Nowadays, most printing companies tend to prefer advanced products when purchasing printing equipment, so that they can smoothly receive the tasks that require high printing quality, while high intelligence, high stability, high quality, high speed and high reliability. The five factors determine the quality and market prospects of advanced offset presses.
How to reduce the vibration of the offset press is the focus of these five factors. In order to reduce the vibration of the offset press, it is necessary to start from the aspects of finding the vibration source, reducing the vibration source, and improving the anti-vibration function of the body.
First, the method of reducing the vibration source
1. The cam structure is the main factor for the vibration of the offset printing machine. Therefore, when designing, the convex contour should be multi-targeted to reduce the acceleration jerk and the acceleration peak. Improve the processing accuracy of the convex contour and the gear, which can reduce the precision error, improve the smoothness of the gear transmission, and reduce the vibration of the offset printing machine during high-speed movement.
2. Try to use materials with light weight and reasonable cross-section shape to reduce the quality of inertial parts. For example, aluminum can be used instead of steel, with a thin shaft instead of a thick shaft, a mandrel instead of a solid shaft, and a truss instead of a solid beam.
3. Balance the inertial force. In the structural design of the offset printing machine, it is necessary to carefully design the quality of the rocking and reversing parts, and try to make the center of mass of the rocking and reversing parts coincide with the center of reversal, so that the organization can overcome the conflicting force of the reversal center. Balanced cams, balance shafts or shock absorbers are widely used.
Measures to improve the anti-vibration function of the offset press are:
1. Increase the preload. Lubricants with higher viscosity can be used to promote stability, and materials can be filled in the drum to accelerate the decay rate of vibration.
3. Reduce the motion pair clearance, increase the touch length of the cooperating couple such as the hole axis, and the useful touch area of ​​the planar joint.
3. The frequency of encouragement and natural frequency of the carrier and base parts should be different to prevent vibration.
Reducing the vibration of high-end offset presses can effectively expand the market, improve work efficiency, and reduce cost. The rapid development of high-grade offset printing machines has also driven the development of other related industries in China, enabling all walks of life to complement each other and develop together to jointly promote China's economic and social progress.
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