CN216328934U

CN216328934U - Drill bit for drilling large-outer-diameter hole

Info

Publication number: CN216328934U
Application number: CN202122861433.4U
Authority: CN
Inventors: 胥晓强
Original assignee: Mianyang Yasen Hardware Tool Co ltd
Current assignee: Mianyang Yasen Hardware Tool Co ltd
Priority date: 2021-11-19
Filing date: 2021-11-19
Publication date: 2022-04-19
Anticipated expiration: 2031-11-19

Abstract

The utility model discloses a drill bit for drilling a large-outer-diameter hole, and relates to the technical field of wood processing tools; this drill bit includes bores the body and the drill handle of being connected with boring the body, and wherein bores the body and has cylindric cutting end, and bores the body and include: three chip grooves, an alloy center tip and three alloy blades; the three chip grooves are uniformly arranged along the cutting end in the same rotating direction, and the alloy center tip is fixed at the center position of the cutting end; the three alloy blades are fixed on the end face of the cutting end and are distributed around the alloy center point at equal angles by taking the alloy center point as a circle center, and concave-convex connected R cutting edges are arranged on the cutting edges of the three alloy blades; through implementing this technical scheme, can effectively solve the technical problem that the shake easily appears when current drill bit cuts big external diameter hole, cutting resistance is little when using, improves the bit to the positional stability of work piece, makes the cutter cutting sound littleer when using, can effectively improve the life and the machining efficiency of cutter.

Description

Drill bit for drilling large-outer-diameter hole

Technical Field

The utility model relates to the technical field of wood processing tools, in particular to a special woodworking drill bit for drilling a large-outer-diameter hole.

Background

The prior art is mainly suitable for drilling various kinds of wood and mainly comprises two types, namely a common twist drill and a flat-wing drill, wherein the common twist drill only comprises a drill body and a drill handle, and the head of the drill body is conical, so that a drilled hole is not smooth enough and has unsmooth chip removal in actual use; the cutting resistance is large, so that the cutting is not light enough and the efficiency is low; although the hole drilled by the flat wing drill is smooth when in use, the flat wing drill still has the defects of unsmooth chip removal, incapability of automatically advancing and retreating during drilling, inconvenient cutting due to large cutting resistance, low efficiency and the like.

When a large-outer-diameter hole needs to be drilled, the existing drill bit at least has the following defects: firstly, in the actual drilling processing of wood, a drill bit is easy to slip, so that the centering precision is not accurate, the drill bit is easy to shake and jump, and the smooth finish of the inner surface of a drilled hole is not enough; secondly, the blade edge of the drill bit is designed to be a full-linear edge, the contact area of the blade edge is large when a plate is cut, and the resistance of a cutter is large when the plate is cut, so that the cutter is easy to shake, and the processing quality is influenced; thirdly, sharp points at the design part of the scribing blade are easily worn and even broken, so that the cutter is damaged, the production and the processing are influenced, meanwhile, the cutting resistance is large, the sawdust is difficult to discharge, and a common wood drill is difficult to advance, so that the drill bit is easily broken; fourthly, the ordinary large-outer-diameter woodworking drill can only be scrapped integrally after the drill bit is damaged, the drill bit needs to be replaced integrally when being reused, a large amount of cutter machining materials are wasted, and the use requirement of energy-saving manufacturing cannot be met.

SUMMERY OF THE UTILITY MODEL

In view of the above technical problems, an object of the present invention is to provide a drill for drilling a large outer diameter hole, which can effectively solve the technical problem that the conventional drill is prone to shaking when cutting the large outer diameter hole, has small cutting resistance when in use, improves the positioning stability of the drill to a workpiece, makes the cutting sound of a cutter smaller when in use, and can effectively improve the service life and the processing efficiency of the cutter.

The technical scheme adopted by the utility model is as follows:

a drill bit for drilling a large outer diameter hole, the drill bit comprising a drill body and a shank coupled to the drill body, wherein the drill body has a cylindrical cutting end and the drill body comprises:

three chip grooves; the three chip grooves are uniformly arranged along the cutting end in the same rotating direction;

an alloy center point fixed at the center of the cutting end;

the three alloy blades are fixed on the end face of the cutting end and are distributed around the alloy center point at equal angles by taking the alloy center point as a circle center, and the alloy blades extend linearly from the bottom side of the alloy center point to the edge of the drill body; and the cutting edges of the three alloy blades are all provided with concave-convex connected R cutting edges.

According to the technical scheme, the drill bit can be positioned by the alloy center point when a large-outer-diameter hole is machined and cut, so that the centering accuracy caused by the fact that the drill bit is easy to slip is avoided, and the positioning stability of the drill bit on a workpiece is improved; and the alloy blades uniformly distributed around the alloy center point are uniformly provided with concave-convex connected R cutting edges on the cutting edges, so that the cutting resistance is small when a cutting workpiece is used, the cutter is difficult to shake, the cutting sound of the cutter is smaller when the cutter is used, the cutting speed of the cutter can be accelerated, the technical problem that the drill bit is easy to shake when cutting a large-outer-diameter hole can be effectively solved, and the service life and the processing efficiency of the cutter are improved.

Preferably, the highest points of the convex parts of the R cutting edges of the three alloy blades are staggered with each other on the same cutting circumference; therefore, the contact area between the cutter and the wood can be effectively reduced while the workpiece is drilled, the cutting resistance is further reduced, and the cutting speed of the cutter is accelerated; meanwhile, the concave-convex connected R cutting edges can also play a role in chip breaking, the cutting degree of waste materials is improved so that the cutting waste materials can be discharged from the chip removal grooves, the cutter is not easily damaged, and the service life of the cutter is prolonged while the cutting capacity of the cutter is ensured.

Preferably, in the foregoing technical solution, the radius of the R cutting edge is R, and 0.4mm ≦ R ≦ 1.0 mm. According to the technical scheme, the smaller the radius R value is, the smoother the bottom surface of the hole for processing the plate is; when the radius R value is larger, the cutting resistance is smaller during machining, and the cutting is lighter and faster.

Preferably, in the technical scheme, the three alloy blades correspond to the three chip grooves one by one, and the cutting edge on each alloy blade is uniformly distributed at one side close to the corresponding chip groove; therefore, the alloy blade can be directly discharged through the corresponding chip removal groove after cutting the waste chips, the influence of the waste chips on the cutting end of the drill body on the cutting waste chips of the alloy blade is avoided, the chips can be removed by the drill more smoothly, and the cutting efficiency of the drill is improved.

Above-mentioned technical scheme is preferred, alloy center point inlays to be located the cutting end central point of the brill body puts, so when realizing alloy center point location top tight, can be convenient for alloy center point change, avoids carrying out whole change to the drill bit, can practice thrift cutter processing material.

Preferably, in the above technical solution, the height of the center point of the alloy is H, and 3mm ≦ H ≦ 4 mm. According to the technical scheme, when the height of the center point is higher, the drill bit is more accurately positioned in use, and the machining is more stable.

Preferably, in the technical scheme, the drill body further comprises three alloy scribing edges, and the three alloy scribing edges are uniformly fixed at the edge of the cutting end of the drill body and used for cutting the outer diameter of the machined hole; the positioning design of the alloy center point is combined, so that the cutting stability of the drill bit during drilling of the large-outer-diameter hole can be effectively guaranteed, the cutting efficiency of the drill bit is improved, and the drilled hole is smooth.

Preferably, in the above technical solution, the height of the alloy scribing edge is lower than the alloy center point, and the height of the alloy scribing edge is higher than the alloy blade; therefore, in the drilling process, the alloy center point can contact a workpiece to be processed firstly and fix the center of a hole to be processed, the alloy scribing blade is responsible for pre-cutting the outer diameter of the processed hole, and the alloy blade is used for cutting off the part to be cut off in the middle of the hole to finish processing.

Preferably, the alloy scribing blade is located on the side, away from the cutting edge of the cutting edge, of the alloy blade, and the alloy scribing blade is close to the corresponding chip removal groove, so that the alloy scribing blade and the alloy blade are independent cutting bodies, the cutting process is not affected mutually, and simultaneously, the waste chips are discharged more smoothly.

Preferably, in the above technical solution, the alloy scribing blade has an arc-shaped scribing contour; the alloy marking blade is designed into an arc-shaped cutting edge in the technical scheme, and is more wear-resistant during cutting, so that the cutter is not easy to damage, and the service life of the cutter is prolonged while the cutting capability of the cutter is ensured.

The utility model has at least the following beneficial effects:

1. the drill bit adopts the structural design of the R cutting edges of the three alloy blades which are reasonably arranged and connected in a concave-convex mode, the contact area with a workpiece during cutting can be effectively reduced, the cutting resistance is small when the workpiece is cut, the cutting sound of a cutter is smaller when the cutter is used, the cutting speed of the cutter can be accelerated, the technical problem that the drill bit is easy to shake when the drill bit is used for cutting a large-outer-diameter hole is effectively solved, meanwhile, the R cutting edges connected in the concave-convex mode can play a role in chip breaking, the cutting degree of waste materials is improved, the cutting waste materials are conveniently discharged from a chip removal groove, the cutter is not easy to damage, the cutting capability of the cutter is guaranteed, and the service life of the cutter is prolonged.

2. The alloy center point is used for positioning the circle center of the hole to be machined in the workpiece, the alloy center point can firstly contact the workpiece to be machined and fix the circle center of the hole to be machined in the drilling process, the alloy marking edge is used for pre-cutting the outer diameter of the machined hole, and the alloy blade is used for cutting off the part to be cut off in the middle of the hole to complete machining.

3. According to the drill bit, the alloy blades are respectively in one-to-one correspondence with the chip removal grooves, and the alloy marking edges are also arranged close to the corresponding chip removal grooves, so that the waste chips cut by the alloy blades and the alloy marking edges can be directly discharged through the corresponding chip removal grooves, the waste chips are prevented from influencing the cutting waste chips of the alloy blades at the cutting end of the drill body, the chips can be smoothly removed by the drill bit, the cutting efficiency of the drill bit is improved, and the service life of the drill bit is prolonged

4. The alloy marking edge of the drill bit adopts the arc-shaped cutting edge, has better impact resistance during processing compared with a linear cutting edge, has better impact resistance during processing, is more wear-resistant during cutting, is not easy to damage a cutter, and prolongs the service life of the cutter while ensuring the cutting capability of the cutter.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 shows a side view of a drill bit for drilling a large outer diameter hole according to an embodiment of the present invention;

figure 2 shows a schematic end view of the cutting end of a drill body in an embodiment of the utility model.

In the figure: 1-a drill body; 11-chip removal groove; 2-a drill shank; 3-alloy center point; a 4-alloy blade; 41-R cutting edge; 5-alloy scoring blade.

Detailed Description

The utility model is further described with reference to the following figures and specific embodiments.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Referring to fig. 1 and 2, the present embodiment provides a drill for drilling a large outer diameter hole, for example, for processing wood, the drill includes a drill body 1 and a drill shank 2 connected to the drill body 1, wherein the drill body 1 and the drill shank 2 may be connected by threads, so as to form a split type drill, which is convenient for replacement after the drill is damaged, and does not need to be replaced integrally, thereby effectively saving a large amount of cutting tool processing materials; crucially, the drill body 1 provided by the embodiment has a cylindrical cutting end, and the drill body 1 includes three chip grooves 11, an alloy center point 3 and three alloy blades 4, the three chip grooves 11 are uniformly arranged along the cutting end in the same rotation direction, that is, if the drill body 1 rotates to cut wood along the counterclockwise direction, the three chip grooves 11 are uniformly arranged along the cutting end in the same direction at equal angles, the three alloy blades 4 respectively correspond to the three chip grooves 11 one by one, and the cutting edge of each alloy blade 4 is uniformly arranged at one side of the chip groove 11 close to the corresponding chip groove; therefore, the scraps can be directly discharged through the corresponding scrap discharge groove 11 after the scraps are cut by the alloy blade 4, the influence of the scraps on the cutting ends of the alloy blade 4 at the drill body 1 is avoided, the scraps can be discharged by the drill bit more smoothly, and the cutting efficiency of the drill bit can be effectively improved.

The alloy center tip 3 provided by the embodiment is fixed at the center of the cutting end; preferably, the alloy center point 3 is embedded in the center of the cutting end of the drill body 1, so that the alloy center point 3 can be conveniently replaced while positioning and jacking the wood, the drill bit is prevented from being integrally replaced, and the machining materials of the cutter can be saved; of course, the alloy center point 3 can also be fixed on the drill body 1 by other fixing modes such as welding or threaded connection and the like, and the utility model is within the protection scope; this example provides an alloy center point 3 having a height H, and 3mm H4 mm.

As shown in fig. 2, in the present embodiment, three alloy blades 4 are fixed on the end face of the cutting end, and the three alloy blades 4 are equiangularly distributed around the alloy center 3 with the alloy center 3 as the center, and the alloy blades 4 are linearly extended from the bottom side of the alloy center 3 to the edge of the drill body 1; the cutting edges of the three alloy blades 4 are all provided with concave-convex connected R cutting edges 41; preferably, the highest points of the convex parts of the R cutting edges 41 of the three alloy blades 4 are staggered from each other on the same cutting circumference; therefore, the contact area between the cutter and the wood can be effectively reduced while the workpiece is drilled, the cutting resistance is further reduced, and the cutting speed of the cutter is accelerated; meanwhile, the concave-convex connected R cutting edge 41 can also play a role of chip breaking, the cutting degree of waste materials is improved so that the cutting waste materials can be discharged from the chip groove 11, the cutter is not easy to damage, and the service life of the cutter is prolonged while the cutting capacity of the cutter is ensured.

Further, the radius of the R cutting edge 41 is R, and R is less than or equal to 0.4mm and less than or equal to 1.0 mm; in this embodiment, the smaller the radius R value is, the smoother the bottom surface of the hole in which the plate is processed is; when the radius R value is larger, the cutting resistance is smaller during machining, and the cutting is lighter and faster.

The drill body 1 provided by the embodiment further comprises three alloy scribing edges 5, wherein the three alloy scribing edges 5 are uniformly fixed at the edge of the cutting end of the drill body 1 and are used for cutting the outer diameter of a machined hole; by combining the positioning design of the alloy center point 3, the cutting stability of the drill bit during drilling of a large-outer-diameter hole can be effectively ensured, the cutting efficiency of the drill bit is improved, and the drilled hole is ensured to be relatively smooth; in the illustrated embodiment, the alloy scoring edge 5 is lower in height than the alloy center point 3, and the alloy scoring edge 5 is higher in height than the alloy blade 4; therefore, in the drilling process, the alloy center point 3 can firstly contact a workpiece to be processed and fix the center of a hole to be processed, the alloy scribing edge 5 is used for pre-cutting the outer diameter of the processed hole, and the alloy blade 4 is used for cutting off the part to be cut off in the middle of the hole to finish the processing.

Further, the alloy scribing edge 5 provided by the embodiment is located on one side of the alloy blade 4 departing from the cutting edge of the blade, and the alloy scribing edge 5 is close to the corresponding chip removal groove 11, so that the alloy scribing edge 5 and the alloy blade 4 are independent cutting individuals, the cutting process is not affected mutually, and simultaneously the discharge of waste chips is smoother.

In order to ensure the impact resistance of the alloy scribing blade 5, the scribing outline of the alloy scribing blade 5 provided by the embodiment is arc-shaped; thus, the impact resistance is better when the cutting tool is machined relative to a linear cutting edge, and the cutting tool is more wear-resistant during cutting, so that the cutting tool is not easy to damage, the cutting capability of the cutting tool is ensured, and the service life of the cutting tool is prolonged

With reference to fig. 1 to 2, the drill bit of the present embodiment has the following specific embodiments:

when the drill bit is used for machining a large-outer-diameter hole of wood, the alloy fixed center point 3 can be firstly contacted with a workpiece to be machined and fix the center of the hole to be machined, then the arc-shaped cutting edge on the alloy scribing blade 5 is used for pre-cutting the outer diameter of the machined hole, then the part to be cut in the middle of the hole is cut through the R cutting edge 41 on the alloy blade 4, and the cut waste materials and the like are discharged through the corresponding chip grooves 11 so as to complete wood cutting machining.

The drill bit of the embodiment adopts the alloy center point 3 to position the circular center of the processing hole of the workpiece, and combines the arrangement and the structural design of the three alloy blades 4 and the three alloy scribing edges 5, compared with the traditional drill bit, the drilling capability of the drill bit can be effectively improved, the drill bit is suitable for drilling a large-outer-diameter hole, a cutter is not easy to shake in use, and the drilled hole is smooth and clean and has good quality; and the three alloy blades 4 adopt the structural design of the concave-convex connected R cutting edges 41, the contact area with a workpiece during cutting can be effectively reduced, the cutting resistance is small when the workpiece is cut by using the cutting tool, the cutting sound of the cutting tool is smaller when the cutting tool is used, the cutting speed of the cutting tool can be accelerated, the technical problem that the drill bit is easy to shake when cutting a large-outer-diameter hole is further solved, meanwhile, the concave-convex connected R cutting edges 41 can also play a role in chip breaking, the cutting degree of waste materials is improved so that the cutting waste materials can be discharged from the chip removal groove 11, the cutting tool is not easy to damage, the cutting capability of the cutting tool is ensured, and the service life of the cutting tool is prolonged.

It should be noted that, in the above embodiments, the drill is used for processing a deep hole of a wood material, but the utility model is not limited thereto, and the drill can also be applied to drilling other plastic parts, and is within the protection scope of the utility model; to sum up, the embodiment provides a brand-new drill bit design principle, makes the cutter cutting sound when using littleer, and the marking blade impact resistance is higher, and is more wear-resisting, can effectively improve the life and the machining efficiency of cutter, especially to boring big external diameter hole processing, makes work piece processingquality obtain controlling, shortens product manufacturing cycle, has better popularization practical value, is fit for popularizing and applying.

The present specification and figures are to be regarded as illustrative rather than restrictive, and it is intended that all such alterations and modifications that fall within the true spirit and scope of the utility model, and that all such modifications and variations are included within the scope of the utility model as determined by the appended claims without the use of inventive faculty.

Claims

1. A drill bit for drilling a large outer diameter hole, characterized in that: the drill bit comprises a drill body and a drill handle connected with the drill body, wherein the drill body is provided with a cylindrical cutting end, and the drill body comprises:

an alloy center point fixed at the center of the cutting end;

2. The drill bit for drilling a large outer diameter hole according to claim 1, wherein: the highest points of the convex parts of the R cutting edges of the three alloy blades are mutually staggered on the same cutting circumference.

3. The drill bit for drilling a large outer diameter hole according to claim 1, wherein: the radius of the R cutting edge is R, and R is more than or equal to 0.4mm and less than or equal to 1.0 mm.

4. The drill bit for drilling a large outer diameter hole according to claim 1, wherein: the alloy blades are respectively in one-to-one correspondence with the three chip grooves, and each blade edge on each alloy blade is uniformly distributed on one side of each chip groove close to the corresponding chip groove.

5. The drill bit for drilling a large outer diameter hole according to claim 1, wherein: the alloy center point is embedded in the center of the cutting end of the drill body.

6. The drill bit for drilling a large outer diameter hole according to claim 5, wherein: the height of the center point of the alloy is H, and the height is 3mm to 4 mm.

7. The drill bit for drilling a large outer diameter hole according to any one of claims 1 to 6, wherein: the drill body further comprises three alloy scribing edges which are uniformly fixed at the edge of the cutting end of the drill body and used for cutting the outer diameter of the machined hole.

8. The drill bit for drilling a large outer diameter hole according to claim 7, wherein: the alloy scribing edge is lower in height than the alloy center point, and the alloy scribing edge is higher in height than the alloy blade.

9. The drill bit for drilling a large outer diameter hole according to claim 7, wherein: the alloy scribing blade is positioned on one side, deviating from the cutting edge of the cutting edge, of the alloy blade, and the alloy scribing blade is close to the corresponding chip groove.

10. The drill bit for drilling a large outer diameter hole according to claim 8, wherein: the shape of the scribing outline of the alloy scribing blade is arc.