Hollow drill bit facilitating chip removal

Abstract

The utility model discloses a hollow drill bit convenient for chip removal, which comprises a tool bit and a base body, the base body is of a cylindrical structure, and the tool bit is fixedly connected to the lower end of the base body; a first chip guide groove is formed in the outer wall of the tool bit, and a second chip guide groove is formed in the inner wall of the tool bit. A chip guide hole communicated with the inside and the outside is formed in the side wall of the base body, and a spiral chip guide groove is formed in the outer wall of the base body; and the chip guide hole penetrates through the spiral chip guide groove. Compared with the prior art, according to the hollow drill bit facilitating chip removal, the chip guide structures are arranged on the tool bit and the base body, cutting chips generated when the drill bit works can be conveniently discharged, the drill bit is prevented from being heated and fractured, and vibration and noise generated when the drill bit works are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of drill bit, concretely relates to a hollow drill bit convenient for chip removal. BACKGROUND

[0002] The traditional hollow drill bit as shown in patent CN101289924A is commonly used for drilling through holes on concrete, which is usually composed of a cutter head and a cylindrical base. The outer wall of the existing hollow drill bit base is smooth, and in the use process, the cuttings cut down by the cutter head are not easy to discharge, which will increase the resistance of the drill bit, and the drill bit is also more prone to heat fracture, and the accumulation of cuttings also makes the drill bit produce great vibration and noise when working.

[0003] In view of this, the present inventors have conducted in-depth research on the above-mentioned defects in the prior art, and thus the present case is generated. SUMMARY

[0004] The main purpose of the utility model is to provide a hollow drill bit convenient for chip removal, which has the advantage of facilitating the discharge of cutting chips.

[0005] In order to achieve the above-mentioned purpose, the solution of the utility model is as follows:

[0006] A hollow drill bit convenient for chip removal, comprising a cutter head and a base, wherein the base is a cylindrical structure, the cutter head is fixedly connected to the lower end of the base, the outer wall of the cutter head is formed with a first chip guide groove, and the inner wall of the cutter head is formed with a second chip guide groove; the side wall of the base is formed with a chip guide hole communicating between the inside and the outside, and the outer wall of the base is formed with a spiral chip guide groove; the chip guide hole passes through the spiral chip guide groove.

[0007] Further, the lower end of the cutter head is formed with an arc groove, and the arc groove and the first chip guide groove are communicated.

[0008] Further, the number of cutter heads is four, and the four cutter heads are respectively welded and fixed to the lower end circumference of the base at the same angular interval.

[0009] Further, the number of first chip guide grooves on each cutter head is two, and the second chip guide groove is formed between the two first chip guide grooves.

[0010] Further, a connecting head is formed on the upper end of the cutter head, and a limiting surface is formed on the outer side wall of the connecting head.

[0011] Further, the cutter head is made of diamond material, and the base is made of stainless steel material.

[0012] After adopting the above structure, the hollow drill bit convenient for chip removal of the utility model has at least the following beneficial effects:

[0013] I. In use, the cutting chips cut from the outer side of the drill head are collected and conveyed upward along the first chip guide groove, and the inner side wall and the outer side wall of the drill head are generally higher than the inner side wall and the outer side wall of the base, so that the cutting chips can be conveyed to the spiral chip guide groove along the gap and discharged upward along the spiral chip guide groove. Similarly, the cutting chips on the inner side of the drill head are collected and conveyed upward by the second chip guide groove, and the cutting chips on the inner side are conveyed upward to the chip guide hole and then conveyed to the spiral chip guide groove through the chip guide hole, and then discharged upward from the spiral chip guide groove along with the rotation of the drill bit.

[0014] II. By arranging the arc groove at the lower end of the drill head, the contact area of the drill head during cutting can be reduced, thereby reducing the cutting resistance and the heat and vibration during cutting, and the cutting chips generated during cutting can also be discharged from the arc groove to the first chip guide groove, further improving the chip removal effect of the product.

[0015] III. By means of the connecting head, the drill bit can be conveniently connected with the brick machine device, and the brick machine device can abut against the limiting surface, so that the motor of the brick machine device can drive the drill bit to rotate.

[0016] Compared with the prior art, the hollow drill bit convenient for chip removal disclosed by the utility model is provided with a chip guide structure on the drill head and the base, so that the cutting chips generated during the operation of the drill bit can be conveniently discharged, the drill bit is prevented from being heated and broken, and the vibration and noise during the operation of the drill bit are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a perspective view of a hollow drill bit convenient for chip removal according to the utility model.

[0018] Figure 2 FIG. 2 is a perspective view of a hollow drill bit from another angle.

[0019] Figure 3 FIG. 3 is a bottom view of a hollow drill bit convenient for chip removal according to the utility model.

[0020] Figure 4 FIG. 4 is a perspective view of a drill head in the utility model.

[0021] In the drawings:

[0022] Drill head 1; base 2;

[0023] First chip guide groove 11; second chip guide groove 12; arc groove 13;

[0024] Chip guide hole 21; spiral chip guide groove 22; connecting head 23; limiting surface 24. DETAILED DESCRIPTION

[0025] In order to further explain the technical scheme of the utility model, the utility model will be described in detail below through specific embodiments.

[0026] As shown in Figures 1 to 4 , it is a hollow drill bit convenient for chip removal, which is related to the utility model, including cutter head 1 and base body 2, the base body 2 is cylindrical structure, the cutter head 1 is fixedly connected in the lower end of the base body 2, the outer wall of the cutter head 1 is formed with first chip guide groove 11, the inner wall of the cutter head 1 is formed with second chip guide groove 12, the lateral wall of the base body 2 is formed with the chip guide hole 21 that is communicated inside and outside, the outer wall of the base body 2 is formed with spiral chip guide groove 22, the chip guide hole 21 is threaded through the spiral chip guide groove 22. When using, the cutting chip cut down outside the cutter head 1 can be collected along the first chip guide groove 11 and is sent upwards, generally the inner lateral wall and the outer lateral wall of the cutter head 1 can be higher than the inner lateral wall and the outer lateral wall of the base body 2 respectively, and the cutting chip can be gradually sent to the spiral chip guide groove 22 along the gap and is discharged upwards along the spiral chip guide groove 22. Similarly, the cutting chip inside the cutter head 1 is collected by the second chip guide groove 12 and is sent upwards, and the cutting chip inside is sent upwards to the chip guide hole 21, and then is sent to the spiral chip guide groove 22 through the chip guide hole 21, and then is discharged upwards from the spiral chip guide groove 22 along with the rotation of the drill bit.

[0027] Preferably, the lower end of the cutter head 1 is formed with arc groove 13, and the arc groove 13 is communicated with the first chip guide groove 11. By setting the arc groove 13 at the lower end of the cutter head 1, the contact area of the cutter head 1 can be reduced during cutting, thereby reducing the cutting resistance, reducing the heat and vibration during cutting, and the cutting chip generated during cutting can also be discharged from the arc groove 13 to the first chip guide groove 11, further improving the chip removal effect of the product.

[0028] Preferably, as shown in Figure 3 , the number of the cutter head 1 is four, and the four cutter heads 1 are respectively welded and fixed at the lower end circumference of the base body 2 with the same angular interval. The number of the first chip guide groove 11 on each cutter head 1 is two, and the second chip guide groove 12 is formed between the two first chip guide grooves 11. Such staggered arrangement can make the cutting chip more uniformly discharged from the first chip guide groove 11 and the second chip guide groove 12.

[0029] Preferably, the upper end of the cutter head 1 is formed with connecting head 23, and the outer lateral wall of the connecting head 23 is formed with limiting surface 24. Through the connecting head 23, the drill bit can be conveniently connected with the drilling device, and the drilling device can abut against the limiting surface 24, so that the motor of the drilling device can drive the drill bit to rotate.

[0030] Preferably, the cutter head 1 is made of diamond material, and the base body 2 is made of stainless steel material.

[0031] Compared with the prior art, the hollow drill bit convenient for chip removal is characterized in that the chip guide structure is arranged on the cutter head 1 and the base body 2, so that the cutting chips generated during the work of the drill bit are conveniently discharged, the drill bit is prevented from being broken due to heating, and the vibration and noise during the work of the drill bit are reduced.

[0032] The above-mentioned embodiments and drawings are not limited to the product shape and style of the utility model, and any ordinary skilled person in the art can make appropriate changes or modifications, which should be considered as not departing from the patent category of the utility model.

Claims

1. A core drill bit facilitating chip evacuation, characterized in that, The utility model relates to a cutting tool, including cutter head and base body, the base body is cylindrical structure, the cutter head fixed connection is connected in the lower extreme of base body, the outer wall of cutter head forms first chip flute, the inner wall of cutter head forms second chip flute, the lateral wall of base body forms the chip hole of inside and outside intercommunication, the outer wall of base body forms spiral chip flute, chip hole passes through spiral chip flute.

2. A core drill bit for facilitating chip evacuation as claimed in claim 1, wherein, The lower end of the cutter head is formed with an arc groove, and the arc groove is communicated with the first chip flute.

3. A core drill bit for facilitating chip evacuation as claimed in claim 1, wherein, The number of the cutter heads is four, and the four cutter heads are welded and fixed at the lower end of the base body with the same angular interval.

4. A core drill bit for facilitating chip evacuation as claimed in claim 3, wherein, The number of the first chip flutes on each cutter head is two, and the second chip flute is formed between the two first chip flutes.

5. A core drill bit for facilitating chip evacuation as defined in claim 1, wherein, The upper end of the cutter head is formed with a connecting head, and a limiting surface is formed on the outer side wall of the connecting head.

6. A core drill bit for facilitating chip evacuation as defined in claim 1, wherein, The cutter head is made of diamond material, and the base body is made of stainless steel material.

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