JPS6047065B2 - Long-distance annular vibrating barrel processing machine with synchronous interlocking electric motor - Google Patents

Description

[Detailed Description of the Invention] The present invention increases the excitation force by synchronously interlocking multiple electric motors, and excites a large, long-distance annular vibrating barrel to enable line machining of workpieces. This invention relates to a long-distance annular vibrating barrel processing machine with a synchronous interlocking motor for the purpose of.

Conventionally, attempts have been made to increase the excitation force by installing multiple oscillators in this type of processing machine, but even if multiple synchronous vibration motors are installed, there is no difference in the torque of each motor. As a result, the rotation angle of the unbalanced weight was never synchronized, causing the barrel to vibrate turbulently, producing turbulent flow in the mass inside the barrel, and the mass overflowing or being unevenly distributed in various parts of the barrel, causing normal helical flow motion. It was not possible to continue the cycle.

Therefore, a device (Japanese Patent Application No. 55-52093) was developed in which sprocket wheels or pulleys are fixed to the rotating shafts of multiple oscillators, and the sprocket wheels or pulleys are connected with a chain or a timing belt to synchronize them. , a good spiral flow of the mass was obtained. However, there are problems in that the chain makes a lot of noise, the timing belt is expensive and lacks mechanical strength against vibrations, and both have the risk of breaking when used for a long time. In addition, a pulse motor is conventionally known as a device for synchronizing the rotational angle phase of the rotating shaft of an electric motor, but if it is used in a vibrating barrel, it becomes large and expensive, and the structure is complicated due to its high precision. The problem was that it was weak against water and lacked durability. However, the present invention installs a plurality of relatively inexpensive general-purpose motors (for example, three-phase induction motors, etc.) in the longitudinal direction of the parallel, and uses the rotation of one motor as a reference to change the rotation angle phase of the rotation shaft of the other motor. Since the slippage is detected and the rotation is controlled using a microcomputer and a frequency converter (inverter), the rotation of multiple motors can be reliably synchronized, resulting in a robust and inexpensive synchronous interlocking motor. This is a successful development of a distance annular vibrating barrel processing machine.

The details of the apparatus of this invention will now be explained with reference to FIGS. 1 and 2 as follows. Although this embodiment shows a case where the rotations of two electric motors are synchronized, two or more electric motors can be controlled in the same way. A main motor 5 and a slave motor 6 are installed on the bottom plate 4 in the central space of the barrel 3. As this motor, a relatively inexpensive general-purpose motor (such as a three-phase induction motor) can be used. The total length of the barrel is several times to several tens of times the total width, and optimally it is 5 times to 1 length,
A large number of springs 2 are arranged on the machine base 1 along the bottom of the barrel 3, and on the springs 2, a pair of semicircular barrels 3a, 3b facing each other at both ends are connected to a pair of parallel linear barrels 3c, 3d. A barrel 3 which is connected and integrated into an annular shape is suspended and supported so as to be able to vibrate. The main motor 5 is rotated free-run by a commercial frequency power source 7, and this rotational angular velocity is used as a reference. The slave motor 6 is connected to a frequency conversion device 8 and rotated by a variable frequency power source at a specified rotational angular velocity. An upper weight 10, 10a and a lower weight 11, 11a are attached to the rotating shaft 9, 9a of each electric motor with a predetermined equal lead angle, and each rotating shaft 9, 9a (5 machines 1 A known pulse generator (encoder) 13, 13a fixed to the rotary shaft 9, 9a is connected by a flexible cable 12, 12a.
The rotation is transmitted to the pulse generators 13, 13a. The pulse generators 13 and 13a are connected to the microcomputer 1.
4, and the microcomputer 14 is connected to the frequency conversion device 8. The pulse generator shown in FIG. 3 is used instead of the pulse generator. The upper weights 10, 10a (
A similar effect can be achieved by providing a dog 19 on a lower weight (which may even be a downward weight) and providing a magnetic proximity switch 20 (sensor) above the dog to detect pulses. Reference numeral 15 is a synchroscope for observing the synchronization state of the pulses of each electric motor 5 and 6, but this is not necessarily necessary for the present invention.

The operation of this device will be explained based on the structure as described above.

Abrasive materials and workpieces, water and compound if necessary (hereinafter these charges will be collectively referred to as mass) are charged into the barrel 3, and the main motor 5 and the slave motor 6 are driven. The main motor 5 is operated at approximately 1800r' by a commercial frequency power supply.
Pm, and the slave motor 6 rotates at a rotational speed corresponding to the variable frequency sent by the frequency conversion device 8. The pulse generators 13, 13a input the generated pulses to the microcomputer (CPU) 14, and from the pulse generators 13, 13a to the microcomputer 14, the rotation shafts of the electric motors 5, 6 rotate at which position. Enter the information you have. The microcomputer 14 calculates the deviation in the rotation speed and rotation angle phase of the slave motor 6 based on the rotation speed and rotation angle phase of the main motor 5, and instructs the frequency conversion device 8 to synchronize each motor. The frequency converter 8 changes the frequency of the slave motor 6 to the frequency instructed by the microcomputer 8 so that it has the same rotational speed and almost the same rotational angle phase as the main motor 5, and synchronizes the slave motor 6 with constant feedback. Therefore, the mass in the barrel 3 repeats the normal spiral flow motion, and the workpiece is well polished.The mass moves up the flap 16, and the workpiece is separated by the sorting net 17 and carried out of the system to be processed on the line. . If the flap 16 is raised, the mass circulates within the barrel 3, allowing batch processing to be performed. In the above embodiment, a case was described in which two electric motors were synchronized, but when multiple electric motors are synchronized, the same number of frequency converters and pulse generators as slave motors are required, and one microcomputer is required. A stand is fine. Furthermore, in the above embodiment, the traction motor is free-run by a commercial frequency power source, so that it rotates synchronously at about 1800 r'Pm. However, by connecting a frequency converter to the input circuit of the traction motor, the rotation speed If set to , a plurality of slave motors can be synchronously interlocked at any rotation speed. Setting the rotation speed of the main motor in this manner also belongs to the technical scope of the present invention. In the above embodiment, the case where the apparatus of the present invention is used for polishing has been described, but it goes without saying that it can also be used for processing such as stirring, mixing, or pulverizing the contents, which all fall within the technical scope of the present invention. be. Then the fourth
Figures 5 and 5 show other embodiments in which the barrel shape is changed. That is, the semicircular barrels 3a, 3b are attached so as to descend in the flow direction of the husband squares (arrows 18, 18b), and the straight barrels 3c, 3d are attached in a downward direction in the flow direction of the husband squares (arrows 18a, 18c).
) is attached with an upward slope and a semicircular barrel 3a,
3b and linear barrels 3c and 3d are connected smoothly on the inner surfaces at the ends of the husband and wife, and the pulse generator, microcomputer, frequency converter, etc. are all the same as in the previous embodiment.

When the barrel is shaped like this, the flow at the corners is further improved and the sorting effect is also improved. Next, FIG. 6 shows a processing machine with a barrel 3'' of a similar shape installed outside the barrel 3 in the apparatus shown in FIGS. 1 and 2, and has double barrels inside and outside. According to the embodiment, it is possible to perform two different types of processing at the same time with one processing machine, for example, rough finishing can be performed with the outer barrel 3'', and then gloss finishing can be performed with the inner barrel 3. It is also possible to perform processing such as polishing in the outer barrel 3'' and then drying in the inner barrel 3 charged with desiccant material such as sawdust or corn flour. Not only that, but also multiple barrels of similar shape inside and outside (three or more)
It can also be configured to perform various types of processing at the same time. As described above, in the present invention, a plurality of electric motors are electrically synchronously interlocked, so the excitation force increases and it is possible to excite a large, long-distance annular vibrating barrel to machine a workpiece on a line. It has various effects such as good performance, robustness, and safety.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is a sectional view, FIG. 3 is a front view of another embodiment of the pulse generator, and FIG. 4 is an inclined view of another embodiment of the pulse generator. FIG. 5 is a front view of the case in which a barrel is used, and FIG. 6 is a plan view of another embodiment of the present invention in which a double barrel is used. 1...Machine base, 2...Spring, 3,3
″,3a93b93c93d*IO゜゜゜゜barrel, 4゜゜゜゜゜゜bottom plate, 5... Main motor, 6... Slave motor, 7... Commercial frequency power supply, 8...
・Frequency converter, 9, 9a... Rotating shaft, 10
, 10a... Upper weight, 11, 11a...
Lower weight, 12, 12a...Cable, 13,
13a...Pulse generator, 14...
Microcomputer, 15...Synchroscope, 16,16''...Flap, 17,17
″... Sorting net, 18, 18a, 18b, 18c...
...Arrow, 19... Dotsugu, 20...
・Magnetic proximity switch.

Claims (1)

[Scope of Claims] 1. A long-distance annular vibrating barrel in which one or more pairs of semicircular barrels facing each other at both ends and the same number of parallel linear barrels integrated at both ends of the semicircular barrels is installed so as to be able to vibrate. In the device, one main motor set at a constant rotation speed in the longitudinal direction of the barrel and one or more slave motors connected to a frequency converter are installed with their rotational axes perpendicular, and A plurality of pairs of unbalanced weights giving equal lead angles and excitation forces were fixed to the upper and lower ends of the rotating shafts of the main motor and the slave motor, and were connected to the rotating shafts of the main motor and the slave motor to a microcomputer. a pulse generator is provided, the microcomputer is connected to the frequency converter,
A long-distance annular vibrating barrel processing machine with a synchronous interlocking motor, characterized in that the plurality of pairs of unbalanced weights are continuously rotated in the same direction and synchronized while maintaining the lead angle. 2. Claim No. 2, characterized in that the semicircular barrel has a descending trend in the direction of movement of the mass, and the linear barrel has an upward trend in the direction of mass movement. The long-distance annular vibrating barrel processing machine with a synchronous interlocking electric motor according to item 1.