No abstract

The article is devoted to the issue of automatic adjustment of the drilling machine to operating modes close to optimal. Information about the method of automatic control of the rotational drilling process is provided. The essence of the method consists in a special design of the drive, in which the work of the hydraulic motor and the hydraulic cylinder are connected through the working process. As a result of this connection of hydraulic elements, the torque of rotation on the hydraulic motor controls the feed of the hydraulic cylinder. Tuning throttles provide adjustment of modes to the required range of drilling conditions. Depending on the strength of the rock being drilled and the operating conditions of the drilling machine, the drive automatically changes the feed rate, thus ensuring maximum productivity. Several variations of this adaptive drive of the drilling machine are described. A description of the authors development, the drive scheme, and a description of the principle of operation is given. The advantages of the adaptive drive and its disadvantages are shown.

No abstract

Examples of the development and application of mechanisms and machines endowed with the properties of self-adjustment (adaptation) to changing operating conditions, in particular machines for mining operations, are presented. It is shown that adaptive mechanisms and machines have a number of advantages in variable operating conditions. At the same time, the area of knowledge on the creation and use of adaptive machines and mechanisms to date, remains poorly understood. The purpose of the work is to present the concept of adaptation of mechanisms and machines to operating conditions, the Executive bodies of which work with variable loads. The results of the paper can be useful for machines and mechanisms design with self-adjusting and self-regulating characteristics. Adaptive mining tunneling, drilling machines and adaptive cutting tools reveal the concept of adaptive machines and mechanisms characteristics to changing operating conditions. The principle of operation of an adaptive drilling machine designed for drilling operations is described. It is shown that the feedback between the torque of the resistance to rotation on the drill rod and the force of the rod feeding on the face is carried out through the force-torque connections with the optional use of electronic automation tools.

No abstract