IPC-TM-650 EN 2022 试验方法.pdf - 第388页

1.0 Scope This test method provides a measurement of the spitting characteristics of flux-cored wire and ribbon sol- der. 2.0 Applicable Documents J-STD-006 Requirements and Test Methods for Electronic Grade Solder Alloy…

6.0

Notes

6.1 Safety

Observe

all appropriate precautions on MSDS

for chemicals involved in this test method.

IPC-TM-650

Number

2.4.47

Subject

Flux

Residue Dryness

Date

1/95

Revision

age3of2

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1.0

Scope

This

test method provides a measurement of

the spitting characteristics of flux-cored wire and ribbon sol-

der.

2.0

Applicable Documents

J-STD-006

Requirements

and Test Methods for Electronic

Grade Solder Alloys and Fluxed and Non-fluxed Solid Solders

for Electronic Soldering Applications

3.0

Test Specimen

One

five meter length of the J-STD-

006 flux-cored wire or ribbon solder (may be cut into several

smaller lengths for convenient handling).

4.0

Apparatus

4.1

One

laboratory stand with soldering iron support clamp

and metal support ring or tray with a suitable hole in center.

4.2

One

20 by 20 cm piece of aluminum foil with 11 ± 0.5

mm diameter hole in center.

4.3

One

small metal tray with suitable hole in center, for

catching molten solder running down off of the soldering iron

tip.

4.4 One

soldering iron with a clean chisel point which has

been coated with solder and wiped clean.

5.0

Test Procedure

5.1 Preparation for Test

5.1.1

Using

additional pieces of solder identical to the test

specimen, determine the flux content of the flux cored solder

in accordance with IPC-TM-650, Test Method 2.3.34.1 and

expressed in percentage units (%F).

5.1.2

Set

up test configuration as shown in figure 1. The

soldering iron should be positioned so that its tip extends

approximately 6 mm through the aluminum foil.

5.1.3 Weight

the aluminum foil (P1) and place it on the labo-

ratory stand tray/ring so that the 11 mm hole is centered

around the tip of the soldering iron.

5.1.4

Weight

the solder sample (W1).

5.1.5 Turn on soldering iron and allow the tip temperature to

stabilize.

5.2

Test

5.2.1

Apply

the solder sample to the heated soldering iron

tip approximately at an even rate, 1 cm at a time, keeping the

soldering iron tip temperature steady.

5.3

Evaluation

5.3.1

Weight

the stub(s) of the solder specimen not melted

in the test (W2).

5.3.2

Weight

the aluminum foil containing the spattered flux

(P2).

5.3.3

Calculate

the percent weight of spattered flux as fol-

lows:

Percent by weight of spattered flux =

(P2−P1)

Fx(W

1−W2)

6.0

Notes

6.1 Safety

Observe

all appropriate safety precautions.

The

Institute for Interconnecting and Packaging Electronic Circuits

2215 Sanders Road • Northbrook, IL 60062-6135

IPC-TM-650

TEST

METHODS MANUAL

Number

2.4.48

Subject

Spitting

of Flux-Cored Wire Solder

Date

1/95

Revision

Originating Task Group

Solder Alloy Task Group (5-24c)

Material

in this Test Methods Manual was voluntarily established by Technical Committees of the IPC. This material is advisory only

and its use or adaptation is entirely voluntary. IPC disclaims all liability of any kind as to the use, application, or adaptation of this

material. Users are also wholly responsible for protecting themselves against all claims or liabilities for patent infringement.

Equipment referenced is for the convenience of the user and does not imply endorsement by the IPC.

age1of2

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IPC-I-003166-

Figure

1 Test apparatus for spitting test

▼

Stand

Soldering Iron

Metal tray to

collect solder

Hole 11mm Diameter

45°

Metal tray

Aluminum Foil

Flux Cored Solder Wire

IPC-TM-650

Number

2.4.48

Subject

Spitting

of Flux-Cored Wire Solder

Date

1/95

Revision

age2of2

电子技术应用　　　　　　　ｗｗｗ．ＣｈｉｎａＡＥＴ．ｃｏｍ