The force ratio for the pressure angle may be expressed by using the kinematics of the mechanism. In a cam follower pair, the cam normally rotates while the follower may translate or oscillate. Emphasis can be placed on your specific creo proe mechanism interests. How can i get tutorials for mechanism design pdf in proengieer or creo. But now, with the development of the computer technique, our design can be done on the computer, and the simulation of the mechanism can be seen before the. Each mechanism is a sixbar linkage consisting of a slider, which is constrained. Part to machine in the beginning in this tutorial we will machine the monogrammed nd shown in figure 1. Creo not only protects your existing investment in these products, but provides a smooth path to the future. Ptc creo, formerly known as proengineer is a parametric, integrated 3d cadcamcae solution created by parametric technology corporation ptc. It has a curved or grooved surface which mates with a follower and imparts motions to it. The development platform consists of proe, protoolkit and vc6. A cam powered mechanism which uses two cam forms, a swing arm, and turret to drive an output shaft with a compound radial and axial movement. Convert all loadings to values referred to the bell crank lever, to simulate a simple oscillating mechanism. An operation is one specific setup of a machine tool for the manufacturing of a design.
Proassembly, proanimation and promechanism tutorial. The motion of cam usually rotation is transformed into follower oscillation, translation, or a combination of both. Proengineer projects mapped to us itea standards for. Cam mechanisms are often preferred by designers on account of their apparent simplicity. Design and simulation based on proe for a hydraulic lift. It is the mechanical portion of the machine that has the function of transferring motion and forces from a power source to an output. The offset e is negative if the follower is located below the x axis. The driver is called the cam and the driven member is called the follower. A cam mechanism with the basic curve like g in figure 67g will impart simple harmonic motion to the follower. Introduction of cams and types of cam and followers. The research on cad system of barrel indexing cam mechanism. This method uses continues trajectory conditions in.
You will model each component in part mode then assemble each using mechanism joints. Proengineer, cocreate and productview provide the foundational elements of the creo vision, delivering proven performance in 2d and 3d cad, cae, cam, caid and visualization. The parametric design and motion analysis about line. Gearcam mechanism of a variablediameter pulley duration. Cam profile characteristics such as pressure angle, velocity vectors, acceleration vectors. Cams supported include roller, grooved, worm, and conjugate. Suppose the cam mechanism will be used to make the knife edge oscillate. To improve the cam mechanism design, efficiency and quality of machining process, a directacting roller follower disk cam mechanism was designed and simulated based on proe. Cam mechanism a mechanism that usually consists of two moving parts a cam and tappet and a fixed part the support. Create a new assembly object file named nutcracker. Experimental and theoretical research of cams wearing of. The campbaucus bill provides no mechanism for congress to veto a. Mechanism design of palletizing robot based on translating.
The suite consists of apps, each delivering a distinct set of capabilities for a user role within product development. Considerable theoretical understanding is needed in order to get the best from a cam mechanism and avoid its premature failure. Cam mechanism is widely used as a common mechanism in automated or semiautomated machinery. List of mechanical cad softwares commercial and free. Cam mechanisms can be classified according to motion. Palletizing robot technology has been applied more and more extensively in logistics automation field. Mapkey hotkeys mass properties mechanism design option 1, 2, mechanism connections.
On the new dialog box, deselect the use default template option. Creo parametric tutorial pdf free download for mechanical creo is a family or suite of computeraided design cad apps supporting product design for discrete manufacturers and is developed by ptc. The course is a series of tutorials and emphasizes hands. Intuitively, we can also argue that the above mechanism is incentivecompatible because the utility of player idoes not depend on his or her own reported. Synthesis of cam mechanisms used for the exact design of cam profile for desired movement program of follower is presented.
The startup is complete when your screen looks like the following figure, which is a default proe screen. Method of recover of original cam profile by transfer function of velocity of follower of worn cam mechanism has been studied. We have defined transfer functions of velocity and acceleration, which indicate the wear of cams. Organizations that utilize the pro engineer wildfire computer aided design.
Cam and follower mechanism in engine theory of machines duration. The mechanism is meant for application in a forthandback mode ii operation of a tribotester rig. Cadcam plays a vital role in the field of mechanical engineering. Within this tutorial, do not use pro engineers default template. Within any operation, the minimum required setup includes a machine work cell and a machine coordinate system. Proengineer projects mapped to us itea standards for technological literacy 2002 grades 912 cam mechanism sports drink bottle wind sculpture rp car periscope co2 dragster estes rocket deodorant bottle water turbine wind turbine greenpower sterling engine slot car rally car suspension rtp flight marble roller coaster 0 rover 1 fundamentals rover 2 basic. Cam clutches are precision devices that lock the inner and outer races through the wedging action of cams to transmit torque in one direction of rotation while overrunning in the opposite direction of rotation. In order to do the analysis,the modelling of the product has to be made by means of a cad software and if any operation is to. Dynamics simulation of cam mechanism based on proe. Pro engineer will launch the operation setup dialog box. Computeraided design and simulation methods of cam mechanism were introduced, the. A familiar example is the camshaft of an automobile engine, where the cams drive the push. Build a cam mechanism create a simple machine that transfers a rotational motion into a linear vertical motion.
An electronic cam controls the slave axis in synchronization with the master axis, using pulse trains, according to a predefined electronic cam table. This product enables you to analyze your mechanism. The nutcracker model shown in figure 1292 will be utilized. Mechanism pro with mechanism pro, you can easily convert an assembly created in ptcs pro assembly into a complete mechanical system design by adding joints, forces, and motion generators. The mechanism is an assembly composed of three components. Mechanism tutorial within this tutorial, you will explore the assembly and animation capabilities of assembly modes mechanism option. Cams can provide unusual and irregular motions that may be impossible with the other types of mechanisms. These units are often referred to as freewheels, sprag, overrunning, backstop or oneway clutches, depending upon their application.
The architecture of indexing cam cad has been established and barrel indexing cam mechanism cad system is set up based on the architecture. This paper used proes datumgraph function, to create the followers displacement line graph, and to control cam profile by using the displacement line graph, the line translating tip follower cam mechanism was wholly parametric designed. Pdf synthesis of cam mechanism based on given program. Kindly share pdf of the book as well need help urgently. Pro e cam and follower mechanism with animated spring. As we already know that cad stands for computer aided design and cam stands for computer aided manufacturing. On the new file options dialog box, select the empty template file. It was the first to market with parametric, featurebased, associative solid modeling software. Cam software enables you to design the optimal tool paths to do this.
Promechanica is an integrated and also independent finite element analysis fea module of proe cadcam system. When the rotational direction of the cam is clockwise. Cam mechanism can get the expected movement law by means of higher pair touch drive follower. How to convert pdf to word without software duration. In the tutorial, we will create a four bar mechanism as shown in figure 1. Modeling based on proe in traditional design of the mechanism, after the force analysis the design of the mechanicaldrawing is a difficult work and will be spend most of the design time. A cam is a mechanical device used to transmit motion to a follower by direct contact. Once the mold is designed, its essential that the core and cavity of the mold, sliders, and cooling channels be machined efficiently with absolute precision. Cam can also be especially helpful in producing and designing molds for plastic parts. Cam mechanism is widely applied in industry because it can help achieve various complex motions of the follower via the cam contour design. But there are some limitations in the current singlearm palletizing robot that it cannot do effective work in the process of moving back to the takingend and the mechanical arm has so many freedoms that its control system is relatively complex.
Example of cam mechanism b a to change the vertical travel a or operation pattern, the cam b must be given additional machining or redesigned. Here is the list of cad softwares that are focused mainly on mechanical design and parametric modeling. Cam mechanisms are widely used because with them, different types of motion can be possible. These results define displacement of cam mechanisms of bending automatic press. The acceleration, as shown at i, is maximum at the initial position, zero at the midposition, and negative maximum at the final position. Tutorials for proengineer wildfire 2 stanford university. An arrangement in which a cam follower is positioned opposite each planar surface of the rectangular spline connecting the turret and output shaft acts to increase turret strength and reduces the size of the mechanism. The mechanism was dynamically simulated in proe to ascertain the dynamic loading status of integral parts. Virtual system design software, proe, was utilized to model the overall threedimensional structure of the step mechanism of the cam drive quadruped robot, as shown in figure 14. Indexing cam mechanisms, especially barrel indexing cam mechanisms, play an important role in modern mechanical engineering. Machines are mechanical devices used to accomplish work. The pressure angle is a function of cam rotation angle. Working from a menu of standard joint types, you connect parts with joints by selecting existing pro engineer data and geometry. A prototype camfollower mechanism was designed and assembled using proengineer proe software.
Cam mechanism article about cam mechanism by the free. Pro engineer is a featurebased, parametric solid modeling system with many extended design and manufacturing applications. Although majority of the mechanical cad market share is dominated by autodesk, ptc, dassault and siemens, there are many other small and medium scale cad packages which are very useful and economical for small industries. Cam and follower mechanism is preferred over a wide variety of internal combustion engines because due to the cam and follower it is possible to obtain an unlimited variety of motions. Getting started with proengineer wildfire is a tutorialbased introduction to creating parts, assemblies and drawings in proengineer. Mechanism design is used to define a mechanism, make it move, and analyze its motion.
1428 1494 383 1452 1446 290 656 712 1487 1048 1307 1150 109 71 1080 1426 1025 491 1098 546 1431 1192 344 1163 1032 563 234 271 684 1367 965 140 951 1029 532 175 852 1398 338 1277 506 748 745 222