Multi-wire cutting machine and wire arrangement deviation rectifying method and device thereof

Abstract

The invention relates to a multi-wire cutting machine and a wire arrangement deviation rectifying method and device thereof, and belongs to the field of automatic control. The flat cable deviation rectifying method is applied to the multi-wire cutting machine, and the multi-wire cutting machine comprises a flat cable take-up and pay-off mechanism. The method comprises the following steps: acquiring a first tension acquisition value of a flat cable in the multi-wire cutting machine; a first deviation between the first tension acquisition value and a reference value is obtained, and the reference value is determined according to a second tension acquisition value of forward movement of the flat cable and a third tension acquisition value of reverse movement of the flat cable; comparing the first deviation with a set deviation to obtain a comparison result; and when the comparison result meets a preset deviation correction condition, the flat cable winding and unwinding mechanism is controlled to conduct flat cable deviation correction. According to the diamond wire multi-wire cutting machine, the problem caused by the fact that inclined pulling of a flat cable in an existing diamond wire multi-wire cutting machine cannot be corrected in time can be solved, and the effect of automatic deviation correction during long-distance paying-off of the diamond wire can be achieved.

Description

Technical Field

[0001] The present application belongs to the field of automatic control, and specifically relates to a multi-wire cutting machine and a wire arrangement and correction method and device thereof. Background Art

[0002] Currently in the industry, during the pay-off process of the diamond wire multi-wire cutting machine, due to the error in the diamond wire arrangement spacing, the diamond wire between the arrangement wheel and the pay-off wheel cannot remain in a completely vertical state. After long-distance pay-off, it is easy to cause large oblique pulling. If the operator does not manually correct it in time, it is easy to cause the diamond wire to break, resulting in a large loss of production benefits. Summary of the Invention

[0003] In view of this, the purpose of the present application is to provide a multi-wire saw and its wire arrangement correction method and device, so as to improve the problem caused by the inability to correct the wire slant in the current diamond wire multi-wire saw in a timely manner.

[0004] The embodiment of the present application is implemented as follows:

[0005] In a first aspect, an embodiment of the present application provides a wire deviation correction method, which is applied to a multi-wire cutting machine, wherein the multi-wire cutting machine includes a wire retracting and releasing mechanism; the method includes: obtaining a first tension acquisition value of the wire in the multi-wire cutting machine; obtaining a first deviation between the first tension acquisition value and a reference value, wherein the reference value is determined based on a second tension acquisition value of the forward movement of the wire and a third tension acquisition value of the reverse movement of the wire; comparing the first deviation with a set deviation to obtain a comparison result; when the comparison result meets a preset correction condition, controlling the wire retracting and releasing mechanism to perform wire deviation correction.

[0006] In an embodiment of the present application, by obtaining a first deviation between a first tension acquisition value and a reference value, and comparing the first deviation with a set deviation, when the comparison result meets a preset correction condition, the wire arrangement retracting and releasing mechanism is controlled to perform wire arrangement correction, thereby achieving an effect of automatic correction when the diamond wire is paid out over a long distance, thereby improving the problem caused by the inability to correct the wire slanting in the current diamond wire multi-wire cutting machine in a timely manner; and, determining a reference value based on a second tension acquisition value of the forward movement of the wire and a third tension acquisition value of the reverse movement of the wire, thereby neutralizing the fluctuation influence of the unidirectional movement, improving the accuracy of the reference value, and further improving the correction effect, thereby reducing the problem caused by the inability to correct the wire slanting in a timely manner.

[0007] In combination with a possible implementation of the embodiment of the first aspect, when the comparison result meets the preset correction condition, the cable retracting and extending mechanism is controlled to perform cable correction, including: if the comparison result indicates that the absolute value of the first deviation is greater than the set deviation, then it is determined that the comparison result meets the preset correction condition, and the cable retracting and extending mechanism is controlled to perform cable correction.

[0008] In the embodiment of the present application, through the above method, it is possible to quickly determine whether the current cable meets the preset correction conditions, so as to perform targeted correction.

[0009] In combination with a possible implementation manner of the embodiment of the first aspect, the step of obtaining the reference value includes: determining whether the historical operating parameters of the cable arrangement in the multi-wire cutting machine meet the tension collection conditions; when the historical operating parameters meet the tension collection conditions, obtaining the second tension collection value and the third tension collection value; and obtaining the reference value based on the average value of the second tension collection value and the third tension collection value.

[0010] In an embodiment of the present application, in the process of obtaining the reference value, the historical operating parameters of the cable are first determined to meet the tension acquisition conditions (such as the multi-wire cutting machine is in a uniform motion stage) before obtaining the reference value, thereby improving the accuracy of the reference value.

[0011] In combination with a possible implementation method of the embodiment of the first aspect, whether the historical operating parameters of the cable arrangement in the multi-wire cutting machine meet the tension collection conditions is determined, including: judging whether the multi-wire cutting machine is in a uniform speed stage based on the historical operating parameters, and obtaining a judgment result; judging whether the historical operating parameters meet the tension collection conditions based on the judgment result.

[0012] In the embodiment of the present application, whether the multi-wire cutting machine is in a uniform speed stage is judged based on historical operating parameters, so as to quickly determine whether the historical operating parameters of the cable arrangement meet the tension collection conditions.

[0013] In combination with a possible implementation method of the embodiment of the first aspect, the historical operating parameters include the operating speed of the main roller in multiple adjacent cycles; based on the historical operating parameters, it is judged whether the multi-wire cutting machine is in the uniform speed stage, and the judgment result is obtained, including: obtaining a speed difference set of the operating speeds of every two adjacent cycles; judging whether all speed differences in the speed difference set are less than the preset speed difference, wherein when all speed differences in the speed difference set are less than the preset speed difference, it is determined that the multi-wire cutting machine is in the uniform speed stage.

[0014] In an embodiment of the present application, a set of speed difference values ​​of the running speeds of every two adjacent cycles can be obtained to determine whether the multi-wire cutting machine is in a uniform speed stage. If each speed difference value is less than a preset speed difference value, it indicates that the multi-wire cutting machine is in a uniform speed stage. In this way, it can be quickly and accurately determined whether the multi-wire cutting machine is in a uniform speed stage.

[0015] In combination with a possible implementation method of the embodiment of the first aspect, the historical operating parameters include the operating speed of the main roller within a specified time period; based on the historical operating parameters, it is judged whether the multi-wire cutting machine is in the uniform speed stage, and the judgment result is obtained, including: obtaining the change amplitude of the operating speed of the main roller within the specified time period; judging whether the change amplitude is less than the set amplitude, wherein, when the change amplitude is less than the set amplitude, it is determined that the multi-wire cutting machine is in the uniform speed stage.

[0016] In an embodiment of the present application, if the change amplitude of the running speed of the main roller within a specified time period is less than the set amplitude, it indicates that the multi-wire cutting machine is in a uniform speed stage. In this way, it can be quickly and accurately determined whether the multi-wire cutting machine is in a uniform speed stage.

[0017] In combination with a possible implementation manner of the embodiment of the first aspect, when the comparison result meets the preset correction condition, the cable retracting and releasing mechanism is controlled to perform cable correction, including: if the comparison result indicates that the first deviation is greater than the set deviation, the cable correction is performed using the positive correction speed; if the comparison result indicates that the first deviation is less than the negative value of the set deviation, the cable correction is performed using the reverse correction speed.

[0018] In the embodiment of the present application, the above-mentioned method facilitates targeted deviation correction, thereby enabling fast and accurate cable deviation correction.

[0019] In combination with a possible implementation manner of the embodiment of the first aspect, the forward correction speed is 270 mm / min to 340 mm / min, and / or the reverse correction speed is 270 mm / min to 340 mm / min.

[0020] In the embodiment of the present application, the above-mentioned reverse correction speed or forward correction speed is adopted to achieve faster cable correction and improve the correction effect.

[0021] In combination with a possible implementation manner of the embodiment of the first aspect, before obtaining the first tension acquisition value of the wire arrangement in the multi-wire cutting machine, the method also includes: determining whether the marked position of the wire arrangement in the multi-wire cutting machine reaches the correction area; if the marked position reaches the correction area, executing the step of "obtaining the first tension acquisition value of the wire arrangement in the multi-wire cutting machine".

[0022] In the embodiment of the present application, the first tension acquisition value of the wires in the multi-wire sawing machine is obtained only after it is determined that the marked position of the wires in the multi-wire sawing machine reaches the correction area to ensure the accuracy of the correction.

[0023] In combination with a possible implementation manner of the embodiment of the first aspect, after controlling the cable arranging and retracting mechanism to perform cable arranging correction, the method further includes: obtaining a fourth tension acquisition value of the cable arranging in the multi-wire cutting machine; obtaining a second deviation between the fourth tension acquisition value and the reference value; and stopping the cable arranging correction when the second deviation meets the condition for stopping the cable arranging correction.

[0024] In an embodiment of the present application, after the cable deviation correction is performed, the effect of the cable deviation correction is also monitored in real time. When the second deviation meets the condition for stopping the cable deviation correction, it indicates that there is no slanting in the cable at this time, and the cable deviation correction is stopped. By adding a monitoring link, the occurrence of over-correction is reduced.

[0025] In combination with a possible implementation of the embodiment of the first aspect, when the second deviation meets the condition for stopping line correction, the line correction is stopped, including: when the second deviation is 0, determining that the second deviation meets the condition for stopping line correction, and stopping the line correction.

[0026] On the second aspect, the example of the present application also provides a wire arrangement correction device, which belongs to a multi-wire cutting machine, and the multi-wire cutting machine includes a wire arrangement retracting and releasing mechanism; the wire arrangement correction device includes: an acquisition module, a comparison module and a correction module; the acquisition module is used to obtain a first tension acquisition value of the wire arrangement in the multi-wire cutting machine; and obtain a first deviation between the first tension acquisition value and a reference value, wherein the reference value is determined based on a second tension acquisition value of the forward movement of the wire arrangement and a third tension acquisition value of the reverse movement of the wire arrangement; the comparison module is used to compare the first deviation with a set deviation to obtain a comparison result; the correction module is used to control the wire arrangement retracting and releasing mechanism to perform wire arrangement correction when the comparison result meets a preset correction condition.

[0027] On the third aspect, the example of the present application also provides a multi-wire cutting machine, including: a wire arrangement retracting and releasing mechanism, a tension sensor and a controller; the wire arrangement retracting and releasing mechanism is configured to retract and release the wire and adjust the movement state of the wire; the tension sensor is configured to obtain a first tension acquisition value of the wire; a controller is connected to the tension sensor and the wire arrangement retracting and releasing mechanism, and the controller is configured to: receive the first tension acquisition value, and obtain a first deviation between the first tension acquisition value and a reference value; and compare the first deviation with the set deviation to obtain a comparison result, and when the comparison result meets the preset correction condition, control the wire arrangement retracting and releasing mechanism to perform wire correction; wherein, the reference value is determined based on the second tension acquisition value of the forward movement of the wire and the third tension acquisition value of the reverse movement of the wire.

[0028] Other features and advantages of the present application will be described in the following description. The purpose and other advantages of the present application can be realized and obtained through the structures specifically pointed out in the written description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. The above and other purposes, features and advantages of the present application will be more clearly shown through the drawings.

[0030] Figure 1 A schematic structural diagram of a multi-wire cutting machine provided in an embodiment of the present application is shown.

[0031] Figure 2 A schematic diagram showing the principle of wire deviation correction of a multi-wire cutting machine provided in an embodiment of the present application is shown.

[0032] Figure 3 A schematic diagram showing the principle of a cable deviation correction method provided in an embodiment of the present application is shown.

[0033] Figure 4 A schematic diagram showing the principle of another cable deviation correction method provided in an embodiment of the present application is shown.

[0034] Figure 5 A module schematic diagram of a cable deviation correction device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The following embodiments can be used as examples to more clearly illustrate the technical solutions of the present application, and are not intended to limit the scope of protection of the present application. It will be understood by those skilled in the art that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other.

[0036] It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in the subsequent figures. At the same time, in the description of this application, relational terms such as "first", "second", etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements that are not clearly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the sentence "comprise a..." do not exclude the presence of other identical elements in the process, method, article or equipment including the elements.

[0037] Furthermore, the term "and / or" in this application is merely a description of the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0038] In the description of the embodiments of the present application, unless otherwise clearly specified or limited, the technical term "electrical connection" may refer to a direct electrical connection or an indirect electrical connection through an intermediate medium.

[0039] The embodiments of the present application provide a multi-wire sawing machine and its wire arrangement and correction method and device to achieve the effect of automatic correction when the diamond wire is paid out over a long distance. The present application can utilize the existing structure of the multi-wire sawing machine to achieve the purpose of automatic correction without adding additional mechanical devices or other sensors. Based on the existing sensors (tension sensor, position sensor, speed sensor, etc.) in the multi-wire sawing machine, the data required for the wire arrangement and correction process of the diamond wire is collected, and the purpose of automatic correction of the wire arrangement is achieved based on this.

[0040] A multi-wire saw is a machine that cuts hard and brittle material rods into thin slices. It typically utilizes two parallel main rollers arranged horizontally, with a single diamond wire wound around them to form at least 2,000 saw wires. The hard and brittle material rod moves downward between the two main rollers. The main rollers rotate, driving the diamond wire at high speed to slice the rod into thin slices.

[0041] In one embodiment, Figure 1As shown, the multi-wire saw includes a cable retracting and unretracting mechanism, a tension sensor, and a controller. Both the cable retracting and unretracting mechanism and the tension sensor are electrically connected to the controller. It is understood that in addition to the tension sensor, the multi-wire saw is also equipped with various sensors such as position sensors, speed sensors, and angle sensors. These sensors report collected data to the controller, which then controls the cable retracting and unretracting mechanism based on the data collected by the sensors to ensure the normal operation of the multi-wire saw.

[0042] The wire-laying and retracting mechanism is configured to retract and adjust the wire's motion. It comprises a payout, a take-up, a steering mechanism, a main roller, and a diamond wire. The wire's ends are wound around the payout and take-up mechanisms, respectively. The wire passes from the payout mechanism over the main roller before being retracted into the take-up mechanism. The mechanism also allows for reverse motion, allowing the wire to pass from the take-up mechanism over the main roller before being retracted into the payout mechanism. This effectively interchanges the functions of the payout and take-up mechanisms, allowing both to employ the same structure.

[0043] After the diamond wire extends from the pay-off device, it needs to pass through the steering device to change direction, start winding on the main roller from one side of the main roller, and then wind out from the other side of the main roller. After that, it changes direction through the steering device and is wound on the take-up device. In this process, the wire is prone to slanting (either forward or reverse).

[0044] The payout device and the take-up device both include motors. Controlling the rotation (forward or reverse) of the motor in the payout device adjusts the payout speed of the payout device. Controlling the rotation of the motor in the take-up device adjusts the take-up speed of the take-up device, thereby adjusting the motion state of the wire arrangement. The motion state includes motion direction (e.g., forward motion, reverse motion) and motion speed.

[0045] The tension sensor is configured to collect tension values ​​of the cable, such as a first tension value, a second tension value, a third tension value, and a fourth tension value, and transmit the collected tension values ​​to the controller. The tension sensor includes a forward tension sensor and a reverse tension sensor.

[0046] The controller receives a first tension value (e.g., represented by Zt) collected by the tension sensor and obtains a first deviation between the first tension value and a reference value (e.g., represented by Z). The controller compares the first deviation with a set deviation to obtain a comparison result. When the comparison result satisfies a preset correction condition, the controller controls the cable retracting and unretracting mechanism to perform cable correction. If the comparison result does not satisfy the preset correction condition, the cable is not skewed and correction is not required.

[0047] It can be understood that the controller will periodically (such as 10s) obtain the first tension acquisition value collected by the tension sensor, and obtain the first deviation between the first tension acquisition value and the reference value, and compare the first deviation with the set deviation, and when the comparison result meets the preset correction condition, control the cable retraction and release mechanism to perform cable correction.

[0048] The reference value is determined based on the second tension value collected during the forward movement of the cable and the third tension value collected during the reverse movement of the cable. In one possible implementation, the reference value is the average of the second tension value collected during the forward movement of the cable (e.g., represented by Z1) and the third tension value collected during the reverse movement of the cable (e.g., represented by Z2). Expressed in a formula, the reference value Z = (Z1+Z2) / 2. By selecting the average of the second tension value collected during the forward movement of the cable and the third tension value collected during the reverse movement of the cable as the reference value, the correction effect can be improved. In some possible implementations, instead of directly using the average of the second and third tension values ​​as the reference value, the sum or difference between the average and a preset constant can be used as the reference value, or the product of the average and a weight coefficient can be used as the reference value.

[0049] In one embodiment, the controller is further configured to obtain a reference value by obtaining historical operating parameters of the wires in the multi-wire sawing machine, determining whether the historical operating parameters of the wires in the wire sawing machine meet tension collection conditions, and when the historical operating parameters meet the tension collection conditions, obtaining a second tension collection value for the forward movement of the wires and a third tension collection value for the reverse movement of the wires, and obtaining the reference value based on the average of the second and third tension collection values. In this embodiment, before obtaining the second tension collection value for the forward movement of the wires and the third tension collection value for the reverse movement of the wires, it is necessary to first determine whether the historical operating parameters of the wires meet the tension collection conditions. Only if the historical operating parameters of the wires meet the tension collection conditions are the second tension collection value for the forward movement of the wires and the third tension collection value for the reverse movement of the wires obtained, and then the reference value is obtained based on these values. This ensures a more accurate reference value.

[0050] Among them, the process of judging whether the historical operating parameters of the wiring in the multi-wire cutting machine meet the tension collection conditions can be: judging whether the multi-wire cutting machine is in a uniform speed stage based on the historical operating parameters, obtaining the judgment result, and judging whether the historical operating parameters meet the tension collection conditions based on the judgment result. If the judgment result indicates that the current multi-wire cutting machine is in a uniform speed stage, it is determined that the tension collection conditions are met.

[0051] In an optional embodiment, the historical operating parameters include the operating speeds of the main rollers of multiple adjacent cycles. Taking a cycle of 1s (second) as an example, the operating speeds of the main rollers at time nodes such as 1s (first cycle), 2s (second cycle), and 3s (third cycle) can be obtained. In this embodiment, the controller is configured to determine whether the multi-wire cutting machine is in a uniform speed stage based on the historical operating parameters. The process of obtaining the judgment result can be: obtaining a set of speed difference values ​​of the operating speeds of every two adjacent cycles, determining whether all speed differences in the speed difference set are less than a preset speed difference, and if each speed difference is less than the preset speed difference, determining that the multi-wire cutting machine is in the uniform speed stage. Taking the operating speed of the main roller in the above example as an example, obtaining the operating speed of the second cycle (2s) and the operating speed of the first cycle (1s), and obtaining the operating speed of the third cycle (3s) and the operating speed of the second cycle (2s) can obtain two speed differences. If the speed difference of the main roller in any adjacent period is less than the preset speed difference, it indicates that the current main roller is in the uniform speed stage, that is, the current multi-wire cutting machine is also in the uniform speed stage, and it is determined that the tension collection condition is met.

[0052] In one embodiment of the present specification, when the main roller is in the uniform speed stage, it indicates that the multi-wire saw is also in the uniform speed stage.

[0053] It can be understood that the above example only shows the acquisition of the running speed of the main roller for 3 consecutive cycles. If the running speed of the main roller for n (an integer greater than or equal to 2) consecutive cycles is obtained, the speed difference of the running speed of n-1 adjacent cycles can be obtained.

[0054] The above-mentioned preset speed difference can be any value from 10 to 20 mm / min. For example, it can be an end point value such as 10 mm / min, 20 mm / min, or any value between the end point values, such as 12 mm / min, 15 mm / min, etc.

[0055] In one optional embodiment, the historical operating parameters include the operating speed of the main roller within a specified time period (e.g., 10 seconds). In this embodiment, the controller is configured to determine whether the multi-wire saw is in a uniform speed stage based on the historical operating parameters. The process of obtaining the judgment result can be: obtaining the amplitude of the change in the operating speed of the main roller within the specified time period, determining whether the amplitude of the change is less than a set amplitude, and if the amplitude of the change in the operating speed of the main roller within the specified time period is less than a set amplitude (e.g., 8%), determining that the multi-wire saw is in a uniform speed stage. For example, if the amplitude of the change in the operating speed of the main roller within the specified time period is less than 8%, it indicates that the main roller is currently in a uniform speed stage, that is, the multi-wire saw is currently in a uniform speed stage, and it is determined that the tension collection condition is met.

[0056] The running speed of the above-mentioned main roller can be obtained by using a speed sensor or an angle sensor. Since the movement speed of the main roller is related to the number of revolutions of the motor shaft, the number of revolutions of the motor shaft can be collected by the angle sensor to obtain the running speed of the main roller.

[0057] In one embodiment, when the current main roller is in a uniform speed stage and the current line arrangement is a forward line arrangement, the forward tension value Z1 is collected by the forward tension sensor; when the current main roller is in a uniform speed stage and the current line arrangement is a reverse line arrangement, the reverse tension value Z2 is collected by the reverse tension sensor, thereby obtaining a reference value Z = (Z1+Z2) / 2.

[0058] In some embodiments, after obtaining a baseline value, it can be used repeatedly until a condition indicating that the current baseline value is inaccurate occurs, at which point the baseline value is re-obtained. For example, if two consecutive layers of wire (one layer in the forward direction of the wire arrangement, followed by one layer in the reverse direction after reversing) undergo a correction during the payout process, and the output correction speeds are equal in magnitude and direction, this indicates that the baseline value is inaccurate, resulting in over-correction (overcorrection), and the baseline value needs to be re-obtained.

[0059] In some implementations, the reference value may be obtained each time the multi-wire saw is powered on, and the reference value may be obtained again the next time the multi-wire saw is powered on. This ensures that the obtained reference values ​​are the most accurate.

[0060] In which, the above-mentioned historical operating parameters may also include the marked position of the cable (such as the position of the cable head). Before obtaining the first tension acquisition value of the cable in the multi-wire cutting machine, the controller is also configured to determine whether the marked position of the cable in the multi-wire cutting machine has reached the correction area. Only after determining that the marked position of the cable in the multi-wire cutting machine has reached the correction area, the first tension acquisition value of the cable in the multi-wire cutting machine is obtained. In this embodiment, before obtaining the first tension acquisition value of the cable in the multi-wire cutting machine, it is necessary to determine whether the marked position of the cable has reached the correction area. If the marked position of the cable has reached the correction area, the correction function is turned on. In which, the marked position of the cable can be acquired by a position sensor. If the marked position of the current cable is within the cable range and the cables on both sides are not adjusted outside the distance, it means that the cable has reached the correction area. Otherwise, it is determined that it is not in the correction area.

[0061] In addition, the historical operating parameters may also include the running direction of the line (such as forward or reverse), so that when the current main roller is in the uniform speed stage and the current line is in the forward direction, the forward tension value Z1 is collected through the forward tension sensor; when the current main roller is in the uniform speed stage and the current line is in the reverse direction, the reverse tension value Z2 is collected through the reverse tension sensor.

[0062] In one embodiment, the controller is configured to control the cable retracting and extending mechanism to perform cable correction when the comparison result satisfies a preset correction condition. The process may be as follows: if the absolute value of the first deviation represented by the comparison result is greater than the set deviation, the comparison result is determined to satisfy the preset correction condition, and the cable retracting and extending mechanism is controlled to perform cable correction. If Et represents the first deviation and e represents the set deviation, then if Et is greater than e or Et is less than -e, the comparison result is determined to satisfy the preset correction condition.

[0063] In one embodiment, the controller is configured to control the cable retracting and unwinding mechanism to perform cable correction when the comparison result satisfies a preset correction condition. The process may be as follows: if the comparison result indicates that the first deviation is greater than a set deviation, indicating that the cable is currently in a forward slanting state, the cable correction is performed using a forward correction speed; if the comparison result indicates that the first deviation is less than the negative value of the set deviation, indicating that the cable is currently in a reverse slanting state, the cable correction is performed using a reverse correction speed. That is, if the cable is currently in a forward slanting state, the cable retracting and unwinding mechanism is additionally assigned a forward correction speed to correct the forward slanting; if the cable is currently in a reverse slanting state, the cable retracting and unwinding mechanism is additionally assigned a reverse correction speed to correct the reverse slanting.

[0064] In an optional embodiment, the forward correction speed is 270mm / min to 340mm / min, and / or the reverse correction speed is 270mm / min to 340mm / min; for example, assuming that the current cable speed is 2400mm / min and the current cable is in a forward oblique pulling state, an additional forward correction speed is given to the cable retracting mechanism. At this time, the cable speed becomes 2400mm / min+270mm / min to 340mm / min; if the current cable is in a reverse oblique pulling state, an additional reverse correction speed is given to the cable retracting mechanism to correct the reverse oblique pulling. At this time, the cable speed becomes 2400mm / min-270mm / min to 340mm / min.

[0065] In some preferred embodiments, the forward correction speed and / or the reverse correction speed is 285 mm / min. It should be noted that this preferred correction speed is obtained after verification by the applicant and has a better correction effect than other correction speeds.

[0066] If the first deviation is greater than the set deviation, the current cable is in a forward slanting state; if the first deviation is less than the negative value of the set deviation, the current cable is in a reverse slanting state. The first deviation can be represented by Et, where Et = Zt - Z, and the set deviation can be represented by e. If the first deviation is in the range [-e, e], no correction is required. If Et is greater than e, the current cable is in a forward slanting state; if Et is less than -e, the current cable is in a reverse slanting state.

[0067] The range of the set deviation e is generally: 0.05-0.27, and the preferred range of e is 0.16-0.19. It should be noted that the preferred value of e was obtained after verification by the applicant and has a better correction effect than other deviation thresholds e. Among them, e has a range of values ​​because different multi-wire saws correspond to different e. Each multi-wire saw corresponds to a fixed value of e, for example, 0.19.

[0068] In an alternative embodiment, a controller can transmit the reverse or forward correction speed to the motor in the cable traversing mechanism within the cable retracting and unwinding mechanism. After receiving the correction speed, the motor adjusts its speed based on the speed, controlling the cable traversing shaft to correct the skew. During the traversing process, the absolute value of Et gradually decreases. When Et falls within the set deviation threshold range [-e, e], the skew is eliminated and correction stops.

[0069] In one optional embodiment, after controlling the cable retracting and unretracting mechanism to perform cable deflection correction, the controller is further configured to: obtain a fourth tension value of the cable in the multi-wire sawing machine; obtain a second deviation between the fourth tension value and a reference value; and stop performing cable deflection correction when the second deviation satisfies a condition for stopping cable deflection correction. After controlling the cable retracting and unretracting mechanism to perform cable deflection correction, after a preset time period has elapsed, the cable tension value of the cable in the multi-wire sawing machine (this time the fourth tension value) is again obtained, and a second deviation between the fourth tension value and the reference value is obtained. If the second deviation satisfies the condition for stopping cable deflection correction, indicating no skewing, deflection correction can be stopped. If the second deviation still exceeds the set deviation threshold range, the cable retracting and unretracting mechanism continues to perform cable deflection correction.

[0070] In one possible implementation, when the second deviation satisfies the condition for stopping wire alignment correction, the process of stopping wire alignment correction may be: when the second deviation is less than the set deviation, stopping wire alignment correction; for example, when the second deviation is 0, determining that the second deviation satisfies the condition for stopping wire alignment correction, and stopping wire alignment correction.

[0071] The above-mentioned controller can be a programmable logic device, for example, a programmable logic controller (PLC), a field programmable gate array (FPGA) or other programmable logic devices. Of course, the controller can also be a processor, for example, a general-purpose processor, including a central processing unit (CPU), a network processor (NP), a microprocessor, etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a discrete gate or transistor logic device, a discrete hardware component. The various methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. Or the controller can also be any conventional processor, etc.

[0072] In a possible implementation, the principle of the wire deviation correction of the multi-wire cutting machine can be as follows: Figure 2 As shown. After the correction function is turned on, the historical operating parameters of the current cable arrangement are obtained (which may include the operating speed of the main roller, the mark position, the cable arrangement direction, etc.), and it is determined whether the historical operating parameters meet the tension collection conditions. If the tension collection conditions are met, the second tension collection value of the cable arrangement in the forward direction and the third tension collection value of the cable arrangement in the reverse direction are obtained, and the reference value is obtained to determine whether the mark position of the cable arrangement reaches the correction area. If it reaches the correction area, the first tension collection value of the cable arrangement in the multi-wire cutting machine is obtained, and the first deviation between the first tension collection value and the reference value is calculated. It is determined whether the first deviation exceeds the set deviation threshold range [-e, e]. If the first deviation exceeds the set deviation threshold range, the cable arrangement retraction and extension mechanism is controlled to perform cable correction.

[0073] The embodiment of the present application also provides a wire alignment correction method for a multi-wire cutting machine, wherein the multi-wire cutting machine includes a wire arrangement and retracting mechanism and various sensors. The wire alignment correction method can be specifically applied to a controller in the multi-wire cutting machine, such as Figure 3 As shown below, we will combine Figure 3 The cable deviation correction method is described.

[0074] S1: Acquire the first tension value of the wire arrangement in the multi-wire cutting machine.

[0075] The controller may obtain a first tension acquisition value of the wire arrangement in the multi-wire cutting machine from a tension sensor.

[0076] In one optional embodiment, prior to step S1, the cable deflection correction method further includes determining whether the marked position of the cable in the multi-wire sawing machine has reached the deflection correction area. If the marked position has reached the deflection correction area, step S1 is executed. In this embodiment, the first tension value of the cable in the multi-wire sawing machine is acquired only after the marked position of the cable has reached the deflection correction area. The marked position of the cable can be acquired by a position sensor.

[0077] S2: Obtain a first deviation between the first tension acquisition value and a reference value.

[0078] After obtaining the first tension value, a first deviation between the first tension value and a reference value can be obtained, wherein the reference value is determined based on the second tension value of the cable in the forward direction and the third tension value of the cable in the reverse direction.

[0079] In an optional implementation, before S2, the wire arrangement correction method also includes: obtaining historical operating parameters of the wire arrangement in the multi-wire cutting machine; judging whether the historical operating parameters of the wire arrangement in the multi-wire cutting machine meet the tension acquisition conditions; when the historical operating parameters meet the tension acquisition conditions, obtaining a second tension acquisition value of the forward movement of the wire arrangement and a third tension acquisition value of the reverse movement of the wire arrangement; obtaining the reference value based on the average value of the second tension acquisition value and the third tension acquisition value.

[0080] Optionally, the process of determining whether the historical operating parameters of the wiring in the multi-wire cutting machine meet the tension collection conditions may be: determining whether the multi-wire cutting machine is in a uniform speed stage based on the historical operating parameters, and obtaining a determination result; and determining whether the historical operating parameters meet the tension collection conditions based on the determination result.

[0081] Optionally, the historical operating parameters include the operating speed of the main roller in multiple adjacent cycles. Based on the historical operating parameters, it is judged whether the multi-wire cutting machine is in the uniform speed stage. The process of obtaining the judgment result can be: obtaining a speed difference set of the operating speeds of every two adjacent cycles; judging whether all speed differences in the speed difference set are less than a preset speed difference, wherein when all speed differences in the speed difference set are less than the preset speed difference, it is determined that the multi-wire cutting machine is in the uniform speed stage.

[0082] Optionally, the historical operating parameters include the operating speed of the main roller within a specified time period. Based on the historical operating parameters, it is determined whether the multi-wire cutting machine is in a uniform speed stage, and the judgment result is obtained, including: obtaining the change amplitude of the operating speed of the main roller within the specified time period; judging whether the change amplitude is less than the set amplitude, wherein when the change amplitude is less than the set amplitude, it is determined that the multi-wire cutting machine is in the uniform speed stage.

[0083] S3: Compare the first deviation with the set deviation to obtain a comparison result.

[0084] After obtaining the first deviation, the first deviation is compared with the set deviation to obtain a comparison result.

[0085] S4: When the comparison result meets the preset correction condition, the cable retracting and extending mechanism is controlled to perform cable correction.

[0086] If the comparison result does not meet the preset correction condition, the above steps S1, S2, and S3 are repeated; if the comparison result meets the preset correction condition, the cable retracting and releasing mechanism is controlled to perform cable correction.

[0087] In one embodiment, the process of S4 may be: if the comparison result indicates that the absolute value of the first deviation is greater than the set deviation, it is determined that the comparison result meets the preset correction condition, and the cable retracting and releasing mechanism is controlled to perform cable correction.

[0088] Optionally, the implementation process of S4 may be: if the comparison result indicates that the first deviation is greater than the set deviation, the line correction is performed using the positive correction speed; if the comparison result indicates that the first deviation is less than the negative value of the set deviation, the line correction is performed using the reverse correction speed.

[0089] In an optional embodiment, after S4, the cable deviation correction method further includes: S5, S6, S7, and its principle diagram is as follows: Figure 4 shown.

[0090] S5: Acquire a fourth tension value of the wire arrangement in the multi-wire cutting machine.

[0091] S6: Obtain a second deviation between the fourth tension acquisition value and the reference value.

[0092] S7: When the second deviation satisfies a condition for stopping the wire arrangement and correction, the wire arrangement and correction is stopped.

[0093] In one implementation, the implementation process of S7 may be to determine that the second deviation satisfies the condition for stopping the wire arrangement and correction when the second deviation is 0, and stop the wire arrangement and correction.

[0094] The wire deviation correction method provided in the embodiment of the present application has the same implementation principle and technical effects as those of the aforementioned multi-wire cutting machine embodiment. For the sake of brief description, for matters not mentioned in the method embodiment, reference can be made to the corresponding content in the aforementioned multi-wire cutting machine embodiment.

[0095] The embodiment of the present application also provides a wire deviation correction device 100 in the above-mentioned multi-wire cutting machine, such as Figure 5 As shown, the cable deviation correction device 100 includes an acquisition module 110 , a comparison module 120 , and a deviation correction module 130 .

[0096] Among them, the acquisition module 110 is used to obtain the first tension acquisition value of the cable in the multi-wire cutting machine; and obtain the first deviation between the first tension acquisition value and the reference value, wherein the reference value is determined based on the second tension acquisition value of the forward movement of the cable and the third tension acquisition value of the reverse movement of the cable.

[0097] The comparison module 120 is configured to compare the first deviation with a set deviation to obtain a comparison result.

[0098] The correction module 130 is used to control the cable retracting and extending mechanism to perform cable correction when the comparison result meets a preset correction condition.

[0099] In an optional embodiment, the correction module 130 is used to determine that the comparison result meets the preset correction condition if the absolute value of the first deviation represented by the comparison result is greater than the set deviation, and control the cable retracting and releasing mechanism to perform cable correction.

[0100] In an optional embodiment, the correction module 130 is used to perform line correction using a forward correction speed if the comparison result indicates that the first deviation is greater than the set deviation; and to perform line correction using a reverse correction speed if the comparison result indicates that the first deviation is less than the negative value of the set deviation.

[0101] In an optional embodiment, the acquisition module 110 is also used to determine whether the historical operating parameters of the cable arrangement in the multi-wire cutting machine meet the tension acquisition conditions; when the historical operating parameters meet the tension acquisition conditions, the second tension acquisition value and the third tension acquisition value are acquired; and the reference value is acquired based on the average value of the second tension acquisition value and the third tension acquisition value.

[0102] In an optional embodiment, the acquisition module 110 is used to determine whether the multi-wire cutting machine is in a uniform speed stage based on the historical operating parameters and obtain a judgment result; based on the judgment result, determine whether the historical operating parameters meet the tension acquisition conditions.

[0103] In an optional embodiment, the acquisition module 110 is used to obtain a speed difference set of the operating speeds of each two adjacent cycles if the historical operating parameters include the operating speeds of the main roller in multiple adjacent cycles; and to determine whether all speed differences in the speed difference set are less than a preset speed difference, wherein when all speed differences in the speed difference set are less than the preset speed difference, it is determined that the multi-wire cutting machine is in the uniform speed stage.

[0104] In an optional embodiment, the acquisition module 110 is used to obtain the change amplitude of the operating speed of the main roller within the specified time period if the historical operating parameters include the operating speed of the main roller within the specified time period; and determine whether the change amplitude is less than the set amplitude, wherein when the change amplitude is less than the set amplitude, it is determined that the multi-wire cutting machine is in the uniform speed stage.

[0105] In an optional embodiment, the acquisition module 110 is also used to determine whether the marked position of the wiring in the multi-wire cutting machine reaches the correction area before obtaining the first tension acquisition value of the wiring in the multi-wire cutting machine; if the marked position reaches the correction area, the step of "obtaining the first tension acquisition value of the wiring in the multi-wire cutting machine" is executed.

[0106] In an optional embodiment, the acquisition module 110 is used to obtain a fourth tension acquisition value of the cable in the multi-wire cutting machine after controlling the cable retracting and releasing mechanism to perform cable correction; obtain a second deviation between the fourth tension acquisition value and the reference value; the correction module 130 is also used to stop cable correction when the second deviation meets the condition for stopping cable correction.

[0107] In an optional embodiment, the correction module 130 is configured to, when the second deviation is 0, determine that the second deviation satisfies the condition for stopping the wire arrangement correction, and stop performing the wire arrangement correction.

[0108] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0109] In addition, the functional modules in each embodiment of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0110] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A wire arrangement and correction method, applied to a multi-wire cutting machine, characterized in that: The multi-wire cutting machine includes a wire arrangement and retracting mechanism; the method includes: Obtain the first tension value of the wire arrangement in the multi-wire cutting machine; Obtaining a first deviation between the first tension acquisition value and a reference value, wherein the reference value is determined according to a second tension acquisition value of the cable in the forward direction and a third tension acquisition value of the cable in the reverse direction; Comparing the first deviation with the set deviation to obtain a comparison result; When the comparison result meets the preset correction condition, the cable arrangement retracting and releasing mechanism is controlled to perform cable arrangement correction.

2. The cable deviation correction method according to claim 1, characterized in that When the comparison result meets the preset correction condition, the cable arrangement retracting and releasing mechanism is controlled to perform cable arrangement correction, including: If the comparison result indicates that the absolute value of the first deviation is greater than the set deviation, it is determined that the comparison result meets the preset deviation correction condition, and the cable retracting and releasing mechanism is controlled to perform cable deviation correction.

3. The cable deviation correction method according to claim 1, characterized in that: The step of obtaining the reference value comprises: Determine whether the historical operation parameters of the cable arrangement in the multi-wire cutting machine meet the tension collection conditions; When the historical operating parameters meet the tension acquisition condition, acquiring the second tension acquisition value and the third tension acquisition value; The reference value is obtained according to an average value of the second tension collection value and the third tension collection value.

4. The cable deviation correction method according to claim 3, characterized in that: Determining whether the historical operating parameters of the cable arrangement in the multi-wire cutting machine meet the tension collection conditions includes: According to the historical operating parameters, determining whether the multi-wire cutting machine is in a uniform speed stage, and obtaining a determination result; According to the judgment result, it is judged whether the historical operating parameters meet the tension collection conditions.

5. The cable deviation correction method according to claim 4, characterized in that: The historical operating parameters include the operating speeds of the main rollers in a plurality of adjacent cycles; judging whether the multi-wire cutting machine is in a uniform speed stage according to the historical operating parameters, and obtaining the judgment result, including: Obtain a speed difference value set of the running speeds of every two adjacent cycles; It is determined whether all the speed differences in the speed difference set are smaller than a preset speed difference, wherein when all the speed differences in the speed difference set are smaller than the preset speed difference, it is determined that the multi-wire cutting machine is in the uniform speed stage.

6. The cable deviation correction method according to claim 4, characterized in that: The historical operating parameters include the operating speed of the main roller within a specified time period; According to the historical operating parameters, judging whether the multi-wire cutting machine is in a uniform speed stage, and obtaining a judgment result, including: Obtaining a change in the running speed of the main roller within the specified time period; It is determined whether the change amplitude is smaller than a set amplitude, wherein when the change amplitude is smaller than the set amplitude, it is determined that the multi-wire cutting machine is in the uniform speed stage.

7. The cable deviation correction method according to claim 1, characterized in that: When the comparison result meets the preset correction condition, the cable arrangement retracting and releasing mechanism is controlled to perform cable arrangement correction, including: If the comparison result indicates that the first deviation is greater than the set deviation, the line is corrected using a positive correction speed; If the comparison result indicates that the first deviation is smaller than the negative value of the set deviation, the reverse deviation correction speed is used to perform wire alignment correction.

8. The cable deviation correction method according to claim 1, characterized in that: Before acquiring the first tension acquisition value of the wire arrangement in the multi-wire cutting machine, the method further includes: Determine whether the marked position of the cable arrangement in the multi-wire cutting machine reaches the deviation correction area; If the marked position reaches the deviation correction area, the step of "obtaining a first tension acquisition value of the cable arrangement in the multi-wire cutting machine" is performed.

9. The cable deviation correction method according to any one of claims 1 to 8, characterized in that: After controlling the cable arrangement retracting and releasing mechanism to perform cable arrangement deviation correction, the method further includes: Get the fourth tension value of the wire arrangement in the multi-wire cutting machine; Obtaining a second deviation between the fourth tension acquisition value and the reference value; When the second deviation satisfies the condition for stopping the wire arrangement and correction, the wire arrangement and correction is stopped.

10. The cable deviation correction method according to claim 9, characterized in that: When the second deviation satisfies a condition for stopping the wire arrangement and correction, stopping the wire arrangement and correction includes: When the second deviation is 0, it is determined that the second deviation satisfies the condition for stopping the wire arrangement and correction, and the wire arrangement and correction are stopped.

11. A wire deviation correction device, belonging to a multi-wire cutting machine, characterized in that: The multi-wire cutting machine includes a wire arrangement and retracting mechanism; the wire arrangement and deviation correction device includes: An acquisition module is used to acquire a first tension acquisition value of a cable in a multi-wire cutting machine; and acquire a first deviation between the first tension acquisition value and a reference value, wherein the reference value is determined according to a second tension acquisition value of the cable moving forward and a third tension acquisition value of the cable moving backward; A comparison module, used for comparing the first deviation with a set deviation to obtain a comparison result; The correction module is used to control the cable arrangement retracting and releasing mechanism to perform cable arrangement correction when the comparison result meets the preset correction condition.

12. A multi-wire cutting machine, characterized in that: include: A cable retracting and releasing mechanism, configured to retract and release the cable and adjust the motion state of the cable; A tension sensor is configured to obtain a first tension value of the cable; A controller is connected to the tension sensor and the cable retracting and releasing mechanism, and the controller is configured to: receive the first tension acquisition value, and obtain a first deviation between the first tension acquisition value and a reference value; and compare the first deviation with a set deviation to obtain a comparison result, and when the comparison result meets a preset correction condition, control the cable retracting and releasing mechanism to perform cable correction; wherein the reference value is determined based on a second tension acquisition value of the forward movement of the cable and a third tension acquisition value of the reverse movement of the cable.

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