Wire sawing downframe wire feeding mechanism

Abstract

The present application belongs to the technical field of wire cutting equipment, and the wire cutting descending frame wire feeding mechanism is used for conveying metal cutting wire from a reversing device to a wire storage cylinder. The wire cutting descending frame wire feeding mechanism comprises a straight pipe assembly. One end of the straight pipe assembly is connected with the output end of the reversing device, and the other end of the straight pipe assembly is connected with the wire clamping interface of the wire storage cylinder. The wire clamping interface of the wire storage cylinder is an automatic opening and closing wire clamping mechanism. The straight pipe assembly is adopted. The two ends of the straight pipe assembly are respectively connected with the output end of the reversing device and the wire clamping interface of the wire storage cylinder. The single pipe structure is convenient for wire feeding. The power device is not needed to stretch and retract the pipe body. The cost is lower. The structure is simple and easy to use, and is basically maintenance-free.

Description

Technical Field

[0001] This invention belongs to the technical field of wire EDM equipment, and in particular to the wire feeding mechanism of the wire EDM downstand. Background Technology

[0002] Traditional wire EDM equipment uses metal wire as the cutting tool, and the metal wire needs to move during the cutting process. This movement is typically achieved using a wire feeding device and a wire spool.

[0003] During the wire threading process, wire cutting equipment generally uses a wire feeding mechanism to feed the wire. For example, Chinese patent: an automatic wire threading wire cutting device (publication number: CN116252009A) discloses a wire feeding mechanism that uses a multi-section pipe. This pipe requires a power structure to drive it to extend gradually to complete the wire feeding. Although this mechanical wire feeding mechanism can also complete the wire feeding, the structure is relatively complex, the assembly is difficult, and the subsequent maintenance is difficult due to the large number of parts. The manufacturing cost is also very high, and the probability of mechanism failure is high. Summary of the Invention

[0004] To address the aforementioned issues, this invention proposes a wire EDM down-mount wire feeding mechanism. This mechanism employs a single-tube structure for wire feeding, resulting in a simpler structure and more convenient wire knotting. During the wire feeding process, it accurately senses the position where the wire end is to be knotted before reaching the wire storage drum, thereby activating the wire storage drum clamping mechanism to prepare for wire knotting and ensuring the reliability of wire knotting.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a wire cutting downlift wire feeding mechanism, used to transport metal cutting wire from a reversing device to a wire storage drum. The wire cutting downlift wire feeding mechanism includes a straight tube assembly. One end of the straight tube assembly is connected to the output end of the reversing device, and the other end of the straight tube assembly is connected to the wire clamping interface of the wire storage drum. The wire clamping interface of the wire storage drum is an automatically opening and closing wire clamping mechanism.

[0006] Preferably, the straight tube assembly includes a wire feeding tube, an insulating connecting block, and a sensing tube, wherein the wire feeding tube and the sensing tube are connected through the insulating connecting block, and the axes of the wire feeding tube and the sensing tube coincide. The sensing tube is electrically insulated from the wire feeding tube, and the sensing tube faces the wire storage drum. The wire feeding tube is connected to the output end of the reversing device. A debris falling hole is provided at the lower part of the insulating connecting block. The debris falling hole is correspondingly opened on the path of the metal cutting wire moving in the insulating connecting block, and is located between the sensing tube and the wire feeding tube.

[0007] Preferably, the end of the sensing tube away from the insulating connecting block is provided with an outlet of a correction tube that corrects the direction of movement of the metal cutting wire by outputting gas.

[0008] Preferably, the front end of the insulating connecting block has a sensor tube mounting hole and a correction tube mounting hole for mounting the sensor tube and the correction tube, and the rear end of the insulating connecting block has a wire feeding tube mounting hole for mounting the wire feeding tube. The wire feeding tube mounting hole and the sensor tube mounting hole are coaxial. The insulating connecting block has a channel inside that connects the wire feeding tube mounting hole and the sensor tube mounting hole in a straight line. The insulating connecting block has a correction tube air hole, and the insulating connecting block has a channel inside that connects the correction tube air hole and the correction tube.

[0009] Preferably, the insulating connecting block is provided with a liquid blowing nozzle mounting hole that communicates with the debris falling hole. The liquid blowing nozzle mounting hole is used to forcefully blow off liquid dust and debris transmitted from the wire feeding tube along the path of the metal cutting wire via an external air pipe.

[0010] Preferably, the reversing device has a flared guide structure at the interface with the straight tube assembly, with the flared end of the guide structure facing the direction of the incoming metal cutting wire and the converging end facing the straight tube assembly.

[0011] Preferably, the reversing device has a built-in correction air channel, which is used to assist in the movement of the metal cutting wire toward one end of the straight tube assembly.

[0012] Preferably, there are two correction air channels, and the two correction air channels are symmetrically arranged on both sides of the end of the metal cutting wire conveying channel output by the reversing device.

[0013] The beneficial effects of the technical solution in this application are: 1. The wire feeding mechanism of the wire EDM lower frame adopts a straight tube assembly. The two ends of the straight tube assembly are respectively connected to the output end of the reversing device and the wire clamping interface of the wire storage drum. The single tube structure makes wire feeding convenient, eliminates the need for a power device to extend the tube body, reduces costs, and is simple and easy to use with minimal maintenance.

[0014] 2. The sensor tube can work with the detection module to detect the position of the wire feed. When the metal cutting wire is fed into place, it can detect the wire feed in place immediately, which facilitates the automatic wire knotting of the equipment.

[0015] 3. The insulating connecting block is provided with a debris drop hole and a corresponding pressurized gas interface. The pressurized gas is used to force the coolant and conductor debris on the metal cutting wire's path to be blown off through the debris drop hole. In other words, the liquid dust and debris transmitted from the wire feeding tube on the metal cutting wire's path are forcibly blown off, thereby improving the reliability of the wire connection.

[0016] 4. In the wire feeding mechanism of the wire cutting downframe, a pressure gas correction structure is set at both the front and rear ends of the straight tube assembly in the conveying direction. The pressure gas corrects the conveying direction of the metal cutting wire, making it easier for the metal cutting wire to be conveyed to the wire storage drum along the predetermined route. The reversing device is equipped with a guide structure to facilitate the introduction of the metal cutting wire into the wire feeding mechanism of the wire cutting downframe. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the wire feeding mechanism of the wire EDM lower frame of the present invention applied to a wire EDM equipment.

[0018] Figure 2 This is a schematic diagram of the wire feeding mechanism of the wire EDM lower frame.

[0019] Figure 3 This is a schematic diagram of the insulating connecting block from the axial side.

[0020] Figure 4 This is an axial side view of the insulating connecting block from another perspective.

[0021] Figure 5 This is a schematic diagram of the connection between the reversing device and the wire feeding mechanism of the wire EDM lower frame.

[0022] The reference numerals in the figures include: 10-Wire feeding device, 20-Wire receiving device, 30-Reversing device, 31-Guiding structure, 32-Correction air passage, 40-Wire feeding mechanism of wire EDM lower frame, 41-Wire feeding tube, 42-Insulating connecting block, 421-Induction tube mounting hole, 422-Correction tube mounting hole, 423-Correction tube fixing hole, 424-Correction tube air hole, 425-Induction tube fixing hole, 426-Liquid blowing nozzle mounting hole, 427-Wire feeding tube fixing hole, 428-Debris falling hole, 43-Induction tube, 44-Correction tube, 45-Installation base, 46-Fixing component, 50-Wire storage drum. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this technical solution clearer, the following detailed description, in conjunction with specific embodiments, further illustrates this technical solution. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of protection of this application.

[0024] like Figures 1-5As shown, this embodiment discloses a wire cutting downframe wire feeding mechanism 40. This wire cutting downframe wire feeding mechanism 40 is used on a wire cutting device. The wire cutting device is equipped with a wire feeding device 10. The wire feeding device 10 releases metal cutting wire during the preparation stage of the wire cutting device. A wire receiving device 20 is set directly below the wire feeding device 10. The wire receiving device 20 receives the metal cutting wire and feeds the metal cutting wire into a reversing device 30. After being reversed by the reversing device 30, the metal cutting wire passes through the wire cutting downframe wire feeding mechanism 40. The end of the metal cutting wire is connected to the wire clamping interface of the wire storage drum 50. The wire clamping interface of the wire storage drum 50 is an automatically opening and closing wire clamping mechanism. After clamping the end of the metal cutting wire, the wire storage drum 50 performs wire knotting operation.

[0025] In the above process, the main function of the wire cutting downframe feeding mechanism 40 is to realize the wire feeding of the metal cutting wire, that is, to automatically complete the wire feeding, movement and docking with the lower wire storage cylinder 50.

[0026] like Figure 2 As shown, the wire feeding mechanism 40 of the wire EDM lower frame is mounted on a C-shaped mounting base 45. The mounting base 45 has a lateral opening, and five fasteners 46 are spaced apart within its interior space. These fasteners 46 securely fix the wire feeding tube 41, ensuring it is firmly aligned with the wire clamping interface of the wire storage drum 50. The fasteners 46 are fasteners, and the wire feeding tube 41 is typically made of steel, providing excellent fixation for it.

[0027] The core components of the wire feeding mechanism 40 of the wire EDM lower frame are the wire feeding tube 41, the insulating connecting block 42, and the sensing tube 43. The wire feeding tube 41 is a relatively long metal tube, one end of which is connected to the output end of the metal cutting wire of the reversing device 30. The insulating connecting block 42 is installed at the front end of the wire feeding tube 41, and the sensing tube 43 is installed at the front end of the insulating connecting block 42. In this embodiment, the wire feeding tube 41, the insulating connecting block 42, and the sensing tube 43 constitute a straight tube assembly, which is used for the straight movement of the metal cutting wire to complete the wire feeding action. In this embodiment, the straight tube assembly formed by the wire feeding tube 41, the insulating connecting block 42, and the sensing tube 43 is fixed to the mounting base 45 by the fixing member 46. The structure is relatively simple, the movement path of the metal cutting wire is straight, and the wire threading process does not require the extension and retraction of the pipeline by an additional power structure as described in the patent literature mentioned in the background art. The technical solution of this application has advantages in terms of stability and cost.

[0028] In order to detect the movement of the metal cutting wire into place and improve the success rate of the metal cutting wire connecting to the wire storage drum 50, a correction tube 44 is provided at the end of the metal cutting wire that passes through the sensing tube 43. The correction tube 44 is connected to the pressure air tube and corrects the movement direction of the end of the metal cutting wire by pneumatic means, thereby forcing the end of the metal cutting wire to move towards the wire clamping interface of the wire storage drum 50, thereby increasing the success rate of the metal cutting wire forming.

[0029] In this embodiment, due to the inclusion of an insulating connecting block 42, the straightening tube 44 can be mounted via an added straightening tube mounting hole 422. Therefore, the straightening tube 44 is mounted on the insulating connecting block 42, which serves as both a mounting bracket and a gas guide structure for the straightening tube 44. An additional straightening tube air hole 424 is provided on the insulating connecting block 42, and a channel communicating with the straightening tube 44 is formed inside the insulating connecting block 42. In other embodiments, the straightening tube 44 can also be independently mounted on other structures. The end of the straightening tube 44 that outputs pressurized gas faces the end of the sensing tube 43. By adjusting the direction and pressure of the output gas from the straightening tube 44, the accuracy of wire splicing can be improved.

[0030] During automatic wire feeding, the metal cutting wire is hidden inside the wire feeding tube 41, and its position is difficult to detect. Therefore, a sensing tube 43 is installed at the front of the wire feeding tube 41, and the sensing tube 43 and the wire feeding tube 41 are connected by an insulating connecting block 42. The insulating connecting block 42 serves three main functions: First, it is the mounting structure for the wire feeding tube 41 and the sensing tube 43. The sensing tube 43 is located outside the mounting base 45, and its installation does not require any other hanging structure. Second, the internal channel of the insulating connecting block 42 serves as the path for the metal cutting wire. Third, the insulating connecting block 42 is made of insulating materials, such as rubber or ceramic, and has excellent insulation properties.

[0031] The sensing tube 43 is a metal tube with conductivity, serving as a sensing element to detect when the metal cutting wire reaches a preset position. When the metal cutting wire touches the sensing tube 43, the voltage of the sensing tube 43 changes. At this time, the sensing tube 43 synchronously transmits an electrical signal to the detection module. After processing, the detection module activates the wire clamping interface of the wire storage drum 50 after a 0.1-second delay, achieving high-precision wire clamping operation. In another embodiment, the change in voltage of the sensing tube 43 can also be used as the start signal to activate the wire clamping interface of the wire storage drum 50.

[0032] like Figures 2-3 As shown, in this embodiment, the wire feeding tube 41 serves as a support for the insulating connecting block 42, and the insulating connecting block 42 installed at the front end also serves as a support for the sensing tube 43 and the correction tube 44.

[0033] In this embodiment, the insulating connecting block 42 is a rectangular cube. The front end of the insulating connecting block 42 has a sensor tube mounting hole 421 and a straightening tube mounting hole 422, and the rear end has a wire feeding tube 41 mounting hole (not shown in the figure). The upper surface of the insulating connecting block 42 has six holes, including: a sensor tube fixing hole 425 corresponding to the sensor tube mounting hole 421, a straightening tube fixing hole 423 corresponding to the straightening tube mounting hole 422, and two wire feeding tube fixing holes 427 corresponding to the wire feeding tube 41 mounting hole. The sensor tube fixing holes 425, straightening tube fixing holes 423, and wire feeding tube fixing holes 427 are threaded holes; screws can be screwed in to position the corresponding sensor tube 43, straightening tube 44, and wire feeding tube 41. The other two holes on the upper surface of the insulating connecting block 42 are a straightening tube air hole 424 and a liquid blowing nozzle mounting hole 426.

[0034] The vent 424 of the straightening tube is internally connected to the mounting hole 422 of the straightening tube. After the straightening tube 44 is installed in the mounting hole 422 and the air nozzle is installed in the vent 424 of the straightening tube, pressurized gas is delivered to the vent 424 of the straightening tube through the pressurized air pipe. The pressurized gas is output from the straightening tube 44 and is used to correct the movement direction of the metal cutting wire end. By controlling the magnitude of the pressurized gas and the orientation of the end of the straightening tube 44, the direction of the metal cutting wire end can be accurately corrected, and a highly reliable wire-forming operation can be achieved.

[0035] Combination Figure 4 As shown, the lower part of the insulating connecting block 42 has a debris falling hole 428, which is correspondingly located along the path of the metal cutting wire moving within the insulating connecting block 42. During the wire threading process and the cutting operation, coolant and conductor debris inevitably reach the insulating connecting block 42 along the path of the metal cutting wire. The debris falling hole 428 provides a channel for liquid and dust debris to fall, while also ensuring electrical insulation between the wire feeding tube 41 and the sensing tube 43, preventing accidental activation of the wire clamping interface of the wire storage drum 50, and avoiding accidental wire knotting.

[0036] Because coolant and conductor debris may adhere to the metal cutting wire, and to enhance the reliability of the wire bonding operation, a blower nozzle mounting hole 426 corresponding to the debris drop hole 428 is provided on the upper part of the insulating connecting block 42. The blower nozzle mounting hole 426 is used to forcefully blow away liquid dust and debris (including residue left from the wire cutting operation) transported along the metal cutting wire's path via an external air pipe. The blower nozzle mounting hole 426 connects to a pressure air pipe through a nozzle. The pressure gas can better ensure the electrical insulation between the wire feeding tube 41 and the sensing tube 43, and can also effectively clean the metal cutting wire.

[0037] like Figure 5As shown, the reversing device 30 has a trumpet-shaped guide structure 31 at the interface with the wire cutting lower frame feeding mechanism 40. The flared end of the guide structure 31 faces the direction of the incoming metal cutting wire, and the converging end faces the straight tube assembly. When the metal cutting wire moves to the output position within the reversing device 30, it can more easily pass through the straight tube assembly via the guide structure 31.

[0038] The reversing device 30 has a built-in correction air channel 32, which guides the metal cutting wire towards the straight tube assembly and ensures that the end of the metal cutting wire can accurately enter the guide structure 31 and then the wire feeding tube 41. Specifically, two correction air channels 32 are built into the end of the output metal cutting wire of the reversing device 30, and the two correction air channels 32 are symmetrically arranged on both sides of the end of the output metal cutting wire conveying channel of the reversing device 30. The two correction air channels 32 can be connected to pressure air pipes individually. By controlling the pressure of the output pressure gas in the two correction air channels 32, the movement direction of the end of the metal cutting wire can be corrected, ensuring that the end of the metal cutting wire is accurately fed into the guide structure 31, further improving the wire threading success rate between the reversing device 30 and the wire feeding tube 41 in the wire cutting lower frame wire feeding mechanism 40.

[0039] The above content is only a preferred embodiment of the present invention. For those skilled in the art, many changes can be made in the specific implementation and application scope based on the ideas of the present invention. As long as these changes do not depart from the concept of the present invention, they all fall within the protection scope of the present invention patent.

Claims

1. A wire feeding mechanism for a wire EDM lower frame, used to convey metal cutting wire from a reversing device to a wire storage drum, characterized in that: The wire feeding mechanism of the wire EDM lower frame includes a straight tube assembly. One end of the straight tube assembly is connected to the output end of the reversing device, and the other end of the straight tube assembly is connected to the wire clamping interface of the wire storage drum. The wire clamping interface of the wire storage drum is an automatically opening and closing wire clamping mechanism.

2. The wire feeding mechanism for the wire EDM lower frame according to claim 1, characterized in that: The straight tube assembly includes a wire feeding tube, an insulating connecting block, and a sensing tube. The wire feeding tube and the sensing tube are connected through the insulating connecting block, and their axes coincide. The sensing tube is electrically insulated from the wire feeding tube and faces the wire storage drum. The wire feeding tube is connected to the output end of the reversing device. A debris falling hole is provided at the lower part of the insulating connecting block. This debris falling hole is located on the path of the metal cutting wire moving within the insulating connecting block and between the sensing tube and the wire feeding tube.

3. The wire feeding mechanism for the wire EDM lower frame according to claim 2, characterized in that: The end of the sensing tube away from the insulating connecting block is provided with an outlet of a correction tube that corrects the direction of movement of the metal cutting wire by outputting gas.

4. The wire feeding mechanism for the wire EDM lower frame according to claim 3, characterized in that: The front end of the insulating connecting block has a sensor tube mounting hole and a correction tube mounting hole for installing the sensor tube and the correction tube, respectively. The rear end of the insulating connecting block has a wire feeding tube mounting hole for installing the wire feeding tube. The wire feeding tube mounting hole and the sensor tube mounting hole are coaxial. The insulating connecting block has a channel inside that connects the wire feeding tube mounting hole and the sensor tube mounting hole in a straight line. The insulating connecting block has a correction tube air hole. The insulating connecting block has a channel inside that connects the correction tube air hole and the correction tube.

5. The wire feeding mechanism for the wire EDM lower frame according to claim 2, characterized in that: The insulating connecting block is provided with a liquid blowing nozzle mounting hole that communicates with the debris falling hole. The liquid blowing nozzle mounting hole is used to forcefully blow off liquid dust and debris transmitted from the wire feeding tube along the path of the metal cutting wire via an external air pipe.

6. The wire feeding mechanism for the wire EDM lower frame according to claim 1, characterized in that: The reversing device has a flared guide structure at the interface with the straight tube assembly. The flared end of the guide structure faces the direction of the incoming metal cutting wire, and the converging end faces the straight tube assembly.

7. The wire feeding mechanism for the wire EDM lower frame according to claim 1, characterized in that: The reversing device has a built-in correction air channel, which is used to assist in the movement of the metal cutting wire toward one end of the straight tube assembly.

8. The wire feeding mechanism for the wire EDM lower frame according to claim 7, characterized in that: There are two correction air channels, and the two correction air channels are symmetrically arranged on both sides of the end of the metal cutting wire conveying channel output by the reversing device.

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