US20020050674A1 - Workpiece support apparatus - Google Patents
Workpiece support apparatus Download PDFInfo
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- US20020050674A1 US20020050674A1 US09/747,060 US74706000A US2002050674A1 US 20020050674 A1 US20020050674 A1 US 20020050674A1 US 74706000 A US74706000 A US 74706000A US 2002050674 A1 US2002050674 A1 US 2002050674A1
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- United States
- Prior art keywords
- primary
- support columns
- workpiece
- support apparatus
- arms
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
- B25B11/02—Assembly jigs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
- B23K37/0533—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor external pipe alignment clamps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
-
- 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
- Y10T29/53961—Means to assemble or disassemble with work-holder for assembly
Definitions
- the present invention relates to a workpiece support apparatus and, in particular, a workpiece support apparatus suitable for use in welding complex branch structures.
- the piping generally consists of numerous primary or trunk lines having a myriad of secondary or branch lines.
- the secondary lines are fabricated to intersect the primary lines at varying angles and from varying elevations. The fabrication must be precise, or the piping will not line up during on site assembly.
- a workpiece support apparatus which includes an elongate primary body having several height adjustable primary support columns which extend vertically from the primary body.
- One or more arms extending radially from and are pivotally secured to the primary body. The arms pivot about a substantially vertical axis for angular adjustment on a substantially horizontal plane.
- At least two height adjustable secondary support columns extend vertically from each arm.
- a pipe intended to serve as a primary or trunk line is supported on the primary support columns.
- a pipe intended to serve as a secondary or branch line is supported on the secondary support columns.
- the arm is adjusted to the correct angle of intersection of the trunk line with the branch line.
- the heights of both the primary support columns and the secondary support columns are adjusted to ensure that the intersection of the trunk line with the branch line is at the required elevation.
- beneficial results may be obtained through the use of the workpiece support apparatus, as described above, the positions at which support is required will vary to some degree with the configuration of the workpiece. Even more beneficial results may, therefore, be obtained when the some or all of the primary support columns and the secondary support columns are axially movable along the primary body. This enables the support columns to be positioned as required.
- the manner in which the support columns are made to be movable can vary. Beneficial results have been obtained by using tracks and providing each support column with a base that has rollers, as will hereinafter be further described; although other engagements may also be functional.
- the support columns take the form of fluid activated telescopically extendible cylinders provided with fluid through fluid lines.
- this creates a number of problems which have been addressed through series of innovations.
- the fluid lines extending from each of the primary support columns are connected to a rotary fluid manifold.
- fluid lines are wound onto the rotary fluid manifold.
- fluid lines are fed from the rotary fluid manifold.
- Each support column as two fluid lines, an inflow line and an outflow line.
- a plurality of direction altering rollers are used to route the fluid lines along the primary body and each of the arms.
- each of the fluid lines is segregated by means of radially extending dividers positioned on the rotary fluid manifold.
- rotation of the rotary fluid manifold is controlled by a spring loaded recoiler.
- the quality of the final welds of the workpiece is, in part, dependent upon how precisely the workpiece is held by the workpiece support apparatus. Even more beneficial results may, therefore, be obtained when means is provided for levelling each of the primary support columns. Beneficial results have been obtained through the use of a screw levelling adjustment, as will hereinafter be further described, although other forms of levelling adjustment may also be functional. Even more beneficial results may, therefore, be obtained when means are provided for aligning each of the primary support columns axially along the primary body. Beneficial results have been obtained through laser alignment, although other forms of alignment may also be functional.
- each arm be readily movable and be capable of being locked in the preselected position. Movement of the arms is effected by providing each arm with underlying rollers. Once in position, means are provided, in the form of locking pins, for locking the arms in a selected angular position. There is a limit to the amount of weight that rollers can bear. Even more beneficial results may, therefore, be obtained when each of the underlying rollers are spring mounted to a housing.
- the rollers have an extended position extending from the housing and a retracted position retracted within the housing. The rollers are normally in the extended position, however, the rollers assume the retracted position when a load is applied that overcomes the biasing force of the spring mounting.
- each support columns has a top mounting adaptor adapted to receive a workpiece engaging member.
- This enables several alternative workpiece engaging members having differing support characteristics to be used, as will hereafter be further described.
- a “V” shaped workpiece engaging member is most appropriate.
- a table style workpiece engaging member is most appropriate.
- a mounting bar attachment having projecting pins with adjustable pin spacing is most appropriate.
- the workpiece engaging member may be in need of support. In such situations a rigidifying frame can be provided.
- Even more beneficial results may be obtained when each of the support columns has longitudinally extending grooves. These longitudinally extending grooves receive bars of the rigidifying frame to provide lateral stability to the workpiece engaging member when mounted on the top mounting adaptor.
- FIG. 1 is a perspective view of a workpiece support apparatus constructed in accordance with the teachings of the present invention.
- FIG. 2 is a top plan view of the workpiece support apparatus illustrated in FIG. 1.
- FIG. 3 is an end elevation view, in section, of the workpiece support apparatus illustrated in FIG. 1.
- FIG. 4 is a top plan view, in section, of one of the support columns from the workpiece support apparatus illustrated in FIG. 1.
- FIG. 5 is a side elevation view of one of the tracks from the workpiece support apparatus illustrated in FIG. 1.
- FIG. 6 is a side elevation view, in section, of the workpiece support apparatus illustrated in FIG. 1, showing track and roller detail, as well as support column levelling detail.
- FIG. 7 is a perspective view of one of the support columns from the workpiece support apparatus illustrated in FIG. 1, with a table top workpiece engaging member.
- FIG. 8 is a perspective view of one of the support columns from the workpiece support apparatus illustrated in FIG. 1, with a “V” shaped workpiece engaging member.
- FIG. 9 is an end elevation view, in section, of one of the arms from the workpiece support apparatus illustrated in FIG. 1.
- FIG. 10 is a top plan view of one of the arms from the workpiece support apparatus illustrated in FIG. 1.
- FIG. 11 is a side elevation view, in section, of one of the arms from the workpiece support apparatus illustrated in FIG. 1.
- FIG. 12 is a perspective view of one of the secondary support columns the workpiece support apparatus illustrated in FIG. 1.
- FIG. 13 is a perspective view of one of the support columns from the workpiece support apparatus illustrated in FIG. 1, with a mounting bar workpiece engaging member.
- FIG. 14 is a top plan view, in section, of a rotary fluid manifold from the workpiece support apparatus illustrated in FIG. 1.
- FIG. 15 is a first end elevation view, in section, of the rotary fluid manifold from the workpiece support apparatus illustrated in FIG. 1.
- FIG. 16 is a second end elevation view, in section, of the rotary fluid manifold from the workpiece support apparatus illustrated in FIG. 1, showing fluid line connections.
- FIG. 17 is a top plan view of the mounting bar workpiece engaging member from the workpiece support apparatus illustrated in FIG. 13.
- FIG. 18 is a front elevation view of the mounting bar workpiece engaging member from the workpiece support apparatus illustrated in FIG. 13.
- FIG. 19 is a side elevation view, in section, of the mounting bar workpiece engaging member from the workpiece support apparatus illustrated in FIG. 13.
- FIG. 20 is a top plan view, in section, of the mounting bar workpiece engaging member from the workpiece support apparatus illustrated in FIG. 1.
- FIG. 21 is a top plan view of the support column with extension support from the workpiece support apparatus illustrated in FIG. 13.
- FIG. 22 is a side elevation view of the extension support illustrated in FIG. 21.
- FIG. 23 is a top plan view of the workpiece support apparatus illustrated in FIG. 1, configured to accommodate a complex workpiece.
- FIG. 24 is a top pan view, in section, of fluid lines leading to the rotary fluid manifolds of the workpiece support apparatus illustrated in FIG. 1.
- a workpiece support apparatus 10 which includes an elongate channel-form primary body 12 having a first end 14 , a second end 16 , a longitudinal axis 18 , a first sidewall 20 and a second sidewall 22 .
- Tracks 24 extend longitudinally along both first sidewall 20 and second sidewall 22 of primary body 12 .
- tracks 24 include an upper rail 26 and a lower rail 28 .
- each of primary support columns 30 has a base 32 with adjustable rollers 34 which engage tracks 24 of primary body 12 for axial movement along primary body 12 whereby primary support columns 30 are selectively positioned.
- primary support columns 30 are moved by means of adjustable rollers 34 that engage tracks 24 of primary body 12 .
- adjustable rollers 34 have bearings 36 which facilitate the rotation of adjustable rollers 34 while engaged to tracks 24 .
- adjustable rollers 34 are adjustable so that adjustable rollers 34 on one side of base 32 engage with upper rail 26 of corresponding track 24 and so that adjustable rollers 34 on opposing side of base 32 engage with lower rail 28 of corresponding track 24 .
- a screw adjustment 38 is provided on base 32 whereby adjustable rollers 34 can be drawn upward to engage upper rail 26 of track 24 by turning screw adjustment 38 in one direction, or released from engagement with track 24 by turning screw adjustment 38 in a counter direction.
- laser alignment targets 40 are provided on each of primary support columns 30 for aligning primary support columns 30 along longitudinal axis 18 of primary body 12 and ensuring that all are positioned along the same horizontal plane.
- elongate channel-form arms 42 extend radially from and are pivotally secured at pivotal connections 44 to first sidewall 20 and second sidewall 22 of primary body 12 .
- Pivotal connections 44 are mounted on rollers 46 which engage with tracks 24 located on exteriors of first sidewall 20 and second sidewall 22 such that arms 42 may be repositioned longitudinally along primary body 12 .
- each arm 42 pivots about a substantially vertical axis 48 for angular adjustment on a substantially horizontal plane.
- each arm 42 has a first end 50 , a second end 52 , a longitudinal axis 54 , a first sidewall 56 and a second sidewall 58 .
- tracks 60 extend longitudinally along interiors of first sidewall 56 and second sidewall 58 of each of arms 42 .
- tracks 60 include an upper rail 62 and a lower rail 64 .
- each arm 42 also has underlying rollers 66 .
- Each of underlying rollers 66 are spring mounted within a roller housing 68 .
- Rollers 66 have an extended position extending from housing 68 and a retracted position retracted within housing 68 .
- Rollers 66 are normally in the extended position although rollers 66 will assume the retracted position when a load is applied that overcomes the biasing force of spring mounting.
- pivotal connections 44 that are located toward first end 50 of each arm 42 have several apertures 70 .
- arms 42 are locked into a selected angular position by inserting a locking pin 72 into one of apertures 70 .
- a thumbscrew 74 is provided in the event a selected position does not correspond with an aperture 70 .
- each of secondary support columns 76 has a base 78 with adjustable rollers 80 that engage tracks 60 of arms 42 for axial movement along arms 42 such that secondary support columns 76 can be selectively positioned.
- Adjustable rollers 80 are adjusted so that adjustable rollers 80 on one side of base 78 engage with upper rail 62 of corresponding track 60 while adjustable rollers 80 on opposing side of base 78 engage with lower rail 64 of corresponding track 60 .
- a screw adjustment 82 is provided on base 78 whereby adjustable rollers 80 can be drawn upward to engage upper rail 62 of track 60 by turning screw adjustment 82 in one direction and released from engagement with track 60 by turning screw adjustment 82 in a counter direction.
- each of primary support columns 30 has a screw levelling adjustment 84 .
- Screw levelling adjustment 84 includes screws 86 that are inserted through several inwardly protruding screw supports 88 located on opposing sides of base 32 .
- a support plate 90 underlies primary support column 30 and balances on a support post 92 on top of base 32 .
- screws 86 impinge on balancing support plate 90 causing support plate 90 to tilt in a direction and therefore causing primary support column 32 to tilt in the same direction. Screws 86 can be alternatingly adjusted until the desired levelling of primary support column 30 is obtained.
- each of secondary support columns 76 also has a screw levelling adjustment 84 which adjusts the levelling of secondary support columns 76 in the same manner as primary support columns 30 .
- each of primary support columns 30 and each of secondary support columns 76 also have a top mounting adaptor 94 that is adapted to receive a workpiece engaging member 96 .
- Several alternative workpiece engaging members 96 with differing support characteristics are provided for top mounting adaptors 94 .
- Alternative workpiece engaging members include a “V” shaped workpiece engaging member 98 as illustrated in FIG. 8, a table style workpiece engaging member 100 as illustrated in FIG. 7, and a mounting bar attachment 102 as illustrated in FIG. 13.
- mounting bar attachment 102 includes a housing 104 with a rotational screw shaft 106 extending longitudinally through interior of housing 102 .
- a screw shaft support 108 is provided that extends from interior of housing 102 though to the exterior of housing 102 .
- Screw shaft support 108 has a first end 110 and a second end 112 .
- Rotational screw shaft 106 is threaded through first end 110 of screw shaft support 108 while the threaded body 114 of a screw adjustment 116 is threaded through second end 112 of screw shaft support 108 .
- Threaded body 114 of screw shaft adjustment 116 is also threaded through mounts 118 positioned on exterior of housing 104 .
- two movable blocks 120 are mounted on either end of rotational screw shaft 106 such that rotational screw shaft 106 is threaded through a threaded channel 122 in each block 120 .
- Blocks 120 have several pin holes 124 adapted to receive projecting pins 126 . Pin holes 126 may be of varying sizes.
- Blocks 120 can be moved by manually rotating a shaft handle 128 of rotation screw shaft 106 which in turn causes rotational screw shaft 106 to turn. As rotational screw shaft 106 rotates in one direction, blocks 120 move toward each other. Rotation of rotational screw shaft 106 in the other direction causes blocks 120 to move apart from each other. In this manner the spacing between the blocks 120 can be roughly adjusted. Referring to FIG.
- screw adjustment 116 on exterior of housing 104 can be used for fine adjustment of the positioning of blocks 120 .
- shaft support 108 can be moved subtly along threaded body 114 of screw adjustment 116 .
- rotational screw shaft 106 is threadably mounted through shaft support 108 , rotational screw shaft 106 also moves subtly to adjust the positioning of block 120 .
- a rigidifying frame 130 is also provided for additional lateral support for workpiece engaging members 96 .
- each of primary support columns 30 and secondary support columns 76 have longitudinally extending grooves 132 .
- grooves 132 are adapted to receive bars 134 of rigidifying frame 130 to provide lateral stability to workpiece engaging member 96 when mounted on top mounting adaptor 94 .
- Rigidify frame 130 also has bands 136 which encircle and are affixed to bars 134 . The purpose of rigidifying frame 130 is to reduce twisting and ensure that workpiece engaging members 96 are always in an orientation that is perpendicular to the workpiece.
- Support extensions 138 are provided for additional support.
- Support extension 138 has a vertical portion 140 , a horizontal portion 142 and a brace 144 .
- Vertical portion 140 has a first end 146 and a second end 148 .
- Brace 144 extends upward at a 45 degree angle from second end 148 of vertical portion 140 to support horizontal portion 142 .
- An arcuate engagement member 145 that is adapted to fit against a primary support column 30 or a secondary support column 76 is provided at second end 148 of vertical portion 140 .
- a “T” shaped male coupling 150 is provided at first end 146 of vertical portion 140 . Referring to FIG.
- male coupling 150 is adapted to mate with “T” shaped female coupling 152 located on workpiece engaging member 96 .
- male coupling 150 is a male coupling that slides and locks into female coupling 152 , however it will be appreciated that another type of coupling could be used.
- each of primary support columns 30 are fluid activated telescopically extendible cylinders supplied with fluid through fluid lines 154 .
- each of primary support columns 30 has two fluid lines 154 , an inflow line 156 and an outflow line 158 .
- each of secondary support columns 76 also are fluid activated telescopically extendible cylinders supplied with fluid though fluid lines 154 .
- each of secondary support columns 76 also has inflow line 156 and outflow line 158 .
- Fluid lines 154 extend from each of primary support columns 30 and secondary support columns 76 to rotary fluid manifolds 160 positioned inside of rotary manifold housings 162 located at either end of primary body 12 . Fluid lines 154 change in length as the positioning of the first primary support column 30 and secondary support columns 76 changes. Referring to FIGS. 3, 9 and 15 , fluid lines 154 are supported on shelves 164 that are provided along interiors of first sidewall 20 and second sidewall 22 of primary body 12 and first sidewall 56 and second sidewall 58 of arms 42 . Referring to FIG. 14, in order to avoid having fluid lines 154 pinched or damaged a plurality of direction altering rollers 166 are used to route fluid lines 154 along primary body 12 . Referring FIG.
- fluid lines 154 are wound onto rotary fluid manifold 160 .
- fluid lines 154 are fed from rotary fluid manifold 160 .
- rotation of rotary fluid manifold 160 is controlled by a spring loaded recoiler 168 which ensures that slack does not develop in fluid lines 154 which could result in fluid lines becoming pinched or damaged.
- fluid lines 154 are segregated by means of a radially extending dividers 170 positioned on rotary fluid manifold 78 to prevent fluid lines 154 from becoming entangled.
- workpiece support apparatus 10 is used to support a workpiece 172 .
- Workpiece 172 includes a pipe that intended to serve as a primary or trunk line 174 and a pipe which is intended to serves a secondary or branch line 176 .
- primary support columns 30 are required to be selectively positioned along longitudinal axis 18 of primary body 12 so as to assume the best supporting position for trunk line 174 of workpiece 172 .
- primary support columns 30 need to be aligned so that they are straight and level along a horizontal plane. This is of importance, for workpiece 172 will not be straight and level unless each of primary support columns 30 is straight and level.
- laser alignment targets 40 are used in conjunction with a laser pen to ensure that primary support columns 30 axially aligned along primary body 12 . It will be appreciated that other forms of alignment may also be used instead of laser alignment.
- arms 42 are selected and are pivotally secured to primary body 12 .
- additional arms 42 can be added to accommodate further branch lines 176 .
- arms 42 are moved along primary body 12 until arms are positioned at the appropriate spacings to accommodate branch lines 170 .
- each arm 42 must be adjusted to the correct angle of the proposed intersection 178 between trunk line 174 and each branch line 176 .
- thumbscrew 74 may be used. To use thumbscrew 74 , thumbscrew 74 is turned in a first direction so that thumbscrew 57 impinges on underlying arm 42 securing arm 42 in position. Turning thumbscrew 42 in the counter direction releases arm 42 allowing arm 42 to be pivoted to an alternative position. Once arms 42 have been secured at the appropriate angle, secondary support columns 76 are then moved to appropriate positions along longitudinal axis 54 of arms 42 .
- FIG. 1 After primary support columns 30 and secondary support columns 76 have been properly positioned, then an appropriate work piece engaging member 96 for each particular type of workpiece 172 will need to be selected and then mounted on top mounted adapter 94 of each of primary support columns 30 and secondary support columns 76 .
- workpiece 172 is a pipe
- “v” shaped workpiece engaging member 98 would be mounted on top mounting adapted 94 to support the workpiece 172 .
- FIG. 12 depicts “v” shaped workpiece engaging member 98 mounted on top mounting adapter 94 of primary support column 30 that has shorter height than primary support column 30 depicted in FIG. 8.
- a workpiece 172 that is a horizontal flange face would require a table style workpiece engaging member 100 to be mounted on top mounting adapter 94 . While table top style workpiece engaging member 100 is depicted as being triangular, other shapes can also be used. Referring to FIG. 13, for workpiece 172 that is a vertical flange face, a mounting bar attachment 102 would be most suitable. Referring to FIG. 19, mounting bar attachment 102 may require further adjustment of the spacing of blocks 120 so that projecting pins 126 can be accurately inserted through both pinholes 124 of blocks 120 and pinholes 124 of workpiece 172 to secure workpiece 172 to mounting bar attachment 102 .
- the next step involves adjusting the heights of both primary support columns 30 and secondary support columns 76 to ensure that the proposed intersections 172 of trunk lines 174 with branch lines 176 are at the required elevation.
- fluid activated telescopically extendible cylinders are activated with fluid through fluid lines 154 .
- trunk line 174 and branch line 176 can be placed on workpiece support apparatus 10 .
- each of primary support columns 30 can be levelled through use of screw levelling adjustment 84 . Once level, primary support columns 30 will generally remain level unless the equipment is moved or sustains an impact.
- FIG. 9 once secondary support columns 76 have been adjusted to the proper height, the same means can be used to level secondary support columns 76 .
- the levelling means in FIGS. 3 and 9 is illustrated as being screw levelling adjustment 84 , it will be appreciated that other forms of levelling adjustment may also be functional.
- support extension 138 can be used.
- Support extension 138 can be coupled to either primary support column 30 or secondary support column 76 .
- trunk lines 174 and branch lines 176 are accurately aligned
- workpiece 172 is then able to be held securely while welding to join branch line 176 to trunk line 174 is completed.
- workpiece support apparatus 10 could be equipped with more sophisticated computer controls.
- Computer controls would set the alignment of workpiece support apparatus 10 directly from a computer assisted drawing program. This would speed up the set up time for the equipment and eliminate the possibility of human error. It will also be understood that as the applications for workpiece support apparatus 10 is expanded, further workpiece engaging members 96 may have to be developed to ensure that workpieces having unusual shapes are properly supported.
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Abstract
A workpiece support apparatus includes an elongate primary body having several height adjustable primary support columns which extend vertically from the primary body. One or more arms extend radially from and are pivotally secured to the primary body. The arms pivot about a substantially vertical axis for angular adjustment on a substantially horizontal plane. At least two height adjustable secondary support columns extend vertically from each arm. The workpiece support apparatus is particular adapted for use by welders when welding pipe to form complex branch structures.
Description
- The present invention relates to a workpiece support apparatus and, in particular, a workpiece support apparatus suitable for use in welding complex branch structures.
- One example of an application in which complex branch structures are welded is in the fabrication of piping for connecting various processing units in a processing plant. The piping generally consists of numerous primary or trunk lines having a myriad of secondary or branch lines. The secondary lines are fabricated to intersect the primary lines at varying angles and from varying elevations. The fabrication must be precise, or the piping will not line up during on site assembly.
- What is required is a workpiece support assembly which can be used to support a workpiece during welding and assembly of such complex branch structure.
- According to the present invention there is provided a workpiece support apparatus which includes an elongate primary body having several height adjustable primary support columns which extend vertically from the primary body. One or more arms extending radially from and are pivotally secured to the primary body. The arms pivot about a substantially vertical axis for angular adjustment on a substantially horizontal plane. At least two height adjustable secondary support columns extend vertically from each arm.
- With the workpiece support apparatus, as described above, a pipe intended to serve as a primary or trunk line is supported on the primary support columns. A pipe intended to serve as a secondary or branch line is supported on the secondary support columns. The arm is adjusted to the correct angle of intersection of the trunk line with the branch line. The heights of both the primary support columns and the secondary support columns are adjusted to ensure that the intersection of the trunk line with the branch line is at the required elevation. With the workpiece support apparatus at the proper setting, the workpiece is held securely while the workpiece is welded to joint the branch line to the trunk line. As the complexity of the workpiece is increased, additional arms can be added to accommodate further branches.
- Although beneficial results may be obtained through the use of the workpiece support apparatus, as described above, the positions at which support is required will vary to some degree with the configuration of the workpiece. Even more beneficial results may, therefore, be obtained when the some or all of the primary support columns and the secondary support columns are axially movable along the primary body. This enables the support columns to be positioned as required. The manner in which the support columns are made to be movable can vary. Beneficial results have been obtained by using tracks and providing each support column with a base that has rollers, as will hereinafter be further described; although other engagements may also be functional.
- In order to avoid the need for manual adjustment, it is preferred that the support columns take the form of fluid activated telescopically extendible cylinders provided with fluid through fluid lines. In view of the number of support columns involved this creates a number of problems which have been addressed through series of innovations. In order to address the problem of supplying fluid to fluid lines which must be changed in length as the positioning of the support posts changes the fluid lines extending from each of the primary support columns are connected to a rotary fluid manifold. Upon rotation of the rotary fluid manifold in a first direction fluid lines are wound onto the rotary fluid manifold. Upon rotation of the rotary fluid manifold in a second direction fluid lines are fed from the rotary fluid manifold. Each support column as two fluid lines, an inflow line and an outflow line. In order to avoid having the fluid lines pinched or damaged, a plurality of direction altering rollers are used to route the fluid lines along the primary body and each of the arms. In order to avoid entanglement of the fluid lines, each of the fluid lines is segregated by means of radially extending dividers positioned on the rotary fluid manifold. In order to ensure that slack does not develop in the fluid lines which could result in them becoming pinched, rotation of the rotary fluid manifold is controlled by a spring loaded recoiler.
- The quality of the final welds of the workpiece is, in part, dependent upon how precisely the workpiece is held by the workpiece support apparatus. Even more beneficial results may, therefore, be obtained when means is provided for levelling each of the primary support columns. Beneficial results have been obtained through the use of a screw levelling adjustment, as will hereinafter be further described, although other forms of levelling adjustment may also be functional. Even more beneficial results may, therefore, be obtained when means are provided for aligning each of the primary support columns axially along the primary body. Beneficial results have been obtained through laser alignment, although other forms of alignment may also be functional.
- It is preferred that each arm be readily movable and be capable of being locked in the preselected position. Movement of the arms is effected by providing each arm with underlying rollers. Once in position, means are provided, in the form of locking pins, for locking the arms in a selected angular position. There is a limit to the amount of weight that rollers can bear. Even more beneficial results may, therefore, be obtained when each of the underlying rollers are spring mounted to a housing. The rollers have an extended position extending from the housing and a retracted position retracted within the housing. The rollers are normally in the extended position, however, the rollers assume the retracted position when a load is applied that overcomes the biasing force of the spring mounting.
- Although beneficial results may be obtained through the use of the workpiece support apparatus, as described above, even more beneficial results may be obtained when each support columns has a top mounting adaptor adapted to receive a workpiece engaging member. This enables several alternative workpiece engaging members having differing support characteristics to be used, as will hereafter be further described. For example, with a pipe a “V” shaped workpiece engaging member is most appropriate. With a horizontal flange face, a table style workpiece engaging member is most appropriate. With a vertical flange face, a mounting bar attachment having projecting pins with adjustable pin spacing is most appropriate. In some situations, the workpiece engaging member may be in need of support. In such situations a rigidifying frame can be provided. Even more beneficial results may be obtained when each of the support columns has longitudinally extending grooves. These longitudinally extending grooves receive bars of the rigidifying frame to provide lateral stability to the workpiece engaging member when mounted on the top mounting adaptor.
- These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, the drawings are for the purpose of illustration only and are not intended to in any way limit the scope of the invention to the particular embodiment or embodiments shown, wherein:
- FIG. 1 is a perspective view of a workpiece support apparatus constructed in accordance with the teachings of the present invention.
- FIG. 2 is a top plan view of the workpiece support apparatus illustrated in FIG. 1.
- FIG. 3 is an end elevation view, in section, of the workpiece support apparatus illustrated in FIG. 1.
- FIG. 4 is a top plan view, in section, of one of the support columns from the workpiece support apparatus illustrated in FIG. 1.
- FIG. 5 is a side elevation view of one of the tracks from the workpiece support apparatus illustrated in FIG. 1.
- FIG. 6 is a side elevation view, in section, of the workpiece support apparatus illustrated in FIG. 1, showing track and roller detail, as well as support column levelling detail.
- FIG. 7 is a perspective view of one of the support columns from the workpiece support apparatus illustrated in FIG. 1, with a table top workpiece engaging member.
- FIG. 8 is a perspective view of one of the support columns from the workpiece support apparatus illustrated in FIG. 1, with a “V” shaped workpiece engaging member.
- FIG. 9 is an end elevation view, in section, of one of the arms from the workpiece support apparatus illustrated in FIG. 1.
- FIG. 10 is a top plan view of one of the arms from the workpiece support apparatus illustrated in FIG. 1.
- FIG. 11 is a side elevation view, in section, of one of the arms from the workpiece support apparatus illustrated in FIG. 1.
- FIG. 12 is a perspective view of one of the secondary support columns the workpiece support apparatus illustrated in FIG. 1.
- FIG. 13 is a perspective view of one of the support columns from the workpiece support apparatus illustrated in FIG. 1, with a mounting bar workpiece engaging member.
- FIG. 14 is a top plan view, in section, of a rotary fluid manifold from the workpiece support apparatus illustrated in FIG. 1.
- FIG. 15 is a first end elevation view, in section, of the rotary fluid manifold from the workpiece support apparatus illustrated in FIG. 1.
- FIG. 16 is a second end elevation view, in section, of the rotary fluid manifold from the workpiece support apparatus illustrated in FIG. 1, showing fluid line connections.
- FIG. 17 is a top plan view of the mounting bar workpiece engaging member from the workpiece support apparatus illustrated in FIG. 13.
- FIG. 18 is a front elevation view of the mounting bar workpiece engaging member from the workpiece support apparatus illustrated in FIG. 13.
- FIG. 19 is a side elevation view, in section, of the mounting bar workpiece engaging member from the workpiece support apparatus illustrated in FIG. 13.
- FIG. 20 is a top plan view, in section, of the mounting bar workpiece engaging member from the workpiece support apparatus illustrated in FIG. 1.
- FIG. 21 is a top plan view of the support column with extension support from the workpiece support apparatus illustrated in FIG. 13.
- FIG. 22 is a side elevation view of the extension support illustrated in FIG. 21.
- FIG. 23 is a top plan view of the workpiece support apparatus illustrated in FIG. 1, configured to accommodate a complex workpiece.
- FIG. 24 is a top pan view, in section, of fluid lines leading to the rotary fluid manifolds of the workpiece support apparatus illustrated in FIG. 1.
- The preferred embodiment, a workpiece support apparatus generally identified by
reference numeral 10, will now be described with reference to FIGS. 1 through 24. - Structure and Relationship of Parts:
- Referring to FIG. 1, there is provided a
workpiece support apparatus 10 which includes an elongate channel-formprimary body 12 having afirst end 14, asecond end 16, alongitudinal axis 18, afirst sidewall 20 and asecond sidewall 22.Tracks 24 extend longitudinally along bothfirst sidewall 20 andsecond sidewall 22 ofprimary body 12. Referring to FIG. 3, tracks 24 include anupper rail 26 and alower rail 28. - Referring to FIG. 1, several height adjustable
primary support columns 30 extend vertically fromprimary body 12. Referring to FIG. 3, each ofprimary support columns 30 has a base 32 withadjustable rollers 34 which engage tracks 24 ofprimary body 12 for axial movement alongprimary body 12 wherebyprimary support columns 30 are selectively positioned. Referring to FIGS. 4 and 5,primary support columns 30 are moved by means ofadjustable rollers 34 that engage tracks 24 ofprimary body 12. Referring to FIG. 5,adjustable rollers 34 have bearings 36 which facilitate the rotation ofadjustable rollers 34 while engaged totracks 24. Referring to FIGS. 3 and 6,adjustable rollers 34 are adjustable so thatadjustable rollers 34 on one side ofbase 32 engage withupper rail 26 of correspondingtrack 24 and so thatadjustable rollers 34 on opposing side ofbase 32 engage withlower rail 28 of correspondingtrack 24. To adjustadjustable rollers 34, ascrew adjustment 38 is provided onbase 32 wherebyadjustable rollers 34 can be drawn upward to engageupper rail 26 oftrack 24 by turningscrew adjustment 38 in one direction, or released from engagement withtrack 24 by turningscrew adjustment 38 in a counter direction. - Referring to FIG. 8, laser alignment targets40 are provided on each of
primary support columns 30 for aligningprimary support columns 30 alonglongitudinal axis 18 ofprimary body 12 and ensuring that all are positioned along the same horizontal plane. - Referring to FIG. 1, elongate channel-
form arms 42 extend radially from and are pivotally secured atpivotal connections 44 tofirst sidewall 20 andsecond sidewall 22 ofprimary body 12.Pivotal connections 44 are mounted onrollers 46 which engage withtracks 24 located on exteriors offirst sidewall 20 andsecond sidewall 22 such thatarms 42 may be repositioned longitudinally alongprimary body 12. Referring to FIG. 11, eacharm 42 pivots about a substantiallyvertical axis 48 for angular adjustment on a substantially horizontal plane. Referring to FIG. 10, eacharm 42 has afirst end 50, asecond end 52, alongitudinal axis 54, afirst sidewall 56 and asecond sidewall 58. Referring to FIG. 11, tracks 60 extend longitudinally along interiors offirst sidewall 56 andsecond sidewall 58 of each ofarms 42. Referring to FIG. 9, tracks 60 include anupper rail 62 and alower rail 64. - Referring to FIGS. 9 and 11, each
arm 42 also hasunderlying rollers 66. Each ofunderlying rollers 66 are spring mounted within aroller housing 68.Rollers 66 have an extended position extending fromhousing 68 and a retracted position retracted withinhousing 68.Rollers 66 are normally in the extended position althoughrollers 66 will assume the retracted position when a load is applied that overcomes the biasing force of spring mounting. - Referring to FIG. 10,
pivotal connections 44 that are located towardfirst end 50 of eacharm 42 haveseveral apertures 70. Referring to FIG. 11,arms 42 are locked into a selected angular position by inserting a lockingpin 72 into one ofapertures 70. Athumbscrew 74 is provided in the event a selected position does not correspond with anaperture 70. - Height adjustable
secondary support columns 76 extend vertically from eacharm 42. Referring to FIG. 9, each ofsecondary support columns 76 has a base 78 withadjustable rollers 80 that engage tracks 60 ofarms 42 for axial movement alongarms 42 such thatsecondary support columns 76 can be selectively positioned. -
Adjustable rollers 80 are adjusted so thatadjustable rollers 80 on one side ofbase 78 engage withupper rail 62 of correspondingtrack 60 whileadjustable rollers 80 on opposing side ofbase 78 engage withlower rail 64 of correspondingtrack 60. To adjustadjustable rollers 80, ascrew adjustment 82 is provided onbase 78 wherebyadjustable rollers 80 can be drawn upward to engageupper rail 62 oftrack 60 by turningscrew adjustment 82 in one direction and released from engagement withtrack 60 by turningscrew adjustment 82 in a counter direction. - Referring to FIG. 3, each of
primary support columns 30 has ascrew levelling adjustment 84. Screw levellingadjustment 84 includesscrews 86 that are inserted through several inwardly protruding screw supports 88 located on opposing sides ofbase 32. Asupport plate 90 underliesprimary support column 30 and balances on asupport post 92 on top ofbase 32. When screws 86 are turned,screws 86 impinge on balancingsupport plate 90 causingsupport plate 90 to tilt in a direction and therefore causingprimary support column 32 to tilt in the same direction.Screws 86 can be alternatingly adjusted until the desired levelling ofprimary support column 30 is obtained. Referring to FIG. 9, each ofsecondary support columns 76 also has ascrew levelling adjustment 84 which adjusts the levelling ofsecondary support columns 76 in the same manner asprimary support columns 30. - Referring to FIG. 1, each of
primary support columns 30 and each ofsecondary support columns 76 also have a top mountingadaptor 94 that is adapted to receive aworkpiece engaging member 96. Several alternativeworkpiece engaging members 96 with differing support characteristics are provided for top mountingadaptors 94. Alternative workpiece engaging members include a “V” shapedworkpiece engaging member 98 as illustrated in FIG. 8, a table styleworkpiece engaging member 100 as illustrated in FIG. 7, and a mountingbar attachment 102 as illustrated in FIG. 13. - Referring to FIG. 13, mounting
bar attachment 102 includes ahousing 104 with arotational screw shaft 106 extending longitudinally through interior ofhousing 102. Referring to FIG. 20, ascrew shaft support 108 is provided that extends from interior ofhousing 102 though to the exterior ofhousing 102.Screw shaft support 108 has afirst end 110 and asecond end 112.Rotational screw shaft 106 is threaded throughfirst end 110 ofscrew shaft support 108 while the threadedbody 114 of ascrew adjustment 116 is threaded throughsecond end 112 ofscrew shaft support 108. Threadedbody 114 ofscrew shaft adjustment 116 is also threaded throughmounts 118 positioned on exterior ofhousing 104. - Referring to FIG. 18, two
movable blocks 120 are mounted on either end ofrotational screw shaft 106 such thatrotational screw shaft 106 is threaded through a threadedchannel 122 in eachblock 120.Blocks 120 haveseveral pin holes 124 adapted to receive projectingpins 126. Pin holes 126 may be of varying sizes.Blocks 120 can be moved by manually rotating ashaft handle 128 ofrotation screw shaft 106 which in turn causesrotational screw shaft 106 to turn. Asrotational screw shaft 106 rotates in one direction, blocks 120 move toward each other. Rotation ofrotational screw shaft 106 in the other direction causesblocks 120 to move apart from each other. In this manner the spacing between theblocks 120 can be roughly adjusted. Referring to FIG. 20, if further fine adjustment is required,screw adjustment 116 on exterior ofhousing 104 can be used for fine adjustment of the positioning ofblocks 120. By rotatingscrew adjustment 116,shaft support 108 can be moved subtly along threadedbody 114 ofscrew adjustment 116. Becauserotational screw shaft 106 is threadably mounted throughshaft support 108,rotational screw shaft 106 also moves subtly to adjust the positioning ofblock 120. - Referring to FIG. 13, a
rigidifying frame 130 is also provided for additional lateral support forworkpiece engaging members 96. Referring to FIG. 8, each ofprimary support columns 30 andsecondary support columns 76 have longitudinally extendinggrooves 132. Referring to FIG. 13,grooves 132 are adapted to receivebars 134 ofrigidifying frame 130 to provide lateral stability toworkpiece engaging member 96 when mounted on top mountingadaptor 94.Rigidify frame 130 also hasbands 136 which encircle and are affixed tobars 134. The purpose ofrigidifying frame 130 is to reduce twisting and ensure thatworkpiece engaging members 96 are always in an orientation that is perpendicular to the workpiece. - Referring to FIG. 22,
support extensions 138 are provided for additional support.Support extension 138 has avertical portion 140, ahorizontal portion 142 and abrace 144.Vertical portion 140 has afirst end 146 and asecond end 148.Brace 144 extends upward at a 45 degree angle fromsecond end 148 ofvertical portion 140 to supporthorizontal portion 142. Anarcuate engagement member 145 that is adapted to fit against aprimary support column 30 or asecondary support column 76 is provided atsecond end 148 ofvertical portion 140. A “T” shapedmale coupling 150 is provided atfirst end 146 ofvertical portion 140. Referring to FIG. 21,male coupling 150 is adapted to mate with “T” shapedfemale coupling 152 located onworkpiece engaging member 96. In the illustrated embodiment,male coupling 150 is a male coupling that slides and locks intofemale coupling 152, however it will be appreciated that another type of coupling could be used. - Referring to FIG. 3, each of
primary support columns 30 are fluid activated telescopically extendible cylinders supplied with fluid throughfluid lines 154. Referring to FIGS. 8 and 24, each ofprimary support columns 30 has twofluid lines 154, aninflow line 156 and anoutflow line 158. Referring to FIG. 9, each ofsecondary support columns 76 also are fluid activated telescopically extendible cylinders supplied with fluid though fluid lines 154. Referring to FIG. 24, each ofsecondary support columns 76 also hasinflow line 156 andoutflow line 158.Fluid lines 154 extend from each ofprimary support columns 30 andsecondary support columns 76 torotary fluid manifolds 160 positioned inside of rotarymanifold housings 162 located at either end ofprimary body 12.Fluid lines 154 change in length as the positioning of the firstprimary support column 30 andsecondary support columns 76 changes. Referring to FIGS. 3, 9 and 15,fluid lines 154 are supported onshelves 164 that are provided along interiors offirst sidewall 20 andsecond sidewall 22 ofprimary body 12 andfirst sidewall 56 andsecond sidewall 58 ofarms 42. Referring to FIG. 14, in order to avoid havingfluid lines 154 pinched or damaged a plurality ofdirection altering rollers 166 are used to routefluid lines 154 alongprimary body 12. Referring FIG. 15, upon rotation ofrotary fluid manifold 160 in a firstdirection fluid lines 154 are wound ontorotary fluid manifold 160. Referring to FIG. 16, upon rotation ofrotary fluid manifold 160 in a seconddirection fluid lines 154 are fed fromrotary fluid manifold 160. Referring to FIG. 15, rotation ofrotary fluid manifold 160 is controlled by a spring loadedrecoiler 168 which ensures that slack does not develop influid lines 154 which could result in fluid lines becoming pinched or damaged. Referring to FIG. 14,fluid lines 154 are segregated by means of aradially extending dividers 170 positioned onrotary fluid manifold 78 to preventfluid lines 154 from becoming entangled. - Operation:
- The use and operation of
workpiece support apparatus 10 will now be described with reference to FIGS. 1 through 24. Referring to FIG. 1 and 23,workpiece support apparatus 10, as described above, is used to support aworkpiece 172.Workpiece 172 includes a pipe that intended to serve as a primary ortrunk line 174 and a pipe which is intended to serves a secondary orbranch line 176. - In preparing
workpiece support apparatus 10 to support aworkpiece 172,primary support columns 30 are required to be selectively positioned alonglongitudinal axis 18 ofprimary body 12 so as to assume the best supporting position fortrunk line 174 ofworkpiece 172. Referring to FIGS. 8 and 12, after positioning,primary support columns 30 need to be aligned so that they are straight and level along a horizontal plane. This is of importance, forworkpiece 172 will not be straight and level unless each ofprimary support columns 30 is straight and level. To facilitate accurate alignment, laser alignment targets 40 are used in conjunction with a laser pen to ensure thatprimary support columns 30 axially aligned alongprimary body 12. It will be appreciated that other forms of alignment may also be used instead of laser alignment. - Referring to FIG. 1, next the appropriate number of
arms 42 required to supportbranch lines 176 are selected and are pivotally secured toprimary body 12. As the complexity ofworkpiece 172 is increased,additional arms 42 can be added to accommodatefurther branch lines 176. Referring to FIG. 1,arms 42 are moved alongprimary body 12 until arms are positioned at the appropriate spacings to accommodatebranch lines 170. - Referring to FIG. 2, after
arms 42 are positioned alongprimary body 12, then eacharm 42 must be adjusted to the correct angle of the proposedintersection 178 betweentrunk line 174 and eachbranch line 176. - Referring FIG. 11, once the correct angle for each
arm 42 is found,arm 42 is locked into the preselected position by inserting lockingpin 72 into one ofapertures 70 onpivotal connection 44. The positions at which support is required will vary to some degree with the configuration ofworkpiece 172. In the event thatarm 42 is positioned at an angle where noapertures 70 are available to receive lockingpin 72,thumbscrew 74 may be used. To usethumbscrew 74,thumbscrew 74 is turned in a first direction so that thumbscrew 57 impinges onunderlying arm 42 securingarm 42 in position. Turningthumbscrew 42 in the counter direction releasesarm 42 allowingarm 42 to be pivoted to an alternative position. Oncearms 42 have been secured at the appropriate angle,secondary support columns 76 are then moved to appropriate positions alonglongitudinal axis 54 ofarms 42. - Referring to FIG. 1, after
primary support columns 30 andsecondary support columns 76 have been properly positioned, then an appropriate workpiece engaging member 96 for each particular type ofworkpiece 172 will need to be selected and then mounted on topmounted adapter 94 of each ofprimary support columns 30 andsecondary support columns 76. Referring to FIGS. 8 and 12, if for example,workpiece 172 is a pipe, then “v” shapedworkpiece engaging member 98 would be mounted on top mounting adapted 94 to support theworkpiece 172. The difference between FIG. 8 and FIG. 12 is that FIG. 12 depicts “v” shapedworkpiece engaging member 98 mounted on top mountingadapter 94 ofprimary support column 30 that has shorter height thanprimary support column 30 depicted in FIG. 8. Referring to FIG. 7, aworkpiece 172 that is a horizontal flange face would require a table styleworkpiece engaging member 100 to be mounted on top mountingadapter 94. While table top styleworkpiece engaging member 100 is depicted as being triangular, other shapes can also be used. Referring to FIG. 13, forworkpiece 172 that is a vertical flange face, a mountingbar attachment 102 would be most suitable. Referring to FIG. 19, mountingbar attachment 102 may require further adjustment of the spacing ofblocks 120 so that projectingpins 126 can be accurately inserted through bothpinholes 124 ofblocks 120 andpinholes 124 ofworkpiece 172 to secureworkpiece 172 to mountingbar attachment 102. - Referring to FIG. 1, the next step involves adjusting the heights of both
primary support columns 30 andsecondary support columns 76 to ensure that the proposedintersections 172 oftrunk lines 174 withbranch lines 176 are at the required elevation. Referring to FIGS. 3 and 9, in order to adjust the height ofprimary support columns 30 andsecondary support columns 76, fluid activated telescopically extendible cylinders are activated with fluid throughfluid lines 154. - Referring to FIG. 1, once
primary support columns 30 have been adjusted to the appropriate position and height,trunk line 174 andbranch line 176 can be placed onworkpiece support apparatus 10. To ensure that eachbranch line 176 is properly aligned withtrunk line 174 further adjustment may be required. Referring to FIG. 3, each ofprimary support columns 30 can be levelled through use ofscrew levelling adjustment 84. Once level,primary support columns 30 will generally remain level unless the equipment is moved or sustains an impact. Referring to FIG. 9, oncesecondary support columns 76 have been adjusted to the proper height, the same means can be used to levelsecondary support columns 76. Although the levelling means in FIGS. 3 and 9 is illustrated as beingscrew levelling adjustment 84, it will be appreciated that other forms of levelling adjustment may also be functional. - Referring to FIG. 1, if further support is required to support
workpiece 172,support extension 138 can be used.Support extension 138 can be coupled to eitherprimary support column 30 orsecondary support column 76. - With
workpiece support apparatus 10 at the proper settings and positions so thattrunk lines 174 andbranch lines 176 are accurately aligned,workpiece 172 is then able to be held securely while welding to joinbranch line 176 totrunk line 174 is completed. - Once the teachings of the present invention are understood, it will be apparent to one skilled in the art that workpiece
support apparatus 10 could be equipped with more sophisticated computer controls. Computer controls would set the alignment ofworkpiece support apparatus 10 directly from a computer assisted drawing program. This would speed up the set up time for the equipment and eliminate the possibility of human error. It will also be understood that as the applications forworkpiece support apparatus 10 is expanded, furtherworkpiece engaging members 96 may have to be developed to ensure that workpieces having unusual shapes are properly supported. - In this patent document, the word “comprising” is used in its non-limiting sense to mean that items following the word are included, but items not specifically mentioned are not excluded. A reference to an element by the indefinite article “a” does not exclude the possibility that more than one of the element is present, unless the context clearly requires that there be one and only one of the elements.
- It will be apparent to one skilled in the art that modifications may be made to the illustrated embodiment without departing from the spirit and scope of the invention as hereinafter defined in the Claims.
Claims (38)
1. A workpiece support apparatus, comprising:
an elongate primary body;
several height adjustable primary support columns extending vertically from the primary body;
at least one arm extending radially from and being pivotally secured to the primary body, the at least one arm pivoting about a substantially vertical axis for angular adjustment on a substantially horizontal plane; and
at least two height adjustable secondary support columns extending vertically from the at least one arm.
2. The workpiece support apparatus as defined in claim 1 , wherein some of the primary support columns are axially movable along the primary body.
3. The workpiece support apparatus as defined in claim 1 , wherein at least one of the secondary support columns is axially movable along the arm.
4. The workpiece support apparatus as defined in claim 2 , wherein the primary body has a longitudinally extending track, and each of the primary support columns has a base with means for engaging the track.
5. The workpiece support apparatus as defined in claim 1 , wherein the primary support columns are fluid activated telescopically extendible cylinders provided with fluid through fluid lines.
6. The workpiece support apparatus as defined in claim 5 , wherein the fluid extend from each of the primary support columns to a rotary fluid manifold, upon rotation of the rotary fluid manifold in a first direction fluid lines are wound onto the rotary fluid manifold, upon rotation of the rotary fluid manifold in a second direction fluid lines are fed from the rotary fluid manifold.
7. The workpiece support apparatus as defined in claim 5 , wherein a plurality of direction altering rollers are used to route the fluid lines along the primary body.
8. The workpiece support apparatus as defined in claim 6 , wherein each of the fluid lines is segregated by means of radially extending dividers positioned on the rotary fluid manifold.
9. The workpiece support apparatus as defined in claim 6 , wherein rotation of the rotary fluid manifold is controlled by a spring loaded recoiler.
10. The workpiece support apparatus as defined in claim 1 , wherein means is provided for levelling each of the primary support columns.
11. The workpiece support apparatus as defined in claim 1 , wherein alignment means are provided for aligning each of the primary support columns axially along the primary body.
12. The workpiece support apparatus as defined in claim 1 , wherein the at least one arm has underlying rollers.
13. The workpiece support apparatus as defined in claim 12 , wherein each of the underlying rollers are spring mounted to a housing, the rollers having an extended position extending from the housing and a retracted position retracted within the housing, the rollers normally being in the extended position, the rollers assuming the retracted position when a load is applied that overcomes the biasing force of the spring mounting.
14. The workpiece support apparatus as defined in claim 1 , wherein means are provided for locking the arms in a selected angular position.
15. The workpiece support apparatus as defined in claim 1 , wherein each of the primary support columns has a top mounting adaptor adapted to receive a workpiece engaging member.
16. The workpiece support apparatus as defined in claim 15 , wherein a rigidifying frame is provided and each of the primary support columns has longitudinally extending grooves which receives bars of the rigidifying frame to provide lateral stability to the workpiece engaging member when mounted on the top mounting adaptor.
17. The workpiece support apparatus as defined in claim 15 , wherein several alternative workpiece engaging members having differing support characteristics are provided for the top mounting adaptors.
18. A workpiece support apparatus, comprising:
an elongate primary body having a longitudinal axis;
several height adjustable primary support columns extending vertically from the primary body, each of the primary support columns being selectively positionable along the longitudinal axis of the primary body;
arms extending radially from and being pivotally secured to the primary body, each of the arms pivoting about a substantially vertical axis for angular adjustment on a substantially horizontal plane, each of the arms having a longitudinal axis; and
height adjustable secondary support columns extending vertically from each arm, the secondary support columns being selectively positionable along the longitudinal axis of each of the arms.
19. A workpiece support apparatus, comprising:
an elongate channel-form primary body having a first end, a second end, a longitudinal axis, a first sidewall and a second sidewall;
tracks extending longitudinally along each of first sidewall and the second sidewall of the primary body;
several height adjustable primary support columns extending vertically from the primary body, each of the primary support columns having a base with rollers that engage the tracks of the primary body for axial movement along the primary body whereby the primary support columns are selectively positioned;
elongate channel-form arms extending radially from and being pivotally secured to each of the first sidewall and the second sidewall of the primary body, each of the arms pivoting about a substantially vertical axis for angular adjustment on a substantially horizontal plane, each of the arms having a first end, a second end, a longitudinal axis, a first sidewall and a second sidewall;
tracks extending longitudinally along the first sidewall and the second sidewall of each of the arms;
height adjustable secondary support columns extending vertically from each arm, each of the secondary support columns having a base with rollers that engage the tracks of the arms for axial movement along the arms whereby the secondary support columns are selectively positioned.
20. The workpiece support apparatus as defined in claim 19 , wherein means is provided for levelling each of the primary support columns and each of the secondary support columns.
21. The workpiece support apparatus as defined in claim 19 , wherein each of the primary support columns and each of the secondary support columns are fluid activated telescopically extendible cylinders supplied with fluid through fluid lines.
22. The workpiece support apparatus as defined in claim 19 , wherein alignment means are provided for aligning each of the primary support columns along the longitudinal axis of the primary body.
23. The workpiece support apparatus as defined in claim 19 , wherein each of the arms has underlying rollers.
24. The workpiece support apparatus as defined in claim 23 , wherein each of the underlying rollers are spring mounted to a housing, the rollers having an extended position extending from the housing and a retracted position retracted within the housing, the rollers normally being in the extended position, the rollers assuming the retracted position when a load is applied that overcomes the biasing force of the spring mounting.
25. The workpiece support apparatus as defined in claim 19 , wherein means are provided for locking the arms in a selected angular position.
26. The workpiece support apparatus as defined in claim 21 , wherein the fluid lines extend from each of the primary support columns to a rotary fluid manifold, upon rotation of the rotary fluid manifold in a first direction fluid lines are wound onto the rotary fluid manifold, upon rotation of the rotary fluid manifold in a second direction fluid lines are fed from the rotary fluid manifold.
27. The workpiece support apparatus as defined in claim 21 , wherein a plurality of direction altering rollers are used to route the fluid lines along the primary body.
28. The workpiece support apparatus as defined in claim 26 , wherein each of the fluid lines is segregated by means of a radially extending divider positioned on the rotary fluid manifold.
29. The workpiece support apparatus as defined in claim 26 , wherein rotation of the rotary fluid manifold is controlled by a spring loaded recoiler.
30. The workpiece support apparatus as defined in claim 19 , wherein each of the primary support columns and each of the secondary support columns has a top mounting adaptor adapted to receive a workpiece engaging member.
31. The workpiece support apparatus as defined in claim 30 , wherein several alternative workpiece engaging members having differing support characteristics are provided for the top mounting adaptors.
32. The workpiece support apparatus as defined in claim 30 , wherein a rigidifying frame is provided and each of the primary support columns has longitudinally extending grooves which receives bars of the rigidifying frame to provide lateral stability to the workpiece engaging member when mounted on the top mounting adaptor.
33. A workpiece support apparatus, comprising:
an elongate channel-form primary body having a first end, a second end, a longitudinal axis, a first sidewall and a second sidewall;
tracks extending longitudinally along each of first sidewall and the second sidewall of the primary body;
several height adjustable primary support columns extending vertically from the primary body, each of the primary support columns having a base with adjustable rollers that engage the tracks of the primary body for axial movement along the primary body whereby the primary support columns are selectively positioned;
laser alignment targets being provided on each of the primary support columns for aligning the primary support columns in a straight and level orientation along the longitudinal axis of the primary body;
elongate channel-form arms extending radially from and being pivotally secured at pivotal connections to each of the first sidewall and the second sidewall of the primary body, each of the arms pivoting about a substantially vertical axis for angular adjustment on a substantially horizontal plane, each of the arms having a first end, a second end, a longitudinal axis, a first sidewall and a second sidewall, each of the arms having underlying rollers, the pivotal connections having several apertures, the arms being locked in a selected angular position by inserting a locking pin into one of the several apertures;
tracks extending longitudinally along the first sidewall and the second sidewall of each of the arms;
height adjustable secondary support columns extending vertically from each arm, each of the secondary support columns having a base with adjustable rollers that engage the tracks of the arms for axial movement along the arms whereby the secondary support columns are selectively positioned;
each of the primary support columns and each of the secondary support columns having a screw levelling adjustment;
each of the primary support columns and each of the secondary support columns having a top mounting adaptor adapted to receive a workpiece engaging member;
each of the primary support columns and each of the secondary support columns being fluid activated telescopically extendible cylinders supplied with fluid through fluid lines, the fluid lines extend from each of the primary support columns to a rotary fluid manifold, upon rotation of the rotary fluid manifold in a first direction fluid lines are wound onto the rotary fluid manifold, upon rotation of the rotary fluid manifold in a second direction fluid lines are fed from the rotary fluid manifold, a plurality of direction altering rollers being used to route the fluid lines along the primary body.
34. The workpiece support apparatus as defined in claim 33 , wherein each of the fluid lines is segregated by means of a radially extending divider positioned on the rotary fluid manifold.
35. The workpiece support apparatus as defined in claim 33 , wherein rotation of the rotary fluid manifold is controlled by a spring loaded recoiler.
36. The workpiece support apparatus as defined in claim 33 , wherein each of the underlying rollers are spring mounted to a housing, the rollers having an extended position extending from the housing and a retracted position retracted within the housing, the rollers normally being in the extended position, the rollers assuming the retracted position when a load is applied that overcomes the biasing force of the spring mounting.
37. The workpiece support apparatus as defined in claim 33 , wherein several alternative workpiece engaging members having differing support characteristics are provided for the top mounting adaptors.
38. The workpiece support apparatus as defined in claim 33 , wherein a rigidifying frame is provided and each of the primary support columns has longitudinally extending grooves which receives bars of the rigidifying frame to provide lateral stability to the workpiece engaging member when mounted on the top mounting adaptor.
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CA002324820A CA2324820C (en) | 2000-10-30 | 2000-10-30 | Workpiece support apparatus |
CAUNKNOWN | 2002-01-15 |
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Also Published As
Publication number | Publication date |
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US6367788B1 (en) | 2002-04-09 |
CA2324820C (en) | 2004-05-04 |
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