|
|
|
Visual
Inspection Of Welding |
Introduction
To The Workshop
|
|
|
Rationale Inspection is
traditionally considered a post–processing activity. A machine component may
be turned to finished form and size–then inspected for conformance to the
applicable drawing or specification.
|
|
|
A garment is inspected after sewing and all
the buttons and other features are in place. In these and similar instances,
visual inspection is carried out after the production activities have
been completed. In the case of weldments, experience has shown that
post–processing inspection, even when supplemented with nondestructive
examination (NDE), gives no guarantee of suitability for intended service.
|
|
|
However, consistent results over a considerable period of time have demonstrated
the effectiveness of a pre–planned sequence of visual inspections. If carried
out at specific stages of weldment production, such programs give a high degree
of assurance of meeting quality expectations–frequently without recourse to
NDE.
|
|
|
With welding, the factors influencing quality may manifest themselves at
any stage of the production operation. In many instances, quality is compromised
even before welding commences.
|
|
|
In most such circumstances, suitably timed visual
inspection would have revealed the shortcoming at a stage when corrective action
would be simple to implement and inexpensive to carry out. Weld and weldment
quality are determined by :
|
|
1.
Weldment and joint design
|
|
2.
Materials of construction
|
|
3.
Procedure of welding
|
|
4.
Manner of weld application
|
|
5.
Inspection program
|
|
Visual welding inspection provides the basis for the effective
control of
these determinants.
|
|
Back
to Top Page
|
Workshop
Aims : The aims of this workshop are to
|
|
|
Provide
a basic understanding of the circumstances under which weld and weldment
quality, or both, may or will be compromised.
|
|
|
Offer
a 24–point program of weld inspection that gives a high degree of
assurance of meeting weld quality requirements for most fabricated
products.
|
|
|
Show how to develop and implement specific quality plans to
meet
all normal requirements for weld and weldment quality.
|
|
|
Demonstrate and practice
the techniques of visual inspection
required to carry out effective weld quality control.
|
|
|
Quality The term quality is widely used and
applied. However, many times, the general concept of quality is
misunderstood. Quality is conformance to the applicable specification.
|
|
|
The
required level of quality for a product or service is typically determined by
the designer, based on suitability for service over the intended life span. All
product variables must be specified in a manner that is capable of being
measured.
|
|
|
Dimensions
are readily verified. Attributes such as surface finish, if significant, must be
specified in terms allowing for precise determination or measurement.
|
|
|
In
carrying out an inspection, the inspector's task is to compare the actual with
the required or specified product dimensions. Appearance alone is rarely the
determinant of product quality.
|
|
For
Course Contents Click Here. |
|
