Guide mechanism of medium-speed wire cut electric discharge machine

Abstract

The utility model provides a guide mechanism of a medium-speed wire cut electrical discharge machine, which belongs to the technical field of medium-speed wire cut electrical discharge, and comprises a lower processing arm, a wire feeding mechanism, a guide wheel and a guide wheel cover, a mounting cavity for the guide wheel to rotate is formed between the guide wheel cover and the tail end of the lower processing arm, and the guide wheel is positioned below the wire feeding mechanism. A groove is formed in the side wall of the guide wheel in the circumferential direction of the guide wheel, the groove comprises a slag discharging groove part and a guide groove part which are arranged from inside to outside, the width of the slag discharging groove part is smaller than the diameter of a molybdenum wire, the width of the guide groove part is matched with the molybdenum wire, and the molybdenum wire is conveyed along the guide groove part; a guide wire channel communicated with the guide groove part is arranged on the upper end surface of the guide groove part towards the guide groove part; according to the molybdenum wire conveying device, the rotatable guide wheel is adopted to replace a traditional wire guide pipe, during continuous rotation of the guide wheel, the molybdenum wire conveying efficiency can be improved, deslagging is facilitated, the molybdenum wire can be well protected, and the service life of the molybdenum wire can be prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of wire-cut electrical discharge machining, and particularly relates to a guide mechanism of a medium-speed wire-cut electrical discharge wire cutting machine. BACKGROUND

[0002] Medium-speed wire-cut electrical discharge machining is a kind of electrical discharge machining technology that utilizes the principle of electric pulse discharge to generate high-temperature molten and vaporized metal on workpieces through molybdenum wire or other electrode wires, thereby realizing material cutting. The technology is performed in insulating liquid (usually deionized water or special cutting liquid), and the workpieces are not contacted during the machining process, so that mechanical stress and deformation are not generated. Therefore, the technology is suitable for machining thin-walled and fine parts. Medium-speed wire-cut electrical discharge machining has advantages of high precision, high efficiency and good surface quality, and can achieve micron-level machining precision. Therefore, the technology is suitable for cutting various complex shapes and fine structures. The technology is widely applied in fields of mold manufacturing, precision machinery, aerospace, medical equipment and electronic manufacturing, and can be used to machine almost all conductive materials, including hard alloy, titanium alloy and aluminum alloy.

[0003] The existing medium-speed wire-cut electrical discharge wire cutting machine generally sets a wire feeding mechanism on a lower machining arm, and a wire guide pipe is arranged below the wire feeding mechanism to guide the molybdenum wire back to the wire feeding mechanism to form a recycling process. However, the structure of the wire guide pipe is difficult to discharge slag during the process of guiding the molybdenum wire, and the wire guide pipe is easily blocked, thereby affecting the normal recycling of the molybdenum wire. TECHNICAL SOLUTION

[0004] The utility model aims at overcoming the shortcomings and deficiencies of the prior art, and provides a guide mechanism of a medium-speed wire-cut electrical discharge wire cutting machine.

[0005] The utility model discloses a guide mechanism of a medium-speed wire-cut electrical discharge wire cutting machine, which comprises a lower machining arm, a wire feeding mechanism arranged on the lower machining arm, a guide roller and a guide roller cover. An installation cavity for rotatingly arranging the guide roller is formed between the guide roller cover and the end of the lower machining arm. The guide roller is arranged below the wire feeding mechanism. A groove is arranged on the side wall of the guide roller along the circumferential direction of the guide roller. The groove comprises a slag discharge groove part and a guide groove part arranged from inside to outside. The width of the slag discharge groove part is smaller than the diameter of the molybdenum wire. The width of the guide groove part is matched with the molybdenum wire. The molybdenum wire is conveyed along the guide groove part. An opening is arranged below the installation cavity, and a wire guide channel is arranged on the upper end surface of the opening and connected with the guide groove part.

[0006] In some embodiments, the cross section of the guide groove part is trapezoidal, and the upper bottom side of the guide groove part faces the slag discharge groove part.

[0007] In some embodiments, the groove bottom part of the slag discharge groove part is arranged in an arc shape.

[0008] In some embodiments, a guide wire seat is arranged on the guide wheel cover, and a wire nozzle is arranged on the guide wire seat, the wire nozzle is provided with a wire outlet channel in the axial direction of the wire nozzle, the wire outlet channel is coaxially arranged with the guide wire channel, and the wire outlet channel is arranged in a manner that the width of the wire outlet channel is gradually reduced from top to bottom.

[0009] In some embodiments, a guide wire assembly is arranged on the bottom of the lower machining arm, the guide wire assembly comprises a wire feeding tube and a negative pressure device, the wire feeding tube is arranged along the length direction of the lower machining arm, the negative pressure device is arranged at one end of the wire feeding tube close to the opening, and the negative pressure device comprises a suction nozzle and an exhaust nozzle, the suction nozzle faces the opening, and the exhaust nozzle faces the wire feeding tube.

[0010] In some embodiments, a mounting groove is arranged on the bottom of the lower machining arm along the length direction of the lower machining arm, and the wire feeding tube and the negative pressure device are arranged in the mounting groove.

[0011] In some embodiments, a driver for driving the rotation of the guide wheel is further included.

[0012] In some embodiments, a plurality of first connecting holes are arranged on the guide wheel cover, and a second connecting hole corresponding to each first connecting hole is arranged at the end of the lower machining arm.

[0013] In some embodiments, the cross section of the groove is V-shaped.

[0014] The beneficial effects of the utility model are as follows: in the utility model, the rotatable guide wheel replaces the traditional guide wire tube, the guide wheel can not only improve the efficiency of molybdenum wire conveying, but also is beneficial to slag discharge, and can better protect the molybdenum wire and prolong the service life of the molybdenum wire. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings obtained according to these drawings without creative labor still belong to the scope of the utility model.

[0016] Figure 1 The schematic diagram of the lower machining arm in the utility model Figure 1

[0017] The schematic diagram of the lower machining arm in the utility model Figure 2

[0018] The schematic diagram of the lower machining arm in the utility model Figure 3 Figure 2

[0019] Figure 4 ​​It is the partial sectional view of lower processing arm in the utility model;

[0020] Figure 5 It is the partial sectional view of one guide wheel in the utility model;

[0021] Figure 6 It is the partial sectional view of another guide wheel in the utility model. DETAILED DESCRIPTION

[0022] The following description provides specific application scenarios and requirements of the present specification, so as to enable those skilled in the art to manufacture and use the contents of the present specification. Various local modifications of the disclosed embodiments are obvious to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of the present specification. Therefore, the present specification is not limited to the shown embodiments, but is consistent with the widest range of claims.

[0023] In the description of the present application, it should be pointed out that, unless otherwise explicitly specified and limited, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "radial", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0024] Secondly, the terms "first", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components and should not be understood as a limitation on the embodiments of the present application.

[0025] In addition, the terms "mounting", "setting", "providing", "connecting", "connecting" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components.

[0026] For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] With regard to the drawings of the present application, it should be clearly understood that the drawings are only for illustrative and descriptive purposes, and are not intended to limit the scope of the present specification. It should also be understood that the drawings are not drawn to scale.

[0028] Example one:

[0029] As Figures 1 to 6 shown, the embodiment provides a guide mechanism of a medium-speed wire-cut EDM machine, which comprises a lower machining arm 1, a wire feeding mechanism 5 arranged on the lower machining arm 1, the wire feeding mechanism 5 adopting a corresponding mechanism on a traditional wire-cut EDM machine or a medium-speed wire-cut EDM machine, which is used to allow the molybdenum wire to continuously pass through a workpiece between the upper machining arm and the lower machining arm 1 to realize wire cutting.

[0030] Specifically, it further comprises a guide wheel 2 and a guide wheel cover 3, in a specific case, the conveying of the molybdenum wire can also drive the guide wheel 2 to rotate, preferably, the guide wheel 2 is driven to rotate by a driver, the driver can adopt a servo motor, an installation cavity 4 for the rotation of the guide wheel 2 is formed between the guide wheel cover 3 and the end of the lower machining arm 1, the guide wheel 2 is located below the wire feeding mechanism 5, the side wall of the guide wheel 2 is provided with a groove 20 along the circumferential direction thereof, the groove 20 comprises a slag discharge groove part 200 and a guide groove part 201 arranged from inside to outside, the width of the slag discharge groove part 200 is smaller than the diameter of the molybdenum wire, the molybdenum wire cannot enter the slag discharge groove part 200, but some fine slag in the machining process can enter the slag discharge groove part 200 and be discharged by continuously rotating with the guide wheel 2, the width of the guide groove part 201 is matched with the molybdenum wire, the molybdenum wire is conveyed along the guide groove part 201, an opening 6 is arranged below the installation cavity 4, and the upper end thereof is provided with a wire guide channel 7 which is communicated with the guide groove part 201, so as to ensure that the molybdenum wire is accurately conveyed to the guide groove part 201, secondly, the rotatable guide wheel 2 replaces the traditional wire guide pipe, in the continuous rotation of the guide wheel 2, not only the efficiency of the molybdenum wire conveying is improved, but also the slag is effectively discharged while the molybdenum wire is guided, and the molybdenum wire can be better protected to prolong its service life.

[0031] Preferably, the cross section of the guide groove part 201 is trapezoidal, the upper bottom side thereof faces the slag discharge groove part 200, the trapezoidal cross section provides stable support for the molybdenum wire to improve the stability of the molybdenum wire conveying, at the same time, it can be adapted to molybdenum wires of various specifications, and is conducive to the natural sliding of fine slag into the slag discharge groove part 200.

[0032] Preferably, the groove bottom of the slag discharge groove part 200 is arranged in an arc shape to avoid the accumulation of fine slag, enhance the self-cleaning effect, and reduce the dependence on manual cleaning.

[0033] As Figure 6 shown, the cross section of the groove can also be V-shaped.

[0034] In the embodiment of the disclosure, the guide wheel cover 3 is provided with a wire guide seat 8, the wire guide seat 8 is provided with a wire nozzle 80, the wire nozzle 80 is provided with a wire outlet channel 81 along the axial direction thereof, the wire outlet channel 81 is coaxially arranged with the wire guide channel 7 and is arranged in a wide upper and narrow lower manner, so as to realize more stable and efficient transmission of the molybdenum wire and improve the performance and reliability of the machining equipment.

[0035] In the embodiment of the present disclosure, the bottom of the lower machining arm 1 is provided with a wire guide assembly 9, which comprises a wire feeding pipe 90 and a negative pressure device 91, and the negative pressure device 91 can be a negative pressure vacuum pump. The wire feeding pipe 90 is arranged along the length direction of the lower machining arm 1, and the negative pressure device 91 is arranged at one end of the wire feeding pipe 90 close to the opening 6, which comprises a suction nozzle 910 and an exhaust nozzle 911. The suction nozzle 910 is directed towards the opening 6, and the exhaust nozzle 911 is directed towards the wire feeding pipe 90. Through this arrangement, the molybdenum wire is transported along the direction of the suction nozzle 910, the exhaust nozzle 911 and the wire feeding pipe 90, which not only improves the transportation efficiency of the molybdenum wire, but also improves the efficiency of slag removal.

[0036] Optionally, the bottom of the lower machining arm 1 is provided with a mounting groove 10 along the length direction thereof, and the wire feeding pipe 90 and the negative pressure device 91 are arranged in the mounting groove 10, which realizes the compactness and integration of the structure, saves space, prevents the wire feeding pipe 90 and the negative pressure device 91 from being damaged externally, and improves the durability of the assembly.

[0037] In addition, the guide wheel cover 3 is provided with a plurality of first connecting holes 11, and the end of the lower machining arm 1 is provided with a second connecting hole 12 corresponding to the first connecting hole 11. The first connecting hole 11 and the second connecting hole 12 are threadedly connected by a bolt, which facilitates the disassembly and assembly of the guide wheel cover 3 and is conducive to the maintenance and cleaning of the guide wheel 2.

[0038] In summary, after reading the detailed disclosure, those skilled in the art can understand that the foregoing detailed disclosure can be presented only in an exemplary manner and can not be limiting. Although it is not explicitly stated here, those skilled in the art can understand that the present application requires to cover various reasonable changes, improvements and modifications of the embodiments. These changes, improvements and modifications are intended to be proposed by the present application and are within the spirit and scope of the exemplary embodiments of the present application.

[0039] In addition, it should be understood that in the foregoing description of the embodiments of the present application, for the purpose of helping to understand one feature, the present application combines various features in a single embodiment, figure or its description for the purpose of simplifying the present application. However, this does not mean that the combination of these features is necessary, and those skilled in the art can certainly mark out part of the equipment as a separate embodiment when reading the present application. That is, the embodiments in the present application can also be understood as the integration of multiple secondary embodiments. And the content of each secondary embodiment is also valid when there are less than all the features of a single foregoing disclosed embodiment.

[0040] Finally, it should be understood that the embodiments of the application disclosed herein are illustrative of the principles of the present application. Other modifications that are obvious within the spirit and principles of the application are encompassed within the scope of the application. Accordingly, the disclosure of embodiments of the application is intended to be illustrative, but not limiting, of the scope of the application. Those of skill in the art could readily devise their own modifications to the specific embodiments disclosed within the scope of the application. Accordingly, the disclosure of embodiments of the application is intended to be illustrative, but not limiting, of the scope of the application.

Claims

1. A guiding mechanism of a medium-speed wire cut electrical discharge wire-cut electrical discharge machine, comprising a lower machining arm (1), a wire feeding mechanism (5) is arranged on the lower machining arm (1), characterized in that, The guide wheel (2) is arranged in the installation cavity (4) formed between the end of the lower machining arm (1) and the guide wheel cover (3), and below the wire feeding mechanism (5).

2. The guiding mechanism of a medium-speed WEDM according to claim 1, characterized in that, The guide groove (201) has a trapezoidal cross section, and the upper side of the bottom thereof faces the slag discharge groove (200).

3. The guiding mechanism of a medium-speed WEDM according to claim 1, characterized in that, The bottom of the slag discharge groove (200) is arranged in an arc shape.

4. The guiding mechanism of a medium-speed WEDM according to claim 1, characterized in that, The guide wheel cover (3) is provided with a wire guide seat (8), and the wire guide seat (8) is provided with a wire nozzle (80).

5. The guiding mechanism of a medium-speed WEDM according to claim 1, characterized in that, The bottom of the lower machining arm (1) is provided with a wire guide assembly (9) including a wire feeding pipe (90) and a negative pressure device (91).

6. The guiding mechanism of a medium-speed WEDM according to claim 5, characterized in that, The wire feeding pipe (90) is arranged along the length direction of the lower machining arm (1), and the negative pressure device (91) is arranged at one end of the wire feeding pipe (90) close to the opening (6) and includes a suction nozzle (910) and an exhaust nozzle (911).

7. The guiding mechanism of a medium-speed WEDM according to claim 1, characterized in that, The bottom of the lower machining arm (1) is provided with a mounting groove (10) along the length direction thereof, and the wire feeding pipe (90) and the negative pressure device (91) are arranged in the mounting groove (10).

8. The guiding mechanism of a medium-speed WEDM according to claim 1, characterized in that, The guide wheel cover (3) is provided with a plurality of first connecting holes (11), and the end of the lower machining arm (1) is provided with a second connecting hole (12) corresponding to the first connecting hole (11).

9. The guiding mechanism of a medium-speed WEDM according to claim 1, characterized in that, The cross section of the recess (20) is V-shaped.

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