WO2014024384A1 - スピニング成形装置および成形方法 - Google Patents
スピニング成形装置および成形方法 Download PDFInfo
- Publication number
- WO2014024384A1 WO2014024384A1 PCT/JP2013/004373 JP2013004373W WO2014024384A1 WO 2014024384 A1 WO2014024384 A1 WO 2014024384A1 JP 2013004373 W JP2013004373 W JP 2013004373W WO 2014024384 A1 WO2014024384 A1 WO 2014024384A1
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- WIPO (PCT)
- Prior art keywords
- plate material
- heater
- processing tool
- molding
- spinning
- 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
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
-
- 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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/14—Spinning
- B21D22/16—Spinning over shaping mandrels or formers
-
- 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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/14—Spinning
- B21D22/18—Spinning using tools guided to produce the required profile
-
- 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
- the present invention relates to a spinning molding apparatus and a spinning molding method that perform molding while rotating a plate material to be molded around a rotation axis.
- a spinning molding method in which a plate material such as a steel material, an aluminum alloy, or pure titanium is rotated around a predetermined rotation axis and a processing tool is brought into contact with the plate material to process and mold the plate material. .
- titanium alloys in order to reduce material costs and processing costs, instead of processing by forging from forgings, a spinning molding method that processes plate materials Application is desired.
- titanium alloys such as Ti-6Al-4V, for example, have high yield strength at room temperature and poor ductility. Therefore, if the conventional spinning forming method in cold (room temperature) is applied as it is, Cracking occurs and molding cannot be performed successfully. For this reason, it is necessary to heat the plate material and perform hot spinning.
- Patent Document 1 discloses such hot spinning molding.
- the plate material is processed after the surface of the plate material is heated by a burner.
- the plate material is heated in a wide range. For this reason, non-molding places, such as a non-molding location, a shape-formed location, a non-molding location, etc. of a board material will also be heated. Therefore, depending on the material of the plate material and its shape (particularly thickness), there is a problem that deformation occurs in the unformed portion of the plate material due to stress generated during processing, and high-precision processing cannot be performed. There was a problem that cracking occurred in the finished part.
- Patent Document 2 has been proposed as a spinning molding apparatus that locally heats a position close to a molding site.
- a high-frequency induction heating coil that is a heater is arranged from between a spatula that is a processing tool and a position on the unmolded side of the plate material toward a contact position between the processing tool and the plate material.
- the present invention has been made to solve the above-described problems, and a spinning molding apparatus capable of performing molding without causing deformation or cracking in the plate material by appropriately heating the molding portion of the plate material. And it aims at providing a spinning shaping
- the inventors of the present invention do not heat specific plate materials such as titanium alloy plates and thick stainless steel plates when locally heating the plate materials. It has been found that rigidity may be ensured at a location, and therefore a plate material can be molded into a desired shape without using a molding die.
- the present invention has been made from such a viewpoint.
- a spinning molding apparatus is a spinning molding apparatus that performs molding while rotating a plate material to be molded around a rotation axis, and a receiving jig to which the plate material is attached, and the plate material to the receiving jig.
- a rotating member that rotates around the rotation axis, a processing tool that processes and forms the plate material by contacting the first main surface of the plate material, and a heater that heats the plate material
- the heater is disposed on the opposite side of the processing tool across the plate material, and is located on the same circumference as the position where the processing tool of the plate abuts around the rotation axis, It is comprised so that the 2nd main surface on the opposite side to the 1st main surface of the said board
- a space can be secured on the side opposite to the processing tool of the plate material forming portion, and a heater can be disposed in the space. it can.
- the second main surface of the plate material opposite to the first main surface with which the processing tool abuts is locally heated, so that the plate material is appropriately formed regardless of the positional relationship between the processing tool and the plate material. Can be heated.
- the plate material is attached to a receiving jig that is not a molding die, it is possible to make the molding part non-contact with the receiving jig, and heat due to heating is not directly transferred to the receiving jig, and the molding die Heating can be performed more efficiently than when used. Therefore, it can shape
- the receiving jig may have a size smaller than a circle defined by a forming start position in the plate material. Thereby, appropriate heating can be performed from the molding start position.
- the heater may be one that performs heating by high frequency induction heating. Thereby, local heating can be performed easily and efficiently.
- the spinning forming apparatus may include a preheater that preheats the plate material at a position radially outside the contact position of the processing tool on the plate material. Thereby, heating to the temperature required for shaping
- the heater may include a coil formed in a double arc shape in a direction orthogonal to the rotation axis. Thereby, the same circumference as a forming location can be heated more efficiently.
- the heater may include a magnetic core that covers the coil from the opposite side of the plate, and a non-magnetic protrusion that protrudes toward the plate beyond the coil and the core. Accordingly, the magnetic flux generated in the coil is prevented from leaking to the outside using the core covered with the coil, so that the magnetic flux can be concentrated and heat can be generated more locally and efficiently. Furthermore, it can prevent that a coil and a core contact a board
- the spinning forming apparatus may include an auxiliary tool that supports the plate material at a position radially outside the contact position of the processing tool. Thereby, a board
- the spinning forming apparatus includes a control device that controls the heater to move relative to the plate material so that a distance between the heater and a forming portion of the plate material is a predetermined distance. It may be. Thereby, even if a board
- the spinning molding apparatus may include a control device that controls the heater to move in synchronization with a molding operation by the processing tool.
- the spinning molding apparatus adjusts the output of the heater and a radiation thermometer that measures the surface temperature of the plate material at a position on the same circumference centering on the rotation axis with the contact position of the processing tool.
- An output regulator, and the output regulator may regulate the output of the heater so that the surface temperature is within a predetermined temperature range.
- the spinning forming apparatus controls a load measuring device that measures a load caused by contact of the processing tool against the plate material, and a relative movement of the processing tool with respect to the plate material at a feeding speed corresponding to the load. And a control device.
- a load measuring device that measures a load caused by contact of the processing tool against the plate material, and a relative movement of the processing tool with respect to the plate material at a feeding speed corresponding to the load.
- a control device When the feed rate of the processing tool with respect to the plate material when the plate material is rotated is high, the forming speed is high, but the load becomes large and the risk of deformation and cracking increases. On the other hand, when the feed speed is slow, the load is reduced, but the molding speed is slow. Therefore, by controlling the feed speed of the processing tool so that the load is within a predetermined range, appropriate molding can be performed without reducing the molding speed as much as possible.
- the plate material may be made of a titanium alloy.
- a spinning molding method is a spinning molding method in which molding is performed while rotating a plate material to be molded around a rotation axis, and the plate material is attached to a receiving jig of a holding member.
- a heater is arranged on the opposite side of the processing tool across the plate material when the plate material is processed and formed by bringing the processing tool into contact with the first main surface of the plate material while rotating around the rotation axis.
- plate material is locally heated in the position on the same periphery as the position where the said processing tool of the said board
- a space can be secured on the side opposite to the processing tool of the forming portion of the plate material, and a heater can be disposed in the space. it can.
- the second main surface of the plate material opposite to the first main surface with which the processing tool abuts is locally heated, so that the plate material is appropriately formed regardless of the positional relationship between the processing tool and the plate material. Can be heated.
- the plate material is attached to a receiving jig that is not a molding die, it is possible to make the molding part non-contact with the receiving jig, and heat due to heating is not directly transferred to the receiving jig, and the molding die Heating can be performed more efficiently than when used. Therefore, it can shape
- the present invention is configured as described above, and has an effect that molding can be performed without causing deformation or cracking in a plate material by appropriately heating a molding portion of the plate material.
- FIG. 1 is a schematic configuration diagram showing a spinning molding apparatus according to a first embodiment of the present invention.
- 2A is a bottom view showing the relationship between the rotating shaft, processing tool and heater of the spinning molding apparatus shown in FIG. 1, and
- FIG. 2B is a sectional view of the heater.
- FIG. 3 is a flowchart showing an example of a control mode of the spinning molding apparatus shown in FIG.
- FIG. 4 is a schematic configuration diagram showing a spinning molding apparatus according to the second embodiment of the present invention.
- FIG. 5 is a graph showing the relationship of the surface temperature difference between the back side and the front side of the plate material with respect to the plate thickness of the plate material.
- FIG. 6 is a schematic configuration diagram showing a spinning molding apparatus according to the third embodiment of the present invention.
- FIG. 1 is a schematic configuration diagram showing a spinning molding apparatus according to a first embodiment of the present invention.
- the spinning forming apparatus 101 in the present embodiment includes a holding member 1 that rotates a plate material W around a rotation axis S.
- the rotation axis S extends in the vertical direction, but the direction in which the rotation axis S extends may be a horizontal direction or an oblique direction.
- the plate member W which is a material to be molded, is attached to the holding member 1 without using a molding die. More specifically, the holding member 1 has a receiving jig 2 having a receiving surface P substantially perpendicular to the rotation axis S, and a rotation in which the receiving jig 2 is attached so as not to rotate relative to the plate member W and rotates together with the receiving jig 2.
- a shaft 10 is included.
- the rotation axis S described above is the central axis of the rotation shaft 10.
- the plate material W is attached on the receiving surface P of the receiving jig 2. That is, the plate material W is disposed so as to intersect the rotation axis S substantially perpendicularly.
- the plate material W is fixed to the receiving surface P by a fixing jig 3 disposed above the plate material W so as to face the receiving surface P of the receiving jig 2.
- the rotation shaft 10 of the holding member 1 rotates about the rotation axis S, whereby the plate material W rotates about the rotation axis S.
- plate material W in this specification is not restricted to a flat plate.
- the plate material W may be a plate material that includes a curved surface at least in part or a plate material that is bent in advance (a material in the middle of molding or a material after molding).
- the plate material W includes a material whose thickness is partially different from the other portions, such as, for example, pasting another plate material to a part of the plate material or integrally forming by casting.
- the material of the plate material W is not particularly limited.
- metal materials that are difficult to work in the cold such as titanium alloy, nickel base alloy, cobalt base alloy, high strength steel, high strength stainless steel, and magnesium alloy are suitable. is there.
- a material having a large difference in yield strength between normal temperature and high temperature (molding temperature) such as a titanium alloy
- cracking and deformation are likely to occur in the conventional method. For this reason, it is effective to apply this embodiment in shaping
- the present embodiment can be similarly applied to a metal material such as an aluminum alloy or pure titanium that can be processed in a cold state. Even if it is a metal material which can be processed in the cold, it is effective to apply this embodiment when the thickness of the plate is thick.
- Titanium alloys include corrosion resistant alloys (eg, Ti-0.15Pd), ⁇ alloys (eg, Ti-5Al-2.5Sn), ⁇ + ⁇ alloys (eg, Ti-6Al-4V), ⁇ alloys (Ti-15V- 3Cr-3Sn-3Al).
- corrosion resistant alloys eg, Ti-0.15Pd
- ⁇ alloys eg, Ti-5Al-2.5Sn
- ⁇ + ⁇ alloys eg, Ti-6Al-4V
- ⁇ alloys Ti-15V- 3Cr-3Sn-3Al
- the spinning forming apparatus 101 includes a processing tool 4 for processing and forming a plate material by contacting the first main surface of the plate material W attached to the receiving jig 2, and a heater 5 for heating the plate material W. It has more.
- the first main surface with which the processing tool 4 abuts is the upper surface
- the second main surface opposite to the first main surface is the lower surface, but the first main surface is the lower surface and the second main surface is the upper surface.
- the heater 5 is disposed on the opposite side of the processing tool 4 with the plate material W interposed therebetween.
- the heater 5 is comprised so that the 2nd main surface of the board
- the same circumference means, for example, a range in which the distance from the rotation axis S is r ⁇ 10%, where r is the distance between the rotation axis S and the position where the processing tool 4 of the plate material W abuts.
- the receiving jig 2 is a flat disk-shaped plate material in the present embodiment.
- the receiving jig 2 does not necessarily have to be flat.
- the center of the receiving surface P may be raised or depressed depending on the direction of the plate material W. Good.
- the receiving jig 2 may have, for example, a cross beam shape in which a plurality of bar members are combined vertically and horizontally.
- the plate member W is provided with one or a plurality of through holes in a region overlapping with the receiving jig 2, and a positioning pin that fits into the through hole is provided on the receiving surface P of the receiving jig 2. It may be done.
- the receiving jig 2 may have the same size as the circle defined by the molding start position in the plate material W, but it is desirable to have a size smaller than that circle. That is, it is desirable that the peripheral edge portion of the receiving jig 2 is spaced radially inward from the forming start position of the plate material W so that the heater 5 can be disposed directly below the forming start position of the plate material W.
- a configuration including one processing tool 4 is illustrated, but the present invention is not limited thereto, and a plurality of processing tools 4 may be provided.
- the plurality of processing tools are arranged so as to be in contact with the first main surface of the plate material W, respectively. Further, the plurality of processing tools may be arranged, for example, 180 degrees apart around the rotation axis S on the same circumference around the rotation axis S. If the side on which the processing tool 4 is located is the front side of the plate material W, the heater 5 is disposed on the back side of the plate material W.
- FIG. 2A is a diagram showing the relationship between the rotating shaft, the processing tool, and the heater of the spinning molding apparatus shown in FIG. 2A is a bottom view seen from the back side of the plate material (side on which the heater is located), and the configuration other than the rotating shaft 10, the processing tool 4, the heater 5, and the plate material W shown in FIG. is doing.
- the processing tool 4 includes a processing roller that rotates around a rotation axis Q that forms a predetermined angle (about 90 ° in the example of FIG. 1) with the rotation axis S, for example.
- the processing tool 4 is located on the surface side of the plate material W, and the plate material W is ironed or drawn by a processing roller rotating around the rotation axis Q contacting the first main surface of the plate material W.
- the heater 5 is located on the back side of the plate material W. Both the processing tool 4 and the heater 5 are configured to be movable three-dimensionally (at least in the axial direction and the radial direction of the rotation axis S) with respect to the holding member 1 independently of each other. The position is controlled so that the distance is the same distance r (r is variable). In addition, the processing tool 4 is not restricted to what has the said processing roller, For example, you may have a spatula etc.
- the heater 5 includes a coil 61 that heats the second main surface of the plate W by high-frequency induction heating.
- the high frequency induction heating is, for example, induction heating with a frequency of 5 kHz to 400 kHz.
- a current is supplied from the induction heating power supply 11 to the coil 61.
- the position of the heater 5 is opposite to the side on which the processing tool 4 of the plate material W abuts, and is on the same circumference around the rotation axis S as the position where the processing tool 4 of the plate material W abuts.
- plate material W can be locally heated in a position, it is not limited to this.
- the central angle ⁇ between the heater 5 and the processing tool 4 is a predetermined angle (0 ° ⁇ ⁇ ⁇ 360 °). You may arrange so that it may become.
- the coil 61 of the heater 5 is formed in a double arc shape in a direction orthogonal to the rotation axis S. Specifically, the coil 61 has an inner arc portion and an outer arc portion that are parallel to each other. 2B, the heater 5 includes a core 62 that individually covers the inner arc portion and the outer arc portion of the coil 61 from the side opposite to the plate material W, a base plate 64 that supports the core 62, and the core 62. A convex portion 63 provided on the base plate 64 on the radially outer side is included.
- the core 62 is a magnetic body and collects magnetic flux generated around each arc portion of the coil 61.
- the convex portion 63 is a non-magnetic material, and protrudes toward the plate material W beyond the coil 61 and the core 62. If the convex portion 63 is provided in this way, the convex portion 63 can prevent the coil 61 and the core 62 from coming into contact with the plate material W. As a result, an electrical short circuit of the coil 61 can be prevented, and a high skin effect can be obtained at a location facing the core 62 on the second main surface of the plate material W. From the viewpoint of preventing an electrical short circuit of the coil 61, an insulating paint may be applied to the surface of the coil 61.
- the coil 61 of the heater 5 is formed in a crescent shape such that an angle formed in the circumferential direction between the both ends of the arc and the rotation axis S is approximately 90 °. Thereby, the same circumference centering on the shaping
- the shape of the coil 61 is not limited to this, and the angle formed in the circumferential direction between the both ends of the arc and the rotation axis S may be an angle other than 90 °, and a linear portion is included in a part of the arc. Alternatively, it may be formed so as to include a combination of straight lines (in the form of a broken line). Further, instead of the arc-shaped coil 61, a plurality of circularly wound coils (cylinder winding coil) may be arranged in an arc shape, or only one cylindrical winding coil may be used as the coil of the heater 5. Good.
- the receiving jig 2 since the receiving jig 2 is used instead of the forming die, a space can be secured on the side opposite to the processing tool 4 of the forming portion A of the plate material W.
- the heater 5 can be arrange
- the plate material W since the second main surface of the plate material W opposite to the first main surface with which the processing tool 4 abuts is locally heated, the plate material W is independent of the positional relationship between the processing tool 4 and the plate material W.
- the molding part A can be efficiently heated. Further, since the plate material W is attached to the receiving jig 2 that is not a molding die, the molding location A can be made non-contact with the receiving jig 2.
- a molding die is generally provided on the side of the plate member W opposite to the side on which the processing tool 4 abuts.
- the heating coil of the heater 5 is provided. It was difficult to place. This is because the heating coil is an induction heating coil made of a copper tube having a thickness of about several millimeters, and a magnetic flux concentrating core having a thickness of several millimeters to 30 mm is attached to a part of the coil. is there. In this way, a certain amount of space is required to arrange the heating coil, and if the heating coil is to be arranged immediately below the molding location A while using the molding die, the molding die and the heater come into contact with each other. Absent.
- this embodiment it is set as the structure which does not use a shaping
- a vessel 5 is arranged.
- the shape of the heating coil of the heater 5 is limited by the shape of the plate material W, but the side on which the processing tool 4 comes into contact with the plate material W Since the heating coil of the heater 5 is arranged on the opposite side (the side where the mold is present in the conventional configuration), the shape of the heating coil of the heater 5 is limited to the molding shape of the plate material W. There is no. Therefore, according to the structure of this embodiment, since the heater 5 is arrange
- the receiving jig 2 that is much smaller than the mold, the heat generated by the heating of the heater 5 is not directly transferred to the receiving jig 2 and is heated more efficiently than when the mold is used. can do. Furthermore, in this embodiment, heating by high frequency induction heating is performed. Thereby, local heating can be performed easily and efficiently. Moreover, since the manufacturing cost of a shaping
- the receiving jig 2 may have the same size as the circle defined by the molding start position in the plate material W. However, in this case, only in the vicinity of the molding start position, the heating position of the heater 9 cannot be set on the same circumference as the contact position of the processing tool due to interference between the heater 5 and the receiving jig 2. On the other hand, if the receiving jig 2 has a size smaller than the circle defined by the molding start position in the plate material W, appropriate heating can be performed from the molding start position.
- the spinning molding apparatus 101 controls the rotation of the rotary shaft 10 and controls the position of the processing tool 4 and the heater 5, and the plate material of the processing tool 4.
- a load measuring device 13 for measuring a load due to contact with W and a displacement sensor 14 for detecting the position of the forming portion A of the plate material W are further provided.
- the spinning molding apparatus 101 includes a radiation thermometer 15 that measures the surface temperature of the plate material W at a position on the same circumference centered on the rotation axis S and the contact position of the processing tool 4; And an output regulator 16 that regulates the output of the heater 5.
- the output adjuster 16 is configured to adjust the output of the heater 5 by changing the current value output from the induction heating power supply 11.
- the spinning molding apparatus 101 includes a control device 17 that transmits a control command to each component in accordance with molding conditions and the operation status of each component.
- the control device 17 includes an operation status from the molding machine controller 12 (control status of the holding member 1, the processing tool 4, and the heater 5), load information and displacement from the load measuring device 13 to the plate material W of the processing tool 4.
- the control device 17 Based on the position information of the forming point A of the plate material W from the sensor 14, the rotation control of the rotary shaft 10 and the position control of the processing tool 4 and the heater 5 are performed, and the position control of the displacement sensor 14 and the radiation thermometer 15 is performed.
- the control device 17 performs output control of the heater 5 based on the surface temperature information of the forming portion A of the plate material W from the radiation thermometer 15.
- FIG. 3 is a flowchart showing an example of a control mode of the spinning molding apparatus shown in FIG.
- the control device 17 first determines the rotation speed of the holding member 1 and the feed speed of the processing roller of the processing tool 4 according to the type, shape, size, thickness, and the like of the plate material W (rotating shaft).
- the control device 17 may acquire the information from an external device, or the spinning molding device 101 has a storage unit, and the control device 17 acquires the information by reading the information stored in the storage unit. It is good as well.
- the control device 17 positions the processing tool 4, the heater 5, the displacement sensor 14, and the radiation thermometer 15 (step S2). Specifically, the control device 17 positions the processing tool 4 so that the processing roller of the processing tool 4 abuts on a predetermined forming position A on the plate material W, and the forming position A (the same centering on the rotation axis S).
- the heater 5 is positioned so as to heat the circumferential region
- the displacement sensor 14 is positioned so that the displacement of the molding location A can be measured
- the radiation thermometer so that the surface temperature of the molding location A can be measured. 15 is positioned.
- the control device 17 rotates the rotating shaft 10 around the rotation axis S to rotate the plate material W and starts heating the forming portion A of the plate material W by the heater 5 (step S3). .
- the control device 17 acquires the surface temperature of the molding location A detected by the radiation thermometer 15 and determines whether or not the surface temperature of the molding location A is within a moldable range (step S4).
- a plate material W made of a titanium alloy Ti-6Al-4V
- 500 to 1000 ° C. can be set as a formable range.
- the output adjuster 16 adjusts the output of the heater 5 so that the surface temperature of the plate W measured by the radiation thermometer 15 is within a predetermined temperature range. Thereby, since the output of the heater 5 is adjusted based on the temperature of the molding location A of the actual plate material W, the temperature of the molding location A of the plate material W can be adjusted more appropriately. Moreover, in this embodiment, the surface temperature of the 1st main surface in which the processing tool 4 contacts in the board
- step S4 molding by the processing of the molding location A is started using the processing tool 4 (step S5).
- step S5 the heater 5 is turned on until the surface temperature of the molding location A reaches a temperature within the moldable range. Adjust the output.
- the control device 17 controls the heater 5 to move in synchronization (synchronization) with the molding operation by the processing tool 4.
- the heater 5 is moved following the movement of the processing tool 4, and after the heating by the heater 5 is completed (the surface temperature of the molding point A is within a moldable range). And) starting the forming by the processing tool 4 (the processing roller is brought into contact with the forming portion A of the plate material W).
- the heater 5 moves according to the shaping
- molding is attained.
- the molding part A can be reliably heated by the heater 5 and then molded by the processing tool 4, a good molded product can be obtained.
- control device 17 controls the processing tool 4 so as to move relative to the plate material W at a feed speed corresponding to the load detected by the load measuring device 13. Specifically, the control device 17 determines whether or not the load detected by the load measuring instrument 13 is within a preset formable range (step S6). If it is determined that the load is within the moldable range (Yes in step S6), the processing is continued. If it is determined that the load is outside the formable range (No in step S6), control is performed to change the feed speed of the processing roller (step S7). Control for changing the feed speed of the processing roller is repeatedly performed until the load falls within a formable range.
- the feed speed of the processing tool 4 with respect to the plate material W when the plate material W is rotated is high, the forming speed is high, but the load increases and the risk of cracking and deformation increases.
- the feed speed is slow, the load is reduced, but the molding speed is slow. Therefore, by controlling the feed speed of the processing tool 4 so that the load is within a predetermined range, it is possible to perform appropriate molding without reducing the molding speed as much as possible.
- control device 17 forms the heater 5 and the plate material W from the position information of the forming portion A of the plate material W detected by the displacement sensor 14 and the position control information of the heater 5 obtained from the molding machine controller 12. It is determined whether the distance h from the location A is within a predetermined range (for example, 1 mm to 10 mm) (step S8). When the distance h between the heater 5 and the molding location A is within a predetermined range (Yes in step S8), the processing is continued. When the distance h is not within the predetermined range (No in step S8), the heater 5 is controlled to move relative to the plate material W so that the distance h becomes a predetermined distance. (Step S9).
- a predetermined range for example, 1 mm to 10 mm
- plate material W can be kept constant. it can.
- the heater 5 using the high frequency induction heating coil 61 as in the present embodiment when the distance h of the coil 61 with respect to the forming portion A of the plate material W changes, the amount of heat applied from the coil 61 to the plate material W is increased. It changes relatively. Therefore, by keeping the distance h between the heater 5 and the molding point A of the plate material W constant, heating to the molding point A of the plate material W during processing can be made constant regardless of the processing state. .
- step S10 determines whether shaping
- the processing tool 4 and the heater 5 can be appropriately controlled based on this, and the plate material W can be controlled. It can be formed into a desired shape with high accuracy.
- plate material W can be grasped
- plate material W can also be made high without using a shaping
- the structure using the coil 61 for high frequency induction heating was demonstrated as the heater 5, it exists on the same periphery as the position where the processing tool 4 of the board
- a friction heater can be employed as the heater 5.
- FIG. 4 is a schematic configuration diagram showing a spinning molding apparatus according to the second embodiment of the present invention.
- the spinning molding apparatus 102 in the present embodiment is different from the first embodiment in that, as shown in FIG. 4, a position (plate material in the molding progression direction) radially outside the contact position (molding location A) of the processing tool 4. It is further provided with a preheater 7 for preliminarily heating the plate material W at a position on the unformed portion side of W (preheating portion B).
- the configuration related to the control of the control device 17 and the load measuring device 13 is omitted.
- the forming progress direction is defined as the direction in which forming by the processing tool 4 on the plate material W proceeds.
- the molding progress direction is a direction from the inside in the radial direction of the rotation axis S to the outside.
- the preheater 7 is disposed on the outer side in the radial direction of the rotation axis S than the heater 5.
- the pre-heater 7 has a diameter of the rotary shaft S from the side (the forming location A) where the heater 5 of the plate W is heated, on the side opposite to the side heated by the heater 5 of the plate W.
- the position outside the direction and the position (preheating point B) on the same circumference centering on the rotation axis S are configured to be heated. That is, the preheater 7 is configured to preliminarily heat the unformed portion of the plate material W.
- the preheater 7 employs high-frequency induction heating as with the heater 5, but the preheater 7 may be heated by a burner or the like.
- the preheater 7 includes a coil formed in a double arc shape in a direction orthogonal to the rotation axis S, similarly to the heater 5. Since the distance from the rotation axis S to the preheater 7 is longer than the distance from the rotation axis S to the heater 5, the radius of curvature of the coil of the preheater 7 is larger than the radius of curvature of the coil 61 of the heater 5. It is desirable.
- the output of the pre-heater 7 is adjusted so that the temperature of the pre-heating location B becomes a temperature at which the pre-heating location B does not deform due to the influence of the pressing force on the forming location A of the processing tool 4.
- the output of the preheater 7 may be lower than the output of the heater 5, and in addition to or in addition to this.
- the distance between the preheater 7 and the plate material W may be longer than the distance between the heater 5 and the plate material W in the heater having the same output.
- the preheating location B is adjacent to the molding location A.
- the preheating portion B which is an unmolded portion is preliminarily heated by the preheater 7, the temperature rises quickly during local heating by the heater 5. Thereby, even when the processing speed is increased or the plate material W is thick, heating to a temperature necessary for forming can be efficiently performed without decreasing the processing speed.
- Such preheating can be appropriately used according to the type of the plate material W, the plate thickness of the plate material W, the heating temperature, and the ability of the processing tool 4 (for example, the thrust of the processing roller).
- the necessity of preheating can be examined according to the relationship between the plate thickness of the plate material W, the surface temperature difference between the front and back surfaces of the plate material W, and the ability of the processing tool 4.
- FIG. 5 is a graph showing the relationship of the surface temperature difference between the back surface and the front surface of the plate material with respect to the plate thickness of the plate material.
- a region X region having a plate thickness Dth or more and a surface temperature difference Tth or more indicated by hatching indicates an effective region using preheating.
- This region X changes according to the thrust of the processing roller, which is one of the capabilities of the processing tool 4. That is, as the thrust of the processing roller increases, the plate thickness threshold value Dth and the surface temperature difference threshold value Tth become larger. Further, when the thrust of the processing roller decreases, the plate thickness threshold value Dth and the surface temperature difference threshold value Tth become smaller values. In short, when the thrust of the processing roller is reduced, it is preferable to perform preheating even with a smaller plate thickness or surface temperature difference.
- the preheater 7 When the forming progress direction is a direction from the radially outer side to the inner side of the rotating shaft S, the preheater 7 is positioned radially inside the rotating shaft S from the position where the heater 5 of the plate material W is heated. The same effect can be obtained by heating a position on the same circumference around the rotation axis S. In addition, the preheater 7 can be heated as much as possible at a position radially outside the rotation axis S from a position where the heater 5 of the plate material W is heated and a position on the same circumference around the rotation axis S. You may arrange. For example, the preheater 7 may be disposed so as to heat the same side of the plate W as the heater 5. In the present embodiment, the preheater 7 is disposed at substantially the same position in the circumferential direction around the heater 5 and the rotation axis S, but may be disposed at a position shifted in the circumferential direction.
- FIG. 6 is a schematic configuration diagram showing a spinning molding apparatus according to the third embodiment of the present invention.
- the spinning molding apparatus 103 in the present embodiment is different from the first embodiment in contact with an unformed portion of the plate material W, and at a position radially outside the contact position of the processing tool 4.
- the auxiliary tool 8 for supporting the plate material W is further provided.
- the configuration related to the control of the control device 17 and the load measuring device 13 is omitted.
- the auxiliary tool 8 is constituted by an auxiliary roller that is driven to rotate by being brought into contact with an unformed portion of the plate material W.
- the configuration of the auxiliary tool 8 is not limited to such a roller as long as the configuration does not damage the plate material W while being in contact with the plate material W (the frictional force due to contact is small).
- the plate material W can be stabilized and heated and processed efficiently. That is, by holding the unformed portion of the plate material W by the auxiliary tool 8, it is possible to suppress the shake in the rotation axis S direction of the outer peripheral edge of the plate material W that is generated when the processing tool 4 performs processing. Thereby, the heating by the heater 5 can be made uniform regardless of the forming location of the plate material W. Furthermore, the pressing force applied to the plate material W of the processing tool 4 can be made uniform regardless of the forming position of the plate material W. Therefore, the molding accuracy of the plate material W can be increased.
- the auxiliary tool 8 may be provided on the same side as the side on which the processing tool 4 of the plate material W abuts, or may be provided on the opposite side.
- the assisting tool 8 may be one or more.
- the spinning molding apparatus and the spinning molding method of the present invention are useful for performing molding without causing deformation or cracking in the plate material by appropriately heating the molding portion of the plate material.
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Abstract
Description
図1は本発明の第1実施形態におけるスピニング成形装置を示す概略構成図である。図1に示すように、本実施形態におけるスピニング成形装置101は、板材Wを回転軸(rotational axis)S回りに回転する保持部材1を備えている。本実施形態では、回転軸Sは鉛直方向に延びているが、回転軸Sが延びる方向は水平方向であってもよいし、斜め方向であってもよい。
以下に、本発明の第2実施形態におけるスピニング成形装置について説明する。図4は本発明の第2実施形態におけるスピニング成形装置を示す概略構成図である。本実施形態において第1実施形態と同様の構成については同じ符号を付し説明を省略する。本実施形態におけるスピニング成形装置102が第1実施形態と異なる点は、図4に示すように、加工具4の当接位置(成形箇所A)よりも径方向外側の位置(成形進行方向における板材Wの未成形箇所側にある位置(予備加熱箇所B))で、板材Wを予備的に加熱する予備加熱器7をさらに備えていることである。なお、図4には制御装置17や負荷計測器13などの制御に関する構成は図示を省略している。
以下に、本発明の第3実施形態におけるスピニング成形装置について説明する。図6は本発明の第3実施形態におけるスピニング成形装置を示す概略構成図である。本実施形態におけるスピニング成形装置103が第1実施形態と異なる点は、図6に示すように、板材Wの未成形箇所に当接し、加工具4の当接位置よりも径方向外側の位置で板材Wを支持する補助具8をさらに備えていることである。なお、図6には制御装置17や負荷計測器13などの制御に関する構成は図示を省略している。
2 受け治具
3 固定治具
4 加工具
5 加熱器
61 コイル
62 コア
63 凸部
7 予備加熱器
8 補助具
10 回転シャフト
11 誘導加熱電源
12 成形機コントローラ
13 負荷計測器
14 変位センサ
15 放射温度計
16 出力調節器
17 制御装置
101~103 スピニング成形装置
P 受け面
Q 加工具の回転軸
S 保持部材の回転軸
W 板材
Claims (18)
- 成形する板材を回転軸回りに回転させながら成形を行うスピニング成形装置であって、
前記板材が取り付けられる受け治具、および前記板材を前記受け治具と共に前記回転軸回りに回転させる回転シャフト、を含む保持部材と、
前記板材の第1主面に当接させることにより板材を加工して成形する加工具と、
前記板材を加熱する加熱器と、を備え、
前記加熱器は、前記板材を挟んで前記加工具と反対側に配置されており、前記回転軸を中心として前記板材の前記加工具が当接する位置と同一周上にある位置で、前記板材の第1主面と反対側の第2主面を局所的に加熱するよう構成されている、スピニング成形装置。 - 前記受け治具は、前記板材における成形開始位置によって規定される円よりも小さなサイズを有している、請求項1に記載のスピニング成形装置。
- 前記加熱器は、高周波誘導加熱による加熱を行うものである、請求項1または2に記載のスピニング成形装置。
- 前記板材における前記加工具の当接位置よりも径方向外側の位置で前記板材を予備的に加熱する予備加熱器を備える、請求項1~3の何れかに記載のスピニング成形装置。
- 前記加熱器は、前記回転軸と直交する方向に二重の円弧状に形成されたコイルを含む、請求項1~4の何れかに記載のスピニング成形装置。
- 前記加熱器は、前記コイルを前記板材と反対側から覆う磁性体のコアと、前記コイルおよび前記コアを超えて前記板材に向かって突出する非磁性体の凸部を含む、請求項5に記載のスピニング成形装置。
- 前記加工具の当接位置よりも径方向外側の位置で前記板材を支持する補助具を備える、請求項1~6の何れかに記載のスピニング成形装置。
- 前記加熱器と前記板材の成形箇所との距離が予め定められた距離となるように、前記加熱器を前記板材に対して相対移動させるように制御する制御装置を備える、請求項1~7の何れかに記載のスピニング成形装置。
- 前記加熱器を、前記加工具による成形動作に同調して移動させるように制御する制御装置を備える、請求項1~8の何れかに記載のスピニング成形装置。
- 前記加工具の当接位置と前記回転軸を中心とする同一周上にある位置で、前記板材の表面温度を計測する放射温度計と、
前記加熱器の出力を調節する出力調節器と、を備え、
前記出力調節器は、前記表面温度が所定の温度範囲内になるように前記加熱器の出力を調節する、請求項1~9の何れかに記載のスピニング成形装置。 - 前記加工具の前記板材への当接による負荷を計測する負荷計測器と、
前記加工具を、前記負荷に応じた送り速度で前記板材に対して相対移動させるように制御する制御装置と、を備える、請求項1~10の何れかに記載のスピニング成形装置。 - 前記板材は、チタン合金からなる、請求項1~11の何れかに記載のスピニング成形装置。
- 成形する板材を回転軸回りに回転させながら成形を行うスピニング成形方法であって、
前記板材を保持部材の受け治具に取り付けて当該板材を前記回転軸回りに回転させながら、前記板材の第1主面に加工具を当接させて前記板材を加工して成形する際に、前記板材を挟んで前記加工具と反対側に加熱器を配置し、前記回転軸を中心として前記板材の前記加工具が当接する位置と同一周上にある位置で、前記板材の第1主面と反対側の第2主面を局所的に加熱する、スピニング成形方法。 - 前記板材における前記加工具の当接位置よりも径方向外側の位置で前記板材を予備的に加熱する、請求項13に記載のスピニング成形方法。
- 前記局所的な加熱を行う前記加熱器と前記板材の成形箇所との距離が、予め定められた距離となるように、前記加熱器を前記板材に対して相対移動させる、請求項13または14に記載のスピニング成形方法。
- 前記局所的な加熱を行う前記加熱器を、前記加工具による成形動作に同調して移動させる、請求項13~15の何れかに記載のスピニング成形方法。
- 前記加工具の当接位置と前記回転軸を中心とする同一周上にある位置で、前記板材の表面温度を計測し、当該表面温度が所定の温度範囲内になるように前記局所的な加熱を行う前記加熱器の出力を調節する、請求項13~16の何れかに記載のスピニング成形方法。
- 前記加工具の前記板材への当接による負荷を計測し、
前記加工具を、前記負荷に応じた送り速度で前記板材に対して相対移動させる、請求項13~17の何れかに記載のスピニング成形方法。
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JPWO2014024384A1 (ja) | 2016-07-25 |
CA2880666C (en) | 2017-04-25 |
CN104487185B (zh) | 2016-05-18 |
KR20150017001A (ko) | 2015-02-13 |
CA2880666A1 (en) | 2014-02-13 |
EP2883629A1 (en) | 2015-06-17 |
SG11201501000PA (en) | 2015-04-29 |
JP5751687B2 (ja) | 2015-07-22 |
EP2883629A4 (en) | 2016-01-06 |
KR101508108B1 (ko) | 2015-04-07 |
US20150202677A1 (en) | 2015-07-23 |
EP2883629B1 (en) | 2021-05-12 |
US10092941B2 (en) | 2018-10-09 |
CN104487185A (zh) | 2015-04-01 |
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