WO2011118594A1 - シリンダヘッドのバルブ孔の加工方法及び加工装置、および、クランプ装置 - Google Patents
シリンダヘッドのバルブ孔の加工方法及び加工装置、および、クランプ装置 Download PDFInfo
- Publication number
- WO2011118594A1 WO2011118594A1 PCT/JP2011/056863 JP2011056863W WO2011118594A1 WO 2011118594 A1 WO2011118594 A1 WO 2011118594A1 JP 2011056863 W JP2011056863 W JP 2011056863W WO 2011118594 A1 WO2011118594 A1 WO 2011118594A1
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- WIPO (PCT)
- Prior art keywords
- cylinder head
- tool
- valve holes
- machining
- pair
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B39/00—General-purpose boring or drilling machines or devices; Sets of boring and/or drilling machines
- B23B39/16—Drilling machines with a plurality of working-spindles; Drilling automatons
- B23B39/20—Setting work or tool carrier along a circular index line; Turret head drilling machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
- B23B41/12—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor for forming working surfaces of cylinders, of bearings, e.g. in heads of driving rods, or of other engine parts
-
- 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
- B23C3/02—Milling surfaces of revolution
- B23C3/05—Finishing valves or valve seats
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q39/00—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation
- B23Q39/02—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station
- B23Q39/028—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation the sub-assemblies being capable of being brought to act at a single operating station with a plurality of workholder per toolhead in operating position
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2215/00—Details of workpieces
- B23B2215/24—Components of internal combustion engines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q39/00—Metal-working machines incorporating a plurality of sub-assemblies, each capable of performing a metal-working operation
- B23Q2039/006—Machines with multi-spindles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/4927—Cylinder, cylinder head or engine valve sleeve making
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/03—Processes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/36—Machine including plural tools
- Y10T408/38—Plural, simultaneously operational tools
- Y10T408/3806—Plural, simultaneously operational tools with plural simultaneously operational work stations
- Y10T408/3809—Successively acting on workpiece
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/36—Machine including plural tools
- Y10T408/385—Rotatable about parallel axes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/55—Cutting by use of rotating axially moving tool with work-engaging structure other than Tool or tool-support
- Y10T408/561—Having tool-opposing, work-engaging surface
- Y10T408/5614—Angularly adjustable surface
Definitions
- the present invention relates to a machining method and a machining apparatus for machining a valve hole in a cylinder head of an internal combustion engine.
- the present invention also relates to a clamping device that holds a workpiece during processing.
- a workpiece such as a cylinder head constituting an engine is provided with a plurality of valve holes for attaching an intake valve and an exhaust valve in one cylinder (see, for example, Patent Document 1).
- a workpiece such as a cylinder head constituting an engine is provided with a plurality of valve holes for attaching an intake valve and an exhaust valve in one cylinder (see, for example, Patent Document 1).
- gang head multi-axis head
- a plurality of intake valve holes and a plurality of exhaust valve holes formed in one cylinder are close to each other, it is difficult to process at a time with a single multi-axis head.
- a plurality of multi-axis heads for intake valve holes and multi-axis heads for exhaust valve holes are provided, and the valve holes are formed using the multi-axis head that matches the position of the valve hole to be processed.
- the number of multi-axis heads increases and the work becomes complicated and the number of machining steps increases.
- a clamping device that grips the cylinder head with respect to the machine tool is used.
- Embodiments of the present invention provide a cylinder head valve hole processing method and a processing apparatus capable of processing a plurality of valve holes with less man-hours.
- the embodiment of the present invention provides a clamping device that can change the shift amount of the workpiece with a simple configuration.
- the plurality of valve holes 34, 35 of the cylinder head 3 of the internal combustion engine use the first tool 26 and the second tool 28, and one of the pair of first valve holes 34.
- 34 is processed with the first tool 26, the cylinder head 3 is moved with respect to the first tool 26, and then the other 34 of the pair of first valve holes 34 is processed with the first tool 26; After machining one 35 of the pair of second valve holes 35 with the second tool 28 and moving the cylinder head 3 relative to the second tool 28, the other 35 of the pair of second valve holes 35 is moved.
- the valve hole processing apparatus 1 for processing a plurality of intake valve holes and exhaust valve holes with respect to the cylinder head of the internal combustion engine includes two cylinder heads 3 and 3. Two main body portions 15A and 15B to be fixed, a first tool 26 that is disposed to face the main body portions 15A and 15B, and that processes the intake valve hole 34 of one cylinder head 3, and the other cylinder head 3 A multi-axis tool 22, and moving devices 59 ⁇ / b> A and 59 ⁇ / b> B that individually move the cylinder heads 3 with respect to the multi-axis tool 22. May be.
- the clamping device 9 includes the main body portions 52A and 52B that can rotate around the rotation shafts 41A1 and 41B1, and the rotation units 41A and 41B that adjust the rotation positions of the main body portions 52A and 52B. And stopper portions 61A and 61B fixed to one end portion in the axial direction of the main body portions 52A and 52B, biasing devices 59A and 59B for pressing the main body portions 52A and 52B to one of the axial directions, and the main body portions 52A and 52B Index plates 63A and 63B with which the stopper portions 61A and 61B abut when pressed against one of the directions may be provided.
- the index plates 63A and 63B may have a plurality of plate portions 70a to 70j having different thicknesses.
- the plurality of plate portions 70a to 70j may be arranged on the same circumference.
- FIG. 1 is a schematic configuration diagram of a valve hole machining apparatus for machining a valve hole in a cylinder head according to an exemplary embodiment.
- reference numeral 1 denotes a valve hole machining apparatus.
- the valve hole machining apparatus 1 is conveyed by a conveyance conveyor 7 that conveys a pallet 5 on which a cylinder head (workpiece) 3 is placed, and the conveyance conveyor 7.
- a clamping device 9 that fixes the cylinder head 3 together with the pallet 5 and a machine tool 13 that is disposed to face the clamping device 9 and includes a plurality of tools for machining valve holes in the cylinder head 3 are provided.
- the clamp device 9 is disposed between the transport conveyor 7 and the machine tool 13 and includes a pair of right and left jig bodies (main body portions) 15A and 15B to which the cylinder head 3 is fixed together with the pallet 5.
- Each of the jig bodies 15A and 15B is configured to be rotatable around a rotation axis extending in the vertical direction. After the jig bodies 15A and 15B are directed toward the conveyor 7 and the cylinder head 3 is attached from the conveyor 7 side. The cylinder head 3 can be directed to the machine tool 13 side.
- the cylinder head 3 and the pallet 5 are attached to and detached from the conveyor 7 and the jig bodies 15A and 15B by a loader (supply device) (not shown).
- FIG. 2A is a plan view showing an inner surface of the cylinder head 3, and FIG. 2B is a cross-sectional view showing an intake port, an exhaust port, and each valve hole provided in the cylinder head 3.
- the cylinder head 3 constitutes an in-line 4-cylinder 16-valve engine, and intake ports 32a to 32h corresponding to the combustion chambers (cylinders) 31a to 31d. Exhaust ports 33a to 33h are provided.
- the intake ports 32a to 32h are formed with intake valve holes 34 (34a to 34h) to which intake valves (not shown) for opening and closing the intake ports 32a to 32h are attached, and exhaust ports 33a to 33h.
- exhaust valve holes 35 35a to 35h
- the pitch P1 between the two intake valve holes 34a, 34b provided in one combustion chamber 31a is formed to be the same as the pitch between the intake valve holes in the other combustion chambers 31b-31d.
- the pitch P2 between the two exhaust valve holes 35a and 35b provided in one combustion chamber 31a is formed to be the same as the pitch between the exhaust valve holes in the other combustion chambers 31b to 31d.
- an intake valve hole 34a and an exhaust valve hole 35a are formed at positions offset by a predetermined offset amount L in the height direction, and this relationship is related to the other combustion chambers 31b to 31b. The same applies to 31d.
- intake valve holes and exhaust valve holes formed at the same positions in the combustion chambers 31a to 31d are formed at the same pitch P3.
- an intake valve hole 34a and an exhaust valve hole 35a are provided with a predetermined inclination angle ⁇ . For this reason, when machining the valve hole in the cylinder head 3, as shown in FIG. 1, the jig bodies 15A and 15B to which the cylinder head 3 is fixed are rotated and held at predetermined angles, respectively. Is moved toward the jig bodies 15A and 15B, so that the tool processes each valve hole.
- FIG. 3 is a schematic diagram showing the appearance of the machine tool 13.
- the machine tool 13 includes a base 21 and a multi-axis tool 22 that is disposed on the base 21 so as to freely advance and retract in the horizontal direction (arrow A direction).
- the multi-axis tool 22 includes a multi-axis head 24 to which a plurality of tools can be attached and a drive unit 25 for driving the multi-axis head 24, and is disposed on a guide rail 23 provided on the upper portion of the base 21. Yes.
- a conveying mechanism such as a ball screw means is provided between the multi-axis tool 22 and the base 21, and the ball screw means is driven by a conveying motor (not shown) so that the ball
- the multi-axis tool 22 engaged with the screw means slides back and forth on the guide rail 23.
- intake side tool holders 27a to 27d to which intake side tools 26 (26a to 26d) for processing intake valve holes 34 (34a to 34h) are attached, and exhaust valve holes 35 (35a) are mounted.
- ⁇ 35h) are integrally provided with exhaust side tool holders 29a to 29d to which exhaust side tools 28 (28a to 28d) are attached.
- the intake side tool holders 27a to 27d and the exhaust side tool holders 29a to 29d are arranged along the vertical direction, and the pitch P3 between the intake side tool holders 27a to 27d and between the exhaust side tool holders 29a to 29d. Are formed to be the same as the pitch P3 of the intake valve holes and the exhaust valve holes formed at the same positions in the combustion chambers 31a to 31d.
- the axial centers of the intake side tool 26a and the exhaust side tool 28a attached to the intake side tool holder 27a and the exhaust side tool holder 29a are offset by the above-described offset amount L in the vertical direction.
- the intake side tool holes 27a to 27d and the intake side tool holders 27a to 27d are provided to constitute an intake side valve hole multi-axis tool, and the exhaust side tools 28a to 28d and the exhaust side tool holders 29a to 29d are provided.
- a multi-axis tool for exhaust side valve holes is provided.
- FIG. 4 is a schematic view showing an external appearance of the clamp device 9, and FIG. 5 is a side sectional view of the clamp device 9.
- the clamp device 9 includes a device main body 40 constituting a frame, jig bodies 15A and 15B rotatably provided on the device main body 40, and the jig bodies 15A and 15B and the jig body 15A. , 15B and drive motors (rotary units) 41A, 41B for adjusting the rotational position.
- a device main body 40 constituting a frame
- jig bodies 15A and 15B rotatably provided on the device main body 40
- 15B and drive motors (rotary units) 41A, 41B for adjusting the rotational position.
- these drive motors 41A and 41B are housed in housings 42A and 42B and fixed to the apparatus main body 40, and an encoder (not shown) for detecting the rotational positions of the jig bodies 15A and 15B is provided. ing.
- the description of the housings 42A and 42B is omitted, and the drive motors 41A and 41B are exposed.
- the apparatus main body 40 includes a base 43, a pair of left and right column members 44 ⁇ / b> A and 44 ⁇ / b> B extending upward from the base 43, and an upper frame member that connects the upper portions of the column members 44 ⁇ / b> A and 44 ⁇ / b> B.
- substantially cylindrical table bases 43A and 43B are provided below the drive motors 41A and 41B, respectively, and jig bodies 15A connected to the drive motors 41A and 41B are provided on the table bases 43A and 43B. 15B is rotatably mounted.
- the jig bodies 15A and 15B have substantially the same configuration, only one jig body 15A will be described, and the other jig body 15B will be denoted by the same reference numerals and description thereof will be omitted.
- the jig body 15A includes an upper member 50A1 connected to the rotation shaft 41A1 of the drive motor 41A, a lower member 50A2 rotatably mounted on the table base 43A, and the upper member 50A1 and the lower member 50A1.
- a frame portion 51A that is integrally provided with a connecting member 50A3 to be connected to the member 50A2 and is formed in a U-shaped cross section, and a shift table (main body portion) 52A that can be raised and lowered with respect to the frame portion 51A.
- the upper member 50A1 extends below the upper frame member 45 of the apparatus main body 40 and is connected to a rotation shaft 41A1 of a drive motor 41A that passes through the upper frame member 45.
- a bearing (not shown) is disposed between the lower member 50A2 and the table base 43A of the apparatus main body 40 so as to be rotatable.
- the frame portion 51 ⁇ / b> A (the jig body 15 ⁇ / b> A) rotates integrally with the apparatus main body 40 in accordance with the rotation of the drive motor 41 ⁇ / b> A.
- the drive motor 41A includes an encoder, the amount of rotation (rotation angle) from the reference position (position facing the machine tool) of the jig body 15A is calculated by this encoder.
- engaging members 53A and 54A that engage with the upper and lower ends of the pallet 5 disposed on the jig body 15A are provided on the upper and lower portions of the shift table 52A, respectively.
- the engaging members 53A and 54A are each formed in a substantially U-shaped cross section in which the lower surface of the engaging member 53A and the upper surface of the engaging member 54A are opened, and the pallet 5 is attached between the engaging members 53A and 54A.
- a pair of pallet clamp cylinders 55A and 55A are provided at the upper end of the shift table 52A so as to expand and contract in the thickness direction of the shift table 52A.
- the tip of the pallet clamp cylinder 55A extends downward and enters the engagement member 53A through a notch provided in the engagement member 53A.
- a pair of pallet clamp cylinders 56A and 56A are provided at the lower end of the shift table 52A so as to expand and contract in the thickness direction of the shift table 52A.
- the tip of the pallet clamp cylinder 56A extends upward and enters the engagement member 54A through a notch provided in the engagement member 54A.
- pallet positioning cylinders 57A and 58A are provided that extend through the shift table 52A and extend in the thickness direction of the shift table 52A.
- the pallet positioning cylinder 57A is provided below the engagement member 53A and substantially at the center of the pallet clamp cylinders 55A and 55A.
- the pallet positioning cylinder 58A is provided above the engagement member 54A and at the approximate center of the pallet clamp cylinders 56A, 56A.
- the pallet clamp cylinders 55A and 55A and the pallet positioning cylinder 57A grip the upper end of the pallet 5 disposed between the engaging members 53A and 54A, and the pallet clamp cylinders 56A, The lower end portion of the pallet 5 is gripped by 56A and the pallet positioning cylinder 58A, and the pallet clamp cylinders 55A and 56A and the pallet positioning cylinders 57A and 58A constitute a gripping portion.
- the shift table 52A is attached to the frame portion 51A so as to be movable up and down.
- the shift table 52A to which the cylinder head 3 is fixed can be moved up and down with respect to the machine tool 13, for example, the exhaust side tools 28a to 28d provided on the multi-axis head 24 of the machine tool 13 are used to After processing the exhaust valve holes 35a, 35c, 35e, and 35g on the upper side of the combustion chamber, the shift table 52A is raised by the pitch P2 described above, whereby the exhaust valve holes 35b, 35d, 35f and 35h can be processed. As shown in FIG.
- a hydraulic cylinder (biasing device, moving device) 59A that expands and contracts in the vertical direction is fixed to the connecting member 50A3 of the frame portion 51A, and the tip 59A1 of the hydraulic cylinder 59A is connected to the shift table 52A. It is connected to a joint 60A provided on the back surface.
- the frame portion 51A is provided with a plurality of guide members (not shown) for guiding the shift table 52A when the shift table 52A moves up and down.
- a positioning shaft (stopper portion) 61A extending upward from the upper end portion is provided at the upper end portion on the back side of the shift table 52A.
- the positioning shaft 61A passes through a through hole 62A formed in the upper member 50A1 of the frame portion 51A when the shift table 52A is raised, and contacts the index plate 63A provided in the upper frame member 45 of the apparatus main body 40. Touch.
- the distance between the index plate 63A and the upper end of the positioning shaft 61A is adjusted in advance to a predetermined shift amount (for example, the pitch P2 described above), and the shift table 52A is moved until the positioning shaft 61A hits the index plate 63A.
- a predetermined shift amount for example, the pitch P2 described above
- the index plate 63A has a plurality of plate portions with different thicknesses, and these plate portions are arranged on the same circumference so that the shift amount can be varied. This will be described later.
- valve hole processing procedure in the valve hole processing apparatus 1 having such a configuration will be described.
- the cylinder head 3 fixed to the pallet 5 transported by the transport conveyor 7 is loaded by the loader with left and right jig bodies 15A, 15B (shift tables 52A, 52B (FIG. 4)).
- the clamp device 9 drives the drive motors 41A and 41B to rotate the jig bodies 15A and 15B to a predetermined angle.
- the angles of the intake valve holes 34a to 34h and the exhaust valve holes 35a to 35h formed in the cylinder head 3 are known in advance.
- the drive motors 41A and 41B are controlled so that the jig body 15A faces the machining angle of the exhaust valve holes 35a to 35h, and the jig body 15B faces the machining angle of the intake valve holes 34a to 34h.
- the machine tool 13 rotates the intake side tools 26a to 26d and the exhaust side tools 28a to 28d provided on the multi-axis head 24 while rotating the multi-axis head 24 (multi-axis tool 22) with the clamping device 9.
- the cylinder heads 3 and 3 fixed to the jig bodies 15A and 15B.
- exhaust valve holes 35a, 35c, 35e, 35g on the upper side of each combustion chamber are formed by the exhaust side tools 28a to 28d, and the other jig body is provided.
- intake valve holes 34a, 34c, 34e, 34g on the upper side of each combustion chamber are formed by the intake side tools 26a to 26d.
- the multi-axis head 24 is separated from the cylinder heads 3 and 3 fixed to the jig bodies 15A and 15B and stands by at a predetermined position.
- the clamping device 9 raises the shift table 52A by a predetermined pitch P2 in one jig body 15A, and raises the shift table 52B by a predetermined pitch P1 in the other jig body 15B.
- the multi-axis head 24 (multi-axis tool 22) is slid again toward the cylinder heads 3 and 3.
- exhaust valve holes 35b, 35d, 35f, and 35h on the lower side of each combustion chamber are formed by the exhaust side tools 28a to 28d, and the other side is formed.
- intake valve holes 34b, 34d, 34f, and 34h on the lower side of each combustion chamber are formed by the intake side tools 26a to 26d.
- the cylinder head 3 fixed to one jig body 15A and processed with the exhaust valve holes 35a to 35h is moved to the other jig body 15B, whereby the intake valve hole is made to the cylinder head 3.
- 34a to 34h are processed.
- the other jig body 15 ⁇ / b> B is rotated toward the transport conveyor 7
- the cylinder head 3 fixed to the jig body 15 ⁇ / b> B is taken out, and placed on the transport conveyor 7.
- the left and right jig bodies 15A and 15B are rotated so as to face the machine tool 13, and the cylinder head 3 disposed on one jig body 15A is utilized by using a moving mechanism (not shown) provided in the clamp device 9.
- the moving mechanism includes a guide rail extending in the width direction of the left and right jig bodies 15A and 15B, a slider moving on the guide rail, and a pair of arms extending from the slider toward the jig body.
- the pallet 5 to which the cylinder head 3 is attached moves on the engaging members 54A and 54B of the jig bodies 15A and 15B. In this case, the gripping by the pallet clamp cylinder and the pallet positioning cylinder is released.
- valve hole processing is continuously performed by repeatedly performing the above-mentioned cutting process.
- the shift amounts of the shift tables 52A and 52B are regulated by the positioning shafts 61A and 61B coming into contact with the index plates 63A and 63B, respectively.
- the index plate 63A has a plurality of plate portions having different thicknesses, and these plate portions are arranged on the same circumference so that the shift amount is variable.
- a circular recess 64 ⁇ / b> A surrounding the rotation shaft 41 ⁇ / b> A ⁇ b> 1 of the drive motor 41 ⁇ / b> A is formed on the lower surface of the upper frame member 45 that forms the apparatus main body 40.
- a stopper support plate 66A formed in an annular shape is rotatably attached to the inner surface of the recess 64A via a bearing 65A, and an index plate 63A is attached to the lower surface of the stopper support plate 66A.
- a large diameter portion 66A1 having a large diameter is provided at the lower end of the stopper support plate 66A, and a lock cylinder 67A is provided at a height position of the large diameter portion 66A1.
- the lock cylinder 67A is fixed to the upper frame member 45, and extends toward the large-diameter portion 66A1 of the stopper support plate 66A, thereby fixing the stopper support plate 66A, and the stopper support plate 66A and the index.
- the rotation of the plate 63 is restricted.
- the index plate 63A includes a plurality (10 in the typical embodiment) of plate portions 70a to 70j having different thicknesses (that is, the width in the direction of the rotation shaft 41A1). To 70j are arranged on the same circumference.
- One plate part is formed in the horizontal surface of the same height, and each plate part is formed in step shape.
- the plate portion 70j is a blank plate portion that is formed as a through portion that penetrates in the thickness direction. Even if the shift table 52A is raised to the maximum extent, if the positioning shaft 61A intersects the index plate 63A at the portion of the through portion 70j, the positioning shaft 61A does not contact the index plate 63A in the axial direction (thickness direction). It has become. In this case, the upper end of the positioning shaft 61A extends above the contact surface of the adjacent plate portion 70a, and the wall surfaces of the plate portion 70a and the plate portion 70i (that is, both ends in the circumferential direction of the through portion 70j). Engaging the wall surface).
- the position where the positioning shaft 61A abuts can be arbitrarily adjusted within the range of the angle ⁇ . According to this, even if the cylinder heads are processed with the same shift amount, the angle at which the valve hole is processed can be easily adjusted, and minor changes and the like can be easily handled. Further, although not shown around the index plate 63A, the rotational position of the index plate 63A can be determined by detecting the thickness of the plate portion. Since the configuration around the drive motor 41B is substantially the same as that of the drive motor 41A, the same reference numerals are given and description thereof is omitted.
- the lock cylinder 67A is extended with the jig body (upper member 50A1) in a predetermined position, and the tip of the lock cylinder 67A is extended to the large size of the stopper support plate 66A.
- the stopper support plate 66A and the index plate 63A are prevented from rotating by abutting against the side surface of the diameter portion 66A1.
- the predetermined position refers to a position (angle) at which the machining direction of the valve hole formed in the cylinder block coincides with the tool extending direction of the multiaxial head 24.
- the jig body 15A is rotated so that the positioning shaft 61A is positioned below the blank plate portion 70j as shown in the portion (II) of FIG.
- the hydraulic cylinder 59A is operated to raise the shift table 52A.
- the positioning shaft 61A does not contact the index plate 63A even when the shift table 52A is raised to the maximum.
- the lock cylinder 67A is contracted to release the stopper support plate 66A and the index plate 63A.
- the drive motor 41A is operated to rotate the index plate 63A together with the jig body 15A.
- the index plate 63A is rotated until the plate portion having a desired thickness comes above the positioning shaft 61A at a predetermined position.
- the lock cylinder 67A is extended to fix the stopper support plate 66A and the index plate 63A.
- the hydraulic cylinder 59A is operated to lower the shift table 52A, and the engagement between the positioning shaft 61A and the index plate 63A is released.
- the shift amount at the predetermined position is adjusted to a desired value by rotating the jig body 15A to the predetermined position.
- the index plate 63A can be rotated, and the index plate 63A is provided with the blank plate portion 70j that engages with the lock cylinder 67A. Therefore, the drive motor 41A that rotates the jig body 15A is used.
- the index plate 63A can be rotated, and the device configuration can be simplified.
- the two cylinder heads 3 and 3 are arranged side by side, and the multi-axis head 24 is integrally provided with the intake side tools 26a to 26d and the exhaust side tools 28a to 28d.
- 35c, 35e, and 35g are simultaneously processed by the multi-axis head 24, one cylinder head 3 is raised by the pitch P1 of the intake valve holes, and the other cylinder head 3 is set by the pitch P2 of the exhaust valve holes.
- each valve hole can be processed in the cylinder head 3 with a simple configuration without preparing a plurality of multi-axis tools in accordance with the pitch of the valve holes. Furthermore, since the cylinder heads 3 and 3 are moved up and down with respect to the multi-axis head 24, the movement of the multi-axis head 24, which is a heavy object, is suppressed, and the valve hole can be easily processed.
- the cylinder head 3 formed with the exhaust valve holes 35a to 35h is moved in front of the intake side tools 26a to 26d of the multi-axis head 24, whereby one cylinder head 3 is provided.
- the exhaust valve holes 35a to 35h and the intake valve holes 34a to 34h can be continuously processed, and the processing operation can be easily performed.
- the shift tables 52A and 52B for fixing the two cylinder heads 3 and 3 arranged side by side, and the shift tables 52A and 52B are arranged so as to face each other.
- a multi-axis head integrally including intake side tools 26a to 26d for machining part of the intake valve holes 34a to 34h and exhaust side tools 28a to 28d for machining part of 35a to 35h of the other cylinder head 3 24 and hydraulic cylinders 59A and 59B for individually moving the cylinder heads 3 and 3 by a length corresponding to the pitches P1 and P2 of the valve holes with respect to the multi-axis head 24.
- the processing of the intake valve holes 34a to 34h of one cylinder head 3 and the processing of the exhaust valve holes 35a to 35h of the other cylinder head 3 are performed.
- the clamping device is used at the time of machining the valve hole for the cylinder head 3, and the shift tables 52A and 52B and the shift tables 52A and 52B are rotatable around the rotation shafts 41A1 and 41A2.
- Pallet clamp cylinders 55A, 55B, 56A, 56B and positioning cylinders 57A which are provided on the drive motors 41A, 41B for adjusting the rotational position of the pallet and for holding the pallet 5 on which the cylinder head 3 is mounted.
- the index plates 63A and 63 have a plurality of plates 70a to 70j having different thicknesses, and these plate portions 70a to 70j are arranged concentrically, so that the positioning shaft 61A is rotated by rotating the index plates 63A and 63B. , 61B can be changed in thickness, and the lifting / lowering amount of the cylinder head 3 can be changed with a simple configuration.
- the index plates 63A and 63B are not in contact with the positioning shafts 61A and 61B when the shift tables 52A and 52B are raised to the maximum, and are engaged with the index plates 63A and 63B.
- a blank plate portion 70j is provided, and with the positioning shafts 61A and 61B engaged with the plate portion 70j, the drive motors 41A and 41B are rotated to rotate the index plates 63A and 63B together with the shift tables 52A and 52B. Since the configuration is adopted, the index plates 63A and 63B can be rotated by using the drive motors 41A and 41B for adjusting the rotational positions of the shift tables 52A and 52B. Therefore, the device configuration is simplified and the cylinder of the workpiece can be simplified. Change the amount of head 3 lift Rukoto can.
- the plurality of valve holes 34, 35 of the cylinder head 3 of the internal combustion engine use the first tool 26 and the second tool 28, and one of the pair of first valve holes 34.
- 34 is processed with the first tool 26, the cylinder head 3 is moved with respect to the first tool 26, and then the other 34 of the pair of first valve holes 34 is processed with the first tool 26; After machining one 35 of the pair of second valve holes 35 with the second tool 28 and moving the cylinder head 3 relative to the second tool 28, the other 35 of the pair of second valve holes 35 is moved.
- This configuration makes it possible to machine the valve hole in the cylinder head with a simple configuration without preparing a plurality of multi-axis tools in accordance with the pitch of the valve holes. Furthermore, since the cylinder head is moved relative to the multi-axis tool, the movement of the multi-axis tool, which is a heavy object, is suppressed, and the valve hole machining operation can be easily performed.
- a pair of cylinder heads 3 are arranged side by side, and the first multi-axis tool 22 that integrally includes the first tool 26 and the second tool 28 is used to One of the valve holes 34 and one of the second valve holes 35 of the other cylinder head 3 are processed, and the pitch P1 between the pair of first valve holes 34 or the pair of second valve holes 35 is processed.
- Each cylinder head 3 is moved relative to the integrated multi-axis tool 22 by a pitch P2 between the first valve hole 34 of one cylinder head 3 and the second of the other cylinder head 3. You may process with the other of the valve hole 35.
- FIG. According to this configuration, machining of the intake valve hole of one cylinder head and machining of the exhaust valve hole of the other cylinder head can be realized by two cutting processes, thereby reducing the machining process. Work time can be reduced.
- the cylinder head 3 in which one of the pair of first valve holes 34 and the pair of second valve holes 35 is formed is connected to the pair of first valve holes 34 and the pair of second valve holes 35.
- the other of them may be moved before the tools 26 and 28 for machining.
- the intake valve hole and the exhaust valve hole can be continuously processed for one cylinder head, and the processing operation can be easily performed.
- the valve hole processing apparatus 1 for processing a plurality of intake valve holes and exhaust valve holes with respect to the cylinder head of the internal combustion engine includes two cylinder heads 3 and 3. Two main body portions 15A and 15B to be fixed, a first tool 26 that is disposed to face the main body portions 15A and 15B, and that processes the intake valve hole 34 of one cylinder head 3, and the other cylinder head 3 A multi-axis tool 22, and moving devices 59 ⁇ / b> A and 59 ⁇ / b> B that individually move the cylinder heads 3 with respect to the multi-axis tool 22. May be.
- the machining of the intake valve hole of one cylinder head and the exhaust valve hole of the other cylinder head can be realized by cutting twice, so that the machining process can be reduced. It is possible to reduce the work time.
- the clamping device 9 includes the main body portions 52A and 52B that can rotate around the rotation shafts 41A1 and 41B1, and the rotation units 41A and 41B that adjust the rotation positions of the main body portions 52A and 52B. And stopper portions 61A and 61B fixed to one end portion in the axial direction of the main body portions 52A and 52B, biasing devices 59A and 59B for pressing the main body portions 52A and 52B to one of the axial directions, and the main body portions 52A and 52B Index plates 63A and 63B with which the stopper portions 61A and 61B abut when pressed against one of the directions may be provided.
- the index plates 63A and 63B may have a plurality of plate portions 70a to 70j having different thicknesses.
- the plurality of plate portions 70a to 70j may be arranged on the same circumference.
- the stopper portion fixed to one end portion in the axial direction of the main body portion that holds the workpiece, the urging device that presses the main body portion to one of the axial directions, and the main body portion is pressed to one of the axial directions.
- the index plate has a plurality of plate portions having different thicknesses, and these plate portions are arranged on the same circumference. Therefore, by rotating the index plate, the thickness of the plate portion to which the stopper portion abuts. The shift amount of the workpiece can be changed with a simple configuration.
- the index plates 63A and 63B are configured so that the main body portions 52A and 52B do not contact the stopper portions 61A and 61B in the axial direction when the main body portions 52A and 52B are moved to the maximum in the axial direction.
- 70j may be provided.
- the index plates 63A and 63B become the main body portion 52A, It may be configured to rotate with 52B.
- the index plate can be rotated using the rotation unit that adjusts the rotation position of the main body, the device configuration is simplified, and the shift amount of the workpiece can be changed with a simple configuration. .
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Abstract
Description
クランプ装置9は、搬送コンベア7と工作機械13との間に配置され、パレット5ごとシリンダヘッド3が固定される左右一対のジグボディ(本体部)15A,15Bを備える。このジグボディ15A,15Bは、それぞれ鉛直方向に延びる回転軸周りを回転可能に構成されており、当該ジグボディ15A,15Bを搬送コンベア7側に向け、この搬送コンベア7側からシリンダヘッド3を取り付けた後、当該シリンダヘッド3を工作機械13側に向けることができるようになっている。また、搬送コンベア7とジグボディ15A,15Bとのシリンダヘッド3及びパレット5の着脱は、不図示のローダ(供給装置)によって実行されている。
典型的実施例では、シリンダヘッド3は、図2Aに示すように、直列4気筒16バルブのエンジンを構成しており、各燃焼室(シリンダ)31a~31dに対応して吸気ポート32a~32hと排気ポート33a~33hとが設けられる。また、吸気ポート32a~32hには、これら吸気ポート32a~32hを開閉自在に作動する吸気バルブ(不図示)が取り付けられる吸気用バルブ孔34(34a~34h)が形成され、排気ポート33a~33hには、これら排気ポート33a~33hを開閉自在に作動する排気バルブ(不図示)が取り付けられる排気用バルブ孔35(35a~35h)が形成されている。
また、一の燃焼室31a内では、吸気用バルブ孔34a及び排気用バルブ孔35aが高さ方向に所定のオフセット量Lだけオフセットした位置に形成されており、この関係は他の燃焼室31b~31dにおいても同様である。
また、燃焼室31a~31d内では、各燃焼室31a~31d内の同一の位置に形成された吸気用バルブ孔及び排気用バルブ孔がそれぞれ同一のピッチP3で形成されている。
図3は、工作機械13の外観を示す模式図である。この工作機械13は、基台21と、この基台21の上に水平方向(矢印A方向)に進退自在に配設される多軸工具22とを備える。この多軸工具22は、複数の工具を取り付けられる多軸ヘッド24と、この多軸ヘッド24を駆動する駆動ユニット25とを備え、基台21の上部に設けられるガイドレール23上に配置されている。多軸工具22と基台21との間には、例えば、ボールねじ手段等の搬送機構(不図示)が設けられ、このボールねじ手段を搬送モータ(不図示)が駆動させることにより、当該ボールねじ手段に係合する多軸工具22がガイドレール23上を前後にスライド移動する。
吸気側工具ホルダ27a~27d及び排気側工具ホルダ29a~29dは、それぞれ鉛直方向に沿って配置されており、各吸気側工具ホルダ27a~27d間及び各排気側工具ホルダ29a~29d間のピッチP3は、各燃焼室31a~31d内の同一の位置に形成された吸気用バルブ孔及び排気用バルブ孔のピッチP3と同一に形成されている。また、吸気側工具ホルダ27a及び排気側工具ホルダ29aにそれぞれ取り付けられる吸気側工具26aと排気側工具28aとの軸心は、上下方向に上記したオフセット量Lだけオフセットされている。
典型的実施例では、吸気側工具26a~26d及び吸気側工具ホルダ27a~27dを備えて吸気側バルブ孔用多軸工具を構成し、排気側工具28a~28d及び排気側工具ホルダ29a~29dを備えて排気側バルブ孔用多軸工具を構成する。
図4は、クランプ装置9の外観を示す模式図であり、図5は、クランプ装置9の側断面図である。クランプ装置9は、図4に示すように、フレームを構成する装置本体40と、この装置本体40に回転自在に設けられたジグボディ15A,15Bと、これらジグボディ15A,15Bを回転させるとともに当該ジグボディ15A,15Bの回転位置を調整する駆動モータ(回転ユニット)41A,41Bとを備える。これら駆動モータ41A,41Bは、図5に示すように、ハウジング42A,42Bに収容されて装置本体40に固定されており、ジグボディ15A,15Bの回転位置を検出するエンコーダ(不図示)が設けられている。この図4では、説明の便宜上、ハウジング42A,42Bの記載を省略し、駆動モータ41A,41Bを露出した状態を示している。
装置本体40は、図4に示すように、基台43と、この基台43から上方に延びる左右一対の柱部材44A,44Bと、この柱部材44A,44Bの上部間を接続する上枠材45とを備え、門型に形成されている。基台43上には、駆動モータ41A,41Bの下方にそれぞれ略円柱状のテーブルベース43A,43Bが設けられ、これらテーブルベース43A,43B上に、駆動モータ41A,41Bに連結されたジグボディ15A,15Bが回転自在に載置されている。
ジグボディ15Aは、図5に示すように、駆動モータ41Aの回転軸41A1に連結される上部材50A1と、テーブルベース43A上に回転自在に載置される下部材50A2と、これら上部材50A1及び下部材50A2連結する連結部材50A3とを一体に備えて断面コ字状に形成されるフレーム部51Aと、このフレーム部51Aに対して昇降自在なシフトテーブル(本体部)52Aとを備える。
上部材50A1は、装置本体40の上枠材45の下方に延在し、この上枠材45を貫通する駆動モータ41Aの回転軸41A1に連結されている。また、下部材50A2と装置本体40のテーブルベース43Aとの間にはベアリング(不図示)が配置されて回動自在となっている。このため、駆動モータ41Aの回転に応じて、フレーム部51A(ジグボディ15A)が装置本体40に対して一体に回転する。また、駆動モータ41Aはエンコーダを備えているため、このエンコーダにより、ジグボディ15Aが基準位置(工作機械に対して正対する位置)からの回転量(回転角度)が算出される。
また、シフトテーブル52Aの上端には、このシフトテーブル52Aの板厚方向に伸縮する一対のパレットクランプシリンダ55A,55Aが設けられている。このパレットクランプシリンダ55Aの先端部は下方に向けて延び、係合部材53Aに設けられた切欠きを通じて当該係合部材53A内に侵入するようになっている。また、シフトテーブル52Aの下端には、このシフトテーブル52Aの板厚方向に伸縮する一対のパレットクランプシリンダ56A,56Aが設けられている。このパレットクランプシリンダ56Aの先端部は上方に向けて延び、係合部材54Aに設けられた切欠きを通じて当該係合部材54A内に侵入するようになっている。
シフトテーブル52Aの背面には、このシフトテーブル52Aを貫通して当該シフトテーブル52Aの板厚方向に伸縮するパレット位置決めシリンダ57A,58Aが設けられている。このパレット位置決めシリンダ57Aは、係合部材53Aの下方であって、上記したパレットクランプシリンダ55A,55Aの略中央に設けられている。また、パレット位置決めシリンダ58Aは、係合部材54Aの上方であって、上記したパレットクランプシリンダ56A,56Aの略中央に設けられている。本構成では、図5に示すように、パレットクランプシリンダ55A,55Aとパレット位置決めシリンダ57Aとで、係合部材53A,54A間に配置されたパレット5の上端部が把持され、パレットクランプシリンダ56A,56Aとパレット位置決めシリンダ58Aとで当該パレット5の下端部が把持されるようになっており、これらパレットクランプシリンダ55A,56Aとパレット位置決めシリンダ57A,58Aが把持部を構成する。
フレーム部51Aの連結部材50A3には、図5に示すように、鉛直方向に伸縮する油圧シリンダ(付勢装置、移動装置)59Aが固定され、この油圧シリンダ59Aの先端部59A1がシフトテーブル52Aの背面に設けられたジョイント60Aに連結されている。また、フレーム部51Aには、シフトテーブル52Aが昇降する際に、このシフトテーブル52Aを案内する複数のガイド部材(不図示)が設けられている。
また、シフトテーブル52Aの背面側の上端部には、この上端部から上方に延びる位置決めシャフト(ストッパ部)61Aが設けられている。この位置決めシャフト61Aは、シフトテーブル52Aを上昇した際に、フレーム部51Aの上部材50A1に形成された貫通孔62Aを貫通し、装置本体40の上枠材45に設けられたインデックスプレート63Aに当接する。このインデックスプレート63Aと位置決めシャフト61Aの上端との距離は、予め所定のシフト量(例えば、上記したピッチP2)に調整されており、位置決めシャフト61Aがインデックスプレート63Aに突き当るまで、シフトテーブル52Aを上昇させることにより、簡単にシフトテーブル52Aのシフト量を規制することができる。また、このインデックスプレート63Aは、厚みが異なる複数のプレート部を有し、これらプレート部を同一円周上に配列してシフト量を可変に構成されているが、この点については後述する。
まず、図1に示すように、搬送コンベア7によって搬送されたパレット5に固定されたシリンダヘッド3は、ローダにより、クランプ装置9の左右のジグボディ15A,15B(シフトテーブル52A,52B(図4))に固定される。
続いて、クランプ装置9は、駆動モータ41A,41Bを駆動して、ジグボディ15A,15Bを所定の角度に回転させる。この場合、シリンダヘッド3に形成される吸気用バルブ孔34a~34h及び排気用バルブ孔35a~35hは、角度が予め分かっている。このため、ジグボディ15Aは、排気用バルブ孔35a~35hの加工角度を向くように、ジグボディ15Bは、吸気用バルブ孔34a~34hの加工角度を向くように、各駆動モータ41A,41Bが制御される。
続いて、クランプ装置9は、一方のジグボディ15Aにおいて、シフトテーブル52Aを所定ピッチP2上昇させ、他方のジグボディ15Bにおいて、シフトテーブル52Bを所定ピッチP1上昇させる。そして、再び、多軸ヘッド24(多軸工具22)をシリンダヘッド3,3に向けてスライド移動させる。これにより、一方のジグボディ15Aに固定されたシリンダヘッド3では、排気側工具28a~28dにより、各燃焼室の下側の排気用バルブ孔35b,35d,35f,35hが形成されるとともに、他方のジグボディ15Bに固定されたシリンダヘッド3では、吸気側工具26a~26dにより、各燃焼室の下側の吸気用バルブ孔34b,34d,34f,34hが形成される。
従って、2回の切削工程により、並設された一方のシリンダヘッド3に対して、排気用バルブ孔35a~35hが加工され、他方のシリンダヘッド3に対して、吸気用バルブ孔34a~34hが加工されるため、加工の工程を低減して簡単にバルブ孔加工を行うことができる。
具体的には、まず、他方のジグボディ15Bを搬送コンベア7側に回転させて、このジグボディ15Bに固定されたシリンダヘッド3を取り出して、搬送コンベア7上に載置する。そして、左右のジグボディ15A,15Bを工作機械13に正対させるように回転し、クランプ装置9に設けられた移動機構(不図示)を利用して、一方のジグボディ15Aに配置されたシリンダヘッド3を、他方のジグボディ15Bに移動させる。
移動機構は、左右のジグボディ15A,15Bの幅方向に延びるガイドレールと、このガイドレール上を移動するスライダと、このスライダからジグボディに向けて延びる一対のアームを備え、このアームでシリンダヘッド3を保持した状態でスライダがガイドレール上を移動することにより、シリンダヘッド3が取り付けられたパレット5が、ジグボディ15A,15Bの係合部材54A,54B上を移動する。この場合、パレットクランプシリンダ及びパレット位置決めシリンダによる把持は解除されている。
このため、本構成では、インデックスプレート63Aは、厚みが異なる複数のプレート部を有し、これらプレート部を同一円周上に配列してシフト量を可変としている。
また、ストッパ支持板66Aの下端には、大径に形成された大径部66A1が設けられ、この大径部66A1の高さ位置にロックシリンダ67Aが設けられている。このロックシリンダ67Aは、上枠材45に固定されており、ストッパ支持板66Aの大径部66A1に向けて伸長することにより、このストッパ支持板66Aを固定して、当該ストッパ支持板66A及びインデックスプレート63の回転を規制する。
インデックスプレート63Aは、図7A、Bに示すように、厚み(すなわち、回転軸41A1の方向の幅)が異なる複数(典型的実施例では10)のプレート部70a~70jを備え、これらプレート部70a~70jを同一円周上に配列して形成している。一のプレート部は同じ高さの水平面に形成され、各プレート部が階段状に形成されている。
このため、位置決めシャフト61Aの上端をプレート部70aまたはプレート部70iの壁面に係合させ、ロックシリンダ67Aを解除した状態で、駆動モータ41Aを駆動させると、位置決めシャフト61Aに引きずられて、インデックスプレート63Aが回転する。これにより、所望する高さ位置のプレート部に合わせることにより、シフト量を容易に変更することが可能となり、容易に加工を行うことができる。
また、本構成では、厚みが異なる複数のプレート部70a~70jを同一円周上に配列しているため、インデックスプレート63Aの回転量を調整することにより、一のプレート部(図7Aでは、プレート部70e)において、位置決めシャフト61Aが当接する箇所を、角度βの範囲で任意に調整することができる。これによれば、同一のシフト量で加工するシリンダヘッドであっても、バルブ孔の加工する角度を容易に調整することができ、マイナーチェンジ等にも容易に対応することができる。
また、インデックスプレート63Aの周囲には、図示は省略したが、プレート部の厚みを検出することから、当該インデックスプレート63Aの回転位置を判別可能となっている。なお、駆動モータ41B回りの構成については、駆動モータ41Aと略同一であるため、同様の符号を付して説明を省略する。
まず、図8の(I)の部分に示すように、ジグボディ(上部材50A1)が所定位置にある状態で、ロックシリンダ67Aを伸長させて、このロックシリンダ67Aの先端をストッパ支持板66Aの大径部66A1の側面に当接させ、当該ストッパ支持板66A及びインデックスプレート63Aの回転を防止する。ここで、所定位置とは、シリンダブロックに形成されるバルブ孔の加工方向と多軸ヘッド24の工具の延出方向とが一致する位置(角度)をいう。
続いて、ジグボディ15Aを回転させて、図8の(II)の部分に示すように、位置決めシャフト61Aがブランクのプレート部70jの下方に位置させる。そして、図8の(III)の部分に示すように、油圧シリンダ59Aを動作させて、シフトテーブル52Aを上昇させる。この場合、位置決めシャフト61Aの上方には、ブランクのプレート部70jが位置しているため、シフトテーブル52Aを最大限上昇させても、位置決めシャフト61Aはインデックスプレート63Aには当接しない。
続いて、図8の(VI)の部分に示すように、ロックシリンダ67Aを伸長させて、ストッパ支持板66A及びインデックスプレート63Aを固定する。そして、図8の(VII)の部分に示すように、油圧シリンダ59Aを動作させて、シフトテーブル52Aを下降させ、位置決めシャフト61Aとインデックスプレート63Aとの係合を解除する。
最後に、図8の(VIII)の部分に示すように、ジグボディ15Aを所定位置まで回転させることで、この所定位置におけるシフト量が所望の値に調整される。
このように、本構成では、インデックスプレート63Aを回転可能とするとともに、このインデックスプレート63Aに、ロックシリンダ67Aと係合するブランクのプレート部70jを設けたため、ジグボディ15Aを回転させる駆動モータ41Aを利用してインデックスプレート63Aを回転させることができ、装置構成を簡素化できる。
また、典型的実施例によれば、バルブ孔のピッチに合わせて複数の多軸工具を用意することなく、簡単な構成でシリンダヘッド3に各バルブ孔を加工することができる。さらに、シリンダヘッド3,3を多軸ヘッド24に対して昇降させるため、重量物である多軸ヘッド24の移動が抑制され、バルブ孔の加工作業を容易に行うことができる。
この構成によれば、2度の切削工程により、一方のシリンダヘッドの吸気用バルブ孔の加工と、他方のシリンダヘッドの排気用バルブ孔の加工とを実現できるため、加工工程の減少を図ることができ、作業時間の短縮を実現できる。
この構成によれば、一のシリンダヘッドに対して、吸気用バルブ孔と排気用バルブ孔とを連続的に加工することができ、加工作業を容易に行うことができる。
この構造によれば、2度の切削により、一方のシリンダヘッドの吸気用バルブ孔の加工と、他方のシリンダヘッドの排気用バルブ孔の加工とを実現できるため、加工工程の減少を図ることができ、作業時間の短縮を実現できる。
この構造によれば、本体部の回転位置を調整する回転ユニットを用いて、インデックスプレートを回転することができるため、装置構成が簡素化し、簡単な構成でワークのシフト量を変更することができる。
3 シリンダヘッド(ワーク)
5 パレット
7 搬送コンベア
9 クランプ装置
13 工作機械
15A,15B ジグボディ
22 多軸工具
24 多軸ヘッド(一体型多軸ヘッド)
26a~26d 吸気側工具(吸気側バルブ孔用多軸工具)
27a~27d 吸気側工具ホルダ(吸気側バルブ孔用多軸工具)
28a~28d 排気側工具(排気側バルブ用多軸工具)
29a~29d 排気側工具ホルダ(排気側バルブ用多軸工具)
34a~34h 吸気用バルブ孔
35a~35h 排気用バルブ孔
40 装置本体
41A,41B 駆動モータ(回転ユニット)
51A フレーム部
52A,52B シフトテーブル(本体部)
55A,55B パレットクランプシリンダ(把持部)
56A,56B パレットクランプシリンダ(把持部)
57A,57B 位置決めシリンダ(把持部)
58A,58B 位置決めシリンダ(把持部)
59A 油圧シリンダ(付勢装置、移動装置)
61A,61B 位置決めシャフト(ストッパ部)
63A,63B インデックスプレート
70a~70j プレート部
P1~P3 ピッチ
Claims (6)
- 内燃機関のシリンダヘッド(3)の複数のバルブ孔(34,35)の加工方法であって、
第1の工具(26)と、第2の工具(28)とを用い、
一対の第1のバルブ孔(34)の一方(34)を前記第1の工具(26)で加工し、前記シリンダヘッド(3)を前記第1の工具(26)に対して移動させた後、前記一対の第1バルブ孔(34)の他方(34)を前記第1の工具(26)で加工し、
一対の第2のバルブ孔(35)の一方(35)を前記第2の工具(28)で加工し、前記シリンダヘッド(3)を前記第2の工具(28)に対して移動させた後、前記一対の第2のバルブ孔(35)の他方(35)を前記第2の工具で加工する、
シリンダヘッドのバルブ孔の加工方法。 - 一対のシリンダヘッド(3)を並べて配置し、
前記第1の工具(26)と第2の工具(28)とを一体に備える一体型多軸工具(22)を用いて、
一方のシリンダヘッド(3)の第1のバルブ孔(34)の一方と、他方のシリンダヘッド(3)の第2のバルブ孔(35)の一方とを、加工し、
前記一対の第1のバルブ孔(34)の間のピッチ(P1)分または一対の第2のバルブ孔(35)の間のピッチ(P2)分だけ、各シリンダヘッド(3)を前記一体型多軸工具(22)に対して移動させ、
一方のシリンダヘッド(3)の第1のバルブ孔(34)の他方と、他方のシリンダヘッド(3)の第2のバルブ孔(35)の他方と、加工する、
請求項1に記載のシリンダヘッドのバルブ孔の加工方法。 - 前記一対の第1のバルブ孔(34)と前記一対の第2のバルブ孔(35)の一方が形成されたシリンダヘッド(3)を、前記一対の第1のバルブ孔(34)と前記一対の第2のバルブ孔(35)の他方を加工する工具(26,28)の前に移動させる、
請求項1または2に記載のシリンダヘッドのバルブ孔の加工方法。 - 内燃機関のシリンダヘッドに対して、複数の吸気用バルブ孔及び排気用バルブ孔を加工するバルブ孔の加工装置であって、
2つのシリンダヘッド(3,3)が固定される2つの本体部(15A,15B)と、
前記本体部(15A,15B)に対向して配置され、一方のシリンダヘッド(3)の吸気用バルブ孔(34)を加工する第1の工具(26)と、他方のシリンダヘッド(3)の排気用バルブ孔(35)を加工する第2の工具(28)とを、備える、多軸工具(22)と、
前記多軸工具(22)に対して前記各シリンダヘッド(3)を個別に移動させる移動装置(59A,59B)と、
を具備する、バルブ孔の加工装置(1)。 - 回転軸(41A1,41B1)の周りを回転可能な本体部(52A,52B)と、
前記本体部(52A,52B)の回転位置を調整する回転ユニット(41A,41B)と、
前記本体部(52A,52B)の軸方向の一端部に固定したストッパ部(61A,61B)と、
前記本体部(52A,52B)を軸方向の一方に押し付ける付勢装置(59A,59B)と、
前記本体部(52A,52B)が軸方向の前記一方に押し付けられた際に、前記ストッパ部(61A,61B)が当接するインデックスプレート(63A,63B)と、
を具備し、
前記インデックスプレート(63A,63B)は、厚みが異なる複数のプレート部(70a~70j)を有し、前記複数のプレート部(70a~70j)は同一円周上に配列されている、
クランプ装置(9)。 - 前記インデックスプレート(63A,63B)は、前記本体部(52A,52B)が軸方向の前記一方に最大限に移動した際に、前記ストッパ部(61A,61B)と軸方向に当接しないように構成された貫通部(70j)を備え、
この貫通部(70j)の周方向の端に位置する壁面に前記ストッパ部(61A,61B)が前記周方向に係合した状態で、前記回転ユニット(41A,41B)を回転させることによって、前記インデックスプレート(63A,63B)が前記本体部(52A,52B)とともに回転するように構成されている、
請求項5に記載のクランプ装置(9)。
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CN112453971A (zh) * | 2020-11-26 | 2021-03-09 | 四川航天长征装备制造有限公司 | 一种阀体车削夹具 |
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