Wire sawing apparatus and wire sawing method

Abstract

The application discloses a wire cutting device and a wire cutting method, and the wire cutting device comprises a base, a cutting assembly, a supporting assembly and a controller which is configured to control a rotating driving assembly and a cutting assembly switch; the cutting process comprises a rotating cutting stage and a straight-line cutting stage; the controller controls the rotating driving assembly and the cutting assembly to be turned on, the workpiece rotates around its own axis, relative motion is generated between the high-speed rotating cutting wire and the self-rotating workpiece, and the workpiece is in the rotating cutting stage; the workpiece is cut to a predetermined position, the controller controls the rotating driving assembly to be turned off, relative motion is generated between the high-speed rotating cutting wire and the workpiece, the workpiece starts the straight-line cutting stage, and the rotating cutting reduces the contact force between the workpiece and the cutting wire, is favorable for improving the machining quality of the cut end face and reducing the machining time; in the later cutting stage, the rotating cutting stage is converted into the straight-line cutting stage, which is favorable for avoiding workpiece fracture when the workpiece allowance is small and ensuring machining stability.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of processing equipment, in particular to a wire cutting device and a wire cutting method. BACKGROUND

[0002] Compared with traditional knife saw blades, grinding wheel segments and internal circular cutting, the wire cutting technology has the advantages of high efficiency, high productivity and high precision. The principle is to rub the workpiece to be processed by the high-speed moving cutting wire to achieve the purpose of cutting.

[0003] During the cutting process, the cutting wire forms a wire saw on the rack under the action of the cutting wheel, and the workpiece to be processed and the rack arranged with the cutting wire move relatively to realize the cutting of the workpiece by the wire saw.

[0004] The existing cutting machine generally uses a single station for cutting, which has low cutting efficiency. In the cutting process, the cutting wire and the workpiece form a line contact in the cutting area. In the case of a circular workpiece, the contact length of the cutting wire and the workpiece changes, resulting in changes in the stress of the diamond wire and fluctuations in the tension of the wire, which adversely affects the processing surface and results in poor cutting surface quality. The broken edge of the workpiece is easily formed at the broken edge of the workpiece cut by the diamond wire. SUMMARY

[0005] The purpose of the present application is to provide a wire cutting device and a wire cutting method to solve the technical problems of low cutting efficiency, poor cutting surface quality and easy to produce broken edge of the traditional cutting machine in the prior art.

[0006] To achieve the above-mentioned purpose of the application, the following technical solutions are adopted:

[0007] The present application provides a wire cutting device, which comprises:

[0008] a base;

[0009] a cutting assembly movable relative to the workpiece to realize cutting, comprising a rack and a cutting wheel set for winding the cutting wire, the cutting wheel set being rotatably connected to one side of the rack;

[0010] a support assembly for supporting the workpiece, the support assembly comprising at least a feeding support, a rotating support and a discharging support arranged in sequence on the base, the rotating support being formed with a first rotating shaft sleeve, the first rotating shaft sleeve being connected with a rotating driving assembly capable of driving the first rotating shaft sleeve to rotate, so that the first rotating shaft sleeve drives the workpiece to rotate around its own axis.

[0011] In some embodiments of the present application, at least one set of support disc seats is arranged between the feeding support and the rotating support.

[0012] In some embodiments of the present application, the feeding support, the rotating support and the support disc base are movably connected to the base for adjusting the cutting length.

[0013] In some embodiments of the present application, two or more sets of the cutting assembly are movably connected to the base, and the cutting assemblies are arranged along a straight line direction on the base.

[0014] In some embodiments of the present application, a second rotating shaft sleeve is rotatably connected to the feeding support, and a chuck is arranged in the first rotating shaft sleeve and the second rotating shaft sleeve, and the chuck forms a hollow connecting portion, and the workpiece is located in the connecting portion.

[0015] In some embodiments of the present application, the rotating drive assembly comprises a driving member and a transmission member, and the driving member is fixed to the base and connected to the first rotating shaft sleeve through the transmission member.

[0016] In some embodiments of the present application, a feeding assembly is further provided, which comprises a feeding drive part fixed to the base and a feeding member connected to the feeding drive part, and the feeding member is detachably connected to the end of the workpiece for driving the workpiece to feed along the axial direction to a preset cutting position.

[0017] In another aspect, the present application further provides a wire cutting method, which comprises a rotating cutting stage and a straight line cutting stage.

[0018] The wire cutting device further comprises a controller configured to control the rotating drive assembly and the cutting assembly.

[0019] Rotating cutting stage: the controller controls the rotating drive assembly and the cutting assembly to be turned on, and the workpiece rotates around its own axis under the action of the rotating drive assembly, and the relative motion is generated between the high-speed rotating cutting wire and the rotating workpiece.

[0020] Straight line cutting stage: when the workpiece is cut to a certain position, the controller controls the rotating drive assembly to be turned off, and the workpiece stops rotating, and the relative motion is continued between the high-speed rotating cutting wire and the workpiece until the workpiece is cut off.

[0021] In some embodiments of the present application, the controller controls the conversion position of the rotating cutting stage and the straight line cutting stage by controlling the cutting time, and the actual cutting depth P of the workpiece and the cutting time t satisfy the following relationship:

[0022] P=C1t;

[0023] Wherein, C1 is a coefficient obtained by experiment.

[0024] In some embodiments of the present application, the controller obtains the actual cutting depth P of the workpiece by directly monitoring the torque T of the cutting drive, and when the set cutting depth is reached, the rotary cutting stage is switched to the linear cutting stage, and the actual cutting depth P of the workpiece and the torque T of the cutting drive satisfy:

[0025]

[0026] Wherein, r is the radius of the workpiece, K f is the relationship coefficient of force and material removal rate, C2 is the relationship coefficient of material removal rate and contact arc length, is the coefficient between the torque T of the cutting drive and the feed direction load F f .

[0027] Compared with the prior art, the advantages and positive effects of the present application are:

[0028] The wire cutting device involved in the present application combines the rotary cutting stage and the linear cutting stage, at the beginning, the rotary cutting stage is realized through the self-rotation of the workpiece, and after cutting to a certain position, the self-rotation of the workpiece is stopped, and the linear cutting stage is started until the complete cutting is completed.

[0029] The contact between the cutting wire and the workpiece in the rotary cutting mode is point contact, which greatly reduces the contact force between the workpiece and the cutting wire, and is beneficial to improve the machining quality of the cut end surface and reduce the machining time.

[0030] According to the size and material of the workpiece and other factors, the rotary cutting stage is converted to the linear cutting stage at the predetermined cutting position of the workpiece, and the workpiece stops rotating, which is beneficial to avoid the workpiece from breaking when the workpiece allowance is small, ensure the machining stability, and avoid risks.

[0031] Other features and advantages of the present application will become more apparent after reading the specific embodiments of the present application in combination with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0033] Figure 1 is a three-dimensional structure schematic diagram of an embodiment of the single-station cutting device proposed in the present application;

[0034] Figure 2is a front view of an embodiment of the single-station cutting device proposed by the present invention;

[0035] Figure 3 is a side view of the cutting assembly structure;

[0036] Figure 4 is a perspective view of the rotating support;

[0037] Figure 5 is a front view of the rotating support;

[0038] Figure 6 is Figure 5 is a cross-sectional view of A-A in

[0039] Figure 7 is a perspective view of the feeding support;

[0040] Figure 8 is a perspective view of the feeding support;

[0041] Figure 9 is a perspective view of an embodiment of the wire cutting device with multiple cutting assemblies;

[0042] Figure 10 is Figure 9 is an enlarged view of B in

[0043] Figure 11 is a schematic view of the relative position between the support disc seat and the workpiece in the rotary cutting stage;

[0044] Figure 12 is a schematic view of the relative position between the support disc seat and the workpiece in the linear cutting stage;

[0045] Figure 13 is a top view of an embodiment of the multi-station cutting device;

[0046] Figure 14 is a schematic view of the relative position between the cutting wire and the workpiece in the rotary cutting stage;

[0047] Figure 15 is a schematic view of the relative position between the cutting wire and the workpiece in the linear cutting stage;

[0048] Figure 16 is a schematic view of the cutting geometry

[0049] Figure 17 is a cutting flowchart;

[0050] in the figure,

[0051] 100, base;

[0052] 110, first guide part;

[0053] 200, cutting assembly;

[0054] 210, frame;

[0055] 220, driving wheel;

[0056] 230, driven wheel;

[0057] 240, tension wheel;

[0058] 250, adjusting member;

[0059] 260, cutting line;

[0060] 300, blank supporting member;

[0061] 310, blank supporting frame;

[0062] 320, clamp; 321, clamping jaw;

[0063] 400, rotating supporting member;

[0064] 410, rotating supporting frame;

[0065] 420, first rotating shaft sleeve;

[0066] 430, rotating driving assembly; 431, driving member; 432, transmission member;

[0067] 500, feeding supporting member;

[0068] 510, feeding supporting frame;

[0069] 520, second rotating shaft sleeve;

[0070] 600, workpiece;

[0071] 700, chuck; 701, connecting portion; 710, fastening portion;

[0072] 800, supporting disc seat;

[0073] 810, supporting base frame; 811, supporting inclined surface;

[0074] 820, feeding crystal holder; 830, fixed crystal holder;

[0075] 900, feeding assembly. DETAILED DESCRIPTION

[0076] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0077] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood 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 cannot be understood as limiting the present application.

[0078] The terms "first", "second" are only for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0079] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or direct connection, or indirect connection through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0080] In the present application, unless otherwise explicitly specified and limited, the first feature "above" or "below" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the horizontal height of the first feature is less than that of the second feature.

[0081] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplifying the present application, the components and arrangements of the specific examples are described in the following. Of course, they are only examples and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to the same reference numerals and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, which does not indicate the relationship between the various embodiments and / or arrangements discussed.

[0082] As shown in Figures 1-3 , the application provides a wire cutting device, which comprises a base 100, a cutting assembly 200 and a supporting assembly arranged on the base 100, the cutting assembly 200 comprises a rack 210 connected to the base 100 or fixed separately, a cutting wheel set rotatably connected to one side of the rack 210, and a cutting wire 260 wound around each cutting wheel set.

[0083] The supporting assembly is used to support the workpiece 600 and drive the workpiece 600 to rotate around its own axis, and comprises a feeding supporting member 500, a rotating supporting member 400 and a discharging supporting member 300 arranged in sequence along a straight line on the base 100.

[0084] The feeding supporting member 500, the rotating supporting member 400 and the discharging supporting member 300 are all formed with a supporting position for supporting the workpiece 600, the workpiece 600 is connected in the supporting position, the cutting assembly 200 is located between the rotating supporting member 400 and the discharging supporting member 300, and the workpiece 600 between the rotating supporting member 400 and the discharging supporting member 300 is cut.

[0085] Referring to Figures 4-6 , the rotating supporting member 400 not only provides support for the workpiece 600, but also provides power for the rotation of the workpiece 600, so that the workpiece 600 can rotate around its own axis.

[0086] Referring to Figure 3 , the cutting wheel set comprises a driving wheel 220, a driven wheel 230 and a tension wheel 240, the tension wheel 240 is connected to an adjusting member 250 outside, which is used to adjust the tension of the cutting wire 260.

[0087] The driving wheel is connected to a cutting driving member, the cutting driving member is connected to a controller, the controller controls the switching of the cutting driving member, and the driven wheel 230 provides auxiliary support for the cutting wire 260.

[0088] The rack 210 is formed with an avoiding opening, and the cutting wire 260 forms a cutting section through the avoiding opening.

[0089] Under the drive of the cutting wheel set, the cutting wire 260 rotates at high speed, and the workpiece 600 moving relative to each avoiding opening is cut into multiple sections by the cutting wire 260 synchronously.

[0090] The cutting assembly 200 can be horizontal or vertical. In the horizontal state, the workpiece 600 is located on the left or right side of the annular cutting line 260. In the vertical state, the workpiece 600 is located on the upper or lower side of the annular cutting line 260.

[0091] Correspondingly, the opening position of the avoidance opening can be on the upper or lower side or the side of the rack 210. The relative movement between the workpiece 600 and the cutting assembly 200 is vertical or horizontal.

[0092] The relative movement process can be that the cutting assembly 200 is fixed and the workpiece 600 moves, or the workpiece 600 is fixed and the cutting assembly 200 moves.

[0093] Taking the vertical movement of the relative movement between the workpiece 600 and the cutting assembly 200, the fixed position of the workpiece 600, and the up-down movement of the cutting assembly 200 as an example, the multi-station cutting device is described in detail:

[0094] The avoidance opening of each rack 210 is located at the bottom of the corresponding rack 210, and the opening faces downward. Before cutting, the workpiece 600 is fixed below the avoidance opening through the support frame.

[0095] With the synchronous lifting movement of the cutting assembly 200, the avoidance opening is lifted, and the workpiece 600 is cut into multiple sections at the corresponding position.

[0096] The lifting and cutting process of the cutting assembly 200 can be realized through a lifting mechanism (not shown). The lifting mechanism is also connected with the controller, and the lifting process is controlled through the controller. This part is not the design focus of the application, and will not be described here.

[0097] Reference Figures 4-6 The rotating support 400 includes a rotating support 410 and a first rotating shaft sleeve 420 rotatably connected to the rotating support 410. The first rotating shaft sleeve 420 is connected with a rotating driving assembly 430. The rotating driving assembly 430 drives the first rotating shaft sleeve 420 to rotate, and in turn drives the workpiece 600 installed in the first rotating shaft sleeve 420 to rotate.

[0098] The rotating driving assembly 430 includes a driving member 431 and a transmission member 432. The driving member 431 is fixed on the rotating support 410 and is connected with the first rotating shaft sleeve 420 through the transmission member 432.

[0099] The transmission member 432 can be a belt structure or a speed reducer structure.

[0100] Reference Figure 7 The feeding support 500 includes a feeding support 510 and a second rotating shaft sleeve 520 rotatably connected in the feeding support 510. The workpiece 600 is connected in the second rotating shaft sleeve 520.

[0101] Reference Figure 8 The blanking support 300 can be designed in other structural forms as long as it has the same structure as the feeding support 500.

[0102] In some embodiments of the present application, the blanking support 300 comprises a blanking support 310 and a clamp 320.

[0103] The clamp 320 is rotatably connected to one side of the blanking support 310, and a plurality of clamping jaws 321 are formed on the clamp 320 to fix one end of the workpiece 600 through the clamping jaws 321.

[0104] In addition to supporting the cut short workpiece 600, the blanking support 300 can also provide power for the rotation of the workpiece 600. The clamp 320 is externally connected to an auxiliary driving part for driving the rotation of the clamp 320.

[0105] The rotation driving assembly 430 and the auxiliary driving part are both electrically connected to the controller, and the controller controls the rotation driving assembly 430 and the auxiliary driving part to start and stop synchronously, thereby ensuring the synchronization of the rotation of the workpiece 600 in each cutting section.

[0106] The cutting assembly 200 cuts the workpiece 600 between the rotation support 400 and the blanking support 300, and the cut short workpiece 600 is supported and fixed by the blanking support 310.

[0107] The present application also proposes a wire cutting method, which comprises a rotary cutting phase and a linear cutting phase.

[0108] The wire cutting device further comprises a controller configured to control the rotation driving assembly 430 and the cutting assembly 200 to switch on and off.

[0109] Reference Figures 14-15 In the cutting start state, the controller controls the rotation driving assembly 430 and the cutting assembly 200 to start, the workpiece 600 rotates around its own axis, the high-speed rotary cutting wire 260 produces relative motion with the rotating workpiece 600, and the workpiece 600 is in the rotary cutting phase.

[0110] When the workpiece 600 is cut to a predetermined position in the rotary cutting phase, the controller controls the rotation driving assembly 430 to stop, the high-speed rotary cutting wire 260 produces relative motion with the workpiece 600, and the workpiece 600 is in the linear cutting phase.

[0111] The position Q on the cross section of the workpiece from the rotary cutting phase to the linear cutting phase is defined.

[0112] The actual cutting depth of the workpiece 600 from the start of the rotary cutting to the position Q is P, and P satisfies:

[0113] P=C1t;

[0114] Wherein, C1 is a coefficient, which can be obtained by experiment, multiple experiments can obtain the relationship between cutting time t and actual cutting depth P of workpiece 600, and then the controller controls the conversion position Q of the rotary cutting stage and the linear cutting stage by controlling the cutting time.

[0115] By directly monitoring the torque T of the cutting drive, the actual cutting depth P of the workpiece 600 is further known.

[0116] According to the following formula, the conversion time of the rotary cutting stage and the linear cutting stage, according to the geometric relationship in the cutting process, the cutting feed amount S of the cutting assembly 200 relative to the workpiece 600 satisfies:

[0117] S=h+P;(1)

[0118] Wherein, h is the deformation of the cutting line, that is, the line bow.

[0119] h and the load F of the cutting line in the feed direction f Approximately linear relationship:

[0120] Satisfies: h=k*F f ;(2)

[0121] Wherein, k is the stiffness of the cutting line;

[0122] The load F in the feed direction f Satisfies:

[0123]

[0124] K f Is the relationship coefficient of force and material removal rate, which can be obtained by experiment;

[0125] C2 is the relationship coefficient of material removal rate and contact arc length, which can be obtained by experiment;

[0126] F f Also proportional to the cutting force Fc received by the cutting line 260, F f =C3*Fc;(4)

[0127] Fc and the torque T of the output shaft of the cutting drive are proportional, T=C4*Fc;(5)

[0128] C3 and C4 are both proportional coefficients, which can be obtained by experiment.

[0129] From the above formulas (1)-(5):

[0130] The actual cutting depth P of the workpiece and the torque T of the cutting drive:

[0131]

[0132] The torque T of the cutting drive can be monitored in real time through the display, and the user can control the actual cutting depth P of the workpiece according to the selected workpiece i The torque T of the cutting drive corresponding to the workpiece is calculated i , and then when the torque of the cutting drive reaches T i , the controller controls the rotation driving assembly 430 to stop, at which time the rotation cutting stage is switched to the straight line cutting stage.

[0133] Thus, the user can accurately control the cutting position of the rotation cutting stage to the straight line cutting stage according to the cutting quality of the workpiece 600, and the intelligent degree is higher.

[0134] In the rotation cutting mode, the contact between the cutting line 260 and the workpiece 600 is point contact, which greatly reduces the contact force between the workpiece 600 and the cutting line 260, and is beneficial to improve the machining quality of the cut end surface and reduce the machining time.

[0135] In the initial cutting stage, the workpiece 600 rotates at a low speed and can drive the rotation of different workpieces 600 under the driving of the rotation support 400.

[0136] When the cutting line 260 cuts into the workpiece 600 to a certain depth, since the material diameter at the cutting seam is small, continuing to drive the workpiece 600 to rotate by the rotation support 400 is easy to be broken at the cutting opening under the action of the rotation resistance. At this time, the rotation should be stopped in advance, and the cutting line 260 continues to cut the workpiece 600 in the cutting seam to realize straight feed cutting until cutting off.

[0137] It is beneficial to avoid the workpiece 600 from being broken due to excessive torque during the rotation of the workpiece 600 when the excess amount of the workpiece 600 is small, and is beneficial to ensure the machining stability, avoid the risk of core collapse, and improve the machining quality.

[0138] In some embodiments of the present application, referring again to Figure 6 , Figure 7 , in order to facilitate the connection and disassembly between the workpiece 600 and the shaft sleeve, a chuck 700 is arranged in the first rotation shaft sleeve 420 and the second rotation shaft sleeve 520, and a hollow connecting portion 701 is formed in the chuck 700.

[0139] Specifically, a fastening portion 710 is further formed in the connecting portion 701 of the chuck 700, which is used to clamp the workpiece 600 in the connecting portion 701. In the cutting state, the fastening portion 710 connects and fixes the workpiece 600 to the chuck 700, and after the machining is completed, the fastening portion 710 releases the workpiece 600.

[0140] The chuck 700 can be pneumatic, hydraulic or electric.

[0141] The feeding support 500 can not only provide support for the workpiece 600, but also move linearly relative to the base 100 to realize feeding of the workpiece 600.

[0142] The feeding support 500 is controlled to move linearly by a feeding driving part, which includes a motor and a screw structure connected to an output end of the motor. Correspondingly, a threaded hole is formed below the feeding support 500 to match the screw structure. The motor drives the screw to rotate, and then drives the feeding support 500 to move along the length direction of the screw under the threaded cooperation.

[0143] The feeding driving part can also be a hydraulic cylinder or an electric push rod or other power structures.

[0144] In order to improve the stability of the feeding support 500 during movement, a moving track 110 is formed on the base 100 along the length direction of the workpiece 600. The bottom of the feeding support 500, the rack 210 and the rotating support 400 is formed with a guide part matching the moving track 110. During feeding, the feeding support 500 drives the workpiece 600 to feed along the first guide part 110.

[0145] The base 100 is also formed with a size mark along the length direction of the moving track to improve the accuracy of the position.

[0146] During feeding, the chuck 700 on the rotating support 400 is loosened so that the workpiece 600 can freely pass through it. The feeding driving part is opened to push the feeding support 500 to move forward, feed the workpiece 600 along its axial direction, and connect the front end of the workpiece 600 to the falling support 300.

[0147] In order to make the feeding process more convenient, reduce wear and save driving force during feeding, a rolling part can be rotatably connected in the connecting part 701 of the rotating support 400 and the feeding support 500 along the feeding direction of the workpiece 600. The rolling part is a ball structure.

[0148] Before cutting, the feeding driving part drives the feeding support 500 to move forward along the base 100, pushes the workpiece 600 to move in the connecting part 701 of the rotating driving assembly 430, and the rolling part can make the workpiece 600 feeding process more convenient, reduce wear and save driving force during feeding.

[0149] During the rotating cutting process, the workpiece 600 rotates under the action of the rotating driving assembly 430, the cutting line 260 enters from a point of the workpiece 600, and the torque of the cutting driving part reaches T i At this time, the cutting line 260 reaches the preset rotating cutting stage and linear cutting stage conversion position Q, and the actual cutting depth of the workpiece reaches P iThe controller controls the rotary driving assembly 430 to stop and switch from the rotary cutting stage to the linear cutting stage.

[0150] The point contact processing mode of the rotary processing optimizes the material removal effect of the cutting contact area, which is beneficial to reducing the cutting force per unit of material and improving the processing precision. The finishing processing of the abrasive grains on the cutting section of the workpiece 600 is realized by multiple contacts between the cutting section and the cutting line 260.

[0151] In some embodiments of the present application, the wire cutting device further comprises a feeding assembly 900, which comprises a feeding driving part fixed on the base 100 and a feeding piece connected with the feeding driving part. The feeding piece is a push rod structure and is connected with the end of the workpiece 600. The feeding driving part drives the push rod to move along the axial direction of the workpiece 600, so as to push the workpiece 600 to the target position.

[0152] Reference Figures 9-13 In some embodiments of the present application, the base 100 is provided with a plurality of sets of cutting assemblies 200 which are arranged along the linear direction at intervals. The cutting assemblies 200 can be adjusted by moving along the base 100. The bottom of each set of cutting assemblies 200 is also provided with a guide part which is matched with the moving guide rail 110, so as to adjust the cutting position.

[0153] The racks 210 on each set of cutting assemblies 200 can be lifted or lowered individually, so as to realize the individual cutting of the workpiece 600. Of course, the controller can also control the synchronous lifting or lowering of the racks 210, so as to perform the synchronous cutting of different positions of the workpiece 600 and improve the work efficiency.

[0154] The support assembly further comprises at least one support disc seat 800 which is connected to the base 100 in a liftable manner. The support disc seat 800 is used for supporting the workpiece 600 during the linear cutting stage.

[0155] The support disc seat 800 is arranged between adjacent cutting assemblies 200. A set of support disc seats 800 is also arranged between the feeding assembly 900 and the adjacent cutting assembly 200, so as to realize the double-end support of the workpiece 600.

[0156] The support disc seat 800 comprises a support base frame 810, a feeding crystal holder 820 and a fixing crystal holder 830. The top of the support base frame 810 is provided with two oppositely arranged support surfaces 811 which form a V-shaped support part.

[0157] A set of feeding crystal holders 820 and fixing crystal holders 830 are respectively connected to the two support surfaces. The feeding crystal holder 820 is provided with a feeding roller which can rotate along the axial direction of the workpiece 600. The fixing crystal holder 830 only provides support for the workpiece 600.

[0158] The fixed crystal holder 830 can be individually implemented to rise and fall on the supporting surface of the supporting disc seat. When the linear cutting stage is performed, the supporting disc seat rises, and the fixed crystal holder 830 rises to a position higher than the feeding crystal holder 820 to support the workpiece 600. When the workpiece 600 is fed, the fixed crystal holder 830 falls below the feeding crystal holder 820, and the supporting disc seat drives the feeding crystal holder 820 to contact the workpiece 600, so as to facilitate the workpiece 600 to provide a rolling action to the workpiece 600 in the feeding process. Reference Figure 17 In the following, the entire cutting process of the wire cutting device is described in detail by taking the multi-station synchronous cutting process as an example:

[0159] At the beginning, the positions of the feeding support 500, the rotating support 400, each supporting disc seat 800, and each cutting assembly 200 on the base are adjusted.

[0160] The front end of the workpiece 600 sequentially passes through the feeding support 500 and the rotating support 400, and is connected to the blanking support 300 at the end.

[0161] The tension of the cutting wire 260 is adjusted. After the adjustment is completed, the controller controls the cutting drive of each cutting assembly 200 to be turned on.

[0162] The controller controls the rotating drive assembly 430 to be turned on, and the workpiece 600 starts to rotate. The rack 210 is driven by the lifting mechanism to move, and different positions of the workpiece 600 are cut by rotation.

[0163] The actual cutting depth P of the workpiece i The rotating cutting time t or the torque T of the cutting drive is calculated i When the cutting time t or the torque T of the cutting drive is reached i , the controller stops the rotating drive assembly 430, and the rack 210 stops descending, and the rotating cutting stage stops.

[0164] The supporting disc seat rises, and the fixed crystal holder 830 rises to a position higher than the feeding crystal holder 820 to contact the workpiece 600 and support the corresponding workpiece 600 below. The rack 210 continues to descend, and the linear cutting stage starts until the workpiece 600 is completely cut off.

[0165] After the cutting is completed, the controller controls the cutting drive to be turned off, and the cut short workpiece 600 is detached from the supporting disc seat 800, the blanking support 300, or the rotating support 400.

[0166] If the workpiece 600 is not cut, the controller controls the feeding drive to feed the workpiece 600 to the next cutting position by the feeding member, and performs the next cutting until the workpiece 600 is completely cut.

[0167] In the description of the above-mentioned embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0168] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application, therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A wire cutting method applied to a wire cutting device, characterized in that, the wire cutting device comprises: a base; a cutting assembly movable relative to a workpiece to achieve cutting, comprising a frame, and a cutting wheel set for winding a cutting wire, the cutting wheel set being rotatably connected to one side of the frame; a support assembly for supporting the workpiece, the support assembly comprising at least a feeding support, a rotating support and a discharging support arranged in sequence on the base, the rotating support being formed with a first rotating shaft sleeve, and the first rotating shaft sleeve being connected with a rotating drive assembly capable of driving the first rotating shaft sleeve to rotate, so that the first rotating shaft sleeve drives the workpiece to rotate; and a controller configured to control the rotating drive assembly and the cutting assembly; the wire cutting method comprises a rotating cutting stage and a straight line cutting stage; the rotating cutting stage: the controller controls the rotating drive assembly and the cutting assembly to be turned on, and the workpiece rotates around its own axis under the action of the rotating drive assembly, and the high-speed rotating cutting wire and the rotating workpiece produce relative motion; the straight line cutting stage: when the workpiece is cut to a predetermined position, the controller controls the rotating drive assembly to be turned off, and the workpiece stops rotating, and the high-speed rotating cutting wire and the workpiece continue to produce relative motion until the workpiece is cut off; the controller obtains the actual cutting depth P of the workpiece by directly monitoring the torque T of a cutting drive member for driving the cutting wire, and when the set cutting depth is reached, the rotating cutting stage is switched to the straight line cutting stage, and the actual cutting depth P of the workpiece and the torque T of the cutting drive member satisfy: ； where r is the radius of the workpiece, is a coefficient of the relationship between force and material removal rate, C2 is a coefficient of the relationship between material removal rate and contact arc length, is a coefficient between the torque T of the cutting drive and the feed direction load F f of the cutting drive.

2. A wire cutting device, characterized in that the wire cutting device uses the wire cutting method of claim 1 when cutting a workpiece, and at least one set of support disc seats is arranged between the feeding support and the rotating support. 3.The wire cutting device according to claim 2, characterized in that, the feeding support, the rotating support and the support disc seat are movably connected to the base for adjusting the cutting length. 4.The wire cutting device according to claim 3, characterized in that, two or more sets of the cutting assembly are movably connected to the base, and the cutting assemblies are arranged in a straight line direction on the base. 5.The wire cutting device according to claim 2, characterized in that, a second rotating shaft sleeve is rotatably connected to the feeding support, and a chuck is arranged in the first rotating shaft sleeve and the second rotating shaft sleeve, the chuck is formed with a hollow connecting portion, and the workpiece is located in the connecting portion. 6.The wire cutting device according to claim 2, characterized in that, the rotating drive assembly comprises a drive member and a transmission member, the drive member is fixed to the base, and the drive member is connected with the first rotating shaft sleeve through the transmission member. 7.The wire cutting device according to claim 2, characterized in that, The feeding assembly comprises a feeding driving part fixed on the base and a feeding piece connected with the feeding driving part, the feeding piece is detachably connected with the end of the workpiece, and the feeding piece is used for driving the workpiece to feed along the axial direction to a preset cutting position.

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