CN202954814U - Shaping tool for coal planer - Google Patents

Abstract

The utility model relates to a coal plow used for mining thin coal seams underground in coal mines, in particular to a planing cutter used for the coal plow. During the coal mining process, the existing planing cutter will bear a large impact load when encountering the geological conditions of high coal hardness and incomplete coal seam stratification, which will cause the welding part of the alloy cutter head to open welding, causing the cutter The head falls off. The utility model is composed of a cutter body, a cylindrical alloy cutter head and an alloy cutter head. The groove of the alloy cutter head is an oblique dovetail hook groove. Parallel; the alloy cutter head is a ridge structure, the alloy cutter head is wide in the front and narrow in the rear, the two sides of the alloy cutter head are wedge-shaped, and the wedge angle is 3-7°; there is a cylindrical hole on the upper surface of the cutter body, and the cylindrical alloy cutter The head is embedded in a cylindrical hole on the upper surface of the cutter body. The structure of the utility model increases the contact area between the alloy cutter head and the cutter body, improves the stress on the brazing part of the alloy cutter head, and reduces the shedding of the cutter head.

Description

A planing cutter for a coal plow

technical field

The utility model relates to the technical field of coal plows used for mining thin coal seams in coal mines, in particular to a planing cutter used for coal plows.

Background technique

Existing coal plow cutters used for underground mining of coal mines will bear a large impact load during the coal mining process, especially when encountering geological conditions with high coal hardness and incomplete development of coal seam strata , resulting in open welding of the welding part of the alloy cutter head, repeated impacts, which can easily lead to the separation of the alloy cutter head and the cutter body in the cutter, making the cutter invalid, and due to the narrow space of the thin coal seam, maintenance operations are difficult, resulting in long downtime and affecting the thin coal seam mining efficiency.

Contents of the invention

The purpose of this utility model is to provide a planing tool for a coal plow to solve the problems of the cutter head falling off and fragmentation during the process of cutting the coal wall, especially the problem of cutter head falling off.

The technical solution adopted by the utility model is: the planing cutter is composed of a cutter body, an alloy cutter head, and a cylindrical alloy cutter head; In the seat, the cutter body is fixed on the planing tool seat by screwing into the square groove; the feature is that the alloy cutter head groove on the cutter body is an obliquely opened dovetail hook groove, and the bottom surface of the hook groove and the cutter body The front end surface M is parallel, the side of the hook groove is parallel to the upper surface N of the cutter body, and the angle α between the bottom surface of the hook groove and the side surface is 60-80°; Symmetrical ridge structure, the angle C ₁ between plane a and plane b and the horizontal plane is 5-20°; the alloy cutter head is wide in the front and narrow in the rear, the two sides are wedge-shaped, and the wedge angle C ₂ is 3-7°;

The upper surface N of the cutter body is provided with a cylindrical hole, and the cylindrical alloy cutter head is embedded in the cylindrical hole and fixed by copper-based brazing. The distance from the tip of the cylindrical alloy cutter head to the upper surface N is L ₁ .

Further, the distance L ₁ from the tip of the cylindrical alloy cutter head 2 on the cutter body 1 of the plow cutter to the upper surface N is 2-5 mm.

The utility model has the advantages that: after the cutter body adopts the inclined dovetail hook groove structure, the contact area between the alloy cutter head and the planing cutter body increases, which improves the stress at the brazing part of the alloy cutter head, During the process, it can withstand greater compressive stress, shear stress and impact load, reducing the loss of the cutter head. The cylindrical alloy cutter head is embedded in the upper surface of the cutter body to protect the upper surface of the cutter body. The tool has a simple structure, stable structure and low economic cost to increase the service life of the tool.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is the structural diagram of the coal plow planing tool described in the utility model;

Fig. 2 is the front view of the alloy cutter head in the utility model;

Fig. 3 is a side view of the alloy cutter head in the utility model;

Fig. 4 is the top view of the alloy cutter head in the utility model;

Fig. 5 is a structural diagram of the cutter body in the utility model.

In the picture: 1. Cutter body, 2. Cylindrical alloy cutter head, 3. Alloy cutter head, 4. Square groove.

Detailed ways

As shown in Figures 1 to 5, it includes a cutter body 1, an alloy cutter head 3, and a cylindrical alloy cutter head 2; the alloy cutter head 3 is embedded in the groove of the cutter body 1 and welded together, and the lower end of the cutter body 1 is inserted into the planer. In the tool holder, the cutter body 1 is fixed on the planing tool holder through screw penetration into the square groove 4; it is characterized in that: the alloy cutter head 3 on the cutter body 1 is an inclined dovetail hook groove, The bottom surface of the hook groove is parallel to the front surface M of the cutter body 1, the side surface of the hook groove is parallel to the upper surface N of the cutter body 1, and the angle α between the bottom surface of the hook groove and the side surface is 60-80°; the upper surface of the alloy cutter head 3 is composed of a surface and b surface Intersect to form a symmetrical roof structure with high middle and low sides. The angle _C1 between plane a and plane b and the horizontal plane is 5-20°; _C2 is 3~7°;

The upper surface N of the cutter body 1 is provided with a cylindrical hole, and the cylindrical alloy cutter head 2 is embedded in the cylindrical hole and fixed by copper-based brazing. The distance from the tip of the cylindrical alloy cutter head 2 to the upper surface N is L ₁ .

The distance from the tip of the cylindrical alloy cutter head 2 on the cutter body 1 of the coal plow to the upper surface N is _L1 , which is 2 to 5 mm.

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. All the implementation manners cannot be exhaustively listed here. All obvious changes or variations derived from the technical solutions of the utility model are still within the scope of protection of the utility model.

Claims (2)

1. A planing cutter for a coal plow, comprising a cutter body (1), a cylindrical alloy cutter head (2) and an alloy cutter head (3); the alloy cutter head (3) is embedded in the cutter body (1) The lower end of the cutter body (1) is inserted into the planing tool holder, and the cutter body (1) penetrates the square groove (4) through a screw to fix the cutter body (1) on the planing tool holder; It is characterized in that: the groove of the alloy cutter head (3) on the cutter body (1) is an obliquely opened dovetail hook groove, the bottom surface of the hook groove is parallel to the front surface M of the cutter body (1), and the side surface of the hook groove is parallel to the front surface M of the cutter body (1). ) The upper surface N is parallel, and the angle α between the bottom surface of the hook groove and the side surface is 60-80°; The angle C ₁ between the surface b and the horizontal plane is 5-20°; the alloy cutter head (3) is in the shape of wide front and narrow rear, the two sides are wedge-shaped, and the wedge angle C ₂ is 3-7°; The upper surface N of the cutter body (1) is provided with a cylindrical hole, the cylindrical alloy cutter head (2) is embedded in the cylindrical hole, and fixed by copper-based brazing, and the tip of the cylindrical alloy cutter head (2) reaches the upper surface N The distance is L ₁ . 2. A kind of planing cutter for coal plow according to claim 1, characterized in that: the tip of the cylindrical alloy cutter head (2) on the cutter body (1) of the planing cutter The distance _L1 to the upper surface N is 2 to 5 mm.

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