A turning tool electrode mechanism and a hole bending machining tool

Abstract

The application discloses a steering type tool electrode mechanism and a hole bending machining tool thereof, which comprises a gas chamber, a shell and a gas cylinder, a transmission mechanism and a tool electrode arranged in the shell, the transmission mechanism comprises at least three shift forks which are sequentially hinged, a supporting rod of the uppermost shift fork extends into the gas chamber through a connecting piece arranged at a first through hole, the connecting piece comprises a hemispherical swing seat which is slidably arranged on the first through hole and has a diameter larger than that of the first through hole, the supporting rod of the uppermost shift fork penetrates through the spherical swing seat and is fixed on the spherical swing seat, a second through hole is opposite to the side wall of the supporting rod, and the tool electrode penetrates through the shell and is hinged with the lowermost shift fork; the shift forks are arranged in a hinged mode and are hinged with the tool electrode, the tool electrode is driven to move by blowing of the gas cylinder, the operation is convenient and simple, the tool electrode has a large deflection amplitude, and the hole bending machining is completed under the premise of ensuring the electric spark machining quality of the tool electrode.

Description

Technical Field

[0001] This invention relates to the field of hole bending technology, and in particular to a steering tool electrode mechanism and a hole bending tool thereof. Background Technology

[0002] The development of modern industry demands more novel and complex mechanical structures to meet the ever-increasing user needs. Simultaneously, the overall development of industry has made some structures that were previously difficult to process easier to manufacture. Bent holes, due to their unique structure and function, are frequently used in the design of various mechanical parts, especially in the injection molding industry. Because suitable cooling holes are needed to control mold temperature, bent holes are commonly incorporated into molds. The bent hole structure has enormous potential and a wide range of applications.

[0003] Traditional machining methods for bending holes are often limited by tooling and processing techniques, making it difficult to meet machining requirements. Even when bending holes can be machined, the hole diameter or machining accuracy is limited, and often requires specialized technology or equipment. Electrical discharge machining (EDM) is the most commonly used special machining method in mold manufacturing, and research on EDM for bending holes is the most extensive and fruitful. Although the existing structures and technologies for EDM for bending holes have been developed for many years, some significant problems remain, such as low machining efficiency, difficulty in forming structures with large curvature changes in a single operation, and wear and tear on tool electrodes.

[0004] For example, the precision tool electrode CNC EDM device and processing method disclosed in CN107186297A includes a main body base, a column base, an L-shaped column, a Z-axis guide rail base, a Z-axis drive motor, a worktable, a Y-axis guide rail, a Y-axis lead screw pair, a Y-axis drive motor, a Z-axis turntable, a servo spindle, a wire guide mechanism, an X-axis guide rail, and an X-axis drive motor. The main body base is its main support body, and the column base is fixed on the main body base. Although this solution can realize the bending hole processing of the workpiece, the operation is complicated and the processing efficiency is low, and it cannot be formed in one step.

[0005] To address the aforementioned problems, this invention provides a steering tool electrode mechanism and its bending hole machining tool to solve the issues of low machining efficiency and complex structure of conventional electrical discharge machining devices. Summary of the Invention

[0006] The purpose of this invention is to provide a steering tool electrode mechanism and a bending hole machining tool thereof, so as to improve the bending hole machining efficiency and reduce the complexity of the machining device.

[0007] To achieve the above objectives, the present invention provides the following solution:

[0008] A steering tool electrode mechanism includes an air chamber, a housing and a cylinder communicating with the air chamber through a first through hole and a second through hole, a transmission mechanism disposed within the housing, and a tool electrode disposed on the transmission mechanism. The transmission mechanism includes at least three forks hinged sequentially. The support rod of the uppermost fork extends into the air chamber through a connector disposed at the first through hole. The connector includes a hemispherical swing seat slidably disposed on the first through hole and having a diameter larger than the diameter of the first through hole. The support rod of the uppermost fork passes through the hemispherical swing seat and is fixed on the hemispherical swing seat. The second through hole is directly opposite the side wall of the support rod. The tool electrode passes through the housing and is hinged to the lowermost fork. The cylinder is used to blow air onto the support rod.

[0009] Preferably, a sealing ring is provided at the connection between the air chamber and the housing.

[0010] Preferably, a connecting pad is fitted on the outer wall of the support rod of the uppermost shift fork, and an installation hole is provided on the connecting pad. A threaded hole is provided at the position corresponding to the installation hole of the hemispherical swing seat, and the support rod and the hemispherical swing seat are fixed by bolts passing through the installation hole and the threaded hole in sequence.

[0011] Preferably, the air chamber is provided with an air plug having an inverted trapezoidal cavity, the support rod is disposed in the inverted trapezoidal cavity, and the second through hole penetrates the air plug and communicates with the inverted trapezoidal cavity.

[0012] Preferably, a first pivot is provided at the U-shaped opening end of the shift fork, the first pivot passes through the two support arms at the U-shaped opening end, a steering block is provided on the first pivot, a second pivot is provided on the steering block perpendicular to the first pivot, the support rods of adjacent shift forks are hinged to the second pivot, and the planes on the support arms of adjacent shift forks are perpendicular to each other.

[0013] Preferably, the housing includes an upper outer shell and a lower outer shell, which are detachably connected by a locking pin.

[0014] Preferably, the cylinder and the air chamber are connected by an air supply pipe.

[0015] A bending hole machining tool includes a base, a horizontal drive mechanism disposed on the base, a worktable disposed on the horizontal drive mechanism, a column disposed on the base, a vertical drive mechanism disposed on the column, a steering tool electrode mechanism disposed on the vertical drive mechanism, and a pneumatic control system for controlling the cylinder.

[0016] Preferably, the horizontal drive mechanism includes a stepper motor and a horizontal guide rail arranged in sequence, and the stepper motor is connected to the horizontal guide rail via a coupling.

[0017] Preferably, the vertical drive mechanism includes a bracket on one side of the top of the column, a servo motor on the bracket, a small synchronous pulley connected to the output shaft of the servo motor, a large synchronous pulley on the other side of the top of the column connected sequentially from top to bottom, an upper bearing seat, a synchronous belt rotating shaft, a lower bearing seat, a vertical shaft and lead screw coupling, a lead screw bearing seat, a lead screw, a vertical guide rail on the column, and a vertical feed control system. The small synchronous pulley and the large synchronous pulley are connected by a synchronous belt. The steering tool electrode mechanism is connected by a sliding seat on the vertical guide rail. The sliding seat is engaged with the lead screw. The vertical feed control system is used to control the movement of the sliding seat.

[0018] The present invention achieves the following technical effects compared to the prior art:

[0019] 1. In this invention, a lever fork is hinged to each other and hinged to the tool electrode. The uppermost lever fork's support rod is blown by a cylinder. Under the action of the blowing force, the support rod will deflect. Since the hemispherical swing seat is slidably set with the air chamber, the support rod will swing left and right without falling down, thereby driving the lever fork to swing, and finally moving the tool electrode. The operation is convenient and simple, and ensures that the tool electrode has a large deflection range. At the same time, the bending hole is completed while ensuring the quality of the tool electrode's electrical discharge machining. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Appendix Figure 1 This is a schematic diagram of the steering tool electrode mechanism of the present invention;

[0022] Appendix Figure 2 This is a cross-sectional view of the steering tool electrode mechanism of the present invention;

[0023] Appendix Figure 3 This is a schematic diagram of the structure of the bending hole machining tool of the present invention;

[0024] Appendix Figure 4 This is a schematic diagram of the vertical drive mechanism of the present invention;

[0025] The components include: 1. Base; 2. Vertical feed control system; 3. Stepper motor; 4. Coupling; 5. Horizontal guide rail; 6. Worktable; 7. Steering tool electrode mechanism; 8. Lead screw; 9. Vertical drive mechanism; 10. Synchronous belt rotating shaft; 11. Column; 12. Cylinder; 13. Air supply pipe; 14. Air chamber; 15. Sealing ring; 16. Upper outer shell; 17. Lower outer shell; 18. Tool electrode; 19. First rotating shaft; 20. 21. Steering block; 22. Second rotating shaft; 23. Shift fork; 24. Second through hole; 25. Locking pin; 26. Bracket; 27. Servo motor; 28. Synchronous small pulley; 29. ​​Synchronous belt; 30. Synchronous large pulley; 31. Upper bearing housing; 32. Lower bearing housing; 33. Vertical shaft and lead screw coupling; 34. Lead screw bearing housing; 35. Vertical guide rail; 36. Support rod; 37. Air plug; 38. Connecting pad; 39. Spherical swing seat. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] The purpose of this invention is to provide a steering tool electrode mechanism and a bending hole machining tool thereof, so as to improve the bending hole machining efficiency and reduce the complexity of the machining device.

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] refer to Figures 1 to 2A steering tool electrode mechanism includes an air chamber 14, a housing and a cylinder 12 communicating with the air chamber 14 through a first through hole 23 and a second through hole, a transmission mechanism disposed within the housing, and a tool electrode 18 disposed on the transmission mechanism. The transmission mechanism includes at least three forks 22 hinged sequentially. The support rod of the uppermost fork 22 extends into the air chamber through a connector disposed at the first through hole 23. The connector includes a hemispherical swing seat slidably disposed on the first through hole 23 and having a diameter larger than the diameter of the first through hole 23. The support rod 35 of the uppermost fork 22 passes through the hemispherical swing seat and is fixed to the hemispherical swing seat 38. The second through hole is directly opposite the side wall of the support rod. The tool electrode passes through the housing and is hinged to the lowest layer of the shift fork. The cylinder 12 is used to blow air onto the support rod. In this invention, the support rod is set by the mutually hinged shift forks and hinged to the tool electrode. The cylinder 12 blows air onto the support rod of the uppermost shift fork 22. Under the action of the blowing force, the support rod will deflect. Since the hemispherical swing seat 38 is slidably set with the air chamber, the support rod will swing left and right without falling down, thereby driving the shift fork to swing, and finally causing the tool electrode to move. It also ensures that the end of the tool electrode 18 always points downward, so as to complete the processing of the bent hole while ensuring the cutting quality of the tool electrode. Moreover, the structure of this invention is simple and easy to operate.

[0030] refer to Figures 1 to 2 A sealing ring 15 is provided at the position where the air chamber connects to the housing.

[0031] refer to Figure 2 A connecting pad 37 is fitted on the outer wall of the support rod of the uppermost fork 22. The connecting pad 37 has an installation hole. The hemispherical swing seat 38 has a threaded hole at the position corresponding to the installation hole. The support rod and the hemispherical swing seat 38 are fixed by bolts passing through the installation hole and the threaded hole in sequence.

[0032] refer to Figure 2 An air plug 36 with an inverted trapezoidal cavity is provided in the air chamber, and a support rod is provided in the inverted trapezoidal cavity. A second through hole passes through the air plug 36 and communicates with the inverted trapezoidal cavity.

[0033] refer to Figure 2 A first pivot 19 is provided at the U-shaped opening end of the shift fork. The first pivot 19 passes through the two support arms at the U-shaped opening end. A steering block 20 is provided on the first pivot 19. A second pivot 21 perpendicular to the first pivot 19 is provided on the steering block 20. The support rods of adjacent shift forks 22 are hinged to the second pivot 21. The planes on the support arms of adjacent shift forks are perpendicular to each other.

[0034] refer to Figure 2The housing includes an upper outer shell 16 and a lower outer shell 17, which are detachably connected by a locking pin 24.

[0035] refer to Figure 3 The cylinder 12 is connected to the air chamber through the air supply pipe 13.

[0036] refer to Figure 3 A bending hole machining tool includes a base 1, a horizontal drive mechanism disposed on the base 1, a worktable 6 disposed on the horizontal drive mechanism, a column 11 disposed on the base 1, a vertical drive mechanism 9 disposed on the column 11, a steering tool electrode mechanism 7 disposed on the vertical drive mechanism 9, and a pneumatic control system for controlling the cylinder 12.

[0037] refer to Figure 3 The horizontal drive mechanism includes a stepper motor 3 and a horizontal guide rail 5 arranged in sequence. The stepper motor 3 is connected to the horizontal guide rail 5 through a coupling 4.

[0038] refer to Figure 4 The vertical drive mechanism includes a bracket 25 mounted on one side of the top of the column 11, a servo motor 26 mounted on the bracket 25, a small synchronous pulley 27 connected to the output shaft of the servo motor 26, a large synchronous pulley 29 mounted on the other side of the top of the column 11 and connected sequentially from top to bottom, an upper bearing seat 30, a synchronous belt rotating shaft, a lower bearing seat 31, a vertical shaft and lead screw coupling 32, a lead screw bearing seat 33, a lead screw 8, a vertical guide rail 34 mounted on the column 11, and a vertical feed control system 2. The small synchronous pulley 27 and the large synchronous pulley 29 are connected by a synchronous belt 28. The steering tool electrode mechanism 7 is connected by a sliding seat mounted on the vertical guide rail. The sliding seat is engaged with the lead screw. The vertical feed control system 2 is used to control the movement of the sliding seat.

[0039] Any adaptive changes made according to actual needs are within the scope of protection of this invention.

[0040] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A steering tool electrode mechanism, characterized in that, The device includes an air chamber, a housing and a cylinder that communicate with the air chamber through a first through hole and a second through hole, a transmission mechanism disposed within the housing, and a tool electrode disposed on the transmission mechanism. The transmission mechanism includes at least three forks that are hinged in sequence. The support rod of the uppermost fork extends into the air chamber through a connector disposed at the first through hole. The connector includes a hemispherical swing seat that is slidably disposed on the first through hole and has a diameter larger than the diameter of the first through hole. The support rod of the uppermost fork passes through the hemispherical swing seat and is fixed on the hemispherical swing seat. The second through hole is directly opposite the side wall of the support rod. The tool electrode passes through the housing and is hinged to the lowermost fork. The cylinder is used to blow air onto the support rod. A first pivot is provided at the U-shaped opening end of the shift fork. The first pivot passes through the two support arms at the U-shaped opening end. A steering block is provided on the first pivot. A second pivot perpendicular to the first pivot is provided on the steering block. The support rods of adjacent shift forks are hinged to the second pivot. The planes on the support arms of adjacent shift forks are perpendicular to each other.

2. The steering tool electrode mechanism according to claim 1, characterized in that, A sealing ring is provided at the connection between the air chamber and the shell.

3. The steering tool electrode mechanism according to claim 1, characterized in that, A connecting pad is fitted on the outer wall of the support rod of the uppermost shift fork. The connecting pad has an installation hole. The spherical swing seat has a threaded hole at the position corresponding to the installation hole. The support rod and the spherical swing seat are fixed by bolts passing through the installation hole and the threaded hole in sequence.

4. A steering tool electrode mechanism according to claim 3, characterized in that, The air chamber is provided with an air plug having an inverted trapezoidal cavity, the support rod is disposed in the inverted trapezoidal cavity, and the first through hole passes through the air plug and communicates with the inverted trapezoidal cavity.

5. A steering tool electrode mechanism according to claim 1, characterized in that, The housing includes an upper outer shell and a lower outer shell, which are detachably connected by a locking pin.

6. A steering tool electrode mechanism according to claim 1, characterized in that, The cylinder and the air chamber are connected by an air supply pipe.

7. A tool for machining bent holes, characterized in that, The steering tool electrode mechanism according to any one of claims 1 to 6 includes a base, a horizontal drive mechanism disposed on the base, a worktable disposed on the horizontal drive mechanism, a column disposed on the base, a vertical drive mechanism disposed on the column, a steering tool electrode mechanism disposed on the vertical drive mechanism, and a pneumatic control system for controlling the cylinder.

8. A bending hole machining tool according to claim 7, characterized in that, The horizontal drive mechanism includes a stepper motor and a horizontal guide rail arranged in sequence, and the stepper motor is connected to the horizontal guide rail via a coupling.

9. A bending hole machining tool according to claim 7, characterized in that, The vertical drive mechanism includes a bracket on one side of the top of the column, a servo motor on the bracket, a small synchronous pulley connected to the output shaft of the servo motor, a large synchronous pulley on the other side of the top of the column connected from top to bottom, an upper bearing seat, a synchronous belt rotating shaft, a lower bearing seat, a vertical shaft and lead screw coupling, a lead screw bearing seat, a lead screw, a vertical guide rail on the column, and a vertical feed control system. The small synchronous pulley and the large synchronous pulley are connected by a synchronous belt. The steering tool electrode mechanism is connected by a sliding seat on the vertical guide rail, which meshes with the lead screw. The vertical feed control system is used to control the movement of the sliding seat.

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