JPH057363U - High-pressure liquid ejector - Google Patents

Abstract

(57) [Abstract] [Purpose] In Japanese Patent Laid-Open No. 62-266152, an "ultra-high pressure liquid ejecting apparatus" relatively moves (main-scans) the entire ejecting apparatus and a workpiece, and at the same time, ejects an ejecting nozzle to the ejecting apparatus. A circular motion (sub scanning) is performed to achieve a wide machining surface. The high-pressure liquid ejecting apparatus of the present invention has both a wider processing surface and higher processing uniformity. [Structure] A large number of jet nozzles are arranged at intervals equal to or smaller than the diameter of a circular motion (sub-scan) in the direction perpendicular to the main scan, and these numerous jet nozzles are made to make small circular motions (sub-scan) at high speed. .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention is a solid powder (abrasive) from the injection nozzle to high pressure water or high pressure water. Spraying a dispersed material to clean, cut, deburr, and modify the surface of the workpiece. High-pressure liquid ejecting device for performing the above, more specifically, these processes are performed uniformly on the surface of the workpiece. It relates to a structure for efficient operation.

[0002]

[Prior art]

  Liquid with increased pressure, or solid powder (abrasive) dispersed in the liquid Is sprayed from the nozzle to form a high-speed liquid stream, which is sprayed directly on the surface of the work piece. Various high-pressure liquid ejectors that perform surface processing such as cleaning, cutting, deburring, surface modification, etc. It is commercialized. A general problem of such a high-pressure liquid ejecting apparatus is that the surface of the workpiece is processed. Higher processing uniformity, high work speed (efficiency), clean and efficient workability, Simple and compact device configuration, easy setting of processing conditions and wide setting range Etc.

[0003]   Especially in the case of a device that injects ultra-high pressure liquid, Due to the adverse effect of recoil, the liquid flow rate cannot be too large and the liquid ejected Since the flow is a needle-shaped thin flow, it is very difficult to uniformly process a wide surface. There is a problem that

[0004]   As one of the practical ultra-high-pressure liquid jetting devices, the applicant of the present invention has previously disclosed Japanese Patent Laid-Open No. Proposed "Ultra High Pressure Liquid Ejector" of 2-266152. The device is Rotating the nozzle to scan the ejected liquid flow in a conical shape (sub-scanning) and simultaneously to the workpiece. Then, the entire device including the injection nozzle is moved relatively (main scanning), like a milling machine. This is used to machine the work piece, and the processing width of one main scan is expanded to the diameter of the sub-scan. Be overwhelmed. The device offers a combination of thin nozzles, low liquid flow and high liquid pressure. It enables efficient and uniform surface processing with high workability.

[0005]   Here, the mechanism that sub-scans the ejected liquid flow in a conical shape is such that the liquid path is self-contained with respect to the housing. A bearing mechanism that supports a conical rotation that does not involve rolling and a liquid path that is fixed to the liquid path. Turbine motor driven by the liquid stream branched from the turbine and the power of the turbine motor Eccentricity when the liquid path is conically rotated, which consists of a gear mechanism that transmits the The load is offset by the self-weight of the turbine motor.

[0006]

[Problems to be solved by the device]

  In the apparatus of Japanese Patent Laid-Open No. 62-266152, the turbine motor is a liquid path. Since it rotates conically with respect to the housing, it is difficult to adjust the rotation speed of the turbine motor. It's difficult. The rotation speed is adjusted by adjusting the liquid supply pressure or the liquid flow and the turbine blade. Although it depends on the adjustment of the collision angle, changing the liquid pressure directly affects the machining ability. It is inconvenient, so when adjusting the turbine blade, the adjustment and rotation should be performed while the device is operating (injection). In addition to the fact that it is impossible to continuously adjust the number of revolutions and specify the specific number of revolutions, The available setting range is narrow.

[0007]   Also, since the eccentric load in the conical rotation is canceled out, the vibration of the housing itself is small. Although the inertia moment including the turbine motor is considerably large, Difficult to roll and the rise of rotation speed is slow. Therefore, reduce the radius of conical rotation to Although it was thought to reduce the momentum, the structural limitation of the turbine motor Therefore, it is not easy to reduce the radius of conical rotation. Also, as the radius of conical rotation is reduced, Therefore, the width of sub-scanning is reduced, and the working width per main scanning is narrowed, resulting in work efficiency. The problem arises that

[0008]

[Means for Solving the Problems]

  The present invention makes it easy to adjust the sub-scanning rotation speed without affecting the machining capacity. The rotation speed can be adjusted independently of the liquid pressure, and the rotation speed can be adjusted while the device is in operation. It is possible to continuously adjust the rotation speed and specify the specific rotation speed. Wide constant range, high-speed rotation is possible, speed of rotation rises quickly, and one main scan To provide a high-pressure liquid ejector with a wide processing width and high processing uniformity. Has an aim.

[0009]   The high-pressure liquid ejecting apparatus according to claim 1 does not rotate on the liquid path for supplying the high-pressure liquid. It has a sub-scanning mechanism that revolves around orbits, and performs main scanning relative to the workpiece. A high-pressure liquid ejecting apparatus that performs surface processing by ejecting high-pressure liquid through the liquid path In the direction perpendicular to the main scan, a large number of injection nozzles are arranged at intervals less than the diameter of the revolution. It is arranged.

[0010]   The high-pressure liquid ejecting apparatus according to claim 2 is the high-pressure liquid ejecting apparatus according to claim 1, wherein The inspection mechanism rotates the hydraulic motor fixed to the housing and the liquid path with respect to the housing. A support mechanism that rotatably supports a conical rotation and a hydraulic motor on one rotation section of the conical rotation. The transmission mechanism that transmits the power of the rotor to the support mechanism and the liquid passage within one rotation section of the conical rotation. And a counterweight having a center of gravity on the opposite side of the road.

[0011]   The high-pressure liquid ejecting apparatus according to claim 3 is the high-pressure liquid ejecting apparatus according to any one of claims 1 and 2. At this time, hydraulic oil is supplied to the high-pressure piping for supplying the high-pressure liquid to the liquid path and the hydraulic motor. Alternatively, a pair of hydraulic pipes to be discharged are arranged in parallel in the protective pipe, and the protective pipe is used to form the casing. Is supported to perform the main scanning.

[0012]

[Action]

  In the high-pressure liquid ejecting apparatus according to claim 1, it is integrally mounted in a direction perpendicular to the main scanning. A large number of ejected nozzles are revolved (sub-scanning) at a small speed by a sub-scanning mechanism. As a result, a large number of small-diameter end mills that rotate at high speed are arranged side by side. A wide processing width per main scanning is achieved so as to perform processing. Sub-scan rotation Since the radius is small, the inertia moment is small and high speed rotation is possible. Of injection nozzle The arrangement interval is determined in consideration of the spray spread angle, the workpiece-nozzle distance, etc. If the diameter is at least less than the diameter of the revolution, and it is difficult to arrange them in one line, stagger 2 You may arrange in 3 rows. However, if the injection nozzle becomes large, inertial moment Is increased, making it difficult to rotate at high speed and suppressing vibration of the device. The weight of the entire revolving part is reduced by selection. The ejection nozzles should be placed at intervals If the spray density per unit time in the angular direction is set to be uniform, the processing uniformity will be improved. And good results are obtained.

[0013]   In the high-pressure liquid ejecting apparatus according to claim 2, the hydraulic motor is fixed to the casing to form the liquid. Inertia moment is smaller because it is independent of the conical movement of the path, and the hydraulic motor The flow rate and hydraulic pressure of the hydraulic fluid of the change in a wide range irrespective of the supply pressure of the injection liquid Therefore, the rotational speed of the hydraulic motor can be set to any value even during operation of the device (during injection). Can be specified. The hydraulic motor itself is difficult to rotate at high speed, so The ratio transmission mechanism is used to secure the revolution speed (sub-scanning) of the injection nozzle. Support The mechanism supports the liquid path, and the liquid path is conical with respect to the housing by the power of the hydraulic motor. Rotate. At this time, since the liquid path does not rotate, No mechanism is needed. The transmission mechanism has a fixed interval on one rotation section of the conical rotation. Power is transmitted between the two shafts (the shaft of the hydraulic motor and the shaft of the conical rotation section). Transmitter As the structure, gears, timing belts, flat belts, friction wheels, etc. can be adopted. balance The weight (counter-balancer) is eccentric due to the conical rotation of the liquid path, injection nozzle, etc. The load is offset to suppress the vibration of the housing.

[0014]   In the high-pressure liquid ejecting apparatus according to claim 3, a high-pressure pipe arranged in the protection pipe is passed through. Then, the high pressure liquid is supplied to the liquid path, and it operates to the hydraulic motor through one hydraulic pipe. Oil is supplied, and hydraulic oil is discharged from the hydraulic motor through the other hydraulic pipe. Protection The protection tube supports the entire device including the housing and moves as a robot arm. (Main scanning) is performed. However, if the workpiece side is moved (main scanning), work It may be fixed to the ceiling of the room.

[0015]

【Example】

  An embodiment of the present invention will be described with reference to the drawings.

[0016]   1 to 4 are explanatory views of a deburring device of an embodiment, and FIG. 1 is a deburring device. Schematic diagram of the whole, FIG. 2 is a cross-sectional view of the main body of the ultra-high pressure water injection device, and FIG. 3 is a nozzle holder part. FIG. 4 is an enlarged view of a portion of FIG. The deburring device of the embodiment has an extremely high Pressurized water is jetted from the nozzle N, and the nozzle holder-H is rotated conically with respect to the main body T (subordinate (Main scanning), the main body T is supported by the support tube E and moved (main scanning) to move the automobile part A. This is a device for cleaning and deburring the surface of.

[0017]   In FIG. 1, a nozzle holder H to which a large number of nozzles N are attached is a hydraulic motor. It is driven by the rotor M and rotates in a conical shape with respect to the main body T. Support tube that supports the body T E is fixed to and supported by the robot arm R via the sleeve R1. Support tube E Inside, a water conduit for guiding the super high pressure water to the main body T, and the hydraulic oil to the hydraulic motor M A pair of hydraulic pipes are provided for this purpose (see FIG. 4), and the water conduit and the body T are pressure resistant tubes Q. 1, the pair of hydraulic pipes and the hydraulic motor M are connected by the tubes P1 and P2. support At the other end of the water pipe in the pipe E, a pressure resistant tube Q2 leading to an ultra-high pressure water pump is provided with a pair of oils. Tubes P3 and P4 leading to a hydraulic pump are connected to the other end of the pressure pipe.

[0018]   In FIG. 2, the hose adapter D is provided approximately at the center of the main body T of the ultra-high pressure water injection device. 5, connector D4, flexible high-pressure hose D3, connector D2, shaft D A liquid path for guiding the super high pressure water to the nozzle holder H is arranged. ing. The shaft D1 has a boss in an eccentric hole W1 provided in the counter balancer W. The counter balancer W is supported by a ball bearing B2, and the counter balancer W is a ball bearing. It is supported concentrically in the body T by B1. Counter balancer for main body T-W The shaft D1 rotates in a conical shape with respect to the main body T as it rotates. It does not turn. Due to the conical rotation of the shaft D1 without rotation, the nozzle holder The da H also rotates, and the high-speed water jet (water jet) ejected from the nozzle N To be scanned.

[0019]   In the eccentric hole W1 provided in the counter balancer W, the central axis of the eccentric hole W1 is a high pressure hose. -The shaft D is formed so as to coincide with the central axis of the body T at the center of the shaft D3. The deflection of the liquid path due to the conical rotation of No. 1 is absorbed by the bending of the high-pressure hose D3. To be done. The center of gravity of the counter balancer W with respect to the central axis of the main body T is the nozzle holder. It is located on the opposite side of the center of gravity of the conical rotating parts such as the da H and the shaft D1. Also cow The deviation of the center of gravity of the center balancer W from the center of gravity of the conical rotating portion in the direction of the central axis varies. Counter supported by ball bearing B1 because it is offset by sensor G The balancer-W rotates as a whole with the center of gravity of the main body T coincident with the center of gravity and less vibration. Will be

[0020]   The hydraulic motor M fixed to the main body T is rotated by being supplied with hydraulic oil, and the ball bearing is rotated. The entire counter balancer-W supported by the ring B1 is driven. Hydraulic motor M The number of rotations of can be freely adjusted by the hydraulic oil supply pressure or flow rate. Maintains stable rotation speed by keeping pressure or flow rate constant. Hydraulic motor Although M has a large output torque, it is difficult to rotate at high speed, so counter balancer W As a mechanism for transmitting power to the gear, a combination of gears G1 and G2 with a large gear ratio is adopted. I am using. The gear G1 is the shaft of the hydraulic motor M, and the gear G2 is the counter balancer W. It is fixed to each.

[0021]   On the other hand, the main body T itself has a hollow upper portion T3 to which the hose adapter D5 is fixed and a hydraulic pressure. The motor M is fixed, and the entire counter balancer W is mounted via the ball bearing B1. The bearing case T2 for supporting and attaching the main body T to the support pipe E and the mechanism portion are covered. The front cover T1 and the shaft D1 The gap is sealed with water by a seal ring V fixed to the shaft D1.

[0022]   3, (a) is a sectional view taken along line XX of (b), and (b) is a plane viewed from the tip side of FIG. It is a figure. Nozzle holder H has a total of 25 nozzles N made of cemented carbide in a staggered pattern. Which are arranged in two rows and screwed together, and which is perpendicular to the direction of main scanning (arrow in Fig. 1) The substantial pitch p of the nozzle N in the direction is the diameter of the rotation at the position of the nozzle N. Approximately one half of that is set. A main water channel H1 is formed at the center of the nozzle holder-H. The nozzle N is attached to the female screw formed in each of the branch water passages H3 penetrating the main water passage H1. Are screwed together. At the center of the main waterway H1, connect the main waterway H1 to the waterway inside the shaft D1. A connector portion H2 for connection is formed. The diameter of the injection hole of the nozzle N is 0. It is 1 to 0.8 mm.

[0023]   In FIG. 4, (a) is a sectional view taken along line XX of (b), and (b) is a side view. Figure 2 body Inside the support pipe E that supports T, there is a central pressure-proof pipe EQ through which ultra-high pressure water is passed and a hydraulic pressure pipe EQ. -A pair of hydraulic pipes EP1 and EP2 for supplying and discharging the hydraulic oil are arranged in parallel. Has been done. The support pipe E is used to fix the pressure resistant pipe EQ and the hydraulic pipes EP1 and EP2. The block E2 and the lower block E3 are connected by a protective tube E1, and the upper block E 2 is a flange for fixing the display device, and the lower block E3 is for fixing the main body T. A female screw for forming is formed.

[0024]   In the deburring device of the embodiment configured in this way, the deburring device is arranged in the direction of the arrow in FIG. As the body T is moved (main scanning), the nozzle holder-H rotates about the body T. Performs circular motion (sub-scanning) without movement. 25 placed in the nozzle holder-H of FIG. Each nozzle N has a needle-shaped high-speed water flow (water jet) of 0.1 to 0.8 mm. Deburring while forming high speed circular motion on the surface of automobile part A with a small diameter Carry out. This makes it possible for a large number of small-diameter rotating high-speed rotating units arranged in parallel. The wide area on the upper surface of the automobile part A is uniform and works as if a hand mill was used. Deburred efficiently.

[0025]   In the above embodiments, deburring of automobile parts is performed by jetting ultra-high pressure water. Although only the apparatus has been described, the present invention is directed to high pressure water or solid particles (abrasive particles) in high pressure water. Spraying a dispersion of (reciprocal) to various workpieces other than automobile parts. Then, it can be applied to an apparatus for performing various surface machining other than deburring.

[0026]

[Effect of device]

  In the high-pressure liquid ejecting apparatus according to claim 1, the diameter of the circular motion of the sub-scan is small, and Since the nature moment is small, high-speed circular motion (rotation) is possible and the number of rotations rises quickly. Yes. Therefore, the surface processing can be efficiently performed, and the processing uniformity is high all the time. Also, many Several nozzles are arranged in a direction perpendicular to the main scan at a pitch less than or equal to the diameter of the circular motion of the sub-scan. Therefore, the processing width in one main scanning is wide, and the processing is uniform in the processing width. It is also very popular. Therefore, higher processing uniformity on the surface of the work piece, high working speed and Efficiency, efficient workability, and downsizing of the device configuration are achieved.

[0027]   In the high-pressure liquid ejecting apparatus according to the second aspect, it is easy to adjust the sub-scanning rotation speed, and The rotation speed can be adjusted independently of the liquid pressure without affecting the work capacity, It is possible to adjust the number of revolutions in the driving state, continuous adjustment of the number of revolutions and specific rotation The number of rotations can be specified easily, the rotation speed setting range is wide, and high-speed rotation is possible. The rise is even faster. Therefore, higher processing uniformity on the surface of the work piece, high Work speed and efficiency, clean and efficient workability, downsizing of device configuration, low failure rate ( High operating rate), easy setting of processing conditions and wide setting range are achieved.

[0028]   In the high-pressure liquid ejecting apparatus according to claim 3, the piping of the entire processing system is simplified. This reduces pressure fluctuations caused by the main scan of high-pressure liquid and hydraulic oil hydraulic oil. Depression caused by main scanning, damage to the pipe due to splashing of jetted liquid, etc. It is also prevented. Therefore, higher processing uniformity on the surface of the work piece, higher work Speed and efficiency, clean and efficient workability, downsizing of equipment configuration, low failure rate (high profitability) A high stability of working rate and processing conditions is achieved.

[Brief description of drawings]

FIG. 1 is a schematic view of an entire deburring apparatus of an embodiment.

FIG. 2 is a cross-sectional view of an ultra-high pressure water jet device body of the deburring device of the embodiment.

FIG. 3 is an enlarged view of a nozzle holder-portion of the deburring device of the embodiment.

FIG. 4 is a cross-sectional view of a protective tube portion of the deburring device of the embodiment.

[Explanation of symbols]

A automobile parts E support tube H nozzle holder N nozzle M hydraulic motor R robot arm T body R1 sleeve Q1 pressure resistant tube Q2 pressure resistant tube P1 tube P2 tube P3 tube P4 tube G balancer V seal ring W counter balancer B1 ball bearing B2 ball bearing D1 shaft D2 connector D3 High pressure hose D4 connector D5 hose adapter G1 gear G2 gear T1 front cover T2 bearing case T3 upper part W1 eccentric hole E1 protection tube E2 upper block E3 lower block H1 main waterway H2 connector part H3 branch waterway EQ pressure tube EP1 hydraulic pipe EP2 hydraulic pipe

Claims (3)

[Scope of utility model registration request] 1. A sub-scanning mechanism for causing the liquid path for supplying the high-pressure liquid to revolve without rotation, wherein a main scanning is performed relative to the workpiece to eject the high-pressure liquid through the liquid path. A high-pressure liquid ejecting apparatus that performs surface processing, wherein a large number of ejecting nozzles are arranged in a direction perpendicular to the main scanning at intervals equal to or smaller than the diameter of the revolution. 2. The high-pressure liquid ejecting apparatus according to claim 1,
The sub-scanning mechanism includes a hydraulic motor fixed to the housing, a support mechanism that supports the liquid path with respect to the housing so as to allow conical rotation without rotation, and a hydraulic motor on one rotation cross section of the conical rotation. A high-pressure liquid ejecting apparatus, comprising: a transmission mechanism that transmits the power of the power to the support mechanism; and a counterweight having a center of gravity on the opposite side of the liquid path in one rotation cross section of the conical rotation. 3. The high-pressure liquid ejecting apparatus according to claim 1, wherein the high-pressure pipe for supplying the high-pressure liquid to the liquid path and the pair of hydraulic pipes for supplying or discharging the hydraulic oil to the hydraulic motor are protected. A high-pressure liquid ejecting apparatus, wherein the high-pressure liquid ejecting apparatus is arranged in parallel in a tube, and the protective tube supports the casing to perform the main scanning.