JP2004090005A - Lead working press mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lead working press mechanism which is used to work a lead of electronic components to flexibly cope with any change of a work, a pressing condition or the like. <P>SOLUTION: The lead working press mechanism comprises a CPU 1, press units 5, 6 and 7 connected to the CPU 1 via each main control signal feed line 4 and having an electronic cam, servo motors 8, 11 and 14, motor drivers 9, 12 and 15, and motion controllers 10, 13 and 16 having the servo and sequence control function provided on the press units 5, 6 and 7, respectively, and a distributor 18 connected to the motion controller 10 via a sub control signal feed line 17. The motion controllers 13 and 16 are connected to the distributor 18 via the sub control signal feed lines 19 and 20. The press units 6 and 7 are synchronized with the press unit 5, and the press units 5, 6 and 7 are individually controlled by the motion controllers 10, 13 and 16, and operated by using the electronic cam. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a lead working press mechanism used for cutting or bending leads of an electronic component.
[0002]
[Prior art]
Conventionally, when performing processing such as cutting or bending of a lead on a molded product after a semiconductor chip mounted on a lead frame is sealed with a resin, a press mechanism having a mechanical cam mechanism is used. I have.
[0003]
However, according to the conventional press having a mechanical cam mechanism, when changing the timing of the vertical movement or the type of the lead frame, it is necessary to manufacture a new cam and exchange / adjust the cam. . In addition, when the number of presses per minute (SPM; Shot Per Minute) is changed, there is a problem that the speed, torque and the like during processing change. In addition, when adding a press unit, it is necessary to manufacture a new cam.
[0004]
The present invention has been made to solve the above-described problem, and has as its object to provide a press mechanism for lead processing that can flexibly respond to changes in a workpiece, pressing conditions, and the like.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned technical problem, a press mechanism for lead processing according to the present invention is used when processing leads of an electronic component, and has one or a plurality of units for performing a press operation. A press mechanism, comprising: a tool provided in one or a plurality of units for use in processing; and a main controller for generating a main signal, wherein the one or more units are each received from the main controller. The press operation is performed by the electronic cam based on the main signal.
[0006]
According to this, the pressing operation is performed by the electronic cam instead of the mechanical cam. Therefore, even when the workpiece and the press conditions are changed, it is possible to flexibly cope with the change of the software without performing the manufacture and the exchange / adjustment work of the cam. Further, even when the number of presses per minute (SPM) is changed, it is possible to stabilize the processing speed, torque and the like. Further, it is possible to prevent troubles caused by wear of mechanical parts.
[0007]
Further, the press mechanism for lead processing according to the present invention is used when processing leads of an electronic component, and is a press mechanism for lead processing having a plurality of units for performing a press operation. Tools each provided for use in processing, a main controller for generating a main signal, and a main unit for performing a pressing operation based on a main signal received from the main controller and supplying a sub signal among a plurality of units. A plurality of units other than the main unit, the sub-unit performing a pressing operation in synchronization with the main unit based on the main signal received from the main controller and the sub-signal received from the main unit. In addition, the plurality of units each perform a press operation by an electronic cam.
[0008]
According to this, the sub unit is synchronized with the main unit based on the sub signal received from the main unit, and each unit operates using the electronic cam. This makes it possible to easily realize a press mechanism having a sub-unit synchronized with the main unit even when adding a unit for performing a press operation.
[0009]
In the press mechanism for lead processing according to the present invention, in the above-described press mechanism, the plurality of units each include a sub-controller for controlling the plurality of units, and the sub-controller of the main unit includes a sub-signal. And the sub-controllers of the sub-units receive the sub-signal and operate the sub-unit in synchronization with the main unit based on the sub-signal.
[0010]
According to this, the sub-signals are generated by the sub-controllers of the main controller, and the sub-controllers provided in the respective sub-units receive the sub-signals. Thus, each sub-unit is controlled by the sub-controller in synchronization with the main unit based on the sub-signal, and each sub-unit is individually controlled by the sub-controller.
[0011]
Further, in the press mechanism for lead processing according to the present invention, in the press mechanism, the main unit includes a sub-controller, the sub-controller generates a sub-signal, the sub-unit receives the sub-signal, and The sub-unit is operated in synchronization with the main unit based on the sub-signal.
[0012]
According to this, the sub signal is generated by the sub controller provided in the main unit, and the sub units are respectively controlled in synchronization with the main unit based on the sub signal.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
(1st Embodiment)
Hereinafter, a first embodiment of a press mechanism for lead processing according to the present invention will be described with reference to FIG. FIG. 1 is a block diagram schematically showing a press mechanism for lead processing according to the present embodiment.
[0014]
As shown in FIG. 1, the CPU 1 is a main controller that controls the operation of a lead processing press mechanism connected to an operation touch panel 3 via a bus 2. The CPU 1 is connected to each of the press units 5, 6, and 7 by a main control signal supply line 4. The press unit 5 includes a servo motor 8, a motor driver 9, and a motion controller 10. Similarly, the press unit 6 includes a servo motor 11, a motor driver 12, and a motion controller 13, and the press unit 7 includes a servo motor 14, a motor driver 15, and a motion controller 16, respectively. Each of the motion controllers 10, 13, and 16 is a sub-controller having software servo control functions and sequence control functions for the servo motors 8, 11, and 14, respectively.
[0015]
Each of the press units 5, 6, and 7 performs a press operation by control based on software using the servomotors 8, 11, and 14 and the electronic cam. Although not shown, a reciprocating mechanism is connected to each of the rotating shafts of the servomotors 8, 11, and 14, and each reciprocating mechanism has a tool for cutting or bending the lead of the electronic component. It is connected.
[0016]
Although not shown, the CPU 1 uses another control signal supply line to supply the molded product after resin sealing the semiconductor chip to the press mechanism and to carry out the molded product after lead processing from the press mechanism. It is connected to the transport mechanism. As will be described later, this configuration eliminates the need for a pulse oscillator, a cam positioner, and the like for detecting the rotation of the shaft of each of the press units 5, 6, and 7.
The motion controller 10 is connected by a sub-control signal supply line 17 to, for example, a distributor 18 composed of a gate array. The distributor 18 is connected to the motion controllers 13 and 16 by sub-control signal supply lines 19 and 20, respectively. The distributor 18 is connected to the CPU 1 by a sub-control signal supply line 21.
[0017]
Hereinafter, the operation of the lead processing press mechanism according to the present embodiment will be described. First, an operator issues a command for an operation using the touch panel 3. Based on the command, the CPU 1 supplies a main control signal to each of the motion controllers 10, 13, and 16 via the main control signal supply line 4. Here, the motion controller 10 generates a sub control signal based on the received main control signal, and supplies the sub control signal to the distributor 18 via the sub control signal supply line 17. The distributor 18 distributes the received sub-control signals and supplies them to the motion controllers 13 and 16 via sub-control signal supply lines 19 and 20, respectively. Each of the motion controllers 10, 13, and 16 drives each of the motor drivers 9, 12, and 15 to rotate the rotation axis of each of the servo motors 8, 11, and 14. As a result, the press units 5, 6, and 7 are individually controlled using the electronic cam to perform lead cutting, bending, and the like. For example, the individual lead can be cut by the press unit 5, the individual lead can be bent by the press unit 6, and the suspension lead can be cut by the press unit 7. Further, by further increasing the number of press units, the bending of the individual lead can be performed in a plurality of times.
[0018]
The distributor 18 feeds back the distributed sub-control signal to the CPU 1 via the sub-control signal supply line 21. The CPU 1 determines the degree of rotation of the shaft of each of the press units 5, 6, and 7 based on the sub control signal, and generates a signal for driving a transport mechanism (not shown). Therefore, as described above, a pulse oscillator, a cam positioner, and the like for detecting the rotation of the shaft of each of the press units 5, 6, and 7 are not required.
[0019]
Here, the feature of the press mechanism for lead processing according to the present embodiment is that the sub control signal generated by the motion controller 10 is distributed and the sub control signal is supplied to the motion controllers 13 and 16. Accordingly, the press units 6 and 7 including the motion controllers 13 and 16 synchronize with the press unit 5 including the motion controller 10 based on the main control signal received from the CPU 1 and the sub control signal received from the distributor 18. Works. Therefore, the press unit 5 becomes the main unit, and the press units 6 and 7 become the sub units, and the press units 6 and 7 synchronize with the press unit 5. In addition, the press units 5, 6, and 7 are individually controlled by the motion controllers 10, 13, and 16 based on the respective software, and operate using the electronic cam.
[0020]
As described above, according to the present embodiment, the press units 6 and 7 operate using the electronic cams in synchronization with the press unit 5, respectively, and individually control the press units 5, 6, and 7. be able to. Therefore, first, even in the case of changing the timing of the vertical movement and the type of the lead frame, it is possible to flexibly cope with the change of the software without performing the mechanical cam production and the exchange / adjustment work. it can. Second, since a mechanical cam is not used, even when the number of presses per minute (SPM) is changed, it is possible to stabilize the processing speed and torque. Third, even when an additional press unit is added, it can be easily handled by supplying the sub-control signal distributed by the distributor 18. Fourth, since a mechanical cam is not used, troubles caused by wear of mechanical parts can be prevented. Fifth, since the motion controllers 10, 13, and 16 are provided in the press units 5, 6, and 7, respectively, adjustment by software can be performed for each press unit.
[0021]
In the above description of the present embodiment, a case in which three press units are used has been described. The present invention is not limited to this, and the number of press units can be increased or decreased. Even when the number of press units is further increased, the same effect can be obtained by performing adjustment by software as necessary. In addition, even when the number of the press units is one, the above-described first to fourth effects can be obtained.
[0022]
(Second embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to FIG. FIG. 2 is a block diagram schematically showing a press mechanism for lead processing according to the present embodiment.
[0023]
As shown in FIG. 2, this embodiment has a configuration in which the motion controllers 13 and 16 are removed from the subunits 6 and 7 of FIG. 1 in the first embodiment. Therefore, the distributor 18 is connected to the motor drivers 12 and 15 by the sub-control signal supply lines 19 and 20, respectively.
[0024]
The operation of the lead processing press mechanism according to the present embodiment is as follows. The motion controller 10 generates a sub control signal based on the received main control signal, and supplies the sub control signal to the distributor 18 via the sub control signal supply line 17. The distributor 18 distributes the received sub-control signals and supplies them to the motor drivers 12 and 15 via the sub-control signal supply lines 19 and 20, respectively. Then, the motion controller 10 drives the motor driver 9 to rotate the rotation axis of the servo motor 8, and the motor drivers 12, 15 rotate the rotation axes of the servo motors 11, 14, respectively. Therefore, the press unit 5 becomes the main unit, the press units 6 and 7 become the sub units, and the press units 6 and 7 operate using the electronic cams in synchronization with the press unit 5, respectively.
[0025]
Here, the feature of the lead processing press mechanism according to the present embodiment is that one motion controller 10 generates a basic signal for rotating the rotation axes of the servo motors 8, 11, and 14, respectively. is there. Thus, according to the present embodiment, the same effects as those of the first embodiment can be obtained except that adjustment by software for each press unit is impossible. Further, since each servo motor 8, 11, 14 is controlled by one motion controller 10 as compared with the first embodiment, the mechanism can be simplified and the cost can be reduced.
[0026]
In the above description of the present embodiment, a case in which three press units are used has been described. The present invention is not limited to this, and the number of press units can be increased or decreased. Then, even when the number of press units is further increased, adjustment by software can be performed corresponding to the increased number of press units. Thus, the same effects as in the first embodiment can be obtained except that adjustment by software for each press unit is impossible.
[0027]
Further, the press mechanism for lead processing according to each embodiment is applicable to a strip-shaped lead frame and a continuous lead frame called a hoop.
[0028]
Further, the present invention is not limited to the above-described embodiments, and can be arbitrarily and appropriately changed / selected as needed and adopted without departing from the spirit of the present invention. .
[0029]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, when changing a workpiece, press conditions, etc., it can respond flexibly by a change of software, without performing manufacture of a cam and exchange / adjustment work. Even when the number of presses per minute (SPM) is changed, it is possible to stabilize the processing speed, torque, and the like. Further, it is possible to prevent troubles caused by wear of mechanical parts. Therefore, the present invention has an excellent practical effect of providing a press mechanism for lead processing capable of flexibly responding to changes in a workpiece and pressing conditions.
[Brief description of the drawings]
FIG. 1 is a block diagram schematically showing a press mechanism for lead processing according to a first embodiment of the present invention.
FIG. 2 is a block diagram schematically showing a lead processing press mechanism according to a second embodiment of the present invention.
[Explanation of symbols]
1 CPU (main controller)
2 Bus 3 Touch panel 4 Main control signal supply line 5 Press unit (main unit)
6,7 Press unit (sub-unit)
8, 11, 14 Servo motors 9, 12, 15 Motor drivers 10, 13, 16 Motion controllers (sub-controllers)
17, 19, 20, 21 Sub-control signal supply line 18 Distributor

Claims (4)

A press mechanism for lead processing, which is used when processing leads of an electronic component and has one or a plurality of units performing a pressing operation,
A tool provided in the one or more units and used for the processing,
A main controller for generating a main signal,
The one or more units each perform a pressing operation by an electronic cam based on the main signal received from the main controller, and a press mechanism for lead processing. A press mechanism for lead processing, which is used when processing leads of an electronic component and has a plurality of units performing a pressing operation,
A tool provided in each of the plurality of units and used for the processing,
A main controller for generating a main signal;
A main unit that performs a pressing operation based on the main signal received from the main controller among the plurality of units and supplies a sub signal,
A unit other than the main unit among the plurality of units, and performs a pressing operation in synchronization with the main unit based on the main signal received from the main controller and the sub signal received from the main unit. And a sub-unit for performing
A press mechanism for lead processing, wherein each of the plurality of units performs a press operation by an electronic cam. The press mechanism for lead processing according to claim 2,
The plurality of units each include a sub-controller that controls the plurality of units,
The sub-controller of the main unit generates the sub-signal, and the sub-controller of each of the sub-units receives the sub-signal and operates the sub-unit in synchronization with the main unit based on the sub-signal. And a press mechanism for lead processing. The press mechanism for lead processing according to claim 2,
The main unit includes a sub-controller,
The sub-controller generates the sub-signal, and the sub-unit receives the sub-signal and operates the sub-unit in synchronization with the main unit based on the sub-signal. Press mechanism.

Images