JP6748481B2 - Stamping machine with guide light function and stamping method with stamper with guide light function - Google Patents

Description

The present invention relates to a marking machine provided with a marking stylus and having a guide light function for adjusting a relative distance between a stylus tip and a workpiece marking surface, and a marking method by the marking machine with a guide light function.

In an automated factory such as an automobile or a construction machine, a marking device is used for engraving alphanumeric characters such as a lot number or a matching mark. For example, the following Patent Document 1 discloses a vibrating pen for a marking device, which includes a reciprocating piston and a stylus that follows the reciprocating motion of the piston to stamp the work surface at the tip.

In Patent Document 1, a cylinder, a piston that reciprocates in the cylinder, an elastic member that urges the piston toward the base end, and a reciprocating motion of the piston, follow the reciprocating motion of the piston to stamp the surface of the work. A marking device with a stylus is disclosed.
In order to print on mechanical parts using this marking device, it is necessary to vibrate the piston and stylus using a compressible fluid to engrave at a specified position on the work surface, and move this stylus together with the vibrating pen. Stamping is repeated for each position. By this operation, it is possible to mark characters, numbers, symbols, etc. at necessary positions on the surface to be engraved of the machine part. Further, when the stylus is vibrated at one place, dots are formed in that part. Therefore, by forming a plurality of dots in a predetermined pattern, a so-called two-dimensional code can be formed.

In order to carry out marking with stable quality in this type of marking device, it is important to adjust the distance between the marking surface of the workpiece to be marked and the tip of the stylus. However, since the size and thickness of the work are various and there are variations in the thickness of each part, it is not easy to always control the relative distance between the stamped surface of the work and the tip of the stylus to be within the specified range.

FIG. 4 shows an example of a conventional marking device. The marking device M of this example is supported so as to be movable in the horizontal X-axis direction and the Y-axis direction and movable in the vertical Z-axis direction. The processing head 100 and a stylus 101 mounted on the lower end side of the processing head 100 via a vibration mechanism 100A are provided. After moving the stylus 101 in the X-axis direction or the Y-axis direction to properly adjust the position in the Z-axis direction, an engraving operation is performed in which the tip of the stylus 101 abuts on the marking surface 102 of the workpiece in the Z-axis direction. By repeating this embossing operation, information such as characters and barcodes can be embossed on the marking surface 102 of the work.
FIG. 4 shows, as an example, a state in which the letter A is being drawn on the marking surface 102 of the work by the aggregate of the dots 103 formed by the marking operation.

Therefore, in order to perform stable quality stamping, it is important to adjust the distance e between the tip of the stylus 101 and the marking surface 102 of the workpiece, but it is necessary to visually check whether this distance e is an appropriate distance. Then, there is a problem that is difficult to judge accurately. For this reason, conventionally, it was necessary to perform the trial marking on a plurality of works before starting the stamping on the workpieces, and to perform the official stamping after grasping the upper and lower intervals e at which the trial marking is normally performed. .. There is a problem that the test-marked work is wasted because it becomes an object to be discarded after the test-marking.
From such a background, conventionally, an engraving is provided which includes an image processing camera for imaging a work as shown in Patent Document 2 below, and which adjusts the stylus tip position of the engraving machine based on the image processing information obtained by the image processing camera. Machine is proposed.

JP-A-11-99798 JP, 2000-127590, A

The marking machine described in Patent Document 2 includes a thickness sensor that measures the thickness of the work, and adjusts the vertical position of the lower die that supports the work at the time of marking based on the measurement result of the work thickness, and then the image processing camera. It has a function of correcting the positional deviation of the workpiece in the XY directions and the angular deviation around the Z axis from the image captured by. This marking machine is an apparatus that can realize the prescribed marking by adjusting the vertical position of the marking machine by combining these correction functions and the vertical position information by the image.
However, according to the technique described in Patent Document 2, it takes time to capture an image of a work, analyze the image, measure the thickness of the work, and adjust the vertical position of the work according to the work thickness, and stamp a large number of works. There was a problem when quick processing was difficult. Therefore, it is desired to provide a marking machine capable of quickly positioning the stylus vertically with a simpler process.

Further, in the marking device M shown in FIG. 4, the X-axis direction and the Y-axis direction of the processing head 100 and the X-axis direction and the Y-axis direction of the workpiece marking surface 102 are accurately aligned with the marking surface 102 of the workpiece. If not done, there is a problem that markings such as characters and barcodes cannot be stamped in the correct direction. However, in the conventional marking machine shown in FIG. 4, there is no means for grasping these directions and positions, and there is only means for making a test marking on the work and confirming the direction by the test marking.

The present invention has been made in view of the above circumstances, and it is possible to adjust the interval between the tip of the stylus and the surface to be engraved on the workpiece by a simple operation, and the marking machine with a guide light function that can engrave with stable quality by aligning the direction of the engraving. The purpose is to provide an engraving method.

The present invention has the following features to attain the object mentioned above.
The marking machine with a guide light function of the present invention is movable in the X-axis direction and the Y-axis direction along a direction parallel to the surface of the workpiece marking surface and in the Z-axis direction that is close to and away from the workpiece marking surface. A machining head is freely provided, and a stylus for stamping on the workpiece marking surface is provided at the tip of the machining head, and the machining head is movable in the X-axis direction and the Y-axis direction orthogonal to each other, And a direction in which the stylus axial direction is aligned with the Z-axis direction and the work engraved surface intersects with the Z-axis, the stylus being movably provided in the Z-axis direction orthogonal to the X-axis direction and the Y-axis direction. The stamping machine disposed on the one side of the machining head in the X-axis direction and one side of the Y-axis direction toward the standard engraving position in front of the stylus tip. Two or more light sources, which irradiate the inspection light obliquely at a predetermined inclination angle with respect to the extension axis of the stylus from the side and move together with the processing head, are attached. The inspection light and the inspection light from the other light source are inspection lights that draw a projection pattern of each inspection light on the workpiece marking surface, and the irradiation angle of all the inspection lights with respect to the extension axis line is In addition, the projection pattern irradiated from at least one light source of the one light source and the other light source to the workpiece marking surface has a length parallel to the X axis and a width parallel to the Y axis. The figure having the same is included, and the projection figure irradiated from the other light source to the workpiece marking surface includes the figure having a length parallel to the Y axis and a width parallel to the X axis, and When the workpiece engraved surface is aligned, the plurality of projection figures serve as inspection light which is superposed at the central portion in the lengthwise direction thereof.

When the stylus tip is moved to one side or the other side in the axial direction of the stylus with the inspection light emitted from two or more light sources on the workpiece engraved surface, the projected pattern of the inspection light radiated on the workpiece engraved surface is projected. Move along the engraved surface. Move the stylus tip to one side or the other side along the axial direction, grasp the position of the projected figures of multiple inspection lights, and adjust the position of the stylus tip so that the projected figures overlap. The distance between the stylus tip can be adjusted. Since the adjustment of the stylus tip distance to the work marking surface is completed by stacking multiple projected figures on the work marking surface, the stylus tip distance to the marking surface can be easily adjusted by visually checking the overlap of the projected figures. You can
It is accurate to see the stylus engraving position from directly above the stylus, but since the head and the device itself are directly above the stylus and the engraving position cannot be seen from directly above the stylus, look at it diagonally. It will be. When looking from an angle, it is difficult to accurately grasp the engraving position on the tip side of the stylus. At this point, since the center of the position where the projection figures from two or more light sources overlap is the engraving position, the exact position of the engraving point on the workpiece marking surface can be confirmed, and the engraving position can be accurately positioned. You can
Therefore, it is possible to perform high-quality stamping on the workpiece stamped surface at an accurate position by using the stylus arranged at a desired distance from the workpiece stamped surface. That is, the marking machine of the present invention can accurately form a clear character, a bar code, or the like with good display quality at a target position.

The projected figure projected from one light source on the marking surface has a portion parallel to the X axis and the Y axis, and the projected figure projected from another light source on the marking surface is parallel to the X axis and the Y axis. With such a portion, it is possible to confirm the inclination of the projected figure projected from the one light source and the other light source onto the marking surface. By recognizing the inclination of these projected figures, it is possible to grasp the inclination state and the positional deviation state of the writing information such as characters and barcodes that the stylus should engrave on the surface to be engraved. When the workpiece to be stamped is a machine name plate on the workpiece, etc., and there is a frame at the place to be stamped, the inclination of the workpiece can be corrected according to the state of the projected figure so that it can be stamped at the correct position within the frame. it can.

In the present invention, the inspection light emitted from the one light source and the other light source to the standard engraving position may have the same incident angle with respect to the stylus extension axis.
If the incident angle of the inspection light is the same for one light source and the other light source, when adjusting the distance of the stylus tip to the engraved surface, the projected figure moves an equal distance on the engraved surface according to the movement of the stylus. Therefore, it is easy to adjust the position of the stylus by aligning the projected figures with each other.

In the present invention, a projection pattern of the inspection light projected from the one light source onto the workpiece marking surface is a figure including a − shape along the X axis, and is projected from the other light source onto the workpiece marking surface. The projection figure by the inspection light is a figure including a − shape along the Y axis, and the composite projection figure formed from the plurality of projection figures at the time of alignment includes a − mark in the X axis direction and a − mark in the Y axis direction. It can be configured as a figure.
The stylus tip can be positioned with respect to the surface to be engraved by moving the stylus to align the shapes of the projected figures to form a figure that includes a mark in the X axis direction and a mark in the Y axis direction. In addition, it is possible to grasp a tilt defect of the stylus with respect to the surface to be engraved, a defect in the orientation of the X axis and the Y axis, and the like, based on the tilt state of the minus-shaped projected figure.
Further, when the distance to the work is changed, the balance of the + mark of the synthetic projected figure is lost or the synthetic projected figure becomes L-shaped, but the intersection of the − shaped projected figure and the − shaped projected figure is always the stylus. Indicates the embossing point. Therefore, it is possible to surely grasp the embossing point.
Further, by appropriately selecting the length of the -shape, the range in which the -shape projected figure and the -shape projected figure overlap can be adjusted to the positioning allowable range of the stylus tip with respect to the marking surface.

According to the embossing method of the present invention, it is possible to move in the X-axis direction and the Y-axis direction along the direction parallel to the surface of the workpiece engraved surface and in the Z-axis direction which is close to and separated from the workpiece engraved surface. A head is provided, a stylus for engraving the workpiece marking surface is provided at the tip of the machining head, the machining head is movable in the X-axis direction and the Y-axis direction orthogonal to each other, and The stylus is movably provided in a Z-axis direction orthogonal to the X-axis direction and the Y-axis direction, the axis line direction of the stylus is aligned with the Z-axis direction, and the workpiece engraved surface is arranged in a direction intersecting the Z-axis. A marking machine that is located around the machining head and is located on one side in the X-axis direction and one side in the Y-axis direction from a side of the machining head toward a standard engraving position in front of the tip of the stylus. This is a method of irradiating the inspection light obliquely at a predetermined same inclination angle with respect to the extension axis of the stylus and performing marking using a marking machine equipped with two or more light sources that move together with the processing head. Then, the projection light emitted from the one light source to the workpiece marking surface is irradiated with inspection light including a graphic having a length parallel to the X axis and a width parallel to the Y axis, and is emitted from the other light source. An inspection light including a figure having a length parallel to the Y-axis and a width parallel to the X-axis is irradiated to a projected figure irradiated on the workpiece marking surface, and the workpiece marking surface is set at the standard marking position. When the positions are aligned, the irradiation angles of all the inspection lights are adjusted in the direction in which the plurality of projected figures are overlapped, and the workpiece marking surface is moved along the extension axis direction of the stylus to form the workpiece marking surface. The position where the plurality of projection figures above overlap is adjusted, the position where the plurality of projection figures intersect is grasped as an embossing point, and the projection figures in the overlapping state of the plurality of projection figures with respect to the X-axis and the Y-axis After grasping the inclination and correcting the position of the work so as to eliminate the inclination to complete the positioning of the work with respect to the surface to be engraved, the stylus is used to engrave the surface to be engraved on the work. ..

According to the present invention, the tip of the stylus is moved to one side or the other side along the extension axis direction to grasp the positions of the projected figures of the inspection lights on the marking surface of the work, When the position of the stylus tip is adjusted so that a plurality of projection figures moving on the marking surface overlap according to the change in the distance to the marking surface, the adjustment of the distance between the stylus tip and the marking surface can be completed. Further, the intersection of a plurality of projected figures can be grasped as an engraving position, and if the position of the work is adjusted according to the inclination of the plurality of projected figures to the X-axis and the Y-axis on the work, the tip of the stylus can be adjusted. Since an appropriate value can be set for the distance to the surface to be engraved, the stylus can be accurately positioned with respect to the target position and direction, so that accurate stylus can be performed.

The perspective view which shows an example of the marking machine with a guide light function which concerns on 1st Embodiment of this invention. The perspective view in the case of the marking machine with the same guide light function when the distance between the stylus tip and the workpiece marking surface is shorter than the standard distance. The perspective view in the case of the marking machine with the guide light function when the distance between the stylus tip and the workpiece marking surface is longer than the standard distance. The perspective view which shows an example of the conventional marking machine.

The marking machine with a guide light function according to the first embodiment of the present invention will be described below with reference to the drawings.
1 to 3 show a marking machine with a guide light function according to the first embodiment. A marking machine A according to this embodiment moves a machining head 1 in a horizontal direction by a driving mechanism such as a three-axis stage mechanism (not shown). It is movably supported in the X-axis direction and the Y-axis direction, and is also movably supported in the vertical Z-axis direction. In addition, in this embodiment, the X-axis direction and the Y-axis direction are described as the directions along the horizontal plane, and the Z-axis direction is described as the vertical direction, but the present invention is not limited to these directions, and for example, the Z-axis is the horizontal lateral direction, The X axis or the Y axis may be the vertical direction.
The three-axis stage mechanism is provided with a stage that is movable along each of the X-axis, Y-axis, and Z-axis, and is provided with a support, a support body, an actuator, and the like that support the stage of each of these axes. This is a known drive mechanism. There are various known mechanisms such as a mechanism in which a stage is moved along the screw axis with each axis as a screw axis, and a mechanism in which the stage is moved by a linear actuator attached to each axis. In the present embodiment, the processing head 1 is used. Any structure may be used within a known range as long as it has a structure capable of moving three axes in the X-axis direction, the Y-axis direction, and the Z-axis direction. The stage mechanism that moves the machining head 1 in the directions along the XYZ axes is provided with stages (stands) that support the machining heads on the guide rails provided in the directions along the XYZ axes, and each stage can be moved along the guide rails. A general 3-axis stage mechanism supported by can be widely adopted.

In the configuration of the embodiment shown in FIG. 1, the processing head 1 has a cylindrical drive portion 2 facing downward, and a pin-type stylus 3 is detachably attached to the lower end portion thereof.
The general structure of the drive unit 2 includes a cylinder, a piston reciprocally attached to the cylinder, a stylus attachment portion attached to the tip end side of the piston, and a base end side of the piston. And a vibrating means for vibrating the piston in its longitudinal direction. The stylus 3 is a stylus body connected to the piston, and an engraving made of a hard material such as a cemented carbide, a polycrystalline diamond sintered body, or a cubic boron nitride, which is attached to the tip side of the stylus body and is punched on a workpiece. It consists of a body.
Although the structure of the drive unit 2 will not be described in detail here, a structure that can perform engraving by vibrating the stylus in the axial direction according to the reciprocating movement of the cylinder is applied as an example. As a specific example of the drive unit 2, the structure described in Patent Document 1 can be applied. A reciprocating drive mechanism using air pressure can be used as a mechanism for reciprocating the piston, but a reciprocating drive mechanism of a stylus using electromagnetic force may be applied.

The stylus 3 is attached downward to the center of the lower end (tip) of the cylindrical drive unit 2, and the tip 3a of the stylus 3 is processed into a conical shape. The stylus 3 is removably attached to the drive unit 2, and is configured so that the stylus 3 can be independently replaced when the tip of the stylus 3 is worn.
The dot shape can be stamped on the work by stamping the tip 3a of the stylus 3 on the stamped surface 5 of the work installed below the stylus 3, and the three-axis stage mechanism allows the dot shape to be printed on the stamped surface 7 of the work. Characters and bar codes can be engraved by sequentially changing the engraving position. It is the same as the conventional marking device M described with reference to FIG. 4 in that characters and bar codes can be engraved. As an example, as shown in FIG. 4, an alphabet character is engraved as a group of dots 103 that are engraved. can do.
In the marking machine A shown in FIG. 1, the central axis of the stylus 3 is installed vertically, and the central axis of the stylus 3 coincides with the Z axis. Further, the X axis and the Y axis are defined as axes orthogonal to the Z axis, and the X axis and the Y axis are defined as axes that intersect each other at a right angle in the central portion of the processing head 1 along the horizontal plane.

The processing head 1 is, for example, formed in a rectangular parallelepiped shape, a support shaft 5a extends along the X axis at a right angle to one side surface 1a, and a cylindrical light source 5 is attached to the tip of the support shaft 5a. ing. Further, a support shaft 6a extends along the Y-axis at a right angle to the other side surface 1b of the processing head 1, and a cylindrical light source 6 is attached to the tip of the support shaft 6a. The light source 5 is attached to the support shaft 5a with its lower end surface 5b directed obliquely downward, and the light source 6 is attached to the support shaft 6a with its lower end surface 6b directed obliquely downward.

In FIG. 1, a work is installed below the stylus 3 and the marking surface 7 is installed horizontally. In FIG. 1, the workpiece engraved surface 7 is depicted as a simple planar shape. However, since the workpiece is a three-dimensional shape having various shapes as long as it is a machine part, it is not limited to a flat surface, and a circumferential surface or unevenness may be formed. Although it has a three-dimensional surface, it is drawn in a planar shape in FIG. 1 for simplification of description. For example, if the work is a mechanical part such as a connecting rod or a piston, the surface to be engraved may be a circumferential surface or a curved surface.
FIG. 1 shows a state in which the workpiece engraved surface 7 is arranged below the stylus 3 at an appropriate position, and the detection light 8, 9 is emitted from the light sources 5, 6 to the workpiece engraved surface 7. There is.
The light source 5 of this embodiment has a light emitting source inside, and is provided so that a slitter and a window portion for narrowing and passing the light in an elongated band shape are located below the light emitting source on the end face side arranged obliquely downward. The inspection light 8 in the shape of a slender beam having a cross-sectional shape is obliquely directed downward from the downward end surface of the light source 5. Similarly to the light source 5, the light source 6 also has a light source inside, and is provided with a slitter and a window portion for narrowing and passing the light in an elongated strip shape on the end face side that is arranged obliquely downward, and a cross section from the downward end face. It is configured so that the inspection light 9 in the form of an elongated beam of − type can be emitted obliquely downward.
It should be noted that the light sources 5 and 6 of this embodiment do not necessarily need to have light emitting sources inside, and it is sufficient that the necessary detection lights 8 and 9 can be emitted. Therefore, a light emitting source is provided at another position, for example, a part or the inside of the processing head 1, and a light guide member such as an optical fiber is provided along the support shafts 5a and 6a to guide the detection light, and the detection light 8, The light source 5 and 6 may be configured so that the light source 9 can be emitted in a desired direction.

When the distance (distance) between the tip of the stylus 3 and the workpiece marking surface 7 is set to an appropriate distance (appropriate distance) as shown in FIG. 1, the center optical axis 8a of the detection light 8 emitted from the light source 5 is set. The angle (incident angle) θ formed between the Z axis and the Z axis is, for example, about 45°, and the projection pattern 10 generated by projecting the detection light 8 to the point where the workpiece marking surface 7 and the Z axis intersect. Is along the X-axis-shaped. In the state shown in FIG. 1, the center position in the length direction of the projected figure 10 is aligned with the Z axis.
In the case shown in FIG. 1, the angle (incident angle) θ formed by the optical axis 9a at the center of the detection light 9 emitted from the light source 6 and the Z axis is, for example, about 45°, and the angle is about 45°. A projection figure 11 generated by projecting the detection light 9 to a point where the Z axis intersects is formed in a negative shape along the Y axis. In the state shown in FIG. 1, the center position of the projected figure 11 in the lengthwise direction coincides with the Z axis.
As described above, the light source 5 and the light source 6 are arranged at 90° intervals around the circumference of the processing head 1 so that the negative-shaped detection lights 8 and 9 can be emitted from the light sources 5 and 6 obliquely downward. Has been done.
Further, in the state shown in FIG. 1, the detection light 8 forms on the surface 7 to be engraved, the length of the − type projection figure 10 is about 5 mm to 10 mm, the width of the projection figure 10 is about 0.5 mm to 1.0 mm, It is preferable that the-type projection figure 11 formed by the detection light 9 has a length of about 5 mm to 10 mm, and the projection figure 11 has a width of about 0.5 mm to 1.0 mm. It is desirable that the length of the − type projected figure is approximately the same as the marking range in the Z-axis direction. If the range in which these figures intersect is made equal to the marking range in the Z-axis direction, if the workpiece exists at a position that does not intersect, it can be recognized at a glance that the workpiece is in a position where marking cannot be performed. Considering the cross shape as an easily recognizable dimension, it is preferable to have a length of 5 times or more the width.

It is desirable that the lengths of the projected figures 10 and 11 are associated with the imprintable range of the stylus 3 in the Z-axis direction as described below.
As shown in FIG. 1, when the distance (distance) between the tip of the stylus 3 and the workpiece marking surface 7 is an appropriate distance a, the centers of the projected figures 10 and 11 are the centers of the marking range in the Z-axis direction. Thus, the light sources 5 and 6 are arranged. As an example, if the range in which the stylus 3 can be engraved in the Z-axis direction is set to 5 mm, the length of the projected figure 10 (or the projected figure 11) is 5 mm, and the incident angle θ of the detection lights 8 and 9 is 45°. In the range in which the workpiece engraved surface 7 is moved in the Z axis direction (up and down direction) by ±2.5 mm, the state in which the projected figures 10 and 11 intersect each other is maintained.
That is, when the distance (distance) between the tip of the stylus 3 and the workpiece marking surface 7 is the proper distance a, the − mark by the detection light 8 of the light source 5 and the − mark by the detection light 9 of the light source 6 have different lengths. It intersects in the central part of the direction to form a + sign.
However, when the distance (distance) between the tip of the stylus 3 and the workpiece engraved surface 7 is too close, for example, when the distance (distance) b is as shown in FIG. 2, the detection light 8 draws the − mark. It moves in the direction of the arrow of the axis (forward direction) and deviates from the origin (the intersection of the X axis, the Y axis, and the Z axis on the engraved surface 7), and the detection light 9 draws the-mark, which is the arrow direction of the Y axis (the positive direction). ) Move to the origin. Further, when the distance (distance) between the tip of the stylus 3 and the workpiece engraved surface 7 is too large, for example, when the distance is c as shown in FIG. 3, the detection light 8 draws the − mark, which is the opposite of the X axis. It moves in the arrow direction (negative direction) to move away from the origin, and the-mark drawn by the detection light 9 moves in the direction opposite to the Y-axis (negative direction) to move away from the origin.

In the case shown in FIG. 2, if the projected figures 10 and 11 have a length of 5 mm as described above, the state shown in FIG. 2 shows that the position of the workpiece marking surface 7 in the Z-axis direction is 2.5 mm more than the proper position. Corresponding to a rise above. In the case shown in FIG. 3, if the lengths of the projected figures 10 and 11 are 5 mm as described above, the state shown in FIG. 3 is such that the position of the workpiece marking surface 7 in the Z-axis direction is 2.5 mm from the proper position. Corresponds to the case of falling below.
That is, when the structure shown in FIG. 1 is adopted, the projection figure 10 (-mark) by the detection light 8 and the projection figure by the detection light 9 are within the range in which the workpiece marking surface 7 is moved in the ±2.5 mm Z-axis direction. Since the intersection point where (-mark) intersects always coincides with the Z-axis, if the workpiece marking surface 7 is within ±2.5 mm in the Z-axis direction, it is detected as the projected figure 10 (-mark) by the detection light 8. The intersection of the projected figure 11 (-mark) by the light 9 accurately indicates the engraving position by the stylus 3.
Since the light sources 5 and 6 are arranged at 90° intervals around the circumference of the processing head 1 and the incident angles θ of the detection lights 8 and 9 are the same, the above relationship is established. Therefore, by using the marking machine A of the present embodiment, the marking position on the marking surface 7 can be accurately grasped as the intersection point position of the projected figure 10 and the projected figure 11.
It is accurate to see the engraving position of the stylus 3 from directly above the stylus 3. However, since the machining head 1a and the device itself are directly above the stylus 3, the engraving position can be seen from directly above the stylus 3. I can't do that, so I'll be looking at it from an angle. When viewed obliquely, it is difficult to accurately grasp the engraving position on the workpiece engraved surface 7 on the tip side of the stylus. At this point, since the center of the position where the projected figures 10 and 11 from the two light sources 5 and 6 overlap is the engraving position, the exact position of the engraving point on the workpiece marking surface can be confirmed, and the engraving position Can be accurately positioned.
Therefore, it is possible to perform high-quality engraving on the workpiece engraved surface at an accurate position by using the stylus 3 disposed at a desired distance from the workpiece engraved surface and arranged in the desired position and direction. That is, by the marking machine A of the present invention, it is possible to accurately form a clear character, a bar code, or the like with good display quality at a target position.

In order to set the length of the projected figures 10 and 11 on the marking surface 7 to 5 mm, the height (width in the vertical direction) of the detection lights 8 and 9 is adjusted to 5/(2 ^1/2 ). There is a need. In order to obtain the detection lights 8 and 9 of this width, it is necessary to adjust the light from the light emitting source built in the light sources 5 and 6 by the diameter and position of the optical system lens and then pass it through a slit of a predetermined width. You can
When the incident angle θ of the detection lights 8 and 9 is set to an incident angle other than about 45°, the relation of the movement distance of the stylus 3 in the Z-axis direction=the movement distance of the projected figures 10 and 11 is not established, but the stylus 3 It is also possible to adjust the relationship such that the moving distance in the Z-axis direction: the moving distance of the projected figure 10 (or the projected figure 11)=1:2.

In order to perform marking on the workpiece marking surface 7 using the marking machine A configured as described above, the detection lights 8 and 9 from the light sources 5 and 6 are set at 45° with respect to the extension axis of the stylus 3 as an example. While irradiating at the incident angle θ, the processing head 1 is moved to the marking position by the triaxial stage mechanism.
In order to perform accurate, clean and high-quality marking on the workpiece marking surface 7 by the marking machine A, the distance (distance) between the tip of the stylus 3 of the marking machine A and the workpiece marking surface 7 should be within the target range. Need to be adjusted. This is because the stylus 3 of the marking machine A oscillates in the vertical direction (front and rear in the axial direction of the stylus 3), and it is necessary to align the height positions of the workpiece marking surface 7 within the effective range of this vibration. ..

When the distance (spacing) between the tip of the stylus 3 and the workpiece marking surface 7 is shorter (narrower) than the target value, the projection pattern 10 generated by the detection light 8 on the workpiece marking surface 7 as shown in FIG. Is located on the side closer to the light source 5 along the X-axis and deviates from the point where the Z-axis passes through the workpiece marking surface 7. Further, the projection pattern 11 generated by the detection light 9 on the workpiece marking surface 7 is also located on the side closer to the light source 6 along the Y axis, and is out of the point where the Z axis passes through the workpiece marking surface 7.
When the distance (spacing) between the tip of the stylus 3 and the workpiece marking surface 7 is farther (wider) than the target value, the projection pattern 10 generated by the detection light 8 on the workpiece marking surface 7 as shown in FIG. Is located on the side farther from the light source 5 along the X-axis and deviates from the point where the Z-axis passes through the workpiece marking surface 7. Further, the projected figure 11 generated by the detection light 9 on the workpiece marking surface 7 is also located on the side far from the light source 6 along the Y axis, and deviates from the point where the Z axis passes through the workpiece marking surface 7.

If it is the state shown in FIG. 2, the tip position of the stylus 3 is finely adjusted upward, and if it is the state shown in FIG. 3, the tip position of the stylus 3 is finely adjusted downward, and the − mark is projected. By crossing the graphic 10 and the projected graphic 11 of the-mark, the vertical alignment of the stylus 3 can be completed, and the stamped position can be drawn at an appropriate position on the marking surface 7. If the lengths of the minus-marked projected figure 10 and the minus-marked projected figure 11 are set to proper lengths as described above, the projected figure 10 will start from the position where the projected figures overlap and become the plus sign. , 11 is the upper limit and the lower limit of the imprintable range up to the L-shaped range immediately before the two figures are separated from each other. Therefore, it is possible to complete both vertical positioning and horizontal positioning of the stylus 3.

Further, since the locus of movement of the minus-marked projected figure 10 by the detection light 8 coincides with the X axis and the locus of movement of the minus-marked projected figure 11 by the detection light 9 coincides with the Y-axis, from the direction of these minus signs X It is possible to know the directions of the axis and the Y axis on the marking surface 7. Therefore, the distance between the marking surface 7 and the tip of the stylus 3 can be adjusted within an appropriate range depending on the directions of the projected figures 10 and 11 by the detection lights 8 and 9 and the state of their intersections. On the other hand, the orientation of the stylus 3 can be adjusted accurately. Therefore, according to the marking machine A of the present embodiment, it is possible to carry out marking in the correct direction with respect to the correct position.
For example, the position where the two projected figures 10 and 11 on the workpiece marking surface 7 intersect is grasped as an embossing point, and the inclinations of the two projected figures on the workpiece with respect to the X axis and the Y axis are grasped. After the position of the work is corrected so as to eliminate the inclination and the positioning of the work with respect to the marking surface 7 is completed, the work can be stamped on the marking surface 7 with the stylus 3. For example, when the marking target range on the work is the machine name plate, a rectangular frame is formed on the machine name plate, so the orientation of the work is adjusted so that this rectangular frame matches the X axis and the Y axis. This allows the engraving direction to be adjusted accurately along the rectangular frame.
Next, in the case of the minus mark and the projected figure of the minus mark, since the parallel light of a fixed width and height is the guide light, there is an advantage that the distance to the work can be adjusted by changing the shape of the projected image. ..

It should be noted that in the above-described embodiments, the-marks are used as the projected figures 10 and 11, but the projected figures 10 and 11 do not have to have the same shape and may have different shapes, and the shape is also limited to the-mark. Absent.
For example, the projected figures 10 and 11 may be figures such as +, ◯, Δ, and □, and one may be a combination of + and the other is ◯. The sizes of the projected figures 10 and 11 do not have to be the same, and one shape may be large and the other may be small. For example, when the projected figure 10 is a large circle and the other is a small circle or a plus mark, the range in which the small circle or the plus mark is included in the range of the large circle is an appropriate distance range between the stylus 3 and the marking surface 7. It may be a structure that can be set.

In order to understand that the direction of the marking by the stylus 3 is proper, the projected figures 10, 11 can be easily understood so that the direction of the machining head 1 is correct with respect to the surface 7 to be marked on the work. It is desirable to select a projection figure that includes a straight line portion parallel to the X-axis direction or a straight line portion parallel to the Y-axis direction. If a projection figure including these straight line portions is selected, the distance between the stylus 3 and the marking surface 7 can be adjusted, and it is possible to check whether the direction of the stylus 3 is proper or not based on the projection figure. You can check. For example, if a − mark, a Δ mark, a □ mark, or the like is selected for the projected figures 10 and 11, the straight line portion parallel to the X axis or the Y axis of these shapes is inclined with respect to the straight line portion surrounding the marking surface 7. Since it can be determined whether the stylus 3 is present or not, the marking direction of the stylus 3 can also be confirmed. Alternatively, it is also possible to select -○- as the composite figure of the -mark and ◯ mark, and -Δ-, -◇-, -□-mark as other composite figures as the projected figure.

1... Machining head, 1a, 1b... Side surface, 2... Driving part, 3... Stylus, 3a... Tip part, 5... Light source, 5a... Support shaft, 6... Light source, 6a... Support shaft, 7... Engraved surface, 8 , 9... Detection light, 10, 11... Projected figure, θ=incident angle.

Claims (4)

A machining head is provided so as to be movable in the X-axis direction and the Y-axis direction along a direction parallel to the surface of the workpiece engraved surface and in the Z-axis direction that is close to and separated from the workpiece engraved surface. A stylus for stamping on the surface to be engraved on the workpiece is provided at the tip end of the machining head, the machining head is movable in the X-axis direction and the Y-axis direction orthogonal to each other, and in the X-axis direction and the Y-axis direction. A marking machine that is provided so as to be movable in the Z-axis direction orthogonal to each other, the axial direction of the stylus is aligned with the Z-axis direction, and the workpiece marking surface is arranged in a direction intersecting the Z-axis. Predetermined from the side of the machining head to the extension axis of the stylus toward the standard engraving position in front of the tip of the stylus on one side in the X-axis direction and one side in the Y-axis direction around the machining head. Two or more light sources are attached which irradiate the inspection light obliquely at an inclination angle of and move together with the processing head.
Of the plurality of light sources, the inspection light from one light source and the inspection light from the other light source are inspection lights that draw a projected pattern of each inspection light on the workpiece marking surface, and all of the above The irradiation angles of the inspection light with respect to the extension axis are equalized, and
Among the one light source and the other light source, the projection pattern irradiated from at least one light source to the workpiece marking surface includes a pattern having a length parallel to the X axis and a width parallel to the Y axis. , A projection pattern irradiated from the other light source onto the workpiece marking surface includes a figure having a length parallel to the Y-axis and a width parallel to the X-axis, and the workpiece marking surface at the standard marking position. An engraving machine with a guide light function, characterized in that the plurality of projection figures are inspection lights that are superposed at the central portion in the lengthwise direction when they are aligned. The guide light according to claim 1, wherein the inspection light emitted from the one light source and the other light source to the standard engraving position have equal incident angles with respect to the extension axis of the stylus. Stamping machine with functions. The projection pattern of the inspection light projected from the one light source onto the workpiece marking surface is a graphic including a negative shape along the X axis, and the projection pattern is projected from the other light source onto the workpiece marking surface. The figure is a figure including a − shape along the Y axis, and the composite projection figure formed from the plurality of projection figures at the time of the alignment is a figure including a − mark in the X axis direction and a − mark in the Y axis direction. The marking machine with a guide light function according to claim 1 or 2. A machining head is provided so as to be movable in the X-axis direction and the Y-axis direction along a direction parallel to the surface of the workpiece engraved surface and in the Z-axis direction that is close to and separated from the workpiece engraved surface. A stylus for stamping on the surface to be engraved on the workpiece is provided at the tip end of the machining head, the machining head is movable in the X-axis direction and the Y-axis direction orthogonal to each other, and in the X-axis direction and the Y-axis direction. A marking machine which is movably provided in the orthogonal Z-axis direction, the axial direction of the stylus is aligned with the Z-axis direction, and the workpiece marking surface is arranged in a direction intersecting the Z-axis.
Around the machining head, on one side in the X-axis direction and one side in the Y-axis direction, from the side of the machining head toward the standard engraving position in front of the tip of the stylus with respect to the extension axis of the stylus. A method of irradiating an inspection light obliquely at a predetermined same inclination angle and performing engraving using a marking machine equipped with two or more light sources that move together with the processing head,
The projection light emitted from the one light source onto the workpiece marking surface is irradiated with inspection light including a graphic having a length parallel to the X axis and a width parallel to the Y axis,
An inspection light including a figure having a length parallel to the Y-axis and a width parallel to the X-axis is applied to a projected figure irradiated from the other light source to the workpiece marking surface,
Adjusting the irradiation angle of all the inspection light in the direction in which the plurality of projected figures are overlapped when the workpiece engraved surface is aligned with the standard engraving position,
The position on which the plurality of projection figures on the work marking surface overlap is adjusted by moving the work marking surface along the extension axis direction of the stylus, and the intersecting position of the plurality of projection figures is used as the marking point. Grasping, grasping the inclinations of the respective projected figures with respect to the X-axis and the Y-axis in the overlapping state of the plurality of projected figures, and correcting the position of the work so as to eliminate the inclination, and with respect to the marking surface of the work. An engraving method using a marking machine with a guide light function, characterized in that after the positioning is completed, the work is engraved on the surface to be engraved with the stylus.

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