JPH04307241A - Preparation of composite metal plate - Google Patents

Abstract

PURPOSE:To uniformize the thickness of a composite metal plate by controlling a roll profile by changing the quantity of the heat applied to a press bonding roll corresponding to the thickness difference between a skin material and a product measured in the lateral direction of the roll on the inlet/outlet side thereof. CONSTITUTION:The thicknesses of skin materials 1, 2 having dried resin films are respectively measured by thickness meters 3a, 3b having measuring points at the same pitch in the lateral direction thereof. Next, both skin materials 1, 2 are bonded under pressure by press bonding rolls 4, 5 to form a composite metal plate 6 and the thickness of said plate 6 is measured at the same measuring positions as the skin materials 1, 2 by a thickness meter 3c. The respective measured values are inputted, for example, to a CPU and the difference between them is fed back to the induction heating control units of the press bonding rolls 4, 5. For example, by increasing a thermal crown by heating the parts of the rolls 4, 5 corresponding to the parts larger than other parts in thickness, a roll profile is controlled so as to uniformize the thickness of the composite steel plate 6 in the lateral direction thereof.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a composite metal plate which is provided with uniform weldability, adhesive properties, etc. by controlling the roll profile so that the plate thickness is uniform across the entire width.

0002

[Prior Art] Generally, composite metal plates are made by sending two metal coils, which serve as the skin material, onto a line using a payoff reel, and in the middle of the line, undergo processes such as degreasing and chromate treatment, and then coat one side with resin, which serves as an adhesive. After coating and drying the resin in a drying oven, the two sheets of the skin material are pressed together using a pressure roll of a pressure cooling device. However, when imparting resistance weldability to the composite metal plate, conductive metal particles are blended into the resin.

0003

[Problems to be Solved by the Invention] The composite metal plate manufactured as described above should have uniform weldability and adhesive strength over the entire surface. Uniform crimp is required. However, to date, no prior art has been disclosed that particularly refers to the uniform pressability of the press roll in the press-bonding process.

[0004] Therefore, in the conventional roll crimping method,
There are hidden factors that impede uniform roll reduction, such as roll deflection during rolling and the formation of thermal crowns due to the heating process, but if crimping is performed without taking countermeasures against these factors, This results in variations in weldability, adhesive strength, etc. in the width direction of the composite metal plate. However, there is a problem in that it is currently difficult to correct changes in thermal crown and roll deflection caused by the above-mentioned sheet width and sheet temperature.

[0005] The present invention has been made in view of these conventional problems, and is a method of changing the amount of heat input to the crimping roll according to the difference in plate thickness measured at the input and exit sides of the crimping roll. The aim is to solve the above problems by adopting methods such as

[0006]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention, when manufacturing a composite metal plate, adjusts the plate thickness and resin film thickness of each metal plate on the entry side of the pressure roll to the exit side of the pressure roll. The thickness of the composite metal plate is measured at corresponding positions in the width direction, and the amount of heat input to the pressure roll in the axial direction is calculated according to the position where the measured value differs and the size of the difference. This is a method for manufacturing a composite metal plate in which the thickness of the composite metal plate is made uniform by controlling the roll profile by changing the roll profile.

[0007]

[Operation] Since the present invention has the above-described structure, the two skin materials having the dried resin film immediately before the pressure bonding are
The thickness of each board is measured using the same type of board thickness gauge that has measuring points at the same pitch in the board thickness direction (resin film is the method that does not apply resin and feeds the resin film to the input side of the pressure roll. (measure the thickness).

[0008] Next, the two skin materials crimped with a pressure roll become a composite metal plate, which is measured at the same measurement position as the skin material using the same type of plate thickness gauge as the skin material on the exit side of the pressure roll. The measured values measured by each of the plate thickness gauges mentioned above are inputted to, for example, a CPU and calculated, and the results are fed back to the induction heating control device of the pressure roll, etc., and the required portions of the roll corresponding to the difference in plate thickness are For example, the roll profile is controlled so that the thickness of the product is uniform in the width direction by heating a portion of the roll corresponding to a portion where the thickness is greater than other portions to increase the thermal crown.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below with reference to the drawings. FIG. 1 is a conceptual diagram of an embodiment according to the present invention.

In FIG. 1, metal plates (steel plates in this embodiment) 1 and 2, which are skin materials, are placed on the entry side of pressure rolls 4 and 5.
Same type plate thickness meter 3 with measurement points at the same pitch in the plate width direction
Measure the plate thickness at points a and 3b. Next, the skin materials 1 and 2 crimped by the crimping rolls 4 and 5 become a composite steel plate 6, which is measured at the same measurement position as the skin materials 1 and 2 by the same type of plate thickness gauge 3c on the exit side of the crimping rolls in the same way as the skin material. The plate thickness is measured.

[0011]Then, each of the plate thickness gauges 3a and 3b mentioned above
, 3c, the measured values are input to the CPU, the difference between them is calculated, and the result is fed back to the induction heating control device (not shown) of the crimping rolls 4 and 5, and the crimping process corresponding to the difference in plate thickness is performed. Required parts of the rolls 4 and 5, for example, parts of the rolls corresponding to parts where the plate thickness is larger than other parts, are heated to enlarge the thermal crown, so that the thickness of the composite steel plate 6 is made uniform in the width direction. The role profile is controlled by As a result, a product having uniform thickness over the entire surface is obtained.

Next, in FIGS. 2 and 3, 0.5×
The results of an example using a steel plate coil of 1200 mm size are shown.

At this time, a polyester resin was applied as an adhesive to a thickness of 30 μm, and Ni particles (50 μm diameter) were mixed as a conductive filler. The plate thickness gauge was a laser distance meter, and the measurement pitch in the plate width direction was every 100 mm. The type of pressure roll used was a split induction heating roll.

[0014] Figures 2 and 3 are graphs showing the resistance weldability and adhesion strength of damping steel plates manufactured in this example and as a comparative example using a method in which the plate thickness was not measured on the inlet and outlet sides of the rolls. It is something. As is clear from the figure, it can be seen that the above-mentioned performances are uniform in the products manufactured according to the present invention.

[0015]

[Effects of the Invention] As explained above, according to the present invention,
By measuring the thickness of the skin material and product at the input and exit sides of the crimping roll, and calculating the measured values via a CPU etc., the results are fed back to the crimping roll to change the amount.
The manufacturing method controls the roll profile according to the difference in plate thickness, resulting in uniform resistance welding across the entire width.
A composite metal plate with adhesive strength etc. could be obtained.

[Brief explanation of drawings]

FIG. 1 is a conceptual diagram showing an embodiment of the present invention.

FIG. 2 is a diagram comparing resistance weldability between an example and a conventional example.

FIG. 3 is a diagram comparing adhesive strength between the example and the conventional example.

[Explanation of symbols]

1 Metal plate 2 Metal plate 4 Crimping roll 5 Crimping roll 6 Composite metal plate

Claims (1)

[Claims] Claim 1: When manufacturing a composite metal plate, the thickness and resin film thickness of each metal plate are matched to each other in the width direction on the input side of the pressure roll, and the plate thickness of the composite metal plate is matched on the exit side of the pressure roll. The thickness of the composite metal sheet can be adjusted by controlling the roll profile by changing the amount of heat input to the pressure roll in the axial direction according to the position where the difference in measurement value occurs and the size of the difference. A method for manufacturing a composite metal plate characterized by uniformity.