Apparatus and method for testing weld integrity

• US 7,284,447 B2
• Filed: 01/31/2005
• Issued: 10/23/2007
• Est. Priority Date: 02/12/2003
• Status: Expired due to Term

• Current Assignee: Randall Scarbourough
• Original Assignee: S & H Fabrication, Inc.
• Inventors: Scarborough, Randall L.
• Primary Examiner(s): NOORI, MASOUD H
• Application Number:
  US11/047,127
• Publication Number:
  US 20050204826A1
• Time in Patent Office: 995 Days
• Field of Search: 738/09, 738/50
• US Class Current: 73/850
• CPC Class Codes: G01N 2203/0042 Pneumatic or hydraulic means
• CPC Class Codes: G01N 3/20 by applying steady bending forces G01N3/26, G01N3/28 take precedence

Abstract

An apparatus and method for testing weld integrity is disclosed which is portable, self-contained, adaptable for field use in most locations, and can verify the integrity of attachment welds. The testing apparatus includes a cylinder or cylinders, attachable to the desired object to be tested on one end and to a cross bar on the other end, support beam or beams which, along with the cylinder or cylinders, support the test apparatus, a supply for pressurized fluid, and a control manifold for flow direction and pressure measurement. The pressurized fluid moves the cylinder shaft creating a load on the test piece. As the fluid pressure increases, the cylinder shafts extend or retract and exert a required load on the test piece. The test piece is then inspected for breakage or damage such as deformation or attachment weld cracking.

Claims

1. An apparatus for non-destructively testing the weld strength and integrity of at least one weld when desired comprising:

a framework including at least two pieces;

at least one fluid containing cylinder, for moving a piston therein inwardly and outwardly as fluid is moved out of or into the cylinder, respectively;

an attachment structure for attaching to a pad eye or any device to be tested;

a base;

said base including a clamp;

said at least one fluid containing cylinder attached to said clamp;

at least one bracket; and

said at least one bracket being releasably attached to said pad eye;

whereby moving fluid into said at least one fluid cylinder causes said piston to move outwardly, thereby pushing the bracket upward, thereby creating tension on the pad eye, thereby testing the integrity of the weld.

2. The apparatus of claim 1 further including;

at least two opposing arms;

said arms being attached substantially medially to each other in the shape of an “

X”

;

said arms having upper ends and lower ends;

at least one base;

at least one of said lower ends of said arms being attached to said pad eye;

at least one of said lower ends of said arms being attached to said base;

at least one fluid containing cylinder;

said fluid containing cylinder being attached between said upper ends of said arms;

whereby moving fluid into said at least one fluid cylinder causes said piston to move outwardly, thereby pushing the arm outward in a reverse-scissoring motion, thereby creating tension on the pad eye, thereby testing the integrity of the weld.

3. The apparatus in claim 1, further including:

a plurality of arms having top and bottom ends;

said arms being held via at least one hinge on the top ends;

said arms being releasably connected to at least one pad eye at said bottom end of each arm;

said arms being connected to at least one other arm via a fluid containing cylinder;

whereby moving fluid into the cylinder causes the piston to move outwardly to create tension on the pad eye, thereby testing the integrity of the weld.

4. The apparatus in claim 3, wherein said arms can be curved.

5. The apparatus in claim 3, wherein said arms can be angled.

6. The apparatus of claim 1, wherein the cylinder further comprises:

a first end and a second end;

a substantially cylindrical piston carried in said cylinder for movement therein along an axis, of said cylinder, being substantially perpendicular to a plane formed between a pad eye or any device to be tested and a weld attaching said pad eye or the device to be tested to a base;

a shaft, having a first end and a second end, the first end fixedly attached to said internal piston and said second end is fixedly attached to at least one of said arms; and

first and second pressurized fluid attachment apparatus;

wherein said first pressurized fluid attachment apparatus is disposed axially between said cylinder first end and said piston;

wherein said second pressurized fluid attachment apparatus is disposed axially between said cylinder second end and said piston; and

wherein pressurized fluid enters said cylinder through said first attachment apparatus or said second attachment apparatus.

7. The apparatus of claim 6, wherein said cylinder comprises:

said second end of said shaft is fixedly attached to at least one of said arms.

8. The apparatus in claim 1, further including:

a support column with a bottom and top end;

a support bar which is releasably attached to said pad eye;

said support bar being releasably attached to said support column;

a bridge plate or cross bar;

said support column being releasably attached to said bridge plate or column;

at least two fluid containing cylinders;

said cylinders being attached to said bridge plate or cross bar;

a base;

said cylinders also being attached to the base;

whereby moving fluid into the cylinder causes the piston to move outwardly,

thereby pushing the bridge plate and support column upward, this will also cause said bar to move upward thereby creating tension on the pad eye, thereby testing the integrity of the weld.

9. The apparatus of claim 8 whereby;

moving fluid into the cylinder causes the piston to move downwardly, thereby

pulling the bridge plate and support column downward, this will also said bar to move downward thereby creating tension on the pad eye, thereby testing the integrity of the weld.

10. The apparatus of claim 1 whereby;

moving fluid into said at least one fluid cylinder causes said piston to move

inwardly, thereby pulling the bracket downward, thereby creating tension on the pad eye, thereby testing the integrity of the weld.

11. The apparatus of claim 1 whereby,

said clamp is attached to a beam.

12. The apparatus of claim 1 whereby,

said clamp is attached to a pole.

13. The apparatus of claim 2 whereby;

moving fluid into said at least one fluid cylinder causes said piston to move

inwardly, thereby pulling the arm outward in a scissoring motion, thereby creating tension on the pad eye, thereby testing the integrity of the weld.

14. A method for testing weld strength and integrity of an attachment weld when desired comprising the steps of:

providing a desired test piece wherein said test piece comprises a pad eye,

lifting lug, or other device being tested;

providing a framework including at least two pieces;

providing at least one fluid cylinder, having a first end and a second end,

mounted with the framework, for moving a piston therein inwardly and outwardly as fluid is moved out or in respectively;

providing a first and second attachment apparatus, wherein a pressurized fluid

can enter in or exhaust from said cylinder;

providing an attachment structure for attaching to said test piece;

providing said mounted framework; and

assembling the framework with the mounted cylinder fixedly attached on the

mounted framework;

whereby urging fluid into the cylinder causes the piston to move outwardly to

tension the pad eye thus testing the integrity of the weld, and

whereby the testing technician or test operator can inspect the tested device

and the weld for any structural damage or deformation.

15. The method as in claim 14, whereby urging fluid into the cylinder causes the piston to move inwardly to tension the test piece thus testing the integrity of the weld.

16. The method as in claim 14, further providing said mounted framework with;

a plurality of arms having top and bottom ends;

attaching said arms via at least one hinge on the top ends;

releasably connecting said arms to at least one pad eye at said bottom end of

each arm;

releasably connecting said arms to at least one other arm via a fluid containing

cylinder;

moving fluid into the cylinder to cause the piston to move outwardly to create tension on the pad eye, thereby testing the integrity of the weld.

17. The method of claim 16 whereby;

moving fluid into the cylinder to cause the piston to move inwardly to create

tension on the pad eye, thereby testing the integrity of the weld.

18. The method as in claim 14, further providing said mounted framework with;

a support column with a bottom and top end;

releasably attaching a support bar to said pad eye;

releasably attaching said support bar to said support column;

providing a bridge plate or cross bar;

releasably attaching said support column to said bridge plate or cross bar;

providing at least two fluid containing cylinders;

attaching said cylinders to said bridge plate or column;

providing a base;

attaching said cylinders to said base;

moving fluid into the cylinder causing said piston to move outwardly, thereby

pushing the bridge plate and support column upward, also causing said bar to move upward thereby creating tension on the pad eye, thereby testing the integrity of the weld.

19. The method of claim 18 whereby;

moving fluid into the cylinder causes the piston to move downwardly, thereby

pulling the bridge plate and support column downward, also causing said bar to move downward thereby creating tension on the pad eye, thereby testing the integrity of the weld.

20. The method of claim 14, further providing;

a base;

attaching a clamp to said base;

attaching at least one fluid containing cylinder to said clamp;

providing at least one bracket;

releasably attaching said at least one bracket to said pad eye;

moving fluid into said at least one fluid cylinder causing said piston to move

outwardly, thereby pushing the bracket upward, thereby creating tension on the pad eye, thereby testing the integrity of the weld.

21. The method of claim 20 whereby;

moving fluid into said at least one fluid cylinder causes said piston to move

inwardly, thereby pulling the bracket downward, thereby creating tension on the pad eye, thereby testing the integrity of the weld.

22. The method of claim 20 providing,

attaching said clamp to a beam.

23. The method of claim 20 providing,

attaching said clamp to a pole.

24. The method of claim 14, further including;

providing at least two opposing arms;

attaching said arms substantially medially to each other in the shape of an “

X”

;

providing said arms with upper ends and lower ends;

providing at least one base;

attaching at least one of said lower ends of said arms to said pad eye;

attaching at least one of said lower ends of said arms to said base;

providing at least one fluid containing cylinder;

attaching said fluid containing cylinder between said upper ends of said arms;

moving fluid into said at least one fluid cylinder causing said piston to move

outwardly, thereby pushing the arm outward in a reverse-scissoring motion, thereby creating tension on the pad eye, thereby testing the integrity of the weld.

25. The method of claim 24 whereby;

moving fluid into said at least one fluid cylinder causing said piston to move

inwardly, thereby pulling the arm outward in a scissoring motion, thereby creating tension on the pad eye, thereby testing the integrity of the weld.

26. The method as in claim 14, further including calculating a required cylinder test pressure, comprising the steps of:

determining a required test load based on the weight to be supported by the

test piece;

determining an effective area of the cylinder piston;

dividing said test load by the effective area of the cylinder piston;

assembling the framework with the mounted cylinder fixedly attached at the

first end of said cylinder to said test piece;

retracting the cylinder shaft thereby exerting a force substantially

perpendicular to a plane formed between a pad eye or other lifting lug being tested and a weld attaching said pad eye or lifting lug to a base and away from said test piece;

increasing said substantially perpendicular force by increasing the pressure of

the pressurized fluid in the cylinder;

increasing said pressure until the calculated required pressure is reached; and

inspecting the test piece and its attachment weld for any structural damage or deformation.

27. A method for testing the strength and integrity of an attachment weld when

desired with a single cylinder apparatus comprising the steps of:

providing at least one desired test piece;

providing a framework including at least two pieces;

mounting said single cylinder to the framework, said cylinder having a first

end, a second end, and a piston therein, wherein said piston moves inwardly and outwardly as fluid is moved out of or into said cylinder respectively;

mounting said framework about said at least one desired test piece;

assembling the framework with said at least one mounted cylinder fixedly attached at one end of said cylinder to said desired test piece;

retracting the cylinder shaft thereby exerting a force substantially

perpendicular to a plane formed between said desired test piece, being tested, and a base and in a direction away from said test piece;

increasing said substantially perpendicular force by increasing the pressure of

the fluid in the cylinder;

increasing said pressure until a pre-calculated required pressure is reached; and

inspecting the test piece for damage or deformation.

28. The method as in claim 27 wherein said test piece comprises pad eye, lifting lug, or other device to be tested.

29. A method for non-destructively testing strength and integrity of a structure with a multiple cylinder test apparatus comprising the steps of:

providing at least one desired test piece;

providing a framework including at least two pieces;

wherein said base may

be a part of said desired test piece;

mounting a plurality of fluid cylinders to the framework, said plurality of fluid

cylinders each having a first end, a second end, and a piston therein, wherein said pistons each moving inwardly and outwardly as fluid is moved out of or into said plurality of fluid cylinders respectively;

mounting said framework about said at least one desired test piece;

assembling the framework with said plurality of fluid cylinders each fixedly

attached at said first end of each said plurality of fluid cylinders to said base and at said second end to a cross bar;

extending the cylinder shafts thereby exerting a force substantially

perpendicular to and toward said cross bar;

transferring said force from said cross bar to a support beam which is attached

to said desired test piece;

transferring said force from said support beam to said desired test piece;

increasing said force by increasing the pressure of the fluid in the cylinder;

increasing the pressure until a pre-calculated required pressure is reached, wherein said pre-calculated required pressure produces a force which is below the rated strength of the test piece; and

inspecting the test piece for damage or deformation.

30. A method for non-destructively testing the strength and integrity of a test piece having first and second parts, which comprises:

anchoring the first part of the test piece;

attaching a piston from a hydraulic cylinder to the second part of the test piece;

moving the piston to put the test piece under tension, wherein the load produced under the tension is below the rated strength of the test piece; and

inspecting the test piece for damage.

31. The method according to claim 30, wherein said test piece is a pad eye.