JP3684872B2 - Stamping device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a marking device for marking a sheet or a plate material.
[0002]
[Prior art]
A marking device for marking a printed wiring board is disclosed in Japanese Patent Laid-Open No. 4-42991. This consists of a stamping machine, an introduction conveyor for sending the wiring board, a width adjusting mechanism for aligning the wiring board from the introduction conveyor with the marking position in the marking machine, and a delivery conveyor for receiving and sending the printed wiring board. It is structured as a thing.
[0003]
[Problems to be solved by the invention]
In the above-mentioned marking device, since the positioning to the marking position is performed by bringing the wiring board as the object to be stamped, the wiring board is often scratched during the positioning, and is necessary for the positioning. It was impossible to shorten the operation time. Moreover, it was not possible to automate the change of product type for workpieces with different thicknesses.
[0004]
The present invention has been made in view of the above points, and an object of the present invention is to provide a marking device capable of performing marking at a high speed without causing scratches on a workpiece to be marked during alignment. Another object of the present invention is to provide a marking device capable of automating the type change for the workpieces having different thicknesses.
[0005]
[Means for Solving the Problems]
Accordingly, the present invention has a conveying means for conveying a workpiece, which is a sheet or a plate material, and a marking head composed of an upper mold and a lower mold, and lowers the upper mold while supporting the lower surface of the workpiece conveyed by the conveying means with the lower mold. a stamp for applying a marking against the workpiece by causing, based an image processing camera that captures the conveyed to the marking position workpiece, the thickness sensor for measuring the thickness of the workpiece, the image obtained by the image processing camera And a control means for aligning the upper and lower workpieces of the marking head of the marking machine and adjusting the vertical position of the lower mold of the marking head based on the thickness data measured by the thickness sensor . The vertical position adjustment is performed by adjusting the vertical position of the lower die of the marking head with reference to the upper surface side of the workpiece . The positioning of the marking position is not performed by the position adjustment on the workpiece side, but is performed on the marking head side of the marking machine, and the vertical position adjustment according to the thickness of the workpiece is also performed on the lower mold on the marking head side .
[0006]
The lower die of the marking head of the stamping machine is preferably one whose vertical position is changed by horizontal movement of the wedge cam.
[0007]
It is desirable that the control means check the marking applied to the workpiece based on the imaging result of the workpiece after the marking by the image processing camera, and optimize the next marking operation based on the check result. A stable quality stamp can be obtained, and even if the marking head is replaced, adjustment by a person becomes unnecessary.
[0009]
Further, the conveying means is composed of a plurality of conveyors installed in parallel, and the interval between the conveyors is variable by the lateral movement of the other conveyors with respect to the fixed-side conveyor located on one side of these conveyors. If the stamping machine is installed on the fixed conveyor side, it is easy to cope with different workpiece types.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on an example of an embodiment. As shown in FIG. 2, the stamping apparatus includes a conveyor 1 for transporting a workpiece (a stamped object) 9 such as a sheet or a plate, and the conveyor 1. An engraving machine 2 installed on the side, an image processing camera 3 for imaging the workpiece 9 conveyed by the conveyor 1, a thickness sensor 4 for measuring the thickness of the workpiece 9 conveyed by the conveyor 1, and the image processing camera 3 and the thickness It comprises control means for taking in the output of the sensor 4 and controlling the stamping machine 2 and the conveyor 1, and the conveyor 1 here is constituted by an adsorption type.
[0011]
As shown in FIG. 7, the conveyor is formed by disposing a suction pipe 11 connected to the blower 12 on the lower side of the main frame 10 and an endless belt 13 with a suction hole around them. 1 attracts and conveys the work 9 on its lower surface side.
[0012]
In the illustrated example, three conveyors 1 are arranged in parallel, and the workpieces 9 are simultaneously sucked by the three conveyors 1 and are conveyed by the three conveyors 1 that are operated synchronously. As shown in FIG. 6, the conveyor 1 on one side is fixedly installed, but the other two conveyors 1 have different intervals with the fixed side conveyor 1 in order to cope with different widths of workpieces 9. It is installed so that it can. That is, the two conveyors 1 and 1 on the moving side have nuts 15 fixed to the main frame 10, and the nuts 15 are screwed into the ball screws 16 and 16, respectively. The conveyor 17 is moved laterally by rotating the ball screw 16 by the motor 17, and the timing at which the number of teeth is different is transmitted to the rotation transmitting portion from the motor 17 to the two ball screws 16, 16. By using the pulleys 18 and 18, the lateral movement amount of the distant moving conveyor 1 is larger than the lateral moving amount of the moving conveyor 1 close to the fixed conveyor 1 during the lateral movement. .
[0013]
FIG. 8 shows the suction chamber 6 for transferring the workpieces 9 stacked on the lifter 7 one by one to the suction-type conveyor 1, and is moved up and down by a vertical drive device 60 using a cam and a link. The adsorbing chamber 6 that adsorbs the workpiece 9 adsorbs the workpiece 9 when it descends, releases the adsorption after the adsorbing workpiece 9 is adsorbed by the adsorption-type conveyor 1, and prepares for the transfer of the next workpiece 9. . The suction chamber 6 is provided for each of the three conveyors 1 and simultaneously moves horizontally when the moving conveyors 1 and 1 move horizontally.
[0014]
A second adsorption chamber 8 and a blower 85 are arranged beside the lifter 7. The second adsorption chamber 8 is for adsorbing and lifting the corners of the stacked workpieces 9 and by blowing air from the side with the blower 85 in the raised state, only one sheet is separated.
[0015]
Of the three conveyors 1, the stamping machine 2 installed on the side of the conveyor 1 on the fixed side stamps the surface of the work 9 by lowering the upper mold 21 while supporting the lower surface of the work 9 with the lower mold 22. As shown in FIGS. 3 to 5, the upper die 21 and the lower die 22 which are marking heads are attached to a frame 20 installed on an XY table 23. The lower mold 22 can be adjusted in the Z-axis direction, that is, in the vertical position so that the rotation θ can be adjusted.
[0016]
The XY table 23 is screwed with a ball screw that is rotationally driven by the X-axis and Y-axis motors 23a and 23b, and changes the XY position by the rotation of the motors 23a and 23b. The frame 20 provided on the XY table 23 holds a cam 24 whose upper surface is inclined so as to be slidable in the horizontal direction, and is screwed with a ball screw rotated by a motor 24a. A cam follower 24 b suspended from the lower mold 22 is in contact with the cam 24. The cam 24 is moved horizontally by the rotation of the motor 24a, and the lower mold 22 having the cam follower 24b in contact with the inclined surface of the upper surface of the cam 24 moves up and down with the horizontal movement. The upper mold 21 is attached to the frame 20 via a vertical movement actuator (cylinder) 26 and a θ-axis rotation correction motor 25.
[0017]
The image processing camera 3 attached to the stamping machine 2 captures the upper surface side of the workpiece 9 that has been transported by the conveyor 1 and transported to the stamping machine 2, and the control means also captures the captured image. In addition, the positions of the upper mold 21 and the lower mold 22 are adjusted to perform alignment with the workpiece 9. That is, from the image captured by the image processing camera 3, a correction amount for the positional deviation of the workpiece 9 in the XY direction and the angular deviation around the Z axis θ is obtained, and the positional adjustment of the XY table 23 and the rotational adjustment of the upper mold 21 are obtained. And do. Further, the control means adjusts the vertical position of the lower mold 22 based on the measurement result of the thickness of the workpiece 9 conveyed by the conveyor 1 by the thickness sensor 4.
[0018]
FIG. 1 shows an operation flow for the position correction operation. The thickness of the workpiece 9 which is conveyed by the conveyor (C / V) 1 and stopped at the marking station where the stamping machine 2 is installed is measured, and the amount of movement of the cam (wedge) 24 is calculated. 9 is imaged and the position of the workpiece 9 is measured to inspect the amount of displacement, and the upper die 21 and the lower die 22 are moved in accordance with the required relative marking position from the end face of the workpiece 9 and the workpiece is moved. The upper and lower positions of the lower mold 22 are adjusted in accordance with the thickness 9 and the upper mold 21 is lowered to perform the marking.
[0019]
Since the alignment for marking is not performed by the movement of the workpiece 9 but on the marking machine 2 side, it is not necessary to adjust the width of the workpiece 9 at the time of alignment. In addition, based on the thickness measurement result of the workpiece 9 by the thickness sensor 4, the vertical position of the lower mold 22 that supports the lower surface of the workpiece 9 is adjusted at the time of engraving. It is possible to automatically respond to the product type change. Furthermore, the processing time can be shortened compared with the case where the position adjustment is performed by moving the workpiece 9 side.
[0020]
After engraving, the image processing camera 3 takes an image of the imprint printed on the work 9, checks the engraved character position, engraving depth, scratches around the engraved character, etc., and determines pass / fail, as well as the engraved character position and the engraved depth. Based on the check result, the position correction amount for the position measurement result and the thickness measurement result at the time of engraving the next workpiece 9 is optimized. Therefore, even if the upper mold 21 and the lower mold 22 are exchanged, adjustment by a person is unnecessary. In addition, the quality of the stamped character depth is stable.
[0021]
【The invention's effect】
As described above, the present invention includes a conveying unit that conveys a workpiece, which is a sheet or a plate material, and an engraving head that includes an upper die and a lower die, and supports the lower surface of the workpiece conveyed by the conveying unit with the lower die. A marking machine for marking the workpiece by lowering the image, an image processing camera for imaging the workpiece conveyed to the marking position, a thickness sensor for measuring the thickness of the workpiece, and an image obtained by the image processing camera and control means for adjusting the vertical position of the lower mold engraved head based on the thickness data measured by the thickness sensor performs positioning with respect to the upper and lower molds of the work of the marking head of the stamp based on, imprinted the vertical position adjustment of the head, intended to be made in the vertical position adjustment of the lower mold engraved head upper surface of the workpiece as a reference, the alignment of the marking position of the workpiece-side position adjustment Instead of doing so, in order to perform in marking head side of the stamp, on it is a have the scratches or the like occurs in the workpiece during the alignment, a high-speed processing is possible, moreover vertically according to the thickness of the workpiece Since the position adjustment is also performed on the lower die on the marking head side, it is possible to automatically and quickly respond to product changeover depending on the thickness of the workpiece.
[0023]
Then, the control means checks the marking made on the workpiece based on the imaging result of the workpiece after the marking by the image processing camera, and optimizes the next marking operation based on the check result. Therefore, even if the marking head is replaced, etc., it is possible to automatically cope with this, so that adjustment by a person becomes unnecessary.
[0025]
Further, the conveying means is composed of a plurality of conveyors installed in parallel, and the interval between the conveyors is variable by the lateral movement of the other conveyors with respect to the fixed-side conveyor located on one side of these conveyors. If the stamping machine is installed on the fixed conveyor side, it is easy to cope with different workpiece types.
[Brief description of the drawings]
FIG. 1 is a flowchart showing an operation in an example of an embodiment of the present invention.
FIGS. 2A and 2B show the overall configuration of the above, wherein FIG. 2A is a plan view, FIG. 2B is a front view, and FIG. 2C is a partial cross-sectional view.
FIG. 3 is a perspective view of the same stamping machine.
FIG. 4 is a perspective view showing a vertical movement and rotation adjustment mechanism of the upper mold of the same.
FIG. 5 is a perspective view showing the vertical position adjusting mechanism of the lower mold same as above.
FIG. 6 is a perspective view showing a lateral movement mechanism of the adsorption type conveyor of the above.
FIG. 7 is a cutaway perspective view of the same adsorption type conveyor.
FIG. 8 is a front view showing the same suction type conveyor and suction chamber.
[Explanation of symbols]
1 Conveyor 2 Marking Machine 3 Image Processing Camera 4 Thickness Sensor 9 Workpiece

Claims (4)

Conveying means for conveying a workpiece, such as a sheet or plate material, and a marking head comprising an upper mold and a lower mold, and lowering the upper mold while supporting the lower surface of the workpiece conveyed by the conveying means with the lower mold. A stamping machine that stamps the stamp, an image processing camera that captures the workpiece conveyed to the stamping position, a thickness sensor that measures the thickness of the workpiece, and a stamping head of the stamping machine based on the image obtained by the image processing camera And a control means for adjusting the vertical position of the lower die of the marking head based on the thickness data measured by the thickness sensor and adjusting the vertical position of the marking head. An engraving apparatus characterized in that the adjustment is performed by adjusting the vertical position of the lower die of the engraving head with reference to the upper surface side of the engraving head . 2. The marking device according to claim 1, wherein the lower die of the marking head of the stamping machine is one whose vertical position is changed by the horizontal movement of the wedge cam.   The control means checks the marking applied to the workpiece based on the imaging result of the workpiece after the marking by the image processing camera, and optimizes the next marking operation based on the check result. Item 3. The marking device according to item 1 or 2. Conveying means consists of a plurality of conveyors installed in parallel, and with respect to the fixed side conveyor located on one side of these conveyors, the distance between the conveyors is variable by the lateral movement of the other conveyors, The stamping device according to any one of claims 1 to 3, wherein the stamping machine is installed on the fixed conveyor side.

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