Device for Wood-Cutting Tool Hardening
Journal Title: Lesnoy Zhurnal (Russian Forestry Journal) - Year 2021, Vol 7, Issue 5
Abstract
Choosing effective methods and devices for surface hardening of wood-cutting tools is problematic due to the variety of their designs and operating conditions. In this regard, the development of such devices becomes an urgent task. According to the literature, one of the effective methods for increasing the service life of machine parts and tools is electrospark hardening or electrospark alloying. Industrial electrospark installations such as “EFI” (electrophysical measurements) and “Elitron” with manual vibrators are used for electrospark hardening. However, using manual vibrators significantly increases the labour intensity and hardening time. Moreover, the surface quality after hardening with manual vibrators is often unsatisfactory. Various mechanized installations have been developed in order to reduce the labour intensity of electrospark hardening. Nevertheless, these installations are designed to harden specific parts and do not allow hardening tools of various designs, including woodcutting tools. The surface quality after hardening in mechanized installations does not always satisfy the customer. Further surface plastic deformation treatments, such as rolling and unrolling with rollers and balls, as well as diamond burnishing, are often used to improve the surface quality after electrospark hardening. The surface quality after additional processing by these methods boosts, although the labour intensity and cost of the hardening process increase. To increase the wear resistance of machine parts and tools, it is reasonable to reduce the height parameters of roughness, increase microhardness, and form the residual compressive stresses, which is ensured by the methods of surface plastic deformation. In this regard, it becomes necessary to use electrospark hardening simultaneously with surface plastic deformation. The work presents the design and features of using the device for hardening. The device was used to strengthen the thicknesser machine knives, which made it possible to almost double their durability. Applying this device, in comparison with using the electrospark hardening with a manual vibrator, reduces the roughness of the hardened surface and improves the surface quality of the processed workpieces. The modes of hardening have been installed, making it possible to effectively harden wood-cutting tools.
Authors and Affiliations
Anatoly M. Buglaev, Doctor of Engineering, Prof. ; ResearcherID:AAH-2776-2021, orcid: https://orcid. org/0000-0001-6923-4815
Keywords
Related Articles
- EP ID EP697381
- DOI 10.37482/0536-1036-2021-5-134-141
- Views 149
- Downloads 0
Surface Treatment of Fiberboard Wood Pulp Mat with Dispersed Water (by the Example of Arian Sina MDF Company)
This research focuses on the effect of mat water spraying on the production yield and the quality of medium density fiberboard (MDF) on an industrial scale at Arian Sina MDF Company. A total of 180 raw medium density fib...
The Effect of Long-Term Periodic Fertilization on the Structure of the Stand and the Ground Cover in the Cowberry Pine Forests of Middle Taiga (Republic of Karelia)
The results of research on studying the influence of after-effects of periodic nitrogen (N) and complex fertilizer (NPK) treatments on the structure of the tree layer and ground cover are reported. The study objects were...
Sibs Progeny of Curly Birch at the Zaonezhye Forest Seed Orchard
The article reports the results of studies on the growth and development of curly birch sibs progeny (produced through controlled pollination) aged 35 and 15 years growing in the Zaonezhye forest seed orchard (sites 1 an...
Dimension and Quality Specifications of Round Logs Harvested with the Use of Multi-Operational Forest Machines
It is necessary to carry out a statistical assessment of the harvested wood parameters in order to increase the yield of round timber and the overall productivity of logging operations while operating multi-operational f...
Forest Sustainability of Ecotopes of the Volga-Akhtuba Floodplain when Cultivating Pine Plantations
In the south of European Russia, the largest sand massifs are found in the zone of dry steppes and semi-deserts. Effective utilization of such lands requires creation of protective forest planting of drought-resistant co...