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the analysis of basing and formoobrazovanija large-sized cylindrical surfaces of component parts at processing of a type of pins of mills

Process of restoration of the form of the worn out working surfaces of a pin without their dismantle with equipment use is enduring and is accompanied by considerable expenditures of labour.

Works, publications and works [21, 95, 116], devoted to the given problem, in some works [22 are known...

26] processes of restoration of cylindrical surfaces are investigated, over it worked as Fedorenko M. A, Pelipenko N.A., Bondarenko J.A., Pogonin A.A., etc.

Questions formoobrazovanija and basings of such products can be considered by analogy with bestsentrovym abrasion [36, 39], which features:

- The piece of work rotates in a prism without making fast freely;

- Exception of deformation of a component part at its making fast;

- Rotation in a prism without making fast allows to correct deflexions from the form of a ground surface;

- The processed surface is a base surface, errors of the geometrical form are distributed symmetrically on diameter;

- Maintenance of correct process of cutting occurs at a component part clip to basing elements;

- Sliding of a component part and accuracy of rotation does not depend from radial bieny component parts;

- Modification of geometry base, its continuous updating is created by conditions to its rounding off.

Studying a question bestsentrovogo abrasions on motionless bearers, Gebelem I.D. has been established theoretical law of process formoobrazovanija [36, 38, 39], the question of influence of a relative positioning of a grinding wheel and a component part on size of a deflexion from kruglosti a processed surface [38] is studied. The surface which is used as base in researches G ebelja is set by number Fure, taking into account that the deflexion of radius of a component part from a circle to nominal radius is much less than unit. Having assumed, that basing occurs on points, Gebel has deduced dependence of change of radius of a processed surface on the main parametres, and investigating which has received conditions at which errors reach the extremes. The minimum of carryover of errors of base on a processed surface is defined by a parity nonlinear loadings and a corner of installation of a bearer. The greatest value of an error of the form of the processed worker
Cylindrical surface in comparison with the initial it is observed at a constancy of a corner of installation of a bearer. The given work is based on a constancy of the form of a surface of base which is set by number Fure.

The analysis of process of rotation of the bulwark on bearers leads to Gebelja I.D. to reception of stabilisation of an axis of component part slowly rotating on bearers. Minimising of movings of an axis in a plane connecting axes of a component part and a circle, compensates nekruglost bases and the base will allow to receive the processed surface of more round, than. The highest effect of it is reached on self-established bearers. For the purpose of convenient studying of a question formoobrazovanija a cross-section, a profile of a piece of work it is presented in the form of the imposed sinusoidal errors on a circle. The sinusoidal law of an error represents a spectrum of harmonious components.

For the purpose of process display formoobrazovanija, apply decomposition of base function of a geometrical error of a component part in trigonometrical number Fure [37]. Any n-я a harmonious error of process formoobrazovanija [39]

Elementary relations of a profile of geometry of a cylindrical surface in a longitudinal section [57]

The given dependence shows, that the error of longitudinal geometry of a piece of work depends on intensity semai lengths of a component part [27, 28], without dependence from adjustment and rigidness of the machine tool. With reduction of size of an upper allowance of metal of a component part the arisen error while a pliability of knots of the machine tool and not its qualitative adjustment can lead to growth of an error [44] is reduced.

At carrying out of researches of statistical data, it is proved that deterioration of a working surface of a pin in

Some cases leads to cylindricity loss, thus represents the form close to a truncated cone. Points forming belong to a cone:, which moves along an axis

OY on ugoltekushchaja the point also turns

Then the surface equation

Whence follows

The received equation of a working surface of a body of torsion in the Cartesian system of co-ordinates. At displacement of the centre the equation (1.7) will look like

The given equation (1.8) is the equation of a working surface of a body of torsion at the first approach in the Cartesian system of co-ordinates at carryover of the centre of co-ordinates.

Use offered Prohorovym A.P. and others of dependences to a studied way of processing of pins is impossible, whereas formoobrazovanie longitudinal geometry at the given way of restoration of the working capacity of a working surface of a pin lost in the course of loss demands additional researches.

By results of the review of loss of working capacity of large-sized basic rotating component parts of assembly units principal causes are established: at

Non-observance of the requirements, presented to the design documentation, on drawings of component parts and assembly units, at non-observance of the requirements shown to the technological documentation at manufacturing of component parts and knots, entering into assembly units, as a result of non-observance of requirements to quality and accuracy of processing of mated surfaces and component parts. At manufacturing of component parts the industrial production process of processing is not always observed, in some cases the metal chemical compound is broken, there are misfittings of the sizes and component part tolerances to drawing data. At the enterprises requirements on quality of assemblage and installation of knots and assembly units, untimely and incomplete greasing of knots are not always observed. While in service the assembly unit there are vibrations and vacillatings which lead to deterioration of mated surfaces, to teases and zaboinam on working surfaces of component parts.

1.5.

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A source: Bestuzheva Olga Vasilevna. Perfection of technology of restoration of pins of mills under operating conditions with application of the added machine tool. The dissertation on competition of a scientific degree of a Cand.Tech.Sci. Belgorod - 2017. 2017

More on topic the analysis of basing and formoobrazovanija large-sized cylindrical surfaces of component parts at processing of a type of pins of mills:

  1. Chapter 2. Working out of a mathematical model of optimisation of parametres of processing of working cylindrical surfaces of pins of mills
  2. definition of rational parametres of rotational processing of a working cylindrical surface of pins of mills
  3. the review and the analysis of the existing equipment and the tool applied at processing of pins of mills
  4. Chapter 4. Results of experimental researches of restoration of a working cylindrical surface of pins of mills
  5. optimisation of modes of rotational processing of pins of mills with use of the added machine tool
  6. Chapter 1. The analysis of researches in the field of restoration of pins of mills
  7. the analysis and grading existing futerovok spherical drum-type mills
  8. 1.2. The analysis of existing design procedures at designing futerovok spherical drum-type mills
  9. optical properties of large-sized monocrystals of germanium
  10. CHAPTER 3. MICROMORPHOLOGY OF THE SURFACE OF LARGE-SIZED MONOCRYSTALS GERMANY
  11. a choice of initial data for modelling of process of processing of a working cylindrical surface of the worn out pin of a mill
  12. the analysis of the reasons of a change in shape of a working cylindrical surface of a pin
  13. THE CONDITION AND THE DIRECTION OF DEVELOPMENT OF DESIGNING FUTEROVOK OF SPHERICAL DRUM-TYPE MILLS
  14. 5.1. An engineering technique of designing futerovok spherical drum-type mills
  15. the one-particle potentials for a cylindrical pore and two-dimensional cylindrical adsorbents (nanotrubok)
  16. THE TECHNIQUE OF CARRYING OUT OF EXPERIMENTAL RESEARCHES OF PROCESS OF LEVIGATING IN SPHERICAL DRUM-TYPE MILLS
  17. Bestuzhev Olga Vasilevna. Perfection of technology of restoration of pins of mills under operating conditions with application of the added machine tool. The dissertation on competition of a scientific degree of a Cand.Tech.Sci. Belgorod - 2017, 2017
  18. Ajdinjan Has named Vaagovich. the KINETICS of GROWTH of LARGE-SIZED MONOCRYSTALS paratellurita And Germany In the METHOD of the CHOHRALSKY. The dissertation on competition of a scientific degree of the candidate of physical and mathematical sciences. Tver - 2017, 2017
  19. Ivanov Alexander Ivanovna. Micromorphology of a surface and dislocation structure of large-sized optical crystals of germanium and paratellurita. The dissertation on competition of a scientific degree of the candidate of physical and mathematical sciences. Tver - 2015, 2015