scholarly journals Ensuring the Quality of Treatment of Holes in Products from Polymeric Composite Materials

2019 ◽  
pp. 78-88
Author(s):  
V.M. Yaroslavtsev
Keyword(s):  
Composite Materials ◽  
Hybrid Composite ◽  
Energy State ◽  
Cutting Tools ◽  
Roughness Parameter ◽  
Polymeric Composite ◽  
Treatment Area ◽  
Energy Impact ◽  
Compressive Stresses

The generalized results of industrial and laboratory tests of unconventional technologies for improving the quality of manufacturing holes in products made of fibrous polymeric and layered hybrid composite materials are considered. Developed in BMSTU combined methods of processing, non-standard cutting tools and devices that ensure the combination of diverse energy impact on the treated surface, as well as the targeted creation of the required energy state of the material were given. It is shown that the application of the cutting method with additional technological coating on the operations of reaming, deployment and boring provides, depending on the processing conditions, a decrease in surface roughness of 1--3 classes (from 4 to 5--7 classes). Drilling with a thermo-mechanical impact on the cutting layer reduces the roughness parameter from Rz = 40--20 μm (class 4) to Ra = 2.5--1.6 μm (class 6). At the same time on the treated surfaces, fluffiness is completely eliminated. The possibility of increasing the productivity and quality of processing holes in multilayer hybrid composite materials by the use of special-purpose drills, which clean the processed surface on the backward pass of the tool, is considered. Practical recommendations are given to ensure defect-free processing of the hole edges at the tool inlet and outlet using additional coatings, as well as the creation of compressive stresses in the treatment area with the help of special tools.

scholarly journals Cutting mode impact upon output process parameters at processing of polycrystalline composite materials

2017 ◽  
Vol 2 (6) ◽  
pp. 34-38
Author(s):  
Ю. Зубарев ◽  
Yu. Zubarev ◽  
А. Приемышев ◽  
A. Priyomyshev ◽  
А. Заостровский ◽  
...  
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Process Parameters ◽  
Polymeric Composite ◽  
Polymeric Composite Material ◽  
Output Process ◽  
Product Surface ◽  
Required Quality ◽  
Material Cutting

The peculiarities in polymeric composite material cutting are considered. The recommendations for use of different materials for cutters, their geometry and treatment modes are offered that allows obtaining the required quality of a product surface.

scholarly journals STUDY OF THE INFLUENCE OF CUTTING FLUID AMOUNT IN STEEL TURNING OF AISI 52100

2020 ◽  
Vol 5 (7) ◽  
pp. 49-56
Author(s):  
Ítalo de Abreu Gonçalves ◽  
Leonardo Leite ◽  
Tarcísio G. De Brito ◽  
Emerson J. De Paiva ◽  
Carlos H. De Oliveira ◽  
...  
Keyword(s):  
Cutting Tools ◽  
Roughness Parameter ◽  
Cutting Speed ◽  
Cutting Fluid ◽  
Machined Surface ◽  
Aisi 52100 ◽  
Machined Parts ◽  
Steel Turning ◽  
Good Productivity

The steel turning AISI 52100 has been gaining prominence in industry in recent years, as it allows machined parts to have better quality without the need for furthers processes. However, to ensure the final product quality, it is important that the turning for machining procedure is well planned and prepared, so that the cutting tools have their wear minimized in the process, while putting good productivity rates and zero occurrences of reworked parts. Thus, this article will study the quality of the machined surface in the turning process using interchangeable PCBN inserts. The aim is to identify the optimal combination of the input parameters that are cutting speed (Vc), feed (f) and machining depth (ap). The response measured is the roughness parameter Ra, under the influence of cutting fluid and tool wear.

scholarly journals Innovation technologies of polymeric composite materials in mechanical engineering

2017 ◽  
Vol 2 (8) ◽  
pp. 36-42 ◽  
Author(s):  
Ю. Зубарев ◽  
Yu. Zubarev ◽  
А. Приемышев ◽  
A. Priyomyshev
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Chip Formation ◽  
Mechanical Engineering ◽  
Polymeric Composite ◽  
Polymeric Composite Material ◽  
Polymeric Composite Materials ◽  
Tool Materials ◽  
Material Cutting

The peculiarities of polymeric composite material cutting are considered: chip formation, wear of a cutter manufactured of different tool materials; forces of cutting and quality of a surface worked.

Results of osteopathic correction of patients with post-traumatic coccygodynia

2019 ◽  
pp. 19-27
Author(s):  
Yu. V. Antonova ◽  
A. M. Iskandarov ◽  
I. B. Mizonova
Keyword(s):  
Quality Of Life ◽  
Emotional State ◽  
Pain Syndrome ◽  
Control Group ◽  
Life Questionnaire ◽  
Treatment Area ◽  
Diffi Cult ◽  
Osteopathic Treatment ◽  
Post Traumatic

Introduction.Coccygodynia is a multidisciplinary disease which is diffi cult to treat. It seriously limits the ability to work and signifi cantly affects the quality of life of patients. The study of somatic dysfunctions in patients with coccygodynia and the analysis of the results of osteopathic treatment of such patients makes it possible to justify the necessity of osteopathic correction of coccygodynia.Goal of the study— to determine the structure of the leading somatic dysfunctions in patients with coccygodynia and to study the effectiveness of osteopathic treatment of this pathology.Materials and methods.The study involved 44 patients from 25 to 65 years old, randomly divided into two groups. The main group of 24 people (20 women and 4 men) received osteopathic treatment, in accordance with the identifi ed leading somatic dysfunctions. Patients of the control group (16 women and 4 men) were treated locally with soft manual techniques (the treatment area was limited by the pelvic region). In order to assess the results of the treatment, we examined the intensity of the pain syndrome and the psycho-emotional state of patients. The severity of the pain syndrome was assessed in accordance with the visual analogue scale (VAS). The psycho-emotional state (with physical and mental components) was assessed with the help of the SF-36 quality of life questionnaire.Results.Somatic dysfunctions typical for patients with coccygodynia have been identifi ed. Osteopathic treatment has proven to be more effective in comparison with local manual therapy of coccygodynia both in early periods and in 3 months after the end of the treatment course.Conclusion.Osteopathic treatment of post-traumatic coccygodynia is effective, and can be recommended for treatment of such patients.

Conceptual imposings of quality management of system of production of composite materials for it is rocket the space equipment

2017 ◽  
Vol 14 (4) ◽  
pp. 30-38
Author(s):  
V. G. Isaev ◽  
T. N. Antipova
Keyword(s):  
Composite Materials ◽  
Quality Management ◽  
Evaluation Criteria ◽  
Criteria And Indicators ◽  
Properties Of Materials ◽  
A Priority ◽  
Required Quality

Basic provisions of the concept and methodology of production of composite materials for the missile and space equipment are offered. The system of the purposes realizing the principle of a priority of the purposes of the customer is offered. The system of evaluation criteria and indicators of quality of composite materials the realizing interrelation of requirements of the customer to quality of material and dependence of ensuring the required quality on the used technologies is developed. It is shown that for ensuring quality of composite materials for units and the RKT systems first of all it is necessary development of mathematical dependences of properties of materials on parameters of the technological modes in the conditions of obligatory implementation of requirements of the customer.

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