The increasing of vibration stability for the technological system is always the vital task for different material processing. Vibration stability increasing methods are divided into constructive and technological. It’s necessary to take into consideration different factors such as vibration whence, vibration parameters, immediate changing of processing mode possibility while choosing the method of vibration decreasing for the technological systems.

The present study is reviewing the research methods of milling technology elements as one of the basis of technological methods for increasing of vibration stability. Scientific research methods of milling technology elements determines the low level of vibration for cutting modes which save tool from premature failure.

2. Constructive and processing methods of reducing vibration level of the metalworking machinery elements

Searching solutions for minimizing vibration level of the metalworking machinery always remains an issue of high priority. The methods of enhancing vibration resistance may be conventionally classified as constructive and processing.

Constructive methods are focused on stiffening effect measures applied to the technological system elements during construction and mounting of the system, and on the use of vibration damping equipment. Processing methods are based on cutting mode selection, optimization of tool geometry parameters, and application of process cutting fluids.

The study is devoted to the basic methods of reducing vibration level of the technological system elements. 3. Pneumatic device of the preload and dynamic loads balancing to reduce the intensity of thermal processes in the metal cutting process

Improved reliability of the technological system «machine-tool-instrument-detail» is an important current task. Backlashes and insufficient stiffness of technological system lead to intensive wear of the cutting tool, increasing the heat in the cutting zone. Due to high temperature in the thin surface layers of the workpiece and tool thermal processes may occur which are similar to release and can cause the structural changes of the material. The current study presents the final design of the device which has been developed to reduce the intensity of thermal processes in metal cutting.

The results of the simulation conducted in the Lab View National instruments, confirmed the adequacy of the structural diagram and the promising use of the damping device.

Basing on further comparison of spectrograms we made a conclusion that the presence of backlash between the operating body and the machine-tool leads to an increased oscillations amplitude that negatively affected the processing quality of the parts.

As a result of applying preload, the reduction in vibration and noise in the technological system is attained, the quality of treatment increases, tool life increases by reducing the intensity of thermal processes in metal cutting. It is confirmed by experimental data.

4. Mobile complex for rapid diagnosis of the technological system elements

The study shows the up-to-dateness of the new informing and measuring tools and technologies development. It is reviewed the mobile complex for runtime diagnostics of technological system ”machine-tool-instrument-detail”. It was found that the use of the complex allows to identify the frequency area in which the appearance of resonance of the technological system elements is possible, and thus to draw a conclusion on the technical state of the diagnosed object. It is concluded that there is the prospects for the use of the above mentioned mobile complex for vibration diagnostics. It is possible to determine the frequencies close to resonance, according to the obtained values of the vibratory displacement as well as the crest factor value can be determined, as the ratio of maximum amplitude value of time signal to RMS.

Increased values of cross-factor (above 1.41) indicate the presence of impact in the drive elements, which requires thorough diagnostic. Thus, the mobile complex for fast diagnosis of the technological system elements with improved special software allows to optimize the signal processing in the terms of filtration and frequency analysis, and the research carried out by students, has demonstrated how simple to operate the complex.

5. Hydrostatic vibratory drive of the test stand for excitation of the amplitude-modulated vibrations

The study reviews the problems arising during the development of the test stand hydrostatic vibratory drive, which synthesize controlled amplitude-modulated vibrations required testing of vibration strength and vibrostability of technological devices. The newly developed modification can adequately simulate the transport vibration and vibration of the operating power-supply units of technological machinery vibration by means of implementing of a continuous frequency spectrum of the vibration exposure in the desired frequency range.

Further development of the concept of hydrostatic drive for the vibrational test stands requires creation of the dynamic excitation systems of random narrow-band vibration with the high level of harmonics spectrum density. This type of testing machines are capable to synthesize the random oscillations, simulating as much as possible the transport vibration and the vibration of the operating power technological machinery at high lifting capacity due to the energy and control possibilities of the volume hydraulic drive. 6. Stand for dynamic tests of technical products in the mode of amplitude-frequency modulation with hydrostatic vibratory drive

This study reviews the development of hydraulic drive of vibration stand for testing technical products for vibration resistance by random vibration method. The new design allows adequately simulating vibration during transportation and from power units by using gapless narrow-band spectrum of random vibrations.

The changing narrowband random vibration mode is one of the most effective methods for vibration testing. Depending on the appropriate stand settings and adequate test method it is implemented a large number of the most important accelerations at a given level as at the broad-band vibration tests. 7. Hydraulic drive of vibration stand for testing technical products by random vibration method

This study reviews the development of hydraulic drive of vibration stand for testing technical products for vibration resistance by random vibration method. The new design allows adequately simulating vibration during transportation and from power units by using gapless narrow-band spectrum of random vibrations.

The changing narrowband random vibration mode is one of the most effective methods for vibration testing. Depending on the appropriate stand settings and adequate test method it is implemented a large number of the most important accelerations at a given level as at the broad-band vibration tests 8. Land-based sources of seismic signals

Variety of operating mechanisms and methods of control are used as a base for creation of seismic sources of different types.

Source performance specifications depend on the range of parameters of all components. It is therefore necessary to consider each component separately. This is the content of individual works. 9. Actuators of the Seismic Vibrations Sources

We can conclude that the heavy weight of a clamp is one of the main drawbacks of modern seismic vibration sources, limiting the geographical range as well as performance of field woks. Also the development of a vibrating source of regional characteristics of high power should be carried out taking into account the weight and size parameters of the machine as well problems of clamping the base plate to the ground is to be resolved.

This disadvantage can be avoided if inertial mass is replaced by the active periodically dropped weight.