JP2005279785A - Machining method of inner peripheral surface of sludge hole of carriage for hard disk, backup tool and clamp tool for use in it, and machining device of inner peripheral surface of sludge hole of carriage for hard disk - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inner peripheral surface machining method, preventing the central part of inner peripheral surface of a sludge hole from being bulged inward by deburring using etchant or electrolyte to lower the fitting holding force of a head to the sludge hole. <P>SOLUTION: A backup material and a clamp material are disposed on the lower or upper side of a fin to thereby clamp and hold the fin, the inner peripheral surface of the sludge hole is machined with a machining tool, and unnecessary parts of the inner peripheral surface are removed to be flattened. Before clamping and holding the fin with the backup material and the clamp material, a centering material is inserted in the sludge hole to perform machining after centering with the machining tool. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a carriage (also referred to as “com”) of an actuator used for reading and writing of a hard disk device of an OA device or a portable device having a hard disk such as a personal computer. The present invention relates to a method for processing an inner peripheral surface of a sedge hole of a hard disk carriage, a backup tool and a clamp tool used therefor, and an inner peripheral surface processing apparatus for a sedge hole of a hard disk carriage .

  Various devices equipped with a hard disk are equipped with a read head and a write head. As shown in FIG. 11, the head A is attached to the distal end portion of the suspension D attached to the distal end portion of the fin C of the carriage B. The suspension D is attached by caulking to a sedge hole E (FIG. 10) opened at the tip of the fin C. As shown in FIG. 11, the carriage B is arranged beside the disks F stacked at intervals, and the head A is inserted between the disks F and is attached to the movable coil G attached to the rear end of the carriage B. When a current is applied, a voice coil motor (not shown) is driven to cause the carriage B to reciprocate in the horizontal direction in FIG. 11, and the head E crosses the rotating disk F. In FIG. 11, H is a disk clamp, I is a base, and J is a yoke (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 9-128911

OA devices equipped with a hard disk such as a personal computer are becoming smaller and thinner year by year. For this reason, the hard disk is also reduced in size and thickness, and accordingly, the interval between the disks F is reduced, and the carriage B is also reduced in size and thickness. As shown in FIG. 10, since the carriage B has a plurality of fins C formed at a constant interval, when the carriage B is made thinner, the interval between the plurality of fins C becomes narrower and the interval is required to be accurate. The Since the carriage B is made by machining (cutting, grinding, etc.) from an extruded material or die-cast material, burrs are generated on the carriage B and its fins C during processing. Since there are only a few gaps (several mm) between the plurality of disks F and the individual fins C approaching them, small burrs are also a problem.
Therefore, conventionally, deburring processing of the fin C is performed. This deburring process includes various methods such as manual deburring, deburring by etching, and electrolytic deburring. These deburring processes are selected and used in accordance with the work to be deburred, the deburring accuracy, and the like. Deburring by the etching process has a lack of deburring capability. Therefore, the deburring process is manually performed before the deburring process, and then the etching process is performed, which is a combination of the two processes. Electrolytic deburring has sufficient deburring capability, so that work alone is sufficient.

  In the case of deburring by the etching process, dripping occurs at the corners of the carriage by the etching solution, and in the case of deburring by the electrolytic deburring method, the electrolytic solution causes dripping. In particular, in the sedge hole E of the fin C, the upper and lower corner portions a and b are inclined as shown in FIG. 12B, and the intermediate portion c between the both corner portions a and b bulges inside the sedge hole E. It will be in the state. In this case, when the suspension D is attached to the sedge hole E by caulking, there is a problem that the holding force is reduced.

The invention and the inner peripheral surface machining method's Edge hole capable eliminate the bulging of the scan edge holes of the carriage for a hard disk, and the backup device and the clamping device used therein, the inner peripheral surface machining apparatus of the carriage for a hard disk Is to provide.

The method of processing the inner peripheral surface of the sedge hole of the carriage for hard disk of the present invention is as follows:
A hard disk carriage having two or more fins protruding in parallel at the tip of the base is formed by machining, and burrs generated on the carriage by the machining are etched and deburred. Are removed by the deburring process, etc., and the bulging part generated by the deburring process inside the peripheral edge of the fin sedge hole is removed and flattened, respectively. Back-up material is placed on the back or front side of the fin, and the openings such as holes and grooves are aligned with the sedge holes of each fin, and the clamp material is placed on the reverse side of each fin. to it apertured to have holes, aligning the opening of the groove or the like's edge holes of the fins, the respective fin holding clamping by the backup material and the clamping member The inner peripheral surface of the scan edge holes two or more fins in the form of its clamping holding processed by the processing tool, a processing method for planarizing to remove the bulge portion of the inner peripheral surface. In this case, before sandwiching and holding the fin between the backup material and the clamp material, insert a slender centering material into the sedge hole of two or more fins to center the sedge hole and the processing tool, and back up After pinching and holding the respective fins with the material and clamp material, the centering material is extracted, centered, and a processing tool is inserted into the sedge hole of two or more fins that are pinched and held with the backup material and clamp material Thus, the bulging portion can be removed and planarized. In any case, the inner peripheral surface of the sedge hole is made by making the inner diameter of the sedge hole before processing the inner peripheral surface smaller than the dimension after processing, and removing the bulging part by the deburring process and the processing tool. Is flattened and the inner diameter is set to a predetermined dimension.

The backup tool for processing the inner peripheral surface of the sedge hole of the hard disk carriage according to the present invention is the backup tool used in the method of processing the inner peripheral surface of the sedge hole of the hard disk carriage. The back-up materials are arranged at intervals, and the space between the back-up materials is wide enough to accommodate each fin of the carriage and the individual clamp material, and each back-up plate has openings such as holes and grooves that can be aligned with the fin sedge holes. A part is provided.

The clamping tool for processing the inner peripheral surface of the sedge hole of the hard disk carriage according to the present invention is a clamp tool used in the method of processing the inner peripheral surface of the sedge hole of the hard disk carriage. Arranged at intervals to allow each fin of the carriage and each backup material to enter , one end of the clamp material is fixed, the other end is free, and the fin edge edge is located at the free end of each clamp material Openings such as holes, grooves and the like that can be matched are formed, and when each clamp member is moved to the individual fin side by the driving body, the free end can be pressed against each fin, and when it is changed in the opposite direction, The pressure contact is released. In this case, the clamp member can be a spring plate.

An apparatus for processing an inner peripheral surface of a sedge hole of a hard disk carriage according to the present invention is formed with a table for setting a carriage for a hard disk, a carriage presser for fixing the carriage set on the table, and a gap between the carriages . A backup device with two or more backup materials that clamp and hold two or more fins individually, a clamp device with two or more clamp materials, a backup material for backup devices and a clamp material for clamp devices It is provided with a processing tool that is inserted into a sedge hole of a fin held and held to process the inner peripheral surface thereof. The two or more backup materials are arranged with an interval in which individual clamp materials and individual fins can be inserted, and each backup material has openings such as holes and grooves that can be aligned with the sedge holes of the fins. The two or more clamp members are provided at intervals to allow the individual backup members and individual fins to enter, and openings such as holes and grooves that can be aligned with the sedge holes of the fins in the respective clamp members. The part is formed. The two or more clamp members are fixed at one end and free at the other end, and free ends of the respective clamp members are formed with openings such as holes and grooves that can be aligned with the fin sedge holes. Each of the clamp members can be brought into pressure contact with each fin when the drive member is moved toward the individual fin side, and the pressure contact is released when moved in the opposite direction. The two or more clamp members can be used as spring plates.

The method for processing the inner peripheral surface of the sedge hole of the carriage for hard disk of the present invention has the following effects.
(1) Since the fins of the carriage are clamped and held by the backup material and the clamp and the inner peripheral surface of the sedge hole is processed with a processing tool, the fins are not deformed even if a plurality of fins are processed at once. .
(2) Before the fins are clamped and held between the backup material and the clamp material, the centering material is inserted into the sedge hole to center the sedge hole and the processing tool. Since the inner peripheral surface of the sedge hole is machined by inserting a plurality of fins, the inner peripheral surfaces of all the sedge holes are centered and processed even if a plurality of fins are processed simultaneously.
(3) Align the openings such as holes and grooves opened in the backup material and clamp material with the sedge hole, and then remove unnecessary parts on the inner peripheral surface of the sedge hole with the processing tool. Even if it is clamped and held by the backup material and the clamp material, they do not get in the way when processing the inner peripheral surface of the sedge hole.
(4) The inner diameter of the sedge hole before the inner peripheral surface treatment is made smaller than the dimension after the treatment, and the inner diameter of the sedge hole becomes a predetermined dimension by the deburring process and the removal of unnecessary parts by a processing tool. As a result, the inner diameter of the sedge hole does not become too large even if these treatments are performed.

The backup tool for processing the inner peripheral surface of the sedge hole of the hard disk carriage according to the present invention has holes, grooves and other openings that can be aligned with the fin sedge holes formed in a plurality of backup materials. Even if the backup material is applied to the fin, the backup material does not get in the way when the processing tool is inserted into the sedge hole, and the inner peripheral surface can be processed by inserting the processing tool into the sedge hole. it can.

The clamping tool for processing the inner peripheral surface of the sedge hole of the carriage for hard disk of the present invention has the following effects.
(1) One end of a plurality of clamp members is fixed and the other end is free, and an opening such as a hole or groove that can be aligned with a sedge hole of a fin is formed at the free end of each clamp member. Therefore, if you align them, even if the clamp material is applied to the fin, the backup material will not get in the way when inserting the processing tool into the sedge hole. The inner peripheral surface can be processed.
(2) Since the free end of each clamp material can be changed by the operating body, when inserting or removing the clamp material in the gap between the fins, the clamp material is positioned in the middle of the gap and clamped after insertion. Since the material can be changed by the operating body and the free end can be brought into pressure contact with the fin, it is easy to insert and remove the clamp material into the gap between the fins. In addition, the fins are securely held by the backup material.
(3) Since a plurality of clamp members are used as spring plates, the holding force of the fins with the backup member is further ensured by the spring force.

The apparatus for processing the inner peripheral surface of the sedge hole of the carriage for hard disk of the present invention has the following effects.
(1) Since there is a carriage guide, the carriage can be set by positioning the carriage on the carriage guide.
(2) Since there is a carriage pressing tool, the carriage set on the carriage guide can be pressed and stabilized.
(3) Since the fins of the carriage can be clamped and held by the backup material of the backup tool and the clamp material of the clamp tool, the fins are stable during machining of the inner peripheral surface of the sedge hole, and high-precision machining can be performed.

(Embodiment of the inner peripheral surface machining method of the present invention)
As shown in FIG. 1, the method of processing the inner peripheral surface of the sedge hole of the hard disk carriage according to the present invention includes inserting fin receiving blocks (backup materials) 2 under the fins 1 formed at regular intervals of the carriage. The clamp member 3 is disposed on the fin 1. In this case, as shown in FIGS. 2 and 3, the groove-shaped opening 4 formed in the backup material 2, the U-groove opening 5 formed in the clamp material 3, and the tip of the fin 1 are opened. The sedge hole 6 is aligned vertically, and a centering bar 7 is inserted into the sedge hole 6 from above to align (center) the sedge hole 6 core with the core of the processing tool 8 (FIG. 2). . Next, after holding the fin 1 between the backup material 2 and the clamp material 3, the centering bar 7 is extracted, and thereafter, the opening 4 of the backup material 2 and the opening of the clamp material 3 as shown in FIG. 2. The processing tool, for example, a reamer 8 is pushed into the portion 5 and the sedge hole 6 at the tip of the fin 1 while rotating, and the bulging portion 9 on the inner peripheral surface of the sedge hole 6 is cut or ground. The inner peripheral surface is processed into a flat surface. After completion of the processing, the holding of the fin 1 between the backup material 2 and the clamp material 3 is released, and then the backup material 2 and the clamp material 3 are removed from the gap between the fins 1. A tool other than the reamer can be used as the processing tool 8.

(Embodiment of the backup tool of the present invention)
An example of the backup tool of the present invention will be described with reference to FIG. In the backup tool shown in FIG. 4, a plurality of backup materials 2 are stacked at regular intervals with a spacer 10 interposed therebetween, and screws are screwed into the screw holes 11 at both ends of the backup material 2 so that the plurality of backup materials 2 are connected to the spacer 10. It is integrated. The interval is the same as or substantially the same as the interval between the upper and lower fins 1 to facilitate insertion between the fins 1. An opening 4 of an elongated U-shaped groove is formed in the center in the longitudinal direction of each backup material 2 so as to penetrate vertically. The opening 4 is disposed under the sedge hole 6 when the backup material 2 is applied to the bottom surface of the fin 1 as shown in FIG. The shape of the opening 4 may be a circular hole, an elliptical hole, or other shapes. On the lower bottom surface side of the opening 4 of the backup material 2, a recessed portion 13 that is recessed on the upper surface side is formed. As shown in FIG. 2, the concave portion 13 is used for discharging cutting pieces, grinding powder, and the like generated by processing the inner peripheral surface of the sedge hole 6 with a processing tool 8 as shown in FIG. It is.

(Embodiment 1 of the clamp device of the present invention)
The 1st example of the clamp tool of this invention is demonstrated based on FIG. The clamping tool shown in FIG. 5 is integrated by fixing the root side and the spacer 15 together with the spacers 15 sandwiched between the base sides of the plurality of clamp members 3 at a constant interval. The clamp member 3 is gradually tapered from the base side toward the tip side, and a horizontally long elliptical operation hole 16 is opened at a substantially central portion in the longitudinal direction, and a U-shaped groove-like opening portion 5 is opened at the tip side. ing. An operation body 19 is inserted into the operation hole 16. The rod 19 of the driving body 18 such as an air cylinder or a hydraulic cylinder is used for the operating body 19. When the operating body 19 is moved up and down by the driving body 18, the distal end side (free end) of the clamp member 3 moves up and down (up and down). Variable). The opening 5 is disposed on the sedge hole 6 when the clamp member 3 is applied to the upper surface of the fin 1 as shown in FIG. A spring plate is used for the clamp member 3 and its tip side is easily swung up and down as shown in FIG. By doing so, the front end side of the clamp member 3 is inserted on the fin 1 as shown in FIG. 6B, and then the operating body 19 is lowered by the drive body 18 to lower the front end side of the clamp member 3. When the tip side is pressed against the upper surface of the fin 1 as shown in FIG. 2, the tip side is pressed against the upper surface of the fin 1 by a spring force so that the fin 1 can be sandwiched and held between the backup material 2. The driving body 18 may be a motor or other than the air or hydraulic cylinder. The structure of the operating body 19 may have a structure or shape other than that illustrated.

(Embodiment 2 of the clamp device of the present invention)
The 2nd example of the clamp tool of this invention is demonstrated based on FIG. The clamp tool shown in FIG. 7 uses a spring plate for the clamp member 3, holds the clamp member 3 at a fixed interval by fixing the base side of the clamp member 3, and opens at the distal end side of the clamp member 3. 5 is the same as the clamp member 3 in FIG. 5, and the clamp members 3 are inserted one by one into the horizontally long holes of the box-shaped operating body 19 that is partitioned vertically by the partition plate 20. In this case, when the operating body 19 is moved up and down by a driving body (not shown), the distal end side (the right side in FIG. 7) of the clamp member 3 is moved up and down, and as shown in FIG. The fin 1 can be sandwiched and held therebetween.

(Embodiment 3 of the clamp device of the present invention)
A third example of the clamping tool of the present invention will be described with reference to FIG. 8 also uses a spring plate for the clamp member 3, holds the clamp member 3 at a fixed interval by fixing the base side, and has a guide on the tip side of the clamp member 3, etc. When the operation body 19 such as a round pipe or a round bar is arranged between the upper and lower clamp materials 3 and is moved up and down by a driving body (not shown), a plurality of clamp materials 3 are obtained. As shown in FIG. 2, the tip end side of the plate 1 is moved up and down so that the fin 1 can be sandwiched and held between the tip end side and the backup material 2.

  The shape of the clamp member 3 can be any other shape. The clamp member 3 is preferably a spring plate made of stainless steel, but may have other properties and materials. The shape of the guide formed on the distal end side of the clamp member 3 can also be a circular hole, an elliptical hole, or another shape.

In order to process the inner peripheral surface of the sedge hole using the backup tool of FIG. 4 and the clamp tool of FIG. 5, they are arranged as shown in FIGS. 6 (a) and 6 (b). In the state, do as follows.
1. 6A and 6B, the backup material 2 is inserted between the upper and lower fins 1 and applied to the bottom surface of the fin 1, and the clamp material 3 is inserted between the upper and lower fins 1 and arranged above the fins 1. In this case, the backup material 2 and the clamp material 3 are fixed, the fin 1 is rotated in the direction of the arrow in FIG. 6A, and the fin 1 is inserted between the backup material 2 and the clamp material 3.
2. By lowering the operating body 19 by operating the driving body 18, the clamp member 3 is lowered from the state shown in FIG. 6B to be substantially horizontal as shown in FIG. In this case, as shown in FIG. 3, the edge hole 6 of the fin 1 is aligned with the opening 4 of the backup material 2 and the opening 5 of the clamp material 3.
3. Next, as shown in FIG. 1, a centering bar 7 such as a round pipe or a round bar is inserted into the sedge hole 6, the opening 4 of the backup material 2 and the opening 5 of the clamp material 3 from above, and the sedge hole 6 is aligned (centered) with the core of the processing tool 8 of FIG.
4). After centering, the fins are clamped and held by the backup material 2 and the clamp material 3, and then the centering bar 7 is removed, and then the opening 4 of the backup material 2, the opening 5 of the clamp material 3, and the tip of the fin 1 The sedge hole 6 is pushed into the sedge hole 6 while rotating the processing tool 8 from above as shown in FIG. 3, and the bulging portion 9 (FIG. 2) on the inner peripheral surface of the sedge hole 6 is cut or ground. The inner peripheral surface is made flat.
5). After the completion of the processing, the holding of the fin 1 between the backup material 2 and the clamp material 3 is released, and then the backup material 2 and the clamp material 3 are removed from between the fins 1. In this case, the fin 1 is removed from between the backup material 2 and the clamp material 3 by rotating the fin 1 in the direction opposite to the arrow in FIG. That is, the backup material 2 and the clamp material 3 are removed from between the fins 1.

  In the processing, the inner peripheral surface processing apparatus for a sedge hole shown in FIG. 9 can be used. 9 includes a table 31 on which a carriage 30 is set, a carriage guide bar 32 erected on the upper surface of the table 31, and a carriage presser 33 that fixes the carriage 30 when processing the inner peripheral surface of the sedge hole. The inner peripheral surface of the sedge hole of the fin 1 clamped and held by the backup tool 34 and the clamp tool 35 holding the fin 1 of the carriage 30, the backup material 2 of the backup tool 34 and the clamp material 3 of the clamp tool 35 It is provided with a processing tool (not shown) for processing. The carriage guide bar 32 is a round bar having a slightly smaller diameter than the rotary bearing mounting hole 36 of the carriage 30 so that the rotary bearing mounting hole 36 can be covered from above. It can be slid somewhat in the direction of. The carriage presser 33 is for fixing the carriage 30 set on the carriage guide bar 32 from above and fixing it on the table 31, and is attached to a rod 38 of a pneumatic or hydraulic cylinder 37. 9 can be rotated in the direction of the arrow in FIG. 9 and can be moved up and down. When the carriage 30 is rotated upward after being lowered, the carriage 30 can be pressed against the table 31 and fixed, and is raised. And can be released. In FIG. 9, 39 is a frame, and 40 is a yoke attached to the rear end of the carriage 30.

The longitudinal cross-sectional view of centering description of a sedge hole in the inner peripheral surface processing method of the sedge hole of the carriage for hard disks of this invention. The longitudinal cross-sectional view at the time of the internal peripheral surface processing of the sedge hole by a processing tool in the internal peripheral surface processing method of the sedge hole of the carriage for hard disks of this invention. FIG. 3 is a perspective view of a state in which the three of a sedge hole, a backup material guide, and a clamp material guide are overlapped in the method of processing the inner peripheral surface of the sedge hole of the carriage for hard disk of the present invention. Explanatory drawing which shows an example of the backup tool of this invention. Explanatory drawing which shows the 1st example of the clamp tool of this invention. (A) is a schematic plan view which shows arrangement | positioning of the backup material of this invention, a clamp material, and a carriage, (b) is a schematic side view of (a). Explanatory drawing which shows the 2nd example of the clamp tool of this invention. Explanatory drawing which shows the 3rd example of the clamp tool of this invention. The perspective view which shows an example of the internal peripheral surface processing apparatus of a sedge hole. The perspective view which shows an example of a carriage. The perspective view which shows the arrangement | positioning relationship between the head of a carriage, and a hard disk. (A) is a perspective view of the sedge hole portion of the carriage, (b) is a sectional view taken along line XX of (a), and (c) is a bulging portion obtained by processing the inner peripheral surface of the sedge hole of (b). Explanatory drawing of the state which removed and planarized.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fin 2 Backup material 3 Clamp material 4 Opening part of backup material 5 Clamping material opening part 6 Sedge hole 7 Centering bar 8 Processing tool 9 Expansion part 10 Spacer 11 Screw hole 13 Recessed part 15 Spacer 16 Operation hole 18 Drive Body 19 Operating body 20 Partition plate 30 Carriage 31 Table 32 Carriage guide bar 33 Carriage presser 34 Backup tool 35 Clamp tool 36 Mounting hole 37 Cylinder 38 Rod 39 Frame 40 Yoke

Claims (9)

  This is a method of processing the inner peripheral surface of the sedge hole of the fin of the carriage that has been deburred. The backup material is placed under or on the fin and the clamp material is placed on the opposite side, and the fin is sandwiched between the backup material and the clamp material. A method for machining an inner peripheral surface of a sedge hole, characterized in that the inner peripheral surface of the sedge hole is processed with a processing tool, and unnecessary portions of the inner peripheral surface are removed and planarized.   2. The method of machining an inner peripheral surface of a sedge hole according to claim 1, wherein a centering material is inserted into the sedge hole before the fin is sandwiched and held between the backup material and the clamp material. And then pinch and hold the fins with the back-up material and clamp material, then remove the centering material, insert a processing tool into the sedge hole, and remove the unnecessary part of the inner peripheral surface of the sedge hole to flatten it. A method for processing an inner peripheral surface of a sedge hole.   3. A method for processing an inner peripheral surface of a sedge hole according to claim 1 or 2, wherein an opening such as a hole or groove opened in a backup material and a clamp material for sandwiching and holding the fin is used as a sedge hole of the fin. It is characterized in that the inner peripheral surface of the sedge hole is flattened by aligning and removing unnecessary portions of the inner peripheral surface of the sedge hole by inserting a processing tool into the opening and the sedge hole. The inner peripheral surface processing method of the sedge hole.   In the inner peripheral surface processing method of a sedge hole in any one of Claim 1 thru | or 3, the inner diameter of the sedge hole before an inner peripheral surface process is made smaller than the dimension after a process, a deburring process, A method for processing an inner peripheral surface of a sedge hole, wherein the inner peripheral surface of the sedge hole is planarized and an inner diameter is set to a predetermined dimension by removing unnecessary portions with a processing tool.   A plurality of backup materials are arranged at the same or substantially the same interval between the fins of the carriage, and each backup plate is provided with openings such as holes and grooves that can be aligned with the sedge holes of the fins. A backup tool for machining the inner peripheral surface of a sedge hole.   A plurality of clamp members are arranged at the same interval or substantially the same interval as the interval between the fins of the carriage, and one end of each clamp member is fixed and the other end is free, and a fin is attached to the free end of each clamp member. Openings such as holes and grooves that can be aligned with the sedge holes are formed, and when each clamp member is changed by the driving body, the free end can be pressed against the fin, and when changed in the opposite direction, the pressure contact is made. Clamping tool for machining inner peripheral surface of sedge hole, characterized in that is released.   7. The clamp tool for machining the inner peripheral surface of a sedge hole according to claim 6, wherein the clamp member is a spring plate.   A table for setting the carriage, a carriage presser for fixing the carriage set on the table, a backup tool and a clamp tool for holding and holding the fins of the carriage, and a fin set held by the backup tool and the clamp tool. A device for processing an inner peripheral surface of a sedge hole, comprising a processing tool for processing the inner peripheral surface of an edge hole. The inner peripheral surface machining apparatus for a sedge hole according to claim 8, wherein the backup tool is the backup tool according to claim 5, and the clamp tool is the clamp tool according to claim 6 or 7. Sedge hole inner peripheral surface processing equipment.

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