BR-TLC precision cam profile measurement experimental platform
1、 Overview of the experimental platform:
In modern teaching of Mechanical Principles, there is an increasing emphasis on combining theory with practice, cultivating students' hands-on ability and innovative consciousness, and cultivating their flexible application ability in modern virtual design and testing methods. Cam mechanisms are not only commonly used mechanisms in machinery, but with the development of modern industry, mechanical automation and semi automation are becoming increasingly popular. In order to achieve the above teaching objectives and expand students' innovative thinking, our company has developed a precision cam profile measurement and simulation design experimental platform.
This system adopts a stepper motor drive to accurately measure the true motion trajectory and displacement of the cam at each angle. Through the computer, the true contour of the cam can be accurately drawn, which facilitates the interaction between experimental teaching and scientific research.
1. By using computers to collect and process the dynamic parameters of the cam mechanism, the measured dynamic parameter curves are obtained, and the motion of the mechanism is simulated using a computer to obtain the corresponding dynamic parameter curves, thus achieving a close integration of theory and practice.
2. Using computers to optimize the structural parameters of the cam mechanism, and then simulating and testing the motion of the cam mechanism through computers, effectively combining computer-aided design with computer simulation and testing analysis, and cultivating students' innovative consciousness.
3. By utilizing the human-computer interaction performance of computers, students can independently conduct experiments and cultivate their hands-on abilities under the guidance of software interface documentation.
2、 Experimental purpose:
1) Understand the motion of disc cam and cylindrical cam;
2) Understand the motion of different disc-shaped camshafts through actual measurement and software simulation;
3) Understand the testing methods for cam profiles;
4) Compare and analyze the reasons for the differences between the measured and theoretical simulation curves;
5) Combining computer simulation and testing to cultivate students' practical and innovative abilities.
3、 Main technical parameters of the experimental platform:
1. 57BYG250FB stepper motor:
2. Disc cam (eight motion patterns): base circle radius r=40mm, lift h=15mm
3. Outer diameter of cylindrical cam φ＝ 100mm pitch diameter φ D=84mm, lift h=35mm
4. Synchronous belt: Z1=20, Z2=72, reduction ratio i=3.6
4、 Experimental content:
1. Measurement of the true contour line of the disc cam and measurement of the cam motion curve;
2. Measurement of cylindrical cam profile and motion curve;
3. Computer software simulation of cam theoretical motion curve;
5、 Main technical parameters of the cam:
1. Main technical parameters of disc cam mechanism:
Cam # 1: Constant velocity motion pattern
Push distance h=15mm
Return h=15mm
Cam base circle radius r=40mm
Push motion angle φ＝ 150 °
Far angle of repose φ＝ 60 °
Return motion angle φ＝ 150 °
Cam # 2: Constant velocity motion pattern
Push distance h=15mm
Return h=15mm
Cam base circle radius r=40mm
Push motion angle φ＝ 180 °
Return motion angle φ＝ 180 °
Cam # 3: Sinusoidal acceleration motion law
Push distance h=15mm
Return h=15mm
Cam base circle radius r=40mm
Push motion angle φ＝ 180 °
Return motion angle φ＝ 180 °
Cam # 4: cosine acceleration motion law
Push distance h=15mm
Return h=15mm
Cam base circle radius r=40mm
Push motion angle φ＝ 180 °
Return motion angle φ＝ one hundred and eighty
Cam # 5: Polynomial acceleration motion law of 3-4 to 5
Push distance h=15mm
Return h=15mm
Cam base circle radius r=40mm
Push motion angle φ＝ 150 °
Near angle of rest φ＝ 30 °
Return motion angle φ＝ 150 °
Far angle of repose φ＝ 30 °
Cam # 6: Improving the law of constant velocity motion
Push distance h=15mm
Return h=15mm
Cam base circle radius r=40mm
Push motion angle φ＝ 150 °
Near angle of rest φ＝ 30 °
Return motion angle φ＝ 150 °
Far angle of repose φ＝ 30 °
Cam # 7: Improving the sine motion law
Push distance h=15mm
Return h=15mm
Cam base circle radius r=40mm
Push motion angle φ＝ 150 °
Near angle of rest φ＝ 60 °
Return motion angle φ＝ 150 °
Cam # 8: Improving the trapezoidal motion law
Push distance h=15mm
Return h=15mm
Cam base circle radius r=40mm
Push motion angle φ＝ 180 °
Return motion angle φ＝ 180 °
2. Cylindrical cam motion parameters: (constant velocity motion law)
Lead 35mm
Lead angle 15 °
Cam outer diameter φ＝ 100mm
Middle diameter φ D=84mm
3. Driven pointed push rod with pointed tip: stroke l=50mm

Configuration list of precision cam experimental platform