WO2024134747A1 - プラズマ発生装置 - Google Patents
プラズマ発生装置 Download PDFInfo
- Publication number
- WO2024134747A1 WO2024134747A1 PCT/JP2022/046793 JP2022046793W WO2024134747A1 WO 2024134747 A1 WO2024134747 A1 WO 2024134747A1 JP 2022046793 W JP2022046793 W JP 2022046793W WO 2024134747 A1 WO2024134747 A1 WO 2024134747A1
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- WIPO (PCT)
- Prior art keywords
- holder
- electrode
- cover
- body cover
- cable
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/26—Plasma torches
- H05H1/32—Plasma torches using an arc
- H05H1/34—Details, e.g. electrodes, nozzles
- H05H1/3423—Connecting means, e.g. electrical connecting means or fluid connections
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/26—Plasma torches
- H05H1/32—Plasma torches using an arc
- H05H1/34—Details, e.g. electrodes, nozzles
- H05H1/3457—Nozzle protection devices
Definitions
- This disclosure relates to a plasma generating device in which a reaction chamber is partitioned by a main body cover that functions as a housing.
- the following patent document describes a plasma generating device in which a reaction chamber is partitioned by a main body cover that functions as a housing.
- the objective of this specification is to easily attach the main body cover to the base.
- this specification discloses a plasma generating device that includes a body cover that defines a reaction chamber and functions as a housing and has an engaging portion, and a base to which the body cover is detachably attached and that has an engaged portion, and the engaging portion of the body cover is attached to the engaged portion of the base.
- the main body cover can be easily attached to the base.
- FIG. 1 is a diagram showing a plasma device.
- FIG. 2 is a perspective view showing a plasma head.
- FIG. 3 is a cross-sectional view of the plasma head of FIG. 2.
- FIG. 2 is an enlarged cross-sectional view of a plasma head.
- FIG. 2 is an enlarged cross-sectional view of a plasma head.
- FIG. 1 is a cross-sectional view showing a conventional plasma head.
- FIG. 1 is a perspective view showing a conventional plasma head.
- FIG. 1 is a perspective view showing a conventional plasma head with a body cover and a holder cover removed.
- FIG. 1 is a perspective view showing a conventional plasma head with a body cover and a holder cover removed.
- FIG. 2 is a perspective view showing the plasma head with the body cover removed.
- FIG. FIG. 2 is a perspective view showing a plasma head with the holder cover removed.
- the plasma device 10 includes a plasma head 11, a robot 13, and a control box 15.
- the plasma head 11 is attached to the robot 13.
- the robot 13 is, for example, a serial link type robot (which can also be called an articulated robot), and the plasma head 11 is attached to the tip of the robot 13 via a bracket 12.
- the plasma head 11 is capable of irradiating plasma gas while attached to the tip of the robot 13.
- the plasma head 11 is capable of moving three-dimensionally in response to the drive of the robot 13.
- the control box 15 is mainly composed of a computer, and controls the plasma device 10.
- the control box 15 has a power supply unit 15A that supplies power to the plasma head 11, and a gas supply unit 15B that supplies gas to the plasma head 11.
- the power supply unit 15A is connected to the plasma head 11 via a power cable (not shown).
- the power supply unit 15A changes the voltage applied to the electrode 30 (see Figures 3 to 5) of the plasma head 11 based on the control of the control box 15.
- the gas supply unit 15B is also connected to the plasma head 11 via a gas tube 19.
- the gas supply unit 15B supplies a reactive gas, described below, to the plasma head 11 under the control of the control box 15.
- the control box 15 controls the gas supply unit 15B, and controls the amount of gas supplied from the gas supply unit 15B to the plasma head 11.
- the robot 13 operates under the control of the control box 15, and irradiates the workpiece W placed on the table 17 with plasma gas from the plasma head 11.
- the control box 15 also includes an operation unit 15C that has a touch panel and various switches.
- the control box 15 displays various setting screens and operating states (e.g., gas supply state) on the touch panel of the operation unit 15C.
- the control box 15 also accepts various information through operational input to the operation unit 15C.
- the plasma head 11 includes a main body cover 20, an internal cable 22, a cable holder 24, a collar 25, a holder mounting device 26, an electrode holder 28, an electrode 30, a holder cover 31, and the like.
- the main body cover 20 functions as a housing and is made of a metal material.
- the main body cover 20 is generally cylindrical in shape. However, the main body cover 20 tapers downward, and the lower end of the main body cover 20 is conical in shape. Therefore, the lower end of the main body cover 20 functions as a nozzle 32 of the plasma head 11.
- the upper end of the main body cover 20 is fixed to the lower end of the cable holder 24.
- the internal cable 22 is arranged inside the body cover 20 so as to extend in the axial direction of the body cover 20, and is fixed inside the body cover 20 by a cable holder 24.
- the cable holder 24 is generally cylindrical and is fixedly fitted inside the body cover 20.
- the internal cable 22 is fixedly fitted into the upper end of the inside of the cable holder 24.
- the internal cable 22 is fixed inside the body cover 20 by the cable holder 24.
- a gap 35 is formed between the inner surface of the cable holder 24 and the outer surface of the internal cable 22.
- the collar 25 is a stepped cylindrical shape, and is composed of a small diameter portion 36, a large diameter portion 37, and a step surface 38.
- the outer diameter of the small diameter portion 36 is smaller than the inner diameter of the cable holder 24.
- the small diameter portion 36 is inserted into the cable holder 24, and the lower end of the small diameter portion 36 extends slightly downward from the lower end of the cable holder 24.
- the step surface 38 connects the small diameter portion 36 and the large diameter portion 37, and is located below the cable holder 24.
- An O-ring 39 is disposed along the outer circumferential surface of the small diameter portion 36 between the lower end surface of the cable holder 24 and the step surface 38.
- the outer diameter of the large diameter portion 37 is smaller than the inner diameter of the main body cover 20, and is located inside the main body cover 20.
- the holder mounting device 26 is annular, and the outer diameter of the holder mounting device 26 is the same as the outer diameter of the large diameter portion 37 of the collar 25.
- the holder mounting device 26 is disposed below the large diameter portion 37 of the collar 25.
- a screw groove is formed on the inner peripheral surface of the annular holder mounting device 26, and the inner peripheral surface of the holder mounting device 26 functions as a screw hole.
- the outer edge of the holder mounting device 26 is formed with a plurality of through holes 40 that penetrate in the vertical direction. The plurality of through holes 40 are inclined at a predetermined angle.
- the electrode holder 28 is made of a metal material and is generally cylindrical in shape. However, the electrode holder 28 tapers downward, and a convex portion 46 is formed in the center of the upper end surface of the electrode holder 28. A screw thread is formed on the outer circumferential surface of the convex portion 46. Therefore, the convex portion 46 of the electrode holder 28 is inserted into the inner circumferential surface that functions as a screw hole of the holder mounting fixture 26 and screwed in, whereby the electrode holder 28 is detachably mounted to the holder mounting fixture 26.
- the inner surface of the electrode holder 28 has a stepped shape.
- the upper part of the inner surface of the electrode holder 28 is a first inner surface 50 with a small diameter
- the lower part of the inner surface of the electrode holder 28 continuing from the first inner surface 50 is a second inner surface 52 with a larger diameter than the first inner surface 50.
- the lower end of a crimp terminal 56 is inserted into the first inner surface 50.
- the outer diameter of the lower end of the crimp terminal 56 is slightly smaller than the inner diameter of the first inner surface 50 of the electrode holder 28. Therefore, the crimp terminal 56 is fixed to the first inner surface 50 of the electrode holder 28 by a hollow bolt 58.
- a radially extending horizontal hole 60 is formed on the upper end side of the electrode holder 28, and the horizontal hole 60 is connected to the first inner surface 50.
- the hollow bolt 58 is screwed into the horizontal hole 60, and the crimp terminal 56 is fixed to the first inner surface 50 of the electrode holder 28.
- the depth of the horizontal hole 60 is greater than the length of the hollow bolt 58. Therefore, when the hollow bolt 58 is screwed into the horizontal hole 60, it is embedded in the horizontal hole 60 and is not exposed to the outside from the surface of the electrode holder 28.
- the crimp terminal 56 extends upward from the upper end of the first inner surface 50 of the electrode holder 28.
- the crimp terminal 56 extending upward from the first inner surface 50 of the electrode holder 28 is connected to the internal cable 22 by a conductor 62.
- the electrode 30 has a round bar shape, and the outer diameter of the electrode 30 is slightly smaller than the inner diameter of the second inner surface 52 of the electrode holder 28.
- the electrode 30 is inserted into the second inner surface 52 of the electrode holder 28, and is fixed to the second inner surface 52 of the electrode holder 28 by an enamel bolt 66.
- a radially extending horizontal hole 68 is formed on the lower end side of the electrode holder 28, and the horizontal hole 68 is connected to the second inner surface 52.
- the enamel bolt 66 is screwed into the horizontal hole 68, thereby fixing the electrode 30 to the second inner surface 52 of the electrode holder 28.
- the depth dimension of the horizontal hole 68 is longer than the length dimension of the enamel bolt 66.
- the enamel bolt 66 is embedded in the horizontal hole 68 when screwed into the horizontal hole 68, and is not exposed to the outside from the surface of the electrode holder 28. Additionally, the electrode 30 is fixed to the second inner circumferential surface 52 with the lower end, i.e., the tip, of the electrode 30 extending a predetermined amount (e.g., 3 to 5 mm) from the lower end of the electrode holder 28.
- the holder cover 31 is generally cylindrical, and the inner diameter of the holder cover 31 is slightly larger than the outer diameter of the large diameter portion 37 of the collar 25 and the outer diameter of the holder mounting fixture 26.
- the large diameter portion 37 of the collar 25 and the holder mounting fixture 26 are inserted inside the holder cover 31.
- the holder cover 31 is fixed to the cable holder 24 at its upper end. Meanwhile, a flange 70 extending inward is formed at the lower end of the holder cover 31. With this structure, the large diameter portion 37 of the collar 25 and the holder mounting fixture 26 are sandwiched between the lower end surface of the cable holder 24 and the flange 70 of the holder cover 31.
- the large diameter portion 37 of the collar 25 and the holder mounting fixture 26 are sandwiched between the lower end surface of the cable holder 24 and the flange 70 of the holder cover 31, and the electrode holder 28 is held by the holder cover 31.
- the large diameter portion 37 of the collar 25 and the holder mounting fixture 26 are biased toward the flange 70 of the holder cover 31 by the elastic force of the O-ring 39.
- the holder cover 31 fixed to the holder mounting fixture 26 is biased downward by the elastic force of the O-ring 39.
- the outer diameter of the holder cover 31 is smaller than the inner diameter of the main body cover 20, and is located inside the main body cover 20.
- Gas supply unit 15B is connected to gap 35 between the inner circumferential surface of cable holder 24 and the outer circumferential surface of internal cable 22 via gas tube 19 (see FIG. 1), and reactive gas supplied from gas supply unit 15B flows into gap 35 between the inner circumferential surface of cable holder 24 and the outer circumferential surface of internal cable 22.
- the reactive gas then flows downward and flows around electrode holder 28 through multiple through holes 40 of holder mounting fixture 26.
- multiple through holes 40 are inclined at a predetermined angle, so that when reactive gas passes through multiple through holes 40, it is rectified at a predetermined angle.
- the reactive gas rectified by multiple through holes 40 flows further downward and also flows around electrode 30 extending from the lower end of electrode holder 28, and reaches nozzle 32 of body cover 20.
- the reaction gas flows from the gap 35 between the inner surface of the cable holder 24 and the outer surface of the internal cable 22 inside the body cover 20, through the multiple through holes 40 in the holder mounting fixture 26, around the electrode holder 28 and the electrode 30 extending from the lower end of the electrode holder 28, and reaches the nozzle 32 of the body cover 20.
- Oxygen (O2) can be used as the reactive gas (seed gas).
- the gas supply unit 15B flows a mixed gas of oxygen and nitrogen (N2) (e.g., dry air (Air)) into the gap 35 between the inner circumferential surface of the cable holder 24 and the outer circumferential surface of the internal cable 22 via a gas tube 19 (see FIG. 1).
- N2 e.g., dry air (Air)
- this mixed gas may be referred to as the reactive gas
- oxygen may be referred to as the seed gas.
- a voltage is applied from the power supply unit 15A of the control box 15 to the electrode 30 extending from the lower end of the electrode holder 28. More specifically, power is supplied from the power supply unit 15A of the control box 15 to the internal cable 22 of the plasma head 11 via the power cable, and power is supplied to the conductor 62 and the crimp terminal 56. Then, the power supplied to the crimp terminal 56 flows to the electrode 30 via the electrode holder 28. In this way, the power is supplied to the electrode 30, and a voltage is applied to the electrode 30. At this time, as shown in FIG. 5, a pseudo arc A is generated from the tip of the electrode 30 by applying a voltage to the electrode 30.
- the pseudo arc A is generated along the flow of the reactive gas, it is generated downward from the tip of the electrode 30 and reaches the tip of the nozzle 32. Therefore, a pseudo arc A is generated between the tip of the electrode 30 and the tip of the nozzle 32. Then, when the reactive gas passes through the pseudo arc A generated between the tip of the electrode 30 and the tip of the nozzle 32, the reactive gas is turned into plasma. Therefore, a pseudo-arc A discharge occurs between the tip of the electrode 30 and the tip of the nozzle 32, turning the reactive gas into plasma and generating plasma gas. In other words, inside the reaction chamber 76 partitioned by the main body cover 20, the reactive gas is turned into plasma and plasma gas is generated.
- plasma gas is generated by discharge occurring between the tip of the electrode 30 and the tip of the nozzle 32, and is ejected from the opening 32A formed at the tip of the nozzle 32. Then, as the plasma gas is ejected from the opening 32A of the nozzle 32, plasma processing is performed on the workpiece W.
- the tip of the electrode 30 wears out. For this reason, in the plasma head 11, the extension amount of the tip of the electrode 30 from the electrode holder 28 can be adjusted by the hollow bolt 66, and the electrode 30 can also be replaced.
- the extension amount of the tip of the electrode 30 from the electrode holder 28 is adjusted so that the tip of the electrode 30 extends a predetermined amount (e.g., 3 to 5 mm) from the lower end of the electrode holder 28.
- the hollow bolt 66 is loosened from being screwed into the horizontal hole 68, and the extension amount of the tip of the electrode 30 from the electrode holder 28 is adjusted to a predetermined amount (e.g., 3 to 5 mm).
- the amount of extension of the tip of the electrode 30 from the electrode holder 28 becomes less than a predetermined amount
- the amount of extension of the tip of the electrode 30 from the electrode holder 28 is adjusted.
- the hollow bolt 66 is loosened from being screwed into the horizontal hole 68, and the electrode 30 is lowered so that the amount of extension of the tip of the electrode 30 from the electrode holder 28 becomes a predetermined amount.
- the hollow bolt 66 is screwed into the horizontal hole 68 and the electrode 30 is fixed inside the electrode holder 28.
- the electrode 30 becomes shorter, and the electrode 30 cannot be fixed by the hollow bolt 66. That is, for example, when the length dimension of the electrode 30 becomes the same as the length dimension between the lower end surface of the electrode holder 28 and the formation position of the horizontal hole 68, the electrode 30 cannot be fixed by the hollow bolt 66 with the tip of the electrode 30 extending from the lower end of the electrode holder 28. In this way, when the electrode 30 cannot be fixed by the hollow bolt 66, the electrode 30 is replaced. That is, the hollow bolt 66 is loosened from being screwed into the horizontal hole 68, and the used electrode 30 is pulled out from the second inner peripheral surface 52 of the electrode holder 28. Then, a new electrode 30 is inserted into the second inner peripheral surface 52 of the electrode holder 28, and the new electrode 30 is fixed inside the electrode holder 28 by the hollow bolt 66.
- the multiple through holes 40 formed in the holder mounting fixture 26 are inclined to rectify the reaction gas. For this reason, multiple holder mounting fixtures 26 with different inclination angles of the through holes 40 are prepared, and the holder mounting fixture 26 is replaced to adjust the rectification angle of the reaction gas, etc.
- the holder mounting fixture 26 is removably screwed into the convex portion 46 of the electrode holder 28, so the holder mounting fixture 26 is replaced by removing the holder mounting fixture 26 from the convex portion 46 and attaching a holder mounting fixture 26 different from the removed holder mounting fixture 26 to the convex portion 46.
- the extension amount of the electrode 30 can be adjusted and the electrode 30 and the holder mounting fixture 26 can be replaced.
- the extension amount of the electrode 30 is adjusted and the electrode 30 and the holder mounting fixture 26 are replaced, the main body cover 20 and the holder cover 31 are removed from the cable holder 24, but compared to conventional plasma heads, in the plasma head 11, the extension amount of the electrode 30 can be adjusted and the electrode 30 and the holder mounting fixture 26 can be replaced more easily.
- the conventional plasma head 100 includes a body cover 110, an internal cable 112, a cable holder 114, a collar 115, a holder mounting fixture 116, an electrode holder 118, an electrode 120, a holder cover 122, a crimp terminal 124, and a conductor 126.
- the body cover 110 functions as a housing and is made of a metal material.
- the body cover 110 has the same shape as the body cover 20 of the plasma head 11, and the lower end of the body cover 20 functions as a nozzle 128.
- the body cover 110 is fixed to the lower surface of the cable holder 114 by six bolts 132 (only four are shown in the figure) at the flange portion 130 at the upper end.
- the internal cable 112, cable holder 114, collar 115, holder mounting fixture 116, electrode holder 118, electrode 120, holder cover 122, crimp terminal 124, and conductor 126 have substantially the same structure as the internal cable 22, cable holder 24, collar 25, holder mounting fixture 26, electrode holder 28, electrode 30, holder cover 31, crimp terminal 56, and conductor 62 of the plasma head 11, so a description thereof will be omitted.
- the electrode 120, crimp terminal 124, and electrode holder 118 of the conventional plasma head 100 the electrode 120 is fixed inside the electrode holder 118 by a hollow bolt 136, and the crimp terminal 124 is fixed inside the electrode holder 118 by a hollow bolt 138.
- the holder cover 31 of the plasma head 11 is fixed to the cable holder 24, but the holder cover 122 of the conventional plasma head 100 is not fixed to the cable holder 114.
- the worker when adjusting the extension amount of the electrode 120 or replacing the electrode 120 and the holder mounting device 116, the worker removes the six bolts (only four are shown in the figure) 132 with a tool such as a screwdriver, as shown in FIG. 8. This removes the main body cover 110 from the cable holder 114, exposing the electrode holder 118. Therefore, the worker can adjust the extension amount of the electrode 120 and replace the electrode 120 by operating the hollow bolt 136.
- the holder cover 122 since the holder cover 122 is not fixed to the cable holder 114, when the main body cover 110 is removed from the cable holder 114, the holder cover 122 detaches from the cable holder 114 due to its own weight.
- the worker operates the hollow bolt 138 to remove the electrode holder 118 from the plasma head 100. In this manner, by removing the electrode holder 118 from the plasma head 100, the holder mounting fixture 116 attached to the electrode holder 118 is replaced.
- an operator removes the six bolts 132 with a tool to remove the main body cover 110 from the cable holder 114, adjust the extension amount of the electrode 120, and replace the electrode 120 and the electrode holder 118.
- the holder cover 122 comes off and the electrode holder 118 is no longer held by the holder cover 122.
- the electrode holder 118 is suspended in mid-air and supported by the conductor 126, as shown in FIG. 9.
- the collar 115 is clamped between the underside of the cable holder 114 and the holder mounting fixture 116.
- the main body cover 20 can be attached to the cable holder 24 without using tools. More specifically, as shown in FIG. 10, a male thread 150 is formed on the outer peripheral surface of the lower end portion of the cable holder 24. Meanwhile, a female thread 152 is formed on the inner peripheral surface of the upper end portion of the main body cover 20. Then, the worker rotates the main body cover 20 in the direction of the arrow 154 (clockwise direction) and screws the male thread 150 and the female thread 152 together, thereby attaching the main body cover 20 to the cable holder 24. This allows the worker to easily attach the main body cover 20 to the cable holder 24 without using tools.
- the worker rotates the main body cover 20 in the direction of the arrow 156 (counterclockwise direction) to release the screws between the male thread 150 and the female thread 152, thereby removing the main body cover 20 from the cable holder 24.
- This allows the worker to easily remove the main body cover 20 from the cable holder 24 without using tools.
- the operator can attach and detach the main body cover 20 to and from the cable holder 24 simply by rotating the main body cover 20 on its axis without using any tools.
- the holder cover 31 can also be attached to the cable holder 24 without using tools.
- the holder cover 31 has three equally spaced recesses 160 cut into an L-shape at the upper end.
- the recesses 160 are composed of a first notch 162 extending in the vertical direction and a second notch 164 extending in a direction perpendicular to the first notch 162.
- the tip of the second notch 164 has a slight upward recess 166.
- three pins 168 (two pins 168 are shown in FIG. 12) are erected on the outer peripheral surface of the lower end of the cable holder 24 at three equally spaced positions below the male thread 150.
- the operator moves the holder cover 31 in the direction of the arrow 170 (upward) to insert the pins 168 into the first notch 162 of the recess 160.
- the worker rotates the holder cover 31 in the direction of the arrow 172 (clockwise direction), so that the pin 168 is inserted into the second notch 164 of the recess 160 and latched.
- This allows the worker to easily attach the holder cover 31 to the cable holder 24 without using tools.
- the worker rotates the holder cover 31 in the direction of the arrow 174 (counterclockwise direction), so that the pin 168 is released from the second notch 164.
- the worker moves the holder cover 31 in the direction of the arrow 176 (downward direction), so that the pin 168 is removed from the first notch 162.
- This allows the worker to easily remove the holder cover 31 from the cable holder 24 without using tools. In this way, the worker can attach and detach the holder cover 31 to and from the cable holder 24 without using tools.
- the holder cover 31 is biased downward by the elastic force of the O-ring 39. In other words, the holder cover 31 is biased in the direction opposite to the insertion direction of the holder cover 31 by the elastic force of the O-ring 39.
- the main body cover 20 and the holder cover 31 can be attached to the cable holder 24 without using tools, so that the extension amount of the electrode 30 can be adjusted and the electrode 30 and the holder attachment device 26 can be conveniently replaced.
- the operator rotates the main body cover 20 in the direction of the arrow 156 (counterclockwise direction), so that the main body cover 20 is removed from the cable holder 24.
- the holder cover 31 is fixed to the cable holder 24 by the pin 168 and the recess 160. Therefore, as shown in FIG. 10, when the main body cover 20 is removed from the cable holder 24, the electrode holder 28 is exposed together with the holder attachment device 26 held by the holder cover 31.
- the operator can adjust the extension amount of the electrode 30 and replace the electrode 30 by operating the hollow bolt 66 on the electrode holder 28 held by the holder cover 31.
- This allows the plasma head 11 to adjust the extension amount of the electrode 30 and replace the electrode 30 without placing a load on the conductor 62.
- the operator can remove the main body cover 20 from the cable holder 24 without using tools to expose the electrode holder 28, reducing the burden on the operator when adjusting the extension amount of the electrode 30 and replacing the electrode 30 and shortening the work time.
- there are no small parts such as the bolts 132, loss of parts can be prevented.
- the main body cover 20 is attached to the cable holder 24 by a screwing mechanism
- the holder cover 31 is attached to the cable holder 24 by a mechanism that hooks the pin 168 into the recess 160. Therefore, when an operator rotates the main body cover 20 to remove it from the cable holder 24, the holder cover 31 can be prevented from rotating together with the main body cover 20. That is, for example, when the holder cover 31 is attached to the cable holder 24 by a screwing mechanism, there is a risk that the holder cover 31 will rotate together with the main body cover 20 when an operator rotates the main body cover 20 to remove it from the cable holder 24.
- the crimp terminal 56 will rotate together with the holder mounting device 26 inside the holder cover 31, and the conductor 62 may be twisted and broken.
- the holder cover 31 is attached to the cable holder 24 by a mechanism other than the screwing mechanism. This prevents the holder cover 31 from rotating along with the main body cover 20 when the worker rotates the main body cover 20 to remove it from the cable holder 24, preventing breakage of the conductor 62.
- the electrode holder 28 is held by the holder cover 31 together with the holder mounting fixture 26, it is necessary to remove the holder cover 31 from the cable holder 24 when replacing the holder mounting fixture 26. Therefore, when replacing the holder mounting fixture 26, the worker removes the main body cover 20 from the cable holder 24, and then rotates the holder cover 31 in the direction of the arrow 174 and moves it in the direction of the arrow 176 as shown in FIG. 12 to remove the holder cover 31 from the cable holder 24. As a result, the electrode holder 28 is no longer held by the holder cover 31. Then, the worker operates the hollow bolt 58 to remove the electrode holder 28 from the plasma head 11 and replace the holder mounting fixture 26.
- the plasma head 11 is an example of a plasma generating device.
- the body cover 20 is an example of a body cover.
- the cable holder 24 is an example of a base.
- the electrode holder 28 is an example of a holder.
- the electrode 30 is an example of an electrode.
- the holder cover 31 is an example of a holder cover.
- the O-ring 39 is an example of an elastic body.
- the reaction chamber 76 is an example of a reaction chamber.
- the male thread 150 is an example of an engaged portion and a male thread.
- the female thread 152 is an example of an engaged portion and a female thread.
- the recess 160 is an example of an engaging portion and a recess.
- the first notch 162 is an example of a first notch.
- the second notch 164 is an example of a second notch.
- the pin 168 is an example of an engaged portion and a protrusion.
- this embodiment provides the following advantages:
- the plasma head 11 comprises a body cover 20 that defines the reaction chamber 76 and functions as a housing, and a cable holder 24 to which the body cover 20 is removably attached.
- the engagement portion of the body cover 20 is attached to the latched portion of the cable holder 24. This allows the body cover 20 to be easily attached and detached from the cable holder 24.
- a male thread 150 is formed on the cable holder 24 as the engaged portion
- a female thread 152 is formed on the main body cover 20 as the engaging portion.
- the main body cover 20 is attached to the cable holder 24 by screwing the male thread 150 into the female thread 152. This allows the operator to attach and detach the main body cover 20 to and from the cable holder 24 simply by rotating the main body cover 20 on its axis.
- the plasma head 11 also includes an electrode 30 that generates a discharge inside the reaction chamber 76, an electrode holder 28 that detachably holds the electrode 30, and a holder cover 31 for fixing the electrode holder 28 inside the main body cover 20.
- the locking portion of the holder cover 31 is attached to the locked portion of the cable holder 24. This allows the electrode holder 28 to be easily held by the holder cover 31.
- a recess 160 is formed in the holder cover 31 as an engaging portion
- a pin 168 is formed in the cable holder 24 as an engaged portion.
- the holder cover 31 is attached to the cable holder 24 by engaging the pin 168 with the recess 160. This allows the holder cover 31 to be attached to the cable holder 24 with a simple structure.
- the recess 160 is composed of a first notch 162 extending in the insertion direction of the holder cover 31 and a second notch 164 extending in a direction intersecting the insertion direction.
- the holder cover 31 is attached to the cable holder 24 by hooking the pin 168 into the second notch 164 of the recess 160.
- the plasma head 11 is also provided with an O-ring 39 that biases the holder cover 31 in the direction opposite to the insertion direction of the holder cover 31. Therefore, the pin 168 hooked into the second notch 164 is biased by the elastic force of the O-ring 39 toward the wall surface that defines the second notch 164. This ensures that the pin 168 is hooked into the second notch 164, that is, that the holder cover 31 is attached to the cable holder 24.
- the present disclosure is not limited to the above embodiment, and can be implemented in various forms with various modifications and improvements based on the knowledge of a person skilled in the art.
- the main body cover 20 is attached to the cable holder 24 by a screw mechanism
- the holder cover 31 is attached to the cable holder 24 by a hook mechanism that hooks the pin 168 to the recess 160.
- the holder cover 31 may be attached to the cable holder 24 by a screw mechanism
- the main body cover 20 may be attached to the cable holder 24 by a hook mechanism.
- main body cover 20 and the holder cover 31 may be attached to the cable holder 24 by a screw mechanism, and the main body cover 20 and the holder cover 31 may be attached to the cable holder 24 by a hook mechanism.
- various mechanisms can be adopted as long as they are not limited to the screw mechanism and the hook mechanism and can attach the main body cover 20 and the holder cover 31 to the cable holder 24 without using tools.
- a quick joint, a mechanism that utilizes the structure of a so-called coupler (registered trademark), a push lock mechanism, a cam lock mechanism, etc. can be used.
- the holder cover 31 is biased in the direction opposite to the insertion direction of the holder cover 31 by the elastic force of the O-ring 39, but the holder cover 31 may be biased in the insertion direction of the holder cover 31. That is, for example, a tension spring or the like may be disposed between the holder cover 31 and the cable holder 24 to bias the holder cover 31 in the insertion direction of the holder cover 31. In this way, even if the holder cover 31 is biased in the insertion direction of the holder cover 31, the same effect can be obtained as when the holder cover 31 is biased in the direction opposite to the insertion direction of the holder cover 31.
- a discharge is generated between the tip of the electrode 30 and the tip of the main body cover 20 to convert the processing gas into plasma.
- a discharge is generated by one electrode 30.
- a discharge may be generated between multiple electrodes.
- An electrode holder 28 that holds at least one of the multiple electrodes is held by a holder cover 31.
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Abstract
Description
Claims (5)
- 反応室を区画するとともに、筐体として機能し、係合部を有する本体カバーと、
前記本体カバーが着脱可能に取り付けられ、被係合部を有するベースと、
を備え、
前記本体カバーの係合部が前記ベースの被係合部に取り付けられるプラズマ発生装置。 - 前記本体カバーに前記係合部として雄ねじと雌ねじとの一方が形成され、
前記ベースに前記被係合部として前記雄ねじと前記雌ねじとの他方が形成されており、
前記雄ねじと前記雌ねじとがねじ止めされることで、前記本体カバーが前記ベースに取り付けられる請求項1に記載のプラズマ発生装置。 - 前記反応室の内部で放電を発生させる電極と、
前記電極を着脱可能に保持するホルダと、
前記ホルダを前記本体カバーの内部において固定するための、係止部を有するホルダカバーと、
を備え、
前記ホルダカバーの係止部が、前記ベースが有する被係止部に取り付けられる請求項1または請求項2に記載のプラズマ発生装置。 - 前記ホルダカバーに前記係止部として凸部と凹部との一方が形成され、
前記ベースに前記被係止部として前記凸部と前記凹部との他方が形成されており、
前記凸部と前記凹部とを掛け止めることで、前記ホルダカバーが前記ベースに取り付けられる請求項3に記載のプラズマ発生装置。 - 前記凹部は、前記ホルダカバーの挿入方向に延びる第1切欠部と、前記挿入方向と交差する方向に延びる第2切欠部とにより構成されており、
前記凸部を前記凹部の前記第2切欠部に掛け止めることで、前記ホルダカバーが前記ベースに取り付けられ、
前記挿入方向と前記挿入方向の反対方向との一方に前記ホルダカバーを付勢する弾性体を備える請求項4に記載のプラズマ発生装置。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2024565426A JPWO2024134747A1 (ja) | 2022-12-20 | 2022-12-20 | |
| PCT/JP2022/046793 WO2024134747A1 (ja) | 2022-12-20 | 2022-12-20 | プラズマ発生装置 |
| CN202280101552.4A CN120153765A (zh) | 2022-12-20 | 2022-12-20 | 等离子体产生装置 |
| DE112022008106.6T DE112022008106T5 (de) | 2022-12-20 | 2022-12-20 | Plasmaerzeugungsvorrichtung |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2022/046793 WO2024134747A1 (ja) | 2022-12-20 | 2022-12-20 | プラズマ発生装置 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024134747A1 true WO2024134747A1 (ja) | 2024-06-27 |
Family
ID=91588068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2022/046793 Ceased WO2024134747A1 (ja) | 2022-12-20 | 2022-12-20 | プラズマ発生装置 |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPWO2024134747A1 (ja) |
| CN (1) | CN120153765A (ja) |
| DE (1) | DE112022008106T5 (ja) |
| WO (1) | WO2024134747A1 (ja) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5101088A (en) * | 1987-07-16 | 1992-03-31 | S P T Plasmateknik Aktiebolag | Torch for plasma cutting and welding, including means for centering and clamping the electrode |
| JPH08206841A (ja) * | 1995-01-31 | 1996-08-13 | Komatsu Sanki Kk | プラズマトーチ |
| JP2004268089A (ja) * | 2003-03-07 | 2004-09-30 | Reitekku:Kk | スチームプラズマトーチ |
-
2022
- 2022-12-20 CN CN202280101552.4A patent/CN120153765A/zh active Pending
- 2022-12-20 WO PCT/JP2022/046793 patent/WO2024134747A1/ja not_active Ceased
- 2022-12-20 JP JP2024565426A patent/JPWO2024134747A1/ja active Pending
- 2022-12-20 DE DE112022008106.6T patent/DE112022008106T5/de active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5101088A (en) * | 1987-07-16 | 1992-03-31 | S P T Plasmateknik Aktiebolag | Torch for plasma cutting and welding, including means for centering and clamping the electrode |
| JPH08206841A (ja) * | 1995-01-31 | 1996-08-13 | Komatsu Sanki Kk | プラズマトーチ |
| JP2004268089A (ja) * | 2003-03-07 | 2004-09-30 | Reitekku:Kk | スチームプラズマトーチ |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112022008106T5 (de) | 2025-11-06 |
| CN120153765A (zh) | 2025-06-13 |
| JPWO2024134747A1 (ja) | 2024-06-27 |
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