WO2020217716A1 - 成形システム - Google Patents
成形システム Download PDFInfo
- Publication number
- WO2020217716A1 WO2020217716A1 PCT/JP2020/008886 JP2020008886W WO2020217716A1 WO 2020217716 A1 WO2020217716 A1 WO 2020217716A1 JP 2020008886 W JP2020008886 W JP 2020008886W WO 2020217716 A1 WO2020217716 A1 WO 2020217716A1
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- WO
- WIPO (PCT)
- Prior art keywords
- metal pipe
- gas
- nozzle
- pipe material
- unit
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/045—Closing or sealing means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/041—Means for controlling fluid parameters, e.g. pressure or temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/047—Mould construction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
Definitions
- This disclosure relates to a molding system.
- Patent Document 1 describes a molding system capable of improving the sealing property when supplying a fluid to a metal pipe material.
- the molding system includes a heating unit that heats the end portion of the metal pipe material, a fluid supply unit that supplies fluid into the metal pipe material to expand it, and a control unit that controls the heating unit and the fluid supply unit.
- the control unit controls the heating unit so as to heat the end portion of the metal pipe material before the fluid is supplied by the fluid supply unit.
- the gas supplied into the metal pipe material becomes hot as the metal pipe material is heated.
- the heated gas is released after the molding of the metal pipe material in the molding system is completed, the members around the flow path through which the fluid flows may be affected by heat.
- an object of the present disclosure is to provide a molding system capable of suppressing the influence of heat on the members around the flow path.
- One form of the present disclosure is a molding system in which a heated metal pipe material is expanded to form a metal pipe.
- This molding system flows through a gas supply unit that supplies gas to a heated metal pipe material to expand the metal pipe material, a discharge unit that discharges gas after expanding the metal pipe material, and a discharge unit.
- a cooling unit for cooling the gas is provided.
- the gas is supplied to the metal pipe material heated by the gas supply unit to expand the metal pipe material.
- the gas becomes a gas that has become hot due to the heated metal pipe material.
- the hot gas is discharged at the discharge section after expanding the metal pipe material.
- the molding system includes a cooling unit that cools the gas flowing through the discharging unit. This makes it possible to prevent the hot fluid from flowing through the flow path in the molding system. From the above, the influence of heat on the members around the flow path can be suppressed.
- the gas supply unit includes a nozzle having a supply port for supplying gas, a support portion extending from the nozzle to the opposite side of the supply port to support the nozzle, and the support portion along the extending direction of the support portion. It has a driving part to move, and a flow path is formed in the nozzle and the support part so as to circulate the gas to the supply port side and to circulate the hot gas from the metal pipe material to the discharge part side.
- the gas supply unit is provided with a cooling unit that cools the hot gas flowing through the flow path, and the cooling unit is a member separate from the nozzle and is at least on the supply port side in the extension direction from the drive unit. It may be provided at a position.
- the high-pressure gas is supplied to the metal pipe material heated by the gas supply unit to expand the metal pipe material.
- the high-pressure gas becomes a gas that has become hot due to the heated metal pipe material.
- the hot gas flows through the flow path provided in the nozzle and the support portion.
- the cooling unit is arranged so as to cool the flow path at least at a position on the supply port side in the extending direction with respect to the driving unit. Therefore, the high-temperature gas flowing through the flow path is cooled by the cooling unit at least at a position on the supply port side in the stretching direction with respect to the driving unit.
- At least the range on the supply port side in the stretching direction from the drive unit is less susceptible to heat than the range on the side opposite to the supply port side in the stretching direction than the drive unit and the drive unit, so the temperature becomes high.
- the influence of heat from the gas can be suppressed within this range. Therefore, the influence of heat on the members around the flow path can be suppressed.
- the gas supply unit includes a nozzle having a supply port for supplying gas, a support portion extending from the nozzle to the opposite side of the supply port to support the nozzle, and the support portion along the extending direction of the support portion. It has a drive unit to be moved, and a flow path extending from the metal pipe material to the discharge portion side is formed in the nozzle and the support portion so as to flow the gas to the supply port side and supply the gas.
- the section is provided with a cooling section for cooling the gas flowing through the flow path, and the cooling section is provided at least at a position on the supply port side in the stretching direction with respect to the driving section, and the stretching direction of a part of the flow path.
- the hot gas may be cooled by reducing the cross-sectional area with respect to the cross-sectional area with respect to the extending direction of other sections of the flow path.
- the high-pressure gas is supplied to the metal pipe material heated by the gas supply unit to expand the metal pipe material.
- the high-pressure gas becomes a gas that has become hot due to the heated metal pipe material.
- the hot gas flows through the flow path provided in the nozzle and the support portion.
- a cooling unit provided in the flow path at least at a position on the supply port side in the extension direction with respect to the drive unit reduces a part of the flow path.
- the hot gas flowing through the flow path undergoes an adiabatic change by passing through the cooling unit. Therefore, the hot gas is cooled at least at the position on the supply port side in the stretching direction with respect to the driving unit.
- At least the range on the supply port side in the stretching direction from the drive unit is less susceptible to heat than the range on the side opposite to the supply port side in the stretching direction than the drive unit and the drive unit, so the temperature becomes high.
- the influence of heat from the gas can be suppressed within this range. Therefore, it is possible to efficiently suppress the influence of heat on the members around the flow path with a simple configuration.
- the influence of heat on the members around the flow path can be suppressed.
- FIG. 1 is a schematic view of an expansion molding apparatus included in the molding system according to the present embodiment.
- FIG. 2 is a front view of the pipe holding mechanism on the right side shown in FIG.
- FIG. 3 is a schematic view showing a main part of the molding system according to the present embodiment.
- FIG. 4 is a detailed cross-sectional view showing a cooling unit of the molding system according to the present embodiment.
- FIG. 1 is a schematic view of an expansion molding apparatus included in the molding system according to the present embodiment.
- the molding system 200 includes an expansion molding device 10 for molding a metal pipe by blow molding.
- the expansion molding apparatus 10 is installed on a horizontal plane.
- the vertical upper side is “upper” and the vertical lower side is “lower” with respect to the horizontal plane on which the expansion molding apparatus 10 is installed, and one side in one direction parallel to the horizontal plane (left side of the paper surface in FIG.
- the opposite side (right side of the paper in FIG. 1) is defined as “right”.
- the front side is “front” and the back side is “rear”, which is perpendicular to the paper surface of FIG.
- the terms “top,”"bottom,””left,” and “right” are based on the states shown and are for convenience.
- the expansion molding apparatus 10 includes a mold 13 composed of a lower mold 11 and an upper mold 12 paired with each other, an upper mold drive mechanism 80 for moving the upper mold 12, and both left and right sides of the lower mold 11 and the upper mold 12.
- a pair of pipe holding mechanisms 20 that hold the right end portion and the left end portion of the metal pipe material P
- a water circulation mechanism 14 that forcibly cools the mold 13 with water
- a control device 100 that controls each of the above configurations
- an apparatus It is provided with a base 15 that supports almost the entire configuration on the upper surface.
- the mold 13 is a blow molding mold.
- the expansion molding apparatus 10 is installed so that the upper surface of the base 15 is horizontal.
- the lower mold 11 is made of a steel block, has a recess 111 corresponding to the molding shape on the upper surface thereof, and has a cooling water passage 112 formed inside.
- the upper mold 12 is made of a steel block, has a recess 121 on the lower surface thereof according to the molding shape, and has a cooling water passage 122 formed inside.
- a water circulation mechanism 14 is connected to the cooling water passages 112 and 122, and cooling water is supplied by a pump.
- the lower mold 11 and the upper mold 12 are in close contact with each other, and the recess 111 and the recess 121 form a space having a target shape in which the metal pipe material P is to be formed.
- This target shape is a shape in which the left and right ends are inclined downward with respect to a linear shape parallel to the left-right direction, which is curved or bent in the middle.
- the metal pipe material P is bent or curved in the same manner as the target shape, but has an outer diameter smaller than the target shape over the entire length, and is formed into the target shape in the process of expansion molding. Therefore, the metal pipe material P is held by the pair of pipe holding mechanisms 20 so that both ends thereof are oriented in the same direction as the target shapes of the lower mold 11 and the upper mold 12.
- the right end portion of the metal pipe material P is held by the right pipe holding mechanism 20 so as to be directed diagonally downward to the right and inclined slightly downward with respect to the right direction.
- the left end portion of the metal pipe material P is held by the left pipe holding mechanism 20 so as to be directed diagonally downward to the left, which is inclined slightly downward with respect to the left direction.
- a lower die holder 97 On the lower side of the lower mold 11, a lower die holder 97, a lower die base plate 98, and a slide 92, which are stacked in order downward, are provided.
- the upper die drive mechanism 80 includes a first upper die holder 86, a second upper die holder 87, and an upper die base plate 88 that are stacked in order from the upper side to the upper side of the upper die 12. Further, the upper die drive mechanism 80 includes a slide 82 for moving the upper die 12 so that the upper die 12 and the lower die 11 are aligned with each other, and a pull-back cylinder 85 as an actuator for generating a force for pulling the slide 82 upward.
- Pressure oil is applied to the main cylinder 84 as a drive source for lowering and pressurizing the slide 82, the hydraulic pump 81 for supplying pressure oil to the main cylinder 84, the servo motor 83 for controlling the amount of fluid with respect to the hydraulic pump 81, and the pull-back cylinder 85. It includes a hydraulic pump (not shown) to be supplied and a motor (not shown) as a drive source thereof.
- the slide 82 is equipped with a position sensor such as a linear sensor for detecting the vertical position and the moving speed, and a load sensor such as a load cell for detecting the load of the upper die 12.
- the position sensor and load sensor of the upper drive mechanism 80 are not essential and can be omitted. Further, when the hydraulic pressure is used in the upper drive mechanism 80, a measuring device for measuring the hydraulic pressure can be used instead of the load sensor.
- the expansion molding apparatus 10 includes a radiation thermometer 102 for measuring the temperature of the metal pipe material P.
- the radiation thermometer 102 is only an example of the temperature detection unit, and a contact type temperature sensor such as a thermocouple may be provided.
- One pipe holding mechanism 20 is arranged on each of the left and right sides of the mold 13 on the base 15.
- the pipe holding mechanism 20 on the right side holds one end of the metal pipe material P whose direction is determined by the mold 13 so as to be directed diagonally downward to the right, and the pipe holding mechanism 20 on the left side is held by the mold 13.
- the other end of the metal pipe material P whose orientation is defined is held diagonally downward to the left.
- the right side pipe holding mechanism 20 and the left side pipe holding mechanism 20 are fixed on the base 15 with their respective configurations adjusted in an angle corresponding to the inclination of the end portion of the metal pipe material P for holding. Since the structure is the same except for the above points, the following description mainly describes the pipe holding mechanism 20 on the right side.
- FIG. 2 is a front view of the pipe holding mechanism on the right side shown in FIG.
- the pipe holding mechanism 20 on the right side is installed on the upper surface of the base 15 in a state in which the entire configuration is tilted according to the tilt angle of the right end portion of the metal pipe material P to be held.
- the entire configuration of the pipe holding mechanism 20 is not tilted, that is, the right end portion of the metal pipe material P parallel to the left-right direction is held. Shown.
- the pipe holding mechanism 20 includes a lower electrode 21 and an upper electrode 22, which are a pair of electrodes for gripping the right end portion of the metal pipe material P, and a nozzle 23 for supplying compressed gas from the right end portion of the metal pipe material P to the inside.
- An electrode mounting unit 30 that supports the lower electrode 21 and the upper electrode 22, a nozzle mounting unit 40 that supports the nozzle 23, an elevating mechanism 50 that raises and lowers the lower electrode 21, the upper electrode 22, and the nozzle 23, and all of them. It is provided with a unit base 24 that supports the configuration of.
- the nozzle 23, the nozzle mounting unit 40, the hydraulic circuit 43 described later, and the pneumatic circuit 44 described later are examples of a gas supply unit and a discharge unit.
- the unit base 24 is a rectangular plate-shaped block in a plan view that supports the electrode mounting unit 30 and the nozzle mounting unit 40 on the upper surface via the elevating mechanism 50.
- the unit base 24 is attached to the upper surface of the base 15 which is a horizontal surface by a fixing means such as a bolt, and can be removed.
- the pipe holding mechanism 20 has a plurality of unit bases 24 having different inclination angles of the upper surfaces, and by exchanging these, the lower electrode 21, the upper electrode 22, the nozzle 23, the electrode mounting unit 30, the nozzle mounting unit 40, It is possible to collectively change and adjust the tilt angle of the elevating mechanism 50.
- the electrode mounting unit 30 makes the lower electrode 21 and the upper electrode 22 along the extending direction of each end of the metal pipe material P whose direction is defined by the mold 13. Adjust so that it can be moved.
- the "extending direction of the end portion" is a direction in which the center line at one end of the metal pipe material P is linearly extended, or a direction in which one end of the metal pipe material P faces. Refers to the vector direction along.
- the nozzle mounting unit 40 can move the nozzle 23 along the extending direction of each end of the metal pipe material P whose direction is defined by the mold 13. Adjust to. That is, the unit base 24 functions as an electrode adjusting unit and a nozzle adjusting unit.
- the upper surface of the unit base 24 is It is an inclined plane inclined in a direction in which the right side is lowered about an axis along the horizontal direction, and the inclination angle coincides with the inclination angle in the extending direction of the right end portion of the metal pipe material P.
- the elevating mechanism 50 is supported by a pair of front and rear elevating frame bases 51 and 52 attached to the upper surface of the unit base 24 and these elevating frame bases 51 and 52 so as to be able to elevate and lower along the direction perpendicular to the upper surface of the unit base 24. It is provided with an elevating actuator 53 that imparts an elevating operation to the elevating frame 31 of the electrode mounting unit 30.
- the elevating frame bases 51 and 52 are detachably attached to the upper surface of the unit base 24 by fastening means such as bolts.
- the elevating frame base 51 on the front side and the elevating frame base 52 on the rear side have a three-dimensional shape that is plane-symmetrical with each other having planes parallel to the vertical and horizontal directions as symmetrical planes.
- These elevating frame bases 51 and 52 have a frame shape, and the elevating frame 31 is supported between them so as to be able to move up and down along the direction perpendicular to the upper surface of the unit base 24.
- the elevating frame bases 51 and 52 are each provided with plate-shaped liners 54 and 55 on the left side and the right side, and plate-shaped liners on the front side and the rear side.
- liners 54 and 55 stably guide the elevating operation of the unit base 24 along the upper surface vertical direction with respect to the front side portion and the rear side portion of the elevating frame 31.
- the liners provided on the front side and the rear side stably guide the movement in the left-right direction.
- the elevating actuator 53 is a linear acting actuator that imparts a reciprocating motion along the upper surface vertical direction of the unit base 24 to the elevating frame 31, and for example, a hydraulic cylinder or the like can be used.
- the lower electrode 21 and the upper electrode 22 are both rectangular flat plate-shaped electrodes in which a plate-shaped conductor is sandwiched between insulating plates.
- a semicircular notch is formed in each of the central upper end portion of the lower electrode 21 and the central lower end portion of the upper electrode 22 so as to vertically penetrate the flat plate surface. Then, when the lower electrode 21 and the upper electrode 22 are arranged on the same plane and the upper end portion of the lower electrode 21 and the lower end portion of the upper electrode 22 are brought into close contact with each other, the semicircular cuts are combined. It becomes a circular through hole. This circular through hole substantially coincides with the outer diameter of the end portion of the metal pipe material P, and when the metal pipe material P is energized, the end portion is fitted into the circular through hole. It is gripped by the lower electrode 21 and the upper electrode 22.
- the lower electrode 21 is electrically connected to the power supply 101 controlled by the control device 100.
- the upper electrode 22 energizes the metal pipe material P via the lower electrode 21.
- the power supply 101 is controlled by the control device 100, energizes the lower electrodes 21 of the left and right pipe holding mechanisms 20, and can rapidly heat the metal pipe material P by Joule heating.
- each of the notches of the lower electrode 21 and the upper electrode 22 has a shape obtained by dividing the outer shape of the end portion of the metal pipe material P by half.
- the electrode mounting unit 30 supports the lower electrode 21 and the upper electrode 22 by maintaining the direction in which the flat plate surfaces of the lower electrode 21 and the upper electrode 22 are perpendicular to the extending direction of the right end portion of the metal pipe material P described above. For example, when the upper surface of the unit base 24 is horizontal, the electrode mounting unit 30 supports the lower electrode 21 and the upper electrode 22 in a direction in which the flat plate surfaces are parallel to each other in the vertical and front-rear directions.
- the electrode mounting unit 30 holds an elevating frame 31 in which an elevating operation is applied along a direction perpendicular to the upper surface of the unit base 24 by the elevating mechanism 50 described above, and a lower electrode 21 at the left end of the elevating frame 31.
- the lower electrode frame 32 is provided, and the upper electrode frame 33 provided above the lower electrode frame 32 and holding the upper electrode 22 is provided.
- the lower electrode frame 32 is a frame body that holds the outer circumference excluding the upper end portion of the lower electrode 21.
- the lower electrode frame 32 can be moved along a direction parallel to the left-right direction and parallel to the upper surface of the unit base 24 in a plan view via two linear guides provided in the front-rear direction. It is supported by the left end of.
- the lower electrode frame 32 is provided with an actuator for moving the lower electrode, which imparts a moving motion along the moving direction by each linear guide.
- a hydraulic cylinder or the like can be used for this lower electrode moving actuator.
- the lower electrode frame 32 is provided with a position sensor such as a linear sensor that detects a position in the moving direction by each linear guide. With these configurations, the lower electrode 21 can reciprocate along the extending direction of the right end portion of the metal pipe material P.
- slide blocks that can be moved along a direction parallel to the left-right direction in a plan view and parallel to the upper surface of the unit base 24 are individually provided via a linear guide. It is provided in. Further, the slide block is provided with an upper electrode moving actuator as a one-side electrode moving actuator that imparts a moving motion along the moving direction by each linear guide. For this upper electrode moving actuator, for example, a hydraulic cylinder or the like can be used.
- the slide block is provided with a position sensor such as a linear sensor that detects a position in a moving direction by each linear guide.
- the upper electrode frame 33 is a frame body that holds the outer circumference excluding the lower end portion of the upper electrode 22.
- the upper electrode frame 33 is movable along the direction perpendicular to the upper surface of the unit base 24 via two linear guides provided in the front-rear direction on the upper portion of each slide block. Is supported by. Further, an upper electrode levitation spring is inserted between the upper electrode frame 33 and each slide block, and the upper electrode frame 33 is always pressed upward with respect to each slide block.
- the upper electrode frame 33 can be moved in a direction (vertical direction) perpendicular to the upper surface of the unit base 24 with respect to each slide block.
- Each slide block can move in a direction parallel to the lower electrode frame 32 in the left-right direction and parallel to the upper surface of the unit base 24 (left-right direction) in a plan view. Therefore, the upper electrode frame 33 can move up and down with respect to the lower electrode frame 32 and can move along the end extending direction (left-right direction) of the metal pipe material P.
- the lower electrode frame 32 is provided with one clamp actuator for raising and lowering the upper electrode frame 33 in a direction perpendicular to the upper surface of the unit base 24.
- each clamp actuator for example, a hydraulic cylinder or the like can be used.
- the tip of the plunger of each clamp actuator is movably connected to the upper electrode frame 33 along the end extending direction (left-right direction) of the metal pipe material P. Therefore, the movement operation of the metal pipe material P of the upper electrode frame 33 with respect to the lower electrode frame 32 along the end extending direction (left-right direction) is not hindered.
- the nozzle 23 is a cylinder into which the end of the metal pipe material P can be inserted.
- the center line of the nozzle 23 is supported by the nozzle mounting unit 40 so as to be parallel to the extending direction of the end portion of the metal pipe material P.
- the inner diameter of the end portion (hereinafter, referred to as “supply port”) of the nozzle 23 on the metal pipe material P side substantially coincides with the outer diameter of the metal pipe material P after expansion molding.
- the nozzle 23 is provided with a pressing force sensor that detects the pressing force of the contact of the metal pipe material P.
- the nozzle mounting unit 40 is mounted on the right end of the elevating frame 31 of the electrode mounting unit 30. Therefore, when the lifting operation is performed by the lifting mechanism 50, the nozzle mounting unit 40 moves up and down integrally with the electrode mounting unit 30.
- the nozzle mounting unit 40 when the lower electrode 21 and the upper electrode 22 of the electrode mounting unit 30 grip the end of the metal pipe material P, the end of the metal pipe material P and the nozzle 23 are concentric.
- the nozzle 23 is supported at the position. For example, when the upper surface of the unit base 24 is horizontal, the nozzle mounting unit 40 supports the nozzle 23 in a direction in which the center line is parallel to the left-right direction.
- the nozzle mounting unit 40 has a hydraulic cylinder mechanism as a nozzle moving actuator that moves the nozzle 23 along the extending direction of the end portion of the metal pipe material P.
- This hydraulic cylinder mechanism includes a piston 41 (an example of a support portion) that holds the nozzle 23, and a cylinder 42 (an example of a drive portion) that imparts forward / backward movement to the piston 41.
- the cylinder 42 is fixedly mounted on the right end portion of the elevating frame 31 in a direction in which the piston 41 is moved forward and backward in parallel with the extending direction of the end portion of the metal pipe material P.
- the cylinder 42 is connected to a hydraulic circuit 43 (see FIG. 1), and pressure oil, which is a working fluid, is supplied and discharged inside. In the hydraulic circuit 43, the supply and discharge of pressure oil to the cylinder 42 is controlled by the control device 100.
- the hydraulic circuit 43 is also connected to the pipe holding mechanism 20 on the left side, but the path showing the connection is not shown in FIG.
- the piston 41 includes a main body portion 411 housed in the cylinder 42, a head portion 412 protruding outward from the left end portion (lower electrode 21 and upper electrode 22 side) of the cylinder 42, and the right end portion of the cylinder 42 to the outside. It is provided with a protruding tubular portion 413.
- the main body portion 411, the head portion 412, and the tubular portion 413 are all cylindrical and are concentrically and integrally formed.
- the outer diameter of the main body 411 substantially matches the inner diameter of the cylinder 42. Then, in the cylinder 42, hydraulic pressure is supplied to both sides of the main body 411 to move the piston 41 forward and backward.
- the head 412 has a smaller diameter than the main body 411, and nozzles 23 are concentrically fixedly mounted on the tip of the left side (lower electrode 21 and upper electrode 22 side) of the head 412.
- the tubular portion 413 is a circular tube having a smaller diameter than the main body portion 411 and the head portion 412. The tubular portion 413 penetrates the right end portion of the cylinder 42 and projects to the outside of the cylinder 42.
- the piston 41 is formed with a compressed gas flow path 414 penetrating the center over the entire length from the head 412 to the tip of the tubular portion 413 through the main body 411.
- the tip (right end) of the tubular portion 413 is connected to a pneumatic circuit 44 (see FIG. 1) that supplies and discharges compressed gas to the nozzle 23.
- the pneumatic circuit 44 is also connected to the pipe holding mechanism 20 on the left side, but the path showing the connection is not shown in FIG.
- the nozzle 23 provided at the tip of the head 412 communicates with the flow path 414 of the compressed gas. That is, the nozzle mounting unit 40 has a structure capable of supplying the compressed gas to the nozzle 23 through the piston 41 from the side opposite to the nozzle 23.
- the compressed gas is, for example, compressed air.
- the expansion molding operation of the expansion molding device 10 having the above configuration is performed based on the operation control of the control device 100.
- the control device 100 includes a processing program related to operation control, a storage unit that stores various types of information, and a processing device that executes operation control based on the processing program.
- the unit base 24 whose upper surface is inclined in the direction corresponding to the extending direction of the end portion of the metal pipe material P according to the target shape determined by the mold 13 is selected and attached to each pipe holding mechanism 20. Then, each pipe holding mechanism 20 is fixed to the upper surface of the base 15.
- the control device 100 controls the lower electrode moving actuators of the left and right pipe holding mechanisms 20 to advance and move the lower electrode 21 to a position where it abuts on the lower mold 11. Further, the control device 100 controls the actuators for moving the upper electrodes of the left and right pipe holding mechanisms 20 to move the upper electrodes 22 back and forth with respect to the lower electrodes 21 at positions separated from the ends of the metal pipe material P. Let me. The metal pipe material P is placed on the left and right lower electrodes 21 arranged in this way so as to fit into the semicircular notch. Further, since the upper electrode 22 is retracted, it does not interfere with the mounting work of the metal pipe material P. The metal pipe material P placed on the lower electrode 21 is located slightly above the lower mold 11 and is not in contact with the lower mold 11.
- control device 100 controls the actuator for moving the upper electrode to move the upper electrode 22 to the gripping position above the lower electrode 21.
- the gripping position of the upper electrode 22 is a position where the end portion of the metal pipe material P can be gripped by lowering the upper electrode 22 toward the lower electrode 21.
- control device 100 controls the clamping actuator to lower the upper electrode 22 toward the lower electrode 21.
- the end portion of the metal pipe material P fits into the semicircular notch of the upper electrode 22, and is gripped by the lower electrode 21 and the upper electrode 22.
- the control device 100 controls the power supply 101 to the lower electrodes 21. Energize. As a result, the metal pipe material P is Joule-heated. At this time, the control device 100 monitors the temperature of the metal pipe material P with the radiation thermometer 102 and heats it for a specified time within a specified target temperature range.
- the control device 100 stores the correlation between the temperature of the metal pipe material P and the amount of heat elongation as data, and with reference to this correlation data, the metal is based on the temperature detected by the radiation thermometer 102. Obtain the heat elongation amount of the pipe material P. Further, the control device 100 controls the lower electrode moving actuator from the acquired heat elongation amount, and positions the lower electrode 21 and the upper electrode 22 of each pipe holding mechanism 20 so as not to apply stress to the metal pipe material P. Move to a position where the stress is sufficiently reduced. By performing this electrode position control, the control device 100 functions as an electrode position control unit. This electrode position control is periodically and repeatedly executed while the lower electrodes 21 of the left and right pipe holding mechanisms 20 are energized.
- the lower electrode 21 and the upper electrode 22 extend in the extending direction with respect to the end of the metal pipe material P without using the correlation data between the temperature of the metal pipe material P and the heat elongation amount.
- the movement may be controlled while applying a weak tension that does not give deformation to the metal pipe material P in the direction of extension toward.
- the lower electrode moving actuator is, for example, a hydraulic cylinder
- the lower electrode 21 and the upper electrode 22 may be moved in the direction of extending in the extending direction by setting the hydraulic pressure to the above-mentioned low pressure. ..
- the control device 100 controls the clamp actuator to raise the upper electrode 22, and further controls the lower electrode moving actuator to move the lower electrode 21 and the upper electrode 22 to the mold 13 side.
- the lower electrode 21 is brought into contact with the lower mold 11.
- the upper electrode 22 is lowered and gripped again.
- the control device 100 functions as a re-grasping motion control unit that controls the re-grasping motion.
- the control device 100 controls the elevating actuator 53 to lower the metal pipe material P to a position where it comes into contact with or is close to the recess 111 of the lower mold 11.
- the configuration on the elevating frame 31 All cause position fluctuations in the left-right direction. For example, the pipe holding mechanism 20 on the right side moves to the right, and the pipe holding mechanism 20 on the left side moves to the left.
- the control device 100 controls the clamp actuator to raise the upper electrode 22, and further controls the lower electrode moving actuator to move the lower electrode 21 and the upper electrode 22 to the mold 13 side. Move it so that it comes into contact with it. Then, the upper electrode 22 is lowered to grip the end portion of the metal pipe material P again. That is, the control device 100 once again controls the re-grasping operation.
- the control device 100 performs the re-grasping operation control twice is illustrated, but the first re-grasping operation control at the end of energization of the metal pipe material P is not executed, and the lifting actuator is used.
- the lower electrode 21 and the upper electrode 22 may be lowered by the control of 53, and then the re-grasping operation control may be performed only once.
- the control device 100 controls the servomotor 83 of the upper die drive mechanism 80 to lower the upper die 12 to a position in contact with the lower die 11. Further, the control device 100 controls the hydraulic circuit 43 to control the nozzle mounting units 40 of the left and right pipe holding mechanisms 20, and advances and moves each nozzle 23 toward the end side of the metal pipe material P. As a result, the end portion of the metal pipe material P is inserted into the supply port of the nozzle 23. Then, the control device 100 controls the pneumatic circuit 44 to supply the compressed gas from the nozzle 23 into the metal pipe material P. As a result, the metal pipe material P whose hardness has been lowered by Joule heating is formed into a target shape in the mold 13 by internal pressure.
- the control device 100 stores the correlation between the temperature of the metal pipe material P and the amount of heat elongation as data. Therefore, referring to this correlation data, the metal pipe material P by the radiation thermometer 102 The amount of shrinkage of the metal pipe material P is obtained based on the detected temperature. Further, the control device 100 controls the hydraulic circuit 43 to operate the nozzle mounting unit 40 from the acquired contraction amount, and moves the nozzle 23 to the mold 13 side. More specifically, according to the amount of shrinkage of the metal pipe material P, the end portion of the metal pipe material P is moved following the nozzle 23 so as not to come off the nozzle 23. By performing this nozzle position control, the control device 100 functions as a nozzle position control unit. The nozzle position control is periodically and repeatedly executed while the compressed gas is being supplied from the nozzle 23 into the metal pipe material P.
- the nozzle 23 affects the end portion of the metal pipe material P by buckling, deformation, etc., without using the correlation data between the temperature of the metal pipe material P and the heat elongation amount.
- An upper limit value may be set in advance within a range that does not exist, and control of movement may be performed while applying a pressing force so as not to exceed the upper limit value.
- the control device 100 stops the supply of the compressed gas and releases the gripping state by the lower electrode 21 and the upper electrode 22. , Raise the upper mold 12. After that, the control device 100 cools the metal pipe material P through the mold 13 by the water circulation mechanism 14. Next, the control device 100 discharges a compressed gas (an example of a gas having a high temperature) from the inside of the metal pipe material P. After discharging the compressed gas, the control device 100 controls the actuator for moving the upper electrode of each pipe holding mechanism 20 and retracts and moves the upper electrode 22 in the direction away from the mold 13. As a result, the molded metal pipe material P can be easily taken out from the expansion molding apparatus 10.
- a compressed gas an example of a gas having a high temperature
- FIG. 3 is a schematic view showing a main part of the molding system according to the present embodiment.
- the molding system 200 shown in FIG. 3 is an expansion molding apparatus 10 having a nozzle 23 for discharging a hot gas from the metal pipe material P, a nozzle mounting unit 40, and a pneumatic circuit 44 (an example of a gas supply unit and a discharge unit). And a cooling unit 170.
- the high-temperature gas is, for example, a gas that has been heated in the heated metal pipe material P and discharged from the metal pipe material P.
- the hot gas discharged from the metal pipe material P circulates in the order of the nozzle 23, the flow path 414 of the nozzle mounting unit 40, and the pneumatic circuit 44, and reaches the discharge port (not shown) in the pneumatic circuit 44. ..
- the pneumatic circuit 44 has, for example, a communication tube whose tip is connected to the flow path 414 to communicate with the flow path 414, an on-off valve provided in the communication tube, and an discharge port located at the end of the communication tube.
- the communication tube communicates with the flow path 414 and guides the compressed gas from the metal pipe material P to the discharge port.
- the on-off valve is a valve that opens or closes the communication tube.
- the control device 100 closes the communication tube by the on-off valve.
- the control device 100 opens the communication tube by the on-off valve.
- the discharge port discharges the hot gas discharged from the metal pipe material P guided through the communication tube to the outside of the molding system 200.
- the exhaust port is, for example, an exhaust muffler.
- the cooling unit 170 cools the hot gas flowing through the flow path 414.
- the cooling unit 170 is, for example, a member different from the members included in the nozzle 23 and the nozzle mounting unit 40.
- a comparative example with respect to the molding system 200 of the present embodiment an example in which the nozzle 23 and the nozzle mounting unit 40 are excluded from the cooling unit 170 and are composed of only a straight flow path 414 will be given. Even in such a comparative example, the gas that has become hot is slightly cooled by heat transfer and heat dissipation in the members around the flow path 414.
- the cooling unit 170 does not include a structure having only a straight flow path 414 as in the comparative example.
- the cooling unit 170 is a portion having a high cooling capacity for a high-temperature gas as compared with a structure in which cooling is performed only by heat transfer and heat dissipation as in a comparative example.
- the cooling capacity refers to the ability to increase the difference between the temperature of the hot gas discharged from the metal pipe material P and the temperature of the gas discharged at the discharge port when measured under the same conditions. ..
- the control device 100 discharges the hot gas from the metal pipe material P
- the cooling unit 170 has a function of cooling the discharged hot gas.
- the cooling unit 170 is provided as a separate member from the nozzle 23 and the nozzle mounting unit 40 at least at a position on the supply port side of the nozzle 23 in the extending direction of the flow path 414 with respect to the cylinder 42. That is, when the surface of the cylinder 42 on the nozzle 23 side is the boundary 47a, the cooling unit 170 is provided at least at a position on the supply port side of the nozzle 23 in the extending direction of the flow path 414 with respect to the boundary 47a.
- the cooling unit 170 is provided on the supply port side of the nozzle 23 at least from the main body portion 411, which is a portion of the piston 41 that contacts the cylinder 42. In this state, the position of the nozzle 23 on the supply port side in the stretching direction from the boundary 47a corresponds to the "position on the supply port side in the stretching direction from the driving unit" in the claim.
- the nozzle mounting unit 40 has a protected portion 47 that needs to be protected from heat.
- the protected portion 47 has low heat resistance and is affected by the function of supplying a high-pressure gas or exhausting a high-temperature gas when affected by heat.
- the cylinder 42 since the cylinder 42 has hydraulic oil in the internal space, it has, for example, packing at a portion in contact with the piston 41 in order to suppress leakage.
- the protected portion 47 includes a member on the cylinder 42 side in the extending direction of the flow path 414 from the boundary 47a.
- the cooling unit 170 may be provided at least on the supply port side of the nozzle 23 from the boundary 47b. That is, the region of the piston 41 between the boundary 47a and the boundary 47b is not a portion directly adjacent to the cylinder 42 during exhaust. However, assuming that the hot gas has passed through the region, the temperature is high due to heat transfer, and the region is adjacent to the cylinder 42 at the time of drawing. Therefore, in order to further improve safety, when the region to be heated is kept away from the cylinder 42, the region to be heated may be regarded as a part of the protected portion 47.
- the protected portion 47 may be considered to include a member on the cylinder 42 side in the extending direction of the flow path 414 with respect to the boundary 47b.
- the cooling unit 170 can further suppress the temperature of the member due to the heat of the high-temperature gas or the heat transfer by the high-temperature gas.
- the cooling portion 170 may be provided on the nozzle 23 side of the diameter-expanded portion of the piston 41.
- the cooling portion 170 may be provided at least on the supply port side of the nozzle 23 from the boundary 47c.
- the region of the piston 41 between the boundary 47b and the boundary 47c is a portion that is not adjacent to the cylinder 42 even in the retracted state.
- the region has a small diameter and a small amount of material, it is easier to transfer heat to the cylinder 42 side when the temperature becomes higher than that of the enlarged diameter portion as described above. Therefore, in order to further improve safety, a region where heat is easily transferred to the cylinder 42 when the temperature rises may be regarded as a part of the protected portion 47.
- the protected portion 47 may be considered to include a member on the cylinder 42 side in the extending direction of the flow path 414 with respect to the boundary 47c.
- the cooling unit 170 can further suppress the influence of the heat of the hot gas or the heat of the member heated by the heat transfer by the hot gas.
- the cooling unit 170 may be provided on the supply port side of the nozzle 23 further than the boundary 47c.
- the cooling unit 170 is provided, for example, near the supply port of the nozzle 23. The farther the cooling unit 170 is from the region corresponding to the protected unit 47, the smaller the influence of heat transfer, so that the safety can be improved.
- FIG. 4 is a detailed cross-sectional view showing a cooling unit of the molding system according to the present embodiment.
- the cooling unit 170 reduces the cross-sectional area of a part of the flow path 414 with respect to the stretching direction as compared with the cross-sectional area of the other section of the flow path 414 with respect to the stretching direction.
- the nozzle 23 or the nozzle mounting unit 40 has a structure in which a part of the flow path 414 is reduced as a cooling unit 170, so that the high temperature gas is cooled. That is, when the hot gas reaches the section where the cross-sectional area of the cooling unit 170 is reduced to the section where the cross-sectional area is expanded again, adiabatic expansion occurs, and the hot gas is cooled.
- the cooling unit 170 may be a separate member from the members included in the nozzle 23 and the nozzle mounting unit 40, or may be formed continuously with the members included in the nozzle 23 and the nozzle mounting unit 40 without boundaries. It may be a member.
- the cooling unit 170 is, for example, an orifice.
- the cooling unit 170 has, for example, an orifice unit 171, an upstream flow path 172, and a downstream flow path 173.
- the cooling unit 170 provides an orifice unit 171 between the upstream flow path 172 and the downstream flow path 173.
- the orifice portion 171 is a portion of the flow path 414 in which the cross-sectional area in the stretching direction is reduced as compared with other sections.
- the upstream flow path 172 is provided on the nozzle 23 side of the orifice portion 171 and has a larger cross-sectional area than the orifice portion 171.
- the downstream flow path 173 is provided on the protected portion 47 side of the orifice portion 171 and has a larger cross-sectional area than the orifice portion 171.
- the cross-sectional area of the upstream flow path 172 and the downstream flow path 173 is, for example, the same.
- the cooling unit 170 is provided on the nozzle 23, for example.
- a female screw whose inner surface is threaded is provided in a part of the flow path 414 in the nozzle 23 from the boundary between the piston 41 and the nozzle 23.
- An orifice forming member 174 formed as an integral body in which the orifice portion 171 and the downstream flow path 173 are continuously formed without a boundary is engaged with the partial section.
- the orifice forming member 174 has, for example, the shape of a hollow male screw.
- the cooling unit 170 is provided in the flow path 414.
- thread cutting may be provided in the flow path 414 from the supply port of the nozzle 23 so that the orifice forming member 174 can be engaged.
- the cooling unit 170 may be provided on the piston 41. In this case, for example, the piston 41 is provided with a thread on the supply port side of the nozzle 23 to which the orifice forming member 174 can be engaged.
- the cooling unit 170 cools the hot gas when the control device 100 discharges the hot gas from the inside of the metal pipe material P.
- the pressure of the hot gas inside the metal pipe material P is defined as the upstream pressure P 0 (Pa)
- the temperature is defined as the upstream temperature T 0 (K). Therefore, the pressure of the gas that has reached a high temperature inside the metal pipe material P or in the upstream flow path 172 is the upstream pressure P 0
- the temperature is the upstream temperature T 0 (K).
- the pressure of the gas at the boundary portion of the orifice portion 171 with the downstream flow path 173 be the orifice pressure P 1 (Pa) and the temperature be the orifice temperature T 1 (K).
- ⁇ is a specific heat ratio, and when the gas at a high temperature is, for example, air, ⁇ is about 1.4. At this time, P c / P 0 is about 0.528, and T c / T 0 is about 0.833. That is, the absolute temperature drops by about 17% as the hot gas passes through the orifice portion 171.
- the cross-sectional area A of the downstream flow path 173 is adjusted so as to have a flow rate required for gas exhaust while adjusting the passing mass flow rate Mvc .
- the cross-sectional area of the orifice portion 171 is preferably about 63% or less of the cross-sectional area A of the downstream flow path 173. This is the area ratio calculated from the flow velocity ratio when P c / P 0 is about 0.528.
- the area ratio of the cross-sectional area of the orifice portion 171 to the cross-sectional area A of the downstream flow path 173 is adjusted to be small according to the exhaust capacity downstream of the orifice portion 171 to limit the passing mass flow rate Mvc of the hot gas. You may. Even when the orifice pressure P 1 increases the critical pressure P c , the same effect as described above can be obtained. Further, although air is dealt with in the above, the same effect can be obtained with other gases.
- the high-pressure gas is supplied to the metal pipe material P heated by the nozzle 23, the nozzle mounting unit 40, and the pneumatic circuit 44 to expand the metal pipe material P.
- the high-pressure gas becomes a gas that has become hot due to the heated metal pipe material P.
- the hot gas is discharged at the discharge part after expanding the metal pipe material.
- the molding system 200 includes a cooling unit 170 that cools the gas flowing through the discharge unit. As a result, it is possible to prevent the high temperature gas from flowing through the flow path 414 in the molding system 200. From the above, the influence of heat on the members around the flow path 414 can be suppressed.
- the high-pressure gas is supplied to the metal pipe material P heated by the nozzle 23, the nozzle mounting unit 40, and the pneumatic circuit 44 to expand the metal pipe material P.
- the gas becomes a gas that has become hot due to the heated metal pipe material P.
- the high-temperature gas flows through the flow path 414 provided in the nozzle 23 (an example of a nozzle) and the piston 41 (an example of a support portion).
- the cooling unit 170 is arranged so as to cool the flow path 414 at least at a position on the supply port side in the stretching direction with respect to the cylinder 42 (an example of the driving unit).
- the hot gas flowing through the flow path 414 is cooled by the cooling unit 170 at least at a position on the supply port side of the nozzle 23 in the stretching direction with respect to the cylinder 42.
- At least the range on the supply port side of the nozzle 23 in the stretching direction from the cylinder 42 is less susceptible to heat than the range on the side opposite to the supply port side of the nozzle 23 in the stretching direction than the cylinder 42 and the cylinder 42. Therefore, the influence of heat due to the high temperature gas can be suppressed within this range. Therefore, the influence of heat on the members around the flow path 414 can be suppressed.
- the cooling unit 170 reduces a part of the flow path 414.
- the high-temperature gas flowing through the flow path 414 undergoes a heat insulating change by passing through the cooling unit 170. Therefore, the hot gas is cooled at least at a position on the supply port side of the nozzle 23 in the stretching direction with respect to the cylinder 42. Therefore, it is possible to efficiently suppress the influence of heat on the members around the flow path with a simple configuration.
- the orifice forming member 174 as the cooling unit 170 into the existing flow path 414, a part of the flow path 414 can be easily reduced, and the gas that has become hot easily can be removed. Can be cooled.
- the present disclosure is not limited to the embodiments described above.
- the overall configuration of the molding system 200 and the expansion molding apparatus 10 is not limited to that shown in FIG. 1, and can be appropriately changed without departing from the spirit of disclosure.
- the overall configuration of the pipe holding mechanism 20 may be provided so as to hold both ends of the metal pipe material P parallel to the left-right direction in a state where no inclination is generated.
- the compressed gas may be an inert gas.
- the cooling unit 170 may be formed as an integral body formed continuously without a boundary with at least one of the nozzle 23 or the piston 41 instead of a separate member. That is, in at least one of the nozzle 23 and the piston 41, the flow path 414 and the orifice portion 171 may be continuously formed without a boundary.
- the orifice portion 171 may be fixed inside at least one flow path 414 of the nozzle 23 or the piston 41. In this case, the fixing method does not matter as long as the orifice portion 171 is not desorbed by the pressure of the high-pressure gas and the heat of the high-temperature gas.
- the cooling unit 170 may be provided at the tip of the nozzle 23 or the tip of the piston 41. In this case, the upstream flow path 172 of the cooling unit 170 may not be provided. The cooling unit 170 may be provided at the end of the nozzle 23. In this case, the downstream flow path 173 of the cooling unit 170 may not be provided.
- the cooling unit 170 may have a shape such as a slit shape or a grid shape that realizes adiabatic expansion.
- the cooling unit 170 does not have to be an orifice.
- the cooling unit 170 may be a water cooling mechanism provided around the flow path 414 and including a tube for circulating cold water.
- a plurality of cooling units 170 may be provided at positions on the nozzle 23 side in the extending direction of the flow path 414 with respect to the protected unit 47.
- the flow path 414 in the piston 41 may not be provided, and the compressed gas may be directly supplied to the nozzle 23.
- the cooling unit 170 may be provided in the nozzle 23 or the communication tube in order to suppress deterioration of the communication tube and the discharge port of the pneumatic circuit 44.
- Liner, 80 ... Upper type drive Mechanism, 81 ... Hydraulic pump, 82, 92 ... Slide, 83 ... Servo motor, 84 ... Main cylinder, 85 ... Pullback cylinder, 86, 87 ... Upper die holder, 88 ... Upper die base plate, 97 ... Lower die holder, 98 ... Lower die Base plate, 100 ... control device, 101 ... power supply, 102 ... radiation thermometer, 111, 121 ... recess, 112, 122 ... cooling water passage, 170 ... cooling part, 171 ... orifice part, 172 ... upstream flow path, 173 ... downstream Flow path, 174 ... Actuator forming member, 200 ... Molding system, 411 ... Main body, 412 ... Head, 413 ... Tubular part, 414 ... Flow path, A ... Cross area, P ... Metal pipe material.
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Abstract
Description
図1は、本実施形態に係る成形システムに含まれる膨張成形装置の概略図である。図1に示すように、成形システム200は、ブロー成形によって金属パイプを成形する膨張成形装置10を含む。この膨張成形装置10は、水平面上に設置される。そして、膨張成形装置10が設置される水平面に対して鉛直上方を「上」、鉛直下方を「下」とし、当該水平面に平行な一方向の片側(図1の紙面左側)を「左」、逆側(図1の紙面右側)を「右」とする。また、図1の紙面に垂直であって手前側を「前」、奥側を「後」とする。「上」「下」「左」「右」の語は、図示する状態に基づくものであり、便宜的なものである。
上記構成からなる膨張成形装置10の膨張成形の動作は、制御装置100の動作制御に基づいて行われる。そして、制御装置100は、動作制御に関する処理プログラムと各種の情報を記憶する記憶部と、処理プログラムに基づいて動作制御を実行する処理装置とを備えている。
次に、図3を参照して、本実施形態に係る成形システム200について説明する。図3は、本実施形態に係る成形システムの主要部を示す概略図である。図3に示す成形システム200は、金属パイプ材料Pから高温になった気体を排出するノズル23、ノズル搭載ユニット40及び空圧回路44(気体供給部及び排出部の一例)を有する膨張成形装置10と、冷却部170と、を備える。高温になった気体とは、例えば加熱された金属パイプ材料P内で高温化し、金属パイプ材料Pから排出された気体である。金属パイプ材料Pから排出された高温になった気体は、ノズル23、ノズル搭載ユニット40の流路414、空圧回路44の順に流通し、空圧回路44内の排出口(不図示)に至る。
ここで、制御装置100が金属パイプ材料Pの内部から高温になった気体を排出させる場合において、冷却部170が高温になった気体を冷却する方法を示す。金属パイプ材料Pの内部の高温になった気体の圧力を上流圧力P0(Pa)、温度を上流温度T0(K)とする。このため、金属パイプ材料Pの内部又は上流流路172における高温になった気体の圧力は上流圧力P0、温度は上流温度T0(K)となる。オリフィス部171における下流流路173との境界部分における気体の圧力をオリフィス圧力P1(Pa)、温度をオリフィス温度T1(K)とする。
次に、本実施形態に係る成形システム200の作用及び効果について説明する。
本開示は、上述の実施形態に限定されるものではない。例えば、成形システム200及び膨張成形装置10の全体構成は図1に示すものに限定されず、開示の趣旨を逸脱しない範囲で適宜変更可能である。例えば、パイプ保持機構20の全体構成は、傾斜を生じていない状態、つまり、左右方向に平行な金属パイプ材料Pの両端部を保持するように設けられてもよい。圧縮気体は、不活性ガスであってもよい。
Claims (3)
- 加熱された金属パイプ材料を膨張させて金属パイプを成形する成形システムであって、
加熱された前記金属パイプ材料に気体を供給して、前記金属パイプ材料を膨張させる気体供給部と、
前記金属パイプ材料を膨張させた後で前記気体を排出する排出部と、
前記排出部を流れる気体を冷却する冷却部と、を備える、成形システム。 - 前記気体供給部は、
前記気体を供給する供給口を有するノズルと、
前記ノズルから前記供給口に対して反対側へ延びて、前記ノズルを支持する支持部と、
前記支持部の延伸方向に沿って、当該支持部を移動させる駆動部と、を有し、
前記ノズル及び前記支持部には、前記気体を供給口側へ流通させると共に、前記金属パイプ材料から高温になった前記気体を前記排出部側へ流通させるように延びる流路が形成され、
前記気体供給部には、前記流路を流通する高温になった前記気体を冷却する前記冷却部が設けられ、
前記冷却部は、前記ノズルとは別部材として、少なくとも前記駆動部よりも前記延伸方向における前記供給口側の位置に設けられる、請求項1に記載の成形システム。 - 前記気体供給部は、
前記気体を供給する供給口を有するノズルと、
前記ノズルから前記供給口に対して反対側へ延びて、前記ノズルを支持する支持部と、
前記支持部の延伸方向に沿って、当該支持部を移動させる駆動部と、を有し、
前記ノズル及び前記支持部には、高圧の前記気体を供給口側へ流通させると共に、前記金属パイプ材料から前記気体を前記排出部側へ流通させるように延びる流路が形成され、
前記気体供給部には、前記流路を流通する前記気体を冷却する前記冷却部が設けられ、
前記冷却部は、少なくとも前記駆動部よりも前記延伸方向における前記供給口側の位置に設けられ、前記流路の一部の区間の前記延伸方向に対する横断面積を前記流路の他の区間の前記延伸方向に対する横断面積と比較して縮小させることで前記気体を冷却する、請求項1に記載の成形システム。
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EP20796082.4A EP3960323A4 (en) | 2019-04-22 | 2020-03-03 | MOLDING SYSTEM |
CA3127032A CA3127032A1 (en) | 2019-04-22 | 2020-03-03 | Molding system |
KR1020217019777A KR20210154136A (ko) | 2019-04-22 | 2020-03-03 | 성형시스템 |
CN202080008005.2A CN113677450B (zh) | 2019-04-22 | 2020-03-03 | 成型系统 |
US17/391,771 US11772148B2 (en) | 2019-04-22 | 2021-08-02 | Forming system |
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JP2016190252A (ja) * | 2015-03-31 | 2016-11-10 | 住友重機械工業株式会社 | 成形装置 |
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EP3960323A1 (en) | 2022-03-02 |
US20210354187A1 (en) | 2021-11-18 |
CA3127032A1 (en) | 2020-10-29 |
US11772148B2 (en) | 2023-10-03 |
CN113677450A (zh) | 2021-11-19 |
KR20210154136A (ko) | 2021-12-20 |
CN113677450B (zh) | 2023-07-11 |
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JPWO2020217716A1 (ja) | 2020-10-29 |
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