Method and apparatus for thermal testing

• US 4,519,718 A
• Filed: 07/23/1982
• Issued: 05/28/1985
• Est. Priority Date: 07/23/1982
• Status: Expired due to Fees

• Current Assignee: Allstate Financial LLC (Allstate Corporation)
• Original Assignee: Procedyne Corp.
• Inventors: Staffin, H. Kenneth, Roaper, Robert B., Bickford, Karin S.
• Primary Examiner(s): Stearns, Richard R.
• Assistant Examiner(s): Worth, W. Morris
• Application Number:
  US06/401,090
• Time in Patent Office: 1,040 Days
• Field of Search: 34/57 A, 34/62, 374/45, 374/57 A, 374/4, 374/5, 432/15, 432/58, 432/261
• US Class Current: 374/45
• CPC Class Codes: G01N 25/00 Investigating or analyzing materials by the use of thermal means G01N3/00 - G01N23/00 take precedence
• CPC Class Codes: G01N 3/60 Investigating resistance of materials, e.g. refractory materials, to rapid heat changes thermal testing of structures or apparatus G01M99/002

Abstract

A device for thermal shock testing and thermal cycling of workpieces is provided which comprises at least one fluidized bed chamber for thermally treating a workpiece. Agitation of the area about the workpiece is accomplished by movement of the workpiece, by baffles, or by providing a supplementary gas distributor. The agitation provided increases the flow rate of particles of the fluidized bed particulate media in a localized area about the workpiece, thus increasing the rate of heat transfer between the bed media and the workpiece, and increasing thermal shock capacity of the thermal shock tester.

Claims

1. A device for thermal testing, which comprises:

a first enclosure for an expanded mass of solid particles suspended in a fluidizing gas that behaves like a liquid;

a second enclosure for an expanded mass of solid particles suspended in a fluidizing gas that behaves like a liquid;

a least one temperature adjustment means provided for controlling the temperature of each enclosure;

a support means for supporting a workpiece in one of the first or second enclosures and adapted to transfer the workpiece from one enclosure to the other;

an agitating means affixed to the support means for agitating the support means in order to increase turbulence in the vicinity of the workpiece.

2. A device for thermal testing, which comprises:

a first enclosure for an expanded mass of solid particles suspended in a fluidizing gas that behaves like a liquid;

a second enclosure for an expanded mass of solid particles suspended in a fluidizing gas that behaves like a liquid;

at least one temperature adjustment means provided, for controlling the temperature of each enclosure;

a support means for supporting a workpiece in one of the first or second enclosures and adapted to transfer the workpiece from one enclosure to the other; and

at least one baffle affixed to the support means for detecting fluid flow of the expanded mass in order to increse turbulence in the vicinity of the workpiece during thermal operations.

4. A device for thermal testing as recited in claim 2 or 3, further comprising:

a transfer means for automatically transferring the support means and workpieces disposed therein from the first enclosure to the second enclosure.

5. A device for thermal testing as recited in claim 2, wherein:

the baffle is a conically shaped plate affixed to the support means and tapering toward the vicinity of the workpiece.

3. A device for thermal testing, which comprises:

a first enclosure for an expanded mass of solid particles suspended in a fludizing gas that behaves like a liquid, the fluidizing gas being supplied to the enclosure by a first supply means;

a second enclosure for an expanded mass of solid particles suspended in a fluidizing gas that behaves like a liquid, the fluidizing gas being supplied to the enclosure by a second supply means;

at least one temperature adjustment means provided for controlling the temperature of each enclosure;

a support means for supporting a workpiece in one of the first or second enclosures and adapted to transfer the workpiece from one enclosure to the other; and

a supplementary fluidizing gas distributor provided in at least one enclosure located above the associated supply means and below the support means, adapted to increase the flow rate of air toward the workpiece holder.