If the max. energy is less than 5J, the friction and air resistance

should not be neglected. The energy absorbed by breaking the test

specimen should be calculate as the following formula:

Ec=Pd[(cos-cos ) (cos-cos )( +/+)]

= E- Pd[(cos-cos )( +/+)]


Where:

EcThe energy after correction

E-The display data on the dial

Pd-- the moment of the hammer (constant)

150

--the elevated angle after idle impact

the angle after breaking the specimen by impacting;

Note: The tester is designed according to the above principle.

Moment(Pd) of the hammer:

XJJ5 (0.5J,1.0J,5.0J)

Pd0.5=0.26795Nm Pd1=0.53590Nm Pd2=1.07180Nm

Pd4=2.14359Nm Pd5=2.67949Nm

XJJ-50 (7.5J,15.0J,25.0J,50.0J)

Pd7.5=4.01924Nm Pd15=8.03848Nm

Pd25=13.39746Nm Pd50=26.79492Nm

5.9 CALCULATION

5.9.1 Unnotched specimen

Calculate the Charpy impact strength of unnotched specimens, acu, expressed in kilojoules per square meter, using the following equation:

acu = where:

Ec is the corrected energy, in joules, absorbed by breaking the test

specimen;

h is the thickenss, in millimeters, of the test specimen;

b is the width, in millimeters, of the test specimen.

5.9.2 Notched specimens

Calculate the charpy impact strength of notched specimens, acN,


expressed in kilojoules per square meter, with notches A,B or C, using

the following equation:

acN = where:

Ec is the corrected energy, in joules, absorbed by breaking the test

specimen;

h is the thickenss, in millimeters, of the test specimen;

bN is the width, in millimeters, of the test specimen.


SECTION 6TEST REPORT

The test report shall include the following information:

6.1 A reference standard ISO179 to this test;

6.2 All information necessary for identification of the material tested,

including type, source, manufactures code, grade and history, where

these are known;

6.3 A description of the nature and form of the material;

6.4 The velocity of impact;

6.5 The nominal pendulum energy;

6.6 The method of test specimen preparation;

6.7 The number of specimens tested; 6.8 The standard atmosphere used for conditioning and testing, plus any

special conditioning treatment if required by the standard for the material

or product;

6.9 The types of failure observed;

6.10 The individual test results, presented as follows:

1) Group the results according to the three basic types of failure:

C complete break, including hinge break H

P partial break

N non-break

2) select the most frequent type and record the mean value x of the

impact strength for this type of failure, followed by the letter C or P for the

type of failure.

3) if the most frequent failure type is N, record the letter N only,

4) add (between brackets) the letter C,P or N for the second most

frequent failure type, but only if its frequency is higher than 1/3 (if not

relevant, insert an asterisk);

6.11 the standard deviations of the mean values, if required;


6.12 The date of the test.


SECTION7MAINTENANCE

7.1 When moving the tester, the hammer should be take away.

7.2 The hammer should be antirust after using every time.

7.3 Please do not disassembly and replace any parts of the hammer.

7.4 Store the hammer and other accessories in the accessories box after

testing.


SECTION 8APPEARANCE OF THE TESTER

Address: Chengde Jinjian Testing Instrument Co., Ltd No.14 High-tech Development Zone, Chengde City 067000 Hebei Province, China Tel: 86-314-5909029 http://www.jinjian-test.com.cn Fax: 86-314-2121898 E-mail:[email protected] Beijing Office: Room 204, No.4 Langqinyuan Building, Guang an men, Beijin, China Tel86-10-63369697 Shanghai Office: Shanghai Putuo District , Xincun Road 1388 bystreet 23#, Room101 Tel: 86-21-56353085 Guangzhou Office: Room 705, A Stair, Jin Tang Yuan, Tianhe, Guangzhou, China Tel :86-20-85273127

xjj--50 （60，70，90钳口）

Documents

charpy vice

important safety instructions

groundingtype plug

power cord

grounding type power

charpy vise instllation

wire grounding type

dial mechanism operation