Automatic stretcher and automatic stretching circuit thereof

Abstract

The utility model relates to the technical field of aluminum profile stretching, in particular to an automatic stretching machine and an automatic stretching circuit thereof, which comprise a stretching component, a distance measuring device, an interaction device, a controller, a front electromagnetic valve control device and a rear electromagnetic valve control device, wherein the interaction device sets stretching parameters of the stretching assembly, the distance measuring device measures the stretching parameters of the stretching assembly and feeds back the measured stretching parameters to the controller, and the controller compares the stretching parameters set by the interaction device with the stretching parameters fed back by the distance measuring device; and a signal is sent to the front electromagnetic valve control device and the rear electromagnetic valve control device according to a comparison result, so that starting and stopping of the forward electromagnetic valve and the backward electromagnetic valve are controlled, and finally the metal material is stretched by the stretching assembly. When the metal material stretching device is used for stretching a metal material, the complexity of manual operation is avoided, and the stretching accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum profile stretching, and more specifically, to an automatic stretching machine and its automatic stretching circuit. Background Art

[0002] Aluminum is a lightweight, corrosion-resistant, and good heat-conducting metal material. With the development of science and technology, aluminum materials are gradually applied to industrial, construction, and transportation fields. Currently, aluminum profiles are mainly processed by aluminum profile stretching machines. Most existing aluminum profile stretching machines are manually controlled. The aluminum profile stretching machine is equipped with a foot switch, and the foot switch controls the on-off of a relay to control the on-off of a hydraulic valve. Two hydraulic valves control the on-off of the oil circuits leading to both sides of the cylinder piston. When manually performing stretching operations, the operator steps on the forward foot switch or the backward foot switch to open or close the corresponding hydraulic valve, and the hydraulic oil enters the cylinder to push the piston to achieve the forward and backward movement of the stretching machine. However, using the existing aluminum profile stretching machine has the problems of requiring manual operation and being unable to meet the stretching accuracy. Summary of the Utility Model

[0003] Embodiments of the utility model provide an automatic stretching machine and its automatic stretching circuit to solve the technical problems of the existing stretching machine being manually operated and unable to meet the stretching accuracy.

[0004] An automatic stretching machine provided by an embodiment of the utility model includes: a stretching component, a distance measuring device, an interaction device, a controller, a front solenoid valve control device, and a rear solenoid valve control device;

[0005] The stretching component is provided with a forward solenoid valve and a backward solenoid valve for stretching metal materials;

[0006] The front solenoid valve control device is connected to the forward solenoid valve and the controller for controlling the start and stop of the forward solenoid valve;

[0007] The rear solenoid valve control device is connected to the backward solenoid valve and the controller for controlling the start and stop of the forward solenoid valve;

[0008] The interaction device is connected to the controller for setting the stretching parameters of the stretching component;

[0009] The distance measuring device is connected to the controller for detecting the stretching parameters of the stretching component and feeding back the data of the stretching parameters to the controller;

[0010] The controller has a polling function for comparing the stretching parameters set by the interaction device with the stretching parameters transmitted by the distance measuring device, and controlling the states of the front solenoid valve control device and the rear solenoid valve control device according to the comparison result.

[0011] Preferably, it further includes a front limit component and a rear limit component; wherein, the front limit component is used to detect whether the metal material is stretched to the front limit position, and when the metal material has been stretched to the front limit position, it feeds back a front limit signal to the controller, and the controller sends a signal to the front solenoid valve control device to disconnect the forward solenoid valve, so that the stretching component stops stretching forward;

[0012] The rear limit component is used to detect whether the metal material is stretched to the rear limit position, and when the metal material has been stretched to the rear limit position, it feeds back a rear limit signal to the controller, and the controller sends a signal to the rear solenoid valve control device to disconnect the reverse solenoid valve, so that the stretching component stops stretching backward.

[0013] Preferably, the front limit component includes a front limit detection device and a front limit signal device; wherein, the front limit detection device is used to detect whether the metal material is stretched to the front limit position; the front limit signal device is used to feed back a front limit signal when the metal material has been stretched to the front limit position to the controller;

[0014] The rear limit component includes a rear limit detection device and a rear limit signal device; wherein, the rear limit detection device is used to detect whether the metal material is stretched to the rear limit position; the rear limit signal device is used to feed back a rear limit signal when the metal material has been stretched to the rear limit position to the controller.

[0015] Preferably, the front solenoid valve control device, the rear solenoid valve control device, the front limit signal device and the rear limit signal device are all relays.

[0016] Preferably, the interaction device includes a touch screen; the touch screen has a password protection function and is provided with a stretching mode selection button for setting the stretching mode of the stretching component; the stretching mode includes stretching by ratio and stretching by length;

[0017] And / or, the stretching parameters include: stretching length, pre-stretching length, stretching holding time and relaxation time;

[0018] And / or, the distance measuring device includes: a laser displacement sensor;

[0019] And / or, the controller includes a PLC, and the distance measuring device is connected to the communication module of the PLC;

[0020] And / or, the automatic stretching machine further includes a DC power supply and a main control switch; the main control switch is connected to the DC power supply and is used to provide alternating current for the DC power supply; the DC power supply is used to convert the alternating current into direct current for powering the automatic stretching machine.

[0021] Preferably, the automatic stretching machine further includes: an industrial Ethernet switch;

[0022] The PLC and the interaction device are connected to the industrial Ethernet switch.

[0023] Preferably, there are multiple PLCs, and the multiple PLCs are all connected to the industrial Ethernet switch;

[0024] There are multiple interaction devices and they correspond to the PLCs one by one, and the multiple interaction devices are connected to the industrial Ethernet switch through network cables;

[0025] There are multiple stretching components and they correspond to the PLCs one by one, and are controlled by the PLCs;

[0026] One of the multiple PLCs is a master PLC, the master PLC has a polling function and is provided with the communication module, there are multiple ranging devices and they correspond to the PLCs one by one, and the multiple ranging devices are all connected to the communication module of the master PLC.

[0027] The beneficial effects of an automatic stretching machine provided by an embodiment of the present invention are as follows: When using the automatic stretching machine provided by the present invention, the ranging device and the interaction device are both connected to the controller. The stretching parameters of the stretching component are set through the interaction device, the ranging device measures the stretching parameters of the stretching component, and feeds back the measured stretching parameters to the controller. The controller compares the stretching parameters set by the interaction device with the stretching parameters fed back by the ranging device, and sends a signal to the front solenoid valve control device or the rear solenoid valve control device according to the comparison result, so as to control the start and stop of the forward solenoid valve or the backward solenoid valve, and finally realize the stretching of the metal material by the stretching component. When using this automatic stretching machine, only the stretching parameters of the metal material need to be set manually on the interaction device, and then the controller can automatically control the solenoid valve control device, and finally complete the stretching of the metal material by the stretching component, avoiding the cumbersome steps of manual operation of the stretching machine. At the same time, when stretching the metal material, the controller will compare the stretching parameters set by the interaction device with the stretching parameters fed back by the ranging device. When the set stretching parameters are consistent with the fed-back stretching parameters, the controller controls the solenoid valve control device to make the stretching component complete the stretching, reducing the stretching error of the metal material and ensuring the accuracy and precision of the stretching.

[0028] The present utility model further provides an automatic stretching circuit for the above-mentioned automatic stretching machine. The automatic stretching circuit includes: a control input circuit, a control output circuit, and a stretching main circuit. The stretching main circuit includes the stretching assembly, the ranging device, the interaction device, the controller, the front solenoid valve control device, and the rear solenoid valve control device that are electrically connected; the control input circuit is used to input the comparison result as a control input signal to the controller; the controller is used to feedback and control an output signal according to the control input signal, and the control output circuit is used to send the control output signal to the front solenoid valve control device and the rear solenoid valve control device. The front solenoid valve control device and the rear solenoid valve control device are respectively used to control the start and stop of the forward solenoid valve and the backward solenoid valve in the stretching assembly.

[0029] Preferably, in the stretching main circuit, the interaction device, the ranging device, and the controller are all electrically connected to the power supply line, and the ranging device is electrically connected to the controller. The forward solenoid valve and the front solenoid valve control device are connected in series to form a forward line and are connected to the power supply line. The backward solenoid valve and the rear solenoid valve control device are connected in series to form a backward line and are connected to the power supply line;

[0030] The controller includes a communication module and a CPU module. The control input circuit includes: an input common terminal, a forward signal terminal, a backward signal terminal, a start signal terminal, and a backward signal terminal provided on the communication module; wherein, the input common terminal is electrically connected to the low-level line in the power supply line; the forward signal terminal is electrically connected to the high-level line in the power supply line through a forward push-button switch; the backward signal terminal is electrically connected to the high-level line in the power supply line through a backward push-button switch; the start signal terminal is electrically connected to the high-level line in the power supply line through a start push-button switch; the stop signal terminal is electrically connected to the high-level line in the power supply line through a stop push-button switch;

[0031] The control output circuit includes a first output common terminal, a second output common terminal, a forward output terminal, and a backward output terminal provided on the CPU; wherein, the first output common terminal is electrically connected to the high-level line in the power supply line; the second output common terminal is electrically connected to the low-level line in the power supply line; the forward output terminal is electrically connected to the high-level line in the power supply line through the front solenoid valve control device; the backward output terminal is electrically connected to the high-level line in the power supply line through the rear solenoid valve control device.

[0032] Preferably, in the stretching main circuit, a front limit detection device and a front limit signal device are connected in series to form a front limit line and are connected to the power supply line; a rear limit detection device and a rear limit signal device are connected in series to form a rear limit line and are connected to the power supply line;

[0033] The control input circuit further includes a front limit signal terminal and a rear limit signal terminal provided on the communication module; wherein, the front limit signal terminal is electrically connected to the high-level line in the power supply line through the front limit signal device; the rear limit signal terminal is electrically connected to the high-level line in the power supply line through the rear limit signal device.

[0034] The beneficial effect of the automatic stretching circuit provided by the embodiment of the present invention lies in: according to the stretching main circuit, the connections among the stretching assembly, the distance measuring device, the interaction device, the controller, the front solenoid valve control device and the rear solenoid valve control device are set. The interaction device sets the stretching parameters, the distance measuring device measures the stretching parameters, the controller compares whether the set stretching parameters are consistent with the measured stretching parameters. The control input circuit is used to convert the comparison result of the controller into a control input signal, and the control output circuit is used to convert the control input signal into a control output signal and send it to the front solenoid valve control device and the rear solenoid valve control device, so as to realize the start and stop of controlling the forward solenoid valve or the backward solenoid valve, and finally realize the stretching of the metal material by the stretching assembly, avoiding the cumbersome manual operation. The controller's comparison ensures the stretching accuracy. For the specific details, please refer to the beneficial effects of the above automatic stretching machine and will not be elaborated here. Description of the Drawings

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0036] Figure 1 It is a schematic structural diagram of an automatic stretching machine provided by an embodiment of the present invention.

[0037] Figure 2 It is a schematic diagram of the interaction device of an automatic stretching machine provided by an embodiment of the present invention.

[0038] Figure 3 It is a schematic structural diagram of the stretching main circuit of an automatic stretching machine provided by an embodiment of the present invention.

[0039] Figure 4 It is a schematic structural diagram of the control input circuit of an automatic stretching machine provided by an embodiment of the present invention.

[0040] Figure 5 It is a schematic structural diagram of the control output circuit of an automatic stretching machine provided by an embodiment of the present invention.

[0041] Description of the drawing reference numerals:

[0042] 1 - Distance measuring device; 2 - Interaction device; 3 - Controller; 4 - Industrial Ethernet switch. Detailed implementation manners

[0043] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0044] The present utility model will be further described in detail below through specific implementation examples in conjunction with the drawings.

[0045] As Figure 1 shown, an embodiment of the present utility model provides an automatic stretching machine, including: a stretching assembly, a distance measuring device 1, an interaction device 2, a controller 3, a front solenoid valve control device, and a rear solenoid valve control device; wherein, the stretching assembly is provided with a forward solenoid valve and a backward solenoid valve for stretching metal materials; the front solenoid valve control device is connected to the forward solenoid valve and the controller 3 for controlling the start and stop of the forward solenoid valve; the rear solenoid valve control device is connected to the backward solenoid valve and the controller 3 for controlling the start and stop of the forward solenoid valve;

[0046] The interaction device 2 is connected to the controller 3 and is provided with an interaction program for setting the stretching parameters of the stretching assembly; the distance measuring device 1 is connected to the controller 3 for detecting the stretching parameters of the stretching assembly and feeding back the data of the stretching parameters to the controller 3; the controller 3 is provided with a control program and a MODBUS polling function program, having a polling function for comparing the stretching parameters set by the interaction device 2 with the stretching parameters transmitted by the distance measuring device 1, and controlling the states of the front solenoid valve control device and the rear solenoid valve control device according to the comparison result.

[0047] The beneficial effects of an automatic stretching machine provided by an embodiment of the present utility model are as follows: When using the automatic stretching machine provided by the present utility model, the distance measuring device and the interaction device are both connected to the controller. The stretching parameters of the stretching component are set through the interaction device, and the distance measuring device measures the stretching parameters of the stretching component and feeds back the measured stretching parameters to the controller. The controller compares the stretching parameters set by the interaction device with the stretching parameters fed back by the distance measuring device. When the set stretching parameters are different from the fed-back stretching parameters, the controller sends a signal to the front solenoid valve control device or the rear solenoid valve control device, thereby controlling the start of the forward solenoid valve and the backward solenoid valve. When the set stretching parameters are the same as the fed-back stretching parameters, the controller sends a signal to the front solenoid valve control device or the rear solenoid valve control device, thereby controlling the stop of the forward solenoid valve and the backward solenoid valve. Finally, the stretching component stretches the metal material, such as aluminum profiles. When using this automatic stretching machine, only the stretching parameters of the metal material need to be set manually through the interaction device, and then the controller can automatically control the solenoid valve control device, and finally complete the stretching of the metal material by the stretching component, avoiding the cumbersome steps of manual operation of the stretching machine. At the same time, when stretching the metal material, the controller will compare the stretching parameters set by the interaction device with the stretching parameters fed back by the distance measuring device. When the set stretching parameters are consistent with the fed-back stretching parameters, the controller controls the solenoid valve control device to make the stretching component complete the stretching, reducing the stretching error of the metal material and ensuring the accuracy and precision of the stretching.

[0048] In an embodiment of the present utility model, a front limit component and a rear limit component are further included; wherein, the front limit component is used to detect whether the metal material is stretched to the front limit position. When the metal material has been stretched to the front limit position, the front limit signal is fed back to the controller 3, and the controller 3 sends a signal to the front solenoid valve control device to disconnect the forward solenoid valve, that is, to control the solenoid valve to stop, so that the stretching component stops stretching forward;

[0049] The rear limit component is used to detect whether the metal material is stretched to the rear limit position. When the metal material has been stretched to the rear limit position, the rear limit signal is fed back to the controller 3, and the controller 3 sends a signal to the rear solenoid valve control device to disconnect the backward solenoid valve, so that the stretching component stops stretching backward;

[0050] By setting the front limit component and the rear limit component, in the case where the lengths of the metal materials are different and their stretching degrees are different, it is possible to avoid the situation where the stretching component continues to stretch when it has been stretched to the front limit position or the rear limit position, but the set stretching parameters of the metal material have not been reached, reducing the occurrence of damage to the stretching component, ensuring the service life of the automatic stretching machine, and reducing the equipment maintenance cost.

[0051] In the embodiment of the present utility model, the front limit component includes a front limit detection device and a front limit signal device; wherein, the front limit detection device is used to detect whether the metal material is stretched to the front limit position; the front limit signal device is used to feedback the front limit signal when the metal material is stretched to the front limit position to the controller 3;

[0052] The rear limit component includes a rear limit detection device and a rear limit signal device; wherein, the rear limit detection device is used to detect whether the metal material is stretched to the rear limit position; the rear limit signal device is used to feedback the rear limit signal when the metal material is stretched to the rear limit position to the controller 3.

[0053] In the embodiment of the present utility model, the front solenoid valve control device, the rear solenoid valve control device, the front limit signal device and the rear limit signal device are all relays. The relay contacts are reliable, and the on-off of the relay can be controlled by relying on the coil of the relay, which is flexible to use.

[0054] In the embodiment of the present utility model, the interaction device 2 includes a touch screen; the touch screen has a password protection function and is provided with a stretching mode selection button for setting the stretching mode of the stretching component; the stretching mode includes stretching by ratio and stretching by length; the stretching parameters include: stretching length, pre-stretching length, stretching holding time and relaxation time;

[0055] Refer to Figure 2 As shown in the schematic diagram of the interaction device of an automatic stretching machine. Specifically, a touch screen is used as the interaction device 2, and a touch screen program is set therein. The touch screen has a stretching mode selection button, and the available stretching modes include stretching by ratio and stretching by length to meet different process requirements. When the stretching by length mode is selected, the length to be stretched is set at the stretching length set value, and the system will stretch the metal material according to the set length; when the stretching by ratio mode is selected, the stretching ratio to be stretched is set at the stretching ratio set value, and the system will stretch the metal material according to the set stretching ratio. And when the stretching by ratio mode is selected, there is a password protection function. To modify the parameters set in the stretching by ratio mode, it is necessary to click the permission login button and enter the account password to make the modification, so as to prevent unauthorized personnel from modifying the parameters and protect the stretching of the metal material; at the same time, the touch screen can also set the pre-stretching length parameter, so that the stretching component first completes the pre-stretching action and then enters the stretching state, which is used to avoid the problem of insufficient stretching length caused by the bending of the metal material; the touch screen can also set the stretching protection time and the relaxation time. Setting the stretching holding time and the relaxation time can meet the different requirements of different metal materials for the stretching process and satisfy the production tasks of various products; the touch screen is also provided with stretching fault alarms, relaxation fault alarms and other functions;

[0056] The ranging device 1 includes: a laser displacement sensor. The selected laser displacement sensor has a relatively high precision, with a measurement error less than or equal to ±1 mm, and supports MODBUS RTU communication. This can ensure fast measurement while ensuring the accuracy of the stretching precision, and feedback the detected real-time stretching parameters to the controller 3 during the operation of the automatic stretching machine to achieve closed-loop control;

[0057] The controller 3 includes a PLC; the ranging device 1 is connected to the communication module of the PLC; the ranging device 1 is connected to the communication module of the PLC. Specifically, CM1241 is selected as the communication module, which can achieve fast and high-performance data exchange;

[0058] The automatic stretching machine further includes a DC power supply and a main control switch; the main control switch is connected to the DC power supply and is used to provide alternating current for the DC power supply; the DC power supply is used to convert alternating current into direct current to supply power to the automatic stretching machine; whether to provide alternating current to the DC power supply is controlled by the main control switch. The DC power supply converts alternating current into direct current, maintains the stability of the voltage, and supplies it to the automatic stretching machine to make it operate.

[0059] In the embodiment of the present utility model, it further includes: an industrial Ethernet switch 4; the PLC and the interaction device 2 are connected to the industrial Ethernet switch 4. As Figure 1 shown, the interaction device 2 is not directly connected to the PLC, but is connected to the industrial Ethernet switch 4 through a network cable. The PLC is also connected to the industrial Ethernet switch 4 through a network cable, and data exchange between the two is carried out through the industrial Ethernet switch 4.

[0060] In the embodiment of the present utility model, there are multiple PLCs, and multiple PLCs are all connected to the industrial Ethernet switch 4; there are multiple interaction devices 2 and they correspond to the PLCs one by one, and multiple interaction devices 2 are connected to the industrial Ethernet switch 4 through network cables; there are multiple stretching components and they correspond to the PLCs one by one and are controlled by the PLCs; one of the multiple PLCs is a main PLC, the main PLC has a polling function and is equipped with a communication module, there are multiple ranging devices 1 and they correspond to the PLCs one by one, and multiple ranging devices 1 are all connected to the communication module of the main PLC;

[0061] As Figure 1As shown, specifically, three PLCs are connected to the industrial Ethernet switch 4 via network cables. One main PLC is selected to set up a communication module. Specifically, CM1241 is selected as the communication module, and programs related to the MODBUS polling function are set in the main PLC for data transmission and control between different devices. PLC programs are written in the three PLCs for comparing stretching parameters and controlling the solenoid valve control device; there are three stretching components (not shown in the figure), corresponding to the PLCs one by one and controlled by their respective PLCs; there are three interaction devices 2, for example, touch screens, connected to the industrial Ethernet switch 4 via network cables and corresponding to the three PLCs one by one, used to set the stretching parameters of their respective corresponding stretching components; there are three distance measuring devices 1, for example, laser displacement sensors, corresponding to the three PLCs one by one, used to feed back the stretching parameters of the stretching components they measure to their respective corresponding PLCs; based on the industrial Ethernet switch for PROFINET networking, the three interaction devices 2 respectively set the stretching parameters of the three stretching components, the three distance measuring devices 1 respectively measure the stretching parameters of the three stretching machines, and transmit the measured stretching parameters of each stretching machine back to the main PLC. The industrial Ethernet switch 4 performs PROFINET networking to write the stretching parameter data collected by the main PLC into the corresponding PLC. Each PLC compares the stretching parameters and controls each stretching component to complete the stretching of the metal material. Connecting different devices through an industrial Ethernet switch 4 saves the cost of communication cables and CM1241 modules and also reduces the construction volume of laying communication cables.

[0062] The present utility model also provides an automatic stretching circuit for the above automatic stretching machine, controlling the control input circuit, the control output circuit, and the stretching main circuit. The stretching main circuit includes a stretching component, a distance measuring device 1, an interaction device 2, a controller 3, a front solenoid valve control device, and a rear solenoid valve control device connected electrically; the control input circuit is used to input the comparison result as a control input signal into the controller 3; the controller 3 is used to feedback a control output signal according to the control input signal, the control output circuit is used to send the control output signal to the front solenoid valve control device and the rear solenoid valve control device, and the front solenoid valve control device and the rear solenoid valve control device are respectively used to control the start and stop of the forward solenoid valve and the backward solenoid valve in the stretching component;

[0063] The beneficial effects of an automatic stretching circuit provided by an embodiment of the present utility model are as follows: According to the stretching main circuit, the connections among the stretching assembly, the distance measuring device, the interaction device, the controller, the front solenoid valve control device, and the rear solenoid valve control device are set. The interaction device sets the stretching parameters, the distance measuring device measures the stretching parameters, the controller compares whether the set stretching parameters are consistent with the measured stretching parameters, and the control input circuit is used to input the comparison result as a control input signal to the controller. The controller feeds back a control output signal according to the control input signal, and the control output circuit sends the control output signal to the front solenoid valve control device and the rear solenoid valve control device. The front solenoid valve control device and the rear solenoid valve control device are respectively used to control the start and stop of the forward solenoid valve and the backward solenoid valve in the stretching assembly, and finally the stretching of the metal material by the stretching assembly is realized, avoiding the cumbersome manual operation. The comparison by the controller ensures the stretching accuracy. For the specific details, see the beneficial effects of the above automatic stretching machine and will not be elaborated here.

[0064] In an embodiment of the present utility model, in the stretching main circuit, the interaction device 2, the distance measuring device 1, and the controller 3 are all electrically connected to the power supply line, and the distance measuring device 1 is electrically connected to the controller 3. The forward solenoid valve and the front solenoid valve control device are connected in series to form a forward line and are connected to the power supply line, and the backward solenoid valve and the rear solenoid valve control device are connected in series to form a backward line and are connected to the power supply line;

[0065] Specifically, refer to Figure 3 the structural schematic diagram of the stretching main circuit of an automatic stretching machine as shown. A PLC is selected as the controller 3, a touch screen is used as the interaction device 2, and a laser displacement sensor is used as the distance measuring device 1. The power supply line is connected to an AC power supply, and a main control switch QF1 is provided to supply power to a DC power supply V1. A fuse FU3 is provided on the power supply line of the DC power supply V1, and the power supply line is connected to the PLC to supply power to the PLC. Among them, a fuse FU1 is provided on the connection line between the CPU module of the PLC and the high-level line of the DC power supply V1. A network interface X1 of the CPU is also provided on the line, and a terminal block with 1 - 10 nodes is provided; The power supply line of the DC power supply V1 is also connected to the touch screen, that is, the HMI module, and a fuse FU2 is provided on the connection line between the HMI module and the high-level line of the DC power supply V1;

[0066] The power supply line of the DC power supply V1 is also connected in parallel with the forward line and the backward line. Among them, a series-connected forward solenoid valve Y1 and a front solenoid valve control device (i.e., a relay K1) are provided on the forward line, and a series-connected backward solenoid valve Y2 and a rear solenoid valve control device (i.e., a relay K2) are provided on the backward line; The power supply line of the DC power supply V1 also supplies power to the laser displacement sensor, and the laser displacement sensor is connected to the communication module (i.e., CM1241) of the PLC.

[0067] The controller includes a communication module and a CPU module. The control input circuit includes an input common terminal, a forward signal terminal, a reverse signal terminal, a start signal terminal, and a stop signal terminal provided in the communication module. Among them, the input common terminal is electrically connected to the low-level wire in the power supply line; the forward signal terminal is electrically connected to the high-level wire in the power supply line through a forward push-button switch; the reverse signal terminal is electrically connected to the high-level wire in the power supply line through a reverse push-button switch; the start signal terminal is electrically connected to the high-level wire in the power supply line through a start push-button switch; the stop signal terminal is electrically connected to the high-level wire in the power supply line through a stop push-button switch;

[0068] Specifically, refer to the Figure 4 structural schematic diagram of the control input circuit of an automatic stretching machine as shown. The control input circuit is the communication module (i.e., CM1241) of the PLC. The input common terminal, i.e., the 1M terminal, is connected to the low-level wire in the power supply line. The control input circuit has four input signal terminals. The forward signal terminal, i.e., I0.0, is electrically connected to the high-level wire in the power supply line through a forward push-button switch S1. The forward push-button switch S1 is a normally open switch, and closing represents a forward signal and the forward push-button indicator light is on. The reverse signal terminal, i.e., I0.1, is electrically connected to the high-level wire in the power supply line through a reverse push-button switch S2. The reverse push-button switch S2 is a normally open switch, and closing represents a reverse signal and the reverse push-button indicator light is on. The start signal terminal, i.e., I0.2, is electrically connected to the high-level wire in the power supply line through a start push-button switch S3. The start push-button switch S3 is a normally open switch, and closing represents a start signal and the start push-button indicator light is on. The stop signal terminal, i.e., I0.3, is electrically connected to the high-level wire in the power supply line through a stop push-button switch S4. The stop push-button switch S4 is a normally closed switch, and closing represents a stop signal and the stop push-button indicator light is on. The control input circuit also has two spare input signal terminals. The forward push-button indicator light, the reverse push-button indicator light, the start push-button indicator light, and the stop push-button indicator light are all provided in the control cabinet of the automatic stretching machine to display the working state of the automatic stretching machine.

[0069] The control output circuit includes a first output common terminal, a second output common terminal, a forward output terminal, and a reverse output terminal provided in the CPU. Among them, the first output common terminal is electrically connected to the high-level wire in the power supply line; the second output common terminal is electrically connected to the low-level wire in the power supply line; the forward output terminal is electrically connected to the high-level wire in the power supply line through the front solenoid valve control device; the reverse output terminal is electrically connected to the high-level wire in the power supply line through the rear solenoid valve control device;

[0070] Specifically, refer to the Figure 5Schematic diagram of the control output circuit of an automatic stretching machine shown. The control output circuit is the CPU module of the PLC. The first output common terminal, i.e., the 3L terminal, is electrically connected to the high-level line in the power supply circuit; the second output common terminal, i.e., the 3M terminal, is electrically connected to the low-level line in the power supply circuit. Under normal conditions, the connection of 3L and 3M represents the stop state; the forward output terminal, i.e., the Q0.0 terminal, is electrically connected to the high-level line in the power supply circuit through the forward solenoid valve control device (i.e., the coil of relay K1). When the PLC receives a forward signal, the coil of relay K1 is energized. As Figure 3 shown, the normally open point of relay K1 closes, and the forward solenoid valve Y1 is activated to control the stretching component to stretch forward; the backward output terminal, i.e., the Q0.1 terminal, is electrically connected to the high-level line in the power supply circuit through the backward solenoid valve control device (i.e., the coil of relay K2). When the PLC receives a backward signal, the coil of relay K2 is energized. As Figure 3 shown, the normally open point of relay K2 closes, and the backward solenoid valve Y2 is activated to control the stretching component to stretch backward; the control output circuit also has six spare output signal terminals.

[0071] In the embodiment of the present invention, in the stretching main circuit, the front limit detection device and the front limit signal device are connected in series to form a front limit line and are connected to the power supply circuit; the rear limit detection device and the rear limit signal device are connected in series to form a rear limit line and are connected to the power supply circuit;

[0072] Specifically, as Figure 3 shown, the power supply circuit is also connected in parallel with the front limit line and the rear limit line. The front limit line is provided with a series-connected front limit detection device (i.e., the front limit switch LS1) and a front limit signal device (i.e., relay K3). The rear limit line is provided with a series-connected rear limit detection device (i.e., the rear limit switch LS2) and a rear limit signal device (i.e., relay K4). Among them, the front limit switch LS1 and the rear limit switch LS2 are respectively arranged at the front limit position and the rear limit position of the stretching component.

[0073] The control input circuit also includes a front limit signal terminal and a rear limit signal terminal provided on the communication module; among them, the front limit signal terminal is electrically connected to the high-level line in the power supply circuit through the front limit signal device; the rear limit signal terminal is electrically connected to the high-level line in the power supply circuit through the rear limit signal device;

[0074] Specifically, as Figure 4 shown, in the control input circuit, the front limit signal terminal, i.e., I0.4, is electrically connected to the high-level line in the power supply circuit through the front limit signal device (i.e., the normally open switch part of relay K3). The closing of the normally open switch of relay K3 represents the front limit signal. As Figure 3As shown, when the front limit line touches the front limit switch LS1, the coil of the relay K3 is energized, and the normally open switch of the relay K3 closes, feeding back the front limit signal to the PLC. The PLC controls the forward solenoid valve Y1 to stop and triggers an alarm on the touch screen. The rear limit signal terminal, i.e., I0.5, is electrically connected to the high-level line in the power supply circuit through the rear limit signal device (i.e., the normally open switch part of the relay K4). The closing of the normally open switch of the relay K4 represents the rear limit signal. As Figure 3 shown, when the rear limit line touches the rear limit switch LS2, the coil of the relay K4 is energized, and the normally open switch of the relay K4 closes, feeding back the rear limit signal to the PLC. The PLC controls the reverse solenoid valve Y2 to stop and triggers an alarm on the touch screen.

[0075] In the embodiment of the present invention, when the provided automatic stretching machine and its automatic stretching circuit are in use, only manual setting of stretching parameters on the interaction device 2 is required. Subsequently, the automatic stretching machine can complete the stretching of metal materials without continuous manual operation, avoiding the cumbersome situation of manual operation of the existing stretching machine, liberating labor, saving labor costs, and improving work efficiency. Moreover, during the stretching process, the controller 3 will compare the stretching parameters set by the interaction device 2 with the stretching parameters fed back by the distance measuring device 1. Only when the stretching parameters of the two are consistent will the stretching be completed, ensuring the stretching accuracy, improving the performance of the stretching machine, reducing the occurrence of stretching waste. At the same time, the provided front limit component and rear limit component prevent the stretching component from continuing to stretch when it has reached the front limit position or the rear limit position, avoiding damage to the stretching component, saving equipment maintenance costs, and extending the service life of the equipment.

[0076] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, 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. Therefore, it should not be construed as a limitation to the present invention.

[0077] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the term "installation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic stretching machine, characterized in that: The automatic stretching machine comprises: a stretching component, a distance measuring device (1), an interaction device (2), a controller (3), a front solenoid valve control device and a rear solenoid valve control device; The stretching assembly is provided with a forward solenoid valve and a backward solenoid valve for stretching the metal material; The front solenoid valve control device is connected to the forward solenoid valve and the controller (3) and is used to control the start and stop of the forward solenoid valve; The rear solenoid valve control device is connected to the rear solenoid valve and the controller (3) and is used to control the start and stop of the forward solenoid valve; The interactive device (2) is connected to the controller (3) and is used to set the stretching parameters of the stretching component; The distance measuring device (1) is connected to the controller (3) and is used to detect the stretching parameters of the stretching component and feed back the data of the stretching parameters to the controller (3); The controller (3) has a polling function for comparing the stretching parameters set by the interactive device (2) with the stretching parameters transmitted by the distance measuring device (1), and controlling the states of the front solenoid valve control device and the rear solenoid valve control device according to the comparison result.

2. The automatic stretching machine according to claim 1, characterized in that: It also includes a front limit assembly and a rear limit assembly; wherein the front limit assembly is used to detect whether the metal material has been stretched to the front limit position, and when the metal material has been stretched to the front limit position, the front limit signal is fed back to the controller (3), and the controller (3) sends a signal to the front solenoid valve control device to disconnect the forward solenoid valve, so that the stretching assembly stops stretching forward; The rear limit assembly is used to detect whether the metal material has been stretched to the rear limit position. When the metal material has been stretched to the rear limit position, a rear limit signal is fed back to the controller (3). The controller (3) sends a signal to the rear solenoid valve control device to disconnect the rear solenoid valve, so that the stretching assembly stops stretching backward.

3. The automatic stretching machine according to claim 2, characterized in that: The front limit assembly comprises a front limit detection device and a front limit signal device; wherein the front limit detection device is used to detect whether the metal material is stretched to the front limit position; the front limit signal device is used to feed back the front limit signal when the metal material has been stretched to the front limit position to the controller (3); The rear limit assembly comprises a rear limit detection device and a rear limit signal device; wherein the rear limit detection device is used to detect whether the metal material is stretched to the rear limit position; and the rear limit signal device is used to feed back a rear limit signal to the controller (3) when the metal material has been stretched to the rear limit position.

4. The automatic stretching machine according to claim 3, characterized in that: The front solenoid valve control device, the rear solenoid valve control device, the front limit signal device and the rear limit signal device are all relays.

5. The automatic stretching machine according to claim 1, characterized in that: The interactive device (2) comprises a touch screen; the touch screen has a password protection function and is provided with a stretching mode selection button for setting the stretching mode of the stretching component; the stretching mode comprises stretching by ratio and stretching by length; And / or, the stretching parameters include: stretching length, pre-stretching length, stretching holding time and relaxation time; And / or, the distance measuring device (1) comprises: a laser displacement sensor; And / or, the controller (3) comprises a PLC, and the distance measuring device (1) is connected to a communication module of the PLC; And / or, the automatic stretching machine also includes a DC power supply and a main control switch; the main control switch is connected to the DC power supply and is used to provide AC power to the DC power supply; the DC power supply is used to convert the AC power into DC power for powering the automatic stretching machine.

6. The automatic stretching machine according to claim 5, characterized in that: Also includes: Industrial Ethernet switches (4); The PLC and the interactive device (2) are connected to the industrial Ethernet switch (4).

7. The automatic stretching machine according to claim 6, characterized in that: There are multiple PLCs, and the multiple PLCs are connected to the industrial Ethernet switch (4); The interactive device (2) has a plurality of devices and corresponds one to one with the PLC, and the plurality of interactive devices (2) are connected to the industrial Ethernet switch (4) via a network cable; The stretching components have a plurality of components and correspond one to one with the PLC and are controlled by the PLC; A main PLC is provided among the plurality of PLCs, the main PLC has a polling function and is provided with the communication module, the distance measuring devices (1) are provided in plurality and correspond one to one with the PLCs, and the plurality of distance measuring devices (1) are all connected to the communication module of the main PLC.

8. An automatic stretching circuit, characterized in that: Used for the automatic stretching machine according to any one of claims 1 to 7, the automatic stretching circuit comprises: a control input circuit, a control output circuit and a stretching main circuit, the stretching main circuit comprises the electrically connected stretching component, the distance measuring device (1), the interactive device (2), the controller (3), the front solenoid valve control device and the rear solenoid valve control device; the control input circuit is used to input the comparison result as a control input signal to the controller (3); the controller (3) is used to feed back a control output signal according to the control input signal, and the control output circuit is used to send the control output signal to the front solenoid valve control device and the rear solenoid valve control device, and the front solenoid valve control device and the rear solenoid valve control device are used to control the start and stop of the forward solenoid valve and the backward solenoid valve in the stretching component respectively.

9. The automatic stretching circuit according to claim 8, characterized in that: In the stretching main circuit, the interactive device (2), the distance measuring device (1) and the controller (3) are all electrically connected to a power supply circuit, and the distance measuring device (1) is electrically connected to the controller (3); the forward solenoid valve and the front solenoid valve control device are connected in series to form a forward circuit and are connected to the power supply circuit; the backward solenoid valve and the rear solenoid valve control device are connected in series to form a backward circuit and are connected to the power supply circuit; The controller includes a communication module and a CPU module, and the control input circuit includes an input common terminal, a forward signal terminal, a backward signal terminal, a start signal terminal, a stop signal terminal and a backward signal terminal arranged on the communication module; wherein the input common terminal is electrically connected to a low-level line in the power supply circuit; the forward signal terminal is electrically connected to a high-level line in the power supply circuit through a forward button switch; the backward signal terminal is electrically connected to a high-level line in the power supply circuit through a backward button switch; the start signal terminal is electrically connected to a high-level line in the power supply circuit through a start button switch; and the stop signal terminal is electrically connected to a high-level line in the power supply circuit through a stop button switch; The control output circuit includes a first output common terminal, a second output common terminal, a forward output terminal and a backward output terminal arranged on the CPU; wherein the first output common terminal is electrically connected to a high level line in the power supply circuit; the second output common terminal is electrically connected to a low level line in the power supply circuit; the forward output terminal is electrically connected to the high level line in the power supply circuit through the front solenoid valve control device; the backward output terminal is electrically connected to the high level line in the power supply circuit through the rear solenoid valve control device.

10. The automatic stretching circuit according to claim 9, characterized in that: In the stretching main circuit, the front limit detection device and the front limit signal device are connected in series to form a front limit circuit and connected to the power supply circuit; the rear limit detection device and the rear limit signal device are connected in series to form a rear limit circuit and connected to the power supply circuit; The control input circuit also includes a front limit signal terminal and a rear limit signal terminal arranged on the communication module; wherein the front limit signal terminal is electrically connected to the high level line in the power supply circuit through the front limit signal device; and the rear limit signal terminal is electrically connected to the high level line in the power supply circuit through the rear limit signal device.

Images