WO2002003044A1 - Machine de centrage de masse - Google Patents

Machine de centrage de masse Download PDF

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Publication number
WO2002003044A1
WO2002003044A1 PCT/JP2001/005682 JP0105682W WO0203044A1 WO 2002003044 A1 WO2002003044 A1 WO 2002003044A1 JP 0105682 W JP0105682 W JP 0105682W WO 0203044 A1 WO0203044 A1 WO 0203044A1
Authority
WO
WIPO (PCT)
Prior art keywords
work
workpiece
pair
station
crankshaft
Prior art date
Application number
PCT/JP2001/005682
Other languages
English (en)
Japanese (ja)
Inventor
Tatsuya Ioka
Masami Matsuo
Original Assignee
Nagahama Seisakusho Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nagahama Seisakusho Ltd. filed Critical Nagahama Seisakusho Ltd.
Publication of WO2002003044A1 publication Critical patent/WO2002003044A1/fr

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Classifications

    • 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
    • B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/20—Arrangements for observing, indicating or measuring on machine tools for indicating or measuring workpiece characteristics, e.g. contour, dimension, hardness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
    • B23B5/18—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor for turning crankshafts, eccentrics, or cams, e.g. crankpin lathes
    • 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
    • B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/18—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for positioning only
    • B23Q3/183—Centering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B5/00—Clamps
    • B25B5/16—Details, e.g. jaws, jaw attachments
    • B25B5/163—Jaws or jaw attachments
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M1/00—Testing static or dynamic balance of machines or structures
    • G01M1/14—Determining imbalance
    • G01M1/16—Determining imbalance by oscillating or rotating the body to be tested
    • G01M1/24—Performing balancing on elastic shafts, e.g. for crankshafts

Definitions

  • the present invention relates to a mass centering machine for forming a centering hole for centering as a processing reference in a rotating body such as a crankshaft for an automobile engine.
  • Conventional technology for forming a centering hole for centering as a processing reference in a rotating body such as a crankshaft for an automobile engine.
  • crankshaft for an automobile engine is integrally formed by forging or forging, it is first centered. In centering, a center hole is made at the position where the rotation axis of the crankshaft and the main axis of inertia coincide. The crankshaft with the center hole is then subjected to the necessary processing with the center hole as the processing standard.
  • Mass centering is performed by a device called a mass centering machine.
  • An example of a mass centering machine is disclosed in Japanese Patent Application Laid-Open No. Sho. In the mass centering machine disclosed in this publication, when a work such as a crankshaft is held once, the unbalance is measured while the work is held, and a center hole is drilled based on the measurement result.
  • the present invention relates to an improvement of a mass centering machine in which a measuring station and a processing station are separated as in the latter.
  • a holding device for holding a work is indispensable in order to measure the unbalance of the work and make a hole in the center for a peak.
  • a holding device with a strong holding force is necessary. Therefore, there was a problem that it was difficult to reduce the size and weight of the holding device.
  • the holding device of the measuring station does not need to have a strong holding force, but the holding device of the processing station must have a strong holding force. Due to the difference in the holding force, there is a possibility that the holding position of the work may be slightly shifted.
  • the holding device in the measuring station, in order to increase the measurement accuracy of the unbalance, the holding device is designed to be lightweight, and the holding device holds the work with a relatively small holding force.
  • the work processed by the mass centering machine is a state formed by forging or forging without any processing as described above, and the surface of the workpiece is a rough surface covered with a so-called black scale. It is.
  • the holding force when the work is held by the holding device of the measuring station, the holding force is weak, and there is almost no holding mark on the work surface.
  • the holding force is reduced. Due to the fireflies, retention marks are left on the work surface. Strictly speaking, the holding state in the measurement station is slightly different from the holding state in the force p station, and it is difficult to improve the accuracy when drilling a hole in the center based on the measurement results. 7 Disclosure of the invention
  • the present invention has been made to solve the above problems.
  • An object of the present invention is to provide a mass centering machine capable of realizing a small and lightweight holding device in a processing station.
  • Another object of the present invention is to provide a mass centering machine capable of forming a holding mark on a work surface at a measuring station and accurately holding exactly the same position at a processing station.
  • the invention according to claim 1 includes a measuring station for measuring the unbalance of a workpiece rotating about an axis, and a processing station for at least drilling a hole in the workpiece based on the measurement result.
  • a machining center provided with a holding device for holding a workpiece, wherein the processing station comprises:
  • the mass centering machine is characterized in that the placement includes a clamp claw that makes point contact with the workpiece.
  • the holding device is configured such that, when the work is viewed in the axial direction, a pair of seating surfaces for receiving the work from diagonally below left and right; 2.
  • the invention according to claim 3 is the mass centering machine according to claim 2, wherein the holding device has a drive source for driving a pair of clamp claws.
  • the clamp claw has a shape that makes point contact with the surface of the work when viewed in the axial direction of the work, and has a shape that makes linear contact with the surface of the work when viewed in a direction perpendicular to the axial direction of the work.
  • 2 is a mass centering machine described in 2.
  • the invention according to claim 5 is the mass sensor ring machine according to claim 4, wherein the clamp claw has a shape that is convexly curved downward when viewed in a direction orthogonal to the axial direction of the workpiece. .
  • the invention according to claim 6 is the mass centering machine according to claim 4, wherein the clamp claw has a shape protruding downward in a rectangular shape when viewed in a direction orthogonal to the axial direction of the workpiece. is there.
  • the invention according to claim 7 is the mass centering machine according to claim 1 or 2, wherein the clamp claw protrudes downward in an inverted triangular pyramid shape and has a sharp lower end.
  • a measuring station for measuring unbalance of a work rotating about an axis, and a processing station for making at least a center hole in the work based on the measurement result.
  • a mass centering machine having a pre-processing station for performing pre-processing on a workpiece before measuring unbalance at a measuring station, wherein the pre-processing station has a pair of a pre-processing station for holding the workpiece.
  • a holding device is provided, and each holding device holds a workpiece.
  • a pair of seating surfaces and a pair of clamps are included. The pair of seating surfaces can respectively receive the workpiece from obliquely below, and the pair of clamps are provided to face the pair of seating surfaces.
  • This mass-sensing ring machine is equipped with a work holder that presses the work from above to below so that the surface of the work to be seated is marked.
  • the invention according to claim 9 is the mass centering machine according to claim 8, characterized in that the pretreatment station is incorporated in the measurement station.
  • the holding device for the aesthetic treatment includes a crimping claw that makes a point contact or a line contact with the workpiece in the axial direction.
  • the peak is subjected to axial thrust and rotational torque during machining to make a hole in the center. Clumph.
  • the claws make point contact with the workpiece when the workpiece is viewed in the axial direction. Therefore, when the axial thrust and the rotational torque are applied to the work, the clamp claws that come into contact with each other work to bite into the workpiece surface, and the work tries to rotate against the axial thrust and the rotational torque. And hold the work firmly.
  • the clamp claw makes point contact or linear contact with the workpiece in the axial direction of the workpiece, so that the clamp claw applied to the clamp claw may be small. Accordingly, it is possible to reduce the size and weight of the hydraulic unit, air unit, and solenoid unit that provide clamps, and to reduce the size and weight of the entire holding device.
  • the pretreatment station in the pretreatment station, the workpiece is pressed against the seating surface by the work holder, and a seating mark is formed on the work surface. Therefore, when the workpiece is repeatedly held, the trace of seating is received, and the reproducibility of seating is improved.
  • the seating marks are formed on the surface of the work in the pre-processing station, the work can be held in the measuring station and the processing station in the same holding state. Therefore, the accuracy of mass centering is improved.
  • the processing performed by the pre-processing station can be performed in the measurement station, so that the configuration is simpler, and the reproducibility of seating can be improved. In addition, the accuracy of measurement repetition and the accuracy of mass centering are improved.
  • FIG. 1 is a block diagram showing a mass centering machine according to one embodiment of the present invention.
  • FIG. 2 is a partially cutaway front view showing a measuring station of the mass centering machine.
  • FIG. 3 is a cross-sectional view of the measuring station taken along line ⁇ -III in FIG.
  • FIG. 4 is a cross-sectional view showing the operation of a clamp member in the above-described self-measurement station for keeping the gripping angle of a crankshaft as a rotating body constant.
  • FIG. 5 is a sectional view showing an outer diameter measuring station of the mass centering machine.
  • FIG. 6 is a front view showing a processing station of the mass centering machine.
  • FIG. 7 is a sectional view of the processing station.
  • FIG. 8 is a perspective view of the combined cutting tool attached to the processing spindle of the processing station.
  • FIG. 9 is a diagram for explaining a problem in the holding device of the heating station 2.
  • FIG. 1 ⁇ is a diagram showing a configuration of a holding device according to an embodiment of the present invention in a heating station.
  • FIG. 11 shows the seating surface and crimp of the holding device at the processing station.
  • FIG. 3 is a diagram for explaining a configuration of a nail.
  • FIG. 12 is an illustrative view showing a modified example of the clamp claws of the holding device in the processing station.
  • FIG. 13 is a diagram showing a configuration of a measuring device according to an embodiment of the present invention in a measuring station.
  • the mass centering machine in this example is for centering the crankshaft Cs as a rotating body, and as shown in FIG. 1, the deviation of the crankshaft Cs between the rotation axis and the main axis of inertia is determined.
  • the outer diameter of both shaft end portions C s 1 and C s 2 of the portion to be processed of the crank shaft C s is disposed between the two stations 1 and 2.
  • the outer diameter measuring station 3 to be measured and the crankshaft Cs are machined from the unprocessed crankshaft Cs supply section through each station 1 to 3 while maintaining their postures almost constant.
  • Class A transport unit 6 that transports the ink shaft Cs to the take-out unit 5 and a control unit 7 that controls the operation of each of the above units are provided.
  • the measurement station 1 includes a base 11, a vibration frame 13 supported on the base 11 by a plurality of springs 12, and a vibration frame 13. 13 Hold both ends C s 1 and C s 2 of the crank shaft C s arranged on the top of the shaft 3, and rotate the crank shaft C s synchronously with the crank shaft C s fixed at a fixed holding angle.
  • reference numeral 16a denotes a motor for synchronously rotating the pair of rotating body holding disks 14 and 14, and the rotation of the motor 16a is performed by the belt 16b and the vibration frame.
  • the rotating body gripping disks 14 and 14 are transmitted to the rotating body gripping disks 14 and 14 via the shaft 16 c and the belts 16 d and 16 d arranged in 13 and the two rotating body gripping disks 14 and 14 are It is rotated synchronously.
  • the motor 16a is mounted on the base 11 in the figure, it may be mounted on the vibration frame 13. If the motor 16a is mounted on the vibrating frame 13, the belt 16b straddling the base 11 and the vibrating frame 13 can be omitted. Is further improved.
  • the rotating body gripping disks 14 and 14 respectively hold a pair of drive heads 17 and 17 slidable in a direction parallel to the rotation axis C s X of the shaft C s on the vibration frame 13. It is rotatably supported on 17. By rotating the screw 17a attached between the vibration frame 13 and the drive head 17 to adjust the distance between the two drive heads 17 and 17, a pair of rotation The spacing between the body gripping disks 14 and 14 can be adjusted according to the size (length) of the crankshaft Cs to be measured.
  • the rotating body gripping disks 14 are at the stop position (the position in FIG. ), A pair of work receivers 14 a, 14 a supporting the shaft end C s 1 from below, and the shaft end C s with respect to these two work receivers 14 a, 14 a. 1 and are rotatable to open and close each other as shown by the solid line and dashed line in the figure.
  • the shaft ends between the work receivers 14a and 14a in the closed state shown by the solid line A pair of clamp arms 14b and 14b for holding and fixing the portion Cs1 are provided.
  • the two surfaces of the work receivers 14a and 14a that abut against the shaft end Cs1 are positioned at the time when the crankshaft Cs is fixed by gripping the shaft end Cs1.
  • the reference plane is set as the reference plane. The same applies to the vehicle end C s 2 side.
  • the mechanism for rotating and opening the clamp arms 14b, 14b as described above is not shown, but may be incorporated in the rotating body gripping disk 14, for example, or the drive head 1
  • the clamp arms 14b and 14b may be pivotally opened and closed via a transmission mechanism such as a cam by assembling them in the inside 7 or on the vibration frame 13.
  • the holding force by the clamp arms 14b and 14b may be a relatively small force, and the holding force may be generated by a spring.
  • crankshaft C s between the pair of rotating body gripping disks 14 and 14 it is possible to move up and down as shown by the black arrow in FIG. 2 and to show the white arrow in FIG. 4 (a).
  • the first crankpin Cs3 is defined so as to be located directly above the shaft end Cs1 (and the shaft end Cs2).
  • a pair of Lamp members 19 and 19 are arranged.
  • a push rod mechanism 18 for positioning and fixing the crankshaft Cs in the direction of the axis is arranged in one of the drive heads 17.
  • the push rod mechanism 18 includes a cylindrical sleeve 18 a slidably disposed in the axial direction of the crankshaft C s with respect to the drive head 17.
  • the rotating body gripping disk 1 is passed through the sleeve 18a and is rotatably held with respect to the sleeve 18a via flanges 18b and 18b provided before and after the sleeve 18a.
  • a push rod 18 c arranged coaxially with 4 and, although not shown, the sleeve 18 a is moved in the axial direction of the crankshaft C s with respect to the horse head 17. Moving means.
  • crankshaft Cs is gripped by the pair of rotating body gripping disks 14 and 14 at a fixed gripping angle. After being fixed, the pair of rotating body gripping disks 14 and 14 are rotated synchronously, and the state of displacement of the rotating shaft C s X and the inertia main shaft of the crankshaft C s is measured.
  • crankshaft Cs is brought into contact with the abutting surfaces of the workpiece supports 14a.
  • KC s so that the first crank pin C s 3 is located directly above the shaft end C s 1 (and the shaft end C s 2) as shown in FIG.
  • the grip angle is defined.
  • the sleeve 18a of the push rod mechanism 18 is advanced in the direction of the crankshaft Cs, and the tip of the push rod 18c is moved to one side.
  • the end face of the opposite shaft end C s 2 comes into contact with the reference surface 14 c provided on the other rotating body gripping disk 14, and the crankshaft C s is positioned in the direction of its axis and fixed in the same direction.
  • push rod 18 Is rotatably held with respect to the sleeve 18a as described above, and therefore does not hinder the rotation of the crankshaft Cs for measurement described later.
  • the motor 16a is driven, and the pair of rotating body gripping disks 14, 14 are synchronously rotated at a high speed.
  • the measured data shows the displacement between the rotation axis C s X of the crankshaft C s and the main axis of inertia in the same manner as before. Is required.
  • the vibration waveform measured using the vibration detector 15 with the rotation angle of the crankshaft Cs, the direction and distance of the displacement of the inertia main shaft with respect to the rotation axis CsX are determined. Is calculated.
  • This operation is also performed automatically by the control means 7, and the measurement result is stored in the control means 7.
  • crankshaft Cs for which the measurement has been completed is sent to the outer diameter measuring station 3 for measuring the outer diameters of both shaft end portions Cs1 and Cs2, which is the next step, by the conveying means 6. .
  • a new unprocessed crankshaft Cs is carried into the measuring station 1 from the supply unit 4 by the above-mentioned conveying means 6.
  • the outer diameter measuring station 3 includes a V block 31 on which the shaft end C s 1 of the crankshaft C s (the same applies to the shaft end C s 2) and a V block 3 1.
  • the two reference planes 31a and 31a are arranged in parallel with each other, and as shown by the white arrow in the figure, in a direction orthogonal to the reference planes 31a and 31a.
  • Two measuring plates 3 3, 3 3 that can be translated by the movement of the air cylinders 3, 3 2, and these two measuring plates 3 3, 3 3, and the reference surface 3 of the two surfaces of the V block 3 1
  • a pair of differential transformers 34.34 for measuring the distance from 1a and 31a is provided.
  • a pair of clamp members 35, 35 are provided above the V block 31, similarly to the above-described measuring station 1.
  • the clamp members 35, 35 are attached to the work blocks 14 a, 1 a in the previous measurement station 1 with respect to the two reference surfaces 31 a, 31 a of the V block 31. 4
  • the members are arranged so as to coincide with the positional relationship between the members 19 and 19.
  • the air cylinders 32, 32 are operated, and as shown by the two-dot chain line in the figure, the two measurement plates 33, 33 are moved to the shaft end C sl of the crankshaft C s.
  • the shaft end The diameter of the portion C s1 (and the shaft end C s2) in two directions with the above-mentioned two reference surfaces 31 a and 31 a as measurement standards is obtained.
  • This operation is also automatically performed by the control means 7, and the measurement result is stored in the control means 7.
  • crankshaft C s for which the measurement has been completed is sent again by the conveying means 6 to the next step, the aesthetic treatment section 2.
  • the next crankshaft Cs is carried into the outer diameter measuring station 3 by the above-mentioned carrying means 6.
  • a new unprocessed crankshaft Cs is also carried into the measuring station 1 from the supply unit 4 by the conveying means 6.
  • the machining station 2 has a pair of shaft ends Cs1 and Cs2 for holding and fixing both shaft ends Cs1 and Cs2 of the crankshaft Cs on the base 21.
  • Fixing means 22 and 22 are provided. The two fixing means 22 and 22 are respectively fixed on a pair of processing heads 20 and 20 arranged on the base 21.
  • each fixing means 22 includes a pair of work receivers 22 a and 22 a supporting the shaft end C s 1 from obliquely below.
  • the two work receivers 22a and 22a are disposed diagonally above and below the shaft end Cs1 so as to be pivotally openable and closable. , 22a for gripping and fixing the shaft end Cs1.
  • the two surfaces of the work receivers 2 2 a and 22 a that abut on the shaft end C s 1 are positioned at the time of gripping the shaft end C s 1 and fixing the crankshaft C s.
  • the reference plane is set as a reference. The same applies to the shaft end C s2 side.
  • Each work receiver 22a is a linear motion guide having a force mechanism, which is driven by a driving force transmitted from a servomotor 22b via a gearbox 22c and a shaft 22d.
  • a driving force transmitted from a servomotor 22b via a gearbox 22c and a shaft 22d.
  • 2 e it is possible to move in the direction shown by the black arrow in FIG. 7, whereby both shaft ends C s 1 and C s 2 are placed on each work receiver 22 a.
  • the gripping position of the crankshaft Cs thus set can be finely adjusted in a direction orthogonal to the axis thereof.
  • the left and right sides are synchronized in the direction indicated by the white arrow in FIG.
  • the grip angle of the crankshaft Cs is set to the same angle as the rotating body gripping disk 1.14 of the measuring station 1, that is, 1)
  • a push bar 22g for pressing in the direction of Cs2 is arranged.
  • the clamp arms 22b and 22b are opened and closed by the driving force from the hydraulic cylinders 22h and 22h, respectively, disposed behind them.
  • the clamp members 22 f and 22 f are the right clamps in FIG. 7 by the operation of the hydraulic cylinder 22 i arranged above them.
  • the member 22 f is pivotally opened and closed, and the left clamp member 22 f is pivotally opened and closed by a gear mechanism (not shown).
  • the push bar 22g is actuated by a hydraulic cylinder 22j, also located above it.
  • a center hole is formed at the end face of each of the two shaft ends C s 1, C s 2, and other holes are formed at the two shaft ends C s 1, C s 2.
  • Processing spindles 23a and 23a for processing are arranged.
  • the machining spindles 23a, 23a are rotationally driven by motors 23b, 23b disposed at the rear. Also, the above machining spindles 2 3 a, 2 3 & and motor 2 3 13,
  • 23 b is disposed on the machining head 20 so as to be able to move back and forth in a direction parallel to the rotation axis C s X of the crankshaft C s via the linear motion guides 23 c and 23 c.
  • the combination cutting tool 8 shown in FIG. 8 is attached to 3a.
  • Such a combination cutting tool 8 includes a drill 81 for machining a center hole, an outer diameter cutting tool 82 for turning the outer peripheral surface of the shaft end C s 1 to roughly cut the outer diameter of the shaft, and a shaft end.
  • This is a combination with an end face cutting tool 83 for turning the end face of C s 1 to adjust the axis length.
  • the machining spindle 23 a on the side of the shaft end C s2 is formed by turning the outer peripheral surface of the drill 81 for center hole processing and the shaft end C s 2 among the above.
  • both shaft end portions C s1 and C s 2 are formed by a single hole and the outer diameter of the shaft is roughly cut by the two combined cutting tools 8, and one shaft end portion C s 1 Is cut to adjust the axial length.
  • the crankshaft Cs in which the outer diameters of both shaft ends Cs1 and Cs2 are measured in the outer diameter measuring station 3 is described.
  • the gripping position of the crankshaft Cs is In order to make fine adjustments in the direction orthogonal to each other, the positions of the work receivers 22a are moved by a predetermined amount.
  • the machining center of the drill 81 for the center one-hole machining of the combined cutting tool 8 coincides with or is close to the center of inertia of the crankshaft Cs.
  • the position is moved.
  • crankshaft Cs is integrally formed by forging or forging, and the surface before processing is a rough surface with low dimensional accuracy. So usually, However, if the processing allowance is smaller than the planned thickness, depending on the degree of fine adjustment, even after finishing, So-called black scale may remain.
  • crankshaft CS It is best to measure all dimensions of the crankshaft CS before machining in order to prevent force and dark skin residue, but this would complicate the outside diameter measuring station 3 and increase the time required for measurement. And the productivity of the crankshaft Cs may decrease.
  • the thickness of the machining allowance of the outer peripheral surfaces of both shaft end portions Cs1 and Cs2 of the crankshaft Cs is set to be smaller than the thickness of the machining allowance of the other portions.
  • the measurement results obtained in the measurement station are used, and a large number of crankshafts Cs obtained in the subsequent process are corrected in the final unbalance correction.
  • the center of the unbalance distribution of the multiple crankshafts Cs may be moved to any position, particularly a position suitable for correcting the unbalance.
  • the position that can be corrected that is, the counterweight that can be drilled for correction is basically a crank pin (No. 1 Crank pin C s 1 and the last crank pin).
  • the clamp members 2 2 f and 2 2 f are rotated left and right synchronously as shown by the white arrow in FIG. 7, and the first crank pin C s 3 is sandwiched from the left and right.
  • the shaft C s rotates along the outer peripheral surfaces of the two shaft ends C s 1 and C s 2 abutting on the abutting surfaces of the respective lock receivers 22 a.
  • the push bar 22 g is operated, and its tip is brought into contact with the side of the counterweight Cs 5 of the second crankpin Cs 4, and the opposite side
  • the end face of the shaft end C s 2 comes into contact with the reference plane of the reference 22 k provided on the other fixing means 2, and the crankshaft C s is positioned in the direction of its axis, and in the same direction. Fixed.
  • a centering hole for centering is formed at a predetermined position at or near the center of inertia, which serves as a machining reference. Then, both shaft ends C s and C are formed by an outer diameter cutting byte 82. The outer peripheral surface of s 2 is turned to rough-cut the outer diameter of the shaft, and the end faces of both shaft ends C s KC s 2 are turned by the end face cutting tool 83 to adjust the shaft length. .
  • processing station 2 may be performed using cutting tools mounted on different processing spindles under conditions suitable for each cutting tool.
  • each processing is performed at a time using one combined cutting tool 8
  • the processing in the processing station 2 is not limited to the above three types, and other processing may be performed on the processing station 2.
  • the conveying means 6 After the processing is completed, when the conveying means 6 is operated again, the processed crankshaft Cs is conveyed to the take-out part 5, where it is taken out and sent to the next step. At the same time, the next crankshaft Cs is carried into the heating station 2 by the above-mentioned conveying means 6, and the next crankshaft Cs is carried into the outside diameter measuring station 3 and a new unprocessed work is performed. Is carried into the measuring station 1 from the supply unit 4, and the respective operations are performed in parallel at the respective stations 1 to 3.
  • the holding device of the heating station 2 includes a pair of workpiece receivers 22a and a pair of clamps. Member 22f is included. Both ends C s 1 and C s 2 (hereinafter referred to as “work W”) of the crankshaft are received from a diagonally lower position by a pair of work receivers 22 a when viewed in the axial direction, respectively. It is pressed and held from obliquely above by the clamp member 22f.
  • the work receiver 22a and the seating surface 222 of the holding device adopt the same configuration (the same configuration as the conventional one) as shown in FIG.
  • the claws 2 24 of the member 22 f that hold down the work W are formed as clamp claws 2 24 that make point contact with the surface of the work W when viewed in the axial direction of the work W.
  • Each holding device 2 includes a pair of work receivers 22a and a pair of clamp members 22f.
  • a seating surface 222 on which the workpiece W is seated is formed in each workpiece receiver 22a.
  • Each of the pair of seating surfaces 2 2 2 can receive the mark W from diagonally below.
  • Each of the pair of clamp members 22 f is provided with a clamp claw 224.
  • Each of the clamp claws 22 has a shape that makes point contact with the workpiece W when viewed in the axial direction of the workpiece W.
  • the clamp claw 22 When the clamp claw 22 is shaped so as to make point contact with the workpiece W when viewed in the axial direction of the workpiece W as described above, the clamp can be crimped even with a small clamping force. Claws 2 2 4 bite into the surface of Park W. Then, the work W is prevented from rotating by the torque.
  • FIGS. 11A and 11B are diagrams for explaining the configuration of the seating surface 222 and the clamp pawls 222, where A is a diagram viewed in the axial direction of the workpiece W, and B is a diagram viewed in a direction perpendicular to the axis of the workpiece W.
  • FIG. 11A when viewed in the axial direction of the work W, the clamp claws 222 have a shape that makes point contact with the surface of the work W.
  • the work W When viewed in the cross direction, the clamp claws 2 24 are in line contact with the workpiece W in the axial direction, as shown in FIG. 11B. If the clamp claw 2 2 4 is formed in such a shape, when the work W tries to rotate around the axis, it will be cramped. The claws 2 2 4 bite into the surface of the work W, and the rotation of the work W is reliably prevented.
  • FIGS. 12A, 12B, and 12C are all illustrative views showing modified examples of the clamp pawls 224.
  • 12A, 12B and 12C show a state where the clamp claw 224 is viewed in a direction perpendicular to the axial direction of the workpiece W.
  • Each of the clamp claws 224 shown in FIGS. 12A, B, and C has the same shape as the clamp claws 224 shown in FIG. 11A when viewed in the axial direction of the workpiece W.
  • the clamp claw 2 24 shown in FIG. 12A has an inverted triangular shape and has a sharp lower end.
  • the clamp claw is a claw protruding downward in an inverted triangular pyramid shape.
  • FIG. 12B shows a clamp claw 222 having a shape convexly curved so as to swell downward.
  • FIG. 12C shows the claws 224 in which the center portion in the width direction (axial direction of the workpiece W) projects downward in a rectangular shape.
  • Each of the clamp claws 2 2 4 makes line contact with the surface of the work in the axial direction of the work, so that the claws bite into the surface of the work W and rotate the work W in the same manner as the clamp claws 22 described in FIG. Is definitely blocked.
  • the shape of the clamp claw according to the present invention is not limited to the above-described embodiment. In short, any shape may be used as long as the clamp claw makes point contact with the work or linearly contacts the work in the axial direction.
  • the holding device in the measuring station 1 is also basically the same as the holding device in the machining station, and includes a workpiece holder 14a of 1f and a pair of clamp arms. 14b, and a pair of holding devices are provided to hold both ends of the work. .
  • each holding device includes a pair of peak receivers 1a and a pair of clamp arms 14b.
  • a seating surface 11 for seating the work W is formed on the work receiver 14a.
  • Each of the pair of seating surfaces 141 can receive the work W from obliquely below.
  • Each of the pair of clamp arms 14 b is provided with a clam claw 12.
  • Clamp ° Claw 14 2 is provided opposite to seating surface 14 1, and from the opposite side to the received portion so as to press work W received on seating surface 14 1 against seating surface 11 1 Hold down work W.
  • the clamp that generates the clamp claws 1 and 2 is the cramp in the station 2.
  • Claw 2 2 3 crump 'power is small compared to force.
  • the work W is received by the seating surface 141, and the work W is received.
  • the pressure W is pressed down from above and comes into contact with the seating surface 1 4 1. A trace of seating was made on the covered rough surface.
  • the work holder 150 that pressed the work W so as to make a trace of seating on the work W is then lifted upward. Therefore, the work holder 150 does not function when measuring the unbalance of the work.
  • a pre-processing station for performing pre-processing on the workpiece before the work unbalance is measured at the measuring station 1 may be provided.
  • the pretreatment station has a configuration similar to that described with reference to FIG. 13, but has a seating surface ( A holding device provided with 14 1) may be arranged, and the workpiece W may be held and strongly pressed by the workpiece presser (15) so that a large seating mark may be formed on the surface of the workpiece. The workpiece with a large seating mark is then sent to measuring station 1 and processing station 2 in sequence.
  • the seating surface 14 1 of the holding device at the measuring station is convexly curved with respect to the surface of the workpiece W: a curved surface that is curved in the surface direction (for example, in the axial direction of the workpiece W (perpendicular to the paper surface in FIG. 13)).
  • the seating surface (141) of the holding device in the pretreatment station is a flat surface, a large seating mark can be formed in the pretreatment station.
  • the seating surface (141) of the holding device of the pretreatment station is a concave curved surface substantially along the surface of the work W, the larger A seating mark can be made on the surface of the work W.
  • the clamp claws 14 2 in the measuring station 1 are illustrated as hardened flat claws, but the clamp claws 14 2 are not set as flat claws, and the clamp claws provided on the As in the case of 224, a clamp claw that makes point contact with the workpiece W or linearly contacts the workpiece W in the axial direction may be used. The crump of such shape. By using the claws, a clamp force required for measurement can be generated with a smaller clamping force.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Balance (AREA)
  • Jigs For Machine Tools (AREA)
  • Drilling And Boring (AREA)

Abstract

L'invention concerne une machine de centrage de masse comportant une unité de mesure et une unité d'usinage séparées l'une de l'autre. L'unité d'usinage comporte par ailleurs un dispositif de maintien pouvant exercer une force de maintien élevée de manière à bloquer une pièce contre la rotation lors de l'usinage de cette pièce, et dont les dimensions et le poids peuvent être réduits. Des mâchoires de serrage (224) entrant en contact ponctuel avec la pièce (W) ou en contact en ligne axialement avec la pièce (W) sont disposés sur le dispositif de maintien de l'unité d'usinage. Lesdites mâchoires de serrage (224) s'encastrent dans la pièce (W) afin de maintenir fixement la pièce (W) avec une force de serrage réduite de manière à bloquer la pièce (W) contre la rotation, même si la pièce (W) est soumise à une force de rotation.
PCT/JP2001/005682 2000-07-05 2001-07-02 Machine de centrage de masse WO2002003044A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000204077A JP3523573B2 (ja) 2000-07-05 2000-07-05 マスセンタリングマシン
JP2000-204077 2000-07-05

Publications (1)

Publication Number Publication Date
WO2002003044A1 true WO2002003044A1 (fr) 2002-01-10

Family

ID=18701402

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/005682 WO2002003044A1 (fr) 2000-07-05 2001-07-02 Machine de centrage de masse

Country Status (2)

Country Link
JP (1) JP3523573B2 (fr)
WO (1) WO2002003044A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115258659A (zh) * 2022-07-26 2022-11-01 江苏新美星包装机械股份有限公司 一种容器夹持装置

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009279734A (ja) * 2008-05-26 2009-12-03 Nagahama Seisakusho Ltd マスセンタリング加工装置
JP5296444B2 (ja) * 2008-07-30 2013-09-25 コマツＮｔｃ株式会社 クランクシャフトのセンタ穴加工装置及び加工方法
JP5461829B2 (ja) * 2008-12-11 2014-04-02 コマツＮｔｃ株式会社 センタリング装置
JP5954707B2 (ja) * 2012-09-13 2016-07-20 株式会社長浜製作所 質量中心測定機
JP5994184B2 (ja) * 2012-10-01 2016-09-21 株式会社長浜製作所 マスセンタリングマシンおよびロータ保持装置
KR101695003B1 (ko) * 2015-08-31 2017-01-23 양필성 마스트레일 가공용 지그

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5817306A (ja) * 1981-06-06 1983-02-01 カ−ル・シエンク・アクチエンゲゼルシヤフト 質量心出し機においてクランク軸の変位を制限するためのスイツチ
JPS61199336U (fr) * 1985-05-31 1986-12-13
US4852405A (en) * 1987-02-13 1989-08-01 Carl Schenck Ag Machine for mass-centering rotors
JPH06320376A (ja) * 1993-05-13 1994-11-22 Olympus Optical Co Ltd レンズの芯出し方法および装置
JPH09285927A (ja) * 1996-04-19 1997-11-04 Nippei Toyama Corp ワーククランプ装置
JP2000121479A (ja) * 1998-10-19 2000-04-28 Nagahama Seisakusho:Kk 回転体の質量心出し装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5817306A (ja) * 1981-06-06 1983-02-01 カ−ル・シエンク・アクチエンゲゼルシヤフト 質量心出し機においてクランク軸の変位を制限するためのスイツチ
JPS61199336U (fr) * 1985-05-31 1986-12-13
US4852405A (en) * 1987-02-13 1989-08-01 Carl Schenck Ag Machine for mass-centering rotors
JPH06320376A (ja) * 1993-05-13 1994-11-22 Olympus Optical Co Ltd レンズの芯出し方法および装置
JPH09285927A (ja) * 1996-04-19 1997-11-04 Nippei Toyama Corp ワーククランプ装置
JP2000121479A (ja) * 1998-10-19 2000-04-28 Nagahama Seisakusho:Kk 回転体の質量心出し装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115258659A (zh) * 2022-07-26 2022-11-01 江苏新美星包装机械股份有限公司 一种容器夹持装置
CN115258659B (zh) * 2022-07-26 2024-01-23 江苏新美星包装机械股份有限公司 一种容器夹持装置

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JP3523573B2 (ja) 2004-04-26

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