JP2005111401A - Powder treating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a powder treating apparatus with which adhesion of a material to be treated to a guide vane, remelting thereof and wear of the guide vane can be prevented. <P>SOLUTION: A powder treating apparatus body 1 is provided with a treating vessel 8, a shaft bearing 14 for supporting rotation of the treating vessel 8, a supporting member 15 for fixing and supporting the shaft bearing 14, a rotary shaft 9 for transmitting rotation force to the treating vessel 8, a shaft bearing 10 for supporting rotation of the rotary shaft 9, a motor 11 which is the drive source of rotation of the treating vessel 8, an upper cover 2 of the treating vessel 8, an upper plate 3 arranged between the upper cover 2 and the treating vessel 8, a guide vane 13 attached to the upper plate 3, a rotary shaft 16 for transmitting rotation force to the upper plate 3, a shaft bearing housing 4 which supports rotation of the rotary shaft 16, a motor 17 which is the drive source of rotation of the upper plate 3 and a pedestal 18 for fixing and supporting the motor 17. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a powder processing apparatus in which a guide vane and a processing container are rotated around the same rotation center axis.

Conventionally, powder processing apparatuses are known.
For example, there is one disclosed in Patent Document 1 below. In this Patent Document 1, a grinding medium, a grinding cylinder that accommodates and rotates the grinding medium, and the grinding cylinder are separated from the inner wall of the grinding cylinder, and the movement direction of the grinding medium is determined. A guide plate to be changed is essential.
JP-A-6-320032

  However, in the configuration of Patent Document 1, the tip of the guide plate is very thin, and friction due to sliding between the object to be processed and the pulverization medium is severe, so that the guide plate is worn and deteriorates in performance or is damaged. In some cases.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.

That is, the powder processing apparatus of the present invention is arranged along the inner wall of a processing container that accommodates and rotates an object to be processed and a processing medium, and the processing medium that rotates with the rotation of the processing container is transferred to the processing container. A powder processing apparatus having a guide vane that is separated from an inner wall and changes its direction of movement, and wherein the processing vessel and the guide vane are separately rotated around the same rotation center axis. Arranged on one side of the processing vessel and driving the processing vessel to rotate the processing vessel, and arranged on the other side of the processing vessel in the direction of the central axis of rotation, and the guide vane in the same direction as the processing vessel And a guide vane driving motor that rotates with a speed difference.
Thereby, the collision speed and surface sliding speed between the layer of the object to be processed and the processing medium and the guide vane can be reduced, and adhesion and remelting of the object to be processed can be prevented. Further, since the wear of the guide vane can be reduced, it is possible to reduce the contamination of the object to be processed (the wear of the guide vane).

Further, the powder processing apparatus of the present invention detects the rotational load of the processing vessel driving motor, and controls the start or stop of the guide vane driving motor based on the value of the rotational load. Means are provided.
Thereby, the rotational load of the processing container driving motor can be suppressed. Further, when the rotational load of the processing container driving motor decreases, the guide vane driving motor can be stopped by stopping the guide vane driving motor in order to return to the initial stable state.

Further, in the powder processing apparatus of the present invention, the guide vane drive control means is configured such that when the rotational load of the processing container drive motor exceeds a predetermined value, or from an average value of the rotational load during a predetermined time. When the predetermined value increases, the guide vane driving motor is started. If the rotational load of the processing container driving motor does not increase within a predetermined time after the starting, the processing container driving motor is stopped. It is characterized by controlling so that
Thereby, only when the rotational load of the electric motor for driving the processing container is increased by the workpiece attached to the tip of the guide vane, the rotational load can be suppressed by rotating the guide vane.

Further, the powder processing apparatus of the present invention detects a rotational load of the processing container driving motor, and based on the value of the rotational load, at least one of the guide vane driving motor or the processing container driving motor. Rotational speed control means for controlling the rotational speed is provided.
Thereby, the relative speed of rotation of the guide vane and the processing container can be controlled, and powder processing can be performed while suppressing a decrease in energy applied to the workpiece and the processing medium.

Further, in the powder processing apparatus of the present invention, the rotational speed control means may be configured so that the rotational load of the processing container driving motor exceeds a predetermined value or is determined from an average value of rotational loads during a predetermined time. The guide vane driving motor is rotated faster than the processing vessel driving motor, and is controlled to rotate slower than the processing vessel driving motor after a predetermined time has elapsed. Features.
Thereby, only when the rotational load of the processing vessel driving motor is increased by the workpiece attached to the tip of the guide vane, the guide vane driving motor is rotated faster than the processing vessel driving motor, The cleaning effect which isolate | separates the to-be-processed object adhering to the guide vane front-end | tip can be acquired. Then, by controlling the motor for driving the guide vanes so as to rotate later than the motor for driving the processing container, it is possible to confirm whether the cleaning is sufficiently performed by detecting the rotational load.

Next, embodiments of the invention will be described.
FIG. 1 is a view showing an embodiment of a powder processing apparatus according to the present invention, and FIG. 2 is a view showing a state of powder processing in a processing container.

  The powder processing apparatus A can move up and down a part M including a powder processing apparatus main body 1 and an upper lid 2, an upper plate 3, a bearing housing 4, a guide vane 13, a rotating shaft 16, a motor 17, and a base 18 which will be described later. A lifting device 5, a base 6 on which the powder processing apparatus main body 1 and the lifting device 5 can be arranged, and a base 7 that supports the base 6 are provided.

  The powder processing apparatus main body 1 includes a rotating processing container 8, a bearing 14 that supports the rotation of the processing container 8, a support member 15 that fixes and supports the bearing 14, and a rotating shaft that transmits rotational force to the processing container 8. 9, a bearing 10 that supports the rotation of the rotating shaft 9, a motor 11 that is a rotational drive source of the processing container 8, a connecting portion 12 that connects the rotating shaft 9 and the motor 11, and an upper lid 2 of the processing container 8. An upper plate 3 disposed between the upper lid 2 and the processing container 8, a guide vane 13 attached to the upper plate 3, a rotating shaft 16 for transmitting a rotational force to the upper plate 3, and A bearing housing 4 that supports the rotation of the rotary shaft 16, a motor 17 that is a rotational drive source of the upper plate 3, a base 18 that fixes and supports the motor 17, and the rotary shaft 16 and the motor 17 Comprising a coupling portion 19 which forms an.

The processing container 8 is a container that accommodates an object to be processed and a processing medium inside and performs powder processing by being rotated by a motor 11.
The bearing 14 is fixedly supported by a support member 15 provided on a base portion at the top of the base 6 and supports the rotation of the processing container 8.

The rotating shaft 9 transmits the rotational force of the motor 11 to the processing container 8 through the connecting portion 12.
The bearing 10 is fixedly arranged toward the inside from the base portion at the top of the base 6 and rotatably supports the rotating shaft 9.

  The motor 11 includes a rotation speed control means (not shown) that can detect the rotation load of the motor 11 and control the rotation speed of the motor 11.

  The upper lid 2 is rotatably supported by the bearing housing 4 and seals the upper end surface of the processing container 8. The upper lid 2 rotates integrally with the processing container 8 during powder processing.

The upper plate 3 is fixedly provided so as to be integrated with the rotation shaft 16 which is the same rotation center shaft.
The guide vane 13 is provided on the upper plate 3 along the inner wall of the processing container 8, and changes the direction of movement by separating the processing medium that is accompanied by the rotation of the processing container 8 from the inner wall of the processing container 8. It is something to be made.

  The rotating shaft 16 is rotatably supported at the central portion of the bearing housing 4 and transmits the rotational force of the motor 17 via the connecting portion 19.

  The bearing housing 4 is connected and fixed to the elevating device 5 by a connecting portion 25 described later, and can support the upper lid 2 and the rotating shaft 16 rotatably as described above.

The motor 17 includes guide vane drive control means (not shown) that detects the rotational load of the motor 11 and controls the start or stop of the motor 17. Further, a rotation speed control means (not shown) that can detect the rotation load of the motor 11 and control the rotation speed of the motor 17 is also provided.
The motor 17 is provided with a brake so as not to rotate with respect to the driving of the motor 11.

  The base 18 is disposed and fixed on the upper portion of the bearing housing 4 and supports the motor 17 at the upper portion. Further, it is connected and fixed to the lifting device 5 by a connecting portion 24 described later. Further, a through hole 18 a is provided so that the motor 17 and the rotary shaft 16 can be connected by the connecting portion 19.

  The lifting / lowering device 5 has a weight 20 used for raising the part M of the powder processing apparatus main body 1, a container 21 having a lifting / lowering space for the weight 20, a lifting / lowering operation unit 26, and the weight 20. The connected wire 22, the pulley 23 to which the wire 22 is hooked, the connecting portion 24 connected to the base 18, the connecting portion 25 connected to the bearing housing 4, and the lifting operation And an operation unit 26.

  If the weight 20 connected by the wire 22 via the pulley 23 is lowered by the lifting / lowering operation unit 26, the part M of the powder processing apparatus main body 1 connected to the lifting / lowering device 5 by the connecting parts 24 and 25 rises. To do. Conversely, when the weight 20 is raised, the part M of the powder processing apparatus main body 1 connected to the lifting device 5 is lowered.

Next, the operation of the powder processing apparatus A will be described.
First, the part M of the powder processing apparatus main body 1 is raised by the lifting device 5, and the object to be processed and the processing medium are accommodated in the processing container 8. And the site | part M of the powder processing apparatus main body 1 is lowered | hung with the raising / lowering apparatus 5, and the upper cover 2 of the processing container 8 is closely_contact | adhered and sealed.

Next, the motor 11 is driven, the rotational force is transmitted to the rotary shaft 9 via the connecting portion 12, and the processing container 8 is rotated. When only the processing container 8 is rotated, as shown in FIG. 2A, a part of the object 27 and the processing medium 28 that are accompanied by the rotation of the processing container 8, the guide vane 13 is connected to the inner wall of the processing container 8. The direction of motion is changed by separating the substrate from the substrate 27 and collides with the layer of the object 27 to be processed.
At this time, when a constant increase in rotational load due to the object to be processed adheres to the tip of the guide vane 13 and grows is detected, the motor 17 is driven and the rotational force is transmitted via the connecting portion 19 to the rotating shaft. The upper plate 3 to which the guide vane 13 is attached is rotated.
As shown in FIG. 2B, the guide vane 13 rotates along the inner wall of the processing container 8 in the same direction as the processing container 8 while maintaining a gap and a constant angle with the inner wall.
If the guide vane 13 is rotated faster than the processing vessel 8, the object 27 to be processed attached to the guide vane 13 can be removed.
Further, the motors 11 and 17 are provided with rotation speed control means, respectively, and the rotation load of the motor 11 can be detected and the rotation speeds of the motors 11 and 17 can be controlled.

Here, a specific operation of avoiding the rotation load of the motor 11 in the rotation control of the motors 11 and 17 will be described.
First, when the processing container 8 is rotating at the set rotation speed N ₀ , the guide vane drive control means provided in the motor 17 or the rotation speed control means provided in the motors 11 and 17 is set at regular intervals. Further, the rotational load P of the motor 11 due to the growth of the workpiece 27 adhered to the guide vane 13 is detected by an absolute value and stored in a storage unit (not shown). Further, by using the value of the rotational load P that the storage, the average rotational load P _avi between before T ₂ seconds calculated from the previous T ₁ seconds of rotating the load P and the detected time T, the rotational load P is average rotational Compare whether the load _Pavi exceeds 1.2 times. At the same time, it is also compared whether the rotational load P does not exceed the rated rotational load P ₀ that is the limit of use of the motor 11. Here, i = 0, 1, 2,...
If it is determined that the current rotational load P is 1.2 times the average rotational load P _avi or exceeds the rated rotational load P ₀ , the motor 17 rotates the guide vane 13 in the same direction as the processing container 8, and the motor 11 rotational load is reduced. At this time, the object 27 attached to the tip of the guide vane 13 is removed by rotating the guide vane 13 faster than the processing container 8 for a predetermined time.

Here, the operation of avoiding the rotational load will be specifically described with reference to FIG. FIG. 3 is a graph showing the relationship between the rotational load of the motor 11 and the time and the relationship between the rotational speed of the processing container 8 and the guide vane 13 and the time during the rotational load avoiding operation of the motor 11. This shows the case where there is no increase in rotational load or increase in rotational load within the time.
At time T _a of FIG. 3 (a), the rotational load P does not exceed 1.2 times the average rotational load P _avi, rotational load P is judged to exceed the rated rotation load P _0, the motor 17 Thus, the rotation of the guide vane 13 is started.
As shown in FIG. 3 this time (b), T ₃ seconds from the time T _a, and ΔNrpm rotate faster than the processing vessel 8 of the guide vane 13, to remove the object to be processed 27 attached to the guide vanes 13. After that, when the rotation load P is not increased abnormally when the processing container 8 is rotated at a half rotation number of T4 for ₄ seconds, the rotation of the guide vane 13 is stopped. Return to the same state. This is because it is considered that the workpiece 27 has been sufficiently removed from the tip of the guide vane 13.
Here, T ₁ = 60, T ₂ = 70, T ₃ = 10, T ₄ = 600, and ΔN = 100.
By operating in this way, the workpiece 27 attached to the guide vane 13 can be removed, and the rotational load on the motor 11 can be reduced. From FIG. 3A, it can be seen that the rotational load returns to almost the same value as the average value P _av0 of the original rotational load and is stable. If no action is taken, the rotational load increases and the motor trips as shown by the dashed line.

Next, the rotation load avoidance operation in the case where the rotation load of the motor 11 increases again within T ₄ seconds in FIG.
Within the T ₄ seconds, ignored within an average mean rotational load P _avi (T ₁ before after rotation of the rotary load P _av0 or rated rotational load P ₀ or guide vanes 13 seconds if not yet rotate the guide vanes 13 When the rotational load P increases to any value greater than or equal to 1.2 times), the speed of the processing container 8 is decelerated in increments of 25% of the set rotational speed N ₀ each time this condition is met. However, the critical rotational speed N _a of the processing container 8 is provided as a lower limit, in the case where the rotational load P increases the critical revolution number N _a, and stopping the rotation of the processing container 8. When decelerating the rotational speed of the processing vessel 8 below the critical rotational speed N _a, it is impossible to generate a centrifugal force required to handle the object to be processed 27.

Here, the operation of avoiding the rotational load will be specifically described with reference to FIG. FIG. 4 is a graph showing the relationship between the rotational load of the motor 11 and time during the rotational load avoiding operation of the motor 11 and the relationship between the rotational speed of the processing container 8 and the guide vane 13 and time. _This shows the case where the rotational load increases within ₄ seconds.
At time T _b of FIG. 4, since the rotational load P has reached the rated rotational load P _0, as in the case of FIG. 3, to start the rotation of the guide vanes 13, T ₃ seconds from the time T _b, the guide vanes 13 is rotated faster than the processing container 8 by ΔN rpm. Thereafter, the processing container 8 is rotated at half the number of rotations. However, since the object 27 is not sufficiently removed, the rated rotation is performed at a time T _c within T ₄ seconds after T ₃ seconds from the time T _b. The rotational load P has reached the load P ₀ . Therefore, as shown in FIG. 4B, the set rotational speed N ₀ of the processing container 8 is decelerated by 25%. At the same time, as shown in FIG. 4 (b), the rotational speed of the guide vane 13 is changed from the time T _c to T ₃ seconds to remove the object 27 attached to the tip of the guide vane 13. ΔNrpm rotate faster than the rotational speed 0.75N ₀ to the set rotational speed N ₀ was decelerated by 25%. Thereafter, the guide vane 13 is rotated at half the rotation speed of the rotation of the processing container 8 (0.75N _0/2).
Thereafter, although not temporarily increased rotational load P is settled, in order to be treated 27 is not sufficiently removed, again increased after a predetermined time has elapsed, the rotational load P at time T _d, the guide vanes The value reaches 1.2 times the average rotational load P _av2 after 13 pre-rotations. Therefore, as shown in FIG. 4 (b), and 50% of the set rotational speed N ₀ of the rotational speed of the processing container 8. At the same time, as shown in FIG. 4B, from the time T _d to T ₃ seconds, the rotation speed of the guide vane 13 is reduced by 0.5% by reducing the set rotation speed N ₀ of the processing vessel 8 by 50%. Rotate ΔN rpm faster than _zero . Thereafter, the guide vane 13 is rotated at half the rotation speed 0.5 N _0/2 rotation of the processing container 8 in this case.
By operating in this way, it is possible to reliably remove the workpiece 27 attached to the guide vane 13 and reduce the rotational load of the motor 11.
Incidentally, even after repeated rotation speed reduction of the processing container shown in FIG. 4 (b), the rotational load is increased, when forced to the rotation speed of the processing chamber below the critical rotational speed N _a, the processing The rotation of the container 8 stops.

Next, the operation of decelerating the rotational speed of the processing container 8 and removing the workpiece 27 attached to the guide vane 13 and then returning the rotational speed of the processing container 8 to the set rotational speed N ₀ will be described.
If the rotational load P does not increase within T ₄ seconds after performing the rotational load avoidance operation similar to that described above, the current rotational speed of the processing container 8 is reduced to the previous rotational speed that decelerates. return. At this time, the guide vane 13 is similarly returned to the previous rotational speed. When the rotational load does not increase within the next T ₄ seconds, the same operation is performed again, and this is sequentially repeated. Then, after the rotational speed of the processing container 8 returns to the set rotational speed N ₀ , when the rotational load does not increase within T ₄ seconds, the rotation of the guide vane 13 is stopped and the returning operation is finished. Become.

Here, referring to FIG. 5, the operation of returning the rotational speed of the processing container 8 will be specifically described. FIG. 5 shows the rotational load of the motor 11 when the rotational speed of the processing container 8 is gradually restored when the rotational load does not increase for T ₄ seconds after the rotational load avoiding operation is performed. It is a graph which shows the relationship between time, and the rotation speed of the process container 8 and the guide vane 13, and time.
As shown in FIG. 5, three times the rotational load avoidance operation, a case of performing up to the time T _e, when the rotational load within T ₄ seconds is not increased from the time T _e, the current processing container 8 returning the rotational speed 0.75N ₀ before one for reducing the rotational speed 0.5 N _0. At this time, the guide vanes 13 to maintain the 0.5 N _0/2. Next, when the rotational load does not increase within T ₄ seconds from time T _f , the same operation is performed again, and the rotational speed of the processing container 8 is returned to N ₀ . Thus, after returning the rotational speed of the processing vessel 8 to the set rotational speed N ₀ at time T _g, in the case where no further rotational load is increased within T ₄ seconds, the rotation of the guide vanes 13 at time T _h Is stopped and the return operation is completed. At this time, it can be seen from FIG. 5 that the rotational load returns to the same value as the average value P _av0 of the first rotational load and is stable.
By operating in this way, the processing container 8 is returned to the set rotational speed, and the processing medium 28 again has the kinetic energy at the set rotational speed, and the powder processing is performed in a state before the rotational load is generated. Can do.
Note that the powder processing apparatus A of the present embodiment avoids the rotational load as shown in FIGS. 3 and 4, for example, when the rotational load increases within T ₄ seconds from the time T _f in FIG. An operation can also be performed. At this time, after rotating the guide vane by ΔN rpm faster than the rotational speed of the processing container for T ₃ seconds, the guide vane is rotated at half the rotational speed of the processing container.

  In order to finish the powder processing, the driving of the motors 11 and 17 is stopped, and the rotation of the processing container 8 and the guide vane 13 is stopped. And the site | part M is raised by the raising / lowering apparatus 5, and the to-be-processed object 27 and the processing medium 28 which were powder-processed from the inside of the processing container 8 are taken out.

According to the present embodiment, the collision speed and surface sliding speed between the layer 27 of the object 27 and the processing medium 28 and the guide vane 13 are reduced, and the object to be processed adheres to the tip of the guide vane 13 and is remelted. To prevent. Further, since the guide vane 13 can be prevented from being worn, impurities (wear from the guide vane 13) can be prevented from being mixed into the workpiece 27.
Further, the rotational load P can be suppressed by rotating the guide vane 13 only when the rotational load P of the motor 11 is increased by the workpiece 27 attached to the tip of the guide vane 13.
Further, when the rotational load P of the motor 11 decreases, the guide vane 13 can be stopped by stopping the motor 17 in order to return to the initial stable state.
In addition, the relative speed of rotation of the guide vane 13 and the processing container 8 can be controlled, and powder processing can be performed while suppressing a decrease in energy applied to the workpiece 27 and the processing medium 28.
Further, only when the rotational load P of the motor 11 is increased by the workpiece 27 attached to the tip of the guide vane 13, the motor 17 is rotated faster than the motor 11 and attached to the tip of the guide vane 13. A cleaning effect for separating the workpiece 27 is obtained. Then, by controlling the motor 17 so as to rotate later than the motor 11, it is possible to confirm whether the cleaning is sufficiently performed by detecting the rotational load P.

The figure which shows one Embodiment of the powder processing apparatus which concerns on this invention. The figure which shows the mode of the powder processing in a processing container. 7 is a graph showing the relationship between the rotational load of the motor 11 and the time and the relationship between the rotational speed of the processing container 8 and the guide vane 13 and the time during the rotational load avoiding operation of the motor 11, and within a certain time after the rotational load avoiding operation. Indicates the case where the rotational load did not increase. 7 is a graph showing the relationship between the rotational load and time of the motor 11 and the relationship between the rotational speed and time of the processing vessel 8 and the guide vane 13 during the rotational load avoiding operation of the motor 11, and within T ₄ seconds after the rotational load avoiding operation. Shows when the rotational load increases. When the rotational load does not increase for T ₄ seconds after the rotational load avoiding operation is performed, the relationship between the rotational load of the motor 11 and time when the rotational speed of the processing container 8 is gradually restored, and The graph which shows the relationship between the rotation speed of the processing container 8 and the guide vane 13, and time.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Powder processing apparatus main body 2 Upper cover 3 Upper plate 4 Bearing housing 5 Lifting device 6 Base 7 Base 8 Processing container 9 Rotating shaft 10 Bearing 11 Motor 12, 19, 24, 25 Connection part 13 Guide vane 14 Bearing 15 Support member 16 Rotating shaft 17 Motor 18 units 18a Through hole 21 Container 22 Wire 23 Pulley 26 Elevating operation unit 27 Object to be processed 28 Processing medium A Powder processing device

Claims (5)

The processing medium disposed along the inner wall of the processing container that accommodates and rotates the workpiece and the processing medium is separated from the inner wall of the processing container to change the direction of movement. A powder processing apparatus having a guide vane, wherein the processing vessel and the guide vane rotate separately around the same rotation center axis,
An electric motor for driving the processing container that is disposed on one side of the processing container in the direction of the rotation center axis and rotates the processing container;
A powder processing apparatus comprising: a guide vane driving motor disposed on the other side of the processing container in the rotation center axis direction and rotating the guide vane with a speed difference in the same direction as the processing container. apparatus.   5. A guide vane drive control unit that detects a rotational load of the processing container driving motor and controls start or stop of the guide vane driving motor based on a value of the rotational load. Item 1. A powder processing apparatus according to Item 1.   The guide vane drive control means is configured such that when the rotational load of the processing vessel driving motor exceeds a predetermined value or when the rotational load of the processing container driving motor increases to a predetermined value from an average value of the rotational load during a predetermined time. The vane driving motor is started, and when the rotational load of the processing container driving motor does not increase within a predetermined time after the starting, the processing container driving motor is controlled to stop. The powder processing apparatus according to claim 2, wherein:   Rotational speed control means for detecting the rotational load of the processing vessel driving motor and controlling the rotational speed of at least one of the guide vane driving motor or the processing vessel driving motor based on the rotational load value. The powder processing apparatus according to any one of claims 1 to 3.   When the rotational load of the processing vessel driving motor exceeds a predetermined value, or when the rotational speed control means increases to a predetermined value from an average value of the rotational load during a predetermined time, the guide vane 5. The powder according to claim 4, wherein the driving motor is rotated faster than the processing container driving motor, and is controlled to rotate slower than the processing container driving motor after a predetermined time has elapsed. Processing equipment.

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