№ 1 (63), 2018

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VII conference "Fastening. Quality and responsibility" and its results
VII conference "Fastening. Quality and Responsibility" was held on November 29-30 in St. Petersburg. The publication contains the information about reports made at the conference. The allocution and the letter accepted by participants of the conference are published here.

Low-quality fasteners – a barrier to the development of production
At the Rechitsa Metalware Plant the samples of details, imported to Russia and Belarus, were examined. These products often do not meet the stated characteristics and requirements of consumers. In the publication the distinctive features of poor-quality fasteners are described. To protect the fastener market from low-quality imports, a number of measures are proposed.

Problems of bolts quality of strength class 5.8 for building structures
The complex of mechanical properties of zinc-coated bolts of strength class 5.8, widely used in construction practice, was investigated. For the bolts of M30x120mm, M36x190mm, M42x150mm and M42x200mm the fluidity limit was approaching the level of the temporary resistance (701-907MPa). The impact toughness of ferritic-pearlitic steel for the studied bolts showed an increased tendency to brittle fracture. The critical temperature of brittleness T34, established by the work of failure for bolts of strength class 5.6 and equal 27J, is for bolts of M30x120mm, M36x190mm, M42x150mm and M42x200mm respectively +70°C, +55°C, +18°C and +100°C. To reduce the risk of brittle fracture of bolts of strength class 5.8 in the operation process it is proposed to supplement GOST ISO 898-1-2014 with the tests on impact toughness.

What studs should be in chemical anchors?
To determine the possibility of using studs with a thread that does not comply with GOST 24705-2004 (ISO 724: 1993), as a part of the anchorage with a chemical anchor the testing was prepared and made. As a result, it was confirmed that the use of studs with the changed thread geometry leads to a catastrophic strength decline in the thread crushing. This is a possible reason for changing the rules when carrying out full-scale tests due to the characteristics of the used test instruments. In fact, the use of the threaded adaptors of these instruments results in coming to the fact that at the field trials you investigate the strength of the stud itself but not the work of the anchor joint.

Magnetic control of fasteners made of medium-carbon alloyed steels
The current level of development of science makes it possible to predict the possibility of using a magnetic method for nondestructive testing of heat treatment regimes, chemical, structural and phase composition of products made of ferromagnetic materials, and the modern level of instrumental implementation of the method allows automatic control of it directly in workshops and factory laboratories.
Magnetic quality control of products from alloy steels with a carbon content of more than 0.3% has its own characteristics. In the article the methods and technical means related to the chemical properties of products made of alloyed carbon steels and the results of their industrial use are considered.

Fasteners and kickbacks. Disease history
The publication opens a new section of the magazine for the discussion of problematic issues. After a historical digression about the corruption the author gives variants of kickbacks. Attention is drawn to the unwillingness of the fastening companies to conclude an anti-corruption agreement.

Quality control of fasteners in the early twentieth century
The methods of testing bolts, studs and nuts, described in the "Reference book for ship engineers", published in 1916 in St. Petersburg, are presented. The comment of the scientific editor of our magazine is given.

Ways of word formation
The article opens a new section on terminology. There are four ways of forming the Russian-language terms from the foreign ones.

Russian language is harmonized
It is noted that the Ministry of Construction of Russia introduces the notion of "harmonization of languages". In the author's opinion, due to the long absence of terminology policy in Russia, the urgent need has arisen to restore the order in the Russian terminology.

Abnormal connections and fastenings – the reason for collapse of structures
As a result of the analysis of collapse of the object under construction, the commission, established to determine the reasons, announced the facts of deviations from the design solution. As the main reason for the collapse of roof trusses, the commission recognized inadmissible deviations from the project and regulatory requirements in the nodes of bolted joints and in the bolts themselves at the stages of manufacturing and installation of building structures of concrete cover.

“BuProx” will help in the calculation of the bolted connection
“BuProx” – a free appendix for evaluating the bolt connection is described here. The application is posted on the website of the company "Bulten".

What is to blame? Curves of interpretation of responsibility
The specifics of the Russian management are such that managers are given the power to enforce executors to perform their duties as stipulated in the employment contract. The article shows the diagnosis of the detection of the main "diseases" of the post-Soviet management systems.

Innovative technologies of sheet metal joints
In the current magazine issue and in No. 1, 3, 4 for 2016, as well in No. 1 for 2017 some innovative technologies for joining sheet parts are presented. This article is a continuation of those publications, it presents other methods of innovative connections of sheet metal parts. In particular, the use of the energy of explosives at riveting is described. The method for connecting various structural elements, having a large number of attachment points, is proposed.

RUKO GmbH is actively developing its production
The editor-in-chief of "Fasteners, Adhesives, Tools and..." magazine Alexander Ostashov, by the invitation of the management of the company RUKO GmbH, visited its production in Holzgerlingen near Stuttgart, Germany. An interview with RUKO GmbH specialists is posted here.

"Industry 4.0" and the fastener industry of Italy
In Italy "Plan for National Industry 4.0", which has the strategic guidelines, is developed. The applicability of the concept of "Industry 4.0" for the Italian enterprises of the fastening sector is discussed by the top management of several leading companies.

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Calendar of the Russian exhibitions

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