KR20150011148A - A system for controlling drilling tool and a method using the same - Google Patents

Abstract

According to the present invention, a system for controlling a drilling tool includes: an input unit configured to receive drilling machining conditions; a surface extracting unit configured to extract a surface which a drilling tool enters and the bottom surface of a hole cut by the drilling tool from modeling data including the shape information of a workpiece to be drilled; a coordinate data calculating unit configured to calculate the coordinates of the center point of the bottom surface and the coordinates of the intersection between the surface and a vertical axis perpendicular to the bottom surface and passing through the center point; and a vector data calculating unit configured to calculate a position vector of the drilling tool using the center point coordinates and the intersection coordinates.

Description

Technical Field [0001] The present invention relates to a drilling tool control system and a drilling tool control method using the same,

The present invention relates to a drilling tool control system and a drilling tool control method using the same.

Currently, 5-axis machining technology using three linear straight shafts and two rotation shafts is used to process complex workpieces. Since 5-axis machining is complicated to control posture of machining tools, CAM (Computer Aided Manufacturing) S / W is used for machining.

In general products and molds, holes often have to be formed in the workpiece with a depth that is deeper than the diameter in order to join the parts or to function the workpiece itself.

However, there are only some types of CAM S / W currently used that support the function of machining holes formed perpendicular to the workpiece surface. Therefore, it is necessary to trial and error in order to process holes formed at a certain angle with the surface using current CAM S / W.

SUMMARY OF THE INVENTION The present invention provides a drilling tool control system and a drilling tool control method using the drilling tool control system, which can easily process holes and curved surfaces perpendicular to a curved surface and a plane, .

The technical objects of the present invention are not limited to the technical matters mentioned above, and other technical subjects not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a drilling tool control system including an input unit for inputting drilling conditions, a surface on which a drilling tool enters from modeling data including shape information of a workpiece to be drilled, A coordinate extracting unit for extracting a bottom surface of a hole cut by a drilling tool; a coordinate data calculating unit for calculating coordinates of a center point of the bottom surface and an intersection point of a vertical axis passing through the center point and the surface perpendicular to the bottom surface; And a vector data operation unit for calculating the posture vector of the drilling tool using the coordinates of the center point and the coordinates of the intersection.

According to an aspect of the present invention, there is provided a method of controlling a drilling tool, the method comprising: inputting drilling conditions; extracting a surface on which the drilling tool enters from modeling data including shape information of a workpiece to be drilled; Extracting a bottom surface of a hole cut by the drilling tool from the modeling data; calculating coordinates of a center point of the bottom surface; calculating a center point of the hole, passing through a center point of the bottom surface, Computing an intersection point coordinate between the vertical axis and the surface; and computing an attitude vector of the drilling tool using the center point coordinate and the intersection point coordinates.

The embodiments of the present invention have at least the following effects.

That is, a non-skilled person can easily process a hole in a workpiece having a complicated shape, and can easily process a hole having a curved surface and a hole perpendicular to the plane, a curved surface and a hole having a predetermined angle with the plane.

In addition, even if the hole is machined to a workpiece having a narrow width in comparison with the height, the trial and error can be minimized and the machining can be performed stably.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the specification.

1 is a block diagram illustrating a drilling tool control system in accordance with an embodiment of the present invention.
2 is an exploded perspective view showing an example of a closed impeller.
3 is a view illustrating a drilling processing condition input screen of an input unit of the drilling tool control system according to an embodiment of the present invention.
4 is a bottom view of a shroud surface and a screw hole extracted by a surface extracting unit of a drilling tool control system according to an embodiment of the present invention.
5 is a view illustrating a process of calculating the surface coordinates of the body by the CC data operation unit of the drilling tool control system according to the embodiment of the present invention.
FIG. 6 is a diagram illustrating a process of calculating a stop point coordinate of a body by a CC data operation unit of a drilling tool control system according to an embodiment of the present invention.
7 is a top view of a cover extracted by a surface extracting unit of a drilling tool control system according to an embodiment of the present invention.
8 is a bottom view of a cover extracted by a surface extracting unit of a drilling tool control system according to an embodiment of the present invention.
9 is a diagram illustrating a process of calculating center point coordinates of a first area and a second area of a cover by a CC data operation unit of a drilling tool control system according to an embodiment of the present invention.
10 is a view illustrating a process of calculating coordinates of a stop point of a cover by a CC data operation unit of a drilling tool control system according to an embodiment of the present invention.
11 is a view showing the top surface of the cover extracted by the surface extracting unit of the drilling tool control system and the bottom surface of the receiving groove according to the embodiment of the present invention.
12 is a view illustrating a process of calculating the surface coordinates of the upper surface by the CC data operation unit of the drilling tool control system according to an embodiment of the present invention.
FIG. 13 is a diagram illustrating a process of calculating coordinates of a stop point of a receiving groove by a CC data operation unit of a drilling tool control system according to an embodiment of the present invention.
14 is a flowchart showing a drilling tool control method according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. &Quot; and / or "include each and every combination of one or more of the mentioned items. ≪ RTI ID = 0.0 >

Although the first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical scope of the present invention.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms " comprises "and / or" comprising "used in the specification do not exclude the presence or addition of one or more other elements in addition to the stated element.

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 explicitly defined otherwise.

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

1 is a block diagram illustrating a drilling tool control system in accordance with an embodiment of the present invention.

1, a drilling tool control system 1 according to an embodiment of the present invention includes an input unit 10, a cutting information providing unit 20, a plane extracting unit 30, a CC (Cutter Contact) data An operation unit 40, a CL (Cutter Location) data operation unit 50, a post-processing unit 60, and a control unit 70.

The input unit 10 is a component that receives rough drilling conditions, and the cutting information providing unit 20 is a component that provides detailed cutting information based on the drilling conditions input through the input unit 10.

The CC data calculating unit 40 is a component for calculating the coordinate values of the tool. The CL data calculating unit 50 calculates the coordinate values of the posture of the tool It is a component that computes a value.

The post-processing unit 60 is a component for converting the operation results of the CC data operation unit 40 and the CL data operation unit 50 into NC (Numerical Control) data recognized by the control unit 70 that controls the drilling tool.

For convenience of explanation of the drilling tool control system 1 according to an embodiment of the present invention, each component of the drilling tool control system 1 will be described in detail by taking the case of processing a closed impeller as an example.

2 is an exploded perspective view showing an example of a closed impeller.

As shown in FIG. 2, the closed impeller 1000 includes a body 100 and a cover 200.

The body 100 includes a hub 110 having a concave frusto-conical shape and a plurality of blades 120 radially protruding on a side of the hub 110.

2, the right side of the blade 120 forms a pressure surface 122 that pressurizes the fluid, and the left side forms a suction surface 121 that draws fluid. A shroud surface 123 forming the upper surface of the blade 120 is provided between the pressing surface 122 and the suction surface 121. A plurality of first screw holes 124 are formed in the shroud surface 123 and a first pinhole 125 is formed on the shroud surface 123 at least in part of the blades 120.

The cover 200 is a tubular member having a center through which a diameter is nonlinearly widened from the upper part to the lower part and may be provided to cover a part of the blade 120. A plurality of through holes 224 corresponding to the first pin hole 125 and a plurality of first screw holes 124 formed on the shroud surface 123 of the blade 120 are formed on the side surface of the cover 200, A pinhole 225 is formed.

A plurality of first screw holes 124 formed in the shroud surface 123 and a plurality of through holes 224 formed in the cover 200 correspond to screws And the pin holes 125 and 225 correspond to each other and serve as alignment references for the plurality of first screw holes 124 and the plurality of through holes 224. [

The first pin hole 125 and the second pin hole 125 formed in the shroud surface 123 of the blade 120 and the through hole 224 and the second pin hole 125 formed in the side surface of the cover 200, The drilling tool control system 1 according to an embodiment of the present invention will be described.

3 is a view illustrating a drilling processing condition input screen of an input unit of the drilling tool control system according to an embodiment of the present invention.

The input unit 10 can receive rough drilling conditions through the drilling conditions input screen.

3, the drilling conditions include a number of holes in the information box 11, a number of blades, a hole depth, a pinhole depth, A number of pin holes and a rapid moving speed Rapid_Feedrate and a tool material, an impeller material and a hole diameter in a material box 12 and a body box Depth (Drill), the pre-machining allowance (Retract), and the offset distance (Offset) in the cover box 14 and the cover box 14, ), And the like.

Rapid_Feedrate refers to the feed rate at which the drilling tool is moved to a specific position for cutting. The maximum depth of cut (Depth (cut), Depth (center), Depth (drill) Means the maximum depth at which the cutting tool is machined into entry and the offset distance means the minimum distance to keep the workpiece when the drilling tool is moved to a specific position for cutting.

3, the modeling data including the shape information of the body 100 and the cover 200 may be input in advance and displayed at the lower portion of the information box 11.

The number of holes, the number of blades, the hole depth, the pinhole depth, the number of pin holes, and the number of holes input into the information box 11, May be reflected in real time on the modeling data including the shape information for the body 100 and the cover 200 and displayed at the lower part of the information box 11. Thus, the user can visually confirm whether or not the information input in the information box 11 matches the processing conditions suitable for the user's intention.

On the other hand, the cutting information providing unit 20 provides detailed cutting information based on the drilling processing conditions input through the input unit 10.

For example, the cutting information providing unit 20 can obtain the optimum cutting speed m (m) based on the tool material, the impeller material, and the hole diameter inputted through the input unit 10 / min < / RTI >

For this purpose, the cutting information providing unit 20 is provided with recommended cutting tools such as the tool material, the impeller material, and the drilling diameter, as shown in [Table 1] and [Table 2] A database for conditions can be provided.

Table 1 shows the recommended cutting conditions for steel, cast iron (HB350) and aluminum (AL) according to the diameter of the HSS drill. Table 2 shows the results of steel cutting, HB350) and aluminum (AL).

H
S
S
De
reel Steel Castings (HB350) Aluminum (AL) Cutting speed Revolutions
(rpm) Feeding speed Cutting speed Revolutions
(rpm) Feeding speed Cutting speed Revolutions
(rpm) Feeding speed diameter Rotation Per minute Rotation Per minute Rotation Per minute 2 20 3180 0.04 127 23 3660 0.06 219 25 3980 0.06 238 3 24 2550 0.05 127 26 2760 0.08 220 30 3180 0.08 254 4 25 1990 0.06 119 28 2230 0.08 178 40 3180 0.10 318 5 25 1590 0.08 127 28 1780 0.10 178 50 3180 0.10 318 6 25 1330 0.10 133 28 1490 0.12 178 60 3180 0.12 381 7 25 1140 0.10 114 28 1270 0.14 177 65 2950 0.14 413 8 25 990 0.12 118 28 1110 0.16 177 70 2780 0.16 444 9 25 880 0.14 123 28 990 0.20 198 72 2540 0.18 457 10 25 790 0.16 126 28 890 0.24 213 75 2390 0.20 478 12 25 660 0.18 118 28 740 0.24 177 75 1990 0.20 398 14 25 570 0.2 114 28 640 0.26 166 78 1770 0.22 389 16 25 500 0.22 110 28 560 0.30 168 78 1550 0.24 372 18 25 440 0.24 105 28 500 0.34 170 78 1380 0.28 386 20 25 400 0.26 104 28 450 0.40 180 78 1240 0.32 396 22 25 360 0.28 100 28 410 0.40 164 78 1130 0.36 406 24 25 330 0.30 99 28 370 0.40 148 78 1030 0.40 412 26 25 310 0.30 93 28 340 0.40 136 78 950 0.40 380 28 25 280 0.30 84 28 318 0.40 127 78 890 0.40 356 30 25 270 0.30 81 28 300 0.40 120 78 830 0.40 332 35 25 230 0.30 69 28 250 0.40 100 78 710 0.40 284 40 25 200 0.30 60 28 220 0.40 88 78 620 0.40 248 45 25 180 0.30 54 28 200 0.40 80 78 550 0.40 220 50 25 160 0.30 48 28 180 0.40 72 78 500 0.40 200

second
circa
De
reel Steel Castings (HB350) Aluminum (AL) Cutting speed Revolutions
(rpm) Feeding speed Cutting speed Revolutions
(rpm) Feeding speed Cutting speed Revolutions
(rpm) Feeding speed diameter Rotation Per minute Rotation Per minute Rotation Per minute 4 28 2230 0.06 134 28 2230 0.06 134 180 14320 0.08 1146 5 30 1910 0.06 115 28 1780 0.08 142 200 12730 0.10 1273 6 32 1700 0.08 136 30 1590 0.08 127 200 10610 0.10 1061 7 34 1550 0.08 124 32 1460 0.10 146 250 11370 0.12 1364 8 36 1430 0.10 143 34 1350 0.10 135 250 9950 0.12 1194 9 40 1410 0.10 141 36 1270 0.12 152 250 8840 0.14 1238 10 40 1270 0.12 152 40 1270 0.15 191 300 9950 0.14 1337 12 44 1170 0.12 140 40 1060 0.15 159 300 7960 0.16 1274 14 44 1000 0.14 140 46 1050 0.18 189 300 6820 0.16 1091 16 48 950 0.14 133 50 990 0.18 178 300 5970 0.16 955 18 48 850 0.18 153 50 880 0.18 158 300 5310 0.16 850 20 50 800 0.20 160 50 800 0.20 160 300 4770 0.18 859 22 50 720 0.20 144 52 750 0.20 150 300 4340 0.18 781 24 50 660 0.22 145 52 690 0.24 166 300 3980 0.18 716 26 50 610 0.22 134 54 660 0.24 158 300 3670 0.20 734

When the user clicks the Set button in the material box 12 on the input screen of the drilling processing condition of the input unit shown in Fig. 3, the cutting information providing unit 20 selects the tool material, the impeller material ) And the hole diameter (Hole Dia.).

The detailed cutting information provided by the cutting information providing unit 20 may be used by the user as a reference. If the cutting condition is determined to be more suitable for machining, the user may directly input the cutting information.

Meanwhile, the first screw hole 124 formed in the body 100 is formed through a center drilling process and a drilling process.

The center drilling process displays the drilling position on the shroud surface 123 that forms the curved surface and also allows the tool to be drilled in the drilling process so that the tool does not slip on the shroud surface 123, .

The drilling process is a process of forming a hole to be threaded inside to form the first threaded hole 124. The hole diameter formed in the center hole formed through the center drilling process, Is formed in the hole.

The methods of controlling the drilling tools of the center drilling and the drilling are similar and therefore will be described in common.

FIG. 4 is a view showing a bottom surface of a shroud surface and a screw hole extracted by a surface extracting unit of a drilling tool control system according to an embodiment of the present invention, and FIG. 5 is a schematic view of a drilling tool control system FIG. 6 is a diagram illustrating a process of calculating the coordinates of a stop point of a body by a CC data operation unit of a drilling tool control system according to an embodiment of the present invention. FIG. Fig.

When the CC data button for center drilling in the body box 13 or the CC data button for drilling is clicked, as shown in FIG. 4, the surface extracting unit 30 extracts the drilling tool from among the surfaces of the shroud surface 123 The entering surface 131 and the bottom surface 132 of the first threaded hole 124 being cut by the drilling tool are extracted.

5, the CC data operation unit 40 calculates the coordinates of the center point 142 of the floor surface 132 and calculates a vertical axis 143 passing through the center point and perpendicular to the floor surface 132 And calculates the intersection 141 between the vertical axis 143 and the surface 131.

The intersection 141 may be a coordinate at which the tip of the drilling tool enters.

The CC data calculating unit 40 calculates the vertical axis 143 from the bottom surface 132 and calculates the intersection 141 between the vertical axis 143 and the surface 131 to determine the position where the drilling tool enters, The drilling tool can be controlled irrespective of the angle formed by the surface 131 of the surface 123 and the hole 124 formed by the drilling tool.

6, the CC data calculating unit 40 calculates the distance between the intersection 141 and the center point 142 along the vertical axis 143 at an interval corresponding to one maximum cutting depth, Can be calculated.

The stop point 144 coordinates may be computed from the intersection 141 toward the center point 142 at an interval corresponding to one maximum cutting depth and from the center point 142 toward the intersection 141 one time at the maximum cutting depth Can be calculated at corresponding intervals.

In the case of machining a hole in the shroud surface 123 of the blade 120 having a shape narrower than the height, the drilling tool can penetrate the side surface of the blade 120 even with a small error occurring during machining, It is necessary to set at least one stop point 144 so that after the drilling tool cuts only to the stop point 144 at the time of one entry, it retreats, then re-enters the next stop point 144, The process of cutting to the center point 144 or the center point 142 is repeated to secure the machining stability and to minimize the occurrence of defective workpieces.

Then, the CL data operation unit 50 calculates the posture vector (i, j, k) of the drilling tool based on the coordinates of the center point 142 and the intersection 141 that are spaced apart from each other.

또는 (X₁-X₂, Y₁- Y₂, Z₁- Z₂)로 연산되거나,

또는

의 단위 벡터로 연산될 수 있다.When the coordinates of the center point 142 are P ₁ (X ₁ , Y ₁ , Z ₁ ) and the coordinates of the intersection 142 are P ₂ (X ₂ , Y ₂ , Z ₂ ) i, j, k)

Operation or by _{(X 1 -X 2, Y 1} - - Y 2, Z 1 Z 2) , or

or

As shown in FIG.

That is, when the user clicks the CC data button in the body box 13 on the input screen of the drilling processing condition of the input unit 10 shown in Fig. 3, the center point 142, the intersection 141, Coordinates and the posture vector (i, j, k) of the drilling tool can be calculated.

The result of the operation can be configured to be displayed to the user.

Thereafter, when the user clicks the Output button for center drilling or the Output button for drilling in the body box 13, the center point 142 calculated by the CC data calculating unit 40 and the CL data calculating unit 50, 141, the coordinates of the stop point 144, and the result of the posture vector of the drilling tool.

The APT source is data provided to the post-processing unit 60, and the post-processing unit 60 can convert it into NC data recognized by the control unit 70 that substantially controls the drilling tool using the APT source. The control unit 70 is a component that controls the machine on which the drilling tool is mounted.

With the above-described configuration, the drilling tool maintains the posture vector calculated by the CL data calculating section 50, and cuts the leading end of the drilling tool in correspondence with the coordinates of the intersection 141 calculated by the CC data calculating section 40 When the tip of the drilling tool reaches the coordinates of the stop point 144, the tool is moved from the stop point 144 where the cutting is stopped while the cutting is stopped, The process of cutting to the step 142 may be repeated to form the hole.

The first threaded hole 124 formed in the shroud surface 123 by the drilling tool can then be threaded inwardly.

Meanwhile, the first pinhole 125 formed in the body 100 may be formed through a center drilling process, a drilling process, and an end milling process. The center drilling process and the drilling process of the first pinhole 125 are similar to the above-described process of forming the first screw hole 124, so the description is omitted.

Unlike the first screw hole 124, the first pin hole 125 can be inserted without a screw. For this purpose, it is necessary to precisely process the diameter of the first pin hole 125. To do this, the end milling process can be added after the drilling process. The end milling for the first pinhole 125 may proceed in a separate operation from the drilling.

Hereinafter, the control of the drilling tool for machining the through hole 224 and the second pin hole 225 formed in the cover 200 will be described.

FIG. 7 is a top view of a cover extracted by a surface extracting unit of a drilling tool control system according to an embodiment of the present invention, and FIG. 8 is a side view of a surface extracting unit of a drilling tool control system according to an embodiment of the present invention. FIG. 9 is a view illustrating a process of calculating the center point coordinates of the first area and the second area of the cover by the CC data operation unit of the drilling tool control system according to the embodiment of the present invention FIG. 10 is a diagram illustrating a process of calculating coordinates of a stop point of a cover by a CC data operation unit of a drilling tool control system according to an embodiment of the present invention. Referring to FIG.

The through hole 224 formed in the cover 200 includes a second screw hole 224a and a receiving groove 224b (see FIG. 11), and the second screw hole 224a is formed by a center drilling process And a drilling process, and the receiving groove 224b may be formed through a counter boring process.

Similar to the process of forming the first screw hole 124 of the body 100, the center drilling process displays the drilling position on the outer surface of the cover 200 forming the curved surface, and at the same time, ) To form a central hole so that drilling can proceed at the correct position without slipping.

The drilling process is a process for forming a hole to be threaded inside to form the second screw hole 224a. The hole diameter formed in the center hole formed through the center drilling process (Hole Dia. Is formed in the hole.

The counter boring process forms a receiving groove 224b that is stepped with the second screw hole 224a so that the head portion of the screw inserted into the second screw hole 224a is embedded in the cover 200 Work.

The methods of controlling the drilling tools of the center drilling and the drilling are similar to each other and therefore they are explained in common.

7 and 8, when the CC data button for center drilling in the cover box 14 and the CC data button for drilling are clicked, 211 and the lower surface 212 are extracted.

The information on the second screw hole 224a is included in the modeling data including the shape information for the cover 200 by the information on the number of holes and the number of blades inputted in the information box 11 described above.

9, the CC data calculating unit 40 calculates the coordinates of the center point 241 of the first area 231 formed on the upper surface 211 of the second screw hole 224a, The coordinates of the center point 242 of the second area 232 formed by the hole 224a on the lower surface 212 can be calculated.

Or the intersection of the extended line of the vertical axis 143 and the upper surface 211 calculated by forming the first screw hole 124 in the body 100 is calculated as the center point 241 of the first area 231, 143 and the lower surface 212 may be calculated as the coordinates of the center point 242 of the second area 232. In this case,

The center point 241 of the first area 231 may be a coordinate at which the tip of the drilling tool enters.

Since the position at which the drilling tool enters through the above-described method is determined, it is possible to control the drilling tool irrespective of the angle formed by the upper surface 211 of the cover 200 and the hole 224a formed by the drilling tool .

10, the CC data calculating unit 40 calculates the maximum value of the depth of cut corresponding to the maximum depth of cut once between the center point 241 of the first area 231 and the center point 242 of the second area 232 It is possible to calculate the stop point 244 coordinates at intervals.

The stop point 244 coordinates may be calculated from the center point 241 of the first area 231 toward the center point 242 of the second area 232 at an interval corresponding to one maximum cutting depth, From the center point 242 of the first area 231 toward the center point 241 of the first area 231 at an interval corresponding to one maximum cutting depth.

In order to prevent the angle of the second screw hole 224a from being formed differently from the design intention due to a small error that may occur during machining and to prevent the tool from being damaged due to chips or the like which are generated during machining, The cutting is performed only up to the stop point 144 at the time of once entry, and then the process of retreating and then re-entering the next stop point 244 or the center point 242 of the second region 232 is repeated to secure the stability of machining This is to minimize the generation of defective products.

The CL data operation unit 50 then calculates the posture vector (i, j, k) of the drilling tool on the basis of the coordinates of the center point 241 of the first area 231 and the coordinates of the center point 242 of the second area 232 .

또는 (X₁-X₂, Y₁- Y₂, Z₁- Z₂)로 연산되거나,

또는

의 단위 벡터로 연산될 수 있다.The coordinates of the center point 242 of the second area 232 are P ₁ (X ₁ , Y ₁ , Z ₁ ) and the coordinates of the center point 241 of the first area 231 are P ₂ (X ₂ , Y ₂ , Z ₂ ), the posture vector (i, j, k) of the drilling tool is

Operation or by _{(X 1 -X 2, Y 1} - - Y 2, Z 1 Z 2) , or

or

As shown in FIG.

3 by clicking the CC data button in the cover box 14 on the drilling processing condition input screen of the input unit 10 shown in Fig. 3, the center point 241 of the first area 231, 232, the coordinates of the stop point 244, and the posture vector of the drilling tool can be calculated. The result of the operation may be displayed to the user.

Thereafter, when the user clicks the Output button for center drilling or the Output button for drilling in the cover box 14, the CC data operation unit 40 and the CL data operation unit 50 An APT source is generated that includes the results of the center point 241, the center point 242 of the second area 232, the coordinates of the stop point 244, and the posture vector of the drilling tool.

The APT source is supplied to the post-processing unit 60 and converted into NC (Numerical Control) data recognized by the control unit 70 that controls the drilling tool.

With the above-described configuration, the drilling tool maintains the posture vector calculated by the CL data calculating section 50, and the leading end of the drilling tool is located at the center point 241 of the first area 231 calculated by the CC data calculating section 40, When the tip of the drilling tool reaches the coordinates of the stop point 244, the cutting is stopped in accordance with the coordinates of the stop point 244 To the center point 242 of the second area 232 by repeating the process of cutting the second screw hole 224a to the next stop point 244 or the center point 242 of the second area 232.

The second threaded hole 224a formed in the cover 200 by the drilling tool may then be threaded inward.

Meanwhile, the second pinhole 225 formed on the cover 200 may be formed through a center drilling process, a drilling process, and an end milling process. The center drilling process, the drilling process and the end milling process of the second pinhole 225 are similar to the process of forming the first screw hole 124 and the second screw hole 224a.

The control of the drilling tool for counterboring will be described below.

11 is a view showing a top surface of a cover extracted by a surface extracting unit of a drilling tool control system and a bottom surface of a receiving groove according to an embodiment of the present invention, FIG. 13 is a view illustrating a process of calculating the surface coordinates of the upper surface by the CC data operation unit of the control system. FIG. 13 is a diagram illustrating a process of calculating the coordinates of the stop point of the receiving groove by the CC data operation unit of the drilling tool control system according to the embodiment of the present invention Fig.

11, when the CC data button for counter boring in the cover box 14 is clicked, the surface extracting unit 30 extracts the CC data from the upper surface 211 of the cover 200, The bottom surface 252 of the receiving groove 224b to be cut by the drilling tool is extracted.

12, the CC data operation unit 40 calculates the coordinates of the center point 262 of the floor surface 252 and calculates the coordinates of the center point 262 of the floor surface 252 along the vertical axis 263 perpendicular to the floor surface 252 And calculates an intersection 261 between the vertical axis 263 and the upper surface 211. [ The intersection 261 may be a coordinate at which the tip of the drilling tool enters.

The CC data calculating unit 40 calculates the vertical axis 263 from the bottom surface 252 and calculates the intersection 261 between the vertical axis 263 and the top surface 211 to determine the position at which the drilling tool enters, It is possible to control the drilling tool irrespective of the angle that the surface 211 makes with the receiving groove 224b formed by the drilling tool.

13, the CC data calculating unit 40 calculates the distance between the intersection 261 and the center point 262 along the vertical axis 263 at an interval corresponding to one maximum cutting depth, Can be calculated.

The stop point 264 coordinates may be computed from the intersection 261 toward the center point 262 at an interval corresponding to one maximum cut depth and from the center point 262 toward the intersection 261 once at the maximum cut depth Can be calculated at corresponding intervals.

The drilling tool is retreated after cutting to the stop point 264 only once, and then re-entered and cut to the next stop point 264 or the center point 262 is repeated to secure the stability of the machining, Can be minimized.

The CL data operation unit 50 then computes the posture vector (i, j, k) of the drilling tool on the basis of the coordinates of the center point 262 and the coordinates of the intersection 261.

또는 (X₁-X₂, Y₁- Y₂, Z₁- Z₂)로 연산되거나,

또는

의 단위 벡터로 연산될 수 있다.When the coordinate of the center point 262 is P ₁ (X ₁ , Y ₁ , Z ₁ ) and the coordinate of the intersection 261 is P ₂ (X ₂ , Y ₂ , Z ₂ ) i, j, k)

Operation or by _{(X 1 -X 2, Y 1} - - Y 2, Z 1 Z 2) , or

or

As shown in FIG.

Thereafter, when the user clicks the Output button for counter boring in the cover box 14, the center point 262, the intersection point 261, and the stop point 264 calculated by the CC data calculation unit 40 and the CL data calculation unit 50 ) And the result of the posture vector of the drilling tool are generated.

The APT source is provided to the post-processing unit 60 and converted into NC data recognized by the control unit 70 that controls the drilling tool.

With the above-described configuration, the drilling tool maintains the posture vector calculated by the CL data calculating unit 50, and cuts the leading end of the drilling tool in correspondence with the coordinates of the intersection 261 calculated by the CC data calculating unit 40 When the tip of the drilling tool reaches the coordinates of the stop point 264, the cutting point is stopped from the stop point 264 where the cutting is stopped while the posture vector is maintained, and the next stop point 264 ) Or the center point 262 may be repeated to form the receiving groove 224b.

The drilling tool control system 1 according to an embodiment of the present invention is used to form the first screw hole 124 (see FIG. 1) on the shroud surface 123 of the blade 120 of the body 100 constituting the closed impeller 1000, The process of forming the first pinhole 125 and the process of forming the through hole 224 and the second pinhole 225 in the cover 200 constituting the closed impeller 1000 have been described.

Hereinafter, a drilling tool control method using a drilling tool control system according to an embodiment of the present invention will be described. 14 is a flowchart showing a drilling tool control method according to an embodiment of the present invention.

14, a drilling tool control method according to an embodiment of the present invention includes steps of inputting drilling processing conditions (S10), providing detailed cutting information (S20), extracting a drilling surface (S30) An operation step S40, a stop point coordinate operation step S50, a tool posture vector operation step S60, a post-processing step S70, and a tool control step S80.

In the drilling processing condition input step S10, the drilling conditions including the position of the holes formed by the drilling, the number of holes, the depth of the holes, the diameter of the hole, the maximum depth of one time, 10).

The drilling processing conditions may further include a rapid moving speed of the drilling tool, a cutting moving speed, an entry margin before machining, an offset distance, a tool material, a work material, and the like.

When the drilling process is performed on the closed impeller 1000 including the body 100 and the cover 200, the number of blades of the body 100, the position of the pin holes, the number of pin holes, the depth of the pin holes, More information can be included.

The input unit 10 can provide an input screen for inputting drilling conditions. The modeling data for the workpiece is displayed on the input screen, and the inputted information is reflected in the modeling data in real time, It is possible to visually express whether or not the machining condition conforms to the user's intention (see FIG. 3).

In the detailed cutting information providing step S20, detailed cutting information optimized based on the drilling processing conditions input in the drilling processing condition input step S10 is provided.

For example, it is possible to provide an optimum cutting speed based on the diameter of the hole, the tool material and the work material.

To this end, the cutting information providing unit 20 associated with the input unit 10 may include a database in which an optimal cutting rate is set according to a tool material, an impeller material, and a drill diameter 1 and Table 2).

In the drilling surface extraction step (S30), the surface extraction unit (30) extracts the drilling start surface and the drilling end surface.

In the case of passing through the workpiece, the surface on which the drilling tool enters can be extracted to the drilling start surface, and the surface through which the drilling tool is drilled can be extracted to the drilling end surface. In the case of forming a hole with a certain depth without penetrating the workpiece, the surface on which the drilling tool enters can be extracted to the drilling start surface, and the bottom surface of the hole can be extracted to the drilling end surface.

For example, when drilling is performed on the closed impeller 1000 including the body 100 and the cover 200, the first screw hole 124 formed in the body 100, The surface 131 of the shroud surface 123 can be extracted to the drilling start surface and the bottom surface 132 of the first screw hole 124 can be extracted to the drilling end point (See FIG. 4). When the cover 200 is passed through the cover 200 as in the case of the second screw hole 224a formed in the cover 200, the upper surface 211 of the cover 200 is extracted to the drilling start surface, The surface 212 can be extracted to the drilling end surface (see FIGS. 7 and 8).

The plane extracting unit 30 extracts a drilling starting plane and a drilling finishing plane based on the position of the holes, the number of holes, the depth of the holes, and the workpiece modeling data among the drilling processing information input to the input unit 10.

In the center point coordinate calculation step S40, the CC data calculation unit 40 calculates the center point coordinates of the hole to be machined based on the drilling start face extracted in the drilling face extraction step S30, the drilling end face, the diameter of the hole, and the like.

For example, when the drilling end surface is substantially perpendicular to the depth direction of the hole, similarly to the case where the first screw hole 124 is formed on the shroud surface 123, the CC data operation unit 40 The center point coordinates of the drilling end surface are calculated first and then the vertical axis perpendicular to the drilling end surface is calculated passing through the center point of the drilling end surface and the intersection point between the vertical axis and the drilling start surface is calculated, (See FIG. 5).

Alternatively, for example, when the drilling end face is not perpendicular to the depth direction of the hole, the CC data operation unit 40, similarly to the case of forming the second screw hole 224 in the cover 200 described above, The modeling data is used to calculate the center point of the drilling start face and the drilling end face respectively on the basis of the drilling start face, the drilling end face, the diameter of the hole, and the like, or the intersection of the vertical axis, The center point of the drilling start surface and the center point of the drilling end surface, respectively.

In the stop point coordinate calculation step (S50), the CC data calculation unit (40) calculates, at intervals corresponding to the maximum maximum cutting depth inputted in the drilling processing condition input step (S10), at least one between the drilling start surface and the center point of the drilling end surface The coordinates of the stop point of

To this end, the CC data operation unit 40 calculates a line segment connecting the center point of the drilling start surface and the center point of the drilling end surface, and calculates at least one stop point coordinate at an interval corresponding to the maximum cutting depth once per the line segment have.

In this case, the CC data calculating unit 40 calculates the stop point coordinates from the center point of the drilling start face to the center point of the drilling end face at an interval corresponding to the maximum cut depth once, or calculates the stop point coordinates from the center point of the drilling end face The stop point coordinates can be calculated at an interval corresponding to the maximum cutting depth once toward the center point.

The calculated stop point coordinates can be a point at which the drilling tool stops the cutting process in the process of cutting the hole, and the drilling tool cuts to the stop point and retracts, then repeats the process of re-entering and cutting to the next stop point . ≪ / RTI >

In the tool attitude vector calculating step (S60), the CL data calculating unit 50 calculates the posture vector of the drilling tool.

The CL data operation unit 50 can calculate the posture vector (i, j, k) of the tool based on the coordinates of the center point of the drilling start surface and the coordinates of the center point of the drilling end surface calculated in the center point coordinate calculation step S40 have.

또는 (X₁-X₂, Y₁- Y₂, Z₁- Z₂)로 연산되거나,

또는

의 단위 벡터로 연산될 수 있다.For example, when the center point coordinate of the drilling end face is P ₁ (X ₁ , Y ₁ , Z ₁ ) and the center point coordinate of the drilling start face is P ₂ (X ₂ , Y ₂ , Z ₂ ) The posture vector (i, j, k) of

Operation or by _{(X 1 -X 2, Y 1} - - Y 2, Z 1 Z 2) , or

or

As shown in FIG.

In the post-processing step S70, the post-processing unit 60 converts the results of the calculation performed by the CC data calculating unit 40 and the CL data calculating unit 50 into NC data recognized by the control unit 70 that controls the drilling tool.

In the tool control step S80, the control unit 70 controls the drilling tool based on the NC data converted in the post-processing step S70, and forms holes corresponding to the holes inputted to the input unit 10 in the workpiece.

In the drilling tool control system and method for controlling a drilling tool according to an embodiment of the present invention, when a user inputs information on the position of a hole, the number of holes, the depth of a hole, and the like, , The center point coordinates of the hole are calculated, and the posture vector of the drilling tool is calculated to control the drilling tool. Therefore, it is easy for unskilled persons to easily drill a hole forming a model having a complicated shape.

The drilling tool control system and the drilling tool control method using the drilling tool control system according to an embodiment of the present invention calculate a vertical axis perpendicular to a floor surface through a center point of a bottom surface of a hole, calculate an intersection point between a vertical axis and a drilling start surface, The intersection point is calculated by the coordinates of the center point of the starting surface of the drilling, so that even if the starting surface of the drilling is formed as a curved surface or the hole is not perpendicular to the starting surface of the drilling,

Further, a stop point is calculated between the drilling start surface and the center point of the drilling end surface, and in the process of cutting the hole, the drilling tool cuts to the stop point and retreats, then re- So that it is possible to prevent the drilling tool from penetrating the side surface of the blade 120 due to a small error occurring at the time of machining the hole in the workpiece having the shape narrower than the height, It is possible to prevent the tool from being damaged due to a chip or the like to be generated.

In addition, if the user inputs basic information such as tool material, workpiece material, and hole diameter, detailed information such as cutting speed can be automatically provided to improve the accessibility of unskilled persons.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

1: Drilling tool control system 100: Body
110: hub 120: blade
123: shroud surface 124: first screw hole
125: first pinhole 131: surface
132, 252: bottom surface 141, 261: intersection
142, 241, 242, 262: center point 143, 263:
144, 244, 264: stop point 200: cover
211: upper surface 212: lower surface
224: Through hole 224a: Second screw hole
224b: receiving groove 225: second pin hole
231: first region 232: second region
1000: Sealed impeller

Claims (10)

An input unit for receiving drilling conditions;
A surface extracting unit for extracting a surface on which the drilling tool enters from the modeling data including the shape information of the workpiece to be drilled and a bottom surface of the hole cut by the drilling tool;
A coordinate data calculator for calculating the coordinates of the center point of the bottom surface and the coordinates of the intersection between the vertical axis passing through the center point and the surface perpendicular to the bottom surface,
And a vector data operation unit for calculating an attitude vector of the drilling tool using the center point coordinate and the intersection coordinates. The method according to claim 1,
Wherein the drilling processing condition includes one maximum cutting depth of the drilling tool and the coordinate data calculating unit calculates at least one stop point coordinate between the center point and the intersection point at an interval corresponding to the one maximum cutting depth Drilling tool control system. 3. The method of claim 2,
And a controller for controlling the drilling tool in accordance with the calculation results of the coordinate data calculator and the vector data calculator. The control unit maintains the posture of the drilling tool corresponding to the posture vector calculated by the vector data calculator , The drilling tool is advanced from the intersection point to the center point to form the hole, the drilling is stopped at the stop point, the drilling tool is retracted, and the drilling tool is moved back to the next stop point or the center point so as to form the hole Drilling tool control system. The method according to claim 1,
Wherein the drilling conditions include a diameter of the hole, a material of the drilling tool, and a material of the workpiece. 5. The method of claim 4,
Further comprising a cutting information providing section for providing detailed cutting information including a cutting speed based on the drilling processing condition. Inputting drilling processing conditions;
Extracting a surface on which the drilling tool enters from the modeling data including shape information of the workpiece to be drilled;
Extracting a bottom surface of a hole cut by the drilling tool from the modeling data;
Calculating a center point coordinate of the bottom surface;
Calculating a vertical axis passing through a center point of the bottom surface and perpendicular to the bottom surface;
Computing the intersection coordinates of the vertical axis and the surface;
And computing an attitude vector of the drilling tool using the center point coordinate and the intersection coordinates. The method according to claim 6,
Wherein the drilling processing conditions include one maximum cutting depth of the drilling tool and computing at least one stop point coordinate between the center point and the intersection at intervals corresponding to the one maximum cutting depth A method of controlling a drilling tool. 8. The method of claim 7,
Maintaining the posture of the drilling tool corresponding to the posture vector, advancing the drilling tool from the intersection point to the stopping point, forming a part of the hole, stopping drilling at the stopping point, And then advancing back to the next stop point or the center point. The method according to claim 6,
Wherein the drilling conditions include a diameter of the hole, a material of the drilling tool, and a material of the workpiece. 10. The method of claim 9,
Further comprising providing detailed cutting information including a cutting speed based on the drilling processing conditions.

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