After the machine tooling method and the overall preliminary structure are determined, preliminary planning is required for each part. At this time, it is necessary to clearly understand the functions of each part and determine which mechanism is used to realize the functions of these parts. The premise of making these plans is to consider the installation and disassembly of this component or component. For example, for consumables or consumables or for some devices and mechanisms that require frequent adjustments, it is necessary to consider the convenience of proper disassembly and repair. For example, if you want to replace a V-belt, it is not a good design to remove and replace the machine.
For example, when we determine the problems to be considered when using the conventional linear feed mechanism, there are the following aspects: (In combination with the actual efficiency and precision requirements, certain implementation forms are clearly defined. Of course, there are commonly used forms of guide rails and lead screws. The friction screw or the rolling friction screw should be determined according to the actual situation. Transmission efficiency, positioning accuracy, dynamic response, load condition, speed characteristics, thread angle, axial load that the screw can bear, lead, cost Cost, and other factors must be considered comprehensively.) Another example is the intermittent motion mechanism. Before the motor control technology is still perfect, it is really a lot to implement such a mechanism. (Slotted wheel form, incomplete gear form.) The landlord personally thinks that it is difficult to make mechanical design difficult to simplify complex problems. For those who are digging into some sophisticated and complicated mechanisms, such as cylindrical/disc cam mechanism, the strange and unpredictable space The organization, the infinite four-bar mechanism, and some incomplete gear mechanisms and shaped gear mechanisms that test the manufacturing and manufacturing personnel.
The landlord does not agree with the design that deliberately wants to make some people do not turn around and can't figure out the situation. Of course, the precondition is that we can completely solve the situation by one-dimensional linear motion or two-dimensional plane interpolation or three-axis linkage. The use of servo motor and linear rolling friction drive and guiding device can perfectly solve the need for intermittent, acceleration, stroke amplification, special motion curve, why do you have to make complex, difficult to manufacture, not universal The dazzling of repair and assembly personnel, inexplicable and mostly the mechanism of sliding friction relationship? Some people may say that a set of two-dimensional plane linear interpolation motion platform has erased many of the institutions left by the predecessors that can be truly called the essence of mechanical design.
For this, the class is a very ironic joke. (A new soldier is training in the wild, he has been hungry for several hours of wood, or he has not been able to achieve firewood and fire as an ancestor. After exhaustion, he touched the lighter and cigarettes, first took the smoke on the stone. , to relieve the tone, continue to ponder the skills of this wood-fired fire.) Of course, for some necessary and necessary institutions can not fully adopt the modern fast-food design culture to fill and achieve. For example, an eccentric device is used to obtain vibration characteristics or a quick locking device on the jig. Or it is necessary to use the overrunning clutch to obtain the reverse failure and other working conditions.
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