Novel twist drill

Abstract

The utility model discloses a novel twist drill, which relates to the technical field of machining tools, and is characterized by comprising a connecting column body and a cutting drill body which are integrally formed, a cutting drill bit and a spiral chip groove located in the peripheral side wall are arranged at the end of the cutting drill body, the spiral chip groove is provided with a plurality of chip removal branch sliding grooves, the chip removal branch sliding grooves extend from the end of the cutting drill body to one end of the connecting column body, and the depth and the width of the chip removal branch sliding grooves are synchronously reduced. When the cutting drill bit rotates to drill holes, chippings are discharged to the rear end through the spiral chip removal grooves, and centrifugal force formed by the chippings moves outwards through the chip removal branch sliding grooves in the rotating process, so that the purpose that the chippings are separated from the spiral chip removal grooves in order is achieved, and the service life of the chippings is prolonged. And the problems of abrasion caused by accumulation of chippings in the spiral chip groove and brittle failure caused by local high temperature are solved, so that the novel twist drill has the effects of improving the punching capacity and prolonging the service life.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical processing tool technical field more specifically, it relates to a novel twist drill. BACKGROUND

[0002] Twist drill is the tool that rotates cutting to drill the round hole of workpiece through its relative fixed axis, because its chip flute is helical and is similar to hemp flower, and is named, helical flute has double flute, three flute or more, but the double helical flute is most common, twist drill can be clamped in hand, electric hand -held type drilling tool or drill press, milling machine, lathe even machining center uses, usually used for punching workpiece.

[0003] The Chinese patent application file with the publication number CN105014128A discloses a new twist drill, the new twist drill includes the drill bit and the drill handle connected, one end of the drill handle is connected with the drill bit, the other end is provided with the installation deep hole, the inner wall of the installation deep hole is provided with the internal thread, the drill bit is provided with the spiral groove, a plurality of chip removal holes are arranged on the spiral groove.

[0004] But the new twist drill's drain hole adopts the purpose of realizing the chip removal that distributes on the spiral groove, however, because the waste chip is easy to block the drain hole, thereby leading to the difficulty of the effective chip removal of the drain hole, and further leading to the problem of the brittle fracture caused by the large wear and tear and local high temperature of the new twist drill, which needs to be improved. SUMMARY

[0005] In view of the deficiencies in the prior art, the utility model aims at providing a new twist drill, which has the effects of improving the punching capacity and prolonging the service life.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A new twist drill, comprising an integrally formed connecting column and a cutting drill body; the end of the cutting drill body is provided with a cutting drill bit and a spiral chip removal groove on the outer peripheral sidewall, the spiral chip removal groove is provided with a plurality of chip removal branch runners extending from the end of the cutting drill body to one end of the connecting column, and the depth and width of the chip removal branch runners decrease synchronously.

[0008] By adopting the above technical scheme, when the cutting drill bit rotates to realize drilling, the chips are discharged to the rear end through the spiral chip removal groove, and further, in the rotating process, the centrifugal force formed by the chips moves outward through the chip removal branch runners, and further achieves the purpose of orderly separating from the spiral chip removal groove, avoids the accumulation of chips in the spiral chip removal groove to cause wear and tear and the brittle fracture problem caused by local high temperature, so that the new twist drill has the effects of improving the punching capacity and prolonging the service life.

[0009] The utility model further sets up: spiral chip removal groove is at least two equal radian distribution, and the chip removal branch runner is located between two spiral chip removal groove.

[0010] Through adopting above technical scheme, make the chip that enters spiral chip removal groove move back along with spiral chip removal groove, and separate from spiral chip removal groove through chip removal branch runner, effectively avoid the problem of brittle fracture caused by the accumulation of chip and local high temperature and abrasion.

[0011] The utility model further sets up: the interval of multiple chip removal branch runner from the end of cutting drill body to one end of connecting column body gradually reduces.

[0012] Through adopting above technical scheme, reduce the distribution of chip removal branch runner in front end to improve the structural rigidity of the novel twist drill, and realize the purpose of orderly and efficient chip removal when distributing in rear end.

[0013] The utility model further sets up: the section of chip removal branch runner is half elliptical shape, and the ratio of major axis and minor axis is 4:1-1.2.

[0014] Through adopting above technical scheme, the chip removal capacity of chip removal branch runner is improved significantly, and the problem of brittle fracture caused by the accumulation of chip in spiral chip removal groove and chip removal branch runner and local high temperature and abrasion is effectively prevented.

[0015] The utility model further sets up: the groove bottom of chip removal branch runner is provided with stepped surface.

[0016] Through adopting above technical scheme, the stepped groove has the effect of avoiding chip adhesion, thereby effectively promoting the chip to separate from chip removal branch runner under the action of centrifugal force.

[0017] In conclusion, the utility model has the following beneficial effects: by setting multiple chip removal branch runners with gradually reducing depth and gradually reducing width on spiral chip removal groove, the chip entering spiral chip removal groove separates from chip removal branch runner in turn along the chip removal branch runner with gradually reducing depth, and under the action of centrifugal force, the chip is efficiently discharged from spiral chip removal groove and chip removal branch runner in turn, and the novel twist drill has the effects of improving drilling capacity and prolonging service life. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structural schematic diagram of the embodiment.

[0019] Mark explanation: 1, connecting column body, 2, cutting drill body, 21, cutting drill head, 22, spiral chip removal groove, 23, chip removal branch runner, 231, stepped surface. DETAILED DESCRIPTION

[0020] To make the technical solution and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] like Figure 1 As shown, a novel twist drill includes an integrally formed connecting post 1 and a cutting drill body 2. In this embodiment, the diameter of the cutting drill body 2 is smaller than the diameter of the connecting post 1, so as to stably clamp and fix the novel twist drill through the connecting post 1 and achieve efficient and stable drilling operation of the cutting drill body 2 while driving rotation. It should be mentioned that a cutting drill bit 21 and a spiral chip removal groove 22 located on the outer peripheral sidewall are provided at the end of the cutting drill body 2. The cutting drill bit 21 is used for drilling, and the spiral chip removal groove 22 is used to guide the chips generated by the cutting drill bit 21 out of the hole.

[0022] To prevent chips from clogging the spiral chip removal groove 22 and affecting the drilling effect and efficiency of the cutting drill bit 21, this embodiment of the application provides multiple chip removal branch grooves 23 extending from one end of the cutting drill body 2 to one end of the connecting column 1, with their depth and width decreasing synchronously. Therefore, when the cutting drill bit 21 rotates to drill, chips are discharged to the rear end through the spiral chip removal groove 22. Furthermore, during rotation, the centrifugal force generated by the chips causes them to move outward through the chip removal branch grooves 23, thus achieving orderly detachment from the spiral chip removal groove 22. This avoids chip accumulation in the spiral chip removal groove 22, preventing wear and brittle fracture caused by localized high temperatures. This results in a novel twist drill with improved drilling capability and extended service life.

[0023] In this embodiment, the spiral chip removal grooves 22 are two grooves with equal arc distribution, and the chip removal branch groove 23 is located between the two spiral chip removal grooves 22. Since the chip removal branch groove 23 is connected to the rear side of the spiral chip removal grooves 22, it effectively guides the debris out of the spiral chip removal grooves 22. As the debris enters the spiral chip removal grooves 22 and moves backward along with them, it is detached from the spiral chip removal grooves 22 via the chip removal branch groove 23. This effectively avoids the accumulation of debris leading to wear and the problem of brittle fracture caused by localized high temperatures.

[0024] like Figure 1As shown, the multiple chip removal branch sliding grooves 23 gradually decrease in spacing from the end of the cutting drill body 2 to one end of the connecting column body 1. Therefore, the layout of the multiple chip removal branch sliding grooves 23 will effectively reduce the distribution of the chip removal branch sliding grooves 23 at the front end to improve the structural rigidity of the new twist drill, and achieve the purpose of orderly and efficient removal of the chips when distributed at the rear end.

[0025] In order to further improve the chip removal effect of the multiple chip removal branch sliding grooves 23, the cross section of the chip removal branch sliding groove 23 in the embodiment of the application is in a semi-elliptical shape, and the ratio of the major axis to the minor axis is 4:1-1.2. Therefore, the shape structure of the chip removal branch sliding groove 23 will significantly improve the chip removal capacity of the chip removal branch sliding groove 23, effectively prevent the chips from accumulating in the spiral chip removal groove 22 and the chip removal branch sliding groove 23 to cause wear and brittle fracture caused by local high temperature. At the same time, in order to avoid the accumulation of chips in the multiple chip removal branch sliding grooves 23, a stepped surface 231 is arranged at the bottom of the chip removal branch sliding groove 23. The stepped groove has the effect of avoiding the adhesion of the chips, thereby effectively promoting the chips to separate from the chip removal branch sliding groove 23 under the action of centrifugal force.

[0026] In summary, the utility model discloses a new twist drill, the new twist drill is provided with multiple chip removal branch sliding grooves 23 with gradually decreasing depth and width on the spiral chip removal groove 22 to make the chips entering the spiral chip removal groove 22 separate from the chip removal branch sliding groove 23 in turn along the chip removal branch sliding groove 23 with decreasing depth, and under the action of centrifugal force, the chips are efficiently removed from the spiral chip removal groove 22 and the chip removal branch sliding groove 23 in turn, and the new twist drill has the effects of improving the punching capacity and prolonging the service life.

[0027] The "first", "second", "third", "fourth" and the like (if any) in the present application are used to distinguish similar objects, and do not necessarily be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods or devices.

[0028] It should be noted that the terms "first", "second", and the like in the description and in the claims do not denote any particular importance, but are merely used to distinguish one element from another. Thus, a "first" and "second" feature can be presented explicitly or implicitly, and can include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

[0029] The principles and implementation manners of the present application are described herein by applying specific examples, and the above description of the examples is only for helping to understand the method of the present application and its core idea; meanwhile, for those skilled in the art, the specific implementation manners and application ranges will be changed according to the idea of the present application, and in view of the above, the content of the specification should not be understood as limiting the present application.

Claims

1. A new twist drill characterized by: The application relates to a cutting drill body (2) and a connecting column body (1) which are integrally formed; the end of the cutting drill body (2) is provided with a cutting drill head (21) and a spiral chip removal groove (22) on the outer circumferential side wall; the spiral chip removal groove (22) is provided with a plurality of chip removal branch sliding grooves (23) which extend from the end of the cutting drill body (2) to one end of the connecting column body (1) and whose depth and width are synchronously reduced.

2. A new type of twist drill according to claim 1, characterized in that: The spiral chip removal groove (22) is at least two arcs, and the chip removal branch sliding groove (23) is located between the two spiral chip removal grooves (22).

3. A new type of twist drill according to claim 1, characterized in that: The interval of the plurality of chip removal branch sliding grooves (23) from the end of the cutting drill body (2) to one end of the connecting column body (1) is gradually reduced.

4. A new type of twist drill according to claim 1, characterized in that: The cross section of the chip removal branch sliding groove (23) is a semi-elliptical shape, and the ratio of the long diameter to the short diameter is 4:1-1.

2.

5. A new type of twist drill according to claim 1, characterized in that: The groove bottom of the chip removal branch sliding groove (23) is provided with a stepped surface (231).

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