A control method for online detection of wire diameter

Abstract

The present invention discloses a control method for online detection of wire diameters. The method replans an internal central control circuit board, improves the installation method of components, and retains the original operation method. While retaining the original alarm, a one-button selection alarm operation and shutdown mode is added to simultaneously meet the production requirements of various wires including single fire-resistant wires. The requirement of no alarm condition when starting the machine for deviation adjustment can be achieved through the start-up linkage of feedback control. The two systems of feedback control and wire break detection can be designed together, and the original wire break detection system is concentrated in the feedback control device. On the basis of maintaining the original functions, the wiring is simplified and the operation is convenient.

Description

Technical Field

[0001] The present invention specifically relates to a control method for online detection of wire diameter. Background Art

[0002] The 70 extruder production line may experience wire breakage or conductor thinning during production due to reasons such as pre-arrangement of copper wire and wire jamming during production. Currently, the original 70 machine is equipped with a wire break detection function that connects the bare copper wire core before extrusion to the metal shell of the equipment after the wire break, that is, by short-circuiting to the ground to activate the wire break detection function.

[0003] Because the device's exterior was painted, its sensitivity was low and it was only effective for conductive copper conductors, making it difficult to detect broken insulated wires after extrusion. Later improvements resulted in the use of capacitive, non-contact proximity switches as breakage detection sensors, enabling them to detect breaks in insulation. However, the sensing distance was limited, preventing them from detecting breaks outside the detection area. Furthermore, if a break was detected within the detection area, the breakage detection function would not be triggered if the wire behind the break remained within the set distance. The accuracy of the proximity switch's detection head gradually decreases over time and due to the effects of on-site water, heat, and air on the sensor head. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a control method for online detection of wire diameter, by utilizing the improvement of the feedback control device of the diameter gauge, the redesign and wiring of the relevant circuits, and by combining the high precision of the infrared detection of the diameter gauge with the high sensitivity of the special detector AFR for triggering the wire break, the performance of instant detection and processing of wire breakage in online production is greatly improved.

[0005] In order to solve the above technical problems, the technical solution of the present invention is:

[0006] A control method for online detection of wire diameters, wherein the main control circuit for online detection of wire diameters includes detection input, control, and output circuits, and is uniformly powered by a 24V DC power supply, and comprises the following steps:

[0007] S1. When the "Feedback Enable" switch SA-2 is turned on and feedback control is enabled, the normally open contact of the "Feedback Control Output" closes, connecting the intermediate low-voltage relay KA2. The normally open contact KA2-1 of relay KA2 closes, and the wire diameter abnormality alarm enable indicator lights up. When the infrared ray of the diameter gauge detects abnormalities such as over-limit, concave-convex, or broken wire on the wire in progress, the diameter gauge immediately outputs an alarm signal to the control terminal DSP-3A, the alarm contact closes, and the control relay KA3 is turned on. At the same time, the normally open contact KA3-1 of relay KA3 closes and remains closed, and the extended output contact KA3-2 of relay KA3 closes, turning on the rotating alarm light, sounding an alarm, and prompting the user to start the machine for deviation adjustment.

[0008] S2. When the extruder is first started and adjusted, the wire diameter is unstable. The operator is operating at the console on the side of the extruder head and is in a manned state. The operator only needs to select the control switch to the "alarm" mode. When the diameter gauge detects an abnormal wire diameter, it only sends an alarm message to the operator on site, and does not proceed to the next step to perform automatic control processing due to the abnormal wire diameter;

[0009] S3. After the deviation adjustment is completed, select the control switch to "Alarm + Stop" mode. The system's automatic control and processing function for abnormal wire diameter is enabled. The control power indicator light is yellow, and the corresponding wire diameter status indicator light is green when the wire diameter is normal, and red when the wire diameter is abnormal. The specific steps are as follows:

[0010] S31. When an abnormality is detected, the corresponding relay KA3 is connected, the extended normally closed contact KA3-3 of the relay KA3 is disconnected, and the normally open contact KA3-4 is closed. Accordingly, the normal green indicator light goes out, and the abnormal red indicator light comes on. At the same time, the automatic control low-voltage intermediate relay KA4 is connected, and the normally open contact KA4-2 of the low-voltage intermediate relay KA4 is connected, and the self-locking is maintained;

[0011] S32. After the low-voltage intermediate relay KA4 is turned on, its extended normally-open contact KA4-1 closes, connecting to the control input terminals E1 and E3 of the detection controller AFR. The normally-open contact between terminals 6 and 8 of the controller AFR immediately opens, immediately cutting off the operating signals of the main machine, traction machine, and strip injection machine. Simultaneously, on the take-up side, the extended normally-open contact KA4-3 of the low-voltage intermediate relay KA4 closes, connecting to the intermediate controller KA5 on the take-up side. Contact KA5-1 of relay KA5 opens, and contact KA5-2 closes, disconnecting the speed reference signal of the take-up machine and setting it to zero. At the same time, the normally-closed contact KA5-3 of relay KA5 disconnects the output of the storage tension controller.

[0012] S4. The immediate shutdown control processing in step S3 effectively avoids the situation in the current state, especially when the line is broken, because the linkage input signal is out of control and people do not arrive at the scene in time, the main machine continues to extrude the rubber material, the traction continues to pull the broken line to the take-up position, the storage line tension continues to drive the tension wheel to run backward, the tension wheel runs backward and drives the linkage potentiometer on it, causing the take-up speed given signal to reach the fastest in a short time, and drives the broken line to be thrown out of the production line, causing safety hazards and expanding the scope of the fault, and greatly delaying the next production resumption time. The automatic shutdown processing of the broken line, especially when no one is on site, avoids the occurrence of the above situation, allowing the operator to calmly carry out subsequent processing and restart the machine.

[0013] Furthermore, the subsequent processing method of step S4 is to confirm the site, and after the entire line automatically shuts down, continue to shut down the wire storage tension and wire taking-up on site, and reprocess the wire that remains near the abnormality or breakpoint due to timely shutdown, and then press the reset button with one click to restart.

[0014] The technical effects of the present invention are mainly reflected in the following aspects: by re-planning the internal central control circuit board, improving the installation method of components, while retaining the original operation method unchanged, and retaining the original alarm, adding a one-button selection alarm operation plus shutdown mode to simultaneously meet the production requirements of various wires including single fire-resistant wires. The requirement of no alarm conditions when starting the machine for deviation adjustment can be achieved through the start-up linkage of feedback control. The two systems of feedback control and line break detection can be designed together, and the original line break detection system can be concentrated in the feedback control device. On the basis of maintaining the original functions, the wiring is simplified and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main circuit for wire diameter detection and control of the present invention;

[0016] Figure 2 This is a circuit diagram of the host, traction and injection machine cutting off the operation signal of the present invention;

[0017] Figure 3 It is a circuit diagram of the shutdown control processing of the present invention. DETAILED DESCRIPTION

[0018] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0019] In this embodiment, it should be understood that the terms "middle", "upper", "lower", "top", "right", "left end", "above", "back", "middle", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] In addition, in this specific embodiment, if the connection or fixing method between components is not specifically described, the connection or fixing method can be through bolt fixing or pin fixing, or pin shaft connection, etc. commonly used in the prior art, and therefore, it is not described in detail in this embodiment.

[0021] A control method for online detection of wire diameter, characterized in that: Figure 1As shown in the figure, the main control circuit for online detection of wire diameter includes detection input, control and output circuits, and is uniformly powered by a DC 24V power supply. It includes the following steps:

[0022] S1. When the "Feedback Enable" switch SA-2 is turned on and feedback control is enabled, the normally open contact of the "Feedback Control Output" closes, connecting the intermediate low-voltage relay KA2. The normally open contact KA2-1 of relay KA2 closes, and the wire diameter abnormality alarm enable indicator lights up. When the infrared ray of the diameter gauge detects abnormalities such as over-limit, concave-convex, or broken wire on the wire in progress, the diameter gauge immediately outputs an alarm signal to the control terminal DSP-3A, the alarm contact closes, and the control relay KA3 is turned on. At the same time, the normally open contact KA3-1 of relay KA3 closes and remains closed, and the extended output contact KA3-2 of relay KA3 closes, turning on the rotating alarm light, sounding an alarm, and prompting the user to start the machine for deviation adjustment.

[0023] S2. When the extruder is first started and adjusted, the wire diameter is unstable. The operator is operating at the console on the side of the extruder head and is in a manned state. The operator only needs to select the control switch to the "alarm" mode. When the diameter gauge detects an abnormal wire diameter, it only sends an alarm message to the operator on site, and does not proceed to the next step to perform automatic control processing due to the abnormal wire diameter;

[0024] S3. After the deviation adjustment is completed, select the control switch to "Alarm + Stop" mode. The system's automatic control and processing function for abnormal wire diameter is enabled. The control power indicator light is yellow, and the corresponding wire diameter status indicator light is green when the wire diameter is normal, and red when the wire diameter is abnormal. The specific steps are as follows:

[0025] S31. When an abnormality is detected, the corresponding relay KA3 is connected, the extended normally closed contact KA3-3 of the relay KA3 is disconnected, and the normally open contact KA3-4 is closed. Accordingly, the normal green indicator light goes out, and the abnormal red indicator light comes on. At the same time, the automatic control low-voltage intermediate relay KA4 is connected, and the normally open contact KA4-2 of the low-voltage intermediate relay KA4 is connected, and the self-locking is maintained;

[0026] S32, such as Figure 2 As shown in the figure, after the low-voltage intermediate relay KA4 is turned on, its extended normally open contact KA4-1 is energized, connecting the control input terminals E1 and E3 of the detection controller AFR. The normally open contact between the terminals 6 and 8 of the controller AFR is immediately disconnected, immediately cutting off the operating signals of the main machine, traction and injection machine; at the same time, on the take-up side, as shown in the figure, Figure 3As shown, the extended normally open contact KA4-3 of the low-voltage intermediate relay KA4 closes, connecting the intermediate controller KA5 on the take-up side. The contact KA5-1 of the relay KA5 opens, and the contact KA5-2 closes, disconnecting the speed reference signal of the take-up machine and setting it to zero. At the same time, the normally closed contact KA5-3 of the relay KA5 disconnects the output of the storage tension controller.

[0027] S4. Through the immediate shutdown control processing of step S3, it is effectively avoided that in the current state, especially when the line is broken, due to the loss of control of the linkage input signal and the failure of people to arrive at the scene in time, the main machine continues to extrude the rubber material, and the traction continues to pull the broken line to the take-up position. The storage line tension continues to drive the tension wheel to run backward, and the tension wheel runs backward to drive the linkage potentiometer on it, causing the speed of the take-up to reach the fastest in a short time, and drives the broken line out of the production line, causing safety hazards and expanding the scope of the fault, and greatly delaying the next production resumption time. Through the automatic shutdown processing of the broken line, especially when no one is on site, the above situation is avoided, so that the operator can calmly carry out subsequent processing, such as confirming the site, and continuing to shut down the storage line tension and take-up at the site after the entire line is automatically shut down, and after reprocessing the line that is kept near the abnormality or breakpoint due to the timely shutdown, press one button. Figure 1 Press the reset button to restart the device.

[0028] The technical effects of the present invention are mainly reflected in the following aspects: by re-planning the internal central control circuit board, improving the installation method of components, while retaining the original operation method unchanged, and retaining the original alarm, adding a one-button selection alarm operation plus shutdown mode to simultaneously meet the production requirements of various wires including single fire-resistant wires. The requirement of no alarm conditions when starting the machine for deviation adjustment can be achieved through the start-up linkage of feedback control. The two systems of feedback control and line break detection can be designed together, and the original line break detection system can be concentrated in the feedback control device. On the basis of maintaining the original functions, the wiring is simplified and the operation is convenient.

[0029] Of course, the above are only typical examples of the present invention. In addition, the present invention may also have many other specific implementation methods. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A control method for online detection of wire diameter, characterized in that: The main control circuit for online wire diameter detection includes detection input, control and output circuits, and is uniformly powered by a DC 24V power supply. It includes the following steps: S1. When the "Feedback Enable" switch SA-2 is turned on and feedback control is enabled, the normally open contact of the "Feedback Control Output" closes, connecting the intermediate low-voltage relay KA2. The normally open contact KA2-1 of relay KA2 closes, and the wire diameter abnormality alarm enable indicator lights up. When the infrared ray from the diameter gauge detects an over-limit, unevenness, or break in the wire being processed, the diameter gauge immediately outputs an alarm signal to the control terminal DSP-3A, closing the alarm contact and turning on the control relay KA3. Simultaneously, the normally open contact KA3-1 of relay KA3 closes and remains closed. The extended output contact KA3-2 of relay KA3 closes, turning on the rotating alarm light, sounding an alarm and prompting the user to perform deviation adjustment. S2. When the extruder is first started and adjusted, the wire diameter is unstable. The operator is operating at the console on the side of the extruder head and is in a manned state. The operator only needs to select the control switch to the "alarm" mode. When the diameter gauge detects an abnormal wire diameter, it only sends an alarm message to the operator on site, and does not proceed to the next step to perform automatic control processing due to the abnormal wire diameter; S3. After the deviation adjustment is completed, select the control switch to "Alarm + Stop" mode. The system's automatic control and processing function for abnormal wire diameter is enabled. The control power indicator light is yellow, and the corresponding wire diameter status indicator light is green when the wire diameter is normal, and red when the wire diameter is abnormal. The specific steps are as follows: S31. When an abnormality is detected, the corresponding relay KA3 is connected, the extended normally closed contact KA3-3 of the relay KA3 is disconnected, and the normally open contact KA3-4 is closed. Accordingly, the normal green indicator light goes out, and the abnormal red indicator light comes on. At the same time, the automatic control low-voltage intermediate relay KA4 is connected, and the normally open contact KA4-2 of the low-voltage intermediate relay KA4 is connected, and the self-locking is maintained; S32. After the low-voltage intermediate relay KA4 is turned on, its extended normally open contact KA4-1 is energized, connecting the control input terminals E1 and E3 of the detection controller AFR. The normally open contact between terminals 6 and 8 of the controller AFR is immediately disconnected, immediately cutting off the operating signals of the main machine, traction machine, and strip injection machine. At the same time, on the take-up side, the extended normally open contact KA4-3 of the low-voltage intermediate relay KA4 is energized, connecting the intermediate relay KA5 on the take-up side. The contact KA5-1 of the relay KA5 is disconnected, and the contact KA5-2 is energized, disconnecting the speed setting signal of the take-up machine and setting it to zero. At the same time, the normally closed contact KA5-3 of the relay KA5 disconnects the output of the storage tension controller. S4. The immediate shutdown control processing in step S3 effectively avoids the situation in which, when the line is broken, the linkage input signal is out of control and the person fails to arrive at the scene in time. The main machine continues to extrude the rubber material, and the traction continues to pull the broken line to the take-up position. The storage line tension continues to drive the tension wheel to run backward, and the tension wheel runs backward, driving the linkage potentiometer on it, causing the take-up speed given signal to reach the fastest in a short time, and driving the broken line to be thrown out of the production line, causing safety hazards and expanding the scope of the fault, and greatly delaying the next production resumption time. The automatic shutdown processing of the broken line, especially when no one is on site, avoids the occurrence of the above situation, allowing the operator to calmly carry out subsequent processing and restart the machine.

2. The control method for online detection of wire diameter according to claim 1, characterized in that: The subsequent processing method of step S4 is to confirm the site, and after the entire line is automatically shut down, continue to shut down the wire storage tension and wire take-up on site, and reprocess the wire that is kept near the abnormality or breakpoint due to the timely shutdown, and then press the reset button with one button to restart the machine.

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