Tool Design - AutoCAD Application in the area of MOLD DESIGN / PRODUCT DESIGN - PART:-2

UTILITY COMMANDS USED IN THE MOLD DESIGN BY USING CAD

 The following is an alphabetical list of commands used in development of the standard mold base and design of molds. 

S.No.	COMMAND	DESCRIPTION	REMARKS
1	ARC	Draws an arc of any size.  The default method is by specifying two ends points and a point along the arc, but several other methods are available.	This command is effectively used in the product development.
2	AREA	Computes the area of a polygon, polyline, or circle.	Used in the calculation of core and cavity development and clamp-force factors.
3	ARRAY	Makes multiple copies of selected objects in a rectangular or circular plan.	Polar circular array and rectangular array is used in core and cavity layout plan.
4	ATTDEF	Creates an Attribute definition entity for textual information to be associated with a Block Definition.	Preparation of database for standard mold parts.
5	ATTEDIT	Permits editing of Attributes.	Used in preparation of database.
6	AXIS	Displays a “ruler line” on the graphics monitor.	Gives on-line element locations.
7	BLOCK	Forms a compound object from a group of entitles.	Development of database for mold parts e.g. guide pillar, screws, guide bush, locating ring etc.
8	CHAMFER	Creates a chamfer at the intersection of two lines.	Used in detailed designs and drafting.
9	CHPROP	Modifies properties of selection objects.	Used in the editing during the mold drafting to alter the part positioning.
10	CIRCLE	draws a circle of any size.  The default method is by centre point and radius, but other methods are available.
11	COLOR	Establishes the color for subsequently drawn objects.	To differentiate the important parts like core and cavity in the assembly different colours may be used.
12	COPY	Draws a copy of selected objects.	Used in cavity and runner layout design for multi-impression molds.
13	DELAY	Delays execution of the next command for and for a specified time.  Used with command scripts.
14	DIM	Invokes dimensioning mode, permitting many dimension notations to be added to a drawing.	Used in dimensioning of the mold parts.
15	DIM 1	Allows one dimension notation to be added to a drawing then returns to normal command mode.	Used in dimensioning of the mold parts.
16	DIST	Finds distance between two points.	Used to check the exact position of cavity and runner positions.
17	DIVIDE	Places markers along a selected object, dividing it into a specified number of equal parts.	Used to divide core and cavity into required number of parts for the analysis purpose.
18	DOUGHNUT or DONUT	Draws rings with specified inside and outside diameters.	Used to highlight the impression or molding.
19	DTEXT	Draws text items dynamically.	Preparation of title blocks, bill of materials.
20	DVIEW	Defines parallel or visual perspective views dynamically.	To view the core and cavity assembly in different angles.
21	ELEV	Sets elevation and extrusion thickness for subsequently drawn entities.  Used in 3D visualizations.	Modifying thickness of mold core and mold plates.
22	ELLIPSE	Draws ellipses using any of several specifications.
23	END	Exits the drawing editor after saving the updated
24	ERASE	Erases entities from the drawing	Used for editing the existing drawings.
25	FILL	Controls whether solids, Traces, and wide Polylines are automatically filled on the screen and the plot output.	Cavity development.
26	FILLET	Constructs an arc of specified radius between two lines, arcs, or circles.	Detailed drawing works.
27	GRID	Displays a grid of dots, at desired spacing, on the screen.	This feature helps to get a sense of the sizes of drawing entities and this relationship.  The grid is not considered part of the drawing, it is for visual reference only and is never plotted.
28	HATCH	Perform crosshatching and pattern filling.	Hatching generates line entities for the chosen pattern and adds them to the drawing.  Since a pattern may contain many lines, CAD normally groups there lines into an internally generated block.
29	‘HELP or ‘?	Displays a list of valid commands and data entry options or obtains help for a specific command.	Displays a list of valid commands and data entry options or obtains help for a specific command.
30	HIDS	Regenerates a 3D visualization with “hidden” lines removed.	Regenerated a 3D visualization with “hidden” lines removed.
31	LAYER	Creates names drawing layers and assigns color and linetype properties to those layers.
32	LIMITS	Changes the drawing boundaries and controls checking of those boundaries.
33	LINE	Draws a straight lines of any length.
34	LINETYPE	Defines linetypes (sequences of alternating line segments and spaces), loads them from libraries, and sets the linetype for Subsequently drawn objects
35	LIST	Lists database information for selected objects.
36	LTSCALE	Sets scale factor to be applied to all linetypes within drawing.
37	MEASURE	Places markers at specified intervals along a selected object.
38	MIRROR	Reflects designed entities about a user specified axis.
39	MOVE	Moves designated entities to another location.
40	MULTIPLE	Causes the next command to repeat until canceled.
41	ORTHO	Constrains drawing so that only lines aligned with the grid can be entered.
42	PLAN	Puts the display in PLAN view (V POINT 0, 0, 1) relative to either the current UCS, a specified UCS, or the World Coordinate System.
43	PLOT	Plots a drawing on a pen plotter.
44	POLYGON	Draws regular polygons with the specified number of side.
45	QUIT	Exists the Drawing Editor and returns to AUTOCAD’S Main Menu, discarding any changes to the drawing.
46	SAVE	Updates the current drawing file without exiting the Drawing Editor.
47	SCALE	Alters the size of existing objects.
48	SHAPE	Draws pre-defined shapes.
49	SKETCH	Permits free-hand sketching.
50	SOLID	Draws filled in polygons
51	STATUS	Displays drawing statistics & modes.
52	STRETCH	Allows you to move a portion of a drawing while retaining connections to other parts of the drawing.
53	STYLE	Creates named text styles, with user selected combinations of font, mirroring, obliquing, and horizontal scaling.
54	TEXT	Draws text characters of any size, with selected styles.
55	TIME	Displays drawing creation and update times, and permits control of an elapsed timer.
56	UNITS	Selects coordinate and angled display formats and precision.
57	VIEWPORTS OR  VPORTS	Divide AUTOCAD’S graphics display into multiple viewports, each of which may contain a different view of the current drawing.
58	VPOINT	Selects the viewpoint for a 3D visualization.
59	3D FACE	Draws three-dimensional plane sections.
60	3D MESH	Defines a three dimensional polygon mesh by specifying its size (in terms of M and N) and the location of each vertex in the mesh.
61	3DPOLY	Creates a three-dimensional polyline.

DIMENSIONING COMMANDS

COMMAND

DESCRIPTION

ALIGNED ANGULAR BASELINE CENTRE CONTINUE DIAMETER EXIT HOMETEXT HORIZONTAL LEADER NEWTEXT RADIUS REDRAW RPTATED STATUS STYLE UNDO UPDATE VERTICAL

Generates a linear dimension with the dimension line parallel to the specified extension line origin points.  This permits you to align the dimensioning notation with the object. Generates an arc to show the angle between two nonparallel lines. Continues a linear dimension from the baseline (first extension line) of the previous dimension. Draws a Circle/Arc centre mark or centre lines. Continues a linear dimension from the second extension line of the previous dimension.  In effect, this breaks one long dimension into shorter segments that add up to the total measurement. Dimensions the diameter of a circle or arc. Returns to the normal Drawing Editor command mode. Restores the text of an associative Dimensions. Generates a linear dimension with a horizontal dimension line. Draws a line or sequence of lines (similar to the normal LINE command) for controlled placement of dimension text.  Useful mostly for radius and diameter dimensioning. Changes the text of existing associative Dimensions. Dimensions the radius of a circle or arc, with an optional centre mark or centre lines. Redraws the entire display, erasing any marker “blips” that were present (just like the normal REDRAW command). Generates a linear dimension with the dimension line drawn at a specified angle. Displays all dimensioning variables and their current values. Switches to a new text style. Erases the annotations produced by the most recent dimensioning command. Updates existing associative Dimension entities to use the current settings of the dimension variables, the current UNITS settings. Generates a linear dimension with a vertical dimension line.

OBJECT SELECTION :

OBJECT SELECTION OPTION

MEANING

POINT MULTIPLE LAST WINDOW CROSSING BOX AUTO PREVIOUS ADD REMOVE UNDO SINGLE

Selects one object that crosses the small “pick box”.  If no object crosses the pick box and Auto mode has been selected, this designated point is taken as the first corner of a Crossing or window box. allows selection of multiple objects using a single search of the drawing.  the search is not performed until you give a null response to the “select objects” prompt. selects the most recently drawn object that is currently visible. Selects all objects that lie entirely within a window. Selects all objects that lie within or cross a window. Prompts for two points.  If the second point is to the right of the first point, selects all objects inside box (like “Window”).  Otherwise, selects all objects within or crossing the box (like “crossing”). Accepts a point, which can select an object using the small “pick box”.  If the point you pick is in an empty area, it is taken as the first corner of a “Box” (see above). Selects the previous selection set. Establishes “add” mode to add following objects to the selection-set. Sets “remove” mode to remove following objects from the selection-set. Undo (remove objects last added). Sets “single” selection mode.  As soon as one object or one group of objects via Window/Crossing box) is selected, the selection-set is considered complete and the editing command uses it without further user interaction.

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