FIELD OF THE INVENTION
The present invention relates to a feeding system and, more particularly, to a feeding system for feeding product components.
BACKGROUND
In electronics manufacturing, it is necessary to mount various electronic components on a circuit board. An automatic feeding system is often employed in order to improve manufacturing efficiency. An automatic feeding system typically includes a hopper and a vibration tray. The hopper is used to accommodate electronic components to be fed. The electronic components fall from a bottom discharge port of the hopper to the vibration tray. The vibration tray reciprocally vibrates in one or more directions to change a posture of the electronic components on the vibration tray such that the electronic components are in a predetermined posture. When the electronic components are in the predetermined posture, the electronic components in the predetermined posture may be picked up by a manipulator.
The electronic components falling from the bottom discharge port of the hopper fall to the vibration tray at an uncontrollable speed, which causes the speeds of the electronic components falling from the bottom discharge port of the hopper to not match the vibration frequency of the vibration tray. As a result, the feeding efficiency is reduced.
SUMMARY
A feeding system comprises a hopper having a discharge port at a bottom of the hopper, a flow control gate disposed at the discharge port of the hopper, a sliding rail obliquely disposed below the hopper, and a vibration excitation unit. The hopper accommodates a plurality of different types of product components and each of the product components flows out from the discharge port of the hopper. A flow rate of the product components flowing out from the discharge port is adjustable by adjusting an opening degree of the flow control gate. The sliding rail is configured to receive the product components flowing out from the discharge port. The vibration excitation unit receives the product components from the sliding rail and is configured to separate the product components and to change a posture of the product components by virtue of vibration.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described by way of example with reference to the accompanying Figures, of which:
FIG. 1 is a perspective view of a feeding system according to an embodiment.
DETAILED DESCRIPTION OF THE EMBODIMENT(S)
Exemplary embodiments of the present disclosure will be described hereinafter in detail with reference to the attached drawings, wherein like reference numerals refer to the like elements. The present disclosure may, however, be embodied in many different forms and should not be construed as being limited to the embodiment set forth herein; rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the concept of the disclosure to those skilled in the art. In addition, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, it is apparent that one or more embodiments may also be implemented without these specific details.
A feeding system according to an embodiment, as shown in FIG. 1, includes a hopper 100, a sliding rail 300, and a vibration excitation unit 500, 600.
The hopper 100, as shown in FIG. 1, is adapted to accommodate various different types of product components. In an exemplary embodiment, the different types of product components include, but are not limited to, electronic components, insulating components (such as plastic housings), metal components (such as conductive terminals), or semi-finished products. The hopper 100 includes a discharge port at bottom thereof, and the product components are adapted to flow out from the discharge port of the hopper 100 under gravity by a weight of each of the product components. The sliding rail 300 is obliquely disposed below the hopper 100 with respect to a horizontal plane, and has an upper end, at a right end in FIG. 1, at a high position and a lower end, at a left end in FIG. 1, at a low position so as to receive the product components flowing out from the discharge port of the hopper 100.
The vibration excitation unit 500, 600, as shown in FIG. 1, is disposed at the lower end of the sliding rail 300 and configured to receive the product components that slide off the lower end of the sliding rail 300. The vibration excitation unit 500, 600 includes a carrying table 500 for carrying the product components and a vibration generator 600 that drives the carrying table 500 to vibrate.
The carrying table 500, as shown in FIG. 1, is horizontally disposed relative to the horizontal plane. The carrying table 500 includes a smooth region 510 having a smooth surface and a rough region 520 having a rough surface. The smooth region 510 may also be referred to as a buffer region. The smooth region 510 of the carrying table 500 is located between the rough region 520 and the lower end of the sliding rail 300.
The feeding system, as shown in FIG. 1, further includes a gas blowing device 400 adapted to blow the product components fed to the smooth region 510 forward to the rough region 520. In an embodiment, the gas blowing device 400 includes a high pressure gas source and an gas blowing pipe connected to the high pressure gas source. The high pressure gas from the high pressure gas source is blown out through the gas blowing pipe to blow the product components to move forward on the carrying table 500.
The feeding system, as shown in FIG. 1, further includes a flow control gate 200 disposed at the discharge port of the hopper 100. A flow rate of the product components flowing out from the discharge port of the hopper 100 is adjustable by adjusting an opening degree of the flow control gate 200; the flow rate of the product components refers to the number of the product components that flow out from the discharge port of the hopper 100 per unit time.
Because the flow of the product components flowing out from the discharge port of the hopper 100 can be adjusted by adjusting the opening degree of the flow control gate 200, the opening degree of the flow control gate 200 can be adjusted so that the flow of the product components flowing out from the discharge port of the hopper 100 matches the vibration frequency of the vibration excitation unit 500, 600. In this way, the feeding efficiency of the feeding system is improved. In an embodiment, the flow control gate 200 may be a manual flow control gate or may be an automatic flow control gate. In the embodiment shown in FIG. 1, the flow control gate 200 is an automatic flow control gate controlled by a servo motor.
As shown in FIG. 1, the discharge port of the hopper 100 is positioned at the upper end of the sliding rail 300, and the product components flowing out from the discharge port of the hopper 100 directly fall to the upper end of the sliding rail 300, and slide along the sliding rail 300 to the lower end of the sliding rail 300. The lower end of the sliding rail 300 rests directly on the carrying table 500 such that the product components that slide out from the lower end of the sliding rail 300 directly move onto the carrying table 500.
The vibration generator 600, shown in FIG. 1, drives the carrying table 500 to reciprocally vibrate in at least one direction to separate the product components supplied to the carrying table 500 and change the posture or orientation of the product components. The vibration generator 600 drives the carrying table 500 to reciprocally vibrate in at least one of a horizontal direction and a vertical direction.
As shown in FIG. 1, the feeding system further includes a vision system 700 disposed above the carrying table 500 for identifying a position and a posture of the product components supplied to the carrying table 500. The feeding system further includes a manipulator adapted to pick up the product components in a predetermined posture, for example in a recumbent posture or an upright posture, from the carrying table 500 under visual guidance of the vision system 700. The vision system 700 may further be moved in a horizontal direction to adjust the position of vision system 700 in the horizontal direction.
The vision system 700, as shown in FIG. 1, includes a vertical slide bar 701, a first slider 710 slidably mounted on the vertical slide bar 701 so as to be movable along the vertical slide bar 701, a horizontal slide bar 702 mounted to the first slider 710, a second slider 720 slidably mounted on the horizontal slide bar 702 so as to be horizontally movable along the horizontal slide bar 702, and a camera 730 mounted on the second slider 720 so as to be vertically movable with the first slider 710 and so as to be horizontally movable with the second slider 720.
The feeding system, as shown in FIG. 1, further includes a fixed base 10 on which a plurality of support columns 11 are disposed. The hopper 100 is supported on the support columns 11. The sliding rails 300, the vibration excitation unit 500, 600 and the vision system 700 each are supported on the fixed base 10.
Patent Application
20190119053
