Automatic cutting system and automatic cutting method

Abstract

The present invention relates to an automatic shearing system and an automatic shearing method for shearing products to be cut. The automatic shearing system includes a conveying mechanism for driving the linear motion of the products to be cut, a shearing mechanism arranged beside the conveying path of the products to be cut, and an execution controller for controlling the actions of the conveying mechanism and the shearing mechanism. The automatic shearing system also includes a processor, a start-stop switch, and a length measuring sensor for measuring the conveying length of the products to be cut. The shearing mechanism has an action feedback device. The start-stop switch, the length measuring sensor, and the action feedback device are all connected to the input end of the processor, and the output end of the processor is connected to the execution controller. The automatic shearing method is performed using the automatic shearing system of the present invention. The automatic shearing system and the automatic shearing method of the present invention can realize the automatic linkage control of the entire shearing work, reduce manual operations, greatly improve production efficiency, and ensure production quality.

Description

Technical Field

[0001] The present invention relates to the field of mechanical production and manufacturing, and in particular to an automatic shearing system and an automatic shearing method. Background Art

[0002] In the steel production line, the steel needs to be cut to length. The production units commonly used in steel production currently use different cutting methods for precision-cut steel and non-precision-cut steel. For non-precision-cut steel, the production unit conveys the steel in a straight line. When it is close to the fixed length during the conveying process, the steel conveying is decelerated, and when it reaches the fixed length, the shearing trolley performs the cutting operation. When the shearing is completed, the conveying line speed of the production unit is increased by manual control. For precision-cut steel, the original method of lifting and lowering the fixed-length baffle is used for fixed-length shearing. When the steel approaches the fixed-length baffle, the conveying line speed of the steel is reduced by manual control. When the steel collides with the fixed-length baffle at a low speed, the shearing trolley is lifted off the original position. After confirming that there is no gap between the steel and the fixed-length baffle, the shearing trolley is manually controlled to cut. When the shearing is completed, the conveying line speed of the production unit is increased by manual control. Since the entire shearing, as well as the deceleration and acceleration operation process of the steel conveying are manually completed, the efficiency is particularly low, and sometimes there are misoperations. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is to provide an automatic shearing system and an automatic shearing method with high labor efficiency.

[0004] To achieve the above-mentioned purpose, the present invention provides an automatic shearing system for shearing products to be cut. The automatic shearing system includes a conveying mechanism for driving the linear motion of the products to be cut, a shearing mechanism arranged beside the conveying path of the products to be cut, and an execution controller for controlling the actions of the conveying mechanism and the shearing mechanism. The automatic shearing system also includes a processor, a start-stop switch, and a length measuring sensor for measuring the conveying length of the products to be cut. The shearing mechanism has a motion feedback device. The start-stop switch, the length measuring sensor, and the motion feedback device are all connected to the input end of the processor, and the output end of the processor is connected to the execution controller.

[0005] Furthermore, it also includes a fixed-size baffle installed on the conveying path of the product to be cut, and a reset mechanism that drives the fixed-size baffle to move. The fixed-size baffle and the shearing mechanism are fixed to each other, and the fixed-size baffle is located in front of the shearing mechanism along the conveying direction of the product to be cut. The fixed-size baffle and the shearing mechanism can move along the conveying direction of the product to be cut, and move perpendicular to the conveying direction of the product to be cut.

[0006] Furthermore, it also includes a proximity switch, which is arranged in front of the shearing mechanism.

[0007] Preferably, the shearing mechanism comprises a shearing knife, and the shearing knife can be close to or away from the conveying path of the product to be cut.

[0008] Furthermore, it also includes a parameter input device connected to the input end of the processor, and the processor is a PLC controller.

[0009] Preferably, the length measuring sensor comprises a length measuring roller, and a photoelectric encoder mounted on the length measuring roller and rotating synchronously with the length measuring roller, and the photoelectric encoder is connected to a processor.

[0010] The present invention also provides an automatic shearing method, which is performed using the above-mentioned automatic shearing system. The automatic shearing method comprises the following steps:

[0011] S1. Turn on the processor and the length measuring sensor through the start-stop switch, wherein the processor is preset with a fixed length and a deceleration length; set the shearing mechanism to an initial position, wherein the shearing mechanism is in an initial state without performing a shearing action; place the product to be cut on the conveying mechanism, and align the end of the product to be cut with the shearing mechanism;

[0012] S2, the processor sends a start signal to the execution controller, the execution controller controls the conveying mechanism to start conveying the product to be cut, the product to be cut moves forward at the first stage speed, the length measuring sensor starts to measure the forward length of the product to be cut, and transmits the measurement signal to the processor, the processor calculates and determines the real-time forward length of the product to be cut according to the measurement signal;

[0013] S3, the processor determines the relationship between the real-time length and the fixed-length. When the real-time length = the fixed-length length – the deceleration length, the processor outputs a deceleration signal to the execution controller, and the execution controller drives the conveying mechanism to decelerate, and the product to be cut continues to move forward at the second stage speed;

[0014] S4, the processor determines the relationship between the real-time length and the fixed-length. When the real-time length = the fixed-length, the processor resets the calculated real-time length to zero and restarts the calculation; the shearing mechanism and the product to be cut are relatively stationary in the conveying direction; the processor sends a shearing signal to the execution controller, and the execution controller controls the shearing mechanism to perform the shearing action according to the shearing signal to cut the product to be cut; after the shearing is completed, the cut product is promptly removed from the conveying mechanism, and after the shearing mechanism completes the shearing action, the action feedback device transmits the feedback signal to the processor, and the processor sends an acceleration signal to the execution controller according to the feedback signal of the shearing mechanism, and the execution controller controls the conveying mechanism to accelerate according to the acceleration signal, and the product to be cut continues to move forward at the third stage speed; after the shearing is completed, the conveying mechanism is located at the initial position in step S1;

[0015] S5, repeating steps S3 to S4 to perform multiple shearing operations on the product to be cut.

[0016] Furthermore, in step S4, the method for making the shearing mechanism and the product to be cut relatively stationary in the conveying direction is: when the real-time length = the fixed length, the processor sends a stop signal to the execution controller, and the execution controller controls the conveying mechanism to stop conveying according to the stop signal, and the shearing mechanism remains stationary in the conveying direction.

[0017] Furthermore, the automatic shearing system further comprises a fixed-length baffle installed on the conveying path of the product to be cut, and a reset mechanism for driving the fixed-length baffle to move, the fixed-length baffle and the shearing trolley are fixed to each other, and the fixed-length baffle is located in front of the shearing mechanism along the conveying direction of the product to be cut, and the fixed-length baffle and the shearing mechanism can both move along the conveying direction of the product to be cut, and move perpendicularly to the conveying direction of the product to be cut; in the step S1, the fixed-length baffle is also set at an initial position, at which time the fixed-length baffle is located on the conveying path of the product to be cut, and the distance between the fixed-length baffle and the shearing mechanism along the conveying direction is equal to the fixed-length length; in the step S4, the method for making the shearing mechanism and the product to be cut relatively stationary in the conveying direction is: when the real-time length = the fixed-length length, the front end of the product to be cut hits the fixed-length baffle, pushing the fixed-length baffle and the shearing mechanism to move forward synchronously with the product to be cut; after the shearing is completed, the reset mechanism drives the fixed-length baffle and the shearing mechanism back to the initial position in step S1.

[0018] Furthermore, the processor also has a counting function; the step S1 also includes: setting the pre-cut number of branches in the processor and setting the number of cut branches to zero; the step S4 also includes: after the shearing mechanism completes a shearing action, the processor counts once and increases the number of cut branches by one; the step S5 also includes: when the number of cut branches counted by the processor is equal to the pre-cut number of branches, the processor outputs a stop signal to the execution controller, and the execution controller controls the conveying mechanism and the shearing mechanism to stop the action, and the entire shearing work stops.

[0019] As described above, the automatic shearing system and the automatic shearing method according to the present invention have the following beneficial effects:

[0020] The automatic cutting system is provided with a processor, a start-stop switch, a length measuring sensor and an action feedback device. When in use, the processor receives the signal from the start-stop switch to start and stop the entire automatic cutting system. The processor receives the signal from the length measuring sensor, so as to determine when to cut, and sends a signal to the execution controller, and controls the conveying action of the conveying mechanism and the shearing action of the conveying mechanism through the execution controller to realize the entire cutting work. After the shearing mechanism completes the shearing action, the action feedback device promptly feeds back the signal to the processor, and the processor can control the next action of the conveying mechanism and the shearing mechanism according to the feedback signal from the shearing mechanism. The automatic cutting system and automatic cutting method of the present invention can realize the automatic linkage control of the entire shearing work, reduce manual operation, greatly improve production efficiency, and ensure production quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the automatic cutting system in the present invention.

[0022] Figure 2 It is a schematic diagram of the working principle of the automatic shearing system in the present invention.

[0023] Component number description

[0024] 1 Products to be cut

[0025] 2 Conveying mechanism

[0026] 3 Shearing mechanism

[0027] 31 Shear knife

[0028] 32 Shearing Cart

[0029] 4 Execution Controller

[0030] 5 Processor

[0031] 51 Parameter Input

[0032] 52 Mode switch

[0033] 6 Length measurement sensor

[0034] 7 Proximity switch

[0035] 8 Start / Stop Switch

[0036] 9 Fixed-length baffle DETAILED DESCRIPTION

[0037] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0038] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0039] like Figure 1 and Figure 2 As shown, the present invention provides an automatic shearing system for shearing a product 1 to be cut. The automatic shearing system includes a conveying mechanism 2 for driving the product 1 to be cut to move linearly, a shearing mechanism 3 arranged beside the conveying path of the product 1 to be cut, and an execution controller 4 for controlling the actions of the conveying mechanism 2 and the shearing mechanism 3. The automatic shearing system also includes a processor 5, a start-stop switch 8, and a length measuring sensor 6 for measuring the conveying length of the product 1 to be cut. The shearing mechanism 3 has an action feedback device. The start-stop switch 8, the length measuring sensor 6, and the action feedback device are all connected to the input end of the processor 5, and the output end of the processor 5 is connected to the execution controller 4.

[0040] The basic working principle of the automatic cutting system involved in the present invention is as follows: the processor 5 has corresponding parameter settings, data calculation and processing, and communication functions. The processor 5 receives the signal from the start-stop switch 8 to start and stop the entire automatic cutting system. The processor 5 receives the signal from the length measurement sensor 6, so that it can judge when to cut, and sends a signal to the execution controller 4, and controls the conveying action of the conveying mechanism 2 and the shearing action of the conveying mechanism 2 through the execution controller 4 to realize the entire cutting work. After the shearing mechanism 3 completes the shearing action, the action feedback device promptly feeds back the signal to the processor 5, and the processor 5 can control the next action of the conveying mechanism 2 and the shearing mechanism 3 according to the feedback signal from the shearing mechanism 3. The automatic cutting system of the present invention can realize the automatic linkage control of the entire shearing work, which can greatly improve the production efficiency and ensure the production quality.

[0041] In the automatic shearing system of the present invention, the shearing mechanism 3 can be fixed or movable in the conveying direction of the product 1 to be cut. When the shearing action is not performed, the shearing mechanism 3 maintains a certain distance from the conveying path of the product 1 to be cut, which will not affect the conveying of the product 1 to be cut. When the shearing action is performed, the shearing mechanism 3 contacts the product 1 to be cut to cut the product 1 to be cut, and after the shearing action is completed, the shearing mechanism 3 returns to the state when the shearing action is not performed, which will not affect the continued conveying of the product 1 to be cut. The shearing mechanism 3 can be selected according to the type of product 1 to be cut. In this embodiment, if Figure 1 As shown, the shearing mechanism 3 includes a shearing knife 31. The shearing knife 31 can be close to or away from the conveying path of the product 1 to be cut, and can be used to shear products such as steel sections. After the cutting is completed, it can be retracted without affecting the conveying of the product 1 to be cut, and the action feedback device of the shearing mechanism 3 can send a feedback signal when the shearing knife 31 is retracted. Of course, in other embodiments, the shearing mechanism 3 can also adopt other types, such as laser cutting, flame cutting, etc., to cut different types of products 1 to be cut. The processor 5 can use many commonly used instruments with parameter setting, data processing and communication functions. Preferably, in this embodiment, the processor 5 is a PLC controller. The relevant parameters can be pre-set or set through a parameter input device 51 connected to the input end of the processor 5, so as to increase the scope of application of the automatic shearing system. Preferably, in this embodiment, Figure 1 and Figure 2 As shown, the parameter input device 51 uses a touch screen. By setting the parameters on the touch screen, it is easy to use and can be observed in real time. In this embodiment, the start-stop switch 8 includes a stop button and a start button. The execution controller 4 selects a suitable structure according to the shearing mechanism 3 and the conveying mechanism 2. When the execution controller 4 adopts an electrical control method, the output end of the processor 5 can be connected to several relays to convert the electrical signal transmitted by the processor into a signal corresponding to the execution controller 4.

[0042] The length measuring sensor 6 in the present invention is used to measure the conveying length of the product 1 to be cut during the conveying process, and transmit the corresponding measurement signal to the processor 5. Specifically, the length measuring sensor 6 can adopt various types of existing measuring instruments, and the measurement signal transmitted by the length measuring sensor 6 to the processor 5 can be directly a length signal, or the processor 5 can determine the real-time conveying length of the product 1 to be cut through corresponding calculations based on the measurement signal combined with relevant parameters set in the processor 5, which is specifically determined according to the type of length measuring sensor 6. As a preferred design, Figure 1 and Figure 2As shown, in this embodiment, the length measuring sensor 6 includes a length measuring roller, and a photoelectric encoder installed on the length measuring roller and rotating synchronously with the length measuring roller, and the photoelectric encoder is connected to the processor 5. When in use, the photoelectric encoder is turned on, and when the product 1 to be cut moves forward, the length measuring roller is in close contact with the product 1 to be cut and rotates, driving the photoelectric encoder to rotate. At this time, the measurement signal is a pulse signal. The processor 5 has a high-speed counter inside, which receives the pulse signal of the photoelectric encoder and continuously counts the number of pulses. The processor 5 automatically calculates the length of each pulse according to the pre-set length measuring roller diameter and the number of pulses of the photoelectric encoder for one rotation. Then, the number of pulses of the photoelectric encoder counted by the high-speed counter of the processor 5 multiplied by the length of each pulse is equal to the real-time length of the product. With the design of the length measuring roller and the photoelectric encoder, the measurement of the length measuring sensor 6 is more stable and reliable, with high precision, thereby improving the production quality.

[0043] As a preferred design, Figure 1 and Figure 2 As shown, the product 1 to be cut moves in the conveying direction (i.e. Figure 1 The left direction in the figure is the front of the product 1 to be cut. In this embodiment, the automatic shearing system further includes a fixed-length baffle 9 installed on the conveying path of the product 1 to be cut, and a reset mechanism for driving the fixed-length baffle 9 to move. The fixed-length baffle 9 and the shearing mechanism 3 are fixed to each other, and the fixed-length baffle 9 is located in front of the shearing mechanism 3 along the conveying direction of the product 1 to be cut. The fixed-length baffle 9 and the shearing mechanism 3 can move along the conveying direction of the product 1 to be cut, and can move perpendicular to the conveying direction of the product 1 to be cut. Specifically, as Figure 1 As shown, in this embodiment, the shearing mechanism 3 includes a shearing trolley 32, and the shearing knife 31 is installed on the shearing trolley 32 and moves with the shearing trolley 32. When the product 1 to be cut is a non-precision-sized product, the fixed-size baffle 9 is not used and the fixed-size baffle 9 is retracted. When the product 1 to be cut is a precision-sized product, the fixed-size baffle 9 is used. When in use, the fixed-size baffle 9 is located on the conveying path of the product 1 to be cut. During the conveying process of the product 1 to be cut, it will lean against the fixed-size baffle 9, pushing the fixed-size baffle 9 and the shearing mechanism 3 to move forward synchronously. By controlling the gap between the product 1 to be cut and the fixed-size baffle 9, the product 1 to be cut is accurately positioned. When the shearing action is completed, the reset mechanism drives the fixed-size baffle 9 and the shearing trolley 32 back to the initial position before colliding with the product 1 to be cut, thereby achieving reset.

[0044] As a preferred design, Figure 1 and Figure 2As shown, in this embodiment, a proximity switch 7 is also included, and the proximity switch 7 is arranged at a suitable position in front of the shearing mechanism 3. The specific arrangement position is determined according to the production requirements. When the product 1 to be cut pushes the shearing mechanism 3 to move forward synchronously and cut, when the shearing knife 31 of the shearing mechanism 3 is stuck with the product 1 to be cut, so that the shearing mechanism 3 and the product 1 to be cut cannot be separated, the product 1 to be cut will push the shearing mechanism 3 to continue to move forward. When the shearing mechanism 3 is close to the proximity switch 7, the proximity switch 7 transmits a proximity signal to the processor 5, so that the processor 5 can output a stop signal to the execution controller 4 according to the proximity signal, so that the execution controller 4 controls the automatic shearing system to stop working, thereby avoiding safety accidents during the working process.

[0045] The present invention also provides an automatic shearing method, which adopts the above-mentioned automatic shearing system and is performed in combination with the working principle of the automatic shearing system, and includes the following steps:

[0046] S1. Turn on the processor 5 and the length measuring sensor 6 through the start-stop switch 8. The processor 5 is preset with a fixed length and a deceleration length. Set the shearing mechanism 3 to an initial position, at which time the shearing mechanism 3 is in an initial state without performing a shearing action. Place the product 1 to be cut on the conveying mechanism 2, and align the end of the product 1 to be cut with the shearing mechanism 3.

[0047] S2, the processor 5 sends a start signal to the execution controller 4, the execution controller 4 controls the conveying mechanism 2 to start conveying the product 1 to be cut, the product 1 to be cut moves forward at the first stage speed, the length measuring sensor 6 starts to measure the length of the product 1 to be cut, and transmits the measurement signal to the processor 5, the processor 5 calculates and determines the real-time length of the product 1 to be cut according to the measurement signal;

[0048] S3, the processor 5 determines the relationship between the real-time length and the fixed length. When the real-time length = the fixed length - the deceleration length, the processor 5 outputs a deceleration signal to the execution controller 4, and the execution controller 4 drives the conveying mechanism 2 to decelerate, and the product 1 to be cut continues to move forward at the second stage speed;

[0049] S4, the processor 5 determines the relationship between the real-time length and the fixed length. When the real-time length = the fixed length, the processor 5 resets the calculated real-time length to zero and restarts the calculation; the shearing mechanism 3 and the product 1 to be cut are relatively stationary in the conveying direction; the processor 5 sends a shearing signal to the execution controller 4, and the execution controller 4 controls the shearing mechanism 3 to perform the shearing action according to the shearing signal and cuts the product 1 to be cut; after the shearing is completed, the cut product is promptly removed from the conveying mechanism 2, and after the shearing mechanism 3 completes the shearing action, the action feedback device transmits the feedback signal to the processor 5, and the processor 5 sends an acceleration signal to the execution controller 4 according to the feedback signal of the shearing mechanism 3, and the execution controller 4 controls the conveying mechanism 2 to accelerate according to the acceleration signal, and the product 1 to be cut continues to move forward at the third stage speed; after the shearing is completed, the conveying mechanism 2 is located at the initial position in step S1;

[0050] S5. Repeat steps S3 to S4 to perform multiple shearing operations on the product 1 to be cut.

[0051] When the automatic shearing system and the automatic shearing method of the present invention are used to shear the product 1 to be cut, how to make the shearing mechanism 3 and the product 1 to be cut relatively still in the conveying direction can be determined according to whether the product 1 to be cut is a precisely-set product. For precisely-set products and non-precisely-set products, the automatic shearing method has different operations, which are specifically divided into the following two situations:

[0052] A. When the product 1 to be cut is a non-precision-set-length product, the automatic shearing system used at this time may not have the set-length baffle 9, or may have the set-length baffle 9 but not use it. In the above step S4, when the real-time length = the set-length length, the processor 5 sends a stop signal to the execution controller 4, and the execution controller 4 controls the conveying mechanism 2 to stop conveying according to the stop signal, and the shearing mechanism 3 remains stationary in the conveying direction, so as to ensure that the shearing mechanism 3 and the product 1 to be cut are relatively stationary in the conveying direction, and then the shearing operation is performed. After the shearing is completed, the conveying mechanism 2 is kept at the initial position in step S1.

[0053] B. When the product 1 to be cut is a precisely-sized product, the size baffle 9 in this embodiment is used; in the above step S1, the size baffle 9 is also set to be in the initial position at the same time, and the size baffle 9 is located on the conveying path of the product 1 to be cut, and the distance between the size baffle 9 and the shearing mechanism 3 along the conveying direction is equal to the size length; in the above step S4, when the real-time length = the size length, the front end of the product 1 to be cut hits the size baffle 9, pushing the size baffle 9 and the shearing mechanism 3 to move forward synchronously with the product 1 to be cut; and after the shearing is completed, the reset mechanism drives the size baffle 9 and the shearing mechanism 3 back to the initial position in step S1.

[0054] Therefore, the automatic shearing system in this embodiment has two control modes, corresponding to the above-mentioned situation A and situation B, which can be respectively called the automatic stop shearing mode and the automatic deceleration shearing mode. Figure 1 As shown, the automatic cutting system has a mode switching switch 52, which is connected to the input end of the processor 5 and is used to switch between the automatic stop cutting mode and the automatic deceleration cutting mode. Specifically, when cutting non-precision-sized products, the mode switching switch 52 is switched to the automatic stop cutting mode, and the specific method in the above situation A is adopted. When cutting precision-sized products, the mode switching switch 52 is switched to the automatic deceleration cutting mode, and the specific method in the above situation B is adopted.

[0055] As a preferred design, the processor 5 also has a counting function. At this time, the automatic cutting method of the present invention also includes: in the above step S1, the preset parameters in the processor 5 also include setting the pre-cut number of branches and setting the number of branches cut to zero; in the above step S4, after the shearing mechanism 3 completes a shearing action, the processor 5 counts once, and the number of branches cut is increased by one. Specifically, it can be that after the shearing mechanism 3 performs an operation, the processor 5 receives a feedback signal to increase the number of branches cut, or it can be that the processor 5 completes a real-time length zeroing action and increases the number of branches cut; in the above step S5, when the number of branches cut counted by the processor 5 is equal to the number of branches cut, the processor 5 outputs a stop signal to the execution controller 4, and the execution controller 4 controls the conveying mechanism 2 and the shearing mechanism 3 to stop, and the entire shearing work stops. In this way, automatic cutting and automatic stopping of the shearing work are realized, and the phenomenon of overproduction will not occur, and intelligent control is realized.

[0056] The automatic shearing system and the automatic shearing method of the present invention can be applied to the cutting of various products, and in particular, can be applied to the production cutting of profiled steel. Now, the automatic shearing system in this embodiment is taken as an example to explain the production cutting of profiled steel, wherein the shearing mechanism 3 and the execution controller 4 are both located in the production unit on the profiled steel production line, the conveying mechanism 2 can be a conveyor belt on the production line, and the profiled steel can be a precisely sized profiled steel or a non-precisely sized profiled steel, and its working process is described as follows:

[0057] (1) Turn on the PLC controller and the photoelectric encoder through the start button in the start-stop switch 8, and preset the cut length and the deceleration length in the PLC controller through the touch screen; set the shearing mechanism 3 to the initial position, at which time the shearing knife 31 of the shearing mechanism 3 is in a retracted state, and the shearing trolley 32 is stationary; if the steel section is a precisely sized product, set the cut baffle 9 to the initial position at the same time, at which time the cut baffle 9 is located on the steel section conveying path, and the distance between the cut baffle 9 and the shearing knife 31 along the conveying direction is equal to the cut length; place the steel section on the conveyor belt, and align the end of the product 1 to be cut with the shearing knife 31;

[0058] (2) The PLC controller sends a start signal to the execution controller 4, and the execution controller 4 controls the conveyor belt to start conveying the steel. The steel moves forward at the first stage speed. The length measuring roller is in close contact with the steel and rotates. The length measuring roller drives the photoelectric encoder to rotate. The photoelectric encoder sends a pulse signal to the PLC controller. The PLC controller automatically calculates the real-time length of the steel according to the pulse signal, the length measuring roller diameter and the number of pulses of the photoelectric encoder that are set in advance in the PLC controller through the touch screen. Among them, the speed of the first stage can be a uniform speed or an appropriate variable speed, which is determined according to production needs, preferably a uniform speed.

[0059] (3) The PLC controller determines the relationship between the calculated real-time length and the fixed-length. When the real-time length = fixed-length – deceleration length, the PLC controller outputs a deceleration signal to the execution controller 4, and the execution controller 4 drives the conveyor belt to decelerate, and the steel section continues to move forward at the second stage speed, wherein the second stage speed is lower than the first stage speed, and the second stage speed can be a uniform speed or an appropriate variable speed, which is determined according to production requirements, preferably a uniform speed.

[0060] (4) The PLC controller continues to determine the relationship between the real-time length and the fixed-length. When the real-time length = the fixed-length, the real-time length calculated in the PLC controller is reset to zero and the calculation is restarted. At this time, depending on whether the steel is a precisely sized product, different methods are used to keep the shear mechanism 3 and the steel relatively stationary in the conveying direction. Specifically,

[0061] When the steel is a non-precisely sized product and the real-time length is equal to the fixed length, the PLC controller sends a stop signal to the execution controller 4, and the execution controller 4 controls the conveying mechanism 2 to stop conveying according to the stop signal, and the shearing mechanism 3 remains stationary in the conveying direction;

[0062] When the steel section is a product of precise size, when the real-time length = the fixed-length length, the front end of the steel section hits the fixed-length baffle 9, pushing the fixed-length baffle 9 and the shearing trolley 32 to move forward synchronously with the product 1 to be cut.

[0063] When the real-time length = the fixed length - the deceleration length, the PLC controller sends a shearing signal to the execution controller 4 at the same time. The execution controller 4 controls the shearing knife 31 to extend and cut the product 1 to be cut according to the shearing signal. From the time when the steel stops conveying or the steel hits the fixed-length baffle 9, to the time when the shearing knife 31 starts shearing, the shearing mechanism 3 needs a certain reaction time in this process, that is, the shearing knife 31 will delay shearing. After the shearing is completed, the cut product is removed from the conveyor belt in time, the shearing knife 31 is retracted, and the action feedback device transmits the feedback signal to the PLC controller. The PLC controller outputs an acceleration signal to the execution controller 4 according to the feedback signal of the shearing mechanism 3. The execution controller 4 controls the conveyor belt to accelerate according to the acceleration signal, and the steel continues to move forward at the third stage speed; after the shearing is completed, the reset mechanism drives the fixed-length baffle 9 and the shearing trolley 32 back to the initial position in time. Among them, the speed of the third stage is smaller than the speed of the second stage, and the speed of the third stage can be a uniform speed or an appropriate variable speed, which is determined according to production needs. It is preferred that the speed of the third stage is the same as the speed of the first stage.

[0064] (5) When the steel section needs to be sheared multiple times, the above processes (3) to (4) can be repeated.

[0065] From the above, it can be seen that the method of shearing steel sections using the automatic shearing system in this embodiment can be applied to both precisely sized and non-precisely sized steel sections, and can complete the linked automatic control of the transportation and shearing of the steel sections. The acceleration, deceleration, shearing, resetting and other actions in the entire shearing process can be completed automatically, effectively reducing manual operations, with high work efficiency and a high degree of intelligent control, which can effectively improve production efficiency and production quality.

[0066] In summary, the invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0067] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. An automatic cutting method, characterized in that: The automatic shearing system is used, the automatic shearing system comprising a conveying mechanism (2) for driving the product to be cut (1) to move linearly, a shearing mechanism (3) arranged beside the conveying path of the product to be cut (1), and an execution controller (4) for controlling the actions of the conveying mechanism (2) and the shearing mechanism (3), and also comprising a processor (5), a start / stop switch (8), and a length measuring sensor (6) for measuring the conveying length of the product to be cut (1), the shearing mechanism (3) having an action feedback device, the start / stop switch (8), the length measuring sensor (6), and the action feedback device are all connected to the input end of the processor (5), and the output end of the processor (5) is connected to the execution controller (4); and also comprising a fixed-length baffle installed on the conveying path of the product to be cut (1) (9), and a reset mechanism for driving the sizing baffle (9) to move, the sizing baffle (9) and the shearing mechanism (3) being fixed to each other, and the sizing baffle (9) being located in front of the shearing mechanism (3) along the conveying direction of the product to be cut (1), the sizing baffle (9) and the shearing mechanism (3) being able to move along the conveying direction of the product to be cut (1), and being able to move perpendicularly to the conveying direction of the product to be cut (1); further comprising a proximity switch (7), the proximity switch (7) being arranged in front of the shearing mechanism (3); the shearing mechanism (3) comprising a shearing knife (31), the shearing knife (31) being able to approach or move away from the conveying path of the product to be cut (1); further comprising a parameter input device (51) connected to an input end of a processor (5), the processor (5) being a PLC controller; The length measuring sensor (6) comprises a length measuring roller and a photoelectric encoder mounted on the length measuring roller and rotating synchronously with the length measuring roller, wherein the photoelectric encoder is connected to the processor (5); the automatic shearing method comprises the following steps: S1. Turning on the processor (5) and the length measuring sensor (6) through the start / stop switch (8), wherein the processor (5) is preset with a fixed length and a deceleration length; setting the shearing mechanism (3) to be located at an initial position, wherein the shearing mechanism (3) is in an initial state where no shearing action is performed; when the product (1) to be cut is a precisely fixed-length product, further setting the fixed-length baffle (9) to be located at an initial position, wherein the fixed-length baffle (9) is located on the conveying path of the product (1) to be cut, and the distance between the fixed-length baffle (9) and the shearing mechanism (3) along the conveying direction is equal to the fixed-length length; placing the product (1) to be cut on the conveying mechanism (2), and aligning the end of the product (1) to be cut with the shearing mechanism (3); S2, the processor (5) sends a start signal to the execution controller (4), the execution controller (4) controls the conveying mechanism (2) to start conveying the product to be cut (1), the product to be cut (1) moves forward at the first stage speed, the length measuring sensor (6) starts to measure the forward length of the product to be cut (1) and transmits the measurement signal to the processor (5), and the processor (5) calculates and determines the real-time forward length of the product to be cut (1) according to the measurement signal; S3, the processor (5) determines the relationship between the real-time length and the fixed-length. When the real-time length = the fixed-length length - the deceleration length, the processor (5) outputs a deceleration signal to the execution controller (4), and the execution controller (4) drives the conveying mechanism (2) to decelerate, and the product to be cut (1) continues to move forward at the second stage speed; S4, the processor (5) determines the relationship between the real-time length and the fixed-length. When the real-time length = the fixed-length length, the processor (5) resets the calculated real-time length to zero and restarts the calculation. The shearing mechanism (3) and the product to be cut (1) are relatively stationary in the conveying direction. The method of making the two relatively stationary includes the following two situations: when the product to be cut (1) is a non-precision fixed-length product, the fixed-length baffle (9) is not used at this time. When the real-time length = the fixed-length length, the processor (5) sends a stop signal to the execution controller (4). The execution controller (4) controls the conveying mechanism (2) to stop conveying according to the stop signal. The shearing mechanism (3) remains stationary in the conveying direction, ensuring that the shearing mechanism (3) and the product to be cut (1) are relatively stationary in the conveying direction. When the product to be cut (1) is a precision fixed-length product, the fixed-length baffle (9) is used at this time. When the real-time length = the fixed-length length, the front end of the product to be cut (1) hits the fixed-length baffle (9), pushing the fixed-length baffle (9) and the shearing mechanism (3) to move forward synchronously with the product to be cut (1). The processor (5) sends a shearing signal to the execution controller (4), and the execution controller (4) controls the shearing mechanism (3) to perform a shearing action and cut the product (1) to be cut according to the shearing signal; after the shearing is completed, the cut product is promptly removed from the conveying mechanism (2); after the shearing mechanism (3) completes the shearing action, the action feedback device transmits a feedback signal to the processor (5); the processor (5) sends an acceleration signal to the execution controller (4) according to the feedback signal of the shearing mechanism (3); the execution controller (4) controls the conveying mechanism (2) to accelerate according to the acceleration signal, and the product (1) to be cut continues to move forward at the third stage speed; after the shearing is completed, the conveying mechanism (2) is located at the initial position in step S1; S5. Repeat steps S3 to S4 to perform multiple shearing operations on the product to be cut (1).

2. The automatic cutting method according to claim 1, characterized in that: The processor (5) also has a counting function; The step S1 also includes: setting the number of pre-cut branches in the processor (5) and setting the number of cut branches to zero; The step S4 also includes: after the shearing mechanism (3) completes a shearing action, the processor (5) performs a counting and increases the number of cut branches by one; The step S5 also includes: when the number of cut branches counted by the processor (5) is equal to the number of pre-cut branches, the processor (5) outputs a stop signal to the execution controller (4), and the execution controller (4) controls the conveying mechanism (2) and the shearing mechanism (3) to stop moving, and the entire shearing operation stops.

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