201228756 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種放電點偵測系統與方法，尤指一種 能應用於線切割放電加工機之放電點偵測系統與方法。 【先前技術】 所謂的線切割放電加工製程，係利用線切割放電加工 機上的金屬線極（wire electrode)來對工作物或模具進行 切割，藉此使金屬線極如線鋸般在工作物或模具上切出所 • 需的輪廓形狀。實際進行切割作業時，線放電加工機係以 純水作為加工液，並透過上、下導電塊來使金屬線極以低 電壓、大電流的形式進行放電。 雖然線放電加工技術已經是一種相當普遍的加工技 術，但若金屬線極的放電點密度不均勻，不但容易令金屬 線極發生斷線的情形，影響加工效率，同時，加工的切割 面，也不容易達成預定的垂直切割效果，進而使得加工品 | 質無法提昇。 為了使金屬線極的放電點密度平均，金屬線極精確的 放電點位置即為其中最重要的關鍵，惟由於放電點的位置 不僅無法被預測，且無法透過光學儀器來進行觀察，所以 時至今日，金屬線極的斷線機率過高乃至影響加工效率加 工品質等問題仍舊無法有效地解決。 【發明内容】 有鑒於此，本發明之主要目的係在於提供一種量測線 切割放電加工機之放電點位置的偵測系統與方法。 111924 3 201228756 為了達到上述目的及其他目的，本發明遂提供一種線 切割放電加工機放電點偵測系統，係應用於線切割放電加 工機，包括：二電流量測模組，係用以分別量測流經該線 切割放電加工機的上、下導電塊之電流；電流比較模組， 係用以比較出該二電流量測模組所分別量測出之該上、下 導電塊之電流差額；以及處理模組，係用以依據該電流比 較模組比較出的差額推算出該線切割放電加工機之金屬線 極的放電點位置。 另外，本發明還提供一種線切割放電加工機放電點偵 測方法，係應用於線切割放電加工機，包括以下步驟：（1) 量測流經該線切割放電加工機的上、下導電塊之電流；（2) 比較出所量測出該上、下導電塊之電流差額；以及（3 )依 據該比較出的電流差額推算出該線切割放電加工機之金屬 線極的放電點位置。 因此，本發明之線切割放電加工機放電點偵測系統與 方法即可精確地偵測出線切割放電加工機即時的放電點位 置，以供使用者於線切割放電加工製程中透過線切割放電 加工機之控制電路來調整加工參數，進而使放電點分佈趨 於平均，解決斷線機率過高影響加工效率與加工品質等問 題。 【實施方式】 以下藉由特定的具體實施形態說明本發明之實施方 式，熟悉此技術之人士可由本說明書所揭示之内容輕易地 瞭解本發明之其他優點與功效。當然，本發明亦可藉由其 111924 4 201228756 他不同的具體實施形態加以施行或應用。 請一併參閱第1圖及第2圖，其分別為本發明之線切 割放電加工機放電點偵測系統架構圖及其應用配置圖。 如圖所示，線切割放電加工機放電點偵測系統1係包 括電流量測模組l〇a、電流量測模組10b、電流比較模組 11、轉換模組12、處理模組13、及通訊傳輸模組14，其 中，電流比較模組11、轉換模組12、處理模組13，及通 訊傳輸模組14可選擇性地整合設置為一放電點計算與記 • 錄電路A，而線切割放電加工機放電點偵測系統1係可應 用於具有上導電塊3、下導電塊4、及金屬線極5之線切割 放電加工機，該金屬線極5可為具有導電特性之金屬材質 所組成者，且線切割放電加工機係利用金屬線極5對工作 物2進行線切割放電加工。 電流量測模組l〇a與電流量測模組10b，係分別用以 量測出流經所述之線切割放電加工機的上導電塊3與下導 I 電塊4之電流。於本實施形態中，電流量測模組10a與電 流量測模組l〇b係可利用電磁感應原理分別量測出流經線 切割放電加工機的上導電塊3與下導電塊4之電流，而實 際操作時，電流量測模組l〇a與電流量測模組10b更可設 計為具有中空區域之結構，且分別令上導電塊3之電纜線 30與下導電塊4之電纜線40分別從所述之電流量測模組 10a與電流量測模組10b之中空區域中穿過。 電流比較模組11係用以比較出電流量測模組l〇a與電 流量測模組l〇b分別量測出之電流的差額。 111924 5 201228756 轉換模組12係用以將電流比較模組11比較出的差額 從類比訊號的形式轉換為數位訊號的形式。 處理模組13係用以接收轉換模組12所轉換之數位訊 號，並依據數位訊號中包含之電流差額推算出放電點位 置。於本實施形態中，處理模組13可利用電橋定律來進行 推算，亦即先由電流差額計算出上導電塊3與下導電塊4 之電阻值，進而再藉由上導電塊3與下導電塊4之電阻值 推算出放電點位置。其次，處理模組13還可針對推算出的 放電點位置進行記錄，如記錄於内建之記憶體（未圖示） 中。 通訊傳輸模組14係用以將處理模組13推算出的放電 點位置傳送至外部的控制裝置，並供該外部的控制裝置對 該處理模組13進行控制。具體言之，通訊傳輸模組14係 可為無線或有線之輸出/輸入連接埠，並連接至所述之線切 割放電加工機之控制裝置，而線切割放電加工機之控制裝 置在接收到處理模組13推算出的放電點位置時，除了可透 過通訊傳輸模組14對處理模組13進行回授控制外，也可 據此調整線切割放電加工製程的加工參數，以令金屬線極 5上的放電點趨於平均分佈，進而避免習知技術中因放電 點不平均而生的種種問題。 值得一提的是，在不同的需求考量下通訊傳輸模組14 可不予以設置，此時，處理模組13可直接依據電流比較模 組11比較出的差額以電橋定律推算出放電點位置，當然， 處理模組13仍可將推算出的放電點位置記錄於記憶體中。 6 111924 201228756 請再併同第2圖來參閱第3圖所繪製之步驟圖，以清 楚瞭解本發明應用於線切割放電加工機之線切割放電加工 機放電點偵測方法。 於步驟S31中，分別量測出流經線切割放電加工機的 上、下導電塊之電流，當然，分別從線切割放電加工機的 上、下導電塊量測出流經其中的電流係可藉由電磁感應原 理來予以實施，接著進至步驟S32。 於步驟S32中，比較出於步驟S31中所分別量測出之 • 流經上、下導電塊之電流的差額，接著進至步驟S33。 於步驟S33中，係依據步驟S32中所比較出的電流差 額推算出放電點位置，具體來說，係可藉由電橋定律來推 算出放電點位置，亦即，先由比較出的差額計算出該上、 下導電塊之電阻值，進而再藉由該上、下導電塊之電阻值 推算出該放電點位置。 於本實施形態中，於步驟S32中復可包括將比較出的 差額轉換為數位訊號之步驟，此時，所述之步驟S33則依 據已轉換為數位訊號之差額來進行放電點位置的推算作 業。 於本實施形態中，於步驟S33後，還可包括將推算出 的放電點位置傳送至外部的控制裝置之步驟，接著，復可 包括令該控制裝置回授控制該線切割放電加工機之金屬線 極的該放電點位置。再者，於步驟S33後，還可包括對推 算出之放電點位置進行記錄之步驟。 綜上所述，由於本發明之線切割放電加工機放電點偵 111924 7 201228756 測系統與方法可偵測出線切割放電加工機的放電點位置， 所以於線切割放電加工製程中，使用者可透過線切割放電 加工機之控制電路即時地調整加工參數，進而使放電點分 佈趨於平均，藉此有效地解決斷線機率過高影響加工效率 與加工品質等問題。 上述實施形態僅例示性說明本發明之原理及其功 效，而非用於限制本發明。任何熟習此項技藝之人士均可 在不違背本發明之精神及範疇下，對上述實施形態進行修 飾與改變。因此，本發明之權利保護範圍，應如後述之申 請專利範圍所列。 【圖式簡單說明】 第1圖係為本發明之線切割放電加工機放電點偵測系 統之系統架構圖； 第2圖係為第1圖所示之線切割放電加工機放電點偵 測系統之應用配置圖；以及 第3圖係為本發明之線切割放電加工機放電點偵測方 法之流程圖。 【主要元件符號說明】 I 線切割放電加工機放電點偵測系統 10a、1 Ob電流量測模組 II 電流比較模組 12 轉換模組 13 處理模組 14 通訊傳輸模組 8 111924 201228756 2 工作物 3 上導電塊 30 電纜線 4 下導電塊 40 電纜線 5 金屬線極 A 放電點計算與記錄電路 S31〜S33 步驟201228756 VI. Description of the Invention: [Technical Field] The present invention relates to a discharge point detecting system and method, and more particularly to a discharge point detecting system and method which can be applied to a wire cutting electrical discharge machine. [Prior Art] The so-called wire-cut electrical discharge machining process uses a wire electrode on a wire-cut electrical discharge machine to cut a workpiece or a mold, thereby making the wire extremely like a wire saw. Or cut out the desired contour shape on the mold. In the actual cutting operation, the wire electric discharge machine uses pure water as the working fluid, and discharges the metal wire poles in the form of low voltage and large current through the upper and lower conductive blocks. Although the wire discharge machining technology is already a fairly common processing technology, if the density of the discharge point of the metal wire is not uniform, it is not only easy to cause the wire to be broken, which affects the processing efficiency, and at the same time, the processed cutting surface is also It is not easy to achieve a predetermined vertical cutting effect, and thus the quality of the processed product cannot be improved. In order to average the discharge point density of the metal line pole, the extremely accurate discharge point position of the metal line is the most important key, but since the position of the discharge point cannot be predicted, and cannot be observed through the optical instrument, it is time to Today, the problem of excessive wire breakage rate and even affecting processing efficiency and processing quality can still not be effectively solved. SUMMARY OF THE INVENTION In view of the above, it is a primary object of the present invention to provide a detection system and method for measuring the position of a discharge point of an electric discharge machine. 111924 3 201228756 In order to achieve the above and other objects, the present invention provides a wire-cut electrical discharge machine discharge point detecting system for use in a wire-cut electrical discharge machine, comprising: a two-current measuring module for separately measuring Measuring current flowing through the upper and lower conductive blocks of the electric discharge machine; the current comparison module is configured to compare the current difference between the upper and lower conductive blocks respectively measured by the two current measurement modules And the processing module is configured to calculate a discharge point position of the wire electrode of the wire-cut electrical discharge machine according to the difference calculated by the current comparison module. In addition, the present invention also provides a wire-cut electric discharge machine discharge point detecting method, which is applied to a wire-cut electric discharge machine, and includes the following steps: (1) measuring the upper and lower conductive blocks flowing through the wire-cut electric discharge machine (2) comparing the measured current difference between the upper and lower conductive blocks; and (3) deriving the discharge point position of the wire electrode of the wire-cut electrical discharge machine according to the compared current difference. Therefore, the wire point electric discharge machine discharge point detecting system and method of the present invention can accurately detect the instantaneous discharge point position of the wire cutting electric discharge machine for the user to pass the wire cutting discharge in the wire cutting electric discharge machining process. The control circuit of the processing machine adjusts the processing parameters, so that the distribution of the discharge point tends to be average, and the problem that the high probability of disconnection affects the processing efficiency and the processing quality is solved. [Embodiment] Hereinafter, the embodiments of the present invention will be described by way of specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present invention from the disclosure of the present specification. Of course, the invention can also be implemented or applied by its different embodiments in its 111924 4 201228756. Please refer to FIG. 1 and FIG. 2 together, which are respectively an architecture diagram of a discharge point detecting system of the wire cutting electric discharge machine of the present invention and an application configuration diagram thereof. As shown in the figure, the wire-cut electric discharge machine discharge point detecting system 1 includes a current measuring module 10a, a current measuring module 10b, a current comparing module 11, a conversion module 12, a processing module 13, And the communication transmission module 14, wherein the current comparison module 11, the conversion module 12, the processing module 13, and the communication transmission module 14 are selectively integrated into a discharge point calculation and recording circuit A, and The wire-cut electric discharge machine discharge point detecting system 1 can be applied to a wire-cut electric discharge machine having an upper conductive block 3, a lower conductive block 4, and a metal wire pole 5, and the metal wire pole 5 can be a metal having conductive characteristics. The wire-cut electric discharge machine performs the wire-cut electric discharge machining on the workpiece 2 by the wire-cut electric discharge machine. The current measuring module 10a and the current measuring module 10b are respectively configured to measure the current flowing through the upper conductive block 3 and the lower conductive block 4 of the wire-cut electric discharge machine. In this embodiment, the current measuring module 10a and the current measuring module 10b can measure the current flowing through the upper conductive block 3 and the lower conductive block 4 of the wire-cut electric discharge machine by using the electromagnetic induction principle. In actual operation, the current measuring module 10a and the current measuring module 10b can be designed to have a hollow area structure, and respectively make the cable line 30 of the upper conductive block 3 and the lower conductive block 4 cable. 40 passes through the hollow region of the current measuring module 10a and the current measuring module 10b, respectively. The current comparison module 11 is configured to compare the difference between the current measured by the current measurement module 10a and the current measurement module 10b. 111924 5 201228756 The conversion module 12 is configured to convert the difference between the current comparison module 11 from the analog signal form to the digital signal form. The processing module 13 is configured to receive the digital signal converted by the conversion module 12, and derive a discharge point position according to the current difference included in the digital signal. In this embodiment, the processing module 13 can perform the estimation by using the bridge law, that is, the resistance values of the upper conductive block 3 and the lower conductive block 4 are first calculated from the current difference, and then by the upper conductive block 3 and the lower The resistance value of the conductive block 4 is derived from the position of the discharge point. Next, the processing module 13 can also record the calculated position of the discharge point, such as in a built-in memory (not shown). The communication transmission module 14 is configured to transmit the position of the discharge point calculated by the processing module 13 to an external control device, and the external control device controls the processing module 13. Specifically, the communication transmission module 14 can be a wireless or wired output/input port and connected to the control device of the wire-cut electrical discharge machine, and the control device of the wire-cut electrical discharge machine receives the processing. When the position of the discharge point is calculated by the module 13, in addition to the feedback control of the processing module 13 through the communication transmission module 14, the processing parameters of the wire-cut electrical discharge machining process can be adjusted accordingly to make the metal wire 5 The discharge points on the upper side tend to be evenly distributed, thereby avoiding various problems in the prior art due to uneven discharge points. It is worth mentioning that the communication transmission module 14 may not be set under different requirements. At this time, the processing module 13 may directly calculate the position of the discharge point according to the bridge law according to the difference calculated by the current comparison module 11. Of course, the processing module 13 can still record the estimated discharge point position in the memory. 6 111924 201228756 Please refer to Figure 2 for the step diagram drawn in Figure 3 to clearly understand the method of detecting the discharge point of the wire-cut EDM machine used in the wire-cut EDM. In step S31, the currents flowing through the upper and lower conductive blocks of the wire-cut electric discharge machine are respectively measured. Of course, the current flowing through the upper and lower conductive blocks of the wire-cut electric discharge machine respectively can be measured. This is carried out by the principle of electromagnetic induction, and then proceeds to step S32. In step S32, the difference between the currents flowing through the upper and lower conductive blocks measured in step S31 is compared, and the flow proceeds to step S33. In step S33, the position of the discharge point is estimated according to the current difference compared in step S32. Specifically, the position of the discharge point can be calculated by the bridge law, that is, the difference is calculated first. The resistance values of the upper and lower conductive blocks are extracted, and the position of the discharge point is further calculated by the resistance values of the upper and lower conductive blocks. In this embodiment, the step of converting the compared difference into a digital signal is performed in step S32. At this time, the step S33 performs the estimation of the discharge point position according to the difference converted into the digital signal. . In this embodiment, after step S33, the step of transmitting the estimated discharge point position to the external control device may be further included, and then the re-commissioning includes returning the control device to control the metal of the wire-cut electrical discharge machine. The position of the discharge point of the line pole. Furthermore, after step S33, the step of recording the estimated discharge point position may be included. In summary, since the wire-cut electric discharge machine discharge point detection 111924 7 201228756 measuring system and method can detect the discharge point position of the wire-cut electric discharge machine, in the wire-cut electric discharge machining process, the user can The control circuit of the wire-cut EDM machine adjusts the processing parameters in real time, so that the distribution of the discharge points tends to be averaged, thereby effectively solving the problems of high processing probability and processing quality caused by the high probability of disconnection. The above embodiments are merely illustrative of the principles and advantages of the invention and are not intended to limit the invention. Any of the above-described embodiments may be modified and altered without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention should be as set forth in the scope of the claims described later. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a system architecture diagram of a discharge point detecting system for a wire-cut electric discharge machine of the present invention; FIG. 2 is a discharge point detecting system for a wire-cut electric discharge machine shown in FIG. The application configuration diagram; and the third diagram is a flowchart of the method for detecting the discharge point of the wire-cut electrical discharge machine of the present invention. [Main component symbol description] I wire cutting EDM discharge point detection system 10a, 1 Ob current measurement module II Current comparison module 12 Conversion module 13 Processing module 14 Communication transmission module 8 111924 201228756 2 Work 3 Upper conductive block 30 Cable line 4 Lower conductive block 40 Cable line 5 Metal line pole A Discharge point calculation and recording circuit S31~S33 Step
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