CN117066617B - In-situ measuring and compensating method for edge shape of scanning type wire cut electric discharge machine - Google Patents
In-situ measuring and compensating method for edge shape of scanning type wire cut electric discharge machineInfo
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- CN117066617B CN117066617B CN202310840743.9A CN202310840743A CN117066617B CN 117066617 B CN117066617 B CN 117066617B CN 202310840743 A CN202310840743 A CN 202310840743A CN 117066617 B CN117066617 B CN 117066617B
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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
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
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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
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
The invention discloses an in-situ measuring and compensating method for the edge shape of a scanning wire-cut electric discharge machining workpiece, which comprises the steps of obtaining cutting data of the wire electrode machining workpiece; the method comprises the steps of carrying out electrode wire movement according to a workpiece machining parameter and a tension control parameter and according to an upper machine head movement track and a lower machine head movement track respectively, measuring and obtaining tension adjustment wheel change data generated when the electrode wire is in contact with a workpiece, obtaining a possible position curve of a contact point of the electrode wire and the workpiece during single measurement according to the tension adjustment wheel change data and track planning data, obtaining a possible position curve of the contact point according to all the possible position curves of the contact point, carrying out intersection treatment on a workpiece plane and the possible position curve of the contact point to obtain a workpiece edge shape, and carrying out data processing according to the workpiece edge shape to carry out machining precision compensation. According to the invention, the workpiece is not required to be taken down for measurement, so that the in-situ measurement and the subsequent error characterization and compensation correction steps can be realized, and the efficiency and the precision of wire cutting processing are improved.
Description
Technical Field
The invention relates to the technical field of special machining, in particular to an in-situ measuring and compensating method for the edge shape of a scanning type wire-cut electric discharge machining workpiece.
Background
Wire electric discharge machining is machining of parts by the principle of electric discharge by electric spark. The workpiece is connected to the positive pole of the pulse power supply, molybdenum wires or copper wires are used as cutting metal wires, the metal wires are connected to the negative pole of the high-frequency pulse power supply and used as tool electrodes, and spark discharge is used for cutting the machined parts. The wire-cut electric discharge machining technology is used as one of special machining technologies, and can be used for machining any material with hardness, strength and brittleness without the limitation of traditional mechanical force and mechanical energy. The technology plays an important role in the field of machining by virtue of the characteristics of strong applicability, high precision, low cost and the like, and is widely applied to the industrial fields of automobiles, machine tool production, aerospace and the like.
But wire cutting is difficult to carry out in-situ measurement and precision compensation like other machining modes, and the existing wire cutting machining mainly comprises the steps of clamping a workpiece, setting parameters, machining, taking down measurement and error characterization, re-clamping a new workpiece, adjusting parameters, machining, taking down measurement and error characterization until errors meet requirements, and the machining parameters are used for batch machining. The processing mode has low processing efficiency, the processing precision is relatively slow to obtain and difficult to ensure, and the processing application is seriously influenced. Therefore, it is necessary to design an efficient and accurate in-situ measurement method and an accuracy compensation method.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
Therefore, the invention provides an in-situ measuring and compensating method for the edge shape of a workpiece cut by a scanning wire-cut electric discharge machine, which can enable a wire electrode to contact with the edge of the workpiece by controlling the movement of a machine head on a machine tool, and the wire electrode performs continuous scanning movement on the edge of the workpiece. And the size and shape of the workpiece are obtained by controlling the tension of the electrode wire to be constant and recording the change data of the tension adjusting wheel and combining the plane data of the workpiece.
Another object of the present invention is to provide an in-situ measuring and compensating device for the edge shape of a workpiece cut by a scanning wire electric discharge machine.
In order to achieve the above object, one aspect of the present invention provides a method for in-situ measuring and compensating an edge shape of a workpiece by scanning wire-cut electric discharge machining, comprising:
Acquiring cutting data of a workpiece processed by an electrode wire, wherein the cutting data comprises workpiece processing parameters, track planning data, tension control parameters, an upper machine head movement track and a lower machine head movement track;
Performing electrode wire movement according to the upper machine head movement track and the lower machine head movement track respectively based on the workpiece processing parameters and the tension control parameters, and measuring to obtain tension adjusting wheel change data generated when the electrode wire is in contact with a workpiece;
Obtaining a possible position curve of the contact point of the electrode wire and the workpiece in single measurement according to the change data of the tension adjusting wheel and the track planning data, and obtaining a possible position curve of the contact point according to all possible position curves of the contact point;
and intersecting the workpiece plane with the curved surface at the possible position of the contact point to obtain the edge shape of the workpiece, and carrying out data processing based on the edge shape of the workpiece to carry out machining precision compensation.
The in-situ measuring and compensating method for the edge shape of the scanning wire-cut electric discharge machine workpiece provided by the embodiment of the invention can also have the following additional technical characteristics:
In one embodiment of the invention, the method further comprises obtaining wire electrode length and upper and lower handpiece positions at a single measurement based on the tension adjustment wheel variation data and the trajectory planning data.
In one embodiment of the invention, the tension control parameter is used for controlling a tension measuring and controlling device, and the tension measuring and controlling device comprises a godet wheel, an adjusting wheel and a tension sensor, wherein the length from the E point of an electrode wire on the godet wheel to the F point of the adjusting wheel is obtained and divided into an arc EA, an arc AB and an arc BF;
taking N as a starting point, recording z=O 2 N, representing the position of the tension adjusting wheel in the Z direction, wherein Z is a variable recorded in real time in the measuring process, and establishing a mathematical model as follows:
the length of the connecting line O 1O2 of the godet wheel and the adjusting wheel is as follows:
the length of the arc AB is as follows:
The length of the arc BF is as follows:
the length of the straight line AB is:
AB=AM+BM=(r1+r2)·cotα
The length of the electrode wire between the upper machine head and the lower machine head is changed as follows:
Δl=l1-l0
＝(UD1-UD0)+(r1+r2)·[(α1+β1+cotα1)-(α0+β0+cotα0)]
Wherein, the
In one embodiment of the invention, the spatial coordinates of the preset upper and lower handpieces are (x u,yu,zu) respectively,
(X d,yd,zd), the length of the electrode wire between the upper and lower machine heads isIn the plane of the single measured contact point possible position curve, the curve is a part of an ellipse with the upper and lower machine heads U, D and w as the focus and the fixed length, wherein the ellipse major axis 2a=l w, the ellipse focal length
In one embodiment of the invention, the data processing includes a plurality of image processing, data fitting, and data alignment.
In order to achieve the above object, another aspect of the present invention provides an in-situ measuring and compensating device for edge shape of a workpiece for wire-cut electric discharge machining, comprising:
The processing data acquisition module is used for acquiring cutting data of a workpiece processed by the electrode wire, wherein the cutting data comprises workpiece processing parameters, track planning data, tension control parameters, an upper machine head movement track and a lower machine head movement track;
The change data calculation module is used for carrying out electrode wire movement according to the upper machine head movement track and the lower machine head movement track respectively based on the workpiece processing parameters and the tension control parameters, and measuring and obtaining change data of a tension adjusting wheel generated when the electrode wire is in contact with a workpiece;
the contact point position measurement module is used for obtaining a contact point possible position curve of the electrode wire and the workpiece in single measurement according to the tension adjusting wheel change data and the track planning data, and obtaining a contact point possible position curved surface according to all the contact point possible position curves;
And the machining precision compensation module is used for intersecting the workpiece plane with the curved surface at the possible position of the contact point to obtain the edge shape of the workpiece, and carrying out data processing based on the edge shape of the workpiece to carry out machining precision compensation.
The method and the device for in-situ measurement and compensation of the edge shape of the scanning wire-cut electric discharge machining work piece solve the problem that the machining efficiency and the machining precision are affected due to the fact that the measuring is taken down and the work piece is clamped again in the prior art, the work piece is not required to be taken down for measurement, in-situ measurement and subsequent error characterization and compensation correction steps can be achieved, and the efficiency and the precision of wire-cut machining are improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a flow chart of a method for in-situ measurement and compensation of edge shape of a scanned wire-cut electrical discharge machining workpiece in accordance with an embodiment of the invention;
FIG. 2 is a schematic diagram of an in situ measurement device according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a tension measurement and control device according to an embodiment of the present invention;
FIG. 4 is a schematic illustration of wire electrode elongation calculation at a tension adjustment wheel according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a single measurement touch point possible location graph according to an embodiment of the invention;
FIG. 6 is a schematic view of a curved surface of a possible contact point location according to an embodiment of the present invention;
FIG. 7 is a schematic view of the intersection of a workpiece plane with a curved surface at a possible location of a contact point to obtain a workpiece edge shape in accordance with an embodiment of the invention;
FIG. 8 is a flow chart of in-situ measurement and accuracy compensation based on iterative corrections in accordance with an embodiment of the present invention;
FIG. 9 is a flowchart of an optimized wire-cut electrical discharge machining process in accordance with an embodiment of the present invention;
Fig. 10 is a schematic structural view of an in-situ measuring and compensating device for edge shape of a scanned wire-cut electric discharge machine according to an embodiment of the present invention.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
The method and the device for in-situ measuring and compensating the edge shape of the scanning wire-cut electric discharge machine according to the embodiment of the invention are described below with reference to the accompanying drawings.
FIG. 1 is a flow chart of a method for in-situ measurement and compensation of edge shape of a scanned wire-cut electrical discharge machining workpiece in accordance with an embodiment of the invention.
As shown in fig. 1, the method includes, but is not limited to, the steps of:
s1, acquiring cutting data of a wire electrode machined workpiece, wherein the cutting data comprise workpiece machining parameters, track planning data, tension control parameters, an upper machine head movement track and a lower machine head movement track;
S2, performing electrode wire movement according to an upper machine head movement track and a lower machine head movement track based on workpiece processing parameters and tension control parameters, and measuring to obtain tension adjusting wheel change data generated when the electrode wire is in contact with a workpiece;
s3, obtaining a possible position curve of the contact point of the electrode wire and the workpiece in single measurement according to the change data of the tension adjusting wheel and the track planning data, and obtaining a possible position curve of the contact point according to all the possible position curves of the contact point;
s4, intersecting the workpiece plane with the curved surface of the possible position of the contact point to obtain the edge shape of the workpiece, and carrying out data processing based on the edge shape of the workpiece to carry out machining precision compensation.
Specifically, the method for in-situ measuring and compensating the edge shape of the scanned wire-cut electric discharge machine of the invention comprises the following implementation steps:
s101, setting processing parameters, performing track planning, and performing wire-cut electric discharge machining;
S102, planning tracks of an upper machine head and a lower machine head, setting tension and a tension adjusting wheel range, and starting constant tension control;
and S103, performing a measurement program, enabling the upper and lower machine heads to move according to the planned track, driving the electrode wire to contact with the workpiece and generate certain deflection deformation, and automatically recording the change information of the tension adjusting wheel.
And S104, according to the tension adjusting wheel data and the track planning data, the length of the electrode wire and the positions of the upper and lower machine heads during single measurement are obtained, and therefore a possible position curve of the contact point during single measurement is obtained.
S105, processing the whole measured values around the circle in the step S104 to obtain all possible position curves of the contact point, and superposing to obtain the possible position curves of the contact point.
S106, intersecting the workpiece plane with the curved surface of the possible position of the contact point to obtain a workpiece edge shape curve.
And S107, performing image processing, data fitting and data comparison and the like, and performing subsequent error characterization and compensation until the precision meets the requirements.
Fig. 2 is a schematic diagram of the apparatus of the method according to the present invention. As shown in fig. 2, the wire-cut electric discharge machine with slow wire travel adopts a unidirectional wire travel system, and a tension measuring and controlling device is improved on the basis of the wire travel system. The electrode wire passes through the upper machine head and the lower machine head from the wire storage barrel through the tension measuring and controlling device, and finally enters the recycling wire winding barrel through the tension measuring and controlling device. FIG. 3 is a schematic diagram of a tension measuring and controlling device.
Fig. 4 is a schematic illustration of the calculation of wire elongation at the tension adjustment wheel. The length from the E point to the F point of the electrode wire is required to be recorded, and the electrode wire is segmented and can be divided into three sections of an arc EA, a line AB and an arc BF.
Taking N as a starting point, recording z=O 2 N, representing the position of the tension adjusting wheel in the Z direction, wherein Z is a variable recorded in real time in the measuring process. And keeping constant wire feeding and wire collecting speeds, wherein the total length of the electrode wire between the new wire barrel and the old wire barrel is a constant value, and only when the initial state (the electrode wire between the upper and lower machine heads is free from contact and deformation with the workpiece, and the tension is kept at a set value) is measured, the position (x u0,yu0,zu0)、(xd0,yd0,zd0) of the upper and lower machine heads is recorded, and the z value at the moment is recorded as z0. The z value can reflect the length lw of the electrode wire between the upper machine head and the lower machine head during measurement. The mathematical model is built as follows:
the length of the connecting line O 1O2 of the godet wheel A and the adjusting wheel is as follows:
the length of the arc AB section is as follows:
the length of the arc BF section is as follows:
the length of the straight line section AB is as follows:
AB=AM+BM=(r1+r2)·cotα
from this, the wire length between the upper and lower heads is changed to:
Δl=l1-l0
＝(UD1-UD0)+(r1+r2)·[(α1+β1+cotα1)-(α0+β0+cotα0)]
Wherein:
in one embodiment of the present invention, in wire electric discharge machining, the upper and lower heads are moved in accordance with a predetermined trajectory while electric discharge machining is performed.
Taking cylindrical workpiece processing as an example, performing measurement track planning after wire cutting processing, enabling electrode wires between an upper machine head and a lower machine head to be in contact with the edges of the workpiece, enabling the contact point to be P, enabling the upper machine head and the lower machine head to synchronously move, enabling the electrode wires to keep continuous point contact with the workpiece in the moving process, and enabling the electrode wires between the upper machine head and the lower machine head to have certain deflection deformation until the edges of the upper surface are measured.
The change condition of the tension adjusting wheel can reflect the possible positions of contact points of the electrode wire and the edge of the workpiece, and all the possible contact points form a curved surface in space. The curve obtained by intersecting the workpiece plane and the curved surface of the contact point is the edge shape of the workpiece. And after the curve is obtained, data measurement, error characterization and precision compensation can be performed.
Fig. 5 is a schematic diagram showing a possible position curve of a contact point measured for a single time. The single change information recorded by the tension adjusting wheel is the up-and-down displacement of the tension adjusting wheel under the condition of constant control tension. The upward movement of the tensioning wheel l represents an additional elongation of the wire electrode l between the upper and lower heads. The space coordinates of the upper and lower machine heads are respectively (x u,yu,zu),(xd,yd,zd), the length of the electrode wire between the upper and lower machine heads isThus, in the plane of the curve of the possible location of the point of contact measured at a single time, the curve is a portion of an ellipse with the upper and lower hand piece U, D points as the focal points and l w as the fixed length. Wherein, ellipse major axis 2a=l w, ellipse focal length
FIG. 6 is a graph of the possible positions of the wire electrode and workpiece edge contact points obtained from the tension adjustment wheel change data after a complete revolution of the measurement. The curved surface is obtained by superposing curves of possible positions of contact points measured in a single time.
Fig. 7 shows the edge shape of the workpiece obtained by intersecting the workpiece plane with the curved surface at the possible position of the contact point. After the shape is obtained, subsequent error characterization and compensation work can be performed by image processing, data fitting, data comparison and the like.
FIG. 8 is a flow of in-situ measurement and accuracy compensation based on iterative correction. The in-situ measurement method can be used for obtaining the shape and size precision of the workpiece after being processed on the machine tool, so as to guide the compensation and correction flow until the precision meets the requirement. Fig. 9 is a flowchart of an optimized wire-cut electrical discharge machining in accordance with an embodiment of the present invention.
In summary, the invention is based on real-time measurement and adaptive constant control of the tension, so that the tension of the electrode wire can be kept constant in the measuring process. According to the principle of entering the body, a scanning track corresponding to the inside of the processing track is arranged, so that a certain pressure exists when the electrode wire is in contact with the workpiece, the pressure change is enough to be accurately recorded by the tension sensor, the tension of the electrode wire is adjusted in real time according to the pressure change, the tension of the electrode wire is kept unchanged, and the edge shape of the workpiece is reflected in the changes of the upper and lower machine head positions and the tension adjusting wheel. The electrode wire is scanned according to the scanning track, and the change condition of the tension adjusting wheel is recorded, so that the elongation of the electrode wire is obtained, and a curved surface of a possible position of a contact point can be obtained. And combining the plane of the workpiece to establish a mathematical model of the change data of the tension adjusting wheel and the edge size and shape of the workpiece, thereby obtaining the edge size and shape of the workpiece. According to the method, a workpiece is not required to be taken down for measurement, in-situ measurement and subsequent error characterization and compensation correction steps can be realized, and the efficiency and the precision of wire cutting processing are improved.
According to the scanning type wire-cut electric discharge machining workpiece edge shape in-situ measurement and compensation method, the problem that machining efficiency and machining precision are affected due to the fact that the conventional method is used for taking down measurement and re-clamping is solved, the machining flow can be shortened, the measurement time is saved through in-situ measurement and precision compensation, machining efficiency and machining precision are improved, and manpower and material resources are saved.
In order to implement the above-mentioned embodiment, as shown in fig. 10, there is also provided an apparatus 10 for in-situ measuring and compensating an edge shape of a wire cut electric discharge machine according to the present embodiment, wherein the apparatus 10 includes a machining data acquisition module 100, a change data calculation module 200, a contact point position measurement module 300, and a machining precision compensation module 400.
The processing data acquisition module 100 is used for acquiring cutting data of a workpiece processed by the electrode wire, wherein the cutting data comprises workpiece processing parameters, track planning data, tension control parameters, an upper machine head movement track and a lower machine head movement track;
the change data calculation module 200 is used for performing electrode wire movement according to the upper machine head movement track and the lower machine head movement track respectively based on the workpiece processing parameters and the tension control parameters, and measuring and obtaining tension adjustment wheel change data generated when the electrode wire is in contact with the workpiece;
The contact point position measurement module 300 is used for obtaining a contact point possible position curve of the electrode wire and the workpiece in single measurement according to the tension adjusting wheel change data and the track planning data, and obtaining a contact point possible position curved surface according to all the contact point possible position curves;
the machining precision compensation module 400 is used for intersecting the workpiece plane with the curved surface of the possible position of the contact point to obtain the workpiece edge shape, and performing data processing based on the workpiece edge shape to perform machining precision compensation.
Further, the above-mentioned contact point position measurement module 300 is further configured to obtain the wire electrode length and the upper and lower handpiece positions during a single measurement according to the tension adjustment wheel change data and the trajectory planning data.
Further, tension control parameters are used for controlling a tension measuring and controlling device, and the tension measuring and controlling device comprises a godet wheel, an adjusting wheel and a tension sensor, wherein the length from the E point of an electrode wire on the godet wheel to the F point of the adjusting wheel is obtained and divided into an arc EA, a line AB and an arc BF;
taking N as a starting point, recording z=O 2 N, representing the position of the tension adjusting wheel in the Z direction, wherein Z is a variable recorded in real time in the measuring process, and establishing a mathematical model as follows:
the length of the connecting line O 1O2 of the godet wheel and the adjusting wheel is as follows:
the length of the arc AB is as follows:
The length of the arc BF is as follows:
the length of the straight line AB is:
AB=AM+BM=(r1+r2)·cotα
The length of the electrode wire between the upper machine head and the lower machine head is changed as follows:
Δl=l1-l0
＝(UD1-UD0)+(r1+r2)·[(α1+β1+cotα1)-(α0+β0+cotα0)]
Wherein, the
Further, the space coordinates of the upper and lower machine heads are preset to be (x u,yu,zu),(xd,yd,zd), and the length of the electrode wire between the upper and lower machine heads isIn the plane of the single measured contact point possible position curve, the curve is a part of an ellipse with the upper and lower machine heads U, D and w as the focus and the fixed length, wherein the ellipse major axis 2a=l w, the ellipse focal length
Further, data processing includes a plurality of image processing, data fitting, and data alignment.
According to the scanning type wire-cut electric discharge machining workpiece edge shape in-situ measurement and compensation device, the problem that machining efficiency and machining precision are affected due to the fact that the conventional device is used for taking down measurement and re-clamping is solved, the machining flow can be shortened, the measurement time is saved through in-situ measurement and precision compensation, machining efficiency and machining precision are improved, and manpower and material resources are saved.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
Claims (4)
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| JP4327662B2 (en) * | 2004-06-10 | 2009-09-09 | 株式会社ソディック | Wire cut electric discharge machining method, method for creating machining program in wire cut electric discharge machining method, and machining program creation apparatus for wire cut electric discharge machining |
| JP5048108B2 (en) * | 2010-08-06 | 2012-10-17 | ファナック株式会社 | Wire-cut EDM with workpiece measurement function |
| CN103286398B (en) * | 2012-02-29 | 2016-04-06 | 昆山徕通机电科技有限公司 | Line electrode carries out device and the bearing calibration thereof of vertical correction with spark discharge position |
| CN108941810B (en) * | 2018-08-20 | 2023-10-20 | 苏州诚模精密科技有限公司 | Touch number device and method for wire cutting machining |
| CN210099153U (en) * | 2019-11-22 | 2020-02-21 | 长沙世茂机械有限公司 | Wire-electrode cutting spark-proof line edge finder |
| TWI786638B (en) * | 2021-05-18 | 2022-12-11 | 徠通科技股份有限公司 | The method of quick edge-detecting in wedm |
| CN115673446B (en) * | 2022-11-07 | 2025-08-19 | 清华大学 | Wire cut electric discharge machining method and device capable of automatically measuring and compensating on line |
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| CN207787892U (en) * | 2017-10-25 | 2018-08-31 | 青岛双友工贸有限公司 | A kind of wire electrode tension regulating device of novel electric spark linear cutting machine |
| CN116038045A (en) * | 2022-11-04 | 2023-05-02 | 清华大学 | A method and device for automatically generating parameters of wire electric discharge cutting |
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