A control method and control device for a multi-wire saw cutting wire

Abstract

The application discloses a kind of control method and control device of multi-wire cutting machine cutting line, belong to stone cutting equipment technical field, including rack, take and release wire subassembly, four positioning rollers and adjusting structure, adjusting structure includes several adjusting rollers and is divided into several groups, and swing subassembly is set on rack, several line blocks are fixedly arranged on the surface of adjusting roller at equal intervals and staggered distribution on the adjusting roller of different groups, and swing subassembly can guide several groups of adjusting roller to carry out synchronous reciprocating swing in group.This kind of control method and control device of multi-wire cutting machine cutting line of the application, by alternately abutting cutting section, realize the dynamic contact of cutting line and stone rough material, while guaranteeing the higher cutting efficiency of multi-wire cutting machine, effectively reduce the cutting load of cutting line.

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 around the surfaces of the four positioning rollers at equal intervals 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 machining surface, the adjusting structure comprises:

[0008] adjusting rollers arranged on one side of the machining 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 intervals on the circumferential sides and staggered on the adjusting rollers in different groups;

[0009] 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 and 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;

[0010] wherein the transmission speed of the take-up and pay-off assembly at the positions where the cutting wire enters and leaves the machining surface can be independently adjusted, and the swinging range of the adjusting roller can make the axis thereof reach a position parallel to the machining surface.

[0011] The present application is further provided that the projection positions of the cutting sections abutted by the wire abutting blocks on the adjusting rollers in the last group and the cutting sections abutted by the wire abutting blocks on the adjusting rollers in the next group are adjacent in the machining surface.

[0012] The present application is further provided that the adjusting rollers in each group are symmetrically distributed on both sides of the machining surface, and the included angle between the axis of the adjusting roller abutting the cutting section in the first group and the machining surface is on the same side of the position where the cutting wire enters the machining surface transmitted by the take-up and pay-off assembly.

[0013] The present application is further provided that the vertical section of the wire abutting block is in the form of a ring coaxial with the adjusting roller.

[0014] 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.

[0015] 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 the positioning roller, the number F / G of the line block is equidistantly installed on the adjusting roller, the distance of adjacent line block abutting the cutting section position is G times of the distance D between adjacent cutting sections in the 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:

[0016] Step one: start the wire arranging motor, and simultaneously make the take-up and pay-off assembly start to transmit cutting line into and out of the processing surface at the same speed;

[0017] 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 simultaneously 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 the cutting section, make V1 equal to V2;

[0018] The several groups of adjusting rollers are driven by the swing assembly to perform several rounds of preset sequence reciprocating swing, and simultaneously start to let the material approach and be cut through the cutting section;

[0019] 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 make V1 less than V2 after the several groups of adjusting rollers all let the line block lose abutment with the cutting section at least once;

[0020] After the several adjusting rollers restore to the state of not abutting the cutting section, make V1 equal to V2;

[0021] Step four: stop the wire arranging motor, and simultaneously make the take-up and pay-off assembly stop transmitting cutting line, and then the material can be separated from the processing surface;

[0022] Wherein, the absolute value V3 of the difference between V1 and V2 in step two and step three is equal in size, 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 several adjusting rollers with the same cutting section is determined by measurement, V3 and the number F / G of the line block are combined, and the time T1 of V3 in step two and step three is calculated by 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 is not less than the time length of the adjusting roller swing period T2.

[0023] In summary, the present invention has the following beneficial effects: by alternating contact between the cutting sections, dynamic contact between the cutting line and the stone block is achieved, which effectively reduces the cutting load of the cutting line while ensuring the high cutting efficiency of the multi-wire cutting machine. By allowing the equipment to increase or decrease the total length of the cutting line involved in winding the four positioning rollers within a specified time, the multi-wire cutting machine can quickly switch the operating state to cut stone slabs of the same thickness but different hardness. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of Example 1. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the cutting line, positioning roller, and oscillating assembly in Embodiment 1;

[0026] Figure 3 This is a schematic diagram of the structure of Example 1. Figure 2 ;

[0027] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0028] Figure 5 This is a schematic diagram of the structure of the adjusting roller and the swing assembly in Embodiment 1;

[0029] Figure 6 This is a cross-sectional view of the frame in Example 1;

[0030] Figure 7 for Figure 6 Enlarged view of point B in the middle.

[0031] In the diagram: 1. Frame; 11. Processing surface; 2. Cutting line; 3. Positioning roller; 31. Wire feeding motor; 4. Adjusting roller; 41. Wire blocking block; 5. Swing assembly; 51. Extension strip; 52. Slider; 53. First positioning rod; 54. Second positioning rod; 55. Drive component; 56. Base; 6. Take-up and unload roller; 61. Take-up and unload motor. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] A control device for cutting wire of a multi-wire saw, embodiment one:

[0034] As Figures 1 to 7 shown, including rack 1, take-up and pay-off assembly, four positioning rollers 3, vertically liftable worktable, tension control mechanism and adjustment structure, positioning rollers 3 are driven by wire arranging motor 31 fixedly arranged on rack 1 to rotate on rack 1, take-up and pay-off assembly is arranged at both ends of rack 1 and guides a whole cutting wire 2 to be wound around surfaces of four positioning rollers 3 at equal intervals and then transported from one end of rack 1 to the other end of rack 1, wherein, take-up and pay-off assembly includes two take-up and pay-off rollers 6 winding cutting wire 2 and take-up and pay-off motor 61 fixedly arranged on rack 1 for driving take-up and pay-off rollers 6, cutting wire 2 has a plurality of parallel cutting sections on the same plane, and a plurality of cutting sections form processing surface 11, tension control mechanism is arranged between take-up and pay-off rollers 6 and processing surface 11, and take-up and pay-off assembly and tension control mechanism adopt closed-loop feedback control mode for control, so as to ensure constant tension of cutting wire 2 during cutting process of processing surface 11, and tension control mechanism is a conventional technology of similar multi-wire saw, which will not be described here, rack 1 of similar multi-wire saw is fixed on the ground, and processing surface 11 is located at the position parallel to the surface of the worktable bearing stone rough material, after 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 from top to bottom by the cutting section to a preset depth, and usually in production, the depth of the stone rough material cut is not enough to cut it completely;

[0035] Wherein, adjustment structure includes four adjustment rollers 4 arranged between processing surface 11 and worktable and swing assembly 5 arranged on rack 1, four adjustment rollers 4 are divided into two groups, two adjustment rollers 4 in each group are distributed at both ends of rack 1, adjustment rollers 4 are fixedly provided with a plurality of line abutting blocks 41 at equal intervals on the circumferential side and staggered distributed on adjustment rollers 4 of different groups, taking 96 turns of cutting wire 2 winding around 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, swing assembly 5 can guide two groups of adjustment rollers 4 to groupwise reciprocating swing synchronously, and each reciprocating swing is performed for several rounds, and a plurality of line abutting blocks 41 on adjustment rollers 4 abut cutting sections one by one through swing, so that part of cutting wire 2 forming processing surface 11 is away from processing surface 11 at the same time, in this embodiment, half of the cutting sections will be away from processing surface 11 due to being lifted, and the half of the cutting sections participating in lifting alternately abut the other half of the cutting wire 2 cutting stone rough material at the same time due to the alternate abutting of two groups of adjustment rollers 4, the cutting sections abut stone rough material through alternate abutting, so as to effectively reduce the cutting load borne by cutting wire 2;

[0036] 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 wire 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 wire 2 into the processing surface 11 of the take-up and pay-off assembly is increased alone, or the transmission speed of the cutting wire 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 wire 2 involved in winding the four positioning rollers 3;

[0037] 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 wire 2, so the number of groups of positioning rollers 3 of the multi-wire cutting machine, the number of cutting segments forming the processing surface 11, the transmission speed of the cutting wire 2 into the processing surface 11 of the take-up and pay-off assembly, and the transmission speed of the cutting wire 2 out of the processing surface 11 of the take-up and pay-off assembly can be inputted to the multi-wire cutting machine, so that the total length of the cutting wire 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 hardnesses;

[0038] 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 wire 2 after the above-mentioned assembly adjustment is maximized. Therefore, the two groups of adjusting rollers 4 abut against all the cutting segments forming the processing surface 11 once or multiple times in each round of swing.

[0039] As Figure 7As shown, considering that when the two sets of adjusting rollers 4 alternately allow the abutment blocks 41 on their periphery to abut the cutting section, the cutting line 2 is also constantly being transported and displaced. Therefore, by making the abutment block 41 of the next set of abutting the cutting section adjacent to the cutting section abutted by the abutment block 41 of the previous set, the state of the cutting line 2 can be stably alternated during the alternation. That is, the cutting section abutted by the abutment block 41 on the previous set of adjusting rollers 4 and the cutting section abutted by the abutment block 41 on the next set of adjusting rollers 4 are adjacent in the projection position on the processing surface 11.

[0040] 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 drive member 55, and a base 56, all of the same number as the adjusting roller 4. The base 56 is fixedly mounted on the frame 1. One end of the extension bar 51 and the base 56 are rotatably connected to the first positioning rod 53. The slider 52 is slidably mounted on the extension bar 51. The output end of the slider 52 and the drive 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. Specifically, the fixing of the extension bar 51 to the adjusting roller 4 is formed by one end abutting against the other end abutting against a limit block through several nuts. After removing several 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 abutting blocks 41 and then reinstalling the limit block and several nuts.

[0041] To ensure that the first set of adjusting rollers 4, which abut against the cutting section, can stably and orderly lift several cutting sections during the initial oscillation, the two adjusting rollers 4 in each set are symmetrically distributed on both sides of the processing surface 11. The angle formed between the axis of the first set of adjusting rollers 4 abutting against the cutting section and the processing surface 11 is either on the same side where the speed of the take-up and untake-down assembly increases when the cutting line 2 enters the processing surface 11, or on the same side where the speed of the take-up and untake-down assembly decreases when the cutting line 2 leaves the processing surface 11, or on the side where both speed changes occur more significantly. Considering that the speed at which the cutting line 2 leaves the processing surface 11 is not usually significantly reduced in order to increase the length of the cutting line 2 participating in the winding positioning roller 3, as this would reduce the average transmission speed of the cutting line 2 within the processing surface 11 during this period, indirectly affecting the cutting efficiency of the cutting segment on the stone block during this period, the angle formed between the axis of the first set of adjusting rollers 4 that abuts the cutting segment and the processing surface 11 is usually on the same side of the position where the take-up and unwinding assembly transmits the cutting line 2 into the processing surface 11, that is, the side where the cutting line 2 is accelerated into the processing surface 11.

[0042] 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

[0043] Different from the first embodiment, the adjusting roller 4 is provided with six 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, the one-third of the cutting segments constituting the processing surface 11 can be in a position away from the processing surface 11 at the same time. Compared with the first embodiment, the cutting segment bears more load at the same time, which is suitable for cutting stone rough materials with relatively low hardness.

[0044] Or the two-thirds of the cutting segments constituting the processing surface 11 can be in a position 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 orderly arranged. 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 a total of one round and is orderly swung. 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.

[0045] 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 swung reciprocally at the same time when abutting the cutting segment in several rounds. The specific arrangement and adjustment are made according to the actual needs.

[0046] A control method of a cutting wire of a multi-wire cutting machine, which is used to control the control device of the cutting wire of the multi-wire cutting machine. According to the number F of the cutting segments constituting the processing surface 11 and the number G of the groups of the positioning rollers 3, F / G number of abutting blocks 41 are equidistantly installed on the adjusting roller 4. The distance between the positions of the adjacent abutting blocks 41 abutting the cutting segment is G times of the distance D between the adjacent cutting segments in the processing surface 11. Then, according to the swing sequence preset by the swing assembly 5, the several adjusting rollers 4 and the swing assembly 5 are sequentially connected. The control method comprises the following steps:

[0047] 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;

[0048] Step two: the transmission speed V1 of the wire feeding and winding assembly for transmitting the cutting wire 2 into the processing surface 11 is greater than the transmission speed V2 of the wire feeding and winding assembly for transmitting the cutting wire 2 out of the processing surface 11, and the swing assembly 5 drives the adjusting roller 4 to swing, when the several abutting blocks 41 on the first adjusting roller 4 reach the limit swing position in the state of abutting the cutting section, V1 is equal to V2;

[0049] The several groups of adjusting rollers 4 are driven by the swing assembly 5 to swing in a preset sequence for several rounds, and at the same time, the material is allowed to approach and cut through the cutting section;

[0050] Step three: when the cutting section 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 adjusting rollers 4 all lose abutment with the cutting section at least once, V1 is less than V2;

[0051] After the several adjusting rollers 4 return to the state of not abutting the cutting section, V1 is equal to V2;

[0052] Step four: stop the wire arranging motor 31, and then stop the wire feeding and winding assembly to transmit the cutting wire 2, and then the material can be separated from the processing surface 11;

[0053] In step two and step three, the absolute value V3 of the difference between V1 and V2 is equal, the maximum change constant A of the total length of the cutting section between the two positioning rollers 3 caused by the abutting block 41 on each group of adjusting rollers 4 abutting the cutting section is determined, V3 and the number F / G of the abutting block 41 are combined, and the time T1 of 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 adjusting roller 4 from the state of not abutting the cutting section to the limit swing position of abutting the cutting section is calculated, T1 and T2 start at the same time, and the swing period T2 of the adjusting roller 4 is not less than the speed difference duration T1.

[0054] 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 all changes falling within the meaning and range of equivalents of the claims are intended to be encompassed by the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

[0055] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature described. The specification can include implicit combinations of explicitly mentioned features and / or explicit combinations of implicitely mentioned features. Each embodiment depends on the explicit combinations of features and / or the implicit combinations of features made specifically within that embodiment, and each such embodiment can be combined with every other such embodiment to create further embodiments.

Claims

1. A control device for the cutting wire of a multi-wire cutting machine, comprising a frame, a take-up and untake-up assembly, four positioning rollers, and an adjustment structure, wherein the positioning rollers are driven to rotate on the frame by a wire feeding motor fixedly mounted on the frame, the take-up and untake-up assembly is disposed at both ends of the frame, and guides a whole cutting wire to be wound equidistantly around the surfaces of the four positioning rollers before being conveyed from one end of the frame to the other end of the frame, wherein the cutting wire has a plurality of parallel cutting segments arranged on the same plane, and the plurality of cutting segments form a processing surface, characterized in that: The adjusting structure comprises: adjusting rollers arranged on one side of the processing surface, a plurality of adjusting rollers arranged in a plurality of groups, a plurality of adjusting rollers in each group being arranged at both ends of the frame, and a plurality of abutting blocks being fixedly arranged on the circumferential side of the adjusting rollers at equal intervals and staggered on the adjusting rollers of different groups; a swing assembly arranged on the frame, the swing assembly being capable of guiding the adjusting rollers of the plurality of groups to synchronously swing in the group, the plurality of abutting blocks on the adjusting rollers being abutted on the cutting sections one by one through the swing, the swing assembly comprising extension bars, sliding blocks, first positioning rods, second positioning rods, driving members and a base, the base being fixedly arranged on the frame, one end of each of the extension bars being rotatably connected with the first positioning rods, the sliding blocks being slidably arranged on the extension bars, the sliding blocks being rotatably connected with the output ends of the driving members through the second positioning rods, and one end of each of the extension bars away from the first positioning rods and the sliding blocks being fixedly connected with the adjusting rollers; wherein the transmission speed of the take-up and pay-off assembly for transmitting the cutting line into and out of the processing surface position can be independently adjusted, and the swing range of the adjusting rollers can make the axis thereof reach a position parallel to the processing surface.

2. The control device of the cutting string of the multi-wire saw according to claim 1, characterized in that: The projection positions of the cutting sections abutted by the abutting blocks on the adjusting rollers of the last group and the cutting sections abutted by the abutting blocks on the adjusting rollers of the next group are adjacent in the processing surface.

3. The control device of a cutting string of a multi-wire saw according to claim 2, characterized in that: The adjusting rollers of each group are symmetrically arranged on both sides of the processing surface, 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 take-up and pay-off assembly transmits the cutting line into the processing surface.

4. The control device of a cutting string of a multi-wire saw according to claim 1, characterized in that: The vertical cross section of the abutting block is in the shape of a ring coaxially arranged with the adjusting roller.

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

6. A method for controlling a multi-wire saw cutting wire for a control device of a multi-wire saw cutting wire as claimed in any one of claims 1 to 5, characterized in that: According to the number F of the cutting sections constituting the processing surface and the number G of the groups of the positioning rollers, F / G abutting blocks are equally arranged on the adjusting rollers, the distance between the positions of the adjacent abutting blocks abutting the cutting sections is G times the distance between the adjacent cutting sections in the processing surface, and then according to the preset swing sequence of the swing assembly, the adjusting rollers and the swing assembly are sequentially connected, and the control method comprises the following steps: Step one: start the take-up and pay-off motor, and at the same time, make the take-up and pay-off assembly start transmitting the 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 for transmitting the cutting line into the processing surface greater than the transmission speed V2 of the take-up and pay-off assembly for transmitting the cutting line out of the processing surface, and at the same time, make the swing assembly drive the adjusting rollers to swing, when the abutting blocks on the adjusting rollers of the first group all reach the limit swing position in the state of abutting the cutting sections, make V1 equal to V2; the adjusting rollers of the plurality of groups are driven by the swing assembly to swing in the preset sequence for a plurality of rounds, and at the same time, the material starts to approach and is cut by the cutting sections; Step three: when the cutting sections cut the material to the predetermined position, the relative position between the material and the processing surface at this time is kept, and after the abutting blocks of the adjusting rollers of the plurality of groups lose abutment on the cutting sections at least once, make V1 less than V2. After several adjusting rollers are restored to the state of not abutting against the cutting section, V1 is equal to V2; Step four: stop the wire arranging motor, and simultaneously make the take-up and pay-off assembly stop transmitting the cutting wire, 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, the maximum change constant A of the total length of the cutting section between the two positioning rollers caused by the abutting of the line abutting blocks on each group of adjusting rollers is determined, V3 and the number of line abutting blocks F / G are combined, and the time T1 of V3 in step two and step three is calculated through the formula T1=F / G×A / V3, the time T2 of the line abutting blocks on the first group of adjusting rollers from the state of not abutting against the cutting section to the extreme swing position of abutting against the cutting section is calculated, T2 is started at the same time as T1, and the swing period T2 of the adjusting roller is not less than the speed difference duration T1.

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