Novel U-shaped drill

Abstract

The utility model discloses a novel U drill, which belongs to the technical field of cutter processing, and comprises a cutter body, a blade and a screw, the end part of the cutter body is provided with a mounting hole I, a cutter pad is arranged in the mounting hole I, a threaded hole is arranged in the cutter pad, the blade is provided with a mounting hole II, and the screw penetrates through the blade and is in threaded connection with the threaded hole. The cutter is divided into a cutter body and a cutter pad, a screw is screwed on the cutter pad through a threaded hole, a blade is fastened on the cutter body through screwing matching of the screw and the cutter pad, the material hardness of the cutter pad is far smaller than that of the cutter body, the cutter pad is made of a material with low hardness, the threaded hole is machined in the cutter pad, machining of the threaded hole is facilitated, and machining efficiency is improved. The cutter body is made of materials with high hardness, rigidity is guaranteed, only the mounting hole is machined, and machining difficulty of the cutter body is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of cutter processing, especially a novel U drill. BACKGROUND

[0002] At present, in the mechanical processing, the common processing mode of drilling is cutter drilling processing, wherein the U drill is widely used as a high-efficiency hole processing cutter.

[0003] For the above-mentioned related technology, the applicant finds that the U drill belongs to a rough machining cutter, and the removal rate of iron filings during drilling is very high, which also means that the U drill cutter body needs to bear greater torque. In order to make the U drill cutter body bear greater torque, the rigidity of the U drill cutter body needs to be improved, and the most direct method is to improve the hardness of the cutter body. Since two alloy blades on the cutter body are fixed by screws, the machining of the threaded hole is very difficult due to the too high hardness of the cutter body, greatly improving the machining difficulty of the cutter body. SUMMARY

[0004] The utility model discloses a novel U drill in view of the deficiency of prior art, and is divided into two parts of cutter body and cutter pad, the cutter pad uses the material with lower hardness, the threaded hole is processed on the cutter pad, the machining of the threaded hole is facilitated, the cutter body uses the material with higher hardness, ensures rigidity and only processes the mounting hole, and the machining difficulty of the cutter body is greatly reduced.

[0005] The utility model solves the technical scheme of the above-mentioned technical problem as follows:

[0006] A novel U drill, comprising a cutter body, a blade and a screw, an installation hole one is formed at the end position of the cutter body, a cutter pad is arranged in the installation hole one, a threaded hole is formed in the cutter pad, the blade is provided with an installation hole two, and the screw is screwed through the blade and is screwed with the threaded hole.

[0007] By adopting the above technical scheme, the cutter body and the cutter pad are divided into two parts, the screw is screwed on the cutter pad through the threaded hole, the blade is fastened on the cutter body through the screwing cooperation of the screw and the cutter pad, the material hardness of the cutter pad is far less than that of the cutter body, the cutter pad uses the material with lower hardness, the threaded hole is processed on the cutter pad, the machining of the threaded hole is facilitated, the cutter body uses the material with higher hardness, ensures rigidity and only processes the installation hole, and the machining difficulty of the cutter body is greatly reduced.

[0008] Further, one end of the cutter pad close to the blade is provided with a conical surface, one end of the installation hole one close to the blade is provided with a conical surface, and the conical surface of the cutter pad and the conical surface of the installation hole one are matched with each other.

[0009] By adopting the technical scheme, the cutter pad is arranged in the mounting hole one by the contact of the conical surface, the position of the cutter pad in the mounting hole one is limited, the cutter pad is prevented from being pulled out from the side of the mounting hole one close to the blade, the blade is better fastened, and the position tolerance of the screw thread is ensured.

[0010] Further, the cutter pad is in a cylindrical shape, the maximum outer diameter of the cutter pad is less than or equal to the maximum inner diameter of the mounting hole one, and the maximum outer diameter of the cutter pad is greater than the minimum inner diameter of the mounting hole one.

[0011] By adopting the technical scheme, the maximum outer diameter of the cutter pad is less than or equal to the maximum inner diameter of the mounting hole one, the shape and size of the cutter pad are slightly smaller than those of the mounting hole one, the cutter pad is conveniently arranged in the mounting hole one, the maximum outer diameter of the cutter pad is greater than the minimum inner diameter of the mounting hole one, and the position of the cutter pad in the mounting hole one is further limited.

[0012] Further, the end of the mounting hole two close to the cutter pad is arranged in a conical surface, the end of the screw close to the blade is arranged in a conical surface, and the conical surface of the screw and the conical surface of the mounting hole two are matched with each other.

[0013] By adopting the technical scheme, the screw is arranged in the mounting hole two by the contact of the conical surface, the position of the screw in the mounting hole two is limited, the screw is prevented from being pulled out from the side of the mounting hole two close to the blade body, the blade is better fastened, and the position tolerance of the screw thread is ensured.

[0014] Further, the maximum outer diameter of the screw is less than or equal to the maximum inner diameter of the mounting hole two, and the maximum outer diameter of the screw is greater than the minimum inner diameter of the mounting hole two.

[0015] By adopting the technical scheme, the maximum outer diameter of the screw is less than or equal to the maximum inner diameter of the mounting hole two, the shape and size of the screw are slightly smaller than those of the mounting hole two, the screw is conveniently arranged in the mounting hole two, the maximum outer diameter of the screw is greater than the minimum inner diameter of the mounting hole two, and the position of the screw in the mounting hole two is further limited.

[0016] Further, the end of the blade body away from the blade is provided with a mounting portion.

[0017] By adopting the technical scheme, the mounting portion facilitates the better cooperation of the blade body with the drilling tool, and improves the universal adaptability of the blade body.

[0018] Compared with the prior art, the beneficial effects of the technical scheme are as follows:

[0019] (1) is divided into two parts of cutter body and cutter pad, screw is screwed on cutter pad through screw hole, cutter blade is fastened on cutter body through screwing cooperation of screw and cutter pad, because material hardness of cutter pad is far less than material hardness of cutter body, cutter pad uses material with lower hardness, screw hole is processed on cutter pad, processing of screw hole is facilitated, cutter body uses material with higher hardness, rigidity is ensured and only mounting hole is processed, processing difficulty of cutter body is greatly reduced;

[0020] (2) through the contact setting of the taper surface, the cutter pad is placed in the mounting hole one, the position of the cutter pad in the mounting hole one is limited, the cutter pad is prevented from being pulled out from the side of the mounting hole one close to the cutter blade, the function of better fastening the cutter blade is played, and the position degree of the screw thread can also be ensured;

[0021] (3) through the contact setting of the taper surface, the screw is placed in the mounting hole two, the position of the screw in the mounting hole two is limited, the screw is prevented from being pulled out from the side of the mounting hole two close to the cutter body, the function of better fastening the cutter blade is played, and the position degree of the screw thread can also be ensured;

[0022] (4) the installation part facilitates the cutter body to better cooperate with the drilling tool, and improves the universal adaptability of the cutter body. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the overall structure schematic view of the cutter body in the embodiment of the utility model;

[0024] Figure 2 It is the sectional view of the connection structure of the cutter body, the cutter blade and the cutter pad in the embodiment of the utility model;

[0025] Figure 3 It is the sectional view of the cutter pad in the embodiment of the utility model.

[0026] The figure mark explanation: 1, cutter body; 11, mounting hole one; 2, cutter blade; 21, mounting hole two; 3, screw; 4, cutter pad; 41, screw hole; 5, installation part. DETAILED DESCRIPTION

[0027] The principle and characteristics of the utility model are described below in combination with all the drawings, and the examples are only used to explain the utility model and are not used to limit the scope of the utility model.

[0028] The embodiment of the utility model discloses a novel U drill.

[0029] Referring to Figure 1 and Figure 2 A novel U drill, comprising a cutter body 1, a cutter blade 2 and a screw 3, the end position of the cutter body 1 is provided with a mounting hole one 11, the mounting hole one 11 is provided with a cutter pad 4, and the material hardness of the cutter pad 4 is far less than the material hardness of the cutter body 1.

[0030] With reference to Figure 2 and Figure 3 , the tool pad 4 is provided with a threaded hole 41, the blade 2 is provided with a mounting hole two 21, and the screw 3 passes through the blade 2 and is screwed with the threaded hole 41. The screw 3 is tightened on the tool pad 4 through the threaded hole 41, and the blade 2 is fastened on the tool body 1 through the screwing cooperation of the screw 3 and the tool pad 4. The tool pad 4 uses a material with lower hardness, the threaded hole 41 is processed on the tool pad 4, which further facilitates the processing of the threaded hole 41, while the tool body 1 uses a material with higher hardness, which ensures the rigidity and only processes the mounting hole, greatly reducing the processing difficulty of the tool body 1.

[0031] With reference to Figure 1 and Figure 2 , the tool pad 4 is preferably cylindrical, one end of the tool pad 4 close to the blade 2 is provided with a conical surface, one end of the mounting hole one 11 close to the blade 2 is provided with a conical surface, and the conical surface of the tool pad 4 and the conical surface of the mounting hole one 11 are adapted to each other. By the contact of the conical surfaces, the tool pad 4 is placed in the mounting hole one 11, the position of the tool pad 4 in the mounting hole one 11 is limited, the tool pad 4 is prevented from being pulled out from the side of the mounting hole one 11 close to the blade 2, which plays a better role in fastening the blade 2, and also ensures the position tolerance of the screw.

[0032] With reference to Figure 2 , the maximum outer diameter of the tool pad 4 is less than or equal to the maximum inner diameter of the mounting hole one 11, and the shape and size of the tool pad 4 are slightly smaller than the shape and size of the mounting hole one 11, which facilitates the placement of the tool pad 4 in the mounting hole one 11, while the maximum outer diameter of the tool pad 4 is greater than the minimum inner diameter of the mounting hole one 11, which further limits the position of the tool pad 4 in the mounting hole one 11.

[0033] With reference to Figure 2 , one end of the mounting hole two 21 close to the tool pad 4 is provided with a conical surface, one end of the screw 3 close to the blade 2 is provided with a conical surface, and the conical surface of the screw 3 and the conical surface of the mounting hole two 21 are adapted to each other. By the contact of the conical surfaces, the screw 3 is placed in the mounting hole two 21, the position of the screw 3 in the mounting hole two 21 is limited, the screw 3 is prevented from being pulled out from the side of the mounting hole two 21 close to the tool body 1, which plays a better role in fastening the blade 2, and also ensures the position tolerance of the screw.

[0034] With reference to Figure 2 , the maximum outer diameter of the screw 3 is less than or equal to the maximum inner diameter of the mounting hole two 21, and the shape and size of the screw 3 are slightly smaller than the shape and size of the mounting hole two 21, which facilitates the placement of the screw 3 in the mounting hole two 21, while the maximum outer diameter of the screw 3 is greater than the minimum inner diameter of the mounting hole two 21, which further limits the position of the screw 3 in the mounting hole two 21.

[0035] With reference to Figure 1The end of the cutter body 1 away from the blade 2 is provided with a mounting portion 5, which facilitates the cutter body 1 to better cooperate with a drilling tool and improves the universal adaptability of the cutter body 1.

[0036] The implementation principle of the novel U drill is as follows:

[0037] First, the cutter pad 4 provided with a threaded hole 41 is placed in the mounting hole one 11 of the cutter body 1, and the position degree of the thread is well ensured through the contact between the mounting hole one 11 and the conical surface of the cutter pad 4.

[0038] Then, the screw 3 is passed through the mounting hole two 21 of the blade 2, and the screw 3 and the cutter pad 4 are connected through the threaded hole 41, and the pressure generated by the threaded connection between the screw 3 and the cutter pad 4 fixes the blade 2 on the cutter body 1.

[0039] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A new type of U-drill comprising a body (1), a blade (2) and a screw (3), characterized in that: The end position of the cutter body (1) is provided with a mounting hole one (11), the mounting hole one (11) is provided with a cutter pad (4), the cutter pad (4) is provided with a threaded hole (41), the cutter blade (2) is provided with a mounting hole two (21), the screw (3) passes through the cutter blade (2) and is threadedly connected with the threaded hole (41).

2. A new U-drill according to claim 1, characterized in that: The end of the cutter pad (4) close to the cutter blade (2) is provided with a conical surface, the end of the mounting hole one (11) close to the cutter blade (2) is provided with a conical surface, and the conical surface of the cutter pad (4) and the conical surface of the mounting hole one (11) are matched with each other.

3. A new U-drill according to claim 2, characterized in that: The cutter pad (4) is in a cylindrical shape, the maximum outer diameter of the cutter pad (4) is less than or equal to the maximum inner diameter of the mounting hole one (11), and the maximum outer diameter of the cutter pad (4) is greater than the minimum inner diameter of the mounting hole one (11).

4. A new U-drill according to claim 1, characterized in that: The end of the mounting hole two (21) close to the cutter pad (4) is provided with a conical surface, the end of the screw (3) close to the cutter blade (2) is provided with a conical surface, and the conical surface of the screw (3) and the conical surface of the mounting hole two (21) are matched with each other.

5. A new U-drill according to claim 4, characterized in that: The maximum outer diameter of the screw (3) is less than or equal to the maximum inner diameter of the mounting hole two (21), and the maximum outer diameter of the screw (3) is greater than the minimum inner diameter of the mounting hole two (21).

6. A new U-drill according to claim 1, characterized in that: The end of the cutter body (1) away from the cutter blade (2) is provided with a mounting portion (5).

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