模具拔模斜度符号及对测量的影响
爱情谜语-幼儿园家长会发言稿
DELPHI ENGINEERING STANDARDDESIGN
SYMBOLS
B1
1 GENERAL
Symbols are used on drawings as an abridged
means of expressing commonly
used words or
processes. The symbols commonly used on drawings
other than
Geometric Dimensioning and
Tolerancing Symbols are shown in this section.
2 DRAFT SYMBOLS
Symbols to
indicate direction of draft may be used in place
of pictorial illustrations
on drawings of cast
or molded parts. Symbols are particularly
advantageous on
drawings for intricate parts.
The use of the following symbols and guides for
their
use will minimize misinterpretation.
2.1 All draft symbols are variations of
the letter
= Draft included. See Figures
2.02 and 2.03.
= Plus draft, means dimension
to which symbol is applied may increase due
to
draft. See Figures 2.04 and 2.05.
= Minus
draft, means dimension to which symbol is applied
may be reduced
due to draft. See Figures 2.06
and 2.07. The above interpretation
should not
be confused with the interpretation that the
symbol is related to plus or
minus material.
2.2 Symbols should be defined on the
drawing or by a note on the drawing
referring
to this standard.
2.3 Features subject
to draft should be covered by the applicable
symbol or by a
general specification on the
drawing.
2.4 Amount or angle of draft is
specified in note form or by dimensions
independent of symbol usage. When only the
draft-included symbol is used, the
specification of draft angle is not required.
2.5 When direction of draft on thru holes
is to be controlled, it may be indicated
either by applying a draft symbol, or by
specification of the hole diameter at each
end.
2.6 Figures 2.01 through 2.07
illustrate the size, use and interpretation of
draft
symbols.
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DELPHI ENGINEERING
STANDARDDESIGN
SYMBOLS
B1
FIGURE 2.01 - SIZE OF SYMBOL
MAY 2003
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document is uncontrolled.
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DELPHI ENGINEERING
STANDARDDESIGN
SYMBOLS
B1
FIGURE 2.02 - DRAFT INCLUDED-HOLES
MAY 2003
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is uncontrolled.
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DELPHI ENGINEERING
STANDARDDESIGN
SYMBOLS
B1
FIGURE 2.03 - DRAFT INCLUDED-EXTERNALAND
INTERNAL FEATURES
MAY
2003
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uncontrolled.
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DELPHI ENGINEERING STANDARDDESIGN
SYMBOLS
B1
FIGURE 2.04
- PLUS DRAFT-HOLES
FIGURE
2.05 - PLUS DRAFT-EXTERNAL AND INTERNAL FEATURES
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DELPHI ENGINEERING
STANDARDDESIGN
SYMBOLS
B1
FIGURE 2.06 - MINUS DRAFT-HOLES
FIGURE 2.07 - MINUS DRAFT-
EXTERNAL AND INTERNAL FEATURES
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DELPHI ENGINEERING
STANDARDDESIGN
SYMBOLS
B1
3. KEY PRODUCT CHARACTERISTICS (KPC) SYMBOLS
A method to identify, document, communicate,
and control the dimensions
andor
specifications on a drawing (or other primary
engineering document)
for which reasonably
anticipated variation could significantly affect
the
product's safety or compliance with
governmental standards or regulations, or
is
likely to significantly affect customer
satisfaction with a product (see KCDS
reference manual GM-1805 QN).
3.1
When it has been determined that a KPC symbol
(Figure 3.01) is required for
SafetyCompliance
(SC) andor for FitFunction (FF), a numbered symbol
is
to be added to the specification, dimension
or GD&T feature control frame
shown on the
drawing using the next available number. Record
your action in
the revision block and in the
KPC block. When both symbols are required for
usage, the SC symbol is to be used.
MAY 2003
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document is uncontrolled.
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DELPHI ENGINEERING
STANDARDDESIGN
SYMBOLS
B1
FIGURE 3.01 - SYMBOLS
3.2 TRACKING OF
KPC SYMBOLS ON A DRAWING.
A KPC block is
the practice normally required to precisely
communicate pertinent
KPC description and
rationale necessary to meet vehicle, subsystem,
and
component requirements. The KPC block
should be added to the drawing (or
other
primary engineering document).
3.2.1 The
KPC block should state the number and type,
description, the
rationale that was used to
select the KPC, the number of check points (when
applicable), and the drawing zone(s). The KPC
block will also state the number
of KPC
symbols currently on the drawing and the last
number used. Example:
Last number used was 7,
but 2 usages were cancelled leaving 5 symbols
currently active on the drawing.
3.2.2 Do not re-use a KPC number which has
been cancelled. If there are no
KPC's
identified, enter zero for TOTAL ON DRAWING and
LAST NUMBER
3.3 KPC CHECKPOINTS.
A method of identifying and communicating the
location andor target area for
which product
measurements are taken to verify or validate the
KPC's of a
product.
3.3.1 The
KPC Checkpoint symbol will be identical in size
and shape to either
the SafetyCompliance or
the FitFunction KPC symbol with the letter
designated inside rather than a number. The
points will then be numbered to the
right of
the symbol such as 1-1 . . . 1-5, 2-1 . . . 2-3
etc., where digits
on the left of the dash
line denote the associated KPC feature number and
the
digits on the right of the dash line
denote the point number being identified
(Figure 3.02).
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is uncontrolled.
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DELPHI ENGINEERING
STANDARDDESIGN
SYMBOLS
B1
FIGURE 3.02 - KPC CHECKPOINT SYMBOL
4. NOTE FLAG
5.
MANUFACTURING DATA
Equilateral
triangle used to relate a note to a particular
dimension or
other drawing element. The number
of the note appears in the
triangle.
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document is uncontrolled.
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Equilateral triangle denotes
dimensions used in automated
assembly feeding
process.
DELPHI ENGINEERING
STANDARDDESIGN
SYMBOLS
B1
6. MANUFACTURING DATA
Equilateral triangle denotes reference data
for manufacturing
purposes; non-mandatory
manufacturing data.
7. CENTER LINE
8. PARTING LINE
9. EJECTOR PAD LOCATION
Size as required. Should be located with
coordinate dimensions.
10.
REVISION RECORD
DATE
05MY03
REVISION
00 Initial Publication
DESCRIPTION
GENERAL INFORMATION
This
standard is controlled by the Delphi Design
Standards Team (DDST).
MAY 2003
When
printed, this document is uncontrolled.
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