JP4119506B2 - Thin plate trimming device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a thin plate trimming apparatus for trimming a lead frame sheet (thin plate) composed of a plurality of lead frames.
[0002]
[Prior art]
Conventionally, in order to trim a lead frame sheet (thin plate) made up of a plurality of lead frames, a thin plate trimming apparatus has been used. Such a thin plate trimming apparatus includes a correction table on which a lead frame sheet is placed and positioned, and a trimming table on which the lead frame sheet is placed and trimmed.
[0003]
In such a thin plate trimming apparatus, the lead frame sheet is positioned on the correction table, and then the lead frame sheet on the correction table is conveyed to the trimming table by the conveying device.
[0004]
[Problems to be solved by the invention]
In the above-described thin plate trimming apparatus, the correction table is generally movable in the x and y directions, and is further rotatable around a reference point.
[0005]
For this reason, the correction table has a moving mechanism in the x direction and the y direction, and also has a rotation drive mechanism, so that the structure is complicated.
[0006]
The present invention has been made in view of the above points, and provides a thin plate trimming apparatus capable of accurately positioning a thin plate and simplifying a correction table moving mechanism. Objective.
[0007]
[Means for Solving the Problems]
The present invention relates to a correction table for mounting and positioning a thin plate, a trimming table for mounting and trimming a thin plate positioned by the correction table, a screw rod extending between the correction table and the trimming table, and a screw And a conveying device that moves along the bar and supplies the thin plate on the correction table to the trimming table. The correction table moves in the y direction orthogonal to the x direction when the direction of the screw bar is the x direction. A thin plate trimming apparatus that is capable of rotating in the θ direction about a reference point.
[0008]
According to the present invention, the thin plate is accurately positioned on the trimming table by moving the correction table in the y direction, rotating it around the reference point, and moving the supply head on the screw rod extending in the x direction. can do.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 are views showing an embodiment of a thin plate trimming apparatus according to the present invention.
[0010]
First, the lead frame sheet (thin plate) will be described with reference to FIGS. The lead frame sheet 1 has a plurality of lead frames 2 and an outer frame 3 provided on the outer side of the lead frame 2, and a large number of the lead frame sheets 1 are arranged in layers with interleaving paper 5 interposed therebetween.
[0011]
Next, a thin plate trimming apparatus will be described. As shown in FIGS. 1 to 3, the trimming apparatus 10 stacks and places a large number of lead frame sheets 1, and places a correction table 11 for positioning the lead frame sheets 1 and the lead frame sheets 1. And a trimming table 12 for trimming.
[0012]
In this case, on the correction table 11, a large number of lead frame sheets 1 are stacked and placed with the interleaving paper 5 interposed between the lead frame sheets 1. The trimming table 12 is used to place the lead frame sheets 1 one by one and trim the outer frame 3 from the lead frame sheet 1.
[0013]
Further, on the downstream side of the trimming table 12, a transfer table 13 is provided for receiving the lead frame 2 whose outer frame 3 is trimmed by the trimming table 12 and transferring it outward.
[0014]
Further, a ball screw (screw rod) 15 extends linearly above the correction table 11, the trimming table 12 and the transfer table 13, and the ball screw 15 has a supply head (suction head) 16 and a transport head (suction head). ) 18 is attached to each. The supply head 16 and the transport head 18 have suction portions 17 and 19 for sucking the lead frame sheet 1 or the lead frame 2, respectively, and the supply head 16 and the transport head 18 are driving units for moving along the ball screw 15. 16a and 18a, respectively.
[0015]
Next, the correction table 11 will be further described with reference to FIGS. As shown in FIGS. 2 and 3, when the direction of the ball screw 15 is the x direction, the correction table 11 has a y direction orthogonal to the x direction, and the correction table 11 is movable in the y direction and It can be rotated in the θ direction around the reference point 22.
[0016]
That is, the correction table 11 includes a rail 29 provided on the frame 31 in the y direction, a y table 26 that slides on the rail 29 via the receiving portion 28, and a reference point 22 on the y table 26. And a rotating θ table 21.
[0017]
Among them, the y table 26 is driven on the rail 29 by a motor and a ball screw. A pallet guide 23 is mounted on the θ table 21, and a pallet 24 on which a laminated body of the lead frame sheet 1 and the interleaf sheet 5 is placed on the θ table 21 along the pallet guide 23.
[0018]
As shown in FIG. 3, a slip sheet removing table 32 is provided in the vicinity of the correction table 11 in a direction perpendicular to the ball screw 15, and a slip sheet removing head 33 is provided on the slip sheet removing table 32 via a retractable arm 34. Is attached so that it can freely move forward and backward.
[0019]
The slip sheet removing head 33 sucks and removes only the slip sheet 5 from the laminated body of the lead frame sheet 1 and the slip sheet 5, and is combined with the suction action of the lead frame 1 by the suction portion 17 of the supply head 16. The suction action of the interleaving paper 5 by the paper removal head 33 is performed alternately.
[0020]
As shown in FIG. 1, a camera 35 is provided on the correction table 11 to take an image of the laminated body of the lead frame sheet 1 and the interleaf sheet 5 from above. A signal from the camera 35 is input to the control unit 36, and the y table 26 and the θ table 21 are driven by the control unit 36. The supply head 16 is also driven by the control unit 36.
[0021]
Next, the operation of the present embodiment having such a configuration will be described.
[0022]
First, as shown in FIGS. 1 to 3, a laminated body of the lead frame sheet 1 and the interleaving paper 5 is arranged on the θ table 21 of the correction table 11. In this case, the laminated body of the lead frame sheet 1 and the interleaving paper 5 is placed on the pallet 24, and the pallet 24 is positioned in contact with the pallet guide 23.
[0023]
Next, the laminated body of the lead frame sheet 1 and the interleaving paper 5 is imaged by the camera 35 and the position thereof is confirmed. A signal from the camera 35 is sent to the control unit 36, and the position of the laminated body of the lead frame sheet 1 and the interleaving paper 5 is corrected by the control unit 36.
[0024]
That is, when the laminated body of the lead frame sheet 1 and the interleaving paper 5 is displaced in the y direction and the θ direction, the control unit 36 drives the y table 26 and the θ table 21 to position the laminated bodies 1 and 5. Correct.
[0025]
When the laminated body of the lead frame sheet 1 and the interleaving paper 5 is displaced in the x direction, the positions of the laminated bodies 1 and 5 are corrected by the drive unit 16a of the supply head 16, as will be described later.
[0026]
Next, the suction portion 17 of the supply head 16 descends to the side of the laminate of the lead frame sheet 1 and the interleaving paper 5 and sucks the lead frame sheet 1 from the laminates 1 and 5.
[0027]
Thereafter, the suction portion 17 is raised, the supply head 16 is moved along the ball screw 15 by the driving portion 16a, and the lead frame sheet 1 is conveyed to the trimming table 12 side. In this case, when the laminated body of the lead frame sheet 1 and the interleaving paper 5 is displaced in the x direction on the correction table 11, the drive unit 16 a of the supply head 16 is controlled by the control unit 36. That is, the position of the supply head 16 is adjusted on the ball screw 15 extending in the x direction, and the deviation of the lead frame sheet 1 in the x direction is corrected.
[0028]
Thereafter, the adsorbing portion 17 is lowered, and the lead frame sheet 1 is placed on the trimming table 12, and the lead frame sheet 1 is accurately positioned on the trimming table 12 in the x, y, and θ directions. Thereafter, the lead frame sheet 1 is trimmed on the trimming table 12, and the outer frame 3 is removed from the lead frame sheet 1. The lead frame 2 from which the outer frame 3 has been removed is then sent to the transfer table 13 side by the suction portion 19 of the transport head 18.
[0029]
During this time, after the lead frame sheet 1 on the correction table 11 is conveyed by the suction unit 17 of the supply head 16, the interleaf removal head 33 extends onto the correction table 11 and is located above the lead frame sheet 1. Remove.
[0030]
As described above, according to the embodiment of the present invention, the lead frame sheet 1 can be positioned with high accuracy and the structure of the correction table 11 can be simplified. Further, since the supply head 16 and the transport head 18 are moved along the ball screw 15, the lead frame sheet 1 and the lead frame 2 are compared with the case where a single head is attached to the ball screw 15. Transport can be performed efficiently.
[0031]
【The invention's effect】
As described above, according to the present invention, the correction table is moved in the y direction and rotated in the θ direction, and the feeding head is moved on the screw rod extending in the x direction, so that the thin plate is accurately adjusted on the trimming table. It can be positioned well. In this case, since it is not necessary to move the correction table in the x direction, the structure of the correction table can be simplified.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of a thin plate trimming apparatus according to the present invention.
FIG. 2 is a front view of a correction table.
FIG. 3 is a plan view showing a correction table and a trimming table.
FIG. 4 is a plan view showing a lead frame sheet and a slip sheet.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Thin plate trimming apparatus 11 Correction table 12 Trimming table 13 Transfer table 15 Ball screw 16 Supply head 16a Drive part 17 Suction part 18 Transport head 18a Drive part 19 Suction part

Claims (3)

A correction table for placing and positioning a thin plate;
A trimming table for performing trimming by placing a thin plate positioned by a correction table;
A screw rod extending between the correction table and the trimming table;
A transport device that moves along the screw rod and supplies the thin plate on the correction table to the trimming table;
When the direction of the screw rod is the x direction, the correction table is movable in the y direction orthogonal to the x direction, and is rotatable in the θ direction around the reference point. Trimming device.   The conveying device has at least a pair of suction heads that engage with the screw rods, the screw rods are fixed, and each suction head has a drive unit that moves the suction heads along the screw rods. The thin plate trimming apparatus as described. A plurality of thin plates on the correction table are laminated with interleaving paper interposed therebetween,
2. The thin plate trimming apparatus according to claim 1, wherein an interleaving sheet removing head for removing interleaving sheets is provided in the vicinity of the correction table so as to be movable forward and backward with respect to the correction table.

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