Hard alloy tapper

Abstract

The utility model relates to the technical field of tappers, and discloses a hard alloy tapper which comprises a connector, a tapper body is fixedly installed at one end of the connector, a plurality of saw teeth are fixedly installed at the opening end of the tapper body, the saw teeth are arranged in an annular array mode, and the saw teeth are made of hard alloy. A first alloy blade head is fixedly mounted at one end of each of part of the saw teeth, and a second alloy blade head is fixedly mounted at one end of each of the other part of the saw teeth; the saw teeth, the first alloy blade head and the second alloy blade head are arranged, the saw teeth are installed on the tapper body, then the first alloy blade head and the second alloy blade head are installed on the saw teeth, the first alloy blade head is matched with the second alloy blade head so that the cutting efficiency can be higher, and meanwhile the service life of the alloy blade heads can be prolonged; therefore, the sawtooth part of the tapper is more wear-resistant, and the tapping efficiency is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to a hole opener technical field especially relates to a hard alloy hole opener. BACKGROUND

[0002] The hole opener is a special circular saw for processing circular holes. It is simple to operate, safe to carry and widely used. Its accessories mainly include supporting handle, spring, drill bit, etc. It can be classified according to diameter type (fixed diameter and variable diameter), material (bimetal, hard alloy, diamond, etc.), use scene and object (metal, pipeline, plastic, inspection well, etc.). It is usually installed on a power tool such as a hand drill and used to cut circular holes, square holes and other shapes of holes on the plane, spherical surface and other arbitrary curved surfaces of various materials, and is applied in many fields such as building fire protection, electrical installation, decoration, etc.

[0003] The hole opener disclosed in the Chinese utility model patent with publication number CN219274578U has the effect of improving the service life of the hole opener, but the existing hard alloy hole opener has a tooth shape of left and right chamfer or full ladder tooth, and the hole opening efficiency and service life are general, and the hard alloy metal hole opener is used for non-metal material hole opening, although the service life is improved, but the efficiency is low, and there is no hole opener that can effectively hole open two kinds of materials of metal material and non-metal material. CONTENT OF THE UTILITY MODEL

[0004] To solve the above technical problems, the utility model provides a hard alloy hole opener.

[0005] The utility model adopts the following technical scheme: a hard alloy hole opener, including the connecting head, the one end fixed mounting of connecting head has the hole opener body, the fixed mounting of a plurality of sawtooth teeth on the opening end of hole opener body, a plurality of sawtooth teeth are arranged in annular array, and the one end of part sawtooth teeth is all fixedly installed with first alloy blade head, and the one end of another part sawtooth teeth is all fixedly installed with second alloy blade head.

[0006] Through the above technical scheme, the sawtooth tooth is installed on the hole opener body, and then the first alloy blade head and the second alloy blade head are installed on the sawtooth tooth, and the first alloy blade head cooperates with the second alloy blade head to make the cutting efficiency higher, and also can improve the service life of alloy blade head.

[0007] As a further improvement of the above scheme, the first alloy blade head and the second alloy blade head are alternately arranged.

[0008] Through the above technical scheme, the first alloy blade head and the second alloy blade head are alternately designed, so that the sawtooth part of the hole opener is more wear-resistant, thereby improving the service life and the hole opening efficiency is faster.

[0009] As a further improvement of the above-mentioned scheme, the first alloy blade head is all trapezoidal alloy blade head, and the second alloy blade head is all flat alloy blade head.

[0010] Through the above technical scheme, the structure of the trapezoidal tooth makes the force on the blade head more reasonable in the cutting process. When encountering hard material or uneven cutting resistance, the shape of the trapezoidal tooth can better disperse stress, so that the service life is longer. The flat tooth can provide a more uniform cutting depth when opening a hole. Because each tooth blade of the flat tooth is basically on the same plane, the edge of the opening hole can be made more flat during the cutting process.

[0011] As a further improvement of the above-mentioned scheme, the first alloy blade head is all inner pointed tooth blade head, and the second alloy blade head is all outer pointed tooth blade head.

[0012] Through the above technical scheme, because the cutting force is uniformly distributed on each blade head, the pressure borne by each blade head is relatively small, and the wear is more uniform. Compared with the wear mode concentrated on several blade heads, the design of the staggered pointed blade head can prolong the service life of the entire alloy blade head, reduce the replacement frequency of the blade head, and reduce the use cost.

[0013] As a further improvement of the above-mentioned scheme, a plurality of scrap openings are arranged in a ring array on the cylindrical surface of the hole opener body and penetrate through the hole opener body.

[0014] Through the above technical scheme, when drilling a workpiece, the waste generated by drilling is discharged from the scrap opening, avoiding the accumulation of scrap inside the hole opener body.

[0015] As a further improvement of the above-mentioned scheme, the hole opener body is provided with a heat dissipation hole near the side of the connecting head.

[0016] Through the above technical scheme, the heat dissipation hole can improve the heat dissipation effect of the hole opener body.

[0017] Compared with the prior art, the beneficial effects of the utility model lie in:

[0018] The utility model discloses a sawtooth tooth, first alloy blade head and second alloy blade head are set up, and the sawtooth tooth is installed on the hole opener body, and then the first alloy blade head and the second alloy blade head are installed on the sawtooth tooth, and the first alloy blade head cooperates with the second alloy blade head to make the cutting efficiency higher, and also can improve the service life of the alloy blade head, make the hole opener sawtooth part more wear -resisting, and the hole opening efficiency is faster. ACCURATE DRAWING

[0019] Figure 1 It is three-dimensional structure schematic view of the utility model;

[0020] Figure 2 It is the utility modelFigure 1 side view of the utility model;

[0021] Figure 3 the utility model Figure 1 enlarged view of A part structure of the utility model;

[0022] Figure 4 structure diagram of the utility model inner tine blade head and outer tine blade head.

[0023] Figure 5 sectional view of the utility model inner tine blade head and outer tine blade head.

[0024] Main symbol explanation:

[0025] 1, connecting head, 2, hole opener body, 3, sawtooth tooth, 4, first alloy blade head, 5, second alloy blade head, 6, scrap opening, 7, heat dissipation hole. Specific implementation

[0026] Next, the utility model is further described in combination with the drawings and specific implementation, and it should be explained that, under the premise of not conflicting, the following described each embodiment or each technical feature between can be combined to form new embodiment.

[0027] Example one:

[0028] Please combine Figures 1-5 , a hard alloy hole opener of the embodiment, including connecting head 1, the one end of connecting head 1 is fixedly installed with hole opener body 2, the opening end of hole opener body 2 is fixedly installed with multiple sawtooth teeth 3, multiple sawtooth teeth 3 are arranged in annular array, the one end of part sawtooth tooth 3 is fixedly installed with first alloy blade head 4, and the one end of another part sawtooth tooth 3 is fixedly installed with second alloy blade head 5, and first alloy blade head 4 and second alloy blade head 5 are alternately arranged.

[0029] Sawtooth tooth 3 is installed on hole opener body 2, and then first alloy blade head 4 and second alloy blade head 5 are installed on sawtooth tooth 3, and first alloy blade head 4 cooperates second alloy blade head 5 to make cutting efficiency higher, and also can improve the service life of alloy blade head.

[0030] Example two:

[0031] Please combine Figures 1-3 , first alloy blade head 4 is all trapezoidal alloy blade head, and second alloy blade head 5 is all planar alloy blade head.

[0032] The trapezoidal tooth structure makes the blade head force more reasonable during cutting. When encountering hard materials or uneven cutting resistance, the trapezoidal tooth shape can better disperse stress, prolong service life, and the flat tooth can provide a more uniform cutting depth when drilling. Because each tooth blade of the flat tooth is basically in the same plane, the edge of the hole drilled during cutting can be made more smooth.

[0033] Embodiment three:

[0034] Please refer to Figure 4 and Figure 5 , the first alloy blade head 4 is an inner pointed tooth blade head, and the second alloy blade head 5 is an outer pointed tooth blade head.

[0035] Because the cutting force is uniformly distributed on each blade head, the pressure on each blade head is relatively small, and the wear is more uniform. Compared with the wear mode concentrated on several blade heads, the staggered pointed blade head design can prolong the service life of the entire alloy blade head, reduce the replacement frequency of the blade head, reduce the use cost, and the staggered blade head can also make the cutting force uniformly distributed on the circumference, reduce the vibration and swing during cutting, which helps to maintain the accuracy of the hole, makes the edge of the hole more smooth and neat, and reduces the roughness and deviation of the hole wall.

[0036] A plurality of scrap openings 6 are arranged in a ring array and penetrate the self on the cylindrical surface of the hole opener body 2. The hole opener body 2 is provided with a heat dissipation hole 7 near the connecting head 1.

[0037] When drilling the workpiece, the waste produced by drilling is discharged from the scrap opening 6, avoiding the accumulation of scrap inside the hole opener body 2.

[0038] The implementation principle of the hard alloy hole opener in the embodiment is: when drilling metal materials, the first alloy blade head 4 is a trapezoidal alloy blade head, and the second alloy blade head 5 is a flat alloy blade head. The first alloy blade head 4 and the second alloy blade head 5 are alternately arranged, and one trapezoidal alloy blade head and one flat alloy blade head form a group of alternating grinding. The trapezoidal alloy blade head and the flat alloy blade head have a jump range of 0.10-0.25 mm, the trapezoidal alloy blade head has a rake angle range of 5-25 degrees, a relief angle range of 10-20 degrees, and a bevel range of 30-45 degrees. The tooth shape can realize higher service life and drilling efficiency than similar hole openers on the market.

[0039] When the non-metallic material is drilled, the first alloy blade head 4 is an inner tooth alloy blade head, the second alloy blade head 5 is an outer tooth alloy blade head, the first alloy blade head 4 and the second alloy blade head 5 are alternately arranged, one outer tooth alloy blade head and one inner tooth alloy blade head are taken as one group of alternately ground, the tooth tips of the alternately arranged teeth are in the same plane, the range of the front angle of the alternately arranged teeth is between 2-25 degrees, the range of the back angle is between 10-20 degrees, the range of the top bevel of the alternately arranged teeth is between 5-20 degrees, and the range of the surface bevel of the alternately arranged teeth is between 5-20 degrees, so that the service life and the drilling efficiency of the drilling device are higher than those of the same drilling device on the market.

[0040] The above-mentioned embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and replacements made by those skilled in the art on the basis of the present application belong to the scope of protection of the present application.

Claims

1. A hard metal reamer comprising a connecting head (1), characterized in that One end of the connecting head (1) is fixedly installed with an opening body (2), a plurality of sawtooth teeth (3) are fixedly installed on the opening end of the opening body (2), a plurality of the sawtooth teeth (3) are arranged in a ring array, one end of part of the sawtooth teeth (3) is fixedly installed with a first alloy blade head (4), and one end of another part of the sawtooth teeth (3) is fixedly installed with a second alloy blade head (5).

2. A carbide hole opener as claimed in claim 1, characterized in that The first alloy blade head (4) and the second alloy blade head (5) are alternately arranged.

3. A carbide hole opener as claimed in claim 2, characterized in that The first alloy blade head (4) is a trapezoidal alloy blade head, and the second alloy blade head (5) is a planar alloy blade head.

4. A carbide hole opener as claimed in claim 2, characterized in that The first alloy blade head (4) is an inner tine blade head, and the second alloy blade head (5) is an outer tine blade head.

5. A carbide hole opener as claimed in claim 1, characterized in that A plurality of scrap openings (6) are arranged in a ring array on the cylindrical surface of the opening body (2) and penetrate through the opening body (2).

6. A carbide hole opener as claimed in claim 1, characterized in that A heat dissipation hole (7) is formed on the side of the opening body (2) close to the connecting head (1).

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