Airflow wire guide device for ultra-fine electrode wire transportation in wire-cutting machine tools

Abstract

The present invention discloses an airflow wire guiding device for transporting ultra-fine electrode wires in a slow-feeding wire-cutting machine tool, comprising a side fixing component and an airflow wire guiding structure, wherein the side fixing component is provided with a through hole running through the left and right sides and a regulating valve mounting hole connected with the through hole, and the airflow wire guiding structure comprises a first connecting block and a second connecting block, the first connecting block is provided with a first conical hole, the second connecting block comprises a first connecting part, a middle connecting part and a second connecting part, the first connecting part is provided with a second conical hole, and the first connecting part is provided with a transverse guide hole passing through the second conical hole and connected with an annular airflow groove; when the airflow regulating valve is operated, the airflow flows into the second conical hole and the first conical hole in sequence along the regulating valve mounting hole, the annular airflow groove and the transverse guide hole and is discharged along the small end of the first conical hole, so as to guide the tail electrode wire and avoid short circuit and machine shutdown due to winding of the electrode wire.

Description

Technical Field

[0001] The invention relates to machine tool technology, in particular to an airflow wire guiding device used for transporting ultra-fine electrode wires in slow-moving wire-cutting machines. Background Art

[0002] Currently, wire-cut EDM refers to a type of CNC machine tool that can remove metal and cut workpieces. Wire-cut EDM utilizes a continuously moving thin metal wire (typically copper or molybdenum) as an electrode to generate pulsed spark discharges into the workpiece, generating temperatures exceeding 6,000°C (14,000°F) to remove metal and create the final product.

[0003] The patent document with application number "CN202323171387.0" discloses a wire-cutting machine tool, comprising a machine tool body, on which a fixing mechanism is provided; the fixing mechanism comprises a connecting mechanism, the bottom of the middle portion of the connecting mechanism is movably connected to a support assembly, the connecting mechanism is provided with a first adjustment assembly, the bottom of the connecting mechanism is provided with a second adjustment assembly, and the support assembly and the second adjustment assembly are both fixedly mounted on the machine tool body. The advantage of the present utility model is that the wire-cutting machine tool, by providing a fixing mechanism, can adjust the angle of the mold as needed during use, thereby avoiding the occurrence of a taper in which the cutting seam is wider at the top and narrower at the bottom due to the loss of the electrode wire when the mold is cut, thereby ensuring the accuracy of the processing, avoiding the situation where the size or quality of the parts manufactured using the mold does not meet the standards due to errors in the mold, and at the same time ensuring the stability of the mold during the cutting process, thereby improving the accuracy of the mold processing.

[0004] The patent document with application number "CN201921302112.7" discloses a cylinder-type electrode wire normally-open clamp, which includes a fixed bracket with a guide seat provided at the bottom, and the upper end of the guide seat extends to the four sides to form a boss. The interior of the guide seat is provided with a first cavity and a second cavity, and the two ends of the guide are respectively arranged in the fixed bracket and the second cavity. One end of the ceramic guide structure extends out of the second cavity. The electrode wire passes through the guide, the guide seat and the ceramic guide structure in sequence from the top of the fixed bracket. A through hole for installing the cylinder is provided on the side wall of the boss. One end of the cylinder extending into the first cavity is connected to a clamping block, and a clamping hole is opened along the side wall of the guide at the position opposite to the clamping block and the guide.

[0005] Patent document numbered "CN202220617851.0" discloses an electrode wire guide device for a wire-cutting machine tool. The device comprises, from the inside out, a replacement tube, a base tube, and an outer shell. The replacement tube comprises a first upper body and a lower inner tube fixedly connected up and down. An axial electrode wire hole is provided between the first upper body and the lower inner tube. A first external thread is provided at the upper end of the outer wall of the lower inner tube. The base tube comprises a second upper body and a lower middle tube fixedly connected up and down. A middle hole is axially provided between the second upper body and the lower middle tube to cooperate with the lower inner tube. The upper end of the inner wall of the middle hole is provided with a first internal thread that cooperates with the first external thread. A second external thread is provided at the upper end of the outer wall of the lower middle tube. The replacement tube of the utility model can be replaced after wear, without the need to replace the base tube and outer shell, resulting in low maintenance costs. In addition, when the utility model is in use, coolant enters the coolant chamber through the liquid inlet hole and is sprayed from the annular nozzle toward the middle and lower part to cool the electrode wire, achieving a good cooling effect.

[0006] The above patent documents, combined with the existing technology, all focus on the problem of wire guidance at the machine head. However, the existing tail wire drainage method used for ultra-fine electrode wire of wire-cutting machine tools has the following defects:

[0007] Existing technology, WEDM machines originally configured with 0.25mm wire feeders are not suitable for wire-cutting patterned workpieces with an R / D of less than 0.12mm. Due to the development of the automotive lighting industry, the requirements for R / D angles of headlight patterns are becoming increasingly precise, and the requirements for mold surfaces are becoming increasingly stringent. WEDM machines originally configured with 0.25mm wire feeders are unable to meet these requirements, necessitating the use of finer wire, such as 0.07mm copper wire.

[0008] However, when the wire-cutting machine tool uses 0.07mm electrode wire for processing, because the 0.07mm wire is too thin and light, when the electrode wire passes between the wire pressing wheels, the wire bends and twists when it is led out, resulting in poor wire feeding and frequent wire breakage, obvious line marks on the cutting surface, and poor processing accuracy, which has a great impact on the mold quality and production efficiency. Summary of the Invention

[0009] In order to overcome the deficiencies of the prior art, the present invention provides an airflow wire guiding device for transporting ultra-fine electrode wires of wire-cutting machines, which solves the problem of tail wire drainage of ultra-fine electrode wires of wire-cutting machines.

[0010] The first aspect of the present invention is to provide an airflow wire guiding device for feeding ultra-fine electrode wire of a slow-moving wire-cutting machine tool, comprising a side fixing component and an airflow wire guiding structure, wherein the side fixing component is provided with a through hole running through the left and right sides and a regulating valve mounting hole connected with the through hole, and an airflow regulating valve is installed at the regulating valve mounting hole; the airflow wire guiding structure comprises a first connecting block and a second connecting block, wherein the first connecting block is provided with a first tapered hole, and the second connecting block comprises a first connecting portion, a middle connecting portion and a second connecting portion connected in sequence, wherein the first connecting portion is provided with a second tapered hole, and the first connecting portion is connected with the An annular air flow groove is formed along the middle connecting portion of the second connecting portion, and a transverse guide hole is provided at the first connecting portion, which passes through the second conical hole and is connected to the annular air flow groove; the first connecting block is fitted with the second connecting block, and the large end of the second conical hole is connected with the large end of the first conical hole. The electrode wire passes through the second conical hole and the first conical hole and moves. The airflow regulating valve operates to make the airflow flow into the second conical hole and the first conical hole in sequence along the regulating valve mounting hole, the annular air flow groove, and the transverse guide hole and be discharged along the small end of the first conical hole, so as to guide the tail electrode wire.

[0011] In the first aspect of the present invention, as a preferred embodiment, the second tapered hole forms a tapered hole end surface line along the end surface of the first connecting portion, and the transverse guide hole passes through the tapered hole end surface line.

[0012] In the first aspect of the present invention, as a preferred embodiment, the number of the transverse guide holes is 2-6.

[0013] In the first aspect of the present invention, as a preferred embodiment, the number of the transverse guide holes is 4, and the 4 transverse guide holes are evenly distributed around the second tapered hole.

[0014] In the first aspect of the present invention, as a preferred embodiment, the maximum diameter of the first tapered hole is greater than or equal to the maximum diameter of the second tapered hole.

[0015] In the first aspect of the present invention, as a preferred embodiment, the side fixing assembly includes a sleeve portion and a side fixing portion, and the side fixing portion is connected to the side of the sleeve portion.

[0016] In the first aspect of the present invention, as a preferred embodiment, the regulating valve mounting hole and the through hole are located in the sleeve portion.

[0017] In the first aspect of the present invention, as a preferred embodiment, the side fixing portion is provided with strip-shaped fixing holes along the length direction.

[0018] In the first aspect of the present invention, as a preferred embodiment, the first tapered hole is provided with a first arc-shaped chamfer along the end surface.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The first connecting block is provided with a first conical hole, and the second connecting block includes a first connecting portion, a middle connecting portion, and a second connecting portion connected in sequence. The first connecting portion is provided with a second conical hole, and the first connecting portion and the second connecting portion form an annular airflow groove along the middle connecting portion. The first connecting portion is provided with a transverse guide hole that passes through the second conical hole and is connected to the annular airflow groove; the first connecting block is fitted with the second connecting block, and the large end of the second conical hole is connected to the large end of the first conical hole. The electrode wire passes through the second conical hole and the first conical hole and moves. The airflow regulating valve operates so that the airflow flows into the second conical hole and the first conical hole in sequence along the regulating valve mounting hole, the annular airflow groove, and the transverse guide hole and is discharged along the small end of the first conical hole, so as to guide the tail electrode wire. Specifically, this device is installed at the tail of the wire-feeding device and is a structure that was not originally on the machine tool. It solves the drainage processing problem and guides the tail electrode wire, avoiding poor wire running, frequent wire breakage, and machine shutdown due to electrode wire entanglement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A perspective view of the present invention;

[0022] Figure 2 is a cross-sectional view of the present invention;

[0023] Figure 3 is another cross-sectional view of the present invention;

[0024] Figure 4 It is a three-dimensional diagram of the airflow guide wire structure;

[0025] Figure 5 It is a partial stereoscopic diagram of the airflow guide wire structure;

[0026] Figure 6 Another partial stereoscopic view of the airflow guide wire structure;

[0027] Figure 7 is a perspective view of the second connecting block;

[0028] Figure 8 is a three-dimensional diagram of the first connecting block;

[0029] Figure 9 is another perspective view of the first connecting block;

[0030] Figure 10 is a perspective view of the side fixing assembly;

[0031] Figure 11 This is another structural diagram of the side fixing assembly.

[0032] In the figure: 10, side fixing assembly; 11, sleeve portion; 111, through hole; 112, air flow control valve mounting hole; 12, side fixing portion; 121, strip fixing hole; 200, air flow guide structure; 20, first connecting block; 21, first tapered hole; 211, first arc chamfer; 30, second connecting block; 31, first connecting portion; 310, tapered hole end face line; 311, second tapered hole; 312, transverse guide hole; 32, middle connecting portion; 320, annular air flow groove; 33, second connecting portion. DETAILED DESCRIPTION

[0033] Below, the invention is further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, under the premise of no conflict, the various embodiments described below or the various technical features can be arbitrarily combined to form a new embodiment. Unless otherwise specified, the materials and equipment used in this embodiment can be purchased from the market. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0034] In the description of this application, it should be understood that the terms "upper," "lower," "front," "back," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting this application. In the description of this application, "plurality" means two or more, unless otherwise specifically specified.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "connected," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a fixed connection, a connection through an intermediary medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0036] The terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or sequential sequence. In addition, the terms "including," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to the process, method, product, or apparatus.

[0037] like Figure 1-11 As shown, an airflow wire guide device for ultra-fine electrode wire feeding of a slow-moving wire machine tool comprises a side fixing component 10 and an airflow wire guide structure 200. The side fixing component 10 is provided with a through hole 111 running through the left and right sides, and a regulating valve mounting hole 112 connected with the through hole 111, and an airflow regulating valve is installed at the regulating valve mounting hole 112; the airflow wire guide structure 200 comprises a first connecting block 20 and a second connecting block 30, the first connecting block 20 is provided with a first tapered hole 21, the second connecting block 30 comprises a first connecting portion 31, a middle connecting portion 32, and a second connecting portion 33 connected in sequence, the first connecting portion 31 is provided with a second tapered hole 311, the first connecting portion 31 and the second connecting portion 33 are connected in sequence, An annular airflow groove 320 is formed along the middle connecting portion 32. A transverse guide hole 312 is provided on the first connecting portion 31, passing through the second tapered hole 311 and communicating with the annular airflow groove 320. The first connecting block 20 is fitted with the second connecting block 30, and the large end of the second tapered hole 311 is connected to the large end of the first tapered hole 21. The electrode wire passes through the second tapered hole 311 and the first tapered hole 21 and moves. The airflow regulating valve operates, causing the airflow to flow into the second tapered hole 311 and the first tapered hole 21 in sequence along the regulating valve mounting hole 112, the annular airflow groove 320, and the transverse guide hole 312, and then be discharged along the small end of the first tapered hole 21, thereby guiding the tail electrode wire. Specifically, this device is installed at the tail of the wire feeding device and is a structure not originally found on the machine tool. It solves the drainage problem and guides the tail electrode wire, preventing poor wire feeding, frequent wire breakage, and machine shutdown caused by wire entanglement.

[0038] In the first aspect of the present invention, as a preferred embodiment, the second tapered hole 311 forms a tapered hole end face line 310 along the end face of the first connecting portion 31, and the transverse guide hole 312 passes through the tapered hole end face line 310. This device is primarily designed for wires thinner than 0.1 mm. It can smoothly use 0.07 mm electrode wire on a wire-cutting machine originally configured with 0.25 mm electrode wire, eliminating the high cost of purchasing additional equipment. However, it is also applicable to electrode wires of other specifications.

[0039] In the first aspect of the present invention, as a preferred embodiment, the number of the transverse guide holes 312 is 2-6. Specifically, in this embodiment, the number of the transverse guide holes 312 is 4, and the 4 transverse guide holes 312 are evenly distributed around the second tapered hole 311.

[0040] In the first aspect of the present invention, as a preferred embodiment, the maximum diameter of the first tapered hole 21 is greater than or equal to the maximum diameter of the second tapered hole 311, which further improves the guiding effect.

[0041] In the first aspect of the present invention, as a preferred embodiment, the side fixing assembly 10 includes a sleeve portion 11 and a side fixing portion 12. The side fixing portion 12 is connected to the side of the sleeve portion 11. The through hole 111 and the regulating valve mounting hole 112 are located in the sleeve portion 11. The side fixing portion 12 is provided with strip-shaped fixing holes 121 along its length, facilitating assembly and disassembly.

[0042] In the first aspect of the present invention, as a preferred embodiment, the first tapered hole 21 is provided with a first arcuate chamfer 211 along its end surface. Specifically, in the prior art, a pneumatic cylinder is used to control a clamping block to clamp the wire electrode, thereby stabilizing the wire electrode. The device in this application utilizes airflow to guide the wire electrode, resulting in an ingenious and simple structural design.

[0043] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. An airflow wire guide device for transporting ultra-fine electrode wire in a wire-cutting machine tool, characterized in that: It includes a side fixing component and an airflow guide wire structure. The side fixing component is provided with a through hole running through the left and right sides, and a regulating valve mounting hole connected with the through hole. An airflow regulating valve is installed at the regulating valve mounting hole. The airflow guide wire structure includes a first connecting block and a second connecting block, the first connecting block is provided with a first tapered hole, the second connecting block includes a first connecting portion, a middle connecting portion, and a second connecting portion connected in sequence, the first connecting portion is provided with a second tapered hole, the first connecting portion and the second connecting portion form an annular airflow groove along the middle connecting portion, and the first connecting portion is provided with a transverse guide hole that passes through the second tapered hole and communicates with the annular airflow groove; The first connecting block is fitted with the second connecting block, the large end of the second tapered hole is connected to the large end of the first tapered hole, the electrode wire passes through the second tapered hole and the first tapered hole and moves, and the airflow regulating valve operates to make the airflow flow into the second tapered hole and the first tapered hole in sequence along the regulating valve mounting hole, the annular airflow groove, and the transverse guide hole and be discharged along the small end of the first tapered hole, so as to guide the tail electrode wire.

2. The airflow wire guiding device for transporting ultra-fine electrode wire in a wire-cutting machine tool according to claim 1, characterized in that: The second tapered hole forms a tapered hole end surface line along the end surface of the first connecting portion, and the transverse guide hole passes through the tapered hole end surface line.

3. The airflow wire guiding device for conveying ultra-fine electrode wire in a wire-cutting machine tool according to claim 2, characterized in that: The number of the transverse guide holes is 2-6.

4. The airflow wire guiding device for conveying ultra-fine electrode wire in a wire-cutting machine tool according to claim 3, characterized in that: The number of the transverse guide holes is 4, and the 4 transverse guide holes are evenly distributed around the second tapered hole.

5. The airflow wire guiding device for transporting ultra-fine electrode wire in a wire-cutting machine tool according to claim 1, characterized in that: The maximum diameter of the first tapered hole is greater than or equal to the maximum diameter of the second tapered hole.

6. The airflow wire guiding device for conveying ultra-fine electrode wire in a wire-cutting machine tool according to claim 1, characterized in that: The side fixing assembly includes a sleeve portion and a side fixing portion, and the side fixing portion is connected to the side of the sleeve portion.

7. The airflow wire guiding device for conveying ultra-fine electrode wire in a wire-cutting machine tool according to claim 6, characterized in that: The regulating valve mounting hole and the through hole are located in the sleeve portion.

8. The airflow wire guiding device for transporting ultra-fine electrode wire in a wire-cutting machine tool according to claim 6, characterized in that: The side fixing portion is provided with a strip-shaped fixing hole along the length direction.

9. The airflow wire guiding device for transporting ultra-fine electrode wire in a wire-cutting machine tool according to claim 1, characterized in that: The first tapered hole is provided with a first arc-shaped chamfer along the end surface.

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