Abstract
The article considers the study of the synthesized concept of frictional contact of solids in crank presses. As a result of the analysis the possibility of obtaining the maximum load characteristic of the friction contact within the interval of variation of the friction coefficient has been established. The possibility of equality of the values of the friction force of the friction contact at the boundaries of the indicated interval in the presence of a maximum and the achievement of their greatest stability under these conditions is also revealed. As result the upgraded concept of frictional contact allows theoretically to obtain a very high stability of the friction force, however, due to the relatively large value of the angle and force parameter, it is used inefficiently. A necessary condition for the absence of zero reversal of the output parameter of the main friction group of the friction contact in the interval of variation of the friction coefficient and the presence of the maximum function of the load capacity of the friction contact is the transfer of its full load by the sensitive elements of the additional friction group. An additional condition for the existence of a maximum is the need for the sensitive elements of the main friction group to transfer part of its full load at an equal number of friction pairs of both friction groups, and for the sensitive elements to transfer the full load of the main friction group at a lower number of friction pairs than in the additional friction group.
Highlights
This article investigated the static and dynamic loading system of the safety friction clutch and synthesized the schematic diagram of the friction contact of solids in forging and stamping machines
The results show a high stability of the friction force during slippage of bodies, at large values of the pressure angle of the sensitive elements of the sensor-transducer, the maximum friction force can be briefly proportional to the current value of the friction coefficient [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]
A necessary condition for the absence of zero reversal of the output parameter in the interval of change of the coefficient of friction and the presence of a maximum of the load capacity function is the transfer of its full load by the sensing elements
Summary
This article investigated the static and dynamic loading system of the safety friction clutch and synthesized the schematic diagram of the friction contact of solids in forging and stamping machines. As a result of the analysis the possibility of obtaining a maximum load characteristic within the interval of change in the coefficient of friction is established. The possibility of equality of the friction force values at the boundaries of the specified interval in the presence of a maximum and achieving their greatest stability under these conditions is revealed. The results show a high stability of the friction force during slippage of bodies, at large values of the pressure angle of the sensitive elements of the sensor-transducer, the maximum friction force can be briefly proportional to the current value of the friction coefficient [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]
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