Everyone should know that there are many kinds of cad for beginners, but many laymen don't know what cad drawing means, how to operate and get started. The following is a tutorial for beginners of CAD drawing.

Beginners' Course of cad Drawing 1 CAD Course: Graphic Editing and Modification

1, graphic displacement

① move the drawing: select Modify/Move, or click the Move button, or enter Move at the command line to execute. You can translate one or more objects to a new location, which is equivalent to deleting the copy and paste of the source object.

② rotate the graph: select Modify/Rotate, click the Rotate button, or enter rotate at the command line to execute. You can change the orientation of the object and position the new orientation according to the specified base point and angle. Generally speaking, in the command of moving and rotating, the specification of base points needs to be completed with the object capture function, and the base points are some points with special positions.

2. Graphic modification

① Delete the graph: select the modify/delete command, or click the delete button, or enter erase in the middle command line. After selecting the delete command, the cross cursor on the screen will turn into a pick-up box. Select the object you want to delete, and then press enter. The quickest way to delete is to select the object first, and then call the delete command or key. You can also use the Cut to Clipboard method to delete objects.

② Stretch the drawing: you can stretch the selected part of the object, but no selected part remains unchanged. When using the stretch graphics command, the part outside the graphics selection window will not change; The part in the drawing selection window will move with the movement of the drawing selection window, but it will not change its shape.

Select the Modify/stretch command, or click the Stretch button, or enter stretch on the command line to execute the command. You must select the object to be stretched by crossing windows or polygons.

③ Extend the graph: you can extend the selected object to the specified boundary. You can extend lines, rays, arcs, elliptical arcs and unclosed polylines to specified lines, rays, arcs, elliptical arcs, polylines, construction lines and regions.

Execute by selecting the Modify/extend command, or clicking the Extend button, or entering extend on the command line. Extensible objects must be objects with endpoints, such as lines and multilines, but not objects without endpoints, such as circles and reference lines. First, specify the extension boundary, and then select the object to extend.

④ Trim the graph: you can cut the selected object on one side of the specified boundary. The objects that can be trimmed include: lines, rays, arcs, elliptical arcs, polylines, construction lines and spline curves. Effective boundaries include straight lines, rays, arcs, elliptical arcs, polylines, construction lines and filled areas. First select the cutting edge, and then select the trimming object.

⑤ Interrupt graph: used to interrupt the selected object, that is, to divide the selected object into two parts or delete a part of the object. This command works on lines, rays, arcs, elliptical arcs, polylines and structural lines.

Interrupting this command will delete the part of the object between the first point and the second point. The first point is the pick-up point when the object is selected, and the second point is the selected point. If the selected second point is not on the object, the system will select the nearest point on the object. Select the modify/interrupt command, or click the interrupt button, or enter break on the command line to execute it. For the interruption of a circle or arc, it is counterclockwise.

⑥ Fillet and chamfer: Two straight lines, arcs, elliptical arcs, polylines, construction lines and spline curves are selectively connected by predetermined arcs or straight line segments.

Select the command to modify the fillet, or click the fillet button, or enter fillet at the command line to execute the command. After activating the fillet command, you can complete the fillet operation of the corner by setting the radius parameter and specifying both sides of the corner.

Select the Modify/chamfer command, or click the Chamfer button, or enter Chamfer at the command line to execute it. After executing the chamfering command, you need to specify both sides of the corner in turn and set the chamfering distance on both sides. The chamfer size is determined by two distances.

⑦ Zoom the graph: enlarge or reduce the selected graph evenly in proportion. You can specify the base point and length, or enter a scale factor to scale the object. You can also specify a current length and a new length for the object. The scale factor greater than 1 is the magnified object, and the scale factor between 0 and 1 makes the object smaller. Select the Modify/Zoom command, or click the Zoom button, or enter scale on the command line to execute the command.

⑧ Decomposition graph: it is mainly used to decompose an object into several single objects. It is mainly applied to the decomposition of objects such as whole graphics, blocks, words and dimensions. Select the Modify/Disassemble command, or click the Disassemble button, or enter explode on the command line to execute the command.

Pet-name ruby merge graphics: merge interrupted objects or similar objects into one object. You can create complete circles and ellipses using circular arcs and elliptical arcs. Merge objects include: arc, elliptical arc, straight line, polyline and spline curve. Select the Modify/Merge command, or click the Merge button, or enter join on the command line to execute.

Cad Drawing Beginners Tutorial 2 What is cad Drawing?

Cad drawing is a powerful software, which is also applied in many industries and fields. It uses computers and their graphic devices to help designers with their design work. Cad drawing has undergone many changes.

At first, this field was mainly used to make similar hand-drawn drawings. Nowadays, cad is not only used for drawing and displaying, but also begins to enter a more "intelligent" part of designers' professional knowledge. Therefore, it is necessary to master cad drawing technology.

Introduction to cad drawing for beginners

Cad It is a visual drawing software, and many commands and operations can be realized through menu options and tool buttons. For beginners, just find the relevant button to operate.

Firstly, establish a layer, including name, line width and line type; Secondly, determine the drawing scheme, and follow the principle of "center first, then part" in the drawing process. First, determine the center line of the drawing, then slowly draw the local edge, and finally finish the whole drawing by trimming.

But for beginners, there are often many mistakes in the drawn drawings, so we must form the habit of regular inspection, find out the shortcomings and problems of our own drawings through constant comparison, and then constantly correct them.

Cad drawing beginner's course 3 1. In order to determine the center of the circle, we first draw two auxiliary lines.

2. Draw a circle with diameters of 14 and 28 directly with the circular tool.

3. Use the offset tool to draw several auxiliary lines to determine the center of the circle, as shown in the figure.

4. After drawing the auxiliary line, we can draw several circles, as shown below.

5. Then according to the length given in the figure, we can know that the diameter of the small circle is 17. Then two vertical straight lines will be drawn, as shown in the figure.

6. After using the construction tool, enter the command to use the tangent point, tangent point and radius of the circle at the command line, and specify the first tangent point and the second tangent point of the object and the circle. We can draw a picture.

7. Using the fillet tool, enter a radius of 2 1, select an object, and then press Enter.

8. Then use the trimming tool to trim off the redundant lines.

9. The radius of the display circle is R 14 and 58mm and 49mm of the straight line. You can know the center of R 14. You can also draw a circle with a diameter of 14. Finally, connect other lines.