TWI785746B - Thermal image auxiliary processing device and method thereof - Google Patents

Abstract

A thermal image auxiliary processing method includes the following steps. A reference part is prepared. A reference positioning point or a reference positioning surface is established with the reference part. A cutting tool or a polishing tool is positioned with the reference positioning point or the reference positioning surface. According to a thermal image, a determined positioning point or a determined positioning surface is obtained. Through the above method, the present invention can be used for auxiliary positioning and wearing measurement of the cutting tool or the polishing tool, as well as for measuring the size, the angle or flatness of an object to be measured. Therefore, the present invention can avoid the problems of increased equipment downtime and realign errors caused by manual and visual measurement.

Description

Thermal image auxiliary processing device and method thereof

The present invention relates to a processing method, and in particular to a thermal image auxiliary processing device and a method thereof.

Generally speaking, tool positioning and wear detection during machine tool processing are mostly carried out manually and visually. However, measuring and setting the cutting length of the tool, the size of the workpiece and the initial contact with the blank surface in this way will cause The downtime of equipment idling increases with visual error. In addition, the removed tool and workpiece are measured outside the machine. Due to the locking error, the length and position of the installed tool need to be re-calibrated. In addition, if optical image recognition and measurement are used, since optical image recognition is easily affected by environmental factors such as light sources and surface materials, and requires high-resolution cameras, the requirements for image processing equipment, cost, and technology are relatively high. higher.

The invention relates to a thermal image auxiliary processing method, which is used for auxiliary positioning, wear detection, and measurement of the size, angle or flatness of a tool or grinding tool before and after processing.

According to one aspect of the present invention, a thermal image auxiliary processing method is proposed, which includes the following steps. Prepare a reference part. A reference positioning point or a reference positioning plane is established with the reference component. A tool or grinding tool to be tested is positioned by the reference positioning point or the reference positioning surface. According to a thermal image, a determined position or a determined plane is obtained.

According to one aspect of the present invention, a thermal image auxiliary processing device is provided for positioning or measuring an object under test. The thermal image auxiliary processing device includes a thermal image sensing module and a processing unit. The thermal image sensing module synchronously monitors the thermal temperature rise of the object under test. The processing unit includes a controller. When the processing unit detects at least one hot spot of temperature rise of the object under test according to the thermal image, the controller performs mechanical coordinate conversion to obtain at least one position coordinate information.

In order to have a better understanding of the above-mentioned and other aspects of the present invention, the following specific examples are given below, and the accompanying drawings are described in detail as follows:

100: machine tools

102:Multi-axis servo drive motor

103: Blank material (or workpiece to be processed)

104: Knife

105: Dresser

106: Abrasives

107: Reference anchor point (surface)

108: Expected processing position

108': actual processing position

109: Cutting position of reference knife

110: Thermal image auxiliary processing device

111: grinding wheel

112: Processing unit

113: Controller

114: input unit

116: Thermal image sensing module

117: Precise grinding surface (measured plane)

121: Reference knife

122,123: Processing knife

MG: thermal image

d: Tolerance

H1, H2, H3: Hot spots of temperature rise

Figure 1A shows a schematic diagram of a thermal image auxiliary processing device according to an embodiment of the present invention; Figures 1B and 1C respectively illustrate a flow chart of a thermal image auxiliary processing method according to an embodiment of the present invention; Figure 2 shows respectively A flowchart of a thermal image-assisted processing method for tool positioning and wear detection according to an embodiment of the present invention; Figures 3A and 3B illustrate the thermal image-assisted processing method for tool (such as turning tool) positioning in Figure 2 An example operation diagram of .

FIGS. 4A to 4D respectively illustrate two exemplary operation diagrams of the thermal image-aided processing method for wear detection of a tool (such as a turning tool) in FIG. 2 .

Figures 5A and 5B show another example operation diagram of the thermal image-assisted machining method used for tool (such as drill bit or milling cutter) positioning in Figure 2; Figures 6A to 6D illustrate the tool used in Figure 2 respectively Another example operation diagram of the thermal image-assisted processing method for wear detection (such as milling cutter).

FIGS. 7A to 7D are respectively another two example operation diagrams of the thermal image-aided processing method for wear detection of a tool (such as a drill bit or a milling cutter) in FIG. 2 .

Figure 8 shows a flow chart of a thermal image-assisted processing method for abrasive tool (such as grinding wheel) positioning and wear measurement according to an embodiment of the present invention; An example operation diagram of a thermal image-assisted machining method for tool (eg, grinding wheel) positioning.

FIGS. 10A and 10B illustrate another exemplary operation of the thermal image-assisted processing method for positioning abrasive tools (eg, polygonal grinding wheels) in FIG. 8 .

FIGS. 11A and 11B illustrate an example operation diagram of the thermal image-assisted processing method for wear measurement of abrasive tools (such as grinding wheels) in FIG. 8 .

FIG. 12A and FIG. 12B show two example operation diagrams of the thermal image-assisted processing method for angle measurement and plane measurement, respectively.

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will illustrate The concepts of the example embodiments are fully conveyed to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Furthermore, the drawings are merely schematic illustrations of the invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus repeated descriptions thereof will be omitted. Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices these functional entities.

It should be noted that, in the case of no conflict, the embodiments of the present invention and features in different embodiments can be combined with each other.

Figure 1A shows a schematic diagram of a thermal imaging auxiliary processing device 110 for positioning and wear measurement of a tool 104 or a grinding tool 106 according to an embodiment of the present invention, and Figures 1B and 1C respectively illustrate a thermal image processing device according to an embodiment of the present invention Flowchart of the thermal image-assisted processing method. In this embodiment, the thermal image auxiliary processing device 110 can be used for a machine tool 100, and the machine tool 100 includes a computer numerical control (CNC) machine tool such as a lathe, a milling machine, a drilling machine or a grinder, and is used for processing a blank (or to be processed) Parts) 103 for processing such as cutting, milling, drilling or grinding. The user can input instructions to the multi-axis servo drive motor 102 of the machine tool 100 through the controller 113 to drive the cutter 104 or the grinding tool 106 to move and process the blank 103 fixed on the machine table to complete a processed product . Before or after the blank 103 is processed, the user can also input instructions to the multi-axis servo drive motor 102 of the machine tool 100 through the controller 113 to drive the reference knife to move and adjust the blank fixed on the machine table. 103 Perform positioning and tolerance measurement to ensure that the tolerance of the finished product after processing is within the allowable tolerance range. Or, before the grinding tool 106 grinds the blank 103, the user can use the tip of the trimmer 105 as a reference point to trim the grinding surface, and wait until the grinding tool 106 grinds the blank 103 for a period of time, and then the grinding tool 106 is finished by the trimmer 105. Precise trimming and wear detection of the abrasive tool 106 to ensure that the tolerance of the finished product after processing is within the allowable tolerance range.

Please refer to FIG. 1A, the thermal image auxiliary processing device 110 is used for auxiliary positioning of the tool 104 or grinding tool 106 before and after processing and measurement of the size, angle or flatness of the object to be measured (such as the blank 103), The auxiliary thermal image processing device 110 includes a thermal image sensing module 116 and a processing unit 112 . The processing unit 112 includes a controller 113 and an input unit 114 for inputting commands, such as a computer. The thermal image sensing module 116 uses a thermal image (such as an infrared image) to simultaneously monitor the thermal temperature rise when the blank is in contact with the tool, and the processing unit 112 can judge a temperature rise hot spot H1 according to the thermal image MG. To calculate the size, angle, and flatness of the object to be measured, or determine whether the tool 104 is in contact with the blank 103 .

Please refer to the positioning measurement process in Figure 1B. First, in step S11, prepare a reference component, such as a reference knife or trimmer. In step S12, establish a reference positioning point (surface) with the reference component. In step S13 , the processing tool (grinding tool) to be measured is positioned with the reference positioning point (surface), and then, in step S14, the measured position (surface) is obtained according to whether there is a temperature rise hot spot in the thermal image. In this way, the positioning measurement of the processing tool (grinding tool) is completed, so as to facilitate subsequent mass production processing.

Please refer to the wear detection process in Figure 1C. First, in step S15, the measured position (surface) is established with the reference component. In step S16, the measured position (surface) is established. And carry out tracking offset cutting according to the specified processing instructions. In step S17, according to whether there are temperature rise hot spots in the thermal image, it is judged whether the size of the workpiece to be processed meets the tolerance standard. If it does not meet the standard, proceed to step S18 to adjust the wear value. And the workpiece to be processed is reprocessed or corrected. If it meets the standard, continue to the next mass production process.

The following is a detailed description of the thermal image-assisted processing method in different embodiments, wherein Figure 2 shows a flow chart of a thermal image-assisted processing method for tool 104 positioning and wear detection according to an embodiment of the present invention; Figures 3A and 3B The figure shows an example operation diagram of the thermal image-assisted processing method for positioning the tool 104 (such as a turning tool) in FIG. Two example operation diagrams of the thermal image-assisted processing method for wear detection; FIGS. 5A and 5B illustrate another exemplary operation diagram of the thermal image-assisted processing method for positioning the tool 104 (such as a drill bit or a milling cutter) in FIG. 2; Figures 6A to 6D show another example operation diagram of the thermal image-assisted processing method used in the wear detection of the tool 104 (such as a milling cutter) in Figure 2; Still another two example operation diagrams of the thermal image-assisted processing method for wear detection of a tool 104 (such as a drill bit or a milling cutter); FIG. 8 respectively depicts positioning and wear detection for a grinding tool 106 (such as a grinding wheel) according to an embodiment of the present invention A flow chart of the thermal image-assisted processing method; Figures 9A and 9B show an example operation diagram of the thermal image-assisted processing method for abrasive tool 106 (such as a grinding wheel) positioning in Figure 8; Figures 10A and 10B show Another example operation diagram of the thermal image-assisted processing method for positioning the abrasive tool 106 (such as a polygonal grinding wheel) in Fig. 8; Figs. 11A and 11B illustrate wear detection of the abrasive tool 106 (such as a grinding wheel) in Fig. 8 An example operation diagram of the thermal image-assisted processing method of ; No. 12A 12B and 12B respectively depict two example operation diagrams of the thermal image-assisted processing method for angle measurement and plane measurement.

Please refer to Figures 2, 3A and 3B together. First, in step S21, the reference knife 121 is positioned. Step S22 , cutting a blank 103 with the reference knife 121 to establish a reference positioning point (surface) 107 , wherein the coordinates of the tip of the reference knife 120 are known. In step S23 , a machining knife 122 is used to approach the blank 103 in a circular manner, and the cutting stroke is continued, but the blank 103 has not been touched yet. In step S24, the thermal image sensing module 106 is used to synchronously monitor whether there is a thermal temperature rise. If the temperature rise hot spot H1 is detected, it means that the machining knife 122 has just touched the blank 103, that is, it has reached the reference positioning point (surface) 107. In step S25, the controller 113 performs mechanical coordinate conversion to complete the machining knife. 122 Positioning (that is, obtaining the coordinates of the determined positions). If no temperature rise hot spot H1 is detected, go back to step S23 and keep approaching the blank 103 . The so-called conversion of mechanical coordinates means that the controller 113 calculates the position or coordinates that the machining tool 122 reaches after multiple cycles of cutting.

Please refer to Fig. 3A, the coordinate position of the tool tip of the above-mentioned reference knife 121 is known, and after the reference knife 121 is positioned, it does not participate in the subsequent mass production cutting, it is only used for positioning, and can be used almost without wear. Long-term use does not need to go through the process of positioning the reference knife 121 every time. In addition, when the reference knife 121 cuts the blank 103 , the processing unit 112 in FIG. 1 can determine the position and size of the blank 103 through numerical analysis.

Please refer to FIG. 3B , the coordinate position of the tool nose of the above-mentioned machining tool 122 is unknown, so the position of the reference positioning point (surface) 107 is first established by the reference tool 121 . Next, the machining knife 122 approaches the blank 103 in a circular manner until it just touches the blank 103 to produce cutting (for example, 1 μm cutting thickness or greater, depending on the precision of the knife feeding mechanism). At this time, the thermal image The temperature rise hotspot H1 generated when the machining knife 122 cuts the blank 103 is displayed in the MG in real time, so that the controller 113 of the processing unit 112 performs the mechanical coordinate conversion 122 on the tool tip coordinates. For example, the tool tip coordinates of the machining tool 122 are approximately equal to the reference positioning point (surface) 107 established by the reference tool 121 minus the distance from the processing tool 122 in the same direction approaching the reference positioning point (surface) 107 successively. The minimum approach distance is determined by the minimum feed machining accuracy of the machine tool 100 (which may be 1 μm or greater), but the present invention is not limited thereto.

After the above-mentioned positioning of the machining knife 122 is completed, the wear detection of the machining knife 122 can be further performed. Please refer to Figure 2. First, in step S26, the machining knife 122 starts mass-production cutting. At this time, the machining knife 122 continues to wear a small amount to reduce the length, so that the machining knife 122 has a wear amount after cutting (that is, the initial size of the machining knife 122 minus the cutting length. remaining size). Step S27 , after the mass-production cutting is completed, the reference tool 121 repeats the last machining command of the machining tool 122 to perform the tracking offset cutting stroke. For example, the reference knife 121 moves along the blank 103 and is offset by a tolerance or a predetermined deviation value relative to the cutting surface of the blank 103 . Step S28, synchronously monitor whether there is a temperature rise hot spot H1 on the cutting surface from the thermal image MG. If the temperature rise hot spot H1 is monitored, in step S29, it is judged that the wear amount of the machining knife 122 is greater than the tolerance (or predetermined deviation value), indicating that the dimensional tolerance of the blank 103 is greater than the deviation value, and the wear value needs to be adjusted (as shown in Figure 1C. Step S18), to reprocess or modify the blank 103 (back to step S26). If no temperature rise hot spot H1 is detected, it is judged that the wear amount of the machining tool 122 is less than the tolerance (or predetermined deviation value), then return to step S26, and continue the next round of mass production cutting. The tolerance is, for example, the difference allowed by the processing personnel to the finished size of the qualified blank 103 .

Please refer to Figures 4A and 4B together, which illustrate an embodiment in which the wear amount of the machining knife 122 is smaller than the tolerance d. In this embodiment, the machining knife 122 wears out gradually after multiple cycles of machining, so that the actual cutting amount of the machining knife 122 is gradually smaller than the expected cutting amount. Whether the amount of wear is within the allowable tolerance range (it can be 1 μm or more). As shown in Figure 4A, when the amount of wear of the machining knife 122 is still small, the machining knife 122 cuts at the expected machining position 108, and then, as shown in Figure 4B, the reference knife 121 repeats the final machining command of the machining knife 122 at The blank 103 moves on the track and deviates outward by a tolerance d, so the cutting position 109 of the reference knife 121 deviates from the expected processing position 108 , so it will not touch the surface of the blank 103 . At this time, there is no thermal temperature rise, so the thermal image MG does not show the temperature rise hot spot H1 of cutting, indicating that the wear amount of the machining tool 122 is less than the tolerance d.

Please refer to Figures 4C and 4D together, which illustrate an embodiment in which the wear amount of the machining knife 122 is greater than the tolerance d. As shown in Figure 4C, when the wear of the machining knife 122 is too large, the machining knife 122 does not cut at the expected machining position 108, so that the actual machining position 108' deviates from the expected machining position 108 (greater than or equal to the tolerance d), and then, As shown in Figure 4D, the reference knife 121 repeats the last machining command of the machining knife 122 to track and move on the blank 103 and shift outward by a tolerance d, but because the cutting amount of the machining knife 122 is insufficient, the reference knife 121 still remains will contact the surface of the billet 103, and the temperature rise hot spot H1 is displayed in the thermal image MG, indicating that the wear amount of the machining knife 122 is greater than the tolerance d.

From the above description, it can be known that when the thermal image MG shows the hot spot H1 of temperature rise, it means that the wear amount of the machining knife 122 exceeds the allowable tolerance range. At this time, the machining knife can be adjusted. 122 to perform wear correction. Abrasion correction can be achieved automatically by the positioning measurement of steps S22 to S25 in the above-mentioned Fig. 2 .

As described in FIG. 2 , in step S29 , when the dimensional tolerance is greater than the deviation value, refer to steps S22 to S25 to correct the wear of the machining tool 122 . A similar approach includes as follows, in step S22, cutting on the blank 103 with the reference knife 121 to establish a new reference positioning point. In step S23, the processing knife 122 is used to approach the blank 103 in a circular manner until the blank 103 is cut, and the cutting is performed at a new reference positioning point. In step S24, whether there is a temperature rise hot spot H1 is synchronously monitored from the thermal image MG. If the temperature rise hot spot H1 is detected, in step S25 , the machining knife 122 is positioned (ie, the measured position is obtained) by converting the mechanical coordinates, and the wear correction of the machining knife 122 is completed.

Please refer to Figures 5A and 5B, which are similar to the thermal image-assisted processing methods in Figures 3A and 3B, both of which are used for the positioning of the tool 104, and the same or corresponding parts will not be described again. The difference between the two lies in: this embodiment The processing cutter 123 positioned in the center is a drill bit or a milling cutter. The drill bit or milling cutter can move on the XY plane, XZ plane or YZ plane until it touches the surface of the blank 103 to produce cutting (for example, 1 μm milling thickness or more). At this time, the thermal image MG instantly displays the hot spot H1 of temperature rise when the machining knife 123 mills the blank 103 , so that the processing unit 112 can complete the positioning of the machining knife 123 through mechanical coordinate conversion (that is, obtain the measured position).

After the above-mentioned positioning of the machining knife 123 is completed, after the machining knife has been mass-produced for a period of time or times, the wear detection of the machining knife 123 can be further performed. Please refer to Figures 6A to 6D and Figures 7A to 7D, which are similar to the thermal image-assisted processing methods in Figures 4A to 4D, both of which are used for wear detection of the machining knife 123, and the same or corresponding parts will not be repeated. The difference between the two is that the processing knife 123 for wear detection in this embodiment is drill or milling cutter. The drill bit or milling cutter is gradually worn out after multiple cycles of processing (such as tool length or tool diameter wear), so that the actual cutting amount is gradually smaller than the expected cutting amount. Whether the amount of wear is within the allowable tolerance range (it can be 1 μm or more). For example: as shown in Figures 6A and 7A, when the wear of the machining knife 123 is still small, the machining knife 123 mills at the expected machining position, and then, as shown in Figures 6B and 7B, the reference knife 121 repeats the machining knife 123 The final machining instruction of the slab moves on the blank 103 and is offset outward by a tolerance, so the reference knife 121 will not touch the surface of the blank 103 . At this time, there is no hot spot H1 showing cutting temperature in the thermal image MG, indicating that the wear amount of the machining tool 123 is less than the tolerance. In addition, as shown in Figures 6C and 7C, when the wear amount of the machining knife 123 is large, the machining knife 123 does not cut at the expected machining position, so that the actual machining position 108' deviates from the expected machining position 108, and then, as shown in Figure 6D As shown in Figure 7D, the final machining instruction of the reference knife 121 repeats the processing knife 123 and moves on the blank 103 and shifts outward by a tolerance, but because the cutting amount of the machining knife 123 is insufficient, the reference knife 121 will touch The surface of the billet 103 shows a hot spot H1 of temperature rise in the thermal image MG, indicating that the wear amount of the machining knife 123 is greater than the tolerance.

In addition, similar to the practice of the turning tool, the subsequent size correction of the drill bit or milling cutter can be automatically achieved by the positioning measurement of steps S22 to S25 in the second figure above, and will not be repeated here.

The thermal image-assisted processing method for positioning and wear detection of the grinding tool 106 (such as a grinding wheel) is introduced below. Please refer to FIG. 8, firstly, step S81, positioning a trimmer 105, the coordinates of the tip of the trimmer 105 are known, and the tip of the trimmer 105 is used as a reference positioning point. Step S82, approaching the dresser 105 with the grinding wheel 111 until it contacts Trimmer 105 . Step S83, synchronously monitor whether there is a thermal temperature rise from a thermal image MG. If the hot spot H1 of temperature rise is detected, it means that the grinding wheel 111 has just touched the dresser 105. Then, in step S84, precise dressing is performed according to the required dressing amount to establish a precise grinding surface 117 (ie, the measured position surface). If no temperature rise hot spot H1 is detected, go back to step S82 and keep approaching the trimmer 105 .

Please also refer to Figure 9A, the above-mentioned dresser 105 has been positioned, and the hardness and strength of the dresser 105 are much higher than that of the grinding wheel 111, so it can be used for a long time with almost no wear, and there is no need to go through the dresser every time 105 process of positioning. In addition, when the dresser 105 is dressing the grinding wheel 111 , the processing unit 112 can determine the position of the precise grinding surface 117 of the grinding wheel 111 through the numerical analysis of the controller.

Please also refer to FIG. 9B, and use the tip of the dresser 105 as a reference to precisely dress the surface of the grinding wheel 111 to establish a precise grinding surface 117 (that is, the measured position surface), so that the grinding wheel 111 can restore the full grinding force. At this time, the thermal image MG displays the temperature rise hot spot H1 of the grinding wheel 111 in real time for the processing unit 112 to convert the mechanical coordinates to complete the positioning of the grinding wheel 111 (that is, obtain the measured position). For example: the positioning of the grinding wheel 111 is calculated by adding the coordinates of the cutter tip of the dresser to the coordinates of the movement of the controller.

In addition, please refer to Fig. 10A and 10B, if it is the type of polygonal grinding wheel, similarly as above-mentioned step S82, approach the dresser 105 with the grinding wheel 111 circulation until contacting the dresser 105, at this moment, the contact surface is the side surface of the grinding wheel 111 and the dressing The side surface of the device 105, and then, as in the above step S84, the surface of the grinding wheel is precisely dressed according to the required amount of dressing, so as to establish a precise grinding surface 117.

After the above-mentioned positioning of the grinding tool 106 is completed, the wear detection of the grinding tool 106 can be further performed. Please refer to Figure 8. First, in step S85, the grinding wheel 111 is subjected to mass production grinding and cutting. At this time, the grinding wheel 111 continues to wear a small amount to reduce the diameter of the grinding wheel 111, so that the grinding wheel 111 has a wear amount after grinding (that is, the initial grinding wheel size minus the remaining size after grinding) ). In step S86, the grinding wheel 111 repeats the machining instruction to perform tracking offset cutting. For example, the grinding wheel 111 is used to track and move on the blank 103 and deviate outwards by a tolerance d or a predetermined deviation value relative to a grinding surface of the blank 103 . Step S87, synchronously monitor whether there is a thermal temperature rise on the grinding surface from the thermal image MG. If the hot spot H1 of temperature rise is monitored, in step S88, it is judged that the amount of wear of the grinding wheel 111 is greater than the tolerance d (or predetermined deviation value), indicating that the dimensional tolerance of the blank is greater than the deviation value, and the wear value needs to be adjusted (as in the step of Fig. 1C S18), to reprocess or modify the workpiece to be processed (back to step S85). If no temperature rise hot spot H1 is detected, and it is judged that the wear amount of the grinding wheel 111 is less than the tolerance d (or a predetermined deviation value), then return to step S85 and continue grinding.

Please also refer to Figures 11A and 11B, which respectively illustrate two embodiments in which the wear amount of the grinding wheel 111 is less than and greater than the tolerance. In the present embodiment, the grinding wheel 111 wears out gradually after multiple cycles of processing, so that the actual cutting amount of the grinding wheel 111 is gradually smaller than the expected cutting amount. within the allowable tolerance range. Firstly, the grinding wheel 111 is precisely trimmed by the dresser 105, and the reference positioning surface 107 on the grinding wheel surface is established by using the movement coordinates of the controller, and the blank 103 is tracked and shifted to be cut with reference to the positioning surface 107. As shown in FIG. 11A , when the wear amount of the grinding wheel 111 is small, the grinding wheel 111 tracks and moves on the blank 103 and deviates outward by a tolerance d, so the grinding wheel does not touch the surface of the blank 103 . At this time, the thermal image MG has no The temperature rise hot spot H1 of grinding is displayed, indicating that the wear amount of the grinding wheel 111 is smaller than the tolerance d. As shown in Figure 11B, when the amount of wear of the grinding wheel 111 is too large, even if the grinding wheel 111 tracks and moves outwards on the blank 103 by a tolerance d, the grinding force of the grinding wheel 111 is insufficient, so the grinding wheel 111 will still In contact with the surface of the blank 103 , the hot spot H1 of temperature rise is displayed in the thermal image MG, indicating that the wear of the grinding wheel 111 is greater than the tolerance.

From the above description, it can be known that when the thermal image MG shows the hot spot H1 of temperature rise, it means that the wear amount of the grinding wheel 111 is not within the allowable tolerance range, and at this time, wear correction can be performed on the grinding wheel 111 . The size correction can be achieved automatically through steps S82 to S84 in FIG. 8 above. The wear correction of the grinding wheel 111 is generally similar to that described in Fig. 8, including: dressing the grinding wheel surface with the dresser 105, and synchronously monitoring the thermal temperature rise of the grinding wheel surface with the thermal image MG, and then, according to the thermal image MG, A new precise grinding surface (ie, the measured position plane) is established on the surface of the grinding wheel to correct the wear of the grinding wheel 111 .

Please refer to Figures 12A and 12B. In addition to the auxiliary positioning and wear detection of the cutting tool 104 and the grinding tool 106 in the above embodiments, the thermal imaging auxiliary processing method can also be used for angle measurement and plane measurement of the workpiece (such as the blank 103) For measurement, please also refer to the positioning measurement process described in Figure 1B. In Figure 12A, a positioned reference knife 121 or milling cutter or grinding tool is used to approach the surface of the blank 103 in a circular manner, and the thermal image MG is used to simultaneously monitor the thermal temperature rise on the surface of the blank 103 to obtain the first temperature rise The hot spot H1 obtains the first position coordinate information (ie, the first positioning point or the first positioning surface) through the conversion of the mechanical coordinates of the controller. In addition, a positioned reference knife 121 or milling cutter or grinding tool is used to approach the surface of the blank 103 in a circular manner, and the thermal image MG is used to simultaneously monitor the thermal temperature rise of the surface of the blank 103 to obtain the second hot spot H2 of temperature rise, by The controller converts the mechanical coordinates to obtain the second position coordinate information (that is, the second positioning point or second positioning plane). The first positioning point and the second positioning point are separated by a predetermined distance, and the slope and inclination angle of the surface of the blank 103 are calculated according to the distance and height difference between the first positioning point and the second positioning point, so as to complete the angle measurement.

In Fig. 12B, similar to the above method, the thermal image MG is used to simultaneously monitor the thermal temperature rise on the surface of the blank 103 to obtain at least three temperature rise hotspots H1 to H3 (ie at least three positioning points or positioning surfaces). According to the planes and height differences formed by at least three positioning points, the flatness of the surface of the blank 103 is calculated to complete the plane measurement.

The thermal image auxiliary processing device and its auxiliary processing method according to the above embodiments of the present invention can be used for auxiliary positioning and wear detection of a tool or a grinding tool, and for measuring the size, angle or flatness of the object to be measured. Therefore, the present invention can avoid problems such as increased downtime of equipment caused by manual and visual measurement, and errors in resetting the tool. The operation is more convenient, the cost is low, and it is not easily affected by environmental factors (including light source, surface material, etc.), and the installation and measurement of the thermal image sensing module are easy, no precise calibration is required, and the measurement accuracy is the smallest on the machine The effective moving distance (machining accuracy can be 1 μm or more), so it can meet the requirements of the machining accuracy of the machine tool.

To sum up, although the present invention has been disclosed by the above embodiments, it is not intended to limit the present invention. Those skilled in the art of the present invention can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the scope of the appended patent application.

S11~S14: Steps

Claims (13)

A thermal image auxiliary processing method, comprising: establishing a reference positioning point or surface with a reference component; positioning a processing tool with the reference positioning point or surface; and obtaining the processing tool according to a temperature rise hot spot in a thermal image A determined position or surface, wherein positioning the processing tool includes: using a reference tool as the reference component to cut on a blank to establish the reference positioning point; using the processing tool to approach the blank in a cycle, and synchronously Monitoring the thermal temperature rise of the processing knife; and if a temperature rise hot spot is detected, the determined position is positioned by converting the mechanical coordinates. The thermal image-assisted processing method as described in claim 1, which further includes: using the tip of the reference knife as the measured position; using the measured position and a processing instruction to perform a tracking offset on the blank Cutting; monitoring the thermal temperature rise of the reference knife to judge whether the size of the blank meets a tolerance standard; and deciding whether to correct the blank according to the judgment result. The thermal image-assisted processing method as described in claim 2 further includes: performing wear detection of the processing knife, including: Use the reference knife and the processing instruction to track and move on the blank, and offset a distance relative to the cutting surface of the blank; simultaneously monitor the thermal temperature rise of the cutting surface; if there is no hot spot of temperature rise, judge the The wear amount of the processing knife is less than the tolerance standard; and if there is a hot spot of temperature rise, it is judged that the wear amount of the processing knife is greater than the tolerance standard. The thermal image-assisted processing method as described in claim 3, wherein when it is judged that the wear amount of the processing knife is greater than the tolerance standard, it further includes: repositioning the processing knife by mechanical coordinate conversion to complete the wear correction of the processing knife . The thermal image-aided processing method as described in Claim 3, wherein the tolerance is the difference allowed by the processing personnel for the size of the finished blank. The thermal image-assisted processing method as described in Claim 1, wherein the processing knife is a grinding wheel, comprising: using the tip of a dresser as the reference positioning point, dressing the surface of the grinding wheel, and synchronously monitoring the heat of the grinding wheel surface temperature rise situation; and if a temperature rise hotspot is detected, the determined position plane is positioned through mechanical coordinate conversion. The thermal image-aided processing method as described in Claim 6 further includes: performing wear detection of the grinding wheel, including: using the grinding wheel to track and move on a blank and offset a distance relative to the grinding surface of the blank; Synchronously monitor the thermal temperature rise of the grinding surface; If there is no hot spot of temperature rise, it is determined that the wear amount of the grinding wheel is less than a tolerance standard; and if there is a temperature rise hot spot, it is judged that the wear amount of the grinding wheel is greater than the tolerance standard. The thermal image-aided processing method as described in claim 7, wherein when it is judged that the wear amount of the grinding wheel is greater than the tolerance standard, it further includes: using the tip of the dresser as the measured position, dressing the surface of the grinding wheel, and synchronously Monitoring the thermal temperature rise on the surface of the grinding wheel; and repositioning the surface of the grinding wheel by converting mechanical coordinates to complete the wear correction of the grinding wheel if a hot spot of temperature rise is detected. The thermal image-aided processing method as described in claim 1 is used for angle measurement of a blank, wherein at least two measured positions on the blank are obtained based on at least two hot spots of temperature rise, so as to calculate the The inclination angle of the billet. The thermal image-aided processing method as described in Claim 1 is used for planar measurement of a blank, wherein at least three measured positions on the blank are obtained based on at least three hot spots of temperature rise, to calculate The flatness of the blank. A thermal image auxiliary processing device is used to locate an object to be measured. The thermal image auxiliary processing device includes: a thermal image sensing module that generates a thermal image to monitor the thermal temperature rise of the object to be measured; and a processing The unit includes a controller, the processing unit judges the thermal image, and if the object under test generates a temperature rise hot spot, the controller performs mechanical coordinate conversion to obtain a position coordinate information of the object under test, wherein the The object to be tested includes a knife or abrasive tool that is cyclically approaching a billet surface and just touching the billet surface, indicating that the When the temperature rises hot spot, the processing unit converts the mechanical coordinates to obtain the position coordinate information for locating the object under test and calculating the size of the object under test. The thermal image auxiliary processing device as described in claim 11, wherein the processing unit obtains at least two position coordinate information through conversion of the mechanical coordinates according to at least two temperature rise hotspots of the object under test, so as to calculate the temperature of the object under test slope. The thermal image auxiliary processing device as described in claim 11, wherein the processing unit obtains at least three position coordinate information through conversion of the mechanical coordinates according to at least three temperature rise hot spots of the object to be measured, so as to calculate the temperature of the object to be measured Flatness.

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