That screw is called a auger, it is also named the ARCHIMEDES SCREW. Modified by RandyKimball at Tue, Mar 02, 2004, 20:26:08 The worst suggestion of your lifetime may be the catalyst to the grandest idea of the century, never let suggestions go unsaid nor fail to listen to them. After the adaptor is developed in cardboard it is a simple matter to transfer it to CAD for future reference or manufacturing. I often use this method to develop an adaptor such as for hydraulic clutch linkages on street rods. You can then either share the formula or keep it as an in-house knowledge base. In this case I'm thinking by developing a few different configurations in this method you will soon spot the pattern and likely the best formula. You can evolve through several pieces of cardboard shapes quickly and cheaply to effectivly devise a shape to fit most any situation. Sometimes the quickest and most effective engineering is what I call reverse engineering, one of the best reverse engineering tricks I know is the good old cardboard and pocket knife method.
HOW TO DRAW SPIRAL AUTOCAD 2005 HOW TO
: Re: How to calculate the flat form of a flight of screw conveyor - Pat_Couture That's why I would like to know if anybody can give me a clue about this. The problem that I have is that I have to do 3 to 4 test of different dimension before I can find the exact radius for my donut to give me the pitch I desire. Hi Randy, yeah it's exactly what I'm talking about, as you said we can do it in section, for example my screw conveyor has a 9" outside diameter around a tube of 2 1/2 sch 40 with a 9" pitch, we use to cut many item of a circular shape (who looks like a donut) of approximately one pitch each in a sheet metal then we weld them together after that, we stretch it with the tube inside until the inside is near enough of the tube. : Re: How to calculate the flat form of a flight of screw conveyor - HAG : Re: How to calculate the flat form of a flight of screw conveyor Modified by Administrator at Sat, Dec 16, 2006, 08:01:28 I will Email an Excell Sheet I use to calc. and special size rolled helicoid flighting. Hold one end with hammering tongs, hang the other end over anvil edge and hammer out flights.įalcon Company also sells std. If you just need a few flight and want to make them just to make them, "OLD SCHOOL" way,not so long after ARCHIMEDES wood screws, black smiths would take a disk and heat it red to yellow hot. If they do not pitch out correct, increase or decrease the I.D. The press operator measures the pitch and O.D. I.D.Īfter cleaning slag and rust from blanks, have each formed to slip fit over pipe.
HOW TO DRAW SPIRAL AUTOCAD 2005 TRIAL
On a new flight size I always run (2) trial blanks across the cutting table using std. Wear on the die head and press setings also play a part. stainless steel will change flight pitch as much as 1". The formulas listed in other replies will give you the blank size "on paper", but the reality of making flightings is lots of trials. Most are single hit using a set of pie shaped dies to form the sectional flights. If you are looking setup to manufacture screws, you will need a flight press. Stretch from other end with a come along or hyd. Slide flight coil over pipe and tack weld one end. 304SS and mild steel are readily avalible at low prices. (if (not (member "geom3d.arx" (arx))) 1).Perhaps perchasing helicoid flighting for standard size screwsįlighting is avalible in 6",9",10",12"14",16" dia. (setq rads (getdist "\nENTER RADIUS OF WIRE: ")) 3). (setq len (getdist "\nENTER LENGTH OF SPRING: ")) 3 (setq pit (getreal "\nENTER NEW PITCH: ")) 3 (setq rad (getdist "\nENTER NEW RADIUS: ")) 3 (setq seg 36) in one circle become 36 part (defun c:ccs (/ *error* om lay seg ang cnt rad pit len leng x y z point el p1 (setq pb (subst (append '(10) vertex) (assoc 10 pb) pb))Ĭode: ccs is stand for Create Coil Spring (setq vertex (list (+ (car c) (* r (cos Beta))) (defun C:h3(/ c r p n nr ps pb pe Beta dBeta z dz vertex )
To create 3d helical models with non-circular sections, you have to use the Autodesk Mechanical Desktop or some other parametric modeling applications. If you use the created 3dpoliline as an extrusion path, it will rotate the section around the path. of steps in each revolution to create a 3d helix.
It requests you the center, radius, pitche, no. The following autolisp program adds a coomand named "H3" to drawing session.