Today, we are going to discuss the "Explanation of terms necessary for designing mechanisms, such as cam geometry, mechanism, motion, curves, etc.Here is a note about "TheHere is a brief summary of the meaning of "common" terms for studying cam mechanisms. A table of contents has been created to make it easier to read. Please use it.
Cam shape (cam profile)
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Cam Diameter
Cam O.D.
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Cam base circle radius
The radius of the circle that serves as the reference for the cam shape, generally considered to be the minimum radius of the cam profile.
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Cam representative radius (Cam effective radius)
The representative radius of a cam is generally halfway between the maximum and minimum radii of the cam
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Cam contact width
Length of line in contact with contactor
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circumscribed cam
A type of cam in which contact is made between the shaft center of the cam and the shaft center of the follower (between straight lines). (General Cam)
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Inscribed cam
A type of cam in which contact with the cam is made outside the width of the line connecting the axial center of the cam and the axial center of the follower, as in an inscribed parallel cam.
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Constraint cams (sure-footed cams, conjugate cams)
Cam followers restrained by the cam from both directions to prevent them from separating from the cam (e.g., groove cams in high-precision, high-speed applications)
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Radius of curvature of cam
The curvature of a curve at any point expressed as a value of the radius of the equivalent circle
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Center of curvature of cam
The center of the radius of curvature.
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Cam curvature
The reciprocal of the radius of curvature.
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flat-topped node
Mechanism in which the tip shape of the follower is flat, like the contactor of a flat plate cam
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acromial tubercle
Knife-edged, pointed end contacts cam surface. Easily worn.
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normal vector
A line perpendicular to a tangent line at a point of contact.
Cam section or mechanism
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Original Clause (Original Motion Clause)
An element that gives motion to a subordinate node. The cam is called the original node.
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Subordinate clause (subordinate clause)
A mating element that is in direct contact with the cam and is a generic term for a section on the output side of the mechanism.
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direct obedience
A cam-followed mechanism, driven by a cam, used to obtain a linear displacement
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swinging follower
A cam-followed node mechanism, driven by a cam and used to obtain a reciprocating angular displacement.
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contact
Mechanical elements in direct contact with cam contours, such as cam followers and roller followers
Cam motions
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sedentary
Degree of Stopping
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one-way stop motion
Movement with a stop only "on one side" either at the beginning or at the end
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bipolar motion
Movement with a stop either at the beginning or at the end
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uninterrupted (unaided) movement
Beginning of driving andin the endstopwithout,Arbitraryaccelerationas it is (i.e. now)consecutiveas (a group, etc.)reciprocating motionをreelreturn (something)after an inflectable word, creates a noun phrase indicating something the speaker does not feel close to
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overlap
To start the next operation before one is finished to shorten the cycle of a machine. Or the state of doing
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Cam facing rotation
Direction of rotation of the cam from the roller side to the fulcrum at the oscillating node
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Cam runaway rotation
Direction of rotation of the cam from the fulcrum to the roller at the swing follower.
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Roller center locus
Trajectory of the center of the roller when the cam is fixed and the follower side is rotated around the cam shaft.
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Cam indexing accuracy (positioning error)
The difference between the theoretical value and the measured value of the displacement of a follower section in one indexing cycle of the intermittent indexing device.
Cam torque
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Cam Shaft Torque
Torque acting on cam shaft
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Preload
The higher the pressurization, the higher the accuracy and rigidity, but also the higher the frictional force (rotational torque).
Cam angle
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Pressure angle
Angle of the common normal direction of the cam and the node to the direction of motion of the node
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layout angle
Angle of rotation of cam required to index a follower once
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stoplight
Rotation angle of the input shaft in the section where the output shaft is stationary
Cam Curve (Cam Motion Curve)
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What is a cam curve (motion curve)?
The "final output end action" when the node is moved by the cam is expressed as a function of time or input variables, and the cam curve is the motion curve of the node created by the cam motion
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monostatic curve
Motion curve with acceleration pattern of constant velocity circular motion uniaxial component
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Symmetric Cam Curve
A cam curve with the same characteristics in forward and reverse rotation, this cam curve has symmetry in the pattern of acceleration
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asymmetric curve
Cam curves with no symmetry in the pattern of acceleration
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discontinuity curve
Curves where speed and acceleration are not continuous in the section including the start and end points
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Modified sine curve (standard cam curve)
Widely used for small maximum speed, small cam shaft torque coefficient, and small acceleration.
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transformational trapezoidal curve
Standard cam curve with small maximum acceleration. High speed and light load applications
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deformation constant-velocity curve
A cam curve with a constant velocity section in the middle of the curve.
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Universal curve (universal cam curve)
Define a cam curve divided into seven intervals and handle the time distribution of each interval with parameters in a generic cam curve of trigonometric system continuously sustained up to acceleration.
That's it.