BMS HARTIP 2000 Manuale utente

BMS Bulut Makina Sanayi Ve Ticaret Ltd. Şti.

İkitelli Organize Sanayi Bölgesi Dolapdere Sanayi Sitesi

Ada 4 No : 7-9 Başakşehir / İSTANBUL

Tel : 0 212 671 02 24 / 25 Fax : 0 212 671 02 26

web site : www.bulutmak.com e-mail : bms@bulutmak.com

OPERATION MANUAL

KULLANMA KILAVUZU

CONTENT

1.1. History................................................................................................................ 2

1.2. Leeb Hardness Test (definition).......................................................................... 2

1.3. Notation of Leeb’s Hardness .............................................................................. 2

2. Features and Applications .................................................................................... 3

2.1. Introduction ........................................................................................................ 3

2.2. Specifications ..................................................................................................... 3

2.3. Applications........................................................................................................ 3

3. Layout and Key-pad Description .......................................................................... 4

3.1. Layout of HARTIP 2000...................................................................................... 4

3.2. Function of Key .................................................................................................. 5

3.3. Special Features of Impact Devices................................................................... 5

4. Symbols and Illustrations ................................................................................... 5

4.1. Symbols and Illustrations ................................................................................... 5

5. Measurement and Conversion Table.................................................................. 6

6. Preparation before Measuring.............................................................................. 6

6.1. Requirements for the sample ............................................................................. 6

6.2. Samples with Curved Surfaces .......................................................................... 8

7. Operation ............................................................................................................ 8

7.1. Switch on the tester............................................................................................ 8

7.2. Parameter Setup................................................................................................ 9

7.2.1. Probe Setup..................................................................................................... 10

7.2.2. Materials Selection........................................................................................... 10

7.2.3. Hardness Scale (Conversion) .......................................................................... 10

7.2.4. Mean Time ........................................................................................................11

7.2.5. Storage..............................................................................................................11

7.2.6. Printing Setup....................................................................................................11

7.2.7. Impact Direction ................................................................................................11

7.3. Operation ......................................................................................................... 12

7.3.1. Take measurement........................................................................................... 12

7.3.2. Load spring force.............................................................................................. 12

7.3.3. Release............................................................................................................ 12

7.4. Data storing and re-reading.............................................................................. 13

7.5. Statistics........................................................................................................... 13

7.5.1. View statistics value ......................................................................................... 13

7.5.2. Delete the non-realistic value........................................................................... 13

7.6. Print-Out........................................................................................................... 14

7.6.1. Printing stored values....................................................................................... 14

7.6.2. Printing on line ................................................................................................. 14

7.7. Calibration (Compensation).............................................................................. 14

7.7.1. Calibration for probe D..................................................................................... 14

7.7.2. Calibration for probe DL................................................................................... 15

7.8. Restore factory settings and check serial no.................................................... 16

8. Maintenance and Repair .................................................................................... 16

8.1. Maintenance of the Impact Device................................................................... 16

Forewords

1.1. History

The Leeb measuring method was first brought into measurement technology in 1978. It is defined as the quotient of an

impact body’s rebound velocity over its impact velocity, multiplied by 1000. Harder materials produce a higher rebound

velocity than softer materials. For a specific group of material (e.g. steel, aluminum. etc.), Leeb hardness value represents a

direct relationship to its hardness properties. For ordinary metal, conversion curves of hardness HL versus other standard

static hardness (HB, HV, HRC, etc.) are available, enabling you to convert HL into other hardness values.

1.2. Leeb Hardness Test (definition)

An impact body with a spherical test tip made of tungsten carbide is propelled against the sample surface by a spring force

and then rebounds back. At a distance of 1mm from the sample surface, the impact and rebound velocity of the impact

body are measured by the following method: A permanent magnet embedded in the impact body, when passing through

the coil in its coil holder, induces in the coil an electric voltage proportional to the velocities of the magnet. Leeb hardness

is expressed by the following formula:

1000*

HL 

Where: HL is Leeb Hardness

Vris the rebound velocity of the impact body

Viis the impact velocity of the impact body

The voltage characteristic of output signal, when the

impact body passes through the induction coil is illustrated in the following figure:

Voltage characteristic of output signal

A Leeb’s Hardness Tester measures the hardness of sample material in terms of Hardness Leeb (HL), which can be

converted into other Hardness units (Rockwell B and C, Vicker, Brinell and Shore D).

1.3. Notation of Leeb’s Hardness

When measuring the hardness of a sample material using the traditional static hardness testing method, a change of

applied pressure will result in a change in the hardness reading. This will also happen during a Leeb’s Hardness test when

one changes the impact device. In hardness measurement of the same test sample with different impact devices, the Leeb’s

hardness values obtained will vary.

For example: 720HLD≠720HLC

Because different converting curves are obtained from different impact devices, when converting hardness HL into

another hardness values, the notation for the converted hardness value should include the impact device used.

For example:

Hardness HV converted from hardness HL using impact device D+15 should be written as 22, 8 HV LD+15.

Where: 22=Hardness value HL

8=Hardness value HV

L=Leeb’s Method

D+15=Impact device

Hardness HRC converted from hardness L using impact device D should be written as 35, 9 HRCLD.

Where: 35=Hardness value HL

9=Hardness value HRC

L=Leeb’s Method

D=Impact device

2. Features and Applications

2.1. Introduction

HARTIP 2000 is an innovative portable Leeb hardness tester with our new patent technology which makes HARTIP 2000 a

universal impact direction hardness tester. It is no need to set up impact direction when taking measurement by any angle.

Therefore, HARTIP 2000 offers a linear accuracy comparing to the angle compensating method. HARTIP 2000 is also a cost

saving hardness tester and has many other features.

2.2. Specifications

Principle Leeb hardness measurement

Accuracy ±0.3% @ HL=800

Repeatability ±2HL

Display Digital LCD with backlight

Impact direction Universal angle type

Hardness scale HL/HRC/HRB/HB/HV/HS/σb

Measuring range HL170-960 / HRC17-70 / HRB13-109 / HB20-655 /

HV80-940 / HS32-99.5 / σb(rm)255-2639N/mm2

Impact device D(U) (External) /DC, DL, D+15, G, C(External, optional)

Materials 10 common metal materials

Memory 300 data can be stored and re-readable

Statistics Calculated automatically

Recalibration Allowed by user

Indicator Low battery

Communication interface RS232 to micro-printer, Bluetooth (optional) to Bluetooth micro-printer

Auto power off Auto

Power supply 1.5V AA alkaline battery x 2

Working environment -10ºC ~+45ºC

Dimension (mm) 124x67x30

Net weight (g) 240

Standards Conforming to ASTM A956, DIN50156, GB/T 17394-1998

2.3. Applications

Hardness tests on installed machines or steel structures: e.g. on heavy and large work-piece or on permanently installed

system parts.

Rapid testing of multiple measuring areas for examination of hardness variations over larger regions.

Measuring hardness for produced parts at production line.

Identifying metallic material stored in a warehouse.

Ineffectiveness analysis of permanent parts, pressure -vessel, turbo generator.

3. Layout and Key-pad Description

3.1. Layout of HARTIP 2000

PROBE

3.2. Function of Key

Read the memory

Power On

Power Off

Increase the value

Turn the page forth

Change parameter

Decrease the value

Turn the page back

Delete the current reading

Delete the stored values

Press for 3 seconds to

activate/deactivate direction

indicator

Confirm the setup

View the statistics values

3.3. Special Features of Impact Devices

Type

Brief Description

Universal standard unit for majority of hardness testing assignments.

Extremely short impact device, other specs identical with type D.

- highly confined spaces

- holes and cylinders

- internal measurements on assembled machines

D+15

Slim front section

Application:

- grooves and recessed surfaces.

Extremely slim front section

Application:

- extremely confined spaces

- base of grooves

Reduced impact energy ( compared with type D).

Application:

- surface hardened components, coatings

- minimum layer thickness: 0.2mm.

- thin walled or impact sensitive components (small measuring indentation).

Increased impact energy(approx. 9 times that of type D)

Application:

- Brinell hardness range only

- heavy cast and forged parts with lower demands on surface finish.

4. Symbols and Illustrations

4.1. Symbols and Illustrations

Symbol

Meaning

LD +15

LDL

Leeb hardness value obtained with impact device D

Leeb hardness value obtained with impact device G

Leeb hardness value obtained with impact device C

Leeb hardness value obtained with impact device D+15

Leeb hardness value obtained with impact device DL

HLD

HRB

HRC

σb (N/mm2)

Leeb hardness value used with impact device D

Brinell hardness value

Rockwell B hardness value

Rockwell C hardness value

Shore hardness value

Vicker hardness value

Strength value

5. Measurement and Conversion Table

Range for measurement and conversion:

IMPACT DEVICE D/DC

HLD: 170-960

MATERIALS

HRC

HRB

σb (N/mm2)

Steel & cast steel

20.0-67.9

59.6-99.5

80-647

80-940

32.5-99.5

255-1710

Cold work tool steel

20.5-67.1

80-898

1170-2639

Stainless steel & High-temp.

resistant steel

17-62.4

46.5-109

85-655

85-802

740-1725

Cast iron with lamellar

graphite (GG)

21-59

24-100

93-334

90-698

Cast iron with nodular

graphite (GGG)

21-60

24-100

131-387

96-724

Cast aluminum alloys

23-85

20-159

22-193

Copper-zinc alloys (Brass)

13-95.3

40-173

Copper-aluminum /

Copper-tin alloys (Bronze)

14-100

60-290

Wrought copper alloys

14-100

45-315

Forging steel

142-651

IMPACT DEVICE DL

LDL: 560-950

MATERIALS

HRC

HRB

σb (N/mm2)

STEEL

20.6-68.2

37.0-99.9

81-646

80-950

30.6-96.8

IMPACT DEVICE D+15

LD+15: 300-900

MATERIALS

HRC

HRB

σb (N/mm2)

STEEL

19.3-67.9

80-638

80-937

33.3-99.3

CW. ST.

19.8-68.2

80-935

IMPACT DEVICE G L G: 300-750

MATERIALS

HRC

HRB

σb (N/mm2)

STEEL

47.7-99.9

90-646

GC.IRON

92-326

NC.IRON

127-364

IMPACT DEVICE C

L C: 350-950

MATERIALS

HRC

HRB

σb (N/mm2)

STEEL

20.0-70

80-683

80-996

31.9-102.3

CW. ST.

20.7-68.2

100-941

6. Preparation before Measuring

6.1. Requirements for the sample

The surface temperature of sample should be less than 120 C.

The samples must feature a metallic smooth, ground surface, in order to eliminate erroneous measurements brought

about by coarse grinding or lathe scoring. Roughness of the finished surface should not exceed values shown in following

table:

Types of impact devices

Max surface roughness of sample Ra

D/DC/D+15/DL

2μm

7μm

0.4μm

Requirements for the weight of the sample

For samples weighing over 5 kg and of compact shape, no support is needed.

Samples weighing between 2-5 kg, and also for heavier samples with protruding parts or thin walls, should be placed on a

solid support in such a manner that they do not bend or move by the impact force.

Samples weighing less than 2 kg should be firmly coupled with a stable support weighing over 5 kg.

For coupling purposes,

The coupling surface between the sample and base plate should be flat, plane parallel and ground.

A thin proper layer of coupling paste is to be applied to the contact surface of the sample.

The sample should be firmly pressed against the surface of the base plate by moving it with a circular motion.

The direction of impact should be perpendicular to the coupling surface.

For the coupling operation, the following prerequisites must be fulfilled:

The contact surface of the sample and the surface of the base plate must be flat, plane parallel and ground.

The direction of the test impact must be perpendicular to the coupled surface.

Minimum thickness of the sample for coupling under various impact devices are shown in following table:

Types of impact devices

Minimum thickness

D/DC/D+15/DL

3mm

10mm

1mm

Proper Coupling:

Proper coupling requires a little experience. Insufficiently coupled samples produce large variations of individual

measurements, L-values which are too low and the operation is characterized by a rattling noise upon impact of the test

tip.

Example for coupling a test piece with a base plate:

Requirement for the surface hardened layer of the sample

Surface-hardened steels, especially case-hardened steels, produce L-values which are too low when case-hardening depth

is small because of their soft core .When measuring with impact devices D, D+15 or DL, depth of the hardened layer should

be no less than 0.8 mm. When measuring with impact device C, the depth of the hardened layer should be no less than 0.2

mm.

Types of impact devices

Min. layer thickness for surface hardening

D/DC/D+15/DL

0.8mm

0.2mm

Application of the coupling

paste

(As thin as possible).

Mutual rubbing of both parts while firmly

press the sample against the base plate.

A particular advanced of coupling is the possibility of

obtaining a very uniform, rigid connection between the

sample and the support, totally eliminating stresses at the

sample surface. The resulting variation in measured

values is very low.

Surface of the test sample should not be magnetic.

For test sample of curving surface with radius of curvature R less than 30mm, a small support ring should be used.

Supporting the Samples during Testing

Types of impact

devices

Classification of samples

Heavy-weigt

medium-weight

light-weight

D/DC/D+15/DL

>5kg

2 - 5kg

0.05 –2kg

>15 kg

5 - 15kg

0.5 –5kg

>1.5kg

0.5 - 1.5kg

0.02 - 0.5kg

When measuring hardness with HARTIP 2000, the following has to be noticed: Despite the low mass of the impact body

and low impact energy, a relatively large impact force within short duration is generated when the impact body hits the

measuring surface.

Types of impact devices

D/DC/D+15/DL

Max. impact force

900N

2500N

500N

No particular precautions are necessary for heavy-weight samples with compact shape.

Smaller and lighter samples or workpieces may yield or flex under this force, producing too-low L-values with excessively

large variation. Even with big or heavy workpieces, it is possible for thin-wall regions or thinner protruding parts to yield

upon impact. Depending on the frequency of the resilient yielding action, the measured L-value may be abnormally low or

high. Under many situation, potential problems can be checked in the following manner:

a) Medium-weight samples and also heavier samples with protruding parts or thin walls should be placed on a solid

support in such a manner that they do not move or flex during the test impact.

b) Light-weight samples should be rigidly “coupled” with a non-yielding support such as a heavy base plate. Clamping in a

vice is of no value, since the samples become exposed to stress and because complete rigidity is never attained. As a rule,

the measured L-values would be too small and show excessive variations.

6.2. Samples with Curved Surfaces

Impact testers only work properly, if the impact body has a certain position in the guide tube at the moment of impacting

the test surface. In the normal position, automatically present when testing flat and convex-cylindrical samples (such as

round samples), the spherical test tip is located exactly at the end of the guide tube.

However, when testing spherically or cylindrically shaped concave surfaces, the impact body remains further within the

guide tube or protrudes further therefore. Thus, with such types of curved surfaces, it is to be observed that radii of

curvature do not drop below the values indicated in the following Fig.

Curved surfaces should always be tested with the small support ring.

Impact device types D, D+15 and C Rmin =30mm

Impact device type G Rmin =50mm

For impact devices D, D+15 and C, special support rings are available to accommodate smaller radii on convex or

concave surface.

7. Operation

7.1. Switch on the tester

Press the key to switch on the tester and press the key again to switch off the tester. When the

tester is switched on, the tester will enter into measuring mode.

7.2. Parameter Setup

Operation Diagram

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