Control method and control device for cutting wires of multi-wire cutting machine

Abstract

The invention discloses a control method and device for cutting wires of a multi-wire cutting machine, and belongs to the technical field of stone cutting equipment.The control device comprises a rack, a take-up and pay-off assembly, four positioning rollers and an adjusting structure, and the adjusting structure comprises a plurality of adjusting rollers divided into a plurality of groups and a swing assembly arranged on the rack; a plurality of wire abutting blocks which are distributed on the different sets of adjusting rollers in a staggered mode at equal intervals are fixedly arranged on the surfaces of the adjusting rollers, and the swing assembly can guide the multiple sets of adjusting rollers to conduct synchronous reciprocating swing in a grouped mode. According to the control method and device for the cutting line of the multi-wire cutting machine, dynamic contact between the cutting line and the rough stone block is achieved by alternately abutting against the cutting sections, and the cutting load of the cutting line is effectively reduced while the high cutting efficiency of the multi-wire cutting machine is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stone cutting equipment, in particular to a control method and control device for cutting lines of a multi-wire cutting machine. BACKGROUND

[0002] A multi-wire cutting machine is a relatively advanced device for dividing natural stone rough materials into stone slabs. Compared with a stone pull saw machine, a multi-wire cutting machine using diamond sand wire can effectively reduce the width of each cutting seam on the stone, and the stone cutting efficiency is relatively improved by 2 to 3 times, the stone yield is increased by 15% to 20%, and the amount of stone powder is reduced by 80%, thereby realizing cost reduction and efficiency increase in the stone industry.

[0003] The existing patent CN116690817A discloses a line arranging and automatic deviation correcting device and method for a multi-wire cutting machine. The main structure includes a line winding and unwinding roller mechanism, a line arranging and deviation correcting mechanism, a tension adjusting mechanism, and a tension detecting mechanism. The line winding and unwinding roller mechanism moves the diamond sand wire at a high speed to effectively cut the stone surface contacted by the diamond sand wire. According to the tension change of the diamond sand wire after contacting the stone, the tension adjusting mechanism and the tension detecting mechanism can adjust the tension of the diamond sand wire to a preset tension.

[0004] The above-mentioned main structures in the patent ensure that the diamond sand wire can gradually and smoothly cut when facing complex stone surfaces. The diamond sand wire gradually moves to the same horizontal plane from different positions contacting complex stone surfaces. However, the load of the diamond sand wire with the same number of lines will significantly increase due to the increase in stone hardness. Small tension adjustment is still prone to diamond sand wire breakage. Therefore, when cutting high-hardness stone rough materials, the number of lines of diamond sand wire must be reduced or even halved before processing, i.e., artificial rethreading is required, which affects the processing efficiency.

[0005] The existing technology usually uses a stone pull saw machine to process high-hardness stone rough materials, which has high processing loss. The present application proposes a control method and control device for cutting lines of a multi-wire cutting machine to solve the above-mentioned problems. SUMMARY

[0006] The present application aims to solve the problems in the prior art and proposes a control method and control device for cutting lines of a multi-wire cutting machine.

[0007] In order to achieve the above object, the present application adopts the following technical scheme: A control device for cutting wire of a multi-wire cutting machine, comprising a rack, a take-up and pay-off assembly, four positioning rollers and an adjusting structure, the positioning rollers are driven by a wire arranging motor fixedly arranged on the rack to rotate on the rack, the take-up and pay-off assembly is arranged at both ends of the rack and guides an entire cutting wire to be wound on the surfaces of the four positioning rollers at equal distances and then transported from one end of the rack to the other end of the rack, the cutting wire has a plurality of cutting sections arranged in parallel on the same plane, and the plurality of cutting sections form a processing surface, the adjusting structure comprises: adjusting rollers arranged on one side of the processing surface, a plurality of the adjusting rollers are divided into a plurality of groups, the adjusting rollers in each group are distributed at both ends of the rack, and the adjusting rollers are fixedly provided with a plurality of wire abutting blocks at equal distances on the circumferential sides and staggered on the adjusting rollers in different groups; a swinging assembly arranged on the rack, the swinging assembly can guide the adjusting rollers in a plurality of groups to swing reciprocally in groups synchronously, the wire abutting blocks on the adjusting rollers abut the cutting sections one by one through swinging, and the swinging assembly comprises extension bars, sliding blocks, first positioning rods, second positioning rods, driving members and a base, the base is fixedly arranged on the rack, one end of each of the extension bars is rotationally connected with the first positioning rod of the base, the sliding block is slidingly arranged on the extension bar, the sliding block is rotationally connected with the output end of the driving member through the second positioning rod, and one end of the extension bar away from the first positioning rod and the sliding block is fixedly connected with the adjusting roller; wherein the transmission speed of the take-up and pay-off assembly at the positions where the cutting wire enters and leaves the processing surface can be independently adjusted, and the swinging range of the adjusting roller can make the axis thereof reach a position parallel to the processing surface.

[0008] The present application is further provided that the projection positions of the cutting sections abutted by the wire abutting blocks on the adjusting rollers of the previous group and the cutting sections abutted by the wire abutting blocks on the adjusting rollers of the next group are adjacent in the processing surface.

[0009] The present application is further provided that the adjusting rollers of each group are symmetrically distributed on both sides of the processing surface, and the included angle between the axis of the adjusting roller abutting the cutting section of the first group and the processing surface is on the same side of the position where the cutting wire enters the processing surface.

[0010] The present application is further provided that the vertical section of the wire abutting block is a circular ring coaxially arranged with the adjusting roller.

[0011] The present application is further provided that the take-up and pay-off assembly comprises two take-up and pay-off rollers winding the cutting wire and a take-up and pay-off motor fixedly arranged on the rack for driving the take-up and pay-off rollers.

[0012] A kind of control method of cutting line of multi-wire saw, for controlling the control device of a kind of multi-wire saw cutting line as described above, according to the number F of the cutting section of the processing surface and the group number G of positioning roller, the number F / G of the line block is equidistantly installed on the adjusting roller, the distance of adjacent line block abutting cutting section position is G times of the distance D between adjacent cutting section in processing surface, then according to the swing sequence preset by swing assembly, several adjusting rollers are sequentially connected with swing assembly, and the control method comprises the following steps: Step one: start the wire arranging motor, and at the same time, make the take-up and pay-off assembly start to transmit cutting line into and out of the processing surface at the same speed; Step two: make the transmission speed V1 of the take-up and pay-off assembly transmitting cutting line into the processing surface greater than the transmission speed V2 of the take-up and pay-off assembly transmitting cutting line out of the processing surface, and at the same time, make the swing assembly drive the adjusting roller to swing, when the several line blocks on the first group of adjusting rollers all reach the limit swing position in the state of abutting cutting section, make V1 equal to V2; The several groups of adjusting rollers are driven by the swing assembly to perform several rounds of preset sequence reciprocating swing, and at the same time, start to let the material approach and be cut through the cutting section; Step three: when the cutting section cuts to the predetermined position of the material, keep the relative position of the material and the processing surface at this time, and after the several groups of adjusting rollers all let the line block lose abutment with the cutting section at least once, make V1 less than V2; After the several adjusting rollers return to the state of not abutting the cutting section, make V1 equal to V2; Step four: stop the wire arranging motor, and at the same time, make the take-up and pay-off assembly stop transmitting cutting line, and then the material can be separated from the processing surface; Wherein, the absolute value V3 of the difference between V1 and V2 in step two and step three is equal, measure and determine the maximum change constant A of the total length of the cutting section between the two positioning rollers caused by the abutment of the line block on each group of adjusting rollers with the same cutting section, combine V3 and the number F / G of the line block, and calculate the time T1 of V3 in step two and step three through the formula T1=F / G×A / V3, the time T2 of the several line blocks on the first group of adjusting rollers from the state of not abutting the cutting section to the limit swing position in the state of abutting the cutting section, starts at the same time as T1, and the length of the adjusting roller swing period T2 is not less than the speed difference duration T1.

[0013] In summary, the present application has the following beneficial effects: by alternating abutment with the cutting section, dynamic contact between the cutting line and the stone rough material is realized, while ensuring high cutting efficiency of the multi-wire saw, the cutting load of the cutting line is effectively reduced, by increasing or reducing the total length of the cutting line participating in winding the four positioning rollers within a specified time, the multi-wire saw can meet the quick switching of the operating state of cutting out stone plates of the same thickness but different hardness. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 Structure diagram of embodiment one Figure 1 ; Figure 2 Structure diagram of cutting line, positioning roller and swing assembly of embodiment one Figure 3 Structure diagram of embodiment one Figure 2 ; Figure 4 Structure diagram of Figure 3 enlarged view of A in FIG. 1; Figure 5 Structure diagram of adjusting roller and swing assembly of embodiment one Figure 6 Sectional view of rack of embodiment one Figure 7 Structure diagram of Figure 6 enlarged view of B in FIG. 1.

[0015] In the figure: 1, rack; 11, processing surface; 2, cutting line; 3, positioning roller; 31, wire arranging motor; 4, adjusting roller; 41, wire abutting block; 5, swing assembly; 51, extension strip; 52, sliding block; 53, first positioning rod; 54, second positioning rod; 55, driving member; 56, base; 6, take-up and pay-off roller; 61, take-up and pay-off motor. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely used to facilitate the description of the present application and simplify the description, and therefore should not be construed as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as a limitation on the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all embodiments.

[0017] A control device for the cutting line of a multi-wire cutting machine, embodiment one: As Figures 1 to 7As shown, including rack 1, pay-off and take-up assembly, four positioning rollers 3, vertically liftable worktable, tension control mechanism and adjustment structure, positioning rollers 3 are driven by fixedly arranged wire arranging motor 31 on rack 1 to rotate on rack 1, pay-off and take-up assembly is arranged at both ends of rack 1 and guides a whole cutting wire 2 to be wound on the surfaces of four positioning rollers 3 at equal intervals and then conveyed from one end of rack 1 to the other end of rack 1, wherein the pay-off and take-up assembly comprises two pay-off and take-up rollers 6 winding the cutting wire 2 and pay-off and take-up motor 61 fixedly arranged on rack 1 for driving the pay-off and take-up rollers 6, the cutting wire 2 has a plurality of parallel cutting sections on the same plane, and the plurality of cutting sections form a processing surface 11, the tension control mechanism is arranged between the pay-off and take-up rollers 6 and the processing surface 11, and the pay-off and take-up assembly and the tension control mechanism adopt a closed-loop feedback control mode, so as to ensure the constant tension of the cutting wire 2 during the cutting process of the processing surface 11, the tension control mechanism is a conventional technology of similar multi-wire cutting machines, and will not be described here too much, the rack 1 of the similar multi-wire cutting machine is fixed on the ground, the processing surface 11 is located at the position parallel to the surface of the worktable bearing the stone rough material, after the natural stone rough material is placed on the worktable, the worktable is lifted by hydraulic pressure to gradually approach the processing surface 11, and then the stone rough material is cut by the cutting sections from top to bottom to a preset depth, and usually in production, the depth of the stone rough material cut is not enough to cut it completely; The adjustment structure comprises four adjustment rollers 4 arranged between the processing surface 11 and the worktable and a swing assembly 5 arranged on the rack 1, the four adjustment rollers 4 are divided into two groups, two adjustment rollers 4 in each group are distributed at both ends of the rack 1, and a plurality of line abutting blocks 41 are fixedly arranged on the circumferential side of the adjustment roller 4 at equal intervals and staggered on the adjustment rollers 4 in different groups, taking 96 turns of the cutting wire 2 wound on the four positioning rollers 3 as an example, the number of cutting sections is 96, and each adjustment roller 4 has 48 line abutting blocks 41, the swing assembly 5 can guide the two groups of adjustment rollers 4 to synchronously reciprocate in groups, and each reciprocation is performed for several rounds, and the plurality of line abutting blocks 41 on the adjustment roller 4 abut the cutting sections one by one through swinging, so that part of the cutting wire 2 forming the processing surface 11 is away from the processing surface 11 at the same time, half of the cutting sections in the embodiment are away from the processing surface 11 due to being lifted, and the half of the cutting sections participating in the lifting are alternated with the other half of the cutting wire 2 cutting the stone rough material at the same time due to the alternate abutting of the two groups of adjustment rollers 4, the cutting sections alternately abut the stone rough material, so as to effectively reduce the cutting load borne by the cutting wire 2; In order to adapt to the tension change of the cutting segment between the two positioning rollers 3 caused by the lifting of the line-pressing blocks 41, the transmission speed of the cutting line 2 into and out of the processing surface 11 of the take-up and pay-off assembly can be independently adjusted, that is, the transmission speed of the cutting line 2 into the processing surface 11 of the take-up and pay-off assembly is increased alone, or the transmission speed of the cutting line 2 out of the processing surface 11 of the take-up and pay-off assembly is decreased alone, or both changes are made, which can change the total length of the cutting line 2 involved in winding the four positioning rollers 3; In order to make the cutting segment have a uniform height lifted by the line-pressing blocks 41, the swing range of the adjusting roller 4 can make its axis reach a position parallel to the processing surface 11 when the line-pressing blocks 41 on the adjusting roller 4 abut against the cutting segment, so that the maximum change amount of the total length of the cutting segment between the two positioning rollers 3 caused by the abutment of the line-pressing blocks 41 on each group of adjusting rollers 4 can be fixed by the reciprocating swing of the swing assembly 5 within a constant swing range. Since the original length of the cutting segment is relatively long, the change amount can be approximately the height of the cutting segment lifted by the line-pressing blocks 41 of the corresponding size specification. For example, in the embodiment, the length of the cutting segment is two meters, and the maximum lifting height of the line-pressing blocks 41 is three centimeters, so the constant is fixed at six centimeters. The constant is positively correlated with the speed of the stone rough material moving towards the processing surface 11 when cut by the cutting line 2, so that the number of groups of positioning rollers 3, the number of cutting segments forming the processing surface 11, the transmission speed of the cutting line 2 into the processing surface 11 of the take-up and pay-off assembly, and the transmission speed of the cutting line 2 out of the processing surface 11 of the take-up and pay-off assembly can be pre-input to the multi-wire cutting machine, so that the total length of the cutting line 2 involved in winding the four positioning rollers 3 can be increased or decreased within a specified time to meet the rapid switching of the multi-wire cutting machine for cutting stone plates of the same thickness but different hardness; For cutting stone plates of different thicknesses, the adjusting rollers 4 provided with different numbers and spacings of line-pressing blocks 41 on the circumferential side can be simply pre-set by replacement. It should be noted that the number of cutting segments forming the processing surface 11 is greater than or equal to the number of cutting segments actually involved in cutting the stone rough material, so that the width of the stone rough material that can be cut by the cutting line 2 after the above assembly adjustment is maximized. Therefore, the two groups of adjusting rollers 4 abut against all cutting segments forming the processing surface 11 once or multiple times in each swing.

[0018] For example, Figure 7As shown, considering that the cutting line 2 is also continuously displaced by the transmission when the two groups of adjusting rollers 4 alternately allow the line blocks 41 on their circumferential sides to abut the cutting segments one by one, the state of the cutting line 2 can be stably alternated during the alternating switching by allowing the line blocks 41 of the next group abutting the cutting segments to be adjacent to the cutting segments abutted by the line blocks 41 of the previous group. That is, the cutting segments abutted by the line blocks 41 on the previous group of adjusting rollers 4 and the cutting segments abutted by the line blocks 41 on the next group of adjusting rollers 4 are adjacent in their projected positions on the processing surface 11.

[0019] like Figure 2 、 Figure 5 as well as Figure 7 As shown, in this embodiment, the swing assembly 5 includes an extension bar 51, a slider 52, a first positioning rod 53, a second positioning rod 54, a driving member 55 and a base 56, which are equal in number to the adjusting roller 4. The base 56 is fixedly arranged on the frame 1, and one end of the extension bar 51 and the base 56 are rotatably connected to the first positioning rod 53. A slider 52 is slidably provided on the extension bar 51, and the output end of the slider 52 and the driving member 55 are rotatably connected through the second positioning rod 54. The end of the extension bar 51 away from the first positioning rod 53 and the slider 52 is fixed to the adjusting roller 4. The fixing of the extension bar 51 to the adjusting roller 4 is specifically formed by abutting at one end and abutting a limit block at the other end through a plurality of nuts. After removing the plurality of nuts, the limit block and the adjusting roller 4 can be removed in sequence, thereby replacing the adjusting roller 4 with a different number of abutment blocks 41 and then reinstalling the upper limit block and the plurality of nuts. In order to ensure that the first group of adjusting rollers 4 contacting the cutting segments can stably and orderly lift the several cutting segments during the initial swing, the two adjusting rollers 4 of each group are symmetrically distributed on both sides of the processing surface 11. The angle formed between the axis of the adjusting rollers 4 of the first group contacting the cutting segments and the processing surface 11 is on the same side where the speed of the cutting line 2 entering the processing surface 11 of the pay-off and take-up assembly is increased separately, or on the same side where the speed of the cutting line 2 leaving the processing surface 11 of the pay-off and take-up assembly is decreased separately, or on the side where the change is greater when both speed changes are carried out. Taking into account that the speed of the cutting line 2 leaving the processing surface 11 is usually not significantly reduced in order to increase the length of the cutting line 2 involved in winding the positioning roller 3, because this will reduce the average transmission speed of the cutting line 2 in the processing surface 11 during this period, which will indirectly affect the cutting efficiency of the cutting section on the stone blank during this period. Therefore, the angle formed between the axis of the first group of adjusting rollers 4 abutting the cutting section and the processing surface 11 is usually on the same side of the position where the retractable wire assembly transmits the cutting line 2 into the processing surface 11, that is, the side where the cutting line 2 is accelerated to enter the processing surface 11.

[0020] like Figure 4As shown, in order to improve the transmission stability of the abutting block 41, the adjusting roller 4 with the abutting block 41 is also wrapped with rubber, so that the surface of the abutting block 41 is attached with a rubber structure. In order to make the contact between the abutting block 41 and the cutting segment more smooth, the vertical section of the abutting block 41 is arranged in a coaxial circular ring shape with the adjusting roller 4. Embodiment

[0021] Different from the first embodiment, the adjusting roller 4 is provided with six rollers and is divided into three groups. The angles formed between the axes of the three groups of adjusting rollers 4 abutting the cutting segment and the processing surface 11 are not all arranged on the same side. When the three groups of adjusting rollers 4 are sequentially swung by the driving of the swing assembly 5, one third of the cutting segments constituting the processing surface 11 can be away from the processing surface 11 at the same time. Compared with the first embodiment, the cutting segment bears more loads at the same time, which is suitable for cutting stone rough materials with relatively low hardness. Or two thirds of the cutting segments constituting the processing surface 11 can be away from the processing surface 11 at the same time. In order to make the one third of the cutting segments bear the cutting load at the same time, the swing rules of the three groups of adjusting rollers 4 need to be arranged in order. Specifically, the first group and the second group are synchronously swung, the first group and the third group are synchronously swung, the second group and the third group are synchronously swung, and then the first group and the third group are synchronously swung, which is one round of swing in order. Compared with the first embodiment, the cutting segment bears less load at the same time, which is suitable for cutting stone rough materials with relatively high hardness. In summary, when the number of groups of adjusting rollers 4 increases, the number of cutting segments away from the processing surface 11 at the same time can be increased, or the number of cutting segments participating in cutting stone rough materials at the same time can be increased. That is, the several groups of adjusting rollers 4 can be further grouped and swing in reciprocating motion at the same time when abutting the cutting segment in several rounds. The specific arrangement and adjustment are based on the actual needs.

[0022] A control method of a cutting wire of a multi-wire saw, for controlling a control device of a multi-wire saw as described above, according to the number F of cutting segments constituting the processing surface 11 and the number G of groups of positioning rollers 3, F / G number of abutting blocks 41 are installed on the adjusting roller 4 at equal intervals, the distance between the positions of the adjacent abutting blocks 41 abutting the cutting segment is G times the distance D between the adjacent cutting segments in the processing surface 11, and then according to the swing sequence preset by the swing assembly 5, several adjusting rollers 4 are sequentially connected with the swing assembly 5. The control method comprises the following steps: Step one: start the wire arranging motor 31, and at the same time, make the wire winding and unwinding assembly start to transmit the cutting wire 2 into and out of the processing surface 11 at the same speed; Step two: the transmission speed V1 of the wire winding and unwinding assembly for transmitting the cutting wire 2 into the processing surface 11 is greater than the transmission speed V2 of the wire winding and unwinding assembly for transmitting the cutting wire 2 out of the processing surface 11, and the adjustment roller 4 is swung by the swinging assembly 5, when the several abutting blocks 41 on the first group of adjustment rollers 4 all reach the limit swinging position in the abutting cutting segment state, V1 is equal to V2; The several groups of adjustment rollers 4 are driven by the swinging assembly 5 to swing for several rounds of preset sequence of reciprocating swinging, and at the same time, the material is started to be close to and cut through the cutting segment; Step three: when the cutting segment cuts to the predetermined position of the material, the relative position between the material and the processing surface 11 is kept, and after the several groups of adjustment rollers 4 all lose the abutment of the abutting blocks 41 to the cutting segment at least once, V1 is less than V2; After the several adjustment rollers 4 return to the state of not abutting the cutting segment, V1 is equal to V2; Step four: the wire arranging motor 31 is stopped, and the wire winding and unwinding assembly is stopped to transmit the cutting wire 2, and then the material can be separated from the processing surface 11; Wherein, the absolute value V3 of the difference between V1 and V2 in step two and step three is equal, the maximum change constant A of the total length of the cutting segment between the two positioning rollers 3 caused by the abutting blocks 41 on each group of adjustment rollers 4 abutting the cutting segment is determined, V3 and the number F / G of the abutting blocks 41 are combined, and the time T1 of the two V3 in step two and step three is calculated through the formula T1=F / G×A / V3, the time T2 of the several abutting blocks 41 on the first group of adjustment rollers 4 from the state of not abutting the cutting segment to all reaching the limit swinging position in the abutting cutting segment state, and T1 is started at the same time, and the swinging period T2 of the adjustment roller 4 is not less than the speed difference duration T1.

[0023] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the foregoing description, and it is intended to encompass all changes falling within the meaning and range of equivalents of the elements of the claims. Any reference signs in the claims should not be deemed to limit the claims involved.

[0024] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A control device for a multi-wire cutting machine cutting wire, comprising a frame, a wire take-up and pay-off assembly, four positioning rollers, and an adjustment mechanism. The positioning rollers are driven to rotate on the frame by a wire arrangement motor fixed to the frame. The wire take-up and pay-off assemblies are located at both ends of the frame and guide a whole cutting wire through the surfaces of the four positioning rollers at equal intervals before being transported from one end of the frame to the other. The cutting wire has several parallel cutting segments arranged on the same plane, and the cutting segments form a processing surface. The device is characterized by: The regulatory structure includes: Adjusting rollers are arranged on one side of the processing surface. There are several adjusting rollers divided into several groups. Several adjusting rollers in each group are distributed at both ends of the frame. Several abutment blocks are fixed on the circumference of the adjusting rollers at equal distances and in staggered positions on the adjusting rollers of different groups. A swing assembly is provided on the frame, the swing assembly can guide several groups of adjusting rollers to perform synchronous reciprocating swings within the group, and several abutment blocks on the adjusting rollers abut the cutting segments one by one by swinging, the swing assembly includes an extension bar, a slider, a first positioning rod, a second positioning rod, a driving member and a base, the base is fixedly provided on the frame, one end of the extension bar and the base are both rotatably connected to the first positioning rod, a slider is slidably provided on the extension bar, the slider is rotatably connected to the output end of the driving member through the second positioning rod, and one end of the extension bar away from the first positioning rod and the slider is fixed to the adjusting roller; The transmission speed of the cutting line of the retractable wire assembly for transmitting the cutting line into and out of the processing surface can be adjusted independently, and the swing range of the regulating roller can make its axis reach a position parallel to the processing surface.

2. The control device for cutting wires of a multi-wire saw according to claim 1, characterized in that: The plurality of cutting segments abutted by the line blocks on the upper set of adjusting rollers and the plurality of cutting segments abutted by the line blocks on the lower set of adjusting rollers are adjacent in their projection positions on the processing surface.

3. The control device for cutting wires of a multi-wire saw according to claim 2, characterized in that: The several adjusting rollers in each group are symmetrically distributed on both sides of the processing surface. The angle formed between the axis of the adjusting rollers of the first group abutting the cutting section and the processing surface is on the same side of the position where the retractable wire assembly transmits the cutting wire into the processing surface.

4. The control device for cutting wires of a multi-wire saw according to claim 1, characterized in that: The vertical section of the line-affecting block is in the shape of a circular ring coaxially arranged with the regulating roller.

5. The control device for cutting wires of a multi-wire saw according to claim 1, characterized in that: The pay-off and take-up assembly comprises two pay-off and take-up rollers for winding the cutting line, and a pay-off and take-up motor fixedly arranged on a frame for driving the pay-off and take-up rollers.

6. A method for controlling a cutting wire of a multi-wire saw, for controlling a cutting wire control device of a multi-wire saw according to any one of claims 1 to 5, characterized in that: According to the number F of cutting segments constituting the processing surface and the number G of positioning roller groups, a plurality of abutment blocks (number F / G) are equidistantly installed on the adjusting roller, and the distance between adjacent abutment blocks contacting the cutting segments is G times the distance D between adjacent cutting segments in the processing surface. Subsequently, according to the preset swing sequence of the swing assembly, a plurality of adjusting rollers are sequentially connected to the swing assembly. The control method includes the following steps: Step 1: Start the wire arrangement motor and make the wire take-up and pay-off components start to transmit the cutting wire into and out of the processing surface at the same speed; Step 2: Make the transmission speed V1 of the pay-off and take-up assembly transmitting the cutting line into the processing surface greater than the transmission speed V2 of the pay-off and take-up assembly transmitting the cutting line out of the processing surface, and at the same time make the swing assembly drive the adjusting roller to swing. When the several abutting blocks on the first group of adjusting rollers all reach the extreme swing position in the state of abutting the cutting section, make V1 equal to V2; Several groups of adjusting rollers are driven by the swing assembly to swing back and forth in a preset sequence for several rounds, and at the same time, the material begins to approach and pass through the cutting section for cutting; Step 3: When the cutting section cuts to the predetermined position of the material, the relative position of the material and the processing surface is maintained, and after several groups of adjusting rollers have caused the line block to lose contact with the cutting section at least once, V1 is made smaller than V2; After the plurality of adjusting rollers are restored to a state where none of them abuts against the cutting section, V1 is made equal to V2; Step 4: Stop the wire arrangement motor and stop the wire retracting and releasing assembly from transmitting the cutting wire, and then separate the material from the processing surface; Among them, the absolute value V3 of the difference between V1 and V2 in step 2 and step 3 is equal. The maximum change constant A in the total length of the cutting segment between the two positioning rollers is measured and determined because the line blocks on each group of adjusting rollers abut the same cutting segment. Combined with V3 and the number of line blocks F / G, the time T1 that V3 takes twice in step 2 and step 3 is calculated by formula T1=F / G×A / V3. The time T2 that the line blocks on the first group of adjusting rollers take from the state of not abutting the cutting segment to the extreme swing position when they all abut the cutting segment starts at the same time as T1, and the duration of the adjusting roller swing period T2 is not less than the speed difference duration T1.

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