KR20170049058A

KR20170049058A - Apparatus for controlling tool turret and method thereof

Info

Publication number: KR20170049058A
Application number: KR1020150149950A
Authority: KR
Inventors: 이보형; 이승한
Original assignee: 현대위아 주식회사
Priority date: 2015-10-28
Filing date: 2015-10-28
Publication date: 2017-05-10

Abstract

The present invention relates to a turret type tool bar control device and method, and more particularly, to a turret type tool bar control device and method which comprises a turret type tool base on which a tool number marking portion is formed, a sensor portion for detecting a mark on a tool number marking portion formed on the turret- And a control unit for instructing the specific tool number of the tool unit to be transferred to the desired coordinates and calculating the actual tool number transferred to the desired coordinates by using the value of the mark detected through the sensor unit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a turret-

More particularly, the present invention relates to a turret-type tool-bar control apparatus and method for precisely transferring a turret-type tool post of a lathe-type tool to a desired position.

In general, NC (Numerical Control) automatic tool changer of a tool for a machine tool is provided with several tools fixed to the tool holder and a part of the tool holder is rotated to position the tool to be machined at the cutting position, Turret) type tool changer and a tool changer which can attach and detach a tool to a spindle spindle by picking up a tool from a tool holder by a separate tool changer .

Generally, as shown in Fig. 1 (a), the turret-type tool post is divided into a certain angle by dividing the outer periphery of the turret head into radial tools, and then the turret head is rotated using a motor (for example, a servo motor) The necessary tools are transferred to the cutting position for machining.

Fig. 1 (b) is a side view of the turret-type tool bar, and the turret head is coupled to a motor (for example, a servo motor).

At this time, in order to transfer the turret head to a desired cutting position, a control device (not shown) receives positional information through an encoder of a motor (e.g., a servo motor).

For example, when the user instructs a desired tool number, the tool (not shown) (for example, NC / PLC) sends the tool band via a motor (for example, a servomotor) to the coordinate value of the corresponding tool number.

At this time, the coordinate of the corresponding tool number is based on the position of the tool holder No. 1, and the coordinates depend on the tool holder number of the tool holder. For example, if the number of tool holders is 12, the first tool holder coordinate is 30 degrees and the 12th is 360 degrees (or 0 degrees).

However, since the position information is fed back through the encoder of a motor (for example, a servo motor) as described above, if the position data is transmitted and the error in the control device (not shown) (That is, when the called tool number differs from the actual tool number mounted on the turret head), there is a problem that normal machining is impossible and a tool breakage or a collision may occur.

The reason for this problem is that the feed position of the tool band (that is, the coordinates of the tool number) is fed back through the encoder of the motor, not the tool band. Therefore, in order to prevent this problem from occurring, the actual position information must be fed back to the tool stage in the final stage.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 10-2000-0015425 (published on Mar. 15, 2000, a rotary tool device of a turret type tool stand).

According to an aspect of the present invention, there is provided a turret-shaped tool rack control apparatus and method, which is created to solve the above-mentioned problems, and which can accurately transfer a turret-type tool rack of a shelf type to a desired position It has its purpose.

A turret type tool rest control apparatus according to one aspect of the present invention includes: a turret type tool base on which a tool number marking portion is formed; A sensor unit for detecting a mark of a tool number marking unit formed on the turret-shaped tool stand; And a controller for controlling the motor to instruct a specific tool number of the turret-type tool base to be transferred to a desired coordinate and calculating an actual tool number transferred to a desired coordinate using the value of the mark detected through the sensor unit .

In the present invention, the tool number marking unit may be integrally formed on one side of the turret-type tool base, or may be formed by a separate means spaced apart from the turret-type tool base by a predetermined distance.

In the present invention, the tool number marking portion is characterized by marking of a specific color, or an actual position corresponding to each tool number in at least one of a magnetic body and a hole.

In the present invention, the sensor unit may include at least one sensor capable of detecting the mark corresponding to the type of the marking to be applied to the tool number marking unit or the marking method.

In the present invention, the tool number marking unit may be formed by forming a plurality of virtual concentric circles whose radii are increased in a predetermined unit with respect to the center of the turret head, and forming a virtual boundary line And the actual tool number is displayed by combining the values set in the respective regions.

In the present invention, the tool number marking portion may be formed by setting a value of a first concentric circle formed at the innermost side of the center of the turret head and an area formed by each of the boundary lines to 1, a second concentric circle The value of the region formed by each of the boundary lines is set to 2, the value of the region formed by the third concentric circle and the respective boundary lines formed on the outer side is set to 4, the fourth concentric circle formed on the outer side of the fourth concentric circle, And the value of the area formed by the second area is set to 8.

According to another aspect of the present invention, there is provided a turret type tool rest control method comprising the steps of: detecting a mark of a tool number marking portion formed on a turret- Controlling a motor to instruct a specific tool number of the turret-shaped tool table to be transferred to a desired coordinate; Calculating an actual tool number transferred to a desired coordinate using the value of the mark detected through the sensor unit; And the control unit transfers the specific tool number of the turret-shaped tool base to the desired coordinates through the motor based on the actual tool number.

In the present invention, the coordinates at which the control unit transfers the tool support using a motor may be,

, Wherein < RTI ID = 0.0 >

Is the command tool number, N is the number of tool holders,

Is the tool number error.

According to an aspect of the present invention, there is provided an apparatus for accurately transferring a turret-type tool rest of a shelf type to a desired position.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exemplary view schematically showing a top and side view of a turret-type tool bar according to an embodiment of the present invention; FIG.
FIG. 2 is an exemplary view showing a schematic configuration of a turret-type tool-bar control apparatus according to an embodiment of the present invention; FIG.
Fig. 3 is an exemplary view showing an embodiment in which a tool number marking portion is formed on a tool post in Fig. 2; Fig.
FIG. 4 is an exemplary diagram showing a tool number marking portion in a form of a table in FIG. 3 to illustrate a method of representing a corresponding tool number according to a marked value.
5 is a flow chart for explaining a turret type tool rest control method according to an embodiment of the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a turret-shaped tool bar control apparatus and method according to the present invention will be described with reference to the accompanying drawings.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

As already mentioned above, in general, a lathe of a machine tool is machined by cutting the tool with a spindle while rotating the spindle, so that when a desired tool number is called in a program, The tool is moved to the cutting position of the workpiece.

At this time, the tool attached to the tool rest is attached in a different shape and length depending on the purpose of the tool and the purpose of the tool. Therefore, if the called tool number differs from the actual tool number, normal machining of the workpiece is impossible and there is a risk of tool breakage or collision.

Accordingly, this embodiment essentially prevents mismatch between the called tool number and the actual tool number, thereby ensuring normal machining and preventing tool breakage or collision.

FIG. 2 is an exemplary view showing a schematic configuration of a turret-type tool-bar control apparatus according to an embodiment of the present invention. FIG. 3 is an explanatory view showing an embodiment in which a tool- .

2, the turret type tool rest control apparatus according to the present embodiment includes a motor 110, an encoder 120, a tool rest 130, a sensor unit 140, a control unit 150, (160).

The motor 110 feeds the tool stand (or the turret head).

That is, the motor 110 (for example, a servo motor) transfers the turret-type tool rest 130 to the cutting position of the workpiece under the control of the controller 150.

The encoder 120 outputs position information according to the rotation of the motor 110.

The control unit 150 detects the rotational position of the motor 110 through the encoder 120.

The tool rest 130 divides the outer circumference of the turret head at a predetermined angle, and a tool is radially arranged. Then, the tool rest 130 is rotated according to the rotation of the motor 110 to transfer a tool required for machining to a cutting position.

A tool number marking unit 131 corresponding to the tool number is formed on one side surface (e.g., an upper surface, a lower surface, or the like) of the tool rest 130 in the present embodiment (see FIG.

The tool number marking unit 131 may be integrally formed with the tool rest 130 or may be formed by a separate means spaced apart from the tool rest 130 by a predetermined distance.

The tool number marking unit 131 may be a marking of a specific color, a magnetic substance (e.g., a magnet), or a hole (hole). That is, the tool number marking unit 131 indicates the actual position for each tool number of the tool rest 130 by the marking (e.g., marking, magnetic body, hole, etc.).

In this case, the mark is described as an example, and therefore, other markings may be applied depending on the embodiment.

The sensor unit 140 detects a mark corresponding to each tool number of the tool number marking unit 131 when the tool rest 130 is transported (or rotated).

The sensor unit 140 applies a sensor capable of detecting the mark according to the type of mark (or marking) to be applied to the tool number marking unit 131.

For example, a photo sensor, a proximity sensor, an infrared sensor, a laser sensor, or the like may be applied according to the mark applied to the tool number marking unit 131.

The control unit 150 may use either the position information detected through the encoder 120 and the position information detected through the sensor unit 140 or the position information detected through the encoder 140, And position information detected through the sensor unit) to detect the position of the tool rest, and controls the motor 110 to transfer the tool rest 130 to the correct position.

The display unit 160 displays the position of the tool rest (that is, the actual tool number transferred or transferred to the cutting position).

FIG. 3 is a view showing an example in which a tool number marking part is formed on the tool rest, as shown in FIG. 2. In this figure, a side face (for example, an upper face, A tool number marking part 131 corresponding to the tool number is formed and a sensor part 140 for detecting the marking part corresponding to the position where the tool number marking part 131 is formed is formed.

For convenience of explanation, it is assumed that markings are formed in the marking scheme in FIG.

That is, in the present embodiment, the mark corresponding to the tool number of each position of the tool rest 130 is formed in the tool number marking unit 131 by marking of the marking method.

For example, a landmark formed by the marking method includes a plurality of concentric circles (virtual concentric circles) whose radii are increased in a predetermined unit with respect to the center of the turret head, and a boundary line (virtual boundary line) The tool number is displayed by combining each area (eg, box) formed when the tool is turned.

That is, the values of the concentric circles (the first concentric circles) and the regions formed by the respective boundary lines are set to 1, the values of the regions formed by the concentric circles (second concentric circle) The value of the area formed by the concentric circles (fourth concentric circle) on the outer side and the value of the area formed by the respective boundary lines are set to 8 After setting, the values of the respective regions are combined and marked so as to be a value indicating the corresponding tool number (see FIG. 4).

FIG. 4 is an example of a table in which a tool number marking unit is shown in FIG. 3 to describe a tool number according to a marked value.

4, an area formed by the innermost concentric circles (first concentric circle) and the respective boundary lines is S1, an area formed by the concentric circles (second concentric circles) on the outer side and the respective boundary lines are S2, The region formed by the concentric circles (third concentric circles) and the respective boundary lines on the next outer side is S3, and the region formed by the concentric circles (fourth concentric circle) on the outer side and the boundary lines after the next is S4.

In each region, '0' means an unmarked region and '1' means a marked region.

Therefore, the value obtained by summing up the values of the areas marked with '1' is the corresponding tool number.

FIG. 5 is a flowchart for explaining a turret type tool bar control method according to an embodiment of the present invention.

As shown in FIG. 5, when a tool number command is input (S101), the controller 150 unclamps the tool pad (S102).

Then, the controller 150 transmits the tool-to-tool coordinates to the motor 110 (S103).

At this time,

Lt; / RTI > here,

N is the number of tool holders,

The tool number error and the resolution are 0.01 degrees.

The control unit 150 controls the motor 110 based on the calculated transfer coordinates to transfer the tool rest 130 to a desired position (S104).

When the transfer of the tool is completed as described above (S105), the controller 150 checks whether the command number (i.e., the command tool number) is the same as the actual number (i.e., the actual tool number) (S106).

Here, the actual number (i.e., the actual tool number) is a tool number that detects the landmark value of the tool number marking unit 131 through the sensor unit 140.

If the command number (that is, the command tool number) and the actual number (i.e., the actual tool number) are the same (YES in S106), the tool unit 130 is correctly transferred. Clamps the tool rest (S107).

However, if the command number (i.e., command tool number) and the actual number (i.e., the actual tool number) are different from each other (NO in S106) as a result of the check (S106)

(S108).

At this time, the tool number error is

Lt; / RTI >

here

Is the tool number error,

The reference tool number,

Is the actual tool number.

Then, the control unit 150 calculates new transfer coordinates by reflecting the tool number error (S103), and then the control unit 150 controls the motor 110 according to the newly calculated transfer coordinates, 130) to a desired position and repeats the process of checking whether the command number (that is, the command tool number) and the actual number (that is, the actual tool number) are the same (S104 to S106).

Accordingly, the present embodiment has an effect of accurately transferring the turret-type tool rest of the shelf type to a desired position.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, I will understand the point. Accordingly, the technical scope of the present invention should be defined by the following claims.

110: motor 120: encoder
130: Tool stand 131: Tool number marking part
140: sensor unit 150: control unit
160:

Claims

A turret-type tool base on which a tool number marking portion is formed;
A sensor unit for detecting a mark of a tool number marking unit formed on the turret-shaped tool stand; And
And a control unit for controlling the motor to instruct a specific tool number of the turret-shaped tool base to be transferred to a desired coordinate and calculating an actual tool number transferred to a desired coordinate using the value of the mark detected through the sensor unit Characterized in that the turret-shaped tool-

The apparatus according to claim 1,
Wherein the turret-type tool rest is integrally formed on one side of the turret-type tool rest or is formed by a separate means spaced apart from the turret-type tool rest by a predetermined distance.

The apparatus according to claim 1,
Wherein the marking means indicates an actual position corresponding to each tool number in at least one of a marking of a specific color, a magnetic body, and a hole.

The apparatus according to claim 1,
Wherein at least one sensor capable of detecting the mark corresponding to the type of the mark or the mark formation to be applied to the tool number marking unit is included.

The apparatus according to claim 1,
A plurality of imaginary concentric circles whose radii are increased in a predetermined unit with respect to the center of the turret head are formed and the values set in the respective regions formed when a virtual boundary line dividing each tool number at the center are drawn are combined, And the number of the turret-type tool-bar control unit is displayed.

6. The apparatus of claim 5,
The values of the first concentric circle formed at the innermost side of the turret head and the area formed by each of the boundary lines are set to 1 and the values of the area formed by the second concentric circle and the boundary line formed outside are set to 2 The value of the area formed by the third concentric circle and each of the boundary lines formed on the outer side is set to 4 and the value of the area formed by the fourth concentric circle and the boundary line formed on the outer side is set to 8 Wherein the turret type tool-to-body control apparatus comprises:

Detecting a mark of a tool number marking portion formed on a turret-shaped tool bar via a sensor portion;
Controlling a motor to instruct a specific tool number of the turret-shaped tool table to be transferred to a desired coordinate;
Calculating an actual tool number transferred to a desired coordinate using the value of the mark detected through the sensor unit;
And the control unit transfers the specific tool number of the turret-shaped tool base to the desired coordinates via the motor based on the actual tool number.

8. The apparatus according to claim 7,
Wherein the turret-shaped tool rest is integrally formed on one side of the turret-shaped tool rest or is formed by a separate means spaced apart from the turret-shaped tool rest by a predetermined distance.

8. The apparatus according to claim 7,
A marking of a specific color, or an actual position corresponding to each tool number in at least one of a magnetic body and a hole.

8. The apparatus according to claim 7,
A plurality of imaginary concentric circles whose radii are increased in a predetermined unit with respect to the center of the turret head are formed and the values set in the respective regions formed when a virtual boundary line dividing each tool number at the center are drawn are combined, The number of the turret-type tool rests is displayed.

The apparatus according to claim 10,
The values of the first concentric circle formed at the innermost side of the turret head and the area formed by each of the boundary lines are set to 1 and the values of the area formed by the second concentric circle and the boundary line formed outside are set to 2 The value of the area formed by the third concentric circle and each of the boundary lines formed on the outer side is set to 4 and the value of the area formed by the fourth concentric circle and the boundary line formed on the outer side is set to 8 Wherein the turret type tool rest control method comprises:

8. The method of claim 7,
Wherein the coordinates by which the control section transfers the tool bush using a motor,

Of the turret type tool rest.
here,

Is the command tool number, N is the number of tool holders,

Is the tool number error.