CN216541018U - Shallow hole drill - Google Patents

Abstract

The utility model discloses a shallow hole drill, which relates to the technical field of hardware tools and comprises a drill bit body, wherein one end of the drill bit body is provided with a handle; more than two first blades detachably connected to the other end of the drill bit body; and the chip discharge groove is formed in one end, close to the first blade, of the drill bit body. The utility model has the technical effect that the rigidity is good.

Description

Shallow hole drill

Technical Field

The utility model relates to the technical field of hardware tools, in particular to a shallow hole drill.

Background

The shallow hole drill is a hardware tool for machining holes, has the advantage of high machining efficiency, and is widely applied to the field of machining.

Related shallow hole bores generally has many chip grooves to lead to the rigidity of shallow hole to bore poor, often appear processing vibrations and processing deformation wait unfavorable condition, and then lead to blade edge tipping, blade fragmentation, cutter body damage, the processing surface appear shake line and processing size unstability wait unfavorable condition.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

Aiming at the technical problem of poor rigidity of the shallow hole drill, the utility model provides the shallow hole drill which is good in rigidity.

2. Technical scheme

In order to solve the problems, the technical scheme provided by the utility model is as follows:

a shallow hole drill comprising:

the drill bit comprises a drill bit body, wherein one end of the drill bit body is provided with a handle;

more than two first blades detachably connected to the other end of the drill bit body;

and the chip removal groove is formed in one end, close to the first blade, of the drill bit body.

Optionally, the second blade is detachably connected to one end of the drill bit body, which is far away from the handle, and the second blade is arranged opposite to the first blade.

Optionally, one side of the drill bit body, which is close to the second blade, is provided with a chip removal hole communicated with the chip removal groove.

Optionally, the combined radial dimension of the first insert and the second insert is greater than one-half of the nominal diameter of the bit body.

Optionally, the combined radial dimension of the first insert is greater than one-half of the nominal diameter of the bit body.

Optionally, the radial cross-sectional area of the chip groove is 0.4-0.7 of the radial cross-sectional area of the drill body.

Optionally, a ratio of a chord length of the flute to the outer circumference of the drill body ranges from 0.2 to 0.4.

Optionally, adjacent first blades overlap each other.

Optionally, the overlapping size range of the cutting edges of the adjacent first blades is 0.5-2.5 mm.

Optionally, the included angle α between adjacent first blades ranges from 1 ° to 45 °.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects: the chip removal groove is used for discharging scraps generated by the first blade and preventing blockage, and only one chip removal groove is arranged, so that chip removal can be guaranteed, and the rigidity of a drill bit body cannot be greatly influenced, so that the rigidity of a shallow hole drill is guaranteed to be good.

Drawings

Fig. 1 is a schematic structural diagram of a shallow hole drill according to an embodiment of the present invention;

FIG. 2 is a second schematic structural diagram of a shallow hole drill according to an embodiment of the present invention;

FIG. 3 is a third schematic view of a shallow hole drill according to an embodiment of the present invention;

FIG. 4 is a fourth schematic view of a shallow hole drill according to an embodiment of the present invention;

in the figure: 1. a drill bit body; 2. a handle; 3. a first blade; 31. cutting the cutting edge; 4. a chip groove; 5. a second blade; 6. chip removal holes.

Detailed Description

For a further understanding of the present invention, reference will now be made in detail to the embodiments illustrated in the drawings.

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. The terms first, second, and the like in the present invention are provided for convenience of describing the technical solution of the present invention, and have no specific limiting effect, but are all generic terms, and do not limit the technical solution of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. The technical solutions in the same embodiment and the technical solutions in different embodiments can be arranged and combined to form a new technical solution without contradiction or conflict, and the technical solutions are within the scope of the present invention.

Example 1

With reference to fig. 1-4, the present embodiment provides a shallow hole drill, comprising:

the drill bit comprises a drill bit body 1, wherein a handle 2 is arranged at one end of the drill bit body 1;

more than two blades I3 which are detachably connected with the other end of the drill bit body 1;

and the chip groove 4 is arranged at one end of the drill bit body 1 close to the first blade 3.

Specifically, the drill bit body 1 is used for supporting the handle 2 to ensure the stability of the handle 2, and the handle 2 is used for being matched with cutting equipment, so that the shallow hole drill is matched with the cutting equipment, and the cutting equipment is convenient to drive the shallow hole drill to rotate; the first blade 3 is supported by the drill bit body 1, the stability of the first blade 3 can be ensured, the first blade 3 can be replaced or maintained conveniently due to the detachable connection between the first blade 3 and the second blade 3, the first blade 3 is used for cutting a workpiece to be machined, in addition, the number of the first blade 3 is at least two in order to increase the cutting efficiency, meanwhile, the specific number of the first blade 3 is not limited, and the comprehensive consideration can be given according to the factors such as machining cost and manufacturing cost; the chip removal groove 4 is used for discharging scraps generated by the first blade 3 and preventing blockage, and only one chip removal groove 4 is arranged, so that chip removal can be guaranteed, great influence on rigidity of the drill bit body 1 cannot be generated, and the rigidity of the shallow hole drill is guaranteed.

Furthermore, a second blade 5 is detachably connected to one end of the drill bit body 1 far away from the handle 2, and the second blade 5 is arranged opposite to the first blade 3.

Concretely, the second blade 5 can guarantee stability through the support of drill bit body 1, and because can dismantle the connection between the two, be convenient for in time change or maintain the second blade 5, the second blade 5 is used for the cutting to treat the machined part to cooperation blade one 3 further increases cutting efficiency, and because blade two 5 and blade one 3 relative and establish, the equal cut volume of being convenient for.

Furthermore, one side of the drill bit body 1 close to the second blade 5 is provided with a chip removal hole 6 communicated with the chip removal groove 4.

Specifically, the chip removal hole 6 is supported by the drill bit body 1, so that stability can be guaranteed, the chip removal hole 6 is used for discharging scraps cut by the second blade 5, blocking is prevented, and the chip removal groove 4 is communicated with the chip removal hole 6, so that the scraps in the chip removal hole 6 can be conveniently discharged through the chip removal groove 4.

Further, the combined radial dimension of the first insert 3 and the second insert 5 is greater than one-half the nominal diameter of the bit body 1.

Particularly, the contact area between the first blade 3 and the second blade 5 and a workpiece to be machined is increased, so that the cutting efficiency is effectively increased.

Further, the combined radial dimension of the first insert 3 is greater than one-half of the nominal diameter of the bit body 1.

Particularly, the contact area between the first blade 3 and a workpiece to be machined is increased, so that the cutting efficiency is effectively increased.

Further, the radial sectional area of the chip groove 4 is 0.4-0.7 of the radial sectional area of the bit body 1.

Specifically, the radial sectional area of the chip groove 4 may be 0.4, 0.5, 0.7, or the like of the radial sectional area of the drill body 1, and if the radial sectional area of the chip groove 4 is too small, the chip removal performance of the chip groove 4 may be insufficient, and if the radial sectional area of the chip groove 4 is too large, the rigidity of the drill body 1 may be insufficient, so that the rigidity of the shallow hole drill may be insufficient.

Further, the ratio of the chord length of the chip groove 4 to the outer circumferential length of the drill body 1 ranges from 0.2 to 0.4.

Specifically, the ratio of the chord length of the chip groove 4 to the outer circumference of the drill body 1 may be in a range of 0.2, 0.3, or 0.4, and if the chord length of the chip groove 4 is too small, the chip removal performance of the chip groove 4 may be insufficient, and if the chord length of the chip groove 4 is too large, the rigidity of the drill body 1 may be insufficient, thereby causing the rigidity of the shallow hole drill to be insufficient.

Further, the adjacent first blades 3 are overlapped with each other.

Particularly, the plurality of first blades 3 are convenient to mount, the accommodating capacity of the first blades 3 is effectively increased, and different first blades 3 are convenient to cut different radial positions of a workpiece to be machined, so that the cutting efficiency is increased.

Further, the overlapping dimension of the cutting edges 31 of the adjacent first blades 3 ranges from 0.5mm to 2.5 mm.

Specifically, the overlapping size may be 0.5mm, 1mm, or 2.5mm, and if the overlapping size is too small, the accommodation amount of the first blade 3 will be reduced, and if the overlapping size is too large, it is inconvenient for the different first blades 3 to share the cutting amount.

Further, the included angle alpha of the adjacent first blade 3 ranges from 1 to 45 degrees.

Specifically, the included angle α may be 1 °, 20 °, or 45 °, and if the included angle is too large, it is not favorable for the chip discharge groove 4 to discharge the scraps generated by all the first blades 3 together.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the utility model, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the utility model.

Claims (10)

1. A shallow hole drill, comprising:

the drill bit comprises a drill bit body, wherein one end of the drill bit body is provided with a handle;

more than two first blades detachably connected to the other end of the drill bit body;

and the chip removal groove is formed in one end, close to the first blade, of the drill bit body.

2. A shallow hole drill as claimed in claim 1 wherein a second blade is removably attached to the end of the drill body remote from the shank, the second blade being opposite the first blade.

3. The shallow hole drill as claimed in claim 2, wherein a side of the drill body adjacent to the second blade is provided with a chip removal hole communicating with the chip removal groove.

4. A shallow hole drill as claimed in claim 2 wherein the combined radial dimension of the first and second inserts is greater than one-half the nominal diameter of the drill body.

5. A shallow hole drill as claimed in any one of claims 1 to 4 wherein the combined radial dimension of the first inserts is greater than one-half the nominal diameter of the drill body.

6. A shallow hole drill as claimed in any one of claims 1 to 4 wherein the radial cross-sectional area of the flutes is 0.4 to 0.7 of the radial cross-sectional area of the bit body.

7. A shallow hole drill as claimed in any one of claims 1 to 4, wherein the ratio of the chord length of the flutes to the outer circumference of the bit body is in the range 0.2 to 0.4.

8. A shallow hole drill as claimed in any one of claims 1 to 4 wherein adjacent said inserts one on top of the other.

9. A shallow hole drill as claimed in claim 8 wherein the overlap dimension of the cutting edges of adjacent first inserts is in the range 0.5-2.5 mm.

10. A shallow hole drill as claimed in claim 8 wherein the included angle α between adjacent inserts is in the range 1-45 °.

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