CN115070146A - Wire cut electric discharge machine and reverse interpolation system thereof - Google Patents
Wire cut electric discharge machine and reverse interpolation system thereof Download PDFInfo
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- CN115070146A CN115070146A CN202210734043.7A CN202210734043A CN115070146A CN 115070146 A CN115070146 A CN 115070146A CN 202210734043 A CN202210734043 A CN 202210734043A CN 115070146 A CN115070146 A CN 115070146A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
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- B23H7/02—Wire-cutting
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Abstract
The invention provides a wire cut electric discharge machine and a reverse interpolation system thereof, comprising a control component, a driving component, a workbench, a pulse power supply and a wire electrode arranged above the workbench; the driving component is configured to drive the workbench to move transversely or longitudinally; the control component is configured to implement the following steps by executing a computer program stored therein: obtaining a current deviation discrimination function, and determining the feeding direction of the last interpolation according to the current deviation discrimination function; acquiring a last deviation discrimination function, and recovering the value of the last deviation discrimination function to generate an original deviation discrimination function; generating a coordinate value of a previous processing point according to the original deviation discrimination function and the direction opposite to the feeding direction; and controlling the driving assembly to move to the last processing point position according to the coordinate value. In addition, when the wire cut electric discharge machine system is suddenly powered off, the conventional method for moving the wire electrode needs to recalculate the interpolation value, and the operation is complex.
Description
Technical Field
The invention relates to the technical field of wire cut electrical discharge machining, in particular to a wire cut electrical discharge machine and a reverse interpolation system of the wire cut electrical discharge machine.
Background
The wire cut electric discharge machine is one of important branches in special machining modes, and novel materials with high hardness and high strength are machined to manufacture high-precision parts; the wire cutting of the wire cut electric discharge machine is to remove materials by means of electric heating action during discharging, the wire cutting is irrelevant to the mechanical property of the materials to be processed in the processing process, and a tool electrode is not in direct contact with the surface of a workpiece, so that no mechanical cutting force exists, digital control can be realized by controlling electrical parameters and the like in the processing process, the wire cut electric discharge machine is easy to process precise workpieces with complex shapes, particularly has the advantages incomparable to the traditional cutting in the aspect of difficult-to-process materials, and plays an important role in industries such as die manufacturing, forming cutter processing, precise micro machinery and the like.
When the wire-cut electric discharge machine is used, once the wire-cut electric discharge machine system is suddenly powered off, even if the wire-cut electric discharge machine system is powered on again, the wire-cut electric discharge machine tool does not act, and a tool electrode wire still stays at the position of the last breakpoint. To solve this problem, the following three operation methods are mostly adopted for processing: 1. after the electrode wire is taken down, the electrode wire is positioned to a mechanical origin, namely the electrode wire is taken down from a wire storage cylinder, and an X axis and a Y axis return to the mechanical origin by a nearest line, however, the electrode wire needs to be threaded again in the method, so that the electrode wire can be processed again, and the operation is complex; 2. the electrode wire reversely returns to the cutting point along the cutting path, but the method needs to recalculate the interpolation value and has complex operation; 3. and backing a distance, re-electrifying and then cutting again, wherein the method can also back a distance in order to adjust a discharge gap and avoid short circuit or wire breakage, and the interpolation value also needs to be recalculated, so that the operation is complex.
In view of this, the present application is presented.
Disclosure of Invention
The invention aims to provide a wire-cut electric discharge machine and a reverse interpolation system thereof, and aims to solve the problem that the wire-cut electric discharge machine in the prior art cannot work continuously quickly after being powered on again after being powered off.
The invention provides a reverse interpolation system of a wire cut electric discharge machine, which comprises a control component, a driving component, a workbench, a pulse power supply and a wire electrode arranged above the workbench, wherein the wire electrode is connected with the workbench through a wire;
the power end of the control assembly, the power end of the driving assembly and the wire electrode are electrically connected with the pulse power supply, the output end of the control assembly is electrically connected with the input end of the driving assembly, and the output shaft of the driving assembly is connected with the workbench;
wherein the driving component is configured to drive the workbench to move transversely or longitudinally;
wherein the control component is configured to implement the following steps by executing a computer program stored therein:
acquiring a current deviation discrimination function, and determining the feeding direction of the last interpolation according to the current deviation discrimination function;
acquiring a last deviation discrimination function, and recovering the value of the last deviation discrimination function to generate an original deviation discrimination function;
generating a coordinate value of a previous processing point position according to the original deviation discrimination function and the direction opposite to the feeding direction;
and controlling the driving assembly to drive the workbench to move to the last processing point position according to the coordinate value.
Preferably, the obtaining of the current deviation discriminant function and the determining of the feeding direction of the last interpolation according to the current deviation discriminant function are specifically:
acquiring a current deviation discrimination function, and determining an interpolation type and a quadrant type of the previous step according to the deviation discrimination function;
when the feeding direction of the last interpolation is the X-axis direction, generating a first deviation discriminant function according to the interpolation type and the quadrant type;
when the feeding direction of the last interpolation is the Y-axis direction, generating a second deviation discriminant function according to the interpolation type and the quadrant type;
and performing reverse calculation on the first deviation discrimination function and the second deviation discrimination function according to the quadrant type and a calculation formula corresponding to the quadrant type to generate the feeding direction of the last interpolation.
Preferably, the performing a back-stepping calculation on the first deviation discriminant function and the second deviation discriminant function according to the quadrant type and a calculation formula corresponding to the quadrant type specifically includes:
when the deviation is not less than zero, generating a first relational expression between the deviation discriminant function and the last deviation discriminant function according to the calculation formula;
when the deviation is less than zero, generating a second relational expression between the deviation discriminant function and the last deviation discriminant function according to the calculation formula;
and generating the feeding direction of the last interpolation according to the quadrant type, the first relational expression, the second relational expression, the first deviation discriminant function and the second deviation discriminant function.
Preferably, the control assembly comprises a controller, an output end of the pulse power supply is electrically connected with a power supply end of the controller, and an output end of the controller is electrically connected with an input end of the driving assembly.
Preferably, the driving assembly includes a driver, a first driving motor, and a second driving motor, an input end of the driver is electrically connected to an output end of the controller, an output end of the driver is electrically connected to an input end of the first driving motor and an input end of the second driving motor, a power supply end of the first driving motor and a power supply end of the second driving motor are electrically connected to an output end of the pulse power supply, and an output shaft of the first driving motor and an output shaft of the second driving motor are connected to the worktable.
Preferably, the first driving motor is configured to drive the worktable to move along the X-axis direction, and the second driving motor is configured to drive the worktable to move along the Y-axis direction.
Preferably, the first driving motor is a linear motor.
Preferably, the second driving motor is a linear motor.
The invention also provides a wire cut electric discharge machine, which comprises the reverse interpolation system of the wire cut electric discharge machine.
In summary, according to the wire-cut electric discharge machine and the wire-cut electric discharge machine reverse interpolation system thereof provided by this embodiment, when the wire-cut electric discharge machine reverse interpolation system suddenly loses power, the control component may determine the feeding direction and the discrimination function value of the last interpolation according to the obtained current deviation discrimination function, and generate the coordinate value of the last machining point according to the obtained opposite direction of the feeding direction and the discrimination function value of the last interpolation, and the control component may use the calculated coordinate value data as the control signal of the driving component to control the movement of the table along the X-axis direction or the Y-axis direction until the table moves to the last machining point; therefore, the problem that once the wire cut electric discharge machine system is suddenly powered off in the using process of the wire cut electric discharge machine in the prior art, even if the wire cut electric discharge machine system is powered on and started again, a wire electrode of a tool of the wire cut electric discharge machine still stays at the position of a previous breakpoint; the existing method for solving the problem needs to recalculate the interpolation value, thereby causing the problem of complex operation of the wire-cut electric discharge machine.
Drawings
Fig. 1 is a schematic structural diagram of a reverse interpolation system of a wire-cut electric discharge machine according to an embodiment of the present invention.
Fig. 2 is a schematic flow chart of a reverse interpolation system of a wire-cut electric discharge machine according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a relationship list of feeding and deviation calculation of linear interpolation according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a linear reverse interpolation list according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a relation list of feed and deviation calculation of circular interpolation according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of a circular arc reverse interpolation list according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive efforts based on the embodiments of the present invention, are within the scope of protection of the present invention.
The following detailed description of specific embodiments of the invention refers to the accompanying drawings.
Referring to fig. 1, a first embodiment of the present invention provides a reverse interpolation system for a wire cut electric discharge machine, including a control assembly 1, a driving assembly, a worktable 2, a pulse power supply 3, and a wire electrode 4 disposed above the worktable 2;
the power end of the control assembly 1, the power end of the driving assembly and the wire electrode 4 are electrically connected with the pulse power supply 3, the output end of the control assembly 1 is electrically connected with the input end of the driving assembly, and the output shaft of the driving assembly is connected with the workbench 2;
wherein the driving component is configured to drive the worktable 2 to move transversely or longitudinally;
as one of the important branches of the special machining mode, wire cut electrical discharge machining is used for machining novel materials with high hardness and high strength to manufacture high-precision parts; the wire cutting process is to remove material by electric heating action during discharging, and has no relation with the mechanical property of the processed material in the process of processing, and the tool electrode does not contact with the surface of the workpiece directly, so that no mechanical cutting force exists, digital control can be realized by controlling electrical parameters and the like in the process of processing, the precision workpiece with complex shape is easy to process, especially the precision workpiece with incomparable traditional cutting has the advantages in the aspect of difficult-to-process material, and the wire cutting process plays an important role in industries such as die manufacturing, forming cutter processing, precision micro-machinery and the like.
The principle of wire cut electrical discharge machining is to use a continuously moving wire as a tool electrode, leave a discharge gap of about 0.01mm between the tool electrode and a workpiece, form a positive electrode and a negative electrode between the tool electrode and the workpiece, then carry out pulse spark discharge to electroerode the workpiece, and clean the workpiece with an insulating working fluid to ensure that the gap is continuously discharged, thereby obtaining the shape of the required part. According to the running speed of the wire electrode, the wire cut electric discharge machine is divided into two types: one is fast wire-moving, the general wire-moving speed is 8-12 m/s, the other is slow wire-moving, the general wire-moving speed is lower than 0.2m/s, and the slow wire-moving wire cutting machine has higher processing precision than the fast wire-moving wire cutting machine. The wire cut electric discharge machine has linear and circular interpolation algorithms, for linear interpolation, the coordinate of an end point relative to a starting point and the total interpolation step length need to be known, and for circular interpolation, the coordinate of the starting point relative to a circle center and the total interpolation step length need to be known.
The interpolation calculation accuracy is directly related to the processing accuracy, and the interpolation calculation accuracy is a process of carrying out data encryption on a space between a starting point and an end point of one section of straight line (curve) of the central track of the electrode wire by the industrial personal computer to obtain coordinate values of a plurality of intermediate points. The data of a section of straight line (curve) track after interpolation calculation is used as a control signal of the motor, so that the motion directions of an X axis and a Y axis can be controlled, and the control signal is sent to the singlechip and then sent to the execution element from the singlechip. When the wire-cut electric discharge machine is used, once the wire-cut electric discharge machine system is suddenly powered off, even if the wire-cut electric discharge machine system is powered on again, the wire-cut electric discharge machine tool does not act, and a tool electrode wire still stays at the position of the last breakpoint. To solve this problem, the following three operation methods are mostly adopted for processing: 1. after the electrode wire is taken down, the electrode wire is positioned to a mechanical origin, namely the electrode wire is taken down from a wire storage cylinder, and an X axis and a Y axis return to the mechanical origin by a nearest line, however, the electrode wire needs to be threaded again in the method, so that the electrode wire can be processed again, and the operation is complex; 2. the electrode wire reversely returns to the cutting point along the cutting path, but the method needs to recalculate the interpolation value and has complex operation; 3. and backing a distance, and cutting again after electrifying, wherein the method also needs to recalculate the interpolation value for the purpose of adjusting the discharge gap and avoiding short circuit or wire breakage and has complex operation.
Referring to fig. 2, the control assembly 1 is configured to implement the following steps by executing a computer program stored therein:
s101, acquiring a current deviation discrimination function, and determining the feeding direction of the last interpolation according to the current deviation discrimination function;
specifically, in this embodiment, a current deviation discriminant function is obtained, and an interpolation type and a quadrant type of a previous step are determined according to the deviation discriminant function;
when the feeding direction of the last interpolation is the X-axis direction, generating a first deviation discriminant function according to the interpolation type and the quadrant type;
when the feeding direction of the last interpolation is the Y-axis direction, generating a second deviation discriminant function according to the interpolation type and the quadrant type;
and performing reverse calculation on the first deviation discrimination function and the second deviation discrimination function according to the quadrant type and a calculation formula corresponding to the quadrant type to generate the feeding direction of the last interpolation.
Performing back-stepping calculation on the first deviation discrimination function and the second deviation discrimination function according to the quadrant type and a calculation formula corresponding to the quadrant type, specifically:
when the deviation is not less than zero, generating a first relational expression between a deviation discrimination function and a last deviation discrimination function according to the calculation formula;
when the deviation is less than zero, generating a second relational expression between the deviation discriminant function and the last deviation discriminant function according to the calculation formula;
and generating the feeding direction of the last interpolation according to the quadrant type, the first relational expression, the second relational expression, the first deviation discriminant function and the second deviation discriminant function.
Referring to fig. 3 to 4, the starting point coordinate is (X) s ,Y s )，The coordinate of the end point is (X) e ,Y e ) F is a deviation function, S represents a forward arc, N represents a reverse arc, and I and IV represent quadrants. In this embodiment, taking the linear interpolation in the first quadrant as an example, let the discriminant function of the deviation after the normal interpolation calculation be F n+1 The last deviation discriminant function is F n According to the calculation formula of the single step tracing of the first quadrant:
if the previous step is fed by Δ X, F n+1 ＝F n -Y e If the previous step is fed by DeltaY, then F n+1 ＝F n +X e . Assuming the last step is fed by Δ X, there is F n ＝F n+1 +Y e (ii) a If the assumption is true, then there are: relation (1) F nt ＝F n+1 +Y e ＝(F n -Y e )+Y e ＝F n Wherein F is at Is the deviation discriminant function when the assumption is true. If the assumption is false, then: relation (2) F nf ＝F n+1 +Y e ＝(F n +X e )+Y e Wherein F is af Is the deviation discriminant function when the assumption is false.
According to the calculation formula of the first quadrant single step tracking method:
if F n Not less than 0, feeding forward one step to X axis, F n ＝F n+1 -Y e ≥-Y e ；
If F n <0, forward feed one step to Y-axis, F n+1 ＝F n +X e <X e ；
Then F n+1 The following conditions should be satisfied: relation (3) -Y e ≤F n+1 <X e ，
In the same way, F n It should also satisfy: relation (4) -Y e ≤F n <X e 。
Due to F nt ＝F n so-Y e ≤F nt <X e ，F nf ＝F n +X e +Y e Due to the first quadrant Y e Not less than 0, therefore, F nf ≥X e +Y e -Y e ＝X e Therefore, -Y e ≤F nt <X e ≤F nf 。
Accordingly: if F n+1 +Y e -X e <0, judging that the last feeding direction is the X-axis positive direction; if F n+1 +Y e -X e And if the speed is more than or equal to 0, judging that the last feeding direction is the Y-axis positive direction.
S102, acquiring a last deviation discrimination function, and recovering the value of the last deviation discrimination function to generate an original deviation discrimination function;
specifically, in this embodiment, taking the linear interpolation in the first quadrant as an example, if F is n+1 +Y e -X e <0, the previous feeding direction is determined to be the X-axis positive direction, and the relation (5) F n ＝F n+1 +Y e . If F n+1 +Y e -X e Is more than or equal to 0. If F n+1 +Y e -X e If not less than 0, the last feeding direction can be judged to be the Y-axis positive direction, and the relation (6) F n ＝F n+1 -X e 。
S103, generating a coordinate value of a previous machining point position according to the original deviation discrimination function and the direction opposite to the feeding direction;
and S104, controlling the driving assembly to drive the workbench to move to the last processing point position according to the coordinate value.
Specifically, in this embodiment, taking the linear interpolation in the first quadrant as an example, the feeding direction of the previous interpolation can be strictly determined according to the current deviation discrimination function, and the value of the deviation discrimination function can be recovered; the reverse direction of the previous feeding direction is taken as the feeding direction of the current time, the feeding device can strictly retreat along the original path, and other quadrants can be similarly pushed out. According to the same principle, a reverse interpolation formula of the circular arc can be obtained, as shown in fig. 5 to 6.
Specifically, in this embodiment, when the wire-cut electric discharge machine reverse interpolation system is powered down suddenly, the control component 1 determines the feeding direction and the discrimination function value of the last interpolation according to the obtained current deviation discrimination function, and generates the coordinate value of the last machining point according to the obtained opposite direction of the feeding direction and the discrimination function value of the last interpolation, and the control component 1 uses the calculated coordinate value data as the control signal of the driving component to control the table 2 to move along the X-axis direction or the Y-axis direction until the table 2 moves to the last machining point; therefore, the problem that once the wire cut electric discharge machine system is suddenly powered off in the using process of the wire cut electric discharge machine in the prior art, even if the wire cut electric discharge machine system is powered on and started again, a wire electrode of a tool of the wire cut electric discharge machine still stays at the position of a previous breakpoint; the existing method for solving the problem needs to recalculate the interpolation value, thereby causing the problem of complex operation of the wire-cut electric discharge machine.
Referring to fig. 2, in one possible embodiment of the present invention, the control assembly 1 includes a controller 11, an output terminal of the pulse power supply 3 is electrically connected to a power supply terminal of the controller 11, and an output terminal of the controller 11 is electrically connected to an input terminal of the driving assembly.
Specifically, in this embodiment, the machining process of the wire-cut electric discharge machine is a micro-transient physical process, in which a wire electrode is used as an anode, a workpiece is used as a cathode, and when the machine tool operates, a certain pulse voltage is applied between the wire electrode and the workpiece to form an electric field in a certain range, where the intensity of the electric field is inversely proportional to the distance between the wire electrode and the workpiece and is directly proportional to the applied voltage, so that when the distance between the wire electrode and the workpiece decreases, the electric field intensity between the two electrodes increases continuously, and the electric field intensity at the minimum distance between the two electrodes is the maximum, and when the electric field intensity between the electrode and the workpiece increases to a certain degree, electrons are emitted from the cathode to rapidly extend the ionization from the cathode to the anode to form a discharge channel. When the controller 11 calculates the feeding direction and the discrimination function value of the last interpolation, the data is transmitted to the driving module as a control signal.
In one possible embodiment of the present invention, the driving assembly includes a driver 5, a first driving motor 6, and a second driving motor 7, an input end of the driver 5 is electrically connected to an output end of the controller 11, an output end of the driver 5 is electrically connected to an input end of the first driving motor 6 and an input end of the second driving motor 7, a power end of the first driving motor 6 and a power end of the second driving motor 7 are electrically connected to an output end of the pulse power supply 3, and an output shaft of the first driving motor 6 and an output shaft of the second driving motor 7 are connected to the worktable 2.
The first driving motor 6 is configured to drive the worktable 2 to move along the X-axis direction, and the second driving motor 7 is configured to drive the worktable 2 to move along the Y-axis direction.
Specifically, in this embodiment, the reverse interpolation system of the wire-cut electric discharge machine is a two-axis linkage system, the interpolation of which only needs to be calculated in the XY plane, and the coordinates of the starting point are set to be (X) s ,Y s ) The end point coordinate is (X) e ,Y e ) F is a deviation function, S represents a forward arc, N represents a reverse arc, and I and IV represent quadrants. After the driver 5 receives the control signal transmitted by the controller 11, the driver 5 may drive the first driving motor 6 or the second driving motor 7 to move, and when the control signal is a moving signal in the X-axis direction, the first driving motor 6 may drive the worktable 2 to move along the X-axis direction; when the control signal is a Y-axis direction moving signal, the second driving motor 7 drives the worktable 2 to move along the Y-axis direction. It should be noted that, in other embodiments, other types of moving directions may also be adopted, which are not specifically limited herein, but these schemes are all within the protection scope of the present invention.
In one possible embodiment of the invention, the first drive motor 6 may be a linear motor. The second driving motor 7 may be a linear motor.
Specifically, in this embodiment, the linear motor is also called a linear motor, and the linear motor is a transmission device that directly converts electric energy into linear motion mechanical energy without any intermediate conversion mechanism, and the linear motor is steadily increasing in practical industrial applications and is widely used at present. Compared with a rotating motor, the linear motor has the advantages of simpler structure, high positioning precision, high reaction speed, safe and reliable work and long service life. It should be noted that, in other embodiments, other types of the first driving motor and the second driving motor may also be used, which is not specifically limited herein, but these schemes are all within the protection scope of the present invention.
In summary, the reverse interpolation technique is an important control technique in a wire-cut electric discharge machine, and its calculation accuracy is directly related to the machining accuracy of a machine tool and the surface quality of a part. In the wire-cut electric discharge machining, the reverse interpolation system of the wire-cut electric discharge machine is adopted, when interpolation calculation is carried out, all two-dimensional outlines of a wire-cut part are considered in a linear or circular arc approximation mode and are actually applied to a linear motor driving module, under the condition that influence of other factors is not considered, a machining error does not exceed one pulse equivalent, and the machining requirement of the machine tool can be completely met.
A first embodiment of the invention provides a wire electric discharge machine comprising a reverse interpolation system of a wire electric discharge machine as described in any one of the above.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention.
Claims (9)
1. A reverse interpolation system of a wire cut electric discharge machine is characterized by comprising a control component, a driving component, a workbench, a pulse power supply and a wire electrode arranged above the workbench;
the power end of the control assembly, the power end of the driving assembly and the wire electrode are electrically connected with the pulse power supply, the output end of the control assembly is electrically connected with the input end of the driving assembly, and the output shaft of the driving assembly is connected with the workbench;
wherein the driving component is configured to drive the workbench to move transversely or longitudinally;
wherein the control component is configured to implement the following steps by executing a computer program stored therein:
acquiring a current deviation discrimination function, and determining the feeding direction of the last interpolation according to the current deviation discrimination function;
acquiring a last deviation discrimination function, and recovering the value of the last deviation discrimination function to generate an original deviation discrimination function;
generating a coordinate value of a previous processing point position according to the original deviation discrimination function and the direction opposite to the feeding direction;
and controlling the driving assembly to drive the workbench to move to the last processing point position according to the coordinate value.
2. The system for reverse interpolation of a wire-cut electric discharge machine according to claim 1, wherein a current deviation discriminant function is obtained, and a feeding direction of a last interpolation is determined according to the current deviation discriminant function, specifically:
acquiring a current deviation discrimination function, and determining an interpolation type and a quadrant type of the previous step according to the deviation discrimination function;
when the feeding direction of the last interpolation is the X-axis direction, generating a first deviation discriminant function according to the interpolation type and the quadrant type;
when the feeding direction of the last interpolation is the Y-axis direction, generating a second deviation discrimination function according to the interpolation type and the quadrant type;
and performing reverse calculation on the first deviation discrimination function and the second deviation discrimination function according to the quadrant type and a calculation formula corresponding to the quadrant type to generate the feeding direction of the last interpolation.
3. The system according to claim 2, wherein the first deviation criterion function and the second deviation criterion function are calculated by inverse interpolation according to the quadrant type and a calculation formula corresponding to the quadrant type, specifically:
when the deviation is not less than zero, generating a first relational expression between the deviation discriminant function and the last deviation discriminant function according to the calculation formula;
when the deviation is less than zero, generating a second relational expression between the deviation discriminant function and the last deviation discriminant function according to the calculation formula;
and generating the feeding direction of the last interpolation according to the quadrant type, the first relational expression, the second relational expression, the first deviation discriminant function and the second deviation discriminant function.
4. The reverse interpolation system of claim 1, wherein the control assembly comprises a controller, an output of the pulse power supply is electrically connected to a power supply terminal of the controller, and an output of the controller is electrically connected to an input of the drive assembly.
5. The reverse interpolation system of claim 4, wherein the drive assembly comprises a driver, a first drive motor, and a second drive motor, an input of the driver is electrically connected to an output of the controller, an output of the driver is electrically connected to an input of the first drive motor and an input of the second drive motor, a power supply terminal of the first drive motor and a power supply terminal of the second drive motor are electrically connected to an output of the pulse power supply, and an output shaft of the first drive motor and an output shaft of the second drive motor are connected to the worktable.
6. The reverse interpolation system of claim 5, wherein the first drive motor is configured to move the table along an X-axis direction, and the second drive motor is configured to move the table along a Y-axis direction.
7. The reverse interpolation system of claim 5, wherein the first drive motor is a linear motor.
8. The reverse interpolation system of the wire-cut electric discharge machine according to claim 5, wherein the second driving motor is a linear motor.
9. A wire electric discharge machine comprising a reverse interpolation system of a wire electric discharge machine according to any one of claims 1 to 8.
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| CN202210734043.7A CN115070146A (en) | 2022-06-27 | 2022-06-27 | Wire cut electric discharge machine and reverse interpolation system thereof |
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| CN202210734043.7A CN115070146A (en) | 2022-06-27 | 2022-06-27 | Wire cut electric discharge machine and reverse interpolation system thereof |
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