To the selection of feeder parameters for efficient operation of the impact machine when doweling soil slopes

The features of the wedge clamping mechanism for transferring impact energy to core technological elements (nuggets, injectors, grounding electrodes, etc.) are considered in order to select the optimal compression force of the impact machine to the ground face from the feeder.

A mathematical model of the force interaction of the elements of the clamping unit is presented in order to determine the most significant factors for the transmission of impact energy. The analysis showed that the coefficient of adhesion of the wedge to the surface of the core element and the coefficient of friction in contact with the anvil have the greatest effect on the accepted angle of the wedge.

Field experiments were carried out using an INSTRON 8802 servo-hydraulic press, during which the condition of the rod surface, the degree of blunting of the working edges of the wedges, and the clamping force were varied to determine the onset of cam slippage along the rod. Each experiment was carried out on a new section of the rod at a fixed pressure p in the pneumatic cylinder of the clamp and included at least five consecutive load-unloading cycles without resetting the clamp along the rod.

Graphs of experimental results and their analysis are presented. Recommendations are given for the design of wedge clamping mechanisms transmitting axial load. To control the clamp, it is advisable to use a thrust-feeding device – a feeder. It should be located outside of the system in question and be unrelated to it. The feeder allows you to obtain optimal forces that preload the machine without strict restrictions on dimensions, weight, and design. The force from the feeder also leads to the sampling of all gaps in the ‘PUM – clamp – ground face’ system, which increases the efficiency of energy transfer and the productivity of the process.

1. Smolyanitsky B. N., Syryamin Yu. N., Syryamin P. Yu., Vorontsov D. S. Justification of the parameters of the clamping mechanism affecting the operation of the impact system for driving rods into the ground. The Siberian Transport University Bulletin. 2016;(39):33–39. (In Russ.).

2. Anferov V. N., Syryamin P. Yu., Syryamin Yu. N. Reserves for increasing the productivity of an annular pneu matic impact machine during the construction of dowel fastenings of soil slopes. The Siberian Transport University Bulletin. 2025;(73):49–56. (In Russ.).

3. Kirilov A. A., Prasolov A.V., Smolyanitsky B. N., Sukhareva L. I. Experimental study of a shock system with a non-thrust impact. Physical and Technical Problems of Mineral Development. 1988;(2):67–72. (In Russ.).

4. Syryamin Yu. N., Smolyanitsky B. N., Boginsky V. P. On the choice of geometry of the wedge clamping mech anism. Physical and Technical Problems of Mineral Development. 1982;(3):99–101. (In Russ.).

5. Ebert G. A short guide to physics. Moscow: Fizmatgiz; 1963. 552 р. (In Russ.).

6. Anuryev V. I. The designer's handbook. Mechanical engineering. 9th ed. 2006. Vol. 1. 981 p. (In Russ.).

7. Kragelsky I. V., Vinogradova I. E. Coefficients of friction. Textbook. Moscow; 1962. 112 р. (In Russ.).

8. Kirillov A. A., Smolyanitskiy B. N., Sukhareva L. I. Modeling of the impact energy transfer through the lateral surface of the rod element. Proceedings of Siberian Branch of the Russian Academy of Sciences. Mining and Construc tion Vibration Machines and Processes. Novosibirsk; 1988. P. 18–24. (In Russ.).

9. Boginsky V. P., Smolyanitsky B. N. Pneumatic impact machines for immersion of light rod elements. Physical and Technical Problems of Mineral Development. 1981;(2):67–72. (In Russ.).

10. Kostylev A. D., Gurkov K. S., Smolyanitskiy B. N. Pneumatic punches and machines for driving light construc tion elements into the ground. Novosibirsk: Science, Siberian Branch; 1980. 48 p. (In Russ.).