JPH04109580A - Device for crimping terminal to wire - Google Patents

Abstract

PURPOSE:To carry out successive crimping work of high reliability by performing the feedback control of pressure applied to a crimping die when performing crimping work as plural kinds of wires and plural kinds of terminals are combined to each other. CONSTITUTION:In a terminal crimping device 3, a pressure sensor 8 for detecting pressure applied to a crimping die 7 is installed between the press ram 6 of a terminal crimping mechanism 4 and the crimping die 7 driven by air pressure, a value detected by the pressure sensor 8 is compared to a preinput maximum pressure value, and the pressure is adjusted in order to equalize the detected value to the input value, thereby crimping terminal 2 to wire 1 can be constantly performed with stable pressure. The condition of combination of wire 1 and terminal 2 in order of processing and the maximum pressure for crimping which forms predetermined crimp height H according to the condition of combination are both stored in advance in a main control portion 14 whereby crimping work can be automatically carried out even with combinations of wire 1 and terminal 2 of different kinds.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a terminal crimping device for crimping a terminal to an electric wire,
Especially when crimping is performed by combining multiple types of electric wires and multiple types of terminals, terminal crimping on electric wires enables highly reliable continuous crimping by feeding back the pressure applied to the crimping die. It relates to techniques that are effective when applied to devices.

[Prior Art] Conventionally, as a terminal crimping device for crimping a terminal onto an electric wire, a crimping die driven by a hydraulic drive system is used, for example, as disclosed in Japanese Patent Application Laid-open No. 185878/1983. There is a terminal crimping device that crimps a U-shaped terminal on a crimping section.

The outline consists of a terminal crimping mechanism using a hydraulic drive system, a hydraulic control mechanism that automatically controls the drive of this terminal crimping mechanism based on the maximum oil pressure value, and a hydraulic control mechanism that detects the bottom dead center position of the crimping type of the terminal crimping mechanism. It consists of a dead center detection section and a feedback mechanism that feeds back position information from the bottom dead center detection section to the hydraulic control mechanism.

Then, the terminal crimping mechanism is driven based on the combination condition of the terminal and the electric wire inputted in advance to the hydraulic control mechanism and the maximum hydraulic pressure value based on this combination condition, and thereby the terminal is crimped to the electric wire in a predetermined combination. Ru. At the same time, the maximum oil pressure value is corrected by detecting the bottom dead center position of the bottom dead center detector, and crimping is performed continuously based on the corrected maximum oil pressure value.

[Problems to be Solved by the Invention] However, in the prior art as mentioned above, the terminal crimping mechanism is driven by a hydraulic drive system, and the control condition of the hydraulic control mechanism is set to the maximum hydraulic pressure value. The disadvantage is that it cannot be used for anything other than a type drive device.

In addition, since the detection condition of the bottom dead center detection unit is the displacement position, for example, when combining different types of terminals and wires, the displacement position setting will be different depending on each combination, and the setting position will be changed accordingly. There is a drawback that it must be done.

Therefore, the conventional terminal crimping device cannot be well applied to crimping combinations of many types of terminals and electric wires, and is also limited to hydraulic drive systems.

Therefore, an object of the present invention is to provide an electric wire that can be applied to drive systems other than hydraulic drive, that can automatically set the maximum pressing force for crimping and crimp height, and that can obtain stable crimping quality in a wide variety of combinations. An object of the present invention is to provide a terminal crimping device.

The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

[Means for Solving the Problems] Among the inventions disclosed in this application, a brief overview of typical inventions is as follows.

That is, the terminal crimping device for electric wires of the present invention includes a plurality of types of electric wires and terminals, a crimping die for crimping the terminals to these electric wires, a drive mechanism for driving the crimping die, and a control for controlling the drive mechanism. A terminal crimping device that drives a crimping die based on control of a drive mechanism by a control mechanism and crimps terminals to electric wires in a predetermined combination, the terminal crimping device comprising: a combination condition of electric wires and terminals for each processing permutation; Based on this combined condition, the maximum pressure for crimping that forms a predetermined crimp height is input into the control mechanism in advance, and the pressure applied to the crimping die is detected by a pressure detection means and fed back to the control mechanism. The quality of the crimping condition is determined based on the pressure, and the maximum pressing force for crimping of the control mechanism is corrected to sequentially and continuously perform the crimping process.

[Function] According to the terminal crimping device for electric wires described above, when the crimping process is executed, the pressure force applied to the crimping die is detected by the pressure detection means, and this detected value and the maximum pressure force for crimping inputted in advance are used. The crimp height is compared to determine whether the crimp condition is good or bad, and the pressure is adjusted so that both are the same.The pressing force, which is the determining factor of crimp height, is directly detected, and the wire is always bonded with a stable pressing force. Terminal crimping can be performed.

This stabilizes the crimping quality and makes it possible to improve the crimping reliability.

In this case, the combination conditions of electric wires and terminals for each processing sequence and the maximum pressure for crimping based on these combination conditions are manually input to the control mechanism in advance, so that crimping processes for different combinations can be automatically performed. I can do it. This makes it possible to perform a wide range of crimping processes in a wide variety of combinations.

[Embodiment] Fig. 1 is a configuration diagram showing a terminal crimping device for electric wires which is an embodiment of the present invention, Fig. 2 is a front view showing a terminal crimping state in the terminal crimping device of this embodiment, and Fig. FIG. 3 is a flowchart showing the crimping process procedure by the terminal crimping device of this embodiment, and FIGS. 4(a) and (b) are front views showing changes in the crimped state of the terminal by the terminal crimping device of this embodiment. .

First, the configuration of the terminal crimping device of this embodiment will be explained with reference to FIG.

The terminal crimping device of this embodiment is, for example, a terminal crimping device 3 that performs crimping according to the combination of multiple types of electric wires 1 and multiple types of terminals 2 using a pneumatic drive method. Mechanism (drive mechanism) 4;
It is composed of a pressurizing force control mechanism (control mechanism) 5 that automatically controls the drive of this terminal crimping mechanism 4, and the pressurizing force controlling mechanism 5 is controlled based on the pressurizing force directly in front of the crimped electric wire 1 and terminal 2. It is something that

The terminal crimping mechanism 4 includes a press ram 6 on the drive side, a crimping die 7 driven by air pressure, and a pressure sensor (pressure detection means) 8 for detecting the pressing force applied to the crimping die 7. 8 is attached between the press ram 6 and the crimping die 7.

Further, an anvil 9 is fixed to the pedestal side of the terminal crimping mechanism 4, and a zero-shaped terminal 2 to be crimped, for example, is placed on the anvil 9, and an electric wire l is inserted into the terminal 2. Later, the crimp die 7 is lowered, and the terminal 2 is attached to the wire 1 due to deformation.
By being wrapped around it, it is crimped into the shape shown in FIG.

Further, a displacement sensor 10 and a detection plate 11 accompanying the press ram 6 are attached to the terminal crimping mechanism 4, so that the displacement of the detection plate 11 is detected by the displacement sensor 10 to judge whether the crimp height of the terminal 2 is good or bad. It has become.

The pressure control mechanism 5 includes a control valve 12 that controls air pressure to the terminal crimping mechanism 4, a valve control section 13 that controls opening and closing of the control valve 12, and automatically controls the driving of the valve control section 13.
It is comprised of a main control section 14 to which the outputs of the pressure sensor 8 and displacement sensor 10 are input, and an external control section 15 that inputs data to the main control section 14 and displays abnormalities to the outside.

The main control unit 14 is provided with machining sequences of electric wires 1 with a plurality of dimensions and terminals 2 with a plurality of dimensions and shapes, machining conditions such as the wire length and machining shape for each machining sequence, and machining conditions such as the wire length and machining shape for each machining sequence. The maximum pressure force for crimping required to form a predetermined crimp/'%ite is stored based on the combination conditions of the electric wire 1 and the terminal 2 for each permutation, and the pressure force of the terminal crimping mechanism 4 is stored for each permutation. is automatically set, and when the crimping process is executed, the pressing force detected by the pressure sensor 8 and the main control unit 1
The maximum pressing force for crimping stored in step 4 is compared, and the crimping process is performed at the same pressing force.

Moreover, the maximum pressing force for crimping stored in the main control unit 14 is
The pressure is always corrected to the optimum pressure based on the pressure detected by the pressure sensor 8, and the opening/closing state of the control valve 12 is controlled by the valve control unit 13 accordingly, thereby making it possible to perform crimping processing with a stable pressurizing force at all times. ing.

Further, the displacement output detected by the displacement sensor 10 is input to the main control section 14, and after being converted into a crimp hide, it is compared with a predetermined crimp height to determine whether the crimp condition is good or bad.

Next, the operation of this embodiment will be explained with reference to FIG.

First, wire 1 is placed on terminal 2 placed based on the processing order.
is inserted, according to the combination conditions of the electric wire 1 and the terminal 2 instructed by the external control unit 15 (step 301),
The main control unit 14 determines a predetermined crimp height and required maximum pressing force by comparing with pre-stored combination condition data (step 302).

Next, the main control section 14 instructs the valve control section 13 to control the control valve 12 based on the determined maximum pressure (step 303), and the terminal crimping mechanism 4
The press ram 6 is lowered to start the crimping process (step 304). When the crimping die 7 contacts the terminal 2 following the descent of the press ram 6, a pressing force is detected by the pressure sensor 8, and this pressing force is fed back to the main control section 14 (step 305).

Furthermore, the main control unit 14 compares the pressurizing force fed back by the pressure sensor 8 with the maximum pressurizing force stored in advance (step 306), and if they are different, the control valve 1
Step 307) to control the open/close state of the press ram 6 (step 307), and when both become the same, the valve controller 13 instructs the valve controller 3 to control the control valve 12 to stop the press ram 6 (step 308). At this time, the electric wire 1 and the terminal 2 are crimped to a crimp height H as shown in FIG.

In this case, the main control unit 14 reads the output of the displacement sensor 10, converts it into a crimp height, and then compares it with a predetermined crimp height H (Step 309). In this case, an NG signal indicating that the product is defective is sent to the external control section 11 (15).
Step 31]), for example, the operator can be informed of whether the crimping condition is good or bad by displaying it on a monitor.

Thereafter, the press ram 6 is returned to its original position by the valve control unit 13, and crimping is performed in sequence. At this time, if the crimping condition is judged to be good, the crimping process is continued using the stored maximum pressure of the crimp; on the other hand, if it is judged to be poor, the crimping process continues using the maximum pressure stored in the main control unit 14. The pressurizing force is corrected based on the pressure detected by the pressure sensor 8 (step 312), and the crimping process can be continuously performed with a constant pressurizing force.

Therefore, according to the terminal crimping device 3 of this embodiment, a pressure sensor 8 is provided between the press ram 6 of the terminal crimping mechanism 4 and the crimping die 7 driven by air pressure to detect the pressure applied to the crimping die. By being attached, the pressure sensor 8
The detected value is compared with the maximum pressing force manually applied in advance, and the pressure is adjusted so that both are the same, so that the terminal 2 can be crimped to the electric wire 1 with a stable pressing force at all times.

Furthermore, the combination conditions of the wire 1 and the terminal 2 for each processing sequence and the maximum pressure for crimping that forms a predetermined crimp height (H) based on the combination conditions are stored in advance in the main control unit 14, so that the type Even in combinations of electric wires 1 and terminals 2 with different values, the crimping process can be automatically performed.

Above, the invention made by the present inventor has been specifically explained based on examples, but the present invention is not limited to the above-mentioned examples, and it is understood that various changes can be made without departing from the gist of the invention. Needless to say.

For example, although the terminal crimping device 3 for electric ml according to this embodiment is a terminal crimping mechanism 4 driven by a pneumatic drive system, the present invention is not limited to the above embodiment. For example, by replacing the control valve 12 with a motor and the valve control section 13 with a motor control section, the terminal crimping device 3 is electrically driven by a motor.
It is also applicable to It goes without saying that the present invention can also be applied to a conventional hydraulically driven terminal crimping device 3.

Furthermore, in the terminal crimping device 3 of this embodiment, the case where the electric wire 1 is crimped to the U-shaped terminal 2 has been described.
For example, as shown in FIGS. 4(a) and 4(b), the shape of the terminal 2 and the Various changes can be made to the shape of the crimping process, etc.

[Effects of the Invention] Among the inventions disclosed in this application, the effects obtained by typical inventions are briefly explained below.

(1) Combination conditions for electric wires and terminals for each processing sequence,
Based on this combined condition, the maximum pressing force for crimping to form a predetermined crimp height is manually input to the control mechanism in advance, and the pressing force applied to the crimping mold is detected by a pressure detection means and fed back to the control mechanism. In addition to determining whether the crimp condition is good or bad based on the pressure, by correcting the maximum pressure for crimping of the control mechanism and performing the crimping process, the pressure, which is a determining factor of crimp height, is directly detected by the pressure detection means. The maximum pressing force for crimping of the control mechanism is corrected to the optimum pressing force, so it can always be operated with a stable pressing force.
Terminals can be crimped onto wires.

(2) 4 According to (1) above, the combination conditions of electric wires and terminals for each processing permutation and the maximum pressure for crimping based on these combination conditions can be manually input into the control mechanism in advance, so that it is possible to It is possible to automatically perform crimping in different combinations with multiple types of terminals.

(3) With (1) and (2) above, it is possible to continuously perform a wide range of crimping processes in a wide variety of combinations, and at the same time, the quality of crimping between wires and terminals is stabilized, resulting in highly reliable crimping processes. Thus, it is possible to obtain a device for crimping terminals onto electric wires.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram showing a terminal crimping device for electric wires which is an embodiment of the present invention, Fig. 2 is a front view showing a terminal crimping state in the terminal crimping device of this embodiment, and Fig. 3 is a diagram showing the present embodiment. A flowchart showing the crimping process procedure by the terminal crimping device of the example. FIGS. 4(a) and 4(b) are front views showing changes in the crimping state of the terminal by the terminal crimping device of the present embodiment. 1... Electric wire, 2... Terminal, 3... Terminal crimping device,
4... Terminal crimping mechanism (drive mechanism), 5... Pressure control mechanism (control mechanism), 6... Press ram, 7... Crimping type, 8... Pressure sensor (pressure detection means), 9...
Anvil, 10... displacement sensor, 11... detection plate,
DESCRIPTION OF SYMBOLS 12... Control valve, 13... Valve control part, 14... Main control part, 15... External control part, H... Talinbu height. Agent Patent Attorney Dai Kazutsui 3: Terminal pressure! 1 position f: Tsuji N Hotaru 8: Pressure sensor (pressure detection means) (a) (b) -6 points-

Claims (1)

[Claims] 1. A plurality of types of electric wires and terminals, a crimping die for crimping the terminal to the electric wire, a drive mechanism for driving the crimping die, and a control mechanism for controlling the drive mechanism, the drive mechanism being controlled by the control mechanism. A terminal crimping device that drives the crimping die based on control of the crimping die and crimps the terminal to the electric wire in a predetermined combination, the terminal crimping device comprising: a combination condition of the electric wire and the terminal for each processing permutation; and a combination condition based on the combination condition. The maximum pressurizing force for crimping that forms a predetermined crimp height is input into the control mechanism in advance, and the pressurizing force applied to the crimping mold is detected by the pressure detection means and fed back to the control mechanism, and the pressurizing force is 1. A terminal crimping apparatus for electric wires, characterized in that the terminal crimping apparatus for electric wires is characterized in that the quality of the crimping state is determined based on the quality of the crimping state, and the maximum pressure for crimping of the control mechanism is corrected to sequentially and continuously perform the crimping process.