JPS6016377A - Marking device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Technical Field) This invention applies marks such as letters, figures, patterns, etc. to objects to be processed, such as metal alloy products such as steel products, various ceramic products, or three-dimensionally shaped synthetic resin products. Regarding the marking equipment that makes mechanical markings, in particular, it improves the marking performance of mechanical markings, and also periodically jerks the marking locus, and when the marking performance deteriorates, the marking tool is moved relatively backwards. This invention relates to a marking device that enables corrections such as tIC re-marking processing.

[Prior art]

Conventionally, there are knock-type or 17-type hand-held mark pens that are used to mechanically engrave marks on objects to be processed, but these can only be used to engrave simple marks; It is not suitable for cases in which marks are repeatedly engraved or complex marks are to be engraved, and the marking accuracy is also poor.

With this improvement, the C marking tool is attached to the spindle and the marking tool is moved relative to the object to be processed.X)/7
There is a device that can perform controlled movement in three axes of direction and one axis of rotation of the object to be processed. However, even with such a marking device, there is no diamond or cubic nitride cut 1 at the axial center of the tip of the marking tool.
Since the configuration is such that marking is performed by attaching an ultra-hard material body such as one element, moving the ultra-hard material body, and cutting by rotational drive, it is difficult to obtain a wide marking trajectory, and it is difficult to obtain a wide marking trajectory. It also required a lot of bodies. Furthermore, this device is configured to only continue automatic operation without performing corrective marking based on a trajectory check such as determining the marking property of the marking trajectory. If the marking conditions such as relative movement in the XY axis directions between the marking tool and the workpiece change significantly, it will not be possible to deal with this change.
This may result in changes in the marking properties, and as a result, it may not be possible to obtain the optimum marking over the entire marking trajectory, resulting in an unsightly mark, or marking may occur on some or many objects later. The process had to be reprocessed, which caused problems such as disruption to the process.

〔the purpose〕

Therefore, the present invention was developed by focusing on the above-mentioned conventional problems, and its purpose is to eccentrically attach an ultra-hard material body to the tip of a marking position tool,
Eccentric rotary cutting of the ultra-hard material improves marking performance, and by checking the marking trajectory by detecting and determining the marking condition from moment to moment,
It detects the deterioration of the engraving condition that occurred during marking, and based on this detection signal, the marking tool is moved relatively back along the mark path to enable correction processing such as re-engraving processing, covering the entire marking trajectory. To provide a marking device that improves marking performance and ensures marks with excellent appearance.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail based on FIGS. 1 and 2.

FIG. 1 is a schematic diagram showing an embodiment of a marking device of the present invention for mechanically marking a mark on an object to be processed. In the drawings, reference numeral 1 denotes a table on which the object to be processed 2 is placed, and X
The Y-axis moving device M3 moves the XY axis between the marking tool 4 and the object to be processed 2 so that the marking locus matches the mark shape.
The relative movement in the planar direction is applied at a predetermined constant speed or at a controlled speed as desired at individual marking locations. Here, the table 1 is a so-called cross table that is movable in each of the X and Y axes. ing. Although the configuration for moving in the Y-axis direction is not shown in the figure, it has the same configuration as the configuration for feeding movement in the X-axis direction. As a result, the tip of the marking tool 4 supported by the fixed part becomes movable within the XY-axis plane relative to the workpiece 2 placed on the cross-taple 1, and the shape of the mark to be engraved can be changed.
The device converts the mark into numerical values, and using this numerical information, it is possible to move while sequentially drawing a marking locus that is the same as the shape of the mark. Further, the marking tool 4 is replaceably attached to the spindle 8, and the spindle 8 is attached to the bearing body 9.
It is rotatably attached to the shaft via a thrust bearing 9A and a radial bearing 9B, and a desired rotation can be obtained by a drive motor 10. The bearing body 9 is attached by a tool feeding device 7 to a support body 12 that moves up and down along a column 11 erected from a fixed portion. Sliding movement in the vertical direction is possible through dovetail grooves and dovetails between the column 11 and the support 12, and a pinion is attached to the shaft of the drive motor 13, and the support 12 is provided with a pinion in the vertical direction. Racks extending in the direction are respectively formed, and a desired controlled feed in the vertical direction is given to the marking tool 4 by the drive 13, so that the marking depth with respect to the workpiece 2 is maintained at an appropriate value. There is.

During marking, when the marking performance deteriorates due to wear and tear of the marking tool 4 or changes in marking conditions such as relative horizontal movement, this is detected and the marking tool 4 is moved relative to the marking tool 4 based on this detection signal. It is configured to enable corrective processing such as re-engraving by re-engraving by re-engraving the mark, and to ensure reliable, high-precision engraving without omissions and excellent appearance. That is, a tracking device @14 that follows the marking locus is provided on the circumferential side of the bearing body 9. In other words, a disc-shaped gear 16 rotatably attached to the outer periphery of the bearing body 9 via a bearing 15 and a similar rotary disc 17 are integrally coupled by a coupling member 18. The gear 16 and the disk 17 are configured to be rotatable under control via a gear 18 by a drive motor 19 provided on the support 12 . A follow-up head 20 is mounted on one side of the disc 17 on the arm 2.
1. In such rotational control of the follower 14, the operation of the follower 14 is controlled so that the follower head 20 is always located within the marking trajectory on the back side of the marking tool 4 with respect to the engraving advancing direction along the marking trajectory. It is controlled by a command from the device, detection of movement of the cross table 1, or contact avoidance operation based on contact detection. The tracking head 20 is provided with a detection bag @ 23 that converts reflected light from a marking trajectory in the tracking device into an electrical signal. This device @23 is a light emitting diode 2 that emits inspection light toward the marking trajectory.
4 and a photoelectric element such as a transistor 25 which receives reflected light from the marking locus and converts it into an electrical signal corresponding to the received light m. Such a detection device 23 utilizes the fact that the better the engraving accuracy is, the greater the amount of reflected light received and/or maintains a constant state without change. It is possible to judge the quality of the data and check the trajectory.

The electrical signal from the detection device 23 is input to the comparator 26, which compares the input electrical signal with a predetermined In value and outputs a discrimination signal. Here, the reference value is determined to correspond to a state of marking with high marking performance. .

When the level of the electric signal has a deviation of a predetermined value or more from the base i1j' value, the discrimination signal So is output, and in other ranges, the discrimination signal S1 is output. Such discrimination signal So or Sl is input to the arithmetic circuit 27. This arithmetic circuit 27 controls the command signal for NC control according to the program of the numerical control device 28 based on the discrimination signal, and the drive motor 6.1
The rotational position, rotational speed, etc. of 3 are detected by each rotation detector 6A, 1.
Since the signal from 3A is returned to the device 28,
Control is possible using the discrimination signal from the circuit 27. The numerical control device 28 uses the command signal output from the arithmetic circuit 27 to control the marking tool 4 when the marking is defective.
Either store it in advance or reread it by a command signal and perform correction processing by re-engraving by relatively backtracking along the marking machining route that has already passed the machining process, to bring the marking property to the desired setting state such as the optimum state. Drive motor 6 to hold
．． It is designed to control 13. The drive motor 13 is used for the tool feeding device 7, and the drive motor 6 is used for the XY-axis moving device 3, but when pulse motors are used as these motors, the The rotation angle of the motor is accurate, and for example, the amount of movement can be directly controlled by the number of command pulses, and the movement or rotational speed can be directly controlled by the frequency of command pulses. A punch-loop control method may also be used.

Further, as shown in FIG. 1 or 1 in FIG. 2, the marking tool 4 has an ultra-hard material body 4Δ, 4B attached to the tip thereof, preferably eccentrically by a desired minute amount from the rotation axis,
Marks are engraved by eccentric rotation cutting of the ultra-hard material bodies 4A and 4B. For example, as shown in Fig. 1, the carbide ¥1 material body 4A is formed into a bite shape, or as shown in Fig. 2, superhard material particles 4B are mixed with an alloy and then solidified into a predetermined fixed state. , there is one that enables engraving cutting at the protruding parts of particles. As the ultra-hard material particles 4Δ, 4B, there is a sintered body obtained by fixing or baking fine powder or particles of cubic boron nitride (CBN) or diamond. Diamond and CBN are artificially created under high pressure and high temperature using ultra-high pressure generators. Diamond is made by mixing graphite powder with powders of catalyst materials such as cobalt, nickel, iron, etc., and producing approximately 60 K bar at a temperature of 1600°C.
Diamond powder can be synthesized in more than 20 minutes by applying a pressure of In the case of CBN, boron nitride can be synthesized by treating boron nitride at a high temperature and pressure of about 5° Kbar for about 30 minutes or more, for example, at a temperature of 1300 to 140° C. and a pressure of about 5° Kbar. The hardness of these synthetic particles is approximately 3,000 kg per square inch, but when diamond and CBN are single crystals, they are weak in some respects, but when they are sintered into fine powders, they become uniform throughout and have no drawbacks. Diamond's sintered tools are made by mixing diamond powder or particles with a binder metal such as iron, cobalt, nickel, etc., forming it into a pellet if necessary, and processing it during deformation. Pressure sintering is performed, but the CBN sintered tool is processed and sintered onto the surface of the desired base material.Also, CBN sintered tools are made by mixing CBN powder or particles with metals, ceramics, metals, etc., and pelletizing as necessary.・Sintered in the same way.

One ultra-hard material manufactured by this method 4A, 4B
As shown in FIG. 1 or FIG. 2, both are preferably mounted with a predetermined slight eccentricity with respect to the shaft center. The ultra-hard material bodies 4A and 4B are configured so that wide marks can be stamped more effectively.

Next, I will explain the action.

When marking by mechanical engraving, marking tool 4
The marking tool 4 is rotated by the drive motor 1o at a desired number of rotations, and the marking tool 4 is fed by the drive motor 13 via the spindle 8 so as to achieve a predetermined marking depth. Therefore, since the marking tool 4 has the carbide V1 material bodies A and 4B attached to the tip thereof preferably eccentrically with respect to the axis, the carbide V1 material bodies 4Δ and 4B rotate eccentrically. The cutting action is performed moment by moment along a desired trajectory by the XY-axis moving device 3, thereby making it possible to engrave a desired wide mark. The marking can be uniformly obtained over the entire marking trajectory by three-axis control movement and by maintaining marking conditions such as the material of the object 2 to be processed. However, when the marking strip 1 changes due to the cause of the scratches, and accordingly, when detecting a spot on the marking trajectory where excess, deficiency, or other unevenness exceeds a predetermined state, the detection device 23
captures the change in the amount of reflected light received from the marking trajectory, immediately detects this as a value different from the previous detection signal, and outputs the detection signal to the comparator 26. Comparator 2
At step 6, this detection signal is compared with a reference value, and a discrimination signal So or Sl is output. First calculation circuit 2
7, based on this discrimination signal So or Sl, interrupts the NC-controlled X, Y-axis, and Z-axis command signals according to the program, and immediately instructs the numerical control device 28 to return to the detection position by the detection device 23. Outputs a signal to. In response to this, the numerical control device 28 moves the marking tool 4 relatively backward, performs the re-marking process from the detection position, and maintains the marking property above a predetermined state. By detecting and determining the engraving state of the marking locus from time to time in this way, correction processing by re-engraving becomes possible, and it is possible to improve the engraving performance over the entire marking locus. In addition, even if the corrective processing by re-engraving as described above does not improve the marking properties of the relevant location, etc., the detection device 23 outputs a determination signal indicating that the marking is defective at the same location again. is the arithmetic circuit 2
7, it determines this and outputs a signal to interrupt or stop the engraving process to the numerical control device @28 to stop the engraving process, and also outputs a snow warning from a lamp or a buzzer.
Mechanical equipment: It is possible to prevent the production of defective stamps by checking the machine.

Note that this invention is not limited to the above embodiments,
Of course, various applications and modifications are possible. In this embodiment, for example, the XY-axis moving device is explained using a loss table that can move freely in the XY-axis plane, but the present invention is not limited to this. It is also possible to do this. In addition, to detect the state of the engraving process, we use micro-irregularity detectors that use one or more touch caps installed in parallel, depth detectors such as stylus or air micrometers that detect the depth of engraving from the surface, and other devices. can be used.

〔effect〕

As is clear from the above description, according to the present invention, deterioration of the marking condition that occurs during marking is detected by performing a trajectory check that detects and discriminates the marking condition of the marking trajectory moment by moment. Based on the signal, the marking tool is moved back relative to the object to be processed to enable corrective processing by re-engraving, improving marking performance over the entire marking locus, and ensuring marks with excellent appearance.

In addition, since the tip of the marking tool is mounted eccentrically on the ultra-hard material body, eccentric rotation cutting of the ultra-hard material body not only improves the marking performance, but also enables the marking of a wide width with a small amount of ultra-hard material body. Marks can be engraved more effectively.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a marking device according to an embodiment of the present invention, and FIG. 2 is a front view showing another example of the marking tool shown in FIG. 1. 2...Object to be processed, 3...XY axis moving device, 4...Marking tool, 4A~, 4B...Super hard material body, 7.・・・・・・
・Tool feeding device, 14...Following device, 20...Following head, 23...Detecting device, 26...Comparator, 27... ...Arithmetic circuit, 28...Drive circuit. Applicant Kyojo Citopax Institute Co., Ltd. Representative Patent Attorney Masu 1) Takeo

Claims (1)

[Claims] 1. In a marking device that mechanically stamps a mark on a workpiece, a tool feeding device that feeds the marking tool in the axial direction to maintain the depth of marking with the workpiece at an appropriate value. , an XY-axis moving device that provides relative movement in the XY-axis directions perpendicular to the facing direction between the marking tool and the workpiece so that the marking trajectory matches the mark shape, and a follower having a head that follows the marking processing trajectory A detection device installed in the device and a tracking head to check the state of marking processing on the marking trajectory surface at the tracking position (a detection device that compares the detection signal from the detection device with a reference value to determine A comparator that outputs a signal, an arithmetic circuit that outputs a command signal corresponding to the discrimination signal from the comparator, and when the marking process is poor, the command signal generated by the arithmetic circuit moves the marking tool to the workpiece. and a numerical control device that controls the XY-axis moving device so as to move the marking machining locus in the plane in the XY-axis direction backward relative to the marking tool. 2. The marking tool is Claim 1, characterized in that an ultra-hard material body is placed eccentrically from the rotational axis at the tip, and a mark is engraved by eccentric rotary cutting of the ultra-hard material body. Marking device. 3. The ultra-hard material body is cubic boron nitride (CBN).
3. The marking device according to claim 2, wherein the marking device is made of a sintered body obtained by baking or hardening diamond powder or particles.