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The selection about the movement principle of cam and groove coupling

Source: Notetime: 2014-03-31 15:59:48 click: 3029

  Cam and groove coupling regular exercise choice or design , involving many factors . In addition to the work required to meet the specific requirements of machinery , it should also make the cam and groove coupling mechanism has good dynamic characteristics , while also considering the design of cam and groove coupling profiles ease of processing, these factors are often mutual restraint . Therefore, when selecting or designing sports law , must prioritize according to applications , working conditions , considering . Here are some common law of motion for occasions :

  First, the constant , in many cases the movement of the work to meet the requirements cam and groove coupling of pushing mechanism , but in the presence of rigid impact position of the start and end of the trip cam and groove coupling , the movement characteristic is the worst curves, etc. speed movement of rarely used alone , and does not apply to , and high speed .

  Second, the acceleration and deceleration movement of such a continuous velocity curve , all curves in the maximum acceleration value is the smallest, but the beginning of the stroke of the driven member , and to terminate the acceleration changes from positive to negative acceleration intermediate position limited acceleration value of the mutation will lead to flexible impact , and therefore can not in the high-speed occasions.

  Third , the cosine acceleration motion acceleration mutation eliminates mid-stroke position , and easy processing and calculation , the movement can be obtained in reasonably follower when the speed . But this law of motion is used up - stop - back - stop motion , at the start and end of travel position remains flexible due to the impact of the acceleration mutations . When this rule is used up - back - up type movement , then the acceleration curve continuously , no flexible impact .

  Fourth, the sine acceleration motion for l - stop - back - stop motion , cam and groove coupling at the start and end positions stroke acceleration no mutation , and thus no impact on flexibility , help organizations running smoothly . But it is used up - stop - back - stop motion , pushing away at the connection point with the return of jerk from a limited positive to negative , and thus the acceleration curve is not continuous . This curve machining accuracy requirements than other curves. Sinusoidal acceleration motion is widely used in medium-speed cam and groove coupling mechanism , but not suitable for high-speed applications.
 

from:http://www.bauercoupling.com/newsd-nid-192.html