JP6131608B2 - Packing twist detection device and control method thereof - Google Patents

Description

  The present invention relates to a packing twist detection device that detects abnormalities such as lifting and twisting of a packing disposed in a core plate in a manufacturing process of a heat exchanger or the like, and a control method thereof.

  Patent Document 1 discloses a two-dimensional shape measuring instrument, a two-dimensional shape measuring instrument, or a two-dimensional shape measuring instrument for detecting an inclination angle of a sealing surface of a packing disposed in a core plate having a plurality of claw portions formed on an outer peripheral edge. The two-dimensional shape measuring instrument comprises: a driving mechanism that relatively moves one of the core plates in the longitudinal direction of the core plate; and a calculation unit that calculates an inclination angle of the seal surface of the packing. The cross section of the core plate and the packing is measured for each predetermined pitch of the claw portion in the longitudinal direction of the core plate, and the calculation unit is configured to measure the predetermined pitch based on the measurement information of the cross section. Further, there is disclosed a packing twist detection device that calculates an inclination angle of a seal surface of the packing obtained by subtracting an inclination angle of the core plate, and determines whether the packing is good or bad by comparing with a predetermined threshold value.

JP 2010-256180 A

However, in the packing twist detection device of Patent Document 1, the measurement information measured by the two-dimensional shape measuring instrument is transmitted to a calculation unit such as a sequencer, and the calculation unit calculates the inclination of the seal surface of the packing. Is compared with a predetermined threshold value to make a pass / fail judgment.
For this reason, A / D conversion is performed on the measurement data of the two-dimensional shape measuring instrument, and the time for transmitting to the calculation unit via a communication cable or the like and the calculation for determining the threshold value of the measurement data input to the calculation unit Processing time is required, and the time until the determination process is completed depends on the processing capability and communication capability of the calculation unit such as a sequencer, and the drive from the first data processing to the next data processing is performed. The two-dimensional shape measuring instrument is relatively moved by the mechanism, and it becomes difficult to detect the twisting of the packing at a position corresponding to the entire pitch of the claw portion. is there.
In addition, when trying to determine without omission for all pitches by the conventional method, it is necessary to slow down the feed speed of the drive mechanism, and the time until the end of the determination becomes longer, and the pre-process for mounting the packing inside the core plate In addition, the timing of the post-process for performing caulking and fixing between the core plate and the radiator tank is not matched, and other processes are matched with the detection timing of the packing abnormality, which may cause a reduction in productivity.

  Therefore, in view of such a situation, the present invention is provided at the position of the claw portion in order to detect the twist or lift of the packing disposed inside the long core plate in which a plurality of claw portions are provided at a predetermined pitch on the outer peripheral wall. Provided is a highly reliable packing torsion detection apparatus and a control method thereof that can perform surface profile measurement and sequential determination in synchronism to process packing abnormality determination in the entire core plate at high speed.

The packing twist detection device (2) according to the present invention is configured such that when the packing (11) is disposed inside the core plate (10) in which a plurality of claws (101) are arranged on the outer peripheral edge, 11) A two-dimensional shape measuring instrument (20) for measuring the two-dimensional shape of the surface of the object to be measured and detecting the presence or absence of twist and input / output for controlling the input / output of the measuring instrument (20). A moving means (23) for moving the controller (21), the measuring instrument (20), or the core plate (10) relative to the longitudinal direction of the core plate (10); A packing torsion detection device comprising a movement control section (22) for controlling the moving means (23), wherein at least the measuring device (20) receives reflected light of the light irradiated on the object to be measured. Sensor head for detecting the amount (200 And controlling the light projection and reception of the sensor head (200), measuring the surface profile of the object to be measured from the detected received light amount distribution, comparing the measurement result with a predetermined threshold value, and determining the result. Is output as a binary sequential determination signal (JDG), and the sequential determination output from the measurement control unit by operating the two-dimensional shape measuring instrument for each nail portion of the core plate Of the signals, the number of times determined to be normal is integrated, and when the integrated number of times determined to be normal is equal to or greater than a predetermined threshold corresponding to the number of the nail portions (101), packing is performed in all the nail portions (101). And (11) normal number measurement determination means (211) for determining that there is no abnormality in the arrangement.
In the second invention, the movement control unit (22) includes position detection means (221) for outputting an operation pulse corresponding to a relative position of the two-dimensional shape measuring instrument (20) with respect to the core plate (10). The instrument input / output control unit (21) synchronizes with the operation pulse (CNT1) output from the position detection means (221), and the second input / output control unit (21) performs the second operation for each claw portion (101) of the core plate (10). Waveform generation means (210) for generating an energization waveform (TRG) for operating the dimension shape measuring instrument (20) is provided.

Further, the control method of the packing torsion detection device of the present invention is outputted from the position detection means (221) that outputs an operation pulse corresponding to the relative position of the two-dimensional shape measuring instrument (20) with respect to the core plate (10). In synchronism with the operation pulse (CNT1), a measurement waveform generation process (S130) for starting measurement by the measuring instrument (20) for each of the claw parts (101), and the light irradiated to the object to be measured When the sensor head (200) that detects the amount of received reflected light moves, the driving waveform (TRG) generated in synchronization with the operation pulse (CNT1) causes each of the plurality of claws (101) to move. The two-dimensional shape measuring instrument (20) is driven at a timing corresponding to the position, the surface profile of the packing (11) is measured, and the result is obtained as the two-dimensional shape measuring instrument (20 The nail unit measurement / sequential determination process (S140) for determining the presence or absence of abnormality by a built-in sequential determination unit (201) and outputting only the pass / fail determination result as a determination signal (JDG) consisting of binary data; Of the determination signals (JDG), the number of times determined to be normal is integrated by a normal number measurement determination unit (211) built in the instrument input / output control unit (21), and a threshold determination sequential determination result output count process ( S150), the two-dimensional shape measuring instrument is operated for each nail portion of the core plate, and the number of normal determinations accumulated in the sequential determination result output count process (S150) is determined by the nail portion (101). It is characterized in that it is determined that there is no abnormality in the arrangement of the packings (11) in all the claw portions (101) when the number is a predetermined threshold or more according to the number.

According to the present invention, the measuring instrument (20) measures the surface profile of the packing (11) in synchronization with the operation pulse (CNT1) output from the position detection means (221), and the claw portion ( 101) It is possible to sequentially determine the presence / absence of abnormality of the packing (11) arranged inside the core plate (10) for each claw part.
At this time, instead of transmitting the measurement value output from the two-dimensional shape measuring instrument to a calculation unit such as a sequencer for determination as in the prior art, the measurement control unit (201) performs threshold determination for each nail unit. Only the result obtained is transmitted as a sequential determination signal (JDG) composed of binary data from the secondary side shape measuring instrument (20) to the measuring instrument input / output control section (21), and the sequential determination determined to be normal. Since the number of signals (JDG) (CNT2) is counted to determine the quality of the whole, high-speed processing is possible, and it is possible to detect the presence or absence of an abnormality in the packing (11) without leakage for each nail (101) So it is extremely reliable.

The perspective view which shows the outline | summary of the radiator to which the packing twist detection apparatus of this invention is applied. The schematic diagram which shows the outline | summary of the packing twist detection apparatus of this invention. The perspective view which shows the positional relationship of the two-dimensional shape measuring device used for the packing twist detection apparatus of this invention, and a to-be-measured part. The block diagram which shows the structural example of the packing twist detection apparatus of this invention. The flowchart which shows an example of the abnormality determination method used for the packing twist detection apparatus of this invention. The schematic diagram which shows the detection result in the case of determining with it being normal. The schematic diagram which shows the detection result at the time of twisting so that packing may lean on the side wall surface of a core plate. The schematic diagram which shows the detection result at the time of twisting so that packing may lean on the center part of a core plate. The schematic diagram which shows the detection result when packing rises. The timing chart which shows the case where it determines with normal by the packing twist detection apparatus of this invention. The timing chart which shows the example in the case of determining with abnormality by the packing twist detection apparatus of this invention. The characteristic view which shows the effect with respect to the speed-up of this invention with a comparative example.

In the present invention, when manufacturing a heat exchanger 1 such as a radiator, a heater core, an intercooler, etc., a packing 11 (UP, LWR) is disposed inside a core plate 10 (UP, LWR), and the core plate 10 (UP, LWR) is arranged. When the plurality of claws 101 arranged in a row on the outer peripheral edge are bent in order and fixed to the flange 121 (UP, LWR) of the radiator tank 12 (UP, LWR), the twist of the packing 11 (UP, LWR) The present invention relates to a packing twist detection device 2 that detects abnormalities such as lifting.
First, with reference to FIG. 1, the structure of the radiator 1 in which the packing twist detection apparatus 2 of this invention is used is demonstrated easily.

  The radiator 1 includes a heat dissipating core 13 in which a plurality of heat dissipating fins are stacked, an upper core plate 10 (UP) and a lower core plate (LWR) disposed above and below the upper core plate 10 (UP), The lower packing 11 (LWR), the upper tank 12 (UP), and the lower tank 12 (L) are configured.

The claw portions 101 (UP, LWR) of the upper and lower core plates 10 (UP, LWR) are attached to the flange portion 121 of the tank 12 (UP, LWR) in a state where watertightness is secured via the packing 11 (UP, LWR). It is fixed by caulking.
At this time, if the packing 11 (UP, LWR) mounted on the upper and lower core plates 10 (UP, LWR) is lifted or twisted, the sealing performance of the packing 11 (UP, LWR) is reduced and cooling water leaks. May cause.
For this reason, it is necessary to reliably detect the abnormality of the packing 11 (UP, LWR) before caulking.
The packing twist detection device 2 of the present invention is effective in detecting such an abnormality in the packing 11 (UP, LWR).

An outline of the packing twist detection device 2 according to the embodiment of the present invention will be described with reference to FIGS. 2A, 2B, and 2C.
The packing twist detection device 2 includes a two-dimensional shape measuring instrument 20 that measures the two-dimensional shape of the surface of the object to be measured, an input / output control unit 21 that controls input / output of the measuring instrument 20, and the measuring instrument 20 or core plate. 10 includes a moving unit 23 that relatively moves one of 10 in the longitudinal direction of the core plate 10 and a movement control unit 22 that controls the moving unit 23.

The measuring instrument 20 controls the light receiving / receiving amount of reflected light of the light irradiated to the object to be measured, and controls the light projection / reception of the sensor head 200, and the surface profile of the object to be measured from the detected light amount distribution. A measurement control unit 201 that measures, determines the quality by comparing the measurement result with a predetermined threshold, and outputs the result as a binary sequential determination signal JDG.
The sensor head 200 includes a light projecting unit that scans laser light in a two-dimensional direction and projects the laser light onto an object to be measured, and a light receiving unit that includes a two-dimensional sensor that receives the reflected light.
As shown in FIG. 2B, two sets of sensor heads 200 are provided to measure the state of the packing 11 on the engine side (ENG) and the grill side (GRL) of the core plate 10, A laser beam having a two-dimensional spread is projected onto the surface of the packing 11 from the wall surface to the center portion, the surface of the object to be measured is scanned, and the reflected light is received by a two-dimensional sensor. The angle of the reflected light and the received light amount distribution are detected, and the peak waveform of the received light amount distribution that continuously changes in the scanning direction according to the contour shape of the cross-sectional surface of the object to be measured is calculated as the surface profile.
At this time, it is possible to quickly detect the presence or absence of an abnormality by calculating a deviation from the state in which the packing 11 is normally disposed from the difference from the reference surface profile and determining the threshold value.

The movement control unit 22 includes, for example, a position detection unit 221 such as a rotary encoder, and a movement control mechanism 220 such as a servo amplifier.
The rotary encoder 221 outputs an operation pulse CNT1 corresponding to the relative position of the measuring instrument 20 with respect to the core plate 10.
In the present embodiment, the servo motor SM is used as the moving means 23 that relatively moves the sensor head 200 in the longitudinal direction of the core plate 10.
The measuring instrument input / output control unit 21 generates an energization waveform TRG that operates the measuring instrument 20 for each claw 101 (1 to n) of the core plate 10 in synchronization with the operation pulse CNT1 output from the rotary encoder 221. A waveform generation unit 210 and a normal number measurement determination unit 211 that measures the number of times CNT2 determined to be normal in the sequential determination signal JDG output from the measurement control unit 201 and determines whether or not there is an abnormality.

An example of the control method and abnormality determination method used in the packing twist detection device of the present invention will be described based on the flowchart of FIG.
In the reference position moving process in step S100, the servo motor SM23 is driven by the servo amplifier 220, and the sensor head 200 of the measuring instrument 20 is moved to a predetermined reference position (P0).
In the count initialization step of step S110, the value of the encoder counter CNT1 and the value of the normal determination count counter CNT2 are reset.
In the measurement movement start process in step S120, measurement by the two-dimensional shape sensor is started simultaneously with the drive of the servo motor SM23.
At this time, a drive waveform TRG for driving the measuring instrument 20 is generated in order to perform measurement for each claw in synchronization with the value of the encoder counter CNT1 by the measurement waveform generation process in step S130.
In the measurement / sequential determination process for each nail part in step S140, each of the nail parts 101 (1) to (n) is generated by the drive waveform TRG generated in synchronization with the encoder counter CNT1 when the sensor head 200 moves. The two-dimensional shape measuring instrument 20 is driven at a timing corresponding to the position, the surface profile of the packing 11 is measured, and the result is subjected to threshold determination by the sequential determination unit 201 provided in the two-dimensional shape measuring instrument 20. Then, only the pass / fail judgment result is output as a judgment signal JDG consisting of binary data of 0/1 or Hi (high) / Lo (low).
In the present embodiment, 1 is output as the sequential determination signal JDG at the time of normal detection, and 0 is output as the sequential determination signal JDG at the time of abnormality detection.
In the sequential determination result output count process of step S150, the determination result CNT2 output from the two-dimensional shape measuring instrument 20 is integrated by the normal number measurement determination unit 211 in the high-speed counter 21.
In the end determination step of step S160, it is determined whether the servo motor SM23 has reached a predetermined movement amount as the measurement end position. If it is the end position, the determination is YES, and the sequential determination is ended, and whether there is a packing abnormality in step S170. The process proceeds to the determination process, and if it is not the end position, the determination is No, and the process returns to the measurement waveform generation process in step S130 and the determination is repeated.
In the packing abnormality presence / absence determination step in step S170, the presence / absence of abnormality is determined based on whether or not the value of the counter CNT2 measured by the normal number measurement determination unit 211 is a predetermined count number.
If the counter CNT2 has reached the predetermined count number, the determination is Yes, the process proceeds to the normal determination step of step S180, indicating that there is no abnormality in the packing 11, the measurement ends, and the counter CNT2 has the predetermined count number. If not, the determination is No, the process proceeds to the abnormality determination process in step S190, and indicates that some abnormality has occurred in the packing 11, and the measurement is terminated.

With reference to FIGS. 4A, 4B, 4C, and 4D, an example of a more specific sequential determination method used in the packing twist detection device 2 of the present invention and detection results will be described.
In the present embodiment, the measurement value in a state in which the packing 11 is normally arranged in the core plate 10 is previously stored in the sequential determination unit 201 as a reference profile, and the difference from the actual measurement value is determined as a threshold value. The result is output as a sequential determination signal JDG of 0/1 or Hi / Lo.
When the packing 11 is correctly arranged in the core plate 10, as shown in FIG. 4A, the output due to the difference between the measurement profile and the reference profile is slightly generated due to the deviation of the center position of the packing 11. Since it is within the predetermined threshold value ± V _REF , the determination is not abnormal, and 1 is output as a sequential determination signal indicating normal.

When the packing 11 is twisted so as to lean against the side wall of the core plate 10, the output due to the difference between the measurement profile and the reference profile increases as shown in FIG. 0 is output as a sequential determination signal indicating this.
Similarly, when the packing 11 is twisted so as to lean toward the center side of the core plate 10, as shown in FIG. 4C, the output due to the difference between the measurement profile and the reference profile increases, and exceeds a predetermined threshold value. As shown in FIG. 4D, when 0 is output as a sequential determination signal indicating that the abnormality is present and the packing 11 is in a floating state even if the packing 11 is disposed at the center of the groove portion of the core plate 10, Since the output due to the difference between the measurement profile and the reference profile increases and exceeds a predetermined threshold value, 0 is output as a sequential determination signal indicating abnormality.
Instead of transmitting the output of the two-dimensional shape sensor to the calculation unit and calculating the presence / absence of an abnormality in the calculation unit as in the past, the threshold determination unit built in the two-dimensional shape sensor is used to obtain 0/1. Since only the detection result is output, the output result is obtained almost simultaneously with the measurement, and further, only one signal indicating the determination result in binary is transmitted to the high-speed counter 21, so that there is almost no measurement delay due to communication. Absent.

With reference to FIG. 5A and FIG. 5B, the measurement timing and determination result of the packing twist detection apparatus of this invention are demonstrated.
As shown in FIG. 5A, an encoder counter CN1 is transmitted in synchronization with the output of the rotary encoder 221, and using this as a trigger, a drive waveform TRG for outputting the two-dimensional sensor head 200 is formed and arranged on the side wall of the core plate 10 The two-dimensional sensor head 200 operates in synchronization with the position of the provided claw portion 101, the two-dimensional profile in each claw portion 101 is measured, and the determination result is output as a binary sequential determination signal JDG. It is integrated as a normal detection number CNT2 in the counter 21, when the normal detection number CNT2 is equal to a predetermined number of detection times N _REF is determined that there is no abnormality in the packing 11.
As shown in FIG. 5B, if any abnormality such as twisting or lifting occurs in the packing 11 at any of the measurement positions P1 to Pn, the sequential determination signal becomes 0, and finally the high-speed counter since normal detection number CNT2 is integrated by 21 is less than a predetermined number of detection times N _REF, it is understood that an abnormality has occurred in the packing 11.

With reference to FIG. 6, the effect of the packing twist detection device of the present invention on speeding up will be described.
The comparative example shows the time required for one measurement when the conventional packing twist detection device is used, and the example shows the time required for one measurement when the packing twist detection device of the present invention is used. .
As shown in FIG. 6, the amount of communication data is drastically reduced as compared with the conventional method. Therefore, conventionally, it took about 23 ms per measurement. However, according to the present invention, one measurement time is 4 times. It was shortened to 5 ms, and it was confirmed that processing can be performed at a speed about 5 times the conventional speed.

In the above embodiment, the two-dimensional shape measuring instrument 20 is operated by synchronizing the measurement trigger with a position where the claw portion 101 is present, and the presence or absence of abnormality is detected, but is synchronized with the position where the claw portion 101 is not present. You may make it measure.
Moreover, in the said embodiment, although the example which moves the laser two-dimensional sensor 200 to the longitudinal direction of the core plate 10 was shown, while fixing the laser two-dimensional sensor 200 and moving the core plate 10 with the drive means 23, The presence or absence of an abnormality in the packing 11 may be detected.
Further, the detection control high-speed counter 21 may be provided so as to independently control the respective laser two-dimensional sensors 200 on the engine side and the grill side of the core plate 10. The two laser two-dimensional sensors 200 are alternately controlled by one detection control counter 21 so that the engine side and the grill side are sequentially determined alternately so that the other side is measured at a position without the claw portion 101. Alternatively, the left and right may be measured and determined at a time.

  In the above-described embodiment, the packing twist detection device used in the process of manufacturing the radiator as the heat exchanger has been described, but not only the radiator but also the heater core, the intercooler, and the like, the plate-shaped member and the hat-shaped member having the flange portion, In the process of manufacturing a heat exchanger having a seal structure in which a relatively long packing is inserted between the two, a malfunction can be appropriately detected in the process of manufacturing a heat exchanger having a seal structure.

1 Heat exchanger (radiator)
DESCRIPTION OF SYMBOLS 10 Core plate 101 Claw part 11 Packing 2 Packing twist detection apparatus 20 Two-dimensional shape measuring device 200 Sensor head 201 Measurement control part 21 Input / output control part 210 Waveform generation means 211 Normal number measurement determination means 22 Movement control part 221 Position detection means ( Rotary encoder)
23 moving means JDG sequential determination signal CNT1 operation pulse TRG energization waveform CNT2 normal determination value input count S130 measurement waveform generation process S140 measurement for each nail part / sequential determination process S150 sequential determination result output count process

Claims (4)

When the packing (11) is arranged inside the core plate (10) in which a plurality of claw portions (101) are arranged on the outer peripheral edge, the presence or absence of twisting of the packing (11) is detected. As expected
A two-dimensional shape measuring instrument (20) for measuring the two-dimensional shape of the surface of the object to be measured, an input / output control unit (21) for controlling input / output of the measuring instrument (20), and the two-dimensional shape measuring instrument (20 ) Or a moving means (23) for moving either one of the core plates (10) relative to the longitudinal direction of the core plate (10), and a movement control unit for controlling the moving means (23). (22) a packing twist detection device comprising:
At least the two-dimensional shape measuring instrument (20) controls the sensor head (200) that detects the amount of reflected light of the light irradiated to the object to be measured, and the light projection and light reception of the sensor head (200). At the same time, the surface profile of the object to be measured is measured from the detected received light amount distribution, the quality is judged by comparing the measurement result with a predetermined threshold, and the result is output as a binary sequential judgment signal (JDG). Actuate the two-dimensional shape measuring instrument for each claw part of the control part (201) and the core plate, and integrate the number of times determined to be normal among the sequential determination signals output from the measurement control part, Normal number measurement determination means for determining that there is no abnormality in the arrangement of the packings (11) in all the nail portions (101) when the accumulated number of times determined to be normal is equal to or greater than a predetermined threshold corresponding to the number of nail portions. (211 When packing twist detecting device characterized by comprising a (2). The movement control unit (22) includes position detection means (221) for outputting an operation pulse corresponding to a relative position of the two-dimensional shape measuring instrument (20) with respect to the core plate (10),
The two-dimensional shape for each claw portion (101) of the core plate (10) in synchronization with the operation pulse (CNT1) output from the position detection means (221) by the measuring instrument input / output control portion (21). The packing twist detection device (2) according to claim 1, further comprising a waveform generation means (210) for generating an energization waveform (TRG) for operating the measuring instrument (20). The packing twist detection device (2) according to claim 2, wherein the position detection means (2 2 1) is a rotary encoder. A two-dimensional shape measuring instrument (20) for measuring the two-dimensional shape of the surface of the object to be measured, an input / output control unit (21) for controlling input / output of the measuring instrument (20), and the two-dimensional shape measuring instrument (20 ) Or moving means (23) for relatively moving one of the core plates (10) in which a plurality of claw portions (101) are arranged on the outer peripheral edge with respect to the longitudinal direction of the core plate (10). And a movement control unit (22) for controlling the moving means (23), and the packing (11) is lifted when the packing (11) is disposed inside the core plate (10). And a control method of a packing twist detecting device for detecting the presence or absence of twisting,
at least,
The claw portion is synchronized with the operation pulse (CNT1) output from the position detection means (221) that outputs the operation pulse corresponding to the relative position of the two-dimensional shape measuring instrument (20) with respect to the core plate (10). A measurement waveform generation step (S130) for starting measurement by the measuring instrument (20) every (101);
When the sensor head (200) for detecting the amount of reflected light of the light irradiated onto the object to be measured moves, the drive waveform (TRG) generated in synchronism with the operation pulse (CNT1) The two-dimensional shape measuring instrument (20) is driven at a timing corresponding to each position of the claw portion (101), the surface profile of the packing (11) is measured, and the result is obtained as the two-dimensional shape measuring instrument ( 20) A sequential determination unit (201) built in 20) determines the presence or absence of abnormality as a threshold, and outputs only the pass / fail determination result as a determination signal (JDG) composed of binary data; ,
Of the determination signals (JDG), the number of times determined to be normal is integrated by a normal number measurement determination unit (211) built in the instrument input / output control unit (21), and a sequential determination result output count process for determining a threshold value. (S150)
The two-dimensional shape measuring instrument is operated for each nail part of the core plate, and the normal determination number accumulated in the sequential determination result output count process (S150) is a predetermined threshold corresponding to the number of the nail parts (101). A control method for a packing torsion detection device, characterized in that it is determined that there is no abnormality in the arrangement of the packing (11) in all the claw portions (101) at the above time .

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