JP3859484B2 - Flat precision component assembly equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a flat plate precision component assembly apparatus (hereinafter also referred to as an assembly cell) that mounts a plate-shaped precision component (hereinafter referred to as a workpiece) such as an electronic circuit board by positioning it at a predetermined position of another precision component. .
[0002]
[Prior art]
For example, it is called an assembly cell in order to stack flat precision components such as electronic circuit boards, such as a 1 mm square and 0.5 mm thick crystal oscillator, or to attach them to other precision components such as pedestals. Assembly equipment is used.
An example of the assembling work will be described with reference to the description in Japanese Patent Laid-Open No. 63-266849. 8A and 8B show examples of electronic components to be assembled. FIG. 8A is a plan view, FIG. 8B is a front view, S is a stem serving as a mount base, T is a semiconductor mounted at a predetermined position on the stem S, and the like. A chip (work) of a solid element.
[0003]
FIG. 9 is a plan view showing the layout of a conventional assembly cell for explaining the mounting procedure. The robot arm removes one chip T from the first tray 3a on which the chips T cut out from the wafer by dicing are placed. After taking out and moving horizontally to place the chip T on the positioning device 4 and positioning it, the stem S is moved to the second tray 3b aligned at a predetermined position, and the chip T is moved to a predetermined position on the stem S. Is mounted. Here, the chip T can be accurately mounted at a predetermined position on the stem S by positioning the chip T with respect to the robot arm by the positioning device.
[0004]
As described above, the conventional assembly cell generally has a structure in which a robot moves between a horizontally laid tray and a positioning device according to a command such as numerical control to transfer a workpiece, and requires a large floor area. In addition to this, there is a problem that an error associated with movement in the XY directions is large.
[0005]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION An object of the present invention is to provide a flat precision component assembling apparatus that can solve such problems in the conventional assembly cell and can perform a compact and highly accurate mounting operation.
[0006]
[Means for Solving the Problems]
The present invention is an apparatus for assembling a plate-shaped precision component that transfers a plate-shaped precision component onto another precision component, and has a centering chuck for positioning the plate-shaped precision component and a plate-shaped precision component held at the lower end. However, a suction head that only moves up and down in the vertical direction from directly above the centering chuck and a plurality of holders for holding flat precision components are mounted on the top surface and moved horizontally at an intermediate height of the suction head lifting stroke. However, it is a flat precision component assembling apparatus, characterized in that it comprises a retreating position that doesdges directly above the centering chuck and a work stage that can be stopped at a position where each holder is directly below the suction head. The flat plate, wherein the centering chuck moves the center of the flat precision component so as to be the center of the chuck. It is an assembly apparatus of precision parts.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an assembly apparatus (assembly cell) for flat plate-shaped precision parts according to an embodiment, FIG. 2 is a front view, FIG. 3 is a right side view, 1 is a base, and 2 is a suction head that sucks a workpiece at the tip. , 21 is an elevating arm, 22 is a vacuum chuck attached to the tip of the elevating arm 21, 23 is a suction hose connected thereto, and 24 is a Z-axis drive unit that moves the suction head 2 in the Z-axis direction (vertical direction). 3 is a work stage that horizontally moves by placing flat precision components such as chips and stems on the upper surface, 34 is a holder for holding the work on the work stage 3, and 38 is the work stage 3 in the X-axis direction (left-right direction). An X-axis drive unit to be moved 4, 4 is a centering chuck which is a positioning device, and 5 is an operation panel including an operation switch and a control panel for operating them.
[0008]
FIG. 4 is a partial perspective view showing a part of the work stage 3 on which a work is placed. Reference numeral 33 denotes a mounting hole, 34 denotes a holder fitted therein, 35 denotes a set screw for fixing the holder 34, and 36 denotes an axis of the holder 34. A suction hole 37 formed at the top and opened at the upper end, 37 is a suction hose connected to the suction hole 36, and the suction hose 37 is connected to an exhaust device such as a vacuum pump (not shown).
[0009]
When the holder 34 is fitted into the mounting hole 33 and fixed with the set screw 35, and the workpiece is placed on the upper portion while being sucked from the suction hole 36, the workpiece is sucked and fixed to the holder 34. If the suction is released by operating the valve, the workpiece becomes free and can be peeled off by another suction means as appropriate.
The suction mechanism in the holder 36 is exactly the same as that in the vacuum chuck 22 of the suction head 2, and the suction head 2 can suck a workpiece on the lower surface of the tip.
[0010]
Next, the operation and positional relationship of each part of the assembly cell of this embodiment will be described with reference to the explanatory diagram of FIG. The suction head 2 moves only in the vertical direction, and the work stage 3 moves only in the horizontal direction on the left and right. The former is the Z axis and the latter is the X axis. Both axes are in the same vertical plane and are orthogonal. Further, the center of the lower centering chuck 4 is also at the Z-axis position, and the suction head 2 moves up and down along the Z-axis from directly above to above. Further, the work stage 3 moves horizontally at the intermediate height of the lifting / lowering stroke of the suction head 2, and the retraction position where the work stage 3 avoids just above the centering chuck 4 and the plurality of holders 34 mounted on the upper surface are the Z axis positions, that is, the suction head 2. It can be stopped at a position directly below. The holders 34 of the work stage 3 are arranged in a line on the X axis. In addition, if the work stage 3 is provided with a holder in addition to the one on the X axis as shown by the symbol A in FIG. 5 to form a plurality of rows, in addition to the Z axis and the X axis, the Y axis in the front-rear direction And the work stage 3 may be moved in both the XY directions within the same horizontal plane.
[0011]
The horizontal movement of the work stage 3 does not have to be limited to the linear directions of the X axis and the Y axis, and depending on the case, it can also be a rotational movement around the vertical axis. Although the work stage 3 itself does not need to move in the vertical direction, even if it moves up and down along with the horizontal movement for some reason, it does not depart from the technical idea of this patent.
[0012]
Next, an example of work by the assembly cell of this embodiment will be described with reference to FIG. Now, it is assumed that four holders 34 are arranged in a line on the work stage 3, and the work adsorbed by the leftmost holder 34a is transferred onto the rightmost holder 34d. First, as shown in FIG. 6A, the work stage 3 is moved and stopped at a position where the leftmost holder 34 a is directly below the suction head 2. Here, the suction head 2 descends to suck up the work T, and the work W is transferred from the work stage 3 to the suction head 2.
[0013]
Next, as shown in (b), the work stage 3 escapes to the retracted position, the suction head 2 descends, and the work W is placed on the centering chuck 4 directly below. Here, the centering chuck 4 operates to center the workpiece W so that the center of the workpiece W coincides with the normal center position, that is, the Z axis.
Subsequently, the suction head 2 descends again to suck up the workpiece W. At this time, the work W looks similar to the state shown in (a), but the position is accurately positioned. The work stage 3 moves there, and stops so that the rightmost holder 34d is at the Z-axis position. If the suction head 2 is lowered in this state, the workpiece W is placed at the correct position of the holder 34d.
[0014]
When such an operation is applied, for example, if a stem as shown in FIG. 8 is previously placed at a correct position on the holder 34d, a chip can be mounted on the upper surface of the stem by the operation of FIG. Can do. Further, by repeating the operation of FIG. 6 a plurality of times, for example, the workpiece that was in the leftmost holder 34a is moved to the rightmost holder 34d, and the workpieces that are in the second and third holders are stacked thereon. Work can be performed easily.
[0015]
As a premise of these mechanisms, a predetermined accuracy is required at the stop position for the lifting and lowering of the suction head 2 and the horizontal movement of the work stage 3, and a precision driving mechanism such as a ball screw, timing belt, step motor, etc. is required. Needless to say.
In addition to the above-described mechanism, the assembly cell of the present invention is combined with a related device such as a dispenser that supplies a predetermined amount of adhesive or conductive paste, an adhesive printer, a caulking machine, etc., to achieve low cost and high accuracy. An assembly cell can be constructed.
[0016]
Various types of centering chucks 4 are known. Broadly divided, one that presses against the chuck's fixed claw based on one side of the workpiece or two sides that are perpendicular to each other, and one that moves the workpiece so that the center of the workpiece becomes the center of the chuck with multiple claws surrounding the workpiece However, the former has the disadvantage that the center position is shifted by that amount if there is an error in the external dimensions of the workpiece, and the nails or jigs must be replaced when handling workpieces of different sizes and shapes. Therefore, it is desirable to adopt the latter structure in the present invention. As an example, a centering chuck described in Japanese Patent Application Laid-Open No. 2000-21954 is shown in FIG. FIG. 7 is a plan view showing the centering chuck 4. 41 is a support surface, 42 is a long hole provided on the surface, 43a to 43e are claws protruding through the long hole 42, and 44 is the center of the support surface. It is the X-shaped suction hole provided in. Each of the claws 43a to 43e can move in the elongated hole 42 from the outer periphery to the center, and 43a and 43b, 43c and 43d, 43e facing each other are moved so as to approach or separate from each other by a moving mechanism (not shown), The claw hits the edge of the workpiece by the elasticity of the spring, and the center of the workpiece is moved to the center position assumed by the centering chuck, that is, the center position of the chuck.
[0017]
As described above, in the assembly cell of the present invention, the suction head corresponding to the robot hand for transferring the workpiece does not move horizontally only by the vertical movement, and instead the workpiece stage on which the workpiece is mounted. Since the apparatus moves horizontally, the apparatus is extremely compact compared to the conventional apparatus in which a plurality of trays are arranged in a plane. For example, the apparatus shown in FIGS. The dimensions of 1 are 200 mm wide, 210 mm deep, and the height of the main body excluding the lifting cylinder is 240 mm.
[0018]
Incidentally, the lifting / lowering stroke of the suction head 2 is 50 mm, the size of the target workpiece is 1 mm square to 10 mm square, and the assembly accuracy is ± 0.002 mm.
[0019]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the assembly apparatus of the flat precision component which can perform a compact and highly accurate mounting operation is implement | achieved, and there exists an outstanding effect that the manufacturing cost of an electronic component reduces.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an assembly cell according to an embodiment of the present invention.
FIG. 2 is a front view showing an assembly cell according to an embodiment of the present invention.
FIG. 3 is a right side view showing an assembly cell which is an embodiment of the present invention.
FIG. 4 is a partial perspective view showing a main part of an assembly cell which is an embodiment of the present invention.
FIG. 5 is an explanatory diagram for explaining an operation and a positional relationship in an assembly cell which is an embodiment of the present invention.
FIG. 6 is an explanatory diagram illustrating an example of work in an assembly cell that is an embodiment of the present invention.
FIG. 7 is a plan view showing an example of a centering chuck suitable for use in the present invention.
FIG. 8A is a plan view and FIG. 8B is a front view showing an example of an electronic component that is an object of assembly work in the present invention.
FIG. 9 is a plan view showing a layout of a conventional assembly cell.
[Explanation of symbols]
1 Base 2 Suction head 3 Work stage
3a, 3b Tray 4 Centering chuck 5 Control panel
21 Lifting arm
22 Vacuum chuck
23 Suction hose
24 Z-axis drive unit
33 Mounting hole
34 Holder
35 Set screw
36, 44 Suction hole
37 Suction hose
38 X-axis drive unit
41 Support surface
42 long hole
43 Claw S Stem T Tip (work)

Claims (2)

An apparatus for assembling flat precision components that transfers flat precision components onto other precision components, with a centering chuck (4) for positioning the flat precision components and holding the flat precision components at the lower end A suction head (2) that only moves up and down in the vertical direction from directly above the centering chuck (4) and a plurality of holders (34) that hold flat precision components are mounted on the top surface of the suction head (2). A work stage that can be stopped at a position where the holder (34) is directly below the suction head (2) and a retreat position where the holder (34) is directly below the centering chuck (4) while horizontally moving at an intermediate height of the lifting stroke. (3) The assembly apparatus of the flat precision component characterized by comprising.   The flat plate precision component assembling apparatus according to claim 1, wherein the centering chuck (4) moves the center of the flat plate precision component so as to be the center of the chuck.

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