A direct-drive rotating wire rack for micro-EDM wire cutting

Abstract

In an embodiment of the present application, a direct-drive rotating wire rack for fine electric spark wire cutting is provided, which cooperates with a control device, and a tension sensing assembly, a wire storage assembly, a wire collection assembly and a guide wheel assembly for controlling the rotation of the fine electrode wire respectively electrically connected to the control device; the wire storage assembly is provided on one side of the guide wheel assembly, and the wire collection assembly is provided on the other side of the guide wheel assembly; the tension sensing assembly is arranged on the side of the wire storage assembly away from the guide wheel assembly; the guide wheel assembly includes a direct-drive motor, a guide wheel column, a guide wheel and a reversing guide wheel for converting the fine electrode wire to a preset angle; the direct-drive motor is connected to the guide wheel through the guide wheel column, and the reversing guide wheel is arranged on both sides of the guide wheel column. Rotating the guide wheel column can achieve positive and negative 90-degree rotation, expanding the flexibility and working space of fine electric spark wire cutting. The fine electrode wire tensioning device of the present application based on the sliding friction of the inner wall of the wire storage barrel makes the tensioning mechanism more compact.

Description

Technical Field

[0001] The invention relates to the field of micro-electrode wire cutting processing, in particular to a micro-electric spark wire cutting direct-drive rotating wire rack. Background Art

[0002] Micro-EDM is a method that uses the principle of discharge erosion to create micro-straight-grained parts or structures. Harbin Institute of Technology and Shanghai Jiaotong University have conducted extensive research on this technology. However, conventional micro-EDM requires a relatively complex wire transport mechanism and a micro-electrode wire tensioning device, which is less flexible. The UV axis structure used can only achieve a small swing of the micro-electrode wire, and it is also difficult to design modularly. Micro-fine electrode wire cutting is a non-contact processing with high flexibility and the advantages of not being limited by the hardness and strength of the material. Rough, medium and fine processing can be achieved by adjusting the discharge parameters.

[0003] Wang Zhenlong, Wang Yukui, Di Shichun and others from Harbin Institute of Technology took the lead in conducting research on micro-EDM. This method uses a reciprocating wire structure to achieve the recycling of micro-fine electrode wires. Huang Ruining and others from Harbin Institute of Technology use dual motors to control the unidirectional wire tension of micro-fine electrode wires. Wang Yukui and others from Harbin Institute of Technology proposed an EDM wire cutting device for micro-rotating structure processing, which realizes rotary cutting by clamping the workpiece on the rotating axis. Wang Haibing and others proposed a nine-axis eight-linkage medium-wire EDM wire cutting device, which realizes the swing of the wire rack by adding multiple linear axes, but the swing range is still limited. Chu Xuyang and others from Xiamen University proposed a micro-EDM wire cutting device based on electrospinning to generate micro-electrode wires. Zhao Wansheng from Shanghai Jiaotong University proposed the idea of ​​micro-EDM wire cutting with horizontal wire feeding. Li Zhonghua proposed a wire cutting cross guide wheel with a large slope that can be raised and lowered and swung in a linkage wire rack, which has a complex structure.

[0004] At present, there are many solutions for micro-electro-spark wire cutting, but the previous technical solutions are still not flexible enough, the swing range of the micro-electrode wire is extremely small, and the wire transportation mechanism is complicated. Summary of the invention

[0005] In view of the above problems, embodiments of the present invention are proposed to provide a direct-drive rotating wire holder for micro-electrical discharge wire cutting that overcomes the above problems or at least partially solves the above problems.

[0006] The embodiment of the present invention discloses a micro-electro-discharge wire cutting direct-drive rotating wire frame, which is used for tensioning and rotating a micro-electrode wire in a cutting direction, and comprises a control device, and a tension sensor assembly, a wire storage assembly, a wire collection assembly, and a guide wheel assembly for rotating the micro-electrode wire in a direction electrically connected to the control device respectively;

[0007] The wire storage assembly is provided on one side of the guide wheel assembly, and the wire collection assembly is provided on the other side of the guide wheel assembly; the tension sensor assembly is arranged on the side of the wire storage assembly away from the guide wheel assembly;

[0008] The guide wheel assembly includes a direct drive motor, a guide wheel column, a guide wheel, and a reversing guide wheel for converting the fine electrode wire to a preset angle; the direct drive motor is connected to the guide wheel through the guide wheel column, and the reversing guide wheels are arranged on both sides of the guide wheel column;

[0009] When the micro-EDM wire cutting direct-drive rotating wire rack is running, one end of the micro-electrode wire is wound from the bottom of the wire storage assembly to the top of the tension sensor assembly, and the micro-electrode wire is tensioned by friction with the inner wall of the wire storage wheel, and then goes half a circle along the tension sensor assembly to the bottom of the tension sensor, and then passes from the bottom of the guide wheel assembly to the guide wheel assembly, and then from the top of the guide wheel assembly to the top of the wire collection assembly.

[0010] Preferably, the reversing guide wheel comprises a first reversing guide wheel and a second reversing guide wheel; the first reversing guide wheel is connected to the second reversing guide wheel through the guide wheel column; the first reversing guide wheel is close to the wire storage assembly, and the second reversing guide wheel is close to the wire receiving assembly;

[0011] When the micro-EDM wire cutting direct-drive rotating wire rack is running, one end of the micro-electrode wire is wound from the bottom of the wire storage assembly to the top of the tension sensor assembly, and the micro-electrode wire is tensioned by friction with the wire storage wheel, and then goes along the tension sensor assembly for half a circle to the bottom of the tension sensor, and then passes from the bottom of the guide wheel assembly to the right reversing guide wheel, and then from the reversing guide wheel to the guide wheel, and then from the guide wheel to the left reversing guide wheel, and finally from the left reversing guide wheel around the top of the guide wheel assembly to the top of the wire collection assembly.

[0012] Preferably, the first reversing guide wheel and the second reversing guide wheel are both semicircular;

[0013] The arc surface of the first reversing guide wheel faces downward, and the arc surface of the second reversing guide wheel faces upward.

[0014] Preferably, the guide wheel assembly further includes a guide wheel bracket, a first reversing slot column, a second reversing slot column, a first guide wheel slot column and a second guide wheel slot column;

[0015] The first reversing groove column is arranged between the first reversing guide wheel and the guide wheel, the second reversing groove column is arranged between the second reversing guide wheel and the guide wheel, the first guide wheel groove column and the second guide wheel groove column are arranged on the side of the guide wheel away from the guide wheel column, and the first guide wheel groove column and the second guide wheel groove column are arranged side by side.

[0016] Preferably, it also includes a motor bracket; the tension sensor assembly is provided on one side of the motor bracket, and the wire storage assembly, the wire collection assembly and the guide wheel assembly are fixed by the motor bracket.

[0017] Preferably, the tension sensing assembly comprises a tension guide wheel and a tension sensor for measuring the tension of the fine electrode wire;

[0018] The tension guide wheel is arranged at one end of the tension sensor.

[0019] Preferably, the wire storage assembly comprises a first gland, a mandrel assembly, a wire storage wheel and a second gland;

[0020] One end of the mandrel assembly is connected to the first gland, and the other end of the mandrel assembly passes through the wire storage wheel and is connected to the second gland;

[0021] The first pressure cover and the core shaft assembly are arranged on the back side of the motor bracket, and the wire storage wheel and the second pressure cover are arranged on the front side of the motor bracket.

[0022] Preferably, the spindle assembly comprises a shell, and a spindle, a first deformable ring, a second deformable ring and a third deformable ring arranged inside the shell;

[0023] The core shaft passes through the shell sleeve, and the first deformation ring, the second deformation ring and the third deformation ring are arranged between the core shaft and the shell sleeve;

[0024] The first deformable ring is connected to the first pressure cover, the second deformable ring and the third deformable ring are arranged at the position of the wire storage wheel, and the third deformable ring is connected to the second pressure cover.

[0025] Preferably, the first deformable ring is interference fit with the shell sleeve, a sleeve is provided between the second deformable ring and the third deformable ring, the sleeve is a cylindrical ring, and the second deformable ring and the third deformable ring both expand radially under pressure from both sides and contact the inner wall to generate sliding friction.

[0026] Preferably, the wire collecting assembly comprises a wire collecting wheel motor, a wire collecting wheel and a wire collecting pressure cover;

[0027] The wire collecting wheel motor is arranged at the back of the motor bracket, the wire collecting wheel is arranged at the front of the motor bracket, and the wire collecting wheel motor is connected to the wire collecting pressure cover through the wire collecting wheel.

[0028] The present application specifically includes the following advantages:

[0029] In an embodiment of the present application, through the control device, and the tension sensing assembly, the wire storage assembly, the wire collection assembly and the guide wheel assembly for rotating the fine electrode wire electrically connected to the control device respectively; the wire storage assembly is provided on one side of the guide wheel assembly, and the wire collection assembly is provided on the other side of the guide wheel assembly; the tension sensing assembly is arranged on the side of the wire storage assembly away from the guide wheel assembly; the guide wheel assembly includes a direct drive motor, a guide wheel column, a guide wheel and a reversing guide wheel for converting the fine electrode wire to a preset angle; the direct drive motor is connected to the guide wheel through the guide wheel column, and the reversing guide wheels are arranged on both sides of the guide wheel column; when the direct drive rotating wire frame of the fine electric spark wire cutting is running, one end of the fine electrode wire is wound from the bottom of the wire storage assembly to the top of the tension sensing assembly, and the fine electrode wire is tensioned by friction with the wire storage wheel, and then along the tension sensor assembly half a circle to the bottom of the tension sensor, and then passed from the bottom of the guide wheel assembly to the guide wheel assembly, and then from the top of the guide wheel assembly to the top of the wire collection assembly. The present invention adopts an integrated design, and the fine electrode wire tensioning device, the guide wheel column direct drive system and the wire collection system are installed on the same motor bracket, and connected to the outside through the mounting holes on the motor bracket to achieve a modular design. By designing the path of the redirected fine electrode wire, the guide wheel column can achieve a positive and negative 90-degree rotation, which greatly expands the working range of the fine electrode wire cutting. Different from the traditional fine electrode wire tensioning device based on the pressure block, the present application proposes a fine electrode wire tensioning device based on sliding friction. The device is more compact and suitable for generating continuously adjustable fine electrode wire tensioning force. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the description of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0031] Figure 1 It is a structural schematic diagram of a micro-electric spark wire cutting direct-drive rotating wire frame of the present invention;

[0032] Figure 2 It is a front view of a direct-drive rotating wire frame for micro-electric spark wire cutting of the present invention;

[0033] Figure 3 It is a schematic cross-sectional structure diagram of a wire storage assembly of a micro-electric spark wire cutting direct-drive rotating wire rack of the present invention;

[0034] Figure 4 It is a side view structural schematic diagram of a micro-electric spark wire cutting direct-drive rotating wire frame of the present invention;

[0035] Figure 5 It is a side view structural schematic diagram of a micro-electric spark wire cutting direct-drive rotating wire frame of the present invention;

[0036] 1. Tension sensor assembly; 11. Tension sensor; 12. Tension guide wheel; 2. Wire storage assembly; 21. First pressure cap; 211. First deformation ring; 212. Shell; 213. Bearing; 22. Wire storage wheel; 221. Second deformation ring; 222. Third deformation ring; 223. Bushing; 23. Second pressure cap; 3. Wire collection assembly; 31. Direct drive motor; 32. Guide wheel column; 33. Guide wheel; 34. First reversing guide wheel; 35. Second reversing guide wheel; 36. Wire guide wheel; 4. Guide wheel assembly; 41. Wire collection wheel motor; 42. Wire collection wheel; 43. Wire collection pressure cap; 5. Motor bracket; 6. Fine electrode wire. DETAILED DESCRIPTION

[0037] In order to make the objects, features and advantages of the present application more obvious and understandable, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0038] Reference Figure 1-Figure 5 , shows a schematic structural diagram of a direct-drive rotating wire rack for micro-electro-spark wire cutting of the present invention, which may specifically include the following structures: a control device, and a tension sensing assembly, a wire storage assembly 2, a wire collection assembly 3, and a guide wheel assembly 4 for rotating the micro-electrode wire 6, which are electrically connected to the control device respectively; the wire storage assembly 2 is provided on one side of the guide wheel assembly 4, and the wire collection assembly 3 is provided on the other side of the guide wheel assembly 4; the tension sensing assembly is arranged on the side of the wire storage assembly 2 away from the guide wheel assembly 4; the guide wheel assembly 4 includes a direct-drive motor 31, a guide wheel column 32, a guide wheel 33, and a guide wheel assembly 4 for rotating the micro-electrode wire 6 A reversing guide wheel 33 is provided to convert a preset angle; the direct drive motor 31 is connected to the guide wheel 33 through the guide wheel column 32, and the reversing guide wheel 33 is arranged on both sides of the guide wheel column 32; when the fine electrode wire 6 rotates on the wire rack, one end of the fine electrode wire 6 is wound from the bottom of the wire storage assembly 2 to the top of the tension sensor assembly, and the fine electrode wire 6 is tensioned by friction with the inner wall of the wire storage wheel 22, and then goes along the tension sensor assembly 1 for half a circle to the bottom of the tension sensor 11, and then passes from the bottom of the guide wheel assembly 4 to the guide wheel assembly 4, and then from the top of the guide wheel assembly 4 to the top of the wire collection assembly 3.

[0039] In the embodiment of the present application, through the control device, and the tension sensing component, the wire storage component 2, the wire collection component 3 and the guide wheel component 4 for rotating the fine electrode wire 6 which are electrically connected to the control device respectively; the wire storage component 2 is provided on one side of the guide wheel component 4, and the wire collection component 3 is provided on the other side of the guide wheel component 4; the tension sensing component is arranged on the side of the wire storage component 2 away from the guide wheel component 4; the guide wheel component 4 includes a direct drive motor 31, a guide wheel column 32, a guide wheel 33 and a reversing guide wheel 33 for converting the fine electrode wire 6 to a preset angle ; The direct drive motor 31 is connected to the guide wheel 33 through the guide wheel column 32, and the reversing guide wheels 33 are arranged on both sides of the guide wheel column 32; when the fine electrode wire 6 rotates on the wire rack, one end of the fine electrode wire 6 is wound from the bottom of the wire storage assembly 2 to the top of the tension sensor assembly, and the fine electrode wire 6 is tensioned by friction with the wire storage wheel 22, and then along the tension sensor assembly 1 half a circle to the bottom of the tension sensor 11, and then passed from the bottom of the guide wheel assembly 4 to the guide wheel assembly 4, and then from the top of the guide wheel assembly 4 to the top of the wire collection assembly 3. The present invention adopts an integrated design, and the fine electrode wire 6 tensioning device, the guide wheel column 32 direct drive system and the wire collection system are installed on the same motor bracket 5, and connected to the outside through the mounting holes on the motor bracket 5 to achieve modular design. By designing the path of the redirected fine electrode wire 6, the guide wheel column 32 can achieve a positive and negative 90-degree rotation. The guide wheel column 32 is driven by the rotation of the direct drive motor 31, which greatly expands the working range of the fine electric spark wire cutting. Different from the traditional fine electrode wire 6 tensioning device based on the pressure block, the present application proposes a fine electrode wire 6 tensioning device based on sliding friction, which is more compact and suitable for generating a continuously adjustable fine electrode wire 6 tensioning force.

[0040] It should be noted that the fine electrode wire 6 of the present application is a very fine electrode wire 6 with a diameter of 10-50 microns.

[0041] Next, the direct-drive rotating wire holder for micro wire-cut electrical discharge machining in this exemplary embodiment will be further described.

[0042] In an embodiment of the present application, the tension sensing assembly is arranged on the side of the wire storage assembly 2 away from the guide wheel assembly 4. The tension sensing assembly includes a tension guide wheel and a tension sensor 11 for measuring the tension of the fine electrode wire 6; the tension guide wheel is arranged at one end of the tension sensor 11. The tension sensing assembly is arranged on one side of the motor bracket 5.

[0043] As an example, the tension sensor assembly 1 is fixed to the motor bracket 5 via a fixing plate, and the tension sensor assembly 1 is vertically connected to the motor bracket 5 .

[0044] In a specific embodiment, the tension guide wheel and the wire storage wheel 22 are at the same level, so that the fine electrode wire 6 of the wire storage wheel 22 can be wound around the tension guide wheel; the tension sensor 11 is connected to the rear of the tension guide wheel, and the tension sensor 11 is used to measure the tension of the fine electrode wire 6 wound around the tension guide wheel. The tension sensor 11 is electrically connected to the tension guide wheel. The tension guide wheel is used to wind the fine electrode wire 6, and the tension guide wheel is a cylinder with a depression in the middle, such as Figure 2 shown.

[0045] In one embodiment of the present application, the tension sensing assembly is provided on one side of the motor bracket 5 , and the wire storage assembly 2 , the wire collection assembly 3 and the guide wheel assembly 4 are fixed by the motor bracket 5 .

[0046] As an example, the motor bracket 5 is provided with a first circular hole, a second circular hole and a third circular hole; the first circular hole is adapted to the wire storage assembly 2, the second circular hole is adapted to the guide wheel assembly 4, and the third circular hole is adapted to the wire collection assembly 3. The motor bracket 5 is provided with the first circular hole, the second circular hole and the third circular hole in sequence from one side of the tension sensor assembly.

[0047] As an example, the motor bracket 5 is vertically arranged with the tension sensing assembly, the wire storage assembly 2, the wire collection assembly 3 and the guide wheel assembly 4 respectively; the tension sensing assembly, the wire storage assembly 2, the wire collection assembly 3 and the guide wheel assembly 4 are parallelly arranged respectively.

[0048] In an embodiment of the present application, the wire storage assembly 2 includes a first pressure cover 21, a core shaft assembly, a wire storage wheel 22 and a second pressure cover 23; one end of the core shaft assembly is connected to the first pressure cover 21, and the other end of the core shaft assembly passes through the wire storage wheel 22 and is connected to the second pressure cover 23; the first pressure cover 21 and the core shaft assembly are arranged on the back side of the motor bracket 5, and the wire storage wheel 22 and the second pressure cover 23 are arranged on the front side of the motor bracket 5.

[0049] In an embodiment of the present application, the spindle assembly includes a shell 212 and a spindle, a first deforming ring 211, a second deforming ring 221 and a third deforming ring 222 arranged inside the shell 212; the spindle passes through the shell 212, and the first deforming ring 211, the second deforming ring 221 and the third deforming ring 222 are arranged between the spindle and the shell 212; the first deforming ring 211 is connected to the first pressure cover 21, the second deforming ring 221 and the third deforming ring 222 are arranged at the position of the wire storage wheel 22, and the third deforming ring 222 is connected to the second pressure cover 23, as shown in FIG. Figure 3 shown.

[0050] In an embodiment of the present application, the first deformable ring 211 and the shell 212 utilize axial pressure to generate elastic deformation and radial expansion, and then contact the inner wall to generate friction. The second deformable ring 221 and the third deformable ring 222 respectively utilize axial pressure to generate elastic deformation and radial expansion with the wire storage wheel 22, and then contact the inner wall to generate friction.

[0051] As an example, the middle part of the wire storage assembly 2 is connected to the motor bracket 5, and the wire storage assembly 2 is provided with the first pressure cap 21, the shell 212, the wire storage wheel 22 and the second pressure cap 23 in sequence; the core shaft, the first deformation ring 211, the second deformation ring 221 and the third deformation ring 222 are provided inside the shell 212; the first deformation ring 211, the second deformation ring 221 and the third deformation ring 222 are all circular rings, which are sleeved on the outside of the core shaft. The second deformation ring 221 and the third deformation ring 222 both expand radially under the pressure from both sides and contact the inner wall to generate sliding friction.

[0052] As an example, the core shaft outer sleeve is provided with the first deformable ring 211, the second deformable ring 221 and the third deformable ring 222, the wire storage wheel 22 is sleeved on the outer side of the second deformable ring 221 and the third deformable ring 222, the shell 212 is sleeved on the outer side of the first deformable ring 211, one end of the core shaft is provided with the first pressure cover 21, and the other end of the core shaft is provided with the second pressure cover 23, the first pressure cover 21 is in contact with the first deformable ring 211, and the second pressure cover 23 is in contact with the third deformable ring 222.

[0053] In a specific embodiment, the third deformable ring 222 and the second deformable ring 221 at the bottom of the wire storage wheel 22 are symmetrically arranged, and a sleeve 223 is arranged between the second deformable ring 221 and the third deformable ring 222, and the sleeve 223 is a cylindrical ring. The mandrel is also provided with a bearing 213 at a position close to the motor bracket 5.

[0054] In a specific embodiment, the tension of the fine electrode wire 6 comes from the extrusion deformation of the deformation ring inside the wire storage wheel 22 and the sliding friction generated by the inner wall of the wire storage wheel 22. The wire collection wheel motor 41 drives the fine electrode wire 6 to run. The extrusion of the deformation ring is achieved through the mandrel, the gland, the sleeve 223, the shell 212 and the bearing 213. The compression of the deformation ring is adjusted by the screwing depth of the gland, and then the friction is adjusted, which is finally reflected in the tension of the fine electrode wire 6.

[0055] In an embodiment of the present application, the guide wheel assembly 4 includes a direct drive motor 31, a guide wheel column 32, a guide wheel 33 and a reversing guide wheel 33 for converting the fine electrode wire 6 to a preset angle; the direct drive motor 31 is connected to the guide wheel 33 through the guide wheel column 32, and the reversing guide wheel 33 is arranged on both sides of the guide wheel column 32.

[0056] In an embodiment of the present application, the reversing guide wheel 33 includes a first reversing guide wheel 34 and a second reversing guide wheel 35; the first reversing guide wheel 34 is connected to the second reversing guide wheel 35 through the guide wheel column 32; the first reversing guide wheel 34 is close to the wire storage assembly 2, and the second reversing guide wheel 35 is close to the wire collection assembly 3.

[0057] When the micro-EDM wire cutting direct-drive rotating wire rack is running, one end of the micro-electrode wire 6 is wound from the bottom of the wire storage assembly 2 to the top of the tension sensor assembly, and the micro-electrode wire 6 is tensioned by friction with the wire storage wheel 22, and then goes half a circle along the tension sensor assembly 1 to the bottom of the tension sensor 11, and then passes from the bottom of the guide wheel assembly 4 to the right reversing guide wheel, and then from the reversing guide wheel 33 to the guide wheel 33, and then from the guide wheel 33 to the left reversing guide wheel, and finally from the left reversing guide wheel around the top of the guide wheel assembly 4 to the top of the wire collection assembly 3.

[0058] In an embodiment of the present application, the first reversing guide wheel 34 and the second reversing guide wheel 35 are both semicircular; the arc surface of the first reversing guide wheel 34 faces downward, and the arc surface of the second reversing guide wheel 35 faces upward. The guide wheel assembly 4 further includes a guide wheel 33 bracket, a first reversing slot column, a second reversing slot column, a first guide wheel slot column, and a second guide wheel slot column; the first reversing slot column is arranged between the first reversing guide wheel 34 and the guide wheel 33, the second reversing slot column is arranged between the second reversing guide wheel 35 and the guide wheel 33, the first guide wheel slot column and the second guide wheel slot column are arranged on the side of the guide wheel 33 away from the guide wheel column 32, and the first guide wheel slot column and the second guide wheel slot column are arranged side by side.

[0059] As an example, the direct drive motor 31 is arranged on the back of the motor bracket 5, and the other components of the guide wheel assembly 4 are arranged on the front of the motor bracket 5. The guide wheel column 32 is connected to the motor bracket 5 through a ceramic bearing 213. A guide wire wheel 36 is also provided between the ceramic bearing and the guide wheel column 32. The guide wire wheel 36 is circular, and one side of the guide wire wheel 36 is connected to the ceramic bearing, and the other side of the guide wire wheel 36 is connected to the guide wheel column 32.

[0060] As an example, the guide wheel column 32 is provided with the guide wheel 33 in the direction away from the motor bracket 5, the middle part of the guide wheel column 32 is provided with a groove, the side of the guide wheel column 32 close to the wire storage assembly 2 is provided with the first reversing guide wheel 34, and the side of the guide wheel column 32 close to the wire collecting assembly 3 is provided with the second reversing guide wheel 35.

[0061] In a specific embodiment, the fine electrode wire 6 is wound from the bottom of the sensor assembly to the bottom of the guide wheel 36, and then from the guide wheel 36 to the arc surface of the second reversing guide wheel 35 upward, and then to the second reversing groove column around the arc surface of the second reversing guide wheel 35, and then through the second guide wheel groove column and the first guide wheel groove column in sequence, and then to the first reversing groove column on the side, and then downward to the arc surface of the first reversing guide wheel 34, and then through the top of the guide wheel 36 to the wire collecting wheel 42.

[0062] In a specific embodiment, the wire storage wheel 22, the tension guide wheel, the wire guide wheel 36 and the wire collection wheel 42 are all on the same horizontal plane, that is, the common tangents are parallel.

[0063] In a specific embodiment, the V-shaped groove on the guide wheel column 32 is parallel to the common tangent line of the wire collection wheel 42 and the V-shaped groove on the lower wire guide wheel 36 is parallel to the common tangent line of the tension guide wheel, and these two common tangent lines (parallel lines) coincide with the wire travel path. The V-shaped groove on the head groove column of the guide wheel column 32 supports the fine electrode wire.

[0064] In an embodiment of the present application, the wire collecting assembly 3 includes a wire collecting wheel motor 41, a wire collecting wheel 42 and a wire collecting pressure cover 43; the wire collecting wheel motor 41 is arranged on the back of the motor bracket 5, and the wire collecting wheel 42 is arranged on the front of the motor bracket 5, and the wire collecting wheel motor 41 is connected to the wire collecting pressure cover 43 through the wire collecting wheel 42.

[0065] Each embodiment in this specification is described in a progressive manner, and the embodiments focus on the differences from other embodiments. Similar parts between the embodiments can be referenced to each other.

[0066] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0067] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the presence of other identical elements in the process, method, article or terminal device including the elements.

[0068] The above is a detailed introduction to the direct-drive rotating wire frame for micro-EDM provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A direct-drive rotating wire frame for micro-electro-discharge wire cutting, which is used for tensioning and rotating the micro-electrode wire in the cutting direction, and is characterized in that: It includes a control device, and a tension sensor assembly, a wire storage assembly, a wire collection assembly and a guide wheel assembly for rotating the fine electrode wire, which are electrically connected to the control device respectively; The wire storage assembly is provided on one side of the guide wheel assembly, and the wire collection assembly is provided on the other side of the guide wheel assembly; the tension sensor assembly is arranged on the side of the wire storage assembly away from the guide wheel assembly; It also includes a motor bracket; one side of the motor bracket is provided with the tension sensor assembly, and the wire storage assembly, the wire collection assembly and the guide wheel assembly are fixed by the motor bracket; The wire storage assembly comprises a first gland, a mandrel assembly, a wire storage wheel and a second gland; One end of the mandrel assembly is connected to the first gland, and the other end of the mandrel assembly passes through the wire storage wheel and is connected to the second gland; The first gland and the spindle assembly are arranged on the back side of the motor bracket, and the wire storage wheel and the second gland are arranged on the front side of the motor bracket; The spindle assembly comprises a shell, a spindle arranged inside the shell, a first deformable ring, a second deformable ring and a third deformable ring; The core shaft passes through the shell sleeve, and the first deformation ring, the second deformation ring and the third deformation ring are arranged between the core shaft and the shell sleeve; The first deformable ring is connected to the first gland, the second deformable ring and the third deformable ring are arranged at the position of the wire storage wheel, and the third deformable ring is connected to the second gland; The guide wheel assembly includes a direct drive motor, a guide wheel column, a guide wheel, and a reversing guide wheel for converting the fine electrode wire to a preset angle; The direct drive motor is connected to the guide wheel through the guide wheel column, and the reversing guide wheels are arranged on both sides of the guide wheel column; The tension sensing assembly includes a tension guide wheel and a tension sensor for measuring the tension of the fine electrode wire; the tension guide wheel is arranged at one end of the tension sensor; When the micro-EDM wire cutting direct-drive rotating wire rack is running, one end of the micro-electrode wire is wound from the bottom of the wire storage assembly to the top of the tension sensor assembly, and the micro-electrode wire is tensioned by friction with the inner wall of the wire storage wheel, and then goes along the tension sensor assembly for half a circle to the bottom of the tension sensor, and then passes from the bottom of the guide wheel assembly to the guide wheel assembly, and then from the top of the guide wheel assembly to the top of the wire collection assembly.

2. The direct-drive rotating wire frame for micro-EDM wire cutting according to claim 1, characterized in that: The reversing guide wheel comprises a first reversing guide wheel and a second reversing guide wheel; the first reversing guide wheel is connected to the second reversing guide wheel through the guide wheel column; the first reversing guide wheel is close to the wire storage assembly, and the second reversing guide wheel is close to the wire collection assembly; When the micro-EDM wire cutting direct-drive rotating wire rack is running, one end of the micro-electrode wire is wound from the bottom of the wire storage assembly to the top of the tension sensing assembly, and the micro-electrode wire is tensioned by friction with the wire storage wheel, and then goes along the tension sensing assembly for half a circle to the bottom of the tension sensor, and then passes from the bottom of the guide wheel assembly to the second reversing guide wheel, and then from the second reversing guide wheel to the guide wheel, and then from the guide wheel to the first reversing guide wheel, and finally from the first reversing guide wheel around the top of the guide wheel assembly to the top of the wire collection assembly.

3. The direct-drive rotating wire frame for micro-EDM wire cutting according to claim 2, characterized in that: The first reversing guide wheel and the second reversing guide wheel are both semicircular; The arc surface of the first reversing guide wheel faces downward, and the arc surface of the second reversing guide wheel faces upward.

4. The direct-drive rotating wire frame for micro-EDM wire cutting according to claim 2, characterized in that: The guide wheel assembly also includes a guide wheel bracket, a first reversing slot column, a second reversing slot column, a first guide wheel slot column and a second guide wheel slot column; The first reversing groove column is arranged between the first reversing guide wheel and the guide wheel, the second reversing groove column is arranged between the second reversing guide wheel and the guide wheel, the first guide wheel groove column and the second guide wheel groove column are arranged on the side of the guide wheel away from the guide wheel column, and the first guide wheel groove column and the second guide wheel groove column are arranged side by side.

5. The direct-drive rotating wire frame for micro-EDM wire cutting according to claim 1, characterized in that: A shaft sleeve is arranged between the second deformable ring and the third deformable ring, and the shaft sleeve is a cylindrical ring. The second deformable ring and the third deformable ring both expand radially under the pressure from both sides and contact the inner wall to generate sliding friction.

6. The direct-drive rotating wire frame for micro-EDM wire cutting according to claim 1, characterized in that: The wire collecting assembly comprises a wire collecting wheel motor, a wire collecting wheel and a wire collecting pressure cover; The wire collecting wheel motor is arranged at the back of the motor bracket, the wire collecting wheel is arranged at the front of the motor bracket, and the wire collecting wheel motor is connected to the wire collecting pressure cover through the wire collecting wheel.

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