KR100271662B1 - Apparatus for mounting smd in smd mountor and method thereof - Google Patents

Abstract

PURPOSE: A surface mounting apparatus and a method for mounting a part by using the same are provided to improve the reliability and to reduce the manufacturing cost by preventing electronic parts from being damaged. CONSTITUTION: A surface mounting apparatus comprises a base plate(19) which is movably coupled to an X-axis of an X-Y table. A driving motor is mounted on the base plate(19). A ball screw is coupled to the driving motor. A head base(20) is coupled to the ball screw(27) so as to move in a Z-axis direction. A plurality of pneumatic cylinders(21) are coupled to the head base(20). A nozzle shaft(22) is connected to the pneumatic cylinders(21) so as to move in the Z-axis direction driven by the pneumatic cylinders(21). A sucking nozzle(23) is coupled to an end of the nozzle shaft(22) so as to suck parts. An aligning device is provided to align the parts sucked by the sucking nozzle(23). A vacuum generator(24) is provided to generate a vacuum force. A pressure sensor(25) is provided to detect the vacuum pressure of the sucking nozzle(23).

Description

Device for mounting surface mount component of surface mounter and its mounting method {APPARATUS FOR MOUNTING SMD IN SMD MOUNTOR AND METHOD THEREOF}

The present invention relates to a device for mounting a surface mount component of a surface mounter and a method for mounting the same, and in particular, to mount the surface mounter of a surface mounter to increase the reliability of the mounting by reducing the number of parts and stabilizing driving by rationalizing the structure. An apparatus and a mounting method thereof are provided.

The recent trend toward miniaturization of electrical and electronic products has led to higher density, miniaturization, and diversification of electronic components. Therefore, Surface Mounting Technology (SMT) is accelerating in the production of printed circuit board (PCB) assembly. The surface mounting technology is largely classified into the development of a surface mounting device (SMD) and the assembly technology of the surface mounting component. The development of surface-mounted parts is progressing in the trend of miniaturization and integration with the development of semiconductor technology, and the assembly technology is focused on the development of precision assembly equipment required for the surface mounting of these components and the operation technology of various assembly equipments. have. A surface mounter is a device for mounting surface-mounted parts on a printed circuit board. It is a core equipment of surface-mounted assembly equipment, and receives various surface-mounted parts supplied in the form of tape, stick, and tray from a feeder to a printed circuit board. It is a equipment to transfer to the mounting position on the floor and to mount on the printed circuit board.

The surface mounter is developed separately from a high speed machine and a general purpose machine, and the high speed machine is configured to be suitable for assembling many parts in a short time, while the general purpose machine is configured to be suitable for mounting various parts. Therefore, the high speed machine is suitable for mass production because of its fast mounting speed, but it is not only suitable for mass production because it is not only suitable for mass production but also large size and expensive equipment. In addition, it is possible to mount various parts, so it is suitable for many kinds and small quantity production. Therefore, the high speed machine is being developed to work faster and the general purpose machine is capable of performing more precise and various functions.

1A and 1B show an example of an electronic component surface mounter belonging to the general-purpose machine, and as shown in the drawing, the surface mounter includes a worktable 1 constituting a reference frame and two sides of the worktable 1. XY table which is provided with a component supply part 1a which is installed to supply surface-mounted parts and a component feeder 2 installed therein, and an X-axis 3a and a Y-axis 3b, respectively, to determine a work position. (3), a conveyor (4) mounted on the work table (1) for conveying a working printed circuit board (P), and mounted on the XY table (3) and supplied by a component feeder (2). And a mounting apparatus that forms the head portion 5 to pick up the surface mount components to be mounted on the printed circuit board P.

As described above, the surface mounter includes a component supply unit in which the head part 5 is supplied by the XY table 3 when the printed circuit board P on which the surface mount component is mounted is transferred to the work space by the conveyor 4. (1a) and the component feeder (2) are moved to suck the components, and the head portion (5) which absorbs the components is moved to the mounting position of the printed circuit board (P) by the XY table (3) to mount the components. do.

On the other hand, in the above structure, the head portion 5 that absorbs and mounts the surface mount component is not only equipped with a plurality of heads 6 but also has various forms depending on the operation method.

2 shows an example of a conventional surface mounter head portion, and as shown therein, the head portion 5 of the conventional surface mounter is coupled to move on the X axis 3a of the XY table 3. Several head bodies 8 are coupled to the lower part of the plate 7, and the nozzle shafts 9 which are vertical axes are coupled to the head bodies 8 so as to be able to move up and down and rotate, respectively. Adsorption nozzle 10 is fitted to the lower end, and the rack 11 and pinion 12 for moving the nozzle shaft 9 up and down are coupled to the upper end of the nozzle shaft 9, and the rack 11 is linearly moved. A straight guide 13 to guide is coupled. In addition, the pinion 12 is driven by a drive motor (not shown). An air hole (not shown) penetrates the center of the notch shaft 9 to communicate with the nozzle 10, and the air hole is connected to the vacuum generator 14. In addition, the air flow path formed by the nozzle shaft 9 and the vacuum generator 14 is coupled to a vacuum pressure sensor 15 for measuring the degree of vacuum.

The head portion 5 is moved by the XY table 3, the head portion 5 is located in the component supply unit (1a) and the process of adsorbing the component first, the nozzle shaft (9) is a vertical axis rack Moving downward by the 11 and the pinion 12 and located in the component supplied by the component feeder 1a, the components are adsorbed by the vacuum generator 14 and by the rack 11 and the pinion 12. While moving upward again, as shown in FIG. 3, the parts are sucked by the component alignment means including jaws (JAW) 16 and tools TOOL 17 provided at the end of the nozzle shaft 9. The component is aligned to the center of the adsorption nozzle 10. Then, the XY table 3 moves to the mounting position of the printed circuit board. At this time, the presence, absence, and standing of the adsorbed parts are determined using the vacuum pressure sensor 15. Subsequently, the vertical shaft is lowered again by the rack 11 and the pinion 12, and the vacuum pressure is removed to mount the parts, and then move upwards to finish the mounting.

On the other hand, as another example of the conventional surface mounter head portion, as shown in Figure 4, is coupled to the pneumatic cylinder (18) to replace the vertical axis by the rod moved up and down by the pneumatic cylinder (18) .

In another example of the conventional surface mounter, the vertical axis is moved up and down by a pneumatic cylinder to operate.

However, the head portion 5 of the surface mounter of the conventional surface mounter that absorbs and mounts the components as described above requires the vertical axis to be installed on the individual head 6, thereby requiring many vertical axes, that is, the nozzle shaft 9. A drive motor for driving the vertical axis is installed to increase the weight of the head portion 5, thereby increasing the inertia load of the XY table 3 which moves the head portion 5, resulting in unstable overall system and increased number of parts. There was a problem of raising the cost.

In addition, in the case of the head portion 5 in which the vertical axis is operated by the pneumatic cylinder 18, the shock is applied to the nozzle 10 to which the parts are adsorbed by the momentary stop in high speed operation due to the characteristics of the pneumatic cylinder 18. This can cause instability of adsorbed component alignment and component failure. In addition, when vacuum pressure is measured in the state of holding a component to align the adsorbed components, there is a problem in that the measurement of the pneumatic pressure drops due to the shape and holding force of the component, thereby lowering reliability.

Accordingly, an object of the present invention is to provide a surface mounting component mounting apparatus and a mounting method of the surface mounter to rationalize the structure to reduce the number of parts and stabilize the driving to increase the reliability of the mounting.

1A is a plan view showing an example of a general surface mounter;

1B is a front view of the surface mounter;

2 is a front view showing a head of a conventional surface mounter;

3 is a plan view showing the alignment of the head portion of the conventional surface mounter,

4 is a plan view showing another example of a head portion of a conventional surface mounter;

5A is a front view showing a surface mounter surface mounting component mounting apparatus of the present invention;

Figure 5b is a side view showing a surface mounter surface mounting component mounting apparatus of the present invention,

Figure 6 is a flow chart for the method of mounting the surface mounter surface mount component of the present invention.

(Explanation of symbols for the main parts of the drawing)

3; XY table 3a; X axis

19; Base plate 20; Head base

20a; Headblock 21; Pneumatic cylinder

22; Nozzle shaft 23; Suction Nozzle

24; Vacuum generator 25; Pressure sensor

26; Drive motor 27; Ball screw

In order to achieve the object of the present invention as described above, the base plate is movably coupled to the X axis of the XY table in the X axis line, formed by the drive motor mounted to the base plate, and the XY axis of the XY table The ball screw coupled to the drive motor so as to be located in the Z-axis direction perpendicular to the plane that is perpendicular to the plane, and a plurality of head blocks are provided, and coupled to the ball screw Z-axis along the ball screw by driving the drive motor Head base moving in the direction, a plurality of pneumatic cylinders coupled to the head base corresponding to the head block, and a nozzle connected to the pneumatic cylinders to be inserted into the respective head blocks and moved in the Z-axis direction by operation to the pneumatic cylinders Aligning the shaft and the suction nozzle which is coupled to the end of the nozzle shaft to suck the components and the components sucked by the suction nozzle A surface mount part of the surface mounter, comprising an alignment means, a vacuum generator coupled to communicate with the nozzle shaft, and generating a suction force in the suction nozzle, and a pressure sensor for detecting a vacuum pressure state of the suction nozzle. A mounting apparatus is provided.

In addition, the XY table to move the base plate to the upper side of the component feeder to which the component is supplied, by operating any pneumatic cylinder of the plurality of pneumatic cylinders to lower the nozzle shaft connected to the pneumatic cylinder and at the same time the alignment means Moving the adsorption nozzle to adsorb the opened and lower parts than other adsorption nozzles, and moving the head base downward in the Z-axis direction by the operation of the driving motor to position the lowered adsorption nozzle on the mounting part; Adsorbing the components to the suction nozzle by the vacuum pressure generated by the operation of the vacuum generator, and moving the head base in the Z-axis direction by the operation of the driving motor, and simultaneously operating the pneumatic cylinder to operate the nozzle shaft. Aligning the components adsorbed on the suction nozzle while closing the alignment means by the rising; Moving the base plate to a mounting position by a table; activating the pneumatic cylinder to lower the nozzle shaft to move the alignment means and moving the adsorption nozzles with the components adsorbed below other adsorption nozzles; Detecting the presence, absence and upright state of the components adsorbed to the adsorption nozzle by a pressure sensor; and operating the driving motor to lower the head base in the Z-axis direction to move the components adsorbed on the adsorption nozzle to the mounting position. And a step of removing the vacuum pressure applied to the component and simultaneously destroying the component to mount the component at the mounting position.

Hereinafter, the surface mount component mounting apparatus of the surface mounter according to the present invention will be described according to the embodiment shown in the accompanying drawings.

The surface mount component mounting apparatus of the surface mounter of the present invention includes a base plate 19 which is movably coupled to the X axis 3a of the XY table in the X axis line, as shown in Figs. Vertical movement means coupled to the base plate 19 to enable linear movement in the vertical Z-axis direction, and several head blocks 20a are formed on one side and coupled to the vertical movement means to linear movement in the Z-axis direction. The head base 20, the several pneumatic cylinder 21 is coupled to the head base 20, one side is coupled to the pneumatic cylinder 21 and the other side is inserted through the head block 20a The nozzle shaft 22 which is guided by the head block 20a and moves up and down by the action of the pneumatic cylinder 21, and the suction nozzle 23 which is coupled to the end of the nozzle shaft 22 to adsorb components And alignment means for aligning the components adsorbed to the suction nozzle 23, It is configured to include a vacuum generator 24, a pressure sensor 25 for detecting the vacuum that is coupled to communicate with the machine nozzle shaft 22 generate a suction force.

The base plate 19 is formed to have a predetermined area and one side thereof is movably coupled to the X axis 3a of the XY table.

The vertical movement means is composed of a drive motor 26 and a ball screw 27 coupled to the drive motor 26 shaft, the drive motor 26 is coupled to the base plate 19 and the ball screw 27 ) Is positioned perpendicular to the X-axis.

The head base 20 has a plurality of head blocks 20a formed at one lower side thereof, and the head block 20a is preferably formed of a hexahedron, and through-holes (not shown) can be inserted into the center of the head shaft 20. O) is formed. And the other side of the head base 20 is formed with a coupling portion (20b) is coupled to the ball screw 27, the head base 20 is coupled to the ball screw (27).

The pneumatic cylinder 21 is installed on the upper side of the head base 20 by the angle plate 28 bent in the form of a memory, the position is located above the head block 20a. Several pneumatic cylinders 21 are installed corresponding to the number of head blocks 20a.

An internal flow path (not shown) is formed in the nozzle shaft 22 to allow air to flow, and the internal flow path communicates with the suction nozzle 23.

The alignment means has four jaws 16 coupled to the suction nozzle 23 at the end of the nozzle shaft 22 and the jaws 16 'when the nozzle shaft 22 moves. The tool (TOOL) 17 'is made to combine.

The vacuum generator 24 is installed in communication with the internal flow path of the nozzle shaft 22, and is then provided with a pressure sensor 25 for measuring the vacuum state inside the nozzle shaft 22.

Hereinafter, the mounting method for the surface mounter surface mounting component mounting apparatus of the present invention will be described.

As shown in Fig. 6, the surface mounter surface mounting component mounting apparatus of the present invention is first installed in the component supply unit 3a by the XY table 3 to move to the component supply unit 2 for supplying the surface mount component. do. Then, when the nozzle shaft 22 to suck the parts is lowered by the pneumatic cylinder 21, the tool 17 'is operated to open the jaws 16', and the suction nozzle of the nozzle shaft 22 to continue to work down. (23) is lower than the other adsorption nozzle (23). In this state, when the driving motor 26, which is a vertical movement means, operates, the ball screw 27 coupled thereto rotates, and the head base 20 coupled thereto rotates vertically by the rotation of the ball screw 27. In this case, the suction nozzle 23 positioned below by the pneumatic cylinder 21 is positioned above the part. When the suction nozzle 23 is located above the component, the operation of the driving motor 26 is stopped, and a vacuum pressure is generated by the vacuum generator 24, and the component is adsorbed to the suction nozzle 23.

When the component is adsorbed to the suction nozzle 23, the head base 20 is vertically raised upward by the vertical movement means, and at the same time, the pneumatic cylinder 21 is operated to move the nozzle shaft 22 on which the component is adsorbed upward. Will be moved. At this time, the nozzle shaft 22 is moved and the tool 17 'is operated to close the jaws 16', thereby aligning the parts to a predetermined position of the suction nozzle 23.

In addition, the process of adsorption of components to each of the other adsorption nozzles is also adsorbed in the same manner as above. That is, when the component is adsorbed to the suction nozzle 23 and then another second suction nozzle 23 'to adsorb the component is moved to the position of the component to be adsorbed by the XY table 3, the second suction is carried out. The nozzle shaft 22 'is moved by the operation of the second pneumatic cylinder 21' which drives the nozzle shaft 22 'of the nozzle 23' so that the second suction nozzle 23 'is more than other suction nozzles. Will move down. In this state, when the driving motor 26, which is a vertical movement means, operates, the ball screw 27 coupled thereto rotates, and the head base 20 coupled thereto by the rotation of the ball screw 27 vertically. When descending, the second suction nozzle 23 'positioned below by the second pneumatic cylinder 21' is positioned above the part. When the second suction nozzle 23 ′ is positioned above the component, the operation of the driving motor 26 is stopped, and a vacuum pressure is generated by the vacuum generator 24, so that the component is connected to the second suction nozzle 23 ′. Is adsorbed.

When the components are adsorbed to each of the adsorption nozzles coupled to the head base 20 as described above and the alignment is completed, the XY table 3 is operated again to move to the mounting position of the printed circuit board. At the same time, the pneumatic cylinder 21 of the nozzle shaft 22 on which the component to be mounted is first adsorbed is operated to lower the nozzle shaft 22 and the tool 17 'is operated to open the jaw 16' and simultaneously open the nozzle shaft. The 22 stops at a position below the other nozzle shaft 22. At this time, using the pressure sensor 25 to determine the presence, absence and upright of the adsorbed parts. Subsequently, the head base 20 is lowered by the operation of the driving motor 26 so that the components adsorbed by the nozzle shaft 22 are lowered to the mounting height on the printed circuit board. At this time, the drive motor 26 is stopped and the vacuum pressure is removed and destroyed at the same time. Then, the drive motor 26 is operated to raise the head base 20 to mount the component on the printed circuit board. In this manner, the components adsorbed on the respective adsorption nozzles are mounted on the printed circuit board.

According to the present invention, one vertical axis that can be controlled by one driving motor 26 and a plurality of individual nozzle shafts 22 are controlled by using each pneumatic cylinder 21, thereby driving the drive used in the conventional structure. Reducing the number of motors 26 not only reduces the weight of the head but also reduces the number of parts. In addition, the vertical movement distance is increased by the vertical movement means and the pneumatic cylinder 21 to handle a variety of electronic components of different heights.

In addition, when measuring the vacuum pressure by adsorption of the surface-mounted components, the pneumatic cylinder 21 is lowered and measured without holding the components to minimize the influence of the shape or alignment means of the components.

As described above, the surface mounter surface mounting component mounting apparatus and mounting method thereof according to the present invention reduce the number of parts and the weight of the entire system to reduce the inertial load during operation, thereby stably supplying, adsorption and adsorption of the mounted components. By minimizing damage and shaking of the old electronic parts, it is possible to improve the mounting precision and mounting reliability and to reduce the cost.

Claims (2)

A base plate movably coupled to the X axis of the XY table in the X axis line, a drive motor mounted to the base plate, and a Z axis direction perpendicular to the plane formed by the XY axis of the XY table. A ball screw coupled to the drive motor to be positioned, a plurality of head blocks and a head base coupled to the ball screw to move along the ball screw along the ball screw in the Z-axis direction, correspond to the head block. A plurality of pneumatic cylinders coupled to the head base, a nozzle shaft connected to the pneumatic cylinders so as to be inserted into the respective head blocks, and moving in the Z-axis direction by actuating the pneumatic cylinders; Adsorption nozzles for adsorption and alignment means for aligning the components adsorbed on the adsorption nozzles, and coupled to communicate with the nozzle shaft. A vacuum generator, and a configuration also features a surface seal the surface-mounted component mounting apparatus of the organ, including a pressure sensor for detecting the state in which air pressure of the suction nozzle to generate a suction force to the nozzle. Moving the base plate to the upper side of the component feeder to which the component is supplied by the XY table; operating any pneumatic cylinder of the plurality of pneumatic cylinders to lower the nozzle shaft connected to the pneumatic cylinder, and at the same time, the alignment means is opened. Moving the adsorption nozzle to adsorb the component below other adsorption nozzles, moving the head base downward in the Z-axis direction by the operation of the driving motor, and placing the lowered adsorption nozzle on the mounting component; Adsorbing the component to the suction nozzle by the vacuum pressure generated by the operation of the generator, and moving the head base in the Z-axis direction by the operation of the drive motor, and simultaneously operating the pneumatic cylinder to raise the nozzle shaft. Aligning the components adsorbed on the suction nozzle while the alignment means is closed; Moving the base plate to the mounting position, and opening the alignment means by moving the pneumatic cylinder and lowering the nozzle shaft, and moving the suction nozzle to which the component is adsorbed, below the other suction nozzle, and the pressure sensor. Detecting the presence, absence and upright state of the components adsorbed on the adsorption nozzle by the step of operating the drive motor to lower the head base in the Z-axis direction to move the components adsorbed on the adsorption nozzle to the mounting position; And removing the vacuum pressure applied to the component and simultaneously destroying the component to mount the component at the mounting position.

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