KR20140071531A - Method for measuring bar-like workpieces size of laser machining apparatus for machining bar-like workpieces - Google Patents

Abstract

The present invention provides a method of measuring dimensions of a bar-shaped workpiece by a laser machining apparatus for machining the bar-shaped workpiece, which is capable of simply measuring the length, width, and outer diameter of a pipe having a rectangular/square cross-section or a circular cross-section by installing a distance sensing means on a machining head. A method of measuring the dimensions of a bar-shaped workpiece by a laser machining apparatus for machining the bar-shaped workpiece includes the steps of storing a reference distance from the clamping center to an arbitrary position of the machining head in a data storage means, wherein the clamping center is spaced apart from the machining head; controlling a position movement of the machining head such that a distance sensing means is aligned with the axis of the clamping center, wherein the distance sensing means is installed on an outer surface of the machining head to be spaced apart from an outer surface of the bar-shaped workpiece and senses a spaced distance; and calculating the distance from the clamping center to the outer surface of the bar-shaped workpiece based on the reference distance stored in the data storage means and the spaced distance sensed by the distance sensing means, wherein the laser machining apparatus used in the method comprises a machine bed having a predetermined length; a chuck means installed on the machine bed to slide on the machine bed to carry a pipe to be machined, which has a predetermined length, in a longitudinal direction of the pipe in a state where the pipe is clamped, and which rotates the clamped bar-shaped workpiece in a clockwise or counterclockwise direction about a clamping center; and a machining head installed to be controlled to move by a predetermined distance in a transverse direction about the axis of the clamping center and which radiates a laser beam toward an outer surface of the bar-shaped workpiece to machine the bar-shaped workpiece carried by the chuck means.

Description

TECHNICAL FIELD [0001] The present invention relates to a bar-type member for laser processing a bar-type member, and more particularly, to a bar-

More particularly, the present invention relates to a method of measuring the pipe outer size of a laser processing machine for processing a bar type member, and more particularly, And a method of measuring the outer size of the bar-shaped member of the bar-type member processing laser.

Generally, a laser processing machine is a device for cutting and processing a laser beam emitted from a laser oscillator by irradiating a condensed laser beam toward a material through a nozzle provided on the processing head. For example, there are a laser processing machine for flat processing and a laser processing machine for bar processing.

The bar type member processed by the latter laser processing machine of the two types of laser processing machines mentioned above refers to a long object (long work piece) which is made of a material having a length much longer than the cross section and which is not substantially flexible. The bar-shaped member may have a cross-section or a closed cross-section that is open in any direction (e.g., "L", "T", "U"), round (including circular / elliptical) / Square cross section.

Generally, a laser processing machine for processing a bar-shaped member, which is generally used, will be described with reference to FIGS. 1 and 2. FIG.

A machine bed 30 having a predetermined length and a processing head supporter 40 disposed adjacent to the front side 31 of the machine bed 30 to feed a laser oscillator A processing head 50 for focusing and irradiating the laser beam transmitted from the machine bed 30 and a laser processing unit 50 provided on the rear side 32 of the machine bed 30 and clamping one end 20a of the bar- (+ X, -X coordinate axes) of the bar-like member 20 (or in the direction of the double-headed arrow A) by rotating the bar-shaped member 20 in the clockwise direction Which is conveyed by the first chuck means (60) on the upper surface of the front side (31) of the machine bed (30) facing the first chuck means (60) And a second chuck means 70 for supporting and passing the other end portion 20b of the member 20. The machining head 50 is passed through the second chuck means 70 and has a predetermined length In order to process the bar type members 20 to be output it is directly adjacent to the second chuck means (70).

The machining head 50 is provided so as to move linearly by a certain distance in the direction of the "-Y" coordinate axis from the "+ Y" coordinate axis in the drawing, and moves linearly in the direction of the "+ Z" Respectively. Here, the "+ X" coordinate axis and the "-X" coordinate axis direction are the directions in which the first chuck means 60 moves in the longitudinal direction of the bar-like member 20.

The machining head 50 moves the laser beam focused through the nozzle 51 to the bar-shaped member 20 (see FIG. 2) while keeping the gap between the end of the nozzle 51 and the outer surface of the bar- The processing head 50 is provided with gap detecting means for detecting a gap between the end of the nozzle 51 and the outer surface of the bar-like member 20 This gap detecting means is a known technique which has been already applied to a flat plate processing apparatus in addition to the bar-shaped member 20.

Axis direction or -Z-axis direction with respect to the bar-like member 20 so that the gap between the nozzle 51 of the machining head 50 and the bar-like member 20 becomes a predetermined value based on the detection result from the gap detecting means. So as to perform material processing.

This is because the focal position of the laser beam varies depending on the distance, and the gap between the nozzle and the bar-shaped member must be kept constant to maintain a constant focal position.

There are various types of such gap detecting means, for example, a capacitive gap sensor for detecting the capacitance between the nozzle of the machining head and the bar-shaped member.

The structure for moving the machining head 50 in the direction of the + Y and / or Z coordinate axes and the + Z / -Z coordinate axis is known in the art, and a detailed description thereof will be omitted .

The first chuck means 60 is installed on the upper surface of the machine bed 30 and is slidably movable in the longitudinal direction (+ X, -X coordinate axis direction) of the machine bed 30 by a driving source such as a motor, (70) or away from the second chuck means (70). The first chuck means 60 is provided with a clamping means 65 including a plurality of jaws 64 for clamping one end of the bar-like member 20, (Not shown) for rotating the clamped bar-shaped member in the forward and reverse directions by rotating the bar-shaped member 64. The first chuck means 60 having such a configuration is a technique commonly known in the laser processing machine for bar-type member processing, and a detailed description thereof will be omitted.

The second chuck means 70 is provided on the upper side of the front side 31 of the machine bed 30 on the opposite side where the first chuck means 60 is located and the bar- (Not shown) for rotating the jaws 74 of the clamping means 75. The clamping means 75 includes a plurality of roller type jaws 74 arranged in a predetermined direction, .

Here, the rotating means of the first chuck means 60 and the rotating means of the second chuck means 70 use separate driving motors, and are controlled and driven in synchronization with each other to rotate the jaws 64, 74 .

On the other hand, the bar-like member 20 clamped by the clamping means of each of the first chuck means and the second chuck means has a clamping center formed by a jaw constituting the clamping means and a bar- The reason for doing this is that if the clamping center and the cross sectional center of the bar-shaped member are not kept in a concentric state in the state where the bar-like member is clamped, the bar- The desired machining precision can not be obtained. Keeping the clamping center and the bar-shaped member cross-section centered is generally well known in the art.

On the other hand, in the above laser processing machine for bar type member, in order to laser process a bar type member such as a pipe having a circular cross section or a pipe having a rectangular cross section as one example of the bar type member 20, The operator manually measures the dimension information by using a measuring tool (Bourneial caliper), and then transmits the measured dimensional information to the NC device ( Control device).

However, the above-described current measurement method has a problem that the productivity is remarkably lowered as an operator performs measurement through manual measurement using a measurement tool.

Further, in order to process a new bar-shaped member having a changed cross-sectional shape and size, the operator has to perform measurement once again. In this case, there is a problem that when the operator inputs incorrectly measured dimension information, it causes processing defects.

In order to solve the above-mentioned problems, there is a tendency to develop a laser processing machine for processing a bar-type member so that measurement information of a bar-like member can be automatically measured by using a sensor device instead of manual measurement.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-described problems, and it is an object of the present invention to provide a method for measuring a length / length and an outer diameter of a pipe having a rectangular / And it is an object of the present invention to provide a method of measuring the outer size of a bar type member of a laser processing machine for processing a bar type member.

To achieve the above object, according to the present invention, there is provided an apparatus comprising: a machine bed having a predetermined length; A barrel-shaped member which is slidably mounted on the machine bed so as to be able to be transported in a longitudinal direction thereof while clamping a pipe to be processed having a predetermined length, and a spinal cord which rotates in a forward and reverse direction about the clamping center A unit; A machining head which is provided so as to be movable in a lateral direction at a predetermined distance with respect to an axis of the clamping center and irradiates a laser beam toward the outer surface of the bar-shaped member for machining the bar- A method for measuring the bar size of a bar-type member of a laser processing machine for bar-type member processing, comprising the steps of: setting a reference distance spaced from the clamping center to an arbitrary position of the machining head; And a distance sensing means provided on an outer surface of the machining head so as to be spaced apart from the outer surface of the bar type member and sensing a distance therebetween, so that the distance sensing means coincides with the axis of the clamping center Controlling movement; And calculating a distance from the clamping center to the outer surface of the bar type member based on the reference distance stored in the data storage unit and the distance sensed by the distance sensing unit.

The following effects can be expected in the laser processing machine for processing according to the present invention. In other words, by providing the machining head with distance sensing means capable of automatically measuring dimension information about the horizontal / vertical length and the outer diameter of a pipe having a rectangular / square cross section and a circular cross section without manually measuring the work, And measurement error of the dimensional information of the pipe does not occur, so that the processing defective phenomenon can be prevented in advance.

1 is an external perspective view showing a configuration of a conventional laser processing machine for bar type member.
2 is an enlarged perspective view showing an enlarged view of the leader line "K"
3 is an external perspective view showing a configuration of a laser processing machine for processing a bar type member according to the present invention.
4 is an enlarged perspective view showing an enlarged view of the leader line "L "
5 is a view showing a method of measuring the outer diameter of the bar-like member in the laser machining apparatus according to the present invention, which is the outer size of the circular-section pipe.
Fig. 6 is a view showing a method of measuring the length of the lateral side of the bar-like member in the laser processing machine according to the present invention, which is the external size of the rectangular cross-section pipe.
7 is a view showing a method for measuring a corner radius of curvature of a rectangular cross section pipe in a bar type member in a laser machining apparatus according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. For the sake of convenience of description, the same reference numerals as those used in the description of the prior art apply to the same constituent members as those of the prior art.

The laser processing machine for processing a bar type member according to the present invention is provided with a machine bed 30 having a predetermined length and a processing head supporter 40 positioned adjacent to the front side 31 of the machine bed 30, A machining head 50 for focusing and irradiating the laser beam transmitted from the laser oscillator (not shown) toward the subsidiary member 20 and a bar type member (not shown) provided on the upper side of the rear side 32 of the machine bed 30 A first chuck means 60 for rotating the bar member in the forward / reverse direction with the one end 20a of the bar member 20 being clamped or for conveying the bar member in the longitudinal direction thereof, A second chuck means (70) for supporting and passing the other end (20b) of the bar-like member conveyed by the first chuck means (60) on the upper surface of the front side (31) of the machine bed , And the machining head 50 is protruded by a predetermined length through the second chuck means 70 In order to process the member 20 it is provided adjacent to the second chuck means (70).

The machining head 50 is provided so as to move linearly by a certain distance in the direction of the "-Y" coordinate axis from the "+ Y" coordinate axis in the drawing, and to move linearly in the direction of the "+ Z" Respectively. Here, the "+ X" coordinate axis and the "-X" coordinate axis direction are the directions in which the first chuck means 60 moves in the longitudinal direction of the bar-like member 20.

The machining head 50 is so constructed that the laser beam is directed to the bar-like member 20 through the nozzle 51 in a state in which the distance between the end of the nozzle 51 and the outer surface of the bar- The bar-shaped member 20 can be cut so that the processing head 50 is equipped with gap detecting means for detecting the gap between the end of the nozzle 51 and the outer surface of the bar- This gap detecting means is a known technique already applied to flat plate machining apparatuses other than bar-shaped members.

Axis direction or -Z-axis direction with respect to the bar-like member 20 so that the gap between the nozzle 51 and the bar-like member 20 of the machining head 50 becomes a predetermined value based on the detection result from the gap detecting means So as to perform material processing.

This is because the focal position of the laser beam varies depending on the distance, and the gap between the nozzle and the bar-shaped member must be kept constant to maintain a constant focal position.

There are various types of such gap detecting means, for example, a capacitive gap sensor for detecting the capacitance between the nozzle of the machining head and the bar-shaped member.

The structure for moving the machining head 50 in the direction of the + Y / -Y coordinate axis and the + Z / -Z coordinate axis is a technique commonly known in this field, and thus a detailed description thereof will be omitted.

The first chuck means 60 is installed on the upper surface of the machine bed 30 and is slidably movable in the longitudinal direction (+ X, -X coordinate axis direction) of the machine bed 30 by a driving source such as a motor, (70) or away from the second chuck means (70). The first chuck means 60 is provided with a clamping means 65 including a plurality of jaws 64 for clamping one end of the bar-like member 20, (Not shown) for rotating the clamped bar-shaped member in the forward and reverse directions by rotating the bar-shaped member 64. The first chuck means 60 having such a configuration is a technique commonly known in the field of a laser processing machine for pipe processing, and a detailed description thereof will be omitted.

The second chuck means 70 is provided on the upper side of the front side 31 of the machine bed 30 on the opposite side where the first chuck means 60 is located and the bar- (Not shown) for rotating the jaws 74 of the clamping means 75. The clamping means 75 includes a plurality of roller type jaws 74 arranged in a predetermined direction, .

Here, the rotating means of the first chuck means 60 and the rotating means of the second chuck means 70 use separate driving motors, and are controlled and driven in synchronization with each other to rotate the jaws 64, 74 .

On the other hand, the bar-like member 20 clamped by the clamping means of each of the first chuck means and the second chuck means has a clamping center formed by jaws constituting the clamping means, The reason for doing this is that the bar-shaped member is rotated in an eccentric state when the pipe is machined unless the cross-sectional center of the clamping center and the bar-shaped member is kept concentric with the bar-shaped member being clamped The desired machining accuracy can not be obtained. Keeping the clamping center and the bar-shaped member cross-section centered is generally well known in the art.

The laser machining apparatus for processing a bar type member according to the present invention has the same structure as that of the prior art. However, the difference from the prior art is that the distance detecting means 100, which is an optical sensor, 50, so that it can be utilized variously based on the information sensed by the distance sensing means 100.

 The bar-shaped member 20 can be measured by measuring the external size of a pipe having a circular / square / rectangular cross section in the bar-like member. The bar-like member 20 to be described below is unified by the term "pipe" The same number as the member number used for the pipe is also given to the pipe.

The machining head 50 is installed so as to be able to control the positional movement of the pipe 20 at a predetermined distance in a direction perpendicular to the longitudinal direction of the pipe 20. The machining head 50 has a straight line extending in the direction of the "+ Y" .

Then, the machining head 50 is controlled to move a certain distance in the direction of the "+ Y" coordinate axis and the "-Y" coordinate axis by a control means (not shown). Here, the "+ Y" coordinate axis and the "-Y" coordinate axis direction are parallel to any one of Y, Z coordinate axes of the sectional center of the pipe 20 to be processed, The machining head 20 moves in parallel with the Y coordinate axis of the Y, Z coordinate axes of the cross-sectional center of the pipe 20 in the direction in which the machining head 50 moves in the transverse direction.

The distance sensing means 100 is installed on the machining head 50 and serves to sense the distance between the machining head 50 and the outer surface of the pipe 20. More specifically, it is detachably attached to the outside of the processing head 50 through a separate connecting means (not shown).

The distance detecting means 100 is an optical sensor which is a non-contact type distance sensor, which uses a laser beam. The distance detecting means 100 includes a sensor housing installed outside the processing head 50, a light emitting portion for generating laser light toward the outer surface of the pipe, And a light receiving unit for receiving the reflected laser light after reaching the outer surface of the pipe 20. The light emitting unit and the light receiving unit are built in the detector housing.

According to the present invention constructed as described above, there is provided a distance sensing means installed on the outer surface of the processing head so as to be spaced apart from the outer surface of the bar type member and sensing a distance therebetween. Based on the distance sensed by the distance sensing means There is a method for measuring information about a bar-like member made up of a plurality of embodiments as follows.

[First Embodiment]

 A measuring step of measuring an outer size of the cross section of the bar type member, a measuring step of measuring an edge radius of curvature, and a step of measuring whether the clamping center and the bar type member are concentric with each other.

[Second Embodiment]

A step of measuring the external size of the cross section and a step of measuring the radius of curvature of the corner are performed according to the type of the bar-shaped member.

[Third Embodiment]

According to another embodiment, the step of measuring the radius of curvature of an edge of the cross section of the cross section and the step of measuring the concentricity between the cross section center of the clamping center and the bar type member are performed according to the type of the bar type member.

[Fourth Embodiment]

According to another embodiment of the present invention, the step of measuring the outer size of the cross section of the bar type member and the step of measuring the concentricity between the clamping center and the cross sectional center of the bar type member are performed.

Hereinafter, each of the measurement steps described in the first, second, third, and fourth embodiments described above will be described in detail.

[Step of measuring the external size of the cross section according to the type of the bar-shaped member]

The present invention relates to a machine bed (30) having a certain length; The bar-shaped member (20) is slidably mounted on the machine bed (30) so that the bar-shaped member (20) having a predetermined length can be transported in the longitudinal direction thereof while being clamped, A spinal cord unit which rotates in the forward and reverse directions about the center of the spinal cord; A machining head (50) provided so as to be movable in a lateral direction at a predetermined distance with respect to an axis of the clamping center, and irradiating a laser beam toward an outer surface of the pipe for machining a bar- A method for measuring the external size of a bar type member of a laser processing machine for processing a bar type member.

The bar-shaped member used in the method of measuring the external size according to the present invention is a circular cross-section pipe, a square cross-section pipe (square cross-section pipe, a rectangular cross-section pipe), which is spaced from the clamping center to any position Setting a reference distance and storing it in a data storage means; Controlling the movement of the machining head so that the distance sensing means 100 coincides with the axis of the clamping center; And calculating a distance from the clamping center to the outer surface of the bar-shaped member based on the reference distance stored in the data storage means and the distance sensed by the distance sensing means (100).

5, the reference distance RD is set at a distance from the clamping center CL to the machining head 50 (see FIG. 5) To the arbitrary position. Here, the arbitrary position of the machining head 50 is preferably set as a point to a light emitting portion and a light receiving portion provided inside the detector housing constituting the distance detecting means 100. However, the present invention is not limited to this, , RD2 can also set the reference distance.

The step of controlling the movement of the machining head so that the distance sensing means 100 coincides with the axis AL of the clamping center CL may be performed by moving the axis of the clamping center CC1 Z coordinate axis or the -Z coordinate axis direction of the Z, Y Cartesian coordinate axis so that the Z coordinate axis of the Z, Y Cartesian coordinate axis coincides with the center axis line AL of the distance sensing means 100, Movement control. Here, the meaning of moving in the + Z coordinate axis or the -Z coordinate axis of the Z, Y orthogonal coordinate axes is the same as the meaning of moving in the lateral direction with respect to the axis of the clamping center.

Next, the step of calculating the distance D from the clamping center CC1 to the outer surface of the bar-shaped member 50 may include calculating a distance D between the reference distance RD stored in the data storing means and the distance D detected by the distance detecting means 100 (1) based on the standoff distance (SOD).

D = RD-SOD - " (1) "

Accordingly, when the bar-shaped member is a circular cross-section pipe, the outer diameter of the circular cross-section pipe is calculated in the calculation step. D calculated in the above-mentioned formula (1) is a value corresponding to the radius, The outer diameter of the circular cross section pipe can be known.

When the bar-shaped member is a rectangular cross-section pipe, the lengths of the lateral sides H and the longitudinal sides P of the square cross-section pipe 20 are calculated in the calculating step as shown in FIG. 6, , The arithmetic operation is performed by first calculating the length of either one of the side (H) and the side (P) of the rectangular cross-section pipe, rotating the rectangular cross-section pipe by 90 ° And calculating the length.

More specifically, the measurement is performed in the same manner as in the method for measuring the outer diameter of the circular cross-section pipe 20, and the horizontal and vertical lengths of the square cross-section pipe are measured twice by rotating the pipe 90 ° .

[Measurement step of radius of curvature of corner]

The present invention relates to a machine bed (30) having a certain length; The bar-shaped member (30) is slidably mounted on the machine bed (30) so that the bar-shaped member (20) having a predetermined length can be transported in the longitudinal direction thereof in a clamped state, A spinal cord unit which rotates in the forward and reverse directions about the center of the spinal cord; A machining head (50) provided so as to be movable in a lateral direction at a predetermined distance with respect to an axis of the clamping center, and irradiating a laser beam toward an outer surface of the pipe for machining a bar- A method for measuring a corner radius of curvature of a bar-shaped member of a laser processing machine for bar-type member processing.

The bar-shaped member used in the method of measuring the external size according to the present invention is a square pipe (square pipe, rectangular pipe), which is positioned at a predetermined distance in the transverse direction with respect to the axis of the clamping center Detecting (measuring) the straight line section distance of each of the side (H) and the side (H) of the square pipe by the distance sensing means while controlling the movement;

Setting the reference lengths of the lateral sides (H) and the longitudinal sides (P) of the square pipe and storing them in the data storage means;

And computing a corner radius of curvature of the square pipe based on the reference distance stored in the data storage means and the linear section distance of each of the horizontal and vertical walls of the square pipe.

Each of the above steps will be described as follows.

6, the machining head 50 is moved in the transverse direction with respect to the axis line AL of the clamping center CL1 (+ Y (Y) on the -Y coordinate axes of the Z, Y orthogonal coordinate axes) The processing head 50 moves parallel to the transverse side H of the rectangular cross-section pipe. At this time, the distance sensing means 100 constitutes a rectangular cross-sectional pipe It is possible to measure the straight line section distance SD of the roadside H excluding the corner portion C1.

That is, if the distance detecting means 100 instantaneously crosses the boundary between the roadside H and the corner portions C1 and C2, the distance detecting means 100 does not measure the distance when passing through the boundary portion .

Since the corner portions C1 and C2 are present on both sides in the width direction of the transverse section H of the rectangular section pipe, when the distance detecting means 100 passes the area of the transverse side H, However, after passing through the boundary region instantaneously, the separation distance is not sensed.

Therefore, since the distance between the first and second points P1 and P2 at which the separation distance is not sensed by the distance sensing means 100 is finally the straight line section distance SD of the side of the rectangular cross section pipe, The straight line section distance SD has a correlation with the machining head position moving distance from the first point P1 to the second point P2 so that the actual machining head position moving distance is calculated and the straight line section distance SD ) Information.

Next, the straight section distance SD of the vertical section P of the rectangular section pipe is measured. The straight section distance SD of the vertical section P is measured by using a chucking means at 90 degrees (degrees) The rectangular cross section pipe is rotated, and then the same method as the above-described method of measuring the straight line section distance of the road side H is performed.

 Up to now, a method of measuring the straight-line distance of a rectangular cross-section pipe has been described.

Next, the method of setting the lateral length of the square pipe and the reference length of the longitudinal side will be described.

The method of setting the transverse side of the square pipe and the reference length of the longitudinal side is the same as measuring the transverse side and the length of the longitudinal side of the rectangular cross section pipe in the description of the external size measuring step of the cross section according to the kind of the above- The description will be omitted.

However, in addition to the above-described embodiment, the method of setting the lateral length of the square pipe and the reference length of the longitudinal side may use the information previously entered by the user in the CAD / CAM.

Finally, based on the reference distance stored in the data storage means and the straight line section distance SD of each side of the side and sides of the rectangular section pie, the corner section C1 of the rectangular section pipe is calculated using the following equation (2) The radius of curvature R is calculated.

R = (H-SD) / 2 (2)

[Step of measuring whether or not the clamping center and the bar-shaped member are concentric with each other]

The present invention relates to a machine bed (30) having a certain length; The bar-shaped member (20) is slidably mounted on the machine bed (30) so that the bar-shaped member (20) having a predetermined length can be transported in the longitudinal direction thereof while being clamped, A spinal cord unit which rotates in the forward and reverse directions about the center of the spinal cord; A machining head (50) provided so as to be movable in a lateral direction at a predetermined distance with respect to an axis of the clamping center, and irradiating a laser beam toward an outer surface of the pipe for machining a bar- A method for measuring the concentricity between a bar-shaped member of a laser processing machine for bar-type member processing and a cross-sectional center of a clamping center.

A distance measuring step of measuring the distance to the specific portion of the outer circumferential surface of the bar type member by the distance sensing means 100; And determining whether the clamping center and the bar-shaped member cross-sectional center are concentric or non-concentric based on whether the separation distance is measured after the step of measuring the separation distance.

The present invention is directed to a circular cross-section pipe and a rectangular cross-section pipe for use in a method for measuring whether or not a center of a bar type member is concentric with a clamping center according to the present invention.

5, when the bar-like member is a circular cross-section pipe, the distance measurement step is performed such that the distance sensing means 100 is aligned with the axis AL of the clamping center CC1, The center of gravity of the clamping center CC1 is determined to be concentric with the center of the pipe CC2 when the separation distance is measured and if the separation distance is not measured, (CC1) and the pipe cross-sectional center (CC2) are not concentric. At this time, the characteristic portion uses the outer peripheral surface of the circular cross section pipe.

If the separation distance is not measured, the clamping center CC1 and the pipe cross-sectional center CC2 are not concentric. If the distance is not concentric, the laser light generated in the light emitting unit constituting the distance sensing means 100 And reaches the outer circumferential surface of the circular cross section pipe and is not reflected by the light receiving section.

When the distance is measured, the clamping center CC1 and the pipe cross-sectional center CC2 are concentric. When the distance is coincident, the laser light generated in the light emitting portion constituting the distance detecting means 100 is transferred to the circular cross- Reaches the outer circumferential surface, is reflected, and is received by the light receiving section.

6, the step of measuring the separation distance may include a step of measuring the distance between the processing head 100 and the clamping center CC1 with respect to the axis AL of the clamping center CC1, (H) and the longitudinal side (P) of the rectangular cross-section pipe while controlling the position movement of the rectangular cross-sectional pipe, wherein the step of determining whether the concentric cross- (SD) of the wall to be measured on the basis of whether or not the distance between any one side of the wall is measured, and then uses the calculated straight line length information. At this time, the characteristic portion uses a boundary portion between one side of a side portion (H) and a side portion (P) of a square cross-section pipe, and the step of determining whether or not the concentricity is equal to or less than half of the calculated straight- And determining whether the center position SD_C and the clamping center position CC1 coincide with each other.

Here, the measurement of the straight section length SD is the same as the above-described method of measuring the corner radius of curvature of the rectangular section pipe.

However, when calculating the actual machining head position shift distance from the first point P1 to the second point P2 for measuring the straight line section distance, the center (SD_C) position of the straight line section distance is calculated, It is determined whether the center (SD_C) position of the clamping center (CC1) and the clamping center (CC1) coincide with each other. That is, it is determined whether it is the shortest distance or the vertical line (on the Z coordinate axis line).

If it is determined that the center (SD_C) position of the straight line section distance does not match the clamping center (CC1) position, then the clamping center (CC1) and the baring member section center (CC2) It is determined whether or not the center (SD_C) position of the straight line segment distance and the clamping center (CC1) position coincide with each other. If they match, the clamping center CC1 and the bar type member sectional center CC2 are concentric with each other.

20: bar type member
30: Machine bed
60: first chuck means
70: second means
100: Distance sensing means
CC1: Clamping center
CC2: Section center
H: Street
P: vertical side
C1:
RD: Reference distance
SOD: separation distance
D: Radius

Claims (4)

A machine bed having a predetermined length; A barrel-shaped member which is slidably mounted on the machine bed so as to be able to be conveyed in a longitudinal direction thereof while clamping a pipe to be processed having a predetermined length, A unit; A machining head which is provided so as to be movable in a lateral direction at a predetermined distance with respect to an axis of the clamping center and irradiates a laser beam toward the outer surface of the bar-shaped member for machining the bar- A bar-shaped member outer shape size measuring method for a bar-type member processing laser processing machine,
Setting a reference distance spaced from the clamping center to any position of the machining head and storing the reference distance in the data storage means;
And a distance sensing means provided on an outer surface of the machining head so as to be spaced apart from the outer surface of the bar type member and sensing a distance therebetween, so that the distance sensing means coincides with the axis of the clamping center Controlling movement;
And calculating a distance from the clamping center to the outer surface of the bar type member based on the reference distance stored in the data storage means and the distance sensed by the distance sensing means. Method of measuring outer size of bar type member. The method according to claim 1,
Wherein the bar-like member is a circular cross-section pipe, and the outer diameter of the circular cross-section pipe is calculated in the calculation step. The method according to claim 1,
Wherein the bar-shaped member is a rectangular cross-section pipe, and the length of the side and sides of the rectangular cross-section pipe is calculated in the calculating step. The method of claim 3,
In the calculating step, after calculating the length of either side of the side of the rectangular section pipe, the rectangular section pipe is rotated 90 ° (degrees) by the chuck means, and then the length of the remaining sides is calculated Wherein the laser beam is irradiated to the bar-shaped member.

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