JPH06176845A - Welding device - Google Patents

Abstract

PURPOSE:To form a stable and high-quality welding condition which is bearable even to vibration of a vehicle by pressing both end parts of a connection member to a counter connection member, and radiating a laser beam directly from a laser beam radiation part through a through hole. CONSTITUTION:A ribbon 6 comprises a phosphor bronze plate is welded to a post 8 and a connector terminal 7, when air in a hollow part 26 is sucked from an air tube 24 to hold the ribbon 6 by a chuck surface 28 so as to apply end parts 6b, 6c to the post 8 and the terminal 7. Next, the end parts 6b, 6c are pressure welded with the post 8 and the terminal 7 by a coil spring 23. At this time, pressure from the chuck part 13 is directly applied to the end parts 6b, 6c through a pressure part 20 to keep between the end parts 6b, 6c and the post 8, the terminal 7 tight. Similarly, other cables are inserted into the groove 7 one by one. Laser beam is radiated from a laser beam radiation part 10 through a throughhole 11 directly to the end parts 6b, 6c, so the end parts 6b, 6c are welded with the post 8 and the terminal 7. Stable and high- quality welding which is bearable even to vibration of a vehicle can thus be achieved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding apparatus, and more specifically, it electrically connects a wiring board on which integrated circuit parts or the like are mounted to a connector terminal or a wiring board on which integrated circuit parts or the like are mounted. The present invention relates to a welding device for welding a connecting member used in some cases.

[0002]

2. Description of the Related Art FIG. 2 is a sectional view schematically showing a conventional welding apparatus. An electronic control unit that is mounted on a vehicle and controls ignition timing, fuel injection amount, and the like of an internal combustion engine includes a wiring board 3 and the like on which a large number of circuit elements such as a microcomputer and power elements are mounted. The wiring board 3 housed in the case 4 and a connector terminal 7 made of phosphor bronze, brass, or the like protruding outside the case 4 are connected to each other, and the wiring board 3 is a connector fitted to the connector terminal 7 (see FIG. It is electrically connected to a sensor (not shown), an actuator (not shown) or the like via a not shown) or the like. The wiring pattern 5 formed of copper or the like on the wiring board 3 is thin, and the post 8 as a reinforcing material plated with nickel such as aluminum is soldered onto the land portion 5a located at the end of the wiring pattern 5. The post 8 which is a contact on the wiring substrate 3 side and the connector terminal 7 are connected via the ribbon 6.

The ribbon 6 is formed by bending a band-shaped phosphor bronze plate having a thickness of 0.1 mm to 0.4 mm having elasticity to be curved in a substantially inverted U shape. 6
a, and an end portion 6b and an end portion 6c that extend horizontally from the lower portions of both ends of the central body portion 6a to the outside. The conventional welding device has a hollow portion 9a at the center and a central body portion 6a.
2 includes an insulating chuck portion 9 for air-chucking the ribbon 6, and a laser light irradiation portion 10 for sequentially irradiating laser light on the end portion 6b and the end portion 6c.

The ribbon 6 is attached to the land portion 5a or the post 8,
When welding to the connector terminal 7, while holding the ribbon 6 with the chuck portion 9 in a state where the end portion 6b is pressed against the post 8 and the end portion 6c is pressed against the connector terminal 7, the laser light irradiation portion 10 The end portion 6b is welded to the post 8 and the end portion 6c is welded to the connector terminal 7 by irradiating laser light.

[0005]

In the above-described welding apparatus, the chuck portion 9 has a thickness of 0.1 mm to 0.4 mm.
The central body portion 6a of the ribbon 6, which is a millimeter-shaped metal piece, is unstable because it is merely pressed at three points, and the pressing force applied to the end portions 6b and 6c through the chuck portion 9 becomes uneven. There was a risk that it would work. If the pressing force acts unevenly, the degree of adhesion between the end portion 6b and the post 8 or between the end portion 6c and the connector terminal 7 becomes insufficient, and the end portion 6b and the post 8 or between the end portion 6c and the connector terminal 7 become insufficient. There is a possibility that the welded state of is incomplete. Considering that the electronic control unit is mounted on a vehicle that is always subject to severe vibrations, the connection between the wiring board 3 and the connector terminal 7 in the electronic control unit is required to be perfect. Regardless, when the conventional welding device is used, there is a problem that the above-mentioned welding state cannot be perfect.

The present invention has been made in view of the above problems, and provides a welding apparatus capable of achieving stable and high welding quality which can sufficiently withstand vibration of a vehicle in connection between a wiring board and a connector terminal. The purpose is to do.

[0007]

In order to achieve the above object, a welding apparatus according to the present invention comprises a chuck portion for holding a main body portion of a connecting member and both ends of the connecting member to be welded to a member to be connected by laser light. In a welding device having a laser beam irradiation section, a pressing section that presses both ends of the connecting member toward the connected member is continuously provided to the chuck section, and a through hole that allows the laser beam to pass through the pressing section. It is characterized by being formed.

[0008]

According to the welding device of the present invention, when connecting the wiring board and the connector terminal, the chucking portion holds the connecting member while the pressing portion holds the both end portions of the connecting member. Press into contact with the connecting member. Then, the pressure from the chuck portion directly and evenly acts on the both end portions, and the both end portions are brought into close contact with each other without floating from the connected member. Further, with the both ends kept in close contact with the member to be connected in this way, the both ends of the connecting member may be directly irradiated with laser light from the laser light irradiation section through the through hole. Therefore, a stable and high quality welded state is formed between the both ends and the connected member.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a welding device according to the present invention will be described below with reference to the drawings. It should be noted that components having the same functions as those of the conventional example are designated by the same reference numerals.

FIG. 1 is a perspective view schematically showing a welding apparatus according to an embodiment, and 6 in the drawing shows a ribbon.

A wiring pattern 5 is formed on the wiring board 3 using copper, and a land portion 5 is formed at an end of the wiring pattern 5.
a is formed. A post 8 as a reinforcing member on the land portion 5a, which is nickel-plated with aluminum.
Are soldered, and the post 8 and the connector terminal 7 are connected via the ribbon 6.

The ribbon 6 is formed by bending a band-shaped phosphor bronze plate or the like having elasticity of 0.1 mm to 0.4 mm into a generally inverted U shape, and the ribbon 6 is formed in the central body portion. 6
a, and an end portion 6b and an end portion 6c that extend horizontally from the lower portions of both ends of the central body portion 6a to the outside.

The welding device is connected to the laser beam irradiating section 10, the insulating chuck section 13 and the chuck section 13, and is connected to the through hole 1.
1 is configured to include the pressing portion 20. The chuck portion 13 is the central body portion 6 a of the shaft body 27 and the ribbon 6.
Is provided with a chuck surface 28 that contacts with the shaft 2
A hollow portion 26 penetrating from 7 to the chuck surface 28 is formed, and the air tube 24 penetrating the central axis of the shaft body 27 is connected to the hollow portion 26 reaching the chuck surface 28.
A coil spring 23 is wound around the shaft body 27 to press the pressing portion 20 against the end portions 6b and 6c of the ribbon 6, respectively.

When the ribbon 6 is welded to the post 8 and the connector terminal 7, the ribbon 6 is held by the chuck surface 28 by sucking the air in the hollow portion 26 from the air tube 24, and the end portion 6b and the end portion 6b. Post 6 and connector terminal 7
Abut each. Next, the elasticity of the coil spring 23 is used to press the end portion 6b and the end portion 6c into pressure contact with the post 8 and the connector terminal 7, respectively. In this state, if the laser light irradiating section 10 directly irradiates the end portions 6b and 6c with the laser light through the through holes 11, the end portions 6b and 6c will reach the post 8 and the connector terminal 7. Each can be welded.

In the welding device according to the above-mentioned embodiment, the pressure from the chuck portion 13 directly and evenly acts on the end portions 6b and 6c via the pressing portion 20, and 6b and the post 8 and the end portion 6c and the connector terminal 7 can be kept in close contact with each other, and the end portion 6b and the end portion 6c can be welded without rising from the post 8 and the connector terminal 7, respectively.

As described above, by using the welding apparatus according to the embodiment, it is possible to form a stable and high quality welding state between the end portion 6b and the post 8 and between the end portion 6c and the connector terminal 7. .

In the above-described embodiment, the case where the connector terminal 7 and the post 8 are connected by using the welding device has been described, but the same applies when the post 8 and a post formed on another wiring board are connected. The welding device according to the embodiment can be used.

[0018]

As described above in detail, in the welding device according to the present invention, since the pressing portion is connected to the chuck portion, the wiring board and the connector terminal, or the wiring board connecting member is used. It is possible to firmly connect so as to sufficiently withstand the vibration of the vehicle.

[Brief description of drawings]

FIG. 1 is a perspective view schematically showing a welding device according to an embodiment of the present invention.

FIG. 2 is a sectional view schematically showing a conventional welding device.

[Explanation of symbols]

 6 Ribbon 6a Central body part 6b End part 6c End part 7 Connector terminal 8 Post 10 Laser light irradiation part 11 Through hole 13 Chuck part 20 Pressing part

Claims (1)

[Claims] 1. A welding device comprising: a chuck portion for holding a main body portion of a connecting member; and a laser light irradiation portion for welding both end portions of the connecting member to a member to be connected by laser light. The welding device is characterized in that a pressing portion that presses against the connected member is provided in series with the chuck portion, and a through hole that allows laser light to pass through is formed in the pressing portion.