Technical Drawing

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· They are the leaves where the drawings are made.
· These have special characteristics such as:
- Margins.
- Dimensions.
- Table of labeling.
- Signs of orientation.
- Centered.
- Bending.
· All these features are normalized by the UNE noma: 1026-2 83 PART 2. n SYSTEM:
· Is the most used.
· The different types there are A0, A1, A2, A3, A4, A5, ETC ...
· AO = 1189 mm x 841 mm.
· Other formats are obtained by folding in half the longest side of the previous format.
AA0841 Series 1189A1594 x x 841A2420 x 594A3297 x 297A5148 x 420A4210 X 148A774 x 210A6105 x 105A852 x 74A937 x 52A1026 x 37
· The margins should be:
- Not less than 20 mm formats to A0, and A1.
10 mm formats to A2, A3 and A4.
- The side folding margin is 20mm. No Box Facility:
· Is the area of placement:
Legends Box Facility.
Relevant information.
· This standard for storage and transportation. No SYSTEMS REPRESENTATION:
· Its purpose is two-dimensional surface representing three-dimensional object in space.
· Is based on the projection of objects with flat projection. No representation type:
· Cylindrical orthogonal:
- Projecting rays are parallel to each other and perpendicular to the plane of projection.
- All dimensions are represented in their true magnitude.
- It is used for design of parts and machinery.
· Cylindrical oblique
- Projecting rays are parallel but with a different angle from 90 ° to the projecting plane.
- The dimensions of certain edges may have a reduction factor or scale.
· Having multiple:
Fits any views or representative of the piece, with the minimum # of views defined on a vocation inequib. - The main sights are:

FRONT: Elevation.
SUPERIOR: plant.
SIDE: right profile.
LOWER: below.

· European System:
- Facing the elevation is shown behind the object.
· American System:
- Facing the front elevation of the object is represented. No oblique cylinder PROJECTIONS:
· Projecting rays form an angle of 45 degrees to the plane of projection.
· No reduction coefficient suffers axis or scale.
· Is used to represent edges in its true light.
· Not actually cause the strain produced. No axonometric projection (oblique)
The projection plane is not parallel to any of the three axes of the object.
· Depending upon how the angle can be of type: · Isometric Projection:
- The three axonometric axes form angles are equal.
- The scale measures the same three isometric axes.
- Has Ability to obtain actual measurements of dicahas views. · Designing Dimetra:
- When 2 of the 3-axis angles are axometricos.
- The 2-axis are equal to the same scale the 3rd is different from these.
- It is a somewhat real but difficult to obtain the true size piece. · Designing Trimetric:
- The 3 angles are axonometric axes are dieferentes.
- Each axle has its own scale.
- Da vitality and reality to the piece.
- It is difficult to obtain dimensions of the edges. No Conic:
· With this projection point is obtained relatively close observation of the object.
· Is used for architectural design.
· The dimensions of almost all the edges are subject to scale.
· Representation system is more lifelike.
The vanishing point is a point representing the lateral edges that converge to give depth to the object. · Perspective vanishing point:
- Is obtained when the projection plane is parallel to one side of the object.
- In the front is the true magnitude. · Perspective with two vanishing points:
- Is obtained when the projection plane is parallel to one of the three axes.
- Only one edge is in true scale. · Perspective three vanishing points:
- Is obtained when none of the three axes parallel to the plane of projection.
- None of the edges is in true scale. No ELECTION OF STANDARD:
· NORMA UNE: 1-032-82.
· We choose a more characteristic view of the object as the primary.
· A to have the least # of hidden edges.
· A, it will produce the most simplified view other possible.

· Court:
- It is a device in which represent the part by eliminating some of the same.
- The cut surface is shown striped.
- Types of court:
SECTION Abate. Without scrolling.
· Section:
- Intersection of shear plane with the part.
- Does not represent the rest of the room leaving behind the rest of it.
- It is more clear and straightforward representation. · Dejected Lines:
- Use to draw long items and uniforms that are interrupted by the break.
Breakage saves space representation.
Suppresses constant and regular parts of the piece. Refine
Limited representation of the piece. Define.
· General principles:
- For a piece that perfectly bounded, indications of the dimensions should be the minimal, sufficient and appropriate to enable the manufacture of the same.
· General Points of quotation:
1.A elevation indicating once unless it is necessary to repeat it.
2.No miss any altitude.
3.La bound be placed on views that clearly represent the elements.
4.Any the quotas are in the same units, different units may be used to express it clearly.
5.No were then refined those avenues diemsiones result of Hull's manufacturing highway procedures.
6.La elevation be placed inside the piece, is allowed inside when the picture does not lose clarity.
7.No except hidden edges were then refined to avoid additional views.
Quotas are distributed 8.Las sort criteria, correctness and aesthetics.
9.The dimensions of depth and diameter of the holes are indicated in the same view.
10.Evitara obtaining bounds for sum and differential since it can lead to errors.
· ELEMENTS Statement:
- Linea altitude.
- Numbering.
- Symbol of elevation. No VIEWS:
· Orthogonal projections of an object, according to different addresses where Mieres.
· Types: - Knight: A Perspective on the oblique projecting rays form an angle of 45 degrees.
- ISOMETRIC: Obtained when the size of a body in the three main dimensions are drawn using the same scale.
- Taper: Representation ofa subject through his image obtained by projection from a close viewpoint.

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