KR102057460B1 - Measurement system for rotation center axis of processing apparatus - Google Patents

Abstract

In the present invention, introduced is a rotation center axis measurement system of a machining apparatus, which comprises: a table configured to be rotatable; a plurality of lighting units installed to be spaced around a table and irradiating light toward the table; a sensing unit installed on the table to change a position when the table rotates and measuring the amount of the light emitted from the lighting unit; and a control unit provided to operate the table to rotate and receive information from the sensing unit, checking the position measured to be the maximum light amount according as the sensing unit approaches the lighting unit by rotating the table to change the position of the sensing unit, and deriving a center point of the table by collecting the position measured to be the maximum light amount.

Description

MEASUREMENT SYSTEM FOR ROTATION CENTER AXIS OF PROCESSING APPARATUS}

The present invention relates to a system and method for measuring the center of rotation of the processing apparatus for grasping the center of the table of the table using light.

A machine tool processing machine is a machine that uses a variety of cutting or non-cutting methods to process metals or non-metal materials into shapes and dimensions using suitable tools, or to process semi-materials more precisely. Among the machine tools described above, a machine tool in which chips are generated in a machining process is called a cutting machine tool, and a non-cut machine tool in which chips are not generated in a machining process is called a metal machine. The above cutting machine tools include lathes, milling machines, machining centers, drilling machines, boring machines, grinding machines, gear cutters, special processing machines, and the like. The metal forming machines include mechanical presses, hydraulic presses, and cutting machines. Bending machine, forging machine, drawing machine and the like.

Industry Thanks to the overall industry trends, automation and numerical control (NC) in the cutting industry are also rapidly advancing. In recent years, multi-functional machining centers have emerged due to the complex combination of numerical control (NC) of machine tools, which has been divided into rotary lathe series and milling series, and the market has been supported by the wide demand of industrial sites. It is expanding rapidly.

In particular, in a machine tool in which a rotation axis of the C axis exists, it is important to accurately grasp the position of the rotation axis. To this end, conventionally, the position of the rotating shaft was measured using a tool type of contact type. However, in the case of a contact type tool measuring instrument, the operator performing the measurement should install a hardware type measuring instrument called a probe on the spindle and a tool measuring device on the table. Thereafter, by operating a separate measuring cycle to move the main axis and the table, the measuring instrument mounted on the main axis was touched on the tool measuring device installed on the table, the coordinate value was calculated and the rotation center axis was calculated.

However, in the case of the conventional contact type, a tool is installed on the tool, a measuring device is installed on the table, etc., and the touch type does not allow the possibility of damage to the measuring device due to the collision. In addition, since the rotation axis is calculated by one method per set of measuring devices, there is a problem in that it is necessary to rely only on the system of the installed measuring device without a separate checking operation on whether the coordinates of the calculated rotation axis are correct.

The matters described as the background art are only for the purpose of improving the understanding of the background of the present invention, and should not be taken as acknowledging that they correspond to the related art already known to those skilled in the art.

KR 10-2013-0073007 A (2013.07.02)

The present invention has been proposed to solve this problem, by measuring the center point of the table by using the light emitted from the light source, by measuring the center of rotation of the processing device is simplified the process is not necessary because the measuring instrument that was previously installed in the main axis Its purpose is to provide a system and method.

Rotation axis measurement system of the processing apparatus according to the present invention for achieving the above object is a table rotatably configured; An illumination unit configured to be spaced apart from the table and configured to emit light toward the table; A sensing unit installed on the table to change a position when the table is rotated and measuring an amount of light emitted from the lighting unit; And rotating the table, receiving information from the sensing unit, and rotating the table to change the position of the sensing unit, thereby checking a position measured by the maximum light amount as the sensing unit approaches the illumination unit, and measuring the maximum light amount. And a control unit for deriving the center point of the table by collecting the positions.

The lighting unit is composed of a plurality of LEDs, characterized in that to generate a line light source as the plurality of LEDs are arranged in a straight line.

The sensing unit is disposed to be spaced apart from the center of rotation of the table, characterized in that consisting of an illumination sensor to measure the amount of light.

The lighting unit includes a pair of first and second lights, and the first and second lights are arranged to be symmetrical to both sides of the table with respect to the table.

The controller is a coordinate system is preset for the cross section of the table, and stores the coordinates for the position measured by the maximum amount of light through the sensing unit, deriving the center coordinates of the plurality of stored coordinates to derive the center point of the table .

The controller stores the first coordinate point measured at the maximum amount of light as the table rotates and the sensing unit approaches the first light, and the second coordinate point measured at the maximum amount of light as the sensing unit approaches the second light. It is characterized by deriving the center point of the table by deriving the center coordinates between the point and the second coordinate point.

The lighting unit is characterized in that a pair of third and fourth lighting is further configured at a position orthogonal to the imaginary line crossing the first and second lights with respect to the table.

The controller stores a first coordinate point measured by the maximum amount of light as the coordinate system is preset for the cross section of the table, and the table is rotated so that the sensing unit approaches the first to fourth illuminations. A center point of the table may be derived by deriving a point where the first virtual line connecting the second coordinate point and the second virtual line connecting the third coordinate point and the fourth coordinate point are in contact with each other.

The lighting unit may be arranged to be spaced apart at regular intervals along the circumference of the table.

The control unit is preset coordinate system for the cross section of the table, and stores the coordinates for the position measured by the maximum amount of light through the sensing unit, create a virtual polygon by connecting a plurality of stored coordinates by a virtual line, the center of the polygon It is characterized by deriving the coordinates to derive the center point of the table.

On the other hand, the rotation center axis measuring method of the processing apparatus according to the invention is a light irradiation step for irradiating the light unit located on both sides with respect to the table; A sensing step of rotating the table to change a position of the sensing unit provided with the table, and sensing an amount of light emitted from the lighting unit; And a derivation step of checking a position of the light quantity measured by the maximum light quantity through the sensing unit as the table is rotated, and deriving a center point of the table by collecting the position measured by the maximum light quantity.

And a modeling step of setting coordinate data by dividing a cross section of the table with a coordinate system, wherein the deriving step stores coordinates for a position where the amount of light is measured as the maximum amount of light based on the coordinate data, and stores the center of the plurality of stored coordinates. It is characterized by deriving the coordinates to derive the center point of the table.

The system and method for measuring the center of rotation of the processing apparatus having the structure as described above, by identifying the center point of the table by using the light emitted from the light source, the process is simplified because the measuring device that was previously installed on the main axis is unnecessary.

1 is a block diagram of a system for measuring the center of rotation of a machining apparatus according to an embodiment of the present invention.
2 is a view showing a rotation center axis measurement system of the processing apparatus shown in FIG.
3 is a view for explaining a first embodiment of the rotation center axis measurement system of the processing apparatus shown in FIG.
4 is a view for explaining a second embodiment of the rotation center axis measurement system of the processing apparatus shown in FIG.
5 is a view for explaining a third embodiment of the rotation center axis measurement system of the processing apparatus shown in FIG.
6 is a flow chart of the method of measuring the center of rotation of the machining apparatus according to the present invention.

Hereinafter, with reference to the accompanying drawings looks at with respect to the rotation center axis measurement system and method of the processing apparatus according to a preferred embodiment of the present invention.

1 is a block diagram of a system for measuring the center of rotation of the processing apparatus according to an embodiment of the present invention, Figure 2 is a view showing a system for measuring the center of rotation of the processing apparatus shown in Figure 1, Figure 3 is FIG. 4 is a view for explaining a first embodiment of the rotation center axis measurement system of the processing apparatus shown in Figure 4 is a view for explaining a second embodiment of the rotation center axis measurement system of the processing apparatus shown in FIG. 5 is a view for explaining a third embodiment of the rotation center axis measuring system of the processing apparatus shown in FIG. 1, and FIG. 6 is a flowchart of the method for measuring the rotation center axis of the processing apparatus according to the present invention.

Rotation axis measurement system of the processing apparatus according to the present invention, as shown in Figures 1 to 2, a table 10 rotatably configured; An illumination unit 20 configured to be spaced apart from the table 10 and configured to emit light toward the table 10; A sensing unit 30 installed on the table 10 to change a position when the table 10 is rotated and measuring an amount of light emitted from the lighting unit 20; And rotating the table 10 to receive information from the sensing unit 30, and rotating the table 10 to change the position of the sensing unit 30, thereby sensing the lighting unit 20. And a control unit 40 for checking a position measured by the maximum light amount as being close to) and collecting the position measured by the maximum light amount to derive the center point O of the table 10.

According to the present invention, the lighting unit 20 is configured to irradiate light toward the table 10, the sensing unit 30 is provided on the table 10, and the sensing unit 30 changes in position as the table 10 is rotated. The center point O of the table 10 is derived by using the amount of light and the sensing position measured through.

Here, the table 10 may be configured to be rotatable by a motor, the lighting unit 20 not only irradiates light for determining the position of the table 10, but also checks the workpiece seated on the table 10 It also serves to illuminate the light. As shown in FIG. 2, the table 10 and the lighting unit 20 may be installed in a separate machine tool case (C).

In detail, in the present invention, the plurality of lighting units 20 are disposed to be spaced apart from the table 10, and the sensing unit 30 is installed on the table 10 that is configured to be rotatable. Here, the controller 40 rotates the table 10 to change the position of the sensing unit 30, and checks the position where the sensing unit 30 is closest to the lighting unit 20 and has the highest light quantity measured. . In this case, the plurality of lighting units 20 are arranged to be spaced apart from each other, and a plurality of positions measured by the maximum light amount are checked through the sensing unit 30, and the controller 40 derives the center of the positions measured by the maximum light amount. The center point (O) of 10) can be derived.

In this way, by identifying the center point (O) of the table 10 by using the light emitted from the lighting unit 20, the process is simplified as the measuring instrument previously installed on the main axis is unnecessary, and the light of the lighting unit 20 is utilized. By identifying the center point (O) of the table 10 can also check the state of the workpiece seated on the table (10).

In detail with respect to the present invention described above, the lighting unit 20 is composed of a plurality of LEDs, a plurality of LEDs can be arranged in a straight line to generate a line light source.

In the case of LEDs, since light is irradiated with straightness, when a plurality of LEDs are arranged in a straight line, light may be irradiated to a predetermined region of the table 10. Here, the area of the light generated as the LED of the lighting unit 20 irradiates light may be set to the area where the sensing unit 30 passes when the table 10 rotates, and the sensing unit 30 is the lighting unit 20. ), The maximum amount of light measured by the sensing unit 30 may be measured as the maximum amount of light.

In addition, the lighting unit 20 provides light for measuring the center point (O) of the table 10 as the line light source is generated, and then as a light for checking the state of the workpiece seated on the table 10. Also available.

On the other hand, the sensing unit 30 is disposed to be spaced apart from the rotation center of the table 10, it may be made of an illumination sensor to measure the amount of light.

That is, as shown in Figures 2 to 3, the sensing unit 30 is disposed to be spaced apart from the rotation center of the table 10, the position can be changed along the rotation direction of the table 10. Accordingly, the sensing unit 30 may be spaced apart from the outer circumferential surface side of the table 10 so as to be close to the lighting unit 20. The sensing unit 30 may measure an amount of light by sensing light emitted from the lighting unit 20. have.

Hereinafter, various embodiments for deriving the center point O of the table 10 according to the lighting unit 20 of the present invention will be described.

As a first embodiment, as shown in Figure 3, the lighting unit 20 is composed of a pair of first light 21 and the second light 22, the first light 21 and the second light ( 22 may be disposed to be symmetrical to both sides of the table 10 with respect to the table 10.

That is, the lighting unit 20 is composed of the first light 21 and the second light 22 arranged to be stacked on both sides of the table 10 so that the sensing unit 30 installed on the table 10 is formed. The maximum amount of light is measured when approaching one light 21, and the maximum amount of light is measured again when the sensing unit 30 approaches the second light 22, so that the table is measured using the position measured at each maximum amount of light. The center point O of (10) can be grasped. To this end, the first illumination 21 and the second illumination 22 should be set to the same distance and the installation angle spaced apart from the table 10, it is preferable that the emission amount of light is also set the same.

In detail, the control unit 40 has a preset coordinate system for the cross section of the table 10. Such a coordinate system may be derived according to the distance and height between the lighting unit 20 and the table 10, and the structure of the table 10 may be modeled using a cylindrical coordinate system. In this way, for the cross section of the table 10, the point of setting a plurality of coordinates as well as cylindrical coordinates can be used a variety of methods, the detailed description thereof has been omitted.

The controller 40 stores the coordinates of the position measured by the maximum amount of light through the sensing unit 30, and derives the center coordinates O of the table 10 by deriving the center coordinates among the stored plurality of coordinates. have. That is, as the first light 21 and the second light 22 are arranged symmetrically about the table 10, the position measured by the maximum light amount through the sensing unit 30 is derived to two points, and the controller 40 may derive the center of the table 10 by combining the two positions where the maximum amount of light is measured.

That is, as shown in FIG. 3, the controller 40 may include the first coordinate point a measured at the maximum amount of light as the table 10 is rotated and the sensing unit 30 approaches the first light 21. As the sensing unit 30 approaches the second light 22, the sensing unit 30 stores the second coordinate point b measured at the maximum amount of light. In this case, since the coordinate system for the cross section of the table 10 is pre-stored in the controller 40, the controller 40 may receive and store the first coordinate point a and the second coordinate point b. As such, when the first coordinate point (a) and the second coordinate point (b) are stored, a center coordinate between the first coordinate point (a) and the second coordinate point (b) is derived or the first coordinate point (a) The center point O of the table 10 may be derived by summing up the second coordinate point b and halving it.

As such, the lighting unit 20 includes two lights, and the control unit 40 determines the position measured by the maximum amount of light as the table 10 is rotated so that the sensing unit 30 approaches each lighting. The center point O of (10) can be derived.

On the other hand, as shown in FIG. 4, as shown in FIG. 4, the lighting unit 20 is positioned at right angles to a virtual line crossing the first and second lights 21 and 22 around the table 10. A pair of third lights 23 and fourth lights 24 may be further configured.

As such, the lighting unit 20 may be configured of four lights, and each of the lights may be arranged to be spaced apart by 90 ° with respect to the table 10. That is, when the sensing unit 30 approaches the illumination of any one of the first lights 21 to the fourth lights 24 as the table 10 is rotated, the maximum amount of light is measured. The position where the amount of light is measured may be determined, and the center point O of the table 10 may be determined using the measured amount of light.

In detail, the control unit 40 has a preset coordinate system for the cross section of the table 10, and the table 10 is rotated so that the sensing unit 30 is close to the first lighting 21 to the fourth lighting 24. And store the first to fourth coordinate points measured at the maximum amount of light, and connect the first virtual point L1 and the third coordinate point c to each other connecting the first coordinate point a and the second coordinate point b. The center point O of the table 10 may be derived by deriving a point at which the second virtual line L2 connecting the fourth coordinate point d is in contact.

That is, the controller 40 may include the first coordinate points (a) through which the sensing unit 30 is measured at the maximum amount of light as the sensing unit 30 approaches the first illumination 21 to the fourth illumination 24 when the table 10 rotates. The fourth coordinate point d is stored.

The first coordinate point (a), the second coordinate point (b), the third coordinate point (c), the fourth coordinate point (d) is the first lighting (21), the second lighting (22), the third lighting (23) As the fourth lighting 24 is regularly spaced at 90 ° intervals, the fourth lights 24 are spaced at 90 ° intervals from the cross section of the table 10.

Accordingly, the controller 40 may control the first virtual line L1, the third coordinate point c, and the fourth coordinate point d connecting the first coordinate point a and the second coordinate point b. The point where the second virtual line L2 is in contact with each other may be derived, and the point where the first virtual line L1 is in contact with the second virtual line L2 may be derived as the center point O of the table 10. have.

As such, the lighting unit 20 includes four lights, and the control unit 40 determines the position measured by the maximum amount of light as the table 10 is rotated so that the sensing unit 30 approaches each lighting. The center point O of (10) can be derived.

Meanwhile, as shown in FIG. 5, as illustrated in FIG. 5, the lighting units 20 may be arranged to be spaced apart at regular intervals along the circumference of the table 10.

For example, the lighting unit 20 may be configured of three lights, and may be arranged to be spaced apart from each other by 120 ° with respect to the table 10. Of course, the lighting unit 20 may be configured in plural if spaced apart at regular intervals. In this state, as the table 10 is rotated, the maximum light quantity is measured when the sensing unit 30 approaches any one of the plurality of lights, and thus the position where the maximum light amount is measured for the plurality of points is used. The center point O of the table 10 can be grasped.

In detail, the controller 40 stores a coordinate for a position measured by the maximum amount of light through the sensing unit 30, the coordinate system is preset for the cross section of the table 10, and stores a plurality of stored coordinates in a virtual line. By connecting to the virtual polygon to generate, the center coordinates (O) of the table 10 can be derived by deriving the center coordinates of the polygon.

Referring to FIG. 5, when the lighting unit 20 includes the fifth light 25, the sixth light 26, and the seventh light 27, the controller 40 senses the rotation of the table 10. The unit 30 stores the fifth coordinate points e to the seventh coordinate points g, which are measured at the maximum amount of light as they approach the fifth to seventh lights 27 to 27.

The fifth coordinate point (e), the sixth coordinate point (f), and the seventh coordinate point (g) include the fifth light (25), the sixth light (26), and the seventh light (27) at 120 ° intervals. As it is regularly spaced apart, it is spaced apart by 120 ° from the cross section of the table 10.

Here, the controller 40 connects the third virtual line L3 connecting the fifth coordinate point e and the sixth coordinate point f, the sixth coordinate point f, and the seventh coordinate point g. The fifth virtual line L5 connecting the fourth virtual line L4, the seventh coordinate point g, and the fifth coordinate point e may be derived. The third virtual line L3, the fourth virtual line L4, and the fifth virtual line L5 connect each other to form a polygonal figure. In this way, the controller 40 may derive the center of the polygon and determine the center as the center point O of the table 10.

As described above, the lighting unit 20 is configured in plural, through the position change of the sensing unit 30 as the table 10 is rotated, to grasp the position where the maximum amount of light is measured to determine the center point of the table 10 ( By deriving O), the process is simplified as a number of existing measuring instruments are unnecessary.

On the other hand, the method of measuring the center of rotation of the processing apparatus according to the present invention includes a light irradiation step (S20) for irradiating light to the lighting unit 20 located on both sides with respect to the table 10; A sensing step (S30) of rotating the table 10 to change the position of the sensing unit 30 provided with the table 10 and sensing the amount of light emitted from the lighting unit 20; And deriving the center point O of the table 10 by deciding a position measured by the maximum amount of light through the sensing unit 30 as the table 10 is rotated, and collecting the position measured by the maximum amount of light. Step S40; includes.

Here, the modeling step (S10) for setting the coordinate data by dividing the cross section of the table 10 by the coordinate system; the derivation step stores the coordinates for the position where the amount of light measured as the maximum amount of light based on the coordinate data; The center point O of the table 10 may be derived by deriving the center coordinates between the stored plurality of coordinates.

As described above, the section of the table 10 is divided into coordinate systems so that the table 10 is rotated so that the position of the sensing unit 30 is changed so that the position of the sensing unit 30 is changed. Check the position where the quantity of light is measured to be close to 20). In this case, in the case of the lighting unit 20, a plurality of positions measured by the maximum light amount are checked through the sensing unit 30, and the centers of the positions measured by the maximum light amount are derived through the sensing unit 30. (O) can be derived.

In this way, by identifying the center point (O) of the table 10 by using the light emitted from the lighting unit 20, the process is simplified because the measuring device that was previously installed on the main axis is unnecessary, and the light of the lighting unit 20 is utilized. By identifying the center point (O) of the table 10, and also to check the state of the workpiece seated on the table.

While the invention has been shown and described with respect to particular embodiments, it is within the skill of the art that various changes and modifications can be made therein without departing from the spirit of the invention provided by the following claims. It will be self-evident for those of ordinary knowledge.

10: Table 20: lighting unit
30: sensing unit 40: control unit
S10: modeling step S20: light irradiation step
S30: sensing step S40: derivation step

Claims (12)

A rotatable table;
An illumination unit configured to be spaced apart from the table and configured to emit light toward the table;
A sensing unit installed on the table to change a position when the table is rotated and measuring an amount of light emitted from the lighting unit; And
By rotating the table and receiving information from the sensing unit, and rotating the table to change the position of the sensing unit, the position measured by the maximum light amount is checked as the sensing unit approaches the illumination unit, and the position measured by the maximum light amount. The control unit for deriving the center point of the table by collecting the; The method according to claim 1,
The lighting unit is composed of a plurality of LEDs, the rotation center axis measurement system of the processing apparatus, characterized in that for generating a linear light source as a plurality of LEDs are arranged in a straight line. The method according to claim 1,
The sensing unit is disposed so as to be spaced apart from the rotation center of the table, the rotation center axis measuring system of the processing apparatus, characterized in that consisting of an illumination sensor to measure the amount of light. The method according to claim 1,
The lighting unit comprises a pair of first and second lights, and the first and second lights are arranged symmetrically on both sides of the table with respect to the table. The method according to claim 4,
The controller is preset with a coordinate system for the cross section of the table,
A system for measuring the center of rotation of a processing apparatus, comprising: storing coordinates for a position measured by a maximum light amount through a sensing unit, and deriving a center coordinate between a plurality of stored coordinates to derive a center point of a table. The method according to claim 5,
The controller stores the first coordinate point measured at the maximum amount of light as the table rotates and the sensing unit approaches the first light, and the second coordinate point measured at the maximum amount of light as the sensing unit approaches the second light. System for measuring the center of rotation of the processing apparatus, characterized in that to derive the center point of the table by deriving the center coordinates between the point and the second coordinate point. The method according to claim 4,
The lighting unit further comprises a pair of third light and fourth light at a position orthogonal to an imaginary line crossing the first and second lights with respect to the table. The method according to claim 7,
The controller is preset with a coordinate system for the cross section of the table,
The table is rotated so that the sensing unit stores the first to fourth coordinate points measured at the maximum amount of light as the sensing unit approaches the first to fourth lights, and the first virtual line and the third connecting the first and second coordinate points. And a center point of the table by deriving a point where the second virtual line connecting the coordinate point and the fourth coordinate point is in contact with each other. The method according to claim 1,
Illumination portion rotation center axis measurement system of the processing apparatus, characterized in that arranged to be spaced apart at regular intervals along the circumference of the table. The method according to claim 1,
The controller is preset with a coordinate system for the cross section of the table,
It stores the coordinates of the position measured by the maximum amount of light through the sensing unit, generates a virtual polygon by connecting a plurality of stored coordinates by a virtual line, and derives the center point of the table by deriving the center coordinates of the polygon System for measuring the central axis of rotation of a machine. A light irradiation step of irradiating light to lighting units located at both sides of the table;
Sensing step of rotating the table to change the position of the sensing unit provided in the table, and sensing the amount of light emitted from the lighting unit; And
And a derivation step of deriving a center point of the table by checking a position where the amount of light is measured as the maximum amount of light through the sensing unit as the table is rotated, and collecting the position measured by the maximum amount of light. The method according to claim 11,
And a modeling step of setting coordinate data by dividing a section of the table with a coordinate system.
The derivation step stores coordinates for a position where the amount of light is measured as the maximum amount of light based on the coordinate data, and derives a center point between a plurality of stored coordinates to derive the center point of the table. Way.

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