Mechanical principle: ?  of hoarse of correct goody  ?

By a certain number of rigid link is passed low deputy (turn deputy ﹑ moves deputy) connection, and the orgnaization with the parallel each other of athletic plane homogeneous phase that is nodded each on each component (graph) of give typical examples of 1 planar linkage mechanism, calls plane low deputy orgnaization again. Low deputy have small ﹑ of intensity of pressure to wear away light ﹑ Yi Wujia is versed in and geometrical appearance can assure itself to close wait for an advantage, planar linkage mechanism uses reason extensively to be mixed at all sorts of machinery in the instrument. Compare with photograph of tall deputy orgnaization. It hard expects movement now really. Design calculation is complex. The most commonly used in planar linkage mechanism is four-bar mechanism. Its component part amount is least, and and can change campaign. The planar linkage mechanism of much Wu Sigan calls much lever the orgnaization. It can achieve a few complex exercise. But lever is much and stability is poor. The drive axis of machine of motivation of brace existence condition makes week of roll commonly. The brace that circles frame to make weeks of whole roll because of be being answered to be by the driving link of drive in this orgnaization is in the kinematic chain that forms hinge four-bar mechanism. D of ﹑ of C of ﹑ of A ﹑ B represents each lever length already is the symbol of each lever. Should satisfy the Wu Ji such as small Wu Huo of the shortest lever and the sum of the seniorest staff when the sum of his two lever length, if the will shortest lever or its adjacent lever are secured firstly, criterion another lever is brace namely. Answer number urgently to wait for driven of fast motion ﹑ in brace in the linkage mechanism that gearshift moves, requirement driven can return quickly, in order to improve efficiency. Namely K is called return number urgently. If pressure angle pursues the brace rocker orgnaization in 2a hinge four-bar mechanism, if not plan the force of the attrition force of kinematic pair and component, criterion the force P that brace A passes action of connecting rod B to go up at rocker C, with its action nods the included angle between the speed of B to call the pressure angle of rocker. Pressure angle is bigger. P is jumped over in significant component of force of direction small. Transmission is more difficult also. The Zuo horn of pressure angle calls transmission part. Its should be restricted when the orgnaization is designed the biggest pressure angle or role of the least drive. Dead center is in brace rocker orgnaization, if and is driving link with rocker, be in when brace and connecting rod at one linear position when, the force that connecting rod sends brace cannot lays the moment of force that makes brace Zuo turns. Orgnaization of as a result cannot start. This position calls dead center. The orgnaization should keep away from when start dead center position, and often uses in athletic process inertial will transfer dead center. Main type four-bar mechanism has four-bar mechanism two kinds of main types. Below the premise that exists in contented brace, hinge four-bar mechanism takes different component to make frame, attainable the ﹕ of hinge four-bar mechanism that and has different motion character for example brace rocker orgnaization, double-crank orgnaization and the parallelogram orgnaization that by them derive comes out, orgnaization of brace slide block. In hinge four-bar mechanism, if A is the shortest lever, D extractions staff or lever B are frame. Criterion A is brace. C is rocker, and gets brace rocker orgnaization namely () of orgnaization of rocker of brace of A of four-bar mechanism of graph 2a hinge. If take A to be frame, criterion B and D are brace, get double-crank orgnaization namely () of orgnaization of double-crank of B of four-bar mechanism of graph 2b hinge. Below the premise that exists in not contented brace, the kinematic chain of hinge four-bar mechanism no matter which lever is fixed, because does not have brace to exist, it is double rocker orgnaization surely. Pursue for example orgnaization of double rocker of C of 2c hinge four-bar mechanism, take C to be frame. B and D are rocker. If increase the rocker length of brace rocker orgnaization to infinity, translate into of rotational deputy O is mobile deputy, gets orgnaization of brace slide block namely () of orgnaization of slide block of brace of D of four-bar mechanism of graph 2d hinge. In addition the double-slider orgnaization that four-bar mechanism still takes type of two slide block () of orgnaization of double-slider of E of four-bar mechanism of graph 2e hinge. Dimension is pressed integratedly given driven the dimension that campaign will come decide orgnaization kinematic diagram. Integrated vogue should consider the condition such as role of the least drive and brace existence, and gets reasonable and reliable orgnaization in order to assure. To driven athletic requirement is varied, wants integrated issue also each are not identical. General but when it is certain that end is motion curve of ﹕ driving link, requirement driven can come true given the connecting rod of requirement of motion curve ﹔ that corresponding position or approximate implementation give function can come true given some bit of can approximate edge on connecting rod of positional ﹔ requirement gives curvilinear campaign. It is the main problem that studies athletic geometry among them, also can beg solution to realize the orgnaization that gives a curve approximately accordingly. The main method with comprehensive measure has diagram method of analytic law ﹑ and experimental way. Analytic law ﹕ is approached with function by the algebraic law that is a foundation. Precision of this kind of method is tall, computational heavy and complicated, but apply what wait for mathematical method with vector ﹑ complex number and matrix to apply along with what write a computer. Development is very rapid since 60 time. Commonly usedly interpolation ﹑ square approachs law ﹑ optimal approach a law to wait. Diagram method ﹕ is geometrical method of the foundation with athletic geometry. Concept of this kind of method makes clear ﹑ simple, can beg solution to comparative with certain precision the problem of limits, but precision is not as tall as analytic law. Commonly usedly athletic geometry law and the way of half horn roll that offers on its foundation wait. The measure that experimental law ﹕ adopts the experiment that turn over to beg solution orgnaization with the model of different orgnaization parameter (compose of according to circumstances is integrated) . Luo Baici theorem if the O 2O 3B 2A 2 of ﹑ of O 1O 2B 1A 1 of hinge four-bar mechanism of 3 different measurement and graph of O 1O 3B 3A 3(3 Luo Baici theorem) have following O 2B 1A 2 of ﹑ of O 1A 1A 3 of ﹕ closing and O 3B 3B 2 are A 1B 1 of Δ of hinge parallelogram ﹔ Δ O 1O 2O 3 of A 3B 3 of Δ of Δ B 2 A 2, the dot that go up in respective connecting rod can be drawn same a curve, calls Luo Baici theorem. When integrated emersion gives the hinge four-bar mechanism of course Zuo , when the orgnaization that goes out when the design cannot satisfy the other condition such as transmission role size and installation position, with Luo Baici theorem can reach additional the orgnaization of two different measurement, with choose of benefit Wu Xuan. CNC Milling