Wire cutting equipment with automatic wire threading function

Abstract

The invention discloses automatic wire threading linear cutting equipment which is characterized in that the automatic wire threading linear cutting equipment comprises a machine tool, a wire head fixing unit, a tensioning unit, a wire threading unit and a wire feeding unit are arranged on the machine tool, the automatic wire threading linear cutting equipment is reasonable in structural design, and the wire head fixing unit is used for clamping and fixing a wire head of an electrode wire; the tensioning unit is arranged and used for tensioning the electrode wire on the machine tool; the detection unit is arranged, when the electrode wire makes contact with the detection unit, the electrode wire generates an electric loop, and the tensioning unit does not conduct tensioning work; when the electrode wire does not make contact with the detection unit, the electrode wire does not generate an electric loop, and the tensioning unit conducts tensioning work. The wire threading unit is arranged, so that the wire threading work of the electrode wire is achieved; the wire feeding unit is arranged, so that the electrode wire returns to the wire head fixing unit through the wire feeding unit after being cut through the wire penetrating unit; due to the design, wire threading and wire feeding can be carried out without manual operation, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of wire cutting equipment, in particular to a wire cutting equipment with automatic wire threading. Background Art

[0002] CNC wire cutting is a branch of EDM, which uses electrode wire to cut the workpiece by spark discharge. In CNC wire cutting, the relative movement of the workpiece and the electrode wire is controlled by digital information, and it is often used to process high-hardness materials, fine structures, complex shapes, high-precision dimensional parts, and high-surface quality parts. The influence of the electrode wire tension stability on the processing quality is an aspect that cannot be ignored. To ensure the processing quality, the tension of the electrode wire must be kept at an appropriate level throughout the processing process. The tension on the electrode wire is caused by the elastic deformation of the electrode wire in the length direction. The greater the deformation, the longer the electrode wire length, the smaller the tension generated, which will affect the processing. Before processing the corresponding workpiece, the electrode wire needs to be inserted into the wire threading hole of the processing device and wound. However, the diameter of the wire threading hole of the current processing device is often small, which is difficult to insert by hand and takes a long time, which seriously affects the production efficiency. At present, all CNC wire cutting machines require manual wire threading, which requires professional personnel to operate and is a complicated process. During the wire cutting process, if other cuts need to be made on the same workpiece, staff are required to be on duty and wait for one position to be cut before manually threading the wire and completing the next round of cutting. The production efficiency is low and the processing cost is high. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a wire cutting device with automatic wire threading in view of the current status of the prior art.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: A wire cutting device with automatic wire threading comprises a machine tool, on which a wire head fixing unit, a tensioning unit, a wire threading unit and a wire feeding unit are arranged; the wire head fixing unit is used to automatically clamp the wire head of the electrode wire, and then the electrode wire enters the tensioning unit from the wire head fixing unit; the tensioning unit is provided with a detection unit for detecting whether the electrode wire generates an electrical circuit, and then the electrode wire enters the wire threading unit after being tensioned by the tensioning unit; the wire threading unit is used to thread the electrode wire, and the electrode wire enters the wire feeding unit after being threaded by the wire threading unit; the wire feeding unit is used to transport the electrode wire, and the electrode wire returns to the wire head fixing unit after being transported by the wire feeding unit.

[0005] The effects achieved by the above components are: a wire head fixing unit is provided to clamp and fix the wire head of the electrode wire; a tensioning unit is provided to tension the electrode wire on the machine tool; a detection unit is provided, when the electrode wire contacts the detection unit, an electrical circuit is generated in the electrode wire, and the tensioning unit does not perform tensioning work; when the electrode wire does not contact the detection unit, the electrode wire does not generate an electrical circuit, and the tensioning unit performs tensioning work; a wire threading unit is provided to thread the electrode wire; a wire feeding unit is provided, so that the electrode wire passes through the wire threading unit for cutting and then returns to the wire head fixing unit through the wire feeding unit; such a design allows wire threading and feeding to be performed without manual operation, thereby improving work efficiency.

[0006] Preferably, the tensioning unit includes: a guide rail unit, a sliding unit, a base plate and a detection unit; the detection unit is arranged on the base plate; one end of the guide rail unit is fixedly connected to the base plate; the sliding unit is slidably arranged on the guide rail unit; guide wire parts are arranged on the sliding unit and the base plate; when the electrode wire does not contact the detection unit, the sliding unit will slide on the guide rail unit to move away from the base plate, and the electrode wire arranged on the guide wire part will be tensioned.

[0007] The effects achieved by the above components are as follows: a tensioning unit is arranged on the machine tool to tighten the electrode wire; a sliding unit and a guide rail unit are arranged so that the sliding unit can slide on the guide rail unit; a wire guide portion is arranged to fix the electrode wire on the wire guide portion. Such a design can provide a stable tensioning force, so that when the external force changes, the sliding unit slides to keep the tensioning force of the electrode wire constant, thereby improving the machining accuracy of wire cutting and controlling the surface roughness of the machined workpiece, greatly improving the service life of the electrode wire.

[0008] Preferably, the wire threading unit includes a fixing module, a disassembly module, a wire guiding module and a wire feeding module, the fixing module is arranged at the end of the wire feeding module; the disassembly module is detachably connected to any side of the fixing module; the wire guiding module is arranged on the outside of the fixing module and the disassembly module; a wire feeding channel connecting the wire guiding module and the wire feeding module is arranged in the fixing module and the disassembly module; the electrode wire passes through the wire guiding module and the wire feeding channel and then enters the wire feeding module.

[0009] The effects achieved by the above components are: a wire threading unit is provided for threading and feeding the electrode wire; a fixing module and a disassembly module are provided, and a wire feeding channel is arranged between the fixing module and the disassembly module for feeding the electrode wire; the fixing module and the disassembly module are detachably connected, which is convenient for users to disassemble, clean or repair when the wire feeding channel is blocked; a wire guide module is provided to feed the wire; through the combination of four independent modules, the function of wire cutting assisted wire threading is realized, the structure is simple, and maintenance and disassembly are convenient, which well solves the problem of cleaning and maintenance of the electrode wire path in long-term use.

[0010] Preferably, the wire head fixing unit includes a wire barrel unit, a lower top mechanism unit, a servo drive unit, and a wire feeding tube; the lower top mechanism unit is arranged on either side of the wire barrel unit; the servo drive unit is arranged on the outside of the wire barrel unit, and the servo drive unit drives the wire barrel unit to rotate; an arc-shaped pressing plate is arranged under the wire barrel unit; the wire barrel unit is rotated to a suitable angle by the servo drive unit, and the lower top mechanism unit presses down on the arc-shaped pressing plate to form a gap between the arc-shaped pressing plate and the wire barrel unit, and after the electrode wire enters the gap through the wire feeding tube, the lower top mechanism unit and the arc-shaped pressing plate are reset to clamp the electrode wire between the arc-shaped pressing plate and the wire barrel unit.

[0011] The effects achieved by the above components are as follows: a wire head fixing unit is provided for wire winding, a lower top mechanism unit and an arc-shaped pressing sheet are provided for fixing the wire head of the electrode wire on the wire barrel unit, a servo drive unit drives the wire barrel unit to work, and a wire feeding tube is provided for transmitting the electrode wire; a lower top mechanism unit and an arc-shaped pressing sheet are provided for cooperation, so that the electrode wire can be routed in the gap formed between the arc-shaped pressing sheet and the wire barrel unit by rotating the wire barrel, and then the arc-shaped pressing sheet and the lower top mechanism unit are reset, and the electrode wire will be fixed on the wire barrel unit by the clamping force between the arc-shaped pressing sheet and the wire barrel unit; such a design enables the wire head of the electrode wire to be automatically clamped and fixed, without the need for manual fixing operation of the electrode wire, thereby improving the work efficiency of workers, avoiding high-intensity manual operation, and being able to effectively maintain the integrity of the wire head so that it can be repeatedly fixed multiple times, avoiding the trouble of trimming after each fixation.

[0012] Preferably, the wire threading unit includes a box unit, a lifting mechanism unit, and a driving wire loosening mechanism unit; the driving wire loosening mechanism unit is arranged in the box unit; a slide rail unit and a wire guide unit are arranged on the lifting mechanism unit; the lifting mechanism unit is connected with the box unit through the slide rail unit; the driving wire loosening mechanism unit is arranged with an eye mold unit, an electrode wire driving box and an electrode wire driving motor; the electrode wire driving motor is drivingly connected to the electrode wire driving box; an electrode wire movement channel is arranged between the eye mold unit and the electrode wire driving box; the driving wire loosening mechanism unit and the box unit slide relative to the lifting mechanism unit through the slide rail unit, the electrode wire enters the electrode wire movement channel through the wire guide unit and the eye mold unit, and the electrode wire driving motor drives the electrode wire driving box to move the electrode wire in the electrode wire movement channel.

[0013] The effects achieved by the above components are: by setting up a wire threading unit for threading the electrode wire, a box unit is set for fixing and placing the driving wire clamping and loosening mechanism unit; by setting up a lifting mechanism unit for limiting the movement of the box unit and the driving wire clamping and loosening mechanism unit; by setting up a slide rail unit for limiting the sliding of the box unit; by setting up a wire guiding unit for guiding the electrode wire; by setting up an eye mold unit for receiving the electrode wire conducted from the wire guiding unit; by setting up an electrode wire driving box, an electrode wire driving motor and an electrode wire movement channel, the electrode wire is threaded; this structure has a high degree of automation and a stable structure, and can be installed on an existing manual wire threading wire cutting machine to perform wire threading, which can not only save the cost of replacing the entire machine, but also achieve the purpose of high-efficiency automatic wire threading, and also avoid the waste of resources caused by the elimination of manual wire threading wire cutting machines.

[0014] Preferably, a cylinder unit is arranged on the base plate; one end of the cylinder unit is in conflict with the sliding unit; the cylinder unit pushes the sliding unit to perform limited sliding on the guide rail unit; and an encoder unit is arranged on the tensioning unit.

[0015] The effects achieved by the above components are: a cylinder unit is provided to push the sliding unit; an encoder unit is provided to detect whether the electrode wire is blocked in the wire threading unit, thereby preventing the wire feeding work from being carried out continuously and affecting the use of the machine tool.

[0016] Preferably, a wire guide seat is arranged on the wire guide module; an upper arm frame that can be opened or closed is arranged on the wire guide seat; when the upper arm frame is closed, a wire guide channel is formed to communicate with the wire feeding channel.

[0017] The effects achieved by the above components are: a wire guide seat is provided for guiding the wire; an upper arm that can be opened or closed is provided; waste is prevented from clogging the wire guide module and affecting the wire guiding work of the wire guide module.

[0018] Preferably, a wire feeding module is arranged with a wire tube unit; the wire feeding tube unit includes an inner tube, an outer tube, a protective cover and a guide tube; the protective cover is arranged at the connection between the outer tube and the wire feeding channel; the outer tube is arranged on the outside of the inner tube; the guide tube is arranged at the other end of the outer tube away from the protective cover; the protective cover and the inner tube are made of insulating materials; the guide tube is made of conductive material.

[0019] The effects achieved by the above components are: an inner tube is provided for wire feeding, an outer tube is provided for protecting the inner tube; a protective cover is provided for protecting the electrode wire, and a guide tube is provided for receiving electrical circuit signals; the protective cover and the inner tube are provided as insulating materials to prevent the generation of electrical circuits.

[0020] Preferably, a water tank is arranged outside the machine tool; and a water pipe connected to the wire threading unit and / or the wire feeding unit is arranged on the water tank.

[0021] The effect achieved by the above components is: by setting up a water tank and a water pipe, the wire threading unit and / or the wire feeding unit are flushed to prevent blockage.

[0022] Preferably, an electric control unit is arranged on the machine tool; the electric control unit is electrically connected to the wire head fixing unit, the tensioning unit, the wire threading unit, and the wire feeding unit.

[0023] The effect achieved by the above components is: by setting up the electronic control unit, the machine tool can be fully automatically controlled.

[0024] Compared with the prior art, the advantages of the present invention are: a wire head fixing unit is provided to clamp and fix the wire head of the electrode wire; a tensioning unit is provided to tension the electrode wire on the machine tool; a detection unit is provided, when the electrode wire contacts the detection unit, an electrical circuit is generated in the electrode wire, and the tensioning unit does not perform tensioning work; when the electrode wire does not contact the detection unit, the electrode wire does not generate an electrical circuit, and the tensioning unit performs tensioning work; a wire threading unit is provided to thread the electrode wire; a wire feeding unit is provided, so that the electrode wire passes through the wire threading unit for cutting and then returns to the wire head fixing unit through the wire feeding unit; such a design allows wire threading and feeding to be performed without manual operation, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the structure of the wire head fixing unit of the present invention; Figure 3 It is a schematic cross-sectional view of the structure of the wire head fixing unit of the present invention; Figure 4 It is a front schematic diagram of the tensioning unit structure of the present invention; Figure 5 It is a schematic diagram of the reverse side of the tensioning unit structure of the present invention; Figure 6 It is a front schematic diagram of the wire threading unit structure of the present invention; Figure 7 It is a schematic diagram of the reverse side of the wire threading unit structure of the present invention; Figure 8 It is a schematic diagram of the structure of the wire feeding unit of the present invention; Fig. 9 It is a schematic cross-sectional view of the structure of the wire tube unit of the present invention.

[0026] Figure numerals: 1, machine tool; 11, water tank; 12, electronic control unit; 2, wire head fixing unit; 21, wire barrel unit; 22, lower push mechanism unit; 23, servo drive unit; 24, wire feeding tube; 25, arc-shaped pressing piece; 3, tensioning unit; 31, detection unit; 32, guide rail unit; 33, sliding unit; 34, base plate; 35, wire guide unit; 36, cylinder unit; 37, encoder unit; 4, wire feeding unit; 41, fixing module; 4 2. Disassembly module; 43. Wire guide module; 44. Wire feeding module; 45. Wire guide seat; 46. Upper arm; 5. Wire threading unit; 51. Box unit; 52. Lifting mechanism unit; 53. Drive clamping and loosening wire mechanism unit; 54. Slide rail unit; 55. Wire guide unit; 56. Eye mold unit; 57. Electrode wire drive box; 58. Electrode wire drive motor; 6. Wire tube unit; 61. Inner tube; 62. Outer tube; 63. Protective cover; 64. Guide tube. DETAILED DESCRIPTION

[0027] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0028] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back... are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] Moreover, some of the above terms may be used to express other meanings besides indicating orientation or positional relationships. For example, the term "on" may also be used to indicate a certain dependency or connection relationship in certain cases. A person skilled in the art may understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0030] In addition, the terms "install", "set", "provided with", "connect", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. The connection methods involved in this article are prior arts, without any improvement, and are all common knowledge of those skilled in the art. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] like Figures 1 to 9 As shown, the present invention provides A wire cutting device with automatic wire threading comprises a machine tool 1, on which are arranged a wire head fixing unit 2, a tensioning unit 3, a wire threading unit 5, and a wire feeding unit 4; the wire head fixing unit 2 is used to automatically clamp the wire head of the electrode wire, and then the electrode wire enters the tensioning unit 3 from the wire head fixing unit 2; the tensioning unit 3 is provided with a detection unit 31 for detecting whether the electrode wire generates an electrical circuit, and then the electrode wire enters the wire threading unit 5 after being tensioned by the tensioning unit 3; the wire threading unit 5 is used to thread the electrode wire, and the electrode wire enters the wire feeding unit 4 after being threaded by the wire threading unit 5; the wire feeding unit 4 is used to transport the electrode wire, and the electrode wire returns to the wire head fixing unit 2 after being transported by the wire feeding unit 4. A wire head fixing unit 2 is provided to clamp and fix the wire head of the electrode wire; a tensioning unit 3 is provided to tension the electrode wire on the machine tool 1; a detection unit 31 is provided, when the electrode wire contacts the detection unit 31, an electrical circuit is generated in the electrode wire, and the tensioning unit 3 does not perform tensioning work; when the electrode wire does not contact the detection unit 31, the electrode wire does not generate an electrical circuit, and the tensioning unit 3 performs tensioning work; a wire threading unit 5 is provided to thread the electrode wire; a wire feeding unit 4 is provided, so that after the electrode wire passes through the wire threading unit 5 for cutting, it returns to the wire head fixing unit 2 through the wire feeding unit 4; such a design allows wire threading and feeding to be performed without manual operation, thereby improving work efficiency.

[0033] The tensioning unit 3 includes: a guide rail unit 32, a sliding unit 33, a base plate 34 and a detection unit 31; the detection unit 31 is arranged on the base plate 34; one end of the guide rail unit 32 is fixedly connected to the base plate 34; the sliding unit 33 is slidably arranged on the guide rail unit 32; a wire guide portion 35 is arranged on both the sliding unit 33 and the base plate 34; when the electrode wire does not contact the detection unit 31, the sliding unit 33 will slide on the guide rail unit 32 to move away from the base plate 34, and the electrode wire arranged on the wire guide portion 35 will be tensioned. A tensioning unit 3 is provided on the machine tool 1 to tension the electrode wire; a sliding unit 33 and a guide rail unit 32 are provided so that the sliding unit 33 can slide on the guide rail unit 32; a wire guide portion 35 is provided to fix the electrode wire on the wire guide portion 35. Such a design can provide a stable tensioning force, so that when the external force changes, the sliding unit 33 slides to keep the tensioning force of the electrode wire constant, thereby improving the machining accuracy of wire cutting and controlling the surface roughness of the machined workpiece, and greatly improving the service life of the electrode wire.

[0034] The wire threading unit 5 includes a fixing module 41, a disassembly module 42, a wire guiding module 43 and a wire feeding module 44, wherein the fixing module 41 is arranged at the end of the wire feeding module 44; the disassembly module 42 is detachably connected to any side of the fixing module 41; the wire guiding module 43 is arranged on the outside of the fixing module 41 and the disassembly module 42; a wire feeding channel connecting the wire guiding module 43 and the wire feeding module 44 is arranged in the fixing module 41 and the disassembly module 42; the electrode wire passes through the wire guiding module 43 and the wire feeding channel and then enters the wire feeding module 44. A wire threading unit 5 is provided for threading and feeding the electrode wire; a fixing module 41 and a disassembly module 42 are provided, and a wire feeding channel is arranged between the fixing module 41 and the disassembly module 42 for feeding the electrode wire; the fixing module 41 and the disassembly module 42 are detachably connected, so that when the wire feeding channel is blocked, it is convenient for the user to disassemble, clean or repair; a wire guide module 43 is provided for feeding the wire; the function of wire cutting auxiliary wire threading is realized by combining four independent modules, the structure is simple, and the maintenance and disassembly is convenient, which well solves the problem of cleaning and maintenance of the electrode wire path in long-term use.

[0035] The wire head fixing unit 2 includes a wire barrel unit 21, a lower top mechanism unit 22, a servo drive unit 23, and a wire feeding tube 24; the lower top mechanism unit 22 is arranged on either side of the wire barrel unit 21; the servo drive unit 23 is arranged on the outside of the wire barrel unit 21, and the servo drive unit 23 drives the wire barrel unit 21 to rotate; an arc-shaped pressing sheet 25 is arranged below the wire barrel unit 21; the wire barrel unit 21 is rotated to a suitable angle through the servo drive unit 23, and the lower top mechanism unit 22 presses down on the arc-shaped pressing sheet 25 to form a gap between the arc-shaped pressing sheet 25 and the wire barrel unit 21, and after the electrode wire enters the gap through the wire feeding tube 24, the lower top mechanism unit 22 and the arc-shaped pressing sheet 25 are reset to clamp the electrode wire between the arc-shaped pressing sheet 25 and the wire barrel unit 21. A wire head fixing unit 2 is provided for wire winding, a lower top mechanism unit 22 and an arc-shaped pressing sheet 25 are provided for fixing the wire head of the electrode wire on the wire barrel unit 21, a servo drive unit 23 drives the wire barrel unit 21 to work, and a wire feeding tube 24 is provided for transmitting the electrode wire; the lower top mechanism unit 22 and the arc-shaped pressing sheet 25 are provided to cooperate with each other, so that the electrode wire can be routed in the gap formed between the arc-shaped pressing sheet 25 and the wire barrel unit 21 by rotating the wire barrel, and then the arc-shaped pressing sheet 25 and the lower top mechanism unit 22 are reset, and the electrode wire will be fixed on the wire barrel unit 21 by the clamping force between the arc-shaped pressing sheet 25 and the wire barrel unit 21; such a design enables the wire head of the electrode wire to be automatically clamped and fixed, without the need for manual fixing operation of the electrode wire, thereby improving the work efficiency of workers, avoiding high-intensity manual operation, and being able to effectively maintain the integrity of the wire head so that it can be repeatedly fixed multiple times, avoiding the trouble of trimming once fixed.

[0036] The wire threading unit 5 includes a box unit 51, a lifting mechanism unit 52, and a driving wire loosening mechanism unit 53; the driving wire loosening mechanism unit 53 is arranged in the box unit 51; a slide rail unit 54 and a wire guide unit 55 are arranged on the lifting mechanism unit 52; the lifting mechanism unit 52 is connected to the box unit 51 through the slide rail unit 54; an eye mold unit 56, an electrode wire driving box 57 and an electrode wire driving motor 58 are arranged in the driving wire loosening mechanism unit 53; the electrode wire driving motor 58 is drivingly connected to the electrode wire driving box 57; an electrode wire movement channel is arranged between the eye mold unit 56 and the electrode wire driving box 57; the driving wire loosening mechanism unit 53 and the box unit 51 slide relative to the lifting mechanism unit 52 through the slide rail unit 54, and the electrode wire enters the electrode wire movement channel through the wire guide unit 55 and the eye mold unit 56, and the electrode wire driving motor 58 drives the electrode wire driving box 57 to move the electrode wire in the electrode wire movement channel. A wire threading unit 5 is provided for threading the electrode wire, a box unit 51 is provided for fixing and placing the driving wire clamping and loosening mechanism unit 53; a lifting mechanism unit 52 is provided for limiting the movement of the box unit 51 and the driving wire clamping and loosening mechanism unit 53; a slide rail unit 54 is provided for limiting the sliding of the box unit 51; a wire guide unit 55 is provided for guiding the electrode wire; an eye mold unit 56 is provided for receiving the electrode wire conducted from the wire guide unit 55; an electrode wire drive box 57, an electrode wire drive motor 58 and an electrode wire movement channel are provided for threading the electrode wire; the structure has a high degree of automation and a stable structure, and can be installed on the existing manual wire threading wire cutting machine 1 for threading, which can save the cost of replacing the entire machine and achieve the purpose of efficient automatic threading, while also avoiding the waste of resources caused by the elimination of the manual wire threading wire cutting machine 1.

[0037] The base plate 34 is provided with a cylinder unit 36; one end of the cylinder unit 36 ​​contacts the sliding unit 33; the cylinder unit 36 ​​pushes the sliding unit 33 to slide on the guide rail unit 32; the tensioning unit 3 is provided with an encoder unit 37. The cylinder unit 36 ​​is provided to push the sliding unit 33; the encoder unit 37 is provided to detect whether the electrode wire is blocked in the wire threading unit 5, so as to prevent the wire feeding from being carried out all the time and affecting the use of the machine tool 1.

[0038] The wire guide module 43 is provided with a wire guide seat 45; the wire guide seat 45 is provided with an upper arm 46 that can be opened or closed; when the upper arm 46 is closed, a wire guide channel is formed and is connected to the wire feeding channel. The wire guide seat 45 is provided for guiding the wire; the upper arm 46 that can be opened or closed is provided to prevent waste from blocking the wire guide module 43 and affecting the wire guiding work of the wire guide module 43.

[0039] The wire feeding module 44 is provided with a wire passing tube unit 6; the wire passing tube unit 6 includes an inner tube 61, an outer tube 62, a protective sleeve 63, and a guide tube 64; the protective sleeve 63 is provided at the connection between the outer tube 62 and the wire feeding channel; the outer tube 62 is provided outside the inner tube 61; the guide tube 64 is provided at the other end of the outer tube 62 away from the protective sleeve 63; the protective sleeve 63 and the inner tube 61 are made of insulating materials; the guide tube 64 is made of conductive materials. The inner tube 61 is provided for wire feeding, and the outer tube 62 is provided for protecting the inner tube 61; the protective sleeve 63 is provided for protecting the electrode wire, and the guide tube 64 is provided for receiving the electric circuit signal; the protective sleeve 63 and the inner tube 61 are provided as insulating materials, so as to prevent the generation of an electric circuit.

[0040] A water tank 11 is arranged outside the machine tool 1; a water pipe connected to the wire threading unit 5 and / or the wire feeding unit 4 is arranged on the water tank 11. The water tank 11 and the water pipe are provided to flush the wire threading unit 5 and / or the wire feeding unit 4 to prevent blockage.

[0041] The machine tool 1 is provided with an electric control unit 12, which is electrically connected to the wire head fixing unit 2, the tensioning unit 3, the wire threading unit 5, and the wire feeding unit 4. By providing the electric control unit 12, the machine tool 1 is fully automatically controlled. Specific embodiment 1:

[0042] The servo drive unit 23 drives the wire barrel unit 21 to rotate to a set angle so that one end of the lower top mechanism unit 22 is aligned with the wire barrel unit 21. At this time, the lower top mechanism unit 22 is opened. Since the lower top mechanism unit 22 moves downward, the arc pressure sheet 25 also moves downward and forms a gap of a certain size between it and the wire barrel unit 21. When the electrode wire spit out of the wire feeding tube 24 enters this gap, the lower top mechanism unit 22 is closed. After the lower top mechanism unit 22 is reset upward, the force acting on the lower top mechanism unit 22 is cancelled, and the lower top mechanism unit 22 moves upward, driving the arc pressure sheet 25 to move upward until the gap between the arc pressure sheet 25 and the wire barrel unit 21 disappears, and the end of the electrode wire is clamped and fixed by the pressure between the arc pressure sheet 25 and the wire barrel unit 21, thereby achieving a fixing effect on the end of the electrode wire. Specific embodiment 2:

[0043] When the electrode wire does not contact the detection unit 31, an electrical circuit is not formed, and the cylinder unit 36 ​​will push the sliding unit 33. At this time, the sliding unit 33 will slide on the guide rail unit 32, and the distance between the base plate 34 and the sliding unit 33 will increase. At this time, the electrode wire arranged on the wire guide part 35 will be tensioned, and then the electrode wire will contact the detection unit 31 to form an electrical circuit, and the tensioning unit 3 will stop the tensioning work. Specific embodiment 3:

[0044] After the electrode wire passes through the tensioning unit 3 and enters the wire feeding unit 4, the wire clamping mechanism unit 53 and the box unit 51 are driven to slide relative to the lifting mechanism unit 52 through the slide rail unit 54, and the electrode wire enters the electrode wire movement channel through the wire guide unit 55 and the eye mold unit 56. The electrode wire driving motor 58 drives the electrode wire driving box 57 to move the electrode wire in the electrode wire movement channel. Specific embodiment 4:

[0045] When the electrode wire needs to be threaded, the electrode wire passes through the upper arm 46 and enters the wire feeding channel. Then the electrode wire will be transmitted in the wire feeding channel and then enter the inner tube 61.

[0046] The electronic control unit 12 described in the present invention has a conventional and well-known structure and technology to those skilled in the art, so there is no need for excessive description and illustration.

[0047] The wire feeding channel and the wire guiding channel described in the present invention have been described in detail in the specification, so they are not marked in the accompanying drawings for your reference.

[0048] The electrode wire described in the present invention has a conventional and well-known structure and technology to those skilled in the art, so there is no need to elaborate on it.

[0049] The water pipe described in the present invention is a conventional and well-known structure and technology to those skilled in the art, so there is no need for excessive description and illustration.

[0050] In the description of this specification, reference is made to the terms "one embodiment", "some embodiments", "examples", "specific examples", etc. The description of "example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without contradiction.

[0051] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can all be customized according to the description in the specification and drawings. The specific connection methods of each part all adopt conventional means such as mature bolts, rivets, welding, and bonding in the prior art, which will not be described in detail here.

[0052] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, various changes and variations can be made in the specific implementation methods and application scopes based on the ideas of the present invention. The content of this specification should not be understood as limiting the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A wire cutting device with automatic wire threading, characterized in that: The invention comprises a machine tool, on which a wire head fixing unit, a tensioning unit, a wire threading unit and a wire feeding unit are arranged; the wire head fixing unit is used for automatically clamping the wire head of the electrode wire, and then the electrode wire enters the tensioning unit from the wire head fixing unit; the tensioning unit is provided with a detection unit for detecting whether the electrode wire generates an electrical circuit, and then the electrode wire enters the wire threading unit after being tensioned by the tensioning unit; the wire threading unit is used for threading the electrode wire, and the electrode wire enters the wire feeding unit after being threaded by the wire threading unit; the wire feeding unit is used for conveying the electrode wire, and the electrode wire returns to the wire head fixing unit after being conveyed by the wire feeding unit.

2. The automatic wire threading wire cutting device according to claim 1 is characterized in that: The tensioning unit includes: a guide rail unit, a sliding unit, a base plate and a detection unit; the detection unit is arranged on the base plate; one end of the guide rail unit is fixedly connected to the base plate; the sliding unit is slidably arranged on the guide rail unit; a wire guide portion is arranged on both the sliding unit and the base plate; when the electrode wire does not contact the detection unit, the sliding unit will slide on the guide rail unit to move away from the base plate, and the electrode wire arranged on the wire guide portion will be tensioned.

3. The automatic wire threading wire cutting device according to claim 1 is characterized in that: The wire threading unit includes a fixing module, a disassembly module, a wire guiding module and a wire feeding module, wherein the fixing module is arranged at the end of the wire feeding module; the disassembly module is detachably connected to any side of the fixing module; the wire guiding module is arranged on the outside of the fixing module and the disassembly module; a wire feeding channel connecting the wire guiding module and the wire feeding module is arranged in the fixing module and the disassembly module; the electrode wire passes through the wire guiding module and the wire feeding channel and then enters the wire feeding module.

4. The automatic wire threading wire cutting device according to claim 1, characterized in that: The wire head fixing unit includes a wire barrel unit, a lower top mechanism unit, a servo drive unit, and a wire feeding tube; the lower top mechanism unit is arranged on either side of the wire barrel unit; the servo drive unit is arranged on the outside of the wire barrel unit, and the servo drive unit drives the wire barrel unit to rotate; an arc-shaped pressing plate is arranged under the wire barrel unit; the wire barrel unit is rotated to a suitable angle by the servo drive unit, and the lower top mechanism unit presses down on the arc-shaped pressing plate to form a gap between the arc-shaped pressing plate and the wire barrel unit, and after the electrode wire enters the gap through the wire feeding tube, the lower top mechanism unit and the arc-shaped pressing plate are reset to clamp the electrode wire between the arc-shaped pressing plate and the wire barrel unit.

5. The automatic wire threading wire cutting device according to claim 1, characterized in that: The wire threading unit includes a box unit, a lifting mechanism unit, and a driving wire loosening mechanism unit; the driving wire loosening mechanism unit is arranged in the box unit; a slide rail unit and a wire guide unit are arranged on the lifting mechanism unit; the lifting mechanism unit is connected with the box unit through the slide rail unit; the driving wire loosening mechanism unit is arranged with an eye mold unit, an electrode wire driving box and an electrode wire driving motor; the electrode wire driving motor is drivingly connected to the electrode wire driving box; an electrode wire movement channel is arranged between the eye mold unit and the electrode wire driving box; the driving wire loosening mechanism unit and the box unit slide relative to the lifting mechanism unit through the slide rail unit, the electrode wire enters the electrode wire movement channel through the wire guide unit and the eye mold unit, and the electrode wire driving motor drives the electrode wire driving box to move the electrode wire in the electrode wire movement channel.

6. The automatic wire threading wire cutting device according to claim 2, characterized in that: A cylinder unit is arranged on the base plate; one end of the cylinder unit is in conflict with the sliding unit; the cylinder unit pushes the sliding unit to perform limited sliding on the guide rail unit; an encoder unit is arranged on the tensioning unit.

7. The automatic wire cutting device according to claim 3, characterized in that: The wire guide module is provided with a wire guide seat; the wire guide seat is provided with an upper arm frame which can be opened or closed; when the upper arm frame is closed, a wire guide channel is formed which is interconnected with the wire feeding channel.

8. The automatic wire threading wire cutting device according to claim 3, characterized in that: A wire feeding tube unit is arranged on the wire feeding module; the wire feeding tube unit includes an inner tube, an outer tube, a protective sleeve and a guide tube; the protective sleeve is arranged at the connection between the outer tube and the wire feeding channel; the outer tube is arranged on the outside of the inner tube; the guide tube is arranged at the other end of the outer tube away from the protective sleeve; the protective sleeve and the inner tube are made of insulating materials; the guide tube is made of conductive material.

9. The automatic wire cutting device according to any one of claims 1 to 8, characterized in that: A water tank is arranged outside the machine tool; a water pipe connected to the wire threading unit and / or the wire feeding unit is arranged on the water tank.

10. The automatic wire threading wire cutting device according to any one of claims 1 to 9, characterized in that: An electric control unit is arranged on the machine tool; the electric control unit is electrically connected to the wire head fixing unit, the tensioning unit, the wire threading unit and the wire feeding unit.

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