Transverse wire cutting device and method of controlling the same

Abstract

The application provides a transverse wire cutting device and a control method thereof, wherein the transverse wire cutting device comprises a base, a liquid storage tank, a wire winding mechanism and an electrode wire, the bottom end of the base is suspended with a current-carrying guide mechanism, the current-carrying guide mechanism comprises a conductive assembly and first and second guides which are transversely spaced, the liquid storage tank is located below the base and has a hollow structure with an open upper end, the first and second guides both extend into the liquid storage tank, the wire winding mechanism comprises first and second wire spools which are located on both sides of the base, the first end of the electrode wire is connected with the first wire spool, and the second end of the electrode wire passes through the current-carrying guide mechanism and is connected with the second wire spool. The electrode wire of the application cuts workpieces in a transverse direction, effectively avoids the wire jamming phenomenon, does not cause the mutual collision of workpieces, and can perform cutting operation for a long time with high efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wire cutting processing, in particular to a transverse wire cutting device and a control method thereof. BACKGROUND

[0002] With the rapid development of metal additive manufacturing (i.e. metal powder 3D printing technology), various complex and thin-walled 3D parts need to be taken off from the printing substrate after printing. The traditional process method is to use a band saw or a sand line machine to cut, but the band saw or sand line cutting will inevitably produce cutting force on the workpiece, which will cause irreparable damage and destruction to the thin-walled / micro parts. The electric spark cutting is a non-contact or micro-contact workpiece cutting method, which will not produce cutting force on the workpiece like the band saw or sand line machine. Therefore, for the processing of thin-walled / micro columnar parts, the electric spark discharge wire cutting is usually used for processing.

[0003] The traditional electric spark wire cutting machine adopts a vertical cutting method, i.e. the electrode wire is cut in the vertical direction. Since the 3D printed workpieces are not all continuous whole parts, many of them are array combinations of the same workpiece. Therefore, after some workpieces are cut, there is a problem of workpiece collection, i.e. after cutting, the workpieces arranged on the upper part will fall down due to the action of gravity, which will cause the workpieces to collide with each other and be damaged. For fixed workpiece cutting, the tooling requirement is high and the structure is complex. In addition, due to the action of gravity of the workpiece, the position of the workpiece changes during the cutting time period, which causes the change of the processing gap. If the gap becomes larger, there is no effect on the electrode wire. Once the gap becomes smaller, the wire carding phenomenon is easily caused, and the wire is seriously broken. In addition, the processing efficiency of the vertical wire cutting is low, and the existing cutting efficiency is 180 mm / min. 2 SUMMARY

[0004] The purpose of the present application is to provide a transverse wire cutting device and a control method thereof which can avoid wire carding and improve cutting efficiency.

[0005] To achieve the above purpose, the present application provides a transverse wire cutting device, which comprises:

[0006] a machine base, a power supply guide mechanism is suspended at the bottom end of the machine base, the power supply guide mechanism comprises a conductive assembly and first and second guides which are transversely spaced apart;

[0007] a liquid storage tank is located below the machine base, the liquid storage tank is a hollow structure with an open upper end, the first guide and the second guide both extend into the liquid storage tank;

[0008] a wire winding mechanism comprising first and second wire winding drums located on both sides of the machine base; ​

[0009] an electrode wire, a first end of which is connected with the first wire reel, a second end of which passes through the current conducting guide and is connected with the second wire reel.

[0010] The transverse wire cutting device as described above, wherein a speed measuring mechanism is further connected with the machine base, the speed measuring mechanism comprises:

[0011] a first row of wire wheels, which are located on a side of the machine base adjacent to the first wire reel, and a first speed measuring machine is connected with the first row of wire wheels;

[0012] a second row of wire wheels, which are located on a side of the machine base adjacent to the second wire reel, and a second speed measuring machine is connected with the second row of wire wheels;

[0013] a controller, which is electrically connected with the first speed measuring machine, the second speed measuring machine, the first wire reel and the second wire reel, and the controller adjusts the rotating speed of the first wire reel and the second wire reel according to the detection signals of the first speed measuring machine and the second speed measuring machine;

[0014] the electrode wire passes through the first row of wire wheels, the current conducting guide, the second row of wire wheels and is connected with the second wire reel in sequence.

[0015] The transverse wire cutting device as described above, wherein a tension mechanism is further connected with the machine base, the tension mechanism comprises a tension arm which is vertically arranged, a first end of the tension arm is rotatably connected with the machine base, and a tension wheel is connected with a second end of the tension arm, the electrode wire passes through the first row of wire wheels, the tension wheel and the second row of wire wheels in sequence and then passes through the current conducting guide.

[0016] The transverse wire cutting device as described above, wherein a tension motor is connected with the machine base, an output shaft of the tension motor is connected with the first end of the tension arm, and the output shaft of the tension motor can drive the tension arm to rotate.

[0017] The transverse wire cutting device as described above, wherein a detector for detecting the deflection angle of the tension arm is arranged on the tension motor, the detector is electrically connected with the controller, and the controller adjusts the rotating speed of the first wire reel and the second wire reel according to the detection signal of the detector.

[0018] The transverse wire cutting device as described above, wherein an auxiliary wheel is further connected with the machine base, the auxiliary wheel is located on a side of the second row of wire wheels which is away from the second wire reel, and the electrode wire which passes through the current conducting guide can pass through the upper part of the second row of wire wheels, the auxiliary wheel, the lower part of the second row of wire wheels and is connected with the second wire reel in sequence.

[0019] The transverse wire cutting device as claimed in claim 1, wherein a side wall of the base adjacent to the first wire roller is a first connecting wall, an axis of the first wire roller is parallel to the first connecting wall, a side wall of the base adjacent to the second wire roller is a second connecting wall, and an axis of the second wire roller is parallel to the second connecting wall.

[0020] The transverse wire cutting device as claimed in claim 1, further comprising an adjusting mechanism, wherein the adjusting mechanism comprises:

[0021] a first detecting assembly connected to the first connecting wall, the first detecting assembly comprising two first deflector rollers arranged side by side and spaced apart, the first deflector rollers being electrically connected to the controller, the electrode wire being capable of passing between the two first deflector rollers and capable of driving the first deflector rollers to rotate;

[0022] a first wire arranging motor connected to the first wire roller, the controller being electrically connected to the first wire arranging motor, and the controller being capable of starting the first wire arranging motor in a state that the first deflector rollers rotate, the first wire arranging motor being capable of driving the first wire roller to reciprocate along the axis of the first wire roller;

[0023] a second detecting assembly connected to the second connecting wall, the second detecting assembly comprising two second deflector rollers arranged side by side and spaced apart, the second deflector rollers being electrically connected to the controller, the electrode wire being capable of passing between the two second deflector rollers and capable of driving the second deflector rollers to rotate;

[0024] a second wire arranging motor connected to the second wire roller, the controller being electrically connected to the second wire arranging motor, and the controller being capable of starting the second wire arranging motor in a state that the second deflector rollers rotate, the second wire arranging motor being capable of driving the second wire roller to reciprocate along the axis of the second wire roller.

[0025] The transverse wire cutting device as claimed in claim 1, wherein two cantilevers are respectively connected to two sides of the bottom of the base, lower portions of the two cantilevers extending into the liquid storage tank, and the first guide and the second guide are respectively connected to the lower portions of the two cantilevers.

[0026] The transverse wire cutting device as claimed in claim 1, wherein the power supply guide mechanism further comprises a first main deflector roller and a second main deflector roller respectively connected to the two cantilevers, the first main deflector roller being located below the first wire arranging wheel, and the second main deflector roller being located below the second wire arranging wheel.

[0027] The transverse wire cutting device as claimed in claim 1, wherein the electrically conductive assembly comprises a first electrically conductive block and a second electrically conductive block, the first electrically conductive block and the second electrically conductive block being respectively connected to the two cantilevers.

[0028] The application also provides a control method of the transverse wire cutting device.

[0029] The control unit determines whether the first wire drum and the second wire drum are running normally according to the feedback signals of the first speed detector and the second speed detector, adjusts the rotating speed of the first wire drum and the rotating speed of the second wire drum until the rotating speed of the first wire drum and the rotating speed of the second wire drum match the preset wire running speed if it is determined that the first wire drum and the second wire drum are running normally, and controls the first wire drum and the second wire drum to stop working if it is determined that the first wire drum and the second wire drum are not running normally.

[0030] The control method as described above, wherein the not running normally includes wire breakage and no wire, and the determining whether the first wire drum and the second wire drum are running normally specifically includes:

[0031] The control unit compares the difference between the feedback signals of the first speed detector and the second speed detector with a preset deviation value, determines that the wire is broken if the difference is greater than the preset deviation value, determines that the wire is not wound if there is no feedback signal from the first speed detector and the second speed detector, and determines that the first wire drum and the second wire drum are running normally if the difference is less than or equal to the preset deviation value.

[0032] The control method as described above, wherein after the tension arm is deflected, the control unit adjusts the rotating speed of the first wire drum and the rotating speed of the second wire drum according to the feedback signal of the detector to make the tension arm return to the vertical position.

[0033] Compared with the prior art, the application has the following advantages:

[0034] The transverse wire cutting device has the advantages that the first wire drum and the second wire drum are arranged to effectively increase the working length of the electrode wire, increase the running speed of the electrode wire, and reduce the idle time of the reversing, so that the cutting operation can be performed for a long time with high efficiency.

[0035] The first guide and the second guide guide the electrode wire in the cutting area, so that the electrode wire can cut the workpiece transversely, the wire jamming phenomenon is effectively avoided, and the workpieces do not collide with each other.

[0036] The electrode wire in the cutting area is arranged below the liquid surface, the working environment of the electrode wire is improved, the heat generated by the electrode wire during processing is quickly taken away by the processing medium, the current-carrying capacity of the electrode wire is increased, the cutting speed is effectively improved, the speed of the medium entering the workpiece is increased, the chip removal is accelerated, the recovery time of the discharge channel is less, the normal discharge pulse formation is ensured to be increased, and the cutting efficiency is further improved.

[0037] The transverse wire cutting device of the present application can adjust the rotating speed of the first wire reel and the second wire reel in real time through the speed measuring mechanism, so that the rotating speed of the first wire reel and the second wire reel matches the preset wire running speed, thereby enabling the electrode wire to run at the preset speed.

[0038] The transverse wire cutting device of the present application can enable the electrode wire to cut at a constant tension through the tension mechanism.

[0039] The transverse wire cutting device of the present application can enable the electrode wire to cut at a constant tension through the tension mechanism.

[0040] The control method of the transverse wire cutting device of the present application is simple and convenient, and enables the electrode wire to run at a constant speed and constant tension. BRIEF DESCRIPTION OF DRAWINGS

[0041] The following drawings are only intended to illustrate and explain the present application, and do not limit the scope of the present application. Among them:

[0042] Figure 1 is a structural schematic diagram of the transverse wire cutting device of the present application;

[0043] Figures 2A to 2L is a structural schematic diagram of the adjustment process of the adjustment mechanism.

[0044] BRIEF DESCRIPTION OF DRAWINGS

[0045] 100, machine base; 101, first connecting wall; 102, second connecting wall; 103, cantilever;

[0046] 110, tension mechanism; 111, tension arm; 112, tension wheel; 113, tension motor;

[0047] 120, auxiliary wheel;

[0048] 210, conductive assembly; 211, first conductive block; 212, second conductive block;

[0049] 220, first guide;

[0050] 230, second guide;

[0051] 240, first main guide wheel;

[0052] 250, second main guide wheel;

[0053] 300, liquid storage tank;

[0054] 410, first wire reel; 411, first reel; 412, first wire winding motor;

[0055] 420, second wire spool; 421, first spool; 422, second wire winding motor;

[0056] 500, electrode wire;

[0057] 610, first wire arranging wheel;

[0058] 620, second wire arranging wheel;

[0059] 710, first deflector;

[0060] 720, first wire arranging motor;

[0061] 730, second deflector;

[0062] 740, second wire arranging motor;

[0063] 800, workpiece; 810, workpiece substrate. DETAILED DESCRIPTION

[0064] In order to have a clearer understanding of the technical solutions, objectives and effects of the present application, the specific embodiments of the present application will be described in conjunction with the accompanying drawings. Among them, the use of adjectival or adverbial modifiers "horizontal" and "vertical", "longitudinal" and "transverse", "forward transmission" and "reverse transmission" is only for the convenience of relative reference between multiple groups of terms, and does not describe any specific direction limitation of the modified term. In addition, the terms "first", "second", "third", "fourth" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" and the like can be explicitly or implicitly include one or more features.

[0065] As shown in Figure 1 The present application provides a transverse wire cutting device, which comprises a base 100, a liquid storage tank 300, a wire winding mechanism and an electrode wire 500, wherein:

[0066] The structure of the base 100 is basically the same as that of the prior art, and will not be described here again. The bottom end of the base 100 is suspended with a power transmission guide mechanism, which comprises a conductive assembly 210 and first and second guides 220 and 230 arranged transversely and spaced apart. The conductive assembly 210 can conduct electrical energy to the electrode wire 500 to form a discharge channel between the electrode wire 500 and the workpiece 800. The interval between the first and second guides 220 and 230 forms a cutting zone. The workpiece 800 to be cut is suspended on a moving device through a workpiece substrate 810 and is suspended between the first and second guides 220 and 230 through the moving device;

[0067] The liquid storage tank 300 is located below the machine base 100. The liquid storage tank 300 has a hollow structure with an open top. The liquid storage tank 300 contains liquid. The first guide 220 and the second guide 230 both extend into the liquid storage tank 300 from the top end. The first guide 220 and the second guide 230 are both contained in the liquid, so that the cutting operation can be carried out in the liquid, thereby allowing the heat generated by the electrode wire 500 during processing to be quickly carried away by the processing medium (the liquid in the liquid storage tank 300).

[0068] The winding mechanism includes a first wire spool 410 and a second wire spool 420 located on both sides of the base 100, such as... Figure 1 as well as Figures 2A to 2L As shown, the first yarn spool 410 includes a first winding motor 412 and a first spool 411 connected to the output shaft of the first winding motor 412. The first spool 411 can rotate synchronously with the output shaft of the first winding motor 412 to perform winding or unwinding operations. Specifically, the first spool 411 can be connected to the output shaft of the first winding motor 412 via a key or via a coupling. The second yarn spool 420 includes a second winding motor 422 and a second spool 421 connected to the output shaft of the second winding motor 422. The second spool 421 can rotate synchronously with the output shaft of the second winding motor 422 to perform winding or unwinding operations. The second spool 421 can be connected to the output shaft of the second winding motor 422 via a key or via a coupling. The specific structures of the first spool 411 and the second spool 421 are existing technologies and will not be described in detail here.

[0069] The first end of the electrode wire 500 is connected to the first wire spool 410, specifically, the first end of the electrode wire 500 is connected to the first spool 411. The second end of the electrode wire 500 passes through the energizing guide mechanism and is connected to the second spool 421. Specifically, the electrode wire 500 located in the cutting area is roughly horizontally positioned under the guidance of the first guide 220 and the second guide 230, thereby enabling transverse cutting of the workpiece 800. If the first wire spool 410 is in the unwinding state, the second wire spool 420 is in the winding state. At this time, the first spool... 411 is the driving wheel, and the second spool 421 is the driven wheel. If the first spool 410 is in the winding state, then the second spool 420 is in the unwinding state. At this time, the first spool 411 is the driven wheel, and the second spool 421 is the driving wheel. Preferably, the electrode wire 500 is made of molybdenum wire. Due to the presence of the first spool 410 and the second spool 420, the wire storage length of the electrode wire 500 can reach 5000 meters, and the operating speed of the electrode wire 500 can reach 20 meters per minute, ensuring high efficiency (300mm) for a long time (600 hours). 2The electrode wire 500 is usually wound on the first winding drum 411 in the initial state, and of course, the electrode wire 500 can also be wound on the second winding drum 21.

[0070] Specifically, when the cutting operation is performed, the conductive assembly 210 conducts electric energy to the electrode wire 500 to make the electrode wire 500 become one electrode of the discharge channel, the base plate of the workpiece 800 to be cut is connected with the moving device, the workpiece 800 to be cut with the other electrode of the conductive channel is moved to between the first guide 220 and the second guide 230 through the moving device, so that the voltage difference between the electrode wire 500 and the workpiece 800 to be cut can be generated, and thus the discharge channel between the electrode wire 500 and the workpiece 800 to be cut can be formed in the case of dielectric breakdown; the first wire winding motor 412 and the second wire winding motor 422 are started to be transmitted in the positive direction, so that the first winding drum 411 is in the wire releasing state, and the second winding drum 421 is in the wire winding state, until the wire releasing of the first winding drum 411 is completed, the first wire winding motor 412 and the second wire winding motor 422 are reversed, so that the first winding drum 411 is in the wire winding state, and the second winding drum 421 is in the wire releasing state, until the wire releasing of the second winding drum 421 is completed, and then the above process is repeated, and in the cutting process, the rotating speed of the first wire winding motor 412 and the second wire winding motor 422 is matched with the preset wire feeding speed.

[0071] The transverse wire cutting device provided by the application effectively increases the working length of the electrode wire 500, increases the running speed of the electrode wire 500, and reduces the idle time of the reversing, so that the cutting operation can be performed for a long time with high efficiency; the electrode wire 500 in the cutting area is guided by the first guide 220 and the second guide 230, so that the electrode wire 500 can cut the workpiece 800 transversely, the wire jamming phenomenon is effectively avoided, and the mutual collision of the workpieces 800 does not occur; the electrode wire 500 in the cutting area is arranged below the liquid level, the working environment of the electrode wire 500 is improved, the heat generated by the electrode wire 500 during the machining is rapidly taken away by the machining medium, so that the current-carrying capacity of the electrode wire 500 is increased (the current-carrying capacity of the conventional 0.2 mm diameter electrode wire 500 is less than 10 A, and the current-carrying capacity of the electrode wire 500 of the application can reach 20 A), the cutting speed is effectively improved, the speed of the medium entering the workpiece 800 is increased, the chip removal is accelerated, the recovery time of the discharge channel is less, the normal discharge pulse formation is ensured to be increased, and the cutting efficiency is further improved.

[0072] In one embodiment of the application, as shown in Figure 1 The speed measuring mechanism further includes a first wire arranging wheel 610, a second wire arranging wheel 620 and a controller (not shown in the figure), wherein:

[0073] The first row of wire wheels 610 is located on one side of the machine base 100 adjacent to the first wire reel 410, and a first speed detector (not shown in the figure) is connected to the first row of wire wheels 610. Specifically, the first speed detector is a first encoder, which is coaxially connected to the first row of wire wheels 610.

[0074] The second row of wire wheels 620 is located on one side of the machine base 100 adjacent to the second wire reel 420, and a second speed detector (not shown in the figure) is connected to the second row of wire wheels 620. Specifically, the second speed detector is a second encoder, which is coaxially connected to the second row of wire wheels 620.

[0075] The controller is electrically connected to the first speed detector, the second speed detector, the first wire reel 410 and the second wire reel 420. The controller adjusts the rotational speed of the first wire reel 410 and the second wire reel 420 according to the detection signals of the first speed detector and the second speed detector. Specifically, the controller can be a PLC controller.

[0076] The electrode wire 500 passes through the first row of wire wheels 610, the current-carrying guide mechanism and the second row of wire wheels 620 in sequence and is connected to the second wire reel 420. The first encoder can detect the rotational speed of the first row of wire wheels 610, thereby obtaining the rotational speed of the first wire reel 410. The second encoder can detect the rotational speed of the second row of wire wheels 620, thereby obtaining the rotational speed of the second wire reel 420. The controller adjusts the rotational speed of the first wire reel 410 and the second wire reel 420 in real time according to the detection signals sent by the first encoder and the second encoder, so that the rotational speed of the first wire reel 410 and the second wire reel 420 matches the preset wire feeding speed, thereby enabling the electrode wire 500 to run at a constant speed.

[0077] Of course, the first speed detector and the second speed detector can also use other sensors that can detect rotational speed. The first speed detector and the second speed detector can use the same structure or different structures as long as they can detect the real-time rotational speed of the first wire reel 410 and the second wire reel 420. Details are not described here.

[0078] Further, as shown in FIG. 6, the electrode wire 500 is connected to the electrode wire feeding mechanism 300 through the first wire reel 410 and the second wire reel 420. Figure 1As shown, the bottom of the base 100 is connected with two cantilever arms 103, specifically, the two cantilever arms 103 are symmetrically arranged on the bottom surface of the base 100, and the two cantilever arms 103 are adjacent to the first wire drum 410 and the second wire drum 420 respectively. The two cantilever arms 103 can be connected with the base 100 by bolts, or can be welded on the base 100, or can be integrally formed with the base 100. The lower part of the two cantilever arms 103 extends into the liquid storage tank 300. The first guide 220 and the second guide 230 are connected to the lower part of the two cantilever arms 103. The arrangement of the cantilever arms 103 makes the connection between the first guide 220 and the second guide 230 and the base 100 simple and convenient. Preferably, the first guide 220 and the second guide 230 are located on the same horizontal plane.

[0079] Further, the conductive assembly 210 includes a first conductive block 211 and a second conductive block 212, which are connected to the two cantilever arms 103 respectively. The first conductive block 211 and the second conductive block 212 conduct electric energy to the electrode wire 500, which can increase the reliability of the conductive assembly 210 conducting electric energy to the electrode wire 500.

[0080] Further, the power-on guide mechanism further includes a first main guide wheel 240 and a second main guide wheel 250 connected to the two cantilever arms 103. The first main guide wheel 240 is located below the first wire arranging wheel 610, and the second main guide wheel 250 is located below the second wire arranging wheel 620. The electrode wire 500 passes through the first conductive block 211, the first guide 220, the second guide 230, the second conductive block 212, the second main guide wheel 250, the second wire arranging wheel 620 and is connected to the second wire drum 420 in sequence. The arrangement of the first main guide wheel 240 and the second main guide wheel 250 can increase the horizontal length of the electrode wire 500, so that the cutting operation can be more smooth. Specifically, the first main guide wheel 240 and the second main guide wheel 250 are made of wear-resistant materials (such as gemstones), so that the size precision of the first main guide wheel 240 and the second main guide wheel 250 changes less within the service life, thereby ensuring that the position deviation of the electrode wire 500 in the machining is within the control range.

[0081] In one example of the present embodiment, as shown in FIG. 1, Figure 1As shown, the tension mechanism 110 is also connected to the base 100, the tension mechanism 110 comprises a vertically arranged tension arm 111, a first end of the tension arm 111 is rotatably connected to the base 100, a second end of the tension arm 111 is connected with a tension wheel 112, the electrode wire 500 can pass through the lower part of the first row of wire wheels 610, pass around the tension wheel 112, pass through the upper part of the second row of wire wheels 620, pass through the current conducting guide mechanism, pass around the second row of wire wheels 620 and be connected to the second wire reel 420 in sequence, specifically, the lower part of the first row of wire wheels 610 is provided with a first guide groove (not shown in the figure) for the electrode wire 500 to pass through, the upper part of the first row of wire wheels 610 is provided with a second guide groove (not shown in the figure) for the electrode wire 500 to pass through, during normal operation, the tension arm 111 is in a vertical position, when the tension of the electrode wire 500 changes, the tension arm 111 swings relative to the base 100 to adjust the tension of the electrode wire 500, so that the electrode wire 500 is always in a tensioned state, facilitating the smooth progress of the cutting operation.

[0082] Further, the base 100 is connected with a tension motor 113, the specific structure of the tension motor 113 is prior art, which will not be described here, an output shaft of the tension motor 113 is connected to the first end of the tension arm 111, the output shaft of the tension motor 113 can drive the tension arm 111 to rotate, the tension motor 113 drives the tension arm 111 to swing relative to the base 100, so that the operation of adjusting the tension of the electrode wire 500 becomes simple and convenient, and the constant tension controller of the tension motor 113 can ensure that the output tension is constant, that is, the tension mechanism 110 can generate a constant tension on the electrode wire 500, and the tension can be adjusted according to actual process parameters, in this embodiment, the adjustment range of the tension is 0-20N.

[0083] Further, the tension motor 113 is provided with a detector (not shown in the figure) for detecting the deflection angle of the tension arm 111, the detector is electrically connected with the controller, and the controller adjusts the rotating speed of the first wire spool 410 and the second wire spool 420 according to the detection signal of the detector. Specifically, the detector is a third encoder. When the tension of the electrode wire 500 does not change, the tension arm 111 is in a vertical arrangement state, at this time, the third encoder feeds back a normal signal, and the controller does not adjust the rotating speed of the first wire spool 410 and the second wire spool 420. When the tension of the electrode wire 500 decreases, the tension arm 111 deflects towards the second wire spool 420, at this time, the third encoder feeds back a tension decrease signal, at this time, if the first wire spool 410 releases the wire and the second wire spool 420 winds the wire, the controller adjusts the first wire winding motor 412 to slow down and the second wire winding motor 422 to speed up until the tension arm 111 returns to the vertical arrangement state, the third encoder feeds back a normal signal, and the controller adjusts the rotating speed of the first wire spool 410 and the second wire spool 420 to match the preset wire feeding speed. When the tension of the electrode wire 500 increases, the tension arm 111 deflects towards the first wire spool 410, at this time, the third encoder feeds back a tension increase signal, at this time, if the first wire spool 410 releases the wire and the second wire spool 420 winds the wire, the controller adjusts the first wire winding motor 412 to speed up and the second wire winding motor 422 to slow down until the tension arm 111 returns to the vertical arrangement state, the third encoder feeds back a normal signal, and the controller adjusts the rotating speed of the first wire spool 410 and the second wire spool 420 to match the preset wire feeding speed.

[0084] Further, the base 100 is also connected with an auxiliary wheel 120, the auxiliary wheel 120 is located on the side of the second wire arranging wheel 620 away from the second wire spool 420, preferably, the auxiliary wheel 120 is arranged in a substantially symmetrical manner with the tension wheel 112 when the tension arm 111 is in the vertical arrangement state. The electrode wire 500 passing through the current-carrying guide mechanism passes through the upper part of the second wire arranging wheel 620, winds around the auxiliary wheel 120, passes through the lower part of the second wire arranging wheel 620 and connects with the second wire spool 420. Specifically, the lower part of the second wire arranging wheel 620 is provided with a third guide groove (not shown in the figure) for the electrode wire 500 to pass through, and the upper part of the second wire arranging wheel 620 is provided with a fourth guide groove (not shown in the figure) for the electrode wire 500 to pass through. The arrangement of the auxiliary wheel 120 can make the electrode wires 500 on both sides of the base 100 basically balanced in force.

[0085] In one example of the present embodiment, as shown in Figure 1 the side wall of the base 100 adjacent to the first wire spool 410 is a first connecting wall 101, and the axis of the first wire spool 410 is parallel to the first connecting wall 101; the side wall of the base 100 adjacent to the second wire spool 420 is a second connecting wall 102, and the axis of the second wire spool 420 is parallel to the second connecting wall 102;

[0086] The transverse wire cutting device also includes an adjustment mechanism, which can adjust the positions of the first wire spool 410 and the second wire spool 420 in real time to correct and adjust the wire spacing of the electrode wires 500 on the first wire spool 410 and the second wire spool 420 in real time, ensuring that the wires are wound evenly according to the set wire spacing. The adjustment mechanism includes a first detection component, a first wire feeding motor 720, a second detection component, and a second wire feeding motor 740, wherein:

[0087] The first detection component is connected to the first connecting wall 101. The first detection component includes two first deflector wheels 710 arranged side by side and spaced apart. The first deflector wheels 710 are electrically connected to the controller. Specifically, the distance between the two first deflector wheels 710 is about 3mm, and a speed sensor (not shown in the figure) is provided on the first deflector wheel 710. The speed sensor can feed back a detection signal to the controller. The electrode wire 500 can pass between the two first deflector wheels 710, and the electrode wire 500 can drive the first deflector wheel 710 to rotate. Specifically, after the position of the electrode wire 500 is offset, it can contact the first deflector wheel 710 to generate friction. The first deflector wheel 710 rotates under the action of friction and stops rotating after losing friction.

[0088] The first wire-laying motor 720 is connected to the first wire drum 410, and the controller is electrically connected to the first wire-laying motor 720. The controller starts the first wire-laying motor 720 when the first guide wheel 710 is rotating. The first wire-laying motor 720 can drive the first wire drum 410 to reciprocate along its axial direction. Specifically, the first wire-laying motor 720 is connected to the first wire drum 410 through a worm gear structure or a bevel gear transmission structure, such as... Figures 2A to 2D As shown, if the electrode wire 500 contacts one of the first deflector wheels 710 and causes the first deflector wheel 710 to rotate, the speed sensor on the first deflector wheel 710 feeds back a rotation signal to the controller. The controller controls the first wire feeding motor 720 to drive the first wire winding drum 410 to move in the opposite direction to the first deflector wheel 710 until the electrode wire 500 is readjusted between the two first deflector wheels 710. After the first deflector wheel 710 loses friction and stops rotating, the speed sensor on the first deflector wheel 710 feeds back a stop signal to the controller. The controller controls the first wire feeding motor 720 to stop working.

[0089] The second detection component is connected to the second connecting wall 102. The second detection component includes two second deflector wheels 730 arranged side by side and spaced apart. The second deflector wheels 730 are electrically connected to the controller. Specifically, the interval between the two second deflector wheels 730 is about 3mm. Similarly, the second deflector wheels 730 are also equipped with speed sensors (not shown in the figure). The electrode wire 500 can pass between the two second deflector wheels 730 and can drive the second deflector wheels 730 to rotate. Specifically, after the position of the electrode wire 500 is offset, it can contact the second deflector wheel 730 to generate friction. The second deflector wheel 730 can rotate under the action of friction and stop rotating after losing friction.

[0090] The second wire winding motor 740 is connected to the second wire winding drum 420. The controller is electrically connected to the second wire winding motor 740, and the controller starts the second wire winding motor 740 when the second guide wheel 730 is rotating. The second wire winding motor 740 can drive the second wire winding drum 420 to reciprocate along its axial direction. Specifically, the second wire winding motor 740 is connected to the second wire winding drum 420 through a worm gear structure or a bevel gear transmission structure, such as... Figures 2E to 2H As shown, if the electrode wire 500 contacts one of the second deflector wheels 730 and causes the second deflector wheel 730 to rotate, the speed sensor on the second deflector wheel 730 feeds back a rotation signal to the controller. The controller controls the second wire feeding motor 740 to drive the second wire winding drum 420 to move in the opposite direction to the second deflector wheel 730 until the electrode wire 500 is readjusted between the two second deflector wheels 730. After the second deflector wheel 730 loses friction and stops rotating, the speed sensor on the second deflector wheel 730 feeds back a stop signal to the controller. The controller controls the second wire feeding motor 740 to stop working.

[0091] In addition, such as Figures 2I to 2L As shown, when the first wire spool 410 or the second wire spool 420 lays the wire to the position where it connects with the electrode wire 500, the first wire spool 410 or the second wire spool 420 continues to rotate. The side baffles of the first wire spool 410 or the second wire spool 420 pull the electrode wire 500 off-center. At this time, the electrode wire 500 will contact the first deflector wheel 710 or the second deflector wheel 730. Under the action of friction, the first deflector wheel 710 or the second deflector wheel 730 will rotate. The controller will control the first wire laying motor 720 or the second wire laying motor 740 to work according to the received feedback signal to adjust the position of the electrode wire 500. The specific adjustment process has been described in detail above and will not be repeated here. At the same time, the controller controls the first winding motor 412 and the second winding motor 422 to switch directions.

[0092] The working process of the transverse wire cutting device of the present invention will be described in detail below with reference to the accompanying drawings:

[0093] like Figure 1As shown, the first wire reel 410 is full of electrode wires 500, the second end of the electrode wires 500 passes through the two first deflector wheels 710, then passes through the first guide slot of the lower part of the first row of wire wheels 610, passes around the tension wheel 112, passes through the second guide slot of the upper part of the second row of wire wheels 620, passes through the first conducting block 211, passes through the first guide 220, passes through the second guide 230, passes through the second conducting block 212, passes through the third guide slot of the upper part of the second row of wire wheels 620, passes around the auxiliary wheel 120, passes through the fourth guide slot of the lower part of the second row of wire wheels 620, and then connects with the second wire reel 420 after passing through the two second deflector wheels 730;

[0094] When the cutting operation is performed, the conducting assembly 210 conducts electric energy to the electrode wires 500, so that the electrode wires 500 become one electrode of the discharge channel, the base plate of the workpiece to be cut 800 is connected with the moving device, and the workpiece to be cut 800 with the other electrode of the conducting channel is moved to the between the first guide 220 and the second guide 230 through the moving device, so that the electrode wires 500 and the workpiece to be cut 800 can also form a discharge channel;

[0095] The controller controls the first wire reel 410 and the second wire reel 420 to rotate in the forward direction, and makes the first wire reel 410 in the wire releasing state and the second wire reel 420 in the wire collecting state until the wire releasing of the first wire reel 410 is completed, and then controls the first wire reel 410 and the second wire reel 420 to rotate in the reverse direction, so that the first wire reel 410 is in the wire collecting state and the second wire reel 420 is in the wire releasing state until the wire releasing of the second wire reel 420 is completed, and then the above process is repeated, and during the whole cutting process, the controller controls the working state of the first row of wire motors 720 and the second row of wire motors 740 in real time according to the feedback signals of the first deflector wheels 710 and the second deflector wheels 730, so as to ensure that the wire is uniformly wound according to the set wire spacing, and the specific adjustment process has been described above and will not be described in detail here.

[0096] The application also provides a control method of the transverse wire cutting device, which comprises:

[0097] The control unit determines whether the first wire reel and the second wire reel are running normally according to the feedback signals of the first speed detector and the second speed detector, if it is determined that the first wire reel and the second wire reel are running normally, the speed of the first wire reel and the speed of the second wire reel are adjusted until the speed of the first wire reel and the speed of the second wire reel match the preset wire running speed, specifically, if the speed of the first wire reel and the speed of the second wire reel are less than the preset wire running speed, the first wire reel and the second wire reel are controlled to increase to match the preset wire running speed, if the speed of the first wire reel and the speed of the second wire reel are greater than the preset wire running speed, the first wire reel and the second wire reel are controlled to decrease to match the preset wire running speed, if the speed of the first wire reel and the speed of the second wire reel are equal to the preset wire running speed, the first wire reel and the second wire reel are controlled to continue running at the current speed, if it is determined that the first wire reel and the second wire reel are not running normally, the first wire reel and the second wire reel are controlled to stop working, so that the worker can timely perform maintenance operation.

[0098] The control unit can be a PLC controller, or a device (such as a computer) containing a PLC controller, when the determination result of the control unit is not normal, a prompt can be given on the designed display screen.

[0099] Further, the not normal running includes wire breakage and no wire, and the determination whether the first wire reel and the second wire reel are running normally specifically includes that the control unit compares the difference between the feedback signals of the first speed detector and the second speed detector with a preset deviation value, the difference is an absolute value, since the detection results of the first speed detector and the second speed detector will have a deviation, therefore, in order to eliminate the deviation, the deviation value range is determined according to the actual measurement deviation, for example, if the actual measurement deviation is 10, the deviation value range is 10-15, the deviation range is the preset deviation value, if the difference is greater than the preset deviation value, it is determined that the wire is broken, if the feedback value of the first speed detector and the feedback value of the second speed detector are both 0, it is determined that the wire is not wound, if the difference is less than or equal to the preset deviation value, it is determined that the wire is running normally.

[0100] Further, when the tension arm moves, the rotation speeds of the first wire reel and the second wire reel are adjusted according to the feedback signals of the sensors until the tension arm returns to the vertical position, specifically, when the tension of the electrode wire does not change, that is, the tension arm is in the vertical state, at this time, the detector feeds back a normal signal, and the control unit does not adjust the rotation speeds of the first wire reel and the second wire reel, when the tension of the electrode wire decreases, the tension arm deflects towards the second wire reel, at this time, the detector feeds back a signal that the tension decreases, at this time, if the first wire reel unwinds the wire and the second wire reel winds the wire, the control unit adjusts the first wire winding motor to reduce the speed and the second wire winding motor to increase the speed until the tension arm returns to the vertical position, the detector feeds back a normal signal, and the control unit adjusts the rotation speeds of the first wire reel and the second wire reel to match the running speed of the electrode wire, so that the first wire reel and the second wire reel run at the current rotation speed, when the tension of the electrode wire increases, the tension arm deflects towards the first wire reel, at this time, the detector feeds back a signal that the tension increases, at this time, if the first wire reel unwinds the wire and the second wire reel winds the wire, the control unit adjusts the first wire winding motor to increase the speed and the second wire winding motor to reduce the speed until the tension arm returns to the vertical position, the detector feeds back a normal signal, and the control unit adjusts the rotation speeds of the first wire reel and the second wire reel to match the running speed of the electrode wire.

[0101] The control method of the transverse wire cutting device has the advantages that the control unit adjusts the running speeds of the first wire reel and the second wire reel, so that the linear speed of the electrode wire remains consistent with the command value, thereby ensuring the constant linear speed of the electrode wire and enabling the electrode wire to cut at a constant tension, so that the transverse wire cutting device can continuously cut at high efficiency (300 mm / min) and for a long time (600 hours). 2

[0102] In summary, the transverse wire cutting device has the advantages that the first wire reel and the second wire reel are arranged, the working length of the electrode wire is effectively increased, the running speed of the electrode wire is increased, and the idle time of the reversing is reduced, thereby enabling the cutting operation to be performed for a long time and at high efficiency;

[0103] The transverse wire cutting device has the advantages that the first guide and the second guide guide the electrode wire in the cutting area, so that the electrode wire can cut the workpiece transversely, the wire jamming phenomenon is effectively avoided, and the workpieces do not collide with each other;

[0104] The transverse wire cutting device has the advantages that the electrode wire in the cutting area is arranged below the liquid surface, the working environment of the electrode wire is improved, the heat generated by the electrode wire during machining is quickly taken away by the machining medium, the current-carrying capacity of the electrode wire is increased, the cutting speed is effectively improved, the speed of the medium entering the workpiece is increased, the chip removal is accelerated, the recovery time of the discharge channel is less, the normal discharge pulse formation is increased, and the cutting efficiency is further improved; ​

[0105] The transverse wire cutting device of the present application can adjust the rotating speed of the first wire reel and the second wire reel in real time by setting the speed measuring mechanism, so that the rotating speed of the first wire reel and the second wire reel matches the preset wire running speed, thereby enabling the electrode wire to run at the preset speed;

[0106] The transverse wire cutting device of the present application can enable the electrode wire to cut at a constant tension by setting the tension mechanism;

[0107] The transverse wire cutting device of the present application can enable the electrode wire to run at a constant speed and constant tension by setting the control method.

[0108] The transverse wire cutting device of the present application can enable the electrode wire to run at a constant speed and constant tension by setting the control method.

[0109] The above is only a specific embodiment of the present application, and is not intended to limit the scope of the present application. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principle of the present application shall fall within the scope of the present application. It should be noted that the components of the present application are not limited to the above overall application, and the technical features described in the specification of the present application can be selected for single use or combined use, therefore, the present application naturally covers other combinations and specific applications related to the present application.

Claims

1. A transverse wire cutting device, characterized in that, The transverse wire cutting device comprises: a base, the bottom end of which is suspended with a power supply guide mechanism, the power supply guide mechanism comprising a conductive assembly and a first guide and a second guide arranged transversely; a tension motor connected to the base; a liquid storage tank located below the base, the liquid storage tank being a hollow structure with an open upper end, the first guide and the second guide both extending into the liquid storage tank; a wire winding mechanism comprising a first wire spool and a second wire spool located on both sides of the base; an electrode wire, the first end of which is connected to the first wire spool, the second end of which passes through the power supply guide mechanism and is connected to the second wire spool; a tension mechanism connected to the base, the tension mechanism comprising a vertically arranged tension arm, the first end of the tension arm being rotatably connected to the base through the output shaft of the tension motor, the second end of the tension arm being connected with a tension wheel, the electrode wire passing through the tension wheel and then the power supply guide mechanism, the tension motor being provided with a detector for detecting the deflection angle of the tension arm; a control unit, when the tension arm moves, the control unit adjusts the rotation speed of the first wire spool and the rotation speed of the second wire spool according to the feedback signal of the detector until the tension arm returns to vertical arrangement, the base is also connected with an auxiliary wheel and a second wire arranging wheel, the auxiliary wheel is located on the side of the second wire arranging wheel away from the second wire spool, the electrode wire passing through the power supply guide mechanism can pass through the upper part of the second wire arranging wheel, pass around the auxiliary wheel, pass through the lower part of the second wire arranging wheel and be connected to the second wire spool in sequence.

2. The transverse wire cutting device according to claim 1, wherein: the base is also connected with a speed measuring mechanism, the speed measuring mechanism comprising: a first wire arranging wheel located on the side of the base adjacent to the first wire spool, the first wire arranging wheel being connected with a first speed measuring machine; the second wire arranging wheel located on the side of the base adjacent to the second wire spool, the second wire arranging wheel being connected with a second speed measuring machine; a controller electrically connected with the first speed measuring machine, the second speed measuring machine, the first wire spool and the second wire spool, the controller adjusting the rotation speed of the first wire spool and the second wire spool according to the detection signal of the first speed measuring machine and the second speed measuring machine; the electrode wire passes around the first wire arranging wheel, passes through the power supply guide mechanism, passes around the second wire arranging wheel and is connected to the second wire spool in sequence.

3. The transverse wire cutting device according to claim 2, wherein: the electrode wire passes through the power supply guide mechanism after passing through the lower part of the first wire arranging wheel, passing around the tension wheel and passing through the upper part of the second wire arranging wheel.

4. The transverse wire cutting device according to claim 2, wherein: the side wall of the base adjacent to the first wire spool is a first connecting wall, the axis of the first wire spool is parallel to the first connecting wall, the side wall of the base adjacent to the second wire spool is a second connecting wall, the axis of the second wire spool is parallel to the second connecting wall. The transverse wire cutting device further comprises an adjusting mechanism, the adjusting mechanism comprises: A first detection assembly is connected to the first connecting wall, the first detection assembly comprises two first deflector rollers arranged side by side and spaced apart, the first deflector rollers are electrically connected to the controller, the electrode wire can pass between the two first deflector rollers, and the electrode wire can drive the first deflector rollers to rotate; A first wire arranging motor is connected to the first wire drum, the controller is electrically connected to the first wire arranging motor, and the controller can start the first wire arranging motor in the state that the first deflector rollers rotate, and the first wire arranging motor can drive the first wire drum to reciprocate along the axis direction of the first wire drum; A second detection assembly is connected to the second connecting wall, the second detection assembly comprises two second deflector rollers arranged side by side and spaced apart, the second deflector rollers are electrically connected to the controller, the electrode wire can pass between the two second deflector rollers, and the electrode wire can drive the second deflector rollers to rotate; A second wire arranging motor is connected to the second wire drum, the controller is electrically connected to the second wire arranging motor, and the controller can start the second wire arranging motor in the state that the second deflector rollers rotate, and the second wire arranging motor can drive the second wire drum to reciprocate along the axis direction of the second wire drum.

5. The transverse wire cutting device according to any one of claims 2 to 4, wherein The bottom of the machine base is connected with two cantilevers respectively, the lower parts of the two cantilevers extend into the liquid storage tank, and the first guide and the second guide are connected to the lower parts of the two cantilevers respectively.

6. The transverse wire cutting device according to claim 5, wherein The current-carrying guide mechanism further comprises a first main guide wheel and a second main guide wheel connected to the two cantilevers respectively, the first main guide wheel is located below the first wire arranging wheel, and the second main guide wheel is located below the second wire arranging wheel.

7. The transverse wire cutting device according to claim 5, wherein The current-carrying assembly comprises a first current-carrying block and a second current-carrying block, and the first current-carrying block and the second current-carrying block are connected to the two cantilevers respectively.

8. A control method for the transverse wire cutting apparatus as claimed in claim 1, characterized by, The control method comprises: The control unit determines whether the first wire drum and the second wire drum are normally running according to the feedback signals of the first speed detector and the second speed detector, if it is determined that the first wire drum and the second wire drum are normally running, the speed of the first wire drum and the speed of the second wire drum are adjusted until the speed of the first wire drum and the speed of the second wire drum match the preset wire running speed, if it is determined that the first wire drum and the second wire drum are not normally running, the first wire drum and the second wire drum are controlled to stop working.

9. The control method according to claim 8, characterized by, The abnormal running includes wire breakage and wire missing, and the determination of whether the first wire drum and the second wire drum are normally running specifically comprises: The control unit compares a difference value of feedback signals of the first tachometer and the second tachometer with a preset deviation value, if the difference value is greater than the preset deviation value, it is judged that the yarn is broken, if the first tachometer and the second tachometer have no feedback signal, it is judged that the yarn is not on the yarn feeding device, if the difference value is less than or equal to the preset deviation value, it is judged that the yarn feeding device is in normal operation.

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