CN217913010U

CN217913010U - Deep hole twist drill with composite blade

Info

Publication number: CN217913010U
Application number: CN202221696019.0U
Authority: CN
Inventors: 张伟; 王威舒; 申玉良
Original assignee: Dalian Jirui Knife Technology Co ltd
Current assignee: CHANGZHOU JIRUI KNIFE TECHNOLOGY CO LTD
Priority date: 2022-07-04
Filing date: 2022-07-04
Publication date: 2022-11-29
Anticipated expiration: 2032-07-04

Abstract

The utility model relates to a metal cutting tool technical field just discloses a compound sword deep hole fluted drill, including stalk portion, interior cold hole, slot, margin, clearance, drill point, inside cold hole of having seted up between stalk portion and the drill point, drill point department has seted up two slots to stalk portion one end, and the slot is the heliciform, the slot outside is provided with two margins, and is provided with the clearance between two margins, the margin plays the blade part of drilling effect and is formed by outer sword, circular arc sword and interior sword complex, the utility model discloses, through the margin that sets up, compound sword design makes the cutter have outstanding centering ability to improve the position precision of spot facing work.

Description

Deep hole twist drill with composite blade

Technical Field

The utility model relates to a metal cutting tool technical field especially relates to a compound sword deep hole fluted drill.

Background

The integral hard alloy inner-cooling deep hole twist drill is a deep hole machining tool commonly used at present, and is gradually popularized in recent years. With the continuous improvement of the requirement on the machining efficiency, the traditional deep hole machining tool, such as a gun drill, a high-speed steel twist drill and the like, can not completely meet the requirement on high-efficiency deep hole machining, and the problem can be well solved by the integral hard alloy inner-cooling deep hole twist drill.

Deep hole machining generally refers to the field of hole machining with a large hole depth and a large hole diameter, and deep hole twist drills are generally applied to the condition that the hole diameter ratio is 8-25. The cutting edge of a common deep-hole twist drill only has the characteristics of an inner edge and an outer edge, and is not provided with an arc edge, the cutting edge is gradually worn along with the extension of the processing time, the chip breaking effect is reduced along with the abrasion, long-strip-shaped chips are easily generated, the chips are not easily discharged from the processed holes, and the risk of cutter breaking is increased. The deep hole twist drill with the composite edge is characterized in that the cutting edge is formed by compounding an outer edge, an inner edge and an arc edge, the effect of forced chip breaking can be achieved during machining, and the chip breaking effect is good in the complete service life of the deep hole twist drill, so that the risk of cutter breaking is reduced to a certain extent.

Therefore, a composite-edge deep-hole twist drill is provided.

SUMMERY OF THE UTILITY MODEL

The utility model discloses solve the technical problem that above-mentioned prior art exists, provide a compound sword deep hole fluted drill.

In order to realize the purpose, the utility model discloses a following technical scheme, a compound sword deep hole fluted drill includes stalk portion, interior cold hole, slot, margin, clearance, drill point, inside interior cold hole of having seted up between stalk portion and the drill point, two slots have been seted up to stalk portion one end to drill point department, and the slot is the heliciform, the slot outside is provided with two margins, and is provided with the clearance between two margins, the margin plays the blade part of drilling effect and is formed by outer sword, circular arc sword and interior sword complex.

Preferably, the number of the internal cooling holes is two, the two internal cooling holes are spirally staggered, and the groove is formed between the two internal cooling holes.

Preferably, the central thickness Φ c, defined between two of said grooves is 0-10mm, the size of which is characterized by a variation along the axis.

Preferably, the surface of the groove is polished to have a mirror surface characteristic, and the surface roughness should be less than 0.02.

Preferably, the margin is of a double-edge structure, i.e. each land has two edges, the angle between the two edges is A, A is 0-45 degrees, the width of the edge is W, W is 0.02-0.1 d, d is the diameter length, and d is 5-10mm.

Preferably, the groove is located between two lands, the groove having a depth m below the outer circle.

Preferably, the geometrical parameters of the drill tip comprise that the angle of the outer edge 2f and 2f is 120-135 degrees, the angle of the inner edge 2f tau and 2f tau is 120-135 degrees, the length of the outer edge l and l is 0.2d-0.3d, d is the diameter length, the height of the tip h and h is 0.02d-0.03d, the radius of the circular edge R and R is 0.1d-0.3d, the relief angle of the outer edge alpha 1 and alpha 1 is-10 degrees, the relief angle of the inner edge alpha 2 and alpha 2 is 0-15 degrees, the relief angle of the circular edge alpha 3 and alpha 3 is 10-20 degrees, and the rake angle of the inner edge gamma and gamma are-15-20 degrees.

Preferably, the geometrical parameters of the drill tip end surface comprise a chisel edge oblique angle y, y is 50-65 degrees, an inner edge oblique angle tau, tau is 20-30 degrees, an inner edge arc r is 0.05d-0.2d, and the chisel edge length l is 0.02d-0.05d.

Advantageous effects

The utility model provides a compound sword deep hole fluted drill. The method has the following beneficial effects:

1. this compound sword deep hole fluted drill, through the margin that sets up, compound sword design makes the cutter have outstanding centering ability to improve spot facing work's position accuracy.

2. This compound sword deep hole twist drill through cutting edge, slot, the clearance that sets up, compound sword design makes the cutter have fine chip-breaking effect to need not repeated back sword chip removal, avoid pecking formula processing, greatly improved machining efficiency.

3. This compound sword deep hole fluted drill through interior cold hole, slot, the clearance that sets up, is applicable to coolant oil, emulsion cooling processing operating mode, especially is applicable to minimum oil mist cooling (MQL), green.

4. This compound sword deep hole fluted drill through the design and the processing method that set up, can let the utility model provides a complicated high-efficient drill point obtains efficient numerical control sharpening, realizes batch production's purpose.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

Fig. 1 is a front view of the present invention;

fig. 2 is a cross-sectional view of the present invention;

FIG. 3 is a partial view of a drill tip of the present invention;

FIG. 4 is an end view of a drill tip portion of the present invention;

fig. 5 is a software design interface of the present invention.

Illustration of the drawings:

1. a handle; 2. an internal cooling hole; 3. a trench; 4. a land; 5. a gap; 6. and (6) drilling a tip.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example (b): a deep hole twist drill with a composite edge is shown in figures 1-4 and comprises a handle portion 1, an inner cooling hole 2, grooves 3, blade zones 4, a gap 5 and a drill point 6, wherein the inner cooling hole 2 is formed inside the handle portion 1 and the drill point 6, the drill point 6 is provided with two grooves 3 towards one end of the handle portion 1, the grooves 3 are spiral, two blade zones 4 are arranged on the outer sides of the grooves 3, the gap 5 is formed between the two blade zones 4, and a cutting edge portion of each blade zone 4 for drilling is formed by compounding an outer edge, an arc edge and an inner edge. Two inner cooling holes 2 are arranged, the two inner cooling holes 2 are spirally staggered, and the groove 3 is positioned between the two inner cooling holes 2. The central thickness Φ c, formed between the two grooves 3, is 0-10mm, the size of which is characterized by a variation along the axis. The surface of the groove 3 is polished to have a mirror surface characteristic, and the surface roughness is less than 0.02. The cutting edge 4 is of a double-blade structure, namely each blade is provided with two blades, the angle between the two blades is A, the angle A is 0-45 degrees, the width of the blade is W, the diameter of W is 0.02d-0.1d, the diameter of d is 5-10mm. The groove 3 is located between two lands 4, the groove 3 having a depth m below the outer circle. The geometrical parameters of the drill point 6 comprise that the sharp angle 2f and 2f of the outer blade is 120-135 degrees, the sharp angle 2f tau of the inner blade is 120-135 degrees, the length l of the outer blade is 0.2d-0.3d, d is the diameter length, the sharp height h is 0.02d-0.03d, the radius R of the circular blade is 0.1d-0.3d, the back angle alpha 1 of the outer blade is-10 degrees, the back angle alpha 2 of the inner blade is 0-15 degrees, the back angle alpha 3 of the circular blade is 10-20 degrees, the front angle gamma of the inner blade is-15-20 degrees. The geometrical parameters of the end face of the drill tip 6 comprise a chisel edge oblique angle y, wherein y is 50-65 degrees, an inner edge oblique angle tau is 20-30 degrees, an inner edge arc r is 0.05d-0.2d, and the length l of the chisel edge is 0.02d-0.05d.

Further, as shown in fig. 5, the utility model discloses numerical control sharpening method changes its grinding parameter and program control through five numerical control tool grinding machines according to the design requirement, verifies through three-dimensional simulation, finally reaches theoretical requirement.

Further, the utility model discloses an use the difficult processing material stainless steel of drilling as an example, selected the angle parameter including outer sword peak angle, interior sword peak angle of drill point 6 in figure 2 to and selected the length parameter including outer sword length, circular arc sword radius and point height, and propose the design drawing.

Further, selecting a chip breaking type drill point in NUM software according to the selected parameters, inputting four main parameters of an outer drill point angle, a diameter of a chip breaking position and a chip breaking radius required by design on a parameter interface of the drill point 6 according to prompts and design requirements, inputting a numerical value of subtracting an outer edge peak angle of the drill point 6 from 360 degrees in the outer drill point angle, inputting a numerical value of an inner edge peak angle of the drill point 6 in the drill point angle, inputting a chip breaking radius into a circular arc edge radius of the drill point 6, and determining the value of the chip breaking radius according to the point height and the outer edge length.

And further, after the parameters are input, performing simulation verification, measurement and modification on a simulation interface of NUM software to complete the design of the program.

And further, a grinding wheel, grinding parameters and the like used for grinding various characteristics are configured, and a composite-blade deep-hole twist drill product with design characteristics is machined by utilizing a five-axis numerical control tool grinding machine.

The utility model discloses a theory of operation: the utility model discloses utilize NUM software, combine ordinary twist drill point 6 and chip breaking formula point, through each item parameter of revising chip breaking formula point, like the point angle, the diameter of chip breaking department etc. reaches the purpose at ordinary twist drill's back knife face coping arc groove, can fall into the three-section with the cutting edge of point like this, can make the smear metal be divided into the three-section when the chip breaking, more do benefit to the chip breaking, difficult discharge's smear metal such as reduction spiral roll that simultaneously can be better produces, thereby the better cutting force that reduces the knife tip and receive, furthermore, through the adjustment parameter, can reduce the length of nose department chisel edge, because the chisel edge contacts the work piece at drilling in-process foremost, play a centering's effect, consequently most easily wearing and tearing, and this kind of novel point is owing to reduced the chisel edge, can reduce the wearing and tearing of cutter effectively, improve the life-span of cutter.

The foregoing shows and describes the basic principles and principal features of the invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a compound sword deep hole twist drill, includes stalk portion (1), interior cold junction (2), slot (3), land (4), clearance (5), drill point (6), its characterized in that: the inner cooling hole (2) is formed in the inner portion between the handle portion (1) and the drill point (6), two grooves (3) are formed in the drill point (6) towards one end of the handle portion (1), the grooves (3) are spiral, two blade zones (4) are arranged on the outer sides of the grooves (3), a gap (5) is formed between the two blade zones (4), and the cutting edge portion of each blade zone (4) playing a drilling role is formed by compounding an outer blade, an arc blade and an inner blade.

2. A composite-edge deep-hole twist drill according to claim 1, wherein: the inner cooling holes (2) are arranged in two numbers, the two inner cooling holes (2) are spirally staggered, and the groove (3) is located between the two inner cooling holes (2).

3. A composite-edge deep-hole twist drill according to claim 1 or 2, wherein: the central thickness Φ c, formed between two of said grooves (3) is 0-10mm, the size of which is characterized by a variation along the axis.

4. A composite-edge deep-hole twist drill according to claim 1 or 2, wherein: the surface of the groove (3) is polished to have a mirror surface characteristic, and the surface roughness is less than 0.02.

5. A composite-edge deep-hole twist drill according to claim 1, wherein: the cutting edge (4) is of a double-blade structure, namely each blade is provided with two blades, the angle between the two blades is A, the angle A is 0-45 degrees, the width of the blade is W, the diameter of the blade is 0.02d-0.1d, the diameter of the blade is d is 5-10mm.

6. A composite-edge deep-hole twist drill according to claim 1 or 5, wherein: the groove (3) is located between the two margins (4), and the groove (3) has a depth m lower than the outer circle.

7. A composite-edge deep-hole twist drill according to claim 1, wherein: the geometrical parameters of the drill point (6) comprise that the outer edge angle 2f and 2f is 120-135 degrees, the inner edge angle 2f tau and 2f tau are 120-135 degrees, the outer edge length l and l are 0.2d-0.3d, d is the diameter length, the point height h and h are 0.02d-0.03d, the arc edge radius R and R are 0.1d-0.3d, the outer edge relief angle alpha 1 and alpha 1 are-10 degrees, the inner edge relief angle alpha 2 and alpha 2 are 0-15 degrees, the arc edge relief angle alpha 3 and alpha 3 are 10-20 degrees, and the inner edge relief angle gamma and gamma are-15-20 degrees.

8. A composite-edge deep-hole twist drill according to claim 1, wherein: the geometrical parameters of the end surface of the drill point (6) comprise a chisel edge oblique angle y, wherein y is 50-65 degrees, an inner edge oblique angle tau, tau is 20-30 degrees, an inner edge arc r is 0.05d-0.2d, and the length l of the chisel edge is 0.02d-0.05d.