Energy-saving technology and equipment for vibration stabilization of residual stresses

Our company has a scientific school in the field of stabilization of residual stresses, which is one of the first and one of the world's two leading scientific schools.

The founder of the scientific school academician Kolot Vladimir Alexandrovich created in 1988 the world's first installation of vibration stabilization of residual stresses with computer diagnostics, this installation was awarded a gold medal at the exhibition VDNH.

Also, Vladimir Alexandrovich developed the world's only technology for vibro-resonance dressing of nonrigid parts, which still allows you to manage defect in production, caused by warping, to millions of dollars.

With the help of this technology, the warping of welded shells of powerful electric motors, warping of 18 meter shafts etc. are corrected.

Our company offers a unique:

Energy-saving technology and computerized equipment for vibration deformation (accelerated) aging of parts are designed to stabilize residual stresses in welded, cast and other dynamically non-rigid metal products with a mass of up to 50 tons, such as cores, frames, shafts, cogwheels, beams of presses, carriages of wagons, locomotives and the like. instead of stabilization annealing and other types of artificial and natural aging.
It is possible to use this technology for cold dressing of non-rigid products due to the use of potential energy of residual stresses.

Vibration stabilization can be performed depending on the type of billet, the nature of production and the technical requirements for the final product both immediately after the preparation of the billet and in the interval between the stages of machining.

Technical characteristics of the vibrating installation mod. VSON 2100/2500

Characteristic	Value
Range of disturbance force regulation, N	(0,15…2,1)х104
Range of speed of unbalanced mass, min-1	600…6000
Power of the exciter electric motor, kW, in the mode:
nominal	0,78
forced	1,3
Consumed current of exciter, A	40
Supply voltage, V
exciter	27
installations	380
frequency Hz	50
Power consumption, kW, not more than	1,5
Life time	not less than 5 years.
In terms of resistance to climatic influences during operation, the installation corresponds to the performance of UHL category 3.1 according to GOST 15150-69.
According to the method of protecting a person from electric shock, the installation corresponds to class I in accordance with GOST 12.2.007.0-75.
Overall dimensions, mm
exciter (length, height, width)	465х265х360
cabinet (length, height, width)	1130х1179х669
Weight, kg, no more than
cabinet	180
vibro-exciter (with built-in electric motor)	55
three vibro sensors in the assembly and an amplifier unit for taking characteristics in 3 orthogonal planes and the resultant	1,9
connecting cables	4,2

The developed equipment allows to stabilize ("remove") residual stresses, control the degree of stability of residual stresses when registering the characteristics of the workpiece during the processing and after processing, as well as evaluating the results of processing after a semi-automatic or automatic mode with the output of the results on a hard copy.

Advantages of the developed technology of accelerated vibrodeformation aging:

1. Absence of deformations (deplanations) arising during the removal of "OH" during low-temperature annealing (artificial aging).
2. Mechanical properties (σ; σв, δ) do not change under tension, and due to intercrystalline friction, an increase in rigidity takes place in the corresponding modes in the course of vibration processing (the part is elongated during heat treatment).
3. Low production costs (less than 10% of annealing costs), costs for inter-shop transportations, expenses for lifting and transport operations are reduced.

4. The vibration processing is a mobile process, it can be performed for details of any size (there are no limitations related to the dimensions of the furnace).
5. Decarburization does not take place, scaling is formed. reduction of the percentage of carbon in the workpiece (the metal "softens"), and the burning out of oxygen, especially in the welds, causes structural heterogeneity in them and contributes to reducing the resistance to cracking.
6. There are no problems related to ecology and sanitary norms.

7.Technology on the recommended regimens does not cause a decrease in the cyclic endurance of products. The use of traditional thermal methods for "removing" residual stresses in structural steel is not only an expensive method, but also not applicable due to the reduction of mechanical properties to 25% (steel 3) and more than 48% for 09G2S steels.
8.Technology allows to perform quality diagnostics (presence or absence of defects) of metal structures by parametric resonance and amplitude drift under phase shift.

The cost of buying a vibration unit and the introduction of vibration aging technology pay off after processing two 25-30-ton non-rigid welded metal structures or cast, welded-cast products.

Currently, NPO MINETEK-TECHNOLOGIES manufactures and supplies technological complexes for stabilizing residual stresses and vibration straightening of welded and cast body products made of various steels.

We also provide services for stabilizing residual stresses using mobile equipment both at our plant and at the customer’s premises.

Remember! Low-temperature annealing worsens the cyclic endurance of parts, and vibration resonance treatment, on the contrary, increases the cyclic endurance. At the same time, vibration resonance treatment provides a clear, documented process of stabilizing residual stresses, which cannot be done with low-temperature annealing. And there is no need to talk about the cost and time standards for annealing.

IMPORTANT !!!

Do not use the services of charlatans, contact only professionals who have a scientific school, many years of experience and their own production facilities, where they are constantly improving their technologies.

Vibration processing frames of locomotive carriages

at the Lugansk Diesel Locomotive Plant

Article on residual stresses:

https://minetek.donetsk.ua/posts/26-residual-stresses.html

vibration treatment, residual stresses, stabilization of residual stress

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