WO2013145929A1 - 複合加工方法及び複合加工装置 - Google Patents
複合加工方法及び複合加工装置 Download PDFInfo
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- WO2013145929A1 WO2013145929A1 PCT/JP2013/053818 JP2013053818W WO2013145929A1 WO 2013145929 A1 WO2013145929 A1 WO 2013145929A1 JP 2013053818 W JP2013053818 W JP 2013053818W WO 2013145929 A1 WO2013145929 A1 WO 2013145929A1
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- cutting
- hole
- original plate
- machining
- thermal
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- 238000012545 processing Methods 0.000 title claims abstract description 84
- 238000003672 processing method Methods 0.000 title claims description 23
- 238000005520 cutting process Methods 0.000 claims abstract description 303
- 238000003754 machining Methods 0.000 claims abstract description 94
- 238000000034 method Methods 0.000 claims abstract description 49
- 239000002131 composite material Substances 0.000 claims description 34
- 239000000463 material Substances 0.000 claims description 30
- 230000007246 mechanism Effects 0.000 claims description 25
- 230000002093 peripheral effect Effects 0.000 claims description 20
- 238000001514 detection method Methods 0.000 claims description 12
- 238000012790 confirmation Methods 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 11
- 150000001875 compounds Chemical class 0.000 claims description 4
- 238000003698 laser cutting Methods 0.000 claims description 3
- 238000007730 finishing process Methods 0.000 abstract description 25
- 230000008569 process Effects 0.000 description 15
- 239000007789 gas Substances 0.000 description 11
- 238000003825 pressing Methods 0.000 description 7
- 238000005553 drilling Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
- B23C3/12—Trimming or finishing edges, e.g. deburring welded corners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K10/00—Welding or cutting by means of a plasma
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/08—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for flash removal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K7/00—Cutting, scarfing, or desurfacing by applying flames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
- B23K9/126—Controlling the spatial relationship between the work and the gas torch
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/04—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass for both machining and other metal-working operations
Definitions
- the present invention relates to a composite processing method, and more particularly to a composite processing method in which a hole is formed in an original plate by thermal cutting and machining, and a cutting member including the hole is cut out from the original plate.
- the present invention also relates to a combined processing apparatus for performing the combined processing method as described above.
- a welded structure that constitutes a main body frame such as a bridge, a construction machine, or an industrial machine can be obtained by cutting various shapes of cutting members from an original plate.
- thermal cutting such as plasma cutting, gas cutting, laser cutting or the like capable of cutting any shape by a program is used.
- Patent Document 1 discloses a combined machining equipped with a machining head that can be equipped with a cutting tool such as a drill or an end mill, in addition to a thermal cutting machining head equipped with a plasma torch, gas torch, laser head, and the like. The device is shown.
- thermal cutting such a multi-tasking machine is standardized to be processed by machining, such as high-precision holes that are difficult to handle by thermal cutting, or holes in the joints of steel structures for construction. It is used for processing holes that are open or welding grooves.
- Patent Document 2 discloses a composite processing apparatus having a punch processing head and a laser processing head.
- a pilot hole is formed in a plate material by a laser processing head, and thereafter, the formed pilot hole is finished by a punching head.
- JP 59-196115 A Japanese Patent Application Laid-Open No. 09-216021
- a complex machining apparatus for example, in order to perform machining such as cutting with high efficiency, a high output motor and a highly rigid frame for receiving a large machining reaction force are required.
- a clamping mechanism for fixing the original plate is provided on the mounting table. Therefore, the manufacturing cost of the apparatus becomes very expensive.
- the amount of cutting during machining is large.
- the gap (cutting height) between the plasma torch and the original plate is several millimeters, but a relatively large thread shape or Spiral chips are generated. This swarf is scattered on the original plate and becomes an obstacle to torch operation during thermal cutting.
- thread-like and spiral wire-like chips cannot be blown off with a gas or removed with a brush if they are caught in a heat-cutting groove.
- a combined processing machine that can perform both thermal cutting and machining can be applied to a relatively small original plate that can be easily clamped. It is not used in the field of cutting a large-sized cutting member from a large-size original plate (for example, a long original plate exceeding 6 m) used in construction machinery, industrial machinery, or the like.
- the original plate In the thermal cutting machine, the original plate is only placed on the mounting table, and the original plate is not fixed to the mounting table by the clamp mechanism. That is, in the thermal cutting operation, a horizontal mechanism is not applied to the original plate, and a clamp mechanism is not provided from the work entity of cutting a plurality of cutting members from a large original plate. In addition, in the original plate replacement work, a large original plate is replaced using a crane, and therefore, the position of the original plate on the mounting table is not so accurate, which is one of the reasons that the clamp mechanism is not provided.
- end mill processing and thermal cutting processing have different requirements in the working mode, and therefore, a combined processing machine of an end mill processing machine and a thermal cutting machine having no clamping mechanism has been put into practical use. Absent.
- An object of the present invention is to make it possible to perform thermal cutting and machining with a simple and inexpensive composite processing apparatus, particularly for large-size original plates.
- the composite processing method is a method of forming a hole in an original plate by thermal cutting and machining, and cutting a cutting member including the hole from the original plate, the hole cutting step, the finishing step, and the outer periphery Cutting step.
- the hole cutting step holes are formed in the original plate by thermal cutting while leaving a cutting allowance for the finished dimensions.
- the finishing process a cutting tool is inserted into the hole formed by the hole cutting process, and the cutting tool is circulated along the inner peripheral surface of the hole to cut the thermal cutting end surface, thereby processing the hole into a finished dimension.
- the outer periphery cutting step the outer periphery of the cutting member is cut by thermal cutting, and the cutting member is cut out from the original plate.
- each process of hole cutting ⁇ finishing is performed collectively, and then outer periphery cutting is performed collectively.
- the outer periphery cutting process must be performed after the finishing process. That is, the time when the finishing process is performed is before the outer periphery cutting, and each cutting member needs to be integrated with the original plate.
- the hole during the cutting process in the finishing process can be reduced by forming the hole by thermal cutting while leaving a small machining allowance.
- the rigidity of the frame can be reduced as compared with the prior art, and the motor for machining can be downsized.
- the cutting member including the hole portion to be finished is not separated from the original plate. For this reason, especially for large-size original plates, the original plate is held on the mounting table by the weight of the original plate, and by appropriately setting the diameter and cutting allowance of the cutting tool, the original plate due to processing reaction force without clamping Can be prevented.
- the composite processing method according to the second aspect of the present invention is the method of the first aspect, wherein the thermal cutting in the hole cutting step and the outer periphery cutting step is plasma cutting that generates a plasma arc on the surface side of the original plate, and the hole cutting step Then, thermal cutting is performed so that the machining allowance remains at the end of the hole on the surface side of the original plate.
- the diameter on the surface side of the original plate which is the side where the plasma arc is applied, tends to be larger than the diameter on the back side.
- thermal cutting is performed so that the cutting allowance remains at the end of the hole on the surface side of the original plate.
- the cutting amount in the finishing process can be greatly reduced by setting the target dimension on the hole surface side in the hole cutting process to the approximate finishing dimension.
- the composite processing method according to the third aspect of the present invention is the method of the first aspect, wherein the thermal cutting in the hole cutting step and the outer periphery cutting step is laser cutting in which laser is irradiated from the surface of the original plate or gas cutting in which gas is injected. Yes, in the hole cutting process, thermal cutting is performed so that a cutting allowance remains at the end of the hole on the back side of the original plate.
- the diameter on the surface side of the original plate of the hole on the laser irradiation side or gas injection side tends to be smaller than the diameter on the back side, contrary to plasma cutting.
- thermal cutting is performed so that the cutting allowance remains at the end of the hole on the back side of the original plate.
- the amount of cutting in the finishing process can be greatly reduced by setting the target dimension on the back side of the hole in the hole cutting process to the approximate finishing dimension.
- processing is performed without clamping the original plate from the hole cutting step to the outer periphery cutting step.
- the thermally cut end face of the hole is cut using a rotating cutting tool.
- the cutting tool diameter is not more than twice the thickness of the original plate.
- the plate thickness and the diameter of the cutting tool are related to each other.
- the lower limit of the cutting tool diameter is regulated by the mounting shaft diameter. Further, the attachment shaft diameter is determined by the strength with which the attached cutting tool functions as a tool. Therefore, it goes without saying that the cutting tool diameter is equal to or larger than the diameter having the strength to function as a tool.
- the diameter of the cutting tool is set to not more than twice the thickness of the original plate. In addition, it is more preferable if the cutting tool diameter is set to 1 time or less of the original plate thickness.
- the composite processing method according to the sixth aspect of the present invention further includes a measuring step of measuring the height position of the hole as a pre-process of the finishing step in any of the methods of the first to fifth aspects.
- the height position of the cutting tool is controlled from the measurement result in the measurement process and the plate thickness data of the original plate.
- the height of the original plate placed on the mounting table is not uniform due to the dross attached to the table rail and the deflection of the original plate. Also, because the table rail is a consumable item, the height of the top surface of the rail may vary by several millimeters.
- the height position of the hole is measured before the finishing process, and the height position of the cutting tool is controlled based on the measurement result. For this reason, only the inner peripheral surface of the hole can be cut accurately.
- the height position of the hole can be easily measured by measuring the surface height of the original plate near the hole.
- the composite processing method according to the seventh aspect of the present invention is the method according to any one of the first to sixth aspects, wherein the end material thermally cut in the hole cutting step is in the hole between the hole cutting step and the finishing step. It further includes a confirmation step for confirming whether or not it remains.
- the end material inside the hole usually falls downward from the gap between the table bars.
- the hole cutting is performed so as to straddle the crosspiece, the end material may remain on the crosspiece, or the end material may remain in the hole due to being caught on the inner peripheral surface of the hole. In such a situation, the tool for cutting cannot be inserted into the hole in the finishing process.
- the method according to the seventh aspect it is confirmed whether or not the end material remains in the cut hole.
- the finishing process is not executed, or the finishing process is executed after the end material is taken out.
- the confirmation step is performed by inserting a cutting tool used in the finishing step into the hole.
- the cut end surface of the hole formed by the hole cutting step is cut by an end mill.
- the rotating cutting tool is driven by an air motor in the finishing step.
- the composite processing apparatus is an apparatus for forming a hole in an original plate by thermal cutting and machining, and cutting a cutting member including the hole from the original plate, and a mounting table on which the original plate is placed;
- a first head for thermally cutting an unclamped original plate on the mounting table;
- a second head for machining the unclamped original plate on the mounting table;
- a moving mechanism for moving the second head relative to the mounting table in a horizontal direction and a vertical direction, a height position detection sensor for detecting a vertical position of the original plate mounted on the mounting table, and a first And a controller that controls relative movement of the second head with respect to the mounting table and thermal cutting and machining by the first and second heads.
- the control unit includes a hole cutting function unit, a finishing function unit, and an outer periphery cutting function unit.
- the hole cutting function part forms a hole in the original plate by thermal cutting while leaving a cutting allowance for the finished dimension.
- the second function part inserts a cutting tool into the hole formed by the hole cutting function part, cuts the thermal cutting end face by rotating the cutting tool along the inner peripheral surface of the hole, and processes the hole into a finished dimension.
- An outer periphery cutting function part cut disconnects the outer periphery of a cutting member by thermal cutting, and cuts out a cutting member from an original plate.
- the load during cutting can be reduced in finishing the inner peripheral surface of the hole by forming the hole by thermal cutting while leaving a small machining allowance. For this reason, it is possible to reduce the rigidity of the apparatus frame as compared with the prior art and to reduce the size of the motor for machining. In addition, a clamping mechanism for pressing the original plate becomes unnecessary.
- the composite machining apparatus is the apparatus according to the eleventh aspect, wherein the second head has a cutting tool having a diameter not more than twice the thickness of the original plate.
- the smaller the tool diameter the smaller the reaction force acting on the spindle and original plate on which the tool is mounted. For this reason, the vibration etc. at the time of machining can be suppressed more by making the diameter of the cutting tool not more than twice the thickness of the original plate.
- the cutting tool diameter is set to 1 time or less of the original plate thickness.
- the combined machining apparatus is the apparatus according to the eleventh or twelfth aspect, wherein the control unit further includes a confirmation function unit for confirming whether or not the thermally cut end material remains in the hole. .
- control unit confirms the presence or absence of the end material by inserting the cutting tool attached to the second head into the hole.
- the composite machining apparatus according to the fifteenth aspect of the present invention is the apparatus of the eleventh to fourteenth aspects, in which an end mill is attached to the second head.
- the second head has an air motor for driving the cutting tool.
- FIG. 1 is an external configuration diagram of a combined machining apparatus according to an embodiment of the present invention.
- Sectional drawing which shows an example in the case of processing in an axial direction in multiple times in a finishing process.
- FIG. 1 shows an overall configuration of a combined machining apparatus 1 according to an embodiment of the present invention.
- FIG. 2 shows a schematic front view of the combined machining apparatus 1.
- the composite processing apparatus 1 includes a mounting table 2 on which a steel plate W0 as an original plate is mounted, a plasma torch (first head) 3 for thermal cutting, a head (second head) 4 for machining, A height detection sensor 5 and a controller 6 are provided.
- a plurality of crosspieces 7 are arranged on the upper surface of the mounting table 2, and the processed end materials and the like fall downward from the gaps between the crosspieces 7. Moreover, the space below the mounting table 2 is connected to a dust collector (not shown).
- An X-axis rail 10 is arranged on the side of the mounting table 2.
- An X-axis carriage 11 is supported on the X-axis rail 10 so as to be movable in the X-axis direction.
- a Y-axis arm 12 extending in the Y-axis direction orthogonal to the X-axis direction is fixed to the X-axis carriage 11.
- the Y-axis arm 12 is located above the mounting table 2.
- a Y-axis carriage 13 is supported by the Y-axis arm 12 so as to be movable in the Y-axis direction.
- the X-axis carriage 11 and the Y-axis carriage 13 are driven by an X-axis motor Mx and a Y-axis motor My shown in FIG. 3, respectively.
- the plasma torch 3 is mounted on a Z-axis carriage 15 supported by the Y-axis carriage 13 so as to be movable in the Z-axis direction (vertical direction).
- the plasma torch 3 has a substantially cylindrical shape with a tapered tip, and is connected to a plasma power supply unit 17 (see FIG. 3) via a torch cable or the like.
- a first Z-axis motor Mz1 shown in FIG. 3 is provided to drive the plasma torch 3 in the vertical direction.
- the machining head 4 has a second Z-axis motor Mz2 shown in FIG. 3, a main shaft 18 movable in the Z-axis direction, and the like, and an end mill 19 is attached to the tip of the main shaft 18.
- a roughing roughing end mill is used which has a small reaction force during cutting and the original plate W0 is difficult to move during cutting.
- the diameter of the end mill 19 is preferably not more than twice the plate thickness of the original plate W0, but more preferably not more than one time the plate thickness of the original plate W0.
- an air motor is used as the second Z-axis motor Mz2.
- an electric motor if the machining allowance is large and the load torque is large, if there is a margin in the motor capacity, the machining is performed without reducing the rotational speed. Then, in the case of the present invention, since the original plate W0 is cut without being clamped, the original plate W0 may move.
- the height detection sensor 5 is supported by the Y-axis carriage 11 and is movable in the Z-axis direction. Note that a mechanism for driving the height detection sensor 5 in the vertical direction is omitted.
- the plasma torch 3 and the machining head 4 are horizontally (X and Y axis directions) and vertically (Z axis direction) with respect to the original plate W0 placed on the placement table 2. It is possible to move to any position. That is, the plasma torch 3 and the machining head 4 are moved in each direction by the motors Mx, My, Mz1, and Mz2 for driving the X-axis carriage 11, the Y-axis carriage 13, the Z-axis carriage 15, and the main shaft 18, respectively.
- a moving mechanism is configured.
- the plasma torch 3 and the machining head 4 may be moved in the Z-axis direction by one Z-axis direction driving motor and one air cylinder.
- the controller 6 includes a hole cutting function unit 21, a finishing function unit 22, an outer periphery cutting function unit 23, a confirmation function unit 24, and a processing line data acquisition unit 25.
- the hole cutting function unit 21, the finishing function unit 22, the outer periphery cutting function unit 23, and the confirmation function unit 24 are configured by a program.
- the hole cutting function unit 21 has a function of forming a hole in the original plate by plasma cutting while leaving a machining allowance for the finished dimensions.
- the finishing function unit 22 inserts the end mill 19 into the hole formed by the hole cutting function unit 21, and cuts the thermal cutting end surface by rotating the end mill 19 along the inner peripheral surface of the hole, so that the hole has a finished dimension.
- the outer periphery cutting function unit 23 has a function of forming a cutting groove along the outer periphery of the cutting member by plasma cutting and cutting the cutting member from the original plate W0.
- the confirmation function unit 24 has a function of confirming whether or not the end material plasma-cut by the hole cutting function unit 21 remains in the hole.
- the automatic program device 26 is connected to the controller 6.
- the automatic program device 26 is a device for programming processing line data in accordance with the shape of the cutting member.
- the machining data programmed by the automatic program device 26 is transmitted to the machining line data acquisition unit 25 of the controller 6.
- controller 6 is connected to the height detection sensor 5 and motors Mx, My, Mz1, Mz2 for driving the movable carriages 11, 13, 15 and the main shaft 18 in the respective axial directions. Further, a plasma power supply unit 17 is connected to the controller 6 so that the generation of the plasma arc is controlled.
- FIG. 4 shows the procedure of the processing method
- FIGS. 5A and 5B show the arrangement of each part in each step.
- each process of hole cutting ⁇ finishing is performed collectively, and then outer periphery cutting is performed collectively.
- the outer periphery cutting process must be performed after the finishing process. That is, at the time when the finishing process is performed, it is necessary that each cutting member is integrated with the original plate, before the outer periphery is cut.
- step S1 the plasma torch 3 is activated to cut a hole in the original plate W0 (see FIG. 5A (a)).
- the formed hole has an inverted truncated cone shape as shown in FIG. 6 due to the characteristics of plasma cutting. That is, the hole diameter d1 on the front surface side of the original plate to which the plasma arc hits is larger than the hole diameter d2 on the back surface side.
- the hole diameter d1 on the surface side of the original plate formed by the hole cutting is set so as to be an approximate finish dimension. That is, in the subsequent cutting process, the target dimension in the hole cutting is set so that there is a cutting allowance on the surface side of the original plate and the cutting allowance is minimized.
- a portion to be deleted in the cutting process is indicated by hatching.
- step S2 the height position of the surface of the original plate W0 is measured. Specifically, the measurement is performed by one of the following two methods.
- the tip of the end mill 19 is brought into contact with the surface of the original plate W0, and the height (tip position) of the end mill 19 in this state is detected (see FIG. 5A (b)).
- the height position of the surface of the original plate W0 is obtained from the data obtained by this processing and the plate thickness data of the original plate W0 ascertained in advance.
- the end mill 19 is brought into contact with the original plate W0, and the surface position of the original plate W0 is detected by means such as the reaction force or electrical conduction, so that no special sensor is required. There is an advantage that the structure becomes simple.
- providing a sensor dedicated to height detection has advantages that the detection speed is increased and the detection accuracy is increased.
- the end mill 19 is lowered from the detected position by the thickness from the detected thickness value and the tip position of the end mill 19.
- the tip end of the end mill 19 and the back surface position of the original plate W0 coincide.
- the lowering amount of the end mill 19 is set to the plate thickness of the original plate W0 + ⁇ .
- “ ⁇ ” is set to a value that does not cut the crosspieces or the dross of the mounting table and that does not leave any remaining on the inner peripheral surface of the hole.
- a jig and a workpiece are placed on a surface plate and processed.
- the height position of the surface of the surface plate is previously grasped by the controller. Accordingly, in the processing machine having only the machining head, the measurement of the position of the surface height of the original plate and the calculation of the descending amount as described above are unnecessary.
- the thickness of the original plate W0 and the height position of the crosspiece 7 of the mounting table 2 are previously grasped by the controller 6 as data. Therefore, it is also possible to perform a subsequent cutting process based on the data without measuring the surface of the original plate W0.
- the height of the original plate W0 placed on the mounting table 2 is the same as that of the dross D or the original plate W0 attached to the crosspiece 7 of the table 2. Not uniform due to deflection. Further, because the crosspiece 7 of the table 2 is a consumable item, the height of the top surface of the crosspiece 7 also varies about several mm.
- step S2 the actual height of the original plate W0, in particular, the height of the original plate W0 in the vicinity of the formed hole is measured, and the movement of the end mill 19 in the subsequent process is controlled based on the measurement result.
- Such processing is indispensable in the multi-task machine that is the subject of the present invention.
- step S3 it is confirmed whether or not any end material remains inside the hole formed in step S1. That is, when the hole is cut in step S ⁇ b> 1, the end material inside the hole usually falls downward from the gap of the cross 7 of the mounting table 2. However, depending on the case, the end material may be caught by the end face of the hole and remain inside the hole.
- this step S3 it is confirmed whether or not the end material remains in the hole. Specifically, a process of inserting the end mill 19 into the hole is executed. As shown in FIG. 5B (a), when the end material remains in the hole, the tip of the end mill 19 collides with the end material and does not descend. By detecting the position of the end mill 19, it is possible to detect the presence or absence of the end material inside the hole.
- step S4 the processing is once stopped. Then, the operator is notified by turning on a warning lamp or the like. The operator removes the offcuts and commands to resume the processing.
- step S5 cutting (finishing) by the end mill 19 is performed. Specifically, the end mill 19 cuts the inner peripheral end face of the hole indicated by the oblique lines in FIG. 6 (see FIG. 5B (b)).
- FIG. 8 shows a plan view when the end mill 19 cuts the thermally cut end face Hf of the hole H.
- FIG. 8 shows a plan view when the end mill 19 cuts the thermally cut end face Hf of the hole H.
- FIG. 8 shows a plan view when the end mill 19 cuts the thermally cut end face Hf of the hole H.
- FIG. 8 shows a plan view when the end mill 19 cuts the thermally cut end face Hf of the hole H.
- FIG. 8 shows a plan view when the end mill 19 cuts the thermally cut end face Hf of the hole H.
- FIG. 8 shows a plan view when the end mill 19 cuts the thermally cut end face Hf of the hole H.
- Up-cutting is a method of sharpening by hitting a portion of the tool that has been cut.
- the down cut is a cutting method in which the blade of the tool hits an uncut portion and cuts down.
- the height position of the original plate W0 may be changed.
- the end mill 19 can be accurately lowered to the same position as the back surface of the original plate W0 by the process of the previous step S2. Therefore, the entire region of the inner peripheral end face of the hole can be cut reliably. For the same reason, it is possible to prevent the end mill 19 from cutting the dross D or the crosspiece 7.
- the crosspiece 7 may be worn and the height position of the original plate W0 may be lowered downward.
- the end position of the end mill 19 does not reach the back surface of the original plate W0, and the uncut portion can be left.
- such a problem can be prevented by the process of the previous step S2.
- step S6 the plasma torch 3 is moved along the outer periphery of the cutting member to cut the outer periphery of the cutting member. Thereby, the cutting member in which the hole was formed can be cut out from the original plate W0.
- the load during cutting in the finishing step can be reduced by forming the hole by plasma cutting while leaving a small machining allowance. For this reason, the vibration at the time of cutting can be reduced, the rigidity of the frame can be lowered, and the motor for driving the end mill can be reduced in size. Further, the processing reaction force at the time of processing becomes small, and a clamping mechanism for pressing the original plate becomes unnecessary.
- the tool used for finishing is not limited to an end mill. Other cutting tools such as a grinder may be used.
- the hole shape to be processed is not limited to a perfect circle shape.
- the present invention can be similarly applied to the case of forming a hole such as a long hole or a rectangle.
- the first Z-axis motor Mz1 for driving the plasma torch 3 and the second Z-axis motor Mz2 for driving the machining head 4 are provided.
- the mechanism for moving is not limited to the above embodiment.
- the plasma torch 3 and the machining head 4 are supported by a carriage movable in the Z-axis direction, and the carriage is driven in the Z-axis direction by one motor, and either the plasma torch 3 or the machining head 4 is driven. May be driven in the Z-axis direction by an air cylinder.
- the plasma torch 3 is driven by an air cylinder because the plasma torch 3 is less susceptible to reaction force during processing than the machining head 4.
- the diameter on the surface side of the original plate of the hole on the laser irradiation side or gas injection side tends to be smaller than the diameter on the back side, contrary to plasma cutting.
- the cutting amount in a finishing process can be made very small by making the aim dimension of the hole back surface side in a hole cutting process into a rough finishing dimension.
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Abstract
Description
図1に本発明の一実施形態による複合加工装置1の全体構成を示す。また、図2に複合加工装置1の正面概略図を示す。
以上の複合加工装置1によって実行される加工方法を、図4、図5A及び図5Bを用いて説明する。図4は加工方法の手順を示しており、図5A及び図5Bは各工程における各部の配置を示している。
(1)穴切断工程において、少ない削り代を残してプラズマ切断により穴を形成することによって、仕上げ工程における切削加工時の負荷を小さくすることができる。このため、切削加工時の振動を小さくでき、フレームの剛性を低くすることができるとともに、エンドミルを駆動するためのモータを小型化できる。また、加工時における加工反力が小さくなり、原板を押さえ付けるためのクランプ機構が不要になる。
本発明は以上のような実施形態に限定されるものではなく、本発明の範囲を逸脱することなく種々の変形又は修正が可能である。
2 載置テーブル
3 プラズマトーチ
4 機械加工ヘッド
5 高さ検出センサ
6 コントローラ
10 X軸レール
11 X軸台車
12 Y軸アーム
13 Y軸台車
15 Z軸台車
21 穴切断機能部
22 仕上げ機能部
23 外周切断機能部
24 確認機能部
Claims (16)
- 熱切断及び機械加工によって原板に穴を形成し、前記穴を含む切断部材を前記原板から切り出す複合加工方法であって、
仕上げ寸法に対して削り代を残して熱切断により原板に穴を形成する穴切断工程と、
前記穴切断工程によって形成された穴に切削工具を挿入し、前記穴の内周面に沿って前記切削工具を周回させることで熱切断端面を切削し、前記穴を仕上げ寸法に加工する仕上げ工程と、
熱切断によって前記切断部材の外周を切断し、前記原板より前記切断部材を切り出す外周切断工程と、
を含む複合加工方法。 - 前記穴切断工程及び前記外周切断工程における熱切断は、原板の表面側にプラズマアークを発生させるプラズマ切断であり、
前記穴切断工程では、前記穴の原板表面側端部に削り代が残るように熱切断を行う、
請求項1に記載の複合加工方法。 - 前記穴切断工程及び前記外周切断工程における熱切断は、原板の表面からレーザを照射するレーザ切断又はガスを噴射するガス切断であり、
前記穴切断工程では、前記穴の原板裏面側端部に削り代が残るように熱切断を行う、
請求項1に記載の複合加工方法。 - 前記穴切断工程から前記外周切断工程では、前記原板をクランプすることなく加工を行う、請求項1から3のいずれかに記載の複合加工方法。
- 前記仕上げ工程では、回転する切削工具を用いて穴の熱切断端面を切削し、
前記切削工具径は前記原板の厚みの2倍以下である、
請求項1から4のいずれかに記載の複合加工方法。 - 前記仕上げ工程の前工程として、前記穴の高さ位置を計測する計測工程をさらに含み、
前記仕上げ工程では、前記計測工程での計測結果及び原板の板厚データから切削工具の高さ位置を制御する、
請求項1から5のいずれかに記載の複合加工方法。 - 前記穴切断工程と前記仕上げ工程との間に、前記穴切断工程で熱切断された端材が穴内に残っているか否かを確認する確認工程をさらに含む、請求項1から6のいずれかに記載の複合加工方法。
- 前記確認工程は、前記仕上げ工程で用いる切削工具を前記穴に挿入することにより行う、請求項7に記載の複合加工方法。
- 前記仕上げ工程では、前記穴切断工程によって形成された穴の熱切断端面をエンドミルにより切削する、請求項1から8のいずれかに記載の複合加工方法。
- 前記仕上げ工程では、回転する切削工具をエアモータにより駆動する、請求項1から9のいずれかに記載の複合加工方法。
- 熱切断及び機械加工によって原板に穴を形成し、前記穴を含む切断部材を前記原板から切り出す複合加工装置であって、
原板が載置される載置テーブルと、
前記載置テーブル上に載置された原板に対して熱切断するための第1ヘッドと、
前記載置テーブル上に載置された原板に対して機械加工するための第2ヘッドと、
前記第1及び第2ヘッドを前記載置テーブルに対して相対的に水平方向及び上下方向に移動する移動機構と、
前記載置テーブルに載置された原板の上下方向位置を検出する高さ位置検出センサと、
前記第1及び第2ヘッドの前記載置テーブルに対する相対移動、及び前記第1及び第2ヘッドによる熱切断及び機械加工を制御する制御部と、
を備え、
前記制御部は、
仕上げ寸法に対して削り代を残して熱切断により原板に穴を形成する穴切断機能部と、
前記穴切断機能部によって形成された穴に切削工具を挿入し、前記穴の内周面に沿って前記切削工具を周回させることで熱切断端面を切削し、前記穴を仕上げ寸法に加工する仕上げ機能部と、
熱切断によって前記切断部材の外周を切断し、前記原板より前記切断部材を切り出す外周切断機能部と、
を有する、
複合加工装置。 - 前記第2ヘッドは原板の厚みの2倍以下の径を有する切削工具を有している、請求項11に記載の複合加工装置。
- 前記制御部は、熱切断された端材が穴内に残っているか否かを確認する確認機能部をさらに有する、請求項11又は12に記載の複合加工装置。
- 前記制御部は、前記第2ヘッドに装着された切削工具を前記穴に挿入することにより端材の有無を確認する、請求項13に記載の複合加工装置。
- 前記第2ヘッドにはエンドミルが装着される、請求項11から14のいずれかに記載の複合加工装置。
- 前記第2ヘッドは前記切削工具を駆動するためのエアモータを有している、請求項11から15のいずれかに記載の複合加工装置。
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