basics of drawing for engineers

7/28/2019 Basics of Drawing for Engineers

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BASICS OF DRAWING FOR

Kirloskar Pneumatic Co. Ltd

ENGINEERS- PART 2

Kirloskar Pneumatic Co. Ltd


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Guide to types of ISO limits & fits


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General Tolerancing


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Limits & Fits for Shafts & HolesBasic Size & Shaft/ Hole Tolerancing System


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Basic Size & Shaft/ Hole Tolerancing System


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Fits


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Fits


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Limits & Fits Determining Working Limits


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Surface Finish


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ENGINEERING CHANGE NOTICE


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Changes made in engineering documents, viz Drawings SBM BOM & STANDARDS,released for production/development, are communicated to all concerned, through adocument called as Engineering change notice. Kpcl stand. Gives guidelines for procedureto be followed. ( the subject procedure is not applicable to drawings sent to customer forapproval.)

Enclosed is a format of the ECN .

The ECN format, after filling the information, bears a specific number. & date. Configurationof the number can be decided by respective design offices This is recorded in a separatereg s er w a ona n orma on as, - pro uc re erence. r e recor o e c ange,

reason for change, & signature of authority.

ECN number & brief record of change is also written on the drawing. Every change ondrawing is indicated by a symbolic letter, A to H. This symbol is also written near areawhere the change is carried out. In addition to that a circle is marked around the symbol, toknow the change at a glance

Guidelines are also given for entering the data,- reason, effect on stock, , action by otherdepts. Effect on processes.

Codes R1 TO R7 are given for various reasons of ECN e g drawing update drawing


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Codes R1 TO R7 are given for various reasons of ECN, e.g. drawing. update, drawing.error, improvement etc.

Codes S1 TO S7 are provided for actions on stock ,e.g.-use as it is , rework, scrap, etc.Accordingly instructions are required to be given for Stock at various positions viz.inprocess , in assembly ,with dealers / branches etc.

Effect on manufacturing departments, -m shop, assembly, materials, imports , stores etc. andeffect on manufacturing process- tooling , pattern, heat treatment. material, machiningmanualInformation is also given for effect on interchangeability & requirement of service bulletin.

Different depts. To whom drg./ only ECN copy is to be circulated , are listed in a column .

These are to be marked accordingly.

Engineering changes in drawings. submitted for customers approval. -Differentdrawings. eg. GA drg, P I Diagram Electrical drawing. are submitted to customer / consultant,for approval as per contract.

As per comments / suggestions drawing is changed. The changes are recorded on drg, &are identified by a REVISION NUMBER 1, 2, 3, ETC. written in a triangle. After final approvalof drawing changes are incorporated on tracings & drg copies are released for production,through Release sheet Approved drawing prints are stored with R&D / MKTG. DEPT.

Present Format Proposed Format


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DRAWING RELEASE

Before drg is released for manufacturing or customer as authentic document which may


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Before drg is released for manufacturing or customer as authentic document which maybear commercial as well as legal aspect, it should be signed by an authorized person. OnDrg. sheet Three blocks are provided for signature. DRAWN , CHECKED & APPROVE.

Computer signature/ initials of the draftsman or engineer is required in the column DRAWN. Checked signature is to be done by an engineer. He is supposed to be aresponsible person for technical contents the in drawing. Approval should be given by otherperson. This is supposed to be an approval for expenditure for manufacturing the depictedcomponent

If a Draftsman, has drawn the drawing, & an engineer has checked the drawing & approvalcan be done by the same engineer, if authorized so.

,has to be given by the other authorized person

RELEASE SHEET-.

It is a Separate format made, which is to be filled in, & issued along with drawing prints. Aseparate number is allotted to each release sheet, through which DRAWINGS. SBM & BOMare released for a OA or Shop order. All documents need not be released at a time, but can

be released in groups. Each group is called release number. .List of departments is printedon the sheet . Concerned departments are marked to whom drawing is released .

This release sheet is to be used for first release of the document. If some drg or bom usedin a product is common to some other product it need not be released again. In case of anyspecific requirement from the user document reference can be given, on release sheet with

a special mention about it.


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DRAWING STANDARDS .


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I] IS STANDARDS --

IS 696- - CODE OF PRACTICE FOR - GENERAL ENGINEERING DRAWINGS (withdrawn )

IS 9609 PART (1) -1983 LETTERING OF TECHNICAL DRAWINGS.

IS 10164 - 1985 REQUIREMENT TO EXECUTE TECHNICAL DRAWINGS FOR MICRO COPING

IS 10714-1983 GENERAL PRINCIPLES OF PRESENTATION OF TECH DRAWING.

IS 107181983 METHOD OF DIMENSIONING & TOLERANCING OF CONES ON TECH DRAWINGS

IS 8000 PART (1) - 1985 GEOMETRICAL TOLERANCES ON TECHNICAL DRAWINGS FORMS ,LOCATION , RUN OUT & GEOMETRICAL DEFINITION

IS 8000 PART (2) -1992 MAXIMUM MATERIAL PRINCIPLE.

IS 8000 PART (3) -1992 DIMENSIONING & TOLERANCING OF PROFILE

IS 8000 PART (4) 1976 PRACTICAL EXAMPLES OF INDICATIONS ON DRAWINGS .

IS 11664 -1986 FOLDING OF DRAWING PRINTS

IS 11665 1985 TITLE BLOCK

.IS 11666 -1985. TECHNICAL DRAWINGS ITEM LIST

IS 11667 1985 INDICATION OF LINEAR & ANGULAR TOLERANCES ON TECHNICAL DRAWINGS


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IS 11668 1985 TECHNICAL DRAWINGS SPECIFIED REPRESENTATION OF CENTER HOLES

IS 11669 1986 GENERAL PRINCIPLES OF PRESENTATION OF TECH DRAWINGS

IS 11670 - 1993 TECHNICAL DRAWINGS ABBREVIATION SYMBOLS FOR USE IN TECHNICAL

DRAWINGS.

IS 3073 - 1967 ASSESSMENT OF SURFACE ROUGHNESS.

2] KPC STANDARDS

CODE & PRACTICE FOR DRAWING KPCL STD. NO- 999 700.

It consists of-Guidelines for lay out drawings, sectional views , spacingMat. Spec, alternative mat, heat treatment & special notesGuidelines for dimensioning & tolerancingGuidelines for checking & drawing detailsGuidelines for writing BOM & SBM

Guidelines for ECN writingGuidelines for metrication of drawings.Guidelines for drawing sheet sizes for SBM , BOM & folding of prints.Abbreviations & conventions to be used in drafting work

3] ANSI Y-14 5 M GEOMETRIC DIMENSIONING & TOLERANCING

basics of drawing for engineers

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