Electrode for low-voltage micro-arc machining of square hole

Abstract

The utility model discloses an electrode for low-voltage micro-arc machining of a square hole, and particularly relates to the technical field of non-traditional machining, the electrode comprises a clamping part and a machining part, the machining part is fixedly communicated with the center position of the bottom end of the clamping part, a center through hole is formed in the center axis of the machining part, and the top end diameter of the center through hole is larger than the bottom end diameter. A spiral groove is formed in the center through hole, and a chip groove is formed in the outer side of the machining part. Scraps and waste residues generated in the machining process can be discharged through the three chip discharging grooves, meanwhile, the three chip discharging grooves can assist in heat dissipation and prevent a machining area from being overheated, and therefore a machining part and a workpiece are protected, the flow path of fluid can be changed through the special geometrical shape of the spiral grooves, and the machining efficiency is improved. Therefore, the fluid speed is increased to strengthen the fluid dynamic arc breaking effect, the discharging effect of the inner flushing liquid on interelectrode electric corrosion products is improved, the structure is simple, the electric corrosion products can be conveniently discharged, and the loss of a machining part is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of special processing, and more specifically, to an electrode for low-voltage micro-arc processing of square holes. Background Art

[0002] Low-voltage micro-arc machining (LVMM) is a machining method that uses the high temperatures generated by continuous or intermittent arc discharge to remove metal materials, creating the desired shape and size. In LVMM, an electrode, acting as one pole of the discharge, creates an arc discharge between the electrode and the workpiece. The high temperature generated by the discharge melts and vaporizes the workpiece, achieving the desired material removal. Existing die-sinking EDM methods, however, struggle with chip removal and poor results, failing to meet these requirements.

[0003] After searching, the Chinese patent with announcement number CN106041232A discloses a spindle actuator of an electrospark machining device for machining square holes and a machining method implemented by using the actuator. By utilizing the revolution and rotation motion of the Reuleaux triangle electrode, the electrode can be swept across a square area along the cross-sectional direction to achieve square hole machining; the cutting fluid is stirred by the rotation motion of the Reuleaux triangle electrode, which is conducive to promoting the smooth discharge of electro-erosion products and improving the effective discharge rate, thereby improving machining efficiency; the principle of electrospark machining can be used to realize the machining of small-sized square holes with a large aspect ratio and square holes of difficult-to-machine materials.

[0004] When the above-mentioned electrode is in use, the center axis of the tool electrode rotates around the center axis of the square sleeve to perform orbital motion, so that the tool electrode can sweep across a square area along the cross-sectional direction. However, when processing hole structures, arc processing will also have the problem of difficult removal of electro-erosion products, which will cause large electrode loss, poor excretion and even serious short circuit. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an electrode for low-voltage micro-arc machining of square holes, aiming to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electrode for low-voltage micro-arc processing of square holes, comprising a clamping part and a processing part, and the processing part is fixedly connected at the center position of the bottom end of the clamping part, a central through hole is provided at the central axis of the processing part, and the top diameter of the central through hole is larger than the bottom diameter, a spiral groove is provided inside the central through hole, and a chip removal groove is provided on the outside of the processing part, and the chip removal groove extends upward from the bottom end of the processing part.

[0007] Furthermore, the cross-section of the processed portion is a Reuleaux triangle.

[0008] It can be seen that in the above technical solution, the Reuleaux triangle can present an approximately square characteristic during the rotation process, and the fixed width curve of the Reuleaux triangle can ensure that the cutting width is always constant during the processing process, so the processing part can process a square hole with a regular shape and precise size. At the same time, during the processing, the shape of the Reuleaux triangle can effectively discharge the debris generated by cutting from the processing area, avoiding debris accumulation and blockage, thereby improving processing efficiency and quality.

[0009] Furthermore, there are three chip removal grooves, and the three chip removal grooves are arranged at equal intervals along the outer side of the processing portion.

[0010] Furthermore, a plurality of liquid inlet holes are provided on the outer side of the clamping portion near the top edge.

[0011] It can be seen that in the above technical solution, the cutting fluid enters the clamping portion through a plurality of fluid inlet holes.

[0012] Furthermore, an adjusting assembly is provided inside the clamping portion, and the adjusting assembly includes a baffle, two threaded plates and a sealing gasket.

[0013] Furthermore, the two threaded plates are fixedly connected to the baffle on one side facing each other, and the two threaded plates are threadedly connected to the clamping portion, and the sealing gasket is fixedly sleeved on the baffle.

[0014] It can be seen that in the above technical solution, the number of liquid inlet holes can be adjusted conveniently.

[0015] Furthermore, a handle is fixedly connected to the top end of one of the threaded plates.

[0016] It can be seen that in the above technical solution, the two threaded plates and the baffle are driven to rotate conveniently.

[0017] The technical effects and advantages of this utility model are:

[0018] 1. The utility model can discharge the debris and waste residue generated during the processing through the three chip removal grooves. At the same time, the three chip removal grooves can also help dissipate heat to prevent overheating of the processing area, thereby protecting the processing part and the workpiece. The spiral groove can change the flow path of the fluid through its special geometric shape, thereby increasing the fluid velocity to enhance the hydrodynamic arc breaking effect and improve the discharge effect of the internal flushing liquid on the inter-electrode electrolytic corrosion products. The structure is simple, the electrolytic corrosion products are conveniently removed, and the loss of the processing part is effectively reduced;

[0019] 2. The utility model drives the two threaded plates and the baffle to rotate and move upward by rotating the handle, thereby adjusting the position of the two threaded plates and the baffle in the clamping part, thereby exposing more liquid inlet holes. By increasing the number of liquid inlet holes, the flow rate and flow rate of the cutting fluid can be increased; by reducing the number of liquid inlet holes, the vibration and deformation caused by excessive fluid dynamics can be reduced, ensuring the stability and accuracy of the processing process. It is suitable for processing high-precision workpieces, has a simple structure, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in size, without affecting the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0022] Figure 2 It is a bottom view of the overall structure of the utility model.

[0023] Figure 3 This is a schematic diagram of the assembly structure of the clamping part and the processing part of the utility model.

[0024] Figure 4 This is a partial structural diagram of the adjustment component of the utility model.

[0025] In the figure: 1. Clamping part; 2. Processing part; 3. Chip removal groove; 4. Liquid inlet hole; 5. Adjustment component; 6. Center through hole; 7. Spiral groove; 501. Baffle; 502. Threaded plate; 503. Sealing gasket; 504. Handle. DETAILED DESCRIPTION

[0026] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can readily understand the other advantages and benefits of the present invention from the contents disclosed in this specification. Obviously, the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0027] Refer to the instruction manual Figure 1-4, an electrode for low-voltage micro-arc processing of square holes in this embodiment includes a clamping part 1 and a processing part 2, and the processing part 2 is fixedly connected at the center position of the bottom end of the clamping part 1, a central through hole 6 is opened at the central axis of the processing part 2, and the top diameter of the central through hole 6 is larger than the bottom diameter, a spiral groove 7 is opened inside the central through hole 6, a chip groove 3 is opened on the outside of the processing part 2, and the chip groove 3 extends upward from the bottom end of the processing part 2, the cross-section of the processing part 2 is a Reuleaux triangle, the number of the chip grooves 3 is three, and the three chip grooves 3 are arranged at equal intervals along the outside of the processing part 2.

[0028] Furthermore, a plurality of liquid inlet holes 4 are provided on the outer side of the clamping portion 1 near the top edge, and an adjustment component 5 is provided inside the clamping portion 1. The adjustment component 5 includes a baffle 501, two threaded plates 502 and a sealing gasket 503. The two threaded plates 502 are fixedly connected to the baffle 501 on the opposite sides, and the two threaded plates 502 are threadedly connected to the clamping portion 1. The sealing gasket 503 is fixedly sleeved on the baffle 501, and a handle 504 is fixedly connected to the top of one of the threaded plates 502.

[0029] Among them, the clamping part 1 is installed on the main spindle sleeve of the machine tool, and the clamping part 1 is located inside the main spindle sleeve of the machine tool. The cutting fluid can enter the clamping part 1 through multiple liquid inlet holes 4, and then enter the central through hole 6 in the processing part 2 through the clamping part 1. The handle 504 is turned to drive the two threaded plates 502 and the baffle 501 to rotate and move upward, thereby adjusting the positions of the two threaded plates 502 and the baffle 501 in the clamping part 1, and then more liquid inlet holes 4 can be exposed. By increasing the number of liquid inlet holes 4, the flow rate and flow rate of the cutting fluid can be increased; by reducing the number of liquid inlet holes 4, the vibration and deformation caused by excessive fluid dynamics can be reduced, ensuring the stability and accuracy of the processing process. It is suitable for processing high-precision workpieces, has a simple structure, and is easy to use.

[0030] The method of using this embodiment is:

[0031] During use, the clamping part 1 is installed on the main spindle sleeve of the machine tool, and the cutting fluid can enter the central through hole 6 in the processing part 2, and flush the bottom end face of the processing part 2 and the processing gap of the processing workpiece surface. At the same time, the top diameter of the central through hole 6 is larger than the bottom diameter. The larger top diameter can increase the flow rate at the water inlet of the central through hole 6, and the smaller bottom diameter can increase the water pressure at the water outlet at the bottom of the central through hole 6, thereby improving the flushing capacity. Since the cross-section of the processing part 2 is a Reuleaux triangle, the Reuleaux triangle can present an approximately square characteristic during the rotation process, and the fixed width curve of the Reuleaux triangle can ensure that the cutting width is always kept constant during the processing process, so the processing part 2 can process a square hole with regular shape and precise size. At the same time, during the processing, the shape of the Reuleaux triangle can effectively The chips generated by cutting are discharged from the processing area to avoid chip accumulation and blockage, thereby improving processing efficiency and quality. The three chip grooves 3 can discharge the chips and waste residue generated during the processing. If these chips and waste residue are not discharged in time, they will block the processing gap, resulting in a decrease in processing efficiency and even damage the processing part 2. At the same time, the three chip grooves 3 can also help dissipate heat to prevent the processing area from overheating, thereby protecting the processing part 2 and the workpiece. The spiral groove 7 can change the flow path of the fluid through its special geometric shape, thereby generating a rotation or eddy current effect. This effect can increase the kinetic energy of the fluid, thereby enhancing the fluid dynamics, increasing the fluid velocity to enhance the fluid dynamic arc breaking effect, and improve the discharge effect of the internal flushing liquid on the inter-electrode electrolytic corrosion products. The structure is simple, convenient for removing electrolytic corrosion products, and effectively reduces the loss of the processing part 2.

[0032] The contents not described in detail in the specification belong to the existing technology known to those skilled in the art. The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An electrode for low-voltage micro-arc machining of square holes, characterized in that: The invention comprises a clamping portion (1) and a processing portion (2), wherein the processing portion (2) is fixedly connected to the center position of the bottom end of the clamping portion (1), a central through hole (6) is provided at the central axis of the processing portion (2), and the top diameter of the central through hole (6) is larger than the bottom diameter, a spiral groove (7) is provided inside the central through hole (6), and a chip removal groove (3) is provided on the outside of the processing portion (2), and the chip removal groove (3) extends upward from the bottom end of the processing portion (2).

2. The electrode for low-voltage micro-arc machining of square holes according to claim 1, characterized in that: The cross section of the processed portion (2) is a Reuleaux triangle.

3. The electrode for low-voltage micro-arc machining of square holes according to claim 1, characterized in that: The number of the chip removal grooves (3) is three, and the three chip removal grooves (3) are arranged at equal intervals along the outer side of the processing portion (2).

4. The electrode for low-voltage micro-arc machining of square holes according to claim 1, characterized in that: A plurality of liquid inlet holes (4) are provided on the outer side of the clamping portion (1) near the top edge.

5. The electrode for low-voltage micro-arc machining of square holes according to claim 1, characterized in that: An adjustment assembly (5) is provided inside the clamping portion (1), and the adjustment assembly (5) comprises a baffle (501), two threaded plates (502) and a sealing gasket (503).

6. The electrode for low-voltage micro-arc machining of square holes according to claim 5, characterized in that: The two threaded plates (502) are fixedly connected to the baffle (501) on the opposite sides thereof, and the two threaded plates (502) are threadedly connected to the clamping portion (1), and the sealing gasket (503) is fixedly sleeved on the baffle (501).

7. The electrode for low-voltage micro-arc machining of square holes according to claim 5, characterized in that: A handle (504) is fixedly connected to the top end of one of the threaded plates (502).

Images