JPH09309081A - Marking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease a heat influence by a laser beam relating to a workpiece so as to easily high accurately perform marking in the workpiece by the laser beam, by providing a pulse laser generating means intermittently radiating the laser beam from a marking means. SOLUTION: When a marking means 19, simultaneously with starting to move in a marking direction from a start point, operates a laser generating means 50, in order to successively overlap or approach a spot-shaped irradiation mark 51 of a laser beam L in a lengthwise direction of a marking line 52, the marking means 19 intermittently radiates the laser beam L by a time interval in accordance with a moving speed of the marking means 19. By this laser beam L, marking paint applied to a marking location of a workpiece W is successively burned to be sprung, while preventing a thermal influence of the workpiece by the laser beam L, the single marking line 52 is linearly formed in a side surface of the workpiece W.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scoring device for automatically scoring a work such as a cast product or a forged product.

[0002]

2. Description of the Related Art When machining a work such as a cast product or a forged product, it is necessary to measure the dimensions of the work as a pre-work and to draw a scoring line at a required position. This scoring work is usually performed manually by a skilled person, but there is a problem that it requires a high degree of skill, the work is very troublesome, and the work efficiency is significantly reduced.

Therefore, as an alternative scoring technique,
Conventionally, as described in JP-A-53-110200, a laser light generating means is provided, and the laser light generated by this laser light generating means is fed from a laser scoring means to a ruled line of a work through an optical fiber system. An automatic scoring method has been proposed in which a marking portion is irradiated and the scoring paint applied to the surface of the work is discolored to form a scoring line on the work.

[0004]

In this conventional scoring method, laser light is continuously emitted from the scoring means to the surface of the work so that the light is focused on the surface of the work by a condenser lens. There is the following problem because the scoring paint on the surface of the work is discolored by the heat energy to form the scoring lines.

That is, conventionally, since the scoring means irradiates continuous light to the scoring portion of the work, it is necessary to minimize the thermal influence of the laser light on the work. It is necessary to move in the scoring direction with. However, when the moving speed of the scoring means is increased, the head moves and stops repeatedly at high speed during the scoring work, so it is sufficient for the head movement, inertia force at the time of stopping, and the accompanying vibration. In order to withstand the above, the supporting structure on the head side including the scoring means must be made rigid, and there is a disadvantage that the size of the entire apparatus becomes large.

Moreover, even if the strength of the main body of the apparatus can be secured relatively easily, the design of the drive system of the head is naturally limited, and in order to secure the overall strength of the drive system, manufacture of the apparatus is required. There is also a problem in terms of economy, such as a sharp rise in costs. On the other hand, if the thermal energy of the laser light is reduced, the heat influence on the work is reduced, the moving speed of the scoring means can be suppressed, and the head side support structure can be simplified and downsized. However, there is a drawback in that the scoring line on the work becomes unclear due to lack of thermal energy of the laser beam, and the scoring accuracy decreases. In view of such conventional problems, the present invention makes it possible to simplify the entire apparatus, reduce the thermal effect of laser light on a work, and easily draw the work with high accuracy by using the laser light. The purpose is to provide.

[0007]

According to the present invention as set forth in claim 1, the scoring means 19 is moved relative to the work W, and the scoring means 19 emits a laser beam L while the work is being emitted. A scoring device in which a scoring line 52 is inserted in W is provided with pulse laser generating means 50 for intermittently emitting laser light L from scoring means 19.

According to a second aspect of the present invention, in the invention according to the first aspect, an irradiation mark 51 of the laser beam L on the work W is irradiated.
So as to sequentially overlap or approach each other in the longitudinal direction of the scoring line 52, the pulse laser generating means 50 for intermittently emitting the laser light L at a time interval according to the relative moving speed of the scoring means 19 and the work W. Be prepared.

According to a third aspect of the present invention, in the first or second aspect of the invention, the scoring paint P applied to the scoring portion of the work W is burned off by the laser light L from the scoring means 19. It was done like this.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings. In FIGS. 1 to 4, 1 is a substantially square base, and 2 is a swivel base, which is arranged on the base 1. The swivel base 2 is for mounting the workpiece W via the V block 3, and the vertical axis is provided on the base 1 via a support roller or the like.
It is mounted so as to be rotatable around 4 turns, and is driven to rotate around the vertical axis 4 by the swing drive means 5 when the direction of the work W is changed.

Reference numeral 6 denotes a pair of left and right guide frames, which are a pair of front and rear columns 7 standing upright on both left and right sides of the base 1, and a cross beam member connecting the upper ends of the pair of columns 7 in the front and rear direction. 8
And a guide member 9 mounted on the cross beam member 8 to form a gate shape. The left and right lateral beam members 8 are connected to the left and right by a connecting frame 10 on the rear end side.

Reference numeral 11 denotes a front-rear moving frame, which is arranged in the left-right direction straddling the left-right front-rear guide frames 6, and both left and right ends are supported and guided in the front-rear direction by the guide members 9 of the respective front-rear guide frames 6. It is driven in the front-rear direction by the front-rear driving means 12 via a ball screw or the like. 13 is a horizontal movement frame, and a front-back movement frame 11
Is movably supported and guided in the left and right direction, and is driven in the left and right direction by the left and right drive means 14 via a ball screw or the like.

Reference numeral 15 is an elevating guide frame, which is fixed in the vertical direction on the front side of the left and right moving frame 13. 16 is a lifting frame, this lifting frame
16 is vertically supported and guided by a lifting guide frame 15, and is driven in a lifting direction by a lifting driving means 17 via a ball screw or the like.

Reference numeral 18 denotes a head, on which a marking means 19, an image pickup means 20, and a distance measuring means 21 are mounted. The head 18 is capable of swinging about the front-rear axis around the lower end of the elevating frame 16 and the posture changing drive so that the scoring unit 19, the image pickup unit 20, and the distance measuring unit 21 can change their postures between a rightward posture and a downward posture. The means 22 drives forward and reverse within a range of 90 degrees, and is movable in the perspective direction of the work W, and forward and reverse drive by the perspective drive means 23. In addition, each drive means
5,12,14,17,22,23 are composed of motors and the like.

Numerals 24 to 26 are protective plates, which surround the work area on the base 1 from the outside so that the base 1 on the outer side of the front-rear guide frame 6 is surrounded.
It is arranged on both left and right sides, and on the left and right ends on the rear side and the front side. Three protective plates 24 and 25 are provided on both the left and right sides and the rear side, and one protective plate 26 is provided on the front side at both left and right ends.
And, the lower end sides of the three protective plates 24, 25 on the left and right sides and the rear side are detachably locked to the base 1 through a locking structure,
The cross rails 27, 2 whose upper side is fixed to the front and rear guide frame 6 and the connecting frame 10
It is detachably attached to 8 via a magnet. The lower side of the front protective plate 26 is detachably locked to the base 1 through a locking structure, and the upper side of the front protective plate 26 is detachably attached to a bracket 29 protruding forward from the front-rear guide frame 6 through a magnet. There is.

Inside the protective plates 24, 25, 26, there are provided antireflection layers 24a, 25a, 26a coated with black matte paint, etc., and the antireflection layers 24a, 25a, 26a are used for illumination. Light reflection is prevented as much as possible, and when measuring the size of the work W, the work W
And the contrast with the background side is large. The front protection plate 26 has a peephole 26b at the top.
Is provided.

30 is an entrance / exit 31 between the left and right protective plates 24, 25, 26
The blind 30 that opens and closes freely is composed of a synthetic resin flexible net material such as black or the like that is hard to reflect, a sheet material, or the like. The blind 30 is connected at its lower end side to a winding means 32 mounted on the lower side of the base 1 so that it can be freely taken in and out. At times, it is adapted to be wound around the winding means 32. Blinds 30
A locking rod 33 is provided in the left-right direction on the upper end side of the locking rod 33, and the locking rod 33 is detachably locked to a locking member 34 fixed to the upper end side of the left and right protective plates 24, 25, 26. It is supposed to do.

Above the entrance 31 are left and right protective plates 24, 25,
There is no member for connecting the 26, and the blind 30 is configured to be opened when wound on the winding means 32, and the upper side of the work area is also opened.
Therefore, if a crane, winch, etc. traveling in the front-rear direction are provided on the ceiling side above the work area, even if the work W is heavy, the work W can be easily loaded and unloaded on the swivel base 2. It is possible.

Reference numeral 35 is a side illumination lamp, which is a work W on the swivel base 2.
Is attached to a support rod 36 which is erected at the end of the base 1 below the left front guide frame 6 so as to illuminate from the left side. 37 is an upper illumination lamp, and the swivel base 2 is at the moving position of the head 18.
Move the front and rear movement frames so that the upper workpiece W is illuminated from above.
It is attached to the underside of 11. Two side illumination lamps 35 are arranged in the front-rear direction along the left side protection plates 24, 25, 26, and two upper illumination lamps 37 are arranged in the left-right direction along the front-rear moving frame 11.

Reference numeral 38 denotes a corner illumination lamp, which is arranged obliquely downward from each upper corner of the work area toward the work W so that the work W on the swivel base 2 is illuminated from the front, rear, left and right corners. ing. The front corner illumination light 38 is attached to the front end side of the front-rear guide frame 6 via a bracket, and the rear corner illumination light 38 is suspended below the left and right ends of the connecting frame 10 via the bracket. ing.

At the lower end of the elevating frame 16, as shown in FIGS. 5 and 6, a posture changing drive means 22 is mounted via a support plate 39. The posture changing drive means 22 is composed of a motor or the like, and a head support frame 42 is fixed to a rotation shaft (front-back shaft) 40 in the front-rear direction via a hub 41.

The head 18 is, as shown in FIGS.
The head support frame 42 is mounted so as to be orthogonal to the rotation axis 40 and movable in the perspective direction with respect to the work W. That is, the head 18 includes a female screw portion 43 and an L-shaped mounting portion 44 fixed to the female screw portion 43, and the female screw portion 43 is attached to the head support frame.
A screw shaft 45 is slidably supported and guided in a direction orthogonal to the rotary shaft 40 along the screw shaft 42, and a screw shaft 45 is screwed into the female screw portion 43.

The screw shaft 45 is rotatably supported by a pair of bearings 46 fixed to the head support frame 42, and one end of the screw shaft 45 is connected to the motor of the perspective drive means 23. Therefore, the head 18 is movable in the perspective direction with respect to the work W by the forward / reverse operation of the perspective driving means 23.

The image pickup means 20 is for copying the work W and measuring its dimensions, and is constituted by a solid-state image pickup means, for example, a CCD camera 47. Scoring means 19 is work W
The non-contact scoring line is to be inserted into the
It is composed of a laser probe that emits L 2. The distance measuring means 21 is for irradiating the work W with laser light L and measuring the distance between the work W and the scoring means 19.

The CCD camera 47 and the marking means 19 are mounted on the mounting portion 44 of the head 18 at substantially the same position in the front-rear direction. Further, the distance measuring means 21 is mounted on the mounting portion 44 of the head 18 via the bracket 48 on the front side of the scoring means 19.

The distance measuring means 21 uses the laser beam.
L is fixed to the bracket 48 on the workpiece W so as to be close to the laser light L of the scoring means 19 and to prevent both laser lights L from directly interfering with each other.
It is attached to the mounting portion 44 of the so that the angle can be adjusted.
A blocking plate (not shown) is provided between the scoring means 19 and the distance measuring means 21 to prevent the laser light from the scoring means 19 from affecting the distance measuring means 21 side as a disturbance. .

The marking means 19 is a laser type which emits a laser beam L and, as shown in FIG. 7, a pulse laser generating means via a flexible optical fiber cable 49.
Connected to 50. The pulse laser generating means 50 includes a solid-state laser generating section 501 and the solid-state laser generating section 501.
An excitation unit 502 for exciting the excitation unit 502 and a pulse generation unit 503 for generating a drive pulse for driving the excitation unit 502 are provided. The pulse generator 503 can appropriately adjust the pulse rate and the pulse width of the drive pulse in accordance with the moving speed of the marking means 19.

As shown in FIG. 8, the pulse laser generating means 50 causes spot-like irradiation marks 51 of the laser light L applied to the work W to be successively superimposed in the longitudinal direction of the scoring line 52 when the work W is marked. Alternatively, the laser light may be moved at a time interval corresponding to the relative moving speed between the scoring unit 19 and the work W so as to be close to each other.
It is designed to fire L intermittently.

Further, the laser light L of the scoring means 19 is irradiated with the laser light L from the scoring means 19 on the scoring paint P applied to the scoring part of the work W, as shown in FIG. The energy is set to such an extent that the scoring paint P at the irradiation position is burned off by the energy and the scoring paint P on the irradiation mark 51 can be peeled off.

Incidentally, the laser beam L has a spot diameter of 0.
It is set to 1 mm or less, the pulse rate is 50 P / S, the energy is 0.2 J, and the pulse width is about 0.7 msec. And the moving speed at the time of marking is 5 to 30 mm / s
ec. In addition, the scoring paint P to be applied to the work W
Is a bright paint such as white to make the contrast in the image measurement clearer and to ensure the sharpness of the score line 52.
P is used.

At the lower end of the elevating frame 16, obstacle sensors 53 to 55 for detecting obstacles on the left and right sides and at the rear are provided, and an obstacle sensor 56 for detecting an obstacle at the front is provided on the head 18. It is provided. Reference numeral 57 is a sensor that detects the swing position of the head 18, and 58 is a sensor that detects the limit position of the head 18 in the perspective direction. 59 is a control box.

FIG. 10 is a block diagram showing a control system for measurement / scoring. In FIG. 10, reference numeral 60 is a front-rear position detecting means for detecting the position of the front-rear moving frame 11 in the front-rear direction, 61 is a left-right position detecting means for detecting the left-right position of the left-right moving frame 13, and 62 is a raising and lowering direction of the elevating frame 16. Is a lift position detecting means for detecting the position of
It is designed to detect the front, rear, left, right, and upper and lower positions of 18. Each of the detection means 60 to 62 is a linear scale,
It is composed of a pulse encoder and the like.

Reference numeral 63 is an image display means for displaying the image of the work W and other information on the screen. 64 is an image processing means,
The function of displaying the image when the work W is picked up by the CCD camera 47 on the image display means 63, the function of displaying the measurement area on the screen of the image display means 63, the contrast of the light and dark parts in the measurement area are calculated. It has an image processing function of detecting an edge, a function of displaying other necessary information on the image display means 63, and the like.

Reference numeral 65 denotes a dimension calculation means, which is a CCD camera
The work W is copied at 47, and the position of the head 18 when the edge of the work W coincides with a predetermined position on the screen of the image display means 63 is read from each of the position detection means 60 to 62 to calculate the dimension of the work W. ing.

Reference numeral 66 is a setting means, which is a photographing position for photographing the work W by the CCD camera 47 at the time of dimension measurement, and an image display means.
Measurement area on 63 screens, marking means for marking
At 19, the starting point and the ending point at which the marking line 52 is inserted in the work W and other necessary information are set and stored by a keyboard or the like.

An interpolation control means 67 is provided between the starting point and the ending point set by the setting means 66 during the scoring operation.
Is for performing interpolation control so as to move. The interpolation control means 67 has a function of linearly interpolating the head 18 in the front-rear direction, the left-right direction, and the elevating direction, and interpolating the head 18 in the arc direction around the vertical axis 4 of the swivel base 2. It has functions and.

Reference numeral 68 denotes a distance control means which activates the perspective driving means 23 by the output from the distance measuring means 21 when the distance measuring means 21 detects a change in distance during the linear movement of the head 18 by interpolation control. The correction control (feedback control) is performed so that the distance between the scoring unit 19 and the work W is substantially constant.

Reference numeral 69 is a drive control means for controlling the respective drive means 5, 12, 14, 17, 22, 23, and according to the movement / stop command to the measurement position set by the setting means 66, the respective drive means 5, 12, 14,17,22,23
In addition to the normal control function for controlling the drive means, it has a control function for controlling the drive means 5, 12, 14, 17 according to an instruction from the interpolation control means 67. Image display means 63, image processing means
64, the dimension calculation means 65, the setting means 66, the interpolation control means 67, etc. are constituted by a personal computer or the like.

Next, a series of operations from the dimension measurement of the work W to the scoring will be described. First of all, after applying a scoring paint P such as white to a required part of the work W or the whole work, the work W is carried on the swivel base 2 by a crane and the work is placed at a predetermined position on the V block 3. Place W. And
After placing the work W on the V block 3, take-up means
Pull out the blind 30 from 32, and the front left and right protective plates
Pull it up along 24,25,26 to lock the tip 33
The door 31 is completely closed by the blind 30 by locking the right and left to the locks 34 of the left and right protective plates 24, 25, 26.

For example, as shown in FIG. 11, when measuring the length of a cylindrical work W, the CCD camera 47 detects each edge E ₁ and E ₂ of the work W to measure the dimension L ₁ . To do. That is, at the time of measurement, the swivel drive means 5 swivels the swivel base 2 about the vertical axis 4 to orient the axis of the work W in the front-rear direction substantially parallel to the front-rear guide frame 6. Then, the posture changing drive means 22 rotates the head 18 around the rotary shaft 40 by 90 degrees to change the postures of the CCD camera 47 and the like on the head 18 side to the right in the horizontal direction, and then the raising and lowering drive means 17 moves the lifting frame 16.
Is moved up and down along the elevating guide frame 15, and the CCD camera 47 is adjusted to a height substantially the same as the work W.

Next, the front-rear driving means 12 moves the front-rear moving frame 11 in the front-rear direction along the front-rear guide frame 6 so that the CCD camera 47 captures the rear end side of the work W from the side.
Guide the CD camera 47 to the measurement position on the rear end side of the work W. Of course, at this time, if necessary, the left / right driving means 14 moves the left / right moving frame 13 along the front / rear moving frame 11 so that the CC
The distance between the D camera 47 and the work W is adjusted appropriately.

Although the CCD camera 47 is moved by manual control, if the measuring position is set by the setting means 66, the drive control means 69 automatically controls each drive means 5, 12, 1.
It is also possible to operate 4, 17 to automatically move the CCD camera 47.

After the CCD camera 47 reaches the measurement position on the rear end side of the work W, the work W is photographed from the side by the CCD camera 47, and the image is displayed on the screen of the image display means 63 via the image processing means 64. Is displayed. During this imaging, the side illumination light 35 illuminates the work W from the left side, the upper illumination light 37 illuminates the work W from above, and the corner illumination light 38 illuminates the work W from diagonally above. , C
The shadow of the work W can be prevented regardless of whether the work W is photographed by the CD camera 47 from the left side or the upper side.

Protective plates 24, 25, 26 surrounding the work area,
Since the blind 30 is provided with antireflection layers 24a, 25a, 26a, etc., and the work W is coated with the white scoring paint P, the illumination light from each of the lighting lamps 35, 37, 38 is a protective plate. 24, 25, 26
It becomes difficult to reflect the light on the work W and the background part of the work W can be made clearer.
You can shoot with certainty.

An image V ₁ taken at the measurement position on the rear end side of the work W shows an edge of the work W as shown in (I) of FIG.
E ₁ is located on the left side of the screen, and the part of the work W becomes bright and the background part becomes dark. Therefore,
Next, as shown in FIG. 12 (II), the measurement area A is set so as to include the position of the edge E ₁ on the screen, and the position where the contrast of light and dark is large in the measurement area A by the image processing by the image processing means 64. Calculate the position of the edge on the screen
E ₁

When the position of the edge E ₁ in the measurement area A is determined, the front-rear driving means 12 moves the edge forward and backward so that the edge is projected at a specific position on the screen, for example, the central position C, as shown in (III) of FIG. The moving frame 11 is driven to drive the head 18, CC
After moving the D camera 47 backward, front and rear position detecting means
The front-rear movement frame 11 detected by 60, that is, the position of the head 18 in the front-rear direction is read into the dimension calculation means 65 and stored.

Next, the front-rear moving frame 11 is moved forward by the front-rear drive to move the head 18 to the measurement position on the front end side of the work W, and at the measurement position, the front end side of the work W is similarly moved to the CCD. Take a picture with the camera 47. At this time, as shown in (IV) of FIG. 12, an image V _{2 in} which the edge of the work W is located on the right side is displayed on the screen. Therefore, similarly to the above, as shown in (V) of FIG. 12, the measurement area A is set so as to include the edge E ₂ on the screen, and the contrast of light and dark in the measurement area A is set by the image processing by the image processing means 64. A large position is calculated and the position is defined as the edge E ₂ on the screen.

When the position of the edge E ₂ in the measurement area A is determined, the front-rear driving means is adjusted so that the edge E ₂ is aligned with the center position C of the screen as shown in (VI) of FIG.
The front-rear moving frame 11 is driven by 12 to move the head 18 and the CCD camera 47 forward, and then the front-rear position of the head 18 detected by the front-rear position detecting means 60 is read into the dimension calculating means 65 and stored. To do.

In this way, the edges E before and after the work W are
Align _1, E ₂ with the center position C of the screen, and then head 1
When the front and rear positions of 8 are read respectively, the dimension calculation means 65 calculates and stores the difference between the positions of both edges E _{1 and} E ₂ , that is, the dimension L ₁ of the workpiece W in the front and rear direction.

Therefore, after capturing the edges E _{1 and} E ₂ of the work W in the measurement area A, the edges E _{1 and} E ₂ are aligned with the center position C of the screen, and the front and rear positions of the heads 18 at that time are adjusted. By reading and calculating the difference between the two to obtain the dimension L _{1 of the} work W, the dimension measurement is very easy and the measurement accuracy is improved. Therefore, the dimension L _{1 of the} work W can be easily and accurately measured.

When measuring the dimension in the front-rear direction or the dimension in the up-down direction on the opposite side of the work W, the swivel drive means 5 is used to swivel the swivel base 2 around the vertical axis 4 by 180 degrees.
After reversing the left and right sides of, the measurement is performed in the same manner as described above. Then, by rotating the swivel base 2 and reversing the left and right of the work W, it is not necessary to change the posture of the head 18 largely left and right, and at the same time, the left and right moving frame 13 is greatly moved left and right along the front and rear moving frame 11. There is no need to move it. Therefore, the structure of each part can be simplified and the measurement can be performed efficiently.

When the measurement of each dimension of the work W is completed, the laser light L is intermittently emitted from the scoring means 19
The scoring work is performed by inserting the scoring line 52 on the scoring paint P applied on the surface of W, and the scoring work is performed as follows.

That is, at the time of scoring work, a predetermined position of the work W is photographed by the CCD camera 47 and the image display means is displayed.
While referring to the image displayed on the screen of 63, the reference plane of the work W, the starting point P ₁ and the ending point P ₂ of the scoring line 52 are input and set by the setting means 66 in consideration of the measured dimension L ₁ of the work W. To do. Also, if necessary, enter information such as comments and marking numbers for the work W.

Interpolation control means when a command to start scoring is issued
67 is the starting point P ₁ on the actual work W according to the setting conditions
An interpolation control command that linearly connects between the end point P ₂ and the end point P ₂ is output to the drive control means 69. Therefore, each drive means 5, 12, 14, 17 is actuated by the control of the drive control means 69 to change the head 18 to a predetermined posture, and the head 18 is appropriately moved in the front-back, left-right, and up-down directions to form a ruled line. The writing means 19 is moved to the starting point P ₁ .

For example, as shown in FIG. 11, when a scoring line 52 is to be formed on the side surface of the work W parallel to the axial direction of the work W, the head 18 is placed in a horizontal posture and then the scoring means is used.
Align 19 with the starting point P ₁ position. Then, when the scoring means 19 coincides with the starting point P ₁ position, the distance measuring means 21 measures the distance between the work W and the scoring means 19, and the distance control means 68 controls the distance driving means 23 according to the measurement result. By operating it, the head 18 is moved in the perspective direction so that the marking means 19 and the head 18 are at a predetermined distance.

Next, the drive control means 69 controls the drive means 5, 12, 14, 17 in the forward or reverse direction in accordance with the interpolation control command from the interpolation control means 67 to move the head 18 from the starting point P ₁ to the ending point P ₂ At the same time, the laser generation means 50 is activated to intermittently generate the laser light L, and the laser light L is emitted from the scoring means 19 toward the surface of the work W in a substantially vertical direction.
Fire L intermittently.

At this time, in the laser generation means 50, the generation cycle of the drive pulse of the pulse generation part 503 is appropriately set according to the moving speed of the scoring means 19, and this pulse generation part 50
When the excitation section 502 is driven by the drive pulse from 3,
Excitation unit 502 synchronizes with drive pulse and solid-state laser generation unit
Since 501 is excited, laser light corresponding to the moving speed of the scoring means 19 is intermittently generated.

Therefore, if the scoring means 19 starts moving from the starting point P _{1 in the} scoring direction and the laser generating means 50 is activated at the same time, as shown in FIG. In order to sequentially overlap or approach each other in the longitudinal direction of the scoring line 52, the scoring device 19 intermittently emits the laser light L at time intervals according to the moving speed of the scoring device 19. Then, as shown in FIG.
The scoring paint P applied to the scoring portion of W is sequentially burned off, and one scoring line 52 is linearly formed on the side surface of the work W.

In this way, since the laser light L is intermittently emitted from the scoring means 19 to insert the scoring line 52,
Even if the energy of the laser light L is increased and the spot diameter is reduced, the surface of the work W is not damaged by it, and the surface of the work W can be easily and highly heated while preventing the heat effect of the work W by the laser light L. It is possible to draw lines with accuracy. Therefore, it is not necessary to increase the moving speed of the head 18 more than necessary, the supporting structure of the head 18 can be simplified, and the load on each driving means 5, 12, 14, 17 can be reduced, and the manufacturing cost can be reduced. There is.

Further, a spot-shaped irradiation mark 51 of the laser light L
Since the moving speed of the scoring means 19 and the time interval for emitting the laser light L are matched so that the marks sequentially overlap or approach each other in the longitudinal direction of the scoring line 52, the laser light L is emitted intermittently. Despite the scoring, the laser light L can form a scoring line 52 that is continuous or very close to it.

Moreover, since the scoring paint P applied to the surface of the work W by the laser light L is sequentially burned off to perform scoring, the surface of the scoring paint P is discolored by heat and special markings are applied. It is not necessary to use the writing paint P, and it is possible to make sharp markings while using the commercially available very general scoring paint P.

Furthermore, since the scribe-marking paint P is sequentially burnt off with the laser light L to draw the scoring, the laser light L having a large energy and a small spot diameter can be emitted by intermittently emitting the laser light L. That's right, scoring paint P
Compared to the case of marking the surface of the
A very sharp, thin and clear scoring line 52 can be inserted, and scoring work with a good finish is possible.

While the scoring unit 19 moves from the starting point P ₁ to the ending point P ₂ , the head is controlled by the interpolation control by the interpolation control unit 67.
Move 18 and go. However, even during the movement by this interpolation control, the distance measuring means 21 emits the laser light L to the work W side to constantly detect the distance between the scoring means 19 and the work W, as shown in FIG. When the distance between the scoring means 19 and the work W changes due to unevenness on the surface of the work W, the distance control means 68 activates the perspective drive means 23 by immediately detecting the change in the distance. The head 18 is moved in the perspective direction with respect to the work W, and the scoring means 19 and the work W are always kept at a constant distance.

Therefore, it is only necessary to set the starting point P ₁ and the ending point P ₂ of the scoring line 52 by the setting means 66, and it is very easy to set the scoring line before scoring. Writing line
The work W can be marked with 52. After the work W is marked, the work W number is added to save the data, and the entrance 31 is opened to carry the work W on the swivel base 2.

When the work W having the same shape is successively marked, since all the data are already stored with the previous work W as a reference, after placing the work W on the swivel base 2 in the same state. When a measurement start command is issued, the head 18 automatically moves to automatically measure the dimension L _{1 of the} work W, and the scoring number is called to perform scoring automatically.

Although one embodiment of the present invention has been described in detail above, the present invention is not limited to this embodiment. For example, the image pickup means 20 may be any one capable of photographing the work W, and a camera other than the CCD camera 47 can be used. An example of an automatic scoring device that measures the dimensions of the work W and draws the markings as a device to be installed in the work area is shown by illuminating the work W with the illumination lights 35, 37, and 38 to optically measure the dimensions. It may be a dimension measuring device for measurement.

The automatic scoring device may be one for putting scoring lines 52 in the three-dimensional direction on the work W, and may be one for scoring in the one-dimensional direction or the two-dimensional direction. The interpolation control means 67,
It may be incorporated in the drive control means 69, or the function of a personal computer may be used. The pulse laser generating means 50 may be other than the solid-state laser type.

[0068]

According to the present invention as set forth in claim 1, the scoring means 19 is moved relative to the workpiece W, and the laser light L is emitted from the scoring means 19 while the workpiece W is being emitted.
In the scoring device that puts the scoring line 52 into
Since the pulse laser generating means 50 for intermittently emitting the laser light L from the scoring means 19 is provided, the entire apparatus can be simplified and the thermal effect of the laser light L on the work W can be reduced, and the laser light L can be used. The work W can be easily marked with high accuracy.

According to the present invention described in claim 2, in the invention described in claim 1, the irradiation trace 51 of the laser light L on the work W is sequentially superposed or approached in the longitudinal direction of the scoring line 52. Since the laser light L is provided with the pulse laser generation means 50 which intermittently emits the laser light L at a time interval corresponding to the relative moving speed of the scoring means 19 and the work W.
Although the laser beam L is intermittently fired and the scoring is performed, the scoring line 52 which is continuous or very close to the laser beam L can be formed.

According to the present invention as set forth in claim 3, in the invention as set forth in claim 1 or 2, the scoring paint P applied to the scoring part of the work W is applied by the laser light L from the scoring means 19. Since it is burnt off, the scoring paint P
There is no need to use a special scoring paint P as in the case of scoring the surface of the with heat, and it is possible to sharply scribe while using a commercially available very general scoring paint P. Moreover, since the scoring paint P is sequentially burned off with the laser light L to perform scoring, the laser light L having a large energy and a small spot diameter can be emitted by intermittently emitting the laser light L. As compared with the case where the surface of the scoring paint P is discolored by heat, scoring lines 52 that are very sharp, thin and clear can be inserted, and scoring work with a good finished state is possible.

[Brief description of drawings]

FIG. 1 is a perspective view of an entire apparatus showing an embodiment of the present invention.

FIG. 2 is a front cross-sectional view of the entire device showing an embodiment of the present invention.

FIG. 3 is a side sectional view of the entire device showing an embodiment of the present invention.

FIG. 4 is a plan cross-sectional view of the entire device showing an embodiment of the present invention.

FIG. 5 is a side cross-sectional view of the head portion showing the embodiment of the present invention.

FIG. 6 is a plan view of a head portion showing an embodiment of the present invention.

FIG. 7 is an explanatory diagram of a laser beam emitting system showing an embodiment of the present invention.

FIG. 8 is an explanatory diagram of a scribed state according to the embodiment of the present invention.

FIG. 9 is an explanatory diagram of a scribed state according to the embodiment of the present invention.

FIG. 10 is a block diagram of a control system showing an embodiment of the present invention.

FIG. 11 is an explanatory diagram of measurement and scoring work according to the embodiment of the present invention.

FIG. 12 is an explanatory diagram of an edge detection method during measurement according to an embodiment of the present invention.

FIG. 13 is an explanatory diagram of a scoring work according to the embodiment of the present invention.

[Explanation of symbols]

 19 Marking means 50 Pulse laser generating means 51 Irradiation mark 52 Marking line W Work L Laser light P Marking paint

Claims (3)

[Claims] 1. The scoring means (19) is moved relative to the work (W) so that laser light is emitted from the scoring means (19).
In the scoring device in which the scoring line (52) is inserted in the work (W) while firing (L), the pulse laser generating means for intermittently emitting the laser light (L) from the scoring means (19) A scoring device having (50). 2. The irradiation mark (5) of the laser light (L) on the work (W) (5)
The laser light (L) is intermittently arranged at time intervals according to the relative moving speed of the scoring means (19) and the work (W) so that 1) sequentially overlaps or approaches in the longitudinal direction of the scoring line (52). The scoring device according to claim 1, further comprising a pulse laser generating means (50) for selectively emitting the laser. 3. The scoring paint (P) applied to the scoring part of the work (W) is burned off by laser light (L) from the scoring means (19). Or the scoring device described in 2.