JPS5884687A - Welding method for laminated plate - Google Patents

Abstract

PURPOSE:To increase efficiency and reliability of welding by resistance spot welding a laminated plates made by sandwiching a synthetic resin layer between metallic surface materials, pressing the plates by welding electrodes having spherical end faces and maintaining the energized state. CONSTITUTION:Laminated plates 1 made by sandwiching a synthetic resin layer 3 between thin metallic surface materials 2 is superposed, and pressed by welding electrodes 4 having spherical end faces 4 from both sides to fit them to the place to be welded. Then, the plates 1 is further pressed, and the surface materials 2 are squashed to spherical form and the resin layer 3 is forced out of periphery. Pressure is applied to the laminated plates whose surface materials 2 are brought into contact by the process, and current is applied to the electrodes, and the laminated plates are spot welded. After stopping current, welded part is solidified holding the plates to maintain the joining condition of the surface materials 2. Thus, efficiency and reliability of welding are increased.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of welding laminates in which laminates each having a synthetic resin layer formed on a thin or metal skin material 11j are brought into spot bath contact.

Since the electrical resistance of the synthetic resin layer is high in a laminated plate having a synthetic resin layer, it is difficult to directly apply a resistance spot welding method for welding ordinary metal plates.

Therefore, in the past, a circuit was installed near the place where the mutually stacked laminated plates should be in contact with each other, and the current was distributed between each skin material. Countermeasures such as resistance spot welding have been taken. but,
According to this method, the skin material is heated excessively along the NONOI gas circuit through which the synthetic resin NO is evaporated or burned, resulting in a functionally impaired area. There is a risk that the welded product may extrude.Another method is to create indentations or penetrations in advance at the location where the laminate is to be welded by a worker to ensure a path for the welding current. It is considered. However, in this case, a separate process for the pre-process and spot a contact is required, making the work 1 piece more expensive, and what's more, the pre-process requires an excessive 1W? ＋ ＋There is the inconvenience of having to drink water in the evening.

In addition, it is possible to perform resistance spot welding under heavy pressure in 2015, but in this JJA joint U, pressure and thermal strain caused by variations in deformation of the skin material under pressure 11 may be considered. Good welded product '5f, although the quality is affected by the roughness etc.
1. The present invention was developed in light of these circumstances, and the effect of heat or pressure applied to the laminate is minimal, and there is no damage to the synthetic resin layer or decrease in strength. The purpose of the present invention is to provide a bath handling method for high-density plates that can obtain fewer bath products, do not require a troublesome process, and can improve work efficiency. .

In order to achieve all of the above objects, the present invention-1: continuously resistance spot welding (3) with a welding electric current having a spherical end [C1] while changing the IJE force and energization state to the IJE side 1 (3). (1, Nimono ma:, stacking) Familiar pressure 1-culm, which blends the joints of the gastric plates with low pressure, and then applies additional pressure to remove the resin's layer from the ligation bath. 1 (After the resin extrusion L7 process is completed, the epidermis 4 and 1 are brought into spot bath contact under a pressure sufficient to maintain contact between the skins 4 and 1.) 1
0' direct heating process and this spot welding i/(-bath M
! The gist is a 7-person method that includes a honey welding process in which the metal is clamped under strong pressure under de-energized conditions and cooled.

Due to the fact that such a series of 'rfill fills are brought into contact with the spot bath V'c, there are adverse effects such as pressurization φ and thermal distortion, and while the work is extremely sloppy, the near '-1-determining work is also carried out. Required fz<, high T4r rate.

^ Satoru Yorime's welding becomes Tsukamori.

Hereinafter, one example of the present invention, M1. i $1J >, (py, 1
Then v, 1 (g light, 15c clear.

As shown in Fig. 1, the laminate l to be welded is a resin layer thicker than the skin material as a core I between the metal skin side 2 of the thin material 1. 3rFor example, a pair of laminated plates 1 are molded into a tight shape by phantom Sores molding, and then boiled.
(4) Pressure is applied from the sides of both rows by a pair of welding holes 2 and poles 4 at the locations where the stacked laminate plates 1 are to be welded. Each of the four welding chamber frames shall have a spherical end surface 5 with a predetermined curvature. 3. In this process, the mating surface IA of each laminate 1 eliminates the surface mismatch due to press molding strain %, and the table 1 m of 10,000 is warped; Pressure force can be applied at the size where the I-dyed fr shape is obtained.

In addition, Fig. 3 shows the welding line, the electrode pressure, and the nitridation that accompanies the time transition of the interelectrode resistance value.The skewer and flow for measuring the interelectrode resistance are This is a weak current that does not cause melting, evaporation, etc. In addition, as shown in Figure 3, the bath contact current is cut off during this familiarization pressurization-1 step.
In addition, the pressure force ij', i'+] +* is set to [J] as a value capable of deforming the surface of the layered plate 1.

The inter-electrode resistance is at its maximum value.

Next, in the resin extrusion process, as shown in FIG. By further applying pressure, the skin material 2 with a volume of Jt&1 is crushed into a spherical shape, and the synthetic tree finger layer 3 is exuded from the spherical center of the skin material 2 into the surrounding area. With this I4, as shown in FIG. 3, the welding current does not flow in the final stage, and the electrode force pressure is set to a value P2 higher than that in the previous break-in pressure step. The interelectrode resistance remains at its maximum value until the final stage. 1. In addition, at this final stage of drying and rooting, the skin material 2 of each laminate 1 comes into contact with each other at the position where the synthetic 4 resin layer 3 oozes out, so the resistance between 1 electrodes decreases, and along with this, Welding current begins to flow. Therefore, when the bath current flows, the movement of the welding electrode 4 is stopped and the constant circuit of the resistor 611I is disconnected.

In this step, if the radius of curvature of the tip 5 of the welding electrode 4 is 1, the thickness of the synthetic resin layer 3 of the laminate 1 is t, and the compressive strength of the synthetic resin layer 3 is σp, then the synthetic resin layer 3, which requires the exudation j ~ force πσpRt or more of 3,
-Also, cl for the transformation of Rokupakuji 2.

Letting the deformation point of the skin material 2 be σm, it is assumed to be the key to its shape.

Next, as shown in FIG.
is in contact with /CC, and while applying the minimum force (1 pressure) necessary to maintain contact with each layer of the laminate 1 and its skin, the laminate 1 is welded together by the bath contact current flowing between the IJf poles 4. Spot weld the 4 pieces in Figure 3.
In this second ■: a bath contact current of I'9 [>ig, flows,
The electrode pressurization force is set to P1, which is approximately equal to the pressure applied to the first Il and III stains.The circuit for measuring the resistance between the electrodes is cut off in the previous process. In addition, due to the softening of the surface applied force P + N1 and the surface layer 2, the board j da Seisho was
To a certain extent, the above-mentioned μm1<ga fi '71. i1i
This is the candy you need to keep up. Then, in this upper stage, the four skin materials 2 expand with the force 11 heat, /7'
When the required amount of metal is melted for welding, the energization is stopped.

However, from 1 to 2, as the final pressure welding process,
) (As shown in (1"), the skin material 2 of the volume laminate plate 1 is bath-melted by spot welding, and the bonding state between the skin materials 2 is maintained by the bath contact electrode 4 in which the current is not supplied. By clamping with pressure, the '#' + 1111-f9B component 6 is solidified (7). That is, as shown in Fig. 3, in about 1 e], the bath contact current is cut off. Then, the force 1lII-force applied to the valley welding electrode 4 is set to a value P3 higher than that during electric heating. I can avoid the city.

According to such a method, the spherical end surface 5 of R11 Myoichizan 4
Since the laminate 1 is sequentially pressurized at low temperature 1 in the 1i71 stain pressurization step and the resin extrusion step 2 V, the synthesis position I Seepage 1-7 of JiW layer 3 and gap in skin material 2,
Do contact work <■λ. And one company heating process '7''
Q""On the contrary, it is possible to suppress the occurrence of mechanical distortion because it is possible to perform spot bath contact without any extra force pressure.Furthermore, in the pressure welding process, cold confinement under pressure is re-pressed" Since the solidification of the welded part is accelerated by this, the adverse effects of heat can be prevented in this area as well, and a more effective solidifying effect of the welded part can be obtained.

In addition, in the previous step ``Implementation? 1'', while increasing the resistance between the electrodes, ``Case law 1 regarding pressurizing force and bath welding current'' was carried out. (8) In some cases, it is possible to light up the light with (8).

As described above, according to the present invention, the welding electrode having a spherical end surface applies the pressure force and the A voltage state of the laminated plate to 4 to 1lj1.
1 σ 1 shout - 1 consecutively! (Anti-sport 1-ff4
Since they are in contact with each other, the force is 11 pressures 100 or more, and while preventing the adverse effects of thermal distortion, it is exceptionally difficult to do.It also requires complicated positioning work. ik
Tll: rate, and the reliability is actually JJf, L, ,
j”) The objectives of the T period can be achieved.

4 11) Year d) of the drawing? , The clear diagram shows a one-fire embodiment of the present invention.
Figure 1 is an ili cross-sectional view showing the laminate, Section 2 1(d)
~(d) Q:1 Each upper step is sequentially shown in the 11th bright figure in the box 1', the second
Figures (b') to (d゛) are r,
, 61 nine-fold enlarged view, Fig. 3 shows 1 each E'', time f-yard indicating the use of 3゜1...l*J-board, 2...
・Clothing and peeling, 3. Synthesis 1se.

Agent Tatsuyuki Unuma (and 2 others) Figure 1 2ゝFigure 2 (a) (b) (.) (d) (b')
(.') (d')4
4 4th 3rd
Figure Compiled by the Director of the Patent Office 1 Table of the Cases 1986 Patent Application No. 186504 Sea Sub-2 Name of the Invention Method for Welding Laminate Plate 3 Person Making Amendment Relationship with Neutrality Patent Applicant Name (320)) Yota Jidosha Kogyo Co., Ltd. 4 Agent 6, Subject of amendment Column for detailed description of the invention in Book 1, Column for brief explanation of drawings, Drawing (Figure 2) 7. Contents of amendment (11 Specification No. 5 1-(b')j in the 16th line is expressed as "(θ
)”.

(2) Replace rlC')I on page 6, line 20 of the specification with "(
f) Change to j.

(3) Specification page 7, No. 17 Bamboo r (d,'),
1 to ``A (g)'' 1゜(4) The specification No. 9, lines 10 to 1511 are revised as follows.

lj "4. Simple explanatory diagrams of the drawings show one embodiment of the present invention, and FIG. 1 is a partial sectional view showing a laminate, and FIG. 2 (aL (b), ((ri,
l) is an explanatory diagram showing each process in sequence, and (e) and (f) of the same figure
, (g) are partially enlarged views corresponding to (b), (C), and (d) of the figure, respectively, and FIG. 6 is a time chart showing each action. (5) As shown in red on the attached drawing, Figure 2 (b'
) to (θ), the same figure (d') to (f), the same figure (d')
(g) respectively.

Below

Claims (1)

[Claims] (1) Laminated plates with a synthetic resin layer formed between thin metal red skin materials are glued together in 4, and the places where the stacked laminate plates are to be welded are cut into trenches with a shape that allows the mating surfaces to fit together. Pressure is applied from the inner and outer surfaces of a pair of baths #: with the spherical end surfaces of the electrodes! ,
I11 stain pressurization process and mutual combination are familiar/? ! r
The Maki layer board is as described in '1. A resin extrusion process in which the skin material of each laminate is crushed into a spherical shape by applying rough pressure with the spherical end surface of the pole, and the synthetic resin 1b\J- is exuded from the spherical center of the skin material to the surrounding area, and the synthetic resin Applying the minimum amount of pressure necessary to maintain the contact between the skins,
The electric power applied to the laminated plates by means of the electrodes causes the skin materials of each laminated sheet to be melted by the hot process and the spot bath welding to be brought into a state where the electricity is not applied, thereby causing the skin materials to stick to each other. Holding with high pressure while maintaining the state,
A method for welding a laminate, comprising a pressure welding step of solidifying a molten portion.