Figure 310 different styles of cutting plane section lines and arrowheads. In that way, the many hidden lines on the sketch are eliminated. The books are also suitable for craft level courses such as engineering and building related subjects and for industrial training courses where an understanding. The person who will read drawings have to learn what they mean. Expanding on its reputation as a trusted reference, this edition expands on the role that the 3d cad database plays in design and documentation. Object or visible lines thick dark line use to show outline of object, visible edges and surfaces. B a5 a5 b a5 b b b b generally a section callout consists of two circles, one on each end of the cutting plane line. However, lines that would be visible behind the plane projection must be included in the section view. Two types of lines are acceptable for cutting plane lines in multiview drawings.
When you select the cutting plane button and then select a part view, the command ribbon updates and displays commands for drawing a cutting plane. Cutting plane lines indicate a plane or planes exposed by cutting and removing an imaginary section of the object. Technical drawing glossary of technical drawing terms. They should be three times as long as they are wide. Line types are also a language type to communicate between technical people. Cutting plane a surface cut by the saw in the drawing above is a cutting plane. The name tsquare comes from the general shape of the instrument where the horizontal member of the t blade slides on the side of the drafting table. A bow compass b scale c dividers d extra leads ans. An example of this use of phantom lines is shown in the righthand view of figure 336. Ce 100 civil engineering drawing sessional lab manual. The short line segments extending from the circle represent the cutting plane line.
National aeronautics and space administration goddard space flight center greenbelt, maryland 20771 1994. The cutting plane may be a single continuous plane, or it may be offset if the detail can be shown to better advantage. Technical sketching and drawing if your making something that is less than simple it will almost always pay you to do some kind of drawing the try to get things straight in your head before you commit to cutting expensive materials up. Cutting plane line a cutting plane is represented on a drawing by a cutting plane line. The result is called a front section, or front view in section, since it replaces the front view in the drawing. I am using the asme format for my drawings and consequently i am questioning if this is correct. In the drawings that i have made where i have created cutting planes for section views, the line type for the cutting plane is shown as a solid line. It is very important to visualize what the part will look like after it is cut open. The arrows at the end of the cutting plane lines are used to indicate the direction in which the sections are viewed. Cutting plane lines, together with arrows and letters, make up the cutting plane indications. Abc, find the piercing point by the cutting plane method. Cutting plane line is drawn to show the location of a cutting plane. Section 11 general principles of dimensioning on technical drawings.
The last method of drawing cutting plane lines is used when there is a great deal of drawing detail within the object. In this sample chapter from engineering design graphics with autodesk inventor 2020, author james d. Engineering drawing app for civil,mechanical,electrical engineers professionals. A break lines b phantom lines c extension lines d cutting plane lines ans. Key principles to finding the line of intersection between two planes lamina using cutting planes. In either case, the lines should be drawn to stand out clearly on the drawing. When drawing an offset cutting plane line, show the line in either horizontal or vertical line segments. A line drawn on a view where a cut was made in order to define the location of the imaginary section plane.
A sectional drawing based on a cutting plane line that cuts through onequarter of an object. It is a language of communication between architects and engineers, usually to convey information about the object. It is longdashed dotted narrow line, made wide at the ends, bends and change of direction. Which type of line is particular to section drawings. Offset section views orthographic views adobe press.
Plane parallel to pp and perpendicular to both hp and vp 26. The fundamentals of design drafting a students guide. What does 1410 represent on an architectural drawing of a house. Viewing plane lines indicate the plane or planes from which a surface or several surfaces are viewed. Technical drawing lines are used for different purposes to provide specific information for designers, manufacturers, etc. Viewing or cutting plane lines viewing plane lines are used to indicate the plane or planes from which a surface or several surfaces are viewed. Fundamentals of technical drawing technical drawing. Plane and solid geometry is the first of three books which together provide comprehensive coverage of all aspects of secondary school technical drawing syllabuses.
Center lines in cases when a cutting plane is clear, it may not be necessary to use a cutting plane line. The arrows at the ends of cutting plane line point in the direction of sight for front section. Break lines would be used to eliminate the section between the threaded sections to shorten the object. Make sure you understand the use of the viewing plane line to show an additional view. Linetype sets the linetype of cutting plane line segments. Key to successful drafting is to have a good technical knowledge of these various line characteristics to understand where and when to apply them in technical drawing. Drawing construction lines construction lines are drawn in the form of line strings. The cutting plane line reveals the type of material that the object is to be made from. Cutting plane lines are thick lines that run through the center of the object that the interior wants to provide an interior view of.
Cutting plane lines are used to indicate a plane or planes in which a sectional view is taken. The cutting plane should pass through the main part of the object. This crosssectional view section aa, figure 17, one that is orthogonal to the viewing direction, shows the relationships of lengths and diameters better. A good freehand line shows freedom and variety, whereas a line drawn using cad or instruments should be exact. In this last method, snap a leader with a 90 o angle to the midpoints of your object as done previously. Engineering drawing app technical,civil,mechanical for.
The cutting plane line is defined as aa, and the section view is. Figure c also illustrates how hidden lines in a section eliminate the need for an additional view. A half section reveals half of the interior and half of the exterior. Hidden lines behind the plane of projection are customarily omitted, while lines visible behind the plane of projection must be included in the sectional view. Technical drawing with engineering graphics 15th edition edit edition.
Cross hatching in the section view shows the solid surface of the object which were cut through to produce the section. These drawings are easier to make than isometric drawings. To draw a construction line, click on the place construction line tool and start drawing the first line by clicking anywhere in the active drawing plane then move the mouse cursor and click to place the line endpoint, you can use point snaps, direction snaps, drawing guides and the protractor to. Technical drawings lines,geometric dimensioning and. To change the section view direction, edit the view direction lines on the selected cutting plane. You can use fill and hatch styles to define the patterned area of a section view. However, cutting lines indicate that an imaginary plane is passed through the item. Technical drawing is concerned mainly with using lines, circles, arcs etc. A good freehand line is not expected to be as rigidly straight or exactly uniform.
The offsets or bends in the cutting plane are all 90 degrees. The following chart shows technical drawing lines that describe a piece of machinery with a swinging arm. Either of the line types shown in figure 310 may be used. A cutting plane can consist of a single line or multiple elements, such as lines and arcs. This app also helpful for teachers,professors who teaches. Two perpendicular lines with arrows showing in which direction the interior of the object should be viewed are drawn at the end of the line. The following slides will help show the several methods or types of section views. The path of the cutting plane is shown by the cutting plane line in the top view of fig. Why do we draw sectional views sections and cutting plane lines hidden lines in sectional views lines behind the cutting plane section lining practices, techniques and symbols draw sectional view. Section views are used to give a clearer view of the interior or hidden feature of an object that normally cannot be clearly observed in conventional outside views. Cutting plane lines in drawings autodesk community.
Can also be a useful tool for technical 2d drawings can be used to produce 2d technical drawings but tailored more towards 3d renderings than 2d line drawings now create hull lines for a canoe hull. All of the red bent arrow lines with notes are the leaders. The 15th edition of gieseckes technical drawing and engineering graphics is a comprehensive introduction and detailed reference for creating 3d models and 2d documentation drawings. Architectural symbols and conventions section marks the arrow can be left open or colored in. The upper view of figure 337 shows a plan view of a pipe sleeve. A cutting plane line shows where object was cut to obtain the section view. If you click select color at the bottom of the color list, the select color dialog box is displayed. Home mechanical engineering college of science and. Which angle cannot be made with either a 45 or 3060 triangle or a combination of the two. Dwg 001 blueprint reading line standards drawing symbols. Diagonal lines crosshatches show regions where materials have been cut by the cutting plane. Welcome to the department of mechanical engineering, part of the college of science and engineering, serving the state and nation as a leading center of education, research, and innovation. Arrowheads used to terminate dimension lines and leader lines and on cutting plane lines and viewing plane lines.
Define the type and size of cutting plane lines and arrows on the lines tab in the drawing view style dialog box. The cut line is called a cutting plane, and can be done in several ways. Show cutting plane lines when selected, displays line segments to indicate the entire cutting plane. A section view is a view used on a drawing to show an area or hidden part of an object by cutting away or removing some of that object. Patent drawing conventions the patent drawings company. Actually, it is an imaginary cutting plane taken through the object, since the object is imagined as being cut through at a desired location.
Plane parallel to hp and perpendicular to both vp and pp 25. Cutting plane tab section view style manager autocad. How lettering and dimensioning is done in engineering drawing. Technical drawing specifications resource using these lines all lines on any particular drawing should be either in pencil or ink, but not a mixture of both. Technical drawing with engineering graphics, 15th edition. Parts situated in front of the cutting planes, outlines of adjacent parts, censorial lines, to state center of gravity application of the technical drawing lines technical drawing lettering technical lettering is used for writing or forming letters of titles, subtitles, dimensions, scales and other details in technical drawing. Sometimes only the two ends of a cutting plane line are shown to avoid obscuring other lines on the plan. Cutting plane tab section view style manager autocad 2016. Section a a using these lines visible lines are used to show a change in direction on each surface of a threedimensional form. When cutting planes pass through holes, you should never section the hole. Mcq on engineering drawinggraphics royal mechanical. Creating one of the standard two types of cutting plane lines would make the drawing confusing to the reader.
The chief difference between a drawing and a freehand sketch lies in the character or technique of the lines. Cutting plane lines, together with arrows and letters, make up the cutting. B phantom lines c extension lines d cutting plane lines ans. All the students and professional of civi,mechanical,electrical can use this app to learn the drawings of engineering. Line styles are used to clarify important features on drawings. The ends of the lines are bent at 90 o and terminated by arrowheads. You draw a cutting plane using many of the drawing tools. In a section view, you take an imaginary saw and cut the object along a section plane. These lines are omitted by general custom, the custom being based on the fact that the elimination of hidden lines is the basic reason for making a sectional view.
At latest count, the department has 43 active faculty, 56 staff members, 311 graduate students, 50 postdoctoral associates, research associates and visitors. Lines on drawings should be selected according to their application see table 1 for preferred line types. Cutting plane lines are used to show where an imaginary cut has been made through the object in order to view interior features. Engineers use cutting plane lines on the plans they are drawing up to differentiate what is inside an object and what lies outside it. Section lines sometimes the technical information conveyed by a drawing can best be shown by a view that represents the object as it would look if part of it were cut away.
One of the outcomes of using section views in a technical drawing is the elimination of hidden lines. It is important to use only one type of cutting plane line on a single drawing. The line type is phantom and the line weight is very thick 0. Bme faculty of architecture department of building constructions technical drawing guide 3 an architectural floorplan is a drawing that cuts the building with a horizontal plane at a height of 1,00 m above floor finishing level. I am a student in a drafting 1 class and we are going over all of the section views full, half, revolved, offset, etc. Cutting plane lines and the interior features of the object they bisect are never in the same color as the rest of the plan. The engineering technical drawings all in one app for engineers engineering drawing app for civil,mechanical,electrical engineers professionals. A drawing instrument set usually contains all of the following, except. Technical drawing specifications timboon p12 school.
Section view that shows features that do not lie in a straight line by offsetting or bending the cutting plane aligned section section view with the cutting plane line bent to pass through the angled arm and then revolved to a vertical position, from where it was projected across to the sectional view. Section views are only used for mechanical drawings. Cutting plane lines in drawings in the drawings that i have made where i have created cutting planes for section views, the line type for the cutting plane is shown as a solid line. Examples of commonly used line types in theatrical technical drawing. Cutting lines are similar to viewing lines in that they show the item from another direction. Even while adding a line you need to follow the guidelines meant for line styles in a patent drawing. Since technical drawings are made of lines, it is logical that the first step in learning to read a drawing is to learn the meaning of each kind of line. In the figure the cutting plane line is drawn in the top view, which is adjacent to the sectioned front view. Sectional views basic blueprint reading pressbooks. Now, if you were to look at the side of the car, the passengers door, passenger seat. Sections are used to show interior details clearly. The general recommendations are that thick lines to be twice as thick as the thin lines.
Engineering drawing app technical,civil,mechanical apps. Type a continuous, thick visible outlines of the drawing. A cutting plane is represented on a drawing by a cutting plane line. A tsquare is a technical drawing instrument primarily used for drawing horizontal lines on a drafting table, it is also used to guide the triangle that is used to draw vertical lines. Make sure you understand the use of the cutting plane line to show the section. The extra view is typically a crosssection of the item. Anyways im reading from the book and i still dont understand it very well. Introduction welcome to the fundamentals of design drafting. You can show the exterior features just fine, but how do you show the interior features. The content presented in the fundamentals of design drafting text is written to assist students in learning and developing a core knowledge of designdrafting and skillbuilding procedures. Arrows are placed at both ends of the cutting plane line to indicate the direction of sight. Drawing section views middlesex county vocational and. These are extended by a short distance beyond the outline of the drawing. Cutting planes are to shown using a type h line with the direction of viewing show by an arrowhead and a letter placed at the tail of the arrow.
Cutting plane lines which show where the cutting plane passes through the object, represent the edge view of the cutting plane and are drawn in the views adjacent to the section view. However, it is very important that the drawing produced to be accurate and clear. The engineering technical drawings all in one app for engineersengineering drawing app for civil,mechanical,electrical engineers. The default content and appearance of cutting plane lines, terminators, and captions is defined in the drawing view style that is applied to the view. Plane surface perpendicular to one plane and inclined to the other two 27. The exposed plane is called the sectional view and the line used to cut the object is referred to as the cutting plane line. Line color sets the color of cutting plane line segments. A drawing instrument set usually contains all of the following. Orthogonal drawing shows in most cases three sides. If the cut followed one vertical line part of the way down and then was offset to a different line, it would be an offset section. Piercing point cutting plane method given a line, l, and a plane in two adjacent views, 1 and 2, where the plane is defined by. Engineering drawing standards manual mechanical engineering branch goddard space flight center greenbelt, maryland august 1994 n a t i o n a l i a e r o n a u t i c s a n d s p a c e a d m i n s t r a t i o u. The cutting plane line bisects the object and provides a view of its interior features.
133 920 692 695 1436 1459 1229 354 937 77 60 40 153 765 1463 901 359 507 1234 962 440 122 364 1374 1378 1288 302 69 461 904 140 1111 619 816 223 854 881 75