JP2000195641A - Terminal crimping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal crimping device capable of rapidly and accurately adjusting the height of a crimping terminal to an aimed height and a terminal crimping device capable of rapidly shifting a control of a pressure terminal from height-based to crush pressure-based. SOLUTION: This terminal crimping device is equipped with a pressing member making crush motion relative to a crimping terminal placed on an anvil of a base block, an adjusting mechanism for adjusting the projecting length of the pressing member, a height-setting part 34 for setting up, as the amount of alteration, a difference between an aimed height of the crimping terminal and an actual height thereof, a pressure sensor 19 for detecting the pressure in the crush motion, a memory part 30b for previously memorizing enclosure deflection information, a pressure recognition means 31a for recognizing pressure change information, and a height-adjustment control means 30 for determining the amount of correction of the projecting length of the pressing member, based on the enclosure deflection information, on the pressure change information, and on the amount of alteration, and thereby adjusting the projecting length of the pressing member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal crimping apparatus, and more particularly to a terminal crimping apparatus capable of setting a height of a crimp terminal to be crushed to a target height.

[0002]

2. Description of the Related Art Conventionally, in a terminal crimping device, a crimp terminal is fed into a concave anvil formed on an upper surface of a base.
The terminal is crimped by crushing the crimp terminal with a pressing member. Specifically, in this terminal crimping device, a support member is provided upright, a guide member is provided above the support member, and a base is provided below the support member. A pressing member protrudes and is attached to a lower end of the guide member, and the guide member and the pressing member move up and down by a power mechanism. That is, when the pressing member moves downward, the crimp terminal is crushed between the tip of the pressing member and the anvil formed on the base.

In a terminal crimping apparatus, a crimp terminal is fed into an anvil of a base in synchronization with a vertical movement of a pressing member. The crimp terminals sent to the anvil are crushed in order,
Each time the crushing is completed, it is replaced with a new crimp terminal.

By the way, before starting the crushing operation or when replacing the crimping terminal to be crushed with a different type,
The following adjustments must be made: That is, the distance between the tip of the pressing member and the anvil must be set to a distance suitable for the size of the crimp terminal. Therefore, in general, the length of the pressing member protruding from the guide member can be appropriately changed. For example, in a device provided with a height adjusting mechanism having a knurled screw-shaped adjusting knob, the protrusion length of the pressing member can be appropriately changed by manually rotating the adjusting knob clockwise or counterclockwise. . As the adjustment work, first, the crimp terminal is placed on the anvil and crushing operation is performed once, and the height (crimp height) of the crimp terminal generated by the crushing operation is measured with a measuring instrument such as a caliper. Then, when the measured height is different from the optimum height, the adjustment knob is manually operated to perform the crushing operation again. Then, the above adjustment operation is performed until the measured height of the crimp terminal matches the optimum height. In this way, by setting the protrusion length of the pressing member so that the height of the crimp terminal becomes the optimum height, the crimp terminal can be securely attached to the end of the wire and crimped without breaking the wire. Can be done.

However, according to the above terminal crimping apparatus, every time the size of the crimp terminal changes, the adjusting knob is operated to perform a crushing operation, and then the height of the crimp terminal generated by the crushing operation is increased. If the height of the crimp terminal is different from the optimal height, the operation of operating the adjustment knob again to perform the crushing operation must be repeated until the height of the crimp terminal matches the optimal height. I had to. Therefore, much time and labor are required for the adjustment work before performing the crushing operation.

Accordingly, the present inventors have developed a terminal crimping apparatus capable of automatically setting the height of a crimp terminal to an optimum value by numerically controlling the length of the pressing member protruding from the lower end of the guide member. Prototype (first prototype). In other words, once the crimping terminal is crushed by the pressing member, the height of the crimping terminal generated by the crushing is measured with a measuring instrument such as a caliper, and the difference between the measured height and the optimum height is input by setting means or the like. The protrusion length of the pressing member is automatically changed by the input length.

On the other hand, in the conventional device, the protruding length of the pressing member is adjusted so that the height of the crimp terminal becomes an optimum height. However, since the height measurement has a large detection error, It has been difficult to accurately control the crimped state of the crimp terminal.

Accordingly, the present inventors have tried to control the crimping state of the crimping terminal by the pressure during the crushing operation, and have prototyped a terminal crimping apparatus capable of automatically adjusting the crushing pressure to an optimum pressure. (2nd prototype). Specifically, a pressure sensor for detecting a pressure in the crushing operation, a pressure setting unit for setting an optimum pressure when pressing the crimp terminal by the pressing member, and a pressure detected by the pressure sensor match the optimum pressure. And pressure adjusting means for adjusting the protruding length of the pressing member. In other words, with the operator inputting the optimum pressure corresponding to the crimp terminal by the pressure setting means and placing the crimp terminal on the anvil of the base,
When an instruction to operate the pressure adjusting means is given, the protrusion length of the pressing member is automatically adjusted so that the pressure detected by the pressure sensor matches the optimum pressure.

[0009]

However, the first prototype, that is, the difference between the measured height of the crimp terminal and the optimum height is determined, and the pressing member is automatically adjusted by the length corresponding to the difference. In the case of correcting the protruding length, even if the protruding length of the pressing member is correctly corrected, the height of the crimp terminal cannot be made to match the optimum height. In other words, when the crimp terminal is pressed by the pressing member, a large outward force acts between the base on which the crimp terminal is mounted and the upper part of the support member on which the guide member is mounted, and the terminal crimping device main body is moved. The supporting column members and the like are slightly bent. In addition, the degree of the bending differs depending on the pressure for pressing the crimp terminal.
For this reason, when correcting the protrusion length of the pressing member, even if the length corresponding to the difference between the current height and the optimum height of the crimp terminal is corrected, the height of the crimp terminal generated by the crushing operation after the correction is It was not the optimal height.

In the second prototype, that is, in the case of adjusting the protrusion length of the pressing member so that the pressure detected by the pressure sensor coincides with the optimum pressure set by the pressure setting means, the adjustment is quickly performed. Although the work can be performed and the crimped state of the crimp terminal can be reliably managed, there are the following inconveniences. In other words, conventionally, the crimping state of the crimping terminal was controlled by the height of the crimping terminal, so that all data relating to the optimum height of the crimping terminal has been recognized. As a result, the optimum pressure for each type of crimp terminal could not be known. For this reason, when this terminal crimping device is introduced, first, the height of the crimp terminal is manually adjusted to the optimum height by the above-described method, and the pressure detected at this time (optimal pressure) is adjusted. I had to measure. Then, this operation has to be repeated for a plurality of crimp terminals, and the transition operation requires much time and labor.

A first object of the present invention is to provide a terminal crimping apparatus capable of quickly adjusting the height of a crimp terminal to a target height and adjusting the height with high accuracy.
An object of the present invention is to provide a terminal crimping apparatus that can quickly shift from management based on the height of crimp terminals to management based on crush pressure.

[0012]

According to a first aspect of the present invention, there is provided a terminal crimping apparatus comprising: a base having an upper surface formed with an anvil;
A support member that stands upright with respect to the base, a guide member that is disposed above the support member and that is supported to move up and down with respect to the base, and that moves the guide member up and down A power mechanism, a pressing member located at the lower end of the guide member, and a crushing operation between the anvil and the crimp terminal mounted on the anvil of the base; and a lower end of the guide member. An adjusting mechanism for adjusting the projecting length of the pressing member projecting downward; height setting means for setting a difference between a target height and an actual height of the crimp terminal as a change amount; and detecting a pressure in the crushing operation. A pressure sensor and a correlation between a pressing force and an amount of extension of the support member with respect to the anvil when the anvil is pressed without placing the crimp terminal on the anvil are stored in advance as housing deflection information. Storage means, operating the adjusting mechanism in a state where the crimp terminal is placed on the anvil, and as a pressure change information, a correlation between a change in the protrusion length of the pressing member and a pressure change detected by the pressure sensor. Pressure recognition means for recognizing, housing bending information stored in the storage means,
Based on the pressure change information recognized by the pressure recognition means, and the change amount set by the height setting means,
A correction amount determining unit that determines a correction amount of the protrusion length of the pressing member; and adjusting the protrusion length of the pressing member by operating the adjustment mechanism based on the correction amount determined by the correction amount determination unit. Height adjustment control means.

Therefore, according to the terminal crimping device of the first aspect of the present invention, first, the crimp terminal is placed on the anvil of the base, and the crimping operation of the crimp terminal is performed once. Then, the height of the crimp terminal generated by the crushing is measured with a measuring instrument such as a caliper, and the difference between the measured height and the target height is obtained. Further, the pressure recognition means is operated to recognize the pressure change information. The pressure change information is a correlation between a change in the protrusion length of the pressing member and a change in pressure detected by the pressure sensor. In order to recognize the pressure change information, the pressure change is recognized by operating the adjusting mechanism, increasing the protrusion length of the pressing member by a certain length, and detecting the amount of pressure change caused by the increase.

Subsequently, the change amount, which is the difference between the measured height (actual height) of the crimp terminal and the target height, is input by the height setting means, and the correction amount determination means and the height adjustment control means are respectively operated. Give instructions to let. The correction amount determination unit is configured to determine the protrusion length of the pressing member based on the housing deflection information stored in the storage unit, the pressure change information recognized by the pressure recognition unit, and the change amount set by the height setting unit. Determine the correction amount. Here, the housing bending information is a correlation between the pressing force and the amount of extension of the support member with respect to the anvil when the anvil is pressed without placing the crimp terminal on the anvil, that is, the support member or the like during crushing. This is information on the amount of elongation of the support member caused by bending. Then, the amount of elongation of the support member with respect to the pressing force is known from the housing bending information, and the pressure change with respect to the change in the protruding length of the pressing member is known from the pressure change information. The amount of change in the height of the crimp terminal itself with respect to pressure is determined by subtracting the amount of extension of the support member from the change in the protrusion length. Therefore, the pressure corresponding to the change amount set by the height setting means is obtained, and the correction amount of the protrusion length of the pressing member with respect to this pressure is determined based on the pressure change information. That is, when the change amount of the height of the crimp terminal is input, the length obtained by adding the extension amount of the support member to the change amount is determined as the correction amount of the protrusion length of the pressing member.

The height adjustment control means operates the adjustment mechanism based on the correction amount thus determined to adjust the projection length of the pressing member. Thereafter, if the crimp terminal is crushed, the height of the crimp terminal is changed by the change amount set by the height setting means, and coincides with the target height.

According to a second aspect of the present invention, there is provided a terminal crimping apparatus.
2. The terminal crimping device according to claim 1, a display unit that displays a pressure detected by the pressure sensor, a pressure setting unit that sets an optimal pressure when the crimp terminal is crushed by the pressing member, and the pressure sensor. 3. The pressure detected at
Pressure adjusting control means for operating the adjusting mechanism to adjust the protruding length of the pressing member so as to match the optimum pressure set by the pressure setting means.

Therefore, according to the terminal crimping device of the second aspect of the present invention, in addition to the operation of the terminal crimping device of the first aspect, the height of the crimp terminal is adjusted to a target height by the height adjustment control means. The crush pressure is detected by the pressure sensor and displayed on the display means. The displayed detected pressure is the optimum pressure at the crimp terminal. As described above, by adjusting the height of the crimp terminal to the optimum height, the optimum pressure is displayed on the display means. Therefore, when shifting from the management based on the height of the crimp terminal to the management based on the crush pressure, the optimum pressure is determined. Can be easily recognized.

Then, when crushing the same type of crimp terminal next time, first, the operator inputs an optimum pressure corresponding to the crimp terminal by the pressure setting means. This optimum pressure is a numerical value displayed on the display means at the time of the previous (first time) adjustment work. Next, when an instruction to operate the pressure adjustment control unit is given in a state where the crimp terminal is placed on the anvil of the base, the pressure adjustment control unit operates the adjustment mechanism.
Here, the adjusting mechanism changes the protruding length of the pressing member that protrudes downward from the lower end of the guide member. When the protruding length of the pressing member changes, the adjusting mechanism is formed on the tip of the pressing member and the upper surface of the base. The distance between the crimp terminal and the pressed anvil changes, and the pressure for pressing the crimp terminal changes. The pressure at the time of the crushing operation is detected by a pressure sensor, and the pressure adjusting means controls the projecting length of the pressing member so that the detected pressure detected by the pressure sensor matches the optimum pressure set by the pressure setting means. Adjust

In a normal crushing operation, the crimping terminal is placed on an anvil formed on the upper surface of the base.
The power mechanism operates. Accordingly, the guide member moves downward, and the crimp terminal is crushed between the tip of the pressing member located at the lower end of the guide member and the anvil.

According to a third aspect of the present invention, there is provided a terminal crimping apparatus.
3. The terminal crimping device according to claim 1, wherein the adjustment mechanism includes a motor capable of numerically controlling a rotation direction and a rotation angle of a drive shaft, and changing the rotation angle of the motor to perform the pressing. This is to change the protruding length of the member.

Therefore, according to the terminal crimping device of the third aspect of the present invention, in addition to the operation of the terminal crimping device of the first or second aspect, when adjusting the height of the crimp terminal to the target height, Alternatively, when adjusting the crushing pressure to the optimum pressure, the protrusion length of the pressing member is changed by adjusting the rotation angle of the motor provided in the adjustment mechanism. Here, the motor may be a stepping motor, a servo motor having an encoder, an ultrasonic motor, or the like. By using such a motor, the rotation angle of the motor and the protrusion length of the pressing member can be related to each other. Therefore, by controlling the rotation direction and rotation angle of the drive shaft of the motor numerically, the protrusion of the pressing member The length can be changed freely.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A terminal crimping apparatus according to an embodiment of the present invention will be described below with reference to FIGS.
1 to 3 are perspective views showing a terminal crimping device according to an embodiment of the present invention, FIG. 4 is a block diagram showing control means in the terminal crimping device according to an embodiment of the present invention, and FIGS. FIG. 8 is a flowchart showing the operation of the control means of the terminal crimping device according to one embodiment of the present invention, and FIG. 8 is an explanatory diagram for explaining the correction amount determining means of the terminal crimping device according to one embodiment of the present invention.

The terminal crimping apparatus 1 of this embodiment includes a terminal crimping apparatus main body 2 for crushing a crimp terminal, and a terminal crimping apparatus main body 2.
And a display 4 for displaying the state of the terminal crimping device main body 2, particularly the output state of the pressure sensor. As shown in FIG. 1, the main body 2 of the terminal crimping device has, as main components, a column member 5 that is vertically erected, and is disposed above the column member 5, and moves up and down by the operation of the power mechanism 6. It has a guide member 7 and a base 8 located below the support member 5.

The support member 5 is formed of metal,
a, the column portion 5b, and the root portion 5c have a substantially U-shaped cross section. The support member 5 is installed so that the longitudinal direction of the pillar portion 5b is perpendicular to the ground, and a guide member 7 is attached to the side surface of the arm portion 5a in a state in which the guide member 7 can slide up and down. A base 8 is attached to the side surface of the root 5c and below the guide member 7.

As shown in FIG. 2, the guide member 7 is formed of metal, is supported on both sides in the width direction by a support member 9 fixed to the arm 5a of the support member 5, and is slidable only in the vertical direction. Has become. The guide member 7 moves up and down by the power mechanism 6.

The power mechanism 6 includes a motor 11 and a crankshaft 1.
By rotating the guide member 2, the guide member 7 is slid. At a substantially center of the guide member 7, an elongated guide hole 7a extending in the lateral width direction is formed.
A sliding member 13 made of a metal which has a vertical width substantially equal to that of the guide hole 7a is fitted into the guide hole 7a.
Numeral 3 can move in parallel in the guide hole 7a in the longitudinal direction. The sliding member 13 is rotatably supported at its center at an end of the crankshaft 12 connected to the drive shaft of the electric motor 11.

The crankshaft 12 has a main shaft 12a having one end connected to the drive shaft of the electric motor 11, an orthogonal shaft 12b having one end suspended from the other end of the main shaft 12a, and a perpendicular shaft 12b having the other end suspended from the other end of the orthogonal shaft 12b. It consists of a working shaft 12c substantially parallel to the main shaft 12a, and has a whole crank shape. Therefore, the spindle 1
When 2a rotates, the end of the working shaft 12c makes a circular motion, and the sliding member 13 supported by the end of the working shaft 12c makes a circular motion by the rotation of the drive shaft of the electric motor 11. Sliding member 13
Of the circular motion, the vertical direction component causes the guide member 7 to move up and down, and the horizontal component of the circular motion of the sliding member 13 causes the sliding member 13 itself to circularly move in the guide hole 7a in the longitudinal direction. An encoder 29 is attached to the rotating shaft of the electric motor 11, and the position of the guide member 7 is detected via the encoder 29.

As shown in FIG. 3, a pressing member 16 is attached to the guide member 7 via an adjusting mechanism 15 and a pressure sensor 19. The pressing member 16 is disposed so as to protrude from the lower end of the guide member 7, and the length of the downward protruding portion can be adjusted by the adjusting mechanism 15. Also,
The pressing member 16 is formed of metal, and the lower end is sharpened downward. The pressing member 16 moves up and down integrally with the guide member 7.

As shown in FIG. 1, the base 8 is attached to the side surface of the root portion 5c of the support member 5, and substantially the entire upper surface is a flat surface.
A concave anvil 8a is formed. Therefore, by placing the crimp terminal, which is a crimp terminal, on the anvil 8a of the base 8 and driving the electric motor 11, the pressing member 16
Moves downward together with the guide member 7, and the tip of the pressing member 16 and the anvil 8a formed on the base 8 mesh with each other to crush the crimp terminal.

As shown in FIG. 3, the adjusting mechanism 15 is for changing the length of the pressing member 16 projecting from the lower end of the guide member 7 as appropriate. The adjusting mechanism 15 includes a power unit 21, a connecting unit 22, and an operating shaft 23. The power unit 21 has a stepping motor (hereinafter, referred to as a motor) 21a, and has a rotation direction, a rotation angle,
In addition, the rotational speed can be freely numerically controlled within a predetermined range. The connecting portion 22 includes a cylindrical first gear 22a and a disc-shaped second gear 22b. The first gear 22a has one end connected to the drive shaft of the motor 21a and the other end connected to the mounting frame 24.
It is rotatably mounted on. The second gear 22b has a female screw formed on the inner periphery, and is rotatably mounted by a mounting member (not shown) so as to rotate in accordance with the rotation of the first gear 22a. The operating shaft 23 has a bolt shape with an external thread formed on the outer circumference, and is screwed into a female screw formed on the inner circumference of the second gear 22b. And the operating shaft 2
Reference numeral 3 is attached so that it can move up and down and cannot rotate. Therefore, when the motor 21a is driven to rotate the drive shaft of the motor 21a, the first gear 2
2a and the 2nd gear 22b rotate. At this time, the rotation of the second gear 22b exerts a force for rotating the operation shaft 23. However, since the operation shaft 23 is mounted in a non-rotatable state, the operation shaft 23 is driven by the relationship between the male screw and the female screw.
Moves upward or downward.

A pressing member 16 is connected to the lower end of the operating shaft 23 via a pressure sensor 19, and the pressing member 16 moves up and down in accordance with the rotation of the motor 21a. That is, when the motor 21a is rotated in a predetermined direction, the pressing member 16 moves downward, and the amount of movement is a distance corresponding to the rotation angle of the motor 21a. When the motor 21a is rotated in the opposite direction, the pressing member 16 moves upward,
The movement amount is a distance corresponding to the rotation angle of the motor 21a. In other words, by numerically controlling the rotation direction and the rotation angle of the motor 21a, the movement direction and the movement amount (projection length) of the pressing member 1 can be controlled.

The distance between the distal end of the pressing member 16 and the anvil 8a formed on the upper surface of the base 8 is adjusted by the adjusting mechanism 15 having such a configuration. The adjusting mechanism 15 is controlled by the height adjusting control means 30 of the control means 3 so that the pressing member 16 is adjusted so that the height of the crimp terminal becomes the target height.
The protrusion length is automatically adjusted. Also, the adjusting mechanism 15
Is also controlled by the pressure adjustment control means 31 so that the pressing member 16 can obtain an optimum pressure in the crushing operation.
The protrusion length is automatically adjusted. Note that these adjustment methods will be described later.

Between the adjusting mechanism 15 and the pressing member 16,
A pressure sensor 19 is provided to crush the crimp terminal between the pressing member 16 and the anvil 8a.
The pressure applied to 6 is detected. This pressure is substantially equal to the pressure received by the crimp terminal. The pressure sensor 19 is configured by a piezoelectric element or the like, and changes a resistance value according to the received pressure.

Here, a change in the pressing force detected by the pressure sensor 19 will be described. The waveform of the pressing force detected by the pressure sensor 19 has a mountain shape, is generated periodically in accordance with the vertical movement of the guide member 7, and the amplitude of each waveform is substantially constant. That is, when the tip of the pressing member 16 starts to contact the crimp terminal, pressure is applied to the pressure sensor 19 and the guide member 7 is pressed.
When is located at the bottom dead center of the vertical movement, the largest pressure is detected. Then, as the guide member 7 moves upward from the bottom dead center, the detected pressure decreases.

When the tip of the pressing member 16 is damaged, the pressing member 1
When the overall length of the pressing member 6 is short, the distance between the tip of the pressing member 16 and the anvil 8a when the guide member 7 reaches the bottom dead center is not sufficiently short, so that the crimp terminal cannot be sufficiently crushed. Therefore, the pressure detected by the pressure sensor 19 decreases. If the crimp terminal cannot be sufficiently crushed, not only is the bonding force between the crimp terminal crimped to the wire end and the wire insufficient, but also the contact resistance between the crimp terminal and the wire is below the reference value. do not become. The pressing member 1 is also used when inserting an electric wire from which a part of a conductive wire has been removed into a crimp terminal.
The pressure detected by the pressure sensor 19 becomes smaller, as in the case where the tip of No. 6 is missing. On the other hand, when a part of the covering material at the end of the electric wire is inserted into the crimp terminal in a state where it cannot be removed for some reason and remains, the maximum value of the pressure detected by the pressure sensor 19 becomes large. Become.

Therefore, in the terminal crimping apparatus 1 of the present embodiment, a range which is an allowable standard of the bonding strength between the wire and the crimp terminal and the contact resistance is determined in advance, and the change of the pressing force detected by the pressure sensor 19 is analyzed. It is determined whether the bonding strength and the contact resistance between the wire and the crimp terminal are within an allowable range based on the crimped state of the crimp terminal to the wire end. Then, when the analysis result of the pressing force detected by the pressure sensor 19 indicates the pressure bonding failure, that is, when the detected pressure deviates from the allowable range, it is excluded as a defective product.

FIG. 4 is a block diagram showing the structure of the control means 3. The control means 3 includes a height adjustment control means 30;
It has a pressure adjustment control unit 31 and an abnormality detection unit 32.
The height adjustment control unit 30 includes a calculation unit 30a that determines the amount of protrusion correction of the pressing member 16, and a storage unit 30b in which housing bending information is stored in advance. Here, the operation unit 30a
Corresponds to the correction amount determining means of the present invention,
Corresponds to the storage means of the present invention. The arithmetic unit 30a includes a central information processing device (CPU) that performs arithmetic and control, and an auxiliary storage device including a read-only memory (ROM) and a random access memory (RAM).
The crimp terminal height (crimp height) is adjusted according to the program shown in (1). A height setting section 34 (corresponding to the height setting means of the present invention) and a height adjustment instruction switch 35 are connected to the input port of the height adjustment means 30, and the output port of the height adjustment means 30 is connected to an adjustment mechanism control. The unit 36 is connected. When adjusting the height of the crimp terminal, the height setting unit 34 numerically sets the amount of change in the height of the crimp terminal, that is, the difference between the target height of the crimp terminal and the current height. In practice, the type of the crimp terminal and the corresponding target height are prepared as a table, and when the crimp terminal to be crushed is determined, the target height is uniquely determined according to the table. From the height, the current height measured with a measuring instrument such as a caliper is subtracted to determine the amount of change. The height adjustment instruction switch 35 is for instructing the start of automatic adjustment of the height of the crimp terminal, and when pressed by an operator, an adjustment start instruction signal is sent to the height adjustment control means 30. .

The adjusting mechanism control unit 36 controls the motor 21 of the adjusting mechanism 15 based on the output of the calculating unit 30a of the height adjusting control unit 30 or the output of the pressure adjusting control unit 31.
The rotation angle, rotation direction, and rotation speed of a are controlled. In other words, the protrusion length of the pressing member 16 can be freely changed by numerically controlling the rotation direction and the rotation angle of the motor 21a.

The pressure adjustment control means 31 includes a central information processing device (CPU) for performing calculations and controls, and an auxiliary storage device including a read-only memory (ROM) and a random access memory (RAM). The crushing pressure is adjusted according to the program shown in FIG. A pressure setting unit 37, a pressure adjustment instruction switch 38, a position detection unit 39, and a pressure recognition unit 40 are connected to the input port of the pressure adjustment control unit 31, and the output port of the pressure adjustment control unit 31 is The mechanism control unit 36 and the power mechanism control unit 4
1 are connected. Further, the pressure adjustment control means 31
Has a pressure recognizing means 31a, learns a correlation (pressure change information) between a change in the protruding length of the pressing member 16 and a pressure change detected by the pressure sensor 19, and calculates an arithmetic unit of the height adjustment control means 30. The pressure change information is transmitted to 30a.

The pressure setting section 37 (corresponding to the pressure setting means of the present invention) sets an optimum pressure for performing the crushing operation by numerical values. This optimum pressure is a value displayed on the display 4 when the height adjustment control means 30 is operated. That is, once the height of the crimp terminal is adjusted by the height adjustment control means 30 and the optimum pressure corresponding to the height is recognized once, when the same type of crimp terminal is crushed thereafter, the recognized optimum pressure is determined. Is input to the pressure setting unit 37. The pressure adjustment instruction switch 38 is for instructing the start of automatic pressure adjustment, and when pressed by an operator, an adjustment start instruction signal is sent to the pressure adjustment control means 31. In addition, the position detection unit 39 includes the power mechanism 6
The position of the guide member 7 is recognized on the basis of the output of the encoder 29 provided in the controller. Further, the pressure recognition unit 40 recognizes the crush pressure based on the resistance value of the pressure sensor 19.

The abnormality detecting section 32 includes an allowable range setting section 32a for setting a threshold value which is an allowable reference for the connection strength and contact resistance between the electric wire and the crimp terminal, and a peak value (maximum value) of the output of the pressure recognition section 40. ) Is compared with a reference value set by the allowable range setting unit 32a.
When the output of 0 deviates from the allowable range, a stop signal is sent to the power mechanism control unit 41.

The power mechanism control section 41 controls the rotation angle, rotation direction, and rotation speed of the electric motor 11 of the power mechanism 6 based on the output of the pressure adjustment control means 31. That is, since the power mechanism 6 is provided with the encoder 29 that outputs an output in accordance with the rotation angle of the electric motor 11, the electric motor 11 is controlled based on the output of the encoder 29 recognized through the position detection unit 39. By controlling, the electric motor 11 can be rotated in an arbitrary direction by an arbitrary angle. Further, the output of the comparison unit 44 of the abnormality detection unit 32 is input to the power mechanism control unit 41. If a stop signal is sent from the abnormality detection unit 32 during the normal crush operation, the motor 11 Is stopped, and the crushing operation is stopped.

The control means 3 has a display control section 44. The display control unit 44 causes the display 4 to display a time-based change in the pressure recognized by the pressure recognition unit 31 in a graph, and causes the display 4 to display the pressure (maximum detected pressure) during the crush operation numerically.

Next, the operation for adjusting the height of the crimp terminal in the height adjustment control means 30 of the terminal crimping apparatus 1 of the present embodiment will be described with reference to the flowchart shown in FIG. 5 and the explanatory diagram shown in FIG. This adjustment operation is performed only when the crimping operation of each type of crimp terminal is performed for the first time after the terminal crimping device 1 is newly introduced. In other words, this adjustment need only be performed once for the same type of crimp terminal. In other words, in managing the crimping state of the crimping terminal, since the height of the crimping terminal is conventionally managed, the optimum height of the crimping terminal has been recognized, but the optimum pressure at the time of the crushing operation has been recognized. Since there is no data, it is not possible to directly input the optimum pressure corresponding to the crimp terminal. In view of this, the terminal crimping device 1 of the present embodiment includes the height adjustment control means 30 to recognize the optimum pressure from the optimum height of the crimp terminal.

Since the height adjustment control means 30 calculates the correction amount using the information (pressure change information) detected by the pressure adjustment control means 31, before the height adjustment control means 30 is operated, the crimp terminals are removed. It is set on the anvil 8a of the base 8, the pressure adjustment control means 31 is operated, and the crushing operation is performed once with an appropriate pressure. Although the operation of the pressure adjustment control means 31 will be described later, this operation generates pressure change information. The pressure change information is a correlation between a change in the protrusion length of the pressing member 16 and a change in pressure detected by the pressure sensor 19. Here, the pressure set when operating the pressure adjustment control means 31 may be a constant value,
It may be a value estimated from the worker's past experience. Then, the height of the crimp terminal generated by the crushing operation is measured with a measuring instrument such as a caliper.

As shown in the flowchart of FIG. 5, the height adjustment control means 30 inputs the difference between the measured height of the crimp terminal and the target height, that is, the amount of change by the height setting section 34 (YES in step T1), When height adjustment is instructed by pressing the height adjustment instruction switch 35 (YES in step T2), the height adjustment control means 30 is operated to calculate the correction amount of the pressing member 16 (step T3).

More specifically, the calculation unit 30a of the height adjustment control unit 30 includes the housing deflection information stored in the storage unit 30b, the pressure change information transmitted from the pressure recognition unit 31a of the pressure adjustment control unit 31, and Based on the change amount set by the height setting unit 34, the correction amount of the protruding length of the pressing member 16 is determined. Here, the housing deflection information stored in the storage unit 30b is defined as the pressing force when the anvil 8b is pressed in a state where the crimp terminal is not placed on the anvil 8a and the extension amount of the support member 5 with respect to the anvil 8a. There is a correlation, for example, a correlation as shown in FIG. FIG.
In the graph, the horizontal axis represents the amount of elongation (distance), and the vertical axis represents the pressing force (pressure). This correlation is stored in the storage unit 30b in advance when the terminal crimping device 1 is manufactured. The pressure change information is a correlation between the change in the protrusion length of the pressing member 16 and the pressure change detected by the pressure sensor 19, as shown in FIG. Member 1
6 is obtained by elongating the protruding length by a certain length and detecting a change in pressure caused by the elongation.
In FIG. 8, the horizontal axis represents the amount of change (distance) in the protruding length of the pressing member 16, and the vertical axis represents the pressure.

Then, the amount of elongation of the support member 5 with respect to the pressing force can be determined from the housing bending information, and the change in pressure with respect to the change in the projection length of the pressing member 16 can be determined from the pressure change information. As a reference, the amount of change in the height of the crimp terminal itself with respect to pressure is determined by subtracting the amount of extension of the support member 5 (graph A) from the change in the protrusion length of the pressing member 16 (graph A) (c). Graph). Therefore, the pressure with respect to the change amount set by the height setting unit 34 is obtained from the graph of C. For example, if the change amount set by the height setting unit 34 is a3 (μm), the pressure is A (Kg). Then, the amount of change in the protruding length of the pressing member 16 with respect to this pressure is determined based on the graph (a). That is, when the pressure is A (Kg), the amount of change in the protruding length of the pressing member 16 is a2 (μm).
This change amount is a correction amount of the protruding length of the pressing member 16.
In the terminal crimping apparatus 1 of the present embodiment, the correction amount is determined from a graph for convenience of description, but the correction amount may be calculated based on a predetermined mathematical formula.

The height adjustment control means 30 transmits the correction amount thus determined to the adjustment mechanism control unit 36, and the adjustment mechanism control unit 36 changes the protrusion length of the pressing member 16 by the transmitted correction amount. The motor 21a is operated as described above (step T4). As described above, if the protrusion length of the pressing member 16 is adjusted, and then the crimping terminal is crushed (step T5), the height of the crimp terminal becomes
4 and changes by the change amount set, and coincides with the target height. Then, at this time, the display control unit 44 displays the maximum pressure (crush pressure) detected by the pressure sensor on the display 4 (step T6). The displayed crushing pressure is the optimum pressure for the crimp terminal. When the crimp terminal is subsequently crushed, the optimum pressure is input and the operation for adjusting the crush pressure described below is performed.

Next, the operation of adjusting the crushing pressure in the pressure adjustment control means 31 of the terminal crimping apparatus 1 of the present embodiment will be described with reference to the flowcharts shown in FIGS. With the crimp terminal set on the anvil 8a of the base 8, an optimal pressure corresponding to the crimp terminal is input by the pressure setting unit 37 (YES in step S1). When the start of the adjustment operation is instructed (YES in step S2),
First, the electric motor 11 is driven by the power mechanism control unit 41,
The guide member 7 is moved downward (step S3). The rotation speed of the electric motor 11 at this time is set to be sufficiently lower than the rotation speed at the time of a normal crushing operation. For this reason, when the tip of the pressing member 16 contacts the crimp terminal, the motor 1
1 can be stopped. The rotation angle of the electric motor 11 and the output of the pressure sensor 19 are always detected by the position detection unit 39 and the pressure recognition unit 40, respectively.

As a result of rotating the motor 11 and moving the guide member 7 downward, when the tip of the pressing member 16 disposed at the lower end of the guide member 7 comes into contact with the crimp terminal, that is, when the pressure sensor 19 When the detected pressure exceeds the predetermined value (YES in step S4), the motor 11 is stopped (step S5). Subsequently, a distance L between the stop position of the guide member 7 and the bottom dead center of the guide member 7 is calculated based on the output of the position detection unit 39 (step S6). Then, the motor 21a is driven by the adjustment mechanism control unit 36,
The projecting length of the pressing member 16 projecting from the guide member 7 is
It is shortened by the distance L calculated in step S6 (step S7).

Subsequently, the electric motor 11 is driven by the power mechanism controller 41 to move the guide member 7 to the bottom dead center (step S8). At this time, the tip of the pressing member 16 comes into contact with the crimp terminal, and the output of the pressure sensor 19 has a value corresponding to the pressing force for pressing the crimp terminal. Therefore, the pressure recognition unit 4
The detected pressure recognized as 0 is stored as a reference pressure (step S9), and the process proceeds to step S16.

On the other hand, in step S4, the pressing member 1
If the guide member 7 has reached the bottom dead center before the tip of the terminal 6 contacts the crimp terminal (YE in step S10).
S), the electric motor 11 is temporarily stopped (step S11).
Subsequently, the motor 21a is driven by the adjustment mechanism control unit 36 to increase the length of the pressing member 16 protruding from the guide member 7 (step S12). Then, the pressing member 16
When the tip of the motor contacts the crimp terminal, that is, when the pressure detected by the pressure sensor 19 exceeds a predetermined value (YES in step S13), the rotation of the motor 21a is stopped (step S14), and the pressure is recognized. The detected pressure recognized by the unit 40 is stored as a reference pressure (step S1).
5) Go to step S16.

In step S16, the power mechanism controller 41
Drives the electric motor 11 to raise the guide member 7 by a predetermined amount (for example, 1 mm). The motor 21a adjusts the projecting length of the pressing member 16 protruding from the lower end of the guide member 7. Since the motor 21a cannot apply a large pressure to the crimp terminal, in other words, the pressing member 1
In the state where the tip of the pressing member 16 is in contact with the crimp terminal, the protruding length of the pressing member 16 cannot be increased, so that step S1 is performed.
In 6, the guide member 7 is raised by 1 mm so that the protruding length of the pressing member 16 can be lengthened.
Then, after raising the guide member 7 by 1 mm, the motor 21a is driven by the adjustment mechanism control unit 36, and the guide member 7
The protruding length of the pressing member 16 protruding from is increased by 50 μm (step S17).

Subsequently, the electric motor 11 is driven by the power mechanism control section 41, and the guide member 7 is moved so that the guide member 7 passes through the bottom dead center (step S18). At this time, the maximum value of the pressure detected by the pressure sensor 19, that is, the detected pressure when the guide member 7 is located at the bottom dead center is recognized (step S19). This detected pressure is determined in step S
9 or higher than the reference pressure stored in step S15, and the difference from the reference pressure is a magnitude generated by increasing the protruding length of the pressing member 16 by 50 μm. Then, a pressure difference between the detected pressure (maximum value) and the reference pressure is obtained (step S20), and based on this pressure difference,
The degree of pressure increase with respect to the change in the protrusion length of the pressing member 16 is recognized. The pressure difference is recognized by the pressure recognition means 31a and transmitted to the height adjustment control means 30 as pressure change information. Then, the amount of correction of the protrusion length of the pressing member 16 (the amount of correction of the rotation angle of the motor 21a) required to increase the detected pressure detected this time to the preset optimal pressure is estimated (step S21). When performing the crushing operation, the support member 5 supporting the guide member 7 is required.
Since the degree of deflection differs depending on the pressure and the like, when estimating the projection correction amount of the pressing member 16, it is estimated in consideration of the degree of deflection of the column member 5, similarly to the height adjustment control unit 30. In addition, if the amount of correction of the protrusion of the pressing member 16 can be estimated very accurately, the detected pressure can be made to match the optimum pressure by one correction. If the correction is performed based on the amount, the detected pressure may exceed the optimum pressure. When the pressure exceeds the optimum pressure, the crimp terminal is too crushed and cannot be restored. Therefore, in the terminal crimping device 1 of the present embodiment, the correction amount is estimated to be slightly lower than the actual value.

Then, the motor 21 a is driven by the adjustment mechanism control unit 36, and the pressing member 1 protruding from the guide member 7.
The protrusion length of No. 6 is increased by the protrusion correction amount estimated in step S21 (step S22). Thereafter, the electric motor 11 is driven again by the power mechanism control unit 41, the guide member 7 is moved so as to pass through the bottom dead center (step S23), and the maximum value of the pressure detected by the pressure sensor 19 is recognized (step S23). Step S24).

As a result of correcting the protruding length of the pressing member 16,
When the maximum value of the pressure detected by the pressure sensor 19 substantially matches the optimum pressure set by the pressure setting unit 37 (YES in step S24), the automatic adjustment of the crush pressure is terminated. Then, in estimating the protrusion correction amount in step S21, the value is estimated to be slightly lower than the actual value, so that the detected pressure does not match the optimum pressure in one correction. Therefore, in step S25, the control in steps S21 to S24 is repeated until the detected pressure substantially matches the optimum pressure. That is, in step S21, the protrusion correction amount and the degree of pressure increase generated when the protrusion length of the pressing member 16 is increased by the protrusion correction amount are recognized, and the detected pressure detected this time is set to a preset optimum pressure. The amount of correction of the protruding length of the pressing member 16 necessary for raising the height is estimated. Then, step S23 and step S2
4 is performed in the same manner. Thus, by repeating the control of steps S21 to S24 a plurality of times,
The detected pressure gradually approaches the optimum pressure, and finally reaches a pressure very close to the optimum pressure.

As described above, in the terminal crimping apparatus 1 described above,
The height setting unit 34 inputs the amount of change in height, which is the difference between the target height of the crimp terminal and the current height (actual height), and operates the height adjustment control means 30 with the height adjustment instruction switch 35. The motor 21a is controlled via the adjustment mechanism controller 36 so that the height of the crimp terminal changes only by the change amount by simply instructing the motor 21a to change. Therefore,
The change of the height of the crimp terminal can be automatically adjusted. Therefore, the operation of adjusting the height of the crimp terminal can be performed extremely easily and quickly.

In particular, in the terminal crimping apparatus 1 described above, when adjusting the height of the crimp terminal, when correcting the protrusion length of the pressing member 16 protruding from the lower end of the guide member 7, the housing deflection information stored in advance is used. Since the correction amount is calculated based on the pressure change information obtained by learning, the height of the crimp terminal can be accurately changed by the set change amount. Therefore, the height of the crimp terminal can be reliably matched with the target height.

In the terminal crimping apparatus 1 described above, the crushing pressure when the height of the crimp terminal matches the target height is displayed on the display unit 4.
The optimum pressure during the crushing operation can be easily recognized. Therefore, in managing the crimped state of the crimp terminal, it is possible to easily shift from management based on the height of the crimp terminal to management based on the crush pressure.

Further, in the terminal crimping apparatus 1 described above, the optimum pressure value corresponding to the crimp terminal is input by the pressure setting unit 37, and the pressure adjustment instruction switch 38 instructs the pressure adjustment control means 31 to operate. The motor 21a is controlled via the adjustment mechanism control unit 36 so that the detected pressure recognized by the pressure recognition unit 40 matches the optimum pressure. Therefore, the projecting length of the pressing member 16 projecting from the lower end of the guide member 7 can be automatically adjusted to a length at which the optimum pressure is obtained during the crushing operation. Therefore, the operation of adjusting the crushing pressure can be performed easily and promptly. Further, by adjusting the crushing pressure, the crimping state of the crimping terminal can be managed with high accuracy.

Further, in the terminal crimping apparatus 1 described above, since the stepping motor is used as the motor, the protrusion length of the pressing member 16 can be freely changed by controlling the rotation direction and the rotation angle of the drive shaft of the motor. can do.

Incidentally, the terminal crimping apparatus 1 of the above embodiment
In the above, a stepping motor is shown as the motor of the adjusting mechanism 15, but a servo motor having an encoder, an ultrasonic motor, or the like may be used.

Although the terminal crimping apparatus 1 of the above embodiment has the pressure adjustment control means 31 and has the function of automatically adjusting the crush pressure so as to obtain the optimum pressure, it does not have the pressure adjustment function. The present invention can also be applied to such a device. That is, even in a terminal crimping device that manages the height of the crimp terminal, the height of the crimp terminal can be automatically adjusted, so that the adjustment time is greatly reduced.

The pressure adjustment control means 31 of the terminal crimping apparatus 1 of the above embodiment corrects the protrusion of the pressing member 16 from the change of the detected pressure with respect to the change of the rotation angle of the motor 21a (change of the protrusion length of the pressing member 16). Although an example of estimating the amount is shown, the protruding length of the pressing member 16 may be corrected by a predetermined constant length so as to gradually approach the optimum pressure.

[0066]

As described above, in the terminal crimping apparatus according to the first aspect of the present invention, the adjusting mechanism is controlled so that the height of the crimp terminal changes by the change amount set by the height setting means. The change of the height of the crimp terminal can be automatically adjusted. Therefore, the operation of adjusting the height of the crimp terminal can be performed extremely easily and quickly. Particularly, in adjusting the height of the crimp terminal, when correcting the protrusion length of the pressing member protruding from the lower end of the guide member, based on the housing deflection information stored in advance and the pressure change information obtained by learning. Therefore, the height of the crimp terminal can be accurately changed by the set change amount. Therefore, the height of the crimp terminal can be reliably matched with the target height.

In the terminal crimping apparatus according to the second aspect of the present invention, in addition to the effect of the terminal crimping apparatus according to the first aspect of the present invention, the optimum pressure during the crushing operation can be easily recognized by the display means. Therefore, in managing the crimped state of the crimp terminal, it is possible to easily shift from management based on the height of the crimp terminal to management based on the crush pressure. Further, in the management based on the crushing pressure, since the protrusion length of the pressing member protruding from the lower end of the guide member is automatically adjusted to a length at which the optimum pressure is obtained during the crushing operation, it is easy to adjust the crushing pressure. And quickly.

According to a third aspect of the present invention, in addition to the effects of the first and second aspects of the present invention, the terminal crimping device controls the rotation angle of the motor of the adjusting mechanism, thereby providing a lower end of the guide member. The projecting length of the pressing member projecting from the contact member can be freely adjusted.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an entire terminal crimping apparatus according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the vicinity of a guide member of the terminal crimping device according to one embodiment of the present invention.

FIG. 3 is a perspective view showing an upper part of a pressing member of the terminal crimping device according to one embodiment of the present invention.

FIG. 4 is a block diagram showing control means in the terminal crimping device according to one embodiment of the present invention.

FIG. 5 is a flowchart showing the operation of the height adjustment control means of the terminal crimping device according to one embodiment of the present invention.

FIG. 6 is a flowchart showing the operation of the pressure adjustment control means of the terminal crimping device according to one embodiment of the present invention.

FIG. 7 is a flowchart showing the operation of the pressure adjustment control means of the terminal crimping device according to one embodiment of the present invention.

FIG. 8 is an explanatory diagram for explaining the operation of the height adjustment control means of the terminal crimping device according to one embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 terminal crimping device 5 support member 6 power mechanism 7 guide member 8 base 8C anvil 11 electric motor 15 adjustment mechanism 16 pressing member 19 pressure sensor 21a motor 29 encoder 30 height adjustment control means 30a operation unit (correction amount determination means) 30b storage unit (Storage Means) 31 Pressure Adjustment Control Means 31a Pressure Recognition Means 34 Height Setting Unit (Height Setting Means) 35 Height Adjustment Instructing Switch 36 Adjustment Mechanism Control Unit 37 Pressure Setting Unit (Pressure Setting Means) 39 Position Detector 40 Pressure Recognition Unit 41 Power mechanism control unit

Claims (3)

[Claims] 1. A base having an anvil formed on an upper surface thereof, a support member vertically erected on the base, and disposed on an upper portion of the support member to move up and down with respect to the base. A guide member supported so as to move the guide member up and down; and a power mechanism positioned at a lower end of the guide member and a crimp terminal mounted on the anvil of the base. A pressing member that performs a crushing operation between the pressing member, an adjusting mechanism that adjusts a protruding length of the pressing member that protrudes downward from a lower end of the guide member, and a change amount between a target height and an actual height of the crimp terminal. Height setting means to be set as: a pressure sensor for detecting pressure in the crushing operation; and a pressing force when the anvil is pressed in a state where the crimp terminal is not placed on the anvil, and the support portion for the anvil. Storage means for storing in advance the correlation with the amount of elongation of the housing as housing flexure information; and operating the adjusting mechanism with the crimp terminal mounted on the anvil to change the protruding length of the pressing member and the pressure. Pressure recognition means for recognizing a correlation with a pressure change detected by a sensor as pressure change information; housing deflection information stored in the storage means; pressure change information recognized by the pressure recognition means; A correction amount determining unit that determines a correction amount of the protrusion length of the pressing member based on the change amount set by the setting unit; and the adjusting mechanism based on the correction amount determined by the correction amount determining unit. A terminal crimping device, comprising: a height adjustment control unit that operates to adjust a protrusion length of the pressing member. 2. A display means for displaying a pressure detected by the pressure sensor; a pressure setting means for setting an optimum pressure when the crimping terminal is crushed by the pressing member; and a pressure detected by the pressure sensor. And a pressure adjusting control means for operating the adjusting mechanism to adjust the protrusion length of the pressing member so as to match the optimum pressure set by the pressure setting means. The terminal crimping device according to the above. 3. The adjusting mechanism includes a motor capable of numerically controlling a rotation direction and a rotation angle of a drive shaft, and changing a rotation angle of the motor to change a protrusion length of the pressing member. The terminal crimping device according to claim 1.