JP3169922U6 - Drill chip discharge groove structure - Google Patents

Abstract

A drill with improved chip discharging effect and structural strength.
SOLUTION: A main body 11 and a groove portion 12 are provided, and two cutting blade portions 13 are arranged to face each other at one end portion away from the main body 11 of the groove portion 12, and on the outer edge of the two cutting blade portions 13, The gaps 14 are respectively recessed. From the side edges of the two cutting blade portions 13, two chip discharge grooves 151 and 152 having different lengths and spiral angles are continuously provided on the groove portion 12 in the direction of the main body 11. That is, the two chip discharge grooves 15 are non-parallel and intersect with each other, and are provided in the groove portion 12 to promote discharge of the cutting chips.
[Selection] Figure 1

Description

The present invention relates to a structure of a drill chip discharge groove of a drill, and in particular, two spiral chip discharge grooves that are different in length and are non-parallel and intersect each other are provided from both sides of the two cutting blade portions of the drill. Thus, the present invention relates to a structure of a chip discharge groove of a drill that can quickly discharge chips when drilling with a drill.

During various machining operations, drilling is frequently applied in addition to operations such as lathe machining, bench machining, scissor machining, milling, and welding. Moreover, a cutting tool is required in any machining operation. The drill used when drilling is the most frequently applied cutting tool during general machining. The cutting blade portion of the drill needs to have a predetermined angle, size, and length according to the drilling, whereby the drilling operation is performed smoothly. During the process of drilling and cutting with a drill, it is necessary to discharge chips to the outside of the hole. Thereby, during the process of drilling and cutting with a drill, it is possible to prevent the hole from being clogged with chips and to prevent drilling, and the drilling operation can be performed smoothly. The conventional drill used for drilling work is provided with a chip discharge groove spirally from the two cutting edge portions of the drill along the axial direction of the drill, so that the chips cut by the two cutting edge portions can be removed. It is discharged outside through the two chip discharge grooves.
However, the width of the two chip discharge grooves is narrow because the dimensions of the drill and the spiral angle of the two chip discharge grooves are taken into consideration. As a result, chips are not discharged smoothly. Moreover, when drilling with a conventional drill, the following problems (1) and (2) occur.

(1) Since the two chip discharge grooves on the drill face each other spirally, the width is narrow. Thereby, when the chip discharge groove discharges the chip, the chip discharge groove is clogged or caught, and the chip is not discharged smoothly. This also makes the drill easy to tear.

  (2) Since it is necessary to provide two chip discharge grooves spirally within the diameter of the drill, the inside of the two chip discharge grooves is extremely thin. Thereby, the strength of the drill is reduced, and when drilling with the drill, the drill is easily broken by the resistance force.

  In view of the problems of the conventional drill described above, the inventor of the present invention and those skilled in the art have a structure in which the two chip discharge grooves of the conventional drill face each other in a spiral shape. R & D was conducted to solve the problem of weakness and the problem that chips cannot be discharged smoothly.

The inventor of the present invention collects related materials in view of the problems and disadvantages of the above-mentioned prior art, and as a result of many trial manufactures and corrections based on many years of experience in the industry, finally, chips are hard to clog, The present invention has devised a structure of the chip discharge groove of the drill of the present invention that can discharge the chips smoothly and increase the structural strength of the drill.

JP 2001-341018 A

The first object of the present invention is to provide a groove extending from the drill body in the distal direction. Two cutting blades are arranged opposite to each other at one end of the groove. Are provided with two chip discharge grooves of different lengths in the rear end direction from the side edges of the two cutting blade portions, and the two chip discharge grooves of different lengths are: On the groove part, they are installed in different spiral angles at different spiral angles so that they cross each other in a non-parallel manner, and the chip discharge groove has a large width, so when drilling, chips are quickly discharged to the outside along the chip discharge groove. In addition, an object of the present invention is to provide a structure of a chip discharge groove of a drill that can prevent chips from accumulating in the chip discharge groove and reduce tearing of the drill.
The second object of the present invention is to provide two chip discharge grooves of different lengths in the groove of the drill, and the subsequent stage of the short chip discharge groove communicates with the long chip discharge groove, so that the width of the chip discharge groove is increased. Since the space for discharging chips is expanded and the chip is discharged, the discharge of chips can be accelerated and the thickness of the drill in the groove portion can be increased, so that the structure of the drill can be strengthened. An object of the present invention is to provide a drill chip discharge groove structure that can reduce the tearing of the drill.
The third object of the present invention is that two chip discharge grooves having different lengths are spirally provided in the groove of the drill, and the two chip discharge grooves having different lengths have different spiral angles, and the short chip discharge. The angle difference between the groove and the long chip discharge groove is between about 2 degrees and 55 degrees, and the length of the short chip discharge groove is between about 1% and 95% of the long chip discharge groove. It is to provide a structure of the discharge groove.

In order to solve the above-described problem, the invention of claim 1 is provided such that the groove portion of the chip discharge groove extends toward one end side of the drill body or toward the tip end, and one end portion of the groove portion includes: Two cutting blade portions are arranged opposite to each other, and two groove discharge grooves having different lengths and spiral angles are provided in the groove portion in the direction of the main body from the sides of the two cutting blade portions. Is a structure of a chip discharge groove of a drill, characterized in that it is provided in a spiral shape in a manner that is non-parallel and intersects with each other on the groove portion.

  The invention according to claim 2 is the structure of the chip discharge groove of the drill according to claim 1, wherein the drill is a general drill or a micro drill.

  The invention according to claim 3 is the structure of the chip discharge groove of the drill according to claim 2, wherein the diameter of the micro drill is between 0.05 mm and 0.80 mm.

  The invention according to claim 4 is characterized in that a gap is provided in each of the outer edges of the two cutting edge portions of the groove portion of the drill, or the gap is not provided. This is a structure of a chip discharge groove.

  According to the invention of claim 5, gaps are respectively formed in the outer edges of the two cutting edges of the groove of the drill, and the size of each gap is between 1% and 40% of the diameter of the drill. It is the structure of the chip discharge groove | channel of the drill of Claim 4 characterized by the above-mentioned.

Two chip discharge grooves having different lengths and spiral angles are provided in the groove portion of the drill. The width of the chip discharge groove can be effectively increased by providing the chip with two chip discharge grooves that are non-parallel and intersect each other. As a result, when drilling with a drill, chips can be discharged quickly, preventing chips from accumulating or clogging, and reducing drill tearing when drilling. it can.
As the chip discharge grooves of the drill, two chip discharge grooves including a short chip discharge groove and a long chip discharge groove having different lengths are provided. The short chip discharge groove and the long chip discharge groove are provided in such a manner that they are non-parallel and cross each other. Moreover, most of the grooves are long chip discharge grooves. Thereby, the thickness of the drill at the position of the groove portion is increased, the structural strength of the groove portion and the entire drill is increased, and it is possible to reduce the tearing of the drill when performing a drilling operation.

1 is a perspective view showing a drill according to an embodiment of the present invention. 1 is a side view showing a drill according to an embodiment of the present invention. It is a top view which shows the drill by one Embodiment of this invention.

DESCRIPTION OF EMBODIMENTS Embodiments showing the objects, features, and effects of the present invention will be described in detail with reference to the drawings.

Please refer to FIG. FIG. 1 is a perspective view showing a drill according to an embodiment of the present invention. FIG. 2 is a side view showing a drill according to an embodiment of the present invention. FIG. 3 is a top view illustrating a drill according to an embodiment of the present invention. As can be seen from FIGS. 1 to 3, the drill 1 according to an embodiment of the present invention includes a main body 11 and a groove 12.

From one side of the main body 11 of the drill 1, a groove 12 extends in the distal direction. Two cutting edge portions 13 are disposed opposite to one end portion of the groove portion 12 away from the main body 11. The gaps 14 are respectively recessed in the outer edges of the two cutting blade portions 13. Two chip discharge grooves 15 having different lengths are spirally provided along the groove 12 in the direction of the main body 11 from the other two side edges of the two cutting blade parts 13. The two chip discharge grooves 15 having different lengths include a short chip discharge groove 151 and a long chip discharge groove 152. The short chip discharge groove 151 and the long chip discharge groove 152 are provided in the groove portion 12 at different spiral angles. That is, the short chip discharge groove 151 and the long chip discharge groove 152 are provided in the groove portion 12 in such a manner that the spiral angles are not parallel and intersect each other. The drill 1 is comprised by the above structure.

The drill 1 is a general drill 1 or a micro drill 1. When the present invention is applied to the micro drill 1, the diameter of the micro drill 1 is between 0.05 mm and 0.80 mm.

It is not necessary to provide the gap 14 on the outer edge of the two cutting edge portions 13 of the drill 1. When the gaps 14 are respectively recessed, the recess size of each gap 14 is between 1% and 40% of the diameter of the drill 1.

Two chip discharge grooves 15 are provided in the groove portion 12 of the drill 1. The short chip discharge groove 151 and the long chip discharge groove 152 of the two chip discharge grooves 15 are provided around the groove portion 12 at different spiral angles. The spiral angle between the short chip discharge groove 151 and the long chip discharge groove 152 is between 2 degrees and 55 degrees. Further, the helical length of the short chip discharge groove 151 is between 1% and 95% of the long chip discharge groove 152. Further, the short chip discharge groove 151 is spirally provided in the groove portion 12 and communicated with the long chip discharge groove 152, whereby the width of the chip discharge groove 15 is increased. This accelerates the chip discharge speed. Moreover, since the long chip | tip discharge groove | channel 152 is only provided in most along the length on the groove part 12, the substantial diameter of the drill 1 is increased and the structural strength of the whole drill 1 and the groove part 12 is increased. Enhanced. That is, when a drilling operation is performed by the drill 1, chips are quickly discharged by the two chip discharge grooves 15 having different spiral angles over the length of the groove portion 12. As a result, clogging of chips into the chip discharge groove 15 is reduced, and tearing when the drill 1 performs a drilling operation is reduced. Furthermore, the drilling quality is increased.

The above description shows a preferred embodiment of the present invention, and does not limit the scope of the utility model registration request of the present invention. Two chip discharge grooves 15 having different lengths and spiral angles are respectively provided from two side edges of the two cutting edge portions 13 provided in the groove portion 12 of the drill 1 according to the embodiment of the present invention. The short chip discharge groove 151 and the long chip discharge groove 152 of the two chip discharge grooves 15 are spirally provided on the groove portion 12 in such a manner that the spiral angles are not parallel and intersect each other. Thereby, the formation range of the two chip discharge grooves 15 can be increased, and the drill 1 can discharge chips quickly. Further, when drilling with the drill 1, the chips are quickly discharged, so that the chips are not collected or clogged in the two chip discharge grooves 15. Moreover, by providing the two chip discharge grooves 15 having different lengths, the thickness can be increased in most of the length of the drill 1. Thereby, since the structural strength of the drill 1 can be increased, it is possible to reduce the tearing of the drill 1 during the drilling operation. That is, all the structures and devices capable of realizing the above-described effects are included in the present invention, and simple modifications of the present invention and changes in equivalent effects are all included in the claims of the utility model registration of the present invention.

When using the structure of the drill chip discharge groove according to the above-described embodiment of the present invention, the following effects (1) and (2) can be realized.

(1) Two chip discharge grooves 15 having different lengths and spiral angles are provided in the groove portion 12 of the drill 1. By providing the two chip discharge grooves 15 in the groove portion 12 in such a manner that the spiral angles are not parallel and intersect each other, the width of the chip discharge grooves 15 can be effectively increased. Thereby, when drilling is performed by the drill 1, chips can be quickly discharged, and the chips can be prevented from accumulating or clogging, and the drill 1 can be prevented from tearing when the drilling is performed. be able to.

(2) Two chip discharge grooves 15 including a short chip discharge groove 151 and a long chip discharge groove 152 having different lengths are provided in the groove portion 12 of the drill 1. The short chip discharge groove 151 and the long chip discharge groove 152 are provided in such a manner that the spiral angles are not parallel and intersect each other. Further, most of the groove portion 12 is a long chip discharge groove 152. Thereby, the thickness of the drill 1 at the position of the groove portion 12 is substantially increased, the structural strength of the groove portion 12 and the drill 1 as a whole is increased, and the drill 1 can be prevented from being broken when performing a drilling operation. .

As can be seen from the above description, the present invention relates to the design of a chip discharge groove of a drill. In the groove portion of the drill, two chip discharge grooves having different lengths and spiral angles are provided. The short chip discharge groove and the long chip discharge groove of the two chip discharge grooves are arranged in a spiral manner on the groove portion in such a manner that the spiral angles are not parallel and intersect each other. Thereby, the width of the two chip discharge grooves can be increased, and the drill can discharge chips quickly. Moreover, since the thickness of the drill in the groove portion can be increased by communicating the latter stage of the short chip discharge groove with the long chip discharge groove, the entire drill and the structure of the groove portion can be strengthened. The tearing can be reduced and the drilling effect of the drill can be enhanced.

The above description shows a preferred embodiment of the present invention, and does not limit the scope of the utility model registration request of the present invention. Any change in effect is included in the scope of the claim for utility model registration of the present invention.

As can be seen from the above description, the drill of the present invention is a device that can reliably achieve its effect and purpose and has high practicality.

DESCRIPTION OF SYMBOLS 1 Drill 11 Main body 12 Groove part 13 Cutting edge part 14 Gap 15 Chip discharge groove 151 Short chip discharge groove 152 Long chip discharge groove

Claims (5)

From one end side of the drill body, a groove portion is extended toward the tip direction, and two cutting edge portions are arranged opposite to one end portion of the groove portion,
In the groove portion, two chip discharge grooves having different lengths and spiral angles are continuously provided from the side edges of the two cutting edge portions toward the main body, and the two chip discharge grooves are A structure of a chip discharge groove of a drill, wherein the groove portion is provided in a spiral shape in a manner that the spiral angles are non-parallel and intersect with each other on the groove portion.   The structure of the chip discharge groove of the drill according to claim 1, wherein the drill is a general drill or a micro drill.   The diameter of the said micro drill is between 0.05 mm-0.80 mm, The structure of the chip discharge groove | channel of the drill of Claim 2 characterized by the above-mentioned.   2. The structure of a drill chip discharge groove according to claim 1, wherein a gap is provided in each of the outer edges of the two cutting edge portions of the groove portion of the drill, or a gap is not provided. .   The outer edges of the two cutting edge portions of the groove portion of the drill are respectively provided with gaps, and the size of each gap is between 1% and 40% of the diameter of the drill. Item 5. The structure of the chip discharge groove of the drill according to Item 4.

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