Coal mining and engineering pick

Abstract

The invention relates to a pick for coal mining and engineering, which is composed of a main pick made of hard alloy and a pick body. the periphery of the main pick made of hard alloy on the pick body is provided with an auxiliary pick, the end of the auxiliary pick is a pick tip or pick blade which can participate the cutting work, which not only protects the pick body, but also greatly reduces the work resistance. The invention has good and reliable rotation performance, realizes the equal strength design of pick nip and pick body, and improves the explosion-preventing safety of coal mining work.

Description

technical field [0001] The invention relates to a pick for coal mining and engineering. Background technique [0002] The quality of the pick is directly related to the efficiency and cost of the mining and excavation work and the life of the mining and excavation equipment. In coal mining applications, picks should also minimize or eliminate the generation of sparks to improve production safety. In order to adapt to various working objects and improve the service life of pick picks in application, the products of major companies in the world are constantly making some structural improvements. These structural improvements mainly focus on improving the penetration force and life of the pick tip, and improving the wear resistance of the tooth head. [0003] So far, the structure of the pick pick can be roughly divided into three types (see figure 1 , figure 2 , image 3 ), although the structures of the three picks are different, more than 85% of the failure modes of th...

AI Technical Summary

Problems solved by technology

[0005] First, in order to arrange the wear-resistant body 4, the projected area 6 in the working direction of the pick body is increased, which increases the working resistance of the tool, which will cause the vibration of the machine equipment and increase the energy consumption in actual work

[0006] Second, the flat top surface of the cylindrical or conical wear-resistant body will also increase the working resistance, and the straight edge of the wear-resistant body will be impacted and broken during work, weakening its anti-wear effect

[0007] Third, the plan does not give a clear definition of the height and diameter ratio of the wear-resistant body 4. From the diagram, the height and diameter of the wear-resistant body 4 are relatively small, basically only protecting the metal matrix of the tool shoulder, However, in the use of the pick tool, the whole pick will be inserted into sand or materials, and the material will cause wear to the entire upper part of the pick. Loss of support, resulting in shedding, unable to protect the pick for a long time (see Figure 13 )

[0008] The technical solution with the patent No. 200610102129.9 is a wear-resistant engineering pick. Although the height of the wear-resistant body is increased and the life of the pick is prolonged; but the same as the technical solution of DE19821147A1, in order to arrange the wear-resistant body, it must be placed on the pick body. A large step appears on the top, which creates a huge resistance when the pick is working

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