KR101537666B1 - Gun drill assembly and working method using this - Google Patents

Abstract

The present invention relates to a gun drill assembly and a processing method using the same. The gun drill assembly comprises: a driver which is coupled to a gun drill machine and rotates; a shank portion which extends from the driver by a predetermined length and rotates in cooperation with the driver and in which a chip discharge groove depressed by a predetermined length along a longitudinal direction is formed to guide and discharge chips generated from a process target object; a cemented carbide tip base which is provided at an end portion of the shank portion while a first imaginary circle has a diameter larger than that of the shank portion and forms an outer face formed obliquely or in parallel to the shank portion; and a cemented carbide main tip which extends from an end portion of the cemented carbide tip base while a second imaginary circle extending an outer face circumference has a diameter smaller than that of the cemented carbide tip base and forms an outer face formed obliquely or in parallel to the shank portion, wherein the cemented carbide main tip and the cemented carbide tip base process a deep hole forming a flow path through which plasma gas, extreme low temperature coolant, or ultra high temperature thermal fluid flows, in the process target object. Accordingly, occurrence of level difference of an intermediate portion is minimized, and it is possible to process a deep hole in which a positional degree of an inlet and an outlet is high.

Description

[0001] GUN DRILL ASSEMBLY AND WORKING METHOD USING THIS [0002]

The present invention relates to a gun drill assembly and a machining method using the gun drill assembly. More particularly, the present invention relates to a gun drill assembly and a machining method using the same, which can minimize the occurrence of a step at an intermediate portion and enable deep hole machining with a high degree of position of an entrance and an exit.

(Precision) of the inlet and outlet of the above-mentioned deep hole and the depth of the dipole hole in the manufacturing of the semiconductor or display panel or the manufacturing process of the automobile or the metal mold part, There is an increasing demand for a precise product that minimizes the occurrence of a minor step.

11 is a conceptual view showing the overall structure of a conventional general gun drill assembly.

The gun drill is for machining such a dip hole. The general gun drill includes a driver 10 which is detachably coupled to a touching machine (not shown), a shank 20 extending to the driver 10, a shank 20 And a chip discharge groove 21 is formed in the longitudinal direction of the shank 20 so as to discharge a cutting chip according to the deep hole machining to the end of the cemented carbide tip 30. [

Here, a cutting oil supply hole H through which the cutting oil is supplied along the longitudinal direction is passed through the gun drill.

In this case, the gundrill has a cooling line hole for lowering the temperature of the components in the manufacturing process, a heating hole for inserting the heating pipe for raising the temperature of the component, a steam line hole for moving the steam, An air hole for cooling used in a fluid line hole and a blow mold, a sleeve pin hole used for product removal in an injection mold, and a plasma gas hole for forming a flow path through which a plasma gas flows .

In recent years, the machining length of such various types of application holes has been increased to 1,000 mm or more, and when machining is performed by the gun drill, both sides of the object to be processed are machined and formed.

At this time, steps are generated in the deep holes at the portions where the objects are machined and penetrated from both sides of the object to be processed.

Therefore, in the case of a component requiring a high degree of position of the both ends of the deep hole, according to the Japanese Industrial Standards, when the dynamic accuracy standard of the touch drill machine is passed through the S45C material by about 12 mm to 1,000 mm in order to increase the position accuracy, If the deviation of the inlet and outlet formed in the upper and lower and left and right is within ± 0.5 mm, it is acceptable.

Therefore, the above-described various kinds of application holes may cause the following problems if a step is severely formed in any part of the intermediate part in some cases.

That is, the cooling line holes may not be smoothly flowed at the stepped portions in the flow of the cooling water or the cooling fluid, so that the cooling effect may be deteriorated.

In the case of a heating line hole, the above-mentioned stepped portion may interfere when the heating pipe is inserted through the heating line hole.

In the case of a chemical fluid line hole through which a chemical fluid is passed, clogging of the internal flow path due to accumulation of chemical foreign substances around the step portion may be caused, and in some cases, You may also encounter the problem of replacing itself.

Further, in the case of the plasma gas hole, the plasma gas is scattered around the stepped portion, so that it is difficult to perform the original role of the product.

Therefore, it is urgent to develop an apparatus and a method for maintaining the required product performance, minimizing or eliminating the occurrence of steps, and increasing the degree of position near the entrance and exit of both end portions of the dipole.

Open Utility Model No. 20-1998-0006906

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a gun drill assembly and a method of using the gun drill assembly which are capable of minimizing the occurrence of a step at a central portion and enabling deep hole processing with high degree of position of an inlet and an outlet.

In order to achieve the above object, according to the present invention, there is provided a driving apparatus comprising: a driver detachably coupled to a gun drill machine; A shank portion extending from the driver by a predetermined length and interlocking with the driver and forming a chip discharge groove recessed at a predetermined length along the longitudinal direction to guide and discharge chips generated from the object to be processed; A cemented carbide tip base having a larger diameter than the shank portion and extending at an outer circumference of the shank portion and forming an outer surface parallel or inclined with respect to the shank portion; And a carbide main tip having a diameter smaller than that of the carbide tip base and extending from an end of the carbide tip base and forming an outer surface parallel or inclined with respect to the shank portion, Wherein the carbide main tip and the carbide tip base process a deep hole that forms a flow path through which a plasma gas, a cryogenic coolant, or an ultra-high temperature fluid flows, to the object to be processed.

The cemented carbide tip of the present invention comprises a carbide tipped base coupled to an end of the shank portion and a shank portion extending from the tip of the carbide tip base A first step of mounting a gun drill assembly including a carbide main tip extending in a small width to the gun drill machine; The machined object having a length longer than the total length of the shank portion, the cemented carbide tip base, and the cemented carbide main tip is fixed and arranged in a specific position, a deep hole having a desired diameter along the longitudinal direction of the object to be machined, A second step of aligning an end of the carbide main tip so as to face one side of the object to be processed so as to penetrate the object; The carbide tip having a diameter of an imaginary circle formed by connecting outer edges of the carbide tip base is smaller than the diameter of the carbide tip, the carbide tip being provided at an end of the carbide tip base, A third step of cutting from the side surface to form a first intermediate hole; A carbide main tip provided at an end of a carbide tip base having a second diameter larger than the first diameter and smaller than the target diameter, the carbide main tip being arranged so that the other side of the object to be processed faces the end of the carbide main tip of the gun drill assembly A fourth step of cutting from the other side of the object to form a second intermediate hole aligned with an imaginary center line passing through the center of the first intermediate hole; And a cemented carbide main tip provided at an end of the cemented carbide tip base having the target diameter from the other side of the object to be machined to remove the stepped portion formed by the end of the first intermediate hole and the end of the second intermediate hole, And a fifth step of punching through the second intermediate hole from the other side of the object to form the deep hole by cutting.

According to the present invention as described above, it is possible to minimize the occurrence of steps in the intermediate portion and to perform deep hole processing with high degree of position of the inlet and the outlet.

1 is a conceptual view illustrating the overall structure of a gun drill assembly according to an embodiment of the present invention;
2 is a conceptual view showing the overall structure of a gun drill assembly according to another embodiment of the present invention.
3 is a conceptual diagram illustrating the overall structure of a gun drill assembly according to another embodiment of the present invention.
4 to 9 are conceptual diagrams sequentially illustrating a method of processing using a gun drill assembly according to an embodiment of the present invention.
FIG. 10 is a conceptual view sequentially showing a machining method using a gun drill assembly according to another embodiment of the present invention.
11 is a conceptual view illustrating the overall structure of a conventional general gun drill assembly.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings.

However, the present invention is not limited to the embodiments described below, but may be embodied in various other forms.

The present embodiments are provided so that the disclosure of the present invention is thoroughly disclosed and that those skilled in the art will fully understand the scope of the present invention.

And the present invention is only defined by the scope of the claims.

Thus, in some embodiments, well known components, well known operations, and well-known techniques are not specifically described to avoid an undesirable interpretation of the present invention.

In addition, throughout the specification, like reference numerals refer to like elements, and the terms (mentioned) used herein are intended to illustrate the embodiments and not to limit the invention.

In this specification, the singular forms include plural forms unless the context clearly dictates otherwise, and the constituents and acts referred to as " comprising (or comprising) " do not exclude the presence or addition of one or more other constituents and actions .

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs.

Also, commonly used predefined terms are not ideally or excessively interpreted unless they are defined.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a conceptual view showing the overall structure of a gun drill assembly according to an embodiment of the present invention. FIG. 2 is a conceptual view showing the overall structure of a gun drill assembly according to another embodiment of the present invention. Fig. 7 is a conceptual view showing the overall structure of a gun drill assembly according to an embodiment.

4 to 9 are conceptual views sequentially illustrating a method of using a gun drill assembly according to an embodiment of the present invention, and FIG. 10 is a view illustrating a method of sequentially processing a gun drill assembly according to another embodiment of the present invention It is a conceptual diagram.

For reference, Figs. 4A, 5A, 6A, 7A, 8A, and 9A are a perspective view of the reference block 750, FIG. 3 is a side elevational conceptual diagram viewed from one side 401 or the other side 402 of the object 400 to be processed.

4B, 5B, 6B, 7B, 8B and 9B are sectional views showing one side 401 of the object to be processed 400, Or from the other side 402 of FIG.

(C), Fig. 6 (c), Fig. 7 (c), Fig. 8 (c) and Fig. 9 A plurality of reference blocks 750 spaced apart from each other along the longitudinal direction of the object to be processed 400, and a processing object 400 is seated and fixed.

The gun driver assembly G according to the present invention can be roughly classified into a structure in which the driver 100, the shank portion 200, the carbide tip base 300, and the carbide main tip 500 are sequentially formed .

The driver 100 is detachably coupled to a touching machine (not shown) and rotated.

The shank portion 200 extends from the driver 100 by a predetermined length and rotates interlocked with the driver 100. The shank portion 200 includes a chip discharging portion having a predetermined length along the longitudinal direction to guide and discharge the chip generated from the object to be processed 400, And the groove 210 is formed.

The carbide tip base 300 has a first virtual circle C1 extending around the outer circumference of the carbide tip base 300 and having a larger diameter than the shank portion 200 and is provided at an end portion of the shank portion 200 and parallel to the shank portion 200 Thereby forming an inclined outer surface.

The carbide main tip 500 has a second virtual circle C2 extending around the outer circumference and having a diameter smaller than that of the carbide tip base 300 and extending from the end of the carbide tip base 300, Thereby forming a parallel or inclined outer surface.

Accordingly, the carbide main tip 500 and the carbide tip base 300 process a deep hole 410, which forms a flow path through which the plasma gas, the cryogenic coolant or the ultra-high temperature thermal fluid flows, to the object to be processed 400.

It is to be understood that the present invention may be embodied in many other specific forms without departing from the spirit or scope of the invention.

First, the driver 100 and the shank portion 200, and the shank portion 200 and the carbide tip base 300 may be coupled by brazing.

The carbide tip base 300 is detachably coupled to the shank portion 200 by various methods such as a screw coupling and a coupling according to the engagement of the groove protrusions. It is of course also possible to provide an application and a deformation design.

The chip discharge groove 210 preferably extends from the end of the shank portion 200 to the end of the carbide main tip 500 through the carbide tip base 300 for smooth cutting chip discharge.

The guddle assembly G is passed from the driver 100 through the shank portion 200 and the carbide tip base 300 to the end of the carbide main tip 500 to form a coolant supply hole H ) May be further provided.

1, the outer surface of the cemented carbide tip base 300 is formed so that the diameter of the first imaginary circle C1 decreases from the end side of the shank portion 200 toward the cemented carbide main tip 500 side And a first tapered portion T1 (see a trapezoid formed so as to become narrower from left to right in FIG. 1) formed to be larger.

The outer surface of the carbide main tip 500 is moved from the end side of the carbide tip base 300 toward the end side of the carbide main tip 500 as shown in the drawing, And a second tapered portion T2 (see a trapezoid formed so as to widen toward the right from the outer side in Fig. 1) formed so as to have a smaller diameter.

In FIG. 1, the first taper portion T1 and the second taper portion T2 are shown using different trapezoids because the degree of actual tapering can not be confirmed with the naked eye. The same also applies to Fig. 2 and Fig.

Also, the gun drill assembly G according to the embodiment of FIG. 1 will be referred to as an A type gun drill assembly hereinafter.

On the other hand, in the embodiment of the structure in which the guniller assembly G includes the first tapered portion T1 together with the third tapered portion T3 (see a trapezoid formed so as to narrow from left to right in FIG. 2) May be applied.

The third tapered portion T3 is formed such that the outer surface of the carbide main tip 500 is larger in diameter from the end side of the carbide tip base 300 toward the end side of the carbide main tip 500 .

Also, the gun drill assembly G according to the embodiment of FIG. 2 is hereinafter referred to as a B type gun drill assembly.

Meanwhile, the guddle assembly G includes an embodiment of a structure including a large diameter portion DL (see the "□" shape in FIG. 3) and a small diameter portion DS (see the "□" shape in FIG. 3) It goes without saying that it may be applied.

The diameter of the first imaginary circle C1 is constantly set so that the outer surface of the carbide tip base 300 moves from the end side of the shank portion 200 toward the carbide main tip 500 side.

The small diameter portion DS is formed such that the outer surface of the carbide main tip 500 is formed such that the diameter of the second imaginary circle C2 becomes constant as it goes from the end side of the carbide tip base 300 to the end side of the carbide main tip 500 .

Also, the gun drill assembly G according to the embodiment of FIG. 3 is hereinafter referred to as a C type gun drill assembly.

The A type gun assembly is designed to apply rigid criteria such that the straightness of the deep hole 410 is the top priority and the step 415 in the middle of the deep hole 410 (see FIG. 6) , For example, when machining a heating line hole into which a heating pipe is inserted.

B type gun drill assemblies will be useful in machining parts, such as plasma gas holes, whose surface roughness is more important than straightness.

The C type gunill assembly is not as rigid as the A type gunillery assembly and the B type gunillery assembly described above and the degree of formation of the very minor stepped portion 415 can be achieved with acceptable components such as chemical fluid line holes or plasma gas holes It will be useful when processing.

1, the guddle assembly G includes an inclined surface portion 310 that is inclined from one end of the carbide main tip 500 toward the end side of the carbide tip base 300, And a cutting inclined surface portion 510 formed to be gradually narrowed in a direction away from the other end of the carbide main tip 500. [

The first imaginary line L1 passing through the center of the cutting slope portion 510 is perpendicular to the second virtual imaginary line L1 passing through the center of the carbide main tip 500, the carbide tip base 300, and the shank portion 200 L2.

At this time, the cutting slope portion 510 of the carbide main tip 500 includes the first and second cutting surfaces 511 and 512.

The first cutting surface 511 forms a first angle? 1 with respect to the third imaginary line L3 orthogonal to the first imaginary line L1 and extends obliquely from one point of the first imaginary line L1 will be.

The second cutting plane 512 forms a second angle 2 smaller than the first angle? 1 with respect to the third imaginary line L3 and extends from one point of the first imaginary line L1 to the second imaginary line? L2. ≪ / RTI >

Here, the first angle? 1 and the second angle? 2 are formed to be smaller than the angle? 4 formed by the slanted surface portion 310 with respect to the third imaginary line L3, so that smooth cutting can be achieved.

It is preferable that the cutting slope portion 510 further includes a cutting relief surface 513 so that the cutting chips continuously generated from the object 400 can be smoothly guided toward the chip discharge groove 210 side.

The cutting relief surface 513 forms a third angle? 3 that is greater than the second angle? 2 and smaller than the first angle? 1 and is inclined from the second cutting surface 512 to the edge of the carbide main tip 500 It is extended.

The cutting chips continuously generated from the object to be processed 400 are smoothly guided to the chip discharge groove 210 side through the structure of the first and second cutting faces 511 and 512 and the cutting relief face 513 The distance d1 from the first imaginary line L1 to the outer edge of the second cutting surface 512 is set to be the distance from the first imaginary line L1 to the outer edge of the first cutting surface 511 (d2).

Hereinafter, a method of processing the deep hole 410 using the gun drill assembly G according to various embodiments will be described in detail with reference to FIGS. 4 to 9. FIG.

For reference, reference numerals of the drawings not shown in Figs. 4 to 9 refer to Figs. 1 to 3.

4 to 9, reference numeral 750 denotes a reference block for accurately aligning the object to be processed 400 with the work reference plane 700 to determine the position of the object to be fixed.

The work reference plane 700 includes a first reference plane 710 formed on the upper surface of the reference block 750 and a second reference plane 710 formed on the inner side of the reference step 751 protruding along one side edge of the first reference plane 710 2 reference plane 720.

The reference block 750 is fixed to the object 400 in a state of being fixed to the first and second reference planes 710 and 720 so that the object 400 can be closely fixed to the first and second reference planes 710 and 720, The object to be processed 400 may be aligned and fixed in a state where the object 400 is spaced apart from the object in the longitudinal direction of the object.

First, the operator mounts the touching assembly (G) on the machine to be touched (S1: first step).

Next, the worker fixes and arranges the object 400 having a length longer than the entire length of the shank portion 200, the cemented carbide tip base 300 and the carbide main tip 500 at a specific position, The end of the carbide main tip 500 is aligned with the one side surface 401 of the object to be processed 400 so as to penetrate the dip hole 410 of the desired target diameter DD along the longitudinal direction of the workpiece 400 (S2: second step).

4 and 5, the imaginary circle formed by connecting the outer edges of the cemented carbide tip base 300, that is, the first imaginary circle C1 has a diameter smaller than the target diameter DD, The carbide main tip 500 provided at the end of the carbide tip base 300 is cut from one side 401 of the object 400 to form a first intermediate hole 411 (Step S3: third step).

Next, as shown in FIGS. 6 and 7, the other side 402 of the object to be processed 400 is aligned with the end of the carbide main tip 500 of the gun assembly G so as to face each other, and is larger than the first diameter D1 The carbide main tip 500 provided at the end of the carbide tip base 300 having the second diameter D2 smaller than the target diameter DD is cut from the other side 402 of the workpiece 400, A second intermediate hole 412 arranged on a straight line with an imaginary center line passing through the center of the first intermediate hole 411 is formed (S4: fourth step).

8 and 9, in order to remove the stepped portion 415 in which the end portion of the first intermediate hole 411 and the end portion of the second intermediate hole 412 are brought into mutual contact with each other, Diameter main tip 500 provided at the end of the carbide tip base 300 having the target diameter DD from the other side 402 of the object to be processed 400 through the second intermediate hole 412 So that a deep hole 410 is formed (S5: fifth step).

Here, the first step (S1) to the fifth step (S5) may be repeatedly performed.

At this time, a heating line hole through which the ultra-high temperature thermal fluid flows can be formed through the deep hole 410 of the object to be processed 400 formed by the A type gun.

Plasma gas holes through which the plasma gas flows can be formed through the dip holes 410 of the object to be processed 400 formed by the B type gun drill.

A plasma gas hole through which a plasma gas flows, a cooling line hole through which a cryogenic coolant flows, a chemical fluid line hole through which a chemical flows, and the like are formed through the deep holes 410 of the object to be processed 400 formed by the C type gasket Of course.

The length of the first intermediate hole 411 and the second intermediate hole 412 may be equal to or larger than a half of a distance w from one side 401 of the object 400 to the other side.

At this time, the step formed by the central part of each of the first intermediate hole 411 and the second intermediate hole 412 is 0.1 to 0.5 mm, more preferably, it is 0.3 mm or less to minimize or eliminate the formation of the step 415 .

The plurality of dipoles 410 may be formed through the object to be processed 400 in a vertical or horizontal direction or an unspecified direction on one side 401 or other side of the object 400.

Accordingly, the second step S2, the third step S3, the fourth step S4 and the fifth step S5 are repeated for the number of the formation of the deep hole 410, From the viewpoint of improving the efficiency of the processing of the deep hole 410.

Here, in order to improve the degree of position of both ends of each of the deep holes 410, it is preferable that the positional tolerance of the pitch (p, pitch), which is the distance between the center and the center of each of the plurality of the deep holes 410, is ± 0.1 mm.

The positional tolerance from the work surface 700 (see FIG. 4) on which the object 400 is mounted to the center of the dip hole 410 is set to be ± 0.1 mm .

8 and 9, in order to prevent the leakage of cutting oil due to the operation of the gun assembly G, the fifth step S5 is performed to remove the cutting oil from one side of the object 400 from the inlet of the first intermediate hole 411 It is possible to further perform an operation of forcing the closing plug 600 whose diameter gradually decreases toward the opening 401.

At this time, the sealing plug 600 is separated from the object to be processed 400 with the cutting oil and the cutting chip by the pressure applied by the end portion of the gun assembly (G).

4 to 9, a plurality of the dip holes 410 may be formed on one side 401 or the other side of the object 400 in the up-and-down or left-right direction.

4 to 9, the positional tolerance of the pitch, which is the distance between the center and the center of each of the plurality of the deep holes 410, is ± 0.1 mm, and the deep hole 410 is the object to be processed 400 Or the other side of the trench 415 but lacks the step 415 therein.

As described above, the second step S2, the third step S3, the fourth step S4 and the fifth step S5 are performed in order to improve the efficiency of the process of the deep hole 410, It is preferable to repeat the process after the number of formation of the first electrode 410, and then proceed to the next step. Thus, an embodiment according to the present invention will be briefly described with reference to FIGS. 4 to 9 again.

First, a case will be described in which a dip hole 410 having a target diameter DD is formed to penetrate through two objects in the vertical direction of the object 400. FIG.

After the first and second steps S1 and S2 are completed, the operator forms a first intermediate hole 411 from one side surface 401 as shown in FIG. 4, Thereby forming a hole 411 '(S3: third step).

6, the operator may form a separate second intermediate hole 412 'communicating with the other first intermediate hole 411' from the other side 402 as shown in FIG. 6, And a second intermediate hole 412 communicating with the first intermediate hole 411 is formed (S4: fourth step).

Subsequently, the operator forms a deep hole 410 passing through the second intermediate hole 412 'over the entire length w of the object to be processed 400 as shown in FIG. 8, As shown in FIG. 9, a separate deep hole 410 'passing through the entire length w of the object to be processed 400 is formed from the intermediate hole 412 to complete processing of the deep hole 410 and the separate deep hole 410' (S5: fifth step).

In the present invention, the fifth step S5 of FIG. 8 and FIG. 9 is performed by processing the deep hole 410 and the other deep hole 410 'in the order from the upper side to the lower side of the other side 402 of the object 400 However, it is not necessarily limited to this order.

That is, after the fourth step S4 is completed, another deep hole 410 'and a deep hole 410 may be formed in the order from the bottom to the top of the other side 402.

When the length w of the object to be processed 400 corresponds to the total length l of the gun holder assembly G for forming the dip hole 410, the dip hole 410 is processed can do.

However, when the length w of the object 400 is long, for example, about 2,000 mm, the deep hole 410 should be processed in the same manner as in FIG.

The lengths of the first intermediate hole 411 and the second intermediate hole 412 are not less than half of the distance w from one side surface 401 to the other side surface 402 of the object to be processed 400.

At this time, in the fifth step S5, the total length of the gun drill assembly G having the carbide tip base 300 with the target diameter DD is the same as that of the workpiece 400 Is preferably 2/3 or more of the distance w from the side surface 401 to the other side.

10A, a first intermediate hole 411 is formed on one side 401 of the object 400 and a second intermediate hole 411 is formed on the other side 402 of the object 400, as shown in FIG. 10B. When the first and second intermediate holes 411 and 412 are not communicated with each other even if the second intermediate hole 412 is formed in the second intermediate hole 412, the following additional operation can be further performed.

More specifically, as shown in FIG. 10 (c), the entirety of the deep hole 410 is separated from the other side 402 of the object to be processed 400 by the gun drill assembly G having the carbide tip base 300 having the target diameter DD, Process more than 2/3 of the length.

10 (d), the entire length of the deep hole 410 from the one side surface 401 of the object to be processed 400 to the entire length of the deep hole 410 is measured with the gun drill assembly G having the carbide tip base 300 having the target diameter DD. By processing 1/3 or more, the dip hole 410 can be formed through the object to be processed 400.

As described above, it is understood that the present invention is based on a technical idea to provide a gun drill assembly and a machining method using the same, which minimizes the occurrence of a step at a central portion and enables deep hole processing with a high degree of position of an inlet and an outlet.

It will be apparent to those skilled in the art that many other modifications and applications are possible within the scope of the basic technical idea of the present invention.

100 ... driver
200 ... shank portion
210 ... chip discharge groove
300 ... carbide tipped base
310 ... inclined surface portion
400 ... object
401 ... one side of the object 400
402 ... the other side of the object 400
410 ... Deep hole
411 ... first intermediate hole
412 ... second intermediate hole
415 ... stepped portion
500 ... Carbide Main Tips
510 ... cutting facet
511 ... 1st cutting face
512 ... 2nd cutting face
513 ... cutting relief face
600 ... Closed plug
700 ... working plane
710 ... first reference plane
720 ... second reference plane
750 ... reference block
751 ... reference step
C1 ... 1st virtual circle
C2 ... second virtual circle
DD ... Purpose Diameter
D1 ... first diameter
D2 ... second diameter
DL ...
DS ... small neck
d1 ... the distance from the first imaginary line L1 to the outer edge of the second cutting surface 512
d2 ... distance from the first imaginary line L1 to the outer edge of the first cutting surface 511
G ... Touch Assembly
H ... Coolant supply hole
L1 ... first imaginary line
L2 ... second imaginary line
L3 ... Third virtual line
ℓ ... Overall length of the gun assembly (G)
p ... pitch
S1 ... Step 1
S2 ... Step 2
S3 ... Step 3
S4 ... Step 4
S5 ... Step 5
T1 ... First taper portion
T2 ... second taper portion
T3 ... Third taper portion
? 1 ... first angle
? 2 ... second angle
? 3 ... third angle
? 4 ... an angle formed by the inclined surface portion 310 with respect to the third imaginary line L3
w ... distance from one side 401 of the object 400 to the other side

Claims (23)

A driver that is detachably coupled to the machine to be touched;
A shank portion extending from the driver by a predetermined length and interlocking with the driver and forming a chip discharge groove recessed at a predetermined length along the longitudinal direction to guide and discharge chips generated from the object to be processed;
A cemented carbide tip base having a larger diameter than the shank portion and extending at an outer circumference of the shank portion and forming an outer surface parallel or inclined with respect to the shank portion;
A carbide main tip having a diameter smaller than that of the carbide tip base and extending from an end of the carbide tip base and forming an outer surface parallel or inclined with respect to the shank portion;
The outer surface of the carbide tip base is formed so that the diameter of the first imaginary circle becomes larger toward the carbide main tip side from the end side of the shank portion; And
The outer surface of the carbide main tip has a second taper portion formed so that the diameter of the second imaginary circle decreases from the end side of the carbide tip base toward the end side of the carbide main tip,
Wherein the carbide main tip and the carbide tip base process a deep hole that forms a flow path through which plasma gas, cryogenic coolant or ultra-high temperature fluid flows.
A driver that is detachably coupled to the machine to be touched;
A shank portion extending from the driver by a predetermined length and interlocking with the driver and forming a chip discharge groove recessed at a predetermined length along the longitudinal direction to guide and discharge chips generated from the object to be processed;
A cemented carbide tip base having a larger diameter than the shank portion and extending at an outer circumference of the shank portion and forming an outer surface parallel or inclined with respect to the shank portion;
A carbide main tip having a diameter smaller than that of the carbide tip base and extending from an end of the carbide tip base and forming an outer surface parallel or inclined with respect to the shank portion;
The outer surface of the carbide tip base is formed so that the diameter of the first imaginary circle becomes larger toward the carbide main tip side from the end side of the shank portion; And
The outer surface of the carbide main tip has a third taper portion formed such that the diameter of the second virtual circle increases from the end side of the carbide tip base toward the end side of the carbide main tip,
Wherein the carbide main tip and the carbide tip base process a deep hole that forms a flow path through which plasma gas, cryogenic coolant or ultra-high temperature fluid flows.
A driver that is detachably coupled to the machine to be touched;
A shank portion extending from the driver by a predetermined length and interlocking with the driver and forming a chip discharge groove recessed at a predetermined length along the longitudinal direction to guide and discharge chips generated from the object to be processed;
A cemented carbide tip base having a larger diameter than the shank portion and extending at an outer circumference of the shank portion and forming an outer surface parallel or inclined with respect to the shank portion;
A carbide main tip having a diameter smaller than that of the carbide tip base and extending from an end of the carbide tip base and forming an outer surface parallel or inclined with respect to the shank portion;
The outer side surface of the cemented carbide tip base has a large diameter portion in which the diameter of the first imaginary circle is constantly formed from the end side of the shank portion toward the cemented carbide main tip side; And
Wherein an outer surface of the carbide main tip includes a small diameter portion in which the diameter of the second imaginary circle is constantly formed from the end side of the carbide tip base toward the end side of the carbide main tip,
Wherein the carbide main tip and the carbide tip base process a deep hole that forms a flow path through which plasma gas, cryogenic coolant or ultra-high temperature fluid flows.
delete The method according to any one of claims 1 to 3,
Wherein the chip discharge groove extends from an end of the shank portion through the carbide tip base to an end of the carburetor main tip.
The method according to any one of claims 1 to 3,
The gun-
And a coolant supply hole penetrating from the driver to the end of the carbide main tip through the shank portion and the carbide tip base to form a flow path through which coolant flows.
The method according to any one of claims 1 to 3,
The gun-
An inclined surface section inclined from one end of the carbide main tip toward the end side of the carbide tip base;
And a cutting slope portion formed to be gradually narrowed in a direction away from the other end of the carbide main tip,
Wherein a first imaginary line passing through the center of the cutting slope portion is parallel to a second imaginary line passing through the center of the carbide main tip and the carbide tip base and the shank portion.
The method of claim 7,
The cutting slope portion of the carbide main tip,
A first cutting surface which forms a first angle with respect to a third imaginary line orthogonal to the first imaginary line and extends obliquely from one point of the first imaginary line,
And a second cutting surface extending obliquely from one point of the first imaginary line to the second imaginary line, the second cutting surface being at a second angle smaller than the first angle with respect to the third imaginary line,
Wherein the first angle and the second angle are smaller than the angle formed by the inclined plane portion with respect to the third imaginary line.
The method of claim 8,
The cutting slope portion
Further comprising a cutting relief surface extending at a third angle that is greater than the second angle and less than the first angle and that extends obliquely from the second cutting surface to the edge of the carbide main tip.
The method of claim 8,
Wherein the distance from the first imaginary line to the outer edge of the second cutting surface is greater than the distance from the first imaginary line to the outer edge of the first cutting surface.
A shank portion extending from the driver by a predetermined length; a cemented carbide tip base coupled to an end of the shank portion; a cemented carbide tip extending from an end of the cemented carbide tip base to a width smaller than the cemented carbide tip base A first step of mounting a gun drill assembly including the carbide main tip to the touch screen machine;
The machined object having a length longer than the total length of the shank portion, the cemented carbide tip base, and the cemented carbide main tip is fixed and arranged in a specific position, a deep hole having a desired diameter along the longitudinal direction of the object to be machined, A second step of aligning an end of the carbide main tip so as to face one side of the object to be processed so as to penetrate the object;
The carbide tip having a diameter of an imaginary circle formed by connecting outer edges of the carbide tip base is smaller than the diameter of the carbide tip, the carbide tip being provided at an end of the carbide tip base, A third step of cutting from the side surface to form a first intermediate hole;
A carbide main tip provided at an end of a carbide tip base having a second diameter larger than the first diameter and smaller than the target diameter, the carbide main tip being arranged so that the other side of the object to be processed faces the end of the carbide main tip of the gun drill assembly A fourth step of cutting from the other side of the object to form a second intermediate hole aligned with an imaginary center line passing through the center of the first intermediate hole; And
And a step of cutting the carbide main tip provided at the end of the carbide tip base having the target diameter from the other side of the object to be machined to remove the stepped portion formed by the end of the first intermediate hole and the end of the second intermediate hole, And a fifth step of punching through the second intermediate hole from the other side of the first intermediate hole to form the dip hole.
The method of claim 11,
Wherein the first virtual circle extending around the outer surface of the carbide tip base has a larger diameter than the shank portion and the carbide tip base forms an outer surface parallel or inclined with respect to the shank portion,
Wherein the second virtual circle extending around an outer surface of the carbide main tip has a smaller diameter than the carbide tip base and the carbide main tip forms an outer surface parallel or inclined with respect to the shank portion. Processing method used.
The method of claim 11,
The gun-
The outer surface of the cemented carbide tip base has a first tapered portion formed such that the diameter of the first imaginary circle becomes larger toward the cemented carbide main tip side from the end side of the shank portion,
The outer surface of the carbide main tip has a second taper portion formed so that the diameter of the second imaginary circle decreases from the end side of the carbide tip base toward the end side of the carbide main tip,
Wherein an ultra-high temperature thermal fluid flows through the deep hole of the object to be processed.
The method of claim 11,
The gun-
The outer surface of the cemented carbide tip base has a first tapered portion formed such that the diameter of the first imaginary circle becomes larger toward the cemented carbide main tip side from the end side of the shank portion,
The outer surface of the carbide main tip has a third taper portion formed such that the diameter of the second virtual circle increases from the end side of the carbide tip base toward the end side of the carbide main tip,
And a plasma gas flows through the deep hole of the object to be processed.
The method of claim 11,
The gun-
Wherein an outer side surface of the carbide tip base has a larger diameter portion in which the diameter of the first virtual circle is constantly formed from the end side of the shank portion toward the carbide main tip side,
Wherein an outer surface of the carbide main tip includes a small diameter portion in which the diameter of the second imaginary circle is constantly formed from the end side of the carbide tip base toward the end side of the carbide main tip,
Wherein a plasma gas, a cryogenic coolant, or a chemical agent flows through the deep holes of the object to be processed.
The method of claim 11,
Wherein a length of the first intermediate hole and a length of the second intermediate hole are not less than 1/2 of a distance from one side to the other side of the object.
The method of claim 11,
Wherein a step formed by the central portion of each of the first intermediate hole and the second intermediate hole is 0.1 to 0.5 mm.
The method of claim 11,
Wherein the dip hole is formed in a plurality of through holes of the object in a vertical or horizontal direction or an unspecified direction on one side or the other side of the object,
Wherein the second step, the third step, the fourth step, and the fifth step are repeatedly performed by the number of the deep holes, respectively, and then proceed to the next step.
19. The method of claim 18,
Wherein a positional tolerance of the pitch, which is the distance between the center and the center of each of the plurality of dipoles, is +/- 0.1 mm.
The method of claim 11,
Wherein the positional tolerance from the work surface to which the object is mounted to the center of the deep hole is +/- 0.1 mm.
The method of claim 11,
In the fifth step,
Further comprising inserting a sealing plug whose diameter gradually decreases from the inlet of the first intermediate hole toward one side of the object to prevent leakage of cutting oil due to the operation of the gun drill assembly,
Wherein the sealing plug is separated from the object by a pressure exerted by an end of the gun assembly.
The method according to any one of claims 11 to 21,
Wherein a plurality of the dip holes are formed on one side or the other side of the object to be processed in an up-and-down or a left-right direction, and a positional tolerance of a pitch as a distance between the center and the center of each of the plurality of dipoles is +/- 0.1 mm, Wherein the dip hole penetrates one side surface or the other side surface of the object to be processed, and a step is missing in the dip hole.
The method of claim 11,
The length of the first intermediate hole and the second intermediate hole is not less than 1/2 of a distance from one side to the other side of the object,
The total length of the gun drill assembly having the carbide tip base having the target diameter in the fifth step is 2/3 or more of the distance from one side to the other side of the object,
And a cantilever assembly having a cemented carbide tip base having a desired diameter, the cemented carbide tip is formed by machining at least 2/3 of the entire length of the dipole from the other side of the object,
Characterized in that the deep hole is formed through the object to be processed by machining at least one third of the entire length of the deep hole from one side of the object with a gun drill assembly having a carbide tip base having the target diameter, .

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