A center drill for assisting in the machining of a drill bit

Abstract

The application relates to the field of drilling, in particular to a center drill for assisting drill bit machining, wherein the center drill for assisting drill bit machining comprises a first extension part and two positioning parts, the two positioning parts are located at two ends of the first extension part and are connected with the first extension part, and each first extension part is provided with a tip, the tip has a cross-section width of 3.82 and a length of 2.19. The center drill can effectively utilize the structural configuration to realize the advantages that when a 3.8 drill bit is machined, the tip of the drill bit can first touch the centering tip of the center drill, and the drill bit machining deviation can be prevented.

Description

Technical Field

[0001] This application relates to the field of drilling, and more specifically to a center drill for assisting in the machining of drill bits. Background Technology

[0002] The existing center drill structure that mates with a 3.8-size drill bit is as follows: Figure 4 As shown, it has a head with radial and length dimensions of 3.0 and 4, respectively, and an angle of 119°. However, in practical use, the existing center drill design suffers from a relatively long front end and a small angle, making the head prone to breakage during machining. Furthermore, the 119° angle at the front end does not match the 135° angle at the drill bit's tip, meaning the drill bit initially contacts the side cutting edges instead of the drill bit itself, leading to potential deviation during machining and easy wear of the side cutting edges. Therefore, to address these issues, it is necessary to improve the structure of the existing center drill. A center drill that prioritizes the drill tip contacting the center drill's centering tip during machining, thus preventing deviation, is essential. Summary of the Invention

[0003] The main objective of this application is to provide a center drill for auxiliary drill bit processing, wherein the center drill for auxiliary drill bit processing can effectively utilize its own structural configuration to ensure that the drill tip of the 3.8 drill bit first contacts the center drill tip for centering during processing, thereby preventing the drill bit from deviating during processing.

[0004] Another objective of this application is to provide a center drill for auxiliary drill bit processing, wherein the center drill for auxiliary drill bit processing includes: a first extension and two positioning parts, the two positioning parts being located at both ends of the first extension and both being connected to the first extension, and each of the first extensions having a tip with a cross-sectional width of 3.82 and a length of 2.19, wherein the defects of existing center drills are solved by optimizing the size of the existing head.

[0005] Another objective of this application is to provide a center drill for auxiliary drill bit processing, wherein the center drill for auxiliary drill bit processing has a simple structure, is easy to operate, does not involve complex manufacturing processes and expensive materials, has high economic efficiency, and is easy to promote and use.

[0006] To achieve at least one of the above-mentioned utility model objectives, this application provides a center drill for auxiliary drill bit processing, wherein the center drill for auxiliary drill bit processing comprises: The device comprises a first extension and two positioning portions, the two positioning portions being located at both ends of the first extension and connected to the first extension, and each of the first extensions having a tip with a cross-sectional width of 3.82 mm and a length of 2.19 mm.

[0007] In one or more embodiments of this application, the two first extensions and the positioning portion are integrally formed.

[0008] In one or more embodiments of this application, each of the positioning portions further includes a second extension and a third extension, the tip being connected to the second extension, the end of the second extension away from the tip being connected to the third extension, and the end of the third extension away from the second extension being connected to the first extension.

[0009] In one or more embodiments of this application, the angle of the tip is 140°.

[0010] In one or more embodiments of this application, each of the positioning portions has two oppositely disposed notches.

[0011] In one or more embodiments of this application, one end of the notch is located at the tip, and the other end is located on the wall surface of the first extension near the third extension.

[0012] In one or more embodiments of this application, the wall surface forming the notch and near the tip also has a guide bevel. Attached Figure Description

[0013] These and / or other aspects and advantages of this application will become clearer and more readily understood from the following detailed description of embodiments of this application taken in conjunction with the accompanying drawings, wherein: Figure 1 The figure shows a schematic diagram of a center drill that assists in the machining of drill bits.

[0014] Figure 2 The figure shows a schematic diagram of the end face structure of a center drill used for auxiliary drill bit processing.

[0015] Figure 3 The figure shows a partial structural diagram of an auxiliary drill bit machining process. Figure 4 The diagram illustrates the structure of an existing center drill. Detailed Implementation

[0016] The terms and words used in the following description and claims are not limited to their literal meaning, but are used solely by the person skilled in the art to enable a clear and consistent understanding of this application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of this application is provided for illustrative purposes only and not for the purpose of limiting the application as defined in the appended claims and their equivalents.

[0017] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0018] While ordinal numbers such as "first," "second," etc., will be used to describe various components, there is no limitation on which components are used herein. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component, without departing from the teachings of the utility model concept. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0019] The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. It will also be understood that the terms “comprising” and / or “having” as used in this specification specify the presence of the described features, numbers, steps, operations, components, elements or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements or groups thereof.

[0020] refer to Figures 1 to 3 According to a preferred embodiment of the present invention, the center drill for auxiliary drill bit processing is described as follows: Figure 1 As shown, it includes a drill bit body, the structure of which is as follows: Figure 1 As shown, it has a dual-head structure, which includes a first extension 10 and a positioning part 20. The two ends of the first extension 10 are respectively connected to the two positioning parts 20. Specifically, the first extension 10 and the positioning part 20 are integrally formed.

[0021] It should also be noted that the positioning part 20 is configured to initially position the surface of the workpiece to facilitate subsequent drill bit processing. The advantage of this application is that it allows the drill tip to preferentially contact the center drill tip during processing, preventing drill bit deviation. Specifically, the positioning part 20 has a tip 21, a second extension 22, and a third extension 23. The tip 21 is connected to the second extension 22, the end of the second extension 22 opposite to the tip 21 is connected to the third extension 23, and the end of the third extension 23 opposite to the second extension 22 is connected to the first extension 10. Furthermore, when the drill bit is a 3.8mm diameter drill bit, the tip 21 is 3.82mm in size and 2.19mm in length. This tip 21 design improves the drilling of the positioning hole, and the 3.8mm diameter drill bit mates with the machined positioning hole for drilling. Specifically, when drilling with a 3.8mm drill bit, the existing center drill has a tip 21 of 3.8mm and a length of 4.0mm, with an angle of 119°. The problem with this tip 21 design is that the front end is too long and the angle is too small, making the tip prone to breakage during machining. Furthermore, the 119° angle at the front end does not match the 135° angle at the drill bit's front end, meaning the drill bit initially contacts the side cutting edges instead of the drill bit itself, leading to potential deviation during machining and wear on the side cutting edges. This application addresses this issue by changing the angle of tip 21 to 140°.

[0022] It is worth mentioning that each of the positioning parts 20 has two oppositely arranged notches 201, and its structure is as follows: Figure 2 As shown, the notch 201 is implemented as a chip removal groove, which serves to remove chips during center drilling. Additionally, the wall surface forming the notch 201 and near the tip 21 also has a guide slope 2011. This guide slope 2011 facilitates the positioning of the tip 21 on the workpiece surface. Furthermore, the outer wall of the tip 21 also has a groove structure 2101, the specific structure of which is as follows... Figure 3 As shown.

[0023] In summary, the center drill for auxiliary drill bit processing described in the embodiments of this application is explained, which provides advantages such as enabling the drill tip of the 3.8 drill bit to preferentially contact the center drill for centering during processing and preventing drill bit deviation.

[0024] It is worth mentioning that, in the embodiments of this application, the center drill structure for auxiliary drill bit processing is simple, does not involve complex manufacturing processes or expensive materials, and has high economic efficiency. At the same time, for manufacturers, the center drill for auxiliary drill bit processing provided in this application is easy to produce and inexpensive, which is more conducive to controlling production costs and further facilitates product promotion and use.

[0025] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The function and structural principle of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from these principles.

Claims

1. A center drill for assisting in drill bit processing, characterized in that, The center drill for auxiliary drill bit processing includes: The device comprises a first extension and two positioning portions, the two positioning portions being located at both ends of the first extension and connected to the first extension, and each of the first extensions having a tip with a cross-sectional width of 3.82 mm and a length of 2.19 mm.

2. The center drill for auxiliary drill bit processing according to claim 1, wherein the two first extensions and the positioning portion are integrally formed.

3. The center drill for auxiliary drill bit processing according to claim 1, wherein each of the positioning portions further comprises a second extension portion and a third extension portion, the tip portion being connected to the second extension portion, the end of the second extension portion opposite to the tip portion being connected to the third extension portion, and the end of the third extension portion opposite to the second extension portion being connected to the first extension portion.

4. The center drill for auxiliary drill bit processing according to claim 1, wherein the angle of the tip is 140°.

5. The center drill for auxiliary drill bit processing according to claim 3, wherein each of the positioning portions has two oppositely arranged notches.

6. The center drill for auxiliary drill bit processing according to claim 5, wherein one end of the notch is located at the tip and the other end is located on the wall surface of the first extension near the third extension.

7. The center drill for auxiliary drill bit processing according to claim 6, wherein the wall surface forming the notch and near the tip further has a guide bevel.

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