US20060005598A1 - Weld box auto roll sensing and positioning system - Google Patents
Weld box auto roll sensing and positioning system Download PDFInfo
- Publication number
- US20060005598A1 US20060005598A1 US10/885,494 US88549404A US2006005598A1 US 20060005598 A1 US20060005598 A1 US 20060005598A1 US 88549404 A US88549404 A US 88549404A US 2006005598 A1 US2006005598 A1 US 2006005598A1
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- United States
- Prior art keywords
- roll
- load
- parameter
- axis
- weld box
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/083—Supply, or operations combined with supply, of strip material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered seams
- B21C37/0822—Guiding or aligning the edges of the bent sheet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/34—Feeding or guiding devices not specially adapted to a particular type of apparatus
- B21C47/3408—Feeding or guiding devices not specially adapted to a particular type of apparatus for monitoring the lateral position of the material
- B21C47/3416—Feeding or guiding devices not specially adapted to a particular type of apparatus for monitoring the lateral position of the material with lateral edge contact
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49764—Method of mechanical manufacture with testing or indicating
- Y10T29/49771—Quantitative measuring or gauging
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
- Y10T29/5185—Tube making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/53—Means to assemble or disassemble
- Y10T29/53039—Means to assemble or disassemble with control means energized in response to activator stimulated by condition sensor
Definitions
- the present invention relates to a tube milling and welding system and, more particularly, to a feedback and control system for optimizing weld quality during the operation of a tube milling and welding system.
- Tube milling operations typically include taking stock material from a roll and through a series of operations converting it into a welded tube.
- the first step of the process includes removing burrs and uneven edges from the stock material.
- the stock material is then passed through a series of rolls mounted on shafts. The rolls apply a forging pressure to progressively curve the stock material toward the form of a cylinder. Once the material is formed substantially into a cylinder it is welded into a tube.
- the rate of speed that the stock material travels through the mill and the position of each of the rolls are substantially fixed for a given size stock material. Therefore, any slight deformity in the stock material can decrease weld quality.
- timely inspection of each welded seam is critical. Without timely inspection, a tremendous amount of material can be wasted due to improper seam alignment and/or forging pressure.
- a weld box joins opposing edges of the stock material at generally the same height.
- the most common method for inspecting the edge alignment is for an operator to hold a gloved hand on the welded seam. The operator then feels for inconsistencies in the welded seam. This method produces safety and accuracy concerns.
- an operator cuts samples of the welded tube and inspects sample seams under a microscope. Such inspection can be time consuming, cost prohibitive and due to the random nature of sample testing, ineffective.
- Yet another method of inspecting weld quality includes utilizing a digital camera to substantially continuously image the welded seam. The images are then presented on a monitor for a technician to inspect.
- the welded seam and environment tend to be very dirty. Therefore, the image quality tends to be poor, resulting in an ineffective inspection.
- FIG. 1 is a perspective view of a tube mill arranged in accordance with the principles of the present invention
- FIG. 2 is a cross-sectional view taken through line II-II of FIG. 1 ;
- FIG. 3 is a block diagram of a controller and a welding portion of the tube mill of FIG. 1 ;
- FIG. 4 is a flow chart illustrating a method of monitoring and controlling the tube mill of FIG. 1 .
- FIG. 1 depicts a tube mill 10 including a pre-stage portion 12 , a welding portion 14 , and a sizing and cutting portion 16 .
- a roll of stock material 18 is introduced to the pre-stage portion 12 .
- the stock material 18 includes a roll of sheet material such as sheet metal.
- the pre-stage portion 12 gradually forms the stock material 18 into a semi-tubular member 18 a of approximately 320 degrees.
- the semi-tubular member 18 a is then introduced to the welding portion 14 of the tube mill 10 .
- the welding portion 14 simultaneously compresses the semi-tubular member 18 a into a substantially 360 degree cylinder and joins opposite edges thereof to provide a continuous tube 18 b of generally constant diameter.
- the tube 18 b then exits the welding portion 14 and is introduced to the sizing and cutting portion 16 .
- the sizing and cutting portion 16 is adapted to cut the tube 18 b into a plurality of links (not shown) having predetermined lengths as may be desired. It should be appreciated that while the pre-stage portion 12 has been disclosed as producing a semi-tubular member 18 a of approximately 320 degrees, a pre-stage portion 12 producing a semi-tubular member having an alternative geometry is intended to be within the scope of the present invention.
- the pre-stage portion 12 includes a seam preparation station, a plurality of forming stations, an edge conditioning station, and a seam guide.
- the seam preparation station generally removes burrs from the edges of the stock material 18 . This may be achieved with grinding wheels, wire brushes, or any other material removing means.
- the plurality of forming stations form the stock material 18 from a substantially planar member into the semi-circular member 18 a . This is achieved by forcing the stock material 18 through a series of rollers spaced progressively closer apart.
- the edge conditioning station de-burrs the edges of the stock material 18 a second time to ensure a controlled finish.
- the seam guide includes at least one fin for guiding the edges of the stock material 18 toward the welding portion 14 at a predetermined spacing that is suitable for welding.
- FIG. 2 depicts the welding portion 14 including a weld box 20 , a controller 22 , and a weld apex 24 .
- the stock material 18 travels through the welding portion 14 to be welded into a tube 18 b .
- the weld apex 24 forms a substantially continuous weld bead joining the edges of the semi-circular member 18 a .
- the weld box 20 is constructed of sheet metal and includes sidewalls 20 a having dual walled construction.
- the sidewalls 20 a are adapted to substantially continuously carry a coolant flow, such as chilled water. It is envisioned that the sidewalls 20 a may define an elongated serpentine channel between the dual walls for carrying the coolant flow. The coolant flow removes heat from inside the weld box 20 that is generated by forging and welding the stock material 18 . It should be appreciated that while only the sidewalls 20 a have been disclosed as being dual walled, a weld box 20 having dual walled top and/or bottom walls is also intended to be within the scope of the present invention. It should further be appreciated that the weld box 20 is envisioned to include an inlet port (not shown) and an outlet port (not shown).
- the inlet port is for delivering the coolant flow to the sidewalls 20 a and the outlet port is for removing the coolant flow from the sidewalls 20 a , thereby providing a continuous flow.
- the weld box 20 could be filled with an inert gas.
- the weld box 20 is filled 98% with argon gas.
- the argon gas is heavier than oxygen, which comprises the remaining 2% of atmosphere in the weld box 20 , and, therefore, serves to prevent impurities such as water, oil, or any other contaminant from obstructing the weld apex 24 during the welding and forming processes.
- an oxygen sensor (not shown) is employed to substantially continuously monitor the level of oxygen in the weld box 20 and terminate operation of the tube mill 10 if the level rises above 2%.
- the weld box 20 positions the stock material 18 .
- the weld box 20 includes first and second rolls 26 rotatably supported on shafts 41 .
- the rolls 26 and shafts 41 are constructed of a thermally conductive material, such as aluminum or steel.
- the rolls 26 apply a forging pressure for compressing and guiding the stock material 18 through the weld box 20 .
- the first and second rolls 26 include substantially parallel rotational axes, each identified by B, and a common lateral axis A.
- the lateral axis A is substantially perpendicular to the rotational axes B.
- the first and second rolls 26 each include concave forming surfaces 28 integrally formed with top caps 30 and bottom caps 32 .
- the forming surfaces 28 are designed to generally conform to the shape of the tube 18 b .
- the top and bottom caps 30 , 32 include external cylindrical surfaces 30 a , 32 a .
- rolls 26 having alternative geometries are intended to be within the scope of the present invention.
- the rolls 26 may include cylindrical rolls.
- the shafts 41 rotatably supporting the rolls 26 are hollow. Similar to the sidewalls 20 a discussed above, the hollow shafts 41 are adapted to carry a coolant flow, such as chilled water.
- the coolant flow serves to remove heat from the rolls 26 generated by forging the stock material 18 during normal operation of the tube mill 10 . It is envisioned that the hollow shafts 41 would also include an inlet port (not shown) and an outlet port (not shown) for delivering and removing the coolant flow therefrom.
- the weld box 20 further includes a vertical position sensor 34 , a horizontal position sensor 36 , a load sensor 38 , and a roll translating device 40 .
- the vertical and horizontal position sensors 34 , 36 are in data communication with the controller 22 .
- the vertical and horizontal position sensors 34 , 36 each include an optical transmitter and an optical sensor.
- the optical transmitters may include laser-generating devices and the optical sensors may include charge coupled devices.
- the optical transmitters of the vertical position sensors 34 project an optical signal to a top surface of the rolls 26 .
- the optical signals deflect off of the top surfaces of the rolls 26 and are received by the optical sensors.
- the horizontal position sensors 36 project an optical signal to the external cylindrical surfaces 30 a of the top caps 30 of the rolls 26 .
- the optical signals deflect off of the external cylindrical surfaces 30 a and are received by the optical sensors.
- the vertical and horizontal position sensors 34 , 36 then send signals to the controller 22 .
- the signals represent a characteristic of the optical signals received.
- the position sensors 34 , 36 send a signal identifying the magnitude of the optical signal received.
- the controller 22 then processes these signals to determine the vertical and horizontal positions of the rolls 26 relative to the weld box 20 , as will be described in more detail below.
- the vertical and horizontal position sensors 34 , 36 have been disclosed herein as including optical-based position sensors, alternative positioning sensors such as sonar-based sensors or any other type of sensor operable to detect position is intended to be within the scope of the present invention.
- the load sensors 38 each include a form of load cell.
- the load cells are each envisioned to include a linear strain gage load cell, a non-linear strain gage load cell, a piezoelectric load cell, or any other type of electromechanical load detecting device capable of serving the principles of the present invention.
- the load cells each include a load button 39 operably connected to a strain-gage (not shown) disposed in the load sensor 38 .
- the load sensors 38 also include a biasing member (not shown) such as a spring biasing the load buttons 39 toward the rolls 26 .
- the load buttons 39 are in constant engagement with the external cylindrical surfaces 32 a of the bottom caps 32 of the rolls 26 .
- any displacement of the rolls 26 along axis A displaces the load buttons 39 and deforms the strain gages disposed in the load sensors 38 . This deformation changes the electrical resistance across the strain gages.
- the load sensors 38 then send a signal representing this change in electrical resistance to the controller 22 for processing, which will be described in more detail below.
- the stock material 18 being substantially uniform in size and construction, the stock material 18 should apply a substantially uniform force on the rolls 26 .
- the stock material 18 may include discrepancies in size and construction that alter the force applied to the rolls 26 . For example, a slightly wider or thicker portion of the stock material 18 may increase the force applied to the rolls 26 . Alternatively, a slightly narrower or thinner portion of the stock material may decrease the force applied to the rolls 26 .
- each of the roll translating devices 40 may include a single multi-axis electrical motor, two single-axis electrical motors, a hydraulic actuator, or any other device or combination of devices actuable by the controller 22 and operable to serve the principles of the present invention.
- FIG. 3 depicts the controller 22 including a processor 42 , an electronic storage unit 44 , and a user interface 46 .
- the processor 42 of the controller 22 is in data communication with the roll translating devices 40 , the vertical position sensors 34 , the horizontal position sensors 36 , and the load sensors 38 .
- the electronic storage unit 44 is adapted to store a variety of operational parameters for the tube mill 10 and, more specifically, for the weld box 20 .
- the operational parameters include horizontal roll position parameters, vertical roll position parameters, and load parameters.
- the horizontal and vertical position parameters are envisioned to include a distance value identifying a distance that the rolls 26 are to be positioned from the position sensors 34 , 36 .
- the load parameters are envisioned to include a force value that the stock material 18 applies on the rolls 26 during normal milling operations.
- the user interface 46 includes a display device and an input device.
- the display device includes a video monitor and the input device includes a keypad.
- the user interface 46 is adapted to display the operational parameters and any other relevant information to a technician.
- the user interface 46 is adapted to receive operational parameters to be stored in the electronic storage unit 44 . In this manner, a technician may enter operational parameters for a plurality of different tube milling operations into the user interface 46 . The user interface 46 then sends these parameters to the processor 42 , which appropriately stores them in the electronic storage unit 44 .
- FIG. 4 depicts a flow chart illustrating a feedback and control process performed by the controller 22 .
- the processor 42 receives information from a technician via the user interface 46 . This information identifies the specific stock material 18 being formed.
- the processor 42 retrieves a set of operational parameters from the electronic storage unit 44 matching that stock material 18 , as identified by block 48 .
- the operational parameters include vertical position parameters, horizontal position parameters, and load parameters.
- the processor 42 receives a horizontal position signal from each of the horizontal position sensors 36 and a vertical position signal from each of the vertical position sensors 34 , as identified by block 50 .
- the processor 42 compares the horizontal and vertical position signals to the horizontal and vertical position parameters retrieved from the electronic storage unit 44 , as identified by block 52 . If the processor 42 determines that the position signals match the position parameters, the processor proceeds to block 56 and receives load signals from the load sensors 38 . Alternatively, if the processor 42 determines that any of the position signals do not match their respective position parameters, the processor 42 instructs the roll translating devices 40 to adjust the first and second rolls 26 in accordance with the difference between the position signals and position parameters, as identified by block 54 . Once the rolls 26 are properly positioned, the processor 42 proceeds to block 56 and receives load signals from the load sensors 38 .
- the processor 42 substantially continuously receives load signals from the load sensors 38 , as identified by block 56 .
- the processor 42 therefore, substantially continuously compares the load signals with the load parameters retrieved from the electronic storage unit 44 , as identified at block 60 . If the load signals match the load parameters, the processor 42 returns to block 50 and repeats the process. However, if the load signals do not match to the load parameters, the processor 42 sends a signal to each of the roll translating devices 40 , as illustrated by block 62 .
- the signals actuate the roll translating devices 40 to displace the rolls 26 along axis A.
- the processor 42 returns to block 56 to continue receiving and processing load signals until the load signals match the load parameters. Once the processor 42 determines that the load signals match the load parameters it returns to block 50 to repeat the entire control loop.
- the above-described adjustments based on the load and position signals are performed substantially continuously throughout normal operation of the tube mill 10 .
- This substantially continuous control loop ensures optimum edge alignment of the stock material 18 even when the stock material 18 includes a slight deviation in size or thickness.
- the load and position parameters may include ranges of distances and forces, respectively, representing satisfactory operating conditions.
- the processor 42 determines whether the position and load signals are within the ranges of parameters.
- weld box 20 has been disclosed as including two rolls 26 , a weld box including more or less than two rolls 26 is intended to be within the scope of the present invention.
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Abstract
Description
- The present invention relates to a tube milling and welding system and, more particularly, to a feedback and control system for optimizing weld quality during the operation of a tube milling and welding system.
- Tube milling operations typically include taking stock material from a roll and through a series of operations converting it into a welded tube. The first step of the process includes removing burrs and uneven edges from the stock material. The stock material is then passed through a series of rolls mounted on shafts. The rolls apply a forging pressure to progressively curve the stock material toward the form of a cylinder. Once the material is formed substantially into a cylinder it is welded into a tube. In a typical milling operation, the rate of speed that the stock material travels through the mill and the position of each of the rolls are substantially fixed for a given size stock material. Therefore, any slight deformity in the stock material can decrease weld quality. Hence, timely inspection of each welded seam is critical. Without timely inspection, a tremendous amount of material can be wasted due to improper seam alignment and/or forging pressure.
- Ideally, when cylindrical tubing is formed from stock material on conventional tube milling machines, a weld box joins opposing edges of the stock material at generally the same height. The most common method for inspecting the edge alignment is for an operator to hold a gloved hand on the welded seam. The operator then feels for inconsistencies in the welded seam. This method produces safety and accuracy concerns. Alternatively, an operator cuts samples of the welded tube and inspects sample seams under a microscope. Such inspection can be time consuming, cost prohibitive and due to the random nature of sample testing, ineffective. Yet another method of inspecting weld quality includes utilizing a digital camera to substantially continuously image the welded seam. The images are then presented on a monitor for a technician to inspect. However, as a result of the edge conditioning, tube forming, and welding processes, the welded seam and environment tend to be very dirty. Therefore, the image quality tends to be poor, resulting in an ineffective inspection.
- The present invention will become more fully understood from the detailed description and the accompanying drawings, wherein:
-
FIG. 1 is a perspective view of a tube mill arranged in accordance with the principles of the present invention; -
FIG. 2 is a cross-sectional view taken through line II-II ofFIG. 1 ; -
FIG. 3 is a block diagram of a controller and a welding portion of the tube mill ofFIG. 1 ; and -
FIG. 4 is a flow chart illustrating a method of monitoring and controlling the tube mill ofFIG. 1 . - The following description of the preferred embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
-
FIG. 1 depicts atube mill 10 including a pre-stageportion 12, awelding portion 14, and a sizing andcutting portion 16. A roll ofstock material 18 is introduced to thepre-stage portion 12. Thestock material 18 includes a roll of sheet material such as sheet metal. Thepre-stage portion 12 gradually forms thestock material 18 into asemi-tubular member 18 a of approximately 320 degrees. Thesemi-tubular member 18 a is then introduced to thewelding portion 14 of thetube mill 10. Thewelding portion 14 simultaneously compresses thesemi-tubular member 18 a into a substantially 360 degree cylinder and joins opposite edges thereof to provide acontinuous tube 18 b of generally constant diameter. Thetube 18 b then exits thewelding portion 14 and is introduced to the sizing and cuttingportion 16. The sizing andcutting portion 16 is adapted to cut thetube 18 b into a plurality of links (not shown) having predetermined lengths as may be desired. It should be appreciated that while thepre-stage portion 12 has been disclosed as producing asemi-tubular member 18 a of approximately 320 degrees, apre-stage portion 12 producing a semi-tubular member having an alternative geometry is intended to be within the scope of the present invention. - It is envisioned that the
pre-stage portion 12 includes a seam preparation station, a plurality of forming stations, an edge conditioning station, and a seam guide. The seam preparation station generally removes burrs from the edges of thestock material 18. This may be achieved with grinding wheels, wire brushes, or any other material removing means. The plurality of forming stations form thestock material 18 from a substantially planar member into thesemi-circular member 18 a. This is achieved by forcing thestock material 18 through a series of rollers spaced progressively closer apart. The edge conditioning station de-burrs the edges of thestock material 18 a second time to ensure a controlled finish. The seam guide includes at least one fin for guiding the edges of thestock material 18 toward thewelding portion 14 at a predetermined spacing that is suitable for welding. -
FIG. 2 depicts thewelding portion 14 including aweld box 20, acontroller 22, and aweld apex 24. As described above, thestock material 18 travels through thewelding portion 14 to be welded into atube 18 b. More specifically, as thesemi-circular member 18 a travels through theweld box 20 and beneath theweld apex 24, theweld apex 24 forms a substantially continuous weld bead joining the edges of thesemi-circular member 18 a. In an exemplary embodiment, theweld box 20 is constructed of sheet metal and includessidewalls 20 a having dual walled construction. Thesidewalls 20 a are adapted to substantially continuously carry a coolant flow, such as chilled water. It is envisioned that thesidewalls 20 a may define an elongated serpentine channel between the dual walls for carrying the coolant flow. The coolant flow removes heat from inside theweld box 20 that is generated by forging and welding thestock material 18. It should be appreciated that while only thesidewalls 20 a have been disclosed as being dual walled, aweld box 20 having dual walled top and/or bottom walls is also intended to be within the scope of the present invention. It should further be appreciated that theweld box 20 is envisioned to include an inlet port (not shown) and an outlet port (not shown). The inlet port is for delivering the coolant flow to thesidewalls 20 a and the outlet port is for removing the coolant flow from thesidewalls 20 a, thereby providing a continuous flow. Furthermore, it is envisioned that theweld box 20 could be filled with an inert gas. In an exemplary embodiment, theweld box 20 is filled 98% with argon gas. The argon gas is heavier than oxygen, which comprises the remaining 2% of atmosphere in theweld box 20, and, therefore, serves to prevent impurities such as water, oil, or any other contaminant from obstructing theweld apex 24 during the welding and forming processes. Furthermore, an oxygen sensor (not shown) is employed to substantially continuously monitor the level of oxygen in theweld box 20 and terminate operation of thetube mill 10 if the level rises above 2%. - While the
weld apex 24 forms the weld bead, theweld box 20 positions thestock material 18. Theweld box 20 includes first andsecond rolls 26 rotatably supported onshafts 41. In an exemplary embodiment, therolls 26 andshafts 41 are constructed of a thermally conductive material, such as aluminum or steel. Therolls 26 apply a forging pressure for compressing and guiding thestock material 18 through theweld box 20. The first andsecond rolls 26 include substantially parallel rotational axes, each identified by B, and a common lateral axis A. The lateral axis A is substantially perpendicular to the rotational axes B. The first andsecond rolls 26 each include concave formingsurfaces 28 integrally formed withtop caps 30 and bottom caps 32. In the embodiment illustrated, the formingsurfaces 28 are designed to generally conform to the shape of thetube 18 b. The top and bottom caps 30, 32 include externalcylindrical surfaces rolls 26 may include cylindrical rolls. It should also be appreciated that in the embodiment illustrated, theshafts 41 rotatably supporting therolls 26 are hollow. Similar to thesidewalls 20 a discussed above, thehollow shafts 41 are adapted to carry a coolant flow, such as chilled water. The coolant flow serves to remove heat from therolls 26 generated by forging thestock material 18 during normal operation of thetube mill 10. It is envisioned that thehollow shafts 41 would also include an inlet port (not shown) and an outlet port (not shown) for delivering and removing the coolant flow therefrom. - For each of the first and
second rolls 26, theweld box 20 further includes avertical position sensor 34, ahorizontal position sensor 36, aload sensor 38, and aroll translating device 40. The vertical andhorizontal position sensors controller 22. In an exemplary embodiment, the vertical andhorizontal position sensors vertical position sensors 34 project an optical signal to a top surface of therolls 26. The optical signals deflect off of the top surfaces of therolls 26 and are received by the optical sensors. Similarly, thehorizontal position sensors 36 project an optical signal to the externalcylindrical surfaces 30 a of thetop caps 30 of therolls 26. The optical signals deflect off of the externalcylindrical surfaces 30 a and are received by the optical sensors. The vertical andhorizontal position sensors controller 22. The signals represent a characteristic of the optical signals received. For example, in one embodiment theposition sensors controller 22 then processes these signals to determine the vertical and horizontal positions of therolls 26 relative to theweld box 20, as will be described in more detail below. It should be appreciated that while the vertical andhorizontal position sensors - The
load sensors 38 each include a form of load cell. The load cells are each envisioned to include a linear strain gage load cell, a non-linear strain gage load cell, a piezoelectric load cell, or any other type of electromechanical load detecting device capable of serving the principles of the present invention. In the embodiment illustrated, the load cells each include aload button 39 operably connected to a strain-gage (not shown) disposed in theload sensor 38. Theload sensors 38 also include a biasing member (not shown) such as a spring biasing theload buttons 39 toward therolls 26. Theload buttons 39 are in constant engagement with the externalcylindrical surfaces 32 a of the bottom caps 32 of therolls 26. Therefore, any displacement of therolls 26 along axis A displaces theload buttons 39 and deforms the strain gages disposed in theload sensors 38. This deformation changes the electrical resistance across the strain gages. Theload sensors 38 then send a signal representing this change in electrical resistance to thecontroller 22 for processing, which will be described in more detail below. It should be noted that during normal operating conditions, thestock material 18 being substantially uniform in size and construction, thestock material 18 should apply a substantially uniform force on therolls 26. However, thestock material 18 may include discrepancies in size and construction that alter the force applied to therolls 26. For example, a slightly wider or thicker portion of thestock material 18 may increase the force applied to therolls 26. Alternatively, a slightly narrower or thinner portion of the stock material may decrease the force applied to therolls 26. - Whenever a load discrepancy is identified, the
controller 22 actuates theroll translating devices 40. Theroll translating devices 40 are connected toshafts 41 rotatably supporting therolls 26 about their rotational axes B. Theroll translating devices 40 are operable to translate therolls 26 along their rotational axes B, as well as along the lateral axis A. It is envisioned that each of theroll translating devices 40 may include a single multi-axis electrical motor, two single-axis electrical motors, a hydraulic actuator, or any other device or combination of devices actuable by thecontroller 22 and operable to serve the principles of the present invention. -
FIG. 3 depicts thecontroller 22 including aprocessor 42, anelectronic storage unit 44, and auser interface 46. Theprocessor 42 of thecontroller 22 is in data communication with theroll translating devices 40, thevertical position sensors 34, thehorizontal position sensors 36, and theload sensors 38. Theelectronic storage unit 44 is adapted to store a variety of operational parameters for thetube mill 10 and, more specifically, for theweld box 20. The operational parameters include horizontal roll position parameters, vertical roll position parameters, and load parameters. For example, the horizontal and vertical position parameters are envisioned to include a distance value identifying a distance that therolls 26 are to be positioned from theposition sensors stock material 18 applies on therolls 26 during normal milling operations. Theuser interface 46 includes a display device and an input device. In an exemplary embodiment, the display device includes a video monitor and the input device includes a keypad. Theuser interface 46 is adapted to display the operational parameters and any other relevant information to a technician. Furthermore, theuser interface 46 is adapted to receive operational parameters to be stored in theelectronic storage unit 44. In this manner, a technician may enter operational parameters for a plurality of different tube milling operations into theuser interface 46. Theuser interface 46 then sends these parameters to theprocessor 42, which appropriately stores them in theelectronic storage unit 44. -
FIG. 4 depicts a flow chart illustrating a feedback and control process performed by thecontroller 22. Upon introduction of a specificsize stock material 18 to thetube mill 10, theprocessor 42 receives information from a technician via theuser interface 46. This information identifies thespecific stock material 18 being formed. Theprocessor 42 then retrieves a set of operational parameters from theelectronic storage unit 44 matching thatstock material 18, as identified byblock 48. As stated above, the operational parameters include vertical position parameters, horizontal position parameters, and load parameters. Subsequently, theprocessor 42 receives a horizontal position signal from each of thehorizontal position sensors 36 and a vertical position signal from each of thevertical position sensors 34, as identified byblock 50. Theprocessor 42 then compares the horizontal and vertical position signals to the horizontal and vertical position parameters retrieved from theelectronic storage unit 44, as identified byblock 52. If theprocessor 42 determines that the position signals match the position parameters, the processor proceeds to block 56 and receives load signals from theload sensors 38. Alternatively, if theprocessor 42 determines that any of the position signals do not match their respective position parameters, theprocessor 42 instructs theroll translating devices 40 to adjust the first andsecond rolls 26 in accordance with the difference between the position signals and position parameters, as identified byblock 54. Once therolls 26 are properly positioned, theprocessor 42 proceeds to block 56 and receives load signals from theload sensors 38. - During the forming and welding process, the
processor 42 substantially continuously receives load signals from theload sensors 38, as identified byblock 56. Theprocessor 42, therefore, substantially continuously compares the load signals with the load parameters retrieved from theelectronic storage unit 44, as identified atblock 60. If the load signals match the load parameters, theprocessor 42 returns to block 50 and repeats the process. However, if the load signals do not match to the load parameters, theprocessor 42 sends a signal to each of theroll translating devices 40, as illustrated byblock 62. The signals actuate theroll translating devices 40 to displace therolls 26 along axis A. Then theprocessor 42 returns to block 56 to continue receiving and processing load signals until the load signals match the load parameters. Once theprocessor 42 determines that the load signals match the load parameters it returns to block 50 to repeat the entire control loop. - It should be appreciated that the above-described adjustments based on the load and position signals are performed substantially continuously throughout normal operation of the
tube mill 10. This substantially continuous control loop ensures optimum edge alignment of thestock material 18 even when thestock material 18 includes a slight deviation in size or thickness. It should further be appreciated that in an exemplary embodiment, the load and position parameters may include ranges of distances and forces, respectively, representing satisfactory operating conditions. Thus, theprocessor 42 determines whether the position and load signals are within the ranges of parameters. Furthermore, it should be appreciated that while theweld box 20 has been disclosed as including tworolls 26, a weld box including more or less than tworolls 26 is intended to be within the scope of the present invention. - The description of the invention is merely exemplary in nature and, thus, variations that do not depart from the gist of the invention are intended to be within the scope of the invention. Such variations are not to be regarded as a departure from the spirit and scope of the invention.
Claims (43)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US10/885,494 US20060005598A1 (en) | 2004-07-06 | 2004-07-06 | Weld box auto roll sensing and positioning system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US10/885,494 US20060005598A1 (en) | 2004-07-06 | 2004-07-06 | Weld box auto roll sensing and positioning system |
Publications (1)
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US20060005598A1 true US20060005598A1 (en) | 2006-01-12 |
Family
ID=35539902
Family Applications (1)
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US10/885,494 Abandoned US20060005598A1 (en) | 2004-07-06 | 2004-07-06 | Weld box auto roll sensing and positioning system |
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US (1) | US20060005598A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170037937A1 (en) * | 2014-10-08 | 2017-02-09 | Candy House Inc. | Gear assembly and a door mount mechanism including the same |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3733453A (en) * | 1972-02-18 | 1973-05-15 | Olin Corp | High frequency weld box |
US4109356A (en) * | 1976-12-30 | 1978-08-29 | J. P. Stevens & Co., Inc. | Process for texturing synthetic fibrous material |
US4403130A (en) * | 1980-04-29 | 1983-09-06 | Baker George E | Position detector and machining apparatus including same |
US5245409A (en) * | 1991-11-27 | 1993-09-14 | Arvin Industries, Inc. | Tube seam weld inspection device |
US5923555A (en) * | 1997-06-02 | 1999-07-13 | Framatome Technologies, Inc. | Welding system |
US6051099A (en) * | 1997-10-14 | 2000-04-18 | International Business Machines Corporation | Apparatus for achieving etch rate uniformity |
-
2004
- 2004-07-06 US US10/885,494 patent/US20060005598A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3733453A (en) * | 1972-02-18 | 1973-05-15 | Olin Corp | High frequency weld box |
US4109356A (en) * | 1976-12-30 | 1978-08-29 | J. P. Stevens & Co., Inc. | Process for texturing synthetic fibrous material |
US4403130A (en) * | 1980-04-29 | 1983-09-06 | Baker George E | Position detector and machining apparatus including same |
US5245409A (en) * | 1991-11-27 | 1993-09-14 | Arvin Industries, Inc. | Tube seam weld inspection device |
US5923555A (en) * | 1997-06-02 | 1999-07-13 | Framatome Technologies, Inc. | Welding system |
US6051099A (en) * | 1997-10-14 | 2000-04-18 | International Business Machines Corporation | Apparatus for achieving etch rate uniformity |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170037937A1 (en) * | 2014-10-08 | 2017-02-09 | Candy House Inc. | Gear assembly and a door mount mechanism including the same |
US10746261B2 (en) * | 2014-10-08 | 2020-08-18 | Candy House Inc. | Gear assembly and a door mount mechanism including the same |
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