Mechanism test method for rock breaking by single-tooth rotary cutting

Abstract

The invention discloses a single-tooth rotating cutting rock-breaking mechanism testing method, and the method comprises the steps: 1) determining a rotating radius r according to the type and size of a cutting teeth, and manufacturing a rock sample; 2) determining the rotating speed n of the cutting tooth according to a torque, rotating speed and angle sensor and a data collection system, and determining the cutting speed v of the cutting tooth; 3) adjusting a cutting thickness adjustment oil cylinder, determining the maximum cutting thickness hmax through a dividing ruler II, determining the instantaneous position (shown in the description) of the cutting tooth through the torque, rotating speed and angle sensor and the data collection system, and obtaining the instantaneous cutting thickness; 4) carrying out one-time complete cutting process, collecting a signal of a pressure sensor through the data collection system, obtaining a radial force Fr, collecting a torque signal T through the torque, rotating speed and angle sensor, and obtaining a current force Fc. The method is mainly used for the research of a single-cutting-tooth cutting crescent rock chip formation mechanism, the change rules of the cutting force and the radial force, and the impact on a cutting parameter from a cutting speed.

Description

technical field [0001] The invention relates to the field of research on the rock-breaking mechanism of picks, in particular to a test method for the rock-breaking mechanism of single-tooth rotary cutting. Background technique [0002] Due to its high efficiency and machine flexibility, mechanical cutting rock breaking has been widely used in mining and various underground engineering fields. The single-tooth rock-breaking mechanism is the basis for the design of cutters and rock-breaking machinery, as well as the basis for the evaluation and selection of the machine's rock-breaking ability, so it has attracted the attention of the industry. [0003] Literature Bilgin N, Demircin MA, Copur H, Balci C, Tuncdemir H, Akcin N. Dominantrock properties affecting the performance of conical picks and the comparison of some experimental and theoretical results. Int J Rock Mech Min Sci 2006; 43:139-156. The full-scale linear cutting test bench used can test parameters such as cutting...

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Problems solved by technology

The test benches disclosed in patents 201210421825.1, 201310341432.4, 201220584454.4, and patent 201020578699.7 are unable to study the cutting formation mechanism, cutting force and radial force of a single pick when cutting crescent-shaped coal rocks in terms of principle and test methods.

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