JP2021164940A - Marking device, billet manufacturing apparatus, marking method, billet manufacturing method, and billet testing method - Google Patents

Abstract

To provide a marking device capable of inscribing an easy-to-read mark on a marking object, a billet manufacturing apparatus, a marking method, a billet manufacturing method, and a billet testing method.SOLUTION: A marking device 100 of the present disclosure includes: an input part 40 that inputs marking instruction information and member information on a marking object; a control part 30 that controls marking for the marking object; a mark imparting part 10 that imparts a mark onto a surface of the marking object on the basis of the marking instruction information; a mark reading part 20 that reads the imparted mark; and a mark evaluation part 25 that evaluates the mark by checking read mark reading information read against the marking instruction information. When the mark evaluation part 25 determines that the mark is wrong, the mark imparting part 10 re-determines conditions for inscribing the mark on the marking object, on the basis of the member information on the marking object and the result of evaluation of the mark.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to a marking device, a steel piece manufacturing device, a marking method, a steel piece manufacturing method, and a steel piece testing method.

For steel materials, various JIS tests such as tensile test, impact absorption test, bending test, hardness test, wear test, component analysis, etc. are performed to ensure the quality of the product and to confirm that the developed product meets the required specifications. And tissue observation. In order to set test conditions and prevent mistakes in test steel pieces, identification information (product lot number, test piece control number, steel type, product standard, etc.) is written on the surface of the test steel piece in advance in the form of characters or a two-dimensional (2D) code. After marking with, the test piece is processed such as cutting according to the test item. Then, the test steel piece after engraving is conveyed to the next process, and the engraved piece is visually read by a reading device such as a 2D code reader or OCR (Optical Character Recognition), and the test steel piece is managed by automatically collating. There is.

By the way, since the steel pieces have variations in parameters related to the readability of the engraving, such as the presence or absence of surface stains and the adhesion of oxide scale such as black skin material, and the hardness and thickness of the steel pieces vary. The test was sometimes interrupted because the engraved characters and 2D code could not be read by the reader.

In order to improve such a defect, in Patent Document 1, a stamp is stamped on the surface of the dummy steel piece, the stamping depth is confirmed by a laser range finder, and then the pressing force applied to the steel piece is adjusted and stamped. A device for engraving has been proposed.

Japanese Unexamined Patent Publication No. 2013-75298

However, in the apparatus of Patent Document 1, since the marking evaluation by the laser range finder is performed by using the dummy test piece at the time of the initial trial run or the replacement of the hardware parts related to the marking function, the deterioration of the marking pin with time and the dummy test piece are different. It cannot sufficiently handle test steel pieces with different product standards.

The present disclosure has been developed in view of such circumstances, and includes a marking device, a steel piece manufacturing device, a marking method, a steel piece manufacturing method, and a steel piece test method capable of giving an easy-to-read stamp to an object to be stamped. The purpose is to provide.

The marking device of the present disclosure is
An input unit for inputting engraving instruction information and member information of an object to be engraved,
A control unit that controls marking on the marking target,
A stamping unit that stamps the surface of the stamped object based on the stamping instruction information,
An engraving reading unit that reads the given engraving,
It is provided with a stamp evaluation unit that evaluates the stamp by collating the read stamp reading information with the stamp instruction information.
When the marking evaluation unit determines that the marking is negative, the marking addition unit redetermines the marking conditions on the marking target based on the member information of the marking target and the marking evaluation result. It is characterized by that.

In the above-described configuration, when the marking evaluation unit determines that the marking is negative, the marking device of the present disclosure preferably imparts a new marking on the surface of the marking object at a place different from the marking.

In the above-described configuration, the marking device of the present disclosure includes a marking pin and a driving unit that moves the marking pin relative to the marking object along the surface of the marking object. Is preferable.

In the above-described configuration, the marking device of the present disclosure includes a laser head and a driving unit that moves the laser head along the surface of the marking target with respect to the marking target. Is preferable.

In the above-described configuration, the engraving device of the present disclosure uses a trained model in which the control unit learns the relationship between the member information of the engraved object to which the engraved object has been engraved in the past, the engraving condition, and the evaluation result of the engraving. The marking condition used for imparting the marking is determined, and the member information is at least one of the hardness, thickness, and the presence or absence of the oxidation scale of the marking object, and the marking condition is the pressing of the marking pin. It is preferably pressure.

In the marking device of the present disclosure, in the above configuration, the control unit uses a learned model in which the relationship between the member information of the marking object to which the marking has been given in the past, the marking condition, and the evaluation result of the marking is learned. Then, the marking conditions used for imparting the marking are determined, and the marking conditions are determined.
The member information is at least one of the hardness of the object to be engraved, the reflectance to the laser light from the laser head, and the presence or absence of an oxidation scale, and the engraving condition is the output of the laser light and / or the laser head. It is preferable that the moving speed is along the surface of the object to be engraved.

Further, the steel piece manufacturing apparatus of the present disclosure is characterized by including the engraving device according to any one of the above and a cutting portion for cutting the engraved object after marking the engraved object by the engraving device. And.

In addition, the marking method of this disclosure is
The engraving process of engraving the surface of the object to be engraved based on the engraving instruction information,
The engraving reading step of reading the given engraving and
When the marking is determined to be negative in the marking evaluation step and the marking evaluation step of collating the read marking reading information with the marking instruction information to evaluate the marking, the member information of the marking object and the evaluation result of the marking. It is characterized by including a marking condition determination step of redetermining the marking condition on the marking object based on the above.

Further, in the marking method of the present disclosure, in the above configuration, it is preferable to perform marking by pressing the marking pin against the marking object in the marking applying step.

Further, in the marking method of the present disclosure, in the above configuration, it is preferable to perform marking by irradiating the marking target with laser light in the marking applying step.

Further, in the above-described configuration, the marking method of the present disclosure is based on the relationship between the member information of the marking object to which the marking has been given in the past, the marking condition, and the evaluation result of the marking in the marking giving step. The marking condition used for imparting the marking condition is determined, and the member information is at least one of the hardness, thickness, and the presence / absence of the oxidation scale of the marking object, and the marking condition is the pressing force of the marking pin. preferable.

Further, in the above-described configuration, the marking method of the present disclosure is based on the relationship between the member information of the marking object to which the marking has been given in the past, the marking condition, and the evaluation result of the marking in the marking giving step. The marking condition is determined, and the member information is at least one of the hardness of the marking object, the reflectance to the laser light, and the presence or absence of the oxidation scale, and the marking condition is the output of the laser light. And / or the moving speed of the laser beam along the surface of the engraved object is preferable.

Further, in the above-described configuration, when the marking is determined to be negative in the marking evaluation step, the marking method of the present disclosure includes member information of a past marking object including an evaluation result of the last marking, marking conditions, and marking conditions. It is preferable to redetermine the marking conditions used for imparting a new marking based on the relationship with the evaluation result of the marking.

Further, the steel piece manufacturing method of the present disclosure is characterized in that the marking object is cut after the marking is determined to be good by the marking method described in any of the above.

Further, the steel piece test method of the present disclosure is characterized in that the stamped object manufactured by using the steel piece manufacturing method described above is tested.

According to the present disclosure, it is possible to provide an engraving device, a steel piece manufacturing apparatus, an engraving method, a steel piece manufacturing method, and a steel piece test method capable of imparting an easy-to-read engraving to an object to be engraved.

It is a block diagram of the marking device which concerns on 1st Embodiment of this disclosure. It is a block diagram which shows the structure for determining the engraving condition used in the engraving apparatus which concerns on 1st Embodiment of this disclosure. This is a modified example of the configuration for determining the marking conditions used in the marking device according to the first embodiment of the present disclosure. It is a flowchart which shows the implementation procedure of the engraving method which concerns on 1st Embodiment of this disclosure. It is a block diagram of the marking device which concerns on 2nd Embodiment of this disclosure.

Hereinafter, the marking device 100 and the marking method according to the first embodiment of the present disclosure will be described in detail with reference to FIGS. 1 to 4.

Note that FIG. 1 is a block diagram showing a schematic configuration of the engraving device 100 according to the present embodiment, but the engraving portion 10, the camera 21, the lighting 22, the work fixing portion 50, and the steel as the engraving object (work). The piece 60 is drawn in consideration of the actual orientation of each functional unit. That is, the direction perpendicular to the paper surface of FIG. 1 is the X-axis direction of these functional parts. Further, the left-right direction in FIG. 1 is the Y-axis direction of these functional units. Further, the vertical direction in FIG. 1 is the Z-axis direction of these functional units.

The marking device 100 according to the present embodiment includes a marking adding unit 10 that gives a mark (formed by processing) to the steel piece 60, and a marking reading unit 20 that reads the marking given to the steel piece 60 that is the object to be engraved. , The marking evaluation unit 25 that evaluates the marking by collating the read marking reading information with the marking instruction information for instructing the content to be stamped on the surface of the steel piece 60, and the control that controls the marking on the steel piece 60. Section 30, a storage section 35 for storing member information, marking evaluation results, etc., an input section 40 for inputting marking instruction information and member information of the steel piece 60, a work fixing section 50 for fixing the steel piece 60, and steel. It is provided with a transport device (not shown) that transports the piece 60 to the work fixing portion 50.

The engraving device 100 according to the present embodiment, for example, in order to perform identification management on the steel piece 60, the steel piece 60 is provided with characters such as a product lot number, a test piece control number, a model number, and a mark, and a two-dimensional (2D) code. It is a device that stamps on the surface. The marking by the marking device 100 according to the present embodiment is performed, for example, by vibrating the marking pin 11 in the Z-axis direction by air pressure, electromagnetic force, or the like to form dots on the steel piece 60. However, the marking method is not limited to this, and other methods such as laser marking, which will be described later, may be used.

The input unit 40 inputs marking instruction information for instructing the contents to be stamped on the surface of the steel piece 60 and member information of the steel piece 60. The input unit 40 can communicate with the control unit 30 described later (the arrow in FIG. 1 indicates the flow of information by wired communication or wireless communication), and each input information input to the control unit 30 is transmitted to the control unit 30. Will be sent.

The engraving instruction information is, for example, information such as characters such as a product lot number, a test piece control number, a model number, and a mark, and a two-dimensional (2D) code. Further, the marking position on the steel piece 60 can be input from the input unit 40.

The member information of the steel piece 60 is, for example, information such as the hardness of the steel piece 60, the thickness of the steel piece 60, the presence or absence of an oxidation scale on the surface, and the like. Of these member information, the hardness of the steel piece 60 and the thickness of the steel piece 60 are actually measured in advance and input by the operator from the input unit 40, or the product information sent from the manufacturing process is used as the member. It is preferable to enter it as information. Since the allowable range of the hardness (hardness) of the steel piece 60 is determined by the JIS standard or the like depending on the steel grade, it is also possible to create a data table of the steel grade and the standard value and read the hardness from the steel grade. Further, for the oxidation scale, a value read from the product standard may be input, or the presence or absence of black skin may be visually determined, and 1 may be input for the black skin material and 0 for other materials.

The input unit 40 may allow the operator to input the above information from a keyboard, mouse, GUI (Graphical User Interface) or the like, or may use serial communication or the like or LAN (Local Area Network) to input the above information. May be configured to obtain.

The engraving unit 10 imparts engraving to the surface of the steel piece 60 based on the engraving instruction information input from the input unit 40. The engraving section 10 includes a marking pin 11, an XY-axis drive mechanism 12 (drive section) that moves the marking pin 11 relative to the steel piece 60 in the X-axis direction and the Y-axis direction along the surface of the steel piece 60. A Z-axis drive mechanism 13 for moving the marking pin 11 in the Z-axis direction is provided. The marking pin 11 moves the marking pin 11 to the marking position on the steel piece 60 previously input to the input unit 40, and the marking pin 11 stamps a dot on the surface of the steel piece 60 to mark the steel piece 60. A symbol such as a character or a 2D code is formed by a set of engraved dots. By forming dots while moving the marking pin 11 in the X-axis direction and the Y-axis direction using the XY-axis drive mechanism 12, dots are formed at arbitrary positions on the two-dimensional plane, and characters, 2D codes, etc. are formed. Can be formed. The marking pin 11 is pressed and retracted from the steel piece 60 by moving the marking pin 11 in the Z-axis direction using the Z-axis drive mechanism 13. The marking pin 11 can be moved to the marking position by, for example, moving the work fixing portion 50 in the X-axis direction and the Y-axis direction on a coarse-moving XY stage (not shown).

The engraving reading unit 20 performs image processing of an illumination 22 that irradiates the engraved portion 61 of the engraved steel piece 60 with light, a camera 21 that captures an image of the engraved portion 61, and an image captured by the camera 21. It is provided with an image processing unit 23 for performing.

The image of the engraved portion 61 of the steel piece 60 taken by the camera 21 is subjected to image processing such as noise removal and binarization in the image processing unit 23, and engraved reading information as image information is generated. Further, the image after image processing may be decoded according to the code standard to generate engraved reading information such as characters and 2D codes. The read stamp reading information is transmitted to the stamp evaluation unit 25, which will be described later. The image processing unit 23 may be built in the camera 21, or the control unit 30 and the marking evaluation unit 25 described later may have the function of the image processing unit 23.

The engraving evaluation unit 25 compares the image information or the decoded engraving reading information generated by the image processing unit 23 with the engraving instruction information input by the input unit 40. Then, if the stamp reading information matches the stamp instruction information, the stamp evaluation unit 25 determines that the stamp is “good”. Further, if the stamp reading information does not match the stamp instruction information (including the case where the determination cannot be made), the stamp evaluation unit 25 determines the stamp as "No". The marking evaluation unit 25 transmits the marking determination result to the control unit 30.

The control unit 30 is a functional unit that controls the entire marking device 100. The control unit 30 receives the marking instruction information from the input unit 40 and transmits the marking instruction information to the marking giving unit 10, gives the marking evaluation instruction to the marking evaluation unit 25, and outputs the marking evaluation result from the marking evaluation unit 25. I will receive it. If the marking evaluation result received from the marking evaluation unit 25 is "good", the steel piece 60 is carried out from the marking device 100, and if the marking evaluation result is "no", what is the previous marking on the surface of the steel piece 60? The marking unit 10 is instructed to re-engrave at a different position.

Further, the control unit 30 stores the member information such as dimensions and materials including the thickness, the marking conditions such as the pressing force at the time of marking, the marking evaluation result, and the like for all the steel pieces 60 that have been stamped in the past. Can be recorded in. The control unit 30 uses the recorded past member information of the steel piece 60, the pressing force of the marking pin 11, and the marking evaluation result as learning data to generate a learned model 31 for determining marking conditions as shown in FIG. It is stored in the storage unit 35. The learned model 31 for determining the marking condition is a model in which the relationship between the member information of the steel piece 60, the pressing force of the marking pin 11, and the marking evaluation result is machine-learned, and the member information and the marking evaluation result are input. This is a model that outputs the pressing force of the marking pin 11. Examples of the machine learning method include a neural network and the like.

When a neural network is used as a machine learning method, the member information of the steel piece 60 and the marking evaluation result in the training data are input to the neural network to which the initial value is given in advance, and the marking pin 11 which is the output of the neural network 11 Obtain the calculation result of the pressing force of. The parameters of the neural network are repeatedly updated by a well-known error propagation learning method or the like so that the calculation result approaches the pressing force of the marking pin 11 in the training data. The parameter update is repeated until a predetermined condition is satisfied, and a neural network in which the final parameter value is set is obtained as the trained model 31 for determining the marking condition.

The marking evaluation result is not limited to only two stages of "good: 1" and "no: 0". For example, the relative size of the dot diameter measured by the camera 21 with respect to the ideal dot diameter. Can be used as the stamp evaluation result. With such a configuration, the marking evaluation result can be made multi-valued, so that the marking condition can be redetermined more accurately. In this case, for example, when the relative size of the dot diameter is between a predetermined lower limit value and an upper limit value, the marking evaluation result: “good” may be determined in step 7 described later.

Further, the trained model for determining the marking condition is not limited to the configuration shown in FIG. 2, and for example, as shown in FIG. 3, the steel piece 60 for the marking in which the recorded past marking evaluation result was “good”. The trained model 32 for determining the marking condition may be generated by using the member information of the above and the pressing force of the marking pin 11 as training data.

The function of the control unit 30 can be realized as software processing by, for example, executing a predetermined program on a CPU (Central Processing Unit) or a DSP (Digital Signal Processor). However, the present invention is not limited to this aspect, and the function of the control unit 30 is realized as hardware processing by, for example, an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (Field Programmable Gate Array), or the like. It may be configured as. The predetermined program is stored in, for example, a storage unit 35, an external storage device (not shown), or the like.

The storage unit 35 includes a readable storage medium, and the storage medium includes a magnetic disk storage medium, a magnetic cassette, a magnetic tape, other magnetic and optical storage devices (for example, a CD (Compact Disk), a laser disk (registration)). Rewritable and programmable ROM or information such as (trademark), DVD (registered trademark) (Digital Versatile Disc), floppy (registered trademark) disc and Blu-ray disc (registered trademark)), EPROM, EEPROM or flash memory can be stored. Other tangible storage media or combinations thereof are included.

The work fixing portion 50 is a member for fixing the steel piece 60. The work fixing portion 50 may fix the steel piece 60 by a magnet, vacuum suction, or the like, or the steel piece 60 may be sandwiched and fixed by a plurality of members.

The transport device is a device that carries the steel piece 60 to the work fixing portion 50. The transport method is not particularly limited, and automatic transport may be performed using a transport arm, a conveyor, or the like, or manual transport may be performed.

It is also possible to configure a steel piece manufacturing apparatus including a marking device 100 and a cutting portion for cutting the steel piece 60 after marking the steel piece 60 by the marking device 100.

Next, the marking method according to the present embodiment will be described with reference to the flowchart of FIG.

(Step 1: Input of stamp information)
First, the engraving device 100 is activated, and engraving instruction information, member information, and the like are input to the input unit 40. The engraving instruction information includes characters such as a product lot number, a test piece control number, a model number, and a mark, and information such as a two-dimensional (2D) code. Further, the member information includes the steel type, the hardness of the steel piece 60, the dimensions (including the thickness of the steel piece 60), the presence or absence of the oxide scale, and the like. All of these input information may be input manually, or the above information may be received by communication from the production line.

(Step 2: Carrying in steel pieces)
Using the transport device, the steel piece 60 to be stamped is carried into the work fixing portion 50 of the stamping device 100. As a method for carrying in the steel pieces 60, a plurality of steel pieces 60 may be carried in in sequence, and the steps from step 3 to step 7 described later may be continuously performed. Further, the next steel piece 60 may be carried in after the steps 3 to 7 are completed for one steel piece 60. After carrying in, the steel piece 60 is fixed using the work fixing portion 50.

(Step 3: Setting engraving conditions)
In the present embodiment, the marking condition is the pressing force of the marking pin 11. The control unit 30 determines the marking position on the steel piece 60 and the pressing force of the marking pin 11 at the time of marking, and transmits the marking position to the marking fixing unit 10. The pressing force of the marking pin 11 may be a predetermined value set in advance, but the past member information of the steel piece 60 recorded in the control unit 30, the marking condition, and the evaluation result of the marking are machine-learned as learning data. Further, it is preferable to determine the optimum value of the pressing force of the marking pin 11 with respect to the member information input in step 1 by using the trained model 31 for determining the marking condition. Alternatively, among the past markings recorded in the control unit 30, for the markings whose determination result is "good", the trained model 32 for determining the marking conditions is machine-learned using the member information and the marking conditions as teacher data. It may be used to determine the optimum value of the pressing force of the marking pin 11 with respect to the member information input in step 1.

(Step 4: Engraving)
The surface of the steel piece 60 is marked according to the marking instruction received from the control unit 30.

(Step 5: Movement of steel pieces)
After engraving, the steel piece 60 is released from being fixed, the engraved portion 61 is moved directly under the engraved reading unit 20, and the steel piece 60 is fixed.

(Step 6: Reading the engraving)
The image of the engraving unit 61 is taken by the camera 21, the obtained image is image-processed by the image processing unit 23, and then the image is converted into a character or a 2D code as necessary to acquire the engraving reading information. If the engraving cannot be read, such as when the characters or 2D code cannot be decoded, the process proceeds to step 8 described later, the engraving conditions are redetermined, and then steps 3 and subsequent steps are executed again.

(Step 7: Stamp evaluation)
The stamp reading information generated by the image processing unit 23 is transmitted to the stamp evaluation unit 25 and collated with the stamp instruction information received from the input unit 40. When the stamp reading information and the stamp instruction information match, the stamp evaluation unit 25 determines that the stamp is “good”, and if they do not match, determines that the stamp is “no”. The marking evaluation unit 25 transmits the marking determination result to the control unit 30. When the determination result is "good", the control unit 30 carries out the steel piece 60 by the transport device, carries in the next steel piece 60, or ends the marking. If the determination result is "No", the process proceeds to step 8 described later, the marking conditions are redetermined, and then steps 3 and subsequent steps are executed again.

(Step 8: Redetermination of engraving conditions)
The control unit 30 determines the marking conditions again, and repeats steps 3 to 7 until the marking determination result is “good”. Here, the marking position on the steel piece 60 is preferably a position different from the previous marking position. Further, the pressing force of the marking pin 11 has been learned for determining the marking condition obtained by adding the member information, the marking condition and the marking determination result in the marking performed immediately before to the teacher data and performing machine learning again. It is preferable to determine using the model 31.

In step 7, for the purpose of improving the quality of the engraving on the steel piece 60 whose engraving is determined to be "good", for example, the surface position to be engraved is ground to obtain dirt or foreign matter on the surface. May be removed in advance. Further, a paint may be sprayed on the engraved portion 61 to give a contrast between the engraved portion 61 and the peripheral portion. Further, any value can be specified for the number of times of re-engraving the same steel piece 60.

Further, in step 7, a steel piece manufacturing method including further step of cutting the steel piece 60 with respect to the steel piece 60 whose engraving is determined to be “good” can be carried out.

It is also possible to carry out a steel piece test method in which a test is performed on a steel piece 60 manufactured by using the above-mentioned steel piece manufacturing method.

As described above, the marking device 100 according to the present embodiment includes an input unit 40 for inputting marking instruction information and member information of the marking target, a control unit 30 for controlling marking on the marking target, and marking. The marking giving unit 10 that gives a marking to the surface of the object to be stamped based on the instruction information, the marking reading unit 20 that reads the given marking, and the stamp reading information that has been read are collated with the marking instruction information to evaluate the marking. A marking evaluation unit 25 is provided, and when the marking evaluation unit 25 determines that the marking is not possible, the marking giving unit 10 determines the marking condition on the marking target based on the member information of the marking target and the marking evaluation result. Was configured to be re-determined. By adopting such a configuration, even if the marking pin 11 deteriorates with time or the object to be engraved has a shape and material different from that of the dummy test piece, the engraving conditions are optimized according to the object to be engraved. be able to. Therefore, it is possible to give an easy-to-read stamp to the stamped object.

Further, in the present embodiment, when the marking evaluation unit 25 determines that the marking is not possible, a new marking is given to a place different from the marking on the surface of the marking object. By adopting such a configuration, a new marking can be optimized without being affected by the previous marking.

Further, in the present embodiment, the marking giving portion 10 is configured to have a marking pin 11 and a driving portion for moving the marking pin 11 relative to the marking target along the surface of the marking target. By adopting such a configuration, it is possible to make a mark on the surface of the steel piece 60 or the like with a simple configuration using the marking pin 11.

Further, in the present embodiment, the control unit 30 uses a learned model in which the relationship between the member information of the engraved object to which the engraved object has been engraved in the past, the engraving condition, and the evaluation result of the engraving is learned, and the engraving is performed. The marking condition used for applying was determined, and the member information was at least one of the hardness, thickness, and the presence / absence of the oxidation scale of the marking object, and the marking condition was configured to be the pressing force of the marking pin 11. By adopting such a configuration, when the marking pin 11 is used for the marking portion 10, the marking condition is determined by machine learning using the evaluation results in the past marking, so that the quality of marking can be improved. ..

Further, the steel piece manufacturing apparatus according to the present embodiment is configured to include any of the above-mentioned engraving devices 100 and a cutting portion for cutting the engraved object after marking the engraved object by the engraving device 100. bottom. By adopting such a configuration, cutting is performed immediately after marking the steel piece 60 to enable individual identification, so that it is not necessary to set the steel piece 60 for cutting again, and test efficiency and production Efficiency can be improved.

Further, the marking method according to the present embodiment includes a marking giving step of giving a marking to the surface of the marking object based on the marking instruction information, a marking reading step of reading the given marking, and a marking instruction of reading the stamp reading information. In the stamp evaluation process that evaluates the stamp by collating with the information, and when it is determined that the stamp is not stamped in the stamp evaluation process, the marking conditions on the stamped object are determined based on the member information of the stamped object and the stamped evaluation result. It is configured to include a step of determining the marking condition to be redetermined. By adopting such a configuration, even if the marking pin 11 deteriorates with time or the object to be engraved has a shape and material different from that of the dummy test piece, the engraving conditions are optimized according to the object to be engraved. be able to. Therefore, it is possible to give an easy-to-read stamp to the stamped object.

Further, in the present embodiment, in the marking applying step, the marking pin 11 is pressed against the marking object to make a marking. By adopting such a configuration, it is possible to make a mark on the surface of the steel piece 60 or the like with a simple configuration using the marking pin 11.

Further, in the present embodiment, in the engraving process, the engraving condition used for engraving is determined based on the relationship between the member information of the engraved object to which the engraving has been applied in the past, the engraving condition, and the evaluation result of the engraving. death,
The member information is at least one of the hardness and thickness of the object to be engraved and the presence or absence of an oxidation scale, and the engraving condition is configured to be the pressing force of the marking pin 11. By adopting such a configuration, when the marking pin 11 is used for the marking portion 10, the marking condition is determined based on the evaluation result in the past marking, so that the quality of marking can be improved.

Further, in the present embodiment, when it is determined in the marking evaluation process that the marking is rejected, the relationship between the member information of the marking object in the past including the evaluation result of the last marking, the marking condition, and the evaluation result of the marking is obtained. Based on this, it was configured to redetermine the marking conditions used to give a new marking. By adopting such a configuration, a new marking condition is redetermined in consideration of the member information and the marking condition in the marking for which the marking evaluation is rejected. Therefore, when the marking pin 11 or the like of the marking giving portion 10 deteriorates with time. Etc., the appropriate engraving conditions in which they are taken into account can be redetermined.

Further, the steel piece manufacturing method according to the present embodiment is configured to cut the object to be engraved after the engraving is determined to be good by any of the above engraving methods. By adopting such a configuration, the steel piece 60 is cut immediately after the steel piece 60 is marked with a good evaluation result so that the individual can be identified. Therefore, the steel piece 60 is set again for cutting. There is no need, and test efficiency and production efficiency can be improved.

Further, the steel piece test method according to the present embodiment is configured to test an engraved object manufactured by using the above-mentioned steel piece manufacturing method. By adopting such a configuration, since the test is performed immediately after the individual pieces are cut by cutting, it is not necessary to set the individual pieces again for the test, and the test efficiency and the production efficiency can be improved.

Next, with reference to FIG. 5 and the like, the marking device 200 according to the second embodiment of the present disclosure will be described in detail.

The marking device 200 according to the present embodiment includes a marking adding unit 10 that gives a marking (formed by processing) to the steel piece 60, and a marking reading unit 20 that reads the marking given to the steel piece 60 that is the object to be engraved. , The marking evaluation unit 25 that evaluates the marking by collating the read marking reading information with the marking instruction information, the control unit 30 that controls the marking on the steel piece 60, and the storage that stores the member information, the marking evaluation result, and the like. A part 35, an input part 40 for inputting marking instruction information for instructing the contents to be stamped on the surface of the steel piece 60, and member information of the steel piece 60, a work fixing part 50 for fixing the steel piece 60, and steel. It is provided with a transport device (not shown) that transports the piece 60 to the work fixing portion 50.

The engraving device 200 according to the present embodiment, for example, in order to perform identification management on the steel piece 60, the steel piece 60 is provided with characters such as a product lot number, a test piece control number, a model number, and a mark, and a two-dimensional (2D) code. It is a device that stamps on the surface. The marking by the marking device 200 according to the present embodiment is performed by irradiating the surface of the steel piece 60 with the laser light from the laser head 111.

The engraving unit 10 imparts engraving to the surface of the steel piece 60 based on the engraving instruction information input from the input unit 40. The engraving unit 10 includes a laser head 111 having a built-in gas laser, a laser driving unit 114 that controls the current flowing through the laser, a gas supply unit 115 that supplies gas to the gas laser oscillator, and a laser head 111. An XY-axis drive mechanism 112 (drive unit) that moves relative to the steel piece 60 in the X-axis direction and the Y-axis direction along the surface of the steel piece 60, and a Z-axis drive mechanism 113 that moves the laser head 111 in the Z-axis direction. And have. As the gas laser, for example, a carbon dioxide gas laser can be used. The engraving unit 10 moves the laser head 111 to the engraving position on the steel piece 60 previously input to the input unit 40, and irradiates the surface of the steel piece 60 with laser light from the laser head 111 to form dots. And engrave. A symbol such as a character or a 2D code is formed by a set of engraved dots. By forming dots while moving the laser head 111 in the X-axis direction and the Y-axis direction using the XY-axis drive mechanism 112, dots can be formed at arbitrary positions on the steel piece 60. The distance between the laser head 111 and the steel piece 60 is adjusted by moving the laser head 111 in the Z-axis direction using the Z-axis drive mechanism 113 so that the laser beam is focused on the surface of the steel piece 60. .. The laser head 111 can be moved to the marking position by, for example, moving the work fixing portion 50 in the X-axis direction and the Y-axis direction on a coarse-moving XY stage (not shown).

In the present embodiment, the member information of the steel piece 60 is, for example, information such as the hardness of the steel piece 60, the reflectance of the steel piece 60 with respect to the laser light from the laser head 111, the presence or absence of an oxidation scale on the surface, and the like. Of these member information, the hardness of the steel piece 60 is actually measured in advance and input by the operator from the input unit 40, or the product information sent from the manufacturing process is transmitted to the input unit 40 as member information. It is preferable to do so. Since the allowable range of the hardness of the steel piece 60 is determined by the JIS standard or the like depending on the steel grade, it is also possible to create a data table of the steel grade and the standard value and read the hardness from the steel grade. The reflectance for the laser beam may be measured by the operator irradiating the steel piece 60 with the laser beam and input, or a data table in which the reflectance is measured for each steel type is created in advance and the input unit 40 It may be sent to. Further, for the oxidation scale, a value read from the product standard may be input, or the presence or absence of black skin may be visually determined, and 1 may be input for the black skin material and 0 for other materials.

In the present embodiment, the marking conditions are the output of the laser beam from the laser head 111, the moving speed of the laser head 111 along the surface of the marking object, and the like. This is because the higher the output of the laser beam and the lower the moving speed of the laser head 111, the higher the power density on the surface of the steel piece 60.

As described above, in the marking device 200 and the marking method according to the present embodiment, the marking pin 11 in the first embodiment is replaced with the laser head 111, and the member information and the marking conditions are replaced with the above-mentioned items corresponding to laser processing. Is similar to the configuration of the first embodiment, and therefore further description thereof will be omitted here.

As described above, in the present embodiment, the engraving unit 10 has a laser head 111 and a driving unit that moves the laser head 111 relative to the engraved object along the surface of the engraved object. It was configured in. By adopting such a configuration, it is possible to suppress the deterioration of the marking portion 10 with time and stably apply the marking to the surface of the steel piece 60 as compared with the case where the marking pin 11 is used.

Further, in the present embodiment, the control unit 30 uses a learned model in which the relationship between the member information of the engraved object to which the engraved object has been engraved in the past, the engraving condition, and the evaluation result of the engraving is learned, and the engraving is performed. The marking condition to be used is determined, and the member information is at least one of the hardness of the marking object, the reflectance to the laser light from the laser head 111, and the presence or absence of the oxidation scale, and the marking condition is the output of the laser light and the presence or absence of the oxidation scale. / Or the laser head 111 was configured to have a moving speed along the surface of the object to be engraved. By adopting such a configuration, when the laser head 111 is used for the engraving unit 10, the engraving condition is determined by machine learning using the evaluation results in the past engraving, so that the engraving quality can be improved. ..

Further, in the present embodiment, in the marking applying step, the marking is made by irradiating the marking target with a laser beam. By adopting such a configuration, it is possible to suppress the deterioration of the marking portion 10 with time and stably apply the marking to the surface of the steel piece 60 as compared with the case where the marking pin 11 is used.

Further, in the present embodiment, in the engraving process, the engraving condition used for engraving is determined based on the relationship between the member information of the engraved object to which the engraving has been applied in the past, the engraving condition, and the evaluation result of the engraving. However, the member information is at least one of the hardness of the object to be engraved, the reflectance to the laser beam, and the presence or absence of the oxidation scale, and the engraving condition is along the output of the laser beam and / or the surface of the object to be engraved with the laser beam. It was configured to be a moving speed. By adopting such a configuration, when the laser beam is used for the marking unit 10, the marking condition is determined based on the evaluation result in the past marking, so that the quality of the marking can be improved.

Although the present disclosure has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and modifications based on the present disclosure. Therefore, it should be noted that these modifications and modifications are included in the scope of the present invention. For example, the functions included in each component can be rearranged so as not to be logically inconsistent, and a plurality of components can be combined or divided into one. It should be understood that these are also included in the scope of the present invention.

For example, in the first and second embodiments, the case where the steel piece 60 is used as the marking object has been described, but the present invention is not limited to this embodiment. The object to be engraved may be a metal piece other than the steel piece 60, or may be a material other than the metal.

Further, in the first and second embodiments, the marking pin 11 or the laser head 111 is configured to be used as the means for imparting the marking, but the present invention is not limited to this embodiment, and for example, the marking is performed by etching or the like. It may be configured as. In that case, the etching time, the concentration of the etching solution, and the like may be used as the marking conditions.

Further, in the first and second embodiments, the marking pin 11 or the laser head 111 is driven by the XY-axis drive mechanisms 12, 112 (drive unit), and moves relative to the steel piece 60 in the X-axis direction and the Y-axis direction. However, the present invention is not limited to this aspect. Instead of driving the marking pin 11 or the laser head 111, the work fixing portion 50 is driven in the X-axis direction and the Y-axis direction, so that the marking pin 11 or the laser head 111 is driven in the X-axis direction and the Y-axis direction with respect to the steel piece 60. It may be configured to move relative to the axial direction.

10 Engraving part 11 Marking pin 12 XY axis drive mechanism (drive part)
13 Z-axis drive mechanism 20 Engraving reading unit 21 Camera 22 Lighting 23 Image processing unit 25 Engraving evaluation unit 30 Control unit 31 Learning model for engraving condition determination 32 Learning model for engraving condition determination 35 Storage unit 40 Input unit 50 Work fixing unit 60 Steel piece 61 Engraving part 100 Engraving device 111 Laser head 112 XY axis drive mechanism (drive part)
113 Z-axis drive mechanism 114 Laser drive unit 115 Gas supply unit 200 Engraving device

Claims (15)

An input unit for inputting engraving instruction information and member information of an object to be engraved,
A control unit that controls marking on the marking target,
A stamping unit that stamps the surface of the stamped object based on the stamping instruction information,
An engraving reading unit that reads the given engraving,
It is provided with a stamp evaluation unit that evaluates the stamp by collating the read stamp reading information with the stamp instruction information.
When the marking evaluation unit determines that the marking is negative, the marking addition unit redetermines the marking conditions on the marking target based on the member information of the marking target and the marking evaluation result. Engraving device. The marking device according to claim 1, wherein when the marking evaluation unit determines that the marking is negative, a new marking is given on the surface of the marking object at a place different from the marking. The marking device according to claim 1 or 2, wherein the marking addition unit includes a marking pin and a driving unit that moves the marking pin relative to the marking object along the surface of the marking object. The marking device according to claim 1 or 2, wherein the marking addition unit includes a laser head and a driving unit that moves the laser head along the surface of the marking object relative to the marking object. .. The control unit uses a learned model that has learned the relationship between the member information of the marking object to which the marking has been given in the past, the marking condition, and the evaluation result of the marking, and determines the marking condition used for giving the marking. Decide and
The marking device according to claim 3, wherein the member information is at least one of the hardness, thickness, and presence / absence of an oxidation scale of the marking object, and the marking condition is a pressing force of the marking pin. The control unit uses a learned model that has learned the relationship between the member information of the marking object to which the marking has been given in the past, the marking condition, and the evaluation result of the marking, and determines the marking condition used for giving the marking. Decide and
The member information is at least one of the hardness of the object to be engraved, the reflectance to the laser light from the laser head, and the presence or absence of an oxidation scale, and the engraving condition is the output of the laser light and / or the laser head. The marking device according to claim 4, wherein the moving speed is along the surface of the marking object. A steel piece manufacturing apparatus comprising the marking device according to any one of claims 1 to 6 and a cutting portion for cutting the marking object after marking the marking object by the marking device. The engraving process of engraving the surface of the object to be engraved based on the engraving instruction information,
The engraving reading step of reading the given engraving and
When the marking is determined to be negative in the marking evaluation step and the marking evaluation step of collating the read marking reading information with the marking instruction information to evaluate the marking, the member information of the marking object and the evaluation result of the marking. A marking method including a marking condition determination step of redetermining the marking conditions on the marking object based on the above. The marking method according to claim 8, wherein in the marking applying step, a marking pin is pressed against the marking object to make a marking. The engraving method according to claim 8, wherein in the engraving step, the engraving object is engraved by irradiating the object to be engraved with a laser beam. In the engraving step, the engraving condition to be used for engraving is determined based on the relationship between the member information of the engraved object to which the engraving has been applied in the past, the engraving condition, and the evaluation result of the engraving.
The marking method according to claim 9, wherein the member information is at least one of the hardness, thickness, and presence / absence of an oxidation scale of the marking object, and the marking condition is a pressing force of a marking pin. In the engraving step, the engraving condition to be used for engraving is determined based on the relationship between the member information of the engraved object to which the engraving has been applied in the past, the engraving condition, and the evaluation result of the engraving.
The member information is at least one of the hardness of the object to be engraved, the reflectance to the laser light, and the presence or absence of an oxidation scale, and the engraving condition is the output of the laser light and / or the engraving target of the laser light. The marking method according to claim 10, which is a moving speed along the surface of an object. When it is determined that the marking is negative in the marking evaluation step, a new marking is made based on the relationship between the member information of the marking object in the past including the evaluation result of the last marking, the marking condition, and the evaluation result of the marking. The marking method according to any one of claims 8 to 12, wherein the marking conditions used for imparting the marking are determined again. A steel piece manufacturing method for cutting an object to be engraved after the engraving is determined to be good by the engraving method according to any one of claims 8 to 13. A steel piece test method for testing the engraved object manufactured by using the steel piece manufacturing method according to claim 14.

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