Arc sheet cutting method of wire cutting machine, control device and wire cutting machine

Abstract

The present invention relates to the field of wire cutting technology, and in particular to an arc cutting method, a control device and a wire cutting machine for a wire cutting machine. The invention aims to solve the problem that when cutting arc slices, the existing wire cutting machine causes the symmetry of the upper and lower arcs of the cut arc slice to be poor due to inaccurate finding of the cutting zero point. To this end, the arc cutting method of the present application includes: obtaining the actual height of the workpiece to be cut and the arc radius of the cut arc slice; determining the symmetry compensation value according to the actual height and the arc radius; correcting the height of the workpiece to be cut according to the symmetry compensation value so that the horizontal height difference between the midpoint of the arc of the cut arc slice and the center of the circle is less than a preset threshold; and cutting after correcting the height of the workpiece to be cut. By compensating for the height of the workpiece to be cut and cutting according to the corrected height, the horizontal height difference between the midpoint of the arc of the cut arc slice and the center of the circle is less than the preset threshold, thereby improving the upper and lower symmetry of the arc slice.

Description

Technical Field

[0001] The present invention relates to the technical field of wire cutting, and in particular to an arc sheet cutting method of a wire cutting machine, a control device and a wire cutting machine. Background Art

[0002] Wire cutting is a cutting method that uses a cutting wire to reciprocate at high speed relative to the workpiece to be cut, cutting the workpiece (such as silicon rods, silicon carbide, semiconductors, sapphire, magnetic materials, etc.).

[0003] Wire cutting is usually performed in a wire cutting machine, which mainly includes a cutting assembly, a feed assembly, a winding assembly, a fluid circuit assembly and an electrical control box.

[0004] When the wire cutting machine cuts arc slices, it needs to determine the running trajectory of the worktable based on the actual height of the workpiece to be cut and the arc radius of the arc slice. Then two independent drive mechanisms drive the worktable to move along the determined running trajectory with the workpiece to be cut. If the midpoint of the arc of the cut arc slice is at the same horizontal height as the center point of the circle, it is a standard arc slice.

[0005] However, in the actual cutting process, due to mechanical errors and subjective errors such as manually finding the cutting zero point, there may be a situation where the midpoint of the arc of the cut arc piece and the center point of the circle are not at the same horizontal height and the horizontal height difference between the two is large, resulting in poor symmetry of the upper and lower arcs of the cut arc piece itself.

[0006] Accordingly, this field requires a new technical solution to solve the above problems. Summary of the Invention

[0007] In order to solve at least one of the above problems in the prior art, that is, to solve the problem that the existing wire cutting machine has poor symmetry of the upper and lower arcs of the cut arc slices due to inaccurate finding of the cutting zero point when cutting the arc slices.

[0008] On the one hand, the present application provides an arc cutting method for a wire cutting machine, the arc cutting method comprising: obtaining the actual height of the workpiece to be cut and the arc radius of the cutting arc, wherein the cutting arc is an arc formed by cutting the workpiece to be cut; determining a symmetry compensation value based on the actual height and the arc radius; correcting the height of the workpiece to be cut based on the symmetry compensation value so that the horizontal height difference between the midpoint of the arc of the cut cutting arc and the center of the circle is less than a preset threshold; after correcting the height of the workpiece to be cut, cutting the workpiece to be cut by the wire cutting machine.

[0009] This application provides a symmetry compensation value for the actual height of the workpiece to be cut to compensate and correct it, thereby obtaining the corrected height of the workpiece to be cut, and then determines the target operation trajectory of the workbench based on the corrected height and arc radius of the workpiece to be cut. The horizontal height difference between the midpoint of the arc of the cut arc piece and the center of the circle can be made less than a preset threshold, thereby improving the upper and lower symmetry of the arc piece.

[0010] In the preferred technical solution of the arc sheet cutting method of the above-mentioned wire cutting machine, the symmetry compensation value is determined based on the actual height and the arc radius, specifically including: determining the running trajectory of the worktable of the wire cutting machine and performing a trial cutting operation based on the actual height of the workpiece to be cut and the arc radius of the cutting arc sheet; determining the corresponding symmetry compensation value based on the cutting trajectory of the trial cut arc sheet cut out by the trial cutting operation.

[0011] Through such an arrangement, the provided symmetry compensation value is made more accurate, thereby further improving the symmetry of the upper and lower arcs of the cut arc piece.

[0012] In the preferred technical solution of the arc sheet cutting method of the above-mentioned wire cutting machine, the symmetry compensation value is determined based on the cutting trajectory of the trial arc sheet cut out by the trial cutting operation, specifically including: determining the vertical distance d between the center point of the cutting trajectory of the trial arc sheet and the vertical center line, wherein the vertical center line is the center line of the workpiece to be cut in the vertical direction; determining the relative position of the center point and the vertical center line; and determining the symmetry compensation value based on the vertical distance d and the relative position.

[0013] In the preferred technical solution of the arc sheet cutting method of the above-mentioned wire cutting machine, the symmetry compensation value is determined according to the vertical distance d and the relative position, specifically including: if the relative position indicates that the center point of the circle is located below the vertical center line, then the symmetry compensation value is determined according to the vertical distance d and the first compensation coefficient, wherein the first compensation coefficient is a negative value; if the relative position indicates that the center point of the circle is located above the vertical center line, then the symmetry compensation value is determined according to the vertical distance d and the second compensation coefficient, wherein the second compensation coefficient is a positive value.

[0014] In the preferred technical solution of the arc sheet cutting method of the above-mentioned wire cutting machine, the preset threshold value is not greater than 0.3 mm.

[0015] In the preferred technical solution of the arc sheet cutting method of the above-mentioned wire cutting machine, before the workpiece to be cut is cut by the wire cutting machine, the arc sheet cutting method also includes: controlling the wire cutting machine to automatically drive the workbench to move to the cutting starting position, wherein the cutting starting position is the starting position of the workbench pre-recorded during the trial cutting operation.

[0016] Through such an arrangement, the compensation effect can be improved, so that the symmetry of the upper and lower arcs of the cut arc piece can be optimized.

[0017] In the preferred technical solution of the arc sheet cutting method of the above-mentioned wire cutting machine, after the step of "obtaining the arc radius of the cutting arc sheet", the arc sheet cutting method further includes: determining the theoretical cutting trajectory and the actual cutting trajectory of the workpiece to be cut according to the actual height and the arc radius; determining the target trajectory to be compensated from the actual cutting trajectory according to the theoretical cutting trajectory and the actual cutting trajectory, wherein the target trajectory to be compensated is a trajectory in the actual cutting trajectory that does not overlap with the theoretical cutting trajectory; setting a preset compensation value for the target trajectory to be compensated for correction; after correcting the height of the workpiece to be cut, and in the target cutting stage to be compensated, controlling the wire cutting machine to cut the workpiece to be cut according to the corrected target trajectory to be compensated, wherein the target cutting stage to be compensated is a cutting stage corresponding to the target trajectory to be compensated.

[0018] The target trajectory to be compensated is determined based on the actual cutting trajectory and the theoretical cutting trajectory, and a preset compensation value is set for the target trajectory to be compensated for correction. The cutting machine is controlled to cut the workpiece according to the corrected cutting trajectory, so that the actual cutting trajectory is closer to the theoretical cutting trajectory. In this way, the upper and lower symmetry of the cut arc can be greatly improved.

[0019] In the preferred technical solution of the arc sheet cutting method of the wire cutting machine, setting a preset compensation value for the target trajectory to be compensated for correction specifically includes: setting a target lateral position compensation value to correct the lateral coordinate of the target trajectory to be compensated, wherein the preset compensation value includes the target lateral position compensation value;

[0020] Controlling the wire cutting machine to cut the workpiece to be cut according to the corrected target trajectory to be compensated specifically includes: controlling the wire cutting machine to cut the workpiece to be cut according to the corrected transverse coordinates of the target trajectory to be compensated.

[0021] In the preferred technical solution of the arc sheet cutting method of the above-mentioned wire cutting machine, the target trajectory to be compensated is determined from the actual cutting trajectory based on the theoretical cutting trajectory and the actual cutting trajectory, specifically including: dividing the target cutting stage to be compensated into N sub-cutting segments, where N is an integer not less than 2; obtaining the sub-compensation trajectory corresponding to each sub-cutting segment based on the theoretical cutting trajectory and the actual cutting trajectory, where the target trajectory to be compensated includes the sub-compensation trajectory corresponding to each sub-cutting segment.

[0022] In the preferred technical solution of the arc sheet cutting method of the above-mentioned wire cutting machine, a target lateral position compensation value is set to correct the lateral coordinates of the target trajectory to be compensated, specifically including: for each sub-cutting segment in the N sub-cutting segments, a lateral position compensation value is set, and the lateral coordinates of the end point of the sub-compensation trajectory corresponding to the sub-cutting segment are corrected; wherein, the target lateral position compensation value includes the lateral position compensation value of each sub-cutting segment.

[0023] By dividing the target cutting stage to be compensated into N sub-cutting segments and providing a corresponding lateral position compensation value for each sub-cutting segment, the arc shape of the actually cut cutting arc can be infinitely close to the theoretical arc shape.

[0024] In the preferred technical solution of the arc sheet cutting method of the wire cutting machine, the lateral position compensation value of the sub-cutting segment located at the last cutting position among the N sub-cutting segments is 0.

[0025] In the preferred technical solution of the arc sheet cutting method of the above-mentioned wire cutting machine, the wire cutting machine is controlled to cut the workpiece to be cut according to the horizontal coordinates of the corrected target trajectory to be compensated, including: obtaining the corrected compensation trajectory of each sub-cutting segment in the N sub-cutting segments; for each sub-cutting segment in the N sub-cutting segments, using the corrected compensation trajectory of the sub-cutting segment, controlling the wire cutting machine to cut the workpiece to be cut.

[0026] In the preferred technical solution of the arc sheet cutting method of the above-mentioned wire cutting machine, a preset compensation value is set for the target trajectory to be compensated for correction, specifically including: setting an arc radius compensation value to correct the cutting radius of the target trajectory to be compensated, wherein the preset compensation value includes the arc radius compensation value; according to the corrected target trajectory to be compensated, the wire cutting machine is controlled to cut the workpiece to be cut, specifically including: according to the corrected cutting radius of the target trajectory to be compensated, the wire cutting machine is controlled to cut the workpiece to be cut.

[0027] By providing an arc radius compensation value for the target cutting stage to be compensated, the cutting radius of the target trajectory to be compensated is compensated to reduce the cutting radius of the target cutting stage to be compensated. By reducing the cutting radius of the target cutting stage to be compensated, the cutting trajectory of the target cutting stage to be compensated (target trajectory to be compensated) can be made closer to the theoretical cutting trajectory, thereby greatly improving the upper and lower symmetry of the cut arc piece.

[0028] In the preferred technical solution of the arc sheet cutting method of the above-mentioned wire cutting machine, the target trajectory to be compensated is determined from the actual cutting trajectory based on the theoretical cutting trajectory and the actual cutting trajectory, specifically including: dividing the target cutting stage to be compensated into N sub-cutting segments, where N is an integer not less than 2; obtaining the sub-compensation trajectory corresponding to each sub-cutting segment based on the theoretical cutting trajectory and the actual cutting trajectory, where the target trajectory to be compensated includes the sub-compensation trajectory corresponding to each sub-cutting segment.

[0029] In the preferred technical solution of the arc sheet cutting method of the above-mentioned wire cutting machine, an arc radius compensation value is set to correct the cutting radius of the target trajectory to be compensated, specifically including: for each sub-cutting segment in the N sub-cutting segments, a radius compensation value is set to correct the cutting radius of the sub-compensation trajectory corresponding to the sub-cutting segment; wherein the arc radius compensation value includes the radius compensation value of each sub-compensation trajectory.

[0030] By dividing the target cutting stage to be compensated into N sub-cutting segments and providing a corresponding radius compensation value for each sub-cutting segment, the arc shape of the actually cut cutting arc can be infinitely close to the theoretical arc shape.

[0031] In the preferred technical solution of the arc sheet cutting method of the above-mentioned wire cutting machine, the wire cutting machine is controlled to cut the workpiece to be cut according to the corrected cutting radius of the target trajectory to be compensated, specifically including: for each sub-cutting segment in the N sub-cutting segments, the wire cutting machine is controlled to cut the workpiece to be cut according to the corrected cutting radius of the sub-cutting trajectory corresponding to the sub-cutting segment.

[0032] In the preferred technical solution of the arc sheet cutting method of the above-mentioned wire cutting machine, the radius compensation values of the N sub-cutting segments decrease in sequence from front to back according to the cutting time.

[0033] This arrangement can help make the arc shape of the actually cut arc piece closer to the theoretical arc shape.

[0034] In the preferred technical solution of the arc sheet cutting method of the above-mentioned wire cutting machine, the N sub-cutting segments include a first sub-cutting segment and a second sub-cutting segment, the first sub-cutting segment is located in front of the second sub-cutting segment, and the radius compensation value of the first sub-cutting segment is greater than the radius compensation value of the second sub-cutting segment.

[0035] In the preferred technical solution of the arc sheet cutting method of the above-mentioned wire cutting machine, the N sub-cutting segments also include a third sub-cutting segment, the third sub-cutting segment is located behind the second sub-cutting segment, and the radius compensation value of the third sub-cutting segment is smaller than the radius compensation value of the second sub-cutting segment.

[0036] The second aspect of the present application provides a control device, including a processor and a memory, wherein the memory is suitable for storing multiple program codes, and the program codes are suitable for being loaded and run by the processor to execute the arc sheet cutting method of the wire cutting machine provided in the first aspect.

[0037] A third aspect of the present application provides a wire cutting machine, which includes the control device provided by the second aspect.

[0038] In the preferred technical solution of the above-mentioned wire cutting machine, the wire cutting machine includes a frame and a cutting assembly and a feed assembly installed on the frame, the feed assembly includes a workbench, a first drive mechanism and a second drive mechanism, the first drive mechanism is used to drive the workbench to move vertically relative to the cutting assembly with the workpiece to be cut, and the second drive mechanism is used to drive the workbench to move horizontally relative to the cutting assembly with the workpiece to be cut.

[0039] In the preferred technical solution of the above-mentioned wire cutting machine, the wire cutting machine is a slicer. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The following describes the arc sheet cutting method of the wire cutting machine of the present application with reference to the accompanying drawings.

[0041] Figure 1 This is a flow chart of the arc sheet cutting method of the wire cutting machine of the present application;

[0042] Figure 2 Schematic diagram of actual cutting trajectory without symmetry compensation value in the prior art Figure 1 ;

[0043] Figure 3 Schematic diagram of actual cutting trajectory without symmetry compensation value in the prior art Figure 2 ;

[0044] Figure 4 This is a schematic diagram of an actual cutting trajectory in which no arc radius compensation value is provided in the prior art;

[0045] Figure 5 Schematic diagram of the actual cutting trajectory of the arc sheet cutting method of this application Figure 1 ;

[0046] Figure 6 Schematic diagram of the actual cutting trajectory of the arc sheet cutting method of this application Figure 2 ;

[0047] Figure 7 Schematic diagram of the actual cutting trajectory of the arc sheet cutting method of this application Figure 3 . DETAILED DESCRIPTION

[0048] The preferred embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the scope of protection of the present application.

[0049] It should be noted that, in the description of this application, terms such as "vertical" and "horizontal" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element described must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0050] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "installed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, or electrical connections; direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0051] Specifically, the wire cutting machine of the present application includes a frame and a cutting assembly and a feed assembly installed on the frame. The cutting assembly is used to cut the workpiece to be cut, and the feed assembly is used to fix the workpiece to be cut and move the workpiece to be cut.

[0052] The cutting assembly includes a main roller assembly, a cutting line arranged on the main roller assembly, and a driving device for driving the main roller assembly.

[0053] Exemplarily, the main roller assembly includes two main rollers arranged in parallel, the cutting line is wound around the main rollers, and a cutting line network is formed between the two main rollers. The driving device includes two motors, each of which is respectively connected to the corresponding main roller drive, and the motor can drive the respective main rollers to rotate at high speed.

[0054] The feed assembly includes a workbench, a first drive mechanism, and a second drive mechanism. The workbench is used to fix the workpiece to be cut. The first drive mechanism is used to drive the workbench to carry the workpiece to be cut relative to the cutting assembly in the vertical direction (i.e. Figure 2 The second drive mechanism is used to drive the workbench to move with the workpiece to be cut in the transverse direction (ie, the Z direction) relative to the cutting assembly. Figure 2 Horizontal movement (X direction shown in ).

[0055] When cutting arc sheets, the workbench can be controlled to move according to the designed running track by controlling the feed speed of the first drive mechanism and the feed speed of the second drive mechanism.

[0056] For example, during the cutting process, the feed speed of the first driving mechanism can be kept constant, that is, fed at a uniform speed, and the workbench is moved according to the designed running trajectory mainly by adjusting the feed speed of the second driving mechanism.

[0057] Refer to the following Figures 1 to 7 , the arc sheet cutting method of the wire cutting machine of this application is introduced.

[0058] like Figure 1 As shown, the arc sheet cutting method of the wire cutting machine of the present application includes steps S100 to S500.

[0059] S100: Obtaining the arc radius of the cutting arc piece.

[0060] Among them, the cutting arc piece is an arc piece formed by cutting the workpiece to be cut, and the arc radius of the cutting arc piece is determined according to the customer's requirements.

[0061] S200: Acquire the actual height of the workpiece to be cut.

[0062] Among them, the actual height of the workpiece to be cut is its dimension in the vertical direction, which can be obtained by the user by measuring with a ruler, or the actual height can be obtained from a pre-stored height database, or the actual height can be obtained through a height sensor. This application does not impose any specific restrictions.

[0063] S300: Determine a symmetry compensation value according to the actual height and arc radius.

[0064] S400: Correcting the height of the workpiece to be cut according to the symmetry compensation value so that the height difference between the midpoint of the arc of the cut arc piece and the center of the arc is less than a preset threshold.

[0065] Since the purpose of providing a compensation value for the actual height of the workpiece to be cut is to improve the symmetry of the upper and lower arcs of the arc piece, the compensation value is defined as a symmetry compensation value.

[0066] S500: After the height of the workpiece to be cut is corrected, the workpiece to be cut is cut by a wire cutting machine.

[0067] In the prior art, the center position of the workbench's running trajectory is determined based on the actual height of the workpiece to be cut. As can be seen from the background technology, due to inaccurate finding of the cutting zero point, the midpoint of the arc of the arc actually cut is not at the same horizontal height as the center point of the circle. The horizontal height difference between the two is large, resulting in poor symmetry of the upper and lower arcs of the cut arc.

[0068] This application provides a symmetry compensation value for the actual height of the workpiece to be cut to compensate and correct it, and obtain the corrected height of the workpiece to be cut. Then, the center position of the running trajectory of the worktable of the wire cutting machine is determined according to the corrected height of the workpiece to be cut, so that the symmetry of the upper and lower arcs of the arc piece cut according to the corrected center position is significantly improved.

[0069] For example, Figure 2 and Figure 3 As shown, arc AB (solid line) is the arc cut out according to the center position determined by the actual height of the workpiece to be cut. It can be seen from the figure that the center point O of arc AB and the midpoint D of arc AB are not at the same horizontal height. In this case, by setting the symmetry compensation value to compensate for the actual height of the workpiece to be cut, the arc actually cut out can be closer to the theoretical A1B1 arc (the center point O1 and the midpoint D1 of the A1B1 arc are exactly at the same horizontal height).

[0070] In specific applications, after determining the actual height of the workpiece to be cut, the arc radius of the cutting arc, and the symmetry compensation value, these three parameters can be input through the control panel of the wire cutting machine. The controller of the wire cutting machine can automatically generate a theoretical cutting trajectory, and then determine the target operation trajectory of the workbench based on the theoretical cutting trajectory. During the cutting process, the operation trajectory of the workbench is controlled by controlling the feed speed of the first drive mechanism along the Z direction and the feed speed of the second drive mechanism along the X direction.

[0071] It should be noted that in the above description, although the various steps of the arc sheet cutting method are described in this application in a specific order, these orders are not restrictive. Without deviating from the basic principles of the present invention, those skilled in the art can perform the steps in a different order.

[0072] For example, step S200 of the arc sheet cutting method of the present invention can be executed before step S100, or step S200 and step S100 can be executed simultaneously, and so on. The technical solution after adjustment is equivalent to the technical solution described in this application, and therefore will also fall within the scope of protection of the present invention.

[0073] In addition, it should be noted that, in actual applications, those skilled in the art can flexibly set the specific value of the preset threshold based on experiments or experience.

[0074] Preferably, the preset threshold is no greater than 0.3 mm.

[0075] Exemplarily, the preset threshold may be set to 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, etc.

[0076] Preferably, step S300, determining the symmetry compensation value according to the actual height and the arc radius, specifically includes:

[0077] S310: Determine the running trajectory of the workbench and perform a trial cutting operation based on the actual height of the workpiece to be cut and the arc radius of the cutting arc piece;

[0078] S320: Determine a symmetry compensation value according to a cutting trajectory of the trial-cut arc piece cut out of the trial-cutting operation.

[0079] That is to say, before the wire cutting machine of the present application officially performs the cutting operation, it first performs a trial cutting operation, and then determines the specific value of the symmetry compensation value based on the cutting trajectory of the trial cut arc piece cut out by the trial cutting operation, so that the provided symmetry compensation value is more accurate, which can further improve the symmetry of the upper and lower arcs of the cut arc piece.

[0080] For example, when performing a trial cutting operation, the running trajectory of the workbench is first determined based on the actual height of the workpiece to be cut and the arc radius of the cutting arc piece, and then a point is selected on the running trajectory as the cutting zero point position. The staff manually operates the first drive mechanism to drive the workbench to the cutting zero point position, and then the controller of the cutting machine automatically controls the first drive mechanism and the second drive mechanism to drive the workbench to move along the running trajectory to cut the workpiece to be cut.

[0081] Preferably, before step S500 of “cutting the workpiece by a wire cutting machine”, the arc sheet cutting method of the present application further includes:

[0082] Control the wire cutting machine to automatically drive the workbench to move to the cutting starting point;

[0083] The cutting starting point is the starting point of the workbench recorded in advance during the trial cutting operation.

[0084] After determining the specific value of the corresponding symmetry compensation value based on the cutting trajectory of the trial-cut arc piece cut out of the trial cutting operation, during the formal cutting operation, the wire cutting machine automatically drives the worktable to move to the cutting starting position during the trial cutting operation, and then cuts the workpiece to be cut. This can improve the compensation effect and make the symmetry of the upper and lower arcs of the cut arc piece reach the best.

[0085] For example, during a trial cutting operation, the staff manually operates the motor of the first drive mechanism to drive the workbench to move toward the set cutting zero position. When the staff believes that the workbench has moved to the cutting zero position, they can click the OK button. At this time, the encoder of the motor of the first drive mechanism will automatically record the current position, which is the cutting starting position of the workbench. When performing a formal cutting operation, the motor of the first drive mechanism can automatically drive the workbench to the cutting starting position according to the previous record, and then start cutting the workpiece to be cut according to the determined target operation trajectory by controlling the workbench.

[0086] Preferably, step S320, determining a corresponding symmetry compensation value according to the cutting trajectory of the trial-cut arc piece cut by the trial-cutting operation, specifically includes:

[0087] S321: Determine the vertical distance d between the center point of the cutting trajectory of the arc piece and the vertical center line; wherein the vertical center line is the center line of the workpiece to be cut in the vertical direction;

[0088] S322: Determine the relative position of the circle center point and the vertical midline;

[0089] S323: Determine a symmetry compensation value according to the vertical distance d and the relative position.

[0090] Preferably, step S323, determining the symmetry compensation value according to the vertical distance d and the relative position, specifically includes:

[0091] If the center point of the relative position representation circle is below the vertical center line, a symmetry compensation value is determined according to the vertical distance d and a first compensation coefficient, wherein the first compensation coefficient is a negative value;

[0092] If the center point of the relative position representation circle is located above the vertical center line, the symmetry compensation value is determined according to the vertical distance d and the second compensation coefficient, wherein the second compensation coefficient is a positive value.

[0093] like Figure 2 As shown, the center point O of the AB arc (the cutting trajectory of the arc cut out by the trial cutting operation) is located below the vertical center line of the workpiece to be cut (shown by the horizontal dotted line). If you want to cut an arc AC that is symmetrical up and down according to the center point (point C is the intersection of the arc where the AB arc is located and the horizontal dotted line, and point C and point A are on the same vertical line), you need a workpiece to be cut with a larger actual height. However, the actual height of the workpiece to be cut is fixed.

[0094] In this case, the present application sets the symmetry compensation value to a negative value, which is equivalent to reducing the height of the piece to be cut. In this way, the position of the center point O can be corrected. Figure 2Looking from above, it is equivalent to moving the AB arc upward. The ideal situation is to move the center point O to the position of the horizontal dotted line (that is, the position of the circular point O1). In this way, the AB arc moves exactly to the A1B1 arc.

[0095] For example, Figure 2 As shown, the actual height of the workpiece to be cut is H = 30 mm, the vertical distance between the center point O and the vertical midline is d = 0.5 mm, and the first compensation coefficient k1 = -2. Then, the symmetry compensation value θ = k1 × d = -2 × 0.5 = -1 mm, and the corrected height H0 of the workpiece to be cut is H = the actual height H + the symmetry compensation value θ = 30-1 = 29 mm.

[0096] It should be noted that the specific value of the first compensation coefficient is not limited to the above-mentioned -2. Those skilled in the art can flexibly set the specific value of the first compensation coefficient based on experiments or experience in actual applications.

[0097] Preferably, the first compensation coefficient k1 is any value between -2 and -1.5.

[0098] like Figure 3 As shown, this situation is similar to Figure 2 The situation is just the opposite. The center point O of the arc AB is above the vertical center line of the workpiece to be cut. If you want to cut an arc AC that is symmetrical up and down according to the center point (points A and C are on the same vertical line), you need a workpiece with a smaller actual height to be cut. In this case, the application sets the symmetry compensation value to a positive value, which is equivalent to increasing the height of the workpiece to be cut. In this way, the position of the center point O can be corrected, so that Figure 3 Looking from above, it is equivalent to moving the AB arc downward. The ideal situation is to move the center point O down to the position of the horizontal dotted line (that is, the position of the center point O1). In this way, the AB arc moves exactly to the A1B1 arc.

[0099] For example, Figure 3 As shown, the actual height of the workpiece to be cut is H = 30 mm, the vertical distance between the center point O and the vertical midline is d = 0.4 mm, and the second compensation coefficient k2 = 2. Then, the symmetry compensation value θ = K2 × d = 2 × 0.4 = 0.8 mm, and the corrected height of the workpiece to be cut is H0 = actual height H + symmetry compensation value θ = 30 + 0.8 = 30.8 mm.

[0100] It should be noted that the specific value of the second compensation coefficient is not limited to the above 2. Those skilled in the art can flexibly set the specific value of the second compensation coefficient based on experiments or experience in actual applications.

[0101] Preferably, the second compensation coefficient k2 is any value between 1.5 and 2.

[0102] Preferably, after step S200, the arc sheet cutting method of the present application further includes steps S600 to S900.

[0103] S600: Determine a theoretical cutting trajectory and an actual cutting trajectory of the workpiece to be cut according to the actual height of the workpiece to be cut and the arc radius of the cutting arc.

[0104] After determining the actual height of the workpiece to be cut and the arc radius of the cutting arc, these two parameters are input into the control device of the wire cutting machine through the control panel of the wire cutting machine. Alternatively, the actual height of the workpiece to be cut and the arc radius of the cutting arc can be directly obtained through the sensor and transmitted to the control device of the wire cutting machine. In this way, the control device of the wire cutting machine can automatically generate a theoretical cutting trajectory according to the actual height of the workpiece to be cut and the arc radius of the cutting arc, such as Figure 4 As shown in FIG, the AECB arc is the theoretical cutting trajectory (wherein point A is the cutting starting point, point B is the cutting end point, and A and B are on the same vertical line). The running trajectory of the workbench is then determined based on the theoretical cutting trajectory. During the cutting process, the running trajectory of the workbench can be controlled by controlling the feed speed of the first drive mechanism along the Z direction and the feed speed of the second drive mechanism along the X direction.

[0105] After the working path of the workbench is determined according to the theoretical cutting path, a trial cutting operation can be performed on the workpiece to be cut to obtain the actual cutting path of the workpiece to be cut, such as Figure 4 As shown in the figure, the AFCB arc is the actual cutting trajectory.

[0106] Of course, the actual height of the workpiece to be cut and the arc radius of the cutting arc can also be input into the actual cutting trajectory model to obtain the actual cutting trajectory of the workpiece to be cut, wherein the actual cutting trajectory model can be trained using the actual height of the historically cut workpiece and the arc radius of the historically cut workpiece.

[0107] As can be seen from the background technology, in the early stage of the cutting process, the wire bow of the cutting line is unstable. As the cutting progresses, the wire bow of the cutting line will gradually increase. If the control table runs according to the running trajectory determined by the theoretical cutting trajectory, it will be affected by the wire bow of the cutting line. Figure 4 As shown in FIG, the arc piece actually cut corresponds to the AFCB arc, resulting in the upper and lower asymmetry of the entire arc piece.

[0108] S700: According to the theoretical cutting trajectory and the actual cutting trajectory, a target trajectory to be compensated is determined from the actual cutting trajectory.

[0109] Among them, the target trajectory to be compensated is the trajectory in the actual cutting trajectory that does not overlap with the theoretical cutting trajectory, such as Figure 4As shown in FIG, the AFC segment in the actual cutting trajectory deviates from the AEC segment in the theoretical cutting trajectory and does not overlap with the theoretical cutting trajectory. Therefore, the target trajectory to be compensated is the AFC segment in the actual cutting trajectory.

[0110] It is understandable that if Figure 4 As shown, in the AC segment, the line bow of the cutting line gradually increases, and in the CB segment, the line bow of the cutting line is in a stable state. The cutting stage corresponding to the AC segment can be defined as the target cutting stage to be compensated, and the target cutting stage to be compensated corresponds to the target trajectory to be compensated. The cutting stage corresponding to the CB segment is defined as the cutting stage without compensation, and the cutting stage without compensation is the cutting stage other than the target cutting stage to be compensated.

[0111] Specifically, by Figure 4 For example, if the height of the workpiece to be cut is 30 mm, that is, the vertical distance H between AB is 30 mm, and the vertical distance H1 between AC is determined to be 10 mm through trial cutting, the cutting stage with a feed amount between 0 and 10 mm in the vertical direction (AC segment) can be defined as the target cutting stage to be compensated, and the cutting stage with a feed amount between 10 and 30 mm in the vertical direction (CB segment) can be defined as the cutting stage without compensation.

[0112] S800: Setting a preset compensation value for the target trajectory to be compensated for correction.

[0113] S900: In the target compensation cutting stage, the wire cutting machine is controlled to cut the workpiece according to the corrected target compensation trajectory.

[0114] After correcting the height of the workpiece to be cut, the center position of the running trajectory of the worktable of the wire cutting machine is determined according to the corrected height of the workpiece to be cut, so that the symmetry of the upper and lower arcs of the arc piece cut according to the corrected center position is significantly improved; on the basis of significantly improving the symmetry of the upper and lower arcs of the cut arc piece, a preset compensation value is set for the target trajectory to be compensated in the target cutting stage to further correct and compensate the running trajectory of the worktable, so that the actual cutting trajectory is closer to the theoretical cutting trajectory, that is, the arc shape of the cut arc piece is closer to the theoretical arc shape, thereby further improving the symmetry of the upper and lower arcs of the arc piece cut from the workpiece to be cut.

[0115] It should be noted that in actual applications, the compensation value can be set for the horizontal coordinate of the target trajectory to be compensated for correction, or the compensation value can be set for the cutting radius of the target trajectory to be compensated for correction, or the compensation value can be set for both the horizontal coordinate and the cutting radius of the target trajectory to be compensated for correction, and so on. Such flexible adjustments and changes do not deviate from the principles and scope of this application and should be limited within the scope of protection of this application.

[0116] In the first preferred case,

[0117] Step S800, "setting a preset compensation value for the target trajectory to be compensated and correcting it," specifically includes: setting a target lateral position compensation value to correct the lateral coordinates of the target trajectory to be compensated. The preset compensation value includes the target lateral position compensation value.

[0118] Step S900 , controlling the wire cutting machine to cut the workpiece according to the corrected target trajectory to be compensated, specifically includes: controlling the wire cutting machine to cut the workpiece according to the horizontal coordinates of the corrected target trajectory to be compensated.

[0119] After correcting the height of the workpiece to be cut, the center position of the running trajectory of the worktable of the wire cutting machine is determined according to the corrected height of the workpiece to be cut, so that the symmetry of the upper and lower arcs of the arc piece cut according to the corrected center position is significantly improved; on the basis of significantly improving the symmetry of the upper and lower arcs of the cut arc piece, the target lateral position compensation value is set to correct the lateral coordinates of the target trajectory to be compensated, so that the lateral coordinates of the corrected target trajectory to be compensated are closer to the lateral coordinates of the theoretical cutting trajectory, thereby making the actual cutting trajectory closer to the theoretical cutting trajectory, that is, making the arc shape of the cut arc piece closer to the theoretical arc shape, thereby further improving the symmetry of the upper and lower arcs of the arc piece cut out of the workpiece to be cut.

[0120] That is, in this embodiment, correction is performed by setting a target lateral position compensation value for the target trajectory to be compensated in the target cutting stage to be compensated.

[0121] It should be noted that, in practical applications, those skilled in the art can set the specific numerical value of the target lateral position compensation value through experiments or experience.

[0122] Furthermore, it should be noted that, in actual applications, those skilled in the art may provide only one target lateral position compensation value for the target cutting stage to be compensated, or may divide the target cutting stage to be compensated into multiple sub-cutting segments and provide a corresponding lateral position compensation value for each sub-cutting segment. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should be limited to the scope of protection of the present invention. Furthermore, when only one target lateral position compensation value is provided for the target cutting stage to be compensated, any one trajectory point other than the end point may be selected from all trajectory points of the target trajectory to be compensated, and the selected trajectory point may be corrected using the target lateral position compensation value.

[0123] Preferably, step S700, based on the theoretical cutting trajectory and the actual cutting trajectory, determines the target trajectory to be compensated from the actual cutting trajectory, specifically including:

[0124] S710: Divide the target cutting stage to be compensated into N sub-cutting segments.

[0125] Wherein, N is an integer not less than 2. For example, N can be set to 2, 3, or 4.

[0126] S720: Obtain a sub-compensation trajectory corresponding to each sub-cutting segment according to the theoretical cutting trajectory and the actual cutting trajectory.

[0127] The target trajectory to be compensated includes a sub-compensation trajectory corresponding to each sub-cutting segment.

[0128] Preferably, setting the target lateral position compensation value to correct the lateral coordinate of the target trajectory to be compensated specifically includes:

[0129] Setting a lateral position compensation value for each of the N sub-cutting segments, and correcting the lateral coordinate of the end point of the sub-compensation trajectory corresponding to the sub-cutting segment;

[0130] The target lateral position compensation value includes the lateral position compensation value of each sub-cutting segment.

[0131] It should be noted that the lateral position compensation value of the sub-cutting segment located at the last cutting position among the N sub-cutting segments is 0, and can also be set to a value less than 0.1 mm. This application does not impose any specific restrictions.

[0132] Preferably, the lateral position compensation value of the sub-cutting segment located at the last cutting position among the N sub-cutting segments is set to 0.

[0133] Since the end point of the sub-cutting segment in the last cutting order among the N sub-cutting segments is usually on the theoretical cutting trajectory, setting the lateral position compensation value of the sub-cutting segment in the last cutting order to 0 can ensure that the actual cutting trajectory of the workpiece to be cut is closer to the theoretical cutting trajectory, thereby greatly improving the upper and lower symmetry of the cut arc piece and reducing the probability of the cut arc piece being asymmetric.

[0134] Preferably, according to the corrected transverse coordinates of the target trajectory to be compensated, controlling the wire cutting machine to cut the workpiece includes:

[0135] Obtaining a corrected compensation trajectory of each of the N sub-cutting segments;

[0136] For each of the N sub-cutting segments, the wire cutting machine is controlled to cut the workpiece by utilizing the corrected compensation trajectory of the sub-cutting segment.

[0137] The lateral coordinate of the end point of the sub-compensation trajectory is corrected by the lateral position compensation value, wherein the lateral position compensation value is a positive value, which can make the actual cutting end point of the sub-cutting segment close to the theoretical cutting end point of the sub-cutting segment, thereby making the actual cutting trajectory more consistent with the theoretical cutting trajectory.

[0138] Example 1, such as Figure 5 As shown, N=2, that is, the target cutting stage to be compensated (AC) is divided into two sub-cutting segments AF (first sub-cutting segment) and FC (second sub-cutting segment).

[0139] Among them, the FC segment is the sub-cutting segment located at the last cutting position, and its lateral position compensation value is 0. By setting the lateral position compensation value for the AF segment, the lateral coordinate of the end point F of the sub-compensation track of the AF segment is corrected. Point D is the end point of the corrected sub-compensation track. AD and DC are the corrected compensation tracks of the two sub-cutting segments respectively. The two corrected compensation tracks are used to control the wire cutting machine to cut the workpiece. Compared with the AFC arc, the ADC arc in this embodiment is closer to Figure 2 AEC arc in.

[0140] For example, during the cutting process, the first drive mechanism maintains a uniform feed speed, and the worktable moves along the running trajectory by adjusting the feed speed of the second drive mechanism along the X direction. After providing a lateral position compensation value for the AF segment, it is necessary to increase the feed speed of the second drive mechanism in the AF segment to adjust the cutting end point of the AF segment from point F to point D. In addition, in order to ensure that the cutting end point of the FC segment remains unchanged, it is necessary to reduce the feed speed of the second drive mechanism in the FC segment.

[0141] It should be noted that, in practical applications, those skilled in the art can set the specific numerical value of the lateral position compensation value through experiments or experience.

[0142] In addition, it should be noted that, in actual applications, those skilled in the art can flexibly set the vertical feed amount of the first sub-cutting segment. For example, the vertical feed amount of the first sub-cutting segment can be set to 2 / 3 of the vertical feed amount of the target cutting stage to be compensated, or the vertical feed amount of the first sub-cutting segment can be set to 1 / 2 of the vertical feed amount of the target cutting stage to be compensated, or the vertical feed amount of the first sub-cutting segment can be set to 1 / 3 of the vertical feed amount of the target cutting stage to be compensated, and so on. Such flexible adjustment and change does not deviate from the principle and scope of the present invention, and should be limited within the protection scope of the present invention.

[0143] In this embodiment, the vertical feed rate of the first sub-cutting segment is preferably set to between 1 / 3 and 2 / 3 of the target vertical feed rate of the cutting stage to be compensated. Further preferably, in this embodiment, the vertical feed rate of the first sub-cutting segment is set to 1 / 2 of the target vertical feed rate of the cutting stage to be compensated.

[0144] For example, Figure 5 As shown, the feed amount in the vertical direction of the target cutting stage to be compensated (AC segment) is 8 mm, so the feed amount in the vertical direction of the first sub-cutting segment (AF segment) is set to 4 mm.

[0145] Example 2, such as Figure 6 As shown, N=3, that is, the target cutting stage to be compensated (AC) is divided into three sub-cutting segments AF1 (first sub-cutting segment), F1F2 (second sub-cutting segment), and F2C (third sub-cutting segment).

[0146] Among them, segment F2C is the sub-cutting segment located in the last cutting sequence, and its lateral position compensation value is 0. By setting the lateral position compensation values for segments AF1 and F1F2, the lateral coordinates of the end points F1 and F2 of the sub-compensation trajectories of segments AF1 and F1F2 are corrected respectively. Points D1 and D2 are the corrected end points of the two sub-compensation trajectories, respectively. AD1, D1D2 and D2C are the corrected compensation trajectories of the three sub-cutting segments, respectively. The three corrected compensation trajectories are used to control the wire cutting machine to cut the workpiece. Compared with the AF1F2C arc, the AD1D2C arc in this embodiment is closer to the AF1F2C arc. Figure 2 AEC arc in.

[0147] It should be noted that, in practical applications, those skilled in the art can flexibly set the feed rates of the first sub-cutting segment and the second sub-cutting segment in the vertical direction based on experiments and experience.

[0148] In this embodiment, the vertical feed rate of the first sub-cutting segment and the vertical feed rate of the second sub-cutting segment are preferably set to 1 / 3 of the vertical feed rate of the target cutting stage to be compensated.

[0149] For example, Figure 6 As shown, the feed amount of the target cutting stage to be compensated (AC segment) along the vertical direction (i.e., the Z-axis direction in the figure) is 9 mm, then the feed amount of the first sub-cutting segment (AF1 segment) along the vertical direction is 3 mm, and the feed amount of the second sub-cutting segment (F1F2 segment) along the vertical direction is also 3 mm, that is, the cutting stage with a feed amount between 0 and 3 mm in the vertical direction is defined as the first sub-cutting segment, the cutting stage with a feed amount between 3 and 6 mm in the vertical direction is defined as the second sub-cutting segment, and the cutting stage with a feed amount between 6 and 9 mm in the vertical direction is defined as the third sub-cutting segment.

[0150] Example 3, such as Figure 7 As shown, N=4, that is, the target cutting stage to be compensated (AC) is divided into four sub-cutting segments AF1 (first sub-cutting segment), F1F2 (second sub-cutting segment), F2F3 (third sub-cutting segment), and F3C (fourth sub-cutting segment).

[0151] Among them, segment F3C is the sub-cutting segment located in the last cutting sequence, and its lateral position compensation value is 0. By setting the lateral position compensation values for segments AF1, F1F2 and F2F3, the lateral coordinates of the end points F1, F2 and F3 of the sub-compensation trajectories of segments AF1, F1F2 and F2F3 are corrected respectively. Points D1, D2 and D3 are the corrected end points of the two sub-compensation trajectories respectively. AD1, D1D2, D2D3 and D3C are the corrected compensation trajectories of the four sub-cutting segments respectively. These four corrected compensation trajectories are used to control the wire cutting machine to cut the workpiece. Compared with the AF1F2F3C arc, the AD1D2D3C arc in this embodiment is closer to the AF1F2F3C arc. Figure 2 AEC arc in.

[0152] It should be noted that, in practical applications, those skilled in the art can flexibly set the feed rates of the first sub-cutting segment, the second sub-cutting segment and the third sub-cutting segment in the vertical direction based on experiments and experience.

[0153] In this embodiment, the vertical feed rate of the first sub-cutting segment, the vertical feed rate of the second sub-cutting segment, and the vertical feed rate of the third sub-cutting segment are preferably set to 1 / 4 of the vertical feed rate of the target cutting stage to be compensated.

[0154] For example, Figure 7As shown, the feed amount of the target cutting stage to be compensated (AC segment) along the vertical direction (i.e., the Z-axis direction in the figure) is 8 mm, then the feed amount of the first sub-cutting segment (AF1 segment) along the vertical direction, the feed amount of the second sub-cutting segment (F1F2 segment) along the vertical direction, and the feed amount of the third sub-cutting segment (F2F3 segment) along the vertical direction are all 2 mm, that is, the cutting stage with a feed amount between 0 and 2 mm in the vertical direction is defined as the first sub-cutting segment, the cutting stage with a feed amount between 2 and 4 mm in the vertical direction is defined as the second sub-cutting segment, the cutting stage with a feed amount between 4 and 6 mm in the vertical direction is defined as the third sub-cutting segment, and the cutting stage with a feed amount between 6 and 8 mm in the vertical direction is defined as the fourth sub-cutting segment.

[0155] In the second preferred case,

[0156] Step S800, "setting a preset compensation value for the target trajectory to be compensated for correction" specifically includes: setting an arc radius compensation value to correct the cutting radius of the target trajectory to be compensated. The preset compensation value includes the arc radius compensation value.

[0157] Step S900 , controlling the wire cutting machine to cut the workpiece according to the corrected target trajectory to be compensated, specifically includes: in the target compensation cutting stage, controlling the wire cutting machine to cut the workpiece according to the cutting radius of the corrected target trajectory to be compensated.

[0158] After correcting the height of the workpiece to be cut, the center position of the running trajectory of the worktable of the wire cutting machine is determined according to the corrected height of the workpiece to be cut, so that the symmetry of the upper and lower arcs of the arc piece cut according to the corrected center position is significantly improved; on the basis of significantly improving the symmetry of the upper and lower arcs of the cut arc piece, the arc radius compensation value is set to correct the cutting radius of the target trajectory to be compensated, so that the curvature of the corrected target trajectory to be compensated is closer to the curvature of the theoretical cutting trajectory, thereby making the actual cutting trajectory closer to the theoretical cutting trajectory, that is, making the arc shape of the cut arc piece closer to the theoretical arc shape, thereby further improving the symmetry of the upper and lower arcs of the arc piece cut out of the workpiece to be cut.

[0159] In a specific embodiment, in the cutting stage without compensation, the wire cutting machine is controlled to cut the workpiece according to the cutting radius of the theoretical cutting trajectory (for example, the arc radius obtained in step S100).

[0160] Exemplarily, the arc radius compensation value is a negative value, and the corrected cutting radius=arc radius+arc radius compensation value.

[0161] Of course, the arc radius compensation value can also be set to a positive value, with a value range of 0.7-0.95 or any value between 0.8-0.97. The corrected cutting radius can be the product of the arc radius and the arc radius compensation value. This flexible adjustment and change does not deviate from the principle and scope of this application and should be limited within the scope of protection of this application.

[0162] By providing the arc radius compensation value to the cutting trajectory of the target to be compensated cutting stage (target to be compensated trajectory), since the arc radius compensation value is a negative value, it is equivalent to reducing the arc radius of the target to be compensated cutting stage, such as Figure 4 As shown in FIG, this is equivalent to reducing the arc radius of the AFC segment. By reducing the arc radius of the AFC segment, it can be made closer to the theoretical AEC arc.

[0163] In other words, by providing an arc radius compensation value for the target cutting stage to be compensated, the running trajectory of the workbench can be corrected and compensated, so that the cut arc is closer to the theoretical arc.

[0164] In addition, since the arc radius compensation value is only provided for the target cutting stage to be compensated, cutting is still performed according to the original arc radius in the cutting stage without compensation, which has no effect on the cutting stage without compensation. Figure 4 As shown, the arc of the target to be compensated cutting stage is closer to the AEC arc, which can greatly improve the upper and lower symmetry of the cut arc piece.

[0165] It should be noted that, in practical applications, those skilled in the art can set the specific value of the arc radius compensation value through experiments or experience.

[0166] In addition, it should be noted that in actual applications, those skilled in the art may provide only one arc radius compensation value for the target cutting stage to be compensated, or may divide the target cutting stage to be compensated into multiple sub-cutting segments and provide corresponding arc radius compensation values for each sub-cutting segment. Such flexible adjustment and change does not deviate from the principles and scope of the present invention and should be limited within the scope of protection of the present invention.

[0167] Preferably, step S700, based on the theoretical cutting trajectory and the actual cutting trajectory, determines the target trajectory to be compensated from the actual cutting trajectory, specifically including:

[0168] S710: Divide the target cutting stage to be compensated into N sub-cutting segments.

[0169] Wherein, N is an integer not less than 2. For example, N can be set to 2, 3, or 5.

[0170] S720: According to the theoretical cutting trajectory and the actual cutting trajectory, obtain the sub-compensation trajectory corresponding to each sub-cutting segment.

[0171] The target trajectory to be compensated includes a sub-compensation trajectory corresponding to each sub-cutting segment.

[0172] By dividing the target cutting stage to be compensated into N sub-cutting segments and providing a corresponding arc radius compensation value for each sub-cutting segment, the arc shape of the actually cut cutting arc can be infinitely close to the theoretical arc shape.

[0173] It should be noted that, in actual applications, those skilled in the art can flexibly set the specific number of sub-cutting segments based on experiments or experience. For example, the target cutting stage to be compensated can be divided into two sub-cutting segments, or the target cutting stage to be compensated can be divided into three sub-cutting segments, or the target cutting stage to be compensated can be divided into five sub-cutting segments, and so on. Such adjustments and changes to the specific number of sub-cutting segments do not deviate from the principles and scope of the present invention, and should be limited within the scope of protection of the present invention.

[0174] Preferably, step S800, setting the arc radius compensation value to correct the cutting radius of the target trajectory to be compensated, specifically includes:

[0175] For each of the N sub-cutting segments, a radius compensation value is set to correct the cutting radius of the sub-compensation trajectory corresponding to the sub-cutting segment.

[0176] The arc radius compensation value includes the radius compensation value of each sub-compensation trajectory.

[0177] Preferably, step S900, controlling the wire cutting machine to cut the workpiece according to the corrected cutting radius of the target trajectory to be compensated, specifically includes:

[0178] For each of the N sub-cutting segments, the wire cutting machine is controlled to cut the workpiece according to the corrected cutting radius of the sub-cutting trajectory corresponding to the sub-cutting segment.

[0179] For example, N=3, the arc radius compensation value includes three radius compensation values, and the three radius compensation values respectively correct the cutting radius of the three sub-cutting segments.

[0180] It should be noted that, in actual applications, those skilled in the art can make the radius compensation value of each sub-cutting segment different, or, can make the radius compensation value of only some sub-cutting segments different values. Such flexible adjustment and change does not deviate from the principle and scope of the present invention, and should be limited within the scope of protection of the present invention.

[0181] Preferably, the radius compensation value of each sub-cutting segment is a different value.

[0182] That is to say, each sub-cutting segment has a different radius compensation value, and thus has a different cutting radius.

[0183] Further preferably, the radius compensation values of the N sub-cutting segments decrease sequentially from front to back according to the cutting time.

[0184] By decreasing the radius compensation values of the N sub-cutting segments in sequence from the beginning to the end according to the cutting time, it is more advantageous to make the arc shape of the actually cut cutting arc piece closer to the theoretical arc shape.

[0185] Preferred example 1, the N sub-cutting segments include a first sub-cutting segment and a second sub-cutting segment, wherein the first sub-cutting segment is located in front of the second sub-cutting segment, and the radius compensation value of the first sub-cutting segment is greater than the radius compensation value of the second sub-cutting segment.

[0186] That is to say, this embodiment divides the target cutting stage to be compensated into two sub-cutting segments, namely the first sub-cutting segment and the second sub-cutting segment. During the cutting process, the first sub-cutting segment is performed first, and then the second sub-cutting segment is performed, wherein the radius compensation value of the first sub-cutting segment is greater than the radius compensation value of the second sub-cutting segment.

[0187] Preferred example 2, the N sub-cutting segments include a first sub-cutting segment, a second sub-cutting segment and a third sub-cutting segment, wherein the first sub-cutting segment is located in front of the second sub-cutting segment, and the radius compensation value of the first sub-cutting segment is greater than the radius compensation value of the second sub-cutting segment, and the third sub-cutting segment is located behind the second sub-cutting segment, and the radius compensation value of the third sub-cutting segment is less than the radius compensation value of the second sub-cutting segment.

[0188] That is to say, this embodiment divides the target cutting stage to be compensated into three sub-cutting segments, namely the first sub-cutting segment, the second sub-cutting segment and the third sub-cutting segment. During the cutting process, in order of cutting time, they are the first sub-cutting segment, the second sub-cutting segment and the third sub-cutting segment, among which the radius compensation value of the first sub-cutting segment is the largest, the radius compensation value of the second sub-cutting segment is in the middle, and the radius compensation value of the third sub-cutting segment is the smallest.

[0189] It should be noted that, in practical applications, those skilled in the art can flexibly set the feed rate of each sub-cutting segment along the vertical direction based on experiments or experience.

[0190] Preferably, the feed amount of each sub-cutting segment along the vertical direction is any value between 1 and 5 mm.

[0191] Specifically, in practical applications, those skilled in the art can flexibly set the feed amount of each sub-cutting segment along the vertical direction to 1 mm, 2 mm, 3 mm, 4 mm or 5 mm, etc.

[0192] It should be noted that, in actual applications, the feed amount of each sub-cutting segment along the vertical direction may be the same, or the feed amount of each sub-cutting segment along the vertical direction may be different. Such flexible adjustment and change does not deviate from the principle and scope of the present invention, and should be limited within the scope of protection of the present invention.

[0193] Preferably, the feed amount of each sub-cutting segment in the vertical direction is the same.

[0194] Preferred example 3, the N sub-cutting segments include a first sub-cutting segment and a second sub-cutting segment, the first sub-cutting segment is located in front of the second sub-cutting segment, the radius compensation value of the first sub-cutting segment is greater than the radius compensation value of the second sub-cutting segment, and the feed amount of the first sub-cutting segment along the vertical direction is the same as the feed amount of the second sub-cutting segment along the vertical direction.

[0195] That is to say, this embodiment divides the target cutting stage to be compensated into two sub-cutting segments, namely the first sub-cutting segment and the second sub-cutting segment. During the cutting process, the first sub-cutting segment is performed first, and then the second sub-cutting segment is performed, wherein the feed amount of the first sub-cutting segment along the vertical direction is the same as the feed amount of the second sub-cutting segment along the vertical direction.

[0196] For example, the feed amount along the vertical direction of the target cutting stage to be compensated is 8 mm, the feed amount along the vertical direction of the first sub-cutting segment is 4 mm, and the feed amount along the vertical direction of the second sub-cutting segment is also 4 mm, that is, the cutting stage with a feed amount between 0 and 4 mm in the vertical direction is defined as the first sub-cutting segment, and the cutting stage with a feed amount between 4 and 8 mm in the vertical direction is defined as the second sub-cutting segment.

[0197] Preferred example 4, the N sub-cutting segments include a first sub-cutting segment, a second sub-cutting segment and a third sub-cutting segment, the first sub-cutting segment is located in front of the second sub-cutting segment, and the radius compensation value of the first sub-cutting segment is greater than the radius compensation value of the second sub-cutting segment, the third sub-cutting segment is located behind the second sub-cutting segment, and the radius compensation value of the third sub-cutting segment is less than the radius compensation value of the second sub-cutting segment, in addition, the feed amount of the first sub-cutting segment along the vertical direction, the feed amount of the second sub-cutting segment along the vertical direction and the feed amount of the third sub-cutting segment along the vertical direction are all the same.

[0198] That is to say, this embodiment divides the target cutting stage to be compensated into three sub-cutting segments, the first sub-cutting segment, the second sub-cutting segment and the third sub-cutting segment. During the cutting process, in order of cutting time, they are the first sub-cutting segment, the second sub-cutting segment and the third sub-cutting segment, wherein the feed amount of the first sub-cutting segment along the vertical direction, the feed amount of the second sub-cutting segment along the vertical direction and the feed amount of the third sub-cutting segment along the vertical direction are all the same.

[0199] Exemplarily, the feed amount along the vertical direction of the target cutting stage to be compensated is 9 mm, the feed amount along the vertical direction of the first sub-cutting segment, the feed amount along the vertical direction of the second sub-cutting segment, and the feed amount along the vertical direction of the third sub-cutting segment are all 3 mm, that is, the cutting stage with a feed amount along the vertical direction between 0 and 3 mm is defined as the first sub-cutting segment, the cutting stage with a feed amount along the vertical direction between 3 and 6 mm is defined as the second sub-cutting segment, and the cutting stage with a feed amount along the vertical direction between 6 and 9 mm is defined as the third sub-cutting segment.

[0200] In the third preferred situation, the above-mentioned first preferred embodiment and the second preferred embodiment are combined, that is, the target lateral position compensation value, arc radius compensation value and symmetry compensation value are set at the same time, so that step S900 specifically includes: after correcting the height of the workpiece to be cut, and in the target to be compensated cutting stage, according to the corrected lateral coordinates and cutting radius of the target to be compensated trajectory, the wire cutting machine is controlled to cut the workpiece to be cut.

[0201] At this time, after correcting the height of the workpiece to be cut, the center position of the running trajectory of the worktable of the wire cutting machine is determined according to the corrected height of the workpiece to be cut, so that the symmetry of the upper and lower arcs of the arc piece cut according to the corrected center position is significantly improved; on the basis of significantly improving the symmetry of the upper and lower arcs of the cut arc piece, the lateral coordinates of the target trajectory to be compensated are corrected by setting the target lateral position compensation value, so that the lateral coordinates of the corrected target trajectory to be compensated are closer to the lateral coordinates of the theoretical cutting trajectory, and the cutting radius of the target trajectory to be compensated is corrected by setting the arc radius compensation value, so that the curvature of the corrected target trajectory to be compensated is closer to the curvature of the theoretical cutting trajectory, thereby making the actual cutting trajectory closer to the theoretical cutting trajectory; in this way, on the basis that the lateral coordinates of the corrected target trajectory to be compensated are closer to the lateral coordinates of the theoretical cutting trajectory, and the curvature is closer to the curvature of the theoretical cutting trajectory, the symmetry of the upper and lower arcs of the arc piece cut out of the workpiece to be cut can be further improved.

[0202] The present application also provides a control device, which includes a processor and a memory. The memory can be configured to store a program for executing the arc sheet cutting method of the wire cutting machine of the above-mentioned method embodiment, and the processor can be configured to execute the program in the memory, which includes but is not limited to a program for executing the control method of the wire cutting machine of the above-mentioned method embodiment. For ease of explanation, only the parts related to the embodiment of the present invention are shown. For specific technical details not disclosed, please refer to the method part of the embodiment of the present invention. The control device can be a device formed by various electronic devices.

[0203] The present application also provides a wire cutting machine, which includes the above-mentioned control device.

[0204] Specifically, the wire cutting machine is preferably a slicer.

[0205] It should be noted that although the detailed steps of the method of the present application are described in detail above, without departing from the basic principles of the present application, technical personnel in this field can combine, split and change the order of the above steps. The modified technical solution does not change the basic concept of the present application and therefore falls within the scope of protection of the present application.

[0206] Furthermore, those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of this application and to form different embodiments. For example, in the claims of this application, any of the claimed embodiments may be used in any combination.

[0207] In addition, it should be noted that the specific layout and composition of the above-mentioned wire cutting machine is only a preferred embodiment. Without deviating from the principles of this application, those skilled in the art can adjust the composition and setting of the above-mentioned wire cutting machine.

[0208] Thus far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present application.

Claims

1. A method for cutting arc slices using a wire cutting machine, characterized in that: The arc sheet cutting method comprises: Get the actual height of the piece to be cut; Obtaining the arc radius of a cutting arc piece, wherein the cutting arc piece is an arc piece formed by cutting the workpiece to be cut; determining a symmetry compensation value according to the actual height and the arc radius; Correcting the height of the workpiece to be cut according to the symmetry compensation value so that the height difference between the midpoint and the center of the arc of the cut arc piece is less than a preset threshold; After the height of the workpiece to be cut is corrected, the workpiece to be cut is cut by the wire cutting machine.

2. The arc sheet cutting method of the wire cutting machine according to claim 1, characterized in that: The determining of the symmetry compensation value according to the actual height and the arc radius specifically includes: According to the actual height of the workpiece to be cut and the arc radius of the cutting arc, the running track of the worktable of the wire cutting machine is determined and a trial cutting operation is performed; The symmetry compensation value is determined according to the cutting trajectory of the trial-cut arc piece cut out by the trial-cutting operation.

3. The arc sheet cutting method of the wire cutting machine according to claim 2, characterized in that: The determining of the symmetry compensation value according to the cutting trajectory of the trial-cut arc piece cut out by the trial-cutting operation specifically includes: Determine the vertical distance d between the center point of the cutting trajectory of the trial arc and the vertical center line, wherein the vertical center line is the center line of the workpiece to be cut in the vertical direction; Determining the relative position of the center point of the circle and the vertical center line; The symmetry compensation value is determined according to the vertical distance d and the relative position.

4. The arc sheet cutting method of the wire cutting machine according to claim 3, characterized in that: The determining the symmetry compensation value according to the vertical distance d and the relative position specifically includes: If the relative position characterizes that the center point of the circle is located below the vertical center line, determining the symmetry compensation value according to the vertical distance d and a first compensation coefficient, wherein the first compensation coefficient is a negative value; If the relative position characterizes that the center point of the circle is located above the vertical center line, the symmetry compensation value is determined according to the vertical distance d and a second compensation coefficient, wherein the second compensation coefficient is a positive value.

5. The arc sheet cutting method of the wire cutting machine according to claim 1, characterized in that: Before cutting the workpiece by the wire cutting machine, the arc sheet cutting method further includes: Controlling the wire cutting machine to automatically drive the workbench to move to the cutting starting position; The cutting starting point is the starting point of the workbench pre-recorded during a trial cutting operation.

6. The arc sheet cutting method of a wire cutting machine according to any one of claims 1 to 5, characterized in that: The preset threshold is no greater than 0.3 mm.

7. The arc sheet cutting method of the wire cutting machine according to claim 1, characterized in that: After the step of "obtaining the arc radius of the arc slice to be cut", the arc slice cutting method further comprises: Determining a theoretical cutting trajectory and an actual cutting trajectory of the workpiece to be cut according to the actual height and the arc radius; According to the theoretical cutting trajectory and the actual cutting trajectory, determining a target trajectory to be compensated from the actual cutting trajectory, wherein the target trajectory to be compensated is a trajectory in the actual cutting trajectory that does not overlap with the theoretical cutting trajectory; Setting a preset compensation value for the target trajectory to be compensated for correction; After correcting the height of the workpiece to be cut, and in the target cutting stage to be compensated, the wire cutting machine is controlled to cut the workpiece to be cut according to the corrected target trajectory to be compensated, wherein the target cutting stage to be compensated is the cutting stage corresponding to the target trajectory to be compensated.

8. The arc sheet cutting method of the wire cutting machine according to claim 7, characterized in that: The step of setting a preset compensation value for the target trajectory to be compensated and performing correction specifically includes: Setting a target lateral position compensation value to correct the lateral coordinate of the target trajectory to be compensated, wherein the preset compensation value includes the target lateral position compensation value; The step of controlling the wire cutting machine to cut the workpiece according to the corrected target trajectory to be compensated specifically includes: According to the corrected transverse coordinates of the target trajectory to be compensated, the wire cutting machine is controlled to cut the workpiece to be cut.

9. The arc sheet cutting method of the wire cutting machine according to claim 8, characterized in that: The step of determining a target trajectory to be compensated from the actual cutting trajectory according to the theoretical cutting trajectory and the actual cutting trajectory specifically includes: Dividing the target cutting stage to be compensated into N sub-cutting segments, where N is an integer not less than 2; According to the theoretical cutting trajectory and the actual cutting trajectory, a sub-compensation trajectory corresponding to each sub-cutting segment is acquired, wherein the target trajectory to be compensated includes a sub-compensation trajectory corresponding to each sub-cutting segment.

10. The arc sheet cutting method of the wire cutting machine according to claim 9, characterized in that: The step of setting the target lateral position compensation value to correct the lateral coordinate of the target trajectory to be compensated specifically includes: For each of the N sub-cutting segments, a lateral position compensation value is set, and the lateral coordinate of the end point of the sub-compensation trajectory corresponding to the sub-cutting segment is corrected; The target lateral position compensation value includes a lateral position compensation value of each sub-cutting segment.

11. The arc sheet cutting method of the wire cutting machine according to claim 10, characterized in that: The lateral position compensation value of the sub-cutting segment located at the last cutting position among the N sub-cutting segments is 0.

12. The arc sheet cutting method of the wire cutting machine according to claim 11, characterized in that: The step of controlling the wire cutting machine to cut the workpiece according to the corrected transverse coordinate of the target trajectory to be compensated comprises: Obtaining a corrected compensation trajectory of each of the N sub-cutting segments; For each of the N sub-cutting segments, the wire cutting machine is controlled to cut the workpiece to be cut using the corrected compensation trajectory of the sub-cutting segment.

13. The arc sheet cutting method of the wire cutting machine according to claim 7, characterized in that: The step of setting a preset compensation value for the target trajectory to be compensated and performing correction specifically includes: Setting an arc radius compensation value to correct the cutting radius of the target trajectory to be compensated, wherein the preset compensation value includes the arc radius compensation value; The step of controlling the wire cutting machine to cut the workpiece according to the corrected target trajectory to be compensated specifically includes: According to the corrected cutting radius of the target trajectory to be compensated, the wire cutting machine is controlled to cut the workpiece to be cut.

14. The arc sheet cutting method of the wire cutting machine according to claim 13, characterized in that: The step of determining a target trajectory to be compensated from the actual cutting trajectory according to the theoretical cutting trajectory and the actual cutting trajectory specifically includes: Dividing the target cutting stage to be compensated into N sub-cutting segments, where N is an integer not less than 2; According to the theoretical cutting trajectory and the actual cutting trajectory, a sub-compensation trajectory corresponding to each sub-cutting segment is acquired, wherein the target trajectory to be compensated includes a sub-compensation trajectory corresponding to each sub-cutting segment.

15. The arc sheet cutting method of the wire cutting machine according to claim 14, characterized in that: The step of setting the arc radius compensation value to correct the cutting radius of the target trajectory to be compensated specifically includes: For each of the N sub-cutting segments, a radius compensation value is set to correct a cutting radius of a sub-compensation trajectory corresponding to the sub-cutting segment; The arc radius compensation value includes the radius compensation value of each sub-compensation trajectory.

16. The arc sheet cutting method of the wire cutting machine according to claim 15, characterized in that: The controlling the wire cutting machine to cut the workpiece according to the corrected cutting radius of the target trajectory to be compensated specifically includes: For each of the N sub-cutting segments, the wire cutting machine is controlled to cut the workpiece according to the corrected cutting radius of the sub-cutting trajectory corresponding to the sub-cutting segment.

17. The arc sheet cutting method of the wire cutting machine according to claim 16, characterized in that: The radius compensation values of the N sub-cutting segments decrease in sequence from front to back according to the cutting sequence.

18. The arc sheet cutting method of the wire cutting machine according to claim 17, characterized in that: The N sub-cutting segments include a first sub-cutting segment and a second sub-cutting segment, the first sub-cutting segment is located in front of the second sub-cutting segment, and a radius compensation value of the first sub-cutting segment is greater than a radius compensation value of the second sub-cutting segment.

19. The arc sheet cutting method of the wire cutting machine according to claim 18, characterized in that: The N sub-cutting segments further include a third sub-cutting segment, which is located behind the second sub-cutting segment, and a radius compensation value of the third sub-cutting segment is smaller than a radius compensation value of the second sub-cutting segment.

20. A control device, characterized in that: The method comprises a processor and a memory, wherein the memory is suitable for storing a plurality of program codes, and the program codes are suitable for being loaded and run by the processor to execute the arc sheet cutting method of the wire cutting machine according to any one of claims 1 to 19.

21. A wire cutting machine, characterized in that: The wire cutting machine includes the control device according to claim 20.

22. The arc sheet cutting method of the wire cutting machine according to claim 21, characterized in that: The wire cutting machine includes a frame and a cutting assembly and a feed assembly mounted on the frame. The feed assembly includes a workbench, a first drive mechanism and a second drive mechanism. The first drive mechanism is used to drive the workbench to move vertically relative to the cutting assembly with the workpiece to be cut, and the second drive mechanism is used to drive the workbench to move horizontally relative to the cutting assembly with the workpiece to be cut.

23. The wire cutting machine according to claim 22, characterized in that The wire cutting machine is a slicer.

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