EG-1002-1955A - LBNL Engineering Part Marking Methods.pdf

Lawrence Berkeley National Laboratory Engineering Standard

Cat Code

EG0001

LBNL Document #

EG-1002-1955

Rev

A Page

Author(s)

S. Burns

Collaborating Institution

Reviewed By srburns

Reviewed Date

Jan 24 2022 1:38:28 PM PST Approved / Concurred By srburns DCC Release Date

Jan 24 2022 1:38:28 PM PST Title

ENGINEERING DISCIPLINE

LBNL ENGINEERING PART MARKING METHODS

Revision Detail on Change Modified By Date Modified A Document Creation and First Release SR Burns 12/08/2020 B

Lawrence Berkeley National Laboratory.

LBNL ENGINEERING LBNL

ENGINEERING PART MARKING

METHODS

This Engineering Drawing Standard establishes the standards to be adhered to by the Engineering and Drafting personnel in the preparation and completion of Engineering Drawings at or for Lawrence Berkeley National Labroratory.

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LBNL

SPECIFICATION LBNL

ENGINEERINGPART

MARKING

METHODS

LBNL Document #

EG-1002-1955

Rev

A Page

Table of Contents Table of Contents

1. INTRODUCTION

2. SCOPE

3. PERMANENT MARKING

Permanent Marking Methods

4. PART MARKING APPLICATION

General

Marking Fonts for Characters

5. PART MARKING NOTE EXAMPLE

6. REFERENCE DOCUMENTS - LBNL

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ENGINEERINGPART

MARKING

METHODS

LBNL Document #

EG-1002-1955

Rev

A

1. INTRODUCTION

This Engineering document describes methods for Part Marking of objects utilized by LBNL external or internal, projects, experiments, research, scientific equipment, or other as described by either/or 3-D models or drawings. This document works in concert with EG-1000-0824 and EG-1000-0923. The General Notes associated with either/or 3-D model and drawings will reference this document.

2. SCOPE

This Engineering document covers all Engineering Drawing Standards and gives recommendations for the principles of part marking to be applied to objects described by Engineering Drawings created at or for Lawrence Berkeley National Laboratory.

This Part Marking Standard applies to any part regardless of material or size, as long as this document is referenced within the notes for the object. The note for the object will specify the size and location for the part marking. This document is meant to describe how to mark the part, whether the marking is engraved, stamped, inked, scribed, labeled, or other method. This document is not meant to specify where and what specific size, but does provide limits of size.

Unless specified otherwise the guidelines set forth in this document are based on the International Organization for Standardization (ISO) and the American Society of Mechanical Engineering (ASME) Standards so they can be interpreted and understood universally. See Definitions for complete list of Standards.

3. PERMANENT MARKING

Permanent Marking uses a process which will ensure identification during the normal service life of the item. Methods of permanent marking are;

Permanent Marking Methods

Shall not affect the function or serviceability of the item. Depth of all markings to be specified within the note as appropriate for the marking method.

Integral – Characters produced by forcible stamping, forging, or molding into the item

Metal Stamp – Characters are produced by forcible displacement of material.

Hammer – Characters are produced individually or in groups by impact force applied mechanically or by hand.

Press – Characters are produced individually or in groups with a controlled force applied without impact.

Roll – Characters are produced by a rotating motion of either the item or the tool, or both, when in contact with each other under a controlled force.

Vibro Peen – Characters are produced by a hand guided or mechanically rapidly vibrating tool having a pointed tip, or multiple tips, making indentations on the item to produce characters.

Dot-Peening – Characters are produced by a mechanically guided rapidly vibrating tool having a pointed tip. Multiple tipped tools may produce one or more characters simultaneously.

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ENGINEERINGPART

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Engrave – Characters are produced by a rotating cutter or grinder.

Manual – Characters are produced by a hand guided rotating cutter or grinder.

Electric Arc Scribe – Characters are produced by the action of an electric arc between the surface and an electrode which acts as the scriber.

Manual Scribe – Characters are produced by a manually held cutting or scratching action.

Acid Etch – Characters are produced by the use of a strong acid appropriate for the material being marked.

Ink, Dye or Paint – Characters are produced by applying an ink, dye or paint be any means which does not injure the surface. When the final marking is applied it is recommended that the marking be coated with a clear protective coating suitable for the marking method.

Laser – Characters are produced by displacing material with a laser beam appropriate for the material being marked.

Temporary Marking – Characters are produced using a method which is appropriate for the object.

Use of tags with handwritten characters and suitable attachment to the object. Use of placing the object(s) within a suitable bag and marking the bag with indelible ink.

Labels – Characters are produced onto a label material with an adhesive backing suitable for the object and affixed to the object.

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ENGINEERINGPART

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LBNL Document #

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4. PART MARKING APPLICATION

General The actual application of the method is to be described in the note for the object. In this note there needs to be information about what size the characters should be and what is the depth of the marking method. The size of the characters should be commensurate with the object size. The placement of the marking should be indicated either within the drawing or other suitable method. If there is no specific direction provided to indicate where to mark, then the marking should be placed in such a location that can be seen easily and readily. The part marking should not interfere with the functioning of the object. The location of the marking should not be on any surface that there is a designed, intended motion or contact between other objects.

Marking Fonts for Characters The font to be used for marking should be of a block type characteristic. The fonts which are in the style of cursive are not recommended.

The specific font to be used is dependent upon the method to be used and tool used for marking. It is recommended to check with the fabricator/vendor that will be performing the marking to determine the font.

Recommended block style fonts to use;

Font 1: Arial i.e. AL-1234-5678 is a preferred standard block format.

Font 2: Arial Black i.e. AL-1234-5678 is a preferred standard block format.

Font 3: Century Gothic i.e. AL-1234-5678 is a preferred standard block format.

Font 4: Calibri Light i.e. AL-1234-5678 is a preferred standard block format.

Font 5: Corbel Light i.e. AL-1234-5678 is a preferred standard block format.

When labels are used as a marking method and use1-D and 2-D digital codes (i.e. Barcode or QR code) the fonts used along with the codes should still consider the above list of preferred fonts, but they are not limited to using these fonts.

Placing the marking location in the model When desired the location of the place for the part marking can be shown as a 2-D or 3-D feature in the model. There are three best practice methods for accomplishing this, and they are;

NOTE: The part marking location and feature does not have to be shown in the model, unless the fabrication technique to be used is by Model Based Manufacturing, in which case it must be Method 3 as described below.

4.3.1.On a surface of the model place a sketch feature. The sketch feature will be a box, a rectangle, described by the desired height and length of the part marking. The rectangle box feature will conform to section 3.1.4 of AS478, including the hash marking (see Figure 4.1). The location of the feature can be completely described with distance and tolerance from any desired feature in the model. The location of the rectangular box can also be shown in an approximate position, where a more exact location is not as critical or needed.

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4.3.2. On a surface of the model place a sketch feature of the type text. The sketch feature will be a text box, a rectangle, and will include the exact characters desired for the part marking (See Figure 4-2). The rectangle box feature will conform to section 3.1.2 of AS478, including the character marking. The location of the feature can be completely described with distance and tolerance from any desired feature in the model. The location of the rectangular box can also be shown in an approximate position, where a more exact location is not as critical or needed.

Figure 4-2

4.3.3. On a surface of the model place a 3-D feature extrude into the surface of the model. The 3-D feature will be the exact character example of what is desired with the height and length of the part marking. The location of the feature can be completely described with distance and tolerance from any desired feature in the model. The location of the feature can also be shown in an approximate position, where a more exact location is not as critical or needed.

Part Marking shown on the Drawing When ever there is a drawing created to describe a part, then the method for showing the part marking (if part marking is needed) can be accomplished using three best practice methods, and they are;

4.4.1. In a view of the drawing either place or show the sketch feature. The sketch feature will be a box, a rectangle, described by the desired height and length of the part marking. The rectangle box feature will conform to section 3.1.4 of AS478, including the hash marking (see Figure 4.1). The location of the feature can be completely described with distance and tolerance from any desired feature in the drawing view. The location of the rectangular box can also be shown in an approximate position, where a more exact location is not as critical or needed. The box and its meaning are described by using a flag note pointed to(attached) the rectangular box.

See Section 5 for the contents of the note.

4.4.2. In a view of the drawing either place or show the sketch feature of the type text. The sketch feature will be a text box, a rectangle, and will include the exact characters desired for the part marking (See Figure 4-2). The rectangle box feature will conform to section 3.1.2 of AS478, including the character marking. The location of the feature can be completely described with distance and tolerance from any desired feature in the model. The location of the rectangular box can also be shown in an approximate position, where a more exact location is not as critical or needed. The box and its meaning are described by using a flag note pointed to(attached) the rectangular box. See Section 5 for the contents of the note.

4.4.3 In a view of the drawing a 3-D feature can be described and clearly identified. The 3-D feature will be the exact character example of what is desired with the height and length of the part marking. The location of the feature can be completely described with distance and tolerance from any desired feature in the model. The location of the feature can also be shown in an approximate position, where a more exact location is not as critical or needed. The 3-Dfeature and its meaning are described by using a flag note pointed to(attached) the feature in the view. See Section 5 for the contents of the note.

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ENGINEERINGPART

MARKING

METHODS

LBNL Document #

EG-1002-1955

Rev

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5. PART MARKING NOTE EXAMPLE (within the model)

The note to use for the marking of the part needs to specify what method to use for making the mark, the depth of the marking, the characters to mark (specific number which can include Serial Number and Revision), the font of the characters and any other pertinent information. There are standard notes and the appropriate note format should be chosen from the Library and then the specific variables need to be applied in the note.

NOTE: The General Notes within the Model Annotations is where the Part Marking Note is contained.

105. PERMANENTLY MARK PART PER EG-1002-1955 AND SAE AS478 <SELECT A

MARKING METHOD OR CLASS LETTER FROM SAE AS478> WITH DRAWING

NUMBER, REVISION LETTER, AND PART SERIAL NUMBER IF APPLICABLE,

APPROXIMATELY WHERE SHOWN IN 3 [.125] HIGH CHARACTERS.

106. BAG AND TAG PART WITH DRAWING NUMBER, REVISION LETTER,

MANUFACTURER CAGE CODE, AND PART SERIAL NUMBER IF APPLICABLE

PER EG-1002-1955 AND PER SAE AS478-35D.

For instance, if you wish to have your part marked by Laser Etching with an intermediate depth you could use the Method Number Tier System and the note would read like this;

(You would use 15B2)

105. PERMANENTLY MARK PART PER EG-1002-1955 AND SAE AS478 15B2 WITH

DRAWING NUMBER, REVISION LETTER, AND PART SERIAL NUMBER IF

APPLICABLE, APPROXIMATELY WHERE SHOWN IN 3 [.125] HIGH

CHARACTERS.

For instance, if you wish to have your part marked by controlled engraving with a deep depth you could use the Method Number Tier System and the note would read like this;

(You would use 3B2)

105. PERMANENTLY MARK PART PER EG-1002-1955 AND SAE AS478 3B2 WITH

For instance, if you wish to have your part marked by Metal Stamp Press with a deep depth you could use the Method Number Tier System and the note would read like this;

(You would choose 2B2)

105. PERMANENTLY MARK PART PER EG-1002-1955 AND SAE AS478 2B2 WITH

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For instance, if you do not have a specific method desired and wish to leave the fabricator to choose a best method you would select from SAE AS478 the Class Letters to select a family of marking types. Class G would then say these tiered methods could be used; 2C1, 2F2, 3B1, 5B1, 7A2, 7C2, 8B, OR 8C.

105. PERMANENTLY MARK PART PER EG-1002-1955 AND SAE AS478 CLASS G

WITH DRAWING NUMBER, REVISION LETTER, AND PART SERIAL NUMBER IF

6. REFERENCE DOCUMENTS

LBNL EPG CAD Homepage SAE AS478R – Identification Marking Methods AA-1002-2758 SAE AS478R Identification Marking Methods ci al ly R el ea se d to th e

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