Original plate material for heat-exchanging plate, and method for fabricating original plate material for heat-exchanging plate

Patent metadata

Field	Value
Publication number	US-9656313-B2
Application number	US-201113643715-A
Country	US
Kind code	B2
Filing date	Apr 27, 2011
Priority date	Apr 28, 2010
Publication date	May 23, 2017
Grant date	May 23, 2017

Abstract

An original plate material for a heat-exchanging plate fabricated by press working and a method for fabricating the original plate material are provided. An original plate material for a heat-exchanging plate is a flat plate material made of titanium on the surface of which convex parts and concave parts are formed, and the heat-exchanging plate is fabricated by press working the original plate material. The convex parts and the concave parts are formed in a manner such that the shape parameter defined by (Rz×L/P) is 12 μm or less, where Rz (μm) denotes the height of the convex parts, L (μm) denotes the width of the concave parts, and P (μm) denotes the pitch between neighboring convex parts.

First claim

The invention claimed is:

1. An original plate material for a heat-exchanging plate, the original plate material comprising:
a recessed part and projecting parts on a surface of a titanium flat plate material, the original plate material being subject to press working so as to be used as a heat-exchanging plate,
wherein the projecting parts are formed so as to be arranged in a staggered manner in plan view on the surface of the flat plate material such that a first line connecting centers of the projecting parts adjacent to each other in a lateral direction is not perpendicular to a second line connecting the centers of the projecting parts in a vertical direction, and
wherein the recessed part and the projecting parts are formed such that, when a height of the projecting parts is Rz in μm, a width of the recessed part, defined as a shortest distance between the projecting parts adjacent to each other in the lateral or vertical direction, is L in μm, and a pitch, defined as a distance between the centers of the projecting parts adjacent to each other, is P in μm, a shape parameter defined by Rz×L/P is 4 μm to 12 μm.

2. The original plate material for a heat-exchanging plate according to claim 1 , wherein the projecting parts each have a circular shape in plan view.

3. The original plate material for a heat-exchanging plate according to claim 2 , wherein the width of the recessed part L is obtained by the following equation:
L=P −( D/ 2)×2,

where D is a diameter of the projecting parts.

4. The original plate material for a heat-exchanging plate according to claim 1 , wherein each of the projecting parts includes a trapezoidal shape in sectional view having first and second upper walls that extend upwards and a front wall that connects upper edges of the upper walls in a horizontal direction.

5. The original plate material for a heat-exchanging part according to claim 1 , wherein the projecting parts have a trapezoidal shape in a sectional view.

6. An original plate material for a heat-exchanging plate, the original plate material comprising:
a recessed part and projecting parts on a surface of a titanium flat plate material, the original plate material being subject to press working so as to be used as a heat-exchanging plate,
wherein the projecting parts are formed so as to be arranged in a staggered manner in plan view on the surface of the flat plate material such that a first line connecting centers of the projecting parts adjacent to each other in a lateral direction is not perpendicular to a second line connecting the centers of the projecting parts in a vertical direction,
wherein the recessed part and the projecting parts are formed such that, when a height of the projecting parts obtained as a ten-point average roughness is Rz in μm, a width of the recessed part, defined as a shortest distance between the projecting parts adjacent to each other in the lateral or vertical direction, is L in μm, and a pitch, defined as a distance between the centers of the projecting parts adjacent to each other, is P in μm, a shape parameter defined by Rz×L/P is 12 μm or smaller, and
wherein the height Rz of the projecting parts is at least 5 μm, and equal to or smaller than 0.1×t in μm, where t (μm) is a thickness of the flat plate material.

7. An original plate material for a heat-exchanging plate, the original plate material comprising:
a recessed part and projecting parts on a surface of a titanium flat plate material, the original plate material being subject to press working so as to be used as a heat-exchanging plate,
wherein the projecting parts are formed so as to be arranged in a staggered manner in plan view on the surface of the flat plate material such that a first line connecting centers of the projecting parts adjacent to each other in a lateral direction is not perpendicular to a second line connecting the centers of the projecting parts in a vertical direction,
wherein the recessed part and the projecting parts are formed such that, when a height of the projecting parts is Rz in μm, a width of the recessed part, defined as a shortest distance between the projecting parts adjacent to each other in the lateral or vertical direction, is L in μm, and a pitch, defined as a distance between the centers of the projecting parts adjacent to each other, is P in μm, a shape parameter defined by Rz×L/P is 4 μm to 12 μm or smaller, and
wherein the width of the recessed part L is 200 μm or more.

Assignees

• Fujii Yasuyuki
• Okamoto Akio
• Itsumi Yoshio
• Fujita Akihisa
• Kobe Steel Ltd

Inventors

• Fujii Yasuyuki
• Okamoto Akio
• Itsumi Yoshio
• Fujita Akihisa

Classifications

• F28F21/08

  of metal · CPC title

• B21D53/04

  of sheet metal · CPC title

• B21D53/02

  heat exchangers {or parts thereof}, e.g. radiators, condensers {fins, headers}(making finned or ribbed tubes by fixing strip material or the like to tubes B21C37/22) · CPC title

• Y10T29/4935

  Heat exchanger or boiler making · CPC title

• B21D13/04 Primary

  by rolling · CPC title