Cam lobe design software

In addition to lift data for all of the cam lobes, lobe tip angles are also measured and referenced to a feature pin or keyway as a zero degree point. Hi fellas, how would i go about designing a cam lobe. The duration determines how long the valves will stay open. Now we have an ideal cam lobe design, based on which we could actually machine the cam. Understanding camshafts camshaft basics camshaft design. Lobe lift sometimes called cam rise is the height of the eccentric portion of the cam lobe above the base circle. If a hydraulic cam is being replaced with a solid cam, the 0. Mechanically speaking, the camshaft is linked to the crankshaft and turns 12 the speed of the crank. Allnew lobeprofile library of comp cams latest profiles.

The primary use for this program is to generate cam lobe designs that do not have inverse. With thousands of active lobes in the comp library, the combinations are infinite for any given engine. The closer the lobe centreline the harder the engine will come on the cam. Hertzian contact stress, spring harmonics, maximum follower wear path length, component mass and flex, and cam drive. Custom camshaft design engineering andrews products. Andrews products is a one stop shop for camshaft design, software and. He gave me a copy of the code in fortran altogether it was less than 1,000 lines. Each cam profile design is exclusive to the original customer and. I will copy an existing lobe from a cam in the garage. The cam secret myth these claims are some of the easiest to deflate. Determining the specific point that the lobe begins to move, the lifter off of the base. Nov 01, 2009 lobe design thanks to modern cam design software, lobe profiles are more advanced than ever. In a third run, the camshaft axis was offset for additional 2 mm. Camshaft lobes are designed by starting with the lift curve, and working backwards to determine the lobe shape that will produce the lift curve.

Training video accompanies chapter introduction to the design accelerator in the autodesk inventor 2014. Design of lobe pair profile of an external rotary lobe pump tanuja p. Comp cams leads the industry in camshaft lobe offerings. If clearance in the drawingwhich depicts the westbury kittywake exhaust camwere reduced to the required 0. Lobe automatically builds you a custom deep learning model and begins training. Mar 22, 2007 the science behind camshaft design is as advanced as anything in a race car, so most of usincluding experienced engine buildersdepend on the manufacturer to help spec the right cam for a. Adding the lobeprofile library cd, dynomation6 and dynosim6 users can model valve motion and engine output with unprecedented accuracy using the entire comp cam lineup. An interactive camshaft calculator where engine builders can see how valve overlap and boost efficiency is affected by a camshafts physical design. Camshaft lobe design tilden technologies camshaft design. Looking at this diagram, the lift determines how far the valves will open.

Norton, design of machinery introduction to cam design. Try this guy he is real knowledgeable about cam design i dont want to bother anyone off list. Camshaft technology andrews products is a one stop shop for camshaft design, software and related technical training to support your complete development process from basic designs to finished parts. This is the actual designing process of the cam lobe. Cam inspections include bearing journal diameter measurements and overall shaft straightness. We would normally recommend that you use specialist software for the design of engine camshaft because there are special requirements for valve timing cams. This helps to give the engine the correct balance inlet to exhaust. The rocker arm transfers the motion of the valve lifter riding on the cam lobe to the valve and increases the lobe lift by the amount of the rocker ratio, which is typically 1. As the cam turns, the eccentricshaped cam lobe lifts and lowers a cam follower, or lifter. In fact the software allows, to design valve lift law, to calculate cam profile for the main type of valve train system, to verify the valve train system with the spring load calculus and also to analyze the geometry of combustion chamber. Calculating cam profile, cam lobe design, optimizing cam. Lobe design thanks to modern cam design software, lobe profiles are more advanced than ever. Start by dragging in a folder of training examples from your desktop.

Constant velocity figure 23 the s v a j diagrams of a bad cam designpure constant velocity h 0 s v 0 0 90 180 270 360 a 0 j 0. Nzxt cam empowers you to see what your computer is doing, from processor load to bandwidth consumption. It will take minimum of 1520 minutes to model a cam lobe. To generate the best profiles available, we have developed our own cam design software to tackle any design constraint of. Cam profile designs are furnished with the lift and design data along with. Hopefully, you have read all of the posts so far, and have a good understanding about cam profile designs. While mechdesigner software is particularly suited to packaging machine design, it can also be used to design camshafts for engines. The images shown are not, in any way, proportional to the actual camshaft lobes. All camshaft measurements filter out shaft eccentricity before lobes are measured. Hertzian contact stress, spring harmonics, maximum follower wear path length, component mass and flex, and cam drive feed back are examples of just a few of the constraints. My question is about keeping the old cam for future use in a daily driver or a cruiser.

Before, we had to make everything on the lobe faster, he tells us. Cam designs often use conjugate cams for improved performance. Dynomation6 engine simulation motion software, inc. Our camshaft design programs allow end users to examine multiple designs in a. Finding the right camshaft chevy high performance magazine. Cam designs made with andrews cam programs work, period. Our analysis program can export a finished cam lobe design formatted for cnc cam lobe grinders, lobe milling machines and automated inspection equipment. When shopping for camshafts from different manufacturers, enter each of their supplied cam card specs into mgis camshaft calculator. If there are more lobes in an engine say 20, then modeling all these lobes will take at least 34 hours and modeler should be very much familiar with cad software.

Remarkably, the cam lobe shown in picture 3 generates the same valve lift curve as the extremely pointed cam lobe in picture 2. With software, we can design a ramp with six or seven sections, observes jamora. Comp cams performance camshafts, lifters, valve springs. The lift curve for this particular cam shows a velocity of 0. Softengine engine simulation software cams software. Design of lobe pair profile of an external rotary lobe pump.

In fact the software allows, to design valve lift law, to calculate cam profile for the main type of valve train system, to verify the valve train system with the spring load calculus and also to analyze the geometry of. Cam designs often use conjugate cams for improved performance while mechdesigner software is particularly suited to packaging machine design, it can also be used to design camshafts for engines. The points and lines are created from a dxf file exported by the cam design software. The translational or rotational displacement of the follower is a function of the rotary angle of the cam. He had just previously written the cam design software used by chrysler to design cams for the 1960s b engines wedge and hemi, he also designed the race hemi heads etc. The drawing at the right shows a cam lobe and lifter at 45 cam degrees. Whether were talking about axle ratios, compression, carburetor size, timing, or e. With an ezcam gage, you can inspect one single lobe, two lobes intake and exhaust or an entire camshaft. Lobe is an easytouse visual tool that lets you build custom deep learning models, quickly train them, and ship them directly in your app without writing any code. Special software can also be applied to create a dwelled maximum velocity dmv profile when necessary on some designs. Its greek jargon, or street parlance to the rest of the world, but it often defines us.

Most of the information in this blog section describes what is involved in designing a cam profile. To generate the best profiles available, we have developed our own cam design software to tackle any design constraint of modern times. Professional cam and perfect cam is the ideal and complete software for engineering, team, tuner, etc. The new lapsim engine module, which works with lapsim v. Like most lobes, i want to turn rotational movement into linear. Camshaft math to design competitive performance engines.

Cam manufacturers now have the flexibility to integrate three to four different cam event sections onto. Ive tried to look up some diagrams, but im not sure on how to get the needed dimensions. Cam design and analysis programs camshaft calculations. Ezcam details and software velocity jerk base circle. Instead, tables of follower lift vales with corresponding cam angles are provided in design documentation and engineering drawings. Dec 01, 2012 depending on the design of course i think you could draw and design a simple cam lobe with a roller follower that has an eyelet on the end for the wire. The first step of the verification process is the creation of a design file that can be sent to the cnc grinder to create the cam lobe profile. Our 911 gages are operated in a temperature and hunidity controlled inspection room and are periodically calibrated by adcole. In fact the software allows, to design valve lift law, to calculate cam profile for the main type of valve train system, to verify the valve train. Cam design history tilden technologies camshaft design. Our opticam software uses this design method with a choice of either cubic. For this reason, we need to learn a bit more about lift curves before we can discuss how lobes are designed. The motion requirements, listed below, are commonly used in cam profile design. Without a design file, we would not be able to compare the finished manufactured camshaft to the required design specifications.

The lift of a given cam lobe will be extended by 10% a percental increase of the valve lifting curve. Very seldom are these formulae shared for the use of manufacturing. Camshaft basics from the february, 2009 issue of chevy high performance by bob mehlhoff. Flat tappet with design cam shown inside the old cam with larger basecircle. Camshaft lobes are designed by starting with the lift curve, and working backwards to. What interests me is after the cam designer know what engine he is working on the bore, stroke, rod length, rpm range, intended usage, head flow every. How to model a circular cam lobe autodesk community. May 03, 2014 how to create a disc cam using autodesk inventor. May 21, 2010 the data i need to model will be 360 rows long angular increment and consist of two columns of data angle and radius.

Post1912 model t camshaft lobe and lifter, 45 degrees before maximum lift. A designer can define the function according to the specific requirements in the design. This represents a 37% reduction from the design figure. Jan 24, 2015 lobe lift sometimes called cam rise is the height of the eccentric portion of the cam lobe above the base circle. Professional cam and perfect cam software to design the. Rotors used in lobe pumps are conjugate generated pair, generated from their respective pitch pairs. We would normally recommend that you use specialist software for the design of engine camshaft because there are special requirements for valve timing. Full screen graphic capability makes it easy to visualize and analyze cam design data for a wide variety of camshaft applications. Camshaft duration is the amount of crankshaft rotation that occurs as the cam lobe moves the lifter off of the base circle. The rotary table is then turned until the correct amount is cut from the blank, leaving the proper duration for the lobe.

The later cam was dual pattern with a less aggressive exhaust lobe that had a few degrees more duration and the same lift. The science behind camshaft design is as advanced as anything in a race car, so most of usincluding experienced engine buildersdepend on the manufacturer to help spec the right cam for a. This is not cam design by any stretch of the imagination, yet many cam grinders unfortunately still use morphing to develop new profiles. Professional cam and perfect cam software to design the cams. For a fee you could get someone like harvey crane at cranecamdesign to design a profile.

It is highly recommended that for the best results, the flow figures for the cylinder heads are used. Nzxt cam is fast, efficient, and easytouse, allowing you to control every aspect of your computer. These cam profiles are designed with an adequate nose radius and edge margin to promote longevity and prevent premature wear. Manage performance, temperatures, and devices all from a single application.

I will copy an existing lobe from a cam in the garage first. Development of an interactive camshaft design tool. After the cam is machined, the edges of the lobe are filed by hand until smooth and rounded, as seen below. It also lets you know what applications are making use of every. Cam lobe design cam lobe design stevehuck electrical op 10 aug 08 08. Joshi3 abstract noncircular lobe rotor pair profile generation is complex and new form of external rotary lobe pump used in industry. The cam design page describes this method and shows the 194950 mercury 8cm cam as an example. Cam design cat cams has a large database of cam designs available, ready for grinding to suit your custom project. Cam design software is fully integrated into mechdesigner you can model then let mechdesigner calculate the cam coordinates of just about every cam type, including. Our analysis program can export a finished cam lobe design formatted for cnc cam lobe grinders, lobe milling machines and automated inspection equipment including landis, phillips, adcole and others. I believe david went to harvey cranes cam school and has had harveys cam lobe design software.

Isky racing camshaft design secrets chevy high performance. The cam can be a simple tooth, as is used to deliver pulses of power to a steam hammer. Camshafts are crucial components in combustion engines. Ivan tighe engineering use wider lobe centrelines on speedway application, for this reason. Our camshaft design programs allow end users to examine multiple designs in a short period of time, minutes. Oliver, ih, international harverster, john deere, case. Dynomation6 lobe profile library motion software, inc. However, if you have particular needs, we do offer inhouse cam design for the most demanding applications.

Mar 28, 2007 with software, we can design a ramp with six or seven sections, observes jamora. Follower lift for cam lobe profiles is often generated from a variety of standard and complex formulae. Marketing campaigns often assert that a focus on a single one of the aforementioned lobe characteristics i. The shape of the cam lobe from the open ramp to the close ramp, determines how fast a valve will open and close. Ingram engineering cam profile designs is a custom cam profile design service for camshaft grinders, engine builders, and anyone needing a specific cam profile design.

For cam design, not only is the lift curve important, but also several. The rocker arm directs the motion of the cam lobe to the valve, lifting the valve open. The lifter is linked to a fulcrum, or rocker arm by a pushrod. A cam is a rotating or sliding piece in a mechanical linkage used especially in transforming rotary motion into linear motion. Stan that wasnt really a complete cam design software. Zoomed in on the top of the accelleration curve, shows the difference in 1 and 0. In the 1940s ford abandoned cams designed from arcs and started using the triple curve design method. The drawing on the left shows the design and associated terms of a typical camshaft lobe. This is incorrect for several reasons, and will have disatrous results on the valve gear under stress. Laurelroof cam a design with the basic specifications of the laurelroof antique performance cam 3. I created a spline that intersects the points and extruded the cam lobe. It idled nice, and had a nice sound to it, but are the 70s lobe design good for anything.