KPC/ME 6th Semester/ Drawing Procedure of a Knuckle Joint on AutoCad 2D/Ms.Smriti Bhakat

1. By Miss Smriti Bhakat

2.  A knuckle joint is a mechanical joint used to connect two rods which are
under a tensile load, when there is a requirement of small amount
of flexibility, or angular moment is necessary.There is always axial or
linear line of action of load.
 The knuckle joint assembly consists of the following major components:
 Single eye.
 Double eye or fork
 Knuckle pin.
 At one end of the rod the a single eye is formed and a double eye is
formed at the other end of the rod. Both, single and double eye are
connected by a pin inserted through the eye.The pin has a head at one
end and at other end there is a taper pin or split pin. For gripping
purpose, the ends of the rod are of octagonal forms. Now, when the two
eyes are pulled apart, the pin holds them together.The solid rod portion
of the joint in this case is much stronger than the portion through which
the pin passes.

3.  Tie rod joint of roof truss.
 Tension link in bridge structure.
 Link of roller chain.
 Tie rod joint of jib crane.
 The knuckle joint is also used in tractor.

5.  Line & Construction Line:-

6.  Line & Construction Line:-
 To Draw Lines
 Click Home tab > Draw panel > Line. Find.
 Specify the start point and end point of the line segment
by clicking in the drawing area.
 Continue specifying additional line segments.To undo the
previous line segment, enter u at the prompt. ...
 Press Enter or Esc when done or enter c to close a series of
line segments.
 Construction lines (also known as xlines) are temporary
linework entities that can be used as references when
creating and positioning other objects or linework.
... Construction lines are either circles or
straight lines that extend to infinity in both directions.

7.  Offset:-Creates concentric circles, parallel lines, and parallel
curves.You can offset an object at a specified distance or
through a point. After you offset objects, you can trim and
extend them as an efficient method to create drawings
containing many parallel lines and curves.The OFFSET
command repeats for convenience.

8.  Mirror:-The Mirror command creates a reverse copy of an object in AutoCAD.
After you select some objects, AutoCAD prompts you to select two points that
define a line about which the objects will be mirrored. ... Specify the start of
the mirror line by clicking a point or typing coordinates.
 To Draw mirror images:-
 Click Home tab Modify panel Mirror. Find.
 Select the objects to mirror.
 Specify the first point of the mirror line.
 Specify the second point.
 Press Enter to retain the original objects, or enter y to erase them.

9.  Circle:- Creates a circle with a specified radius and tangent to two objects. ...
The program draws the circle of the specified radius whose tangent points are
closest to the selected points.
 Draw a Circle by Center and Radius or Diameter
 Do one of the following:Click Home tab Draw panel Circle drop-down Center,
Radius. Find. Click Home tab Draw panel Circle drop-down Center, Diameter.
Find.
 Specify the center point.
 Specify the radius or diameter.

10.  Trim:-Trim is an option which is used to remove the Excess line or Extra part of the
line,but for Removing that you need one destination point(any perpendicular line at
the end) Example… By using line command you drawn some thing like a Rectangular
box.
 ToTrim an Object
 Click Home tab Modify panel Trim. Find.
 Select the objects to serve as cutting edges. Press Enter when you finish selecting the
cutting edges. ...
 Select the objects to trim and press Enter a second time when you finish selecting the
objects to trim.

11.  Fillet:- A fillet or round connects two objects with a tangent arc in 2D, or
creates a rounded transition between the adjacent faces of a 3D solid.An
inside corner is called a fillet and an outside corner is called a round; you
can create both using the FILLET command. ... 3D solids and surfaces
(not available in AutoCAD LT)Arcs.
 Add A FilletWithoutTrimming the Selected Objects or Line Segments
 Click Home tab Modify panel Chamfer and Fillet drop-down menu Fillet.
Find.
 At the Command prompt, enter t (Trim).
 Enter n (NoTrim).
 In the drawing area, select the objects or line segments that define the
points of tangency for the resulting arc.

13.  Spline:- Creates a smooth curve that passes through or
near a set of fit points, or that is defined by the vertices in
a control frame. SPLINE creates curves called nonuniform
rational B-splines (NURBS), referred to as splines for
simplicity. Splines are defined either with fit points, or
with control vertices.
 Draw a Spline
 Click Home tab Draw panel Spline.
 (Optional) Enter m (Method).Then enter either f (Fit
Points) or cv (ControlVertices).
 Specify the first point of the spline.
 Specify the next point of the spline. Continue specifying
points as needed.
 Press Enter to end, or enter c (Close) to close the spline.

15.  Hatch:-The hatch command in AutoCAD is used to fill an area or selected
objects with a hatch pattern or a fill. ... Choose between Solid,Gradient, Pattern
or User Defined. 3. Further specify the pattern on the Pattern panel.
 Click Home tab Draw panel Hatch. Find
 On the Properties panel HatchType list, select the type of hatch that you want
to use.
 On the Pattern panel, click a hatch pattern or fill.
 On the Boundaries panel, specify the how the pattern boundary is selected:
 Pick Points. Inserts the hatch or fill within a closed area that is bounded by one or more
objects. With this method, you click within the boundaries to specify the area.
 Select Boundary Objects. Inserts the hatch or fill within a closed object, such as a circle,
closed polyline, or a set of objects with endpoints that touch and enclose an area.
 The selection method is retained until you change it.
 Click an area or object to be hatched.
 On the ribbon, make any adjustments as needed:
 On the Properties panel, you can change the hatch type and colors or modify the
transparency level, angle, or scale for the hatch.
 On the expanded Options panel, you can change the draw order to specify whether the hatch
and its boundary are displayed in front of or behind other objects.
 Press Enter to apply the hatch and exit the command.