JP4036346B2 - Vibration pen marking device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an oscillating pen marking device provided with a mechanism for detecting malfunction, loss, breakage and the like of an oscillating pen.
[0002]
[Prior art]
In a production line for various parts, production numbers are stamped on the parts for management. For this engraving, a predetermined manufacturing number is engraved with a vibration pen engraving device conventionally provided in an automatic line, and after engraving, a pattern of engraved letters (alphabetic characters, numbers, etc.) is formed by a laser sensor, a photo sensor, or the like in an inspection process. Recognizing and detecting imprinting defects and non-engraved marks, etc., prevents the generation of defective products. If an imprinting error is missed, defective products are generated, which becomes a serious problem.
[0003]
[Problems to be solved by the invention]
However, in the case of the above-mentioned conventional example, a so-called closed check method is equipped with an advanced check function, and the quality of the engraved characters can be checked, and an imprint error can be almost completely prevented, but an expensive detection sensor such as a laser sensor is provided. There is a difficulty that you need. Further, the detection sensor such as a laser sensor may be relatively large and detection may be impossible depending on the shape of the object to be engraved, and the installation space for the entire apparatus may be large, which may cause problems in the installation location.
By the way, the main causes of the imprinting failure are a vibration failure of the vibration pen, an abnormality such as a missing or broken tip of the pen, and a failure of a servo mechanism for moving and controlling the vibration pen.
[0004]
The present invention has been made in view of such a conventional situation, and without using an expensive detection sensor such as a laser sensor, the vibration pen is used to detect abnormal vibrations such as a pen tip breakage or breakage. It is an object of the present invention to provide a vibration pen marking device that is detected by a touch sensor and can prevent a marking mistake on a workpiece to be stamped before or during marking.
[0005]
[Means for Solving the Problems]
As a means for solving the problem technically, the present invention is, in the vibration pen marking apparatus for performing predetermined marking in sent to the engraved object has vibration pen automatically line and the vibration pen marking apparatus, X There is a servo mechanism that controls the movement of the vibrating pen in the X, Y, and Z axis directions via an axis moving table, a Y axis moving table, and a Z axis moving table, and a holder is attached to the Z axis moving table. The vibration pen is detachably attached to the holder so as to protrude horizontally, and a vibration sensor for detecting the vibration of the vibration pen and inputting the detection signal to the control panel is attached to the mounting portion of the holder. A touch sensor is attached in the vicinity of the vibration pen marking device for detecting the presence or absence of abnormality of the vibration pen via a support plate and inputting the detection signal to the control panel. Is It is in a state of protruding toward the pen side, and before imprinting with the vibration pen, the vibration pen is moved by the servo mechanism and the pen tip is applied to the touch sensor to prevent the vibration pen from being damaged or broken. An abnormality signal is detected, and if there is no abnormality, an operation signal is commanded from the control panel to the operation panel for controlling the vibration pen marking device, and the vibration pen is vibrated by the servo mechanism to the object to be stamped. When a predetermined marking is performed and an abnormality is detected, a stop signal is commanded from the control panel to the operation panel, the movement of the vibrating pen is stopped, and during marking with a normal vibrating pen, wherein the vibration state of the vibration pen is detected by the vibration sensor, when an abnormality occurs in the vibration is commanded stop signal to the control panel from the control panel, that the marking action of the vibration pen is stopped The vibration pen marking device which is intended to be subject matter.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a plan view showing the entire engraving process. An automatic line 1 is provided at a substantially central portion, and an object to be engraved 2 such as various parts is carried in from a carry-in portion 1a on the right side, and a vibration pen marking device 3 Positioned to stop, a predetermined number of manufacturing is engraved at a predetermined location by the vibration pen 4, and is transferred step by step after the marking, and sequentially transferred from the left unloading unit 1c to the next process through the standby unit 1b. .
[0007]
The vibration pen marking device 3 has a servo mechanism for controlling the movement of the vibration pen 4 in the X, Y, and Z axis directions as shown in FIGS. 2 and 3, that is, for driving the X axis attached to the base 5. The servo motor 5a moves the X-axis moving table 6 back and forth along the screw 5b in the X-axis direction. The Y-axis driving servo motor 6a attached to the X-axis moving table 6 causes the Y-axis moving table 7 to move along the screw 6b. The Z-axis moving table 8 moves back and forth in the Z-axis direction along the screw 7b by the Z-axis driving servomotor 7a attached to the Y-axis moving table 7.
[0008]
A holder 9 is attached to the Z-axis moving table 8, and the vibrator pen 4 is detachably attached to the holder 9 so as to protrude horizontally, and the pen tip is on the side of the automatic line 1 as shown in FIG. The vibration sensor 10 is attached to the upper surface of the attachment portion of the holder 9.
[0009]
For example, a known high-precision vibration sensor can be used as the vibration sensor 10, and the presence or absence or change of vibration of the vibration pen 4 is sensitively detected, and the vibration level is displayed on the monitor 11 as shown in FIG. In addition, a detection signal is input to the control panel 12.
[0010]
Reference numeral 13 denotes a touch sensor, which is attached to the vicinity of the vibration pen marking device 3 via a support plate 14 as shown in FIG. 1, and its detection portion 13a protrudes horizontally and vertically toward the vibration pen 4 side. It is in the state.
[0011]
As this touch sensor 13, for example, a known one-direction detection type touch sensor can be used, and the vibrating pen 4 is moved by a predetermined amount in the X and Y axis directions and the pen tip is opposed to the detection unit 13 a of the touch sensor 13. Then, by moving the pen tip of the vibration pen 4 by a predetermined amount in the Z-axis direction, the detection unit 13a is touched. If the amount of movement in the Z-axis direction is a constant value (set pulse), the vibration pen 4 is abnormal. When the amount of movement in the Z-axis direction exceeds a certain value, it is detected that the vibration pen 4 has an abnormality such as a breakage or breakage. The detection signal of the touch sensor 13 is input to the control panel 12.
[0012]
Reference numeral 15 denotes an operation panel for controlling the vibration pen marking device 3. The operation panel 15 sets in advance marking information on the workpiece 2, movement information to the touch sensor 13, and the like. The data is input to the control panel 12 and stored. The control panel 12 outputs an operation signal and a stop signal to the operation panel 15 and the automatic line 1.
[0013]
In the present invention configured as described above, a predetermined character is placed at a predetermined position of the object 2 by the vibration pen marking device 3 while the object 2 is intermittently conveyed step by step by the automatic line 1. After engraving, it is sent to the next assembly process.
[0014]
When the workpiece 2 is positioned on the vibrating pen marking device 3 from the carry-in portion 1a, an operation signal is commanded from the control panel 12 to the operation panel 15, and the vibrating pen 4 is first moved by the servo mechanism to move the pen tip. If there is no abnormality detected by touching the touch sensor 13, the detection signal is input to the control panel 12, an operation signal is commanded from the control panel 12 to the operation panel 15, and the vibration pen 4 is vibrated by the servo mechanism. A predetermined marking is performed on a predetermined portion of the stamp 2. The servo mechanism detects and displays an error on the operation panel 15 via the control panel 12, both in the control itself and in mechanical connection.
[0015]
When an abnormality is detected in the pen tip by the touch sensor 13, the detection signal is input to the control panel 12, and a stop signal is commanded from the control panel 12 to the operation panel 15, and the movement of the vibration pen 4 is stopped. At the same time, an alarm lamp on the operation panel 15 is turned on or an alarm sound is emitted to notify the operator that the vibration pen 4 has an abnormality such as a defect or breakage. At this time, a signal is commanded from the control panel 12 to the automatic line 1 so that the work is not disrupted, and the stopped state is maintained.
[0016]
When the operator replaces the vibration pen with a new one, the pen tip is checked and inspected by the touch sensor 13, and if there is no abnormality, the marking work by the vibration pen 4 is performed as described above. Accordingly, it is possible to prevent unmarked or imprinted defects caused by an abnormality such as a pen tip breakage or breakage before the engraving. When a correction is necessary for the movement control of the servo mechanism attached to the replaced new vibration pen, the correction value is input to the operation panel 15 and reset.
[0017]
During marking with a normal vibration pen 4, the vibration state of the vibration pen 4 is detected by the vibration sensor 10, displayed on the monitor 11, and a detection signal is input to the control panel 12. When the following occurs), a stop signal is commanded from the control panel 12 to the operation panel 15, and the marking operation of the vibration pen 4 is stopped. Accordingly, it is possible to prevent a marking error on the workpiece 2 at the stage of marking, and to know a vibration failure of the vibration pen 4 or a malfunction of the servo mechanism. Also at this time, the automatic line 1 is maintained in a stopped state in order to prevent confusion in work.
[0018]
When the proper marking work by the vibration pen 4 is completed, the automatic line 1 is activated by a command signal from the control panel 12 to convey the workpiece 2 to the standby unit 1b, and at the same time, the subsequent workpiece is transferred from the carry-in unit 1a. It is conveyed to the vibration pen marking device 3 and positioned. That is, the object to be engraved is advanced by one step.
Conventionally, in the standby section 1b, the inspection and quality of the engraved characters are confirmed by a detection sensor such as a laser sensor. However, in the present invention, such inspection after engraving is not performed, that is, a detection sensor such as a laser sensor. Is not disposed in the standby unit 1b.
[0019]
When the subsequent marking object 2 is positioned on the vibration pen marking device 3 and the workpiece confirmation sensor 16 (see FIG. 1) confirms the marking object 2, the confirmation signal is input to the control panel 12. In response to the command signal, the positioning pin 17 protrudes to hold the workpiece 2 and an operation signal is commanded from the control panel 12 to the operation panel 15, and the pen 4 is moved to the touch sensor 13 by moving the vibrating pen 4 as described above. Work to hit is resumed.
[0020]
Then, if there is no abnormality in the pen tip, the marking work by the vibration pen 4 is performed as described above, and when this is completed, the workpiece 2 is again advanced one step. By repeating such a cycle, the marking process for the workpiece 2 is performed automatically and continuously. The object to be stamped 2 conveyed to the standby unit 1b after the marking is sequentially conveyed to the next process through the unloading unit 1c.
[0021]
【The invention's effect】
As described above, according to the present invention, the vibration pen is used as a touch sensor prior to the marking in the step of marking a predetermined character on a predetermined portion of the object to be stamped by the vibration pen marking device disposed on the automatic line. By applying the open method to detect pen tip defects and damage in advance and detect and check the vibration of the pen with a vibration sensor during engraving. Engraving on the object to be engraved before or during engraving It is possible to prevent mistakes (no marking, imprinting defects, etc.) and to omit the inspection process after marking.
Therefore, it is impossible to confirm the inspection and quality of the stamped characters as in the conventional method, but it is possible to prevent the occurrence of defective products due to mistakes in stamping, eliminating the need for expensive detection sensors such as laser sensors. Because it is compact, detection is not impossible due to the shape of the object to be engraved, the installation space of the entire device is small, there are no problems in the installation location, and it is easy to handle and inexpensive. There is an effect.
[Brief description of the drawings]
FIG. 1 is a plan view showing an entire marking process to which a vibrating pen marking device according to the present invention is applied.
FIG. 2 is a plan view showing a servo mechanism of the vibration pen marking device.
FIG. 3 is an elevation view of the servo mechanism.
FIG. 4 is a block diagram showing a drive mechanism of the vibration pen marking device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Automatic line 1a ... Carrying-in part 1b ... Standby part 1c ... Unloading part 2 ... Marking object 3 ... Vibrating pen marking device 4 ... Vibrating pen 5 ... Base 5a ... Servo motor for X-axis drive 5b ... Screw 6 ... X-axis Drive base 6a ... Y-axis drive servo motor 6b ... Screw 7 ... Y-axis movement base 7a ... Z-axis drive servo motor 7b ... Screw 8 ... Z-axis movement base 9 ... Holder 10 ... Vibration sensor 11 ... Monitor 12 ... Control panel DESCRIPTION OF SYMBOLS 13 ... Touch sensor 13a ... Detection part 14 ... Support plate 15 ... Operation panel 16 ... Work confirmation sensor 17 ... Positioning pin

Claims (1)

In a vibration pen marking device that performs a predetermined marking with a vibration pen on a workpiece to be stamped sent by an automatic line, the vibration pen marking device is configured to perform the above operation via an X-axis moving table, a Y-axis moving table, and a Z-axis moving table. A servo mechanism that controls the movement of the vibrating pen in the X, Y, and Z axes. A holder is attached to the Z axis moving base, and the vibrating pen is detachably attached to the holder and protrudes horizontally. In addition, a vibration sensor for detecting the vibration of the vibration pen and inputting the detection signal to the control panel is attached to the attachment portion of the holder, and a support plate is provided in the vicinity of the vibration pen marking device. A touch sensor for detecting the presence or absence of abnormality of the vibration pen and inputting the detection signal to the control panel is attached, and the detection unit of the touch sensor is in a state of protruding toward the vibration pen side, Vibrator pen Before engraving, the vibration mechanism is moved by the servo mechanism, and the pen tip is applied to the touch sensor to detect whether the vibration pen is broken or broken. If there is no abnormality, the vibration is generated from the control panel. When an operation signal is commanded to the operation panel for controlling the pen marking device, the vibration pen is vibrated by the servo mechanism, a predetermined marking is performed on the workpiece, and the control is performed when an abnormality is detected. When a stop signal is commanded from the panel to the operation panel, the movement of the vibration pen is stopped, and during the marking with a normal vibration pen, the vibration state of the vibration pen is detected by the vibration sensor, and the vibration is abnormal. When it occurs, a stop signal is instructed from the control panel to the operation panel, and a vibration pen marking operation is stopped .

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