JPS6284884A - Explosion pressure-contacting method - Google Patents

Abstract

PURPOSE:To improve, etc. the joining strength of a laminated material by providing a covered layer on the surface of the laminated material, also providing a metallic driving plate having a specified mass ratio through a gap, and subsequently, executing an explosion pressure welding. CONSTITUTION:A laminated material 2 is placed in parallel on a base material 1 by providing a pap 5 in advance. A metallic foil covered layer of about 10-100mum is formed by sticking a metallic foil of an Al foil to the upper surface of the laminated material 2 by an adhesive agent, and also, on its upper part, a metallic driving plate 4 whose mass ratio to the laminated material 2 is 0.5-5 times is provided. In such a case, a gap between the driving plate 4 and the laminated material 2 is set to a parallel gap of about 0.5-3 times of a plate thickness of the driving plate 4. Subsequently, the laminated material 2 is stuck to the base material 1 by exploding an explosive 7 through a dotonator 8. Since the driving plate 4 assists a deformation of the laminated material 2, the adhesive strength is improved, and also since a metallic foil 3 is used, the surface of the laminated material 2 can be protected.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention provides an improved method for manufacturing clad plates by explosive crimping, particularly for manufacturing clad plates made of a combination of materials that are difficult to join in explosive crimping. Regarding the method.

(Prior art) Explosive crimping is a method of joining opposing surfaces of dissimilar metal materials using explosives, and is used industrially as a method for manufacturing clad plates, double-walled pipes, etc. has been done. According to this method, it is possible to clad most combinations of practical metal materials. The characteristics of this explosive crimping method are particularly useful for joining material combinations that cannot be joined or cannot be joined with good performance by fusion welding, such as titanium and copper, aluminum and steel, and aluminum and copper. .

As such an explosive crimping method, for example,
Publication No. 545, Japanese Patent Publication No. 60-5392, Japanese Patent Publication No. 5392
No. 6-66391 and Japanese Unexamined Patent Publication No. 59-47078 disclose that a clad plate is manufactured by explosively crimping a base material and a laminate using a medium bonding material.

(Problems to be Solved by the Invention) However, the clad plate manufactured by the above method essentially consists of a laminate material (upper layer), a welding material (intermediate layer), and a base material (
The strength of the clad plate consisting of the lower layer (lower layer) depends more on the strength of the intermediary material, which is the intermediate layer, than the laminate material, which reduces the original strength of the laminate material, and also increases the thickness and weight of the cladding material. In addition to the increase, there will also be an increase in cutting and welding man-hours.

(Means for Solving the Problems) The present inventors have conducted various studies on explosive crimping methods for material combinations that do not provide good bonding between the laminate and the base material under the above-mentioned circumstances. A coating layer is provided on the upper surface of the laminate, and a drive plate made of a metal layer is superimposed on the laminate so that the driving plate is substantially parallel to the laminate, or its detonation side is in contact with the laminate, and there is a gap at the other end. Thereafter, the inventors discovered that by placing an explosive on the driving plate and then detonating the explosive 1, a clad plate could be obtained without using a bonding material, and the present invention was completed.

That is, the present invention provides an explosive crimping method in which laminates are stacked on top of a base material with a gap therebetween, and an explosive layer on the laminate is detonated to compress the laminate to the base material. A metal plate is provided with a coating layer on the laminate, and the mass per unit area of the laminate is 5% to 5%.The metal plate is used as a driving plate and is superimposed on the laminate with a gap almost parallel to the laminate, or the detonation side is the laminate. This is an explosive crimping method in which the base material and the laminate are bonded by stacking them so that they are in contact with each other and have a gap at the other end, and then an explosive layer is provided on the drive plate, and the explosive layer is detonated to join the base material and the laminate material. .

The explosive used in the present invention includes PE as the main safety agent.
It contains TN or TNT, perlite and some wood flour, and has an explosion velocity of about 2000 to 3000 M/3.

As the laminate used in the present invention, in the conventional explosive crimping method, it is difficult to bond to the base material alone, or the bonding force after explosive crimping is weak, so a medium bonding material that has good bonding properties with the base material is used. Hard titanium (JIS H4600, TP35
．． It can be applied to TP49), zirconium, alloys thereof, aluminum alloys, etc.

The base material used in the present invention is not particularly limited, and steel, alloy steel, non-ferrous metals, etc. can be used.

Suitable materials for the drive plate used in the present invention are aluminum plates, copper plates, and mild steel plates, which are said to have a large deformability during the explosive crimping process. The thickness of the driving plate relative to the thickness of the laminated material varies depending on the combination of materials, but if you organize this in terms of mass ratio (mass per unit area of the driving plate ÷ mass per unit area of the laminated material), it is 5 times the thickness of the driving plate. , preferably 1 to 2 times, to obtain a good bond. If the mass ratio is smaller than y6, even if the drive plate collides with the laminate, it will not be able to impart sufficient kinetic energy to the laminate, and it will not be possible to obtain a good bond with the base material. Ru. On the other hand, if the mass ratio exceeds 5 times, not only will it be necessary to use a large amount of wound agent to give sufficient deformation to the drive plate, but also the post-operative work on the drive plate will become difficult, and furthermore, the drive plate may become damaged. This is not preferable because it makes it difficult to maintain the gap between the base material and the laminate due to the increased weight of the explosive.

As shown in FIG. 1, the method of the present invention involves placing a laminate 2 on a base material 1 in parallel with a gap 5, which is adopted in the usual explosive crimping method, and then placing the laminate 2 on the base material 1. The drive plate 4 is placed with a parallel gap of 34 to 3 times the thickness of the drive plate,
Explosives 7 are then placed on the drive plate 4 to a uniform thickness. After that, the explosive 7 is detonated by the electric detonator 8, and the composite material 2 is
f Adhere to the base material. At this time, if the gap between the drive plate 4 and the laminate material 2 is smaller than % of the plate thickness of the drive plate, the air interposed between the drive plate and the laminate material will not be absorbed when the underlying base material and the laminate material are joined. If a crimped portion is formed and the gap is larger than 3 times, the laminated material will undergo significant work hardening, resulting in deterioration of physical properties and damage to the surface of the laminated material, which is not preferable.

Further, as shown in FIG. 2, the gap between the mating material 2 and the drive plate 4 may be a gently sloped gap. A good bond can be obtained by setting the gap between the laminate and the driving plate to be % to 3 times the thickness of the plate at the tip in the direction of progress of the explosive crimping. Furthermore, as shown in FIGS. 1 and 2, a metal foil may be stretched onto the laminated material 2 using an adhesive (for example, a liquid such as vinyl acetate emulsion or a transition tape). Although the material of the metal foil used does not need to be specified, aluminum foil is preferred because of its ease of availability, and a thickness of 10 to 100 μm is used. If the thickness of the metal foil is too thin, wrinkles or voids may occur in the foil. In addition, if it is too thick, a step may occur at the seam and adhesion may be impaired.

(Effect The effect of the drive plate in the method of the present invention will be described.

In the explosive crimping method, when the laminate collides with the base material,
There is an important relationship between the advancing speed of explosive crimping (moving speed of the impact point) and the impact angle, and an appropriate impact angle is required for the moving speed of the impact point. However, the hard titanium, zirconium, and aluminum alloys that are the objects of the present invention have low deformability during explosive crimping, so the usual explosive crimping method cannot obtain the desired impact angle and the expected bonding performance.

According to the method described in the present invention, by using a drive plate with good deformability for this type of laminate, the drive plate assists the deformation of the laminate and creates a collision angle suitable for joining. became possible. As a result, 1 it became possible to obtain a strong bond that cannot be obtained by the usual explosive crimping method.

Another feature of this invention is the surface protection of the 5-ply material.

In the method of the present invention, the surface protection prevents slight bonding between the drive plate and the laminate and keeps the surface of the laminate smooth. In the usual explosive crimping method, the upper surface of the laminate is coated with a resin to form a coating film. In addition, thin rubber or resin plates are sometimes used for explosive crimping of small experimental size.

However, these surface protection methods are not suitable for the method of the present invention. That is, no matter which surface protection is performed, these materials undergo a carbonization reaction when the drive plate collides with them due to explosive crimping, resulting in severe contamination and damage to the surface of the laminate. Furthermore, if the surface retention layer is thin, such as a resin coating, with a thickness of less than a few Zoo/jffE, the collision of the drive plate will cause a wave pattern peculiar to explosive crimping to occur on the surface of the composite material, requiring surface treatment such as polishing. In addition, the thickness of the mating material can be reduced by polishing. Even if you try to use a rubber plate or resin plate with a thickness of several hundred μm or more, it is not possible to obtain these with dimensions larger than the laminate, so the joints of the rubber plate or resin plate are the starting point and the thickness of the laminate is If the sheets crack and are stacked together, the step will be imprinted on the mating material, requiring a polishing process and reducing the thickness of the mating material. Moreover, even if a material with the same dimensions as the laminating material can be obtained, it is not easy to laminate the laminated material so that there are no voids.

In the method of the present invention, since the metal foil is pasted onto the laminated material, these problems are solved at once, and extremely good results can be obtained. By using metal foil, a smooth state can be maintained without any adverse effects. Furthermore, the metallic properties of metal foil make it possible to prevent contamination and damage caused by carbonization reactions and the like.

(Example) The present invention will be explained below with reference to Examples.

Example 1 The entire upper surface was covered with aluminum foil having a thickness of 20 μm, and the thickness was 31 J, the width was 1,500 mm, and the length was 3,000 mm.
0 zirconium plate with the same width and length, thickness 16. 5B of
They were stacked on top of each other with a gap of 3 mm on top of 42 plates. The top of this zirconium plate has a thickness of 3U1, a width of 1524us, and a length of 3
048 mg mild steel & (SPCC) with gap 3 all
(I- They were stacked so that they were parallel to each other. On this mild steel plate, 10% TNT, 5% pearlite, and
One piece of wood powder was mixed and placed evenly on 4Q powdered explosive 112 with a 7'C explosion velocity of 2200 m/g, and detonated with an electric detonator from the center of the long side end. Finished zirconium and 5B
It was confirmed by ultrasonic flaw detection that 42 clad plates were bonded over the entire surface. After heat treatment at 540° C. for 3 hours, test pieces were taken from each part and subjected to a shear test. The results showed a bonding strength of 9 f/- at 26 to 30'. The zirconium surface was smooth and without any damage. In this example, the mass ratio of the drive plate to the laminate material is 1.2 times.

Example 2 In the same combination of laminated material and base material as in Example 1, surface protection aluminum foil 80 μm 1 Thickness of drive plate ″f!: 5 m
As shown in Fig. 2, the PJ between the drive plate and the laminate was changed to 0 to 5U by opening 51El at the tip 6, and was explosively crimped with the same explosive of 139Kf as in Example 1. The same bonding performance was obtained. Slight linear depressions were observed on the zirconium surface at positions corresponding to the joints of the aluminum foil, but this was tolerable. The mass ratio with the driving plate mating material is 2.0 times.

Examples 3 to 7 Clad plates were manufactured in the same manner as in Example 1, except that the base material, laminate material, and drive plate shown in Table 1 were used. The results are shown in Table 1.

Margin below

[Brief explanation of drawings]

FIG. 1 is an assembled sectional view of one embodiment of the method of the present invention, and FIG.
The figure is an assembled sectional view of another embodiment of the method of the invention. In the figure; 1 is the base material, 2 is the laminate material, 3 is the metal foil, 4 is the drive plate, 5 is the gap between the base material 1 and the laminate material 2, 6 is the gap between the laminate material 2 and the drive plate 4, 7 8 indicates an explosive layer, and 8 indicates an electric detonator. Patent applicant: Asahi Kasei Industries, Ltd. Figure 1 Figure 2

Claims (1)

[Claims] 1. In the explosive crimping method, in which laminates are stacked on top of a base material with a gap therebetween, and an explosive layer on the laminate is detonated to compress the laminate to the base material, the laminate is bonded to the base material. A coating layer is provided on the upper surface of the
In addition, a metal plate with a mass per unit area of 1/2 to 5 times that of the laminate is used as a driving plate, and is superimposed on the laminate with a gap substantially parallel to the laminate, or the detonation side is in contact with the laminate,
Explosive crimping method 2, characterized in that the base material and the laminate are bonded by stacking them so that the other ends have a gap and detonating the explosive layer on the driving plate, and coating the upper surface of the laminate. The layer has a thickness of 10 μm to 1
The method of explosive crimping according to claim 1, characterized in that the method is made of a metal foil of 00 μm.