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卷 36, 编号 11 (2016)
- 年: 2016
- 文章: 19
- URL: https://journals.rcsi.science/1068-798X/issue/view/14010
Article
Controlled explosive drilling of boreholes for pile foundations
摘要
Controlled explosive drilling of boreholes for pile foundations is investigated.
895-901
Information support for manufacturing components
摘要
The principles of information support in the development, design, production, operation, and disposal of manufacturing components are considered.
902-905
Battery efficiency in hybrid and electric vehicles at negative temperatures
摘要
By calculating the battery heat losses at negative ambient temperatures, guidelines may be established to ensure effective battery operation in hybrid vehicles and electric vehicles at such temperatures.
906-909
Strength of the hypoid gear
摘要
A method is proposed for calculating the fatigue strength in tooth flexure and the resistance to jamming of the contacting tooth surfaces for a hypoid gear.
910-915
Influence of plasma quenching on the wear resistance of 45 and 40X steel
摘要
For the example of a disk–shoe frictional pair, it is shown that the use of cold-rolled carbon steel 45 with plasma quenching instead of heat-treated 40X structural steel not only reduces wear and expenditures on materials but also shortens the production process.
916-919
Recuperative shock absorber
摘要
In the proposed device, some of the energy from the shock absorber is used to charge the vehicle’s battery. This device is based on the creation of emf in an induction coil wound on a frame whose axis is aligned with the shock-absorber piston.
920-922
Rheological parameters of polymer resins for composite production
摘要
A device for determining the dynamic viscosity and yield point of polymer resins is considered. The proposed formulas permit the calculation of these parameters from the experimental deformation of the polymer resin.
923-925
Active monitoring systems in the machining of discontinuous surfaces
摘要
A machine-tool system for active monitoring by vibrocontact measurement is proposed. This equipment increases the machining precision and productivity and also the technological margin of precision.
926-929
Fiberglass-composite exhaust pipes for gas compressors
摘要
If the exhaust pipe of a gas compressor is made of composite, it may operate at 300—400°C. The composite considered is fiberglass based on modified polyimide binder.
930-933
Automatic control of manufacturing processes: A model
摘要
A model is proposed for the automatic control of manufacturing processes and the necessary preparations. The model is based on step-by-step implementation of a systematic approach and a feedback mechanism. In automated control, the preparations, involving CAD/CAPP/CAM/PDM systems, are integrated with control of the manufacturing process. The model permits the use of paperless technology based on a 3D model of the part and three important stages in the derivation and analysis of information regarding the operation of the working centers. Subsystems permit monitoring of the equipment and the cutting tool and analysis of product quality so as to formulate corrective measures on the basis of feedback mechanisms.
934-939
Influence of the elastic properties of supply drives on their dynamic characteristics
摘要
The supply drives of numerically controlled machine tools with a screw–nut transmission may be described on the basis of models adequately reproducing the resonant phenomena in the position and speed control loops due to longitudinal and torsional vibrations of the structural elements. The influence of such phenomena on the stability and dynamics of the drive is considered, along with effective preventive measures.
940-947
High-quality tools in the machining of commutators
摘要
The design of tools for machining the commutators of electric motors is considered. To improve machining quality and the productivity of commutator repair, the finishing operations—grinding and polishing—may be replaced by final turning with a cutter sharpened by superblade technology.
948-950
Systems approach to the design of technological equipment for metal-cutting machines
摘要
The design of technological equipment for metal-cutting machines is considered, for the example of machining and monitoring attachments. Their design on the basis of a systems approach is outlined. The principles and technology for systems design of technological attachments are briefly outlined.
951-955
Stability of shaping trajectories in milling: Synergetic concepts
摘要
The use of synergetic concepts in studying the steady shaping trajectories of the tool relative to the workpiece in end milling is discussed, with allowance for elastic displacements and their stability. A two-level hierarchy of dynamic equations is employed. At the first level, steady trajectories are considered. At the second, their stability is analyzed on the basis of variational equations for these trajectories. The case in which the pulsed reaction of the system is an order of magnitude less than one period of the displacement cycle is considered.
956-964
Selection of highly porous CBN wheels in the multiparametric modeling of topography for the grinding of stainless steel parts using fuzzy logic
摘要
Multiparametric optimization of wheels for the grinding of 06Cr14Ni6Cu2MoWTi-Sh steel parts is based on fuzzy logic and the statistical interpretation of observations.
965-973
Optimal internal grinding cycles in multidimensional control-parameter space
摘要
A method is proposed for the design of optimal internal grinding cycles in multidimensional control- parameter space, under numerous technological constraints. This method is based on stepwise modeling of metal removal in terms of specified machining properties, with allowance for elastic deformation and the cutting kinematics. Optimization is based on dynamic programming, which permits any number of technological constraints to be taken into account and is not sensitive to the type of mathematical models employed or the constraints on the target function.
974-978
Algorithmic model of the continuum design of grinding
摘要
An algorithmic model is proposed for the design of grinding operations in multiproduct manufacturing. This continuum model is based on prediction of the performance of abrasive tools and improves their effectiveness in a wide range of conditions. That improves the overall efficiency of abrasive machining and hence the competitiveness of the manufacturing enterprise.
979-981
Surface polishing of lithium-niobate single crystals
摘要
The polishing of a lithium-niobate single crystal is considered. Specifically, the influence of the applied pressure and relative speed on the productivity and the quality of the machined surface is studied. A formula is given for the total depth of the surface layer removed in finishing and the polishing time required for its removal.
982-984
Polishing tool for optical materials
摘要
The influence of various abrasive materials on the polishing of lithium-niobate single crystals is studied experimentally. In the analysis of the polishing tool, the tool life, the productivity, and the quality of the machined surface are taken into account.
985-989