JP2006192464A - Die changing device of spinning machine, and spinning machine having the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a die changing device which can shorten the time necessary for the die changing work in a vertical spinning machine and can secure the safety. <P>SOLUTION: A driving member is provided on a part of the body of the vertical spinning machine so as to turn and move in the direction parallel to the main spindle of the spinning machine. The driving member is provided with two stage or one stage swing arms and a die receiving rest fixed to the end portion of the swing arms, and carries the die to and from the main spindle of the spinning machine. The driving member may be a hydraulic or pneumatic cylinder which can turn and slide by being fitted on a piston rod or may be a ball screw and a mating ball nut case. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a die changer for quickly and safely changing a die of a spinning machine used for spinning (flow forming) a forged or cast light alloy vehicle wheel.

As for the mold used for the spinning machine for light alloy wheels for vehicles, even with a 17 ″ diameter wheel, the upper and lower or left and right mold sets are over 300 kg. Recently, the mold weight is increasing with the increase in size of the wheel. As shown in FIG. 12, in the case of a conventional vertical spinning machine 109, a mold exchanging carriage provided with wheels 108 for carrying molds 101a and 101b on a mold table 102 having rollers and carrying the mold table. 105 is moved to a predetermined position on a rail 107 attached to the floor in front of the spinning machine, and then the mold base 102 is moved to carry the mold onto the main spindle 110 of the spinning machine. The height of the guide rail 103 is adjusted by an elevating device 106 that adjusts the height of the guide rail 103, and a mold is attached to the main spindle of the spinning machine, so that the floor area occupied by the entire device becomes considerably large. The replacement work is uniform, for example, it is possible to adjust the position of the mold in the guide rail direction, but it is difficult to adjust the position in the left-right direction. The following patent documents can be cited as the technology.
Japanese Patent Laid-Open No. 3-52727 JP-A-7-237269

  The problem to be solved is that the die change cart has a risk of overloading when the die is attached to the spindle of the spinning machine, and the cart may fall over. In addition, it requires a lot of storage space, and it takes time to move a heavy truck. Also, the combination of guide rollers and guide rails that support the mold base lacks precision, and it takes time to align the mold center with the center of the spinning machine spindle. As a result, it takes about 30 minutes to replace the upper and lower molds. It took time. In the present invention, it is a problem to solve the problem of the space for storing the carriage, the problem of the accuracy of the exchange device, and the problem of the longer mold exchange time.

  The mold exchanging apparatus of the present invention is a mold exchanging apparatus for a vertical spinning machine, a drive member movable in a direction parallel to the main axis of the spinning machine, and a pivotable support supported by the drive member. And a mold cradle provided at an end of the swing arm, and a fixed side of the drive member is fixed to a part of the spinning machine body, and the mold cradle The mold placed on the machine can be freely transferred (in / out) to three-dimensional positions such as up / down / left / right and depth between the spindle position of the spinning machine and the outside position of the machine. Since the apparatus is fixed to the main body of the spinning machine, tilting does not occur when a heavy metal mold is conveyed, and positioning becomes easy. The cylinder itself fitted to the fixed piston shaft rotates and moves up and down, and the exclusive area of the entire apparatus can be reduced.

  The cylinder is provided with a two-stage or one-stage pivotable swing arm that is compactly supported so that the entire swing arm can be moved up and down, and the mold can be freely rotated on the mold receiving portion. Like that. Even if the swing arm has one stage, there is no practical problem. However, in order to easily match the center of the mold with the spindle center of the spinning machine, it is better to have two stages. Since the mold can be moved in a plane and three-dimensionally in this way, it can be accurately transported on the spinning machine shaft, and the mold itself can be freely rotated. Therefore, the bolt hole of the mold clamper and the spindle side of the spinning machine Positioning with bolts is easy and quick work is possible. In the present invention, the spinning arm can be stored compactly in close contact with the frame of the spinning machine main body during normal operation, so that the space can be saved greatly.

  The invention of claim 2 is a specific configuration of the mold exchanging device, and the shape of each element is not particularly limited. However, as an example, referring to FIGS. 3 and 4, the spinning machine main body 1 has a first fulcrum. A bracket 8 is fixed, and a hydraulic / pneumatic cylinder 12 is slidably provided and pivoted about a first fulcrum shaft 10 fixed to the first fulcrum bracket, and fixed to the hydraulic / pneumatic cylinder. The first swing arm 14, the second fulcrum shaft 15 pivotally supported via ball bearings 16 a and 16 b provided on the first swing arm, and the second fulcrum shaft so as to be rotatable. A second swing arm 17 that is pivotally supported, and a bearing that holds the lower mold 4a and / or the upper mold 4b on a mold cradle 18 provided on the second swing arm and rotates it in a horizontal plane; Roller or multiple rotation Comprising a mold rotating apparatus using a ball, characterized by conveying to support the mold with the mold pedestal. Since the first fulcrum shaft is a piston shaft, and the cylinder fitted to the first fulcrum shaft can rotate and move up and down, the first swing arm attached to the first fulcrum shaft rotates about the piston shaft. Simplify. The mold placed on the mold cradle 18 can be finely adjusted manually at a position close to the main spindle of the spinning machine.

  In the invention of claim 3, similarly, referring to FIG. 3, the second swing arm 17 having the mold cradle 18 is attached to the hydraulic / pneumatic cylinder 12 in an offset manner. There are two offset positions, one is that the swing arm is set at a position higher than the cylinder, and the other is the first that pivotally supports the first fulcrum shaft 10 and the second swing arm. The two fulcrum shafts 15 are set with an inter-axis distance. The hydraulic / pneumatic cylinder as the driving member and the first fulcrum shaft are preferably located close to the main shaft of the spinning machine, but the front surface of the main shaft of the spinning machine is opened and is a working space, and the driving member is located in the lower part of the machine. It is necessary to attach. The height at which the mold is attached to the main shaft is higher than the driving member, and the second swing arm 17 having the mold receiving base is inevitably swung at a position higher than the driving member, thereby The advantage of reducing the travel distance arises. In addition, the second fulcrum shaft that pivotally supports the second swing arm and the first fulcrum shaft that fits into the cylinder have an inter-axis distance, and the second fulcrum shaft is equivalent to an arm joint when compared to a person. This has the advantage that the parallel distance between the axis of the drive member and the main axis of the spinning machine can be freely adjusted.

  According to a fourth aspect of the present invention, the second swing arm 17 is directly fixed to the hydraulic / pneumatic cylinder 12 fitted to the first fulcrum shaft 10 without using the first swing arm 14 to rotate and slide. It is characterized by being mounted movably, and the mold exchanging operation is simplified by setting the rotation radius of the second swing arm in advance so as to be positioned on the spindle axis of the spinning machine. The mold is capable of circular movement and vertical movement, and the apparatus becomes simpler.

  According to the fifth aspect of the present invention, the first swing arm 14 is omitted or a member that supports the second swing arm is provided to omit the second fulcrum shaft, and the second swing arm 17 is fitted to the first fulcrum shaft 10. It is directly fixed to the installed hydraulic / pneumatic cylinder 12 and is attached to be freely rotatable and vertically movable. Further, a sliding portion is provided in a part of the second swing arm 17 to reduce the length L of the arm. Since the distance between the first fulcrum shaft and the mold can be freely adjusted, the radius when rotating the mold can be reduced and the exclusive area can be reduced. .

  According to a sixth aspect of the present invention, a part of the mold cradle is configured to be separable, and the mold cradle is expanded and inserted below the mold. The entire periphery of the mold can be supported, resulting in a safer configuration. When correcting the phase of the mold pattern on the spindle of the spinning machine, the mold can be freely rotated even if the correction width is large.

  According to a seventh aspect of the present invention, the drive member comprises the cylinder fixed to the main body of the spinning machine, and a first fulcrum shaft that is fitted to the cylinder and is pivotally supported so as to be rotatable and slidable. It is characterized in that one or two swing arms are attached to the fulcrum shaft. When only the second swing arm is used, the offset position of the second swing arm can be simply adjusted by extending the first fulcrum shaft. There is an advantage that can be set. The device is simplified and the area occupied is small.

  In the invention of claim 8, the swing arm is attached to a housing containing a ball screw rotating by an electric motor and a ball screw nut fitted to the ball screw, and the swing arm is moved in the axial direction of the ball screw by the rotation of the electric motor. The housing is used in place of a hydraulic / pneumatic cylinder, and a fulcrum shaft of a swing arm is provided at an offset position of the housing. Equipment is simplified because no hydraulic / pneumatic pressure is used. The casing has a cylindrical or semi-cylindrical portion that accommodates the ball screw nut, so that the swing arm can be rotated over a wide range. When the ball screw is stopped and the nut is rotated, the swing arm moves in the direction of the screw axis by an amount corresponding to the lead angle of the ball screw. However, when the mold is attached to the main shaft, the ball screw is rotated to adjust the height. I do.

  The invention according to claim 8 is equipped with a mold exchanging device, so that the mold exchanging time can be shortened and a spinning machine with good work efficiency can be provided.

  According to the present invention, particularly when a light alloy wheel is manufactured by a forging method, it is easy to replace a mold exceeding 300 kg, and it is possible to reduce the time and safety of the worker and reduce the time for replacement. This will greatly contribute to the layout of the factory.

  A vertical driving unit by hydraulic / pneumatic pressure or a driving unit using a ball screw and nut driven by an electric motor is fixed to a part of the wall surface of the vertical spinning machine, and a swing arm is arranged on the driving unit. A mold cradle for holding the mold was provided to transport the mold to a three-dimensional position, thereby simplifying the mold replacement process. Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a front view for explaining the configuration of a vertical spinning machine 1. A mold exchanging device 2 according to the present invention is attached to the left or right frame of a spinning machine main shaft 3. Installed on. The molds that need to be replaced are the lower mold 4a attached to the main shaft and the upper mold 4b of the driven shaft (upper). There are a method of superimposing the dies 4a and 4b and simultaneously taking them out from the main spindle of the spinning machine, and a method of replacing the dies 4a and 4b one by one. FIG. 2 is a plan view of the spinning machine to which the die changer 2 of the present invention is attached, and is a cross-sectional view taken along the line AA of FIG. In this figure, a spinning machine including three spinning rollers 5a, 5b, and 5c is shown, but the number of rollers is not related to the present invention. This figure shows a position where the second swing arm 6 of the mold exchanging device 2 is placed at the center of the main spindle 3 of the spinning machine and the molds 4 a and 4 b are moved to the main spindle 3. The second swing arm 6 and the mold cradle 7 drawn with chain lines indicate the standby of this apparatus or the old and new loading positions of the mold. Of course, this loading position is not limited to this position, and any position within the locus of the second swing arm 6 outside the machine is possible. The mold removed from the spinning machine spindle 3 is removed from the mold cradle 7 by swinging the swing arm 6 outside the machine and then lifting the mold upward with a crane or the like (not shown). Next, a new mold is placed on the mold cradle 7 with a crane or the like, and the swing arm 6 is swung to be moved into the spinning machine.

  Fig.3 (a) is explanatory drawing which shows the longitudinal cross-section of the metal mold | die exchange apparatus 2 provided with the two-step swing arm which shows an example of this invention. The first fulcrum bracket 8 is firmly fixed to the spinning machine 1 with mounting bolts 9. A first fulcrum shaft 10 is fixed to the first fulcrum bracket 8, and hydraulic / pneumatic pipes 11a and 11b are connected to both ends of the shaft. A hydraulic / pneumatic cylinder 12 is assembled to the first fulcrum shaft 10 so as to rotate about the first fulcrum shaft and slide in the axial direction. A first swing arm 14 is fixed to the cylinder 12 with a bolt 13, and a second fulcrum shaft 15 is rotatably supported on the arm via ball bearings 16 a and 16 b. A second swing arm 17 is fixed to one end of the second fulcrum shaft 15, and a substantially semi-annular mold cradle 18 is integrally attached to the tip of this arm, and the mold cradle A ball 19 configured so as to be able to rotate at a fixed position is inserted into the ball 19. Since the molds 4a and 4b are placed on the balls, the mold can be easily rotated manually. A portion surrounded by a chain line of the ball 19 is shown in an enlarged view in FIG. In this embodiment, a self-rotating ball is used, but a roller provided with a rotating shaft, a ball bearing supported by a shaft, or the like is used, and a resin plate having a low friction coefficient may be used. In the middle of conveying the mold, the mold cradle 18 has a substantially semi-annular shape. Therefore, in order to prevent the mold from dropping, the mold is temporarily fixed using a bolt 29.

  FIG. 4 is a plan view of the mold exchanging device 2 shown in FIG. 3, and the same reference numerals are used. A portion indicated by a chain line indicates a case where the first and second swing arms are rotated.

  Here, details of the structure of the hydraulic / pneumatic cylinder 12 will be described with reference to FIG. FIG. 5A shows a cross section of the cylinder, and hydraulic / pneumatic pipes 11a and 11b extending from a hydraulic / pneumatic pressure source (not shown) are connected to the first fulcrum shaft 10, and the hydraulic / pneumatic pressure leading to this is connected. Paths 20a and 20b are provided. The piston 21 is integrally formed at the center of the first fulcrum shaft 10, and a packing 22 is mounted on the outer periphery thereof. In FIG. 6A, pressurized hydraulic / pneumatic pressure is supplied from the hydraulic / pneumatic pipe 11a side, and the cylinder 12 moves to the right in the figure by filling the cylinder chamber 12a. The oil / air in the cylinder chamber 12b flows back to the hydraulic / pneumatic pressure source tank through the hydraulic / pneumatic pipe 11b. FIG. 5B shows a state opposite to that in FIG. 5A, and the cylinder 12 is supplied with the pressurized hydraulic / pneumatic pressure to fill the cylinder chamber 12b, so that the cylinder 12 moves to the left in the figure. Move to. The oil / air in the cylinder chamber 12a circulates to the hydraulic / pneumatic source tank through the hydraulic / pneumatic pipe 11a. In this way, the cylinder 12 can be moved both in the axial direction of the first fulcrum shaft 10. Further, the cylinder 12 can be stopped at an arbitrary position by controlling the flow rate of hydraulic pressure / pneumatic pressure, and the first swing arm and the second swing arm connected to the cylinder 12 and the mold held at the end thereof. 4a and 4b can be moved to any axial position of the first fulcrum shaft 10. When the mold is placed on the mold cradle, an uneven load is applied to the cylinder 12, and bearing units 28a and 28b are attached to the ends of the cylinder so as to withstand the uneven load.

  An example of another drive member using an electric motor instead of a cylinder using hydraulic pressure / pneumatic pressure as a drive member of the mold exchanging device is shown in FIG. A ball screw nut 25 is engaged with a ball screw 24 attached to the reduction motor 23, and the nut 25 is attached to a nut box 26 (a casing). One end of the ball screw 24 is connected to a reduction motor and is pivotally supported by a ball bearing. The other end is also supported by a ball bearing 26, and this bearing 26 is integrated with the first fulcrum bracket 8. It is being fixed to the bearing box 27 attached to. The nut box 26 corresponds to the hydraulic / pneumatic cylinder 12 described above. By controlling the rotational direction and the rotational speed of the reduction motor 23, the nut box 26 can be moved by an arbitrary amount in the left and right directions in the figure. The fixed first swing arm 14 or second swing arm 17 can freely rotate. The mold cradle 18 attached to the second swing arm is moved in the axial direction of the ball screw 24. In reality, since the axis of the ball screw is attached in the vertical direction, it can also be rotated in the horizontal direction. In this embodiment, an example in which a ball screw is used has been shown. However, a normal feed screw can be used instead of the ball screw. In addition, it is advantageous for high-accuracy positioning that the deceleration motor is equipped with a brake or that a servo motor is used.

  A configuration in which the length of the arm is made variable instead of pivoting the above-described second swing arm with the first swing arm will be described. In this embodiment, a configuration in which the cylinder 12 using hydraulic pressure / pneumatic pressure is fixed to the main body of the spinning machine 1 and the first fulcrum shaft 10 is moved in the axial direction is used. FIG. 7A is a plan view of the mold exchanging apparatus 2a of the present embodiment. The first fulcrum bracket 8 a is fixed to the main body of the spinning machine 1. A cylinder 12 is fixed to the first fulcrum bracket, and a first fulcrum shaft 10 is supported by the cylinder so as to be movable in the axial direction. A swing arm 30 is fixed to the first fulcrum shaft 10, and a sliding arm 31 is fitted on one end of the swing arm 30, and a mold cradle 18 is attached to the end of the sliding arm. The mold pedestal has the same structure as described above, and includes a ball 19 so that the mold can be easily finely rotated. Since the mold cradle 18 rotates about the first fulcrum shaft 10 that can move in the axial direction and the sliding arm 30 can freely change the length L of the arm, the mold can be placed on the spindle of the spinning machine 1. Can be easily set. In the middle of conveying the mold, the mold is temporarily fixed with a bolt 29 to prevent the fall.

  The support structure of the sliding arm 31 in FIG. 7A is shown in the AA sectional view of FIG. 7B and the BB sectional view of FIG. A recess 32 is provided at the tip of the swing arm 30, and the lid member 33 is fixed to the swing arm 30 by a support bolt 34 of the bearing 35 and other fixing bolts (not shown). 35 is a ball bearing, and 36 is a slide bearing. Reference numeral 37 denotes a bolt insertion hole for fixing the lid member 33 to the swing arm. The length L of the sliding arm 31 supported by these bearings can be manually adjusted, and the position of the mold can be changed.

  FIG. 8 is a side view of FIG. 7 (a), and shows how the mold 4 a is mounted on the main shaft 3 of the spinning machine 1. The numbers used in the explanation of FIG.

  In this embodiment, a configuration in which only the second swing arm is used without using the first swing arm shown in the first embodiment will be described. FIG. 9 shows a plan view of the mold exchanging device 2b. The first fulcrum bracket 8 a is fixed to the main body of the spinning machine 1. A cylinder 12 is fixed to the first fulcrum bracket, and a first fulcrum shaft 10 is pivotally supported by the cylinder so as to be rotatable and movable in the axial direction. A swing arm 40 is fixed to the first fulcrum shaft 10, and a mold cradle 41 is attached to the end of the swing arm. The mold cradle 41 has a substantially semicircular ring shape with a part thereof divided, and includes a mold cradle 41 a fixed to the swing arm 40 and a mold cradle 41 b that can be expanded via a hinge 42. During the mold conveyance, the mold receiving base 41 b is temporarily fixed to the swing arm 40 by the bolt 43 in order to prevent the mold from dropping. After the center of the mold is matched with the center of the spinning machine spindle, the swing arm 40 is lowered and the mold is fitted to the spinning machine spindle. Thereafter, the bolts 43 are removed, the mold cradle 41b is expanded, and the swing arm 40 is swung out of the spinning machine. A position indicated by a chain line indicates a position where the swing arm and the mold cradle are rotated for exchanging or storing the mold. In the present embodiment, the distance between the centers of the first fulcrum shaft 10 and the mold cradle 41 is constant, and the center of the main shaft of the spinning machine needs to be positioned on the radius of rotation. Since this apparatus has few components, it is suitable for cost reduction, but the turning radius becomes large.

  FIG. 10 is a side view of the mold exchanging device 2b shown in FIG. 9, and the same reference numerals are used. A state in which the swing arm 40 conveys the mold 4a onto the main shaft 3 of the spinning machine 1 is shown.

  FIG. 11 is a side view of a mold exchanging apparatus 2c showing another configuration of the mold exchanging apparatus shown in FIG. 3 in the first embodiment. The cylinder 45 is formed integrally with a bracket and is fixed to the main body of the spinning machine 1. Brackets 46a and 46b are attached to the end of the first fulcrum shaft 10 that can be fitted to the cylinder 45 and can rotate and slide in the axial direction, and the first swing arm 14a is fixed to the bracket. The place where the mold cradle is provided at the end of the second swing arm 17 that is pivotally supported by the second fulcrum shaft 15 is the same as that of the first embodiment, and therefore detailed description thereof is omitted.

  Since the vertical spinning machine is equipped with a shaft for attaching the mold up and down, the ceiling of the machine is blocked, so a crane or the like that hangs the mold cannot be used. When the upper and lower molds are combined, the mold becomes about 300 kg, and a mold changing device attached to the machine main body that transports the mold to a deep position is indispensable.

It is a front view of the spinning machine which attached the metal mold | die exchange apparatus of this invention. Example 1 It is AA arrow sectional drawing of FIG. Example 1 (A) The figure is sectional drawing which shows an example of the metal mold | die exchange apparatus of this invention, (b) A figure is a partially expanded view. Example 1 It is a top view of the metal mold | die exchange apparatus shown in FIG. Example 1 (A) The figure is sectional drawing which shows the structure of the cylinder used for the metal mold | die exchange apparatus of this invention, (b) The figure is sectional drawing which shows the different operation | movement state of the cylinder. Example 1 It is a partial cross section figure which shows another drive source of a metal mold | die exchange apparatus. (Example 2) (A) is a plan view of a mold exchanging device having a different configuration of the present invention, (b) is a cross-sectional view taken along the line AA, and (c) is a cross-sectional view taken along the line BB. (Example 3) It is a side view of the metal mold | die exchange apparatus shown in FIG. (Example 3) It is a top view of the metal mold | die exchange apparatus from which the structure of this invention differs. Example 4 It is a side view of the metal mold | die exchange apparatus shown in FIG. Example 4 It is a side view of the metal mold | die exchange apparatus from which the structure of this invention differs. (Example 5) It is a side view of the conventional metal mold | die exchange apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Spinning machine 2 Mold changer 3 Spinning machine spindle 4 Mold 5 Spinning roller 6 Second swing arm 7 Mold cradle 8 First fulcrum bracket 9 Spoke
10 First fulcrum shaft
12 cylinders
14 First swing arm
15 Second fulcrum shaft
17 Second swing arm
18 Mold stand
23 Reduction motor
24 Ball screw
25 Ball screw nut
31 Sliding arm
40 Swing arm
41 Mold stand

Claims (9)

A die changer for a vertical spinning machine,
A drive member movable in a direction parallel to the main axis of the spinning machine;
One or two swing swing arms pivotally supported by the drive member;
A mold cradle provided at the end of the swing arm,
The fixed side of the driving member is fixed to a part of the main body of the spinning machine, and the mold placed on the mold cradle can be freely positioned in a three-dimensional position between the spindle position of the spinning machine and the outside position of the machine. A mold exchanging device characterized in that it is conveyed to As means for freely moving the mold cradle to the three-dimensional position,
A first fulcrum bracket is fixed to the spinning machine main body, and a hydraulic / pneumatic cylinder is provided so as to be freely rotatable and slidable around a first fulcrum shaft fixed to the first fulcrum bracket. A first swing arm fixed to the hydraulic / pneumatic cylinder, a second fulcrum shaft pivotally supported via a ball bearing provided on the first swing arm, and the second fulcrum A second swing arm that is pivotally supported by a shaft and a mold cradle provided on the second swing arm hold the lower mold and / or the upper mold and can be rotated in a horizontal plane. 2. The die changer for a spinning machine according to claim 1, further comprising: a die rotating device that supports the die and supporting and transporting the die using the die cradle.   3. The mold change of the spinning machine according to claim 1, wherein the second swing arm provided with the mold cradle is mounted offset with respect to the hydraulic / pneumatic cylinder. apparatus.   The second swing arm is directly fixed to a hydraulic / pneumatic cylinder fitted to a first fulcrum shaft without using the first swing arm, and is attached rotatably and slidable. Item 4. A mold changing apparatus for a spinning machine according to any one of Items 1 or 3.   5. The structure according to claim 1, wherein the second fulcrum shaft is omitted, and a sliding portion is provided in a part of the second swing arm so that the length L of the arm can be expanded and contracted. Mold changer for spinning machine.   The spinning according to any one of claims 1 to 5, wherein a part of the mold cradle is configured to be separable, and the mold cradle is expanded and inserted below the mold. Machine die changer.   The driving member includes the cylinder fixed to the main body of the spinning machine, and a first fulcrum shaft that is fitted to the cylinder and supported so as to be rotatable and slidable. The mold exchanging apparatus according to any one of claims 1, 3, 5 and 6, wherein said swing arm is attached.   The drive member comprises a housing containing a ball screw rotating by an electric motor and a ball screw nut fitted to the ball screw, a swing arm is attached to the housing, and the swing arm is moved by rotation of the electric motor. The mold changing apparatus for a spinning machine according to any one of claims 1, 3, 5, or 6.   A spinning machine comprising the mold exchanging device according to any one of claims 1 to 8.

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