CN2782908Y - Percussion bit for mine - Google Patents

Abstract

The utility model relates to a 1-shaped percussion bit for mines, which belongs to the field of the manufacturing technology of 1-shaped percussion bits for excavating mines. The utility model solves the technical problems that the abrasion of the entirety is not uniform, precious raw material is wasted, and welding strength is low when lamellar hard alloy is used normally or is scraped. The 1-shaped percussion bit for mines is composed of a trousers body of a 1-shaped percussion bit and a piece of lamellar hard alloy. The utility model is characterized in that a 1-shaped groove of the trousers body of a 1-shaped percussion bit is in a trumpet-shaped symmetrical structure. The lamellar hard alloy forms a symmetrical V-shaped groove with an angle, and the range of the angle is 170 to 176 DEG. The range of the angle of the 1-shaped groove is 190 to 184 DEG. The utility model increases the welding area between both sides of the lamellar hard alloy and the 1-shaped groove, and the welding strength is enhanced to make the abrasion rate of the working position of the lamellar hard alloy become uniform. Therefore, the precious primary material is saved. The design of the utility model is peculiar. The utility model is easy to be accepted by extensive users, and is suitable for multitudinous popularization and application.

Description

The mine mono-line bit

Technical field: the utility model belongs to the drilling tool technical field, particularly the mono-line bit manufacturing technology field of using in the mine is dug.

Background technology: mono-line bit is widely used in fields such as mine cutting, rock mining, and use amount is huge.Existing mono-line bit all is made up of bore bit trousers body and the carbide alloy in the word groove that is welded on its end, be plane contact between the both sides of carbide alloy and bottom and the flat recess, carbide alloy wearing and tearing in use mainly are at its both ends, therefore, the wearing and tearing shape after the use is curved, when mono-line bit normal abandonment, one word bottom portion of groove of bore bit still keeps certain thickness carbide alloy, the middle part is the thickest, and two-end part is the thinnest, causes raw-material unnecessary waste.

Summary of the invention: technical problem to be solved in the utility model provides that a kind of pars intermedia of a word groove that can overcome above-mentioned defective, mono-line bit trousers body is narrow, both ends are loose, narrow mine mono-line bit between the both sides, middle part of sheet carbide.Solve this technical problem the technical scheme of employing: the mine mono-line bit, be made of mono-line bit trousers body (1) and sheet carbide (2), the shape that it is characterized in that a word groove (3) of this mono-line bit trousers body (1) is that pars intermedia is narrow, loose trumpet-shaped symmetrical structure between the both sides at both ends; Be provided with the V-type groove (4) of the band angle that is symmetry between the pars intermedia both sides of this sheet carbide (2); One word groove (3) is complementary with the profile of sheet carbide (2); The V-type groove (4) of this sheet carbide (2) is along the horizontal inside V-type groove (4) of sheet carbide (2), and its angular range is 170 to 176 degree; The angular range of one word groove (3) of this mono-line bit trousers body (1) is 190 to 184 degree.The utility model compared with prior art has following advantage: 1. because the pars intermedia of sheet carbide is thinner than both ends, therefore reduced raw-material use, saved important alloy raw material resource; 2. because the both sides of sheet carbide pars intermedia concave, therefore, improve bonding area, also increased weld strength greatly; 3. since mono-line bit in wear process, its both ends are in main acting, the both ends of sheet alloy are thick than pars intermedia, therefore, both reached effective acting, make sheet carbide and mono-line bit trousers body keep same rate of depreciation again, the utility model had both been saved cost, also reduced the reconditioning difficulty after bore bit weares and teares.

Description of drawings: Fig. 1 is the schematic front view of the utility model mine with a kind of structure of mono-line bit; Fig. 2, Fig. 3 are respectively diagrammatic top view, the right views of a kind of structure of the present utility model.

The specific embodiment: now in conjunction with the accompanying drawings, elaborate embodiment of the present utility model.As accompanying drawing 1, Fig. 2, shown in Figure 3, the utility model mine mono-line bit is made of mono-line bit trousers body (1) and sheet carbide (2), and a word groove (3) of mono-line bit trousers body (1) is complementary with the profile of sheet carbide (2); In a word groove (3) of the mono-line bit trousers body (1) of mono-line bit, a word groove (3) of this bore bit trousers body (1) is the horn-like structure that is symmetry that two ends are loose, the middle part is narrow to sheet carbide (2) with high-frequency welding; The upper end of this sheet carbide (2) is circular arc, be beneficial to Drilling, the both sides of intermediate portion are the V-type groove (4) of the band angle of rule symmetry, and this groove (4) is the horizontal inside V-type groove (4) along sheet carbide (2), and its angular range is 170 to 176 degree; The angular range of a trumpet-shaped word groove (3) of mono-line bit trousers body (1) is 190 to 184 degree.Drill bit diameter scope of the present utility model is 28 to 46 millimeters.The process of mono-line bit trousers body of the present utility model (1) is as follows: by traditional milling process, on columniform bore bit blank, by with diameter vertical direction elder generation milling one cutter of the disk of cylinder, then, workpiece rotation 4 to 8 degree, milling one cutter is promptly left a required trumpet-shaped word groove (3) again.Because the both sides of the pars intermedia of sheet carbide (2) are provided with inside groove (4), keeping under the constant situation of sheet carbide (2) both ends thickness, the thickness of intermediate portion is reduced, like this, both reduced the raw-material waste of valuable carbide alloy, make sheet carbide (2) in use make full use of effective acting at its both ends again, reach sheet carbide (2) when normal abandonment, whole consistent wearing and tearing of bore bit scrapped; Simultaneously,, make a sheet carbide (2) and word groove (a 3) bonding area of mono-line bit trousers body (1) increase, improved the firm welding degree because sheet carbide (2) pars intermedia is provided with groove (4).The utility model mine by users are taken like a shot, is suitable for popularization in enormous quantities, application with the design uniqueness of mono-line bit.

Claims (3)

1, mine mono-line bit is made of mono-line bit trousers body (1) and sheet carbide (2), and the shape that it is characterized in that a word groove (3) of this mono-line bit trousers body (1) is that pars intermedia is narrow, loose trumpet-shaped symmetrical structure between the both sides at both ends; Be provided with the V-type groove (4) of the band angle that is symmetry between the pars intermedia both sides of this sheet carbide (2); One word groove (3) is complementary with the profile of sheet carbide (2).

2, mine according to claim 1 mono-line bit, the V-type groove (4) that it is characterized in that this sheet carbide (2) is along the horizontal inside V-type groove (4) of sheet carbide (2), its angular range is 170 to 176 degree.

3, mine according to claim 1 mono-line bit, the angular range that it is characterized in that a word groove (3) of this mono-line bit trousers body (1) are 190 to 184 degree.

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