Mechanical cam pdf

Visit our website k12maker. Reply 11 days ago. Sorry you're having a hard time accessing this project. If that's the case, we will work on updating our older instructables so the images are all hosted on instructables instead. Thanks for letting us know! Reply 1 year ago. Looks liek the name got changed. I will update the Instructable. Have fun with your project! Question 1 year ago. Introduction: Mechanical Cam Toys.

More by the author:. Tinkercad Projects ». Essential Question s How can creating metaphors be used to increase understanding and enhance communication skills? Context Creating physical objects can be an engaging and useful way for students to process their learning. Possible motion types are: Up-down Spin Side-to-side Includes 1 static object that is a background, piece of scenery, or other objects. The motions and scenery must represent concepts related to the specified topic.

Constraints: The 2 motions must be different. The same type of motion can be used twice if the 2 motions differ either in frequency or magnitude. For spinning, 1 can spin at a faster speed than the other. The appearance and motions of the characters and objects must communicate the intended concept. Research: Review the motions and mechanisms that are easily implemented in the Cam Toy.

Collect: Have students document their research on the automata, noting mechanisms and features that they found interesting or may be relevant to their topic.

Design: Students work together to brainstorm ideas on how to represent the topic they are assigned using the mechanical motions commonly done in automata. The House has members as opposed to in the Senate The length of term in the House is 2 years, while the Senate term is 6 years. The Senate has the power to confirm judges, Cabinet members etc, while the House does not. Example projects for Earth Science: Hurricanes. List the motions you expect to create and draw the appropriate cams.

The reason is the electronic devices divert your attention and also cause strains while reading eBooks. Subramanyam detailed in the below table…. Step-1 : Read the Book Name and author Name thoroughly. These project list is about mini projects , Major Projects , simple , Low Cost , Low budget ,innovative projects ideas. CAD is the use of computer technology for design and design documentation.

CAM software uses the models and assemblies created in CAD software to generate tool paths that drive the machines that turn the designs into physical parts. Currently, he is working in the sheet metal industry as a designer. Additionally, he has interested in Product Design, Animation, and Project design. He also likes to write articles related to the mechanical engineering field and tries to motivate other mechanical engineering students by his innovative project ideas, design, models and videos.

Rise is the motion of the follower away from the cam center, dwell is the motion during which the follower is at rest; and return is the motion of the follower toward the cam center. There are many follower motions that can be used for the rises and the returns. In this chapter, we describe a number of basic curves. Figure Motion events Notation : The rotary angle of the cam, measured from the beginning of the motion event; : The range of the rotary angle corresponding to the motion event; h : The stoke of the motion event of the follower; S : Displacement of the follower; V : Velocity of the follower; A : Acceleration of the follower.

The acceleration, except at the end of the stroke would be zero, as shown in c. The diagrams show abrupt changes of velocity, which result in large forces at the beginning and the end of the stroke. These forces are undesirable, especially when the cam rotates at high velocity.

The constant velocity motion is therefore only of theoretical interest. As indicated in e, the velocity increases at a uniform rate during the first half of the motion and decreases at a uniform rate during the second half of the motion. The acceleration is constant and positive throughout the first half of the motion, as shown in f, and is constant and negative throughout the second half.

This type of motion gives the follower the smallest value of maximum acceleration along the path of motion. In high-speed machinery this is particularly important because of the forces that are required to produce the accelerations. When , The velocity diagram at h indicates smooth action. The acceleration, as shown at i, is maximum at the initial position, zero at the mid-position, and negative maximum at the final position.

A designer can define the function according to the specific requirements in the design. The motion requirements, listed below, are commonly used in cam profile design. We assume that the cam mechanism will be used to realize the displacement relationship between the rotation of the cam and the translation of the follower. Figure A Skeleton Diagram of disk cam with knife-edge translation Below is a list of the essential parameters for the evaluation of these types of cam mechanisms.

However, these parameters are adequate only to define a knife-edge follower and a translating follower cam mechanism. Parameters: r o : The radius of the base circle ; e : The offset of the follower from the rotary center of the cam. Notice: it could be negative. IW : A parameter whose absolute value is 1. It represents the turning direction of the cam. Cam profile design principle: The method termed inversion is commonly used in cam profile design.

For example, in a disk cam with translating follower mechanism, the follower translates when the cam turns. This means that the relative motion between them is a combination of a relative turning motion and a relative translating motion. Without changing this feature of their relative motion, imagine that the cam remains fixed. Now the follower performs both the relative turning and translating motions.

We have inverted the mechanism. Furthermore, imagine that the knife-edge of the follower moves along the fixed cam profile in the inverted mechanism. In other words, the knife edge of the follower draws the profile of the cam.