TWM505992U

TWM505992U - Electrical discharge machine reducing structure error

Info

Publication number: TWM505992U
Application number: TW103222951U
Authority: TW
Inventors: rui-cheng Zhang; Min-Rui Lai
Original assignee: Excetek Technologies Co Ltd
Priority date: 2014-12-25
Filing date: 2014-12-25
Publication date: 2015-08-01

Description

降低結構誤差的放電加工機EDM machine with reduced structural error

本新型是有關於一種放電加工機，特別是指一種能降低結構誤差的放電加工機。The present invention relates to an electric discharge machine, and more particularly to an electric discharge machine capable of reducing structural errors.

現有的線切割放電加工機包含一機床、安裝於該機床的一工作台與一立柱，及一線電極引導裝置。該工作台包括一供一工件放置的加工基準面。該線電極引導裝置包括一裝設於該立柱的上機頭，及一低於該加工基準面的下機頭，並由該上、下機頭牽拉一線電極以對該工件進行放電加工。A conventional wire electric discharge machine includes a machine tool, a table and a column mounted on the machine tool, and a wire electrode guiding device. The workbench includes a processing datum for placement of a workpiece. The wire electrode guiding device comprises an upper head mounted on the column, and a lower head lower than the machining reference surface, and the upper and lower heads pull a wire electrode to perform electrical discharge machining on the workpiece.

值得探討的是，線切割放電加工機的加工誤差大部分來自於結構誤差，而產生結構誤差的原因概可分為以下兩種：It is worth exploring that most of the machining errors of wire-cut EDMs come from structural errors, and the causes of structural errors can be divided into the following two types:

一、組件在組裝時的對應偏差：線切割放電加工是藉由該線電極與該工件的相對運動以進行切割作業，所以對該線電極與該工件之間的定位精度有影響的組件，如驅動元件、運動引導元件，及量測元件等，在組裝到該線切割放電加工機上時，為了降低組裝偏差所造成的誤差，所以需要精準地對應組配，以求得確切的相對運動。因此，供該工件放置的加工基準面，及該機床上供該立柱可位移地安裝的運動基準面，兩者的高度關係至為重要，如中華民國發明專利公告第389713號所揭示一種線切割放電加工機，其加工基準面常高於其運動基準面200mm以上，使該等定位相關組件在校準該加工基準面與該運動基準面時，容易發生組裝對應偏差，而產生了亞貝誤差(Abbe Error)，並且亞貝誤差正比於該加工基準面與該運動基準面的高度差，其誤差值影響加工精度的程度不容忽視。First, the corresponding deviation of the assembly during assembly: wire-cut electrical discharge machining is the cutting operation by the relative movement of the wire electrode and the workpiece, so the component that affects the positioning accuracy between the wire electrode and the workpiece, such as When assembling the drive element, the motion guiding element, and the measuring element, etc., in order to reduce the error caused by the assembly deviation when assembling to the wire-cut electrical discharge machine, it is necessary to accurately match the combination to obtain the exact relative motion. Therefore, the height of the machining reference plane for the workpiece placement and the motion reference surface for the displacement of the column on the machine tool are important, as described in the Chinese Patent Publication No. 389713. In the EDM machine, the machining reference plane is often higher than the motion reference plane by more than 200 mm, so that the positioning-related components are prone to assembly deviation when calibrating the machining reference plane and the motion reference plane, and the Abbe error occurs. Abbe Error), and the Abbe error is proportional to the height difference between the machining reference plane and the motion reference plane, and the degree of error value affecting the machining accuracy cannot be ignored.

二、結構變形：由於該上機頭懸垂凸伸於該立柱，所以該上機頭的重量會對該立柱產生一使該立柱彎曲變形或傾斜的彎矩，使得該立柱上的線電極相對於該加工基準面的法線產生一偏轉角。該偏轉角會使該線電極在對該工件進行加工時產生一位移誤差，而且該位移誤差正比於該加工基準面與該運動基準面的高度差，所以，對於習知的加工機，該位移誤差足以影響加工精度。2. Structural deformation: Since the upper head protrudes and protrudes from the column, the weight of the upper head will generate a bending moment for the column to bend or tilt the column, so that the line electrode on the column is opposite to the line The normal to the machining plane produces a deflection angle. The deflection angle causes the line electrode to generate a displacement error when the workpiece is processed, and the displacement error is proportional to the height difference between the machining reference plane and the motion reference plane. Therefore, for a conventional processing machine, the displacement The error is enough to affect the machining accuracy.

因此，本新型之目的，即在提供一種能降低結構誤差的放電加工機。Therefore, the object of the present invention is to provide an electric discharge machine capable of reducing structural errors.

於是，本新型降低結構誤差的放電加工機，包含一機床、一工作台，及一加工裝置。Therefore, the electric discharge machine of the present invention which reduces the structural error comprises a machine tool, a work table, and a processing device.

該機床包括一前床部，及一具有一運動基準面的後床部。該運動基準面高於該前床部的頂面。The machine tool includes a front bed portion and a rear bed portion having a motion reference surface. The motion reference plane is higher than the top surface of the front bed portion.

該工作台能沿一第一方向位移地安裝於該前床部。該工作台包括一加工基準面。該加工基準面與該運動基準面的高度差不大於50mm。The table can be movably mounted to the front bed portion in a first direction. The workbench includes a processing datum. The machining datum and the movement The height difference of the reference surface is not more than 50mm.

該加工裝置包括沿一垂直於該第一方向的第二方向安裝於該運動基準面的線性引導器、一承載於該線性引導器上方的立柱，及一連接於該立柱的機頭。The processing device includes a linear guide mounted to the motion reference surface in a second direction perpendicular to the first direction, a post supported above the linear guide, and a handpiece coupled to the post.

本新型之功效在於：該加工基準面與該運動基準面的高度差不大於50mm，有效降低包含亞貝誤差及變形誤差的結構誤差。The effect of the novel is that the height difference between the machining reference plane and the motion reference plane is not more than 50 mm, and the structural error including the Abbe error and the deformation error is effectively reduced.

1‧‧‧機床1‧‧‧ machine tools

11‧‧‧前床部11‧‧‧ Front bed

12‧‧‧後床部12‧‧‧Back bed

121‧‧‧下鑄件121‧‧‧ castings

122‧‧‧上鑄件122‧‧‧Upper casting

123‧‧‧運動基準面123‧‧‧ sports datum

2‧‧‧工作台2‧‧‧Workbench

21‧‧‧加工基準面21‧‧‧Machining datum

3‧‧‧加工裝置3‧‧‧Processing device

31‧‧‧線性引導器31‧‧‧Linear guide

311‧‧‧軌道311‧‧‧ Track

312‧‧‧滑塊312‧‧‧ Slider

32‧‧‧立柱32‧‧‧ column

33‧‧‧機頭33‧‧‧ nose

4‧‧‧量測裝置4‧‧‧Measurement device

41‧‧‧光學尺41‧‧‧ optical ruler

42‧‧‧感應器42‧‧‧ sensor

5‧‧‧第一驅動裝置5‧‧‧First drive

51‧‧‧第一動力源51‧‧‧First power source

52‧‧‧第一螺桿52‧‧‧First screw

6‧‧‧第二驅動裝置6‧‧‧Second drive

61‧‧‧第二動力源61‧‧‧second power source

62‧‧‧第二螺桿62‧‧‧Second screw

L1‧‧‧第一方向L1‧‧‧ first direction

L2‧‧‧第二方向L2‧‧‧ second direction

H‧‧‧高度差H‧‧‧ height difference

本新型之其他的特徵及功效，將於參照圖式的實施方式中清楚地呈現，其中：圖1是一上視圖，說明本新型降低結構誤差的放電加工機的一實施例；圖2是一側視圖，說明該實施例；及圖3是一局部前視圖，說明該實施例。Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a top view showing an embodiment of the electric discharge machine of the present invention for reducing structural errors; The side view illustrates the embodiment; and Fig. 3 is a partial front view illustrating the embodiment.

參閱圖1、圖2與圖3，本新型降低結構誤差的放電加工機包含一機床1、一工作台2、一加工裝置3、一量測裝置4、一第一驅動裝置5，及一第二驅動裝置6。Referring to FIG. 1 , FIG. 2 and FIG. 3 , the electric discharge machine for reducing structural error of the present invention comprises a machine tool 1 , a work table 2 , a processing device 3 , a measuring device 4 , a first driving device 5 , and a first Two drive devices 6.

參閱圖1與圖2，該機床1包括一前床部11及一後床部12，該後床部12具有一連接該前床部11的下鑄件121、一固設於該下鑄件121上方的上鑄件122，及一形成於該上鑄件122的頂面的運動基準面123。該運動基準面123高於該前床部11的頂面。在本實施例中，該下鑄件121 沿一第一方向L1上的寬度大於該上鑄件122沿該第一方向L1上的寬度。Referring to FIG. 1 and FIG. 2, the machine tool 1 includes a front bed portion 11 and a rear bed portion 12. The rear bed portion 12 has a lower casting member 121 connected to the front bed portion 11, and a fixed upper portion 121. The upper casting 122 and a moving reference surface 123 formed on the top surface of the upper casting 122. The motion reference surface 123 is higher than the top surface of the front bed portion 11. In the embodiment, the lower casting 121 The width along a first direction L1 is greater than the width of the upper casting 122 along the first direction L1.

參閱圖1與圖3，該工作台2能沿該第一方向L1位移地安裝於該前床部11，且包括一加工基準面21。該加工基準面21與該運動基準面123的高度差H不大於50mm。在本實施例中，該運動基準面123的高度不低於該加工基準面21的高度。Referring to Figures 1 and 3, the table 2 is movably mounted to the front bed portion 11 in the first direction L1 and includes a machining reference surface 21. The height difference H between the machining reference surface 21 and the motion reference surface 123 is not more than 50 mm. In the present embodiment, the height of the motion reference surface 123 is not lower than the height of the processing reference surface 21.

參閱圖1與圖3，該加工裝置3包括沿一垂直於該第一方向L1的第二方向L2安裝於該運動基準面123的線性引導器31、一承載於該線性引導器31上方的立柱32，及一連接於該立柱32的機頭33。在本實施例中，該線性引導器31為一對線性滑軌，該等線性滑軌分別具有一安裝於該運動基準面123，且平行該第二方向L2的軌道311，及二能沿該第二方向L2位移地安裝於該軌道311的滑塊312。該立柱32裝設於該等滑塊312上方。Referring to FIGS. 1 and 3, the processing device 3 includes a linear guide 31 mounted on the motion reference surface 123 in a second direction L2 perpendicular to the first direction L1, and a column carried above the linear guide 31. 32, and a handpiece 33 connected to the column 32. In this embodiment, the linear guide 31 is a pair of linear slide rails respectively having a track 311 mounted on the motion reference surface 123 and parallel to the second direction L2, and The second direction L2 is displaced to the slider 312 of the rail 311. The column 32 is mounted above the sliders 312.

參閱圖1與圖3，該量測裝置4用以測量該立柱32沿該第二方向L2的位移，且包括一裝設於該上鑄件122的光學尺41，及一裝設於該立柱32並配合該光學尺41進行量測的感應器42。在本實施例中，該光學尺41的頂面與該運動基準面123實質上高度相等。Referring to FIG. 1 and FIG. 3 , the measuring device 4 is configured to measure the displacement of the column 32 along the second direction L2 , and includes an optical scale 41 mounted on the upper casting member 122 , and a mounting on the column 32 . The sensor 42 is measured in conjunction with the optical scale 41. In the present embodiment, the top surface of the optical scale 41 is substantially equal in height to the motion reference surface 123.

參閱圖1與圖2，該第一驅動裝置5用以使該工作台2沿該第一方向L1位移，且包括一裝設於該前床部11的第一動力源51，及一受該第一動力源51驅動且能帶動該工作台2的第一螺桿52。該第二驅動裝置6用以使該立柱 32連同該機頭33沿該第二方向L2位移，且包括一裝設於該後床部12的第二動力源61，及一受該第二動力源61驅動且能帶動該立柱32的第二螺桿62。在本實施例中，該第一動力源51與該第二動力源61均為馬達。Referring to FIG. 1 and FIG. 2, the first driving device 5 is configured to displace the table 2 along the first direction L1, and includes a first power source 51 mounted on the front bed portion 11, and The first power source 51 drives and can drive the first screw 52 of the table 2. The second driving device 6 is used to make the column 32 along with the head 33 being displaced along the second direction L2, and including a second power source 61 mounted on the rear bed portion 12, and a second driven by the second power source 61 and capable of driving the column 32 Two screws 62. In this embodiment, the first power source 51 and the second power source 61 are both motors.

藉此，相較於習知的放電加工機，本新型的加工基準面21與運動基準面123之間的高度差H不大於50mm，較佳地，該運動基準面123的高度不低於該加工基準面21的高度，不僅能有效提高校正精度與效率，而且能更精準地將該等軌道311與該光學尺41對準該第二方向L2，並安裝於該運動基準面123，有效降低亞貝誤差。另外，而且該運動基準面123不低於該加工基準面21，使得該立柱32的高度縮短，不僅能減少該機頭33對該立柱32產生的彎矩，而且該立柱32的結構剛性也會相對提高，使得該立柱32的彎曲變形量減少或傾斜程度下降，讓該線電極(圖未示)能實質上垂直於該加工基準面21，減少由結構變形產生的位移誤差。Therefore, compared with the conventional electric discharge machine, the height difference H between the machining reference surface 21 and the motion reference surface 123 of the present invention is not more than 50 mm. Preferably, the height of the motion reference surface 123 is not lower than the height. The height of the machining reference surface 21 can not only effectively improve the correction accuracy and efficiency, but also more accurately align the rails 311 with the optical scale 41 in the second direction L2, and mount them on the motion reference surface 123, thereby effectively reducing Abbe error. In addition, the motion reference surface 123 is not lower than the processing reference surface 21, so that the height of the column 32 is shortened, not only the bending moment generated by the head 33 on the column 32 but also the structural rigidity of the column 32 is also reduced. The relative increase causes the amount of bending deformation of the column 32 to decrease or the degree of inclination to decrease, so that the wire electrode (not shown) can be substantially perpendicular to the machining reference surface 21, reducing the displacement error caused by the structural deformation.

綜上所述，本新型藉由降低高度差H，不僅能提升加工機對於該加工基準面21與運動基準面123的校正精度與效率，更能有效降低亞貝誤差。此外，該立柱32的高度縮短，使該立柱32不易產生彎曲變形或傾斜，減少由結構變形產生的位移誤差，故確實能達成本新型之目的。In summary, the present invention can not only improve the accuracy and efficiency of the machining machine for the machining reference surface 21 and the motion reference surface 123 by reducing the height difference H, but also effectively reduce the Abbe error. In addition, the height of the column 32 is shortened, so that the column 32 is less likely to be bent or tilted, and the displacement error caused by the structural deformation is reduced, so that the object of the present invention can be achieved.

惟以上所述者，僅為本新型之較佳實施例而已，當不能以此限定本新型實施之範圍，即大凡依本新型申請專利範圍及專利說明書內容所作之簡單的等效變化與修飾，皆仍屬本新型專利涵蓋之範圍內。However, the above is only the preferred embodiment of the present invention, and the scope of the present invention cannot be limited thereto, that is, the simple equivalent change of the patent application scope and the patent specification content of the present invention is Modifications are still within the scope of this new patent.

1‧‧‧機床1‧‧‧ machine tools

11‧‧‧前床部11‧‧‧ Front bed

12‧‧‧後床部12‧‧‧Back bed

121‧‧‧下鑄件121‧‧‧ castings

122‧‧‧上鑄件122‧‧‧Upper casting

123‧‧‧運動基準面123‧‧‧ sports datum

2‧‧‧工作台2‧‧‧Workbench

21‧‧‧加工基準面21‧‧‧Machining datum

3‧‧‧加工裝置3‧‧‧Processing device

311‧‧‧軌道311‧‧‧ Track

32‧‧‧立柱32‧‧‧ column

33‧‧‧機頭33‧‧‧ nose

L1‧‧‧第一方向L1‧‧‧ first direction

L2‧‧‧第二方向L2‧‧‧ second direction

Claims

一種降低結構誤差的放電加工機，包含：一機床，包括一前床部，及一具有一運動基準面的後床部，該運動基準面高於該前床部的頂面；一工作台，能沿一第一方向位移地安裝於該前床部，該工作台包括一加工基準面，該加工基準面與該運動基準面的高度差不大於50mm；及一加工裝置，包括沿一垂直於該第一方向的第二方向安裝於該運動基準面的線性引導器、一承載於該線性引導器上方的立柱，及一連接於該立柱的機頭。An electric discharge machine for reducing structural errors, comprising: a machine tool comprising a front bed portion, and a rear bed portion having a motion reference surface, the motion reference surface being higher than a top surface of the front bed portion; a workbench, The front bed portion is movably mounted in a first direction, the work table includes a machining reference surface, the height difference between the machining reference surface and the motion reference surface is not more than 50 mm; and a processing device includes a vertical The second direction of the first direction is mounted on the linear guide of the motion reference surface, a column carried above the linear guide, and a handpiece connected to the column.

如請求項1所述的降低結構誤差的放電加工機，其中，該運動基準面的高度不低於該加工基準面的高度。An electric discharge machine for reducing structural errors according to claim 1, wherein the height of the motion reference surface is not lower than the height of the machining reference surface.

如請求項1或請求項2所述的降低結構誤差的放電加工機，其中，該後床部還具有一連接該前床部的下鑄件，及一固設於該下鑄件上方的上鑄件，該運動基準面形成於該上鑄件的頂面，該下鑄件沿該第一方向上的寬度大於該上鑄件沿該第一方向上的寬度。An electric discharge machine for reducing structural errors according to claim 1 or claim 2, wherein the rear bed portion further has a lower casting member connected to the front bed portion, and an upper casting member fixed above the lower casting member, The moving reference surface is formed on a top surface of the upper casting, and a width of the lower casting along the first direction is greater than a width of the upper casting along the first direction.

如請求項3所述的降低結構誤差的放電加工機，其中，該線性引導器為一對線性滑軌。An electric discharge machine for reducing structural errors as claimed in claim 3, wherein the linear guide is a pair of linear slides.

如請求項4所述的降低結構誤差的放電加工機，其中，該等線性滑軌分別具有一安裝於該運動基準面，且平行該第二方向的軌道，及至少一能沿該第二方向位移地安裝於該軌道的滑塊，該立柱裝設於該等滑塊上方。The electric discharge machine for reducing structural errors according to claim 4, wherein the linear slide rails respectively have a track mounted on the motion reference plane and parallel to the second direction, and at least one along the second direction A slider that is movably mounted to the track, the column being mounted above the sliders.

如請求項5所述的降低結構誤差的放電加工機，還包含一用以測量該立柱沿該第二方向位移的量測裝置。An electric discharge machine for reducing structural errors as described in claim 5, further comprising A measuring device for measuring displacement of the column in the second direction.

如請求項6所述的降低結構誤差的放電加工機，其中，該量測裝置包括一裝設於該上鑄件的光學尺，及一裝設於該立柱並配合該光學尺進行量測的感應器，該光學尺的頂面與該運動基準面實質上高度相等。An electric discharge machine for reducing structural errors according to claim 6, wherein the measuring device comprises an optical scale mounted on the upper casting, and an induction mounted on the column and measuring with the optical ruler The top surface of the optical scale is substantially equal in height to the motion reference plane.

如請求項1所述的降低結構誤差的放電加工機，還包含一第一驅動裝置及一第二驅動裝置，該第一驅動裝置用以使該工作台沿該第一方向位移，該第二驅動裝置用以使該立柱連同該機頭沿該第二方向位移。An electric discharge machine for reducing structural errors according to claim 1, further comprising a first driving device and a second driving device, wherein the first driving device is configured to displace the table in the first direction, the second The driving device is configured to displace the column along the nose in the second direction.

如請求項8所述的降低結構誤差的放電加工機，其中，該第一驅動裝置包括一裝設於該前床部的第一動力源，及一受該第一動力源驅動且能帶動該工作台的第一螺桿，該第二驅動裝置包括一裝設於該後床部的第二動力源，及一受該第二動力源驅動且能帶動該立柱的第二螺桿。An electric discharge machine for reducing structural errors according to claim 8, wherein the first driving device includes a first power source mounted on the front bed portion, and is driven by the first power source and can drive the a first screw of the table, the second driving device comprises a second power source mounted on the rear bed portion, and a second screw driven by the second power source and capable of driving the column.

如請求項9所述的降低結構誤差的放電加工機，其中，該第一動力源與該第二動力源均為馬達。An electric discharge machine for reducing structural errors according to claim 9, wherein the first power source and the second power source are both motors.