Click here to make tpub.com your Home Page

Page Title: Welding
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home


   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 

TM 10-3930-633-34
must be made in 2 or more passes. Bead from first
available from welding suppliers in 50 in-
pass is to be chipped and work must not be
crements from 100 F through 2200 F.
allowed to cool between passes.
c. All cracks in the damaged area, or in areas
listed in paragraph 2-14 above, must be groove-
2-21. Inspection
ground the entire length of the crack, and the
a. Remove slag and spatter, and check for
entire crack removed. Any weld repair must be
conformity to paragraph 2-20 (above). Finished
made on sound material.
and cooled joints should be thoroughly inspected
d. No notches, gouges, or craters should be left
for chill cracks. If any, prepare as in paragraph 2-
in the area of weld repair, but must be weld-filled
19 (above) and reweld.
and ground to the original contour before repair
b. Joint inspection is recommended by either
welding. Preparation for weld assumes smooth
of the following methods:
surfaces and contours easily accessible to the weld
(1) Dye penetrant, wet or dry process.
arc.
( 2 ) Magnetic particle inspection. Man-
e. Finish grind marks after welding (if any) on
ufacturer's instructions included with the testing
any surface should not exceed 63 microinches,
gear should be followed as applied to the size,
and should run in the direction of the load. When
shape, or other nature of the work being tested.
required, a disc grinder with #80 grit abrasive is
In general, however, the conditions shown below
recommended.
will serve in most cases, whether the process
2-20. Welding
employs direct or rectified current.
a. Welding should be performed by ex-
(a) Distance betweeen prods shall not be
perienced/qualified  welders.
less than 2 inches.
b. Voltage/amperage/speed settings should be
(b) Ratio for prod spacing/amper-
balanced to produce a well-formed bead, and to
age/section thickness:
assure proper penetration.
c. For subject component welding, the
following ranges apply for E-7018, E-8018, E-
9018 and E-10018 electrodes: Manufacturers
recommendation for arc length and amperage is to
(c) For circular magnetization using the
be followed. These ranges must be balanced per b
direct method, care must be taken to provide
above.
sufficient contact area to pass the required
Size
Weld Inches Min
Amperage
amperage without overheating or burning the
(Average)
work. 100 to 400 amperes per inch of diameter
3 /32
70-120
1/8
6-8
100-150
should be used.
5 /32
120-200
8-10
c. Continuous or residual inspection may be
200-275
10-12
3/16
employed.
12-14
275-350
7/32
d. Repaired weldment should be checked for
14-16
300-400
1/4
straightness, flatness, and overall conformance to
d. On the rectifier type welders (most common
original dimensions prior to returning to service.
today) the voltage is variable and is automatically
2-22. Indemnity
keyed to the amperage. The voltage range is
It is understood by all parties that the welding
therefore omitted from the listing.
repair of any damaged fork, carriage, or upright
e. Average welding speed (inches per minute)
component on the machines of subject Govern-
is based on " fillets and on flat and horizontal
ment contract, and the compliance with the in-
joints. It will be obvious that the selection of
structions and conditions contained herein, is to
electrode sizes under 5/32" is unwise for this
be the responsibility of the agency authorizing
application.
that repair, and not the manufacturer.
f. All joints calling for 3/8" (or more) fillet
Section IV. REMOVAL AND INSTALLATION OF MAJOR COMPONENTS AND ACCESSORIES
2-23. General
of those major components which are replaceable
only at the Direct Support or higher level of
The instructions in the following paragraphs
maintenance. Refer to TM 10-3930-633-12 for
are provided to aid in the removal and installation

Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business