1, axis correction question type (mechanical design is often tested and easily solved)

Learning method: correct the mistakes on axis 5~ 10, and you will find that there are always these kinds of mistakes. Just be familiar with them.

2, bearing life calculation (mechanical design foundation often test, easy to go wrong)

Learning method: this kind of problem can be done 3~6 times. The routine flow is: judge whether it is inside or outside, analyze the force, and finally calculate the formula (remembering one or two formulas is enough).

3, the degree of freedom calculation (mechanical principle of common questions, easy questions)

Learning method: First of all, we should be familiar with the calculation formula of degrees of freedom, know what a high pair and a low pair are, and know several common virtual constraints and local degrees of freedom (rotating pairs on wheels, compound hinges, parallel rods, etc.). ), let you basically master this question type.

4. Calculation of basic gear parameters (sending subproblem)

Learning method: just remember the formula of indexing circle, tooth root circle, tooth top circle, base circle and correct meshing.

5, gear transmission ratio calculation (simple)

Learning method: The Prime Minister knows the calculation formulas of fixed-axis gear train and epicyclic gear train, and will judge the direction of gear rotation. It is enough to know that a complex gear train is broken down into several simple gear trains.

Problem solving process: divide the basic gear trains, list the transmission ratio formula of the basic gear trains, find out the relationship between the basic gear trains, and finally solve them simultaneously.

6, bolt group calculation (at first, a little difficult)

Learning method: it is not difficult to analyze the stress of bolt group (only a few steps) and calculate with a set of formulas.

7, worm gear stress problem (this type of topic is not difficult, basically sub-topic)

Learning method: it is mainly to mark the strength and transmission direction, and it is enough to distinguish which hand uses which force. Secondly, to know the stress difference among gear transmission, worm gear transmission and bevel gear transmission, you can master it by doing 3~6 questions.

8. Drawing method of planar linkage mechanism (mechanism inversion method)

Learning method: Know the definition of pressure angle and transmission angle. Know the limit positions of various planar four-bar mechanisms. Knowing the calculation formula of the included angle of the limit position will be used when doing the problem.

9. Cam Mechanism Diagram (General)

Learning method: Know the name of cam mechanism, base circle, theoretical contour line, actual contour line, offset circle, pressure angle and stroke. Only do 3-6 questions.

10, motion analysis of planar mechanism (it's a little difficult to learn at first)

Learning method: master graphic method and analytical method. Do a few questions and you will know some routines.

1 1, bolt diagram (subtopic)

Learning method: just draw one by yourself, and the foundation of drawing class in freshman year should still be there.

12, fill-in-the-blank questions, multiple-choice questions, and true-false questions (more is enough)

Learning methods: These are fragmentary concepts, and you can almost know them by reading textbooks. Finally, do a few questions to familiarize yourself.

Summary:

Do five sets of real questions in the target colleges, and you will basically master the answers to the questions in the target colleges. You must study the real problem.