How to draw a three-dimensional spiral: ① Open the website of Autodesk Company/ICAD/Share/AutocadTool.htm and click: 3dspiral.zip, a downloadable software for drawing spiral: "3dspiral. Lsp "and copy it to a folder under your computer's hard disk; ② Open the drawing interface of AutoCADR 14 or R2000, and load the "3dspiral.lsp" application software program with the AutoLISP command of tool; ③ Manual command input): 3dspiral (enter); (4) According to your own design intention, answer the six questions set by the software continuously, and then you can draw various ideal spirals: that is, draw the path of the spring. After running the 3dspiral command, the following six questions will appear one after another: 1. Central coordinates of the starting point of the spiral; 2. Initial radius value; 3. The number of turns of the spiral; 4. The pitch of the horizontal (HOR) direction of the spiral (cylindrical spiral is 0; Pagoda spiral has addition and subtraction points); 5. The pitch of the spiral changes along the VER direction; 6. The approximate number of rows per spiral (default is 30; The larger the value, the higher the approximation). Discussion: 1. The biggest feature of this software is its simple operation and easy to understand. 2. Spring bodies (whether cylindrical or pagoda-shaped) with circular sections of various sizes and shapes can be drawn; 3. To design a complete spring, it is necessary to continue to draw the tail buckle part of the spring (whether it is a compression spring or a tension spring); 4. It is not feasible to draw springs with non-circular sections (rectangular, prismatic and trapezoidal) by this method; 5. It is not feasible to draw the helicoids of common threads and trapezoidal threads in this way; 6. The shape of the ordinary spring drawn by this method is very realistic and accurate, especially after coloring and rendering, which can almost reach the point of "confusing the fake with the real" in the three-dimensional assembly drawing. However, we can't "extract" any useful plane elements (including various sections) from the three-dimensional spring, because the two-dimensional plan of various springs we are familiar with is a "simple drawing method" stipulated by the national standard of mechanical drawing; What's more, parametric drawing of springs is also an approximate method. {:em26}{:em26}{:em26} Follow-up: I can't open my address, benefactor! Can you be more careful? Thank you very much Answer: There are only two ways to try. The _Helix command in CAD2007 is a command to draw a three-dimensional spiral. Install 2007, the spiral is easy to draw. If you draw a cross section, such as a circle, and use the "scan" function, the spiral will survive immediately. ② The first method: load the Lisp program for drawing spiral lines; (t4x(L " ~ & amp； N)[7T7] The second method: draw with column coordinates and 3D polylines; Cad forum, cad design, PROE, autocad, cad download, CAD tutorial, CAD shortcut key, machinery forum, machinery design forum, machinery manufacturing forum, video tutorial, machinery CAD forum, construction machinery forum, UG, solidworks, font, printing, model space, installation, download, internship, examination, installation, training, engineer, machinery, drawing. ? 8R The third method: draw directly with the command of drawing spiral line that comes with AutoCAD (2007 edition only). ) y1j 2 [1a $ o6b (askcad.com) is the most professional and fastest-growing AutoCAD design and discussion base in China. The forum is full of experts, providing integrated solutions such as CAD tutorials, exercises, exams, software downloads, tutorial downloads and basic training. Pro/Engineer, Unigraphics, SolidWorks related forums. Our slogan: CAD design forum, to increase the motivation for engineers. Please remember our website: askcad.com. This is the spiral I drew in the second way. In order to better express the drawing process, I chose this 3D polyline to create a grip. Follow-up: How to load the Lisp program for drawing spiral lines? Answer: entities such as drawing lines and springs are often used in autoCAD, but there is no special command in autoCAD, so * * * enjoys the source program of this command for autoCAD users to use. Usage: Select Tools->; autoLISP-& gt； Loading the application will open the Load Application dialog box, select the saved helix.lsp file after downloading, click the Load button to load the policy into the application, and then click the Close button to close the dialog box. Execute the helix command. System prompt: Specify spiral base point: (enter spiral center coordinates) Please enter average spiral radius: (enter average spiral radius) Please enter pitch: (enter pitch, generally set to 2) Please enter the number of refinement segments per revolution: (enter the number of refinement segments per spiral, generally set to 72) Note: When drawing, sometimes the drawn spiral will be deformed due to the influence of other primitives in the drawing. At this time, you should temporarily turn off the object snap function or freeze other layers before drawing. Pay attention to the change of coordinate system after drawing. If the coordinate origin is not at this base point before drawing, the coordinate origin will move to the base point of the spiral after drawing. After drawing, the system will prompt: "Error: Function cancelled. "At this point, the drawing will not be affected. At this point, the last point of the spiral is still connected to the CAD cross, just press Esc or the space bar. Then draw a thread on this basis, and draw a triangle perpendicular to the tangent of the point with a three-dimensional broken line at the starting point of the thread. Then stretch the triangle along this spiral. Make the elongated figure into a rectangular array. Then use union to merge the graphics in the array. For example, draw a thread with the base point as the coordinate origin, with an average radius of 25 and a height of 16. The operation is as follows: (1) Execute the spiral command, and specify the base point (0,0,0), with an average radius of 25 and a pitch of 2. Draw a spiral. (2) Select the "3D Polyline" command, start from point (25,0,0), pass through points (@ 0,0, -2) and (@ 1, 0, 1), and draw a closed polyline. (3) select solid-> stretch to stretch the closed polyline drawn in the previous step along the spiral. (4) Select Drawing-> 3D Operation-> 3D Array, select a rectangular array, set the number of rows as 1, the number of columns as 1, the number of layers as 8, and specify the interval between layers as 2. And an eight-layer spiral pattern is obtained. (5) Use the "Union" command to merge the previous eight layers of threads, and then delete the spiral that began to be drawn. For drawing springs, the operation is similar, so I won't give an example. The difference is that it is only at the beginning of the spiral. Answer: I will record the problems I encounter, and then I will take out similar problems to solve. Is there a problem? brothers

Satisfied, please adopt.