JP2017159399A - Processing device with tool abnormality detection function, tool abnormality detection method of the processing device with tool abnormality detection function, and tool abnormality detection program of the processing device with tool abnormality detection function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a processing device with a tool abnormality detection function which can securely detect presence or absence of abnormality of a tool, and provide a tool abnormality detection method of the processing device with the tool abnormality detection function, and a tool abnormality detection program of the processing device with the tool abnormality detection function.SOLUTION: The processing device includes: a drive part 2 which rotationally drives around a first axis P1, a tool 3 mounted on the drive part 2 around a second axis P2 eccentric to the first axis P1; a probe 45 which can abut on the tool 3 by rotationally driving around a third axis P3; an abnormality detection part 4 which detects whether the tool 3 is abnormal or not by presence or absence of abutment between the tool 3 and the probe 45; a control part 6 which determines whether the tool 3 and the probe 45 abut or not on the basis of positional information, and arranges the tool 3 on a movement locus of the probe 45 by rotationally driving the drive part 2 when it is determined that the tool 3 and the probe 45 do not abut on each other; and a positional information acquisition part 5 for acquiring the positional information between the tool 3 and the probe 45.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a machining apparatus with a tool abnormality detection function, a tool abnormality detection method for a machining apparatus with a tool abnormality detection function, and a tool abnormality detection program for a machining apparatus with a tool abnormality detection function.

Conventionally, a probe capable of contacting a tool such as a micro drill (ultra-fine diameter) or an end mill attached to a rotationally driven drive unit has been adopted. A technique for detecting an abnormality is known (for example, see Patent Document 1).
By the way, some tools of the processing apparatus are attached to a position eccentric with respect to the rotation shaft of the drive unit that is rotationally driven, such as a cutting tool for finishing the inner surface of the hole.

JP 2007-216373 A

However, in a processing apparatus in which a tool is attached at a position eccentric with respect to the rotation axis, the tool may be arranged at a position deviating from the probe movement locus depending on the stop position of the drive unit. At this time, the tool is disposed at a position offset in the radial direction of the rotating shaft and cannot contact the probe. For this reason, there is a risk of determining that the tool is abnormal although the tool is normal.
Therefore, in the prior art, in the case of a machining apparatus in which a tool is attached at a position eccentric with respect to the rotation axis of the drive unit, there remains a problem in that the presence or absence of a tool abnormality is reliably detected. It was.

  Accordingly, the present invention has been made in view of the above circumstances, and is a machining apparatus with a tool abnormality detection function capable of reliably detecting the presence or absence of a tool abnormality, a tool abnormality detection method and a tool abnormality detection of a machining apparatus with a tool abnormality detection function. It is an object of the present invention to provide a tool abnormality detection program for a machining apparatus with functions.

  In order to solve the above-described problem, the machining apparatus with a tool abnormality detection function of the present invention is centered on a drive unit that rotates around a first axis and a second axis that is eccentric with respect to the first axis. A tool attached to the drive unit, a probe that can be driven to rotate about a third axis, a position information acquisition unit that acquires position information of the tool and the probe, and the position Based on the information, it is determined whether or not the tool and the probe are in contact with each other when the probe is rotationally driven, and when it is determined that the tool and the probe are not in contact with each other, A control unit that rotates and arranges the tool on a movement locus when the probe is rotated, and an abnormality detection unit that detects whether or not the tool is abnormal depending on the presence or absence of contact between the tool and the probe; Characterized by comprising There.

  According to the present invention, the control unit determines whether or not the tool and the probe come into contact with each other when the probe is driven to rotate based on the position information, and determines that the tool and the probe do not come into contact with each other. Since the tool is placed on the movement trajectory when the probe is driven to rotate by driving the drive unit, the probe can be driven to rotate before operation of the processing device with a tool abnormality detection function or during inspection of the processing. Tool abnormality can be detected reliably.

  Further, the tool is a cutting tool, the position information acquisition unit further acquires the position of the blade of the cutting tool as the position information, and the control unit rotates the probe based on the position information. In some cases, it is further determined whether or not the cutting tool blade is in contact with the probe, and when it is determined that the cutting tool blade and the probe are in contact, the probe is rotated to drive the probe. The cutting tool is arranged so that the portion other than the cutting tool blade comes into contact with the cutting tool.

  According to the present invention, the control unit further determines whether or not the cutting tool blade and the probe abut when the probe is driven to rotate, and when determining that the cutting tool blade and the probe contact, Since the driving unit is rotationally driven and the cutting tool is disposed so that the probe and the part other than the cutting tool blade are in contact with each other, it is possible to prevent the probe from contacting the cutting tool blade when detecting a tool abnormality. This can prevent the cutting blade from being damaged.

  The tool abnormality detection method for a machining apparatus with a tool abnormality detection function according to the present invention includes a drive unit that rotates around a first axis and a second axis that is eccentric with respect to the first axis. A tool attached to the part, a probe that can be driven to rotate about a third axis, a position information acquisition unit that acquires position information of the tool and the probe, and the position information Based on the above, it is determined whether or not the tool and the probe are in contact with each other when the probe is driven to rotate. If it is determined that the tool and the probe are not in contact with each other, the drive unit is rotated. A control unit that drives and arranges the tool on a movement trajectory at the time of rotational driving of the probe, and an abnormality detection unit that detects whether or not the tool is abnormal depending on the presence or absence of contact between the tool and the probe, Tool abnormality detection function with A tool abnormality detection method for a machining apparatus, comprising: a position determination step for determining whether or not the tool and the probe come into contact when the probe is driven to rotate based on the position information; and the position determination In the step, when it is determined that the tool and the probe do not come into contact with each other, a driving step of rotating the driving unit to place the tool on a movement locus when the probe is driven to rotate, and the tool And a tool abnormality presence / absence determining step for determining whether or not is abnormal.

  A tool abnormality detection program for a machining apparatus with a tool abnormality detection function according to the present invention includes a drive unit that rotates around a first axis and a second axis that is eccentric with respect to the first axis. A tool attached to the part, a probe that can be driven to rotate about a third axis, a position information acquisition unit that acquires position information of the tool and the probe, and the position information Based on the above, it is determined whether or not the tool and the probe are in contact with each other when the probe is driven to rotate. If it is determined that the tool and the probe are not in contact with each other, the drive unit is rotated. A control unit that drives and arranges the tool on a movement trajectory at the time of rotational driving of the probe, and an abnormality detection unit that detects whether or not the tool is abnormal depending on the presence or absence of contact between the tool and the probe, Tool abnormality inspection with A tool abnormality detection program for a machining apparatus with a function, wherein the position determination step determines whether or not the tool and the probe come into contact when the probe is driven to rotate based on the position information, and the position In the determination step, when it is determined that the tool and the probe do not come into contact with each other, a driving step of rotating the driving unit to place the tool on a movement locus during the rotation driving of the probe; A tool abnormality presence / absence determining step for determining whether or not the tool is abnormal is executed by the control unit.

  According to the tool abnormality detection method and the tool abnormality detection program of the machining apparatus with a tool abnormality detection function of the present invention, it is determined whether or not the tool and the probe come into contact when the probe is driven to rotate based on the position information. If it is determined that the tool and the probe do not come into contact with each other in the position determination step, the driving step of rotating the drive unit to place the tool on the movement locus when the probe is driven to rotate, and whether the tool is abnormal Tool abnormality presence / absence determining step is included, so that the tool abnormality can be reliably detected by rotating the probe before the operation of the machining apparatus with the tool abnormality detection function or during inspection. .

  According to the present invention, the control unit determines whether or not the tool and the probe come into contact when the probe is driven to rotate based on the position information of the position information acquisition unit, and the tool and the probe do not come into contact with each other. If it is determined that the tool is placed on the movement locus when the probe is driven to rotate, the probe is driven to rotate before the processing device is in operation or during inspection. Can reliably detect tool abnormalities.

It is explanatory drawing of the processing apparatus with a tool abnormality detection function which concerns on one Embodiment of this invention. It is an enlarged view of the tool and the probe periphery when viewed from the axial direction of the first axis. It is a flowchart of a tool abnormality detection method. It is explanatory drawing of the processing apparatus with a tool abnormality detection function which concerns on other embodiment. It is an enlarged view of the tool and the probe periphery when viewed from the axial direction of the first axis.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an explanatory diagram of a machining apparatus with a tool abnormality detection function according to an embodiment of the present invention.
A machining apparatus with a tool abnormality detection function according to the present embodiment (hereinafter simply referred to as “machining apparatus 1”) mainly includes a drive unit 2, a tool 3, an abnormality detection unit 4, a position information acquisition unit 5, and A control unit 6, a stage 7, and a movable table 9 are mainly provided.
The drive unit 2 includes a housing 21 and a main shaft portion 23.
A drive motor (not shown) is provided inside the housing 21. The main shaft portion 23 is provided to be rotatable about the first axis P <b> 1 with respect to the housing 21. The main shaft portion 23 is driven by a driving motor that rotates based on a command from the control unit 6 described later, and rotates around the first axis P1.

The tool 3 is a cutting tool 30, for example. The tool 3 is not limited to the cutting tool 30 and may be, for example, a drill, a micro drill, an end mill, a milling cutter, a tap, or a reamer.
As for the tool 3, the main-body part 31 is formed in the elongate column shape. The tool 3 is provided with a blade 33 at the tip. The base end of the tool 3 is chucked and fixed to the main shaft portion 23. The tool 3 is attached to the drive unit 2 so that the second axis P2 that is the central axis thereof is parallel to and eccentric from the first axis P1 that is the rotation center of the main shaft part 23.

The abnormality detection unit 4 is disposed on the side of the tool 3 attached to the drive unit 2. The abnormality detection unit 4 includes a housing 41, a rotation unit 43, and a probe 45.
A servo motor (not shown) is provided inside the housing 41. The rotating part 43 is driven to rotate around a third axis P3 provided so as to be parallel to the first axis P1 and the second axis P2.
The probe 45 is a long rod-like member and is provided so as to extend in a direction orthogonal to the third axis P3. A base end portion 45 a of the probe 45 is fixed to the rotating portion 43. The tip 45b of the probe 45 moves while drawing a fan-shaped movement locus by the rotation of the rotating part 43.

FIG. 2 is an enlarged view around the tool and the probe when viewed from the axial direction of the first axis.
As shown in FIG. 2, the probe 45 is set such that the length from the third axis P3 to the tip is substantially the same as the distance from the third axis P3 to the first axis P1.
The tip 45b of the probe 45 can come into contact with the tool 3 when the second axis P2 of the tool 3 is disposed on the abnormality detecting unit 4 side with the first axis P1 interposed therebetween (see the region r1 in FIG. 2). It has become. On the other hand, the tip 45b of the probe 45 is located when the second axis P2 of the tool 3 is disposed on the opposite side of the abnormality detection unit 4 with the first axis P1 interposed therebetween (see region r2 in FIG. 2). Cannot be contacted.

The abnormality detection unit 4 detects whether or not the tool 3 is abnormal based on the presence or absence of contact between the tool 3 and the probe 45.
As shown in FIG. 2, the probe 45 of the abnormality detection unit 4 rotates around the third axis P <b> 3 during a tool abnormality presence / absence determination process described later. More specifically, the probe 45 of the abnormality detection unit 4 has a position corresponding to one tangent to the main shaft part 23 (see the solid line of the probe 45 in FIG. 2) when viewed from the axial direction of the first axis P1. It rotates around the third axis P3 between the position corresponding to the other tangent of the main shaft portion 23 (see the two-dot chain line of the probe 45 in FIG. 2). When the probe 45 and the tool 3 come into contact with each other in the tool abnormality presence / absence determination step, the abnormality detection unit 4 is prevented from rotating, for example, by a servo motor, increasing torque and generating an overcurrent of a predetermined value or more. The control unit 6 described later detects an overcurrent accompanying an increase in torque and determines that the tool 3 is normal. In addition, the probe 45 of the abnormality detection unit 4 is configured such that, for example, when the tool 3 is broken or when the tool 3 is not attached to the processing apparatus 1, the probe 45 is not in contact with the tool 3 and is only a predetermined angle θ. Rotate. Thereby, the control unit 6 determines that the tool 3 is abnormal.

  As shown in FIG. 1, the position information acquisition unit 5 acquires position information between the tool 3 and the probe 45, and includes an image acquisition device such as a camera. The position information acquisition unit 5 acquires, as position information, whether or not the tool 45 arranged eccentrically with respect to the first axis P1 and the probe 45 abut when the probe 45 is driven to rotate. . Note that the position information acquisition unit 5 is not limited to an image acquisition device such as a camera, and may be, for example, a switch or the like by which an operator inputs position information after making a determination by visual observation. If the drive motor inside the housing 21 is a servo motor and the contactable range between the tool 3 and the probe 45 is known, the servo motor and the rotational position (angle) of the servo motor are detected. The position information may be acquired by a rotation sensor such as a rotary encoder.

The control unit 6 controls the processing apparatus 1. The control unit 6 acquires and processes position information based on, for example, the operation of the drive unit 2 and a signal from the position information acquisition unit 5, and detects abnormality of the tool 3 by the abnormality detection unit 4. The control unit 6 includes a computer-readable recording medium 6a in addition to a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), various interfaces, and the like (not shown), for example. A tool abnormality detection program for implementing the tool abnormality detection method of the machining apparatus 1 is incorporated in the recording medium 6a of the control unit 6.
As an example of the operation, the control unit 6 executes each process related to a tool abnormality detection method described later by, for example, the CPU reading and executing a tool abnormality detection program stored in the recording medium 6a.

  The drive unit 2 and the abnormality detection unit 4 described above are supported by the movable table 9. The drive unit 2 and the abnormality detection unit 4 are attached to the movable table 9 so as not to move relative to each other. The movable table 9 is movable in the horizontal direction (XY direction) and the vertical direction (Z direction) with respect to the processing apparatus body 10 based on, for example, an instruction from the control unit 6.

  The stage 7 is located below the movable table 9. The stage 7 is formed with a flat upper surface, and a workpiece W that is a processing target can be placed thereon. The stage 7 is provided in the processing apparatus main body 10. The tool 3 of the processing apparatus 1 can process a predetermined portion of the workpiece W placed on the stage 7 by moving the movable table 9 in the XYZ directions.

(Tool abnormality detection method)
FIG. 3 is a flowchart of the tool abnormality detection method.
Then, the tool abnormality detection method implemented by the processing apparatus 1 mentioned above is demonstrated. In addition, please refer to each figure of FIG. 1 and FIG. 2 about the code | symbol of each part in the following tool abnormality detection methods.
As shown in FIG. 3, the tool abnormality detection method according to the present embodiment is executed, for example, before the processing apparatus 1 performs processing on a workpiece, and mainly includes a position determination step S10 and driving. Step S20 and tool abnormality presence / absence determination step S30 are included.

(Position determination step S10)
The tool abnormality detection method according to the present embodiment first performs a position determination step S10.
In the position determination step S10, based on the position information of the position information acquisition unit 5, it is determined whether or not the tool 3 and the probe 45 come into contact when the probe 45 is driven to rotate.
In the position determination step S <b> 10, for example, the position information acquisition unit 5 that is a camera acquires position information of the tool 3 and the probe 45 as an image. When the control unit 6 obtains positional information that the second axis P2 of the tool 3 is disposed on the abnormality detection unit 4 side with the first axis P1 interposed therebetween (see the region r1 in FIG. 2), It is determined that the probe 45 comes into contact. In addition, the control unit 6 obtains position information that the second axis P2 of the tool 3 is disposed on the opposite side of the abnormality detection unit 4 with the first axis P1 interposed therebetween (see the region r2 in FIG. 2). It is determined that the tool 3 and the probe 45 are not in contact with each other.

(Drive process S20)
Next, the tool abnormality detection method according to the present embodiment performs the driving step S20.
In the driving step S20, when it is determined in the position determination step S10 that the tool 3 and the probe 45 are not in contact with each other, the driving unit 2 is rotationally driven so that the tool 3 is placed on the movement locus when the probe 45 is rotationally driven. Deploy.
In the drive step S20, in the position determination step S10, for example, the second axis P2 of the tool 3 is disposed on the opposite side of the abnormality detection unit 4 with the first axis P1 interposed therebetween (see region r2 in FIG. 2). When the position information is obtained, the control unit 6 rotates the drive unit 2. Then, the control unit 6 obtains position information from the position information acquisition unit 5 that the second axis P2 of the tool 3 is disposed on the abnormality detection unit 4 side with the first axis P1 interposed therebetween (see region r1 in FIG. 2). When obtained, the drive unit 2 is stopped. Thereby, the tool 3 is arrange | positioned in the position which can contact | abut the probe 45, when the probe 45 rotationally moves centering on the 3rd axis | shaft P3.

(Tool abnormality presence / absence determination step S30)
Next, the tool abnormality detection method according to the present embodiment performs a tool abnormality presence / absence determination step S30.
In the tool abnormality presence / absence determination step S30, it is determined whether or not the tool 3 is abnormal.
Specifically, the control unit 6 determines that the tool 3 is normal by detecting an overcurrent generated when the probe 45 and the tool 3 are in contact with each other, for example, by preventing the rotation of the servo motor. Further, the controller 6 rotates the probe 45 by a predetermined angle θ without contacting the probe 45 and the tool 3 when the tool 3 is broken or when the tool 3 is not attached to the processing apparatus 1, for example. When it does, it determines with the tool 3 being abnormal.
The tool abnormality detection method ends when it is detected whether the tool 3 is abnormal. When it is determined by the control unit 6 that the tool 3 is abnormal, the operator performs maintenance work such as replacement or mounting of the tool 3.

  According to the processing apparatus 1, the tool abnormality detection method, and the tool abnormality detection program of the present embodiment, the control unit 6 determines whether the probe 3 is rotated when the probe 45 is driven to rotate based on the position information from the position information acquisition unit 5. When it is determined whether or not the probe 45 is in contact, and it is determined that the tool 3 and the probe 45 are not in contact, the drive unit 2 is driven to rotate, and the tool is placed on the movement locus when the probe 45 is driven to rotate. 3 is arranged, the abnormality of the tool 3 can be reliably detected by rotationally driving the probe 45 before the operation of the processing apparatus 1 or during inspection during the processing.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

FIG. 4 is an explanatory diagram of a machining apparatus with a tool abnormality detection function according to another embodiment. In FIG. 4, the drive unit 2, the tool 3, and the abnormality detection unit 4 are illustrated, and other components are omitted as appropriate.
In the above-described embodiment, the tool 3 is formed in a long column shape. The tool 3 is attached to the drive unit 2 such that the base end is chucked and fixed to the main shaft portion 23, and the second shaft P2, which is the center shaft, is parallel to the first shaft P1 and eccentric. (See FIG. 1).
On the other hand, as shown in FIG. 4, the tool 3 has a second axis P2 that is the central axis in parallel to the first axis P1, for example, at the tip of the main shaft portion 23 formed in a long shape. And you may attach to the drive part 2 so that it may decenter.

FIG. 5 is an enlarged view of the periphery of the tool and the probe when viewed from the axial direction of the first axis in the machining apparatus with a tool abnormality detection function according to another embodiment.
Further, as shown in FIG. 5, the position information acquisition unit further acquires the position of the blade 33 of the cutting tool 30 as the position information as the position information, and the control unit rotationally drives the probe 45 based on the position information. Sometimes it may be further determined whether or not the blade 33 of the cutting tool 30 and the probe 45 abut. When the control unit determines that the blade 33 of the cutting tool 30 and the probe 45 are in contact with each other, the driving unit 2 is rotationally driven so that the probe 45 and the portion other than the blade 33 of the cutting tool 30 are in contact with each other. Byte 30 may be arranged in

  According to this configuration, the control unit further determines whether or not the blade 33 of the cutting tool 30 and the probe 45 are in contact with each other when the probe 45 is rotationally driven, and the blade 33 of the cutting tool 30 and the probe 45 are in contact with each other. If it is determined, the drive unit 2 is driven to rotate, and the cutting tool 30 is disposed so that the probe 45 and the part other than the blade 33 of the cutting tool 30 come into contact with each other. The probe 45 can be prevented from coming into contact with the blade 33 of the cutting tool 30. Thereby, it is possible to prevent the blade 33 of the cutting tool 30 from being damaged.

  In the embodiment described above, the position determination step S10 is the first step. However, the present invention is not limited to this. First, the tool abnormality presence / absence determination step S30 is performed. If the contact is not made, the position determination step S10 and the driving step S20 may be performed. Thereby, since the position determination process S10 and the driving process S20 are executed only when the tool 3 and the probe 45 are in an abnormal state, an efficient inspection can be performed.

  In addition, it is possible to appropriately replace the components in the above-described embodiments with known components without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Processing apparatus (machining apparatus with a tool abnormality detection function) 2 ... Drive part 3 ... Tool 4 ... Abnormality detection part 5 ... Position information acquisition part 6 ... Control part 30 ... · Tool (tool) 33 ... Blade P1 ... First axis P2 ... Second axis P3 ... Third axis

Claims (4)

A drive unit that rotates around the first axis;
A tool attached to the drive unit, centered on a second axis eccentric with respect to the first axis;
A probe that can be brought into contact with the tool by being rotationally driven around a third axis;
A position information acquisition unit for acquiring position information of the tool and the probe;
Based on the position information, it is determined whether or not the tool and the probe are in contact when the probe is driven to rotate, and if it is determined that the tool and the probe are not in contact, the drive A control unit that rotationally drives the unit and arranges the tool on the movement locus during the rotational driving of the probe;
An abnormality detection unit for detecting whether or not the tool is abnormal depending on the presence or absence of contact between the tool and the probe;
A machining apparatus with a tool abnormality detection function, comprising: The tool is a bite;
The position information acquisition unit further acquires the position of the cutting tool blade as the position information,
The control unit further determines, based on the position information, whether or not the cutting tool blade and the probe come into contact with each other when the probe is driven to rotate, and the cutting tool blade and the probe come into contact with each other. 2. The tool abnormality according to claim 1, wherein if it is determined, the tool is rotated so that the probe is arranged so that the probe and the part other than the blade of the tool are in contact with each other. Processing equipment with detection function. A drive unit that rotates around the first axis;
A tool attached to the drive unit, centered on a second axis eccentric with respect to the first axis;
A probe that can be brought into contact with the tool by being rotationally driven around a third axis;
A position information acquisition unit for acquiring position information of the tool and the probe;
Based on the position information, it is determined whether or not the tool and the probe are in contact when the probe is driven to rotate, and if it is determined that the tool and the probe are not in contact, the drive A control unit that rotationally drives the unit and arranges the tool on the movement locus during the rotational driving of the probe;
An abnormality detection unit for detecting whether or not the tool is abnormal depending on the presence or absence of contact between the tool and the probe;
A tool abnormality detection method for a machining apparatus with a tool abnormality detection function comprising:
A position determination step for determining whether or not the tool and the probe abut when the probe is driven to rotate based on the position information;
In the position determination step, when it is determined that the tool and the probe do not come into contact with each other, a driving step of rotating the driving unit to place the tool on a movement locus when the probe is rotationally driven; ,
A tool abnormality presence / absence determination step for determining whether or not the tool is abnormal;
A tool abnormality detection method for a machining apparatus with a tool abnormality detection function. A drive unit that rotates around the first axis;
A tool attached to the drive unit, centered on a second axis eccentric with respect to the first axis;
A probe that can be brought into contact with the tool by being rotationally driven around a third axis;
A position information acquisition unit for acquiring position information of the tool and the probe;
Based on the position information, it is determined whether or not the tool and the probe are in contact when the probe is driven to rotate, and if it is determined that the tool and the probe are not in contact, the drive A control unit that rotationally drives the unit and arranges the tool on the movement locus during the rotational driving of the probe;
An abnormality detection unit for detecting whether or not the tool is abnormal depending on the presence or absence of contact between the tool and the probe;
A tool abnormality detection program for a machining apparatus with a tool abnormality detection function comprising:
A position determination step for determining whether or not the tool and the probe abut when the probe is driven to rotate based on the position information;
In the position determination step, when it is determined that the tool and the probe do not come into contact with each other, a driving step of rotating the driving unit to place the tool on a movement locus when the probe is rotationally driven; ,
A tool abnormality presence / absence determination step for determining whether or not the tool is abnormal;
Is executed by the control unit. A tool abnormality detection program for a machining apparatus with a tool abnormality detection function.

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